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1

Crispen's Five Antivirus Rules.  

ERIC Educational Resources Information Center

Explains five rules to protect computers from viruses. Highlights include commercial antivirus software programs and the need to upgrade them periodically (every year to 18 months); updating virus definitions at least weekly; scanning attached files from email with antivirus software before opening them; Microsoft Word macro protection; and the…

Crispen, Patrick Douglas

2000-01-01

2

AVG Anti-Virus  

NSDL National Science Digital Library

Those who wish for an antivirus program that is both versatile and reliable should definitely consider this latest iteration of the AVG Anti-Virus program. With this program, visitors can be assured that AVG will look for new virus definitions on a daily basis and that it will also create an effective rescue disk in case a dire situation emerges. This website features a number of archived versions of the AVG software for users to choose from.

2008-01-01

3

Crispen's Five Antivirus Rules.  

ERIC Educational Resources Information Center

Provides rules for protecting computers from viruses, Trojan horses, or worms. Topics include purchasing commercial antivirus programs and keeping them updated; updating virus definitions weekly; precautions before opening attached files; macro virus protection in Microsoft Word; and precautions with executable files. (LRW)

Crispen, Patrick Douglas

2000-01-01

4

Avast Free Antivirus  

NSDL National Science Digital Library

Avast Free Antivirus has been around for sometime, and this latest edition has some notable new features. Perhaps the most significant change here is the very helpful user interface, which includes a new tabbed section and a context sensitive help menu. Visitors can also use the real-time shields to protect against spyware and viruses originating from hundreds of sources. This version is compatible with computers running Windows 2000 and newer.

5

Sophos Anti-Virus for Windows, version 7 user manual  

E-print Network

Sophos Anti-Virus for Windows, version 7 user manual For Windows 2000 and later Document date: August 2008 #12;Contents 1 About Sophos Anti-Virus ........................................................................................................................3 2 Introduction to Sophos Anti-Virus

6

P2PAV: Antivirus through P2P  

Microsoft Academic Search

Antivirus software is one of the most widely installed software for protecting computer from malicious attacks. However, traditional host-based antivirus needs to store all viruses' pattern or sample, which not only needs large local storage, but also fails to detect modern threats in time. The newly come cloud-based antivirus, which needs no extra local storage and compares virus' pattern on

Li Zhang; Zhao Wang; Zhong Chen

2012-01-01

7

Lab Anti-Virus Policy 1.0 Purpose  

E-print Network

Lab Anti-Virus Policy COE­LAV­02 1.0 Purpose To establish requirements which must be met by all computers connected to College of Engineering lab networks to ensure effective virus detection facilities must have a reputable vendor's anti-virus software installed, and scheduled to scan the system

Demirel, Melik C.

8

Page 1 of 4 University of Warwick Antivirus Policy June 2002 University of Warwick Anti-Virus Policy  

E-print Network

Page 1 of 4 University of Warwick Antivirus Policy June 2002 University of Warwick Anti-Virus Policy Scope This document describes the measures taken by the University to counter computer viruses and the responsibilities of individuals, departments and IT Services in protecting the University against viruses

Davies, Christopher

9

AMG Anti-Virus Free Edition 9.0  

NSDL National Science Digital Library

With this version of its popular product, AMG Anti-Virus is offering a few new notable highlights. For one, visitors can use the full-featured scheduling utility for automating tasks and checking for new definitions. This version of Anti-Virus also includes new anti-phishing detection techniques and an up-to-date link scanner. Users running Windows 2000 and newer as well as Linux will be able to use this application.

10

Guidelines for Anti-Virus Protection Recommended processes to prevent virus problems  

E-print Network

Guidelines for Anti-Virus Protection COE­AVP­01 Recommended processes to prevent virus problems: · Always run either the current University site licensed anti-virus software, which is available from the University download site or through ECS, or other reputable anti-virus software. · Download and run

Demirel, Melik C.

11

GrAVity: A Massively Parallel Antivirus Engine Giorgos Vasiliadis and Sotiris Ioannidis  

E-print Network

GrAVity: A Massively Parallel Antivirus Engine Giorgos Vasiliadis and Sotiris Ioannidis Institute to perform match- ing of suspicious data against those signatures. In this paper, we present GrAVity, a massively parallel antivirus engine. Our engine utilized the compute power of modern graphics processors

Markatos, Evangelos P.

12

[Anti-virus research of triterpenoids in licorice].  

PubMed

Licorice is a leguminous plant of glycyrrhiza. It is a traditional Chinese herbal medicine. Triterpenoid is one of the mainly active components of licorice. In recent years, the broad-spectrum antiviral activity of many triterpenoids in licorice was confirmed, and these findings have become a hot spot of antiviral immunity. The triterpenoids of licorice has the potential to become a novel broad-spectrum antiviral medicine and will be widely used in the clinical treatment. This review provided a summary of the recent anti-virus research progress on several triterpenoids in licorice, such as glycyrrhizic acid, glycyrrhizin, glycyrrhetinic acid and its derivatives. The antiviral roles of triterpenoids in licorice against herpes virus, HIV, hepatitis virus, SARS coronavirus and influenza virus were briefly summarized. PMID:24520776

Pu, Jie-Ying; He, Li; Wu, Si-Yu; Zhang, Ping; Huang, Xi

2013-11-01

13

East Tennessee State University Symantec Campus Agreement Student / Employee Personal Computer Antivirus Request  

E-print Network

East Tennessee State University Symantec Campus Agreement Student / Employee Personal Computer Antivirus Request East Tennessee State University (ETSU) has purchased the Symantec Campus Agreement, which understand that no technical support is provided by East Tennessee State University. _____ I understand

Karsai, Istvan

14

Impact of anti-virus software on computer virus dynamical behavior  

NASA Astrophysics Data System (ADS)

The impact of anti-virus software on the spreading of computer virus is investigated via developing a mathematical model in this paper. Considering the anti-virus software may not be effective, as it may be an outdated version, and then the computers may be infected with a reduced incidence rate. According to the method of next generation matrix, the basic reproduction number is derived. By introducing appropriate Lyapunov function and the Routh stability criterion, acquiring the stability conditions of the virus-free equilibrium and virus equilibrium. The effect of anti-virus software and disconnecting rate on the spreading of virus are also analyzed. When combined with the numerical results, a set of suggestions are put forward for eradicating virus effectively.

Sun, Mei; Li, Dandan; Han, Dun; Jia, Changsheng

2014-11-01

15

Coping with Computer Viruses: General Discussion and Review of Symantec Anti-Virus for the Macintosh.  

ERIC Educational Resources Information Center

Discusses computer viruses that attack the Macintosh and describes Symantec AntiVirus for Macintosh (SAM), a commercial program designed to detect and eliminate viruses; sample screen displays are included. SAM is recommended for use in library settings as well as two public domain virus protection programs. (four references) (MES)

Primich, Tracy

1992-01-01

16

Live virus-free or die: coupling of antivirus immunity and programmed suicide or dormancy in prokaryotes  

PubMed Central

Background The virus-host arms race is a major theater for evolutionary innovation. Archaea and bacteria have evolved diverse, elaborate antivirus defense systems that function on two general principles: i) immune systems that discriminate self DNA from nonself DNA and specifically destroy the foreign, in particular viral, genomes, whereas the host genome is protected, or ii) programmed cell suicide or dormancy induced by infection. Presentation of the hypothesis Almost all genomic loci encoding immunity systems such as CRISPR-Cas, restriction-modification and DNA phosphorothioation also encompass suicide genes, in particular those encoding known and predicted toxin nucleases, which do not appear to be directly involved in immunity. In contrast, the immunity systems do not appear to encode antitoxins found in typical toxin-antitoxin systems. This raises the possibility that components of the immunity system themselves act as reversible inhibitors of the associated toxin proteins or domains as has been demonstrated for the Escherichia coli anticodon nuclease PrrC that interacts with the PrrI restriction-modification system. We hypothesize that coupling of diverse immunity and suicide/dormancy systems in prokaryotes evolved under selective pressure to provide robustness to the antivirus response. We further propose that the involvement of suicide/dormancy systems in the coupled antivirus response could take two distinct forms: 1) induction of a dormancy-like state in the infected cell to ‘buy time’ for activation of adaptive immunity; 2) suicide or dormancy as the final recourse to prevent viral spread triggered by the failure of immunity. Testing the hypothesis This hypothesis entails many experimentally testable predictions. Specifically, we predict that Cas2 protein present in all cas operons is a mRNA-cleaving nuclease (interferase) that might be activated at an early stage of virus infection to enable incorporation of virus-specific spacers into the CRISPR locus or to trigger cell suicide when the immune function of CRISPR-Cas systems fails. Similarly, toxin-like activity is predicted for components of numerous other defense loci. Implications of the hypothesis The hypothesis implies that antivirus response in prokaryotes involves key decision-making steps at which the cell chooses the path to follow by sensing the course of virus infection. Reviewers This article was reviewed by Arcady Mushegian, Etienne Joly and Nick Grishin. For complete reviews, go to the Reviewers’ reports section. PMID:23151069

2012-01-01

17

Sistemas de pago a prestadores de servicios de salud en países de América Latina y de la OCDE  

Microsoft Academic Search

Además de ser uno de los componentes más importantes de las relaciones contractuales entre los agentes de los sistemas de salud, el sistema de pago a prestadores es relevante para algunos de los principales criterios de valoración de un sistema de salud, como la eficiencia y la calidad. En este artículo tratamos de proporcionar un marco analítico sencillo para comprender

Begoña Alvárez; Laura Pellisé; Félix Lobo

2000-01-01

18

Selección de los principales problemas de seguridad de las vacunas  

Microsoft Academic Search

ExtractoEjemplos recientes de los principales beneficios en salud pública de la vacunación incluyen reducciones globales de la mortalidad por sarampión y el registro de niveles bajos de enfermedades evitables por vacunas en Estados Unidos. No obstante, los problemas reales o percibidos de seguridad de las vacunas pueden ejercer un impacto adverso sobre los programas de vacunación. La monitorización sólida de

John K. Iskander; Jane Gidudu; Nelson Arboleda; Wan-Ting Huang

2008-01-01

19

Antivirus software Spyware protection  

E-print Network

is not available in uT; however, uT provides residents with high-speed Ethernet service and a connection to the high- speed campus data network and the internet. When your computer is equipped with an Ethernet access to ResNet high-speed data communication services (see the ResNet article above). Students living

20

Effect of various absorption enhancers based on tight junctions on the intestinal absorption of forsythoside A in Shuang-Huang-Lian, application to its antivirus activity  

PubMed Central

Background: Forsythoside A (FTA), one of the main active ingredients in Shuang–Huang–Lian (SHL), possesses strong antibacterial, antioxidant and antiviral effects, and its pharmacological effects was higher than that of other ingredients, but the absolute bioavailability orally was approximately 0.72%, which was significantly low, influencing clinical efficacies of its oral preparations seriously. Materials and Methods: In vitro Caco-2 cell and in vivo pharmacokinetics study were simultaneously performed to investigate the effects of absorption enhancers based on tight junctions: sodium caprate and water-soluble chitosan on the intestinal absorption of FTA, and the eventual mucosal epithelial damage resulted from absorption enhancers was evaluated by MTT test and morphology observation, respectively. The pharmacological effects such as antivirus activity improvement by absorption enhancers were verified by MDCK damage inhibition rate after influenza virus propagation. Results: The observations from in vitro Caco-2 cell showed that the absorption of FTA in SHL could be improved by absorption enhancers. Meanwhile, the absorption enhancing effect of water-soluble chitosan may be almost saturable up to 0.0032% (w/v), and sodium caprate at concentrations up to 0.64 mg/mL was safe, but water-soluble chitosan at different concentrations was all safe for these cells. In pharmacokinetics study, water-soluble chitosan at dosage of 50 mg/kg improved the bioavailability of FTA in SHL to the greatest extent, and was safe for gastrointestine from morphological observation. Besides, treatment with SHL with water-soluble chitosan at dosage of 50 mg/kg prevented MDCK damage after influenza virus propagation better significantly than that of control. Conclusion: Water-soluble chitosan at dosage of 50 mg/kg might be safe and effective absorption enhancer for improving the bioavailability of FTA and the antivirus activity in vitro in SHL. PMID:24695554

Zhou, Wei; Zhu, Xuan Xuan; Yin, Ai Ling; Cai, Bao Chang; Wang, Hai Dan; Di, Liuqing; Shan, Jin Jun

2014-01-01

21

Determinantes del Gasto Público en Educación y Resultados del sistema educativo por Comunidades Autónomas  

Microsoft Academic Search

RESUMEN Este trabajo tiene como objetivo analizar el gasto público en educación y sus principales determinantes por Comunidades Autónomas durante el período 2000-2004. Al mismo tiempo, trata de analizar la incidencia del mismo en términos de los resultados obtenidos por el sistema educativo en las distintas Comunidades Autónomas. ABSTRACT This paper analyzes the regional public spending in education during 2000-2004

Alfonso Utrilla de la Hoz; Carmen Mitxelena Camiruaga

2007-01-01

22

TUDE LMENTAIRE DE LA RFRACTION DANS UN PRISME HORS DE LA SECTION PRINCIPALE. LOIS DE BRAVAIS  

E-print Network

�TUDE �L�MENTAIRE DE LA R�FRACTION DANS UN PRISME HORS DE LA SECTION PRINCIPALE. LOIS DE BRAVAIS d'un rayon à travers un prisme hors du plan de la section principale. D'un point 0 quelconque (fig vecteur BA est :parallèle à la normale à la première face du prisme. Article published online by EDP

Paris-Sud XI, Université de

23

El Sistema's Open Secrets  

ERIC Educational Resources Information Center

In this article, the author talks about Venezuela's national youth orchestra program called El Sistema whose attributes offer a direct challenge to traditional Western music practices. As U.S. classical music--and all "high arts"--struggle to find relevance to more than the small "arts club" percentage of the U.S. populace, El Sistema proposes…

Booth, Eric

2011-01-01

24

Gasto público en educación frente al comportamiento de los principales agregados económicos en Latinoamérica  

Microsoft Academic Search

La educación es una de las principales herramientas utilizadas por los gobiernos para lograr el crecimiento y desarrollo de un país. En consecuencia, las inversiones que se hagan en este rubro impactan, positivamente, de alguna manera, el comportamiento de variables económicas tales como el Producto Interno Bruto y la tasa de desempleo. Desafortunadamente, este escenario no siempre resulta ser así

Fabio Enrique Gómez Meneses; María Alexandra Zárate Camelo

2011-01-01

25

SISTEMAS DE TELECOMUNICAES  

E-print Network

informática, fundamentos de redes e sistemas de comunicação ) para se especializar no estudo após as técnicas Comunicações (sinal e processamento de dados, eletrônica, propagação eletromagnética, os fundamentos de projeto de sistemas de comunicação com fio (rede telefônica, ADSL, redes de fibra óptica, Internet) e sem

Rey Juan Carlos, Universidad

26

Sistemas Inteligentes iv Sumario  

E-print Network

Sistemas Inteligentes #12;iv Sum´ario 2.9 Perspectivas Futuras . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 4 Conceitos sobre Aprendizado de M´aquina 39 4.1 Introdu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 #12;Cap´itulo 4 Conceitos sobre Aprendizado de M´aquina Maria Carolina Monard Jos´e Augusto

Baranauskas, José Augusto

27

Le travail de deuil Le travail de deuil consiste principalement dsinvestir l'amour pour un objet perdu.  

E-print Network

Le travail de deuil Le travail de deuil consiste principalement à désinvestir l'amour pour un objet quelques restes d'amour ou de pitié qui se présentent à son imagination tirent de véritables larmes de ses

Boyer, Edmond

28

Modelizacin de sistemas deterministas. Leo M. Gonzlez  

E-print Network

= · - B = 0 y hubo luz. Leo M. González leo.gonzalez@upm.es Modelización de sistemas deterministas. #12Modelización de sistemas deterministas. Leo M. González Escuela Complutense Latinoamericana, Buenos Aires, Febrero 2012 Leo M. González leo.gonzalez@upm.es Modelización de sistemas deterministas. #12

Figueira, Santiago

29

Thoughts on Seeing "El Sistema"  

ERIC Educational Resources Information Center

The FESNOJIV (the Spanish acronym for the State Foundation for the National System of Youth and Children's Orchestras), more commonly known as "El Sistema," teaches 300,000 of Venezuela's poorest children in the nationwide music learning program. Many begin attending the "nucleo" as early as age two or three, and the vast majority continue well…

Booth, Eric

2009-01-01

30

Knowledge Exchange with Sistema Scotland  

ERIC Educational Resources Information Center

This paper reports on a knowledge exchange project, funded by the Scottish Funding Council and undertaken by a group of researchers from three higher education institutions in Scotland and the project partner, Sistema Scotland. This newly established charity is attempting to implement a major programme of social change, developed in Venezuela,…

Allan, Julie; Moran, Nikki; Duffy, Celia; Loening, Gica

2010-01-01

31

Caracterisation de la signature spectrale des unités de paysages tropicaux a l'aide de l'analyse en composantes principales (ACP)  

NASA Astrophysics Data System (ADS)

La distribution des valeurs radiométriques recalculées par l'Analyse en Composantes Principales (ACP), des points d'une image multispectrale, peut être représentée dans le plan des deux premiers axes (composantes ayant les plus fortes valeurs propres). On définit alors dans ce plan des domaines caractérisant les unités de paysage recherchées, afin de classer les points de l'image.

Chaume, D.; Nguyen, T.; Oudin, M. F.; Savary, G.

32

4O de la direction principale du polariseur. En rsum, si le pola--ri:;eur et la double rfraction du quartz conservent une orientation fixe,  

E-print Network

fait la section principale de l'analyseu1- avec celle du polariseur sont alors 7c et 2'~ + 2013 Cette perturbations nuisibles. Elles sont produites par la synchronisation des oscillations propres de l'équipage et'après la théorie connue de la synchronisa- tion des oscillants. La synchronisation se produira d

Paris-Sud XI, Université de

33

Poich il28 Ottobre prevista alla stessa ora l'Assemblea Generale del Personale nell'Androne Principale del Policlinico Umberto I  

E-print Network

'Androne Principale del Policlinico Umberto I: E' convocata la Riunione di tutti i componenti della R.S.U. per Policlinico Umberto I; 5) Situazione Personale del Policlinico Umberto I; 6) Progetti obiettivi: attività in regime di straordinario (Policlinico Umberto I); 7) Ipotesi di dotazione organica per il personale del

Guidoni, Leonardo

34

Tecnologa para todos Sistema Inalmbrico de Rice  

E-print Network

Tecnología para todos Sistema Inalámbrico de Rice Andrea Trevino Rice University http://www.techforall.org/tfa_wireless.html http://tfa.rice.edu #12;Por qué en Pecan Park? La Misión de TFA: Proporcionar conocimientos a la comunidad. El propósito de Rice: Usar este programa para explorar la siguiente generación del sistema

35

Sistemas de reescritura de redes* M. Llorens, J. Oliver  

E-print Network

Sistemas de reescritura de redes* M. Llorens, J. Oliver Univ. Polit´ecnica de Valencia. Depto´amicos utilizando extensiones de las redes de Petri. Comenzamos recordando la noci´on de sistema de reescritura de redes y probamos que tales sistemas tienen el mismo poder computacional que la m´aquina de Turing. Una

Alpuente, María

36

El Sistema and American Music Education  

ERIC Educational Resources Information Center

The brainchild of Jose Antonio Abreu, El Sistema, a music education program for aspiring orchestra musicians launched in Venezuela for students of limited means and now spreading to other parts of the world, has become a subject of interest to music teachers and teacher educators in North America. This article examines a bit of the program's…

Lesniak, Melissa

2012-01-01

37

UNIVERSIDADE FEDERAL DO PARAN SISTEMA DE BIBLIOTECAS  

E-print Network

, composta por teses, dissertações, livros, separatas, monografias de cursos de especialização, fotografias e acervo do Sistema de Bibliotecas da UFPR é composto por livros, teses, dissertações e monografias, além Acervo do SiBi - UFPR Livros (1) Outros materiais (2) PeriódicosBibliotecas Títulos exemplares exemplares

Paraná, Universidade Federal do

38

Las estadísticas Oficiales de Turismo: principales lagunas en el contexto nacional e internacional \\/Official Statistics of Tourism: Major Gaps in the National and International Context  

Microsoft Academic Search

En el ámbito de las estadísticas de turismo se han producido notables desarrollos en los últimos años, tanto por parte del sector público como del privado. El actual sistema de estadísticas oficiales de turismo en España se puede considerar como uno de los más desarrollados en el contexto internacional pero todavía persisten importantes lagunas de información. La comparabilidad de resultados

FERNANDO CORTINA GARCIA

2011-01-01

39

Sobre os sistemas de referência celeste  

NASA Astrophysics Data System (ADS)

Apresentamos neste trabalho, algumas discussões sobre os sistemas de referência utilizados em Astronomia. Claramente, não é possível esgotar todo este assunto num único texto, mas esperamos, contudo, que o presente material possa ser apreciado nos cursos de Introdução à Astronomia, que estão cada vez mais presentes nas atuais propostas curriculares das graduações de Física. As discussões pertinentes às "Bases de Referência Celeste", serão apresentadas em um outro trabalho.

Poppe, P. C. R.; Martin, V. A. F.

2003-02-01

40

UNIVERSIDADE FEDERAL DO PARAN SISTEMA DE BIBLIOTECAS  

E-print Network

, composta por teses, dissertações, livros, separatas, monografias de cursos de especialização, fotografias e do Sistema de Bibliotecas da UFPR é composto por livros, teses, dissertações e monografias, além deBi/UFPR ­ 2012 Livros (1) Outros materiais (2) Periódicos Bibliotecas Títulos exemplares exemplares Títulos AG 18

Paraná, Universidade Federal do

41

puisement professionnel : principales approches conceptuelles,  

E-print Network

Philippe Zawieja1,2 , Franck Guarnieri1 L'épuisement professionnel, ou burnout, n'est évidemment pas un'historiographie officielle fait généralement remonter la naissance du burnout à 1969. Mais le verbe « to burn out » est sur le burnout une assise universitaire qui leur faisait jusque lors défaut (Maslach, 1976 ; Maslach

Boyer, Edmond

42

Anti-Virus Policy 1.0 Purpose  

E-print Network

connected to the College of Chemistry's networks to ensure effective virus detection and prevention. 2 into College of Chemistry 's networks (e.g., viruses, worms, Trojan horses, e-mail bombs, etc.) are prohibited

Iglesia, Enrique

43

Avira AntiVir Personal-Free Antivirus  

NSDL National Science Digital Library

Viruses are quite pesky, and the free version of Avira AntiVir Personal can help those bedeviled by such afflictions. This application will help users locate and remove Trojans, worms, and backdoor programs. Users can customize their scans and they can elect to fully scan all hard drives. This version is compatible with computers running Windows 2000, XP, and Vista.

2008-01-01

44

CNS-P-I-ANTIVIRUS-A.doc 1/6 Printed on: 23/05/2008 Anti-Virus Policy  

E-print Network

effective virus detection and prevention. Source: Computing and Networking Services (CNS). Approved by.g. viruses, worms, Trojan horses, e-mail bombs, etc.) is strictly prohibited. 4. If an employee receives what

Shihadeh, Alan

45

Sistemas Correctores de Campo Para EL Telescopio Cassegrain IAC80  

NASA Astrophysics Data System (ADS)

El proyecto de instrumentación de mayor importancia que ha tenido el Instituto de Astrofisica de Canarias en los últimos afios ha sido el diseflo y construcción del te1escopio IAC8O. Este requería del esfuerzo con junto en mec´nica, óptica y electrónica, lo que facilitó la estructuración y el crecimiento de los respectivos grupos de trabajo, que posteriormente se integraron en departamentos En su origen (1977), el telescopio IAC80 fue concebido como un sistema clásico tipo Cassegrain, con una razón focal F/i 1.3 para el sistema Casse grain y una razón focal F/20 para el sistema Coudé. Posteriormente, aunque se mantuvo la filosofia de que el sistema básico fuera el F/11.3, se consideró conveniente el diseño de secundarios para razones focales F/16 y F/32, y se eliminó el de F/20. Sin embargo, dada la importancia relativa que un foco estrictamente fotográfico tiene en un telescopio moderno, diseñado básicamente para fotometría fotoeléctrica y con un campo util mínimamente de 40 minutos de arco, se decídió Ilevar a cabo el diseño de un secundario F/8 con un sistema corrector de campo, pero que estuviera formado únicamente por lentes con superficies esféricas para que asl su construcción fuera posible en España ó en México. La creciente utilización de detectores bidimensionales para fines de investigación astron6mica y la viabilidad de que en un futuro cercano éstos tengan un área sensible cada vez mayor, hicieron atractiva la idea de tener diseñado un sistema corrector de campo para el foco primario (F/3), con un campo útil mínimo de un grado, y también con la limitante de que sus componentes tuvieron sólamente supérficies esféricas. Ambos diseños de los sis-temas correctores de campo se llevaron a cabo, en gran medida, como parte de un proyecto de colaboración e intercambio en el área de diseño y evaluación de sistemas ópticos.

Galan, M. J.; Cobos, F. J.

1987-05-01

46

Teoria de la forma y sistemas dinamicos II Antonio GIRALDO  

E-print Network

Teor´ia de la forma y sistemas din´amicos II Antonio GIRALDO y Jos´e Manuel R. SANJURJO-saddle" de un ANR compacto. Tambi´en se presenta un estudio, basado en la teor´ia de la forma, de los Mathematics Subject Classification: 55P55, 54C56, 37B25, 37B30. Key words: Teor´ia de la forma, sistema din

Ruiz, Jesús M.

47

Tarântula - Sistema de Recolha de Documentos da Web  

Microsoft Academic Search

A recolha de colec??es de documentos é uma tarefa cada vez mais comum nos sistemas que actuam sobre a WWW. Este artigo apresenta um novo sistema de recolha de documentos da Web, com características de configura??o, integra??o e distribui??o que permitem a sua fácil adapta??o e integra??o em aplica??es de diferentes naturezas. Descrevemos a sua arquitectura, funcionamento e os resultados

Daniel Gomes; Mário J. Silva

2001-01-01

48

ALTERNATIVAS DE REUTILIZACIÓN DE AGUAS RESIDUALES REGENERADAS EN SISTEMAS DE TRATAMIENTO DE LA PENÍNSULA DE PARAGUANÁ  

Microsoft Academic Search

Esta investigación tuvo como objetivo proponer alternativas de reutilización del agua regenerada por los Sistemas de Tratamiento de Aguas Residuales Domesticas existentes en la Península de Paraguana. La investigación inicio con la identificación de los Sistemas de Tratamiento de Aguas Residuales Domesticas existentes en la Península de Paraguana, se realizaron visitas para describir la situación actual de los Sistemas. Además,

Maria Beatriz Bracho; Zuleima Escalona; Roberto Garcia

2008-01-01

49

Alternativas de reutilización de aguas residuales regeneradas en sistemas de tratamiento de la península de Paraguaná  

Microsoft Academic Search

Esta investigación tuvo como objetivo proponer alternativas de reutilización del agua regenerada por los Sistemas de Tratamiento de Aguas Residuales Domesticas existentes en la Península de Paraguana. La investigación inicio con la identificación de los Sistemas de Tratamiento de Aguas Residuales Domesticas existentes en la Península de Paraguana, se realizaron visitas para describir la situación actual de los Sistemas. Además,

Maria Beatriz Bracho; Zuleima Escalona; Roberto Garcia

2008-01-01

50

Capacidad de pago de los usuarios del sistema UPAC  

Microsoft Academic Search

Desde su creación en 1972, el sistema UPAC ha generado grandes controversias, en algunas ocasiones sustentadas en hechos económico-financieros, en otras basadas en posiciones y creencias personales, y en otras fundamentadas en situaciones de las corporaciones de ahorro y vivienda o de los usuarios. Esto ha originado una gran polarización de conceptos y opiniones que obligan a revisar en detalle

Rodrigo Varela Villegas; Royman Ricardo Cañón López; Carlos M. Restrepo

1998-01-01

51

PRINCIPALES CARACTERISTIQUES PHYSIONOMIQUES FLORISTIQUES DES FORMATIONS FORESTIERES  

E-print Network

AUBREVILLE (1938). Les formations forestières s'y caractérisent par leur diversité et par leur morcellement. Photo 1. - Diversité et morcellement des formations forestières à Lamto ; au second plan, à gauche et à

Paris-Sud XI, Université de

52

Sistemas Distribuidos e Redes de Sensores Mais Chamada Remota de Procedimento  

E-print Network

Sistemas Distribu´idos e Redes de Sensores Mais Chamada Remota de Procedimento abril de 2013 Sistemas Distribu´idos e Redes de Sensores #12;RPC ­ refer^encias A. Birrell and B. Nelson. 1984´idos e Redes de Sensores #12;RPC: concorr^encia e assincronismo no cliente oneway futuros chamadas ass

Rodriguez, Noemi

53

Uma Ferramenta de Monitoramento de Redes usando Sistemas Gerenciadores de Streams de Dados  

E-print Network

Uma Ferramenta de Monitoramento de Redes usando Sistemas Gerenciadores de Streams de Dados Natascha uma ferramenta gen´erica de monitoramento de redes utilizando um Sistema Gerenciador de Streams de¸~oes e topologias de rede, considerando tamb´em diver- sos objetivos de monitoramento. As medic¸~oes s

Hara, Carmem Satie

54

Algunos indicadores de equidad, eficiencia, y eficacia del sistema de financiación de la Universidad  

Microsoft Academic Search

En el presente trabajo se pretende analizar la eficiencia, eficacia y equidad del actual sistema de financiación de nuestra Universidad. Existe acuerdo en que el sistema actual no responde a criterios objetivos y en buena medida, como consecuencia de ello, no genera una asignación de recursos entre las diferentes universidades que responda adecuadamente a los criterios de equidad, eficiencia y

Laura de Pablos Escobar; María Gil Izquierdo

2004-01-01

55

INTEGRACI ´ ON POR CUANTIFICACI ´ ON DE SISTEMAS STIFF. PARTE I: TEORIA  

Microsoft Academic Search

Este art´ iculo presenta un nuevo metodo de integracion numerica de ecuaciones diferenciales ordinarias basado en la cuantificacion de las variables de estado. Utilizando conceptos de integracion impl´ icita, el nuevo metodo denominado BQSS (Backward Quantized State Systems) permite integrar sistemas stiff de manera eficiente. Siendo el primer metodo de cuantificacion para sistemas stiff, BQSS es en s´ iu n

Ernesto Kofman; Gustavo Migoni

56

Compito di Teoria dei sistemi 1) Si consideri il sistema a tempo discreto  

E-print Network

Compito di Teoria dei sistemi 1) Si consideri il sistema a tempo discreto x(t + 1) = -2 3 0 -0.5 x permanente 1 #12;Compito di Teoria dei sistemi 1. Studiare al variare del parametro k la stabilit`a del della struttura della risposta. 2 #12;Compito di Teoria dei Sistemi 1. E' dato il sistema lineare

Monaco, Salvatore

57

Directrices básicas para la auditoría de sistemas de gestión de calidad en instituciones de educación superior  

Microsoft Academic Search

En las páginas siguientes, se presenta un marco de directrices básicas para la auditoría de sistemas de gestión de calidad a las instituciones de educación superior, en especial de sus programas de postgrado. En este trabajo se indaga, básicamente sobre, la conceptualización de la auditoría de sistemas y la particularización de las categorías de auditoría, además se aborda los principios

Manuel Vélez C; Paulo Vélez León

2008-01-01

58

Coordinación de los sistemas de gestión de calidad, medio ambiente y salud laboral  

Microsoft Academic Search

La aparición sucesiva de los tres sistemas de gestión mencionados en el título, junto con los diferentes ámbitos de aplicación de los mismos, ha llevado a que las empresas los hayan puesto en marcha de manera independiente. A pesar de las numerosas similitudes entre los objetivos y procedimientos contemplados en dichos sistemas, por razones históricas y, en muchos casos, por

Miguel A. Rodriguez; Joan E. Ricart

2000-01-01

59

Instantánea de los cánceres de cerebro y del sistema nervioso central  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre los cánceres de cerebro y del sistema nervioso central; así como ejemplos de actividades del NCI y adelantos en la investigación de estos tipos de cáncer.

60

Exploración del Sistema Solar -- Una mirada hacia el futuro - Duration: 0:30.  

NASA Video Gallery

¿Piensas que ya sabemos todo acerca de nuestro sistema solar? La realidad es que apenas hemos comenzado con lo que hay para conocer. Únete a la NASA, en el envío de misiones a los confines del sist...

61

Rev. Esp. Doc. Cient., 25, 3, 2002 267 EL SISTEMA DE REVISIN POR EXPERTOS  

E-print Network

Rev. Esp. Doc. Cient., 25, 3, 2002 267 EL SISTEMA DE REVISI�N POR EXPERTOS (PEER REVIEW): MUCHOS;Juan Miguel Campanario 268 Rev. Esp. Doc. Cient., 25, 3, 2002 Los investigadores en áreas relacionadas

Campanario, Juan Miguel

62

Arquitectura del Sistema de Gestin del ancho de Banda y Proteccin (SGBP) para entornos de redes  

E-print Network

Arquitectura del Sistema de Gestión del ancho de Banda y Protección (SGBP) para entornos de redes de banda y protección para entornos de redes MPLS. El sistema está formado por dos módulos, el de de banda. 1. Introducción La evolución de las tecnologías de las comunicaciones hacia redes de

Ortega, Eusebi Calle

63

H cada vez mais raparigas no sis-tema de ensino, elas tm melhores  

E-print Network

educação e ci- dadania -- , o ar do tempo é outro. Será que, afinal, são os homens o sexo frágil, e que de ambos os sexos pelo sistema educativo gera divergências. As maiores polemicas aconte cem nos sistema educativo pa- ra ajudar os alunos do sexo masculi- no a ultrapassai' as suas dificulda- des

Instituto de Sistemas e Robotica

64

Novas estratgias comunicativas como fator de qualidade na interao de surdos em um sistema organizacional  

E-print Network

122 Novas estratégias comunicativas como fator de qualidade na interação de surdos em um sistema formulário web e verificar se o uso de novas estratégias comunicativas melhora a interação dos surdos. Foram (MAC), uma com a interface original do sistema, e outra com o uso de novas estratégias comunicativas

Barbosa, Alberto

65

Instituto de Fsica Interdisciplinaria y Sistemas Complejos (IFISC) El IFISC (Instituto de Fsica Interdisciplinaria y Sistemas Complejos) es un centro de titularidad compartida  

E-print Network

and Mechanisms of Social Interactions in the Big Data Era, con la colaboración de la Universidad Carlos III de ecología y fisiología -- Dinámica y efectos colectivos en sistemas sociales Resumen de las actividades y, International Federation for Information Processing y la Network of Excellence in Internet Science (del 9 al 10

Oro, Daniel

66

Sistemas Distribuidos e Redes de Sensores Aula 6: Outros Padr~oes disseminac~ao e roteamento  

E-print Network

Sistemas Distribu´idos e Redes de Sensores Aula 6: Outros Padr~oes ­ dissemina¸c~ao e roteamento abril de 2013 Sistemas Distribu´idos e Redes de Sensores #12;Padr~oes de programas distribu´idos padr 1991, 49-90. Sistemas Distribu´idos e Redes de Sensores #12;Nota¸c~ao Andrews canais desacoplamento em

Rodriguez, Noemi

67

Cyber Security Challenges: Designing Efficient Intrusion Detection Systems and Antivirus Tools  

Microsoft Academic Search

Abstract: Introduction to Intrusion Detection SystemsIntrusion detection an important component of information security technology helps indiscovering, determining, and identifying unauthorized use, duplication, alteration, anddestruction of information and information systems. Intrusion detection relies on the assumptionthat information and information systems under attack exhibit several distinguishable behavioralpatterns or characteristics to that of the normal ones. Though intrusion detection...

Srinivas Mukkamala; Andrew Sung; Ajith Abraham

68

EL SISTEMA FINANCIERO DE ANGOLA Y ESTRATEGIAS DE FUTURO \\/ THE FINANCIAL SYSTEM OF ANGOLA AND FUTURE STRATEGIES  

Microsoft Academic Search

Los objetivos básicos de este artículo son presentar el actual Sistema Financiero de Angola tanto desde el punto de vista Institucional como de la Política Monetaria; realizar un análisis interno y externo del entorno competitivo del sistema financiero angoleño aplicando la Matriz DAFO o SWOT, con el objetivo de formular estrategias concretando, en una tabla resumen, la evaluación de los

M. Casanovas Ramón; A. de F. Jesus Fortes

2009-01-01

69

Esercitazione del 28 febbraio 2003 Progetto del sistema di controllo di vibrazione per la sospensione di un'automobile  

E-print Network

sospensione di un'automobile (sospensione attiva) Il sistema raffigurato rappresenta lo schema semplificato pneumatico-ammortizzatore-telaio di un'automobile. Il sistema è caratterizzato dalla massa equivalente M dell'automobile esercitare sulla ruota e sul telaio dell'automobile e come azione disturbante d il profilo dell'asperità del

Monaco, Salvatore

70

Esercitazione del 14 febbraio 2003 Progetto del sistema di controllo di vibrazione per la sospensione di un'automobile  

E-print Network

sospensione di un'automobile (sospensione attiva) Il sistema raffigurato rappresenta lo schema semplificato pneumatico-ammortizzatore-telaio di un'automobile. Il sistema è caratterizzato dalla massa equivalente M dell'automobile esercitare sulla ruota e sul telaio dell'automobile e come azione disturbante d il profilo dell'asperità del

Monaco, Salvatore

71

Esercitazione del 21 marzo 2003 Progetto del sistema di controllo di vibrazione per la sospensione di un'automobile  

E-print Network

di un'automobile (sospensione attiva) Il sistema raffigurato rappresenta lo schema semplificato pneumatico-ammortizzatore-telaio di un'automobile. Il sistema è caratterizzato dalla massa equivalente M dell'automobile esercitare sulla ruota e sul telaio dell'automobile e come azione disturbante d il profilo dell'asperità del

Monaco, Salvatore

72

Esercitazione del 7 marzo 2003 Progetto del sistema di controllo di vibrazione per la sospensione di un'automobile  

E-print Network

di un'automobile (sospensione attiva) Il sistema raffigurato rappresenta lo schema semplificato pneumatico-ammortizzatore-telaio di un'automobile. Il sistema è caratterizzato dalla massa equivalente M dell'automobile esercitare sulla ruota e sul telaio dell'automobile e come azione disturbante d il profilo dell'asperità del

Monaco, Salvatore

73

Social Responsibility and Community Development: Lessons from the Sistema de Aprendizaje Tutorial in Honduras  

ERIC Educational Resources Information Center

This article extends understanding of the connections between education, social capital, and development through a mixed-methods case study of the Sistema de Aprendizaje Tutorial, or SAT, an innovative secondary-level education system. The quantitative dimension of the research used survey measures of social responsibility to compare 93 SAT…

Honeyman, Catherine A.

2010-01-01

74

Redes Seguras Usando el Sistema GNU/Linux Luis Gerardo de la Fraga  

E-print Network

Redes Seguras Usando el Sistema GNU/Linux Luis Gerardo de la Fraga Secci´on de Computaci´on de redes se- guras: una por divisi´on de redes usando puer- tas (gateways), cortafuegos (firewalls), lo que generan los esquemas de redes militarizadas y redes desmilitarizadas; y otra por monito- reo

Fraga, Luis Gerardo de la

75

Análisis del sistema de costos en una empresa productora de pastas alimenticias  

Microsoft Academic Search

Los Sistemas de Costos son conjuntos de métodos, normas y procedimientos, que rigen la planificación, determinación y análisis del costo, así como el proceso de registro de los gastos de una o varias actividades productivas en una empresa, de forma interrelacionada con los subsistemas que garantizan el control de la producción y de los recursos materiales, laborales y financieros. En

Alberto Maximino Fuentes Martínez

2011-01-01

76

Another Perspective: El Sistema--A Perspective for North American Music Educators  

ERIC Educational Resources Information Center

Herein, Tricia Tunstall presents a critique of the article by Melissa Lesniak published in the December 2012 "Music Educators Journal," and offers a new perspective on the Venezuelan youth orchestra program known as "El Sistema." The program, which began in Caracas thirty-eight years ago, is dedicated to changing the lives of…

Tunstall, Tricia

2013-01-01

77

Five Encounters with "El Sistema" International: A Venezuelan Marvel Becomes a Global Movement  

ERIC Educational Resources Information Center

Genuine worldwide movements for social change are rare in human history. Even more rare is the phenomenon of a worldwide movement for social change through art, with teaching artists at the forefront. This article presents the evolution of such a movement now, in the global blossoming of "El Sistema," a program that seeks to change the…

Booth, Eric; Tunstall, Tricia

2014-01-01

78

Sistema de Monitoramento Visual das Telas Gr´ aficas das Estac¸˜ oes Linux numa Rede LTSP  

Microsoft Academic Search

This paper describes Monitux: a CGI program developed using shell- scripting, which allows monitoring station screens in a network using LTSP. The text discusses how the X server works and compares Monitux and VNC in a pos- sible usage situation. The article also details its implementation, advantages, downsides and test results. Resumo. Este artigo descreve o Monitux: um sistema desenvolvido

Herlon Ayres Camargo; Joaquim Quinteiro Uch

79

INFLUÊNCIA DE SISTEMAS DE PREPARO E PASTEJO NAS CARACTERÍSTICAS FÍSICAS DO SOLO  

Microsoft Academic Search

RESUMO - No Rio Grande do Sul, os sistemas integrados de agricultura e pecuária estão sendo adotados em extensas áreas que historicamente estavam submetidas ao binômio trigo-soja. Esta mudança na forma de exploração da terra origina uma nova condição que deve ser pesquisada para evitar efeitos indesejáveis no solo. Procurando determinar alterações nas propriedades físicas e mecânicas do solo, durante

MARCELO RESCHUTZEGGER GAGGERO; CARLOS RICARDO TREIN; E GABRIELA IPPOLITI

80

El enfoque de sistemas y de contingencias aplicado al proceso administrativo  

Microsoft Academic Search

El presente artículo corresponde a una reflexión sobre el proceso administrativo de las organizaciones (las funciones de planeación, organización, dirección o influencia y control) desde la perspectiva del enfoque de sistemas y de contingencias. Para ello se abordan los planteamientos más representativos de los distintos enfoques, desde el enfoque clásico, hasta los aportes más contemporáneos. El artículo finaliza con una

Francisco Velásquez Vasquez

2000-01-01

81

PLANIFICACIÓN COLABORATIVA Y UBICUA PARA EL APRENDIZAJE DEL DISEÑO EN EL SISTEMA DOMOSIM-TPC  

Microsoft Academic Search

Resumen En este artículo, como punto de partida, describimos parte de nuestra experiencia en un caso de estudio particular y sobre un e scenario real en el que se trabaja para resolver una cierta problemática asociada al aprendizaje del diseño domótico. Para este caso de estudio desarrollamos un sistema para el aprendizaje colaborativo basado en los paradigmas de interacción asistida

Miguel A. Redondo; Ana I. Molina; Crescencio Bravo; José Bravo; Manuel Ortega

82

Introduccin a los Sistemas de Informacin Pervasivos Abril 2007 Prof. R. LAURINI  

E-print Network

Batch Timesharing Mainframes Informática distribuida Minis Informática personal con red Micros- mientos Bases de imágenes y videos Bases de objetos 3D Principios de los sistemas de información. · Monitores de video · Routers, Hubs, III ­ Location based services · Descubrimiento de servicios

Laurini, Robert

83

188 Oliveira et al. Quim. Nova SISTEMA DE INJEO EM FLUXO ESPECTROFOTOMTRICO PARA MONITORAR PERXIDO DE  

E-print Network

188 Oliveira et al. Quim. Nova SISTEMA DE INJE��O EM FLUXO ESPECTROFOTOM�TRICO PARA MONITORAR injection analysis; foto-Fenton. ArtigoQuim. Nova, Vol. 24, No. 2, 188-190, 2001. INTRODU��O A reação foto

Jardim, Wilson de Figueiredo

84

O SISTEMA DE VISÃO COMPUTACIONAL DO TIME FUTEPOLI DE FUTEBOL DE ROBÔS  

Microsoft Academic Search

Resumo ? Partidas de futebol entre robôs constituem uma atividade que possibilita a realização de experimentos reais para o desen- volvimento e testes de robôs que apresentam comportamento inteligente e que cooperam entre si para a execução de uma tarefa, fo r- mando um time. Este artigo descreve o projeto e a implementação do sistema de visão computacional utilizado no

REINALDO A. C. BIANCHI; ANNA H. REALI-COSTA

2000-01-01

85

La Convenzione di Lanzarote e il suo impatto sul sistema italiano di tutela penale dei diritti della persona.  

