Getting Started with GIS: A LITA Guide     

Suzanne Duncan 《Journal of the Medical Library Association》2013,101(3):230-231

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New books     

J. Duncan Spaeth  Bertha Forbes Herring 《Quarterly Journal of Speech》2013,99(3):306-317

Adenoids and Tonsils. By Algernon Coolidge, M.D.: Harvard University Press, Cambridge, 1916. Cloth, price 50 cents.  相似文献   

ATTITUDES TOWARD EDUCATIONAL MEDIA: IMPLICATIONS FOR EDUCATIONAL GERONTOLOGY     

Marvin E. Duncan  Ronald K. Bass 《Educational gerontology》2013,39(1):77-91

This study was conducted to determine if there is or is not a difference in attitudes toward educational media between older adults and younger adults. Attitudinal information was gathered from the two groups utilizing an instrument entitled “Controversy in Academia” a 39‐item Likert‐type questionnaire. The questions from the instrument were divided into six groups, and six operational hypotheses were generated to effect testing. The results indicated that there were no basic differences between the attitudes toward educational media expressed by older adults and those expressed by younger adults.  相似文献   

Using decision support systems to facilitate the social process of knowledge management     

Gilberto?Montibeller  Duncan?ShawEmail author  Mark?Westcombe 《知识管理研究与实践》2006,4(2):125-137

The social processes involved in engaging small groups of 3–15 managers in their sharing, organising, acquiring, creating and using knowledge can be supported with software and facilitator assistance. This paper introduces three such systems that we have used as facilitators to support groups of managers in their social process of decision-making by managing knowledge during face-to-face meetings. The systems include Compendium, Group Explorer (with Decision Explorer) and V*I*S*A. We review these systems for group knowledge management where the aim is for better decision-making, and discuss the principles of deploying each in a group meeting.  相似文献   

The Structure of Achievement and Behavior across Middle Childhood     

Lori Kowaleski-Jones  & Greg J. Duncan 《Child development》1999,70(4):930-943

This research used data from the National Longitudinal Survey of Youth (NLSY) to describe and model developmental trajectories across middle childhood. Our sample consisted of approximately 1,000 children of NLSY women who were aged 6 to 7 years in either 1986 or 1988. Assessments of PIAT math and reading scores and the mother-reported Behavior Problem Index in 1986, 1988, 1990, and 1992 provided data for middle-child trajectories of children aged 6 to 7 in 1986. Assessments in 1988, 1990, 1992, and 1994 provided data for children aged 6 to 7 in 1988. We used the raw score form of these data to estimate LISREL-based models of their autoregressive structure. As with other samples, average math and reading achievement trajectories were parabolic for NLSY children, with scores increasing at a decreasing rate over this period. Average behavior-problem trajectories were flat. Behind these average shapes was extreme diversity in level (and in some cases, slopes), of individual trajectories and a pronounced tendency for above average changes between two adjacent assessments to be followed by opposite-signed changes in the subsequent period. Estimates from our structural models showed great heterogeneity in the average level of achievement and behavior for all three outcomes and heterogeneous slopes for reading scores as well. Boys but not girls were found to have heterogeneous slopes for math and behavior problems, whereas girls but not boys showed a significantly higher degree of persistence if "shocked" off of their expected trajectories.  相似文献   

Associations of object control motor skill proficiency,game play competence,physical activity and cardiorespiratory fitness among primary school children     

Andrew Miller  Narelle Eather  Mitch Duncan  David Revalds Lubans 《Journal of sports sciences》2019,37(2):173-179

