Pub Date : 2021-10-20DOI: 10.29117/quarfe.2021.0020
S. Rajendran, A. Fahad, FN Sadooni, Has Al-Kuwari, P. Vethamony, O. Anisimov, S. Nasir, J. Al-Khayat, H. Govil, VO Seegobin
An Oil Spill Index (OSI = (B3+B4)/B2) was developed and applied to Sentinel-2 optical satellite data of the European Space Agency (ESA) to map marine oil spills using spectral absorption characters of spectral bands of the Sentinel-2. The potential application of OSI and derived indices [i. (5+6)/7, (3+4)/2, (11+12)/8 and ii. 3/2, (3+4)/2, (6+7)/5] were demonstrated to the oil spills that occurred off Mauritius, Indian Ocean, on August 06, 2020, and Norilsk region, Russia on May 29, 2020, and the results were published in the peer-reviewed research journals. Recently (August 19, 2021), our methodology was recognized by the Sentinel-Hub (a repository of custom scripts) https://custom-scripts.sentinel-hub.com/sentinel-2/oil-spill-index/ for OSI calculation. We validated the remote sensing results with the drone images taken during the incident. Our OSI index is the first to be applied to Sentinel-2 optical data to map oil spills. We proved the potential of indices and the capability of Sentinel sensors to detect, map, monitor, and assess the oil spill, which can be used for emergency preparedness of oil spills.
{"title":"Oil Spill Index (OSI) to Sentinel-2 Satellite Data: QU in International Contribution","authors":"S. Rajendran, A. Fahad, FN Sadooni, Has Al-Kuwari, P. Vethamony, O. Anisimov, S. Nasir, J. Al-Khayat, H. Govil, VO Seegobin","doi":"10.29117/quarfe.2021.0020","DOIUrl":"https://doi.org/10.29117/quarfe.2021.0020","url":null,"abstract":"An Oil Spill Index (OSI = (B3+B4)/B2) was developed and applied to Sentinel-2 optical satellite data of the European Space Agency (ESA) to map marine oil spills using spectral absorption characters of spectral bands of the Sentinel-2. The potential application of OSI and derived indices [i. (5+6)/7, (3+4)/2, (11+12)/8 and ii. 3/2, (3+4)/2, (6+7)/5] were demonstrated to the oil spills that occurred off Mauritius, Indian Ocean, on August 06, 2020, and Norilsk region, Russia on May 29, 2020, and the results were published in the peer-reviewed research journals. Recently (August 19, 2021), our methodology was recognized by the Sentinel-Hub (a repository of custom scripts) https://custom-scripts.sentinel-hub.com/sentinel-2/oil-spill-index/ for OSI calculation. We validated the remote sensing results with the drone images taken during the incident. Our OSI index is the first to be applied to Sentinel-2 optical data to map oil spills. We proved the potential of indices and the capability of Sentinel sensors to detect, map, monitor, and assess the oil spill, which can be used for emergency preparedness of oil spills.","PeriodicalId":9295,"journal":{"name":"Building Resilience at Universities: Role of Innovation and Entrepreneurship","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88476926","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}
Pub Date : 2021-10-20DOI: 10.29117/quarfe.2021.0189
إسراء علي حسين
يهدف البحث الحالي إلى التعرف على العلاقة بين تصور مقترح لعلاج معرفي سلوكي لذوي الإعاقة وبين المشاركة الوالدية، وتم استخدام المنهج الوصفي الارتباطي، واستخدام مقياس التعاون والشراكة بين الأسرة والمدرسة كأداة للبحث، وتكونت العينة من عشرة أفراد في المجتمع القطري، خمسة من الذكور، وخمسة من الإناث. وأظهرت نتائج البحث وجود علاقة ترابطية طردية بين نجاح التصور المقترح لبرنامج علاجي معرفي سلوكي لدى ذوي الإعاقة وبين المشاركة الوالدية، كما أظهرت وجود تأثير إيجابي للبرنامج العلاجي المعرفي السلوكي في حل المشكلات لدى ذوي الإعاقة، أيضًا أشارت إلى وجود تعاون ما بين الأسرة والمدرسة في المجتمع القطري.
