• Title/Summary/Keyword: FMM

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Numerical Analysis of a Microstrip Antenna by 3-dimensional FMM (3차원 FMM을 이용한 마이크로스트립 안테나의 특성 해석)

  • Oh, Jae-Hyun;Jeon, Sang-Bong;Ahn, Chang-Hoi
    • Proceedings of the KIEE Conference
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    • 2007.07a
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    • pp.268-269
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    • 2007
  • In this paper, we develop 3-dimensional FMM using the RWG basis function to simulate the plat-type antenna and reduce the computing time. To examine the efficiency of FMM algorithm, a scattering by a simple PEC plane is analysed and the correct current distribution is obtained. This 3-dimensional FMM is applied to analysis a microstrip antenna and shows good performance.

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Protein Quality Evaluation of Cooked Monkfish (Lophiomus setigerus) Meats

  • Jeung Young-Ae;Ryu Hong-Soo;Shin Eun-Soo;Mun Sook-Im
    • Fisheries and Aquatic Sciences
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    • v.6 no.4
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    • pp.165-171
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    • 2003
  • To investigate the effect of cooking methods on protein quality of domestic fresh monkfish meat (FMM) and imported frozen monkfish meat (IMM), in vitro protein qualities were determined by amino acid anlysis, trypsin indigestible substrate (TIS) formation, and protein digestibility using the four-enzyme method. Crude protein contents of the boiled FMM and IMM were $90\%$ of the dry base, which were higher than fresh FMM $(82\%)$ and IMM $(84\%)$. Profiles of total amino acid in FMM and IMM were not changed by cooking methods. Total free amino acid contents decreased to $ 29.0-33.6\%$ for boiled $(l00^{\circ}C,\;10 min)\;and\;24\%$ for steamed $(100^{\circ}C,\;10\;min)$ samples. In vitro protein digestibilities of boiled and steamed FMM incnased $86.6-86.8\%$, compared to raw IMM $(82.9\%)$, boiled and steamed IMM $85.1-85.5\%$ and raw IMM $(83.6\%)$. TIS of FMM (23.6 mg/g solid) and IMM (15.9 mg/g solid) showed no significant (p<0.05) difference in cooking methods. The C-PERs (computed protein efficiency ratio) of boiled FMM (2.63) and IMM (2.50) were significantly higher (<0.05) than raw (1.97) and steamed FMM(1.97) and IMM(1.94). These results demonstrate that boiling of FMM and IMM improves protein digestibility and C-PER when compared to steamed FMM and IMM. Therefore, boiling could be an excellent means to maintain high-protein quality of monkfish meat. Also, the cooking method may be applicable to the preparation of monkfish stew without any loss of free amino acids.

Quality Characteristics and Antioxidant Activity of Mulberry Leaf Tea Fermented by Monascus pilosus (Monascus pilosus로 발효시킨 뽕잎차의 품질특성과 항산화능)

  • Lee, Sang-Il;Lee, Ye-Kyung;Choi, Jong-Keun;Yang, Seung-Hwan;Lee, In-Ae;Suh, Joo-Won;Kim, Soon-Dong
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.41 no.5
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    • pp.706-713
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    • 2012
  • This study was carried out to investigate the contents of monacolin K and citrinin, along with the sensory quality and antioxidant activity of mulberry leaf tea fermented by $Monascus$ $pilsous$ (FMM). Total monacolin K content of FMM was 0.058%, but citrinin was not detected. Redness of brewed FMM was remarkably higher than that of unfermented mulberry leaf tea (UFM). In sensory evaluation of brewed FMM, while astringent taste and savory taste were lower, flavor, color, and overall acceptability were significantly higher than those of UFM. Total polyphenol contents of UFM and FMM were 83.1 and 23.61 mg/g (dry basis), total flavonoid contents of UFM and FMM were 17.96 and 3.99 mg/g (dry basis), respectively. Xanthine oxidase (XO) inhibitory activity and superoxide dismutase (SOD)-like activity of FMM were lower than those of UFM. Electron-donating ability and ferric-reducing antioxidant power of FMM were slightly lower than those of UFM. However, the antioxidant activities of FMM per polyphenol content were markedly higher than those of UFM. These results suggest that FMM may scavenge excessive reactive oxygen spices (ROS) via inhibition of XO and SOD-like activity. Furthermore, FMM demonstrated relatively higher acceptability and antioxidant ability along with functionality of $Hongguk$ (red yeast rice), and therefore could be utilized to prevent various ROS-induced diseases.

Fast Analysis of Fractal Antenna by Using FMM (FMM에 의한 프랙탈 안테나 고속 해석)

  • Kim, Yo-Sik;Lee, Kwang-Jae;Kim, Kun-Woo;Oh, Kyung-Hyun;Lee, Taek-Kyung;Lee, Jae-Wook
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.19 no.2
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    • pp.121-129
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    • 2008
  • In this paper, we present a fast analysis of multilayer microstrip fractal structure by using the fast multipole method (FMM). In the analysis, accurate spatial green's functions from the real-axis integration method(RAIM) are employed to solve the mixed potential integral equation(MPIE) with FMM algorithm. MoM's iteration and memory requirement is $O(N^2)$ in case of calculation using the green function. the problem is the unknown number N can be extremely large for calculation of large scale objects and high accuracy. To improve these problem is fast algorithm FMM. FMM use the addition theorem of green function. So, it reduce the complexity of a matrix-vector multiplication and reduce the cost of calculation to the order of $O(N^{1.5})$, The efficiency is proved from comparing calculation results of the moment method and Fast algorithm.

