• 유통과학연구
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• 제17권10호
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• pp.115-123
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• 2019

Purpose - The purpose of paper is to examine into corporate value of international physical distribution, which is closely related with company that is running business based on competitive power. It is good for company to gain a competitiveness throughout activities from international physical distribution, then it increases corporate value after all. Then it will be looked at how international physical distribution can influence competitiveness of company in terms of corporate value. Research design, data, and methodology - The research method to be described is first to identify concept of international physical distribution theoretically, including characteristics and structure, and then to review corporate value of international physical distribution to make company be competitive. As far as general landscape of international logistics is concerned, it is investigated into function and role of service provider, user and market situations. However, it is well proved that current market of international physical distribution is stable and bright, which means it is possible to take foreseeable future as well. Then company can share with corporate value of international physical distribution provided from logistics service provider. Results - To achieve corporate value throughout process of international physical distribution is strongly connected with competitive status of logistics service providers, those are carriers and infrastructures, and third party logistics providers. Especially in order to inquire into competitive aspects of international physical distribution in this paper, it is focused on trade volumes and overcapacity of global shipping market. Unlike it is used to be, more optimistic and positive situation has been shown since 5 years ago from the year of 2018, which means carriers make a business well, leading company to be more competitive. Conclusions - Corporate value of company in terms of international physical distribution is closely involved with competitive situations in the physically distribution, especially shipping market, which service providers can paly a key role in this regards. It can be estimated that the more market of international physical distribution works, the more competitiveness of companies increases. Ocean carriers in shipping market of international physical distribution are doing actively business well, and the corporate value can be materialized in favor of company.

• 대한전기학회논문지:시스템및제어부문D
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• 제53권1호
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• pp.1-9
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• 2004

In this paper, we proposed a hardware(H/W) structure which can compress and recontruct the input image in real time operation and implemented it into a FPGA platform using VHDL(VHSIC Hardware Description Language). All the image processing element to process both compression and reconstruction in a FPGA were considered each of them was mapped into a H/W with the efficient structure for FPGA. We used the DWT(discrete wavelet transform) which transforms the data from spatial domain to the frequency domain, because use considered the motion JPEG2000 as the application. The implemented H/W is separated to both the data path part and the control part. The data path part consisted of the image processing blocks and the data processing blocks. The image processing blocks consisted of the DWT Kernel for the filtering by DWT, Quantizer/Huffman Encoder, Inverse Adder/Buffer for adding the low frequency coefficient to the high frequency one in the inverse DWT operation, and Huffman Decoder. Also there existed the interface blocks for communicating with the external application environments and the timing blocks for buffering between the internal blocks. The global operations of the designed H/W are the image compression and the reconstruction, and it is operated by the unit or a field synchronized with the A/D converter. The implemented H/W used the 54％(12943) LAB(Logic Array Block) and 9％(28352) ESB(Embedded System Block) in the APEX20KC EP20K600CB652-7 FPGA chip of ALTERA, and stably operated in the 70MHz clock frequency. So we verified the real time operation. that is. processing 60 fields/sec(30 frames/sec).

• 수산해양기술연구
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• 제29권1호
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• pp.39-55
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• 1993

Modal Analysis is the process of characterizing the dynamic properties of an elastic structure by identifying its modes of vibration. A mode of vibration is a global property of an elastic structure. That is, a mode has a specific natural frequency and damping factor which can be identified from response data at practically any point on a structure, and it has a characteristic mode shape which identifies the mode spatially over the entire structure. Modal testing is able to be performed on structural and mechanical structure in an effort to learn more about their elastic behavior. Once the dynamic properties of a structure are known its behavior can be predicted and therefore controlled or corrected. Resonant frequencies, damping factors and mode shape data can be used directly by a mechanical designer to pin point weak spots in a structure design, or this data can also be used to confirm or synthesize equations of motion for the elastic structure. These differential equations can be used to simulate structural response to know input forces and to examine the effects of pertubations in the distributed mass, stiffness and damping properties of the structure in more detail. In this paper the measurement of transfer functions in digital form, and the application of digital parameter identification techniques to identify modal parameters from the measured transfer function data are discussed. It is first shown that the transfer matrix, which is a complete dynamic model of an elastic plate structure can be written in terms of the structural modes of vibration. This special mathematical form allows one to identify the complete dynamics of the structure from a much reduced set of test data, and is the essence of the modal approach to identifying the dynamics of a structure. Finally, the application of transfer function models and identification techniques for obtaining modal parameters from the transfer function data are discussed. Characteristics on vibration response of elastic plate structure obtained from the dynamic analysis by Finite Element Method are compared with results of modal analysis.

