An Intelligent Tutoring System for Cloud Computing

Intelligent tutoring system (ITS) is a computer system which aims to provide immediate and customized or reactions to learners, usually without the intervention of human teacher's instructions. Secretariats professional to have the common goal of learning a meaningful and effective manner through the use of a variety of computing technologies enabled. There are many examples of professional Secretariats used in both formal education and in professional settings that have proven their capabilities. There is a close relationship between private lessons intelligent, cognitive learning and design theories; and there are ongoing to improve the effectiveness of ITS research. And it aims to find a solution to the problem of over-reliance on students' teachers for quality education. The program aims to provide access to high-quality education to every student, and therefore the reform of the education system as a whole. In this paper, we will use Intelligent Tutoring System Builder (ITSB) to build an education system on cloud computing in terms of the concept of cloud computing and components and how to take advantage of cloud computing in the field

Enhancing the Surface Properties of Aluminium Alloy 6061 by Laser Cladding with DWCNTs and MWCNTs using an Automated Pulsed Nd:YAG Laser

Industrial applications of nanomaterial in particular carbon nanotubes ??(CNTs) have increased from ?various viewpoints, such as, high performance, ?energy saving, cost saving, and environmental concerns. ?Laser cladding ?technique has been used successfully to modify the surface properties of ?materials, i.e., ?improving their wear and corrosion resistance. This work ?involves cladding aluminum alloy (Al 60601) with ?different types of carbon ?nanotubes (multi-walled carbon nanotubes (MWCNTs) and double ?walled ?carbon nanotubes (DWCNTs)) by an automated pulsed Nd:YAG laser. This ?was achieved by ?controlling selected cladding parameters which are laser ?power, pulse duration, and working frequency. The ?experimental ?investigation included microhardness, energy dispersive X-ray, corrosion ?resistance and ?microstructure topography by scanning electron microscope. ?The optimum estimated laser parameters for ?achieving the best results at ?spot diameter of 3 mm were (peak power of 3.1 kW, pulse duration of 16 ?msec ??(3 msec as pre heating and 13 msec as the main action time of the ?pulse) and working frequency of 1.5 Hz.? Results indicated that laser cladding of Al 6061 using DWCNT ?enhanced three of the most important of ?surface properties which are ?hardness, abrasive wear resistance and corrosion resistance more than did ?the ?MWCNTs. The distribution of the MWCNTs on the surface of Al 6061 ?is better than that for the DWCNTs ?but its penetration is less.? Keywords: Laser cladding, CNTs, DWCNTs, MWCNTs, AL6061

Media Discourse Analysis: An Application of Goffman’s Frame Analysis

This paper presents an application of Goffman’s Frame Analysis on media discourse. The paper also presents another study by a Brazilian researcher who conducted a similar study comparing the media coverage of a news theme on a specific day, Christmas day. The media discourse example of this paper is taken from the Oscars awards ceremony 2016; particularly the press interview after the awarding ceremony. The incident at hand is the famous one by the Egyptian journalist who asked the Oscar winner Leonardo DiCaprio a meaningless question out of context whose video went viral on social media and famous world newspapers. The paper covers various frames that can help analyze the incident on linguistic, social, and even political backgrounds and it also provides possible interpretations of that incident in relation to frame analysis. Keywords: media, discourse ,Goffman, Oscars, frame analysis DOI: 10.7176/JEP/10-26-05 Publication date:September 30th 201

Enhancing performance of conventional computer networks employing selected SDN principles

