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# E
We define the real number $e$ to be the number such that $$\displaystyle\int_1^e \dfrac{1}{t} \mathrm{d}t=1.$$ By the definition of the logarithm, we have $\log(e)=1$. The value of $e$ is $$e=2.71828182846\ldots.$$ | {} |
# Maximum number of vertices a polyhedron can have?
During my linear programming class we saw this theorem:
Theorem: Let $$A \in \mathbb{R}^{m \times n}$$ where $$\operatorname{rank}{(A)} = m \leq n$$ and let $$b \in \mathbb{R}^m-\{\bar{0}\}.$$ Then the vector $$\hat{x} \in \Omega = \{x \in \mathbb{R}^n : Ax = b, x \... | {} |
# Chapter 10 Arrays
(December 3, 2021)
A non-record array can be regarded as a collection of type compatible values, section 6.7. An array of records may contain scalar record values whose elements differ in their dimension sizes, but apart from that they must be of the same type. Such heterogenous arrays may only be... | {} |
Applications
import numpy as np
import matplotlib.pyplot as plt
import scipy.linalg as la
%matplotlib inline
Polynomial Interpolation
Polynomial interpolation finds the unique polynomial of degree $n$ which passes through $n+1$ points in the $xy$-plane. For example, two points in the $xy$-plane determine a line and... | {} |
# Infinite tube world
I'm inspired by this question and was thinking that it is nigh impossible for sun, moon and star to exist in this world and even if they do, there is no way to sun and moon to orbit and create day-night cycles.
So i came upon a solution, how about a infinite tube world like this :
Here is my wo... | {} |
# Dodgy Turing degrees
Below, I'm specifically interested in weak truth table (wtt) reducibility, but other reducibilities between truth table and Turing are interesting to me, too, if the question happens to be easier to answer for them.
Let $d$ be a Turing degree, and fix a representative $X\in d$. Say $d$ is (wtt-... | {} |
# Find the marginal distributions (PDFs) of a multivariate normal distribution
Let $\mathbf{x}\in\Bbb{R}^n$ be a multi-variate normal vector with mean $\bar{\mathbf{x}}\in\Bbb{R}^n$ and covariance matrix $\Sigma\in\Bbb{S}_{++}^n$, where $\Bbb{S}_{++}^n$ denotes the space of all $n\times n$ symetric posotive definite m... | {} |
UCSC different exome sets per each gene
2
0
Entering edit mode
2.4 years ago
cocchi.e89 ▴ 170
I'm trying to collect the exomes' start-end for a set of gene. I downloaded the UCSC tables, but I found out that different sets are outputted for each gene. As example UMOD gene:
#hg19.knownGene.name hg19.knownGene.chrom... | {} |
11:00 PM
Right, you can generalize Gaussian integers to other quadratic forms ...
Right, I mean the one by Cox
I don't know the number theory behind this but there are good asymptotics on the number of ways to write $n$ as sum of $4k$ squares, which I learnt a bit about today
anyone have a handy chart of which condi... | {} |
# Hodge Numbers of a Calabi Yau manifold
I was going through this, where on page 6, it is mentioned that on a $$2n$$ dimensional Calabi-Yau manifold, $$h_{(n,0)} = h_{(0,n)} = 1$$. What is the reason for this?
One way to prove this is by introducing a metric on the Calabi-Yau and to compute the set of all solutions t... | {} |
### Numerical study of the equation of state for two flavor QCD at finite density
Ejiri S, Allton CR, Kaczmarek O, Hands SJ, Laermann E, Karsch F, Schmidt C (2003) .
Preprint | Englisch
Es wurden keine Dateien hochgeladen. Nur Publikationsnachweis!
Autor*in
Abstract / Bemerkung
We discuss the equation of state for 2... | {} |
This op-amp circuit performs the sum of two input voltages. It is a way to do analog arithmetic on signals.
Created by Willy McAllister. | {} |
# patsy dmatrices() and statsmodels Logit() - the reference group and the intercept?
I want to understand what's going on with a categorical variable reference group generated using dmatrices(), when building logistic regression models with sm.Logit().
