Dissertations / Theses: 'Microscopy – Equipment and supplies'

1

Harty, Michael David. "Statistical process control as a tool for expert system diagnostics." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/24853.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Al-Ansary, Hany A. "Investigation and improvement of ejector-driven heating and refrigeration systems." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/36540.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Leane, Robert B. "Scanning tunnelling microscopy." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.291716.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Bares, John Alvin 1951. "Preliminary equipment selection analysis of mining shovels and haulage trucks." Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/558076.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Rothsching, Norman. "The effect of shaft stiffness on the performance of the ice hockey slap shot." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0001/MQ43940.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Villaseñor-Herrera, Alejandro. "Recoil effect of the ice hockey stick during a slap shot." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=81450.

Full text

Abstract:

This thesis examined the 'recoil' effect of the ice hockey stick shaft during a stationary slap shot. Nine subjects were tested. Four were classified as 'elite' and the remaining five as the 'recreational' group. Their performances were evaluated by simultaneously recording stick movement and bending from high-speed video capture (1000 Hz) and puck acceleration from a triaxial accelerometer positioned inside the puck. Data were analyzed with a one-way ANOVA for several dependant variables including final puck velocity, stick shaft bending, blade-puck contact time and stick kinetic energy. The results indicated that: (1) the puck velocity was influenced by skill level, blade-puck contact time and stick bending energy but not puck acceleration. Further studies are needed to address the influence of events before and after blade-puck contact as well as the strength of the player on the mechanical energy and impulse given to the puck.

APA, Harvard, Vancouver, ISO, and other styles

7

Dowler, Patrick McLean 1983. "Effects of ice hockey facial protectors on response time and kinematics." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=111600.

Full text

Abstract:

Ice hockey facial protectors are essential to prevent eye and dental injuries but must also not encumber vision and, in turn, players' performance. The purpose of this study was to investigate the effects of three different facial protection conditions on response time (RsT) and kinematics in a goal directed pointing task: helmet (control), visor, and cage. A 13 light target array and six-camera Vicon Mx system were used to collect response time and kinematic data. Subjects recruited were 16 male and 12 female varsity ice hockey players (n=28). Results demonstrated that although kinematics remained largely unaffected, throughout the visual field test RsT increased significantly with the cage (23 ms) as well as delayed head movement for both the visor (14 ms) and cage (18 ms). These differences may well represent a functional disadvantage to a player's performance given the dynamic, open environment where multiple players contest for puck possession. In summary, further research is warranted to achieve both optimal performance and safety.

APA, Harvard, Vancouver, ISO, and other styles

8

Aspelund, Kristinn A. "Optimization of plate-fin-and-tube condenser performance and design for refrigerant R-410A air-conditioner." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/19488.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Triantafillopoulos, Nicholas G. "Fluid dynamics of short-dwell blade coater ponds and their relationship to cross directional coat weight nonuniformities." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/5592.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Woo, Timothy Keith. "A three dimensional comparison of elite and recreational ice hockey slap shots /." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=81455.

Full text

Abstract:

The purpose of this thesis was to examine the three dimensional kinematic differences between elite and recreational ice hockey players while performing a stationary slap shot. Ten subjects, five elite-level players and five recreational players, each performed five stationary ice hockey slap shots. Data were collected using the UltratrakRTM electromagnetic system (Polhemus Inc., Burlington, VT, USA) at 60 Hz. Kinematics of the torso, arms and hockey stick were examined using a multiple analysis of variance (MANOVA). The results indicated that: (1) the elite subjects shot significantly (p < 0.05) faster due to the translational movement aspect of the stick; (2) the proximal to distal kinematic chain sequence of the elite subjects was better than the recreational subjects; and (3) the elite subjects showed less variability in stick movement within groups, than the recreational subjects. Further studies are needed to address kinematics of the lower limbs and of different ice hockey stick skills.

APA, Harvard, Vancouver, ISO, and other styles

11

Wu, Tong-Ching Tom. "The performance of the ice hockey slap and wrist shots : the effects of stick construction and player skill." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33949.

Full text

Abstract:

This thesis was to examine the interaction of players' skill level, body strength, and various types of stick construction and stiffness on the performance of the hockey shots. Forty subjects were tested, and each subject performed the slap and wrist shots with different stick shaft constructions and stiffness. Shot mechanics were evaluated by simultaneously recording of ground reaction forces, stick movements and peak puck velocity. Data analyzed with a 4-way ANOVA for several dependent variables. The results indicated that: (1) the slap shot was faster than the wrist shot corresponding to greater vertical force, stick bending and hand placement; (2) the puck velocity was influenced by skill level and body strength not stick type; and, (3) the skilled players generated greater vertical force and stick bending by adjusting their hand positions. Further studies are needed to address the specific stick material and construction properties.