This thesis was submitted for the award of Doctor of Philosophy and was awarded by Brunel University LondonThis research is related to computer networks. In this thesis, three main issues are addressed which affect the performance of any computer network: congestion, efficient resources utilization and link failure. Those issues are related to each other in many situations. Many approaches have been suggested to deal with those issues as well as many solutions were applied. Despite all the improvements of the technology and the proposed solutions, those issues continue to be a burden on the system’s performance. This effect is related to the increase of the Quality of Service (QoS) requirements in modern networks. The basic idea of this research is evolving the intelligence of a conventional computer network when dealing with those issues by adding some features of the Software Defined Networking (SDN). This adoption upgrades the conventional computer network system to be more dynamic and higher self-organizing when dealing with those issues. This idea is applied on a system represented by a computer network that uses the Open Shortest Path First (OSPF) routing protocol. The first improvement deals with the distribution of Internet Protocol (IP) routed flows. The second improvement deals with tunnel establishment that serves Multi-Protocol Label Switching (MPLS) routed flows and the third improvement deals with bandwidth reservation when applying network restoration represented by Fast Re-route (FRR) mechanism to sooth the effect of link failure in OSPF/MPLS routed network. This idea is also applied on another system that uses the Enhanced Interior Gateway Routing Protocol (EIGRP) to improve the performance of its routing algorithm. Adopting the SDN notion is achieved by adding an intelligent controller to the system and creating a dialog of messages between the controller and the conventional routers. This requires upgrading the routers to respond to the new modified system.Our proposed approaches are presented with simulations of different configurations which produce fine results

Influence of Aqueous Extract of Red Chillis Pepper as Curative for Gastric Ulcer in Albino Rats

The present study was carried out elucidate the effect of aqueous extracts of red chillis pepper (Capsicum frutescence) at three doses on the length of gastric ulcer induced by aspirin in rats. Thirty adult male albino rats (Sprague Dawley Strain) weight 175±5g were used and divided into 5 groups, each of 6 rats. The first group was used as a control negative (-ve) and fed on the basal ration only, other groups had given aspirin orally (200 mg/kg B.Wt.), one of these groups left as control +ve (ulcerated rats) and other groups administrated with aqueous extract of red chillis pepper (RCP) at doses of 250, 500 and 750 mg/kg B.Wt. for seven days. The length of gastric ulcer, volume of gastric juice, pH value and histopathological changes of gastric were examined. The results revealed that oral administration of RCP extract at 250, 500 and 750mg/kg B.Wt. reduced the length of gastric ulcer. On the other hand, all extracts increased pH value of gastric juice compared to control (-ve) group, meanwhile the volume of gastric juice decreased by plant extracts specially for rats feed on RCP at dose 750 mg\Kg B.Wt. Oral administration of water plant extracts decreased histopathological changes in the stomach layers and mucosa. The present study suggests that, Capsicum frutescence could be used for healing acute gastric ulcer disease and implemented for gastric ulcer patients. Key words: aqueous extracts, Capsicum frutecens, aspirin ulcer, stomach, histopathological changes, pH value and gastric juice

Oil-in-water microemulsion encapsulation of antagonist drugs prevents renal ischemia-reperfusion injury in rats

Developing new therapeutic drugs to prevent ischemia/reperfusion (I/R)-induced renal injuries is highly pursued. Liposomal encapsulation of spironolactone (SP) as a mineralocorticoid antagonist increases dissolution rate, bioavailability and prevents the drug from degradation. In this context, this work develops a new formulation of oil-in-water type microemulsions to enhance the bioavailability of SP. The size of the SP-loaded microemulsion was about 6.0 nm by dynamic light scattering analysis. Briefly, we investigated the effects of nano-encapsulated SP (NESP) on renal oxidative stress, biochemical markers and histopathological changes in a rat model of renal I/R injury. Forty eight male Wistar rats were divided into six groups. Two groups served as control and injury model (I/R). Two groups received “conventional” SP administration (20 mg/kg) and NESP (20 mg/kg), respectively, for two days. The remaining two groups received SP (20 mg/kg) and NESP (20 mg/kg) two days before induction of I/R. At the end of the experiments, serum and kidneys of rats underwent biochemical, molecular and histological examinations. Our results showed that I/R induces renal oxidative stress, abnormal histological features and altered levels of renal biomarkers. Administration of SP in healthy animals did not cause any significant changes in the measured biochemical and histological parameters compared to the control group. However, SP administration in the I/R group caused some corrections in renal injury, although it could not completely restore I/R-induced renal oxidative stress and kidney damage. On the contrary, NESP administration restored kidney oxidative injury via decreasing renal lipid peroxidation and enhancing glutathione, superoxide dismutase and catalase in kidneys of the I/R group. The deviated serum levels of urea, creatinine, total proteins and uric acid were also normalized by NESP administration. Furthermore, NESP protected against renal abnormal histology features induced by I/R. Therefore, NESP has beneficial effects in preventing kidney damage and renal oxidative stress in a rat model of I/R, which deserves further evaluations in the future

