SAR와 광학 영상을 이용한 동남극 Terra Nova Bay 폴리냐의 발달 특성 분석

김진영,김상희,한향선,Kim, Jinyeong,Kim, Sanghee,Han, Hyangsun 대한원격탐사학회 2022 大韓遠隔探査學會誌 Vol.38 No.6

Terra Nova Bay polynya (TNBP) is a representative coastal polynya in East Antarctica, which is formed by strong katabatic winds. As the TNBP is one of the major sea ice factory in East Antarctica and has a great impact on regional ocean circulation and surrounding marine ecosystem, it is very important to analyze its area change and development characteristics. In this study, we detected the TNBP from synthetic aperture radar (SAR) and optical images obtained from April 2007 to April 2022 by visually analyzing the stripes caused by the Langmuir circulation effect and the boundary between the polynya and surrounding sea ice. Then, we analyzed the area change and development characteristics of the TNBP. The TNBP occurred frequently but in a small size during the Antarctic winter (April-July) when strong katabatic winds blow, whereas it developed in a large size in March and November when sea ice thickness is thin. The 12-hour mean wind speed before the satellite observations showed a correlation coefficient of 0.577 with the TNBP area. This represents that wind has a significant effect on the formation of TNBP, and that other environmental factors might also affect its development process. The direction of TNBP expansion was predominantly determined by the wind direction and was partially influenced by the local ocean current. The results of this study suggest that the influences of environmental factors related to wind, sea ice, ocean, and atmosphere should be analyzed in combination to identify the development characteristics of TNBP.

OpenFOAM을 활용한 용융환원로 내 입자 거동 및 반응 해석

김진영(Jinyeong Kim),장권우(Kwonwoo Jang),허강열(Kang Y. Huh) 한국연소학회 2019 KOSCOSYMPOSIUM논문집 Vol.2019 No.11

Melter-Gasifier is generally used in alternative iron making process to produce liquid iron. To simulate Melter-Gasifier, we should consider not only complex motion of particles but also chemical reactions between coke, pulverized coal and oxygen. In addition, due to the high injection speed of oxygen, a cavity called raceway is created from the end of the oxygen lance. In this work, we conducted simulation of Melter-Gasifier using OpenFOAM with Discrete Element Method (DEM).

이념이 조세정책에 미치는 효과에 관한 연구

김진영 ( Jinyeong Kim ),이창구 ( Changgu Lee ) 한국정책학회 2011 韓國政策學會報 Vol.20 No.4

조세정책은 이념에 따라 정책의 내용이 차별되는 대표적인 정책분야로 알려져 있다. 민주주의국가에서 정당은 대소간 이념상의 차이가 존재한다. 따라서, 조세정책은 어떤 이념을 가진 정당이 집권하느냐에 따라 기조가 크게 영향을 받을 수 있다. 우리나라의 경우집권의 경험이 있는 정당은 크게 보수주의적 정당과 진보주의적 정당으로 양분된다. 이들 정당이 집권하는 동안 이루어진 조세정책 및 조치들이 당해 정당의 이념에 의해 어떻게 영향을 받았고, 차이가 있는지 규명하는 것이 본연구의 목적이다. 년도 별 조세정책조치, 조세부담률, 직접세/간접세비율 등 데이터를 t검정, 선형회귀분석, 로지스틱 회귀분석 등을 통하여 분석한 결과, 보수주의적 정당은 감세, 간접세중심, 조세의 효율성기능중시, 진보주의적 정당은 증세, 직접세중심, 조세의 분배적 기능 중시라는 가설이 대체로 채택되지만, 개별 세목에 따라서는 이념에 따른 조세정책의 차이가 명확하지 않은 경우도 발견되었다. 결론적으로, 이념은 조세정책에 영향을 미치는 중요요소임이 분명하나, 대외적으로 천명한 정책선호가 집권기간 중 항상 일관성 있게 정책으로 구현되는 것은 아님을 알 수 있다. Tax policy has been well known for its typical characteristic that it generates different view under different ideology. In a democratic nation, each political party tends to have different ideology. Thus, a nation's tax policy may be largely affected by the certain political party that comes to power. In Korea, the political parties that have ruled the nation are either conservative or progressive in their nature. The objective of this research is to determine how tax policy and the related measures have been affected by each ruling party's ideology and in what degree. Analysing the data such as each year's tax policy measures, ratio amount of taxes and direct/indirect tax ratio through such statistical analysis tools as t-test, linear and logistic regression analysis, the result supports the theory in general that conservative party lays more emphasis on indirect taxation, tax cut and tax efficiency while progressive side is direct tax-oriented and more concerned with tax raise and tax fairness. That being said, the result also indicates some tax items have ambiguous correlation with ideology-based tax policy. Consequently, ideology itself seems to be a critical factor in tax policy but the declared ideology preference doesn't always seem to bring about correlated policies throughout the ruling period.

