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SAFE: A Declarative Trust-Agile System with Linked CredentialsThummala, Vamsidhar January 2016 (has links)
<p>Secure Access For Everyone (SAFE), is an integrated system for managing trust</p><p>using a logic-based declarative language. Logical trust systems authorize each</p><p>request by constructing a proof from a context---a set of authenticated logic</p><p>statements representing credentials and policies issued by various principals</p><p>in a networked system. A key barrier to practical use of logical trust systems</p><p>is the problem of managing proof contexts: identifying, validating, and</p><p>assembling the credentials and policies that are relevant to each trust</p><p>decision. </p><p>SAFE addresses this challenge by (i) proposing a distributed authenticated data</p><p>repository for storing the credentials and policies; (ii) introducing a</p><p>programmable credential discovery and assembly layer that generates the</p><p>appropriate tailored context for a given request. The authenticated data</p><p>repository is built upon a scalable key-value store with its contents named by</p><p>secure identifiers and certified by the issuing principal. The SAFE language</p><p>provides scripting primitives to generate and organize logic sets representing</p><p>credentials and policies, materialize the logic sets as certificates, and link</p><p>them to reflect delegation patterns in the application. The authorizer fetches</p><p>the logic sets on demand, then validates and caches them locally for further</p><p>use. Upon each request, the authorizer constructs the tailored proof context</p><p>and provides it to the SAFE inference for certified validation.</p><p>Delegation-driven credential linking with certified data distribution provides</p><p>flexible and dynamic policy control enabling security and trust infrastructure</p><p>to be agile, while addressing the perennial problems related to today's</p><p>certificate infrastructure: automated credential discovery, scalable</p><p>revocation, and issuing credentials without relying on centralized authority.</p><p>We envision SAFE as a new foundation for building secure network systems. We</p><p>used SAFE to build secure services based on case studies drawn from practice:</p><p>(i) a secure name service resolver similar to DNS that resolves a name across</p><p>multi-domain federated systems; (ii) a secure proxy shim to delegate access</p><p>control decisions in a key-value store; (iii) an authorization module for a</p><p>networked infrastructure-as-a-service system with a federated trust structure</p><p>(NSF GENI initiative); and (iv) a secure cooperative data analytics service</p><p>that adheres to individual secrecy constraints while disclosing the data. We</p><p>present empirical evaluation based on these case studies and demonstrate that</p><p>SAFE supports a wide range of applications with low overhead.</p> / Dissertation
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Training Condom Use Skills for Sexually Active College StudentsSmith, Teresa E. (Teresa Elizabeth) 12 1900 (has links)
Eighty-nine single, sexually active, heterosexual college students (ages 17-24) participated in one of two intervention conditions. Experimental groups were taught
skills specific to condom use and sexual communication via a multimedia presentation. Control groups viewed a video on an unrelated topic. Individuals in the experimental conditions were expected to show higher levels of self-efficacy, greater knowledge concerning diseases, and improved attitudes about condoms immediately following the
intervention. They were also expected to report safer sexual practices at the one month follow-up. Findings reveal that improved attitude and knowledge scores did not
translate into behavioral changes.
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Associations entre port du casque, comportements sécuritaires à vélo et habitudes de vieChampagne, Geneviève 04 1900 (has links)
Introduction : La promotion du port du casque à vélo exige une bonne connaissance des déterminants du port du casque. Objectifs : Estimer l’association entre les caractéristiques sociodémographiques et le port du casque à vélo dans la population des cyclistes de Montréal et examiner les associations entre le port du casque et les comportements sécuritaires à vélo ainsi que les habitudes de vie. Méthode : Le devis est transversal à mesures répétées, via trois sondages téléphoniques complétés entre 2009 et 2010. L’échantillon analysé comprend 3309 Montréalais de 18 ans et plus ayant fait du vélo au cours des douze derniers mois. Des informations sur le port du casque, les caractéristiques sociodémographiques, les autres comportements sécuritaires à vélo, les habitudes de vie et l’environnement routier ont été recueillies. Des analyses de régression logistique, bivariées et multivariées, ont été réalisées. Résultats : Le port du casque est significativement associé à un revenu et un niveau d’éducation plus élevés, au lieu de naissance (Canada vs hors Canada), à d’autres comportements sécuritaires à vélo, à certaines habitudes de vie (non-fumeur, boire une ou deux consommations alcoolisées quotidiennement vs ne pas boire, ou boire trois consommations ou plus quotidiennement) et à l’absence d’une station de vélo en libre-service proche du lieu de résidence. Conclusion : Le port du casque s’inscrit dans l’ensemble des comportements permettant aux cyclistes de se protéger. La présence d’inégalités sociales devrait être prise en compte dans les interventions de promotion du port du casque. / Background: Cyclists are vulnerable road users. Helmet use may reduce injury severity. Yet, its promotion requires a good knowledge of the determinants related to helmet use.
