module Definition and 156 Threads

Hi I am Ken. Nice to meet you. I would like to get some info on this synchronizing module. It has a 3 phase lamp for synchronizing an alternator. Any knows what's the theory behind that flashing lamp? what if the lamp blink very fast or blinking slow? the reason is frequency is out of phase but...

Letting $X$ be a ring and $K$ be an $X$-module, I need to show that **if** $K \cong A \times B$ for some $X$-modules $A,B$, **then** $\exists$ submodules $M'$ and $N'$ of $K$ such that: $K=M' \oplus N'$ $M' \cong A$ $N' \cong B.$----------I understand the concepts of internal and external...

Actually out of my personal interest to learn & upgrade my skills I have self volunteered self development of Photonics Simulation software on Python platform. I am basically a software developer. As such I seek some technical information for same related to its development activity. Can you...

Homework Statement For my 8th grade honors science class we are currently doing astronomy. We got assigned a project where we have to create a landing module like the module that people land back on Earth in. The catch is that it has to be able to fit in a 10cm x10cm x10cm box and be able to...

I am reading Paul E. Bland's book, "Rings and Their Modules". I am trying to understand Chapter 4, Section 4.2 on Noetherian and Artinian modules and need help with the definition of a noetherian module - in particular I need help with the nature of an ascending chain of submodule ...

Question: An 8K x 8 memory module consists of 2K x 8 of ROM which starts from address 1000H and 6K x 8 of RAM which starts from address 2000H. The module is to be realized using 2K x 8 RAM devices and 2K x 8 ROM devices. The RAM devices have active low write enable (WE) and active low chip...

The chartplotter on my boat works fine. But the buttons work via a sealed keypad module. The contacts use (I think) a. Conductive grease. It works fine when the temperatures are 70F (20C) or higher, but not fine when it is colder. I'm fond of that device. I would rather modify it than...

I am trying to prove the following:Let $R$ be a commutative ring and $M$ be a free $R$-module having a finite basis of $n$ elements. Let $T:M\to M$ be a surjective $R$-module homomorphism. Then $T$ is injective.Let $I$ be a maximal ideal of $R$. Note that $I$ annihilates $\widehat M:=M/IM$ and...

I am reading An Introduction to Rings and Modules With K-Theory in View by A.J. Berrick and M.E. Keating (B&K). In Chapter2: Direct Sums and Short Exact Sequences in Section 2.1.16 B&K deal with the standard free right R-module on a set X. I need some help with the meaning of B&K's terminology...

I am reading "Introduction to Ring Theory" by P. M. Cohn (Springer Undergraduate Mathematics Series) In Chapter 1: Basics we find Corollary 1.16 on module homomorphisms and quotient modules. I need help with some aspects of the proof. Corollary 1.16 reads as follows: In the above text...

For those looking for an undergraduate introduction to module theory there is not a great deal of choice regarding textbooks, but two possible texts are as follows: "A First Course in Module Theory" by M.E. Keating of Imperial College, London [Publisher: Imperial College Press, 1998] and...

Hello, I want to create one file test.f95 where i can keep all my subroutines and use them whenever i create a new program new.f95. Is the modules the right way to do it?? because when i create a file let's say test.f95 with the module and one other with my main program (new.f95) when i...

Homework Statement If a I san integer, show that a^2~0 or a^2~1 in mod 4 (~ represent equivalence) Homework Equations The Attempt at a Solution my ATTEMPT: I started with the division algorithm.. a = 2q + 1 for all odd numbers a = 2q + 0 for all even numbers then I squared the...

Homework Statement ≈ → equivalence "In general, if a is an integer, the division algorithm gives a = qn + r, where 0 ≤ r ≤ n-1 so a≈r (mod n). Thus every residue class module n appears in the list [0], [1]...,[n-1]. In fact, it appears exactly once. I'm having trouble connecting the dots...

I am reading Dummit and Foote Chapter 10: Introduction to Module Theory. I am having difficulty seeing exactly why a conclusion to Proposition 27 that D&F claim is "immediate": I hope someone can help. Proposition 27 and its proof read as follows: In the first line of the proof...