{"title":"العلاقة بين تصور مقترح لبرنامج علاجي معرفي سلوكي لأطفال ذوي الإعاقة والمشاركة الوالدية في المجتمع القطري","authors":"إسراء علي حسين","doi":"10.29117/quarfe.2021.0189","DOIUrl":"https://doi.org/10.29117/quarfe.2021.0189","url":null,"abstract":"يهدف البحث الحالي إلى التعرف على العلاقة بين تصور مقترح لعلاج معرفي سلوكي لذوي الإعاقة وبين المشاركة الوالدية، وتم استخدام المنهج الوصفي الارتباطي، واستخدام مقياس التعاون والشراكة بين الأسرة والمدرسة كأداة للبحث، وتكونت العينة من عشرة أفراد في المجتمع القطري، خمسة من الذكور، وخمسة من الإناث. وأظهرت نتائج البحث وجود علاقة ترابطية طردية بين نجاح التصور المقترح لبرنامج علاجي معرفي سلوكي لدى ذوي الإعاقة وبين المشاركة الوالدية، كما أظهرت وجود تأثير إيجابي للبرنامج العلاجي المعرفي السلوكي في حل المشكلات لدى ذوي الإعاقة، أيضًا أشارت إلى وجود تعاون ما بين الأسرة والمدرسة في المجتمع القطري.","PeriodicalId":9295,"journal":{"name":"Building Resilience at Universities: Role of Innovation and Entrepreneurship","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81973606","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}
Pub Date : 2021-10-20DOI: 10.29117/quarfe.2021.0048
M. Abdelrazeq, Ahmad K. Sleiti, M. Azizur Rahman, A. Barooah
Multiphase flow in pipelines is of great importance and broadly used in several industries for various applications. A multiphase flow is a complex physical phenomenon where more than one phase occurs. In oil and gas exploration process, more attention has been given to the well drilling operation to fulfill the extreme high demand of natural gas. Well drilling operation and technology has transformed to ultra-high pressure and high temperature reservoirs. This transformation has negatively impacted the drilling conditions and the safety of the drilling rig, as a gas kick would become more likely to occur at these extreme conditions. The resulting uncontrolled gas kicks may ignite and explode causing dramatic blowouts associated with very serious consequences, including financial losses, damaging the environment, and loss of personnel’s lives. The early detection of a gas kick is therefore essentially needed for timely response with appropriately well control measures.
{"title":"Experimental Investigations of Gas Kick for Single and Two-Phase Gas-liquid Flow in near Horizontal Wells","authors":"M. Abdelrazeq, Ahmad K. Sleiti, M. Azizur Rahman, A. Barooah","doi":"10.29117/quarfe.2021.0048","DOIUrl":"https://doi.org/10.29117/quarfe.2021.0048","url":null,"abstract":"Multiphase flow in pipelines is of great importance and broadly used in several industries for various applications. A multiphase flow is a complex physical phenomenon where more than one phase occurs. In oil and gas exploration process, more attention has been given to the well drilling operation to fulfill the extreme high demand of natural gas. Well drilling operation and technology has transformed to ultra-high pressure and high temperature reservoirs. This transformation has negatively impacted the drilling conditions and the safety of the drilling rig, as a gas kick would become more likely to occur at these extreme conditions. The resulting uncontrolled gas kicks may ignite and explode causing dramatic blowouts associated with very serious consequences, including financial losses, damaging the environment, and loss of personnel’s lives. The early detection of a gas kick is therefore essentially needed for timely response with appropriately well control measures.","PeriodicalId":9295,"journal":{"name":"Building Resilience at Universities: Role of Innovation and Entrepreneurship","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72714100","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}
Pub Date : 2021-10-20DOI: 10.29117/quarfe.2021.0144
Alanood Al-Shahwani, Dana Arafeh, Daniah Al-Asmar, H. Bawadi, Suhad Daher-Nashif, Joyce Moawad
Depression is associated with several chronic diseases such as diabetes. Diabetes is a long-term health disorder that have many health complications such as mental health problems, if left untreated. Our study aimed to determine the prevalence of depression among Qatari patients with diabetes, and to investigate the potential determinants of depression. Our results revealed that the prevalence of depression among the target population was 15.4%. Females, younger adults, smokers and patients with higher education had more depressive symptoms.
