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Factors associated with student computer usage in higher educationMcMahon, Jill January 1997 (has links)
No description available.
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Learning equations using a computerised balance model : a Popperian approach to learning symbolic algebraAczel, James January 1998 (has links)
No description available.
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The use of laser-assisted hatching in bovine in vitro produced embryos to improve pregnancy rateMenges, Suzanne Lynn 15 May 2009 (has links)
In vitro produced (IVP) embryos not hatching from the zona pellucida (ZP) after transfer is one possible contributing factor of a lower pregnancy rate when compared to in vivo embryos. This study evaluates using a microscope objective mounted laser to cut the ZP prior to transfer into the recipient to assist hatching. The preliminary data evaluated the effect of laser treatment on IVP embryos and subsequent blastomere survival. In six replicates, bovine oocytes were in vitro produced according to the standard laboratory procedures of TransOva Genetics, Sioux Center, IA. On days 5, 6, and 7 of in vitro culture, embryos were randomly divided into 3 groups: no treatment (Control; n=63), sham ZP cut (Sham; n=68), or ZP cut (Cut; n=70). Control embryos were immediately returned to the incubator. Sham embryos were exposed to all conditions as Cut except laser assisted hatching. The XyClone® system was used to treat the Cut group using pulse strength of 90% and pulse length of 600 μsec. Embryos were returned to culture until day 8 when embryonic development and the percentage of live cells were determined and analyzed with Chi square. The number of developing embryos and the percentage of live cells per embryo showed no significant difference. Mean live cells ranged from 89-96% regardless of day of treatment. The laser assisted hatching effect on IVP embryo viability was evaluated by randomly dividing commercially produced embryos obtained from TransOva Genetics into two groups on day of transfer, Control or Cut. The ZP of treated embryos were cut with the laser using 80% pulse strength and pulse length of 500 μsec on day 7, immediately prior to transfer into estrous synchronized recipients. Ultrasonagraphy determined pregnancy rates. Thirty day pregnancy rates were 49.2% and 54.1% for Control (n= 189) and Cut (n=148) embryos, respectively, and were not statistically different (p > 0.05). However, 60 day Control pregnancy rate was 45.7% (n= 166) and the Cut group rate was 57.7% (n= 123) revealing a statistical difference (p < 0.05). These results demonstrate that the XyClone® system assisted hatching can improve 60 day pregnancy rates for IVP embryos by approximately 11 %.
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The use of laser-assisted hatching in bovine in vitro produced embryos to improve pregnancy rateMenges, Suzanne Lynn 15 May 2009 (has links)
In vitro produced (IVP) embryos not hatching from the zona pellucida (ZP) after transfer is one possible contributing factor of a lower pregnancy rate when compared to in vivo embryos. This study evaluates using a microscope objective mounted laser to cut the ZP prior to transfer into the recipient to assist hatching. The preliminary data evaluated the effect of laser treatment on IVP embryos and subsequent blastomere survival. In six replicates, bovine oocytes were in vitro produced according to the standard laboratory procedures of TransOva Genetics, Sioux Center, IA. On days 5, 6, and 7 of in vitro culture, embryos were randomly divided into 3 groups: no treatment (Control; n=63), sham ZP cut (Sham; n=68), or ZP cut (Cut; n=70). Control embryos were immediately returned to the incubator. Sham embryos were exposed to all conditions as Cut except laser assisted hatching. The XyClone® system was used to treat the Cut group using pulse strength of 90% and pulse length of 600 μsec. Embryos were returned to culture until day 8 when embryonic development and the percentage of live cells were determined and analyzed with Chi square. The number of developing embryos and the percentage of live cells per embryo showed no significant difference. Mean live cells ranged from 89-96% regardless of day of treatment. The laser assisted hatching effect on IVP embryo viability was evaluated by randomly dividing commercially produced embryos obtained from TransOva Genetics into two groups on day of transfer, Control or Cut. The ZP of treated embryos were cut with the laser using 80% pulse strength and pulse length of 500 μsec on day 7, immediately prior to transfer into estrous synchronized recipients. Ultrasonagraphy determined pregnancy rates. Thirty day pregnancy rates were 49.2% and 54.1% for Control (n= 189) and Cut (n=148) embryos, respectively, and were not statistically different (p > 0.05). However, 60 day Control pregnancy rate was 45.7% (n= 166) and the Cut group rate was 57.7% (n= 123) revealing a statistical difference (p < 0.05). These results demonstrate that the XyClone® system assisted hatching can improve 60 day pregnancy rates for IVP embryos by approximately 11 %.
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Proposed computer based training for the Minnesota Army National GuardSoplata, Rebecca D. January 2001 (has links) (PDF)
Thesis--PlanB (M.S.)--University of Wisconsin--Stout, 2001. / Includes bibliographical references.
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A survey of counselor trainee preferred learning style and its relationship to computer skills and technology useBerry-Harris, Traci Aaron. January 1900 (has links)
Thesis (M.S.)--West Virginia University, 2002. / Title from document title page. Document formatted into pages; contains v, 44 p. Vita. Includes abstract. Includes bibliographical references (p. 31-34).
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Comparing the effectiveness of three unique research based tutorials for introducing Newton's Second Law /Anderson, Mindi Kvaal, January 2009 (has links)
Thesis (M.S.) in Teaching--University of Maine, 2009. / Includes vita. Includes bibliographical references (leaves 57-62).
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The development of an interactive computer program to be used as a teaching aid in a college course covering A/B roll editingMondschein, Lauri A. January 2002 (has links)
Thesis (M.S.)--Kutztown University of Pennsylvania, 2002. / Source: Masters Abstracts International, Volume: 45-06, page: 2808. Typescript. Abstract precedes thesis as 2 preliminary leaves. Includes bibliographical references (leaves 45-47).
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An analysis of the use of the computer as a delivery system in the instructional processArendt, Sandra M. January 2000 (has links)
Thesis--PlanB (M.S.)--University of Wisconsin--Stout, 2000. / Includes bibliographical references.
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Navigational issues in hypertext-based learningAllinson, Lesley Joan January 1991 (has links)
No description available.
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