• Research in Mathematical Education
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• v.7 no.4
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• pp.211-222
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• 2003

Recursive thinking is iterative, self-referential, and building on itself continuously. Moreover, it is becoming a more prominent feature of the mathematical scope because of the availability of computers and languages like Logo, Excel, and Pascal that support recursion. This study investigates the way to create students' recursive thinking in mathematics classroom and to use various methods to solve problems using a spreadsheet, the Excel program where technology could be accessible.

• Korean Journal of Community Nutrition
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• v.17 no.1
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• pp.91-100
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• 2012

This study aimed to evaluate the effectiveness of the foodservice management support program focusing on menu management in community child centers. The support program provided reference menus, staff training, and field consulting to 10 community child centers in the Jeollanam-do province for one month, August in 2010. One month menus were developed, based on children's preference for menu items, foodservice personnel's preference for food materials, and availability of local specialty foods, and offered as reference menus. In addition, staff training and field consulting focusing on menu management were conducted before and during the pilot period, respectively. To evaluate the support program, menus, foodservice personnel's knowledge level and perceived performance in foodservice management, and children's level of satisfaction for foodservice were analyzed before and after the support program. As a result of analysis of 222 and 210 menus of before and after the support program, respectively, the number of dishes per meal increased from five to six on average, and the proportion of meals including five food groups, which were grain, meat, vegetable, fruit, and milk and dairy product, rose from 2% to 24%. Foodservice personnel's knowledge level regarding foodservice management increased significantly (p = 0.007), however, their perceived performance in foodservice management did not show any significant changes. Children were more satisfied with 'food' (p = 0.001), 'sanitation' (p = 0.001), and 'environment' (p < 0.008) of foodservice in community child centers after the support program. In conclusion, the foodservice management support program focusing on menu management in this study was effective for improving menu quality of and children's satisfaction with foodservice in community child centers.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.9
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• pp.315-322
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• 2019

Recently, the Marine Corps of South Korea started to introduce and possess its own weapon systems. On the other hand, the level of maintenance is lower than that of other military forces, and depending on the other military forces, maintenance occurs intermittently when transporting weapons systems. In this case, unmanned vehicles can be used to reduce the cost, manpower, time, and risk of carrying weapons systems. In addition, the transport of weapon systems between islands or between an island and inland of the Marine Corps using unmanned vehicles is easier in terms of the maintenance level and surrounding environment than other military forces. This paper compares the improvement of operational availability and cost of spare parts in terms of logistics support when using unmanned vehicles in the West Sea area, and quantitatively show the efficiency and usability of the weapon system. To compare operational availability and costs for spare parts, a simulation was performed based on the OO weapons system between islands or between an island and inland, and the results were compared and analyzed.

• Journal of the military operations research society of Korea
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• v.16 no.1
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• pp.113-129
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• 1990

This paper presents the simulation model to decide the mean size of cannibalization aircraft (MSCA) under steady state when an airbase makes use of cannibalization to support the spare parts of an airfleet. In this model, the essential factors such as mission requirements, mission time, failure time, repair time, repair capability, inventory policy, cannivalization rule are considered. The model is constructed with above factors and actual airbase operating rules for a basis. Because of the tangled interdependencies among the each factors, it is inevitable to construct the model by the simulation technique. The mission and support system of the airbase is considered as a closed queueing network with a finite number of unit The troubled aircrafts are repaired in accordance with the priorities that are determined by their repair times. The illustrative example of the model, using the actual data of xx-airbase, is presented. The model would be a useful tool not only to determine the MSCA and the size of scheduled maintenance aircraft but to evaluate the NORS (not operationally ready supply) rate and the availability of an airfleet.

• 재활복지
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• v.21 no.1
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• pp.47-70
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• 2017

The aim of this study was to explore the effects of the epidemiological factor (depression), the behavioral factor (activities of daily living), the predisposing factor (self-efficacy), reinforcing factors (family support, professional support), and enabling factor (resource availability, accessibility) on quality of life in home-dwelling disabled people in rural areas. The conceptual model for this study was established on the basis of the PRECEDE model which was developed by Green and Kreuter. Data were drawn from the "Preliminary Investigation for Community-centered rehabilitation" conducted by a public health center located in the O province in 2011 and 186 of 190 disabled people who participated in the survey were included in the final analysis. Data were analyzed using Direct effects on quality of life arose from latent variables depicting the epidemiological factor (depression)and reinforcing factor (family support, professional support), while indirect effects arose from the behavioral factor (activities of daily living), the predisposing factor (self-efficacy), and enabling support (resource availability, accessibility). This model explained 85.5% of the variance in quality of life among rural disabled individuals. These findings may have shed some light on the necessity of including strategies to reduce depression and to strengthen supports from family and healthcare professionals when performing rehabilitation programs to improve quality of life in home-dwelling disabled people in rural areas. Furthermore, it suggested that it would be useful to develop specific strategies and tactics which might increase self-efficacy and to expand linkages between public health centers and other professional institutions such as hospitals for community-centered rehabilitation services for individuals with disabilities.

