75 research outputs found
Short communication: The effect of a one-hour Eastern stress management session on salivary cortisol
No full textThe Eastern stress management techniques derived from the Body-Mind-Spirit (BMS) model by Chan (2001) have been applied to interventions for a variety of clienteles and the effectiveness has been supported by positive psychological outcomes. This study aims to complement these studies by evaluating the efficacy of a one-hour Eastern stress management session in reducing salivary cortisol levels in working adults in Hong Kong. Pre- and post-test salivary cortisol levels were measured and a significant drop after the session when compared with local normative data was evident. The efficacy of the stress management session, limitations of this study suggestions for further research are discussed. Copyright © 2006 John Wiley & Sons, Ltd.link_to_subscribed_fulltex
Comparison of tumour susceptibility among various organs of foetal, young and adult ICR/Jcl mice
No full textSummary.-Urethane was found to be uniformly distributed in all the major organs of foetal, young and adult ICR/Jcl mice and then to disappear rapidly as measured by the incorporation of urethane-carbonyl-14C, thus permitting the accurate com-parison of tumour susceptibility of cells in various organs of mice at different ages. Lung tumour frequency (tumours/lung) was significantly higher in mice treated with urethane when young (21 days old) and adult (63 days old) than in those treated in utero (Days 11-19 of gestation). When relative sensitivity of a lung cell was cal-culated as the ratio of average number of tumours per lung per mg of lung at the time of treatment, however, a lung cell of the foetus was more sensitive to urethane than that of the young and adult. Hepatomata were Induced significantly only when male foetuses and neonates were exposed to urethane. The offspring exposed to urethane on Days 11-16, however, developed hepatomata in lower incidence than those exposed on Days 14-19, whereas the previous investigation by the author revealed that Days 11-13 correspond to the stage most sensitive to hepatocarcino-genesis. This contradiction was due to the occurrence of testicular hypogenesis(chemical castration) in all offspring of the former group. Differentiating femal
Effects of Shoe Top Visual Patterns on Shoe Wearers’ Width Perception and Dynamic Stability
No full textVisual illusions caused by varied orientations of visual patterns may influence the perception of space and size, possibly affecting body stability during locomotion. This study examined the effect of variations in shoe top visual patterns on perception and biomechanical stability while walking and running. Twenty healthy adults performed five walking and running trials along an instrumented walkway when wearing shoes with five different striped patterns (plain, vertical, outward, horizontal, and inward). Before these locomotion trials, participants ranked their perceptions of shoe width. We used synchronized force platform and motion capturing systems to measure ground reaction force, mediolateral center of position displacement, ankle inversion and eversion, ankle excursion, and maximum eversion velocity. We rated stability perception on a 150-mm visual analog scale immediately after each shoe condition. Data analyses indicated that participants perceived plain and horizontal striped shoes as significantly wider than inward and vertical patterned shoes. During walking, participants wearing shoes with plain and horizontal striped patterns demonstrated smaller mediolateral center of position displacement, maximum eversion velocity, and ankle range of motion when compared with walking when wearing outward and vertical striped patterns; when running, we observed a similar effect for maximum eversion velocity. Thus, certain visual patterns on the tops of shoes influence the wearers’ width perception and locomotion in ways that affect ankle stability during walking and running, with implications for risk of injury. © The Author(s) 2018.link_to_subscribed_fulltex
Interactivity, active collaborative learning, and learning performance : the moderating role of perceived fun by using personal response systems
No full text202207 bchyAccepted ManuscriptOthersThe Hong Kong Polytechnic UniversityPublishedGreen (AAM
Regulation of testis specific protein Y-encoded like 2, a member of nucleosome assembly proteins, in neonatal heart development
No full textCommentary: Patient Perspectives on Artificial Intelligence; What have We Learned and How Should We Move Forward?
