Structure and classification of Hom-associative algebras

The purpose of this paper is to study the structure and the algebraic varieties of Hom-associative algebras. We give characterize multiplicative simple Hom-associative algebras and show some examples deforming the $2\times 2$-matrix algebra to simple Hom-associative algebras. We provide a classification of $n$-dimensional Hom-associative algebras for $n\leq3$. Then study their derivations and compute small Hom-Type Hochschild cohomology groups. Furthermore, we discuss their irreducible components

Data-Aware Scheduling Strategy for Scientific Workflow Applications in IaaS Cloud Computing

Scientific workflows benefit from the cloud computing paradigm, which offers access to virtual resources provisioned on pay-as-you-go and on-demand basis. Minimizing resources costs to meet user’s budget is very important in a cloud environment. Several optimization approaches have been proposed to improve the performance and the cost of data-intensive scientific Workflow Scheduling (DiSWS) in cloud computing. However, in the literature, the majority of the DiSWS approaches focused on the use of heuristic and metaheuristic as an optimization method. Furthermore, the tasks hierarchy in data-intensive scientific workflows has not been extensively explored in the current literature. Specifically, in this paper, a data-intensive scientific workflow is represented as a hierarchy, which specifies hierarchical relations between workflow tasks, and an approach for data-intensive workflow scheduling applications is proposed. In this approach, first, the datasets and workflow tasks are modeled as a conditional probability matrix (CPM). Second, several data transformation and hierarchical clustering are applied to the CPM structure to determine the minimum number of virtual machines needed for the workflow execution. In this approach, the hierarchical clustering is done with respect to the budget imposed by the user. After data transformation and hierarchical clustering, the amount of data transmitted between clusters can be reduced, which can improve cost and makespan of the workflow by optimizing the use of virtual resources and network bandwidth. The performance and cost are analyzed using an extension of Cloudsim simulation tool and compared with existing multi-objective approaches. The results demonstrate that our approach reduces resources cost with respect to the user budgets

Scalable and Cost Efficient Algorithms for Virtual CDN Migration

Virtual Content Delivery Network (vCDN) migration is necessary to optimize the use of resources and improve the performance of the overall SDN/NFV-based CDN function in terms of network operator cost reduction and high streaming quality. It requires intelligent and enticed joint SDN/NFV migration algorithms due to the evident huge amount of traffic to be delivered to end customers of the network. In this paper, two approaches for finding the optimal and near optimal path placement(s) and vCDN migration(s) are proposed (OPAC and HPAC). Moreover, several scenarios are considered to quantify the OPAC and HPAC behaviors and to compare their efficiency in terms of migration cost, migration time, vCDN replication number, and other cost factors. Then, they are implemented and evaluated under different network scales. Finally, the proposed algorithms are integrated in an SDN/NFV framework. Index Terms: vCDN; SDN/NFV Optimization; Migration Algorithms; Scalability Algorithms.Comment: 9 pages, 11 figures, 4 tableaux, conference Local Computer Networks (LCN), class

Appeal against the Judgment of Bankruptcy In light of The New Judicial Systems in the Kingdom of Saudi Arabia

This paper presents the challenge to the ruling of Bankruptcy This paper presents the challenges against the judgment of Bankruptcy in light of the new judicial systems in the Kingdom of Saudi Arabia, which has changed significantly the UK litigation system. Where was the creation of specialized courts, including commercial courts, the adoption of the principle of litigation on the two instances, and the establishment of the Supreme Court to monitor the proper application of the provisions of Shariaa and regulations (laws). Therefore, bankruptcy suits have become passed by two phases of litigation. The first instance in front of first-class commercial court, and again before the Court of Appeal. This paper explains the ways to object to the judgment of bankruptcy before the Court of Appeal as a ordinary means, and then to the Supreme Court as a extraordinary means, according to the provisions contained in the new Saudi legal pleadings Act issued in 2/1/ 1435H. The Paper concluded that the need to change the Saudi commercial system issued in 1350H, and change the name of the commercial court system to the commerce Act, so as to take into account the fundamental changes that have occurred in the bankruptcy system, both in terms of procedures and in terms of the subject

