• Title/Summary/Keyword: data duplication

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A Study on the Industrial Type SFF System using SLS Proecss (SLS 공정을 이용한 산업용 임의형상 제작시스템에 관한 연구)

  • 김동수;임현의;김성종
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.10a
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    • pp.1299-1302
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    • 2004
  • A real object duplication system (RODS), including three dimensional (3D) scanner and solid freeform fabrication system (SFFS), is a device to make three-dimensional objects directly from the drawing or photo data. A Selective Multi-Laser Sintering (SMLS) process designed in this paper is by which computer images received using 3D scanner are built up from polymer powder on building room of large size using dual laser at industrial type SFF system. Using the process can rapidly produce real object duplication components of industrial type such as cylinder, engine block, chassis of automobile, etc. In this paper, the industrial type SFF system using SMLS process is manufactured and the system is satisfied with high precision and high speed processing technique. To research characteristics of each part for theindustrial type SFF system, a structure and thermal analysis and test of each part is carried out. Also, to achievement of high performance for industrial type SFF system, design and fabrication for the structure, heater, nitrogen supply, laser and control part are carried out.

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Development of Digital 3D Real Object Duplication System and Process Technology (디지털 3차원 실물복제기 시스템 및 공정기술 개발)

  • Lee Won-Hee;Ahn Young-Jin;Jang Min-Ho;Choi Kyung-Hyun;Kim Dong-Soo
    • Journal of the Korean Society for Precision Engineering
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    • v.23 no.4 s.181
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    • pp.183-190
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    • 2006
  • Digital 3D Real Object Duplication System (RODS) consists of 3D Scanner and Solid Freeform Fabrication System (SFFS). It is a device to make three-dimensional objects directly from the drawing or the scanning data. In this research, we developed an office type SFFS based on Three Dimensional Printing Process and an industrial SFFS using Dual Laser. An office type SFFS applied sliding mode control with sliding perturbation observer (SMCSPO) algorithm for control of this system. And we measured process variables about droplet diameter measurement and powder bed formation etc. through experiments. In case of industrial type SFFS, in order to develop more elaborate and speedy system for large objects than existing SLS process, this study applies a new Selective Dual-Laser Sintering (SDLS) process and 3-axis Dynamic Focusing Scanner for scanning large area instead of the existing f lens. In this process, the temperature has a great influence on sintering of the polymer. Also the laser parameters are considered like that laser beam power, scan speed, and scan spacing. Now, this study is in progress to evaluate the effect of experimental parameters on the sintering process.

Tail-to-Head Tandem Duplication and Simple Repetitive Sequences of the Cytoplasmic Actin Genes in Greenling Hexagrammos otakii (Teleostei; Scorpaeniformes)

  • Lee, Sang-Yoon;Kim, Dong-Soo;Nam, Yoon-Kwon
    • Fisheries and Aquatic Sciences
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    • v.14 no.4
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    • pp.303-310
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    • 2011
  • We characterized a cytoplasmic actin gene locus in greenling Hexagrammos otakii (Scorpaeniformes). Genomic clones isolated from the greenling DNA library contained two homologous cytoplasmic actin gene copies (HObact2.1 and HObact2.2) in a tail-to-head orientation. Their gene structure is characterized by six translated exons and one non-translated exon. Exon-intron organization and the nucleotide sequences of the two actin gene isoforms are very similar. However, only the HObact2.1 isoform contains microsatellite-like, dinucleotide repeats in the 5'-flanking region (named HOms2002) and intron 1 following the non-translated exon 1 (named HOms769). One microsatellite locus (HOms769) was highly polymorphic while the other (HOms2002) was not. Based on bioinformatic analysis, different transcription factor binding motifs are related to stress and immune responses in the two actin isoforms. Semiquantitative and real-time reverse transcription-PCR assays showed that both isoform transcripts were detectable ubiquitously in all the tissues examined. However, the basal expression levels of each isoform varied across tissues. Overall, the two isoforms showed a similar, but not identical, expression pattern. Our data suggest that the cytoplasmic actin genes may be the result of a recent duplication event in the greenling genome, which has not experienced significant subfunctionalization in their housekeeping roles.

