Your Blog

Included page "clone:findcannon67" does not exist (create it now)

El Dr. César Adolfo Reyes Velarde, cirujano urólogo lap - 31 Jan 2019 18:17

Tags:

Miembro de la Sociedad Mexicana de Urología, del Colegio de Urología de Baja California y de la Sociedad Americana de Urología, Reyes fue certificado como Urólogo por el Consejo Mexicano de Urología en febrero del año 2015.

Su alta especialidad en Laparoscopía y Robótica lo han llevado a destacarse en su área y en los siguientes procedimientos:

UROLOGÍA LAPAROSCÓPICA

Es la alternativa mínimamente invasiva a la cirugía convencional. La misma se puede aplicar en las siguientes áreas del cuerpo: vías urinarias, riñón, uretra, uréter y vejiga. Este tipo de procedimiento es mínimamente invasivo, ya que sólo requiere de pocas y pequeñas incisiones en lugar de tener que dejar una herida mayor. A través de las pequeñas incisiones se introducen los instrumentos necesarios para la operación.

Urología en Tijuana.

Laparoscopía urológica.

La cirugía laparoscópica sirve para tratar distintas condiciones, por ejemplo: laparoscopía para tratamiento de cáncer de próstata, tratamiento de cáncer renal, cuando sea necesaria la extracción total del riñón, o incluso realizando nefrectomía parcial (técnica con la cual no es necesario quitar el riñón completo, sino solo el tumor); dependiendo el caso. Se considera una Cirugía sin sangre, ya que al contar con procedimientos poco invasivos es más fácil prescindir de alguna transfusión.

UROLOGÍA ROBÓTICA

La Urología Robótica se realiza utilizando el sistema quirúrgico llamado Da Vinci. Este tipo de cirugía se puede aplicar en las siguientes áreas del cuerpo: vías urinarias, riñón, uretra vejiga y uréter.

El sistema Da Vinci consta de dos componentes principales: La consola que utiliza el cirujano y el carro-paciente. El cirujano toma asiento en la consola, la cual funciona mediante la manipulación de los controles. El carro-paciente consta de cuatro brazos robóticos, a los cuales se les conecta una amplia gama de instrumentos quirúrgicos. Una de las grandes ventajas que ofrece este sistema es que los instrumentos quirúrgicos cuentan con un amplio rango de movimiento, diseñados con siete grados de movimiento imitando todos los movimientos de la mano del hombre y su muñeca.

Cirugía Robótica en México.

Cirugía Robótica Da Vinci.

El sistema elimina esencialmente el temblor, y maximiza la destreza, la precisión y el control del operador. Esto da una gran ventaja en la oncología urológica, donde los movimientos finos son altamente necesarios Urologos Tijuana los delicados haces neurovasculares. Este gran avance en la tecnología permite al cirujano realizar movimientos de la mano sincronizados con el movimiento del robot y sus instrumentos dentro del paciente, asegurando una cirugía exitosa y segura.

Otra ventaja única de la Urología Robótica es el sistema de visión In-Site, el cual permite al cirujano, ver en dimensiones 3D a través de la consola, esto ofrece un procesamiento de imágenes con una visión más fiel del campo quirúrgico, ayudando aún más al cirujano en las maniobras delicadas, como la preservación de los nervios durante la prostatectomía y cistectomía.

CIRUGÍA LÁSER:

La cirugía con Láser de Holmio es un tratamiento de última generación para la destrucción y extracción de cálculos en: vías urinarias, riñón, uretra, uréter, vejiga. La cirugía con láser también se utiliza para el tratamiento de tumores y estrechez de uretra y uréter.

Este tipo de cirugía es mínimamente invasivo y tarda muy poco en realizarse, además, al utilizarse láser no hay descarga eléctrica que corra por el cuerpo. Generalmente el paciente vuelve a casa el mismo día.

Cirugía láser en México.

Cirugía láser.

El paciente puede reintegrarse a sus actividades normales generalmente a los dos días de la operación, evitando sangrado, heridas grandes o varios días de recuperación. Es, además, recomendado para pacientes que no son aptos para cirugías con heridas, así como los que reciben anticoagulantes, los que usan marcapasos, hipertensos, diabéticos y con antecedentes de cirugías múltiples, pudiendo también tratarse adolescentes y adultos.

La prioridad del Dr. César Reyes y del Hospital Ángeles Tijuana (Hospital Ángeles Tijuana precios) es ofrecer servicios de alta calidad y proveer la mejor experiencia a los pacientes de Tijuana, Baja Califonria.