APA, Harvard, Vancouver, ISO, and other styles

12

Huppert, Theodore. "A lockout/tagout system for Energy Solutions International Manufacturing Facility in Mendota Heights, Minnesota." Online version, 1998. http://www.uwstout.edu/lib/thesis/1998/1998huppertt.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Bennink, Dirk. "Design of solids separation equipment : a thesis." Thesis, Queensland University of Technology, 1989. https://eprints.qut.edu.au/36450/1/36450_Bennink_1989.pdf.

Full text

Abstract:

This work covers a reassessment of the 'Hot Break' separation problem by a mechanical engineer from outside the brewing industry. The solid-liquid separation problem was therefore investigated without prior knowledge of constraints or current practices. During the brewing of beer an unwanted, insoluble precipitate, 'trub' is formed, reported to have undesirable effects on the finished beer quality. The existing equipment, 'whirlpool' separators, designed to eliminate this 'trub' performed poorly, allowing much of the precipitate to be carried over to subsequent processes. To remedy the problem, a program to either: 1. design suitable replacement separators or; 2 • modify existing separators to enhance their performance, was pursued. To evaluate possible alternative separators determination of the relevant physical (solid, liquid) properties, measurement of the process parameters at peak production, and review of the chemical constraints was necessary. Performance of the current whirlpool separators was ascertained to establish the extent of the ~xisting problem. Existing efficiencies set a benchmark for comparison against proposed alternatives. Through exhaustiv~ literature review, consultive advice, a series of experiments and rig testing, an extensive range of separation techniques was evaluated, A review of over forty-five reports on whirlpool performance and design practices, the majority of which being the basis of doctoral dissertations, combined with the evaluation of a third whirlpool at Milton Brewery revealed whirlpools to be the most suitable and logical choice. It seemed that the inherent problems in whirlpool design stem from the haphazard approach adopted by the brewing industry. To redress this problem an exp~rimental program to optimize whirlpool tank geometry and operation was initiated. Both experimental and hardware design were fundamentally different to all previous endeavors to establish whirlpool design guidelines. A pilot plant was designed and commissioned such that direct measurement of the 'whirlpool' response independent of other secondary effects was possible. The experimental program produced · over two hundred comparative whirlpool indices over a range of geometric and operational configurations. These suggested that whirlpool performance could be optimised in shallow vessels using low inlet velocities. Finally, the need for secondary separators to be used in conjunction with whirlpool tanks would diminish with improved primary separation.

APA, Harvard, Vancouver, ISO, and other styles

14

Sutherland, Robert Allan, and mikewood@deakin edu au. "Exposure to fumes and gases during welding operations." Deakin University, 1998. http://tux.lib.deakin.edu.au./adt-VDU/public/adt-VDU20050902.143604.

Full text

Abstract:

The exposure to fumes and gases is one of the hazards associated with welding operations. Apart from research conducted on the mechanism of fume and gas formation and the relationship between fume formation rates and common welding parameters, little is known about the exposure process during welding. This research project aimed to identify the factors that influence exposure, develop an understanding of their role in the exposure process and through this understanding formulate strategies for the effective control of exposure during welding. To address these aims a literature review and an experimental program was conducted The literature review surveyed epidemiological, toxicological and exposure data. The experimental program involved three approaches, the first, an evaluation of the factors that influence exposure by assessing a metal inert gas/mild steel welding process in a workshop setting. The second approach involved the study of exposure in a controlled environment provided by a wind tunnel and simulated welding process. The final approach was to investigate workplace conditions through an assessment of exposure and control strategies in industry. The exposure to fumes and gases during welding is highly variable and frequently in excess of the health based exposure standards. Exposure is influenced by a number of a factors including the welding process, base material, arc time, electrode, arc current, arc voltage, arc length, electrode polarity, shield gas, wire-to-metal-work distance (metal inert gas), metal transfer mode, intensity of the UV radiation (ozone), the frequency of arc ignitions (ozone), thermal buoyancy generated by the arc process, ventilation (natural and mechanical), the welding environment, the position of the welder, the welders stance, helmet type, and helmet position. Exposure occurs as a result of three processes: the formation of contaminants at or around the arc region; their transport from the arc region, as influenced by the entry and thermal expansion of shield gases, the vigorous production of contaminants, thermal air currents produced by the heat of the arc process, and ventilation; and finally the entry of contaminants into the breathing zone of the welder, as influenced by the position of the welder, the welders stance, helmet type, and the helmet position. The control of exposure during welding can be achieved by several means: through the selection of welding parameters that generate low contaminant formation rates; through the limitation of arc time; and by isolating the breathing zone of the welder from the contaminant plume through the use of ventilation, welder position or the welding helmet as a physical barrier. Effective control is achieved by careful examination of the workplace, the selection of the most appropriate control option, and motivation of the workforce.

APA, Harvard, Vancouver, ISO, and other styles

15

King, Matthew David. "Nanoparticle-Based Biosensor System for Rapid Detection of Target DNA Sequences." Fogler Library, University of Maine, 2008. http://www.library.umaine.edu/theses/pdf/KingMD2008.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Vinamata, Xavier F. "Development of a noise rejecting sensor for conformal hull arrays." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/17226.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Lemair, Mylene. "Evaluation of impact attenuation of facial protectors in ice hockey helmets." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101599.

