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Automatic step-size adaptation in incremental supervised learningMahmood, Ashique Unknown Date
No description available.
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Micronets and frustrated fractalsHetherington, Cecil R. January 1998 (has links)
No description available.
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Automatic step-size adaptation in incremental supervised learningMahmood, Ashique 11 1900 (has links)
Performance and stability of many iterative algorithms such as stochastic gradient descent largely depend on a fixed and scalar step-size parameter. Use of a fixed and scalar step-size value may lead to limited performance in many problems. We study several existing step-size adaptation algorithms in nonstationary, supervised learning problems using simulated and real-world data. We discover that effectiveness of the existing step-size adaptation algorithms requires tuning of a meta parameter across problems. We introduce a new algorithm - Autostep - by combining several new techniques with an existing algorithm, and demonstrate that it can effectively adapt a vector step-size parameter on all of our training and test problems without tuning its meta parameter across them. Autostep is the first step-size adaptation algorithm that can be used in widely different problems with the same setting of all of its parameters.
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Age dependent differences in attenuation of vertical ground reaction force during a step descentSaywell, Nicola Lesley January 2009 (has links)
Aim: The aim of this study was to investigate the differences between older and younger adults in the attenuation of impact during descent from a step. Strategies that have been implicated in reducing either the magnitude of vertical ground reaction force (vertical GRF) or the time taken to reach the maximum vertical GRF in the stepping leg were explored. Study Design: The study was an experimental, laboratory based, repeated measures design. Participants: Twenty participants took part in this exploratory study. Ten in the older group of 60-80 years, mean 65.3 (SD 5) years and ten in the younger age group of 20-30 years, mean 22.8 (SD 2.5) years. Main Measures: The vertical GRF and the time taken to reach maximum vertical GRF were measured to ascertain impact during step descent. Electromyography and kinematic variables were measured to determine the effect they may have on the impact. The variables measured were the maximum joint range of motion of the hip and knee during early stance in step descent. Surface electromyography from four lower limb muscles was recorded to ascertain the magnitude of muscle activity at impact. The relationship in an antero-posterior direction of the upper body and stepping leg at initial contact (IC) was also investigated. Results: There was a significant difference in both the amount of knee flexion and the amount of activity of the vastus lateralis muscle during impact between older and younger adults. Older adults had significantly less knee flexion during a step descent activity than younger adults (F(1,18)=5.48; p=.031).Older adults had significantly more vastus lateralis activity during a step descent activity than younger adults (F(1,18)=5.21; p=.035). Conclusions: Older and younger adults use different strategies in both muscle activation and joint range of motion around the knee of the leading leg during the step descent. Older adults used more vastus lateralis activity perhaps to increase stiffness in the knee, leading to a reduction in range of motion at impact. Although no change in vertical GRF was detected in this study, both of these strategies have the potential to increase the impact of a step and therefore cause jarring and possible damage. This study recruited healthy active older adults and differences in impact may be observed in an older or less active population, or in those with joint pathology such as osteoarthritis.
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Age dependent differences in attenuation of vertical ground reaction force during a step descentSaywell, Nicola Lesley January 2009 (has links)
Aim: The aim of this study was to investigate the differences between older and younger adults in the attenuation of impact during descent from a step. Strategies that have been implicated in reducing either the magnitude of vertical ground reaction force (vertical GRF) or the time taken to reach the maximum vertical GRF in the stepping leg were explored. Study Design: The study was an experimental, laboratory based, repeated measures design. Participants: Twenty participants took part in this exploratory study. Ten in the older group of 60-80 years, mean 65.3 (SD 5) years and ten in the younger age group of 20-30 years, mean 22.8 (SD 2.5) years. Main Measures: The vertical GRF and the time taken to reach maximum vertical GRF were measured to ascertain impact during step descent. Electromyography and kinematic variables were measured to determine the effect they may have on the impact. The variables measured were the maximum joint range of motion of the hip and knee during early stance in step descent. Surface electromyography from four lower limb muscles was recorded to ascertain the magnitude of muscle activity at impact. The relationship in an antero-posterior direction of the upper body and stepping leg at initial contact (IC) was also investigated. Results: There was a significant difference in both the amount of knee flexion and the amount of activity of the vastus lateralis muscle during impact between older and younger adults. Older adults had significantly less knee flexion during a step descent activity than younger adults (F(1,18)=5.48; p=.031).Older adults had significantly more vastus lateralis activity during a step descent activity than younger adults (F(1,18)=5.21; p=.035). Conclusions: Older and younger adults use different strategies in both muscle activation and joint range of motion around the knee of the leading leg during the step descent. Older adults used more vastus lateralis activity perhaps to increase stiffness in the knee, leading to a reduction in range of motion at impact. Although no change in vertical GRF was detected in this study, both of these strategies have the potential to increase the impact of a step and therefore cause jarring and possible damage. This study recruited healthy active older adults and differences in impact may be observed in an older or less active population, or in those with joint pathology such as osteoarthritis.
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God as we understood God a program which can help Roman Catholics who are in twelve step recovery to find a healthy God representation /Kriso, Kevin J. January 1999 (has links)
Thesis (D. Min.)--Boston University, 1999. / Abstract. Includes bibliographical references (leaves 171-180).
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A study of Christian spirituality and its linkage to the length of sobriety among members of the twelve-step recovery groupsShin, George Young. January 2005 (has links)
Thesis (D. Min.)--Northern Baptist Theological Seminary, Lombard, Ill., 1997. / This is an electronic reproduction of TREN, #077-0014. Includes bibliographical references (leaves 89-94).
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The 12 steps of recovery and the Orthodox scriptural traditionBarrett, David. January 1998 (has links)
Thesis (M. Div.)--St. Vladimir's Orthodox Theological Seminary, 1998. / Includes bibliographical references (leaves 83-85).
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A study of Christian spirituality and its linkage to the length of sobriety among members of the twelve-step recovery groupsShin, George Young. January 1997 (has links)
Thesis (D. Min.)--Northern Baptist Theological Seminary, Lombard, Ill., 1997. / Includes bibliographical references (leaves 89-94).
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Do adolescents affiliate with 12-step groups? : a multivariate process model of effects /Kelly, John Francis. January 2001 (has links)
Thesis (Ph. D.)--University of California, San Diego and San Diego State University, 2001. / Vita. Includes bibliographical references (leaves 87-96).
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