• 제목/요약/키워드: natural phenomena

검색결과 751건 처리시간 0.025초

패션제품 쇼핑을 통한 리테일 테라피 효과에 대한 질적 연구 (Qualitative Research on Fashion Product Shopping and Retail Therapy)

  • 안가영;이유리
    • 한국의류학회지
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    • 제42권3호
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    • pp.411-427
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    • 2018
  • This study is to understand the inner psychological state of consumers who pursue a retail therapy effect through fashion product shopping. Qualitative research on the whole process from the point of time of occurrence of shopping motivation to the end of shopping motivation was performed. The researcher became a virtual shopping partner during shopping and conducted a natural conversation interview using a mobile instant messenger program (Kakao Talk). After shopping, participants were asked to write a diary on that day. Collected data were analyzed by applying the grounded theory approach suggested by Strauss and Corbin (1998). Casual Condition, represented everyday stress and Contextual Condition indicated the self-healing consumption trend. Main Phenomena showed a mood change during the fashion shopping process. The sense of emancipation from the place, the satisfaction from the maintenance of social relations, and the sense of accomplishment through purchases were revealed. Intervening Condition showed the consideration in the process of shopping for fashion products, such as providing a try-on experience, price promotion, and involvement of a companion. Action Interaction Strategy was the shopping behavior for the positive emotion increase and negative emotion decrease. Consequence represented a retail therapy in shopping for fashion products.

PC-KIMMO-based Description of Mongolian Morphology

  • Jaimai, Purev;Zundui, Tsolmon;Chagnaa, Altangerel;Ock, Cheol-Young
    • Journal of Information Processing Systems
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    • 제1권1호
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    • pp.41-48
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    • 2005
  • This paper presents the development of a morphological processor for the Mongolian language, based on the two-level morphological model which was introduced by Koskenniemi. The aim of the study is to provide Mongolian syntactic parsers with more effective information on word structure of Mongolian words. First hand written rules that are the core of this model are compiled into finite-state transducers by a rule tool. Output of the compiler was edited to clarity by hand whenever necessary. The rules file and lexicon presented in the paper describe the morphology of Mongolian nouns, adjectives and verbs. Although the rules illustrated are not sufficient for accounting all the processes of Mongolian lexical phonology, other necessary rules can be easily added when new words are supplemented to the lexicon file. The theoretical consideration of the paper is concluded in representation of the morphological phenomena of Mongolian by the general, language-independent framework of the two-level morphological model.

다산(茶山) 역학(易學)의 의학적 응용 (Study on Application of Dasan's I Ching for Oriental Medicine)

  • 임명진;김병수;강정수
    • 동의생리병리학회지
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    • 제19권2호
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    • pp.347-357
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    • 2005
  • The medicine through I Ching(The Book of Changes, 易經) is a field of the medical science, which studies physiology, pathology and Yin-Yang philosophy. From ancient times so many scholars have studied I Ching and they are divided into two different school. one is the school of Image and Number(象數學派), the other is the school of reason(義理學派). Dasan Jung Yak-Yong(茶山 丁若鏞) is a distinguished scholar in the I-Ching study, and he had a unique opinion in the analysis about sentences of I Ching. He has done his best to make 'Image and Number(象數)' harmonize with reason(義理). I Ching is the book about changes, which includes everything like natural phenomena, human body and mind. So we can understand human physiology and pathology through I Ching.

위성원격탐사와 지구과학 - 위성해양학 - (Satellite Remote Sensing and Earth Science -Satellite Oceanography-)

  • 윤홍주
    • 대한원격탐사학회지
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    • 제15권1호
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    • pp.51-60
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    • 1999
  • 오늘날 위성원격탐사의 제분야는 새로운 첨단과학기술로서 지구과학분야에서 중요한 자리메김을 하고 있다. 1998년은 UN이 제정한 세계해양의 해이다. 따라서 이를 기념하여 위성해양학에 관련되는 사항들을 재정리해보고 나아가 해양수산의 과학기술분야 관련 전문종사자들에게 새롭게 알리는 것도 매우 의미 있는 일이라 하겠다. 아울러 본 총설은 끝부분에 기재한 위성원격탐사와 관련된 여러 서적들을 참고로 하여 편술하였음을 밝혀둔다.

