Network on Chip: a New Approach of QoS Metric Modeling Based on Calculus Theory

A NoC is composed by IP cores (Intellectual Propriety) and switches connected among themselves by communication channels. End-to-End Delay (EED) communication is accomplished by the exchange of data among IP cores. Often, the structure of particular messages is not adequate for the communication purposes. This leads to the concept of packet switching. In the context of NoCs, packets are composed by header, payload, and trailer. Packets are divided into small pieces called Flits. It appears of importance, to meet the required performance in NoC hardware resources. It should be specified in an earlier step of the system design. The main attention should be given to the choice of some network parameters such as the physical buffer size in the node. The EED and packet loss are some of the critical QoS metrics. Some real-time and multimedia applications bound up these parameters and require specific hardware resources and particular management approaches in the NoC switch. A traffic contract (SLA, Service Level Agreement) specifies the ability of a network or protocol to give guaranteed performance, throughput or latency bounds based on mutually agreed measures, usually by prioritizing traffic. A defined Quality of Service (QoS) may be required for some types of network real time traffic or multimedia applications. The main goal of this paper is, using the Network on Chip modeling architecture, to define a QoS metric. We focus on the network delay bound and packet losses. This approach is based on the Network Calculus theory, a mathematical model to represent the data flows behavior between IPs interconnected over NoC. We propose an approach of QoS-metric based on QoS-parameter prioritization factors for multi applications-service using calculus model

REVISITING SAUDI UNIVERSITY EFL LEARNERS’ ENGAGEMENT TO TEACHERS WRITTEN CORRECTIVE FEEDBACK FROM A SOCIO-COGNITIVE PERSPECTIVE

The empirical studies addressing learners’ engagement to teachers’ corrective feedback on their writing tasks in the Saudi EFL context as well as its impact on the students’ improvement of writing skill are still a few.   Therefore, the proposed research project aims to empirically address the Saudi EFL learners’ responses to teachers’ written corrective feedback on their writing tasks. Addressing the EFL learners’ engagement in the teachers’ written feedback is a key issue in improving learners’ writing skills. As a result, the proposed project attempts to measure Saudi learners’ engagement with their learners’ feedback from a multi-dimension perspective; learners’ uptake, affective engagement, cognitive engagement, and meta-cognitive engagement, and behavioral engagement. Investigating the learners’ responses to their teacher’s feedback, the proposed project uses a socio-cognitive method that contributes to realizing the differences in EFL responses toward their teacher’s corrective feedback. The proposed study relies on different sources of data that include students’ writing assignments, semi-structured questionnaires. The sample of the study consists of  90 elementary level students belonging to the applied college at PSAU, 30 pre-intermediate students belonging to Business administration College, and 30 intermediate level students belonging to the college of humanities and sciences. The collected data reflect to what extent learners are engaged with the corrective feedback of their teachers, which can be  partly accounted for their ideas and experiences about the written corrective feedback  and second language writing and the learning context in which the feedback was received and processed. The findings of the research projects proposes that the EFL instructors should have a deeper understanding of the students’ cognitive and behavioral, engagement, feedback processing. This deeper understanding of students’ responses to written correct feedback would largely contribute to improving learners’ writing skills

On the Construction of Load-Balanced (k,r-hop)-Connected Dominating Set for WSNs

International audienceConnected Dominating Sets (CDS) are selected to construct a virtual backbone in Wireless Sensor Networks (WSNs). Indeed, CDS are used for fault tolerant broadcasting, routing and even efficient gathering of data. On the other hand, r-hop connected k-dominating sets ((k,r-hop)-CDS) are introduced to reduce the size of CDS and the total amount of information to be transmitted. Unfortunately, no work considers the load-balance factor of (k,r-hop)-CDS. Recently, there is a proposition of constructing load-balanced CDS for WSNs. In this paper we re-use the same concept of selecting load-balanced CDS to construct a Load-Balanced (k,r-hop)-CDS (LB(k,r-hop)-CDS). Then, the allocation of dominatees to the appropriate dominators is done. Through simulations, the proposed method of constructing LB(k,r-hop)-CDS extends network lifetime by an important rate compared with the most recent (k,r-hop)-CDS construction method

The Variations in the Level of Angiotensin II Between Subjects in Ajloun City and the Dead Sea Impact Hypertension Parameters

Introduction: Jordan has a unique array of diversity among which having the deepest level in the world, the Dead Sea and an area with high attitudes in Ajloun City which gives us a great chance to study the biological effects on hypertension and possible impacts in selecting the appropriate treatment. Study objectives: to explore the impacts of variations of attitudes in hypertension and the level of beta blockers through studying the level of angiotensin II among study participants and to investigate if the patterns of anti-hypertensive treatments are impacted. Methods and subjects: a cross-sectional study design was carried out among participants from the two different areas. From each area, a total of 500 participants were recruited and surveyed through a questionnaire. Blood pressure was measured for all participants and blood samples were withdrawn to carry out the testing of angiotensin II. Data were analyzed statistically based on the appropriate software including excel and SPSS. The relationships were examined according to independent T-Test. Significance was considered according to p0.05). On the other hand, heart parameters including SBP, DBP, MBP, pulse, and PCV all of which were significantly higher in Ajloun than in the Dead Sea (p=0.001) for all selected variables. The level of angiotensin II was 12.08 ± 5.19 pg/ml in Ajloun and this was higher than that of the Dead Sea (8.84 ± 4.65 pg/ml). The difference in the mean of angiotensin II was statistically significant (p=0.039). Conclusion: the results of the present study showed that living in high altitude compared with the lowest area in the world (the Dead Sea) exposes persons for the risks of hypertension and other cardiovascular diseases. Our findings may lead to better therapeutic strategies particularly when to prescribe angiotensin II based therapies

Erratum to: 36th International Symposium on Intensive Care and Emergency Medicine

[This corrects the article DOI: 10.1186/s13054-016-1208-6.]

Network on Chip: a New Approach of QoS Metric Modeling Based on Calculus Theory

Abstract: According to ITRS, in 2018, ICs wil

End to End QoS Metrics Modeling Based on Multi-application Environment in Network on Chip

Abstract To quantitatively measure quality of service (QoS) in Network on Chip (NoC), several related aspects of the network service are often considered, such as end to end delay (EED), Throughput (Thp), Packet loss rate (PLR), etc. However, until now, no standard method of performance measurement and fewer techniques have been used to provide its definition. In fact, few papers have developed different methods to modelize QoS in NoC and provided an efficient and flexible way to monitor QoS. The originality of our approach is based on a proposition of a QoSintellectual property module in NoC architecture to improve network performances. We implement an approach of QoS metrics modeling for NoC, using Analytic Hierarchy Process (AHP) on multi-parameter and multi-application for 4×4 mesh NoC environment. The results have shown that our QoS modeling approach is proven successful in providing a quantifiable representation. Therefore, QoS arbiter module interacts with other routers, the link utilization is balanced and network performance improved