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Numerical investigation of the effect of seasonal variations of depthof-closure on shoreline evolution

International Journal of Sediment Research 2021年第1期36卷 1-16页

作者： Xuan Tinh Nguyen Minh Thanh Tran Hitoshi Tanaka Trung Viet Nguyen yuta mitobe Cong Dien Duong Department of Civil Engineering Tohoku University

The current study presents the effects of seasonal variations in the depth-of-closure（D;） on shoreline evolution using a numerical,one-line shoreline *** erosion of the southern beach of the Nha Trang Coast,which is located in south central of Vietnam,is selected as the study *** study area is immensely influenced by the tropical monsoon climate that has a clear pattern of large waves in the northeast monsoon season and calm waves in the non-monsoon *** analysis of the long-term measured shoreline variations from a video-camera system has found a strong correlation of these variations to the monsoon-dominated wave characteristics in the Nha Trang ***,a new approach for determining the depth-of-closure with consideration of the seasonal wave climate changes is purposed in the current *** implementing this new approach into a numerical,one-line shoreline model,it is found that the seasonal variations of D;appear to better describe the periodical shoreline evolution due to the monsoon-dominated wave characteristics for the Nha Trang *** important findings are considered to commonly apply for monsoon-dominated coastal regions in *** findings are useful information not only for scientific readers but also for the coastal authorities and managers in order to make better countermeasure plans against this kind of erosion mechanism in the future.

关键词： Video camera Shoreline change One-line theory Nha Trang Beach Depth-of-closure Monsoon wave climate

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Effect of the Early Introduction of Mild Mobilization Performed by Nurses on the Recovery of Patients in the Intensive Care Unit

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Open Journal of Nursing 2016年第12期6卷 969-976页

作者： yuta mitobe Yu Koyama Hagiko Aoki Utako Shimizu Yoshiyuki Muramatsu Chikayo Koyama Sayuri Sakai Yuka Iwasa Jun Kikunaga Megumi Taguchi Masakazu Nitta Hiroshi Endoh Masaki Kitajima Shinichiro Morishita Niigata University of Health and Welfare Niigata Japan Department of Nursing Niigata University Graduate School of Health Sciences Niigata Japan Division of Emergency Critical Care Medicine Niigata University Graduate School of Medical Niigata Japan Institute for Human Movement and Medical Sciences Niigata University of Health and Welfare Niigata Japan

Rationale: Recent studies have reported the effectiveness of the early introduction of rehabilitation for preventing muscle weakness in patients in the intensive care unit (ICU). The early introduction of full-scale rehabilitation by a physical therapist is difficult in some cases because of disease severity and/or patient conditions. However, mild mobilization by a nurse (MMN), as a part of standard care performed, may have a positive effect on patient recovery. We examined the effect of the early introduction of MMN on the recovery of patients in the ICU. Methods: We retrospectively examined patients admitted to Niigata University Hospital’s ICU during between April 2014 and March 2015 who were receiving mechanical ventilation for 7 days or more. Patients were divided into two groups according to the date of initiation of MMN: group L comprised patients for whom MMN was started after 72 hours and group E comprised patients for whom MMN was started within 72 hours after ICU admission. The data were analyzed using the Fisher test, Mann-Whitney U test, and Wilcoxon test. Statistical significance was defined as P Results: Sixty-three patients were included: 42 patients in group L and 21 in group E. There was no significant difference between the two groups in patients’ background, including the type of illness, steroid use, presence of sepsis or diabetes, and sequential organ failure assessment (SOFA) score on ICU admission;however, the SOFA score at ICU discharge was significantly decreased in group E compared to that in group L (6.21 versus 4.30;P = 0.034). Conclusion: Our results indicate that MMN may reduce disease severity if started within 72 hours after ICU admission.

关键词： Intensive Care Unit (ICU) Nurse Mobilization Sequential Organ Failure Assessment (SOFA) Score

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