Very useful in some situations in life ...
Monday, December 18, 2006
Why My Milk Tastes Soapy?
0wn3d Flowchart Problem Solving
Very useful in some situations in life ...
Very useful in some situations in life ...
Sunday, December 17, 2006
Thursday, December 14, 2006
Using Vsepr Theory Predict Shape Of H2se
Kiddie Iron Maiden KISS MTV Unplugged
They seriously kick ass:
Incidentally, I happened to mention that the previous video guys perform "The Trooper" by Iron Maiden. It says the group is called "Gauchos" and the girl who shakes her head is 4. The other guys played too well for their early ages TBH.
... and now if the video of the original version. Find the 10 differences
They seriously kick ass:
Incidentally, I happened to mention that the previous video guys perform "The Trooper" by Iron Maiden. It says the group is called "Gauchos" and the girl who shakes her head is 4. The other guys played too well for their early ages TBH.
... and now if the video of the original version. Find the 10 differences
xD
Saturday, November 11, 2006
Ralphlaurenpigeonforge
This event was held at Sony Music Studios (New York) on August 8, 1995. In the beginning involved in the current lineup at that time in KISS, as invited guests to arrive after the original members and end the evening with a mixture of both lineups, playing songs from the repertoire, both new and old, famous and not so famous .
Unplugged Due to this the original lineup of KISS decided to meet and return to the original idea of \u200b\u200bthe makeup and character classic, that idea was shelved in 1983 to the successful reunion tour in 1996.
The above video is for "Everytime I Look At You", a song with lyrics really beautiful, interesting and even llegadora, very good indeed, even enjoyable for people with different musical tastes to the essence of KISS .
Complete list of videos:
- Comin 'Home
- Plaster Caster
- Goin' Blind
- Do You Love Me?
- Domino
- Sure Know Something
- A World Without Heroes
- I Still Love You
- Everytime I Look At You
- Man 2.000 Beth
- Nothin 'To Lose
- Rock And Roll All Nite
- Got To Choose (Bonus)
Rock Bottom See You Tonight
The alignment of the time: Gene Simmons (bass, vocals), Paul Stanley (rhythm guitar, vocals), Bruce Kulick (lead guitar) and Eric Singer (Drums, vocals) appear in the first 11 songs. Subsequently, the original members Ace Frehley (lead guitar, vocals) and Peter Criss (drums, vocals) joined Simmons and Stanley to "2.000 Man" and "Beth." For the next two, both alignments are merged to an interesting combination.
Actually I like everything, but can recommend include: "Everytime I Look At You", "Beth" (acoustic version and just, unlike the original version), "Nothin 'to Loose", "Plaster Caster, "" Sure Know Something "," Got To Choose "and" Comin 'Home ".
More Information: Here
Full Video DiVX formats in eMule:
ed2k: / /
Paul Stanley
:) !!!!! ) come in both CD and DVD, but this time the DVD extras (bonus) on Disc 1 and Disc 2 is entirely extras. That desire to listen to Satch play
"Ten Words " live ... and most still see it on DVD ... ToT Indeed, the G3 will be in the Teatro Metropolitan in Mexico City under their Satriani, Petrucci, Johnson within his Latin American tour that includes Mexico (obviously), Argentina and Brazil. Too bad that just go to City and dates of 16 and 17 October, falling on Monday and Tuesday respectively ¬ ¬
According to the Joe Satriani Official Site mid-October will be doing some promotional contests and "sneak peaks" (previews) of the DVD. To enter the site click HERE . Well, you know birthday
x) . The October 21 also coincides with the start of the Paul Stanley tour in Atlanta promoting her album
"Live to Win" .
DVD Track Listing Disc One 1. Flying In A Blue Dream 2. The Extremist
Redshift Riders 4. Cool # 9
| 9. Ice 9 10. One Robot's Dream 11. Ten Words 12. The Mystical Potato Head Groove Thing 13. The Meaning of Love 14. Made of Tears 15. Circles 16. Always With Me, Always With You 17. Surfing With The Alien 18. Crowd Chant 19. Summer Song Bonus Features: The Tour Rehearsal In The Studio Recording "Crowd Chant" The Last US Show Super Colossal Video Disc Two (All Bonus Features) Indian Documentary: "Flying In A Blue Dream" 2006 Tour Podcasts #1 - #4 European Tour Slide show CD Track Listing Disc One 1. Flying In A Blue Dream 2. The Extremist 3. Redshift Riders 4. Cool #9 5. A Cool New Way 6. Satch Boogie | 7. Super Colossal 9. Ice 9 10. One Robot's Dream Disc Two 1. Ten Words 2. The Mystical Potato Head Groove Thing 3. The Meaning of Love 4. Made of Tears 5. Circles 6. Always With Me, Always With You 7. Surfing With The Alien 8. Crowd Chant 9. Summer Song Sunday, November 5, 2006Where Can You Buycrutches For Halloween Costumes
HOLY SHIT! I've been a gypsy For a thousand years A victim of circumstance I go wherever my destiny calls I'm caught in a game of chance I stand on the outside Looking at love | I wanna get inside
No fame or fortune,
No luck of the draw
When I dance with queen of hearts
A jack of all trades
But, a loser in love
It's tearing my soul apart
Still I stand on the outside
Looking at love
I wanna get inside I stand on the outside Looking in
I stand on the outside
Looking at love Just trying to get inside I stand on the outside
Looking in
The jack of diamonds
An' the ace of spades
Try to use me, and to abuse me It seems the dealer Wont give me a chance
I'm victim of circumstance
So I stand on the outside
Looking at love
I stand on the outside
Looking in
So I stand on the outside
Looking at love
Just trying to get inside
I stand on the outside
Looking in...
