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Factors of Bluetooth Technology to Mitigate Interference with Wi-Fi

Bluetooth wireless technology (BT) operates in the unlicensed Industrial, Scientific, Medical (ISM) band in the 2.4GHz frequency range. It randomly uses 79 1Mhz wide channels ranging from 2.402MHz to 2.480MHz. Each channel is occupied for a maximum time slot of 625us. During this time the radio must change the operating frequency, receive or transmit data, and provide enough off time before switching to the next hop frequency. In reality, the time the radio is actually transmitting on a given channel is much less and is dependent on the amount of data being transmitted. WIFI WiFi or 802.11 b/g, also operates in the same ISM band as BT. Due to complicated modulation techniques, 802.11g channels are 20MHz wide while 802.11b channels are 22MHz wide. This means a common WiFi channel can occupy from 20 to 22 BT channels. COURTESY: HTTP://EN.WIKIPEDIA.ORG/ WIKI/IEEE_802.11B-1999 INTERFERENCE For an RF signal to be received by the radios receiver, the RF signal must contain enough energy to be detected by the receiver circuit. The minimum receive level is known as the receivers sensitivity. This is similar to the lowest whisper that a human ear can detect. What if there happens to be two signals present at the same time and both are greater than the receiver’s sensitivity? Which signal will the radio detect? One would think that it would not be able to correctly detect either signal. That would be true if both signals are close to the same power level. If one signal had a higher power level than the other signal by a specific amount, the radio would be able to detect the more powerful signal. This is similar to a human ear being able to clearly understand members at a dinner table while there are many others talking at tables that are further away. The minimum ratio of power level for two signals when a radio can correctly detect the desired signal is known as the carrier/interferer ratio, or C/I. This means that two RF signals can exist on the same frequency at the same time without causing interference if the ratio of their power levels meet the radios C/I specification.

Science Olympiad Robots
by olin4 0 Comments favorite 6 Viewed Download 0 Times

Okay, so what is a robot? Per definition of en.wikipedia.org, the Holder of All Human Knowledge, a robot is: a mechanical device that can perform physical tasks. A robot may act under the direct control of a human (eg. the robotic arm of the space shuttle) or autonomously under the control of a pre-programmed computer. In the context of Science Olympiad and other small engineering competitions, we are looking at the first type, human control. There are plenty of opportunities to put autonomous features into a Science Olympiad robot, but if you are reading this for content, it is likely beyond your scope and unnecessary. Therefore, for the purposes of this text only, a robot will be defined as: A mechanical device, operated under the direct control of a human, that is engineered to perform a specific task or accomplish a goal. In this case, the goal is to compete in Science Olympiad's Robot Ramble event. And win. More on that later. I'm not smart enough to build a robot! Yes you are. Modern technology has developed to the point at which it permeates our lives. One side effect of this is that it is much easier to learn and try out than in years past. The hobby robotics market is only increasing, and there are a number of companies that specifically make products catered to robots and their builders. Full directions and kits are available to build or program small robots. In some cases, they're even premade, and all you have to do is mess with them. This is often the best way to go about learning.

What Is A Toll Free Number and How Does It Work - FCC

Guía para el Consumidor ¿Qué es un número gratuito y cómo funciona? Antecedentes Los números gratuitos (toll free numbers, en inglés) son números que comienzan con uno de los siguientes códigos de tres dígitos: 800, 888, 877, 866, 855 y 844. Los números gratuitos permiten, a quienes llaman, contactarse con empresas o individuos sin tener que pagar por esas llamadas. El costo del uso de un número gratuito es financiado por la parte que recibe la llamada (el suscriptor del número gratuito) en lugar de la parte que llama. A través de los números gratuitos, es posible efectuar llamadas directamente a su empresa o a su línea directa personal. Los números gratuitos son muy comunes y han probado ser una eficiente herramienta de negocios, particularmente en las áreas de servicios al consumidor y de telemercadeo. El servicio de llamadas gratuitas ofrece a clientes potenciales y a otras partes una vía gratuita y conveniente de contacto con las empresas que cuentan con dicho servicio. Códigos para llamadas gratuitas – 800, 888, 877, 866, 855 y 844 En la actualidad, hay seis códigos de llamadas gratuitas: 800, 888, 877, 866, 855 y 844. Aunque los números 800, 888, 877, 866, 855 y 844 son códigos para llamadas gratuitas, estos no son intercambiables. El 1-800-234-5678 no es lo mismo que el 1-888-234-5678. Las llamadas efectuadas a cada uno de estos números son dirigidas a números telefónicos locales, específicos. ¿Cómo se asignan los números gratuitos? Los números gratuitos son asignados en orden de llegada por entidades conocidas como “Entidades Responsables” (“Responsible Organizations” o “RespOrgs”, en inglés). Estas entidades pueden ser compañías telefónicas, aunque no siempre lo son.

