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I installed Windows 7, which ate Ubuntu's boot file. When starting up the computer, it now goes straight to Windows, without giving me the option of booting Ubuntu.
How can I get Ubuntu back?
I installed Windows 7, which ate Ubuntu's boot file. When starting up the computer, it now goes straight to Windows, without giving me the option of booting Ubuntu.
How can I get Ubuntu back?
When you install Windows, Windows assumes it is the only operating system (OS) on the machine, or at least it does not account for Linux. So it replaces GRUB with its own boot loader. What you have to do is replace the Windows boot loader with GRUB. I've seen various instructions for replacing GRUB by mucking around with GRUB commands or some such, but to me the easiest way is to simply
Here's how:
If you cannot boot normally, and didn't do step 8 because there were no error messages, try again with step 8.
The Windows installer doesn't care about other OS in the system. So it writes own code over the master boot record. Fortunately the solution is easy too.
You need to repair the MBR. Do the following
Boot using a live usb/cd of ubuntu.
After booting with live usb/cd, run following command in terminal:
More info - https://help.ubuntu.com/community/Boot-Repair
I never got in trouble by using these instructions:
First of all, you must start your system from a live cd. Then
This method of installation uses the chroot command to gain access to the broken system's files. Once the chroot command is issued, the LiveCD treats the broken system's / as its own. Commands run in a chroot environment will affect the broken systems filesystems and not those of the LiveCD.
1) Boot to the LiveCD Desktop (Ubuntu 9.10 or later). Please note that the Live CD must be the same as the system you are fixing - either 32-bit or 64-bit (if not then the chroot will fail).
2) Open a terminal (Applications > Accessories > Terminal).
3) Determine your normal system partition - (the switch is a lowercase "L")
sudo fdisk -l
If you aren't sure, run
Look for the correct disk size and ext3 or ext4 format.
4) Mount your normal system partition:
Substitute the correct partition: sda1, sdb5, etc.
Example: sudo mount /dev/sda1 /mnt
5) Only if you have a separate boot partition: sdYY is the /boot partition designation (for example sdb3)
sudo mount /dev/sdYY /mnt/boot6) Mount the critical virtual filesystems:
sudo mount --bind /dev /mnt/dev sudo mount --bind /dev/pts /mnt/dev/pts sudo mount --bind /proc /mnt/proc sudo mount --bind /sys /mnt/sys7) Chroot into your normal system device:
sudo chroot /mnt
8) If there is no /boot/grub/grub.cfg or it's not correct, create one using
9) Reinstall GRUB 2:
Substitute the correct device - sda, sdb, etc. Do not specify a partition number.
grub-install /dev/sdX
10) Verify the install (use the correct device, for example sda. Do not specify a partition):
sudo grub-install --recheck /dev/sdX
11) Exit chroot: CTRL-D on keyboard
12) Unmount virtual filesystems:
sudo umount /mnt/dev/pts sudo umount /mnt/dev sudo umount /mnt/proc sudo umount /mnt/sys
13) If you mounted a separate /boot partition:
sudo umount /mnt/boot
14) Unmount the LiveCD's /usr directory:
sudo umount /mnt/usr
15) Unmount last device:
sudo umount /mnt
16) Reboot.
sudo reboot"
Boot from a live Ubuntu USB pendrive or CD
Open the terminal and run the following commands
After completing the installation you can launch it from System->Administration->Boot-Repair menu if you use Gnome, or search "boot-repair" in the dash if you use Unity. Then follow the following screenshots:
Method 1
Press Apply and Reboot the system
Method 2
Just install
Then you can choose Ubuntu on the Windows 7 bootloader to go to Grub2 (previous bootloader).
Boot-Repair worked for me. It's very very easy to use graphical application, you do not need to use the command line, you only have to click a button :)
All the available repair options are described in the Ubuntu documentation and there is a separate page explaining how to start Boot-Repair (by creating a bootable disk or installing it in an existing Ubuntu live disk) and how to use it.
Just boot a Ubuntu live CD, install Boot-Repair and run it.
There is now a simpler solution:
This has been tested on a Samsung Series 7 Chronos laptop dual booting Windows 8 and Ubuntu 13.10, secure boot disabled, UEFI and legacy boot enabled.
When GRUB is broken, the user generally does not have access to systems, so repair must be performed from a live-session (live-CD or live-USB).
There are many possible causes to a GRUB break: Windows writing on the MBR, DRM preventing GRUB from installing correctly, installer bug, hardware change... Updating GRUB as proposed initially by Scott is generally not sufficient, reinstalling GRUB as proposed by Marco is more efficient, but still there are various situations requiring other tweaks (adding options to kernel, unhiding GRUB menu, changing GRUB options, choosing the right host architecture...). Other difficulties for repairing GRUB is the use of chroot, and the choice of the right partitions /disks.
All of this has been made easy in a little graphical tool: Boot-Repair. It shall be integrated in Ubuntu 12.04 CD for easier use, but for people needing it now, there are already some distros integrating it: Ubuntu-Secured-Remix (Ubuntu CD integrating Boot-Repair), Boot-Repair-Disk (CD running Boot-Repair at start-up), ...
Hope this helps.
Windows does not see Linux formatted partitions. You need to use gparted from a liveCD and create a primary partition formatted NTFS with the boot flag.
Some have had issues if the new primary partition is after the extended partition as Windows does not always reset partition table correctly. Best to have good backups and a separate backup of partition table.
Backup partition table to text file & save to external device. sudo sfdisk -d /dev/sda > PTsda.txt
This is only for MBR(msdos) systems. If your Ubuntu install is in gpt partition drive you can only install Windows in UEFI mode or convert drive back to MBR(msdos).
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Yes, Dr. Oz called Garcinia Cambogia Extract (HCA) the Holy Grail of Weight Loss. He went on to say, "Anytime I see a scientist get this excited about something like Garcinia Cambogia Extract and when I looked through some of this research and called these scientists myself, I get excited. That's why Garcinia Cambogia Extract makes sense to me and fascinates me." We'll tell you why he said that, and give you his recommendations on what to look for when buying this exciting new weight loss supplement.
One of the primary scientists he was talking about was Dr. Julie Chen, specialist in health and wellness explained some of the most important facts on this revolutionary supplement. The supplement is extracted from the rind of the Garcinia Cambogia fruit (a small pumpkin shaped fruit sometimes called a tamarind) and has been around for a long time which made Dr. Oz feel "comfortable about the safety." Dr Chen said their studies showed an increase in weight loss 2 to 3 times more than those not taking any Garcinia Cambogia Extract, which resulted in up to 10 pounds or more per month without change to diet or exercise. Dr. Chen called it a "Dual Action Fat Buster" that suppresses appetite and prevents fat from being made.
The top 5 reasons they said Garcinia Cambogia Extract was the "holy grail of weight loss" were:
♥ It acts as a Fat Blocker, which means fat cells will not be allowed to form ♥ Appetite Suppressant and Controls Cravings ♥ Decrease in Belly Fat ♥ Emotional Eaters will see an increase in Serotonin which will balance moods ♥ Helps in managing Cortizol the stress hormone
Since Dr. Oz recommended Garcinia Cambogia Extract, naturally there will be a lot of products that do not meet the criteria he set. Many people just buy the first thing they find on Amazon and end up with a poor product. We don't claim to have any special affiliation with Dr. Oz or use his image on our site as we've respected his statements that he does not endorse any one product. It is important to know that he DOES ENDORSE ingredients. So we're committed to presenting products that meet the Dr. Oz standard.
Use the above exclusive link for FREE Trials
Real Testimonials, From Real People
Missy was one of the featured weight busters who had been taking Garcinia Cambogia fruit Extract for a while and lost over 10 pounds! She said she started to notice a change in her body after only 1 week. She talked about the instant effects it had on her, "I noticed an instant decrease in my appetite and especially with sugars and carbs. Aside from that I saw an increase in energy, and saw no negative side effects." This was so inspiring and amazing to have someone we could see that had such success and looked great.
Dr. Oz Buying Guide
Here's what to look for in a Garcinia Cambogia Extract supplement:
♥ Has the name Garcinia Cambogia (HCA) on the bottle ♥ Contains 50% HCA (hydroxycitric acid) ♥ Contains Potassium and Calcium (helps with metabolism) ♥ Daily Serving Size: 1500 MG ♥ No Fillers, Binders, or Artificial Ingredients


