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Search Results: 1 - 10 of 26198 matches for " Young Dae Kim "
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Effect of Silane Coupling Agent on the Flexural Property of Glass Fiber Reinforced Composite Film  [PDF]
Hye-Hyun Kim, Si-Young Kim, Dae-Hee Kim, Chae-Young Oh, Nam-Ju Jo
Journal of Materials Science and Chemical Engineering (MSCE) , 2014, DOI: 10.4236/msce.2014.210006
Abstract:

Transparent glass fiber reinforced composites films ware fabricated by UV light induced chemical crosslinking of composite materials consisting of glass fiber and UV curable resin in film state. In order to apply film to flexible device, excellent flexural property is required, then the delamination should not occurred between glass fiber and UV curable resin when film is bent. To minimize delamination and improve the interfacial adhesion at interface between glass fiber and UV curable resin, the γ-aminopropyl triethoxy silane and γ-glycid oxypropyl trimethoxy silane were applied for the surface treatment of glass fibers. Silanization of glass fiber surface was checked by scanning electron microscopy and the degree of delamination of composite film was confirmed through the bending test, ASTEM290-96a, used by haze meter.

Surface-Modified Membrane as A Separator for Lithium-Ion Polymer Battery
Jun Young Kim,Dae Young Lim
Energies , 2010, DOI: 10.3390/en3040866
Abstract: This paper describes the fabrication of novel modified polyethylene (PE) membranes using plasma technology to create high-performance and cost-effective separator membranes for practical applications in lithium-ion polymer batteries. The modified PE membrane via plasma modification process plays a critical role in improving wettability and electrolyte retention, interfacial adhesion between separators and electrodes, and cycle performance of lithium-ion polymer batteries. This paper suggests that the performance of lithium-ion polymer batteries can be greatly enhanced by the plasma modification of commercial separators with proper functional materials for targeted application.
Enantioselective Michael addition of 2-hydroxy-1,4-naphthoquinones to nitroalkenes catalyzed by binaphthyl-derived organocatalysts
Saet Byeol Woo,Dae Young Kim
Beilstein Journal of Organic Chemistry , 2012, DOI: 10.3762/bjoc.8.78
Abstract: The highly enantioselective Michael addition of 2-hydroxy-1,4-naphthoquinones to nitroalkenes, promoted by binaphthyl-modified chiral bifunctional organocatalysts is described. This reaction afforded the chiral functionalized naphthoquinones in high yields (81–95%) and excellent enantioselectivities (91–98% ee) under low catalyst loading (1 mol %).
Macroscopic Greenberger-Horne-Zeilinger and W States in Flux Qubits
Mun Dae Kim,Sam Young Cho
Physics , 2007, DOI: 10.1103/PhysRevB.77.100508
Abstract: We investigate two types of genuine three-qubit entanglement, known as the Greenberger-Horne-Zeilinger(GHZ) and W states, in a macroscopic quantum system. Superconducting flux qubits are considered theoretically in order to generate such states. A phase coupling is proposed to offer enough strength of interactions between qubits. While an excited state can be the W state, the GHZ state is formed at the ground state of the three flux qubits. The GHZ and W states are shown to be robust against external flux fluctuations for feasible experimental realizations.
Entanglement and Bell States in Superconducting Flux Qubits
Mun Dae Kim,Sam Young Cho
Physics , 2006, DOI: 10.1103/PhysRevB.75.134514
Abstract: We theoretically study macroscopic quantum entanglement in two superconducting flux qubits. To manipulate the state of two flux qubits, a Josephson junction is introduced in the connecting loop coupling the qubits. Increasing the coupling energy of the Josephson junction makes it possible to achieve relatively strong coupling between the qubits, causing two-qubit tunneling processes even dominant over the single-qubit tunneling process in the states of two qubits. It is shown that due to the two-qubit tunneling processes both the ground state and excited state of the coupled flux qubits can be a Bell type state, maximally entangled. The parameter regimes for the Bell states are discussed in terms of magnetic flux and Josephson coupling energies.
Macroscopic Many-Qubit Interactions in Superconducting Flux Qubits
Sam Young Cho,Mun Dae Kim
Physics , 2007, DOI: 10.1103/PhysRevB.77.212506
Abstract: Superconducting flux qubits are considered to investigate macroscopic many-qubit interactions. Many-qubit states based on current states can be manipulated through the current-phase relation in each superconducting loop. For flux qubit systems comprised of $N$ qubit loops, a general expression of low energy Hamiltonian is presented in terms of low energy levels of qubits and macroscopic quantum tunnelings between the many-qubit states. Many-qubit interactions classified by {\em Ising type- or tunnel-}exchange interactions can be observable experimentally. Flux qubit systems can provide various artificial-spin systems to study many-body systems that cannot be found naturally.
