• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2000년도 춘계학술대회 논문집
• /
• pp.284-291
• /
• 2000

Interlocking software used in the electronic interlocking has been implemented through the structured approach until now. But there was the demerit that interlocking software has some problem in the standardization and the maintenance because of the limit in structured approach. Object-Oriented method overcoming this demerit was specified in the design step and the analysis step. There were object model, dynamic model and functional model in the analysis step and there were also two steps which were system design and object design in the design step. In this paper, Interlocking software was designed using Object-Oriented method to improve the standardization and the maintenance of the electronic interlocking. The electronic interlocking was analyzed with object modeling, dynamic modeling and functional modeling.

• 한국전자거래학회:학술대회논문집
• /
• 한국전자거래학회 1999년도 학술대회지 vol.1
• /
• pp.207-213
• /
• 1999

When function modeling with IDEF0 which is called as a standard methodology for CALS (FIPS 183), the initial work is to determine the purpose and viewpoint, and the next work is to generate a data list and an activity list. This work requires participant's discussion and agreements. The main problems for these working are a communication between participants and efficient discussion processing. Brainstorming is the most useful method for this work. The paper is for development for the modeling assistant tool to promote the business modeling. In this paper, we will introduce the tool which name is 'MindMapper' and 'Dyna-IDEF'. Mind-mapper is software for mind-map method that is used for creative thinking. Using this tool, we refine the result of the brainstorming about activity list and translate the result into the functional model of IDEF0 using Dyna-IDEF. The translated functional model is prototype model without ICOM arrows.

• 대한산업공학회지
• /
• 제14권2호
• /
• pp.63-70
• /
• 1988

Recently a new regime, called "back school" is advocated for the purpose of rapidly and economically returning a patient to full functional fitness and normal occupational activities. Assuming that this functional and vocational restoration is a goal of a regabilitation program, it is apparent that early recovery and higher success rate are major concern. In this study, a mixture model is developed and used to evaluate the recovery process of low back pain (LBP) patients in a rehabilitation program. The model provides (1) the probability of being recovered, and (2) the rate of recovery. Patients with gradual onset, with higher education, or of young age tend to show better prognosis.

• Asia Marketing Journal
• /
• 제26권3호
• /
• pp.170-185
• /
• 2024

This study employs a hierarchical component model to examine reuse intentions among experienced carsharing service users in South Korea, focusing on how various perceptions of benefits and risks impact their decisions. It also explores the influences of self-efficacy, gender, and service usage experience on these perceptions and reuse intentions. Findings highlight that male users are primarily driven by functional benefits such as accessibility and convenience, whereas female users are more responsive to hedonic benefits. Users with high self-efficacy prioritize economic benefits, whereas those with more usage experience prioritize functional benefits. Additionally, social risks significantly deter reuse intentions predominantly among male and less experienced users. By utilizing a hierarchical model, this study offers a deeper understanding of how each dimension of benefits and risks affect overall perceptions, facilitating tailored strategies for carsharing services. The insights contribute valuable theoretical and practical perspectives on the dynamics of carsharing service usage.

• 정신신체의학
• /
• 제20권2호
• /
• pp.135-138
• /
• 2012

기능성 위장관 장애(functional gastrointestinal disorder, FGID)의 생물학적 병태생리는 아직 명확하지 않은 실정이나 최근에 뇌-장관 축(brain-gut axis, BGA) 모델이 각광받고 있다. BGA 모델은 중추신경계(CNS)와 장관신경계(ENS)가 신경계, 신경내분비계, 신경면역계 등으로 밀접하게 연계되어 양방향성으로 항상성을 유지한다는 이론이다. 또한 BGA는 FGID에 대한 항우울제 효과의 이론적 근거를 제공한다. 저자들은 세로토닌 노르에프네프린 재흡수 차단제인 duloxetine이 목 이물감, 우울감을 보이는 환자와 상부 위장관 팽만감, 건강염려증적 불안을 보이는 환자에서 위장관 증상 및 정신의학적 증상에 효과적이었음을 경험하였다. 이에 두 증례보고를 통하여 BGA에 대해서 간략히 검토하고 duloxetine의 효과를 BGA의 측면에서 고찰하였다. 이 두 증례에서 duloxetine의 장관에서 뇌로의 영향(bottom-up regulation)으로는 세로토닌 수용체, 노르에피네프린 수용체 그리고 부신피질자극호르몬방출인자(CRF) 길항효과를 통해서 내장과민성(visceral hypersensitivity) 및 정신의학적 증상을 호전시키고, 뇌에서 장관으로의 영향(top-down regulation)으로는 우울과 불안을 호전시킴으로 위장관 증상에 영향을 미친 것으로 추정해 볼 수 있다.

• Nutrition Research and Practice
• /
• 제11권5호
• /
• pp.381-387
• /
• 2017

BACKGROUND/OBJECTIVES: Vascular dementia (VaD) caused by reduced blood supply to the brain manifests as white matter lesions accompanying demyelination and glial activation. We previously showed that arabinoxylan consisting of arabinose and xylose, and arabinose itself attenuated white matter injury in a rat model of VaD. Here, we investigated whether larch arabinogalactan (LAG) consisting of arabinose and galactose could also reduce white matter injury. MATERIALS/METHODS: We used a rat model of bilateral common carotid artery occlusion (BCCAO), in which the bilateral common carotid arteries were exposed and ligated permanently with silk sutures. The rats were fed a modified AIN-93G diet supplemented with LAG (100 mg/kg/day) for 5 days before and 4 weeks after being subjected to BCCAO. Four weeks after BCCAO, the pupillary light reflex (PLR) was measured to assess functional consequences of injury in the corpus callosum (cc). Additionally, Luxol fast blue staining and immunohistochemical staining were conducted to assess white matter injury, and astrocytic and microglial activation, respectively. RESULTS: We showed that white matter injury in the the cc and optic tract (opt) was attenuated in rats fed diet supplemented with LAG. Functional consequences of injury reduction in the opt manifested as improved PLR. Overall, these findings indicate that LAG intake protects against white matter injury through inhibition of glial activation. CONCLUSIONS: The results of this study support our hypothesis that cell wall polysaccharides consisting of arabinose are effective at protecting white matter injury, regardless of their origin. Moreover, LAG has the potential for development as a functional food to prevent vascular dementia.

