280 research outputs found

    Future Prospects for Macro Rainwater Harvesting (RWH) Technique in North East Iraq

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    Countries in Middle East and North Africa (MENA region) are considered arid and semi-arid areas that are suffering from water scarcity. They are expected to have more water shortages problem due to climatic change. Iraq is located in the Middle East covering an area of 433,970 square kilometers populated by 31 million inhabitants. One of the solutions suggested to overcome water scarcity is Rain Water Harvesting (RWH). In this study Macro rain-water harvesting technique had been tested for future rainfall data that were predicted by two emission scenarios of climatic change (A2 and B2) for the period 2020-2099 at Sulaimaniyah Governorate north east of Iraq. Future volumes of total runoff that might be harvested for different conditions of maximum, average, and minimum future rainfall seasons under both scenarios (A2 and B2) were calculated. The results indicate that the volumes of average harvested runoff will be reduced when average rainfall seasons are considered due to the effect of climatic change on future rainfall. The reduction reached 10.82 % and 43.0% when scenarios A2 and B2 are considered respectively

    Positional control of rotary servo cart system using generalized dynamic inversion

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    This paper presents the design approach of Generalized Dynamic Inversion (GDI) for angular position control of SRV02 rotary servo base system. In GDI, linear first order constraint differential equations are formulated based on the deviation function of angular position and its rate, and its inverse is calculated using Moore-Penrose Generalized Inverse to realize the control law. The singularity problem related to generalized inversion is solved by the inclusion of dynamic scaling factor that will guarantee the boundedness of the elements of the inverted matrix and stable tracking performance. Numerical simulations and real-time experiment are performed to evaluate the tracking performance and robustness capabilities of the proposed control law considering nominal and perturbed model dynamics. For comparative analysis, the results of GDI is compared with conventional PID control. Simulation and experimental results demonstrate better angular position tracking for the square-wave and sinusoidal waveforms, which reveals the superiority, and agility of GDI control over conventional PID

    From the "Fareej" to Metropolis" Qatar Social Capital Sirvey II

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    Qatar faces a social and economic transformation today linked to its unique demographic composition. Understanding social interactions within and across its diverse subgroups is critical for understanding and managing this transformation. In its second wave of "From Fareej to Metropolis: A Social Capital Survey of Qatar II", we set out to describe those interactions and to compare them to the findings from the 2011 first wave survey. To achieve this goal, we draw on the concept of social capital, which refers to the sum of correlation indicators between the members of the same community, whether at the level of family and personal relationships, between different groups in the community, or the trust in institutions and public services. 2 Numerous studies support the hypothesis that there is a link between the increase of social capital in a certain community and its prosperity, including the work by Robert Putnam3 on Italian south and north provinces, in which he makes a link between the prosperity of the north and the increase of social capital indicators therein. This executive report presents a comparison between selected findings from the 2011 and 2015 waves of "From Fareej to Metropolis: A Social Capital Survey of Qatar.” The report is organized according to the various social capital literatures into bridging, bonding, and institutional social capital. 4 Bonding indicators examine the relationship between members of the same group and family and personal relationships, while bridging social capital indicators explore the relationship and communication between various groups. Finally, the third section presents the results of the institutional social capital indicators, which examine the attitudes of Qataris and white-collar expats towards government services, media sources, and their participation in charity and volunteer work. The report concludes that social capital in Qatar is still high in terms of within-group bonding relationships. It also indicates a significant increase in the indicators of trust among Qataris and white-collar workers in particular, while the percentage remained stable for the blue-collar workers as compared to the previous wave of the study. Last section of the study notes a rise in confidence among Qataris and white-collar workers in government agencies and services, and in unofficial sources of information such as majlis, the internet, and friends. It is also noted that there is no significant increase in the percentage of people participating in civil society institutions between the two waves of the study