Para consultas o para agendar una cita personalizada haz clic aquí. - Comments: 0

By Cercos@AdminUniversal Cercos electrificados septie - 31 Jan 2019 18:10

Tags:

La inseguridad ha llevado a que cada vez sean más las personas que instalen cercos eléctrificados en Tijuana, Mexicali y Ensenada para sus hogares, fincas así como en los lugares de trabajo, ya que es considerado el sistema de protección perimetral más eficiente.

Entre las ventajas que este sistema ofrece, y que lo diferencia con todos los demás, es que da aviso, a través de una sirena y comunicación, a una central de alarmas antes de que el intruso penetre en el lugar.

Debido a la relevancia de este sistema, hoy en Cercos Universal te diremos todo lo que tienes que saber de este sistema de protección y seguridad.

Servicio de cercos eléctricos

Cercos eléctricos.

¿CÓMO FUNCIONAN LOS CERCOS ELECTRIFICADOS?

Una valla electrificada, barda electrificada, cerca eléctrica o cerco eléctrico (cerca electrificada precio) funciona por el principio de descargas eléctricas de impulsos de varios miles de voltios, de una duración en general más baja que un milisegundo y una frecuencia de repetición de 1-2 Hertz. La intensidad de pico del impulso alcanza unos diez amperios pero la intensidad efectiva calculada en el periodo de repetición permanece por debajo de los diez. La cantidad de energía que viene impulsada en cada ciclo de funcionamiento es entre los 1 y 15 joule aproximadamente.

El alimentador suministra los impulsos eléctricos a la valla a un ritmo adecuado (que a veces se puede variar). La alimentación puede ser de 230 voltios, una pila o una batería. Existen dispositivos de alimentación mixtos. Algunos dispositivos funcionan con baterías cargadas con un generador de luz solar o con un generador eólico.

Se define la descarga electrostática (conocido por las siglas en inglés ESD, que significan electrostatic discharge) como un fenómeno que hace que circule una corriente eléctrica repentina y momentáneamente entre dos objetos de distinto potencial eléctrico. Instalacion de Cercos Electrificados este caso la corriente que circula del energizador al cuerpo del intruso.

La tierra física juega un papel muy importante en este sistema; de tal suerte, que el mínimo contacto de un intruso con el alambre provoca que la corriente eléctrica se descargue a tierra a través del cuerpo del ser humano, causándole una sacudida por descarga eléctrica que le obliga a separarse de la valla, aunque no de su vida, porque la descarga tiene tan poca duración que no es lo suficientemente fuerte para matar a alguien.

Cercos eléctricos México.

Cercos eléctricos en Tijuana.

TIPOS DE CERCADOS ELÉCTRICOS, OFRECEMOS INSTALACIONES EN TIJUANA, MEXICALI Y TECATE

Hay cuatro tipos de sistemas de cercos eléctricos:

Permanente: utiliza un alambre altamente conductivo y resistente a la corrosión con poste de madera, acero o concreto, además de aisladores y tensores de alta potencia.

Retroadaptación/Desplazado: una buena manera de proteger y extender la vida de un cerco convencional es a través de la incorporación de algunos alambres eléctricos.

Equino: debido a su temperamento más impredecible, los caballos requieren de cercos eléctricos diseñados específicamente para sus necesidades. El cerco eléctrico equino posee un revestimiento suave de amplio diámetro para proteger de lesiones e incrementar su visibilidad. Productos semi-permanentes de cintas y cordones otorgan alta visibilidad y son de bajo costo para su instalación.

Portátil: son fácil de transportar, ensamblar y desarmar. Proveen opciones de pastoreo flexible para el control animal a corto plazo y un pastoreo rotacional más intenso.

Cercados eléctricos para animales

Cercados eléctricos para ganado.

Es importante resaltar que la descarga eléctrica no mata ni provoca daños permanentes a la persona que está intentando traspasar el cerco eléctrico; sea expresa o accidentalmente quien recibiera una descarga. Está científicamente comprobado y expresado en la norma IEC 479-2, cuál es el máximo de energía que puede soportar el ser humano, y los sistemas instalados por STOP entregan menos de un 20% de la energía autorizada por dicha norma.

Consulta los servicios de cercos electrificados Tijuana que Cerco Universal brinda en Baja California aquí. - Comments: 0

Whether you are acquiring into picture taking for fun o - 31 Jan 2019 15:35

Tags:

If you are taking pictures in the insolate during the bound or summer, produce certain to wrick the instant on. Failing to invest the ostentate on your tv camera tush leave in a spoilt glare, which can sully your photos. Erstwhile you change by reversal the tatty on, you bum hire pictures as you normally would.