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Where does the phrase "holy crap on a cracker" come from?
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- Anybody can answer
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Probably not the answer you're looking for but possibly still relevant/interesting.
If we can believe Wiktionary, it says:
Going with that...
So I'd suspect sometime in the early 1900s, as
The only result in Google Books is 2006's Brothers and Sons: An Epic Comedy Adventure by Dana Myrick:
In Google Groups there's an older result from Jul 13, 2001 in by John in rec.music.phish:
There's a dozen "crap on a cracker" results, the oldest is apparently from 1992's Usher's Passing by Robert R. McCammon but there's no preview to confirm. The next is 1996's The Basement by Bari Wood:
The oldest "Holy * on a cracker" from Google Groups is "Holy hell on a cracker!" from Oct 12 2000 in alt.roundtable.
The related "Jesus Christ on a cracker" can be found in 1993's Save me, Joe Louis by Madison Smartt Bell:
Finally, as a bonus, here's what holy crap on a cracker looks like.
This is pure speculation, but I would guess it came from the expression "Christ on a cracker!", which I've heard many times in my life. This could refer symbolically to Christian communion, where the wafer is said to literally become "the body of Christ".
Instinctively, it makes me think of something horrible being served or given in an otherwise palatable package. Perhaps something that should have been good (the cracker) is then totally spoiled by something unforeseen or unwanted (the holy crap).
"Crap on a cracker" is a name for the dish "chipped beef on toast", which was commonly served to people in the armed services, and much disliked. Also called "shit on a shingle".
At a guess, it was probably 'Crap on a Crutch' until someone (in media) decided that wasn't PC enough, and it spread from there.
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Showing 1-20 of 20 items found in Outdoors & Play
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The Orchards offers an 18-hole golf course.
Designed by golf legends Pete Dye and Bob Goalby, Yorktown offers an 18-hole lit par 3 golf course.
Belle-Clair Fairgrounds & Exposition Center
Home to the annual St. Clair County Fair, several craft shows and monthly flea markets, the complex also includes the Belle-Clair Speedway, with stock car races and demolition derbies.
National Shrine of Our Lady of the Snows
The Shrine has 200 beautifully landscaped acres of gardens and devotional areas, including the Outdoor Amphitheatre, Shrine Church, Lourdes Grotto, Stations of the Cross, Millennium Spire, the Visitors Center with a restaurant and gift shop, and the Shrine Hotel.
A 5,000 sq. ft. laser tag arena and a 2,500 sq. ft. game arcade is conveniently located by hotels and restaurants off I-64.
This par 72, Goalby-designed golf course has 18 challenging holes.
Grand Marais includes an on-site restaurant and pro shop.
Moody Park (formerly Longacre Park)
Lighted tennis courts, playground, sand volleyball courts, baseball, softball, and soccer fields. a 1.5 mi walking/running path, concession stands, picnic pavilions, a large lake. The Midwest Salute to the Arts is held every year here in August.
CITY:Fairview Heights
An ice arena offering hockey leagues open skate and entertainment for all ages. The facility offers two rinks, a game room and concession area.
CITY:Fairview Heights
Tucked back away from the street, a relaxing place to get away from it all is Pleasant Ridge Park. The centerpiece is the Kensella Log Home.
CITY:Fairview Heights
The 18-hole, par 72 Stonewolf is one of only four Jack Nicklaus Signature courses in Illinois and Missouri.
CITY:Fairview Heights
Julius J. Knobeloch State Nature Preserve
Beautiful. untouched nature preserve which way originally purchased by the Knobeloch family in 1874. After a family disagreement, the land was auctioned off to the nature conservancy and then sold to the Illinois Department of Natural Resources.
40 sites, lake swimming and fishing, tent camping, handicap access.
Stop in or make a reservation to ride the trails. Lessons are also available.
This 18-hole golf course opened in 1962.
Spend the day tackling go-karts, miniature golf, batting cages, bumper boats and a video arcade.
This 18-hole golf course was designed by Pete Dye.
Three Springs Park is a multi-purpose facility with a lighted softball and baseball field that can be converted in to smaller fields for a total of six. Also at the park are tennis courts, soccer fields, basketball courts, and volleyball courts. a half-mile walking trail and playground equipment round out the amenities.
The 24-acre park has a pavilion, walking trails, and many other amenities. It is also the site of the Veterans of All Wars Memorial and the September 11 Memorial.
Boasting some of the largest greens in the Midwest, the 18-hole Clinton Hill has matured into one of the finest public golf courses around, with a great blend of par 3s, 4s and 5s.
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Leon Hiebert was pastor of Andover Assembly of God (Generations Church A/G) from 1989 to 2009. He is a Viet Nam veteran who spent 10 years in the US Navy most of the time as a corpsman serving with the Marine Corps. A native of Belleville, Kan., Hiebert is semi retired and lives in Andover with his wife, Sharon. He is a school bus driver for USD 385, Andover, Kansas.
Scripture: 2Corinthians 9:15 Thanks be to God for his indescribable gift! (NIV)
Observation: In this verse Paul is ending his teaching on giving. It was the indescribable gift that motivated Paul. Paul's high values of what God had given him caused him to willingly and joyfully give his life for the gospel.
Application: My value of what God has given me helps set my level of giving. The more I value what God has given me, the more I am willing to give. The more I value what God has given me, the more I am willing to endure any hard times that come my way!
Prayer: Lord, it is worthwhile serving you! It is worth any struggle. It is worth giving my best and giving up what I may like best. Amen
Pastor Leon
Making friends for time and eternity!


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Larry Joel of Bridgeport, Connecticut
And everyone who goes into combat gets wounded, whether they know it or not. It leaves a mark forever. I'd changed but I didn't know it. I was traveling and people called me hero, but I felt like nothing. It got so bad at home I got a room in the barracks. My son was caught in the middle. Once we were fighting and we looked up and he was gone. We broke up shortly after that.
"Some officers looked down on me if I refused an appearance. Others thought I was avoiding detail and was just chasing glory. I felt tossed between the Devil and the Lord Almighty. I got sick of trying to please so one day I said I wanted to go back to Vietnam. I spent that Christmas 1969 in Vietnam. That's how bad I wanted to escape.
"I stayed 17 months that time. I was assigned to the brigade commander and I'd go with him in his helicopter twice a day when he directed operations. I asked to go on patrol but they wouldn't let me, (He received a Bronze Star for his actions during a mortar attack, however,) When I came home I couldn't adjust to regular soldiering. I got a ticket for drunken driving and I saw the handwriting on the wall. I had my 20 years so I retired. I had five sisters and a brother in Bridgeport. All I had was my footlocker, $1,500, and some medals. I got a job at the VA and threw myself into it. I put myself in the hospital to stop drinking. I'd tried stopping so long for other people — when I tried stopping for myself I found I could do it. I don't think I really came back from Vietnam until the day I finally stopped drinking."
He finishes his dinner in silence. Because he's diabetic he downs another coffee in place of dessert. When he walks out the door he calls to the young Greek, "Good luck."
A few months passed. He applied to be health administrator of a veterans' nursing home, a job he wanted very badly, and was rejected. He said he was really feeling the strain of his job, often feeling he was on the wrong side, having to tell veterans their claims were not justified under the law. Sometimes the wrath of a veteran denied benefits would be directed at Larry; at such times he said he felt powerless. He just wanted out. In summer word came that Larry was in intensive care in the VA hospital, stricken with an ulcer. "If the doctor had laid me I was dying," he'd say later. "I wouldn't have gotten excited. Least I'd have been out of pain."
He brooded. "Seems I'm hustling backwards, seems I'm winding down," In the hospital he made plans to file for a government disability pension. He had few needs and he would get by on that plus his $200 Medal of Honor pension and his army retirement. He looked forward to writing the story of his life. "It'll be like Roots." In November his disability claim was rejected.
We met the day after Christmas. He had moved with his sister across town, next door to another sister, a roomy four-bedroom house, still crowded with nine people. He shared his bedroom with his nephew. With little privacy his patience wore thin and sometimes he'd yell at his sister's three young grandchildren at the slightest provocation. I drove to his house, but he wasn't there. He phoned. He had a flat tire across town. Could I pick him up? We came home for his insulin injection, then drove to a nearby steak house. He was wan, tired.
He said he knew he needed help to get his life in order. He would start back at the VA in January, part-time, and was debating whether to move to New Haven or Hartford or to stay put. He would work on getting medical evidence that he could no longer tolerate the stress of his work.
I wondered if he realized that soon it would be 15 years since he received his medal. He shook his head in surprise.
"I tell myself it's going to be better," he said, smoke trailing from his cigarette above his glass of milk. "I don't let myself stay down. I saved a lot of people's lives once. Now I've got to help myself."
"You were a good medic, weren't you?" I asked.
He brightened. "The best," he said, "the very best."


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Football: Crusaders hoping for an encore
Holy Cross' upset of previously unbeaten Woodland last Friday was pretty good, but Crusaders coach Mike Giampetruzzi hopes his squad has something better in store for tonight's encore against Naugatuck.
"You can't let that be the best thing that happens," Giampetruzzi said of the 37-18 win that gave Cross control of the Naugatuck Valley League Copper Division. "You have to regroup and come back stronger."
The Crusaders can clinch their third division title in five years with a victory in tonight's game, which kicks off at 6 p.m. at Municipal Stadium. They are also trying to stay alive in the Class S playoff race, where Cross currently holds the eighth and final qualifying spot.
Naugatuck has almost the same riding on the game. It can stay alive in the Copper race (and would take the lead with a Woodland loss to Torrington on Friday) and the Class L postseason hunt, where the Greyhounds also sit eighth.
All together, it's the biggest stage the NVL has had to offer this fall.
"This is what you live for," first-year Naugatuck coach Craig Bruno said. "If you do this job and you play this game, this is what you want. You want the other team to be good and you want to be on the big stage. This is very exciting for the kids and myself, and I can't wait."
Both teams are peaking at the right time. Holy Cross has won five in a row after a 1-2 start while Naugatuck is on a four-game winning streak after tripping up against Woodland in Week 4.
The Crusaders' win over Woodland seemed more unlikely after they struggled to put away then-winless Torrington the week prior, the same time when they lost starting running back Drew Bialoglowy to an ankle injury.
But Cross turned in a magnificent performance against the Hawks. The Crusaders forced four turnovers, held Tanner Kingsley to a season-low 143 passing yards and held the ball for more than two-thirds of the clock thanks to seven different players
See NVL, Page 8B
seeing touches. Trai Weaver led the way with four touchdowns and 174 total yards.
"We've had that kind of mentality all year—the next kid who comes in has to pick up the pieces," said Giampetruzzi, who expects Bialoglowy to play. "At one point in the game Friday, we had four or five different backups in. It truly was a team win."
Holy Cross' defensive front, led by defensive end Gerron Pendarvis, kept Kingsley uncomfortable all night. Giampetruzzi said that's a goal against another talented quarterback in Naugy's Jason Bradley. He threw for 286 yards and five touchdowns last week against Wilby, but he's also a threat to run.
"We're going to try to still bring pressure but we're going to try to contain him a little more," Giampetruzzi said. "Some of the angles we'll use will change a little bit. We're counting two guys (Bradley and Tom Douty) as running backs. I'm more worried about (Bradley) running and beating us that way."
Bruno and his staff are anticipating pressure from Pendarvis and linebackers Bryan Burnette and Mike Gugliotti. The Greyhounds, who love going deep, will try to get the ball out of Bradley's hands fast.
"We have to get some quick throws," Bruno said. "We have to know where their best pass rushers are. We have to make adjustments to what they do, but we do what we do. We're not going to change everything, but we have to be ready."
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In my work this week I came across a group with presentation with two generators $a$ and $b$ subject to the relations $baba=1$, $a^2b=ba^2$, and $ab^{-n}ab^n=b^nab^{-n}a$. This group looks like the lamplighter group or something to me, but I couldn't get a sequence of Tietze transformations from this group to the standard presentation for the lamplighter. Does anyone know what this group is? thanks.
All relations of the form $ab^{-n}ab^n=b^nab^{-n}a$ follow from $baba=1$, $a^2b=ba^2$ (exercise). So the group is isomorphic to $G=\langle a,b\mid baba=1, a^2b=ba^2\rangle$. The later splits as a central extension $1\to \mathbb Z\to G \to D_{\infty }\to 1$. I do not think the group has a name.
The first two relations alone give a polycyclic group of Hirsch length 2 ($a^2$ is central, quotienting by it gives the infinite dihedral group $D_\infty$), which, thanks to Denis Osin's answer, is already the whole group. Even without that knowledge, it is still a quotient of this group, and so polycyclic of Hirsch length $\leq 2$. In particular, it is far too small to be the lamplighter.


