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 104 for “"Dwell Time"”.
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Dwell time relationships for urban rail systems
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1990.
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Variable dwell time verification strategies for CDMA acquisition with application to GPS signals
… synchronisation can be achieved in the minimum time. The synchronisation process involves two steps: coarse synchronisation (acquisition) and fine synchronisation (tracking). The treatment begins with the cell-level decision-making strategy, where a 'cell' describes a particular estimate of the …
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Dwell Time of Peripheral Intravenous Catheters and Incidence of Phlebitis: A Randomized Controlled Study
… the incidence of phlebitis in relation to dwell time and other aspects of IV therapy.<br> 2. To examine a sample of acute hospitalized patients whose IV catheters are changed at 48 hours, at 72 hours, and over 72 hours.<br> 3. To identify the incidence of phlebitis with each sample …
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Bus Seating in Arlington, Virginia: ART Passenger Demographics, Seating Preferences and Dwell Time Efficiency
… seating preferences and boarding and alighting times within the system. The data collection methodology employed digital stopwatch timings of boardings and alightings in conjunction with a coordinate-based spreadsheet seating chart tracking system in order to document passenger movements and …
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Dwell Time for Import Transit Containers at Dar es Salaam Port: An Analysis of the Role of Free Storage time
Dwell time is the principal indicator of the Port’s efficiency. Dwell time can be broken into three components: operational dwell time, transactional dwell time and discretionary dwell time. All customs and terminal inefficiencies are absorbed in the first two components above. The aim of this …
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A study of rolling adhesion in braking
The effect of normal load, contact velocity, and dwell time on the coefficient of adhesion at slip in braking was investigated. A test rig that simulated locomotive wheel/rail interactions was used for the experimentation. The results indicated a drop in the coefficient of adhesion with increasing …
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Dynamics of Germ Cell Specific Stable Transcriptional Complexes in Xenopus Oocytes
… a transcription factor has only a very short dwell time of seconds or minutes on its appropriate DNA sequence. On the other hand, differentiated cell strains retain their differentiated state for many years. Does this mean that a transcription factor molecule must be exchanged for another …
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Surface wettability studies of PDMS using flame plasma treatment
… the PDMS surface to the inner flame cone; b) the dwell time of the PDMS under the flame. The study concluded that the same surface wettability can be achieved through different combinations of distance and dwell time. The shortest dwell time needed to induce a contact angle of 100 or less on the …
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Quantitative evaluation of rejuvenators to restore embrittlement temperatures in oxidized asphalt mixtures using acoustic emission source location techniques
… approach after two, four, six, and eight weeks dwell time after being rejuvenated. Iterative and non-iterative acoustic emission source location approaches were used to determine the location of cracks inside the specimens in a low temperature environment. It was observed that the rejuvenator …
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L-band RFI measurement system simulation and investigation
… surface of a million square metres, one hundred times larger than the biggest receiving surface now in existence. The SKA core array will have to be located in a remote area. Therefore countries interested in hosting the SKA core array were requested to perform Radio Frequency Interference …
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Optimal Parameter Values for Accurate and Repeatable Nanoindentation of Human Trabecular Bone
… parameter values for thermal drift correction time, dwell time, and loading rate that can be used to obtain accurate and repeatable material properties from human femoral trabecular bone through experimentation and statistical analysis. All testing was conducted using a single nanoindenter on a …
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Analyzing the Effects of Display Characteristics and Cognitive Variables on Performance Using Keystroke and Eye Movement Data
… information displays evolved from using reaction time and subjective data as dependent variables to using oculometric measures. In the current research conventional performance measures are coupled with oculometric measures to evaluate the influence display characteristics and cognitive variables …
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SKU segmentation strategy for a global retail supply chain
… (i.e. an expedited supply chain for time-sensitive products or an efficient supply chain if there is opportunity to reduce cost and still meet demand). We start by mapping the current supply chain process using historical data and interviews with employees. The key piece of the …
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Novel Ignition Approaches for Improved Hydrogen Ignition
… H₂ double injection ignition with varying dwell times. Experiments utilized a constant-volume combustion chamber (CVCC) with optical access, replicating compression-ignition engine conditions. Baseline environment: 23.8kg/m³ gas density, 21vol.% O₂, 1000K core temperature. Analysis methods: …
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Optimisation of Rail-road Level Crossing Closing Time in a Heterogenous Railway Traffic: Towards Safety Improvement - South African Case Study
… and road traffic intersects. Thus, long waiting time is expected at the level crossings due to the increase in traffic volume and heterogeneity. Furthermore, safety and capacity can be severely compromised by long level crossing closing time. The emphasis of this study is to optimise the …
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Nanomechanical characterization of asphalt
… materials area have selected a loading rate and dwell time (i.e., the peak load is kept constant for a few seconds before unloading) to avoid or minimize the viscous effect of a material. No studies have attempted to examine the effects of dwell time and loading rate on viscous materials such as …
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Characterization of temperature profile in furnace and solubility of iron in silicon
… three sub-tasks: (a) to determine an appropriate dwell time, characterize the temperature profile within a vertical high-temperature tube furnace as a function of depth and flow rate, (b) to use this information to diffuse iron into silicon at a known temperature, and (c) to measure the …
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Phase stabilization of laser beams in a cold atom accelerometer
… in noise reduction. At an atom interferometer dwell time of 1 msec, active laser phase stabilization improved the atom interferometer sensitivity; at an atom interferometer dwell time of 8msec, an improvement was no longer evident. Improvements to the laser phase stabilization system are …
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Elements of design that affect aesthetic evaluation
… of POP-displays and how this in turn may affect dwell time, product contact and purchase probability. The influence of design elements upon aesthetic evaluation is of particular interest to designers as research has shown that people no longer buy products for their functionality but for their …
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