Full text

Abstract:

The purpose of this study was to investigate whether ice hockey facial protectors can decrease overall head acceleration during blunt impacts as well as to identify if attenuation differences exist between visors and cages. Commercial models of three cages and three visors were assessed. Blunt impacts were simulated permitting the measurement of peak accelerations (PA) within the surrogate head form. Results indicated that indeed face protectors in combination with helmets substantially reduced PA during blunt impacts within threshold safety limits (below 300 g's). In general, cages showed lower PA than visors (p=0.004). Differences between models were also observed during repeated impacts and impact site (p=0.0001, p=0.007). In conclusion, this study demonstrates that facial protectors function beyond their role in preventing facial injuries, complementing the role of the helmet in attenuating head deceleration during impact. Consequently, the utilization of facial protectors may reduce the severity and incidence of mTBI.

APA, Harvard, Vancouver, ISO, and other styles

18

黎自強 and Chi-keung Peter Lai. "Protocol-led weaning of mechanical ventilation in adult intensive careUnit." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B40720895.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

劉玉賢 and Yuk-yin Lau. "Effect of treatment interference protocol (TIP) on the use of physicalrestraints in ICU." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B4072170X.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

De, Jonge Desleigh. "Putting technology to work : experiences of people using assistive technology in the workplace /." St. Lucia, Qld, 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16744.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Zielinskie, David Alphonse 1959. "Automatic control and data analysis of a multichannel millimeter wave radiometer." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276787.

Full text

Abstract:

This thesis describes a multi-channel millimeter wave radiometer control system that will be used for atmospheric water vapor and temperature profile retrievals. The system consists of four subsystems which provide a total of nine frequency channels, a steerable reflector to permit slant-path measurements at different zenith angles, and a host computer for analyzing the data. The nine channels span the water vapor and oxygen absorption lines in the 20 to 60 GHz range. A distributed processing architecture is implemented to control the system. Each of the subsystems employs a signal processor and a microcontroller, which are configurable from the host. The signal processor filters the receiver's output, while the microcontroller oversees the radiometer, accepts data from the signal processor and communicates with the host. The host executes a custom shell that allows it to concurrently accept data from the subsystems, position the reflector and execute user analysis programs.

APA, Harvard, Vancouver, ISO, and other styles

22

Webster, James. "The perception of comfort and fit of personal protective equipment in sport." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/6242.

Full text

Abstract:

During the design of sports equipment, the main focus is usually on physical performance attributes, neglecting key subjective factors such as feel and comfort. The personal protective equipment worn in sport is a typical example, where injury prevention has taken precedence over user comfort, but it is anticipated that with a new approach to the design process, comfort can be improved without sacrificing protection. Using cricket leg guards and taekwondo chest guards as an example, this study aimed to develop a systematic method for assessing user perceptions and incorporating them into the design process. Players perceptions of the factors that influence the comfort of cricket leg guards and taekwondo chest guards were elicited through the use of co-discovery sessions, focus groups and individual interviews, and analysed through an inductive process to produce a comfort model. The relative importance of each different comfort dimension was identified through the use of an online questionnaire utilising the analytical hierarchy process method. Through the combination of these methods, six general dimensions were identified with a weighting regarding the amount to which each one determines a user's perceived comfort. For both cricket and taekwondo, the majority of players ranked Fit as the most important factor affecting comfort. Experimental procedures were developed to objectively test the Fit of cricket leg guards, with regards to batting kinematics, running performance and contact pressure. These methods were combined with subjective assessments of leg guard performance, to determine if there was a relationship between users perceived comfort and objective test results. It was found that shot ROM and performance were not significantly affected by cricket leg guards, despite perceptions of increased restriction whilst wearing certain pads. Wearing cricket leg guards was found to significantly decrease running performance when compared to running without pads (p<0.05). In addition, it was found that the degree of impedance depended on pad design and could not solely be attributed to additional mass. These results correlated with the subjective assessment of three different leg guards, with respondents identifying the pad which had the largest influence on their running biomechanics and impeded their performance the most, as the most restrictive pad. Contact pressure under the pad and straps was also measured for four different leg guards whilst running. The results found that the top strap applied the greatest amount of pressure to the leg, especially at the point of maximum knee flexion. The peak pressure under the top strap was found to reach up to three times that of any other area of the pad. These results were reflected in the subjective assessment of the leg guards, with all nine subjects identifying the top strap as an area of discomfort for certain pads. The results also suggested there was a preference for pads with a larger more consistent contact area, as pad movement was perceived to increase when contact area variation was greater. Finally the results from this research were used to develop a product design specification (PDS) for a cricket leg guard, specifying size, mass, contact pressure and shape. The PDS was used to develop a concept design which would maximise comfort, whilst maintaining protection.

