What is Network: Definition and 462 Discussions

Network (stylized NETWORK) is a national Catholic social justice lobby headquartered in Washington, D.C. The organization focuses its lobbying efforts in the areas of economic justice, immigration reform, healthcare, peace making and ecology. Sister Simone Campbell is the executive director of NETWORK.

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  1. D

    Programs Diploma thesis - Neural Network Application in Physical Problems

    Hello everybody. I am currently on my last year of Computational Physics education. More and more I am interested in Machine Learning and Neural Network. Time has come for me to choose diploma work thesis, so I am searching for interesting ideas where I can merge my interest in neural networks...
  2. Jason-Li

    How Do You Calculate Insertion Loss in a T-Network?

    Homework Statement Calculate the insertion loss of the T-network given the values: Rs = 75Ω Rl = 100Ω Ra = 13Ω Rb = 13Ω Rc = 213Ω The transmission matrix and Network are below: 2. Homework Equations The Attempt at a Solution Constructing the matrix: A = 1+Ra/Rc = 1+13/213 = 1.061 B...
  3. Q

    Network analyzer vs Spectrum analyzer

    I'm currently studying the network analyzer(NA) and spectrum analyzer(SA), and one thing makes me wonder; Would it be possible to 'mimick' a NA with a SA and a signal generator(SG)? Ofcourse some phase calculations may also be required, but from my naive understanding, if a NA sends various...
  4. HumanistEngineer

    Hydraulic Modeling of Central Heating Network

    In this task of mine, I need to develop a tool/software to carry out (dynamic) hydraulic analysis of a central heating network, formed with supply and return pipes so forming a multi-parallel loops in a closed circuit, as can be seen in the below picture. Can anyone suggest me some references...
  5. nsaspook

    The Feds Cracked El Chapo's Encrypted Comms Network By Flipping an Informant

    I would not want to be that guy now that it's public he ratted out El Chapo. I hope he likes that remote cabin in Montana or whatever with that new identity. https://gizmodo.com/the-feds-cracked-el-chapos-encrypted-communications-net-1831595734 I'm sure none of the 1500 drug lords and cartel...
  6. cnh1995

    Electrical Network Problem: Power Transfer

    Homework Statement Homework Equations P=V2/R For maximum power transfer, Rload=RThevenin The Attempt at a Solution I know the efficiency is 50% during maximum power transfer. So when all the sources are acting simultaneously and ( at the same time) R=Rth, maximum power will be dissipated in...
  7. T

    I What is a Single Component Network?

    What does it mean if a simple network consists of n nodes in a single component? More specifically, what is does it mean to be in a single component?
  8. Auto-Didact

    Lingusitics How Have Dynamical Systems Approaches Influenced Contemporary Linguistics?

    A few years ago I read two pretty groundbreaking linguistic papers from the 90s arguing that natural languages are networks which can be conceptualized from the perspective of nonlinear dynamical systems theory, with a lexicon being a state space and grammatical rules being attractors in that...
  9. D

    Network Remote Connector & Pinger

    I have an alarm system in separate building. When the smoke detector detects smoke or fire.. the mother unit will ring my cell and text me... I need a device where it constantly sends ping to the remote location and the remote location pings my device every 15 seconds.. this is to ensure there...
  10. M

    MHB Convexivity issues in a new type of network - NLP

    Hallo All! Im glad to be here... I have written a paper on a new type of network for NLP but i have lingering questions on how efficient and effective it is...this is a link to it on my blog... ABSTRACT submited So the following is a more formal framing of efficiency and effectiveness in...
  11. .Scott

    Dimensionality of Network Topologies

    A poster (@Mr_Phil_Osophy ) encountered an article on the network topology of the brain: Unfortunately, he confused the dimensionality of neuron interconnections with physical dimensionality - and posted it in the Physics->"Beyond the Standard Model thread". Apparently, his misguided...
  12. A

    Engineering Combination Circuit Diagram (resistor network simplification)

