Background: Push-up are effective exercises for shoulder stability. Previous studies have documented the effects of support plane and hand position and width on muscle activities during a push-up. Objects: This study aimed to investigate the changes in muscle activities in the upper extremity when performing the standard and the knee-flexed push-up with different hand shapes. Methods: A total of twenty-six healthy males participated in this study. Three different hand shapes (finger abduction, finger adduction, and fists) and two types of push-up posture (standard and knee-flexed push-up) were set as the independent variables. Electrograms were used to measure the muscle activity of the upper trapezius (UT), triceps brachii (TB), pectoralis major (PM), and serratus anterior (SA). Each participant performed the randomly assigned push-up to the sound of the metronome. The mixed-effect linear regression model was used to detect the changes in muscle activities after changing the hand shape and push-up posture. Statistical significance was set at α = 0.05. Results: The UT muscle activity was statistically significantly higher when performing push-up with fists than finger abduction (p = 0.035) or finger adduction (p = 0.044). During the standard push-up, the muscle activity in all muscles was that the push-up with fists showed the highest muscle activity compared to the finger abduction (p < 0.01) and finger adduction (p < 0.01). Regardless of the shape of the hand, UT had the lowest muscle activity compared to other muscles (p < 0.001). In contrast, the SA muscle had the highest muscle activity among four muscles during the standard push-up. Conclusion: Based on the results of this study, we suggest hand shape is related to the difficulty level of push-up either in the standard or the knee-flexed push-up, especially in the push-up with fists. In addition, knee push-up can be recommended as shoulder musclestrengthening exercises for individuals with low shoulder muscle strength.

Purpose: This study compares the chest compression quality, and the willingness and confidence to perform cardiopulmonary resuscitation (CPR) before and after education between the compression only CPR (COCPR) group and the standard CPR (STCPR) group using manikins. Method: This study employs a randomized controlled trial design. A total of 219 and 214 individuals were randomly assigned to the COCPR and STCPR groups, respectively. Both groups were asked to perform CPR for 2 min before and after education. The willingness and confidence to perform CPR were surveyed through a questionnaire. Results: Before education, the STCPR group had a significantly higher mean chest compression depth and accuracy than the COCPR group for the entire 2 min. After education, the STCPR group had a significantly higher mean chest compression depth for 2 min and higher compression accuracy for late 1 min than the COCPR group. However, no significant difference in the willingness and confidence to perform CPR according to the compression method was evident. Conclusion: Repeated training is required to maintain chest compression quality. CPR education improves willingness and confidence to perform CPR.

본 연구는 국내 중국어교육에서 활용되고 있는 주제범주와 주제항목을 분석하여 이들의 객관성을 확보하고 중국어교육에 적용할 수 있는 주제의 참조기준을 마련을 위한 연구이다. 이를 위해 『CEFR』, 국제통용 한국어표준교육과정』,『Core Inventory for general English』등 외국어교육요목의 주제를 분석하여 일반 언어에서 필요한 보편적인 주제를 분석하고자 하였다. 『国际大纲(2014)』과 『新HSK大纲(2015)』, 『제2외국어과 교육과정』의 주제를 분석하여 중국어교육요목에서만 특징적으로 제시하고 있는 개별적인 주제를 분석하여 언어 보편적 주제와 개별적 주제들을 도출하고자 하였다. 이를 토대로 국내 중국어회화교재의 주제범주와 항목을 비교분석한 그 결과, 국내 중국어교재의 주제는 1단계에서 4단계까지는 보편적인 주제이고, 5단계에서 6단계까지는 중국과 중국의 특징적인 주제를 반영하였다. 중국과 한국의 교재에서 제시한 공통적인 주제는 주로 일상생활과 연계된 주제를 주로 제시하며 언어 보편 적인 주제는 거의 대부분 제시하였다. 하지만 국내 중국어교재는 주제항목의 다양성, 수준별 연계성이 다소 부족한 반면 『HSK标准教程(2015)』는『国际大纲(2014)』과 『新HSK大纲(2015)』에서 제시한 전반적인 주제항목을 반영하고 있고, 중국과 중국문화와 관련된 개별적인 주제를 충분히 제시하고 있음을 알 수 있다. 이것으로 향후 중국어교육에서 주제범주와 주제항목은 수준별 다양화와 수준별 연계성에 대한 체계적인 분석과 연구가 필요하다고 여겨진다.

