• ETRI Journal
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• 제43권2호
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• pp.272-287
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• 2021

This article presents a multi-dimensional spatial pattern analysis of crime events in San Francisco. Our analysis includes the impact of spatial resolution on hotspot identification, temporal effects in crime spatial patterns, and relationships between various crime categories. In this work, crime prediction is viewed as a classification problem. When predictions for a particular category are made, a binary classification-based model is framed, and when all categories are considered for analysis, a multiclass model is formulated. The proposed crime-prediction model (HotBlock) utilizes spatiotemporal analysis for predicting crime in a fixed spatial region over a period of time. It is robust under variation of model parameters. HotBlock's results are compared with baseline real-world crime datasets. It is found that the proposed model outperforms the standard DeepCrime model in most cases.

• 응용통계연구
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• 제15권1호
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• pp.33-43
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• 2002

범주형 데이터의 결측치 추정을 위하여 최빈 범주법, 로지스틱 회귀분석, 연관규칙과 같은 다양한 방법이 연구되어 왔다. 본 연구에서는 이러한 방법의 추정 값을 결합하는 신경망 융합과 투표융합 방법을 제안하고 이의 성능을 시뮬레이션을 이용하여 비교하였다. 실험에 사용된 데이터의 특성을 나타내는 인자로는 (1) 입출력 변수간의 연결함수, (2) 데이터의 크기, (3) 노이즈의 크기 (4) 결측치의 비율, (5) 결측발생 함수를 사용하였다. 분석결과는 다음과 같다. 데이터의 크기가 작고 결측 발생 비율이 높으면 최빈 범주법, 연관규칙, 신경망 융합의 성능이 높게 나타났으며 데이터의 크기가 작고 결측발생 확률이 결측이 안된 나머지 변수에 높은 의존관계가 있으면 로지스틱 회귀분석, 신경망 융합의 성능이 높게 나타났다. 데이터의 크기가 크고, 결측치의 비율이 낮으면서, 노이즈가 크고 결측발생 확률이 결측이 안된 나머지 변수에 높은 의존관계가 있으면 신경망 융합의 성능이 높게 나타났다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2018년도 추계학술대회
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• pp.178-179
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• 2018

최근 자율주행 및 음성인식 등 인공지능 분야에서 기계학습을 이용한 방법이 활발히 연구되고 있다. 디지털 영상에서 특정 사물이나 영역을 인식하기 위해 고전적인 경계검출 및 패턴인식 등의 고전적인 영상처리 방법으로는 많은 한계를 가지고 있으나 deep-learning 등 기계학습 방법을 이용하면 사람의 인지수준에 근접한 결과를 얻을 수 있다. 하지만 기본적으로 deep-learning 등 기계학습은 방대한 양의 학습데이터가 확보되어야 한다. 따라서 환경 분석을 위한 항공사진처럼 데이터의 양이 매우 적은 경우 영역 구분을 위해 기계학습을 적용하기 어렵다. 본 연구에서는 입력영상의 dataset 크기가 적고 입력 영상의 형태가 training dataset의 category에 포함되지 않는 경우 사용할 수 있는 transfer-learning 기법을 적용하며 이를 이용하여 영상 내에서 특정 영역 검출을 수행한다.

• 한국컴퓨터산업학회논문지
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• 제2권7호
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• pp.945-952
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• 2001

인터넷 사용 인구의 증가로 전자상거래는 새로운 상거래 형태로 빠르게 발전하고 있으며, 대다수 인터넷 쇼핑몰들은 사용자에게 더 많은 정보와 편리한 사용자 인터페이스를 제공함으로써 보다 많은 고객을 확보하려고 노력하고 있다. 편리한 인터페이스 중의 하나는 상품을 추천해주는 서비스이며, 이를 위해서는 쇼핑몰에서의 구매정보, 행동 그리고 장바구니 등 사용자로부터 특정 행동패턴을 추출하고 분석하는 방법이 필요하다. 이러한 방법 중에서 상품간의 연관성 추출을 위하여 주로 연관규칙과 순차패턴이 이용되고 있는데, 대부분의 온라인 전자상거래에서는 사용자의 정보 또는 구매이력을 가지고 카테고리를 중심으로 수행하고 있다. 그러나 이는 단일한 구매패턴에 의한 연관성만을 나타낼 뿐이며, 상품 각각에 대한 연관성을 찾아보기 힘들다. 또한 단일 구매패턴은 계산 비용이 작기는 하지만 사용자의 구매패턴을 정확하게 반영하기 어렵다. 따라서 본 논문에서는 이러한 문제를 해결하기 위하여 카테고리 독립적이고 단일 항목간의 구조화를 통하여 항목간의 연계성을 갖는, 다중 구매패턴을 고려하는 마이닝 방법을 제안한다.

