• 디지털융복합연구
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• 제19권7호
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• pp.95-111
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• 2021

인공지능과 빅데이터의 기술혁신에도 인공지능과 빅데이터가 시장경쟁 영향에 대한 이론연구들은 아직 초기이다. 따라서 본 논문은 인공지능, 빅데이터, 데이터 공유가 신규 진입기업에 미치는 영향을 게임이론을 활용하여 분석하였다. 먼저 기업의 경영환경을 내부와 외부로 구분하였다. 이후 인공지능 알고리즘을 (1) 고객마케팅, (2) 비용 절감, (3) 비용 절감을 위한 자동화 알고리즘으로 구분하였다. 또한 빅데이터를 외부 및 내부 데이터로 구분하였다. 분석 결과 외부 데이터의 공유는 기존 기업의 고객마케팅 알고리즘에는 영향이 없고 신규 기업의 진입장벽을 완화했다. 하지만 기존 기업의 비용 절감 알고리즘들과 내부 빅데이터의 개선은 신규기업의 시장진입 장벽이 될 수 있다. 이러한 시사점들은 (1) 인공지능, 빅데이터, 데이터 공유에 따른 시장구조, 경쟁, 기업행태 영향분석과 (2) 인공지능과 빅데이터 정책수립 시 이바지할 수 있다.

• 대한인간공학회지
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• 제30권2호
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• pp.303-310
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• 2011

In this study, we employ CPM-GOMS analysis for explaining physical and cognitive processes and for quantitatively predicting when users are typing Korean text messages on mobile phones using both hands. First, we observe the behaviors of 10 subjects, when the subjects enter keypads with both hands. Then, basing upon MHP, we categorize the behaviors into perceptual, cognitive, motor operators, and then we analyze those operators. After that, we use the critical paths to model two task sentences. Also, we used Fitts' law method which was applied many times to predict text entering time on mobile phone to compare with the results of our CPM-GOMS model. We followed Lee's (2008) method that is well suited for text entry task using both hands and calculate total task time for each task sentences. For the sake of comparison between the actual data and the results predicted from our CPM-GOMS model, we empirically tested 10 subjects and concluded that there were no significant differences between the predicted values and the actual data. With the CPM-GOMS model, we can observe the human information processes composed on the physical and cognitive processes. Also we verified that the CPM-GOMS model can be well applied to predict the users' performance when they input text messages on mobile phones using both hands by comparing the predicted total task time with the real execution time.

• 가정과삶의질연구
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• 제34권4호
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• pp.1-19
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• 2016

The present study aimed at investigating the relations between the amount of child care experienced in the first three years of life and socioemotional development of children at age 4 indicated by problem behaviors and peer competence. Using the longitudinal data of the Panel Study of Korean Children(PSKC), the information of 1,699 children were analyzed. The results indicated that any child care experience, hours in child care, full-time child care and early entry to child care were significantly related to children's externalizing behavior problem and play disruption at age 4. Some significant relations were detected between child care experience and better peer competence as well. Interestingly, the patterns of relations were different for boys and girls. Being in child care, a greater amount of child care and early entry to child care tended to be related to externalizing problem behaviors of boys and whereas they were more related to peer competence of girls indicated by play interaction, play disruption and play disconnection. Child care hours at age 3 were relative stronger predictors of children's development compared to those at age 1 or at age 2. The findings imply that the amount of child care during the first 3 years of life does not have strong harmful effects on preschoolers' socioemotional development and that there are differences in the effects of child care on boys and girls.

