• 경영과학
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• 제32권4호
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• pp.193-207
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• 2015

Government-funded research institutes (GRIs) have played a pivotal role in national R&D in Korea. To achieve desired goals of GRIs with the limited R&D budget, their performance along with time needs to be measured and compared so that appropriate R&D policies can be formulated and implemented. This study measures the dynamic performance of GRIs from the efficiency perspective using the window model of data envelopment analysis (DEA). DEA is a non-parametric approach to measuring the relative efficiency of decision-making units (DMUs) with multiple inputs and outputs, and the DEA window model can capture the dynamic changes in efficiency of DMUs during multiple periods. The relative efficiency of GRIs is measured from the two perspectives: R&D and R&BD. Patents, papers, technology transfers are selected as outputs for R&D while compensated technology transfers and technology royalty are employed as outputs for R&BD. This study measures and compares the two types of performance of 20 Korean GRIs under the control of National Research Council of Science and Technology during the period of six years from 2008 to 2013. The results are expected to provide fruitful implications for national R&D policy making.

• 보건교육건강증진학회지
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• 제27권4호
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• pp.165-175
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• 2010

Objectives: The purpose of this study is to evaluate the program theory of a lifestyle intervention program for the prevention and treatment of metabolic syndrome. Methods: The program evaluated is a tailored intervention for multiple health behavior associated with metabolic syndrome which is informed by theoretical constructs from the Intervention Mapping and Transtheoretical model. The program components include one-to-one health counseling, a self-management handbook, and a health diary. To evaluate program impact theory we examined the logic of program goals and objectives, intervention methods and strategies, and the theoretical constructs of program materials through document review and matrix building. Results: This evaluation has found that the intervention program applied social cognitive theory constructs to design intervention methods and strategies in addition to the Transtheoretical model: self-monitoring for goal setting and monitoring skill, outcome expectation for the benefits of health behavior change, and interaction with environment for observational learning through modeling. While the intervention addresses multiple determinants and behaviors, it is limited to an individual level and lacks social and environmental approaches. Following the Transtheoretical framework, the contents of the intervention materials were developed utilizing consciousness raising as a main strategy for earlier stages of change, and counterconditioning and stimulus control for later stages of change. Conclusion: Program theory evaluation can be a process of enhancing program validity. It would also be necessary for providing basis for efficient program implementation. When comparisons of program theory between similar programs are possible, program theory and validity will be strengthened when comparisons of program theories between similar programs are possible.

• Asian Pacific Journal of Cancer Prevention
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• 제13권5호
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• pp.2269-2277
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• 2012

Background: Health risks associated with unhealthy behaviours in adolescent and university students contribute to the development of health problems in later life. During the past twenty years, there has been a dramatic increase in public, private, and professional interest in preventing disability and death through changes in lifestyle and participation in screening programs. The aim of the study was to evaluate university students' health-promoting lifestyle behaviour for cancer prevention. Method: This study was carried out on university students who had education in sports, health and social areas in Celal Bayar University, Manisa, Turkey. The health-promoting lifestyles of university students were measured with the "health-promoting lifestyle profile (HPLP)" The survey was conducted from March 2011 to July 2011 and the study sample consisted of 1007 university students. T-test, ANOVA and multiple regression analyses were used for statistical analyses. Results: In the univariate analyses, the overall HPLP score was significantly related to students' school, sex, age, school grades, their status of received health education lessons, place of birth, longest place of residence, current place of residence, health insurance, family income, alcohol use, their status in sports, and self-perceived health status. Healthier behaviour was found in those students whose parents had higher secondary degrees, and in students who had no siblings. In the multiple regression model, healthier behaviour was observed in Physical Education and Sports students, fourth-year students, those who exercised regularly, had a good self-perceived health status, who lived with their family, and who had received health education lessons. Conclusion: In general, in order to ensure cancer prevention and a healthy life style, social, cultural and sportive activities should be encouraged and educational programmes supporting these goals should be designed and applied in all stages of life from childhood through adulthood.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권11호
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• pp.5537-5555
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• 2017

