• The Transactions of the Korea Information Processing Society
• /
• v.6 no.4
• /
• pp.1009-1021
• /
• 1999

This paper describes the design principles and structure of a prototype system for collaborative authoring over a wide area network. The system includes extensive support for commenting and comment review, facilities for document space navigation, and tools for controlling and monitoring work group activity, including document locking and activity recording. The operational prototype provides a testbed for the examination of human computer interaction, group interaction, group support, document structures, and the problem and the history of efforts to address it.

• The Journal of Korean Association of Computer Education
• /
• v.9 no.5
• /
• pp.53-64
• /
• 2006

This paper proposes show how to support the field-learning by using web and mobile system. This Web Mobile system is to help the users plan, carry out and evaluate a field learning. Usually the field-learning is going through three steps: preparation, actual field activity and post-evaluation activity. The proposing Web-Mobile system supports an integrated methodology to more effectively help, lead and manage this three step field-learning, This effective approach will help the learners develop their creativity, self-control and partnership to each other.

• Carbon letters
• /
• v.10 no.3
• /
• pp.213-216
• /
• 2009

The electrochemical deposition of Pt nanoparticles on carbon nanotubes (CNTs) supports and their catalytic activities for methanol electro-oxidation were investigated. Pt catalysts of 4~12 nm average crystalline size were grown on supports by potential cycling methods. Electro-plating of 12 min time by potential cycling method was sufficient to obtain small crystalline size 4.5 nm particles, showing a good electrochemical activity. The catalysts' loading contents were enhanced by increasing the deposition time. The crystalline sizes and morphology of the Pt/support catalysts were evaluated using X-ray Diffraction (XRD) and Transmission Electron Microscopy (TEM). The electrochemical behaviors of the Pt/support catalysts were investigated according to their characteristic current-potential curves in a methanol solution. In the result, the electrochemical activity increased with increased plating time, reaching the maximum at 12 min, and then decreased. The enhanced electroactivity for catalysts was correlated to the crystalline size and dispersion state of the catalysts.

• Korean Security Journal
• /
• no.1
• /
• pp.175-208
• /
• 1997

I study the actual condition and the problem of the crime prevention system of two seoul police station. that is operated on the unit of police box, and present the new improvement. Stragic and active is the new crime prevention system that introduces a concept of community oriented policing, the tendency of a developed country police. I present a medium - sized police station where 250${\sim}$300 policemen work. It consist of a patrol division, a community division and a administration support division. The chief of police bears the responsibility only for crime prevention service by concentrating on pure Patrol - centered crime prevention activity and community relation activity. Next I present a police inspector system. The most important on this paper is the community policing officer system that a policeman bears responsibility on district apart from a patrol division and support a police service related community. To be operated these systems effectively, these need to be regulated according to a police distinct, a police purpose and it's demand. Also a scale, function, authority of a existing. Police station must be regulated and the police training must be carried out.

• International Journal of Human Ecology
• /
• v.10 no.2
• /
• pp.25-37
• /
• 2009

This study investigated differences in related factors affecting life satisfaction with the elderly in or above middle class experiencing successful ageing. In the study, the respondents were 206 elderly people whose occupation (professional career) placed them in the middle and upper class range residing in metropolitan Seoul. Major results are summarized as follows: (1) In order to test gender differences, results of t-test show that there are 13 variables with seven of those being statistically significant and the rest being insignificant. (2) Needs fulfillment and physical functioning are significant factors for Korean male elders to be satisfied with their later lives. Needs fulfillment, physical functioning, group activity, and learning activity are significant factors for Korean female elders to be satisfied with their later lives.

• Journal of Digital Convergence
• /
• v.15 no.5
• /
• pp.89-98
• /
• 2017

This study aims to examine whether the life satisfaction of the elderly living alone is influenced by demographic background, economic activity, productive leisure participation and the moderating effect of social support. Data in this study was from 5th Korean Retirement Income Study, and 890 elderly living alone were extracted and analyzed, and a multi-level analysis was used to analyze the data because the life satisfaction of the elderly living alone has a random effect according to the region. The results of this study were as follows; First, the elderly living alone showed high life satisfaction when they live in province rather than Seoul or metropolitan city, spend higher living expenses, do economic activities, and they are economically independent. Second, those who participated in productive leisure activity were more satisfied with life than those who did not, and those who have social support are more satisfied with their life. Third, the relationship between productive leisure participation and life satisfaction was moderated by social support. When the elderly living alone participate in productive leisure activities, they feel more life satisfaction according to social support given to them.

