979 resultados para 320.53


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Dark brown sediment with small to large sized clasts. The clasts are sub-angular to sub-rounded in shape. Lineations are the most abundant. Minor amounts of rotation structures and comet structures can also be seen. Grain crushing is also present throughout the sample.

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Tesis (Maestría en Ciencias con Especialidad en Biología Molecular e Ingeniería Genética) UANL, 2012.

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Mémoire numérisé par la Division de la gestion de documents et des archives de l'Université de Montréal

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Mémoire numérisé par la Division de la gestion de documents et des archives de l'Université de Montréal

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Extensive use of the Internet coupled with the marvelous growth in e-commerce and m-commerce has created a huge demand for information security. The Secure Socket Layer (SSL) protocol is the most widely used security protocol in the Internet which meets this demand. It provides protection against eaves droppings, tampering and forgery. The cryptographic algorithms RC4 and HMAC have been in use for achieving security services like confidentiality and authentication in the SSL. But recent attacks against RC4 and HMAC have raised questions in the confidence on these algorithms. Hence two novel cryptographic algorithms MAJE4 and MACJER-320 have been proposed as substitutes for them. The focus of this work is to demonstrate the performance of these new algorithms and suggest them as dependable alternatives to satisfy the need of security services in SSL. The performance evaluation has been done by using practical implementation method.

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The magnetic properties of BaFe12O19 and BaFe10.2Sn0.74Co0.66O19 single crystals have been investigated in the temperature range (1.8 to 320 K) with a varying field from -5 to +5 T applied parallel and perpendicular to the c axis. Low-temperature magnetic relaxation, which is ascribed to the domain-wall motion, was performed between 1.8 and 15 K. The relaxation of magnetization exhibits a linear dependence on logarithmic time. The magnetic viscosity extracted from the relaxation data, decreases linearly as temperature goes down, which may correspond to the thermal depinning of domain walls. Below 2.5 K, the viscosity begins to deviate from the linear dependence on temperature, tending to be temperature independent. The near temperature independence of viscosity suggests the existence of quantum tunneling of antiferromagnetic domain wall in this temperature range.

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Extensive use of the Internet coupled with the marvelous growth in e-commerce and m-commerce has created a huge demand for information security. The Secure Socket Layer (SSL) protocol is the most widely used security protocol in the Internet which meets this demand. It provides protection against eaves droppings, tampering and forgery. The cryptographic algorithms RC4 and HMAC have been in use for achieving security services like confidentiality and authentication in the SSL. But recent attacks against RC4 and HMAC have raised questions in the confidence on these algorithms. Hence two novel cryptographic algorithms MAJE4 and MACJER-320 have been proposed as substitutes for them. The focus of this work is to demonstrate the performance of these new algorithms and suggest them as dependable alternatives to satisfy the need of security services in SSL. The performance evaluation has been done by using practical implementation method.

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This paper describes JERIM-320, a new 320-bit hash function used for ensuring message integrity and details a comparison with popular hash functions of similar design. JERIM-320 and FORK -256 operate on four parallel lines of message processing while RIPEMD-320 operates on two parallel lines. Popular hash functions like MD5 and SHA-1 use serial successive iteration for designing compression functions and hence are less secure. The parallel branches help JERIM-320 to achieve higher level of security using multiple iterations and processing on the message blocks. The focus of this work is to prove the ability of JERIM 320 in ensuring the integrity of messages to a higher degree to suit the fast growing internet applications

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In diesem working paper werden die Bedeutung und Wirkung der Fördermaßnahmen des Sozialfonds FONVIS und der venezolanischen Reformpolitik beschrieben und die Dynamik des aktuellen Regimewandels Venezuelas erstmals konkret in einer empirischen Studie der lokalen Ebene untersucht. Dazu wurden in einer eigenständigen Erhebung über zahlreiche Tiefeninterviews lokale Basisprojekte, die die Verbesserung der Lebensbedingungen, die Stärkung der Rolle der Frau, die Förderung lokaler Partizipation, den Ausbau sozialer Netzwerke sowie die Stärkung einer sozioterritorialen Identität zum Ziel haben, auf ihre realen Entwicklungs- und Partizipationspotenziale überprüft. Die Erhebung kam dabei zu dem Ergebnis, dass im Rahmen der untersuchten Projekte nachweislich eine deutliche Verbesserung innerhalb der medizinischen Grundversorgung der Bevölkerung erreicht wurde. Darüber hinaus wurden die neu angebotenen Partizipationsräume meistens breit genutzt und trugen insbesondere zu einer Stärkung der Rolle der Frauen in den jeweiligen Gemeinden bei. Allerdings weisen resultierend aus einer fehlenden institutionellen Konsolidierung und klaren Zuweisung der Verantwortlichkeiten im Kontext der staatlichen Sozialstrategie, sowohl die aktuellen Förderkonzepte, als auch die Ausgestaltung der konkreten Projekt- bzw. Programmumsetzung einen eher provisorischen Charakter auf.

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