• Title/Summary/Keyword: 위험 그룹

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Performance Evaluation of Group Communication over WiBro Network in Shipbuilding Environment (조선산업환경에서의 WiBro 기반 그룹통신 성능 평가)

  • KIM, JaeMyoung;Oh, Moon Kyun
    • Annual Conference of KIPS
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    • 2009.11a
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    • pp.551-552
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    • 2009
  • 조선산업에서 선박의 건조 과정 중 탑재 공정은 작업자 간의 긴밀한 통신을 필요로 하며 매우 위험한 작업이다. 이러한 작업을 음성 품질이 매우 열악한 무전기나 호접속 지연이 많은 주파수 공용통신(TRS)를 이용하여 통신을 하고 있어 매우 위험하다. 따라서, 이러한 기존 통신방식을 대체하는 IP 기반 그룹통신 시스템과 이에 대한 품질 측정 및 평가가 필요하다. 본고에서는 IP 멀티미디어 시스템의 최초의 서비스인 PoC(PTT over Cellular) 서비스를 기반으로 조선산업에서 통합통신(Unified Communication)을 지향하기 위하여, 강재로 인한 매우 열악한 비가시 거리(NLOS)를 극복하고, 효율적인 통신 서비스를 제공하기 위한 엔터프라이즈 PoC을 기반으로 그룹통신의 품질을 측정하고 평가하였다. WiBro 기반 엔터프라이즈 PoC 서비스는 실제적으로 적용이 가능할 뿐 아니라, 실제의 작업자가 통신할때 지연이 느껴지지 않는 1초 이내의 그룹통신 지연시간에 대해 상기 서비스를 분석하였으며, 이론 상으로는 충분히 제공 가능함을 보이고 있다.

Effects of 6 Week Thoracic Flexibility Exercise on Balance, Gait Parameters and Fall Risk in Patients with Chronic Stroke; A randomized controlled study (6 주간의 체간 유연성 운동이 만성 뇌졸중 환자의 균형과 보행, 낙상 위험도에 미치는 영향)

  • Park, Donghwan;Lee, Kang-Seong
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.21 no.6
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    • pp.498-507
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    • 2020
  • The purpose of this study was to examine the effects of thoracic flexibility exercise on sitting balance, static standing balance, gait parameters, and the fall risk of patients with chronic stroke. The participants were randomized into the control (n=12) and thoracic flexibility exercise groups (n=12). Both groups received standard rehabilitation therapy for 30 minutes per session. The subjects in the experimental group performed additional thoracic flexibility exercises 3 times a week for 6 weeks. The trunk impairment scale, static standing balance, gait speed, cadence, and fall risk were assessed for all the participants before and after the intervention. The thoracic flexibility exercise group showed greater improvement than did the control group on the trunk impairment scale (t=-3.57, p=.002), static standing balance (t=5.37, p<.001), gait speed (t=-3.29, p=.003), cadence (t=-2.77, p=.011), and fall risk (t=6.33, p<.001). Furthermore, the thoracic flexibility exercise group significantly improved all the outcomes compared to the baseline values (P<.05). This study showed that the thoracic flexibility exercise improved the functional ability of patients with chronic stroke.

A Convergence Study on the relationship between Blood lipid and Periodontitis in Korean Men and Women - National Health and Nutrition Survey Data (한국인 남성과 여성의 혈중지질과 치주염의 연관성에 관한 융합적 고찰 - 국민건강영양조사자료)

