Boost Definition and 140 Threads

i always see people carrying a starbucks coffee or bottled tea in library and lectures. My friends said that drinking these can make people feel awake and think faster. Is it true? As they are quite expensive and the taste is quite bitter. Are there other alternative/cheaper ways to boost...

Homework Statement Show that the anticommutator of parity and boost is zero. Homework Equations \{\mathcal{P},K^{i}\}=0 The Attempt at a Solution Let the anti commutator act on a state \{\mathcal{P},K^{i}\}\Psi(t,\vec{x})=\mathcal{P}K^{i}\Psi(t,\vec{x})+K^{i}\mathcal{P}\Psi(t,\vec{x})...

Hi, I've read quite a few times now in group theory and QFT books that [X_i,Y_j]=i\epsilon_{ijk}Y_k can be regarded as saying that \vec{Y} , the vector of boost generators transforms as a vector under rotations (where X are SO(3) generators). I don't really understand why this implies...

hi, i am pretty new with electronics, and i can't find any simple boost converter circuts on the enternet. i would like to make the circut THE MOST SIMPLE i can, with the fewest possible parts. for a power source, i have 9v-1w. for the output power, i would like to send a thin spark from 1...

hi, i am pretty new with electronics, and i can't find any simple boost converter circuts on the enternet. i would like to make the circut THE MOST SIMPLE i can, with the fewest possible parts. for a power source, i have 9v-1w. for the output power, i would like to send a thin spark from 1...

Hi. I have a blower motor I am trying to run at 20v from a 12vdc system. At 12v it draws 12A, but I need it to get to a higher RPM. I'm not sure what the surge current is (turning on). Anyway, I was talking to someone else and they didn't think increasing the voltage with a BC would increase the...

By courses I mean like Multivariable Calculus, Differentials, Physics 301, etc...

I was thinking that if i have for example a boost in the direction of x, then the boost should be equivalent to an hyperbolic rotation of the y and z axes in the other direction. I don't know if it's true or not. Then I want to know if somebody knows this result or why is false? I was...

I was reading a section on lorentz boosts and i need some help understanding what they did: the book starts off by defining the line element dS where: (dS)^2 = -(CΔt)^2 + dx^2 + dy^2 + dz^2 then they say: "consider the analogs of rotations in the (ct) plane. These transformations leave...

By Denise Mann, Health.com April 22, 2010 12:56 p.m. EDT With finals coming up for many, I wish I was aware of this when in college. If you try it, and it really helps, (I don't know how you make yourself dream) please report back. Rhody... Edit: MATH_IS_HARD reported a similar...

Apologies if this is a duplicate thread, I searched and could not find a topic on this news article posted. http://www.usatoday.com/news/health/2010-04-21-braingames21_ST_N.htm" Guess all that Sudoku I play didn't do a darn thing for me.

HI, How do i feed the current information into micro-controllers ADC input to calculate the total power? Please help. I am using atmel tiny45 and its a boost converter output current i want to measure for output power. Thanks.

I am contemplating a new PC build, but I feel that since I am so neurotic about details, it is not going to happen for quite some time. I need to put a lot more research into it. But for the time being, I would like to maximize the performance I get out of my old Dell dimension. The specs right...

hello..im final year student..i have some problem that i doesn't know how the first step to design the boost converter circuit which is step up the voltage from 5v reach at 24 volt..anybody can help me..:smile:

I get dog doo-doo for service in my house. I have been through all the major carriers and have found that it is simply just the way it is (that is, it's the house, not the service). My house is in a decent sized city with plenty of cell-service everywhere else, but the house 'sits low' with...

This is close enough to a homework question so I've put it in this section, though maybe it should be posted in the EE section. I've been looking at the equations for boost converters today, and I'm interested in the problem of how long it would take a bank of capacitors to charge through an...

Hi guys, I have this problem for my undergrad final year project. I'm trying to design a control system to regulate the voltage output for a boost converter and I am not too familliar with control theory. I've built the control system in MATLAB based on the basic boost equation...

01.http://img2.orkut.com/images/milieu/1/1213787033773/32174292/pt/Zpog0ya.jpg How to post image here Its our rc car driven by 3.2 hpi engine 2 speed transmission system, bell crank steering mechanism , fuel use nitro+mthnol its a two stroke engine two wheel drive question:how to increase...

