Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 55 for “"HMD"”.
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Spectroscopic and functional models for Hmd hydrogenase
… More recently, a third class of hydrogenase, Hmd or alternatively [Fe]-hydrogenase, was discovered in methanogenic archaea. This enzyme catalyzes the heterolysis of dihydrogen to a proton with hydride transfer to a carbocation and does not require iron-sulfur clusters. Early work on Hmd …
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Realism, Storytelling and User Experience in HMD-based eXtended Reality for Holocaust Museum
… technologies like Head Mounted Display (HMD)-based Virtual Reality (VR) and Augmented Reality (AR) have made HMD-based eXtended Reality Museum (HXRM) experiences possible. HXRMs can be one of or a combination of the following: an HMD-based AR museum for on-site experience, or an HMDbased …
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Visualisation and manipulation of 3D patient-specific bone geometry using augmented reality
… the intervention on the patient. Three AR HMD systems have been developed to explore the capabilities of the Microsoft HoloLens as an AR HMD to be used in developing an AR HMD medical system. The three AR HMD systems required different software and hardware system architectures, however, …
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Synthesis and stabilities of mononuclear iron (II) dicarbonyls derived from neutral NNS ligands : structural models of the apo-active site of mono-iron (Hmd) hydrogenase
Herein is described the syntheses and characterization of iron dicarbonyl complexes derived from tridentate ortho-substituted Schiff base pyridine/thioether ligands ([subscript R]NNS) and (Fe(CO)₄(Br)₂). Two general synthetic routes are reported for the isolation of such iron carbonyls. First, …
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Evaluating the Effectiveness of Augmented Reality and Wearable Computing for a Manufacturing Assembly Task
… two types of monocular, head-mounted displays (HMD). The first type of HMD was a monocular opaque HMD, and the second was a monocular see-though HMD. Prior to the experiment, all subjects performed a brief training session teaching them how to insert the various components of the motherboard in …
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Effects of Visual Displays on 3D Iteraction in Virtual Environments
… displays, specifically the head-mounted display (HMD) and the Cave Automatic Virtual Environment (CAVE), on 3D interaction tasks involving selection and manipulation. The motivation for this thesis comes from the lack of previous work that has studied the effects of differences between the HMD and …
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Evaluating Mental Workload for AR Head-Mounted Display Use in Construction Assembly Tasks
Augmented Reality (AR) head-mounted display (HMD) provides users with an immersive virtual experience in the real world. The portability of this technology affords various information display options for construction workers that are not possible otherwise. The information delivered via an …
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The Influence of AR Head-Mounted Displays on Spatial Perception and Worker Response in Construction Training
… of Augmented Reality Head-Mounted Displays (AR-HMDs) directly interact with these factors by altering how workers perceive their environment, process information, and manage sensory input. While AR-HMDs offer new opportunities for immersive, adaptive training in real-world construction …
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A Pilot Study for Identifying Tasks and Degrees of Visual Fidelity for Applications of Head Mounted Display Systems for Construction
… applications for AR Head Mounted Display (HMD) systems are still being defined. AR HMD systems have potential to help users interact and experience information in a way that could improve their performance. In the construction sector, workers use black and white construction level of detail …
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Aufbau eines medizinischen Virtual Reality-Labors und Entwicklung eines VR-gestützten neuropsychologischen Testsystems mit einer präklinischen und klinischen Evaluationsstudie
… bis zum immersiven (Head Mounted Display, HMD) VR wurde eingerichtet. Das neuropsychologische Testsystem beinhaltete Aufgabenstellungen zur topographischen Orientierung, zu visuell-räumlichem Lernen und exekutiven Funktionen. Hinsichtlich der Praktikabilität und Benutzerbewertung zeigte …
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The effects of augmented virtuality on presence, workload, and input performance
Head-Mounted Displays (HMDs) offer, more than any easily accessible technology that has come before, the sensation of presence – that feeling that you are “really there” in a virtual world. However, HMDs cut the wearer off from the real world, making even trivial interactions, such as having a …
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Understanding the Effects of Tablet-based Virtual Reality (VR) Viewing Systems for an Inclusive, Cross-device Virtual Environment
… a virtual reality head-mounted display (VR-HMD) disconnects users from the real- world context that they are physically in. While one solution is to have everyone in the room wear VR-HMDs, this is not inclusive for all users. For example, children are not recommended to wear VR-HMDs due to …
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Identification Of System Design Features That Affect Sickness In Virtual Environments
… Analyses on three types of VR systems (i.e., HMD, BOOM, and CAVE) revealed that BOOM and CAVE systems have similar sickness profiles, which are different than the HMD system profile. Moreover, the results showed that the overall severity of sickness was greater in HMD systems than in BOOM and …
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Effects of display type and steering force feedback on performance in a medium-fidelity driving simulator
… of the four roadway segments with the use of an HMD. Results for active steering force feedback, however, showed a significantly negative effect on driving performance with an increase in average lane deviation. Descriptive statistics showed that participants preferred the HMD and D-V equally and …
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User-centered Virtual Environment Assessment And Design For Cognitive Rehabilitation Applications
… modules of a user-centered head-mounted display (HMD) assessment battery, specifically resolution visual acuity and stereoacuity. Resolution visual acuity and stereoacuity assessments provide information about the image quality achieved by an HMD based upon its unique system parameters. When …
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Hydrogenase Models and Studies Based on Iron Carbonyl Chelate Complexes
… NRVS, generating new insights into [FeFe]- and Hmd-H 2ases. A comproportionation route permits selective labeling of one iron center of the diiron unit with 57Fe. Also, the comproportionation route is finding further utility in generating heterometallic dinuclear complexes.
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The effects of fidelity on navigation in virtual environments
… displayed via a tracked head mounted display (HMD), showed dramatic performance benefits over the use of stationary desktop displays, and a rotationally tracked HMD that required abstract input for translational movement. Proprioceptive and vestibular feedback allowed participants to navigate a …
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Spatial sensitivity of low-induction-number frequency-domain electromagnetic-induction instruments
… with a large difference between horizontal (HMD) and vertical (VMD) orientations of the transmitter and receiver dipoles. In some regions, the calculated magnetic field intensity with the perturbation was less than that calculated for the host without the perturbation. This occurred for both …
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Immersive scuba diving simulator using virtual reality
… they swim. An Oculus Rift head-mounted display (HMD) and a pair of headphones delineate the visual and auditory ocean scene. Additional senses simulated in Amphibian are breathing-induced motion, temperature changes, and tactile feedback through various sensors. Twelve experienced divers compared …
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Immersive Space to Think: the Role of 3D Immersive Space in Sensemaking of Textual Data
… Think (IST) in a 3D virtual environment using an HMD. The study results show that the concepts of Space to Think extend naturally to 3D immersive space and that the 3D space offers some additional opportunities. With immersive space, analysts i) organized in a surrounding virtual sphere, ii) …
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