• Bulletin of the Korean Chemical Society
• /
• v.33 no.5
• /
• pp.1643-1646
• /
• 2012

Three Ni-based catalysts with different clay as support were prepared and tested in the hydrogenation of maleic anhydride, among which Ni/clay1 showed best activity and selectivity. Over Ni/clay1 catalyst prepared by impregnation method, 97.14% conversion of maleic anhydride and 99.55% selectivity to succinic anhydride were obtained at $180^{\circ}C$ under a pressure of 1 MPa. Catalytic activity was greatly influenced by the temperature and weighted hourly space velocity. Catalyst deactivation studies showed that this catalyst have a long life time, the yield of MA still higher than 90% even after a reaction time of 60 h. X-ray diffraction (XRD) and $H_2$ temperature programmed reduction (TPR) were use to investigate the properties of the catalyst. XRD and TPR studies showed that Ni was present as $Ni^{2+}$ on the support, which indicated that there was no elemental nickel ($Ni^0$) and $Ni_2O_3$ in the unreduced samples. The formation of Ni was strong impact on catalytic activity.

• Journal of Korean Elementary Science Education
• /
• v.26 no.1
• /
• pp.12-23
• /
• 2007

The purpose of this study was to research the effects of students' evaluation results on teachers' teaching activities. The subjects were 431 elementary school students of 4th, 5th and 6th grade, and 14 teachers of 7 schools located in Seoul, Cheongju, and Daejeon city. The experimental design included pre and post-tests with the control group. Our results found that most of the students had positive thoughts towards science classes. In particular, activities where the teachers provided support in the conduct of experiments and the learning atmosphere generally were evaluated higher than other activities. However, unrestricted experiments were evaluated lower by the students. The feedback from the students' evaluation results of their teachers affected the teachers' teaching activities statistically. The teachers' support during experiments, unrestricted activity during experiments, and evaluation activities were changed positively following the students' feedback. However, the loaming atmosphere and unrestricted activity during experiments were observed to change negatively when the teachers were not given the students' feedback.

• Journal of the Korean housing association
• /
• v.24 no.4
• /
• pp.75-82
• /
• 2013

Being able to enjoy leisure time for adolescents is a necessary activity, for it helps them relieve their anxiety and stress and develop their potential. It is necessary to incorporate such spaces in the housing plans in advance and support diverse community activities. The current living spaces do not hold proper spaces and facilities for community activities appropriate for adolescents. Community facilities should be planned so as to reflect the needs of these adolescents, based on a clear survey in advance. The current study has conducted a survey to find out about the level of satisfaction and requests from adolescents on the leisure facilities their current living spaces hold. Based on this prior research, this study looks for solutions that could solve the issue at hand. The current community facilities are not convenient to support a diversity of leisure activities to the adolescents. The community facilities should be able to supplement information on the various activities put in place for the youth and widely supply the programs in demand. Furthermore, the adolescents wanted to form their own community within the facilities to practice their leisurely activities. We can safely assume that the youth's desire for more community amenities will increase for their own development.

• Bulletin of the Korean Chemical Society
• /
• v.26 no.4
• /
• pp.563-568
• /
• 2005

The Pt/C and Pd/C catalysts were prepared from conventional chloride precursors by adsorption or precipitation-deposition methods. Their activities for hydrogenation reactions of cyclohexene and acetophenone were compared with those of commercial catalysts. The Pt/C and Pd/C catalysts obtained from the adsorption procedure reveal higher hydrogenation activity than commercial catalysts and the catalysts prepared by the precipitation-deposition method. Their improved performances are attributed to the decreased metal crystallite sizes of Pt or Pd formed on the active carbon support upon the adsorption of the precursors probably due to the same negative charges of the chloride precursor and the carbon support. Under the preparation conditions studied, the reduction of the supported catalysts using borohydrides in liquid phase is superior to a gas phase reduction by using hydrogen in the viewpoint of particle size, hydrogenation activity and convenience.