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Click on the artist's name to see a gallery of their artwork.
Maggie Breschi is 22 years old and lives in Timonium, MD with her friend Megan. Both Maggie and Megan have developmental disabilities and are supported by wonderful staff through Richcroft, Inc. Maggie attends The Arc Baltimore Dundalk Center where she has the opportunity to work and engage in a variety of activities. In addition to her work, Maggie loves spending time with her family and friends. She enjoys racing on the NCR Trail with Athletes Serving Athletes, and visiting her Aunt's horse farm, listening to audio books, going to camp, arts & crafts and just hanging out in her condo.
I was born and raised in Howard County, Maryland. I'm less than a month from being 17 years old. Art, music, nature and gaming are all things I've always enjoyed and those are the main things that bring out my creativity. My top goal within the next year is to successfully graduate from high school on time with my class. After I graduate I am going to be looking into small jobs involving music, writing or art. My family and pets mean the world to me. They never fail to cheer me up through hard times or just make me happy in general.
Athena Storm is a 7 year old digital media artist from Owings Mills, Maryland. She has Quadriplegic Cerebral Palsy and uses eyegaze as her primary mode of communication. Athena has always made a study of her environment and expresses her unconventional impressions of her surroundings through her art. There was a wealth of talent and information trapped inside Athena, now that technology has caught up with her she is able to express herself digitally.


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Who are "We"?
In this policy, whenever you see "We", "Us", or "Our" it refers to Open Square Limited.
Open Square Limited is a limited company registered in England & Wales, registered number 11070987. The company's registered office address is: St Mary's House, Netherhampton, Salisbury, Wiltshire, SP2 8PU. We provide training, leadership consultancy and coaching services. Our website is www.opensquareconsulting.com
We take your privacy seriously. This policy sets out what information We collect about you when you visit Our website and/or use Our services, and how We handle your information to ensure We protect your rights.
Your acceptance of this policy, and Our right to change it
By using Our websites, social media pages or providing your personal information you consent to Our collection of and use of the information you provide in the ways set out in this policy. If you do not agree to Our policy, please do not use Our websites, social media pages or associated services.
We may make changes to this policy from time to time. If We do, We will post the changes on this page and they will apply from the time We post them.
What is personal data?
Personal data is information that can be used to identify an individual, such as their name, address, phone number, email address or IP address. More information about what kind of information is classified as personal data can be found here https://ico.org.uk/for-organisations/guide-to-data-protection/guide-to-the-general-data-protection-regulation-gdpr/key-definitions/what-is-personal-data/
The policy in brief
It's important that you read the full policy to understand what information We hold, how We may use it and what your rights are. Here is a summary of the policy if you don't have time to read it fully now:
- We collect data that is either personal data (as described above) or non-personal data, such as website pages that have been accessed.
- We collect information about people who visit Our website, or who use Our services or have expressed an interest in Our services.
- We only collect information that We need to provide Our services, to provide information, for administration, research, analysis and to improve Our services.
- We will keep your personal data securely at all times.
- We will never sell your data and We never share it with a third party to use for their own purposes
- We may share your data with carefully selected third parties which undertake work on Our behalf, or where We are required to share your data by Law.
- Our website uses cookies – for more information check Our cookies policy at the bottom of this page
The Full Policy
This policy applies to the website We operate, Our use of emails, phone and text messages for marketing purposes and for any other methods We use for collecting information. It covers what We collect, and why, what We do with this information, what We don't do with this information, and the rights you have.
What information do We collect and why?
We only collect your personal information that you have voluntarily chosen to provide to Us, and We will only collect personal information that We need, including information that will help Us to improve Our services.
We collect two kinds of information:
- Non-personal data such as the web pages that have been accessed and files that have been downloaded. This helps Us understand how many people use Our sites, how many people visit on a regular basis, and how popular Our pages are. This information allows Us to monitor and improve Our services.
- Personal data such as name, postal address, phone number, email address and IP address, and information about your interest and/or provision of Our services to Our clients (and prospective clients)
What do We do with this information?
We will use the information you provide to Us to:
- Fulfil your requests – such as providing information about Our services or communicating with you, as well as managing the day-to-day of Our business
- Record any contact We have with you
- Prevent or detect any abuses of Our websites and to enable third parties to carry out technical or other functions on Our behalf
- Help Us to gain a better understanding of Our customers and users to enable Us to improve
- Occasionally We share insights with clients (and prospective clients) to promote Our ideas and expertise
- Communicate with Our customers and users, gather feedback on Our services from clients, maintain relationships with clients (and prospective) clients, and conduct the day-to-day operations of Our business (i.e. processing client invoices)
- If you have agreed to it, provide information that We think may be of interest to you
- We monitor the number of visits to the pages of Our website. This allows Us to understand whether Our website is providing helpful information to prospective clients. The analytics do not identify an individual.
- We do not purchase or obtain any supplemental personal information about you from any third parties. We do not obtain, store or process special category personal data.
- We will periodically check the personal data We store, to ensure is accurate and up-to-date.
- When visitors leave comments on the site, We collect the data shown in the comments form, and also the visitor's IP address and browser user agent string to help spam detection.
- An anonymised string created from your email address (also called a hash) may be provided to the Gravatar service to see if you are using it. The Gravatar service privacy policy is available here: https://automattic.com/privacy. After approval of your comment, your profile picture is visible to the public in the context of your comment.
Third-Party Websites
- Our website contains links to third-party websites that We believe may be of interest to Our website visitors and customers. This privacy policy only governs Our websites and portals and We are not responsible for the privacy policies that govern third-party websites even where We have provided links to them. If you use any link on Our website, We recommend you read the privacy policy of that website before sharing any personal or financial data.
Social Media Sites
We operate a number of social media pages (including Facebook, Twitter, and Instagram). Although this policy covers how We will use any data collected from those pages it does not cover how the providers of social media websites themselves will use your information. Please ensure you read the applicable privacy policy of the social media website before sharing data and make informed use of the privacy settings and reporting mechanisms to control how your data is used and its visibility.
If you upload images to the website, you should avoid uploading images with embedded location data (EXIF GPS) included. Visitors to the website can download and extract any location data from images on the website.
If you leave a comment on Our site you may opt-in to saving your name, email address and website in cookies. These are for your convenience so that you do not have to fill in your details again when you leave another comment. These cookies will last for one year.
If you have an account and you log in to this site, We will set a temporary cookie to determine if your browser accepts cookies. This cookie contains no personal data and is discarded when you close your browser.
When you log in, We will also set up several cookies to save your login information and your screen display choices. Login cookies last for two days, and screen options cookies last for a year. If you select "Remember Me", your login will persist for two weeks. If you log out of your account, the login cookies will be removed.
Disabling Cookies
You can manage Cookies by changing your browser settings to block or delete Cookies (www.allaboutcookies.org). Disabling Cookies can affect the functionality of this and other websites you visit. Disabling Cookies will usually result in also disabling certain functionality and features of this site. Therefore, it is recommended that you do not disable Cookies.
The Cookies We set
We use Cookies that are necessary for the website to function. They are only set in response to actions made by you i.e. completing Our contact form.
Third Party Cookies
Our site uses Google Analytics which is one of the most widespread and trusted analytics solutions on the web for helping Us to understand how you use the site and ways that We can improve your experience. These cookies track how long you spend on the site and the pages that you visit so We can continue to produce engaging content. For more information on Google Analytics cookies, see the official Google Analytics page. The Google Analytics software will not store, save or collect personal information.
Embedded content from other websites
Articles on this site may include embedded content (e.g. videos, images, articles, etc.). Embedded content from other websites behaves in the exact same way as if the visitor has visited the other website.
These websites may collect data about you, use cookies, embed additional third-party tracking, and monitor your interaction with that embedded content, including tracking your interaction with the embedded content if you have an account and are logged in to that website.
How long We retain your data
If you leave a comment, the comment and its metadata are retained indefinitely. This is so We can recognise and approve any follow-up comments automatically instead of holding them in a moderation queue.
For users that register on Our website (if any), We also store the personal information they provide in their user profile. All users can see, edit, or delete their personal information at any time (except they cannot change their username). Website administrators can also see and edit that information.
What rights you have over your data
If you have an account on this site, or have left comments, you can request to receive an exported file of the personal data We hold about you, including any data you have provided to Us. You can also request that We erase any personal data We hold about you. This does not include any data We are obliged to keep for administrative, legal, or security purposes.
Where We send your data
Visitor comments may be checked through an automated spam detection service.
What We don't do with your information
We will never sell or share your information to other organisations to use for their own purposes.
Your Rights
The Data Protection Act 2018 gives you certain rights over your data and how We use it. These include:
- the right to be told what personal data We hold about you, and why, and a right to a copy of that information
- the right in certain circumstances to have inaccurate or incomplete personal data rectified, blocked, erased or destroyed
- the right to prevent your data being used for direct marketing purposes
- The right to withdraw your consent to Us storing and processing your personal data
- The right to have your data returned to you in a common, useable format
If you wish to exercise any of these rights please contact Us in writing at Open Square Limited, St Mary's House, Netherhampton, Salisbury, Wiltshire, SP2 8PU or by emailing email@example.com
If you want to know more about your rights, or you have exercised your rights and are unhappy with Our response you can contact the Information Commissioner's Office.