E-print Network

??La presente tesi intende analizzare l’impatto della Convenzione di Lanzarote sull’ordinamento italiano, in particolare sul sistema penale dedicato alla tutela dei minori contro lo sfruttamento… (more)

FERRARO, SEBASTIANO

2013-01-01

86

Desenho e Avaliao do sistema BOA com base em Padres de Interfaces Sociais  

E-print Network

Desenho e Avaliação do sistema BOA com base em Padrões de Interfaces Sociais Alberto Rodrigues da-aprendizagem, como é o caso da plataforma Bolsa de Objectos de Aprendizagem (BOA). Este trabalho surge no seguimento dinamização e participação em comunidades suportadas pelo BOA. Este artigo, baseando-se na análise da

da Silva, Alberto Rodrigues

87

GENERAL TECHNICAL REPORT PSW-GTR-245 Aptitud Territorial Para Establecer Sistemas  

E-print Network

del Agua de Lluvia Contra Incendios Forestales1 José María León Villalobos2 , Manuel Anaya Garduño1 agua de lluvia (SCALL) pueden solucionar este problema. En el presente estudio, se realizó un análisis ante la falta de fuentes de agua cercanas. Los sistemas de captación del agua de lluvia (SCALL), que

Standiford, Richard B.

88

Sesin 3 -Sistemas Distribuidos y Aplicaciones Mdicas 89 Escuela de Computacin Universidad Central de Venezuela UCV  

E-print Network

Central de Venezuela UCV #12;II Simposio Científico y Tecnológico en Computación 201290 Escuela de Computación Universidad Central de Venezuela UCV #12;Sesión 3 - Sistemas Distribuidos y Aplicaciones Médicas 91 Escuela de Computación Universidad Central de Venezuela UCV #12;II Simposio Científico y

Coto, Ernesto

89

Sistemas Distribuidos e Redes de Sensores Aula 6,5...: Outros Padr~oes disseminac~ao e roteamento  

E-print Network

Sistemas Distribu´idos e Redes de Sensores Aula 6,5...: Outros Padr~oes ­ dissemina¸c~ao e roteamento abril de 2013 Sistemas Distribu´idos e Redes de Sensores #12;Observa¸c~oes sobre o padr´idos e Redes de Sensores #12;Algoritmo probe/echo Um probe ´e uma mensagem enviada por um n´o para o seu

Rodriguez, Noemi

90

DIA HORA AULA CURSO TITULACION ASIGNATURA 06/06/2013 15:00 DII 103 (30) 1 I.T. Informtica Sistemas lgebra (2)  

E-print Network

Tecnología de la Programación (5) 14/06/2013 15:00 1 I.T. Informática Sistemas Fundamentos Físicos de la (1) 12/06/2013 15:00 AII 208 (98) 3 I.T. Informática Sistemas Redes (21) 13/06/2013 12:00 3 I Sistemas Lógica Computacional (1) 18/06/2013 9:00 LI 004 (40) 3 I.T. Informática Sistemas Redes de Area

Rey Juan Carlos, Universidad

91

[Political challenges facing the consolidation of the Sistema Único de Saúde: a historical approach].  

PubMed

This article investigates the circumstances in which Brazil’s sanitation reform was conceived and the Sistema Único de Saúde (SUS) was constructed. A brief analysis is conducted of Brazil’s political transition to democracy, focusing on three political challenges facing the consolidation of SUS: its weak support base amongst workers, competition with the private sector, and the fragmentation of its administration caused by its municipalization. Finally, the changes in the scenario caused by the weakening of neoliberalism since the 2008 crisis, the reemergence of a multipolar political scenario internationally, and the financing conditions of the Brazilian State are described. PMID:24789485

Rodrigues, Paulo Henrique de Almeida

2014-01-01

92

Correlação de longo alcance em sistemas binários de raios-x usando remoção de flutuações  

NASA Astrophysics Data System (ADS)

Neste trabalho é proposta uma metodologia de analise de series temporais de fontes astrofísicas, baseada no método proposto por Peng et al. (1994) e Liu et al. (1999), o qual consiste na idéia de que uma série temporal correlacionada pode ser mapeada por um processo de busca de auto-similaridades em diversas escalas de tempo n. Removendo as eventuais tendências e integrando o sinal observado, é obtida uma medida do desvio médio quadrático das flutuações do sinal integrado F(n)~na, onde a representa o fator de escala associado com a auto-similaridade da correlação de longo alcance do sinal. Baseado nos valores obtidos de a, é possível distinguir entre os casos de sinais não-correlacionados, tipo ruído branco (a = 0,5), sinal anti-persistentes (a < 0,5) e sinal persistente (a > 0,5). Usando esta metodologia, foram analisadas 129 curvas de luz de sistemas binários de raios-X, provenientes do banco de dados públicos de observações feitas pelo instrumento All Sky Monitor, a bordo do satélite Rossi X-Ray Timing Explorer (ASM-RXTE). Foram identificadas a presença de a'0,5 em mais de 90% dos sistemas estudados, implicando em dizer que as flutuações de intensidade observadas apresentam correlação de auto-similaridade, sem entretanto, indícios de apresentarem uma escala de tempo característica das flutuações de intensidade. Sistemas onde são observadas erupções (flares), apresentam sistematicamente a > 0,5, característica esta, possivelmente associada com persistência das flutuações de densidade de disco ou taxa de acréscimo de massa. Os sistemas com curvas de luz onde nao são observadas as erupções apresentam uma distribuição normal centrada em a~0,62+/-0,10. Referências ¾ Peng, C.-K., Buldyrev, S.V., Havlin, S., Simons, M., Stanley, H.E., e Goldberg, A.L., Phys. Rev. E, (49), 1685 (1994). ¾ Liu, Y., Gopikrishnan, P., Cizeau, P., Meyer, M., Peng,C.-K., e Stanley, H.E., Phys. Rev. E, (60), 1390 (1999).

Pereira, M. G.; Moret, M. A.; Zebende, G. F.; Nogueira, E., Jr.

2003-08-01

93

La vgtation aquatique est principalement constitue de phanrogames et de  

E-print Network

s épiphytes tels que hydrozoaires,, serpulides, algues, éponges, balanes, qui y vivent sans les parasiter. Ces de mer et les poissons. Epiphytes (algues, éponges, mollusques) Prédateursmobiles Les feuilles sont

94

LES MTHODES DE DOSAGE DES PRINCIPALES VITAMINES HYDROSOLUBLES (1)  

E-print Network

découvert les molécules chimiques des diverses vitamines, acide ascorbique, thiamine, riboflavine, etc, et les résultats de ces méthodes chimz'ques sont exprimés en milligrammes de thiamine, ou riboflavine

Boyer, Edmond

95

Le bissap ( Hibiscus sabdariffa L.) : composition et principales utilisations  

Microsoft Academic Search

Introduction. Hibiscus sabdariffa L. is a herbaceous plant, cultivated largely in tropical and subtropical areas of both hemispheres. This plant is used for its fibre; mainly for its calyx, which is of three types: green, red and dark red. Composition. The red calyxes are the most used and are characterised by their concentration of anthocyanin, which can reach 1.5 g·kg

Mady Cisse; Manuel Dornier; Mama Sakho; Augustin Ndiaye; Max Reynes; Oumar Sock

2009-01-01

96

DIA HORA AULA CURSO TITULACION ASIGNATURA 19/12/2012 12:00 1 Ingeniera Tcnica en Informtica de Sistemas Matemtica Discreta -LAB (-)  

E-print Network

tecnología de Computadores (4) 11/01/2013 15-21 1 Ingeniería Técnica en Informática de Sistemas Fundamentos artificial (8) 20/12/2012 18:00 AIII 207 (98) 3 Ingeniería Técnica en Informática de Sistemas Redes (23) 08

Rey Juan Carlos, Universidad

97

Sesso Especial: Novas Tendncias em Modelagem do Sistema Terrestre (New Trends on Land System Modelling) Coordenadores: Gilberto Cmara (INPE) e Giovana Espindola (IPO-GLP/INPE)  

E-print Network

Sessão Especial: Novas Tendências em Modelagem do Sistema Terrestre (New Trends on Land System múltipla escala, obteremos novas informações sobre os processos que comandam as mudanças do sistema

98

IEE 2310 Sistemas de Potencia 1 Semestre 2007 Fecha de entrega : Da lunes 18 de junio hasta las 18:00 por email a hrudnick@uc.cl.  

E-print Network

mediante el uso del programa computacional PowerWorld1 . El sistema de referencia a simular y sus datos se muestran en la figura, realice un estudio de análisis de fallas utilizando la herramienta computacional estudiantes, que permite analizar sistemas de hasta 12 barras, se encuentra en http://www2.ing.puc.cl/power/education/computacional

Rudnick, Hugh

99

La efectividad de las redes de protección social: El rol de los sistemas integrados de información social en Mexico  

Microsoft Academic Search

Este trabajo forma parte de una serie de estudios realizados en el marco del proyecto “La efectividad de las redes de protección social: el rol de los sistemas integrados de información social”. Los estudios de caso fueron realizados en el período 2007-2008. El enfoque privilegiado en la elaboración de este estudio es más práctico que teórico y más gerencial que

Rogelio Gomez Hermosillo

2011-01-01

100

APUNTES PARA INTRODUCIR EL SISTEMA DE ANÁLISIS DEL DÉFICIT DE CAPACIDAD INSTITUCIONAL EN LA GESTIÓN AMBIENTAL LOCAL  

Microsoft Academic Search

Las tendencias mundiales de afianzamiento de los sistemas democráticos, descentralización política y búsqueda de alternativas de desarrollo sustentable apuntan a los gobiernos locales como actores imprescindibles ¿Están en condiciones de subir a escena? La mayoría de los diagnósticos ambientales, se hacen a partir parámetros o indicadores de deterioro (efectos e impactos), aunque rara vez incluyen una evaluación de la gestión

Alberto E. Morán

2007-01-01

101

PROCEDIMIENTO JERÁRQUICO BASADO EN OPTIMIZACIÓN Y SIMULACIÓN PARA LA GESTIÓN DE VEHÍCULOS EN SISTEMAS AUTOMATIZADOS DE MANUFACTURA  

Microsoft Academic Search

Resumen: este artículo analiza el problema de gestión de demandas de transporte en una fábrica automatizada de producción. El problema tratado está inspirado en una aplicación real en la industria de los semiconductores. La principal diferencia con respecto a trabajos precedentes en la literatura radica en la naturaleza unificada del sistema de transporte, con la cual es posible disminuir el

Jairo Rafael Montoya Torres

102

La efectividad de las redes de protección social: El rol de los sistemas integrados de información social en Brasil  

Microsoft Academic Search

Este trabajo forma parte de una serie de estudios realizados en el marco del proyecto “La efectividad de las redes de protección social: El rol de los sistemas integrados de información social”. Los estudios de caso fueron realizados en el período 2007-08. Se agradecen los comentarios de Amélia Cohn, Lúcia Maria Modesto Pereira y Paulo de Martino Jannuzzi. El texto

Leticia Bartholo; Ricardo Rodrigues Dutra

2011-01-01

103

I use OIT's free anti-virus software to scan my computer at least once every month.  

E-print Network

the hard drive clean before getting rid of my computer. I never leave my laptop and cell phone unattended. Iownandusealaptopsecuritycable. I have registered my laptop and cell phone with the UMass Amherst Police Department (UMPD). I. I choose the UMASS-SECURE1X network when using wireless on campus. I keep track of sensitive data

Schweik, Charles M.

104

Securing PCs and Data in Libraries and Schools: A Handbook with Menuing, Anti-Virus, and Other Protective Software.  

ERIC Educational Resources Information Center

This handbook is designed to help readers identify and eliminate security risks, with sound recommendations and library-tested security software. Chapter 1 "Managing Your Facilities and Assessing Your Risks" addresses fundamental management responsibilities including planning for a secure system, organizing computer-related information, assessing…

Benson, Allen C.

105

Modelizacion, control e implementacion de un procesador energetico paralelo para aplicacion en sistemas multisalida  

NASA Astrophysics Data System (ADS)

Cualquier sistema electronico que incluya un procesado o tratamiento de la senal, y ademas, algun tipo de actuador mecanico generalmente necesita, como minimo, dos tensiones diferentes de alimentacion. Excluyendo los sistemas de alimentacion distribuida, la solucion tecnica mas utilizada para proporcionar dos o mas tensiones consiste en las fuentes de alimentacion multisalida. En una fuente de alimentacion multisalida los diferentes circuitos que conforman cada salida comparten un mismo transformador de potencia optimizando coste, masa, y volumen. Las ventajas obtenidas con este procedimiento tienen en su contra el efecto que sobre cada salida individual provocan las demas en su conjunto debido, principalmente, a los efectos de los elementos parasitos de los componentes. Un cambio de carga en una de las salidas produce un transitorio que es visto por todas las demas como un efecto de impedancia cruzada, y al final del transitorio, la tension de cada salida es diferente respecto a la que tenian antes del transitorio. Este ultimo resultado se conoce como regulacion cruzada. La disminucion de los efectos de la regulacion cruzada ha sido objeto de estudio durante los ultimos anos. El objetivo ha sido el desarrollo de distintas estrategias que permiten, desde disminuir los efectos de la regulacion cruzada hasta los niveles deseables, a eliminarla completamente. El resultado final suele suponer una penalizacion sobre el diseno del sistema directamente proporcional al grado de regulacion a conseguir en las distintas salidas. Entre las soluciones propuestas para eliminar la regulacion cruzada las tecnicas de post-regulacion se han consolidado como la opcion mas aceptada ya que, pueden aplicarse a cualquier convertidor y no suponen ninguna complejidad adicional a la hora de plantear el diseno. En esta Tesis Doctoral se abordara el estudio de la tecnica conocida como postregulacion mediante transformador controlado, que si bien se ha empleado en convertidores resonantes, su modelizacion, y aplicacion en convertidores PWM, esta aun por estudiar y valorar. El primer Capitulo consiste en una breve introduccion al problema de la regulacion cruzada y la impedancia cruzada para posteriormente describir las tecnicas de post-regulacion actualmente mas empleadas, con especial atencion al post-regulador con transformador controlado. El Capitulo segundo trata del estudio de las caracteristicas estaticas del postregulador con transformador controlado. Partiendo de los estudios disponibles sobre el postregulador se plantean mejoras en su modo de actuacion y se discuten tres alternativas diferentes para controlar el transformador. Las dos primeras consisten en emplear un convertidor auxiliar Boost en sus dos modos de funcionamiento, continuo y discontinuo. La tercera consiste en controlar el transformador con una tension PWM directamente, sin filtrado. Finalmente se comprueba experimentalmente, para el estado estacionario, el funcionamiento del post-regulador para cada uno de los tres metodos de control. El Capitulo tercero trata de la dinamica de la salida controlada con el post-regulador cuando este emplea un convertidor auxiliar tipo Boost. Mediante la tecnica de promediado de variables de estado se propone el modelo de pequena senal, tanto para el modo continuo como para el modo discontinuo de funcionamiento del convertidor auxiliar. Los resultados mas significativos de esta seccion son las expresiones analiticas de las impedancias cruzadas y de la impedancia de la salida post-regulada. Como complemento al modelo de pequena senal se plantea un modelo de gran senal implementado sobre el simulador Pspice. Con este nuevo modelo se reproducen los resultados obtenidos con el modelo de pequena senal y ademas es posible simular los transitorios en las tensiones de salida ante cambios de carga. La modelizacion del convertidor cuando el transformador se controla con una tension PWM sin filtrar es el objetivo del Capitulo 4. En las secciones siguientes del Capitulo se plantea el correspondiente modelo de gran senal aplicado a un nuevo prototipo exper

Ferreres Sabater, Agustin

106

Diferencias biométricas entre dos poblaciones de Mirlo Acuático (Cinclus cinclus) en ambas vertientes de sierras del Sistema Central  

Microsoft Academic Search

En aquest treball es realitza una anàlisi de la biometria de la merla d'aigua en dues localitats del Sistema Central. S'analitzen les dades de 19 merles d'aigua de las Cruceras (altitud 880 m, Ávila) i 15 de Galíndez (altitud 1.060 m, Segovia). Els mascles de Galíndez van tenir una ala significativament més llarga que els de las Cruceras. No es

Alfonso Villarán; Juan Pascual-Parra; Eduardo T. Mezquida

2001-01-01

107

MAC 440/5759 -Sistemas de Objetos Distribudos -Primeiro Semestre de 2006 EP 3: Servio de Fachada Baseado na Tecnologia Web Services  

E-print Network

MAC 440/5759 - Sistemas de Objetos Distribuídos - Primeiro Semestre de 2006 EP 3: Serviço de EPs 1 e 2. Naqueles EPs vocês construíram uma aplicação servidora, voltada para vídeo-locadoras, que. A idéia é partir do sistema construído nos EPs 1 e 2 e adicionar a ele novas classes, que implementarão

Reverbel, Francisco

108

# GMV y UVa, 2009 Todos los derechos reservados Sistemas empotrados en flotas de vehculos NUEVOS SERVICIOS DE NAVEGACIN PARA LA CARRETERA MUI-TIC Universidad de Valladolid 9 noviembre 2009 Diego R. Llanos Ferraris Universidad de Valladolid y GMV S.A. Val  

E-print Network

# # # © GMV y UVa, 2009 Todos los derechos reservados Sistemas empotrados en flotas de vehículos SISTEMAS EMPOTRADOS EN FLOTAS DE VEHÍCULOS © GMV y UVa, 2009 CONTEXTO # Sistemas empotrados o VEHÍCULOS © GMV y UVa, 2009 1. Servicios de navegación para la carretera 2. Peaje electrónico basado en GNSS

Llanos, Diego R.

109

Línea de base del Proyecto de producción ecológica, comercialización y asociatividad de las mujeres en el medio rural: Manual del sistema de monitoreo y seguimiento  

Microsoft Academic Search

El Sistema de monitoreo y seguimiento ha sido elaborado especialmente para la organización En las Huellas del Banco Grameen-Loja, cuyo propósito es facilitar el acceso a servicios financieros y técnicos eficientes y sostenibles para mujeres microempresarias del sur ecuatoriano. El manual fue diseñado como un instrumento que sirva de guía para que la dirección ejecutiva y la coordinación del Proyecto

Carlos Palán Tamayo

2009-01-01

110

Explorao do Espao de Projeto em Hw/Sw Co-design de Sistemas Tempo-Real Embarcados Orientados a Objetos: o  

E-print Network

flexibilidade) e hardware (maior desempenho e menor potência) dos componentes e sub-sistemas. O projeto SEEP comportamento temporal e consumo de potência. A metodologia SEEP faz uso intensivo de conceitos de orientação a exploração do espaço de projeto na metodologia definida pelo projeto SEEP usando como exemplo um componente

Wagner, Flávio Rech

111

PUC Sistema de Comunicaes Pessoais para as Redes de Prxima Gerao Alberto Rodrigues Silva, Joo Patriarca, Joo Clemente, Paulo Chainho, Paulo Ferreira  

E-print Network

1 PUC ­ Sistema de Comunicações Pessoais para as Redes de Próxima Geração Alberto Rodrigues Silva para as Redes de Próxima Geração". O artigo tem como principal objectivo apresentar a visão geral do, a substituir as suas redes antigas (analógicas e ou digitais, orientadas fundamentalmente por serviços de voz

da Silva, Alberto Rodrigues

112

Il sistema di crittograa RSA Il teorema di Fermat dice che, se p primo e a mod p 6= 0, allora  

E-print Network

Il sistema di crittogra�a RSA Il teorema di Fermat dice che, se p è primo e a mod p 6= 0, allora ap. Dal teorema di Fermat otteniamo un importante risultato: Se n = p � r con p e r due numeri primi, poniamo (n) = (p - 1)(r - 1) (questa è detta la funzione di Eulero). Dal teorema di Fermat si ottiene che

Catenacci, Roberto

113

Temporal dynamics of Trichodesmium erythraeum (Cyanophyta) in the National Park "Sistema Arrecifal Veracruzano" in the Gulf of Mexico.  

PubMed

Trichodesmium erythraeum Ehrenberg ex Gomont is a microalga worldwide distributed in tropical seas. This filamentous microalga was detected in phytoplankton samples collected in the Protected NaturalArea "Parque Nacional SistemaArrecifal Veracruzano", and because of its ecological importance, its temporal dynamics was studied using net samples (30 microm) collected in one year period. Samples were studied with a light microscope recording the presence, morphological characteristics, life form and relative abundance. Trichodesmium erythraeum occurred as single filaments and was rare in April 2007 and March 2008; as single filaments from May to August and December 2007; as single filaments and small aggregates in September 2007 and January 2008; in aggregates of large size (> 3mm) and high relative abundance in October 2007; and was absence in November 2007 and April 2008. Although the relative abundance of the species was not important comparing with other members of phytoplankton, its occurrence was frequent with a bloom at the beginning of the north winds period. The observed temporal dynamics of this microalga in this coral reef region comes up on the alert in the monitoring red tides programs being implemented in Veracruz coast. PMID:22315818

Aké-Castillo, José A

2011-07-01

114

elementos estruturais sistema modular  

E-print Network

, a UnB desenvolveu este manual de identidade visual, documentando as manifestações visuais de sua marca visual da UnB. Sua forma faz alusão ao projeto urbanístico de Brasília, por meio da representação do comunicação visual, pois possui recursos avançados que só fun- cionam em aplicativos gráficos, não utilizados

Maier, Rudolf Richard

115

Principales lignes structurales du Maroc nord-oriental : apport de la gravimétrie  

NASA Astrophysics Data System (ADS)

The present work is based on various filtered maps (horizontal derivative, upward continuation) and Euler deconvolution of the gravity data from northeastern Morocco. These results allow the delineation of many geological structures, such as faults, basins, or diapirs. Some of these structures are hidden totally or partially by the Mesozoic and Cenozoic cover. The results were used to make a structural map of the study area; this map confirms the existence of several faults, localised or inferred, from former geological studies. It complements information on some of them and outlines a great number of deep or near-surface faults that had remained unknown until the present time. The major features show two principal directions: N080°-085° and N055°-065°, with a predominance of the latter, and their depth can reach 4500 m. The N080°-085° directions correspond to the Kebdana, Sidi Bouhouria, Naima, and Guefait faults, and the N055°-065° directions correspond to a fault parallel to the Mediterranean coast and the Moulouya, Madagh, Angad, and Zekkara faults.

Chennouf, Touria; Khattach, Driss; Milhi, Abdellah; Andrieux, Pierre; Keating, Pierre

2007-05-01

116

Principales resultados del Estudio Nacional de Exámenes de pulmón (NLST): Síntesis  

Cancer.gov

El 4 de noviembre de 2010, el Estudio Nacional de Exámenes de Pulmón dio a conocer resultados iniciales que indican que hubo 20% menos muertes por cáncer de pulmón entre los participantes del estudio evaluados con tomografía computarizada espiral de baja dosis (también conocida como tomografía computarizada helicoidal) que en los participantes que fueron evaluados con radiografías de pecho.

117

vent un abri nocturne, par exemple sous des feuilles. C'est la principale raison pour  

E-print Network

at the fallow site and 112 at the suburban site. The share of endangered species was high- est at the suburban of species, and the great share of endangered species and ecologically specialized species at the urban site in a suburban area of Berlin. Twenty-eight species of aculeata were found at the bee meadow site, 51 species

Boyer, Edmond

118

Mejora docente y adaptacin al Espacio Europeo de Educacin Superior Tabla II. Principales resultados conseguidos  

E-print Network

la Normativa de movilidad de la UPF, introduciendo garantías de calidad para la movilidad saliente al Mundo", para promover la movilidad saliente. Documento 14/12/2011 14. Mejora docente y adaptación componente de movilidad internacional. Web 10/04/2012 15. Mejora docente y adaptación al EEES Realización de

Geffner, Hector

119

enero-marzo2008Cinvestav24 Una de las metas principales de la criptografa  

E-print Network

la condición de que no existan premisas sobre la sofisticación tecnológica o poder computacional del. Aun si su validez fuera probada, tendríamos que adivinar el poder computacional teórico de un intruso de los algoritmos clásicos utilizados en la práctica yacen en la llamada "seguridad computacional", i

Rosas-Ortiz, Jose Oscar

120

Dinámica del sistema agroforestal de chagras como eje de la producción indígena en el Trapecio Amazónico (Colombia) Chagras' agroforestal system dynamics as the basis for indigenous production in the Amazonian Trapezium (Colombia)  

Microsoft Academic Search

Resumen: La tradición indígena, la pertenencia a la cuenca Amazónica y la cercanía a un importante centro urbano como Leticia (Amazonas, Colombia) son factores que aportan elementos característicos al sistema de producción de Ciudad Jitoma y lo dife- rencian de otras formas de producción indígena y no-indígena, incluso dentro de la misma región ama- zónica. En el presente estudio se

Luz Amparo Triana-Moreno; Nohra Cecilia Rodríguez; Jesús García

121

Metamorphic Detection via Emulation A Project Report  

E-print Network

Priyadarshi In parallel with improvements in anti-virus technologies, computer virus writers have developed signatures. Hence, there is a need for a more robust anti-virus technology. To counter metamorphic virus.........................................................................................................................................2 2.1 STEALTH VIRUS

Stamp, Mark

122

Sistemas DinmicosSistemas Dinmicos Marcus A. M. de Aguiar  

E-print Network

dinâmicos DiscretosDiscretos ContínuosContínuos CamposCampos Autômato celularAutômato celular Redes. Rev. E 55, R4869 (1997) Espessura 1mm T = 9 o C #12;5- Modelos atmosféricos #12;7- Autômatos celulares neurais e ritmos cardíacos - teoria de bifurcações- teoria de bifurcações - rotas para o caos- rotas para

de Aguiar, Marcus A. M.

123

How to Keep Your Campus Safe from Infection  

ERIC Educational Resources Information Center

In this article, the author explains how antivirus programs work. He also explains how performances of various antivirus programs vary from one to another. He also takes a look at 13 antivirus programs and explains which of these will keep computers protected. These programs include: (1) Sophos Anti-Virus Version 3.86.2; (2) McAfee VirusScan 9.0;…

Brown, Scott

2005-01-01

124

Tesis Doctoral Sistemas de informacin  

E-print Network

a problemas geoespaciales en la Administración de Tierras Juan Porta Trinidad 2013 Departamento de Electrónica aplicados a problemas geoespaciales en la Administración de Tierras Juan Porta Trinidad Mayo 2013 Dirigida ha sido realizada por Juan Porta Trinidad bajo mi dirección en el Grupo de Arquitectura de

Fraguela, Basilio B.

125

VPN tinklo darbingumo monitoringo sistema.  

E-print Network

??VPN tinkl? monitoringo analiz?. Agento-menedžerio modelio apžvalga. SNMP protokolo analiz? ir panaudojimas. Žvaigžd?s tipo tinlo analiz?. Alternatyvi? sistem? apžvalga ir palyginimas. Suformuoti reikalavimai ir sukurtas… (more)

Venckus,; Almantas

2009-01-01

126

PRINCIPALES CONCEPCIONES TEÓRICAS SOBRE MARKETING DE SERVICIOS: NECESIDAD DEL ESTUDIO Y APLICACIÓN DE LA CALIDAD DE SERVICIO PERCIBIDA  

Microsoft Academic Search

El sector terciario de la economía ha crecido a pasos gigantescos en los últimos años. A nivel mundial, el desarrollo de diferentes empresas que brindan paralelamente los mismos servicios, ha hecho muy notable la competencia entre ellas, por lo que se ha intensificado la puesta en práctica de la tecnología del marketing para lograr diferenciación en el mercado, formar parte

Yelenys Díaz González; Roberto Carmelo Pons García

2009-01-01

127

Integracion espacial del mercado de la carne en las tres principales ciudades de Colombia: Evidencia de las series de precios  

Microsoft Academic Search

En este documento se presenta un estudio sobre la integración espacial de los mercados de carne de res y cerdo, con y sin hueso, pollo despresado y pollo entero, de Bogotá, Medellín y Cali, a partir de datos mensuales entre enero de 1999 y mayo de 2007. Se emplean la prueba de cointegración de Johansen y la prueba no paramétrica

Julio Cesar Alonso; Ana Isabel Gallego

2011-01-01

128

Analisis del contenido curricular de los Documentos Normativos del Programa de Ciencias en el area de biologia para la escuela superior del sistema de educacion publica de Puerto Rico: 1993-2012  

NASA Astrophysics Data System (ADS)

Esta investigacion de naturaleza cualitativa se ocupo de realizar un analisis de contenido documental de los Documentos Normativos del Programa de Ciencias en el area de biologia de la escuela superior del sistema de educacion publica de Puerto Rico del periodo 1993-2012. Los documentos analizados fueron: Guia Curricular, 1995; Marco Curricular, 2003; Estandares de Excelencia, 1996, 2000 y Estandares de Contenido y Expectativas de Grado, 2007. Se indago si hubo cambios en significados en los Componentes Estructurales: Naturaleza de la ciencia, Paradigmas para la ensenanza de la ciencia, Funcion del curriculo formal, Mision de la ensenanza de la ciencia; Contenidos, destrezas y competencias, Estrategias de ensenanza y Evaluacion/Assessment del aprendizaje. El analisis sugiere que no hubo cambios sustanciales en los significados de los Componentes Estructurales. Los documentos estudiados muestran mayormente caracteristicas similares, aunque los documentos mas recientes eran mas descriptivos, explicativos y especificos.

Davila Montanez, Melissa

129

Se identifica una relación entre la falta de exámenes de detección y una gran parte de los casos de cáncer de seno en la etapa avanzada  

Cancer.gov

Los autores de un estudio publicado el 20 de octubre de 2004 en la revista Journal of the National Cancer Institute1? declaran que las dos prioridades principales del sistema de salud deben ser aumentar el porcentaje de exámenes de mamografía e invertir en investigaciones que mejoren la tecnología para detectar el cáncer de seno.

130

Diseño Axial de Combustible para BWRs Usando Redes Neuronales  

Microsoft Academic Search

Resumen En este trabajo se presenta un nuevo sistema de optimización axial de combustible basado en una red neuronal recurrente multiestado llamado RENODC. Se describen con detalle las características principales de este tipo de red neuronal (arquitectura, función de energía y actualización de estados neuronales) y como se adaptó al diseño de ensambles de combustible nuclear. El diseño de combustible

Juan José Ortiz; Alejandro Castillo; José Luis Montes; Raúl Perusquía

2007-01-01

131

Enterprise Information Security Management Framework [EISMF  

E-print Network

There are several technological solutions available in the market to help organizations with information security breach detection and prevention such as intrusion detection and prevention systems, antivirus software, ...

Sharma, Dhirendra, S.M. Massachusetts Institute of Technology

2011-01-01

132

UNIVERSIDADE FEDERAL DO PARAN SISTEMA DE BIBLIOTECAS  

E-print Network

, dicionários, filmes, vídeos, discos, normas técnicas, microformas, partituras, patentes, dentre outros Bibliográficos (anexo 2), fornecendo os dados que permitem identificar com precisão a obra desejada (autor três dólares americanos) por editor/fornecedor, o qual corresponde à taxa cobrada pelo Banco do Brasil

Paraná, Universidade Federal do

133

ANÁLISIS ESTADÍSTICO DE DATOS DE CALIDAD DE AGUA DE LOS POZOS EN LA REGIÓN Y EN LAS PRINCIPALES CIUDADES DEL ACUÍFERO DE IRAPUATO-VALLE, GUANAJUATO, MÉXICO  

Microsoft Academic Search

Resumen - En base a la necesidad de conocer si un evento extraordinario de lluvias en el acuífero de Irapuato Valle afectó la calidad del agua subterránea extraída, se realizó un análisis estadístico a través de pruebas no paramétricas de datos ordenados por rango y de nivel nominal de los parámetros físicos, químicos y bacteriológicos que determinan la calidad del

José de Jesús; Mora Rodríguez; Carlos Gutiérrez Ojeda; Luis González Hita

134

A Descriptive Case Study of a School-Wide Positive Behavior Support (PBS) System in Schools with Principal-Led Planning Teams and Coach-Led Planning Teams  

ERIC Educational Resources Information Center

Managing disruptive behaviors in schools is a high-ranking concern in communities across the country (Rose & Gallup, 2006). Unfortunately, the practice of instituting tougher and more severe consequences for increased discipline problems has not resulted in a decrease of disruptive behavior (Lewis & Garrison-Harrell, 1999; Safran & Oswald, 2003;…

McWilliams, Ellen K.

2011-01-01

135

ESTUDIO SOBRE LA ADOPCIÓN DE VARIEDADES MEJORADAS DE FRIJOL EN LAS PRINCIPALES ZONAS PRODUCTORAS DE FRIJOL DE LA REGIÓN BRUNCA DE COSTA RICA 1  

Microsoft Academic Search

A study on the adoption of improved bean varieties in the main bean producing areas of the Brunca Region in Costa Rica. Three bean varieties were released in Costa Rica during the years 2000-2004 (Bribri, 2000, Cabecar, 2003 and Telire, 2004). The process of production and release of these varieties was conducted through the use of participative breeding (PB) methodology,

Juan Carlos Hernández-Fonseca; Flor Ivette Elizondo-Porras

2006-01-01

136

An Attack Vector for Deception Through Persuasion Used by Hackers and Crakers  

Microsoft Academic Search

We always uses the Anti-virus or Anti- Spyware software to secure our data but still most of our computers are infected by the Malware because we thought computer security as just technical field and anti-virus or firewall only can prevent us. Despite all the technological advancement in security, there is still one attack vector that leaves our network and computer

Mosin I. Hasan; Nilesh B. Prajapati

2009-01-01

137

Asteroidi  

NASA Astrophysics Data System (ADS)

Contents: Parte I: Asteroidi. 1. Introduzione. 2. Dinamica degli asteroidi. 3. Distribuzione degli asteroidi. 4. Proprietà fisiche degli asteroidi. 5. Interrelazioni nel Sistema Solare. Parte II: Le Osservazioni. 6. La pianificazione. 7. Astrometria. 8. Fotometria. Appendici: A. Tempo delle Effemeridi e Tempo Universale. B. Calcolo Effemeridi. C. Guida all'utilizzo del Minor Planet Software rel. 8. D. Determinazione della Coordinate Geografiche di una postazione di osservazione dalle Coordinate Metriche U.T.M. nella principale cartografia italiana.

Foglia, Sergio; Morbidelli, Alessandro; Masi, Gianluca; Carusi, Andrea

2006-10-01

138

Designing security into software  

E-print Network

When people talk about software security, they usually refer to security applications such as antivirus software, firewalls and intrusion detection systems. There is little emphasis on the security in the software itself. ...

Zhang, Chang Tony

2006-01-01

139

NUIT Recommended Practices for Digital Devices Use the checklist below to help you maintain a problem-free computer, tablet, smartphone, or other device.  

E-print Network

. Use a cable lock to protect your laptop or other equipment from theft. Install antivirus software-spyware, firewall, etc.) Productivity suites (i.e. Microsoft Office) Internet browsers iTunes and Quicktime

Shahriar, Selim

140

Encapsulation of Curcumin in O/W Nanoemulsions and Its Bioaccessibility After In Vitro Digestion.  

E-print Network

??The functional ingredient curcumin has a variety of biological and pharmacological actions, such as anti-tumor, anti-inflammatory, anti-virus, anti-oxidant, and anti-HIV properties coupled with low toxicity.… (more)

Ahmed, Kashif

2010-01-01

141

Desafos para los Sistemas de Transmisin ChilenosTransmisin Chilenos  

E-print Network

Aysén Aysén Aysén (Pascua 2.1) Ventanas 3 Guacolda 4 Quinteros GNL Guacolda 3 Los Cóndores �uble San Aysén Aysén Aysén (Pascua 2.1) Ventanas 3 Guacolda 4 Quinteros GNL Guacolda 3 Los Cóndores �uble San

Dixon, Juan

142

Dictamen del Concurso de Ayudante de Segunda Area Sistemas  

E-print Network

, Juan Francisco Gervasoni, Julio G´omez, Leonel Exequiel Heredia Favieri, Martin Ariel Iglesias, Axel Ariel Iglesias, Axel Langberg, Mart´in Ezequiel Laporte, Mat´ias Fern´andez Abrevaya, Victoria Pigretti. Teniendo en cuenta todo lo enunciado anteriormente, y tras haber evaluado los antecedentes docentes, cient

Figueira, Santiago

143

ANALISIS DE LA EVOLUCION DEL SISTEMA BANCARIO NACIONAL  

Microsoft Academic Search

1. INTRODUCCION La intervención de los bancos de Cochabamba y Sur muestra la necesidad de tener algunos parámetros básicos para orientarse sobre la calidad de los bancos, que sea útil para proporcionar elementos de juicio para la toma de decisiones tanto de las instituciones reguladoras, como de las instituciones privadas y el público en general. Existen diversos criterios para clasificar

Eduardo Antelo; Ernesto Cupé Clemente; Jairo Escóbar Llanos; José Abel; Martinez Mrden

144

Instituto de Sistemas e Robotica Polo de Lisboa  

E-print Network

Introduction 1 2 Dynamic reorganization and business modelling 3 3 The Mars Pathfinder mission data 6 4 The Mars Pathfinder mission reference model 8 5 Dynamic reorganization in the Pathfinder mission 9 5 in a simplified version of the Mars Pathfinder mission, using, exclusively, public domain data. Keywords: Business

145

Inundaciones recurrentes, sistemas de informacin geogrfica y teledeteccin  

E-print Network

, donde el agua sobrepasó los contadores eléctricos #12;Los contadores de luz en esta comunidad de Cachete unas lluvias de varias horas en una zona "no inundable" luego de la construcción de una urbanización en

Gilbes, Fernando

146

POSGRADO EN SMART MOBILITY: Sistemas Inteligentes de Transporte  

E-print Network

movilidad y a su gestión. Los dos siguientes se centran en el estudio de las tecnologías que se utilizan en los diferentes segmentos de la la gestión dinámica de la movilidad, de las infraestructuras de- ducción automática. Se analiza también de forma individualizada la movilidad en las diferentes etapas del

Politècnica de Catalunya, Universitat

147

Ozka grla sistema odprtega dostopa: glasovi iz sveta  

E-print Network

s spletne strani: http://apps.ams.usda.gov/fooddeserts/ foodDeserts.aspx 92 Elisa Bonaccorso [et al.]: Bottlenecks in the Open-Access System: Voices from Around the Globe, 77–92 Library, 58 (2014) 3 prof. marc l. greenberg University of Kansas, Slavic...

