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.
Results
Showing 1 to 20 of 64 for “"tripping"”.
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The contribution of divided attention to tripping while walking
… health problem requiring urgent intervention. Tripping while walking is one of the most commonly cited reasons for falls, however, little research has focused so far on foot motion characteristics and their contribution to the likelihood of tripping while walking. Even fewer studies have …
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Enhanced dynamic security assessment for power system under normal and fake tripping contingencies.
… this dependency has opened a new threat of fake tripping contingency towards the power system operation. This challenge has motivated this study to ensure that all analytical tools applied during power system operation are not affected under fake tripping contingency, especially on dynamic …
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Minimization of number of gait trials for tripping probability tests using artificial neural networks
… has been used to quantify the probability of tripping (PT) during gait (Best, Begg and James, 1999). MTC data collection is very time consuming and there has been no research conducted to devise a methodology that has the potential to predict long-term histogram characteristics of MTC data …
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Effect of Boundary-Layer Tripping on Turbulence Generation and Trailing-Edge Noise in Transitional Airfoils
… consistent with that of experimental results. Tripping, while it does modify the initial transition process, has little effect on the flow fluctuations near the trailing edge.</p> <p>The calculated spectra of the acoustic field as well as its directivity were found to be in close agreement with …
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Understanding the effects of obesity and age on likelihood of tripping and subsequent balance recovery
… effects of obesity and age on the likelihood of tripping and subsequent balance recovery. Four experimental studies were conducted. The purpose of the first study was to investigate the effects of obesity, age and gender on the likelihood of tripping during level walking. Likelihood of tripping …
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Inelastic Analysis of Tripping Failure of Stiffened Steel Panels due to Stiffener Flange Transverse Initial Eccentricity
… the present methods used to predict the ultimate tripping strength of stiffened panels under compressive axial stress. The current methods involve the use of a bifurcation, or eigenvalue, approach to predicting failure stress. The effects of initial transverse eccentricity of the stiffener are …
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Design and model: Intelligent solid-state current limiter to prevent sympathetic tripping problem on power and energy applications
This paper analyzes the Sympathetic Tripping Problem and proposes and tests a solution to it. To do so, it considers a case study, develops a model to explain this case study, and uses this model to test X. The results reveal that transferring power near the system voltage stability limit is a …
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Tripping the light fantastic: exploring the imaginative geographies of Lord of the Rings ‘film tourism’ in New Zealand
From screen image to imagined spaces, the Lord of the Rings film-tourism experience – that is, tourism to New Zealand apparently motivated by the popular film trilogy which was filmed there – has received much anecdotal attention, yet little scholarly examination. In particular, how tourists are …
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Non-Treadmill Trip Training – Laboratory Efficacy, Validation of Inertial Measurement Units, and Tripping Kinematics in the Real World
… third study was then to explore differences in tripping kinematics between the laboratory and real world using wearable IMUs among community-dwelling older adults. Participants were asked to wear three IMUs (for sternum and both feet) and a voice recorder to capture their responses to real-world …
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A new method of utilising stability study results in applying out-of-step protection to allow observability of rotor angle unstable conditions
… another type of protection, known as out-of-step tripping protection. The tripping protection's main functions are to detect total loss of synchronism and send tripping signals to selected locations in the system to initiate islanding. In this research the application of out-of-step blocking and …
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New methods for protection of future power networks incorporating high penetrations of distributed generation
… loss of protection coordination and sympathetic tripping. Sympathetic tripping is found to be the most 'imminent' problem and a comprehensive simulation based investigation is undertaken to evaluate the extent of sympathetic tripping for typical penetrations of distributed generation. In the …
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Elastic and inelastic analysis of panel collapse by stiffener buckling
… and lateral-torsional buckling ("tripping") behavior of flanged stiffeners subjected to axial force, end moment, lateral pressure and any combination of these. The effects of cross-sectional distortion, postbuckling behavior of the plate (incorporated by considering the plate …
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Identification and Modification of Risk Factors Contributing to Slip- and Trip-Induced Falls
… to reduce risk of falls due to slipping and tripping. The first study investigated the effects of performing occupationally-relevant fatigue-inducing physical work on trip and fall risk. Healthy young adults performed a simulated manual material handling (MMH) task, using either heavy or …
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Characterising intra- and inter-limb gait stability using minimum foot clearance
… postural stability; 2) the risk associated with tripping over an unseen obstacle due to the performance of this task. Poor gait stability and tripping induced falls are contemporary issues related to elderly populations, where characterising MFC variability from one stride to the next can provide …
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Development and Prototyping of a Ground Fault Circuit Interrupter for 3-Phase 480 Volt Systems
… detection, and adopts a previously patented tripping scheme to develop and prototype a digital relay for 3-phase 480 volt systems capable of the sensitivity and speed required for personnel safety. Results demonstrate the feasibility of the concept and suggest commercial development should be …
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Design and implementation of POTT protection scheme using IEC-61850
… the relays. The relays operated in the expected tripping zone and picking up right elements thus validating the results. The time delay between tripping the relays at each end of transmission line was found to be ranging between 3 microsecond to 2.9 millisecond.
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Performance comparison between Dual-blinder and a Phasor-based Out of Step detection functions using hardware in the loop test
… of the commonly used methods to achieve the OOS tripping functionality is the Dual-Blinder Scheme, which compare the locally measured impedance to a set value. In this research, a Phasor-Based OOS tripping function, based on the derivatives of the voltage phase angle difference between the two …
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New Algorithms for Locating Faults in Series Capacitive Compensated Transmission Lines
… in limiting the maintenance time following its tripping due to the occurrence of a permanent fault. Since, an SCCTL acts as a huge corridor of power, its outage will result in huge monetary losses which are directly proportion to the time it remains out of service. In worst case scenario, the …
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The Effect of Mental Fatigue on Risk of Falling
… associated with the risk of slipping and tripping. The study also investigated the efficacy of a 10-minute rest break in mitigating the effect of mental fatigue on those variables. Twenty healthy young adults (10 males and 10 females) participated and completed two experimental sessions. …
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Performance Symmetry and Maximum Joint Torques During Recovery from a Simulated Trip
Tripping causes a significant number of falls in the elderly. These falls often result in medical costs, hospitalization, disability, decrease in quality of life, and sometimes death. Knowledge of why trips occur and the mechanics of successful recovery from a trip is critical to increasing …
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