Han-ho Kim

This study uses a single-country gravity model approach to analyze the main factors affecting the trade flows of five fruit products in Korea. The empirical model is applied with the trade data for the period 1991-2007. The study constructs and estimates a random-effect panel tobit model. The results reveal that fruit trade in Korea is influenced by the trade partner's per capita GDP, distance from Korea, and the number of Korean immigrants. Unlike the existing works, distance is negatively corr

Potential size of Market for horse riding activity is estimated in the situation that no empirical data is available. The estimation is based on Ordered Response Model with consumers survey data. Results indicate that the potential market size is pretty considerable and raising the degree of consumer's recognition of horse riding activity through public relations is important in order to expand the market size.

Korean agriculture has been facing several structural problems resulting from rapid structural changes since 1960's, some of which are preventing a smooth policy reform in accordance with the WTO regime. Political burden from rice monoculture, policy ineffectiveness from too large farm employment, and inflexibility in policy options from high dependency of farm household income on farm income are pointed out and discussed in detail.

In this study, the physicochemical changes related to fishy smell were determined by storing high hydrostatic pressure (HHP)-treated mackerel (<i>Scomber japonicus</i>) meat in a refrigerator for 20 days. The inhibition of crude urease activity from <i>Vibrio parahaemolyticus</i> using HHP treatment was also investigated. The mackerel meat storage experiment demonstrated that production of trimethylamine (TMA) and volatile basic nitrogen (VBN), the main components of fishy smell, was significant

스마트그리드는 태양광 발전을 포함한 신·재생에너지의 발전량을 예측하고 이를 기반으로 효율적인 전력 생산과 소비를 가능하게 한다. 기존 태양광 발전량 예측 연구들은 시계열에 뛰어난 순환신경망 기법들을 적용 및 비교한 연구가 거의 없다. 또한 학습에 사용되는 과거 데이터의 길이에 대한 고려가 없어 모델의 예측 성능이 떨어졌다. 본 연구에서는 임베디드 변수 선택 기법을 이용하여 태양광 발전에 영향을 미치는 요인을 찾아내고, 시계열 순환신경망 기법들(RNN, LSTM. GRU)에 다양한 과거 데이터 길이를 넣는 실험을 진행하였다. 이 과정에서 가장 뛰어난 성능을 보이는 예측 요인들을 찾고 예측 모델을 설계하였다. 설계한 태양광 발전량 예측 모델은 다른 변수 설정을 사용할 때와 비교하여 더욱 뛰어난 예측 성능을 보이는 것을 확인하였다. 또한 기존 연구들과의 비교를 통하여 본 연구에서 개발한 태양광 발전량 예측 결과가 더 뛰어난 성능을 보이는 것을 확인하였다.

포켓몬고 게임이 인기를 끈 후 증강현실 게임의 인기는 기존보다 높아지고 있다. 이에, 게임 엔진중 하나인 유니티엔진을 사용하여 증강현실 게임을 만드는 방법에 대하여 설명한다. 특히 증강현실의 기술 중 MARKER가 필요 없는 MARKERLESS 방식을 선택하여 게임에 최적화된 증강현실을 구현하는 방법을 이용하였다. 본 논문에서는 유니티엔진과 유니티를 지원하는 KUDAN AR엔진을 활용하여 MARKERLESS 방식의 증강현실 게임을 제작하는 기법을 '우리동네히어로' 프로젝트를 통하여 제안한다. 이 제안을 위해 실행 가능한 버전을 제작하여 테스트하였으며, 이 연구를 통해 KUDAN 엔진의 MARKERLESS 방식으로 게임을 제작하는 경우 손쉽게 증강현실의 다양한 기능을 적용할 수 있다는 것을 밝혀냈다. After the Pokemon game became popular, the popularity of the Augmented Reality game is higher than ever.

We investigated the effects of policy reform, industrial transformation, and initial conditions on the agricultural productivity changes in 28 transition countries. Our findings are: (i) Asian and CEE transition countries performed better than CIS countries, while the performance improvement of CEE countries seems to be more prominent compared to that of Asian and CIS countries; (ii) The technical progress proved to be the main source of productivity growth, particularly in CEE countries; (iii)

The purpose of this study was to investigate children's(K-5) conceptions about light in Korea. The two aspect of children's conceptions about light were identified : the sources of light, the nature of vision. Data were collected from 92 children by a mixture of writing, drawing and interview, and were analysed by systematic networks. The major findings of this study were as follows : 1. Children showed an awareness of a wide variety of sources of light. The predominant sources exampled by child

The purpose of this study was to analyze science teaching models: Cognitive Conflict Teaching Model(CCTM), Generative Learning Model(GLM), Learning Cycle Model(LCM), Hypothesis-Testing Model(HTM), and Discovery Teaching Model(DTM). Using literature review, the models were analyzed and compared in several aspects; philosophical and psychological bases, primary goals and assumptions, syntax, implementation environments, and probable effects. The major finding were as follows; 1. Science teaching m

Despite many common features in agricultural sector, Korea and Japan have passed through quite different paths of structural adjustment. An important consequence of the different structural adjustment paths is full-time vs. part-time based farming system. As far as policy reforms are concerned, full-time based Korean agriculture has much more barriers to smooth policy reform mainly due to the income-related problems. With high level of off-farm income, farm household income problem is not a grea

Relying on frontier production approach (e.g., Luenberger's shortage function), we investigated the performance of agricultural sector in transition countries and its changes over time, especially focusing on the dynamics of productivity changes. We found that; (i) CEE countries have improved their performance during the sample period whereas CIS have not; (ii) productivity changes in the last decade was attributable to the technical progress; (iii) overall performance was decelerated for the se

The aims of this study are to analyze the patterns of energy consumptions in agriculture, forestry and fishery sectors (AFF sectors hereafter) and to identify the deterministic factors underlying the changes in the patterns during the last two decades, particularly since 1995. The analysis includes indirect energy consumptions in other sectors induced by the production of AFF sectors as well as direct energy consumptions in the sectors, which differentiates this study from previous ones. In addi

Knowledge spillover is a kind of externality originating from imperfect appropriation of R&D performances, which implies that the knowledge created by one agent could be transmitted to other related agents by affecting their R&D or other economic performances. For the estimation of knowledge spillover effects based on firm-level patent data between firms in bio-related industries, patents production function, as a proxy of knowledge production function, is formulated and estimated. Knowledge spi