In my toy model I'm predicting the type of transmission (am) from... | {} |
matplotlib latex not working
pip3 install matplotlib Incase Python 2.7 or 3.4 versions are not installed for all users, the Microsoft Visual C++ 2008 (64 bit or 32 bit forPython 2.7) or Microsoft Visual C++ 2010 (64 bit or 32 bit for Python 3.4) redistributable packages need to be installed. Since Matplotlib is used i... | {} |
# yMPD brand new
Earlier I told you about ympd. With the version of SuperBFG7 a number of nice new features found the way to the code. Check it out!
Tagged with:
Posted in Linux, Raspberry Pi, Technik
# mount encrypted disk with systemd
I would like to share some snippets to have an encrypted HDD mounted when both ... | {} |
$\mathcal{E}\text{psolute}$: Efficiently Querying Databases While Providing Differential Privacy
Dmytro Bogatov, Georgios Kellaris, George Kollios, Kobbi Nissim, Adam O'Neill
As organizations struggle with processing vast amounts of information, outsourcing sensitive data to third parties becomes a necessity. To prot... | {} |
# Klüber Klüberflex 200-0 A/B Komp. A
### components
#### Your benefits at a glance
– Optimised friction behaviour of your wiper rubber
– Low cross-linking temperature, enabling use with temperature-sensitive elastomers such as CR, NR
– High flexibility in meeting your requirements
– Lower application costs
– No air... | {} |
What mass of phosphorus is contained in a 15.5*g mass of P_2O_5?
Mar 10, 2017
$\text{Mass of phosphorus} \cong 7 \cdot g$.
Explanation:
We need (i) to assess the molar quantity of ${P}_{4} {O}_{10}$ (which of course is the same as ${P}_{2} {O}_{5}$, and which formula we can use without loss of generality).
$\text{... | {} |
# How to superimpose rotated histograms and/or bell curves on the side of a scatterplot [closed]
Does anyone know how to superimpose a rotated density plot and/or histogram on the right-hand-side of a scatter plot? I'm agnostic about what software could be used to do this...ideally it would be R.
My primary goal is t... | {} |
## Reconciling Linux in an IIS Landscape
Despite having applied multiple updates to varied WordPress installs within the past year, I encountered an issue today with a caching plugin update requiring manual edits to server-side files that I had not come across before.
The particular plugin was W3 Total Cache, but I s... | {} |
# How to integrate a total differential along different paths?
Starting with the ideal gas equation:
$$V = RT/P$$, the exact differential is ($$R$$ is a constant):
$$dV = \frac{R}{P}dT + \frac{-RT}{P^2}dP$$
Show that $$dV$$ is an exact differential by integrating from $$(P_1, T_1)$$ to $$(P_2, T_2)$$ by two differe... | {} |
# Find the area of a region using Green's Theorem.
Let $R$ be the region enclosed by the curve parameterized by $g(t) = (t^4 - t^2, t^6 - t^2)$, where $0 \leq t \leq 1.$ Find the area of $R$ using Green's Theorem. In order to use the green's theorem, my text book says we need a vector field but this question does not ... | {} |
# Volume of a Sphere Question, really bothering me!
1. Jul 27, 2010
### mmmboh
I am trying to find the volume of a sphere using a different method than I have before, (I can do it other ways) but it's not working and I cannot figure out why.
[PLAIN]http://img824.imageshack.us/img824/9333/spheren.jpg [Broken]
That's... | {} |
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# help counting triangles
0
44
1
All the sides of a triangle have integer length. The perimeter of the triangle is $60$, and the triangle is isosceles. How many such non-congruent triangles are there? (A 3-4-5 triangleis is considered congruent to a 3-5-4 triangle because we can reflect and rotate the triangle... | {} |
# Levenshtein distance algorithm with bits
I need to write a function that gets an array of bytes at the input and 2 integers (minDist and maxDist). The calculation algorithm understands this field as a bit sequence starting from the LSB (least significant bit) of the first byte and ending with the MSB (the most signi... | {} |
# Topological regularity for toposes
A topological space $X$ is regular if a point not belonging to a closed set can be separated from it by disjoint opens. Equivalently, this means if $x\in U$ for an open set $U$, then there are opens $V$ and $W$ with $x\in W$, $V\cap W = \emptyset$, and $U \cup W = X$.
