• 한국인터넷방송통신학회논문지
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• 제22권6호
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• pp.107-112
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• 2022

드론과 같은 임베디드 시스템에서 데이터를 서버로 전송해 실시간 분석을 진행함에 있어진행하는 데 초분광 영상 전체를 저장, 전송, 분석하는 데 전력 소모와 시간이 많이 소요되어 어려움이 있다. 그래서 초분광 영상 데이터는 차원 축소 또는 압축 전처리를 통해 서버로 전송하게 된다. 분석에 필요한 밴드만 보내기 위해서는 피처 선택 기법을 사용하는데 이러한 알고리즘은 대게 효율은 높더라도 영상 크기에 따라 처리 시간이 매우 소요가 크다. 본 논문에서는 밴드선택 알고리즘의 시간적인 단점을 개선하여한 기댓값 기반의 알고리즘을 제안한다. 실험 결과 8GB 데이터의 40000*682 해상도 이미지 기준 평균 소요 시간인 24시간을 60~180초 내외로 감소시키고, 150개 밴드 중에 45개를 활용하여 7.6GB 램 사용을 2.3GB로 크게 감소시켰다. 시간은 크게 줄였음에도 픽셀 분류 성능은 기존과 유사하게 98% 이상의 분석 결과를 도출하였다.

• International Journal of Computer Science & Network Security
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• 제23권12호
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• pp.101-106
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• 2023

Chronic illnesses are among the most common serious problems affecting human health. Early diagnosis of chronic diseases can assist to avoid or mitigate their consequences, potentially decreasing mortality rates. Using machine learning algorithms to identify risk factors is an exciting strategy. The issue with existing feature selection approaches is that each method provides a distinct set of properties that affect model correctness, and present methods cannot perform well on huge multidimensional datasets. We would like to introduce a novel model that contains a feature selection approach that selects optimal characteristics from big multidimensional data sets to provide reliable predictions of chronic illnesses without sacrificing data uniqueness.[1] To ensure the success of our proposed model, we employed balanced classes by employing hybrid balanced class sampling methods on the original dataset, as well as methods for data pre-processing and data transformation, to provide credible data for the training model. We ran and assessed our model on datasets with binary and multivalued classifications. We have used multiple datasets (Parkinson, arrythmia, breast cancer, kidney, diabetes). Suitable features are selected by using the Hybrid feature model consists of Lassocv, decision tree, random forest, gradient boosting,Adaboost, stochastic gradient descent and done voting of attributes which are common output from these methods.Accuracy of original dataset before applying framework is recorded and evaluated against reduced data set of attributes accuracy. The results are shown separately to provide comparisons. Based on the result analysis, we can conclude that our proposed model produced the highest accuracy on multi valued class datasets than on binary class attributes.[1]

• 한국지리정보학회지
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• 제10권2호
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• pp.152-163
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• 2007

현재 시행되고 있는 사전환경성검토는 부분 항목별 수치분석이 이루어지고 있어 종합적인 사전환경성검토가 어려운 실정이다. 또한, 수치자료의 활용이 미흡하여 환경성검토 분석결과의 객관성이 저하되고 있고, 평가비용과 시간도 많이 소요되고 있다. 본 연구에서는 8개 사전환경성 검토요소에 대한 지리정보체계의 공간분석기능을 도입하였으며, 개별 요소들의 평가결과를 통한 종합적인 검토를 수행할 수 있도록 계층분석기법을 활용한 사전환경성검토 GIS 의사결정시스템을 구축하였다. 본 연구에서 개발한 사전환경성 검토 GIS 의사결정 시스템과 기 구축된 GIS 데이터의 활용을 통해 환경성 검토에 객관성의 충족 및 시간 비용 절감이 가능하여 사업초기에 도로노선선정 시 사전환경성 검토에 활용 가능할 것이다. 또한, 본 연구에서 개발된 시스템을 통하여 수치적이고 시각적인 자료를 활용한 평가로 주민의 합의를 보다 용이하게 이끌어 낼 수 있고, 사업초기에 비용과 시간을 절감하면서 도로건설에 따른 환경성을 검토할 수 있을 것으로 기대된다.

