• 제목/요약/키워드: conceptual data model

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Direct Horizontal-Flow Roughing Filtration의 조립 여상에서의 입자 제거 모델링 (Modeling of Particle Removal in the Coarse Media of Direct Horizontal-Flow Roughing Filtration)

  • 안효원;박노석;이선주;이경혁;왕창근
    • 상하수도학회지
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    • 제19권3호
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    • pp.338-347
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    • 2005
  • Horizontal-Flow Roughing Filtration (HRF) is one of altemative pretreatment methods e.g. prior to Slow Sand Filtration (SSF). However, some of its limitations are that the effluent quality drops drastically at higher turbidity (>200 NTU) and at higher filtration rate (>1 m/h). To overcome these drawbacks, we suggested Direct Horizontal-Flow Roughing Filtration (DHRF), which is a modified system of Horizontal-Flow Roughing (HRF) by addition of low dose of coagulant prior to filtration. In this study to optimize the DHRF configuration, a conceptual and mathematical model for the coarse compartment has been developed in analogy with multi-plate settlers. Data from simple column settling test can be used in the model to predict the filter performance. Furthermore, the model developed herein has been validated by successive experiments carried out. The conventional column settling test has been found to be an handy and useful to predict the performance of DHRF for different raw water characteristics (e.g. coagulated or uncoagulated water, different presence of organic matter, etc.) and different inital process conditions (e.g. coagulant dose, mixing time and intensity, etc.). An optimum filter design for the coarse compartment (grain size 20mm) has been found to be of 3 m/h filtration rate with filter length of 4-4.5 m.

유조선, COT Vent Pipe용 Anti-Splash Device 최적 모델 개발 (Oil Carrier, Development of on Optimized Anti-Splash Device Model for COT Vent Pipe)

  • 나옥균;전영수;박신길;김종호
    • 대한조선학회 특별논문집
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    • 대한조선학회 2015년도 특별논문집
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    • pp.50-55
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    • 2015
  • Application of newly conceptualized Anti-Splash Devices designed for COT vent pipes were studied on a P/V valve located on the upper deck of an oil carrier vessel. Anti-Splash devices are used in the shipbuilding industry in order to avoid oil overflow and spray accidents caused by excess pressure and vacuum condition in the cargo oil tanks. These conditions are caused by the transverse and longitudinal sloshing forces that arise from ship motion during sea voyages. The main issue with existing Anti-Splash device model is flux at the outlet of the Anti-Splash Device, and so, new conceptual models for the Anti-Splash device were developed and compared to existing Anti-Splash device model using CFD analysis. Transient analysis was used to capture the flow and velocity of each model and a comparative analysis was performed between old and new-concept models. This data was used to determine the optimal design parameters in order to develop an optimized Anti-Splash Device. A Factory acceptance test was performed on the new-concept models in order to verify the performance and efficiency against their design requirements and other criterion. The final step performed was to apply the optimized Anti-Splash Device models for COT vent pipes to an actual vessel and verify performance through a seawater cargo operation during a sea voyage as per the ship owner's request. The patent for the aforementioned device was obtained by the Korean Intellectual property Office dated Dec. 18th,2014.

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Research on Policy Measures to Activate Sports Welfare

  • KIM, Young Chul;KIM, Jun Su
    • Journal of Sport and Applied Science
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    • 제5권1호
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    • pp.17-26
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    • 2021
  • Purpose: The purpose of this study is to suggest the policy and scope of the concept of sports welfare and to present a systematic model enhancing sport welfare of the society. Research design, data, and methodology: In order to induce idea for welfare policy and conceptual sport welfare model, this study reviewed a literature discussing the functions and mechanism of sport in enhancing a sense of life quality and thus rebuilding welfare of community. Results: The study suggests these. First, sports welfare ensures the rights of sports of all citizens and has the main purpose of providing social services, creating environments against inequality, improving the quality of life and happiness for everyone to enjoy, and the range should be continued from the right to live, environments against inequality, to the improvement of life and happiness. Second, since the integrated perspective was first suggested, sports integration development will be researched as well as the direction of the development of policies of the integrated model. Basic research of indicator development will need to be proceeded to execute and evaluate the integrated model. Third, the improvement of treatment of sports welfare instructors is urgent. Namely, compared to sports-related budget and the enhancement of facilities, the poor environment of sports welfare instructors needs to be improved. Instead of only testing physical fitness and prescription, the business needs to be continued by connecting to the participants' continuous participation in sports. Conclusions: Whether sports welfare succeeds depends on the need for an active beneficiary, identification of demand, a beneficiary that can discover potential to join offline and online into one, the establishment of sports policies to promote competency development, and a direct progression is needed.