  • Lee, Seyoung;Sim, Seon-ju
    • Journal of the Korea Convergence Society
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    • v.12 no.1
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    • pp.111-118
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    • 2021
  • This study used raw data from the 2016-2018 National Health and Nutrition Survey to study the correlation between blood lipid and periodontal disease in Korean men and women, and selected the final 11,797 people as subjects of analysis. A stratified analysis of smoking and residential areas was conducted to see the link between blood lipid and periodontal disease in Korean men. In men, non-smokers had a significant correlation of 1.38(95% CI:1.09-1.76), and in men, the risk group had a odds ratio of 1.49(95% CI:1.16-1.91), and in smokers, the risk group had odds ratio of 1.76 (95% CI:1.39-2.23) shows that the warning group is significant in relation to the intersecting ratio 1.14(95% CI:1.16-1.70) and the risk group 1.60(95% CI:1.32-1.94) periodontal disease. In conclusion, men's blood lipids and periodontal diseases are associated with smoking or residential areas, and are especially intended to be used as basic data in developing health education programs related to systemic and periodontal diseases for men in urban areas. In developing education programs for men in urban areas in the future, we want to use them as basic data.

The effect of high-carbohydrate diet and low-fat diet for the risk factors of metabolic syndrome in Korean adolescents: Using the Korean National Health and Nutrition Examination Surveys (KNHANES) 1998-2009 (우리나라 청소년의 고탄수화물 식사와 고지방 식사가 대사증후군 위험요인에 미치는 영향: 1998~2009년 국민건강영양조사 자료를 이용하여)

  • Han, Mi-Rhan;Lim, Jeong Hyun;Song, YoonJu
    • Journal of Nutrition and Health
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    • v.47 no.3
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    • pp.186-192
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    • 2014
  • Purpose: The prevalence of metabolic syndrome has increased in both the adult population and in adolescents. However, few studies have been conducted for adolescents. The aim of this study was to examine the association of metabolic syndrome and its risk factors with high carbohydrate diet and high fat diet using data from the Korea National Health and Nutrition Examination Survey (1998-2009). Methods: Using the Acceptable Macronutrient Distribution Range for Korean Dietary Reference Intakes, subjects whose energy intake from carbohydrate was greater than 70% and from fat was less than 15% were classified as the 'High-carbohydrate & low-fat diet (HCLF)' group and subjects whose energy intake from carbohydrate was less than 60% and from fat was 25% or more were classified as the 'Low-carbohydrate & high-fat Diet (LCHF)' group. Among 5,931 eligible subjects, HCLF included 853 subjects and LCHF included 1,084 subjects. Results: The mean age in both groups was 14 years and significant difference in age, BMI, sex, physical activity, and household income was observed between the HCLF and LCHF groups. Regarding the energy intake compared to Estimated Energy Requirement, the HCLF group met 79.0% and the LCHF group met 100.3%. Regarding nutrient intake per 1,000 kcal, carbohydrate, iron, potassium, and vitamin C intake in the HCLF group were significantly higher, but protein, fat, calcium, phosphorus, vitamin A, thiamin, riboflavin, and niacin intakes were significantly lower in the HCLF group compared to the LCHF group. After adjusting for age, sex, BMI, study year, household income, physical activity, and energy intake, the serum triglycerides level and systolic blood pressure were slightly higher, while the serum HDL-cholesterol level was significantly lower in HCLF than LCHF. The odds ratio of metabolic syndrome did not differ significantly between HCLF and LCHF. Conclusion: Our findings indicate an association of a high carbohydrate diet with increased risks for metabolic syndrome components. Conduct of future studies would be necessary in order to explore the underlying mechanism and to confirm our findings in a prospective study.

A management scheme of agent node in crowd group (군집 그룹에서 에이전트 노드 관리 방안)

  • Park, Sangjoon;Lee, Jongchan
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2021.10a
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    • pp.537-538
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    • 2021
  • In this paper, we consider the agent management scheme for the data gathering in the crowd group. To the critical data gathered in dangerous region, the possibility of mission failure caused by the sensor node damage can be high. Hence, we study the node processing to the danger agent node through the cooperative network method for the sensor nodes.

