• Title/Summary/Keyword: Triangle based

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Development of Right-Turning Channelization Design Models of Semitrailer at Intersections (평면교차로 세미트레일러 우회전 도류로 설계 모형 개발)

  • Lee, Suk-Ki;Park, Soon Yong;Jeong, Jun-Hwa;Lee, Ju-Hwan
    • International Journal of Highway Engineering
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    • v.16 no.2
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    • pp.99-106
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    • 2014
  • PURPOSES : This study is to develop Right-Turning Channelization Design Models of Semitrailer at Intersections by regression of vehicle tracking simulation. METHODS : Based on the literature review, it was indicated that right-turning channelization design guide of semitrailer is too complex and is not reflected turning speed and approach angle. To verify effectiveness of right turning semitrailer trajectories according to the changing turning speed and approach angle, vehicle tracking simulation was executed. And then, simulation results were analyzed for modeling design elements; minimum turning radius, swept path width, arc length, width of triangle island, of right-turning channelization using regression methods. RESULTS : When the turning speed is getting higher, minimum turning radius, arc length, width of triangle island increased and the approach angle lower, swept path width, arc length, width of triangle island reduced. The turning radius completely reflected by turning speed. CONCLUSIONS : In this research, it was investigated how much design elements are changed according to the turning speed and the approach angle of semitrailer. The developed right-turning channelization design models can help engineers to easy and comfortable design at various conditions.

Height Recognition of Building Using Trigonometric Function (삼각함수를 이용한 건물 높이 인식)

  • Shin, Seong-Yoon;Baek, Jeong-Uk;Lee, Hyun-Chang;Rhee, Yang-Won
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2010.10a
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    • pp.641-642
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    • 2010
  • Trigonometric functions is the study based on the most simple and unique properties of right triangle that if an angular size was settled, the value of the ratio of these sides is constant regardless of the size of the triangle. If it is the angle of right triangle with the length of the lower base and the measured angle of building, the height of the building can be obtained by using trigonometry. it is considered as a good way to gauge the height of the building as the car moves.

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An Efficient Vector Quantization Codebook generation using a Triangle Inequality (삼각 부등식을 이용한 빠른 벡터 양자화 코드북 생성)

  • Lee, Hyun-Jin
    • Journal of Digital Contents Society
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    • v.13 no.3
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    • pp.309-315
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    • 2012
  • Active data are the input data which are changed its membership as Vector Quantization codebook generation algorithm is processed. In the process of VQ codebook generation algorithm performed, the actual active data out of the entire input data will be less presented as the process is performed. Therefore, if we can accurately find the active data and only if we are going to do VQ codebook generation on the active data, then we can significantly reduce the overall generation time. In this paper, we presented the triangle inequality based algorithm to select the active data. Experimental results show that our algorithm is superior to other methods in terms of the VQ codebook generation time.

Simulation of (R)- and (S)- Ketoprofen Separation in Simulated Moving Bed (SMB) ((R)-케토프로펜과 (S)- 케토프로펜 분리를 위한 유사 이동층 크로마토그래피의 전산모사)

  • Lee, Il Song;Lee, In Su;Kim, In Ho
    • KSBB Journal
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    • v.29 no.4
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    • pp.250-262
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    • 2014
  • A simulation study for finding purity changes of extract and raffinate as well as the best purity of (S)-ketoprofen in simulated moving bed (SMB) was performed with changing parameters of $m_2$ and $m_3$ from triangle theory. Aspen simulator allowed separation process simulation of (R)- and (S)-ketoprofen in SMB and compared 4-bed SMB and 8-bed SMB based on the same Henry constant and mass transfer coefficient. The 4-bed SMB consisted of 4 columns (200 mm of length, 10 mm of diameter) and the 8-bed SMB constructed by 8 columns (100 mm of length, 10 mm of diameter), and therefore total column length was made the same as 800 mm. Considering purities of both (R)-and (S)-ketoprofen, both 4-bed SMB and 8-bed SMB had the best purity when $m_2$ and $m_3$ were on 12.0 and 13.0 in the center of triangle. Taking only (S)-ketoprofen into account, 4-bed SMB as well as 8-bed SMB had the best purity when $m_2$ and $m_3$ were on 10.9 and 12.6 in the left outside triangle, and their purities were 93.3 % for 4-bed SMB and 96.9 % for 8-bed SMB.