    How do I accomplish this? The goal is to redraw the diagram of the ciruit shown below, until it becomes series in the end. Given: Here’s what I did: Diagram 1 2 3 4* 5 *I apologize for flipped images. iPhone camera is tricky. Is this correct? If not, why?
  13. E

    Engineering Basic circuit problem -- Resistor network and a voltage source

    Homework Statement http://www.chegg.com/homework-help/questions-and-answers/problem-2-variableh-resistor-r-circuit-fig-p224-adjusted-va-equals-60-v-find-value-r-q8083343 Homework EquationsThe Attempt at a Solution Hi, I attached a pdf file with the problem. My question is, for the lower right...
  14. J

    Transient Response of Electrical Network

    Homework Statement Homework Equations In Capacitance current leads voltage In Inductance current lags voltage For oscillations R = 0 3. The Attempt at a Solution Since current is leading voltage in above question, impedance is capacitive. Book answer is D for both. How? And for 3rd...
  15. BWV

    Has anyone tried to train a neural network to learn physics?

    Have been curious about a thought experiment where, given enough experimental data to train, a sophisticated enough neural network / deep learning program could 'discover' most of classical and quantum physics. Any thoughts?
  16. T

    Pressure Drop in a fire fighting network with loops

    Hello Everyone, Can someone please explain to me how I would go about verifying the External Static Pressure of a pump that feeds a pressurized fire fighting network with loops in it. An image of the network is attached. I'm not being able to grasp the concept of pressure drop in a pressurized...
  17. T

    Pump ESP for infrastructure water network with loop

    Hello Everyone, I've been tasked with verifying the pump external static pressure for an infrastructure water supply network. The network is a series of loops as shown in the image attached . According to the calculation notes done by the designer, the design of the network was done in watercad...
  18. ChrisVer

    Python Neural Network training BUT testing fails

    Hi, I was trying to work on a basic NN training problem I found online. The pattern of data to train are the triplets: [101]->1 , [011]->1, [001]->0 , [111]->0 , [100]->1 Meaning that the 3rd number brings no info, while for the first 2 if they are identical it should evaluate to 0 else to 1...
  19. G

    Capacitor Network Homework: Find the Charge

    Homework Statement https://imgur.com/i5jylxC Homework Equations I have to find the charge in each capacitor The Attempt at a Solution I don't know how can i start, can i use kirchhoff rule in each loop, using q/C when i go through a capacitor?
  20. C

    How much would a quantum computing network rely on power?

    Let's say an entire city runs on a network run by quantum computing. Fail safe locks are run by this network. Would triggering a massive unlocking of the city be a simple matter of killing the main power to shut down the quantum network (by shutting down the cooling systems)? It seems logical...
  21. denihilo13

    Road Segment vs Road Network

    I'm having a problem with my undergraduate research. My professor wants me to justify why studying a road segment in getting traffic characteristics is better than studying a road network. My objective is to test the effectiveness of a forecasting model in predicting traffic flow. I really...
  22. ADDA

    Can an ANN Use a SR-Latch to Store Fuzzy Floating Point Variables?

    I'm attempting to use a artificial neural network to store a fuzzy floating point variable. While writing the code, I became somewhat creative. I used the idea of an Set Reset Latch and statistically translated the hardware SR-latch into an artificial neural network. My mathematical goal is to...
  23. S

    Potential difference across capacitor in a network

    Homework Statement Determine the potential difference across the plates of the capacitor of the network shown in the figure. Homework Equations kirchoff's loop rule q=vc 3. The attempt at a solutio applying kirchhoffs law starting at bottom right point, q/c2-E1+q/c1+E2=0 =>E2-E1=-q/c1-q/c2...
  24. Auto-Didact

    A Algebraic topology applied to Neuroscience

    Eugene Wigner once famously talked about the "unreasonable effectiveness of mathematics" in describing the natural world. Today again we are seeing this in action in particular with regard to the description of the biological brain from the perspective of neuroscience. Researchers from the Blue...
  25. B

