• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2002년도 추계학술발표대회 논문집
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• pp.241-244
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• 2002

Recently, the size of glass panel is increased to $1250 mm{\times}1100 mm{\times}0.7 mm$, whose mass is 2.65 kg, which requires much stiffer robot structure. In addition to the high stiffness, the robot hands and wrists for glass panel handling should have miller surface finishing of its outer surface to prevent particles and dusts from adhering on the surface. The maximum height of the robot structure should not be larger than 1500 mm because other automated guided vehicles (AGV) and transfer equipments have been designed within this size limit. The difference of maximum deflections of the four ends of the hands before and after loading the glass panel should be less than 2.0 mm. In this work, the robot hands and wrists for handling large glass panel displays were designed based on the axiomatic design using the finite element method along with optimization routine.

• 대한공업교육학회지
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• 제37권2호
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• pp.127-146
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• 2012

이 연구의 목적은 기술교육에서 강조되고 있는 체험활동 과제의 개발 절차를 탐색하고 기술 교과의 특성에 맞는 일반화된 개발 절차를 제시하는데 그 목적이 있다. 이 연구를 위한 연구 방법은 주로 문헌 연구에 기초하였으며 체험, 경험, 체험활동에 대한 개념 탐색, 선행 연구자들에 의해 제시된 체험활동의 개발절차를 살펴보고 공통적인 요소를 추출하였다. 연구결과 첫째, 체험과 체험활동의 개념을 살펴보고 기술교육에서 체험활동 과제개발 절차를 고찰하였다. 둘째, 기술교육에서의 체험활동 과제 개발 절차는 준비, 개발, 개선의 3단계 및 세부 단계로 제시하였다. 셋째, 체험활동 과제에 포함되어야 할 내용 구성으로 교사용 자료로 체험활동 제목명, 수업 전 읽어볼 내용, 개요, 과정별 수업 목표, 수업 과정별 주요 활동, 재료, 공구 및 시설, 설계 개요, 참고 자료, 평가표, 세부 수업과정안 등이며, 학생용 자료는 수업목표, 유의사항, 포트폴리오 등을 제시하였다.

• 방사선산업학회지
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• 제11권3호
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• pp.123-130
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• 2017

Concerns about high radiation exposure to the hands of radiation workers who may contact with radioactive contamination on surfaces in a nuclear power plant (NPP) had been raised, and the Korean regulatory body required the extremity dose estimation during contact tasks with radioactive materials. Korean NPPs conducted field tests to identify the incident radiation to the hands of radiation workers who may contact with radioactive contamination during maintenance periods. The results showed that the radiation fields for contact tasks are dominated by high energy photons. It was also found that the radiation doses to the hands of radiation workers in Korean NPPs were much less than the annual dose limits for extremities. This approach can be applicable to measure and estimate the extremity dose to the hands of medical workers who handle the radioactive materials in a hospital.

• 대한인간공학회지
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• 제30권5호
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• pp.597-603
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• 2011

Objective: The objective of this study was to compare one-hand and two-hands lifting activity in terms of biomechanical stress for the range of lifting heights from 10cm above floor level to knuckle height. Background: Even though two-hands lifting activity of manual materials handling tasks are prevalent at the industrial site, many manual materials handling tasks which require the worker to perform one-hand lifting are also very common at the industrial site and forestry and farming. Method: Eight male subjects were asked to perform lifting tasks using both a one-handed as well as a two-handed lifting technique. Trunk muscle electromyographic activity was recorded while the subjects performed the lifting tasks. This information was used as input to an EMG-assisted free-dynamic biomechanical model that predicted spinal loading in three dimensions. Results: It was shown that for the left-hand lifting tasks, the values of moment, lateral shear force, A-P shear force, and compressive force were increased by the average 43%, as the workload was increased twice from 7.5kg to 15.0kg. For the right-hand lifting task, these were increased by the average 34%. For the two-hands lifting tasks, these were increased by the average 25%. The lateral shear forces at L5/S1 of one-hand lifting tasks, notwithstanding the half of the workload of two-hands lifting tasks, were very high in the 300~317% of the one of two-hands lifting tasks. The moments at L5/S1 of one-hand lifting tasks were 126~166% of the one of two-hands lifting tasks. Conclusion: It is concluded that the effect of workload for one-hand lifting is greater than two-hands lifting. It can also be concluded that asymmetrical effect of one-hand lifting is much greater than workload effect. Application: The results of this study can be used to provide guidelines of recommended safe weights for tasks involved in one-hand lifting activity.

