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 204 for “"Exposure time"”.
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Reduced exposure time as a method of minimising the impact of vibration on electronic speckle pattern interferometry
Includes bibliographical references.
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Increasing Screen Exposure Time Harms Inhibitory-Control Network in Developing Children: A Two Years Follow-up of the ABCD Study
… it is critical to monitor the effect of screen exposure time on developing children’s behavior and nervous system. Screen use boosts information accessibility and, therefore, may delay the development of the inhibitory control networks in children, who are vulnerable to immediate …
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An in-vitro comparison of working length determination between a digital system and conventional film when source-film/sensor distance and exposure time are modified
… determining working lengths when modifying exposure time and source-film/sensor distance. Twelve teeth with size 15 K-flex files at varying known lengths from the anatomical apex were mounted in a resin-plaster mix to simulate bone density. Each tooth was radiographed while varying the …
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The promise and perils of molecular combing
… three challenges: pH of buffer solution, NaOH exposure time, and halogenated thymidine exposure time in yeast (Saccharomyces cerevisiae). A serial pH experiment is necessary to determine optimal pH in any given laboratory. The optimal NaOH exposure time is 20 minutes. Despite using flow …
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Electromagnetic effects on soybeans
… of EM field of a given frequency, power and exposure time. Soybean was chosen because it could be used as a potential source for biofuel. Of the four soybean genotype used, Magellan showed better germination rate than Maverick, SS97-6946 and William82. Results on Magellan for repeat …
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Seminal plasma and freeze-thaw injury to bovine sperm
… conducted to determine the influence of sperm exposure to seminal plasma on freeze-thaw injury. In Experiment I, 14 ejaculates from 10 Holstein bulls were held at 32°C for either 0, 20, 40, 60, 120 or 240 min followed by dilution in egg yolk-citrate. All treatments were maintained at 32°C for …
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Effects of Prosocial Video Games on Resulting Prosocial Behaviors
… thoughts via the General Learning Model. The exposure time in this past research has varied widely, so an experiment that both replicates existing research and looks at exposure time was developed. In this study participants played either a prosocial game, or a neutral game for 10 or 20 …
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Characterization of photocurable networks in real-time and post-exposure
… molecular-level understanding of the effects of exposure intensity and exposure time on photopolymer network formation. These techniques enable detailed characterization of photopolymer behavior in real-time and post-exposure. In situ dynamic mechanical analysis was performed to observe the …
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A holographic system that records front-surface detail of a scene moving at high velocity
… is known that any motion of the scene during the exposure of a hologram results in a spatial modulation of the recorded fringe contrast. On reconstruction this produces a spatial amplitude modulation of the reconstructed wavefront that tends to blur out the image. This paper discusses a novel …
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DEHYDRATION AND MICROBIAL IMPACTS ON WATER UPTAKE AND POSTHARVEST QUALITY OF CUT LILY
… discontinuous water uptake, and the duration of exposure in air varies depending on the handling procedure. The critical duration of desiccation that would cause irreversible damage to lilies is still unknown. Furthermore, commercial lily growers have questioned the necessity of cleaning buckets …
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Morphology and Mechanical Properties of High Density Polyethylene Exposed to Chlorinated Water
… polymer morphology as a function of exposure time are evaluated and compared with tensile and creep test data. Additionally, data are evaluated as a function of molecular weight, to eliminate variations in sample thickness, processing, or variation in oxidative environment conditions. …
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Toxicity of manufactured nano-ZnO to Lemna minor
… insulators. This can result in the unintended exposure of human beings to nano-ZnO and will inevitably result in the release of nano-ZnO in to the environment. Thus, it is necessary to assess the risk of nano-ZnO to the environment. In this thesis the toxicity of nano-ZnO was analysed using the …
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A Dynamic Model Of The Human/cooling System/clothing/environment System
… resistance have great effects on the maximum exposure time; PPE resistance and cooling water flow rate do not have much impact on the maximum exposure time. For air cooling, cooling air flow rate, inlet temperature, relative humidity and liner resistance have great effects on the maximum …
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Studies of vacuum ultraviolet absorption spectra of simple gases
… by a 2450 Mc/sec microwave diathermy unit. The exposure time varied from 30 minutes to four hours depending upon the slit width. Wavelength standards were provided by atomic emission and absorption lines of impurities present in the light source and also by carbon monoxide emission.</p>
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Vibration-induced white finger in dockyard employees
… vascular condition associated with occupational exposure to hand-transmitted vibration. The fingers are prone to intermittent blanching attacks which may be triggered by cold conditions and are usually accompanied by numbness and tingling or pain. VWF has been associated with the use of various …
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Characteristic of renewable polymer incorporated with stabilizer to characterize the endurance to ultra voilet irradiation exposure
… endurance of renewable polymer to UV irradiation exposure. The morphological structure and porosity of renewable polymer shows no significant changes after UV irradiation exposure. As the loading of TiO2 increased (up to 10 % of monomer weight), the thermal degradation temperature were increased …
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Bayesian treed distributed lag models
… there is interest in regressing an outcome on exposures observed over a previous time window. This frequently arises in environmental epidemiology where either a health outcome on one day is regressed on environmental exposures (e.g. temperature or air pollution) observed on that day and …
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Ultraviolet C Inactivation of <em>Salmonella enterica</em> in Raw Chicken Juice on Food Contact Surfaces with the Contamination Sanitization Inspection and Disinfection (CSI-D+) Device
… to lower irradiance (5 mW/cm²). The higher exposure time of 30 s yielded statistically significant improvements compared to the 15 s exposure time. Among the food contact surfaces, PTFE demonstrated a significantly higher reduction (0.52-1.00 log CFU/ml) in <em>S. enterica </em>following …
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Behaviours of bifilms in A356 alloy during solidification: developing observation techniques with 3-D micro x-ray tomography
… diameter and scanning conditions, including exposure time, magnification, rotation angle and rotation-step angle. Following scanning, the specimens were re-melted for 1, 2, 3, 4 and 5 minutes at 745 °C, and then quenched in the air until solidified. They were then re-scanned to establish the …
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