    Social capital and sense of neighbourhood belonging among Qatari nationals

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    This study examines citizens’ sense of neighbourhood belonging in the Gulf Cooperation Council (GCC) countries, focusing on the State of Qatar. While much research about this issue has been conducted in developed countries, little is known about how citizens’ ‘stock’ of social capital, religiosity and civic engagement affect their sense of belonging to their neighbourhood within GCC countries. In the present study, we address this question by analysing data from two waves of nationally representative surveys undertaken in Qatar, drilling down into the various dimensions of social capital and their effect on community attachment at the neighbourhood level. The results indicate that, even after controlling for a wide range of demographic variables, social capital has a strong effect on the nationals’ sense of belonging to their communities. The results have implications for researchers with respect to the salience of social capital as a concept and for policymakers concerned with building an integrated and diverse community that is inclusive of people from various backgrounds

    Abaqus Simulation of the Fire's Impact on Reinforced Concrete Bubble Deck Slabs

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    The use of Bubble Deck in modern prefabricated construction methods has recently become widespread in industrial projects worldwide. In the middle of a typical slab, Bubble Deck places hollow plastic balls that do not improve structural performance but significantly reduce structural weight. This study analyzes the behavior of self-uniting bidirectional concrete slabs with plastic spherical voids under high temperatures and for different periods. Six simply supported bidirectional plates, five of which contained bubbles and one solid, were numerically tested using the finite element method and the commercial ABAQUS software to investigate the behavior of bidirectional plates fired at various temperatures and for various amounts of time. Each slab has the following measurements: (1500*1500*150) mm. These slabs were fired at different temperatures (600 and 800) °C and for different periods (one and two hours). The slabs were classified into four groups depending on the kind of slab (solid or bubble), the degree of burning (600 and 800) °C, and the duration of the burning (one and two hours). The loading strength of concrete was found to be up to 65% less than the maximum capacity of a slab that was bubbled and fired at high temperatures. The length of the firing time also had a significant effect on reducing the strength of the concrete. The longer the firing period, the lower the load resistance of the concrete. The ball would melt and scorch in an intense, protracted fire without noticeable effects. The ability of the steel to maintain adequate strength during a fire, when it will be burned and lose significant strength as the temperature rises, determines the slab’s ability to withstand fire. Bubble deck slabs produce between 17% and 39% stronger thermal resistance than an equivalent solid slab of the same depth, even though they are not intended to provide thermal insulation due to the encapsulation of the air bubbles within the center of the concrete slab

