• 한국초등과학교육학회지:초등과학교육
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• 제34권3호
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• pp.288-296
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• 2015

This study aimed to analysis of concepts and inquiry activities related to the 'Earth Science' area in the South Korean elementary school textbooks to the current and to seek the improvement of future textbook. For the study, we were collected South Korean elementary school textbooks to the current. After the collection had been made, we were analyzed related to the 'Earth' area in the South Korean elementary school textbooks and were extracted central concepts and inquiry activities. The result of this study: First, there were 'A change in the land', 'Strata and Fossil', 'Volcanoes and Earthquakes', 'Earth and Moon', 'The weather', 'The Solar system and the Star', and 'Seasonal Change' in the central concepts related to the 'Earth' area in the South Korean elementary school textbooks to the current. Second, central concepts were almost the same but the curriculum was changed. Third, inquiry activities also were confirmed to be maintained with little change. This result was believed that it can provide a variety of suggestions at this point in changing the curriculum.

• Journal of information and communication convergence engineering
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• 제12권1호
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• pp.33-38
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• 2014

This paper investigates the shaping operation problem introduced by Callahan et al., namely the k-fragility maximization problem (k-FMP), whose goal is to find a subset of personals within a terrorist group such that the regeneration capability of the residual group without the personals is minimized. To improve the impact of the shaping operation, the degree centrality of the residual graph needs to be maximized. In this paper, we propose a new greedy algorithm for k-FMP. We discover some interesting discrete properties and use this to design a more thorough greedy algorithm for k-FMP. Our simulation result shows that the proposed algorithm outperforms Callahan et al.'s algorithm in terms of maximizing degree centrality. While our algorithm incurs higher running time (factor of k), given that the applications of the problem is expected to allow sufficient amount of time for thorough computation and k is expected to be much smaller than the size of input graph in reality, our algorithm has a better merit in practice.

• 한국어류학회지
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• 제22권4호
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• pp.225-229
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• 2010

납자루아과 담수어류인 각시붕어 Rhodeus uyekii와 묵납자루 Acheilognathus signifer의 속간 잡종으로 의심되는 개체를 북한강 지류인 조종천에서 채집하였다. 외부 형태 형질, 체색 반문, 혼인색 등을 비교한 결과 체색, 등지느러미, 뒷지느러미, 꼬리지느러미의 반문과 색깔, 체표의 반점과 종대 등이 두 종간의 중간형질을 보여 주고 있었다. 본 개체가 두 속간의 분류 형질인 수염은 없고 유공 측선 비늘수가 많은 점 등은 두 종간 자연 잡종으로 사료되었다. 두 종간 인공 교잡종의 생산은 자연 잡종의 출현 가능성을 시사하였다.

• 비파괴검사학회지
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• 제35권4호
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• pp.258-267
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• 2015

Eddy current testing is widely used for inspecting steam generator tubing in nuclear power plants (NPPs). The inspection technique for steam generator tubing in NPPs should be qualified in accordance with examination guidelines. When the components of a qualified system such as eddy current tester, probe, and data analysis program, are changed, the equivalency of the modified system to the originally qualified system must be verified. The eddy current tester is the most important part of an eddy current testing system because it excites and transmits alternating currents to the probe, receives coil impedance of the probe and generates signals for anomalies. The Korea Hydro & Nuclear Power Co., Ltd. (KHNP) developed an eddy current testing system with an eddy current tester and data acquisition-analysis program for inspecting the steam generator tubing in NPPs; this system can be used for an array probe and as a bobbin and rotating probes. The equivalency assessment for the currently developed system was carried out, and we describe the results in this paper.

• 한국지역지리학회지
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• 제14권5호
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• pp.453-465
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• 2008

본 연구는 국토정중앙의 개념 정립과 지리적 위치자원으로서의 가치를 파악하며, 그 활용 방안을 모색해 보는 것이다. 국토정중앙은 중앙경선과 중앙위선이 교차하는 지점이다. 이러한 국토정중앙이라는 지리적 위치자원은 지리교육의 위치교육 자료, 대척점 기준, 측지측량 기준점, 장소마케팅 요소 등으로 활용이 가능하다. 본 연구는 향후 국토 전역에 산재해 있지만, 숨겨져 있는 수많은 지리자원을 개발하는 이른바 지리상의 발견의 한 모델이 될 수 있을 것으로 생각된다.

