• 한국학교수학회논문집
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• 제14권4호
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• pp.491-518
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• 2011

최근에 수행된 여러 연구 결과에 따르면 우리나라 학생들의 수학에 대한 정의적 성취는 인지적 성취에 비해 매우 낮은 수준으로 나타났고, 이는 개인 연구자 수준을 넘어서 국가적 차원에서 연구를 요구하는 수준에 이르렀다. 현재 수학에 대한 정의적 성취를 향상시키기 위한 다양한 노력과 논의가 진행되고 있으나 수학 교사에 초점을 맞춘 정의적 영역에 대한 연구는 미비한 실정이다. 이에 본 연구에서는 경기도 소재 중등학교 수학 교사 327명을 대상으로 교사들의 정의적 특성에 대한 인식, 수업에서의 실천도, 향후 실천 의지 및 계획 등에 관해서 조사를 하였다. 선행 연구에 따르면 수학 교과에 대한 학생들의 정의적 성취는 매우 낮은 수준으로 나타난 반면 본 연구에서 조사한 교사들의 수업에서의 정의적 영역에 대한 인식 및 실천 정도는 상대적으로 높게 나타난 교사와 학생간의 견해 차이가 존재함을 알 수 있었다.

• 한국축산식품학회지
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• 제36권4호
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• pp.523-530
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• 2016

This study investigates the effect of bovine heart surimi-like material (BHSM) used as a back fat replacer, on the physicochemical and sensory characteristics of frankfurter-type sausages. Frankfurter-type sausage with added BHSM had a higher moisture content and lower fat content than the control. In addition, the samples with added BHSM had higher pH, cooking loss and 2-thiobarbituric acid-reactive substance (TBARS) value and lower water exudation than the control. The sausage formulation with 40% BHSM was more effective in delaying lipid oxidation without affecting cooking loss compared to the 60% BHSM treatment sample. Results showed that hardness values increased upon replacement with BHSM, and sausages manufactured with 40% BHSM had higher lightness and lower redness values. Panelists found there were no differences in color, odor, and tenderness scores and the overall acceptability score found that treatment samples containing 20% and 40% BHSM were preferable to the control after storage for 14 d. These results indicate that fat replacement with BHSM was beneficial to the quality of frankfurter-type sausages, and acceptable reduced-fat products can be produced when back fat is replaced with up to 40% BHSM.

• Steel and Composite Structures
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• 제16권5호
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• pp.491-506
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• 2014

Buckling-restrained braces (BRBs) have excellent hysteretic behavior while buckling-restrained braced frames (BRBFs) are susceptible to residual lateral deformations. To address this drawback, a novel self-centering (SC) BRB with Basalt fiber reinforced polymer (BFRP) composite tendons is presented in this work. The configuration and mechanics of proposed BFRP-SC-BRBs are first discussed. Then an 1840-mm-long BFRP-SC-BRB specimen is fabricated and tested to verify its hysteric and self-centering performance. The tested specimen has an expected flag-shaped hysteresis character, showing a distinct self-centering tendency. During the test, the residual deformation of the specimen is only about 0.6 mm. The gap between anchorage plates and welding ends of bracing tubes performs as expected with the maximum opening value 6 mm when brace is in compression. The OpenSEES software is employed to conduct numerical analysis. Experiment results are used to validate the modeling methodology. Then the proposed numerical model is used to evaluate the influence of initial prestress, tendon diameter and core plate thickness on the performance of BFRP-SC-BRBs. Results show that both the increase of initial prestress and tendon diameters can obviously improve the self-centering effect of BFRP-SC-BRBs. With the increase of core plate thickness, the energy dissipation is improved while the residual deformation is generated when the core plate strength exceeds initial prestress force.

