Provisioning of quality of service (QoS) is a key issue in visible light communication (VLC) system as well as in other wireless communication systems. Due to the fact that QoS requirements are not as strict for all traffic types, more calls of higher priority traffic classes can be accommodated by blocking some more calls of lower priority traffic classes. Diverse types of high data rate traff...

and Quality (AHRQ) has annually reported on progress and opportunities for improving health care quality and reducing health care disparities. As mandated by the U.S. Congress, the National Healthcare Quality Report (NHQR) focuses on “national trends in the quality of health care provided to the American people” while the National Healthcare Disparities Report (NHDR) focuses on “prevailing disp...

introduction. in educational centers, evaluation of educational activities of teachers is done in different ways. one of the most common ways » nearly in all important universities « is student evaluation of teaching (set), which is done by questionnaires. scientific evidences have showed that in spite of frequent usage of this kind of evaluation, opinions of students about teacher’s performanc...

Priority-based model of subchannel allocation in WiMAX downlink is presented, which is based on solution of the optimization problem associated with maximizing the lower weighted bound of allocated bandwidth for each subscriber station according to its quality of service requirements for access rate and priority. Numerical research of model showed that increasing of the bandwidth requirements o...

We propose a novel architecture for multicasting of adaptively-encoded layered MPEG4 over a QoS-aware IP network. We require a QoS-aware IP network in this case to (1) Support priority dropping of packets in time of congestion. (2) Provide congestion notification to the multicast sender. For the first requirement, we use RED’s extension for service differentiation. It recognizes the priority of...

In recent, orthogonal frequency division multiple access (OFDMA) has been used for a multiuser wireless communication. In a wireless network, the transmitted signal of each user has independent channel fluctuation characteristic. By using this characteristic, OFDMA can achieve the multiuser diversity (MUDiv). Until this time, to achieve a low complexity and performance improvement, the adaptive...

To ensure the Quality of Service (QoS) of the high-priority requests, the paper proposes a Congestion Control Algorithm of Multi-Priority (CCAMP) which differentiates the QoS according to the priorities, CCAMP reserves queue buffer for the high-priority packets by dropping the low-priority packets in a certain probability. Moreover, the paper presents an improved EDF (Earliest Deadline First) s...

Background. The EORTC IN-PATSAT32 questionnaire was developed by the EORTC Quality of Life (QL) Group to assess the satisfaction of patients affected by cancer and hospitalized in oncology centers. The aim of this study is to assess the psychometric properties of the EORTC IN-PATSAT32 administered to Moroccan patients. Methods. A total of 133 hospitalized patients affected by cancer in differen...