More general... | {} |
## Why is there no confidence in science journalism?
Living in the so-called anthropocene, meaningful participation in humanity’s trajectory requires scientific literacy. This requirement is a necessity at the population level, it is not enough for a small proportion of select individuals to develop this expertise, ap... | {} |
Government
If no presidential candidate wins a majority of electoral votes, who can choose the president. http://www.usconstitution.net/const.html#A2Sec1 In addition to the above excellent answer please consider the following. The lack of any candidate receiving a majority if the ...
random
I dunno. Why don't u wait ... | {} |
# Tag Info
A very simple example on a $2\times 2$ image $$I_0=\begin{bmatrix}a&b\\c&d\end{bmatrix}$$ with (very crude Gaussian) low-pass: $$g=1/4\begin{bmatrix}1&1\\1&1\end{bmatrix}$$ yields a downsampled $I_1$ after filtering, with only one pixel (out of 4): $$I_1=\begin{bmatrix}(a+b+c+d/4)\end{bmatrix}$$ It can be u... | {} |
# The operational model of allosteric modulation of pharmacological agonism
Sep 2, 2020
### The operational model of agonism
The pharmacological response to an agonist depends on the properties of the agonist and the system in which the response is measured. The operational model (OM) of agonism describes the system... | {} |
# ugarchspec-methods
0th
Percentile
##### function: Univariate GARCH Specification
Method for creating a univariate GARCH specification object prior to fitting.
Keywords
methods
##### Usage
ugarchspec(variance.model = list(model = "sGARCH", garchOrder = c(1, 1),
submodel = NULL, external.regressors = NULL, varianc... | {} |
Home @Html.Raw - Line breaks missing when assigning to json object
# @Html.Raw - Line breaks missing when assigning to json object
1#
I have the following code: data: { comment: { 'id': @Model.Id, 'description': "@Html.Raw(Model.Description)" }, }, But I get the following error in console: Uncaught SyntaxError: In... | {} |
Math Help - Derivative and normal
1. Derivative and normal
find an equation of the normal line to the curve
$y = 2 - (\frac{1}{3})x^2$ paralell to $x - y = 0$
i cant seem to find the slope of the normal line
im confused
answer at the back of book : $4x - 4y = 11$
find an equation of the normal line to the curve
$y... | {} |
# Improving Brain Computer Interface Prediction by Measuring Eye Position and Focus
Eye tracking devices allow patients with locked-in syndrome to communicate by tracking eye movement through infrared sensing. Can we use this in conjunction with BCIs to improve accuracy?
## Abstract
Including more information about ... | {} |
# obspy.taup.tau_branch.TauBranch.difference¶
TauBranch.difference(top_branch, index_p, index_s, s_mod, min_p_so_far, ray_params)[source]
Generates a new tau branch by “subtracting” the given tau branch from this tau branch (self). The given tau branch is assumed to by the upper part of this branch. index_p specifies... | {} |
# Allocation and reallocation of memory
I am programming a parallel tree algorithm where I have to send data to other processors. The amount of data is not constant. Therefore I have to work with dynamic arrays using malloc() and realloc(). Since I am new to C I wondered if I am doing it right. I do not get any error.... | {} |
# Aggregation Tutorial¶
In the last section, we inspected the structure of the data and displayed a few example values.
How do we get a deeper feel for the data? One of the most natural things to do is to create a summary of a large number of values. For example, you could ask:
• How many women are in the dataset? H... | {} |
# Happy Pi Day
March 14 (3.14) is Pi Day. As we all know, Pi (symbol: $\pi$) is a mathematical constant which is the ratio of the circumference of any circle to its diameter. That means that if we measure the circumference of a circle and divide it with its diameter, then the quotient is always $\pi$. The constant $\... | {} |
+0
# help!!!!difficult !!!!
0
136
5
$${e}^{-10/3x}+{e}^{-7/3x}+{e}^{-x}=0.15$$ , how to solve this ????? find x.
