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항공 요구조건에 따른 TruPrint 5000 에 대한 Ti6Al4V의 기계적 특성 평가
Simone Koummarasy,Jan Christian Schauer,Matthias Mueller 한국레이저가공학회 2021 Laser Solutions Vol.24 No.10
본 보고서는 Toolcraft와 TRUMPF가 TRUMPF에서 출시한 최신 설비 중 하나인 TruPrint 5000에서 Ti6Al4V시편의 초기 검증에 어떻게 접근했는지에 대한 방법을 소개하는 내용으로 구성되어 있다. Laser Powder Bed Fusion (LPBF) 기술을 사용하여 적층 제조된 부품에 대한 항공 요구 사항에 따라 Toolcraft에서 산업용 항공 우주 환경 내 TruPrint 5000에서 테스트 빌드 작업을 설계 및 생산했다. 본 자료의 주 내용인 재료 특성 관련 결과(CT 촬영, 미세구조 및 입자 크기, 인장시험, 피로시험, 파괴인성 등)는 정식 인가를 보유한 외부 시험 기관을 통하여 평가 및 확인하였다.
Alterations in cardiac DNA methylation in human dilated cardiomyopathy
Haas, Jan,Frese, Karen S,Park, Yoon Jung,Keller, Andreas,Vogel, Britta,Lindroth, Anders M,Weichenhan, Dieter,Franke, Jennifer,Fischer, Simon,Bauer, Andrea,Marquart, Sabine,Sedaghat-Hamedani, Farbod,Ka WILEY-VCH Verlag 2013 EMBO molecular medicine Vol.5 No.3
<P>Dilated cardiomyopathies (DCM) show remarkable variability in their age of onset, phenotypic presentation, and clinical course. Hence, disease mechanisms must exist that modify the occurrence and progression of DCM, either by genetic or epigenetic factors that may interact with environmental stimuli. In the present study, we examined genome-wide cardiac DNA methylation in patients with idiopathic DCM and controls. We detected methylation differences in pathways related to heart disease, but also in genes with yet unknown function in DCM or heart failure, namely <I>Lymphocyte antigen 75</I> (<I>LY75</I>), <I>Tyrosine kinase-type cell surface receptor HER3</I> (<I>ERBB3</I>), <I>Homeobox B13</I> (<I>HOXB13</I>) and <I>Adenosine receptor A2A</I> (<I>ADORA2A</I>). Mass-spectrometric analysis and bisulphite-sequencing enabled confirmation of the observed DNA methylation changes in independent cohorts. Aberrant DNA methylation in DCM patients was associated with significant changes in <I>LY75</I> and <I>ADORA2A</I> mRNA expression, but not in <I>ERBB3</I> and <I>HOXB13</I>. <I>In vivo</I> studies of orthologous <I>ly75</I> and <I>adora2a</I> in zebrafish demonstrate a functional role of these genes in adaptive or maladaptive pathways in heart failure.</P>
Definition of Antenna Diversity Gain in User-Distributed 3D-Random Line-of-Sight
Per-Simon Kildal,Ulf Carlberg,Jan Carlsson 한국전자파학회JEES 2013 Journal of Electromagnetic Engineering and Science Vol.13 No.2
The present paper defines diversity gain for stationary users. This deals in particular with gathering the received signal statistics over possible user positions and orientations in space rather than over time, and to define a meaningful diversity gain related to the cumulative improvement of the performances of the 1% users with the worst receiving conditions. The definition is used to evaluate diversity gain for some typical small antennas in an extreme environment with only line-of-sight (LOS). The LOS environment is regarded as user-distributed 3D-random LOS caused by the statistics of an ensemble of stationary users with arbitrary orientations in the horizontal plane (2D), and with arbitrary orientations of their wireless devices in the vertical plane. Thus, an overall 3D-random distribution of user orientation is assumed.