{"title":"Mental health problems in adults with diabetes: prevalence and potential determinants","authors":"Alanood Al-Shahwani, Dana Arafeh, Daniah Al-Asmar, H. Bawadi, Suhad Daher-Nashif, Joyce Moawad","doi":"10.29117/quarfe.2021.0144","DOIUrl":"https://doi.org/10.29117/quarfe.2021.0144","url":null,"abstract":"Depression is associated with several chronic diseases such as diabetes. Diabetes is a long-term health disorder that have many health complications such as mental health problems, if left untreated. Our study aimed to determine the prevalence of depression among Qatari patients with diabetes, and to investigate the potential determinants of depression. Our results revealed that the prevalence of depression among the target population was 15.4%. Females, younger adults, smokers and patients with higher education had more depressive symptoms.","PeriodicalId":9295,"journal":{"name":"Building Resilience at Universities: Role of Innovation and Entrepreneurship","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73018985","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}
Pub Date : 2021-10-20DOI: 10.29117/quarfe.2021.0204
مريم المري, فاطمة أحمد علي, معاذ هزاع علي الزعبي
استهدفت الدراسة الحالية التعرف على أثر إقصاء النظريات الإسلامية عن المقررات الدراسية لتخصص سياسات وتخطيط وتنمية على الهوية القطرية للطلبة القطريين، واستخدمت الدراسة المنهج الوصفي التحليلي ومقابلات تم تطبيقها على عينة (6) أساتذة من جامعة قطر وجامعة حمد بن خليفة، و(8) طالبات من قسم شؤون دولية بجامعة قطر وطالب واحد أيضًا من قسم شؤون دولية بجامعة قطر، وأظهرت النتائج أن إقصاء النظريات الإسلامية عن المقررات الدراسية لتخصص سياسات وتخطيط وتنمية يؤثر على الهوية القطرية للطلبة القطريين؛ مما يؤكد على ضرورة إدماج التعليم وإضفاء الصبغة الإسلامية.
{"title":"فصل النظريات الإسلامية عن المقررات الدراسية وأثرها على الهوية القطرية: دراسة حالة - تخصص سياسات وتخطيط وتنمية في جامعة قطر","authors":"مريم المري, فاطمة أحمد علي, معاذ هزاع علي الزعبي","doi":"10.29117/quarfe.2021.0204","DOIUrl":"https://doi.org/10.29117/quarfe.2021.0204","url":null,"abstract":"استهدفت الدراسة الحالية التعرف على أثر إقصاء النظريات الإسلامية عن المقررات الدراسية لتخصص سياسات وتخطيط وتنمية على الهوية القطرية للطلبة القطريين، واستخدمت الدراسة المنهج الوصفي التحليلي ومقابلات تم تطبيقها على عينة (6) أساتذة من جامعة قطر وجامعة حمد بن خليفة، و(8) طالبات من قسم شؤون دولية بجامعة قطر وطالب واحد أيضًا من قسم شؤون دولية بجامعة قطر، وأظهرت النتائج أن إقصاء النظريات الإسلامية عن المقررات الدراسية لتخصص سياسات وتخطيط وتنمية يؤثر على الهوية القطرية للطلبة القطريين؛ مما يؤكد على ضرورة إدماج التعليم وإضفاء الصبغة الإسلامية.","PeriodicalId":9295,"journal":{"name":"Building Resilience at Universities: Role of Innovation and Entrepreneurship","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79585027","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}
Pub Date : 2021-10-20DOI: 10.29117/quarfe.2021.0154
Noor Al-Atieh, Salma E. Ahmad, Hanan Nazar, A. Ouhtit
Breast cancer (BC), a worldwide health issue, is the most common malignant cancer in women in Gulf region, including the State of Qatar. Unfortunately, malignant tumors has the capability to metastasis, which involves both migration and invasion of cancer cells which are the most threatening aspects of cancer (McSherry et al., 2007). Consequently, researchers have concentrated on Complementary and Alternative medicine (CAM) modalities, as conventional medicine has been facing various challenges such as; poor understanding of the mechanisms with BC proliferation and invasion within various groups of patients, drug resistance, and the failure of current therapies to completely cure the disease. A significant CAM method have been raised which is the treatment with herbs and extracts derived from seeds, leaves, fruits and roots of plants; each of these invariably represents a combination of several bioactive compounds. Our biofuel has provided us with a crude extract of a microalgae coded as T1 that consist of carotenoids, chlorophyll a, and chlorophyll b. Carotenoids is a bioactive molecule that inhibits the proliferation, migration, invasion and induce apoptosis to tumor cells.
