• 한국추진공학회지
• /
• 제18권6호
• /
• pp.75-81
• /
• 2014

우주발사체 이륙 시 발생하는 연소 후류에 의한 발사체 및 발사대 구조물에 대한 손상을 방지하기 위해 적절한 형상의 화염유도로가 구축되어야 한다. 화염유도로는 발사체로부터 배출되는 풀룸이 재순환되거나 역류가 발생하지 않는 적절한 형상으로 설계되어야 하며, 발사장 주변 여건과 운용되는 발사체의 엔진 특성이 반영되어야 한다. 본 논문에서는 한국형발사체 1단부 엔진 특성을 고려하여 화염유도로 기초 형상을 설계하였으며, 플룸을 추진제 연소가스 대신 공기로 가정한 전산유동해석을 통해 화염유도로 형상에 따른 연소 후류의 영향에 대해 분석하였다.

• 경영과정보연구
• /
• 제4권
• /
• pp.137-159
• /
• 2000

Recently, the importance of ISP(Information System Planning) has been increased because of rapid change and severe competition in business environments. Furthermore, the role of IS in the organization has included not only the supportive activities but also the strategic activities. Organizations can get the competitive advantages through the strategic use of IT by establishing effective and systematic ISP implementation. The main focus of this study is investigate the relationship among three subunits(organizational factors, the role of IS and effective ISP) based on the contingent settings which the process of ISP is implemented. The reasons that conceptual framework of this study is based on the contingent theory are as follow: First, ISP process itself has a series of complicated work which various elements in a company are involved. ISP externally must have the process to evaluate information technology (technology related with IS). Internally ISP process has a serious of works including determining information requirements to develop successful IS for other functional departments and identifying strategic opportunity of IS aligned with business strategy. Secondly, the activity of ISP is occurring on the continual basis. Business environments in which ISP process has implemented are changing continuously. Specific ISP methodology which was appropriate in a certain period of time does not work any more because of the rapid changes in business environments. For this reason managers can hardly expect successful ISP without considering external environments or internal environments such as organizational or management side. For this study, 240 survey questionnaires were mailed and 71 questionnaires were returned. 57 samples were used for the final analysis and 14 samples were excluded from analysis in that they didn't exercise official and systematic ISP. As the result of analysis, among the internal factors(organizational size, time frame of decision making, budget, management style, organizational culture) organizational culture, management style and time frame of decision making are identified as contingent factors on the effective ISP. The result of this study may have meaning in suggesting the way to develop effective ISP through the formalization of business process, more favorable users attitude toward IS and selection of an appropriate ISP methodology.

• 한국수소및신에너지학회논문집
• /
• 제21권5호
• /
• pp.425-434
• /
• 2010

Integrated gasification combined cycle (IGCC) is an efficient and environment-friendly power generation system which is capable of burning low-ranked coals and other renewable resources such as biofuels, petcokes and residues. In this study some process modeling on a conceptual entrained flow gasifier was conducted using the ASPEN Plus process simulator. This model is composed of three major steps; initial coal pyrolysis, combustion of volatile components, and gasification of char particles. One of the purposes of this study is to develop an effective and versatile simulation model applicable to numerous configurations of coal gasification systems. Our model does not depend on the hypothesis of chemical equilibrium as it can trace the exact reaction kinetics and incorporate the residence time calculation of solid particles in the reactors. Comparisons with previously reported models and experimental results also showed that the predictions by our model were pretty reasonable in estimating the products and the conditions of gasification processes. Verification of the accuracy of our model was mainly based upon how closely it predicts the syngas composition in the gasifier outlet. Lastly the effects of change oxygen are studied by sensitivity analysis using the developed model.

• 한국실내디자인학회논문집
• /
• 제16권4호
• /
• pp.12-20
• /
• 2007

This study, as discussed herein, tries to understand how modern commercial buildings occur and develop in certain type of social and cultural conditions. There are many words standing for modern society, of which the most remarkable one is 'commercial society'. Commercial society is where goods are manufactured to one's taste and consumption is a way of communication and a way of discriminating one from the others by using different code. Nowadays, architecture gets more and more popular and becomes commercial object which is intended to the sign of the social meaning. So, the sign of commercial buildings varies according to the social and cultural backgrounds and kitsch is applicable to it. The original meaning of kitsch, which usually is considered an inferior copy of an existing style, is examined and applied to architecture in order for comprehension. Throughout this study, the types of commercial buildings are selected and immanent meaning to the psychology of consumers as applicable to commercial buildings is considered. Also, the trend of kitsch in commercial buildings is analyzed by classifying the image and code of a building's shape. In a conclusion of the study, two major points can be found; commercial building has a significant meaning in terms of design, and commercial building is the conceptual result of a continuous change in the relationship between society and art.

