72 research outputs found
The relationship between insomnia symptoms and work productivity among blue-collar and white-collar Japanese workers engaged in construction/civil engineering work: a cross-sectional study
No full textBackground: The situation of work productivity loss due to sleep disorders/problems among workers in industrialized societies remains unclear. The purpose of this study was to clarify the prevalence of insomnia symptoms and actual situation of work productivity by job type (white-collars/blue-collars) among construction/civil engineering workers in Japan and evaluate the association between insomnia symptoms and work productivity adjusting for sleep duration and sociodemographic, work-related, and health-related variables.
Methods: This cross-sectional study included 17,828 construction/civil engineering workers (15,837 males and 1991 females) aged 40 to 74 years in Japan. The questionnaire consisted of socio-demographic characteristics, information on work productivity (work performance and absence), respective insomnia symptoms (difficulty initiating sleep; DIS, difficulty maintaining sleep; DMS, and early morning awakening; EMA), bedtime schedule, workrelated factors (job type, working hours), and perceived health condition. To identify the associated factors of work productivity, the logistic regression analyses were conducted.
Results: The percentages of workers who reported to be experiencing DIS, DMS, and EMA were 7.9, 16.3, and 13.1%, respectively. Poor work performance was associated with every insomnia symptom in both the blue-collar and white-collar workers. Meanwhile, absence was associated with DIS in blue-collar workers and both DIS and DMS in white-collar workers; however, not with EMA in both the groups. In blue-collar workers, engagement in shift work was associated with poor work performance.
Conclusions: The present study revealed the association between insomnia symptoms and work productivity, suggesting the necessity of early prevention of insomnia among both blue-collar and white-collar workers
On the existence of infinitely many universal tree-based networks
No full textAbstractA tree-based network on a set X of n leaves is said to be universal if any rooted binary phylogenetic tree on X can be its base tree. Francis and Steel showed that there is a universal tree-based network on X in the case of n = 3, and asked whether such a network exists in general. We settle this problem by proving that there are infinitely many universal tree-based networks for any n>1
Gastvrijheid in het Albert Schweitzer ziekenhuis
No full textHet ASz bestaat uit ziekenhuizen in Sliedrecht, Zwijndrecht en Dordrecht. Bij het ASz mogen de patiënten de juiste zorg op het juiste moment en de juiste plaats met de juiste middelen door de juiste persoon met het juiste resultaat verwachten. Maar wat is juist? Als het gaat om (medisch inhoudelijke) kwaliteitseisen en normen, dan vertrouwen patiënten erop dat het ASz daaraan voldoet. Deze aspecten zijn door de patiënt echter moeilijk inhoudelijk te beoordelen. Het verblijf en de bejegening, de gastvrijheidsaspecten, zijn door de patiënt wel te beoordelen. De vraag wat de patiënt op gastvrijheidsniveau verwacht tijdens het verblijf in het ziekenhuis is aanleiding geweest voor nader onderzoek door Momoko Visions Trends Concepts, TU Delft, de Hogeschool Rotterdam en de Haagse Hogeschool.Real Estate and Housin
Change of cooling appliance usage of elderlies: Before and after the Fukushima nuclear power plant accident
No full textEvaluation of Sleep Quality in a Disaster Evacuee Environment
No full textWe aimed to evaluate sleep and sleep-related physiological parameters (heart rate variability and glucose dynamics) among evacuees by experimentally recreating the sleep environment of evacuation shelters and cars. Nine healthy young male subjects participated in this study. Two interventions, modeling the sleep environments of evacuation shelters (evacuation shelter trial) and car seats (car trial), were compared with sleep at home (control trial). Physiological data were measured using portable two-channel electroencephalogram and electrooculogram monitoring systems, wearable heart rate sensors, and flash glucose monitors. Wake after sleep onset (WASO) and stage shift were greater in both intervention trials than the control trial, while rapid-eye movement (REM) latency and non-rapid eye movement (NREM) 1 were longer and REM duration was shorter in the evacuation shelter trial than the control trial. Glucose dynamics and power at low frequency (LF.p) of heart rate variability were higher in the car trial than in the control trial. It was confirmed that sleep environment was important to maintain sleep, and affected glucose dynamics and heart rate variability in the experimental situation
Deferrence in dietary fatty acid composition changes energy metabolism, biological rhythm and sleep.
No full textPreference for biological motion in domestic chicks: sex-dependent effect of early visual experience
No full textTo examine the effects of early visual experience on preference for biological motion (BM), newly hatched chicks were exposed to a point-light animation (a visual stimulus composed of identical light points) depicting the following features of a hen: a walking hen (a BM stimulus), a rotating hen (a non-BM stimulus), a pendulum stimulus, a random motion stimulus and a stationary pattern. Chicks were then tested in a binary choice task, choosing between walking-hen and rotating-hen stimuli. Males exhibited a preference for BM if they had been trained with any animation except the stationary pattern stimulus, suggesting that the BM preference was not learned, but induced by motion stimuli. We found a significant positive correlation between the number of approaches in training and the preference in the test, but locomotion alone did not cause preference for BM. In contrast, females exhibited a particularly strong preference for walking-hen stimuli, but only when they had been trained with it. Furthermore, females (but not males) trained with random motion showed a preference for walking hen over walking cat (a biological motion animation depicting a cat), possibly suggesting that females are choosier than males. Chicks trained with a stationary pattern and untrained controls did not show a significant preference. The induction of BM preference is discussed in terms of possible ecological background of the sex differences
The Percussion Music of Toshi Ichiyanagi: A Performance Guide of Select Works from 1984-2002
No full textabstract: This document examines select percussion works of Toshi Ichiyanagi (b. 1933), in order to create a resource that brings exposure and sparks interest in his percussion music. Ichiyanagi has long been one of Japan’s leading composers. However, despite having a successful career since the 1960s, he is not well-known in the United States. Furthermore, his close associations with celebrated American avant-garde composers and performers like John Cage, David Tudor, and La Monte Young, make Ichiyanagi’s virtual obscurity in the United States even more striking. Particularly, for a field birthed in the avant-garde, it is surprising that many of his percussion compositions avoid mainstream recognition.
For the study, the author prepared and performed a recital of the five works that are discussed: Wind Trace (1984), Trio Interlink (1990), Rhythm Gradation (1993), Perspectives II (1996), and Ballade (2002). The document is a performance guide that also provides background information on each piece. The guide discusses technical and interpretative issues uncovered through firsthand preparation and performance, and provides suggestions to solve them. At the conclusion, the author draws connections between these pieces, to highlight similarities that will be helpful to consider when preparing performances of any of his works involving percussion. Finally, an exhaustive catalog of known Ichiyanagi percussion works is provided as a resource for further performance and research.
Ichiyanagi has been writing for percussion since the 1970s. His catalog includes solos, chamber pieces, ensemble pieces, mixed-chamber pieces, and concerti. With recent compositions like Marimba Scenery (2011), Concerto for marimba and orchestra (2012), and the duo Two Dimensions (2012), Ichiyanagi continues to write for percussion. Virtuosi such as Sumire Yoshihara, Atsushi Sugahara, Momoko Kamiya, and Mutsuko Taneya have commissioned and premiered works by the composer. These pieces are on par with the challenging repertoire that has dominated percussion literature since the mid-twentieth century. Nonetheless, the author has found no existing document that is fully devoted to Ichiyanagi’s percussion work.Dissertation/ThesisDoctoral Dissertation Music 201
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