Very old Ricoh camera and lenses to work with newer DSLR ... - Rqna

Asked by SixfootJames on 2012-10-24T11:49:33-04:00 I've been given an old bag of Ricoh camera and lenses and I find that it would be such a waste not to be able to use in some way all this again for something. Can you give me some suggestions as to how to use this kind of equipment with a newer camera like a Canon 600D? Archives Arts Questions and Answers Photography Questions and Answers Oct 24th, 2012 Archives Week 43, 2012 Archives October, 2012 Archives Tags Lens Dslr Old Lenses Best Answer Answered by John Cavan on 2012-10-24T23:11:20-04:00 Ricoh, historically, used the Pentax K-mount for their film SLR cameras, but with a slight and important modification: they added a pin that's used to indicate the aperture is in auto mode for shutter priority use. With some careful work, you can http://forums.dpreview.com/forums/post/25959708 for use on K-mount bodies made by Pentax or Samsung or with a http://rads.stackoverflow.com/amzn/click/B003Y3EJMU for Canon EOS digital and film variants. Nevertheless, if you have Ricoh K-mount lenses, that pin has to go. You can confirm if you have these based on this helpful bit of info from Wikipedia: The R-K mount is used on Rikenon P lenses, Ricoh bodies that include the letter 'P' in their model number, and some non-Ricoh lenses. Now, it's also possible that the Ricoh lenses are M42 screw-mount lenses also known, funny enough, as the Pentax mount when most film cameras had it and Pentax was the SLR king. If that is the case, and it's easy to tell by just looking for threads on the lens mount, then you can easily get...

Como escribir una excelente carta de presentación

¿Tienes un curriculum impresionante? ¿Sabes cómo presentarte muy bien en las entrevistas? ¿Sabes para qué clase de puesto estás hecho? Ahora todo lo que necesitas es una oportunidad para que “camines” hacia la puerta correcta. Sólo piensa, ¿qué podrías hacer para que esto suceda? Asegúrate de escribir una carta de presentación que tenga impacto. Es tu oportunidad de hacerle ver a tus empleadores por qué deberían considerarte para el puesto. Tu carta de presentación es una herramienta de ventas que debería estar dirigida al puesto específico que estás buscando. También es una oportunidad de mostrar a los potenciales empleadores tus habilidades de redacción. Si es el caso de que estás enviando una carta de presentación en otro idioma distinto de tu lengua nativa, es una excelente oportunidad de demostrar que puedes expresarte con fluidez. Sin importar cuál sea el nivel de tus habilidades en el idioma y tu capacidad de redacción, asegúrate de que tu carta no contenga errores. Reléela varias veces. Una carta de presentación, como la mayoría de la correspondencia de negocios, tiene tres partes...

The Horde 4 PHP framework
by hirax 0 Comments favorite 28 Viewed Download 0 Times

The Horde 4 PHP framework. Gunnar Wrobel wrobel@horde.org. May, 13th 2011 . Gunnar Wrobel (wrobel@horde.org). Horde 4. May, 13th 2011. 1 / 44 ... The Horde 4 PHP framework Gunnar Wrobel wrobel@horde.org May, 13th 2011 Gunnar Wrobel (wrobel@horde.org) Horde 4 May, 13th 2011 1 / 44 Components Components = Modules = Libraries = Packages = ... Photo: Rudolf Ammann [http://www.flickr.com/photos/rka/1415516/] Gunnar Wrobel (wrobel@horde.org) Horde 4 May, 13th 2011 2 / 44 The Horde 4 PHP framework There are more than 90 components available from http://pear.horde.org. Photo: Aaron Merrifield [http://www.flickr.com/photos/spammt/4823025103/] Gunnar Wrobel (wrobel@horde.org) Horde 4 May, 13th 2011 3 / 44 Groupware Photo: Denise Chan [http://www.flickr.com/photos/denn/5005046/] Gunnar Wrobel (wrobel@horde.org) Horde 4 May, 13th 2011 4 / 44 Groupware Definition “[...] groupware [...] is computer software designed to help people involved in a common task achieve their goals [...].”a a http://en.wikipedia.org/wiki/Groupware Remote It is usually associated with team members not physically co-located. Asynchronous Communication between team members is primarily asynchronous. Gunnar Wrobel (wrobel@horde.org) Horde 4 May, 13th 2011 5 / 44