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Missing siblings found in Florida
Published: Tuesday, July 9, 2013 at 2:21 p.m.
Last Modified: Tuesday, July 9, 2013 at 2:21 p.m.
Two children reported as missing May 29 have been located in Altamonte, Fla., the Hendersonville Police Department said Tuesday.
Hannah Shaw, 9, and Hailey Shaw, 7, were found in the presence of their mother, the police department said in a news release. The girls' father, Christopher Shaw, has gone to Florida and as of today custody of the girls has been restored to him, according to the release.
Also in the release, the police department thanked the public in Hendersonville and Florida for their assistance and the National Center for Missing and Exploited Children and various law enforcement agencies that assisted in locating the children.
Reader comments posted to this article may be published in our print edition. All rights reserved. This copyrighted material may not be re-published without permission. Links are encouraged.


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Screencast - Transactional NTFS
- Posted: Mar 09, 2007 at 1:29PM
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Welcome everybody to the inaugural, first ever, grand opening, "opening the doors to the public" celebration day kick-off for the new "Developer, Meet Server" screencast series.
I am your sincere, humble (as ever), gracious and wonderful host/chef/tour guide Jason Olson.
In this series of screencasts we will be diving through all the various cool developer-oriented enhancements on the Windows Server "Longhorn" platform that developers can leverage to build robust and powerful applications. Specifically, in this first screencast,
we will take a quick peek at Transactional NTFS. In future screencasts, we will go into a more detailed look at Transactional NTFS, so think of this as a quick introduction.
This screencast is more PPT-heavy than normal as there are some basics we need to cover as an introduction into the series. Expect future installments to focus a lot more on getting into the nitty gritty of the code itself.
Sample Code: Transactional NTFS Demos.
-Jason Olson
Oops, something didn't work.
Been waiting on this for a while
Thanks, more please.
jamesclrk wrote:
Ummm... do we really need another one of these? I'd dig a Beck iPod, or a Wynton Marsellis iPod (in fact, that makes sense, considering the iTunes session...)
thanks keep posting such interesting stuff.. thanks MichaelJ
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Need Help? Call 877.812.6235
Farmer D Organic Planting Mix
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Daron Joffe, the founder of Farmer D Organics, is committed to biodynamic farming and earth-friendly practices. His custom planting mix provides ideal drainage, moisture retention and fertility.
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- 45% aged pine bark, 30% Farmer D Biodynamic Compost (composted cotton gin waste, composted pine peelings, chicken litter, composted green waste, peat humus, granite dust and biodynamic preparations [processed yarrow, chamomile, nettle, oak bark, dandelion, valerian and horsetail herb]), 15% peat humus, 10% topsoil, 5% sand.
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Shipping Information
This item will be shipped directly from the manufacturer and is not eligible for rush shipping. Please allow up to four weeks for delivery.
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At Williams-Sonoma, we take great pride in the quality and craftsmanship of our products. Attention to design, materials, safety and construction are our priority. Upon receipt, please inspect your purchase and notify us of any damage; we will arrange for a prompt replacement.
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Home > Toyota > Toyota Auris HSD 2011
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Toyota Auris HSD 2011
Exclusively designed for the European market, the Auris HSD (Hybrid Synergy Drive) introduces full hybrid technology to a core model at the heart of Toyota's model line-up. It marks the first step in the deployment of HSD technology across the company's entire European model range by the early 2020s. Latest-generation Toyota Hybrid Synergy Drive to deliver class-leading CO2 emissions and combined cycle fuel economy.
It will be offered in Two versions in Europe – delivering 89g/km emissions and 74.3mpg combined cycle fuel economy and 93g/km emissions and 70.6mpg combined cycle fuel economy.


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Is it a good idea to install Subversion on a production server?
Let's define "Good idea" here. By the way, I'm making some assumptions here-- by svn you mean a client, not a source code repository. By production server, I'm assuming you mean a world-facing webserver or something similar.
svn itself probably won't hurt a production server. As Evan Anderson said, it's a userland process that doesn't do a lot of harm to the machine it's running on.
However, it's probably a really bad idea for a world-facing server to be able to read from your source tree. The machines that are hanging out there for the whole world to see have a fair higher probability of being compromised, and when that happens you don't really want the hacker to be able to check out your technical crown jewels.
I would have no qualms putting a svn client on a production server so long as it could only access a restricted set of data-- production configuration files could be one good use for this, and system administration scripts could be another.
In summary: I don't think installing svn on a production machine is a particularly good or bad idea-- if there's significant utility in it, then do it. I do, however, think it's a horrible idea for production servers to have access to the main source tree whether it's through svn or some other mechanism.
Well, that depends. If by production server you mean installing it on your production web/database server, then probably not. If by production server you mean "a server that's reliable gets backed up", then yes.
I would avoid putting subversion on a server with other production apps, especially if it's web-accessible and doesn't need to be. Last thing you want is somebody hacking in there and stealing (or breaking/deleting) your source code.
Umm-- if you need it. It's a user-land process, so it's not likely, regardless of server operating system, to radically affect server performance (i.e. crash OS, etc). In general, if you need something on a server you should install it. If you don't, you shouldn't. (I know that sounds a little silly, but you'd be surprised how many servers I find with HTTP / SMTP / etc server programs running on them for no reason.)
To decide which particular server computer to install it onto depends on a lot of factors-- capacity, security, accessiblity for the users who are using it, co-existance with other software that might need the same TCP ports, etc.
I would have said SVN is the safest way of rolling out code to the production server.
If your goal is to use it to track changes to the system's configuration files which is a good idea but there are better tools for doing that.
Such as etckeeper. This tool does require that you have a repository somewhere that the server(s) can access.
Installing the svn client shouldn't give you any trouble. It's stable userland software and will allow you to reduce the chance of errors on deployments.
I would suggest setting it to not store passwords though. Just in case someone breaks into your production server, it would be bad if that gave them free access to your source-code repository. Read this FAQ on how to disable password caching.


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Entries in 'sce' (7)
OnLive closes down and sells assets to Sony
OnLive will shut its services this month, and has sold some of its assets to PlayStation.
Sony didn't believe PlayStation 'would ever be a major part' of its business
PlayStation was viewed extremely negative from large parts of Sony before it launched, Andrew House revealed at Develop Conference today.
FROM THE ARCHIVE: The House that PlayStation Built
Back in 2011, days before Andrew House moved to Japan to become CEO of Sony Computer Entertainment, MCV sat down with him to conduct his final interview as Sony Europe ...
VIDEO: From Software's Bloodborne PS4 exclusivity confirmed
Bloodborne will be an exclusive PS4 title, it has been confirmed.
Ex-Infinity Ward vets take to Kickstarter with To the Death
A pair of indie studios led by a trio of industry veterans have launched a Kickstarter campaign for 2D action side-scroller, To the Death.
The Mark of greatness: Profiling Mark Cerny, the man who made the PS4
He built arcade classic Marble Madness. He produced Sonic 2. He brought Crash and Spyro to market. Oh, and his PS4 design reignited passions for Sony. MCV meets Mark Cerny ...
The Last of Us is UK No.1 for a fourth week
The Last of Us has done what BioShock Infinite and Dead Island: Riptide could not, and that's score a fourth consecutive No.1 in the UK charts.


