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Item Restricted .................(Saudi Digital Library) نازك علي آل سعيد; ..........324 0Item Restricted 1 Evaluation of the expression of microRNAs, with an emphasis on microRNA-155 and miR-155*, in the serum of patients post haematopoietic stem cell transplantation and their association with acute graft versus host disease.(Saudi Digital Library) Osama Ali M Alsuraihi; Prof. Anne Dickinson154 0Item Restricted 1 PREDICTION OF SOLAR IRRADIANCE FROM WEATHER DATA USING MACHINE LEARNINGJOMANAH ALI ABDULAZIZ ALHAMIDI; Dr Alessandro CheccoA main aim of this study is to predict solar irradiance as solar power generation metrics. In order to do that, multiple machine learning algorithms are applied to data collected from a network of solar and wind resource monitoring stations and weather data in Saudi Arabia42 0Item Restricted 1 THE DEVELOPMENT OF ENGLISH VOCABULARY AMONG SAUDI TWITTER USERSSALWA NASSER JUBRAN HURAYSI; Dr.Ruth PageTwitter is a prominent micro-blogging platform among Saudi people, which indicates that Saudi users are now constantly engaged with thousands of native English speakers as well as other English as foreign language students and teachers. This research sheds light on the use of Twitter by Saudi users to determine their improvement of English vocabulary. The study examined how participants’ social interactions on Twitter can support second language vocabulary learning as well as the factors that influenced their decision to use Twitter to enhance their second language learning. The purpose of this research is to examine how Saudi users have adapted to Twitter and how they use it as an English language learning tool. As a theoretical framework, the researcher employed Vygotsky’s socio-cultural theory and zone of proximal development model, according to which when a learner is in the zone of proximal development for a specific assignment, offering the necessary support provides enough of a “boost” for the learner to complete the task independently via social interaction. To this end, 63 Saudi Twitter users with various levels of education were selected. Their ages ranged from 18–40 years old, and they were all likely to be of Arab descent. Based on a mixed-method approach, the data were collected through survey questionnaires. This mixed-methods study, which included survey questionnaires, examined the use of Twitter for educational reasons, with a focus on improving English vocabulary. An open and close-ended survey questionnaire was used to collect quantitative data from the selected sample. Survey questionnaire consisted of three parts. The first part addressed the demographic information, such as age, academic ranking, years of exposure to the English language, and study level of the participants. The second subsection consisted of open-ended questions to acquire in-depth, detailed data about the users’ perceptions of their English learning experiences using Twitter. The third subsection consisted of five Likert scale questions to investigate if they learned new vocabulary by Twitter, if they were confident in using English on Twitter, and if Twitter helped them to increase their knowledge of English vocabulary. The perceived attributes of Twitter were evaluated using a five-point Likert-type scale ranging from strongly agree to strongly disagree. The results revealed that Twitter had a positive impact, improving English vocabulary by 82.5% in. Twitter motivated users to communicate confidently with native speakers, with 63% scored in total. These findings can be expanded by more experimental research to assess how Twitter can be successfully used as a teaching tool in English language learning classrooms in Saudi Arabia and other countries. The findings suggest that Twitter and other social networking sites can be used as English language learning tools. Several implications and suggestions for teachers, policy makers, and scholars are discussed.49 0Item Restricted (1) CREATIVITY IN THE FADING ISLAMIC EMPIRE. (2) EFFECTS OF ARAB- ISRAELI CONFRONTATION ON SAUDI POETRY. (3) THE WAHHABIYA OF ARABIA - THE MAHDIYA OF THE SUDAN.