-
Download Song
-
Video - Live Version with John Sykes
(Lead Guitar) and
Cozy Powell RIP † (Drums)
Tuesday, October 3, 2006
Josh Hutcherson Blue Boxer Briefs Bed
Monday, September 11, 2006
My Drivers License Is Clipped Can I Fly
Whitesnake - Gambler
02.
Eruption 03. You Really Got Me
04. Is not Talkin '' Bout Love 05. I'm The One 11. On Fire
More info
This is an album
bueniiiiiiiiiiiiiiiisimo , I recommend it 100%, is one of my favorites.
It's funny to remember that I did not like, but it caught my attention not Van Halen. He had heard his album Best Of Volume 1 having my dad, where they come from popular songs of the group, predominantly
period Van Halen with Sammy Haggar as a singer. That record did not like everything, I just liked the songs Is not Talking 'Bout Love Eruption and
(one of Eddie Van Halen
), then get hold of some affection . time later, buy the soundtrack of the movie Detroit Rock City
, which includes another topic of my favorites: Runnin 'With the Devil . far had one thing in common: the songs I liked were performed (with the exception of Eruption which is instrumental) by David Lee Roth . When you buy this album (the debut of Van Halen ) was a travel day in a "study" of the preparations we made in Monterrey in February 2002. At that time I was in the Mixup Galerias Monterrey and reviewing the records, I suddenly came across this, which was off (was 99 pesos) and best of all, was remastered and was imported from Germany, even boasted to be a hard HDCD (High Definition Compact Disc) , which is a format that Microsoft released the music industry, which basically has some extra bits compared to conventional CD (it is usually 16 bits), which can increase the sound quality a bit, being exploited by devices, such as the compu. This format was adopted by the Warner label, which I use in some of their albums "Remasters", including this and others I've seen Houses of the Holy
and
Physical Graffiti Led Zeppelin of , to name other examples.
this disc already had his eye since December 2001 but did not encourage me to buy it until that time in the Mixup's Gallery in 2002 during the trip. remember on that trip was the idea of \u200b\u200bbuying discs from AC / DC to complete my collection of that group, buy 2: High Voltage Powerage
and, besides the Van Halen of that era. .. say: an "extra." Once you listen to mine surprise, the disc "Extra" was what I liked most of the 3, both for music, for the lyrics, the sound quality and voice of David Lee Roth, the original singer and my favorite Van Halen final , simply because the best music of Van Halen was in its time ... then they were only flashes for my taste.
The work of all members
Alex Van Halen (drums, brother of Eddie), Michael Anthony (bass), David Lee Roth (vocals) and Eddie Van Halen (guitarist) are excellent, highlighting the Finally since their debut album to be completely outplayed an endless list of guitarists devoted to introduce a modern technique of playing the electric guitar and was elected for several consecutive years as the Rock Guitarist the year, if no bad memories from 1978 to 1982 and other occasions and in 1984. Anyway, this album is a great album, do not miss a good collection of Rock N 'Roll . Note: The disk is to download in this post I have no idea how good it sounds, but I promise to upload my album coming soon, stay tuned.
Update:
My drive and the "gravel" and converted to MP3, now available on the Download link
above.
