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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Analysis on the Feasibility of Applying the Broadband Network to Development of Digital Focused Media¡G The ¡§WeMET Media" of WeMET Wireless Broadband

keng, Yi-shun 13 August 2008 (has links)
Abstract This research is based on the WeMET Wireless Broadband Corp., the greatest wireless broadband provider in Kaohusiung. We integrate business resource of WeMET, industrial background in Kaohsiung, channel advantage about ISP, and dynamic feature from IP, then creating new ads media with digital narrowcasting media service by using wireless broadband network. Depending on the business plan with highly narrowcasting ads service, we can establish the market segment against the tradition ads channel, and go deep into the economical recovering market in Kaohsiung. This research gathers many references about broadband network, ISP, outdoor and narrowcasting media, as well as economical development in Kaohsiung. The research also investigates and interviews ads provider, store keeper and customer. By using such data, we can create the business plan due to this research, and analyze the advantage and development strategy depending on the ads service. In order to prove the availability of this plan, we evaluate the financial performance and make the sensitivity analysis in conclusion. Based on the empirical result, comparing to traditional outdoor ads, the advantage of this business plan is , and reduce the channel cost about setting up ads equipment. Besides, not only the characteristic of narrowcasting media can save media resource, but also increase the matching efficiency, and create the long tail effect, which reduce ads quantity and raise ads quality.
22

Ressourcensteuerung fuer Internet-Zugaenge

Naumann, Torsten 09 October 1997 (has links) (PDF)
Mehr und mehr werden neue und dabei zunehmend multimediale Anwendungen fuer das Internet entwickelt und eingesetzt. In gleichem Masze wachsen auch die Qualitaetsanforderungen an diese Dienste. So gibt sich heute niemand mehr mit reiner ASCII--Text--Uebertragung von Informationen zufrieden. E-Mails werden mit MIME--Attachments versendet, Web--Seiten mit unzaehligen Grafiken ansehnlicher gemacht, und Konferenzen in Datennetzen erheben den Anspruch auf Audio-- und Video--Uebertragung in Echtzeit. Fuer Provider stellt sich hier nun das Problem der Finanzierung. Gegenstand dieser Arbeit ist es, anhand des Szenarios des Internet--Service--Providers ¨Freie Presse Online¨ ein Tarifmodell zu entwickeln, welches mittels Ressourcensteuerung arbeitet. Es soll ein Anreizsystem etabliert werden, um eine effizientere Ausnutzung der Ressourcen zu erzielen. Die finanzielle Grundlage bildet Prepayment. Die Einflusznahme geschieht nicht mittels veraenderlicher Entgelte, sondern direkt auf die dem Nutzer zur Verfuegung gestellten Ressourcen (Bandbreite, Verzoegerungszeit). Fuer den Entwurf des Modells werden Anleihen bei artverwandten Modellen genommen, so zum Beispiel bei der Tarifierung von elektrischer Energie, da die beiden Ressourcen Bandbreite (in Datennetzen) und Energie (in Stromnetzen) markante Aehnlichkeiten aufweisen. Weiterhin wird eine Analyse des Verhaltens der Nutzer im Bezug auf die Dauer und Tageszeit der Nutzung, Datenvolumen und Lastkurven durchgefuehrt. Die Analyse und das Accounting werden mittels der von der Real Time Flow Measurement Group vorgeschlagenen Architektur realisiert. Konkret kommt die Referenz-- Implementation NeTraMet zum Einsatz.
23

Handelshinder som policy. Exportkontrollens effektivitet och påverkan på Sveriges handel med krigsmateriel 1984-2010 kopplat till policyutveckling. / Restriction to Trade as Policy. Effect and Impact of Trade Barriers on Swedish Arms Exports 1984-2010 connected to Policy Development.

