Data Definition and 998 Threads

First I'll give some context about how the book's written as many books are presenting it in different ways. Reference: CRYPTOGRAPHY AND INFORMATION SECURITY, THIRD EDITION By PACHGHARE, V. K. Confusions: 1) Why is Expansion Permutation called so? The name sounds very contrary to what...

I'm running raw data and although, visually, the trends are promising, none of it is statistically significant. I was just going to leave it at that because the data was obtained after only 1 year of the experiment and I was just going to say that if treatment continued for a longer period of...

Hi PF! The autocorrelation coefficient ##\rho## is defined as $$\rho_k \equiv \frac{\sum_{t=k+1}^T (x_t - \bar x)(x_{t-k} - \bar x)}{\sum_{t=1}^T(x_t-\bar x)^2}$$ Now suppose we calculate ##\rho## through ##T##, but are then given a new data at time ##T + \Delta t##. Is there a way to...

[Mentor Note -- PF thread and MHB threads merged together below due to MHB forum merger with PF] I have to learn in context of lucene, but firstly, I want to learn the example indexing in general. Sth like this-: And I am not getting any google books and pdfs to learn about these topics. I...

I have a 3 data column ##(X, Y, Z)## ranges from ##(min, max)##. For example, ##X = (0, 5)##, ##Y=(0, 3)##, ##Z=(0, 2)##. By using them I need to create a numpy array in the form of ##[(0, 0, 0), (0, 0, 1), (0, 0, 2), (0, 1, 0), (0, 1, 1), (0, 1, 2), (0, 2, 0)...]## So in total there will be...

This video ... ... At around 01:26 they say that data to and from the Google apps server goes across unencrypted. Is that true, given that all these services are necessarily over HTTPS ? On a related note, does a VPN layer add any value in terms of data security, above that provided by HTTPS ?

Does anyone have a clue what the gold points and associated lines represent? I notice that all the gold lines form closed loops (so they're not travel paths) and they cross themselves (so they're not contours). I can't think of any type of data that would result in this. I've tried to follow...

Hi PF! I'm going through a backtracking tutorial here. That code runs well for me, and is below: %% LOAD DATA % Read a table of daily adjusted close prices for 2006 DJIA stocks. T = readtable('dowPortfolio.xlsx'); % For readability, use only 15 of the 30 DJI component stocks. assetSymbols =...

Hello! I have a super tricky problem for everyone I truly hope there is an answer to this. I have different data sets all of which are a different amount of number per set (total points per set) Each number is multiplied by 4.86 then rounded down. Then the total is added Alternatively the sum...

The demo here doesn't specify how to download the file dowPortfolio.xlsx from the first line in the tutorial: T = readtable('dowPortfolio.xlsx'); Any help here (please tell me it's not just me)? Nevermind, evidently you literally can just copy that line into the command window and MATLAB...

Well I just checked out my boy's breed of dog. Not what we expected...But the analysis came with some raw data, 200,000 base pairs on ... 41 chromosomes. They're in a .TPED file, which can be opened in Excel. Apparently, it an also be analyzed using PLINK software. Wondering what I can do to...

Hello! I have 2 measured data points (they are measurements of different observable, not 2 measurement of the same observable), with quite different errors, say ##x_1 = 100 \pm 1## and ##x_2 = 94 \pm 10##. I want to compute the value (and associated uncertainty) of a linear combination of them...

I am studying a flow going through an orifice. I am aimed at overlapping the plots for the speed distribution over the vertical width profile (which is 0.015 m long; highlighted in red) for two downstream, horizontal distances [w.r.t. the orifice]: 0.01 m and 0.03 m. The result should look...

Hello all, I have written a VDM for my Masters thesis, unfortunately, since I am from a discipline other than mechanical engineering I don't have access to reliable validation material or a way to produce it (moreover, we don't have an actual vehicle testing lab/area at the U that I know of)...

If a company has a data breach what are the privacy/legal and ethical factors that the business has to take into consideration? Researching I've seen that most laws require disclosure of the data breach if it contains personal information. EU laws are the most strict. Failure to disclose...

For a week I've been seeing Russian allegations that the U.S. was researching bioweapons in the Ukraine. Today's example specifically targets a company, Metabiota. To be clear, I have seen nothing persuasive so far, for the following reasons: Metabiota's entire role is to track emerging...

Hi all I want to develop a miniature system using GPS receiver, a micro-controller, an RF transmitter and its receiver. The idea is to acquire lat/long of buoy dropped in sea which is equipped with miniature GPS receiver (with associated circuitry) which can send its position (lat/long data) to...

cold start-: system requires huge amt of current user data to make accurate predictions early rater-: new user hasn't rated many items to make predictions. both same? isn't it?

Does anyone know where to find information (or software or calculator) able to show on which days / time (2021) where Mercury (and other planets) are as low/high as possible on the heliocentric latitude For example: like the animation seen in the link below. The problem with this site is that...

On September 8, 2019, the 200m long vehicle carrier ship Golden Ray (carrying 4067 Kia, Chevrolet, GMC, GM, Mercedes-Benz, and Ram vehicles) capsized in St. Simons Sound, Georgia, USA The accident caused the loss of a $62 million ship, $142 million in lost cargo, and $250 million in salvage...

Homework Statement:: See attached Relevant Equations:: analysis stats Find below a sample of the data that i want to import onto spss; My intention is to have the data appearing as one variable only on PSPP. This is how it appears on PSPP; It defaults as 5 variables, ...i used comma...

What is 1 example of use of distributed system in big data? Here are the notes in my college curriculum, which I of course understand but it doesn't make clear what is the role of distributed system in big data-...

