• Title/Summary/Keyword: 인식실험

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Design and Implementation of Multi Exposure Smart Vehicular Camera Applying Auto Exposure Control Algorithm Based on Region of Interest (관심 영역 기반의 자동 노출 조절 알고리즘을 적용한 다중 노출 차량용 스마트 카메라의 설계 및 구현)

  • Jeon, Yongsu;Park, Heejin;Yoon, Youngsub;Baek, Yunju
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.42 no.1
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    • pp.181-192
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    • 2017
  • Recently, many researches are carried out for Advanced Driver Assistant Systems(ADAS). Especially, many studies are carried out to analyze the road situation using road images. In order to improve the performance of the road situation analysis, it is necessary to acquire images with appropriate exposure time. In this paper, we design and implement multi exposure smart vehicular camera which provides road traffic information to driver. Proposed device can acquire road traffic information by on-board camera and various sensors. And we propose an auto exposure control algorithm for the road environment to increase accuracy of image recognition. In addition, we also propose the switching ROI method that apply existing ROI techniques to overcome a limited computation power of embedded devices. We developed prototype of multi exposure smart vehicular camera and performed experiments to evaluate proposed auto exposure control algorithm and switching ROI method. The results show that the average accuracy of image recognition increased by 13.45%.

Interaction Effects of Crisis Responsibility and SNS Interactivity on Acceptances of Crisis Response Strategies in the case of CEO in Crisis (CEO 위기책임성과 SNS 상호작용성이 위기 대응 전략 인식에 미치는 영향)

  • Liu, Le;Choi, Youjin
    • The Journal of the Korea Contents Association
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    • v.20 no.3
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    • pp.59-72
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    • 2020
  • Previous crisis management research has mainly focused on business organizations' responsibility for crises, and yet research on CEOs in crisis still lacks. This research examined the influences of crisis responsibility and response strategies on attitudes toward a CEO, attitudes toward a corporate, and purchase intentions in the case of CEOs in crisis. In addition, this study explored how a CEO's SNS interactivity during normal times moderates the influences of crisis responsibility and response strategies. A 2(responsibility: high vs. low)X2(strategy: defensive vs. apology)X2(interactivity: high vs. low) experimental design was conducted with 200 Chinese students in Seoul. According to the analysis results from effects of response strategies by CEO's crisis responsibility levels, regardless of the crisis responsibility levels, the apology strategy was more effective than the defensive strategy in terms of CEO attitudes, corporate attitudes, and purchasing intentions. The analysis results about the moderating role of SNS interactivity during normal times show that under the CEO's high responsibility condition, keeping high SNS interactivity during normal times and using the apology after crisis brought out most favorable responses. Under the CEO's low responsibility condition, regardless of the SNS interactivity levels, the apology strategy brought out more favorable responses than the defensive strategy.

Sensitivity Analysis of Dynamic Characteristics of Structural Systems by the Transfer Matrix Method and the Combined Finite Element-Transfer Matrix Method (전달매트릭스법 및 유한요소-전달매트릭스 결합방법에 의한 구조계의 동특성 감도해석)

  • D.S. Cho;K.C. Kim
    • Journal of the Society of Naval Architects of Korea
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    • v.29 no.1
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    • pp.143-157
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    • 1992
  • For the design of structural systems having the prescribed or optimum dynamic characteristics, some design changes of the initially designed system are required. In these cases, if the sensitivity analysis which can predict the changes of dynamic characteristics due to the changes of design variables is applied, the design changes can be carried out rationally and very efficiently. For many structural systems, it is well known that the analysis by the transfer matrix method(TMM) and the combined finite element-transfer matrix method(FETMM) is more efficient than the analysis by the finite element method. However, most known studies on the sensitivity analysis of structural systems premise using the finite element method. In this paper, the sensitivity analysis methods by the TMM and the FETMM are presented and some numerical investigations on the beam-column with elastically restrained ends and intermediate contraints and the stiffened plate having subsystems are carried out. The results of the numerical examples show good accuracy and computational efficiency of the presented methods, and show that the application of sensitivity analysis in the dynamic characteristic reanalysis give good results within the practically changeable range of design variables.

