• 대한교통학회지
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• 제28권6호
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• pp.85-97
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• 2010

본 연구는 정류소에서 여러노선의 버스가 동시에 몰려들어오는 버스몰림운행의 실태를 파악하고 이로 인해서 야기되는 문제점을 개선하기 위하여 버스몰림 운행지속시간 모형을 추정하고 버스몰림운행에 영향을 미치는 요인을 분석하였다. 버스몰림지속시간의 관측치를 대상으로 8개의 지속시간에 대한 분포를 검토하여 가장 적합도가 높게 나타난 weibull 분포를 가정한 모형을 개발하였다. 18개 영향변수를 검토하였으며 정차면수, 정차면수당 노선수, 노선당 최대 승하차인원을 설명변수로 하는 버스몰림운행 지속시간 모형을 개발하였다. 중앙버스전용차로(도봉미아로)와 가로변 전용 및 일반차로(통일의주로)에 대한 모형을 각각 도출하여 비교하였다. 그 결과, 도봉미아로의 몰림지속시간은 통일의주로에 비해 교통량에 대한 영향을 많이 받으며, 통일의주로는 도봉미아로에 비해 정차면수와 정차면수당 노선수, 노선당 최대 승하차인원에 많은 영향을 받는 것으로 나타났다. 개발된 모형을 토대로 버스몰림운행 현상의 완화방안을 제시하였다.

• 한국재료학회:학술대회논문집
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• 한국재료학회 2011년도 추계학술발표대회
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• pp.20.1-20.1
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• 2011

The nano-sized quantum structure has been an attractive candidate for investigations of the fundamental physical properties and potential applications of next-generation electronic devices. Metal nano-particles form deep quantum wells between control and tunnel oxides due to a difference in work functions. The charge storage capacity of nanoparticles has led to their use in the development of nano-floating gate memory (NFGM) devices. When compared with conventional floating gate memory devices, NFGM devices offer a number of advantages that have attracted a great deal of attention: a greater inherent scalability, better endurance, a faster write/erase speed, and more processes that are compatible with conventional silicon processes. To improve the performance of NFGM, metal nanocrystals such as Au, Ag, Ni Pt, and W have been proposed due to superior density, a strong coupling with the conduction channel, a wide range of work function selectivity, and a small energy perturbation. In the present study, bismuth metal nanocrystals were self-assembled within high-k $Bi_2Mg_{2/3}Nb_{4/3}O_7$ (BMN) films grown at room temperature in Ar ambient via radio-frequency magnetron sputtering. The work function of the bismuth metal nanocrystals (4.34 eV) was important for nanocrystal-based nonvolatile memory (NVM) applications. If transparent NFGM devices can be integrated with transparent solar cells, non-volatile memory fields will open a new platform for flexible electron devices.

• 의료법학
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• 제11권2호
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• pp.181-208
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• 2010

Maternity services is often perceived as a troublesome business and obstetric litigation is on the increase in Western countries. Overall, the number of claim and cost of litigation to the NHS Litigation Authority (NHSLA) from maternity services in the UK is increasing every year. Maternity services account for 60-70% of the total sum paid. This has widespread implications for both the individual practitioners and the institutions where they work, due to increasing malpractice insurance premiums. Fear of litigation is also attracting fewer medical graduates into the specialty, leading to a recruitment crisis in obstetrics and gynaecology. The litigation process can cause pain, suffering and distress to clinicians as well as to the patients and their families. Litigation in maternity services is the result of a complex of events when malpractice (presumed or real) impacts on the attitude of pregnant women and their environment. In such complexity, information is mandatory but may often be misinterpreted. If messages are not tailored to the receiver's capacity, communicating well with the pregnant patient becomes crucial. Therefore, to reduce medicallegal issues in obstetrics, increasing attention and an applicable standard of obstetric care to avoid negligence and medical errors should go along with other measures. Considering UK's experiences, NHS redress scheme make it easier to pursue small claims and birth related claims, without necessarily reducing the number of claims processed through the conventional legal system and perhaps encouraging even more of them. The task of dealing with the greater number of inquiries into their practice would inevitably create an added burden for clinicians and hospital managers. Thus further proposals are required to limit the cost of processing inflated claims and to consider whether clinicians should be given some protection from litigation alleging a failure to prevent birth related impairment.

