직교자계가 디펌성능에 미치는 영향

김기찬,김영학,신광호,김휘석,윤관섭,양창섭,Kim, Ki-Chan,Kim, Young-Hak,Shin, Kwang-Ho,Kim, Hwi-Seok,Yoon, Kwan-Seob,Yang, Chang-Sub 한국군사과학기술학회 2011 한국군사과학기술학회지 Vol.14 No.3

An orthogonal magnetic field is often used for a military vessel in the deperm process such as Flash D deperm protocol and Anhysteretic deperm protocol. The effect of the orthogonal magnetic field on a deperm performance was investigated for a sample with strain-induced magnetization and field-induced magnetization given to different direction. A 70mm wide, 110mm long and 0.25mm thick rectangular steel plate was bent to have U-shape and to generate a strong strain on the bottom region of U-shaped steel plate. Field-induced magnetization was attached by NdFeB permanent magnet. Demagnetization was performed by applying magnetic field with a step decrement from the first field(the first shot) under the action of DC bias field.

宇宙의 氣로 興하는 高興

이청하 ( Lee Cheong-ha ),김기찬 ( Kim Ki Chan ) 대한풍수연구학회 2024 대한풍수연구 Vol.12 No.0

It is a name that expresses or symbolizes the existence of all things in the world. It is the earth’s name that permeates the breath of our ancestors spatially, mentally, and culturally. The place name has allowed the wisdom and all kinds of sorrows of the local people to be with the history of life. The place name, which was called in pure Korean, was changed when it was written in Chinese characters, praying for the notes and huns of the Chinese characters. One of the place names that has been called since ancient times has coincidentally matched today’s reality is Goheung. Apart from the friendship of geomancy, the researcher studied several friendships in human civilization, names of medicinal plants, and feng shui geographical friendships. The subject of this study is the history of proudly entering advanced countries in the G7 space era, that is, the region where a satellite of more than 1 ton was launched with its own technology from Oenarodo, and the names of Goheung (Heungyang), Bongnaesan, Oenarodo, Singeum, and Yanae were studied. The 蓬萊 Mountain 羅老 is an ideal world, a site of glory, and the overseas 火 island symbolizes seasoned and mature achievements out of space with the 曳 energy, the 收斂 運 symbolizes Kim Ki-woon’s national 向, and the space industry symbolizes the 財 of 錦 with the new 叡智, so it was concluded that the space industry’s economic profit prediction was in line with the current situation, and that it was a friendly place where one could feel the superior 叡智 of one’s ancestors. In other words, Goheung was prosperous with the luck of Yang Gi-woon.

기업생태계의 건강성과 성공적 플랫폼전략

김기찬(Ki Chan Kim),이성상(Sung Sang Lee),Ruth Angelie B Cruz,John Laurence A Enriquez,백정선(Jung Sun Baek) 한국경영학회 2014 Korea Business Review Vol.18 No.1

