• Journal of Korea Multimedia Society
• /
• v.5 no.6
• /
• pp.730-744
• /
• 2002

A Web-Based Information System(WBIS), a typical structure of recently information systems, should be dynamically restructured in order to satisfy user's need and make a profit. Thus, we should analyze and modelize the navigational structure of WBIS and utilize it by modeling the navigational structure of behavior of user through log-file as system restructuring. In this paper, we propose the modeling method for navigational structure and user behavior to restructure WBIS including shopping mall. Also, we suggest the structural model, state transition model, Petri net model and analysis method and analyze and implement modeling algorithm for user behavior to analyze log-file of it. Then, we propose some restructuring heuristic and apply the methods to the example of WBIS.

• Journal of Digital Contents Society
• /
• v.3 no.1
• /
• pp.23-35
• /
• 2002

Recently, digital contents systems have been constructed by means of a Web-based Information Systems(WBIS). However, developers supper from the Web Crisis since there is no systematic methodology for development and maintenance of the WBIS. To partially cope with the problem, we propose web-based business process and navigation modeling methods for efficient restructuring of a WBIS. A Business Process Net model is the business process model. Additionally, system structure model, state transition model, and user interaction model are the navigation models. These models might be useful for development and restructuring of a WBIS which includes digital contents.

• Proceedings of the Korea Multimedia Society Conference
• /
• 2002.05d
• /
• pp.977-982
• /
• 2002

최근의 정보시스템의 전형적인 형태인 웹기반 정보시스템(WBIS)은 계속적으로 재구성되어야만 사용자의 욕구를 만족시킬 수 있으며 수익을 창출할 수 있다. 이를 위해, 시스템의 항해구조를 모델링하고 분석하여 시스템의 재구성시에 활용해야 한다. 이에 따라, 본 논문에서는 쇼핑몰을 포함한 WBIS의 재구성(또는 튜닝)을 위한 항해구조의 모델링 및 분석 방법을 제시한다. 항해구조의 모델링을 위해 구조모델, 상태전이 모델 및 패트리넷 모델 및 분석을 통한 분석방법을 제시하였다. 끝으로, WBIS의 재구성 휴리스틱을 제시하였으며 제시한 방법들을 사례 WBIS에 적용하였다.

• Proceedings of the Korean Information Science Society Conference
• /
• 2003.10b
• /
• pp.397-399
• /
• 2003

각 관공서나 공공기관에서 발생되는 각종 공사현황정보와 기술정보를 시설물 전체 수명주기동안 제대로 활용하기 위해서는 시설공사관리 업무를 전자처리체계로 전환하는 것이 시급하며, 사업계획에서 준공까지 일련의 과정에서 발생하는 문서들의 보관이 비체계적이므로 이를 잘 보관하고 재 사용하기 위한 관리체계가 필요하다. 따라서 본 연구는 공공건설분야를 담당하고 있는 지방국토관리청을 대상으로 사업단위별로 업무를 7가지로 세분화하고. 그 중에서도 핵심부분인 공공건설사업에 대한 체계적이고 효과적인 관리체계를 유지할 수 있는 웹 기반의 공사현황 정보시스템을 제안한다.

• Asian Pacific Journal of Cancer Prevention
• /
• v.17 no.3
• /
• pp.1115-1118
• /
• 2016

