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Temperature Dependence of the Excitonic Energy Band Gap in In(Ga)As Nanostructures
Oleksii Kopylov,이정일,한일기,최원준,송진동,Ina Yeo 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.60 No.10
We analyzed temperature dependent variation of the peak energies in the photoluminescence of InAs/GaAs quantum dots and InAs/In<SUB>0.2</SUB>Ga<SUB>0.8</SUB>As/GaAs quantum dots in asymmetric well. The InAs dots were grown by migration-enhanced molecular beam epitaxy. The peak emission energies decreased monotonously with the increase of the temperature over the range of the measurements, from 13 K to 225 K. The temperature dependence of the peak energy was successfully fitted with two analytic models, namely, the phenomenological Varshni equation and the semi-empirical Fan equation based on electron-phonon statistics, respectively. The physical meaning of the Varshni coefficients is discussed in terms of phonon energy and strain in the nanostructures.
Building a Co-participatory Partnership Framework for School-visit STEAM Outreach Program
( Inae Kang ),( Jungwon Hwang ),( Jin Hye Jang ),( Eunsung Kang ) 한국교육공학회 2016 한국교육공학회 학술대회발표자료집 Vol.2016 No.1
This study aimed to provide a co-participatory partnership framework for a school-visit STEAM outreach program. The framework has been created through a STEAM outreach program practiced between an elementary school and an University hospital, in which 76 students with two teachers, and three medical doctors have participated during the fall semester of 2015. Data analysis collected from interviews and surveys with the participants showed highly positive responses to the program, which, in turn, reflects the usefulness of the framework. The STEAM outreach framework is basically a model of school visit which seems to ensure more possibility of sustaining the outreach program, compared to the models of organization visit more often experienced in most STEAM outreach programs. The framework, on one hand, assumes three pedagogical principles of STEAM (context-based, creative design, affective experience) in developing the STEAM outreach program, and the other hand, suggests three stages of management (planning, designing, and implementing), each of which describes specific roles of the participants, and things to consider for the outreach program management.
Human Crowd Influence Toward Impulsive Buying Decision
Ina Melati Indartoyo,Teddy Indira Budiwan 한국디지털융합학회 2020 디지털경영연구 Vol.7 No.1
The level of curiosity of the people in Jakarta towards new products looks quite high, especially in low involvement products, such as food and soft drinks. The interest of the people of Jakarta to try new products raise a phenomenon that is quite unique, namely; Crowd Phenomenon. This study aims to examine whether artificial crowds that being formed by human crowds can stimulate organic crowd more than the artificial crowd itself. This study also aims to determine whether artificial crowd can encourage impulsive purchases. This research is a quasi-experimental study with one treatment. Data was collected by distributing questionnaires to the same respondents before and after treatment applied to them. The treatment applied was in the form of artificial crowd. Then the collected data is processed using descriptive analysis to find the mode values for each question. The respondents were selected using Purposive Sampling Technique. Experiment testing resulted that human crowd
A Method for Comparing Multiple Bacterial Community Structures from 16S rDNA Clone Library Sequences
Inae Hur,천종식 한국미생물학회 2004 The journal of microbiology Vol.42 No.1
Culture-independent approaches, based on 16S rDNA sequences, are extensively used in modern microbial ecology. Sequencing of the clone library generated from environmental DNA has advantages over fingerprint-based methods, such as denaturing gradient gel electrophoresis, as it provides precise identification and quantification of the phylotypes present in samples. However, to date, no method exists for comparing multiple bacterial community structures using clone library sequences. In this study, an automated method to achieve this has been developed, by applying pair wise alignment, hierarchical clustering and principle component analysis. The method has been demonstrated to be successful in comparing samples from various environments. The program, named CommCluster, was written in JAVA, and is now freely available, at http://chunlab.snu.ac.kr/commcluster/.