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Search Results: 1 - 10 of 10276 matches for " Sung Park "
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Computation of the Strand Resistance Using the Core Wire Strain Measurement  [PDF]
Keunhee Cho, Sung Tae Kim, Sung Yong Park, Young-Hwan Park
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.511103

This paper proposes a method enabling to compute the prestressing strand resistance using the strain measured on only one core wire. Numerical analysis is conducted considering the pitch length of the strand and the diameters of the core wire and helical wires as parameters. The results verify that the relation between the stresses of the core wire and helical wires can be expressed in terms of the helical angle. Based on this observation, a formula computing directly the prestress force in the strand from the strain measured in the core wire is suggested. Owing to the recently developed measurement method for the core wire strain, the proposed formula can be exploited to determine the prestress of the strand.

Deformation Characteristics of Mono Strand Anchor Head  [PDF]
Sung Tae Kim, Jeong-Rae Cho, Keunhee Cho, Sung Yong Park, Young-Hwan Park
Engineering (ENG) , 2014, DOI: 10.4236/eng.2014.612072
Abstract: This paper investigates experimentally the deformation characteristics of the mono strand anchor head used in prestressed concrete bridge. Since the strains measurable in the anchor head are the axial and hoop strains, the deformation characteristics of the anchor head are examined by measuring these strains at various positions and according to the jacking force exerted on the pre-stressing strand. Moreover, the possibility to estimate the jacking force acting in the tendon based upon the measured strains and the corresponding error are evaluated.
Angiomyofibroblastoma of the vulva: A case report with literature review  [PDF]
Jung Ho Park, Mi Kyung Shin, Maria Lee, Sung Taek Park, Sung-Ho Park, Hong-Bae Kim
Case Reports in Clinical Medicine (CRCM) , 2013, DOI: 10.4236/crcm.2013.23060

Angiomyofibroblastoma (AMF) is a rare kind of soft tissue tumor that occurs predominantly in the vulva. Due to their location, clinicians often confuse AMF with Bartholin’s cyst or perineal hernia. Radiological evaluation is performed to rule out perineal hernia and invasive neoplasm. Like other benign mesenchymal tumors of vulva, AMF shows indolent behavior and rarely recurs after complete surgical excision.