(Saudi Digital Library) MUHAMMAD M. ABAHSAIN52 0Item Restricted 13 0Item Restricted 10 0Item Restricted (1) THE PROCESS OF RURAL COMMERCIALIZATION IN NIGERIA AND SENEGAL: THE CASE OF PEANUT PRODUCTION. (2) ISLAM IN EAST AFRICA.(Saudi Digital Library) MOHAMMAD ABDUL-KAREIM HABIB10 0Item Restricted 1+1 Numerical Relativity: The Gravitational Collapse of a Massless Scalar FieldRAWAN SAUD SULTAN ALRAYES; Dr Eugene LimThis paper numerically solves the Einstein’s field equations in the 1+1D formalism for a spherically symmetric massless scalar field with a Gaussian configuration. The initial amplitude of the scalar field is varied to find that with an initial value of φ0 = 0.001 no collapse occurs, while for the case of φ0 = 0.002 the field collapses into a black hole.18 0Item Restricted 1- CHARACTERIZING THE PERFORMANCE OF AMALGAM BONDING AT VARIOUS INTERFACES. 2- EFFECT OF OCCLUSAL LOAD CYCLING ON THE MARGINAL INTEGRITY OF ADHESIVE CLASS V RESTORATIONS.(Saudi Digital Library) YOUSEF ABDULRAHMAN H. KHODAIR6 0Item Restricted 1-D Fourier Ptychographic Microscopy(Saudi Digital Library) MOHAMMED SAADI TURKEY ALOTAIBI; Dr. Luis Grave de Peralta0 0Item Restricted 27 0Item Restricted 4 0Item Restricted 1. Which opportunities provided by cryptocurrencies are relevant for regulatory bodies? 2. What are the threats and barriers to the regulation of cryptocurrencies based on their inherent characteristics?(Saudi Digital Library) DIMA KHALID ALEIDI; James Cullen13 0Item Restricted 100% RENEWABLES BY 2020 IN SCOTLANDOSAMA MUSAED ALGHAMDI; neil wightAccording to the Scottish government and enforcing the climate act 2009. The Scottish government aims to rely on renewable resources 100% by 2020. This statement clarifies its target by stating the government aim to produce their electricity demand via renewable resources. But in this assignment that might not be possible due to the intermittency of the renewable resources.9 0Item Restricted 1001 Nights Storybook for children(Saudi Digital Library) ROAA FAISAL A ALHARBI; Charlie Cullen13 0Item Restricted 13C, 15N and 31P NMR study of the scrambling and the redox reactions of some gold(I) complexes.(Saudi Digital Library) Muhammad Naseem Akhtarتم دراسة تفاعل العقاقير المثبطة للالتهابات المفصلية مع ثيويوديا وسلينويوريا وأميدازولين -2- سيلون ومجموعات -SCN و -SeCN في المحاليل المائية باستعمال مطيافية الرنين النووي المغناطيسي 13C ز وقد لوحظ أن الثيوريا تكون مركب بنسب 1 : 1 مع (Autm) n و -SCN وتسبب ازدياد بلمرة (Autm) n بينما تسبب السليتويوريا والأميدازوليدين -2- سيلون و -SeCN تفاعلات أكسدة مع (Autm) n ، ويتكون نتيجة لذلك الذهب المعدنية والسلينويوم المعدني وكبريتيد الثيوماليك . اختبرت خصائص اللزوجة والكتلة الالكترونية ومطيافية الرنين النووي المغناطيسي 13C و 15N لكابنوبريل الذهب البولمري (Aucap) n فلوحظ أن درجة التبلمر في (Aucap) n أعلى منها في (Autm) n كما أظهرت مطيافية الكتلفة وجود مسارين في طريقة تحطم (Aucap) n . كما لوحظ أيضاً أن (Aucap) n تكون مركب بنسبة 1 : 1 مع الثيوريا بينما يحدث تفاعل أكسدة مع السيلينويوديا و (-SeCN) لانتاج ذهب معدني وسيلينيوم معدني وكبريتيد الكابتوبريل . وتفاعلات التبادل لمركبات (R3PAu13C15N) لتكون + [(R3P)2Au] و -[Au(13C15N)2] تم دراستها باستخدام مطيافية الرنين النووي المغناطيسي 31P و 15N و 13C في مجموعة من المركبات كما تم دراسة ثابت الازدواج (J) في هذه المركبات كالتالي : 1J(31P-13C) و 1J(13C-15N) و 2J(31P-13C) و 3J(31P-15N) ولوحظ اختلافات متعددة تعتمد على قاعدية متصلة لافوسفين . وقد قيست الطاقة الحرة في هذه المركبات باستخدام التحليل الشكلي المظهري) لمطايفية الرنين النووي المغناطيسي 31P . كما درس تأثير متصلات الفوسفين على قاعدية في مركبات R3PAuS13C15N باستخدام الأشعة تحت الحمراء وبمطيافية الرنين النووي 31P و 15N و 13C . كما تم ملاحظة أنه على خلاف مركبات R3PAu13C15N فإن مركبات R3PAuS13C15N لا تقوم بتفاعلات التبادل .21 0Item Restricted 15N and 13C NMR Studies of the Interaction of Cyanide Ion With Gold(I) Drugs(Saudi Digital Library) Ibrahim Hamed Ghazi15N and 13C NMR Studies of the Interaction of Cyanide Ion With Gold(I) Drugs2 0Item Restricted 18F-FDG PET/CT-based Radiomics for the Prediction of Radiochemotherapy Treatment Outcomes of Cervical Cancer(Saudi Digital Library) BADERALDEEN ABDULMAJEED M ALTAZI; Dr. Eduardo G. Moros1 0Item Restricted 1D MODEL FOR FLOWIN THE PULMONARY AIRWAY SYSTEM(Saudi Digital Library) Eyman Salem Alahmadi6 0