• 대한지구과학교육학회지
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• 제16권2호
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• pp.276-290
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• 2023

이 연구의 목적은 초등 예비교사들이 생각하는 성공적인 과학수업의 특징과 구체적인 요소에 대해 분석하는 것이다. 연구를 위해 초등예비교사 61명(여 47명, 남 14명)을 연구참여자로 모집하였다. 연구에 사용한 자료는 그룹별 및 개인별 수업실연 중 작성한 상호평가지이다. 자료의 양은 총 150페이지의 방대한 질적 자료였으며 이 자료를 질적 분석을 통해 귀납적 범주화하여 연구 결과를 도출하였다. 연구 결과를 요약하면 다음과 같다. 첫째, 성공적인 과학수업을 구성하는 요소는 7개 범주(14개의 하위 범주, 33개의 하위 요소)로 분석되었다. 구체적인 성공적인 과학수업을 구성하는 요소는 과학교과 내용, 수업운영, 교수학습방법 선정 및 수업내용 조직, 교수학습자료, 학생이해, 교수상황 이해, 수업관련 노력으로 분석되었다. 둘째, 예비교사들이 인식하는 성공적인 과학수업을 구성하는 요소의 구체적인 내용을 수집하여 예비교사들의 실제적인 수업의 모습을 기술할 수 있었다. 이상의 연구 결과에서 보듯이, 예비교사가 인식하는 성공적인 과학수업의 특징과 구체적인 요소를 파악할 수 있었으며, 이를 바탕으로 예비교사가 효과적인 과학수업운영을 위한 지원을 개발할 수 있을 것이며 이에 대한 지속적인 분석이 이루어져야 할 것으로 생각된다.

• 한국물환경학회지
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• 제26권2호
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• pp.289-296
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• 2010

The purpose of this study is to evaluate various pre-treatment methods and proprieties of water quality for wastewater reuse using reverse osmosis (RO) processes. Secondary effluents were sampled from wastewater treatment plants and lab scale pre-treatments and RO filtration test were conducted systematically. Specifically, different types of pre-treatments, such as coagulation, microfiltration and ultrafiltration, were employed to evaluate the removal efficiency of particle and organic matters which may affect the membrane fouling rate. RO process was later added to eliminate trace amounts of remaining organic matters and salt from the raw water for wastewater reclamation. The permeate through the RO process satisfied water quality regulations for industrial water uses. The experimental results showed that the initial fouling tendency differed not only by the feed water properties but also by the membrane characteristics. Membrane fouling was greater for the membranes with large surface roughness, regardless of the hydrophobicity and zeta potentials. Thus both careful consideration of pre-treatment options and proper selection of RO membrane are of paramount importance for an efficient operation of wastewater treatment.

• 패션비즈니스
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• 제17권6호
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• pp.44-59
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• 2013

The modern people do express their personalities by appearance and actively use the appearance as the social tools, and the attractive appearance largely does influence the human relationship. As the appearance's importance is being magnified, the attractive appearance and favourable impression is an important standard for job performance and social position, and used as the way to reach the social goal. This study does investigate the design's kind and character of the beard which belongs to the male exclusive property and compare the differences of the impression's formation according to the beard design. The empirical results confirmed that the male beard design formated the various impressions according to the designs and their mutual relationship existed. Therefore, the beard is a symbol of maleness and an expression for the social position and personal character, whereas it possesses the very important meaning as the influencing factor on the impression's change. First, the pre stimuli were finished through the pre survey for composition of questionnaire in order to evaluate the impression after selection of experimental models and beard types for measuring instruments. Second, sixty three university students were surveyed by pre stimuli and questionnaire as pre experiment, and afterwards the measuring instruments and experimental design were revised. Third, the stimuli completed (nine beard designs) were intentionally well distributed as questionnaire by sex and ages in Seoul metropolitan and her environment. and the factorial analysis and the coefficient of Cronbach's ${\alpha}$ for reliability test were completed for questionnaire's validity using SPSS/PC+ Window Ver. 12.0.

• 한국환경농학회지
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• 제39권3호
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• pp.263-272
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• 2020

BACKGROUND: This paper describes the successful discrimination of GM crops from the respective wild type (WT) controls using spectroscopy and chemometric analysis. Despite the many benefits that GM crops, their development has raised concerns, particularly about their potential negative effects on food production and the environment. From this point of view, the introduction of GM crops into the market requires the development of rapid and accurate identification technologies to ensure consumer safety. METHODS AND RESULTS: The development of a GM crop discrimination model using spectroscopy involved the pre-processing of the collected spectral information, the selection of a discriminant model, and the verification of errors. Examples of GM versus WT discrimination using spectroscopy are available for soybeans, tomatoes, corn, sugarcane, soybean oil, canola oil, rice, and wheat. Here, we found that not only discrimination but also cultivar grouping was possible. CONCLUSION: Since for the determination of GM crop there is no pre-defined pre-processing method or calibration model, it is extremely important to select the appropriate ones to increase the accuracy in a case-by-case basis.