Background: There is controversy about ablation efficacy of low or high doses of radioiodine-131 (RAI) in patients with differentiated thyroid cancers (DTC). The purpose of this prospective study was to determine efficacy of 30 mCi and 100 mCi of RAI to achieve successful ablation in patients with low to intermediate risk DTC. Materials and Methods: This prospective cross sectional study was conducted from April 2013 to November 2015. Inclusion criteria were patients of either gender, 18 years or older, having low to intermediate risk papillary and follicular thyroid cancers with T1-3, N0/N1/Nx but no evidence of distant metastasis. Thirty-nine patients were administered 30 mCi of RAI while 61 patients were given 100 mCi. Informed consent was acquired from all patients and counseling was done by nuclear physicians regarding benefits and possible side effects of RAI. After an average of 6 months (range 6-16 months; 2-3 weeks after thyroxin withdrawal), these patients were followed up for stimulated TSH, thyroglobulin (sTg) and thyroglobulin antibodies, ultrasound neck (U/S) and a diagnostic whole body iodine scan (WBIS) for ablation outcome. Successful ablation was concluded with stimulated Tg< 2ng/ml with negative antibodies, negative U/S and a negative diagnostic WBIS (triple negative criteria). ROC curve analysis was used to find diagnostic strength of baseline sTg to predict successful ablation. Results: Successful ablation based upon triple negative criteria was 56% in the low dose and 57% in the high dose group (non-significant difference). Based on a single criterion (follow-up sTg<2 ng/ml), values were 82% and 77% (again non-significant). The ROC curve revealed that a baseline sTg level ${\leq}7.4ng/ml$ had the highest diagnostic strength to predict successful ablation in all patients. Conclusions: We conclude that 30 mCi of RAI has similar ablation success to 100 mCi dose in patients with low to intermediate risk DTC. A baseline $sTg{\leq}7.4ng/ml$ is a strong predictor of successful ablation in all patients. Low dose RAI is safer, more cost effective and more convenient for patients and healthcare providers.

• Proceedings of the Korean Information Science Society Conference
• /
• 2003.10c
• /
• pp.187-189
• /
• 2003

CPXe(The Common Picture eXchange environment) 서비스는 13A(International Imaging Industry Association)에서 제정한 디지털 이미지 교환 환경에 대한 표준으로써, 디지털 이미징 서비스를 이용하는 사용자들이 이미지 데이터를 보다 쉽고 편리하게 다양한 디지털 이미지 관련 웹 서비스(Web Services)를 이용할 수 있도록 지원하고 있다. 현재 CPXe 서비스는 CPXe UDDI 디렉토리 서비스의 정보를 사용자의 요구에 맞도록 필터링하여 HTML 정보로 변환한 후, 사용자가 인식하기 쉬운 방법으로 제공하는 Locator 서비스, 이미지 인화에 관한 Fulfillment 서비스, 웹 서비스와 사용자간 보다 편리한 인터페이스를 제공하는 WBIS(Web Browser Interaction Service) 등에 대한 API 스펙을 제공하고 있다. 본 논문에서는 사용자가 BPEL4WS(Business Process Execution Language for Web Services) 언어 를 사용하여, CPXe 표준을 따르는 온톨로지(Ontology)간 다양한 웹 서비스를 컴포넌트 형태로 구성(Composition)하고 궁극적으로 자신이 원하는 하나의 독특한 서비스를 구현할 수 있는 웹 서비스간 반자동(Semi­automatic) 구성 서비스 원형 (Prototype) 모델을 소개 할 것이다.

• The Journal of Korean Association of Computer Education
• /
• v.7 no.5
• /
• pp.9-21
• /
• 2004

In spite of the strong request that Internet, a new IT technique, should be extensively used in classroom settings, WBI is not still wide spread. One possible reason is that most WBIs developed so far are not qualitatively different from the traditional classroom ones and various design models for WBI are unknown. Developing a WBI program according to Goal-based Scenarios (GBS), a constructivistic instructional design model, this study offers a useful case for the design and development of WBI to educators and implementers. The program developed embodied seven important components of the GBS model. The development process also included needs assessment, task analysis, and learner and environment analysis, which are the basic components of the domain of instructional design. The GBS development case in this article will provide concrete guidelines to educational practitioners who have an intention to create a new type of WBI in schools as well as in corporate.

• Asian Pacific Journal of Cancer Prevention
• /
• v.15 no.15
• /
• pp.6443-6447
• /
• 2014