Efficient Complex Event Processing Scheme Considering Similar and Duplication Operations (유사 연산과 중복 연산을 고려한 효율적인 복합 이벤트 처리 기법)

  • Kim, Daeyun;Ko, Geonsik;Kim, Byounghoon;Noh, Yeonwoo;Lim, Jongtae;Bok, Kyoungsoo;Yoo, Jaesoo
    • The Journal of the Korea Contents Association
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    • v.17 no.3
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    • pp.370-381
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    • 2017
  • Recently, a complex event processing system has been introduced to quickly and efficiently process real-time events in various applications. Since the existing complex event processing schemes do not consider the similarity and duplication of operators, they perform a lot of computations and consume memory. To solve such problems, this paper proposes an efficient complex event processing scheme considering similar operators and duplication operations. When the same primitive events have similar operations, the proposed scheme combines them into one virtual operator. For duplicated operations, the proposed scheme processes only one of them first, and then processes the others using the results of the already processed operation when the same operation is subsequently performed. It is shown through performance comparison that the proposed scheme outperforms the existing scheme in terms of the whole operation throughput.

A Study of Acquisition Material Duplication Rate Among Three Academic Libraries for Developing a Library Cooperation System (도서관 정보네트워크 발전을 위한 구입자료 중복율에 대한 조사 연구 - 경기도 소재 3개 대학도서관을 중심으로 -)

  • Kwak, Chul-Wan
    • Journal of the Korean Society for Library and Information Science
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    • v.36 no.4
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    • pp.147-155
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    • 2002
  • The purpose of this study is to identify an acquisition material duplication rate among three academic libraries for developing an academic library network. Three academic libraries located in Gyonggi-do, Korea were selected for data collection. The acquisition lists in both 2000 and 2001 were compared and analyzed between two libraries respectively. The results show that the duplication rate is 0.4% in 2000 and 2.8% in 2001 between medium in libraries, and 1.33%, 1.11% in 2000 and 3.63%, 3.88% in 2001 between a big size library and medium size libraries. These tell us that a big library can get benefit from a library network with medium size libraries.

The Study of the Object Replication Management using Adaptive Duplication Object Algorithm (적응적 중복 객체 알고리즘을 이용한 객체 복제본 관리 연구)

  • 박종선;장용철;오수열
    • Journal of the Korea Society of Computer and Information
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    • v.8 no.1
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    • pp.51-59
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    • 2003
  • It is effective to be located in the double nodes in the distributed object replication systems, then object which nodes share is the same contents. The nodes store an access information on their local cache as it access to the system. and then the nodes fetch and use it, when it needed. But with time the coherence Problems will happen because a data carl be updated by other nodes. So keeping the coherence of the system we need a mechanism that we managed the to improve to improve the performance and availability of the system effectively. In this paper to keep coherence in the shared memory condition, we can set the limited parallel performance without the additional cost except the coherence cost using it to keep the object at the proposed adaptive duplication object(ADO) algorithms. Also to minimize the coherence maintenance cost which is the bi99est overhead in the duplication method, we must manage the object effectively for the number of replication and location of the object replica which is the most important points, and then it determines the cos. And that we must study the adaptive duplication object management mechanism which will improve the entire run time.

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Healthcare Data Supervision and Secrecy in Cloud Computing

  • Hossain, Al Amin;Islam, Md. Motaharul;Aazam, Mohammad;Lee, Seung-Jin;Huh, Eui-Nam
    • Proceedings of the Korea Information Processing Society Conference
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    • 2013.05a
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    • pp.695-697
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    • 2013
  • Medical data sharing is increasing due to treatment duplication which increases the cost of medication. Medical healthcare system has been improved to combine with cloud computing. It reduces treatment delay and the medical data error. However, the concern about the privacy protection of medical information is also significant. Medical information is more sensitive than other information because involuntary disclosure can affect in both personal and social life. Privacy cloud brokerage has conquered great attention for solving these problems. Our method provides a security model in the cloud computing environment that facilitates the exchange of medical records between assigned custodians. It allows doctors to obtain a complete patient medical records which can help to avoid duplication, reduce the medical error and healthcare cost as well. In addition, our method offers a trustworthy solution against the privacy violence.

