Denna studie är en integrativ forskningsöversikt med syfte att kartlägga vilka psykiska hälsorisker som finns för ungdomar på internet och i sådana fall vilka dessa risker är, samt vilka förklaringar till fenomenet som forskarna lyfter fram. Vilka psykiska hälsorisker är enligt befintlig forskning de mest vanligt förekommande bland ungdomar som använder internet för olika ändamål? Vilka är konsekvenserna som presenteras som följd av dessa hälsorisker? Vad säger forskningen om riskgrupper bland ungdomar gällande internet? Vilka förklaringar presenterar befintlig forskning gällande de olika hälsoriskerna? Genom lämpliga sökord och välkända databaser har studier valts ut för att kunna besvara valda syfte och frågeställningar. I forskningsöversikten valdes 17 studier ut som ansågs relevanta för valt område. Resultatet visar att ungdomar riskerar att utsättas för flertalet faror på nätet men att detta inte är ett kausalt samband. Internet medför många fördelar men samtidigt finns det nackdelar och vissa ungdomar befinner sig i riskgruppen för att utsättas på internet. Det råder oenighet på området gällande om det är internet som är den utlösande faktorn för ungdomars dåliga mående eller om det är ungdomens eget mående som gör att denna utsätts för risker på internet. Forskningsresultaten i denna översikt kan inte ses som generaliserbara men kan dock ge en samlad bild av den nuvarande forskningen på området gällande risker som ungdomar kan utsättas för på internet.

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Magíster en artes, mención artes visuales / El siguiente trabajo corresponde a una memoria de obra. En cuanto tal, pretende dar cuenta y esquematizar las reflexiones asociadas a mi propuesta artística. Las obras que activan estas reflexiones refieren –todas ellas- a la red de Internet. La estructura del texto está asociada a subconjuntos de trabajos que se han comprendido como series, insistencias o núcleos de investigación. Esas series o núcleos de insistencia no han sido ordenados necesariamente desde una secuencialidad cronológica. Al contrario, he preferido configurar un recorrido que va desde algunas experiencias más vinculadas al ciberactivismo, pasando por experiencias y obras objetuales o instalativas asociadas al uso de soportes físicos, hasta llegar a trabajos que son parte de proyectos más amplios, como es el caso de las serie Queer code y de las Pinturas de Interfaz. Además, este trabajo se encuentra atravesado por la pregunta acerca del carácter crítico de las obras, cuestión que se manifiesta en el cruce con espacios de intervención político-social como la CUDS, Colectivo Universitario de Disidencia Sexual, y también a la dimensión teórico-reflexiva de la relación entre estética, tecnologías y política.

Approved for public release; distribution is unlimited / Network Address Translation (NAT) for IPv4 was developed primarily to curb overcrowding of the Internet due to dwindling global IP addresses; however, NAT provides several other benefits. NAT can be used to mask the internal IP addresses of an Intranet. IPv6, the emerging standard for Internet addressing, provides three times the number of bits for IP addressing. While IPv6 does not need NAT for connectivity, other NAT features such as address hiding are valuable. There is currently no NAT implementation for IPv6. The focus of this research was the design and development of a NAT implementation for IPv6. This implementation will be used within a multilevel testbed. In addition, the NAT implementation developed here can facilitate the Department of Defense (DoD) transition to IPv6 planned for 2008 by providing services currently not available for IPv6. A working implementation of NAT for IPv6 within the Linux kernel has been produced. The NAT development created here has been tested for support of the protocols of TCP, UDP and ICMP for IPv6. / Ensign, United States Navy