Guest Mar 6, 2018
#1
+92805
0
Are you sure you have copied it correctly?
Do you mean
$${e}^{(-10/3)x}+{e}^{(-7/3)x}+{e}^{-x}=0.15\qquad(1)\\~\\ or\\~\\ {e}^{-10/(3x)}+{e}^{-7/(3x)}+{e}^{-x}=0.15\qquad... | {} |
# Limits , Continuity & Differentiability
### LIMITS :
Let y = f(x) be a given function defined in the neighbourhood of x = a, but not necessarily at the point x = a.
Basically we are interested in examining the behaviour (or tendency) of the function f(x) when the distance between the points x and a is small, i.e. ... | {} |
Try out our new practice tests completely free!
Solved
# A Survey Asked 915 People How Many Times Per Week $\sigma _ { x ^ { * } }$
Question 15
Multiple Choice
Question 15
Multiple Choice
## A survey asked 915 people how many times per week they dine out at a restaurant. The results are presented in the following ta... | {} |
# data normalization after dimension reduction for classification
The classifier is KNN or RBF-SVM. After doing dimension reduction (e.g., PCA, LDA or KPCA, KLDA), does it need to do normalization before classification?
In LIBSVM package, it always needs to first use svm-scale to normalize the features using min-max ... | {} |
Filed under:
# Fantasy Baseball: Early Mock Draft-Round 2, Pick 4
In the early rounds of drafts, one must focus on drafting guys that provide power and average as much as possible once all the 4-5 category players are off the board. I was tempted to draft Mark Reynolds here, but will instead go with the Yankees Mark ... | {} |
# The left end of a long glass rod 6.00cm in diameter has a convex
1. Jun 30, 2012
### sckeen1988
The left end of a long glass rod 6.00cm in diameter has a convex hemispherical surface 3.00cm in radius. The refractive index of the glass is 1.60. Distances are measured from the vertex of the hemispherical surface.
A... | {} |
# Introduction to MATLAB
Please feel free to raise any comments or issues on the website’s Github repository. Pull requests are very much appreciated.
## Description
A quick tutorial on MATLAB and the most important features that one uses in Macroeconomics or for Dynare.
## Topics
• Default layout of MATLAB
• ... | {} |
# Find this inequality by finding the generalizating one too
Given $$x,\,y,\,z$$ such that $$x,\,y,\,z\in [\,1,\,8\,].$$ Prove$$:$$ $$\frac{x}{y}+ \frac{y}{z}+ \frac{z}{x}\geqq \frac{2\,x}{y+ z}+ \frac{2\,y}{z+ x}+ \frac{2\,z}{x+ y}$$ By computer$$,$$ I have found the generalization of the above inequality $$($$If you... | {} |
## European Identities in the Cloud
As previously reported on this blog, my PhD student and I are doing a CATI survey on European Identities. We opted for queXS (an open source CATI front-end for Limesurvey) and chose a solution hosted by the Australian Consortium for Social and Political Research on Amazon’s network.... | {} |
# Higher math and statistics/probability
So I've heard that certain areas of statistics and probability use manifolds and results from analysis and topology.
Given that I lack the background to see where manifolds would become useful in these fields, I was wondering if someone could provide me with an example illustr... | {} |
## Soup search results
For discussion of specific patterns or specific families of patterns, both newly-discovered and well-known.
### Re: Soup search results
dvgrn says:
The exponential curve is painfully bumpy, not nice and smooth.
