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. S

    News 3D network diagram representing distribution of entire U.S. stock market

    Hello, I read an article about a year or two ago and I cannot remember in what magazine I read it, so I was hoping to generate some leads by reaching out. I want to find it because my professor wants to see it as well. The article was about a team or group of physicists, at a certain...
  2. H

    Simple ECE First Order Network

    Homework Statement I need to resolve this network and find the equation for voltage at some time, t'>0. I know how to find the equation, but I'm having trouble finding the value for tau because I'm not sure what the equivalent resistance is. Homework Equations tau = R*C R1 = 4 k...
  3. E

    Is 'The Social Network' a Reflection of Our Narcissistic Society?

    Despite my reluctance my friend insisted i watch and as as expected i left the theater feeling a slightly less whole person. This movie is not only represents what's wrong with our own narcissistic society but reminded me how dull my own life life was. It's fun watching movies about rich people...
  4. F

    Easy network analysis question about a problem.

    Homework Statement Thanks for looking/responding! Using node voltage analysis in the circuit, find the current i through the voltage source The Attempt at a Solution How do I know what direction the all the currents are going before I start analyzing each node? I know 2A is going counter...
  5. J

    Control Systems II: Design a Phase-Lag Network

    Homework Statement A unity feedback system of the form: X(s)-------->Gc(s)---------->G(s)------------>Y(s) | | | | ----<------------1---------<---- has a plant: G(s) =...
  6. turbo

    IFC Network Free Trial - Watch Jay and Silent Bob Now!

    The Dish network is offering a free trial of the IFC Network. Right now, I'm watching Jay and Silent Bob Strike Back, and it's hilarious. At 10:00 the Onion premieres.
  7. N

    Average distance for network topologies.

    Homework Statement I want to derive a general formula to calculate the average distance of the nodes in a network topology. The topologies can be line(linear), ring, mesh etc. The different nodes are numbered 0,1,2.. N-1. I understand the diameter of the network etc. Homework Equations...
  8. T

    How Does the Determinant of a Covariance Matrix Relate to System Entropy?

    Hi, I'm working on a project of calculating the complexity of a system which is represented by a matrix which shows the connective between each element. Normally this matrix is symmetry and the diagonal elements are 0. From the past paper, it's ln((2*pi*exp(n))*det(COV(X))) where X is the...
  9. D

    Medical Storing information in a network of cells (Brain)

    Hello all, this is my first post here. I know these things have been discussed before in this forum, but that was several years ago, and I have some questions that weren't asked. Basically, I need to know how information is stored in the brain, presumably as memories. What I already know is...
  10. A

    Understanding Pressure Drop in Parallel Piping Systems

    I have a question about network flow pressure drop. In a piping system with several identical components in parallel, is the pressure drop across the supply and return header equal to the pressure drop across one of the components? Or is it the inverse of the sum of the inverses? To use...
  11. N

    Network function. 6th degree polynomial to complex numbers

    Homework Statement the problem that i attached bellow is related to how you can obtain a transfer function from its squared magnituded. my question is not on the problem it self as its just a solved example from my book. what i find difficult to understand as you can see from my...
  12. H

    Determine Vo for the following network.

    Homework Statement Determine Vo for the following network [PLAIN]http://img535.imageshack.us/img535/7041/63014601.jpg. Homework Equations Too many to list I would think. I'm pretty sure I have to use KVL. The Attempt at a Solution My classmate told me the answer was 2.45V. I...
  13. D

    Capacitive network and resonance

    I am designing a loop antenna with a switchable resonance point from 500Hz to 99500Hz in increments of 1000. I am trying to switch resonance by changing the value of the capacitor by making a network of caps in parallel that are turned on with a mosfet. My problem is that the resonant frequency...
  14. B

    Thevenin equivalent of a network

    Homework Statement The question is to find the Thevenin equivalent of the network across the terminals a,b. The circuit is as follows:-- The solution is Zth = 12.166 angle(136.3*)ohm and Vth = 7.35 angle(72.9*) I can find out the Vth, that's easy. But I can get the Zth right coz there...
  15. S

    How to measure electric field with a network analyzer?

    Hello, This is my problem: I have a network analyzer, that is capable of measuring the S-parameters of a 2 ports network. Let's say that I connect antenna #1 (a standard half-wavelength dipole) to port #1 of the NA, and antenna #2 (same type of dipole) to port #2 of the network analyzer...
  16. B

    Final year project on mobile cellular network

    Hi, Am new on this forum.I am about to start my final year in electronics and telecommunication and i am planning for my final year project a research on how traffic (signaling) in a specific cell in a cellular network can be sent to another cell when there is a huge congestion like in a...
  17. P

    Exploring Complex Network Physics: Promises for Systems Biology and Beyond

    Haven't really seen much discussion about this field, but it seems interesting. It appears to have some promise in systems biology, but what about in other fields? What kind of material will arise from this field? Is thermoeconomics mostly pseudoscience, or just undeveloped?
  18. K

    Chemistry Determining Intermolecular Forces - Ionic Crystals and Network Solids?