Feeling comfortable outdoors : a phenomenological understanding of microclimate perception in the Egyptian context

PhD ThesisThe purely physical approach used to characterize thermal comfort is not informative for many urban designers and landscape architects. Significantly, this theoretical approach has been criticized due to the lack of consideration of human sensations and perceptions. Recent research has shown an increased consideration for the psychological and behavioural aspects of outdoor thermal comfort. However, the theoretical and methodological bases employed to consider the human aspect raise questions which may argue the quality of the produced knowledge. On the other hand, the perceptual links between microclimate and spatial configurations studied in a few studies is an interesting subject for landscape architects; nevertheless, it remains poorly researched. Therefore, this study takes an atypical approach to understanding outdoor comfort in the Egyptian summer climate, aiming to inform the design of open spaces which people would perceive as comfortable. The study offers a possible phenomenological understanding of the inherent sense of microclimate (dis)comfort in view of phenomenological notions of embodiment and multi‐sensory perception. The phenomenology of atmosphere and weather offered a theoretical perspective to approach and understand human relations to the microclimates. The methodological approach taken to understand the microclimate perception was inspired by Heidegger’s philosophy, with its emphasis on the occurrence of understanding while being in the world, and valuing subjectivity and historicity in understanding. The researcher’s prolonged touring and immersion in the microclimates was followed by investigation of 17 participants’ intentional walking experiences within the microclimates. The findings went beyond the intuitive knowledge held in mind about shade and water preferences as related to comfort in the Egyptian climate context. The study disclosed new insights into understanding outdoor comfort, originally within sunny microclimates. It was found that the microclimate perception is a perception of an atmospheric configuration, which is affected by the deep interplay of humans, place, and time. The perceived spatial physiognomies intruded with variant levels upon human perception of (dis)comfort. Interestingly, the concluded design implications do not often support the conclusions of previous experimental studies in hot, arid regions. This emphasizes the differences between subjective and objective examinations of microclimate and comfort. The study concludes that the issue of evoking and promoting comfortable feelings outdoors should be given more focal consideration in open space design than the expected impacts recommended by experimental investigations.the ministry of Higher Education, Egypt, for a study abroad sponsorshi

Platelet-rich Fibrin for Chronic Wounds Management

Background: A chronic wound can be defined as any wound that fails to heal within a reasonable period. Platelet-rich fibrin (PRF) is a second-generation platelet concentrate. It is safe, simple, affordable and less expensive procedure in treatment of chronic wounds.Objective: This study aimed to assess safety and effectiveness of platelet-rich fibrin for treatment of chronic wounds. Patients and methods: This prospective study included 50 patients with chronic ulcer not responding to conventional therapy for at least 6 weeks, normal values blood tests especially platelet count, red blood cell count and serum albumin level. Debridement of the necrotic tissues was done using surgical and chemical debridement. The fibrin clot membrane was applied to the ulcer followed by paraffin gauze and secondary sterile dry dressing.Results: Complete wound healing occurred in 18 of 50 patients before 8th week of therapy (36%). A decrease in the mean area was observed from 7.22 ± 5.80 cm2 before treatment to 0.98 ± 1.52 cm2 after 8 weeks of therapy, which was highly significant.Conclusions: The use of PRF is effective, simple, affordable and inexpensive method allowing acceleration of healing of chronic wounds