Fjellman, Jonas January 2015 (has links)
The purpose of this thesis is to analyze the regulatory power, efficiency and impact of export control on Swedish arms export from the 1980s onwards, linked to the delegation of authority of permit license to the Inspectorate of Strategic Products in 1997. An increase in the administrative sector, based on a collective decision making process and established criteria and guidelines, aimed to strengthen the control of arms export to non-democratic and problematic states. In short, the aim of the study is to investigate and analyze whether there was a decrease in the arms export to problematic states or not. On one hand, it is reasonable to assume that the introduction of the new regulation entailed a more strict arms export policy. However, previous research has showed that regulations are sometimes not effective since incentives to breach these may be present. The study begins by examining the Swedish case and situation in terms of arms manufacturing and export, as well as the delegation of authority and legislation applied to the field over time. The general conclusion is that the legislature regulations and guidelines are vague in their design, as well as outdated, accompanied by the fact that new concepts, terms and classifications are introduced. The statistics are then approached by way of the analysis of the volume and composition of the trade and of the number and shares of problematic export in relation, based on the classifications of recipients regarding political freedoms and democratic rights. Finally, a correlation analysis is conducted and shares of problematic export is compared with the total arms export over time in order to interpret development. The results indicate that the delegation of authority regarding permit licensing to the Inspectorate of Strategic Products has not led to a decrease in the numbers of disputed shares. What is more, the study demonstrates that the delegation has led to a decrease in the responsibility concerning the arms export authority that can be correlated to the continuous high levels of disputed export, which might be approved. The existence of generic guidelines that are open to interpretation combined with an outdated set of legislature, plays a large role in this.
24

SIMULATIONS-GUIDED DESIGN OF PROCESS ANALYTICAL SENSOR USING MOLECULAR FACTOR COMPUTING

Dai, Bin 01 January 2007 (has links)
Many areas of science now generate huge volumes of data that present visualization, modeling, and interpretation challenges. Methods for effectively representing the original data in a reduced coordinate space are therefore receiving much attention. The purpose of this research is to test the hypothesis that molecular computing of vectors for transformation matrices enables spectra to be represented in any arbitrary coordinate system. New coordinate systems are selected to reduce the dimensionality of the spectral hyperspace and simplify the mechanical/electrical/computational construction of a spectrometer. A novel integrated sensing and processing system, termed Molecular Factor Computing (MFC) based near infrared (NIR) spectrometer, is proposed in this dissertation. In an MFC -based NIR spectrometer, spectral features are encoded by the transmission spectrum of MFC filters which effectively compute the calibration function or the discriminant functions by weighing the signals received from a broad wavelength band. Compared with the conventional spectrometers, the novel NIR analyzer proposed in this work is orders of magnitude faster and more rugged than traditional spectroscopy instruments without sacrificing the accuracy that makes it an ideal analytical tool for process analysis. Two different MFC filter-generating algorithms are developed and tested for searching a near-infrared spectral library to select molecular filters for MFC-based spectroscopy. One using genetic algorithms coupled with predictive modeling methods to select MFC filters from a spectral library for quantitative prediction is firstly described. The second filter-generating algorithm designed to select MFC filters for qualitative classification purpose is then presented. The concept of molecular factor computing (MFC)-based predictive spectroscopy is demonstrated with quantitative analysis of ethanol-in-water mixtures in a MFC-based prototype instrument.
25

Diseño e Implementación de un Curso y un Laboratorio de Servicios Sobre Acceso LTE y Packet Core IMS

