• Title/Summary/Keyword: Kernel Size

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Digital Image Processing of Side Scan Sonar for Underwater Man-made Structure (수중 인공구조물에 대한 사이드스캔소나 탐사자료의 영상처리)

  • Shin, Sung-Ryul;Lim, Min-Hyuk;Kim, Kwang-Eun
    • Journal of Advanced Marine Engineering and Technology
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    • v.33 no.2
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    • pp.344-354
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    • 2009
  • Side scan sonar using acoustic wave plays a very important role in the underwater, sea floor, and shallow marine geologic survey. In this study, we have acquired side scan sonar data for the underwater man-made structures, artificial reefs and fishing grounds, installed and distributed in the survey area. We applied digital image processing techniques to side scan sonar data in order to improve and enhance an image quality. We carried out digital image processing with various kinds of filtering in spatial domain and frequency domain. We tested filtering parameters such as kernel size, differential operator, and statistical value. We could easily estimate the conditions, distribution and environment of artificial structures through the interpretation of side scan sonar.

Water uptake rate of brown rice at $100^{\circ}C$ ($100^{\circ}C$에서의 현미의 수분 흡수 속도)

  • Kim, Sung-Kon;Suh, Chung-Sik
    • Applied Biological Chemistry
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    • v.33 no.3
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    • pp.261-263
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    • 1990
  • The water uptake rates of thirty-four japonica and twenty-five j x indica brown rices at $100^{\circ}C$ were analyzed. The water uptake rates had no correlation with size or volume of brown rice kernel. The regression equations for water uptake rates between brown rice at $100^{\circ}C$(Y) and milled rice at $23^{\circ}C(X)$ for japonica and j x indica varieties were Y = 1.12X-0.34(r = 0.976, p<0.001) and Y = 1.16X-0.54(r = 0.990, p<0.001), respectively (Received August 13, 1990 and accepted September 20,1990).

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Current Status and Prospect of Quality Evaluation in Upland Crop (전작물 품질평가 현황과 전망)

  • Kim Yong-Ho;Lee Choon-Ki;Kim Sun-Lim;Jeong Byeong-Choon;Kim Sung-Yeul
    • Proceedings of the Korean Society of Crop Science Conference
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    • 2002.05a
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    • pp.58-62
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    • 2002
  • The standard of crop quality is required to promote the consumption and produce the high quality products. It will contribute the stability for processing products and the marketability of crops. Upland crop quality is considered to the three categories; the marketing value such as grain size, shape and appearance; the eating and processing value such as milling rate, dehulled ratio and kernel hardness; the nutritional value such as protein, lipid and isoflavone content. Even though many characters were analyzed for crop quality, effective method of evaluation to enhance the control of quality was not performed till now. Therefore, in the future, research in upland crop quality should emphasize to establish the standard evaluation method.

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ServerNet and ATM Interconnects: Comparison for Compressed Video Transmission

  • Ashfaq Hossain;Kang, Sung-Mo;Robert Horst
    • Journal of Communications and Networks
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    • v.1 no.2
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    • pp.134-142
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    • 1999
  • We have developed fully functional Video Server and Client applications which can transmit, receive, decompress and display compressed video over various networks. Our video trans-port allows dynamic rate control feedback, loss detection, and repair requests from Clients to the Server. Our experiments show how feedvack-before-degradation scheme for rate adaptation maintains good display frame-rate for video playback. We show how the playback degradation(reduction in display frame-rate) oc-curs and what happens if corrective measures are not taken to im-prove the situation. The degradation is attributed to the increased internal kernel buffering which consumes scarce CPU resources. We demontrate with our experimental results that ServerNet, with improved hardware delivery guarantees, can significantly reduce host CPU resource consumption while serving video streams. We present the maximum number of streams which can be served for each of ATM and ServerNet interconnects. The appropriate user-level packet size for the video server are also determined for each case.

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A FRACTIONAL-ORDER TUMOR GROWTH INHIBITION MODEL IN PKPD

  • Byun, Jong Hyuk;Jung, Il Hyo
    • East Asian mathematical journal
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    • v.36 no.1
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    • pp.81-90
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    • 2020
  • Many compartment models assume a kinetically homogeneous amount of materials that have well-stirred compartments. However, based on observations from such processes, they have been heuristically fitted by exponential or gamma distributions even though biological media are inhomogeneous in real environments. Fractional differential equations using a specific kernel in Pharmacokinetic/Pharmacodynamic (PKPD) model are recently introduced to account for abnormal drug disposition. We discuss a tumor growth inhibition (TGI) model using fractional-order derivative from it. This represents a tumor growth delay by cytotoxic agents and additionally show variations in the equilibrium points by the change of fractional order. The result indicates that the equilibrium depends on the tumor size as well as a change of the fractional order. We find that the smaller the fractional order, the smaller the equilibrium value. However, a difference of them is the number of concavities and this indicates that TGI over time profile for fitting or prediction should be determined properly either fractional order or tumor sizes according to the number of concavities shown in experimental data.