No full text\ua9 2023, The Author(s). Artificial intelligence (AI) in healthcare has now begun to make its contributions to real-world patient care with varying degrees of both public and clinical acceptability around it. The heavy investment from governments, industry and academia needed to reach this point has helped to surface different perspectives on AI. As clinical AI applications become a reality, however, there is an increasing need to harness and integrate patient perspectives, which address the distinct needs of different populations, healthcare systems and clinical problems more closely. Despite this need, patient perspectives on AI implementation have little presence in academic literature and within implementation science and are not sufficiently considered throughout the MedTech and eHealthtech product development cycle, which brings its own challenges and opportunities. This joint patient expert/clinician commentary aims to briefly summarise views on AI. It reflects upon recommendations on how stakeholders such as clinicians and Health & MedTech small and medium-sized enterprises (SMEs) can make practical usage of these views. The recommendations of the authors centre around how to work better with patients to enable both product centric and patient centric innovation and person-centred care
A New Model of Quantum Dot Light Emitting-Absorbing Devices
No full textMotivated by the Jaynes–Cummings (JC) model, we consider here a quantum dot coupled simultaneously to a reservoir of photons and two electric leads (free-fermion reservoirs). This new Jaynes–Cummings-leads (JCL)-type model makes it possible that the fermion current through the dot creates a photon flux, which describes a light-emitting device. The same model also describes a transformation of the photon flux into the current of fermions, i.e., a quantum dot light-absorbing device. The key tool to obtain these results is the abstract Landauer–Büttiker formula.Мотивируемые моделью Джейнса-Каммингса (ДК), рассматриваем квантовую точку, соединенную одновременно с резервуаром фотонов и двумя электродами (нефермионными резервуарами). Новая модель Джейнса-Каммингса для электродов (ДКЭ) позволяет фермионному току, проходящему через точку, создавать поток фотонов, что является характеристикой светоизлучающего устройства. Та же самая модель используется для описания трансформации потока фотонов в ток фермионов, т.е. квантово-точечного светопоглощающего устройства. Ключевым средством для получения результатов стала абстрактная формула Ландауэра-Буттикера.The first two authors would like to thank the University of Aalborg and the Centre de Physique Th´eorique–Luminy for hospitality and financial support. The third author is thankful to WIAS-Berlin for the support of his several visits allowed to accomplish this project. We are thankful to the referee for the suggestion of a possible physical interpretation of our model and for remarks served for revision of the initial submission. We thank Horia D. Cornean for discussions of the JCL-model
Lidar probing the urban nocturnal boundary layer
No full textLidar observations to study the nocturnal boundary layer in the atmosphere were made on selected evenings during December 1997 - March 1998 at the City University of Hong Kong (lat. 20°20′6 inches, long. 114°10′18 inches, at 57 m AMSL), Hong Kong. The ground-based Nd:YAG lidar has been operated to detect the vertical distribution of aerosols in the NBL at a subtropical urban site. It is shown that the vertical relative signal profiles can be employed to determine the heights of the single or multiple nocturnal inversions. In a clear sky and light wind evening transition period, the strong radiative cooling caused the air near the ground becomes stably stratified. The nocturnal inversion starts to emerge soon before sunset and grows vertically as the night progresses. The study also showed that the temporal evolution of the nocturnal inversion depth was rapidly increased soon after sunset and a slower rate in the midnight hours. The results of the study indicate that the vertical aerosol distribution in the multiple-layer is more complicated than that in the single-layer, of NBL. The early morning transition of the NBL is also discussed. A comparison of the lidar aerosol signals and radiosonde measurements was performed to evaluate the consistency of observations between the different systems.link_to_subscribed_fulltex
A New Model of Quantum Dot Light Emitting-Absorbing Devices
No full textMotivated by the Jaynes–Cummings (JC) model, we consider here a quantum dot coupled simultaneously to a reservoir of photons and two electric leads (free-fermion reservoirs). This new Jaynes–Cummings-leads (JCL)-type model makes it possible that the fermion current through the dot creates a photon flux, which describes a light-emitting device. The same model also describes a transformation of the photon flux into the current of fermions, i.e., a quantum dot light-absorbing device. The key tool to obtain these results is the abstract Landauer–Büttiker formula.Мотивируемые моделью Джейнса-Каммингса (ДК), рассматриваем квантовую точку, соединенную одновременно с резервуаром фотонов и двумя электродами (нефермионными резервуарами). Новая модель Джейнса-Каммингса для электродов (ДКЭ) позволяет фермионному току, проходящему через точку, создавать поток фотонов, что является характеристикой светоизлучающего устройства. Та же самая модель используется для описания трансформации потока фотонов в ток фермионов, т.е. квантово-точечного светопоглощающего устройства. Ключевым средством для получения результатов стала абстрактная формула Ландауэра-Буттикера.The first two authors would like to thank the University of Aalborg and the Centre de Physique Th´eorique–Luminy for hospitality and financial support. The third author is thankful to WIAS-Berlin for the support of his several visits allowed to accomplish this project. We are thankful to the referee for the suggestion of a possible physical interpretation of our model and for remarks served for revision of the initial submission. We thank Horia D. Cornean for discussions of the JCL-model
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