스마트건설기술의 적용을 위한 건설안전 제도개선 연구

박경수,임석빈,김세훈,구기영,Park, Kyungsoo,Im, Seokbeen,Kim, Sehoon,Koo, Kiyoung 한국건설안전학회 2020 한국건설안전학회 논문집 Vol.3 No.1

The purpose of this study is to assess legal improvements needed for extended application of smart technologies in construction sites. To achieve the objective of this study, at first, a literature review is conducted to define the concept of construction safety. Secondly, the statistics of construction accidents are assessed and systems and policies for construction safety in developed countries are then analyzed. Also, the applicability of smart safety technologies in the field is examined through recent application cases of construction & related industries. Finally, institutional issues related to the application of smart technology are assessed and policy improvement directions are then introduced. As a result, additional development of smart technologies for small construction sites and continuous policy supports are required. This study will be used as a baseline data for the institutional improvement related to smart construction technologies for domestic construction sites. 본 연구의 목적은 국내 건설현장에서 스마트건설기술의 원활한 도입을 위한 제도적 개선점을 분석하는 것이다. 이를 위해 다음과 같은 수행절차를 따른다. 첫째, 선행연구 고찰을 통하여 건설안전의 개념을 정의한다. 둘째, 건설재해 통계자료 분석 및 국내·외 선진국의 건설 안전관리 체계 및 제도를 분석한다. 셋째, 건설업 및 관련 산업의 스마트 안전기술의 적용 사례를 통해 스마트 안전 기술의 적용성을 고찰한다. 넷째, 기술 적용과 관련한 제도적 문제점 분석하고 정책 방향 및 개선점을 제시한다. 그 결과, 소규모 건설현장에서의 근로자 안전을 위한 기술의 추가적인 개발이 필요하다고 판단되며, 스마트 건설안전 체계를 위한 지속적인 정책적 지원이 필요하다고 분석된다. 본 연구의 결과는 스마트 건설기술의 적용을 위한 제도적 개선의 기초자료로 활용될 것이다.

무카시바나시(昔話)에 서사된 혼인담의 관점 연구

박경수(Park, KyungSoo) 중앙대학교 일본연구소 2018 日本 硏究 Vol.0 No.49

It was understood that the marriage story of ‘Mukashibanashi’ presupposed a hostile awareness against institutions and customs even within family relations. The story about the son-in-law, let a foolish son-in-law go to his wife’s parents’ home alone. In the process, the woman’s wisdom was added to the crisis, but ultimately, it was in the way of reaffirming the stupidity below the level in front of wife’s family. The story about the son-in-law, let a foolish son-in-law go to his wife’s parents’ home alone. In the process, the woman’s wisdom was added to the crisis, but ultimately, it was in the way of reaffirming the stupidity below the level in front of wife’s family. And, It was That the story in the daughter-in–law escape a mother-in-law from hostile relation by the witty and wisdom, or stood up against her with rash and blind character. The marriage story of ‘Waraibanashi’ has relieved family conflicts and victory through a daughter-in-law who is considered the weakest among the family in the male-centered social system. It can be described as explicitly expressing a reversal of the formula of the both ‘stronger equal winner’ or ‘weaker equal loser’. This means the system and customs of the time to suppress the women and establish the patriarchal order, that is the challenge to the established morality and the expression of the popular awareness.

매입형 영구자석 동기전동기의 방사방향 공극자속밀도 분포를 이용한 코깅토크 저감 설계

박경수(Kyungsoo Park),이태용(Tae-Yong Lee),김용재(Yong-Jae Kim),정상용(Sang-Yong Jung) 대한전기학회 2016 대한전기학회 학술대회 논문집 Vol.2016 No.7

K - 비대응 문제를 위한 선형 이하의 평균 시간 알고리즘

박경수(KyungSoo Park),박근수(KunSoo Park) 한국정보과학회 1995 정보과학회논문지 Vol.22 No.5

근사 스트링 매칭에서는 k 비대응 문제와 k 차이 문제가 연구되어져왔다. 길이가 n 인 텍스트 스트링, 길이가 m 인 패턴 스트링과 정수 k 가 주어졌을 때, k 비대응 문제는 텍스트에 나타나는 근사패턴을 찾는 문제인데 여기에서 근사 패턴이란 패턴과의 Hamming 거리가 K 이하인 부분스트링이다. 본 논문에서는 k 비대응 문제를 푸는 두 개의 알고리즘을 제시하는데, 두 알고리즘은 k = O(m/1og m) 를 만족하는 k 에 대하여 O(kn(1og m)m) 평균 시간과 O(m) 메모리를 사용하는 알고리즘이다. 이 두 알고리즘은 Quong이 개발한 O(kn(log m)²/(mlog log m)) 평균 시간과 O(m(log m)²/log log m) 메모리를 사용하는 알고리즘보다 우수한 것이다. In approximate string matching two problems have been considered in the literature, the k-mismatches problem and the k-differences problem. Given a text string of length n, a pattern string of length m, and an integer k, the k-mismatches problem is to find all approximate occurrences of the pattern in the text such that each occurrence has Hamming distance less than or equal to k with the pattern. We present two algorithms for the k-mismatches problem both of which take O(kn(log m)/m) expected time and use O(m) space for k=O(m/log m). These algorithms improve Quong′s O(kn(log m)²/(mlog log m)) expected time algorithm that uses O(m(log m)²/log log m) space.

