Modelling real-world renewable hydrogen energy systems for enabling Scotland zero-carbon ambition.

Hydrogen is described as one of the most indicative scenarios for meeting Scotland Net-Zero carbon ambition set out for 2045. According to the 2021 Scottish Government’s hydrogen policy statement, the target is to invest 5 GW of renewable and low-carbon hydrogen by 2030 and to boost the planned capacity to 25 GW by 2045 to transform Scotland into a hydrogen nation. To enable meeting such ambitious goal and promoting the development of renewable hydrogen, there should be accurate dynamic modelling tools and approaches for simulating the entire operation of real-world renewable hydrogen energy systems and measuring realistic opportunities for decarbonizing miscellaneous energy sectors. This talk will investigate the potential of a precise dynamic model designed for sizing solar-hydrogen energy systems and accurately simulating their real-world dynamic behaviors in charging and discharging on-site hydrogen fuel considering an effective energy management operation that can ensure increased clean energy supply towards decarbonizing the Scottish building sector. The developed model has been tested and validated on a group of grid-connected buildings within a Scottish university and the obtained results have demonstrated effectiveness in planning the integration of renewable-hydrogen energy systems within grid-connected buildings

Adjoint Operator in Probabilistic Hilbert Space

Abstract: The purpose of this paper is to give a definition for the adjoint operator in Probabilistic Hilbert Space and its properties by using Riesz Representation Theorem.   Keywords: Probabilistic Hilbert Space; Adjoint Operator; properties of adjoint operator

Influence of layer bonding on compressive strength of 3D printed structure: An experimental study

The impact of 3D printing parameters is critical for expanding the application of technology in the design and construction. The effect of bonding layers on the compressive strength of the material is investigated in this research by variation of the layer thickness and print speed. Cube specimens with layer thicknesses ranging from 0.05 to 0.3mm and print rates of 40mm/s, were tested on compression with the DARTEC test equipment. It was found that layer thicknesses of 0.05mm and 0.15mm have similar elastic properties while the 0.15mm layer can take additional load after initial plastic deformation. Layer thickness of 0.30mm has significantly lower elastic zone load capacity, but the stress in plastic zone continue to grow. The findings are of great importance for in explaining the S-N curve in order to enhance part manufacture

Sleep Quality and Its Health Correlates Among Egyptian Secondary School Students

The objective of the recent study was to determine the prevalence of poor sleep quality and to assess its psychological and general health correlates among secondary school students in the city of Assiut, Egypt. A cross sectional study was conducted among 829 secondary school students (selected by multistage stratified random sampling) aged 15–19 years in Assiut. Students filled in a self-administered questionnaire that included demographic data, Pittsburgh Sleep Quality Index (PSQI), Epworth Sleepiness Scale, general perception of health, and the short form of Depression Anxiety and Stress Scale. The prevalence of poor sleep quality (PSQI \u3e5) was 72.5%. The mean PSQI score was 7.35 ± 2.94 standard deviation. Poor sleep quality was higher among females, urban residents and public school students. Correlates of poor sleep by multivariate analysis were age, urban residence, public education, mild to moderate and severe to very severe anxiety symptoms, severe to very severe depressive symptoms, excessive daytime sleepiness, and feeling fully active sometimes and not active at any time. Poor sleep quality was alarmingly highly prevalent among secondary school students, with significant health consequences. Increasing the awareness of the community especially adolescents, parents, and school teachers about healthy sleep is an essential priority

Bullying in Schools in the United Arab Emirates and the Personal Safety of Students