Objectives: The objectives are to estimate the association between sociodemographic characteristics and helmet use among cyclists’ from Montreal and to examine associations between helmet use and safe cycling behaviours as well as lifestyles behaviour.
Methods: We used a cross sectional design with repeated measures through three telephone surveys completed in 2009 and 2010. The sample includes 3309 Montrealers aged 18 years and over, who had cycled in the previous 12 months. Information on sociodemographic characteristics, safe cycling behaviours, lifestyles and road environments were collected. Bivariate and multivariate logistic regression analyses were conducted.
Results: Results show associations between wearing a helmet and income, higher level of education, being born in Canada, other safe cycling behaviours, some lifestyles (non-smoking and drinking one or two alcoholic beverages daily vs not drinking, or drinking three alcoholic beverages or more daily) and the absence of public bicycle share docking stations near one’s dwelling.
Conclusions: Helmet use is one of the behaviours allowing cyclists to protect themselves. Social inequalities should be considered when developing interventions to promote helmet use among cyclists.
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Odpovědnost poskytovatelů služeb informační společnosti za porušování autorských práv na internetu / Liability of internet servis providers for copyright infringement on the internetMlynář, Vojtěch January 2014 (has links)
This paper discusses the history and recent developments pertaining to ISPs' liability for copyright infringement in the European Union. Section I. explains ISPs' basic roles on the Internet, discusses practical grounds justifying a special liability regime for ISPs and outlines the EU legal framework providing safe harbor provisions for ISPs' liability and transposition of these rules into the legal system of the Czech Republic. Section II. describes how judicial decisions in the EU Member States eroded safe harbor rules and how these decisions were subsequently overturned by the Court of Justice of the European Union (CJ). The section continues with an examination of the latest judgment of the CJ in UPC Telekabel Wien concerning new rules (or lack thereof) for website-blocking injunctions. Section III. discusses notable examples of EU Member states' legislation or legislative proposals which aimed to put a stop to "online piracy" and copyright infringement. Considerable part of this section analyzes the recent controversial system set up by the Italian communications regulator AGCOM. Section IV. describes examples of increasing voluntary collaboration between ISPs and content owners, which has the potential to effectively combat online piracy and benefit all parties involved. Section V. explores...
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Internetové právo / Internet lawMeissnerová, Anna January 2013 (has links)
! 69! Internet Law - Master Thesis Abstract This study explores and describes the discipline of Internet Law as well as the problems arising from applying its jurisdiction. Furthermore, it deals with liability limitation in the on-line world and presents various tendencies in the development of the Internet Copyright Law in the Czech Republic, USA and France. This study is divided into two main chapters. The first one deals with the theoretical and philosophical foundations of the Internet phenomenon and the second focuses on practical aspects of the on-line legal regulation. The tendencies in interpretation and application of the legislature are presented through important case studies. The research strategy for this thesis was data gathering followed by its analysis. Providing examples of local legislature (Czech, USA, French) together with presentation of corresponding case studies I was searching for the keys for interpretation and application strategies of this relatively young and dynamically developing field of law. The study's objective was to find answers to the following two questions: a) Is there a general need for the Internet legal regulation? And if so b) What should the legislative tendency within the Internet Copyright Law be? During the writing process I had to confront two opposite...
