김정은 시대 북한의 경제 변화 방향성에 관한 연구-북한 학술지 『경제연구』 주제 분석을 중심으로-

김차영,김명철 연세대학교 통일연구원 2019 통일연구 Vol.23 No.2

The purpose of this paper is to analyze the topics of the“Kyungjaeyeongu,”one of the most prominent academic journals on the North Korean economy, in order to show the trends of the North Korea's industrial and economic changes. This study is significant in that it provides the basis to understand the survival strategy of the North Korean regime and predict the future of the regime. The topic study of the "Kyungjaeyeongu" demonstrates that North Korea is likely to continue its marketization policy, rather relying on the internal economic growth through science and technology, instead of international trade and investment. It also shows that the regime's high interest in business administration and science technology. The outcome of the analysis reflects how the regime has strived to overcome the economic crisis exacerbated by the economic sanctions imposed by the UN and the US due to the North Korea's nuclear weapons problems. 본 글의 목적은 북한의 경제학 부문의 이론 잡지인 『경제연구』의 주제 분석을 통해 김정은 시대 북한 산업구조 변화의 추이와 경제 변화의 방향성을 살펴보는 것이다. 북한 정권이 추구하고 있는 경제정책에 대한 연구는 북한 체제의 생존 전략을 이해하고 체제변화의 향방을 예측해볼 수 있는 단서를 제공해 준다는 점에서 그 의의가 크다. 『경제연구』에 실린 논문의 주제분석 결과 김정은의 시장화 정책은 지속적으로 추진될 것으로 보인다. 다만 이러한 시장화 정책은 과학 기술 발전을 통해 내부적으로 성장을 이루는 정책에 중점을 두어 시행될 것으로 보인다. 또한 과학 기술과 경영 효율화로 생산성 증대를 목표로 하고 있으며 경영학 분야에 대한학문적 관심이 높아지고 있다고 분석된다. 이는 북한 핵문제로 인해 유엔과 미국의 대북제재의 강도가 점차 높아지는 상황에서 북한 경제위기를 극복하기 위한 북한 정권의 고민과 전략을 잘드러낸다고 하겠다.

서울市內 高等學校 교사의 性知識, 態度 및 학생에 대한 性敎育 要求 調査

金次永 韓國學校保健學會 1990 韓國學校保健學會誌 Vol.3 No.1

The purpose of this study was to investigate the high school teachers sexual knowledge, attitude and their need of sex education for the students in Seoul. These data were collected by questionnaire in Oct. 1989. The results was compared by the type of teacher (school health nurse and high school teacher) , involving in sex education or not, age, marital status and religion. The major findings of this study were as follows : 1. The mean score of sexual knowledge of the school health nurses was higher than the high school teachers.(P<0.05) (the average correct answer rate:the school health nurses=80.85%, the high school teachers=62.65% )Female teachers who were involved in sex education got higher score than the male high school teachers and female teachers who were not. (P <0.05) The married female high school teachers got higher score than never-married. (p <0.05) 2. About the sexual attitudes, the respondents were asked in the Likert's four-point scale with 3 groups of questions that were anatomical and physiological terminology about sex, normal sexual life and immoral sexual life. About anatomical and physiological terminology about sex, they had a little positive feeling. (mean score =2.62) The school health nurses and the male high school leachers had more positive feeling than the female. (P <.0.05) Also the aged and married male high school teachers had more positive feeling than others. (P <0.05) About normal sexual life, they had a little positive feeling and moderately permissive altitude. (feeling mean score=2.96. attitude mean score=3.23) The school health nursecs and ,the male high school teachers had more positive feeling than the female. (P<0.05) And the male high school teachers had more permissive attitude than the female. (P< 0.05) About immoral sexual life, they had strongly negative feeding and conservative attitude. ( feeling mean score=3.49,attitude mean score =3.35) The school health nurses and the fema1e high school teachers had more negative feeling and conservative attitude than the male. (P<0.05) And the male protestant high school teachers had more conservative attitude than no-religion group. (P<0.05) 3. There was a weak correlation between sexual knowledge and attitude. 4. There was no significant difference about starting of sex education between the school health nurses and the high school leachers. (P > 0.05) Generally, they answered that the starting of sex education about physical growth and development could be given with the students'physical growth and development. But for the sex education about emotional and social development, they answered that the education should be given later than the emotional and social development of students. 62.1% of the school health nurses did sex education and 35.5% of the high school teachers did. The common contents of sex education were intersexual-fellowship(date) . venereal disease and marriage. And the education about abnormal sex-behavior, divorce and sexual intercourse was given rarely.