    Homework Statement This is the worksheet: http://webcache.googleusercontent.com/search?q=cache:9jyqtuswY1AJ:www.chemmybear.com/groves/apch13_imfans.doc+ap+chem+pasadena+imf%27s&cd=1&hl=en&ct=clnk&gl=us&client=firefox-a Homework Equations None, as far as I know The Attempt at a...
  19. N

    Playing with Small Natural Numbers Network

    Since my late interests have been related to networks, I've started a pet project focusing on natural numbers network. I wanted to share my early explorations with this community since you have the proper background to interpret the results. I chose this network exactly because compared to...
  20. L

    Poker and the shared pot at the table in a decentralised network

    Hey, When we play Poker online, we are using a centralised network. You deposit your cash online, sit down at a game and play. You place your trust in the site to be secure; no other players can see your hands and no money is being secretly stolen from you. Even big name sites have been known...
  21. J

    Which Social Network Do Scientists Prefer for Networking?

    I know there are many and I know their approximate member count, but in your opinion, is there any 'preferred' social network which scientists (preferrably physicists) tend to use more? thanks
  22. S

    Trying to calculate normal modes of nearly infinite network LC circuits

    Homework Statement The first circuit has a capacitor with capacitance c and an inductor with inductance L. In series with this is another capacitor which is connected to the next loop in the circuit. It look something like http://imgur.com/YJDaD.png" Sorry for the crude drawing...
  23. A

    Solve Battery & Capacitors Network: Find C2,C3 PD & Q3 Charge

    I have a circuit consisting of a battery and several capacitors, some quantities are known and some are not. The capacitors were completely uncharged before the battery was attached and we are considering the static situation. (Be sure to keep at least 3 sig. figs. in your answer for all parts...
  24. C

    What are the best methods for detecting network anomalies in large data sets?

    I wanted to get some insight about which direction I should look in about Network Detection anomalies. I have been doing some research and I have found CLAD (Clustering and Anomaly Detection) which is an algorithm, however, I'm trying to find something simpler to understand to implement...
  25. N

    How Do You Calculate Q3 in a Complex Capacitor Network?

    Capacitor Network (Please help!) Homework Statement In the circuit below, consisting of a battery and several capacitors, some quantities are known and some are not. The capacitors were completely uncharged before the battery was attached and we are considering the static situation. Circuit...
  26. M

    Intermittent Home Network DNS Issues (I think)

    OK, I posted here a while back with issues home networking, specifically between varying operating systems (Ubuntu 10.04, Windows XP, Windows Vista, and Windows 7...sigh). Either way, suddenly the other day, I was on my desktop and noticed that I could find my girlfriends Windows XP machine...
  27. MTd2

    How fields control the capacity of the spin network channels?

    . How a field request capacity of a channel?
  28. R

    Understanding ISP Network Connections for Small ISPs

    I'm trying to understand how ISPs agree to connect to each other by considering a hypothetical situation: Suppose I wanted to start my own ISP in a small town. Would I have to pay to connect to another network that is already connected to the internet (hence that would make me connected to the...
  29. jegues

    Network Current/Voltage Relationship

    Homework Statement See Figure Homework Equations The Attempt at a Solution I honestly don't know how to start this problem, I tried cutting out the current source and I'm thinking I should get something like a voltage divider. Does that help in any way? A slight push to get...
  30. J

    Uncovering Common Interests in Social Networks: A Rating System Approach

    I think an interesting problem would be trying to deduce how likely you are likely to enjoy a piece of internet content by how well your friends like it. We all have different backgrounds and interest and some things have more mass appeal then others. If you take two friends, you can have widely...
  31. Z

    Bayesian Network for Continuous Random Variable?

    There are no Bayesian Networks for continuous random variables, as far as I know. And the Netica Bayesian Network software discretize continuous random variables to build bayesian models. Are there any reasons for this? Has anyone proposed continuous random variable bayesian networks?
  32. G

    How do I set up a Router/Netgear Powerline Ethernet Network?

    I'm about to purchase a laptop and will be looking to set up a home network in order to use it with the internet I have set up with my desktop. I'm looking to do this via Netgear Powerline Ethernet. I'm completely new to this type of thing, so I'm hoping someone knowledgeable here could see if...
  33. L

    Is a Home DSL Network Broadband?