subset: commoncrawl


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Serving We have a strong customer service team serving for our every customer with our sincere desire, our intendment,our patience!
Shipping We ship to over 200 countries worldwide through fast and reliable delivery partners.
Packaging We will strictly check every package. Sometimes we use double packagingThus, your products from our online store are well protected and not harmed.
UA Curry 4 White Grey$89.00
UA Curry 4 Green Grey$89.00
Curry 4 Golden Rainbow$89.00
Curry 4 Shoes High Black Christmas Black$89.00
Curry 4 Aqua Green$89.00
UA Curry 4 Black White$89.00
Curry 4 Shoes Low White Blue$89.00
Curry 4 Shoes High Black Red$89.00


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Epson, the name is in itself the brand name popular for its print manufacturing. It is one of the renowned printer brands that render laser- quality, premium-quality prints for heavy duty and high-end performance. This is the multi-purpose printer by Epson's Precision Core printing technology. It is specially designed to proffer better performance beyond the range of lasers. This printer is in high demand as it helps to produce superior quality color prints and laser shop prints. Besides, the user is also saving on ink by also diminishing the cost up to 50 percent in comparison to the color laser. This type of printer also aids in printing in Smartphone & tablets. But the installation of Epson WF 4630 driver is not that easy to install as it needs the expertise to do so.
A number of features are present in this type of printer which comprises attributives like 3.5 inches color of the touch screen, automatic document feeder, scan, copy, auto-2 sided print features and others. If you're unable to follow the steps of installation, then you can seek the assistance of Epson customer service team for resolution. They will guide you through the effective steps following which you can install the Epson WF 4630 driver.
Unleashing the distinct features of Epson WF 4630
- This printing technology consumes less than 70% power as compared to laser printers.
- The user can get wireless as well as Wi-Fi direct.
- This printer tech conveys effortless navigation along with the 3.5-inch touch screen.
- The output is an agile printing, the ISO which is 20 ISO ppm (color) and 20 ISO ppm (black).
- Due to its reliability and high-end results, it is largely used in the professional industry.
- The absolute Epson connect enables sharing and printing files from anywhere.
- The print resolution can be extended to the maximum 4800X1200 dpi.
Effective ways to fix common problems in Epson WF 4630 printer
When the red light blinks
Just as all other Epson printers, Epson WF 4630 printers come in a combination with an ink-level warning system and Epson WF 4630 drivers. The framework cautions a client when the dimension of ink in the printer goes down. The framework essentially depends on the quantity of pages printer to discover the ink level as it is modified to work as indicated by an ink tank equipped for delivering 4000 pages.
At the point when the check level draws nearer to the 4000 stamps, the printer begins accepting that the ink level has gone basic and accordingly cautions you by squinting red light ceaselessly and afterward halting to work by any means. Thus, while the greater part of us thinks about it as an issue, it is really a notice ready which can be cleared by expelling the ink tanks from the printer while the light continues flickering.
Errors present in cartridge recognition
In order to make the printer work for a long period of time, Epson installs their printer with special IC that hinders from installation. This also restricts the use of third-party ink cartridges by not identifying them. With a view to solving this error, you can restart your printer by simply making it turn OFF. This also assists in clearing out the messages. But even after doing this, the error persists then eliminates the non-authentic ink cartridges. In their place, keep in Epson recommended genuine parts along with Epson WF 4630 Driver.
Are you unable to perform the above-mentioned functions? Then connect with our Epson printer support team for resolution. They will guide you through the efficient process of resolution.
The significance of Epson of 4630 drivers in Epson
Epson printer drivers are a very essential print processor in printers for various printing purposes. The Epson WF 4630 driver helps to convert the data to be printed to the understandable format by the printer. They enable applications to execute the printing process sans being aware of the technical details of each printer model.
The Epson WF 4630 printer is an amazing printer that assists you to print documents as well as photos beautifully. You don't should be concerned in the event that you are coming up short on ink since Epson wf-4630 ink/toner cartridge is anything but difficult to discover alongside reasonable cost. In this way, on the off chance that you need to use your new Epson WF Pro WF-4630 printer straight away, make a point to download the good Epson WF 4630 drivers and programming. The printer drivers play a pivotal role in the Epson printers. It helps in the smooth functioning of the printers in doing their actions.
The final dictum
People come across various problems resulting from Epson WF 4630 driver and printers. But you can solve it with proficiency if you had that technical knowledge. Now, it becomes difficult for normal users who fail to resolve them. At this point, feel free to acquire the assistance of Epson support team for a quality solution.


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Begin by cutting 15 inches from each dowel with a hacksaw. This will give you four 33-inch spars and four 15-inch spars. Next make eight spar pockets by cutting the copier paper into 1 1/2-inch strips (lengthwise). Then fold each sheet into thirds and then in half. Staple the sides of each pocket as shown in the spar pocket drawing. These pockets must be taped about six inches from either end of the 33-inch spars. Simply wrap the packing tape around each spar and the pocket leaving the mouth open. Be sure that each pocket taped to a spar is taped facing the same direction.
Now for the tricky part. Lay your sheets of sail out on the floor (or some other flat and clean surface). With your pencil, mark a line every 11 inches starting at one end and going to the other. There should be an inch or two of extra sail at one end. Line up the sails horizontally one above the other and space them so that the top of one sail is 33 inches from the bottom of the bottom sail. Now lay out the 33-inch dowels on top your marks beginning on one edge.
Lastly, you will want to make a tail. Tails, for some reason seem to be a very personal aspect of kite design. You can use a string with ribbons tied to it, or construct one from paper. For our test kite we used a chain tail which can be very ea silly made from strips of newspaper cut about a foot in length and chained together. This kite very much needs a tail, and it can be secured to the base of the kite with our ubiquitous packing tape.
Check out our own test flight of the box kite design.
Contact Us | Privacy Statement


