• 기술혁신연구
• /
• 제15권2호
• /
• pp.61-81
• /
• 2007

A typical small firm in consumer goods sectors of developing countries is an OEM supplier to big MNCs. Lacking design and marketing capability, a small firm relies on the MNCs for survival but their long term growth is not guaranteed as the MNCs are always looking for, and ready to relocate to, cheaper production sites. In this light, we can say that there is something like "OEM trap" from which most firms from LDCs find difficult to move out (Lee 2005). In this situation, one way for long term growth and catch-up is to make a transition to the OBM (own brand manufacturer). But, the transition is not easy or even risky. This paper analyzes the cases of three companies in Korea to find out common features in their successful transition to OBM. They are Aurora World (a flush toy maker), Hankook Chinaware (a chinaware maker), and Hanacobi (a plastic-made food container maker with the Lock-and-Lock brand). These firms can be commonly characterized by 1) arranging access to external knowledge base and steady increase of in-house R&D efforts and capabilities leading to acquisition of formal IPRs and their management, and 2) establishment of global production networks with factories in lower-income countries as well as their own independent global marketing network.

• 한국항해항만학회:학술대회논문집
• /
• 한국항해항만학회 2011년도 춘계학술대회
• /
• pp.227-228
• /
• 2011

이 연구는 기름 유출 사고 시 해상에서 실시되는 방제활동을 보다 신속하고 효과적으로 실시하기 위해 사고초기부터 오일붐의 필요량을 신속하고 간단하게 제시해주는 프로그램의 개발에 대하여 알아보려고 한다. 유출유의 기계적회수를 위해 유회수기, 임시저장탱크의 필요수량은 제시되었으나, 오일붐은 제시되지 못하고 있다. 본 연구에서는 해양선진국 및 국제해사기구(IMO)에서 제시한 오일붐의 필요수량에 대한 방법들을 활용해 프로그램에서 유출규모, 유막특징의 입력을 통해 오일붐의 최소 및 권고량이 제시되도록 NI(National Instuments)사(社)의 LabVIEW 2010버전으로 프로그래밍 되었다. 기름유출 시 OBM Program을 이용해 누구나 쉽게 오일붐 필요량을 파악할 수 있고, 신속하게 오일붐의 필요량이 파악되어 방제활동 대응시간을 단축시켜주며, 단축된 대응시간만큼 피해규모의 축소를 기대할 수 있다.

• 한국터널지하공간학회 논문집
• /
• 제10권2호
• /
• pp.185-191
• /
• 2008

본 연구에서는 정밀한 초시설정이 가능한 전자뇌관을 이용하여 터널에서의 다단 시차 분할발파(OBM)를 실시하며 대형 대단면 지하 공간 창출 요구에 발맞추어 기존뇌관(비전기뇌관)과의 비교를 통해 진동 소음 저감효과와 시공성, 효율성을 비교 검토하자 하였다. 본 연구를 통해 전자뇌관 적용 시 진동 소음 제어 및 비산거리, 여굴량, 파쇄입도가 비전기뇌관가 비교하여 양호한 결과를 나타냄을 확인할 수 있었다.

• 대한화약발파공학회:학술대회논문집
• /
• 대한화약발파공학회 2007년도 춘계학술발표회 논문집
• /
• pp.127-134
• /
• 2007

• 대한화약발파공학회:학술대회논문집
• /
• 대한화약발파공학회 2007년도 춘계학술발표회 논문집
• /
• pp.43-50
• /
• 2007

• 제어로봇시스템학회논문지
• /
• 제17권11호
• /
• pp.1095-1100
• /
• 2011

In this paper, PHM (Prognostics and Health Management) techniques are briefly outlined. Prognostics, being a central step within the PHM, is explained in more detail, stating that there are three approaches - experience based, data-driven and model based approaches. Representative articles in the field of prognostics are also given in terms of the type of faults. Model based method is illustrated by introducing a case study that was conducted to the crack growth of the gear plate in UH-60A helicopter. The paper also addresses the comparison of the OBM (Overall Bayesian Method), which was developed by the authors with the PF (Particle Filtering) method, which draws great attention recently in prognostics, through the study on a simple crack growth problem. Their performances are examined by evaluating the metrics introduced by PHM society.