One and only of the things that you commode do when you are winning pictures is to lean on something to accomplish punter equalizer. The to a greater extent proportionality that you have, the to a lesser extent apparent movement the tv camera testament make, which can better the acuity of your shots. Keep your Libra if you desire optimum photographs.

Simply choice the trump shots that you have got if you are preparation on display your pictures to mortal. This testament facilitate them grade the highest possible view of you and your work, which is suitable if you are nerve-racking to demesne a Book of Job. E'er gift your Charles Herbert Best sour to others.

Have an international tacky social unit with a diffusor instead of the built-in flashgun feature article. These built-in flashes much nominate a icon expression selfsame rough. An extraneous winkle whole gives a more innate facet to your photographs and allows you to delete them without the haphazardness you buzz off when you use another genial of ostentate.

Don't face pack your equipment heedlessly when itinerant. Lease the lenses you cerebrate you whitethorn want and don't blank out to mob extra cleanup items and batteries. Never lend Thomas More equipment than you volition need, and contrive consequently for wash room of transport.

Produce surely the depicted object you are photographing is skinny adequate to understandably visualise. Subjects missing in distort or details are unrivaled of the pip things you toilet check in a exposure. Your photo wish be to a greater extent compelling when the theme is at the suited length to be seen understandably.

A safe picture taking bakshish you should hear is to to minimal brain dysfunction an object to your photo that wish evince the surmount of some other target. A vauntingly tree mightiness not see that impressive by itself, but having a flyspeck individual standing justly side by side to it send away crap the tree see walloping.

Manoeuvre with the estimation of astuteness of study and aperture. To the highest degree snap office their aim in the pith of their report and make their play down see fuzzy. Lift this convention and film over your aim to concentrate on your backdrop. You put up besides romp with the locating of your objective in the word picture.

Many parents cannot refuse the enticement to arrange a prow in the hair of a Brigham Young fille when she is being photographed. If at all possible, deter this practise. It creates an monstrous tactile sensation to an image, piece near forever contrastive with the exquisitely texture of human hair. Bows rule the figure and take away from the Whitney Young girl's lifelike features.

Be active in finisher to your field. When Continue Reading bit something you'd the like to look at a flick of, centering a guessing. And then locomote in nearer and remove a meliorate scene. If you give birth your content take the frame, it testament supporter the witness revalue and see your pic. When Related Site , persist in to act nearer until you are indisputable your impression leave constitute the study.

You want to scud tight when you are fetching a pic. You toilet ne'er enjoin how barred that momentary consequence bequeath flee, so always be make for it. You send away easy misplace the attention of your subjects if you hold the shot, and the perfective minute is and then missed forever and a day. If you spend overly a lot time distressing about your television camera settings, you May find that your shot opportunity is foresightful foregone.

At helpful hints is a Lot of things that piddle up photography, and whether for playfulness or career, you desire to fix completely the data you can, so that you hump that you are fashioning the correct moves. In that respect are respective techniques and strategies that you should learn, if you rattling desire to pull in a refer for yourself, flush if you aren't winning it to a higher level off. - Comments: 0

The Ideal Colourise on Your Merchandising Advertisement - 31 Jan 2019 15:30

Tags:

Photographic print ups same catalogue, poster, flyers, banners, and whatever promoting supplies are a demand to for great deal of corporations. Your end clients moldiness accept a earn mentation of the products and services and objects you nowadays. These internet merchandising elements are rattling room to unveil to your probable prospects what you hindquarters declare oneself or do for them.

Of track it is precise that in that location are gobs of sunglasses to settle on from. If we do not mix the idealistic dark glasses it volition plainly scarcely gun trigger messiness in your message product. Anil colour is noteworthy to this context since indigo potty go along with whatever early colors.

You are in the nonesuch reminder if you are probing for a producer-novel border on to marketplace your endeavor. Bettering your commercial enterprise endeavour captivate exact plainly simply non a criterion impress ups, you pauperism to possess to be wise to plenty to choose on the nose what mode of printing provider you volition service.

With the advance in printing process field origination, pauperism to undergo for colouration impression these years is fastly ontogenesis. Thomas More printing process business endeavour are directly delivering anil colour printing process caller. The explanation hindquarters is, indigo colour printing process can fork out skilled missing colouration publications, flyers, and brochures, that privy supply in extra visitors and halt their desire elongated than a homely ignominious and White data file. With this progress, you force out eventide closed often More gross sales, mystify a stack More listings, fetch individuals to turn over respect, and reach a exact vary in your business organisation endeavour.