인천국제공항은 ACI (Airports Council International)의 공항평가에서 7년 연속으로 세계최우수공항으로 선정되었으며, 이는 인천국제공항의 고객중심의 서비스와 혁신적인 경영활동의 산물로써 한국에 큰 긍지를 심어주었다. 인천국제공항은 출입국, 쇼핑, 환승의 세 개의 상이한 기능이 성공적으로 결합된 건강한 기업생태계를 창조하여왔다. 이는 진취적이며 적극적인 정신을 지니고 변화와 혁신을 위해 상호 협력하여 열심히 일하는 인천국제공항과 관련된 모든 공공기관과 민간조직체 구성원들 공동의 노력과 열정의 결과다. 인천국제공항 생태계의 핵심자 (Keystone)와 리더로써의 인천국제공항공사는 모든 기업생태계 참여자들에게 효과적인 플랫폼을 제공해야 하는 매우 중요한 역할을 수행하고 있다. 본 연구는 인천국제공항과 관련된 서로 다른 여러 기관과 조직체들의 기능과 역할이 어떻게 시너지를 창출함으로써 성공적인 인천국제공항 기업생태계를 구축하고 있는지, 어떻게 기업생태계 참여자들이 서로 협력하고 경쟁력을 키워왔으며 역량을 향상시키고 가치를 공유하는가에 대해 추적하고 분석하였다. 본 연구에서는 인천국제공항 기업생태계 구조를 CPNT (Contents, Platform, Network, Terminal) 모형을 통해 분석하였다. 인천국제공항은 Device관점에서 보면 항공기의 이착륙과 출입국관리를 위한 장소인 터미널에 불과하나 기업생태계관점에서 보면 솔루션뿐 만 아니라 흥분과 감동을 제공하는 플랫폼이라고 할 수 있기 때문이다. 아울러 핵심자 역할을 하고 있는 인천국제공항공사가 어떻게 인천국제공항 플랫폼을 효과적으로 창조하고 실행하여왔는가에 관해서도 연구하였다. 마지막으로 인천국제공항 기업생태계 건강성을 세 가지 건강성지표인 생산성 (Productivity), 강건성 (Robustness), 혁신성 (Niche Creation) (Iansiti & Levien, 2004c)에 의해 평가하였다. 본 연구는 인천국제공항의 경영사례를 기업생태계의 건강성 및 플랫폼 경쟁력차원에서 분석함으로써 새로운 시각에서 기업경영의 전략적 틀을 제공할 수 있을 것이다. Incheon International Airport (IIA) has become the great pride of Korea as it has grown to become a world-class airport rated as the World`s Best Airport for its customer-centered service and innovative activities for seven consecutive years in the World Airport Evaluation held by the Airports Council International (ACI). The airport is creating a healthy business ecosystem in which different functions such as immigration, shopping, and transit have been successfully aligned. This is the result of the collective efforts and passion of all the organizations that have coordinated and worked tirelessly to bring in innovative changes with a dynamic mindset. The role of the Incheon International Airport Corporation (IIAC) is crucial in that it works as a keystone or leader that provides an effective platform for all of its business ecosystem members. This paper traces and analyzes how functions and roles of many different organizations were synergized to create a successful business ecosystem in which members work both cooperatively and competitively, co-evolve capabilities, and share value. The paper also examines the business ecosystem structure of the IIA through the content, platform, network, and terminal (CPNT) model. From a device standpoint, the IIA is just a terminal-a place where aircraft take off and land and immigration is managed-but from a business ecosystem standpoint it is a platform that provides not only solutions but also serendipities and emotions. In addition, we investigate the role of the IIAC as a keystone and how it creates and executes its platform strategy. Finally, the healthiness of the IIA business ecosystem is assessed through the three health indices: productivity, robustness, and niche creation (Iansiti & Levien, 2004c). The paper provides a strategic model for business management from a new perspective through analyzing the healthiness of the business ecosystem and platform competitiveness of the IIA.

국산 장려콩으로 만든 두유의 Mineral, Oxalate 및 Phytate 함량과 품질특성

김기찬(Ki Chan Kim),황인국(In Guk Hwang),김현영(Hyun Young Kim),송항림(Hang Lin Song),김홍식(Hong Sig Kim),장금일(Keum Il Jang),이준수(Junsoo Lee),정헌상(Heon Sang Jeong) 한국식품영양과학회 2010 한국식품영양과학회지 Vol.39 No.8

