• 산업공학
• /
• 제13권3호
• /
• pp.320-327
• /
• 2000

In this research report, we consider multi stage supply chain optimization modeling techniques, and propose a new integrated model. The stages that are normally associated with a supply chain include procurement, production and distribution. In general, there are two distinct set of approaches which manage whole supply chain. One approach is the plant decision and subsequently distribution and inventory decision while the second approach is to address all decisions simultaneously through the integrated model. First, we present a survey of existing models that are treated by independently. And then, we propose an integrated model that is in a moderate size and easy to implement in practice. Finally, we address possible solution methodologies and present some computational test results using CPLEX to see the computational burden from which new algorithmic insight might be come up.

• Journal of Electrical Engineering and Technology
• /
• 제10권6호
• /
• pp.2288-2296
• /
• 2015

This paper proposes a novel systematic modeling approach for an integrated single-stage power converter in order to predict its dynamic characteristics. The basic strategy of the proposed modeling is substituting the internal converters with an equivalent current source, and then deriving the dynamic equations under a standalone operation using the state-space averaging technique. The proposed approach provides an intuitive modeling solution and simplified mathematical process with accurate dynamic prediction. The simulation and experimental results by using an integrated boost-flyback converter prototype provide verification consistent with theoretical expectations.

• Mass Spectrometry Letters
• /
• 제6권3호
• /
• pp.80-84
• /
• 2015

Here, we demonstrate the use of MALDI-TOF as a fast and simple analytical approach to evaluate the DNA-binding capability of various peptides. Specifically, by varying the amino acid sequence of the peptides consisting of lysine (K) and tryptophan (W), we identified peptides with strong DNA-binding capabilities using MALDI-TOF. Mass spectrometric analysis reveals an interesting novel finding that lysine residues show sequence selective preference, which used to be considered as mediator of electrostatic interactions with DNA phosphate backbones. Moreover, tryptophan residues show higher affinity to DNA than lysine residues. Since there are numerous possible combinations to make peptide oligomers, it is valuable to introduce a simple and reliable analytical approach in order to quickly identify DNA-binding peptides.

• 대한산업공학회지
• /
• 제28권4호
• /
• pp.443-453
• /
• 2002

Many firms are trying to optimize their production and distribution systems separately, but possible profit increase by this approach is limited. Nowadays, it is more important to analyze these two systems simultaneously for the integrated supply chain management. This paper is a computational study to investigate the effectiveness of integrating production and distribution scheduling. We are interested in a multi-plant, multi-retailer, multi-product and multi-period industrial problem where the objective in solving production and distribution scheduling problem is to maximize the total net profit. Computational results on test problems of various sizes using the heuristic we developed show a substantial advantage of the integrated scheduling approach over the decoupled scheduling process. Sensitivity analysis on the parameter values indicates that, under the right conditions, the effectiveness of integrating production and distribution functions can be extremely high.

• 대한자원환경지질학회:학술대회논문집
• /
• 대한자원환경지질학회 2003년도 춘계 학술발표회 논문집
• /
• pp.27-31
• /
• 2003

During the past decade, integrated stratigraphy has been effectively applied to many sedimentary basins to analyze stratigraphic response to tectonic evolution. This application has been beneficial to hydrocarbon exploration in the basins because it provides a better understanding of temporal and spatial relationships of hydrocarbon source and reservoir rocks as a function of basin evolution. Like the maturation, migration, and trapping of hydrocarbons, ore-forming processes in hydrothermal deposits may be causally linked to particular phases of basin evolution. Consequently, applying integrated stratigraphy to mineral exploration may be a logical and helpful approach to understanding ore-forming processes and predicting their occurrence, location, and origin. (omitted)

• 산업경영시스템학회지
• /
• 제38권3호
• /
• pp.100-107
• /
• 2015

Recently as the manufacturers want competitiveness in dynamically changing environment, they are trying a lot of efforts to be efficient with their production systems, which may be achieved by diminishing unplanned operation stops. The operation stops and maintenance cost are known to be significantly decreased by adopting proper maintenance strategy. Therefore, the manufacturers were more getting interested in scheduling of exact maintenance scheduling to keep smooth operation and prevent unexpected stops. In this paper, we proposedan integrated maintenance approach in injection molding manufacturing line. It consists of predictive and preventive maintenance approach. The predictive maintenance uses the statistical process control technique with the real-time data and the preventive maintenance is based on the checking period of machine components or equipment. For the predictive maintenance approach, firstly, we identified components or equipment that are required maintenance, and then machine parameters that are related with the identified components or equipment. Second, we performed regression analysis to select the machine parameters that affect the quality of the manufactured products and are significant to the quality of the products. By this analysis, we can exclude the insignificant parameters from monitoring parameters and focus on the significant parameters. Third, we developed the statistical prediction models for the selected machine parameters. Current models include regression, exponential smoothing and so on. We used these models to decide abnormal patternand to schedule maintenance. Finally, for other components or equipment which is not covered by predictive approach, we adoptedpreventive maintenance approach. To show feasibility we developed an integrated maintenance support system in LabView Watchdog Agent and SQL Server environment and validated our proposed methodology with experimental data.