乳腺癌是一个全球性的健康问题，是海湾地区(包括卡塔尔国)妇女最常见的恶性癌症。不幸的是，恶性肿瘤具有转移能力，包括癌细胞的迁移和侵袭，这是癌症最具威胁性的方面(McSherry et al.， 2007)。因此，研究人员将重点放在补充和替代医学(CAM)模式上，因为传统医学面临着各种挑战，例如;对不同患者群体中BC增殖和侵袭的机制了解不足，耐药，以及目前治疗方法无法完全治愈该疾病。提出了一种重要的CAM方法，即用植物种子、叶、果和根提取的草药和提取物进行处理;每一种都是几种生物活性化合物的组合。我们的生物燃料为我们提供了一种编码为T1的微藻的粗提取物，它由类胡萝卜素、叶绿素a和叶绿素b组成。类胡萝卜素是一种生物活性分子，可以抑制肿瘤细胞的增殖、迁移、侵袭和诱导凋亡。
{"title":"Anti-cancer properties of Microalgae (T1) Extract in Breast Cancer Cell Lines","authors":"Noor Al-Atieh, Salma E. Ahmad, Hanan Nazar, A. Ouhtit","doi":"10.29117/quarfe.2021.0154","DOIUrl":"https://doi.org/10.29117/quarfe.2021.0154","url":null,"abstract":"Breast cancer (BC), a worldwide health issue, is the most common malignant cancer in women in Gulf region, including the State of Qatar. Unfortunately, malignant tumors has the capability to metastasis, which involves both migration and invasion of cancer cells which are the most threatening aspects of cancer (McSherry et al., 2007). Consequently, researchers have concentrated on Complementary and Alternative medicine (CAM) modalities, as conventional medicine has been facing various challenges such as; poor understanding of the mechanisms with BC proliferation and invasion within various groups of patients, drug resistance, and the failure of current therapies to completely cure the disease. A significant CAM method have been raised which is the treatment with herbs and extracts derived from seeds, leaves, fruits and roots of plants; each of these invariably represents a combination of several bioactive compounds. Our biofuel has provided us with a crude extract of a microalgae coded as T1 that consist of carotenoids, chlorophyll a, and chlorophyll b. Carotenoids is a bioactive molecule that inhibits the proliferation, migration, invasion and induce apoptosis to tumor cells.","PeriodicalId":9295,"journal":{"name":"Building Resilience at Universities: Role of Innovation and Entrepreneurship","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80854161","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}
Pub Date : 2021-10-20DOI: 10.29117/quarfe.2021.0197
فاطمة علي المالكي, أريج عصام برهم
هدفت الدراسة الحالية إلى الكشف عن أثر برنامج تدريبي قائم على الاستقصاء وحل المشكلات على الأداء التدريسي لمعلمي العلوم، وقد تناولت الدراسة الحالية عدة مجالات؛ شملت تخطيط وتنفيذ وتقويم الدروس بالإضافة إلى النمو المهني للمعلم وبيئة التعليم والتعلم. بلغ عدد المشاركين في الدراسة (8) معلمات علوم بالمرحلة الابتدائية في المدارس الحكومية في دولة قطر، بنسبة (50%) تقريبًا من أصل (17) معلمة ممن حضرن البرنامج التدريبي. استخدم الباحثون استمارة الملاحظة الصفية لقياس الأداء التدريسي لمعلمي العلوم قبل/وبعد تطبيق البرنامج التدريبي القائم على كيفية التخطيط والتطبيق لأنشطة التعلم القائم على الاستقصاء وحل المشكلات. كما استخدمت الأساليب الإحصائية الوصفية، المتمثلة في حساب المتوسطات الحسابية والانحرافات المعيارية لدرجات الأداء التدريسي للمعلمين في استمارة الملاحظة الصفية. أظهرت نتائج الدراسة وجود أثر إيجابي دال إحصائيًا للبرنامج التدريبي القائم على الاستقصاء وحل المشكلات على الأداء التدريسي لمعلمي العلوم بشكل عام. وبشكل خاص، أظهرت نتائج الدراسة وجود فروق ذات دلالة إحصائية تعزى لأثر البرنامج التدريبي في مجال التقويم الصفي حيث جاء في المرتبة الأولى، تلاها في المرتبة الثانية مجال التخطيط للدروس، وجاء في المرتبة الثالثة مجال التنفيذ للدروس، كما احتل النمو المهني المرتبة الرابعة، بينما لم تظهر الدراسة فروقًا ذات دلالة إحصائية في مجال بيئة التعليم والتعلم. وقد قدمت الدراسة الحالية عددًا من التوصيات في ضوء نتائجها؛ حيث أوصت بتنفيذ البرنامج التدريبي القائم على الاستقصاء وحل المشكلات لمعلمي العلوم في صفوف المرحلة الابتدائية، وكذلك تعزيز التعاون بين مركز التدريب والتطوير التربوي في وزارة التعليم والتعليم العالي، والمركز الوطني للتطوير التربوي في جامعة قطر.