• 한국환경보건학회지
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• 제42권3호
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• pp.160-168
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• 2016

Objectives: Materials coming into contact with food may result in the migration of chemical substances into the food. To protect consumers from exposure, Regulation (EU) No. 10/2011 specifies the use of standard migration tests. Polyethylene terephthalate (PET), widely used for food packaging materials, has drawn the attention of researchers because unwanted migration of PET into food might occur when consumers reuse packaging material. The aim of this study was to predict and develop a migration model for two components, acetaldehyde and butyraldehyde in PET, into food simulants under conditions of changing pH and solvents, such as those observed in fermented foods like kimchi or sauerkraut. Methods: Using a migration model based on Fick's second law of diffusion in one dimension, the migration of acetaldehyde and butyraldehyde from PET into a simulant of fermented food at $20^{\circ}C$ over 10 days was evaluated. The simulant for fermented food was modelled as 10% ethanol for three days, followed by 3% acetic acid for seven days. Results: The migration of acetaldehyde into the 10% ethanol was 0.36 times that of a simulated fermented food system, while that of butyraldehyde was 1.34 times greater. These results may have been influenced by the chemical interactions among the migrants, polymers and simulants, as well as by the solubilities of the migrants in polymers and simulants. Conclusion: Because food simulants have a limited capacity to mimic real food systems under the current migration model, an appropriate simulant and migration test should be considered in the case of increasing acidity. Furthermore, since the accuracy of the worst-case estimation of migration predicted by the current model is severely limited under changing food conditions, food simulants and their interactions should be further investigated with respect to conservative migration modelling.

• 한국안전학회지
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• 제27권4호
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• pp.101-107
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• 2012

The statistics of industrial accident reported by ministry of Employment and Labor denoted a significant increase of musculoskeletal disorders(MSDs) after 1993, and showed the higher incident rate by 71.3% over the overall worker's disorders. Also, it was expected that Korean society will become the post-aged society in 2026 with 20.8% of elderly who is over 65 years old. The reports suggest possible problems caused by the older worker known to have reduced working ability than the young counterparts. On this basis, the goal of this study was to investigate the relationship between MSDs symptoms and work ability in the shipbuilding industry. To achieve this goal, this study distributed a questionnaire for total 1,244 shipbuilding employers, and used 910 employers' reports which revealed validity for this study. The questionnaire included the MSDs symptoms report developed by the Korean Occupational Safety and Health Association(KOSHA) and the work ability index(WAI) developed by Finnish Institute of Occupational Health(FIOH). Results showed no relationship between MSDs symptoms and age, years of work and exercise. Also, the work ability was increased until 44 years old, but it was decreased after that time because of the reduced physical capacity. Meanwhile, the years of work and exercise have positive correlation with work ability. However, the results revealed significant relationships between WAI and age, years of work, task characteristics and exercise. All together, the MSDs symptoms have a close relationship with the work ability in that the work ability of workers with the MSDs symptoms was reduced. This study may suggest the needs of more efforts and attention on the MSDs prevention to increase the work ability.

• BMB Reports
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• 제31권4호
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• pp.370-376
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• 1998

Src-Homology 2 (SH2) domains have a capacity to bind phosphotyrosine-containing sequence context and play essential roles in various cellular signaling pathways. Due to the specific nature of the binding between SH2 domains and their counterpart proteins, inhibitors of SID domain binding have drawn extensive attention as a potential candidate for therapeutic agents. Here, we describe the binding assay system to screen for the ligands or blockers of the SH2 domains with an emphasis on the $p56^{lck}$ SH2 domain. In our assay system, SID domains expressed and purified as fusion proteins to Glutathione-S-transferase (GST) were covalently attached to 96-well microtitre plates through amide bond formation, which were subsequently allowed to bind the biotinylated phosphotyrosine (pY)containing synthetic pep tides. The binding of biotinylated pY peptides was detected by the horseradish peroxidase (HRP)-conjugated streptavidin. Using the various combinations of SH2 domain-pY peptides, we observed that: (1) The binding of pY-peptides to its counterpart SH2 domain is concentration-dependent and saturable; (2) The binding is highly specific for a particular combination of SH2 domain-pY peptide pair; and (3) The binding of Lck SH2-cognate pY-peptides is specifically competed by the nonbiotinylated peptides with expected relative affinity. These results indicate that the established assay system detects the SH2-pY peptide interaction with reproducible sensitivity and specificity and is suitable for screening the specific inhibitors of $p56^{lck}$ SH2 function.

• 한국콘텐츠학회논문지
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• 제18권2호
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• pp.11-25
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• 2018

본 연구는 한국 엔터테인먼트 기업 경영자들이 지닌 '기업가적 지향성'(EO, Entrepreneurial Orientation)이 기업의 성과에 어떠한 영향을 미치는지를 분석하였다. 엔터레인먼트 기업의 기업가적 지향성이 기업 성과에 미치는 직접적인 영향을 검증하고, 최고경영층(TMT: Top Management Team)의 다양성과, 지배구조 유형의 조절효과를 알아보았다. 본 연구는 기존 연구에 두 가지 면에서 기여를 한다. 첫째, 중소벤처기업 연구의 중요한 이슈로 주목을 받고 있지만 주로 제조, IT기업 위주의 연구에 머물러 있던 기업가적 지향성의 개념을 성장산업인 엔터테인먼트 산업에서 검증하였다. 둘째, 사람의 역량이 큰 역할을 하는 엔터테인먼트 기업 경영자와 임원들의 특성을 TMT의 다양성이라는 개념을 도입해 검증하였다.연구 결과 엔터네인먼트 기업가들이 지닌 기업가적 지향성(혁신성, 진취성, 위험감수성)은 기업의 재무적 성과에 긍정적인 영향을 미쳤다. TMT가 다양할수록, 대주주 영향력이 강한 소유 직접경영일수록 긍정적인 영향력은 확대되는 것으로 나타났다.