• 복식문화연구
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• 제15권6호
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• pp.965-981
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• 2007

Since the latter half of 20 century, in Korea, there are many discussions on the identity of Korean itself in several divisions, in which the discussion on the identity in the part of the costume or the part of the art reflecting the life, is the subject which must not fail to be noticed. So, we try to study the common structure manifested in the Korean painting and the costume as a part of basic recognition of problems and the way of problem-solving for the research on the Koran formative characteristics. The method and the process of this study is first, to consider the characteristics of the plastic and style of the Oriental arts and the Occidental arts by discourse implicate the difference between Oriental and Occidental view and the recognition of the body in the two worlds. And in the study we try to apprehend the dynamic modern artistic value of Korean style through assimilation between the Korean style and Baroque style according to the theory of $W\ddot{o}lfflin$ about the classical style and Baroque style. We will describe the Korean identity by analyzing the Korean plasticity with the Occidental style of dress and paintings reflecting the Occidental culture and thought and the Oriental things, and modern paintings and dress in the present age. As a result, we can try to recherche the way of use of new design for the identity of Korean style, in the concept of the ellipsis, repetition of the retrait, obscur silhouette, and superimposition.

• 한국컴퓨터정보학회논문지
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• 제16권4호
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• pp.23-28
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• 2011

본 논문에서는 복부의 초음파 영상을 확대할 경우에 발생하는 영상의 품질 저하를 최소화하기 위하여 원본 영상과 확대된 결과 영상 간의 명암도 차이와 보간 수행 시에 적용되는 가중치 값을 퍼지 기법에 적용하여 영상을 확대하는 방법을 제안한다. 제안된 방법은 기존의 양선형 보간법으로 도출된 결과 영상의 픽셀과 원본 영상 픽셀 간의 명암도 차이와 보간 수행시에 네 개의 픽셀 값에 곱하게 되는 가중치 값을 퍼지 소속 함수에 적용하여 원본 영상의 픽셀 정보와 가장 근접한 특징을 가진 확대된 결과 영상의 픽셀 정보를 도출한다. 제안된 방법을 실험한 결과, 기존의 양선형 보간법에 비해 복부의 초음파 영상을 확대할 때 발생하는 흐림 현상이 상대적으로 감소하여 영상의 품질이 개선되는 것을 확인하였다.

• 식물분류학회지
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• 제46권3호
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• pp.273-282
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• 2016

The establishment of a DNA barcode database at the regional scale and assessments of the utility of DNA barcodes are crucial for conservation biology and for the sustainable utilization of biological resources. Schisandraceae is a small family consisting of ca. 45 species. It contains many economically important species, such as Schisandra chinensis, which is widely used as a source in tonic beverages and in oriental medicine. In Korea, three species, S. chinensis, S. repanda, and Kadsura japonica, are distributed. We evaluated the level of variation of the DNA sequences of rbcL, matK, and the ITS regions from 13 accessions representing the distributional range of the three species. The three DNA barcode regions were easily amplified and sequenced. The minimum values of the interspecific genetic distances among S. chinensis, S. repanda, and K. japonica either separately or in combination are 4- to 23-fold higher than the maximum value of the intraspecific distance, showing that there is a clear DNA barcoding gap in the regions for Korean Schisandraceae. Phylogenetic analyses of the three DNA barcode regions, separately and simultaneously, indicate that all of the DNA barcode regions are useful for identifying a species of Schisandraceae in Korea. The distinctiveness of the three species of Schisandraceae was also supported at the species level when Chinese and Japanese populations were added. The results of this study indicate that three concatenated regions constitute the best option for DNA barcoding in Schisandraceae in Korea.

• 품질경영학회지
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• 제48권3호
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• pp.453-462
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• 2020

Purpose::This study aims to analyze the management performance and production efficiency of medicinal crop farmers. Methods: We conducted an empirical survey of medicinal crop farmers and analyzed production efficiency using DEA method. Results: First, The crops that increased the number of farms during 2010 and 2018 were Angelica tenuissima and Salvia miltiorrhiza, which was attributed to higher income per hour than other crops. Second, As for the efficiency of Liriope platyphylla, the average was 0.376, and the coefficient of variation was the lowest, 0.566. Third, Salvia miltiorrhiza and Atractylodes japonica had the highest technical efficiency after Liriope platyphylla, but the variation coefficient was high and the efficiency was relatively high. Fourth, As a result of performing variance analysis to find out the difference of each crops on the value of medicinal crop efficiency, the technical efficiency, pure technical efficiency, and scale efficiency were all statistically significant. Conclusion: Based on the results above, following policy suggestions are offered. First, It is necessary to provide information on crops with high income compared to the input of labor, and to develop labor-saving cultivation technologies for each crop. Second, A stable labor supply system will be needed in rural areas. Third, Efforts should be made to close the technological gap between farmers through a lot of education and consulting for farmers who grow medicinal crops.

