• 한국기계가공학회지
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• 제14권2호
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• pp.38-43
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• 2015

Tungsten inert gas (TIG) welding is commonly used in industries that require airtightness, watertightness, oiltightness, and precision. It is a non-consumable welding method that is commonly used for the welding of non-ferrous metals, but it can be used to weld most metals. The methods of TIG welding can be divided into three types. The first, manual welding is done directly on the metal by a welder with a torch. The second, semi-automatic welding, gets help from a material supplying machine, but it is conducted by a welder. Lastly, automated welding is conducted fully by a machine during its process and operation. Depending on the selection of electrode, the amount of heat that is applied to the base material and the electrode rod changes and makes the shape of welded parts different. A direct-current positive electrode was used for this study. Through the change of shielding gas type on a structural steel (SS-400) that is commonly used in industry, the composition and shape changes in welded parts were detected after welding. The heat-affected area, hardness value, and tensile strength were also identified through hardness testing and tensile testing. In this study, it was found that the higher hardness value of the heat-affected is, the weaker the tensile strength becomes.

• International Journal of Computer Science & Network Security
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• 제24권2호
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• pp.79-88
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• 2024

The use of the social media has become part of our daily life activities. The social web channels provide the content generation facility to its users who can share their views, opinions and experiences towards certain topics. The researchers are using the social media content for various research areas. Sentiment analysis, one of the most active research areas in last decade, is the process to extract reviews, opinions and sentiments of people. Sentiment analysis is applied in diverse sub-areas such as subjectivity analysis, polarity detection, and emotion detection. Stance classification has emerged as a new and interesting research area as it aims to determine whether the content writer is in favor, against or neutral towards the target topic or issue. Stance classification is significant as it has many research applications like rumor stance classifications, stance classification towards public forums, claim stance classification, neural attention stance classification, online debate stance classification, dialogic properties stance classification etc. This research study explores different feature sets such as lexical, sentiment-specific, dialog-based which have been extracted using the standard datasets in the relevant area. Supervised learning approaches of generative algorithms such as Naïve Bayes and discriminative machine learning algorithms such as Support Vector Machine, Naïve Bayes, Decision Tree and k-Nearest Neighbor have been applied and then ensemble-based algorithms like Random Forest and AdaBoost have been applied. The empirical based results have been evaluated using the standard performance measures of Accuracy, Precision, Recall, and F-measures.

• 한국조경학회지
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• 제42권6호
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• pp.89-100
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• 2014

캠퍼스코어는 최고학문기관인 대학교의 물리적 기능적 상징적 중심환경인 까닭에, 개교 당시의 교육이념뿐만 아니라, 변모되는 시대적 가치를 은유적으로 대변한다. 오늘날 대학은 기능측면에서는 지역사회와의 적극적인 소통을, 물리적 환경측면에서는 보행친화형 캠퍼스로의 개조를 요청받고 있다. 이에 본 연구는 보행친화환경의 측면에서 캠퍼스코어의 개념을 이해하면서 다양한 선행사례의 검토를 통해 현실적 관점에서 지방 국립대학교 캠퍼스코어의 개조전략을 제안하였다. 공공적 복합용도의 도입기회와 연계하여 차량 중심으로 왜곡되었던 공간구조를 보행친화형으로 개조하기 위한 계획적 준거들을 제안한 본 연구는 기존 캠퍼스코어의 보행친화형 동선체계로의 전략적 개편과 토지이용의 부분적 수정이 가능할 뿐만 아니라, 소기의 효과를 발휘할 수 있다는 것을 뒷받침하여준다. 이러한 측면에서 본 연구의 성과는 오늘날 캠퍼스코어의 의미와 가치를 되돌아보게 하면서 유사한 정비계획에 유효한 시사점을 제공할 것이다.

• The Journal of Asian Finance, Economics and Business
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• 제4권3호
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• pp.57-73
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• 2017

In the current competitive marketplace of real estate business, tenant satisfaction measurement is one of the important indicators to monitor competitiveness in industrial property development. It has become an industry standard to measure tenant satisfaction, commonly called customer satisfaction. Customer satisfaction has become the widely used metric to manage customer loyalty (Keiningham, Gupta, Aksoy, & Buoye, 2014). The aim of this research is to determine the impact of property management services on tenants' satisfaction with the three identified variables i.e. facility management, perceived quality and lease management. Structural equation modeling (SEM) is applied to build constructs and test the hypotheses with the collected survey samples. Of the three variables, facility management is the most influential factor that leads to tenant satisfaction with industrial buildings. Next, perceived quality is another important factor that contributes to tenants' pleasure. Compared with these two, lease management fares worse, having the least extensive effect on tenant satisfaction, and could be disregarded. The ultimate impact of tenant satisfaction is about tenant retention and recommendation. The overall findings of this research will potentially help real estate developers to develop a better property management system, leasing program and tenant retention strategy.