• 정보관리연구
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• 제40권3호
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• pp.23-40
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• 2009

본 연구는 개정된 새 도서관법에 의한 지역대표도서관의 역할 규명을 위한 것으로, 특정 지역을 선정하여 그 지역대표도서관이 해당 지역 공공도서관 발전 도모를 위해 필요한 역할을 중심으로 진행되었다. 연구에서는 지역대표도서관의 본질적 기능과 해당 지역의 현장 사서들의 인식 및 환경적 요인을 바탕으로 하여 지원적 역할과 협력적 역할을 찾고자 하였다. 그 결과 협력적 역할로는 5개 지역의 특성화된 지역거점도서관의 활용으로, 지원적 역할로는 전북지역 지식정보원의 구축에 의한 교육 및 문화행사의 지원 등을 도모하도록 한다.

• The Journal of Asian Finance, Economics and Business
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• 제9권9호
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• pp.317-325
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• 2022

The simple regression model (SRM) is used in this study to look at potential economic growth-influencing factors. The sample's period runs from 2005 to 2019. The data was gathered from various ministries and government agencies such as the Central Bank of Afghanistan's Statistical Bulletin, the World Bank, the United Nations (UN), World Bank open data, NASA, Ministry of Finance (MoF), Ministry of Economy (MoE), and Central Bank of Afghanistan's Statistical Bulletin (CBA), as well as the internet and news. There is an urgent need to ensure that taxes are collected in the most efficient manner possible because one of the enormous management gaps in Afghanistan over the last two decades has been tax evasion. According to the results of this study, tax evasion has a negative and significant impact on Afghanistan's economic growth. We can affirm that the subject of this article is among the most significant topics recently discussed in my country. If the right solutions are implemented, It can significantly contribute to quickening the cycle of the developing Afghan economy and turning it from an unstable to a sustainable one.

• Journal of Ecology and Environment
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• 제46권1호
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• pp.8-17
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• 2022

Background: Parthenium hysterophorus L. (Asteraceae; hereafter Parthenium) is an invasive alien species of global significance because of its' negative ecological and socioeconomic impacts. This species is spreading rapidly from lowland Tarai to Middle Mountain regions in Nepal. In the present study, we analyzed the impacts of Parthenium on plant community composition including their soil seedbank in subtropical grasslands located in central Nepal. Data was collected in a 10 m long transects passing through areas of high (> 90% cover), medium (40%-60%) and low (< 10%) levels of Parthenium cover using a plot of 1 m². Altogether, we sampled 90 plots in 30 transects. Seedling emergence method was used to estimate soil seedbank density in the soil samples (0-10 cm depth) collected from the plots with high Parthenium cover. Results: There was no significant difference in the plant species richness at different levels of Parthenium invasion whereas there was a significant change in the species composition of above ground flora due to Parthenium invasion. There was also a significant difference in species composition between soil seedbank and aboveground flora in the highly invaded plots. Parthenium was the most dominant in soil seedbank, contributing 65% to the total soil seedbank. Conclusions: Our study suggests that Parthenium has considerable negative impact on the native grassland flora, and the dominance of Parthenium in the soil seedbank means there is a challenge for its management. It also suggests the need of monitoring the soil seedbank dynamics while managing Parthenium weed.

• Journal of Information Science Theory and Practice
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• 제12권2호
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• pp.64-78
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• 2024

Sentiment analysis is one of the promising approaches for developing a point of interest (POI) recommendation system. It uses natural language processing techniques that deploy expert insights from user-generated content such as reviews and feedback. By applying sentiment polarities (positive, negative, or neutral) associated with each POI, the recommendation system can suggest the most suitable POIs for specific users. The proposed study combines two models for POI recommendation. The first model uses bidirectional long short-term memory (BiLSTM) to predict sentiments and is trained on an election dataset. It is observed that the proposed model outperforms existing models in terms of accuracy (99.52%), precision (99.53%), recall (99.51%), and F1-score (99.52%). Then, this model is used on the Foursquare dataset to predict the class labels. Following this, user and POI embeddings are generated. The next model recommends the top POIs and corresponding coordinates to the user using the LSTM model. Filtered user interest and locations are used to recommend POIs from the Foursquare dataset. The results of our proposed model for the POI recommendation system using sentiment analysis are compared to several state-of-the-art approaches and are found quite affirmative regarding recall (48.5%) and precision (85%). The proposed system can be used for trip advice, group recommendations, and interesting place recommendations to specific users.

• 농촌지도와개발
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• 제4권2호
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• pp.399-406
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• 1997

Extension service in Korea has radical changes in accordance with local autonomy acts, 1994, and reformed rural development acts, 1995. According to these acts, the role of the central government is to arrange local extension service carried out by local extension office, to present basic plans on technical knowledge diffusion or farmers training to local government, and so on. Local extension office is a part of local government, and extension service is commited to the local government.