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Featured College
Accredited By: NCAHLC
Scholarships: Yes
The Commission of Higher Education at the New Hampshire Department of Education was established in 173 as the New Hampshire Postsecondary Education Commission. The Commission of Higher Education regulates for-profit, non-profit, independent, and public institutions within New Hampshire, and collects data to report on the progress of higher education in the state. They are also responsible for distributing grants like the College Access Challenge Grant, which aims to increase postsecondary education enrollment in New Hampshire. The College Access Challenge Grant supports the New Hampshire Higher Education Assistance Foundation's Center for College Planning, the New Hampshire College and University Council's Diversity Initiative, and the New Hampshire College and University Council's New Hampshire Scholars Initiative, as well as several other New Hampshire programs. New Hampshire institutions of higher education include Antioch University New England, Dartmouth College, Southern New Hampshire University, Keene State College, and the University of New Hampshire.
Dartmouth College
Dartmouth College was founded in 1769 in Hanover, N.H. The institution is a four-year, private, Ivy League college. U.S. News & World Report ranks Dartmouth College at No. 11 in National Universities in the 2012 edition of Best Colleges. The Dartmouth Institute for Health Policy & Clinical Practice offers online education courses for working health care professionals. The courses last six to eight weeks, and are designed and taught by instructors within the TDI's master's degree programs. The Dartmouth Institute also offers a Master of Health Care Delivery Science hybrid program that combines residential and online courses.
University of New Hampshire
The University of New Hampshire was founded in 1866 and operates locations in Durham, Concord, and Manchester, N.H. The four-year, public institution serves 15,128 students and has a student-to-faculty ratio of 18 to 1. The University of New Hampshire offers several undergraduate and graduate courses online in engineering and physical sciences, health and human services, liberal arts, life sciences and agriculture, applied science, and business and economics. The University of New Hampshire also offers audio and video material online for free to the public through iTunes U.
Southern New Hampshire University
Southern New Hampshire University was founded in 1932 as the New Hampshire School of Accounting and Secretarial Science. The university began offering online courses in 1995. U.S. News & World Report ranks Southern New Hampshire No. 110 in Regional Universities (North) in its 2012 edition of Best Colleges. Southern New Hampshire University offers online bachelor's and graduate degree programs in accounting, business administration, communication, computer information technology, creative writing, English language and literature, fashion merchandising, finance economics, game design and development, history, justice studies, and health care management. The school provides 24/7 technical support for Blackboard, hardware issues or any other online course-related issues, and the Shapiro Library for research and other academic resources.


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This property is managed by the Scottish Episcopal Church but is available to rent on an exclusive use basis. Sleeps up to 17 people.
Accommodation Provision
12 rooms.
Accessibility additional info
No wifi, television or mobile service available.
Explore Angus
Use the filters below to discover what there is to see and do, places to eat and where to stay in Angus.
By Locations:
By Accommodation:
By Where to Eat:
By Things to See & Do:
By Accessibility:


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2 Public health need and practice
2 Public health need and practice
Increasing physical activity has the potential to significantly improve both physical and mental wellbeing, reduce all-cause mortality and improve life expectancy. For example, increasing activity levels will help prevent and manage many conditions including coronary heart disease (CHD), cancer, diabetes, musculoskeletal disorders, obesity and stroke (Department of Health 2011). Physical activity can lower the risk of Alzheimer's disease (Scarmeas et al. 2009). It has also been shown to improve symptoms in those diagnosed with depression (Rimer et al. 2012). Physical activity also has a role in enhancing psychological wellbeing by improving mood, self-perception, self-esteem and reducing stress (Department of Health 2011).
The majority of adults and many children in England do not meet the Chief Medical Officer's (CMO) recommendations for physical activity. In 2008, based on self-reporting, 39% of men and 29% of women aged 16 and over met the CMO recommendations on minimum physical activity levels (The Health and Social Care Information Centre 2011)[3].
Physical activity levels vary according to income, gender, age, ethnicity, socioeconomic status and disability. People tend to be less physically active as they get older and levels of physical activity are generally lower among women than men. Physical activity levels are also lower among certain minority ethnic groups, among people from lower socioeconomic groups and among people with disabilities (Department of Health 2011).
Inactivity costs the NHS an estimated at £1.06 billion based on national cases of CHD, stroke, diabetes, colorectal cancer and breast cancer (all conditions that are potentially preventable or manageable through physical activity). This is a conservative estimate, given the exclusion of other health problems that physical activity can help manage and prevent. Examples include osteoporosis, falls and hypertension (Allender et al. 2007).
The total cost of inactivity further increases when considering the wider economic costs. These include sickness absence, estimated at £5.5 billion per year, and the premature death of productive people of working age from 'lifestyle-related' diseases, estimated at £1 billion per year (Ossa and Hutton 2002). In 2008, the Be active, be healthy plan (Department of Health 2009a) estimated that the average cost of physical inactivity for every primary care trust (PCT) in England was £5 million.
In response to NICE public health guidance 2 (2006), which endorsed brief interventions in primary care to increase physical activity, the DH developed and launched the 'Let's get moving' physical activity care pathway (DH 2009b). This care pathway endorses use of the general practitioner physical activity questionnaire (GPPAQ) to identify inactive patients in primary care. It also includes a brief intervention based on the principles of motivational interviewing to help all those classified as less than active to change their behaviour.
Two additions to the hypertension quality outcomes framework (QOF) indicator set (HYP004 and HYP005) relate to physical activity (NHS Employers 2013). Both include the use of GPPAQ and assessment of physical activity levels in relation to hypertension in a programme aimed at the prevention of CVD (see the NHS Employers website for further information).
[3] The recommended level of activity for adults at that time was 5 episodes of at least moderate-intensity activity on at least 5 days a week. In 2011, this was changed to being active daily and accumulating at least 150 minutes of moderate-intensity activity, or 75 minutes of vigorous activity, in bouts of 10 minutes or more over a week. Additional recommendations on strength and balance, and for older people and children, were also developed (Department of Health 2011).


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Warning: You're not viewing the latest Calico documentation.
Installing Calico on Kubernetes
We provide a number of manifests to get you up and running with Calico in just a few steps. Refer to the section that corresponds to your desired networking for instructions.
Should you wish to modify the manifests before applying them, refer to Customizing the manifests.
If you prefer not to use Kubernetes to start the Calico services, refer to the Integration guide.
Third-party solutions
Several third-party vendors also provide tools to install Kubernetes with Calico in a variety of environments.
|ACS Engine
|Deploys Kubernetes clusters on Azure with an option to enable Calico policy.
|Google Container Engine
|A managed Kubernetes environment by Google using Calico for network policy.
|Heptio AWS Quickstart
|Uses kubeadm and CloudFormation to build Kubernetes clusters on AWS using Calico for networking and network policy enforcement.
|IBM Cloud Kubernetes Service
|A managed Kubernetes environment by IBM using Calico for networking and network policy enforcement.
|A popular Kubernetes project for launching production-ready clusters on AWS, as well as other public and private cloud environments.
|Kubernetes kube-up
|Deploys Calico on GCE using the same underlying open-source infrastructure as Google's GKE platform.
|A Kubernetes project for deploying Kubernetes on GCE.
|Deploys a Kubernetes cluster with Calico to AWS in 3 steps using a web-based interface.
|Deploys free and minimal Kubernetes clusters with Terraform.


text: Vastavam web: Top producer Dil Raju is leaving no stone unturned for his next production Srinivasa Kalyanam which has been carrying decent expectations. Victory Venkatesh gave voice-over for Srinivasa Kalyanam starring Nithiin, Rashi Khanna. The film is said to be a marriage family entertainer and it will hit the big screens worldwide on August 9th. The film which is directed by Vegesna Satish and produced by Dil Raju. Micky J Meyer scoring music. Recently the film unit released the theatrical trailer and it gets a good response from the audience.


