Bit Definition and 380 Threads

How to correctly tap hole, i.e. make thread inside it, by use a usual drill with bit having 2 in 1 i.e. both bore/drill and tap bit once as in hole tap the rule is it must always go back and forth full cycle clockwise and half cycle counter-clockwise direction, so how can this rule in the former...

What I think I should do: 1 = 0001 7 = 0111 3 = 0011 First block = 00010111 Second Block = 00110000 Now, I do binary division 00010111/11010 = find the answer 00110000/11010 = find the answer This is what I think I should do, but I am not sure if this is correct. Is this basically CRC? Any...

In class we were given the example of a 32-bit architecture, so the opcode has 5 bits, register A had four bits, register B had four bits, the destination register had 4 bits and the offset was 15 bits, this was how it was done for "add" instruction. But when I was further reading about it...

I am unsure of how to approach this problem, we begin with two 8-bit full adders, is the goal to just combine them in some way so that it becomes one entire circuit while also adding NAND and NOR gates where necessary? By the end will we then have 16 1-bit full adders?

Hi PF. I desire deeper understanding of fundamental physics, and quantum mechanics can be a challenge for me (compared to other topics in physics). I read in the intro of the physics textbook chapter that QM explains many phenomena, e.g. why copper conducts electricity and glass does not. In...

This is more of a mathematics confusion rather than a computer science confusion, so please treat it like that. I understand the computer science behind it(I hope so) but my confusion lies in the basic math part that is there. I am studying about ipv4 fragmentation. This is ipv4 header. The...

I am studying about ipv4 fragmentation. This is ipv4 header. The fields of concern here are-: -> identification(16 bit) -> Flags(3 bit) -> fragment offset(13 bit) -> Total length(16 bit)...

Problem Statement: I am not quite sure how to approach this problem and would appreciate the help. I how the C/N is closely related to the SNR (Eb/N0), but the question does not give the bandwidth or data rate for me to use the formula above. From the constellation diagram, my guess is this is...

In general, if R is the recovery channel of an error channel ε, with state ρ, then and according to these lecture slides, we get the final result highlighted in red for a bit flip error channel. I am simply asking how one reaches this final result. Thank you (a full-ish derivation can be found...

During the day, I am between sun and earth. During the night, I am behind the Earth if I'm looking from the sun. So its Day: sun-me-earth night: sun-earth-me So the forces of gravity from sun and Earth add during the night, but during the day, the sun attracts me away from the earth...

Hi all, I have a project to code in 8051 series, DS80C320-ECG (data source as reference): "Division of two 16 bit unsigned integers being in the internal memory, quotient and remainder should be stored". I find a way to do it but there is a part of the program that i don't understand, I attach...

The first two parts to the question were as follows. If a vector field ##\xi## preserves the Maxwell field then ##\mathcal{L}_{\xi} F = 0## so by Cartan's magic formula ##i_{\xi} \mathrm{d}F + \mathrm{d}(i_{\xi} F) = 0##. But since ##\mathrm{d}F = 0## then ##\mathrm{d}(i_{\xi} F) = 0 \implies...

Do you consider writing a program that takes 3 integer inputs and orders them in ascending order (accounting for same numbers) difficult? You can only use if statements (if, else if, else). I know there is some thing called "sort" that does the tedious work for you but do you find this simple...

I came across a derivation of the Noether theorem with a step I don't understand; the transformation of the time and configuration space are written as$$\tau(t,\varepsilon) = t + \varepsilon \delta t, \quad Q^a(q,\varepsilon) = q^a + \varepsilon \delta q^a$$here ##\varepsilon## is an...

So I got this question while coming across, and I would like to seek some advice/tips for these types of questions. 1) Assuming I want to try and build using MUXs, I will get the truth table of both a 2 bit comparator and MUXs. In this case: For comparator: And for MUX: So from what I...