최적화된 Gradient-Boost를 사용한 서울 자전거 데이터의 결정 요인 예측

김차영,김윤,Kim, Chayoung,Kim, Yoon 국제문화기술진흥원 2022 The Journal of the Convergence on Culture Technolo Vol.8 No.6

Seoul introduced the shared bicycle system, "Seoul Public Bike" in 2015 to help reduce traffic volume and air pollution. Hence, to solve various problems according to the supply and demand of the shared bicycle system, "Seoul Public Bike," several studies are being conducted. Most of the research is a strategic "Bicycle Rearrangement" in regard to the imbalance between supply and demand. Moreover, most of these studies predict demand by grouping features such as weather or season. In previous studies, demand was predicted by time-series-analysis. However, recently, studies that predict demand using deep learning or machine learning are emerging. In this paper, we can show that demand prediction can be made a little better by discovering new features or ordering the importance of various features based on well-known feature-patterns. In this study, by ordering the selection of new features or the importance of the features, a better coefficient of determination can be obtained even if the well-known deep learning or machine learning or time-series-analysis is exploited as it is. Therefore, we could be a better one for demand prediction.

포스터 전시 발표 순서 : 감염 ; 일시적 시력소실을 동반한 급성 뇌병증을 일으킨 급성 A형 간염 1예 (초)

김차영,허상택,배인규,임민희,김재희 대한내과학회 2009 대한내과학회지 Vol.77 No.4S

중복 그룹을 위한 공급자와 소비자 간 인과관계 정보 전송 프로토콜

김차영,안진호,Kim, Cha-Young,Ahn, Jin-Ho 한국인터넷방송통신학회 2011 한국인터넷방송통신학회 논문지 Vol.11 No.6

무선 센서네트워크의 통신 하부구조는 응용 요구사항에 매우 종속적인 경향이 있다. 가쉽 통신은 P/S(공급자 대 소비자) 패러다임에 기반 한 정보 전달 기능을 제공함에 있어서 하부구조가 가질 수 있는 확장성 문제를 해결하기 위한 전도유망한 방법 중 하나로 대두되고 있다. 특히, 센서네트워크에서 요구하는 메시지 전달 순서 보장 및 중복 그룹 지원이 중요함에도 불구하고 이러한 요구사항을 만족하기 위한 가쉽형 전달 프로토콜에 대한 연구가 거의 이루어지지 않고 있다. 본 논문에서는 중복 그룹을 위한 공급자와 소비자 간의 최신 인과관계 정보 전송 프로토콜을 제안한다. 이 프로토콜에서는 공급자인 센서 리더들이 인과관계 정보를 융합하여 그들 간의 인과적 메시지 전달 순서를 일관성 있게 보장한다. 반면에 최신 인과 관계 정보만이 공급자로부터 소비자로 각 멀티캐스트 메시지에 피기백 되어 가쉽형 전달을 통해 전송된다. 이러한 확장적 특성은 최소한의 의미 있는 정보만을 요구하는 응용분야에 매우 적합할 수 있다. Communication infrastructure of wireless sensor networks significantly tends to depend on application requirements. Gossip communication is becoming one of the promising solutions for addressing its scalability problems in providing information propagation functionality based on the P (publish)/S (subscribe) paradigm. In particular, despite the importance of both guaranteeing message delivery order required and supporting overlapping groups in sensor networks, there exist little research works on development of gossip-style dissemination protocols to satisfy all these requirements. In this paper, we present the latest causal information transmission protocol between publishers and subscribers for overlapping groups. In this protocol, sensor leaders as publishers might guarantee consistently causally ordered message delivery among themselves by aggregating causality information. On the other hand, only the latest causal information piggybacked on each multicast message is transmitted from publishers to subscribers through gossip-style dissemination. Its scalability feature might be highly suitable for the area of the applications requiring only the minimum meaningful information.