I am reading Dummit and Foote Chapter 10: Introduction to Module Theory. I am having difficulty seeing exactly why a conclusion to Proposition 27 that D&F claim is "immediate": I hope someone can help. Proposition 27 and its proof read as follows...

Hi I want to use the SD Card Module Slot Socket Reader Module (Link attached) as a micro sd card reader DIRECTLY to my PC. Is it possible to connect to this Module a USB Male connector and use it as a normal sd-card reader? The Module...

Hello, I have to make a Display module in verilog and first time i want to create a ball which is moving and i have a question, the vertial/horizontal synchronization module is done, the question is about displaying the image using RGB. So, i use 640x480 display and 25Mhz clock frequency and...

Hi i am simulating Heat transfer through bimetal that is builded by SiO2 on one side and Aluminium on other side. But when i apply heat source on one side(Aluminium side)the heat do not get transferred to the other side(SiO2 side) through the interface. Only Aluminium side is showing temperature...

We define basis as: Let M be a module over a ring R with unity and let S be a subset of M. Then S is called a basis of M if 1. M is generated by S 2. S is linearly independent set. Also we define free module as An R module M is called a free module if there exists a subset S of M s.t.S...

http://m.ebay.com/itm/271230081889?cmd=VIDESC&gxo=true How can I set this module up to have just a single video output so it can work with rca?

I am working on a project. I have completed designing PV module in simulink. I have also added MPPT algorithm and Boost Converter. Now I want to connect it with a grid. Can anybody tell me the circuit diagram?

I am trying to make a coil suppressor to restrict any voltage above say 130v. It is a simple VDR RC circuit. I am using a resistance of 47ohm, 250v and a capacitor of .1nF 250v a VDR of 130v. But the circuit is not working as expected. Is it because of the voltage spec of resistance and...

Hi, I have an basic kinematics problem I can't seem to grasp -- hopefully someone can shed some light on it for me? The acceleration, a, of an object is equal to a=s, where s is the distance from the start position. Sketch a graph representing velocity against distance, s, for the...

Hi, Let $A$ be a commutative ring, $M$ an $A-$module and $U,V,V'$ submodules of $M$ such that $U \cap V = U \cap V'$ and $U+V=U+V'$. Does it follow that $V=V'$? The answer is no because the condition that $V \subset V'$ is necessary though I can't find a counterexample. Does someone has a...

Hi, I want to use a module to repeatedly calculate a parameter in NDSolve, but I seem to be having trouble. Here is a simplified version of what I'm doing. In this example, I want to use the difference between v1 and v2 at a given timepoint to calculate the connection between v1 and v2 for...

Hi all, I am working on a Fortran 90 program that has many subroutines within the same module. The question is "are all the variables of a called subroutine are available to the calling subroutine without declaring them in the argument list of the called surboutine"? even though they are...

As you know, SFP plus transceiver, based on the latest technology, is ideally suited for datacom and storage area network applications. But there are so many SFP plus products, like BIDI SFP plus transceiver. What is BIDI SFP plus module? What is it Exactly used for?

USB GSM Module with SDK? I was wondering if anyone knows of a USB GSM Module that comes with some sort of development kit. I would like to develop an application (Probably in C#) and be able to send out SMS/Text messages as alerts to certain events. Most of the GSM Modules I've seen are for...

The situation is messy so I'll avoid details. I absolutely must do one module this February that is listed as 'level 3' at the Open University without formally taking the prerequisites. I have to teach myself the required mathematics, in two months, to give myself a decent chance of passing. If...

Hello All, I'm designing a test setup that requires the use of a 50A 50mV current shunt to take measurements for a circuit which produces pulsed DC currents up to about 100 kHz or so (highest frequency component anyway). I would like to use this shunt here, but also amplify the signal 10x or...

Homework Statement I am curious if all modules contain 0. Homework Equations A left R-module M over the ring R consists of an abelian group (M, +) and an operation R × M → M such that certain properties hold... The Attempt at a Solution The definition of a module says that it is an...

Hi all, I've got 2 bevel gears that I'm recreating in CAD, I've got the shapes down it's just a little bit of fine tuning with the dimensions, for which I need the module/diametral pitch of the gears. The pinion has 9 teeth and a tip diameter of roughly 39.3mm, and the gear has 14 teeth and a...