본 연구에서는 한국 전통 식품에서 Salmonella Typhimurium 와 Listeria monocytogenes의 검출에 대하여 LAMP에 기 반한 3M Molecular Detection Assay 2 (3M MDA 2)와 식품공전에 등재된 분리배지, real-time PCR의 검출 성능을 비교하고자 하였다. 육회와 육사시미에 100–104 CFU/25 g 의 수준으로 S. Typhimurium와 L. monocytogenes을 각각 접종하였다. Citrobacter freundii와 Listeria innocua는 S. Typhimurium와 L. monocytogene의 검출에 영향을 주는 균으로 사용하였다. S. Typhimurium와 L. monocytogenes만 100–104 CFU/25 g수준으로 접종한 모든 시료에서는 분리 배지, real-time PCR과 LAMP에서 양성으로 검출되었다. C. freundii와 L. innocua를 같이 접종한 경우에서 부분적으로 양성이 나타났다. 육회와 육사시미에 대하여 real-time PCR 보다 3M MDA 2가 더 검출효율이 높음을 알 수 있었다. 분리배지가 가장 검출효율이 높았지만 3M MDA 2와 큰 차 이가 없었다. 배지를 사용하는 방법은 최소 일주일의 시간이 소요되고 PCR의 경우 inhibitor의 영향을 많이 받아 정확한 검출이 어려운 점이 있다. 그러나 LAMP에 기반한 3M MDA 2는 enrichment 후 다음 날 간단한 protocol을 통해 25분 이내로 샘플의 양성 반응을 확인할 수 있어 식중독균에 대해 신속하고 정확한 검출이 가능한 것으로 판단되었다.

The biggest impact on the cladding design of buildings is wind loads. Wind tunnel tests were conducted to examine the applicability of current wind load standards about membrane retractable roof spatial structure. A dome model with a circular shape that is retractable to the center of the dome was made (Opening ratio = 0, 10, 30, 50). In addition, height adjustable turntables were made and tested with five patterns with H/D = 0.1, 0.2, 0.3, 0.4 and 0.5. The maximum wind pressure coefficient and the minimum wind pressure coefficient for the cladding were analyzed and the experimental wind pressure coefficient were compared with the current wind load standards, KBC2016 and AIJ-RLB(2015). The experimental value and the reference value of the enclosed roof were very similar and showed possibility of application, but opened roof case was found that the reference value was underestimated.

On November 15, 2017, Pohang earthquake occurred. Its local magnitude was announced to be ML=5.4 by Korea Meteorological Administration (KMA). Ground motion data recorded at KMA stations were obtained from their data bases. From the data, horizontal and vertical response spectra, and V/H ratio were calculated. The horizontal spectra were defined as GMRotI50 spectra. From the statistical analysis of the GMRotI50 spectra, a mean plus one standard deviation spectrum in lognormal distribution is obtained. Regression analysis is performed on this curve to determine the shape of spectrum including transition periods. Applying the same procedure, the shape and transition periods of vertical spectrum were obtained. These results were compared with the Korean standard design spectra, which were developed from domestic and overseas intra-plate earthquake records, and Gyeongju earthquake response spectra. The response spectra of Pohang earthquake were found to be almost identical with the newly proposed design spectra. Even the V/H ratios showed good agreement. These results confirmed that the method adopted when developing the standard design spectra were valid and the developed design spectra were reliable.