    استطلاع آراء القطريين والوافدين حول استضافة كأس العالم لكرة القدم 2022

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    This report presents the results of The Qatar 2022 FIFA World Cup survey of Qatari nationals and white-collar expatriates residing in Qatar. The study was conducted and funded by the Social and Economic Survey Research Institute (SESRI) at Qatar University in collaboration with the University of Florida. The data are intended to inform planners and decision makers, as well as the academic community. All those connected with this project are grateful to the hundreds of Qatari nationals and white-collar residents who gave their valuable time to participate in this survey. The successful completion of the survey was made possible through the contributions of many dedicated individuals who work at the Social and Economic Survey Research Institute (SESRI), Qatar University, and at Department of Tourism, Recreation and Sport Management, College of Health and Human Performance at the University of Florida. The Social & Economic Survey Research Institute (SESRI) is an independent research organization at Qatar University. Since its inception in 2008, it has developed a strong survey-based infrastructure in order to provide high quality survey data for planning and research in the social and economic sectors.الهدف من هذا المشروع هو تقييم مدى تأثير كأس العالم على تغيير نوعية حياة الأشخاص الذين يعيشون في دولة قطر من خلال تقييم تأثير الإعداد لهذا الحدث على البلد والمنطقة. وقد تم الإشارة إلى إرث الفعالية في كلمات رئيس لجنة ملف قطر 2022 ،الشيخ محمد بن حمد آل ثاني: "إن المنافع الاقتصادية ستكون كبيرة لكل بلد في منطقة الشرق الأوسط. وسيكون منصة كبيرة نحو تغيير نظرة العالم الإسلامي ومنطقة الشرق الأوسط للعالم الخارجي". أهداف الدراسة ذات شقين: أ) دراسة تأثيرات الفعالية على الاتجاهات العامة، ونوعية الحياة والتصورات و دعم كأس العالم في دولة قطر وعالقة ذلك مع نوعية حياة المقيمين من أجل تحديد آثار الفعالية على المواطنين و المقيمين في دولة قطر؛ ب) وضع بيانات مرجعية للمواطنين و للمقيمين في دولة قطر بشأن تأثيرات كأس العالم على المنطقة. تتمثل أهمية الدراسة في ثلاث جوانب: أولا توفر بيانات أساسية وتضع أساسا لنهج طولي لتقييم آثار الفعاليات الكبيرة، و هو ما ينقصنا حاليا في أدبيات الاطار النظري. ثانيا اقتراح نموذج لتقييم العوامل التي تؤثر على المواقف تجاه الفعالية، ونوعية الحياة ودعم الفعالية في دولة مثل قطر التي تمثل منطقة الشرق الأوسط والقيم الثقافية والحياتية المرتبطة بالبلد والمنطقة. ثالثا يسمح هذا التقييم بتشكيل وتنفيذ سياسة من شأنها أن تؤدي إلى تدخلات لتحسين نوعية حياة السكان والحصول على تأييدهم تجاه الفعالية من خلال مشاركتهم في عملية استضافة الحدث. بالإضافة إلى ذلك، ستوفر الدراسة لصناعة الرياضة في دولة قطر والمنظمات المرتبطة بكرة القدم، مثل اللجنة العليا للمشاريع والإرث، معلومات تساعد على صياغة استراتيجيات الاتصال ذات الصلة مع وسائل الإعلام وغيرها من الجهات المعنية (مثل، الهيئة العامة للسياحة) و يمكن أن تكون البيانات الأساسية أرضية للدارسين الذين يهدفون إلى مراقبة تصورات مشابهة للعمل/ البحث في المستقبل، و بالتالي إيجاد بصمة في المجال التعليمي. في مسح كأس العالم لكرة القدم 2022 في قطر، تم إجراء مقابلات مع عينة تمثل المواطنين القطريين و الوافدين أصحاب المهن المكتبية. بشكل عام، تم عقد 2163 مقابلة، منها1058))مع المواطنين القطريين و(1105) مع الوافدين من أصحاب المهن المكتبية. تم اختيار المواطنين القطريين و الوافدين أصحاب المهن المكتبية من أسر من جميع البلديات في دولة قطر وتم إجراء مقابلات شخصية باللغة العربية أو الإنجليزية اعتمادا على برنامج استخدام الحاسب. يوجد مزيد من التفاصيل عن منهجية البحث في القسم السابع. ملاحظة: تشير كلمة الوافدون/الوافدين في التقرير إلى أفراد العينة من غير القطريين والذين تم وصفهم في موجز المنهجية بأصحاب المهن المكتبية

