1,721,031 research outputs found
Relazioni tra Sistemi Informativi ed E-Governament della Sanità
No full textIn questo articolo vengono analizzati alcuni aspetti dell’e-governament della sanità, in particolare si descrivono
le relazioni esistenti tra Sistemi Informativi Ospedalieri, ed il management aziendale, i servizi amministrativi,
il personale medico e l’utenza. La recente tendenza ad intensificare le cure del paziente al fine di diminuire
il tempo di degenza e quindi di contenere la spesa sanitaria ha reso necessario l’ adeguamento delle
strutture sanitarie alle nuove tecnologie. L’ospedale moderno sin dalla fase progettuale deve essere concepito
razionalmente come un contenitore di tecnologie con il massimo d’integrazione tra le stesse: in questa struttura
le informazioni cliniche amministrative e di management assumono sempre più importanza e diventa
fondamentale il loro scambio in modo efficiente. Queste informazioni sono gestite dal Sistema Informativo
Ospedaliero (SIO): si tratta di un sistema finalizzato alla raccolta, all’analisi ed al recupero di tutti i dati connessi
alla gestione del paziente, ai servizi diagnostici ed amministrativi, alle tecnologie biomediche ed informatiche.
All’interno del SIO i flussi di informazione sono tali da offrire un accesso completo ai dati clinici per
disporre di una cartella clinica elettronica funzionale allo sviluppo delle terapie e dei protocolli diagnostici.
Una particolare attenzione è stata rivolta agli aspetti legati alla sicurezza ed alla riservatezza dei dati sensibili
ed all’impatto dell’informatizzazione nel sistema sanitario considerandone la criticità dell’introduzione di
nuove procedure informatizzate sull’organizzazione preesistente dei reparti e dell’intero ospedal
Information System for Health-Care in E-Government
No full textThis article discusses some aspects related to egovernment
with focus on health-care, describing Health-care
Information System (HIS) involving- administrative services,
medical staff and patients. Issues such as Quality of service
provided and Privacy of data inaccordance with enforced
laws/norms and international standards are also covered.
Modern hospital in-houses different tightly integrated
technologies, where HIS is a key member. HIS permits access to
electronic medical record indicating the diagnostics and
therapies, which helps the administration to determine the
medical expenses and also the government for financial analysis.
Care has been taken to reproduce the normal work behavior
while interacting with HIS
Providing Enhanced Framework to support QoS in Open Wireless Architecture
No full textThis paper presents a novel approach to support
Quality of Service for Open Wireless Architectures (OWA),
building a suitable framework over the top of the heterogeneous
wireless MACs. It lets to enhance the existing QoS
support provided by standard MAC protocols and it uses
the contract model to guarantee QoS, taking into account
the applications requests. It negotiates dynamically Application
Level Contracts which will be translated seamlessly in
Resource Level Contracts for the underlying network services.
It receives the feedback by underlying network services to
adjust the scheduling algorithms and policies to provide
hard and soft guarantees. The framework comprises QoS
Manager, Admission Control, Enhanced Scheduler, Predictor
and Feedback System. The QoS manager component is able
to dynamically manage available resources under different
load conditions. A IEEE 802.11e Wireless LAN is simulated
to show the benefits of this approach
A IEEE 802.11e HCCA scheduler with a reclaiming mechanism for multimedia applications
Full text linkThe QoS offered by the IEEE 802.11e reference scheduler is satisfactory in the case of Constant Bit Rate traffic streams, but not yet in the case of Variable Bit Rate traffic streams, whose variations stress its scheduling behavior. Despite the numerous proposed alternative schedulers with QoS, multimedia applications are looking for refined methods suitable to ensure service differentiation and dynamic update of protocol parameters. In this paper a scheduling algorithm, Unused Time Shifting Scheduler (UTSS), is deeply analyzed. It is designed to cooperate with a HCCA centralized real-time scheduler through the integration of a bandwidth reclaiming scheme, suitable to recover nonexhausted transmission time and assign that to the next polled stations. UTSS dynamically computes with an complexity transmission time providing an instantaneous resource overprovisioning. The theoretical analysis and the simulation results highlight that this injection of resources does not affect the admission control nor the centralized scheduler but is suitable to improve the performance of the centralized scheduler in terms of mean access delay, transmission queues length, bursts of traffic management, and packets drop rate. These positive effects are more relevant for highly variable bit rate traffic
Real-time support for HCCA function in IEEE 802.11e networks: a performance evaluation
No full textThe IEEE 802.11 standard for wireless networks has been recently enhanced with the IEEE 802.11e amendment which introduces Quality of Service support. It provides differentiation mechanisms at the Medium Access Control layer, using two additional access functions: the Enhanced Distributed Channel Access (EDCA) function and the HCF Controlled Channel Access (HCCA) function. Only the HCCA mechanism is suitable for serving traffic streams with real-time requirements such as multimedia applications and Voice Over IP. The IEEE 802.11e standard does not specify a mandatory HCCA scheduling algorithm, but it offers a reference scheduler as the guideline in the resources scheduling design.In this paper we analyze four HCCA alternative schedulers to the reference one. They offer real-time guarantees proposing different solutions to the request of QoS and real-time support expressed by the increasing diffusion of multimedia applications. A performance evaluation is conducted to show the main differences between the considered schedulers, including the reference one.The results show that under several scenarios there is not a unique best scheduler, but there exists a variety of solutions depending on the specified requirements. The conclusions of the paper offer some guidelines in the choice of the scheduler tailored for a particular scenario of interest
A Framework for Enhanced QoS Support in IEEE 802.11e Networks
No full textIEEE 802.11 based WLANs have became popular, but they can only provide best effort services and so they are poorly suitable for multimedia applications. Recently IEEE 802.11e standard has been proposed to support quality of service. The new standard introduces a so-called Hybrid Coordination Function containing two medium access mechanisms: contention-based channel access and controlled channel access.
In this paper we propose a novel framework to better support QoS guarantees for multimedia applications. It comprises QoS Manager, Admission Control, Enhanced Scheduler, Predictor and Feedback System. The scheduler adopted supports real-time applications, variable packet sizes and variable bit rate traffic streams. We show that this framework is suitable to be used by applications requesting Application Level Contracts which will be translated in Resource Level Contracts to the scheduler subsystem. The QoS manager component is able to dynamically manage available resources under different load conditions
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