• Title/Summary/Keyword: static resilience

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Development of a Framework for Evaluating Water Quality in Estuarine Reservoir Based on a Resilience Analysis Method (회복탄력성 분석 기반 담수호 수질 평가 프레임워크 개발)

  • Hwang, Soonho;Jun, Sang Min;Kim, Kyeung;Kim, Seok Hyun;Lee, Hyunji;Kwak, Jihae;Kang, Moon Seong
    • Journal of The Korean Society of Agricultural Engineers
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    • v.62 no.5
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    • pp.105-119
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    • 2020
  • Although there have been a lot of efforts to improve water quality in the estuarine reservoir, overall the water quality problems of the estuarine reservoirs remain. So, it is essential to establish water quality management plans under a comprehensive understanding of the environmental characteristics of the estuarine reservoir. Therefore, in this study, a resilience analysis framework for evaluating the estuarine reservoir's water quality was suggested for improving existing assessment method for water quality management plan. First, as a result of analyzing the static resilience to each scenario, it was found that from the S3 scenario in which dredging was conducted considerably, the resilience of about 30% more than the current estuarine reservoir system was restored. Second, as a result of analyzing the dynamic resilience, if cost and time are considered, there is no significant difference in robustness and resourcefulness, so it can be seen that the resilience of the estuarine reservoir can be efficiently improved by simply performing dredging up to the level of Scenario 3. Finally, as a result of comparing static and dynamic resilience, since static resilience is only presented as a single value, the differences and characteristics of the resilience capacity of the estuarine reservoir might be overlooked only by the static resilience analysis. However, in the aspect that it is possible to interpret the internal recovery capacity of the estuarine reservoir in multiple ways with various indicators (robustness, redundancy, resourcefulness, rapidity), evaluating water quality based on dynamic resilience analysis is useful.

Mediating Effect of Grit in the Relationship between Resilience and University Life Adaptation of College Students Majoring in Beauty after COVID-19 (코로나19(COVID-19) 이후 뷰티학과 전문대 학생들의 회복탄력성과 대학생활적응의 관계에서 그릿(Grit)의 매개 효과)

  • Min-Hee Kim;Na-Yeon Kim
    • Fashion & Textile Research Journal
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    • v.24 no.6
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    • pp.789-800
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    • 2022
  • This study investigates the effect of recovery elasticity of beauty college students on university life adaptation during COVID-19. Further, the mediating effect of grit in relation to recovery elasticity and university life adaptation is analyzed. Survey data of 223 students (female: 192; male: 31) were collected for multiple and intermediate regression analyses using SPSS 24.0. The results reveal a static correlation between the lower factors of resilience, glittery, and adaptation to college life and that the resilience of junior college students in the beauty department had a static effect on grit and their adaptation to college life. Passion, a subordinate factor of grit, is mediated by the effect of grit on the relationship between resilience and adaptation to university life. However, perseverance, another subordinate factor of grit, did not have any such mediating effect. These results confirm the importance of grit, particularly passion, for resilience and adaptation to college life. It was confirmed that resilience was due to college life adaptation of beauty department students, and it was confirmed that passion, a sub-factor of grit, also had a mediating effect. Therefore, it is judged that resilience induces physical and mental adaptation, interpersonal adaptation, and academic adaptation necessary for college life, and works in many ways to improve the quality of life of beauty department junior college students. Instructors should consider developing educational programs for improving recovery elasticity and grit to help students better adapt to university life.

Detecting Java Class Theft using Static API Trace Birthmark (정적 API 트레이스 버스마크를 이용한 자바 클래스 도용 탐지)

  • Park, Hee-Wan;Choi, Seok-Woo;Lim, Hyun-Il;Han, Tai-Sook
    • Journal of KIISE:Computing Practices and Letters
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    • v.14 no.9
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    • pp.911-915
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    • 2008
  • Software birthmark is the inherent characteristics that can identify a program. In this paper, we propose a Java class theft detection technique based on static API traces of class files. We utilize control flow analysis to increase resilience, and we apply the semi-global alignment trace comparison algorithm to increase credibility. The credibility and resilience experiments for XML parsers show that our birthmark is more efficient than existing birthmarks.

