• Journal of the Ergonomics Society of Korea
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• v.26 no.2
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• pp.45-59
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• 2007

The operating tasks of overhead crane have caused undue stress to the operators from physical, mental, and environmental workload. Existing workload assessment models for musculoskeletal disorders such as OWAS, RULA, and QEC have limited applicability to the crane operating tasks because they focus mainly on physical factors and do not consider the relative importance of each factor. The present study was to develop a workload assessment model customized to overhead crane operation, following a systematic process: (1) analyzing task characteristics, (2) selecting workload factors, (3) developing assessment methods, (4) establishing action levels, and (5) computerizing the assessment model. Based on literature review, worksite survey, and focus group interview, 4 physical factors (awkward posture, static posture, repetitive motion, and excessive force), 6 mental factors (visual demand, auditory demand, task complexity and difficulty, time urgency, work schedule related stress, and safety related stress), and 4 environmental factors (noise, vibration, dust, and temperature) were selected and their rating scales and relative weights were determined. Then, based on the workload assessment results of 8 overhead cranes operated at different workplaces, the action levels of each factor category were established. Finally, the crane operation assessment model was computerized for effective analysis and report preparation. The present approach is applicable to develop a customized workload assessment model for an operating task under consideration.

• Women's Health Nursing
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• v.19 no.4
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• pp.295-305
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• 2013

Purpose: The objective of this study was to identify the relationships among symptom bother, physical and mental stress and health-related quality of life (HRQoL) in women with overactive bladder (OAB) syndrome. Methods: The participants were 106 women who were diagnosed with OAB (urgency, urge urinary incontinence, frequency, and/or nocturia) at P university hospital. Data were collected from Dec 23, 2011 to Aug 31, 2012. Results: The mean score for symptom bother was 43.1 points, for physical stress, 12.8 which was slightly higher than mental stress (11.8), and for HRQoL, 63.9. For symptom type, there were statistically significant differences in the symptom bother (F=8.67, p<.001) and HRQL (F=3.32, p=.023). The Symptom bother of OAB was positively correlated with physical stress (r=.23, p=.014) and mental stress (r=.33, p<.001) and negatively correlated with the subscales of HRQoL; coping (r=-.66, p<.001), concern (r=-.71, p<.001), sleep (r=-.59, p<.001), and social interaction (r=-.58, p<.001). Conclusion: From the results, bother symptom was associated with physical, mental stress and HRQoL. These results suggest that nursing intervention programs for OAB should be developed not only to relieve the symptoms but also to reduce stress and improve the quality of life.

• Journal of Sasang Constitutional Medicine
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• v.30 no.3
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• pp.24-39
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• 2018

Introduction The purpose of this study was to systematically review previous studies on Sasang type-specific pathophysiological symptoms in urination and defecation. Methods Peer-reviewed articles on type-specific pathophysiological symptoms of urination and defecation published until September 2016 were extracted from domestic and international six databases. Clinical characteristics from thirteen extracted articles were categorized into three urination domains of appearance of urine, capacity of bladder and urinary discomfort, and three defecation domains of irritability of bowel movement, functional constipation and discomfort from irregularity. Results As for the urination, Tae-Eum type showed dark color with foam, however So-Eum type had frequent urination and sensitivity to dysuria but no nocturia and residual urine sense. As for the defecation, So-Yang type showed frequent urgency and constipation, however So-Eum type reported loose stool. So-Yang type showed varied level of health status depending on defecation irregularity. There were disparities with rectal tenesmus among Sasang types. Discussion Six domains of urination and defecation related type-specific pathophysiological clinical symptoms were provided in this study. This study would contribute to the standardized clinical measures of Sasang typology in the near future.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.10 no.6
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• pp.98-107
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• 2011

In this paper, we propose the location determination system of an agent mobile device using the information provided by the WLAN(Wireless LAN) infrastructure. This system is configured as a typical ESS(Extended Service Set)-type WLAN structure with real-time location positioning engine and thru AP(Access Point) controller. The positioning engine collects the information of agent devices using SNMP(Small Network Management Protocol) thru AP controller and utilize those information as Cell ID. for LBS(Location Based Service). In the result of a real office environment implementation, the average success rate of inter-AP roaming is measured to 62.5% and the duration time of the device information update within the AP is average of 11 second of time, which means this system is adaptable to the location based service of above average accuracy but somewhat less urgency.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.1 no.2
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• pp.159-168
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• 1997

This paper presents a mechanism which supplies tasks with fast turn-around time on real-time multimedia environments. Tasks are classified into periodic and aperiodic tasks according to their executing period, and the types of them are classified into three groups : critical tasks, essential tasks and common tasks by the degree of its urgency. In the case of periodic tasks, we defer the execution of it within the extent to keep the deadline as long as possible and serve the aperiodic tasks, and provide aperiodic tasks with fast turn-around time. Changing the priority of each task is allowed within the same type and it is scheduled by using the dynamic priority. The emergency tasks are executed within deadline in any circumstances, and the least laxity one is served first when many real-time tasks are waiting for execution. The result of simulation shows that the proposed mechanism is better than the EDZL, known as suboptimal in multiprocessor systems, in the point of rum-around time.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.4
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• pp.670-675
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• 2018

