What are the performance implications of Hyper-threading for single Nehalem+ CPU?
Can you help me with my capacity planning?
Why does water pouring from a glass sometimes travel down the side of the glass? Why are there both Static and Kinetic Friction? When dragging an object, there is a greater start-up force than the force it takes to keep it moving. Why is this? Why are there two different values for friction? Accessing derived class property members from base class object in CSharp !! c operator, is a two NOT? Schrödinger Equation for Two Electrons? I'm having trouble finding a simple answer to this question (maybe because there isn't one), but I'm just confused about how the Schrödinger Equation would look for two electrons. I understand that it would exist in 6 dimensional configuration space, but how does the potential look? It's confusing that the potential would be different for each electron depending on where the other one is. Why should I avoid multiple inheritance in C++? Is it a good concept to use multiple inheritance or can I do other things instead? Global variables in AngularJS Experiment to find structure of water Who first determined the structure of water (two hydrogen atoms stuck to an oxygen atom at approx 105 degrees), and, more importantly, how was this done? I'm studying molecular biology and I'm trying to understand an experiment which shows the importance of promoters in the relative transcription level (RT). The image below comes from Rolf Knippers' book "Molekulare Genetik" (8th edition).    The legend says (among other things):     Die erste Zeile gibt die normale "Wildtyp"-Sequenz der 5'-flankierenden Region wieder.   Which, in english, means something like:     The first line repeats the normal wild-type sequence of the 5' flanking region.   The column on the right gives the relative transcription (RT) level, 1.0 being the highest possible level of transcription. As we can see, the lines where some parts of the "5' region" have been deleted give quite low RT levels, since some regions of the promoter are missing.  My questions are the following:  1) According to  and , I understand that RNA polymerase reads and uses both coding and non-coding strands in order to synthesize RNA. Therefore, how did they manage to use the sequences strands regions had been deleted to make a polymerase "read them" and perform transcription?  2) If the polymerase reads the template strand in the 3' -> 5' sense, shouldn't we talk of "ATAT box" or "TAAC box" instead of "TATA" or "CAAT" boxes? Does it mean that the "promoter" regions they are using on the graphic above are actually on the coding strand?  Thanks a lot for your help. Round function in Excel, worksheet function vs VBA I have several spreadsheets with information I need to consolidate, each with different (and sometimes overlapping) portions of the final data set I'm hoping to create. Typically, combining spreadsheets with similar data is easy to do by dumping all the data into one sheet and using Remove Duplicates. However, I want to make sure that the line items which are left represent the latest version of the duplicates.  I will be importing the following data from each spreadsheet:   A unique identifier field, (UID) which identifies the subject of the line item and will be used to spot duplicates between the input sheets. A status field, (STATUS) which will have information about the item called out in the unique identifier field. A date field, (DATE) which will contain the date the imported data was originally written.   What I need is for my output to contain only one line item for each UID, and have data from the STATUS field which matches the most recent DATE for that UID from the input sheets.  What is the easiest way to do this in Excel? Java - Method name collision in interface implementation How to pack the game files into one without using any file compressor? Well, one example is this file of the game The Sims 2 for PS2: quickdat.arc. The file contains this .arc extension, but it's no one an archive file and it contains some data of the game inside. How can I do this? Put so many files in one?  How to do something like this? All the game files inside one without using a file compressor? I wanted to show that $X' / U^\perp \cong U'$, for $U$ being a closed subspace of the Banach space $X$.  Therefore I looked at $l: X' / U^\perp \cong U' , x' + U^\perp=[x']  \mapsto x'|_U$.  It is clear that this map is onto, as we just take a $u' \in U'$. Then I can use Hahn-Banach to get an appropriate $x'$ such that $x'|_U = u'$ and in particular $||x'||=||u'||$.  Now I need to show that is isometric: since we always have $\|[x']\|\le \|x'\|$ and by Hahn-Banach we have $\|x'\|=\|x'_{|U}\|$, this shows $\|[x′]\|\le \|x'_{|D}\|$ and it should be always true that $\forall y' \in U^\perp: \|x'-y'\| \ge \|x'_{|D}\|$, hence $\|[x']\|\ge \|x'_{|D}\|$. Is this reasoning correct? The isometric property follows. How can I restrict a user on the SSH server to allow them only the privileges for ? i.e. So they cannot run commands even if they log in via SSH.  My Linux servers are Ubuntu 11.04 and OpenWrt. How to check if a service is running on Android? How do I check if a background service is running?  I want an Android activity that toggles the state of the service -- it lets me turn it on if it is off and off if it is on. From the spell description:     Sleep (...) Creatures within 20 feet of a point you choose within range are affected in ascending order of their current hit points (ignoring unconscious creatures). Starting with the creature that has the lowest current hit points,(...) Subtract each creature’s hit points from the total before moving on to the creature with the next lowest hit points. A creature’s hit points must be equal to or less than the remaining total for that creature   to be affected. Undead and creatures immune to being charmed aren’t affected by this spell. (PH p.276)   Now, to build the ascending order of their current hitpoints, the spell instructs to count everyone in area of effect, but only ignore unconscous creatures. Then later on it says that Undead and creatures immune to being charmed aren't affected.  Are those two latter kinds of creatures excluded from the roll of current HP by default? Following the "if they were it would say so" philosophy of Sage Advice, it doesn't seem so to me. Order of items in a context menu I would like to do two things   Increase the size of inmargin area (i.e., customize inner sidebar so that more contents could fit there) Reduce the empty space between the title of block environment and the slide edge (from the example below, the title of block has too much of wasted space to its left which could be used to create more readable sentences)     MWE  \documentclass[xcolor={x11names}]{beamer}  \usecolortheme{structure} \useinnertheme{rectangles} \useinnertheme{inmargin}  \usecolortheme{crane}  \usefonttheme{structurebold}   \usepackage{fontspec}  \usepackage{calc}  \usepackage[inline]{enumitem} % Description list defaults      % To change font     \newcommand{\descriptionfont}{\fontencoding{T1} \fontfamily{bch} \selectfont}      % Label indentation     \newcommand{\descLabOffset}{\widthof{\hspace{2.6mm}}}      % Left of description aligned with the left margin     \newcommand{\descLeftLabMarInd}{0mm - \descLabOffset}      % Left of description aligned with \parindent     \newcommand{\descLeftLabParInd}{\parindent - \descLabOffset}      % Set the list options     \setlist[description, 1]{font=\descriptionfont, leftmargin=*, labelsep=3mm, labelindent=\descLeftLabMarInd, align=left}  \begin{document}   \begin{frame}{Induction Motors}      \begin{block}{Why is induction motor very common?}          Induction motors are very practical for the following reasons          \begin{description}             \item[Rigid] Rigid             \item[Cheap] Cheap             \item[Low Maintenance] Low Maintenance             \item[Self-Starting] Self-starting             \item[No Excitation Needed] No Excitation Needed         \end{description}      \end{block}  \end{frame}  \end{document} I mean are we certain that they will be able to provide us a huge improvements (in some tasks) compared to clasical computers?