• Korean Journal of Optics and Photonics
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• v.21 no.2
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• pp.61-68
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• 2010

Optical simulation methods were applied to the edge-lit LED backlight for LCD TV applications in order to optimize the optical structure of the light guide plate(LGP), and thus to improve the uniformity properties by removing the bright spots caused by LED's. The edge-lit LED backlight consisted of three white LED's with a lamp cover, a light guide plate, and a reflection film. When there was no pattern on the entrance side surface of the LGP, the illuminance uniformity was sensitively dependent on the distance d between the LED and the entrance surface. The illuminance uniformity increased with d but its increasing rate slowed down when d was beyond ~ 1.5 mm. When micro-patterns such as a lenticular lens array (LLA) or a serration pattern were formed on the entrance surface, the illuminance uniformity was improved substantially even for the case of very small d. At the same simulation condition, the lightguide with serration pattern showed a better uniformity than that with LLA pattern. Additional improvement could be achieved by changing the refractive index of the micro-patterns. These results suggest that using micro-patterns is a very effective way to reduce the bright spots due to their refracting function for the concentrated incident rays onto the LGP.

• The Journal of the Convergence on Culture Technology
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• v.8 no.6
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• pp.141-147
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• 2022

Care farm recently has been introduced as social farm and green care centered on Europe, and has been developing rapidly in the last 20 years. Although it is being introduced gradually in Korea, it is still only at the beginning level, and it does not provide a guide for systematic farm owners' model and operation of the Care farm. In Care farm, advanced countries are making it possible to operate a more common care farm by providing a systematic national guide. By reviewing the literature of these guidelines in advanced countries, the contents are organized to help compose the guidelines for domestic care farm. In Canada, Ireland, the Netherlands, Norway and Finland, the contents of the guidelines for care farm by country can be broadly divided into general matters, how to start a care farm project for farm owners, understanding of target audience, farm organization system, farm management, and farm life. As the demand for care farms increases in Korea as well, guidelines for farm owners should be disseminated to facilitate access to care farms. It is also considered a good way to make a guide by combining it with the medical field, and it seems that it is necessary for the farmer to understand the medical field to some extent.

• Journal of Industrial Convergence
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• v.19 no.1
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• pp.53-63
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• 2021

As tourists travel to other regions, they encounter numerous facts that conflict with their views. At that time, we change our view of coping with life. In this respect, tourism is a new way of learning. As a new learning method, tourism experience research is a new approach. In this study, the relationship between experience and learning experienced in tourist destinations was analyzed by applying the activity theory. The analysis units applied in the activity theory were set as subjects, goals, communities, roles, methods and rules, outcomes, and relevance to local communities. Based on this, in-depth interviews were conducted with commentators and guides who had a great influence on the tourism experience to analyze the learning process of tourists. As a result of the analysis, the experiences of tourists during the tour were interactive in various forms within the unit as well as the unit of the activity system of the commentator and guide. This interaction induces changes in the tourism experience activity system, enabling tourists to learn. The content is that the value of learning increases as the role of guide and commentator increases, that the social and cultural dimension of tourism experience is included in the learning effect, and the contradictions that arise from interactions within or between activity systems. The fact that they find the solution process themselves, and that tourism activity is not an isolated unit, but exists at the intersection of hierarchies and networks, is affected by the activities and environments of others.

• International Journal of Highway Engineering
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• v.13 no.1
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• pp.33-40
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• 2011

The resilient modulus which is presented mechanical properties of compacted subbase material is the design parameter on the Mechanistic - Empirical pavement design guide. The compaction control method on the Mechanistic - Empirical pavement design guide will be the way to confirm whether the in-situ elastic modulus measured after the compaction meets the resilient modulus which is applied the design. The resilient modulus in this study is calculated by the neural network suggested by Korea Pavement Research Program, and degree of compaction as the existing compaction control test and plate bearing capacity test(PBT) was performed to confirm whether the in-situ elastic modulus is measured. The Light Falling Weight Deflectometer(LFWD) is additionally tested for correlation analysis between each in-situ elastic modulus and resilient modulus, and is proposed correlation equation and test interval which can reduced overall testing cost. Also, the subbase compaction control procedure based on the in-situ elastic modulus is proposed using the in-situ PBT and LFWD test result.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.13 no.1
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• pp.1-7
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• 2020

Directivity control technology of sound system is a key technology for improving sound quality. Providing a line source rather than a point source in an acoustic system can reduce the effects of attenuation interference at long distances, thereby providing high quality sound. In particular, A line-array speaker system can be used to provide coherent, high-quality sound over long distances. However, high frequencies have shorter wavelengths, so the distance between the speakers of a line array system must be shorter, but there are physical limitations. In this paper, we designed a wave guide and installed it in the speaker's compression driver to solve this problem. We measured and tested various acoustic characteristics to verify the performance of the speaker. As a result, when the line array sound system is constructed using the developed speakers, it is possible to provide a line source in all areas including the treble range, thereby achieving the same effect as a single extended source and providing high quality sound up to far distances.

