• Journal of the Korean Society of Food Science and Nutrition
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• v.29 no.1
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• pp.64-67
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• 2000

Jellies enhancing physiological functions were prepared with using 5 and 10% dietary fiber isolated from ascidian (Halocynthia roretzi) tunic collected from recycled seafood waste. The texture development of the samples was examined with two-bite compression test and analyzed using five sorts ofrheological parameters with texture profile analysis as follows; hardness, adhesiveness, springiness, cohesiveness and gumminess. All the rheological parameters decreased in the fiber enhanced jellies. However, the springiness and cohesiveness increased slightly in the fiber enhanced jellis. Hunter L' and d' values increased in the fiber enhanced jellies and accordingly the color was light yellow. a' value showed green with the addition of fiber. As a result of sensory evaluations, the color and overall acceptability of 10% fiber enhanced jelly were significantly different at p<0.05. The 10% fiber enhanced jelly was noted as having high sensory scores and peferable acceptability.

• Journal of Digital Contents Society
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• v.14 no.1
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• pp.7-14
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• 2013

As mobiles devices with high-spec camera built in are used widely, the visual quality enhancement of the high-resolution images turns out to be one of the key capabilities of the mobile devices. Due to the limited computational resources of the mobile devices and the size of the high-resolution images, we should choose an image processing algorithm not too complex and use an efficient implementation technology. One of the simple and widely used image quality enhancement algorithms is contrast stretching. Java libraries running on a virtual machine, JNI (Java Native Interface) based native C/C++, and NEONTM SIMD (Single Instruction Multiple Data) are common implementation technologies in the case of Android smartphones. Using these three implementation technologies, we have implemented two image contrast stretching algorithms - linear and equalized, and compared the computation times. The native C/C++ and the NEONTM SIMD outperformed the native C/C++ implementation by 56-78 and 50-76 time faster respectively.

• Journal of Digital Convergence
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• v.13 no.1
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• pp.495-502
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• 2015

The main goal of psychological serious game, which is called "SAVE ME, LOVE ME" made on the purpose of sound identity for teenagers is to reach inner awareness through the process of dilemma problem solving by the support of unconditional love. This action game is about how to deal with routine dilemma through the first person narration that teenagers are faced to. Its features are on the metaphorical use of 'A Prodigal Son' in the Bible, one of religious wisdom narratives to heal the psychological stresses which teenagers suffer from. This game is aimed at helping teenagers to build a positive and solid sense of self by fighting against growing threatens to teenager's solid sense of self, by defeating monsters, and by listening to the various stories which game characters tell.

• The Transactions of the Korea Information Processing Society
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• v.4 no.8
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• pp.2092-2105
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• 1997

In this paper, we propose a load sharing scheme in distributed systems. In the proposed scheme, the state of each host is classified as a server or a source by its current load and, to prevent excessive state changes of each host, we used three threshold values for identifying the current state of each host. Based on the threshold values, some hosts, called brokers, manage the servers registered to them. The brokers, whose number is determined by the system utilization factor and the total number of hosts, support task migration processes from overloaded sources to lightly loaded servers. Also they can hand over the broker's role to another host when it is overloaded. Simulation studies were performed for examining the sensitivity of each system parameters such as threshold values, utilization factor, the number of hosts, and the number of brokers to the system performance indices including mean response time, mean queue length.

• Journal of KIISE:Computing Practices and Letters
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• v.11 no.4
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• pp.293-304
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• 2005

In this paper, we research on job migration in a grid computing environment with cactus and MPICH-C2 based on Globus. Our concepts are to perform job migration by finding the site with plenty of computational resources that would decrease execution time in a grid computing environment. The Migration Manager recovers the job from the checkpointing files and restarts the job on the migrated site. To select a migrating site, the proposed method considers system's performance index, cpu's load, network traffic to send migration job tiles and the execution time predicted on a migration site. Then it selects a site with maximal performance gains. By selecting a site with minimum migration time and minimum execution time. this approach implements a more efficient grid computing environment. The proposed method Is proved by effectively decreasing total execution time at the $K\ast{Grid}$.