• 대한인간공학회지
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• 제32권5호
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• pp.413-420
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• 2013

Objective: The objective of this study was to compare one-hand and two-hands lowering activity in terms of biomechanical stress for the range of lowering heights from knuckle height to 10cm above floor level. Background: Even though two-hands lifting/lowering activity of manual materials handling tasks are prevalent at the industrial site, many manual materials handling tasks which require the worker to perform one-hand lifting/lowering are also very common at the industrial site and forestry and farming. Method: Eight male subjects were asked to perform lowering tasks using both a one-handed as well as a two-handed lowering technique. Trunk muscle electromyographic activity was recorded while the subjects performed the lowering tasks. This information was used as input to an EMG-assisted free-dynamic biomechanical model that predicted spinal loading in three dimensions. Results: It was shown that for the left-hand lowering tasks, the values of moment, lateral shear force, A-P shear force, and compressive force were increased by the average 6%, as the workload was increased twice from 7.5kg to 15kg. For the right-hand lowering task, these were increased by the average 17%. For the two-hands lowering tasks, these were increased by the average 14%. Conclusion: Even though the effect of workload on the biomechanical stress for both one-hand and two-hands lowering tasks is not so significant for the workload less than 15kg, it can be claimed that the biomechanical stress for one-hand lowering is greater than for two-hands lowering tasks. Therefore, it can be concluded that asymmetrical lowering posture would give greater influence on the biomechanical stress than the workload effect for one-hand lowering activity. Application: The result of this study may be used to provide guidelines of recommended safe weights for tasks involved in one-hand lowering activity.

• 공학교육연구
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• 제17권6호
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• pp.62-68
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• 2014

The purpose of this work is to provide systematic lecture materials for instructers who search for the effective teaching of applied mechanics of materials course with respect to lecture contents, teaching methods, and itemized course evaluations according to each class learning objective. For this. the evolution of teaching contents since 2010 until 2014 are briefly depicted and then most recent course learning objectives, lecture contents, and evaluation schemes are presented in detail. The results of this study may be used as base line data for the lecturers who teach similar courses and for the evaluation of program outcomes in ABEEK scheme through course-embedded assessment.

• 동서간호학연구지
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• 제2권1호
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• pp.37-53
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• 1997

The purpose is to inspect the personal medicines in Cheju island that are used traditionally and to get their characteristics. The subjectives are 39 Cheju people, men 10, women 29, who were horned, grown up in Cheju and agreed with this study. The ranges of age are 10 persons(m : 1, w: 9) over 40 less 50 years old, 14(m : 7, w : 7) over 50 less 60, 5(m : 1, w : 4) over 60 less 70, 6(m : 0, w : 6) over 70 less 80, and 4(m : 1, w : 3) over 80. The average age is 64.5 years old. The method to collect the data is 20 structured opening questionaires that are based on references. The duration to collect datas is 11days from 4th, Aprill 1997 to 14th, Aprill 1997. The workers who are trainned the interview methods went their villages and got answers after explaining the purpose and contents to them. Somtimes they used to record the answers. The analysis was identified the subjectives to four regions of Cheju, arranged answers with items, rearranged the same answers, counted with number and percentage. And classified the materials and characteristics. The results of this study are followed: The things that is used as personal medicines are the effects through experiences ans misteries that have hand down by word of mouth, even though they are not scientific. People used the materials arround their circumference. It is an accumulation of experiences. The ways used in eating, doing acupuncture or sting, exposing to smoke, wheedling, fixing after pounding. Almost materials are plants. Mugwort is effective in fever, gastritis, hemorrhoid, diarrhea, edematous hands or feet and dermatitis. Citron and Arrowroot in fever, gastritis. Seeds of Pumpkin in indigestive, hemorrhoid, edematous hands or feet. Gallic in fever, diarrhea, frostbite, dermatitis, and toothache. Motherwort in diarrhea, gastritis. Radish juice in indigestive, jaundice. Bean paste in burn, wound. Acupuncture in fever, gastritis, indigestive, back pain, edematous hands or feet. Sting as similar with it in fever, indigestive, edematous hands or feet. Cigarrette in hemorrhoid, wound, toothache. Cowstools in edematous hands or feet, wound. Sault is usded a lot in fever, gastritis, indigestive, hemorrhoid, uneffective voiding, edematous hands or feet, dermatitis, having a boil around the mouth, toothache, and eye disease. Japanese Parsley in fever, gastritis. Egg Apple in diarrhea, edematous hands or feet, frostbite. And Wild Chrysanthemum is effective in jaundice. In the conclusion, people used the things arround. A things is effective in several symptoms. If these are not effective, they would used the magic as god's anger. As locally, they used the grasses and fruits in the middle of Mt. Halla and seafood on the sea village.

