• Title/Summary/Keyword: Protective Behavior

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Changes in Urinary MDA and 8-OHdG Concentrations due to Wearing Personal Protective Equipment and Performing Protective Behaviors among Agricultural Workers in Korea (우리나라 일부 농업 종사자의 개인보호구 착용, 작업위생행위에 따른 소변 중 MDA, 8-OHdG 농도 변화)

  • Lee, Jiyun;Ji, Kyunghee;Kim, Bokyung;Park, Seokhwan;Kim, Pan-Gyi
    • Journal of Environmental Health Sciences
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    • v.43 no.6
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    • pp.467-477
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    • 2017
  • Objectives: Oxidative stress and DNA damage have been proposed as mechanisms linking pesticide exposure to health effects such as cancer and neurological diseases. We investigated whether protective measures could significantly reduce the levels of biomarkers for oxidative stress and DNA damage in agricultural workers. Methods: In the present study, the levels of malondialdehyde (MDA) and 8-hydroxy-2'-deoxyguanosine (8-OHdG), biomarkers related to oxidative stress and DNA damage, respectively, were analyzed in urine samples collected from agricultural workers in two provinces of Korea (n=60). The influence of wearing personal protective equipment (PPE) and performing protective behaviors on the levels of these two biomarkers was also evaluated. Results: The median urinary levels of MDA and 8-OHdG were 10.45 nmol/mg creatinine and 14.42 ng/mg creatinine in subjects living in region A, while they were 6.25 nmol/mg creatinine and 24.77 ng/mg creatinine in subjects living in region B, respectively. The levels of MDA and 8-OHdG were higher in male farmers. Farmers wearing greater numbers of PPE and performing more protective behaviors had significantly lower levels of MDA. Greater numbers of protective behaviors was significantly associated with lower levels of 8-OHdG. Conclusion: The results of the present study indicate that pesticide exposure could induce oxidative stress and DNA damage in agricultural workers, and that protective measures are important for mitigating pesticide exposure.

Corrosion of AI-Fe Coatings for Wet-Seal Area in Molten Carbonate Fuel Cells

  • Jun, JaeHo;Jun, JoongHwan;Kim, KyooYoung
    • Corrosion Science and Technology
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    • v.3 no.3
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    • pp.98-101
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    • 2004
  • The corrosion behavior of Al-Fe coatings was studied in the wet-seal atmosphere of molten carbonate fuel cells (MCFC). Fe-8Al, Fe-16Al, Fe-25Al, Fe-36Al, and Fe-70Al (in at.%) specimens were tested in Li/K carbonate at $650^{\circ}C$ by a single cell test and an immersion test. In general, the corrosion resistance of the Al-Fe coatings was enhanced due to the formation of a protective $LiAlO_2$ layer. However, when the Al-Fe coatings didn't have sufficient content of aluminum enough for maintaining the protective layer, the corrosion resistance of the Al-Fe coatings was severely degraded by the growth of non-protective scales like $LiAlO_2$. The test results revealed that the aluminum contents in the coatings should be higher than 25 at.% in order to form and maintain the protective $LiAlO_2$ layers.

Stress-Strain of Geomembranes In Landfill Under Punctiform Loads (폐기물매립장 차수재의 꿰뚫림 하중에 의한 응력-변형)

  • 이광열;정진교
    • Proceedings of the Korean Geotechical Society Conference
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    • 2001.06a
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    • pp.55-65
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    • 2001
  • Geotextiles are usually constructed as a protective layer of geomembranes in liner systems for the solid waste landfill. A protective layer and geomembrane are susceptible to mechanical damage by coarse grains in the overlying drainage layer. In this study, therefore, the strain behavior of geotextile protective layers was investigated using three different types of devices for developing punctiform loads. The results of the study showed that the rates of strain was different depend upon device types for functiform loads. Also, It was found that the increases in strain was approximately linear in range 20 to 6$0^{\circ}C$ , and pp-filament non-woven geotextiles yielded a better efficiency than pp-staple fiber non-woven geotextiles.