강직성 척추염 환자의 운동정도 예측모형 (A Prediction Model of Exercise Level in Patients with Ankylosing Spondylitis)

  • 김문자;이은남
    • 대한간호학회지
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    • 제52권2호
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    • pp.157-172
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    • 2022
  • Purpose: This study aimed to construct and test a hypothetical model to explain the predictive factors and causal pathways for exercise levels in patients with ankylosing spondylitis based on the self-determination theory. A conceptual framework was constructed assuming that autonomy support by health care providers would satisfy the three basic psychological needs of patients, which would increase their autonomous motivation for exercise, resulting in its initiation and continuation. Methods: This cross-sectional study included 221 patients with ankylosing spondylitis who were visiting rheumatology clinics in two tertiary hospitals. Health Care Climate Questionnaire-exercise regularly, Basic Psychological Needs Satisfaction scale, Behavior Regulation in Exercise Questionnaire-2, and exercise level were used to collect data. Results: The fitness of the hypothetical model met the recommended level (𝛘2/df ≤ 3, SRMR ≤ .08, RMSEA ≤ .08, GFI ≥ .90, AGFI ≥ .85, NFI ≥ .90, TLI ≥ .90, CFI ≥ .90). The model effect analysis revealed that autonomy support by health care providers had a positive effect on patients' autonomy, competence, relatedness, autonomous motivation, and exercise level. Competence and relatedness had positive effects on autonomous motivation and exercise level, respectively. Autonomous motivation had a positive effect on exercise level. Conclusion: The predictive factors of exercise level in patients with ankylosing spondylitis were autonomous motivation, health care providers' autonomy support, competence, and relatedness. Considering these factors, we recommend the development of an effective program for improving exercise levels in these patients.

Women's Empowerment Facilitates Complete Immunization in Indonesian Children: A Cross-sectional Study

  • Wirawan, Gede Benny Setia;Gustina, Ni Luh Zallila;Pramana, Putu Harrista Indra;Astiti, Made Yuliantari Dwi;Jonathan, Jovvita;Melinda, Fitriana;Wijaya, Teo
    • Journal of Preventive Medicine and Public Health
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    • 제55권2호
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    • pp.193-204
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    • 2022
  • Objectives: The primary objective of this study was to examine the effect of women's empowerment on the immunization of Indonesian children. The secondary objective was to examine the effect of wealth as a factor modifying this association. Methods: We utilized data from the 2017 Indonesian Demographic and Health Survey (IDHS). The subjects were married women with children aged 12-23 months (n=3532). Complete immunization was defined using the 2017 IDHS definition. Multiple components of women's empowerment were measured: enabling resources, decision-making involvement, and attitude toward intimate partner violence. The primary analysis was conducted using binomial logistic regression. Model 1 represented only the indicators of women's empowerment and model 2 controlled for socio-demographic variables. Subgroup analyses were conducted for each wealth group. Results: The primary analysis using model 1 identified several empowerment indicators that facilitated complete immunization. The analysis using model 2 found that maternal education and involvement in decision-making processes facilitated complete immunization in children. Subgroup analyses identified that wealth had a modifying effect. The indicators of women's empowerment were strong determinants of complete immunization in lower wealth quintiles but insignificant in middle-income and higher-income quintiles. Conclusions: To our knowledge, this study is the first to explore women's empowerment as a determinant of child immunization in Indonesia. The results indicate that women's empowerment must be considered in Indonesia's child immunization program. Women's empowerment was not found to be a determinant in higher wealth quintiles, which led us to rethink the conceptual framework of the effect of women's empowerment on health outcomes.

빅 데이터 분석을 활용한 콩 식품 중재가 대사증후군 위험요인에 미치는 영향 메타분석 (A Meta-Analysis of Influencing Soybean Food Interventions on the Metabolic Syndrome Risk Factors Utilizing Big Data)

