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951.
Kristine M. Alpi James C. Brown Jr. Jennifer A. Neel Carol B. Grindem Keith E. Linder James B. Harper 《Journal of the Medical Library Association》2016,104(1):15-23
Objective
Clinical and research usefulness of articles can depend on image quality. This study addressed whether scans of figures in black and white (B&W), grayscale, or color, or portable document format (PDF) to tagged image file format (TIFF) conversions as provided by interlibrary loan or document delivery were viewed as acceptable or useful by radiologists or pathologists.Methods
Residency coordinators selected eighteen figures from studies from radiology, clinical pathology, and anatomic pathology journals. With original PDF controls, each figure was prepared in three or four experimental conditions: PDF conversion to TIFF, and scans from print in B&W, grayscale, and color. Twelve independent observers indicated whether they could identify the features and whether the image quality was acceptable. They also ranked all the experimental conditions of each figure in terms of usefulness.Results
Of 982 assessments of 87 anatomic pathology, 83 clinical pathology, and 77 radiology images, 471 (48%) were unidentifiable. Unidentifiability of originals (4%) and conversions (10%) was low. For scans, unidentifiability ranged from 53% for color, to 74% for grayscale, to 97% for B&W. Of 987 responses about acceptability (n=405), 41% were said to be unacceptable, 97% of B&W, 66% of grayscale, 41% of color, and 1% of conversions. Hypothesized order (original, conversion, color, grayscale, B&W) matched 67% of rankings (n=215).Conclusions
PDF to TIFF conversion provided acceptable content. Color images are rarely useful in grayscale (12%) or B&W (less than 1%). Acceptability of grayscale scans of noncolor originals was 52%. Digital originals are needed for most images. Print images in color or grayscale should be scanned using those modalities. 相似文献952.
953.
This study examined the effect of autonomous motivational priming on motivation, attitudes and intentions towards high-intensity interval training (HIT). Participants (N = 42) performed a graded exercise test to determine their peak aerobic power (WPEAK). At a subsequent testing session, participants were randomised to complete either an autonomous or neutral motivational priming task followed by a 10 × 1 HIT exercise protocol, alternating 1-min bouts of hard (70% WPEAK) and light (12.5% WPEAK) exercises for 20 min. Participants primed with autonomous motivation reported greater enjoyment, P = .009, ηp2 = .16, and perceived competence, P = .005, ηp2 = .18, post-exercise compared to those in the neutral priming condition. Participants in the autonomous motivational priming condition also reported more positive attitudes, P = .014, ηp2 = .14, towards HIT; however, there was no difference between the conditions for task motivation during HIT or intentions, P = .53, ηp2 = .01, to engage in HIT. These findings highlight autonomous motivational priming as a method of enhancing affective and motivational experiences regarding HIT. 相似文献
954.
Load carriage (LC) exercise in physically demanding occupations is typically characterised by periods of low-intensity steady-state exercise and short duration, high-intensity exercise while carrying an external mass in a backpack; this form of exercise is also known as LC exercise. This induces inspiratory muscle fatigue and reduces whole-body performance. Accordingly we investigated the effect of inspiratory muscle training (IMT, 50% maximal inspiratory muscle pressure (PImax) twice daily for six week) upon running time-trial performance with thoracic LC. Nineteen healthy males formed a pressure threshold IMT (n?=?10) or placebo control group (PLA; n?=?9) and performed 60?min LC exercise (6.5?km?h–1) followed by a 2.4?km running time trial (LCTT) either side of a double-blind six week intervention. Prior to the intervention, PImax was reduced relative to baseline, post-LC and post-LCTT in both groups (pooled data: 13?±?7% and 16?±?8%, respectively, p?.05) and similar changes were observed post-PLA. Post-IMT only, resting PImax increased +31% (p?.05) and relative to pre-IMT was greater post-LC (+19%) and post-LCTT (+18%, p?.05), however, the relative reduction in PImax at each time point was unchanged (13?±?11% and 17?±?9%, respectively, p?>?.05). In IMT only, heart rate and perceptual responses were reduced post-LC (p?.05). Time-trial performance was unchanged post-PLA and improved 8?±?4% after IMT (p?.05). In summary, when wearing a 25?kg backpack, IMT attenuated the cardiovascular and perceptual responses to steady-state exercise and improved high-intensity time-trial performance which we attribute in part to reduced relative work intensity of the inspiratory muscles due to improved inspiratory muscle strength. These findings have real-world implications for occupational contexts. 相似文献
955.
Alan K. Goodboy Matthew M. Martin Elizabeth Brown 《Journal of Applied Communication Research》2016,44(4):434-452
Bullying is a serious communication problem facing teachers, administrators, parents, and students alike. Although much research has examined bullying intervention and prevention efforts in schools, bullying on the bus has received little empirical attention, even though victimization regularly occurs in this school-related environment. The purpose of this study was to examine how bus drivers are affected by student bullying during their routes. Participants included 117 public school bus drivers who reported on victimization from students during their bus route and resulting driver outcomes. Results of path analyses revealed significant mediation models; the bullying of bus drivers had effects on driver outcomes (i.e. anxious driving, occupational self-efficacy, emotional exhaustion, and cynicism) indirectly through its effects on job stress. Moreover, results of conditional process analyses revealed that these mediated effects were moderated by years of bus driving experience (i.e. moderated mediation); the indirect effects on driver outcomes were stronger for more experienced drivers. 相似文献
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959.
This research tested the hypothesis that in hyperactive and normal children a cognitive modelling treatment procedure would produce improved scores on the Matching Familiar Figures Test (MFF), a primary index of impulsivity. The hypothesis was based on earlier findings that modelling was found to be a successful treatment procedure for eliminating other behaviour disorders. The hypothesis was verified in that the cognitive modelling procedure reduced the number of errors on the MFF. Based on the present research, it was recommended that future studies evaluate the efficacy of modelling techniques to problem solving tasks utilized in the school setting. 相似文献
960.
Klaus‐E. Jaritz 《Environmental Education Research》1996,2(1):51-62
This paper consists of two parts, the first one sets out the place of the case studies in the context of environmental education in German colleges and universities [1]. The case studies reported here should initiate inter‐university discussions on the objectives of, and the ways to incorporate, environmental education into the training for the pedagogical professions at German academic institutions. The second part tries to deduce generalisable aspects from the studies carried out in order to make some provisional conclusions about environmental education in pre‐service teacher education and the necessary research work in this field. Here use is made of the EEITE characteristics which Country Project Representatives agreed during their Summer Conference in 1993 as criteria to analyse the outcomes of the case studies [2]. 相似文献