교량 사용수명 100년을 위한 유지관리전략 연구

정유석,김우석,이일근,이재하,Jeong, Yoseok,Kim, WooSeok,Lee, Ilkeun,Lee, Jaeha 한국구조물진단유지관리공학회 2015 한국구조물진단유지관리공학회지 Vol.19 No.3

폴리염화비닐관의 장기수압내구성 사전적합성 평가방법 연구

정유석,서유정 한국신뢰성학회 2022 한국신뢰성학회 학술대회논문집 Vol.2022 No.7

정신건강서비스 환경에서 근무하는 정신장애인 동료지원 경험에 대한 연구

정유석,배진영,송승연 한국장애인복지학회 2023 한국장애인복지학 Vol.62 No.62

This study explored the experiences of peer supporters with psychosocial disabilities working in mental health service settings, focusing on their roles and jobs in peer-led organizations and mental health service facilities. FGIs were conducted with 21 peer supporters in five groups, representing different organizations where peer supporters work. Four themes emerged from the FGI analysis. 1) Roles from distinction of peer supporter, 2) Overcoming the works of peer supporter within difficulties, 3) Wide variation of working environment between each organization, 4) Measures to secure the position of a peer supporter The practical and policy implications of this study are as follows. First, the role and jobs of peer supporters were found to be unique and different from existing mental health services. Second, the challenge of job of peer support is identified and It became clear that training is needed. Third, peer supporters as a profession were found to be in a structurally poor situation and required a stable working environment. Fourth, the vagueness of the peer peer supporter's job duties diminishes the meaning of peer support, so a clear role and identity for the peer supporter is required. Fifth, peer supporters need to be provided with reasonable accommodation to facilitate the performance of their jobs and roles. Finally, peer supporters can be activated as part of the "Providing reasonable accommodation" in any organization where people with psychosocial disabilities are present.

소득세 격차 비교를 통한 근로소득과세 개선방안 연구

정유석 한국산업경제학회 2018 산업경제연구 Vol.31 No.1

Korea’s current income tax is operated with the progressive structure. The tax burden in such a progressive structure type tax burden is known to demonstrate the function of income redistribution by income bracket. However, upon looking at Korea’s actual income tax burden level, it is very low, compared with major OECD member countries, and the ratio of tax revenue to total taxes is low. The fundamental cause of such a low income tax burden is regarded as stemming from tax support, such as various items’ tax exemption on taxation objects, income deduction, tax reduction, and tax credit. The application of extensive tax support causes a problem sharply decreasing the effective tax rate of income tax, because quite a number of tax payers are converted into the tax exempted, as well as due to low tax burden through tax credit and tax reduction, although many tax subjects remain tax payers. Such a problem on the ratio of the tax exempted, brings about weakening income tax revenue and the income tax redistribution function. In such a situation, the progressive structural function for income redistribution cannot be demonstrated. This study presents implications on Korea’s taxation of earned income tax and a future improvement direction through a comparative analysis on the changes in yearly tax burden, according to wage earners’ income level of major OECD member countries and Korea in relation with such problems of the earned income tax system. As a result of the analysis, the measures to improve are as follows: first, decrease in deduction rate by section of earned income tax deduction. second, deduction mode shift by deduction item or deduction limit adjustment. third, the decrease of standard tax deduction. 우리나라의 현행 소득세는 누진구조로 운영되고 있다. 일반적으로 이러한 누진구조 방식의 세부담은 소득계층별 소득재분배 기능을 잘 발휘해주는 것으로 알려져 있다. 그러나 우리나라의 소득세 실질 부담수준을 보면 주요 OECD 국가들에 비해 매우 낮은 편이고 총조세 대비 세수비중도 낮은 편이다. 이처럼 낮은 소득세 부담의 근본적인 원인은 과세대상 소득에 대한 다양한 항목의 비과세와 소득공제, 세액감면 및 세액공제 등의 조세지원에 기인한다고 본다. 결국 광범위한 조세지원의 적용은 과세대상자 중 상당수가 면세자로 전환되거나 과세자로 유지되더라도 세액공제 및 감면 등에 의한 낮은 세부담으로 소득세 실효세율을 대폭 낮추는 문제점을 발생시키고 있다. 이러한 면세자 비중의 문제점은 소득세수 확보 및 소득세 재분배 기능의 약화를 가져오는 것으로 소득재분배를 위한 누진구조의 기능이 발휘될 수 없다는 것이다. 본 연구는 이러한 근로소득세제의 문제점에 대해 OECD 주요국들과 우리나라 근로소득자들의 소득수준에 따른 연도별 세부담의 변화를 비교·분석하여 우리나라의 근로소득 과세에 대한 시사점과 향후 개선방안를 제시하는 데 목적을 두고 있다. 또한 주요국들과의 소득세 격차 비교를 통해 우리나라의 소득세 면세자 비중의 문제점을 제시하고 있다는 점에서 기존연구와 차별성을 가진다. 본 연구의 분석결과 제시되는 개선방안들은 첫째, 근로소득공제 구간별 공제율 감소, 둘째, 공제항목별 공제방식의 전환 또는 공제한도 조정, 셋째, 표준세액공제 감소 등이다.

