• Title/Summary/Keyword: What-if Analysis

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Seismic Performance Evaluation of Steel Moment Frames in Korea Using Nonlinear Dynamic Analysis (비선형동적해석을 통한 국내 철골 모멘트골조의 내진성능 평가)

  • Kim, Tae-Wan
    • Journal of the Earthquake Engineering Society of Korea
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    • v.16 no.4
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    • pp.1-8
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    • 2012
  • Domestic steel moment resisting frames were designed in accordance with the former KBC2005 and the current KBC2009, and then their seismic performance was evaluated in accordance with FEMA355F by utilizing nonlinear dynamic analysis. The results from the procedure in FEMA355F were different with those from the capacity spectrum method utilizing nonlinear static push-over analysis. In particular, the domestic steel moment resisting frames have a weak panel zone, so their behavior can be estimated more precisely by nonlinear dynamic analysis. The domestic steel moment resisting frames satisfied the performance goal if located at a site class $S_B$ or $S_C$, regardless of the story number and the response modification factor. However, if they are located at a site class $S_D$ or $S_E$, performance goal satisfaction cannot be guaranteed. No matter what standard is used for the design, KBC2005 or KBC2009, the domestic steel moment resisting frames may possess satisfactory seismic performance if the site condition is relatively good.

The Cadaver experience of the nursing students

  • Kim, Jung-ae;Eui-Young, Cho
    • International Journal of Advanced Culture Technology
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    • v.5 no.3
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    • pp.11-23
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    • 2017
  • Anatomy is one of the basic subjects of the nursing course, which is included in the curriculum of the nursing. Anatomy is a basic course for understanding major in nursing and it is the first gateway to acquire expertise. It is mainly opened in nursing and first to second grades. Therefore, students who have advanced to the nursing department have great interest and expectation on the anatomy subjects. In general, nursing students are studying anatomy with theories and models, and some universities practice on tour after dissection of medical consortium for short time. This is called the Cadaver practice. This study was carried out to investigate the thoughts and experiences of bioethics through nursing students' Cadaver practice. The interview data were processed through the analysis and interpretation process using the phenomenological research method, Giorgi method. As a result, 48 semantic units were derived, and then they were divided into 10 subcomponents and divided into 6 categories. As a result of the analysis, the experience of nursing students' bioethics was tied to the topic of six questions. For example, 'what about the respect and responsibility of nursing students in Cadaver?', 'What about your experience with the Cadaver experiment and bioethics?', 'What was the academic achievement of the actual human body structure viewing experience with cadaver?', 'What was the connection with theory?', 'What was your intention to recommend to others?', 'What was your perception and interest in the Cadaver experiment?'. Analyzes were integrated into 10 structures; "Thank you for your donation", "want others to refuse donation", "Burden of practice", "Good opportunities for learning", "Understand better", "Should study harder", "Memory is better", "Compared to theory", "Good experience", "Want to rejoin". The general structural description of the participants' meanings is summarized as follows. Nursing college students who participated in the Cadaver had a gratitude for the donor, but they said they would like to talk to others about donating organs. Before they went to practice, they felt a lot of pressure on the dissection of the cadaver, but they went to the practice and thought that it was a good opportunity to learn by doing well. Specifically, they understood that they had better understanding than the theoretical lesson, and that they were more eager to study their major through practice. In other words, most of them were more memorable and they would like to participate again if the opportunity comes next time. The results of this study show that the practice of Cadaver in nursing college students is very positive in terms of educational effectiveness. However, in terms of bioethics, it can be seen that the education process is somewhat unsatisfactory. Therefore, the systematic bioethics education should be prepared before the practice in the nursing college students' Cadaver practice.

Analyzing Product Reviews by Consumers using Natural Language Processing Techniques (자연어 처리 기법을 이용한 상품평 분석에 관한 연구)

  • Jeon, So-Eun;Lee, Young-Gu;Park, Kyeong-Cheol;Paik, Woo-Jin
    • 한국HCI학회:학술대회논문집
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    • 2009.02a
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    • pp.660-663
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    • 2009
  • Consumers express how they evaluate what they purchased by writing reviews especially when they purchased products online. By analyzing the reviews about a product, it will be possible to find out what the consumers liked and disliked about the product. It will be also possible to identify the general consensus on what matters in purchaing certain product type such as a laptop if many reviews about many instances of a particular product type is analyzed. However, it takes a lot of time to manually analyzing the reviews. Thus, we propose to use two natural language processing oriented computational techniques to analyze a large number of reviews. The techniques are text classification and information extraction. We developed an review analysis system and conducted experiments against the reviews about the laptop computers posted on the Naver information portal.

