• Proceedings of the Korean Vacuum Society Conference
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• 2013.02a
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• pp.159-159
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• 2013

Atomically thin graphene is the ideal model system for studying nanoscale friction due to its intrinsic two-dimensional anisotropy. Furthermore, modulating its tribological properties could be an important milestone for graphene-based micro and nano-mechanical devices. Here, we report that the tribological properties can be easily altered via simple chemical modifications of the graphene surface. Friction force microscopy measurements show that hydrogenated, fluorinated, and oxidized graphenes exhibit, 2-, 6-, and 7-fold enhanced nanoscale friction on their surfaces, respectively, compared to pristine graphene. The measured nanoscale friction should be associated with the adhesive and elastic properties of the chemically modified graphenes. Density functional theory calculations suggest that, while the adhesive properties of chemically modified graphenes are marginally reduced down to ~30%, the out-of-plane elastic properties are drastically increased up to 800%. Based on these findings, we propose that nanoscale friction on graphene surfaces is characteristically different from that on conventional solid surfaces; stiffer graphene exhibits higher friction, whereas a stiffer three-dimensional solid generally exhibits lower friction. The unusual friction mechanics of graphene is attributed to the intrinsic mechanical anisotropy of graphene, which is inherently stiff in plane, but remarkably flexible out of plane. The out-of-plane flexibility can be modulated up to an order of magnitude by chemical treatmentof the graphene surface. The correlation between the measured nanoscale friction and the calculated out-of-plane flexibility suggests that the frictional energy in graphene is mainly dissipated through the out-of-plane vibrations, or the flexural phonons of graphene.

• The Journal of the Korea Contents Association
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• v.9 no.5
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• pp.249-256
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• 2009

The purpose of this study is to suggest the strategies of building disaster resistant communities to overcome communities destruction and vulnerability caused by the Hebei Spirit oil spill accident in Taean on December 7th, 2007. For accomplishing the purpose, we drew problems of approach based on context of community, governance strategy, and community-based approach. And based on the results of this analysis, suggestions were made as follows for building disaster resistant communities. First, when Hebei Spirit oil spill accident occurred we have been short of regional study and unreality of regional safety plan. For overcoming this points, we have need of activation of regional study and establishment of regional safety plan based on the bottom-up approach. Second, while the spill has brought a milestone activation of volunteer, we have not still efficient disaster management based on governance. So we have to establish network-governance to cooperate with government-business-private sector for efficient disaster management. Third, we argue that it is important to build social capital such as social networks, social contacts for community-based disaster resistant communities.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.44
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• pp.3-29
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• 2009

The PECL have been drawn up by an independent body of experts from each member state of the european union under a project supported by the european commission and many other organizations. Salient features of the general provisions of the PECL, freedom of contract and pecta sunk servanda, good faith and fair dealing, most of the PECL are non-mandatory. The CISG uses the term fundamental breach in various setting. The concept of fundamental breach is a milestone in its remedial provisions. Its most important role is that it constitutes the usual precondition for the contract to be avoided(Art. 49., Art. 51., Art. 64., Art. 72., Art. 73). In addition, where the goods do not conform with the contract, a fundamental breach can give rise to a requirement to deliver substitute goods. Furthermore, a fundamental breach of contract by the seller leaves the buyer with all of his remedies intact, despite the risk having passed to him(Art. 70). Basically, PECL, PICC generally follows CISG, it was similar to all the regulation's platform though the terms and content sometimes differ. For example regarding to the non-performance and remedies, in the case of non-performance, that is the PECL/PICC term analogous to breach of contract as used in the CISG. Furthermore the PECL/PICC used fundamental non-performance refered to in PECL Art. 8:103 ; PICC Art. 7.1.1. correspond generally to the concept of fundamental breach referred to in CISG Art. 25. The main significance of the fundamental non-performance, in any systems, is to empower the aggrieved party to terminate the contract. The need for uniformity and harmony in international commercial contracts can be expected to lead to growth of international commerce subject to the CISG, PICC, and PECL. It is hoped that the present editorial remarks will provide guidance to improve understanding between the contractual party of different countries in this respect and following key-words.