Effect of Oral Administration of Jerusalem Artichoke Inulin on Reducing Blood Lipid and Glucose in STZ-Induced Diabetic Rats
Park Byung-Sung
Journal of Animal and Veterinary Advances , 2012, DOI: 10.3923/javaa.2011.2501.2507
Abstract: This study was carried out to investigate the effect of inulin extracted from Jerusalem artichoke (Helianthus tuberosus) on decrease of blood lipids and blood glucose in STZ-induced diabetic rats. The oral administration of inulin decreased blood lipids and blood glucose, implying the utility of artichoke-extracted inulin as a bioactive material to prevent metabolic diseases related to blood lipids and blood glucose of humans. Twenty four white rats were completely randomly allocated into four treatment groups with six rat per group and inulin was orally administrated to them. The experimental treatment groups were divided into one Normal Control group (NC) and three diabetic groups. The diabetic groups consisted of DC (diabetic control group), DC 50 (diabetic control group+oral administration of inulin, 50 mg kg-1 body weight) and DC 100 (diabetic control group+oral administration of inulin, 100 mg kg-1 body weight). Concerning growth performance, in comparison with the DC group, daily weight gain in the inulin-administered rats increased and recovered to the normal level. The diet intake was significantly low in the inulin-administrated groups (p<0.05) while statistically significant difference in the dietary efficiency between the DC and the inulin-administrated groups and between NC and the inulin-administrated groups was not found. Blood glucose was significantly lowered in the inulin-administrated groups (p<0.05). Compared with DC, the decrease of blood glucose in the inulin-administrated groups was 60.73-63.4% in the 4th week and showed a tendency of gradual recovery. Triacylglycerides in the blood, total cholesterol, LDLC and atherogenic index were significantly decreased by 27.13-32.91, 22.42-23.31, 35.41-38.28 and 49.71-57.11%, respectively in the inulin-administrated groups compared to the DC group. Conversely, HDLC was significantly increased by 24.89-47.20% (p<0.05). The weights of liver, kidney and heart but not the spleen were significantly heavy in the DC group, compared with the inulin-administrated groups (p<0.05).
Influence of Dietary Vegetable Wasps with Fly Pupa on Gastrointestinal Tract Microflora, Carcass Characteristics and Growth Performance in Broiler Chickens
Park Byung-Sung
Journal of Animal and Veterinary Advances , 2012, DOI: 10.3923/javaa.2011.2930.2935
Abstract: This study evaluated the effects of the addition of different levels of VWFP (Vegetable Wasps with Fly Pupa) on the growth performance, carcass characteristics and gastrointestinal microorganism populations of broiler chickens. About 400 animals (Ross 308, 1 day old) with an average body weight of 45 g were sorted randomly into 4 treatment groups and 4 repetition groups of 25 animals each. The treatment groups were divided into a control group not fed with VWFP and treatment groups fed with VWFP 2.0, 3.5 and 5.0%. The feeding test lasted 5 weeks separated by the grower period (0-21 days) and the finisher period (22-35 days). Although, the broilers weight gain and feed efficiency were significantly higher in the VWFP 3.5% (p<0.05) group throughout the entirety of the test period, no statistically significant differences were noted between the control group and other treatment groups. Triglyceride in the blood, total cholesterol and LDL-C were significantly lower in the VWFP treatment groups than in the control group (p<0.05). The blood lipid reduction rate ranged from 5.32-10.63% for triglycerides from 9.23-2.62% for total cholesterol and from 44.67-53.81% for LDL-C in the VWFP treatment groups relative to the control group. The abdominal fat weight ratio was reduced significantly in the VWFP treatment groups (p<0.05) compared with the control group with a reduction rate range of 17.67-21.68%. Broiler carcass weight, carcass rate and breast muscle, skin and thigh muscle weights against carcass weight were significantly higher in the VWFP 3.5% treatment group and a statistically significant difference was noted between the control group and other treatment groups (p<0.05). Enteropathogenic E. coli and Salmonella were lower in the VWFP treatment groups than in the control group whereas the beneficial bacteria Bifidobacteria were significantly higher in the VWFP treatment groups than in the control group (p<0.05).
Ehancement of Wireless Power Transmission Into Biological Tissues Using a High Surface Impedance Ground Plane
Sung Il Park
PIER , 2013, DOI: 10.2528/PIER12110902
Abstract: The system which enhances wireless power transmission efficiency for bio-medical applications has been proposed in this report. The system that operates at giga-hertz ranges is based on an inductive coupling between a transmitter coil and a receiver coil. A magnetic current source was modeled to a magnetic dipole with magnetic dipole moment m. To increase wireless power transmission efficiency, a high surface impedance ground plane was used and reflection from the ground plane is responsible for constructive interference. For this system, a theoretical study has been performed in this report by solving Sommerfeld integrals. Compared with the result of a system without a ground plane, the system with a high surface impedance ground plane showed enhancement of received power at a given transmitted power.
A postfoundationalist research paradigm of practical theology
Sung Kyu Park
HTS Theological Studies/Teologiese Studies , 2010, DOI: 10.4102/hts.v66i2.849
Abstract: Practical theology describes a context, interprets what has been discovered, brings in Christian norms, and constructs models of Christian practice. It is a process that involves epistemology and hermeneutics. For practical theology to be transformative, a postfoundational theological framework that allows interdisciplinary work and interpretation of experience in a given context is essential. Research in postfoundational practical theology can be conducted using narratives and social constructionism to obtain meaning from events or situations and to construct preferred realities. This article examines and argues for postfoundationalism – transversal reason, interdisciplinarity and interpreted experience – as a viable theological option against rigid foundationalism and relativistic nonfoundationalism. Also discussed are the process and the interdisciplinary nature of practical theology. It is suggested that narrative research and social constructionism should be part of the research paradigm of postfoundational practical theology. How to cite this article: Park, S-K., 2010, ‘A postfoundationalist research paradigm of practical theology ‘, HTS Teologiese Studies/Theological Studies 66(2), Art. #849, 6 pages. DOI: 10.4102/hts.v66i2.849
On the Pareto-Optimal Beam Structure and Design for Multi-User MIMO Interference Channels
Juho Park,Youngchul Sung
Mathematics , 2012, DOI: 10.1109/TSP.2013.2281784
Abstract: In this paper, the Pareto-optimal beam structure for multi-user multiple-input multiple-output (MIMO) interference channels is investigated and a necessary condition for any Pareto-optimal transmit signal covariance matrix is presented for the K-pair Gaussian (N,M_1,...,M_K) interference channel. It is shown that any Pareto-optimal transmit signal covariance matrix at a transmitter should have its column space contained in the union of the eigen-spaces of the channel matrices from the transmitter to all receivers. Based on this necessary condition, an efficient parameterization for the beam search space is proposed. The proposed parameterization is given by the product manifold of a Stiefel manifold and a subset of a hyperplane and enables us to construct a very efficient beam design algorithm by exploiting its rich geometrical structure and existing tools for optimization on Stiefel manifolds. Reduction in the beam search space dimension and computational complexity by the proposed parameterization and the proposed beam design approach is significant when the number of transmit antennas is larger than the sum of the numbers of receive antennas, as in upcoming cellular networks adopting massive MIMO technologies. Numerical results validate the proposed parameterization and the proposed cooperative beam design method based on the parameterization for MIMO interference channels.
Multiplicative functions preserving the sum-of-three-squares operation
Poo-Sung Park
Mathematics , 2015,
Abstract: If a multiplicative function $f$ satisfies $f(a^2+b^2+c^2) = f(a)^2+f(b)^2+f(c)^2$ for all positive integers $a$, $b$, and $c$, then $f$ is an identity function.
Simple proofs for universal binary Hermitian lattices
Poo-Sung Park
Mathematics , 2008,
Abstract: If a positive definite Hermitian lattice represents all positive integers, we call it universal. Several mathematicians, including the author, found 25 universal binary Hermitian lattices. But their ad hoc proofs are complicated. We give simple and unified proofs.
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