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Institutional Complementaries of Production and Welfare: Some Evidences from the Advanced Welfare Capitalist Countries (생산과 복지의 제도적 상보성에 관한 비교연구: 선진자본주의 국가를 중심으로)

  • Ahn, Sang-Hoon
    • Korean Journal of Social Welfare
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    • v.57 no.2
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    • pp.205-230
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    • 2005
  • This study empirically examines if there is a certain linkage between the production regimes and welfare systems; and if linked, how they are linked. It also investigates what the different regimes performed in terms of economic growth and redistribution. As a matter of fact, we have a series of studies that explores structural diversity of production and welfare. However, the existing studies are limited in that they consider only specific facets of the structure, although the structure of welfare capitalism should be studied as a comprehensive whole. This is the gap which this study tries to overcome. The study is composed of two major parts. The first one is the cluster analysis that examines if Esping-Andersen's notion about three different welfare regime and the thesis of diversity of capitalism can be dealt within a single research framework. The second is the ANOVA analysis investigating if variables of production and welfare are to be statistically different in the trichotomy framework. According to the result of the analyses, we can find at least two important evidences about institutional complementaries of production and welfare. First, Esping-Andersen's framework is useful to comprehensively deal with production as well as welfare. Secondly, there are statistically different regimes of production and welfare in the context of political economic and social policy variables. What is the most striking conclusion of the study is that there is no difference among the regimes in terms of the level of economic efficiency; while we can find a huge differences in terms of the level of welfare effectiveness. In conclusion, there is no substantive evidence to argue that welfare is innately antithesis of economic growth.

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Economics of Antagonistic Conflict Between Political Forces in Korea: Expansion (한국의 정치세력 간 적대적 갈등의 경제학: 확장)

  • Lee, Jongmin
    • Asia-Pacific Journal of Business
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    • v.11 no.3
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    • pp.217-227
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    • 2020
  • Purpose - Against the backdrop of the recent intense political conflict in Korea's political circles, it is to reveal from an economic point of view the hidden aspects behind the hostile conflict between the two political forces. Design/methodology/approach - This paper is not a normative study to find a solution to political conflict, but a positive study to reveal the mechanism of reciprocity that exists between the two parties of conflict in real politics. Therefore, the analysis is based on game theory methodology. Findings - It is shown that the ruling party should choose a level of preemptive response that is neither insufficient nor excessive if it aims to avoid radical anti-government struggles by opposition parties. We also find that even if the chances of success of the opposition's radical offensive struggle are low, the use of that strategy is not necessarily reduced. In addition, we have obtained comparative static results that do not deviate much from our intuition. What's interesting is that unlike our intuition that the choice of the method will be indifferent if the marginal effects of radical and normal methods of struggle are the same, the opposition party rather chooses the normal method of struggle more often. Research implications or Originality - In forming the analytical model, it reflected the support of the general public following the opposition's struggle against the ruling party in order to capture real politics well in the conflict between the two opposing parties.

A Decision Support System for the Operations of Vending Machine Supply Chains in a Green Logistics Environment (녹색물류 환경에서 자판기 공급사슬 운영을 위한 의사결정지원시스템의 개발)

  • Park, Yang-Byung;Yoon, Sung-Joon
    • IE interfaces
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    • v.25 no.3
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    • pp.338-346
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    • 2012
  • Regarding the green environment, it is important to boost the spread of environmentally friendly vending machines and to operate the vehicles for their inventory replenishments while minimizing emissions of greenhouse gases. In general, the vending machine management company lacks capability to operate the supply chain effectively in an integrated way under the dynamic, complex, and stochastic environment. This paper presents a decision support system, termed DSSVM, for the operations of the general and smart vending machine supply chains with stock-out-based, one stage item substitution in a green logistics environment. The DSSVM supports the estimation of item demand and substitution probabilities, determination of operation parameters, supply chain analysis, what-if analysis, and $CO_2$ analysis for which various analytical models are employed.