    RF Network for 2-Way Communication, Security, 3.5x1.5mi Community

    I need a RF network that has this : 1) two way communication. 2) Security 3) can work in a 3.5 x 1.5 mile community : with houses, trees, buildings and a park ( https://en.wikipedia.org/wiki/Box_Hill_North,_Victoria). 4) have about 1000 endpoints. 5) low power and low cost would Xbee be...
  26. martin25p2

    Calculating the total capacitance of a network of capacitors

    Homework Statement I would like to know how to calculate the total capacity of the capacity network displayed in the uploaded picture. I know how to calculate the total capacity if the capacity are in parallel or in series, but I am confused by the capacity Nr 6. I know how to calculate the...
  27. Imager

    Network Cabling Testing (for home)

    I’m having some remodel work done on a couple rooms in my house. They will be adding a new CAT7 run and replacing the old coax (at least 20 years old). Is there any sort of “hack” I can do to test the speed of the new cables? The only thing I can think of is just moving my laptop around...
  28. G

    Other How can I finance my son's MS in network security in Canada?

    Hi friends! My son is an Electronics and communication degree holder from India .He is keen to join MS in network security in Canada. One of our concern is Financial.Please guide . Thanks!
  29. W

    Basic Question about Users in a System (like the PF for example)

    Hi just curious, What is the computing/networking model for a site with many users, say, as PF? Is it to grant access to each user to a shared drive? Sorry if this is too simple. I mean, I understand that first I login and I have to be first authenticated, then authorized to access certain...
  30. Cocoleia

    Asymptotic magnitude Bode plot for a network function

    Homework Statement I am working on the following problem: The Attempt at a Solution I have the solutions, I just don't understand: I know that the pole should be the root of the denominator? but in all the examples I was given they used s and not jw, so what is the variable in the network...
  31. F

    Plasma Impedance Matching Network

    Dear all, is there anyone with plasma background? I am developing an algorithm for a plasma impedance L type matching network. Initially, I set the Load and Tune units to some specific positions. The algorithm is simply tuning a possible minimum SWR starting from the initial position...
  32. Cocoleia

    Network function for an opamp circuit

    Homework Statement Homework EquationsThe Attempt at a Solution I'm really unsure of what to do. I feel like Vs should not be equal to Vo. I am not sure if I have the right idea with the equations that I have written. I am confused because I don't know the value for omega. Can someone help...
  33. V

    How should I represent a financial market as a graph?

    Hi guys. I am reading several papers about financial market and authors show the possibility to represent this market as a graph in which nodes correspond to traders and edges represent trading relationships. Which programming software could be a powerful tool to write a such code? I am...
  34. A

    Calculating the heat released in one part of an electrical network?

    Homework Statement An alternating current, with the current value of i = 3*cos314*t, is split into two parts in point A (each part with its own thermal resistance, R1 = 60Ω and R2 = 40Ω), which then connect again in point B. What is the released heat in the part between point A and point B...
  35. ABHISHEK SINGHAL

    I want to know about Computer Network Engineering certification programs

    i want to do the certification programme in ccna & ccnp for network engineering. is it good for me to do?
  36. D

    How Do You Calculate Insertion Loss in a T Network?

    Homework Statement [/B] I am trying to follow a given example as part of my notes. The example is described below Using the equation below calculate the insertion loss of the T network of figure 20 (figure 20 is in the attachment) given the values in the table. I am given a transmission...
  37. brainbaby

    Calculation of inductances for a coupling network

    Hi guys As per text... To match 10k with 500Ω a coil is used as an autotransformer tapped at point 3...now for a certain bandwidth and centre frequency what should be the value of Lp and Ls...?? How do I calculate it..?? and if the value of Ls and Lp is found out to be low then how could they...
  38. N

    Bernoulli's law in a network of a tube and a reservoir

    Homework Statement I am looking at the following system: It shows a pore/tube (B) which is attached to a reservoir A. The fluid in reservoir A has a non-zero velocity in the horizontal direction, but I assume that the tube B is so long that the velocity there is unaffected and still zero...
  39. E

    Can CNNs Be Tuned to Enhance Specific Texture Parameters in Image Simulation?

