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Working Conditions and Fatigue in Japanese Shift Work Nurses: A Cross-sectional Survey
Kida Ryohei,Takemura Yukie 한국간호과학회 2022 Asian Nursing Research Vol.16 No.2
Purpose This study aimed to identify the working conditions (working hours, overtime work, number of night shifts, number of holidays, and work intervals) associated with fatigue, based on the shift patterns, and determine their thresholds. Methods From January to February 2020, a web-based questionnaire was sent to 4601 shift work nurses at 47 hospitals in Japan. The multivariate logistic analysis was conducted to predict high- and low-fatigue groups by working conditions, and receiver operating characteristic analysis was performed to clarify the high-fatigue thresholds by shift pattern. Results A total of 386 shift work nurses participated in this study. The threshold (fatigue was 3.0 or higher) of the two-shift rotation was 9 hours 50 minutes for daily working hours during day shifts (Odds ratio [OR] = 1.57, p < .01), 17 hours 15 minutes for daily working hours during night shifts (OR = 1.20, p < .01), and 8.0 days for the number of night shifts (OR = 1.09, p = .02). The threshold of the three-shift rotation was 9 hours 45 minutes (OR = 1.59, p < .01), 2.9 days for the number of midnight shifts (OR = 1.53, p < .01), and 2.0 times for the interval between day-shift and night-shifts within 12 hours (OR = 1.39, p < .01). Conclusion Working hours and the number of night shifts are important for two-shift rotation, and working hours for the assignment of midnight shift are important for three-shift rotations. Nurse managers should manage shifts according to nurses’ shift patterns.
A Functional Role for CREB as a Positive Regulator of Memory Formation and LTP
Satoshi Kida 한국뇌신경과학회 2012 Experimental Neurobiology Vol.21 No.4
cAMP response element-binding protein (CREB), a transcription factor, has been shown to play a central role in memory formation, and its involvement in this process has been investigated using a wide range of animal models, from nematodes to higher animals. Various CREB mutant mice have been developed and investigated. Several types of mutant mice with loss of CREB function have impaired memory formation and long-term potentiation (LTP), suggesting that CREB plays essential roles in these processes. To characterize the roles of CREB in memory formation and LTP further, mutant mice displaying gain of CREB function have been generated and analyzed. Importantly, CREB-DIEDML mice and CREB-Y134F mice showed enhanced memory formation, whereas CREB-VP16 mice displayed a lowered threshold of long-lasting LTP (L-LTP) induction, strongly suggesting that CREB functions as a positive regulator of memory formation and LTP. In this review, I focus on the effects of the genetic activation of CREB in LTP and memory formation and summarize previous findings.
Takanori Kida,Masayuki Hagiwara,Yoshikazu Mizuguchi,Yoshihiko Takano 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
We have investigated the angular dependence of the upper critical fields (µ0Hc2) of a single crystalof Fe1+(Te,Se) in pulsed high magnetic fields up to 52 T. At T = 10 K, the µ0Hc2 increases withincreasing , which is the angle between the c-axis and the direction of the applied magnetic field. Using the effective-mass model based on the three-dimensional anisotropic Ginzburg-Landau (G-L)theory, we estimate the effective-mass anisotropy ratio= (mc /mab)1/2 to be 1.6 at 10 K. Thisresult is consistent with that of our previous study on the anisotropy coefficient of the resistiveupper critical field,
문헌 및 위성영상에 기초한 북한의 산지토사재해 발생경향 및 복구사례 분석
김기대 ( Kidae Kim ),강민정 ( Minjeng Kang ),김석우 ( Suk Woo Kim ) 한국산림과학회 2021 한국산림과학회지 Vol.110 No.3
이 연구는 1960년부터 2019년까지 북한에서 발생한 산지토사재해의 시공간적 발생경향과 일부 발생 및 복구 사례를 분석하기 위하여 실시하였다. 북한의 산지토사재해 발생이력은 1995년(김정일 집권시기)부터 대외적으로 보고되기 시작하였고, 여름철 호우가 주된 유발요인으로 나타났다. 산림황폐율은 인구밀도와 밀접한 관련성(R<sup>2</sup> = 0.4347, p = 0.02)을 보이며, 산림황폐율이 높은 서해안에서 산지토사재해 발생 보고건수가 많은 것으로 나타났다. 이는 인위적 산림훼손이 산림황폐화의 주된 원인이며, 나아가 산지토사재해 발생에도 현저한 영향을 끼쳤음을 시사한다. 위성영상을 통해 표층붕괴, 토석류 및 땅밀림 발생이 확인되었으며, 이러한 산지토사재해는 일반산지뿐만 아니라 다락밭, 채석장, 임도, 산불피해지 등 산림훼손지에서도 발생한 것으로 나타났다. 대부분의 피해지역은 복구사업의 시행 없이 존치되었지만, 일부 지역에서 산복녹화공 등의 산지사방사업 또는 사방댐, 유도둑 등의 야계사방사업을 시행한 것으로 확인되었다. 이 연구의 결과는 향후 산림복구 및 사방사업 분야의 남북 교류협력 확대에 필요한 기초정보를 제공할 수 있을 것으로 기대된다. This study investigated spatiotemporal trends of sediment-related disasters in North Korea from 1960 to 2019 and post-disaster recovery cases based on a literature review and satellite images. Results showed that occurrence status of sediment-related disasters was initially externally reported in 1995 (during the Kim Jongil era); their main triggering factor was heavy summer rainfall. Furthermore, forest degradation rate was positively correlated with population density (R<sup>2</sup> = 0.4347, p = 0.02) and occurrence number of sediment-related disasters was relatively high on the west coast region, where both variables showed high values. This indicates that human activity was a major cause of forest degradation and thus, significantly affected sediment-related disasters in mountain regions. Finally, sediment- related disasters due to shallow landslides, debris flow, and slow-moving landslides were observed in undisturbed forest regions and human-impacted forest regions, including terraced fields, opencast mines, forest roads, and post-wildfire areas, via satellite image analysis. These disaster-hit areas remained mostly abandoned without any recovery works, whereas hillside erosion control work (e.g., treeplanting with terracing) or torrent erosion control work (e.g., check dam, debris flow guide bank) were implemented in certain areas. These findings can provide reference information to expand inter-Korean exchange and cooperation in forest rehabilitation and erosion control works of North Korea.