• 한국정보통신학회:학술대회논문집
• /
• 한국해양정보통신학회 2010년도 춘계학술대회
• /
• pp.347-350
• /
• 2010

뉴 미디어 시대의 도래로 우리는 움직이는 영상 이미지의 세계에 살고 있다고 해도 과언이 아니다. 매체의 발달과 함께 일상에서는 이미지와 함께 순간을 지나며 느끼며 그것을 일부처럼 공존하며 소통하고 있다. 이러한 시대에 논리적이고 현실적인 사고보다 감각적이고 형상적인 이미지가 더 많은 것을 전달하고 설명하기도 한다. 움직이는 이미지를 보는 행위는 언어적이고 개념적인 의미의 전달 이전에 색채와 화면을 구성하고 있는 조형적인 요소와 그것들이 만들어내는 변화가 먼저 인식된다. 특히 서사의 구조를 가지는 영화영상 애니메이션에서는 그 영역이 더욱 크게 작용하며 이러한 장면의 이미지를 연결시키는 트랜지션의 기법 역시 본연의 단순한 기능에서 의미소통의 기능으로 확대되고 있다. 이러한 트랜지션 효과는 단순한 장면전환의 전통적 기법에서 시각적 유희성을 제공하고 서사의 흐름에 도움을 주는 내러티브 기능으로 수행되는 관점에서 시각적 표현의 연구는 지속되어야 한다.

• 한국산학기술학회논문지
• /
• 제8권4호
• /
• pp.900-914
• /
• 2007

본 연구는 부산지역 경제 활성화 및 실업률의 해소를 위하여 벤처기업 육성시책이 적극적으로 추진될 필요가 있다는 문제의식에서 부산지역 벤처생태계의 실태, 부산지역 벤처기업 육성지원 시책에 대한 현황파악 및 정책 수요자의 태도분석을 통한 정책적 함의 도출을 연구목적으로 한다. 분석기간으로는 벤처기업 육성지원 정책이 참여정부 출범을 기점으로 크게 변화되었기 때문에 참여정부의 정책이 명확히 제시되었던 2004년에서부터 2006까지를 주된 연구대상으로 한다. 연구결과에 따르면, 부산지역 벤처생태계는 양적 측면과 질적 측면 모두에서 대단히 취약함이 확인되었고, 참여정부의 정책변화에 따라 벤처여건은 악화될 가능성이 높은 것으로 확인된다. 또한 부산지역의 벤처육성 지원시책은 IT분야에 지나치게 편중되어 있어 지원대상의 다양화가 시급한 것으로 나타났다.

• 수산해양교육연구
• /
• 제10권1호
• /
• pp.100-113
• /
• 1998

The information society is characterized by rapidly increasing and changing information. Traditional models of learning and instruct on have emphasized forms of mastering the information in content domains. Storing information and being able to recall it has been central to formal education. But it is no longer possible to master content domains. This paper discusses constructivism as a shifting paradigm for educational research and practice in information society. Constructivism provides an alternative epistemological base to the objectivist tradition. Constructivism holds that there is a real world that we experience. However, the argument is that meaning is imposed on the world by us, rather than existing in the world independently of us. Meaning is seen as rooted in experience. The experience in which an idea is embedded is critical to the individual's understanding of that idea. From the constructivist perspective, learning is not a stimulus-response phenomenon. It requires self-regulation and the building of conceptual structures through reflection and abstraction. Problems are not solved by the retrieval of rote-learned right answers. The effective motivation to continue learning can be fostered by leading students to experience the pleasure that is inherent in solving problems chosen as one's own. Constructivism requires the change of the teacher's role from a knowledge transmitter to a coach or facilitator of student's understanding. Constructivist teachers inquire about students' understanding of concepts before sharing their own understandings of those concepts, and encourage students to engage in dialogue, both with them arid with one another. In Korea, the educational reform called open education has been spreading through out the country. There should be a paradigm shift in learning and instruction from objectivism to constructivism for better educational reform in Korea.

