• Research in Mathematical Education
• /
• 제27권2호
• /
• pp.157-173
• /
• 2024

Researchers continue to emphasize the centrality of proof in the context of school mathematics and the importance of proof to student learning of mathematics is well articulated in nationwide curricula. However, researchers reported that students' performance in proving tasks is not promising and students are not likely to see the need to prove a proposition even if they learned mathematical proof previously. Research attributes this issue to students' tendencies to accept an empirical argument as proof for a mathematical proposition, thus not being able to recognize the limitation of an empirical argument as proof for a mathematical proposition. In Korea, there is little research that investigated high school students' views about the need for proof in mathematics and their understanding of the limitation of an empirical argument as proof for a mathematical generalization. Sixty-two 11^th graders were invited to participate in an online survey and the responses were recorded in writing and on either a four- or five-point Likert scale. The students were asked to express their agreement with the need of proof in school mathematics and to evaluate a set of mathematical arguments as to whether the given arguments were proofs. Results indicate that a slight majority of students were able to identify a proof amongst the given arguments with the vast majority of students acknowledging the need for proof in mathematics.

• Biomedical Science Letters
• /
• 제30권2호
• /
• pp.49-55
• /
• 2024

This study uses the 9th 1st year (2022) National Health and Nutrition Examination Survey to analyze the relationship between sleep time and the number of existing teeth for the adult population aged 19 or older to provide basic data on related dental development. There is a purpose. This program is designed to improve sleep quality and maintain the number of viable teeth in the future. The subjects were 53,220 people who answered the questions. The collected data were analyzed using SPSS (ver 21.0) program using complex samples, and chi-square analysis and logistic return analysis were performed. As a result, it was found that 2.537 times more existing teeth remained when sleep time was 9 hours or more than when sleep time was 6 hours or less, and there was a statistically significant difference. In conclusion, it is necessary to recognize the importance of the number of remaining teeth and to make efforts to manage personal immunity, such as sleep management for adults, and to promote and prevent oral care and oral health education in order to maintain the number of remaining teeth.

• Korean Institute of Interior Design Journal
• /
• 제21호
• /
• pp.121-128
• /
• 1999

The purpose of this study is to provide practical guide for the Preference of exterior design in Apartment. The data is collected through questionnaire survey including observations and interviews. The sample consists of 229. The data is analyzed by using SPSS-PC. The major findings are as follows. (1) Most of residents recognize the importance of exterior design of apartments. (2) Most of residents are satisfied with the exterior design such as building form, color, and material and not satisfies with environment of apartments. (3) The most preferred color of Apartment is white as primary color and green as secondary color. (4) The most preferred color pattern is vertical type as facade, horizontal type as the back wall, super graphic and geometrical type as the side wall. (5) The preferred exterior images are modern, simple, and unique style.

• The Korean Journal of Food And Nutrition
• /
• 제24권4호
• /
• pp.725-731
• /
• 2011

In this study, a survey was carried out on 300 students in Korea Culinary Arts Science High School located in Gyeonggi-do from August 1 to August 30, 2011 to figure out how the control of high school students' eating behavior affects the change of their psychological achievement. Analysis showed that attitude toward eating behavior, and perceived behavior that recognize this and act, as eating habits for control of their eating behavior, are the most control factors of eating behavior. It says that the right perception of customary attitude and the correction of habits according to the exposure and performance of repetitive eating behaviors are important. Consequently, an ordinarily regular norm as a social norm, or a rule around it won't act as big positive factors.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 1997년도 한국자동제어학술회의논문집; 한국전력공사 서울연수원; 17-18 Oct. 1997
• /
• pp.1884-1887
• /
• 1997

The increasing concern over radiation exposure in the nuclear industry has fostered agrressive efforts to reduce the levels of radiation exposure. One area of the effot to reduce the radiation exposure is the development of a remote radiation monitoring system. Remote radiation monitoring can serve many benificaial functions reduce exposure to radiation by plant personnel, impruve the quality of the data that is collected and recognize the radiation environment easily. Radiation mapping system gives a good information that represents radiation level distribution. The system we have developed consists of a data acquistion parts, mobile robot and remote control parts. Data acquisition parts consist of radiation detection module and vision acquistion module which collect radiation data, visiion data and distance information. In remote control parts, the acquision data are processed and displayed. We have constructed radiation mapping image by overlaying the vision and radiation data. The radiation mapping techniques for displaying the results of the survey in an easily comprehendable form will facilitate a better understanding of the radiation environment in the facility. This system can reduce workers radiation exposure and aid to help work plan, so it has significant benifits in cost and safety.

