• Title, Summary, Keyword: registration

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Performance Analysis of location Registration Methods : Zone-based Registration and Distance-based Registration (위치등록 방법의 성능분석 : 영역기준 위치등록과 거리기준 위치등록)

  • Baek, Jang-Hyun;Lie, Chang-Hoon
    • Journal of Korean Institute of Industrial Engineers
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    • v.23 no.2
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    • pp.385-401
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    • 1997
  • In this paper, we evaluate the performance of zone-based registration and distance-based registration. First, we propose the mobility model which can be used to analyze the performance of both zone-based registration and distance-based registration. And using the proposed mobility model, we obtain several performance measures and perform numerical computation to compare the performance of two registration methods. Numerical results show that in general zone-based registration needs less number of registration than distance-based registration. On the other hand, if distance-based registration is used, registration load is equally distributed to all cells in a location area and ping-pong phenomenon is not occurred. And when a VLR area is composed of a few location areas, distance-based registration may need less registration load than zone-based registration. Therefore, a proper registration method should be selected considering system circumstances and implementation complexity, and the selected method should be implemented so as to change system parameters according to system circumstances.

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Performance Analysis of Location Registration Scheme in Mobile Communication Networks (이동통신망에서의 위치등록 방법의 성능분석)

  • 임석구
    • Proceedings of the Korea Contents Association Conference
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    • pp.449-453
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    • 2003
  • In this paper, we evaluate the performance of zone-based registration, distance-based registration and distance-based registration considering call arrival. We propose the mobility model, which can be used to analyze the performance of three registration schemes. Numerical results show that zone-based registration needs less number of registration than distance-based registration. On the other hand, the registration load of the distance-based registration is equally distributed to all cells in a location area. However, the registration load of the distance-based registration considering call arrival is similar to that of zone-based registration and equally distributed to all cells in a location am Therefore, the proposed scheme can be effectively used restricted radio resources.

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Multimodality and Non-rigid Registration of MRI' Brain Image

  • Li, Binglu;Kim, YoungSeop
    • Journal of the Semiconductor & Display Technology
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    • v.18 no.1
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    • pp.102-104
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    • 2019
  • Registering different kinds of clinical images widely used in diagnostic and surgery planning. However, cause of tumor growth or effected by gravity, human tissue has plenty of non-rigid deformation with clinically. Non-rigid registration allows the mapping of straight lines to curves. Therefore, such local deformation makes registration more complicated. In this work, we mainly introduce intra-subject, inter-modality registration. This paper mainly studies the nonlinear registration method of 2D medical image registration. The general medical image registration algorithm requires manual intervention, and cost long registration time. In our work to reduce the registration time in rough registration step, the barycenter and the direction of main axis of the image is calculated, which reduces the calculation amount compared with the method of using mutual information.

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Temozolomide Salvage Chemotherapy for Recurrent Anaplastic Oligodendroglioma and Oligo-Astrocytoma

  • Gwak, Ho-Shin;Yee, Gi Taek;Park, Chul-Kee;Kim, Jin Wook;Hong, Yong-Kil;Kang, Seok-Gu;Kim, Jeong Hoon;Seol, Ho Jun;Jung, Tae-Young;Chang, Jong Hee;Yoo, Heon;Hwang, Jeong-Hyun;Kim, Se-Hyuk;Park, Bong Jin;Hwang, Sun-Chul;Kim, Min Su;Kim, Seon-Hwan;Kim, Eun-Young;Kim, Ealmaan;Kim, Hae Yu;Ko, Young-Cho;Yun, Hwan Jung;Youn, Ji Hye;Kim, Juyoung;Lee, Byeongil;Lee, Seung Hoon
    • Journal of Korean Neurosurgical Society
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    • v.54 no.6
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    • pp.489-495
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    • 2013
  • Objective : To evaluate the efficacy of temozolomide (TMZ) chemotherapy for recurrent anaplastic oligodendroglioma (AO) and anaplastic oligoastrocytoma (AOA). Methods : A multi-center retrospective trial enrolled seventy-two patients with histologically proven AO/AOA who underwent TMZ chemotherapy for their recurrent tumors from 2006 to 2010. TMZ was administered orally (150 to 200 $mg/m^2/day$) for 5 days per 28 days until unacceptable toxicity occurred or tumor progression was observed. Results : TMZ chemotherapy cycles administered was median 5.3 (range, 1-41). The objective response rate was 24% including 8 cases (11%) of complete response and another 23 patients (32%) were remained as stable disease. Severe side effects (${\geq}$grade 3) occurred only in 9 patients (13%). Progression-free survival (PFS) of all patients was a median 8.0 months (95% confidence interval, 6.0-10.0). The time to recurrence of a year or after was a favorable prognostic factor for PFS (p<0.05). Overall survival (OS) was apparently differed by the patient's histology, as AOA patients survived a median OS of 18.0 months while AO patients did not reach median OS at median follow-up of 11.5 months (range 2.7-65 months). Good performance status of Eastern Cooperative Oncology Group 0 and 1 showed prolonged OS (p<0.01). Conclusion : For recurrent AO/AOA after surgery followed by radiation therapy, TMZ could be recommended as a salvage therapy at the estimated efficacy equal to procarbazine, lomustine, and vincristine (PCV) chemotherapy at first relapse. For patients previously treated with PCV, TMZ is a favorable therapeutic option as 2nd line salvage chemotherapy with an acceptable toxicity rate.

