기업이미지와 경영성과에 대한 시장지향성의 영향: 중소 이노비즈와 비이노비즈 기업의 조절효과

정기한 ( Ki Han Chung ),정경효 ( Kyeong Hyo Jung ),신재익 ( Jae Ik Shin ) 한국생산성학회 2013 生産性論集 Vol.27 No.1

The purpose of this study is to investigate the relationship among market orientation, company image, and business performance of small manufacturing enterprises in Korea. The results show that information dissemination and information responsiveness of market orientation positively affect company image except information generation. Information dissemination positively affects business performance except information generation and information responsiveness. However, information responsiveness indirectly affects business performance. Company image positively affects business performance. The moderating effects of Inno-Biz firms between market orientation and business performance are not significant. Therefore, it is identified that the role of market orientation is very important to enhance company image and business performance of small manufacturing enterprises. For this, managers should make efforts to build effective market orientation as organizational culture to improve innovativeness, company image, and business performance.

Curcumin이 microglia의 활성화에 미치는 영향

정기경(Ki Kyung Jung),이상진(Sang Jin Lee),이선우(Sun Woo Yi),강석연(Seog Young Kang),김태균(Tae Gyun Kim),강주혜(Ju Hye Kang),홍성렬(Sung Youl Hong),주일로(Ilo Jou),김승희(Seung Hee Kim),한형미(Hyung Mee Han) 대한약학회 2000 약학회지 Vol.44 No.5

Microglia, brain resident macrophages, play a central role in the inflammatory responses of the brain and are activated in brain injuries and several neurodegenerative diseases such as Alzheimer's and Parkinson's disease, thereby aggravating the course of these diseases. In this study, the effects of plant-derived compounds such as curcumin or gingerol on the microglial activation were examined. Microglial cultures were prepared from 2-3 week mixed primary glial cultures obtained from the cerebral cortex of 1-2 day old rats and identified by immunocytochemistry using microglial-specific antibody OX-42. Microglia were activated by lipopolysaccharide (LPS) and interferon-gamma (IFN-gamma) and the effect of curcumin or 6-gingerol on the microglial activation was examined. Specific parameters measured to monitor microglial activation were nitric oxide (NO), prostaglandin E2 (PGE2) and tumor necrosis factor-alpha (TNF-alpha) release. Curcumin (1-10mcM) inhibited NO release induced by LPS and IFN-gamma in a dose-dependent manner whereas 6-gingerol (2-20mcM) did not have any effect on LPS/IFN-gamma-induced NO release. The levels of PGE2 and TNF-alpha induced by LPS and IFN-gamma were also inhibited by 1-10pM curcumin in a dose-dependent manner. These results showed that curcumin could modulate microglial activation.

1급 지적장애 환자에서 임플란트와 단일 구조 지르코니아를 이용한 완전구강회복 증례

정기원,김성훈,한중석,여인성,윤형인,Jeong, Ki-Won,Kim, Sung-Hun,Han, Jung-Suk,Yeo, In-Sung,Yoon, Hyung-In 대한치과보철학회 2017 대한치과보철학회지 Vol.55 No.2