• 한국과학교육학회지
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• 제35권2호
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• pp.231-245
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• 2015

과학 교육에서도 플립 러닝은 혁신적인 교수 방법으로 사용될 수 있다. 본 연구에서는 초등 예비교사들이 플립 러닝을 위해 제작한 동영상을 분석하고, 효과적인 시각화 구성 전략을 탐색하였다. 초등 예비교사들은 지구 영역의 과학수업을 위해 구체적 사례 선택하기 전략을 사용하여 거시적인 자연현상에 대한 정보를 제공하는 데 중점을 두고 있었다. 구체적 사례를 전달하기 위해 마커와 공간변환 요소를 효과적으로 사용하였으나, 학생들의 경험과 관련지으려는 노력이 부족하였다. 또한 학생들의 심상을 강화하기 위해 간단하게 도식화하거나 극단적인 사례를 제시하는 경우는 매우 드물었다. 마지막으로 효과적인 시각화 자료를 구성하기 위해서는 다중 표상의 구체적 사례를 제시하고, 친숙한 사례나 비유 모델을 통하여 학생들의 경험과 긴밀히 연결지어 주어야 한다. 또 심상을 강화하기 위해 간단하게 도식화하기, 극단적 사례를 제시하여 새로운 상황 추리할 수 있는 기회를 부여해야 한다.

• 한국환경교육학회지:환경교육
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• 제20권1호
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• pp.90-105
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• 2007

The purpose of this study is to find the influence of environmental issue analysis instruction on the environmental decision making ability for grade 5 elementary school students. The study was done through pre and post testing control group structure. The object of this study is grade 5 of I elementary school students which were divided into 35 student test group and 54 student control group. Through studying references, the selection standard of appropriate environment issue and the environmental issue analysis instructing objective. Conducted the environment issue instructing based on the selected environment issue and instructing objective. The classes were held in total of 6 sessions in the chapters related to class objective and class content within the curriculum. The pre and post testing was done using environment decision making ability test sheet which was reconstructed by myself and the results were analyzed by t-test. As a result of comparing pre and post testing the students in test group showed significant results in the processes of problem recognition, evaluation of alternatives, behave planing (p<.001). As a result of comparing the differences of environment decision making ability of pre and post test of test group and control group, it showed significant results in the process of evaluation of alternatives(p<.00l). The environment issue analysis class has positive influence on the environment decision making abilities of the students but since the outcome of environment decision making ability is lower, there is a need for long term environment education plan and further studies to find whether the environment issues within the textbook is appropriate in the elementary student level, useful school aspect and the influence of environment issue analysis class on the change of values for individuals.

• The Journal of Korean Physical Therapy
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• 제33권3호
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• pp.123-130
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• 2021

Purpose: Despite the existence of Snoezelen method, there is no case of researching the effects on game addiction. Therefore, this study aims to investigate the effects of Snoezelen therapy on stress, depression, anxiety and quality of life of college students who overuse computer games or mobile phone games. Methods: Eight students who responded to spend more than 30 hours of computer or mobile phone games in the selection questionnaire were recruited (The total respondents were 224 students). Students were randomly assigned to either the study group (4 students) or the control group (4 students). Stress (Korean version of Perceived Stress Scale, K-PSS), depression (Korean Screening Tool for Depression Disorders, K-DEP), Anxiety (Korean Beck Anxiety Inventory, K-BAI) and quality of life (Short Form Health Survey version 2 [SF-36]) were assessed three times (before intervention [pre], post-3 weeks [post 1], post-6 weeks [post 2]). Results: First, the study group (-4.75±3.86) and control group (1.00±2.71) showed significant difference (p<0.05) in the analysis of score changes between pre-test and test at 6 weeks (post 2) for K-DEP. Next, pre-test and test at 3 weeks of intervention (post 1) for K-BAI showed significant difference (p<0.05) in the study group (-2.50±1.91) and control group (2.25±2.99). In addition, pre-test and test at 6 weeks (post 2) showed significant difference (p<0.05) for the study group (-3.00±1.51) and control group (4.75±6.24). Conclusion: The study confirmed the possibility of Snoezelen therapy as a therapy method to induce effective responses in stress, depression, anxiety, and quality of life of college students with game addiction.