• Journal of Internet Computing and Services
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• v.5 no.2
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• pp.75-84
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• 2004

Geocasting, a variant of the conventional multicasting problem, is one of communication type in which the data packets are delivered to a group of all nodes within a specified geographical region (i.e., the geocasting region) and is called location-based multicasting(LBM)(l). An Ad-hoc network is a dynamically reconfigurable and temporary wireless network where all mobile devices using batteries as energy resources cooperatively maintain network connectivity without central administration or the assistance of base stations. Consequently, the technique to efficiently consume the limited amounts of energy resources is an important problem so that the system lifetime is maximized. In this paper, we propose a LBPA(Location-Based Power Aware) geocasting algorithm that selects energy-aware neighbor to route a packet towards the target region In Ad-hoc network environments. The method Is such that the energy consumption is balanced among the nodes in proportion to their energy reserves. Through the simulations, the proposed LBPA algorithm shows better results, that is, as good as 40% on the average over the conventional LBM algorithm in terms of the network lifetime.

• Journal of Internet Computing and Services
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• v.4 no.4
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• pp.15-25
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• 2003

Wireless ad-hoc networks are only composed with mobile devices. Unlike the traditional wired networks, those devices are mostly operated with battery power. Since the battery-operated power is limited, the efficient energy resource managements becomes an important issue in wireless ad-hoc networks and various studies that considered these characteristics are progressed. One of those studies is an energy efficient routing using coordinators. In this method. only devices elected as coordinator participate in data transmissions in ad-hoc networks, while other devices remain in sleep node. The overall energy consumption of a system can be reduced. In order to minimize energy consumption of a total network, previous results try to maximize the number of nodes in sleep mode. However, minimizing the number of coordinators does not ensure to increase the system lifetime. In this thesis, we propose an algorithm that can elect coordinators with considering the amount of necessary energy to transmit assigned data and a connectivity of nodes in the networks. The result of proposed coordinator election algorithm can increase the system lifetime of an Ad-hoc network from the results of existing coordinator election algorithms.

• Korean Journal of Social Welfare Studies
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• v.49 no.1
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• pp.133-161
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• 2018

Despite the amount of government budget and resources used for female immigrants who married Korean spouses, it has not been evaluated yet whether the services designed for the immigrants are actually delivered to potential users with social needs. This study is an attempt to identify moderating factors associated with perceived needs and utilizing services of the Multicultural Family Support Centers. The National Survey on Multicultural Families 2015 is used for the analysis. Findings are as follows: the immigrant with better Korean communication skills would use the center services more when they have needs; the immigrants who lack skills were more likely to use center services in spite of the needs. Secondly, the more female spouses satisfied with their marriages, they were less likely to use the services; however, the moderating effect was not significant, On the other hand, Korean male spouses' patriarchal attitude was statistically significant. According to the results, practical and political implications were suggested.

• Journal of Soil and Groundwater Environment
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• v.23 no.2
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• pp.1-14
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• 2018

The recent increase in demand for lithium has led to the development of new brine prospects, The brines are hosted in closed salar basin aquifers of two types that are mature halite salars and immature clastic salars. Salar brines also contain other elements of commercial interest, most notably potassium and boron. As a result, there has been a plethora of new exploration projects focused on the brines hosted in the aquifers of the intermontane-closed basins. The estimate of lithium resources and reserves in these salars depends on a detailed knowledge of aquifer geometry, porosity, and brine grade. Because the resource is in a fluid state, it has the propensity to move, mix, rearrange itself relatively rapidly during the course of a project lifetime, and lower recovery factors compared with most metalliferous and industrial mineral deposits due to reliance on pumping of the brine from wells for extraction. This is unlike any other type of metallic mineral resource and hence a different approach specially focusing on hydrogeology and brine hydrology is required for these prospects.

• Journal of The Korean Association of Information Education
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• v.23 no.2
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• pp.159-167
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• 2019

Recently, a learning management system incorporating ICT technology into learning has helped students improve self-directed learning skills. Self-directed learning using LMS promotes and stimulates learners' participation in learning, focusing on the advantages of efficient use of learning resources and the spread of communication. In this study, we study the impact of self-directed learning using the learning management system on elementary school students' motivation and academic performance. We expect learners will be able to achieve effective academic achievement by learning problems that fit their level through the algorithms of the proposed learning management system. For this study, a total of 16 classes were conducted for eight weeks using the proposed learning management system for 21 elementary school students. Research has shown significant improvement in the learning orientation and interest areas of the learners who participated in the experiment.