Problem and Improvement of the Computerization Practice Real - estate Registration

  • Youn, Sung-Ho;Kim, Moon-sung
    • Journal of the Korea Society of Computer and Information
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    • v.21 no.1
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    • pp.161-168
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    • 2016
  • It has become the information medium that mediate between individuals of marketing with the new information media that use of the Internet in accordance with the progress of the IT industry- real estate marketing, real estate leasing, real estate auctions, etc. The real estate registration services should be disclosed to outside that include a schedule details the public book-register and problems caused by it should be reasonably resolved by handling a large amount of real estate registration work quickly, accurately handling to utilize Information Technology(IT) through the information system construction as the feature to process the information of register entries. Computerization of real estate registration will raise the efficiency of the registration as well as people can see the information related to real estate on the basis of published content without limitation the time and place and will pursue the ideal and reliability of the registration -web accessibility improving of the Internet Registry and permanent storage of preserving documents by electronic means. It is very large that impact on the real estate transaction if the accuracy of legal registration choosing formalism in the processing of real estate registration business through the Internet than written application is highly probable to occur incorrect registration. Also, It is necessary to manage it effectively -if you do not quickly and exactly respond to it, there is problems such as delays or poor registration service because real estate business activated and real estate registration services also increased sharply. In this paper, we will identify the problems of the real estate registration work and suggest improvements about it.

Deformable Registration for MRI Medical Image

  • Li, Binglu;Kim, YoungSeop;Lee, Yong-Hwan
    • Journal of the Semiconductor & Display Technology
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    • v.18 no.2
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    • pp.63-66
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    • 2019
  • Due to the development of medical imaging technology, different imaging technologies provide a large amount of effective information. However, different imaging method caused the limitations of information integrity by using single type of image. Combining different image together so that doctor can obtain the information from medical image comprehensively. Image registration algorithm based on mutual information has become one of the hotspots in the field of image registration with its high registration accuracy and wide applicability. Because the information theory-based registration technology is not dependent on the gray value difference of the image, and it is very suitable for multimodal medical image registration. However, the method based on mutual information has a robustness problem. The essential reason is that the mutual information itself is not have enough information between the pixel pairs, so that the mutual information is unstable during the registration process. A large number of local extreme values are generated, which finally cause mismatch. In order to overcome the shortages of mutual information registration method, this paper proposes a registration method combined with image spatial structure information and mutual information.

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Performance analysis in location registration schemes in CMS considering mobile power status (이동국의 전원상태를 고려한 CMS 위치등록방식 성능분석)

  • 김광식;조경록
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.21 no.9
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    • pp.2402-2414
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    • 1996
  • Registration is the process by which a base station gets the information of location and status about mobile stations. Registration will become an increasingly important issue in mobile cellular communications, especially in microcellular system with the increase of location updating traffic. Four typesof registration schemes, which are specified in US standard IS-95 and Korean standard TTA-KO-0062, power up registration scheme, power down registration scheme, distance based registration scheme and zone based registration scheme, will be mainly used in the future. In this paper, we derive the combined cost of signaling traffic of paging and registration for various parameters of mobile stations behavior(unencumbered call duration, power up and down rate, velocity, etc.) then we present numerical results for the perfroamnce of four registration schemes. The size of location area is provided for optimal operation.

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Development of Fixture for Reducing Errors in Registration of 3D Laser Measuring System (Registration 오차감소를 위한 3차원 비접촉식 측정용 Fixture 개발)

  • Kim Yeun Sul;Jin Young Ju;Lee Hi Koan;Yang Gyun Eui
    • Journal of the Korean Society for Precision Engineering
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    • v.22 no.10
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    • pp.107-113
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    • 2005
  • This paper presents a method to reduce errors in registration, which is used in transformation coordinate system of the multiple measuring data. In general, the ICP algorithms and feature-based approaches are used for registration. In order to measure wrap-around object, it is necessary to change the scanning direction or set-up of the object. A fixture is made to reduce registration errors caused by inaccurate center point of tooling balls, providing the more accurate registration method. And, the motorized fixture controls rotation and tilting to get precise the measuring data and registration. The proposed motorized fixture and registration method have advantages in accurate registration and precise measurement, compared with the conventional methods.

Modeling and Analysis of Distance-Based Registration with Implicit Registration

  • Baek, Jang-Hyun;Ryu, Byung-Han
    • ETRI Journal
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    • v.25 no.6
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    • pp.527-530
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    • 2003
  • In this study, we consider distance-based registration (DBR) and propose a DBR with implicit registration (DBIR) in order to improve the performance of the DBR. With analytical models based on a 2-dimensional random walk in a hexagonal cell configuration, we analyzed the performance of the DBR and DBIR. Our results showed that the DBIR always outperforms the DBR.

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Performance Analysis of Distance-based Location Registration Scheme Considering Terminating Call (착신호를 고려한 거리기준 위치등록 방법의 성능분석)

  • Lim, Seog-Ku;Jang, Hee-Seon;Cho, Kee-Seong
    • The KIPS Transactions:PartC
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    • v.10C no.1
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    • pp.103-110
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    • 2003
  • In this paper, we propose and evaluate the performance distance-based registration considering call arrival. We propose the mobility model, which can be used to analyze the performance of proposed registration schemes. Numerical results show that zone-based registration needs less number of registration than distance-based registration. On the other hand, the registration load of the distance-based registration is equally distributed to all cells in a location area. However, the registration load of the distance-based registration considering cail arrival is similar to that of zone-based registration and equally distributed to all cells in a location area. Therefore, the proposed scheme can be effectively used restricted radio resources.