    المسح السنوي الشامل : مسح عن الحياة في دولة قطر 2014

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    This Executive Summary presents the highlights of the 2014 Omnibus survey, the fourth in a series of Omnibus surveys since 2010. The surveys were carried out by the Social and Economic Survey Research Institute (SESRI) of Qatar University. Each Omnibus survey interviews a large and representative sample of Qatari citizens, resident expatriates and laborers. In these surveys, we asked a number of questions covering several topics of importance to Qatari society, including their attitudes and behaviors related to media; political values and attitudes; gender; charities and charitable donations; traffic; and laborers. The survey was designed and carried out in accordance with the highest scientific and ethical standards. Respondents were assured that their answers would be confidential and presented in an aggregate format. This project was fully funded by the Social and Economic Survey Research Institute (SESRI) at Qatar University. The findings made herein are solely the responsibility of the authors.يقدم هذا التقرير الموجز أبرز ما في المسح الشامل لعام 2014 ،الرابع في سلسلة المسوح الشاملة منذ عام 2010 .تم تنفيذ البحوث من قبل معهد البحوث الاجتماعية والاقتصادية المسحية((SESRI بجامعة قطر. في كل مسح شامل تم استطلاع آراء عينة كبيرة تمثل المواطنين القطريين، والمقيمين والعمال. في هذه المسوح تم طرح عدد من الأسئلة تغطي العديد من المواضيع التي تهم المجتمع القطري، بما في ذلك المواقف والسلوكيات المتعلقة بوسائل الإعلام؛ والقيم والمواقف السياسية؛ دور الرجل والمرأة؛ المؤسسات والتبرعات الخيرية؛ وحركة المرور؛ والعمال الوافدين. صمم ونفذ هذا المسح وفقا لأعلى المعايير العلمية والأخلاقية. وتم التأكيد على المشاركين بأن إجابتهم سرية ومقدمة في شكل إجمالي. وقد تم تمويل هذا المشروع بالكامل من قِبل معهد البحوث الاجتماعية والاقتصادية المسحية بجامعة قطر. وإن الاستنتاجات الموجودة في هذا التقرير هي مسؤولية المؤلفين وحدهم

    The effects of long-term testosterone treatment on endocrine parameters in hypogonadal men: 12-year data from a prospective controlled registry study.

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    Testosterone therapy (TTh) is the primary treatment for aging men with functional hypogonadism. Whilst the benefits of testosterone (T) replacement are well-evidenced, the long-term data for TTh on metabolic and endocrine parameters is limited. Here we present the effect of TTh on endocrine parameters in hypogonadal men at a 12-year follow-up. In this single-centre, cumulative, prospective, registry study, 321 hypogonadal men (mean age: 58.9 years) received testosterone undecanoate injections in 12-week intervals for up to 12 years. Blood samples were taken at every other visit to measure levels of total T (TT), calculated free T, sex hormone-binding globulin (SHBG), estradiol, luteinizing hormone (LH), follicle-stimulating hormone (FSH), progesterone and prolactin. We observed an increase in TT of 15.5 nmol/L (p p p p p p p < 0.0001) were demonstrated at 12-years. The levels of prolactin remained unchanged. Long-term TTh altered hormonal parameters to predictably modify the endocrine system. These effects were sustained during the entire observation time of 12 years

    Acceptability and feasibility of a computer-based application to help Aboriginal and Torres Strait Islander Australians describe their alcohol consumption

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    We examined acceptability and feasibility of a tablet application (“App”) to record self-reported alcohol consumption among Aboriginal and Torres Strait Islander Australians. Four communities (1 urban; 3 regional/remote) tested the App, with 246 adult participants (132 males, 114 females). The App collected (a) completion time; (b) participant feedback; (c) staff observations. Three research assistants were interviewed. Only six (1.4%) participants reported that the App was “hard” to use. Participants appeared to be engaged and to require minimal assistance; nearly half verbally reflected on their drinking or drinking of others. The App has potential for surveys, screening, or health promotion

    Measuring progress from 1990 to 2017 and projecting attainment to 2030 of the health-related Sustainable Development Goals for 195 countries and territories: a systematic analysis for the Global Burden of Disease Study 2017