• Journal of Digital Convergence
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• v.18 no.11
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• pp.59-71
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• 2020

The paper reports on a systematic literature review results concerning the smart factory research in Korea. 144 papers were identified from the articles published in Korean journals listed in the Korean citation index by keyword search related to smart factory. Bibliometric analyses were conducted by way of co-occurrence and network analysis using the VOSViewer. Automation, intelligence, and bigdata were identifed as three critical clusters of research while, operating systems, international policy and cases, concept analysis as other three clusters of research. Internet of Things turned out to be a key technology of smart factory linking all of these areas. Servitization studies were small in numbers but seemed to have a lot of potential. Security researches seemed to be lacking connections with other areas of studies. Results of this study can be used as a milestone for identifying future research issues in smart factories.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.17 no.6
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• pp.1-10
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• 2017

Advanced ICT Technologies support the chance for success in business however there are challenges that should be overcome in messenger development and the overcoming challenges will be a base line for succession in business. In this paper, we identify the characteristics of mobile messengers and evaluate users' preferences using AHP. As a result, we evaluated the critical success factors which are important in mobile messenger development. The results of AHP were generated 0.098 consistency ratio(CR). When the result is less than 0.1 in CR, the result could be accepted as trusted questions. The priority of factors was security(1.409), entertainment(0.19), communication (0.187) then this shows the users concerned in security and entertainment. These are not only development's success factors but also a good milestone to check ICT trends for setting up business chances.

• Strategy21
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• s.38
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• pp.221-249
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• 2015

The Royal United Services Institute(RUSI) was founded in the middle of the 19th century in Britain. It was developed through 'Naval Historical Revitalization Movement' in that time. Many celebrities and people who were interested in the Navy participated in the activities of the RUSI. For example, the forums and lectures were held by prestigious persons, like Sir Garnet Wolseley and the Duke of Cambridge. It also became the milestone for guiding the flow of the Royal Navy's thought with the Naval Intelligence Department and the Naval Records Society. The forum of the RUSI was the place for debating naval hot issues. The journal of the RUSI was the space for suggesting an idea and gathering public opinions for developing Britain's sea power. Therefore, the RUSI was the public sphere for the Royal Navy in the 19-20th Century. And especially, the paper prize contest of the RUSI was the culmination of the RUSI's activities for the Royal Navy. Naval prize essays gave messages to the Royal Navy about the changing situation of European naval powers. Also, they made many meaningful debates for the Royal Navy to overcome the difficult situations in that time. Those essays were reflecting the issues of the Royal Navy and leading the way for getting over it. Besides, some people appeared through the contest and they played important roles for making the contingency and planning the war. The contest reflected the past, anticipated the future, and selected the talented persons to shape the future. This developing aspects of the RUSI could apply to the Korea Institute for Maritime Strategy(KIMS). The KIMS already carries out the role of the RUSI very similarly. If the KIMS changes to the way for open-door policy to more people, it will work more efficiently for their goal. In this respect, the messages of the RUSI will be very useful for improving the activities of the KIMS.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2004.08a
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• pp.217-225
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• 2004

Introduction of wave model, considered the effect of shoaling, refraction, diffraction, partial reflection, bottom friction, breaking at the coastal waters of complex bathymetry, is a very important factor for most coastal engineering design and disaster prevention problems. As waves move from deeper waters to shallow coastal waters, the fundamental wave parameters will change and the wave energy is redistributed along wave crests due to the depth variation, the presence of islands, coastal protection structures, irregularities of the enclosing shore boundaries, and other geological features. Moreover, waves undergo severe change inside the surf zone where wave breaking occurs and in the regions where reflected waves from coastline and structural boundaries interact with the incident waves. Therefore, the application of mild-slope equation model in this field would help for understanding of wave transformation mechanism where many other models could not deal with up to now. The purpose of this study is to form a extended mild-slope equation wave model and make comparison and analysis on variation of harbor responses in the vicinities of Ulsan Harbor and Ulsan New Port, etc. due to construction of New Port in Ulsan Bay. This type of trial might be a milestone for port development in macro scale, where the induced impact analysis in the existing port due to the development could be easily neglected.

