• 한국산업정보학회논문지
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• 제17권2호
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• pp.45-55
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• 2012

본 논문에서는 제조공정의 공정정보관리시스템을 구축하는데 있어서 기존 솔루션을 도입하여 수정하는 방법이 아니라 자체적으로 시스템을 설계하고 개발하는 방법을 제안하고 그 구축 효과를 살펴본다. 기존 시스템의 문제점을 해결하기 위한 데이터베이스 구축 방법을 소개하고, 사용자의 특성에 맞는 맞춤형 정보를 제공할 수 있는 방법으로 공정의 기준정보를 세분화하고, 세분화한 기준정보를 각 단계별로 연관성을 가지도록 코드화한다. 코드화된 기준정보를 이용하여 활용도가 가장 높은 리포트 기능을 사용자 편의에 초점을 맞추어 제공하는 방법을 제안한다. 마지막으로는 구현을 통하여 제안 시스템의 유용한 예를 몇 가지 제시한다.

• ETRI Journal
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• 제34권5호
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• pp.734-742
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• 2012

A novel interaction method for mobile phones using their built-in cameras is presented. By estimating the path connecting the center points of frames captured by the camera phone, objects of interest can be easily extracted and recognized. To estimate the movement of the mobile phone, corners and corresponding Speeded-Up Robust Features descriptors are used to calculate the spatial transformation parameters between the previous and current frames. These parameters are then used to recalculate the locations of the center points in the previous frame into the current frame. The experiment results obtained from real image sequences show that the proposed system is efficient, flexible, and able to provide accurate and stable results.

• 한국정보과학회논문지:시스템및이론
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• 제33권12호
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• pp.859-866
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• 2006

그리드 포탈 서비스는 기존의 어플리케이션 기반 그리드 서비스가 갖는 시간적 공간적 제약을 극복하여 보다 유연한 연구 환경을 제공한다. 그러나 사용자 인터페이스와 같은 사용자 요구 사항은 개발 기간 동안 불분명하기도 하고 자주 변하기도 한다. 그러므로 그리드 서비스를 위한 사용자 인터페이스를 만들고 유지 관리하는 비용을 줄일 수 있는 방안이 필요하다. 본 논문에서는 유저 인터페이스 개발이 보다 쉽고 코드의 재사용률을 증가시킬 수 있는 객체 기반의 컨트롤 모델을 제안한다. 이 모델에서는 프레젠테이션 페이지의 구조를 보다 명확히 기술할 수 있고 액션들을 구현하는 것이 보다 쉽고 간단하다.

• Journal of Information Technology Applications and Management
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• 제9권2호
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• pp.17-32
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• 2002

Even though the distance education via web has a great advantage to overcome time and space, its problem is that the management of trainees is not efficient compared with classroom and group education. This problem is a great obstacle to the objects and achievement standards of distance education, giving controversial arguments to the advocators of distance education. Distance educators need to monitor the trainees'participation and responses continuously and offer appropriate feedback to the trainees. However, the existing distance education system only focuses on teaching and learning activities, and as a result, the efficient management function of distance education is not available. Accordingly, the study attempts to find out the appropriate managing elements of distance teacher training in order to effectively achieve the goals of teacher training and the efficient management of distance education. Also, it proposes distance teacher training management system that offers appropriate feedback to trainees, applying the derived elements of distance teacher training to the training processes. To verify the efficiency of the system, hypotheses on related items of distance teacher education and learning types are suggested, and the achievement degree of learning and its relations are investigated through questionnaire of learning types. In addition, a system using UML which is the standard of object-oriented modeling language is devised, so. that mutual management, language independence and convenient development environment as well as reusability can be offered, and so the design standardization and efficient system realization could be achieved, while flexible change of system according to education process and computing environment is possible.

• 융합보안논문지
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• 제5권1호
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• pp.1-9
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• 2005

XML은 웹 응용을 위한 데이터의 처리와 전송을 위해 가장 일반적인 툴이 되고 있다. 모든 온라인 비즈니스 솔루션에서 정책들은 광범위하게 사용되고 있으며, 접근 요청에 대한 'yes/no'와 같은 이분법적인 결정은 충분하지 않다고 인식되고 있다. 이 논문에서는 provision과 obligation을 지닌 로직 형식으로 표현하는 정책규칙을 보안정책 프로그래머들이 융통성있게 명시할 수 있고 구현할 수 있도록 XML로 변환하여 표현하는 기법을 개발하였다. 사용자 정보, 객체 정보, 액션들을 XML로 표현하기 위한 일반적인 형식을 정의하였으며, 이 세 요소를 기본 요소로 하여 정책들을 명시하기 위한 XML DTD를 개발하였다. 향후에는 권한부여 정책에 기반한 접근 제어뿐만 아니라 데이터의 성격에 따라 각 필드에 있는 데이터를 변환하고 부인방지 기법을 도입하는 등 다양한 보안 기능을 지원하기 위해 이들을 XML 정책 규칙으로 명시하는 것에 대해 연구하고자 한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권9호
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• pp.3151-3168
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• 2021

