• Journal of the Korea Institute of Information Security & Cryptology
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• v.26 no.6
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• pp.1431-1441
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• 2016

In case of ARX based block cipher algorithms with masking countermeasures, there is a need for a method to convert between Boolean masking and arithmetic masking. However, to apply masking countermeasures to ARX based algorithms is less efficient compared to masked AES with single masking method because converting between Boolean and arithmetic masking has high computation time. This paper shows performance results on 32-bit platform implementations of LEA with various masking conversion countermeasures against first order side channel attacks. In the implementation point of view, this paper presents computation time comparison between actual measurement value and theoretical one. This paper also confirms that the masked implementations of LEA are secure against first order side channel attacks by using a T-test.

• Journal of the East Asian Society of Dietary Life
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• v.1 no.1
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• pp.17-29
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• 1991

The Hong's-Zu-Bang-Moon, although it is not know when and by whom it was written, is estimated to have written in the middle of 1800, but has not been published yet. In general, other cooking books in Yi's Dynasty were on the cooking methods of a variety of foods. But the book deals solely with brewing, which is the trait of it. The book comprises a total of 36 items, among which So-Gog-Ju wine was excluded because only a part of it was recorded. Another item deleted, written vaguely and difficult to understand was, on a closer analysis of its content, 'Song-Soon-Ju wine'. According to the analysis of this book, the cereals used for brewing were 59 percent of regular rice and 41 percent of sticky rice including other 12 kinds of special materials. As for the processes, the precesses using Jee-Ae-Bop was dominant. The processing technique whose special words and expressions were analyzed in this study, were divided into 18 preparation methods, 45 processing ones, and 7 heating ones. The temperature processing whose expressions were analyzed here were divided into 6 cooking processes, 7 medium ones and 3 heating ones. The measurement unit of 'Doe' was most often used. It tried to show relatively accurate measurements but showed just approximate ones. There were 19 kinds of brewing utensis. Urns were most often used, but it was impossible to discern and kind. As for the tast of the wines, the writer showed his subjective expressions. The margianal point in this study is that it was very difficult to interpret the book. The closing up of twings of on azaled over the urn had no scientific base but said something of korean folkways at that times.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.43 no.3
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• pp.231-237
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• 2017

This study was performed to cytotoxicity, tyrosinase inhibition activity, intracellular melanin contents to verify the whitening effect of fraction from Glycine soja Siebold et Zucc. (G. soja). Using western blotting, tyrosinase expression in B16F10 melanoma cells and expression levels of tyrosinase related protein-1 (TRP-1) and protein-2 (TRP-2) were examined. As a result, all of the fractions showed a high cell viability over 82% at the concentrations of 0.125, 0.25, 0.5, 2.0 mg/mL. When the whitening effects of fractions from G. soja were tested using B16F10 melanoma cells treated with the ${\alpha}$-melanocyte stimulating hormone (${\alpha}-MSH$), the EtOAc fractions inhibited tyrosinase and melanogenesis effectively. The result of protein expression measurement using western blot showed that TRP-1, TRP-2 and tyrosinase protein expression in B16F10 melanoma cells treated with extracts decreased. Therefore, it is concluded that the fractions from G. soja have whitening effect by inhibiting protein related melanogenesis.

• Journal of the Korean Institute of Telematics and Electronics
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• v.22 no.6
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• pp.34-40
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• 1985

Characteristics of GaAE epilayers grown on (100) CaAs wa(tors by molecular beam epitaxy (MBE) under various single crystal growing conditions were investigated. In fabrica-ting GaAs, epilayer by MBE, the most important factors are a substrate temperature(ts) and a flux density ratio (As/Ga). In this experiment, the substrate temperature was varied in the range of 48$0^{\circ}C$ to $650^{\circ}C$ and As and Ga cell temperatures were varied in the range of 218$^{\circ}C$ to 256$^{\circ}C$ and 876$^{\circ}C$ to 98$0^{\circ}C$, respectively. At the substrate temperature of 54$0^{\circ}C$, As cell temperature of 23$0^{\circ}C$, and Ga cell temperature of 91$0^{\circ}C$, the As/Ga ratio was 5"10, the surface morphology was most smooth . Investigation of As-stabilized surface by RHEED and of depth profile by SIM5 showed that As is less stable than Ga. Also, X-ray diffraction measurement revealed that single crystals of (400) and (200) were formed at the both sub-strate temperatures of 52$0^{\circ}C$ and 54$0^{\circ}C$.TEX>.

• Journal of Korean Academy of Nursing
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• v.35 no.7
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• pp.1295-1303
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• 2005

Purpose: This study was to determine the effects of abdominal breathing training using biofeedback on stress, immune response, and quality of life. Method: The study design was a nonequivalent control group pretest-posttest, quasi-experimental design. Twenty-five breast cancer patients who had completed adjuvant chemotherapy were enrolled. The experimental group(n=12) was provided with abdominal breathing training using biofeedback once a week for 4 weeks. State anxiety, cancer physical symptoms, serum cortisol, T cell subsets(T3, T4, T8), NK cell and quality of life were measured both before and after the intervention. Result: Though state anxiety, cancer physical symptoms, and serum cortisol were reduced after 4 weeks of abdominal breathing training using biofeedback, there was no statistical significance. It showed, however, improvement in quality of life (p=.02), and T3(p=.04). Conclusion: Abdominal breathing training using biofeedback improves quality of life in breast cancer patients after a mastectomy. However, the mechanism of this beneficial effect and stress response requires further investigation with special consideration in subject selection and frequency of measurement. Nurses should consider this strategy as a standard nursing intervention for people living with cancer.