Combining Support Vector Machine Recursive Feature Elimination and Intensity-dependent Normalization for Gene Selection in RNAseq

김차영,Kim, Chayoung Korean Society for Internet Information 2017 인터넷정보학회논문지 Vol.18 No.5

고처리 시퀀싱과 빅데이터 및 크라우드 컴퓨팅에 혁신이 일어나면서, RNA 시퀀싱도 획기적인 변화가 일어, RNAseq가 기존의 DNA 마이크로어레이를 대체하여, 빅-데이터를 형성하고 있다. 현재, RANseq 이용한 유전자 조절망(GRN) 까지 연구가 활성화 되고 있는데, 그 중 한 분야가 GRN의 기본 요소인 특징 유전자를 빅-데이터에서도 구별하고 기존에 알려진 것 외에 새로운 역할을 찾는 것이다. 그러나, 이러한 연구 방향에 부합하는 빅-데이터를 처리할 수 있는 컴퓨테이션 방법이 아직까지 매우 부족하다. 따라서 본 논문에서는 RNAseq 빅-데이터를 처리할 수 있도록 기존의 SVM-RFE알고리즘을 밀집도-의존 정규화에 병합하여, NCBI-GEO와 같은 빅-데이터에서 공개된 일부의 데이터에 개선된 알고리즘을 적용하고 해당 알고리즘에 의해 나온 결과의 성능을 평가한다. In past few years, high-throughput sequencing, big-data generation, cloud computing, and computational biology are revolutionary. RNA sequencing is emerging as an attractive alternative to DNA microarrays. And the methods for constructing Gene Regulatory Network (GRN) from RNA-Seq are extremely lacking and urgently required. Because GRN has obtained substantial observation from genomics and bioinformatics, an elementary requirement of the GRN has been to maximize distinguishable genes. Despite of RNA sequencing techniques to generate a big amount of data, there are few computational methods to exploit the huge amount of the big data. Therefore, we have suggested a novel gene selection algorithm combining Support Vector Machines and Intensity-dependent normalization, which uses log differential expression ratio in RNAseq. It is an extended variation of support vector machine recursive feature elimination (SVM-RFE) algorithm. This algorithm accomplishes minimum relevancy with subsets of Big-Data, such as NCBI-GEO. The proposed algorithm was compared to the existing one which uses gene expression profiling DNA microarrays. It finds that the proposed algorithm have provided as convenient and quick method than previous because it uses all functions in R package and have more improvement with regard to the classification accuracy based on gene ontology and time consuming in terms of Big-Data. The comparison was performed based on the number of genes selected in RNAseq Big-Data.

웜홀 라우팅을 지원하는 스타그래프 네트워크에서 전 포트 브로드캐스팅 알고리즘

김차영,이상규,이주영,Kim, Cha-Young,Lee, Sang-Kyu,Lee, Ju-Young 한국정보과학회 2002 정보과학회논문지 : 시스템 및 이론 Vol.29 No.2

병렬 처리 시스템의 상호연결 네트워크로써 스타 그래프 구조간 그간 널리 사용되어 왔던 하이퍼규브에 비해 지름 및 차수 등의 특성에 우수한 성능을 보임으로 인해 최근 많은 연구자들의 관심을 받고 있다. 스타 그래프 네트워크에서 여러가지 통신문제들이 연구되어 지고 있는데 그러한 통신 문제 중 에 가장 기본이 될수있는 문제 중의 하나가 브로드캐스팅이다. 본 논문에서는 윕홀라우팅을 지원하는 스타 그래프 네트워크 시스템에서의 브로드캐스팅 문제를 다룬다. 윔홀라우팅을 사용하는 네트워크에서는 전송 노드간의 거리보다 전송 시 링크 충돌을 최소화하는 것이 전체 통신 시간을 줄이는 중요한 요소가 되는 데 본 논문에서는 스타 그래프 네트워크에서의 해밀 토니안 경로를 이용하여 링크 충돌이 없이 n 차원 스타 네트워크$([long_n n!]+1)$ 통신스텝이 전체 브로드캐스팅이 완료되는 알고리즘을 제시한다. 이는 이론 절 하한값 $([long_n n!]+1)$ 에 근접한 결과로 기존의 n-1 통신 스텝이 걸리는 알고리즘 보다 향상된 결과이다. Recently star networks are considered as attractive alternatives to the widely used hypercube for interconnection networks in parallel processing systems by many researchers. One of the fundamental communication problems on star graph networks is broadcasing In this paper we consider the broadcasting problems in star graph networks using wormhole routing. In wormhole routed system minimizing link contention is more critical for the system performance than the distance between two communicating nodes. We use Hamiltonian paths in star graph to set up link-disjoint communication paths We present a broadcast algorithm in n-dimensional star graph of N(=n!) nodes such that the total completion time is no larger than $([long_n n!]+1)$ steps where $([long_n n!]+1)$ is the lower bound This result is significant improvement over the previous n-1 step broadcasting algorithm.