  • 유옥경;차연수;진찬용;남수태
    • 한국정보통신학회:학술대회논문집
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    • 한국정보통신학회 2016년도 춘계학술대회
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    • pp.134-137
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    • 2016
  • 빅 데이터 분석은 기존 데이터베이스 관리 도구로부터 데이터를 수집, 저장, 관리, 분석할 수 있는 역량을 말한다. 또한, 대량의 정형 또는 비정형 데이터 집합으로부터 가치를 추출하고 결과를 분석하는 기술을 의미한다. 따라서 메타분석은 여러 실증연구의 정량적인 결과를 통합과 분석을 통해 전체 결과를 조망할 수 있는 기회를 제공하는 통계적 통합 방법이다. 또한 분석을 위한 분석이라고도 말한다. 우리나라 학술지에 게재된 대사증후군 위험요인에 콩 식품 중재에 관련된 연구들을 계량적으로 통합하고 검토해보기 위해 진행하였다. 본 연구는 대사증후군 위험요인에 대한 문헌적 고찰을 통해 선행연구를 살펴보고 열거된 요인에 관한 실증 분석된 연구들을 메타분석하기 위해 2000년-2016년 국내 학술지에 게재된 연구논문을 대상으로 하였다. 따라서 분석결과를 바탕으로 연구의 한계와 시사점을 제시하고자 한다.

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말기암환자 가족에 대한 호스피스 케어의 정보적 지지 제공 효과

  • 김현숙
    • 호스피스학술지
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    • 제2권1호
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    • pp.21-40
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    • 2002
  • Cancer is the second leading cause of the death in Korea. Family caregivers of dying patients manifest many psychological and physical symptoms of stress, and they often seek for informational support from health care providers. Unfortunately, however, few systematic studies identify the actual effect of such support on family caregivers. This study, thus, intends to evaluate the effect of informational support for hospice care. One group pretest-posttest design was used, employing the stress-coping model by Cohen and Wills as a conceptual framework. This research was conducted from July 1 to November 15, 1998, initially with 32 subjects sampled from hemato-oncology department of two general hospitals in Seoul, but reduced to 18 at the end due to the untimely death of patients or caregiver's refusal during the course of study. Informational supports were programmed to provide the family caregivers with 8 times of education and counseling as well as 24-hour hot-line for 4 weeks. A booklet that explains the various problems of hospice care was also prepared and distributed to all subjects. Data were collected by using self-report questionnaires and reviewing medical records. The tools used in this study were based on the Weinert's PRQ-II(scale of perceived social support), Spielberger's state anxiety inventory, and CES-D. Also included in the data collection were the general characteristics of family caregivers and patients, and the pain intensity and the performance status of patients. The data were analyzed with descriptive statistics, Wilcoxon sign rank test and paired t-test using SPSSWIN program. The results of the study were as follows: 1.The perceived social support of family caregivers was not significantly increased with informational support for hospice care(t=1.64, one tailed p=.060). 2.The anxiety of family caregivers was significantly reduced following informational support for hospice care(t=3.48, one tailed p=.002). 3.The depression of family caregivers was significantly reduced following informational support for hospice care(t=-2.18, one tailed=.022). 4.The pain intensity of patients with terminal cancer was significantly reduced following informational support for hospice care(t=-2.41, two tailed p=.027). The results suggest that the informational support provided to family caregivers of patients with terminal cancer reduced not only their anxiety and depression but also the pain intensity of patients. Further study is necessary to consolidate the conceptual framework of this study with expanded number of subjects. Nevertheless, it was certain that the informational support program for hospice care was very helpful to both caregivers and patients. Thus, the informational support program is strongly recommended for the hospitals which have no hospice unit yet.

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A Taxonomy of Workflow Architectures

  • Kim, Kwang-Hoon;Paik, Su-Ki
    • 한국데이타베이스학회:학술대회논문집
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    • 한국데이타베이스학회 1998년도 국제 컨퍼런스: 국가경쟁력 향상을 위한 디지틀도서관 구축방안
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    • pp.525-543
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    • 1998
  • This paper proposes a conceptual taxonomy of architectures far workflow management systems. The systematic classification work is based on a framework for workflow architectures. The framework, consisting of generic-level, conceptual-level and implementation-level architectures, provides common architectural principles for designing a workflow management system. We define the taxonomy by considering the possibilities for centralization or distribution of data, control, and execution. That is, we take into account three criteria. How are the major components of a workflow model and system, like activities, roles, actors, and workcases, concretized in workflow architecture? Which of the components is represented as software modules of the workflow architecture? And how are they configured and operating in the architecture? The workflow components might be embodied, as active (processes or threads) modules or as passive (data) modules, in the software architecture of a workflow management system. One or combinations of the components might become software modules in the software architecture. Finally, they might be centralized or distributed. The distribution of the components should be broken into three: Vertically, Horizontally and Fully distributed. Through the combination of these aspects, we can conceptually generate about 64 software Architectures for a workflow management system. That is, it should be possible to comprehend and characterize all kinds of software architectures for workflow management systems including the current existing systems as well as future systems. We believe that this taxonomy is a significant contribution because it adds clarity, completeness, and "global perspective" to workflow architectural discussions. The vocabulary suggested here includes workflow levels and aspects, allowing very different architectures to be discussed, compared, and contrasted. Added clarity is obtained because similar architectures from different vendors that used different terminology and techniques can now be seen to be identical at the higher level. Much of the complexity can be removed by thinking of workflow systems. Therefore, it is used to categorize existing workflow architectures and suggest a plethora of new workflow architectures. Finally, the taxonomy can be used for sorting out gems and stones amongst the architectures possibly generated. Thus, it might be a guideline not only for characterizing the existing workflow management systems, but also for solving the long-term and short-term architectural research issues, such as dynamic changes in workflow, transactional workflow, dynamically evolving workflow, large-scale workflow, etc., that have been proposed in the literature.

