• 정보처리학회논문지D
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• 제11D권2호
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• pp.387-396
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• 2004

최근 정보화 프로젝트 수행 능력에 대한 객관적인 검증이 필요하다는 판단에 따라 SI 업계에서는 프로젝트 품질 평가 심사 모형인 CMM 및 SPICE의 등급 인증 획득 또는 등급을 올리기 위한 노력을 기울이고 있다. 공공기관, 민간 발주처들이 사업자의 프로젝트 수행능력에 대한 객관적인 검증을 요구하고 있고, 해외 IT 업체들의 국내 시장 공략에도 효율적으로 대처할 수 있다는 판단에 따라 프로젝트 품질 평가 심사 모형 인증 도입이 확산되고 있다. 그러나 인증의 신뢰성에 대하여 논란이 되고 있는 시점에서 등급을 인증받은 기관이 비 인증기관보다 품질 및 성과에 차이를 보이는지 연구하였다. 연구 결과 현저하게 큰 차이는 아니며 부분적으로 차이가 있는 것으로 나타났다. 국내업체들이 CMM 인증 자체에만 집착하지 말고 컨설팅을 통한 업무 프로세스 개선과정에 의미를 두고 인증에 힘을 기울여야 한다. 즉, 품질인증의 획득 목표가 인증서 획득만이 목표가 아니라 진정한 프로젝트 품질 시스템의 구축, 실현하는 품질 마인드가 우선적으로 제고되어야 말 것이다.

• Kyungpook Mathematical Journal
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• 제28권2호
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• pp.185-196
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• 1988

We study existence of polynomial integrating factors and solutions F(x, y)=c of first order nonlinear differential equations. We characterize the homogeneous case, and give algorithms for finding existence of and a basis for polynomial solutions of linear difference and differential equations and rational solutions or linear differential equations with polynomial coefficients. We relate singularities to nature of the solution. Solution of differential equations in closed form to some degree might be called more an art than a science: The investigator can try a number of methods and for a number of classes of equations these methods always work. In particular integrating factors are tricky to find. An analogous but simpler situation exists for integrating inclosed form, where for instance there exists a criterion for when an exponential integral can be found in closed form. In this paper we make a beginning in several directions on these problems, for 2 variable ordinary differential equations. The case of exact differentials reduces immediately to quadrature. The next step is perhaps that of a polynomial integrating factor, our main study. Here we are able to provide necessary conditions based on related homogeneous equations which probably suffice to decide existence in most cases. As part of our investigations we provide complete algorithms for existence of and finding a basis for polynomial solutions of linear differential and difference equations with polynomial coefficients, also rational solutions for such differential equations. Our goal would be a method for decidability of whether any differential equation Mdx+Mdy=0 with polynomial M, N has algebraic solutions(or an undecidability proof). We reduce the question of all solutions algebraic to singularities but have not yet found a definite procedure to find their type. We begin with general results on the set of all polynomial solutions and integrating factors. Consider a differential equation Mdx+Ndy where M, N are nonreal polynomials in x, y with no common factor. When does there exist an integrating factor u which is (i) polynomial (ii) rational? In case (i) the solution F(x, y)=c will be a polynomial. We assume all functions here are complex analytic polynomial in some open set.

• 대한화학회지
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• 제63권3호
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• pp.183-195
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• 2019

이 연구에서는 2015 개정 교육과정에 따른 과학탐구실험 교과서의 탐구 활동에서 나타난 참탐구 요소를 분석하였다. 탐구 활동을 핵심 개념에 따라 분류한 후, 학생이 자율적으로 참탐구 요소를 계획하거나 실행하도록 한 사례의 특징을 조사하였다. 연구 결과, 참탐구 요소 중 다른 자료 조사하기 요소는 모든 단원에서 높은 비율로 나타났다. 그러나 연구 질문 만들기, 변수 선택하기, 다양한 변수 측정하기, 측정값 변환하기 요소는 미리 안내되거나 구조화된 경우가 많아 역사 및 생활 속의 과학 탐구 단원의 일부 탐구 주제에서만 주로 나타났다. 간단한 또는 복잡한 변인 통제하기, 방해 변수 측정하기, 과정상 결함 고려하기 요소는 교과서에서 고려하지 않거나 명시적으로 언급하지 않은 경우가 많아 모든 단원에서 낮은 비율로 나타났다. 생활 속의 과학 탐구 단원의 참탐구 요소는 소집단 활동을 통하여 다루어지는 경향이 있었다. 연구 결과를 바탕으로 과학탐구실험 교과서 탐구 활동의 개선 방안을 논의하였다.