Having the characteristics of unlinkability, anonymity, and unforgeability, blind signatures are widely used for privacy-related applications such as electronic cash, electronic voting and electronic auction systems where to maintain the anonymity of the participants. Among these applications, the blinded message is needed for a certain purpose by which users delegate signing operation and communicate with each other in a trusted manner. This application leads to the need of proxy blind signature schemes. Proxy blind signature is an important type of cryptographic primitive to realize the properties of both blind signature and proxy signature. Over the past years, many proxy blind signature algorithms have been adopted to fulfill such task based on the discrete logarithm problem (DLP) and the elliptic curve discrete log problem (ECDLP), and most of the existing studies mainly aim to provide effective models to satisfy the security requirements concerning a single blinded message. Unlike many previous works, the proposed scheme applies the signcryption paradigm to the proxy blind signature technology for handling multiple blinded messages at a time based on elliptic curve cryptography (ECC). This innovative method thus has a higher level of security to achieve the security goals of both blind signature and proxy signature. Moreover, the evaluation results show that this proposed protocol is more efficient, consuming low communication overhead while increasing the volume of digital messages compared to the performance from other solutions. Due to these features, this design is able to be implemented in small low-power intelligent devices and very suitable and easily adoptable for e-system applications in pervasive mobile computing environment.

• 디지털융복합연구
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• 제14권1호
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• pp.219-227
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• 2016

본 연구는 다중역할을 하는 간호전문직 기혼 여성의 대학원생활 경험을 이해하고, 그들의 생생한 경험의 의미를 밝히기 위하여 Colaizzi의 현상학적 연구방법을 사용한 질적연구이다. 연구대상은 간호전문직 기혼 여성으로서 대학원에 재학하여 일과 학업을 병행하고 있는 석 박사 과정생으로 이들을 대상으로 반구조적인 개인심층면담을 진행하였다. 연구결과 도출된 5개의 범주는 '시간에 쫓기며 살아감', '심도 깊은 학업 부담감에 짓눌림', '가족에 대한 죄책감', '많은 역할간의 갈등으로 몸부림침', '힘든 가운데 찾은 의미와 보람'으로 나타났다. 결론적으로 현대사회의 급속한 발전과 함께 인간의 건강에 대한 건강문제를 해결함으로써 건강증진에 기여 할 수 있는 전문적인 간호사가 될 수 있도록 다양한 지지체계를 통하여 대학원과정을 배려하고 지지해 준다면 간호학문에 대한 정체성 확립을 돕고 대상자들의 건강증진을 위하여 더욱 전문적인 간호를 할 수 있을 것이다. 본 연구결과는 간호전문직 기혼 여성의 대학원생활에 대한 생생한 경험을 바탕으로 범주화한 결과로 합리적인 중재 방안의 개발에 유용한 기초자료로 이용될 수 있다.

• 한국지능시스템학회논문지
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• 제18권2호
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• pp.187-192
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• 2008

본 논문은 실내외 공간에서 인간을 포한함 이동물체의 영상정보를 이용하여 이동로봇의 자기위치를 인식하기 위한 방법을 제시하고 있다. 제시한 방법은 로봇자체의 DR센서 정보와 카메라에서 얻은 영상정보로부터 로봇의 위치추정방법을 결합한 것이다. 그리고 이동물체의 이전 위치정보와 관측 카메라의 모델을 사용하여 이동물체에 대한 영상프레임 좌표와 추정된 로봇위치간의 관계를 표현할 수 있는 식을 제시하고 있다. 또한 이동하는 인간과 로봇의 위치와 방향을 추정하기 위한 제어방법을 제시하고 이동로봇의 위치를 추정하기 위해서 칼만필터 방법을 적용하였다. 그리고 시뮬레이션 및 실험을 통하여 제시한 방법을 검증하였다.

• 정보처리학회논문지A
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• 제13A권4호
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• pp.305-316
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• 2006

현재의 거의 대부분의 3차원 그래픽 프로세서는 한 개의 삼각형을 빠르게 처리하는 구조로 되어 있으며, 향후 여러 개의 삼각형을 병렬적으로 처리할 수 있는 프로세서가 등장할 것으로 예상된다. 고성능으로 삼각형을 처리하기 위해서는 각 래스터라이저마다 고유한 픽셀 캐시를 가져야 한다. 그런데, 병렬로 처리되는 경우 각각의 프로세서와 프레임 메모리 간에 일관성 문제가 발생할 수 있다. 본 논문에서는 각각의 그래픽 가속기에 픽셀 캐시를 사용가능 하게 하면서 성능을 증가시키고 일관성 문제를 해결하는 병렬 렌더링 프로세서를 제안한다. 제안하는 구조에서는 픽셀 캐시 미스에 의한 지연(latency)을 감소시켰다. 이러한 2가지 성과를 위하여 현재의 새로운 픽셀 캐시 구조에 효과적인 메모리 구조를 포함시켰다. 실험 결과는 제안하는 구조가 16개 이상의 래스터라이저에서 거의 선형적으로 속도 향상을 가져옴을 보여준다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제6권1호
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• pp.178-202
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• 2012