If the number of methusalehs in successive bins approximates to a power law, then ... | {} |
# Dynamic power dissipation of a Cmos inverter with relation to it's geometry
I know that the dynamic power dissipation of a CMOS inverter is defined by the equation: Pd = (Cl)(Vdd^2)(fb). My teacher challenged us to find ways to reduce power dissipation besides the obvious ones (reduce bitrate, Vdd, etc.), and appare... | {} |
Integer type: int32 int64 nag_int show int32 show int32 show int64 show int64 show nag_int show nag_int
Chapter Contents
Chapter Introduction
NAG Toolbox
# NAG Toolbox: nag_ode_bvp_fd_nonlin_fixedbc (d02ga)
## Purpose
nag_ode_bvp_fd_nonlin_fixedbc (d02ga) solves a two-point boundary value problem with assi... | {} |
BIT. Nordisk Tidskrift for Informationsbehandling
Short Title: BIT, Nord. Tidskr. Inf.-behandl. Parallel Title: BIT, Nordic Journal of Information Processing Publisher: Scandinavian Computer Societies, Copenhagen, Denmark ISSN: 0006-3835; 1572-9125/e Online: http://link.springer.com/journal/volumesAndIssues/10543 Suc... | {} |
# There are four charged bodies A, B, C, and D with charges $+Q, +2Q, +3Q,$ and $+4Q$ respectively. A unit positive charged particle is brought near each charged body one by one.Which charged body will exert the maximum force on the unit positive charge?
D body will exert the maximum force on the unit positive charge
... | {} |
시간 제한메모리 제한제출정답맞은 사람정답 비율
2 초 512 MB0000.000%
## 문제
Mr. Docriz has $n$ different kinds of objects indexed by $1, 2, \ldots, n$. An object of the $i$-th kind weighs $i$ kilograms. For each $i$, Mr. Docriz has $b_i$ objects of the $i$-th kind. Among those objects, there are $a_i$ precious objects, and the remaining one... | {} |
# Have there been any determinations of the water pressure in Europa's ocean just below the ice?
In this answer there is discussion of the possible role of pressure at the top of Europa's ocean in the ability of the recently observed vapor plumes to reach 100 to 200 kilometers above the surface. Europa has a surface g... | {} |
4 edited tags
Hello. Here's a question that originates from StackOverflow (and the SO crowd isn't really qualified to solve it).
We're given two lines on the plane, each of them has at least two integer points (i.e. points (b,a) $(b,a)$ where b $b$ and a $a$ are in \mathbb{Z}). $\mathbb{Z}$). The lines aren't paralle... | {} |
# Algorithm for a special case of SAT/#SAT
Does anyone know of an algorithm that can solve the following special case of SAT in polynomial time? Are there any algorithms that can solve the counting (#SAT) version of it in polynomial time?
Special case: If clause $a$ and clause $b$ have one or more variables in common... | {} |
## Forum archive 2000-2006
### Michael Gage - inv_romberg
by Arnold Pizer -
Number of replies: 0
inv_romberg topic started 8/28/2001; 8:18:46 PMlast post 8/28/2001; 8:18:46 PM
Michael Gage - inv_romberg
8/28/2001; 8:18:46 PM (reads: 1845, responses: 0)
### inv_romberg
Syntax
$right_hand_endpoint = inv_romberg($rf_... | {} |
#### EXISTENCE OF TRAVELING-WAVE SOLUTIONS TO BOUSSINESQ SYSTEMS
In this manuscript, the existence of traveling-wave solutions to Boussinesq systems \eta_t + u_x + (\eta u)_x + a u_{xxx}-b \eta_{xxt} = 0, u_t +\eta_x + uu_x + c\eta_{xxx}- d u_{xxt} = 0, is established. We prove that all the systems with a<0, c<0 and b... | {} |
Supervised machine learning is a process to automatically extract rules from a coded dataset, which subsequently can be applied to a thus far not coded dataset. Typically, a conventional manual content analysis is carried out first, within which human coders annotate a sample of texts to one or more categories on the b... | {} |
# Understanding some basics
Let $x_1,\ldots,x_n$ be any numbers and $\bar{x} = (x_1+ \ldots + x_n)/n$. Then I need to prove that $$min_a \sum_{i=1}^n (x_i - a)^2 = \sum_{i=1}^n (x_i - \bar{x})^2$$
I do not need the answer but I need an visual/intuitive understanding of the question. I do not understand what min$_a$ m... | {} |