{"title":"أثر برنامج تدريبي قائم على الاستقصاء وحل المشكلات على الأداء التدريسي لمعلمي العلوم","authors":"فاطمة علي المالكي, أريج عصام برهم","doi":"10.29117/quarfe.2021.0197","DOIUrl":"https://doi.org/10.29117/quarfe.2021.0197","url":null,"abstract":"هدفت الدراسة الحالية إلى الكشف عن أثر برنامج تدريبي قائم على الاستقصاء وحل المشكلات على الأداء التدريسي لمعلمي العلوم، وقد تناولت الدراسة الحالية عدة مجالات؛ شملت تخطيط وتنفيذ وتقويم الدروس بالإضافة إلى النمو المهني للمعلم وبيئة التعليم والتعلم. بلغ عدد المشاركين في الدراسة (8) معلمات علوم بالمرحلة الابتدائية في المدارس الحكومية في دولة قطر، بنسبة (50%) تقريبًا من أصل (17) معلمة ممن حضرن البرنامج التدريبي. استخدم الباحثون استمارة الملاحظة الصفية لقياس الأداء التدريسي لمعلمي العلوم قبل/وبعد تطبيق البرنامج التدريبي القائم على كيفية التخطيط والتطبيق لأنشطة التعلم القائم على الاستقصاء وحل المشكلات. كما استخدمت الأساليب الإحصائية الوصفية، المتمثلة في حساب المتوسطات الحسابية والانحرافات المعيارية لدرجات الأداء التدريسي للمعلمين في استمارة الملاحظة الصفية. أظهرت نتائج الدراسة وجود أثر إيجابي دال إحصائيًا للبرنامج التدريبي القائم على الاستقصاء وحل المشكلات على الأداء التدريسي لمعلمي العلوم بشكل عام. وبشكل خاص، أظهرت نتائج الدراسة وجود فروق ذات دلالة إحصائية تعزى لأثر البرنامج التدريبي في مجال التقويم الصفي حيث جاء في المرتبة الأولى، تلاها في المرتبة الثانية مجال التخطيط للدروس، وجاء في المرتبة الثالثة مجال التنفيذ للدروس، كما احتل النمو المهني المرتبة الرابعة، بينما لم تظهر الدراسة فروقًا ذات دلالة إحصائية في مجال بيئة التعليم والتعلم. وقد قدمت الدراسة الحالية عددًا من التوصيات في ضوء نتائجها؛ حيث أوصت بتنفيذ البرنامج التدريبي القائم على الاستقصاء وحل المشكلات لمعلمي العلوم في صفوف المرحلة الابتدائية، وكذلك تعزيز التعاون بين مركز التدريب والتطوير التربوي في وزارة التعليم والتعليم العالي، والمركز الوطني للتطوير التربوي في جامعة قطر.","PeriodicalId":9295,"journal":{"name":"Building Resilience at Universities: Role of Innovation and Entrepreneurship","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78082955","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}
Pub Date : 2021-10-20DOI: 10.29117/quarfe.2021.0004
Amani Hassanein, A. Khan, R. Shakoor, R. Kahraman
Corrosion is one of the challenging issues faced by many industries, causing substantial economic losses every year due to the degradation of metallic parts, raising many safety concerns. Therefore, it is of utmost relevance to developing strategies that can repair the damaged part of the coatings to protect the base metal and restrict the initiation of corrosion. Towards this direction, the concept of double-layered polymeric coatings (DLPCs) for corrosion protection is introduced as a novel strategy to bring different healing functionalities into coating matrices. The developed DLPCs are composed of a top layer containing 5wt. % of melamine urea-formaldehyde microcapsules (MUFMC) encapsulating boiled linseed oil (self-healing agent), and bottom layer having 3wt. % benzotriazole (corrosion inhibitor) loaded into halloysite nanotubes (HNTs). The DLPCs were developed on mild steel substrate employing a doctor blade technique. The electrochemical analyses indicates that the DLPCs demonstrate improved corrosion resistant properties. This improved performance can be ascribed to the efficient triggering of the individual carriers in the quarantined matrix, resulting in enhanced corrosion efficiency of the DLPCs. The promising characteristics of DLPCs make them suitable for many potential industrial applications.