• Journal of Korean Home Economics Education Association
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• v.22 no.2
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• pp.1-13
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• 2010

This study was planned to provide basic information to help teachers guide lookism-prone students in their home and school life, and to guide them in the unit relating to clothing in school curriculums. To carry out this experiment questionnaires were administered to 481 students in their first and second year in middle and high schools in Gwangju city. The questionnaires are composed of 3 themes; 'general matters', 'attitudes about and recognition of appearance management' and 'school adaptation'. The collected data was analyzed with Component analysis(Varimax rotation) and Cronbach's ${\alpha}$, T-test, one-way ANOVA, Duncan-test, Pearson's correlation analysis and multiple regression analysis using the SPSS WIN 14.0(Kr). The results of this study were as follows; 1. The more they managed their behavior relating to appearance and cleanliness, the better they felt their friendships. 2. The less they concentrated management relating to appearance, the better they felt about their relationships with their teachers. 3. The less they concentrated management relating to appearance but the more they managed cleanliness the easier they adjusted to school rules. 4. The less they pursued a trendy appearance but the more they managed cleanliness, the better they studied.

• Journal of Digital Convergence
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• v.17 no.1
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• pp.37-42
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• 2019

This study investigated the policies of return to farm & rural of the local government 's local communities. Through this, we intend to provide information for the successful establishment of the policies of the local village. The local economy is difficult due to the declining population. Therefore, it is also important as a way to increase the population. It is also important as a way to revitalize agriculture. The results of this study are as follows. The main factors are education, self-sufficiency, adaptation, funding, and consulting. In addition, the importance of these was highest in the self-supporting environment (28%). Followed by adaptation (21%) and funding (20%). Followed by consulting (17%) and education (15%). We can conclude that the factors that show a somewhat lower proportion are less important, but we can also conclude that the importance of the factors is high due to the high maturity of the factors. The importance analysis used AHP technique. The results of this study can be a guide for government policy.

• The Research Journal of the Costume Culture
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• v.6 no.4
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• pp.26-38
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• 1998

This paper is based on a survey of consumers 'opinions on underwears. The questions in the survey dealt with what materials were used to manufacture underwears, which underwears were worn together in combinations, and how comfortable underwears were. In addition, the respondents were asked about how many pieces of different underwears they posses. Through such research, this paper aims to provide a guide to manufacturing domestic underwears that are competitive against foreign bands. 336 women in their twenties, thirties, forties and fifties from Seoul and it's suburbs were surveyed. Statistical analysis was performed by calculating the average, frequency and standard deviation, and through one-way analysis and the Duncan test. The following are the results of the study : 1. Consumers were moderately satisfied with Korean-made underwears. In order to complete with foreign brands, products with high consumer-satisfaction levels must be produced. 2. Upper garments usually consisted of brassieres with shoulder straps and sleeveless shirts. For lower underwears, most people tended to wear panties under girdle, with garlets on top. This is most likely the resut of more people wearing slacks than skirts. 3. Consumer in their twenties had anaverage of 1.71 slips, while those in their thirties had 3.07, those in their forties and 3.25, and people in their fifties had 3.88 slips. Thus the number of slips a consumer possesses increases as age increases. for socks, people in their twenties had 7.4 pairs on average, those in their thirties had 5.5, those in their forties had 6.7, and those in their fifties had 5.3. Thus, those in their twenties possessed the most number of socks. Consumers in their twenties also had the largest proportion of socks among all the types of hosiery combined, with 47.1% of their hosiery being socks. 4. Consumers did tend to prefer cotton underwears, but according to the type of underwears, producting using mixed fabrics of cotton and synthetic fibers were also frequently worn. 5. The shape and form of underwear that consumers prefer in a ceratin time frame varies according to the latest fashion in outer wear. Therefore, planning design of underwear products by predicting the future trend of outer wear fashion is necessary.

• Journal of Korean Library and Information Science Society
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• v.45 no.4
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• pp.185-205
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• 2014

This study investigated IRA's 3 standards related to reading instruction and examined the value which can be meaningful to Korean situation. IRA divided reading educators into 7 types and proposed each detailed professional standard through the 'Standards for reading professionals'. The next standard called 'Standards for the English language art' described their direction and content for English language education including reading instruction. The 'Standards for the assessment of reading and writing' aims at the basis to evaluate students' reading ability. The value found through these standards is as follow: IRA's reading professionals standard can be a useful way to define the type of reading educator in Korea. A reading instruction standard like IRA's language art standard can guide reading instruction of Korean libraries in a more systemic and consistent way. A valid evaluation standard to measure students' reading ability can show the possibilities to define the students who struggle with reading and to provide more suitable instruction for them.

• Journal of Korean Library and Information Science Society
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• v.26
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• pp.261-290
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• 1997

98 wise sayings on the nature of book are collected from various books and analyzed in their meanings. The results of analyzing them are as follows: A book is a good friend, teacher, doctor, and guide of life. A book is an implement of enhancing man s culture and a vehicle of civilization. A book makes man find his own self and shows his way of life. A book has its own life, develops it, and doesn't lose its life, but its destination depends on its reader. Great books make man know, dominate, civilize the world. Good books are not easy to come in contact with, but immortal and life-long as a good friend. Bad books are not difficult to come in contact with, but poisonous and dull. You can judge a man by the book he reads. A book to be of help is to make man think. Great books make man begin his new life. Nationalities occupations, and periods of activity of the authors who said wise sayings are investigated and analyzed. First, the nationalities of the authors are such advanced countries with high culture as England(41%), France(21%), America(19%), Germany(5%) and Rome(5%). Secondary, their occupations are as follows : a man of letters(62%), philosopher(13%), politician(5%), and churchman(4%), and especially poet forms 32% of men of letters. Thirdly, their activity periods are mainly 19C-20C and the period form 38% of the whole.