Scientific Journal of King Faisal University最新文献_第7页

Prevalence of Pathogenic Bacteria on Face Masks from Wet Markets in Makkah during the COVID-19 Pandemic 2019冠状病毒病大流行期间麦加菜市场口罩上致病菌的流行情况

Scientific Journal of King Faisal University Pub Date : 2022-01-01 DOI: 10.37575/b/sci/220040

Mohammad Melebari, Tariq A Alpakistany, T. Taha, A. Alsalman

{"title":"Prevalence of Pathogenic Bacteria on Face Masks from Wet Markets in Makkah during the COVID-19 Pandemic","authors":"Mohammad Melebari, Tariq A Alpakistany, T. Taha, A. Alsalman","doi":"10.37575/b/sci/220040","DOIUrl":"https://doi.org/10.37575/b/sci/220040","url":null,"abstract":"The Coronavirus disease 2019 (COVID-19) pandemic compelled people worldwide to use face masks to limit the spread of the disease. Improper use of masks may increase the transmission of pathogenic bacteria, causing co-infection that may result in an increase in complications of COVID-19 and a rise in the death rate. This study aims to determine the presence of pathogenic bacteria on the surfaces of masks worn by workers while working at several markets (meat, fish, fruit, and vegetable markets) in Makkah, Saudi Arabia, during the COVID-19 pandemic. The pathogenic bacteria on the masks of some workers in different markets in Makkah were identified and confirmed by growth media and an automated system. Pathogenic bacteria were detected in 99% of the studied samples. The most commonly detected bacteria on masks were E. coli, followed by Staphylococcus epidermidis, and Staphylococcus aureus. A few samples included additional bacterial species, such as Klebsiella pneumoniae. To the best of our knowledge, this is the first study to investigate harmful bacteria on the masks of a random group of non-healthcare workers. Improper mask use by various populations might result in significant cross-contamination with pathobionts. KEYWORDS COVID-19, face masks, bacterial contamination, infection, hygiene, wet market","PeriodicalId":39024,"journal":{"name":"Scientific Journal of King Faisal University","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69895390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Developing Smart Learning Environments in Line with the Future Requirements of Artificial Intelligence: Saudi Universities 开发符合人工智能未来需求的智能学习环境:沙特大学

Scientific Journal of King Faisal University Pub Date : 2022-01-01 DOI: 10.37575/h/edu/210079

S. Alanazy

引用次数: 0

The Reality of Cybersecurity and its Challenges in Saudi Arabia 沙特阿拉伯的网络安全现状及其挑战

Scientific Journal of King Faisal University Pub Date : 2022-01-01 DOI: 10.37575/b/cmp/210075

S. Alsemairi

{"title":"The Reality of Cybersecurity and its Challenges in Saudi Arabia","authors":"S. Alsemairi","doi":"10.37575/b/cmp/210075","DOIUrl":"https://doi.org/10.37575/b/cmp/210075","url":null,"abstract":"Recent technological developments have led to an increasingly wide use of electronic devices, platforms and applications. These technologies are now an important factor in the digital transformations taking place in many governmental agencies. In parallel with these technological advancements, new cybercrime techniques have been developed, making them a complex and highly prioritized national security issue for many countries around the world. To address this challenge, the Saudi Arabian government, through a royal decree, has urged government agencies to create internal cybersecurity departments to safeguard their information and technical assets. This makes cybersecurity a critical element of the Kingdom’s 2030 Vision. This study aims to shed light on the reality of cybersecurity and its challenges in the Kingdom of Saudi Arabia. The researcher designed a questionnaire to measure several dimensions, including cybersecurity management, addressing cyber threats and risks, security techniques, and future (strategic) challenges. A sample of 98 IT employees working in different government agencies participated in this study. The results of the data analysis show that the level of cybersecurity against cyber threats and risks is high in the government agencies of Saudi Arabia. KEYWORDS Cybersecurity, cyberspace, cyber risks management, cyber threats and risks, cyber warfare","PeriodicalId":39024,"journal":{"name":"Scientific Journal of King Faisal University","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69892409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Design and Establishment of an Implementation to Simulate and Analyse the Tertiary Undulator of the FEL 自由电子激光器三阶波动器仿真分析实现的设计与建立

Scientific Journal of King Faisal University Pub Date : 2022-01-01 DOI: 10.37575/b/sci/220036

T. Al-Aish, H. Kamil

引用次数: 0

Islamic Education and its Consideration of Contemporary Matters: An Enquiry into School Curricula 伊斯兰教育及其对当代问题的思考:对学校课程的探讨

Scientific Journal of King Faisal University Pub Date : 2022-01-01 DOI: 10.37575/h/edu/220002

Hassan Shehata

引用次数: 2

Rheological Properties of Date Juice, Pomegranate Juice and their Concentrates: A Review 枣汁、石榴汁及其浓缩物流变学特性研究进展

Scientific Journal of King Faisal University Pub Date : 2022-01-01 DOI: 10.37575/b/agr/220004