Background: To determine the predictive value of the baseline stimulated thyroglobulin (STg) level for ablation outcome in patients undergoing adjuvant remnant radioiodine ablation (RRA) for differentiated thyroid carcinoma (DTC). Materials and Methods: This retrospective study accrued 64 patients (23 male and 41 female; mean age of $40{\pm}14$ years) who had total thyroidectomy followed by RRA for DTC from January 2012 till April 2014. Patients with positive anti-Tg antibodies and distant metastasis on post-ablative whole body iodine scans (TWBIS) were excluded. Baseline STg was used to predict successful ablation (follow-up STg <2 ng/ml, negative diagnostic WBIS and negative ultrasound neck) at 7-12 months follow-up. Results: Overall, successful ablation was noted in 37 (58%) patients while ablation failed in 27 (42%). Using the ROC curve, a cut-off level of baseline STg level of ${\leq}14.5ng/ml$ was found to be most sensitive and specific for predicting successful ablation. Successful ablation was thus noted in 25/28 (89%) of patients with baseline STg ${\leq}14.5ng/ml$ and 12/36 (33%) patients with baseline STg >14.5 ng/ml ((p value <0.05). Age >40 years, female gender, PTS >2 cm, papillary histopathology, positive cervical nodes and positive TWBIS were significant predictors of ablation failure. Conclusions: We conclude that in patients with total thyroidectomy followed by I-131 ablation for DTC, the baseline STg level is a good predictor of successful ablation based on a stringent triple negative criteria (i.e. follow-up STg < 2 ng/ml, a negative DWBIS and a negative US neck).

• The Journal of Society for e-Business Studies
• /
• v.8 no.2
• /
• pp.77-98
• /
• 2003

A web-based information system, that is a dominant type of information systems, suffers from the "web crisis" in development and maintenance of the system. To cope with the problem, a technology of software clustering to web-based application, which is one of web engineering, is strongly needed. In this paper, we propose a Form Clustering Algorithm along with an application example, which are used for internal-system reengineering to web-based information system. A Form Clustering Algorithm focuses on Page-model which is the feature of the web among the various web-based information system's structural model. Specially, we applying distance matrix to navigation model of graph form for easily analyzing, and web log analysis for identifying core function object that have a highly loading. Also, we create web software structure that can be used to maximize reusability and assign hardware effectively through 2-phase clustering step. Form Clustering Algorithm might be used at web-based information system development and maintenance for reusable web component development and hardware assignment, respectively.

• Asian Pacific Journal of Cancer Prevention
• /
• v.17 no.1
• /
• pp.125-129
• /
• 2016

Background: Patients with differentiated thyroid cancers (DTC) who receive radioactive iodine-131 (RAI) are released from isolation when their dose rate is below the regulatory requirements. The purpose of this study was establish predicting factors for early release from the isolation facility after RAI administration in patients with DTC. Materials and Methods: This was a prospective study which included 96 (58 females and 38 males) patients with DTC who had received RAI from April 2013 till August 2015. The study was duly approved by the ethical committee of the institute. Patients who had complete information of primary tumor size (PTS), serum TSH, stimulated thyroglobulin level [sTg] with antibodies (IU/ml) at the time of RAI treatment were included. All had a normal serum creatinine level. To attain lower effective half-life good hydration and administration of soft laxative were ensured. Dose rate was measured (immediately, 24 h and 36 h) at 1 meter distance from anterior mid trunk and a dose rate <$50{\mu}Sv/h$ was considered as the releasing criterion. At 24 h 50 patients were released while the remaining 46 patients were released at 36 h. A post-ablative whole body scan (PA-WBIS) was performed 5-8 days after RAI ablation in all patients. Results: Patients released after 24 h were significantly younger, had smaller lesions with higher proportion of papillary cancer, lower sTg, lower sTg/TSH ratio and had received a lower dose of RAI as comapred to those who were discharged after 36 h. Serum TSH and gender were not found to have any significant correlation between two cohorts. ROC and multivariate analysis have shown age ${\leq}37years$, PTS ${\leq}3.8cm$, $RAI{\leq}150mCi$, $sTg{\leq}145ng/ml$ and $sTg/TSH{\leq}1.085$ as strong indepedent predictors for early release. Conclusions: We conclude that younger age (${\leq}37years$), smaller tumor size (${\leq}3.8cm$), lower RAI dose (${\leq}150mCi$), lower sTg (${\leq}145ng/ml$) and a lower sTg/TSH ratio (${\leq}1.085$) are significant independent predictors for release at 24 h after RAI treatment in DTC patients. Effective utilization of these factors could help the treating physicians to use limited number of internment facilities with higher throughput, lower cost and lower psychological stress to patients.