• 복식
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• 제63권8호
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• pp.143-155
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• 2013

The outdoor apparel market has been growing very fast recently, and consumers are spending more time doing outdoor activities for their leisure. As the outdoor apparel market is growing, it has started to combine functionality with style to provide more diverse designs and colors for all ages. The increase of interest in heathy life-styles, outdoor activities, and leisure has lead to a rise in demand for outdoor apparel. Now outdoor apparel have become a part of people's daily casual wear in addition to being worn for outdoor activities. This study is focused on a outdoor jacket design which is used as down-alternative material and the purpose of this study is to design outdoor jackets using a down-alternative fabrics that improve the thermal and lightweight effects for clothing comfort, and increase the satisfaction of wearing down-alterative outdoor jacket. The research of this paper was done by using a questionnaire survey. The survey was used to examine the male customers' outdoor activities, purchase behaviors, place, expense and design preferences. Then, down-like fabric was used to make the prototype down jacket and its design, function, and satisfaction with wearing compared with other brands down jacket products were analyzed. Although duck down fabrics are representative of outdoor jackets, they have many problems that need to be solved such as feathers falling out or its vulnerability to moisture. They have competitive prices compared to down jackets so down-alternative jackets are able to gain more proportion of its market share.

• 한국시뮬레이션학회논문지
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• 제10권1호
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• pp.51-62
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• 2001

For the productivity improvement, it is necessary to analyze problem of the system and evaluate alternative plans. But, it if hard to experiment and evaluate alternative plans in real existing system. Therefore, it is necessary to synthetically analyze and evaluate alternative plans using simulation and statistical analysis method. In this case study, as a simulation language, Promodel is used to compare and evaluate four alternatives which are considered to improve the productivity of an object system. The object system is constituted of a pretreatment line and a painting line. The purpose of this study is to analyze whether the decrease of the down time in pretreatment line can be effective to the productivity improve comparing with exiting system and other alternatives. The other purpose is to choose an alternative that has the best productivity improvement. The results of the simulation show that the possibility of improvement in productivity by decreasing the down time of pretreatment line. Two-Stage Bonferroni Procedure is used to choose the best alternative.

• 대한기계학회논문집B
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• 제22권3호
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• pp.408-415
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• 1998

This study presents experimental results on the shut-down and start-up characteristics of a residential split-system air-conditioner with capillary tube, using R410A as a R22 alternative refrigerant. During shut-down, the transient characteristics are evaluated by measuring the high side and low side pressures and temperatures of the system. The dynamic behavior of the system after start-up is also investigated at the high temperature cooling test condition. All experiments are performed in psychrometric calorimeter. The cooling capacity, power consumption, dehumidification capacity and cycle characteristics after start-up are analyzed.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2004년도 춘계학술발표회
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• pp.58-65
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• 2004

Recently, the top & down method with drilled shafts as a foundation of high rise building is often adopted for the purpose of construction period reduction and construction cost effectiveness. It is common to omit the loading test as a Quality assurance on account of the high capacity of drilled shafts for the top & down method. It seems that the capacity of drilled shaft in recent top & down method is beyond that of conventional loading test method.However, the quality assurance for the drilled shaft as foundation of high rise building becomes much more important since the drilled shaft should bear much higher working load. It may be a small scale test pile could be an alternative as a quality assurance for the drilled shaft with high capacities. Through a case study, this paper gives an idea for solving the limitation of the conventional loading test method for the quality assurance of drilled shaft with high capacities. In particular, this paper analyzed the scale effect for a small drilled shaft installed into bedrock, which could be used for an alternative.

• Journal of Radiation Protection and Research
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• 제10권2호
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• pp.89-95
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• 1985

연속감속근사법(CSDA)과 감속평균선질계수를 이용하여 선량당량 정의에서의 본래의 LET분포 개념을 하전입자속 스펙트럼의 개념으로 변환함으로써 새로운 선량당량 산정법을 도출하였다. 이 산정법을 몬테칼로법에 적용함으로써 주어진 방사선장에 위치한 피사체 내에서의 선량당량을 직접적으로 간편하게 산출할 수 있다. 산정에 필요한 감속평균 선질계수는 중성자와 연조직과의 상호작용으로부터 발생될 수 있는 모든 하전입자에 대하여 10 MeV 이하의 에너지 범위에서 산출하여 제시하였다.

• 한국지반공학회논문집
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• 제20권5호
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• pp.117-126
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• 2004

최근 건축구조물이 대형화됨에 따라 현장타설말뚝을 이용한 Top-Down공법이 공기단축 및 경제성 등의 이유로 자주 채택되고 있다. Top-Down 기초로 시공되는 현장타설말뚝의 경우 설계하중이 크다는 이유로 인해 품질확인용 재하시험을 생략하는 경우가 대부분이며, 대규모 설계하중을 검증하기 위한 전통적인 재하시험 방법 또한 적용하기 곤란한 경우가 많다. Top-Down 공법에 있어 건축구조물의 대형화에 의한 현장타설말뚝의 사용하중이 증대됨에 따라 현장타설말뚝에 대한 품질확인은 점차 중요시되고 있으며, 이에 대한 대안으로서 축소모형말뚝을 이용한 시험방법의 적용이 가능할 것으로 판단된다. 본 연구에서는 대구경 현장타설말뚝의 지지력 측정시 전통적인 재하시험 방법의 한계를 극복하기 위하여 축소모형말뚝을 이용하는 방안을 제시하였으며 특히, 시험결과의 해석을 위해 암반에 근입된 현장타설말뚝의 치수효과에 관한 분석 방법을 제안하고 평가해 보았다.