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Walking Assistive Shoes for Visually Impaired Person Using Infrared Sensor and Pressure Sensor (적외선 센서와 압력센서를 이용한 시각장애인용 보행보조신발)

  • Yang, Chang-Min;Jung, Ji-Yong;Kim, Jung-Ja
    • Journal of rehabilitation welfare engineering & assistive technology
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    • v.11 no.2
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    • pp.147-156
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    • 2017
  • The white cane, walking assistive device of visually impaired person, has disadvantages for acquiring the information by contacting obstacles directly and detecting low obstacle on the ground. Recently, new devices have been developing to solve these problems, but these were not widely used due to high price and appearance. Therefore, in this study, we developed two types of walking assistive shoes which were manufactured with infrared sensors, pressure sensors and vibrating motors. Two types of shoes were classified with single sensor (SS) and double sensor (DS) type according to the number of infrared sensor. To evaluate the effectiveness, we compared required time and number of collisions during walking with walking assistive shoes and white cane on obstacle area. As the results, required time was increased than white cane while number of collisions was decreased when walking with developed walking assistive shoes. In addition, required time and number of collisions was more reduced when using walking assistive device than white cane. Therefore, we suggests that developed walking assistive shoes can a great help to provide safe walking condition and reducing time to adapt new types of walking assistive shoes.

A Exploratory Study on the Differences of Innovativeness, Perceived Value, and Buying Intention among Convergence Types (컨버전스 유형에 따른 혁신성, 지각된 가치, 구매의도의 차이에 대한 탐색적 연구)

  • Kim, Moon-Tae
    • Management & Information Systems Review
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    • v.33 no.1
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    • pp.219-235
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    • 2014
  • This study investigate the smart phone that is not included in the studies that test the effect of added functionalities to convergence products. There are several questions that PDA, MP3 players that are added a certain function can be good convergence product that consumers love and these are the products that has problem of decrease of sales volume because of the development of smart phone. It is a little bit strange to test these product for this study, so this study suggest a little different research tool compared to the past studies. The research implications are follows like theses. Brand awareness is important factor that decrease the uncertainties and risks specially when a innovative tech is added to smart phone. A situation that a innovative tech is added to smart phone is best to get the consumer's perceived innovativeness, value, and buying intention. And a situation that a innovative tech is added to smart phone in the context of low brand awareness is better than a situation that various normal teches are added to it.

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Gas Chromatographic and Mass Spectrometric Determination of Alcohol Homologues in the Korean Folk Sojues (Distilled Liquor) (기체크로마토그래피 및 질량분석법에 의한 민속 소주중의 알코올 동족체 분석)

  • Lee, Dong Seon;Park, Hye Seong;Kim, Geon;Lee, Taek Su;No, Bong Su
    • Journal of the Korean Chemical Society
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    • v.38 no.9
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    • pp.640-652
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    • 1994
  • This work is undertaken to determine alcohol homologues so-called fusel oil that may be present in the Korean folk sojues (distilled liquor) made from grains and to describe sample preparation and analytical method by GC-FID-MS. Solid phase extraction method for sample preparation by using porous styrene divinyl benzene polymer (Porapak Q) was compared with steam distillation and solvent extraction method. Retention behaviors of homologous series of alcohols were also studied. Log values of retention time, molecular weight, boiling point, and capacity factor of alcohols showed linear correlations to the carbon number of an alcohol, to the oven temperature, and to the dielectric constant. Components such as methyl alcohol, n-propyl alcohol, isobutyl alcohol, isopentyl alcohol, and phenethyl alcohol have been identified. The more amount of isopentyl alcohol than other alcohols are contained in the Korean folk sojues, while that of n-propyl alcohol are contained in Chinese kaoliangchiew. Degree of similarity or dissimilarity and classification of the individual samples were discussed using multivariate statistical analysis(principal components analysis) based on GC data.

