1,204 research outputs found
Laminar burning velocity predictions by meso-scale flames in an annular diverging tube
No full textFlame behavior in an annular diverging tube (ADT) consisting of an outer quartz tube and a tapered inner core column was investigated as a basic model for small combustion devices of various combustion space scales. Flames can be stabilized at suitable locations where the mean flow velocity is matched to the spatial average propagation velocity (SAPV). Transient variations of wall temperature and the SAPV were compared for various experimental parameters: inner core materials, burner configurations, and flow rates. It was found that a critical propagation velocity (CPV) exists that is least affected by the flow rates. The CPVs of methane, propane, and dimethyl ether (DME) were measured and a good agreement was shown between the measured CPVs and the laminar burning velocities presented in the literatures. Therefore, the ADT method can be a model for small combustion devices of various combustion space scales; furthermore, this study can be beneficial in designing and operating small combustion devices. The ADT method can also be applied in the field for in situ monitoring of the burning velocities. (C) 2011 Elsevier Ltd. All rights reserved
Author Correction: Evaluation of skin cancer resection guide using hyper‑realistic in‑vitro phantom fabricated by 3D printing
No full textThe original version of this Article contained an error in the spelling of the author Taehun Kim which was incorrectly given as Teahun Kim. The original Article has been corrected
Paratachycines ussuriensis Storozhenko 1990
No full text<i>Paratachycines ussuriensis</i> Storozhenko, 1990 <p> <i>Paratachycines ussuriensis</i> Storozhenko, 1990: 844 (Russia: Ussuri); Kostia, 1996: 107; Kim & Kim, 2002: 147; Storozhenko, 2004: 186; Storozhenko & Paik, 2007: 88; Paik et al. 2010: 10.</p> <p> <b>Specimens examined (6</b> Ƥ <b>). <Gangwon-do></b> Kum-gang san, near Hotel Go-song, 5-8 viii 1975, J. Papp & A. Vojnits (No. 327).</p>Published as part of <i>Kim, Tae-Woo & Puskás, Gellért, 2012, Check-list of North Korean Orthoptera Based on the Specimens Deposited in the Hungarian Natural History Museum, pp. 1-27 in Zootaxa 3202</i> on page 8, DOI: <a href="http://zenodo.org/record/280175">10.5281/zenodo.280175</a>
A note on Kim-Ma characterization of the Hilbert ball
No full textThis is an open access article under the CC BY license.[No abstract available]Kortney Rose Foundation, KRF, (2002-070-C00005); National Research Foundation of Korea, NRF* Corresponding author. E-mail addresses: [email protected] (K.-T. Kim), [email protected] (D. Ma). 1 Research supported in part by the grant KRF 2002-070-C00005 from The Korea Research Foundation
Modeling Safety-II based on unexpected reactor trips
No full textSafety-I is defined as a state where as few things as possible go wrong. Until now, the methods for analyzing the safety in nuclear power plants (NPPs), i.e., Probabilistic Safety Assessment and Deterministic Safety Analysis, have been developed from the perspective of Safety-I. However, focusing solely on Safety-I may miss opportunities to 1) learn from successes, and 2) observe how human adaptation contributes to successful outcomes, despite novel circumstances and resource limitations. In this light, a paradigm shift from ensuring that "as few things as possible go wrong (Safety-I)" to ensuring that "as many things as possible go right (Safety-II)" has been suggested. This study aimed to develop a model of Safety-II for unexpected situations in NPPs. Safety-II concentrates on the conditions in which as many things as possible go right. First, this study suggested and characterized a qualitative Safety-II model, which was modified from a resilience model developed by the Electricite de France (EDF). Second, event reports from unplanned reactor trips at Korean NPPs were analyzed based on the elements of this characterized Safety-II model as well as event severity. Third, a quantitative network model of Safety-II was developed by performing a correlation analysis. Finally, a feasibility analysis of Safety-I and Safety-II concepts for explaining event severity was performed. The result of this research suggests a new methodology for the safety assessment of unexpected reactor trips in NPPs, which could complement the conventional probabilistic safety assessments and deterministic safety analyses. (C) 2018 Elsevier Ltd. All rights reserved.