Oliva Cuevas, John January 2012 (has links)
El dinámico desarrollo de las Telecomunicaciones Móviles, la convergencia de las tecnologías y arquitecturas de Telecomunicaciones fija – móvil, la masificación de los terminales inteligentes, la creciente demanda de mayor ancho de banda hacia aplicaciones computacionales en la nube y la necesidad de interacción en línea con el menor retardo posible impulsan el ecosistema de las redes de próxima generación. Este ecosistema ya es realidad y plantea desafíos de estudio, actualización y capacitación a los profesionales que trabajan en los Operadores de Telecomunicaciones, Proveedores de Servicios de Valor Agregado y también a los futuros egresados de Ingeniería Civil Electricista de la Universidad de Chile. El presente trabajo de título, tiene como motivación satisfacer la necesidad de capacitación existente enfocando el contenido del curso y del laboratorio a las tres tecnologías convergentes por excelencia: la primera; Acceso LTE (Long Term Evolution) que corresponde a la “Evolución a Largo Plazo” de las Redes Móviles en su camino a la cuarta generación, la segunda; Packet Core IMS (IP Multimedia Subsystem) que corresponde a la plataforma habilitadora de servicios basados en Paquetes IP y la tercera; ISP (Internet Service Provider) que corresponde a la red que brinda acceso a la red global de servicios IP que es Internet. El objetivo general del trabajo de título es el desarrollo de material docente para realizar un curso teórico y un laboratorio con experiencias prácticas de LTE, IMS e ISP. Para lograr el objetivo planteado, se utiliza la metodología docente empleada en el diseño y la construcción de cursos universitarios, que consiste en estructurar un plan de estudios, compuesto por unidades programáticas, las que a su vez están compuestas por módulos de instrucción. El conjunto de componentes de la metodología docente permite implementar un curso y someterlo a un proceso de mejora continua. El resultado del trabajo es un curso teórico compuesto por cinco capítulos y un laboratorio compuesto por cinco experiencias prácticas. Cada unidad programática materializa sus contenidos teóricos en presentaciones y sus contenidos prácticos en guías de experiencias. Además se realiza una propuesta de tareas y evaluaciones acumulativas. Las unidades programáticas resultantes son tres: LTE, IMS e ISP y el curso termina con la aplicación de un examen final. La experiencia práctica LTE fue validada en demostraciones y pruebas realizadas a los Operadores Nacionales VTR y Entel, en conjunto con la empresa ZTE. Dada la gran extensión y cobertura del curso teórico, este fue parcialmente validado en presentaciones al Operador VTR y además en presentaciones internas a los profesores guía y co-guía. La memoria de título plantea una propuesta innovadora para un curso electivo del DIE de la Universidad de Chile, tiene valor agregado para los Operadores de Telecomunicaciones y proyecciones en el plano investigativo, pues la habilitación del laboratorio LTE constituye una excelente plataforma para nuevos trabajos y validaciones de modelos teóricos.
26

Extrato de proteínas estruturadoras de gelo obtido de folhas de trigo na crioproteção de Saccharomyces cerevisiae / Extract ice structuring proteins obtained from wheat leaves in the cryoprotection of Saccharomyces cerevisiae