# Is it correct that a jet fighter can be used as a non-lethal (sonic) weapon?
Imagine you have a crowd of people, who want to go to a certain territory (e. g. close to the border). An airplane flies over them such that when it reaches supersonic speed, there is a loud bang. People hear it, it hurts, and for several d... | {} |
# Why is the index of the stabilizer neccesarily greater than 1?
I am currently self-studying Aluffi's Algebra book at chapter IV on on Group actions in which he gives the counting formula where $$G$$ is a group that acts on a finite set $$S$$ being:
$$\lvert S \rvert = \lvert Z \rvert + \sum_{a \in A} [G: G_a],$$
w... | {} |
# Biological Physics/Boyle's Law
Boyle's Law states that the volume and pressure are inversely proportional. This means that as the volume of gas in a container decreases, the pressure increases. To test Boyle's Law a syringe was attached to a pressure meter and weights were added to the plunger to show the relationsh... | {} |
# What is the difference between \def and \newcommand?
Inspired by a question about \let and \def, I have some that essentially all boil down to asking
What are the differences between \def and \newcommand?
In particular, I wonder
1. Is it possible to have parameters passed to \defed commands, both optional and req... | {} |
# Drawing images
New in Analytica 5.0
## Drawing images
The canvas functions are used to draw your own images, so called because the names of all the drawing functions start with Canvas. In an expression, you can draw lines, rectangles, ellipses, text, and other images to the canvas, and then once you've finished dr... | {} |
The effect of the dispersal kernel on isolation-by-distance in a continuous population
Tara N. Furstenau and Reed A. Cartwright
Abstract
Under models of isolation-by-distance, population structure is determined by the probability of identity-by-descent between pairs of genes according to the geographic distance betw... | {} |
# Carbon 14 dating is inaccurate
Claim cd011: carbon-14 dating gives unreliable results source: lee, robert e, 1981 radiocarbon: ages in error not the carbon-14 dating method. What are the ways that carbon dating can be inaccurate or other materials that are exposed to in situ radiation--which of course produced detec... | {} |
# An Accurate Performance Analysis for Regenerative Multi-hop Relaying in Wireless Networks Over Composite Multipath/Shadowed Fading
An Accurate Performance Analysis for Regenerative Multi-hop Relaying in Wireless Networks Over... This paper presents and evaluates the performance of wireless networks that utilize the ... | {} |
# Why don't these even/odd mode transmission line results math up?
In Pozar's Microwave Engineering, he analyzes the Wilkinson power divider using even-odd mode analysis. His results match the expected values and power conservation is satisfied. Similar derivations can be found online. Here's where I'm losing the anal... | {} |
# Arb example programs, rigorous calculus
September 26, 2013
I have starting adding example programs to Arb. Right now the following programs are available:
• pi.c – computes $\pi$ to any precision (this is mandatory to have…)
• hilbert_matrix.c – computes determinants of huge Hilbert matrices with adaptive precisio... | {} |
# Does unitarity imply conservation of energy?
Not too long ago, someone began to discuss the thinking and motivation behind the Lagrangian and its formalism for the Newtonian framework and an intuitive understanding of such formalism. Somehow, it ended in the case that the Lagrangian can be understood in terms of con... | {} |
# Thread: Determinant of a complex matrix
1. ## Determinant of a complex matrix
I have been given a 3x3 complex matrix and been told to find the determinant of (A-[lamba]I), which I have calculated (and double and triple checked) to be the following:
-lambda^3 + w^2[lambda] + u^2[lambda] + v^2[lambda] + 2uvw
where ... | {} |
## A community for students. Sign up today
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## connor50 2 years ago A certain shade of blue has a frequency of 7.04 × 1014 Hz. What is the energy of exactly one photon of this light?
• This Question is Closed
1. JFraser
$E = h*\nu$ plug in, h = 6.626x10^-34J*s
#### Ask your own q... | {} |
# What to do with a used helicopter jet engine?
brewnog
Gold Member
Noooooooooooooooooooooooooooo!