There is a growing interest in EH-WSN (energy-harvesting wireless sensor networks) that can solve power problems in wireless sensor networks. In EH-WSN, on-off duty cycling is being studied in order to balance energy harvesting and consumption. However, the urgency of the sensed data and the energy harvesting rate in the environmental monitoring EH-WSN are important factors to determine the network performance. Therefore, it is necessary to control the duty-cycle period according to the importance of the sensed data and the energy harvesting rate in addition to simply maintaining the balance of the power. In this paper, we analyze the problem of on-off duty cycling in EH-WSN for environmental monitoring and propose an adaptive duty-cycle scheduling scheme considering the priority of sensed data and energy harvesting rate, where the priority of sensed data determined by sensed value and changing rate. The performance of scheduling scheme was analyzed by computer simulations.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.5 no.4
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• pp.692-698
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• 2001

The radio communications by SSB and VHF transceivers are still used very efficiently in coast stations and military base stations. The communication system by the conventional SSB and VHF transceivers between a coast station and a terminal is an one-to-one system. In this dissertation, however, the conventional one-to-one system is expanded to one-to-multiple systems. Then, frequencies can be used effectively for distress, urgency, safety traffic, and military communications. An ICS has been proposed and added, in this dissertation, to the conventional SSB and VHF communication systems, which can realize one-to- several terminal communications. The line switching system by the ICS is to be remote-controlled by ASK modulated PTT signals and audio signals. An ICS can change a connection between terminal and transceiver through a circuit switching system at any time. For this purpose, the author has researched and developed a ASK transmission system, ICS system, control algorithm, multiprocessor system, and moni-toring system. As a conclusion, the developed line switching control systems and equipments can be used effectively for maritime communication, military communication, fishery communication, etc.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.2
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• pp.672-677
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• 2014

The purpose of this study is to analyze the advertising regulations for juvenile protection, find their problems and suggest the alternatives for their improvements. All media products harmful to juveniles including advertising are regulated by the Juvenile Protection Act. The regulations related with advertising for juvenile protection of the Special Act on Safety Control of Children's Dietary Life, the Broadcasting Advertising Review Regulations and the National Health Improvement Act were analyzed. The results were: 1)the weaknesses of the implementation of the regulations with lack a little consistency and a lack of objectivity; 2)the necessity of the newly established articles with the times; and 3) the urgency of the establishment of alcohol advertising regulations. In conclusion, it has been suggested that the integrated advertising regulations or guidelines by the unitary review board should be implemented.

• Journal of Chest Surgery
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• v.19 no.1
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• pp.50-57
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• 1986

Sixty-nine patients with various types of cyanotic congenital heart disease underwent systemic-pulmonary artery shunts with a microporous polytetrafluoroethylene [PTFE] prosthesis between 1979 and 1985. Their ages ranged from 2 months to 39 years [mean$\pm$SD: 5.2$\pm$7.4, median: 3.3 years]. Diagnosis included the following: Tetralogy of Fallot, 45: Double outlet right or left ventricle, 11: Single ventricle, .5: Transposition of great vessels, 4: Tricuspid atresia, 3 and Pulmonary atresia with intact ventricular septum, 1. Forty-eight patients had subclavian-pulmonary artery anastomosis, 12 patients aorta-right pulmonary artery anastomosis, 6 patients aorta-main pulmonary artery anastomosis, and 3 patients descending aorta-pulmonary artery anastomosis. The PTEE graft of 3 mm in diameter was used in 1, 4 mm in 29, 5 mm in 35 and 6 mm in 4 patients. Ten patients were died within 30 days after operation [mortality rate: 14.5%]. Among them, 6 patients were operated in urgency due to cardiac arrest or severe anoxic spell after cardiac catheterization, and so surgical mortality of elective operation is 9.5%. The 59 survivors showed improvement of the arterial oxygen saturation [65.4% - 9.8%] and hemoglobin [18.8 gm/dl - 16.0 gm/dl] values [V<0.01]. The follow up period ranged from 1 month to 67 months, [752 patient-months] and during this periods there were 4 late shunt failures after 3 months postoperatively with 4 mm graft, and 2 with 5 mm graft. The over-all patency rate of 4 mm PTFE was 85.9$\pm$9.2% [SEM] in 12 months and 40.9$\pm$22.5% in 24 months. The over-all patency rate of 5 mm PTFE was 87.5$\pm$9.6% in 12 months and 58.3$\pm$24.6% in 36 months. The lowest systolic pressure in death group was 64.9$\pm$15.0 mmHg and in survival group, 86.4$\pm$12.1 mmHg [P<0.001]. We think that the PTFE graft is useful in palliative shunt operation, but the effectiveness of the 4 mm PTFE graft may be limited. The blood pressure also may play an important role in patency of Prosthesis.

• The Journal of the Korea Contents Association
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• v.19 no.10
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• pp.325-340
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• 2019

The purpose of this paper is to develop and suggest an integrative leadership contingency framework of leadership that will state the situational and psychological factors under which leadership effect should be maximized. Our leadership model presents that situational factors, including development, circumstances urgency and task structure, proposes which of transformational, transactional, empowering, and authentic leadership solutions. Also, our integrative leadership contingency model in turn results in a combination of the level of follower commitment, intrinsic motivation, and individual creativity based on inductive research method. This integrative leadership model suggested here has significant contributions for leadership effectiveness and future leadership research agenda. Next leadership research could experimentally examine the structural relationships between each of the leadership styles and levels of contingency and psychological factors of followers.