Bonaccorso, Elisa; Božankova, Reneta; Cadena, Carlos D.; ?apská , Veronika; Czerniewicz, Laura; Emmett, Ada; Oludayo, Folorunso F.; Gluhova, Natalija; Greenberg, Marc L.; Hladnik, Miran; Grillet, Marí a E.; Indrawan, Mohamad; Klejner; Kapovi?, Mate; Klejner, Jurij A.; ?azi?ski, Marek; Loyola, Rafael D.; Menon, Shaily; Morales, Luis G.; Ocampo, Clara; Pé rez-Emá n, Jorge; Peterson, A. Townsend; Poposki, Dimitar; Rasheed, Ajadi A.; Rodrí guez-Clark, Kathryn M.; Rodrí guez, Jon P.; Rosenblum, Brian; Sá nchez-Cordero, Victor; Smolí k, Filip; Snoj, Marko; Szilá gyi, Imre; Torres, Orlando; Tykarski, Piotr

2014-12-01

148

www.biblio.polimi.it Il Sistema bibliotecario  

E-print Network

utilizzazione economica, che durano per tutta la vita dell'autore e fino a 70 anni dalla sua morte. I diritti un'opera a stampa solo dopo 70 anni dalla morte dell'autore, oppure se vi è un'autorizzazione scritta

149

Sistemas Distribudos com Redes de Sensores sem Fio  

E-print Network

· colaboração · email · jogos · distribuição de conteúdo · acesso uniforme a recursos · single científicas · correio eletrônico · jogos · ... u relação com escalabilidade #12;estudo de SDs

Rodriguez, Noemi

150

Virus Information Database  

NSDL National Science Digital Library

Symantec Corporation's AntiVirus Research Center has recently released a virus information database that includes over 10,000 computer viruses. The searchable and browseable database can include information about aliases for each virus, infection length, area of infection, likelihood of infection, region reported, characteristics, target platform and target date, in addition to a brief description of how the virus works. The site also provides a basic tutorial on viruses. Symantec, under the Norton name, produces several anti-virus products.

151

ACORDO SOBRE A IMPLANTACIN DUN SISTEMA DE ADMISIN ADICIONAL PARA O ACCESO AO SISTEMA UNIVERSITARIO DE GALICIA DOS ESTUDANTES  

E-print Network

, a Secretaría General de Universidades do Ministerio de Educación, Cultura y Deporte, emitiu no mes de xaneiro Ministerio de Educación, Cultura e Deporte ditou, o pasado 1 #12;3 de abril do 2014, unha segunda "nota

Fraguela, Basilio B.

152

Los Pigmentos Vegetales y la Fotosíntesis  

NSDL National Science Digital Library

En esta lección se examinarán las dos principales clases de pigmentos fotosintéticos: las clorofilas y los carotenoides. Se analizarán sus estructuras bioquímicas y su biosíntesis, y se explicará además la organización de estos pigmentos en los sistemas fotosintéticos, que son complejos proteicos que colectan y convierten la energía luminosa en energía química.

153

Intramolecular hydrogen bonds in the phenylazomethine biomolecules  

NASA Astrophysics Data System (ADS)

The FTIR spectra of the solutions of biologically active molecules (screened phenylazomethines) in CCl4 are studied. The role of the OH- and N=C groups in the formation of the intramolecular H bonds is analyzed. The analysis of the FTIR spectra shows that three types of H bonds (O-H…O-H, O-H…N=C, and O-H…O-H…N=C) are possible in the molecules under study. A correlation of the H-bond formation in the phenylazomethine molecules and the antivirus properties of such molecules is revealed. The antivirus activity is observed for molecules that exhibit intramolecular O-H…O-H…N=C bonds in the absence of free hydroxyls. The antivirus activity decreases when the molecule contains additional OH groups that are not involved in H bonds.

Tolstorozhev, G. B.; Bel'kov, M. V.; Skornyakov, I. V.; Shadyro, O. I.; Ksendzova, G. A.; Sorokin, V. L.

2014-07-01

154

Security Risks and Modern Cyber Security Technologies for Corporate Networks  

E-print Network

This article aims to highlight current trends on the market of corporate antivirus solutions. Brief overview of modern security threats that can destroy IT environment is provided as well as a typical structure and features of antivirus suits for corporate users presented on the market. The general requirements for corporate products are determined according to the last report from av-comparatives.org [1]. The detailed analysis of new features is provided based on an overview of products available on the market nowadays. At the end, an enumeration of modern trends in antivirus industry for corporate users completes this article. Finally, the main goal of this article is to stress an attention about new trends suggested by AV vendors in their solutions in order to protect customers against newest security threats.

Gharibi, Wajeb

2011-01-01

155

Relatividad Especial o General?  

E-print Network

RESUMEN: En este trabajo se explican los principales errores conceptuales que se fueron introduciendo secuencialmente en el desarrollo de la Teoría Especial de la Relatividad (SR). Se da una deducción simple de las Transformaciones de Lorentz y se resalta cómo una configuración rígida, repetida por más de cien años, conduce al primer error de una cadena, al declararse que las componentes transversales al movimiento, en el sistema de referencia inercial móvil, no se afectan desde un punto de vista relativista, y en base a un presunto “postulado de isotropía “ se asumen iguales a las medidas en el sistema inercial considerado fijo. Ello conduce a que dichas transformaciones sean igualmente erradas. Haciendo uso de la configuración general de un movimiento inclinado del sistema inercial móvil, respecto ejes coordenados paralelos, se obtienen resultados correctos de las transformaciones de distancia, tiempo y velocidad, que se han dado en llamar Transformaciones Vectoriales de Lorentz (VLT). Con base a estas primeras correcciones dentro de los fundamentos de la SR son definidas la Transformaciones Locales de Lorentz (LLT) lo cual permitió a su vez definir más completos los conceptos tanto de tiempo local como de magnitudes físicas locales. El primer error indicado dentro de la SR condujo indirectamente a obtener una errónea definición del concepto de masa

Relatividad Vectorial Versus; J A Franco-rodríguez

156

Incentivos para atraer y retener personal de salud de zonas rurales del Perú: un estudio cualitativo  

PubMed Central

El objetivo fue identificar incentivos de atracción y retención en zonas rurales y distantes de Ayacucho, Perú. Fueron realizadas entrevistas en profundidad con 80 médicos, enfermeras, obstetras y técnicos (20 por grupo) de las zonas más pobres y con 11 funcionarios. No existen políticas sistemáticas de atracción y retención de personal de salud en Ayacucho. Los principales incentivos, en orden de importancia, fueron mejoras salariales, oportunidades de formación y capacitación, estabilidad laboral y nombramiento, mejoras en infraestructura y equipos, e incremento del personal. Se mencionaron también mejoras en la vivienda y alimentación, mayor cercanía con la familia y reconocimiento por el sistema de salud. Existen coincidencias y singularidades entre los distintos grupos sobre los incentivos clave para estimular el trabajo rural, que deben considerarse al diseñar políticas públicas. Las iniciativas del Estado deben comprender procesos rigurosos de monitoreo y evaluación, para asegurar que las mismas tengan el impacto deseado. PMID:22488318

Huicho, Luis; Canseco, Francisco Díez; Lema, Claudia; Miranda, J. Jaime; Lescano, Andrés G.

2014-01-01

157

Application of Artificial Neural Networks Techniques to Computer Worm Detection  

Microsoft Academic Search

Detecting computer worms is a highly challenging task. Commonly this task is performed by antivirus software tools that rely on prior explicit knowledge of the worm's code, which is represented by signatures. We present a new approach based on Artificial Neural Networks (ANN) for detecting the presence of computer worms based on the computer's behavioral measures. In order to evaluate

Dima Stopel; Zvi Boger; Robert Moskovitch; Yuval Shahar; Yuval Elovici

2006-01-01

158

AA 2006/2007 Performance Evaluation August 30, 2007 Solution time: 3 hours  

E-print Network

in turn, enhances the value of the exam. The results will be available on the course site at the latest option performs better and explain why. Exercise 3 Personal Computers (PCs) can be infected by viruses. Using an antivirus software the infection can be prevented (if the PC was not infected) or solved (if

Lo Cigno, Renato Antonio

159

Detecting Virus Mutations Via Dynamic Matching Min Feng Rajiv Gupta  

E-print Network

Detecting Virus Mutations Via Dynamic Matching Min Feng Rajiv Gupta CSE Dept., University, the virus developers are employing obfuscation techniques to create mutating viruses. The current antivirus software can- not handle the obfuscated viruses well since its detection methods that are based upon static

Gupta, Rajiv

160

ITL BULLETIN FOR MAY 2011 USING SECURITY CONFIGURATION CHECKLISTS AND THE NATIONAL  

E-print Network

, accurate, safe, and secure operations. Cyber attacks have become more frequent, widespread, and potentially such as email clients, Web browsers, word processors, personal firewalls, and antivirus software; infrastructure devices such as routers, firewalls, virtual private network (VPN) gateways, intrusion detection systems

161

Global Mapping of Cyber Attacks Ghita Mezzour, L. Richard Carley, Kathleen M. Carley  

E-print Network

Global Mapping of Cyber Attacks Ghita Mezzour, L. Richard Carley, Kathleen M. Carley October 2014. The cyber-attack data used in the paper is accessible through the WINE infrastructure using reference WINE;Keywords: intrusion detection, anti-virus, socio-technical factors, cyber security, empirical study #12

162

Cyber-Security week is coming up during the week of October 13, thru October 17, 2008. This year the Residence Hall Association is sponsoring a poster contest to educate and  

E-print Network

Cyber-Security week is coming up during the week of October 13, thru October 17, 2008. This year the Residence Hall Association is sponsoring a poster contest to educate and bring awareness of cyber/emails · Global cyber crime · Physical security · Security updates, antivirus software, firewalls · Effective

Ray, David

163

JStill: Mostly Static Detection of Obfuscated Malicious JavaScript Code  

E-print Network

JStill: Mostly Static Detection of Obfuscated Malicious JavaScript Code Wei Xu Department University University Park, PA szhu@cse.psu.edu ABSTRACT The dynamic features of the JavaScript language the detection of anti-virus software. To defend against ob- fuscated malicious JavaScript code, in this paper we

Zhu, Sencun

164

The Power of Obfuscation Techniques in Malicious JavaScript Code: A Measurement Study  

E-print Network

The Power of Obfuscation Techniques in Malicious JavaScript Code: A Measurement Study Wei Xu University, University Park Email:{wxx104, fuz104, szhu}@cse.psu.edu Abstract JavaScript based attacks have rely on anti-virus software to protect themselves from malicious JavaScript code, attackers exploit

Zhu, Sencun

165

Bibliography of L.M. Liebrock Journal Papers  

E-print Network

", Journal of Digital Forensics Practice, V2, N4, pp. 196-208, 10.1080/15567280903140953, October, 2008. 5. MBibliography of L.M. Liebrock Journal Papers 1. D. Quist and L.M. Liebrock, "Reversing Compiled. Neil, "Improving Antivirus Accuracy with Hypervisor Assisted Analysis", Journal of Computer Virology

Liebrock, Lorie M.

166

RiskRanker: scalable and accurate zero-day android malware detection  

Microsoft Academic Search

Smartphone sales have recently experienced explosive growth. Their popularity also encourages malware authors to penetrate various mobile marketplaces with malicious applications (or apps). These malicious apps hide in the sheer number of other normal apps, which makes their detection challenging. Existing mobile anti-virus software are inadequate in their reactive nature by relying on known malware samples for signature extraction. In

Michael Grace; Yajin Zhou; Qiang Zhang; Shihong Zou; Xuxian Jiang

2012-01-01

167

04/16/2007 11:56 AMMore Females Because Sisters Kill Their Brothers -Not such an altruistic behavior in parasitoid wasps -Softpedia Page 1 of 2http://news.softpedia.com/news/More-Females-Because-They-Kill-Male-Offspring-51802.shtml  

E-print Network

Online Enjoy over 2500 Channels on your PC TV Shows, News, Movies, Sports visit site > Bit..signup free Trade the world markets today! www.gnutrade.com Ads by Google - Advertise on this site MoreDefender Antivirus Guaranteed detection and removal of all viruses. PC World Best Buy! visit site > SIPfoundry A Free

Gardner, Andy

168

Safe Computing: An Overview of Viruses.  

ERIC Educational Resources Information Center

A computer virus is a program that replicates itself, in conjunction with an additional program that can harm a computer system. Common viruses include boot-sector, macro, companion, overwriting, and multipartite. Viruses can be fast, slow, stealthy, and polymorphic. Anti-virus products are described. (MLH)

Wodarz, Nan

2001-01-01

169

How To: Protect against a Zero-Hour Attack  

ERIC Educational Resources Information Center

In the last year, a series of viruses and worms that caused damage across the Internet in record time has made very clear how vulnerable computer systems are. The MS Blaster, Slammer, Sasser, and Korgo.W worms have shown that signature-based antivirus software and traditional firewalls are not enough to protect networks. Everyone is worried about…

McCarthy, Rob

2005-01-01

170

Profiling and accelerating string matching algorithms in three network content security applications  

Microsoft Academic Search

The efficiency of string matching algorithms is essential for network con- tent security applications, such as intrusion detection systems, anti-virus sys- tems, and Web content filters. This work reviews typical algorithms and profiles their performance under various situations to study the influence of the number, the length, and the character distribution of the signatures on performance. This profiling can reveal

Po-ching Lin; Zhi-xiang Li; Ying-dar Lin; Yuan-cheng Lai; Frank C. Lin

2006-01-01

171

Standard software installations Standard software, as listed below, is installed free of charge on all University of Aberdeen supplied PCs and Windows laptops.  

E-print Network

Standard software installations Standard software, as listed below, is installed free of charge with Microsoft Windows 7 64-bit Enterprise Edition as standard. Software Name Description 7-Zip Used to open transfer Microsoft Security Centre Endpoint Protection (SCEP) 2012 Anti-virus software for University

Pym, David J.

172

Lock Your Computer Screen Before Leaving Your Desk  

E-print Network

Lock Your Computer Screen Before Leaving Your Desk Locking your computer's screen is an easy and effective step to take to protect the information on your computer system while it's unattended. Create Virus Protection Computers are infected with a virus more often than most people. Make sure antivirus

California at Santa Barbara, University of

173

BotFinder: Finding Bots in Network Traffic Without Deep Packet Inspection  

E-print Network

information from infected machines, and perform distributed denial-of-service attacks. Many approaches to bot- Flow information of a large ISP that contains more than 25 billion flows. Our results show-based malware detection, such as anti-virus scanners, network-based bot detection approaches are increasingly

Vigna, Giovanni

174

Student Computing Support Computing @ The  

E-print Network

the Military Star credit card to make your purchase. Normally, free shipping applies to other credit cards, scanners and laser printers Application and antivirus software High-speed Internet access Extensive Information Resources * Comes with Junk Mail filtering #12;Student Computing Support June 2010 Campus

Young, Paul Thomas

175

An artificial immune system architecture for computer security applications  

Microsoft Academic Search

With increased global interconnectivity, reliance on e-commerce, network services, and Internet communication, computer security has become a necessity. Organizations must protect their systems from intrusion and computer-virus attacks. Such protection must detect anomalous patterns by exploiting known signatures while monitoring normal computer programs and network usage for abnormalities. Current antivirus and net- work intrusion detection (ID) solutions can become overwhelmed

Paul K. Harmer; Paul D. Williams; Gregg H. Gunsch; Gary B. Lamont

2002-01-01

176

Non-normalizable Functions: A New Method to Generate Metamorphic Malware  

E-print Network

Non-normalizable Functions: A New Method to Generate Metamorphic Malware Rodney Owens SIS Dept identify the metamorphic viruses oriented from the same base, anti-virus software has adopted the code. In this paper, we introduce a new technique of generating metamorphic viruses by embedding complicated

Wang, Weichao

177

Framework for Zombie Detection Using Neural Networks  

Microsoft Academic Search

One of the most important threats to personal and corporate Internet security is the proliferation of zombie PCs operating as an organized network. Zombie detection is currently performed at the host level and\\/or network level, but these options have some important drawbacks: antivirus, anti-spyware and personal firewalls are ineffective in the detection of hosts that are compromised via new or

Paulo Salvador; Ant ´ onio Nogueira; U. Franca; R. Valadas

2009-01-01

178

Science and Technology Resources on the Internet: Computer Security.  

ERIC Educational Resources Information Center

Discusses issues related to computer security, including confidentiality, integrity, and authentication or availability; and presents a selected list of Web sites that cover the basic issues of computer security under subject headings that include ethics, privacy, kids, antivirus, policies, cryptography, operating system security, and biometrics.…

Kinkus, Jane F.

2002-01-01

179

Page 1 of 3 Radiogram No. 9377u Form 24 for 06/04/2012  

E-print Network

Auxiliary Laptop Anti-Virus Update 08:15-09:55 FE-2 SM Ventilation System Preventive Maintenance. Group 1 08 Alignment Guide Removal 08:05-08:25 FE-3 Work Prep 08:15-08:20 CDR MRM1 Comm Config 08:15-08:45 FE-1 Potok Air Purification System Interference Measurements. Tagup with specialists (S-band, VHF) 14

180

Hunting for Undetectable Metamorphic Viruses A Project Report  

E-print Network

- 1 - Hunting for Undetectable Metamorphic Viruses A Project Report Presented to The Faculty Metamorphic Viruses by Da Lin Commercial anti-virus scanners are generally signature based, that is, they scan for known patterns to determine whether a file is infected by a virus or not. To evade signature

Stamp, Mark

181

Computer Viruses: Pathology and Detection.  

ERIC Educational Resources Information Center

Explains how computer viruses were originally created, how a computer can become infected by a virus, how viruses operate, symptoms that indicate a computer is infected, how to detect and remove viruses, and how to prevent a reinfection. A sidebar lists eight antivirus resources. (four references) (LRW)

Maxwell, John R.; Lamon, William E.

1992-01-01

182

Reuters, 2004.11.09: "Worm breaks speed record from discovery  

E-print Network

on Tuesday which broke the speed record from the announcement of a security vulnerability in Microsoft exploiting the weakness was developed and set loose, several virus-trackers reported. #12;"Microsoft said and infects the computer,' said technical consultant Graham Cluley at Sophos Anti-Virus. #12;"Microsoft

Bernstein, Daniel

183

DESARROLLO DE UN SISTEMA SENSORIAL PARA LA ASISTENCIA A LA CONDUCCIÓN DE UNA SILLA DE RUEDAS  

Microsoft Academic Search

The University of Los Andes and the group of robotics specifically come working already does some time on a first prototype from wheelchair, with which great experience in subjects has been acquired such as: construction and control of movable platforms, signal processing sent by systems sonars, atmosphere recognition, navigation and voice recognition, subjects that reunited serve as a solid base

Ingeniería Electrónica; Jaime Andrés; Alain Gautier

184

Suporte `a computac~ao orientada aos grupos em sistemas distribuidos tolerantes a faltas  

E-print Network

redes de grande escala geogr´afica. Estas redes destinguem-se das redes locais principalmente pelas suas desempenho aceit´avel sobre este tipo de redes. A grande maioria das redes de grande-escala hoje existentes s~ao constitu´idas por aglomerados de redes locais interligados por redes ponto-a-ponto. Para oferecer comunicac

Rodrigues, Luís E.T.

185

Investigacion Participativa y Gestion de Sistemas Educativos. (Participatory Research and the Management of Educational Systems).  

ERIC Educational Resources Information Center

Elements which, when put in harmony, might generate powerful tools for social change and educational development are (1) the ever present need of the educational systems to evaluate their performance; (2) the universal acceptance of the life-long education concept as a major guideline to design educational programs; (3) the trend toward a…

Valle, Victor M.

186

Comparación de la atención del parto normal en los sistemas hospitalario y tradicional  

Microsoft Academic Search

Objective. To compare vaginal delivery hospital and tradi- tional care systems to identify resources and practices, as well as maternal and neonatal complications related to each system. Material and Methods. Between 1989 and 1990, a cross-sectional study was conducted in three hospitals of Merida City and four municipalities of the state of Yucatan. The study sample consisted of 205 women

Rosa María Méndez-González; María Dolores Cervera-Montejano

2002-01-01

187

Gender and academic career trajectories in Spain : From gendered passion to consecration in a Sistema Endogámico?  

Microsoft Academic Search

Purpose – The purpose of this research is to illuminate the processes that give rise to gendered career pathways in Spanish academia, tracing how individuals might move from academic “passion” to academic “consecration” in a setting in which both visible and veiled discrimination persist. By examining academics' testimony, the paper aims to explore the production and reproduction of complex dynamics

Susana Vázquez-Cupeiro; Mary Ann Elston

2006-01-01

188

Importancia de los recursos genéticos de la agrobiodiversidad en el desarrollo de sistemas de producción sostenibles  

Microsoft Academic Search

Colombia is a megadiverse country, from the viewpoint of genetic diversity, with ample ecosystem variability, which can be employed for the development of sustainable production systems, efficient and competitive. This means, besides conservation of strategic genetic resources of plants, animals and microorganisms, to know the potential of this agrobiodiversity for its ample utilization, with the support of conventional procedures and

2008-01-01

189

Agroecología y Decrecimiento. Una alternativa sostenible a la configuración del actual sistema agroalimentario español  

Microsoft Academic Search

La manera en que se satisface el metabolismo endosomático de los ciudadanos no figura como una de las actuaciones prioritarias en los programas de decrecimiento sostenible. Ello se debe a la identificación que se hace de dicho metabolismo con las actividades agrarias y su reducido impacto sobre el consumo total de energía. Sin embargo, si se va más allá de

Manuel González de Molina; Juan Infante Amate

2010-01-01

190

Las micro-finanzas en Indonesia y el sistema de unidad BRI: Caso del Banco Rakyat  

Microsoft Academic Search

Indonesia tiene una historia de un siglo en proyectos de micro finanzas, que va desde el establecimiento del Badan Kredit Desa (instituciones de crédito comunitario) en 1898, hasta el presente, con una gran variedad de instituciones formales y semiformales de micro-crédito rural a nivel comunitario. A pesar del éxito de esas instituciones de micro finanzas, para sostener sus operaciones con

Sumantoro Martowijoyo

2001-01-01

191

Sistemas Eolicos Pequenos para Generacion de Electricidad: Una guia para consumidores en Nuevo Mexico  

SciTech Connect

This Spanish version of the popular Small Wind Electric Systems: A New Mexico Consumer's Guide provides consumers with information to help them determine whether a small wind electric system can provide all or a portion of the energy they need for their home or business based on their wind resource, energy needs, and economics. Topics include how to make a home more energy efficient, how to choose the correct turbine size, the parts of a wind electric system, how to determine whether enough wind resource exists, how to choose the best site for a turbine, how to connect a system to the utility grid, and whether it's possible to become independent of the utility grid using wind energy. In addition, the cover of the guide contains a list of contacts for more information.

Not Available

2007-09-01

192

Sistemas Eólicos Pequeños para Generación de Electricidad: Una guia para consumidores en Nuevo México  

SciTech Connect

This Spanish version of the popular Small Wind Electric Systems: A New Mexico Consumer's Guide provides consumers with information to help them determine whether a small wind electric system can provide all or a portion of the energy they need for their home or business based on their wind resource, energy needs, and economics. Topics include how to make a home more energy efficient, how to choose the correct turbine size, the parts of a wind electric system, how to determine whether enough wind resource exists, how to choose the best site for a turbine, how to connect a system to the utility grid, and whether it's possible to become independent of the utility grid using wind energy. In addition, the cover of the guide contains a list of contacts for more information.

Not Available

2005-10-01

193

Sistemas Eolicos Pequenos para Generacion de Electricidad; Una guia para consumidores en los EE.UU.  

SciTech Connect

This Spanish version of the popular Small Wind Electric Systems: A U.S. Consumer's Guide provides consumers with information to help them determine whether a small wind electric system can provide all or a portion of the energy they need for their home or business based on their wind resource, energy needs, and economics. Topics include how to make a home more energy efficient, how to choose the correct turbine size, the parts of a wind electric system, how to determine whether enough wind resource exists, how to choose the best site for a turbine, how to connect a system to the utility grid, and whether it's possible to become independent of the utility grid using wind energy. In addition, the cover of the guide contains a list of contacts for more information.

Not Available

2007-09-01

194

IMPACTO DE COSTOS AMBIENTALES EN EL DESPACHO DEL SISTEMA INTERCONECTADO CENTRAL  

E-print Network

un efecto ambiental global (efecto invernadero) y efectos locales como lluvia ácida, reducción de) vertimiento de aguas, que son utilizadas en el proceso de enfriamiento, por lo que se encuentran a altas

Catholic University of Chile (Universidad Católica de Chile)

195

DEGRADACIÓN FÍSICA Y QUÍMICA DE UN HAPLUSTOL TÍPICO BAJO DISTINTOS SISTEMAS DE MANEJO DE SUELO  

Microsoft Academic Search

In the province of Tucumán there was a great process of expansion of the farming borders to dry sub humid and semi- arid areas. This process led to the physical, chemical and biological degradation of the soils. The objective of this work was to determine the long term effects of different tillage systems on physical and chemical degradation of a

GERARDO AGUSTÍN SANZANO; ROBERTO DANIEL CORBELLA; JOSÉ RAMÓN GARCÍA; GUILLERMO SALVADOR FADDA

196

Sintesis y caracterizacion de portadores magneticos coloidales. Aplicaciones al diseno de sistemas de liberacion de farmacos  

NASA Astrophysics Data System (ADS)

The present work is mainly dedicated to the synthesis and characterization of composite colloidal particles with a magnetic core (magnetite) and a polymeric biodegradable material shell (poly(DL-lactide), PLA). The aim is to use them as drug carrier systems in the field of controlled (or modified) release. The appropriate synthesis conditions are analyzed for such purpose, starting with the synthesis of the magnetic nuclei, and continuing with that of microspheres of the polymer used later as shell material. The final step is the manufacture of the composite colloids. In order to have a good comparison, all the experiments of the work have been run in triplicate, that is, for the three individual materials (magnetic nuclei, PLA and composite particles magnetite/PLA) and all the discussions are presented by way of parallel study of the three colloidal systems. The following surface and bulk properties have been studied: shape and size of the particles, specific surface area, chemical composition. The magnetic behavior of the nuclei is characterized, as well as that of the composite particles, through measurement of the magnetic susceptibility and the hysteresis cycles. In addition, a study of the electrokinetic behavior of the systems as a function of pH---at constant ionic strength---has been complemented by an investigation of their surface thermodynamics to check the extent of coverage achieved. Very significant results were also obtained in the analysis of the stability of the suspensions. Since our final aim was the design of a drug carrier and controlled release system, we also present a series of preliminary results concerning the effect of the glucocorticoid betamethasone 21-phosphate sodium salt on the surface electrical properties of the three kinds of particles, observing clear differences between the behavior of magnetite particles and of composite or pure polymeric colloids. It is demonstrated that the polymer layer affects considerably the capacity of the colloid for adsorbing this drug and, probably, other drugs of interest in the treatment of those pathologies in which one needs an elevated local concentration of any therapeutic product but without adverse side effects, like those used in the chemotherapy of the solid tumors.

Gomez Lopera, Salvador Angel

2003-10-01

197

[Distribution and taxonomy of Pyrgophorus platyrachis (Caenogastropoda: Hydrobiidae) in the Sistema de Maracaibo, Venezuela].  

PubMed

The presence of a microgastropod identified as Potamopyrgus sp. was detected previously in the Maracaibo System; nevertheless, a detailed morphological analysis identified this snail in other genera. The objective of this work is to update the distribution and taxonomy of Pyrgophorus platyrachis in the Maracaibo System, Venezuela in samples obtained between 2001 and 2009. The presence of hundreds of individuals of P. platyrachis were observed in the estuary, indeed in the localities of the Gran Eneal lagoon (4 111 snails), Peonías lagoon (229 snails), Punta Capitán Chico (758 snails), San Francisco (2 517 snails), Curarire (240 snails), Apon River mouth (173 snails), Ojeda City (240 snails), Bachaquero (128 snails) and Tomoporo de Agua (385 snails). We performed a taxonomical analysis, and emphasized in ecological aspects, such as the distribution of the species and habitat features, as near vegetation and type of associated sediment. We found three morphotypes of the species, one smooth, another with spiral striations and the other with spines. Smooth morphotype was exclusive of the Gran Eneal lagoon, Peonías lagoon, Punta Capitan Chico and Apon River mouth localities, whereas the other two morphotypes were found together in the remaining localities. According to our detailed anatomical and taxonomical analysis we propose a synonymy between P. platyrachis and the other species described like Pyrgophorus parvulus and Pyrgophorus spinosus. PMID:22017122

Nava, Mario; Severeyn, Héctor; Machado, Nakary

2011-09-01

198

Estudo da IEC 61850 e o seu impacto no sistema de automação de subestações.  

E-print Network

??In current Substation Automation System, digital equipaments called IED (Intelligent Electronic Devices) are used with protection, automation and measurement functions incorporated. These devices, to exchange… (more)

Gilberto Igarashi

2008-01-01

199

Programa de Doctorado en Informtica Avanzada Sistema de Garanta de Calidad  

E-print Network

de un tutor a cada alumno. Movilidad del estudiante. Orientación profesional, principalmente a través los programas de movilidad y de sus resultados. Los mecanismos por los que obtienen la información obtención de información relativa a la movilidad y resultados de la misma se obtiene mediante entrevista con

Escolano, Francisco

200

BALANCE DE FASES MULTIOBJETIVO EN SISTEMAS DE DISTRIBUCIÓN Multiobjective Phase Balancing in Distribution Systems RESUMEN  

Microsoft Academic Search

A distribution systems phase balancing algorithm is presented; it uses a multiobjective model which permits minimize active power loss but the quantity changes which have been done in the system. The optimization methodology is a Non Dominated Elitist Genetic Algorithm in its second version. Methodology and model were tested in a test system of the international literature.

CARLOS ADRIÁN CORREA; RICARDO ANDRÉS BOLAÑOS; ALEJANDRO GARCÉS RUIZ; Ingeniero Electricista

2007-01-01

201

Survey of Financial Systems of the Americas = Encuesta de Sistemas Financieros  

NSDL National Science Digital Library

The Inter-American Development Bank (IADB) has carried out the Survey of Financial Systems to provide "decision makers with information regarding the structure and level of development of the national financial systems of the Western Hemisphere." The Survey strives to provide information about the region's "financial institutions, instruments, law and regulatory oversight." The questions for the survey and information about how the survey is carried out can be found at the site. The data for the Survey is also available for download as an SPSS 7.5 data file.

1997-01-01

202

Morfologia do sistema reprodutor masculino da preguiça-de-coleira (Bradypus torquatus, Illiger, 1811).  

E-print Network

??Os Bichos-Preguiça são mamíferos (Classe Mammalia) da ordem Xenarthra (ou Edentata) Utilizamos nesta pesquisa preguiças-de-coleira (Bradypus torquatus) sendo seis machos e uma fêmea de diferentes… (more)

Daniele dos Santos Martins

2003-01-01

203

Emisión H? en sistemas binarios cromosféricamente activos (RS CVn y BY Dra)  

NASA Astrophysics Data System (ADS)

We report here high and medium resolution Balmer H? line profiles for 11 chromospherically active binary systems including the class of RS Canum Venaticorum binaries (RS CVn) and BY Draconis (BY Dra) with a total range of rotation periods from 0.8 to 24 days. We have obtained different types of H? line profiles: strong emission line, weak emission line with strong superposed absorption profile and filled-in absorption line profile. We have measured the H? equivalent width of the program stars and the H? core emission was determined by subtraction of the equivalent width of a presumably inactive star with the same spectral type and luminosity class.

Fernández-Figueroa, M. J.; Montes, D.; de Castro, E.

1992-05-01

204

Sistemas de expresión para proteínas terapéuticas recombinantes Expression Systems for Therapeutic Recombinant Proteins  

Microsoft Academic Search

Several biopharmaceutical products based on recombinant proteins are manufactured at present by biopharma- ceutical industry. Expression systems to obtain biopharmaceuticals are based on cloning vectors of genes coding for the protein of interest into a suitable host cell such as bacteria, yeast and cellular lines derived from mammals. Several biopharmaceuticals such as clotting factors, hormones, cytokines and enzymes have been

Maria Elisa Drago Serrano

205

Análise florística e estrutural de sistemas agroflorestais das várzeas do rio Juba, Cametá, Pará1  

Microsoft Academic Search

This study analyzed the floristic composition and the structure of traditional agroforestry systems (SAF) in the floodplains of the river Juba, Cametá, Pará. The survey was made on seven plots of 0.25 ha (50 m x 50 m). Each plot was divided into 25 sub-plots of 10 m x 10 m. The species were classified in types of use and

Roberto Miranda; Manoel Malheiros TOURINHO

2004-01-01

206

Sinais e Sistemas -2013/2014 -2 semestre Classificaes do 1 teste  

E-print Network

.133 65390 Joao Francisco Guerra Gamelas 65396 João Manuel Quadros Morgado B c b f v v f f f c 2.0 2.0 -0.6 1.1 1 2 1.0 0.0 7.300 67593 Gonçalo dos Santos Bravo B c a v f v f f f a 2.0 -0.4 0.333 0.333 -0

Almeida, Luis B.

207

Sinais e Sistemas -2 semestre de 2013/2014 Classificaes aps o 2 teste  

E-print Network

.133 0.853 1 65390 Joao Francisco Guerra Gamelas 0 65396 João Manuel Quadros Morgado 7.367 3.492 5.042 5.378 9.520 10 67568 Daniel Rodrigues Mendes 7.300 5.100 5.980 6 67593 Gonçalo dos Santos Bravo 7.600 4

Almeida, Luis B.

208

Sinais e Sistemas -2013/2014 -2 semestre Classificaes do 2 teste  

E-print Network

Ferreira da Fonseca 65390 Joao Francisco Guerra Gamelas 65396 João Manuel Quadros Morgado 3.937 B f v f v v Santos Bravo 4.100 B v v f f f f f v f b d g 0.222 0.222 0.222 -0.222 0.222 0.222 -0.222 0.222 -0.222 -0

Almeida, Luis B.

209

Sinais e Sistemas -1 semestre de 2013/2014 Classificaes finais  

E-print Network

.967 3.417 8.647 9 63307 Tiago Manuel da Silva Miguel 64663 Iurie Solomon 64715 Ana Carolina Grilo da Guerra Gamelas 3.857 4 65396 João Manuel Quadros Morgado 5.740 6 65423 Luís Manuel da Gama Minas 17 Borralho Caria Mendes 67568 Daniel Rodrigues Mendes 4.600 1.840 7.680 8 67593 Gonçalo dos Santos Bravo 8

Almeida, Luis B.

210

Sobre la Universidad UMASS Amherst es el recinto principal del sistema de la Universidad  

E-print Network

Massachusetts. La universidad está ubicada en el oeste de Massa- chusetts en una de las zonas más seguras y universidad no sólo tiene uno de los mejores centros de recreación del país, también la pintoresca zona de-70 Mejores Universidades por reputación #55 Artes y Humanidades #50 Clínicos/preclínicos y Salud #51 Ciencias

Mountziaris, T. J.

211

Sistema bibliotecario Nel 2009 la Divisione Coordinamento Biblioteche ha proseguito nello sviluppo e potenziamento  

E-print Network

elettronici a 9.130, sono stati messi a disposizione 43 ebooks e 171 banche dati bibliografiche e fattuali. L'utilizzo della Biblioteca digitale è molto cresciuto: il numero dei download del proxy sono di 1.443 gigabytes); il costo per download (costo totale dei periodici

De Cindio, Fiorella

212

Modelo 3C de Colaborao para o desenvolvimento de Sistemas Colaborativos  

E-print Network

desenvolvimento: para auxiliar a análise do groupware a ser desenvolvido; no estabelecimento do foco para o desenvolvimento de sucessivas versões do groupware num processo iterativo e investigativo; e para o Groupware, Modelo 3C de Colaboração 1. INTRODU��O A colaboração envolve comunicação, coordenação e

Barbosa, Alberto

213

Avaliação de variedades de morangueiro em sistemas hidropônicos sob casa de vegetação  

Microsoft Academic Search

Experiments were accomplished in the experimental field of the Faculty of Agricultural Engineering at State University of Campinas (Unicamp). Four varieties of strawberry were tested (Campinas, Seascape, Sweet Charlie and Tudla) in four hydroponics production systems (100mm and 150mm channels and 150mm channel with a vase containing coconut fiber and a vertical pipe containing carbonized rice skin) in three greenhouses

Edilson Costa; Paulo Martins Leal

2008-01-01

214

Armazenamento sob condições ambiente e aceitabilidade do melão 'F1 Jangada' produzido em sistema hidropônico  

Microsoft Academic Search

The objective of this work was to evaluate the storage period postharvest and acceptability by consumer of hybrid melon 'F1 Jangada' (Cucumis melo L.), produced in hydroponic system, stored in atmosphere conditions (22 ± 2 ºC and 40 ± 5% relative humidity). The research was carried from June 21st to August 2nd, 2005. It was applied a 5 x 2

Maria M. Rinaldi; Delvio Sandri; Dayanna M. C. Nunes; Adriana G. do Amaral

2006-01-01

215

Jogos inteligentes como sistemas abertos: singularizando as possibilidades de interação com desafios lógicos  

Microsoft Academic Search

This work presents, in general way an application of Artificial Intelligence in Education, it simulates how to process the understanding of cognitive stages based in Piagetian tests, making possible, the implementation of multi-agents computerized open challenges. This challenges are part of a platform-environment propose, integrating the Intelligent Systems Laboratory - LSI\\/UFMA and the Laboratory of Studies in Language, Interaction and

Othon de Carvalho; Bastos Filho; Margarete Axt; Luis Carlos; C. Fonseca; Sofiane Labidi; Lucas Nunes Guimarães; Andrei Rubina Thomaz

216

Adaptac~ao ao Contexto em Sistemas de Comunicac~ao Heterogeneos  

E-print Network

. Considerem-se por exemplo aplicac¸ ~oes cooperativas multi-utilizador tais como os jogos em rede ou aplicac¸~oes cooperativas multi-utilizador (tais como os jogos on-line). Embora a maioria das concretizac¸~oes actuais destes jogos se baseiem em arquitecturas cliente-servidor, foram j´a de- Este trabalho foi

Rodrigues, Luís E.T.

217

Desenvolvimento de Sistemas e Servios para a Internet com Interface WWW Jos Luis Borbinha*  

E-print Network

MODELO COMPUTACIONAL DO WWW O modelo computacional do WWW baseia-se no modelo cliente-servidor conforme Especializado Servidor WWW Figura 1: O modelo computacional WWW. O HTTP é bastante adequado para a pesquisa e

da Silva, Alberto Rodrigues

218

INGENIERA TCNICA EN INFORMTICA DE SISTEMAS Coordinador titulacin: Paloma Cceres (paloma.caceres@urjc.es)  

E-print Network

: Inteligencia Artificial PER: Periféricos de Computadores SIM: Técnicas de Simulación VC: Visión Computacional Computacional (común con ITIS grupo B: mismo aulario y aula: Aulario II, Aula 001) RAL: Redes de Área Local ROB Computadores SIM: Técnicas de Simulación VC: Visión Computacional (Aulario II, Aula 106) LE: Horario reservado

Rey Juan Carlos, Universidad

219

Utilização e Avaliação do sistema computacional CONSTRUFIG3D para apoio ao ensino da geometria  

Microsoft Academic Search

This work presents the usage and evaluation of the computational system CONSTRUFIG3D for support to the teaching of the 2D and 3D geometries. In a brief analysis concerning the traditional teaching, they are noticed flaws that thwart the proposal of set education in the construction of the knowledge and of as the student's cognitive development happens. Due to the importance

Janaina Veiga Carvalho

220

Curso: Modelizacion y simulacion matematica de sistemas Metodologia para su implementacion computacional  

E-print Network

´on computacional ´Ultima Clase!!! Alejandro D. Otero (aotero@fi.uba.ar) Facultades de Ciencias Exactas y Naturales´atico y computacional Modelado matem´atico y computacional Un Modelo representa la realidad Un modelo Complutense Latinoamericana 2 / 17 #12;Modelado matem´atico y computacional Modelado matem´atico y

Figueira, Santiago

221

Optimización on-line de Sistemas de Tiempo Real con Computación Imprecisa Basados en Recompensas  

Microsoft Academic Search

Resumen. En este trabajo se aborda el problema de optimizar, en tiempo de ejecución, la recompensa obtenida de un conjunto de tareas de tiempo real compuestas por una parte obligatoria de tiempo real duro y otra opcional. La ejecución de la parte opcional de una tarea proporciona una recompensa local según una determinada ley de recompensas no decrecientes que, en

José M. Urriza; Ricardo Cayssials; Javier D. Orozco

222

Sistema de Desafios Abertos Inteligentes: um incremento computacional lúdico para se trabalhar o problema da aprendizagem  

Microsoft Academic Search

The work contextually in general lines action of the Educational Technology applying techniques of Artificial Intelligence with the theory of Jean Piaget. Such research, still in implementation phase, has as hypothesis that from a playful increment, supported for IA, will be possible to reach learning situations and, consequently, of cognitive development for its user. This if gives by means of

Othon C. Bastos Filho; Margarete Axt; Sofiane Labidi; Paloma Dias Silveira

223

Clusters ou Sistemas Locais de Produção: Mapeamento, Tipologia e Sugestões de Políticas  

Microsoft Academic Search

This paper sets out to advance further in the development of a methodol- ogy for mapping, classifying and characterizing Local Production Systems (LPS) in Brazil. Such effort is justified not only for the importance these systems have been amassing for generating jobs and social welfare, economic growth, exports and technological development, but also for the attention they have received from

WILSON SUZIGAN; JOÃO FURTADO; RENATO GARCIA; SÉRGIO SAMPAIO

2004-01-01

224

GPS, punto de contacto entre la Astronomía y otras disciplinas  

NASA Astrophysics Data System (ADS)

En los primeros años de la pasada década, un grupo de Astrónomos de La Plata iniciaron trabajos de investigación en Geodesia Satelital. En esta presentación se propone repasar sus principales logros y situarlos en el contexto del desarrollo de la disciplina a nivel mundial. Por entonces las aplicaciones prácticas de la disciplina eran indirectas y solo evidentes para los especialistas. Los errores del Posicionamiento Satelital eran de varios metros y en posicionamiento relativo, del orden de medio metro. Estos resultados se lograban al cabo de varios días de medición continuada. En los años siguientes, el sistema GPS alcanzó su nivel operacional y produjo una revolución tanto en lo relacionado con los tiempos de medición como con las precisiones. El grupo de La Plata se desarrolló simultáneamente con GPS, lo que posibilitó su participación actual en diversos temas vigentes: aplicaciones de alta precisión para la materialización de sistemas terrestres de referencia, monitoreo de movimientos de la corteza, contribución con servicios internacionales para la determinación de movimientos tectónicos globales y regionales, monitoreo de la ionósfera a partir de la propagación de las señales, determinación de la ondulación del geoide a escala local, etc. También se generaron muchas aplicaciones prácticas algunas en tiempo real: navegación, apoyo a imágenes aéreas o satelitales, aplicaciones a la agricultura, catastro y ordenamiento territorial, apoyo a relevamientos geofísicos, etc.