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Masters in Healthcare Degrees in the District of Columbia
The nation's capital, as it serves as a home or home-away-from-home for the country's leaders, must also have a strong healthcare industry to provide the country's top officials with top-notch healthcare. Healthcare is a booming industry in Washington, D.C., and according to the District of Columbia Department of Employment Services, education and health services are expected to see a 24.68% increase in jobs from 2010 to 2020. The healthcare career field that is expected to see the most growth in employment by 2020 is in home health care services, at 80.72%, followed by other health practitioners, at 54.72%, ambulatory health care services, at 48.39%, outpatient care centers, at 39.81%, and physicians' offices, at 32.63%. All of the listed healthcare career fields, such as dentistry, are expected to see a minimum of 16.45% growth, with the majority seeing growth above 25%.
Earning a master's in healthcare in D.C. can put someone in an ideal position to excel in one of many healthcare professions, such as nursing, health care administration, or public health. D.C.'s online master's degree programs in healthcare provide students with opportunities to pursue careers in healthcare management, making executive decisions at a hospital or clinic; clinical research, overseeing clinical studies to improve the quality of healthcare locally or nationwide; or nursing, offering specialized care to segments of the population including women and the elderly. Many healthcare careers pay well, according to the Bureau of Labor Statistics. The median pay for dentists in 2010 was $146,920; for occupational therapists was $72,320; and for nurses was $64,690. As with most fields, pay will vary based on one's level of education.
the District of Columbia Universities
George Washington University
Master of Science in Health Sciences in Clinical Management and Leadership
Master of Science in Health Sciences in Clinical Research Administration
Master of Science in Nursing in Clinical Research Administration
Master of Science in Health Sciences in Health Care Quality
Master of Science in Nursing in Health Care Quality
Master of Science in Health Sciences in Immunohematology
Washington, D.C., 20052
Georgetown University
Master of Science in Nursing in Adult Gerontology Clinical Nurse Clinical Specialist
Master of Science in Nursing in Family Nurse Practitioner
Master of Sciene in Nursing in Nurse Eductator
Master of Science in Nursing in Nurse Midwifery/Women's Health Nurse Practitioner
Washington, D.C., 20057


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When comparing Linksys WRT1900ACS vs AmpliFi HD, the Slant community recommends AmpliFi HD for most people. In the question"What are the best wireless routers?" AmpliFi HD is ranked 6th while Linksys WRT1900ACS is ranked 17th. The most important reason people chose AmpliFi HD is:
The Amplifi HD provides industry leading wireless connectivity coverage of up to 20,000 square feet. The included router and two extenders are best suited for large homes.
Ranked in these QuestionsQuestion Ranking
Pro Customization is possible using OpenWRT
This router has extensive customization options (enhanced QoS settings, WiFi optimization and traffic shaping, among other things). This is thanks to the use of OpenWRT, which is an open-source, Linux-based OS.
Pro Remote management via app
This router comes with a monitoring/management companion app for smartphones and tablets. This enables network managers to take actions remotely if needed, such as content blocking or device banning.
Pro Impressive hardware
This router had a 1.6 GHz dual-core CPU and it comes with 512MB of RAM. Its dual-band electronics make it capable of handling four independent lanes of data traffic.
Pro Great for office spaces
You can create a separate, password-protected WiFi network for up to 50 people and easily share the password. This means that you can have a more secure network at your office space. And if some of your guests are eating up all of your traffic, you can prioritize devices that need the most speed.
Pro Quick and easy setup
Once you have successfully connected your PC to the router, open any browser and go to 192.168.1.1. Everything else from there is self-explanatory.
Pro Excellent performance
This router's performance is very good: it has a peak performance of 1.9 Gbps on both bands (theoretical). It can move up to 600 Mbps in 2.4-GHz mode and up to 1,300 Mbps in 5-GHz mode. In real life testing at a close range the WRT1900ACS delivers a total throughput of 515 Mbps across its both bands.
Pro Excellent coverage
The Amplifi HD provides industry leading wireless connectivity coverage of up to 20,000 square feet. The included router and two extenders are best suited for large homes.
Pro Great throughput
The Amplifi HD averages around 705 Mbps of throughput at a close distance of 5 feet. At 140 feet, that throughput drops to 177.5 Mbps — more than enough to share a 100 Mbps broadband connection, which is the top speed that majority of computers, phones or tablets can handle.
Pro Better performance through walls than any other mesh network solution
AmpliFi HD uses 3x3 MIMO which allows it to perform better and more consistently in houses with lots of thick/plaster walls than any other mesh network solution.
Pro A snap to set up
To set up the router you just need to download the app and follow the step-by-step guide. The whole process takes a few minutes.
Pro Looks cool
The AmpliFi HD router has a unique design. It is a small white cube, with a round 1.6-inch touchscreen, that can show date, time or your upload and download speeds.
Pro App is intuitive to use
Pro Easy network management through a companion app
It has an intuitive companion app that enables instant setup, includes powerful reporting metrics, and provides easy guest access. If there's a network problem, you can resolve it via your app. There's also constant reporting on network security.
Pro A small or midsize home can be covered with just the router
AmpliFi router on its own has a range of 90 feet, which should be more than enough for a small or midsize home.
Con Lacks MU-MIMO for efficient network management
This can become an issue when you're streaming video or gaming online with multiple devices. With MU-MIMO the router would be able to stream multiple lanes of traffic simultaneously. Routers without MU-MIMO have to send data to each device in turn.
Con High price
While the router has blazingly fast download and upload speeds, at $229 it could be slightly pricey for average home networking customers.
Con Hefty design
This router's dimensions are 9.7 x 7.6 x 2.0 inches, which make it quite big when compared to competitors.
Con Mesh access points don't look as appealing as the router itself
The two mesh access points looks like antennas that you would put on the roof of your home. They are 9.6 inches tall and can take up much space on your outlets.
Con Mesh networks can be overkill in many instances
Mesh networks are a very good choice for bigger homes but they can be overkill in many instances. If you're living in an apartment or smaller home, the Amplifi HD system won't be the best solution.
Con Lacks ability to place device in DMZ
Users may need the ability to specify an IP that needs zero port restrictions and needs to be placed in the DMZ. This isn't an available option on the router; therefore, as a work around you must use port forwarding to open ports 1-65535 for a specific IP address. Hopefully this becomes an option in the future...
In situations where two people would try to start video streams at the same exact time on different devices, one of them would be prioritized over the other and it would have to wait until the first had buffered a few bits of data for itself. But usually, you won't notice a slowdown. This technology will be implemented with AmpliFi HD in the nearest future.


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Why Spend Money When You Can Buy Something for Free?
COLUMBIA - Imagine how much money you'd have right now if you could have a do-over on so many things you've bought or are paying for without thinking. We've got tips to some of the biggest offenders that you may be throwing your hard earned dollars at.
You've seen it, either in your own garage or someone else's. All of the cast offs that seemed like a great idea but just end up being sold for pennies on the dollar.
"Clothes I don't try on. I see it on the rack. And it looks nice. But i don't try it on and I don't take the tags off of it," said Shauna Marquardt, a smart shopper.
And there are lots of conveniences you don't need and are sinking money into every week or month, like ringtones and apps and games on your cell.
Sure 2 or 3 dollars a pop or 10 bucks a month doesn't seem like much for so much fun, but you can blow a lot of cash really quickly with this type of thinking. The solution, find them for free. Just search for free ones for your specific phone and service provider.
A good website I've found is Free Ringtones from Phonezoo.
If you still want a land-line phone, stop paying for the extras. Have you looked at your phone bill really closely. Do you really use call forwarding? And how often does call waiting make a big difference?
So if you mostly use your cell phone, pick up that land-line phone and call customer service. Cancel the bells and whistles and get the home service down to the bare minimum.
Next, reject paying for new computer software. You got a great deal on your new computer, so why go broke loading it up with software. Before you spend a dime, check out the "freeware" out there.
Freeware Home - Free Software Downloads is an index of site that lists more than 55 hundred programs that really are free. No asking for payment or donations and no time limit for games, graphics, fonts... Every type of desktop tool or gadget imaginable... Free.
Also, stop with the bottled water. Somehow the industry has convinced you to spend about 800 times more to buy water in a bottle than to just drink it from the tap. Bottled water goes for about 8 bucks a gallon...more than twice the cost of milk.
Meanwhile, a gallon of tap water costs you about a penny. If you don't like how it taste...install an inexpensive faucet filter or use a filter pitcher.
Then there's music downloads. Usually about a buck a song. There are plenty of ways to get free music downloads... Totally legal and easy to access.
Check out classical stuff at Classic Cat or Rhapsody. Country at Country Weekly Magazine under the "free music" downloads.
There's also free songs and special deals on Amazon. Click on "Digital Downloads" from the lefthand menu, then "MP3 Downloads." Then on the left under "Browse MP3s," there's a "Free Songs and Special Deals" option.
"If I'm still thinking about it a day or two later than maybe I'll go ahead and splurge," said Angela Belden, another smart shopper.
That's a great way to shop. A few other things you should also take a moment to double-think...extended warranties, gym contracts, rental car insurance, fast food runs and unlimited texting.


