• Journal of Information Science Theory and Practice
• /
• 제1권1호
• /
• pp.10-26
• /
• 2013

Domain transfer is a widely recognized problem for machine learning algorithms because models built upon one data domain generally do not perform well in another data domain. This is especially a challenge for tasks such as opinion classification, which often has to deal with insufficient quantities of labeled data. This study investigates the feasibility of self-training in dealing with the domain transfer problem in opinion classification via leveraging labeled data in non-target data domain(s) and unlabeled data in the target-domain. Specifically, self-training is evaluated for effectiveness in sparse data situations and feasibility for domain adaptation in opinion classification. Three types of Web content are tested: edited news articles, semi-structured movie reviews, and the informal and unstructured content of the blogosphere. Findings of this study suggest that, when there are limited labeled data, self-training is a promising approach for opinion classification, although the contributions vary across data domains. Significant improvement was demonstrated for the most challenging data domain-the blogosphere-when a domain transfer-based self-training strategy was implemented.

• 한국수학교육학회지시리즈D:수학교육연구
• /
• 제16권3호
• /
• pp.195-206
• /
• 2012

We adopt a spirit of Problem based learning to the class of Multivariable Calculus in a school of scientifically talented students and observed effects of our teaching-learning method in the Spring Semester of 2010. Twelve students who enrolled in this class participated in this research. We have proceeded with classroom experiment for the half of semester after midterm exam so that the students could compare our teaching-learning method with usual traditional one in the subject of multivariable calculus. Especially, we investigated changes in the learning attitude and cognitive development of the students toward definition and theorem of mathematics. Each group of 4 students worked on a sheet of our well-designed structured problems of several steps in each class and presented how they understood the way of constructing new definition and related theorems. Instructor's role in this research was to guide students' activities as questioner so that students could attain the clear meanings of definitions and theorems by themselves. We firstly analyzed students' process of mathematization of definition through observing their discussions and presentations as well as their achievements in the quizzes and final exams. Secondly, we analyzed students' class-diaries collected at the end of each class in addition to pre/post surveys.

• 인터넷정보학회논문지
• /
• 제9권3호
• /
• pp.69-77
• /
• 2008

구조화 조명을 사용한 거리측정에 동적계획법을 적용함으로써 거리 측정의 정확성이 대폭 향상된 방법을 제안하였다. 구조화 조명을 사용한 거리 측정방법은 거리정보가 조명에 해당하는 화소의 위치에 의해 계산될 수 있다는 점을 이용한 것이다. 그러나, 이 구조화 조명 빛이 물체의 표면에서 흡수되거나 반사됨으로서 흐리거나 잘 보이지 않는 경우가 많다. 이 문제를 해결하기 위해서 본 연구에서는 동적계획법을 사용하였다. 동적 계획법을 위한 셀간 비용(cost)값은 화소 밝기 값의 역수를 사용하였으며, 상단과 하단에 각각 시작선 혹은 목표선을 설정하였다. 이 알고리즘의 장점은 동적 계획 법의 최적화 능력을 사용하므로, 구조화 조명선의 약한 흔적이나 부분적으로 절단된 조명선 위치도 잘 찾아낼 수 있다. 이 알고리즘을 사용하여 다양한 3 차원 물체를 복원한 실험 결과를 제시하였다.

• Nuclear Engineering and Technology
• /
• 제35권4호
• /
• pp.318-335
• /
• 2003

Expert judgment is frequently employed in the search for the solution to various engineering and decision-making problems where relevant data is not sufficient or where there is little consensus as to the correct models to apply. When expert judgments are required to solve the underlying problem, our main concern is how to formally derive their technical expertise and their personal degree of familiarity about the related questions. Formal methods for gathering judgments from experts and assessing the effects of the judgments on the results of the analysis have been developed in a variety of ways. The most important interest of such methods is to establish the robustness of an expert's knowledge upon which the elicitation of judgments is made and an effective trace of the elicitation process as possible as one can. While the resultant expert judgments can remain to a large extent substantiated with formal elicitation methods, their applicability however is often limited due to restriction of available resources (e.g., time, budget, and number of qualified experts, etc) as well as a scope of the analysis. For this reason, many engineering and decision-making problems have not always performed with a formal/structured pattern, but rather relied on a pertinent transition of the formal process to the simplified approach. The purpose of this paper is (a) to address some insights into the balanced use of formally structured and simplified approaches for the explicit use of expert judgments under resource constraints and (b) to discuss related decision-theoretic issues.