, which includes another topic of my favorites: Runnin 'With the Devil . far had one thing in common: the songs I liked were performed (with the exception of Eruption which is instrumental) by David Lee Roth . When you buy this album (the debut of Van Halen ) was a travel day in a "study" of the preparations we made in Monterrey in February 2002. At that time I was in the Mixup Galerias Monterrey and reviewing the records, I suddenly came across this, which was off (was 99 pesos) and best of all, was remastered and was imported from Germany, even boasted to be a hard HDCD (High Definition Compact Disc) , which is a format that Microsoft released the music industry, which basically has some extra bits compared to conventional CD (it is usually 16 bits), which can increase the sound quality a bit, being exploited by devices, such as the compu. This format was adopted by the Warner label, which I use in some of their albums "Remasters", including this and others I've seen Houses of the Holy
Physical Graffiti Led Zeppelin of , to name other examples.
this disc already had his eye since December 2001 but did not encourage me to buy it until that time in the Mixup's Gallery in 2002 during the trip. remember on that trip was the idea of \u200b\u200bbuying discs from AC / DC to complete my collection of that group, buy 2: High Voltage Powerage
and, besides the Van Halen of that era. .. say: an "extra." Once you listen to mine surprise, the disc "Extra" was what I liked most of the 3, both for music, for the lyrics, the sound quality and voice of David Lee Roth, the original singer and my favorite Van Halen final , simply because the best music of Van Halen was in its time ... then they were only flashes for my taste.
The work of all members
Alex Van Halen (drums, brother of Eddie), Michael Anthony (bass), David Lee Roth (vocals) and Eddie Van Halen (guitarist) are excellent, highlighting the Finally since their debut album to be completely outplayed an endless list of guitarists devoted to introduce a modern technique of playing the electric guitar and was elected for several consecutive years as the Rock Guitarist the year, if no bad memories from 1978 to 1982 and other occasions and in 1984. Anyway, this album is a great album, do not miss a good collection of Rock N 'Roll . Note: The disk is to download in this post I have no idea how good it sounds, but I promise to upload my album coming soon, stay tuned.
My drive and the "gravel" and converted to MP3, now available on the Download link
above.
Thursday, September 7, 2006
Mobile Phone Jammer Legal In Australia??
RLY
... very good! IMHO, it hurts: jjjoderrr, eshto eshta eshpañolao '
... very good! IMHO, it hurts: jjjoderrr, eshto eshta eshpañolao '
Sunday, August 20, 2006
Lobster Fishing Boat Design
Charles Bronson Van Halen - Van Halen
Gene Simmons.
she fell ... PWNEANDO was well cool a Mariquina of NSHIT . !
the power of Paul Stanley and !!!!!!!!!, salve a
Wednesday, August 16, 2006
Were Can I Watch South Park On My Ipod Online
Homer (as Donkey Kong) vs Mario
Tracklist:
All Along The Watchtower
Purple Haze Hey Joe The Wind Cries Mary
Angel
Voodoo Child (Slight Return)
Tracklist:
All Along The Watchtower
Purple Haze Hey Joe The Wind Cries Mary
- Foxy Lady
- Burning Of The Midnight Lamp
- Highway Chile
- Crosstown Traffic
- Castles Made Of Sand
- Long Hot Summer Night
- Red House Manic Depression
- Gypsy Eyes Little Wing Fire
- Wait Until Tomorrow
- Star Spangled Banner (Live) Wild Thing
- (Live) Download
Kyphosis In Jacksonville Fl
KISS * NSYNC
Indeed, the IFE said that AMLO not win. I clarify that I did not vote for and displayed according to their skills is not a suitable person for the presidency of Mexico, including none of the candidates (for my taste) it was, but there must be a puppet there. On the other hand, there are 2 things that concern me:
- The innocence of people to be driven by TV ads (all games). - The strange thing that was the outcome of the vote count.
It became rare because only final count rose and the Peje Calderon down, it seems that "they went out of control" and "applied the adjustment." Regardless of the candidates who were in this, I worry both the slowness of the IFE in the count as the distrust generated by this arbitrary and supposedly impartial institution. What would have happened if the roles of Calderon and Peje were exchanged?
In short, elections became "Peje yes" and "Peje no." The vast majority of people who have to do with my life on the Internet (read people with whom you chat, visit their website, etc.). Peje are against, but to be objective, we must know both sides. Today I found this page
Note: Let me also, my internet life is not everything. Talk with people in favor of AMLO, but just not convinced me, neither of Calderon. I like everyone I know
all pages related to the topic. In my opinion proposals of the candidates are not relentless and untouchable, remember (should know) that the executive (better known as president of the repulbica) is not completely authoritarian power and need majority support in the Legislature (mainly).
- The innocence of people to be driven by TV ads (all games).
It became rare because only final count rose and the Peje Calderon down, it seems that "they went out of control" and "applied the adjustment."
In short, elections became "Peje yes" and "Peje no."
, which defends the AMLO and the few I've seen in that position.