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ICT Regulation Toolkit / Documents
Download Now (100KB)
EU: Mutual Recognition Agreements
By EU. Published November 2006.
The ICT Regulation Toolkit is a joint production of infoDev and the International Telecommunications Union (ITU).
About this Toolkit | How to Use the Toolkit | Authors | Frequently Asked Questions | Contact | Terms of Use


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Day Camp
Specialty Camps
Voyager Camps
Academic Adventures Day Camp
Meet Our Team
Academic Adventures
English Immersion
Fay Academic Camp
Academic Adventures
Academic Adventures
Now's your chance to try something new! Join academically motivated and curious students
from around the country and the world for an enrichment experience that is more than just a camp.
FaySummer offers two two-week enrichment programs with courses in creative writing, humanities, science, math, and technology. Students enroll in two workshops that meet each weekday morning during the two-week session. These 60-80 minute courses are hands-on learning labs, where students are actively involved in fun projects that lead to a deeper understanding of the subject area and conjure excitement about new ideas. Students spend the other half of their day in electives of their choice: building a robot, swimming in our heated outdoor pools, challenging themselves on our ropes courses, creating a business, solving a crime...the choice is theirs and changes every day! Academic Adventures is an opportunity for adolescents to make lasting friendships, build independence, and participate in learning that is hands-on, meaningful—and fun.
Location & Facilities
Academic Adventures takes place on Fay School's 66-acre campus in Southborough, Massachusetts, 25 miles from Boston and 190 miles from New York City. Students have access to all of the school's state-of-the-art facilities, including two heated swimming pools, athletic fields, tennis courts, gyms, indoor rock climbing wall, outdoor adventure course, theater, visual arts center, and Innovation Lab. Transportation arrangements can be made for students to and from Fay School from Boston–Logan Airport and New York–JFK Aiport.
Who May Register?
Academic Adventures welcomes rising 6th grade through rising 9th grade students ages 10-14. Students must be prepared for a lively academic program filled with projects and discussions. Students in this program spend afternoons and evenings with students enrolled in FaySummer's English Immersion program, and our diverse multicultural community offers an exciting way for students to learn about new languages, cultures, and traditions.
If you are applying to Academic Adventures and you are not a native English speaker, you must submit a graded essay from your school as part of your application so that we can assess your level of English proficiency. Please email the camper's graded essay to email@example.com. Once the essay has been received, we will review the camper's application and notify you of our application decision within seven days.
Apply Now for Academic Adventures
Learn More
2 two-week sessions
Rising 6th through rising 9th graders
Ages 10-14
July 12 - July 24, 2020
July 26 - August 7, 2020
Here's a sample of the courses we've offered at Academic Adventures in previous years:
Robotics • CSI Forensic Science • Inventor Lab • Creative Writing • Nature Writing • News 2.0 • Young Entrepreneurs
"I loved my Academic Adventures classes and made a lot of new friends. I loved meeting kids from around the world, and I can't wait to see everyone next summer!" - Academic Adventures student
Want to learn more? Fill out the form below to receive information.
Day and Overnight Programs for ages 3-15
48 Main Street, Southborough, MA 01772 | 508.490.8371 |
Learn about Fay School


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Connecting Young Nebraskans (CYN) is a statewide network designed to connect, empower, and retain young Nebraskans. CYN strives to enhance opportunities for individuals to impact their communities through networking and learning experiences.
CYN engaged Maher & Maher to more effectively leverage and optimize its network by mapping the network to identify areas of strength, weakness, and opportunity.
The Maher & Maher approach to the CYN Network Mapping process included the following components:


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2011 Latium Valpolicella DOC
This wine has an intense ruby red colour and quite consistent. On the nose, it is quite intense and complex with a fine quality. We perceive the vinous nuances and the bouquet of red pulp of mature fruits. On the palate, there is the warm and soft sensations with some freshness. It is quite tannic but balanced and has a good structure - Latium Morini


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Villarmero, Bunts-Anderson win app contest
WASHINGTON, D.C.—Daniel Villarmero and Chenoa Bunts-Anderson of Marianas High School have been named the district-level winners of the 2017 Congressional App Challenge.
The Villarmero and Bunts-Anderson team bested 12 other submissions in the Northern Mariana's district-level competition, according to Delegate Gregorio Kilili C. Sablan.
"All of this year's entries to the app challenge were very creative and innovative—a great showing for the promise of STEM (science, technology, engineering, mathematics) education in the Northern Marianas," Sablan said. "Every one of the students who dreamed up a concept and programmed an app can be proud of their work."
Selection of the winning entry was made by judges Renee Bochman of the tech company LevelTrigger and Marc Boumedine of the University of the Virgin Islands.
Villarmero and Bunts-Anderson's app, called "The Student Companion," is Web-based and gives students a set of tools to help with their studies. Tools include a task manager with reminders, and a relaxation page that utilizes calming images and soothing music to help students rest during study breaks.
The two MHS seniors worked as a team on "The Student Companion," as did most of the 22 students who entered their work in the app challenge.
Villarmero and Bunts-Anderson will now receive national recognition and their app will be eligible for display in the U.S. Capitol.
Along with winners of the app challenge from across the country, the Marianas team will also be invited to attend the House of Code reception, scheduled for early spring next year in Washington, D.C., where they will be honored for their work.
Also receiving notable mentions: in second place, The Thought Bubble by Joanie Paraiso of Mount Carmel School, is an app that assists creative writers with writing tips and story ideas. In third place, Pocket Homework by Tawnie Manibusan and Cassidy Torres of Mount Carmel School, is an assignments tracking application specifically designed for student's smartphones.
This is the third year that Marianas students have accepted Sablani's invitation to take the Congressional App Challenge. The competition is open to all high school, middle school, and elementary students and is intended to encourage student creativity and participation in the STEM fields. Students may enter apps for a variety of platforms, such as Web browsers, smartphones, or desktop and laptop computers. (PR)


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19. Repurposing
A variety of things can be repurposed when cultivating a shaggy chic look. For example, check out the reclaimed window used as a wall feature here.
20. A Chest
A tried and true design trick for the shaggy chic living room is to use a chest as the coffee table.
21. Spark
Sometimes, a shaggy chic design can have a look that's too washed out. This can be corrected by incorporating splashes of bright color.
22. Window Frames
Accentuating your windows with antiqued wood pieces can be a great design move for the shabby chic living room.
23. Mixing It Up
You've seen a lot of great examples of the shabby chic living room. When it comes to designing one of your own, start by trying to mix and match different pieces you might already have!


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Bed and Breakfast La Ferme de Fontenelle (Amillis)
Located near Marne la Vallee, a short 60 minutes drive from the center of Paris, the owners of this Brie farm would be most pleased to welcome you to their guesthouse, bed and breakfast: whether for a night, a week-end or for a week long stay. Three newly renovated rooms, decorated with finesse and passion, are available with a private entrance and parking for your comfort and convenience. The Fontenelle farmhouse is located right in the middle of the Brie countryside near a quiet French country village where one can stay either for work or for rest and relaxation or to take advantage of all of the attractions in the village or near by: Disneyland,the medieval town of Provins, the chateau of Vaux-le-Vicomte and Fontainebleau, the city of Paris itself and the Champagne vineyards.
Accommodation prices
|Accommodation type
|price for two persons / day
|From 65 £ to 100 £
|price for two persons / week
|Additional bed
|17 £
Services on the site
- Host table / Restaurant
- Parking
- Garden
- Kitchenette or full equiped kitchen
- Fireplace
- Baby bed
- Billiard room
Language(s) spoken
english french
Additional Informations
- Closing period : None
- Owner's website
The latest reviews from travelers
1 Review
"Compte rendu de séjour"
Comme je l'ai déjà dit en signant le livre d'or, je ne peux que me féliciter d'avoir choisi ce gîte où tout fut parfait: accueil, hôtesse, chambre, petit déjeuner, propreté, situation. Je ne peux que recommander ce gîte qui possède trois belles chambres. Merci encore à nos hôtes.


