• 한국전산유체공학회:학술대회논문집
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• 2011.05a
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• pp.592-595
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• 2011

A numerical investigation on a suction vortices, free vortices and subsurface vortices behavior in the model sump system with multi-intakes is performed A test model sump and piping system were designed based on Froude similitude for the prototype of the recommended structure layout by HI-9.B Standard for Pump Intake Design of the Hydraulic Institute. A numerical analysis of three dimensional multiphase flows through the model sump is performed by using the finite volume method of the CFX code with multi-block structured grid systems. A ${\kappa}-{\omega]$ ShearStressTransportturbulencemodelandthe Rayleigh-Plesset cavitation model are used for solving turbulence cavitating flow. From the numerical analysis, several types of vortices are reproduced and their formation, growing shedding and detailed vortex structures are investigated. To reduce abnormal vortices, an anti-vortex device is considered and its effect is investigated and discussed.

• Archives of Plastic Surgery
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• v.36 no.4
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• pp.481-484
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• 2009

Purpose: Cleidocranial dysostosis is a rare hereditary disorder affecting bones that develop by intramembranous formation. The typical features include excessive growth of transverse diameter of the skull, hypoplastic clavicles, low height and characteristic facial features. Methods: A 28 years old female patient visited by frontal area depression. The diagnosis was performed by computed tomographic study and radiographic imaging. The patient has widely opened anterior fontanelle, partial fused metopic suture, multiple wormian bone and supernumenary impacted teeth. Under the coronal incision, we exposed depressed frontal area and corrected with Medpor block carving. Results: Postoperatively, frontoparietal skull was aestheticlly improved and she was satisfied with the results. Conclusion: Authors report a case of cleiodocranial dysostosis who has been done correction of abnormal skull shape by Medpor$^{(R)}$ insertion.

• Korean Journal of Microbiology
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• v.40 no.3
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• pp.254-256
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• 2004

Polymerase chain reaction (PCR) is a powerful tool for precisely amplifying selected DNA sequences that have had a broad impact on genomic studies. When examining human $\alpha$- and $\beta$- tryptase genes which have 95% DNA homology, inconsistent PCR amplification of genomic sequences hampered our progress. This study suggests that long PCR technique on the original DNA digested with restriction enzymes improves both efficiency and sensitivity of PCR. These improved results seem to derived from the effective denaturation of the original genomic DNA template or reduction of formation of secondary structures that block either primer annealing or extension in PCR. Elimination of homo- or hetero-duplex products derived from highly homologous genes provides an additional advantage in this study. This communication describes how the use of restriction enzymes improved these efficiencies, and also facilitated studies of highly homologous genes including tryptase genes.

• The Korean Journal of Pain
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• v.1 no.1
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• pp.3-8
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• 1988

Authors have experienced the treatment for the uppermost frequent cases, herpes zoster, frozen shoulder and low back pain among those who visited our pain clinic. 1. Herpes zoster The Patients who received the treatment within 4 weeks of the onset of the disease, not only healed herpes without leaving post herpetic neuralgia but also crust formation was fast. 2. Frozen shoulder Over 90% of the patients who received suprascapular nerve block accompanied with trigger points electric stimulation was very efficient procedure, futhermore, authors felt keenly the necessity each patients co-operation and individual endurance for this treatment. 3. Low back pain An epidural steroid administration to the patients who did not have any organic disturbances was effective treatment. If this non-effective, search other cause of the disease or operation was advisable one.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.19 no.3
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• pp.319-331
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• 1997

The purpose of this study was to evaluate the bone-forming capacity of the periosteum in calvaria of rats. The experiment was carried out in 49 rats. We exposed the calvaria and made 1㎝ diameter round full thickness defect at both sides of calvaria. In the left calvarial bone serving as control, the periosteum was removed after implantation of block, while in the right calvarial bone the periosteum remained intact as an experimental site. The histologic examination of bone response was performed after 1-, 2-, 4-, 6-,8-, 12-, 24-week implantation in calvaria of rats. We could observe the periosteal preservation favorably influenced the bone formation.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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• 2004.11a
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• pp.40-44
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• 2004

