• Title/Summary/Keyword: Digital Recording

Search Result 324, Processing Time 0.024 seconds

Study on Strain Measurement of Agricultural Machine Elements Using Microcomputer (Microcomputer를 이용(利用)한 농업기계요소(農業機械要素)의 Strain 측정(測定)에 관(關)한 연구(硏究))

  • Kim, Kee Dae;Kim, Tae Kyun;Kim, Soung Rai
    • Korean Journal of Agricultural Science
    • /
    • v.8 no.1
    • /
    • pp.90-96
    • /
    • 1981
  • To design more efficient agricultural machinery, the accurately measuring system among many other factors is essential. A light-beam oscillographic recorder is generally used in measuring dynamic strain but it is not compatible with the extremely high speed measuring system such as 1,000 m/s, also is susceptable to damage due to vibration while using the system in field. The recorder used light sensitive paper for strip chart recording. The reading and analysis of data from the strip charts is very cumbersome, errorneous and time consuming. A microcomputer was interfaced with A/D converter, microcomputer program was developed for measuring, system calibration was done and the strain generated from a cantilever beam vibrator was measured. The results are summarized as follows. 1. Microcomputer program was developed to perform strain measuring of agricultural machine elements and could be controled freely the measuring intervals, no. of channels and no. of data. The maximum measuring speed was $62{\mu}s$. 2. Calibration the system was performed with triangle wave generated from a function generator and checked by an oscilloscope. The sampled data were processed using HP 3000 minicomputer of Chungnam National University computer center the graphical results were triangle same as input wave and so the system have been out of phase distorsion and amplitude distorsion. 3. The strain generated from a cantilever beam vibrator which has free vibration period of 0.019 second were measured by the system controlled to have l.0 ms of time interval and its computer output showing vibration curve which is well filted to theoretical value. 4. Using microcomputer on measuring the strain of agricultural machine elements could not only save analyzing time and recording papers but also get excellent adaptation to field experiment, especially in measurement requiring high speed and good precision.

  • PDF

A Study on the Model of Appraisal and Acquisition for Digital Documentary Heritage : Focused on 'Whole-of-Society Approach' in Canada (디지털기록유산 평가·수집 모형에 대한 연구 캐나다 'Whole-of-Society 접근법'을 중심으로)

  • Pak, Ji-Ae;Yim, Jin Hee
    • The Korean Journal of Archival Studies
    • /
    • no.44
    • /
    • pp.51-99
    • /
    • 2015
  • The purpose of the archival appraisal has gradually changed from the selection of records to the documentation of the society. In particular, the qualitative and quantitative developments of the current digital technology and web have become the driving force that enables semantic acquisition, rather than physical one. Under these circumstances, the concept of 'documentary heritage' has been re-established internationally, led by UNESCO. Library and Archives Canada (LAC) reflects this trend. LAC has been trying to develop a new appraisal model and an acquisition model at the same time to revive the spirit of total archives, which is the 'Whole-of-society approach'. Features of this approach can be summarized in three main points. First, it is for documentary heritage and the acquisition refers to semantic acquisition, not the physical one. And because the object of management is documentary heritage, the cooperation between documentary heritage institutions has to be a prerequisite condition. Lastly, it cannot only documenting what already happened, it can documenting what is happening in the current society. 'Whole-of-society approach', as an appraisal method, is a way to identify social components based on social theories. The approach, as an acquisition method, is targeting digital recording, which includes 'digitized' heritage and 'born-digital' heritage. And it makes possible to the semantic acquisition of documentary heritage based on the data linking by mapping identified social components as metadata component and establishing them into linked open data. This study pointed out that it is hard to realize documentation of the society based on domestic appraisal system since the purpose is limited to selection. To overcome this limitation, we suggest a guideline applied with 'Whole-of-society approach'.

Development of a Data-logger Classifying Dangerous Drive Behaviors (위험 운전 유형 분류 및 데이터 로거 개발)

  • Oh, Ju-Taek;Cho, Jun-Hee;Lee, Sang-Yong;Kim, Young-Sam
    • The Journal of The Korea Institute of Intelligent Transport Systems
    • /
    • v.7 no.3
    • /
    • pp.15-28
    • /
    • 2008
  • According to the accident statistics published by the National Police Agency in 2006, it can be recognized that drivers' characteristics and driving behaviors are the most causational factors on the traffic accidents. At present, although many recording tools such as digital speedometer or black box are distributed in the market to meet social requests of decreasing traffic accidents and increasing safe driving behaviors, it is also true that it still lacks in obvious categories for dangerous driving types and then, the efficiency of the categories to be studied has been low. In this study, dangerous driving types are redefined. They are grouped into 7 classifications in the first level, and the seven classifications are regrouped into 16 in more detail. To verify the redefined dangerous driving types, a Data-logger is developed to receive and analyze the data that occur from the driving behaviors of the test vehicle. The developed Data-logger can be used to construct a real time warning system and safe driving management system with dangerous driving patterns based on acceleration, deceleration, Yaw rate, image data, etc.

