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박상철,백권호 한국국제경영관리학회 2012 국제경영리뷰 Vol.16 No.2
이 사례는 한국 자동차산업에서 완성차업체와 부품업체간의 상호의존성에 바탕을 둔 한국적 동반성장의 모델 케이스로서 (주)화신의 지난 40여 년에 걸친 성장과 글로벌화 과정을 분석하는 데 목적을 두고 개발되었다. 여기서 동반성장이란 대기업과 중소기업 간의 상호의존성을 전제로 성립하는 상리공생적(symbiotic mutualism) 성장 과정과 메카니즘을 의미하는 것으로 이해할 수 있다. 화신의 주력 제품은 자동차 샤시류이다. 이 제품류는 첨단기술집약적이거나 고부가가치 품목은 아니라고 할 수도 있다. 하지만 개발기간이 상대적으로 길고, 조립업체와의 공동개발이 필수적이며, 자동차 모델 체인지에 따른 수시 설계 변경이 요구되는 등의 특성을 갖고 있다. 이러한 제품 특성이 화신의 대기업화 및 다국적화 과정에 한국적 동반성장의 틀을 배태시키는 하나의 요인이 되었을 것으로 생각한다. 화신의 성장에는 정 호 회장의 투철한 경영철학과 생산적 노사관계 확립, 기술개발과 품질혁신, 위기 관리 능력 등이 뒷받침되어 있다. 그렇다고는 하지만 화신이 인도, 중국, 미국, 브라질 등에 해외자회사를 설립하여 다국적기업으로 성장할 수 있었던 것은 현대자동차의 해외직접투자 방식이 피투자국 현지에도 한국과 유사한 경영생태계를 조성하는 선단(船團) 방식으로 전환된 데에 힘입은 바 크다. 화신이 대기업으로 성장하고 다국적화하게 되자 원청기업과의 상호의존성의 성격이 구조적으로 달라졌으며, 동반성장 메카니즘 자체에 대한 재검토를 해야 할 필요성이 제기되기에 이르렀다. 기본적으로 화신은 1.5차 벤더로서 원청기업과의 동반성장뿐만 아니라 2, 3차 벤더와의 동반성장을 촉진하면서 대외적으로 개방적이고 수평적인 경영생태계를 확충해 나가는 전략을 강구하지 않을 수 없을 것으로 보인다. 이를 위해 기존의 기술혁신 역량 위에 글로벌화 역량을 강화해야 하며, 이것이 동반성장의 한계를 극복하는 첩경이 될 것이다. This is the case of Hwashin Corp. for her history of growth & globalization of 40 years whose purpose is aimed at developing Korean model of win-win case in Korea's automotive industry based on the interdependence between automobile manufacturers and suppliers. What the win-win case of growth here means the process and mechanism also of growth between large and small businesses based on interdependency of symbiotic mutualism. The flagship products of Whashin is the kind of car chassis, which couldn't be said as value-added, technology-intensive high-tech items. However, these kind of products usually have some characteristic such as need relatively long period of development process, co-development with makers essential and requiring frequent design changes due to change of car models. This product characteristics of Whashin could be said to make it possible for her to become a model case of win-win growth with her customer of large firm during the process of her own internationalization. The leadership of Mr. Chung Ho, the chairman of Whashin Corp. such as has intelligible management philosophy with productive IR, R&D, innovative quality management and challenging risk management has been effect as focal one also. But the main factor to be able to explain the growth of Whashin into global by FDI to India, China, US and Brazil, could be indebted to the strategy of Hyundai Motor Company to localize to make fleet-like ecological system, which is very similar to the system in Korea. The need for reassessment of the win-win mechanism is now being suggested because the structural change of the interdependence of characteristics with the suppliers in accordance with the growth of Whashin into global. By default, Whashin should promote the win-win strategy with 2nd & 3rd tiered cooperative firms by building-up ecological system more open & horizontal one, not withstanding the win-win strategy as a 1.5 tiered vendor to Hyundai Motor. To this end, Whashin must develop herself the capability of globalization as well as the improvement of existing capability of technology innovation. It is the appropriate way to be imperative for Whashin by enhancing the capacity and overcoming limitations of existing win-win growth mechanism.
