Series of theorists have suggested that conflicts about depression and aggression. The interest of this study is occurrence of depression and aggressiveness in young teens ages 15 to 18 at cycle 3 schools in Abu Dhabi. This study will use quantitative and qualitative methods research design to explore the causes of aggressiveness in schools. The study will use a convenience sample N=80 of adolescences during the school day. This will be done by applying a open-ended and closed ended (survey) questions to answer the following research question: What are the causes that contribute to aggression behavior among Emirati male students in cycle3 school?
Obesity is a problem in the United Arab Emirates. The aim of this dissertation was to provide recommendations to improve obesity interventions in the United Arab Emirates by exploring the body image attitudes (how people think and feel about their bodies and bodies of others) of young, Emirati men. The sample population is 340 Emirati citizen men between the ages 18-29 from all seven emirates. The data was collected through focus groups, a survey, and interviews. The influences on body image attitudes of young Emirati men are religion, occupation, region, friends, technology, gym, fashion, marriage, and media. The top three influences are religion, marriage, and occupation. The researcher recommends more health messaging in the Mosque, interventions to help men from gaining weight post-marriage, and health campaigns in workplaces including sports competitions and quality foods in the cafeterias.
The UAE and the local (emirate-level) governments have adopted structured strategic planning and policy-making during the first two decades of the millennia. In-house general strategic planning and policy making skills, however, are insufficient for successfully implementing the national strategies without relying on external consulting support. This in-house recurring insufficiency is a challenge that prevents the government from comprehensively exploring its strategic issues, conceptualizing them, and producing suitable strategic remedies and policy options based on proper professional situation analysis. Continuing reliance on external consultants is financially infeasible, risky from an information security aspect and is needlessly time consuming. Two approaches to the problem should be adopted. A human resources' development approach that adopts a customized capability-building framework to offer soft skills and also an academic stream that uses established affiliations with renowned schools of government to offer academic education.
Transeterificatoin is a chemical process in which two immiscible liquids react in the presence of a catalyst to form biodiesel, and the less desired glycerol. The efficiency of the process depends on numerous variables, including reactants molar ratio, flow and agitation speed, temperature and pressure, residence time, reactor configuration as well as the amount of the catalyst. Numerical simulation can be used at the conceptual level to investigate the trend, parametric dependency, offset numerous experimentation hassles and their associated capital and cost. This work details the development of numerical reactive flow model applied to transesterification following a coupled thermo-chemical flow. It consists of several reactions with known rate constants and activation energies. The model has been used to carry parametric study of the process parameters. Special attention here is given to the rate of reactions and their behavior in a semi-continuous tubular reactor.
In this paper the effect of imperfections ( holes and cracked holes with and without bugs) on the load bearing capacity of pure aluminum thin plates subjected to tensile load is investigated. The results illustrated that the presence of plug improve the load bearing capacity of the. The maximum load has been significantly increase for sheets with central hole due to the presence of the plugs.
A swirl-stabilized burner was designed to enhance combustion by coupling an atmospheric plasma discharge to a premixed methane/air turbulent jet. The swirl stabilized burner consists of a highvelocity, premixed central jet that is stabilized in the recirculation zones created by the four tangentially placed swirl inlets. A tunable microwave waveguide is used to achieve direct coupling of plasma to the reaction zone. OH radical number densities were measured using chemiluminescence imaging. Direct plasma coupling anchored the flame onto the electrode thus preventing blow off and thereby enhancing flame stability. Flame stability was characterized in terms of the lean blow off limit. It was observed that increasing the swirl ratio and/or the coupled plasma power enhanced the flame stability by significantly lowering the lean blow off limit. This was found to be in good agreement with the measured increase in OH radical density with increase in swirl and/or coupled plasma power.
A computational model for thermal barrier coatings made using Electron Beam Physical Vapor Deposition (EB-PVD) route is developed to predict the stresses in the coating systems upon cool down to room temperature from maximum operating temperature. Bending effects due to thermal expansion coefficient mismatch between the different layers are accounted for. Temperature dependent material properties and spatial variation of topcoat's properties due to sintering are also considered. Intercolumnar sintering takes place in the top coat (TBC) of the multilayer system. The effect of sintering of top on the stresses induced in the Thermally Grown Oxide (TGO) is studied. Finite Element Analysis indicate that the stresses in TGO increases due to sintering.
This work presents the findings of a research study investigating the novel lightweight structures of polymer foams reinforced with composite tubes for blast protection. The specimens were tested under quasi-static tests at a loading rate of 1mm/minute. Initial attention focused on establishing the influence of tube diameter on the specific energy absorption (SEA) and the failure characteristics of the tubes. In the next stage of the investigation, the tubes were embedded in a range of polymer foams in order to establish the influence of foam density on the crush behaviour of these lightweight structures. A limited number of blast tests were undertaken to evaluate the dynamic response subjected to one of the most severe forms of loading.
Visible light communication (VLC) is a rapidly emerging technology that derives benefit from the tremendous developments in solid state lighting devices, such as light emitting diodes (LEDs), and its integration with wireless communication technology. A VLC system is an optical wireless (OW) communication system in which the visible light is used as the transmission medium. For OW links utilizing LEDs, the transmitter modulates the intensity of the optical signal at sufficiently high frequencies, without affecting the illumination function of the LEDs. This process is called intensity modulation. Direct detection of the decoded signals is applied at the receiver's photo detector (PD), which converts the incoming light stream into an electrical signal.
In this paper, we present a source precoder design and relay antenna selection scheme by exploiting the sparsity of the relay gain vector. We consider the Amplify-and-Forward (AF) protocol in a single relay scenario equipped with multiple antennas. For the precoder design, we present a technique which diagonalizes the Mean Squared Error (MSE) matrix using singular value decomposition (SVD) and the generalized SVD (GSVD). The proposed solution for the precoder aims at minimizing the MSE and reduce the design complexity. As for the relay antenna selection scheme, we employ a technique based on the Orthogonal Matching Pursuit (OMP) algorithm to generate the antenna selection matrix. Extensive Monte Carlo simulation results demonstrate that the performance gain of the proposed schemes over the existing ones is significant.