• 한국가정과교육학회지
• /
• 제22권3호
• /
• pp.163-188
• /
• 2010

이 연구는 일상의 문제를 통합적인 사고능력으로 풀 수 있는 새로운 교수 - 학습 방법의 하나로 주제중심 통합적 접근에 의한 가정교과 의생활 영역 교육 프로그램을 개발하고 평가하는데 목적을 두었다. 이를 위해 가정교과 의생활 영역의 주제를 선정하였고, 주제를 중심으로 통합적 접근을 시킨 교육 프로그램을 개발하고 개발된 프로그램을 평가하였다. 연구의 절차는 부산광역시 소재 B중학교 2학년 학생을 대상으로 총 28시간의 현장수업에 적용하여 평가하였다. 분석 단계에서 다른 교과의 통합적 접근에 관련된 프로그램을 탐색한 후, 설계 단계에서 프로그램의 유행을 파악하고, 개발 단계에서는 주제 선정 기준에 따라 주제를 선정을 하였다. 주제선정을 위해 선행연구와 기술 가정 교과서를 분석하였고, 학생들과의 메신저, 전문가 집단의 논의를 거쳐서 2개의 "의복관리"와 "섬유(재료)"를 선정하였다. 평가는 1차 전문가평가, 2차 예비 수업 평가, 3차 현장수업 평가를 하였다. 연구의 결과는 2개의 주제에 대해 주제중심 통합프로그램을 개발하였으며 "의복관리"편의 학습 자료는 총 49가지, "섬유(재료)"편의 핵습 자료는 총 32가지이며, 주제의 성격에 맞게 실험과 실습 등으로 구성하였다. 각 프로그램은 프로그램의 목표 학습내용 내용구조도 학습활동 평가로 이루어져 있고 학습활동은 체험 실습 및 실험활동 자기 주도적 활동 문제해결과정 등으로 구성되었으며, 평가는 자기평가 교사평가 동료평가 포트폴리오 실험보고서 등이 포함되었다. 1, 2차 평가에서 본 프로그램이 현 시점의 요구와 잘 부합되며, 타 교과와의 융합이 수업을 진행하는 데 적절하게 구성되어 있고, 학습자의 흥미도 지속적으로 유지할 수 있다고 평가하였다. 다만 프로그램의 내용 각 부분에 대해서 구체적인 설명이 필요하다고 요구하였다. 3차 학생 현장 수업평가에서 약 60%의 학생들이 개발된 프로그램이 재미있고, 내용을 이해하기 쉬우며, 한 가지 주제가 여러 과목과 관련이 있다는 사실을 알게 되었고 실제 생활에 적용 가능할 것이라고 하였다. 이상의 결과로서 주제중심 통합적 접근에 의한 가정교과 의생활 영역 교육 프로그램은 주제를 중심으로 통합적으로 접근을 시도했다는데 의의가 있다. 또한 학생들은 지식을 통합적으로 모으는 일 뿐 아니라 이를 창조적으로 변화시켜 실제 생활에서 직면하게 되는 여러 문제를 해결하는데 응용할 수 있었다. 이 연구를 많은 교사들이 활용하여 학생들이 실생활에서 접하는 문제를 통합적으로 사고하여 해결을 할 수 있기를 기대한다.

• Bulletin of the Korean Chemical Society
• /
• 제32권4호
• /
• pp.1170-1178
• /
• 2011

In the present study, the approach of high accuracy mass measurements for phospholipid identifications was evaluated using a 7 T ESI-FTMS/linear ion trap MS/MS. Experiments were carried out for porcine brain, bovine liver, and soybean total lipid extracts in both positive and negative ion modes. In total, 59, 55, and 18 phospholipid species were characterized in the positive ion mode for porcine brain, bovine liver, and soybean lipid extracts, respectively. Assigned lipid classes were PC, PE, PEt, PS, and SM. In the negative ion mode, PG, PS, PA, PE, and PI classes were observed. In the negative ion mode, for porcine brain, bovine liver, and soybean lipid extracts, 28, 34, and 29 species were characterized, respectively. Comparison of our results with those obtained by other groups using derivatization-LC-APCI MS and nano-RP-LC-MS/MS showed that our approach can characterize PC species as effectively as those methods could. In conclusion, we demonstrated that high accuracy mass measurements of total lipid extracts using a high resolution FTMS, particularly, 7T FTMS, plus ion-trap MS/MS are very useful in profiling lipid compositions in biological samples.

• 산업공학
• /
• 제13권3호
• /
• pp.388-395
• /
• 2000

In this paper, we propose an approach for integrated process planning and scheduling through analysis of the alternative operations sequences and machine selection in supply chain with multiple plants. It takes into account such factors alternative machine, alternative operations sequences, setup time, transportation time between plants, along with other manufacturing factors. The objective of the model is to minimize makespan of machine schedules for all parts, determines operations sequence for each part, and selects a machine for each operation simultaneously. Examples are presented to demonstrate the effectiveness of the proposed approach.

• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2006년도 춘계학술대회논문집
• /
• pp.348-357
• /
• 2006

Ground Vibration Tests (GVT) are needed on au new aircraft types and as part of certification. Its first objective is to verify models used for the calculation and prediction of the dynamic behavior of the structure. The main objectives of this paper are to introduce 'the integrated approach of dynamic testing for aerospace structure' in detail and 'The research projects in which LMS participated in aerospace structural dynamic area'