• Journal of the Korean Society of Physical Medicine
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• v.9 no.1
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• pp.115-123
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• 2014

PURPOSE: This study was to investigate of pain and spine shape in elementary school students. The aim of this study was to prevent pain and spinal misalignment is to provide basic data and the need for regular screening for elementary school students. METHODS: This study had a survey research about pain and spine shape by using questionnaires and Formetric 4D. Subjects were 301 Elementary School Students RESULTS: In the presence or absence of pain and the presence of pain was in a high proportion and many of them indicated the back as a pain area, As a result of the spine shape contour, pelvic tilt was normal and trunk inclination was asymmetric as well as thoracic kyphosis and lumbar lordosis were diminished. There was a significant difference in relationship of trunk inclination according to pain CONCLUSION: The asymmetric of trunk inclination influenced the pain, In contrast, the pain did not influence thoracic kyphosis and lumbar lordosis in diminished. but, the diminution in thoracic kyphosis and lumbar lordosis are potential sources of pain. Regular checkups are necessary to prevent elementary school students from a change of spine shape and a pain, Moreover, education of maintaining normal posture should be followed.

• Journal of the Ergonomics Society of Korea
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• v.30 no.4
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• pp.503-507
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• 2011

Objective: This paper presents the factors influencing the effectiveness of materials handling equipments in agriculture. Background: Agriculture is one of the job categories where work-related musculoskeletal disorders(MSDs) are the most common. Statistics shows that majority of farm workers is exposed to repetitive and forceful body movements, lifting, lowering, pushing, pulling, or carrying heavy materials. In such a working environment, materials handling equipments are required and introduced to assist in the prevention of MSDs and other farm injuries. Method: Examples of materials handling equipments are rail carts, portable lifts, and bale handlers. Contributing factors influencing the effectiveness of materials handling equipments supplied in agriculture were identified based on the lessons learned from previous government-funded ergonomic projects. Results: Contributing factors identified include: (1) forward-looking attitude for the standardization of farming, its environments, and handling equipments, (2) participation of farm members in the process and evaluation of project, (3) leadership of project manager, (4) reinforcement of safety education and training, and (5) project selection and priority of handling equipment. Conclusion: Government-funded research planners, farmers, ergonomists, and farm machine experts are recommended to consider the factors identified when implementing materials handling equipments in agriculture. Application: Actual or potential application of this research includes recommendation for the effective implementation of material materials handling equipments in agricultural sectors.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.34 no.1
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• pp.1-8
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• 2011

Controlling industrial vehicle operated by human in warehouse was not simple since the information transfer for controlling the vehicle was not easy. However, as the technology for the WMS (Warehouse Management System) has been advanced and the PDA (Personal Digital Assistant) has come into wide use in a workplace, the control of man-operated vehicle became less difficult as do to AGVS (Automated Guided Vehicle System). This study examines the ways to improve the efficiency of warehouse operation through introducing rule of task assignment for the vehicles, particularly forklift. This study, basically, refer to AGV operation policy because a great number of studies for AGV dispatching rule have been done and the mechanism for the controlling vehicles is very similar. The workers in field prefer to simple dispatching rules such as Shortest Retrieval Time First (SRTF), Shortest Travel Time First (STTF), and Longest Waiting Time First (LWTF). However, these rules have potential disadvantage. Thus, several rules made up by combining rules mentioned above are introduced and these new rules use threshold value or evaluation formula. The effectiveness of these new rules are tested by simulation and the results are compared. This study proposes favorable dispatching rules for forklift in warehouse for the efficiency of the vehicle operation and stability of service level.

• Journal of the Korean Institute of Educational Facilities
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• v.14 no.2
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• pp.16-24
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• 2007

The study is intended to analyze the tendency of the remodeling for the high schools in Seoul, with the potential challenges thereof, determining the principle for the remodeling projects in the days to come. To that end, the analysis to identify the school facilities in a bid to accommodate the current curriculum was conducted, along with the case study on remodeling projects. The $7^{th}$ curriculum demands for a significant change in school facilities. The number of student in a class that has been on the decline, despite of steady increase in number of schools, and the population getting concentrated in Seoul and its suburbs have resulted in an increase in number of class. Consequently, more investment in the facility, rather than improving a substantial education environment, has been made. The study, thus, is aimed at identifying the facility of the high school required by the $7^{th}$ curriculum, as well as implementing a fact-finding investigation into the remodeling works far high schools in Seoul so as to come up with the guideline for remodeling projects.

• Journal of the Korean earth science society
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• v.34 no.6
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• pp.456-469
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• 2013

This study is performed to find out the eruptive events of the historical period recorded in literature, which have been recognized and regarded as ones from Mt. Baekdusan, and to make volcanological interpretations of the eruptive events. Since the Millennium eruption, more than 31 eruptive events have been discovered, most of which are Plinian eruptions with volcanic ash that dispersed into the regions in the vicinity of the volcano. The 1903 record includes the event of the phreatomagmatic or vulcanian eruption that occurred within the Cheonji caldera lake. Based on the eruption records of the historical period and the 2002 precursor unrest to volcanic eruptions, Mt. Baekdusan has been evaluated and regarded as an active volcano that has the potential to erupt in the future.

