Det finns över 200 miljoner aktiva hemsidor till drygt 5 miljarder användare. I takt med attinternet har växt och utvecklingen gått kraftigt framåt har användare blivit mer kräsna överinnehållet på en hemsida.Varje gång en användare besöker en hemsida gör användaren ensnabb utvärdering av hemsidan för att avgöra om denne vill stanna på sidan eller lämna denpå en gång.Målet med denna studie är att titta närmare på hur webbdesign påverkar användarens val attstanna kvar på en hemsida eller inte. Studien inriktar sig på hur valet av typsnitt, bild och färgpåverkar användarens vilja att stanna kvar på hemsidan utifrån trovärdighet ochanvändbarhet.För att besvara forskningsfrågorna så skickades en enkät ut där deltagarna fick besvara denuppleva trovärdigheten och användbarheten utifrån tre designaspekter, typsnitt, bild och färgsamt se hur detta påverkar deltagarnas vilja att stanna kvar på hemsidan.Resultatet visar att alla tre designprinciper påverkade användarens vilja att stanna kvar påhemsidan. De designelementen som undersöktes påverkade användarens vilja att stanna kvarpå hemsidan i följande ordning från minst till störst påverkan: typsnitt, färg, bild.Sammanfattningsvis visar studien på att en användares benägenhet att stanna kvar på enhemsida kan öka om designen är tillfredsställande och genomtänkt. / There are over 200 million active websites for just over 5 billion users. As the internet hasgrown and technological development has progressed greatly, users have become more pickyabout the content of a website. Each time a user visits a website, the user makes a quickevaluation of the website to decide if they want to stay on the page or leave it at once.The aim of this study is to take a closer look at how web design affects the user's choice tostay on a website or not. The study focuses on how the choice of font, image and color affectsthe user's desire to stay on the website based on trustworthiness and usability.To answer the research questions, a survey was sent out where the participants had to answerthe perceived trustworthiness and usability based on three design aspects, font, image andcolor and see how this affects the participants' willingness to stay on the website.The results show that all three design principles influenced the user's willingness to stay onthe website. The design elements that were examined influenced the user's willingness to stayon the website in the following order from least to greatest impact: font, color, image.In summary, the study shows that a user's tendency to stay on a website can increase if thedesign is satisfactory and well thought out.

Truncation errors and computational cost are obstacles that still hinder large-scale applications of the Computational Fluid Dynamics method. The discontinuous Galerkin method is one of the high-order schemes utilized extensively in recent years, which is locally conservative, stable, and high-order accurate. Besides that, it can handle complex geometries and irregular meshes with hanging nodes. In this document, the nondimensional compressible Euler equations and Reynolds- Averaged Navier-Stokes equations are discretized by discontinuous Galerkin methods with a two-equations turbulence model on both structured and unstructured meshes. The traditional equation of state for an ideal gas model is substituted by a multispecies thermodynamics model in order to complete the governing equations. An approximate Riemann solver is used for computing the convective flux, and the diffusive flux is approximated with some internal penalty based schemes. The temporal discretization of the partial differential equations is either performed explicitly with the aid of Rung-Kutta methods or with semi-implicit methods. Inspired by the artificial viscosity diffusion based limiter for shock-capturing method, which has been extensively studied, a novel and robust technique based on the introduction of mass diffusion to the species governing equations to guarantee that the species mass fractions remain positive has been thoroughly investigated. This contact-surface-capturing method is conservative and a high order of accuracy can be maintained for the discontinuous Galerkin method. For each time step of the algorithm, any trouble cell is first caught by the contact-surface discontinuity detector. Then some amount of mass diffusions are added to the governing equations to change the gas mixtures and arrive at an equilibrium point satisfying some conditions. The species properties are reasonable without any oscillations. Computations are performed for many steady and unsteady flow problems. For general non-mixing fluid flows, the classical air-helium shock bubble interaction problem is the central test case for the high-order discontinuous Galerkin method with a mass diffusion based limiter chosen. The computed results are compared with experimental, exact, and empirical data to validate the fluid dynamic solver.

No description available.

OBJECTIVES: Tools are needed for determining appropriate weights for complex performance assessment components in medical education. The feasibility of using judgmental policy capturing (JPC), a procedure to statistically describe the information processing strategies of experts, for this purpose was investigated. METHODS: Iterative JPC was used to determine appropriate weighting for the six core communication skill scores from a communications objective structured clinical examination (OSCE) for medical students using a panel of four communication skill experts. RESULTS: The mean regression weights from the panel indicated they placed less importance on information management (8.5%), moderate and nearly equal importance on rapport building (15.8%), agenda setting (15.4%), and addressing feelings (14.1%), and greater importance on active listening (20.1%) and reaching common ground with the patient (25.5%). DISCUSSION: JPC is an effective procedure for determining appropriate weights for complex clinical assessment components. The derived weights may be very different for those assessment components.