• 한국학교보건학회지
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• 제33권3호
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• pp.164-174
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• 2020

Purpose: The purpose of this study was to identify the factors affecting tuberculosis prevention behaviors in North Korean adolescent refugees. Methods: From September 16 to October 8, 2019, a survey was conducted to collect data from 143 North Korean adolescent refugees aged 13 to <25 at alternative and general schools in Seoul and Gyeonggi Province. The scale developed by Park (2008) and adapted by Cha (2012) was used to rate tuberculosis prevention behaviors in daily life with the aim of preventing high school students from getting infected with tuberculosis. The collected data were processed through frequency analysis, descriptive statistics, t-test, ANOVA, Pearson's correlation coefficients, and multiple linear regression, using SPSS 25.0. Results: The mean score was 13.65 for knowledge of tuberculosis, 44.23 for attitudes towards tuberculosis, and 41.33 for tuberculosis prevention behaviors. Significant differences were found according to gender, country of origin, duration of stay in South Korea, tuberculosis examination, pre-entry chest x-ray, education about tuberculosis, alcohol intake, and subjective health status. A positive correlation was found between knowledge, attitudes, and prevention behaviors. The factors affecting tuberculosis prevention behaviors were attitudes (β=.38, p<001) and subjective health status (β=.26, p<.001). Conclusion: It is necessary to provide attitude-based education that can reinforce positive attitudes in order to improve North Korean adolescent refugees' tuberculosis prevention behaviors. This is expected to help them pay more attention to health care and become better at prevention behaviors. It is, therefore, necessary to develop a tuberculosis prevention education program with the aim of making them more knowledgeable about tuberculosis and providing them with systematic and sustainable education.

• 대한가정학회지
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• 제41권7호
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• pp.91-106
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• 2003

Multiple features of infant day-care are explored, including age of entry, quantity, quality and stability of day-care. And relative contribution of day-care and family factors on maternal behaviors are examined. Data were gathered from 299 mothers who have infants aged under 36 months using self-report questionnaires. Results show that more than 40% infants enter day-care before 6 months of their life and about 85% of infants have far more than 30 hours of care a week. Half of the infants experience different day-care arrangements more than once. Compared to the other types of day-care, frequency of day-care arrangement change and quality of care are highest in private child-care centers. A series of Hierarchical regression results reveal that quality of day care is negatively related to mothers' control behavior whereas positively related to mothers' responsive behavior. But in general, family and child characteristics play a greater role in mothers' parenting behaviors than infant day-care characteristics.

• 한국학교ㆍ지역보건교육학회지
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• 제12권2호
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• pp.1-12
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• 2011

Objectives: This study was carried out to investigate parent behavioral factors associated with perceived family support of college fresh-woman, in part to find the way of successful college life. Methods: Self-administered questionnaires were given to 256 freshman enrolled in college, between 2weeks may and June 2009. The questionnaire items general characteristics included religion, college entry form(high school graduation/other college expierence), allowance, college life satisfaction, self rated health and family support, parenting behaviors. Parenting behavior consists of affection, reasonable explanation, abuse, excessive interference, supervision, negligence, inconsistencies. The dependent variable is perceived family support, independent variable mother and father behaviors that consisted of above 8 spheres. Results: For the statistical analysis, the t-test was used for the family support and parenting behaviors according to the general characteristics. The influence elicited by the instrument of parenting behavior was determined using multiple regression under the control of general characteristics. The influencing factors are mothers's affection and father's supervision, neglection and affection. Conclusion: Based on the study results, it is important father's behavior to their children especially they are regarded as father's neglect is not support them. We suggest that, for father's behavior strategies should be developed to perceive their family support.

• 디지털산업정보학회논문지
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• 제11권2호
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• pp.73-90
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• 2015

When we apply file commands on files in a directory, the directory as well as the file suffer changes in timestamps of MFT entry. Based on understanding of these changes, this work provides a digital forensic analysis on the timestamp changes of the directory influenced by execution of file commands. NTFS utilizes B-tree indexing structure for managing efficient storage of a huge number of files and fast lookups, which changes an index tree of the directory index when files are operated by commands. From a digital forensic point of view, we try to understand behaviors of the B-tree indexes and are looking for traces of files to collect information. But it is not easy to analyze the directory index entry when the file commands are executed. And researches on a digital forensic about NTFS directory and B-tree indexing are comparatively rare. Focusing on the fact, we present, in this paper, directory timestamp changes after executing file commands including a creation, a copy, a deletion etc are analyzed and a method for finding forensic evidences of a deletion of directory containing files. With some cases, i.e. examples of file copy and file deletion command, analyses on the problem of timestamp changes of the directory are given and the problem of finding evidences of a deletion of directory containging files are shown.