On September 12, 2016, Gyeongju earthquake occurred. Its local magnitude was announced to be ML=5.8 by Korea Meteorological Administration (KMA). Ground motion data recorded at KMA, EMC and KERC stations was obtained from their data bases. From the data, horizontal and vertical response spectra, and V/H ratio were calculated. The horizontal spectrum was defined as geometric mean spectrum, GMRotI50. From the statistical analysis of the geometric mean spectra, a mean plus one standard deviation spectrum in lognormal distribution is obtained. Regression analysis is performed on this curve to determine the shape of spectrum including transition periods. Applying the same procedure, the shape and transition periods of vertical spectrum was obtained. These results were compared with the Korean standard design spectra, which were developed from domestic and overseas intraplate earthquake records. The response spectra of Gyeongju earthquake were found to be almost identical with the newly proposed design spectra. Even the V/H ratios showed good agreement. These results confirmed that the method adopted when developing the standard design spectra were valid and the developed design spectra were reliable.

This study investigated the classification of olive oils that are mainly distributed in Korea via imports. The fatty acid contents, degree of color, pigments, anti-oxidants, and sterol contents are analyzed on the different types of olive oil as follows: 10 kinds of extra virgin olive oil, 5 kinds of pure olive oil, and 5 kinds of refined olive-pomace oil. As a result of fatty acid analysis, the majority of oleic acid (C18:1) and palmitic acid (C16:0), and minority of linoleic acid (C18:2) and stearic acid (C18:0) were detected without any significant differences between the grades of olive oils. The UV spectrum is related to the ΔK, and it is a part of the analysis factor for the purity and degree of degradation of the oil. Extra virgin olive oil had ΔK of almost 0, pure olive oil had 0.07~0.12, and refined olive-pomace oil had 0.1~0.13. These differed from extra virgin oil, and the pure or pomace oil ΔK had a confirmed distinct difference. The color degrees of chlorophyll with a low L* value and (－)a* (green) and carotenoid with (+)b* (yellow) were confirmed to have correlation between extra virgin and other olive oils. To compare chlorophyll and carotenoid as natural pigment in olive oils, 417 nm and the ratio of the absorbance at 480 nm (417/480) was calculated at 1.62 of extra virgin, 1.85 of pure olive oil, and 3.32 of refined olive-pomace oil. Therefore, it will be possible to distinguish when the extra virgin or pure olive oil are mixed with olive-pomace oil. The total amount of tocopherol, an anti-oxidant, were 19.06 in extra virgin, 10.91 in pure olive oil, and 27.88 in refined olive-pomace oil. The high content of tocopherol in pomace oil caused recovery of solvent extraction from olive pulp. Thus, extra virgin oil and pure olive oil were distinguished by olive-pomace oil. Polyphenol compounds in extra virgin olive oil measured high only in ferulic acid with 0.543 mg/kg, caffeic acid with 0.393 mg/kg, and other vanillic acid, vanillin, and p-coumaric acid had similar amount of 0.3 mg/kg. All grade of olive oils had the highest β -sitosterol content. Af (Authenticity factor) value were estimated with campesterol and stigmasterol content ratio (%). Af value was 19.2 in extra virgin olive oil, 17.1 in pure olive oil, 16.9 in refined olive-pomace oil, which were distinctive from sunflower oil with 3.7, corn oil with 2.4, and soybean oil with 2.0. It can provide important indicator of olive oil adulteration with other cheap vegetable oils. The results of this study can be used as a database for the classification of olive oil grade and distinguishing between the different types of oils.