Here are the notes in my college curriculum, which I of course understand but it doesn't make clear what is the role of distributed system in big data-...

I am learning about 3 V's of big data. I am learning about variety at the moment. They say variety represents variety of formats, data sources and structures. I understand format might be txt, audio, video files etc. Sources might be different sources of data. But what is structures of data?

I am learning about 3 V's of big data. I am learning about variety at the moment. They say variety represents variety of formats, data sources and structures. I understand format might be txt, audio, video files etc. Sources might be different sources of data. But what is structures of data? I...

Can the microtubule, due to its symmetry and conservation laws (Noether’s theorem), be a good candidate for data storage?

Is data science in demand? Is data science hard? How many hours do data scientists work? Is it hard to find a job as a data scientist?

I'm not sure if this belongs to astronomy or GR. But as it - once again - proves Einstein right, I posted it here for all who need another paper to conquer all who doubt. And I think it is an interesting paper (53 pages), at least from my layman's point of view...

Suppose that I can generate the result of a function ## c_{x,y}=f(x,y)## by a method not involving the function ##f##. I need to find ##f(x,y)## now. The expression of ##f(x,y)## is expected to contain basic algebra operation (+-*/), power, absolute value and factorial. I have tried to find it...

Hi, So say I have some data to process. I am trying, say, Linear/Multilinear Regression. I know how to do this within Python Pandas. I can learn how with Tensorflow (TF). Would TF produce the same output given the "right" choice of Activation Functions *? Or would it output a model that is...

Dear Everybody, I need some help understanding how to use pade approximations with a given data points (See the attachment for the data). Here is the basic derivation of pade approximation read the Derivation of Pade Approximate. I am confused on how to find a f(x) to the data or is there a...

See the grouped data below; I just want to be certain that i have followed the correct step in trying to find skewness of the grouped data.

Hi, Is there any tutorial or pdfs that can help me with the MCNP output data? I'm working on the criticality of the SCWR, and I designed the fuel assembly and run it on the MCNP, but I have no idea about data extraction.

I bought a thing the size of a pack of cigarettes that holds 2 terabytes. My question is, in what year was the total electronic data storage of the entire world equal to 2 terabytes?

https://www.theregister.com/2021/11/15/wireless_information_transfer_with_fast_neutrons/ https://www.sciencedirect.com/science/article/pii/S0168900221009013 Not sure there are any practical uses, but interesting none the less...

At the end of the measurement I made with a detector, I only have the energy and count values as in the attached excel file. How can I find the peak values with the data I have and calculate the efficiency?

I want to code up a (physical) model of an aircraft or car, and I want to create an automated integrated test to check that the code produces reasonable and realistic results. For example, I want to check that the path taken by the aircraft or car is physical and reasonable. However, I don't...

Do smartphone users get good cellular service as well as good cellular data while on a moving passenger train? This is assuming no wi-fi available.

Hey guys, I've about a week left to submit my final paper for my trade degree in transportation. The paper is about an analysis of potential implementation of an electric car for direct deliveries in my area where I live. In part of it, I try to analyze how many possible trips a car like...

An article of data scientist Elizabeth Bik and her efforts to unmask the bad science surrounding Hydrochloraquin https://www.buzzfeednews.com/article/stephaniemlee/elisabeth-bik-didier-raoult-hydroxychloroquine-study and some biographic info on Dr Bik: https://en.wikipedia.org/wiki/Elisabeth_Bik

One of the Standard Model's rules is that charged leptons (i.e. the electron, muon and tau lepton) are identical to each other in their properties except for their masses (and that their anti-particles are identical to them except for a charge-parity flip). But, in two kinds of rare...

I would like to try the photometric transform given in my book, for instance ##V = y - 0.12[(b-y) - 0.55]^2##, however, the two catalogs I've consulted, Paunzen, 2015 and Hauck, 1997 only provides the indices. Do these catalogs provide the uvby magnitudes as well, just hidden somewhere? Are...

We are working on new software for one of our measurement systems (written in Python). The new system is capable of measuring more devices simultaneously than before so keeping track of what we are doing is important; it will also be more automated. One of the things we want to implement is...

Hi, I was watching the following video. So, a low Earth orbit continuously transmits data to a geosynchronous satellite via a laser link. The geosynchronous satellite relays the data to a ground station on Earth via a radio link. In case of European Data Relay System (EDRS) laser communication...

So i have a folder with a lot of data/information. Basically what i have is approximatelly 2k 2upla of x and y, because i need to find the function that describe the behavior of these data. Of course, i can use a program/software to fix/adjust the curve using the concept of OLS... BTW. The...

The following figure shows observed distance modulus (µ) vs. redshift (z) data (references of data sources are available): How well do cosmological models, such as ΛCDM and models based on non-expanding universe, explain these observed data? For explanation of terms, please see, Type Ia...

I wonder how to accurately perform data compression on the m x n matrix X using PCA. Each row is a data point, and each column is a feature. So m data points with n features. If I like to go k < n dimensions, how is the correct way of doing so? How to I accurately create the matrix W_k, which...

Apparently, DS can be applied to the Aero industry, but how is a question that I still can't find an answer, and which proves to be incredibly elusive online. I don't mean the Business Intelligence positions, I want to get more involved with the engineering team. Can a Data Scientist be useful...

Hey! :giggle: Analyst has collected the following data on the performance of the $X$ stock for $10$ different years. a) Calculate the arithmetic mean, the median, the mode, the standard deviation, the coefficient of variability and of asymmetry. You interpreted your results. b) Does the...