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당류산업

  • 임재각
    • Food Industry
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    • s.181
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    • pp.38-67
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    • 2004
  • 예로부터 인간은 단맛에 강한 욕구를 가지고 있었다. 따라서 설탕, 포도당, 과당 등 단맛이 강한 감미료를 선호하여 왔고, 현재까지도 식품 제조시 가장 널리 사용되고 있다. 그러나 최근에는 국민의 건강에 대한 관심이 고조 되고 설탕으로 대표되는 전통적인 일반 감미료의 충치, 비만, 당뇨병 유발 등의 부정적인 측면이 부각되고 있을 뿐만 아니라, 식품에 대한 건강 기능성이 강조되면서 기능성 감미료가 주목 받고 있다. 특히 고도의 경제성장 및 국민 소득의 향상에 따라 차별화된 기능성 감미료의 생산을 요구하는 실정이다. 이와 관련하여, 현재 식품 산업계에서는 올리고당류, 당알콜류, 고감미 감미료류 등에 많은 관심을 가지고 연구 개발에 집중하고 있다. 올리고당류의 대표적인 제품은 프락토올리고당, 갈락토올리고당, 이소말토올리고당 등이다. 현재 올리고단 시장은 성숙기로서 성장속도가 둔화되고 있으나, 최근 American Association of Cereal Chemists(AACC)등 세계적인 협회에서 수용성 식이섬유를 다당류, 올리고당, 리그닌 등을 포함하여 새롭게 정의하였고 이에 따라 해외에서는 프락토올리고당을 중심으로 수용성 식이섬유로 용도 사용이 가능하게 되었을 뿐만 아니라, 식이섬유로 표기도 가능하게 되어 수요가 증가할 것으로 예상된다. 국내에서는 아직 올리고당을 식이섬유로 사용하지는 못하고 있으나, 식품 공전 개정을 통해 식이섬유로 표기 가능하도록 수정될 전망이다. 당알콜류는 솔비톨 및 자일리톨이 주류를 이루고 있다. 솔비톨은 시장에 가장 먼저 소개된 당알콜류인데 저가여서 그동안 가장 큰 시장을 형성하고 있었으나 최근 3년 동안 자일리톨껌이 최대의 히트 상품이 되면서 자일리톨이 급성장하였다. 그 외에는 만니톨, 에리스리톨, 말티톨, 이소말트 등이 있다. 최근에는 말티톨을 중심으로 다양한 응용 연구 및 이소말트 및 에리스리톨 등을 생산 판매하고 있는 다국적 기업의 판촉 활동 등으로 당알콜류 시장의 새로운 변화가 예상된다. 고감미 감미료류는 스테비오사이드와 아스파탐이 주류를 이루고 있었지만, 최근 아세설팜 K 및 수크랄로스가 잇따라 식품으로써 사용 허가를 받으면서 시장이 재편되고 있다. 하지만, 해외에 비하여 국내의 고감미 감미료 시장은 매우 작고 성장률도 낮은 편인데 그 이유로는 국민 정서상 천연이 아닌 합성에 대한 부정적 인식과 맛에 대한 거부감 때문인 것으로 생각된다. 이와 관련하여 최근에는 다양한 감미질 및 Multi sweetener system 연구를 통해 설탕과 유사한 맛을 내는 혼합 기술 개발에 관한 연구가 진행되고 있다. 따라서 향후에는 해외의 선진국과 같이 고감미 감미료 시장도 점차적으로 확대될 것으로 예상된다. 기타 대체 감미료로는 타가토스, 트레할로스, 아라비노스 등이 있다. 이중에서 특히 해외에서 크게 기대를 모으고 있는 타가토스는 최근 국내 인증을 받아 시장 진출을 준비 중에 있다. 아라비노스는 양질의 감미를 갖는 천연 펜토오스인데 연구용 시약 이외에는 지금까지 거의 이용되지 않았다. 그러나 최근 아라비노스가 설탕의 소화흡수를 선택적으로 억제한다는 흥미 있는 결과가 임상 및 동물실험에서 확인되어 향후 제품으로써 개발을 기대할 수 있게 되었다. 이들 감미료는 기존 설탕이 가지는 문제점을 많은 부분 극복할 것으로 여겨지며, 이로 인해 수요는 점차 증가할 것으로 생각되며, 높은 경제적 부가 가치를 창출할 것으로 예상되어 진다. 생산 기술 적인 측면에서 건강 지향적 천연소재 감미료에 대한 선호가 날로 증가하는 추세에 따라 기존에 주로 사용되었던 화학합성법보다는 천연 이미지의 생물공학적인 방법에 의한 감미료 생산이 각광을 받을 것으로 예상된다. 생물공학적인 방법을 감미료 소재 개발에 응용하게 되면, 기존에 사용되었던 화학합성법 등이 가지는 환경적인 문제, 반응 부산물 생성에 따른 분리, 정제에서의 비용증가 등의 문제점을 해결할 수 있을 것으로 여겨지며, 고정화 방법의 도입 등을 통해 생산성 향상을 도모할 수 있다. 본 장에서는 감미료 소재 개발에 건강 지향적 국민 정서를 반영하고, 국내외 감미료 시장의 흐름을 파악하여 당류 산업의 발전적인 변화에 대처하고자 하였으며, 이를 통해 당류산업의 고부가가치 첨단산업으로서의 육성방안을 논의하고자 하였다.