• 한국운동역학회지
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• 제13권1호
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• pp.73-94
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• 2003

The purpose of this investigation was to analyze A kinematic analysis of the Kuzushi-arm motion when performing Morote-Seoinage in judo who was 5 females university representative judokas of light weight category in judo, and filmed on video cameras(60field/s). The data of this study digitizied by KWON3D 2.1 program computed the average and standard deviation calculated individual 5 trials with Programing Lab view 6i. From the data analysis & discussion, the following conclusions were drawn : 1) distance variable of attacking hand arm in kuzushi motion Left right(X direction) displacement variable was all of A, B, C pattern with moving left to right and leaning. Strip of displacement variable was ordo. to C(55.6cm), A(53.3cm), B(43.9cm) pattern, C pattern largely leaned to left Front Rear(Y direction) displacement variable was different A($131.3cm{\pm}3.1cm$), B($128.7{\pm}4.0cm$) and C(111.0cm) on ready position, 3 pattern leaned to rear direction. Strip of displacement was order to B(43.4cm), A(41.1cm) and C pattern(28.3cm). Up down(Z direction) displacement variable was all of A, B, C pattern leaned to up in the Kuzushi-phase and leaned to down in the Kake-phase. Strip of displacement was order to A(83.9cm), B(80.4cm), C pattern(71.9cm). 2) Shoulder joint angle variable Flexion and extension Ready position' angle was A($138.3{\pm}4.9^{\circ}$), B($142.9{\pm}3.7^{\circ}$) and C($164.5^{\circ}$) pattern, strip of flexion extension was order to C($80.9^{\circ}$), A($79.9^{\circ}$) and B($39.0^{\circ}$) pattern, greatly C pattern had largely angle change. Adduction and abduction : B and C pattern's angle change were adduction and abduction in the Kuzushi-phase after adduction in the Kake phase, A pattern's angle change was abduction in the Kuzushi-phase after adduction in the Kake phase. internal and external rotation : 3 pattern were internal rotation in the Tsukuri phase and external rotation in the Kake phase. After B and C pattern were external rotation and A pattern was internal rotation. 3) Elbow joint angle variable Flexion and extension 3 pattern's ready position angle were A($142.0{\pm}4.4^{\circ}$), B($123.5{\pm}5.5^{\circ}$) and C($105.5^{\circ}$) and flexion. Strip of flexion extension were order to A($57.9^{\circ}$), C($34.6^{\circ}$) and B($25.2^{\circ}$) pattern.

• Journal of Forest and Environmental Science
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• 제28권2호
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• pp.75-83
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• 2012

An explanatory survey was conducted to assess preference and consumption pattern of horticultural species, their sources, location-wise planting preferences and diversity of these species in the rural homestead forest of the offshore island of Bangladesh. Assessment was done through multistage random sampling. Based on homestead size respondents were categorized into small (<0.05 ha), medium (0.05-0.25 ha) and large (>0.25 ha) and twenty from each category were selected randomly for the study. The study revealed that most of the farmer (75.5%) preferred to plant fruit tree species for future plantation followed by timber species (62.2%). But fruit-bearing plants were being gradually replaced by some exotic timber species such as Swietenia mahagoni, Acacia auriculiformis, Tectona grandis, Eucalyptus spp., etc. Diversity and abundance of fruit species was found higher in almost all homestead. A total of 41 horticultural species were identified and seven horticultural species among them were recognized as the most preferred ones in the study area. Consumption pattern was chiefly to meet the nutritional demand and to gain a quick monetary benefit. Average annual income from horticultural species was 7,183.33 Taka (US$102).