That thing looks awesome, in a very, very scary way. Wonder what it sounds like?
Moonbear
Staff Emeritus
Gold Member
It does look slick. At least the future Darwin Award winners will go in style.
Pengwuino
Gold Member... | {} |
# A question about Cayley–Hamilton theorem [duplicate]
In wikipedia "In linear algebra, the Cayley–Hamilton theorem (named after the mathematicians Arthur Cayley and William Rowan Hamilton) states that every square matrix over a commutative ring (such as the real or complex field) satisfies its own characteristic equa... | {} |
×
# Requests and Suggestion
I had originally posted this two weeks ago but am reposting because I did not get any reply from the staff. This was exactly I had posted.
I think...........
That on the home page, all the new problems must be sorted according to categories, instead of all type of problems mixed up on a ... | {} |
# 14.4 The Normal Distribution
## Presentation on theme: "14.4 The Normal Distribution"— Presentation transcript:
14.4 The Normal Distribution
Probability and Statistics
Normal Distribution or Normal Curve
Most common distribution in real-life and in statistics Curve Shaped AKA: Bell-Curve
Properties of a Normal Di... | {} |
# How to solve 1+4.x=-5+7.x
###### Question:
How to solve 1+4.x=-5+7.x
### Which of the following gave the sumerians a great advantage in trade?
Which of the following gave the sumerians a great advantage in trade?...
### Excerpt from Edgar Allan Poe & Jack LondonSarah PostIn his short story 'The Black Cat,' Edgar... | {} |
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# KCI crystallises in the same type of lattice as does NaCl. Given that $\large\frac{r_{k^+}}{r_{cl^-}} =$$0.74 and \large\frac{r_{k^+}}{r_{cl^-}}$$=0.74$. Calculate the ratio of the side of the unit cell for KCl to that of NaCl.
Can you answer this q... | {} |
# Given a dependent variable how can I determine the relative effect of several independent variables to its value?
Say I have a series of N observations, and for each observation, I have 4 variables: $$x$$, $$y$$, $$z$$, and $$q$$, where $$q$$'s value depends on at least two of the other variables.
How can I establi... | {} |
# Quantum Mechanics: total angular momentum of an electron in a hydrogen atom
1. Mar 25, 2009
### bdizzle329
An electron in a hydrogen atom occupies the combined position and spin state.
$$\Psi$$$$\left(\vec{r},\xi\right)$$=$$\left(\sqrt{1/3}Y^{1}_{0}\xi_{+}+\sqrt{2/3}Y^{1}_{1}\xi_{-}\right)$$
What are the possibl... | {} |
# Gas station without pumps
## 2015 April 23
### Very long couple of days
Yesterday and today have been draining.
Yesterday, I had three classes each 70 minutes long: banana slug genomics, applied electronics for bioengineers, and a guest lecture for another class on protein structure. I also had my usual 2 hours ... | {} |
# Real and virtual polymorphism of titanium selenide with robust interatomic potentials
### Abstract
The first successful pairwise potential for a layered material, TiSe$_2$, has been parameterised to fit the experimental data, using a genetic algorithm as the optimisation tool for the parameters of the interatomic p... | {} |
# Integration of lnx
In this tutorial we shall explain integration of the natural logarithmic function $\ln x$. It is an important integral function, but there is no direct method to find it. We shall find the integration of $lnx$ by using the integration by parts method.
The integration of $lnx$ is of the form
$I = ... | {} |
# What's wrong with America's high schools?
### Help Support The Rocketry Forum:
#### dixontj93060
##### Well-Known Member
Work ethic in the U.S. is gone.
Entitlement rules.
#### RocketT.Coyote
##### Well-Known Member
It's a "Head 'Em Up & Move 'Em Out" approach in public education these days. Also, the new-new ... | {} |
]> On Conic Sections, Conservation of Angular momentum and Kepler's Second Law
Tools Glossary Index Up Previous Next
## On Conic Sections, Conservation of Angular momentum and Kepler's Second Law
Consider a cone whose axis is the z-axis, and whose points obey the equation
$z = r$
A conic sect... | {} |
Defining commands using two loops
I would like to define a series of command using two loops.
