Suchergebnisse

Die Langzeitarchivierung digitaler Daten stellt die moderne Informationsgesellschaft im Allgemeinen, den medizinischen Sektor im Speziellen vor bislang nicht bekannte Probleme. Ärzte und Zahnärzte müssen die Gesundheitsdaten ihrer Patienten ebenso wie alle angefertigten Röntgenaufnahmen und Aufzeichnungen z. T. bis zu 30 Jahren aufbewahren. Angesichts der sich ständig verändernden Technologien, immer neuer Software, Formate und Standards bedeutet dies eine enorme Herausforderung. Mit dem exponentiellen Wachstum digitaler Daten wachsen die Probleme der langfristigen Aufbewahrung, obwohl moderne Softwaretechnologien wesentlich besser geeignet sind, Informationen zu verwalten, als dies herkömmlich mit Filmen oder Folienausdrucken möglich war. Die dieser Arbeit zugrunde liegende Studie hat gezeigt, dass die Anwender der digitalen Radiographie und Volumentomographie weder von Seiten der Hersteller, noch vom Gesetzgeber zu einem langfristig umsetzbaren Archivierungskonzept angeleitet wurden. Das mit Abstand am häufigsten verwendete Speichermedium ist die CD-R, die jedoch angesichts der bereits heute relativ großen Datenmengen als unpraktikabel und unwirtschaftlich angesehen werden muss. Das vorgeschlagene Datensicherungskonzept sieht eine nach dem Vorbild von Bildarchivierungs- und Kommunikationssystemen (PACS) geartete mittelfristige Speicherung der Daten auf redundanten Festplattenverbänden (RAID-Systemen) mit einer langfristigen Archivierung auf mobilen Datenträgern, die dem jeweiligen Stand der Technik entsprechen, vor. Durch die stete Steigerung der Transferraten innerhalb öffentlicher Netzwerke und den Ausbau der Leistungen professioneller Dienstleistungsunternehmen wird eine zukünftige Auslagerung dieser Kompetenz als zunehmend wahrscheinlich eingestuft. ; The long-term archiving of digital data confronts the modern information society in general, the medical sector in particular with up to now not acquainted problems. Physicians and dentists have to preserve the health data of their patients just as well as all made x-rays and records partly up to thirty years. In view of the perpetually changing technologies, software, formats and standards, this means a tremendous challenge. With the exponential increase of digital data the problems of a long-term storage grow, although modern softwaretechnologies are considerably better qualified to govern data as it was with conventional x-ray films. The study this paper is based on showed that the user of digital radiography and cone beam tomography have not been instructed for a long-term realizable archiving-concept neither by the manufacturer nor by the government. The data carrier most commonly used is the CD-R, which however in terms of the already existing amount of data has to be appraised as inefficient. The recommended data archiving modell contains a medium-term storage on redundant harddisk-arrays (RAID-systems) and a long-term storage on state-of-the-art mobile data carriers. Because of the steady increase of public network data transfer rates and the service enhancement of professional companies, a prospective outsourcing of this expertise seems to be probable.

This document records the state documents published by state agencies and the legislature that were sent annually to the Department of Archives and History. Publications are listed alphabetically by the name of the agency and each listing includes the title, author, volume and number, date of publication, number of pages, and price if any.

One of the most important methods in new product development is the Technical one, It works basically to insert new product to the market or create some other one never seen before, This method has some collateral effects on the consumption way the costumer get used on. This product may also be focused on some categories of customers, and less responsive to the needs comparing to another specialized products, This technical developed product may also let the costumer feel that he pays on unused features.