Who knows if there is fraud or not, but what a fact is that we will never know the "what would happen" if each of the candidates were in office. Note: Let me also, my internet life is not everything. Talk with people in favor of AMLO, but just not convinced me, neither of Calderon. I like everyone I know
all pages related to the topic. In my opinion proposals of the candidates are not relentless and untouchable, remember (should know) that the executive (better known as president of the repulbica) is not completely authoritarian power and need majority support in the Legislature (mainly).
Monday, July 10, 2006
Do I Need A Small Game
Jimi Hendrix-The Ultimate Experience
The latest update to Microsoft's much-malignant Internet Explorer is getting a plug from an unlikely source. The third beta version of IE 7 debuted last week. Updates to the software, due for final release at the end of this year, include tabbed browsing, RSS support, a search box on a more streamlined toolbar and Improved security.
browser Remain Critics of the legion. But one person from outside the Microsoft campus who's got some good things to say is Blake Ross, one of the original developers of Firefox, the browser that's had IE looking over its shoulder for quite a while now. In an interview with Todd Bishop of the Seattle Post-Intelligencer, Ross said this of the test version: "The truth is that it actually looks pretty good."
In this case, the flattery seems to have been provoked by no small amount of imitation: "They did exactly what we were expecting them to do, which was take a bunch of time and get IE 7 up to feature parity with Firefox," Ross said. He quickly got around to adding that by the time Microsoft's updated browser comes out, Firefox should again be a couple steps ahead. Fuente
Comment: The latest update to Microsoft's much-malignant Internet Explorer is getting a plug from an unlikely source. The third beta version of IE 7 debuted last week. Updates to the software, due for final release at the end of this year, include tabbed browsing, RSS support, a search box on a more streamlined toolbar and Improved security.
browser Remain Critics of the legion. But one person from outside the Microsoft campus who's got some good things to say is Blake Ross, one of the original developers of Firefox, the browser that's had IE looking over its shoulder for quite a while now. In an interview with Todd Bishop of the Seattle Post-Intelligencer, Ross said this of the test version: "The truth is that it actually looks pretty good."
In this case, the flattery seems to have been provoked by no small amount of imitation: "They did exactly what we were expecting them to do, which was take a bunch of time and get IE 7 up to feature parity with Firefox," Ross said. He quickly got around to adding that by the time Microsoft's updated browser comes out, Firefox should again be a couple steps ahead. Fuente
:'(... nooo xD
)
Maxthon (and hence the IE engine) due to a very dynamic management of tabs and groups, just what I need.
not defend IE, Firefox but some come to believe that Firefox is "safe and fast" Bullshit
.
Truth insurance you have is due to opportunism: hackers got tired of playing with IE as Microsoft never bothered to give a good solution, and fast ... pos ... ehm ... "Give more memory ... if ..." ... hehehe ... well, seriously: = slow to open Firefox and
"cargodediferentemaneralaspaginasparaqueparezcarapido"
. Ultimately the speed depends (almost all) of the Internet connection and the benefits / limitations of the hardware of the computer, two separate issues in the browser, which offers a slight (almost negligible or in some cases ideational) improvement. Firefox's security is not a big thing out there is beyond popups and bit level encryption current makes it difficult and slow especially the hack. Because so sarcastic mention of the "dame memory" in relation to Firefox? simple: I have opened Firefox and Maxthon, both without any page open, the only thing that appears in them is something white (well, Firefox throws a little more to gray) and press CTRL ALT DELETE, hit the "Task Manager Windows "and we have in the Processes tab? Firefox: 31.052 kb
and Maxthon: 2.620 kb , curious no? SI , will be worth as much RAM in Firefox? I do not think
. Well, enjoy whatever your browser, I do not care what I wear, almost reaching to the extent that I do not care. Only conclude that Firefox is not the BIG thing that many think IMHO. LOL
Note: Do not believe everything you read on the Internet, even what this post. The above information is based on results derived from personal experience. Create your own opinion.
)
Maxthon (and hence the IE engine) due to a very dynamic management of tabs and groups, just what I need.
not defend IE, Firefox but some come to believe that Firefox is "safe and fast" Bullshit
.
Truth insurance you have is due to opportunism: hackers got tired of playing with IE as Microsoft never bothered to give a good solution, and fast ... pos ... ehm ... "Give more memory ... if ..." ... hehehe ... well, seriously: = slow to open Firefox and
"cargodediferentemaneralaspaginasparaqueparezcarapido"
. Ultimately the speed depends (almost all) of the Internet connection and the benefits / limitations of the hardware of the computer, two separate issues in the browser, which offers a slight (almost negligible or in some cases ideational) improvement. Firefox's security is not a big thing out there is beyond popups and bit level encryption current makes it difficult and slow especially the hack. Because so sarcastic mention of the "dame memory" in relation to Firefox? simple: I have opened Firefox and Maxthon, both without any page open, the only thing that appears in them is something white (well, Firefox throws a little more to gray) and press CTRL ALT DELETE, hit the "Task Manager Windows "and we have in the Processes tab? Firefox: 31.052 kb
and Maxthon: 2.620 kb , curious no? SI , will be worth as much RAM in Firefox? I do not think
. Well, enjoy whatever your browser, I do not care what I wear, almost reaching to the extent that I do not care. Only conclude that Firefox is not the BIG thing that many think IMHO. LOL
Note: Do not believe everything you read on the Internet, even what this post. The above information is based on results derived from personal experience. Create your own opinion.