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Amy Michelle rocks my diaper bag world. It may seem a little wacky, but the main reason I'm gaga over this bag: it zips shut! I can't tell you how many zipper-less diaper bags I've used in the past and my number one complaint with each of them has been "no zipper." Yes, I know they're made like that on purpose to give us easy access, but some of us would prefer to keep the contents from falling out every time we throw the bag down. So thank you Amy Michelle for making my zipper dream come true. (There's also a magnetic flap across the bag to keep it shut, if you prefer …)
I also love this bag because it's sassy, yet down to earth. It has personality, but it's not cutesy or pretentious. Nor does it scream diaper bag. In fact, it resembles a few of my regular purses, except it's large enough to fit both my stuff and my baby's stuff. It's stylish and well made. I feel like I'm getting my money's worth too, since I use it for everything from toting baby goods to traveling, running errands and going to dinner. I even use it for work, and with a little crafty maneuvering can fit my laptop in there.
I fly by the seat of my disorganized pants and hardly use pockets in bags, but there's plenty in there


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I deployed some basic reporting on the anon and low rep post feedback:
http://stackoverflow.com/tools/post-feedback (10k users only)
Turns out this system is really effective at getting feedback about the long tail.
On average feedback is left on posts that are 6 months older than the posts being voted on.
The reporting has highlighted areas where there is information rot, for example these questions contain old unhelpful content that people stopped voting on:
- When should I use a struct instead of a class?
- Response.Redirect to new window
- What is the basic difference between Factory and Abstract Factory Patterns?
- How to get current datetime on Windows command line, in a suitable format for using in a filename?
- How can I reverse the ON bits in a byte?
- CSS background color in JavaScript
Here are some questions containing apparently helpful information, that people stopped voting on:
- What is a privileged instruction?
- How to temporarily disable a message listener
- Are these good interview questions for Flex developer?
- Is a JOIN faster than a WHERE?
- How to group by week in MySQL?
Looking through these question lists it is pretty clear that we need a strategy to deal with high value content that has been either "abandoned" or "neglected".
Over a question's lifetime it attracts many answers and the answers attract many comments. This makes it way harder for an end user to decipher what the solution to the problem is.
Now that we have some pretty good ways to isolate high value questions, what can we do to shape them up?
Do we need new site features to deal directly with this problem? (EG. edit bounty/edit voting)


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I was just playing around with pointers. In the following code what i feel is once check is executed the variable i and j must get killed as soon as the function returns. So actually we should not be able to collect it in the variable 'c' inside the main. Guys please tell whether my justification is right or wrong ?
int* check(int,int); void main() { int *c; c = check(10,20); printf("\nc = %d",*c); } int* check(int i, int j) { int *p, *q; p = &i; q = &j; if(i >= 45) return(p); else return(q); }
Last edited by shabbir; 29Mar2008 at 17:27.. Reason: Code block


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DeKeyser named Whitefish Bay girls basketball coach
Rick DeKeyser, who recently resigned after coaching the Nicolet girls basketball team for the last two years, was named the coach for the Whitefish Bay girls basketball team this evening.
DeKeyser was offered the position this weekend and immediately accepted, said Bay Athletic Director John Gustavson. DeKeyser plans on meeting with the returning basketball players sometime this week at lunch.
DeKeyser said he was not actively pursuing any head coaching positions after his resignation and had accepted a job as an assistant at another school before the Bay position came up.
"This was the only job I would have accepted," said DeKeyser. "In fact, I was offered two other jobs (head coaching) after I resigned and I said 'no' to both of them."
DeKeyser takes over for former Bay assistant Dave Markson, who served as a successful interim coach this season.» Read Full Article
Dredging to remove contaminated muck from Milwaukee River
Milwaukee River between Lincoln Park and the Estabrook Park dam, state and federal officials said.An estimated 36,000 cubic yards of contaminated muck will be removed this year from the
There are nine places in this mile-long stretch where chemicals known as polychlorinated biphenyls, or PCBs, accumulated in the river-bottom sediment, said Marsha Burzynski, a water resources management specialist with the state Department of Natural Resources. Total cost of dredging the deposits from the river is estimated at $15 million.
Information on the locations of the contaminated muck and proposed dredging methods will be discussed at a May 20 open house at Lincoln Park. The informational meeting is scheduled from 4 to 7 p.m. inside the Blatz Pavilion, 1301 W. Hampton Ave.
Most of the muck will be disposed of at landfills in Wisconsin, Burzynski said. An estimated 500 cubic yards of highly contaminated sediment must be shipped out of the state to specially licensed landfills.
The majority of cleanup costs will be paid by the U.S. Environmental Protection Agency through its Great Lakes Legacy Act.» Read Full Article
Life sentence for homeless man who killed former benefactor
A homeless man convicted of killing a Glendale resident who was found buried under clutter in his home days after he was reported missing last fall was sentenced Thursday to life in prison.
Nicholas Retzlaff, 26, who as a troubled teen had been taken in by the victim, pleaded guilty in March to first-degree intentional homicide, as party to a crime, in the death of 65-year-old peace activist Peter Holzberger.
Milwaukee County Circuit Judge Timothy Dugan, noting that a friend said Holzberger believed anyone could find redemption, even in prison, made Retzlaff eligible to apply for supervised release in 45 years.
Retzlaff's attorney, Gregory Renden, read a statement from his client expressing his apologies and saying "the only person who ever cared about me was Peter."
Rendan said Retzlaff, who suffered abuse and neglect from his parents until they kicked him out in 2004, suffers from Asperger's syndrome and doesn't really have the capacity for empathy, to understand how his actions affect others.» Read Full Article
North Shore Boulangerie combines cafe with bakery in Shorewood
North Shore Boulangerie opened Wednesday at 4401 N. Oakland Ave. in Shorewood, with baked goods as well as prepared foods for lunch.
Customers can expect to find items like croissants ($2.50) and quiche such as goat cheese-leek ($6.25 a slice) in the cases. The bakery-cafe has a barista making espresso drinks.
Owner Gene Webb said he has seating for 30 at North Shore Boulangerie, which is open daily from 6 a.m. to 6 p.m.
To contact: (414) 963-2153.
Homestead boys and girls track teams win North Shore Relays
Homestead pole vaulter Elyssa Tracy is said to be "as mentally strong as they come" by Highlander girls track coach John Krueger.
She has endured multiple surgeries on her feet and ankles after a lifetime of competing in sports, including a successful run for the Highlander gymnastics team.
A team it seems, that has made an en masse transition to the track squad.
So with that tough backstory behind her, it was small potatoes for Tracy when she decided to go for and clear 10 feet-nine inches in at the end of the North Shore Conference Relays on a chilly day in Grafton on Wednesday and break the tie with Nicolet for the event title in the final competition of the night.
And with that effort, the Highlanders completed their rally and overcame a challenge from a young and talented Germantown team to claim the meet title in a stunning three-way battle with Germantown and league indoor champ Whitefish Bay.» Read Full Article
Tasting room closing could change Shorewood loan
A village loan to help finance the opening of a craft brewery's Shorewood tasting room could change with that tavern's recent closing.
Big Bay Brewing Co. in December 2010 received a $25,000 loan to open the tasting room, at 4517 N. Oakland Ave., and to buy kegs for its beer.
Big Bay, which brews its brands at Stevens Point Brewery, in April closed the 2,100-square-foot tasting room, which opened three years ago. The adjacent Three Lions Pub is remodeling it as an addition.
The village loan required Big Bay to maintain its business within Shorewood's Oakland Ave. tax incremental financing district.
So, Big Bay President Jeff Garwood is asking the Shorewood Community Development Authority to waive that requirement while the company continues to pay off the loan. Big Bay still owes $15,657, with the loan scheduled to be paid off by Jan. 1, 2018, according to a village report.» Read Full Article
MMSD goes with mandate to disconnect downspouts from combined sewers
disconnect roof downspouts from combined sanitary and storm sewers.The Milwaukee Metropolitan Sewerage District is moving forward this month with new regulations requiring owners of most homes, duplexes and four-unit apartment buildings in central Milwaukee and eastern Shorewood to
The mandate would take effect Jan. 1, 2016, and apply to all buildings served by combined sewers. Deadline for disconnections is Jan. 1, 2025.
Primary targets of the regulations are residences with lawns big enough to absorb the water, MMSD Executive Director Kevin Shafer said Monday.
Most commercial businesses and large apartment buildings likely would be exempt since they generally are surrounded by pavement and water from a disconnected downspout would drain to the street and enter a combined sewer anyway.
Any property owner could be granted an exemption from disconnecting one or more downspouts if there is not adequate space on a lot for the water to seep into the ground, under the regulation.» Read Full Article


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Saudi Monetary Agency implements new regulations on charity accounts
The Head Office of the Saudi Arabian Monetary Agency (SAMA) recently distributed a circular to all banks and financial institutions in the Kingdom of Saudi Arabia requiring the full and immediate implementation of nine new policies and procedures that relate to the accounts of charitable and welfare institutions.
SAMA Governor Hamad Saud Al-Sayyari issued the following order in regard to the updated directives: "These rules and instructions are to be implemented immediately upon receipt of this circular, and SAMA is to be informed on the actions taken."
According to Ambassador to the United States Prince Bandar bin Sultan, "Charitable funds can no longer go outside of Saudi Arabia without strict government oversight and control."
The new policies and procedures have been implemented to ensure that funds meant for charitable purposes are not misappropriated.
For example, all bank accounts of a charitable or welfare society must be identified and consolidated into a single account for each such society; and deposits in these accounts will be accepted only after the depositor provides the bank with identification and all other required information for verification.
No charitable or welfare society can open or operate these bank accounts without first presenting a valid copy of the required license. Cash withdrawals from such accounts are strictly prohibited.
Ambassador Prince Bandar bin Sultan declared: "We have closed the door on the possibility for charitable giving to be misappropriated for illegal purposes."
In another memo issued by SAMA's Head Office regarding its Rules Governing Anti-Money Laundering and Combating Terrorist Financing, the Agency states: "SAMA intends to verify the implementation of these rules by Saudi banks through the Agency's on-site inspections, receipt of regular compliance reports and certification by external auditors."
The rules incorporate the Banking Control Law, all of SAMA's regulations, the FATF 40 Recommendations, the FATF 8 Special Recommendations on Terrorist Financing, and all relevant UN Security Council Resolutions.
Saudi Arabia remains determined to combat and bankrupt terrorism. Since the recent terrorist attacks on Riyadh, the Kingdom has accelerated its counter-terror activities and efforts in order to protect the security of its citizens and residents. — (menareport.com)
© 2003 Mena Report (www.menareport.com)
Top Headlines
- Fighting 'tasattur' with xenophobia? Saudi Arabia to 'keep an eye' on expats' bank accounts
- New regulation requires expatriates to hold Saudi bank accounts
- Saudi Arabia imposes new measures on local charitable organizations
- Saudi Arabia tightens controls on charities
- SAMA's unprecedented role in safegaurding the Saudi economy