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The IIA created Specialty Audit Centers —Environmental, Health & Safety Audit Center and Financial Services Audit Center — to provide premium resources focused on issues that matter most to you and your stakeholders.
In addition to the benefits of your IIA membership, Center members gain access to a vast network of tailored thought leadership, exclusive networking events, customized learning, and relevant resources you can't find anywhere else. All Center solutions are specifically developed and aggregated to address members' unique needs.
Add the Financial Services Audit Center and learn more here.
Add the Environmental, Health & Safety Audit Center and learn more here.
Gain access to cutting-edge industry information and resources by enrolling today. When you enroll, you will receive the benefits of both The IIA and the Financial Services Audit Center. Join The IIA.
Disclaimer: The $50 dollar add-on is only available to current members of The IIA.


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Beautiful 3BR/3BA Beach Cottage in the popular tennis and beach community of Hidden Dunes. This is a private gated Community with 24/7 Security. Just a few steps away from the pool, this secluded beach getaway is perfect for a 2nd home or a rental property. Private Beach Access and a first class tennis facility are just steps away. Artwork in unit does not convey with purchase.
Electric Available, Public Sewer Available, Public Water Available, TV Cable Available
DISCLAIMER: Information Deemed Reliable but not guaranteed. The information being provided is for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.
All listings are provided courtesy of the Emerald Coast Association of Realtors, Copyright2020, All rights reserved.
Listing information last updated on April 1st, 2020 at 3:16pm CDT.


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Defence Secretary plans intervention to protect Armed Forces personnel from SNP tax rises
Britain's Defence Secretary is planning an unprecedented intervention to prevent Armed Forces personnel in Scotland being "punished" by SNP tax rises.
Gavin Williamson wants to counter the decision by the Scottish Government to create new income tax bands and increased tax levels that will leave those serving in the military north of the border worse off than their counterparts in the rest of the UK.
He said around 8,000 men and women in the services were due to be hit by the "unfair" tax rises.
Mr Williamson added: "The SNP's tax hike unfairly hits 70 per cent of our brave and loyal service personnel based in Scotland, leaving thousands of them out of pocket. This is wrong.
"I am working to ensure that those who are affected do not feel they are being punished by serving in Scotland. We are urgently reviewing how we can counter this unjustified raid on the pay packets of our Armed Forces."
The review may lead to an annual compensation payment or a monthly increase in wages and could be introduced in the near future, with the tax changes taking effect from next month.
The Scottish Parliament last month ratified the SNP administration's plans, which will mean those earning over £26,000 paying more tax than those south of the border.
The new five-band system creates a 19p "starter" rate for lower earners and a 21p "intermediate" rate for earnings of more than £24,000. The higher and additional rates will also be increased to 41p and 46p respectively.
In the Armed Forces, the tax hikes will mean a staff sergeant paying an extra £117 a year in Scotland. An army major would pay £660 more while a lieutenant colonel would pay £863 extra, and a full colonel £1,013.
The tax row comes at a time when Scotland's role in the defence of the UK is set to increase.
Around,400 submariners will move to HM Naval Base Clyde by 2020, to create the new single home of the entire UK Submarine Service. Army numbers are also due to rise with the return of troops from Germany.
An additional 400 personnel will also move to RAF Lossiemouth as it adds a fourth Typhoon squadron and prepares to receive the entire UK fleet of nine submarine hunter Poseidon P-8 Maritime Patrol Aircraft from the early 2020s.
David Mundell, the Scottish Secretary, said servicemen and women made a huge contribution to the communities and the economy of Scotland.
He added: "The Scottish Government's decision to make Scotland the most highly taxed part of the UK means they would be penalised for being stationed here. It's absolutely right we take steps to address that."
Kirstene Hair, the Conservative MP for Angus, who wrote to Mr Williamson last month about the tax rises, said the UK Government was "having to clear up the SNP's mess".
"This hike on taxation is unwanted and unnecessary," she said. "It's clear the SNP has no respect for military staff, and no respect for people who work hard to do their best for their family."


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For anyone who thinks we have a scarcity of money in the school district let me make this clear right now. Indian River County is a community of abundance. The property taxes and impact fees collected are more than sufficient to meet our local needs, if we use them judiciously. We have a spending problem.
Bureaucrats have endless wants and it comes down to the elected representatives to make certain that those wants and needs are in alignment with the mission. Every year their budget requests grow. This coming budget year 2014-15 they are requesting (and it seems the board will not ask them to sharpen their pencils, so they will get it) their largest budget since 2007. They preside over a 122 million dollar budget that will grow by almost $5 million this year. Almost all of that growth comes from OUR property taxes. Now, they will try to tell you about a "budget shortfall" of several million dollars because their wants exceed the budget with which they are already working. But we have to ask ourselves one simple question:
"How will this expenditure provide a world-class education for our children and prepare the next generation of Americans?"
A health clinic for employees when there are so many quality options in the Private sector? Nope, that's a waste of our money. How many teachers and special needs assistants could we secure with that same $156,000? $25,000 of that was spent to remodel a nearby portable "just in case" they need the overflow. We beat up the teachers on their contract so that we can remodel things "just in case". With those same funds we could have hired three teachers and two part-time aids! Or, we could have created a classroom materials fund so teachers don't have to use their own money to buy materials so they can inventively teach our children. I'm still waiting to meet the parent or taxpayer who would rather duplicate or compete with the excellent private sector options for medical services by essentially FIRING TEACHERS AND SPECIAL EDUCATION ASSISTANTS. Our kids deserve better.
We have to embrace smarter spending.
Vote for Shawn R. Frost, MBA on August 26th to ensure that we start spending in a way that most benefits our kids.


