• 제목/요약/키워드: Rash model

검색결과 10건 처리시간 0.185초

Improving the Performance of Market Surveillance (증권시장에서의 효과적인 주가감시모형)

  • 안철환
    • Journal of Korean Society for Quality Management
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    • 제28권1호
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    • pp.1-12
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    • 2000
  • Since Black Monday there has been a rash of systems developments which aimed at automating and upgrading the surveillance mechanism of monitoring the many facets of security trading. A more sophisticated mathematical model for detecting abnormal trading activities was created by Davis and Ord of Penn State along with Nobel prize laureates Solow and Modigliani of MIT. They used CAPM(Capital Asset Pricing Model) to explain the movements of stock price and applied an idea of residuals to detect unusual movements. In this paper, their idea is discussed and a new method is proposed, which involves a confidence interval of future observation in linear regression. One of the examples of the stock watch system adopting this statistical method is also presented.

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A Study of Prevention Management System Model and Fire Safety Diagnose for Cultural Heritages -Based on Traditional wooden structure in kyong gi-Do- (중요문화재의 소방안전 진단 및 예방관리 시스템 모델 연구 -경기도내 전통적인 목조건축물 중심으로-)

  • 정길흥
    • Journal of the Korean Professional Engineers Association
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    • 제32권6호
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    • pp.148-157
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    • 1999
  • As cultural Heritages are source of the national history and a life transition, their extinction is a fatal shock as result of cutoff the genealogy of the creative national spirit. So, we have necessarily to protect them, and to get the duty and the responsibility which the cultural inheritance hands over tnem to descendants with preserving and meaning safely at present time. In these days, the risk of fire in the Cultural Heritages building is increased because of rash changing environments from the indiscreet development of them. Accordingly, in order to get the original transmission of the Cultural Heritages, this paper involves being intensive the fire safety information of the Cultural Heritage in kyonggi-do province, analyzing their diagnoses, and studying a Fire Safety Prevention Management model to protect and to maintain them continuously. Therefore, it is to contribute from this approach to collecting fire safety information, analyzing diagnostic problems in fire accidents, and to manage the prevention method for protecting and maintaining the Cultural Heritages.

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Rasch Analysis of the Korean Western Ontario McMaster (KWOMAC): In the Out-Patients Over 65 Years With Osteoarthritis of the Knee (한국판 Western Ontario MacMaster(WOMAC)의 Rasch분석)

  • Koh, Eun-Kyung;Yi, Chung-Hwi
    • Physical Therapy Korea
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    • 제14권1호
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    • pp.82-89
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    • 2007
  • The Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) is a valid and widely used instrument for the assessment of osteoarthritis patients. In this study, data was obtained from the out-patients with painful osteoarthritis of the knee. One hundred-three out-patients were interviewed by physical therapists. In an exploratory way, a Korean version of the KWOMAC was analyzed for unidimensionality, item separation, and item difficulty using the Winsteps programs. Ninety-five patients with osteoarthritis of the knee over 65 years were analyzed for Rash analysis. In the analysis several functional items poorly fit to the model. These items included "heavy domestic duties" and "standing". In the pain domain, one item ("at night while in bed") did not fit the model. In the stiffness domain one item ("after sitting, lying, or resting later in the day") did not fit the model. Although 4 items from the 3 domains (pain, stiffness, function domain) do not fit well, the KWOMAC domains were confirmed by Rasch analysis. Thus the KWOMAC needs to be further examined before it can be used to properly determine the health status of the elderly with OA.

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Effects of Ascaris suum Extract and Sulfamethoxazole on Allergic Airway Inflammation

  • Cho, Eun-Sang;Park, Bae-Keun;Son, Hwa-Young
    • Biomolecules & Therapeutics
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    • 제19권4호
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    • pp.466-471
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    • 2011
  • Allergic asthma is complex inflammatory airway disorder caused by genetic and environmental factors. Sulfamethoxazole, a sulfonamide, is the cause of drug rash with eosinophilia and systemic symptoms syndrome. Parasites infection also related with eosinophilia and allergic diseases. In the present study, we investigated the modulating effects of parasitic derivative and sulfamethoxazole (SMX) on allergic airway inflammation in the ovalbumin (OVA)-induced murine asthma model. Histopathological changes, cytokine secretion, and total and allergen-specific IgE were investigated. BALB/c mice were treated with Ascaris suum extract or SMX for 4 weeks before sensitized and challenged to ovalbumin. Pre-treatment of Ascaris suum extract decreased allergic inflammation in lung tissue and IL-4, total IgE, and OVA-specific IgE levels in bronchoalveolar lavage fluid. However, pre-treatment of SMX did not show any effects on allergic airway inflammation. These results indicate that parasitic infection has protective effects on allergic asthma, but the sulfamamides may not relate with allergic asthma.