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Speakers at Rutgers School of Law–Newark's second annual "Patent Law and Pharmaceuticals Symposium," to be held at the law school on Tuesday, September 23, will address top-level issues affecting patent law and the drug industry. The symposium is co-hosted by the New Jersey Intellectual Property Association and sponsored by Weil, Gotshal & Manges LLP. The agenda follows:
Noon – 1:15 pm
Lunch, Opening Remarks, and Keynote Address
The Hon. Pauline Newman, U.S. Court of Appeals for the Federal Circuit
1:30 – 2:30 pm
"An Examination of the Proposed Local Patent Rules for the District of New Jersey"
The Hon. Stanley R. Chesler, U.S. District Judge for the District of New Jersey
Edward R. Reines, Esq., Partner, Weil, Gotshal & Manges LLP
Robert G. Shepherd, Esq., Managing Partner, Mathews, Shepherd, McKay & Bruneau, P.A., moderator
2:45 – 4:00 pm
"Do Patent Settlements Between Brand Name Companies and Their Generic Rivals Violate the Antitrust Laws? An Exploration of Recent Trends and Legal Developments"
Daniel A. Crane, Associate Professor of Law, Cardozo School of Law
C. Scott Hemphill, Associate Professor of Law, Columbia Law School
Keith Sharfman, Professor of Law, Marquette Law School
Sabrina Safrin, Professor of Law, Rutgers School of Law–Newark, moderator
4:15 – 5:30 pm
"Views From Industry: Senior In-House Counsel Discuss the Patent Issues That Matter Most to Pharma"
Henry Hadad, Vice President & Associate General Counsel, Intellectual Property, Schering-Plough Corporation
David Manspeizer, Vice President Intellectual Property and Associate General Counsel, Wyeth
Jeffrey N. Myers, Ph.D., Vice President and Assistant General Counsel, Intellectual Property Enforcement, Pfizer Inc.
Nicholas Groombridge, Adjunct Professor, Rutgers School of Law–Newark, moderator | Read Story


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WELLSBURG - A Wellsburg home whose owner has reported strange and eerie incidents will appear on a nationally broadcast television cable show.
John Collins said he hopes sharing his tale through the Biography Channel's "My Ghost Story" will help people to understand what he has experienced.
"I just want my neighbors not to think I'm crazy," said Collins, who has lived at 70 28th St. since 1995 but said he didn't experience anything unusual until 2007.
Article Photos
John Collins of Wellsburg shows the headstone he found buried near his home, and he believes it is linked to strange incidents there. Collins and his home have been filmed for an upcoming episode of the Biography Channel's 'My Ghost Story.' -- Warren Scott
The show is scheduled to air at 9 p.m. Friday. The date has been changed from an earlier one announced in the Brooke Scene.
The series features stories of supernatural phenomena reported by people throughout the U.S.
Collins said he was working on his sport utility vehicle in his garage when the lights began flashing on and off at various times during that winter. Thinking an underground power line to the garage had been damaged, he dug into the ground and discovered an old headstone.
The stone is well worn, with no name visible.
"That's when spooky stuff started to happen," he said.
Collins said one night he heard the kitchen door open, followed by footsteps and then a glowing blue ball of light floated into his young daughter's bedroom and then his while he was reading in bed.
It stopped at the foot of his bed, then disappeared, he said.
Collins said the next night he heard a crash in the room of his daughter, who wasn't home. When he entered it, he found her sack of toys had been emptied onto her bed, and the cloth bag was standing upright.
Collins said his mother, who also lives at the home, told him the strange sights were his imagination until she returned from the bathroom one night to ask who was trying to enter. She said the door handle was shaking as if someone was trying to open the door, but no one in the family had gone to the door, he said.
Another time his mother reported hearing someone in heavy boots pass her in the kitchen and feeling a chill in the air, Collins said.
He said at one point he considered burying the stone and he discovered a small stone block bearing the letters "YCUL" carved in it and learned it was likely used to engrave the name "Lucy" on a grave.
Collins said he's been told his house and others sit on the former site of a cemetery that was part of Lazearville, a community that was incorporated into Wellsburg years ago.
He said he and members of area groups interested in paranormal activity have shot photos and videos of ghost-like figures that have appeared in the house.
On one occasion a visiting nephew reported seeing a man in the laundry room, he said. Collins said he didn't see the man but took a photo anyway.
When he downloaded the digital picture, the outline of a figure, with dark spots that appear to be eyes and a nose, appeared.
As a fan of shows involving the supernatural, his nephew suggested he approach a local group of paranormal investigators.
A few have since been to the home, and one captured footage of what appears to be two figures speaking to each other, with one referring to the other as Lucy.
Collins said when he saw a request for stories from "My Ghost Story" on television, he decided to contact the show's producers, Mark Phillips Philms and Television of Los Angeles.
At the company's request, he sent photos and information early this year. By June, he was flying to Los Angeles to be interviewed at a television studio.
Collins said he was a little nervous about being filmed but the crews were very patient as he repeated his experiences when needed.
Last week a filmmaker from the company visited him in Wellsburg to videotape Collins relating his experiences in various areas of his home. Members of Paranormal Haven and Demonology of Weirton assisted him in recreating some of the strange incidents, he said.
Asked if anything odd happened during filming, Collins said they were in the kitchen when they heard a knock at the door. When the filmmaker looked around outside, he found nothing, Collins said.
He added a cabinet door also appeared to open by itself and footsteps were heard in the basement.
Asked if he was paid by the company, Collins said the company paid for his flight to Los Angeles and lodging and food while there but not for telling his story.
Asked if he's considered moving from the house, Collins said he's not able to because it was used as collateral on a loan that hasn't been paid off.
(Scott can be contacted at firstname.lastname@example.com)