1급 지적장애는 일상 생활과 사회 생활의 적응이 현저하게 곤란하여 일생 동안 타인의 보호가 필요한 사람으로 보통 불량한 구강환경을 가지며 치아 우식, 치근단 염증 및 다수의 치아 결손을 보여 적절한 보철적 회복을 필요로 한다. 다수의 치아가 결손된 지적장애 환자의 경우 가철성 보철물의 안정, 유지와 관리가 어렵기 때문에 고정성 보철이 필요하며 임플란트 치료가 유일한 방법이다. 본 증례는 1급 지적장애인 45세 남성환자로 불량한 구강환경으로 인해 대부분의 치아가 상실되어 저작기능 회복을 위해 내원하였으며 임플란트 및 생체친화적이고 강한 강도의 단일 구조 지르코니아를 이용한 고정성 보철물로 최종 수복하였다. 이상의 치료과정 결과 심미적, 기능적으로 만족할 만한 결과를 얻을 수 있었기에 보고하는 바이다. People with class I intellectual disability need lifelong assistance and protection from their surroundings due to impaired adaptive functioning. They have poor oral health and show higher prevalence of dental caries, periapical inflammation and tooth loss that require proper prosthetic restoration. Because removable prostheses for intellectually disabled patients often lack stability, retention, and maintenance, fixed prostheses are essential and the only available option is dental implants. In this case, a 45 year-old male patient with class I intellectual disability had poor oral hygiene with most of his teeth missing and visited the clinic to recover his masticatory function. Due to such systemic conditions, the definitive restoration of choice was the implant-supported fixed dental prosthesis made of biocompatible and highly strong monolithic zirconia. In consequence of the treatment process, the patient was able to improve his oral environment aesthetically and functionally.

귀환 전류 평면의 분할에 기인하는 복사 방출 영향의 효과적인 대책 방법

정기범(Ki-Bum Jung),전창한(Chang-Han Jun),정연춘(Yeon-Choon Chung) 한국전자파학회 2008 한국전자파학회논문지 Vol.19 No.3

일반적으로 고속의 디지털부와 아날로그부의 귀환 전류 평면(Return Current Plane: RCP)은 분할된다. 이것은 PCBs(Printed Circuit Boards)에서 각 서브 시스템 사이의 노이즈가 서로 간섭을 일으키지 않도록 하기 위해서 이루어지지만, 각 서브 시스템 사이에 연결된 신호선이 존재하는 경우 이러한 분할은 원치 않는 효과를 발생시킨다. EMI(Electromagnetic Interference) 측면에서 전자파의 복사 방출을 증가시키는 주된 요인이 된다. 이러한 전자파 복사 방출 노이즈를 저감시키기 위한 해결 방법으로 component bridge(저항 브릿지, 커패시터 브릿지, 페라이트 비드 브릿지: CB)가 사용되고 있지만, 아직 정확한 CB의 사용 지침이 부족한 실정이다. 본 논문에서는 EMI 측면에서 다중-CB 사용 방법에 대한 설계 원리를 측정을 통해 전자파 복사 방출을 분석하고, 노이즈 저감방법에 대한 설계 방법을 제시하고자 한다. 일반적으로 다중-CB 사이의 간격은 λ/20으로 페라이트 비드(ferrite bead)를 사용하도록 권장하고 있다. 본 논문은 CB의 다중 연결시 페라이트 비드와 칩 저항에 대한 설계 방법을 측정과 시뮬레이션을 통하여 증명하였고, 다중 연결된 칩 저항이 EMI 측면에서 분할된 RCP의 노이즈 저감에 더욱 더 효과적인 설계 방법임을 증명하였다. Generally a return current plane(RCP) of high speed digital and analog part is partitioned. This is achieved in order to decrease the noise interference between subsystem in PCBs(Printed Circuit Boards). However, when the connected signal line exists between each subsystem, this partition will cause unwanted effects. In a EMI(Electromagnetic Interference) point of view, the partition of the return current plane becomes a primary factor to increase the radiated emission. Component bridge(CB) is used for the way of maintaining radiated emission, still specific user's guide doesn't give sufficient principle. In a view point of EMI, design principle of multi-CB using method will be analyzed by measurement. And design principle of noise mitigation will be provided. Generally interval of multi-CB is λ/20 ferrite bead. In this study, When multi-CB connection is applied, design principle of ferrite bead and chip resistor is proved by measurement. Multi-connected chip resistance(0 Ω) is proved to be more effective design method in the point of EMI.

안검경련(眼瞼痙攣)을 중풍 전조증상이라 할 수 있는가?

