• The Korean Journal of Applied Statistics
• /
• v.35 no.2
• /
• pp.265-283
• /
• 2022

MovieLens data consists of recorded movie evaluations that was often used to measure the evaluation score in the recommendation system research field. In this paper, we provide additional information obtained by clustering user-specific genre preference information through movie evaluation data and movie genre data. Because the number of movie ratings per user is very low compared to the total number of movies, the missing rate in this data is very high. For this reason, there are limitations in applying the existing clustering methods. In this paper, we propose a convex clustering-based method using the pairwise fused penalty motivated by the analysis of MovieLens data. In particular, the proposed clustering method execute missing imputation, and at the same time uses movie evaluation and genre weights for each movie to cluster genre preference information possessed by each individual. We compute the proposed optimization using alternating direction method of multipliers algorithm. It is shown that the proposed clustering method is less sensitive to noise and outliers than the existing method through simulation and MovieLens data application.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
• /
• v.15 no.1
• /
• pp.209-224
• /
• 2020

This study started from the question of whether the preference of corporate recruitment can be achieved without any difference between the start-up experiencer and the general job seekers. Therefore, the purpose of the study is to identify the factors related to start-ups that affect the preference of job seekers for companies, and to analyze the differences in the factors related to start-ups between general job seekers and job seekers with start-up experience. Third, it is to see the difference in the preference for employment between job seekers with start-up experiences and general job seekers. The independent variables of the research model were entrepreneurship, motivation for start-up (job search), and characteristics of the job seekers (founder). The dependent variables were job preference, and the moderating variables were presented as job seekers' classification (job seekers with start-up experience vs. general job seekers). The subjects of the study were personnel managers of 100 companies with more than 5 years of establishment and 100 new companies with less than 5 years of establishment. The questionnaire was distributed in two types, and 189 respondents, including 101 job seekers with start-up experiences and 88 general job seekers, were finally used for analysis. The results of the study were as follows. First, as a result of multiple regression analysis on both experienced start-up experiencers and general job seekers, only entrepreneurship had an effect on preference for recruitment. Second, the moderating effect of job seekers' classification was found only in the relationship between motivation for start-up and preference for employment. Third, the result of multiple regression analysis based on the start-up experiencers showed that the relationship between the motivation for start-up, the preference for recruitment, the characteristics of founders and the preference for recruitment was statistically significant. On the other hand, the characteristics of the founder and the preference for employment were rejected. Fourth, the results of the study based on general job seekers showed that the motivation for job search decreased the preference for employment. The study did not provide the results of differences in recognition between different industries, traditional enterprises and venture businesses due to the limitation of small examples. There is no clear definition of start-up experiencers either. However, it is meaningful to suggest the implications of what preparations should be made when the start-up experiencers close their start-ups and turn their career into employment and to help them to accurately recognize the importance of entrepreneurship. It also provides the preference of the general job seekers for the company, the preparation for successful employment, and the implications for the direction of the future start-up revitalization.

• Journal of Fisheries and Marine Sciences Education
• /
• v.25 no.1
• /
• pp.198-210
• /
• 2013

The purpose of this study investigates high school students' recognition and realities on the integrated science essay and is to suggest desirable direction of integrated science essay of how eduction. To this end, this paper was a questionnaire developed for use, it consists of the status, the writing skills and recognition of integrated science essay. Firstly, all grade students recognize the interest in integrated science essay class, but the need for third grade boys urgently was feeling. Second, STEAM class as a whole than average preference was. Third, integrated science essay was the most relevant, then was mathematics, languages, philosophy ethics, and social. Fourth, integrated science essay class with boys than girls in grade 1, science essay writing, reading science-related essay books, grammar, knowledge of the science and philosophy of science lessons, classes STEAM, read commentary essay reference all on the item, the higher affinity. Currently being implemented in integrated science essay test compared to the first, team teaching approach in schools project under one class teaches students how many teachers should be made. Second, it would require modifications of course content tailored to the preferences of female preference for science higher grade female students to disappear.

• Phonetics and Speech Sciences
• /
• v.1 no.1
• /
• pp.33-40
• /
• 2009

This study examines how young speakers of Seoul Korean produce tri-consonantal clusters /1kt/ and /1pt/ as in palk-ta ('to be bright') and palp-ta ('to step on'). Production data were collected from 20 speakers of Seoul Korean. The results of narrow transcription of the data showed that simplification is not obligatory as some speakers often preserve all three consonants. When simplified, there was a clear asymmetry between /1kt/ and /1pt/. Speakers showed no clear preference for either C1 preservation (C1=/1/) or C2 preservation (C2=/k/ in /1kt/ and /p/ in /1pt/) in production of /1kt/, but in production of /1pt/, strong preference was found for C1-preserved to C2-preserved variant. When compared with production data in Cho (1999), simplification patterns appear to have changed over the past 10 years, in a direction to preserve the first member of the cluster (/1/) more often, especially with /1kt/. There was no substantial between-item variation, indicating that simplification patterns are not lexically specified. Finally, the results suggest that the process of tri-consonantal simplification has not been fully phonologized in the grammar of the language as evident in substantial inter- and intra-speaker variation.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
• /
• v.26 no.6
• /
• pp.294-300
• /
• 2014

In this study, we investigated and evaluated the air conditioning operation of the driver according to the temperature difference between the inside and outside of a car parked outside during the summer. We suggest including a comfort mode to the car air conditioning system to improve the thermal comfort of the driver, in which the comfort can be maintained for a longer time. For the a result of our experiment, in the cases with temperature of above $45^{\circ}C$ inside of the car, the subjects preferred strong air blow with the face and the arms in the direction of the blow. In the cases with temperature of below $40^{\circ}C$ inside of the car, the subjects preferred lower volume of air blow. In the temperature below $28.1^{\circ}C$ inside of the car, the mean temperature on the skin of the driver reached the comfort zone.