Perdomo, R.

225

The WildList Organization International  

NSDL National Science Digital Library

The WildList is a free list of all known computer viruses that are spreading in the world, as compiled by volunteer antivirus experts of the WildList Organization International. It is updated monthly and, as one can imagine, is quite lengthy. The site has many other interesting features besides the list. For example, a somewhat humorous article by the WildList's founder describes his views on "how scientific naming works" for computer viruses. Several other papers are also offered that deal with virus issues. Some links to sites that test products or describe viruses are given as well. This site takes a very objective approach to releasing information and, therefore, does not endorse any particular antivirus software.

1999-01-01

226

Distributive immunization of networks against viruses using the `honey-pot' architecture  

NASA Astrophysics Data System (ADS)

Although computer viruses cause tremendous economic loss, defence mechanisms fail to adapt to their rapid evolution. Previous immunization strategies have been characterized as being static and centralized, which has made virus containment difficult or even impossible. We suggest, instead, to propagate the immunization agent as an epidemic. The main problem with epidemic vaccine propagation is that it is bound to lag behind the virus. We suggest giving the vaccine an advantage over the virus by allowing it to leapfrog through a separate, overlapping, partially correlated network. This enables the antivirus to contain the epidemic efficiently. We systemize this concept with a `honey-pot' architecture that achieves both early virus discovery and rapid antivirus dissemination. We present analytic, as well as simulation, results for a set of realistic topologies that illustrate the effectiveness of this approach.

Goldenberg, Jacob; Shavitt, Yuval; Shir, Eran; Solomon, Sorin

2005-12-01

227

IMPORTANCE OF ACHIEVING SEMANTIC INTEROPERABILITY FOR NATIONAL HEALTH INFORMATION SYSTEMS IMPORTÂNCIA DO ALCANCE DA INTEROPERABILIDADE SEMÂNTICA PARA OS SISTEMAS NACIONAIS DE INFORMAÇÃO EM SAÚDE LA IMPORTANCIA DEL ALCANCE DE LA INTEROPERABILIDAD SEMÁNTICA PARA LOS SISTEMAS NACIONALES DE INFORMACIÓN EN SALUD  

Microsoft Academic Search

This reflective paper examines relationships between the Government policy-makers in health; health care providers in general; and the adoption of health care information, knowledge, and communication technologies. These technologies include the adoption of a national health language and computer science standards in health. These reflections are based on the author's observations and international involvement in the development of standards and

Evelyn Johanna; Sophia Hovenga; Hovenga EJS

2008-01-01

228

Reseña del desarrollo de sistemas nacionales contra la legitimación de recursos de procedencia ilícita en el sistema financiero y en los mercados de capitales de algunos países de América Latina  

Microsoft Academic Search

El documento que se presenta a continuación está orientado a destacar los aspectos básicos que deben ser considerados por los países de nuestra región para establecer instituciones, normas jurídicas y regulaciones eficientes y adecuadas para prevenir con posibilidades de éxito al delito de lavado de dinero, ilícito de carácter transnacional que tiene la capacidad de ejercer nocivos efectos sobre las

Pedro Luis Echeverría

2001-01-01

229

Analysis of the maximum discharge of karst springs  

NASA Astrophysics Data System (ADS)

Analyses are presented of the conditions that limit the discharge of some karst springs. The large number of springs studied show that, under conditions of extremely intense precipitation, a maximum value exists for the discharge of the main springs in a catchment, independent of catchment size and the amount of precipitation. Outflow modelling of karst-spring discharge is not easily generalized and schematized due to numerous specific characteristics of karst-flow systems. A detailed examination of the published data on four karst springs identified the possible reasons for the limitation on the maximum flow rate: (1) limited size of the karst conduit; (2) pressure flow; (3) intercatchment overflow; (4) overflow from the main spring-flow system to intermittent springs within the same catchment; (5) water storage in the zone above the karst aquifer or epikarstic zone of the catchment; and (6) factors such as climate, soil and vegetation cover, and altitude and geology of the catchment area. The phenomenon of limited maximum-discharge capacity of karst springs is not included in rainfall-runoff process modelling, which is probably one of the main reasons for the present poor quality of karst hydrological modelling. Résumé. Les conditions qui limitent le débit de certaines sources karstiques sont présentées. Un grand nombre de sources étudiées montrent que, sous certaines conditions de précipitations extrêmement intenses, il existe une valeur maximale pour le débit des sources principales d'un bassin, indépendante des dimensions de ce bassin et de la hauteur de précipitation. La modélisation des débits d'exhaure d'une source karstique n'est pas facilement généralisable, ni schématisable, à cause des nombreuses caractéristiques spécifiques des écoulements souterrains karstiques. Un examen détaillé des données publiées concernant quatre sources karstiques permet d'identifier les raisons possibles de la limitation de l'écoulement maximal: (1) la dimension limitée du conduit karstique, (2) l'écoulement en charge, (3) le débordement dans un autre bassin, (4) le débordement du réseau s'écoulant vers la source principale par des sources temporaires dans le même bassin, (5) le stockage d'eau dans la zone surmontant l'aquifère karstique ou la zone épikarstique du bassin, et (6) des facteurs tels que le climat, le sol et le couvert végétal, l'altitude et la géologie du bassin d'alimentation. Le phénomène de capacité limitée du débit maximal des sources karstiques n'est pas pris en compte dans la modélisation des processus de précipitation-ruissellement, ce qui est probablement une des principales raisons de l'actuelle médiocre qualité de la modélisation hydrologique du karst. Resumen. Se presenta un análisis de las condiciones que limitan la descarga de algunos manantiales kársticos. Un elevado número de los manantiales estudiados muestra que, bajo condiciones de precipitación extremadamente intensa, hay un valor máximo para la descarga de los manantiales principales de la cuenca, independientemente del tamaño de ésta y del volumen de precipitación. La modelación de la descarga de manantiales kársticos no es fácil de generalizar y esquematizar debido a la existencia de numerosas características que son inherentes a los sistemas kársticos de flujo. A partir del estudio detallado de los datos publicados sobre cuatro manantiales kársticos, se identificó las posibles causas de la existencia de un caudal máximo de descarga: (1) el tamaño limitado del conducto kárstico, (2) el caudal surgente, (3) la descarga a otras cuencas, (4) el desbordamiento del sistema de flujo principal hacia manantiales intermitentes dentro de la misma cuenca, (5) el almacenamiento de agua en la zona superior del acuífero kárstico o zona epikárstica de la cuenca, y (6) factores tales como el clima, suelo y cubierta vegetal, y la altitud y geología de la zona de captación. La limitación de la descarga máxima de los manantiales kársticos no ha sido incluida en la modelación del proceso lluvi

Bonacci, Ognjen

2001-07-01

230

Can DNS-Based Blacklists Keep Up with Bots?  

Microsoft Academic Search

Many Internet Service Providers (ISPs), anti-virus com- panies, and enterprise email vendors use Domain Name System-based Blackhole Lists (DNSBLs) to keep track of IP addresses that originate spam, so that future emails sent from these IP addresses can be rejected out-of-hand. DNSBL operators populate blocking lists based on complaints from recipients of spam, who report the IP address of the

Anirudh Ramachandran; David Dagon; Nick Feamster

2006-01-01

231

Secure Mechanism for Mobile Web Browsing  

Microsoft Academic Search

The prevailing of mobile network provides increasing web applications and services available on mobile devices. However, most of the websites are developed with limited security consideration, let alone web services for mobile users. Hackers take advantage of the web-based vulnerabilities to inject malicious JavaScript into compromised web pages, and a mobile victim visits the site will be compromised. Current anti-virus

Chia-Mei Chen; Ya-Hui Ou

2011-01-01

232

Metamorphic Viruses with Built-In Buffer Overflow  

Microsoft Academic Search

Metamorphic computer viruses change their structure—and thereby their signature—each time they infect a system. Metamorphic viruses are potentially one of the most dangerous types of computer viruses because they are difficult to detect using signature-based methods. Most anti-virus software today is based on signature detection techniques. In this project, we create and analyze a metamorphic virus toolkit which creates viruses

Ronak Shah

2010-01-01

233

Information Technology Services Newsletter: Spring 2004  

Microsoft Academic Search

C O N T E N T S ANGEL 6.0, Smart Classroom, NetOP 1 Anti-Virus FAQ, Websites, Faculty\\/Staff Technology Support Initiative, MINITAB 2 CTC Survey, Printing 3 Web Building, Assistive Technology, IT Spotlight 4 Web Accessibility, SUNY Learning Network 5 SUNY Training Center, EASI Training 6 Library Database Training,ITSS Software Training 7-8 FAQ’s - Firewalls, Spyware, SPAM, E-mail Filters 9

Mary Jo Orzech

2004-01-01

234

Genetic polymorphisms of TLR3 are associated with Nasopharyngeal carcinoma risk in Cantonese population  

Microsoft Academic Search

BACKGROUND: Nasopharyngeal carcinoma is endemic in Southern China, displays a strong relationship with genetic susceptibility and associates with Epstein-Barr virus infection. Toll-like receptor 3 (TLR3) plays an important role in the antivirus response. Therefore, we examined the association between TLR3 gene polymorphisms and NPC susceptibility. METHODS: We performed a case-control study of 434 NPC cases and 512 healthy controls matched

Jun-Fang He; Wei-Hua Jia; Qin Fan; Xin-Xi Zhou; Hai-De Qin; Yin Yao Shugart; Yi-Xin Zeng

2007-01-01

235

A assembléia de aves de áreas úmidas em dois sistemas de cultivo de arroz irrigado no extremo sul do Brasil  

Microsoft Academic Search

The wetland bird assemblage in two irrigated rice fields in southern Brazil. Seventeen wetland bird counts were conducted from November 1998 to March 1999 in two 52 ha rice paddies using no-tillage and \\

Rafael A. Dias; Maria Inês Burger

236

Isolamento de Salmonella spp. em pombos (Columba livia) no Distrito Federal : aspecto de relevância ao sistema de vigilância em saúde.  

E-print Network

??Dissertação (mestrado)—Universidade de Brasília, Faculdade de Agronomia e Medicina Veterinária, Programa de Pós-Graduação em Saúde Animal, 2014. A domesticação de pombos da espécie Columba livia,… (more)

Santos, Ivanildo de Oliveira Correia

2014-01-01

237

DISEÑO DE LOS PARÁMETROS DE UN ESTABILIZADOR DE SISTEMAS DE POTENCIA (PSS) BASADO EN UNA TÉCNICA EVOLUTIVA  

Microsoft Academic Search

This paper shows a method of design appears to find the parameters of a classic power system stabilizer. This method consists of an evolutionary technique that makes an optimal adjustment of the parameters of the PSS. The eigenvalue analysis and linear and nonlinear simulation results show the effectiveness of the technique in the damping of oscillations extending the stability limits.

Ingeniero Electricista; CARLOS A. RESTREPO; GRUPO DE INVESTIGACIÓN

2007-01-01

238

OFERTA DE DISCIPLINAS PARA O 1 PROGRAMA DE PS-GRADUAO EM ENGENHARIA DE SISTEMAS ELETRNICOS E DE AUTOMAO  

E-print Network

Oliveira Nascimento BT-34/15 363685 ­ Redes de Computadores ­ A (CR ­ 04) (20 ­ Vagas) 3ª 16:00 ­ 18:00 5ª Sala 103 366111 - Fundamentos de Robótica ­ A (CR ­ 04) (10 ­ Vagas) 4ª 08:00 ­ 10:00 6ª 08:00 ­ 10

Carvalho, João Luiz

239

Life Support Systems. Environment Booklet 1. Teacher's Edition=Sistemas vitales. Libro del medio ambiente 1. Manual para El Maestro.  

ERIC Educational Resources Information Center

The booklet is part of a grade 10-12 social studies series produced for bilingual education. The series consists of six major thematic modules, with four to five booklets in each. The interdisciplinary modules are based on major ideas and designed to help students understand some major human problems and make sound, responsive decisions to improve…

California State Univ., Los Angeles. National Dissemination and Assessment Center.

240

LIBERAÇÃO DE MACRONUTRIENTES DE RESÍDUOS DO CONSÓRCIO ENTRE MUCUNA PRETA E MILHO SOB SISTEMA ORGÂNICO DE PRODUÇÃO  

Microsoft Academic Search

-1 in no till system and conventional system respectively. At the end of the first month after the litter bags field installation, about 42% of the mucuna + corn initial dry mass still remained in the field with no till system and about 45% in conventional system; approximately 75% of N in no till system and 70% in conventional system,

CELESTE QUEIROZ ROSSI; RAFAELA ELOI DE ALMEIDA ALVES; PEDRO RAPHAEL TERRA FERNANDES; MARCOS GERVASIO PEREIRA; RAUL DE LUCENA; DUARTE RIBEIRO; JOSÉ CARLOS POLIDORO

2008-01-01

241

Migrações ascendentes de peixes neotropicais e hidrelétricas: proteção a jusante de turbinas e vertedouros e sistemas de transposição.  

E-print Network

??Este trabalho se propõe a examinar aspectos de engenharia, particularmente da engenharia hidráulica, referentes aos impactos dos aproveitamentos hidrelétricos sobre deslocamentos migratórios ascendentes de peixes,… (more)

Ricardo Ahouagi Carneiro Junho

2008-01-01

242

EL SISTEMA DE VOUCHERS EN LA EDUCACIÓN: UNA REVISIÓN DE LA TEORÍA Y LA EVIDENCIA EMPÍRICA PARA CHILE  

Microsoft Academic Search

En Chile el 90% de los niños cursa su educación básica y media en escuelas municipales o particulares financiadas parcial o totalmente con recursos públicos. Los recursos que reciben estas escuelas dependen del número de alumnos atendidos. Cada alumno es \\

Cristian Aedo; Claudio Sapelli

243

Cuerpo de Paz Manual de Sistema de Programacion y Capacitacion (Peace Corps Programming and Training System Manual): T0063.  

ERIC Educational Resources Information Center

This Spanish version of the Peace Corps Programming and Training System Manual is designed to help field staff members of the Peace Corps train volunteers. Its task descriptions, guidelines, examples, and definitions are intended to be practical and informative rather than restrictive. The manual is divided into six major sections: (1)…

Peace Corps, Washington, DC.

244

La expansión del arándano en Entre Ríos, Argentina: Alcances e implicancias del aprovechamiento de un sistema productivo regional preexistente1  

Microsoft Academic Search

Grupo 28. Complejos agroindustriales y globalización agroalimentaria Abstract The expansion of fruit and vegetable production in less developed countries, orientated to counter-seasonal markets, has been considered as a hallmark of growing food globalization and the prevalence of new forms of private regulation of these markets. This paper is focused on the features of blueberry production in one of the main

Clara Craviotti; Carlos Cattaneo

245

CASH - UM SISTEMA INTEGRADO DE VENDA DE CONTEÚDO PELA INTERNET CASH - AN INTEGRATED SELLING SYSTEM OF CONTENT BY THE INTERNET  

Microsoft Academic Search

This article shows some results of conclusion work of the Information Systems superior course of the students Wesley and Wellisney, under orientation of the professor Vanessa. The work was realized following methodologies and technologies studied during the course. The main goal is the creation of an integrated and online selling system of journalistic content by the Internet. The need came

Wesley Pereira da Silva; Wellisney S. M. Gomes; Vanessa Battestin Nunes

246

A Mixed Hardware\\/Software SOFM Training System Sistema Híbrido Hardware\\/Software para el Entrenamiento de Redes SOFM  

Microsoft Academic Search

This paper describes the design of a training system for a Self-Organizing Feature Map (SOFM). The system design aims two goals. The first is to reduce the training processing time by exploiting the inherent neural networks (NNs) parallelism through the SOFM hardware implementation. The second goal is to provide versatility to the training process by means of pre- and post

Agustín Ramírez Agundis; Rafael Gadea Girones; Ricardo Colom Palero; Javier Díaz Carmona

247

SIG-Dengue: Sistema de Informações Geográficas para o monitoramento e controle da dengue no estado do Paraná  

Microsoft Academic Search

This work aims the development and establishment of a Geographic Information System (GIS) for monitoring and control dengue disease in Paraná state, Brazil. Due to the fact that dengue involves environmental and socio aspects, presents a strong spatial and dynamic characteristic, a customized GIS platform used as a Decision Support System is needed. The system will allow data spatial analysis

Eduardo Vedor de Paula; Flávio Deppe

2005-01-01

248

Análise da competitividade da produção de soja no sistema de plantio direto no Estado de Mato Grosso do Sul  

Microsoft Academic Search

The Brazilian agricultural sector, which is underg oing the settlement of new production and trading patterns, faces the challeng e of growing in a competitive and sustainable fashion, in order to attend domestic de mand while acquiring and holding positions in foreign markets, and by providing qual ity products and processes with sustainability and competitive prices. To attend th e

Maria Isabel da Silva Azevedo Alvim; Lourival Batista de Oliveira Júnior

2005-01-01

249

Extração de batimetria por sensoriamento remoto de áreas rasas dos sistemas estuarinos do Estado do Paraná - Brasil  

Microsoft Academic Search

Satellite images offers, at low costs, bathymetric maps of areas that are difficult to cover for traditional hydrographic methods. In the north area of the Estuarine Complex of Paranaguá the last bathymetric update was made in the 50's, and in the inner part of the Guaratuba Bay there are no bathymetric data. A bathymetric mapping of these areas, even without

Lilian Anne Krug

2005-01-01

250

Sistema de vigilancia epidemiológica para el paciente diabético; el uso de tecnología computacional en la calidad de la atención médica  

Microsoft Academic Search

Objective. To describe an instrument for epidemiologic sur- veillance of diabetes mellitus and evaluating the quality of care in primary health care. Material and methods. The study was conducted from January 1, 1998, to June 30, 1999, at the Epidemiology and Health Services Research Unit of the Mexican Institute for Social Security (IMSS), in Hermosi- llo, Sonora. A single data

Ramón Alberto Rascón-Pacheco; Manuel Alberto Santillana-Macedo; María Elena Romero-Arredondo; Blanca Margarita Rivera-Icedo; José Alfredo Romero-Cancio; Alex Iván Cota-Rembau

2000-01-01

251

DESENVOLVIMENTO E IMPLEMENTAÇÃO DE UMA BASE COMPUTACIONAL ORIENTADA A OBJETOS PARA APLICAÇÕES EM SISTEMAS DE ENERGIA ELÉTRICA  

Microsoft Academic Search

This paper describes the application of the Object-Oriented Programming (OOP) on the modeling of Power Systems. It is intend to develop a computational object-oriented base to represent, in an efficient way, the physical component s of a Power System and their methodologies of analysis and synthesis. The generalization level of the classes' structure allows fut ure specializations, on the side

MARCELO N. AGOSTINI; ILDEMAR C. DECKER; AGUINALDO S. E SILVA

2000-01-01

252

ADIPOQUINAS EN EL NIÑO SANO Y AFECTO DE OBESIDAD  

PubMed Central

El incremento universal de la prevalencia de obesidad en niños y adolescentes durante las últimas décadas, junto con la evidencia creciente de que el establecimiento de obesidad en etapas precoces de la vida está asociado con un incremento de la prevalencia de comorbilidades y del riesgo de muerte prematura, con gran repercusión económica en los sistemas sanitarios de los países occidentales, ha impulsado la investigación en este área. Estos estudios han remarcado la importante actividad endocrina del tejido adiposo, ejercida por medio de la síntesis y secreción de un gran número de péptidos y citoquinas, denominados adipoquinas. En esta revisión se resume el estado actual de los conocimientos, así como los estudios más relevantes, en relación con la dinámica de secreción de las principales adipoquinas en niños, centrándose en el control de la homeostasis energética, regulación metabólica (fundamentalmente, metabolismo de los hidratos de carbono) e inflamación. Asímismo, se analizan las particularidades de la síntesis, secreción y acciones de las adipoquinas desde el nacimiento hasta la adolescencia, reseñando el efecto que, sobre ellas, ejerce la instauración de la obesidad. PMID:23228441

Martos-Moreno, G.A.; Kopchick, J.J.; Argente, y J.

2015-01-01

253

Aplicación de la metodología Molecular de Orbitales de Defecto Cuántico (MQDO) al cálculo de intensidades vibrónicas y vidas medias de niveles vibracionales  

NASA Astrophysics Data System (ADS)

Desde que se formuló, en 1996, la metodología Molecular de Orbitales de Defecto Cuántico (MQDO) [1], se han obtenido datos de calidad relativos a intensidades de bandas electrónicas que implican estados Rydberg para una gran variedad de sistemas moleculares [2]. Animados por los buenos resultados obtenidos, recientemente hemos abordado el estudio de transiciones vibrónicas, es decir aquellas que ocurren entre estados vibracionales que pertenecen a distintos estados Rydberg electrónicos. Como prototipo adecuado para nuestros propósitos hemos elegido la molécula de NO, importante en la química de la atmósfera, y para la cual existen en la bibliografía datos experimentales de calidad suficiente para contrastar la validez de nuestros resultados. En concreto, hemos calculado las fuerzas de oscilador y coeficientes de Einstein para transiciones electrónicas y vibrónicas de las principales bandas del NO, al igual que vidas medias radiativas de niveles vibracionales de dicha molécula. Las propiedades estudiadas son esenciales para la comprensión de los aspectos teóricos de los procesos físicos básicos relativos a la dispersión electrónica en moléculas heteronucleares con capas abiertas. Además, valores fiables de probabilidades de transición moleculares tienen importantes aplicaciones en Astrofísica, en la modelización de procesos fotodinámicos moleculares, etc., al igual que para evaluar más profundamente la validez de nuestra metodología teórica.

María Velasco Sanz, Ana

254

IgG subclass responses to Theiler's murine encephalomyelitis virus infection and immunization suggest a dominant role for Th1 cells in susceptible mouse strains.  

PubMed Central

Inbred mouse strains differ in susceptibility to Theiler's murine encephalomyelitis virus (TMEV)-induced demyelinating disease. A strong correlation between disease susceptibility and delayed-type hypersensitivity (DTH) has been previously demonstrated, but no strong correlation between disease susceptibility and total anti-TMEV ELISA titres was shown. Since both DTH and IgG2a antibody production are regulated by CD4+ Th1 cells, we investigated three strains of mice to determine whether antivirus IgG2a antibody levels, like DTH in previous studies, correlated with disease susceptibility. Susceptible SJL/J, intermediately susceptible C3H/HeJ, and resistant C57BL/6 mice were infected intracerebrally (i.c.) with the BeAn strain of TMEV and monitored for clinical signs of demyelination and for levels of TMEV-specific antibody of different IgG subclasses using a particle concentration fluorescence immunoassay (PCFIA). Resistant C57BL/6 mice were found to have significantly lower concentrations of total anti-TMEV antibody than susceptible SJL/J mice and intermediately susceptible C3H/HeJ mice show variable antibody responses. A predominance of anti-TMEV IgG2a (Th1 regulated) antibody was seen in susceptible and intermediately susceptible mice, whereas resistant mice displayed a predominant anti-TMEV IgG1 (Th2 regulated) response accompanied by a marked deficiency of IgG2a. In contrast, immunization of C57BL/6 mice with UV-inactivated TMEV in adjuvant revealed that this strain was not defective either in its ability to generate high levels of anti-TMEV antibody or in its ability to produce IgG2a antibody. These results suggest that the antivirus IgG subclass profile is dependent upon the immunization route, virus viability and/or the use of adjuvant and that the levels of antivirus subclasses may be predictive of disease susceptibility. PMID:1350571

Peterson, J D; Waltenbaugh, C; Miller, S D

1992-01-01

255

Stability and Hopf bifurcation for a delayed SLBRS computer virus model.  

PubMed

By incorporating the time delay due to the period that computers use antivirus software to clean the virus into the SLBRS model a delayed SLBRS computer virus model is proposed in this paper. The dynamical behaviors which include local stability and Hopf bifurcation are investigated by regarding the delay as bifurcating parameter. Specially, direction and stability of the Hopf bifurcation are derived by applying the normal form method and center manifold theory. Finally, an illustrative example is also presented to testify our analytical results. PMID:25202722

Zhang, Zizhen; Yang, Huizhong

2014-01-01

256

McAfee's Virus Information Library  

NSDL National Science Digital Library

McAfee, the well-known anti-virus software company, offers this free library, containing information on over 40,000 known PC viruses. Virus details include their source, how they infect your computer, and how to remove them. Users can search for viruses by keyword or browse by category. The site also lists new viruses, the year's top ten, and hoax viruses. Although in most cases the instructions for virus removal include the use of a McAfee product, the site is still an excellent source of virus information.

257

Northern Light Special Edition: Computer Viruses  

NSDL National Science Digital Library

The latest special edition from Northern Light brings together a handy collection of resources on computer viruses, primarily news items and links to related sites. These are grouped in six sections, including current news, US government resources, online reference, anti-virus solutions, and virus writers & hackers. Each section begins with a link to related search returns from Northern Light. While this page is certainly not the end-all resource for virus information, it is a perfectly fine place to begin your search.

258

Jumbo!  

NSDL National Science Digital Library

Jumbo: the "official" shareware site of the Web. This searchable archive contains over 24,000 shareware and freeware programs. Categories include: business, home and personal, programming, utilities, and words and graphics. Within each category, programs are cataloged by operating system. The entire archive is a searchable by program category and operating system. There is a short annotation with the programs to help determine whether to download them or not. Size of program is given. A "starter kit" of a decompression and anti-virus program is also provided for each operating system. This is an excellent specialty site.

1998-01-01

259

Evaluation of Tools for Protection of Interest against Hacking and Cracking  

NASA Astrophysics Data System (ADS)

The internet considered a tool that effectively ensures communication globally has been hindered by hackers and crackers continuously. In so doing, a multitude of network facilitated tools such as firewalls, virtual private networks (VPN) and a variety of antivirus software packages has been enabled for dealing with such predicaments. However, more often than not these facilitated tools are marketed as perfect solutions to the ever culminating problems such as loss of data and privacy in networked and world wide intercommunications. We provide a forum for addressing these perceived problems in this paper.

Jahankhani, Hossein; Antonijevic, Branko; Walcott, Terry

260

Small-angle neutron scattering study of recombinant yeast-derived human hepatitis B virus surface antigen vaccine particle  

NASA Astrophysics Data System (ADS)

The overall and internal structure of recombinant yeast-derived human hepatitis B virus surface antigen vaccine particles was investigated by small-angle neutron scattering using the contrast variation method. The vaccine is a nearly spherical particle, and its contrast-matching point was determined to be at about 24% D 2O content, indicating that a large part of the vaccine particle is occupied by lipids and carbohydrates from the yeast. The Stuhrmann plot suggests that the surface antigens exist predominantly in the peripheral region of the particle, which is favorable to the induction of anti-virus antibodies.

Sato, M.; Ito, Y.; Kameyama, K.; Imai, M.; Ishikawa, N.; Takagi, T.

1995-02-01

261

Stability and Hopf Bifurcation for a Delayed SLBRS Computer Virus Model  

PubMed Central

By incorporating the time delay due to the period that computers use antivirus software to clean the virus into the SLBRS model a delayed SLBRS computer virus model is proposed in this paper. The dynamical behaviors which include local stability and Hopf bifurcation are investigated by regarding the delay as bifurcating parameter. Specially, direction and stability of the Hopf bifurcation are derived by applying the normal form method and center manifold theory. Finally, an illustrative example is also presented to testify our analytical results. PMID:25202722

Yang, Huizhong

2014-01-01

262

System Toolbox  

NSDL National Science Digital Library

System Toolbox is designed for system administrators who deal with a variety of platforms. The site covers Windows NT, General Unix, Novell, Linux, Solaris, HP-UX, and the Mac OS. The "toolbox" for each platform offers annotated links to Tools (Disk Management, Anti-Virus, Security, etc.), Articles, and other useful Links. While the information here is hardly comprehensive, the site offers useful, if often basic, resources for administrators. System Toolbox's brand new History section looks promising, with two articles currently posted, "Von Braun's Slide Rule" and "The Godfather of Computing - Charles Babbage." The Comments section allows users to post questions or comments.

2001-01-01

263

Design and Implementation of a Secure Modbus Protocol  

NASA Astrophysics Data System (ADS)

The interconnectivity of modern and legacy supervisory control and data acquisition (SCADA) systems with corporate networks and the Internet has significantly increased the threats to critical infrastructure assets. Meanwhile, traditional IT security solutions such as firewalls, intrusion detection systems and antivirus software are relatively ineffective against attacks that specifically target vulnerabilities in SCADA protocols. This paper describes a secure version of the Modbus SCADA protocol that incorporates integrity, authentication, non-repudiation and anti-replay mechanisms. Experimental results using a power plant testbed indicate that the augmented protocol provides good security functionality without significant overhead.

Fovino, Igor Nai; Carcano, Andrea; Masera, Marcelo; Trombetta, Alberto

264

Sistemas de Documentacion e Informacion Educativa en Belgica, Paises Bajos y Francia (Educational Documentation and Information Systems in Belgium, Holland, and France).  

ERIC Educational Resources Information Center

This booklet describes the working and organization of the information and documentation systems in Belgium, the Netherlands, and France. The discussion begins with a look at the Belgium educational system and how information services operate within that system. The central library, specialized services, and specialized information centers are all…

Rossi Etchelouz, Nelly Yvis

265

Efeito da disponibilidade de sítios de nidificação sobre o sistema de acasalamento e o cuidado paternal em um opilião neotropical (Arachnida: Opiliones).  

E-print Network

??Cavidades naturais constituem um recurso reprodutivo monopolizável, cuja disponibilidade determina a intensidade da competição macho-macho que, por sua vez, pode influenciar os custos do cuidado… (more)

Rachel Miranda Werneck

2012-01-01

266

LA VIABILIDAD FINANCIERA DEL SISTEMA DE PENSIONES DE REPARTO: APLICACIÓN A LA CONTINGENCIA DE JUBILACIÓN DEL RÉGIMEN GENERAL DE LA SEGURIDAD SOCIAL ESPAÑOLA  

Microsoft Academic Search

The main idea upon which this paper is based is that outlined by Samuelson (1958) -that a pensions system, financed by way of transfers between generations, will only be viable in the long term if the internal rate of return of the system does not exceed the growth rate of salaries plus the stable growth rate of the contributors- .Thisis

Ana Lejárraga; Carlos Vidal; José E. Devesa-Carpio

1999-01-01

267

El humanismo y la educacion en diversos niveles del sistema educativo national (Humanism and Education at Different Levels of the National Education System).  

ERIC Educational Resources Information Center

This document is an English-language abstract (approximately 1,500 words) of six studies of the different levels of education and the humanistic content of the teaching program at each level. On the preschool level, it is stated that kindergarten education in Mexico attempts to put the small child in contact with the world that surrounds him.…

Consejo Nacional Tecnico de la Educacion (Mexico).

268

Implementación de la Migración de la Base de Datos del Sistema Canopus de Informix 9.4C a Oracle 10g  

Microsoft Academic Search

Due to the needs of the Ecuadorian Navy for maintaining a standard in the utilization of Databases, We realize that Database Informix version 9.4c which is implemented in the Naval System Canopus could be migrated to database Oracle version 10g with the assistance of Power Builder and Power design tools from Sybase. We started the migration process to a lighter

Gerardo Villagomez; Harold Álvarez; Danny Vivanco; Fabricio Echeverría

269

[Rethinking how health is promoted in the Colombian general health-related social security system (Sistema General de Seguridad Social en Salud)].  

PubMed

This article takes stock of how promoting health (PH) (promoción de la salud - PS) has been understood within an international setting and gives three meanings for promotion: as general policy orientation, as a set of actions and as a special dimension of sanitary work. Interest expressed in giving it a specific basis distinguishing it from prevention, transcending educational work, has emerged from the subtle differences established from such different ways of coming to terms with PH. After recognising the challenge posed by PH in the field of health, the text succinctly describes how discourse regarding PH has been introduced in Colombia and discusses how an attempt has been made to be more precise regarding its place in the general health-related social security system. Efforts currently being made in Colombia regarding making PH become a reality within the Colombian health system are then mentioned. PMID:17361582

Eslava-Castañeda, Juan C

2006-12-01

270

Transmitancia acústica para un sistema multicapas con un perfil del Triángulo de Pascal Acoustical transmitance for multilayer system with Pascal's Triangle character  

Microsoft Academic Search

We calculate the acoustical transmittance, for normal incidence, as a function of the waves frequency, for a multilayer structure made of bilayers, where one layer is glass and the other is water. The width of the glass layer is modulated by a quasi-periodical numerical sequence taken from the Pascal's Triangle. This sequence is formed by quantity of odd numbers in

R. A. Reyes Villagrana; J. Madrigal Melchor; D. A. Contreras Solorio

271

Tracking and Treating Mobile Populations. The TB Net System. Migrant Clinicians Network Monograph Series. = El Sistema de Red para la TB.  

ERIC Educational Resources Information Center

A comprehensive tracking and referral network that helps provide continuity of care for mobile populations with active tuberculosis (TB) or TB infection is considered essential for effective treatment of TB. However, the interstate referral system that exists between state health departments has been highly inefficient for serving migrant…

Migrant Clinicians Network, Inc., Austin, TX.

272

Visión de los diferentes agentes sociales sobre la participación social en el sistema de salud en el nordeste de Brasil: una aproximación cualitativa  

Microsoft Academic Search

Concepts and opinions on social participation in health held by different groups of stakeholders in North-eastern Brazil. A qualitative study Background: Social participation in the health system constitutes one of the basic principles of Brazilian health sector reform. This paper analyses the concepts held by different groups of stakeholders with respect to social participation in health and identifies their opinions

M Luisa Vázquez Navarrete; M Rejane Ferreira da Silva; Eliane Siqueira Campos; Ana Paula Campos Pereira; Alcides da Silva Diniz; Ida Leite Veras; Ilma Kruze Grande de Arruda

2002-01-01

273

Agrobiodiversity genetic resources conservation for the development of sustainable production systems Conservación de recursos genéticos de la agrobiodiversidad como apoyo al desarrollo de sistemas de producción sostenibles  

Microsoft Academic Search

Human population growth and environmental changes require the availability of genetic diversity for the development of sustainable, efficient and competitive production systems. This means collection, conservation and characterization of the attributes present in the genetic resources of current important taxa and wild related, and promising species with development potential, which is magnified for a current genetic erosion. It requires complementary

Mario Lobo Arias; Clara Inés; Medina Cano

274

LLUVIA, ESCURRIMIENTO SUPERFICIAL Y EROSIÓN DEL SUELO EN SISTEMAS AGROFORESTALES DE CAFÉ BAJO SOMBRA RAIN, RUNOFF AND SOIL EROSION IN SHADED COFFEE AGROFORESTRY SYSTEMS  

Microsoft Academic Search

In a tropical region of Veracruz, México, five shaded coffee agroforestry systems were evaluated without repetition: 1) wild agroforestry system; 2) improved traditional polycultivation (PTM) with live barriers of \\

Joel Pérez-Nieto; Eduardo Valdés-Velarde; Matías E. Hernández-San Román; Víctor Ordaz-Chaparro

275

PROPUESTA DE UN SISTEMA DE GESTIÓN DE LOS COSTOS DE CALIDAD EN LA AGROINDUSTRIA ARROCERA DEL CAI FERNANDO ECHENIQUE DEL MUNICIPIO YARA  

Microsoft Academic Search

El trabajo fue realizado en la agroindustria arrocera del CAI Fernando Echenique ubicado en la Provincia Granma, en el cual se concentra el 70 por ciento de la producción de arroz de la región oriental del país. El estudio abarcó las Granjas arroceras Bartolomé Masó Márquez y Pedro Borrás Astorga, y la Unidad industrial de Beneficio Emilio Lastre, a partir

Yudelquis Ramírez Pérez; Sandy Rodríguez Sosa; Odalis Reyes Alarcón

2012-01-01

276

Sistema de aspiración-tracción en el tratamiento de la Fasciitis necrotizante del periné * Negative Pressure wound therapy for the treatment of perineal necrotizing fasciitis  

Microsoft Academic Search

Introduction: We discuss five patients treated at our institution. Besides the initial surgical debridement and antibiotic therapy, we used the negative-pressure wound therapy (NPWT) as part of their treatment. Patients and methods: The NPWT device was constructed with off-the-shelf components. After the diagnosis of perineal necrotizing fasciitis was established, all patients underwent surgical debridement of necrotic tissue. The wound was

BLAZENKO PUJADO; E. U. MARILDE; E. U. KARINA; PAULA VIDAL

277

SISTEMAS DE COLHEITA DA CANA-DE-AÇÚCAR E ALTERAÇÕES NAS PROPRIEDADES FÍSICAS DE UM SOLO PODZÓLICO AMARELO NO ESTADO DO ESPÍRITO SANTO1  

Microsoft Academic Search

A long term (1989-1994) experiment with sugar cane (RB 739735) was carried out, in Linhares, ES, Brazil, in order to evaluate the effect of two systems of sugar cane harvesting: the first with previous burning (burned cane), and the second with crop residue remaining on the soil surface (green cane), on some physical properties of a tableland Yellow Podzolic soil.

MARCOS BACIS CEDDIA; LÚCIA HELENA CUNHA; DOS ANJOS; EDUARDO LIMA; ALEXANDRE RAVELLI NETO

278

Evaluación del sistema API Coryne, versión 2.0, para la identificación de bacilos gram-positivos difteroides de importancia clínica  

Microsoft Academic Search

Evaluation of API Coryne system, version 2.0, for diphteroid gram-positive rods identification with clinical relevance. The ability of the API Coryne system, version 2.0, to identify 178 strains of gram-positive rods was evaluated. Seventy eight isolates belonged to genus Corynebacterium and one hundred to related genera, all strains were isolated from clinical samples at the Laboratory of Bacteriology, Hospital de

M. N. ALMUZARA; C. DE MIER; C. R. RODRÍGUEZ; A. M. R. FAMIGLIETTI; C. A. VAY

279

Revista de Derecho Administrativo Econmico, N 12, Pg. 135 -153 [2004] Rudnick, Hugh -Mocrquer, Sebastin-Sore,FrankoInDistribucin de pagos de sistemas de transmisin  

E-print Network

Revista de Derecho Administrativo Económico, N° 12, Pág. 135 - 153 [2004] Rudnick, Hugh - Mocárquer Derecho Eléctrico, 2 y 3 de julio de 2003, Facultad de Derecho de la Pontificia Universidad Católica de 1992, en un estudio para la Republica Argentina, publicado en el IEEEen 1995. #12;Revista de Derecho

Catholic University of Chile (Universidad Católica de Chile)

280

Translocación del tercio medio facial en un paciente en edad infantil. Fijación con un nuevo sistema de placas y pines reabsorbibles  

Microsoft Academic Search

Mid-facial translocation, which involves mobilization of the central facial skeletal structures together with soft tissue pedicles, provides generous access to the anterior and central regions of the skull base. One of the drawbacks of this approach in children is skeletal fixation with titanium osteosynthesis plates and screws, which may affect the growth of developing bone. Consequently, a second intervention is

Manel Coll-Anglada; Julio Acero-Sanz; Alejandro Thomas-Santamaría; Sergio Ramírez-Varela; Carlos Navarro-Vila

2010-01-01

281

Fatores de Sucesso e Insucesso na Implementação de Sistemas de Informação Gerencial: Estudo do Caso do Segmento de Exploração e Produção de Petróleo da Petrobrás S\\/A  

Microsoft Academic Search

Recent studies indicate the existence of an information systems paradox: even the conceptually perfects, many become notorious implementation failures. This study has as main objective, understand the factors that contribute for successful or unsuccessful management information systems. Previous studies identified four main constructos that seem to be related with the success of these systems: (1) complexity, (2) user participation, (3)

Sousa Ferreira

282

LABRANZA Y SISTEMAS DE SIEMBRA PARA LA PRODUCCIÓN DEL CULTIVO DE MAÍZ (Zea mays L.) EN UN AQUIC USTROPEPTS DEL ESTADO YARACUY  

Microsoft Academic Search

Tillage practices and planting systems in corn (Zea mays L.) production on an Aquic Ustropepts of Yaracuy state, Venezuela A trial was conducted in the Fundación Polar experimental field in Yaracuy state, Venezuela in order to evaluate the effect of four tillage practices (TP) and three corn planting systems (PS) on soil physics and crop performance in an Aquic Ustropepts

Felipe Marcano; Noel Landínez

283

O SISTEMA NACIONAL DE INOVAÇÃO E A AÇÃO EMPREENDEDORA NO BRASIL THE NATIONAL INNOVATION SYSTEM AND THE ENTERPRISING ACTION IN BRAZIL  

Microsoft Academic Search

The discussion on innovation is relevant when it comes to understanding the potential of entrepreneurship as a phenomenon that levers the economic development. The results of the gem research, of international extent, show that in spite of Brazil being one of the most enterprising countries, these enterprises are not much innovatory. To understand this scenery, this article's objective is to

SIEGLINDE KINDL DA CUNHA; YARA LUCIA BULGACOV; MARIA LUCIA; FIGUEIREDO MEZA; ZANDRA BALBINOT

284

UNIVERSIDAD SIMON BOLIVAR SEDE DEL LITORAL  

E-print Network

los fundamentos relacionados con los distintos sistemas de telefonía celular, tales como los sistemas operativos. Interfaces terrestres. Sistemas CEPT, SPADE, SCPC,VSAT. Redes satelizares de datos. #12;III

Vásquez, Carlos

285

La papaut de Paul IV travers les sources diplomatiques romaines et vnitiennes. Notes sur l'dition en ligne des dpches de Bernardo Navagero et de Marcantonio Da  

E-print Network

Navagero voir principalement: Agostino VALIER, Bernardi Naugerii S.R.E. cardinalis Veronensis Ecclesiae de cautione adhibenda in edendis libris nec non Bernardi cardinalis Naugerii vita, eodem Valerio

Paris-Sud XI, Université de

286

EL ESTUDIO DEL PLUMBISMO EN DOANA Y OTROS HUMEDALES ANDALUCES  

E-print Network

Doñana y otras zonas principales de invernada..............51 4.1- Introducción .................................................................................................66 5.1- Introducción

Figuerola, Jordi

287

SECCIN DE COMPUTACIN Personal acadmico y temas de investigacin  

E-print Network

investigación: Sistemas operativos, arquitectura de computadoras, redes de computadoras, sistemas distribuidos y investigación: Redes de Petri y sus aplicaciones, red neuronal, lógica difusa, sistemas dinámicos de eventos Software, Sistemas y Redes, Instituto Politécnico de Grenoble, Francia. Duración de la estancia: del 24 de a

288

Fondation Maison des sciences de l'homme -190 avenue de France -75013 Paris -France http://www.msh-paris.fr -FMSH-WP-2014-66  

E-print Network

texte examine d'abord les principales tentatives faites, d'Auguste Comte à Karl Polanyi, en passant par-66 Résumé Ce texte examine d'abord les principales tentatives faites, d'Auguste Comte à Karl Polanyi, en

Boyer, Edmond

289

Ensayo sobre equilibrio general computable: Teoría y aplicaciones  

Microsoft Academic Search

Este documento de trabajo presenta un resumen de la literatura conceptual y aplicada sobre modelos de equilibrio general computables (EGC). Se examinan las principales características de los EGC, las formas en que se construyen, los datos requeridos y métodos de calibración, así como sus ventajas y desventajas. Luego se discuten sus principales aplicaciones tanto en el mundo como en Chile.