A. Hobani, M. Othman, Mahmoud Elamshity

{"title":"Rheological Properties of Date Juice, Pomegranate Juice and their Concentrates: A Review","authors":"A. Hobani, M. Othman, Mahmoud Elamshity","doi":"10.37575/b/agr/220004","DOIUrl":"https://doi.org/10.37575/b/agr/220004","url":null,"abstract":"This review aims to investigate the rheological properties of date juice, pomegranate juice and their concentrates and to identify their flow behaviour. There are many rheological properties that have been studied, including viscosity, coefficient of flow behaviour index, type, and cohesion coefficient. Knowing the rheological properties of date juice and pomegranate and their concentrates is of paramount importance in various food processing operations. The flow behaviour index, activation energy and cohesion coefficient of date and pomegranate juices ranged between 0.605–0.988 and 0.776–1.45 J/mol, 1.9*104–3.3*104 and 32200–54430, 0.002–0.102 and 0.0013-0.075 Pa.sn, respectively. Both date juice and pomegranate juice with their distinct concentrations, have a non-Newtonian, semi-plastic behaviour that varies according to the type and variety of the fruit. There are several models have been used to describe the flow behaviour of date and pomegranate juices. The most important factors that affect the rheological properties and flow behaviour of the date and pomegranate juices are the temperature and the concentration of dissolved solids in the juice. Arrhenius equation is used to express the effect of temperature on the rheological properties of date and pomegranate juice and their various concentrates. Also, the apparent viscosity increases with rising concentration of dissolved solids and decreasing temperature. KEYWORDS Date juice, pomegranate juice, rheological properties, flow behaviour, cohesion coefficient","PeriodicalId":39024,"journal":{"name":"Scientific Journal of King Faisal University","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69891695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Conservative Treatment of Odontogenic Keratocyst Using a Specially Designed Acrylic Stent-Obturator: A Case Report 专用丙烯酸支架-闭孔器保守治疗牙源性角化囊肿1例

Scientific Journal of King Faisal University Pub Date : 2022-01-01 DOI: 10.37575/b/med/210078

Amjad Al Ateyah, Mohammed Al Ali, Manaf Al Habshi, Hussain Alshoulah, Abdulkader Abdulmadzhid, Mohammed Al Bahrani

引用次数: 0

Osteoclast Stimulatory Transmembrane Protein (OC‐STAMP): A Key Regulator in Osteoclast Fusion 破骨细胞刺激跨膜蛋白(OC‐STAMP):破骨细胞融合的关键调节因子

Scientific Journal of King Faisal University Pub Date : 2022-01-01 DOI: 10.37575/b/sci/210071

M. Alkuwayti

引用次数: 0

Reactivity Indices for the Coronene Nanocrystals and Their Derivatives: Modeling Approach 冕烯纳米晶体及其衍生物的反应性指数:建模方法

Scientific Journal of King Faisal University Pub Date : 2022-01-01 DOI: 10.37575/b/sci/220011

{"title":"Reactivity Indices for the Coronene Nanocrystals and Their Derivatives: Modeling Approach","authors":"","doi":"10.37575/b/sci/220011","DOIUrl":"https://doi.org/10.37575/b/sci/220011","url":null,"abstract":"The modeling approach was applied for the study of the reactivity of pristine and the substitution and absorption of doped coronene nanocrystals with nitrogen and boron under different cases. The reactivity indices of doped coronene molecules were investigated by adopting the Density Function Theory (DFT) code under the SIESTA and Hückel method schemes, which were performed using WebMO. We calculated reactivity indices that were placed into an orbital molecular frame. The results showed that the replacement and absorption of the effects of the doped coronene molecule with nitrogen increased the reactivity of the coronene nanocrystals. The pure coronene molecule is the molecule that has the largest energy gap. The hardness value of doped coronene substituted with a nitrogen atom decreases. The magnitude of chemical potential and electrophilicity for doped coronene with a nitrogen molecule has higher values than all compound cases studied. Moreover, the reactivity indices for the para position are low, so the compound will be less stable and highly reactive compared to the other positions. Therefore, substitution and absorption of doped coronene nanocrystals with nitrogen, and also the para position for doping with nitrogen and boron cases, will be a candidate for studying reactivity in the future.","PeriodicalId":39024,"journal":{"name":"Scientific Journal of King Faisal University","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69895149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Appropriate Grammatical Topics for Non-Arabic Speakers 适合非阿拉伯语使用者的语法主题

Scientific Journal of King Faisal University Pub Date : 2022-01-01 DOI: 10.37575/h/lng/220015

Mohammed Alluhaybi

{"title":"Appropriate Grammatical Topics for Non-Arabic Speakers","authors":"Mohammed Alluhaybi","doi":"10.37575/h/lng/220015","DOIUrl":"https://doi.org/10.37575/h/lng/220015","url":null,"abstract":"The aim of this research is to determine appropriate grammatical topics for advanced level learners of Arabic as a second language and measure their mastery of them. In this vein, the descriptive method is applied, as it seems to be the most appropriate one to meet the aims of the study. First, the researcher prepared a questionnaire to determine the appropriate grammatical topics for those learners based on several sources. The questionnaire resulted in 16 topics. Accordingly, the researcher constructed a test to measure the extent to which students were familiar with these topics. The test was applied to a sample of fourth-level students at the Arabic Language Institute for Speakers of Other Languages at King Abdul Aziz University. The total number of students was 94, and the results show that their familiarity was high in 10 topics, average in 3 topics, and low in the other 3 topics. The research recommended that these 16 topics should be included in the grammatical curricula for advanced level Arabic learners. Moreover, there should be mechanisms to prevent overlap and recurrence of these topics in the curricula. The research also suggested applying similar studies to beginner and intermediate learners to prepare lists of topics that reflect their levels in all linguistic aspects. KEYWORDS Grammatical topics, language learning, language proficiency, learning difficulties, learning skills, second language","PeriodicalId":39024,"journal":{"name":"Scientific Journal of King Faisal University","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79003471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0