Analyzing Design Tradeoffs in Large-scale Socio ... - Christoph Dorn

Emerging online collaboration platforms such as Wikipedia, Twitter, or Facebook provide the foundation for socio-technical systems where humans have become both content consumer and provider. Existing software engineering tools and techniques support the system engineer in designing and assessing the technical infrastructure. Little research, however, addresses the engineer’s need for understanding the overall socio-technical system behavior. The effect of fundamental design decisions becomes quickly unpredictable as multiple collaboration patterns become integrated into a single system. We propose the simulation of human and software elements at the collaboration level. We aim for detecting and evaluating undesirable system behavior such as users experiencing repeated update conflicts or software components becoming overloaded. To this end, this paper contributes (i) a language and (ii) methodology for specifying and simulating large-scale collaboration structures, (iii) example individual and aggregated pattern simulations, and (iv) evaluation of the overall approach. Keywords: Design Tools and Techniques, System Simulation, Collaboration Patterns, Large-scale Socio-Technical Systems

municipalidad de linares listado números telefónicos - ilustre ...

MUNICIPALIDAD DE LINARES LISTADO NÚMEROS TELEFÓNICOS DIRECCION SERVICIOS GENERALES ALCALDÍA Secretaria Alcaldía 634520 Secretaria Administrador Secretaria Dirección Secretaria 634523 633423 633426 634522 Secr. De Concejo 633422 Movilización Mantención 634520 SECRETARIA MUNICIPAL Secr. Org. C. Oficina de Partes Empastes CENTRAL TELEFONICA Fax 634521 534537-538 634397 634224-513 634514 633418 DEPARTAMENTO COMUNAL EDUCACION Secretaria Dirección Finanzas Finanzas Remuneraciones Extraescolar Secr. Extraescolar SECPLAN Secretaria 633629 Monit. Extraescolar 633628 Personal 633636 Jefe U. T. P 633637 Adquisiciones 633638 Informática 633639 Inventario 633646 Comunicaciones 633647 Computación 633692 Coord. Ed. B y Media 633648 Central Telefónica Jefe Cont. y Ptto 634539 634541 Taller Maestros Bodega Contabilidad y Ptto. 634543-544 Psicóloga Informática 634535-536 Jorge Bascuñan Jefe de Rentas Atención Público Tesorero 634580 634581-582 Evelyn Villar Secr. Asist. Social 634584 Of. de Partes Secretaría 634583 Fax- Central Atención de Público 634574 Estadística Fax Tesorería 634575 Equipam. Escolar Inspectores 633249 633237 633246 633263 633258 633255 633257 633259 633252 633238 633262 633264 633247 633248 633253 633266 Comedores DIRECCION ADM. Y FINANZAS Secretaria 633427 Aseo y Ornato ADMINISTRACION 633457-458 633279 633348 633349 633354 633355 633359 633365 633366 633368 633364 633367 Liceos- Colegios Recintos Dep. 634488 Instituto Comercial 633385-286 Secretaría 634487 Liceo Ireneo Badilla 633293-294 Estadio Municipal 634586 Liceo Val. Letelier 633267-268 Piscina Municipal 634587