Stochastic Project Scheduling Simulation System (SPSS III)

  • Lee Dong-Eun
    • Korean Journal of Construction Engineering and Management
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    • v.6 no.1 s.23
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    • pp.73-79
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    • 2005
  • This paper, introduces a Stochastic Project Scheduling Simulation system (SPSS III) developed by the author to predict a project completion probability in a certain time. The system integrates deterministic CPM, probabilistic PERT, and stochastic Discrete Event Simulation (DES) scheduling methods into one system. It implements automated statistical analysis methods for computing the minimum number of simulation runs, the significance of the difference between independent simulations, and the confidence interval for the mean project duration as well as sensitivity analysis method in What-if analyzer component. The SPSS 111 gives the several benefits to researchers in that it (1) complements PERT and Monte Carlo simulation by using stochastic activity durations via a web based JAVA simulation over the Internet, (2) provides a way to model a project network having different probability distribution functions, (3) implements statistical analyses method which enable to produce a reliable prediction of the probability of completing a project in a specified time, and (4) allows researchers to compare the outcome of CPM, PERT and DES under different variability or skewness in the activity duration data.

Analysis of Economical Validity about Offshore Cage Culture for Cod (외해 가두리 대구 양식업 경제적 타당성 분석)

  • LEE, Kwang-Nam
    • Journal of Fisheries and Marine Sciences Education
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    • v.28 no.6
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    • pp.1724-1738
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    • 2016
  • This paper was researched on economic feasibility and sensibility of operation to offshore cage culture for cod. Offshore cage culture for cod needs to invest high budget what to construction and operation. And it was required variety methods about analysis of economic feasibility. Therefore, these were studied NPV, B/C and sensitivity for each by assuming a six scenarios considering the product performance according to the size of cod and culturing methods of fingerlings, etc. As a results, even though economy, if efficiency is low, it is a priority need the technical development to promote the feed efficiency to increase economic feasibility and should make efforts to enhance the business economy to strengthen the price competitiveness pricing with high quality products through quality control and brand recognition of cod. It expects to be used as a reference for related research in the future by deriving policy implications based on the method of analysis of the economic feasibility on offshore cage culture for cod.

Spatiotemporal Impact Assessments of Highway Construction: Autonomous SWAT Modeling

  • Choi, Kunhee;Bae, Junseo
    • International conference on construction engineering and project management
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    • 2015.10a
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    • pp.294-298
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    • 2015
  • In the United States, the completion of Construction Work Zone (CWZ) impact assessments for all federally-funded highway infrastructure improvement projects is mandated, yet it is regarded as a daunting task for state transportation agencies, due to a lack of standardized analytical methods for developing sounder Transportation Management Plans (TMPs). To circumvent these issues, this study aims to create a spatiotemporal modeling framework, dubbed "SWAT" (Spatiotemporal Work zone Assessment for TMPs). This study drew a total of 43,795 traffic sensor reading data collected from heavily trafficked highways in U.S. metropolitan areas. A multilevel-cluster-driven analysis characterized traffic patterns, while being verified using a measurement system analysis. An artificial neural networks model was created to predict potential 24/7 traffic demand automatically, and its predictive power was statistically validated. It is proposed that the predicted traffic patterns will be then incorporated into a what-if scenario analysis that evaluates the impact of numerous alternative construction plans. This study will yield a breakthrough in automating CWZ impact assessments with the first view of a systematic estimation method.

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A Case Study on the Team Conflict Phenomenon in IT Service Project (IT서비스 프로젝트에서의 팀 내 갈등현상에 관한 비교사례연구)

  • Park, Sang-Hee;Cho, Nam-Jae
    • Journal of Information Technology Applications and Management
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    • v.16 no.4
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    • pp.109-134
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    • 2009
  • Compared to research on the success of IT projects in general, research on the management of conflict in IT teams and its impact on project success is insufficient. This research performed a comparative study to analyze the nature and evolving phenomenon of conflicts in IT project teams. This study aimed at; First, Why a conflict is created within and around an IT project team. Second, What is the phenomenon of conflict evolution, diffusion, and/or resolution? Third, How the differences in conflict management style affects the IT project performance? Three propositions were drawn from the analysis of two intensive analysis of conflict cases and their comparison. Proposition 1 : Both 'the method of pointing out a problem' and 'the pointed-out contents' can be the trigger of conflicts around an IT project. Proposition 2 : While the focus of attention of one party is 'the method of pointing out a problem', if the other's and focus of attention of one party is 'the pointed-out contents', that is, if the focus of attention mismatch, the conflict can be amplified. Proposition 3 : According to the temporal nature of the relationship, e.g., short-term versus long-term, the way people approach and deal with the conflict differs.

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