• 한국IT서비스학회지
• /
• 제8권4호
• /
• pp.87-101
• /
• 2009

The current information system audit merely inspects a web based information system by focusing on checking items that are extracted from structured and information engineering model and object-oriented component model. As a result, the checking item of web contents and design is inadequate. This paper aims to extract audit framework in order to strengthen the audit of web contents and design during the development of the web based information system and to suggest checking items based on audit framework. For this, the web development process and web site evaluation model were studied, compared, and analyzed with the current information system development audit. From a result of the survey, it was found that the adequacy of the suggested audit framework and audit checking items is above the average value. It is believed that the suggested audit framework is helpful for the audit of web based information system.

• 한국CDE학회논문집
• /
• 제1권2호
• /
• pp.97-106
• /
• 1996

Existing CAD systems do not provide advanced functions for automatic checking design and drafting errors in mechanical drawings. If the knowledge of checking in mechanical ddrsfting can be implemented into computers, CAD systems could automatically check for design and drafting errors. This paper describes a method for systematic checking of dimension errors. such as deficiency and/or redundancy of dimension input-errors in dimension figures and symbols, etc. The logic for finding dimensional errors is written by using a proccedural language. A geometric model and a topological-graph model are used in this method. Checking for deficiency and redundancy of dimensions is based upon graph Theory.

• Journal of Computing Science and Engineering
• /
• 제9권1호
• /
• pp.9-19
• /
• 2015

The most important challenge in the region-based abstraction method as an approach to compute the state space of time Petri Nets (TPNs) for model checking is that the method results in a huge number of regions, causing a state explosion problem. Thus, region-based abstraction methods are not appropriate for use in developing practical tools. To address this limitation, this paper applies a modification to the basic region abstraction method to be used specially for computing the state space of TPN models, so that the number of regions becomes smaller than that of the situations in which the current methods are applied. The proposed approach is based on the special features of TPN that helps us to construct suitable and small region graphs that preserve the time properties of TPN. To achieve this, we use TPN-TCTL as a timed extension of CTL for specifying a subset of properties in TPN models. Then, for model checking TPN-TCTL properties on TPN models, CTL model checking is used on TPN models by translating TPN-TCTL to the equivalent CTL. Finally, we compare our proposed method with the current region-based abstraction methods proposed for TPN models in terms of the size of the resulting region graph.

• 한국정보과학회:학술대회논문집
• /
• 한국정보과학회 2004년도 봄 학술발표논문집 Vol.31 No.1 (B)
• /
• pp.346-348
• /
• 2004

시스템의 안정성을 검증하는 Model Checking(모델 검증)은 여러 가지 분야에서 기본적으로 중요하게 사용되어왔다. 하지만 Model Checking의 특성상 Computing Power가 많이 필요한 점과 최근 소프트웨어의 대형화, Ubiquitous 환경에서의 잦은 변화가 필요한 점 등으로 Model Checking 을 그대로 적용하기 어렵다. 따라서 이 논문은 점증적인 변화에 따른 필요한 부분만 검증하는 점증적 모델 검증을 소개한다.

• 한국정보통신학회논문지
• /
• 제25권9호
• /
• pp.1275-1278
• /
• 2021

Nowadays, fake news from newspapers and social media is a serious issue in news credibility. Some of machine learning methods (such as LSTM, logistic regression, and Transformer) has been applied for fact checking. In this paper, we present Transformer-based fact checking model which improves computational efficiency. Locality Sensitive Hashing (LSH) is employed to efficiently compute attention value so that it can reduce the computation time. With LSH, model can group semantically similar words, and compute attention value within the group. The performance of proposed model is 75% for accuracy, 42.9% and 75% for Fl micro score and F1 macro score, respectively.