• 한국정보전자통신기술학회논문지
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• 제4권4호
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• pp.307-310
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• 2011

이 논문은 1년에 몇 일 혹은 몇 시간 동안 만 최대 에너지가 공급된다. 그러므로 일반적인 경우에는 대부분 최대 에너지의 50%나 이보다 적은 양의 에너지를 얻게 된다. 이런 작은량의 에너지가 공급되는 Alternative Energy system (P. Voltac System)하에서 용수공급을 위해 기존의 Centrifugal pump를 사용 할 때와 Screw type pump를 사용할 때 공급된 용수량을 비교하였다. 연구 결과 Screw type pump 사용 시 alternative Energy system의 높이에 상관없이 단지 Screw type pump의 speed에 영향을 받으며 낮은 Energy 하 에서도 비교적 높은 효율을 낸다는 것을 실험적으로 비교 검토 하였다.

• 설비공학논문집
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• 제27권6호
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• pp.321-327
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• 2015

This study presents an HFC152a refrigerant air conditioner as an alternative to HFC134a, which is currently used in mobile air conditioning systems. Cool-down performance tests of an HFC152a air conditioning system were conducted and compared to a baseline HFC134a air conditioner. The experimental set-up consisted of a belt-driven compressor, a sub-cooled type condenser, an evaporator, and a block-type thermal expansion valve (TXV). A drop-in test was carried out on the mobile air conditioning system under various vehicle running speeds in a climate-controlled wind tunnel (CWT). Additionally, to optimize the HFC152a air conditioning system, the effects of the TXVs on the performance were studied. The results show that compared to the HFC134a air conditioning system, the refrigerant charge quantity was reduced by approximately 20%, the discharge pressure was reduced by about 350~430 kPa, and the air discharge temperature at vehicle running conditions was $0.5{\sim}1.5^{\circ}C$ lower. In addition, good compressor durability was expected due to the lower compression ratio.

• 대한약침학회지
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• 제25권3호
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• pp.149-185
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• 2022

Objectives: The Barak Valley is well known for its rich diversity of medicinal plants. Ethnomedicinal practices are prominent among Barak Valley's major and minor ethnic groups. This systemic review focuses on traditionally used medicinal plants found in the Barak Valley as reported in different ethnobotanical surveys. Methods: We searched various databases, including PubMed, Web of Science, and Google Scholar, to find ethnomedicinal surveys conducted in the Barak Valley. The search was performed using different terms, including ethnomedicinal survey, folk medicine, indigenous knowledge, and Barak Valley. Potential articles were identified following the exclusion and inclusion criteria. Results: A total of eight ethnobotanical surveys were included in this study. We identified a total of 216 plant species belonging to 167 genera and 87 families, which are widely used by the ethnic communities who live in the rural areas of Barak Valley for the treatment of various diseases and ailments. Conclusion: Folk medicine is the result of decades of accumulated knowledge and practices by people who live in rural communities based on their needs and provides an important source of information to assist the search for new pharmaceuticals. Therefore, available information on traditional medicinal plants needs to be explored scientifically to find effective and alternative treatments for different diseases.

• 대한치과교정학회지
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• 제51권5호
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• pp.346-354
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• 2021

Objective: To compare the effectiveness of ibuprofen, acetaminophen, and chewing gum for orthodontic pain relief and to assess if chewing gum can be a non-pharmacological alternative for orthodontic pain relief. Methods: The study enrolled 106 patients of both sexes, aged ≥ 12 years, with body weight > 50 kg, and mild-to-moderate dental crowding in the upper arch. After randomization and allocation concealment, the intervention groups were either administered with ibuprofen (400 mg) or acetaminophen (500 mg) or chewed sugar-free chewing gum immediately after initial archwire placement and every 6 hours for 1 week if the pain persisted. The control group did not receive any pain relief. The pain was assessed on a 100-mm visual analog scale at rest and while biting down at T1 (2 hours), T2 (24 hours), T3 (2 days), T4 (3 days), T5 (7 days), and T6 (21 days). Statistical analyses were performed using the Kruskal-Wallis and post-hoc Mann-Whitney U tests (α = 0.05). Results: The chewing gum group experienced more pain relief than the ibuprofen group at while biting down at T3 (p = 0.04) and at rest at T4 (p < 0.001). The chewing gum group reported more pain relief than the acetaminophen and control groups while biting down at T3 (p = 0.03 and p = 0.0006, respectively) and T4 (both p < 0.001). Conclusions: Chewing gum can be a non-pharmacological alternative for orthodontic pain relief at 2 and 3 days after initial archwire placement.