• Journal of the Korean Society of Systems Engineering
• /
• v.11 no.1
• /
• pp.81-93
• /
• 2015

Steam Reforming H2 Generation (SRH2G) System is a chemical process to produce hydrogen through steam reforming of hydrocarbon. Largely speaking, there are two types of materials for the SRH2G: 1) Oil and coal, and 2)Natural Gas such as shale gas. From the perspective of cost, quality (purity), and environmental burden (pollution), the latter is much more desirable than the former. For this reason, research on SRH2G using natural gas is actively carried out, and implemented and operated in the various industry. In this paper, we develop a natural gas based SRH2G system via systems engineering approach. Specifically, we first derived stakeholder requirements, followed by systems requirements and finally system architecture via a tailored SE process for plant (called Plant Systems Engineering (PSE) process) based on ISO/IEC 15288. The developed method was applied to iron and steel plant as a case study. Through the case study, by the SE approach, we were convinced that a successful system satisfying stakeholders' requirements within the given constraints can be developed, verified and validated.

• The Journal of Korean Association of Computer Education
• /
• v.11 no.2
• /
• pp.107-117
• /
• 2008

The agent system that can adjust the workload dynamically through thc periodical monitoring of the VoD system comprises the agency part interfacing the VoD system and the intelligence part reasoning or learning the facts required for the adjustment of workload. This paper proposes a learning method that can apply to the intelligence part of the agent system. The proposed method can adjust the workload more efficiently by the rule's reasoning process and case-based learning process. An experiment of implementing a simulator was conducted to see whether or not application of the proposed method to VoD systems is efficient. As a result of the experiment, it was found that the throughput and the average waiting time of the VoD server were relatively improved when the proposed method was applied compared to existing means.

• The KIPS Transactions:PartD
• /
• v.9D no.6
• /
• pp.1009-1016
• /
• 2002

We design and implement a new case-based recommender system using implicit rating information for a digital content site. Our system consists of the User Profile Generation module, the Similarity Evaluation and Recommendation module, and the Personalized Mailing module. In the User Profile Generation Module, we define intra-attribute and inter-attribute weight deriver from own's past interests of a user stored in the access logs to extract individual preferences for a content. A new similarity function is presented in the Similarity Evaluation and Recommendation Module to estimate similarities between new items set and the user profile. The Personalized Mailing Module sends individual recommended mails that are transformed into platform-independent XML document format to users. To verify the efficiency of our system, we have performed experimental comparisons between the proposed model and the collaborative filtering technique by mean absolute error (MAE) and receiver operating characteristic (ROC) values. The results show that the proposed model is more efficient than the traditional collaborative filtering technique.

• Journal of Computing Science and Engineering
• /
• v.10 no.3
• /
• pp.85-94
• /
• 2016

We propose a model-based method for information alignment using educational standards as a case study. Discrepancies and inconsistencies in educational standards across different states/cities hinder the retrieval and sharing of educational resources. Unlike existing educational standards alignment systems that only give binary judgments (either "aligned" or "not-aligned"), our proposed system classifies each pair of educational standard statements in one of seven levels of alignments: Strongly Fully-aligned, Weakly Fully-aligned, Partially-$aligned^{***}$, Partially-$aligned^{**}$, Partially-$aligned^*$, Poorly-aligned, and Not-aligned. Such a 7-level categorization extends the notion of binary alignment and provides a finer-grained system for comparing educational standards that can broaden categories of resource discovery and retrieval. This study continues our previous use of mathematics education as a domain, because of its generally unambiguous concepts. We adopt a materialization pattern (MP) model developed in our earlier work to represent each standard statement as a verb-phrase graph and a noun-phrase graph; we align a pair of statements using graph matching based on Bloom's Taxonomy, WordNet, and taxonomy of mathematics concepts. Our experiments on data sets of mathematics educational standards show that our proposed system can provide alignment results with a high degree of agreement with domain expert's judgments.

• 대한상한금궤의학회지
• /
• v.7 no.1
• /
• pp.29-43
• /
• 2015

Objective : The purpose of this paper is to report the improvement of 3 patients with uterine fibroid treated by herb medication based on Shanghanlun disease pattern identification diagnostic system. Methods : According to 'Disease Pattern Identification Diagnostic System based on Shanghanlun Provisions', they were diagnosed with Taeyang-byung, Yangmyung-byung. They took different herb medications more than 8 weeks according to their diagnosis. The size of uterine fibroid was estimated by ultrasonography. Results : The size of uterine fibroid reduced from 3.94cm to 2.55cm on first patient, 5.20cm to 4.86cm on second patient, 12.63cm to 7.77cm on third patient. Conclusions : Herb medication not only reduced the size of uterine fibroid but also improved symptoms such as dysmenorrhea, vaginal bleeding, pelvic discomfort, fatigue. In addition, this is the first case report treating the uterine fibroid with herb medication of shanghanlun in Korea.

