Organizational learning and documentation practices in pre-job briefings and post-job reviews

In this report we describe a case study in a nuclear power company regarding pre-job briefing and post-job review documentation practices and their relation to organizational learning. In the case study power company, pre-job briefings andpost-job reviews were documented as open feedback in a work permit system or as minutes of meetings. It was found that the documentation medium affects what is documented and whether the recorded information is used afterwards. We also found that the documentation can serve multiple functions. In addition to helping perform the same task again in the future, it can be utilized for various purposes by different stakeholders, including other work groups, training, supervision and oversight, and operating experience. Finally, a set of generic success factors to facilitate the generation and use of documentation from prejob briefings and post-job review were formulated.<br/

Emotions relating to romantic love-further disruptors of adolescent sleep

Objective: Early-stage romantic involvement may resemble hypomania in its manifestation on behavioral, physiological, and psychological levels. Previous research suggests that self-reported sleep duration may diminish as a result of falling in love during adolescence. We investigated how feelings of infatuation are related to subjective and objective measures of sleep duration, quality, and timing. Methods: 1374 adolescents (66% girls; mean age: 16.9, SD=0.6 years) selected from the population register responded to online questionnaires regarding romantic love, mental well-being, and sleep behavior. A sub-sample (n=309) underwent a week-long actigraphy measurement (GENEActiv Original). We compared the sleep duration, quality, and timing of those who reported being in the early stages of love to those who were not. Results: 11% of all participants reported being in the early stages of romantic love. Those girls and boys who were in love had higher scores of depression and anxiety than others. Girls who were in love reported poorer sleep quality, later sleep timing, and shorter sleep duration both on weekdays (mean difference: 32 minutes, p Conclusions: We conclude that romantic love is one further cause for short or poor quality sleep in girls and may relate to symptoms of depression and anxiety in both sexes. However, feelings of infatuation contain important developmental lessons. (C) 2020 National Sleep Foundation. Published by Elsevier Inc. All rights reserved.Peer reviewe

Assessment of time window for sleep onset on the basis of continuous wrist temperature measurement

The interactions of the principal circadian clock with the homeostatic sleep process create the time-sensitive window for easy falling asleep in the evening, which is affected by a thermoregulatory process. It has been hypothesized that the changes in skin and core body temperatures before the sleep onset might play a direct role in sleep regulation. To determine this time window, we recorded from 20 healthy participants (11 women and 9 men), aged 26-58 years, one overnight own-home ambulatory polysomnography and measured continuously wrist skin temperature with a wrist-worn accelerometer containing a skin temperature thermometer. Wrist skin temperatures which were read out from the thermometer of the accelerometers were modeled using linear mixed models, and the linear effect of time before the sleep onset on wrist temperature was analyzed using a mixed model with the sex and age as the covariates. We found that wrist skin temperatures increased on average by 0.6 degrees (of Celcius) in 10 min prior to the sleep onset and could be tracked robustly along a slope of time (p = 0.004). Our current findings may be useful in further characterizing the window of time and its boundaries for easy falling asleep.Peer reviewe

Preparación de loncheras nutritivas en madres de niños de 4 y 5 años de la Institución Educativa N° 1370-Tayapampa, San Miguel - Cajamarca 2017

El objetivo de la investigación fue describir el nivel de Conocimiento sobre preparación de loncheras nutritivas en madres de niños 3 y 4 años de edad la Institución Educativa N°1370 -Tayapampa, 2017-San Miguel-Cajamarca. La metodología que se utilizó en esta investigación es la investigación de diseño no experimental tipo descriptivo, transversal. La población y muestra estuvo conformada por 24 madres de la Institución Educativa Inicial N° 1370 Tayapampa- San Miguel - Cajamarca, 2017. La técnica utilizada fue la encuesta y el instrumento el cuestionario. Existe diferencia entre el nivel de conocimiento sobre preparación de loncheras nutritivas en madres con niños de niños de 4 y 5 años de la Institución Educativa N° 1370 Tayapampa- San Miguel - Cajamarca, 2017; en un 8.4% en la dimensión importancia de la lonchera escolar y un 5.6% en la dimensión importancia de los grupos de alimentos a favor de las madres de los niños de 5 años.Tesi

Data-driven modelling approach to circadian temperature rhythm profiles in free-living conditions

The individual variation in the circadian rhythms at the physiological level is not well understood. Albeit self-reported circadian preference profiles have been consolidated, their premises are grounded on human experience, not on physiology. We used data-driven, unsupervised time series modelling to characterize distinct profiles of the circadian rhythm measured from skin surface temperature in free-living conditions. We demonstrate the existence of three distinct clusters of individuals which differed in their circadian temperature profiles. The cluster with the highest temperature amplitude and the lowest midline estimating statistic of rhythm, or rhythm-adjusted mean, had the most regular and early-timed sleep-wake rhythm, and was the least probable for those with a concurrent delayed sleep phase, or eveningness chronotype. While the clusters associated with the observed sleep and circadian preference patterns, the entirely unsupervised modelling of physiological data provides a novel basis for modelling and understanding the human circadian functions in free-living conditions.Peer reviewe

Laboratory evaluation of particle-size selectivity of optical low-cost particulate matter sensors

Low-cost particulate matter (PM) sensors have been under investigation as it has been hypothesized that the use of low-cost and easy-to-use sensors could allow cost-efficient extension of the currently sparse measurement coverage. While the majority of the existing literature highlights that low-cost sensors can indeed be a valuable addition to the list of commonly used measurement tools, it often reiterates that the risk of sensor misuse is still high and that the data obtained from the sensors are only representative of the specific site and its ambient conditions. This implies that there are underlying reasons for inaccuracies in sensor measurements that have yet to be characterized. The objective of this study is to investigate the particle-size selectivity of low-cost sensors. Evaluated sensors were Plantower PMS5003, Nova SDS011, Sensirion SPS30, Sharp GP2Y1010AU0F, Shinyei PPD42NS, and Omron B5W-LD0101. The investigation of size selectivity was carried out in the laboratory using a novel reference aerosol generation system capable of steadily producing monodisperse particles of different sizes (from similar to 0.55 to 8.4 mu m) on-line. The results of the study show that none of the low-cost sensors adhered to the detection ranges declared by the manufacturers; moreover, cursory comparison to a mid-cost aerosol size spectrometer (Grimm 1.108, 2020) indicates that the sensors can only achieve independent responses for one or two size bins, whereas the spectrometer can sufficiently characterize particles with 15 different size bins. These observations provide insight into and evidence of the notion that particle-size selectivity has an essential role in the analysis of the sources of errors in sensors.Peer reviewe