• Asian-Australasian Journal of Animal Sciences
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• 제33권3호
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• pp.373-381
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• 2020

There is a need for newer feed additives due to legal prohibition on inclusion of growth promoting antibiotics in livestock diets in several countries due to antimicrobial resistance. In this context, rare earth elements (REE) have gained attention among animal nutritionists as potential growth promoters. Currently, several studies have reported better weight gain, milk production, egg laying capacity and feed conversion efficiency among different breeds of farm animals following supplementation with REE, with however largely inconsistent results. Furthermore, REE supplementation has also shown to improve ruminal fibrolytic and proteolytic activities as well as flavor of meat with negligible residues in edible tissue, however the mechanism behind this action is still unclear. According to existing research, due to their poor absorption and similarity with calcium REE might exert their action locally on gut microbial populations within the gastrointestinal tract (GIT). Moreover, REE have also shown anti-inflammatory, anti-oxidative as well as immune stimulating effects. The present review aims to broaden the knowledge about use of REE as feed additives for livestock and sum up efficacy of REE supplementation on performance and health of animals by comparing the findings. Till date, researches with REE have shown properties that make them a promising, new and safe alternative feed additive but further exploration is recommended to optimize effects and clarify discrepancy of various results before practical proposals can be drafted.

• 한국도서관정보학회지
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• 제8권
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• pp.69-96
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• 1981

We all know that we can not keep a proper social life without language. Yet language is so much a part of our environment that we hardly realize it is there. The purpose of this study is to provide an understanding of the linguistical aspect of communication process in order to carry out a successful human relations in the operation of libraries. Human development rests upon man's capacity to digest large quantities of knowledge and it is language which allows facts to be communicated, stored, and disseminated. An attempt was made in this study to illustrate the elementary meaning-of-words aspect of communication. In order to share the most commonly agreed meanings in interpersonal communication, a careful study of semantic noises is important. In a constant struggle to meet client needs, staff and administrators, librarian must understand communication dialogues, their messages and be able to read all level of meanings. In order to perform a successful function of the librarian, to act as a link-man or communicator and to cope with its ever growing information, it is suggested that the deep understanding of the following linguistical aspect of communication elements is essential. 1. Characteristics of Language: (1) Words have different meanings to different people. (2) Words vary in the degree of abstraction. (3) Language is incomplete by its nature. (4) Language reflects not only the personality of the individual but also the culture of man's society. 2. Noises in transmitting meanings: (1) Mechanical or Technical noises. (2) Semantic Noises (3) Noises caused by the psychological factors a. attention b. perception, sensation, cognition and perceptual field. 3. Linguistic Stratum Languages differ considerably in vocabulary by the physical and cultural environment setting as well as situation of individual living. There are seven different language stratum which reflects different region, sex, age, profession, special social stratum, academic and tabooed words.

• 한국콘텐츠학회논문지
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• 제18권10호
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• pp.527-544
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• 2018

도시는 다양한 콘텐츠를 담고 있는 유기적 존재로써 특히 최근에 관심을 받고 있는 도시재생은 콘텐츠 개발을 통해 경쟁력을 강화하는 사업이다. 따라서 도시의 경쟁력 있는 콘텐츠 개발을 위해 도시재생 사업의 내용과 기대효과를 살펴볼 필요가 있다. 본 연구에서는 11곳의 근린재생형 선도지역의 마중물 사업의 사업내용과 기대효과를 유형화하고 분석하였으며, 결과는 다음과 같다. 첫째, 마중물 사업의 사업내용은 물리적 재생이 가장 많으며 기대효과는 사회적 효과가 가장 많았다. 둘째, 사회적 재생의 사업은 주민의 역량강화를 위한 사업이 주를 이룬다. 셋째, 물리적 재생의 기대효과에서는 경관개선에 관한 기대효과가 많았으며, 넷째 사회적 기대효과에서는 도시재생의 기본 개념인 주민참여에 관한 내용이 많았음을 알 수 있다. 마지막으로, 단일 효과보다는 사업의 효과를 복합적으로 기대할 수 있는 사업개발이 필요하다. 향후 도시재생 뉴딜사업에서는 마을 고유의 자산을 활용하고 경쟁력 있는 도시콘텐츠 개발에 기반하며 다양한 효과가 나타날 수 있는 사업에 대한 연구가 필요하다.