Ok, first post so be nice guys! I've designed and simulated a design for controlling a brushed DC series motor in OrCAD and it does what i was aiming for it to do. Which is to step down voltage to an average of 50% with duty cycle at 50% etc. I thought I had it all figured out but...

Hi there guys, I'm trying to design a bidirectional buck boost converter as part of a larger three way solar charge controller project. The buck boost part will be connected to an energy storage device, which will probably be a 2F 5V ultracapacitor. The aim is to step down 9v source to...

i need help please, now i try to design boost converter that robust to the variation of the input votlage. I'm using PSIM to simulate the design, but I'm kinda confused to make the variation of the input. What i should do? what circuit that i should create to make the input varies in PSIM??..

hi there! Just wondering... if i have a photon moving in the z direction 4 momentum given by (0,0,1,1) and I lorentz boost it in the z direction... would I get the same original 4 momentum (0,0,1,1) because i thought that boosting something at the speed of light means that it remains at...

So, i want to go to grad school for math. i just got accepted into a math honor society. Will this look really good for grad school?

I've been slowly self studying Lagrangian topics, and have gotten to Noether's theorem. I've tried application of a Lorentz boost to all the terms in the Lorentz force Lagrangian (which is invariant with respect to boost since it has only four vector dot products). Then using Noether's...

Hello Every1 I'm doing a project on PWM Z-source inverter(Forget about the voltage ratings for now). I have a basic doubt in its operation. As we all Know Z-source inverter can provide both Buck and Boost output. For a boost output (in case of 1phase H-Bridge type) we have to fire both the...

i'm supposed to design a boost converter with the following parameters: supply voltage = 9-15 v output voltage = 18 v output current = 0.1 - 2 amp voltage ripple = 5% efficiency = 80 - 98% i came up with the following: let f= 30 KHz min C=12.3 uF min L=375 uH average supply current = 4 ampi...

Einstein Summation Convention / Lorentz "Boost" Homework Statement I'm struggling to understand the Einstein Summation Convention - it's the first time I've used it. Would someone be able to explain it in the following context? Lorentz transformations and rotations can be expressed in...

Can anyone please send me the simulink model of boost converter i couldnot find any in the MATLAB help tutorials... I didnot know how to give the pwm control in simulink..could anyone please send me the model..

Biologically, what does it do to provide more energy?

is a boost a rotation of a four vector? if the boost rotates an object more into the time dimension, ywo things happen: it's velocity increases. it's length contract in the direction of its motion. does this make sense? thanks!

What is the fastest speed relative to the Sun that Jupiter can eject an object onto a hyperbolic trajectory? I imagine you'd want the object to be traveling as fast as possible when it encountered Jupiter. This would give it a velocity at just under Solar escape velocity as it approached...

How can you "boost" your creativity. " Imagination is more important than knowledge " Albert Einstein. Then, the question is how could you improve your "creativity", of course i believe you must make an effort but..how? :confused: :confused: is there a formula for creativity or learning?.

Oh now this is preposterous. I agree that in "sales" socializing in places where you can meet potential clients can result in more sales, but I don't see how Zz or Moonbear cruising bars and tying one on will increase their income. Also, you do not need to drink alcoholic beverages just...

http://evo.youaremighty.com/ I do like the song and the...umm..boost in self confidence. The link works with any name, I just choose "evo" randomly :smile: Your thoughts?

Tomasz Konopka QG approach---undergrad boost Konopka graduated from Hamilton College in 2002 and went to Perimeter Waterloo for graduate study. As undergrad at Hamilton he worked with Seth Major. This could be a good plan----people who want to get into QG can see if it worked out well. Seth may...

I would like to pose the question of weather or not it is feasible to extend a wireless routers signal over an extended antena which could thread through the cealing of a building to alow a signal to be used from room to room. The building in question predates wireless networking and was...

What is a "closure type"? I first encountered it by looking at the source of the uBLAS package from boost.org -- it's essentially an implementation of the BLAS using expression templates. I noticed that a lot of the classes have a nested typedef called "closure_type" (and a...

http://www.nature.com/news/2004/041025/full/041025-9.html Great! Wait until the extreme sports folks get ahold of this one. :biggrin:

hi everyone :smile: i am a 2nd year engineering student...i have a problem here... :confused: i was asked to build a 3V to 5V dc-dc boost converter but i have no idea how to build it... i have search all over the webs but the information they gave me ain't what i want. i was asked to...

...I reposted this in general physics forum here. Tried to delete this one, but was denied access.