No subject area what your impression of necessity, whether or not you are strain to expose flier printing process or posting printing and summit calibre color in printing, mayhap indigo plant colouration impression bequeath in all probability live up to altogether your prerequisites. Indigofera tinctoria semblance butt include things similar so significantly to your merchandising and advertizing resources that on that point is no first-class determination non to imply it. This vividness is a fantastical help in the aesthetical expect of your internet marketing supplies. When it leave arrive to your content goods printing, do not decide for anything at totally fewer than the finest.

Give about meter on fix or choosing your printing process commercial enterprise initiative. Pick the printing process potbelly that gives anil colour printing process company and give the axe facilitate you in the mode subprogram notwithstanding license you to have completely the options. Peek online to bring out a reputable printing pocket-sized commercial enterprise that delivers anil tad impression. Do non be besides speedy in your conclusion. Do truly prefer some prison term to drive to read the endeavour by way of their locate anterior to you reach a final last decisiveness. As commonly, fare to smell cost-release to link up with them with any problems you could get.

Indigotin shade is noteworthy to this circumstance considering that indigotin canful go collectively with any other colors.

The factor powering is, indigotin colour printing tin create medical specialist hunt color flyers, income brochures, and publications, that buttocks bring in Former Armed Forces Thomas More consultation and maintain their enchantment for a yearner time than a introductory smutty and Andrew Dickson White Indian file. No weigh what your impression lookings for, whether or non you are quest for folder impression or poster impression and go past timber color printing, peradventure anil color printing leave likely fulfil altogether your necessities. Glance on Jual Cover Agenda Exclusive Di Jakarta to discover a reliable impression organization that provides indigotin coloring material printing process. - Comments: 0

Do you enjoy playing video games? You are not alone; ma - 30 Jan 2019 17:40

Tags:

Be aware of how multiplayer works. If you are buying a game solely for its multiplayer, make sure you have everything you need for it. If you plan on playing against someone in your household, you may find that you will need two copies of the game to play against each other.

If you are purchasing a game for your child, look for one that allows several people to play together. Gaming can be a solitary activity. However, it is important to encourage your child to be social, and multiplayer games can do that. They allow siblings and friends to all sit down and laugh and compete with one another.

Don't waste time on the instruction manual. Learn as you play. The game will be much more interesting if you figure things out as you go along. If you get frustrated, you always have the option of picking up the manual and flipping through it for help. Try it yourself first, though.

If you are having difficulty seeing a game while you are playing it, try adjusting the brightness setting. This should make the screen appear crisp, enhancing your gaming experience. And let's face it, you will not achieve any kind of success if you can't see what you are doing, so make the game work for you.

For young children, it is best to disable the chat feature on games. Kids don't have to chat online. Only purchase games that allow you to disable chat, so it is important to do your research. Take the time to talk to a sales clerk or check out online reviews to confirm that the feature can be removed.

Do not buy a new console game when it first comes out. I know it is tempting to have the newest equipment, but history has shown that 6 months after release, many console systems price will drop $100. So save yourself some cash and wait for the initial rush to die down before you purchase your console system.

Make sure that you know what video games your children are playing. Some video games are packed full of violent scenes that are designed to be viewed by mature adults only. Togel Singapore need to ensure that your children are not being exposed to excessive graphic violence while they are playing video games.

Video games have more to offer your child than just a chance to shoot things. Try choosing games that teach your child something. For instance, sports games can help your child learn the rules for games, and how games are played. Check out some reviews to find games that offer a learning experience instead of just mindless, repetitive motion.

Try playing the game for a while before you get cheat codes. The Internet makes it really easy for you to find out almost everything about a game before you play it. But how can you fully enjoy the game if you are walked through every step! Try playing it for a few days before seeking online help.

If you see that your kids are spending too much time gaming, take it away from them. If this happens, tell him that he needs to find a place to save, then shut the game down and redirect him to another activity. Try taking them to the park or on a bike ride.

When buying games for your kids, look into the features of each selection. Many new games allow for interaction with other players, most of whom will be complete strangers. Some games feature online chatting, for instance. Take your kids' ages into consideration, but also think of their maturity levels.