Raúl ORyan; Carlos J. de Miguel; Sebastián Miller

2000-01-01

290

Deep PDF parsing to extract features for detecting embedded malware.  

SciTech Connect

The number of PDF files with embedded malicious code has risen significantly in the past few years. This is due to the portability of the file format, the ways Adobe Reader recovers from corrupt PDF files, the addition of many multimedia and scripting extensions to the file format, and many format properties the malware author may use to disguise the presence of malware. Current research focuses on executable, MS Office, and HTML formats. In this paper, several features and properties of PDF Files are identified. Features are extracted using an instrumented open source PDF viewer. The feature descriptions of benign and malicious PDFs can be used to construct a machine learning model for detecting possible malware in future PDF files. The detection rate of PDF malware by current antivirus software is very low. A PDF file is easy to edit and manipulate because it is a text format, providing a low barrier to malware authors. Analyzing PDF files for malware is nonetheless difficult because of (a) the complexity of the formatting language, (b) the parsing idiosyncrasies in Adobe Reader, and (c) undocumented correction techniques employed in Adobe Reader. In May 2011, Esparza demonstrated that PDF malware could be hidden from 42 of 43 antivirus packages by combining multiple obfuscation techniques [4]. One reason current antivirus software fails is the ease of varying byte sequences in PDF malware, thereby rendering conventional signature-based virus detection useless. The compression and encryption functions produce sequences of bytes that are each functions of multiple input bytes. As a result, padding the malware payload with some whitespace before compression/encryption can change many of the bytes in the final payload. In this study we analyzed a corpus of 2591 benign and 87 malicious PDF files. While this corpus is admittedly small, it allowed us to test a system for collecting indicators of embedded PDF malware. We will call these indicators features throughout the rest of this report. The features are extracted using an instrumented PDF viewer, and are the inputs to a prediction model that scores the likelihood of a PDF file containing malware. The prediction model is constructed from a sample of labeled data by a machine learning algorithm (specifically, decision tree ensemble learning). Preliminary experiments show that the model is able to detect half of the PDF malware in the corpus with zero false alarms. We conclude the report with suggestions for extending this work to detect a greater variety of PDF malware.

Munson, Miles Arthur; Cross, Jesse S. (Missouri University of Science and Technology, Rolla, MO)

2011-09-01

291

Cyber-Insurance in Internet Security: A Dig into the Information Asymmetry Problem  

E-print Network

Internet users such as individuals and organizations are subject to different types of epidemic risks such as worms, viruses, spams, and botnets. To reduce the probability of risk, an Internet user generally invests in traditional security mechanisms like anti-virus and anti-spam software, sometimes also known as \\emph{self-defense} mechanisms. However, according to security experts, such software (and their subsequent advancements) will not completely eliminate risk. Recent research efforts have considered the problem of residual risk elimination by proposing the idea of \\emph{cyber-insurance}. In this regard, an important research problem is resolving information asymmetry issues associated with cyber-insurance contracts. In this paper we propose \\emph{three} mechanisms to resolve information asymmetry in cyber-insurance. Our mechanisms are based on the \\emph{Principal-Agent} (PA) model in microeconomic theory. We show that (1) optimal cyber-insurance contracts induced by our mechanisms only provide partial...

Pal, Ranjan

2012-01-01

292

Inhibition of HIV-1 replication by vesicular stomatitis virus envelope glycoprotein pseudotyped baculovirus vector-transduced ribozyme in mammalian cells.  

PubMed

The baculovirus has recently emerged as a promising vector for in vivo gene therapy. To investigate its potential as a delivery vector for an anti-virus ribozyme targeting HIV-1, we constructed recombinant baculovirus vectors bearing a ribozyme-synthesizing cassette driven by the tRNA(i)(Met) promoter with enhanced transduction efficiency by displaying vesicular stomatitis virus glycoprotein (VSV-G) on the viral envelope. Transduction of HeLa CD4(+) cells with a recombinant baculovirus delivering the HIV-1 U5 gene-specific ribozyme dramatically suppressed HIV-1 expression in this cell line. The VSV-G pseudotyped baculovirus vector-transduced ribozyme potently inhibited HIV-1 replication compared to a recombinant baculovirus vector-transduced ribozyme lacking VSV-G. The use of a baculovirus vector might be beneficial for application in gene therapy. PMID:16979590

Kaneko, Hiroyasu; Suzuki, Hitoshi; Abe, Takashi; Miyano-Kurosaki, Naoko; Takaku, Hiroshi

2006-11-01

293

[Roles of geldanamycin biosynthetic genes in Streptomyces hygroscopicus 17997].  

PubMed

Geldanamycin (Gdm), an inhibitor of heat shock protein 90 (Hsp90), shows antitumor and antivirus bioactivity. Most Geldanamycin biosynthetic genes have been cloned from the genome library of Streptomyces hygroscopicus 17997. In this report, polyketide synthase (pks) gene, mono-oxygenase (gdmM) gene and carbamoyltransferase gene (gdmN) were subjected to inactivation. Three gene disrupted mutants (deltapks, deltagdmM and deltagdmN) were obtained by double crossover. No Geldanamycin production was detected in three mutant strains cultured in fermentation broth. Gene complementation experiments excluded the possible polar effect of gene disruption on other genes. These results confirmed that pks, gdmM and gdmN genes were essential for Geldanamycin biosynthesis. PMID:18837385

He, Weiqing; Liu, Yuying; Sun, Guizhi; Wang, Yiguang

2008-07-01

294

[Chronic HBsAg negative hepatitis in childhood, Stud using the immunofluorescence method].  

PubMed

13 children with chronic HBsAg negative hepatitis were examined in this work with the I.F. method. Comparison can be made with a previous work on chronic HBsAg positive hepatitis. 8 of these patients were cases of ECP, 1 was a ECA-A and 4 were ECA-B. Research has been done to point out immunoglobulins and immunocomplexes in the liver and serum. On the whole, fluorescence was less both in liver and serum than fluorescence in chronic HBsAg positive hepatitis. Reasons of it can be: the absence of anti-virus B antibodies (HBcAb, delta-Ab, HBsAb), the relative lightness of our cases and, probably, a better answer of HBsAg negative hepatitis than of HBsAg positive one to immunodepressive treatment. PMID:7034745

Calzia, R; Ciravegna, B; Navone, C; Tolentino, P

1981-07-31

295

Synthesis and biological evaluation of fucoidan-mimetic glycopolymers through cyanoxyl-mediated free-radical polymerization.  

PubMed

The sulfated marine polysaccharide fucoidan has been reported to have health benefits ranging from antivirus and anticancer properties to modulation of high blood pressure. Hence, they could enhance the biological function of materials for biomedical applications. However, the incorporation of fucoidan into biomaterials has been difficult, possibly due to its complex structure and lack of suitable functional groups for covalent anchoring to biomaterials. We have developed an approach for a rapid synthesis of fucoidan-mimetic glycopolymer chains through cyanoxyl-mediated free-radical polymerization, a method suitable for chain-end functionalizing and subsequent linkage to biomaterials. The resulting sulfated and nonsulfated methacrylamido ?-L-fucoside glycopolymers' fucoidan-mimetic properties were studied in HSV-1 infection and platelet activation assays. The sulfated glycopolymer showed similar properties to natural fucoidan in inducing platelet activation and inhibiting HSV-1 binding and entry to cells, thus indicating successful syntheses of fucoidan-mimetic glycopolymers. PMID:24813544

Tengdelius, Mattias; Lee, Chyan-Jang; Grenegård, Magnus; Griffith, May; Påhlsson, Peter; Konradsson, Peter

2014-07-14

296

Metamorphic Virus Variants Classification Using Opcode Frequency Histogram  

E-print Network

In order to prevent detection and evade signature-based scanning methods, which are normally exploited by antivirus software, metamorphic viruses use several various obfuscation approaches. They transform their code in new instances as look entirely or partly different and contain dissimilar sequences of string, but their behavior and function remain unchanged. This obfuscation process allows them to stay away from the string based signature detection. In this research, we use a statistical technique to compare the similarity between two files infected by two morphed versions of a given metamorphic virus. Our proposed solution based on static analysis and it uses the histogram of machine instructions frequency in various offspring of obfuscated viruses. We use Euclidean histogram distance metric to compare a pair of portable executable (PE) files. The aim of this study is to show that for some particular obfuscation methods, the presented solution can be exploited to detect morphed varieties of a file. Hence,...

Rad, Babak Bashari

2011-01-01

297

Design, Synthesis and Antiviral Activity Studies of Schizonepetin Derivatives  

PubMed Central

A series of schizonepetin derivatives have been designed and synthesized in order to obtain potent antivirus agents. The antiviral activity against HSV-1 and influenza virus H3N2 as well as the cytotoxicity of these derivatives was evaluated by using cytopathic effect (CPE) inhibition assay in vitro. Compounds M2, M4, M5 and M34 showed higher inhibitory activity against HSV-1 virus with the TC50 values being in micromole. Compounds M28, M33, and M35 showed higher inhibitory activity against influenza virus H3N2 with their TC50 values being 96.4, 71.0 and 75.4 ?M, respectively. Preliminary biological activity evaluation indicated that the anti-H3N2 and anti-HSV-1 activities improved obviously through the introduction of halogen into the structure of schizonepetin. PMID:23965980

Bao, Beihua; Meng, Zheng; Li, Nianguang; Meng, Zhengjie; Zhang, Li; Cao, Yudan; Yao, Weifeng; Shan, Mingqiu; Ding, Anwei

2013-01-01

298

Stay Safe Online  

NSDL National Science Digital Library

Sponsored by the National Cyber Security Alliance, Stay Safe Online works to educate the public on the importance of protecting their personal computers from online intruders. If proper security procedures are not implemented, computers can become victims to viruses, denial of service attacks, Trojan horse programs, and other malicious activities that take advantage of computer vulnerabilities and result in billions of dollars of damage. Designed to provide information needed to protect home and small business computers, this Web site provides the top ten security tips on how to safeguard computer systems, such as using anti-virus software, not opening e-mail from unknown sources, and backing up computer data. The site also contains a self-guided cyber security test, educational materials, and links to other Internet security sources. In all, this is an important resource for all computer users to explore.

2007-08-09

299

[Advance in studies on effective components in wheat bran and their pharmacological activities].  

PubMed

Wheat bran, as the testa of wheat, has a long history of medication. Modern studies have discovered that wheat bran contains dietary fiber, phenolic compounds, proteins, vitamins, minerals and many other compounds, and boasts wide pharmacological activities such as blood glucose reduction, hypertension reduction, lipid reduction, anti-oxidation, anti-bacteria, anti-inflammatory, antivirus, prevention of colon cancer and mutations, immunomodulation and adsorption of heavy metals. With great development and utilization values, wheat bran has long attracted wide attention from Chinese and foreign scholars. The paper summarizes the latest advance in domestic and foreign studies on effective components in wheat bran and their pharmacological effect, and gives a brief introduction of the limiting factors in the comprehensive development and utilization of wheat bran, in order to provide new preference for the development and utilization of abundant wheat bran resources in China. PMID:24761627

Zhang, Yi; Li, Yu; Wang, Jian; Yang, Ya-Li; Yuan, Lv-Jiang

2014-01-01

300

The effect of infected external computers on the spread of viruses: A compartment modeling study  

NASA Astrophysics Data System (ADS)

Inevitably, there exist infected computers outside of the Internet. This paper aims to understand how infected external computers affect the spread of computer viruses. For that purpose, a new virus-antivirus spreading model, which takes into account the effect of infected/immune external computers, is established. A systematic study shows that, unlike most previous models, the proposed model admits no virus-free equilibrium and admits a globally asymptotically stable viral equilibrium. This result implies that it would be practically impossible to eradicate viruses on the Internet. As a result, inhibiting the virus prevalence to below an acceptable level would be the next best thing. A theoretical study reveals the effect of different parameters on the steady virus prevalence. On this basis, a number of suggestions are made so as to contain virus spreading.

Yang, Lu-Xing; Yang, Xiaofan

2013-12-01

301

Pricing and Investments in Internet Security: A Cyber-Insurance Perspective  

E-print Network

Internet users such as individuals and organizations are subject to different types of epidemic risks such as worms, viruses, spams, and botnets. To reduce the probability of risk, an Internet user generally invests in traditional security mechanisms like anti-virus and anti-spam software, sometimes also known as self-defense mechanisms. However, such software does not completely eliminate risk. Recent works have considered the problem of residual risk elimination by proposing the idea of cyber-insurance. In this regard, an important research problem is the analysis of optimal user self-defense investments and cyber-insurance contracts under the Internet environment. In this paper, we investigate two problems and their relationship: 1) analyzing optimal self-defense investments in the Internet, under optimal cyber-insurance coverage, where optimality is an insurer objective and 2) designing optimal cyber-insurance contracts for Internet users, where a contract is a (premium, coverage) pair.

Pal, Ranjan

2011-01-01

302

ISOLATION OF CAFFEIC ACID FROM EUPATORIUM ADENOPHORUM SPRENG BY HIGH-SPEED COUNTERCURRENT CHROMATOGRAPHY AND SYNTHESIS OF CAFFEIC ACID-INTERCALATED LAYERED DOUBLE HYDROXIDE  

PubMed Central

Preparative high-speed countercurrent chromatography (HSCCC) was successfully used for isolation and purification of caffeic acid from Eupatorium adenophorum Spreng with a solvent system composed of ethyl acetate-methanol-water at a volume ratio of 10:1:10, v/v. Using a preparative unit of the HSCCC centrifuge, about a 938 mg amount of the crude extract was separated, yielding 63.2 mg of caffeic acid at purity of 96.0%. Then, the anti-microbial and anti-virus drug caffeic acid (C9H8O4) was intercalated into layered double hydroxides for the first time by anion exchange under a nitrogen atmosphere. The product caffeic acid–LDH has been characterized by powder X-ray diffraction (XRD), Fourier transform-infrared (FT-IR), Scanning electron micrographs (SEM), indicating that the drug has been successfully intercalated into LDH. PMID:20454592

Wei, Yun; Gao, Yali; Zhang, Kai; Ito, Yoichiro

2010-01-01

303

ISOLATION OF CAFFEIC ACID FROM EUPATORIUM ADENOPHORUM SPRENG BY HIGH-SPEED COUNTERCURRENT CHROMATOGRAPHY AND SYNTHESIS OF CAFFEIC ACID-INTERCALATED LAYERED DOUBLE HYDROXIDE.  

PubMed

Preparative high-speed countercurrent chromatography (HSCCC) was successfully used for isolation and purification of caffeic acid from Eupatorium adenophorum Spreng with a solvent system composed of ethyl acetate-methanol-water at a volume ratio of 10:1:10, v/v. Using a preparative unit of the HSCCC centrifuge, about a 938 mg amount of the crude extract was separated, yielding 63.2 mg of caffeic acid at purity of 96.0%. Then, the anti-microbial and anti-virus drug caffeic acid (C(9)H(8)O(4)) was intercalated into layered double hydroxides for the first time by anion exchange under a nitrogen atmosphere. The product caffeic acid-LDH has been characterized by powder X-ray diffraction (XRD), Fourier transform-infrared (FT-IR), Scanning electron micrographs (SEM), indicating that the drug has been successfully intercalated into LDH. PMID:20454592

Wei, Yun; Gao, Yali; Zhang, Kai; Ito, Yoichiro

2010-01-01

304

On-Site Wastewater Treatment Systems: Pump Tank (Spanish)  

E-print Network

?n dosificadas en intervalos al suelo. Los tanques bomba forman parte de varios tipos de sistemas individuales de distribuci?n de aguas negras, entre ellos, los sistemas de dosificaci?n de baja presi?n, los sistemas de goteo subterr?neo y los sistemas de rociado... de bombas: bombas de baja carga y bombas de alta carga. Las bombas de baja carga se usan en sistemas que procesan relativamente grandes vol?menes de agua a baja presi?n; entre estos sistemas, se encuen- tran los campos de drenaje de efluente bombeado...

Lesikar, Bruce J.; Enciso, Juan

2000-08-29

305

Exchange Rate Regime Shift in Reaction to a Changing Environment: A Case Study of Kuwait - Modifiche del regime dei tassi di cambio a seguito di modifiche nelle condizioni del sistema: il caso del Kuwait  

Microsoft Academic Search

Two propositions are verified about the exchange rate regime of a basket peg, which is adopted by some developing countries. The first is that by pegging the domestic currency to an import-weighted basket, the economy can be insulated from the imported inflation resulting purely from change in exchange rates. The second proposition is that profitable arbitrage can be conducted by

Imad A. Moosa

2011-01-01

306

Optimización del sistema gastrorretentivo para la administración oral controlada de cinarizina mediante la metodología de superficie de respuesta Optimization of Gastroretentive System for Oral Controlled Delivery of Cinnarizine Using Response Surface Methodology  

Microsoft Academic Search

3 . Se estudiaron los efectos de variables de formulación como los niveles de HPMC K4M (X1), bicarbonato sódico (X2) y ácido cítrico (X3) en las características de fl otabilidad del comprimido y la liberación de fármaco. Los parámetros de respuesta como el tiempo de fl otabilidad total (TFT), la liberación al cabo de 10 h (Rel10), el tiempo necesario

SHIVAKUMAR HN; DESAI BG; PATEL M

307

Pautas para Organizar Una Actividad de Capacitacion: Un Seminario-Taller para el Desarrollo de Personal de Direccion de Sistemas Educativos (Guidelines to Organize a Training Activity: A Workshop for Management Development of Educational Systems).  

ERIC Educational Resources Information Center

Often personnel performing managerial functions within educational systems are educators with almost no training in management. This paper presents ideas on how to organize a training activity intended to develop management knowledge and skills among educational systems officials and to implement an organizational self-study on management…

Valle, Victor M.

308

Primera Reunion de la Comision Nacional de Analisis y Evaluacion del Sistema Educativo: Informe Final (The First Meeting of the National Committee for Analysis and Evaluation of the Educational System: Final Report).  

ERIC Educational Resources Information Center

This document contains the legislation creating the National Committee for Analysis and Evaluation of the Educational System and the final report of that committee's first meeting. The report deals with each level from elementary to higher education. For each level it describes and considers curriculum, school buildings, human resources, current…

Ministerio de Cultura y Educacion, Buenos Aires (Argentina). Centro National de Documentacion e Informacion Educativa.

309

La Capacitacion de Docentes Como Prioridad de los Sistemas Educativos de America Latino y al Caribe (In-Service Teacher Training as a Priority of Latin American and Caribbean Educational Systems).  

ERIC Educational Resources Information Center

Whenever top-level officials in Latin American and Caribbean educational systems are approached, the topic of inservice teacher training is presented as a major priority. This paper outlines some ideas about the subject of inservice teacher training as a priority of educational systems in Latin American and Caribbean countries. The most frequent…

Valle, Victor M.

310

Verbale della Commissione per il conferimento di n.1 incarico di collaborazione per l'attivit di "Inserimento dei dati richiesto nella sezione GOMP del sistema informativo SIAD relativamente ai  

E-print Network

. Luca Giuliano - Prof. Luca Tardella - Sig.ra Fara Volpe Le funzioni di Presidente saranno esercitate dal Prof.Luca Giuliano e di segretario verbalizzante dalla Sig.ra Fara Volpe. Domande pervenute n. 1. Luca Giuliano Prof. Luca Tardella Sig.ra Fara Volpe Roma, 29. 07. 2010 #12;

Guidoni, Leonardo

311

Memorias Conferencia Internacional IEEE Mexico 1971, Sobre Sistemas, Redes Y Computadoras. Volumen I and Volumen II. (Proceedings of International Conference of IEEE Concerning Systems, Networks, and Computers. Volume I and Volume II.  

ERIC Educational Resources Information Center

The following papers in English from this international conference may be of particular interest to those in the field of education. T. Nakahara, A. Tsukamota, and M. Matsumoto describe a computer-aided design technique for an economical urban cable television system. W. D. Wasson and R. K. Chitkara outline a recognition scheme based on analysis…

Concheiro, A. Alonso, Ed.; And Others

312

Silvestre Francs, Eva M La Obra Social de Caixa Ontinyent como dinamizadora del desarrollo local en la comarca de laVall Urbieta Iceta, Elisabet Sistemas productivos locales y territorio. Instrumentos para el fomento de la innovacin y el Em-  

E-print Network

la Seguridad Ciudadana como herramienta de revitalización y desarrollo para la comunidad. Yago, participación e identidad. Luces y sombras en el marco de la Iniciativa LEADER Martínez Puche, A. et alii La al desarrollo local. El diario ´La Opinión-El Correo de Zamora´ en la

Escolano, Francisco

313

Investigacion educativa. El sistema escolar en sus diferentes niveles, factores que favorecen o frenan su eficacia y medidas de superacion (Educational Research. The Educational System at Different Levels; Factors Promoting or Hindering Its Efficiency; Possible Improvements.  

ERIC Educational Resources Information Center

This document is an English-language abstract (Approximately 1,500 words) of a study on educational research in Mexico. Chapter one discusses the importance of educational research, in terms of its role both in scientific and technical development; it should use scientific methods so that it will have solid foundations. Chapter two is a survey of…

Jimenez Lozano, Blanca; And Others

314

Sistema de Tabulaci on de Coecientes Binomiales o Tri angulo de Pascal: un Modelo Num erico Rasga el Telar de los Tiempos Binomial Coecients' Tabulation System or Pascal's Triangle: a Numeric Model Rips the Loom of Time  

Microsoft Academic Search

One of the most famous numeric models of the History of Mathematics, Pascal's triangle, shows us its origin and shuttling throug the loom of time, since its oriental creation, almost magi- cal and forgotten, until becoming rooted in the occidental world.

Mara Cristina; Solaeche Galera

315

O Uso de Sistema de Informações Geográficas na Determinação da Aptidão de Áreas Rurais para a Recreação e Turismo: O Caso da Microbacia do Ribeirão São Bartolomeu, Viçosa, Minas Gerais  

Microsoft Academic Search

This study used the multiple criteria strategy to determine the availability of recreation and turism activities in the Ribeirão São Bartolomeu Watershed, county on Viçosa-MG, Brazil. The results indicated that 1840,50 ha (36,39%) of the area have high suitability, 2997,30 ha (59,27%) medium and 219,60 ha (4,34%) are unsuitability.

LIZÏT ALENCAR DA COSTA

316

El desarrollo humano integral, la teoría de sistemas y el concepto de competencias en el ámbito académico universitario Integral human development and the concept of competitions in the university academic environment  

Microsoft Academic Search

RESUMEN: la Educación puede ser considerada como un proceso social, en el cual cada actividad y cada actor del proceso, deben tender hacia un desarrollo humano integral. En este sentido, el desarrollo humano podría ser visto como un promo - tor y conductor de mejora tanto personal como social. Hoy en día, sin embargo, la economía de libre mercado, es

Comunicación Técnica; Hilda L. Cárdenas

317

Note. Shelf life of a saturated vitamin E carrier system for use in the food industry \\/ Nota. Vida útil de un sistema de microencapsulación de vitamina E para alimentos  

Microsoft Academic Search

Dimyristoylphosphatidylcholine liposomes containing different concentrations of vitamin E (0, 5, 15 and 25%) were prepared by extrusion through 100 nm pore size filters, and stored at 5 °C in the dark under an oxygen atmosphere. The physico-chemical characteristics chosen as shelf life indicators for this vitamin E-carrier system were vitamin E fluorescence, mean diameter of the system, products of phospholipid

M. C. Berrocal; A. Abeger

1999-01-01

318

Diseño de Sistemas de Memoria Cache de Alto Rendimiento aplicando Algoritmos de Acceso Seudo-Especulativo Design of High Performance Cache Memory Systems applying Pseudo-Speculative Access Algorithm  

Microsoft Academic Search

The gap between the cycle time of processor and the access time to memory go on being eminent. The processor performance increases about 60% by year because of reduction of cycle time and the rise in the number of instruction processed by cy cle. Nevertheless, DRAM memories access time only reach an improvement about 10% by year although capacity is

Oscar Camacho Nieto; Juan de Dios; Gustavo A. Madero

319

MANEJO DE LOS DESPRENDIMIENTOS DE RETINA REGMATÓGENOS URGENTES EN EL SISTEMA NACIONAL DE SALUD DE ESPAÑA. PROYECTO RETINA 2 URGENT RETINAL DETACHMENT MANAGEMENT BY THE NATIONAL HEALTH SYSTEM OF SPAIN. PROJECT RETINA 2  

Microsoft Academic Search

Objective: To identify problems in the urgent management of retinal detachments (RD) in hospi- tals of the Spanish National Health System (NHS). Methods: A questionnaire was submitted confiden- tially to the heads of Ophthalmic Departments of 217 hospitals of the NHS to obtain information on the management of urgent RD during the last year. Data was stored in a Microsoft

ROJAS J; FERNÁNDEZ I; PASTOR JC; GÓMEZ-ULLA F; PIÑERO A

320

Sistema de pastejo, rotenona e controle de parasitas em bovinos cruzados: efeito no ganho de peso e no parasitismo Grazing systems, rotenone and parasites control in crossbred calves: effect on live weight gain and on parasites burdens  

Microsoft Academic Search

Practices for endo and ectoparasite control in beef cattle were evaluated in two independent experiments. First, the effects of rotenone® on Rhipicephalus (Boophilus) microplus ticks were evaluated in vitro and in experimentally infected calves. In the second trial, the effects of grazing systems associated with endo and ectoparasite treatments on parasite burden and weight gain of naturally parasited animals were

João B. Catto; Ivo Bianchin; Jânio M. Santurio; Gelson L. D. Feijó; Armindo N. Kichel; José M. da Silva

2009-01-01

321

Productividad primaria del fitoplancton en la zona eufótica del Sistema de la Corriente de California estimada mediante imágenes del CZCS Phytoplankton primary productivity in the euphotic zone of the California Current System estimated from CZCS imagery  

Microsoft Academic Search

We estimated phytoplankton primary productivity (PP) in the euphotic zone of the California Current System using chlorophyll concentration (Chl) from CZCS imagery. The area was divided into two regions, Southern California (SC) and Baja California (BC), with inshore and offshore subregions, and into two seasons, cool and warm. The Chl and PP values were in general higher and more variable

OA Barocio-León; R Millán-Núñez; E Santamaría-del-Ángel; A González-Silvera

322

Pseudoneoplasia calcificante del sistema nervioso central. A propósito de un caso y revisión de la literatura Calcifying pseudoneoplasm of the central nervous system. A case report and a review of the literature  

Microsoft Academic Search

SUMMARY A 55-year-old immunocompetent woman, with a history of a resected meningioma 12 years previously, was found to have an intraaxial calcified mass in the same area of the pre- vious tumour by CT. A craniotomy was performed and the mass was completely excised. Macroscopically, the lesion consisted of multiple fragments of irregular, gritty, almost calcified tissue, measuring approximately 2

Rosario Serrano Pardo; Ana Belén; Enguita Valls; Hugo Santos Benítez; Alfredo Sánchez Bustos

323

Attivo dal 2008, il cluster multidisciplinare di ricerca sui Tessili innovativi con sede presso il dipartimento ABC, ha lo scopo di mettere a sistema le competenze specialistiche presenti all'interno del Politecnico di  

E-print Network

. The fulcrum of the clusTEX activities is the station of biaxial tests for technical textiles for the study, the multidisciplinary research cluster on innovative textiles aims to systematize the expertise present within the Politecnico di Milano on the subject of textile materials and advanced composites and to support research

324

Bu informaInformativo mensal do Sistema de Bibliotecas da Universidade Federal de Santa Catarina n 10 -dez/12 a mar/13 www.portalbu.ufsc.br Novas Aquisies  

E-print Network

, chamados de "Guardiões das Tábuas" e "Mestres dos Livros". No século VII a.C., o rei da Assíria en América Latina y el Caribe), o Brasil é o país latino que mais empresta livros de bibliotecas. Em 2012, 26% dos livros lidos pelos brasileiros vieram de bibliotecas. No México, em segundo lugar, foram

Floeter, Sergio Ricardo

325

Hydrochemical tracers in the middle Rio Grande Basin, USA: 1. Conceptualization of groundwater flow  

NASA Astrophysics Data System (ADS)

Chemical and isotopic data for groundwater from throughout the Middle Rio Grande Basin, central New Mexico, USA, were used to identify and map groundwater flow from 12 sources of water to the basin, evaluate radiocarbon ages, and refine the conceptual model of the Santa Fe Group aquifer system. Hydrochemical zones, representing groundwater flow over thousands to tens of thousands of years, can be traced over large distances through the primarily siliciclastic aquifer system. The locations of the hydrochemical zones mostly reflect the ``modern'' predevelopment hydraulic-head distribution, but are inconsistent with a trough in predevelopment water levels in the west-central part of the basin, indicating that this trough is a transient rather than a long-term feature of the aquifer system. Radiocarbon ages adjusted for geochemical reactions, mixing, and evapotranspiration/dilution processes in the aquifer system were nearly identical to the unadjusted radiocarbon ages, and ranged from modern to more than 30 ka. Age gradients from piezometer nests ranged from 0.1 to 2 year cm-1 and indicate a recharge rate of about 3 cm year-1 for recharge along the eastern mountain front and infiltration from the Rio Grande near Albuquerque. There has been appreciably less recharge along the eastern mountain front north and south of Albuquerque. Des données sur les éléments chimiques et les isotopes présents dans l'eau souterraine prélevée à divers endroits dans le bassin moyen du Rio Grande, au centre du Nouveau-Mexique (É-U), ont permis de déterminer l'existence et l'étendue de douze sources d'eau régionales dans le bassin, d'évaluer les âges radiocarbones et de raffiner le modèle conceptuel du système aquifère du groupe de Santa Fe. Des zones hydro-chimiques qui représentent l'écoulement de l'eau souterraine depuis des dizaines de milliers d'années peuvent être suivies sur de longues distances à travers l'aquifère principalement siliclastique. La position des zones hydro-chimiques reflète principalement la distribution moderne des charges hydrauliques mais est incohérente avec une dépression dans le niveau d'eau dans la partie centre-ouest du bassin, ce qui indique que cette dépression est un élément transitoire du système aquifère plutôt qu'un élément à long terme. Les âges radiocarbones ajustés aux réactions géochimiques et aux processus de mélange et d'évapotranspiration/dilution qui ont lieu dans l'aquifère sont presque identiques aux âges non ajustés et varient de la période moderne jusqu'à 30 ka. Les gradients d'âge établis à partir des nids de piézomètres s'étendent de 0.1 à 2 a cm-1 et suggèrent un taux de recharge d'environ 3 cm a-1 le long du front des montagnes à l'est et pour l'infiltration provenant du Rio Grande près d'Albuquerque. Il y a eu substantiellement moins de recharge le long du front des montagnes à l'est, au nord et au sud d'Albuquerque. Se utilizaron datos químicos e isotópicos de agua subterránea a lo largo de la cuenca central del río Grande, Nuevo México, EEUU, para identificar y mapear el flujo de agua subterránea de 12 fuentes de agua a la cuenca para evaluar edades por medio de radio carbon y para refinar el modelo conceptual del sistema acuífero del Grupo Santa Fé. Se puede establecer zonas hidrotérmicas que representan el flujo de agua subterránea a lo largo de miles a miles de decenas de años en grandes distancias a través del sistema acuífero principalmente siliclástico. Las ubicaciones de las zonas hidroquímicas mayormente reflejan la distribucion de la cabeza hidráulica pre-desarollo moderna pero son inconsistentes con una depresión en los niveles de agua pre-desarollo en la zona central oeste de la cuenca. Esto indica que esta depresión es un rasgo transitorio y no un rasgo de largo plazo del sistema acuífero. Las edades de radio carbon ajustadas para los procesos de reaciones geoquímicas, de mezclado y de evapotranspiración-dilución son casi idénticas a los edades de radio carbon no ajustadas oscilan en un rango desde la

Plummer, L. Niel; Bexfield, Laura M.; Anderholm, Scott K.; Sanford, Ward E.; Busenberg, Eurybiades

326

Lack of security of networked medical equipment in radiology.  

PubMed

OBJECTIVE. There are few articles in the literature describing the security and safety aspects of networked medical equipment in radiology departments. Most radiologists are unaware of the security issues. We review the security of the networked medical equipment of a typical radiology department. MATERIALS AND METHODS. All networked medical equipment in a radiology department was scanned for vulnerabilities with a port scanner and a network vulnerability scanner, and the vulnerabilities were classified using the Common Vulnerability Scoring System. A network sniffer was used to capture and analyze traffic on the radiology network for exposure of confidential patient data. We reviewed the use of antivirus software and firewalls on the networked medical equipment. USB ports and CD and DVD drives in the networked medical equipment were tested to see whether they allowed unauthorized access. Implementation of the virtual private network (VPN) that vendors use to access the radiology network was reviewed. RESULTS. Most of the networked medical equipment in our radiology department used vulnerable software with open ports and services. Of the 144 items scanned, 64 (44%) had at least one critical vulnerability, and 119 (83%) had at least one high-risk vulnerability. Most equipment did not encrypt traffic and allowed capture of confidential patient data. Of the 144 items scanned, two (1%) used antivirus software and three (2%) had a firewall enabled. The USB ports were not secure on 49 of the 58 (84%) items with USB ports, and the CD or DVD drive was not secure on 17 of the 31 (55%) items with a CD or DVD drive. One of three vendors had an insecure implementation of VPN access. CONCLUSION. Radiologists and the medical industry need to urgently review and rectify the security issues in existing networked medical equipment. We hope that the results of our study and this article also raise awareness among radiologists about the security issues of networked medical equipment. PMID:25615757

Moses, Vinu; Korah, Ipeson

2015-02-01

327

Baculoviruses modulate a proapoptotic DNA damage response to promote virus multiplication.  

PubMed

The baculovirus Autographa californica multicapsid nucleopolyhedrovirus (AcMNPV) initiates apoptosis in diverse insects through events triggered by virus DNA (vDNA) replication. To define the proapoptotic pathway and its role in antivirus defense, we investigated the link between the host's DNA damage response (DDR) and apoptosis. We report here that AcMNPV elicits a DDR in the model insect Drosophila melanogaster. Replication of vDNA activated DDR kinases, as evidenced by ATM-driven phosphorylation of the Drosophila histone H2AX homolog (H2Av), a critical regulator of the DDR. Ablation or inhibition of ATM repressed H2Av phosphorylation and blocked virus-induced apoptosis. The DDR kinase inhibitors caffeine and KU55933 also prevented virus-induced apoptosis in cells derived from the permissive AcMNPV host, Spodoptera frugiperda. This block occurred at a step upstream of virus-mediated depletion of the cellular inhibitor-of-apoptosis protein, an event that initiates apoptosis in Spodoptera and Drosophila. Thus, the DDR is a conserved, proapoptotic response to baculovirus infection. DDR inhibition also repressed vDNA replication and reduced virus yields 100,000-fold, demonstrating that the DDR contributes to virus production, despite its recognized antivirus role. In contrast to virus-induced phosphorylation of Drosophila H2Av, AcMNPV blocked phosphorylation of the Spodoptera H2AX homolog (SfH2AX). Remarkably, AcMNPV also suppressed SfH2AX phosphorylation following pharmacologically induced DNA damage. These findings indicate that AcMNPV alters canonical DDR signaling in permissive cells. We conclude that AcMNPV triggers a proapoptotic DDR that is subsequently modified, presumably to stimulate vDNA replication. Thus, manipulation of the DDR to facilitate multiplication is an evolutionarily conserved strategy among DNA viruses of insects and mammals. PMID:23035220

Mitchell, Jonathan K; Friesen, Paul D

2012-12-01

328

On-Site Wastewater Treatment Systems: Spray Distribution System (Spanish)  

E-print Network

Dispositivo de desinfecci?n Tanque bomba Rociadores Dispositivo para tratamiento de aguas negras Sistemas individuales para el tratamiento de aguas negras Sistema de distribuci?n por aspersi?n con rociadores Bruce Lesikar y Juan Enciso Promotores...

Lesikar, Bruce J.; Enciso, Juan

2002-04-18

329

Geostatistical mapping of leakance in a regional aquitard, Oak Ridges Moraine area, Ontario, Canada  

NASA Astrophysics Data System (ADS)

The Newmarket Till forms a regionally extensive aquitard separating two major aquifer systems in the Greater Toronto area, Canada. The till is incised, and sometimes eroded entirely, by a network of sand- and gravel-filled channels forming productive aquifers and, locally, high-conductivity windows between aquifer systems. Leakage through the till may also be substantial in places. This study investigates the spatial variability of aquitard leakance in order to assess the relative importance of recharge processes to the lower aquifers. With a large database derived from water-well records and containing both hard and soft information, the Sequential Indicator Simulation method is used to generate maps of aquitard thickness and window probability. These can be used for targeting channel aquifers and for identifying potential areas of recharge to the lower aquifers. Conductivities are modeled from sparse data assuming that their correlation range is much smaller than the grid spacing. Block-scale leakances are obtained by upscaling nodal values based on simulated conductivity and thickness fields. Under the "aquifer-flow'' assumption, upscaling is performed by arithmetic spatial averaging. Histograms and maps of upscaled leakances show that heterogeneities associated with aquitard windows have the largest effect on regional groundwater flow patterns. Résumé. La moraine glaciaire de Newmarket constitue un imperméable d'extension régionale séparant deux systèmes aquifères dans la région du Grand Toronto (Canada). La moraine est entaillée, et parfois entièrement érodée, par un réseau de chenaux comblés de sables et de graviers formant des aquifères productifs et, localement, des «fenêtres», zones à forte conductivité hydraulique reliant les systèmes aquifères. Une drainance au travers de la moraine peut également être significative par endroits. Cette étude s'intéresse à la variabilité spatiale de la drainance au travers de l'imperméable, dans le but d'évaluer l'importance relative des processus d'alimentation des aquifères inférieurs. À partir d'une vaste base de données constituée par les mesures faites dans les puits et contenant des informations à la fois certaines et incertaines, la méthode de simulation par indicateur séquentiel est utilisée pour créer des cartes d'épaisseur de l'imperméable et de probabilité d'existence des fenêtres. Ces cartes peuvent être utilisées pour mettre en évidence les aquifères de chenaux et pour identifier les zones potentielles de recharge des aquifères inférieurs. Les conductivités hydrauliques sont modélisées à partir de données clairsemées en supposant que leur gamme de corrélation est beaucoup plus faible que le pas de la grille. La drainance à l'échelle des blocs est obtenue par accroissement du niveau d'échelle des valeurs nodales basé sur les champs de conductivité simulée et des épaisseurs. À partir de l'hypothèse d'écoulement dans l'aquifère, l'accroissement d'échelle est réalisé en faisant une moyenne arithmétique spatiale. Des histogrammes et des cartes de drainance avec accroissement d'échelle montrent que les hétérogénéités associées aux fenêtres dans l'imperméable constituent l'effet le plus important dans l'organisation des écoulements souterrains régionaux. Resumen. El Till de Newmarket forma un acuitardo de extensión regional que separa dos sistemas acuíferos principales en la zona de Greater Toronto (Canadá). El till está horadado, y a veces completamente erosionado, por una red de canales rellenos de arena y grava. Estos constituyen acuíferos productivos y, localmente, conexiones de alta permeabilidad entre sistemas acuíferos. El goteo a través del till puede ser fundamental en ciertos lugares. Este estudio investiga la variabilidad espacial del goteo desde el acuitardo con el fin de establecer la importancia relativa de los procesos de recarga hacia los acuíferos inferiores. Se ha utilizado el método de la Simulación Indicadora Secuencial, soportado por una gran base de dato

Desbarats, A. J.; Hinton, M. J.; Logan, C. E.; Sharpe, D. R.

2001-01-01

330

SECCIN DE COMPUTACIN Personal acadmico y temas de investigacin  

E-print Network

, redes de computadoras, sistemas distribuidos y lenguaje de programación de sistemas en tiempo real), redes de Petri y sus aplicaciones, sistemas expertos, redes neuronales, lógica difusa. lixo: Fundamentos matemáticos de computación, códigos y criptografía, inteligencia artificial. gmorales

331

Las difíciles relaciones entre teoría, práctica y metodología en la psicología del siglo XXI. (I) Sobre algunas disyuntivas  

Microsoft Academic Search

Las decisiones prácticas en las ciencias del comportamiento se han venido apoyando en conocimientos supuestamente obtenidos a partir de indagaciones que, también supuestamente, siguen las normas de la investigación científica. Retomar la distinción entre sistemas sociales y epistemológicos implicada en la oposición entre el sistema ciencia-técnica y el sistema interacción-comunicación permite entender por qué la llamada “investigación científica” en el

Juan Delgado Sánchez-Mateos

2008-01-01

332

La misin New Horizons a Plutn, el Cinturn de Kuiper, y ms all  

E-print Network

: 450 kg Cameras: 60 kg #12;#12;#12;#12;#12;#12;#12;#12;Jupiter Saturn Uranus el Sol Nuestro Sistema Solar #12;Jupiter Saturn Uranus Júpiter el Sol Nuestro Sistema Solar #12;Jupiter Saturn Uranus Júpiter Saturno el Sol Nuestro Sistema Solar #12;Jupiter Saturn Uranus Júpiter Saturno Urano el Sol Nuestro

Throop, Henry

333

El Informe Anual a la Nación indica que las tasas de mortalidad por cáncer continúan declinando. Se observan tasas menores de cáncer en las poblaciones latinas de los Estados Unidos.  