• 기술혁신연구
• /
• 제13권2호
• /
• pp.97-131
• /
• 2005

This paper has discussed several issues regarding the barriers and opportunities for technological catch-up by the late-comer countries and firms. As one of the barriers to technological catch-up, the paper emphasizes the uncertainty involved with the third stage of learning how to design. The barriers arise because as the forerunner firms refuse to sell or give license to successful catching-up firms who thus have to design the product by themselves. The paper discusses how to overcome this barrier. It also notes that if the crisis of design technology is a push factor for leapfrogging, arrival of new techno-economic paradigm can serve as a pull factor for leapfrogging, serving as a winder of opportunity. The, it emphasized the two risks with leapfrogging, namely the risk of choosing right technology or standards and the risk of creating initial markets, and how to overcome these risks. It discusses how to overcome these risks in leapfrogging, and differentiates diverse forms of knowledge accesses. Then, the paper takes up the issue of whether there can be a single common or several models for catch-up. A common element of catching-up is to enter new markets segments quickly, to manufacture with high levels of engineering excellence, and to be first-to-market by means of the best integrative designs. This observation is supported by the fact that Korea and Taiwan has achieved higher levels of technological capabilities in such sectors as featured by short cycle time of technology. The possibility of two alternative models for catch-up is also discussed in terms of the key difference between Korean and Taiwan, especially in the position toward the source of foreign knowledge and the paths taken toward the final goal of OBM. Taiwan followed the sequential steps of OEM, ODM and OBN, in collaboration or integration with the MNCs. Korean chaebols jumped from OEM directly to OBM even without consolidating design technology.

• 화약ㆍ발파
• /
• 제26권1호
• /
• pp.39-48
• /
• 2008

그 동안 우리나라와 같이 터널 및 노천 발파 현장 근거리에 보안물건이 위치해 있어 진동제어가 절실히 필요한 상황에서 진동제어에 효과가 있는 것으로 알려진 전자뇌관을 이용하여 불쾌감을 주던 발파음을 쾌적한 발파음으로 전환하고자 연주식발파공법(Orchestra blasting method, OBM)개발에 대한 연구가 진행되어왔으며, 본 연구에서는 리듬감구현에 중점을 두고 실험을 실시하였다. 우선 단발발파를 실시하여 독립파형을 획득, 누적 파형합성프로그램(Program blasting wave, PBW)을 이용하여 분석한 결과 실험 현장의 최적지연초시는 34ms를 나타내었고, 50ms이상에서는 수렴하는 경향을 보였다. 또 리듬감 구현에 필요한 지연시차를 선택한 음악의 실제 연주 시간을 분석하여 결정하였고, 그 결과 실제 연주 시간에 맞춰 기폭된 발파음은 큰 북으로 연주하는 듯한 느낌을 주는 쾌적한 발파음으로 전환시킬 수 있었다.

• Natural Product Sciences
• /
• 제20권4호
• /
• pp.281-284
• /
• 2014

In this study, twenty-one oleanane-type triterpenoid saponins were isolated from a methanol extract of the roots of Pulsatilla koreana. Antagonistic activities were measured in these compounds by the aequorin based cellular functional assay system for the corticotropin releasing factor receptor (CRF1). Of them, compounds 7 - 10 showed the highest degree of CRF1 inhibition further at the concentration of $10{\mu}M$. Moreover, by the analysis based on the structure-activity relationship of isolated saponins, a sugar chain at C-3 and a carboxyl group at C-28, as well as a methyl group at C-23 seems to be key functional elements. To our knowledge, this is the first report on CRF1 inhibition of saponins from P. koreana.

• 화약ㆍ발파
• /
• 제27권1호
• /
• pp.38-46
• /
• 2009

최근 진동 소음을 저감하는 공법으로 초시의 정확성과 초시부여의 자율성을 가진 전자뇌관을 이용하는 공법(OBM ; Orechestra Blasting)이 소개되었다. 파형합성프로그램은 전자뇌관의 지연초시를 결정할 수 있으며 결정된 초시를 이용하여 실 발파와 유사한 환경에서의 시뮬레이션을 수행, 최적초시 상태의 진동 속도를 예측할 수 있다. 본 연구에서는 파형합성프로그램을 통해 진동을 제어하는 최적초시를 얻고 실제 발파작업 시의 진동치를 예측하고자 하였다.