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Development of Selection Criteria of Small Scale Reservoirs for Emergency Action Plan(EAP) Establishment (소규모 저수지 비상대처계획(EAP) 수립 선정지표 개발)

  • Park, Ki-Chan;Choi, Kyung-Sook
    • Proceedings of the Korea Water Resources Association Conference
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    • 2019.05a
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    • pp.394-394
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    • 2019
  • 본 연구에서는 최근 기상이변의 영향 및 지진 발생과 저수지 노후화 등으로 지속적으로 발생되고 있는 소규모 저수지 붕괴에 의한 재해 위험성을 경감하고자 댐 저수지 EAP 수립 기준 이하 소규모 저수지를 대상으로 EAP 수립 대상여부를 판단할 선정지표를 개발하였다. 기존의 EAP 수립지침 검토, 과거 붕괴사례 분석, 관련분야 선행 연구 등을 분석하여 저수용량, 제체높이, 경과연수, 호우인자 및 지진인자를 포함하는 5개 선정지표를 정량화 하여 제시하므로 실무적용을 용이하게 하고자 하였다. 또한 개발된 선정지표는 EAP 수립 기준 이하 소규모 저수지에 적용하기에 앞서 각 선정 지표별 저수지 붕괴와의 연관성을 파악하기 위해 과거 저수지 붕괴사례에 단일지표 및 지표간 중첩도를 파악해 보았다. 그 결과, 지진인자, 호우인자, 지진 및 호우인자, 경과연수 지표순 순으로 저수지 붕괴와 높은 연관성을 나타내어, 소규모 저수지 붕괴에 연관되는 주요 지표를 지진인자, 호우인자, 경과연수로 선정하였다. 본 연구에서 선정된 지표간의 중첩정도를 파악하기 위해 과거 저수지 붕괴사례에 적용해 본 결과 호우인자+지진인자가 가장 높은 중첩도를 나타났다. 다음으로 본 연구를 통해 도출된 EAP 수립 대상 선정지표 중 주요 지표인 지진인자, 호우인자, 경과연수를 대상으로 2개의 지표가 중첩될 경우와 3개의 지표가 중첩될 경우를 EAP 수립 대상 관찰그룹과 검토그룹의 각각 분류한 후 이를 재해위험 저수지(MOIS, 2016)에 적용하여 보았다. 그 결과, EAP 수립 대상 관찰그룹에 속하는 경우가 38.5%를 차지하였고, 검토그룹에 속하는 경우가 11.9%를 차지하였다. EAP 수립 대상 관찰그룹에 해당하는 저수지에 대해서는 전문 시설관리자에 의한 주기적 점검 및 계측기 설치를 통한 모니터링 실시 등으로 세심한 시설물 관리가 필요할 것으로 판단되며, EAP 수립 대상 검토그룹에 해당하는 저수지에 대해서는 제체 하류부 구간의 주민 거주 현황, 경작지, 축사 등 재산 현황 및 EAP 수립에 소요되는 예산 등을 종합적으로 고려하여 저수지 관리기관에서 최종적으로 EAP 수립 여부를 결정하여 잠재적인 피해 발생을 사전에 저감시켜야 하겠다. 본 연구의 결과는 기존의 EAP 수립 기준의 보완책으로 활용 가능할 것으로 사료된다.

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Relationships Between Risk Factors and R&D Output: Approach to New Product Development process (위험요인과 R&D성과 간의 관계: 신제품개발단계별 접근)

  • Han, Sang Rog;Cho, Kuen Tae
    • Journal of Technology Innovation
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    • v.21 no.1
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    • pp.165-198
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    • 2013
  • The purpose of the study is to identify risk factors and analyze risk impacts to increase R&D outcome by taking into consideration the activities undertaken in each phase of New Product Development(NPD) process. The paper builds on survey research that has been developed new IT products within the past 5 years at SAMSUNG and LG subsidiaries in the Republic of Korea. This study identified risk factors in accordance with NPD process and evaluated the identified risk factors with survey questionnaires. To analyze the risk impacts were used to perform a logistic regression analysis based on R&D output. The impact of risk factors were higher for the low-output group. High-output group took a risk into consideration unique undertakings in project management and managed risk factors effectively in order to increase R&D output. Consequently, with the aim of improving output of R&D, a risk management is necessary to identify the risk factors for each phase of NPD and focus on managing risk factors with great effect.