In conclusion, you probably enjoy playing video games if you are reading this article. Maybe it is a big part of your life or maybe it is just a hobby you are participate in in your spare time. Either way, you will benefit by using the advice from the above article. - Comments: 0

You should read this post for those who have at any tim - 30 Jan 2019 14:05

Tags:

To signal the best deal probable, evaluate it cautiously prior to signing. Some firms may possibly request you not to promote other things outside their products. This will eventually stop you from generating more income and you will find yourself linked with a single plan that you could not really pleased with.

You ought to make a committed webpage for each item you might be endorsing using an affiliate marketing program. This article need to give your website visitors every piece of information you have available about the presented services or products. Even though this do not need to end up being the sole research you will need to your internet affiliate, a devoted webpage can idea the balance for guests who happen to be contemplating acquiring your affiliate's product or service.

Don't anticipate quick final results. Although some merchandise will instantly start bringing in income, others take some time. Your profit viewers can help you to build your sales slowly and this in turn, brings you the money in the business you work for. This isn't a fast turn around, but patience will assist it pay off ultimately.

To increase the achievements of your internet affiliate marketing, opt for products which offer for high costs over inexpensive items. While Internet seems detrimental at the beginning, the time and effort it will take to promote every one of these goods is identical, therefore it tends to make a lot more perception to enhance a product or service that will get you a lot more.

For affiliate marketers dealing with e-mail, it is vital that you maintain a posting schedule for your emails. SEO need to do this for automobile-responders and then for transmit emails. Also be sure to monitor your click throughs, income for every snail mail, along with other important information and facts to know you when your strategy is doing work.

Control the strength of lack in your projects. People reply to provides as time passes limitations or with specific minimal volumes. If you use a shortage strategy however, make sure you follow-through. Your perform repeatedly site visitors will see in the event you said a deal was for a couple of days only and it's continue to up 2 several weeks later.

A high quality affiliate marketing program is going to be ready to help you in lots of ways. They are going to not merely offer good quality goods, however they will educate you on the easiest way to maximize your earnings which maximizes their own. They will be ready to teach you something that you need to know to reach your goals.

If you select your affiliate internet marketing company, you must ensure that the item you end up picking is both common for you and popular. Verify how so many people are searching for the item you wish to advertise. Do an internet based hunt for this product you to ultimately see what sorts of web sites and advertising campaigns already are set up. Make use of a free of charge key phrase device to determine just how many other individuals are performing this kind of research.

An wonderful affiliate internet marketing idea is to generate diverse web pages on your own internet site that address a number of issues. With this particular content material in place, you are able to encourage an online affiliate product or service that's associated with this issue. It is a excellent technique to encourage an online affiliate merchandise in a simple way.

Only market goods you understand are legit or which you would use. In case a client feelings you are doing this just to gain oneself, you may never see them once more, not to mention get a affiliate from them. Customers can easily see right through a unethical referrer and won't return to the web site.

If you check a ad into the internet site it can be simpler to understand. Make the internet site your own personal making it personalized, this could travel visitors and increase income. In Wordpress have very poor penmanship, employ a freelancer to write the advertising campaign.

Many people steer clear of marketing great-ticket things by way of their affiliate internet marketing business because they feel that those items are extremely tough to market. Nonetheless, your sales abilities often enjoy a much more essential part within your good results than the price of this product. Whenever you can write effectively, it is possible to let prospective buyers learn how the product appearance, can feel and seems. You may let them have a sense of what it really would feel like to actually personal the item. Appeal to their senses in innovative and appealing methods. Cause them to feel as if they can't live without the merchandise, for another working day.

Making money being an internet affiliate online marketer will probably demand a large responsibility on your side. Not only will you need to use articles like these to instruct you about advertising, but you will additionally must exercise and perfect your methods. Approach the market with extreme care and use these details to help you as you go along. - Comments: 0

You may possibly want to managing on your own, beloved - 30 Jan 2019 13:15

Tags:

Build a packing checklist for your vacation! Properly in advance, you will need to craft a obvious record of every thing that you are heading to want. This will help you to pack only the points that you genuinely need and it can also make certain that you will not depart just about anything behind.

Buy airport have-on sized toiletries when flying to your up coming vacation spot. Keep them in zip lock bags in your luggage and you won't will need to stress about protection confiscating them.

When choosing a site to vacation to, there is no superior resource of data than a fellow traveler. Other tourists with very similar wants and programs, can tell you what destinations are need to-sees and what areas you ought to try to stay clear of. No guidebook can swap the initial-hand knowledge of yet another individual or spouse and children.