Cancer.gov

Un informe nuevo de las principales organizaciones oncológicas de la nación informa que el riesgo de los estadounidenses de morir por cáncer continúa descendiendo, y que mantiene una tendencia que comenzó a principios de los años noventa. Preguntas y respuestas

334

711Ann. For. Sci. 61 (2004) 711719 INRA, EDP Sciences, 2004  

E-print Network

, Fraxinus excelsior and Acer pseudoplatanus were the main regenerating species, probably because référence). Dans les plantations d'épicéas, Fraxinus excelsior et Acer pseudoplatanus sont les principales

Paris-Sud XI, Université de

335

Communication SEGMENTATION ET STRATEGIES  

E-print Network

croisee des concepts de pyramide economique et d'acculturation AGNES BOUTIN ET CHARLOTTE GASTON-BRETON L'appuvant principalement sur I'existence d'un decoupage pyramidal selon les revenus et de phenomenes d'acculturation des

Paris-Sud XI, Université de

336

Substitution de solvants et matières actives de synthèse par un combiné «solvant/actif » d'origine végétale.  

E-print Network

??L'hydrodistillation est la principale méthode permettant d'obtenir des huiles essentielles à partir de plantes aromatiques. Traditionnellement, l'eau correspond au solvant employé lors du processus d'hydrodistillation.… (more)

Hernandez Ochoa, Leon Raul

2005-01-01

337

UNIVERSITE DE ROUEN UFR DES SCIENCES ET TECHNIQUES  

E-print Network

ECAP : Equal Channel Angular Pressing). b) Laminage accumulé (ou ARB : Accumulated Roll Bonding). c). 1. Les principales techniques de déformation plastique intense. a) Extrusion coudée à aire égale (ou

Paris-Sud XI, Université de

338

Atlas del Genoma del Cáncer: Antecedentes  

Cancer.gov

El Atlas del Genoma del Cáncer es una iniciativa de los Institutos Nacionales de la Salud (NIH) para crear mapas multidimensionales completos de los cambios genómicos clave en los tipos y subtipos principales de cáncer.

339

Répartition des moyens complémentaires de production et de stockage dans les réseaux faiblement interconnectés ou isolés.  

E-print Network

??Cette thèse se situe dans le cadre de l'étude des réseaux faiblement interconnectés (puissance échangée limitée)ou isolés, alimentés principalement par des sources d'origine renouvelable. Afin… (more)

Vu, Thang

2011-01-01

340

Teorema de Linearizacao para Fluxo Fuzzy  

Microsoft Academic Search

O objetivo deste trabalhoe estudar os sis- temas dinamicos fuzzy associados a sistemas de- termin´õsticos autonomos. O Princ´õpio de Ex- tensao de Zadehe utilizado para se obter o fluxo fuzzy de tais sistemas. ´ E apresentado um teorema de linearizacao fuzzy, como uma gen- eralizacao do Teorema de Grobman-Hartman, para a caracterizacao da estabilidade local dos equil´õbrios dos sistemas fuzzy

Marina T. Mizukoshi; Laecio C. Barros; Rodney C. Bassanezi

341

Analise, Exequibilidade e Logica Fernando Ferreira  

E-print Network

´atica do estudo da extrac¸c~ao de informa¸c~ao computacional de demonstra¸c~oes em sistemas axiom not´aveis da complexidade computacional. Finalmente, apresenta-se um sistema de segunda explorar a estrat´egia que consiste em extrair informa¸c~ao computacional de demonstra¸c~oes em sistemas

Edmundo, Mário Jorge

342

UNIVERSIDADE DA CORUA DEPARTAMENTO DE  

E-print Network

los miembros del laboratorio de Redes de Neuronas Artificiales y Sistemas Adaptativos (RNASA) de la ........................................................................ 15 2 FUNDAMENTOS .................................................................................................. 17 2.1 REDES DE NEURONAS ARTIFICIALES

Fernandez, Thomas

343

Comunidades de fungos micorrízicos arbusculares nos manejos convencional e orgânico de citros e suas interações com Phytophthora parasitica.  

E-print Network

??Agricultores e técnicos envolvidos na citricultura orgânica procuram desenvolver sistemas de produção com maior atividade microbiana no solo. Dessa maneira, esperam obter benefícios dos processos… (more)

Soraya de Carvalho França

2004-01-01

344

Obtaining joint stabilizers of controllers PID to systems with delay using the Hermite-Biehler theorem.  

E-print Network

??Os controladores PID são largamente utilizados em processos industriais. Recentemente, novos resultados de projeto de controladores PID foram obtidos para sistemas lineares invariantes no tempo… (more)

Alexandre Marcelo Fernandes da Silva

2008-01-01

345

Urbanization and the groundwater budget, metropolitan Seoul area, Korea  

NASA Astrophysics Data System (ADS)

The city of Seoul is home to more than 10 million people in an area of 605 km2. Groundwater is ed for public water supply and industrial use, and to drain underground facilities and construction sites. Though most tap water is supplied from the Han River, the quantity and quality of groundwater is of great concern to Seoul's citizens, because the use of groundwater for drinking water is continuously increasing. This study identifies the major factors affecting the urban water budget and quality of groundwater in the Seoul area and estimates the urban water budget. These factors include leakage from the municipal water-supply system and sewer systems, precipitation infiltration, water-level fluctuations of the Han River, the subway pumping system, and domestic pumping. The balance between groundwater recharge and discharge is near equilibrium. However, the quality of groundwater and ability to control contaminant fluxes are impeded by sewage infiltration, abandoned landfills, waste dumps, and abandoned wells. Résumé. La ville de Séoul possède une population de plus de 10 millions d'habitants, pour une superficie de 605 km2. Les eaux souterraines sont pompées pour l'eau potable et pour les usages industriels, ainsi que pour drainer les équipements souterrains et les sites en construction. Bien que l'essentiel de l'eau potable provienne de la rivière Han, la quantité et la qualité de l'eau souterraine présentent un grand intérêt pour les habitants de Séoul, parce qu'on utilise de plus en plus l'eau souterraine pour l'eau potable. Cette étude identifie les facteurs principaux qui affectent la qualité de l'eau souterraine dans la région de Séoul et fait l'estimation du bilan d'eau urbaine. Les principaux facteurs affectant le bilan d'eau urbaine et la qualité de l'eau souterraine sont les fuites du réseau d'adduction et du réseau d'égouts, l'infiltration des eaux de précipitation, les fluctuations du niveau de la rivière Han, le réseau de pompage du métro et les pompages privés. Le bilan entre la recharge de la nappe et sa décharge est proche de l'équilibre. Cependant, les infiltrations d'eaux usées, les décharges abandonnées, les décharges d'ordures et les puits abandonnés portent atteinte à la qualité de l'eau souterraine et à la capacité de contrôler les flux de contaminants. Resumen. La ciudad de Seúl tiene más de 10 millones de habitantes en un área de 605 km2. Se bombea aguas subterráneas para abastecimiento urbano y para usos industriales, así como para el drenaje de instalaciones subterráneas y de solares en construcción. Aunque la mayor parte del agua de boca procede del río Han, los ciudadanos de Seúl están muy concienciados por la cantidad y calidad de las aguas subterráneas, ya que su explotación para uso de boca está experimentando un continuo incremento. El presente estudio identifica los factores que más afectan a la calidad de las aguas subterráneas en el área de Seúl y hace una estimación del balance de agua en el territorio urbano. Entre los factores principales que afectan al balance y a la calidad de las aguas subterráneas, se incluye el lixiviado de la red municipal de suministro y de la red de alcantarillado, la infiltración de agua de lluvia, las fluctuaciones del nivel del río Han, el sistema de bombeo del metro y los bombeos domésticos. El balance entre la recarga y la descarga en el acuífero está próximo al equilibrio. Sin embargo, la calidad de las aguas subterráneas y la capacidad de controlar los flujos de contaminación están amenazadas por la infiltración de aguas residuales, vertederos abandonados, depósitos de residuos y pozos abanadonados.

Kim, Yoon-Young; Lee, Kang-Kun; Sung, Ig Hwan

2001-07-01

346

Practical application of bioinformatics by the multidisciplinary VIZIER consortium.  

PubMed

This review focuses on bioinformatics technologies employed by the EU-sponsored multidisciplinary VIZIER consortium (Comparative Structural Genomics of Viral Enzymes Involved in Replication, FP6 PROJECT: 2004-511960, active from 1 November 2004 to 30 April 2009), to achieve its goals. From the management of the information flow of the project, to bioinformatics-mediated selection of RNA viruses and prediction of protein targets, to the analysis of 3D protein structures and antiviral compounds, these technologies provided a communication framework and integrated solutions for steady and timely advancement of the project. RNA viruses form a large class of major pathogens that affect humans and domestic animals. Such RNA viruses as HIV, Influenza virus and Hepatitis C virus are of prime medical concern today, but the identities of viruses that will threaten human population tomorrow are far from certain. To contain outbreaks of common or newly emerging infections, prototype drugs against viruses representing the Virus Universe must be developed. This concept was championed by the VIZIER project which brought together experts in diverse fields to produce a concerted and sustained effort for identifying and validating targets for antivirus therapy in dozens of RNA virus lineages. PMID:20153379

Gorbalenya, Alexander E; Lieutaud, Philippe; Harris, Mark R; Coutard, Bruno; Canard, Bruno; Kleywegt, Gerard J; Kravchenko, Alexander A; Samborskiy, Dmitry V; Sidorov, Igor A; Leontovich, Andrey M; Jones, T Alwyn

2010-08-01

347

Silver nanoparticles in combination with acetic acid and zinc oxide quantum dots for antibacterial activities improvement-A comparative study  

NASA Astrophysics Data System (ADS)

Due to their remarkable antibacterial/antivirus properties, silver nanoparticles (Ag NPs) and zinc oxide quantum dots (ZnO Qds) have been widely used in the antimicrobial field. The mechanism of action of Ag NPs on bacteria was recently studied and it has been proven that Ag NPs exerts their antibacterial activities mainly by the released Ag+. In this work, Ag NPs and ZnO Qds were synthesized using polyol and hydrothermal method, respectively. It was demonstrated that Ag NPs can be oxidized easily in aqueous solution and the addition of acetic acid can increase the Ag+ release which improves the antibacterial activity of Ag NPs. A comparative study between bactericidal effect of Ag NPs/acetic acid and Ag NPs/ZnO Qds on Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumonia and Staphylococcus aureus was undertaken using agar diffusion method. The obtained colloids were characterized using UV-vis spectroscopy, Raman spectrometry, X-ray diffraction (XRD), transmission electron microscopy (TEM) and atomic force microscopy (AFM).

Sedira, Sofiane; Ayachi, Ahmed Abdelhakim; Lakehal, Sihem; Fateh, Merouane; Achour, Slimane

2014-08-01

348

A Novel Method for Simultaneous Production of Two Ribosome-Inactivating Proteins, ?-MMC and MAP30, from Momordica charantia L  

PubMed Central

Alpha-momorcharin (?-MMC) and momordica anti-HIV protein (MAP30) from Momordica charantia L. have been confirmed to possess anti-tumor and anti-virus activities. Traditional purification methods of these two ribosome-inactivating proteins (RIPs) were separate which was time consuming and cost effective as well as low efficient. In order to obtain sufficient samples for researches, a strategy combining ion-exchange and gel filtration chromatography was developed and optimized in this study. Using this novel purification method, averagely 1162 mg of ?-MMC and 535 mg of MAP30 were obtained from 400 g of Momordica charantia L seeds. The homogeneities of them were assessed by electrophoresis analysis. Determination of molecular weights of ?-MMC and MAP30 were 28.585 kDa and 29.094 kDa by MALDI-TOF/TOF and pI were 9.02 and 9.12, respectively. The single glycoproteins were identified by Periodate-Schiff's base (PAS) and the saccharide content was tested to be 1.25% and 1.1% by anthrone-sulfuric acid method. Biological activities were evidenced by their ability to inhibit proliferation of lung adenocarcinoma A549 cell and to convert supercoiled plasmid pUC18 into relaxed forms. Finally, we also found that both two RIPs exhibited no superoxide dismutase (SOD) activity. PMID:25003606

Liu, Shuangfeng; Fan, Xiang; Li, Gangrui; Meng, Yanfa

2014-01-01

349

Development of antimicrobial biomaterials produced from chitin-nanofiber sheet/silver nanoparticle composites.  

PubMed

BackgroundChitin nanofibers sheets (CNFSs) with nanoscale fiber-like surface structures are nontoxic and biodegradable biomaterials with large surface-to-mass ratio. CNFSs are widely applied as biomedical materials such as a functional wound dressing. This study aimed to develop antimicrobial biomaterials made up of CNFS-immobilized silver nanoparticles (CNFS/Ag NPs).Materials and methodsCNFSs were immersed in suspensions of Ag NPs (5.17¿±¿1.9 nm in diameter; mean¿±¿SD) for 30 min at room temperature to produce CNFS/Ag NPs. CNFS/Ag NPs were characterized by transmission electron microscopy (TEM) and then tested for antimicrobial activities against Escherichia (E.) coli, Pseudomonas (P.) aeruginosa, and H1N1 influenza A virus, three pathogens that represent the most widespread infectious bacteria and viruses. Ultrathin sectioning of bacterial cells also was carried out to observe the bactericidal mechanism of Ag NPs.ResultsThe TEM images indicated that the Ag NPs are dispersed and tightly adsorbed onto CNFSs. Although CNFSs alone have only weak antimicrobial activity, CNFS/Ag NPs showed much stronger antimicrobial properties against E. coli, P. aeruginosa, and influenza A virus, with the amount of immobilized Ag NPs onto CNFSs.ConclusionsOur results suggest that CNFS/Ag NPs interacting with those microbes exhibit stronger antimicrobial activities, and that it is possible to apply CNFS/Ag NPs as anti-virus sheets as well as anti-infectious wound dressings. PMID:25467525

Nguyen, Vinh; Ishihara, Masayuki; Kinoda, Jun; Hattori, Hidemi; Nakamura, Shingo; Ono, Takeshi; Miyahira, Yasushi; Matsui, Takemi

2014-12-01

350

Proteochemometric Modeling of the Bioactivity Spectra of HIV-1 Protease Inhibitors by Introducing Protein-Ligand Interaction Fingerprint  

PubMed Central

HIV-1 protease is one of the main therapeutic targets in HIV. However, a major problem in treatment of HIV is the rapid emergence of drug-resistant strains. It should be particularly helpful to clinical therapy of AIDS if one method can be used to predict antivirus capability of compounds for different variants. In our study, proteochemometric (PCM) models were created to study the bioactivity spectra of 92 chemical compounds with 47 unique HIV-1 protease variants. In contrast to other PCM models, which used Multiplication of Ligands and Proteins Descriptors (MLPD) as cross-term, one new cross-term, i.e. Protein-Ligand Interaction Fingerprint (PLIF) was introduced in our modeling. With different combinations of ligand descriptors, protein descriptors and cross-terms, nine PCM models were obtained, and six of them achieved good predictive abilities (Q2test>0.7). These results showed that the performance of PCM models could be improved when ligand and protein descriptors were complemented by the newly introduced cross-term PLIF. Compared with the conventional cross-term MLPD, the newly introduced PLIF had a better predictive ability. Furthermore, our best model (GD & P & PLIF: Q2test?=?0.8271) could select out those inhibitors which have a broad antiviral activity. As a conclusion, our study indicates that proteochemometric modeling with PLIF as cross-term is a potential useful way to solve the HIV-1 drug-resistant problem. PMID:22848570

Liu, Qi; Wu, Qiong; Kang, Hong; Cao, Zhiwei; Zhu, Ruixin

2012-01-01

351

Phishing for suitable targets in the Netherlands: routine activity theory and phishing victimization.  

PubMed

This article investigates phishing victims, especially the increased or decreased risk of victimization, using data from a cybercrime victim survey in the Netherlands (n=10,316). Routine activity theory provides the theoretical perspective. According to routine activity theory, several factors influence the risk of victimization. A multivariate analysis was conducted to assess which factors actually lead to increased risk of victimization. The model included background and financial data of victims, their Internet activities, and the degree to which they were "digitally accessible" to an offender. The analysis showed that personal background and financial characteristics play no role in phishing victimization. Among eight Internet activities, only "targeted browsing" led to increased risk. As for accessibility, using popular operating systems and web browsers does not lead to greater risk, while having up-to-date antivirus software as a technically capable guardian has no effect. The analysis showed no one, clearly defined group has an increased chance of becoming a victim. Target hardening may help, but opportunities for prevention campaigns aimed at a specific target group or dangerous online activities are limited. Therefore, situational crime prevention will have to come from a different angle. Banks could play the role of capable guardian. PMID:25080013

Leukfeldt, E Rutger

2014-08-01

352

A Novel Cyber-Insurance for Internet Security  

E-print Network

Internet users such as individuals and organizations are subject to different types of epidemic risks such as worms, viruses, and botnets. To reduce the probability of risk, an Internet user generally invests in self-defense mechanisms like antivirus and antispam software. However, such software does not completely eliminate risk. Recent works have considered the problem of residual risk elimination by proposing the idea of cyber-insurance. In reality, an Internet user faces risks due to security attacks as well as risks due to non-security related failures (e.g., reliability faults in the form of hardware crash, buffer overflow, etc.) . These risk types are often indistinguishable by a naive user. However, a cyber-insurance agency would most likely insure risks only due to security attacks. In this case, it becomes a challenge for an Internet user to choose the right type of cyber-insurance contract as standard optimal contracts, i.e., contracts under security attacks only, might prove to be sub-optimal for ...

Pal, Ranjan; Psounis, Konstantinos

2011-01-01

353

In vitro immunocompetence of two compounds isolated from Polygala tenuifolia and development of resistance against grass carp reovirus (GCRV) and Dactylogyrus intermedius in respective host.  

PubMed

The present study was undertaken to isolate some compounds from methanol extract of Polygala tenuifolia and evaluate their immunostimulatory properties and antiviral activity using grass carp Ctenopharyngodon idella kidney (CIK) cells and GCRV. By applying insecticidal bioassay-guided, chromatography techniques and successive recrystallization, two purified compounds were obtained. The changes of expression of selected immune genes (Mx1, IL-1?, TNF?, MyD88 and IgM) in C. idella kidney cell lines were evaluated after exposure to these isolated compounds. The results showed that compound 1 and 2 up-regulated to varying degrees of Mx1, IL-1?, TNF?, and MyD88 in C. idella kidney cells. WST-8 kit assay verified the two compounds has no toxic effects on CIK cell, and furthermore, have in vitro antivirus activity. Especially, that there is keeping 79% cell viability when exposure to compound 2 (100 mg L(-1)). According to in vivo insecticidal assays against Dactylogyrus intermedius, compound 2 exhibited higher efficacy than compound 1, which was found to be 87.2% effective at the concentrations of 5 mg L(-1) and safe to goldfish (Carassius auratus). Besides, the purified compounds were identified by spectral data as: (1) 1,5-Anhydro-D-glucitol and (2) 3,4,5-trimethoxy cinnamic acid. Overall, the results indicate that bath administration of these compounds modulates the immune related genes in C. idella kidney cells and to some extent, eliminate the virus and parasitic infections. PMID:25450998

Yu, Xiao-Bo; Liu, Guang-Lu; Zhu, Bin; Hao, Kai; Ling, Fei; Wang, Gao-Xue

2014-12-01

354

T cell-mediated immune response to respiratory coronaviruses.  

PubMed

Emerging respiratory coronaviruses such as the severe acute respiratory syndrome coronavirus (SARS-CoV) and Middle East respiratory syndrome coronavirus (MERS-CoV) pose potential biological threats to humans. SARS and MERS are manifested as severe atypical pneumonia associated with high morbidity and mortality in humans. The majority of studies carried out in SARS-CoV-infected humans and animals attribute a dysregulated/exuberant innate response as a leading contributor to SARS-CoV-mediated pathology. A decade after the 2002-2003 SARS epidemic, we do not have any approved preventive or therapeutic agents available in case of re-emergence of SARS-CoV or other related viruses. A strong neutralizing antibody response generated against the spike (S) glycoprotein of SARS-CoV is completely protective in the susceptible host. However, neutralizing antibody titers and the memory B cell response are short lived in SARS-recovered patients and the antibody will target primary homologous strain. Interestingly, the acute phase of SARS in humans is associated with a severe reduction in the number of T cells in the blood. Surprisingly, only a limited number of studies have explored the role of the T cell-mediated adaptive immune response in respiratory coronavirus pathogenesis. In this review, we discuss the role of anti-virus CD4 and CD8 T cells during respiratory coronavirus infections with a special emphasis on emerging coronaviruses. PMID:24845462

Channappanavar, Rudragouda; Zhao, Jincun; Perlman, Stanley

2014-08-01

355

A novel method for simultaneous production of two ribosome-inactivating proteins, ?-MMC and MAP30, from Momordica charantia L.  

PubMed

Alpha-momorcharin (?-MMC) and momordica anti-HIV protein (MAP30) from Momordica charantia L. have been confirmed to possess anti-tumor and anti-virus activities. Traditional purification methods of these two ribosome-inactivating proteins (RIPs) were separate which was time consuming and cost effective as well as low efficient. In order to obtain sufficient samples for researches, a strategy combining ion-exchange and gel filtration chromatography was developed and optimized in this study. Using this novel purification method, averagely 1162 mg of ?-MMC and 535 mg of MAP30 were obtained from 400 g of Momordica charantia L seeds. The homogeneities of them were assessed by electrophoresis analysis. Determination of molecular weights of ?-MMC and MAP30 were 28.585 kDa and 29.094 kDa by MALDI-TOF/TOF and pI were 9.02 and 9.12, respectively. The single glycoproteins were identified by Periodate-Schiff's base (PAS) and the saccharide content was tested to be 1.25% and 1.1% by anthrone-sulfuric acid method. Biological activities were evidenced by their ability to inhibit proliferation of lung adenocarcinoma A549 cell and to convert supercoiled plasmid pUC18 into relaxed forms. Finally, we also found that both two RIPs exhibited no superoxide dismutase (SOD) activity. PMID:25003606

Meng, Yao; Lin, Sen; Liu, Shuangfeng; Fan, Xiang; Li, Gangrui; Meng, Yanfa

2014-01-01

356

The effects of administration of ligands for Toll-like receptor 4 and 21 against Marek's disease in chickens.  

PubMed

Ligands for Toll-like receptors (TLRs) are known to stimulate immune responses, leading to protection against bacterial and viral pathogens. Here, we aimed to examine the effects of various TLR ligands on the development of Marek's disease in chickens. Specific-pathogen free chickens were treated with a series of TLR ligands that interact with TLR3, TLR9 and TLR21. In a pilot study, it was determined that TLR4 and TLR21 ligands are efficacious, in that they could reduce the incidence of Marek's disease tumors in infected birds. Hence, in a subsequent study, chickens were treated with lipopolysaccharide (LPS) as a TLR4 and CpG oligodeoxynucleotides (ODN) as TLR21 agonists before being challenged with the RB1B strain of Marek's disease virus (MDV) via the respiratory route. The results demonstrated that the administration of LPS or CpG ODN, but not PBS or non-CpG ODN, delayed disease onset and reduced MDV genome copy number in the spleens of infected chickens. Taken together, our data demonstrate that TLR4 and 21 agonists modulate anti-virus innate immunity including cytokine responses in MD-infected chicken and this response can only delay, but not inhibit, disease progression. PMID:24530927

Parvizi, Payvand; Abdul-Careem, Mohamed Faizal; Mallick, Amirul Islam; Haq, Kamran; Haghighi, Hamid R; Orouji, Shahriar; Heidari, Mohammad; Behboudi, Shahriar; Sharif, Shayan

2014-04-01

357

A Drosophila ABC transporter regulates lifespan.  

PubMed

MRP4 (multidrug resistance-associated protein 4) is a member of the MRP/ABCC subfamily of ATP-binding cassette (ABC) transporters that are essential for many cellular processes requiring the transport of substrates across cell membranes. Although MRP4 has been implicated as a detoxification protein by transport of structurally diverse endogenous and xenobiotic compounds, including antivirus and anticancer drugs, that usually induce oxidative stress in cells, its in vivo biological function remains unknown. In this study, we investigate the biological functions of a Drosophila homolog of human MRP4, dMRP4. We show that dMRP4 expression is elevated in response to oxidative stress (paraquat, hydrogen peroxide and hyperoxia) in Drosophila. Flies lacking dMRP4 have a shortened lifespan under both oxidative and normal conditions. Overexpression of dMRP4, on the other hand, is sufficient to increase oxidative stress resistance and extend lifespan. By genetic manipulations, we demonstrate that dMRP4 is required for JNK (c-Jun NH2-terminal kinase) activation during paraquat challenge and for basal transcription of some JNK target genes under normal condition. We show that impaired JNK signaling is an important cause for major defects associated with dMRP4 mutations, suggesting that dMRP4 regulates lifespan by modulating the expression of a set of genes related to both oxidative resistance and aging, at least in part, through JNK signaling. PMID:25474322

Huang, He; Lu-Bo, Ying; Haddad, Gabriel G

2014-12-01

358

Attenuation of vesicular stomatitis virus infection of brain using antiviral drugs and an adeno-associated virus-interferon vector.  

PubMed

Vesicular stomatitis virus (VSV) shows promise as a vaccine-vector and oncolytic virus. However, reports of neurotoxicity of VSV remain a concern. We compared 12 antiviral compounds to control infection of VSV-CT9-M51 and VSV-rp30 using murine and human brain cultures, and in vivo mouse models. Inhibition of replication, cytotoxicity and infectivity was strongest with ribavirin and IFN-? and to some extent with mycophenolic acid, chloroquine, and adenine 9-?-d-arabinofuranoside. To generate continuous IFN exposure, we made an adeno-associated virus vector expressing murine IFN; AAV-mIFN-? protected mouse brain cells from VSV, as did a combination of IFN, ribavirin and chloroquine. Intracranial AAV-mIFN-? protected the brain against VSV-CT9-M51. In SCID mice bearing human glioblastoma, AAV-mIFN-? moderately enhanced survival. VSV-CT9-M51 doubled median survival when administered after AAV-mIFN-?; some surviving mice showed complete tumor destruction. Together, these data suggest that AAV-IFN or IFN with ribavirin and chloroquine provide an optimal anti-virus combination against VSV in the brain. PMID:25462341

Wollmann, Guido; Paglino, Justin C; Maloney, Patrick R; Ahmadi, Sebastian A; van den Pol, Anthony N

2015-01-15

359

Hepatitis C virus represses the cellular antiviral response by upregulating the expression of signal transducer and activator of transcription 3 through sponging microRNA-122  

PubMed Central

microRNAs (miRNAs) are small, non-coding RNAs that inhibit the expression of target protein coding genes at the post-transcriptional level. miR-122 is a liver specific miRNA. Notably, miR-122 is used by the hepatitis C virus (HCV) for triggering viral replication by interacting with the 5? untranslated region of the HCV RNA. The present study demonstrated that miR-122 inhibited the expression of signal transducer and activator of transcription 3 (STAT3), an antivirus response repressor. The HCV RNA acted as an ‘miRNA sponge’, which upregulated the expression of STAT3 by sealing miR-122. Subsequently, it was confirmed that this miR-122 sponge function of HCV RNA repressed the expression of polyinosinic-polycytidylic acid-stimulated type I interferons. The present study provided a deeper understanding of the complex role of miR-122 in the progression of HCV infection and supported the miR-122 inhibition strategy in anti-HCV infection treatment. PMID:25377467

XIONG, YULIN; ZHANG, CHANGJIANG; YUAN, JING; ZHU, YAN; TAN, ZHAOXIA; KUANG, XUEMEI; WANG, XIAOHONG

2015-01-01

360

Antiviral activity of Rheum palmatum methanol extract and chrysophanol against Japanese encephalitis virus.  

PubMed

Rheum palmatum, Chinese traditional herb, exhibits a great variety of anti-cancer and anti-viruses properties. This study rates antiviral activity of R. palmatum extracts and its components against Japanese encephalitis virus (JEV) in vitro. Methanol extract of R. palmatum contained higher levels of aloe emodin, chrysophanol, rhein, emodin and physcion than water extract. Methanol extract (IC50 = 15.04 ?g/ml) exhibited more potent inhibitory effects on JEV plaque reduction than water extract (IC50 = 51.41 ?g/ml). Meanwhile, IC50 values determined by plaque reduction assay were 15.82 ?g/ml for chrysophanol and 17.39 ?g/ml for aloe-emodin, respectively. Virucidal activity of agents correlated with anti-JEV activity, while virucidal IC50 values were 7.58 ?g/ml for methanol extract, 17.36 ?g/ml for water extract, 0.75 ?g/ml for chrysophanol and 0.46 ?g/ml for aloe-emodin, respectively. In addition, 10 ?g/ml of extract, chrysophanol or aloe emodin caused 90 % inhibition of JEV yields in cells and significantly activated gamma activated sequence-driven promoters. Hence, methanol extract of R. palmatum and chrysophanol with high therapeutic index might be useful for development of antiviral agents against JEV. PMID:24395532

Chang, Shu-Jen; Huang, Su-Hua; Lin, Ying-Ju; Tsou, Yi-Yun; Lin, Cheng-Wen

2014-09-01

361

Antiviral activity of Rheum palmatum methanol extract and chrysophanol against Japanese encephalitis virus.  

PubMed

Rheum palmatum, Chinese traditional herb, exhibits a great variety of anti-cancer and anti-viruses properties. This study rates antiviral activity of R. palmatum extracts and its components against Japanese encephalitis virus (JEV) in vitro. Methanol extract of R. palmatum contained higher levels of aloe emodin, chrysophanol, rhein, emodin and physcion than water extract. Methanol extract (IC50 = 15.04 lg/ml) exhibited more potent inhibitory effects on JEV plaque reduction than water extract (IC50 = 51.41 lg/ml). Meanwhile, IC50 values determined by plaque reduction assay were 15.82 lg/ml for chrysophanol and 17.39 lg/ml for aloe-emodin, respectively. Virucidal activity of agents correlated with anti-JEV activity, while virucidal IC50 values were 7.58 lg/ml for methanol extract, 17.36 lg/ml for water extract, 0.75 lg/ml for chrysophanol and 0.46 lg/ml for aloe-emodin, respectively. In addition, 10 lg/ml of extract, chrysophanol or aloe emodin caused 90 % inhibition of JEV yields in cells and significantly activated gamma activated sequence-driven promoters. Hence, methanol extract of R. palmatum and chrysophanol with high therapeutic index might be useful for development of antiviral agents against JEV. PMID:25295355

Chang, Shu-Jen; Huang, Su-Hua; Lin, Ying-Ju; Tsou, Yi-Yun; Lin, Cheng-Wen

2014-09-01

362

Ascophyllan Purified from Ascophyllum nodosum Induces Th1 and Tc1 Immune Responses by Promoting Dendritic Cell Maturation  

PubMed Central

Marine-derived sulfated polysaccharides have been shown to possess certain anti-virus, anti-tumor, anti-inflammatory and anti-coagulant activities. However, the in vivo immunomodulatory effects of marine-derived pure compounds have been less well characterized. In this study, we investigated the effect of ascophyllan, a sulfated polysaccharide purified from Ascophyllum nodosum, on the maturation of mouse dendritic cells (DCs) in vitro and in vivo. Ascophyllan induced up-regulation of co-stimulatory molecules and production of pro-inflammatory cytokines in bone marrow-derived DCs (BMDCs). Moreover, in vivo administration of ascophyllan promotes up-regulation of CD40, CD80, CD86, MHC class I and MHC class II and production of IL-6, IL-12 and TNF-? in spleen cDCs. Interestingly, ascophyllan induced a higher degree of co-stimulatory molecule up-regulation and pro-inflammatory cytokine production than fucoidan, a marine-derived polysaccharide with well-defined effect for promoting DC maturation. Ascophyllan also promoted the generation of IFN-?-producing Th1 and Tc1 cells in the presence of DCs in an IL-12-dependent manner. Finally, myeloid differentiation primary response 88 (MyD88) signaling pathway was essential for DC maturation induced by ascophyllan. Taken together, these results demonstrate that ascophyllan induces DC maturation, and consequently enhances Th1 and Tc1 responses in vivo. This knowledge could facilitate the development of novel therapeutic strategies to combat infectious diseases and cancer. PMID:25026264

Zhang, Wei; Du, Jiang-Yuan; Jiang, Zedong; Okimura, Takasi; Oda, Tatsuya; Yu, Qing; Jin, Jun-O

2014-01-01

363

Ascophyllan purified from Ascophyllum nodosum induces Th1 and Tc1 immune responses by promoting dendritic cell maturation.  

PubMed

Marine-derived sulfated polysaccharides have been shown to possess certain anti-virus, anti-tumor, anti-inflammatory and anti-coagulant activities. However, the in vivo immunomodulatory effects of marine-derived pure compounds have been less well characterized. In this study, we investigated the effect of ascophyllan, a sulfated polysaccharide purified from Ascophyllum nodosum, on the maturation of mouse dendritic cells (DCs) in vitro and in vivo. Ascophyllan induced up-regulation of co-stimulatory molecules and production of pro-inflammatory cytokines in bone marrow-derived DCs (BMDCs). Moreover, in vivo administration of ascophyllan promotes up-regulation of CD40, CD80, CD86, MHC class I and MHC class II and production of IL-6, IL-12 and TNF-? in spleen cDCs. Interestingly, ascophyllan induced a higher degree of co-stimulatory molecule up-regulation and pro-inflammatory cytokine production than fucoidan, a marine-derived polysaccharide with well-defined effect for promoting DC maturation. Ascophyllan also promoted the generation of IFN-?-producing Th1 and Tc1 cells in the presence of DCs in an IL-12-dependent manner. Finally, myeloid differentiation primary response 88 (MyD88) signaling pathway was essential for DC maturation induced by ascophyllan. Taken together, these results demonstrate that ascophyllan induces DC maturation, and consequently enhances Th1 and Tc1 responses in vivo. This knowledge could facilitate the development of novel therapeutic strategies to combat infectious diseases and cancer. PMID:25026264

Zhang, Wei; Du, Jiang-Yuan; Jiang, Zedong; Okimura, Takasi; Oda, Tatsuya; Yu, Qing; Jin, Jun-O

2014-07-01

364

Rig-I regulates NF-?B activity through binding to Nf-?b1 3?-UTR mRNA  

PubMed Central

Retinoic acid inducible gene I (RIG-I) senses viral RNAs and triggers innate antiviral responses through induction of type I IFNs and inflammatory cytokines. However, whether RIG-I interacts with host cellular RNA remains undetermined. Here we report that Rig-I interacts with multiple cellular mRNAs, especially Nf-?b1. Rig-I is required for NF-?B activity via regulating Nf-?b1 expression at posttranscriptional levels. It interacts with the multiple binding sites within 3?-UTR of Nf-?b1 mRNA. Further analyses reveal that three distinct tandem motifs enriched in the 3?-UTR fragments can be recognized by Rig-I. The 3?-UTR binding with Rig-I plays a critical role in normal translation of Nf-?b1 by recruiting the ribosomal proteins [ribosomal protein L13 (Rpl13) and Rpl8] and rRNAs (18S and 28S). Down-regulation of Rig-I or Rpl13 significantly reduces Nf-?b1 and 3?-UTR–mediated luciferase expression levels. These findings indicate that Rig-I functions as a positive regulator for NF-?B signaling and is involved in multiple biological processes in addition to host antivirus immunity. PMID:23553835

Zhang, Hong-Xin; Liu, Zi-Xing; Sun, Yue-Ping; Lu, Shun-Yuan; Liu, Xue-Song; Huang, Qiu-Hua; Xie, Yin-Yin; Dang, Su-Ying; Zheng, Guang-Yong; Li, Yi-Xue; Kuang, Ying; Fei, Jian; Chen, Zhu; Wang, Zhu-Gang

2013-01-01

365

From Intrusion Detection to Self Protection  

SciTech Connect

Modern computer systems have become so complex and interdependent that the traditional model of system defense, utilizing layers and including an intrusion detection system that provides alerts to a human who responds to them, is becoming unfeasible. Effective human-guided real-time responses are no longer a reasonable expectation for large scale systems--this is particularly troublesome because a failure to respond correctly and rapidly can have disastrous consequences. In an ideal world, our systems would automatically detect and respond to threats of all kinds, including but not limited to automated attacks, human-guided attacks, and the constant onslaught of unsolicited email (spam). Traditionally, these threats have been dealt with by separate communities--the anti-virus community, the intrusion-detection/firewall community, and the anti-spam community. Today however, we see an increasing need for integrating different technologies toward achieving a common goal. In this special issue, we surveyed the research community with the intent of identifying novel, multidisciplinary and integrated approaches to system defense that contribute towards development of true self-protecting and self-healing systems. The result is reflected in the articles we selected.

Frincke, Deb; Wespi, Andreas; Zamboni, Diego

2007-04-11

366

Modeling Internet Security Investments: The Case of Dealing with Information Uncertainty  

E-print Network

Modern distributed communication networks like the Internet and censorship-resistant networks (also a part of the Internet) are characterized by nodes (users) interconnected with one another via communication links. In this regard, the security of individual nodes depend not only on their own efforts, but also on the efforts and underlying connectivity structure of neighboring network nodes. By the term 'effort', we imply the amount of investments made by a user in security mechanisms like antivirus softwares, firewalls, etc., to improve its security. However, often due to the large magnitude of such networks, it is not always possible for nodes to have complete effort and connectivity structure information about all their neighbor nodes. Added to this is the fact that in many applications, the Internet users are selfish and are not willing to co-operate with other users on sharing effort information. In this paper, we adopt a non-cooperative game-theoretic approach to analyze individual user security in a co...

Pal, Ranjan

2011-01-01

367

The messenger's great message for vaccination.  

PubMed

Poly ribonucleic acid (RNA) is the only polymer capable to recapitulate all processes of life: containment of genetic information, enzymatic activities and capacity to create defined 3D structures. Since it has a remarkable chemical stability (at neutral or acidic pH) and can be modified to enhance/reduce particular features (e.g., stability in biological RNase containing milieus or recognition by immune sensors), it is a particularly versatile and ideal active pharmaceutical ingredient. However, the utilization of RNA as a gene vehicle (messenger RNA, mRNA) for therapy has only recently been exploited. Within this scope, mRNA-based vaccines designed to trigger anti-cancer, anti-virus or anti-allergy immune responses have been developed. Modifications of mRNA vectors and implementation of adequate formulations have allowed to turn this natural superlative biological molecule into a safe active pharmaceutical ingredient that can virtually address any medical need including vaccination or immunotherapy. This is the newest great message delivered by this messenger. PMID:25586101

Pascolo, Steve

2015-02-01

368

DROP: Detecting Return-Oriented Programming Malicious Code  

NASA Astrophysics Data System (ADS)

Return-Oriented Programming (ROP) is a new technique that helps the attacker construct malicious code mounted on x86/SPARC executables without any function call at all. Such technique makes the ROP malicious code contain no instruction, which is different from existing attacks. Moreover, it hides the malicious code in benign code. Thus, it circumvents the approaches that prevent control flow diversion outside legitimate regions (such as W ? X ) and most malicious code scanning techniques (such as anti-virus scanners). However, ROP has its own intrinsic feature which is different from normal program design: (1) uses short instruction sequence ending in "ret", which is called gadget, and (2) executes the gadgets contiguously in specific memory space, such as standard GNU libc. Based on the features of the ROP malicious code, in this paper, we present a tool DROP, which is focused on dynamically detecting ROP malicious code. Preliminary experimental results show that DROP can efficiently detect ROP malicious code, and have no false positives and negatives.

Chen, Ping; Xiao, Hai; Shen, Xiaobin; Yin, Xinchun; Mao, Bing; Xie, Li

369

WSSV-induced crayfish Dscam shows durable immune behavior.  

PubMed

One of the major gaps in our understanding of arthropod specific immune priming concerns the mechanism[s] by which the observed long-term (>2 weeks) protective effects might be mediated. Hypervariable Dscam (Down syndrome cell adhesion molecule) might support arthropod innate immunity with specificity for more extended periods. We show here that, in the relatively long-lived arthropod Cherax quadricarinatus, CqDscam does not behave like a typical, immediately-acting, short-lived innate immune factor: CqDscam was not induced within hours after challenge with a lethal virus, but instead was only up-regulated after 2-5 days. This initial response faded within ? 2 weeks, but another maximum was reached ? 1 month later. At around 2 months after the initial challenge, the virus-induced CqDscam bound to the virus virion and acted to neutralize the virus However, although CqDscam helped crayfish to survive during persistent infection, it nevertheless failed to provide any enhanced protection against a subsequent WSSV challenge. Thus, CqDscam is capable of supporting extended anti-virus immune memory in arthropods. Also, during a persistent virus infection, the balance of "immune firepower" in crayfish appears to be altered such that the general immune factors become depleted while CqDscam becomes relatively predominant. PMID:24973514

Ng, Tze Hann; Hung, Hsin-Yi; Chiang, Yi-An; Lin, Jia-Hung; Chen, Yi-Ning; Chuang, Ya-Chu; Wang, Han-Ching

2014-09-01

370

Hepatitis C virus represses the cellular antiviral response by upregulating the expression of signal transducer and activator of transcription 3 through sponging microRNA?122.  