    Today's ethernet networks [LAN only I refer] we mention [1000baseT/100baseT - RJ-45] are broadband in nature or baseband? May mixed PCs send messages simultaneously to each other and internet, all to same network part, under one switch, for example...? eg a HOME DSL NETWORK it it broadband...
  34. L

    What is the best way to design a network of capacitors with these restrictions?

    Homework Statement you and your laboratory team have been given a project by your electrical engineering professor. Your team must design a network of capacitors that has an equivalent capacitance of 2 microF and breakdown voltage of 400V. The restriction is that your team must us only 2...
  35. C

    Calculating Static Pressure Through Duct Network

    Hi, My name is CK and I have question on calculating static pressure through a ducting network. Some context: The ducting network services 360 identicle components. This is achieved by dividing a main duct into 4 branches, each servicing approximately 90 components. There is a desired...
  36. J

    Neural network controller for internal combustion engine

    I'm currently doing a project on neural network controller for an internal combustion engine to reduce emissions level. Can anyone assist me in training such models (neural networks)
  37. B

    What kind of probability distribution would you use to model network queues

    As an example, say 10 computers are connected to the network through 1 cable, (and so only 1 can be connected at anyone time) and each computer needs to be on the network for 12 minutes an hour on average, then what kind of pmf would you use to model the number of computers that simultaneously...
  38. S

    : Finding the Current and Power across each Resistor in a Complicated Network

    URGENT: Finding the Current and Power across each Resistor in a Complicated Network Homework Statement For the circuit below, a 12 V batter is connected across the points a and b. Determine the following: a) the equivalent resistance between points a and b b) the total current flowing...
  39. L

    Power network short circuit current calc

    I have a power network, two parallel generators which feed 2 parallel delta-wye transformers with a bus tie inbetween, from 690V to 33kV. These two transformers feed a bus which a whole bunch of 33kV/690V DELTA-WYE transformers hang off for distribution. There was a fault the other day at the...
  40. O

    Calculating equilibrium point of a network of springs

    Hi, I'm trying to find a way to calculate the resting position of a network of springs that is built as follows: n number of springs with identical k constant, but with different resting lengths are connected together at one end of each spring. The other end of each spring is fixed to some...
  41. C

    Equivalent Capacitance of a network

    Homework Statement To find the equivalent capacitance of the following network (image attached at the end of the post). The blue capacitors have capacitance of 2C and the black ones have a capacitance of C. Homework Equations Q = CV where Q is the charge on a capacitor, C it's capacitance...
  42. H

    2 computers connected to the same network by the internet

    Hello, if we have 2 computers connected to the same network by the internet(have the same network address), how can i share files between them?
  43. H

    Current in a Resistor network ( 2 parts of part b)

    Homework Statement Consider the resistor network shown in the figure below, where R1= 5\Omega and R2= 7\Omega . (a) Find the equivalent resistance between points a and b Req=([1/6 +1/5]+7)+12+6=(9.73)-1+18-1=6.32\Omega (b) If the potential drop between a and b is 12 V, find the...
  44. I

    Combining AC Signals Through an Inductor/Resistor Network

    Is it possible to combine two AC signals that are slightly out of phase, but have the same frequency, voltage and current through an inductor, resistor series network.
  45. S

    Find Voltage VX in the Given Network Circuit

    In the network given below find the voltage VX . Please check the link for the circuit diagram. And Kindly explain the method? http://i33.tinypic.com/o7u748.jpg
  46. N

    How to connect a wireless moderm(internet) to cabled network

    please how can i connect a wireless moderm that i use for my internet to a cabled network of three pcs
  47. C

    Troubleshooting Wireless Network Issues: Tips and Tricks

    1) Is there a way to view a log of who has been using my wireless network? I went to my router's configuration page, and there was a Log section under Administration tab, but I couldn't find a log. 2) I can't find the installation CD for my router, is it possible to set up a password for my...
  48. Goddar

    Equivalent resistance/ geometric resistor network

    Homework Statement hi guys, i'm having trouble applying Kirchhoff's laws to determine the equivalent resistance of this symmetrical array of resistors (see attachment); i think there is a quick trick, using 4 current loops, but i can't remember it... nor find relevant documentation – this is...
  49. H

    Potential in capacitance network

    Homework Statement A capacitance matrix represents the charge coupling within a group of conductors — that is, the relationship between charges and voltages for the conductors. Given the three conductors shown in the following link, with the outside boundary taken as a reference...
  50. T

    Engineering Network Engineer/Administrator

    How is the job outlook for Network Engineering or Network Administration? What kinds of Maths and Sciences would you recommend to add to my studies?
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