• Journal of the Korean Society for information Management
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• v.31 no.4
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• pp.161-178
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• 2014

Recently, many information services allow users to collaborate to produce and use information. Sharing information is also important for users who have similar taste or interest. As various channels are available for users to share their experiences and knowledge, users' data have also been accumulated within the information services. This study collected movie lists made by users of IMDB service. Co-word analysis and ego-centered network analysis were adapted to discover relevant information for users who chose a specific movie. Three factors of movies including movie title, director and genre were used to present related movie information. Movie title is an effective feature to present related movies with various aspects such as theme or characters and the popularity of directors affects on identifying related directors. Genre is not useful to find related movies due to the complexity in the topic of a movie.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.29 no.10B
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• pp.831-840
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• 2004

Providing quality of service (QoS) guarantees over wireless link requires thorough understanding and quantification of the interactions among the traffic source, the wireless channel, and the underlying error control mechanisms. In this paper, we account for such interactions in a network-layer model that we use to investigate the delay performance of a wireless channel. We consider a single ON/OFF traffic stream transported over a wireless link. The capacity of this link fluctuates according to a fluid version of Gilbert-Elliot's model. We derive the packet delay distribution via two different approaches: uniformization and Laplace transform. Numerical aspects of both approaches are compared. The delay distribution is further used to quantify the wireless effective bandwidth under a given delay guarantee. Numerical results and simulations are used to verify the adequacy of our analysis and to study the impact of error control and bandwidth allocation on the packet delay performance. Wireless networks, QoS, delay distribution, fluid analysis.

• Information and Communications Magazine
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• v.11 no.6
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• pp.37-54
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• 1994

Technical innovation on multimedia data processing brings us new multimedia services. Multimedia services are classified into five groups : TVs, computers, telecommunications, periperals, and softwares. This paper surveys on the services in various aspects and, in particular, computer areas are discussed in detail. To provide the services, major subsystems such as highspeed networks, operating systems, intelligent agent based user interfaces are discussed. In particular, multimedia operating systems are the most actively investigating research area as an infrastructure of multimedia computer systems to provide integrated multimedia services. So, the trends of new multimedia operating systems are analyzed and COSMOS (Collaborative Object Sharing for Multimedia Operating System) multimedia group presentation is discussed. The characteristics, model and abstract data structure of COSMOS is described. The performance analysis of 3 person conference system using audio, video and shared graphic editor on COSMOS shows that taking integrated multimedia operating system approach leads changing of new multimedia service environments.

• Journal of Fashion Business
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• v.14 no.5
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• pp.195-215
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• 2010

The emergence of the luxury market has led numerous academic researchers, as well as marketers in the luxury market, to pay attention to both identifying luxury brand features and measuring perceptions toward luxury brands. Especially, Korea is a significant emerging market for luxury goods. Young consumers and male consumers are getting into the luxury market fast and these new segments will keep increasing. There are only a few studies related to distinctive definitions of luxury brands and measurement development for the Korean market. However, there are some limitations in these previous studies in that they did not capture the nature of luxury due to their inappropriate of subjects and approach in data collection and to lack of a perspective of Korean specific features. Thus, the purpose of this research is to identify Korean consumers' perceptions toward luxury products and, ultimately, to develop a reliable and valid measurement items for the luxury products' features for the Korean market. Defining the three high constructs(functional, emotional, and symbolic aspects) as a key needs and benefits on luxury brands, we looked at four stages of development for generating and deducting items by luxury industry experts and luxury consumers, as well as for testing measures by 20th~60th consumers. As a result, this study confirmed that luxury brands consists of high quality, high price, unique design, and luxury store; the emotional aspect construct combines craftsmanship, VIP service, and high social status; and the symbolic construct includes brand heritage and being a well-known brand. Finally, 22 measurement items (Measures of Luxury Brand for Korea: LBK) were developed for the conceptual features for luxury brands from a Korean perspective. This study provided understanding of Korean consumers' perceptions toward luxury brands from an academic perspective. For the managerial implication of this study, LBK can be utilized to judge both luxury brands and mass brands, to diagnose current a brand's luxuriousness, from the customer's point-of-view, and, finally, to measure a Key Performance Index (KPI) of luxury brand companies.

• The Plant Pathology Journal
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• v.32 no.6
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• pp.489-499
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• 2016

Green shoot cuttings of 10 different grapevine species were inoculated with Agrobacterium vitis to find disease-related metabolites in the grapevine. Crown galls formed 60 days after inoculation varied in gall severity (GS) evaluated by gall incidence (GI) and gall diameter (GD), which were classified into three response types as RR (low GI and small GD), SR (high GI and small GD), and SS (high GI and large GD), corresponding to resistant, moderately resistant, and susceptible responses, respectively. In this, 4, 4, and 2 Vitis species were classified into RR, SR, and SS, respectively. Gas chromatography mass spectrometry (GC-MS) analysis of the grapevine stem metabolites with A. vitis infection showed 134 metabolites in various compound classes critically occurred, which were differentially clustered with the response types by the principal component analysis. Multivariate analysis of the metabolite profile revealed that 11 metabolites increased significantly in relation to the response types, mostly at post-inoculation stages, more prevalently (8 metabolites) at two days after inoculation than other stages, and more related to SS (7 metabolites) than RR (3 metabolites) or SR (one metabolite). This suggests most of the disease-related metabolites may be rarely pre-existing but mostly induced by pathogen infection largely for facilitating gall development except stilbene compound resveratrol, a phytoalexin that may be involved in the resistance response. All of these aspects may be used for the selection of resistant grapevine cultivars and their rootstocks for the control of the crown gall disease of the grapevine.