Investigation of Trend in Virtual Reality-based Workplace Convergence Research: Using Pathfinder Network and Parallel Neighbor Clustering Methodology (가상현실 기반 업무공간 융복합 분야 연구 동향 분석 : 패스파인더 네트워크와 병렬 최근접 이웃 클러스터링 방법론 활용)

  • Ha, Jae Been;Kang, Ju Young
    • The Journal of Information Systems
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    • v.31 no.2
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    • pp.19-43
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    • 2022
  • Purpose Due to the COVID-19 pandemic, many companies are building virtual workplaces based on virtual reality technology. Through this study, we intend to identify the trend of convergence and convergence research between virtual reality technology and work space, and suggest future promising fields based on this. Design/methodology/approach For this purpose, 12,250 bibliographic data of research papers related to Virtual Reality (VR) and Workplace were collected from Scopus from 1982 to 2021. The bibliographic data of the collected papers were analyzed using Text Mining and Pathfinder Network, Parallel Neighbor Clustering, Nearest Neighbor Centrality, and Triangle Betweenness Centrality. Through this, the relationship between keywords by period was identified, and network analysis and visualization work were performed for virtual reality-based workplace research. Findings Through this study, it is expected that the main keyword knowledge structure flow of virtual reality-based workplace convergence research can be identified, and the relationship between keywords can be identified to provide a major measure for designing directions in subsequent studies.

Determination of equivalent blasting load considering millisecond delay effect

  • Song, Zhan-Ping;Li, Shi-Hao;Wang, Jun-Bao;Sun, Zhi-Yuan;Liu, Jing;Chang, Yu-Zhen
    • Geomechanics and Engineering
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    • v.15 no.2
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    • pp.745-754
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    • 2018
  • In the analysis of the effects of rock tunnel blasting vibration on adjacent existing buildings, the model of simplified equivalent load produces higher calculation result of vibration, due to the lack of consideration of the millisecond delay effect. This paper, based on the static force equivalence principle of blasting load, proposes a new determination method of equivalent load of blasting vibration. The proposed method, based on the elastic-static force equivalence principle of stress wave, equals the blasting loads of several single blastholes in the same section of millisecond blasting to the triangle blasting load curve of the exploded equivalent elastic boundary surface. According to the attenuation law of stress wave, the attenuated equivalent triangle blasting load curve of the equivalent elastic boundary is applied on the tunnel excavation contour surface, obtaining the final applied equivalent load. Taking the millisecond delay time of different sections into account, the time-history curve of equivalent load of the whole section applied on the tunnel excavation contour surface can be obtained. Based on Sailing Tunnel with small spacing on Sanmenxia-Xichuan Expressway, an analysis on the blasting vibration response of the later and early stages of the tunnel construction is carried out through numerical simulation using the proposed equivalent load model considering millisecond delay effect and the simplified equivalent triangle load curve model respectively. The analysis of the numerical results comparing with the field monitoring ones shows that the calculation results obtained from the proposed equivalent load model are closer to the measured ones and more feasible.

An Analysis on the Actual Condition of Land Expropriation System of Local Governments and Its Improvement Plan (지방자치단체 토지수용제도 실태분석과 개선방안)

  • Kim, Hyeong-Geun;Kim, Boo-Sung;Lim, Dong-Jin;Kim, Dong-Hyun
    • The Journal of the Korea institute of electronic communication sciences
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    • v.6 no.6
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    • pp.929-937
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    • 2011
  • This thesis is intended for addressing issues of the local expropriation committee system by drawing the policy suggestion through theoretical considerations on the land expropriation system of the UK and of the US, and for finding a plan to improve the system by focusing on the examples of land expropriation of local governments. The US' Takings utilize a public hearing and the jury system. When property is expropriated through eminent domain, stakeholders and citizens share the necessity of the expropriation and its awareness through a public hearing, and project institutes (administrative organizations) file a lawsuit to a law court to exercise takings. In the case of Compulsory Purchase in the UK, the system should be based on laws established by the Parliament, and the resolution to use CPO is also decided by district councils. So the system is able to prevent power abuse. As a plan to improve the land expropriation committee of local governments, it is necessary ${\triangle}$ to enhance the professionality of the local land expropriation committee, ${\triangle}$ to expropriate lands by the analysis of land type, and ${\triangle}$ to come up with alternative measures to prevent the rights of the expropriated.

