• Proceedings of the Korea Concrete Institute Conference
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• 1999.10a
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• pp.179-182
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• 1999

A protections from the frost damage at early ages is one of the serious problems to be considered in cold weather concreting. Frost damage at early ages brings about the harmful influences on the concrete structures such surface cracks and the loss of strength. Therefore, in this paper, the protecting durations of frost damage at early ages according to the standard specifications provided in KCI(Korean Concrete Institute) are suggested by appling logistic curve, which evaluates the strength development of concrete with maturity. According to the results, as W/C and compressive strength for protecting from frost damages at early ages increased, longer protecting duration is required. It shows that the protecting durations of FAC(Fly Ash Cement) are longer than those of OPC(Ordinary Portland Cement).

• Management & Information Systems Review
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• v.9
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• pp.117-137
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• 2002

As attention to the Internet from both companies and individuals is rapidly on the increase, hundreds of new websites are opening in a single day. Along with such a high attention to the Internet, to set up an effective website needs efficient evaluation and reliable evaluation criterions for the website. The existing homepage contests and evaluation models are limited to certain websites in a special field or to the systemic side and to the contents, which in fact weakened the development of detailed evaluation sections and items possibly measured. This study is designed to integrate and seek out methods and success factors that should be considered when a website is built up, discovering evaluation criterions and making evaluation models objectively possible to be measured. The study focused on investigation into a new measurement standard and model by considering the previous studies, in order to suggest the followings: Centering the 7 top evaluation sections by type of each website such as (1) Service, (2) Mechanism, (3) Structure & Navigation, (4) Usability, (5) Contents (6) Community, (7) Communication, the study suggests an objective and reasonable website evaluation model on a basis of common factors considered in an integral and optimum view.

• Korean Journal of Child Studies
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• v.28 no.6
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• pp.37-52
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• 2007

This study was planned to develop an Internet Game Addiction Scale for 9- to 12-year-old Korean children. Based on literature review and analysis of counseling cases, the concept of the internet game addiction was defined. Items of the scale were developed and then the content validity of the scale was examined by 20 professionals. Then a preliminary survey of 188 3rd to 6th grade students was made, and the main survey of 699 3rd to 6th grade students throughout Korea. The main results are as follows; [I] Internet Game Addiction Scale consists of 3 factors with 20 items : game-oriented life(6 items), tolerance & mastery loss(7 items), and withdrawal & emotional experience(7 items); [II] appropriateness of item mean and standard deviation was proved, a 3-factor structure confirmed through factorial analysis and cross validation; [III] appropriateness of the scale confirmed through criterion validity and reliability.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.36 no.6
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• pp.508-514
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• 2010

Bisphosphonates are used effectively for many medical conditions, such as multiple myeloma, Paget's disease, osteoporosis, etc. However, recently, osteonecrosis of the jaw was observed in patients receiving long-term bisphosphonate therapy, including oral administration. This osteonecrosis is refractory, and complete recovery is not guaranteed despite a standard treatment protocol being established by many associations related to oral and maxillofacial surgery. The treatment outcome of oral bisphosphonate-related osteonecrosis of jaw (BRONJ) is reported with a review of the relevant literature.

• Tuberculosis and Respiratory Diseases
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• v.79 no.4
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• pp.248-256
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• 2016

Somatic mutations that lead to hyperactivation of epidermal growth factor receptor (EGFR) signaling are detected in approximately 50% of lung adenocarcinoma in people from the Far East population and tyrosine kinase inhibitors are now the standard first line treatment for advanced disease. They have led to a doubling of progression-free survival and an increase in overall survival by more than 2 years. However, emergence of resistant clones has become the primary cause for treatment failure, and has created a new challenge in the daily management of patients with EGFR mutations. Identification of mechanisms leading to inhibitor resistance has led to new therapeutic modalities, some of which have now been adapted for patients with unsuccessful tyrosine kinase inhibitor treatment. In this review, we describe mechanisms of tyrosine kinase inhibitor resistance and the available strategies to overcoming resistance.