Network analysis for assessing urban resilience from the perspective of urban flooding: case study of Seoul, Korea (도시침수 관점에서의 도시회복력 평가를 위한 네트워크 분석: 서울특별시 중심으로)

  • Park, HyungJun;Song, Sumin;Kim, DongHyun;Lee, Seung Oh
    • Journal of Korea Water Resources Association
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    • v.57 no.6
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    • pp.371-383
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    • 2024
  • The quantification methods and definitions of resilience vary and are studied across many fields. However, this diversity can lead to gaps in interpretation regarding the meaning and indicators of resilience, potentially having a negative impact on resilience assessments. Therefore, uniform standards for defining and quantifying resilience are essential. This study presented a definition of resilience and socio-structural evaluation methods of resilience through network analysis. Furthermore, through analyzing various definitions of resilience, the definition of resilience in the context of urban flooding was presented. Distinguishing between static and dynamic resilience, an evaluation method based on common attributes was proposed. Lastly, the economic effects of introducing resilience were analyzed using an inundation trace map. Future research on the secondary effects through standardized resilience assessments is expected to be widely utilized in decision-making stages within urban flood policies.

A Study on Factors Affecting Cancer Patients (암 환자의 극복력 영향요인)

  • Lee, Eun-Kyung
    • The Journal of Korean Academic Society of Nursing Education
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    • v.13 no.1
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    • pp.52-58
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    • 2007
  • Purpose: The purpose of this study was to discover the factors affecting cancer patients. Method: The subjects of the study were 111 cancer patients over 20 years old, being treated in 3 hospitals in Seoul. The collection of materials was a self-report survey which was carried out from October 1, 2005 to September 30, 2005. The collected materials were analyzed by using frequency, percentage, average, standard deviation, t-test, one-way ANOVA, Pearson's Correlation Coefficient and Multiple Regression. Result: The average resilience of the cancer patients was 85.9 The average of the hope was 133.32. The family support score was 43.06. There was a statistically meaningful static correlation (r=618, p=.000) in the resilience and hope, in the resilience and family support (r=.539, p=.000), and in the hope and family support (r=.729, r=.000). As a result of the analysis with multiple regression, of the factors affecting cancer patients hope is a meaningful factor (38.2%), to explain resilience of cancer patients. A study on the factors affecting the cancer patients.

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Ego-resilience, Disaster-Experience and Core competencies of Disaster response between Paramedic Students' and Nursing Students'

  • Jung, Ji-Yeon;Yun, Hyeong-Wan
    • Journal of the Korea Society of Computer and Information
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    • v.24 no.9
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    • pp.109-117
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    • 2019
  • This study was attempted to provide fundamental data in a disaster response education program by comparing the differences between students of the paramedic and nursing in ego-resilience, disaster-experience and core competencies of disaster response. The data is collected from March 2 to April 2, 2019, on a total of 358 students (196 paramedic students and 162 nursing students) based in Jeolla Province. The structured questionnaire were used as research tools and the collected data were analyzed by using the SPSS program as frequency, percentage, t-test, ANOVA and Pearson's correlation coefficient. The average score of total ego-resilience among the subjects was 86.97 out of 125 points. The number of paramedic students who experienced or witnessed the disaster situation in person was 11.2%, and the number of nursing students was 11.7%. The core competence of disaster response was 3.21% in paramedic students and 3.16% in nursing students. The ego-resilience of the paramedic and nursing students according to their general characteristics is statistically significant differences (t=2.797, p<.005) and the paramedic students has an average score of 3.52 points, which is higher than the nursing students (3.42 points). General characteristics and experience in disasters are statistically significant differences (t=2.797, p<.005), paramedic students had more disaster experiences (3.11 points) than nursing students (2.67 points). It indicated the static correlation relationship between ego-resilience, disaster experience and core competences of disaster response (p<.000). Through this study, the paramedic students were found to be more ego-resilience, more disaster experience and more critical capacity for disaster treatment than nursing students.

System dynamics simulation of the thermal dynamic processes in nuclear power plants

  • El-Sefy, Mohamed;Ezzeldin, Mohamed;El-Dakhakhni, Wael;Wiebe, Lydell;Nagasaki, Shinya
    • Nuclear Engineering and Technology
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    • v.51 no.6
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    • pp.1540-1553
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    • 2019
  • A nuclear power plant (NPP) is a highly complex system-of-systems as manifested through its internal systems interdependence. The negative impact of such interdependence was demonstrated through the 2011 Fukushima Daiichi nuclear disaster. As such, there is a critical need for new strategies to overcome the limitations of current risk assessment techniques (e.g. the use of static event and fault tree schemes), particularly through simulation of the nonlinear dynamic feedback mechanisms between the different NPP systems/components. As the first and key step towards developing an integrated NPP dynamic probabilistic risk assessment platform that can account for such feedback mechanisms, the current study adopts a system dynamics simulation approach to model the thermal dynamic processes in: the reactor core; the secondary coolant system; and the pressurized water reactor. The reactor core and secondary coolant system parameters used to develop system dynamics models are based on those of the Palo Verde Nuclear Generating Station. These three system dynamics models are subsequently validated, using results from published work, under different system perturbations including the change in reactivity, the steam valve coefficient, the primary coolant flow, and others. Moving forward, the developed system dynamics models can be integrated with other interacting processes within a NPP to form the basis of a dynamic system-level (systemic) risk assessment tool.

