• ETRI Journal
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• 제39권5호
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• pp.718-728
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• 2017

Empirical modeling of wireless fading channels using common schemes such as autoregression and the finite state Markov chain (FSMC) is investigated. The conceptual background of both channel structures and the establishment of their mutual dependence in a confined manner are presented. The novel contribution lies in the proposal of a new approach for deriving the state transition probabilities borrowed from economic disciplines, which has not been studied so far with respect to the modeling of FSMC wireless fading channels. The proposed approach is based on equal portioning of the received signal-to-noise ratio, realized by using an alternative probability construction that was initially highlighted by Tauchen. The associated statistical procedure shows that a first-order FSMC with a limited number of channel states can satisfactorily approximate fading. The computational overheads of the proposed technique are analyzed and proven to be less demanding compared to the conventional FSMC approach based on the level crossing rate. Simulations confirm the analytical results and promising performance of the new channel model based on the Tauchen approach without extra complexity costs.

• Steel and Composite Structures
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• 제22권3호
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• pp.647-662
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• 2016

This study aims to monitor the variation of modal frequencies of steel buildings during their construction sequence. In this respect, construction of a steel building is followed by vibration based measurements. The monitored building is a three-story educational building within a building group whose structural system consists of steel moment resisting steel frames and eccentric braces. Five different acceleration measurements in two perpendicular directions are taken on five different construction stages, starting from the erection of the columns and beams ending with the completion of the construction. The recorded measurements are transferred into frequency domain and the dominant frequencies for each case have been determined. The change in the dominant frequencies is evaluated with the existing construction stages and performed constructional works between the stages. The last measurement, performed on the building in service, revealed the first two dominant frequencies as mutual in X and Y direction, showing that these dynamic modes are torsional modes. This result is investigated by numerical analysis performed with finite element model of the building constructed for design purpose. Lower frequencies and different mode shapes are determined from numerical analysis. The reason of lower frequencies is discussed and the vibration survey is extended to determine the effects of an adjacent building. The results showed that the building is in strong relation with an adjoining building in spite of a designed construction joint.

• 한국보육지원학회지
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• 제9권1호
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• pp.241-262
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• 2013

본 연구에서는 자유선택활동 시간에 일어나는 만4세반 유아의 다양한 모습을 관찰하고 분석해 봄으로써 또래문화의 특성을 이해하고 유아의 내면에 한걸음 더 다가갈 수 있는 장을 마련해 보고자 하였다. 이를 위해 서울에 위치한 S 어린이집 만4세 하늘반의 자유선택활동을 참여관찰하고 교사와 유아와의 면담을 통해 질적연구를 실시하였다. 연구 결과, 상호 존중하는 또래관계와 순응하는 또래관계를 통해 형성되는 '평화적 또래문화,' 그리고 수직적 또래관계, 배타적 또래관계, 무시형 또래관계를 통해 형성되는 '갈등적 또래문화'가 나타났다. 본 연구에서는 유아들의 관계형성 분석을 통해 만4세 유아의 또래문화를 밝혀 봄으로써 유아의 내면세계를 이해하고 유아의 교실문화를 폭넓게 바라 볼 수 있는 기초자료를 제공했다는 것에 의의가 있다.

• 한국주거학회논문집
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• 제24권3호
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• pp.109-119
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• 2013

Today's urban spaces require diverse functions according to segmented social changes. Urban public space needs to be a field of mutual exchange, respect of diversity, and communication. According to these needs, an identity which reaches the public should be developed and realized. Therefore, this study is to present indexes for evaluating public space as a means to improve urban identity along with developing an awareness of possible problems. For this purpose, this study found out and analysed factors of evaluation indexes for the most fundamental public spaces which form cities in order to develop directions for deciding on indexes for public space and activation of that public space. An empirical analysis was conducted with the use of a questionnaire with evaluation indexes, reliability, and validity of properties of the space to be analysed and the evaluation items were tested. Based on the results, the study compared and analysed the differences between groups with independent variables (evaluation indexes) and general characteristics through a t-test. As a result, it was discovered that easy and safe accessibility in the use of urban parks as public space was statistically significant. Such results show that accessibility is the most significant factor in the use of parks.

• 가정∙방문간호학회지
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• 제21권1호
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• pp.60-68
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• 2014

Purpose: The purpose of this study was to analyze the differences between gender identity, gender equality, and self-esteem among nursing college students. Methods: The subjects were nursing college students who were selected from 4 different nursing colleges. We measured gender identity, gender equality, and self-esteem using verified measurement tools. Data were analyzed using descriptive and comparative statistical methods. Results: Gender equality among nursing college students showed a significant difference between male students and female students. Male students had higher gender equality scores than female students on all 4 types of gender equality. Conclusion: Male nursing college students that there are differences in gender equality, especially in the areas of education and employment. Based on these results, we suggest that future work should focus on developing a curriculum to increase awareness of gender equality among under graduate students, and thereby build an organizational culture of mutual respect for gender equality among clinical nurses.