We selected 25 pairs of progressive power lenses from 5 companiesOO pairs from higher price group brands and 15 pairs from lower price group brands) among higher domestic market share products and investigated whether they met tolerances regulated by the Organization for International StandardizationOSO). The range of far area focal power was from -2.50D to -3.00D and addition power was from + 2.00D to + 2.50D. The average error from far area focal power was 0.17±0.091D(higher price group : 0.15±0.095D, lower price group: 0.19±0.086D). 3 out of 25 pairs met tolerance by IS0(±0.12D in ;::.:o.OOD and ~6.00D) which was very low02.0%), The average unwanted cylinder power was 0.15±0.060D(higher price group: 0.15±0.065D, lower price group : 0.16±0.058D). 4 out of 25 pairs met tolerance by IS0(±0.12D in ;::.:o.OOD and ~0.75D) which was also very low(16.0%). The average error from addition power was 0.08±0.073D(higher price group : 0.06±0.043D, lower price group : 0.10±0.085D). 18 out of 25 pairs met tolerance by IS0(±0.12D in :<=:4.000)(72.0%). For thickness, we could not evaluate comparing to ISO standard because the manufacturer did not specify the nominal value. It should not deviate from the nominal value by more than ±0.3 mm by ISO standard. The average thickness was 1.77± 0.187 mm(higher price group: 1.74±0.049 mm, lower price group: 1.80±0.237 mm). The higher and lower price groups and right and left lenses were significant statistica!ly in focal power, unwanted cylinder power, addition power and thickness(p < 0.05). From these measurements, we found only 1 pair of progressive power lenses(B-25-20 in higher price group) which met tolerance regulated by ISO. To meet ISO tolerances, more precise manufacturing process should be considered.

This paper is for standard of South and North Korea clothing, especially size. It is analysis and make a comparative study of KS K 0050-0052 which is South Korea industrial standard and KPS 8477.1~3, 8477.6, 8477.9, 10253 which is North Korea's. With this

In human life, clothing, shoes and appliance are necessary and it"s importance is getting higher for better life. This paper is for standard of South and North Korea clothing, especially size. It is analyzing and comparing KS K 0050-0052 (which is south korea industrial standard) and KPS 8477.1~3, 8477.6, 8477.9, 10253 (which is north korea"s). With this research, it is found the difference and sameness, then this paper suggests the method for combining two different standard systems.

Background : Oplopanax elatus Nakai. is distributed in Korea and China. In this study, we have used high performance liquid chromatography (HPLC) to compare the internal standards contents [uracil, adenosine, protocatechuic acid, syringin (eleutheroside B) and scoparone (6,7-dimethoxycoumarin)], and compared the antioxidant activity. Methods and Results : Samples were prepared two different temperature conditions (90℃ and 100℃). Total phenolic contents and total flavonoid contents were analyzed while gallic acid and quercetin were used as standard. Anti-oxidant activities were measured by determination of DPPH and reducing power assay. HPLC was reported as five standard compounds equivalent using the following linear equation based on the calibration curve. According to the results, the anti-oxidant effects of Korean O. elatus Nakai. stem extracts in 90℃ water showed more activity than that of Chinese in DPPH assay. However, the amount of internal compounds was higher in Chinese O. elatus Nakai.. The anti-oxidant effects of Korean O. elatus Nakai. stem extracts in 90℃ water showed more activity than Korean O. elatus Nakai. stem extracts in 100℃ water in DPPH assay. In this study, we had found that, at over the 100℃ temperature all the anti-oxidant effects of O. elatus Nakai. extracts were reduced. However, all five standard compounds were detected at similar value. Conclusion : These results suggests that Korean O. elatus Nakai. has higher anti-oxidant activities which can be use for bioactivity assay.

In this study, we compared Korea and Foreign concrete median barrier(CMB)'s performance class and nominal impact severity from test standards. By using the literature study, minimum legal requirements of the CMB on expressway of Korea and Other countries were compared.

This study was investigated experimental condition which is able to evaluate photocatalytic activity of various commercial TiO₂. The experiments were performed for three representative substances (ethanol, phenol and methylene blue) and four kinds of commercial TiO₂, under the experimental conditions such as pH, reactant concentration, amount of TiO₂, reaction time and UV intensity. The optimum experimental conditions to evaluate photocatalytic activity were as follows : for ethanol, the initial concentration 1000 ppm, initial pH 8, TiO₂ loadings 0.1 wt%, and reaction time 90 minutes: for phenol, the initial concentration 200 ppm, initial pH 8, TiO₂loadings 1 wt%, and reaction time 60 minutes: for methylene blue, the initial concentration 200 ppm, initial pH 4, TiO₂ loadings 0.5 wt%, and reaction time 30 minutes.