    Hi I am using a convolution neural network (with inversion) to simulate images with the same "texture" as the input image, using a random image to start with. The activations of the CNN are first learned with an example or source image. A cost function then minimizes the difference between the...
  40. B

    Thevenin reduction of network for fault analysis trouble.

    Homework Statement Reduction from top network to bottom network in the screen shot. I can not find the steps that have been taken to do this. Fault impedance = Zfa = Zfb = Zfc = j0.5 Homework EquationsThe Attempt at a Solution in hand written screenshot, sorry for the mess, just to show it...
  41. N

    Network Flow - Bipartite Matching

    Homework Statement You've periodically helped the medical consulting firm Doctors Without Weekends on various hospital scheduling issues, and they've just come to you with a new problem. For each of the next n days, the hospital has determined the number of doctors they want on hand; thus, on...
  42. ExplosiveMercury

    C/C++ How to Create a Hosted Network Program in C++?

    Hi, I've been recently started programming, and wanted to make program I can use in everyday life. I use CMD hosted network every day on my other PC, and wanted to make program in witch I can stop/start/restart hosted network. This is current progress: #include <iostream> int main () {...
  43. R

    Electrical distribution network

    I am doing a project for a course and it asks me to draw annotated drawings of the distribution network including generators, transmission systems, distribution system and low voltage loads which in general is all fine. However, I have come across a question that asks me to draw an annotated...
  44. A

    Energy stored in Capacitor Network

    Homework Statement A potential difference Vab = 46.0 V is applied across the capacitor network of the following figure. If C1=C2=4.00μF and C4=8.00μF, what must the capacitance C3 be if the network is to store 2.80×10−3 J of electrical energy? Homework Equations U=(1/2)CV^2 (1/C) = (1/c1) +...
  45. T

    Design choices for running an Electric train (and network)?

    Hi, I'm going to pose my questions with a number of assumptions, so please pick me up on any that are wrong. I want to know the design choices behind electric trains historically and current, this will mostly require some context of induction motors and inverters. I don't know exactly how EMUs...
  46. moenste

    Resistance of a network between two points

    Homework Statement Calculate the resistance of the network shown below: (a) between A and B, (b) between A and C. Answers: (a) 3 Ω, (b) 4 Ω 2. The attempt at a solution (a) I would say that the resistance is 4 Ω between A and B. (b) For A and C the resistance is: (1/4 + 1/4)-1 = 2 Ω. In...
  47. T

    What is the difference between 3G, 4G, and LTE cellular network standards?

    I am very confused with the 3G, 4G, LTE, UTMS, WCDMA terms... Hope someone could shed some light on it. I think complication arises when marketing people start to use these terms interchangeably? Below is my interpretation, is that correct? Would someone be kind enough to make some comments...
  48. Martin V.

    Pressure in district heating network

    Homework Statement Can somebody explain the figure attached? Homework Equations H=p/(rho*g)+(v^2/2g)+z The Attempt at a Solution Search on the internet and looking in fluid mechanics book. Not possible to get book to get a explanation.
  49. F

    Network Pipe Flow: Understanding Assumptions and Calculating Junction Position

    Homework Statement from the diagram , we know that the junction is lower than the pipe at B . why the author want to make an assumption that the junction is located at 20m from the datum ? is it correct to do so ? Homework EquationsThe Attempt at a Solution eventually , i found the ans is...
  50. F

    Solving the Network of Pipes: Two Possible Answers?

    Homework Statement in this network of pipe , the author make the attempts to solve it using ( Q1 = Q2 + Q3) , so delta Q = Q1 -(Q2 +Q3) , the value of head of junction that he gt is 25.2 , with delta Q = (3x10^-3) ( not shown in the working) Homework EquationsThe Attempt at a Solution however...
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