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Radiation Safety Management Guidelines for PET-CT: Focus on Behavior and Environment (PET-CT의 방사선안전관리 가이드라인 개발: 행위와 환경을 중심으로)

  • Jung, Jin-Wook;Han, Eun-Ok
    • Journal of Radiation Protection and Research
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    • v.36 no.3
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    • pp.140-147
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    • 2011
  • Our purpose is to specify behavior and environmental factors aimed at reducing the exposed dosage caused by PET-CT and to develop radiation safety management guidelines adequate for domestic circumstances. We have used a multistep-multimethod as the methodological approach to design and to carry out the research both in quality and quantity, including an analysis on previous studies, professional consultations and a survey. The survey includes responses from 139 practitioners in charged of 109 PET-CTs installed throughout Korea(reported by the Korean Society of Nuclear Medicine, 2010). The research use 156 questions using Cronbach's ${\alpha}$ (alpha) coefficients which were: 0.818 for "the necessity of setting and installing the radiation protective environment"; 0.916 for "the necessity of radiation protection", "setting and installing the radiation protective environment"; and 0.885 for "radiation protection". The check list, derived from the radiation safety management guidelines focused on behavior and environment, was composed of 20 items for the radiation protective environment: including 5 items for the patient; 4 items for the guardian; 3 items for the radiologist; and 8 items applied to everyone involved; for a total of 26 items for the radiation protective behavior including: 12 items for the patient; 1 item for the guardian, 7 items for the radiologist; and 6 items applied to everyone involved. The specific check list is shown in(Table 5-6). Since our country has no safety management guidelines of its own to reduce the exposed dosage caused by PET-CTs, we believe the guidelines developed through this study means great deal to the field as it is not only appropriate for domestic circumstances, but also contains specific check lists for each target who may be exposed to radiation in regards to behavior and environment.

Factors Affecting Radiation Protection Behaviors among Emergency Room Nurses (응급실 간호사의 방사선 방어행위 영향요인)

  • Lee, Su Jin;Boo, Sunjoo;Ahn, Jeong-Ah;You, Mi-Ae
    • Journal of Korean Critical Care Nursing
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    • v.13 no.1
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    • pp.15-26
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    • 2020
  • Purpose : This study aimed to examine factors affecting radiation protective behaviors among emergency room nurses by assessing knowledge, attitude, and environment for radiation protection. Methods : The study employed a cross-sectional design. Subjects were a convenience sample of 129 nurses working in emergency rooms of three general hospitals. Data were collected using self-report questionnaires and analyzed using t-test, ANOVA, Pearson correlation coefficients, and multiple regression. Results : The more the nurses received radiation safety education (t=2.26, p=.026), used protective gear (t=4.40, p<.001), and took health screenings (t=2.65, p=.009), the higher their levels of radiation protection behavior. There were significant relations between radiation protective behaviors and attitude (r=.27, p=.002), and radiation protective behaviors and environment for radiation protection (r=.55, p<.001). The factors affecting radiation protective behaviors were protective environment (β=.53, p<.001), protective attitude (β=.32, p<.001), and the use of protective gear (β=.24, p=.002). Conclusions : The government, hospital administrators, and radiation protection-related organization should adopt the following measures to protect emergency room nurses from radiation: research and development of shield instrument, medical examination for emergency room nurses, protocol development of radiation protection behaviors, extension of education chances of radiation protection, and encouraging the use of protective equipment.

Study on Behavior Characteristics of a Pile-Type Vessel Collision Protective Structure (파일형 선박 충돌방호공의 거동특성 연구)

  • Lee, Gye-Hee;Lee, Jeong-Woo
    • Journal of the Society of Disaster Information
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    • v.7 no.1
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    • pp.75-85
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    • 2011
  • In this study, the behavior were analyzed for the bow collision event. The model of protective Structure was consist of slab, RCP and non-linear soil spring. The ship was modeled by bow and midship. The bow model was composed by elastic-plastic shell elements, and the midship was composed by elastic solid element. According to the weight of the ship's change from DWT 10000 until DWT 25000 increments 5000. The head-on collision was assumed, its speed was 5knot. Analysis was carried out ABAQUS/Explicit. As the result, increasing the weight of the ship deformability in athletes and to increase the amount of energy dissipated by the plastic could be confirmed.

Perception-based analytical technique of evacuation behavior under radiological emergency: An illustration of the Kori area