Hi. I understand that the number 20, written like this, has 1 significant figure Suppose I took a pile of measures of length: 18, 19, 20, 21, 22, 23, 24, 25 giving a mean of 172/8 = 21.5 on my calculator If I have to give the mean to the lowest number of significant figures then that would...

A few weeks ago I ordered a new 27" iMac with a 2TB SSD instead of the standard hybrid drive. Then the old Mac Pro died a few days before its replacement arrived. Broken heart, maybe? Now I've jumped ahead several versions of MacOS to 10.15 a.k.a. Catalina, and have to get new versions of all...

This weekend (June 26-28) the IEEE Information Theory Society is showing a free screening of The Bit Player - a movie about Claude Shannon (the "father" of information theory) The website below has the link and password for Vimeo...

However when there is a binary point where do I start grouping from? Is the rightmost bit considered the least significant bit even then? The other possibility is to begin grouping from the least significant bit for the integral part and then separately begin grouping from the leftmost digit...

My thought is following: However this would give me w=E_m + E_n instead of E_m-E_n I guess something relating to hermiticity or adjointing something has gnoe wrong in my version. Can someone point me in the right direction please? :) Thank you in advance!

I have a problem which consist in 1 bit RAM made of 3 MOSFETs. One of the questions is to calculate the maximum voltage that the memory element can receive. I have obtained the result by inspection (it is 4 Volts) but I'm unable to reach the same by applying the Thevenin Theorem. My...

We have a Windows 7 Professional 32-bit desktop running on an Intel core i3 processor which is 64-bit capable. No idea why 32-bit version of OS was installed. I want to upgrade it, as stated above. I will be doing this for the first time, so there are some unanswered questions. I will be using...

I'm working on an assignment for a computer science course. The professor did not give very good instruction, and I can't find very much information about the subject online. We are supposed to use this http://www.anne-gert.nl/projects/simpsim/ program to perform various operations including...

Hi All, I am setting up a WMWare15 Virtual Machine (VMWare Workstation 15 Player, more accurately). It requires the use of an OS. I have a copy of Win7 Pro which I already used successfully _except_ that it was a 32-bit version. Someone who knows more than I told me that it is possible for...

Its all in the summary.

Did physicist John Archibald Wheeler propose the existence of multiple universes through his "It from Bit" or "Participatory Universe Principle" or "Law without Law and Pregeometry"? Is the multiverse related to Wheeler's ideas? I've been told that It can produce multiple universes, obviously...

In this article: https://arxiv.org/pdf/hep-th/0211048.pdf by physicist Andrei Linde, it mentions Wheeler-DeWitt equation and he relates it to Wheeler's Participatory Universe model. Also, I found other sources that seem to establish a connection between Wheeler-DeWitt equation and Wheeler's It...

i designed a cone drill bit with right hand thread to give friction and grab inside to give pulling force. my question is can this type of cone drill bit drill hard rock formations like normal tricone drill bits with teeth or the cone drill bit will be weak to penetrate hard rock formations .

Hi all, I will try not to extend too much, but basically I have been in a horrible situation for the last months and I am starting to get a bit desperate/anxious. I submitted my PhD thesis on Theoretical Physics in December 2017, and since then, I have been unable to find a position anywhere...

Saw this video today on facebook. I wonder how soon it will be before one of these is fitted with a machine gun. What if one of these was built or stolen for use in terrorism? In a densely populated city, how long could one of these roam freely gunning people down before police or military...

Recently when I reviewed something about the composite function for my calculus exam, I remembered I had been thinking a question for quite a long time (maybe I was going into a dead end) since I was in high school. I was thinking whether f(x)=1/(1/x) and g(x)=x are the same function or not. It...

A friend knowing I have an interest in science sent me this amusing story - hope you find it as funny as me Scientists at CERN in Geneva have announced the discovery of the HEAVIEST element yet known to science. It was discovered in Australia, which is now the leading producer, but other...