• Journal of the Korean earth science society
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• v.30 no.4
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• pp.513-526
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• 2009

It has long been that the unit of oceanic salinity changed from permil (%o) to other unit. However, the middle-and high- school textbooks of science and earth science have still used %o as salinity unit that was defined a long time ago. The objectives of this study are to briefly discuss about the historical development of change in salinity unit and measurement techniques, to present differences between the salinity units of psu (practical salinity unit) and %o, and to address the need and validity for the correction of salinity unit in the textbooks. Twenty-seven kinds of textbooks based on the 7th National Curriculum were analyzed to investigate the expression of salinity unit and the definition of salinity. The results were compared with the usage of salinity units in the articles published in Journal of Korean Society of Oceanography from 1967 to 2008. The percentages by the use of %o were 96.3% in the text and 83.8% in the graphs or tables of the textbooks. By contrast, the scientific papers began to use psu from 1994 and then %o has seldom been used since 2004.

• Analytical Science and Technology
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• v.17 no.6
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• pp.443-453
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• 2004

Toluene is currently used as a major organic solvent of glues which are abused by the youngster for its hallucinogenic effect. In this study, toluene determination method using headspace gas chromatography (HS-GC) in the biological fluids like blood, urine and saliva of glue sniffers was validated and related uncertainties were estimated. LOD of $0.01{\mu}g/mL$ in saliva and LOQ of $0.1{\mu}g/mL$ in blood were the highest among LODs and LOQs in urine, blood and saliva. Other performance characteristics such as linearity, working range, accuracy, precision and recovery were also measured. The uncertainty at toluene concentration of $1{\mu}g/mL$ was estimated to be 0.13, 0.09 and $0.17{\mu}g/mL$ for blood, urine and saliva, respectively, and the uncertainty contribution from the least linear regression was dominant at the lower concentration of toluene.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.7 no.6
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• pp.1302-1307
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• 2006

This study describes the preparation of high-performance photocatalyst and its environmental applications. We prepared visible-light response nano-particle photocatalyst exhibiting the similar photocatalytic activity with $TiO_2$, dispersed $TiO_2$ on $SiO_2$ with an active rutile type titanium oxide prepared at low temperature. The binder and stable photocatalytic $TiO_2$ sol for photocatalytic system were also prepared. Such products were evaluated by UV/Vis spectrometer, X-ray diffraction analysis, SEM, measurement of photocatalytic activities and surface area, mechanical properties of $TiO_2$-coated surfaces. The results obtained can be applied in efficient photocatalytic systems using POF and metal plate for the purification of air.

• Parasites, Hosts and Diseases
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• v.49 no.3
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• pp.229-234
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• 2011

In order to assess changes in the activity of immunecompetency present in Crassostrea gigas infected with Marteilioides chungmuensis (Protozoa), the total hemocyte counts (THC), hemocyte populations, hemocyte viability, and phagocytosis rate were measured in oysters using flow cytometry. THC were increased significantly in oysters infected with M. chungmuensis relative to the healthy appearing oysters (HAO) (P<0.05). Among the total hemocyte composition, granulocyte levels were significantly increased in infected oysters as compared with HAO (P<0.05). In addition, the hyalinocyte was reduced significantly (P<0.05). The hemocyte viability did not differ between infected oysters and HAO. However, the phagocytosis rate was significantly higher in infected oysters relative to HAO (P<0.05). The measurement of alterations in the activity of immunecompetency in oysters, which was conducted via flow cytometry in this study, might be a useful biomarker of the defense system for evaluating the effects of ovarian parasites of C. gigas.

• Horticultural Science & Technology
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• v.33 no.1
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• pp.133-142
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• 2015

This study aimed to identify the exercise intensity associated with four common physical activities for adults (running, skipping rope, walking, and muscle strength exercises) and two horticultural activities (creating a vegetable bed and garden maintenance). For this experiment, 19 males (mean age: $25.8{\pm}2.3$ years) randomly participated in the activities at a glasshouse at Konkuk University. Each of the six activities lasted for 5 minutes; the subjects rested for 5 minutes during intervals between the activities. A portable metabolic analyzer was used to store the oxygen and energy consumption values obtained upon measurement of each activity. In addition, a wireless heart rate monitor was used to measure the subjects' heart rate. According to the results, the four types of physical activities and two horticultural activities carried out by the subjects are moderate- to high-intensity activities [i.e., $3.8{\pm}0.9$ to $9.9{\pm}2.1$ metabolic equivalents (METs)]. Running ($9.9{\pm}2.1$ METs) and skipping rope ($8.8{\pm}2.2$ METs) were categorized as high-intensity physical activities, whereas creating a vegetable bed ($5.0{\pm}1.2$ METs), walking ($4.9{\pm}0.8$ METs), muscle strength exercises ($4.5{\pm}1.3$ METs), and garden maintenance ($3.8{\pm}0.9$ METs) were classified as moderate-intensity physical activities. The exercise intensities of horticultural activities in this study were similar to those of walking and muscle strength exercises. Therefore, participating in these horticultural activities is expected to garner health benefits similar to those reaped from the physical activities described in the current study.