• KIPS Transactions on Software and Data Engineering
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• v.6 no.2
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• pp.91-102
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• 2017

Many of the wearable smart fitness devices provide services related to users' heartbeat rates. These services use fixed standards which have been pre-determined based on statistical data. However, because body conditions significantly differ between individuals, the services applying fixed standards to all individuals are not reliable. This paper proposes the Feedback-RFC model which adapts heartbeat standards to individual users' exercise abilities and also proposes a method to implement the model. This paper also shows the effectiveness of the Feedback-RFC model by collecting heartbeat data from 12 participants and evaluating the model with the data.

• Journal of electromagnetic engineering and science
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• v.15 no.4
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• pp.219-223
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• 2015

In this paper, a miniaturized radio frequency choke (RFC) using modified stubs is proposed to improve isolation characteristics in a multiple-input-multiple-output (MIMO) antenna system. The proposed RFC, based on the LC resonance, is designed to suppress the leakage current that leads to the degradation of antenna diversity performances in the MIMO antenna configuration. The proposed RFC is composed of two open stubs that are implemented on the top of the ground plane and miniaturized by adding a slit structure on the ground plane. The MIMO antennas are also designed to verify isolation performance in the LTE 2300 band (2,300-2,400 MHz). The MIMO antennas perform well with low reflection coefficient characteristics and high isolation characteristics in the whole LTE 2300 band. To evaluate the isolation in the MIMO system, the envelope correlation coefficient (ECC) is calculated, and the value is less than 0.08. The achieved ECC is regarded as a reasonable result for improving isolation performance in the frequency range of 2,300-2,400 MHz; also, radiation patterns of antenna elements are maintained regardless of the presence of RFC.

• The Journal of the Korea Contents Association
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• v.6 no.3
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• pp.63-74
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• 2006

Recently many ASP applications have been released which enable them to accept, save and manipulate files uploaded with a web browser. The files are uploaded via an HTML POST form using RFC 1867 In particular, the file transfer via the HTTP port is getting more important because of the current Internet security issues. In this paper, we implement a form-based ASP upload component and disclose explicitly most of the main codes. That is, the open source might be helpful to develop the new ASP applications including file upload function in the future. We also show the upload time and CPU usage time of the proposed upload component and compare with the well-known commercial ones, showing the performance metrics of the proposed component are comparable to those of commercial ones.

• Proceedings of the IEEK Conference
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• 2004.08c
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• pp.585-587
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• 2004

Diameter base protocol is intended to provide an AAA framework for applications such as IP mobility. Currently Diameter base protocol is standardized to RFC 3588, but there are some problems. One of them, path authorization is already argued at IETF WG Mailing List. According to RFC 3588, path authorization function causes inefficient data traffic and conflicts with RFC 3588 itself. In this paper, we analysis these problems about path authorization function and propose more improved solution.

• 정보보호뉴스
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• s.138
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• pp.54-57
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• 2009

컴퓨터 포렌식은 사고와 관련된 시스템을 조사해 범죄에 이용된 증거를 수집해 입증하는 분야이다. 국내에서는 아직 증거수집에 대한 프로세스가 공개되지 않고 있는데, 그 이유는 일반기업에서 해당 업무를 수행할 권한이 없기 때문이다. 이에 반해 해외의 경우, 해당 프로세스에 대한 'Rfc3227(http://www.ietf.org/rfc/rfc3227.txt)' 지침이 마련돼 있으며, 이것은 IETF(The Internet Engineering Task Force)의 BCP(Best Current Practice)로 등록돼 있는 표준화 절차다. 이는 증거수집 및 보관이라는 업무가 반드시 사법적인 권한을 가지고 수행해야 하는 업무가 아니라, 사고가 발생한 시스템에 대한 원인을 파악하고 재발 방지를 위한 목적을 가지고 있기 때문이다. 위와 같은 목적으로 국내에서는 딱딱한 컴퓨터 포렌식이 아닌 현업에게 활용 가능한 컴퓨터 포렌식에 대해 정리해 보고자 한다.