A fact that limits a company's ability to achieve more of its goal is referred to as a 'constraint' shipbuilding industries need to identify and manage constraints. The theory of constraints is evolved out of the problems of bottleneck formation. This happens and is conserved for the formulation if various real time problems for arriving standard uniquely addressed problems If, for example, the goal of a shipbuilding industry is to make money now and in the future, it is suggested that TOC will enable th mangers of the company to do so. TOC, focuses the organization scare resources on improving the performance of the true constraints, and therefore the bottom line of the organization. An attempt is made for the implantation of the theory into real world shipyard decision support mechanism.

• YAKHAK HOEJI
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• v.43 no.6
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• pp.802-808
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• 1999

Vibrio vulnificus cytolysin has been incriminated as one of the important virulence determinants in V. vulnificus infection. In the present study, the effects of Vibrio vulnificus cytolysin on platelets were examined. Vibrio vulnificus cytolysin induced platelet aggregation and increased intracellular calcium concentration ($[Ca^{2+}]_i$) of rat platelets. These effects were abolished in $Ca^{2+}-free$ buffer (2 mM EGTA). Cytolysin also potentiated ADP-and collagen-induced platelet aggregation. Lanthanum (2 mM) inhibited cytolysin-diduced platelet aggregation. However, another $Ca^{2+}$ channel blockers, verapamil ($20{\;}{\mu}M$) or mefenamic acid ($20{\;}{\mu}M$) did not block cytolysin-induced platelet aggregation. Osmotic protectants, sucrose (50 mM) and raffinose (50 nM) suppressed platelet aggregation by 35.9% and 63.4%, respectively. V. vulnificus cytolysin increased membrane conductances of platelet membranes. These results suggest that cytolysin-induced platelet aggregation is mediated via lanthanum sensitive-calcium influx which resulted from the pore formation by V. vulnificus cytolysin.

• Carbon letters
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• v.9 no.1
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• pp.28-34
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• 2008

Multidirectional reinforcement is aimed primarily at overcoming interlaminar weakness, hence a major interest lies in the mechanical properties of multidirectional carbon/carbon composites. Mechanical properties depend on the type of carbon fiber, the size of the fiber bundle, the spacing of the bundles, the angles of the bundles relative to the axes of the block, and matrix formation. In the present studies, PAN based carbon fiber preforms manufactured different size of unit cell have been prepared. Densification of these used high pressure infiltration and carbonization technique with coal tar pitch as matrix precursor was carried out. Scanning electron microscopy has been used to study the fracture behavior of composites. The size of unit cell of the preforms has considerably affected on the flexural properties as well as microstructure of the carbon/carbon composites.

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2006.09a
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• pp.525-526
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• 2006

Calcium-hexaluminate phase $(CA_6)$ is known to be effective for the crack shielding due to the spinel block crystal structure. In this study, we focused to the control of $CA_6$ morphology for good damage tolerance behavior in alumina and zirconia/calcium-hexaluminate $(CA_6)$ composites. Calcium-hexaluminate $(CA_6)$ composites were prepared from zirconia, alumina and calcium carbornate powders. Calcium-hexaluminate $(CA_6)$ phase was obtained by the solid reaction through the formation of intermediate phase $(CA_2)$. $CA_6$ phase showed the column type abnormal grain grown behavior composed of small blocks. Due to the typical microstructure of $CA_6$, alumina and zirconia/calcium-hexaluminate composites provide a well controlled crack propagation behavior.

• The Korean Journal of Pain
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• v.20 no.1
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• pp.74-77
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• 2007

The trigger point injection technique is widely used in pain clinics for the treatment of acute and chronic pain. Yet it has a variety of complications such asvasovagal syncope, total spinal anesthesia, paralysis, root block, pneumothorax, needle breakage, skin infection, and hematoma formation. Among them, the simultaneous occurrence of psoas and epidural abscesses is extremely rare. We report here on a patient who was diagnosed with epidural and psoas abscesses after paravertebral trigger point injection.