• Journal of Internet Computing and Services
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• v.14 no.5
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• pp.39-48
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• 2013

A cloud system has to deal with highly variable workloads resulting from dynamic usage patterns in order to keep the QoS within the predefined SLA. Aside from the aspects regarding services, another emerging concern is to keep the energy consumption at a minimum. This requires the cloud providers to consider energy and performance trade-off when allocating virtualized resources in cloud data centers. In this paper, we propose a resource provisioning approach based on dynamic thresholds to detect the workload level of the host machines. The VM selection policy uses utilization data to choose a VM for migration, while the VM allocation policy designates VMs to a host based on its service reputation. We evaluated our work through simulations and results show that our work outperforms non-power aware methods that don't support migration as well as those based on static thresholds and random selection policy.

• Journal of the Korean Society for Library and Information Science
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• v.33 no.2
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• pp.69-88
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• 1999

Despite the continuous development and provisions of state public library standards there has been little research about how useful they are for what aspects of public library activities The purposes of the present study are 1) to understand, from the directors points of view the utility of state standards for planning and evaluation: and 2) to explore the types of factors, related to the directors' backgrounds and/or the library planning and evaluation contexts associated with the directors perceptions. Through a self-administered mail questionnaire, 1,198 public library directors in Kansas Texas and Wisconsin were surveyed. and 737 directors replied ($61.5\%$ response rate). The directors perceived the standards useful for both planning and evaluation. Public library directors viewed the collection and service standards as more useful than administration, staffing and facilities standards. Library size and community involvement were associated with the directors perceptions, yet the directors professional background, was not significantly related to his or her perceptions. The findings suggest that public library directors perceptions of the utility of state standards need to be understood within the library condition and Its community context. and the emphasis on community based public library planning and evaluation should continue to be employed in the standards.

• Health Policy and Management
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• v.11 no.1
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• pp.131-152
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• 2001

Public health system and public health practice have changed over the past decades as the result of social and epidemiologic changes. New public health concept emphasizes leadership, strategical thinking, systematic planning and effective performance to identify and solve complex health problem In Korea, the role of Health Center has been expanded rapidly. However there is strong suspicion that Health Center can achieve their mission. This paper aims at understanding what is the needed functions of Health Center and which of its aspects needs improvement. The main results of this study are summarizes as follows. District Health Law does not address the core functions of Health Center. The staffs of Health Center have difficulties in prioritizing their services. The recent attempt to restructure Health Center and change delivery pattern of public health services ended with only limited success. To effectively confront threats to the public's health, the three major function of Health Center must be ${\circled}1$ modifying individual behavior and lifestyle, ${\circled}2$ improving social and economic conditions, and ${\circled}3$ reforming health policies. Better results do not come from setting new functions only; they come from understanding and improving the processes that will then leads to better outcome. We recommend that policy-makers focus economic evaluation of public health programs, building and spreading of the scientific evidence of programs, linkage of public health research and public health program. The criteria of delegation of public health service to private sector is urgently needed. Making community health information data available on a routine basis to providers, managers and researchers of public health services helps promote the efficiency of the overall operation of public health system.

• Journal of the Korean Society of Food Culture
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• v.30 no.4
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• pp.387-394
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• 2015

This study investigated the effect of cooking class on improvement of eating behaviors and satisfaction with cooking activities in children. The questionnaires developed for this study were distributed to 380 mothers during June to August, 2011. A total of 286 questionnaires were used for analysis (81.7%), and frequency analysis, ANOVA, and ${\chi}^2$-test were completed using SPSS (version 14.0) software. The children with cooking experience (52.7%) showed more improvement of eating habits than children with no cooking experience (36.4%). Both types of children showed an 'unbalanced diet' with respect to eating habits. The overall satisfaction level was an average of $3.84{\pm}0.62$. The effects after cooking activities varied for different aspects of improvement of eating habits: 'Correcting unbalanced diet' was $4.26{\pm}0.66$, 'nutrition knowledge' was $4.06{\pm}0.70$, 'dining etiquette' was $4.09{\pm}0.63$, and 'regular meals' was $4.15{\pm}0.73$. There was a significant difference between genders with regards to correcting unbalanced diet with vegetables (p<0.01). Ages from 10 to 12 were able to improve unbalanced diet with 'grains' (p<0.001), while 'Kimchi' (p<0.05) and 'paste' for ages from 10 to 12. In conclusion, cooking activities are regarded as effective in correcting unbalanced diet and eliciting positive changes in eating behavior.

• Journal of the Korean Society of Food Culture
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• v.20 no.5
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• pp.499-507
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• 2005

The purpose of this study is to draw attention to the distinction of Korean food as well as to find ways to universalize Korean food. Not only does Korean food a big part of representing the Korean culture itself, the ingredients in the Korean food are extremely nutritious. The excellence in the ingredients has been verified through scientific studies over and over. Today, this is recognized widely by the food experts in the U.S. This study also points out some of the hurdles in universalizing Korean food. First of all, many people around the world are not aware of the positive aspects of the Korean food. There have been minimal efforts, if at all, to find ways to make fusion Korean food to be part of a world cuisine. The lack of research and development in the Korean food industry also does not help the situation much. Lastly, the limited knowledge of the actual people working in the food service sector regarding Korean food hinders the Korean food going universal. Currently, the food industry in the U.S. is quite favorable for Korean food to enter its markets to become part of the American cuisine. The Americans' appetite continues to change towards more healthy living leaning them naturally towards Asian food. For Korean food to become part of the American cuisine, the follow recommendations are given in the study: 1) Korean food must be localized, become a fusion cuisine; 2) standardize the cooking method; 3) change the focus to rice-centered trend food; 4) foster more Korean food experts; and, 5) promotion of strengthening food advertisements while increasing research and development. It is also important during this whole process, traditional Korean food be discovered and implemented to the overall food program in universalizing Korean food.