• Nuclear Engineering and Technology
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• v.54 no.12
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• pp.4708-4714
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• 2022

The novelty in the present search, the Soda-Lime-Silica (SLS) glass waste to prepare free lead glass shielding was used in order to limit the accumulation of glass waste, which requires extensive time to decompose. This also saves on the consumption of pure SiO₂, which is a finite resource. Furthermore, the combining of BaO with Bi₂O₃ into a glass network leads to increased optical properties and improved attenuation. The UV-Visible Spectrophotometer was used to investigate the optical properties and the radiation shielding properties were reported for current glass samples utilizing the PhysX/PDS online software. The optical property results indicate that when BaO content increases in glass structure, the Urbach energy ΔE, and refractive index n increases while the energy optical band gap E_opt decreases. The result of the metallisation criteria (M) revealed that the present glass samples are nonmetallic (insulators). Furthermore, the radiation shielding parameter findings suggest that when BaO was increased in the glass structure, the linear attenuation coefficient and effective atomic number (Z_eff) rose. But the half-value layer HVL declined as the BaO concentration grew. According to the research, the glass samples are non-toxic, transparent to visible light, and efficient radiation shielding materials. The Ba5 sample is considered the best among all the samples due to its higher attenuation value and lower HVL and MFP values, which make it a suitable candidate as transparent glass shield shielding.

• The Korean Journal of Emergency Medical Services
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• v.3 no.1
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• pp.77-90
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• 1999

This study focuses on investigating and analyzing overall information use behavior of the health fields researchers. Questionaries were 116 researchers in there nursing university or college and EMT college. Four areas were tested on the basis of the purpose that there would exist unique characteristics in the information seeking behavior of health fields researchers. The findings of the study shows that health fields researchers prefer monographs and journals; they tend to use current materials; the first information source for their research activities is the cited references in the book or journal article; they are likely to delegate literature searching to the librarian, but they tend to conduct direct searching in online setting; in general, they react positively for the rapid change in information environment caused by recent development of information technology. It is emphasized that to design an efficient information system and provide an effective information service in the health science related library or information center, it is essential to consider the major characteristics and attributes of health fields researchers in terms of their information use behavior.

• Journal of Engineering Education Research
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• v.16 no.3
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• pp.69-78
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• 2013

This study investigated various attributes that contributed to successful employment in order to develop employment support programs, especially for female engineering students. We surveyed engineering students who graduated between 2006 and 2011. The 401 employed graduates participated in an online survey. The surveys inquired about their attachment towards their major, participation in various academic and non-academic activities, and their participation's contribution to their successful employment. In regards to their majors, women, in general, had lower levels of satisfaction, confidence, attachment, and motivation to succeed in their fields when compared to their male counterparts. These results show that engineering colleges still need to work on empowering female engineering students to gain confidence in their engineering major and attachment. The graduate school experience was highly rated by both men and women, whereas double majors exhibited somewhat lower scores. Among academic activities, part-time work experience and major-related internships were rated as the most helpful, and among extracurricular activities, study-abroad for language training and participation in student council or clubs received high scores. There was little difference between men and women in study-abroad participation, and women participated more actively in student councils. However, women had much less major-related work experience, reaffirming that colleges need to expand internship and field experience programs for female students.

• Journal of the Korean Society of Clothing and Textiles
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• v.42 no.2
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• pp.237-250
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• 2018

This study improves maternity clothes worn by pregnant women across each trimester. A total of 164 survey results from pregnant women living in the metropolitan area around Seoul, South Korea were received from November 2015 to July 2017. The results of this study were as follows. First, Internet shopping purchases were significantly lower during the first trimester of pregnancy than during the mid-trimester and third trimester (p<.001). Further, satisfaction levels with most items purchased online were significantly lower in the first trimester of pregnancy. Regarding the purchase price, there was no difference according to the pregnancy trimester. During the first trimester of pregnancy less body shape changes occur than in the mid-trimester and third trimester; however, the first trimester shows the lowest satisfaction levels for each item of maternity clothing and most body parts when worn. There were also no differences according to pregnancy trimester in terms of preferred maternity clothes purchased, but there were significant differences according to occupational status. Working pregnant women generally preferred not to reveal their body shape.

• Journal of Information Technology Services
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• v.18 no.5
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• pp.71-83
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• 2019

This study aimed to develop and pilot-test educational program prototypes of training health coaches to help cancer patients overcome crises and create positive growth. For this purpose, the educational contents and methods of the blended learning program prototypes were derived through learner needs and literature analysis. The prototypes, which consist of introducing of health management and health information and understanding and practice of basic coaching and health coaching, were developed to integrate with four sessions of face-to-face, off-line classes, training practices through 12 tele-classes, and use of online learning system. The prototypes were conducted and pilot-tested by a total of 35 students selected through the document screening and the interview. After participating in the blended learning program, learners expressed greater overall satisfaction with each session program (average score = 4.36, with 5 being most satisfied), satisfaction with learning contents (average score=4.42) satisfaction with course preparation (average score = 4.26) and satisfaction with lecture materials (average score = 4.19). The results of this study show that a systematic and integrative approach for designing a blended learning program can be useful for various educational needs in health and medical fields. In the future, empirical studies are expected to see how these curricula are actually implemented and assess whether the intended learning outcomes are achieved.

