식민지혁명에세의 민족부르조아지의 지위론

이병천 한국사회경제학회 1988 사회경제평론 Vol.- No.1

새로운 肥料 및 土壤改良劑處理가 양배추 收量에 미치는 影響

李炳天,金德鉉,金炅濟 동국대학교 대학원 1975 大學院硏究論集-東國大學校 大學院 Vol.5 No.-

The effect of new organic fertilizers and soil improver in increasing the quantitative characters of cabbage in spring seeding was studied. 1. N+P+K+Compost and Miwon liquid organic fertilizer was increased the number of out leaves, weight of out leaves, leaf length and leaf width, But next to organic manure cake, VS₃₄, Amino Acid by product A, and Amino Acid by product B. 2. Head length and Head width treated with N+P+K+Compost and Miwon liquid organic fertilizer had largest head size among the treatments. But next to VS₃₄, Amino Acid by product A and organic manure cake. 3. Yields treated with Amino Acid by product B was increased yield 46.4% than the check plot(N+P+K). But next to N+P+K+Compost, Amino Acid by product A and Miwon liquid organic fertilizer.

Occurrence of bisphenols and phthalates in indoor dust collected from Korean homes

이병천,윤효정,이병우,김필제,문효방,김영훈 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.99 No.-

Indoor environments are a major source of exposure to contaminants for children owing to long indoorresidence time. In particular, endocrine-disrupting chemicals, such as bisphenols and phthalates, whichare widely used in household products, are one of the major contaminants in indoor air or dust. Bisphenols and phthalates are ubiquitous in consumer products including toys, packaging, andcosmetics. We investigated the occurrence of 8 bisphenol and 16 phthalate analogues in the indoor dustcollected from 49 houses in Korea. The results showed that the concentrations of bisphenol A (BPA) and di(2-ethylhexyl)phthalate (DEHP) were the highest in indoor dust. This was due to the large productionvolume and relatively low vapor pressure of these compounds. Finally, we attempted tofind a correlationbetween the BPA and DEHP concentrations in indoor dust. A boomerang-shaped pattern was observedbetween the DEHP and BPA concentrations. It was concluded that the high concentration of DEHP in onepart of the boomerang curve might be due to the increase in the usage of plastic products with age.

영어교과 교육과정평가에 대한 중등학교 영어교사들의 인식

이병천,김희경 한국영어어문교육학회 2018 영어어문교육 Vol.24 No.4

School-based curriculum evaluation has been one of the core issues in curriculum planning, implementation, outcome, and feedback of the holistic curriculum process to next curriculum planning stage. In line with the significance of the curriculum evaluation, the research in the field of subject specific curriculum evaluation should be conducted for English teachers to customize their unique curriculum evaluation. Under this situation, this study has attempted to explore the secondary school English teachers’ perceptions on the significance degree of curriculum evaluation criteria, drawing implications for setting curriculum evaluation criteria. To achieve this purpose, the order of the criteria was analyzed by using Likert scale, and analysis of variance, and Scheffė post-hoc test were employed. The analysis revealed that, first, the curriculum evaluation criteria and components should be selected by reflecting subject teachers’ perceptions when applying it into school-level curriculum evaluation. Second, certain evaluation criteria was perceived more significant in a specific school level or school scale, suggesting that the curriculum evaluation criteria needs to be differentiated by each variable such as school-level or school-scale. A couple of suggestions were made for further research in this area such as an introduction of various research methodologies, and ways of developing and strengthening curriculum evaluation autonomy.