• 디지털융복합연구
• /
• 제16권11호
• /
• pp.313-327
• /
• 2018

인간의 노동을 기술이 대체하는 시대가 도래하고 있다. 제조영역에서 기업의 생산성을 증대시키기 위해 공장자동화(Factory Automation, FA) 및 스마트 팩토리(Smart Factory, SF)를 도입하는 것처럼, 서비스 영역 및 사무업무 영역에서도 RPA(Robotic Process Automation) 도입을 통해 기업의 경쟁력을 강화시키고 있다. 하지만, RPA 자체는 어디까지나 개념일 뿐 특정한 기술과 솔루션을 의미하지는 않으며, 소프트웨어 로봇이나 인공지능 개념을 기반으로 비즈니스 프로세스를 자동화하는 기술들의 새로운 개념이라고 할 수 있다. RPA도입 전후의 가장 큰 차이점은, 인간노동(Human Labor) 중심의 업무수행에서 디지털노동(Digital Labor)으로 사람의 노동력 자체를 대체한다는 것에 있다. 이렇듯 노동에 대한 시대적 개념이 변함에 따라, 미래 변화에 대한 정책적 논의가 필요한 시점이라 사료된다. 본 논문에서는 RPA에 대해 개괄적으로 살펴본 후, 산업동향 및 기술동향, 그리고 RPA 미래방향에 대한 이해를 통해 우리가 준비해야 할 고민에 대해 살펴보고자 한다.

• International Journal of Computer Science & Network Security
• /
• 제21권3호
• /
• pp.21-30
• /
• 2021

Economic transformations have led to an increase in the role of creative assets and their central role in public life. Changes in creative activity have led to a change in the organization of the work of institutes engaged in the training of specialists, in particular teachers of labor education. Methods and approaches to training determine the development of creative industries, being the basis for models of professional training of future teachers of labor training. The purpose of an article was to develop a modern model of professional training of future teachers of labor training based on the concept of creative economy. The methodology is based on the concepts of holistic craft and creative economy. Based on the integration of pedagogical learning models "Craft as design and problem-solving", "Craft as skill and knowledge building", "Craft as product-making" and "Craft as self-expression" developed and experimentally confirmed the conceptual model of professional training of future teachers of labor training. The proposed model forms a practitioner with professional, technical, digital and creative skills who is able to transfer the experience to students. The training course "Creativity and creative thinking" has been developed. The model provided for the development of a course based on the strategy of developing professional creativity, flexibility, improvisation, openness, student activity, joint practice, student-oriented approach. The practical value implies the adaptation of the developed model of professional training of future teachers of labor education during the training of teachers in higher education, which is confirmed in the experiment.

• 한국과학교육학회지
• /
• 제40권6호
• /
• pp.583-594
• /
• 2020

본 연구는 기존의 밀도라는 개념은 현상에 대한 원인자를 제공하는데 한계점이 있으며, 부력이라는 개념은 많은 오개념을 갖고 있고 정량적 계산을 이해하기 위해 지나치게 어려운 개념이 필요함에 문제를 제기하여 지레의 원리를 적용한 과정적 관점의 새로운 설명방식을 제안하였다. 새로운 설명방식은 중력이라는 근본원리와 과정적 관점이 드러나도록 지레라는 가시적 도구를 활용하여 제안되었다. 연구결과, 교사들은 많은 대안개념에 머물러 있었으며 밀도가 중력과 관련됨을 인식하는 교사는 절반이상 되지 않았다. 뿐만 아니라 이 현상을 물질적 관점으로 이해하면서 관점과 불일치하게 인식하였으나 수업처치 후 유의미한 개념 변화를 하였다(p<.000). 또한, 기존의 설명방식에 비해 원리와 과정적 관점을 잘 인식할 수 있다는 평가를 하였다. 이를 통해 지레의 원리를 도입한 과정적 과점의 설명방식에 대한 교육적 가치를 확인할 수 있었다.