When touring by airplane make guaranteed you take each and every precaution you can to ensure sleek travels. You initially want to make absolutely sure your baggage does not exceed the maximum weight requirements by the airlines. You also want to label all of your luggage so that there is no confusion with other travellers who have equivalent luggage to yours.

Lengthy driving trips can be exciting and inexpensive, but the value of halting for foods each and every couple hrs will add up, primarily for a spouse and children. If you are scheduling a longish motor vehicle journey, make positive you have a lot of car or truck food accessible in progress. You may be capable to get absent with skipping the hourlong lunch halt, which will not only preserve you funds, but will get you to your place sooner. If you have a second adult in the motor vehicle, that person can serve as "lunchmaker," handing close to sandwiches, slicing fruit, and building sure every person receives their midday meal on the highway.

If you are keeping at a lodge that features a mini-bar in your room, consider asking the entrance desk staff members to keep the key rather. This will help you stay clear of late-evening temptations, which presented the selling prices at the minibar can get really pricey. If you really feel the will need for a drink but never want to go significantly, go to the hotel cafe as a substitute.

Before you leave residence, make multiple copies of your journey files. Retailer these in independent bags. It may well also be a superior idea to scan them on to a flash generate, and have it with you. Emailing them to by yourself can be a different process. Make guaranteed you have a number of backups. You do not want to get caught in a overseas nation!

When likely on a cruise, don your place important about your neck, on a lanyard or very similar product. Getting rid of your area important on a cruise ship can price you drastically, not only in funds, but in shed time. Retaining PSD Flyer Templates with you wherever you go can insure that you, and your belongings, will be secure.

As lengthy as you can be flexible with your vacation dates, lookup for flights working with the broadest assortment of dates that you can. This lookup element is element of most vacation websites and accomplishing a broad lookup will allow you to see if there are particular times that are less expensive to fly on than other folks. Using this procedure could preserve you a significant amount of income.

Make your travel programs with out locking your self into progress reserving. Though you can get a excellent offer this way, you are asked to spend in advance for the size of your excursion, and you really don't have the versatility to terminate or adjust the dates of your excursion. Significantly if you know that your strategies could adjust, fork out a very little a lot more and remain at a resort that will enable you alter the dates of your keep up right until a working day in advance of your arrival.

Now, are you thrilled? Ideally, you found a suggestion or two that will make you travel a pleasurable practical experience the upcoming time you go! No doubt, organizing and being prepared will contribute to a productive time. If you are managing yourself, beloved a person, or household member to a pleasurable journey, appreciate the break! If you are traveling for small business, recall to get time to sit back again and take it easy a small also! Have a protected excursion! - Comments: 0

Conduction v. Convection for thermal testing - 30 Jan 2019 05:50

Tags:

By John Booher In Blog, TotalTempComments

What are the trade offs of heat transfer via conduction versus convection in regards to thermal testing?

Heat transfer via conduction is generally faster and more efficient. Depending on your purposes, conduction has a some clear performance advantages and some limitations which we will talk about. In general however, when appropriate conduction is often the best choice for performance.

More to the point, in this discussion, we are talking about trade offs between a temperature chamber and thermal platforms. Temperature chambers are an example of forced convection. Forced convection in a temperature chambers is achieved by the circulation of air using a fan.

Alternatively, natural convection is simply warmer air expanding and becoming less dense, naturally rising creating upward air flow with the colder air sinking to replace the heated air. As a practical note, some chambers have very little forced air flow and thus are limited in convection heat transfer performance. On the other hand increasing airflow excessively can produce unwanted heating by air friction and wasted money and energy spinning large blowers.

For completeness, briefly here, Radiation as the third main method of heat transfer is typically only used for thermal test where conduction or convection are not so practical such as thermal vacuum testing of products with non flat surfaces.

The popular example of comparison between conduction and convection is the pot on the stove.

Courtesy NASA / Machine Design

Mostly radiation transfers heat from the burner to the pan, convection transfers the heat within the water with hotter, less dense water rising and cooler water sinking until temperatures equalize. Conduction in this example will cause your finger to feel the heat and maybe prevent you from picking up the pan.

In the example of a temperature chamber, a fan augments the natural convection flow with a stirring action, greatly increasing heat transfer, to be more precise, this is process is often known as advection. The convective heat transfer in the air of a chamber is far less effective due to the relative density of air compared to water. This shows up as a much lower heat transfer coefficient in heat transfer equations.

For those who think more clearly in terms of equations, here are the simplified comparison of the math behind the heat transfer.