Saturday, July 8, 2006
Loreal Color Rays Fucshia Flash Stores
6 days after elections ... Firefox
This page has a menu with the most fun I've encountered on the Internet. I've seen better menus online, but how cool is that entertained me for a while and I started to play several notes of some songs that went through my mind at that time xD , although this is
LOL because that should better use Frutiy Loops or something like that, but nah, the combination of coincidence, time and space was so fun.
Bonus:
- This page has a menu with the most fun I've encountered on the Internet. I've seen better menus online, but how cool is that entertained me for a while and I started to play several notes of some songs that went through my mind at that time xD , although this is
LOL because that should better use Frutiy Loops or something like that, but nah, the combination of coincidence, time and space was so fun.
Bonus:
- Learn more about Carmine Appice - O RLY?
-
Learn more about "O RLY?" {o, o} sat just feet away from a laptop computer that suddenly exploded into flames, in what could have been a deadly accident.
Gaston, our astonished reader reports: " The damn thing was on fire and produced several explosions for more than five minutes ". Should you witness such an event, his advice is, "
Don't try anything courageous/stupid, stay away, away, away! "
" For the record, this is a Dell machine ", notes Gaston. " It is only a matter of time until such an incident breaks out on a plane
", he suggests.
Our witness managed to catch all the action in these amazing pictures.
"
Fire extinguishers leave a mess on your suit and belongings, pack your stuff (if you can) and leave, leave, leave!
" I Advise. -
Learn more about "O RLY?" {o, o} sat just feet away from a laptop computer that suddenly exploded into flames, in what could have been a deadly accident.
Gaston, our astonished reader reports: " The damn thing was on fire and produced several explosions for more than five minutes ". Should you witness such an event, his advice is, "
Don't try anything courageous/stupid, stay away, away, away! "
" For the record, this is a Dell machine ", notes Gaston. " It is only a matter of time until such an incident breaks out on a plane
", he suggests.
Our witness managed to catch all the action in these amazing pictures.
"
Fire extinguishers leave a mess on your suit and belongings, pack your stuff (if you can) and leave, leave, leave!
Source: The INQUIRER
LOL ... This fact confirms the theory that Dell Computers (especially laptops) Sucker BIG TIME. Although they are priced "attractive" by the amount of "acceptable" benefits that these computers have not forget that "you get what you pay for."
according to experience and experiences from nearby sources, the recommended Laptops pa'l mash (ie, hold) are from brands such as IBM (Thinkpad) and Acer, are also out there but the Toshiba.
eg, an HP has a Pentium 4, while a Compaq Celeron that "compete" with the former, but not arrived yet. Anyway remember that a good laptop can cost you an egg and half the other so that in any case must care for the "investment", but whatever you Dell: are pulled !!!... xD haha the waiter's face "
o_O WTF?
"
Conclusion:
I LOL'D
Friday, July 7, 2006
Monday, June 26, 2006
Saturday, June 24, 2006
Tuesday, June 6, 2006
Thursday, January 26, 2006
Cost Of Jcpenny Haircut
The finite element method in engineering.
engineering calculation (Finite Element Analysis)
One of the fundamental tasks of the engineer is the analysis and calculation, this is the quantitative prediction of system behavior (system) technology or process to proceed with design efficient or to meet production specifications.
Examples thereof may be found in areas of heat flow, fluid mechanics, electromagnetics, chemical reactions and others.