• Journal of the Korean Society for Precision Engineering
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• v.31 no.10
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• pp.929-934
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• 2014

Reaction force compensation (RFC) mechanism can relieve the vibration of base system caused by acceleration and deceleration of mover. In this paper, we propose a new passive RFC mechanism with a movable additional mass to reduce vibration of the system base as well as displacement of the magnet track. First, equation of motion for the new passive RFC mechanism is derived and simulated to tune design parameters such as masses and spring coefficients. Simulation results show that the vibration of the system base of the stage with the new RFC mechanism.

• Environmental Analysis Health and Toxicology
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• v.6 no.1_2
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• pp.25-38
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• 1991

The immunopotenciating effects of petroleum ether extract, ethanol extract and butanol fraction of panax ginseng on the immunotoxicity of Cimetidine were investigated in ICR mice. Immune responses were evaluated by antibody production, Arthus reaction, delayed type hypersensitivity (DTH), and rosette forming cell (RFC) in mice, sensitized and challenged with sheep red blood cells. To investigate the change of the non-specific immune responses, phagocyte activity and number of leukocytes in peripheral blood were measured also. The results of this study are summarized as followings; 1. Cimetidine treated group as compared with normal group generally decreased HA, 2-MER, RFC, number of circulating leukocytes and phagocyte activity whereas in-creased Arthus reaction and DTH. 2. The panax ginseng petroleum ether extract combined administration group as compared with the control group remarkably increased HA, 2-MER, number of circulating leukocytes and phagocyte activity. 3. The panax ginseng ethanol extract combined administration group as compared with the control group remarkably increased Arthus reaction, DTH, HA, RFC, number of circulating leukocytes and phagocyte activity. 4. The panax ginseng butanol fraction combined administration group as compared with the control group remarkably increased Arthus reaction, HA, 2-MER, RFC, number of circulating leukocytes and phagocyte activity.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.10a
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• pp.673-676
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• 2003

Call Processing Language is a standards which support the PSTN like various additional services send-receive call forbidden, call forwarding. This standards developed by IETF iptel working group. we can apply to users demands that want to possibilities of call connection by relating RFC 3261. This paper describes the design and development of CPL proxy in detail. Designing and implementation is accomplished in Linux kerenl version 2.4.18 using C Language.

• Environmental Analysis Health and Toxicology
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• v.5 no.3_4
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• pp.37-45
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• 1990

Experiments were performed on mice to investigate the influences of cimetidine, ranitidine and famotidine on the immune response. Immune response were evaluated by antibody, Arthus reaction (Arthus), delayed type hypersensitivity (DTH), rosette forming cell (RFC), phagocyte activity and whit( blood cell (WBC) in mice, sensitized and challenged with sheep red blood cells (SRBC). The weight of liver, spleen and thymus were measured. Following results obtained in this experiment. 1) The administration of cimetidine as compared to normal group significantly decreased Arthus, Hemagglutinin titer (HA), RFC, DTH, WBC and phagocyte activity, but increased the activity of serum albumin. 2) The administration of ranitidine as compared to normal group decreased RFC and HA. 3) The administration of Famotidine as compared to normal group decreased DTH and RFC, and significantly decreased HA, Arthus and serum protein. 4) The administration of ranitidine and famotidine decreased more humoral immune response than cellular immune response, but the administration of cimetidine significantly decreased humoral and cellular immune response, WBC and phagocyte activity.

• Proceedings of the KIEE Conference
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• 2003.11c
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• pp.852-855
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• 2003

This paper reports the RFC(Recursive Flow Classification) algorithm that is available on multiple fields. It is easy to be implemented by both software and hardware. For high speed classification of packets, the implementation of RFC is essential by hardware. Hence, in this paper, RFC algorithm is simulated by Verilog-HDL, and it verify the efficiency of the algorithm. The result shows that the algorithm can perform a packet classification within several cycles. It is not only much faster than software implementation but also enough to support OC192c.