• 산업경영시스템학회지
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• 제37권4호
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• pp.72-81
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• 2014

Even though two-hands lifting/lowering activity of manual materials handling tasks are prevalent at the industrial site, many manual materials handling tasks which require the worker to perform one-hand lifting/lowering are also very common at the industrial site, forestry, farming, and daily life. The objective of this study was to compare one-hand lowering activity to lifting activity in terms of biomechanical stress for the range of lowering heights from knuckle height to 10cm above floor level with two workload 7.5kg and 15.0kg. Eight male subjects with LMM were asked to perform lifting/lowering tasks using both a one-handed (left-hand and right-hand) as well as a two-handed technique. Spinal loading was estimated through an EMG-assisted free-dynamic biomechanical model. The biomechanical stress of one-hand lowering activity was shown to be 43% lower than that of one-hand lifting activity. It was claimed that the biomechanical stress for one-hand lifting/lowering activity is almost twice (194%) of the one for two-hands lifting/lowering activity. It was also found that biomechanical stress by one-hand lowering/lifting activity with the half workload of two-hands lowering/lifting activity was greater than that of the two-hands lowering/lifting activity. Therefore, it might be a risk to consider the RWL of one-hand lowering/lifting activity to simply be a half of the RWL of two-hands lowering/lifting activity recommended by NIOSH.

• 한국실내디자인학회논문집
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• 제26호
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• pp.121-128
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• 2001

This study deals with 'Sachlichkeit' , as essence of materiality that architectural building materials process, which forms the physical basis for actual building. There have beennu merous researches that deals with various elements that compose architecture, but the emphasis seemed to be concentrated on the meta-physical discussion concerning formal concept. An issue on sachlichkeit as materiality does not necessary mean to mention production process of architecture, rather it is aim of this study to seek possibility to find elements that generate architectural form, through interpreting meaning of materials as substructure generator to make architectural possible. Architectural act can be defined as a process where physical material in life is composed into architecture by the hands of architect. Material used in life is composed into architecture by the hands of architect. Material used in this process basically has neutral characteristic, so 'Sachlichkeit'solely depends on the intentions of architects. This study interprets the intention of architects through the frame of modern-basis proposed by Hilberseimer, and a result architecture is defined as an object projected by architect's subjectivity.

• 한국학교수학회논문집
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• 제24권1호
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• pp.151-172
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• 2021

본 연구에서는 이차곡선 지도 방안으로써 수작업 교구인 Wax-paper를 이용한 활동과 공학도구인 GeoGebra를 이용한 활동에 대한 예비 수학교사들의 인식을 조사하였다. 수도권 소재의 한 사범대학 수학교육과 학부생 20명을 대상으로 이차곡선에 대한 교구와 공학도구 활용 수업을 진행한 후, 두 가지 수업 방법에 대한 인식 설문조사를 시행하였다. 본 연구 결과에 따르면, 예비 수학교사들은 이차곡선 학습 및 지도에서 전반적으로 공학도구의 활용을 선호했으며, 공학도구의 활용이 시각화를 통해 직관적 사고에 도움이 되며, 다양한 수학적 성질 탐구를 가능하게 함으로써 개념 이해와 흥미 유발에 도움을 준다고 생각하였다. 그러나 학생 또는 교사의 미숙한 공학도구 사용에 대한 우려를 지속적으로 나타냈으며, 예비 수학교사들이 인식한 교구와 공학도구 활용의 장단점은 상호보완적이었다. 이와 같은 연구 결과를 토대로 수학수업에서 각 교구와 공학도구가 가진 특성에 맞게 상호보완적으로 활용하길 제안하며, 학생 또는 교사의 공학도구 사용 능력에 영향을 받지 않는 수업자료의 개발 및 보급이 필요하다는 시사점을 제시한다.