This research evaluates IEEE 802.11b and 802.16 technologies to examine whether these wireless technologies can integrate into the tactical Internet. In order to establish a baseline, the current Marine Corps' systems architecture is analyzed with emphasis placed on mobile forces at the Regimental level and below. A side-by-side comparison between existing communication assets in the Marine Corps inventory, such as the Enhanced Position Location Reporting System (EPLRS) and Single Channel Ground and Airborne Radio System (SINCGARS), and available 802.11b/16 technologies will evaluate whether existing Command and Control requirements are met, determine the existence and extent of excess capacity, and identify potential adaptations required to implement commercial-off-the-shelf (COTS) technology into a military environment. The method for side-by-side evaluation will incorporate both COTS products as well as Marine Corps tactical communication devices in laboratory as well as field experimentation. This research captures key performance metrics such as range, power consumption, security, and bandwidth, but remains focused on the needs of the warfighter by evaluating performance of the system in support of Command and Control Compact Edition (C2CE) and Command and Control Personal Computer (C2PC) applications.

Voice over Internet Protocol (VoIP) is becoming popular due to its low cost and the management advantages it offers over traditional PSTN phone systems. VoIP is widely implemented with H.323 and Session Initiation Protocol (SIP) standards. However, both protocols are poorly designed for networks with common security solutions such as firewalls and Network Address Translation (NAT). This project is a feasibility study of SIP-based VoIP integration into the Monterey Security Architecture (MYSEA), a multilevel secure environment that uses NAT as a security mechanism. A gathering of comparative studies on VoIP protocols was performed to guide the selection of SIP as the test protocol. A set of experiments was devised and conducted using SIPbased softphones for this study. The insights gained from the experiment provide useful insights to the MYSEA project concerning VoIP security.

Approved for public release, distribution unlimited / Future military systems, many of which have unique timing requirements, will rely on the Global Information Grid (GIG) as the core data communication infrastructure. The GIG currently uses the BGP/MPLS VPN technology to provide secure and robust IP-level connectivity. This technology supports the provisioning of IP connectivity by a service provider to multiple customers over a common physical IP backbone while allowing complete logical separation of customer traffic and routing information. This research focuses on evaluating and validating the performance characteristic of BGP/MPLS VPN to determine if the use of this technology can provide the necessary performance guarantees required by military applications. A set of experiments have been performed to identify the key factors that affect the time delay of a network failure and recovery. The results show that reducing the ISIS SPF interval and TDP Hello interval could shorten the failover latency while decreasing the ISIS SPF interval and TDP Hello interval could reduce the restoration delay, hence improving the BGP/MPLS VPN failover functionality.

"This thesis will research, examine, and propose a Tactical Wireless Network infrastructure Concept of Operations in Support of Distributed Operations. Research and analysis will include the capabilities and performance characteristics of the 802.16 equipment currently implemented as part of the Marine Corps Tactical Command and Control Architecture in support of Operation Iraqi Freedom. Current Distributed Operations doctrinal capabilities will be compared to a proposed Concept of Operations that incorporates the most current state of the art wireless technologies to maximize both capability and interoperability. The method for evaluation will incorporate COTS products and Marine Corps tactical communications devices installed and operated in both a laboratory setting as well as a tactical field environment. Key performance metrics captured include equipment throughput capacity, communications bandwidth, range and distance limitations, power consumption, communications security, and transmission security. Additional metrics evaluated include level of equipment operational complexity and degree of interoperability with current USMC command and control architecture."-- p. i.

The Integrated Mobile Alert System (IMAS) is a mobile device message alerting system that provides a means for people to stay connected and receive information in a modality that is constantly available to them. The focus of this research is to develop a proof of concept for the common data format and common platform aspect of the proposed architecture. This project concentrates on the design characteristics of the IMAS-portal and server-side database. The thesis determines a way to aggregate, integrate, and sort different message formats in order to be easily displayed on a variety of mobile devices according to user profiles. It demonstrates that a web-portal written in PHP script supported by a relational database is a good configuration for IMAS. Additionally, a proof of concept system that converts messages into disseminated mobile alerts is presented. This thesis marks the founding steps in developing the IMAS. / US Navy (USN) author.

Uppsatsens syfte är att identifiera de problem som det yttrandefrihetsrättsliga ensamansvaret och teknikbundenhetenen skapar i det digitala samhället för masskommunikation.