국산 콩으로 제조한 두유의 품질특성과 무기성분, oxalate 및 phytate 함량을 분석한 결과는 다음과 같다. 두유의 수율 및 고형분 함량은 각각 8.43(보광콩)~9.15 mL/g(봉의콩과 한남콩) 및 4.37°Brix(안평콩)~7.17°Brix(봉의콩) 범위로 나타났으며, pH와 총산도는 각각 6.43~6.86 및 1.48~1.65% 범위를 나타내었다. 점도는 15.73(다원콩)~20.80 cP(한남콩) 범위를 나타내었다. 색도는 검은색 외피를 갖고 있는 청자콩, 다원콩, 선흑콩 및 검정콩4호로 만든 두유의 L값이 작았고 a값은 크게 나타났다. Calcium 함량은 0.714(금강콩)~1.589 ㎎/g(선흑콩) 범위였으며, oxalate 함량은 0.24(안평콩)~2.14 ㎎/g(한남콩), phytate 함량은 0.63(호장콩)~ 2.18 ㎎/g(안평콩) 범위였다. Calcium/oxalate 함량 분포에서 oxalate 함량이 calcium보다 넓은 분포를 나타내었으며, phytate/ oxalate 간에는 phytate가 넓은 분포를 나타내었다. 콩에서 두유로의 oxalate 전이율은 13.6(안평콩)~77.6%(진품콩2호) 범위였으며, phytate는 13.9~87.5%로 동북태가 가장 높았고 호장콩이 가장 낮았다. 이상의 결과를 종합해보면 국산 장려 콩을 이용하여 두유를 제조할 경우 phytate의 전이율이 높고 oxalate의 전이율이 낮은 봉의, 안평콩 및 보광콩이 좋을 것으로 판단되었다. This study was conducted to investigate the changes of quality characteristics, and mineral, oxalate and phytate content during soymilk process. The yields of soymilk ranged from 8.43 mL/g in Bokwangkong to 9.15 mL/g in Bongeuikong and Hannamkong, and total soluble solid contents were ranged from 4.37°Brix in Anpyeongkong to 7.17°Brix in Bongeuikong, respectively. The pH and total acidity of soymilk ranged from 6.43 to 6.86 and from 1.48% to 1.65%, respectively. The viscosity of soymilk was the highest value of 20.80 cP in Hannamkong and the lowest value of 15.73 cP in Dawonkong. The highest value of calcium content of soymilk was 1.589 ㎎/g in Seonheukkong, and oxalate and phytate in soymilk were high at 2.14 ㎎/g in Hannamkong and 2.18 ㎎/g in Anpyeongkong, respectively. The transfer ratio of oxalate from soybean to soymilk was the highest value of 77.6% in Jinpumkong 2, and one of the phytate was the highest value of 87.5% in Dongpuktae and the lowest value of 13.9% in Hojangkong.

『산양지미(山洋指迷)』에서 보는 혈(穴)과 명당(明堂)에 관한 연구

김기찬 ( Kim Ki-chan ) 대한풍수연구학회 2024 대한풍수연구 Vol.13 No.0

This study is a study on the concept of Hyel(穴) and Myeongdang(明堂) in Sanyangjimi, built by Zhu Kyung-il of the Chinese Ming Dynasty. As a result of the study, Sanyangjimi emphasized Hyunggi theory, Sanyong emphasizes Gaemyeon, Pyongyang emphasizes Sokgi. Gaemyeon is described as 8 characters of Bunryeom, Angbok, Hyangbae, and Haphal, and Jibo is described as 8 characters of Jonghoeng, Subang, Pyeonjeon, and Chwisan.

개발효용성에 근거한 기술대체모듈의 선정모형

김기찬(Ki-Chan Kim),안기현(Ki-Hyun Ahn),강일중(Il-Jung Kang),권철신(Cheol Shin Kwon) 한국경영과학회 2007 한국경영과학회 학술대회논문집 Vol.2007 No.11

The object of this research is to evaluate the priority of R&D project alternatives which were already screened by both feasibility and suitability of technological performance. This research is a selection model for R&D project alternatives after setting phase. And it is designed by CHP model which include individual and mutual weights. This model have 5 steps. (1) Setting Technology-Modules derived on the setting phase (2) Presenting the evaluation standards divided with ‘M-Field’ and ‘T-Field’ (3) Assessing the evaluation standard and technology modules (4) Obtaining and integrating the individually and mutually effective weights (5) Selecting the technology modules based on the priority of order by CHP Through these steps, this model can suggest the evaluation way from specific technology levels to project level. And it can be guaranteed to perform the selected module set.