{"title":"Double layered Polymeric Coatings for Corrosion Protection of Steel","authors":"Amani Hassanein, A. Khan, R. Shakoor, R. Kahraman","doi":"10.29117/quarfe.2021.0004","DOIUrl":"https://doi.org/10.29117/quarfe.2021.0004","url":null,"abstract":"Corrosion is one of the challenging issues faced by many industries, causing substantial economic losses every year due to the degradation of metallic parts, raising many safety concerns. Therefore, it is of utmost relevance to developing strategies that can repair the damaged part of the coatings to protect the base metal and restrict the initiation of corrosion. Towards this direction, the concept of double-layered polymeric coatings (DLPCs) for corrosion protection is introduced as a novel strategy to bring different healing functionalities into coating matrices. The developed DLPCs are composed of a top layer containing 5wt. % of melamine urea-formaldehyde microcapsules (MUFMC) encapsulating boiled linseed oil (self-healing agent), and bottom layer having 3wt. % benzotriazole (corrosion inhibitor) loaded into halloysite nanotubes (HNTs). The DLPCs were developed on mild steel substrate employing a doctor blade technique. The electrochemical analyses indicates that the DLPCs demonstrate improved corrosion resistant properties. This improved performance can be ascribed to the efficient triggering of the individual carriers in the quarantined matrix, resulting in enhanced corrosion efficiency of the DLPCs. The promising characteristics of DLPCs make them suitable for many potential industrial applications.","PeriodicalId":9295,"journal":{"name":"Building Resilience at Universities: Role of Innovation and Entrepreneurship","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80962243","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}
Pub Date : 2021-10-20DOI: 10.29117/quarfe.2021.0108
Nancy Zaghloul, A. Awaisu, Ahmed A. Mahfouz, Sumaya Al Saadi, H. Elewa
Background: Type 2 diabetes mellitus (T2DM) represents a growing health challenge in Qatar and worldwide. T2DM is associated with a high risk of cardiovascular (CV) morbidity and mortality, and progression of renal disease. Sodium glucose co-transporter 2 inhibitors (SGLT2is) are the most recently approved class of glucose lowering medications (GLMs). To date, there is a limited knowledge about the adoption of SGLT2is by clinicians compared to other oral GLMs in Qatar and Middle East and North Africa (MENA) region. Accordingly, this proposed study aims to explore the trends in SGLT2is use compared to other oral GLMs in Qatar from 2016 to 2020. Methods: This is a descriptive, retrospective cross-sectional study where information on all oral GLMs prescriptions dispensed as in- or out-patient from 2016 to 2020 in all Hamad Medical Corporation (HMC) hospitals were collected. Outcomes included the number and relative frequency of quarterly prescriptions of different oral GLMs classes [metformin, sulfonylureas (SUs), dipeptidyl peptidase 4 inhibitors (DPP-4is), thiazolidinediones (TZDs), meglitinides (MEGs), α-glucosidase inhibitors (AGIs), and SGLT2is] from 2016 to 2020. Results: Overall, the prescription rate of GLMs increased during the last five years. SGLT2is use increased over the years after being introduced to the formulary in 2017, replacing SUs which exhibited significant decline between 2017 and 2020. There was a slight reduction in metformin use, and a slight increase in DPP-4is use. TZDs, MEGs, and AGIs prescriptions remained stable. Among SGLT2is, empagliflozin showed considerable increase on the expense of dapagliflozin which decreased significantly by the end of 2018. Conclusion: SGLT2is have been gradually replacing SUs in Qatar and the trend of their use is similar to that reported in other countries. The trend among SGLT2is suggests greater preference for empagliflozin over dapagliflozin.