APA, Harvard, Vancouver, ISO, and other styles

23

Chau, Ka Lok. "Automated control in high resolution electron microscopy." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283920.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Söderström, Charlotte. "Measuring microbial activity with an electronic tongue /." Linköping : Univ, 2003. http://www.bibl.liu.se/liupubl/disp/disp2003/tek816s.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Gunn, Bernard. "Detection of needle wear in an automated sewing process." Thesis, Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/8533.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Wu, Wei-Chung. "On-chip charge pumps." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/13451.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Gray, Michael Dean. "An experimental investigation of the anomalous behavior of underwater acoustic volume displacement sensors." Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/16796.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Sadler, Emma May. "Design analysis of a finned-tube condenser for a residential air-conditioner using R-22." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/17951.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Hakim-Zadeh, Roghieh. "Durability of ice hockey helmets to repeated impacts." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29505.

Full text

Abstract:

This study evaluated the mechanical durability of ice hockey helmets for multiple impacts at defined energy levels. A monorail drop testing apparatus was used to conduct controlled impact tests according to the CSA standard (CAN/CSA-Z262.1-M90). Five ice hockey helmet models were tested, for a total sample of 45 helmets. All helmets were impacted up to 50 times at each of in four different locations (i.e. front, right side, back, and crown), at one of 40, 50 or 60 J of kinetic energies. In general, by increasing the impact energy, the impact acceleration attenuation properties of the helmets was decreased significantly (from 4% to 80%). Although all the helmets meet the CSA standards, attenuation properties were found to be substantially reduced beyond three repeated impacts and above 40 J impact energy. In particular, all helmets showed effective multiple impact attenuation properties at the crown, front, and rear sites; however, poor multiple impact attenuation durability was evident at the side.

APA, Harvard, Vancouver, ISO, and other styles

30

Lomas, Sarah A. "Effects of puck mass on shot velocity of female ice hockey players." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=81360.

Full text

Abstract:

The purpose of this study was to examine the effect of puck mass on shot velocity of female ice hockey players. The contributions of upper body strength and skill level to shot velocity were also examined. Female varsity and recreational players (n = 29, age = 21.3 yr) performed shooting tests on ice. The participants shot 20 light weight (5 oz) and 20 regulation (6 oz) pucks, using 4 different types of shots (standing wrist shot, standing slap shot, skating wrist shot, skating slap shot). The on-ice tests were followed-by 3 musculoskeletal tests; predicted 1 repetition maximum (1 RM) bench press, hand grip, and sit-ups. The light weight puck resulted in a significantly higher velocity compared to the regular weight puck (P < 0.05). The average shooting velocity was 1.4 km/h higher with the light weight puck compared to the regular puck (69.8 vs. 68.4 km/h) based on overall means (4 shots x 2 pucks). Positive correlations were found between overall shot velocity and musculoskeletal tests of hand grip (r = 0.81), predicted 1 RM bench press (r = 0.77), and sit-ups (r = 0.48). These results are discussed in relation to literature on the women's ice hockey and physiology.

APA, Harvard, Vancouver, ISO, and other styles

31

Kress, Reid Leonard. "Adaptive model-following control for hyperthermia treatment systems." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184430.

Full text

Abstract:

The purpose of this research was to develop three real-time adaptive temperature controllers for hyperthermia heating systems. Each scheme is made adaptive by using a transient Gaussian estimation routine to estimate the tissue blood perfusion and by then using these estimated values either in an optimizing routine, or in an observer, or in both. The optimizing routine uses a steady-state Gaussian estimation technique to optimize the power distribution until the best possible match is obtained between the steady-state temperatures predicted by a treatment model and a prespecified ideal temperature distribution. The observer uses a treatment model to control unmeasured locations. The first adaptive control scheme uses the optimizing routine alone, the second uses the observer alone and the third uses both the optimzing routine and observer. The performance of each of the adaptive control schemes is compared to a standard proportional-integral-derivative (PID) control scheme for one-dimensional simulations of typical treatments. Results comparing the deviation of the controlled temperature distribution to the ideal desired temperature distribution for all locations and all times indicate that the adaptive schemes perform better than the PID scheme. It can be concluded that adaptive control yields improved performance if good a priori knowledge of the treated region tissue and perfusion region boundaries is available. While these control schemes were designed for eventual implementation on a scanned focused ultrasound hyperthermia treatment system, the techniques are applicable to any system with the capability to vary specific power with respect to location and with an unknown distributed energy sink proportional to the temperature elevation.

APA, Harvard, Vancouver, ISO, and other styles

32

Schmid, Volker. "Design of a Two-Chamber-NO2-Fluorescence-Cell." PDXScholar, 1996. https://pdxscholar.library.pdx.edu/open_access_etds/5263.