• 한국환경복원기술학회지
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• 제16권3호
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• pp.55-62
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• 2013

Generally, the radioactivity from NPP(Nuclear Power Plants) operation can be released below 3% of DRLs(Derived Release Limits) to environment. It was tried to understand which plant was efficient for absorbing radioactivity in this study. Pinus thunbergii Parl. and Viburnum awabuki K. KOCH were analyzed for radioisotope absorption. The samples were collected at three different locations depending on the distance from NPP at the vicinity 10km away, and 30km away. Gamma radionuclide was not detected from the samples, which means that the direct transition into the plant was not significant. Meanwhile, the very low level of radioactive tritium was detected in the samples. One remark was that every plant has different ability for tritium absorption. These results are expected to be applied to propagation and transplanting in radioactively contaminated area or reducing radioactivity in the soil and water near the plants.

• 교육시설 논문지
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• 제26권5호
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• pp.17-23
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• 2019

The classroom is a learning space where students live mainly in school, and it is the most important space within the entire educational space of the school. Although our educational system has been trying to revise and change the curriculum many times, it still does not provide space for the educational concept of modern society. The impact of the abolished 'school facility standard design' in 1992 is still evident in the design of school facilities at present. Specifically, the uniformity of the educational space, the rigid boundary of the classroom unit, the blockage between the school facility and the outside, and the separation due to the break of the inner and outer spaces. In the future, we need a flexible space that can contain the contents of the future education, and it is necessary to study the composition and type of educational space that can escape uniformity and spatial breakdown. In this paper, we analyze the successful cases of Irvine school facilities and examine the type and composition of classroom space, and it will be a task to find the direction and change of thinking about our educational space.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2007년도 추계학술대회 논문집
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• pp.173-177
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• 2007

This paper describes the simulations on the actual measurement analysis and lighting design for recreational sports facility. Based on illumination requirements, sports may be divided into multidirectional sports and unidirectional sports. Typical multidirectional aerial sports include Jokcu. These sports require well distributed horizontal illumination and uniformity according to aiming. Therefore, this paper estimates horizontal illuminance and uniformity ratio by actual measurement of sports lighting at recreational Jokcu court in Cheju National University and evaluation of sports lighting conditions for optimal design by computer simulation.

• 천문학회보
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• 제43권1호
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• pp.69.1-69.1
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• 2018

Astronomy education and research can benefit from a high performance telescope that is easily accessible in campus. Such a facility allows hands-on education of observations, small research projects, test of new instruments, and time-domian study of astronomical phenomena. Recently, SNU reconstructed a 40-year old observatory (also known as 구천문대), and established the new SNU Astronomical Observatory (SAO) on that site. On 2018 March 27, the 1-m optical telescope was successfully installed at SAO. Since then, this telescope has been producing wonderful images. This poster will give an overview of the 1-m telescope, and its performance.

• 천문학회보
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• 제43권2호
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• pp.56.1-56.1
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• 2018

Astronomy education and research can benefit from a high performance telescope that is easily accessible in campus. Such a facility allows hands-on education of observations, small research projects, test of new instruments, and time-domian study of astronomical phenomena. Recently, SNU reconstructed a 40-year old observatory (also known as 구천문대), and established the new SNU Astronomical Observatory (SAO) on that site. On 2018 March 27, the 1-m optical telescope was successfully installed at SAO. Since then, this telescope has been producing wonderful images, with the best seeing value recorded being as small as 0.85 arcsec. This poster will give an overview of the 1-m telescope, and its performance based on test observations during the 2018A semester.

• 대한공간정보학회지
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• 제10권4호
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• pp.69-76
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• 2002

오늘날에 정보는 토목공학에서 매우 중요하다. 대개 이 정보는 측량 및 지형공간정보체계로부터 획득된다. 또한 이 정보는 지능형교통체계(ITS), 항법, 시설물 관리, 그리고 수치지도제작, 기타 등의 분야에서 매우 중시되고 또한 앞으로 다양한 분야에서 응용될 것이다. 그리고 측량분야에서, GPS 위성이 새로이 도입되어 중요한 역할을 하고 있다. 본 연구에서는 GPS 위성을 이용한 측위기술 중 하나인 실시간 동적측량(RTK)을 대학의 평면도 제작에사용하였다. 이를 통해 화단 일부분과 도로에 대한 정보를 회득할 수 있었지만 주위 건물에 대해서는 회득이 불가능 하였다. 그러므로 이것은 전채 작업에서 작업의 효율성을 저하시키게 된다. 그래서 이런 경우 토탈스테이션, 평판, 그리고 데오도라이트 등이 기타 보조장비가 사용되어야 할 것으로 기대된다.