• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.8
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• pp.3976-3982
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• 2013

This paper presents a temperature analysis of the chaotic behavior in the voltage controlled CMOS chaotic circuit. The circuit is based on a simple nonlinear function block which is needed for chaotic signal generation. It consists of a NFB (nonlinear function block), a level shifter and non-overlapping two-phase clock for sample and hold. By SPICE simulation, chaotic dynamics such as frequency spectra and bifurcations according to the temperature variations were analyzed. And, it was showed that the circuit can generate discrete chaotic signals within control voltage in the range from 1.2 V to 2.3 V in a specific temperature condition of $25^{\circ}C$.

• Korean Journal of Materials Research
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• v.14 no.11
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• pp.769-774
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• 2004

15 nm-Co/15 nm-Ni/P-Si(100)[Type I] and 15 nm-Ni/15 nm-Co/P-Si(100)(Type II) bilayer structures were annealed using a rapid thermal annealer for 40sec at $700/sim1100^{\circ}C$. The annealed bilayer structures developed into composite NiCo silicides and resulting changes in sheet resistance, composition and microstructure were investigated using Auger electron spectroscopy and transmission electron microscopy. Prepared NiCoSix films were further treated in a sequential annealing set up from $900\sim1100^{\circ}C$ with 30 minutes. The sheet resistances of NiCoSix from Type I maintained less than $7\;{\Omega}/sq$. even at the temperature of $1100{\circ}C$, while those of Type II showed about $5\;{\Omega}/sq$. with the thinner and more uniform thickness. With the additive post annealing, the sheet resistance for all the composite silicides remained small up to $900^{\circ}C$. The proposed NiCoSix films were superior over the conventional single-phased silicides and may be easily incorporated into the sub-0.1 ${\mu}m$ process.

• Proceedings of the Korea Concrete Institute Conference
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• 2009.05a
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• pp.159-160
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• 2009

The application of 40MPa high strength concrete was accepted as a goal for improving durability and reducing column's section in concrete bridge piers. As a result of applying 40MPa high strength concrete, it could be achieved that column diameter and coping height were reduced into 0.6m, 0.4m, respectively. And crack by heat evolution of hydration did not generate, because of a careful quality and curing control of high strength concrete.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2010.06a
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• pp.339-339
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• 2010

Photo-assisted wet chemical etching of GaN thin film was studied using KOH based solutions. A $2{\mu}m-2{\mu}m$ titanium line-and-space pattern was used as a etching mask. It is found that the etching characteristics of the GaN thin film is strongly dependent on the pattern direction by unisotropic property of KOH based solution. When the pattern was aligned to the [$11\bar{2}0$] directions, ($10\bar{1}n$)-facet is revealed constructing V-shaped sidewalls.

• Preventive Nutrition and Food Science
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• v.20 no.1
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• pp.52-59
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• 2015

This study was to investigate the preventive effect of taemyeongcheong (TMC, a Korean traditional health drink) on acetaminophen (APAP, 800 mg/kg BW)-induced hepatic damage in ICR mice. TMC is prepared from Saururus chinensis, Taraxacum officinale, Zingiber officinale, Cirsium setidens, Salicornia herbacea, and Glycyrrhizae. A high dose of TMC (500 mg/kg BW) was found to decrease APAP-induced increases in serum levels of alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase, and lactate dehydrogenase. TMC pretreatment also increased the hepatic levels of hepatic catalase, superoxide dismutase, glutathione peroxidase, and glutathione, and reduced serum levels of the inflammatory cytokines tumor necrosis factor (TNF)-${\alpha}$ and interleukin (IL)-6 in mice administered APAP (P<0.05). TMC (500 mg/kg BW) reduced hepatic mRNA levels of TNF-${\alpha}$, IL-$1{\beta}$, IL-6, COX-2, and iNOS by 87%, 84%, 89%, 85%, and 88%, respectively, in mice treated with APAP (P<0.05). Furthermore, histological observations suggested TMC pretreatment dose-dependently prevented APAP-induced hepatocyte damage. These results suggest that TMC could be used as a functional health drink to prevent hepatic damage.

• 전자공학회논문지 IE
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• v.46 no.4
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• pp.8-15
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• 2009

In this paper, we are indicated CMOS Image sensor circuit SPICE analysis for the Photo Diode and pixel Modeling. We get a characteristic of the photoelectric current using a device simulator Medici and develop the Photodiode model for applying a SPICE simulation. For verifying the result, We compared the result of SPICE simulation with the result of mixed mode simulation about the testing circuit structure consisted photodiode and NMOS.