Ramos, Michelle Silva 01 December 2017 (has links)
Submitted by Reginaldo Soares de Freitas (reginaldo.freitas@ufv.br) on 2018-03-14T12:34:21Z No. of bitstreams: 1 texto completo.pdf: 2002540 bytes, checksum: f255112a6c8a31d55bad368155bc1f3f (MD5) / Made available in DSpace on 2018-03-14T12:34:21Z (GMT). No. of bitstreams: 1 texto completo.pdf: 2002540 bytes, checksum: f255112a6c8a31d55bad368155bc1f3f (MD5) Previous issue date: 2017-12-01 / Fundação de Amparo à Pesquisa do Estado de Minas Gerais / O fermento biológico é o elemento responsável pela fermentação dos açúcares presentes na massa de pão produzindo etanol, produtos secundários responsáveis pelo desenvolvimento do aroma e sabor e dióxido de carbono, indispensável para conferir volume aos pães. Durante o congelamento de massas, podem ocorrer diversas alterações fisiológicas que comprometem o metabolismo das leveduras e, consequentemente, a sua atuação como ingrediente, afetando consideravelmente a qualidade dos pães. Proteínas estruturadoras de gelo (ISP) são substâncias obtidas a partir de fontes naturais e apresentam grande potencial na manutenção da qualidade de alimentos congelados. O principal objetivo deste estudo foi investigar o efeito crioprotetor do extrato de ISP obtido a partir de folhas de trigo da variedade BRS Guabiju durante o congelamento da levedura Saccharomyces cerevisiae. Extratos de ISP foram obtidos após 25 dias de aclimatação e a existência de ISP no extrato foi confirmada por eletroforese (SDS-PAGE) pela presença de duas bandas proteicas, uma de 20,1 kDa e outra na faixa de 20,1 kDa - 30,0 kDa. Diferentes concentrações do extrato de ISP (0 μg, 4 μg, 6 μg, 8 μg e 12 μg de proteína .100 mL -1 de meio de cultura YPG) foram utilizados para avaliar o efeito crioprotetor de leveduras isoladas de fermento biológico fresco e seco instantâneo congeladas a - 25° C durante 0, 10, 20, 30 e 40 dias. A concentração de 8 μg de proteína .100 mL -1 de meio de cultura YPG foi a que apresentou melhor crioproteção (P<0,05) na manutenção da sobrevivência das leveduras, durante o tempo de estocagem. Considerando estes resultados, a concentração de 8 μg de proteína foi incorporada em massas de pão francês (8 μg de proteína .100 g -1 massa). As massas foram congeladas a – 25 oC durante durante 0, 10, 20, 30 e 40 dias e a viabilidade, capacidade fermentativa do fermento biológico e o volume das massas foram avaliados. As ISP apresentaram propriedades crioprotetoras para o fermento biológico (P<0,05) apresentando menor redução de células durante o tempo de congelamento comparado ao controle, embora ambas tenham produzido quantidade similar de CO 2 , houve um declínio progressivo da produção de CO 2 de ambos os tratamentos em função do tempo de armazenamento da massa. A concentração de 8 μg de proteína. 100 g -1 massa exerceu crioproteção às leveduras durante o tempo de armazenamento das massas (P<0,05). Com base em estudos anteriores, acredita-se que este resultado também esteja associado ao efeito crioprotetor do extrato de ISP na estrutura da rede de glúten. Concluiu-se que o extrato de ISP da variedade de trigo BRS Guabiju exerceu atividade crioprotetora no fermento biológico sugerindo a possibilidade de utilização comercial dessas proteínas em massas de pão congeladas. / The yeast is the element responsible for the fermentation of the sugars present in the bread dough producing ethanol, secondary products responsible for the development of aroma and flavor and carbon dioxide, indispensable to give volume to the bread. During the freezing of dough, several physiological changes can occur that compromise the metabolism of the yeasts and, consequently, their action as an ingredient, affecting considerably the quality of the breads. Ice structuring proteins (ISP) are substances obtained from natural sources and have great potential in maintaining the quality of frozen foods. The main objective of this study was to investigate the cryoprotective effect of the ISP extract obtained from wheat leaves of the BRS Guabiju variety during the freezing of yeast Saccharomyces cerevisiae. ISP extracts were obtained after 25 days of acclimation and the existence of ISP in the extract was confirmed by electrophoresis (SDS-PAGE) by the presence of two protein bands, one of 20,1 kDa and another in the range of 20,1 kDa-30,0 kDa. Different concentrations of the ISP extract (0 μg, 4 μg, 6 μg, 8 μg and 12 μg of protein. 100 mL -1 of YPG culture medium) were used to evaluate the cryoprotectant effect of yeasts isolated from fresh and dry yeast frozen at -25 ° C for 0, 10, 20, 30 and 40 days. The concentration of 8 μg of protein. 100 mL -1 of YPG culture medium was the one that presented better cryoprotection (P<0,05) in maintaining yeast survival during storage time. Considering these results, the concentration of 8 μg of protein was incorporated into French bread doughs (8 μg of protein .100 g -1 dough). The dough was frozen at -25 ° C for 0, 10, 20, 30 and 40 days and the viability, fermentative capacity of the yeast and the volume of the dough were evaluated. The ISP presented cryoprotectant properties for the yeast (P<0,05), presenting lower cell reduction during the freezing time compared to the control, although both produced similar amount of CO 2 , there was a progressive decline in CO 2 production of both treatments as a function of storage time of the dough. The concentration of 8 μg protein. 100 g -1 dough exerted cryoprotection to the yeasts during the time of dough storage (P<0,05). Based on previous studies, it is believed that this result is also associated with the cryoprotective effect of the ISP extract on the structure of the gluten network. It was concluded that the ISP extract of wheat variety BRS Guabiju exercised cryoprotective activity in yeast suggesting the possibility of commercial use of such proteins in frozen doughs.
27