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AbstractObjects that glow in the dark hold a special place in the imagination of both children and adults. The lights go out at night, but these odd things refuse to disappear. Where does the light come from? Do they work in any climate? In this science fair project, you will build an electronic device that measures the light given off by luminescent materials. The device will be used to study how temperature affects luminescence.
Build a device to measure the intensity and duration of light produced by glow sticks and other glow-in-the-dark materials. Determine how temperature affects the intensity and duration of luminescence.
David Whyte, PhD, Science Buddies
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Last edit date: 2015-10-24
Helium balloons, soap bubbles, and glow-in-the-dark objects seem to defy the rules that govern most everyday things. In the case of bubbles and balloons, they go up, but float around before coming back down. And glow-in-the-dark objects produce light without an apparent source of energy. This science fair project focuses on two types of glow-in-the-dark phenomena: phosphorescence and chemiluminescence.
Phosphorescent objects don't use batteries to glow. In fact, they behave like batteries themselves—you "charge" them up with light, and they then provide a steady source of light for hours after. The basis for this afterglow is the unique way that the molecules in phosphorescent materials react to light. Chemiluminescent objects, such as glow sticks, use chemical energy to produce light.
When you shine a light on an object, such as a glow-in-the-dark toy, you are bombarding it with photons. Photons are what light is made of—small packets of energy that have zero mass and travel at the speed of light. When a stream of photons collides with a solid material, the photons interact with the electrons in the material. Electrons that absorb photons move to a higher energy level. Eventually, the electrons return to the lower "normal" energy level, called the ground state. When the electrons moves to the ground state, the energy stored in each electron is released as a photon (light).
If an object absorbs all of the colors in a stream of light except red, then red light bounces off of the object and you see it as red. The interplay of photons with electrons determines which colors are absorbed and which are not. For most objects, the interactions between the photons and the electrons cease when the light stream is turned off. In the case of a phosphorescent material, some of the electrons that interacted with the photons become trapped in a meta-stable state. These electrons have absorbed energy from the photons, which moves them into a higher energy state, but they are not able to release the energy right away. The term meta-stable implies that they are in a precarious situation —they could be knocked back down to their normal energy level with just a little jostling. An electron in a meta-stable state is like a Frisbee or a ball caught in the branches of a tree—it is temporarily resisting the pull to a lower state, but a little shaking will bring it back down.
In the case of an electron in a meta-stable state, in a phosphorescent material, the "shaking" is caused by heat. The higher the temperature of the object is, the more energetic the motion of the molecules in the object will be. The molecules can bump into each other, and if a meta-stable electron is bumped just right, it will fall back to its normal energy level. The electron might stay in its meta-stable state for seconds, hours, or even days, but on average, the length of the meta-stable state decreases at higher temperatures. When the electron is eventually jostled down from its meta-stable state, it gives up the energy it possessed as a photon. The glow you see in a phosphorescent object is due to the release of energy, as photons from meta-stable electrons return to a lower energy level.
Chemiluminescence also produces glow-in-the-dark "magic," but by a different mechanism than that of phosphorescence. When you twist or bend a glow stick, you start a chemical reaction. One of the products of the reaction is light. There are three components of a glow stick: a solution of hydrogen peroxide, a solution of a phenyl oxalate ester, and a fluorescent dye. The basic premise of the reaction is that the reaction between the two chemicals releases enough energy to excite the electrons in the fluorescent dye. This causes the electrons to jump to a higher energy level and then fall back down and release light. Depending on the chemicals used, a variety of different colors can be produced.
Although you could try to do a science fair project by just looking at the glowing material, it is hard to get good numbers that describe the results using visual methods—accuracy and measurable results in experimentation is important. The Experimental Procedure, below, describes a device that will allow you to measure the amount of light that is given off by luminescent objects. You will use a solderless breadboard to build a circuit that acts as a light detector.
The circuit you will make is basic, with the key component being a photoresistor. A resistor, as its name suggests, inhibits the flow of electrons in a circuit. The level of resistance is measured in ohms (Ω), and it is usually a fixed quantity. In a photoresistor, the level of resistance is altered by light. As the intensity of light increases, the resistance in the photoresistor decreases. This is handy if you want to measure the level of light. With a simple circuit containing a photoresistor and a battery, the amount of light can be measured by tracking changes in voltage.
To isolate the luminescent material from the light in the room, the Experimental Procedure calls for it to be placed in or on (for paper) a glass jar, and then covering the jar with tin foil. The photoresistor is placed in a hole in the jar top and covered with black tape to block the surrounding light. This setup allows you to explore various materials and variables, such as time and temperature. Although the circuit is fairly straightforward, this is a DIY ("do-it-yourself") project that will call for some creative problem solving on your part. But once you have it worked out, you can describe, with precise numbers, what you see when you are looking at glow-in-the-dark objects.
Terms and Concepts
- Phosphorescence
- Chemiluminescence
- Photon
- Electron
- Energy level
- Ground state
- Meta-stable state
- Photo-resistor
- Resistor
- Resistance
- Ohm
- Voltage drop
- Potentiometer
- What kinds of chemicals or minerals are phosphorescent?
- What are some similarities and differences between chemiluminescence and phosphorescence?
- How would you expect temperature to affect the length of time a phosphorescent object glows after being exposed to light?
- What will happen if you put a glow stick in hot water? In other words, how does increased heat affect the rate of a chemical reaction, such as the one in a glow stick? Hint: Look up the Arrhenius equation.
- How does a photoresistor work?
- The circuit for this science fair project measures voltage changes caused by changes in resistance. How are voltage and resistance related to each other? Hint: What do the terms in the equation V=IR stand for?
- Helmenstine, A.M., Ph.D. (2008). How Do Lightsticks Work? Retrieved November 4, 2008, from http://chemistry.about.com/od/howthingsworkfaqs/a/howlightsticks.htm
- Schmidt, W. (2008). Super-bright glow-in-the-dark paints. Retrieved November 3, 2008, from http://www.waynesthisandthat.com/glow.htm
- Glow, Inc. (2008). Glow! Retrieved November 3, 2008, from http://www.glowinc.com
- Nave, R. (2008). Quantum Processes. Retrieved November 3, 2008, from http://hyperphysics.phy-astr.gsu.edu/Hbase/mod5.html
- Science Buddies Staff. (n.d.). Breadboard Tutorial. Retrieved September 25, 2015, from http://www.sciencebuddies.org/science-fair-projects/breadboard-tutorial
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Materials and Equipment
Components to build the light-sensing circuit:
- Solderless breadboard, available from Jameco Electronics.
- 9 V battery, available from Jameco Electronics.
- 9 V battery snap connector, available from Jameco Electronics.
Alligator clip leads (4).
- A 10-pack of leads is available from Jameco Electronics. You do not need all 10 leads for this project, but this option is more economical if you think you will use the leads for other projects in the future.
- A 2-pack of leads is also available from Jameco Electronics. Remember to buy 2 packs so you have 4 leads total. This option is better if you will only use the leads for this project and do not need the extras.
Jumper wires (5). You will use these to make connections on your solderless breadboard. There are several options, depending on whether you will use additional jumper wires in the future, or only need them for this project.
- If you own a pair of wire strippers, you can purchase a spool of solid-core hookup wire, available from Jameco Electronics, and cut your own jumper wires. One spool contains much more wire than you will need for this project.
- 10-pack of pre-cut 3 inch jumper wires, available from Jameco Electronics
- 70-piece assorted jumper wire kit, available from Jameco Electronics.
- 1 MΩ potentiometer, available from Jameco Electronics.
- Photoresistor, available from Jameco Electronics.
- Digital multimeter, available from Jameco Electronics.
- Glass jars with lids, 24 oz. (3 matching)
- Glow sticks (10), small enough to fit easily in the glass jar; available at most toy stores or online
- Phosphorescent paint or paper (at least 2 different types of either paper or paint); available at hobby shops, toy stores, or online from the sites listed in the Bibliography
- Tin foil
- Black electrical tape
- Drill with 1/4-inch drill bit to make a hole in the jar lid. A stiff knife will work, too.
- Flashlight, as bright as possible
- Liquid measuring cup
- Infrared thermometer; available at local home goods stores or online from retailers such as Amazon.com
- Lab notebook
- Graph paper
- Helper to record data
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Experimental Procedure
Building the Light Sensor
The first part of the experimental procedure is to build a light sensor that will allow you to measure how much light is being produced by the luminescent material. A circuit diagram and breadboard layout for the circuit are shown in Figure 1. Follow these steps to assemble the circuit. You can learn how to use a breadboard in the Science Buddies How to Use a Breadboard..
- Clip the snap connector onto the 9 V battery.
- Insert the positive (red) wire from the snap connector into the power bus on the breadboard.
- Insert the negative (black) wire from the snap connector into the ground bus on the breadboard.
- Insert the potentiometer into holes E1, E2, and E3.
- Use a jumper wire to connect hole A2 to the ground bus. This connects the middle pin of the potentiometer to ground.
- Use one alligator clip lead and one jumper wire to connect one lead of the photoresistor to the power bus on the breadboard.
- Use one alligator clip lead and one jumper wire to connect the other lead of the photoresistor to hole A1.
- Your multimeter's test probes cannot be inserted into the breadboard directly. Use alligator clips and jumper wires to connect the positive (red) lead from your multimeter to hole C1.
- Use an alligator clip lead and jumper wire to connect the negative (black) lead of your multimeter to the breadboard's ground bus.
- Make sure the black test probe is plugged into the port labeled COM, the red test probe is plugged into the port labeled VΩMA, and your multimeter is set to measure 20 VDC. If you need help using a multimeter, check out the Science Buddies How to Use a Multimeter.
- Once you have built the circuit, test it with various light levels. The multimeter's reading should change when the photoresistor is exposed to different levels of light.
Figure 1. Photoresistor light meter circuit. The circuit has a 9 V battery, a photoresistor, a potentiometer, and a digital multimeter. The resistance of the photoresistor decreases in the presence of light. The potentiometer, which has a knob that changes its resistance, is used to vary the sensitivity of the meter. In bright light, the voltage drop across the photoresistor is reduced, leading to an increase in the voltage drop across the potentiometer, which is what is measured by the multimeter.
Constructing the Light-protected Jar to Test Chemiluminescence
- The jar should be tall enough to hold the glow sticks.
- Wrap the sides of the jar in tin foil so that no light can get in.
- Seal the edges securely with electrical tape.
Constructing the Phosphorescent Material Holding Device
Depending on which method you are using, either follow step 1 or step 2, below.
If you are using phosphorescent paper:
- Trace and cut a circle out of the phosphorescent paper that is the size of the base of the jar.
- Tape the phosphorescent paper circle to the outside of another jar base.
If you are using phosphorescent paint:
- Paint the bottom of another jar with the phosphorescent paint and let it dry.
Assembling the Light Detector Top
- Put on your safety goggles and drill a hole in the center of just one of the jar lids, about 1/4 inch in diameter.
- Cover the leads of the photoresistor in electrical tape, so they do not bump into each other (or the jar lid, if it is metal) and create a short circuit. Leave a small amount of exposed metal at the ends of the leads, so you can attach alligator clips to them.
- Tape the photoresistor from the circuit over the hole in the jar top. Use black electrical tape, making sure light cannot enter the jar.
- This lid will be used on all of the jars.
You have just assembled the light meter and the "housings" for the light sources.
Figure 2. This is the experimental setup to measure luminescent light. The tin foil around the jar protects the sample from surrounding light.
Familiarizing Yourself with the Light Detector
It is important that you become very familiar with how the light detector works. Experiment with the potentiometer settings in different lighting conditions.
- Determine the voltage baseline for the jars with nothing in them and with the lid on. There should be no signal.
- The light level in the light-protected (tin-foil wrapped) jar should be the same when the jar is in a lighted room or in a dim room. If it changes, that means there is a light leak. Find the problem area and cover the light leak with electrical tape.
Testing the Effect of Increased Temperature on Chemiluminescence
Important Notes:
- The position of the glow sticks in the jar should be the same for each trial.
- Keep movement of the setup to a minimum to reduce unwanted variations.
- Work with a helper so that you can record the readouts quickly.
- Vary the times given below, if desired, to obtain further data.
- Twist a glow stick to start the reaction.
- Place the glow stick in the tin-foil wrapped jar and place the lid on.
- Watch the readout. It should go from a high level at first, and gradually to a lower level as the signal decays. Does it decrease evenly, or is it faster in the beginning? Record your observations in your lab notebook.
Adjust the sensitivity, as needed, by turning the knob on the potentiometer.
- Note: Once the sensitivity is set, don't change it during the course of the experiment or you won't be able to compare samples.
- Record the setting of the potentiometer in your lab notebook. You can do this by measuring the resistance across the top and middle (holes E1 and E2) of the potentiometer. This will require temporarily disconnecting the 9 V battery and temporarily moving the black multimeter lead on your breadboard to hole C2.
- Record the time and signal strength produced by the light of the glow stick.
- Describe how the signal changes with time. What will happen if the temperature is increased?
After 15 minutes, open the jar and add hot water to raise the temperature, as follows:
- First use the infrared thermometer to record the temperature before adding the hot water. Record all readings in your lab notebook.
- Add a 1/4 cup of hot water, should be approximately 50°C (112°F).
- Close the jar.
- Take the temperature after you've put the lid on the jar.
- Continue recording the signal strength.
Repeat steps 1–9 several times with fresh glow sticks and a new 1/4 cup of hot water (pour out the old water) until you have clear data showing the following:
- How the light signal decays with time.
- How temperature affects the light intensity.
- Graph the data.
Testing the Effect of Increased Temperature on Phosphorescence
- Use the infrared thermometer to record the temperature of the jar with phosphorescent paper or paint, at room temperature.
- Shine the flashlight on the phosphorescent material for 60 seconds.
- Put the lid on the jar with the photoresistor attached.
- Watch the readout. It should go from a high level to a lower level. Does it decrease evenly, or is it faster in the beginning?
- Repeat steps 1–4 again, but use the stopwatch to time how long it takes for the light to decrease at each level—from 10 to 9, etc.
- Use the infrared thermometer to record the temperature of the jar with phosphorescent paper or paint, at room temperature.
- Now add 1/4 cup of hot tap water, approximately 50°C (112°F), to the phosphorescent jar.
- Shine the flashlight on the phosphorescent material for 60 seconds, as before. Do not put the lid on yet.
- Measure the temperature with the infrared thermometer.
- Now put on the photoresistor lid.
- Record the light level reading and corresponding times in your lab notebook.
- Repeat steps 7–11 several times (with new hot water—pour out the old water) until you get consistent results.
- Graph the data.
- Repeat steps 1–13 with the other type of phosphorescent paper or paint.
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- Try using ice to investigate cold-temperature effects.
- Devise methods for keeping the temperature steady during the experiment.
- Build and test the super-sensitive light-sensing circuits described in the Sensorslab workbook (pages 86 and 91).
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text:
HP Cyber Monday 2012 Sale – HP Official Store (now live)
coupon code: BFCM2012
Coupon Code: BFCM2012
HP Cyber Monday is now live. Buy a computer get a free Nook. $ 10 off $ 50 with code.
Free shipping and extended returns.
5 Comments add a comment
So it says $10 off $50 - but doesn't give the code? Looks like a non sale to me. How do you get the code? I need some toner cartridges and could use this to get one.
@startanew2: The code is listed right at the top of the page: BFCM2012
They have the #1 printer listed on Consumer Reports on sale for cheaper than Amazon or any other place I can find. I'm in...needed to replace my printer and I had been watching for this model to go on sale. Thanks OP.
@rangerdoc: What model is that?
@willbroe: 7520. If you don't need a fax you can get the 7510. These are the Photosmart series, so I'm comparing inkjets that are all-in-one, which is what I want. My last HP photosmart printer has lasted forever with no problems.
Unless you print a lot- use the discounts to move into a color laser instead. If you don't print a lot, the damned ink dries out.