The Change of Media and Emerging Journalistic Norm and Value: An exploration Based on the Young-hee Rhee's Idea (뉴미디어 환경과 언론인 직업 규범의 변화: 리영희 언론정신을 통한 탐색연구)

  • Lee, Bong-Hyun
    • Korean journal of communication and information
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    • v.59
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    • pp.31-49
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    • 2012
  • This study investigates normative role model of the journalists under the changing environment. Firstly, this article explores what pressure the new media environment gives to the journalists in their routine of news production and distribution. These are stated from the angle of epistemological, professional and interactive pressure. Next, as a reference for the standard journalism in the age of mass media, the idea of Rhee Young-hee, a late journalist who won respects from many Korean journalists, is studied. His firm belief in the pursuit of hard facts, rigorous investigative writing and expertism are spelt out. Then, this study explores how, in real term, this pressure changes the journalistic value, norm and practices in the newsroom. Ten of Koran journalists are interviewed in order to get their idea about the emerging journalistic standards under the digital environment. From this in-depth interviews, it is conclued that the pursuit of hard fact, investigative writing, expertism of Rhee Young-hee are, nonetheless the change of the media technology, still effective and provide good reference points for the enhancement of the standard of journalism in Korea. However, it is also suggested that the methods to fulfil desirable journalism in the digital age should be different from that of the mass communication age. The interviewees make propose that the journalist, as a network node, news curator or coordinator, should actively interact with the audiences facilitating their enhanced potential as a news 'prosumer'(producer and consumer).

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The Effects of Face Types and A Detail of Clothes on Visual Evaluation (얼굴유형과 의복 네클라인과의 조화연구)

  • Mun, Nam-Won
    • Journal of the Korean Society of Costume
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    • v.35
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    • pp.305-324
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    • 1997
  • The purpose of this study was to examine aesthetic effects of face type and necklines of one piece dress one of details in clothes on visual evaluation. For this study two set of stages were processed. At first stage data were collected from female college students in Kwang Ju.Chonnam. Subjects between the aged of 18-26 were took pictured of their faces then they were classified into 7 groups That is egg ob-long round square inverted triangle triangle and diamond shapes. At second stage two sets of experimental design were utilized based on the classified face types. A set of design was 5$\times$4 design which involved 5 levels (egg oblong round inverted triangle and diamong shape) of face type and 4 levels(round boat vee and square neckline) of basic neckline. Another set of de-sign also was 5$\times$4 design which involved 5 levels of face type and 4 levels of modified neckline. As experimental treatment the stimulus materials and questionnaires were employed. The qustionnaires were consisted of visual evaluations on the stimulus materials by using semantic differential scale,. The experiments were proceeded through 2 week by 30 subjects composed of gaduate students and staffs in some departments of Clothing and Textiles at college. Data were analyzed by Frequencies Mean Factor Analysis TTest ANOVA and Ducan's Multiple Range Test. The major results were as followed: 1. There were significant aesthetic effects of face type on visual evaluations, Especially egg and inverted triangle shape among the face types were evaluated more aesthetic than the other face shapes. 2. There were signifiant aesthetic effects of the neckline types on visual evaluations, Es-pecially vee neckline among necklines were more aesthetic than the other necklines,. 3. As compared with the basic neckline types and the modified neckline types the modified necklines were assessed more aes-thetically than the basic necklines. 4, The face type and he neckline type were influenced interactively on visual evauations Specifically it showed that oblong round and diamond shape of face type were matched to vee neckline more than the other necklines, Also it showed that the egg and inverted tri-angle shape wee matched to round vee and squre neckline more than boat neckline.

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A Simple Way to Find Face Direction (간단한 얼굴 방향성 검출방법)

  • Park Ji-Sook;Ohm Seong-Yong;Jo Hyun-Hee;Chung Min-Gyo
    • Journal of Korea Multimedia Society
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    • v.9 no.2
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    • pp.234-243
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    • 2006
  • The recent rapid development of HCI and surveillance technologies has brought great interests in application systems to process faces. Much of research efforts in these systems has been primarily focused on such areas as face recognition, facial expression analysis and facial feature extraction. However, not many approaches have been reported toward face direction detection. This paper proposes a method to detect the direction of a face using a facial feature called facial triangle, which is formed by two eyebrows and the lower lip. Specifically, based on the single monocular view of the face, the proposed method introduces very simple formulas to estimate the horizontal or vertical rotation angle of the face. The horizontal rotation angle can be calculated by using a ratio between the areas of left and right facial triangles, while the vertical angle can be obtained from a ratio between the base and height of facial triangle. Experimental results showed that our method makes it possible to obtain the horizontal angle within an error tolerance of ${\pm}1.68^{\circ}$, and that it performs better as the magnitude of the vertical rotation angle increases.

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