Evolution of second trimester low implanted placenta to previa at term: a prospective cohort study

Background: The objective of this study is to identify the percentage of low implanted placenta (LIP) at second trimester of pregnancy and identify the risk factors of its persistence to placenta previa (PP) at term.Methods: Through a registered prospective cohort study conducted at tertiary hospital in Upper Egypt, authors screened all pregnant ladies comes to present facility for antenatal second trimester USG between 18-24 weeks gestation. All participants interviewed for detailed risk factors of placenta previa. Those diagnosed to have a LIP (≤1.5 cm from the internal os) had had TVS to confirm the exact distance between the lower edge of the placenta and the internal os. Serial USG had been done every 4 weeks up to delivery to measure the same distance. The primary outcome was the percentage of LIP at 18-24 weeks. Logistic regression analysis was performed to predict the risk factors for PP at term.Results: Through screening of 1000 pregnant lady, LIP had been identified in (52 cases) 5.2% of pregnant women between 18-24 weeks. This percentage dropped gradually to reach 1.3% at 36 weeks of gestation and at time of delivery. The logistic regression analysis demonstrated that the distance between the internal os and the lower edge of the placenta between 18-24 weeks was the single significant variable associated with PP at term (p<0.001, odds ratio 0.319, 95% CI 0.20-0.50). However, excluding the distance from the regression model demonstrated other risk factors as previous miscarriage, previous cesarean section (CS), and history of multiple pregnancies and history of previous PP.Conclusions: About 5.0% of pregnant women have LIP at the second trimester of pregnancy (18-24 weeks) and only 25.0 % of them remain placenta previa at term. A cut-off value of 10 mm between the internal os and the lower edge of the placenta is the most important predictor of development of PP

Vaginal misoprostol before elective cesarean section for preventing neonatal respiratory distress: a randomized controlled trial

Objective: The current study aims to evaluate the efficacy of vaginal misoprostol before elective cesarean section (ECS) for preventing the occurrence of neonatal respiratory distress (RD). Materials and Methods: A randomized controlled trial (NCT03239327) was carried out in a tertiary-care university-affiliated hospital between June 2016 and August 2017. All eligible pregnant women scheduled for ECS were randomly allocated in a 1:1 ratio to two groups. One group, the Misoprostol group, received a misoprostol 50 mcg vaginal tablet 60 minutes before ECS while the other, the Control group, received no drugs before ECS. The primary outcome was the rate of neonatal RD among the study groups. Results: The study included 146 women in each arm, with no significant difference between the baseline characteristics of members in each group. Primary outcomes resulted in 22 (15.1%) newborns in the misoprostol group having RD at birth versus 44 (30.1%) newborns with RD in the control (P =0.02). No differences were found between the groups regarding the need for neonatal intensive care unit (NICU) admission (P =0.61), duration of NICU stay (P =0.08) and neonatal mortality rate (P =0.73). Conclusion: Prophylactic vaginal misoprostol at a dose of 50 mcg administered 60 minutes before ECS could reduce the rate of neonatal RD and improve the neonatal respiratory outcomes

Perspective Chapter: Reflection from the Field of Medical Education in the COVID-19 Pandemic—New Strategies and Practices in Achieving Needed Competencies for Students

The COVID-19 issue forced necessary changes in medical education that have been demanding and adjusting for different medical colleges, but they also provide a great opportunity for the betterment and possible challenging and useful transformation of medical education. This chapter examined the responses of medical organizations to this pandemic, its merits, and its challenges. It analyzed the potential effects of new strategies’ recognition and application on medical education in the post-COVID-19 period. The status of medical education before COVID-19 and the challenges of adopting competencies have been reviewed. The teaching and assessment strategies innovated in the COVID-19 era and reflections from faculty and students were discussed. Over the previous years, the pandemic has questioned concepts about how medical education should be delivered. The COVID-19 pandemic offers the medical education community a unique chance to reorient itself away from outdated standards and practices and toward more societally responsible and accountable standards and practices. All involved in medical education should all work together to prevent situations from “snapping back” to how they have always been because they were accepted practices and would be lost if the pandemic had the potential to disrupt growth and reform