• Journal of Science Education
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• v.33 no.1
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• pp.133-141
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• 2009

In this study, pre-service science teachers' web-based reflective journals were analyzed. During four weeks teaching practicum, they were guided to post at least two reflective journals in a week on the Web bulletin board system. Finally, 307 web-based reflective journals written by 23 pre-service teachers were selected, and the domain and the level of reflective thinking were analyzed. As a result, pre-service science teachers' reflective journals were mostly related with teaching science, i.e., preparing and reflecting their own instruction, and the frequencies of these domains increased with the process of teaching practicum. Reflective journals about school administrative system, informal teaching practice, student guidance, and personal feeling were also included. The level of reflective thinking of 179 journals about teaching science were analyzed further. There were 53 (29.6%) journals including reflective thinking, but the higher level of reflection (professional reflection and critical reflection) was rare. The perceptions of pre-service science teachers on web-based reflective journal writing were also surveyed.

• Journal of Korean society of Dental Hygiene
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• v.11 no.4
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• pp.453-464
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• 2011

Objectives : The purpose of the study is to gain some basic material for the improvement of dental clinics' homepages through a survey investigation, in which college students of Dental Hygiene Departments and Dental Hygienists in Kwangju and Cheollanamdo Province Methods : It conducted the self-reported questionnaire survey on the Recognition Degrees of the Dental Clinics' Homepages from May 26, 2010 to October 19 targeting 240 dental hygienists who are working for dental offices and 638 college students of Dental Hygiene Departments. Results : 1. It was asked whether they have visited dental homepages for the recent one year; 'yes' answers occupied 68.1%, double than 'no' answers. 2. It was asked how much they know services provided in dental homepages; The more respondents correctly answered that there exist all these services like general information service, visitor's book and bulletin board service, reservation service, dental information service, counseling service, and visual service. 3. All the respondents answered that the homepage of each dental clinic is closely related with the image of the clinic : freshmen showed 3.84, sophomore showed 4.03, juniors showed 4.03, and dental hygienists showed 3.88. 4. It was asked how much they know services provided in dental homepages; Are there the homepages for dental hygienists? Many of them answered that IT experts or businesses are managing the homepages in the technical respect(38.4%) and their use and general administration mainly belongs to dental hygienists(46.2%). Conclusions : It is necessary that through the studies of dental hygienists' interest and understanding on dental homepages we have to seek the development orientation of the technical management and the way of using them, and furthermore we have to know the thoughts of patients on dental homepages, who are users of the dental informations, and find the ways of improving medical services which the patients want.

• The Bulletin of The Korean Astronomical Society
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• v.43 no.2
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• pp.49.3-50
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• 2018

Korea has kept its records of astronomical phenomena since around 2,000 years ago. However, the contents and scope of relevant service have been limited for researchers who need those records due to lack of complete data collection. In this regard, it is necessary to establish efficient collection and management systems of Korean astronomical records by utilizing an environment that is easily accessible. This study is intended to complete the development of a testbed system that allows researchers to systematically input and validate, in a Web environment, multiple astronomical records among the historical documents until Modern Joseon after the Three Kingdoms Period. Recognition of the pre-translated data and tables in advance is followed by its storage in the database built on the Web. Then, data validation is implemented by providing a retrieval service according to a specific form to only a finite number of researchers who have access authority. This study is targeted at a testbed system that takes around three months to be completely developed. The completed testbed system is expected to allow internal and external researchers of an organization to easily access the service on the Web. This will ensure that the accuracy of the data can be verified mutually and help identify areas of service improvement. The opinions collected regarding service improvement will be reflected in the future system. Eventually, domestic astronomical records will subsequently be able to be utilized internationally through the multilingual service.

• Bulletin of the Korean Space Science Society
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• 2011.04a
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• pp.21.4-22
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• 2011

IVS (International VLBI Service for Geodesy and Astrometry) 통합분석센터는 개별 IVS 분석센터의 산출물을 통합하고 그 결과물을 IERS (International Earth Rotation and Reference Systems Service)에 제공하여 국제 지구기준좌표계를 구축하고 지구회전파라미터를 결정하는데 핵심적인 역할을 한다. 한국천문연구원(KASI)은 2008년 10월 IVS 통합분석센터로 선정되어 현재 통합 분석 시스템을 구축하고 있다. 정규운영에 앞서 통합용 분석 소프트웨어를 정비하고, KASI 통합분석센터의 통합해를 타 IVS 통합분석센터 통합해와 비교 검증하는 것은 필수적이다. 이 연구에서는 통합분석처리를 위해서 GPS 자료처리 소프트웨어인 Bernese 5.0을 IVS 산출물 형식에 맞추어 수정 보완한 후 활용한다. 이 발표에서는 1984년부터 현재까지의 IVS 분석센터의 장기간 산출물을 수집하고 Bernese 5.0을 이용하여 지구회전파라미터(X-극, Y-극, UT1-UTC와 각각의 시간변화율)의 통합해를 산출한 결과를 소개한다. 또한, 타 IVS 통합분석센터의 통합해와 비교 검증결과를 논한다.

• Bulletin of Food Technology
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• v.21 no.2
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• pp.73-76
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• 2008

• Bulletin of the Korean Chemical Society
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• v.32 no.4
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• pp.1387-1390
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• 2011

• Bulletin of the Korean Mathematical Society
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• v.52 no.1
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• pp.1-11
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• 2015

This paper is devoted to investigate the singular directions of meromorphic functions in some angular domains. We will confirm the existence of Hayman T directions in some angular domains. This is a continuous work of Yang [8] and Zheng [10].

• Bulletin of the Korean Mathematical Society
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• v.47 no.6
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• pp.1251-1258
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• 2010

For an M/G/1 processor-sharing queue with batch arrivals, Avrachenkov et al. [1] conjectured that the conditional mean sojourn time is concave. However, Kim and Kim [5] showed that this conjecture is not true in general. In this paper, we show that this conjecture is true if the service times have a hyperexponential distribution.

• Bulletin of the Korean Mathematical Society
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• v.53 no.4
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• pp.985-1004
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• 2016

We consider the MAP/PH/c/K queue in which blocked customers retry to get service and servers may take vacations. The time interval between retrials and vacation times are of phase type (PH) distributions. Using the method of mean drift, a sufficient condition of ergodicity is provided. A condition for the system to be unstable is also given by the stochastic comparison method.

• The Bulletin of The Korean Astronomical Society
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• v.36 no.2
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• pp.66.1-66.1
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• 2011

E+A galaxies are interpreted as post-starburst systems because of strong Balmer absorption lines but any emission lines indicating the lack of current star formation activities, thus they are one of key populations for understanding how star formation activities evolve in galaxies. We present mid-infrared (MIR) spectral energy distributions of E+A galaxies using the Wide-field Infrared Survey Explorer (WISE) preliminary released data. Furthermore, we investigate the role of environment with respect to the MIR properties of E+A galaxies.