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    Background Efforts to establish the 2015 baseline and monitor early implementation of the UN Sustainable Development Goals (SDGs) highlight both great potential for and threats to improving health by 2030. To fully deliver on the SDG aim of “leaving no one behind”, it is increasingly important to examine the health-related SDGs beyond national-level estimates. As part of the Global Burden of Diseases, Injuries, and Risk Factors Study 2017 (GBD 2017), we measured progress on 41 of 52 health-related SDG indicators and estimated the health-related SDG index for 195 countries and territories for the period 1990–2017, projected indicators to 2030, and analysed global attainment. Methods We measured progress on 41 health-related SDG indicators from 1990 to 2017, an increase of four indicators since GBD 2016 (new indicators were health worker density, sexual violence by non-intimate partners, population census status, and prevalence of physical and sexual violence [reported separately]). We also improved the measurement of several previously reported indicators. We constructed national-level estimates and, for a subset of health-related SDGs, examined indicator-level differences by sex and Socio-demographic Index (SDI) quintile. We also did subnational assessments of performance for selected countries. To construct the health-related SDG index, we transformed the value for each indicator on a scale of 0–100, with 0 as the 2·5th percentile and 100 as the 97·5th percentile of 1000 draws calculated from 1990 to 2030, and took the geometric mean of the scaled indicators by target. To generate projections through 2030, we used a forecasting framework that drew estimates from the broader GBD study and used weighted averages of indicator-specific and country-specific annualised rates of change from 1990 to 2017 to inform future estimates. We assessed attainment of indicators with defined targets in two ways: first, using mean values projected for 2030, and then using the probability of attainment in 2030 calculated from 1000 draws. We also did a global attainment analysis of the feasibility of attaining SDG targets on the basis of past trends. Using 2015 global averages of indicators with defined SDG targets, we calculated the global annualised rates of change required from 2015 to 2030 to meet these targets, and then identified in what percentiles the required global annualised rates of change fell in the distribution of country-level rates of change from 1990 to 2015. We took the mean of these global percentile values across indicators and applied the past rate of change at this mean global percentile to all health-related SDG indicators, irrespective of target definition, to estimate the equivalent 2030 global average value and percentage change from 2015 to 2030 for each indicator.Background Efforts to establish the 2015 baseline and monitor early implementation of the UN Sustainable Development Goals (SDGs) highlight both great potential for and threats to improving health by 2030. To fully deliver on the SDG aim of “leaving no one behind”, it is increasingly important to examine the health-related SDGs beyond national-level estimates. As part of the Global Burden of Diseases, Injuries, and Risk Factors Study 2017 (GBD 2017), we measured progress on 41 of 52 health-related SDG indicators and estimated the health-related SDG index for 195 countries and territories for the period 1990–2017, projected indicators to 2030, and analysed global attainment. Methods We measured progress on 41 health-related SDG indicators from 1990 to 2017, an increase of four indicators since GBD 2016 (new indicators were health worker density, sexual violence by non-intimate partners, population census status, and prevalence of physical and sexual violence [reported separately]). We also improved the measurement of several previously reported indicators. We constructed national-level estimates and, for a subset of health-related SDGs, examined indicator-level differences by sex and Socio-demographic Index (SDI) quintile. We also did subnational assessments of performance for selected countries. To construct the health-related SDG index, we transformed the value for each indicator on a scale of 0–100, with 0 as the 2·5th percentile and 100 as the 97·5th percentile of 1000 draws calculated from 1990 to 2030, and took the geometric mean of the scaled indicators by target. To generate projections through 2030, we used a forecasting framework that drew estimates from the broader GBD study and used weighted averages of indicator-specific and country-specific annualised rates of change from 1990 to 2017 to inform future estimates. We assessed attainment of indicators with defined targets in two ways: first, using mean values projected for 2030, and then using the probability of attainment in 2030 calculated from 1000 draws. We also did a global attainment analysis of the feasibility of attaining SDG targets on the basis of past trends. Using 2015 global averages of indicators with defined SDG targets, we calculated the global annualised rates of change required from 2015 to 2030 to meet these targets, and then identified in what percentiles the required global annualised rates of change fell in the distribution of country-level rates of change from 1990 to 2015. We took the mean of these global percentile values across indicators and applied the past rate of change at this mean global percentile to all health-related SDG indicators, irrespective of target definition, to estimate the equivalent 2030 global average value and percentage change from 2015 to 2030 for each indicator
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