text:
Star of David, For Entertainment Only
It's a scene that's repeated itself year after year at two of Europe's most popular clubs. Supporters of the Dutch club Ajax call themselves the "SuperJews" and wave flags with the Star of David. Their counterparts at Tottenham Hotspur in North London adopt the moniker "Yiddos" and chant "Yid Army!" during games.
Yet the vast majority of them aren't Jewish. And neither are the clubs in any formal way.
Just why this happens is a source of some debate. Both clubs have a Jewish connection, but it's a rather tenuous one. Tottenham's stadium, White Hart Lane, is located in a neighborhood that was once predominantly Jewish, but is now decidedly multiethnic. And the club itself was founded by Anglican Sunday-school students.
Some of its fans are Jewish, but a very small proportion. It doesn't take a demographer to figure this out. A 2010 survey by the German research firm "Sport+Markt" estimated the number of Tottenham fans at 3.5 million. According to census data, there are some 275,000 Jews in the United Kingdom and, obviously, not all of them are Tottenham fans or have any interest in soccer at all. The club's majority owner, Joe Lewis, is Jewish, but then so are the owners of other Premier League clubs like Manchester United, Chelsea, Aston Villa and West Ham. Plus, past Tottenham owners have been gentiles.
Ajax was set up as a secular club and named for Achilles's cousin in "The Iliad." The team crest features his likeness. Its ties come from the fact that its old stadium, De Meer, stood in one of Amsterdam's Jewish neighborhoods. Yet, as the author Simon Kuper points out in his book "Ajax, the Dutch, the War," roughly three quarters of Holland's Jews died in the Holocaust and, by the 1950s, De Meer ceased to have many Jewish connotations. And yet, particularly in the 1970s, this identity was rekindled by supporters, the overwhelming majority of them not Jewish.
Why this desire to adopt Jewish symbols as a means of cheering on your team?
Most likely, it's a desire for tribalism. You want your team to be different and special, and given Europe's history, such symbols are a convenient (and some would say lazy) shortcut. And given soccer's sense of history and tradition, once established, it isn't something that's easily going to be shed.
Not that there haven't been attempts to do so. In 2005, Ajax made a concerted effort to try to distance itself from the Jewish image. (Among other things, it stopped making a "Hava Nagila" ringtone available for download on its website.) Why? Because the quasi-cultural identification had been adopted by its hooligans, some of whom draped themselves in Jewish symbols when fighting with other fans or the police. What's more, whenever Ajax faced teams with supporters with far-right tendencies, it faced a barrage of anti-Semitic abuse, including chants of "Hamas! Hamas!" and hissing meant to emulate gas chambers. The club's campaign had limited success.
Now, Tottenham is in the spotlight thanks to the efforts of a campaigning lawyer named Peter Herbert, who last week called on Tottenham fans to stop using the word "Yid," which historically was used as an ethnic slur in Britain.
"What we are trying to do is change a culture," he told the BBC. "Even if it comes from Tottenham supporters, it remains casual racism."
Herbert has set a deadline of Nov. 20 and, if by that date the chants don't cease, he will report fans to the police. Under British law, all such race-related complaints must be investigated by law enforcement.
But the club is siding with its supporters.
"Our fans adopted the chant as a defense mechanism in order to own the term and thereby deflect anti-Semitic abuse," a statement released by Tottenham reads. "Our guiding principle in respect of the 'Y-word' is based on the point of law itself—the distinguishing factor is the intent with which it is used, i.e. if it is used with the deliberate intention to cause offense. [Our fans] do not use the term to others to cause any offense, they use it as a chant among themselves."
It's an echo of the classic debate over some people reclaiming insulting words by using them to refer to themselves. As with age-old derogatory terms used among African-Americans and "queer" in the gay community, opinion is polarized. The twist here is that many of those looking to defuse the impact of a slur against a minority community by using that term in public aren't themselves members of that community. Furthermore, to the more xenophobic and anti-Semitic opposition fans, all of this is the classic red rag to a bull. You can easily argue that if non-Jewish supporters didn't drape themselves in these symbols they would not generate the kind of anti-Semitic abuse that offends most everyone but probably Jews most of all.
What's left is the opening of a whole new can of ethical and legal worms of the kind that soccer would really rather not debate because, whatever the outcome, somebody is bound to be offended.
— Gabriele Marcotti is the world soccer columnist for the Times of London and a regular broadcaster for the BBC.