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Maritime shipping container security and the Defense Transportation System: problems and policy in the 21st centuryJankowski, William M. 06 1900 (has links)
Approved for public release, distribution is unlimited / The Defense Transportation System (DTS), led by the Military Traffic Management Command (MTMC), depends on the commercial maritime industry to provide movement of supplies and equipment around the world. The maritime shipping container is a critical asset in providing for this logistical support to the war fighter abroad. These 20- or 40-foot containers have become the backbone of the maritime industry, and will continue to proliferate as global commerce continues to expand. While the growth in the use of maritime shipping containers in the 21st century has accelerated the nation's economic trade substantially, it may also have become a significant problem. Containers are an indispensable but vulnerable link in the chain of global trade; approximately 90 percent of the world's cargo moves by container. Because of DoD's dependency on the maritime industry and these containers, it will and must continue to ride the wave of commercial practices, specifically in pursuit of better security throughout the maritime industry. In the wake of September 11, 2001, and with the new threats of WMD, the maritime shipping container may become a weapons delivery system. This thesis documented the need for security improvements for the maritime shipping container in protecting global commerce and DoD cargo shipments. Comprehensive reviews of government reports, books, articles, and Internet based materials, as well as interviews with MTMC personnel, have indicated that DoD is taking a series of measures to meet these challenges. DoD's Defense Transportation System and the commercial maritime industry will be challenged and tested by new policy requirements. MTMC has already adopted new business processes, cargo manifest requirements, and technological innovations that assure customers in-transit visibility and total asset visibility (ITV/TAV), including the Intelligent Road-Rail Information Server (IRRIS) system. / Lieutenant Commander, United States Navy
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Food safety practices in childcare centers in KansasFan, Shengjie January 1900 (has links)
Master of Science / Department of Hospitality Management and Dietetics / Kevin R. Roberts / The Centers for Disease Control and Prevention estimated that one in six Americans become ill,128,000 are hospitalized, and 3,000 die each year due to foodborne illness. Children are at a higher risk of acquiring foodborne illness than adults for several reasons, including: an immune system that has yet to fully develop, limiting their ability to fight infections; a lack of control over the food they consume because their meals are usually provided by others; and the lack of awareness of food safety risks. Thus, it is critical to ensure that childcare center employees practice safe food handling. The purpose of this study was to explore the food safety knowledge, practices, and barriers to safe food handling practices of childcare center employees. Observations were conducted in 10 childcare centers in Manhattan, Kansas. Each childcare center was observed for two days during lunch preparation and service. Observations of foodservice employees were conducted in the kitchen using a structured observation form. Teacher observations were conducted in the classroom using detailed notes. A questionnaire was used to collect demographic, food safety training, and food safety knowledge information. SPSS (v. 20.0) was used to analyze data. Childcare center employees had high average scores on the safety knowledge assessment. The majority of employees received some type of food safety training. Time pressures, availability of equipment, and small food preparation space were found as the main barriers to implementing safe food handling. Childcare center foodservice workers and teachers were knowledgeable about handwashing and time/temperature control, but failed to utilize on the job. Results of this study will help childcare educators to develop materials to improve food safety practices and encourage owners/managers of childcare centers to enhance their food safety behaviors.
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Systèmes laser pompés par diode à fibres cristallines : oscillateurs Er : yAG, amplificateurs Nd : yAG / Diode pumped laser systems with single crystal fibers : er : yAG oscillators, Nd : yAG amplifiersMartial, Igor 12 December 2011 (has links)
Au cours de cette thèse, nous nous intéressons à deux applications nécessitant des sources laser impulsionnelles : l'imagerie active et l'usinage laser. L'imagerie active nécessite des sources laser efficaces émettant dans la gamme de sécurité oculaire (entre 1,5 µm et 1,7 µm) à des cadence de l'ordre du kilohertz et produisant des énergies par impulsion de plusieurs millijoules. Les sources efficaces émettant dans la gamme de sécurité oculaire utilisent l'ion erbium. Cependant la structure électronique complexe de l'ion erbium entraîne de nombreux effets parasites qui limitent fortement l'énergie accessible lors d'un fonctionnement à haute cadence. Pour diminuer l'influence de ces effets parasites nous avons utilisé le concept de fibres cristallines dans le cadre d'une collaboration entre le Laboratoire Charles Fabry et l'entreprise Fibercryst. La géométrie des fibres cristallines, combinant les propriétés des cristaux massifs et les avantages des fibres en verre nous a permis de dépasser les limites des sources actuelles. L'usinage de matériaux requière des sources laser impulsionnelles émettant dans le proche infrarouge (1 µm) et alliant forte énergie, forte puissance crête et forte puissance moyenne. Pour réaliser de telles sources, il est nécessaire d'utiliser des milieux à gain permettant de limiter les phénomènes thermiques et les effets induit par la puissance crête (effets non-linéaires). Pour cela nous avons utilisé à nouveau le concept de fibre cristalline, dopée cette fois ci par l'ion néodyme. Ces fibres cristallines ont été utilisées comme amplificateur de puissance pour amplifier des micro-lasers fonctionnant à haute cadence (de 1 à 100 kHz) et produisant des impulsions courtes (< 1 ns). / In this thesis we investigate two different pulsed laser sources for two specific applications : remote sensing and material processing. On the first part, remote sensing require efficient laser source emitting in the eye-safe range (1.5 – 1.7 µm) and producing several millijoules per pulse at a few kilohertz. Efficient eye-safe laser sources use erbium doped gain media. Nevertheless, the complex electronic structure of the erbium ion leads to several parasitic effects which limit the energy at high repetition rate. In order to minimize those effects we have used the concept of single crystal fibers developed in a close collaboration between the Laboratoire Charles Fabry and the company Fibercryst. The specific geometry of single crystal fibers, merging the advantages of bulk crystals and optical fibers, allows us to overcome limits of current laser sources. On the other part, material processing require near-infrared pulsed laser sources (1 µm) with high pulse energy, high average power and high peak power. In such laser sources, the amplifying medium must be design to avoid both thermal effects and non liner effects. For this purpose, we used neodymium doped single crystal fibers as power amplifier to enhance the performance of passively q-switched microlasers operating at high repetition rate (1 to 100 kHz) and emitting short pulses (< 1 ns).