© 2018, Springer Nature B.V. Although considerable research has been directed towards understanding and addressing bullying in schools in western countries, comparatively little has been undertaken in Arab countries. This article provides the first detailed examination of the nature and prevalence of peer victimisation and bullying behaviour among students in Grades 6 to 9 in 20 schools in the United Arab Emirates (UAE). Questionnaires designed to assess the prevalence of different forms of bullying, as experienced by students and as perpetrated by their peers, were answered anonymously by 841 boys and 938 girls. In addition, questions were asked on how often students engaged in pro-social behaviour at school and how safe they felt when they were at their school. Approximately 16% of students reported that they usually or never felt safe at school. Boys were significantly more likely to experience and perpetrate all forms of bullying. No significant gender differences were found with respect to acting in general more pro-socially or in feeling unsafe. Results from regression analyses employing multi-item measures of (i) victimisation and (ii) bullying others, independently predicted students reporting feeling less safe, after controlling for gender and grade level. Students reporting relatively high levels of pro-social behaviour also reported significantly higher level of safety. Implication of these findings for increasing the safety of students in the UAE schools are discussed

Characterization of fatigue properties of 3D printed polylactic acid

The goal of this research is to determine how tiredness behavior may be measured (PLA). A To A variety of technical data sets were S-N curves were chosen and statistically re-analyzed. as described in the following section, to generate a negative reference value reverse slope also an improved tolerance limit of 106 2 failure cycles. The average effect of stress on fatigue can be indicated via administering the highest level of stress achievable during the cycle, according to experimental data examined after treatment.Furthermore stress/strength study may be effectively performed until the printing orientation seems to possess minimal influence on PLA's general tiredness behavior. carried out via taking the printing orientation into account. A homogeneous, linearly elastic polymer is described. When acceptable experimental findings are not available, the paper explains how to conduct a fatigue evaluation (with a survival probability better than 95%). The study demonstrates how to do so via utilizing standard fatigue curves with a negative-inverse regression of 5.5 and a tolerance limit (2 106 cycles to failure) equivalent to 10% of the material's maximum σ_t

Designing a new architectural language for community centers in Jordan

Thesis (M. Arch.)--Massachusetts Institute of Technology, Dept. of Architecture, 1997.Includes bibliographical references (p. 105-108).The aim of this thesis is to develop a vocabulary of principles to be used in the design of future community centers in Jordan. Community centers provide the stage for bringing members of the community together to meet and discuss community issues, and for increasing their sense of community spirit which advances social and economic development. This thesis rethinks the present idea of a community center taking into account the changing social structure and culture, the regional climate and availability of local materials. The principles that evolved may be divided into two categories; spatial vocabulary, which focuses on the relationship and design of spaces that encourage interaction amongst members of the community; and character vocabulary, which focuses on the character reflected by the community center as being the heart of the community. This thesis was investigated through the process of redesigning a community center in one of the housing projects built by the government to house low-income families.by Dalia Osama Ali.M.Arch

Urinary Stoma Care Guidelines: The Effect on Patients' Self-efficacy and Incidence of Peristomal Complications After Permanent Urostomy

Background: Adaptation to the urinary stoma is difficult and need a collaboration of multi-disciplinary team including nurse ,urological physician and surgeon who may be in a powerful position to positively help such  patients to enhance thier self-efficacy, adapt to life with a stoma care and minimizing the associated complications.  Aim: This study aimed to evaluate the effect of urinary stoma care guidelines on patients' self-efficacy and peristomal complications after permanent urostomy. Design: A quasi experimental design. Setting: The study was conducted at urosurgery department and outpatient  urosurgery clinics  at Ain shames universty hospitals,Cairo, Egypt.. Sample: A purposive sample included 50 adult patients after permanent urostomy  and was divided randomly into 25 patients in the study group and 25 patients in the control group. Tools of data collection :I-Patient's structured interview questionnaire, II-Patient's  stoma care practice observational checklist, III- Pittman Ostomy Complications Severity Index (OCSI), IV-Ostomy complications risk factors assessment tool, V- Stoma Care Self-Efficacy Scale. Results: Regarding self-efficacy, 68.0% of the study group and 72.0% of the control group weren't confident pre- guidelines implementation. While, 3 months follow-up, 60.0% of the study group were fairly confident in contrast to 60.0% of the control group weren't confident with statistically significant difference. Concerning peristomal complications, leakage, peristomal dermatitis, stomal pain and stomal bleeding were the most common with statistically significant difference between the two groups 3 months follow up.Conclusions: Urinary stoma care guidelines affected positively on enhancing patients' self-efficacy and minimizing peristomal complications. Recommendations: furthur researches should be done to assess the risk factors for ostomy patient as predictors for peristomal complications occurance after urostomy and    subsequently an early management and preventable measures can be utilized as well as the role of wound ostomy nurse (WON) should be identified and activated in egypt through the Egyption Nursing Syndicate  as they play avital role in caring for ostomy patients. Keywords: Peristomal complications, permanent urostomy, Self-efficacy, urinary stoma care guideline