• 한국전문물리치료학회지
• /
• 제23권4호
• /
• pp.71-80
• /
• 2016

Background: Functional capacity evaluations (FCEs) are designed to systematically assess the capacity to perform work-related tasks and to determine worker's ability to return to the previous job following work-related injuries. These evaluations may be rated either by clinician or worker. There has been a lack of consensus between the two scoring methods. Objects: This study aimed: 1) to confirm if the data are fit to the Rasch rating scale model and 2) to investigate the item-level concordance rate between the ratings of clinician and injured worker of the FCE. Methods: A cross-sectional study was conducted with a sample (n=124) of a rehabilitation program with the Occupational Rehabilitation Data Base for workers with low back pain. The functional capacity evaluation at admission and discharge was administered to clinicians and workers. The data were analyzed using both classical test theory-based Pearson's r and intra-class coefficient followed by item-level analysis with Rasch rating scale model. Results: All items of the FCE, except sitting items rated by clinician at admission and handling items rated by both clinician and worker throughout admission and discharge, were acceptable fit statistics with minor out of ranges for a misfit criterion. This may indicate that the items of the FCE overall fit to the Rasch rating scale model. Few problematic items responding differently to clinician and worker both at admission and discharge were detected with the differential item functioning analysis despite the excellent concordance rate using the two conventional statistics-sitting and handling items at admission and handling item at discharge. Conclusion: The item-level speculations using Rasch analysis of the FCE demonstrate that the ratings of clinician and self ratings of worker were psychometrically acceptable though there was an apparent discrepancy between the raters both at admission and discharge.

• 정보관리학회지
• /
• 제23권4호
• /
• pp.5-15
• /
• 2006

서지관계모형을 위한 개념적 모델인 IFLA의 FRBR (Functional Requirements for Bibliographic Records)에 대한 대안적인 접근이 발표되어 왔지만, FRBR 모델의 내부적인 일관성에 대해서는 많은 연구가 진행되어 있지 않은 실정이다. 본 연구는 FRBR 객체-관계 (entity-relationship) 모델에서 객체들 (entities)간의 관계(relationships) 에서 발생하는 상속 (inheritance) 속성과 관련된 모델의 내부적 모순점을 지적하며, 이러한 문제를 해결하기 위해 FRBR 모델의 표현성(expressiveness)을 강화하기 위한 여러 대안적인 방안을 논의한다.

• 항공우주기술
• /
• 제9권1호
• /
• pp.42-49
• /
• 2010

저정밀 태양센서는 인공위성의 자세제어에 필수적인 센서로서, 위성으로 입사되는 태양빛의 방향을 측정하거나 위성이 태양을 보지 못하는 상태에 있는지를 판단하기 위해서 사용되고 있다. 즉, 태양전지판의 모서리에 장착이 되어 있어서 4개의 저정밀 태양센서에서 측정되는 빛의 세기에 따라, 롤축과 요축의 자세 정보를 얻을 수 있으며, 태양전지판면에 1개의 저정밀 태양센서가 장착되어 있어서 태양 존재 여부를 확인할 수 있다. 본 논문에서는 저궤도 인공위성용 저정밀 태양센서의 개발 과정 및 결과를 보여준다. 태양센서의 개발은 제작완료 후, 환경시험 전과 후에 수행되는 기능 시험 결과를 분석하여 성능 만족여부를 결정하게 된다. 이러한 태양센서의 개발은 제작 특성상 공정의 명확성, 정밀성 그리고 많은 제작 경험을 필요로 한다. 그래서, 인증모델의 선행 개발을 통해서 공정의 정밀도를 높였으며, 그로인해 저정밀 태양센서 비행모델은 성능 요구 조건을 만족하는 결과를 얻을 수 있었다.

• 한국안전학회지
• /
• 제36권1호
• /
• pp.1-8
• /
• 2021

To simulate a process model in the field of chemical engineering, it is very important to identify the physical properties of novel materials as well as existing materials. However, it is difficult to measure the physical properties throughout a set of experiments due to the potential risk and cost. To address this, this study aims to develop a property prediction model based on the group contribution method for aromatic chemical compounds including benzene rings. The benzene rings of aromatic materials have a significant impact on their physical properties. To establish the prediction model, 42 important functional groups that determine the physical properties are considered, and the total numbers of functional groups on 147 aromatic chemical compounds are counted to prepare a dataset. Support vector regression is employed to prepare a prediction model to handle sparse and high-dimensional data. To verify the efficacy of this study, the results of this study are compared with those of previous studies. Despite the different datasets in the previous studies, the comparison indicated the enhanced performance in this study. Moreover, there are few reports on predicting the physical properties of aromatic compounds. This study can provide an effective method to estimate the physical properties of unknown chemical compounds and contribute toward reducing the experimental efforts for measuring physical properties.