I personally am undecided on the issue but it goes without saying that physicists have been stuck on the same problems for years. Sure they recently proved gravitational waves, but one could say that we knew they were they existed anyway with near certainty, if they weren' t there it would be a...

Hello! (Wave) It is stated in my notes that the calculation of $a^{n-1} \pmod{n}$ by fast exponentiation takes $O(\log{n})$ arithmetic operations and $O((\log{n})^3)$ bit operations.By using fast exponentiation, in order to calculate $a^{n-1} \pmod{n}$ we write $n-1$ as $n-1=n_0+2 n_1+ \dots+...

Hi All, Just curious on pros/cons of installing software designed for 32- bit systems in a 64-bit machine (Windows 8.1*)? * I have never been able to tell the difference, if any, between Win 8 and Win 8.1 .

Homework Statement [/B] I am currently working on an assignment in which I create a six-state up/down counter. The purpose is to understand the functionality of flip-flops within a circuit among other things. There are 3 input bits (Q2,Q1, Q0), and a 4th control bit (C) which determines the...

Why is the quantity "information" missing from the SI system? Also, if they did add it, do you think it would be added as a base unit or dimensionless derived unit?

< Mentor Note -- thread moved to HH from the technical forums, so no Homework Help Template is shown >[/color] please can somebody help me, how to calculate this 4 bit dac, i know this one if input 1.1.1.1 5/2, 5/4 5/8 5/16 voltage i don't understand nothing i search on the internet but i...

I was a bit confused about the work energy theorem. I perfectly understood it's applications for point sized particles but I'm a bit confused about its application on extended bodies both rigid and non rigid. Case 1 {for rigid bodies} :- Consider a rod of definite mass hinged at the top. It's...

Homework Statement Homework EquationsThe Attempt at a Solution The answer is different though,

I am trying to find or develop an algorithm that can take a 1024 (lets assume random) bit array (so 128 bytes) and, by adding some redundancy (making the final code more than 1024 bits long), make it capable of decoding the data with up to n random bits flipped. Important point is that it has...

So a 3 bit 2 input multiplier has a maximum of 6 bits and the max integer product is 49. Problem is I have no idea displaying it in 2 seven segment displays since the 74LS48 decoder only has 4 inputs and 7 output, only good for a single 7 seg. And we are required only to use ICs which is rather...

Homework Statement We are asked to make a subtractor circuit which has a 2 bit, 2 input data. Homework Equations A1A0 _ B1B0 _________________________________The Attempt at a Solution I would have a 3 bit output with one borrow. The problem is I am stuck at this point and am having...

I'm trying to build a system that receives coefficients and performs a Fourier approximation, I need to write the system in VHDL so I'm using tables to simulate sin functions, they output an 8 bit number which is the sin of the input, then I need to multiply each sin with it's given coefficient...

In information theory, one bit is typically defined as the uncertainty of a binary random variable that is 0 or 1 with equal probability,[4] or the information that is gained when the value of such a variable becomes known.[5] https://en.wikipedia.org/wiki/Bit That sounds a lot like...

I'm trying to build a heat treating oven/kiln and I'm having a difficult time identifying equations to assist in sizing and insulation. I have info on sizing a heating element based on available power and I have and equation to quantify heat transfer through the walls and insulation but I'm...

anorlunda submitted a new PF Insights post Why Study Physics? A Bit Goes a Long Way! Continue reading the Original PF Insights Post.

http://www.iflscience.com/space/the-edge-of-the-universe-is-closer-than-scientists-previously-thought/ Hey, guys! I'm new in this forum and I found this interesting article. Damian

Hi all, Silly question perhaps: I had understood that the energy density of the vacuum is constant throughout spacetime. But, with the Casimir effect, for example, the geometry of (real) matter (i.e., parallel plates), changes the vacuum energy density in between the plates - is this correct...

I got a freeware encryption software with only 128 bit. How fast it is for hackers to crack 128 bit file encryption?