Nano composites Based a Polymer Matrix and Their Advanced Applications, A Review

في هذه المراجعة تمت تغطية الأنواع العديدة من مراحل التعزيز للمركبات النانوية مثل (الجسيمات النانوية، والألياف النانوية، وأنابيب الكربون النانوية، وأصباغ النانو الطبيعية)، مع التركيز على الحاجة إلى هذه المواد ، وطرق تصنيعها ، وبعض النتائج الحديثة حول بنيتها. والخصائص والاستخدامات الممكنة. ضرورة وجود مثل هذه المواد المحتملة فضلا عن استخدامات أخرى مثيرة للاهتمام. توفر تطبيقات المركبات النانوية إمكانات تقنية وتجارية جديدة للعديد من قطاعات الطلاء والسيارات والإلكترونيات مثل الخلايا الشمسية وتغليف المواد الغذائية والصناعات الأخرى بسبب ملاءمتها للبيئة. المواد عالية الأداء ذات الميزات الفريدة تشمل المركبات النانوية التي لها أهمية كبيرة في التطبيقات المتقدمة الجديدة. تعتبر اللدائن واللدائن الهندسية من اكثر المواد الهندسية التي تحتاج الى تصنيعها بهياة مواد نانوية متراكبة بسبب معدل النمو السنوي السريع بحدود 25٪. المتراكبات النانوية مفيدة في مجموعة متنوعة من التطبيقات، من التعبئة والتغليف إلى التطبيقات الطبية الحيوية، نظرًا لقدراتها الكبيرة  لذلك من الضرورة تسليط الضوء على هذه المواد وطرق معالجتها وبعض النتائج الجديدة التي تطرا على الهيكل والخصائص وكذلك والتطبيقات الممكنة.     This review covers the various types of reinforcement phases of nanocomposites, such as nanoparticles, nanofibers, carbon nanotubes, and natural nanopigments, with a focus on the requirement of these materials, their production processes, and some current knowledge about their structure, properties, and potential applications. The necessity for such potential materials as well as other intriguing uses are perspectives. Applications of nanocomposites offer new technical and commercial potential for numerous sectors of the coating, automotive, electronics as solar cell, food packaging, and other industries because to their environmental friendliness.      High performance materials with unique features include nanocomposites have a significant importance in the new advanced applications.  Engineering plastics and elastomers have the fastest increasing requirement for fabrication as a nanocomposites with an expected annual growth rate of 25%. They are useful in a variety of applications, from packaging to biomedical ones, due to their great capabilities

The Creative Role of the Lawyer – Example: The Office of the World Bank\u27s General Counsel

A presentation before the Columbus School of Law, The Catholic University of America, Washington, D.C. February 22, 1999

Pathways from uncertainty to anxiety: An evaluation of a hierarchical model of trait and disorder-specific intolerance of uncertainty on anxiety disorder symptoms

Uncertainty is central to anxiety-related pathology and intolerance of uncertainty (IU) appears to be a transdiagnostic risk and maintaining factor. The aim of the present study was to evaluate a hierarchical model to identify the unique contributions of trait and disorder-specific IU (i.e., uncertainty specific to generalised anxiety disorder, social anxiety, obsessive compulsive disorder, and panic disorder) to disorder-specific symptoms, beyond other disorder-specific cognitive vulnerabilities (i.e., negative metacognitive beliefs, fear of negative evaluation, inflated responsibility, and agoraphobic cognitions, respectively). Participants (N = 506) completed a battery of online questionnaires. Structural equation modelling was used to evaluate model fit, as well as direct and indirect pathways. Trait and disorder-specific IU were significantly associated with multiple cognitive vulnerability factors and disorder symptoms. Indirect effects between trait IU and symptoms were observed through disorder-specific IU and cognitive vulnerabilities. The relative contribution of trait IU and disorder-specific IU to symptoms varied and theoretical and clinical implications are highlighted. Limitations include the cross-sectional design and reliance on self-report. Avenues for further research include a need for replication and extension of the model in different samples and using experimental and multi-method research methods

Investigation of Visualization Needs for Vertical Repetitive Projects

Repetitive construction projects, particularly high-rise buildings, are complex projects that suffer from cost overruns and delays. For these projects, efficient repetitive scheduling becomes necessary. Repetitive scheduling, however, remains less utilized in the industry due mainly to its visualization challenges. In an effort to improve schedule visualization, this thesis surveys available software packages for scheduling repetitive and non-repetitive projects and summarizes the visualization challenges for high-rise buildings.To improve schedule visualization, a new visualization method, Activity Continuity on Time-Inclined Visual (ACTIV), has been developed in this thesis. ACTIV changes the typical slanted lines of the repetitive schedule into vertical lines that resemble the shape of the high-rise building. The main concept is to represent the time-axis at an angle, rather than the typical horizontal orientation. To incorporate many activities, the time-axis angle is calculated differently for each activity. Based on the results of using ACTIV on a case study project, its interesting capabilities include better scheduling of structural core activities presenting the time-axis on an activity-dependent angle and producing legible schedule reports. Recommendations for adapting the proposed method to other types of repetitive projects are made