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Stå upp(rätt) för en tryggare förlossning : Design för uppmaning till rörelsefrihet i modern förlossningsvård. / Stand up(right) for a Safer ChildbirthBjörklund, Malin January 2019 (has links)
“Förlossningsvården behöver i ännu större utsträckning än idag även bestå av känslomässigt stöd och trygghetsskapande omvårdnad.” Citatet ovan finns i boken Trygg förlossning (2017) och är vägledande i mitt examensarbete. Idag är det säkert att föda i Sverige och mödra- och barnadödligheten är bland den lägsta i världen. Trots detta lider många av förlossningsrädsla. Studier, bland annat från Socialstyrelsen, visar att platt ryggläge är den förlossningsställning som är mest ofördelaktig, för både föderska och barn. När föderskan rör på sig och om hen dessutom har en upprätt förlossningsställning kan den upplevda smärtan minska, eftersom utsöndringen av endorfiner ökar. Trots detta har de flesta en liggande ställning under förlossningen. Det finns uppenbarligen glapp mellan den medicinska kunskapen och förlossningspraktiken. Därför undersökte jag befintliga hjälpmedel och produkter inom förlossningsvården, som dessutom inte är utvecklade för ett förlossningsarbete, utan inlån från andra sjukvårdsavdelningar. Jag har utvecklat ett designförslag som ska uppmana till upprätta förlossningsställningar för en tryggare förlossning. / “Maternity care needs to be comprised of emotional support and reassuring nursing practices, even more so than it does today.” This quotation, from the book Trygg förlossning (2017), has been a big influence in my degree project. Today, it is regarded as safe to give birth in Sweden with maternal and child mortality being amongst the lowest in the world. Despite this, many suffer from a fear of childbirth. Studies from Socialstyrelsen, amongst others, show that a back-lying position during childbirth is disadvantageous for the mother and child. If the mother moves and has an upright position, the perceived pain may decrease as the release of endorphins increases. Despite this, most people continue use a back-lying position during childbirth. There is obviously a gap between medical knowledge and childbirth practice. Therefore, I have investigated existing aids in maternity care, many of which are not developed for childbirth, but borrowed from other healthcare departments. I have developed a design proposal that will encourage an upright childbirth position for a safer delivery.
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Remaking selves and remaking public space : combating sexual harassment in Cairo post 2011Fernandez, Sandra January 2018 (has links)
This thesis focuses on the work of a social movement based in Cairo that dedicated itself to the addressing and reducing sexual harassment, or taḥarush in the streets. Based on a year and five months of fieldwork, this thesis elaborated upon the genesis of the movement, its ethos, and the methods it deployed to tackle taḥarush. It is argued that the movement deployed methods which encouraged members of Egyptian society to revisit and rework their ethical standpoints with reference to taḥarush, and as such public behaviour. In this way, members of Egyptian society were asked to become more aware of their roles within society itself. Firstly, such methods had to be tested by movement members themselves. The movement became known for two main activities: raising awareness and patrols. Both methods serve as ways by which the movement reshaped both people and the public spaces they occupied. Spaces are defined by the people who pass through them, and by acting on a given space, people can change how it is perceived. The movement designated itself a safe space, encouraging members to ponder ideas from society with the goal of changing society ‘for the better'. What my research revealed was that lack of consensus regarding definitions embedded in movement ethos contributed to conflict between members and discontinuity between ethos and its enactment. Government pressures required changes to the structure and internal functioning of the movement, and in addition to the initial ethical project regarding taḥarush, members found themselves learning to embody and perform roles associated with employed positions. The turmoil experienced both within in and outside of the movement is put back into the context of Egypt post 2011, to tease out the sense of temporality embedded in their struggle to survive the political climate of the time.
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