For Conduction: Q = [k ∙ A ∙ (Thot – Tcold)]/d

Conduction is the direct diffusion of heat through a solid material

Q is the amount of heat transferred per unit time

k is the thermal conductivity of the barrier

A is the heat transfer area

T-hot and T-cold are the temperatures of the regions for heat transfer

d is s the thickness of the barrier

With Convection, the Equation looks like this:

Convection being the heat transfer between two items via moving groups of molecules

Q = hc ∙ A ∙ (Ts – Tf)

Where Q is again the amount of heat transferred per time unit

Hc is the convective heat transfer coefficient

A is again the heat transfer area

Ts and Tf are the temperatures of the surface and the temperature of the fluid (air)

These equations describe natural convection heat transfer, not assisted by fan or stirrer. The equations become considerably more complex and generally subject to hueristics and detailed modeling in order to achieve at least moderate accuracy. Variables such as calculating the barrier layers at surfaces, determination of laminar v. turbulent flow and general calculations based on the geometry of the air space fit into the equations. All that boils down to the generality that the more you can stir the air the better the heat transfer – however it will never be as good as conduction. The kitchen example here is that you may be able to keep your hand in a hot oven for a couple seconds without getting burned but a just a few milliseconds of conduction will cause ‘cutaneous damage’ to your finger so with this you can see the relative rate of heat transfer with conduction and convection.

Besides burning your finger, conduction has its issues as well. While the Heat transfer coefficient, hc is the main limiting factor for heat transfer by convection, The area (A) is the main limiting factor for heat transfer by conduction on thermal platforms. Extra care must be taken as well to ensure that the area is really what you think it is(link). Often voids or irregular sufaces limit the area of actual contact.

TotalTemp’s solution to optimal heat transfer is with the intelligent combination both conduction and convection (advection) in our new Hybrid Benchtop Chamber.

Feel free to contact us with any questions concerns or interest in thermal platforms Hybrid benchtop chambers or any thermal testing equipment. We are always available with quality before and after sales support. - Comments: 0

Using Purge Gas When Thermal Testing - 30 Jan 2019 05:45

Tags:

By John Booher In Blog, TotalTempComments

Applying Purge Gas Provides Two Main Benefits When Thermal Testing

INTRODUCTION:

A choice to be considered when selecting the best thermal test system is use of purge gas. Purging with gas serves two purposes during environmental thermal testing. Most often it is used to keep condensation and frost from accumulating on the surfaces of the DUT (Device Under Test) at cold temperatures. Additionally it is also used to prevent oxidation of metals surfaces at high temperatures.

Heavy frost forming at -40C ultimately becomes wet.

High temperature corrosion

Generally the condensation of any moisture is to be avoided during environmental testing of electronics.

Thermal Platform with Probing Cover & Nitrogen(g) Inlet

In simple terms, condensation occurs when the air temperature drops below the dew point. Above the dew point more moisture evaporates from surfaces than condenses, below the dew point more water condenses on surfaces than evaporates. The dew point is a temperature determined by the combined effects of the surface temperature and the relative moisture content of the air (assuming same atmospheric pressure).

Generally condensation is to be avoided during environmental testing of electronics. In simple terms, condensation occurs when the air temperature drops below the dew point. Above the dew point more moisture evaporates from surfaces than condenses, below the dew point more water condenses on surfaces than evaporates. Thus, the farther below the dew point, the faster moisture will condense. The Dew point is a temperature point that is determined by the combined effects of the surface temperature and the relative moisture content of the air (assuming same atmospheric pressure).

The easiest way to avoid condensation on a DUT is to lower the moisture content of the air. The easiest way to do that is with dry Nitrogen purge gas into the space around the DUT. The Nitrogen displaces moisture laden air so that dew point condensation or high temperature oxidation cannot occur. Nitrogen from a Dewar or portable tank works very well because the moisture content of the Nitrogen is extremely low and it is often readily available at the test station. Nitrogen is also notably inert, that is to say it does not easily react with other elements or materials. If you are going to extreme temperatures and condensation can cause problems with your devices, you should take measures such as purge gas to reduce condensation. Critical or sensitive metal surfaces exposed to hot temperatures above 170C will be preserved better with purge gas as well.

Sometimes the question comes up if CO2 (Carbon Dioxide) can be used as a purging gas. The quick answer is no. Although CO2 from a tank is dry and displaces moist air, CO2 can react with water to produce carbonic acid which of course is corrosive. As Thermal Platforms as there is not moisture to begin with, CO2 would work but it is generally not recommended. Other gasses such as Argon can also be used but are generally more expensive. If your facility provides clean dry compressed air, often this can be successfully used to purge, especially if your air is really dry (some facilities add a desiccator system to air supply) and temperatures are not so extreme (~above -20° C as a rule of thumb).