1-800-4-DEWALT • www.dewalt.com - Northern Tool + Equipment

If you have questions or comments, contact us. Pour toute question ou tout commentaire, nous contacter. Si tiene dudas o comentarios, contáctenos. 1-800-4-DEWALT • www.dewalt.com INSTRUCTION MANUAL GUIDE D'UTILISATION MANUAL DE INSTRUCCIONES INSTRUCTIVO DE OPERACIÓN, CENTROS DE SERVICIO Y PÓLIZA DE GARANTÍA. ADVERTENCIA: LÉASE ESTE INSTRUCTIVO ANTES DE USAR EL PRODUCTO. D28110, D28112, D28402, D28402N Heavy-Duty Small Angle Grinder Petites meuleuses angulaires de service intensif Esmeriladoras angulares pequeñas para trabajo pesado English IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT THIS OR ANY DEWALT TOOL, CALL US TOLL FREE AT: 1-800-4-DEWALT (1-800-433-9258) General Safety Rules – For All Tools • WARNING! Read and understand all instructions. Failure to follow all instructions listed below may result in electric shock, fire and/or serious personal injury. • SAVE THESE INSTRUCTIONS • WORK AREA • Keep your work area clean and well lit. Cluttered benches and dark areas invite accidents. • Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust. Power tools create sparks which may ignite the dust or fumes. • Keep bystanders, children, and visitors away while operating a power tool. Distractions can cause you to lose control. • ELECTRICAL SAFETY • Grounded tools must be plugged into an outlet properly installed and grounded in accordance with all codes and ordinances. Never remove the grounding prong or modify the plug in any way. Do not use any adaptor plugs. Check with a qualified electrician if you are in doubt as to whether the outlet is properly grounded. If the tools should electrically malfunction or break down, grounding provides a low resistance path to carry electricity away from the user. Applicable only to Class I (grounded) tools. • Double insulated tools are equipped with a polarized plug (one blade is wider than the other.) This plug will fit in a polarized outlet only one way. If the plug does not fit fully in the outlet, reverse the plug. If it still does not fit, contact a qualified electrician to install a polarized outlet. Do not change the plug in any way. Double insulation eliminates 1 the need for the three wire grounded power cord and grounded power supply system. Applicable only to Class II (double insulated) tools. Avoid body contact with grounded surfaces such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is grounded. Don’t expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock. Do not abuse the cord. Never use the cord to carry the tools or pull the plug from an outlet. Keep cord away from heat, oil, sharp edges or moving parts. Replace damaged cords immediately. Damaged cords increase the risk of electric shock. When operating a power tool outside, use an outdoor extension cord marked “W-A” or “W.” These cords are rated for outdoor use and reduce the risk of electric shock. When using an extension cord, be sure to use one heavy enough to carry the current your product will draw. An undersized cord will cause a drop in line voltage resulting in loss of power and overheating. The following table shows the correct size to use depending on cord length and nameplate ampere rating. If in doubt, use the next heavier gage. The smaller the gage number, the heavier the cord. Minimum Gage for Cord Sets Volts Total Length of Cord in Feet ...

Informe partición de herencia Ferran Abogados & Asociados www ...

ESTIPULACIONES Y FUNDAMENTACIÓN JURÍDICA: I. Que su padre y pareja, respectivamente, don CAUSANTE, con DNI-NIF: IIIII-B, falleció en Valencia, de donde era vecino, el día diez de agosto de 2011. Al momento de su muerte se hallaba viudo de doña CINCO, fallecida el 1 junio de 1991, de cuyo matrimonio tiene tres hijos, llamados UNO, DOS y TRES. II. Don CAUSANTE falleció bajo testamento autorizado por el notario de Valencia, Don José Manuel XXXX, el día 19 de octubre de dos mil siete, número de protocolo YYYY, en el cual: “Lega a DOÑA CUATRO, todas las cantidades de las que sea titular el testador en cuentas corrientes, plazos fijos, acciones, fondos y demás activos muebles. En el resto de su haber hereditario instituye herederos, por partes iguales entre ellos, a sus citados hijos UNO, DOS Y TRES, sustituidos vulgarmente, en caso de premoriencia, por sus respectivos descendientes por estirpes, habiendo, en defecto de descendientes, derecho de acrecer entre los coherederos”. III. Los únicos BIENES RELICTOS AL FALLECIMIENTO DEL CAUSANTE, son las cuentas corrientes siguientes: 1. CINCUENTA Y TRES MIL EUROS (53.000 €) depositados en el número de cuenta de la entidad Banco de Valencia. 2. MIL NOVECIENTOS OCHENTA Y DOS EUROS CON CUARENTA Y SEIS CÉNTIMOS (1.982,46 €) depositados en el número de cuenta de la entidad Banco de Valencia Ferran Abogados & Asociados 1 Informe partición de herencia Ferran Abogados & Asociados www.ferranabogados.com

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