• 한국안전학회지
• /
• 제34권6호
• /
• pp.29-37
• /
• 2019

Since construction sites are exposed to outdoor environments, working conditions are significantly dangerous. Thus, wearing of the personal protective equipments such as safety helmet is very important for worker safety. However, construction workers are often wearing-off the helmet as inconvenient and uncomportable. As a result, a small mistake may lead to serious accident. For this, checking of wearing safety helmet is important task to safety managers in field. However, due to the limited time and manpower, the checking can not be executed for every individual worker spread over a large construction site. Therefore, if an automatic checking system is provided, field safety management should be performed more effectively and efficiently. In this study, applicability of deep learning based computer vision technology is investigated for automatic checking of wearing safety helmet in construction sites. Faster R-CNN deep learning algorithm for object detection and classification is employed to develop the automatic checking model. Digital camera images captured in real construction site are used to validate the proposed model. Based on the results, it is concluded that the proposed model may effectively be used for automatic checking of wearing safety helmet in construction site.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2021년도 춘계학술대회
• /
• pp.19-21
• /
• 2021

본 논문에서는 어텐션 메커니즘에 기반하여 정보 판단에 대한 근거를 제공하는, 이른바 설명 가능한 팩트체크 모델을 제안할 것이다. 최근 미디어의 발달에 따라 각종 뉴스가 쏟아지고 있는 바, 이와 더불어 뉴스에 대한 진위 여부 판단, 즉 팩트체크가 주목받고 있는 상황이다. 하지만 현재 팩트체크는 언론인이나 시민 단체 일원들의 검색 능력에 의존하고 있어서, 이를 자동적으로 하는 모델에 대한 연구가 진행되고 있다. 이에 본 논문에서 설명 가능한 자동 팩트체크 모델을 제안하고자 한다.

• 한국산학기술학회논문지
• /
• 제7권3호
• /
• pp.420-430
• /
• 2006

본 연구는 건축사시험에서 건축법규 체크를 자동화하는 방법을 제안하다. 건축법규 체크 자동화를 가능하게 하기위하여 필요한 빌딩데이터모델을 제안하고, 그와 함께 시험답안을 주어진 건축법규와 자동으로 비교하여 충족여부를 판단할 수 있는 평가모듈을 개발한다. 본 연구의 특징은 체계적인 평가가 가능하게 하였으며, 기존의 연구와 달리 필요한 경우에 적용 건축법규의 수를 시스템의 수정 없이 증가시킬 수 있는 방법을 제시하였다는 점이다.

• Nuclear Engineering and Technology
• /
• 제51권2호
• /
• pp.463-478
• /
• 2019

The most important non-functional requirements for dependability of any Embedded Real-Time Safety Systems are safety, availability and reliability requirements. System architecture plays the primary role in achieving these requirements. Compliance with these non-functional requirements should be ensured early in the development cycle with appropriate considerations during architectural design. In this paper, we present an application of system architecture modeling for quantitative assessment of system dependability. We use probabilistic model checker (PRISM), for dependability analysis of the DTMC model derived from system architecture model. In general, the model checking techniques do not scale well for analyzing large systems, because of prohibitively large state space. It limits the use of model checking techniques in analyzing the systems of practical interest. We propose abstraction based compositional analysis methodology to circumvent this limitation. The effectiveness of the proposed methodology has been demonstrated using the case study involving the dependability analysis of safety system of a large Pressurized Water Reactor (PWR).

• Computers and Concrete
• /
• 제22권2호
• /
• pp.133-142
• /
• 2018

The deterioration of existing bridges has become a major problem around the world. In the paper, a new model and an associated stress checking method are proposed for concrete box girders strengthened by external prestressing. The new model called the spatial grid model can analyze all the spatial behaviors clearly by transforming the box girder into discrete orthogonal grids which are equivalent to plate elements. Then the three-layer stresses are employed as the stress checking indices to evaluate the stress state of the plate elements. The initial stress check before strengthening reveals the cracked and potential cracking areas for existing bridges, making the strengthening design more targeted and scientific; the subsequent stress check after strengthening evaluates the strengthening effect and ensures safety. A deficient bridge is selected as the practical example, verifying the accuracy and applicability of the proposed model and stress checking method. The results show that principal stresses in the middle layer of plate elements reflect the main effects of external prestressing and thus are the key stress checking indices for strengthening. Moreover, principal stresses check should be conducted in all parts of the strengthened structure not only in the webs. As for the local effects of external prestressing especially in the areas near anchorage and deviator, normal stresses check in the outer and inner layers dominates and local strengthening measures should be taken if necessary.