Secure Certificates Duplication Method Among Multiple Devices Based on BLE and TCP (BLE 및 TCP 기반 다중 디바이스 간 안전한 인증서 복사 방법)

  • Jo, Sung-Hwan;Han, Gi-Tae
    • KIPS Transactions on Computer and Communication Systems
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    • v.7 no.2
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    • pp.49-58
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    • 2018
  • A certificate is a means to certify users by conducting the identification of the users, the prevention of forgery and alteration, and non-repudiation. Most people use an accredited certificate when they perform a task using online banking, and it is often used for the purpose of proving one's identity in issuing various certificates and making electronic payments in addition to online banking. At this time, the issued certificate exists in a file form on the disk, and it is possible to use the certificate issued in an existing device in a new device only if one copies it from the existing device. However, most certificate duplication methods are a method of duplication, entering an 8-16 digit verification code. This is inconvenient because one should enter the verification code and has a weakness that it is vulnerable to security issues. To solve this weakness, this study proposes a method for enhancing security certificate duplication in a multi-channel using TCP and BLE. The proposed method: 1) shares data can be mutually authenticated, using BLE Advertising data; and 2) encrypts the certificate with a symmetric key algorithm and delivers it after the certification of the device through an ECC-based electronic signature algorithm. As a result of the implementation of the proposed method in a mobile environment, it could defend against sniffing attacks, the area of security vulnerabilities in the existing methods and it was proven that it could increase security strength about $10^{41}$ times in an attempt of decoding through the method of substitution of brute force attack existing method.

Paper Duplication Method Supported by Task (태스크 기반 이중화 방안)

  • Lee, Jong-Chan;Park, Sang-Joon;Kang, Kwon-Il
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.27 no.1C
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    • pp.103-111
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    • 2002
  • In RNC of IMT-2000, main control processors such as ASP, ACP and OMP are responsible for call control function, and the high reliability and real-time property should be provided for it. So, the study of real-time fault-tolerant for it is needed. In this paper, we proposes an Task based duplication method, in which Tasks in active side operated on message unit and send the updated data to standby side after operation, log in the message to standby side for recovery during take-over. This scheme decreases the dual down and the complexity of synchronization procedure, and performs the synchronization more exactly because Tasks control the synchronization of system. This paper also proposes the fault detection and the fault handing method for effective implementation of Task based duplication. This scheme focus on increasing the fault detection rate and intercepting originally that fault data is send to standby side.

Retrospective Drug Utilization Review Study on the Therapeutic Duplication in Patients with Anxiety Disorders (불안장애 환자에서의 치료약제 중복사용에 대한 후향적 의약품사용평가 연구)

  • Park, Chan-Hyun;Sohn, Hyun-Soon;Shin, Hyun-Taek;Choi, Kyung-Eob
    • Korean Journal of Clinical Pharmacy
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    • v.20 no.1
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    • pp.39-49
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    • 2010
  • The present study was aimed to examine the occurrence and influencing factors therapeutic duplication (TD) of medications for anxiety disorders by analyzing the relevant prescription data. In this study, the prescription data issued on March 19, 2008 in domestic medical institutes were utilized. TD was defined as more than two medications under the same therapeutic classification per prescription based on the Anatomical Therapeutic Classification (ATC) code. The assessment of TD was performed based on the number of cases and on the ratio determined. To identify the influencing factor of TD, the variables related to the differences in the TD ratio were analyzed based on the results of the Chi-Square test conducted with the variables; patients, medical institutes, diseases, and treatments. The number and ratio of TD were determined to be 1,333 out of the total of 19,219 anxiety disorder cases, and 6.94%, most cases involving benzodiazepine derivatives, respectively. The TD ratio was found to be higher in relation to males than to females. Patients with national health insurance benefits have a higher TD ratio compared to the medical-aid beneficiaries. The TD ratios were highest in clinics, psychiatry divisions, and Gyeongsang district. The TD ratio of the cases with more than two anxiety disorders was found to be higher than that of the cases with only one anxiety disorder. As the number of medications per prescription increased, the TD ratio was shown to have become gradually higher. In conclusion, in order to prevent TD, the concurrent DUR system should be implemented. The prescribers and pharmacists must be educated regarding duplicated medications to promote the safe and effective use of medicines, without unnecessary TD.