Full text

Abstract:

Nitrogen oxides control the photochemical production of ozone 03 in the lower atmosphere and influence the concentration of the hydroxyl radical HO in the troposphere. As an important member of the nitrogen oxide family, N02 plays a significant role in serving as the only known source of ozone (through photolysis) in the lower atmosphere and as sink for HO via formation of nitric acid. Therefore, accurate measurements of nitrogen dioxide are essential for the understanding of the processes that determine the distribution of tropospheric ozone and for assessing the impact of human activity on the troposphere. Although reliable and sensitive techniques for the direct measurement of nitric oxide NO have been developed, these results could not be fully applied to direct N02 measurements. The purpose of the present study was to further develop a low pressure laser-excited fluorescence technique for measuring N02 by introducing the idea of a Two-Chamber-Fluorescence-Cell. Theoretical considerations of the performance of such a cell and the flow regime within the cell were done in order to assess the optimum cell design and the conditions for optimum operation. Measurements on a provided two-chambered test cell were done to verify the theoretical predictions made. This test cell has been explored with a Nd:Y AG pumped dye laser (100mW@564nm, 30Hz) and a supplied N02 concentration of lOOppm. The theoretical results suggest that the concept of a Two-Chamber-N02- Fluorescence-Cell yields an improved sensitivity compared to present direct techniques for measuring N02 In addition, experimental results give a better understanding of how to realize the initial idea of an operating Two-Chamber-N02- Fluorescence-Cell.

APA, Harvard, Vancouver, ISO, and other styles

33

Lam, Siu Tong. "Influence of insertion/donning instruction on frequency-specific sound attenuation achieved with ear canal caps and earmuffs with implications for industrial noise application." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/76037.

Full text

Abstract:

A study was conducted to determine the dependency of sound attenuation capabilities of earmuffs and earcaps on various application instruction techniques including: (1) no instruction, (2) no instruction with 70 dBA auditory feedback, (3) manufacturers' package instruction, (4) detailed instruction, and (5) modeled instruction. The hearing protection devices (HPDs) studied were: two earcaps (Willson #20 Sound-Ban, Flents #055 Peace & Quiet Headband), and four earmuffs (E-A-R model 1000, Siebe Norton Industrial model 4540, Peltor H6A/v, and Willson 365A Sound Barrier). HPD comfort and wearer preferences were also assessed. Furthermore, typical excessive industrial machinery noises were sampled and analyzed across the 1/3 octave frequencies. Finally, an example is provided as to how these machinery noise spectra can be matched with HPD attenuation spectra to ascertain the protector which would afford optimal protection for a given noise situation. Fifty subjects (twenty-five males and twenty-five females) participated in the experiment. Attenuation characteristics of the HPDs were evaluated utilizing the real-ear attenuation at threshold (REAT) method. A three-way mixed factorial design was used for data collection and analysis of attenuation results. Bipolar scales were used to assess individual HPD comfort, and the HPDs examined were ranked to obtain user preferences. In the analysis of attenuation results, analysis of variance CANOVA) and pairwise comparisons were utilized to detect statistical significance. The comfort scales and ranking scores were evaluated using the Friedman one-way block design. Attenuation results for the earmuffs and earcaps tested showed that they were much less susceptible than earplugs (from a previous study by Epps, 1984) to changes in user insertion/donning instruction technique and also not as dependent on user gender. The main effect of gender was not significant, and in general, any instruction was better than no instruction at all but the effects of those instructions did not differ significantly among each other. As expected, there were main effect differences among the HPDs as to their attenuation capabilities, rated discomfort, and user preference. Because the main objective was on assessing donning instruction effects on HPD attenuation, the comfort/preference assessment was based on only a short (25 minutes) wearing time during the attenuation tests. Therefore, the comfort/preference ratings could likely vary given longer wearing periods and different work environments. All results found are discussed on the basis of the sample data obtained and conclusions drawn from these results should be limited to these experimental conditions and subsequent analyses, as actual attenuation achieved in practice may differ. The example of HPD-machinery noise matching illustrates that the attenuation/spectral matching procedure may indeed be a feasible way of selecting optimal protection for workers.
Master of Science

APA, Harvard, Vancouver, ISO, and other styles

34

Madhavan, Thiruvenkatachari, and n/a. "Implementation of enterprise systems : a process view." University of Otago. Department of Accountancy and Business Law, 2008. http://adt.otago.ac.nz./public/adt-NZDU20080414.160905.

Full text

Abstract:

During the 1990s, many organizations across the globe migrated existing information systems to Enterprise Systems (ES) packages, which promised both business and technical solutions to their existing sets of problems. However, ES implementations have gained notoriety for not meeting budgeted expenditures and schedules. Such events have warranted academic research to gain an understanding about the role of ES packages and the importance of ES implementation. A large number of academic researchers have adopted a variance approach to examine ES implementation. As a result they have identified a range of critical success factors said to be influential in achieving successful implementation of ES packages. An alternate perspective for researching ES implementation is the process approach but this has remained largely neglected in academic debates. Furthermore, it has still not been possible for researchers or practitioners to understand the degree to which specific critical success factors, or other considerations, might be influential in any given ES implementation, either pre- or post-project. This research therefore adopts the process approach to examine ES implementations. The process approach is focused on explaining an outcome, given a set of activities. This research draws upon the work of Markus and Tanis (2000) and O�Leary (2000), who have established frameworks to explain an outcome (success or failure) of ES implementations. In addition, this research draws on the work of Davenport (2000) and Brehm et al. (2001), who have established models that outline activities related to configuration of business and software processes during implementation of ES packages. To enable this inquiry, a single case study (site) was chosen, to expose the actions and events that transpired during the implementation of an ES package. This research concludes that the framework of O�Leary (2000) is better suited to explain the outcome of an ES Implementation than the framework of Markus and Tanis (2000). The framework of Markus and Tanis (2000) was found to be useful in understanding the implementation process of an ES package. In addition, this research developed a novel model that portrays a comprehensive set of activities, undertaken by the case organization during the configuration of business and software processes. This model traversed the 'High-Level', 'Detailed Development' and 'Implementation' stages of the configuration process. It is asserted that this model is a significant improvement when compared to models presented by Davenport (2000) and Brehm et al. (2001). This research also explored some of the issues of the case study that did not fit neatly into the existing theoretic frameworks employed. Six issues emerged in this regard; 'Selection of industry specific ES package solution'; 'Selection of Proven Implementation Partner'; 'Project Planning and Management'; 'Incremental Implementation Strategy'; 'Ownership of the ES Project' and 'Selection of Best Practice Business Processes'. It is contended that each have played a critical role in the successful deployment of the ES package at this case site.

APA, Harvard, Vancouver, ISO, and other styles

35

Spyrou, Evangelos. "The effect of shell geometry on the impact attenuating capabilities of ice hockey helmets relative to liner structural characteristics and impact conditions." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ29578.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Richman, Jacinda. "Soil physical properties under the influence of different mechanical weeders." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0003/MQ44259.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Cracolici, Benedict. "Effect of Shear Rate and Mixing Time on Starch/Polyacrylamide Gels as Retention Aids." Fogler Library, University of Maine, 2004. http://www.library.umaine.edu/theses/pdf/CracoliciB2004.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Yuen, Pong-ming Dixon, and 阮邦明. "The Main Building of The University of Hong Kong: fire services installation guidelines for maintainingauthenticity." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B31474925.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Wang, Qingsu 1952. "Management of continuous system models in DEVS-SCHEME: Time windows for event-based control." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/291950.

Full text

Abstract:

This thesis describes the design and implementation of an extended knowledge-based modeling and simulation environment, in which the management of continuous-time models in DEVS-SCHEME is realized to meet the requirements of the modeling and simulation of a robot-managed laboratory aboard the forthcoming Space Station Freedom. The modular hierarchical modeling scheme is preserved in the continuous models by using DYMOLA, a continuous modeling language, as a bridge between the abstracted DEVS models and the continuous simulation language code (in DESIRE). Through operations on the System Entity Structure (SES), a knowledge representation scheme, models at different granularity levels are generated. Time-windows can be obtained by manipulating a pruned SES. These time windows can be used to generate an equivalent discrete-event model at a coarser granularity. Therefore, an event-based intelligent control strategy can be realized in this knowledge-based multi-facetted modeling environment. Continuous-time and discrete-event modeling and simulation can be merged with AI techniques.

APA, Harvard, Vancouver, ISO, and other styles

40

Joubert, Polly Ann. "Production of enteral feeds : manual vs mechanised vs 'ready to hang'." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53560.

Full text

Abstract:

Thesis (Mnutr)--Stellenbosch University, 2003.
ENGLISH ABSTRACT: INTRODUCTION Many patients seen by dietitians in Tygerberg Academic Hospital require feeding via the enteral route. Prior to this study all enteral feeds were mixed individually by hand, and production was time consuming and very labour intensive. The purpose of this study was, therefore, to compare the current method of production, with mechanised bulk production (MP) and "Ready to hang" (RTH) products, taking time, safety and cost effectiveness into consideration. MATERIALS AND METHODS A machine was designed and built to produce and decant bulk volumes of enteral feed. Production methods were evaluated and data was obtained regarding the time taken to produce a feed, and the true cost of the feeds produced. Microbiological samples were collected and the safety of all the three systems was determined and compared. RESULTS MP production time was significantly longer than hand production (HP), but MP decanting was significantly more accurate. RTH feeds cost 152% more than HP feeds, and MP feeds cost 95% of HP feeds. Seventy-one per cent of HP feeds, 74% of MP feeds and 34% of RTH feeds were contaminated just after administration had began. CONCLUSIONS Mechanisation is less labour intensive than HP and helps to decrease total costs. RTH feeds quickly become contaminated after administration decreasing their other advantages.
AFRIKAANSE OPSOMMING: IN L E ID IN G Baie van die pasiente wat deur dieetkundiges in Tygerberg hospitaal gesien word, benodig buisvoedings. Vo or hierdie studie geloots was, was alle buisvoedings by Tygerberg hospitaal met die hand gemaak. Hierdie metode is baie tydsaam en arbeidsintensief. Die doel van hierdie studie was, om die voorlopige sisteem van produksie te vergelyk met gemeganiseerde grootmaat produksie en "ready to hang" (RTH). Die studie het die volgende in ag geneenv produksietyd, mikrobiologiese veiligheid en koste effektieweteit. METODE 'n Masjien was ontwerp en gebou om grootmaat buisvoedings aan te maak en aftegiet. Produksie metodes was geevalueer en inligting bymekaar gemaak met betrekking tot produksietyd, en die ware koste van die voedings. Mikrobiologiese monsters was versamel en die mikrobiologiese veiligheid van al drie sisteme is bepaal en vergelyk. RESULTATE Produksie met die masjien was betekenisvol longer as die voedings wat met die hand gemaak was, maar die masjien het betekenisvol meer akkuraat afgemeet met afgiet. RTH voedings se koste beloop 152% meer as voedings wat met die hand gemaak word, en voedings wat deur die masjien gemaak word kos 95% van die wat met die hand gemaak is. Een en sewentig persent van die voedings wat met die hand gemaak was, 74% van die masjiengemaakte voedings en 34% van die RTH voedings was besmet net na toediening begin was. GEVOLGTREKKINGS Meganisasie is minder arbeidsintensief as voedings wat met die hand gemaak is en help om die kostes af te bring. RTH voedings word vinnig besmet met organismes na die begin van toediening en dit verminder hulle ander voordele.

