• 한국안전학회지
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• 제31권5호
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• pp.102-108
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• 2016

This paper presents a new strength method of underground box structures under additional surface load. An L-bracing using pre-flexed steel member threads called the "Pre-flex strength method" is used to improve capacity of the RC box structure under earth pressure due to additional surface load. The pre-flexed steel member is fixed the top and bottom of the structure after chemical anchor was installed by drilling hole on the box structure. The structural performance was evaluated analytically. 3 types of underground RC box structure were used; $2.0m{\times}2.0m$, $3.0m{\times}3.0m$ and $4.0m{\times}4.0m$. For the performance evaluation, structure analysis were performed on moment and shear resisting structures with and without pre-flex strength method. Numerical results confirmed that the proposed strength member system installed on underground RC box structures enhanced the strength capacity. The feasible region of the proposed pre-flex strength method in accordance with the earth pressure due to additional surface depth was evaluated.

• 대한산업공학회지
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• 제39권2호
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• pp.119-128
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• 2013

Most internet users utilize internet portal search engines, such as Naver, Daum and Google nowadays. But since the results of internet portal search engines are based on universal criteria (e.g. search frequency by region or country), they do not consider personal interests. Namely, current search engines do not provide exact search results for homonym or polysemy because they try to serve universal users. In order to solve this problem, this research determines keyword importance and weight value for each individual search characteristics by collecting and analyzing customized keyword at external database. The customized keyword weight values are integrated with search engine results (e.g. PageRank), and the search ranks are rearranged. Using 50 web pages of Goolge search results for experiment and 6 web pages for customized keyword collection, the new customized search results are proved to be 90% match. Our personalization approach is not the way that users enter preference directly, but the way that system automatically collects and analyzes personal information and then reflects them for customized search results.

• 보건의료산업학회지
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• 제7권3호
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• pp.251-260
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• 2013

The purpose of this study was to make a comparative analysis of dental question and answer in portal sites. To achieve this, 4,212 questions were used for final analysis after connecting to Naver, Daum and Nate, which take first, second and third place in rank information of all sites at Rankey.com, to search dental information by keyword from January to late March. The results are as follows. Naver was the highest as a portal of Internet search engines. Questions on the use of dental clinics, the quality of dental services and the offer of dental services by types of dental clinics were very important. Dental clinics had to give dental patients customized services and information to please them through dental services and dental information services on the Internet, and questions and answers on this were increasing very explosively. Consequently, Dental clinics will have to give Internet users and health- and disease-related data searchers distinctive professional services by inquiring into factors affecting portal search and factors affecting health- and disease-related search, respectively.

• 한국도서관정보학회지
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• 제37권2호
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• pp.217-230
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• 2006

급변하는 정보 환경에서 검색 포탈들의 경쟁력을 강화하기 위해서는 우수한 백과사전 서비스를 확보하여 이용자에게 제공하는 것이 필수적이다. 본 연구에서는 국내 주요 검색 포탈들인 네이버, 다음, 야후, 엠파스의 백과사전 서비스를 결과의 적합성, 최신성, 멀티미디어 제공 측면에서 분석, 평가하였다. 평가 기준별로 세부적인 평가 항목과 평가방법론을 제시하였다. 백과사전 서비스 평가 시 본 연구에서는 실제 이용자들이 입력한 실제 질의들을 활용하였다. 또한 본 연구에서는 포탈별 백과사전 기능의 특징을 비교 분석하였다. 본 연구의 결과는 향후 웹 기반 백과사전 서비스의 개선에 활용되고 이용자가 우수한 웹 기반 백과사전을 선택하는데 참고자료로 활용될 수 있을 것으로 기대된다.

• Journal of Microbiology and Biotechnology
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• 제28권4호
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• pp.520-526
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• 2018

Conessine, a steroidal alkaloid, is a potent histamine H3 antagonist with antimalarial activity. We recently reported that conessine treatment interferes with $H_2O_2$-induced cell death by regulating autophagy. However, the cellular signaling pathways involved in conessine treatment are not fully understood. Here, we report that conessine reduces muscle atrophy by interfering with the expression of atrophy-related ubiquitin ligases MuRF-1 and atrogin-1. Promoter reporter assay revealed that conessine treatment inhibits FoxO3a-dependent transcription, $NF-{\kappa}B$-dependent transcription, and p53-dependent transcription. We also showed by quantitative RT-PCR and western blot assays that conessine treatment reduced dexamethasone-induced expression of MuRF1 and atrogin-1. Finally, we demonstrated that conessine treatment reduced dexamethasone-induced muscle atrophy using differentiated C2C12 cells. These results collectively suggest that conessine is potentially useful in the treatment of muscle atrophy.