하이브리드로켓 연소실 형상 변화에 따른 저주파수 압력진동

박경수(Kyungsoo Park),이창진(Changjin Lee) 한국추진공학회 2013 한국추진공학회 학술대회논문집 Vol.2013 No.5

고체로켓 모터 내부에서 L^* 모드, Helmholtz 모드, Chuffing 모드로 인한 저주파수 특성은 연소안정성에 영향을 미치며, 연소실 부피는 저주파수 특성을 변화시키는 중요한 인자이다. 하이브리드 로켓은 고체로켓과 매우 흡사한 내부유동 특성을 가지고 있으므로, 본 연구에서는 연소실과 후연소실의 형상 변화에 따른 저주파수 특성과 연소압력진동에 미치는 영향을 관찰하였다. 연소실의 형상을 변화시킨 결과, 저주파수 특성이 나타나기도 하고 사라지기도 한다. 특히 연소실의 길이를 2배 확장한 경우, 10~30Hz의 영역에서 주파수 크기가 증폭되며 연소압력진동에 영향을 미친다. 이러한 선택적 공진현상은 하이브리드 로켓의 비선형 연소안정성 발생을 설명할 수 있는 중요한 메커니즘이다. The low frequencies of L<SUP>*</SUP>, Helmholtz and Chuffing modes inside the solid rocket motor affect the instability of the combustion, and the volume of combustion chamber affects these low frequency characteristics. Hybrid rocket engine has similar flow characteristics with solid rocket motor. This paper studied the changes on low frequency and pressure fluctuations due to the geometric changes on combustion chamber and after chamber. As geometry of the combustion chamber changes, the low frequency characteristics appears and disappears. Especially when the length of the combustion chamber is doubled, the low frequency at 10~30 Hz is amplified and pressure fluctuation is also affected. This selective mechanism of resonance may explain the reason why non-linear combustion instability occurs in hybrid rocket combustion.

大和田建樹의 『地理敎育世界唱歌』를 통해 본 제국주의 패러다임

박경수(Park, KyungSoo) 중앙대학교 일본연구소 2021 日本 硏究 Vol.- No.55

Owada’s World Changga of Geography Education(1900.10) was found to have focused more on the Japanese government’s internal and external policy directions than on the educational level of world geography. This is seen to be “Enlightening for Civilization and Modernization” and “National Edification Aimed at Advanced Empires,” with an emphasis on Western powers represented by the United States, Britain, France, Germany, and Russia. It presented a vision for growth and development as Western powers have for their citizens (especially teenagers), as an epic focusing on the development of scientific civilization. Owada was indeed a literary scholar faithful to the “social role of the literary man” according to the national policies of the time. His Changga were widely spread among students and the general public, and greatly influenced the formation of the modern Japanese spirit. The World Changga of Geography Education which enabled people to imagine and virtually experience the unknown world, and advertised the Japanese government’s foreign policies by suggesting a paradigm of Japanese imperialism. This was the way literary scholar Owada enlightened his own people.

1930년대 여성작가의 일본어소설 연구

朴京洙(Park, KyungSoo) 중앙대학교 일본연구소 2016 日本 硏究 Vol.0 No.41

『The Osaka daily newspaper』 was provided special section for Korean writers. It is because that they introduced to colonial Korean society and reality of the Korean culture to entire of Japan. Despite of missed their aim, it was significant that they introduced colonial Korean society which has particularities of the mid-1930s and reality of the Korean culture with the colonial woman writers point of view who alienated society and institutional, The 「Penance(苦行)」which is described the joys and sorrows of the urban people written by Malbong-Kim, and the 「Boarding(下宿)」 written by Chun myung-Noh shows the colonial Korean plane. The 「Shade」 written by Jeong hee-Choi, and the 「a nursery song(子守唄)」written by Deukjo-Jang were suggest that how to replaced with "Maternal of militarism". The 「Tukbuja」 written by Shinae-Baek, the 「Place of Jangsan」written by Kyeongae-Kang, and the 「Before and after flood(洪水前後)」 written by Hwaseung-Park are described delicately appearance of colonial layer people who are emphasized on political, social environment as a decision element of fate, and going frustrated of fall depending their environments. However, they expended reality critical view of reader through not criticism and resistive but accommodate side, because strengthening of the social system. In this study that are discussed in the literatures are extremely fragmented as compared to the literary activity of these authors. However, literature of the colony of Women Writers, and colonial social image that has been trapped in their point of view were introduced to Japanese media which is name recognition (famous) through translated Japanese, when it did achieve during the Sino-Japanese War based on Korea, In terms of that large number of Japanese has sympathy, it could be possible to find a decent meaning.