공동주택 침기의 불확실성 분석 (Infiltration in Residential Buildings under Uncertainty)

  • 현세훈;박철수;문현준
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2006년도 하계학술발표대회 논문집
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    • pp.369-374
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    • 2006
  • Quantification of infiltration rate is an important issue in HVAC system design. The infiltration in buildings depends on many uncertain parameters that vary with significant magnitude and hence, the results from standard deterministic simulation approach can be unreliable. The authors utilize uncertainty analysis In predicting the airflow rates. The paper presents relevant uncertain parameters such as meteorological data, building parameters (leakage areas of windows, doors, etc.), etc. Uncertainties of the aforementioned parameters are quantified based on available data from literature. Then, the Latin Hypercube Sampling (LHS) method was used for the uncertainty propagation. The LHS is one of the Monte Carlo simulation techniques that is suited for our needs. The CONTAMW was chosen to simulate infiltration phenomena in a residential apartment that is typical of residential buildings in Korea. It will be shown that the uncertainty propagating through this process is not negligible and may significantly influence the prediction of the airflow rates.

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2년후에 발거가 가능했던 기관 cannula 발거곤란병 (A Successful Decannulation Case Two Years Later A Tracheostomy)

  • 이종원;김종영;김성곤;권령춘;양한모
    • 대한기관식도과학회:학술대회논문집
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    • 대한기관식도과학회 1976년도 제10차 학술대회연제 순서 및 초록
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    • pp.87.3-87
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    • 1976
  • 병례 환자 : 강○종 4세 남자, 주소 : 기관 cannula 발거시의 호흡곤란, 병력 : 래원 2년전 소아과에서 기관절개술을 받았으며, 기관절개술 1개월후에 기관 cannula 발거곤란병으로 재수술을 받았음. 경과 : 양친에 의해 cannula corking 하에서 정상기도를 통한 호흡연습을 하여 1976년 3월 16일 본 교실에서 아무런 후유증 없이 기관 cannula를 발거하여 2일후 퇴원하였음. 2년간 기관 cannula의 발거가 곤란했던 5세 남아에서 기관 cannula 발거후 아무런 지장이 없었던 1례를 경험하였기에 보고한다. 정상기도를 통한 호흡곤란이 내외과적 수단을 가하지 않고 2년후에 기관 cannula의 발거가 가능했다는 사실은 1종의 자연치료현상으로 보아야 할 것이다. 물론 high tracheostomy로 인하여 cricoid cartilage의 손상, perichondritis, granulation 및 성문하종창의 동반이 있었다. 이러한 호흡곤란이 성장에 수반되는 기관성장이나 cannula corking 하에서 정상기도를 통한 꾸준한 호흡연습이 2년후에 기관 cannula의 발거를 가능케 했다고 볼 수도 있으나 암의 자연치료현상을 면역으로 설명하는 것과 같이 이러한 병례도 면역에 의한 자연치유나 unknown factor 등을 부가하여 생각할 수도 있겠다.

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MODELING OF A BUOYANCY-DRIVEN FLOW EXPERIMENT IN PRESSURIZED WATER REACTORS USING CFD-METHODS

  • Hohne, Thomas;Kliem, Soren
    • Nuclear Engineering and Technology
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    • 제39권4호
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    • pp.327-336
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    • 2007
  • The influence of density differences on the mixing of the primary loop inventory and the Emergency Core Cooling (ECC) water in the downcomer of a Pressurised Water Reactor (PWR) was analyzed at the ROssendorf COolant Mixing (ROCOM) test facility. ROCOM is a 1:5 scaled model of a German PWR, and has been designed for coolant mixing studies. It is equipped with advanced instrumentation, which delivers high-resolution information for temperature or boron concentration fields. This paper presents a ROCOM experiment in which water with higher density was injected into a cold leg of the reactor model. Wire-mesh sensors measuring the tracer concentration were installed in the cold leg and upper and lower part of the downcomer. The experiment was run with 5% of the design flow rate in one loop and 10% density difference between the ECC and loop water especially for the validation of the Computational Fluid Dynamics (CFD) software ANSYS CFX. A mesh with two million control volumes was used for the calculations. The effects of turbulence on the mean flow were modelled with a Reynolds stress turbulence model. The results of the experiment and of the numerical calculations show that mixing is dominated by buoyancy effects: At higher mass flow rates (close to nominal conditions) the injected slug propagates in the circumferential direction around the core barrel. Buoyancy effects reduce this circumferential propagation. Therefore, density effects play an important role during natural convection with ECC injection in PWRs. ANSYS CFX was able to predict the observed flow patterns and mixing phenomena quite well.

