• Title/Summary/Keyword: Biological mesh

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Hardness and Effect of Particle Sizes on Pasting Properties of Korean Rices differing in Maturity (숙기가 다른 우리나라 쌀의 경도와 입자크기별 호화성질)

  • Lee, Soo-Jeong;Kim, Sung-Kon
    • Applied Biological Chemistry
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    • v.42 no.1
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    • pp.45-48
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    • 1999
  • Rice was ground on a blade-type food mixer and sieved on meshes. The throughs on 60 and 80 mesh sieves were significantly different among maturity groups. The hardness of rice grain was negatively correlated with throughs on 60 and 80 mesh sieves and positively correlated with overs on 20 mesh sieve. The amylograph peak viscosity was increased as the particles became finer, but peak viscosities of the throughs on 60 and 80 mesh sieves were not significantly different.

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A Case of Traumatic Ventral Hernia Repair with a Porcine Dermal Collagen Graft (Permacol) (외상성 복벽 탈장 환자에서 biologic mesh를 이용한 치료)

  • Yu, Byung Chul;Chung, Min
    • Journal of Trauma and Injury
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    • v.25 no.2
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    • pp.63-66
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    • 2012
  • Resection of the bowel is necessary for the repair of a ventral hernia after recovery from trauma in some cases. In such instances, polyester or polypropylene meshcannot be used due to the possibility of infection; we had to use biological mesh instead. We report a case in which a traumatic hernia was repaired with Permacol (Covidien, Norwalk, CT, USA). A 42-year-old male patient had been injured by a factory machine seven months prior to admission. At that time, he had abdominal wall injury and small bowel perforation. His abdominal wall had been a defect after operation. A CT scan of the abdomen showed that the left abdominal wall, which is lateral to left rectus abdominis muscle had only one muscle layer, an external oblique muscle, and that a previous abdominal incision had a defect along the entire incision. During the exploration, 10 cm of small bowel was removed due to firm adhesion to the previous surgical scar. Permacol mesh was applied and fixed with transfascial fixations and tacks by using the intraperitoneal onlay mesh technique. There were no complications after the surgery and the patient was discharged without any problems.

Dry Milling Process of Barley Kernels (건식 보리 제분공정에 관한 연구)

  • Mok, Chul-Kyoon;Lee, Sang-Hyo;Lee, Hyun-Yu;Nam, Young-Jung
    • Applied Biological Chemistry
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    • v.28 no.3
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    • pp.115-123
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    • 1985
  • The milling characteristics of barley of various moisture content were investigated using Brabender Grain Hardness Tester (GHT) to set up the optimum conditions of dry milling process. The optimum GHT clearance were 1/0-1/10 for-10+12 mesh particles, 0/5-0/15 for-12+18 mesh, and 0/-15 for -18 mesh. The grain hardness of barley kernel increased with moisture content and the grindability, on the other hand, decreased. The consumed electric energy in milling increased with moisture content and showed the maximum value at the moisture content of 14.04%. The optimum conditions of dry milling of barley were 0/-5 GHT clearance and 12.80% moisture content and the consumed electric energy was 92.41Kwh for the production of 1,000kg of -18 mesh particles.

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Estimating the Economic Effectiveness of Increasing Mesh Sizes in the Small Yellow Croaker Gillnet fishery (참조기 유자망어업의 망목 확대에 따른 경제적 효과분석)

  • Oh, Taeg-Yun;Cho, Young-Bok;Seo, Young-Il;Kim, Byung-Yeob;Lee, Ju-Hee;Kim, Do-Hoon
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.48 no.4
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    • pp.352-359
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    • 2012
  • For rebuilding and managing fish stocks and fisheries, the biological and socioeconomic evaluations on fisheries management regulations are important. This study aimed to estimate the economic effectiveness of different mesh sizes in the yellow croaker gillnet fishery. In particular, by comparing economic effects of mesh sizes, 50mm and 52mm, it aimed to provide the economic validity for increasing mesh sizes. Analytical results showed that the fishing revenue was higher in the vessels using a mesh size over 52mm than that in the vessels using a mesh size less than 50mm. In addition, the effect of fishing cost reduction was also larger in the vessels using a mesh size over 52mm than that in the vessels using a mesh size less than 50mm.

The difference of selectivity of gill net between least square method with polynomials in Kitahara's and maximum likelihood analysis (자망 선택성에서 다항식을 사용한 경우의 Kitahara에 의한 최소제곱법과 최우법의 차이)

  • Park, Hae-Hoon;Millar, Russell B.;Bae, Bong-Seong;An, Heui-Chun;Hwang, Seon-Jae
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.46 no.3
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    • pp.223-231
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    • 2010
  • This paper showed the difference between the selectivity of gill net by least square method with polynomials in Kitahara's and that by maximum likelihood analysis for Japanese sandfish and Korean flounder. Catch experiments for Japanese sandfish using commercial vessels off the eastern coast of Korea were conducted with six different mesh sizes between October and December 2007 and those for Korean flounder with five different mesh sizes between 2008 and 2009. The mesh size of 50% probability of catch corresponding to biological maturity length of fish was not different between that by least square method and that by maximum likelihood analysis for Japanese sandfish, however, a little different for Korean flounder, that is, those mesh sizes of 50% probability of catch for biological maturity length of Korean flounder were 10.6cm and 10.1cm by least square method and maximum likelihood analysis, respectively.