Scale Invariant Target Detection using the Laplacian Scale-Space with Adaptive Threshold (라플라스 스케일스페이스 이론과 적응 문턱치를 이용한 크기 불변 표적 탐지 기법)

  • Kim, Sung-Ho;Yang, Yu-Kyung
    • Journal of the Korea Institute of Military Science and Technology
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    • v.11 no.1
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    • pp.66-74
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    • 2008
  • This paper presents a new small target detection method using scale invariant feature. Detecting small targets whose sizes are varying is very important to automatic target detection. Scale invariant feature using the Laplacian scale-space can detect different sizes of targets robustly compared to the conventional spatial filtering methods with fixed kernel size. Additionally, scale-reflected adaptive thresholding can reduce many false alarms. Experimental results with real IR images show the robustness of the proposed target detection in real world.

A Design of the Remote Test Tool for Software Based on VxWorks (VxWorks 기반 소프트웨어를 위한 원격 테스트 도구의 설계)

  • Park, Song-Hwa;Lee, Hyung-Soo
    • IEMEK Journal of Embedded Systems and Applications
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    • v.7 no.3
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    • pp.135-142
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    • 2012
  • The Quality of embedded system depends on the embedded software. As the complexity and the size of embedded software have been increasing, it is more likely that the software may include faults, and the reliability and stability issues are getting more important. In this paper, we propose a remote test tool for software based on VxWorks by using fault injection method. The test tool consists of test server and test client for testing on the cross development environment. The test server operates in the host system and user can not only test but also monitor the software by using it. The test client operates in the target system and it controls kernel objects and sends the input data into the software when receiving the control and data from the test server. We developed the prototype software and demonstrated the ability of testing software robustness by injecting faults.

The growth of zinc oxide particles by coagulation in aerosol reactor (에어로졸 반응기에서 산화아연 입자의 응집 성장)

  • Lee, Jong Ho;Song, Shin Ae;Park, Seung Bin
    • Particle and aerosol research
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    • v.4 no.2
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    • pp.69-75
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    • 2008
  • Nanosize ZnO particles were prepared by oxidation of zinc vapor and the particle growth was modeled by a coagulation model by assuming that the characteristic time for reaction was much shorter than coagulation time and residence time (${\tau}_{reaction}{\ll}{\tau}_{coagulation}{\ll}{\tau}_{residence}$). Experimental measurement of zinc oxide particles diameter was consistent with the predicted result from the coagulation model. For practical purpose of predicting zinc oxide size in areosol reactor, the constant kernel solution is concluded to be sufficient, Uniqueness of nano-scale property of zinc oxide was confirmed by the higher photocatalytic activity of zinc oxide than nanosize titania particles.

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Design of Lightweight CAD Files with Dimensional Verification Capability for Web-Based Collaboration (웹기반 협업을 위한 치수검증이 가능한 경량캐드파일 설계)

  • Song In-Ho;Chung Sung-Chong
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.30 no.5 s.248
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    • pp.488-495
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    • 2006
  • The demand for the use of 3D CAD data over the Internet environment has been increased. However, transmission of 3D CAD data has delayed the communication effectiveness because of the CAD data size. Lightweight CAD file design methodology is required for rapid transmission in the distributed environment. In this paper, to derive lightweight CAD files from commercial CAD systems, a file translation system producing a native file is constructed first by using the InterOp and API of the ACIS kernel. Using the B-rep model and mesh data extracted from the native file, the lightweight CAD file with topological information is constructed as a binary file. Since the lightweight CAD file retains topological information, it is applied to the dimensional verification, digital mock-ups and visualization of CAD files. Effectiveness of the proposed lightweight CAD file is confirmed through various case studies.

Development of Easy-to-use VI Programming Library (사용자 편의성을 고려한 VIA 라이브러리 개발에 관한 연구)

  • 이상기;이윤영;서대화
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.27 no.4C
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    • pp.326-332
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    • 2002
  • To transfer the large size of data more quickly among cluster nodes, the lightweight messaging scheme has been developed. VIA(Virtual Interface Architecture) allows that user can directly communicate with network devices without any interference of kernel and has become a communication protocol for clusters. But one must spend a lot of time to be skillful with it because of difficulties of programming. Therefore, we propose an easier library called EVIL(Easy-to-use Virtual Interface Library) that developers can easily deal with. We evaluated the performance of EVIL, Native VIA, TCP/IP respectively.