표면 부착형 영구자석 동기전동기의 극/슬롯 조합별 분수 슬롯 집중권의 출력 밀도 특성 비교

박경수(Kyungsoo Park),한원석(Wonseok Han),김현미(Hyun-Mi Kim),김용재(Yong-Jae Kim),김윤환,정상용(Sang-Yong Jung) 대한전기학회 2016 대한전기학회 학술대회 논문집 Vol.2016 No.3

와류간섭에 의한 하이브리드로켓 연소 특성

박경수(Kyungsoo Park),이창진(Changjin Lee),신경훈(Kyung-Hoon Shin) 한국추진공학회 2012 한국추진공학회 학술대회논문집 Vol.2012 No.5

산화제 유동 변화를 위한 디스크를 예혼합실에 장착하여 디스크의 직경과 길이를 변경하며 PMMA/GOx를 이용한 하이브리드 로켓 모터의 지상연소 시험을 수행하였다. 디스크에 의해 산화제 유동의 와류유출(vortex shedding)이 발생하여, 연소율과 압력 진동 등의 연소 특성이 변화하였다. 따라서 하이브리드 로켓에서 발생하는 유동간섭과 연소 특성 사이의 상관관계를 파악하고, 연료 표면에 인접한 곳에서 발생하는 작은 크기의 와류와 예혼합실 안에서 발생하는 와류흘림과의 상호작용에 대해서 알아보기 위해 실험적 연구를 진행하였다. A series of hybrid rocket combustion experiments were carried out with PMMA/GOx changing diameter and length of the disk installed at pre-chamber. The disk can generate vortex shedding flow and change flow conditions prior to entering the fuel grain which could also alter the combustion characteristics and pressure oscillations. The interaction of vortex shedding in the pre-chamber and small-scale vortices adjacent to burning surfaces by using combustion test.

하이브리드로켓 연소실의 와류발생과 연소압력 진동

박경수(Kyungsoo Park),신경훈(Kyung-Hoon Shin),이창진(Changjin Lee) 한국항공우주학회 2013 韓國航空宇宙學會誌 Vol.41 No.1

하이브리드 로켓은 고체로켓과 매우 흡사한 내부유동 특성을 가지고 있으므로 와류흘림(vortex shedding)은 하이브리드 로켓에서도 연소안정성에 영향을 미치는 중요한 인자로 판단된다. 본 연구에서는 예연소실에서 와류를 발생시켜 연료 표면와류와의 간섭과 연소특성 변화를 관찰하였다. 기본 형상과 디스크를 장착한 실험 결과, 5개의 주파수 특성이 관찰되었으며 이들은 각각 추진제의 열적지연에 의한 주파수, 디스크, 연료 단면, 후연소실 단면 변화에 의한 와류흘림과 관련된 주파수임을 확인하였다. 특히 디스크 1과 3의 결과를 비교해 보면 디스크 위치에 따라 변화하는 와류흘림이 연소실의 특정 주파수 특성과 상호 간섭하여 공진이 발생하기도 하지만, 또 다른 경우에는 어떠한 간섭도 일어나지 않는 것을 확인하였다. 이러한 선택적 공진현상은 하이브리드 로켓의 비선형 연소안정성 발생을 설명할 수 있는 중요한 메카니즘으로 판단된다. The similarity in internal flow of solid and hybrid rocket suggests that hybrid rocket combustion can be susceptible to instability due to vortex sheddings and their interaction. This study focuses on the evolution of interaction of vortex generated in pre-chamber with other types of vortex in the combustor and the change of combustion characteristics. Baseline and other results tested with disks show that there are five different frequency bands appeared in spectral domain. These include a frequency with thermal lag of solid fuel, vortex shedding due to obstacles such as forward, backward facing step and wall vortices near surface. The comparison of frequency behavior in the cases with disk 1 and 3 reveals that vortex shedding generated in pre-chamber can interact with other types of vortex shedding at a certain condition. The frequency of Helmholtz mode is one of candidates resulting to a resonance when it was excited by other types of oscillation even if this mode was not discernable in baseline test. This selective mechanism of resonance may explain the reason why non-linear combustion instability occurs in hybrid rocket combustion.