• The Journal of Asian Finance, Economics and Business
• /
• 제5권3호
• /
• pp.95-102
• /
• 2018

The objective of this research is to explore the diverse challenges faced by the customer as well transport providers through the selected modes of transportation of the second most populous country in the world - India. Two separate well-structured questionnaires administered to garner the opinions on different challenges. A random sample of 100 equally selected from the customers of 3 modes of transportation along with 30 transport providers. The collected data was analyzed in Microsoft Excel and R Studio platforms using Percentile Rank Tool and R Programming Language for Chi-square test respectively. Traffic congestion coupled with parking is the major problem in case of roadways while Safety and cleanliness in railways are the first amongst the problems to reckon with. High fares and lack of trained employees are the biggest challenges faced by aviation industry. The research is concentrated only in the states of Andhra Pradesh and Telangana in India with most widely used three modes of transportation viz., Road, Rail and Airways. This research paper is first of its kind which has collected the opinions of both customers as well transport providers on the problems faced. This research proffers information about the challenges faced by the customers which there will be an enormous possibility to review their strategies and plans.

• 시스템엔지니어링학술지
• /
• 제10권1호
• /
• pp.33-41
• /
• 2014

New design concept of Reactor Coolant System (RCS) including a reactor assembly for the SMR is introduced in this work. An exploration of new type of reactor that is advanced from proposed SMRs is performed by using systems engineering approach. In this point of view project structured on three main phases; needs analysis (NA), concept exploration (CE), and concept definition (CD). Main objectives as an output of the CE stage are a small size, low cost, shortening the schedule, and enhancing safety. The SMRs usually have a small size requirement. In order to meet the size requirement and to achieve a productivity, in other words, easiness to manufacture, this paper suggests an integrated PWR design concept through researching predecessors. Although the integrated PWR concept provides many advantages, it has disadvantages that composite of maintenance and a low availability problem. Therefore, this paper comes up with a run-to-fail design concept based on modular design to address the maintenance problem and to maximize the availability of SMRs as well as to be compatible with the overall-SMRs including Barge Mounted(BM)type.

• Asia pacific journal of information systems
• /
• 제9권3호
• /
• pp.127-142
• /
• 1999

There have been strong arguments that the best organizational type for the information society is a network organization which is intelligent and learning-oriented as well as has problem solving capacities rather than a traditional passive organization which strictly follows standard operating procedures. In this perspective, integrated information work environment emerges as attractive work environment for the 21st century. Integrated information work environment is defined as an integrated electronic environment that is available to and readily accessible be each employee and is structured to provide immediate, individualized on-line access to the full range of information, software, guidance, advice and assistance, data, images, tools, and assessment and monitoring systems to permit job performance with minimal support and intervention by others. Case study was performed to measure the productivity improvement by implementing integrated information work environment in life insurance company. The results show that there is a number of indications of strong work productivity improvements.

• 한국응급구조학회지
• /
• 제14권2호
• /
• pp.25-40
• /
• 2010

Purpose : The purpose of this study was to develop and apply a Core Skill-TLP(Core Skill-Tutorial, Laboratory, Practicum) package in Patient Management and to effect of core skill-TLP education. Methods : This study was used to developed Patient Management' Core Skill-TLP package throughout 14 steps of Core Skill-TLP package development model. Then, Core Skill-TLP Learning methodology was implemented in first year student in the undergraduate emergency medical technology, and survey was done. Results : 1. Core Skill-TLP package model was presented based on conceptual model of PBL(S-PBL). 2, The student in OSCE did significantly better in clinical patient management core skills performance. 3. As to the satisfaction of Core Skill-TLP package management, student, tutor and self-satisfaction score was 3.21, 3.42, 3.38 respectively. Conclusion : This study was suggested that Core Skill-TLP education would be necessary with well-structured package and achieved advantage of simulation and PBL.

• Journal of Radiation Protection and Research
• /
• 제19권1호
• /
• pp.1-11
• /
• 1994

방사선 방어의 최적화 수행에는 적용의 다양함 등을 고려할 때, 절차론이 반드시 필요하게 된다. 본 연구에서는 발전소 설계 단계에서의 최적화 절차론을 제시하고, 이를 피폭 저감대안의 선정 문제에 적용하였다. 의사결정 보조기법으로는 다기준 기법을 사용하였으며, 그 결과 대안의 우선순위를 결정하고, 최적화의 결과를 실제 적용하는 문제를 분석하였다. 이러한 최적화 절차론은 발전소 이외에 방사성 폐기물 관리나 방사선의 의학적 이용 둥의 분야에도 적용될 수 있다.

• 한국IT서비스학회지
• /
• 제5권3호
• /
• pp.187-201
• /
• 2006

Nowadays, many organizations more increasingly show their interests in developing informations systems through not only in-house development but outsourcing. Selecting a proper information system developer, however, is not easy task partly due to the absence of evaluation criteria pertinent to explain the pros and cons of information system developers considered. Further, much care should be taken of choosing an appropriate decision method applicable to semi-structured or strategical decision making problems such as selection of information system developer even though evaluation criteria are well provided. The purpose of this paper is to provide for the selection process, ranging from identification of problem structure to solution method, of information system developer with the use of Analytic Hierarchy Process(AHP).