• Journal of Agricultural Extension & Community Development
• /
• 제16권4호
• /
• pp.775-793
• /
• 2009

The objectives of the article are to identify the people's needs and opinions for rural migration and visitation, and suggest implications on policy making. In order to select respondents without bias, the parents of elementary, middle, and high school students were systematically sampled and interviewed by questionnaire. College students as a representative group of young people were also sampled and interviewed. The number of questionnaires used for analysis was 970. The results of the data analysis show that the respondents recognize rural areas are good for health, experiential tourism and rests. The demands for visiting rural areas were high especially in the ages of the 30s to 40s. The aged urban people with 50 or more had high demands for moving to rural areas. Based on the results of analysis, it was suggested that rural areas be developed by utilizing the concepts of health, experiential and resting tourism. And the convenience and attractiveness for rural visitors should be improved by considering locations and endowed resources.

• Journal of the Korean Home Economics Association
• /
• 제42권2호
• /
• pp.177-193
• /
• 2004

Using data from the 2001 Computer and Internet Use Survey by the National Statistical Office, this study investigated digital divide among women aged between 20 and 55. Following were the major findings. first, two-thirds of women did not use Internet even though many of these had Internet access at home. Second, those who did not have Internet access at home, those with a lower level of educational attainment, those with blue color or service occupations, and those with higher age were less likely to use Internet than their counterparts in these socio-economic variables. Third, expanding Internet infrastructure would not improve Internet use of the Elderly. Forth, the majority of those who did not use Internet did not recognize the Internet itself. Based on the result the policy implications for digital divide were suggested.

• Culinary science and hospitality research
• /
• 제13권1호
• /
• pp.192-203
• /
• 2007

The purpose of this study is to figure out the plans to improve business in Hotel French restaurants. This study conducts documentary study and empirical study. To achieve the purpose, a survey was conducted by 172 staffs of Hotel French restaurants in Seoul. The result of this research is as follows. Hotel restaurant operators recognize the importance of promotion and development of new sales goods. But they haven't done long-term marketing directions focusing on cost-saving and ephemeral sales promotion effects. Hotel restaurants should establish public information strategies uniformly and look for the plans that offer customers adequate information. Also, they should make a differentiation strategy within the same industry, can always give recency to customers, and enhance the event-connecting promotion menu and business activation.

• Animal Systematics, Evolution and Diversity
• /
• 제36권1호
• /
• pp.60-77
• /
• 2020

Cecidomyiidae (Diptera) consists of six subfamilies, which are divided into three groups according to larval ecological habits (phytophagous, mycophagous, and zoophagous). The five basal subfamilies of Cecidomyiidae consist entirely of mycophagous species, with approximately 1500 species described worldwide and 29 previously known to occur in Korea. In this study, 37 named species (1 Lestremiinae, 29 Micromyinae, 4 Winnertziinae, and 3 Porricondylinae species) are newly reported from South Korea. We excluded Lestremia yasukunii Shinji from the list of Korean mycophagous cecidomyiids as it is a nomen nudum. Therefore, we herein officially recognize 65 species, 30 genera, and four subfamilies for the Korean mycophagous cecidomyiid fauna. We also provide diagnoses and photographs to aid species identification and discussion on the four years of gall midge taxonomic inventory in South Korea.

• Korean Institute of Interior Design Journal
• /
• 제15권5호
• /
• pp.149-156
• /
• 2006

The Smart Home and the Home Networking industry have growth rate in 53.9% per year, and many nations appoint it as a nation's developing industry to research and invest. As KS, a standard composing smart instruments for smart home, maintain systematically in every year, and in other side construction standardization only in way to indicate, but never has national standard. Based on the Modular Coordination(MC) the framing standard of design drawing was examined in every year, and in same way for making the framing standard about Smart Home there need making a Modular Coordination(MC) at first. This investigation recognize the necessity about the modular that will be the base of architectural space which control the smart instruments. And aimed at indicating smart modular through the research about modular of the existing residence space and survey about the applicable smart technology.