• Imaging Science in Dentistry
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• v.41 no.2
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• pp.43-51
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• 2011

Purpose : The purpose of this article is to review the current status of dental caries diagnosis using cone beam computed tomography (CBCT). Materials and Methods : An online PubMed search was performed to identify studies on caries research using CBCT. Results : Despite its usefulness, there were inherent limitations in the detection of caries lesions through conventional radiograph mainly due to the two-dimensional (2D) representation of caries lesions. Several efforts were made to investigate the three-dimensional (3D) image of lesion, only to gain little popularity. Recently, CBCT was introduced and has been used for diagnosis of caries in several reports. Some of them maintained the superiority of CBCT systems, however it is still under controversies. Conclusion : The CBCT systems are promising, however they should not be considered as a primary choice of caries diagnosis in everyday practice yet. Further studies under more standardized condition should be performed in the near future.

• International Journal of Costume and Fashion
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• v.11 no.2
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• pp.65-78
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• 2011

Social media which support to share information and communicate between online users have recently won great popularity. Of the various social services blogs have played an active role as a community in sharing delivering and exchanging information among individual users who have share similar opinions hobbies and preferences. Based on this cultural phenomenon some companies often take advantage of blogs as a marketing tool to strengthen their public relations or deliver particular information to their costumer. This study is designed to classify fashion-related blogs and define the characteristics of each type expecting significant influences on future studies on this topic. We selected 50 fashion-related blogs as subjects including 25 Korean blogs and the same number of international blogs, defined their characteristics and classified them into four different types. As the result we found that there are apparent differences between the four types of blogs: "Individual taste" blogs which noticeably reflect bloggers' own preference "Trend leader" blogs in which the bloggers intend to be trend leaders beyond expressing their preference "Fashion media" blogs which plays a significant role as a magazine by providing various information concerning fashion for costumers and "Sales promotion" blogs which are used as promotional materials to attract customers by providing product reviews or advertisements.

• Korean Institute of Interior Design Journal
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• v.22 no.2
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• pp.140-148
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• 2013

The purpose of this study is to examine the current status of allergic diseases associated with the housing environment and the psychological attitude of residents towards relevant risk factors. This study surveyed 1,200 people. In the first round, 200 participants were questioned through direct survey methods, while 1,000 participants filled out an online survey in the second round. Selected study subjects consisted of allergic diseases known to be closely related to housing environment factors. With advice from medical experts, the analysis included the examination of the prevalence status regarding five types of allergy-related diseases-allergic conjunctivitis, allergic rhinitis, allergic dermatitis, asthma and headache-with the range of disease incidence set within the past ten years. The survey was conducted on all age groups except those nine years old and younger, and the findings are as follows. Allergic diseases were found to be more prevalent among women than men. Residents identified effective methods for the alleviation and treatment of allergic diseases as ventilation, use of environmentally-friendly finishing materials, maintenance of a clean living space through cleaning or washing, and sunlight exposure. Residents' understanding of allergic diseases varied depending on their experience with such diseases and residential characteristics.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.9 no.4
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• pp.1471-1492
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• 2015

The rapid development of smartphone technologies have resulted in the evolution of mobile botnets. The implications of botnets have inspired attention from the academia and the industry alike, which includes vendors, investors, hackers, and researcher community. Above all, the capability of botnets is uncovered through a wide range of malicious activities, such as distributed denial of service (DDoS), theft of business information, remote access, online or click fraud, phishing, malware distribution, spam emails, and building mobile devices for the illegitimate exchange of information and materials. In this study, we investigate mobile botnet attacks by exploring attack vectors and subsequently present a well-defined thematic taxonomy. By identifying the significant parameters from the taxonomy, we compared the effects of existing mobile botnets on commercial platforms as well as open source mobile operating system platforms. The parameters for review include mobile botnet architecture, platform, target audience, vulnerabilities or loopholes, operational impact, and detection approaches. In relation to our findings, research challenges are then presented in this domain.

• Journal of the Korea Computer Industry Society
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• v.4 no.4
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• pp.599-606
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• 2003

As collaborative computing technology goes widespread, interactions among concurrent users are very important, especially in education domain. But existing co-authoring mechanisms and CSCW technologies have limitations for conflict handling. In general, co-authoring tools provide solutions that one or certain users' views are influenced for conflict handling. These solutions have advantages to accomplish rapidly for conflict handling, but other authors' views cannot be affected sufficiently. In this paper, we define the courseware as network structure of instructional units. And we propose co-authoring model for courseware using collaborative conflict-handling mechanism. Using this mechanism, instructors can affect their own viewpoints to the unique courseware. As contents created in these forms have multiple structures. it can provide proper materials according to students' requirements. Therefore, it can provide students with individual learning facilities on online educational systems. Proposed model is useful for courseware based on structured form of document such as XML.