정기용,고호연,정승민,하유군,주재홍,정희,최유경,김동우,한창호,고성규,조기호,박종형,전찬용,Jung, Ki-yong,Go, Ho-yeon,Jeong, Seung-min,Hsia, Yu-chun,Jew, Jae-hong,Jung, Hee,Choi, You-kyung,Kim, Dong-woo,Han, Chang-ho,Ko, Seung-gyu,Cho, Ki-ho 대한중풍순환신경학회 2006 대한중풍.순환신경학회지 Vol.7 No.1

Objectives : The purposes of this study were to investigate that a blepharospasm means the presymptom of stroke based on the traditional hypothesis in the oriental medicine and to compare a blepharospasm with warning signs of stroke in the western medicine. Methods : In the time period Oct. 2005 to Oct. 2006, 409 patients with a first-ever stroke admitted in the department of Internal Medicine of Kyungwon University In-cheon Oriental Medical Hospital, Kyunghee University Oriental Medical Hospital, Dongguk Il-san Oriental Medical Hospital were included. Patients were hospitalized within 14 days after the onset of stroke. Stroke patients were interviewed by residents who studied standard operation procedures in Fundamental Study for Standardization and Objectification of Differentiation and Pattern Identification of Syndrome of Oriental Medicine for Stroke. A questionnaire was completed by a question-and-answer form between patients and residents after explanation details to patients and the agreement of patients. Results : Age, care of patients or grandson, diabetes mellitus, and smoking were higher among cerebral infarction group, while smoking was higher among hemorrhage group. Female, young age, hyperlipidemia, hypertension in the family history and fat body in waist-hip ratio were higher among patients undergoing the blepharospasm before stroke onset. And the incidence of blepharospasm was lower in patients who dislike the fast food. Finally, when we compared a blepharospasm with warning signs of stroke in the western medicine, the incidence of blepharospasm in this study were the most frequent. Conclusion : In this study, the incidence of blepharospasm in patients before stroke onset was more frequent than that of warning signs in the western medicine. But more data from prospective cohort studies should be collected to be accepted that the blepharospasm is the presymptom of stroke as like warning signs in the western medicine.

2-step DPC를 이용한 이중루프 DLL기반의 광대역 클록 데이터 복원회로 설계

정기상(Ki-Sang Jung),김강직(Kang-Jik Kim),고귀한(Gui-han Ko),조성익(Seong-Ik Cho) 대한전기학회 2012 전기학회논문지 Vol.61 No.2

A recovered jitter of CDR(Clock and Data Recovery) Circuit based on Dual-loop DLL(Delay Locked Loop) for data recovery in high speed serial data communication is changed by depending on the input data and reference clock frequency. In this paper, 2-step DPC which has constant jitter performance for wide-range input frequency is proposed. The designed prototype 2-step CDR using proposed 2-step DPC has operation frequency between 200Mbps and 4Gbps. Average delay step of 2-step DPC is 10ps. Designed CDR circuit was tested with 0.18um CMOS process.

귀환 전류 평면의 분할에 기인하는 신호 무결성의 효과적인 대책 방법

정기범(Ki-Bum Jung),전창한(Chang-Han Jun),정연춘(Yeon-Choon Chung) 한국전자파학회 2008 한국전자파학회논문지 Vol.19 No.3