• Journal of Families and Better Life
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• v.5 no.2
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• pp.163-176
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• 1987

This paper was designated to review consumer complaining in the context of consumerism . For the purpose of this study, the literature in the consumer satisfaction/ dissatisfaction, complaining and noncomplaining behavior was reviewed. A conceptual approach to understanding why consumers complain or not when the dissatisfied was presented. It was suggested that regardless of how dissatisfied a consumer is , an action is taken or forgone only after the costs and benefits of the various alternative are considered and an assessment of the probabilities of success are made. It was suggested that aroused citizens through consumer education, government agency's effort to reduce the consumer's dissatisfaction and seller's marketing strategy in the view of consumerism are three main propositions for the enhancement of the consumer's quality of life in this study. Consumer complaining must be made in virtue of national economic systems( standard of living and the effectiveness of its marketing system, extent of government control and provision of consumer assistances) to achieve high levels of efficiency. Besides national economic systems. the third parties must be promoted for the efficient consumer complaining.

• Neonatal Medicine
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• v.25 no.2
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• pp.53-57
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• 2018

Even with the increasing number of high risk infants, neonatal care in Korea has undergone development with improved survival rate. This rapid improvement in the outcomes brought care quality in neonatal intensive care unit (NICU) to the surface. Quality improvement (QI) involves safe, timely, effective, efficient, equitable, and patient-centered care. In this review, methods of QI are described with examples of NICU QI topics. Each NICU can voluntarily develop a QI project, but systematic supports are essential. As human and systemic resources in NICUs in Korea are insufficient, institutional and national supports are necessary to attain QI. Furthermore, collaborative neonatal network can provide a QI standard and evidence based-medicine, as well as QI research.

• Journal of Korea Society of Digital Industry and Information Management
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• v.4 no.4
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• pp.103-111
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• 2008

While the demand for ASP(Application Service Provider) focused on small and medium enterprises who are fully aware of needs of ICT readiness has been increasing, those who consider to adopt ASP are wondering whether their performance would be actually successful if they did. These concerns can be an important standard of judgement, when introducing new information systems, by analyzing ROI(Return on Investment) on the current enterprises. Therefore, to review the feasibility of investing IT and measuring the performance, this study suggests a framework for ROI analysis which estimates IT investment performance, through multi-criteria approach on both financial performance index and non-financial one. We applied methodology on ASP-based IT investment performance evaluation to sample manufacturing companies under 50 employees and deduced the main implications to be considered when introducing the system.

• Korean System Dynamics Review
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• v.8 no.1
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• pp.49-66
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• 2007

Due to criminal aspects spreading nation wide, their intelligence level increasing and becoming digitalized, the citizens' interest in and desire for crime security have increased. Until now, the preceding researches have been focused on finding the specific variables that have direct effects on the demand for police manpower through regression analysis and attempted to predict number of needs. However, there have never been any researches producing the accurate number of demands for crimes and human resources needed for each work load. Therefore, this research have analyzed each police station functions by interviewing the persons in charge and selected the main duty for each functions. From this, by using the method of system dynamics, this research was able to predict the standard number of manpower needed for each police station functions. Also, by making a model for each 235 police stations, the best efficient employment plan for police stations and district agencies have been further discussed based on the computer simulation results.

• Korean Journal of Head & Neck Oncology
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• v.1 no.1
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• pp.63-74
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• 1985

Although regional and myocutaneous flaps are still the standard in head and neck reconstruction. The capacity to transfer distant tissues by microsurgical technique expands the reconstructive surgeon's ability to restore severe deformities of the head and neck. From 1981 to 1985, thirteen patients with extensive defects of the head and neck after extirpative surgery of tumor have been reconstructed utilizing the technique of microsurgical composite tissue transplantation. In this series of patients, six presented with reconstructions in the different region of the head and neck with review of literatures. The results of case analysis are summarized as follows: 1) Transplantation was successful in twelve among thirteen patients (92%). 2) Seven patients presented with malignancy and six with benign tumor. 3) Frequent sites of reconstruction were face and mandible. 4) Fourteen free composite tissue transplantations for reconstruction of thirteen patients were obtained six different tissue compositions from eight different donor sites. 5) The recipient artery and vein was most often superficial temporal or facial vessels. 6) The average time of operation was ten hours.