• 한국융합학회논문지
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• 제13권4호
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• pp.103-110
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• 2022

본 연구는 2016~2018년 국민건강영양조사의 자료를 활용하여 폐경기 여성의 우울 정도와 구강건강행태의 융합적 관련성을 파악하기 위해 실시되었다. 연구대상자는 40세부터 59세 여성 중 건강설문조사의 월경 여부 문항에서 '폐경'이라고 응답한 1,201명이었다. 자료 분석은 복합표본 교차분석 및 로지스틱 회귀분석을 실시하였다. 그 결과 PHQ-9 점수가 '10점 이상'인 집단이 '10점 미만' 집단에 비해 3.12배 흡연을 하는 경향이 나타나, 폐경 여성의 우울 정도는 구강건강행태 중 흡연과 깊은 관련성이 나타났다. 본 연구는 폐경 여성의 우울과 관련되어 있는 구강건강행태를 파악함에 따라 중년 여성의 건강 및 구강건강을 향상시키는 기초자료로 이용될 것을 기대한다.

• Journal of Preventive Medicine and Public Health
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• 제55권6호
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• pp.559-567
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• 2022

Objectives: This study aimed to assess the effect of complete coverage and content of available antenatal care (ANC) on the incidence of low birth weight (LBW) in 4 countries belonging to the Association of Southeast Asian Nations (ASEAN). Methods: Measures of complete coverage and content of ANC services included the frequency of ANC visits and the seven service components (blood pressure measurement, iron supplementation, tetanus toxoid immunization, explanations of pregnancy complications, urine sample test, blood sample test, and weight measurement). The complete coverage and content of ANC services were assessed as high if more than 4 ANC visits and all seven components were delivered. Multivariable logistic regression with complex survey designs was conducted using Demographic Health Survey data from the 4 ASEAN countries in question from 2014 to 2017. Results: The proportion of LBW infants was higher in the Philippines (13.8%) than in Indonesia (6.7%), Cambodia (6.7%), or Myanmar (7.5%). Poor ANC services were associated with a 1.30 times higher incidence of LBW than a high level of complete coverage and content of ANC services (adjusted odds ratio [aOR], 1.30; 95% confidence interval [CI], 1.11 to 1.52). In addition, the risk of LBW was higher in the Philippines than in other countries (aOR, 2.25; 95% CI, 2.01 to 2.51) after adjusting for mothers' demographic/socioeconomic factors, health behaviors, and other factors. Conclusions: In sum, complete coverage and content of ANC services were significantly associated with the incidence of LBW in Indonesia, Cambodia, and Myanmar. The Philippines did not show statistically significant results for this relationship, but had a higher risk of LBW with poor ANC.

• 분석과 대안
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• 제6권1호
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• pp.195-222
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• 2022

From the economic development perspective, economic growth should accompany structural improvement in order to meet complex demands from a society. In the context of development economics, economic growth is critically dependent on successful structural advancement. The issue of structural change is also important for advanced economies as the landscape of modern industry is changing fast. Many advanced countries of slow growth are experiencing dawdling changes in industry structure. However, there is no definitive answer to the question of whether there is a causal relationship between structural change and growth. This study empirically assesses the relationship between structural change or 'speed' thereof and economic growth in developed countries of OECD. Rather than looking into the causes of structural changes, this study simply measures structural changes in OECD economies and examines if structural change is really contributing to growth. The reason why this study focuses on advanced countries of OECD is rather obvious; technological innovation and emergence of new industries pressure these countries to restructure their economies to address these new challenges though they are at stages well beyond conventional industrialization. And structural rigidity can always limit growth even in advanced countries. The main results of this study can be summarized as a positive relationship between 'change and growth'. 'Change' in this study refers to changes in the industrial structure based on value-added and was analyzed to have a close positive relationship with economic growth. This result is consistent with arguments of early development economists emphasizing structural upgrade as an indispensable process for growth and development. The result of this study potentially confirms that the main argument of development economics is valid also for advanced economies. One of our results suggests that business/professional services and social services should be main targets for restructuring for advanced economies. The rational may be that rapid convergence of manufacturing and services is a key for structural advancement in the era of new technologies. Obviously, as manufacturing technology and production are standardized, it is difficult to secure international competitiveness through traditional manufacturing alone and the role of R&D, design, logistics, and marketing is becoming more important.

• Journal of Korean Biological Nursing Science
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• 제25권3호
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• pp.183-204
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• 2023

Purpose: The purpose of this study was to evaluate the applicability of ChatGPT in biological nursing science education. Methods: This study was conducted by entering questions about the field of biological nursing science into ChatGPT versions GPT-3.5 and GPT-4 and evaluating the answers. Three questions each related to microbiology and pharmacology were entered, and the generated content was analyzed to determine its applicability to the field of biological nursing science. The questions were of a level that could be presented to nursing students as written test questions. Results: The answers generated in English had 100.0% accuracy in both GPT-3.5 and GPT-4. For the sentences generated in Korean, the accuracy rate of GPT-3.5 was 62.7%, and that of GPT-4 was 100.0%. The total number of Korean sentences in GPT-3.5 was 51, while the total number of Korean sentences in GPT-4 was 68. Likewise, the total number of English sentences in GPT-3.5 was 70, while the total number of English sentences in GPT-4 was 75. This showed that even for the same Korean or English question, GPT-4 tended to be more detailed than GPT-3.5. Conclusion: This study confirmed the advantages of ChatGPT as a tool to improve understanding of various complex concepts in the field of biological nursing science. However, as the answers were based on data collected up to 2021, a guideline reflecting the most up-to-date information is needed. Further research is needed to develop a reliable and valid scale to evaluate ChatGPT's responses.