• Journal of the Korean Society for Library and Information Science
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• v.39 no.4
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• pp.25-44
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• 2005

Research is one of main roles of university and its importance has been emphasized gradually since a few decades ago. Yet, the objective and concrete criterion lot the definition of the research university is not available in Korea, Accordingly, the role of the research university library is not established as a key system for research university. In this study the criterion for the United States research university is applied to domestic universities, thereby current status of research universities and their libraries between the United States and Korea is analyzed comparatively. Fundamental data including budget, employees and information resources for pursuing high research competitiveness necessary for the research university library are provided based on comparative analysis of 98 research university libraries in the United States and 38 domestic research university libraries. Correlation analysis data between library investment and research Publication are also provided. Finally this study can be used, hopefully, as a milestone for the establishing strategy of domestic research university libraries.

• Asian Pacific Journal of Cancer Prevention
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• v.16 no.15
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• pp.6541-6544
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• 2015

Background: Laryngeal malignancy is a common malignancy of the head and neck region. Affected patients usually present with features that are characteristic of certain subsites. The larynx is oncologically divided into three: supraglottis, glottis and subglottis. Studies from Western countries have shown that the glottis is the commonest subsite to harbour laryngeal malignancy. However, the supraglottis has been reported to be the commonest subsite in developing countries, including examples in the Indian subcontinent. To our knowledge, no study has been carried out in western Nepal about the epidemiology of laryngeal cancer to date. The purpose of this study was to analyse the epidemiology of laryngeal cancer in relation to its risk factors, age distribution,and preferred subsites and to see if there is any recent change in the subsite wise distribution of laryngeal malignancy in western Nepal. Materials and Methods: Patients of all ages and both sexes with suspected laryngeal malignancy were enrolled in the initial study. Detailed history taking and clinical examination was performed to find out the involved subsite in relation to the clinical features. Direct laryngoscopy was performed to further confirm the subsite and to take biopsy from the growth under general anesthesia. After confirmation of malignancy from the biopsy report, patients were finally included in the study. Data were analysed and observations were made to find out the distribution of laryngeal malignancy in different subsites. Results: The supraglottic larynx was the commonest subsite to harbor laryngeal malignancy. Smoking and alcohol were found to be the common risk factors. The mean age of the patients was in their sixties. Conclusions: Laryngeal malignancy is common in elderly individuals. Supraglottic laryngeal malignancy is the commonest laryngeal malignancy in people who smoke and drink alcohol in Nepal. Avoidance of alcohol use and smoking will be a milestone to reduce the incidence of laryngeal cancers and associated mortality.

• Archives of Plastic Surgery
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• v.43 no.5
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• pp.451-456
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• 2016

Background Comprehensive aesthetic surgery training continues to be a challenge for residency programs. Our residency program developed a rhinoplasty-based objective structured clinical examination (OSCE) based upon validated methods as part of the residency education curriculum. We report our experience with the rhinoplasty-based OSCE and offer guidance to its incorporation within residency programs. Methods The encounter involved resident evaluation and operative planning for a standardized patient desiring a rhinoplasty procedure. Validated OSCE methods currently used at our medical school were implemented. Residents were evaluated on appropriate history taking, physical examination, and explanation to the patient of treatment options. Examination results were evaluated using analysis of variance (statistical significance P<0.05). Results Twelve residents completed the rhinoplasty OSCE. Medical knowledge assessment showed increasing performance with clinical year, 50% versus 84% for postgraduate year 3 and 6, respectively (P<0.005). Systems-based practice scores showed that all residents incorrectly submitted forms for billing and operative scheduling. All residents confirmed that the OSCE realistically represents an actual patient encounter. All faculty confirmed the utility of evaluating resident performance during the OSCE as a useful assessment tool for determining the Next Accreditation System Milestone level. Conclusions Aesthetic surgery training for residents will require innovative methods for education. Our examination showed a program-educational weakness in billing/coding, an area that will be improved upon by topic-specific lectures. A thoroughly developed OSCE can provide a realistic educational opportunity to improve residents' performance on the nonoperative aspects of rhinoplasty and should be considered as an adjunct to resident education.