APA, Harvard, Vancouver, ISO, and other styles

41

Wang, Zheng. "The design and implementation of a computer-controlled pneumatic device to replace the deadweight in standard exercise equipment." Thesis, Cape Peninsula University of Technology, 2007. http://hdl.handle.net/20.500.11838/1384.

Full text

Abstract:

Thesis (MTech (Information Technology))--Cape Peninsula University of Technology, 2007
The increasingly sedentary lifestyle of the past 30 years has contributed to declining health. Consequently, exercise is vital for good health maintenance. The global Health and Fitness Industry repeatedly indicates the need for optimally managed exercise with accurate information feedback. Compared to other industries, the fitness industry is lagging behind in incorporating Information Technology into its operations. On the other hand, the most current exercise equipment impose fixed-trajectory exercise on users with the dominance of static equipment designs. These exercise equipment are normally deadweight-based equipment. In deadweight-based exercise equipment, the weights generally can be changed only when the equipment is inactive. Therefore, a more novel exercise environment is required for current exercisers in the fitness industry. This thesis explores to develop a computer-controlled pneumatic dynamic resistance exercise equipment with onboard data management. This new technology optimises exercise effectiveness for users. Exercisers will have advanced diagnostic capacity, and will capture user data which can be manipulated into meaningful information for use by Health and Fitness Industry stakeholders. This thesis will explore all the key concepts about computer-controlled equipment. The key concepts to be investigated will include FX (force-displacement) control technology, pneumatic system control, fail-safe mechanics, and Graphical User Interface design. The primary aim of the project is to replicate and enhance the functionality, performance, and sensation of deadweight-based equipment. A further aim of the project is to investigate the feasibility of designing a compact retrofit-able pneumatic unit to replace the deadweights of existing standard exercise equipment. The computer control will be implemented on a "National Instruments PXI" computer featuring Data Acquisition and Control (DAQAC) capacity, and the software will be implemented using "LabVIEW 7.0', which is a graphic object-oriented computer language developed to facilitate hardware I software communications.

APA, Harvard, Vancouver, ISO, and other styles

42

Robe, Stephen C. "Comparison of a large and small grapple skidder in a pine plantation thinning application." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/45171.

Full text

Abstract:

The objective of this research was to compare the performance of a small (92 horsepower) grapple skidder with that of a large (185 horsepower) grapple skidder in corridor thinning applications in southern pine plantations. Comparisons included (1) time and production, (2) residual stand damage, (3) soil compaction, (4) cost, and (5) the impact of tree size on productivity. The large grapple skidder was found to be (1) more productive, (2) associated with slightly more residual stand damage, (3) associated with less soil compaction, (4) less expensive on a cost per ton of production basis, and (5) more sensitive to variation in tree size than was the small grapple skidder. The results of this research suggests that large grapple skidders are capable of excellent performance in corridor thinning of southern pine plantations.
Master of Science

APA, Harvard, Vancouver, ISO, and other styles

43

Cronkite, Patrick Joseph 1961. "Design methods for focusing grating coupler using holographic optical elements." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276863.

Full text

Abstract:

Light can be coupled out of a waveguide to a focused point by a focusing grating coupler and has possible applications in optical data storage. The grating can be fabricated with either e-beam techniques or holographic techniques. Two design methods are demonstrated that model the focusing grating coupler with holographic optical elements. Both methods take a geometrical optics approach to designing the holographic optical elements and both methods make use of commercially available ray trace programs. The first method uses complicated non-rotationally symmetric construction optics and requires either a modified ray trace program or special user defined surfaces. The second method involves a much simpler approach which did not require any changes to an existing ray trace program and requires only rotationally symmetric elements to correct the aberrations.