PubMed

MicroRNAs (miRNAs) are small, non?coding RNAs that inhibit the expression of target protein coding genes at the post?transcriptional level. miR?122 is a liver specific miRNA. Notably, miR?122 is used by the hepatitis C virus (HCV) for triggering viral replication by interacting with the 5' untranslated region of the HCV RNA. The present study demonstrated that miR?122 inhibited the expression of signal transducer and activator of transcription 3 (STAT3), an antivirus response repressor. The HCV RNA acted as an 'miRNA sponge', which upregulated the expression of STAT3 by sealing miR?122. Subsequently, it was confirmed that this miR?122 sponge function of HCV RNA repressed the expression of polyinosinic?polycytidylic acid?stimulated type I interferons. The present study provided a deeper understanding of the complex role of miR?122 in the progression of HCV infection and supported the miR?122 inhibition strategy in anti?HCV infection treatment. PMID:25377467

Xiong, Yulin; Zhang, Changjiang; Yuan, Jing; Zhu, Yan; Tan, Zhaoxia; Kuang, Xuemei; Wang, Xiaohong

2015-03-01

371

Lactobacillus acidophilus L-92 Cells Activate Expression of Immunomodulatory Genes in THP-1 Cells  

PubMed Central

To understand the immunomodulatory effects of Lactobacillus acidophilus L-92 cells suggested from our previous study of in vivo anti-allergy and anti-virus effects, host immune responses in macrophage-like THP-1 cells after 4?h (the early phase) and 24?h (the late phase) of cocultivation with L-92 cells were investigated by transcriptome analysis. In the early phase of L-92 treatment, various transcription regulator genes, such as, NFkB1, NFkB2, JUN, HIVEP2 and RELB, and genes encoding chemokines and cytokines, such as CCL4, CXCL11, CCL3 and TNF, were upregulated. Two transmembrane receptor genes, TLR7 and ICAM1, were also upregulated in the early phase of treatment. In contrast, many transmembrane receptor genes, such as IL7R, CD80, CRLF2, CD86, CD5, HLA-DQA1, IL2RA, IL15RA and CSF2RA, and some cytokine genes, including IL6, IL23A and CCL22, were significantly upregulated in the late phase after L-92 exposure. Some genes encoding cytokines, such as IL1A, IL1B and IL8, and the enzyme IDO1 were upregulated at both the early and the late phases of treatment. These results suggest that probiotic L-92 might promote Th1 and regulatory T-cell responses by activation of the MAPK signaling pathway, followed by the NOD-like receptor signaling pathway in THP-1 cells. PMID:25379363

YANAGIHARA, Sae; GOTO, Hiroaki; HIROTA, Tatsuhiko; FUKUDA, Shinji; OHNO, Hiroshi; YAMAMOTO, Naoyuki

2014-01-01

372

Quality control of tuirejieduling granules using high-performance liquid chromatography fingerprint method and simultaneous determination of four main active ingredients  

PubMed Central

Background: The Tuirejieduling granule is a compound preparation made from four kinds of Chinese medicines. It is effective for anti-inflammation, antivirus, defervescence and anti-bacterium; however, its quality control standards have remained unknown. Objective: To establish a simple and accurate fingerprint method for quality control of the Tuirejieduling granule. Materials and Methods: The methanol extract of the Tuirejieduling granule was used for the fingerprint analysis and the four selected active ingredients (epigoitrin, phillyrin, saikosaponin A and glycyrrhetinic acid) in the extract were determined. The fingerprint method was performed on an Amethyst C18-P chromatography column by gradient elution with acetonitrile and aqueous phase (containing 0.5% H3PO4 (v/v), pH 3.0). Results: Under the optimal chromatographic condition, twenty peaks were chosen as fingerprint peaks of the Tuirejieduling granules extractions. The similarities of 10 batches of Tuirejieduling granule was more than 0.99. This indicates that the different batches of Tuirejieduling granules were under the consistent quality control. Good linear behaviors over the investigated concentration ranges were obtained with the values of R2 higher than 0.99 for four studied active ingredients. The recoveries for spiked samples were in the range of 96.2–105.5%. The developed method was successfully applied to determine the contents of active constituents in different batches of Tuirejieduling granule. Conclusion: The HPLC fingerprint was proved to be a reliable method for the quality control of Tuirejieduling granule. PMID:23772113

Yang, Aixia; Wang, Xiaoxian; Xiong, Chaomei; Chen, Jing; Ruan, Jinlan

2013-01-01

373

Hydrolysis is the dominating in vivo metabolism pathway for arctigenin: identification of novel metabolites of arctigenin by LC/MS/MS after oral administration in rats.  

PubMed

The phenylpropanoid dibenzylbutyrolactone lignan arctigenin, a key component found in Arctium lappa, or burdock, has been reported with a variety of therapeutic effects including anticancer, anti-inflammation, and antivirus effects. Using LC/MS/MS, three novel metabolites of arctigenin, namely, arctigenic acid, arctigenin-4-O'-glucuronide, and 4-O-demethylarctigenin were identified after oral administration of arctigenin in rats for the first time. Another potential metabolite of arctigenin, arctigenin-4'-O-sulfate, was identified in vitro but not in vivo. Structure of arctigenic acid, the major metabolite of arctigenin, was confirmed by 13C-NMR and 1H-NMR. Rapid hydrolysis in plasma was identified as the major metabolic pathway of arctigenin after its oral administration, with Vmax, Km, and Clint in rat plasma determined to be 2.21 ± 0.12 nmol/min/mg, 89.12 ± 9.44 µM, and 24.74 µL/min/mg, respectively. Paraoxonase 1 was further confirmed to be the enzyme responsible for arctigenin hydrolysis, with Vmax, Km, and Clint determined to be 55.39 ± 1.49 nmol/min/mg, 300.3 ± 10.86 µM, and 184.45 µL/min/mg, respectively. PMID:23519790

Gao, Qiong; Zhang, Yufeng; Wo, Siukwan; Zuo, Zhong

2013-04-01

374

Molecular cloning, recombinant expression, and antimicrobial activity of EC-hepcidin3, a new four-cysteine hepcidin isoform from Epinephelus coioides.  

PubMed

Hepcidin, a cysteine-rich antimicrobial peptide, is widespread in fish and shows multiple activities, including antimicrobial, antivirus, and antitumor. Here, a new four-cysteine hepcidin isoform gene, EC-hepcidin3, was cloned from the marine-cultured orange-spotted grouper (Epinephelus coioides). The complete cDNA sequence consisted of 603 bases with an open reading frame (ORF) of 270 bases. The genomic DNA sequence was composed of two introns and three exons, and its 312-bp upstream region had multiple putative transcription factor binding sites. Soluble recombinant protein EC-proHep3 containing a His-tag at the C-terminus was obtained from expression plasmid pET-28a/EC-proHep3 in Escherichia coli Rosetta. It was purified by immobilized metal affinity chromatography (IMAC), and it showed antibacterial activity in vitro. Kinetic studies indicated that recombinant EC-proHep3 has strong, rapid activity against Staphylococcus aureus and Pseudomonas stutzeri. The results indicate that EC-hepcidin3 might be an effective component in the innate immune system of groupers. PMID:23291752

Qu, HaiDong; Chen, Bei; Peng, Hui; Wang, KeJian

2013-01-01

375

Biréfringence électrique et polarisabilités moléculaires de CF2Cl-CCl3  

NASA Astrophysics Data System (ADS)

Nous nous proposons de déterminer les valeurs des polarisabilités moléculaires relatives aux trois radiations principales de l'arc au mercure, ainsi que la direction des axes de l'ellipsoïde de polarisabilité optique de CF2Cl-CCl3, à partir des résultats de mesures d'effet Kerr de ce composé à l'état liquide. La biréfringence électrique de CF2Cl-CCl3 change de signe à la température T0=295 K. Ainsi nous obtenons une relation supplémentaire très utile entre les valeurs principales du tenseur de polarisabilité. Nous utilisons pour l'expression de la constante de Kerr la formule de Langevin-Born et faisons appel à la théorie des polarisabilités de liaisons pour calculer la valeur de la polarisabilité principale normale au plan de symétrie de CF2Cl-CCl3.

Benoit-Denis, Anne-Marie

376

Para Candidatos en Programas de Centros de Cuidado y Educacion Infantil con Bebes y "Toddlers": Asociado en Desarrollo Infantil Sistema de Evaluacion y Normas de Competencia CDA (Infant/Toddler Caregivers in Center-Based Programs: The Child Development Associate Assessment System and Competency Standards).  

ERIC Educational Resources Information Center

This Spanish-language booklet outlines the requirements of the Child Development Associate (CDA) credential for caregivers working in center-based infant and toddler day care programs. Part 1 provides an overview of the CDA credentialing system and the various options, settings, standards, and stages of the CDA assessment system. Part 2 explains…

Council for Early Childhood Professional Recognition, Washington, DC.

377

Para Candidatos en Programas de Centros de Cuidado y Educacion Infantil con Ninos de Edad Pre-escolar: Asociado en Desarrollo Infantil Sistema de Evaluacion y Normas de Competencia CDA (Preschool Caregivers in Center-Based Programs: The Child Development Associate Assessment System and Competency Standards).  

ERIC Educational Resources Information Center

This Spanish-language booklet outlines the requirements of the Child Development Associate (CDA) credential for preschool teachers or caregivers who work in center-based preschool day care programs. Part 1 provides an overview of the CDA credentialing system and the various options, settings, standards, and stages of the CDA assessment system.…

Council for Early Childhood Professional Recognition, Washington, DC.

378

Análisis Económico y Producción dEl mAíz (Zea mays l.) AsociAdo con mucunA (Stizolobium aterrimum) En siEmbrA dirEct A y dos sistEmAs dE FErtilizAción nitrogEnAdA  

Microsoft Academic Search

A study with the purpose of observing the profitability and the effect of the dose of nitrous fertilization and the inserted of S. aterrimum in the development and production of the INIAP H-551 hybrid corn planted in two places was carried out. It was found that the dose 200 kg ha -1 of urea fractioned in two applications obtained the

Betty González Osorio; Gorki Díaz Coronel

379

SISTEMA DE PRODUCCIÓN DE LECHE BASADO EN ALFALFA (Medicago sativa) Y MAÍZ (Zea mays) PARA LA ZONA CENTRO SUR. I PRODUCCIÓN DE LECHE 1 A milk production system based on lucerne (Medicago sativa) and corn (Zea mays) silage in the central south zone. I Milk production  

Microsoft Academic Search

For two consecutive years a milk production system was evaluated at Humán Experimental Station, Los Angeles, Chile (37º28`Lat. S and 72º23`Long. W). Four hectares of alfalfa were used alternately for rotational grazing at the prebud stage and for cutting for hay production at the 10% bloom stage. Corn silage (1.8 ha) and alfalfa hay were used during winter. The cows

380

Resistência à fadiga flexuRal dos sistemas RotatóRios k3 e Race em Razão do uso FlexUR al FatigUe ReSiStanCe OF ROtaR y Sy StemS and k3 RaCe beCaUSe OF the USe  

Microsoft Academic Search

Introduction: The aim of this work was to evaluate the cyclic fatigue resistance of two different nickel-tita - nium rotary systems, k3 (Sybron Endo, EUA) and Endosequence (Brasseler, EUA), based on the number of uses. All rotary files which were selected had their conicity of 0,04, 25mm of length and tip diameter of 25, following ISO standardization. Methods: To reach

Luís César Brisighello; Giulio Gavini; Guilherme Augusto Figueiredo; Danilo Minor Shimabuko

381

Nigeria's Second National Development Plan: A Financial Analysis (Second Plan National de Développement du Nigéria: analyse financière) (El Segundo Plan Nacional de Desarrollo de Nigeria: Un análisis financiero)  

Microsoft Academic Search

Cet article analyse les implications du Second Plan National de Développement du Nigéria, 1970-74, pour les principales variables financières, afin d'arriver à déterminer les politiques monétaire et fiscale fondamentales appropriées. Quoique certaines des principales hypothèses du Plan aient nettement changé depuis sa rédaction, notamment en ce qui touche les recettes en provenance du secteur pétrolier et les politiques de commerce

Rattan J. Bhatia; Peter EngstrÃm

1972-01-01

382

El metodo infalible para ganar a la ruleta en 21 dias.  

E-print Network

´atica consistente? Adem´as, ¿son las matem´aticas decidibles? Kurt G¨odel, 1931: Cualquier sistema formal´aticas decidibles? Kurt G¨odel, 1931: Cualquier sistema formal suficientemente potente es inconsistente o incompleto

Figueira, Santiago

383

CURRICULUM VIT# ALTMAN Eitan  

E-print Network

y profesor en un curso de DEA (equivalente a Postgrado) de Redes y Sistemas Distribuidos (24 heures). Titulo del curso : Redes Locales ­ 1998, 1999: Responsable y profesor en un curso de DEA (equivalente a Postgrado) de Redes y Sistemas Distribuidos (24 heures). Titulo del curso : Redes Satelitales ­ 2000: Curso

384

DEPARTAMENTO DE CONTROL AUTOMTICO  

E-print Network

: Robótica. Modelado y control de robots. Utilización de técnicas de inteligencia artificial (redes Ciencias (1999) Cinvestav. Temas de investigación: Redes de petri, sistemas de manufactura flexible investigación: Identificación y control de sistemas no lineales con redes neuronales recurrentes y modelos fuzzy

385

SECCIN DE COMPUTACIN Personal acadmico y temas de investigacin  

E-print Network

interfaces gráficas, modelos deformables para caracterizar macromoléculas biológicas, seguridad en redes de, arquitectura de computadoras, redes de computadoras, sistemas distribuidos y lenguaje de programación de investigación: Redes de Petri y sus aplicaciones, redes neuronales, lógica difusa, sistemas dinámicos de eventos

386

XII Escola de Modelos de Regress~ao, Fortaleza-CE, 13-16 Marco 2011 Atribuic ~ao de Trafego em Redes de Filas Finitas Dependentes do Estado  

E-print Network

Redes de Filas Finitas Dependentes do Estado Guilherme D. Carvalho, Renato A. Nascimento & Frederico R´iculos, baseado em filas finitas configuradas em redes, acoplado ao modelo do ´otimo do sistema, que ´e um dos tr´afego faz sentido e ´e robusta. Palavras-chave: Redes de filas, filas finitas, sistemas estoc

Cruz, Frederico

387

INGENIERA INFORMTICA Coordinador Titulacin: Jos San Martn (jose.sanmartin@urjc.es)  

E-print Network

Fundamentos de Redes de Ordenadores José Centeno, Eva Castro EI Estructuras de la Información Valeria de Mundo Moderno FSD Fundamentos de Sistemas Distribuidos SI Sistemas de Información EDA Estructuras de Datos y Algoritmos Avanzados FIA Fundamentos de Inteligencia Artificial IO Investigación Operativa TD

Rey Juan Carlos, Universidad

388

UNIVERSIDAD NACIONAL AUTNOMA DE MXICO Datos del plan de estudio  

E-print Network

· Sistemas neuromusculares y endócrinos en el ejercicio · Motivación y emoción en el deporte · Trabajo con · Sistemas en el organismo · Actitud y deporte · Caracterización del entrenamiento deportivo · Aplicaciones

Islas, León

389

¿Puede la escuela del siglo XXI educar a los ciudadanos y ciudadanas del siglo XXI?  

Microsoft Academic Search

Los graves problemas de nuestro mundo reclaman una urgente respuesta educativa por parte del sistema escolar, pero esa respuesta no es adecuada, pues dicho sistema sigue funcionando con características muy tradicionales. La educación para la ciudadanía se presenta como una posibilidad de reorientar la educación hacia finalidades más acordes con los retos que ésta debe afrontar actualmente; sin embargo, entre

Francisco F. García Pérez; Nicolás de Alba Fernández

2008-01-01

390

Resonancias colonialistas y heraclitanas en La campana de Julio Ortega  

E-print Network

del sistema, le ofrece a Adán la manzana que éste acepta. En La campana, Rov no es el disruptor del sistema, puesto que no se da cuenta o no le importa estar dentro de una prisión. Sin embargo, ya dentro de la ruptura, sigue cogiendo y comiendo...

Palau de Nemes, Graciela

1980-10-01

391

Obtaining Disaster Assistance for Farms and Ranches (Spanish)  

E-print Network

en Desarrollo Econ?mico de Extensi?n, y Joe L. Outlaw, Profesor y Economista Agr?cola de Extensi?n Sistema Universitario Texas A&M. Producido por AgriLife Communications, El Sistema Texas A&M Las publicaciones de Texas AgriLife Extension se pueden...

Taylor, Greg

2007-10-08

392

Effective 4-H Meetings (Spanish)  

E-print Network

publicaci?n es una versi?n editada y actualizada del ?Manual para L?deres de 4-H de Texas.? Producido por Comunicaciones Agr?colas, El Sistema Universitario Texas A&M Se pueden encontrar publicaciones producidas por el servicio de Extensi?n en el Internet..., Director, Extensi?n Cooperativa de Texas, el Sistema Universitario Texas A&M. ...

Howard, Jeff W.

2005-05-10

393

Herramientas de Autor para Enseñanza y Diagnóstico: IRIS-D  

Microsoft Academic Search

Resumen Los Sistemas Tutores Inteligentes constituyen un grupo de aplicaciones de enseñanza que promueven un aprendizaje individual y flexible basado en el conocimiento y comportamiento del usuario. Hasta ahora estos sistemas han demostrado su efectividad en diversos dominios. Sin embargo su construcción implica un complejo e intenso trabajo de ingeniería del conocimiento, lo que impide un uso más general y

Begoña Ferrero; Ana Arruarte Lasa; Isabel Fernández-castro; Maite Urretavizcaya

2001-01-01

394

AN OPEN COMMUNICATION SYSTEM FOR REMOTE CONTROL AND MONITORING DEDICATED TO INDUSTRIALS APPLICATIONS OVER TCP-IP APPLIED TO PUBLIC NETWORKS  

Microsoft Academic Search

Resumo? Durante os últimos anos, a evolução das redes fieldbus, em conjunto com a simplificação das redes tradicionais de computadores, permitiu a integração de diferentes sistemas de comunicação tanto dentro das células de produção, quanto entre células de produção e outros sistemas para gerência inteligente, supervisão e controle. Várias tecnologias de comunicação já existem atualmente para redes públicas e não-públicas

NÚNZIO TORRISI; FÁBIO FERRAZ JR.; CARLOS M. VALENTE; ARTHUR P. S. BRAGA; JOÃO F. G. OLIVEIRA; A. Doria

395

El gasto público en educación: Algunos aspectos de interés  

Microsoft Academic Search

Se desarrollan algunos aspectos de la economía de la educación que están directamente relacionados con el gasto público. Se exponen datos y esquemas para ayudar a la comprensión de los sistemas educativos de los paises de la OCDE, incidiendose en el sistema educativo español, y justificandose la intervención pública en educación.

Laura de Pablos Escobar

1998-01-01

396

On-Site Wastewater Treatment Systems: Operation and Maintenance (Spanish)  

E-print Network

del sistema de tratamiento de aguas negras porque puede aplastarlos. Los componentes han sido dise?ados para sostener el suelo sobre el sistema, pero no para aguantar que pase equipo sobre ?l. 3 Las aguas negras contienen bacteria natural que...

Lesikar, Bruce J.; Enciso, Juan

2000-08-15

397

Bases para un desarrollo ganadero sostenible: la consideración de la producción animal desde una perspectiva sistémica y el estudio de la diversidad de las explotaciones  

Microsoft Academic Search

1. INTRODUCCIÓN La consideración de los sistemas de producción animal desde una perspectiva puramente económica y mecanicista, basada en rela- ciones causa-efecto, ha conducido en numerosas ocasiones a una falta de coordinación entre los distintos agentes implicados en la mejora de los sistemas de producción y el contexto socioeconómi- co. Esta circunstancia se ha traducido, por un lado, en que

EMMA SERRANO MARTÍNEZ; ÁNGEL RUIZ MANTECÓN

2003-01-01

398

Mosquito Problems after a Storm (Spanish)  

E-print Network

piel. WNF no incluye ninguna in- fecci?n en el sistema nervioso central. WNE es m?s grave y s? afecta el sistema nervioso central. WNE causa inflamaci?n del cerebro, del tejido que rodea al cerebro y a la m?dula espinal o inflamaci?n tanto del...

Johnsen, Mark

2008-08-05

399

CURSO DE PS-GRADUAO EM COMPUTAO APLICADA  

E-print Network

Sistemas Complexos Física Matemática Fundamentos da Teoria de Conjuntos Nebulosos e da Teoria de Possibilidades Inteligência Artificial Inteligência Computacional e Aplicações Introdução à Teoria de Sistemas Teoria do Controle Inteligente Testes de Software Baseado em Modelo Tópicos Especiais em Computação

400

CURSO DE PS-GRADUAO EM COMPUTAO APLICADA  

E-print Network

Matemática Fundamentos da Teoria de Conjuntos Nebulosos e da Teoria de Possibilidades Inteligência Artificial Inteligência Computacional e Aplicações Introdução à Teoria de Sistemas Dinâmicos Matemática Computacional III Imagens Processamento de Alto Desempenho Sistemas Estocásticos Teoria do Controle Inteligente Testes de

401

INFORMÁTICA Y HUMANISMO  

Microsoft Academic Search

La informática, entendida como la ciencia que hace uso del computador u ordenador para optimizar el recurso información, en el manejo o administración de una empresa, mediante los sistemas de información computarizados. Un sistema computarizado esta conformado por hardware, software, procedimientos, personas, bases de datos y documentación en interacción con su entorno.

Ricardo Seminario Vásquez

2008-01-01

402

Uso del Contexto para la Búsqueda de Respuestas en Español  

Microsoft Academic Search

Resumen. Actualmente, la creciente cantidad de información disponible en medios electrónicos representa un reto para la evolución de los mecanismos de acceso y recuperación de la misma. Recientemente los sistemas de Búsqueda de Respuestas (BR) han reaparecido como una alternativa viable a este reto. A pesar su potencial el desarrollo de este tipo de sistemas para el idioma Español aún

Manuel Pérez-Coutiño; Manuel Montes-y-Gómez; Aurelio López-López; Luis Enrique

403

Ai Presidi di Facolt Al Direttore della Scuola Superiore di Studi Avanzati Sapienz  

E-print Network

Ai Presidi di Facoltà Al Direttore della Scuola Superiore di Studi Avanzati Sapienz Ai Direttori di interuniversitari di Ricerca Al Presidente del Sistema Bibliotecario Sapienza Al Direttore del Sistema Bibliotecario Sapienza Al Presidente del Polo Museale Al Direttore del Polo Museale Al Presidente del Centro Info

Di Pillo, Gianni

404

On-Site Wastewater Treatment Systems: Leaching Chambers (Spanish)  

E-print Network

tratamiento de aguas negras C?maras de percolaci?n Bruce Lesikar, Juan Enciso y Russell Persyn Promotores Especialistas de Ingenier?a Agr?cola, Promotor Adjunto de Conservaci?n del Agua El Sistema Universitario Texas A&M Un sistema de c?mara de percola- ci...

Lesikar, Bruce J.; Enciso, Juan

2000-10-13

405

On-Site Wastewater Treatment Systems: Tablet Chlorination (Spanish)  

E-print Network

L-5344S 01-06 Figura 1: La manera m?s com?n de desinfectar los sistemas individuales es la cloraci?n con pastilla. Sistemas individuales para el tratamiento de aguas negras Cloraci?n con pastilla Richard Weaver, Bruce Lesikar y Juan Enciso Profesor...

Weaver, Richard; Lesikar, Bruce J.; Enciso, Juan

2006-01-30

406

On-Site Wastewater Treatment Systems: Gravel-less Pipe (Spanish)  

E-print Network

tratamiento de aguas negras Tuber?a sin grava Bruce Lesikar, Juan Enciso y Russell Persyn Promotores Especialistas de Ingenier?a Agr?cola, Promotor Adjunto de Conservaci?n de Agua El Sistema Universitario Texas A&M L os sistemas de tuber?a sin grava...

Lesikar, Bruce J.; Enciso, Juan

2000-10-13

407

UNIVERSIDAD SIMON BOLIVAR VICE-RECTORADO ADMINISTRATIVO  

E-print Network

QUIMICA OFICIN.A DE ORGANIZACION Y SISTEMAS #12;1 No DE HOJA 11 r MANUAL DE ORGANIZACION ) 1de19 QUIMICA .CONTENIDO 1. ,ORGANIZACION. 1. 1. Descripciin ae la Estructura. 1.2. Organigrama Estructural. 2-RECTORADO ADMINISTRATIVO OFICINA DE OROANIZACION Y SISTEMAS r MANUAL DE ORGANIZACION DEPARTAMENTO DE QUIMICA 2.5. Secciones

Vásquez, Carlos

408

Reasoning about Games via Temporal Logic: A Model Checking Approach  

E-print Network

subconjunto de CTL de primeira ordem, chamado Game Analysis Logic (GAL), para analisar jogos. Um algoritmo Teoria dos Jogos s~ao representados neste contexto. Considerando a forte rela¸c~ao entre jogos e sistemas-agentes. Estudos de casos s~ao tamb´em apresentados. Palavras-chave: Jogos, Verifica¸c~ao de Modelos, Sistemas

Endler, Markus

409

Mster en Ingeniera Informtica y de Telecomunicacin Horarios, Aulas y Periodos de evaluacin -2011-2012  

E-print Network

Computacional Tecnologías de la Información Avanzadas Sistemas Embebidos y Reconfigurables Tratamiento de MIERCOLES JUEVESLUNES AULA C-105 17-18 18-19 Sistemas colaborativos Neurociencia Computacional I: modelos arquitectura para TDS Neurociencia computacional II: análisis e interpretación de la actividad neuronal

Autonoma de Madrid, Universidad

410

Leonel Fernando Perondi CURRICULUM VITAE  

E-print Network

://www.las.inpe.br/~perondi/17.03.2011/SIA_2011.pdf) 2. Modelamento computacional do Sistema de Coleta de Dados Ambientais (em andamento) 3. Modelamento computacional do sistema de controle de atitude e órbita de uma plataforma orbital

411

Contributed Paper Use of Empirically Derived Source-Destination  

E-print Network

. Specifically, we used a genetically based landscape resistance model for American black bears (Ursus americanus-cost path, Ursus americanus, Yellow- stone to Yukon Utilizaci´on de Modelos Fuente-Destino Emp negros americanos (Ursus americanus) para identificar los principales corredores y barreras de movimiento

412

Informe a la Nación indica que el índice de mortalidad por cáncer sigue bajando; la sección especial destaca las tendencias de los cánceres asociados con el VPH y los grados de cobertura de vacunación contra el VPH.  

Cancer.gov

El Informe Anual a la Nación sobre el Estado del Cáncer, de 1975 a 2009, indica que los índices generales de mortalidad por cáncer siguen bajando en los Estados Unidos en hombres y mujeres, entre todos los grupos raciales y étnicos principales y para todos los sitios más comunes de cáncer, como pulmón, colon y recto, seno femenino y próstata.

413

A tool for the continuous assessment and improvement of the student's skills in a mathematics course  

E-print Network

pedagogical and technical to the teacher and researcher. Besides the dramatic increase in communication is presented. Its main features are communication through the internet and use of a computer algebra system caractéristiques principales sont la communication par internet et l'utilisation d'un logiciel de calcul symbolique

Paris-Sud XI, Université de

414

Deteccin Remota de Descargas a la Baha de San Juan, Puerto Rico. Jorge I. Wichy-Rosado  

E-print Network

aguas superficiales a cuerpos de aguas costeras, siempre es de vital importancia para proteger estos residenciales e industriales, tienen un impacto nocivo sobre la fauna y flora de áreas costeras como esta. En la Bahía de San Juan. Por medio de estas imágenes, se detecto que las descargas principales de aguas

Gilbes, Fernando

415

Indios y Mestizos en la España moderna. Estado de la cuestión  

Microsoft Academic Search

En el presente artículo hacemos un balance global sobre la temática de los indios y mestizos en la España Moderna. Durante los primeros años hubo un flujo notable de indios que se frenó en la segunda mitad de la centuria, tras la aprobación de las Leyes Nuevas. Los principales mercados esclavistas de la Península fueron Lisboa y Sevilla. Después de

Esteban Mira Caballos

2008-01-01

416

Mercado interbancario colombiano y manejo de liquidez del Banco de la República  

Microsoft Academic Search

El documento tiene como objetivo describir algunos de los elementos fundamentales del mercado interbancario colombiano y del manejo de liquidez por parte del Banco de la República (BR). El documento explica las diferencias entre las principales operaciones en este mercado y describe los mecanismos a través de los cuales el BR suministra liquidez o recoge excesos de la misma en

Pamela cardozo Ortiz; carlos A. Huertas Campos; Julián A. Parra POlanía; Lina V. Patiño ECheverri

417

Confort thermique et facture énergétique  

Microsoft Academic Search

[fre] Confort thermique et facture énergétique . La forte diffusion du chauffage central entre 1981 et 1993 traduit la priorité accordée par les ménages au confort thermique en matière de qualité de vie : si 67 % seulement des résidences principales étaient équipées de chauffage central en 1981, en 1993 ce taux atteint 83 %. Il est cependant prévisible que

Ibtissam Haehnel

1995-01-01

418

Las ayudas de la Unión Europea a las regiones españolas en el período 1989-1993 : fichas descriptivas y apoyos financieros  

Microsoft Academic Search

Se ofrece una descripción de las ayudas europeas a las regiones españolas en el periodo 1989-1993, prestando especial atención a las canalizadas a través de los fondos estructurales y de las principales iniciativas comunitarias de carácter estructural. La descripción guarda un mismo esquema para cada Comunidad Autónoma y resume los datos ofrecidos en la publicación 'Las regiones españolas en la

José Antonio Nieto Solís; Alfonso Utrilla de la Hoz

1996-01-01

419

REMARQUES SUR LES PRISMES A DVIATION CONSTANTE Par M. R. DE MALLEMANN.  

E-print Network

REMARQUES SUR LES PRISMES A D�VIATION CONSTANTE Par M. R. DE MALLEMANN. Faculté des Sciences de (~) : « Dans tout prisme à déviation constante, il existe une droite normale à la section principale, telle que toute rotation finie du prisme, autour de cette droite prise comme axe, ne détermine aucun déplacement

Boyer, Edmond

420

Colloque Franco-Tchque Trends in Business , 24 juin 2010 La question controverse de la performance dans les joint-ventures  

E-print Network

performance dans les joint-ventures internationales (JVI) Une revue de la littérature Dora TRIKI ATER performance dans le cadre des relations coopératives et en particulier les joint-ventures internationales. En reprenant les principales critiques qui leur sont adressées. Mots clés : joint-ventures internationales

Boyer, Edmond

421

El gasto público social frente a la infancia: análisis del Programa JUNTOS y de la oferta y demanda de servicios asociados a sus condiciones  

Microsoft Academic Search

El presente estudio busca contribuir con la literatura sobre los programas de Transferencia Condicionada de Dinero (conocidos como Condicional Cash Transfer, CCT por sus siglas en inglés) y del programa JUNTOS en particular, realizando una investigación sobre cambios en el estado de oferta y demanda asociadas a las condiciones del programa. Ello se realiza desde la perspectiva de los principales

Lorena Alcázar

2009-01-01

422

DESCENTRALIZACIÓN EDUCATIVA Y PROGRAMAS NACIONALES DE MEJORA  

Microsoft Academic Search

La evolución del gasto público en educación en los últimos 25 años refleja la descentralización de competencias que ha tenido lugar en España, en desarrollo de la Constitución. Nuestro país se une así a la tendencia internacional de descentralización regional y\\/o local del gasto público educativo. Este trabajo describe los principales indicadores que permiten comparar el modelo español con los

María Jesús; San Segundo

423

Las políticas de gasto en educación y enseñanza universitaria  

Microsoft Academic Search

Aproximación a los principales indicadores de política educativa en el análisis comparado. También se estudia la evolución del gasto público en educación y en enseñanza universitaria, analizando los distintos tipos de actuaciones que integran esta política y los agentes responsables de realizarla.

Carmen Pérez Esparrels; Alfonso Utrilla de la Hoz

1996-01-01

424

Nuestro Instituto  

Cancer.gov

Información acerca de nuestra misión como Instituto Nacional del Cáncer, así como sobre los diferentes tipos de investigación que apoya nuestro Instituto, el programa de centros oncológicos, y sobre el Informe Anual a la Nación acerca del cáncer, el cual es preparado por las principales organizaciones oncológicas de los Estados Unidos.

425

Fiche de poste Rfrence du poste : 11INSB17  

E-print Network

'application de protocoles de transformation génétique des algues marines par différentes approches, ainsi qu'au suivi de ces algues en culture. ACTIVITES PRINCIPALES : - Conduire des expériences courantes de cultures d'algues - Formaliser et actualiser les protocoles techniques concernant la préparation de matériel

Canet, Léonie

426

C. R. Acad. Sci. Paris, t. 330, Srie I, p. 10911096, 2000 Systmes dynamiques/Dynamical Systems  

E-print Network

hyperbolicity of the tori. A particular case is studied by Easton [5]. Our proof is based on the following key par R.W. Easton [5]. La principale difficulté est liée à l'hyperbolicité partielle de ces objets. La

427

Approche compare du dveloppement des villes-ports l'chelle mondiale : problmes conceptuels et mthodologiques  

E-print Network

Ducruet, Docteur en Géographie Email : dcducruet@aol.com Institut Coréen de Recherche sur les Espaces mécanismes que connaissent les villes-ports dans leur individualité et au sein de leur espace national, ce entre lurbain, le portuaire et le maritime. Lanalyse en composantes principales souligne certains

Paris-Sud XI, Université de

428

Structure des ADN complmentaires des lactoprotines : application la recherche des gnes et leur localisation chromosomique  

E-print Network

Structure des ADN complémentaires des lactoprotéines : application à la recherche des gènes et à entrepris. 1) Construction de banques ovine et bovine d ADN complémentaires !ADNcJ. Sélection et identification des clones recombinants contenant les ADN complé- mentaires des ARNm des 6 principales

Paris-Sud XI, Université de

429

CecileBernard La escasez de alimentos que. con distinto gr&o. afectz a  

E-print Network

-,- .e CI' I CecileBernard La escasez de alimentos que. con distinto gr&o. afectz a la mayoría de respecta al abasto de alimentos, se reactiva una institución creada en 1965, la CONASUPO (CompaFh Na alimentos principales (tortillas, enva- sado de la leche), monopoliode la importación de granos (M. Durand

Paris-Sud XI, Université de

430

El Control Legal del Gasto en el Ámbito de las Haciendas Locales  

Microsoft Academic Search

El control del gasto es una de las principales preocupaciones de la gestión pública, en cualquier nivel de Administración, ya sea Central, Autonómica o Local. En la gestión en general, es vital la información: su cuantía ( la suficiente), la rapidez con la que se obtiene ( oportunidad), quién la necesita (características de los demandantes), cómo se presenta ( los

Aurelia Valiño Castro; Laura de Pablos Escobar

2000-01-01

431

Movilidad de rentas y salarios desde una perspectiva de género: el papel de la educación  

Microsoft Academic Search

El presente trabajo comienza revisando los fundamentos de las teorías de demanda de educación como bien de inversión a nivel microeconómico, indicando la metodología y los resultados de algunos de los principales estudios aplicados realizados en España. Dichos estudios se han basado en el análisis de los rendimientos educativos. En nuestro trabajo estudiaremos también, y para el caso español, cuáles

Laura de Pablos Escobar; María Gil Izquierdo

2006-01-01

432

Transformación económica, políticas y producción de la segregación social en Chile y México  

Microsoft Academic Search

Basado en los conceptos de la segregación residencial se analizan los principales cambios en Santiago de Chile y en la Ciudad de México en las últimas décadas. Analíticamente se trata de destacar el rol de las políticas para la producción de formas específicas de la segregación. En este contexto se analiza la relación entre la transformación socioeconómica y los cambios

Karin Fischer; Johannes Jäger; Christof Parnreiter

2007-01-01

433

Estimación de la senda óptima de extracción para un recurso natural no renovable: caso de estudio para la actividad carbonífera a cielo abierto en el  

Microsoft Academic Search

la economía de los recursos naturales, permite conocer la forma como se extrae sosteniblemente un recurso natural renovable y no renovable. De esta forma, el presente estudio con información financiera y sobre costos totales de producción (estimados mediante un modelo de datos panel con efectos aleatorios), para siete principales empresas explotadoras de carbón en el centro del departamento del Cesar,

Jorge Andrés Perdomo Calvo; Ana María Jaramillo Pérez; Juan Carlos Mendieta López

2010-01-01

434

INFECTION EXPRIMENTALE DE LA BREBIS AVEC SALMONELLA ABORTUS OVIS  

E-print Network

INFECTION EXP�RIMENTALE DE LA BREBIS AVEC SALMONELLA ABORTUS OVIS: INFLUENCE DU STADE DE GESTATION, Nouzilly, 37380 Monnaie, France Summary EXPERIMENTAL INFECTION OF EWES WITH SALMONELLA ABORTUS OVIS ovis abortive infection. La principale manifestation clinique du pouvoir pathogène de Salmonella

Paris-Sud XI, Université de

435

El turismo político durante la Guerra Civil: viajeros británicos y técnicas de hospitalidad en la España republicana, 1936-1939  

Microsoft Academic Search

Este trabajo estudia uno de los principales medios de propaganda que empleó la República española para conquistar a la opinión internacional durante la Guerra Civil: los viajes organizados de personalidades extranjeras. El turismo político, a veces considerado como una peculiaridad de los regímenes socialistas, fue empleado por los dos bandos durante el conflicto, pero los republicanos lo practicaron con más

Hugo García

2006-01-01

436

Modelo gravitatorio y turismo: Una aplicación a los flujos monetarios interregionales del sector Turismo en España  

Microsoft Academic Search

RESUMEN: Este trabajo analiza los flujos monetarios domésticos del sector Turismo en España mediante diferentes especificaciones del modelo gravitatorio, aplicados a tres estimaciones alternativas de los flujos monetarios bilaterales. Los modelos han permitido identificar las principales variables que actúan como factores de atracción de los flujos interregionales, obteniendo elasticidades diferentes para la variable distancia a las observadas en los flujos

Tamara de la Mata; Carlos Llano

2010-01-01

437

Sul problema del cambiamento di variabili nella teoria delle distribuzioni  

Microsoft Academic Search

Riassunto  Il seguente lavoro ha come scopo principale quello di studiare, nell'ambito della teoria delle distribuzioni diL. Schwartz, il problema di una trasformazione di variabili. In particolare si dimostrano alcune formule relative alle funzioni «singolari»\\u000a di Dirac di uso frequente nelle teorie quantistiche.

S. Albertoni; M. Cugiani

1951-01-01

438

Impacto de las Tecnologías de la Información y las Comunicaciones (TIC) en el desarrollo y la competitividad del país  

Microsoft Academic Search

La primera parte de este estudio caracteriza al sector de telecomunicaciones en Colombia, comparando a Colombia con otros países y regiones del mundo, mostrando la evolución de algunos de los principales indicadores de telecomunicaciones. En la segunda parte se hacen estimaciones cuantitativas del impacto socioeconómico del sector en la economía colombiana, a través de dos herramientas: la metodología insumo-producto y

Juan Benavides; Felipe Castro; Lina Devis; Mauricio Olivera

2011-01-01

439

Tecnología de información e innovación. Factores clave de la competitividad en las pequeñas y medianas empresas  

Microsoft Academic Search

En el presente trabajo se muestran algunas políticas ejecutadas por el gobierno nacional, en función de im- pulsar el desarrollo científico y tecnológico del país, así como las principales limitaciones que presentan las peque- ñas y medianas empresas (pymes) para acceder a las tecnologías de información y comunicación, tomando como base los resultados de un diagnóstico efectuado a 8 pymes

Leal Morantes; Miraidy Elena

440

Los pilares de las redes 4G: QoS, AAA y Movilidad  

Microsoft Academic Search

Introducción Aún cuando no han aparecido de forma comercial las redes móviles de 3ª generación, que llegarán acompañando a la tecnología UMTS, ya se vislumbra la próxima generación, cuyas principales características podrían resumirse en: núcleo IP, ubicuidad y servicios. En primer lugar se basan en un núcleo IP encargado de ofrecer el transporte en la red, sobre esta base se

Antonio Cuevas; Carlos García; José Ignacio Moreno; Ignacio Soto

441

I Congreso Internacional "Los Ciudadanos y la Gestin de la Movilidad", 25-27 Septiembre 2006, Madrid (Espaa) (2006) 16 p.  