Diestrammena unicolor Brunner
No full textDiestrammena unicolor Brunner von Wattenwyl, 1888 Diestrammena unicolor Brunner von Wattenwyl, 1888: 299 (Russia: Vladivostok); Kostia, 1996: 106; Kwon et al. 1996: 103; Kim & Kim, 2002: 144; Storozhenko, 2004: 183; Storozhenko & Paik, 2007: 86; Paik et al. 2010: 9. = Diestrammena goliath Bey-Bienko, 1929: 545 (Japan); Sohn, 1957: 15; Sohn, 1963: 2. [a synonym by Storozhenko, 1990] Specimens examined (13 Ƥ ). Mt. Myohyangsan 12 ix 1980, L. Forró & Gy. Topál; Mt. Myohyangsan Hotel Myohyang, 13 ix 1980, L. Forró & Gy. Topál (No. 663); Kum-gang san, near Hotel Go-song, 4 viii 1975, J. Papp & A. Vojnits (No. 315); Kum-gang san, near Hotel Go-song, 5-8 viii 1975, J. Papp & A. Vojnits (No. 327); Mt. Pakyon Pakyon pokpo 27 km NE from Kaesong 500 m, 9 ix 1971, S. Horvatovich & J. Papp (No. 250).Published as part of Kim, Tae-Woo & Puskás, Gellért, 2012, Check-list of North Korean Orthoptera Based on the Specimens Deposited in the Hungarian Natural History Museum, pp. 1-27 in Zootaxa 3202 on page 8, DOI: 10.5281/zenodo.28017
Double-Layer Buffer Template to Grow Commensurate Epitaxial BaBiO3 Thin Films
No full textWe propose a BaCeO3/BaZrO3 double-layer buffer template, grown on a SrTiO3 substrate, for epitaxial growth of a target oxide film with large lattice constants of over 4.1 . Lattice mismatch from the substrate was mostly accommodated for by a BaZrO3 arbitrating layer. Having an ideal in-plane lattice structure, BaCeO3 served as the main-buffer to grow the target material. We demonstrated commensurate epitaxy of BaBiO3 (BBO,a = 4.371 ) utilizing the new buffer template. Our results can be applied to heteroepitaxy and strain engineering of novel oxide materials of sizable lattice constants. © Author(s) 20161421sciescopu
Three-dimensional particle tracking velocimetry for turbulence applications
No full textThree-dimensional particle tracking velocimetry (3D-PTV) is a flow measure- ment technique that tracks the Lagrangian paths of a set of particles using photogrammetric principles. This technique allows to investigate complex fluid flows by measuring velocity and acceleration along particle trajectories. Implementing and optimizing the technique is, however, a somewhat di - cult task involving accurate optical set-up, volumetric illumination, precise calibration and rigorous post-processing.
This thesis explains thorough guidelines to accomplish an optimal system set-up by discussing the hardware configuration, software operation, and post processing methods. First, this paper describes the system background for an e cient experimental set-up, such as the required camera specification, an accurate calibration method, an appropriate type of tracer particles and the illumination source. Then, the detailed usage of the 3D-PTV software, including the compilation and operation, with a description of file structures are discussed. To further utilize the output data, post-processing methods developed by Dr.Alex Liberzon, Dr.Beat Luthi and the author, which in- terpret the data both in Eulerian and Lagrangian frames, are explained. A circular jet flow is analyzed as demonstration of the technique.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2017-08-01The student, Jin Tae Kim, accepted the attached license on 2015-06-05 at 14:59.The student, Jin Tae Kim, submitted this Thesis for approval on 2015-06-05 at 15:06.This Thesis was approved for publication on 2015-06-09 at 13:17.DSpace SAF Submission Ingestion Package generated from Vireo submission #8268 on 2015-09-29 at 15:05:09Made available in DSpace on 2015-09-29T21:02:48Z (GMT). No. of bitstreams: 2
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Additive-Free Gelation of Graphene Oxide Dispersions via Mild Thermal Annealing: Implications for 3D Printing and Supercapacitor Applications
No full textHerein, a mild thermal annealing (MTA) process is presented for additive-free gelation of graphene oxide (GO) dispersions. This process transitions the GO from a nematic liquid crystal phase to a random network structure, significantly enhancing its rheological properties by order of magnitude. This transition is facilitated by the diffusion of functional groups on the GO surface, which induces hydrophobic attractions, leading to a stable network structure. Employing rheo-SAXS experiments, detailed insights are provided into the microstructural changes of GO gel under shear stress, establishing a direct correlation between its rheological behavior and microstructure. The distinctive properties of MTA-processed inks are illustrated, seamlessly integrating with 3D printing, to yield a highly porous lattice structure that demonstrates promising potential as a supercapacitor electrode. The MTA process, an additive-free approach to gelation, maintains the inherent dispersion properties of GO while offering scalability. Thus, this method brings significant economic and environmental advantages compared to conventional gelation techniques. The findings not only advance the fundamental understanding of 2D colloidal network gels but also increase the potential of GO for a wide range of applications, from gas and liquid absorbers to electrodes for energy storage and conversion, and biomedical fields.N
Selective detection of estradiol using a molecularly imprinted self-assembled monolayer on gold surface
No full textMolecularly imprinted polymer (MIP) was synthesized to selectively detect estrogen-like chemicals depending on their shapes and binding characteristics to Estrogen Receptor (ER) active site. MIP was synthesized on self-assembled monolayer (SAM) formed by thiol-acrylate photopolymerization on Surface Plasmon Resonance (SPR) chip. The imprinting factor was calculated based on the shift of SPR angle at which the excitation of surface plasmons by light was minimum level. The imprinting factor, 4. 3, was calculated by angle shift by SPR, which showed higher imprinting factor than the previous studies. We also validated the specificity of molecularly imprinted polymer loaded gold chip and compared the binding ability to estrogenicity known by in-vivo and in-vitro biological test. Molecular imprinting reflected the whole surface characteristics including three dimensional shape, types and location of functional groups, and distribution of interaction forces such as hydrogen bonding and van der Waals interaction. Therefore, MIP binding response could provide more insight on structure and estrogenic activity. Another purpose was to provide the basic data for future development of EDC screening array chip to find out various hormone activities at once. © 2009 The Korean Society of Environmental Risk Assessment and Health Science and Springer.
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