한국과 중국 홈쇼핑 현황과 전망에 관한 비교연구

김차영,Jin Ye,정태민,박철 한국유통학회 2011 한국유통학회 학술대회 발표논문집 Vol.2011 No.8

플립드러닝 성과를 예측하기 위한 설문조사 기반의 비정형 데이터 분석

김차영,김윤 국제문화기술진흥원 2023 The Journal of the Convergence on Culture Technolo Vol.9 No.6

The study summarizes the experience of operation in the application of flipped learning to various IT-related liberal arts subjects, and proposes a specific application method. So far, most of the studies have analyzed various strategies and learner responses to flipped learning. Currently, it is the time when teachers, who are the main operators of the flipped learning class, need to study how to provide immediate feedback and application while running the relevant courses. Studies related to this are gradually coming out. In general, most of the studies on sharing reference materials through the results after applying various strategies such as developing the structure of class operation by instructors themselves, combining them with discussion classes, or developing various contents. This study proposes a method to analyze how various strategies can be applied in the subject and obtain results simultaneously with class operation by analyzing unstructured data, which is a survey that can receive immediate feedback.

일상재구성법을 통해 살펴본 한국 장애인과 비장애인의 행복

김차영,이인영 한국장애인고용공단 고용개발원 2024 장애와 고용 Vol.34 No.1

연구목적: 본 연구의 목표는 장애인이 느끼는 일상 속 행복을 비장애인과의 비교를 통해 살펴보는 것이었다. 연구방법: 『2022 한국인의 행복조사』 데이터를 활용하여 장애인과 비장애인의 중요한 활동, 활동을 함께한 사람 그리고 행복감의 관계를 분석하였다. 연구결과: 첫째, 장애인이 비장애인에 비하여 일상을 보고했던 날 느낀 행복감과 전반적인 행복감 모두 낮게 보고하였다. 둘째, 직업 관련 일이 일과 중 가장 중요한 활동이었다고 응답한 장애인 참가자가 그렇지 않은 장애인 참가자보다 더 높은 수준의 행복감을 보고하였고, 이는 직업 관련 일을 했던 비장애인 참가자와 유사한 정도였다. 셋째, 장애인 참가자의 경우직업 관련 일이 가장 중요한 활동이었는지 여부가 일상적인 행복감을 거쳐 전반적인 행복 수준에까지 영향을 미쳤으나, 비장애인 참가자의 경우는 그렇지 않았다. 결론: 본 연구는 비장애인과 달리 장애인에게는 직업이 일상 속 행복과 개인의 삶 전반적인 행복 모두에 특히 주요한 영향을 미친다는 것을 발견하였다. Purpose: The purpose of this study was to compare the everyday happiness of people with disabilities and people without disabilities. Method: We analyzed the relationship between important activities, the people with whom activities are performed, and happiness among people with disabilities and people without disabilities using data from the 2022 Korean Happiness Survey. Results: First, compared to people without disabilities, people with disabilities reported lower levels of both happiness on the day they reported their daily routine and overall happiness. Second, individuals with disabilities who responded that job-related work was the most important activity reported higher levels of happiness than those who did not, similar to those without disabilities who reported job-related work. Third, for participants with disabilities, whether job-related work was the most important thing influenced their daily well-being and then subsequently their overall level of happiness, but not for participants without disabilities. Conclusions: This study reveals that, unlike people without disabilities, people with disabilities reported that their job was the most important aspect of happiness.