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Evaluation of Obesity and Metabolic Syndrome Risk Factors in College Students (대학생의 비만 및 대사증후군 위험인자 평가)

  • Jung, Joo-Ha;Park, Jung-Jun;Choi, Jae-Hyun;Kim, Do-Yoen;Yang, Jum-Hong
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.12 no.8
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    • pp.3579-3586
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    • 2011
  • The purpose of this study was to evaluate the prevalence of the obesity and metabolic syndrome of the university students and to contribute to the development of the national health promotion through the comparative analysis on the risk factors of the metabolic syndrome by BMI level. The subjects for the study were 848(445 men and 403 women) college students. That is underweight group(18.5 kg/$m^2$ ${\leq}$ BMI, UWG) 28(6%) men, 86(21%) women, normal weight group(18.5 kg/$m^2$ < BMI < 23 kg/$m^2$, NWG) 218(49%) men, 250(62%) women, overweight group(23 kg/$m^2$ ${\leq}$ BMI < 25 kg/$m^2$, OWG) 117(26%) men, 42(11%) women, obesity group(25 kg/$m^2$ ${\leq}$ BMI, OG) 82(19%)man, 25(6%) women based on BMI standard of classification by WHO(2004). The conclusions were as follow. This result are necessary to evaluate the fitness of the university students. Because we can recognize and prevent the negative factor that could be produced during young adults we know the risk factors that could be chronic disease.

General and abdominal obesity and risk of cardiometabolic factors in the community dwelling women (순환대사위험요인의 관련성에서 비만지표인자인 허리둘레와 체질량지수의 비교)

  • Shin, Sohee;So, Wi-Young;Kim, Hyun Soo
    • Journal of the Korea Convergence Society
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    • v.9 no.1
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    • pp.233-240
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    • 2018
  • The aim of this study was to investigate the cardiometabolic risk factors (CRF) of community dwelling women based on a combination of body mass index (BMI) and waist circumference (WC). This cross-sectional study was based on 1,447 subjects between 30 and 60 years of age. Subjects were categorized into 4 groups by BMI and WC [group 1, BMI<$25kg/m^2$ and WC<85 cm; group 2, BMI<$25kg/m^2$ and WC>85 cm; group 3, BMI>$25kg/m^2$ and WC<85 cm; and group 4 (BMI>$25kg/m^2$ and WC>85 cm. Logistic regression analyses showed that subjects in group 2 had 1.75 times increased risk of clustering of 2 or more CRFs compared with subjects in group 1 (p<0.001). In conclusion, early detection of people with normal weight but high waist circumference may prevent them from getting worse by implementation of lifestyle intervention, consisting of regular exercise and healthy eating. In addition, further studies on appropriate exercise contents for them should be examined.

Cure Rate Model with Clustered Interval Censored Data (군집화된 구간 중도절단자료에 대한 치유율 모형의 적용)

  • Kim, Yang-Jin
    • The Korean Journal of Applied Statistics
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    • v.27 no.1
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    • pp.21-30
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    • 2014
  • Ordinary survival analysis cannot be applied when a significant fraction of patients may be cured. A cure rate model is the combination of cure fraction and survival model and can be applied to several types of cancer. In this article, the cure rate model is considered in the interval censored data with a cluster effect. A shared frailty model is introduced to characterize the cluster effect and an EM algorithm is used to estimate parameters. A simulation study is done to evaluate the performance of estimates. The proposed approach is applied to the smoking cessation study in which the event of interest is a smoking relapse. Several covariates (including intensive care) are evaluated to be effective for both the occurrence of relapse and the smoke quitting duration.