C]RASH ANALYSIS OF AUTO-BODY STRUCTURES CONSIDERING THE STRAIN-RATE HARDENING EFFECT

  • Kang, W.J.;Huh, H.
    • International Journal of Automotive Technology
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    • 제1권1호
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    • pp.35-41
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    • 2000
  • The crashworthiness of vehicles with finite element methods depends on the geometry modeling and the material properties. The vehicle body structures are generally composed of various members such as frames, stamped panels and deep-drawn parts from sheet metals. In order to ensure the impact characteristics of auto-body structures, the dynamic behavior of sheet metals must be examined to provide the appropriate constitutive relation. In this paper, high strain-rate tensile tests have been carried out with a tension type split Hopkinson bar apparatus specially designed for sheet metals. Experimental results from both static and dynamic tests with the tension split Hopkinson bar apparatus are interpolated to construct the Johnson-Cook and a modified Johnson-Cook equation as the constitutive relation, that should be applied to simulation of the dynamic behavior of auto-body structures. Simulation of auto-body structures has been carried out with an elasto-plastic finite element method with explicit time integration. The stress integration scheme with the plastic predictor-elastic corrector method is adopted in order to accurately keep track of the stress-strain relation for the rate-dependent model accurately. The crashworthiness of the structure with quasi-static constitutive relation is compared to the one with the rate-dependent constitutive model. Numerical simulation has been carried out for frontal frames and a hood of an automobile. Deformed shapes and the Impact energy absorption of the structure are investigated with the variation of the strain rate.

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Evaluation on Bankruptcy Prediction Model of Hospital using the comparative Analysis of Financial Index (재무지표 비교 분석에 의한 병원도산예측모형 평가)

  • Kim, Jae-Myeong;Ahn, Young-Chang
    • Health Policy and Management
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    • 제15권4호
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    • pp.81-109
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    • 2005
  • According to many recent studies suggesting that cash flow analysis method tends to be more effective than traditional financial index analysis method to predict corporate bankruptcy, this study applies the cash flow analysis method to hospital business to identify the significant variables which can distinguish between superior hospitals and bankruptcy hospitals. The author analyzed recent 3 years, i.e. from the year of 2000 to the year of 2002, financial statements of 31 bankrupt hospitals In 2003, and the same number of superior hospitals through using Multiple Discriminant Analysis and Logit Analysis. The results are belows; First, the study releases that Logit Analysis is more likely to be effective than Multiple Discriminant Analysis. Second, this research also shows that traditional financial index analysis method is more superior compare to cash flow analysis method for hospital bankruptcy predict model. Finally, this study suggest that the significant variables, which can distinguish superior hospitals from bankrupt hospitals, are Operating/Current Liabilities$(Y_2)$, CFO/Equity$(Y_5)$ for cash flow analysis method and Net Worth to Total Assets Ratio$(X_1)$, Quick Ratio $(X_3)$, Return on Assets$(X_6)$, Growth Rate of Patient Revenues$(X_{16})$ for traditional financial index analysis method.

The Coping Strategy of Korean Men in an International Marriage (국제결혼 한국인 남성의 결혼생활 대처전략에 관한 연구)

  • Choi, Woon-Sun;Hong, Gi-Sun
    • Journal of Families and Better Life
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    • 제30권6호
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    • pp.53-67
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    • 2012
  • This study was conducted to explore the coping strategy of Korean men in an international marriage. To achieve this purpose, we selected 4 Korean husbands who had married after seeking the services of matchmaking agencies, and we used snowball sampling. The data were collected through in-depth interviews, and analyzed according to the case study research method. It was found that the men considered international marriage to be their second choice instead of the best one. But they considered their marriage to be 'a prepared marriage', not 'a rash marriage.' 'The prepared marriage' allowed them to have realistic expectations, and to become 'tied in wedlock' with 'a good person.' The Korean husbands coped with difficulties and problems through flexible thinking, such as considering 'how the woman acts depends on the man', 'finding a model mentor couple', 'keeping an open mind to each other', 'reinforcing family ties', and 'developing their wife's independent capacity.' Based on the results, practical alternatives for Korean husbands were suggested. Lastly, the limitations of this study were mentioned.