자유 공간 광통신 시스템에서 신호 변동 억제를 위한 전광 자동 이득 조절 어븀 첨가 광섬유 증폭기의 성능 평가

정유석,김철한 한국광학회 2022 한국광학회지 Vol.33 No.3

자유 공간 광통신 시스템에서 발생하는 대기 외란에 의한 광신호 변동을 억제하기 위하여 전광(all-optical) 자동 이득 조절(automatic gain controlled, AGC) 어븀 첨가 광섬유 증폭기(erbium-doped fiber amplifier, EDFA)를 활용할 때의 성능을 실험적으로 평가하였다. EDFA 에 입력되는 광신호 입력을 −30 dBm과 −10 dBm으로 각각 설정하여 증폭기가 소 신호 영역과 포화 영역에서 동작할 때의 성능을 실험적으로 비교하였다. 이 때 광신호의 요동은 음향 광학 변조기(acousto-optic modulator, AOM)를 활용하여 구현하였다. 실험 결과로부터 EDFA 가 소 신호 영역에서 동작하며, 피드백되는 증폭된 자발 방출(amplified spontaneous emission, ASE) 광 전력이 0 dBm으로 증폭기를 포화 시킬 수 있는 경우에 가장 작은 광신호 요동 특성을 얻을 수 있음을 확인하였다.

尹정부의 대북정책 『담대한 구상』 내용과 전망

정유석 북한연구소 2022 北韓 Vol.- No.609

YOLO-v5를 이용한 등검은말벌집 탐색 기술 연구

정유석,전문석,김수배,김동원,유승화,김경철,이시영,이창우,최인찬 한국양봉학회 2022 韓國養蜂學會誌 Vol.37 No.3

Vespa velutina, such as ecological disturbance wildlife introduced into Busan through Shanghai, China in 2003, is an ecologicla disturbance wildlife and difficult to find with the naked eye due to the nature of creating wasp nests in high places in the forest. In addition, its population increases every year, causing the economical damage to beekiipers (about 170 billion won). Therefore, the purpose of this study is to acquire images and explore the location of Vespa velutina based on artificial intelligence (AI) to easily remove Vespa velutina using drones. Differently from the ground images, aerial images have the characteristic that the objects become very small as the altitude rises, so it is necessary to study the appropriate image size that can be mounted on drones and can search Vespa velutina with AI. The AI model YOLO-v5 using four image sizes (640×384 px, 1,280×736, 1,920×1,088, 3,840×2,176) was applied in this study and the original size of the image (3,840×2,160) was used for learining and verification. When confidence was higher than 0.7, F1 score of YOLO-v5s-default (640) learned with image size 640×384 was 2.4%, YOLO-v5s-1280 was 36.5%, YOLO-v5s-1920 was 64.2% and YOLOv5s- 3840 obtained the best detection performance at 96.1%. In addition, the performance was confirmed when the verification image size was 3,840×2,176 in four AI learned with different image sizes. In this case, YOLO-v5s-default (640) had F1 score of 4.4%, YOLO-v5s-1280 was 7.1% and YOLO-v5s-1920 was 16.4% with no performance improvement. Therefore, this study found that the networks that are learned and validated using the aerial images larger than 640 showed the better performance. Continuous research on real-time information sharing and estimation of the location of the occurrence of Vespa velutina through data collection using drone systems will be carried out.