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A Taxonomy of Workflow Architectures

  • Kim, Kwang-Hoon;Paik, Su-Ki
    • 정보기술과데이타베이스저널
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    • 제5권1호
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    • pp.97-108
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    • 1998
  • This paper proposes a conceptual taxonomy of architectures for workflow management systems. The systematic classification work is based on a framework for workflow architectures. The framework, consisting of generic-level, conceptual-level and implementation-level architectures, provides common architectural principles for designing a workflow management system. We define the taxonomy by considering the possibilities for centralization or distribution of data, control, and execution. That is, we take into account three criteria. How are the major components of a workflow model and system, like activities, roles, actors, and workcases, concretized in workflow architecture. Which of the components is represented as software modules of the workflow architecture\ulcorner And how are they configured and operating in the architecture\ulcorner The workflow components might be embodied, as active (processes or threads) modules or as passive (data) modules, in the software architecture of a workflow management system. One or combinations of the components might become software modules in the software architecture. Finally, they might be centralized or distributed. The distribution of the components should be broken into three: Vertically, Horizontally and Fully distributed. Through the combination of these aspects, we can conceptually generate about 64 software Architectures for a workflow management system. That is, it should be possible to comprehend and characterize all kinds of software architectures for workflow management systems including the current existing systems as well as future systems. We believe that this taxonomy is a significant contribution because it adds clarity, completeness, and global perspective to workflow architectural discussions. The vocabulary suggested here includes workflow levels and aspects, allowing very different architectures to be discussed, compared, and contrasted. Added clarity is obtained because similar architectures from different vendors that used different terminology and techniques can now be seen to be identical at the higher level. Much of the complexity can be removed by thinking of workflow systems. Therefore, it is used to categorize existing workflow architectures and suggest a plethora of new workflow architectures. Finally, the taxonomy can be used for sorting out gems and stones amongst the architectures possibly generated. Thus, it might be a guideline not only for characterizing the existing workflow management systems, but also for solving the long-term and short-term architectural research issues, such as dynamic changes in workflow, transactional workflow, dynamically evolving workflow, large-scale workflow, etc., that have been proposed in the literature.

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성별, 쇼핑동기, 플로우 경험이 쇼핑행동에 미치는 영향 (Effects of gender, shopping motivation, flow experience on shopping behavior)

  • 최자영;이규혜
    • 디지털융복합연구
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    • 제10권5호
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    • pp.53-66
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    • 2012
  • 본 연구에서는 소비자들의 쇼핑행동 이해에 필요한 쇼핑 동기, 쇼핑 플로우 경험, 그리고 구매 간의 관계에서 구조적 관계를 파악하기 위해 이에 대한 인과구조 모형을 개발하여 그 모형에 대한 실증 분석을 하였다. 또한 쇼핑 동기는 성별의 차이가 크다는 여러 이론 및 연구를 바탕으로 성별이 쇼핑동기에 미치는 영향을 검증하였고, 성별과 쇼핑동기간에 차이가 나타났으며 5개의 쇼핑동기 중 제품획득 쇼핑동기를 제외한 기분전환, 아이디어 추구, 사회적 상호작용, 자아만족, 가치추구 쇼핑동기가 플로우 경험에 영향을 미치는 것으로 나타났다. 또한 플로우 경험이 높을수록 구매를 하는 것으로 나타났다. 특히 본 연구는 플로우의 선행변수로써 과거의 선행연구에서 강조하였던 모험심 및 능력이 아닌 동기가 쇼핑플로우 경험에 중요한 영향을 미친다는 시사점을 제공하고, 쇼핑 플로우가 구매 행동에 영향을 미친다는 점을 실증분석을 하였다는데 의의를 갖는다.