Measurement and Interpretation of Undergraduate Students' Writing about the Experiments of the Photoelectric Effect

JHO*, Hunkoog,JI, Youngrae Korean Physical Society 2018 New Physics: Sae Mulli Vol.68 No.11

고등학교 사회과 다문화 수업 프로그램이 학생들의 간문화적 태도에 미치는 영향 연구

조대훈(Daehoon Jho),이주영(Jooyoung Lee) 성신여자대학교 교육문제연구소 2011 교육연구 Vol.52 No.-

본 연구의 목적은 고등학교 방과후 다문화 수업 프로그램이 학생들의 다문화적 태도, 특히 간문화적 감수성(Intercultural Sensitivity)에 대해 가지는 영향을 분석하는 것이다. 이를 위해 연구자는 10시간 분량의 다문화 수업 프로그램을 설계하였다. 그리고 이 다문화 수업 프로그램을 다문화교육에 관심을 가진 서울 소재 사립 고등학교 사회과 교사의 도움을 얻어 개설한 ‘다문화사회 이야기’라는 방과 후 수업에 적용하였다. 연구자가 개발한 다문화 수업 프로그램이 학생들의 간문화적 태도에 변화를 가져왔는지 알아보기 위해 Hammer, Bennett & Wiseman(2003)의 ‘간문화적 발달 측정 척도(Intercultural Development Inventory, IDI)에 기초한 설문 조사를 실시하였다. 설문 자료 분석 결과, 본 연구에 포함된 간문화적 감수성의 하위 영역 4개 중에서 부정/방어(Denial/Defense), 최소화(Minimization) 및 수용/적응(Acceptance/Adaptation)의 3개 영역에서 통계적으로 유의미한 차이가 발견되었다. 이와 같은 결과는 연구자의 다문화 교육 수업 프로그램이 학생들의 다문화적 태도에 긍정적인 변화를 가져온다는 점을 보여줌과 동시에, 현행 사회과 교육과정에 적용가능한 다문화 교육과정의 내용과 방법의 개발에 긍정적인 시사점을 제공하고 있다. The purpose of this study is to examine the effects of the after-school multicultural lesson, “The Tales of A Multicultural Society” on students’ intercultural sensitivity. Based on the pedagogical model of multicultural education developed by Jho & Park (2009), “the Tales of A Multicultural Society” consisted of 10 instructional lessons (50 minutes per each) and was implemented in a local private girls’ high school in Seoul. The researchers monitored the entire lessons and conducted in-depth interviews with selective students. Then, in order to measure students’ intercultural attitudinal change, the Intercultural Development Inventory (IDI) survey of 50 items were administered to 40 students twice, on the first day of the course and 4 weeks after the completion of the course. In sum, the study found that overall the multicultural education course the researchers designed had a statistically positive impact on students’ intercultural sensitivity. The findings of the study request for further research and continuous investment on developing multicultural pedagogical knowledge and strategies.

시뮬레이터 컨버터에 의한 인버터 성능시험에 관한 연구

조정민(J.M. Jho),조주현(J.H. Jho),김성남(S.N. Kim),이승환(S.H. Lee),오봉환(B.H. Oh),이훈구(H.G. Lee),김용주(Y.J. Kim),한경희(K.H. Han) 대한전기학회 2002 대한전기학회 학술대회 논문집 Vol.2002 No.7

다중 제어루프에 의한 DC-DC 전원장치에 관한 연구

조주현(J.H. Jho),정정훈(J.H. Chung),조정민(J.M. Jho),김길동(K.D. Kim),이승환(S.H. Lee),이훈구(H.G. Lee),김용주(Y.J. Kim),한경희(K.H. Han) 대한전기학회 2003 대한전기학회 학술대회 논문집 Vol.2003 No.7

The Social Studies Curriculum in Korea : Characteristics, Issues, and Prospects

Jho, Daehoon 이화여자대학교 교과교육연구소 2017 교과교육학연구 Vol.21 No.3

The main purpose of this study is to analyze the history and characteristics of the national social studies curriculum in Korea, with a special focus on the 2015 Revised Social Studies Curriculum. Based on the introduction of the current framework of social studies curriculum and a brief chronological outline of the national curriculum revision over the past 60 years, this study illustrated key features of the 2015 Revised Social Studies Curriculum. In sum, looking at the contemporary history of national curriculum revision, the social studies curriculum was characterized by ‘instability’ due to the lack of a long-term view in curriculum design, and due to a strong tendency to separate instead of integrate subject matter across its major content areas. The analysis of 2015 Revised Social Studies Curriculum demonstrates that the 2015 revision is differentiated from the previous versions in terms of 1) the integrative approach to the core courses, 2) an increased emphases on the themes of multiculturalism and global awareness, and 3) the special attention given to education for ‘territory’ and ‘financial literacy.’ Finally, three persistent issues underlying Korea's social studies curriculum--namely, strong state control over the curriculum, detrimental effects of the micro-politics of social studies subjects, and the gap between national curriculum and teacher preparation—were discussed in relation to its future direction.

Perceived timeliness of referral to hospice palliative care among bereaved family members in Korea.