일반적으로 고속의 디지털부와 아날로그부의 귀환 전류 평면(Return Current Plane: RCP)은 분할된다. 이것은 PCBs(Printed Circuit Boards)에서 각 서브 시스템 사이의 노이즈가 서로 간섭을 일으키지 않도록 하기 위해 이루어지지만, 각 서브 시스템 사이에 연결된 신호선이 존재하는 경우, 이러한 분할은 원치 않는 효과를 발생시킨다. RCP의 분할은 회로적인 측면에서 신호 무결성(Signal Integrity)에 악영향을 미치고, EMI(Electromagnetic Interference) 측면에서 전자파의 복사 방출을 증가시키는 주된 요인이 된다. 이러한 신호 무결성을 유지하기 위한 방법으로 component bridge(저항 브릿지, 커패시터 브릿지, 페라이트 브릿지 등: CB)가 사용되고 있지만 아직 정확한 CB의 사용 지침이 부족한 실정이다. 본 논문에서는 신호 무결성 측면에서 다중-CB 사용 방법에 대한 설계 원리를 측정과 시뮬레이션을 통해 분석하고 노이즈 저감 방법에 대한 설계 방법을 제시하고자 한다. 일반적으로 CB 사이의 간격은 λ/20로 페라이트 비드(ferrite bead)를 사용하도록 권장하고 있다. 본 논문은 CB의 다중 연결시 페라이트 비드와 칩 저항에 대한 설계 방법을 측정과 시뮬레이션을 통하여 증명하였고, 다중 연결된 칩 저항(0Ω)이 신호 무결성 측면에서 더욱 더 효과적인 설계 방법임을 증명하였다. Generally a return current plane(RCP) of high speed digital and analog part is partitioned. This is achieved in order to decrease the noise interference between subsystem in PCBs(Printed Circuit Boards). However, when the connected signal line exists between each sub system, this partition will cause unwanted effects. In a circuital point of view, RCP partition has a bad influence upon signal integrity. In a EMI(Electromagnetic Interference) point of view, the partition of the return current plane becomes a primary factor to increase the radiated emission. Component bridge(CB) is used for the way of maintaining signal integrity, still specific user's guide doesn't give sufficient principle. In a view point of signal integrity, design principle of multi-CB using method will be analyzed by measurement and simulation. And design principle of noise mitigation will be provided. Generally interval of CB is λ/20 ferrite bead. In this study, When multi-CB connection is applied, design principle of ferrite bead and chip resistor is proved by measurement and simulation. Multi-connected chip resistance(0 Ω) is proved to be more effective design method in the point of signal integrity.

일정 열유속에서 엇갈림 마이크로 pin 핀 채널의 비등열전달

정기문(Ki Moon Jung),채종한(Zhong Han Chai),이희준(Hee Joon Lee) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.5

최소수리비용이 고장시간의 함수일 때 최적의 교체정책

정기문(Ki Mun Jung),한성실(Sung Sil Han) 한국자료분석학회 2004 Journal of the Korean Data Analysis Society Vol.6 No.6

본 논문에서는 보증기간이 종료된 이후에 발생하는 최소수리비용을 상수로 가정하였던 기존의 연구를 일반화하여 재생보증 또는 재생혼합보증이 있는 수리 가능한 시스템에 대하여 보증기간이 종료된 이후의 최소수리비용을 일반적인 시스템의 수명시간의 함수로 확장하여 보전정책을 고려한다. 최적의 교체정책을 설정하기 위해서 제안된 교체모형에 대하여 단위시간당 기대비용을 구하고, 이를 최소화하는 최적의 보전기간을 결정한다. 그리고, 시스템의 고장시간이 와이블 분포일 때 수치적 예를 통해서 제안된 최적의 교체정책을 설명한다. This paper considers a maintenance policy following the expiration of the renewing warranty. Most maintenance policy models with warranty period assume that the cost of minimal repair is constant regardless of its age at failure. However, such assumption might not hold true for real situations. Thus, we consider the maintenance policy with warranty period when minimal repair costs vary with time. The criterion used to determine the optimal maintenance policy is the expected cost rate per unit time from the user s perspective. Some numerical examples are presented for illustrative purpose.

기존치료법과 침도침 시술을 병행한 요추관협착증의 증례보고 및 분석

정기용(Ki Yong Jung),서영찬(Young Chan Sur),장우순(Woo Soon Jang),이지은(Ji Eun Lee),김경훈(Kyoung Hoon Kim),신광순(Gwang Soon Shin),한유식(You Sik Han) 한의병리학회 2012 동의생리병리학회지 Vol.26 No.1