국산 장려콩으로 만든 두부의 Mineral, Oxalate 및 Phytate 함량과 품질특성

김기찬(Ki Chan Kim),황인국(In Guk Hwang),김현영(Hyun Young Kim),송항림(Hang Lin Song),김홍식(Hong Sig Kim),장금일(Keum Il Jang),이준수(Junsoo Lee),정헌상(Heon Sang Jeong) 한국식품영양과학회 2010 한국식품영양과학회지 Vol.39 No.7

국산 콩으로 제조한 두부의 품질특성과 원료 콩과 두부에서의 oxalate와 phytate의 함량을 분석한 결과는 다음과 같다. 두부의 수율 및 수분함량은 각각 137.77~201.91% 및 74.42~80.01% 범위로 나타났으며, 색도는 검은색 외피를 갖고 있는 청자콩, 다원콩, 선흑콩 및 검정콩4호가 L값은 53.05~63.23, a값은 3.18~5.85 및 b값은 3.28~6.02로 다른 품종들에 비해 L값은 감소하였고 a값은 증가하였다. 두부의 hardness, cohesiveness, elasticity는 품종에 따라 각각 537.36~1696.05 g, 0.20~0.37 및 2.27~3.76으로 차이를 보였다. 두부의 calcium 함량은 0.586~1.488 ㎎/g 범위였으며, oxalate 함량은 0.01~0.40 mg/g 범위에서 검정콩4호로 조제된 두부가 가장 높은 함량을 나타내었고 phytate는 0.01~0.41 ㎎/g으로 다원콩으로 만든 두부가 가장 높은 함량을 나타내었다. 콩에서 두부로의 oxalate 및 phytate의 전이율은 각각 0.31~19.70 및 0.41~19.70%로 나타났다. 따라서 국산 장려콩을 이용하여 두부를 제조할 경우 phytate의 전이율이 높고 oxalate의 전이율이 낮은 한남콩, 다원콩 및 보광콩이 좋을 것으로 생각된다. This study was conducted to investigate the changes of mineral, oxalate and phytate during tofu processing with Korean recommended soybean cultivars. Fourteen cultivars were selected by distribution of calcium, oxalate and phytate contents. Tofu was manufactured and analyzed for quality characteristics, mineral, oxalate and phytate contents. The yield and moisture contents of tofu ranged from 137.77% in Anpyeongkong to 201.91% of Geomjeongkong 4, and 74.42 (Bongeuikong)~80.01% (Hojangkong), respectively. The lightness (L-value), redness (a-value) and yellowness (b-value) ranged from 53.05 (Dawonkong) to 86.16 (Jipumkong 2), -2.04~5.85, and from 3.28 in Geomjeongkong 4 to 16.17 of Cheongjakong, respectively. The hardness of tofu with selected soybean cultivar ranged from 537.36 g (Dongpuktae) to 1696.05 g (Jinpumkong 2). The highest calcium content was 1.488 ㎎/g in Dawonkong, oxalate and phytate in tofu were high at 0.40 ㎎/g in Geomjeongkong 4 and 0.41 ㎎/g in Dawonkong, respectively. The transfer ratios of oxalate and phytate from soybean to tofu were ranged from 0.31~19.70 and 0.41~19.70%, respectively.