This should make use of concepts of physics, chemistry and mathematics, to develop a mathematical model of the system or process under consideration. This model is only a system of equations whose unknowns represent magnitudes of technological interest for describing the behavior of the object under analysis. Consequently, to perform the prediction itself, the engineer has to solve the above equations quantitatively to engage, then to the technical interpretation and analysis of Results. many situations, the relevant models involve boundary value problems governed by partial differential equations. To mention some of these cases may include the structural study of automobiles, airplanes, bridges, or field analysis of heat flow in machine components, fluid flow, filtration in earth dams, etc.Debido to the great difficulty obtain analytical solutions to the equations cited, engineering has been used historically to use simplified models based on experimental results, experience and the best in a few particular mathematical solutions for a more accurate model. This general engineering methodology has been very successful and is still doing. However, it is important to note that this is a methodology that presents strong limitations on the scope of analysis, a fact that becomes more serious when one considers the growing needs of technology has changed moderna.Este box with the advent of electronic computer and the associated development of computational methods. In the context referred important numerical techniques have appeared among the most important are the methods of finite differences, boundary elements and elements finitos.En particular the latter is the more powerful and therefore more utilizado.A the following is a brief description of it and then comment on some of its many applications in engineering practice.
engineering problems.
engineering problems are studied with mathematical models that represent physical situations, these models are differential equations with boundary and initial conditions determinadas.Las differential equations are derived, which are derived by applying fundamental laws and principles of nature to systems, these represent the mass balance, strength or energy.
When possible, the exact solution These equations show the behavior of a system under study under certain conditions, analytical solutions are composed of two parts (1) a homogeneous part and (2) a particular part.
In any engineering problem, there are two kinds of parameters that influence the way the system behaved, first are the parameters that give information on the natural behavior of a given system, these include properties such as modulus of elasticity, thermal conductivity and viscosity (see picture).
Then there are the parameters that produce a disturbance or alteration in the system as external forces, moments, temperature difference the middle and pressure differences in fluid flow.
natural behavior of a system that follows is the homogeneous part of the solution of differential equations, in contrast, the parameters that cause disturbances appear in the particular solution.
is important to understand the role of these parameters in modeling with finite element techniques, in terms of their respective appearances of the so-called matrix hardness or rigidity (stiffness) and conductance matrices and load or force.
characteristic systems always have the stiffness matrix, the matrix of conductance or resistance matrix, while the parameters that produced riots in the matrix load.
numerical analysis.
There are many practical problems in engineering which can not obtain the exact solution, this can be attributed to the natural complexity of differential equations or difficulties that may occur with the boundary conditions or initial.
To address these problems we numericas.En contrasting approaches to the analytical solution, which shows the exact behavior of a system at any point on it, the numerical solutions approximate the exact solution only at discrete points called nodes.
The first step in any numerical procedure is the discretization, this process splits the middle interest in a small number of subregions and nodes.
There are two kinds of numerical methods: (1) finite difference method and (2) finite element method.
With the finite difference method, the differential equation is written for each node and the derivatives are replaced by difference equations, this is achieved with a set of simultaneous linear equations, although this method is easy to understand and use simple problems, presents difficulties when applied to complex geometries and complex boundary conditions, this situation is true for problems with non-isotropic material properties (which have the same properties in all directions).
In contrast, the finite element method uses integral formulations rather than a difference equation for a system of algebraic equations, moreover approximate a continuous function is assumed to represent the solution for each element, the complete solution is generated by connecting or assembling the individual solutions, allowing the continuity of the boundaries ínterelementales.
then drawn some engineering systems and their parameters,
Basics finite element method
is a general method for solving boundary value problems governed by ordinary or partial differential equations. In essence it is a technique which replaces the algebraic differential problem on the other, roughly equivalent to the general techniques of known resolution. To do this makes use of "discretizing" or subdivision of a region over which the equations are defined in simple geometric shapes called finite elements. The material properties and relationships governing these elements are expressed in terms of unknown values \u200b\u200bin the "corners" of the elements or nodes (see Figure 1).
One advantage of this method is its ease of implementation in a computer program, which in turn is a condition base for use as the treatment of a particular problem must be a very large number of operations to solve algebraic systems of the order of hundreds or thousands of equations. However, this amount is not a limitation with today's standard computers.
The basic ideas of this method originated in progress in the structural analysis of the aviation industry in the 50s. In the '60s the method was generalized to the approximate solution of problems of stress analysis, fluid flow and heat transfer. The first book on finite elements was published in 1967 by Zienkiewicz and Cheung. In the 70's The method was extended to the analysis of nonlinear problems of continuum mechanics. Today, the method can solve almost any physical situation can be formulated by a system of differential equations.
In the beginning the finite element method failed massively to the practice of engineering because of the unavailability of computers in engineering education and on the other the requirement of expert knowledge not only of technical and mathematical models but also relevant computer programming. Currently, the situation is completely different, and that modern personal computers seamlessly support powerful general-purpose programs easy to use.
Figure 1
The process of analyzing a physical problem using finite elements shown in Figure 1. The geometry can be defined by the analyst or created from a CAD program. The second step is to define the mathematical model to solve. This is the fundamental step which specifies the type of equations to determine the boundary conditions, material properties, and other details about the method itself. Once completed this definition the program automatically solves the relevant equations and provides results in a form appropriate to the analyst. Applications
elastohydrodynamic model of a bearing.