In this paper, we first survey cross-layer architectures for Wireless Sensor Networks (WSNs) and Wireless Multimedia Sensor Networks (WMSNs). Afterwards, we propose a novel cross-layer architecture for QoS provisioning in clustered and multi-hop based WMSNs. The proposed architecture provides support for multiple network-based applications on a single sensor node. For supporting multiple applications on a single node, an area in memory is reserved where each application can store its network protocols settings. Furthermore, the proposed cross-layer architecture supports heterogeneous flows by classifying WMSN traffic into six traffic classes. The architecture incorporates a service differentiation module for QoS provisioning in WMSNs. The service differentiation module defines the forwarding behavior corresponding to each traffic class. The forwarding behavior is primarily determined by the priority of the traffic class, moreover the service differentiation module allocates bandwidth to each traffic class with goals to maximize network utilization and avoid starvation of low priority flows. The proposal incorporates the congestion detection and control algorithm. Upon detection of congestion, the congested node makes an estimate of the data rate that should be used by the node itself and its one-hop away upstream nodes. While estimating the data rate, the congested node considers the characteristics of different traffic classes along with their total bandwidth usage. The architecture uses a shared database to enable cross-layer interactions. Application's network protocol settings and the interaction with the shared database is done through a cross-layer optimization middleware.

• 한국융합학회논문지
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• 제10권11호
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• pp.523-532
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• 2019

메타인지는 학습자가 문제 해결을 위해 목표 및 계획을 수립하고 평가해 나가는 인지의 결과물로써 간호사의 임상적 역량 중에 핵심역량이다. 연구의 목적은 간호대학생의 메타인지에 영향을 주는 요인을 분석하고자 함이다. 2017년 8월 15일부터 10월 19일까지 서울과 경기도에 위치한 간호대학의 205명 대학생에게 메타인지, 자기주도 학습능력, 그릿, 학습환경, 학습유형에 대해 설문조사를 시행하였고 수집된 자료는 SPSS/Win 22.0 program를 이용하여 기술통계, t-test, ANOVA, Pearson correlation coefficient, multiple regression으로 분석하였다. 본 연구 결과, 메타인지는 자기주도 학습능력, 그릿 및 학습환경과 통계적으로 유의한 정적 상관관계를 보였으며 자기주도 학습능력과 그릿은 간호대학생의 메타인지에 유의한 영향요인으로 나타났다. 간호대학생의 자기주도 학습능력과 그릿을 높여 문제해결을 위한 목표설정에 중요한 영향을 미치는 메타인지 수준을 높일 수 있는 교육과정 개발이 필요하다.

• 근관절건강학회지
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• 제31권2호
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• pp.75-85
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• 2024

Purpose: The goals of this study were to identify the relationships among learning agility, grit, positive psychological capital, and nursing performance and to determine the impact of these factors on clinical nursing performance. Methods: Between November and December 2021, a descriptive survey design was conducted with a convenience sample of 260 clinical nurse participants from two regional hospitals. Data were collected using the Learning Agility Scale, Grit Scale, Psychological Capital Questionnaire, and the Nursing Performance Scale. Data from 248 nurses were analyzed using descriptive statistics, independent t-test, one-way analysis of variance, Pearson's correlation, and multiple linear regression analysis using SPSS 27.0. Results: Results revealed significant positive correlations between nursing performance and learning agility, grit, and positive psychological capital. Stepwise multiple regression analysis identified positive psychological capital as the strongest predictor of nursing performance, followed by work experience, learning agility, grit, and educational level. These variables accounted for 51% of the variance in nursing performance. Conclusion: This study underscored the importance of positive psychological capital, learning agility, and grit in improving nursing performance. Healthcare organizations should prioritize the development of these attributes among nurses. Implementing strategies to enhance these factors in nursing practice and education could improve nursing performance, potentially resulting in better patient outcomes and increased job satisfaction. Future research should explore specific interventions to cultivate these qualities and assess their long-term impact on nursing practice.