FMM: Fusion media middleware for actual feeling service (실감 서비스 제공을 위한 융합 미디어 미들웨어)

  • Lee, Ji-Hye;Yoon, Yong-Ik
    • Journal of Korea Multimedia Society
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    • v.13 no.2
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    • pp.308-315
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    • 2010
  • User Generated contents(UGC) interchange with internet users actively in Web2.0 environment. According to growth of content sharing site, the number of non-expert's contents increased. But non-expert's contents have a simple media just recorded. For providing actual feeling like effects and actions to non-expert's contents, we suggest Fusion Media Middleware(FMM). The FMM can increase user satisfaction by providing actual feeling. Furthermore, The content changes advanced media that has emotional impression. The FMM for providing actual feeling classify the inputted media as a scene based on MPEG-7. The FMM provide an actual feeling to simple media by inserting effects like a sound, image and text among the classified media. Using the BSD code of MPEG-21, the FMM can link up with inputted media and effects. Through the mapping BSD code the FMM control synchronization between media and effects. In this paper, Using the Fusion Media Middleware, the non-expert's contents express value as multimedia that has an actual feeling. Futhermore, the FMM creates flow of new media circulation.

Recent Development of Linear Scaling Quantum Theories in GAMESS

  • Choi, Cheol-Ho
    • Bulletin of the Korean Chemical Society
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    • v.24 no.6
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    • pp.733-738
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    • 2003
  • Linear scaling quantum theories are reviewed especially focusing on the method adopted in GAMESS. The three key translation equations of the fast multipole method (FMM) are deduced from the general polypolar expansions given earlier by Steinborn and Ruedenberg. Simplifications are introduced for the rotation-based FMM that lead to a very compact FMM formalism. The OPS (optimum parameter searching) procedure, a stable and efficient way of obtaining the optimum set of FMM parameters, is established with complete control over the tolerable error ε. In addition, a new parallel FMM algorithm, requiring virtually no inter-node communication, is suggested which is suitable for the parallel construction of Fock matrices in electronic structure calculations.

A Study of Accuracy Improvement for Scattering Analysis of FMM Method (FMM 기법의 산란해석 정확도 향상 연구)

  • Kim, Young-joo;Cho, Young-Ki;Son, Hyun
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.12 no.6
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    • pp.972-982
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    • 2001
  • FMM(Fast Multipole Method) is suitable numerical method for radar cross section calculation of arbitrary large conducting bodies due to reduction of computation time. The accuracy of the numerical results, however, can influenced by selection of grouping method and segment length, in particular, far the case that cross section of the scatter is of the narrow width elliptical type. So, we describe the FMM method which can be deal effectively with such difficulties for both TM and TE polarization case. In order to check the present method the results are compared with those obtained by Method of Moments.

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Paratic Impedance Extraction of FC-PGA Package Pin using the Static Fast Multipole Method (Static FMM을 이용한 FC-PGA 패키지 핀에서의 기생 임피던스 추출)

  • 천정남;이정태;어수지;김형동
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.12 no.7
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    • pp.1076-1085
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    • 2001
  • In this paper, the FMM(Fast Multipole Method) combined with GMRES(Generalized Minimal RESidual Method) matrix solver is used to extract the parasitic impedance for complicated 3-D structures in uniform dielectric materials which limit the use of MoM(Method of Moment) due to its large computation time and memory requirement. This algorithm is a fast multipole-accelerated method based on quasistatic analysis and is very efficient for computing impedance between conductors. This paper proved the accuracy and efficiency of the FMM by comparing with MoM in simple examples. Finally the parasitic impedance of FC-PGA(Flip Chip Pin Grid Array) Package pins has been extracted by this algorithm and we have considered the possibility of the EMI/EMC problem caused by the signal interference.

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A Study of 2 Nonsymmetrical Dimension Conducting Body Scattering using FMM (FMM을 이용한 2차원 비대칭 도체산란연구)

  • 김영주;조영기
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • 2001.11a
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    • pp.328-331
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    • 2001
  • FMM(Fast Multipole Method)은 계산시간이나 메모리 측면에서 장점으로 인해, 수치해석기법으로써는 비교적 대형 구조물의 RCS 계산도 가능하며, 현재 연구가 활발히 진행되고 있는 기법중의 하나이다. 하지만, 폭이 좁은 타원형 형태의 산란체에 대한 해석에서 절점들을 그룹화하는 과정에서 정확도가 문제되었다. 따라서, 본 논문에서는 언급한 구조에 대한 RCS를 계산할 때 발생하는 문제점과 이를 해결하기 위한 방법을 제안한다. 해석은 2차원 도체의 TM 및 TM 편파에 대한 산란특성을 계산하였다.

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Fourier Modal Method for Optical Dipole Radiation in Photonic Structures

  • Park, Sungjae;Hahn, Joonku;Kim, Hwi
    • Current Optics and Photonics
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    • v.5 no.6
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    • pp.597-605
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    • 2021
  • An extended Fourier modal method (FMM) for optical dipole radiation in three-dimensional photonic structures is proposed. The core elements of the proposed FMM are the stable bidirectional scattering-matrix algorithm for modeling internal optical emission, and a novel optical-dipole-source model that prevents numerical errors induced by the Gibbs phenomenon. Through the proposed scheme, the FMM is extended to model a wide range of source-embedded photonic structures.