공적 연금제도의 이론적 논쟁에 대한 고찰

김진영(Jinyeong Kim) 서울행정학회 2004 한국사회와 행정연구 Vol.15 No.1

There has been a lot of discussion going on about the reform of the social welfare system in the developing countries as well as in the developed countries. The case of South Korea is no exception to this trend. Although it has a short history of national pension system, it has already exposed many problems including fiscal crisis. This situation has resulted in various reform proposals from the government and academic sectors. A sheer number of reform proposals accompanied by lively discussion at home as well as abroad increases the difficulty of finding an appropriate reform plan. To deal with this problem, there has to be a deep discussion of the essentials. From this standpoint. this study derived income redistribution, government monopoly and coercion as the essential elements comprising the national pension system. With regard to each of the elements, this study has investigated various arguments and put them in perspective.

원격탐사 및 재분석 자료를 이용한 동남극 Terra Nova Bay Polynya의 형성과 발달 분석

김진영(Jinyeong Kim),한향선(Hyangsun Han) 대한지질학회 2022 대한지질학회 학술대회 Vol.2022 No.10

공교육에 관한 이론적 고찰

김진영(Jinyeong Kim),박성혜(Sunghye Park) 서울행정학회 2008 한국사회와 행정연구 Vol.19 No.3

This paper aims to study theoretical controversies on secondary education system from a perspective of classical liberalism. The Korean education is characterized by nationalization and equalization, which means no right for parents to choose schools for their children. This paper discusses pros and cons of public education system in terms of administrative values such as efficiency, equity and accountability. In terms of efficiency, equity and accountability, from a perspective of classical liberalism, the current education system does not deliver what it promises. It should be reformed in the direction of increased choice of the parents and the increased autonomy of schools.

Widevine DRM 보안 연구동향 조사

김민수(Minsu Kim),유선아(Seonah Yoo),최낙운(Nakun Choi),김진영(Jinyeong Kim),강성현(Seonghyeun Kang),김진영(Jinyeong Kim) 한국정보과학회 2022 한국정보과학회 학술발표논문집 Vol.2022 No.12

스마트 팩토리 보안 사고 유형 분석 및 대안 프레임 제시

김현진(Hyeonjin Kim),김진영(Jinyeong Kim),백주련(Juryon Paik) 한국컴퓨터정보학회 2018 한국컴퓨터정보학회 학술발표논문집 Vol.26 No.2

최근 제조업의 근로 시간 단축 및 전문 노동력의 감소로 인하여 발생할 수 있는 문제를 개선할 수 있는 스마트 팩토리(Smart Factory)가 주목받고 있다. 스마트 팩토리는 생산품의 불량률을 줄이고, 숙련공 없이 비숙련공만으로 현장 가동이 가능하다는 점 등의 긍정적 효과를 기대할 수 있다. 그러나 스마트 팩토리는 높은 설비 도입 비용, 업무 시스템 재설계 등의 문제점이 등이 있으며, 특히 보안의 취약성이 심각하다. 그렇기 때문에 많은 기업이 현실에서 스마트 팩토리를 도입하는 어려움을 겪고 있다. 본 논문에서는 스마트 팩토리의 다양한 보안 사고를 유형 및 정형화시키고 여러 보안 사고를 유발하는 취약한 부분을 구체화하여 스마트 팩토리의 보안 연구의 방향성을 제시하고자 한다.

Highly Efficient and Stable Perovskite/Si Tandem Solar Cells

지수근,박재현,김진영 ( Jinyeong Kim ) 한국공업화학회 2021 한국공업화학회 연구논문 초록집 Vol.2021 No.0

말하기 의사소통 활동에서 문자 언어 사용과 학습자의 문해력이 상호작용에 미치는 영향

이승민(Lee, Seungmin),김진영(Kim, Jinyeong) 한국초등영어교육학회 2020 초등영어교육 Vol.26 No.4

Attempts are being made to use written language in conjunction with spoken language in activities for speaking skills. These attempts are based on the expectation that the use of written language in activities for speaking skills can facilitate the interaction required for learning English and help to improve literacy. In this respect, this study investigated the effects of the use of written language in communicative activities for speaking skills in consideration of the literacy of elementary school students. In addition, elementary school students awareness of the use of written language linked to spoken language and their degree of literacy improvement were examined. Two types of communicative activities were designed for this study, and they were carried out under the conditions of spoken language only , written language as a supplementary means and written language as a required means . Twenty-four fifth graders formed a group taking into account their literacy levels and participated in the activities. In conclusion, the effects of using written language on interaction may depend on how written language is used in conjunction with spoken language and on the learner’s literacy level. Therefore, it is necessary to consider this point when designing activities for speaking skills that utilize written language.