시간기반 난수화를 이용한 토큰인증의 강화

이병천 보안공학연구지원센터(JSE) 2017 보안공학연구논문지 Vol.14 No.2

패스워드 기반 인증[1]은 사용자의 기억에 의존하는 인증방식으로 시스템 구현이 간단하여 컴퓨터 산업의 태동시부터 널리 사용되어져 왔다. 토큰 인증[2][3]은 서버가 발급한 특정 토큰을 소유하고 있 다는 것을 보임으로써 사용자를 인증하는 방식으로 오늘날의 대규모 웹서비스 환경에서 서버의 부담 을 줄여줄 수 있다는 효용성이 있어서 자동로그인 방식으로 널리 사용되고 있다. 그러나 이러한 인증 방식은 고정된 패스워드나 토큰이 통신로를 통해 평문으로 반복 전달되기 때문에 도청공격 등으로 노출될 수 있는 위험이 있어서 반드시 암호화된 통신 환경에서 사용되어야 한다. 고정된 패스워드 인 증의 취약성을 해결하기 위해 TOTP(Time-Based One-Time Password)[4] 방식이 사용될 수 있는데 이 것은 매 로그인시마다 공유되고 있는 고정된 패스워드와 현재의 시간정보를 입력으로 하여 난수화된 로그인 정보를 생성하여 제출하게 하는 것으로 도청공격에 대응할 수 있게 하였다. 이 논문에서는 TOTP의 난수화 방식을 일부 응용하여 현재 널리 사용되고 있는 웹서비스에서의 고 정된 토큰 인증을 시간정보를 이용하여 난수화할 수 있는 방법을 제시한다. 이를 이용하면 토큰인증 정보가 시간에 따라 달라져서 도청공격을 무력화시킬 수 있다. 이러한 방법론은 기존에 사용되던 JWT[3] 토큰 인증 시스템을 약간 수정하여 난수화된 자동로그인을 제공할 수 있다는 장점이 있다. Password-based authentication[1] depends on human’s memory and is simple to implement that it had been widely used in the real world from the beginning of computer industry. Token-based authentication[2][3] is an authentication of user by showing that the user possesses a specific token that was issued by the server, and it is widely used to implement auto login in current massive web service environment since it can greatly reduce server’s workload. But in these authentication protocols fixed information is sent to the server repeatedly over the communication channel that it is subject to eavesdropping attack, thus these authentication protocols have to be executed over a secure communication channel such as SSL/TLS. To solve these eavesdropping attack TOTP(Time-based One Time Password) [4] protocol can be used which produces randomized authentication information depending on shared password and current time. In this paper we propose a new randomized token-based authentication protocol by using TOTP approach to modified token-based authentication. This protocol can thwart eavesdropping attack since the authentication information changes depending on time. This approach can provide randomized token- based authentication with simple modification of traditional JWT authentication.

국제 비교를 통한 국가 교육과정 적용체제 개선 연구: 싱가포르를 중심으로

이병천 한국교육과정평가원 2015 교육광장 Vol.57 No.-

거대한 위기와 전환의 정치 – 지속가능한 생태복지국가로 가는길

이병천 한국공공사회학회 2021 공공사회연구 Vol.11 No.1

Restructuring Achievement Standards in National English Curriculum

이병천 한국영어어문교육학회 2020 영어어문교육 Vol.26 No.1

This study aims to select three main issues in the field of 2015 English national curriculum focused on Achievement Standards (AS) and provide ways of improving AS structure. To achieve this purpose, Focus Group (FG) Method and literature review are employed. A total of 11 FG members are participated from February 2019 to September 2019 for six months in five time group meetings. Data collection was conducted through discussions in FG meetings, and relevant literature review was also conducted and discussed in the process of the FG meetings. The major opinions provided from the FG meetings were mainly selected as supporting data to reconstruct the AS format. CEFR and ACTFL descriptors are analyzed to draw implications to redesign the connectivity of AS in grades three to nine. The results show three issues and respective ways of improving AS structure; the need to employ cultural AS in alignment with objectives of English curriculum, reformat of the AS in vertical dimension connecting grade levels shown in the Singapore curriculum, and comprehensive AS descriptors at the end time of each grade cluster level