  • PDF

Development System of Mimicking Image Classification for Newspaper Advertisements Database Construction (신문광고영상 데이터베이스구축을 위한 유사영상 분류 시스템)

  • Kim, Ki-Hyun;Kim, Kwang-Tae;Park, Hyun-Woo;Lee, Dong-Hoon;Yun, Tae-Soo
    • 한국HCI학회:학술대회논문집
    • /
    • 2008.02a
    • /
    • pp.766-771
    • /
    • 2008
  • In this paper, we propose a system of mimicking image classification for building database system. It better manages the format which recording the same advertisements multimedia in advertisements image. Recently, the work of converting database is made directly by the people. This work doses the media scanning, image editing and saving, and saving of advertising information (date, the media, the page and size, so far). Therefore, it is wasted a lot of time and manpower as inefficient business. To solve these problems, first of all we gain an image by digital camera, extract and classify candidate area of advertisements. Accordingly, our system saves database to comparison of the mimicking of all advertising and classify whether area of image is the new or existing advertising.

  • PDF

A Study on the Roles of Library in the Era of K-MOOC (K-MOOC 시대 도서관의 역할에 관한 연구)

  • Moon, Bang-Hee
    • Journal of Korean Library and Information Science Society
    • /
    • v.49 no.1
    • /
    • pp.193-214
    • /
    • 2018
  • This study aimed to exploratorily investigate the new roles of libraries in the era of K-MOOC. For this, potential roles were derived and categorized from former researches and practices. And to evaluate the appropriacy of those roles, two expert surveys were conducted. Panel A was comprised of 30 professors who had been running K-MOOC classes and Panel B was comprised of 30 librarians of Universities that had adopted K-MOOC. The result shows that they both agree about distinct roles of library as information provider such as licensing and providing digital contents requested from information users, while technological part, for example, recording video and audio, managing website, and providing open access, was considered inappropriate because those roles were already taken by CTLs. Also, professors agree that information literacy education is required for teachers not just for students as the speed of technological development is too swift and librarians agree that they have to equipped with core competence in preparation for upcoming change by creating added value, establishing closer relationship with various educational and technological institutes, and securing organizational flexibility.

Usage of informed consent form for Bee-venom pharmacopuncture Therapy at korean medicine hospitals and Proposal for development of a standard informed consent form. (한방병원의 봉약침 시술 동의서의 사용 현황과 표준 시술 동의서 개발에 대한 제안)

  • Kim, Minjeong
    • The Journal of Korean Medicine
    • /
    • v.41 no.3
    • /
    • pp.66-80
    • /
    • 2020
  • Objectives: We investigated the current status of the consent form for bee-venom pharmacopuncture therapy, which is using in Korean medicine hospitals. We suggest the development of a standard informed consent form. Method: Through the questionnaire survey, status of using informed consent form was identified at 24 Korean medicine hospitals. We analyze different types of informed consent form, which was developed by each hospitals. We investigated the types of informed consent forms for various medical procedures through electronic searches. A standard informed consent form for bee-venom pharmacopuncture therapy was developed based on the medical law and the standard informed consent form for medical procedures developed by Korea Fair Trade Mediation Agency. Result: In our survey, 65% of the hospitals do not use consent well, only 35% of the hospitals use informed consent form, and the most hospitals use self-developed informed consent form. As a result of analyzing the contents of informed consent form used in each hospitals, the explanation of diagnosis, treatment precautions, suggestions for other treatments, consequences of not performing the scheduled procedure, possibility of treatment change was insufficient. 48% of hospitals manage consent in recording on a chart, 39% in scanned documents, and 13% in digital electronic consent form. Conclusion: A standard informed consent form for Bee-venom pharmacopuncture therapy include diagnosis, effectivness, necessity, indications, method, skin reaction test, hypersensitivity questionnaire, treatment precautions, possible hypersensitivity reactions and countermeasures, suggestions for other treatments, consequences of not performing the scheduled procedure, possibility of treatment change and the name of doctor.

A Study on the Aquisition and Use of Videorecordings in Digital Age - concerning for the public libraries in Pusan - (디지털 시대의 비디오자료 수집과 이용에 관한 연구 -부산지역 공공도서관을 중심으로-)

  • Kim Young-Kyu
    • Journal of Korean Library and Information Science Society
    • /
    • v.30 no.2
    • /
    • pp.199-233
    • /
    • 1999
  • The purpose of this study is to activate the videorecordings in public libraries. The method of activation is to analysis of data which collected through questionnaire from respondent libraries. The results of the study are as follows : 1. The budget of videorecordings is absolutely short. 2 The acquisition policy of videorecordings is not planned because of short budget and little standard selection tool. 3. Most of public libraries wanted to exchange and use of videorecordings through interlibrary loan. 4. The subject of collected videorecordings was almost oriented to the education and motion pictures. 5. Specialized collection policy of public libraries in Pusan is not considered in videorecordings selection. 6. 87 percent of public libraries are not circulate videorecordings to the end-user. 7. Group watching planning of videorecordings in public libraries was done by monthly. 8. 70 percent of public libraries was not perform user reaction survey after watching. 9. 13 percent of public libraries has done the video tape recording of TV programming. 10. Most of public libraries had not a video to introduce themselves and user also had not a plan to create a video. 11. Most of public libraries recognized the copyright law but they wanted to reproduct the videorecordings for user with permission of authors.