Figure 2 shows the pressure distribution developed in a bearing. Such a solution was reached by considering the two-dimensional elastohydrodynamic coupled problem, ie trying together to obtain the pressures of the flow of lubricant within the bearing (using the modified Reynolds equation) and modeling it as an elastic plate simply supported at its ends. This treatment allows an approximation better than conventional analytic models of pressure distribution inside the bearing when considering strain simultaneously its effects. It is also possible to consider the effects on the edges of the bearings to work with a two-dimensional model. Figure 2
Dynamic study of a dam - reservoir
This example has developed a dynamic analysis of a gravity dam with the reservoir of liquid that interacts with it. It has been considered for this horizontal sinusoidal excitation (representative, eg an earthquake) on the solid part of the domain (prey). From the classical analytical standpoint, this problem must be addressed by obtaining, first, the hydrodynamic pressure in the reservoir, considering the dam as a rigid body, at a later stage can determine the elastic problem in the structure. Using a finite element computational model can be analyzed simultaneously the dynamics in the reservoir and dam. Can easily be other complexities such as interaction with stratified foundations, inspection of galleries in the dam, the dam complex geometries, etc. Figure 3 shows the finite element mesh of the model, while Figure 4 shows the pressure at the interface between liquid and solid media.
Figure 3
Figure 4
Concluding remarks
This article has sought to spread briefly one of the most important tools with which the engineer has to analyze complex problems a few years ago were intractable.
Paradoxically, the curriculum of the engineering still gives this method the proper place, thus reducing the possibilities of analysis of future engineers. This situation must be remedied in the short term in order to train engineers to be able to use powerful computer technology that are at hand for modern and more efficient designs. Link to
Technology. Link to
Science.
English words for searching: Finite Element Procedures, engineering analysis, stress analyzes, Vibration Analysis, computer simulation.
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engineering calculation (Finite Element Analysis)
One of the fundamental tasks of the engineer is the analysis and calculation, this is the quantitative prediction of system behavior (system) technology or process to proceed with design efficient or to meet production specifications.
Examples thereof may be found in areas of heat flow, fluid mechanics, electromagnetics, chemical reactions and others.
This should make use of concepts of physics, chemistry and mathematics, to develop a mathematical model of the system or process under consideration. This model is only a system of equations whose unknowns represent magnitudes of technological interest for describing the behavior of the object under analysis. Consequently, to perform the prediction itself, the engineer has to solve the above equations quantitatively to engage, then to the technical interpretation and analysis of Results. many situations, the relevant models involve boundary value problems governed by partial differential equations. To mention some of these cases may include the structural study of automobiles, airplanes, bridges, or field analysis of heat flow in machine components, fluid flow, filtration in earth dams, etc.Debido to the great difficulty obtain analytical solutions to the equations cited, engineering has been used historically to use simplified models based on experimental results, experience and the best in a few particular mathematical solutions for a more accurate model. This general engineering methodology has been very successful and is still doing. However, it is important to note that this is a methodology that presents strong limitations on the scope of analysis, a fact that becomes more serious when one considers the growing needs of technology has changed moderna.Este box with the advent of electronic computer and the associated development of computational methods. In the context referred important numerical techniques have appeared among the most important are the methods of finite differences, boundary elements and elements finitos.En particular the latter is the more powerful and therefore more utilizado.A the following is a brief description of it and then comment on some of its many applications in engineering practice.
engineering problems.
engineering problems are studied with mathematical models that represent physical situations, these models are differential equations with boundary and initial conditions determinadas.Las differential equations are derived, which are derived by applying fundamental laws and principles of nature to systems, these represent the mass balance, strength or energy.
When possible, the exact solution These equations show the behavior of a system under study under certain conditions, analytical solutions are composed of two parts (1) a homogeneous part and (2) a particular part.
In any engineering problem, there are two kinds of parameters that influence the way the system behaved, first are the parameters that give information on the natural behavior of a given system, these include properties such as modulus of elasticity, thermal conductivity and viscosity (see picture).
Then there are the parameters that produce a disturbance or alteration in the system as external forces, moments, temperature difference the middle and pressure differences in fluid flow.
natural behavior of a system that follows is the homogeneous part of the solution of differential equations, in contrast, the parameters that cause disturbances appear in the particular solution.
is important to understand the role of these parameters in modeling with finite element techniques, in terms of their respective appearances of the so-called matrix hardness or rigidity (stiffness) and conductance matrices and load or force.
characteristic systems always have the stiffness matrix, the matrix of conductance or resistance matrix, while the parameters that produced riots in the matrix load.
numerical analysis.