• Bulletin of the Korean Chemical Society
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• v.35 no.12
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• pp.3601-3608
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• 2014

RGB light emitting ZnSe based nanocrystals: ZnSe (blue), ZnSe:Cu (green) and ZnSe:Mn (red) were synthesized by capping the surface of the nanocrystals with oleic acid. The obtained nanocrystal powders were characterized by using XRD, HR-TEM, ICP-AES, FT-IR, and FT-Raman spectroscopies. The optical properties were also measured by UV/Vis and photoluminescence (PL) spectroscopies. The PL spectra showed broad emission peaks at 471 nm (ZnSe), 530 nm (ZnSe:Cu) and 665 nm (ZnSe:Mn), with relative PL efficiencies in the range of 0.7% to 5.1% compared to a reference organic dye standard. The measured average particle sizes from the HR-TEM images for those three nanocrystals were 4.5 nm on average, which were also supported well by the Debye-Scherrer calculations. The elemental compositions of the ZnSe based nanocrystals were determined by ICP-AES analyses. Finally, the drawn CIE diagram showed the color coordinates of (0.15, 0.16) for ZnSe, (0.22, 0.57) for ZnSe:Cu, and (0.62, 0.35) for ZnSe:Mn respectively, which were fairly well matched to that of the RGB color standards.

• Journal of Veterinary Clinics
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• v.34 no.4
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• pp.304-306
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• 2017

A 3-year-old Thoroughbred mare was referred to J&C Equine Hospital with gestation day 30 twin pregnancy. On transrectal ultrasonographic examination, two similar sized (28 mm) embryonic vesicles, unilaterally fixed in the uterine horn, were detected. Transvaginal ultrasound-guided aspiration (TUGA) was performed for reduction of one embryonic vesicle. Yolk sac and allantoic cavity fluids from one embryonic vesicle were aspirated by a needle guided by using transvaginal ultrasound. The mare continued normal singleton pregnancy after twin reduction and delivered a foal successfully. This is the first case described the clinical use of TUGA in Korea. Clinical use of TUGA in twin reduction after embryonic fixation is recommended for equine clinicians.

• Journal of Korean Critical Care Nursing
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• v.3 no.1
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• pp.15-28
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• 2010

Purpose: This study was conducted to explore and compare the level and type of nursing ethical values according to career and nursing units of clinical nurses, Methods: The subjects were 944 nurses working in General Hospital in Seoul and the data were collected from March 8 to August, 2007 using the nursing ethical values questionnaire, The collected data were analyzed using SPSS WIN 10.0 program. Results: The results were as follows; The level of clinical nurses' ethical values were significantly different according to career and nursing units (p<.01) and it was found that most clinical nurses had deontological ethics in the areas of professional nursing domain ($2.77{\pm}.31$), cooperative relations domain ($2.90{\pm}.26$) and customer relation domain ($3.03{\pm}.32$). but that they had utilitarian ethics in human life domain ($2.53{\pm}.32$). Conclusion: Different approaches are needed to develop to establish clinical nurses' ethical values based on career, characteristics of nursing unit and various clinical situations.

• The Journal of Korean Medicine
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• v.15 no.2 s.28
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• pp.373-396
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• 1994

The studies look at the causes, pathology, symptom, diagnosis, treatment of rheumatoid arthritis in the sight of east-western medicine. Following are the results : 1. Rheumatoid arthritis korean-medically belongs to symptom such as Bi(痺), Poung Bi(風痺), Tong Poung(痛風), Youk Jeol Poung(歷節風), Bak Hoe Poung(白虎風), Bak Hoe Youk Jeol Poung(白虎歷節風), etc. 2. The causes of Rheumatoid arthritis are endopathic and exopathic : endopathically it tis related to Chil Jeong(七情) and visceral imbalance, and exopathically it is related to Euk Eum (六淫) and environmental factors. 3. To figure out rheumatoid arthritis, we need to diagnose first the joint symptom and the general body condition, we need about 6 weeks to get the exact decision after the serologic test, the immune and inheritance test, the synovium test. 4. There are four kinds of treatments for rheumatoid arthritis : medicin, acupucture and moxibustion, suction cup and purging away the blood, physical therapy. Cheong Eol So Bi(淸熱消痺) can be used for the acute stage and Jang Bu Seong Shai(臟腑盛衰) is to be considered for the chronic stage. 5. Rheumatoid arthritis should be constantly treated to prevent the patient from the deformity of joint complication.