APA, Harvard, Vancouver, ISO, and other styles

44

Wilson, Paul, Roger Coupal, and William Hart. "An Economic Evaluation of Linear-Move Irrigation Technology." College of Agriculture, University of Arizona (Tucson, AZ), 1987. http://hdl.handle.net/10150/602128.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Winter, David. "The South African desalination equipment market : size, drivers and restraints." Thesis, Stellenbosch : Stellenbosch University, 2007. http://hdl.handle.net/10019.1/80649.

Full text

Abstract:

Thesis (MBA)--Stellenbosch University, 2007.
ENGLISH ABSTRACT: Desalination has been hailed by some as the answer to global freshwater supply shortages, but there is rigorous debate over the appropriateness of utilising desalination technology in regions that are not faced with severe water shortages. The aim of this research report is to provide a strategic overview of the South African desalination equipment market, a region where little research on this topic has been conducted. Secondary and thorough primary research in the form of interviews with desalination equipment suppliers and end users of desalination equipment in South Africa were conducted. The research findings revealed that the South African desalination equipment market, with a total annual revenue figure of R169.80 million in 2006 is very small when compared with the annual revenue figures of other global markets such as Saudi Arabia, which reached R6.61 billion in 2006. The industrial sector is the most active end user in South Africa followed by the commercial and lastly the municipal sector. It is anticipated however that the municipal sector, driven by coastal municipalities, will experience high growth in the medium to long term. Competition levels within the market were found to be high between desalination equipment suppliers, an attribute common in growth markets. Distinct market drivers, restraints and market trends were identified by research participants each of which have a varying influence on the desalination equipment market. South Africa has a fairly active desalination equipment market, which is small by global standards, and it is unlikely that desalination will solve South Africa’s water supply issues. Impoverished citizens, the high cost of desalination and the low cost of current fresh water sources all add to the complexity of the desalination debate in South Africa.
AFRIKAANSE OPOMMING: Ontsouting word deur sommige partye gesien as die antwoord op die wêreldwye vars water voorsieningstekorte, maar daar is breedvoerige debat oor die geskiktheid van ontsouting tegnologie in streke waar daar nie ernstige waterterkort is nie. Die doel van hierdie navorsingsverslag is om ’n strategies oorsig te lewer van die Suid Afrikaanse ontsoutingsmark, ’n streek waarin daar tot dusver min navorsing oor hierdie veld gedoen is. Sekondêre en primêre navorsing in die vorm van onderhoude met ontsoutings-toerusting en eindgebruikers van hierdie toerusting in Suid Afrika is gedoen. Die bevindinge toon dat die Suid Afrikaanse ontsoutings-toerusting mark, met ’n omset van R169.8 miljoen in 2006, baie klein is wanneer dit vergelyk word met ’n mark soos Saudi Arabië, met ’n omset van R6.6 miljard in 2006. Die industriële sektor is die mees aktiewe eidgebruiker in Suid Afrika, gevolg deur die kommersiële en laastens die munisipale sektor. Dit word egter geantisipeer dat die munisipale sektor, gedryf deur kus-munisipaliteite, die grootste groei in die medium tot lang termyn gaan toon. Dei bevindeninge wys verder op hoë vlakke van kompetisie tussen ontsoutings-toerusting voorsieners, ’n algemene verskynsel in groei-markte. Verskeie mark-drywers, beperkings en tendense is deur deelnemers in die navorsing geïdentifiseer, met elk wat ’n wisselende invlied op die ontsoutings-toerusting mark het. Suid Afrika het ’n redelike klein aktiewe ontsoutings-toerusting mark in wêreld-terme en dit is onwaarskynlik dat ontsouting Suid Afrika se water-probleme sal oplos. Arm inwoners, die hoë koste van ontsouting en die huidige lae koste van vars water dra alles by tot die kompleksiteit van die ontsoutingsdebat in Suid Afrika.

APA, Harvard, Vancouver, ISO, and other styles

46

Chan, Cheuk-ming Jonathan, and 陳卓明. "A study of the seller and buyer relationship strategy in the Hong Kongbroadcast video equipment industry." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1992. http://hub.hku.hk/bib/B31265170.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Ginjbaatar, Bilguun. "Creating an online shopping Website for "Chinguun-Tulga" office supply store /." Related Web site, 2007. http://www.chinguun-tulga.com/catalog/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Layden, Robert Greathouse. "A numerical analysis of the radar cross section of an arbitrary shaped over-moded re-entrant cavity." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/13749.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Huang, Yiteng (Arden). "Real-time acoustic source localization with passive microphone arrays." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/15024.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Hill, John Michael. "Simulation of a variable speed air conditioner as a multiple loop thermal system." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/16754.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Dissertations / Theses on the topic 'Microscopy – Equipment and supplies'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles