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스트룹 테스트와 단순반응 테스트의 훈련 향상도에 관한 연구
조현우,박영민,박사엘,공추,왕초전,장신,김재화 순천향대학교 기초과학연구소 2022 순천향자연과학연구 논문집 Vol.28 No.1,2
This study which of the Stroop test training and simple response training can reduce the Stroop effect in the information processing process when continuous training is performed. 4 male students from S University(Asan-si) were divided into Stroop test training group(2) and simple reaction group(2). The test was conducted 10 times a day, and average was obtained and analyzed. The results encountered through this study are as follows. 1 The simple response training group improved more slowly than the Stroop test training group. 2. In the Stroop test training group, the rate of increase increased significantly compared to the simple response training group, but it did not increase once the record reached a certain point. 3. Simple response training at increasing values was also trained on the Stroop effect. 4. In the average of phage values, both groups look similar.
가야산지역 계곡부와 능선부의 해발고와 사면부위에 따른 삼림구조
박인협,조재창,오충현 순천대학교 기초과학연구소 1990 基礎科學硏究誌 Vol.1 No.-
가야산지역 계곡부와 능선부의 해발고와 사면부위에 따른 삼림구조를 조사하기 위하여 해인사-두리봉 동측 계곡부(해발 600∼1,000m)에 해발고와 사면부위에 따라 63개 조사구 국일암-가야산 정부 능선부(해발 700m∼1,430m)에 해발고에 따라 38개 조사구를 설치하였다. 계곡부 전체의 군집형은 신갈나무-조록싸리군집이었으며, 능선부는 소나무, 신갈나무-진달래군집이었다. 계곡부와 능선부의 유사도지수는 38.2%이었다. 계곡부 전체의 종 다양도는 1.3402, 능선부는 1.0098이었다. 식생천이는 소나무, 잣나무 → 신갈나무 → 졸참나무, 서어나무로 진행되는 것으로 추정되었다. 계곡부의 사면 하부에서 상부로 감에 따라 상대우점치가 증가하는 수종은 신갈나무, 갈참나무, 진달래, 조록싸리 등이었으며, 상대우점치는 증가하는 반면, 소나무는 감소하는 경향을 보였다. 계곡부에서는 해발고가 높아짐에 라다 모두 감소하였다. 계곡부의 사면 상, 중, 하부간 유사도 지수는 66.6∼69.2%, 해발고대간 유사도지수는 25.9∼79.8%로써 사면 부위보다 해발고에 따른 종구성 상태의 차이가 심한 것으로 나타났다. 능선부에서는 해발고가 높아짐에 따라 교목상층 밀도, 흉고단면적은 감소하는 경향을 보였으며, 종다양도는 일정한 경향을 보이지 않았다. 능선부의 해발고대간 유사도 지수는 27.9∼98.2%이었다. A valley and a ridge forest in Mt. Gaya area was studied to investigate forest structure in relation to altitude and part of slope. Sixty-three quadrats were set up in the valley forest along altitude of 600m to 1,000m and part of slope, and thirty-eight quadrats were set up in the ridge forest along altitude of 700m to 1,430m. According to the importance values, the valley forest was Quercus mongolica-Lespedeza meximowiczii community and the ridge forest was Pinus densiflora, Quercus mongolica-Rhododendron community. Similarity index between the valley forest community and the ridge forest community was 37.2%. Shannon's species diversities of the valley forest community and the ridge forest community were 1.3402 and 1.0098, respectively. According to importance values by crown stories and DCA ordination, successional trends of tree species may be from Pinus densiflora and Pinus koraiensis through Quercus mongolica to Quercus serrata and Carpinus laxiflora. As going from the lower part to upper part of the slope in the valley forest, the importance values of Quercus mongolica and Quercus aliena, Rhododendron mucronulatum and Lespedeza meximowiczii increased while those of Carpinus laxiflora and Fraxinus rhynchophylla decreased. With increasing elevation in the valley and ridge forest, the importance value of Pinus densiflora decreased while that of Quercus mongolica increased. In the valley forest, densities of canopy and shrubstratum increased as increasing elevation, and the number of species and species diversity decreased as increasing elevation and going from the lower part to the upper of slope. The range similarity indices between parts of the slope, and the elevation belts of 100m in the valley forest were 66.6∼69.2 and 25.9∼79.8%, respectively. In the ridge forest, density and basal area of canopy tended to decreased as increasing elevation, and the range of similarity indices between elevation belts of 100m was 27.9∼98.2%.
Choi, Dukhyun,Choi, Min-Yeol,Choi, Won Mook,Shin, Hyeon-Jin,Park, Hyun-Kyu,Seo, Ju-Seok,Park, Jongbong,Yoon, Seon-Mi,Chae, Seung Jin,Lee, Young Hee,Kim, Sang-Woo,Choi, Jae-Young,Lee, Sang Yoon,Kim, Jo WILEY-VCH Verlag 2010 ADVANCED MATERIALS Vol.22 No.19
<B>Graphic Abstract</B> <P>The cover shows an image of fully rollable transparent nanogenerators synthesized using chemical vapor deposition grown large-scale graphene sheets as transparent electrodes and piezoelectric ZnO nanorod arrays. Sang-Woo Kim, Jae-Young Choi, and co-workers report on p. 2187 the electrical and structural stability of the nanogenerators, with excellent charge scavenging performance under external mechanical loads such as bending and rolling. This study shows that graphene-based nanogenerators are very promising for self-powered rollable transparent device applications. <img src='wiley_img_2010/09359648-2010-22-19-ADMA201090066-content.gif' alt='wiley_img_2010/09359648-2010-22-19-ADMA201090066-content'> </P>
Jo, Jae Hyeon,Choi, Ji Ung,Park, Yun Ji,Zhu, Jiefang,Yashiro, Hitoshi,Myung, Seung-Taek American Chemical Society 2019 ACS APPLIED MATERIALS & INTERFACES Vol.11 No.6
<P>Sacrificing sodium supply sources is needed for sodium-deficient cathode materials to achieve commercialization of sodium-ion full cells using sodium-ion intercalation anode materials. Herein, the potential of ethylenediaminetetraacetic acid tetrasodium salt (EDTA-4Na) as a sacrificing sodium supply source was investigated by intimately blending it with sodium-deficient P2-type Na<SUB>0.67</SUB>[Al<SUB>0.05</SUB>Mn<SUB>0.95</SUB>]O<SUB>2</SUB>. The EDTA-4Na/Na<SUB>0.67</SUB>[Al<SUB>0.05</SUB>Mn<SUB>0.95</SUB>]O<SUB>2</SUB> composite electrode unexpectedly exhibited an improved charge capacity of 177 mA h (g-oxide)<SUP>−1</SUP> compared with the low charge capacity of 83 mA h (g-oxide)<SUP>−1</SUP> for bare Na<SUB>0.67</SUB>[Al<SUB>0.05</SUB>Mn<SUB>0.95</SUB>]O<SUB>2</SUB>. The reversible capacity of an EDTA-4Na/Na<SUB>0.67</SUB>[Al<SUB>0.05</SUB>Mn<SUB>0.95</SUB>]O<SUB>2</SUB>//hard carbon full-cell system increased to 152 mA h (g-oxide)<SUP>−1</SUP> at the first discharge with a Coulombic efficiency of 89%, whereas the Na<SUB>0.67</SUB>[Al<SUB>0.05</SUB>Mn<SUB>0.95</SUB>]O<SUB>2</SUB> without EDTA-4Na delivered a discharge capacity 51 mA h g<SUP>-1</SUP> because of the small charge capacity. The EDTA-4Na sacrificed itself to generate Na<SUP>+</SUP> ions via oxidative decomposition by releasing four sodium ions and producing C<SUB>3</SUB>N as a decomposition resultant on charge. It is thought that the slight increase in discharge capacity is associated with the electroconducting nature of the C<SUB>3</SUB>N deposits formed on the surface of the Na<SUB>0.67</SUB>[Al<SUB>0.05</SUB>Mn<SUB>0.95</SUB>]O<SUB>2</SUB> electrode. We elucidated the reaction mechanism and sacrificial activity of EDTA-4Na, and our findings suggest that the addition of EDTA-4Na is beneficial as an additional source of Na<SUP>+</SUP> ions that contribute to the charge capacity.</P> [FIG OMISSION]</BR>
Jo Hyeon Jae,Kim Ji Seon,Choe Pyoeng Gyun,Lee Hyo Yeon,Chang Euijin,Jung Hyemin,Kang Chang Kyung,Park Wan Beom,Kim Nam Joong,Oh Myoung-don 대한의학회 2021 Journal of Korean medical science Vol.36 No.38
Applying work restrictions for asymptomatic healthcare personnel (HCP) with potential exposure to coronavirus disease 2019 (COVID-19) is recommended to prevent transmission from potentially contagious HCP to patients and other HCP. However, it can lead to understaffing, which threatens the safety of both patients and HCP. We evaluated 203 COVID-19 exposure events at a single tertiary hospital from January 2020 to June 2021. A total of 2,365 HCP were potentially exposed, and work restrictions were imposed on 320 HCP, leading to the loss of 3,311 working days. However, only one of the work-restricted HCP was confirmed with COVID-19. During the study period, the work restriction measures might be taken excessively compared to their benefit, so establishing more effective standards for work restriction is required.
Prediction of Separation Trajectory for TSTO Launch Vehicle Using Steady State Aerodynamic Database
Jae Hyeon Jo,Sang Jun Ahn,Oh Joon Kwon 한국전산유체공학회 2014 한국전산유체공학회 학술대회논문집 Vol.2014 No.10
In this paper, the prediction of the separation trajectory for a Two-Stage-To-Orbit (TSTO) space launch vehicle has been numerically simulated by using an aerodynamic database based on steady state analysis. The steady flow simulations around the launch vehicle have been made by using a 3-D RANS flow solver based on unstructured mesh. Calculations were made for the wind-tunnel experiment model of the LGBB TSTO vehicle configuration on steady state conditions. An overset mesh technique was adopted to handle the relative distance between an orbiter and a booster. To construct aerodynamic database, the calculation cases considering the relative positions were obtained from an improved distributed hypercube sampling method. An artificial neural network (ANN) was applied to construct the interpolation functions representing the relations between the relative position of two vehicles and the aerodynamic forces. The separation trajectory for the TSTO launch vehicle was predicted using six-degree-of-freedom equation of motion based on the interpolation functions. The predicted separation trajectory wasfound in good agreement with the experimental results.