  • PDF

System Design and Implementation for New Move Picture Solution EZ-MOV Using FLV (FLV를 이용한 새로운 동명상 솔루션 EZ-MOV 대한 시스템 설계 및 구현)

  • Kwon, O-Byoung;Shin, Hyun-Cheul
    • Convergence Security Journal
    • /
    • v.9 no.2
    • /
    • pp.79-84
    • /
    • 2009
  • Recently, Move Picture Files have the same file format and a compression technique as Window Media Video form. but Moving Pictures using file format and a compression technique have question about Motion blur and compressibility. In this paper, we design and Implement for new Move Picture Solution EZ-MOV using FLV different from developed FLV(Flash Video) in the Macromedia company. EZ-MOV have advantages as follow. first, FLV player is able to compact disk access time and DRM (Digital Rights Management) with a built-in self and unable to an illegal video recording, second, whenever WMV formal file encoded FLV are able to lossless compression to fifty percent, third, FLV is able to Moving Picture streaming no buffering. fourth, FLV file is able streaming service no streaming server. fifth, FLV file is able to streaming service keep pace with download and streaming. sixth, FLV file is able to full duplex service.

  • PDF

Automation of Aerial Triangulation by Auto Dectection of Pass Points (접합점 자동선정에 의한 항공삼각측량의 자동화)

  • Yeu, Bock-Mo;Kim, Won-Dae
    • Journal of Korean Society for Geospatial Information Science
    • /
    • v.7 no.2 s.14
    • /
    • pp.47-56
    • /
    • 1999
  • In this study, tie point observation in aerial triangulation was automated by the image processing methods. The technique includes boundary extraction and We matching processes. The procedures were applied to extract points of Interest and to find their conjugate points in the other images. The image coordinates of the identified points were then used to compute their absolute coordinates. An algorithm was developed in this study for the automation of observation in aerial triangulation, which is a manual process of selecting a tie point and recording the image coordinate of the selected point. The developed algorithm automates this process through the application of a mathematical operator to extract points of interest from an arbitrary image. The root m square error of image coordinates of the developed algorithm is $6.8{\mu}m$, which is close to that of the present analytical method. In a manual environment, the accuracy of the result of a photogrammetric process is heavily dependant on the level of skill and experience of the human operator. No such problem exists in an automated system. Also, as a result of the automated system, the time spent in the observation process could be reduced by a factor of 61.2%, thereby reducing the overall cost.

  • PDF

Growth and Decay of Alpha Tracks in a Large Scale Cloud Chamber after Injection of Radon

  • Wada, Shinichi;Kobayashi, Tsuneo;Katayama, Yoshiro;Iwami, Toshiaki;Kato, Tsuguhisa;Cameron, John R.
    • Proceedings of the Korean Society of Medical Physics Conference
    • /
    • 2002.09a
    • /
    • pp.275-278
    • /
    • 2002
  • The recognition of the natural background radiation is important not only for radiological education but also for the promotion of people's scientific view about radiation. We made a "room" on the web showing natural background radiation as part of a VRM (Virtual Radiation Museum). The "room" shows the video images of the tracks of charged particles from natural background radiation, alpha and beta ray track from known sources using a Large Scale Diffusion Cloud Chamber. The purpose of this study is to make clear the origin of a kind of track (named A-track) which is thick and easy to recognize with the length less than several cm in the cloud chamber, and to make numerical explanation of its counting rate. The study was carried out using a Large Scale Diffusion Cloud Chamber (Phywe, Germany) installed in the Niigata Science Museum. The Model RNC (Pylon Electronics, Canada) was used as Rn-222 source. Ra-226 activity in RNC was 111.6 Bq calibrated with NIST protocol. Rn-222 gas was injected into the cloud chamber. Continuous video recording with use of Digital Handycam (SONY, Japan) was carried out for 360 min. after injection of Rn-222 gas. The number of alpha-ray track (alpha track) in the video images was analyzed. The growth and decay curve of the total activity of Rn-222 and its alpha emitting progeny were calculated and compared with the count of the alpha tracks. As a result the alpha tracks formed by Rn-222 injection resemble A-Tracks. The relationship between A-track in the cloud chamber and atmospheric Rn is discussed.

  • PDF