Internet of Things (IoT) connects several objects with embedded sensors and they are capable of exchanging information between devices to create a smart environment. IoT smart devices have limited resources, such as batteries, computing power, and bandwidth, but comprehensive sensing causes severe energy restrictions, lowering data quality. The main objective of the proposal is to build a hybrid protocol which provides high data quality and reduced energy consumption in IoT sensor network. The hybrid protocol gives a flexible and complete solution for sensor selection problem. It selects a subset of active sensor nodes in the network which will increase the data quality and optimize the energy consumption. Since the unused sensor nodes switch off during the sensing phase, the energy consumption is greatly reduced. The hybrid protocol uses Dijkstra's algorithm for determining the shortest path for sensing data and Ant colony inspired variable path selection algorithm for selecting active nodes in the network. The missing data due to inactive sensor nodes is reconstructed using enhanced belief propagation algorithm. The proposed hybrid method is evaluated using real sensor data and the demonstrated results show significant improvement in energy consumption, data utility and data reconstruction rate compared to other existing methods.

• 한국전문물리치료학회지
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• 제28권2호
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• pp.117-122
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• 2021

Background: Flat-back posture refers to a posture in which the pelvis is tilted backward, the lumbar spine is bent, the upper thoracic spine is increasingly bent, and the lower thoracic spine is straight. Given that most of the day is spent sitting, we need to develop exercise programs and devices that are suitable for people who spend less time exercising than sitting. Objects: This study investigated the effects of resistance footrest exercise on spine posture angles in visual display terminal (VDT) workers with flat back. Methods: We measured the upper lumbar angle (ULA) and lower lumbar angle (LLA) using a flexible ruler for the ULA and LLA. Then, after 1 week of resistance footrest exercise designed to strengthen the lumbar spine musculature, we measured these angles again. We measured each angle three times and then compared measurements from before and after exercise. Results: There were no significant differences in the ULA following the strengthening exercise, but significant differences were observed in LLA. Conclusion: The resistance footrest exercise strengthened the muscles affecting the pelvic and lumbar lordotic angles, and increases in the LLA were changed. This suggests that the role of the lower lumbar spine in the lumbar lordotic curve is greater than that of the upper lumbar spine. In addition, considering the contemporary tendency to lead fairly sedentary lives, these results indicate that exercising while seated can be effective.

• 한국군사과학기술학회지
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• 제21권6호
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• pp.842-849
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• 2018

This research suggests the development of simulator for a Simulation Test of a moving object's path generation and following. There are many kinds of moving objects in weapon systems, such as vehicles, missiles, robots and so on. So need tests of moving simulations during development process of weapon systems. To simulate a moving object, need an flexible path. So this report suggests a $B\acute{e}zier$ curve algorithm for generation of smooth curve path. And when new developments of weapon systems are started, many kinds of simulators are created. But, these simulators are not reused in other project because there are different kinds of development environment. So need to allow users to add specific features, And this report suggests using Dynamic Link Library(DLL).

• 산업경영시스템학회지
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• 제44권4호
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• pp.145-153
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• 2021

Automated Guided Vehicle (AGV) is commonly used in manufacturing plant, warehouse, distribution center, and terminal. AGV is self-driven vehicle used to transport material between workstations in the shop floor without the help of an operator, and AGV includes a material transfer system located on the top and driving system at the bottom to move the vehicle as desired. For navigation, AGV mostly uses lane paths, signal paths or signal beacons. Various predominant sensors are also used in the AGV. However, in the conventional AGV, there is a problem of not turning or damaging nearby objects or AGV in a narrow space. In this paper, a new driving system is proposed to move the vehicle in a narrow space. In the proposed driving system, two sets of the combined steering-drive unit are adopted to solve the above problem. A prototype of AGV with the new driving system is developed for the comparative analysis with the conventional AGV. In addition, the experimental result shows the improved performance of the new driving system in the maximum speed, braking distance and positioning precision tests.

• Journal of Dental Anesthesia and Pain Medicine
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• 제22권3호
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• pp.161-174
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• 2022

Foreign body aspiration can produce a medical emergency. Obstruction of the airways can be life-threatening, and complications may develop in less-severe cases if it is left untreated. Although it is more prevalent in children by approximately three times, adults can still experience it, and it is more frequently related to healthcare in adults. Objects used in dental treatment are usually placed in the oral cavity and can be ingested or inhaled by accident. Dental treatment has been identified as an important cause of the misplacement of foreign bodies in the airway. However, few reports have been published on dentistry-related foreign body aspiration. This paper discusses the disease course, management, and clinical outcomes of foreign body aspiration, especially those associated with dentistry. The patient must be examined for respiratory distress. If the patient is unstable, urgent airway management and the maneuvers for removal should be performed. Radiographs and computed tomography can help identify and locate the object. The treatment of choice is often bronchoscopy, and both flexible and rigid endoscopes can be used depending on the situation. Preventive measures need to be implemented to avoid inhalation accidents given the potential consequences. Though the incidence is rare, healthcare levels need to be enhanced to avert morbidity and mortality. Radiological evaluation and bronchoscopy are vital for management.