• 한국방사선학회논문지
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• 제5권6호
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• pp.383-389
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• 2011

Geant4와 DICOM 파일의 연동을 이용한 몬테카를로 시뮬레이션을 통해 실제 환자의 흡수선량을 산출하는 새로운 방법을 제시하고, Geant4 계산코드의 검증을 위해 MOSFET 선량계를 이용하여 PMMA 모의 팬텀 깊이에 따른 중심에서의 흡수선량 실측값과 Geant4 시뮬레이션 결과값을 비교하였다. PMMA slab의 불완전한 압착으로 인해 발생한 불균등한 간격의 공기층이 존재하지 않은 부분에서는 X선 조사야 $15{\times}15cm^2$와 $20{\times}20cm^2$에서 각각 $0.46{\pm}4.69%$와 $-0.75{\pm}5.19%$로 나타났다. PMMA 모의 팬텀의 불완전한 압착에 의해 나타난 오차를 제외하면 Geant4와 DICOM 파일의 연동을 통한 몬테카를로 시뮬레이션에 의한 계산값이 잘 일치함을 알 수 있다.

• 한국인터넷방송통신학회논문지
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• 제14권5호
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• pp.203-208
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• 2014

본 논문에서는 내장형 안테나의 일종인 IFA 구조를 이용하여 433MHz용 소형 능동 RFID 안테나를 제안하였다. 제안한 안테나에서 급전점과 단락스트립 사이의 간격 변화, 복사기에 미엔더 라인 구조를 삽입, 복사기와 접지면 사이 간격 변화를 주어 안테나 성능을 개선하였다. 안테나 파라미터 특성에 확인하기 위하여 ANSYS사의 HFSS를 이용하였다. 433MHz 능동형 RFID 주파수 대역은 433.67-434.17MHz이다. 제작한 안테나는 433MHz 능동형 RFID 대역에서 반사손실 -9.54dB이하의 값을 가지며, 최대 안테나 이득은 -4.28dBi임을 확인할 수 있다. 제안한 안테나의 전체 지그 크기는 $72{\times}44{\times}1mm$이고, 안테나 부분은 $35.5{\times}19.5mm$이다. 안테나의 측정결과와 시뮬레이션 결과를 비교하여 분석한 결과, IFA 구조를 이용한 소형 433MHz 안테나의 실용화 가능성을 확인 할 수 있었다.

• 대한치과의사협회지
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• 제53권9호
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• pp.602-609
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• 2015

The aim of this document is to evaluate the effect of bite balance on physical fitness and motor capacity to determine the importance of the occlusal stability as a possible action mechanism of occlusal appliance including mouthguards on physical performances. We all remember that day when the prominent athlete was in the news wearing a mouthguard to improve human athletic performance. I once had investigated the determinants of athletic performance in all sorts of sports. Most of the studies had overinterpretation of results and lack of evidence to support the information. However, I discovered great expectations for new possibility in this field and settled for a more academic approach to this intriguing subject. The followings are some examples of the subject 1. Archers who wore occlusal appliances to increase the vertical dimension of occlusion by 2~3mm increased their ability to focus and to maintain good sense of balance. Their accuracy rate has been improved. The appliance was made of acrylic resin (a type of plastic). 2. Canoe players who wore occlusal appliances to increase the vertical dimension of occlusion by 5mm surpassed longtime competitor and won the race with 10 seconds gap. 3. A cycle rider who wore an occlusal appliance to treat his malocclusion surpassed his old record from 10.8 seconds to 10.3 seconds. His muscle reflexes (anaerobic exercise) and endurance (aerobic exercise) has been enhanced. 4. Occlusal appliances had a good effect on athletic performance in most sports such as swimming, diving, and weightlifting. As for the clenching on dentition, people clench their teeth when they push their physical and mental limits during sports activities. Clenching can be induced by physical exertion when maximum muscle strength is retained and this is similarly found in different types of exercises. In addition, restraint of respiratory function is observed. Therefore, creating a occlusal balance with occlusal appliance or mouthguard promoted a favorable influence when an athlete clenches.