No / Technology application to agricultural productivity is thought to be the solution to meet food demand of the growing population. In a rapidly changing world, with the prospect of decreasing arable land due to urbanization and industrialization, agricultural output requires a 70 % increase in production levels and efficient growth in the harvesting, distribution and consumption of the resources, to meet demand. There are innovations in Information and Communications Technology that can be applied to the agricultural sector in areas of precision farming, use of farm management software, wireless sensors, and use of agricultural machinery. Remote sensing technology is playing a key role through precision agriculture. This paper highlights ways in which precision agriculture is impacting on agriculture with the use of unmanned aerial vehicles for image capturing, processing and analysis.

Based on an integration of job design and lifespan developmental theories, Truxillo et al. (2012) proposed that job characteristics interact with employee age in predicting important work outcomes. Using an experimental policy-capturing design, we investigated age-differential effects of four core job characteristics (i.e., job autonomy, task variety, task significance, and feedback from the job) on job attraction (i.e., individuals' rating of job attractiveness). Eighty-two employees between 19 and 65 years (Mage = 41, SD = 14) indicated their job attraction for each of 40 hypothetical job descriptions in which the four job characteristics were systematically manipulated (in total, participants provided 3,280 ratings). Results of multilevel analyses showed that the positive effects of task variety, task significance, and feedback from the job were stronger for younger compared to older employees, whereas we did not find significant age-differential effects of job autonomy on job attraction. These findings are only partially consistent with propositions of Truxillo et al.'s (2012) lifespan perspective on job design.

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In the field of sustainable architecture, transformability is an important way of actively responding to ambient conditions while also meeting the needs of occupants and addressing issues of building performance. This research contributes knowledge for architects about the potential of kinetics for the shading system to respond effectively to changes in its environment. Within contemporary architecture, there is a growing interest in motion; buildings and their parts are gradually shifting from static to dynamic. However, contemporary activities in architecture are evidence of a lack of a holistic approach to the design of motion in architecture and the design of motion as an alternative mode of design thinking is still in its infancy. Consequently, the existing tradition of static forms being the sole forms taught in architectural studies should be reevaluated as a design strategy. This research is a step in the direction of better understanding the key knowledge exchanges within the design process of transformable shading systems. It will seek to investigate, explore, and propose how the concept of transformability in designing shading systems can be suggested, depicted, or physically incorporated in building envelopes. In order to get the full potential of the design process of transformable shading systems, this study presents a design workflow of a specific case, called AURA, that helps to create openings for establishing a proper design methodology of transformable shading systems. While the workflow will be concerned with identifying the key decision nodes, it is anticipated that in-depth development will determine critical parameters addressing transformation itself as a design parameter of transformable shading systems. Two studio-based courses offered at Virginia Tech and Texas AandM by the author will become a testing ground for evaluating the key decision nodes found in the design process of AURA within the context of architectural programs, bringing forth the opportunity to expand the current domain of transformable shading systems to a broader perspective of architecture pedagogy. In this case, this research is a step towards adding values directly into the content of the curricula, and thus into the field of design education as a whole.' / Ph. D.

Realistic scenarios were evaluated to determine whether participants would make ethical/ unethical decisions in the face of various dilemmas. 3 factors were systematically varied throughout 32 different scenarios: accountability, deception, and profitability. A personality variable, locus of control was also explored for its relationship to ethical decision making. Subjects were 25 managers from a national car rental company as well as 21 undergraduate students. In a policy-capturing analysis of the ethical reasoning process., we found neither managers nor students used consistent policies in their decision making. Regression analyses revealed that locus of control orientation did not influence number of ethical decisions made. Implications for the study of ethical decision making are discussed. / Master of Science

The expansion of the internet over recent years has resulted in an increase in digital attacks on computers. Most attacks, including the more dangerous ones, directly target program vulnerabilities. The increase in attacks has prompted a need to develop new ways to classify, detect, and avoid vulnerabilities. The effectiveness of these goals relies on the development of new methods and tools that facilitate the process of detecting vulnerabilities and exploits. This thesis presents the development of a tool that provides a visual representation of main memory for the purpose of security analysis. The tool provides new insight into memory utilization by software; users are able to see memory utilization as execution time progression, visually distinguish between memory behaviors (allocations, writes, etc), and visually observe special relationships between memory locations. The insight enables users to search for visual evidence that software is vulnerable, violated, or utilizing memory incorrectly. The development process for our visual tool has three stages: (1) identifying the memory utilization policies of the Windows 32-bit operating system; (2) identifying the data required for visual representations of memory and then implementing one possible method to capture the data; and (3) enumerating and implementing requirements for a memory tool that generates visual representations of memory for the purpose of vulnerability and exploit analysis. / Master of Science