자동차용 솔레노이드 밸브의 동특성을 위한 연성해석

김기찬(Kim, Ki-Chan) 한국산학기술학회 2014 한국산학기술학회논문지 Vol.15 No.6

본 논문에서는 자동차용 솔레노이드 밸브의 전자장 해석 기반의 동특성 해석 모델을 통하여 성능을 향상시키는 방법 을 제안한다. 종래의 솔레노이드 밸브의 요크와 플런저의 형상 최적설계를 통하여 저전류 고추력의 고성능 솔레노이드 모델 을 도출하였다. 동특성 해석을 수행하기 위해 솔레노이드 밸브의 입력 전류 패턴을 분석하고, 이를 통해 밸브의 개폐시 속도, 추력 정보를 해석하였다. 입력 전류 패턴을 출력하는 제어로직의 회로모델과 스프링 및 댐핑 등을 고려할 수 있는 솔레노이 드 밸브의 전자장 해석모델의 연동해석기반을 제안하여 입력전류 패턴의 변화가 밸브 동특성에 주는 영향을 분석할 수 있었 다. 마지막으로 종래모델과 최적모델의 동특성 해석을 통하여 최적설계 모델의 성능이 개선됨을 확인하였다. This paper proposes a methodology for developing the performance of a solenoid valve for vehicles based on the dynamic analysis model by an electromagnetic field. The high performance solenoid model with a low current and high thrust was induced through the shape optimal design of the yoke and plunger. To perform the dynamic analysis of the solenoid valve, the input current profile was analyzed. The speed and thrust information was analyzed by FEM with this current profile. The co-simulation method of the circuit model of control logic and electromagnetic model of the solenoid valve was also proposed to analyze the performance with several current patterns. Finally, the performance of the original model and optimal one was compared.

유한요소법을 이용한 자기부상용 선형유도기의 운전 특성 분석법

김기찬(Kim, Ki-Chan) 한국산학기술학회 2014 한국산학기술학회논문지 Vol.15 No.7

본 논문에서는 유한요소법을 사용하여 자기부상열차용 선형 유도 전동기의 효율적인 운전곡선 도출 방법을 제안한 다. 긴 시간의 동특성 해석을 위해 선형유도기 모델을 선형에서 회전형 타입으로 변환하고, 제어시 필요한 슬립 파라미터를 전자장 해석을 통하여 효과적으로 도출하였다. 견인용 선형유도전동기는 인버터에 의해 저속의 정토크 영역에서는 전압/주 파수 (V/f) 일정제어를 수행하고, 고속에서의 정출력 영역에서는 전압을 고정시키고 주파수를 증가시키면서 제어한다. 따라 서 논문에서는 정토크 및 정출력 영역의 운전 특성을 도출하기 위해 각 구간에서 일정한 스텝으로 슬립특성 곡선을 도출하고, 차량의 운전 상태에 따른 슬립 및 주파수를 특성곡선의 보간법에 의해 결정한다. 본 방법을 이용하면 차량의 임의의 부하상 태에 따라 최적의 운전 지령을 제시할 수 있다. This paper proposes a novel analysis method on the driving performance of LIM (linear induction motor) by FEM (finite element method). First, a linear model was converted with a rotation model to perform the dynamic analysis for a long time. Through the FEM model, the slip parameter for the control algorithm could be induced effectively. The LIM for the traction system was performed at a constant V/f in the region of constant torque, and a constant V and variable f in the region of constant power. Several slip characteristic curves according to the voltage and frequency were calculated by FEM in advance. The driving performance was then induced by interpolating the slip characteristic curves according to the load of the vehicle.

춘천 중도의 풍수지리 입지특성과 역사문화 형성에 관한 연구

김기찬 ( Kim Ki Chan ) 국제뇌교육종합대학원 국학연구원 2021 선도문화 Vol.30 No.-

Chuncheon Joogdo is a place where the energy of Taebaekjeonggan is concentrated and is located in a place where the landscape is harmonized with Vitality. Thousands of people have lived since prehistoric times, leaving world-class cultural heritages such as residences and graves of jiseok. The reason why history and culture have been able to be achieved for such a long time is that the location characteristics of Joogdo have been located in the feng shui site in the shape of the Womb and have been a good place for people to live. Prehistory and culture formed in Joogdo should be preserved as a world-class cultural heritage as well as Korea, and passed on to the future generations as the cradle of human culture.