• 디지털산업정보학회논문지
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• 제10권2호
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• pp.61-73
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• 2014

An automatic vehicle location tracing system is to build GIS server and on transmission for providing service in various ways by collecting a GPS location information from each vehicle. It is to save GPS data from OBU built-in on the vehicle and transmit the GPS data using the RSU on the roadside and WAVE communication technology. The collected data from the RSU is transmitted to the GIS server and stored in DB(database) and based on the GPS data that was collected from the each vehicle the system is to provide user service to suit the applications so it is to provide various services between RSU and OBU. In this paper, by implementing a multi-session process between the RM and the RMA a variety of services between RSU and OBU are provided. In addition, the system is designed and implemented using GPS to provide a variety of services, for the services provided from each RMA by configuring them as an independent session so it enables a variety of services implemented from one of RSU. With the result of the comparative analysis on the multi-session processing and single-session processing it shows that the differenes of them are minor in repect of the data loss rate and the data transfer rate but various services can be provided.

• 마케팅과학연구
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• 제8권
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• pp.291-313
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• 2001

본 연구는 서비스 실패와 회복에 관한 연구로서 그 동안 명확하게 정립되지 못한 실패와 회복에 관한 선행연구들을 검토하여 이를 체계적으로 정리하고, 실패 그리고 회복과 관련된 변수들과 이들 변수들간의 관계를 명확히 규명하여 보다 확고한 개념적인 틀을 제공하고자 한다. 이를 위해 본 연구는 서비스 실패의 통제성이 회복 만족에 영향을 미치고, 이들 변수 들은 서비스 회복 공정성에 의해 조절되어진다는 연구 과제를 설정하고 시나리오를 통한 유 사실험설계연구에 기초하여 분석한 결과 실패의 통제성은 회복 만족에 영향을 미치며, 실패의 통제성과 회복 만족간의 관계에 절차적 공정성, 상호관계적 공정성 그리고 분배적 공정성 모두는 상호작용 효과를 갖는 것으로 검정되었다.

• 대한원격탐사학회지
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• 제27권2호
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• pp.141-150
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• 2011

다중센서자료를 동시에 활용하기 위해서는 센서 간의 정밀한 기하보정이 요구된다. 이에 본 연구에서는 선형정보를 추출하여 고해상도의 광학영상과 SAR 영상 간의 기하보정을 수행하는 것을 목적으로 한다. 이를 위해 기준영상과 대상영상에 대하여 수동으로 매칭쌍을 추출하여 두 영상 간의 좌표체계를 개략적으로 일치시켜주는 과정을 전처리로 수행하였다. 방사적 특성이 다른 두 영상에 대하여 Canny edge operator를 통해 선형 화소를 추출한 뒤, 비용함수를 구성하여 유사하다고 생각되는 점을 초기 매칭쌍으로 선정하고, 그 중에서 이상치로 판단되는 오매칭쌍을 제거하고 남은 대상을 최종 매칭쌍으로 추출하였다. 본 기법을 통해 영상 전역에 걸쳐서 고르게 분포된 다수의 매칭쌍을 추출할 수 있었을 뿐만 아니라, 고도가 높거나 고도 변화가 큰 지역적 특성으로 인해 지리적 위치오차를 포함하는 지역에서 추출된 매칭쌍을 효과적으로 제거할 수 있었다. 최종적으로 추출된 매칭쌍을 이용하여 piecewise linear function과 affine transformation을 결합한 새로운 변환모델식을 적용하여 기하보정 정확도를 높이고자 하였고, 수동으로 추출된 검사점을 통해 1.58의 RMSE 값을 도출하였다.

