Computer Aided Drafting Virtual Reality Interface

Computer Aided Drafting (CAD) is pervasive in engineering fields today. It has become indispensable for planning, creating, visualizing, troubleshooting, collaborating, and communicating designs before they exist in physical form. From the beginning, CAD was created to be used by means of a mouse, keyboard, and monitor. Along the way, other, more specialized interface devices were created specifically for CAD that allowed for easier and more intuitive navigation within a 3D space, but they were at best stopgap solutions. Virtual Reality (VR) allows users to navigate and interact with digital 3D objects and environments the same way they would in the real world. For this reason, VR is a natural CAD interface solution. Using VR as an interface for CAD software, creating will be more intuitive and visualizing will be second nature. For this project, a prototype VR CAD program was created using Unreal Engine for use with the HTC Vive to compare against traditional WIMP (windows, icons, menus, pointer) interface CAD programs for the time it takes to learn each program, create similar models, and impressions of using each program, specifically the intuitiveness of the user interface and model manipulation. FreeCAD, SolidWorks, and Blender were the three traditional interface modeling programs chosen to compare against VR because of their wide-spread use for modeling in 3D printing, industry, and gaming, respectively. During the course of the project, two VR modeling programs were released, Google Blocks and MakeVR Pro; because they were of a similar type as the prototype software created in Unreal Engine, they were included for comparison as part of this project. The comparison showed that the VR CAD programs were faster to learn and create models and more intuitive to use than the traditional interface CAD programs

Remotely triggered scaffolds for controlled release of pharmaceuticals

Fe3O4-Au hybrid nanoparticles (HNPs) have shown increasing potential for biomedical applications such as image guided stimuli responsive drug delivery. Incorporation of the unique properties of HNPs into thermally responsive scaffolds holds great potential for future biomedical applications. Here we successfully fabricated smart scaffolds based on thermo-responsive poly(N-isopropylacrylamide) (pNiPAM). Nanoparticles providing localized trigger of heating when irradiated with a short laser burst were found to give rise to remote control of bulk polymer shrinkage. Gold-coated iron oxide nanoparticles were synthesized using wet chemical precipitation methods followed by electrochemical coating. After subsequent functionalization of particles with allyl methyl sulfide, mercaptodecane, cysteamine and poly(ethylene glycol) thiol to enhance stability, detailed biological safety was determined using live/dead staining and cell membrane integrity studies through lactate dehydrogenase (LDH) quantification. The PEG coated HNPs did not show significant cytotoxic effect or adverse cellular response on exposure to 7F2 cells (p < 0.05) and were carried forward for scaffold incorporation. The pNiPAM-HNP composite scaffolds were investigated for their potential as thermally triggered systems using a Q-switched Nd:YAG laser. These studies show that incorporation of HNPs resulted in scaffold deformation after very short irradiation times (seconds) due to internal structural heating. Our data highlights the potential of these hybrid-scaffold constructs for exploitation in drug delivery, using methylene blue as a model drug being released during remote structural change of the scaffold

The Interplay of Cultural and Behavioral Capabilities in a Market-Oriented Organization

The purpose of this study is to examine both market orientation (MO) as culture and market orientation as behavior as complementary influences on organizational performance and competitive advantage. Specifically, this study examines the differences in the level of innovation among MO types and explores the possibility that MO behavior and MO culture may be mutually reinforcing indicating an interaction or of an amplifying effect

Wireless Business And The Impact On Firm Performance: The Strategic Move To Adopt A New Technology

Information and Communications Technology (ICT) is receiving increased attention due to the vast potential it presents for rural and underserved settings. Successful adoption of new technology, in particular mobile commerce, can serve as a catalyst for improving quality of life and reducing the digital divide. Adoption of new technology is dependent upon variables such as: organizational culture, business strategy, as well as their surrounding environment. Hypotheses that investigate the relationships between the above variables and business performance in the context of the new technology adoption process are formulated. A sample of small and medium-sized businesses from the American Midwest that adopted, or are in the process of adopting, wireless technology is used to test these hypotheses. The methodology, results, and managerial implications are discussed