First,could you please clear this doubt- A polynomial with rational coefficients does not form a vector space over the real numbers.So,will this set of polynomials be called a module instead of a vector space? Is my understanding correct?Any thing else I should know about modules? Thanks

I am working on trying to get a .bin file from a flash memory module. Am29BL802C I have attached a picture of the chip I am working with, the datasheet, and the pinout of said chip here --> http://forums.hackaday.com/viewtopic.ph ... 994#p10994 I need this file in order to reverse engineer...

Homework Statement Let R be a unital commutative ring. Let M be an R-module and \varphi : M \rightarrow M a homomorphism. To show: if \varphi \circ \varphi = \varphi then M=ker(\varphi)\oplus im(\varphi) The Attempt at a Solution I have already shown that M=ker(\varphi)\cap im(\varphi)...

Homework Statement Let E be an n-dimensional vector space over a field k. Then if R is the ring of diagonal n-by-n matrices over k, E can be considered as a module over R, with the scalar multiplication diag(λ_1,...,λ_n)(a_1*e_1+...+a_n*e_n)=λ_1*a_1*e_1+...+λ_n*a_n*e_n, where e_1..._e_n form...

http://i111.photobucket.com/albums/n149/camarolt4z28/untitled.jpg G/N is the set of all left cosets of N in G. I don't understand the notation. a) The permutations are (1,2), (2,3), (3,1). What are the left cosets - <1>, <2>, <3>? That doesn't make sense with permutations. b) I have...

Just wondering if its possible to reconfugurate an LSAM/Altair accent module to be able to withstand re-entry to earth? What would be used for heat shield upon re-entry?

I am writing some code which involves numerical integration of a function on a 3D grid of points. I am defining the type vector to refer to these points, and I am also trying to extend the intrinsic operator * to include scalar and vector multiplication. However, I cannot compile and I don't...

Let R be a finite dimensional C-algebra (C=Complex numbers) and S a simple R-module. Why does it follow that End_{R}(S) is also finite dimensional (as C-vector spaces, I'm guessing)? I'm not really sure how to construct a basis for it using one of S, and there's probably another reason for it...

Referring to figure Q5, which shows triplemodule redundancy, assume that each module is configured to calculate the same function y=f(x) on 16bit input word x. Without knowing what is the value of x, and without knowing the exact function f() that each module implements, determine the most...

I need to know because i need a chip that is a conductor and absorbs heat then converts it to electricity.

Hi! I am writing a simple code to get familiar with creating Fortran module. The program consist of a main.f and a module.mod file. When I type in: gfortran main.f I get the following error: Fatal Error: File 'module.mod' opened at (1) is not a GFORTRAN module file I think I found the...

Hi all, I have the following code which runs without error but gives no output. It's probably simple but I just can't see the problem. [FONT="Times New Roman"]LM={}; M[line_, cur_, lq_, ld_, k_] := For [i = 1, Length[line[[1]]], i++, Module[{m}, If[line[[1, i]] == "Q", m =...

I have a bunch of programs that initialize values of variables of a user defined type, so I thought I'd initialize them all in a module and have each program 'use' the module. But, it seems the only way to initialize the variables in a module is to put the initializations in a subroutine within...

I'm using comsol 4 for plasma modeling but I've read that this module is just for low temperature plasma, does anybody knows the temperature limitation of the plasma in this module? I mean how much is the upper limitation of plasma temperature?

Maximum "jerk" for experimental module 1. A landing module has a mass M with three springs each of stiffness k that hover over the surface (height not given). If the final touchdown velocity is to be Vtd, what is the maximum jerk (time rate change of acceleration) the module experiences given...

Dear all, Iam running a code which has only 2 main variables, i.e. m and n using Module. I have tried to run the code as attached but it is not working. Please help me to improve the code so that I would be able to get qmatrix[m,n]. Perhaps, is there any other better method to use or...

How does one prove that for R commutative, a free finitely generated R-module has finite rank? If R is a field (i.e. in the case of vector space), then we can argue that given a finite generating set S={s1,...,sn}, if S is not linearly independent, then, WLOG, it is that (*)...