{"title":"Trends of use of SGLT2 inhibitors in Qatar","authors":"Nancy Zaghloul, A. Awaisu, Ahmed A. Mahfouz, Sumaya Al Saadi, H. Elewa","doi":"10.29117/quarfe.2021.0108","DOIUrl":"https://doi.org/10.29117/quarfe.2021.0108","url":null,"abstract":"Background: Type 2 diabetes mellitus (T2DM) represents a growing health challenge in Qatar and worldwide. T2DM is associated with a high risk of cardiovascular (CV) morbidity and mortality, and progression of renal disease. Sodium glucose co-transporter 2 inhibitors (SGLT2is) are the most recently approved class of glucose lowering medications (GLMs). To date, there is a limited knowledge about the adoption of SGLT2is by clinicians compared to other oral GLMs in Qatar and Middle East and North Africa (MENA) region. Accordingly, this proposed study aims to explore the trends in SGLT2is use compared to other oral GLMs in Qatar from 2016 to 2020. Methods: This is a descriptive, retrospective cross-sectional study where information on all oral GLMs prescriptions dispensed as in- or out-patient from 2016 to 2020 in all Hamad Medical Corporation (HMC) hospitals were collected. Outcomes included the number and relative frequency of quarterly prescriptions of different oral GLMs classes [metformin, sulfonylureas (SUs), dipeptidyl peptidase 4 inhibitors (DPP-4is), thiazolidinediones (TZDs), meglitinides (MEGs), α-glucosidase inhibitors (AGIs), and SGLT2is] from 2016 to 2020. Results: Overall, the prescription rate of GLMs increased during the last five years. SGLT2is use increased over the years after being introduced to the formulary in 2017, replacing SUs which exhibited significant decline between 2017 and 2020. There was a slight reduction in metformin use, and a slight increase in DPP-4is use. TZDs, MEGs, and AGIs prescriptions remained stable. Among SGLT2is, empagliflozin showed considerable increase on the expense of dapagliflozin which decreased significantly by the end of 2018. Conclusion: SGLT2is have been gradually replacing SUs in Qatar and the trend of their use is similar to that reported in other countries. The trend among SGLT2is suggests greater preference for empagliflozin over dapagliflozin.","PeriodicalId":9295,"journal":{"name":"Building Resilience at Universities: Role of Innovation and Entrepreneurship","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81737580","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}
Pub Date : 2021-10-20DOI: 10.29117/quarfe.2021.0017
R. Abdou, Mohamed alHor, Z. Ahmed, Noora Althani
Organic – inorganic halide perovskite (OHP) has drawn researchers’ attention working in the field of optoelectronics from last ten years due to its remarkable optical properties such as adjustable band gap, ambipolar charge transport, high optical absorption coefficients, and extended carrier diffusion lengths. OHP based memristors (memory + resistors) are a newly introduced passive two-terminal, nonlinear device used for information storage. In this work we have fabricated methyl ammonium lead iodide (MAPbI3) crystals-based device from MAPbI3 crystals. The crystals have been developed by simple solution process-based method. Developed crystals have shown highly porous geometry and trap charges across these pores facilitates higher conductivity. The fabricated device exhibits ~2.7 milli second response recovery time, which enabled elevated speed and showed hysteresis in the I-V characteristics thus demonstrating superior storage capacities. Hence, the developed device has been potential tool for next-generation non-volatile memories.
{"title":"Development of organic–inorganic Halide Perovskites (OHPs) based Memristors","authors":"R. Abdou, Mohamed alHor, Z. Ahmed, Noora Althani","doi":"10.29117/quarfe.2021.0017","DOIUrl":"https://doi.org/10.29117/quarfe.2021.0017","url":null,"abstract":"Organic – inorganic halide perovskite (OHP) has drawn researchers’ attention working in the field of optoelectronics from last ten years due to its remarkable optical properties such as adjustable band gap, ambipolar charge transport, high optical absorption coefficients, and extended carrier diffusion lengths. OHP based memristors (memory + resistors) are a newly introduced passive two-terminal, nonlinear device used for information storage. In this work we have fabricated methyl ammonium lead iodide (MAPbI3) crystals-based device from MAPbI3 crystals. The crystals have been developed by simple solution process-based method. Developed crystals have shown highly porous geometry and trap charges across these pores facilitates higher conductivity. The fabricated device exhibits ~2.7 milli second response recovery time, which enabled elevated speed and showed hysteresis in the I-V characteristics thus demonstrating superior storage capacities. Hence, the developed device has been potential tool for next-generation non-volatile memories.","PeriodicalId":9295,"journal":{"name":"Building Resilience at Universities: Role of Innovation and Entrepreneurship","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85927763","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}
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