Jho, Hyun Jung,Chang, Yoon Jung,Song, Hye Young,Choi, Jin Young,Kim, Yeol,Park, Eun Jung,Paek, Soo Jin,Choi, Hee Jae Springer International ; Springer 2015 Supportive care in cancer Vol.23 No.9

<P>We aimed to explore the perceived timeliness of referral to hospice palliative care unit (HPCU) among bereaved family members in Korea and factors associated therewith.</P>

Efficacy of pain education in cancer patients : A meta-analysis of randomized controlled trials

Jho, Hyun Jung,Myung, Seung-Kwon,Chang, Yoon-Jung,Kim, Dae-Hyun,Ko, Doo Heun Springer-Verlag 2013 Supportive care in cancer Vol.21 No.7

Public key broadcast encryption scheme using new converting method

Jho, Nam-Su,Yoo, Eun-Sun,Rhee, Man-Young Korea Institute of Information Security and Crypto 2008 정보보호학회논문지 Vol.18 No.b6

Broadcast encryption is a cryptographical primitive which is designed for a content provider to distribute contents to only privileged qualifying users through an insecure channel. Anyone who knows public keys can distribute contents by means of public key broadcast encryption whose technique can also be applicable to many other applications. In order to design public key broadcast encryption scheme, it should devise some methods that convert a broadcast encryption scheme based on symmetric key cryptosystem to a public key broadcast encryption. Up to this point, broadcast encryption scheme on trial for converting from symmetric key setting to asymmetric public key setting has been attempted by employing the Hierarchical Identity Based Encryption (HIBE) technique. However, this converting method is not optimal because some of the properties of HIBE are not quite fitting for public key broadcast schemes. In this paper, we proposed new converting method and an efficient public key broadcast encryption scheme Pub-PI which is obtained by adapting the new converting method to the PI scheme [10]. The transmission overhead of the Pub-PI is approximately 3r, where r is the number of revoked users. The storage size of Pub-PI is O($c^2$), where c is a system parameter of PI and the computation cost is 2 pairing computations.

Molecular and structural basis of low interfacial energy of complex coacervates in water

Jho, YongSeok,Yoo, Hee Young,Lin, Yanxian,Han, Songi,Hwang, Dong Soo Elsevier 2017 Advances in colloid and interface science Vol.239 No.-

<P><B>Abstract</B></P> <P>Complex coacervate refers to a phase-separated fluid, typically of two oppositely charged polyelectrolytes in solution, representing a complex fluid system that has been shown to be of essential interest to biological systems, as well as for soft materials processing owing to the expectation of superior underwater coating or adhesion properties. The significance and interest in complex coacervate fluids critically rely on its low interfacial tension with respect to water that, in turn, facilitates the wetting of macromolecular or material surfaces under aqueous conditions, provided there is attractive interaction between the polyelectrolyte constituents and the surface. However, the molecular and structural bases of these properties remain unclear. Recent studies propose that the formation of water-filled and bifluidic sponge-like nanostructured network, driven by the tuning of electrostatic interactions between the polyelectrolyte constituents or their complexes may be a common feature of complex coacervate fluids that display low fluid viscosity and low interfacial tension, but more studies are needed to verify the generality of these observations. In this review, we summarize representative studies of interfacial tension and ultrastructures of complex coacervate fluids. We highlight that a consensus property of the complex coacervate fluid is the observation of high or even bulk-like water dynamics within the dense complex coacervate phase that is consistent with a low cohesive energy fluid. Our own studies on this subject are enabled by the application of magnetic resonance relaxometry methods relying on spin labels tethered to polyelectrolyte constituents or added as spin labeled probe molecules that partition into the dense versus the equilibrium coacervate phase, permitting the extraction of information on local polymer dynamics, polymer packing and local water dynamics. We conclude with a snapshot of our current perspective on the molecular and structural bases of the low interfacial tension of complex coacervate fluids.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Complex coacervate fluid function critically relies on its innate low interfacial tension. </LI> <LI> Bifluidic, sponge-like, ultrastructure underlies low interfacial tension complex coacervate fluids. </LI> <LI> High, bulk-like, water dynamics within the dense complex coacervate fluid is consensus property. </LI> <LI> Low cohesive energy of the dense complex coacervate fluid is a unifying property. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Effect of co-presence of cadmium or procymidone with microplastic films in soil on lettuce growth

Jho Eun Hea,Yang Ji Won,Ju Won Jung,Lee Sung-Jong,Hasan Md Mehedee 한국응용생명화학회 2023 Applied Biological Chemistry (Appl Biol Chem) Vol.66 No.-

Agricultural environment is often contaminated with various chemicals (e.g., pesticides, heavy metals) and microplastics due to the uses of plastic products. The effects of chemical contaminants or microplastics on terrestrial environment have been extensively studied, but the studies on the co-presence of chemical contaminants and microplastics are relatively limited. This study was set to investigate the effect of co-presence of microplastics (i.e., low-density polyethylene (LDPE) and polyvinyl chloride (PVC) microplastic films) and chemical contaminants (i.e., cadmium (Cd) and procymidone (PCM)) in soil on the lettuce growth and Cd and PCM uptake by lettuce using pot tests. The lettuce leaf lengths were not affected by the presence of only Cd or PCM, but the rates of change in the lettuce leaf number were adversely affected by the presence of PCM. The presence of only LDPE or PVC in soil at the concentrations used in this study did not have significant impacts on the lettuce growth. But the co-presence of Cd and LDPE and the co-presence of PCM and PVC resulted in the negligible increases in the lettuce leaf length and leaf number with time, although the lettuce growths were statistically similar in the Cd- or PCM-contaminated soils regardless of the presence of microplastics. The results suggest that the adverse effects of Cd or PCM can be intensified by the co-presence of microplastics, and the effects can be different depending on the types of microplastics. The promoted adverse effects of chemical contaminants in the co-presence of microplastics can be supported by the tendency of the increased absorption of Cd or PCM by lettuce in the co-presence of microplastics. Overall, this study shows the need for management of both chemical contaminants and microplastics that may reside in the agricultural environment.