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- Intro
- Disclaimer
- Manuals and service information
- Exterior
- Design and internal design
- Control application features
- Cryocooler first test
- Conclusion
I've used liquid nitrogen for years to cool high-power computer CPUs and GPUs in pursue of higher frequencies and performance. What started as hobby once, is now part of my daily job, and cooling semiconductor devices down to -196 °C is not unusual for me anymore. This also reflected in design and CAD design support Kingpincooling.com for various copper heat evaporator blocks. These niche products provide entry point for anyone who'd like to try cryogenic cooling for PC. In computer industry overclocking with liquid nitrogen cooling have purely sport entertainment purpose. It is also indicator of what future processors and graphic cards may achieve, if not thermal or power constrains. However actual useful and practical applications of such low-temperature cooling concepts also well exist in the electronics industry.
Image 1: Extreme cryocooled rig with four GeForce GTX 580 and EVGA SR-2 dual-socket CPU board
These practical applications of electronics cooled down to liquid-nitrogen temperatures are often related to specialized analog sensors, scientific research, high-temperature superconductor device use, ultra-low noise RF filters and amplifiers, chemical materials research and metallurgy. Traditional low-temperature superconductors include infamous primary voltage standards, like Josephson Junction Array and SQUID require even colder temperatures, with help of liquid helium or complex multi-stage cryosystems. Quantum devices are also operate at temperatures very close to absolute zero on Kelvin scale.
However using liquid cryogenic coolant for continuous operation is not convenient, it require large vacuum-insulated Dewar tanks, transportation and storage difficulties, and so on. If heat load of device that need to be cooled is small, there is an alternative solution to all this messy business, which is use closed-cycle cryocooling engine. Compressors with helium gas as a working body are often used to cool small DUT devices down to 77 K or even colder temperatures.
We got our hands on such cryocooled semiconductor system, in shape of the old cellular base station RF filter, Model 850SLB6F1R SuperLink Rx. These devices made by Semiconductor Technologies, designed to improve RF receive path quality of the cellular base station. Superconducting low-noise filter or amplifier circuitry working in 840 MHz B-Band frequency range chilled to temperatures below -190 °C during continuous operation 24/7. It is essentially a highly selective and sensitive low-noise RF filter used to clean the receive path of wireless base stations.
Handling cryogenic liquids and cryogenic coolers can be dangerous and require personal protection equipment. LN2 is very cold substance, -196 °C (-320 °F) and can cause severe frostbite. Nitrogen's critical point is -126.2 K, as result it cannot stay liquid at ambient temperature at any pressure. If sealed in the container, this will cause explosion. LN2 also have gas to liquid ratio 700 to 1, so it can displace all oxygen in the closed room and cause suffocation without warning. Never use LN2 in a small poorly ventilated room. Treat liquid nitrogen and any cooled object with respect.
Redistribution and use of this article, any parts of it or any images or files referenced in it, in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
- Redistributions of article must retain the above copyright notice, this list of conditions, link to this page (https://xdevs.com/article/sti/) and the following disclaimer.
- Redistributions of files in binary form must reproduce the above copyright notice, this list of conditions, link to this page (https://xdevs.com/article/sti/), and the following disclaimer in the documentation and/or other materials provided with the distribution, for example Readme file.
All information posted here is hosted just for education purposes and provided AS IS. In no event shall the author, xDevs.com site, or any other 3rd party, including Superconductor Technologies be liable for any special, direct, indirect, or consequential damages or any damages whatsoever resulting from loss of use, data or profits, whether in an action of contract, negligence or other tortuous action, arising out of or in connection with the use or performance of information published here.
If you willing to contribute or add your experience regarding instrument repairs or provide extra information, you can do so following these simple instructions
Manuals and service information
SuperFilter Operation and Installation Manual, SN00673 and up, September 21, 2000
SuperLink Rx 1900 Operation and Installation manual
SuperLink Rx Operation and Installation Manual, March 5, 2004
SuperFilter Operation and Installation Manual
Patent, Stirling Cycle Cryocooler with Optimized Cold End Design
Patent, Electromechanical transducer particularly suitable for linear alternator.
Patent, Fluid bearing with compliant linkage for centering reciprocating bodies.
Patent, Cryocooler housing assembly apparatus and method.
Patent, Cryocooler with moving piston and moving cylinder.
Patent, Tower mountable cryocooler and HTSC filter system.
Patent, Cryocooler motor with split return iron.
Patent, Metalorganic Deposition Method for forming epitaxial Thallium-based CuO superconducting films.
Patent, Controlled thallium oxide evaporation for thallium superconductor films and reactor design.
Patent, Epitaxial Thallium HTS films formed via a nucleation layer
Patent, High temperature superconductor lumped elements and circuit.
Patent, Temperature controlling cryogenic package system
Patent, HTS Lumped Element Band-Reject filters.
Image 2: STI SuperLink RX in it's beaten exterior shape
Label is quite interesting too, Dangerous goods from Great Saline! It's not a surprise, because superconducting material in the RF section contains Thallium metal, which is toxic. It was used as strong rats poison in the past.
Thallium and its compounds are highly toxic. Contact with skin is dangerous. Thallium and Thallium salts are colorless, odorless and tasteless. Thallium poisoning with slow-acting, painful and wide-ranging symptoms are often suggestive of a host of other illnesses and condition. Never disassemble, grind, lap, fire or chemically clean LNA assembly package to avoid health hazard risks.
Image 3-4: Front face and warning labels on top cover.
Image 5-6: Rear connections and front side fan filter, status LEDs.
Unit is quite heavy, so be sure to prepare enough space on the table when working with the device.
Image 7: STI SuperLink RX functional block diagram.
Since this unit is designed for telecom environment, it's input power is DC +27 VDC. Internal power regulator generate all voltages for digital and analog control circuitry. Cryogenic cooler motor is driven by AC signal, synthesized on control PCBA as well. All key input and output parameters, such as voltages, RMS and real currents and duty cycle are monitored and logged by digital microcontroller. Multiple temperature sensors provide feedback about ambient, rejection and cold end temperatures for realtime PID-control.
Superconducting RF front-end is implemented in thermally and electrically isolated chamber, called Cryogenic RF Enclosure (CoRE). Bypass RF relays are mounted on chassis frame outside of cooled compartment to allow for RF path bypass (e.g. when system is cooling down or failed to operate properly).
Let's crack the hood of the actual device open, and see what we dealing with.
Image 8-9: Cryocooler assembly and RF cryocooled isolated chamber (left to right).
Image 10-11: Overview on labels and external RF switching and N-type connectors.
Image 12-13: Side view on both metal assemblies.
Stirling engine cryocooler
In 1816 Dr. Robert Stirling patented power engine which worked on process that became known as the Stirling Engine Cycle. The external engine was characterized by a power piston, a displacer to move the enclosed working gas body between the hot and cold ends and a regenerator, placed between the hot and cold ends of the displacer cylinder. The end result was enhanced operational efficiency of the engine, leading to a reduction in the amount of energy needed to heat up the working gas.
The Stirling refrigerator's most basic schematics consist of the piston and displacer. According to the ideal gas law, during the repeated gas expansions the heat is repeatedly absorbed by the expanded gas from its surroundings, making it colder. Analogously, during the repeated gas compressions the heat is repeatedly ejected from the compressed gas into the atmosphere. Proper timing of the compression and expansion phases allows for lifting the heat at the cold side, transporting it through the regenerator to the hot side and ejecting it into the atmosphere. For over two centuries this basic concept of the Stirling engine has remained unchanged, while advances in regenerator materials, seal technology and flexure bearing designs have made the Stirling engines highly efficient, reliable and robust machines.
Stirling-process Cryocoolers can come in various sizes and cooling power capacity ratings, from small 2-5W units to multiple kW beasts, with operating temperature ranges of 10 – 40 K (dual-stage designs) to 40 – 150 K for single-stage designs.
Superconductor Technologies Sapphire cryocooler is using single-stage design to provide heat lift from vacuum-insulated chamber with RF components into ambient atmosphere, cooling down cold finger to extreme temperatures. The Sapphire Cooler use compressed helium gas to maintain the insulated RF assembly chamber at an operating temperature of about 78 K (Kelvin, or -195 °C). The compressor and cold finger are fully integrated into a single self-contained hermetic unit. The cooling motor driver controller provides drive and maintains a constant temperature. Temperature sensors in both the chamber and the cooler provide for constant temperature monitoring of the system by the software.
Image 14: Is that "Medium leak before" hand written label?
That label bit alarming. Let's hope that it does not mean that cryocooler had all helium leaked. Such thing would turn this device into useless piece of metalwork.
Cryocooler construction and concept of operation covered by patent US6327862 in great detail. This design provides about 5.7 watts of heat lift with 77K (-196 °C) cold finger temperature at 100 W of input electrical power.
Image 15: Construction drawing of the cryocooler from patent US6327862.
This cooler electrical compressor operates at 66 VAC, 60 Hz, which is generated by power convertor on controller board. Overall unit is powered by +27 VDC, which is received at the external POWER terminal block connections, located on the rear panel of the STI SuperFilter. DC power is routed through a 12 A fuse (or 10 A on some SuperFilter models) to the fan and the power supply module.
%(imgref)Image 16: Stirling cycle phases. Courtesy of Stirling Cryogenics
Dewar assembly with superconducting LNA
RF filter in this unit is based on TBCCO-2223 superconductor (Thallium barium calcium copper oxide) is a family of high-temperature superconductors having the generalized chemical formula TlmBa2Can−1CunO2n+m+2. This superconductor material has critical temperature (Tc) of 127 K.
Image 17: Thermal sensor at the reject side of the cooler and view on hot side heatsink.
Few other cuprates are also widely used in high-temperature superconductor applications, such as YBCO and BSCCO. BSCCO superconductors already have large-scale application, for example, tens of kilometers of BSCCO-2223 electrical cables are being used in the CERN's LHC particle accelerator.
Small YBCO superconductor blocks cooled by liquid nitrogen are also well known in popular videos and experiments using magnets, to demonstrate magnetic levitation.
Control and power board
Image 18: Control and monitoring electronics.
Mainboard with control and power convertor circuitry is located on the side of chassis. Controller in TQFP package have label 944-0005-6 V5.2.3 which likely means firmware version.
There are bunch of logic chips nearby, such as U13 16-Kbit SPI EEPROM 25C160, few U12,U17 Texas Instruments LMC6482 R2R ultra-low input current (<20 fA!) operational amplifiers, U22 LTC1262IS8 30mA 12V DC-DC regulator, U19 AD8552 which is zero-drift RRIO dual opamp.
Output power stage that drives cryocooler compressor motor is controlled by Linear LT1171 that have wide input voltage range from 3V to 60V and capable to provide 2.5 A of switching current and can be externally synchronized to desired operating frequency. Pair of 4700 µF × 63 V capacitors from Cornell Dubilier provide output signal filtering.
Image 19: Close view on electronics PCBA.
There are even six Vishay Precision Group metal foil S102-series resistors in rectangular black epoxy packages, standing next to DAC. Good old MAX3232 also here, to provide level conversion TTL-CMOS for RS232 port.
Control application features
STI have Java-based application for these SuperLink units that allow monitoring and controlling all key parameters of the cryostage. It was available for download from STI some time ago, but since company was made aware of non-designed use of these cryocoolers by DIY makers (mostly to make homemade setups to condense air/nitrogen), they removed application from site. We got a copy for use before that happened, so here it is.
Image 20: STI System Status Portal main menu when everything running.
Cryocooler first test
First thing to do, is to verify that cryocooling assembly is still functional and have no problems reaching operation temperature points.
STEP 1 – Connect interface cable to WinPC.
Connect Windows-based PC terminal RS232 cable to SuperLink RX. To communicate with the controller board, STI provides two programs you need to install on your PC: Java Runtime Environment and the System Status Portal control software. The Java Runtime Environment is required for the System Status Portal to operate properly. If you already have the Java Runtime Environment on your PC, you do not need to install this program. This Application will allow to control and monitor all essential Cryocooler's operation data using just single serial Interface to Terminal application on PC.
Image 21: Connection between RS232 port on PC and SuperLink RX unit.
STEP 2 – Find suitable power supply and connect it to SuperLink RX.
Run the power wire from DC power source output to the terminal block on the rear panel of the SL Rx. If DC PSU have sense lines, connect them only at the SuperLink RX terminal block, following the polarity (Sense+ connect to Force+, and Sense- connect to Force-). The terminal block connections are labeled 27 VDC IN + and -.
Image 22: Connection between HP E6653A DC PSU and SuperLink RX.
In our test run 500W HP/Agilent/Keysight 6653A system DC Power supply will be used to perform performance testing and functionality checks. This model is capable to deliver 35 VDC with loading current up to 15 A, which is well in margins of what required by SuperLink RX.
Set voltage sense to remote operation, if all four wires are connected correctly.
STEP 3 – Set the DC source to correct voltage and current limits for first test run.
Program HP 6653A to output +27.00 VDC and 10.00 A current limit. This is well in range of what SuperLink RX designed to take.
Check all the connections again, and if everything looks good, turn the DC Power supply output ON.
Image 23: Connection between HP E6653A DC PSU and SuperLink RX.
SuperLink RX controller board will gracefully start the cryocooler and front panel STATUS and BYPASS LED should be lit. When the cryogenic chamber has reached operating temperature at 78 K, the STATUS LED will be steady GREEN and the BYPASS LED will be off. Cooling down procedure should take less than 30 minutes, and no abnormal noises should be heard from the unit.
STEP 4 – Control software interface check and monitoring live unit telemetry.
We can attempt to read telemetry of the unit, while it's running, by using System Status Portal control software. Click Communicate with Unit to establish communication with the SL Rx. Select the correct Serial Port to which unit is connected to establish communication, and then click OK.
Image 24: Serial port configuration menu.
If there is communication error, check that all connections are correct.
Image 25: Communication error if incorrect connections are made.
Sometimes with installation of new hardware/software system reboot is required, if there is connection issue.
STEP 5 – Check telemetry data once connection is established.
We had no problems to interface the cooler, using Windows 7 laptop and standard USB-Serial dongle cable.
Image 26: Unit fault log and version information
No faults are reported, and firmware/EEPROM versions are matching the actual unit labels. Interesting to note build date, which is May 19, 2003.
Image 27: Serial numbers for each key assembly in the SuperLink RX
Serial numbers are also matching up well, giving good confidence that control board and all components were not replaced and all calibration data is still intact.
Image 28: Unit fault log and version information
History and current status are all reported as well. 57055 hours of running time translate into about 6.5 years of operation. Counting from the 2003, that would mean decommission of this specific SuperLink RX in 2009, 9 years ago.
STEP 6 – Cooling system telemetry verification
Image 29: Unit fault log and version information
After running everything about 1.5 hours temperature slowly creeped down to 83 K (-190 °C), which is close to the set point. Peak power was around 105-110 W, with cooler current near 8 A.
Image 30: Unit fault log and version information
Half hour more, and we reached the temperature regulation setpoint at 78.8 K (-194 °C), and power consumption dropped to about 33 W, while cooler current (RMS) dropped to 5.2 A.
So now I can happily confirm that cooling system and everything related to it works just fine. I'm not interested much in RF section, so that will be all removed and replaced with own assembly once the time comes. Back to the drawing board now!
We will be using this cooler to experiment with various semiconductor sensors and devices , such as precision DC references, operational amplifiers, ADC and DACs. Parameters and performance of commercial devices is almost never specified at such low temperatures, so we might discover some interesting effects, not well known to engineers outside of aerospace/physics science labs. One particular interest for me – voltage and current noise performance of high resolution ΔΣ ADC and buried zener references, such as Linear LTZ1000A or LM399.
Discussion about this article and related stuff is welcome in comment section or at our own IRC chat server: irc.xdevs.com (standard port 6667, channel: #xDevs.com). Web-interface for access mirrored on this page.
Modified: May 9, 2019, 1:11 a.m.


