• Proceedings of the Korea Multimedia Society Conference
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• 2002.11b
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• pp.649-652
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• 2002

멀티캐스트는 현재 일-대-글 통신서비스로부터 일-대-다 또는 다-대-다 통신서비스에서 신뢰성을 요구하는 새로운 요구가 많아지고 있다. 그리고 최근 대두되고 있는 멀티미디어 응용을 지원하기 위해서는 광대역 네트워크의 링크, 실시간 전송, 보다 효과적인 멀티캐스트 프로토콜이 요구된다. 멀티캐스트 프로토콜 알고리즘에는 DVMRP, MOSPF, CBT, PIM 구조의 멀티캐스팅 프로토콜 있다. 이는 네트워크 패킷의 특성을 송수신의 경로비용으로 라우터 자체의 근거리 알고리즘이 적용되고 있다. 본 연구에서는 멀티캐스트 프로토콜인 CBT와 PIM-DM종단간의 특징을 이용하여 비교 분석하여 이용하여 각 데이터 패킷 전송을 위한 공정하고 실용적인 대역폭 사용하고 대역폭과 데이터처리능력 시뮬레이션 상에서 구현하고 성능을 평가한다.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.12 no.5
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• pp.734-739
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• 2001

In this paper, the technique of analysis and optimization on the Passive intermodulation(PIM) in a filter using coaxial transmission resonator, is presented. The developed simulation technique can reduce PIM power without the degradation of the linear filter response, through the variation of filter dimensions. The increase of PIM in filter is depended on currents flowing through each resonator forming filter. The reduction of these currents therefore makes the reduction of PIM power.

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2006.09b
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• pp.761-762
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• 2006

W-Cu alloy was very useful material for a heat sink, high electric contact and EDM electrode. Powder injection molding (PIM) is the optimum manufacturing technology to provide W-Cu components with low-cost and high-volume. We used various compositions of tungsten coated copper powders (W-Cu with 10 to 80 wt-% of copper) to manufacture W-Cu components by PIM. The optimum mixing, injection molding, debinding and sintering conditions to provide the high performance W-Cu components were investigated. The thermal and mechanical properties of W-Cu parts by PIM were measured. Finally, we can verify the high performance of W-Cu components by PIM with the tungsten coated copper.

• Proceedings of the IEEK Conference
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• 2002.06a
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• pp.275-278
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• 2002

This paper proposes an efficient micro mobility scheme to support user mobility inside an access network which employs Ipv6. The proposed scheme, namely SMM(Sparse-mode Multicast for mobility), utilizes a class of multicast protocol, PIM-SM, in the visited access network to reduce signaling to the home agent as well as to the correspondent node and to minimize packet loss during the handoff when mobile user changes its point of attachment frequently. Through the simulation, the performance of the proposed SMM is analyzed and compared with those of Mobile nv6 and for the case which adpots PIM-DM. The result shows that SMM provides significantly better performance in terms of packet loss that is invariant to transmission rate and packet size.

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2006.09a
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• pp.219-220
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• 2006

To understand the effect of powder characteristics on the thermal debinding behavior, PIM parts produced with powders with different particle sizes and particle shapes were examined to determine their weight losses during thermal debinding. The results show that the average diameter of the pore channel in the compact increased when the temperature increased and when coarse powders were used. However, the weight loss rates did not increase proportionally with the pore size. This suggests that the different powders that are frequently used in PIM parts do not affect the thermal debinding rate significantly. This is because the pore size is much larger than the mean free path of the decomposed gas molecules. Thus, the diffusion rates of the gases are not rate-controlling in thermal debinding. The controlling mechanism of the thermal debinding rate is the decomposition of the backbone binder in the PIM parts.

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2006.09a
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• pp.499-500
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• 2006

With the capability of net shaping for complex 3D geometry, powder injection molding (PIM) is widely used for automotive parts, electronics and medical industry. In this study, an ultrasonic dental scaler tip produced by machining process was redesigned for the PIM process. An injection mold was designed and machined to produce the dental scaler tip by the PIM process.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.27-29
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• 2023

폰노이만 구조를 따르는 기존의 컴퓨터 시스템은 프로세서와 메모리의 역할이 구분되어 있으며 프로세서는 메모리에 저장된 명령어와 데이터를 불러와 실행한다. 이 과정에서 메모리와 프로세서 간에 발생하는 데이터 이동은 메모리 집약적인 응용을 처리하는데 있어서 심각한 오버헤드를 야기할수 있다. PIM(Processing-In-Memory)은 데이터 이동 병목을 해결하기 위해서 메모리에 프로세서의 능력을 통합하는 기술로서 최근의 메모리 기술의 발전으로 주목받고 있다. 본 논문에서는 UPMEM사의 상용 PIM 제품을 기반으로 몬테카를로 방법을 이용한 원주율 추정을 구현하고 성능 확장성을 분석하였다.

• KSBB Journal
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• v.21 no.5
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• pp.371-375
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• 2006

Frontal analysis(FA) and Pulsed input method(PIM) have been frequently utilized to measure isotherm of single solute, as well as non-competitive isotherms of two solutes in chromatography(1). FA and PIM were used in this study as complementary methods to measure adsorption isotherms of loxoprofen racemate in HPLC. Prior to FA and PIM experiments, measurements of loxoprofen solubility were made at hexane/ethanol=50/50, 80/20, 95/5(v/v) with acetic acid(0.5%) for adjusting pH. The last composition(95/5) of hexane/ethanol allows us to separate loxoprofen racemate into two forms(retentate, extract). PIM and FA were used to determine the isotherms of re-and ex-loxoprofen.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.14 no.7
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• pp.692-698
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• 2003

This paper presents IM model which is produced in 3 port RF passive component. We calculated forward and reflect PIM of 3 port component by using the model. And they are reasonable agreement with measurement result like below. In the case of forward IM, calculated result is -122 dBc(at 43 dBm), which differ 2.5 dB with measurement result. And reflected IM, the average calculated result is -130 dBc(at 43 dBm), which differ 3 dB with measurement result. The results which are calculated and measured under various condition(IM source level, frequency sweep, contour length, etc.) show that forward method gets more fixed result than that of reflect. Consequently, PIM of 3 port component is predicted and analyzed for desensitizing by the proposed model.

• KIISE Transactions on Computing Practices
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• v.23 no.1
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• pp.13-27
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• 2017

This paper presents a tool that automatically generates mobile web applications from user interface (UI) models which are based on PELUM (Pattern and Event based Logical User Interface Modeling). PELUM is a method for the effective development of UI-centered embedded systems via UI modeling. The proposed tool consists of a model editor and a code generator. The former provides an environment for modeling a Logical UI Model (LUM) and a Programming Interface Model (PIM) on the web. On the other hand, the code generator sets the screen configuration and events' behavior, according to the LUM, synthesizing a local database schema according to the PIM, and then generates an executable mobile web app. It also can produce mashup web apps by receiving an open API address via the PIM. The generated mobile web apps follow the Model-View-Controller (MVC) architecture in order for users to easily customize them. The proposed tool enables them to generate mobile web apps that can be executed on various devices by modeling logical UIs on the web.