Double primary malignancies associated with colon cancer in patients with situs inversus totalis: two case reports
Young Kim, Hoon Ryu, Dae Kim, Ik Kim
World Journal of Surgical Oncology , 2011, DOI: 10.1186/1477-7819-9-109
Abstract: A 66-year-old male with SIT was referred for a two-month history of hematochezia. Synchronous colonic tumors were found on the proximal transverse and sigmoid colon. The patient underwent open total colectomy and was discharged without incident. A 71-year-old female with rectosigmoid colon cancer and SIT underwent laparoscopy-assisted low anterior resection. Fourteen months after the surgery, the patient developed a single hepatic metastasis and underwent hepatic segmentectomy (S6). Forty-six months after laparoscopy-assisted low anterior resection, the patient developed metachronous early gastric cancer on the antrum and underwent radical subtotal gastrectomy with gastroduodenostomy. The patient is doing well without recurrence for 28 months.The anatomical arrangement of human organs is described by three categories: situs solitus, situs inversus, and situs ambiguus. Situs solitus indicates the normal arrangement of the heart and intra-abdominal organs. Situs inversus is a rare congenital deformity and is classified as either situs inversus totalis (SIT) or partial situs inversus. Unlike partial situs inversus, in cases of SIT, the left and right aspects of the thoracic and intra-abdominal organs are inverted like a mirror image [1]. Situs ambiguus refers to disorderly arranged thoracic and abdominal organs unlike the features of situs solitus and situs inversus [2]. The incidence rate of SIT is 1 per 10,000-20,000 people [3] and, in a recent Korean study, 5 per 34,723 SIT patients were discovered during colonoscopy [4].Situs inversus itself is not a premalignant condition; however, rare synchronous and metachronous multiple primary gastrointestinal malignancies have been reported in the literature. On review of the Korean literature, one case of synchronous gastric and esophageal cancers in a 49-year-old male with SIT [5] and one case of synchronous esophageal and gastric cancers in a 58-year-old male with situs ambiguus with polysplenia were reported [6]. Herein,
Development of Three Dimensional Automatic Body Fat Measurement Software from CT, and Its Validation and Evaluation  [PDF]
Young Jae Kim, Jun Yong Jeong, Su Youn Nam, Min Ju Kim, Jae Hwan Oh, Kwang Gi Kim, Dae Kyung Sohn
Journal of Biomedical Science and Engineering (JBiSE) , 2015, DOI: 10.4236/jbise.2015.810063
Abstract: Abdominal obesity describes the accumulation of excessive fat in the abdomen. It is known that depending on its distribution, visceral obesity presents a greater danger to health than subcutaneous obesity. To properly prevent and treat visceral obesity, accurate evaluation methods are necessary, and hence quantitative VAT estimation is extremely important. CT scans are the most accurate method for estimating VAT, but it requires a great deal of time and effort, limiting its use in studying or evaluating obesity in patients. This paper proposed automatic measurement software that could quickly differentiate between and measure VAT and SAT. The method was verified using a total of 100 abdominal CT data values; this paper measured the SAT and VAT in the entire abdomen using the automatic measurement software. Additionally, through a comparative evaluation between the automated measurements and manual measurements such as BMI and waist circumference, clinical reliability and viability were validated and evaluated. Between automated measurements and manual measurements, the TAT (r = 0.995, p = 0.01), SAT (r = 0.987, p = 0.01) and VAT (r = 0.993, p = 0.01) showed high correlation. Using BMI as the main metric, the TAT for automated measurements (r = 0.674, p = 0.01) and the TAT for manual measurements (r = 0.703, p = 0.01) showed the strongest correlation. When using waist circumference, the VAT for automated measurements (r = 0.826, p = 0.01) and the VAT for manual measurements (r = 0.822, p = 0.01) showed the strongest correlation. With these results, the reliability and viability of the automatic measurement software were confirmed. The software is expected to help greatly in reducing the time and in providing objective data of VAT measurements from CT scans for clinical research.
Enantioselective Michael Addition of 3-Aryl-Substituted Oxindoles to Methyl Vinyl Ketone Catalyzed by a Binaphthyl-Modified Bifunctional Organocatalyst
Hyun Joo Lee,Saet Byeol Woo,Dae Young Kim
Molecules , 2012, DOI: 10.3390/molecules17067523
Abstract: The enantioselective conjugate addition reaction of 3-aryl-substituted oxindoles with methyl vinyl ketone promoted by binaphthyl-modified bifunctional organocatalysts was investigated. The corresponding Michael adducts, containing a quaternary center at the C3-position of the oxindoles, were generally obtained in high yields with excellent enantioselectivities (up to 91% ee).
Concurrent sternal and pulmonary foci of Langerhans cell histiocytosis
Koh Young,Moon Hyeon,Kim Byung-Su,Han Dae
Annals of Thoracic Medicine , 2010,
Abstract:
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