I'm having trouble opening Minecraft.jar because there is no java runtime in open with listed. Even though I have installed it. This seems to be the solution  But I don't understand how I'm supposed to make the file hes talking about. I right clicked in  /usr/share/applications/ but it didn't give me an option to make a file.   Thanks for any help.
I'm wondering something. Whenever i right click on minecraft and click open with another application, i try to find Java JDK. I have installed it for minecraft itself, but i just cant find where java is on the list of other applications. Any help?
Hahn-Banach Theorem for separable spaces without Zorn's Lemma Today, comparing processors is obviously not just looking at the frequency and the number of cores.  When choosing a new PC, how do you compare processors? Is there some resource, like a site or something that does (not necessarily super-precise) processor comparisons?  Thanks. How to install TP-LINK T2UH Wireless adapter Driver (Ralink mt7610u) Positioning relative to page in TikZ Export each image from a collection in Google Earth Engine How can I make NON-fluffy pancakes? Every recipe I can find is for "fluffy" pancakes.  I prefer thinner, slightly crispy, (very) slightly chewy, non-fluffy pancakes.  Basically, the less "cake-like" the better.  Apparently I'm the only one, and these are all non-desirable qualities in a pancake, so it is hard to find recipes.  How can I make non-fluffy pancakes?  I will be using a cast-iron pan. Why does std::getline() skip input after a formatted extraction? Design Review: 3.3V Logic to 12V Logic (Uni-directional and Bi-directional) I'm looking for feedback and improvements on my design below. Specific questions are at the end. I created this as an attempt to answer my own, . From my feedback there, it seems like I needed to be more clear in my requirements. These are screenshots from Eagle. If there's a better way to share, please let me know so I can correct it. Entire board  The overall purpose of this board is to translate between 12V logic, and 3.3V logic. The top portion of the board represents the 12V side. The LEDs are placeholders to indicate whether the 12V signal is HIGH or LOW. In practice, these would be replaced with more , requiring up to 3A. The switches are also placeholders, allowing one to manually turn the 12V signal on and off. They are only for test purposes, the &quot;real&quot; 12V signal would be coming as the output from other relays. The bottom half is the 3.3V side. This will be connected to a  (BBB). The board will connect to 2 output GPIO pins and 2 input GPIO pins of the BBB. Overall, I want to translate the 3.3V I/O from the BBB to the 12V signals on the other side (to control more relays and read their signals). I have designed 3 modules to control both directions individually, and together. 3V3_TO_12V Module  This module converts the 3.3V GPIO output from the BBB to a 12V signal on the other side. When the 3.3V signal is low, the 12V signal is low. When the 3.3V signal is high, the 12V signal is high. To do this, the 3.3V GPIO output is connect to a , which turns a  relay on and off. This switches the 12V power as output of the module to be used elsewhere. 12V_TO_3V3 Module  This module converts a 12V signal to 3.3V signal, to be read by a GPIO input from the BBB on the other side. When the 12V signal is low, the 3.3V signal is low. When the 12V signal is high, the 3.3V signal is high. To do this, the 12V signal simply turns a  relay on and off. This switches the 3.3V power to be read as input by the BBB. DUAL_12V↔3V3 Module  This module combines the previous two modules to create a bidirectional translation. If the 12V side is high, the 3.3V input to the BBB GPIO should be high. If the 3.3V output from the BBB GPIO is high, then the 12V side should be high too. It's similar to a logical OR, if either side is high, the corresponding signal on the other side should be high too. A single 12V signal has to be split into individual input and output signals on the 3.3V side for the BBB. Questions  Is the  and  relay combination overkill for having the BBB GPIO output control the 12V power line? I like the isolation and safety it provides, but it seems too much (in terms of cost and board space) Is there a better solution for the 12V to 3.3V conversion. I like the simplicity of the  relay switching a 3.3V signal, but it takes up lots of room. Does the DUAL_12V↔3V3 Module (which combines each translation direction) even make sense? This seems wasteful to use 2 relays and a high side driver, but I haven't found simpler solution that achieves the same result. Should I add pulldown resistors for the BBB GPIO inputs, or are the internal pulldown resistors good enough?  Any other feedback is welcome. I'm new to electronic design. Partial Sums of Geometric Series I'm code reviewing a change one of my co-workers just did, and he added a bunch of calls to Date.toMonth(), Date.toYear() and other deprecated Date methods.  All these methods were deprecated in JDK 1.1, but he insists that it's ok to use them because they haven't gone away yet (we're using JDK 1.5) and I'm saying they might go away any day now and he should use Calendar methods.  Has Sun/Oracle actually said when these things are going away, or does @deprecated just mean you lose style points? With the confirmation that elements 113, 115, 117, and 118 are indeed fundamental elements that are now to be named on the periodic table, the next question is: what is the highest atomic number possible for an element? Feynman had a go at this years ago, and he derived (according to my limited understanding) that above element-137 (informally denoted 'Feynmanium') the electrons in the nearest orbit about the nucleus would be traveling at a velocity greater than the speed of light. (Note I am considering the Bohr model of the atom in this question.) I wished to demonstrate to my friends why this is and I came up with the following explanation.  