• 대한인간공학회지
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• 제27권4호
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• pp.73-83
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• 2008

With a rapid extension of functions in mobile phones, text input method has become very important for mobile phone users. Previous studies for text input methods were focused on Fitts' law, emphasizing expert's behaviors with one-handed text input method. However, it was observed that 97% of Korean mobile phone users input texts with two-hands. Therefore, this study was designed to develop a prediction model of two-handed Hangul text entry method including novice users as well as experts for mobile phone. For this study, Fitts' law was hypothesized to predict experts' movement time(MT) whereas Hick-Hyman law for visual search time was hypothesized to be added to MT for novices. The results showed that the prediction model was well fitted with the empirical data for both experts and novices with less than 3% error rates. In conclusion, this prediction model of two-handed Hangul text entry including novice users was proven to be a very effective model for modeling two-handed Hangul text input behavior for both experts.

• 한국발생생물학회지:발생과생식
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• 제20권3호
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• pp.267-274
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• 2016

Cichlid fish species exhibit characteristic sexual behaviors according to not only reproductive stages but also social status. In a reproductive season, Astatotilapia burtoni males compete for females and a small number of dominant winners finally obtain the chance of spermiation. In addition to the characteristic behaviors, the dominant males have relatively bigger gonadotropin-releasing hormone 1 (GnRH1) neurons in the preoptic area (POA) of brain compared to those of subordinate males. Although the stimulatory effect of GnRH1 in vertebrate reproduction is well established, little is known about the triggering signal pathway to control GnRH1 neurons and GnRH1-mediated sexual behavior. In the present study, we evaluated the potential effect of TOR inhibitor rapamycin in relation to the cichlid male behaviors and GnRH1 neuron. After 14 h and 26 h of intraventricular injection of rapamycin, behavior patterns of chasing and courtship display did not show significant changes between rapamycin- and DMSO-injected males. Behaviors of spawning site entry increased in rapamycin-injected fish at 26 h post-injection than at 14 h post-injection significantly (P<0.05). Meanwhile, there was a tendency that GnRH1 neurons' soma size in the POA shrank by rapamycin injection, whereas the testes did not show notable changes. Taken together, these results suggest the possible role of TOR signal on GnRH1-mediated sexual behavior in cichlid dominant males, although further biological characterization of the TOR signaling pathway will be required to clarify this matter.

• 한국문헌정보학회지
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• 제56권1호
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• pp.27-45
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• 2022

한국에 거주하는 외국인 유학생들의 증가에도 불구하고, 이들의 일상생활에서의 정보추구행위에 관한 연구는 미진한 상황이다. 본 연구는 한국에 거주하는 외국인 유학생들의 정착단계(입국 전, 초기정착단계, 현재)에 따른 정보요구 및 정보탐색행위를 결정적사건기법(Critical Incident Technology: CIT)을 통하여 조사하였다. 한국에 거주하는 외국인 유학생들은 일상생활과 관련된 정보요구를 학교생활 또는 학업에 관련된 정보요구보다 빈번하게 보고하였으며, 과제 등 학습과 직결된 정보요구는 현재 단계에 이르러서야 보고되었다. 유학생들은 정보요구를 해결하기 위해 웹사이트, 소셜미디어, 친구 등 여러 정보원을 사용하였다. 일방향 정보원인 웹사이트에 대하여는 부정적인 경험을 토로하는 경우가 많은 반면, 소셜미디어나 친구 등의 양방향 정보원에 대한 만족도는 높았다. 국내 유학생들이 정보탐색과정에서 경험하는 가장 큰 어려움은 언어 문제인 것으로 나타났으며, 그 외에 한국의 사회시스템에 익숙하지 못해 겪는 어려움도 보고되었다. 정착단계별로 변화하는 유학생들의 정보요구와 정보탐색행위에 대한 이해를 바탕으로, 외국인 유학생들의 일상생활에서의 정보탐색행위를 향상시킬 수 있는 방안이 논의되었다.