Three Dimensional (3D) Forensic Facial Reconstruction in an Egyptian Population using Computed Tomography Scanned Skulls and Average Facial Templates: A Study Examining Subjective and Objective Assessment Methods of 3D Forensic Facial Reconstructions

PhDForensic facial reconstruction can assist identification by reconstructing a face of the unknown person with the aim of its recognition by his/her family or friends. In the facial reconstruction approach adopted in this study, a 3D average face template was digitally warped onto a 3D scanned skull image. This study was carried out entirely on an Egyptian population, and was the first of its kind. Aims: This study aimed to demonstrate that 3D facial reconstructions using the novel methodology described could show significant resemblance to the faces corresponding to the persons in question when they were alive. Moreover, using techniques previously validated for facial reconstruction, the aim was to compare them to the method developed, and to assess approaches used to determine the accuracy of 3D facial reconstructions. Methods: Initially, a pilot study was conducted using a database of laser scanned skulls and faces. The faces were reconstructed using an average facial template generated by merging a number of faces of similar population, sex, and age. The applicability, as well as the main components of the facial reconstruction method, the single and average facial templates, and the facial soft tissue thickness measurements, were investigated. Furthermore, in the main study, the faces of computed tomography (CT) scanned heads of an Egyptian population were reconstructed using average facial templates. The accuracy of the reconstructed faces was assessed subjectively by face pool, and face resemblance tests, and objectively by measuring the surface distances between the real and reconstructed faces. In addition, a number of novel subjective and objective assessment methods were developed. These included assessment of individual facial regions using subjective resemblance scores, and objective surface distance comparisons. A new objective method, craniofacial anthropometry, was developed by taking and comparing direct measurements from the skull, and comparing the measurements from the real and reconstructed faces. The studied cases were ranked according to all subjective, and objective, tests, and statistically correlated. Results and Conclusions: The average facial templates showed a higher identification rate than the single face templates. The approach of facial reconstruction used in this thesis showed a comparable accuracy to many other facial reconstruction methods, yet was superior in terms of its applicability, transferability, and ease of use. In the face pool tests, the younger assessors were able to correctly identify the reconstructed faces better than older assessors. Furthermore, the identification rate by the forensic anthropology experts was higher than the non-experts. The former group showed the highest agreement between the observers in giving the resemblance scores. Although there was a significant rank correlation between the subjective and objective assessment tests, the subjective tests are influenced by the assessors’ subjective characteristics (e.g., age, professional experience), thus making objective assessment more reliable. However, in situations where subjective tests are used, it is better to use the face resemblance tests and consult forensic anthropologists. Also, Craniofacial Anthropometry, particularly the craniofacial angles, can successfully indicate the accuracy of the facial reconstructions. Importantly, this study shows that certain facial regions, particularly the cheek and the jaw, are more reliable than other areas in the subjective and objective assessment of the facial reconstructionEgyptian Ministry of Higher Education and the Egyptian Cultural Affairs and the Mission Sector, as well as the Egyptian cultural Counsellor and the staff of the Egyptian Cultural Centre and Educational Bureau in London, UK