E-print Network

I Congreso Internacional "Los Ciudadanos y la Gestión de la Movilidad", 25-27 Septiembre 2006, Madrid (España) (2006) 16 p. MOVILIDAD Y DESIGUALDADES SOCIALES Y TERRITORIALES Dra. Lourdes Díaz Olvera desigualdades de movilidad. Primero abordamos los principales resultados de una investigación sobre la medida

Paris-Sud XI, Université de

442

Morfología de la ciudad y movilidad intraurbana: Guadalajara al borde de la parálisis  

Microsoft Academic Search

La movilidad espacial de la población es mayor en las áreas centrales de la ciudad y en aquellos lugares donde la densidad de arterias principales es elevada. Las grandes avenidas producen su propia demanda ocasionando su rápida saturación y congestionamiento. Guadalajara es la segunda ciudad en importancia en México y enfrenta problemas de circulación y congestionamiento vehicular, particularmente en el

Javier Rentería Vargas; Abel Hugo Ruiz Velazco Castañeda

2007-01-01

443

Inmigrantes ucranianos en España. Una aproximación a las pautas de movilidad internacional  

Microsoft Academic Search

Desde principios de los años noventa las pautas de movilidad internacional de los inmigrantes ucranianos en Europa Central y Occidental se caracterizan por su temporalidad, circularidad e irregularidad. Partiendo de este supuesto se examinan en este artículo los patrones de movilidad de los ucranianos inmigrados a España. Como principales categorías de descripción se utilizan los indicadores de temporalidad de desplazamiento,

Renáta Hosnedlová; Mikolaj Stanek

2010-01-01

444

Actes du colloque, 27-31 mai 2002, Garoua, Cameroun Jamin J.Y., Seiny Boukar L., Floret C. (diteurs scientifiques),  

E-print Network

, Acacia senegal, Acacia hockii, Acacia gerrardii) principalement exploitées dans la région de Kaélé est tables for four of the most harvested species in the region of Kaélé (Anogeissus leiocarpus, Acacia senegal, Acacia hockii, Acacia gerrardii) is thereby presented in this paper. Introduction Au Nord

Paris-Sud XI, Université de

445

www.urjc.es Curso Universitario  

E-print Network

comunicación con la audiencia objetivo a través de las redes sociales, etc. DIRIGIDO A: todos los estudiantes y ESPECIFICOS · Desarrollo de una estrategia de Social Media · Conocimiento de las principales redes socialeswww.urjc.es Curso Universitario en Social Media & Community Manager Vicerrectorado de Títulos

Rey Juan Carlos, Universidad

446

AHORA NOS TOCA A NOSOTROS VENIR A HACER : MIGRACIONES DE IDA Y VUELTA Y RECONSTRUCCIN DE LA IDENTIDAD NACIONAL  

E-print Network

ante situaciones de crisis. Los lazos culturales y las redes sociales hacen de España uno de los a reactivar este fenómeno. Los lazos culturales y las redes sociales hacen de España uno de los principales

Paris-Sud XI, Université de

447

HERBERT A. SIMON Y LA ECONOMÍA ORGANIZACIONAL  

Microsoft Academic Search

Este artículo analiza los aspectos centrales de la obra de Herbert A. Simon, en especial el orientado al análisis de la economía de las organizaciones con énfasis en el criterio de racionalidad limitada. Se interpreta la crítica de Simon a la versión ortodoxa de la burocracia organizacional y se extiende su análisis hacia la economía institucional. Uno de los principales

Fernando Estrada Gallego

2007-01-01

448

J. Phys. ill France 4 (1994) 2235-2247 NOVEMBER 1994, PAGE 2235 Classification  

E-print Network

bismuth Bi~sr~cai_~TR~CU~O~~~ : le ckrium et le dysprosium F. Jordan ('), O. Pefia ('j et E. Laxmi phenomena and superconductivity. We report results obtained after substitution by dysprosium (a strongly dysprosium ce demier ayant fait l'objet d'un travail ddtailld [41, nous discuterons ici ses principales

Paris-Sud XI, Université de

449

Informe Anual a la Nación indica que los índices generales de cáncer siguen disminuyendo; su sección especial destaca las tendencias actuales y pronósticos del cáncer colorrectal  

Cancer.gov

Los índices de casos nuevos diagnosticados y los índices de muertes de todos los tipos de cáncer combinados disminuyeron en forma considerable en el período más reciente para hombres y mujeres en general, y para la mayoría de las poblaciones raciales y étnicas de Estados Unidos, según un informe de las principales organizaciones de salud y oncológicas.

450

UNIVERSITE DE NICE-SOPHIA ANTIPOLIS UFR Sciences cole Doctorale en Sciences Fondamentales et Appliques  

E-print Network

teneurs en arsenic font de la géologie la cause principale de cette contamination. L'intérêt de ce travail This work aimed to solve a local problem of high water contamination with natural arsenic. In order repartition of arsenic content makes the consequences of this contamination to the geology. The interest

Paris-Sud XI, Université de

451

Two species in the Ceratocystis coerulescens complex from conifers in western North America  

E-print Network

Engelmann spruce (Picea enge/mannjj Parry) and white spruce (Picea glauca (Moench) Voss) in British Columbia'epinette blanche (Picea glauca (Moench) Voss), en Colombie Canadienne. Ce champignon cst une composante principale Dendrocrol1us rufipennis, qui infcste I'epinette d'Engelmann (Picea engelmannii Parry) aussi bien que I

452

COLLISION INDE-ASIE 3. Grandes structures gologiques  

E-print Network

principales; 16. Linéations (axes de plis, failles et fractures secondaires). Ko=Khotan; Ks=Mont Kailas; La=Ladakh Crétacé sup. ­ Eocène (batholite du Ladakh, volcans calco-alcalins paléogènes), mise en place sur la marge

Déverchère, Jacques

453

FACULTE DE BIOLOGIE ET DE MEDECINE Dpartement d'Ecologie et Evolution  

E-print Network

. berus), structuration génétique et multipaternité chez Vipera berus Thèse de doctorat ès science de la la Conservation Phylogéographie des principales vipères européennes (Vipera ammodytes, V. aspis et V

Alvarez, Nadir

454

LITHOGRAPHIE LASER : DWL 200 Equipement de lithographie laser pour la production de masques ou rticules, l'criture directe sur  

E-print Network

LITHOGRAPHIE LASER : DWL 200 Equipement de lithographie laser pour la production de masques ou réticules, l'écriture directe sur wafers et le contrôle de processus. CARACTERISTIQUES PRINCIPALES Laser He une technologie de génération de pixels par balayage laser. Cette technologie permet de produire des

Ingrand, François

455

Une classe de grammaires cat egorielles apprenable a partir d'Exemples Typ es  

Microsoft Academic Search

La classe des grammaires cat egorielles dites AB ou classiques a donn e lieu ces derni eres ann ees a des r esultats d'apprenabilit e au sens de Gold (principalement dus a Kanazawa) int eressants. Cette classe m erite d'^ etre etudi ee parce que ses membres permettent de g en erer l'ensemble des lan- gages alg ebriques et parce

Daniela Dudau-Sofronie; Isabelle Tellier; Marc Tommasi

2002-01-01

456

Matematica Interactiva  

NSDL National Science Digital Library

Los materiales para el Proyecto de MATEMATICA INTERACTIVA se dividen en tres categorias principales: actividades, discusiones y lecciones. Existe un material adicional de soporte que es una vision general del proyecto, un diccionario y estadares para los cursos intermedios de matematicas.

Shodor

457

Sites multiples de l'azote atomique observs par luminescence et thermoluminescence dans l'azote actif condens 5 K  

E-print Network

673 Sites multiples de l'azote atomique observés par luminescence et thermoluminescence dans l. La thermoluminescence de chacune des trois raies principales, ainsi que les déclins iso- thermes à allowed us to describe the behaviour of the three trapping sites. Thermoluminescence of each of the three

Paris-Sud XI, Université de

458

Influencia Árabe en algunos aspectos de la vida Occidental  

Microsoft Academic Search

Los hombres y mujeres occidentales del siglo XXI todavía no se han percatado que muchos y muy variados usos y costumbres de su vida cotidiana son de origen árabe o fueron introducidos por ellos en la cultura de origen europeo. La península Hispánica fue una de las principales puertas de entrada de la civilización musulmana en Europa, donde el al-Andalus

Jorge Rampelbergh

459

Shared Responsibility for Teacher Evaluation: A Cross-Site Study of Principals' Experiences in Peer Assistance and Review Programs  

ERIC Educational Resources Information Center

Research shows that traditional, principal-led teacher evaluation in the United States is desperately in need of reform. While principals aspire to be instructional leaders, their attention is spread thin across their vast managerial and instructional leadership responsibilities. For many principals, teacher evaluation falls by the wayside. Peer…

Munger, Mindy S.

2012-01-01

460

Universit de Grenoble; France Ecole Doctorale de Chimie et Science du Vivant  

E-print Network

in photosynthesis, transcription and translation. Gene expression, involves two types of RNA polymerases, NEP transcription by sigma factors and anti-sense RNAs in Arabidopsis thaliana. Thesis To obtain the grade of Doctor protéines principalement impliquées dans la photosynthèse, la transcription et la traduction. L

Paris-Sud XI, Université de

461

prsente L'UFR DES SCIENCES ET TECHNIQUES  

E-print Network

STOCKAGE DE L'HYDROGÃ?NE : ANALYSE THERMODYNAMIQUE DE LA FORMATION D'HYDRURES MÃ?TALLIQUES ET OPTIMISATION DU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 PARTIE I STOCKAGE D'HYDROGÃ?NE 17 1. L'HYDROGÃ?NE, VECTEUR D principales formes de stockage . . . . . . . . . . . . . . . . . . . . . . . . 21 1.2.1 Stockage gazeux

Paris-Sud XI, Université de

462

Spectroscopies thermique et optique des niveaux profonds : Application l'tude de leur relaxation de rseau (*) (**)  

E-print Network

631 Spectroscopies thermique et optique des niveaux profonds : Application à l'étude de leur. 2014 Après avoir rappelé les principales caractéristiques des techniques de spectroscopie thermique des défauts profonds dans les semiconducteurs (DLTS), nous décrivons la technique de spectroscopie optique que

Boyer, Edmond

463

Ecole Doctorale 364 : Sciences Fondamentales et Appliques Nattribu par la bibliothque  

E-print Network

avancer dans mon travail. Je pense principalement à « l'équipe TABOO » et notamment à Lionel FREIRE, Simon sa camaraderie et ses craquages devant son PC, Mathilde pour les moments partagés, Grand-Seb pour son

Paris-Sud XI, Université de

464

Une cartographie des indfinis free choice du franais Claude Muller (Bordeaux & CNRS: UMR CLLE, 5263)  

E-print Network

1 Une cartographie des indéfinis free choice du français Claude Muller (Bordeaux & CNRS: UMR CLLE. It requires some modifications in the cartography of French indefinite pronouns proposed in Haspelmath 1997 la cartographie des indéfinis du français proposée dans Haspelmath 1997. Les deux principales

Paris-Sud XI, Université de

465

LA TEORÍA DE EVOLUCIÓN DESDE UNA PERSPECTIVA HOLÍSTICA  

Microsoft Academic Search

El presente ensayo analiza las principales teorias evolutivas desde Darwin hasta la fecha, entre ellas la teoría de Lamark y la Teoría de la Quimiosintética, todas ellas con un sesgo fuertemente biologico, donde los cambios más decisivos en la homnización que se observan son: la adquisición de la postura erecta, que liberó sus extremidades anteriores y el desarrollo del cerebro,

Fredy Hardy Wompner Gallardo

2010-01-01

466

Rupture sous-cutanée du tendon long extenseur du pouce: à propos de 5 cas  

PubMed Central

La rupture spontanée du muscle long extenseur du pouce (EPL) du tendon au niveau du poignet est rare et principalement rapportés après fracture du radius distal à tubercule de Lister, dans la synovite, ténosynovite ou la polyarthrite rhumatoïde. Nous rapportons 5 cas de rupture spontanée du tendon long extenseur du pouce, traités par une greffe ou un transfert tendineux. PMID:25317233

Abdelillah, Rachid; Abbassi, Najib; Erraji, Moncef; Abdeljawad, Najib; Yacoubi, Hicham; Daoudi, Abdelkrim

2014-01-01

467

Identification de ligands des enzymes de rsistance aux aminoglycosides par RMN. NMR identification of ligands of aminoglycoside resistance enzymes.  

E-print Network

- 1 - Identification de ligands des enzymes de résistance aux aminoglycosides par RMN. NMR identification of ligands of aminoglycoside resistance enzymes. Frédérique Maurice1 , Guillaume Bégis2 , Laurent principalement la conséquence de l'action d'enzymes qui modifient chimiquement ces antibiotiques et les empêchent

Paris-Sud XI, Université de

468

Calcul Moulien Jacky CRESSON  

E-print Network

´ecise de la notion de moule ainsi que les principales propri´et´es de ces objets. On interpr`ete les diff´erentes sym´etries (alterna(e)l,symetra(e)l) des moules via les s´eries formelles non commutatives asso........................................................................................... 6 Pr´esentation standard des moules

469

Informe Anual a la Nación indica una reducción en los índices de incidencia y mortalidad por cáncer; una sección especial revela amplias variaciones en las tendencias del cáncer de pulmón en los estados  

Cancer.gov

Un nuevo informe de las principales organizaciones oncológicas del país muestra que, por primera vez desde la primera publicación del informe en 1998, tanto el índice de incidencia como el de mortalidad para todos los cánceres combinados están disminuyendo en hombres y mujeres.

470

On-Site Wastewater Treatment Systems: Aerobic Treatment Unit (Spanish)  

E-print Network

Sistemas individuales para el tratamiento de aguas negras Fosa de basura de un compartimiento Cloronizador Unidad de tratamiento aer?bico Rociadores Tanque bomba Unidad de tratamiento aer?bico Bruce Lesikar y Juan Enciso Promotores Especialistas de... Ingenier?a Agr?cola El Sistema Universitario Texas A&M L-5302S 8-00 Figura 1: Un sistema individual para el tratameinto de agua negras con una unidad de tratamiento aer?bico. L as unidades aer?bicas tratan las aguas negras para las casas y los negocios...

Lesikar, Bruce J.; Enciso, Juan

2000-08-29

471

Diketopiperazine Derivatives from the Marine-Derived Actinomycete Streptomyces sp. FXJ7.328  

PubMed Central

Five new diketopiperazine derivatives, (3Z,6E)-1-N-methyl-3-benzylidene-6-(2S-methyl-3-hydroxypropylidene)piperazine-2,5-dione (1), (3Z,6E)-1-N-methyl-3-benzylidene-6-(2R-methyl-3-hydroxypropylidene)piperazine-2,5-dione (2), (3Z,6Z)-3-(4-hydroxybenzylidene)-6-isobutylidenepiperazine-2,5-dione (3), (3Z,6Z)-3-((1H-imidazol-5-yl)-methylene)-6-isobutylidenepiperazine-2,5-dione (4), and (3Z,6S)-3-benzylidene-6-(2S-but-2-yl)piperazine-2,5-dione (5), were isolated from the marine-derived actinomycete Streptomyces sp. FXJ7.328. The structures of 1–5 were determined by spectroscopic analysis, CD exciton chirality, the modified Mosher’s, Marfey’s and the C3 Marfey’s methods. Compound 3 showed modest antivirus activity against influenza A (H1N1) virus with an IC50 value of 41.5 ± 4.5 ?M. In addition, compound 6 and 7 displayed potent anti-H1N1 activity with IC50 value of 28.9 ± 2.2 and 6.8 ± 1.5 ?M, respectively. Due to the lack of corresponding data in the literature, the 13C NMR data of (3Z,6S)-3-benzylidene-6-isobutylpiperazine-2,5-dione (6) were also reported here for the first time. PMID:23538868

Wang, Pei; Xi, Lijun; Liu, Peipei; Wang, Yi; Wang, Wei; Huang, Ying; Zhu, Weiming

2013-01-01

472

Viperin protein expression inhibits the late stage of respiratory syncytial virus morphogenesis.  

PubMed

We examined the effect of respiratory syncytial virus (RSV) infection on viperin protein expression in the permissive HEp2 and non-permissive RAW 264.7 macrophage cell lines. In RSV-infected HEp2 cells low levels of the viperin protein was localized to the virus-induced inclusion bodies and did not impair virus transmission in these cells. In contrast, RSV-infected RAW 264.7 cells increased expression of the STAT1 protein occurred at between 6 and 12h post-infection, which coincided with the appearance of P-STAT1. A relatively high level of viperin protein expression was detected in infected RAW 264.7 cells, and it was extensively localized throughout the cytoplasm of infected cells. The effect of early viperin protein expression on RSV infection in cells that are normally permissive to RSV cultivation was examined by using either transient transfected HEp2 cells or stable transfected HeLa cells that expressed the viperin protein. The early expression of viperin in HeLa cells did not prevent virus infection, and no significant inhibitory effect on either virus protein expression or targeting of virus proteins to the cell surface was noted. However, while inclusion body formation was not inhibited, early viperin protein expression was associated with the inhibition of virus filament formation and reduced cell-to-cell virus transmission. Inhibition of virus filament formation was also observed in HEp2 cells expressing viperin. Collectively our data suggested that viperin impaired RSV transmission by inhibiting virus filament formation, providing a basis for its anti-virus activity in RSV-infected cells. PMID:25433308

Jumat, Muhammad Raihan; Huong, Tra Ngyen; Ravi, Laxmi Iyer; Stanford, Rebecca; Tan, Boon Huan; Sugrue, Richard J

2015-02-01

473

Evolution of microbes and viruses: a paradigm shift in evolutionary biology?  

PubMed

When Charles Darwin formulated the central principles of evolutionary biology in the Origin of Species in 1859 and the architects of the Modern Synthesis integrated these principles with population genetics almost a century later, the principal if not the sole objects of evolutionary biology were multicellular eukaryotes, primarily animals and plants. Before the advent of efficient gene sequencing, all attempts to extend evolutionary studies to bacteria have been futile. Sequencing of the rRNA genes in thousands of microbes allowed the construction of the three- domain "ribosomal Tree of Life" that was widely thought to have resolved the evolutionary relationships between the cellular life forms. However, subsequent massive sequencing of numerous, complete microbial genomes revealed novel evolutionary phenomena, the most fundamental of these being: (1) pervasive horizontal gene transfer (HGT), in large part mediated by viruses and plasmids, that shapes the genomes of archaea and bacteria and call for a radical revision (if not abandonment) of the Tree of Life concept, (2) Lamarckian-type inheritance that appears to be critical for antivirus defense and other forms of adaptation in prokaryotes, and (3) evolution of evolvability, i.e., dedicated mechanisms for evolution such as vehicles for HGT and stress-induced mutagenesis systems. In the non-cellular part of the microbial world, phylogenomics and metagenomics of viruses and related selfish genetic elements revealed enormous genetic and molecular diversity and extremely high abundance of viruses that come across as the dominant biological entities on earth. Furthermore, the perennial arms race between viruses and their hosts is one of the defining factors of evolution. Thus, microbial phylogenomics adds new dimensions to the fundamental picture of evolution even as the principle of descent with modification discovered by Darwin and the laws of population genetics remain at the core of evolutionary biology. PMID:22993722

Koonin, Eugene V; Wolf, Yuri I

2012-01-01

474

In vitro evaluation of 9-(2-phosphonylmethoxyethyl)adenine ester analogues, a series of anti-HBV structures with improved plasma stability and liver release.  

PubMed

Chronic hepatitis B virus (HBV) infection may lead to liver cirrhosis and hepatocellular carcinoma, but few drugs are available for its treatment. Acyclic nucleoside phosphonates (ANPs) have remarkable antivirus activities but are not easily absorbed from the gastrointestinal tract and accumulate in the kidneys, resulting in nephrotoxicity. Therefore, there is a need to find effective liver site-specific prodrugs. The dipivaloyloxymethyl ester of 9-(2-phosphonylmethoxyethyl)adenine (PMEA)-adefovir dipivoxil (ADV)-is a first-line therapy drug for chronic hepatitis B with a low therapeutic index because of renal toxicity and low hepatic uptake. In this study, a series of PMEA derivatives were synthesized to enhance plasma stability and liver release. The metabolic stability of ADV (Chemical I) and its two analogues (Chemicals II and III) was evaluated in rat plasma and liver homogenate in vitro. An ion-pair reverse-phase HPLC-UV method and a hybrid ion trap and high-resolution time-of-flight mass spectrometry (LC-IT-TOF-MS) were used to evaluate the degradation rate of the analogues and to identify their intermediate metabolites, respectively. Chemicals I and II were hydrolyzed by cleavage of the C-O bond to give monoesters. Sufficient enzymatic activation in the liver homogenate through a relatively simple metabolic pathway, in addition to a favorable stability profile in rat plasma, made Chemical II an optimal candidate. Next, six analogues based on the structure of Chemical II were synthesized and evaluated in plasma and liver homogenate. Compared to Chemical II, these compounds generated less active PMEA levels in rat liver homogenate. Therefore, chemical modification of Chemical II may lead to new promising PMEA derivatives with enhanced plasma stability and liver activation. PMID:24338503

Liao, Sha; Fan, Shi-Yong; Liu, Qin; Li, Chang-Kun; Chen, Jia; Li, Jing-Lai; Zhang, Zhi-Wei; Zhang, Zhen-Qing; Zhong, Bo-Hua; Xie, Jian-Wei

2014-11-01

475

De Novo Characterization of the Spleen Transcriptome of the Large Yellow Croaker (Pseudosciaena crocea) and Analysis of the Immune Relevant Genes and Pathways Involved in the Antiviral Response  

PubMed Central

The large yellow croaker (Pseudosciaena crocea) is an economically important marine fish in China. To understand the molecular basis for antiviral defense in this species, we used Illumia paired-end sequencing to characterize the spleen transcriptome of polyriboinosinic:polyribocytidylic acid [poly(I:C)]-induced large yellow croakers. The library produced 56,355,728 reads and assembled into 108,237 contigs. As a result, 15,192 unigenes were found from this transcriptome. Gene ontology analysis showed that 4,759 genes were involved in three major functional categories: biological process, cellular component, and molecular function. We further ascertained that numerous consensus sequences were homologous to known immune-relevant genes. Kyoto Encyclopedia of Genes and Genomes orthology mapping annotated 5,389 unigenes and identified numerous immune-relevant pathways. These immune-relevant genes and pathways revealed major antiviral immunity effectors, including but not limited to: pattern recognition receptors, adaptors and signal transducers, the interferons and interferon-stimulated genes, inflammatory cytokines and receptors, complement components, and B-cell and T-cell antigen activation molecules. Moreover, the partial genes of Toll-like receptor signaling pathway, RIG-I-like receptors signaling pathway, Janus kinase-Signal Transducer and Activator of Transcription (JAK-STAT) signaling pathway, and T-cell receptor (TCR) signaling pathway were found to be changed after poly(I:C) induction by real-time polymerase chain reaction (PCR) analysis, suggesting that these signaling pathways may be regulated by poly(I:C), a viral mimic. Overall, the antivirus-related genes and signaling pathways that were identified in response to poly(I:C) challenge provide valuable leads for further investigation of the antiviral defense mechanism in the large yellow croaker. PMID:24820969

Ding, Yang; Ao, Jingqun; Hu, Songnian; Chen, Xinhua

2014-01-01

476

A Novel MVA Vectored Chikungunya Virus Vaccine Elicits Protective Immunity in Mice  

PubMed Central

Background Chikungunya virus (CHIKV) is a re-emerging arbovirus associated with febrile illness often accompanied by rash and arthralgia that may persist for several years. Outbreaks are associated with high morbidity and create a public health challenge for countries affected. Recent outbreaks have occurred in both Europe and the Americas, suggesting CHIKV may continue to spread. Despite the sustained threat of the virus, there is no approved vaccine or antiviral therapy against CHIKV. Therefore, it is critical to develop a vaccine that is both well tolerated and highly protective. Methodology/Principal Findings In this study, we describe the construction and characterization of a modified Vaccinia virus Ankara (MVA) virus expressing CHIKV E3 and E2 proteins (MVA-CHIK) that protected several mouse models from challenge with CHIKV. In particular, BALB/c mice were completely protected against viremia upon challenge with CHIKV after two doses of MVA-CHIK. Additionally, A129 mice (deficient in IFN?/?) were protected from viremia, footpad swelling, and mortality. While high anti-virus antibodies were elicited, low or undetectable levels of neutralizing antibodies were produced in both mouse models. However, passive transfer of MVA-CHIK immune serum to naïve mice did not protect against mortality, suggesting that antibodies may not be the main effectors of protection afforded by MVA-CHIK. Furthermore, depletion of CD4+, but not CD8+ T-cells from vaccinated mice resulted in 100% mortality, implicating the indispensable role of CD4+ T-cells in the protection afforded by MVA-CHIK. Conclusions/Significance The results presented herein demonstrate the potential of MVA to effectively express CHIKV E3-E2 proteins and generate protective immune responses. Our findings challenge the assumption that only neutralizing antibodies are effective in providing protection against CHIKV, and provides a framework for the development of novel, more effective vaccine strategies to combat CHIKV. PMID:25058320

Weger-Lucarelli, James; Chu, Haiyan; Aliota, Matthew T.; Partidos, Charalambos D.; Osorio, Jorge E.

2014-01-01

477

Rapid generation of a mouse model for Middle East respiratory syndrome  

PubMed Central

In this era of continued emergence of zoonotic virus infections, the rapid development of rodent models represents a critical barrier to public health preparedness, including the testing of antivirus therapy and vaccines. The Middle East respiratory syndrome coronavirus (MERS-CoV) was recently identified as the causative agent of a severe pneumonia. Given the ability of coronavirus to rapidly adapt to new hosts, a major public health concern is that MERS-CoV will further adapt to replication in humans, triggering a pandemic. No small-animal model for this infection is currently available, but studies suggest that virus entry factors can confer virus susceptibility. Here, we show that mice were sensitized to MERS-CoV infection by prior transduction with adenoviral vectors expressing the human host-cell receptor dipeptidyl peptidase 4. Mice developed a pneumonia characterized by extensive inflammatory-cell infiltration with virus clearance occurring 6–8 d after infection. Clinical disease and histopathological changes were more severe in the absence of type-I IFN signaling whereas the T-cell response was required for virus clearance. Using these mice, we demonstrated the efficacy of a therapeutic intervention (poly I:C) and a potential vaccine [Venezuelan equine encephalitis replicon particles expressing MERS-CoV spike protein]. We also found little protective cross-reactivity between MERS-CoV and the severe acute respiratory syndrome-CoV. Our results demonstrate that this system will be useful for MERS-CoV studies and for the rapid development of relevant animal models for emerging respiratory viral infections. PMID:24599590

Zhao, Jincun; Li, Kun; Wohlford-Lenane, Christine; Agnihothram, Sudhakar S.; Fett, Craig; Zhao, Jingxian; Gale, Michael J.; Baric, Ralph S.; Enjuanes, Luis; Gallagher, Tom; McCray, Paul B.; Perlman, Stanley

2014-01-01

478

Evolution of microbes and viruses: a paradigm shift in evolutionary biology?  

PubMed Central

When Charles Darwin formulated the central principles of evolutionary biology in the Origin of Species in 1859 and the architects of the Modern Synthesis integrated these principles with population genetics almost a century later, the principal if not the sole objects of evolutionary biology were multicellular eukaryotes, primarily animals and plants. Before the advent of efficient gene sequencing, all attempts to extend evolutionary studies to bacteria have been futile. Sequencing of the rRNA genes in thousands of microbes allowed the construction of the three- domain “ribosomal Tree of Life” that was widely thought to have resolved the evolutionary relationships between the cellular life forms. However, subsequent massive sequencing of numerous, complete microbial genomes revealed novel evolutionary phenomena, the most fundamental of these being: (1) pervasive horizontal gene transfer (HGT), in large part mediated by viruses and plasmids, that shapes the genomes of archaea and bacteria and call for a radical revision (if not abandonment) of the Tree of Life concept, (2) Lamarckian-type inheritance that appears to be critical for antivirus defense and other forms of adaptation in prokaryotes, and (3) evolution of evolvability, i.e., dedicated mechanisms for evolution such as vehicles for HGT and stress-induced mutagenesis systems. In the non-cellular part of the microbial world, phylogenomics and metagenomics of viruses and related selfish genetic elements revealed enormous genetic and molecular diversity and extremely high abundance of viruses that come across as the dominant biological entities on earth. Furthermore, the perennial arms race between viruses and their hosts is one of the defining factors of evolution. Thus, microbial phylogenomics adds new dimensions to the fundamental picture of evolution even as the principle of descent with modification discovered by Darwin and the laws of population genetics remain at the core of evolutionary biology. PMID:22993722

Koonin, Eugene V.; Wolf, Yuri I.

2012-01-01

479

Sialylated glycans as receptor and inhibitor of enterovirus 71 infection to DLD-1 intestinal cells  

PubMed Central

Background Many viruses recognize specific sugar residues, particularly sulfated or sialylated glycans, as the infection receptors. A change of sialic acid (2-6)-linked galactose (SA-?2,6Gal) to SA-?2,3Gal determines the receptor for avian flu infection. The receptor for enterovirus 71 (EV71) infection that frequently causes fatal encephalitis in Asian children remains unclear. Currently, there is no effective vaccine or anti-virus agent for EV71 infection. Using DLD-1 intestinal cells, this study investigated whether SA-linked glycan on DLD-1 intestinal cells was a receptor for EV71, and whether natural SA-linked sugars from human milk could block EV71 infection. Results EV71 specifically infected DLD-1 intestinal cells but not K562 myeloid cells. Depletion of O-linked glycans or glycolipids, but not N-linked glycans, significantly decreased EV71 infection of DLD-1 cells. Pretreatment of DLD-1 cells with sialidase (10 mU, 2 hours) significantly reduced 20-fold EV71 replication (p < 0.01). Taken together, these results suggest that SA-linked O-glycans and glycolipids, but not N-glycans, on DLD-1 cells were responsible for EV71 infection. Purified SA-?2,3Gal and SA-?2,6Gal from human milk significantly inhibited EV71 infection of DLD-1 cells, indicating terminal SA-linked glycans could be receptors and inhibitors of EV71 infection. Conclusion This is the first in the literature to demonstrate that EV71 uses SA-linked glycans as receptors for infection, and natural SA-linked glycans from human milk can protect intestinal cells from EV71 infection. Further studies will test how a SA-containing glycan can prevent EV71 in the future. PMID:19751532

Yang, Betsy; Chuang, Hau; Yang, Kuender D

2009-01-01

480

Access Control of Web- and Java-Based Applications  

NASA Technical Reports Server (NTRS)

Cybersecurity has become a great concern as threats of service interruption, unauthorized access, stealing and altering of information, and spreading of viruses have become more prevalent and serious. Application layer access control of applications is a critical component in the overall security solution that also includes encryption, firewalls, virtual private networks, antivirus, and intrusion detection. An access control solution, based on an open-source access manager augmented with custom software components, was developed to provide protection to both Web-based and Javabased client and server applications. The DISA Security Service (DISA-SS) provides common access control capabilities for AMMOS software applications through a set of application programming interfaces (APIs) and network- accessible security services for authentication, single sign-on, authorization checking, and authorization policy management. The OpenAM access management technology designed for Web applications can be extended to meet the needs of Java thick clients and stand alone servers that are commonly used in the JPL AMMOS environment. The DISA-SS reusable components have greatly reduced the effort for each AMMOS subsystem to develop its own access control strategy. The novelty of this work is that it leverages an open-source access management product that was designed for Webbased applications to provide access control for Java thick clients and Java standalone servers. Thick clients and standalone servers are still commonly used in businesses and government, especially for applications that require rich graphical user interfaces and high-performance visualization that cannot be met by thin clients running on Web browsers

Tso, Kam S.; Pajevski, Michael J.

2013-01-01

481

Integration of Transcriptome, Proteome and Metabolism Data Reveals the Alkaloids Biosynthesis in Macleaya cordata and Macleaya microcarpa  

PubMed Central

Background The Macleaya spp., including Macleaya cordata and Macleaya microcarpa, are traditional anti-virus, inflammation eliminating, and insecticide herb medicines for their isoquinoline alkaloids. They are also known as the basis of the popular natural animal food addictive in Europe. However, few studies especially at genomics level were conducted on them. Hence, we performed the Macleaya spp. transcriptome and integrated it with iTRAQ proteome analysis in order to identify potential genes involved in alkaloids biosynthesis. Methodology and Principal Findings We elaborately designed the transcriptome, proteome and metabolism profiling for 10 samples of both species to explore their alkaloids biosynthesis. From the transcriptome data, we obtained 69367 and 78255 unigenes for M. cordata and M. microcarpa, in which about two thirds of them were similar to sequences in public databases. By metabolism profiling, reverse patterns for alkaloids sanguinarine, chelerythrine, protopine, and allocryptopine were observed in different organs of two species. We characterized the expressions of enzymes in alkaloid biosynthesis pathways. We also identified more than 1000 proteins from iTRAQ proteome data. Our results strongly suggest that the root maybe the organ for major alkaloids biosynthesis of Macleaya spp. Except for biosynthesis, the alkaloids storage and transport were also important for their accumulation. The ultrastructure of laticifers by SEM helps us to prove the alkaloids maybe accumulated in the mature roots. Conclusions/Significance To our knowledge this is the first study to elucidate the genetic makeup of Macleaya spp. This work provides clues to the identification of the potential modulate genes involved in alkaloids biosynthesis in Macleaya spp., and sheds light on researches for non-model medicinal plants by integrating different high-throughput technologies. PMID:23326424

Liu, Fuqing; Huang, Peng; Zhu, Pengcheng; Chen, Jinjun; Shi, Mingming; Guo, Fang; Cheng, Pi; Zeng, Jing; Liao, Yifang; Gong, Jing; Zhang, Hong-Mei; Wang, Depeng; Guo, An-Yuan; Xiong, Xingyao

2013-01-01

482

Can’t RIDD off viruses  

PubMed Central

The mammalian genome has evolved to encode a battery of mechanisms, to mitigate a progression in the life cycle of an invasive viral pathogen. Although apparently disadvantaged by their dependence on the host biosynthetic processes, an immensely faster rate of evolution provides viruses with an edge in this conflict. In this review, I have discussed the potential anti-virus activity of inositol-requiring enzyme 1 (IRE1), a well characterized effector of the cellular homeostatic response to an overloading of the endoplasmic reticulum (ER) protein-folding capacity. IRE1, an ER-membrane-resident ribonuclease (RNase), upon activation catalyses regulated cleavage of select protein-coding and non-coding host RNAs, using an RNase domain which is homologous to that of the known anti-viral effector RNaseL. The latter operates as part of the Oligoadenylate synthetase OAS/RNaseL system of anti-viral defense mechanism. Protein-coding RNA substrates are differentially treated by the IRE1 RNase to either augment, through cytoplasmic splicing of an intron in the Xbp1 transcript, or suppress gene expression. This referred suppression of gene expression is mediated through degradative cleavage of a select cohort of cellular RNA transcripts, initiating the regulated IRE1-dependent decay (RIDD) pathway. The review first discusses the anti-viral mechanism of the OAS/RNaseL system and evasion tactics employed by different viruses. This is followed by a review of the RIDD pathway and its potential effect on the stability of viral RNAs. I conclude with a comparison of the enzymatic activity of the two RNases followed by deliberations on the physiological consequences of their activation. PMID:24995003

Bhattacharyya, Sankar

2014-01-01

483

Physicochemical characterization of silver nanoparticles synthesize using Aloe Vera (Aloe barbadensis)  

NASA Astrophysics Data System (ADS)

Production of silver nanoparticles (AgNPs) using different biological methods is gaining recognition due to their multiple applications. Although, several physical and chemical methods have been used for the synthesis and stabilizing of AgNPs, yet, a green chemistry method is preferable because it is cost effective and environmentally friendly. The synthesis was done using Aloe Vera (AV) extract because it has chemical compounds such as "Antrokinon" that are known for its antibacterial, antivirus and anticancer properties. We hypothesize that AV extract can produce a stable nanoparticles within the 100 nm range and be biologically active. The biological compounds were extracted from AV skin with water and ethanol which was used as the reduction agent for the synthesis of nanoparticles. The biological extract and AgNO3 were blended and heated to synthesize AgNPs. The reaction process was monitored using UV-Visible spectroscopy. Fourier Transfer Infrared spectroscopy (FTIR) was used for the characterization of biological compounds and their substituent groups before and after the reaction process. Dynamic Light scattering (DLS) method was used to characterize particle size of AgNPs and their biomolecular stability. Results showed that biological compounds such as aliphatic amines, alkenes (=C-H), alkanes (C-H), alcohol (O-H) and unsaturated esters(C-O), which has an average particle size of 109 and 215.8 nm and polydispersity index of 0.451 and 0.375 for ethanol and water extract, respectively. According to TEM measurements the size of AgNPs are in the range 5-20 nm The results suggested that ethanol derived AgNPs contained higher yield of organic compounds, thus has better solubility power than water. Ag NPs can be used to control salmonella in poultry industry.

Kuponiyi, Abiola; Kassama, Lamin; Kukhtareva, Tatiana

2014-08-01

484

5 October 1998 Physics Letters A 247 (1998) 1611166  

E-print Network

Niurka R. Quintero 1 , Angel S´anchez 2 Grupo Interdisciplinar de Sistemas Complicados, Departamento de.R. Quintero, A. S´anchez / Physics Letters A 247 (1998) 1611166 gle soliton. We note that the influence

Sánchez, Angel "Anxo"

485

SECCIN DE COMUNICACIONES Personal acadmico y temas de investigacin  

E-print Network

) Cinvestav. Temas de investigación: Redes de computadoras, interconexión de redes y protocolos para. Sistema funcional de redes de telecomuni- caciones. Metodologías modernas de educación a base de

486

Oferta de Proyectos Fin de Carrera Ingeniera de Telecomunicacin Escuela Politcnica Superior  

E-print Network

.......................................................... 1 1.2. Planificación de Redes Malladas...................................................................................... 7 2. Grupo de Redes.3. Desarrollo de Sistemas de Gestión Autónoma de Redes y Servicios Basados en Razonamientos con Lenguajes de

Autonoma de Madrid, Universidad

487

Paralelismo Organizacion de la asignatura  

E-print Network

Fundamentos de la programaci´on paralela. V´alido para: Sistemas: Port´atiles, PC: duales, quad, hexa...; Redes o clusters de ordenadores; Supercomputadores: Marenostrum, Ben-Arab´i... Problemas: de alto coste

Giménez, Domingo

488

Transtorno de pânico e tabagismo Panic disorder and smoking  

Microsoft Academic Search

A relação entre transtorno de pânico e tabagismo é tema de interesse clínico. A associação entre transtorno de pânico e tabagismo foi revisada pelo sistema Medline (1980 a 2001), utilizando as seguintes palavras-chave: \\

Alexandre M Valença; Antonio Egidio Nardi; Isabella Nascimento; Marco A Mezzasalma; Fabiana L Lopes; Walter Zin

489

Measuring, monitoring, and assessing software process using PAMPA 2.0 knowledge-based system  

E-print Network

traceability tool. Replaces RTM IRqA TCP Sistemas e Ingenieria Integral Requisite Analyzer. A requirements management tool, but also a requirements analysis environment, that includes facilities to support problem domain modeling and automatic domain...

Jung, Jin Hwan

2005-08-29

490

Relativna kronologija naglasnih pojavov govora Žirovske kotline poljanskega nare?ja  

E-print Network

SLV: Govor Žirovske kotline poljanskega nare?ja izkazuje v svojem naglasnem sistemu mnoge posebnosti s strukturnega in razvojnega vidika. Na podlagi opisa sistema v Stanonik (1977) izluš?im naglasne spremembe od splošnoslovenskega stanja do danes...

Beguš, Gašper

2011-01-01

491

On-Site Wastewater Treatment Systems: Spray Distribution (Spanish)  

E-print Network

Producido por AgriLife Communications and Marketing, El Sistema Universitario Texas A&M Las publicaciones de Texas AgriLife Extension se pueden encontrar en Internet en: http://AgriLifebookstore.org Los programas educativos de Texas Agri...

Lesikar, Bruce J.; Enciso, Juan

1999-08-12

492

On-Site Wastewater Treatment Systems: Subsurface Drip Distribution (Spanish)  

E-print Network

Producido por AgriLife Communications and Marketing, El Sistema Universitario Texas A&M Las publicaciones de Texas AgriLife Extension se pueden encontrar en Internet en: http://AgriLifebookstore.org Los programas educativos de Texas Agri...

Lesikar, Bruce J.; Enciso, Juan

1999-08-12

493

On-Site Wastewater Treatment Systems: Low-Pressure Dosing System (Spanish)  

E-print Network

Producido por AgriLife Communications and Marketing, El Sistema Universitario Texas A&M Las publicaciones de Texas AgriLife Extension se pueden encontrar en Internet en: http://AgriLifebookstore.org Los programas educativos de Texas Agri...

Lesikar, Bruce J.

1999-08-12

494

Base Lunar Alpha - Duration: 0:30.  

NASA Video Gallery

Tu misión: Recuperar los sistemas críticos cuando un meteoro daña los equipos de supervivencia de tu ambiente lunar. Parece una película de ciencia ficción, ¿verdad? En realidad, es el nuevo juego ...

495

UNIVERSIT DEGLI STUDI DI PADOVA Ufficio Stampa  

E-print Network

Padova dell'Istituto Nazionale di Astrofisica e del Dipartimento di Fisica e Astronomia "Galileo Galilei due satelliti è rappresentato dal sistema di telescopi, progettato a Padova, la città dove Galileo 400

Cesare, Bernardo

496

Nome e Cognome:......................................................... Matricola:................ Compito di Teoria dei Sistemi  

E-print Network

:................ Compito di Teoria dei Sistemi Gruppo A-L 25 Ottobre 2003 1) Si consideri il sistema a tempo continuo _x:......................................................... Matricola:................ Compito di Teoria dei Sistemi Gruppo A-L 25 Ottobre 2003 1) Si consideri il

Monaco, Salvatore

497

UNIVERSIDAD AUTONOMA DE MADRID ESCUELA POLITECNICA SUPERIOR  

E-print Network

70 con el desarrollo del sistema militar estadounidense GPS (Global Positioning System), destinado al with the development of the militar system GPS (Global Positioning System), aimed to missile guidance, targets

Autonoma de Madrid, Universidad

498

Actas del Congreso Internacional "Amrica Latina: La autonoma de una regin", organizado por el Consejo Espaol de Estudios Iberoamericanos (CEEIB) y la Facultad de Ciencias Polticas y Sociologa de la Universidad Complutense de Madrid (UCM),  

E-print Network

ascenso en las encuestas fue atribuido al internet y en particular al uso de redes sociales, las cuales se Manizales. Se trata de una investigación enmarcada en el planteamiento de los sistemas sociales de Niklas

Paris-Sud XI, Université de

499

Duomen? perdavimas tarp ActionScript ir MySQL formuojant animacinius objektus.  

E-print Network

??Magistrinio darbo metu buvo realizuojama animuot? žaidim? derini? informacin? sistema. Taipogi buvo analizuojamos duomen? perdavimo galimybes tarp ActionScript (animacijos programavimo kalbos) ir MySQL (duomen? baz?s).… (more)

Šeškevi?ius,; Laimis

2009-01-01

500

On-Site Wastewater Treatment Systems: Evapotranspiration Bed (Spanish)  

E-print Network

Fosa s?ptica de dos compartimentos Suelo arcilloso Piedra quebrada Cama de evapotranspiraci?n Mecha de absorci?n Sistemas individuales para el tratamiento de aguas negras Cama de evapotranspiraci?n Bruce Lesikar y Juan Enciso Promotores...

Lesikar, Bruce J.; Enciso, Juan

2002-04-18