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An Efficient Walkthrough from Two Images using Spidery Mesh Interface and View Morphing (Spidery 매쉬 인터페이스와 뷰 모핑을 이용한 두 이미지로부터의 효율적인 3차원 애니메이션)

  • Cho, Hang-Shin;Kim, Chang-Hun
    • Journal of KIISE:Computing Practices and Letters
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    • v.7 no.2
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    • pp.132-140
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    • 2001
  • This paper proposes an efficient walktlu-ough animation from two images of the same scene. To make animation easily and fast, Tour Into the Picture(TIP) enables walkthrough animation from single image but lacks the reality of its foreground object when the viewpoint moves from side to side, and view morphing uses only 2D transition between two images but restricts its camera path on the line between two views. By combining advantages of these two image-based techniques, this paper suggests a new virtual navigation technique which enable natural scene transformation when the viewpoint changes in the side-to-side direction as well as in the depth direction. In our method, view morphing is employed only in foreground objects , and background scene which is perceived carelessly is mapped into cube-like 3D model as in TIP, so as to save laborious 3D reconstruction costs and improve visual realism simultaneously. To do this, we newly define a camera transformation between two images from the relationship of the spidery mesh transformation and its corresponding 3D view change. The result animation shows that our method creates a realistic 3D virtual navigation using a simple interface.

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The cholesterol Accumulation decreasing effect of Porpbyra yezoensis extract in kidney of Murine with hypercholesterolemia induced by Triton WR-1339 (Triton WR-1339에 의한 고콜레스테롤증 유발시 해조류 김 추출물의 신장내 콜레스테롤 축적 감소효과)

  • Park, In-Sick;Ahn, Sang-Hyun;Chang, Jae-Man;Kim, Jin-Tack;Kim, Ho-Hyun
    • The Journal of Dong Guk Oriental Medicine
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    • v.7 no.1
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    • pp.43-51
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    • 1998
  • Renal tissues of ICR mouse were intraperitoneally injeced with Porpbyra yezoensis extract(PE) after Triton WR-1339(TX) injection were observed to investigate the cholesterol accumulation decreasing effect of PE. The renal tissues were obtained at hour 24, 48, and 72 after TX injection that were fixed in fromol-calcium solution and were cryocut. The tissue stained by sudan black B for lipid and perchloric acid-naphthoquinone method for cholesterol. The parietal layer of Bowman's capsule is swelled as cuboidal type at hour 48 after TX injection and the lipid blot and cholesterol particle were noticeably increased in glomerulus and these appeared in convoluted tubule, collecting tubule, and Helen's loop. In PE treated group, the lpid blot and cholesterol particle were considerably decreased in glomerulus than TX group. As results indicated that the accumulation of lipid including cholesterol caused by TX injection were mitigated in renal tissues by the antihypercholesterolemia effect of PE.

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An Experiment in Refactoring an Object-Oriented CASE Tool (객체 지향 CASE 도구에 대한 재구조화 실험)

  • Jo, Jang-U;Kim, Tae-Gyun
    • The Transactions of the Korea Information Processing Society
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    • v.6 no.4
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    • pp.932-940
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    • 1999
  • Object-oriented programming is often touted as promoting software reuse. However it is recognized that objected-oriented software often need to be restructured before it can be reused. refactoring is the process that changes the software structure to make it more reusable, easier to maintain and easire to be enhanced wit new functionalities. This paper desirbes experience gained and lessons learned from restructuring OODesigner, a Computer Aided Software Engineering(CASE) tool that supports Objects Modeling Technique(OMT). this tool supports a wide range of features such as constructing object modeler of OMT, managing information repository, documenting class resources, automatical generating C++ and java code, reverse engineering of C++ and Java cod, searching and reusing classes in the corresponding repository and collecting metrics data. although the version 1.x was developed using OMT(i.e the tool has been designed using OMT) and C++, we recognized that the potential maintenance problem originated from the ill-designed class architecture. Thus this version was totally restructured, resulting in a new version that is easier to maintain than the old version. In this paper, we briefly describe its restructuring process, emphasizing the fact that the Refactoring of the tool is conducted using the tool itself. Then we discuss lessons learned from these processes and we exhibit some comparative measurements of the developed version.

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