For instance I want to create a series of variables that can have YY or NN as subscripts.
I would like to define commands \yy and \nn that puts those letters as UPPER CASE subscripts.
Following this solution, I use Tikz / ... | {} |
## Archive for August, 2017
### Intransitive dice VII — aiming for further results
August 12, 2017
While Polymath13 has (barring a mistake that we have not noticed) led to an interesting and clearly publishable result, there are some obvious follow-up questions that we would be wrong not to try to answer before fini... | {} |
# PoS(DIS2017)225
Measurement of Transverse Spin Transfer of Lambda and anti-Lambda Hyperons in Polarized Proton+Proton Collisions at STAR
J. Mei, on behalf of the STAR collaboration
Contribution: pdf
Abstract
The transverse spin transfer of $\Lambda$ hyperons in proton+proton collisions can provide insights into ... | {} |
# Questions tagged [quantum-computing]
Quantum computation and computational issues related to quantum mechanics
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### Are there problems that can be solved in time $2^{n-q^c}$ with $q$ qubits?
This is another attempt to formalize my former question on the topic... | {} |
# Is this a better way to validate a text box for mobile number only?
Is this a better way to validate a text box for mobile number only?
Validation:
• allow only numbers
• will not allow to paste string including characters
• allow copy from the box
• length is set to 10 without country code
• allow back space
Sug... | {} |
# Homework Help: Odd Gauss's Law question
1. Jan 27, 2010
### mdxyz
1. The problem statement, all variables and given/known data
Calculate E inside and outside an infinite cylinder of uniform volume charge density using the differential form of Gauss's law.
2. Relevant equations
$$\nabla$$ E = $$\frac{p}{e0}$$
p... | {} |
# pingouin.mediation_analysis
pingouin.mediation_analysis(data=None, x=None, m=None, y=None, covar=None, alpha=0.05, n_boot=500, seed=None, return_dist=False)[source]
Mediation analysis using a bias-correct non-parametric bootstrap method.
Parameters
datapd.DataFrame
Dataframe.
xstr
Column name in data containing... | {} |
## Journal of Mathematics of Kyoto University
### Weak approximation, Brauer and $R$-equivalence in algebraic groups over arithmetical fields
Nguyêñ Quôć Thǎńg
#### Abstract
We prove some new relations between weak approximation and some rational equivalence relations (Brauer and R-equivalence) in algebraic groups ... | {} |
• ### Observation of an Antimatter Hypernucleus(1003.2030)
March 10, 2010 nucl-ex
Nuclear collisions recreate conditions in the universe microseconds after the Big Bang. Only a very small fraction of the emitted fragments are light nuclei, but these states are of fundamental interest. We report the observation of anti... | {} |
The BO approximation never explicitly addresses electronic or nuclear dynamics, but neglecting the nuclear kinetic energy to obtain potential energy surfaces has implicit dynamical consequences. As we discussed for our $$\ce{NaCl}$$ example, moving the neutral atoms together slowly allows electrons to completely equili... | {} |
# Removing cells zero for a gene from a scRNA-seq data
I have a big single-cell RNA seq data
> dput(head(new.dat[,1:10]))
structure(list(cell1 = c(0.793763840992639, 0, 1.96843530982957,
0.461736429639991, 0.717968540649498, 0), cell2 = c(3.61741696702738,
0.231662370550224, 0, 0, 0, 0), cell3 = c(4.14348883366621, 0... | {} |
# Generating vertices of a simplex
For a model I’ve been working on I needed to generate points (cluster centres) that were located equidistant from each other. Not a terribly hard problem, but I happen to come across this answer on mathoverflow that I found pretty neat. I readily admit that I don’t understand exactly... | {} |
# Sustainable growth in the long run [closed]
Suppose that, in addition to physical capital and labour, an economy requires a fixed factor and a non-renewable resource to produce the final good. Prove that an economy with these input requirements may still be able to sustain growth in the long run.
What I think is th... | {} |
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