Acute Health Effects of the Hebei Oil Spill on the Residents of Taean, Korea (허베이 스피리트호 유류유출사고 지역주민의 급성건강영향)

  • Lee, Cheol-Heon;Kang, Young-A;Chang, Kyu-Jin;Kim, Chang-Hoon;Hur, Jong-Il;Kim, Jae-Youn;Lee, Jong-Koo
    • Journal of Preventive Medicine and Public Health
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    • 제43권2호
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    • pp.166-173
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    • 2010
  • Objectives: On December 7, 2007, the Hebei Spirit oil tanker spilled out 12,547 kl of crude oil on the Yellow Sea 10 km away from the cost of Taean Province, Korea. As the coastline has been contaminated, local residents have been exposed to crude oil. Because the residents were showing many symptoms, we investigated the acute health effects of this oil spill on them. Methods: We conducted a cross-sectional study consisting of the heavy and moderately oil soaked area in Taean and the lightly oil soaked area in Seocheon. Ten seashore villages were selected from each area, and 10 male and female adults were selected from each village. We interviewed the subjects using a structured questionnaire on the characteristics of residents, the cleanup activities, the perception of oil hazard, depression and anxiety, and the physical symptoms. The odds ratios and 95% confidence intervals were analyzed using logistic regression analysis. The logistic regression model was adjusted for age, gender, education, smoking, the perception of oil hazard and anxiousness. Results: The more highly contaminated the area, the more likely it was for residents to be engaged in cleanup activities and have a greater chance of exposure to oil. The indexes of anxiety and depression were higher in the heavy and moderately oil soaked areas. The increased risks of headache, nausea, dizziness, fatigue, tingling of limb, hot flushing, sore throat, cough, runny nose, shortness of breath, itchy skin, rash, and sore eyes were significant. Conclusions: The results suggest that exposure to crude oil is associated with various acute physical symptoms. Long-term investigation is required to monitor the residents' health.

The Development of behavior Characteristics Scale in the Mathematically Giftedness of the Middle School (수학 영재를 위한 행동 특성 검사도구 개발)

  • Hwang, Dong-Jou
    • Journal of the Korean School Mathematics Society
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    • 제9권3호
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    • pp.405-424
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    • 2006
  • The purpose of this study was to develop the instruments which can measure behavior characteristics as a component of Mathematically Giftedness with in middle school period. This study prescribed the variable factors of measurement after classify the characteristics of Mathematically Giftedness through literature studies. And it produced instruments those are finally composed of 51 items through the preliminary test. The participants for the study were 424 Korean middle school students. Statistical analyses were carried out to verify the validities and reliability. Reliability(Cronbach $\alpha$) was in behavior characteristics, .95. Content validity was found to be satisfactory by internal validity evaluation on the test items. Internal validity were analyzed by BIGSTEPTS based on Rasch's 1-parameter item-response model. Construct validity was also found to be satisfactory through factor analysis which showed the four factors which the identification instruments were intended to measure such as, General mathematical mental ability, Mathematical Ability, Processing and Obtaining mathematical information Anility and Mathematical Disposition Ability. In conclusion, the instruments about behavior characteristics of Mathematically Giftedness during middle school period developed by this study are highly reliable on its reliability and validity.

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The Development and Validation of Learning Progression for Solar System Structure Using Multi-tiers Supply Form Items (다층 서답형 문항을 이용한 태양계 구조 학습 발달과정 개발 및 타당성 검증)

  • Oh, Hyunseok;Lee, Kiyoung
    • Journal of the Korean earth science society
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    • 제41권3호
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    • pp.291-306
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    • 2020
  • In this study, we developed a learning progression for the structure of the solar system using multi-tier supply form items and validated its appropriateness. To this end, by applying Wilson's (2005) construct modeling approach, we set up 'solar system components,' 'size and distance pattern of solar system planets,' and 'solar system modeling' as the progress variables of the learning progression and constructed multi-tier supply form items for each of these variables. The items were applied to 150 fifth graders before and after the classes that dealt with the 'solar system and star' unit. To describe the results of the assessment, the students' responses to each item were categorized into five levels. By analyzing the Wright map that was created by applying the partial credit Rasch model, we validated the appropriateness of the learning progression based on the students' responses. In addition, the validity of the hypothetical pathway that was established in the learning progression was verified by tracking changes in the developmental level of students before and after the classes. The results of the research are as follows. The bottom-up research method that used multi-tier supply form items was able to elaborately set the empirical learning progression for the conceptualization of the structure of the solar system that is taught in elementary school. In addition, the validity of the learning progression was high, and the development of students was found to change with the learning progression.