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I've heard that red clothing is forbidden for women to wear because it's immodest. Some recent psych research confirmed that men are more attracted to women in red. So that means it's prohibited, right?
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I recall reading the study in question and it is significant in that the color red did not effect how the male perceived the female's other traits such as intelligence or kindness but only his, shall we say, interest in her. Although it is not clear based on this study whether this tendency is the result of biological factors, cultural factors, or both, it strongly suggests that the color red does have a certain effect even in contemporary society which may not be particularly welcome from the standpoint of tznius (modesty).
While others have noted that there are authorities who are lenient with respect to wearing the color red, it should be recognized that the Rema in Yoreh Dea 178:1 writes that: "Rather one should be distinct [from non-Jews] in his dress and in his other ways, but all of this isn't prohibited unless it is done by non-Jews for reasons of immodesty, for example they are accustomed to wearing red clothes" To this the Sifsei Cohen (Shach 178:3) adds, "since it is not the way of the modest to have red in their clothes" (transl. mine, sorry for any imperfection).
Rav Moshe Feinstein zt'l (Igros Moshe Y.D. 1:81) rules that red clothing do not constitute a transgression of the prohibition against chukkas hagoy (non-Jewish customs) in contemporary society but describes them as having a tinge of immodesty (pritzus) and there is no explicit (nor I believe implicit) licence given to wear them. Indeed he explicitly states that the among the clothing he mentioned as not being prohibited due to chukkas hagoy there are those which are prohibited do to immodesty. Insofar as he closes with the statement that such a consideration (immodesty without the problem of non-Jewish clothing) is not relevant to men, it would seem that red clothing would be at the forefront of types of "immodest" clothing he referred to (i.e. those conceivably worn by men).
According to Rav Wosner shlita the prohibition against wearing red is still applicable, and that one is obligated to educate older children to abstain from wearing red clothing ( Shevet HaLevi 6:24:2). According to Rav Elyashiv shlita this prohibition is also in effect, albeit only with respect to bright red (I don't believe that there is a disagreement about this, nor that there are other colors which the prohibition does apply to). The Be'er Moshe 4:147:13 also applies the prohibition to contemporary times. It is related in the name of Rav Yaakov Kaminetzky zt'l that it is permitted to wear red but it is preferable not to.
It would seem that according to Rav Shlomo Zalman Aurbach zt"l that red is prohibited, but that it is permitted when it is an incidental accent to the garment.
Since we see that, in fact, there appears even in contemporary times a statistically significance increase in less-than-modest association with the color red I'm inclined to believe one should not be quick to dismiss the explicit words of these (and other) Gedolei haPoskim. I would add, however, that while the study may not have revealed any similar perception by women viewing men in red (though I don't believe it addressed that question)
There are traditional sources (e.g. the Talmud discusses shoelaces) that yes, red is flashier and perhaps more attractive. That doesn't mean it's prohibited.
If you look up "red clothing" in the index to the Igrot Moshe, you'll find the following discussion by Rabbi Moshe Feinstein:
A style of clothing can be prohibited if it's just plain inappropriate. Another way a style of clothing can be prohibited is if this is a "non-Jewish" style, i.e. Jewish women have abstained from wearing it until now, AND this style is somewhat flashier, for instance it's red.
Writing in 1953, Rabbi Feinstein feels that the latter point is moot, as he is not aware of any clearly "non-Jewish" clothing styles in America; most American clothing (provided it's appropriate) is also "American Jewish" clothing.
In "Contemporary Tzniut", Rabbi Yehuda Herzl Henkin argues that just because clothing is attractive doesn't make it prohibited. See Rashi's commentary on Genesis 49:11: "And colorful clothing" is expressed by the word סוּתֹה, [a garment] a woman wears to entice [מְסִיתָה] a male to cast his eyes on her." This description appears as part of a Biblical blessing, and we don't see it prohibited.
The discussion above re: prohibition due to the ways of the non-Jews is one issue. However, "Tzenius" is not just about legal prohibitions. It is a "Midda Tova" and it is a lauded character trait among Jews. It was described by Bila'am in his praise for Israel, and Rashi mentions it as a "worthy practice" a few places (e.g. Sanhedrin end of seventh chapter), not rising to the level of a full Mitzva, but nevertheless a mitzva. The Sma"k (57) considers it a full mitzva. A verse in Tenach (Micha 6) is one of the sources for this as well:
Tzenius in this sense is the practice of not calling attention to oneself, but rather operating discreetly, and it applies to man and woman alike. For a woman, wearing red, or skirts with slits, or anything that draws a man's attention, would not be considered "tzniusdik" by this definition.
If a clothe has only a little red on it is Mutar according to everyone and also a clothe which isn't really red like pink is Mutar. And nowadys there a Posekim that are Matir to wear and those who are Mekil have upon whom to rely.
Just adding some Talmudic sources around which most of this debate centers. In Berachot 20a, when discussing the amazing levels of self-sacrifice to be found in generations previous to them, the Gemara relates, "Rav Ada bar Ahava saw this non-Jewess that was wearing a carbalata in the market. He thought that she was a Daughter of Israel, [so] he arose and tore it from her. It became revealed that she was a non-Jewess, and they assessed [his requirement to compensate] it at 400 zuz. He said to her, 'What is your name?' She said to him, "Matun!" He said to her, 'Matun? Matun is worth 400 zuz!'" (Rashi explains this final pun in 2 ways. Either he's referring to Ma'atan, Aramaic for the number 200, so he's saying "Ma'atan plus Ma'atan is worth 400 zuz!" Alternately, he's referring to metinut, the patient investigation he had not done, so he's saying "Patience? Learning patience is worth 400 zuz!")
Carbalata is the same word used for a rooster's comb. Rashi translates it in context as "the name of an expensive garment". The Aruch in his dictionary says, "A red article of clothes, like the comb of a rooster, for it is not the normal way of Daughters of Israel to clothe themselves with it, for it is pritzut (immodesty) and leads to sinful acts." (Pritzut has a connotation of poretz geder, breaking through societal mores - hence, immodesty.)
So, carbalata is either an article of clothes that's red as a rooster's comb (Aruch), or one that helps you strut like a rooster (Rashi)...
At the very bottom of Sanhedrin 74a, the Talmud discusses the requirement to give your life in sanctification of G-d's Name. It states that if a) it is a time of anti-Judaic governmental decrees, or b) if it's a public demand to capitulate, "even on a mitzva kala ("light" mitzvah), one should allow himself to be killed rather than transgress. The Talmud then asks "What is a mitzva kala?", to which it responds on the top of 74b, "Even to change the laces of sandals!"
Rashi explains, "...if it is the way of the idol worshipers to tie the laces so, and the way of Jews in a different way - for example, when there is a Judaic aspect to it, and it is the way of Israel to be modest people - even this change, when there is no mitzva but just a general custom, he should sanctify The Name before his Jewish peers..." Nothing about red, but a general mention of modesty. In Tosafot, Rabbeinu Tam opines that Jews wore white shoelaces while all others wore black. Again, no red. However, many other Rishonim & Acharonim do specifically reference red (see Hagahot Maimoniyot on Yesodei HaTorah 5:2).
For example, Kitzur Shulchan Aruch (Code of Jewish Law, Ganzfried) says in 3:2, "We don't walk in the statutes of the idol worshippers, nor do we imitate them, not in dress nor in hairstyles and similar things... He should not wear clothing that is specific to them for haughtiness... As an example, this that the Talmud says (San. 74b) that it is prohibited for a Jew to imitate them even with shoelaces, for it was their way to tie like so & the way of Israel in a different way, OR (capitalization mine, RR) that their custom was to have red laces and those of Jews were black, for the color black demonstrates humility and humbleness and modesty, [so] it is prohibited for a Jew to change. And from this each person should learn, ACCORDING TO HIS TIME AND PLACE..."
So, KSA hedged his bets: He mentioned Rashi's "it was their way to tie like so", other Rishonim's red vs. black (which sounds like the effects of red & black are an OBJECTIVE reality), then says that it depends on the time and place (which sounds like immodesty is SUBJECTIVE). Left open is our question: Is red objective while many (most?) other forms of immodesty are subjective, or are they ALL subjective?
Do colors still affect us? This study says it does, though we don't know how the results would change if these colors were worn by the other person rather than painted on the wall.
Parenthetically, an ex-TSA agent just admitted that they had special codes for attractive female passengers, with red & yellow clothes getting special mention. Just sayin'...
on a mystical level not only women but anyone is not not reccomended to wear red, it means dinim


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Atiyah in his famous paper , Characters and cohomology of finite groups, after proving completion of representation ring in augmentation ideal is the same as $ K(BG)$, gives bunch of corollaries of this main theorem. One of them that catches my interest is: For any finite non-trivial group $G$ there exists arbitrary large integer $n$ such that $H^n(G,\mathbb{Z})\neq 0 $. I just wonder if anyone can prove this without this powerful theorem.
Let $G \to GL_N (C)$ be the regular representation. Pick a nontrivial subgroup $Z/p \subset G$ for a prime $p$ and consider the composition $Z/p \to GL_N(C)$, inducing $BZ/p \to BGL_N (C)$. If we can show that this map is nonzero in arbitrarily high cohomological degree, the theorem is proven. Let $L_k$ be the $1$-dim representation of $Z/p$ with the generator acting by $e^{2 \pi i k/ p}$. The restriction of the regular representation of $G$ to $Z/p$ is a multiple (say $m$ times) of the sum
$$L_0 \oplus L_1 \ldots \oplus L_{p-1}.$$
Let $x \in H^2 (Z/p)$ be the first Chern class of $L_1$; this is a generator. Since $L_i$ is the $i$th tensor power of $L_1$, the total Chern class of $L_i$ is $1+ix$. Therefore, the total Chern class of the regular representation on $Z/p$ is
$$((1+x)(1+2x) \ldots 1+(p-1)x))^m.$$
In particular, the $m(p-1)$st Chern class is
$$z=\prod_{k=1}^{p-1} k^m x^{m(p-1)} \neq 0,$$
the latter because $p$ is a prime. Because $H^{\ast} (Z/p; Z) = Z[x]/(px)$, all powers of $z$ are nonzero. Therefore: write $|G|=pm$, $p$ prime. Then $H^{2 m (p-1)k } (G) \neq 0$ for all $k\geq 1$.
Yes, Richard Swan is the first to prove it, The Nontriviality of the Restriction Map in the Cohomology of Groups (1959):
The restriction $res^G_H:H^i(G)\rightarrow H^i(H)$ is nonzero for an infinite number of values of $i>0$.
As a corollary, for any prime $p$ dividing $|G|$, the $p$-primary component $H^i(G)_{(p)}$ is nonzero for an infinite number of values of $i>0$.
He actually proves this in a more general case, where $G$ is a compact Lie group and $H$ is a closed subgroup (defining group cohomology with the classifying spaces $BG$ and $BH$). The proof uses basic cohomological and Lie group principles.
The first purely algebraic proof of this fact seems to be from Leonard Evens:
where he proves the result with help of his norm map. After having established the basic properties of the norm map, the proof is rather elementary: Let $C$ be a cyclic subgroup of prime order of $G$ and let $x$ be a generator of $H^2(C,\mathbb{Z})$. Then the powers of $y = N^G_C(x)$ yield non-trivial cohomology classes of $H^*(G,\mathbb{Z})$ in degrees divisible by $(G:C)$.
From a historical point of view the norm map already occured in disguise in Evens´ paper
where he proves finte generation of the cohomology ring.
One way is to use another powerful theorem :)
For example, one knows from a result of Dan Quillen that the Krull dimension of the cohomology ring with coefficients in a field with bad characteristic is the same thing as the $p$-rank of the group, that is, the maximal rank of an elementary abelian $p$-subgroup. This is nicely explained in Dave Benson's Representations and cohomology, vol. II, and is proved in [Quillen, Daniel. The spectrum of an equivariant cohomology ring. I, II. Ann. of Math. (2) 94 (1971), 549--572; ibid. (2) 94 (1971), 573--602. MR0298694 (45 #7743)]
It follows that for some prime $p$, the Krull dimension of $H^\bullet(G,\mathbb F_p)$ is positive, so it cannot vanish for $\bullet\gg0$, and then the same thing holds with integer coefficients. Indeed, this shows there are infinitely many non-zero degrees, answering Ryan's question in the comments to the main question.


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I'm trying to add my parser.m file to the target of my unit test (or, of my unit test file?), but I have no idea how.
Here's an example of a page that indicates the necessity of using the target:
Undefined symbols for architecture i386 "_OBJC_CLASS_$_Appirater"
...and here's part of an answer from that page:
I think, that you only added files to project, but not to target. Click on Appirater.m file in Project Navigator and set checkbox near to your target name in Target membership of File Inspector.
What I don't get from that answer is, "what checkbox?". Also, how do I know my target name? Where do I find 'Target membership'?