• 대한상한금궤의학회지
• /
• v.8 no.1
• /
• pp.87-97
• /
• 2016

Objective : This case report aims to demonstrate the effect of Herbal medicine on menopausal syndrome. Methods : A 54 years woman suffered from menopausal syndrome with hot flush, insomnia and dyspepsia. According to Diagnostic system based on Shanghanlun provisions, the patient was diagnosed with Taeyang-byung and treated by Sosiho-tang decoction at first. But the next time the patient visited, she was treated by Oryeong-san decoction. The result of administrations were evaluated by Kupperman's index(KI), Menopause rating scale(MRS). Results : After administration of Sosiho-tang decoction for 35 days, KI was decreased from 50 to 19, MRS was decreased from 9 to 4. But her chronic dyspepsia wasn't getting better. So the KMD prescribed Oryeong-san decoction. After administration of Oryeong-san decoction for 14 days, KI was decreased from 19 to 0, MRS was decreased from 4 to 1. And her chronic dyspepsia was functionally improved. Conclusions : The patient completely recovered from menopausal syndrome and dyspepsia as treated by Sosiho-tang decoction and Oryeong-san decoction according to Diagnostic system based on Shanghanlun provisions.

• 대한상한금궤의학회지
• /
• v.9 no.1
• /
• pp.115-123
• /
• 2017

Objective : The purpose of this paper is to report the improvement of patient with Chronic Fatigue Syndrome(CFS) treated by herb medication based on Shanghanlun disease pattern identification diagnostic system. Methods : According to 'Disease Pattern Identification Diagnostic System based on Shanghanlun Provisions', the patient was diagnosed with Eumyangyeokchahunobok-byung, number 393 provision, and took Jisilchija-tang herb medication for 75days. The changing symptom of chronic fatigue syndrome was estimated by QOL-CFS(Chalder Fatigue Scale) and VAS(Visual Analogue Scale). Results : The QOL-CFS changed 21 to 8 and VAS changed 10 to 1. Conclusions : It is existing theory that Eumyangyeokchahunobok-byung is caused by 'having too much sex relation'. But the author diagnosed Eumyangyeokchahunobok-byung as 'Symptoms worsen when awaken at night, and sleep at day caused by poor sleep pattern' according to the palaeography about shanghanlun, and got a good results.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.12 no.4
• /
• pp.677-684
• /
• 2008

We propose an grid-based research system that replays the experiment by storing and reusing the previous experiment result data in performing remote experiment from a distance. The proposed system was designed for the real-time hybrid test facility which is being built in Korea Construction Engineering Development(KOCED) Project. To provide users with various data, the experiment result data are maintained by the distributed streaming servers based on the publish/subscribe paradigm. Based on the data characteristics of our project, we compared analyzed the performance of the one-streaming-server case and the distributed-multiple-streaming-server case.

• KIPS Transactions on Software and Data Engineering
• /
• v.3 no.7
• /
• pp.255-262
• /
• 2014

Our previous research[1] suggested object extraction and modeling method based on Fillmore's case grammar. This approach had not considered of use case extraction and method. To solve this problem, we adopt Fillmore's semantic method as linguistic approach into requirement engineering, which refine fillmore's case grammar for extracting and modeling use cases from customer requirements. This Refined mechanism includes the definition of a structured procedure and the representation of visual notations for 'case' modeling. This paper also proposes the use case decision matrix to identify use case size from extracted use cases based on goal oriented requirement engineering(GoRE), which related with the complexity of use case, and also prioritizes the use cases with this matrix. It demonstrates our proposal with the bank ATM system.

• The Transactions of the Korean Institute of Electrical Engineers A
• /
• v.48 no.6
• /
• pp.747-752
• /
• 1999

In the fast sampling limit, the delta operator model tends to the analog system model. This fundamental property of the delta operator model unifies continuous and discrete time control system. In this paper, we study robust linear optimal model following servo system in the presence of disturbances and parameter perturbations. A technique to directly design the generalized differential operator based unified control system that convers both differential operator based continuous time and delta operator based discrete time case is presented. The quadratic criterion function for a linear system is used to design the robust unified servo control. The characteristics of the proposed servo system are analysed and simulated to verify the robustness.