한우의 신속한 증식을 위한 번식기술 개발에 관한 연구 1 : 한우 번식실태 및 의 난소실질 내 투여효과

이병천 韓國受精卵移植學會 2000 한국동물생명공학회지 Vol.15 No.1

The purpose of this study was to develop a breeding technique to increase Hanwoo of superior characteristics. In the present study, reproductive status of Hanwoo such as size of farm, breeding system and gestationi length was investigated. In addition, effect of low dose administration of prostaglandin F2(PGF2) on luteolysis was examined. The size of farm was classified by the total number of cows and the number of breeding stocks, respectively. The distribution of herd size of < 5, 6~10, 11~30, 31~50 and > heads was 31%, 15%, 39%, 4% and 11%, respectively. Furthermore, the distribution of breeding stock size of <5, 6~10, 11~30, 31~50 and > 50 heads was 36%, 28%, 31%, 3% and 3%, respectively. Average parity was 2.1 in breeding stock. In breeding pattern, artificial in semination(A.I), estrus synchronization-A.I and natural mating was 92.7%, 2.4% and 4.9% respectively. Gestational length of Hanwoo was ranged 253~316 days (average length : 285 days) after estrus( estrus=0). To induce luteolysis, PGF2 was injected into ovarian parenchyma by a modified ovarian injector. The effect of administration of 6mg PGF2 on luteolysis and estrus induction was betweer (P<0.01) when PGF2 was administered into ovarian parechyma than when administered intramuscluarly (71 vs. 91%). When PGF2 was injected into ovarian parenchyma, a decreased concentration to 3 mg did not significantly decreaed its luteolytic effect(92%). When AI was performed following PGF2 treatment, the intraovarian injection group yielded a higher pregnancy rate(69 vs. 88%) than the IM injection groups, regardless of the dosage. In conclusion these results suggest that increasing herd size and regular reproductive management are needed to improve reproductive efficiency in Hanwoo industry. Furthermore, intraovarian administration of PGF2 is effective way to induce luteolysis compared with intramuscular injection.

삼성전자의 축적방식 분석세계화 시대 한국 일류 기업의 빛과 그림자

이병천,정준호,최은경 한국사회과학연구회 2014 동향과 전망 Vol. No.

Some findings of this paper are summarized as follows. First, SamsungElectronics has pursued the strategy of ‘financial market-friendly new developmentalism’where its competitiveness due to a high degree of investmentthrough tangible capital and R&D investments has been upgraded. Second,Samsung Electronics has adopted the strategy of vertical integration inwhich a strict SCM has been done across suppliers and though which a seriesof production has been undertaken across them and the costs and risks incurredtended to be externalized and transferred to them. Finally, looking atthe regime of distribution, the mechanism through which the success and resultantcompensation of Samsung Electronics are spread all over the stakeholderhas been very vulnerable and deepened the gap between insiders andoutsiders. Capitalizing upon these findings, some implications are suggested. 삼성전자는 반도체 분야 1차 추격 성공에 이어 2008년 세계 금융 위기 이후 2차추격 성공을 달성했다. 단기수익 추구에 얽매이지 않고 일급 제조기업의 투자 전략을 추구하며 성장성과 수익성을 조절했으며, 핵심공정을 자체 생산하는 수직계열화전략과 협력업체까지 포함하는 철저한 공급망 관리를 추구했다. 하청업체 관리의 핵심은 생산의 일체화, 비용과 위험의 외부화에 있다. 이렇게 삼성전자는 재벌 내부경제의 이점을 활용하는 한편 비용, 위험, 책임을 부품업체에 전가하며 공생의 생태계와 외부경제 발전을 억압했다. 분배면에서 삼성전자 이익이 다수 이해당사자에게 파급되는 기제는 취약하며내부자와 외부자 간의 격차와 분단은 심화되었다. 주주들은 배당보다 급등한 주가차익으로 이익을 얻었다. 주식보유계층구조상 이는 거의 1% 잔치에 불과하다. 주요 노동지표들은 크게 악화되었다. 협력업체 이익률은 삼성전자와 극심한 격차를 보일 뿐더러 이전 시기보다 낮아졌다. 삼성전자 실효법인세율은 법정 최고세율의 절반수준에 불과했다. 삼성전자가 민주적 책임기업으로 거듭나려면 노동자, 협력 중소부품업체 등과 상생할 수 있는 연계고리가 만들어져야 한다.