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The parallel spectral-domain optical coherence tomography(PSDOCT) is described for high-speed optical coherence tomography(OCT) without lateral scanning. In this setup, the self-elimination of auto-correlation(AC) interference algorithm was used for eradicating the AC interference and ghost images. However, when performed in free space OCT, this algorithm still generated a weak DC component. The algorithm was improved by adding the background intensity part to compensate for the mutual interference between object and reference arms. The results demonstrate that the DC component can be eradicated. Compared with conventional OCT and complex Fourier-domain optical coherence tomography, the advantages of PSDOCT with the improved algorithm in free space are that it has no moving parts to generate consecutive phase shift, the structure of the object can be reconstructed immediately and automatically, and the speed is approximately 16 times faster than those of the other two in the same case. 相似文献
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Taishi Tsuji Satoru Kanamori Masashige Saito Ryota Watanabe Yasuhiro Miyaguni Katsunori Kondo 《Journal of sports sciences》2020,38(4):422-429
ABSTRACTOlder people who engage in sports and exercise in a group render greater benefits for socio-psychological aspects compared to exercising alone. The aim of this study was to identify the prevalence of specific types of sports and exercise groups and the association with self-rated health, depressive symptoms, and frequency of laughter among community-dwelling older people. We used cross-sectional data from the 2016 Japan Gerontological Evaluation Study and analysed 63,465 males and 68,497 females aged ≥65 years. The top three most popular types among males were golf (11.3%), walking (8.4%), and ground golf (6.3%). Among females, the top three were fitness exercises (13.8%), walking (8.3%), and weight exercises (6.2%). After adjusting for potential confounders, engaging in golf with a group was significantly related with excellent self-rated health (prevalence ratio, PR, 1.31 in male and 1.78 in female), low depressive symptoms (PR, 0.70 and 0.71), and a high frequency of laughter (PR, 1.12 and 1.13). Among females, walking displayed a significant relationship with all three characteristics (PR, 1.23, 0.79, and 1.06, respectively). Golf in older males and walking in older females might be the first choice for an effective programme to spread sports and exercise groups within the older Japanese community. 相似文献
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Justin B. Leaf Aditt Alcalay Jeremy A. Leaf Kathleen Tsuji Alyne Kassardjian Stephanie Dale John McEachin Mitchell Taubman Ronald Leaf 《Journal of Research in Special Educational Needs》2016,16(4):217-225
Prompting systems are guidelines of when to provide learners with prompts and when to fade prompts. Today, there are several prompting systems implemented to teach receptive labeling to individuals diagnosed with autism spectrum disorders and other disabilities. This study compared most‐to‐least prompting to an error correction procedure involving feedback and remedial trials for teaching two children with autism a variety of receptive labels. All teaching was implemented in a one‐to‐one instructional setting. Researchers taught each participant how to receptively identify 18 pictures; nine were taught using error correction and nine were taught using most‐to‐least. The researchers utilized an adapted alternating treatment design nested into a multiple probe design to evaluate the two procedures. Results indicated that participants were able to reach mastery criterion on 100% of skills taught using the error correction and were able to reach mastery criterion on 88.9% of skills taught using most‐to‐least. Additionally, error correction tended to require fewer trials for participants to reach mastery criterion. 相似文献
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Justin B. Leaf Jeremy A. Leaf Aditt Alcalay Alyne Kassardjian Kathleen Tsuji Stephanie Dale 《Exceptionality》2016,24(2):109-122
This study compared most-to-least prompting to flexible prompt fading for teaching four children with an autism spectrum disorder various expressive tasks. Using a parallel treatment design nested into a multiple probe design, researchers taught each participant how to expressively label six pictures with most-to-least prompting and six pictures with flexible prompt fading. The researchers evaluated effectiveness, maintenance, efficiency, and performance across both prompting conditions and across all participants. Results indicated that both prompting procedures were effective across all four participants. Results also indicated that flexible prompt fading led to a higher percentage of independent correct responding during teaching trials. For three of the participants, flexible prompt fading was also a more efficient procedure. Results were mixed in terms of maintenance across the four participants. 相似文献
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Daisuke Abe Hirokazu Doi Taishi Asai Mayuko Kimura Tadashi Wada Yuusuke Takahashi 《Journal of sports sciences》2018,36(4):393-397
Recent studies have shown the contribution of genetic determinants to athletes’ physical ability. However, despite the fact that cognitive abilities like self-control and stress-tolerance influence athletes’ competitive performance, few studies to date have investigated the association between genetic polymorphism, which is linked to cognitive ability and athletic performance. The present study investigated the link between single-nucleotide polymorphisms (SNPs), which are known to exert influences on dopaminergic neural function and competitive performance of swimmers. The results have revealed superior competitive performance in competitive swimmers with Met allele of catechol-O-methyltransferase Val158Met polymorphism than those with Val/Val genotype. The investigated SNPs of DRD2 and DRD3 were not associated with swimmer’s competitive performance. This finding indicates that genetic polymorphism linked to cognitive ability influences the athletes’ performance. 相似文献
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