• 대한한의학원전학회지
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• 제23권6호
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• pp.51-72
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• 2010

The Jeokseokji-uyeoryang-tang(赤石脂禹餘糧湯) text of "Sang-hanron(傷寒論)" is adopted in the chapter of So-eumin Interior Disease Pattern in "Dong-uisusebowon(東醫壽世保元)". In this study, I have attempted to analyze the Jeokseokji-uyeoryang-tang(赤石脂禹餘糧湯) texts for the purpose of understanding the So-eumin Interior Disease Pattern thoroughly. In specific, Ijema(李濟馬) stated that the Simhabigyeong(心下痞硬) symptom of the Jeokseokji-uyeoryang-tang(赤石脂禹餘糧湯) text is identical to the symptoms of other conditions that apply Sasimtang(瀉心湯). Which means that the disease pattern of Jeokseokji-uyeoryang-tang(赤石脂禹餘糧湯) is a intensified condition of that of Sasimtang(瀉心湯). Next, unlike Jang Jung-gyeong(張仲景) and other annotators of "Sang-hanron(傷寒論)", Ijema(李濟馬) did not perceive Ijungtang(理中湯) to manage the central cho(中焦). Instead, he perceived it appropriate for Tae-eumbyeong(太陰病_disease of Tae-eum), bringing the meaning of Jeokseokji-uyeoryang-tang(赤石脂禹餘糧湯) into the category of Sameumbyeong(三陰病_disease of the three eum). With this, he made it possible to compare and analyze the texts based on the Sameum/Samyang(三陰三陽) theory. Lastly, Ijema(李濟馬) perceived the symptoms of Jeokseokji-uyeoryang-tang(赤石脂禹餘糧湯) as So-eum pattern, and categorized it into Tae-eum pattern. Following this, a comprehensive review of Ijema(李濟馬)'s unique understanding of the Jeokseokji-uyeoryang-tang(赤石脂禹餘糧湯) text and its implications were discussed. This part is not included in this article, however, and will be exclusively dealt with in a subsequent article.

• 한국콘텐츠학회논문지
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• 제2권1호
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• pp.68-76
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• 2002

클러스터링은 부품 분류의 대표적인 방법인데, 클래스나 모듈의 응집도와 결합도를 이용한 기존의 클러스터링 방법은 클래스간의 관계에 중점을 둔 디자인 패턴을 기존의 클러스터링 방법을 이용하는 것은 효과적일 수 있다. 본 논문에서는 디자인 패턴을 분류하기 위해 패턴 구조의 특성을 가지고 분류하였다. 그리고 클러스터링에 의한 분류는 패싯 분류에 의한 방법보다 높은 정확도를 보여주었다. 따라서 자동화된 분류방법인 클러스터링 알고리즘을 사용하여 디자인 패턴을 분류하는 것이 효과적이라 할 수 있다. 디자인 패턴의 분류는 검색 시 유사한 패턴들이 같은 카테고리에 저장이 되므로 유사 패턴을 비교하여 사용할 수 있으며, 패턴 클러스터링에 의해 분류되고, 패턴의 링크정보를 이용하여 저장하므로 저장소를 효율적으로 관리할 수 있다.

• 한국실내디자인학회:학술대회논문집
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• 한국실내디자인학회 2007년도 춘계학술대회 논문집
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• pp.176-180
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• 2007

The stage space in theatre for the performance of a play requires two aspects of the physical space for a play and the image as the background or the theme of a play. This research focuses on the scene design that creates the background or the theme of a play and communicates it to the audience. The scene design is composed of various design elements of space and objects as the properties of a play. Design elements and the objects are the design languages in various form; plane, three-dimensional, multi-dimensional form. These design language have the significant meaning as a sign like human language. The scene design is completed with rhetorical expression for communication in theatre. This research defines the category of meaning that design elements of scene design can create and the rhetorical expression of the scene design language. King Lear directed by Robert G. Anderson was analyzed with the category of design elements as a sign and the pattern of the rhetorical expression. The scene design for a play is completed effectively by the rhetorical expression of design elements as the design language for communication with the audience in theatre.

• 한국실내디자인학회논문집
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• 제16권3호
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• pp.21-29
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• 2007

The communication in a play has a dual structure, which is composed of the communications within a play and in a theatre space. This research focuses on the scene design that creates the background or the theme of a play and communicates theme of a play to the audience. A scene design of a theatre has meta-linguistic aspects, which is the image or mood as the theme of a play. The scene design is composed of various design elements of space and objects as the properties of a play. Design elements and the objects are the design languages in various form; plane, three-dimensional, multi-dimensional form. These design languages have the significant meanings as signs like human language. The play works chooses the rhetorical expression to arouse the audience's sympathy. The scene design is completed with rhetorical expression for communication in theatre too. This research defines the category of meanings that design elements of scene design can create and the rhetorical expression of the scene design language. King Lear directed by Robert G. Anderson was analyzed with the category of design elements as a sign and the pattern of the rhetorical expression. The scene design for a play is completed effectively by the rhetorical expression of design elements as the design language for the communication with the audience in theatre.