Parsing Metacommunication in Natural Language Dialogue to Understand Indirect Requests

This paper reports on development of a natural language processing system based on human communication theory. Our system, DIALS (for DIALogue Structures), implements and extends the theory of metacommunication developed in the field of human speech communication. The theory of Dialogue Structures is based on research showing that the interpretation of conversation is enabled by metacommunications helpful in managing interactions and that indirect requests are usually patterns expressing relationships in the interaction rather than simply expressing the content of the request. As such,indirect requests are best interpreted by a semantic grammar expert at managing communciation, rather than a semantic grammar knowledgable on some specific task domain. Our system, based on this approach,correctly interprets all indirect requests from a corpus of 1500 requests transcribed from tape recordings with a combined total of over 80minutes of continuous conversation of 27 dialogues between airline reservation agents and customers

The Emotional Dimension of Judging: Issues, Evidence, and Insights

Judicial emotions—their display in the courtroom, influence on judicial behavior, and ultimately, their impact on public trust in the judiciary—are under scrutiny as neuro-scientists and social scientists take a fresh look at judicial work and conduct. Emotions and their regulation raise important issues for the exercise of judicial authority, a role in which emotion is formally excised.1 What has been called “emotional labor” is one of several key concepts guiding empirical research and offering insights into how judges undertake their work.2 Other related or overlapping concepts include implicit bias, mindfulness, and procedural fairness. Judges have been introduced to these concepts and associated research through several articles published in the journal Court Review over recent years.3 One of these articles, an American Judges Association white paper titled “Minding the Court: Enhancing the Decision-Making Process,” highlights the degree to which these scientific insights are interrelated in their implications for judicial work.4 For example, consideration of these concepts and research initiatives has implications for judicial performance and the conduct of evaluations.

MIS versus Computer Science: An Empirical Comparison of the Influences on the Students’ Choice of Major

A history of declining enrollments in university Management Information Systems (MIS) and computer science (CS) departments in the U.S. considerably impacts both college departments and business organizations that hire graduates. In order to reverse the enrollment trend, an understanding of the important similarities and differences that shape a student’s decision to major in MIS or CS will allow departments to better promote their major, formulate more effective strategies for reaching interested and undecided students, and enhance the fit between student and career. This study directly compared important influences on choice of major for 205 MIS and CS majors at four US universities. Results indicate that the most important influences for both MIS and CS students are interest in technology and monetary compensation. MIS majors, however, are significantly more influenced by others, especially college instructors, parents, friends, and the desire to interact with others. They are also more interested in business and business organizations. CS majors, on the other hand, are more interested in the technology itself and tend to choose CS as a major either in high school or shortly thereafter. Based on these findings, recommendations are provided to aid college departments in attracting and retaining appropriate majors

Size-induced distortions in perceptual maps of visual space

In order to interact with our environment, the human brain constructs maps of visual space. The orderly mapping of external space across the retinal surface, termed retinotopy, is maintained at subsequent levels of visual cortical processing and underpins our capacity to make precise and reliable judgments about the relative location of objects around us. While these maps, at least in the visual system, support high precision judgments about the relative location of objects, they are prone to significant perceptual distortion. Here, we ask observers to estimate the separation of two visual stimuliVa spatial interval discrimination task. We show that large stimulus sizes require much greater separation in order to be perceived as having the same separation as small stimulus sizes. The relationship is linear, task independent, and unrelated to the perceived position of object edges. We also show that this type of spatial distortion is not restricted to the object itself but can also be revealed by changing the spatial scale of the background, while object size remains constant. These results indicate that fundamental spatial properties, such as retinal image size or the scale at which an object is analyzed, exert a marked influence on spatial coding