• 한국항행학회논문지
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• 제27권3호
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• pp.247-254
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• 2023

미국의 가인(GAIN)은 Pilot/Controller Collaboration Initiatives 보고서에서 "조종사와 항공교통관제사는 하루 종일 서로 이야기하지만 거의 의사소통하지 않는다."라고 기술하였다. 조종사-항공교통관제사 간의 안전 운항에 대한 인식과 문화, 또는 다른 요인에서 오는 차이점이 절차와 지시에 대하여 서로 간의 오해가 있는가라는 의문이 연구의 시발점이 되었다. 촉박한 시간 내에 해결해야 하는 많은 과정은 James Reason의 Swiss Cheese Theory와 같이 연쇄적인 위험요인을 거쳐 사고를 유발할 가능성을 높인다. 비행의 주체가 되는 조종사-항공교통관제사 간의 복합 요소가 상당 부분 차지하고 있는데 불구하고 두 집단 간의 안전 운항을 위한 통합적인 관리는 이루어지고 있지 않다. 본 연구는 조종사-항공교통관제사 간의 안전 운항을 위한 안전 및 교육의 통합적인 관리를 JCRM을 통해서 이루고자 기술하였다.

• International Journal of Computer Science & Network Security
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• 제24권1호
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• pp.71-84
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• 2024

This paper presents a critical analysis of the current application of big data in higher education and how Learning Analytics (LA), and Educational Data Mining (EDM) are helping to shape learning in higher education institutions that have applied the concepts successfully. An extensive literature review of Learning Analytics, Educational Data Mining, Learning Management Systems, Informal Learning and Online Social Networks are presented to understand their usage and trends in higher education pedagogy taking advantage of 21st century educational technologies and platforms. The roles of and benefits of these technologies in teaching and learning are critically examined. Imperatively, this study provides vital information for education stakeholders on the significance of establishing a teaching and learning agenda that takes advantage of today's educational relevant technologies to promote teaching and learning while also acknowledging the difficulties of 21st-century learning. Aside from the roles and benefits of these technologies, the review highlights major challenges and research needs apparent in the use and application of these technologies. It appears that there is lack of research understanding in the challenges and utilization of data effectively for learning analytics, despite the massive educational data generated by high institutions. Also due to the growing importance of LA, there appears to be a serious lack of academic research that explore the application and impact of LA in high institution, especially in the context of informal online social network learning. In addition, high institution managers seem not to understand the emerging trends of LA which could be useful in the running of higher education. Though LA is viewed as a complex and expensive technology that will culturally change the future of high institution, the question that comes to mind is whether the use of LA in relation to informal learning in online social network is really what is expected? A study to analyze and evaluate the elements that influence high usage of OSN is also needed in the African context. It is high time African Universities paid attention to the application and use of these technologies to create a simplified learning approach occasioned by the use of these technologies.

• 한국정보과학회논문지:소프트웨어및응용
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• 제30권3_4호
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• pp.212-218
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• 2003

상태 불변식은 도달 가능한 모든 상태에서 만족되는 속성이다. 불변식은 복잡한 소프트웨어 시스템의 분석과 이해에 사용될 뿐만 아니라 안전성, 궁극성, 일관성 등과 같은 시스템 검증에도 사용된다. 이와 같은 이유로 인해서, 유한 상태 기계 모델로부터 상태 불변식을 추출하는 연구가 활발히 진행되고 있다. 상태 불변식을 생성하는 기존 연구에서는 도달 가능한 상태가 모두 고려됐다. 따라서 생성된 상태 불변식은 길고 복잡해서, 사용자가 이해하기 어려웠다. 본 논문에서는 '어떻게 상태 불변식을 단순화 할 것인가\ulcorner` 란 질문에 대한 답을 보인다. 상태 불변식의 복잡성은 고려되어진 상태의 크기에 강하게 좌우된다. 고려된 상태들이 작으면 작을수록, 상태 불변식의 길이는 짧다. 단순한 상태 불변식을 생성하기 위해서는, 전체 상태 공간보다는 관심 있는 특정 부분(즉 범위)에 집중해야 한다. 관심 있는 범위를 표현하기 위하여 본 논문에서는 CTL 논리를 사용한다. CTL로 범위가 표현되면, 혼합 도달성 분석을 이용하여 범위 내에 속하는 상태들을 찾는다. 명백히, 이 방법으로 계산된 상태 집합은 도달 가능한 모든 상태의 부분 집합이다. 따라서, 더 약하지만 더 이해력 있는 상태 불변식을 얻는다.