• 유통과학연구
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• 제13권11호
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• pp.15-22
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• 2015

Purpose - This study aims to propose and validate a research model that describes the relationships between customer socialization, customer participation, and customer loyalty in the online service industry. Although customer loyalty is frequently discussed topic in marketing and strategy research, this study takes a novel approach in adopting customer socialization and participation as the antecedents to customer loyalty. Research design, data, and methodology - Based on adopting and modifying measurement items of the constructs from previous studies, this study develops survey regarding the constructs within the proposed research model. Among current registered members of Facebook and DaumKakao, 522 college students and other regular users are selected as the samples for conducting the survey. The collected data is analyzed by structural equation modeling method using SPSS and AMOS. Results Proposed hypotheses of the positive relationships - between customer socialization and customer participation, and between customer participation and customer loyalty are all supported. Conclusions - The results of this study suggest customer participation as an important precursor to customer loyalty in the online service industry. Also, customer socialization is validated as a new strategy to increase customer participation. These results validate the practical importance of communicating mission, purpose, value, and other customer socialization activities that firms undertake.

• 정보관리학회지
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• 제29권2호
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• pp.113-133
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• 2012

본 연구는 한국 통합 검색 환경에서의 이용자 적합성 판단 기준에 관한 탐색적 연구이다. 이를 위해 10명의 참가자들을 대상으로 반구조화(semi-structured) 인터뷰를 수행하여 데이터를 수집하였다. 참가자들은 네이버, 다음 등과 같은 통합 검색 환경에서 본인들이 관심 있거나 필요로 하는 다양한 검색을 수행하고, 그 과정에서 문서가 적합한지와 그 판단 기준에 대해 기술하였다. 연구 결과 8개의 적합성 판단 기준과 비적합성 판단 기준, 그리고 검색 환경이 변화하여도 이용자가 적합성을 판단하는 기준들이 크게 변화하지는 않지만 데이터 증가와 이용자 요구의 고도화로 특수성과 구체성이 중요한 적합성 판단 기준으로 부각되는 점을 발견하였다.

• International Journal of Contents
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• 제14권3호
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• pp.27-31
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• 2018

Social network service (SNS) data related to green tourism were used to estimate preferred tour sites and users' interests. Keywords related with green tour activities were employed to search the SNS data. SNS data were collected from Korean blogs such as Naver and Daum from June $1^{st}$ to August $31^{st}$ between 2015 and 2017 using text-mining solution. During the study period, seven hundred and five posts were analyzed. Associated words that frequently co-occurred with keywords were classified into different categories depending on the nature of associated words. Associated words included swimming pools and camping sites (location); experience and swimming pools (attribute); and water play and culture (culture/leisure). Our data suggest that SNS users with experience of green tourism in Korea exhibited interest in green tourism with swimming pools, camping sites, experience, water play and/or culture rather than particular popular sites. Based on the findings, it is recommended that preferred facilities such as swimming pools should be provided at green tourism sites to meet the users' needs and to facilitate green tourism.

• 대한한방소아과학회지
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• 제27권3호
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• pp.12-19
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• 2013

Objectives Children's unique taste bud often gives them difficult time to take oriental medicines. To overcome, survey was conducted focusing on useful and practical tips on how to take them. Methods The survey was carried out by posting mail questionnaire. Target clinics for the survey were selected by the internet search engine, Google, Daum, and Naver, and typing in "oriental treatment + pediatrics", "pediatrics + oriental medicine", "pediatric oriental clinic". 24 clinics were searched, but they were further narrowed down to the specialized pediatric oriental clinics. Also, total of 38 inquiry leaflets were distributed to 14 University Oriental Hospitals. Results If children refuse to take the medicine, mixture with sweeteners can be prescribed for them. Among them, oligosaccharide is the most recommended followed by sugar and honey. To avoid rejection to medication, use of different formulation, such as distillation medicine, soft X-Section, granulated medicine, and character printing can be used. Conclusions The most effective method is to investigate the mixture first, and then the alternative formulations.

• 한국안전학회지
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• 제32권2호
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• pp.85-91
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• 2017

When the shell-type roller gate is partly open, at a certain height the large vibration is caused due to resonance and the vibration can cause damage to the gate. In this study, the review on amplitude of vibration and the possible resonance occurring at the time of opening or closing of gate is performed. Throughout the natural frequency analysis, the installation location of the measuring instrument was selected. On opening or closing of gate, the measurement of gate vibration is performed. The natural frequencies according to the opening range of the gate is analyzed. As a result of measurement and analysis, we proposed ranges in which vibration occurs largely and resonance is predicted as an avoiding open ranges, or the safe opening or closing of the shell-type roller gate. The application of this paper's avoiding open range estimation method of shell-type roller gate can be utilized as the basic data for the systematic and rational maintenance management of dams and submerged weirs in the future, and it is expected that this study can bring forth.