Carbonate scale reduction in reverse osmosis membrane by CO2 in wastewater reclamation

  • Shahid, Muhammad Kashif;Pyo, Minsu;Choi, Young-Gyun
    • Membrane and Water Treatment
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    • 제8권2호
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    • pp.125-136
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    • 2017
  • Reverse osmosis technology is being used on large scale for treatment of ground water, brackish water, wastewater and sea water. The most challenging issue in RO process is carbonate scaling which is directly linked with the efficiency and economy. Considering the natural phenomena of carbonate scaling different adaptations have been made to control scaling on the surface of RO membrane including acid dosage and antiscalant addition. As carbonate scaling is directly related with pH level of feed water, present study describes an experimental approach to reduce scaling on RO membrane by lowering the feed water pH by purging $CO_2$. In this comparative study four different conditions including control process (without any scale inhibitor), with dosage of antiscalant, with purging of $CO_2$ and with co addition of antiscalant and $CO_2$ in a feed stream line; it was established that $CO_2$ is a better appliance to reduce carbonate scaling on the membrane surface by reduce pH of feed stream. It was also observed that $CO_2$ and antiscalant mutually function better for scale control.

Nonlinear vibration analysis of carbon nanotube reinforced composite plane structures

  • Rezaiee-Pajand, Mohammad;Masoodi, Amir R.;Rajabzadeh-Safaei, Niloofar
    • Steel and Composite Structures
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    • 제30권6호
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    • pp.493-516
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    • 2019
  • This paper is dedicated to nonlinear static and free vibration analysis of Uniform Distributed Carbon Nanotube Reinforced Composite (UD-CNTRC) structures under in-plane loading. The authors have suggested an efficient six-node triangular element. Mixed Interpolation of Tensorial Components (MITC) approach is employed to alleviate the membrane locking phenomena. Moreover, the behavior of the well-known LST element is considerably improved by applying an additional linear interpolation on the strain fields. Based on the rule of mixture, the properties of CNTRC are obtained. In this study, only the uniform distributed CNTs are employed through the thickness direction of element. To achieve the natural frequencies and shape modes, the eigenvalue problem is also solved. Using Total Lagrangian Principles, large amplitude free vibration is considered based on the first normalized mode shape of structure. Different well-known plane problem benchmarks and some proposed ones are studied to validate the accuracy and capability of authors' formulations. In addition, the effects of length to the height ratio of beam, CNT's characteristics, support conditions and normalized amplitude parameter on the linear and nonlinear vibration parameters are investigated.

Performance evaluation of the lightweight concrete tapered piles under hammer impacts

  • Tavasoli, Omid;Ghazavi, Mahmoud
    • Geomechanics and Engineering
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    • 제18권6호
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    • pp.615-626
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    • 2019
  • Lightweight concrete (LWC) provides an attractive alternative to conventional piles by improving the durability of deep foundations. In this paper, the drivability of cylindrical and tapered piles made of lightweight and common concrete (CC) under hammer impacts was investigated by performing field tests and numerical analysis. The different concrete mixtures were considered to compare the mechanical properties of light aggregate which replaced instead of the natural aggregate. Driving tests were also conducted on different piles to determine how the pile material and geometric configurations affect driving performance. The results indicated that the tapering shape has an appropriate effect on the drivability of piles and although lower driving stresses are induced in the LWC tapered pile, their final penetration rate was more than that of CC cylindrical pile under hammer impact. Also by analyzing wave propagation in the different rods, it was concluded that the LWC piles with greater velocity than others had better performance in pile driving phenomena. Furthermore, LWC piles can be driven more easily into the ground than cylindrical concrete piles sometimes up to 50% lower hammer impacts and results in important energy saving.