• Journal of the Korean Society of Food Culture
• /
• v.36 no.5
• /
• pp.441-454
• /
• 2021

This study analyzed consumer needs for the development of elderly-friendly HMR products in China. In developing the products, items needed to be improved, types and packages of the necessary products, additional improvements and food preferences were investigated. According to the demographic characteristics of elderly Chinese consumers, these was analyzed as well. A survey was conducted on a total of 370 elderly people, and data analysis was performed using SPSS 18.0 program. Items related to product quality safety, such as "marks of origin by ingredient", "rich nutrients", "expansion of letter size of packaging", "rich nutrients" and "clear manufacturing date and expiration date", were required to develop HMR products. The types of products that should be developed were porridge and noodles, and the packaging types that should be developed were eco-friendly packaging and recycled packaging. In addition, "low-calorie HMR", "development of various seasonings", "use of eco-friendly food ingredients" and "HMR to digest easily" should be improved. The demand for product improvement and food preference showed significant differences according to the degree of education, monthly income and oral health. The results were intended to prepare basic data for setting the direction when developing elderly-friendly HMR.

• Journal of the Architectural Institute of Korea Planning & Design
• /
• v.34 no.3
• /
• pp.3-10
• /
• 2018

The purpose of this study is to suggest the direction and recognition for applying to component of Emotion of the elementary school space with characteristics of child development. For the accomplishment of the study is to deduce types of emotional component and characteristics of child development based on literature and advanced research related to 'Child development and behavior', 'The elementary school space', and concept of 'children' and 'emotion'. In addition, The level of recognition of teachers and students about creation plan of school space by types of emotion component and preference and relationships of students on emotion component of elementary school space is investigated. The space environment has great influence in childhood going through big changes in physical, cognitive, emotional and social ways, Providing space environment built with emotion component such as 'affordance', 'diversity', 'territoriality', and 'relationships' considering characteristics of child development is most important of all, In particular, when building indoor space in elementary schools where students going through various development stages live, providing friendly environments for emotion of children put top priority on students in the decision-making process and guaranteed the participation of students is expected.

• Science of Emotion and Sensibility
• /
• v.12 no.3
• /
• pp.331-340
• /
• 2009

As the cultural importance of local environment has been increasing, interests of local residents for city design has also increased. City design can inspire local residents' pride and redefine the city image to both local and outside world. Therefore, this study analyzes the city's(Pohang city) status, environmental characteristics, and local residents' design image preference; and based on the analysis, this study suggests standard design for public facilities that constitute "streets", that can realize the city image identity. For the suggestion, scenery image and public facilities status of the twenty-four areas in the city were analyzed. Also, to decide the design direction of public facilities that can constitute the city's consistent ideology, thoughts, and image, design preference factors for public facilities by local residents were surveyed and analyzed. The design guidelines and a standard design were established for total of thirty-one public facilities based on the analysis. The outcome will enable provision of communication media to express the charming city image and also of material that can be reflected in the integrated city scenery project in the future.

• Journal of the Korean Society of Costume
• /
• v.63 no.8
• /
• pp.90-105
• /
• 2013

The purpose of this study was to explore how experiential factors in sportswear stores influenced store satisfaction, brand preference, and purchase intention among potential consumers, and to reveal the moderating effects of impulsive buying. The subjects of this study were 306 male and female adults in their 20s and 30s, who had visited sports brand stores within the past year. To analyze the data, Cronbach's ${\alpha}$, structural model analysis and path analysis were performed. The results of this study were as follows. First, there is a strong relationship between store satisfaction and experiential factors in sportswear apparel stores. All experiential factors significantly influenced store satisfaction in a positive direction. Second, consumers' store satisfaction positively influenced on brand preference. Third, consumers' store satisfaction had positive influences on their purchasing intention. Fourth, consumers' impulsive buying tendency showed significant moderating effect on the experiential factors. Consumers with low level of impulsive buying tended to be influenced more by 'think', 'relate', and 'sense' experiential factors on their store satisfaction. However, consumers with a high level of impulsive buying tendency revealed that they were more likely to be influenced by 'act' and 'feel' experiential factors.

• Journal of Gifted/Talented Education
• /
• v.22 no.1
• /
• pp.39-59
• /
• 2012

This study has two purposes: The first is to compare gifted with non-gifted about learning styles and examine differences in the preference of learning styles between group characteristics depending on gender. The second is to examine differences between gifted and non-gifted about the preference of learning styles. The participants were 152 students from the middle schools in A City. 76 students of them belonged to the gifted group and the rest were non-gifted group. LSDI Learning Styles Diagnostic Inventory has been employed as measurement tools. Besides descriptive statistics, ANOVA, ${\chi}^2$ analysis were used to measure items. The results from data analysis are as follows. First, there was difference in learning styles between gifted and non-gifted. Second, there was not difference in the preference of learning styles between groups depending on the gender. Finally, this study discussed the results and their implication, the direction of future research in understanding and interpreting of learning styles for their practical usages.