According to Bohr's quantum condition, the angular momentum of an electron about the nucleus is given by $$ L=m_evr_n=n\hslash \implies r_n=\frac{n\hslash}{m_ev},$$ where $m_e$ is the mass of the electron, $v$ its velocity, $n$ an integer, and $r_n$ the radius of the $n$th possible orbit. Because we are concerned with the nearest orbit to the nucleus, $n=1$; and thus $$r=\frac{\hslash}{m_ev}.$$   Now, according to Coulomb's law, if the electron orbits about the nucleus the centripetal motion can be described by $$\frac{Ze^2}{4\pi\epsilon_or}=m_ev^2, $$ where $Z$ denotes the number of protons in the nucleus (the atomic number), and $e$ the elementary charge. Solving for $Z$ and substituting in $r$ from above yields $$Z=\frac{4\pi\epsilon_o \hslash v}{e^2}. $$ But what is $v$? Well, the maximum velocity an electron could ever have is the speed of light, and we wish to find the atomic number associated with an orbiting electron traveling at this speed, so we set $v=c$ and obtain our final result of $$Z=\frac{4\pi\epsilon_o\hslash c}{e^2}\approx 137.521,$$ which implies that for $Z&gt;137$, the electrons at a position of $n=1$ in the Bohr model would have a velocity $&gt;c$; and thus the highest atomic number achievable on the periodic table is 137.  Again, I just want to make sure this is a correct method for deriving element-137 before presenting. Perhaps one could explain how relativity plays a role here. I know Feynman used the Dirac equation to get this result...so could anyone (subsequently of course) expatiate on this in a simplistic manner? Thanks! Proof of "Dual normed vector space is complete" Removing the TK icon on a Tkinter window How to remove tkinter icon from title bar in it's window How can I stop the symbolic x coords to be plotted twice? I have created a bar diagram similar to:   But at a certain width the symbolic x coords are plotted twice. How can I manage the x axis correctly?  Here is my mini example:  \documentclass[12pt,a4paper,]{scrartcl} \usepackage{a4wide} \usepackage[utf8]{inputenc} \usepackage[T1]{fontenc} \usepackage[ngerman]{babel} \usepackage{graphicx} \usepackage{tikz} \usepackage[miktex]{gnuplottex}  \usepackage{pgfplots}    \begin{document}     \begin{figure}         \begin{tikzpicture}         \begin{axis}[%         width=1\linewidth,         height=0.5\linewidth,         axis x line=center,         axis y line=left,         symbolic x coords={CP-Schelle,Mistel-Schelle V2,Mistel-Schelle V4,Mistel-Schelle V4.2D,Gewickelt nach Inspire},         enlargelimits=true,         ymin=0,         nodes near coords,         x tick label style={         font=\small,         text width=1cm,         align=center         },         ybar]         \addplot[color=gray, fill] coordinates {(CP-Schelle,1.000)};         \addplot[color=blue, fill] coordinates {(Mistel-Schelle V2,2.459)(Mistel-Schelle V4,3.318)(Mistel-Schelle V4.2D,2.243)(Gewickelt nach Inspire,1.782)};         \end{axis}         \end{tikzpicture}     \end{figure}      \begin{figure}         \begin{tikzpicture}         \begin{axis}[%         width=0.6\linewidth,         height=0.5\linewidth,         axis x line=center,         axis y line=left,         symbolic x coords={CP-Schelle,Mistel-Schelle V2,Mistel-Schelle V4,Mistel-Schelle V4.2D,Gewickelt nach Inspire},         enlargelimits=true,         ymin=0,         nodes near coords,         x tick label style={             font=\small,             text width=1cm,             align=center         },         ybar]         \addplot[color=gray, fill] coordinates {(CP-Schelle,1.000)};         \addplot[color=blue, fill] coordinates {(Mistel-Schelle V2,2.459)(Mistel-Schelle V4,3.318)(Mistel-Schelle V4.2D,2.243)(Gewickelt nach Inspire,1.782)};         \end{axis}         \end{tikzpicture}     \end{figure}  \end{document} I'm absolutely new to Linux. I would like to know how to install Ubuntu alongside the pre-installed Windows 8+ OS.  Should I do it with Wubi, or through the Live USB/DVD?  What steps do I need to take to correctly install Ubuntu? Is there a feasible way to take a one year break from a IT job and work as a crew member on a big ship? How can one go about this? I am a recreational sailor and know intermediate sailing, coastal navigation, radio handling and all that stuff. I think this could be the experience of a life time. Where should  I look? I imagine getting it would be hard since obviously this is a lucrative job. I was wondering if there was any was I could right click inside any instance of a "Finder" window such that I have an option that says "Open Terminal Here". It would be really helpful. $\mathbb{R}$ \ $\mathbb{Q}$ and $\mathbb{R}^2\setminus\mathbb{Q}^2$ disconnected? If I want to prove that $\mathbb{R} \setminus \mathbb{Q}$ is disconnected, does it suffice to say that there are two open disjoint sets that cover $\mathbb{R}\setminus\mathbb{Q}$, namely:  $$(- \infty, 0), (0, \infty)\text{ ?}$$  Along the same lines, I want to prove or disprove that $S = \mathbb{R}^2 \setminus \mathbb{Q}^2$ (points $(x, y) \in S$ that have at least one irrationais connected. I feel that it is also disconnected; does it suffice to say that there are two open disjoint sets that cover $S = \mathbb{R}^2 \setminus \mathbb{Q}^2$, namely $((- \infty, - \infty), (0, 0))$ and $((0, 0), (\infty, \infty))$? (Very iffy on my assertion and my notation, sorry.)  Thanks! I have a filename in a format like:     system-source-yyyymmdd.dat   I'd like to be able to parse out the different bits of the filename using the "-" as a delimiter. How to flatten a non-planar face to a targeted plane? Let's take a non-planar quad here for a simple example, how to only move one vertex on it, to finally make it planar while keeping the other three vertices still?