• 한국국방경영분석학회지
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• 제32권2호
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• pp.78-91
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• 2006

글로벌 시장 환경에서 대량생산을 통해 규모의 경제를 실현하는 동시에 고객들의 다양한 요구사항을 충족시키기 위해 대량맞춤화가 경영혁신의 새로운 패러다임으로 자리를 잡아가고 있다. 또한 이러한 대량맞춤화를 실현하기 위해 제품 플랫폼으로부터 다양한 제품들을 이끌어 낼 수 있는 제품개발 방법들이 사용되고 있다. 이 방법들의 핵심 개념은 제품 플랫폼으로서 이러한 방법은 다품종 소량의 시장 환경에서 더욱 효과적이다. 본 연구에서는 그룹기법 개념을 이용하여 해군 함정의 플랫폼 군을 구성하는 방법을 제시하고, 이것을 쉽게 사용할 수 있도록 매트릭스 형태로 제안하였다. 또한 플랫폼 방식으로 해군 함정을 도입 시 비용효과가 있는지 분석하였고, 적용 가능한 요구조건 범위를 제시하였다. 이 연구는 함정 획득과정에서 비용절감과 기간 단축 등의 효과를 얻을 수 있을 것으로 기대된다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 춘계 학술발표회 초청강연 및 논문집
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• pp.972-978
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• 2008

Quality Assurance of Deep Mixing to fulfill the requirements of geotechnical design cannot be achieved only by the process control During production conducted by the deep mixing contractor but it should involve relevant activities that are carried out prior to, during and after the construction by all the parties involved in a deep mixing project. The requirement is different for different application, and hence, QA/QC method/procedure and verification technique may be different for different application. In order to maintain the high quality of deep mixing work in the global market, it is necessary to conduct a research project, such as investigation of illustrations, the variety of existing QA/QC methods/procedures, the correlation between the outcomes of different QA/QC methods. In these reason, it has been held the international meeting to discuss them, in that kind of activities in 2009 it will be held Symposium. Also Collaborative study for QA/QC is on goin, and conduction by all participated members. The subject for collaborative study are, task 1 : investigation of laboratory tests procedures, task 2 : comparing of different laboratory tests procedures, task 3 : QA/QC method/procedures, task 4 : integrated Task1 ~task 3. The discussion of the results in all task will be held in the Symposium separately. In this paper, it was presented four tasks. Also the results in task 1 and 2 conducting domestically until now, such as investigation of laboratory test procedures, effect on the unconfined compressive strength by aging temperature and by delayed time.

• 한국항해항만학회지
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• 제38권2호
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• pp.171-176
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• 2014

지속적인 유가 상승과 탄소배출 규제 강화는 기업들로 하여금 높은 경쟁력을 가지도록 요구한다. 따라서 고객 서비스 증대와 비용절감을 위해 효율적인 물류시스템을 구축하고 운영하는 것에 많은 노력을 기울이고 있으며 비용 경쟁력을 가지는 친환경 산업단지의 필요성이 증대되고 있는 실정이다. 부산시에서는 친환경정책을 통해 경쟁우위를 점하고 부족한 산업단지를 충족시키기 위해 서부산권에 '부산신항배후 국제산업물류도시'를 선정하고 개발을 진행하고 있다. 이러한 산업단지를 구축하기 위해서는 적절한 정책과 화물수송 공동화를 통한 물류시스템이 필요하다. 특히, 산업 단지내 물류시스템의 체계구축을 통한 효율적인 운영은 저비용 친환경적인 측면에서 매우 중요하다. 따라서 본 연구에서는 물류체계를 분석하고 분석내용을 바탕으로 물류네트워크 운영모델을 제시함으로서 산업단지의 기반을 마련하는데 목적이 있다.

• 한국융합학회논문지
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• 제10권12호
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• pp.293-298
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• 2019

전 세계 발전소용 온도 센서 시장은 약 350억 원대로 추정되며 우리나라는 이 중 95% 이상을 수입제품에 의존하고 있다. 본 연구는 발전소용 가스터빈 회전체의 온도 측정장치이며 국내 가동되는 100MW급 가스터빈 발전기의 약 800개 이상에 적용 가능하다. 본 연구는 측정부의 형태, 연결부 구조 및 소재 변경 등을 통해 내구성을 향상 시킨것으로 정밀화학공정 및 플랜트 수출 산업에서 사용되는 습도, 가스, 유압 등의 다른 측정장치에서도 적용 가능한 요소 기술이다. 본 연구의 성과로는 발전소용 가스터빈 회전축 온도 측정을 위한 센서 3종으로 설계된 온도 센서는 0℃ - 300℃ 범위에서 Class 1등급 온도 정밀도를 만족하였으며 융합연구를 통하여 기존의 유사 제품들과 비교하여 내구성을 크게 향상시켰다.