The issue of the expanding access to the high-speed Internet through 4G wireless mobile network has been studied in the article. The purpose of the research was to determine the vectors for the development of Internet access through mobile devices in the world and the stage of implementation of these technologies in Ukraine by the case of Dnipropetrovsk region.The methodological basis of the study was the comparative analysis and the Foresight methodology. Documents of international organizations, open source data on the use of 3G / 4G technology by mobile network providers in the territory of Dnipropetrovsk region, expert surveys of specialists of governing bodies in the united territorial communities have been used as information sources. Speeds of mobile Internet networks in countries around the world have been reviewed by authors, paying attention to the current availability of 4G network coverage using mobile devices with the required operating frequency ranges and high requirements to network speeds. The result of the paper became the determination of relations between the spread of 3G / 4G mobile network and development of the e-governance in the studied territories. In particular, this includes the level of development and functioning of local governments' web portals, ensuring the access of population to the public information and electronic public services. A comparative analysis of the open statistic data on Internet access through mobile devices in the EU and Ukraine has been made. The basic stages of mobile 3G, 4G and 5G generations networks implementation in Ukraine have been described. The available possibilities for mobile devices made for use on 4G networks have been presented.The research of the state of 3G / 4G network coverage in territories of 60 united territorial communities of Dnepropetrovsk region has been carried out and the data on aggregated integrated coverage indicators of 3G / 4G network have been systematized. It has been proven that the use of 3G / 4G technology creates ...

As a license-exempt technology, Ultra Wideband (UWB) can be used for numerous commercial and military applications, including ranging, sensing, low-range networking and multimedia consumer products. In the networking and consumer fields, the technology is envisioned to reach the mass market, with a very high density of UWB devices per home and office. The technology is based on the concept of transmitting a signal with very low power spectral density (PSD), while occupying a very wide bandwidth. In principle, the low emissions mask protects incumbent systems operating in the same spectrum from being interfered with, while the wide bandwidth offers the possibility of high data rates, in excess of 250 Mbps. UWB has been regulated to operate in the 3.1 to 10.6 GHz portion of the spectrum, with an emissions mask for the lower and upper bands outside this range. The commercial wireless mobile services based on third generation (3G) networks occupy a portion of the spectrum in the 2 GHz band, falling under the UWB emissions mask. UWB and UMTS (Universal Mobile Telephone Systems) devices will coexist, sharing the same spectrum. In this research, we investigate the UWB-3G coexistence problem, analyzing the impact of UWB on UMTS networks. Firstly, we review the mathematical model of the UWB signal, its temporal and spectral properties. We then analyze and model the effects of the UWB signal on a narrowband receiver. Next, we characterize the response of the UMTS receiver to UWB interference, determining its statistical behavior, and establishing a model to replicate it. We continue by proposing a link level model that offers a first order quantitative estimate of the impact of a UWB interferer on a UMTS victim receiver, demonstrating the potentially harmful effect of UWB on the UMTS link. We elaborate on that initial evidence by proposing and implementing a practical systemlevel algorithm to realistically simulate the behavior of the UMTS network in the presence of multiple sources of UWB interference. We complete the research by performing UMTS system level simulations under various conditions of UWB interference, with the purpose of assessing its impact upon a typical UMTS network. We analyze the sensitivity of the main UWB parameters affecting UMTS performance, investigating the coverage and capacity performance aspects of the network. The proposed analysis methodology creates a framework to characterize the impact that mass-deployed UWB can have on the performance of a 3G system. The literature on UWB-3G coexistence is inconclusive, and even contradictory, as to the impact UWB can have on the performance of third-generation wireless networks. While some studies show that UWB can be highly detrimental to 3G networks, others have concluded that both systems can gracefully coexist. Through this study, we found that at the current emissions limits regulated for UWB, a mass uptake of this technology can negatively affect the performance of third-generation (3G) wireless networks. The quality of service experienced by a 3G user in close proximity to an active UWB device can be noticeably degraded, in the form of reduced coverage range, poor voice quality (for a voice call), lower data rates (for a data session) or, in a extreme situation, complete service blockage. As the ratio of UWB devices surrounding a 3G user grows, the degradation becomes increasingly more evident. We determined that in order for UWB tocoexist with 3G networks without causing any performance degradation, a minimum power backoff of 20 dB should be applied to the current emission limits. ; Ph. D.