• The Transactions of the Korea Information Processing Society
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• v.6 no.11S
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• pp.3340-3349
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• 1999

Supporting object group on distributed object system give merits such as load balancing, fault tolerance and high availability. In this paper, we describe a CORBA ORB that has been designed to support object group based on active replication. The ORB supports the operational model in which it uses the IIOP for communication between client and server and total ordered multicast protocol for consistency control among group members. And through extension of ORB, it provides functions required for support of object group. Since it provides transparency of object replication, the ORB is interoperable with the existing CORBA products. It make possible for existing server application to be easily extended to application supporting object group as adding interface functions which should be used for building applications is minimized. A prototype is implemented, and performance of the replicated object group is tested and compared with a single object invocation.

• Journal of Astronomy and Space Sciences
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• v.30 no.4
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• pp.255-267
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• 2013

In this research, the ground contact opportunity for the fictitious low lunar orbiter is analyzed to prepare for a future Korean lunar orbiter mission. The ground contact opportunity is basically derived from geometrical relations between the typical ground stations at the Earth, the relative positions of the Earth and Moon, and finally, the lunar orbiter itself. Both the cut-off angle and the orbiter's Line of Sight (LOS) conditions (weather orbiter is located at near or far side of the Moon seen from the Earth) are considered to determine the ground contact opportunities. Four KOMPSAT Ground Stations (KGSs) are assumed to be Korea's future Near Earth Networks (NENs) to support lunar missions, and world-wide separated Deep Space Networks (DSNs) are also included during the contact availability analysis. As a result, it is concluded that about 138 times of contact will be made between the orbiter and the Daejeon station during 27.3 days of prediction time span. If these contact times are converted into contact duration, the duration is found to be about 8.55 days, about 31.31% of 27.3 days. It is discovered that selected four KGSs cannot provide continuous tracking of the lunar orbiter, meaning that international collaboration is necessary to track Korea's future lunar orbiter effectively. Possible combinations of world-wide separated DSNs are also suggested to compensate for the lack of contact availability with only four KGSs, as with primary and backup station concepts. The provided algorithm can be easily modified to support any type of orbit around the Moon, and therefore, the presented results could aid further progress in the design field of Korea's lunar orbiter missions.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.9
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• pp.5726-5737
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• 2014

The increasing importance of software has highlighted the need for the proper application of software ILS. On the other hand, the development of ILS has been somewhat limited to the area of hardware development. Therefore, this study examined the potential difficulties in applying software ILS to practical uses, and analyzed the drawbacks by reporting several domestic or foreign regulation cases. In addition, the differences between hardware and software ILS were examined by considering their characteristics of maintenance. Eventually, by establishing the proper range, this study proposes a development plan that is suitable for domestic weapon systems. The proposed research is expected to be helpful for offering specific plans for designing software ILS.

• The Journal of the Korea Contents Association
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• v.19 no.12
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• pp.101-112
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• 2019

The purpose of this study is to examine the availability of family-friendly systems for female workers with children under elementary school, and to verify that the availability of family-friendly systems can mitigate the negative effects of workplace-home conflicts on family and work-life satisfaction. To this end, data of 538 female employees with children younger than elementary school students were analyzed using the sixth data of the Korean Women Manager Panel. According to the analysis, the type of family-friendly system such as time flexibility system, career flexibility system, and worker support system all showed significant adjustment effect in relation to workplace-family conflict and work life satisfaction. The career flexibility system was the only one that showed a control effect on family life satisfaction. To help talented female workers work for their children without severing their careers, the government proposed active support for businesses and the government to help them use the family-friendly system.

• The Korean Journal of Health Service Management
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• v.6 no.1
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• pp.195-203
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• 2012

The purpose of this study was to identify clinical practice (clinical training education) and satisfaction depend on university hospital availability according to a survey with 850 healthcare-affiliated students. The collected data were analyzed with the SPSS17.0 program. The result was shown statistically significant difference depends on gender, major departments and satisfaction of college life. In addition, there were significant differences in satisfaction of clinical training education in the environmental aspects of practice depending on whether affiliated hospital or not. There were no significant correlation found between degree of satisfaction of clinical training education and the need for affiliated hospital (r = .204, p <.01). As a result, Attached to the university hospital can be helpful to healthcare-affiliated students on environmental and educational aspects of clinical training education. Therefore, the effective and practical training programs using university-affiliated hospitals are surely needed to develop and to apply the active support.