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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Decision matrix for liquid loading in gas wells for cost/benefit analyses of lifting options

Park, Han-Young 10 October 2008 (has links)
Field-proven solutions already exist to reduce the loss of gas production when liquid loading begins to occur. However, the choice of remedial technique, its feasibility, and its cost, vary considerably depending on a field's location, size export route, and the individual operator's experience. The selection of the best remedial technique and the timeframe within which the remedial action is undertaken are critical to a project's profitability. Although there are literature reviews available regarding solutions to liquid loading problems in gas wells, a tool capable of helping an operator select the best remedial option for a specific field case still does not exist. This thesis proposes a newly developed decision matrix to screen the possible remedial options available to the operator. The matrix can not only provide a critical evaluation of potential solutions to the problem of liquid loading in gas wells vis-à-vis the existing technical and economic constraints, but can also serve as a reference to operators for investment decisions and as a quick screening tool for the selection of production optimisation strategies. Under its current status of development, this new tool consists of a decision algorithm built around a decision tree. Unlike other data mining techniques, decision trees quickly allow for subdividing large initial datasets into successively smaller sets by a series of decision rules. The rules are based on information available in the public domain. The effectiveness of the matrix is now ready to be tested against real field datasets.
12

Prevention of occupational injuries caused by manual handling in health care settings costs and benefits /

Ng, Kim-ching. January 2009 (has links)
Thesis (M.P.H.)--University of Hong Kong, 2009. / Includes bibliographical references (p. 36-38).
13

An investigation of the maximum acceptable weight of lift for bags

Osgood, Richard Thomas 08 1900 (has links)
No description available.
14

A dynamical systems investigation of loaded jump squat kinematics

Kruger, Sarah E. January 2005 (has links)
The purpose of this project was to assess the coordination and performance of the jump squat movement for multiple loading conditions. Seventeen male subjects between 18 and 30 years of age, performed two jump squats for each loading condition, 0-60% of their one repetition maximum (1 RM) incremented by 10% for each trial. Video capture was used to assess kinematics and a force platform in combination with a linear position transducer was used to determine power. All of the peak power values occurred between 0% and 30% of 1 RM and there was an overall linear decrease in power output from 0-60% (p = 0.000). The shank-thigh and thigh-trunk mean absolute relative phase (MARP) values were shown to have linear increases from 0-60%, with p-values of 0.003 and 0.014 respectively. The MARP values calculated from 0-30% were significantly different than those at 60% for both segmental relationships. These results indicate that optimal jump squat performance occurs from 0-30% of 1 RM. / School of Physical Education, Sport, and Exercise Science
15

Methods for determining power output and factors affecting the optimal load during free-standing jump squats

Newell, Philip B. January 2005 (has links)
The purpose of this thesis was to determine the validity of an linear position transducer / force platform method as compared to a 2D video analysis / force platform method for determining power output during free-standing jump squats, and to examine the effects of strength level and sport background on the optimal load for power output. The results showed that the LPT method was not suitable for measuring power output during free-standing jump squats. In addition, the optimal load range was determined for the VA method to occur between 10% and 20% of a predicted 1RM squat. Strength level did not have a significant affect on the optimal load, however, there were differences in strength and power output by sport. It is recommended that future research examine the specific limitations of an LPT for measuring un-constrained movements, as well as the effects of athletic and training background on the optimal load. / School of Physical Education, Sport, and Exercise Science
16

Can a static lifting test predict dynamic ability in subjects with low back pain? :

Field, Rowena. Unknown Date (has links)
Thesis (MPhysio)--University of South Australia, 1998
17

Determination of the range of safe-comfortable lifting postures using the aesthetic ergonomics theory

Salazar, Nicolas F. January 2009 (has links)
Thesis (Ph. D.)--West Virginia University, 2009. / Title from document title page. Document formatted into pages; contains xii, 196 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 141-146).
18

The development of a dynamic scissor lift model

Hartsell, Jared J. January 2010 (has links)
Thesis (M.S.)--West Virginia University, 2010. / Title from document title page. Document formatted into pages; contains vii, 55 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 53-54).
19

The effects of strength training on arterial structure and function in middle-aged and older adults

Cortez-Cooper, Miriam Yvette, Farrar, Roger P., Tanaka, Hirofumi, January 2005 (has links) (PDF)
Thesis (Ph. D.)--University of Texas at Austin, 2005. / Supervisors: Roger P. Farrar and Hirofumi Tanaka. Vita. Includes bibliographical references.
20

Personality characteristics of three groups of weight-trainers

Leithwood, Kenneth Arthur January 1967 (has links)
The personality characteristics of three groups of Weight-Trainers were investigated in order to determine: 1. if Weight-Trainers, as a group differed significantly from the general population; 2. if Weight-Trainers differed from one another when compared on the basis of their motivation for participation; 3. if one group of Weight-Trainers deviated from the norm more than the other groups. Cattell's Sixteen Personality Factor Questionnaire was administered to forty-five subjects. Fifteen of these subjects trained as a conditioning activity for another sport, fifteen trained to improve their physique and fifteen trained to increase their strength for Weight Lifting competitions. Results, derived by the methods of an analysis of variance and "t" tests, indicated that: 1. Weight-Trainers, as a group, differ at the one per cent level from the general population on measures of intelligence, character strength, naivete, extroversion and self-sufficiency; 2. Weight-Trainers are a relatively homogeneous group of athletes. / Education, Faculty of / Curriculum and Pedagogy (EDCP), Department of / Graduate

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