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AALA members are invited to attend the 2018 CIArb Australia Business Lunch featuring Guest Speaker, Alan Oxley. To be held at the RACV Club, Melbourne, the lunch will be attended by distinguished guests including The Hon Martin Pakula, Attorney General of Victoria, members of the judiciary, institutes and commercial enterprises. As seats are strictly limited, be sure to register on time.
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Minimalist Utah Art Print
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Johnson O'Malley
The Cheyenne and Arapaho Johnson O'Malley Program is a federally funded program that provides supplemental assistance for the unique educational needs of individual students. Funding for the program is provided annually for all eligible Native American students who live within the nine-county service area and attend a public school or one of the Tribes' Head Start Programs.
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Download Vuze 1.8.1 for Android
In Video Players by Developer Azureus Software, Inc.
Last Updated: June 11, 2015
Vuze file details:
|App Developer
|Azureus Software, Inc.
|App Updated
|June 11, 2015
|APK Version
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Download Vuze Latest Version 1.8.1 for Android, click the direct download link below to download APK file with maximum download speed.
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Posts tagged 'Colocation'
Create Facebook App Page With Free Google Sites
Create Facebook App Page With Free Google Sites with just few clicks without knowing a single bit of coding things. We are giving warranty, it will look great. Previously we described various ways to Create Facebook App Page or real App, it will be almost like a mini sitemap here, still we are giving you options to Create Facebook App Page in various ways :
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How to have a totally noiseless PC
The reasons for having a quiet computer is obvious, but you must understand that a silent PC performance inevitably will be diminished. Indeed, a powerful component heats up early and therefore need a more consistent cooling.
We can therefore say that more a PC is more powerful, more noisy it will be. The main cause is noise generated by the cooling fans.
It is not always true. There is liquid cooling systems which are silent and allow to cool its components optimally. The disadvantage is that this type of installation is very expensive. We have written about overheating and its control before, you be interested to read it as well.
How to cool computer noiseless
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Trisha said…
That was awesome Deb! Looks like you guys had a good time from this video and the pictures.
Andy said…
I don't get it....did you or your class write the script for video segment??
Deborah said…
No, Andy, we just introduced the News@Noon while on a field trip to the newspaper.
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