박상철,이경덕,변정우,김창화,백재우 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.11
Recently, The need for 'Stealthy Design' & 'Implementation of Silence Ship' is emphasized in warship design. The function of elastic mounts to minimize the structure-bone noise transmitted from principal noise sources is getting more important. For good performance of these elastic mounts, the impedance analysis required in ship`s foundation design should be considered as an important design factor. To improve the accuracy of finite element analysis for the dynamic stiffness, many studies on the factor affecting it have been conducted. However, additional research on the dynamic stiffness related to the installation environment(mount hole, bolt hole) is required. In this study, we investigated the change in impedance related to variation of the size of mount hole, and carried out the comparison of the analyzed and measured results before and after installing the mount hole of ship equipment's foundation.
용접부 피로강도를 고려한 굴삭기 붐 구조물 설계(II)
박상철,Park, Sang-Chul 대한용접접합학회 2011 대한용접접합학회지 Vol.29 No.4
The purpose of this study is to develop improved boom structures with reliable fatigue strength of weldment and lower production cost. For that purpose, multi-body dynamic analysis was performed to evaluate forces acting on arm & boom cylinders and joints of boom structure during operation of an excavator for three working postures, then stress analysis was made to investigate stress distribution around diaphragms at the bottom plate of boom structures which was known to be susceptible to fatigue failures of welded joints, and finally boom structures with optimum arrangement of diaphragms was proposed. This work mainly consists of the following two parts: part 1 focuses on multi-body dynamic analysis of excavators during operation and part 2 includes evaluations of fatigue strength of welded joints for modified boom structures.
돌발성 난청 환자에서 고실내 스테로이드 주입술 시기에 따른 청력 개선 효과
박상철,노경진,이용주,한수진,최현승 대한이비인후과학회 2013 대한이비인후-두경부외과학회지 Vol.56 No.1
Background and Objectives Oral systemic steroids are the most commonly accepted treatment for idiopathic sudden sensorineural hearing loss (SSNHL) despite pathophysiological uncertainty. Recently, intratympanic dexamethasone (ITD) has been proposed as an effective, alternative method for patients in whom oral steroids either fail to respond or are contraindicated. The authors compared the efficacy of ITD according to the duration of hearing loss prior to first dose of ITD. Subjects and Method We retrospectively reviewed the medical records and audiologic data of 86 SSNHL patients who received ITD from May 2009 to April 2012. Injections were repeated 5 times for 2 weeks and the favorable recovery was defined as complete or partial recovery using Siegel’s criteria. We compared the hearing outcomes between pre-ITD and post-ITD with respect to the duration of hearing loss. Results The mean pure-tone audiograms before and after ITD were 57.91±25.52 dB and 50.81±24.28 dB (p<0.01), respectively. According to Siegel’s criteria, the overall rate of hearing improvement after ITD was 22.1% (19/86). Favorable hearing recovery was observed in 8 of 18 (44.4%) patients within 10 days, 7 out of 41 (17.1%) between 10 days and 20 days, 2 of 18 (11.1%) between 20 days and 30 days, 2 of 7 (28.6%) over 30 days. Conclusion ITD is a useful method as primary or salvage treatment of SSNHL. The results of this study suggest that early ITD after hearing loss increase the probability of hearing recovery.
박상철,이용주,하종균,이자현 대한이비인후과학회 2013 대한이비인후-두경부외과학회지 Vol.56 No.9
Lemierre syndrome is characterized by a history of recent oropharyngeal infection, clinical or radiological evidence of internal jugular vein thrombosis, and isolation of pathogens, mainly Fusobacterium necrophorum. Septic emboli resulting from infected thrombophlebitis of the internal jugular vein leads to metastatic infections involving lung, liver, kidney, bone and central nervous system. Before the advent of antibiotics, the disease used to be common, incurring a high mortality rate. The disease is less frequently seen nowadays, but it is still a life-threatening disease, requiring a high index of suspicion and prompt treatment. We report a case of Lemierre syndrome, which showed oropharyngeal infection, and internal jugular vein thrombosis.