무엇이 과잉진료를 부추기는가?: 과잉진료의 원인 고찰과 대책

정유석,박석건 한국의료윤리학회 2016 한국의료윤리학회지 Vol.19 No.3

Overtreatment (or unnecessary treatment) occurs when medical services are provided with a higher volume or cost than is appropriate. Of course, practicing good medicine and avoiding unnecessary harm have always been principles of medical practice. Currently there is a new emphasis on reducing practices that are likely to have limited benefit or that involve potential harm. Waste due to overtreatment has been described as a violation of the principle of justice on the assumption that every system has limited resources and any wasted resource necessarily means those resources will no longer be available for use by others in need. Overtreatment may also cause direct harm to patients, thus violating the principle of nonmaleficence. Physicians are rarely motivated by the desire to achieve system efficiency or to save money for its own sake. However, it is widely understood that physicians should be motivated by a desire to do the right thing in terms of promoting the patient’s best interest. And doing the right thing includes an ethical imperative to provide parsimonious care. Recognizing this fact helps to bridge the enormous quality chasm that still exists between the medical care that is currently provided and the medical care that should be provided. The purpose of this study is to identify and assess the factors that cause overtreatment (unnecessary treatment) in the Korean medical system and to suggest certain solutions to this problem. 과잉진료(불필요한 진료)는 의료서비스를 적정한 선 이상으로 제공하는 것을 말한다. 좋은 진료를 제 공하고 불필요한 해악을 피하는 것은 의료의 기본이다. 최근 이익이 적고 해악이 많은 진료를 지양하는 적정진료의 필요성이 강조되고 있다. 과잉진료는 제한된 자원의 낭비를 초래한다는 점에서 정의의 원 칙에 위배된다. 또한 환자에게 직접적인 손해를 끼치므로 해악금지의 원칙에 반한다. 의사들은 효율적 인 시스템이나 자신의 경제적 욕구가 아니라, 환자의 최선의 이익이라는 가치에 의해서 동기부여가 되 어야 한다. 하지만 현실적인 제약으로 인해 실제 진료와 이상적인 진료 사이의 간격은 점점 벌어지고 있 다. 본 논문에서는 과잉진료가 환자의 이익보다 자신의 경제적 이득을 추구하는 의사들의 문제라는 단 순한 도식만으로는 이해될 수 없다는 것을 밝히고, 과잉진료의 유형과 다양한 원인들을 고찰한 다음, 과 잉진료원인을 행위의 주체에 따라서 분류함으로써, 각 주체들이 문제의 해결을 위해 기여해야할 각각 의 몫들이 있음을 지적하고자 하였다. 그리고 이런 일이 가능하도록 주도적으로 작용해야 하는 것은 의 사, 의사단체라는 점을 강조하였다.

궐련형 금연보조제(금연초)와 니코틴 패치의 금연효과

정유석 대한가정의학회 2003 Korean Journal of Family Medicine Vol.24 No.11

The Efficacy of Herbal Cigarettes (Kumyeoncho) and Nicotine Patches in Smoking CessationYoo Seock Cheong

위해감축의 관점에서 본 전자담배

정유석 대한의사협회 2020 대한의사협회지 Vol.63 No.2

One person dies every six seconds from a smoking-related disease and this problem is likely to worsen. While many people try to quit smoking on their own or with using medicinal products, many of them fail. There is an ongoing debate within the public health community about e-cigarettes on whether they have a potential role in smoking cessation, whether their use can reduce harm for individual users, whether the widespread use of these devices has the potential to reduce or increase population-level harm, and how best to regulate e-cigarette use to minimize both individual and population-level harm. Although the long-term effects of e-cigarette use among smokers and non-smokers are not known, nicotine aerosol produced from a solution, rather than from burning tobacco, releases fewer harmful substances than cigarette smoke does. Some experts advocate wider availability and softer regulations regarding e-cigarette use and perceive them as having the potential to help smokers quit or switch to a harmreducing means of consuming nicotine. Based on scientific evidence on e-cigarettes, this article explores its pros and cons to public health in order to guide practice, policy, and regulation through reviews of debate articles. ‘Quit or die’ is no longer the only option for those who cannot quit. Safer nicotine products offer another way. There is substantial international and independent evidence that these products are safer than cigarettes.