Male-Silkmoth-Inspired Routing Algorithm for Large-Scale Wireless Mesh Networks

  • Nugroho, Dwi Agung;Prasetiadi, Agi;Kim, Dong-Seong
    • Journal of Communications and Networks
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    • v.17 no.4
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    • pp.384-393
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    • 2015
  • This paper proposes an insect behavior-inspired routing algorithm for large-scale wireless mesh networks. The proposed algorithm is adapted from the behavior of an insect called Bombyx mori, a male silkmoth. Its unique behavior is its flying technique to find the source of pheromones. The algorithm consists of two steps: the shortest-path algorithm and the zigzag-path algorithm. First, the shortest-path algorithm is employed to transmit data. After half of the total hops, the zigzag-path algorithm, which is based on the movement of the male B. mori, is applied. In order to adapt the biological behavior to large-scale wireless mesh networks, we use a mesh topology for implementing the algorithm. Simulation results show that the total energy used and the decision time for routing of the proposed algorithm are improved under certain conditions.

Hydration Properties of Naked Barley by Kernel Sizes (쌀보리의 입자별 수분 흡수 특성)

  • Yun, Young-Jin;Kim, Kwan;Kim, Sung-Kon;Kim, Dong-Youn;Park, Yang-Kyun
    • Applied Biological Chemistry
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    • v.31 no.1
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    • pp.13-20
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    • 1988
  • The hydration characteristics of four naked baley varieties by different kernel sizes were investigated. The predominant kernel size was 7 mesh, followed by 10 mesh kernel, of which comprised $86{\sim}94%$ of the total kernel. Diffusion coefficients of naked barleys at $40^{\circ}C$ increased as the kernel sizes decreased. The volume increases of naked barleys were linearly related to the moisture gain, regardless variety and kernel size.

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MRI Content-Adaptive Finite Element Mesh Generation Toolbox

  • Lee W.H.;Kim T.S.;Cho M.H.;Lee S.Y.
    • Journal of Biomedical Engineering Research
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    • v.27 no.3
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    • pp.110-116
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    • 2006
  • Finite element method (FEM) provides several advantages over other numerical methods such as boundary element method, since it allows truly volumetric analysis and incorporation of realistic electrical conductivity values. Finite element mesh generation is the first requirement in such in FEM to represent the volumetric domain of interest with numerous finite elements accurately. However, conventional mesh generators and approaches offered by commercial packages do not generate meshes that are content-adaptive to the contents of given images. In this paper, we present software that has been implemented to generate content-adaptive finite element meshes (cMESHes) based on the contents of MR images. The software offers various computational tools for cMESH generation from multi-slice MR images. The software named as the Content-adaptive FE Mesh Generation Toolbox runs under the commercially available technical computation software called Matlab. The major routines in the toolbox include anisotropic filtering of MR images, feature map generation, content-adaptive node generation, Delaunay tessellation, and MRI segmentation for the head conductivity modeling. The presented tools should be useful to researchers who wish to generate efficient mesh models from a set of MR images. The toolbox is available upon request made to the Functional and Metabolic Imaging Center or Bio-imaging Laboratory at Kyung Hee University in Korea.

Improved structures of stainless steel current collector increase power generation of microbial fuel cells by decreasing cathodic charge transfer impedance

  • Nam, Taehui;Son, Sunghoon;Kim, Eojn;Tran, Huong Viet Hoa;Koo, Bonyoung;Chai, Hyungwon;Kim, Junhyuk;Pandit, Soumya;Gurung, Anup;Oh, Sang-Eun;Kim, Eun Jung;Choi, Yonghoon;Jung, Sokhee P.
    • Environmental Engineering Research
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    • v.23 no.4
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    • pp.383-389
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    • 2018
  • Microbial fuel cell (MFC) is an innovative environmental and energy system that converts organic wastewater into electrical energy. For practical implementation of MFC as a wastewater treatment process, a number of limitations need to be overcome. Improving cathodic performance is one of major challenges, and introduction of a current collector can be an easy and practical solution. In this study, three types of current collectors made of stainless steel (SS) were tested in a single-chamber cubic MFC. The three current collectors had different contact areas to the cathode (P $1.0cm^2$; PC $4.3cm^2$; PM $6.5cm^2$) and increasing the contacting area enhanced the power and current generations and coulombic and energy recoveries by mainly decreasing cathodic charge transfer impedance. Application of the SS mesh to the cathode (PM) improved maximum power density, optimum current density and maximum current density by 8.8%, 3.6% and 6.7%, respectively, comparing with P of no SS mesh. The SS mesh decreased cathodic polarization resistance by up to 16%, and cathodic charge transfer impedance by up to 39%, possibly because the SS mesh enhanced electron transport and oxygen reduction reaction. However, application of the SS mesh had little effect on ohmic impedance.

Two Species of Callyspongiidae (Demospongiae: Haplosclerida) from Korea

  • Kang, Dong-Won;Sim, Chung-Ja
    • Animal Systematics, Evolution and Diversity
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    • v.24 no.1
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    • pp.39-42
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    • 2008
  • Two marine species of family Callyspongiidae, Callyspongia mookriensis n. sp. and Siphonochalina truncata, were collected from Chujado Island and Jejudo Island, Korea during 2005-2007. Callyspongia mookriensis n. sp. is similar to Callyspongia flabelliformis Tanita, 1968 in type of spicule, habitat and growth form but differs in spicule and mesh size. The new species has longer oxea and broader mesh than Callyspongia flabelliformis's. The overall shape and skeleton of Siphonochalina truncata are nearly identical with specimens described by Lindgren (1897).