This study investigated if object control relates to children’s game play competence, and examined these competencies as correlates of physical activity and cardiorespiratory fitness. Game play (Game Performance Assessment Instrument), object control (The Test Gross Motor Development-3), moderate-to-vigorous physical activity (Accelerometry), and cardiorespiratory fitness (20-metre shuttle) assessments were completed for 107 children (57% Female, 43% Male) aged 9–12 years (M 10.53, SD 0.65). Two-level regression of object control on game play competence, and object control and game play competence on physical activity and cardiorespiratory fitness assessed associations. Object control competence was positively associated with game play competence (Std. B = 0.25, t (104.77) = 2.38, p = 0.001). Game play competence (Std. B = 0.33, t (99.81) = 5.21, p < 0.000) was more strongly associated with moderate-to-vigorous physical activity than object control competence (Std. B = 0.20, t (106.93) = 2.96, p = 0.003). Likewise, game competence (Std. B = 0.39, t (104.41) = 4.36, p < 0.000) was more strongly associated with cardiorespiratory fitness than object control competence (Std. B = 0.22, t (106.69) = 2.63, p = 0.002). Object control and game competence are both important as correlates of physical activity and cardiorespiratory fitness in children.  相似文献   

AIDS: patient power puts research on trial     

Campbell D 《New scientist (1971)》1988,120(1638):26-27

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Adolescent physical activity levels: discrepancies with accelerometer data analysis     

Greig R.M. Logan  Scott Duncan  Nigel K. Harris  Erica A. Hinckson  Grant Schofield 《Journal of sports sciences》2016,34(21):2047-2053

This study investigated the effects of epoch length and cut point selection on adolescent physical activity intensity quantification using vertical axis and vector magnitude (VM) measurement with the ActiGraph GT3X+ accelerometer. Four hundred and nine adolescents (211 males; 198 females) aged 12–16 years of age wore accelerometers during waking hours. The GT3X+ acceleration counts were reintegrated into 1, 5, 15, 30 and 60 s epoch lengths for both vertical axis and VM counts. One cut point was applied to vertical axis counts and three different cut points were applied to VM counts for each epoch length. Significant differences (P < 0.01) in mean total counts per day were observed between vertical axis and VM counts, and between epoch lengths for VM only. Differences in physical activity levels were observed between vertical and VM cut points, and between epoch lengths across all activity intensities. Our findings illustrate the magnitude of differences in physical activity outcomes that occur between axis measurement, cut points and epoch length. The magnitude of difference across epoch length must be considered in the interpretation of accelerometer data and seen as a confounding variable when comparing physical activity levels between studies.  相似文献   

Effects of increasing and decreasing physiological arousal on anticipation timing performance during competition and practice     

Michael J. Duncan  Mike Smith  Elizabeth Bryant  Emma Eyre  Kathryn Cook  Joanne Hankey 《European Journal of Sport Science》2016,16(1):27-35

The aim of this study was to investigate if the effects of changes in physiological arousal on timing performance can be accurately predicted by the catastrophe model. Eighteen young adults (8 males, 10 females) volunteered to participate in the study following ethical approval. After familiarisation, coincidence anticipation was measured using the Bassin Anticipation Timer under four incremental exercise conditions: Increasing exercise intensity and low cognitive anxiety, increasing exercise intensity and high cognitive anxiety, decreasing exercise intensity and low cognitive anxiety and decreasing exercise intensity and high cognitive anxiety. Incremental exercise was performed on a treadmill at intensities of 30%, 50%, 70% and 90% heart rate reserve (HRR) respectively. Ratings of cognitive anxiety were taken at each intensity using the Mental Readiness Form 3 (MRF3) followed by performance of coincidence anticipation trials at speeds of 3 and 8 mph. Results indicated significant condition × intensity interactions for absolute error (AE; p = .0001) and MRF cognitive anxiety intensity scores (p = .05). Post hoc analysis indicated that there were no statistically significant differences in AE across exercise intensities in low–cognitive anxiety conditions. In high–cognitive anxiety conditions, timing performance AE was significantly poorer and cognitive anxiety higher at 90% HRR, compared to the other exercise intensities. There was no difference in timing responses at 90% HRR during competitive trials, irrespective of whether exercise intensity was increasing or decreasing. This study suggests that anticipation timing performance is negatively affected when physiological arousal and cognitive anxiety are high.  相似文献   

Using generational theory to rethink teaching in higher education     

Allison A. Buskirk-Cohen  Tisha A. Duncan  Margaret Levicoff 《Teaching in Higher Education》2016,21(1):25-36

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