There are many practical problems in engineering which can not obtain the exact solution, this can be attributed to the natural complexity of differential equations or difficulties that may occur with the boundary conditions or initial.
To address these problems we numericas.En contrasting approaches to the analytical solution, which shows the exact behavior of a system at any point on it, the numerical solutions approximate the exact solution only at discrete points called nodes.
The first step in any numerical procedure is the discretization, this process splits the middle interest in a small number of subregions and nodes.
There are two kinds of numerical methods: (1) finite difference method and (2) finite element method.
With the finite difference method, the differential equation is written for each node and the derivatives are replaced by difference equations, this is achieved with a set of simultaneous linear equations, although this method is easy to understand and use simple problems, presents difficulties when applied to complex geometries and complex boundary conditions, this situation is true for problems with non-isotropic material properties (which have the same properties in all directions).
In contrast, the finite element method uses integral formulations rather than a difference equation for a system of algebraic equations, moreover approximate a continuous function is assumed to represent the solution for each element, the complete solution is generated by connecting or assembling the individual solutions, allowing the continuity of the boundaries ínterelementales.
then drawn some engineering systems and their parameters,
Basics finite element method
is a general method for solving boundary value problems governed by ordinary or partial differential equations. In essence it is a technique which replaces the algebraic differential problem on the other, roughly equivalent to the general techniques of known resolution. To do this makes use of "discretizing" or subdivision of a region over which the equations are defined in simple geometric shapes called finite elements. The material properties and relationships governing these elements are expressed in terms of unknown values \u200b\u200bin the "corners" of the elements or nodes (see Figure 1).
One advantage of this method is its ease of implementation in a computer program, which in turn is a condition base for use as the treatment of a particular problem must be a very large number of operations to solve algebraic systems of the order of hundreds or thousands of equations. However, this amount is not a limitation with today's standard computers.
The basic ideas of this method originated in progress in the structural analysis of the aviation industry in the 50s. In the '60s the method was generalized to the approximate solution of problems of stress analysis, fluid flow and heat transfer. The first book on finite elements was published in 1967 by Zienkiewicz and Cheung. In the 70's The method was extended to the analysis of nonlinear problems of continuum mechanics. Today, the method can solve almost any physical situation can be formulated by a system of differential equations.
In the beginning the finite element method failed massively to the practice of engineering because of the unavailability of computers in engineering education and on the other the requirement of expert knowledge not only of technical and mathematical models but also relevant computer programming. Currently, the situation is completely different, and that modern personal computers seamlessly support powerful general-purpose programs easy to use.
Figure 1
The process of analyzing a physical problem using finite elements shown in Figure 1. The geometry can be defined by the analyst or created from a CAD program. The second step is to define the mathematical model to solve. This is the fundamental step which specifies the type of equations to determine the boundary conditions, material properties, and other details about the method itself. Once completed this definition the program automatically solves the relevant equations and provides results in a form appropriate to the analyst. Applications
elastohydrodynamic model of a bearing.
Figure 2 shows the pressure distribution developed in a bearing. Such a solution was reached by considering the two-dimensional elastohydrodynamic coupled problem, ie trying together to obtain the pressures of the flow of lubricant within the bearing (using the modified Reynolds equation) and modeling it as an elastic plate simply supported at its ends. This treatment allows an approximation better than conventional analytic models of pressure distribution inside the bearing when considering strain simultaneously its effects. It is also possible to consider the effects on the edges of the bearings to work with a two-dimensional model. Figure 2
Dynamic study of a dam - reservoir
This example has developed a dynamic analysis of a gravity dam with the reservoir of liquid that interacts with it. It has been considered for this horizontal sinusoidal excitation (representative, eg an earthquake) on the solid part of the domain (prey). From the classical analytical standpoint, this problem must be addressed by obtaining, first, the hydrodynamic pressure in the reservoir, considering the dam as a rigid body, at a later stage can determine the elastic problem in the structure. Using a finite element computational model can be analyzed simultaneously the dynamics in the reservoir and dam. Can easily be other complexities such as interaction with stratified foundations, inspection of galleries in the dam, the dam complex geometries, etc. Figure 3 shows the finite element mesh of the model, while Figure 4 shows the pressure at the interface between liquid and solid media.
Figure 3
Concluding remarks
This article has sought to spread briefly one of the most important tools with which the engineer has to analyze complex problems a few years ago were intractable.
Paradoxically, the curriculum of the engineering still gives this method the proper place, thus reducing the possibilities of analysis of future engineers. This situation must be remedied in the short term in order to train engineers to be able to use powerful computer technology that are at hand for modern and more efficient designs. Link to
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English words for searching: Finite Element Procedures, engineering analysis, stress analyzes, Vibration Analysis, computer simulation.
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