65,350 research outputs found
An Application of Multimedia Services on Transportation: The Use of the World Wide Web (WWW)
INTRODUCTION
In recent years, there is an ever-increasing demand and interest in the use of multimedia
technology and applications in industry, government and academia. Multimedia is often
seen by researchers as the next step forward in interfacing science, technology and
community. Yet, the terminology of multimedia bears several meanings. It may refer to
Compact Disc (CD), moving pictures or video-conferencing. The multimedia technology
referred in this paper is the World Wide Web (WWW) hypertext publishing information
system which was developed by and started at the European Laboratory for Particle
Physics (CERN) in Geneva, Switzerland. Since the introduction of WWW, its use has
increased dramatically within a couple of years in a widely diverse community including
government departments, university and research establishments, and commercial
organisations. It has significant influence to our communities and our daily lives. Yet, in
most cases, applications of WWW services are largely restricted to electronic library
referencelcatalogue search facilities, electronic mail systems, electronic conference and
discussion systems, electronic news and publishing agents, and remote access to computing
resources on the Internet.
The primary objective of this paper is to exploit the potential of this multimedia technology
as a simple, easy-to-use and effective means of telematics application in transportation
research. It is hoped that initiatives are highlighted via this study and hence encourage
participations and collaborations from different sectors of industries.
In this paper, a brief history of WWW is given in section (2). An overview of the technical
aspects in providing a WWW service is presented in section (3) in terms of computer
hardware requirements, software installation, network connections, application
maintenance and administration, and system security. Compared to most commercially
available multimedia software in the market, WWW services are cheap to run, userfriendly
and readily available to the public on the Internet. In order to exploit the potential
of WWW on transportation research, a study was carried out and results of the findings are
reported in section (4). To further substantiate the level of usefulness, two particular
WWW applications were chosen amongst other web services and they are reported in
section (5) for illustrative purposes. The selected applications are the 'Transportation
Resources on the Internet' developed in mid-1994 in the Institute for Transport Studies
(ITS) at the University of Leeds in England, and the 'Southern California Real-Time
Traffic Report' developed by Maxwell Laboratories, Inc. in collaboration with the
California State Department of Transportation in the US. Finally, a set of issues are raised
in section (6), highlighting the directions of future development of WWW as an easy-touse,
cheap and effective multimedia telematics application on transportation
No hay diferencias en la diversidad genética entre arbustos de Cotoneaster franchetii (Rosaceae) de rangos nativos y no nativos
La diversidad genética de los arbustos de Cotoneaster franchetii es similar entre los rangos de distribución nativo y no nativo. Debido al efecto fundador comúnmente se asume que las plantas tienen mayor diversidad genética en su rango nativo que en las áreas donde fueron introducidos. Sin embargo, pocos estudios han probado este supuesto incluyendo
la comparación entre los rangos nativos y no nativos. Nosotros analizamos marcadores de AFLP en 149 individuos de Cotoneaster franchetii pertenecientes a cinco poblaciones nativas (China) y cinco no nativas (Argentina) donde este arbusto invade exitosamente diferentes ambientes, y forma rodales extensos y monoespecíficos. Además comparamos los estimadores de diversidad genética y evaluamos la diferenciación genética entre las poblaciones examinando los valores de Fst y realizando un ACoP, un AMOVA y una prueba de Mantel. No se encontró evidencia de diversidad genética reducida en las poblaciones no nativas, mientras que el ACoP reveló dos grupos distintos, reflejando sus orígenes argentinos y chinos. Diez individuos de dos de las poblaciones chinas fueron la excepción, debido a que se agruparon dentro de las poblaciones argentinas, apoyando la idea de introducciones múltiples desde China hacia Argentina.It is commonly assumed that plants have more genetic diversity in their native range than in areas where they have been introduced due to founder effects. However, few studies have proven this assumption and included the comparison between non-native and native ranges. We analyzed AFLP fingerprint patterns of 149 individuals from five native (China) and five non-native (Argentina) populations of Cotoneaster franchetii, a shrub which successfully invades different habitats and forms extensive
monospecific stands. We compared genetic diversity estimates and assessed genetic differentiation among populations by inspecting FST values and conducting a PCoA, an AMOVA and a Mantel test. No evidence was found for reduced genetic diversity in non-native populations while the PCoA revealed two distinct groups, reflecting their Chinese and Argentine origin. The exceptions were ten individuals from two Chinese populations that clustered within the Argentine populations, supporting the idea of multiple introductions from China to Argentina.Fil: Lett, Irene. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Centro de Ecología y Recursos Naturales Renovables; ArgentinaFil: Hensen, Isabell. Martin Luther University Halle-Wittenberg, Institute of Biology/Geobotany and Botanical Garden; Alemania. German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig; AlemaniaFil: Hirsh, Heidi. Martin Luther University Halle-Wittenberg, Institute of Biology/Geobotany and Botanical Garden; Alemania. Stellenbosch University, Centre for Invasion Biology, Department of Botany and Zoology; SudáfricaFil: Renison, Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; Argentin
Finite-thrust transfer in the two and three body problems Final report
Computer program for optimal finite thrust transfer between two orbit
Reevaluating the Computer Fraud and Abuse Act: Amending the Statute to Explicitly Address the Cloud
Under the current interpretations of authorization, instances where an individual harmlessly accesses the cloud data of another user could be classified as hacking and a violation of this federal statute. As such, this Note demonstrates that all of the current interpretations of the CFAA are too broad because they could result in this nonsensical outcome. This Note accordingly proposes an amendment to the CFAA specifically addressing user access to data on the cloud. Such an amendment would eliminate the unusual result of innocuous cloud-computing users being deemed hackers under federal law
- …