Evaluación Económica para Servicios ISP de Carácter Regional

Hurtado del Nido, Andrés Felipe January 2010 (has links)
Al analizar el comportamiento de un usuario promedio de Internet en Chile, se observa el uso de diversos servicios tales como visualización de páginas Web, correo, videos en línea, juegos, etc. Sin embargo, estos contenidos se encuentran alojados principalmente en servidores de EEUU y Europa. Esta distribución de la información tiene un costo a considerar, por cuanto cada byte transmitido entre quien hospeda los contenidos y el usuario final debe hacer uso de una extensa red, la cual posibilite la conexión entre estos actores. Así, al considerar el sostenido crecimiento en la penetración nacional de Internet, junto con las constantes alzas de las tasas de transferencia en los servicios ofrecidos, el pago por el uso de las redes internacionales se vuelve cada vez más gravitante, convirtiéndose en una componente influyente en la estructura de costos de los ISP’s y, en definitiva, de los usuarios. Sin embargo, este no es sólo un problema económico, pues a mayor lejanía entre los contenidos y su suscriptor, este verá más deteriorada la calidad del servicio entregado. Al buscar una solución a esta problemática, es posible generar un conjunto de alternativas, todas ellas enmarcadas en “Redes de contenidos distribuidos”, las que, entre otros beneficios, generan una optimización en el uso de los enlaces internacionales. El modelo planteado, propone el traslado de contenidos desde los hosts originales que prestan los servicios, a otros nacionales o regionales. Se genera así, una primera mirada a los aspectos técnicos y económicos involucrados en dicha propuesta, basados en una “fotografía” realizada al mercado chileno, su evolución en los pasados años y su proyección en un mediano plazo. Luego, se analizan de modo general, tanto las componentes técnicas como económicas involucradas, donde se esclarece si un proyecto bajo estas características generará ahorros reales para los ISP nacionales y, en consecuencia, para los usuarios. Un resultado importante muestra que la implementación de este tipo de redes, se justifica no sólo por los ahorros generados, sino también por la limitada capacidad de los enlaces internacionales existentes. Se genera así, no sólo un uso más eficiente del ancho de banda internacional, sino que también una mejor experiencia para los usuarios, disminuyendo los tiempos de despliegue de las páginas y servicios Web, así como en los servicios de descarga de archivos. La implementación de un proyecto de estas características, requerirá el esfuerzo de un conglomerado de compañías junto a entes gubernamentales, con tal de establecer confianzas en los generadores de contenidos, lo cual permita el traslado de los contenidos y servicios a servidores regionales. Un trabajo futuro debe considerar las condiciones necesarias a desarrollar para la instalación de la solución, así como un estudio acabado sobre el tráfico cursado por los internautas nacionales en diversos niveles.
28

"Notice and Take Down", o některých aspektech odpovědnosti poskytovatelů služeb / Notice and Take Down, on Certain Aspects of Liability of Online Intermediaries

Elbert, Tomáš January 2011 (has links)
5 Abstract The final thesis addresses certain aspects of current topic of online intermediaries' liability for user-generated content ("UGC"). Under Act No. 480/2004 Coll., on certain information society services ("2004 Act on ISS"), which transposes e- Commerce Directive 2000/31/EC, online intermediaries in the Czech Republic benefit from "safe harbours". Essentially, it means that online intermediaries can be held liable for UGC only if they had actual or constructive knowledge of illegality of the content. This rule implicitly creates the so called "Notice and Take Down" procedure ("NTD"). Online intermediary upon receiving a notice, and thereby learning about the illegality of the content, is obliged to expeditiously take down the illegal content in order to preserve his immunity. However, NTD is neither expressly regulated within the ECD nor within the 2004 Act on ISS. Therefore, the purpose of the thesis is to illuminate NTD procedure and provide guidelines for it successful application within the Czech Republic. The thesis should be helpful not only to online intermediaries, but also to aggrieved parties serving notices. For this purpose the thesis looks not only at the ECD and its transpositions in various Member States, but also at American Digital Millennium Copyright Act 1998 that has been the...
29

Zvýšení bezpečnosti nasazením SIEM systému v prostředí malého poskytovatele internetu / Security Enhancement Deploying SIEM in a Small ISP Environment

Bělousov, Petr January 2019 (has links)
Diplomová práce se zaměřuje na zvýšení bezpečnosti v prostředí malého poskytovatele internetu nasazením SIEM systému. Dostupné systémy jsou porovnány a zhodnoceny v souladu s požadavky zadávající firmy. Projekt nasazení systému SIEM je navržen, implementován a zhodnocen v souladu s unikátním prostředím firmy.
30

Průmyslový programátor mikrokontrolérů AVR Atmel / Industrial programmer Atmel AVR microcontrollers

Gryžboň, Jan January 2014 (has links)
The aim of this thesis is to design and implement an industrial programmer AVR microcontrollers from Atmel. The first section provides the theoretical knowledge of the AVR microcontroller. Furthermore, comparison of methods for programming the microcontroller and the selected method is an analysis of the speed of programming. The following is the entire design of industrial programmer which is implemented in the programming environment Eagle. In the penultimate part of the proposal is designed PCB. The final section is devoted to the revival of the programmer and programming.

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