The Study on the Effect of Ego-resilience, Empathic Ability of Preliminary Broadcasters on Communication Ability : Focusing on General Characteristics (예비방송인들의 자아탄력성, 공감능력이 의사소통능력에 미치는 영향 연구 : 일반적 특성을 중심으로)

  • Jung, Mi-young
    • The Journal of the Korea Contents Association
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    • v.20 no.6
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    • pp.579-589
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    • 2020
  • The purpose of this study is to understand the effects of ego-resilience, empathic ability of preliminary broadcasters on communication ability and to explore what university should do. The subjects of the study analyzed the relationship between self-resilience, empathic ability and communication ability among 333 preliminary broadcasters in the journal and broadcasting, media related departments of five universities in Busan. As a result of the research analysis, first, the preliminary broadcasters had the highest empathic ability, followed by communication ability and ego-resilience. Second, ego resilience according to the general characteristics of preliminary broadcasters was significantly different according to gender, major satisfaction, and club activities. There were significant differences according to satisfaction and club activities. Third, the correlation between ego resilience, empathic ability, and communication ability of preliminary broadcasters has a significant static correlation, and the correlation between empathic ability and communication ability is the highest. Fourth, the factors influencing communication ability were empathic ability, ego resilience, and gender. It will be meaningful as a study that the factors influencing communication ability related to preliminary broadcasters are empathic and ego resilience. Therefore, it is necessary to prepare a plan such as opening a curriculum to improve the communication ability of preliminary broadcasters.

Natural Frequency Analysis of Sleeper Floating Track System using Modal Test Technique (모달시험기법을 이용한 침목플로팅궤도의 고유진동수 분석)

  • Jung-Youl Choi
    • The Journal of the Convergence on Culture Technology
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    • v.10 no.3
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    • pp.833-838
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    • 2024
  • The urban railway sleeper floating track(STEDEF) is a structure that structurally separates the sleepers and the concrete bed using sleeper boots and resilience pads to reduce vibration transmitted to the concrete bed. Recently, the resilience pads of sleeper floating tracks that have been in use for more than 20 years are deteriorating. Accordingly, in order to evaluate the performance of the resilience pad, a static spring stiffness test is being performed after extracting the resilience pad. This evaluation technique is performed after replacing the resilience pad in use. However, the track natural frequency can change depending on the resilience pad spring stiffness and the uplift and subsidence of the concrete bed. In this study, modal testing technique was used to evaluate the track natural frequency. For this purpose, the sleeper boots material, resilience pad spring stiffness, and track natural frequency according to concrete bed uplift and subsidence were measured using modal tests at a laboratory scale. It was analyzed that the natural frequency of the sleeper floating track was directly affected by changes in the spring stiffness of the resilience pad. In addition, the change in natural frequency due to the uplift and subsidence of the concrete bed was also found to be large. Therefore, it is believed that the modal test technique presented in this study can be used to evaluate the resilience pad deterioration and voided sleepers.

Ecological responses of natural and planted forests to thinning in southeastern Korea: a chronosequence study

  • Cho, Yong-Chan;Pee, Jung-Hun;Kim, Gyeong-Soon;Koo, Bon-Yoel;Cho, Hyun-Je;Lee, Chang-Seok
    • Journal of Ecology and Environment
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    • v.34 no.4
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    • pp.347-355
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    • 2011
  • Effects of forest thinning on community level properties have not been understood yet in Korea. We investigated regeneration patterns and trajectories after a disturbance by applying a chronosequence approach. Light availability, litter and woody debris cover, and species composition were determined for twenty 50 m line-transect samples representing a disturbance duration gradient (within 11 years). Environmental factors such as light availability and coverage of woody debris and litter changed abruptly after thinning and then returned to the pre-disturbance state. Although species richness was gained at shrub and ground layer in a limited way in both forests, cover of various functional types revealed diversity in their responses. Notably, Alnus firma stands exhibited a larger increment of cover in woody plants. Ordination analysis revealed different regeneration trajectories between natural and planted stands. Based on ordination analysis, rehabilitated stands showed movement to alternative states compared with natural ones, reflecting lower resilience to perturbation (i.e., lower stability). Our results suggest that community resilience to artificial thinning depends on properties of the dominant species. But to get more explanatory ecological information, longer-term static observations are required.