Search results for "GSM"

A “Best Current Practice” for 3GPP-based cellular system security

2014

This paper is an attempt at formulating a Best Current Practice (BCP) for access security and a baseline for core network security in the 3GPP-based systems. This encompasses the 2G circuit-switched GSM system, the 2.5G packet-switched GPRS system, the 3G UMTS system and the 4G LTE/LTE-A system. The 3GPP have defined several security standards, but many measures are optional and there are several areas deliberately not covered by the 3GPP standards. The present document is therefore an attempt at pointing out the best available options and providing advice on how to achieve an overall system hardening, which is badly needed as the cellular systems have undoubtedly become one of the most cri…

Secure and scalable dataprocessing and communications for an Animal Tracking System

2003

Masteroppgave i informasjons- og kommunikasjonsteknologi 2003 - Høgskolen i Agder, Grimstad Modern technology is constantly being employed in new fields, by new industries and people. The cost of advanced technological equipment decreases continously, and equipment that was reserved for people and corporations with a lot of money has now become household products. This enables many interesting ideas and projects, Kitron Development’s radiocollar project being one of them. Kitron Development is involved in a project to track the position of animals by substituting the traditional bell collar with a collar that contains a GPS receiver. The collar transmits its position to a base station using…

Zwölf Basisregeln der medikamentösen Tumorschmerztherapie

1999

□ Eine erfolgreiche medikamentose Schmerztherapie basiert auf einer sorgfaltigen Schmerzanalyse und Erfassung der Schmerzstarke vor und wahrend der Therapie.

Transgastric imaging-The key to successful periprocedural TEE guiding for edge-to-edge repair of the tricuspid valve.

2021

Intraprocedural transesophageal echocardiography (TEE) guidance plays an essential role in transcatheter repair therapy of the tricuspid valve (TV). So far, several different imaging concepts are in use. We propose an imaging protocol that fully addresses the morphological complexity of the TV and further offers efficacious workarounds for the frequently occurring restrictions of TV imaging in edge-to-edge repair of the TV. As a tertiary referral center with a large experience of more than 250 cases of transcatheter edge-to-edge repair (TEER) of the TV performed at the Heart Valve Center in Mainz/Germany, we have constantly adapted our peri-interventional echocardiographic approach to accom…

Reading the Transformations of an Urban Edge: From Liberty Era Palermo to the City of Today

2019

To honour the battle of 27 May 1860, in 1910 the Palermo City Government decided to realise a commemorative monument. A position at the centre of a large circular plaza was of have afforded the monument a greater solemnity. The commission for the Monument was awarded to Ernesto Basile. In 1927 the City Government decided to dedicate the monument to the Fallen and asked Basile to complete the monument adding an architectural backdrop. The first version of the new project was a fence that enveloped the entire square and the ring road, interrupted only by entrances near the streets flowing into the square, and dividing it into four sectors. The final design instead called for the realisation o…

Depth Enhancement by Fusion for Passive and Active Sensing

2012

This paper presents a general refinement procedure that enhances any given depth map obtained by passive or active sensing. Given a depth map, either estimated by triangulation methods or directly provided by the sensing system, and its corresponding 2-D image, we correct the depth values by separately treating regions with undesired effects such as empty holes, texture copying or edge blurring due to homogeneous regions, occlusions, and shadowing. In this work, we use recent depth enhancement filters intended for Time-of-Flight cameras, and adapt them to alternative depth sensing modalities, both active using an RGB-D camera and passive using a dense stereo camera. To that end, we propose …

Real-Life Experiments based on IQRF IoT Testbed: From Sensors to Cloud

2018

Master's thesis Information- and communication technology IKT590 - University of Agder 2018 Internet of things (IoT) is the next generation internet technology which connects devices and objects intelligently to control data collected by diverse types of sensors, radio frequency identification and other physical objects. To address the challenges in IoT such as integrating artificial intelligent techniques with IoT concept, developing green IoT technologies and combining IoT and cloud computing, various platforms which support reliable and low power wireless connectivity are required. IQRF is a recently developed platform for wireless connectivity. It provides low power, low speed, reliable…

Evolution in telecommunication standardisation practices : the case of 3rd generation wireless communications

1999

Ārvalstu tiešo investīciju ietekme uz Latvijas ekonomiku

2021

Pētījuma ietvaros tiek pielietota pielāgota Granger cēloņsakarības testēšanas metodoloģija, kas pieļauj VAR modelēšanu uz nediferencētām un iespējams kointegrētām laikrindām, lai noskaidrotu vai eksistē un kādā virzienā ir novērojama cēloņsakarība starp Latvijas iedzīvotāju ienākumu līmeni, darbaspēka produktivitāti un ārvalstu tiešajām investīcijām. Analīzes rezultāti, kas tiek balstīti uz īpaša VAR sastādīšanas mehānisma un modificēta Wald testa, liecina, ka ārvalstu investīcijām Latvijā nav cēloņsakarības ne ar labklājības līmeni, ne ar darbaspēka produktivitāti. Turklāt impulsa atbildes funkcijas norāda, ka ĀTI un darbaspēka produktivitātes šoki uz ienākumu līmeni ir īstermiņa un pārejo…

Performance Enhancement of Multimedia Broadcast Multicast Service (MBMS) with Receive Diversity

2007

The aim of this paper is to evaluate the effect of receive diversity on multimedia broadcast multicast service (MBMS) performance in wideband code division multiple access (WCDMA) networks. In addition to time diversity provided by long interleaving and receive diversity provided by multiple receive antennas, 3GPP release 6 specifications for MBMS introduce two macro diversity schemes: soft and selective combining. Diversity techniques are introduced in order to improve the MBMS performance. Improvements help especially the cell edge MBMS users who suffer most from the fading channel conditions. As receive diversity is one of the most efficient diversity techniques this paper examines the s…