• 한국정보과학회논문지:소프트웨어및응용
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• 제31권11호
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• pp.1455-1473
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• 2004

본 연구는 객체 재사용과 재공학을 위해 레거시 시스템의 인터페이스 정보로부터 의미 있는 정보를 추출하고 새로운 시스템에 통합될 수 있도록 하기 위한 기존 레거시 시스템의 인터페이스에 기반 한 객체추출 기법을 제안한다. 본 논문에서 제안하는 객체추출 기법은 인터페이스 사용 사례 분석 단계, 인터페이스 객체 분할 단계, 객체구조 모델링 단계, 객체 모델 통합 단계 등 4단계로 구성되어 있다. 인터페이스 사용 사례 분석 단계는 인터페이스 구조 그리고 레거시 시스템과 사용자간의 상호작용 등의 정보를 획득하는 단계이다. 인터페이스 객체분할 단계는 인터페이스 정보를 의미 있는 필드들로 구분하는 단계이며, 객체구조 모델링 단계는 인터페이스 객체들 간의 구조적 관계와 협력 관계를 파악하여 모델링하는 단계이다. 마지막으로 객체 모델 통합 단계는 객체 단위의 단위 모델들을 통합하여 추상화된 정보를 포함한 상위 수준의 통합 모델을 유도하는 단계다. 객체추출 기법에 의해 생성된 객체 통합 모델은 역공학 기술자들의 레거시 시스템 이해와 레거시 시스템의 정보를 새로운 시스템에 적용하는데 있어 좀 더 용이한 효율성을 제공한다.

• 한국지리정보학회지
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• 제6권2호
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• pp.33-45
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• 2003

이 연구는 객체지향 지리정보시스템을 이용하여 지리-객체와 지리-필드를 연결하는 지리-객체필드 방법을 규정하고, 수계-객체필드를 이용하여 새만금호 수량과 배수갑문수위를 조작하는 새만금수자원관리시스템의 홍수 시뮬레이션을 구현하고자 한다. 그리고 새만금 수계 수자원에 발생하는 자연현상과 인공현상을 조합하여 하나의 전체 수계-객체필드로 구성되는 객체지향 클래스 계층구조를 설계함으로써 홍수통제 알고리즘 기법을 제안하고자 한다. 동시에 UML을 이용하여 전체적인 지리-객체필드와 단계적인 부분 지리-객체필드의 클래스계층구조를 가시화하고자 하며, 각 클래스의 속성과 메소드는 ZEUS/COM과 Win32 API을 이용한 Visual Basic 6.0을 사용함으로써 각각 호환성과 재사용성 기능을 확보하고자 한다. 이 논문은 새만금수자원관리시스템을 구현함으로써 효율적인 물관리를 하는데 기여할 수 있을 것이다.

• 한국정밀공학회지
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• 제30권3호
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• pp.300-307
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• 2013

This paper describes the development of a cylindrical-object grasping force measuring system applied haptic technology to measure the grasping force of strokes patients' fingers and other patients' paralyzed fingers. Because the cylindrical-object and the force measuring device of the developed cylindrical-object grasping force measuring system are connected with the electrical wires, patients and their families have difficulty not only measuring the patients' grasping force using the system but also knowing their rehabilitation extent when using it. In this paper, the cylindrical-object grasping force measuring system applied haptic technology was developed, and the cylindrical-object grasping force measuring device sends data to the rehabilitation evaluating system applied haptic technology by wireless communication. The grasping force measurement characteristic test using the system was carried out, and it was confirmed that the rehabilitation extent of the patients' paralyzed fingers and normal people fingers can be evaluated.

• 전기학회논문지
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• 제59권8호
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• pp.1436-1440
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• 2010

In this paper, we proposed that stereo camera system using fuzzy control for moving object tracking. We extract some features of the moving object from overall image. This informations send to the PC and the PC calculate the coordinate of the object in the image frame. To make the object set in the middle of the image, the step motor should be controlled accurately and rapidly with the location information received by the PC. Then we design a fuzzy logic system for controlling stereo camera system. To verify the better performance of the proposed algorithm, we exemplified by experimental results.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2008년도 하계종합학술대회
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• pp.947-948
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• 2008

Recently, many efforts have been made for research and application of object tracking system. However, introduced object tracking algorithms have limitations to adopt a realtime object tracking system with multi camera. In this paper, we present a novel background generation and target object recognition algorithm for realtime object tracking system with multi camera and implemented it.