  • Kim, Jeongsik;Kim, Byoung-Jik;Kim, Namhun
    • Nuclear Engineering and Technology
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    • v.53 no.3
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    • pp.825-832
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    • 2021
  • A simulation-based approach is proposed to study the protective actions taken by residents during nuclear emergencies using cognitive findings. Human perception-based behaviors are not heavily incorporated in the evacuation study for nuclear emergencies despite their known importance. This study proposes a generic framework of perception-based behavior simulation, in accordance with the ecological concept of affordance theory and a formal representation of affordance-based finite state automata. Based on the generic framework, a simulation model is developed to allow an evacuee to perceive available actions and execute one of them according to Newton's laws of motion. The case of a shadow evacuation under nuclear emergency is utilized to demonstrate the applicability of the proposed framework. The illustrated planning algorithm enables residents to compute not only prior knowledge of the environmental map, but also the perception of dynamic surroundings, using widely observed heuristics. The simulation results show that the temporal and spatial dynamics of the evacuation behaviors can be analyzed based on individual perception of circumstances, while utilizing the findings in cognitive science under unavoidable data restriction of nuclear emergencies. The perception-based analysis of the proposed framework is expected to enhance nuclear safety technology by complementing macroscopic analyses for advanced protective measures.

Exploration on Risk and Protective Factors of Adolescent Runaway (청소년 가출의 위험요인과 보호요인 탐색)

  • Sang-chul Han
    • Korean Journal of Culture and Social Issue
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    • v.14 no.1_spc
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    • pp.273-298
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    • 2008
  • The purpose of this study is to explore a risk and a protective factors of adolescent runaway based on the previous researches. Runaway of adolescents is increasing, and it is longer and more habit gradually than past. The prevailance methods of runaway is no longer effects on the decrease of adolescent runaway. Now there is to accept adolescent runaway, and has to support the difficult life conditions and the emotional distress of adolescent post-runaway. This means that must be identify and treatment the protective factors having an buffering effect as well as the risk factors influencing on runaway. Although the worse factors related family are the highest risk factors of runaway, others factors including negative peer relation, a academic stress also an have significant influence on runaway. And the protective factors mediating the negative influence of risk factors are an monitoring and controlling of parent as authoritative rearing attitude, a social support, a positive coping strategies, a self-esteem, and a conventional peer group. Protective factors prevent from runaway behavior, as well as improve a resilience of adolescents in the poor environment. The tasks of follow study are to investigate empirically the mediating effects of the protective factors on the problem behavior of post-runaway and resilience of runaway adolescents based on the systematic research design.

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The Effects of Emotional Factors on Environment Behaviors - Comparing the Protective Motivation Theory with the ERB-Based Tentative Model - (환경행동에 미치는 정서적 요인의 영향: -보호동기이론과 환경 책임성 행위모형에 근거한 잠정적 모형의 비교-)

  • 이태연
    • Hwankyungkyoyuk
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    • v.15 no.1
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    • pp.18-30
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    • 2002
  • So far, the environmentally responsible behavior(ERB) model has been applied successfully to explain environment behaviors. But the ERB model has several limitations such as underestimation of social factors on environment behaviors. This study planned to point out that the emotional aspects should be considered seriously for explaining human's behaviors to conserve the environment in the ERB model. In this study, the effects of emotional aspects, such as perceived severity or perceived danger, on environment behaviors were investigated and the protective motivation theory(Rogers, 1983) and the ERB-based tentative model were compared Results showed that teenagers in urban areas realized clearly the severity and danger of environmental threats and do environmentally responsible behaviors more than ones in rural areas. Two model's goodness of fit to explain observed environment behaviors were analyzed through the regression analysis and the AMOS analysis. In the regression analysis, self-efficacy, confirmity toward social norm, and knowledge were involved in the regression equation as statistically meaningful variables in the ERB-based tentative model and self-efficacy and perceived severity were involved in the protective motivation theory. Especially, the AMOS analysis showed that the protective motivation theory was more valid model lot explaining environment behaviors than the ERB-based tentative model. In conclusion, it is reasonable that emotional aspects should be considered as meaningful variables for explaining environment behaviors.

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Assessment of Low Velocity Impact Damage of Filament Wound Composite Vessels with Surface Protective Materials (필라멘트 와인딩 복합재 압력용기의 저속충격손상 평가에 관한 연구)

  • Lee, Jang-Ho;Kang, Ki-Weon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.8
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    • pp.2741-2749
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    • 2010
  • This paper presents the impact damage behavior of filament wound composite vessels and the effect of surface protective materials on their impact resistance. Using an instrumented impact testing machine, a series of impact tests was performed on the base panels and the protected panels (panels with surface protective materials of rubber, kevlar/epoxy or glass/epoxy laminates) that were cut from the full scale vessel. And the impact damage parameters were used to identify the effect of protective materials on the damage resistance of composite vessels. Damage resistance of the composite vessels was considerably affected by the protective materials regardless of the shape of the indenters. Among the protective materials, glass/epoxy laminates was the most effective mean for improving the damage resistance of composite vessels.