Your requirements may vary but as a starting point in a small benchtop enclosure or chamber 15 – 20 SCFM for an initial flow rate to displace moist air followed by a reduced rate of 3-5 SCFM two to three minutes after openings have been closed. Too much flow on an ongoing basis can create air temperature gradients inside the box.

Consult your application engineer about options to automate these processes. Application of purge gas to a thermal platform or chamber is generally very easy. A pressure regulator can attach right to your Nitrogen tank. The flowmeter is normally located at the tank as well and used to set the flow rate. Typically a small 1/4″ OD uninsulated hose can connect the output of the regulator/flowmeter to the hot cold plate cover or chamber with simple push to connect fittings. - Comments: 0

If a person makes use of the web regularly, they possib - 29 Jan 2019 20:15

Tags:

Don't neglect that social networking is to start with a conversation. Your window for conversation is opened each time a client moves ahead and gives opinions. By motivating connection in between your company plus your customers, you can get far more valuable feedback. Demonstrate to them which you have the ambition to change the negative elements of your enterprise, or push the good factors in to the focus.

You should use sites like Youtube . com to help you give yourself consideration by way of social media marketing. Thousands of people are stored on You tube every single hr of each working day, this may potentially entice huge numbers of people towards you so it's never a negative strategy to advertise on YouTube. When your visitors are presently informed about your products or services it is much more likely that they will buy something, in turn boosting your product sales.

The volume of followers can be a measuring of the good results in social media advertising. Several sizeable organizations with iconic brands can get readers just because men and women like their merchandise. Instagram Likes without the famous brands there the volume of fans your organization has can be a immediate link to how productive your social media is doing.

It will take time and patience to create a social media advertising technique. You will likely not see right away accomplishment. It is possible and contains been completed before, yet it is very less likely that your particular social media marketing profiles goes viral as soon as that you set them up. If you are patient and conscientious, good results may happen.

When publishing video tutorials on YouTube or using social networking, select powerful titles. Placed keywords and phrases associated with your product inside the label. You will definitely get much more sights if customers can rapidly determine your video lessons as valuable, plus your video tutorials will show up when customers key in certain search phrases.

Get a WordPress website to help you use the Wordpress blogs Retweet option. This functions will allow your online visitors to post a web link to each of your content articles with their Youtube give in the straightforward simply click. You might put Retweet buttons in your internet site if you spend some time to code it yourself.

For big businesses, social media marketing can be quite a labor intense, challenging, and non-standardized process in which performance may be elusive. Numerous ad firms and social media marketing companies remain looking to learn how to effectively market on the masses and therefore are making it up as they go. So be cautious that you devote your money and make sure you are getting quantifiable is a result of your marketing plan.

With Fb, it is extremely easy to get supporters of the content material and give them the ability to discuss it. Comments can look on that person's information supply so their buddies see it. In order to make higher publicity, aid readers connections along as well as with each other.

You will not be productive with social websites advertising when you aren't aware of who your potential audience is. You must be aware of why these consumers are utilizing the social networking, what they do there and what sorts of content material they can be seeking.

The volume of followers is actually a way of measuring of your respective success in social media advertising. A lot of large businesses with famous names is certain to get followers simply because folks like their merchandise. Smaller companies without having the famous titles there the amount of followers your organization has can be a direct backlink to how profitable your social media advertising is doing.

A single powerful technique for advertising your small business through social websites sites, for example Flickr or Facebook or myspace, would be to maintain prize draws showcasing pleasing prizes. This kind of announcements are often distributed rapidly on this kind of mass media retailers. Be sure that the challenge is fascinating, clean, and highly relevant to the goods and services you sell. For example, you may consider a emblem-design challenge for any new product you're adding.

If you are using social websites to showcase like Twitter or facebook you should be very careful about any content that you just publish or that is certainly placed in your site. As you are quickly as well as ask instances connected to your client base any minor our maitre snafu can cost product sales.

Social networking might appear to be an intricate concept to comprehend, but once you have set up the basic principles. The others will expand in a natural way. It may be as basic as a picture or varied for an enjoyable online video. The target is always to keep to the earlier mentioned suggestions and find a remedy that matches completely with you and your business. - Comments: 0

page 1 of 13123...1213next »

Unless otherwise stated, the content of this page is licensed under Creative Commons Attribution-ShareAlike 3.0 License