• 한국군사과학기술학회지
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• 제13권5호
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• pp.734-738
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• 2010

Object Generator is a software to provide simulation object data(aircraft, ship, submarine, missile, torpedo) for sumulators in LBTS(Land Based Test System). but there is a burden to the system, because Object generator needs to send many object's data, display objects in a tactical screen, show object's information in a list in 1 second. This paper suggests a parallel software structure taking a few factors(deadlock, dependency) into consideration. At last, the paper shows the performance of the parallel structure's software compared with the former structure's software.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 2003년도 ISIS 2003
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• pp.24-27
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• 2003

This paper discusses practical strategies for transition from a pinching to a power grasping, where a multi-fingered hand mounted on a robotic arm envelops a cylindrical object on a table. When the manipulation system grasps a cylindrical object like a pen on a desk, a complete enveloping is not impossible in the initial configuration. The system firstly pinches the object only with two or three fingers and then grasp it with fingers and a palm after regrasping. In this pinching-grasping transition maneuver, human unconsciously selects proper strategy according to some conditions including object dimensions and initial pinching positions. In this paper we therefore develop six possible strategies for this pinching-grasping transition and then investigate their performances for some objects with various dimensions and various grasping positions, using numerical simulations. Based on their results, effective strategies are implemented by using a hand-arm system.

• 컴퓨터교육학회논문지
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• 제10권2호
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• pp.101-113
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• 2007

본 논문에서는 객체지향 시공간 데이터베이스 시스템의 데이터 모델링과 질의어를 객체지향 기법을 사용하여 소개한다. 시공간 객체와 시공간 연산자를 다루기 위해 다음과 같은 두 단계 객체지향 데이터 모델을 제안 한다: 시공간 객체 모델과 시공간 내부 기술 모델 또한 객체지향 시공간 질의어인 STOQL을 제안한다. STOQL은 공간 객체의 다양한 출력과 시공간 및 비 공간 객체의 검색을 수행할 수 있는 통합 기능을 제공해준다.

• 디지털산업정보학회논문지
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• 제7권3호
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• pp.37-42
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• 2011

Nowadays software developers are moving from conventional software process technologies to the object-oriented paradigm. To develope the object-oriented softwares efficiently, various software metrics have been suggested. Coupling refers to the degree of independence between components of the system. It has long been well known that good software practice calls for minimizing coupling interaction. Many researches have been studied coupling metrics of the object- oriented systems. We review Chidamber and Kemerer's work & Li's work. In this paper, we study the coupling of the overall structures of object-oriented systems by analyzing the class diagram of UML. We propose four coupling metrics for object-oriented softwares. First, we use an established coupling metric for object- oriented systems as a basic coupling metric. Then we modify the basic coupling metric by including indirect coupling between classes, We also suggest two relative coupling metrics to measure coupling between subsystems. We investigate the theoretical soundness of the proposed metrics by the axioms of Briand et al. Finally, we apply the presented metrics to a practical case study. This coupling metric will be helpful to the software developers for their designing tasks by evaluating the coupling metric of the structures of object-oriented system and redesigning tasks of the system.

• 대한임베디드공학회논문지
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• 제19권2호
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• pp.91-99
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• 2024

Collision avoidance system is important to improve the robustness and functional safety of autonomous vehicles. This paper proposes an object-level distance estimation method to develop a collision avoidance system, and it is applied to golfcarts utilized in country club environments. To improve the detection accuracy, we continually trained an object detection model based on pseudo labels generated by a pre-trained detector. Moreover, we propose object-aware depth estimation (OADE) method which trains a depth model focusing on object regions. In the OADE algorithm, we generated dense depth information for object regions by utilizing detection results and sparse LiDAR points, and it is referred to as object-aware LiDAR projection (OALP). By using the OALP maps, a depth estimation model was trained by backpropagating more gradients of the loss on object regions. Experiments were conducted on our custom dataset, which was collected for the travel distance of 22 km on 54 holes in three country clubs under various weather conditions. The precision and recall rate were respectively improved from 70.5% and 49.1% to 95.3% and 92.1% after the continual learning with pseudo labels. Moreover, the OADE algorithm reduces the absolute relative error from 4.76% to 4.27% for estimating distances to obstacles.