• 정보학연구
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• 제1권1호
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• pp.1-11
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• 1998

시장에서의 치열한 경쟁으로 오늘날의 기업들은 고객에게 더 나은 제품과 서비스를 제공하면서도 동시에 가격 경쟁우위를 잃지 말아야만 하는 상충되는 과제를 안고 있다. 그러한 관점에서 효과적인 물류관리는 기업에 있어 매우 유용한 경쟁우위의 원천이 될 수 있을 것이다. 이를 위해 많은 기업들은 통합적인 공급체인관리(supply chain management)를 통해 공급체인내의 모든 기업들이 공생하고자 하는 목표를 추구하고 있다. 그러나 상이한 운영시스템과 조직특성을 가진 기업간의 연계로 공급체인내에 비효율성이 발생할 가능성이 매우 높다. 정보시스템의 활용은 그러한 비효율성을 제거하고 더 나아가 경쟁우위를 확보하는 수단으로 부각되고 있다. 본 연구에서는 특히 공급체인내에서 정보의 통합화가 물류성과에 미치는 영향을 분석함으로서 공급체인관리에서 정보시스템의 역할을 재고하고자 한다.

• 한국터널지하공간학회 논문집
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• 제13권4호
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• pp.291-304
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• 2011

최근 국내에는 해저터널에 대한 관심이 높아지고 있다. 심부에 시공되는 해저터널의 경우에는 높은 수압의 영향을 무시할 수 없다. 이러한 해저터널의 안정성을 위하여 그라우팅보강 등이 필요하다. 따라서 본 연구는 해저터널의 시공시 그라우팅으로 인해 발생하는 차수효과와 전단강도 증가효과가 터널의 안정성에 미치는 영향을 살펴보았다. 이를 위해 RMR 분류법을 기준으로 할 때 1, 3, 5 등급 암반을 대상으로 그라우팅 보강영역의 범위와 투수계수 및 점착력을 달리하여 민감도 분석을 위한 2차원 수리-역학적 연계 해석을 수행하였다. 해석결과의 분석을 통해 해저터널의 그라우팅으로 인한 강도증가와 차수로 인해 증가되는 수압의 상호관계를 조사하였다.

• 비교문화연구
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• 제29권
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• pp.153-176
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• 2012

This study focused on concretely how minority group's attitude accepting han-zu's culture changes. In the past, minority group's culture and han-zu's culture were acculturated spontaneously, not forcibly. But as the people's republic of china was founded and control of chinese government was intensified, control and interference of minority group area became aggressive, and acculturation became compulsory. However, after chinese economic reform, by economic affluence and modernization and urbanization according to economic affluence, acculturation of minority group's culture and han-zu's culture is changing from forced acculturation to spontaneous acculturation. Still there are some areas where mutual friction lasts because of forced acculturation. But except some areas the stream is changing rapidly to spontaneous acculturation. In the text, this study investigated process and present state of acculturation focused on hui-zu that implemented aggressive acceptance of han-zu's culture relatively early. Then this study investigated yi-zu society and cultural change focused on their spontaneous acculturation. In the modern society setting a high value on convenience and personal happiness rather than ideology and value, value of race becomes less attractive to young people of minority group who know modern civilization and convenience of city. In this respect, maybe hui-zu society is future of yi-zu society and minority group society.

• 임상간호연구
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• 제26권3호
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• pp.352-364
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• 2020

Purpose: The purpose of this study was to understand and describe the meaning of the experience of male nurses working in Intensive Care Units (ICU). Methods: Data were collected through in-depth interviews with 8 male nurses. Data were collected from november 2019 to february 2020 and were analyzed using Colaizzi's method, a phenomenological approach. Results: 8 theme clusters, and 28 themes were identified. The 8 clusters were as follows; the feeling of burden in a busy and sensitive situation, the daily life facing life and death, female colleagues and patients who are still difficult to treat, a reliable and grateful male colleague, being proud of this role that a man can do, various experiences that improve me, constant effort to be recognized as a team member, and wavering and weighing in the career. Conclusion: These results could help to expand understanding the role of male nurses working in the ICU and in other areas. In addition, the results provide basic data needed to improve mutual respect and relationships between male and female nurses. It is necessary to offer mentoring programs for male nurses to adapt to nursing field.

• 한류연구
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• 제1권1호
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• pp.1-23
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• 2022

HunMinJeongEum, meaning "the right sound to teach the people," was created in 1443 CE by King Sejong the Great, the fourth king of the Joseon Dynasty. In today's modern language, this letter, called Hangeul, is internationally recognized for its linguistic science. However, it is hard to find a comprehensive study on the fact that King Sejong himself created Hangeul, the Confucian perspective on natural disasters and democracy revealed in the process of writing, the independent efforts emphasized from a certain period, and the achievements of King Sejong, who shared the sorrow of the people and carried out national policies despite the extreme opposition of the nobility. Accordingly, I analyzed the consonants of HunMinJeongEum and looked at the essence of humanity and oriental philosophy (Yin-Yang Five Elements, Sangsu Philosophy, Hado). Surprisingly, different meanings from previous studies and interpretations were found, and King Sejong's "Da Vinci Code," which was left behind in the process of making the consonant, is reinterpreted and revealed. King Sejong's achievements were all connected as one. This is the root of democracy in the Republic of Korea today, and this is why King Sejong was selected as the most beloved and respected historical figure by the Korean people. This study will start with more people's understanding of the fundamental perception and philosophy of the world in Asia, including Korea, to reinterpret and reveal the hardships and great achievements experienced by a leader of a country in the process of creating korean alphabet, and to emphasize democracy, which is an important value for Asians and Westerners' mutual respect and co-prosperity.