• Journal of Korean Medical classics
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• v.29 no.1
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• pp.125-137
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• 2016

Objectives : Introduction to Medicine(醫學入門, Yixuerumen) is one of the basic clinical texts in Korean medical history. This study is designed to prove clinical value of Introduction to Medicine for practitioners in their early stage of clinical practice. Methods : Introduction to Medicine is closely reviewed in various aspects in order to examine broad outlines of specificity as well as its distinctive constructional feature. Results : Since Introduction to Medicine showed peculiar intention of developing practitioner's clinical ability, it has been a preferential choice for Korean medicine practitioners to enhance their qualification at the early stage of one's career in Korean history. It is still valid for modern practitioners because composite medical texts are needed in order to systematize one's fragmental knowledge acquired from institutional education. Conclusions : Introduction to Medicine shows a large potential as a clinical textbook in the course of maximizing one's clinical ability with its aid. Through understanding multilateral aspects of clinical guidelines and directions engraved in Introduction to Medicine, learners will be able to derive full capacity from the text.

• Journal of the Korean Society of Safety
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• v.28 no.5
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• pp.27-34
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• 2013

Almost accidents in construction sites are occurred by unsafe work conditions and failure making safe environment. As recent construction projects become more complex, various and diversified, So the potential of construction-related accidents is increased as well. Comparing the frequency of construction-related accidents in large-sized construction sites, small-sized construction sites are more vulnerable because of lack of workforce and less effective technology system. Furthermore, the absence of safety committee, poor financial condition leads to lack of safety education, installation of safety facilities, and provision of individual protective equipment, which indicates difficulties handling even basic safety management. Therefore, in order to lower the hazard rate at small-Sized construction sites, it is necessary to proceed with more structural and thorough actions for preventing accidents. In other words, it is necessary to analyze the causes of the accidents at small-sized construction sites, set criteria for safety management, and suggest safety management items according to work classification by evaluating the relative importance of the items.

• Transactions of the KSME C: Technology and Education
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• v.1 no.1
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• pp.75-81
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• 2013

Shale gas has the potential to significantly change the way of the world's energy use. However, there are increasing concerns on environmental problems, particularly with respect to water use and wastewater treatment. This paper highlights issues related to shale gas water management and technologies currently used to address them. It also presents perspectives of emerging technologies for the treatment of shale gas wastewater, including forward osmosis (FO) and membrane distillation (MD).

• Journal of Preventive Medicine and Public Health
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• v.51 no.3
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• pp.148-153
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• 2018

Objectives: Malaria remains a public health concern worldwide, including Indonesia. Purworejo is a district in which endemic of malaria, they have re-setup to entering malaria elimination in 2021. Accordingly, actions must be taken to accelerate and guaranty that the goal will reach based on an understanding of the risk factors for malaria. Thus, we analysed malaria risk factors based on human and housing conditions in Kaligesing, Purworejo, Indonesia. Methods: A case-control study was carried out in Kaligesing subdistrict, Purworejo, Indonesia in July to August 2017. A structured questionnaire and checklist were used to collect data from 96 participants, who consisted of 48 controls and 48 cases. Univariate, bivariate, and multivariate analyses were performed. Results: Bivariate analysis found that education level, the presence of a cattle cage within 100 m of the house, not sleeping under a bednet the previous night, and not closing the doors and windows from 6 p.m. to 5 a.m. were significantly ($p{\leq}0.25$) associated with malaria. Of these factors, only not sleeping under a bednet the previous night and not closing the doors and windows from 6 p.m. to 5 a.m. were significantly associated with malaria. Conclusions: The findings of this study demonstrate that potential risk factor for Malaria should be paid of attention all the time, particularly for an area which is targeting Malaria elimination.

• Journal of Korean Society of Environmental Engineers
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• v.28 no.4
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• pp.402-406
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• 2006

N-Nitrosodimethylamine(NDMA) formation was studied as a function of chloramine concentration at a fixed dimethylamine (DMA) concentration of 0.05 mM at pH 7 and 8. Regression equations were developed by molar ratio of chloramine to DMA. The NDMA formation was dependent on molar ratio(chloramine/DMA) and was different when the ratio is less or greater than 1. The formation of NDMA increased with increasing chloramine concentration and a linear correlation was examined between NDMA concentration and the ratio on a log scale. The developed regression was applied to previously reported data and relative errors ranged from -79 to 163%. Regression equations could provide a potential tool to predict NDMA formation for a simple and quick estimation in water supply systems.