Comprehensive validation of silicon cross sections
Czakoj, Tomas,Kostal, Michal,Simon, Jan,Soltes, Jaroslav,Marecek, Martin,Capote, Roberto Korean Nuclear Society 2020 Nuclear Engineering and Technology Vol.52 No.12
Silicon, especially silicon in the form of SiO<sub>2</sub>, is a major component of rocks. Final spent fuel storages, which are being designed, are located in suitable rock formations in the Earth's crust. Reduction of the uncertainty of silicon neutron scattering and capture is needed; improved silicon evaluations have been recently produced by the ORNL/IAEA collaboration within the INDEN project. This paper deals with the nuclear data validation of that evaluation performed at the LR-0 reactor by means of critical experiments and measurement of reaction rates. Large amounts of silicon were used both as pure crystalline silicon and SiO<sub>2</sub> sand. The critical moderator level was measured for various core configurations. Reaction rates were determined in the largest core configuration. Simulations of the experimental setup were performed using the MCNP6.2 code. The obtained results show the improvement in silicon cross-sections in the INDEN evaluations compared to existing evaluations in major libraries. The new Thermal Scattering Law for SiO<sub>2</sub> published in ENDF/B-VIII.0 additionally reduces the discrepancy between calculation and experiments. However, an unphysical peak is visible in the neutron spectrum in SiO<sub>2</sub> obtained by calculation with the new Thermal Scattering Law.
Zeolite Membranes: Functionalizing of Properties by Tailored Compositions
Richter, Hannes,Weyd, Marcus,Simon, Adrian,Kuhnert, Jan-Thomas,Gunther, Christiane,Voigt, Ingolf,Michaelis, Alexander The Membrane Society of Korea 2017 멤브레인 Vol.27 No.6
Membrane separation is a technology of low energy consumption. Membranes made of zeolites are of great interest because their fixed and open pores in the size of small molecules inside crystalline structures allow separation processes under harsh conditions. While zeolite NaA (LTA-type) is industrially used for dewatering of organic solvents, its pore size and thermal and hydrothermal stability can be tuned by exchange of framework and extra-framework elements. SOD with pores of only 0.28 nm is of great interest for $H_2$- und $H_2O$-separation and also can be tuned by ion exchange. Zeolites open the opportunity to create membranes of adapted separation behavior for small molecules in conditions of surrounding technical processes. 분리막을 이용한 분리 기술은 에너지 소요가 적다. 제올라이트를 기반으로 제작한 분리막의 경우, 결정 구조 내에 작은 분자 크기의 기공을 갖고 있어 이를 이용하여 가혹한 조건에서도 분리가 가능하기 때문에, 그 관심도가 높다. NaA (LTA 유형의 제올라이트) 제올라이트의 경우, 산업적으로 유기 용매에서 수분을 제거하는 데 많이 사용되는 데, 해당 기공 크기나 열적/수열안정성은 제올라이트 내부나 외부의 원소를 바꿔줌으로써 조절할 수 있다. 더 작은 0.28 nm 크기를 지닌 SOD 유형의 제올라이트의 경우, 수소나 물 분리에 적합하여 그 관심도가 높아지고 있으며, 이 제올라이트 유형 또한, 이온교환과 같은 방법으로 성질을 변경할 수 있다. 제올라이트는 주변 기술 및 공정 조건에 맞게 작은 분자들을 적절하게 분리할 수 있는 분리막을 창출할 수 있다는 장점을 지닌 소재이다.
Copper neutron transport libraries validation by means of a <sup>252</sup>Cf standard neutron source
Schulc, Martin,Kostal, Michal,Novak, Evzen,Simon, Jan Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.10
Copper is an important structural material in various nuclear energy applications, therefore the correct knowledge of copper cross sections is crucial. The presented paper deals with a validation of different copper transport libraries by means of activation of selected samples. An intense <sup>252</sup>Cf(sf) source with a reference neutron spectrum was used as a neutron source. After irradiation, the samples were measured using a high purity germanium detector and the dosimeter reaction rates were inferred. These experimental data were compared with MCNP6 calculations using CENDL-3.1, JENDL-4.0, ENDF/B-VII.1, ENDF/B-VIII.0, JEFF-3.2 and JEFF-3.3 evaluated Cu transport libraries. The experiment specifically focuses on <sup>58</sup>Ni(n,p)<sup>58</sup>Co, <sup>93</sup>Nb(n,2n)<sup>92m</sup>Nb, <sup>197</sup>Au(n,g)<sup>198</sup>Au and <sup>55</sup>Mn(n,g)<sup>56</sup>Mn dosimetry reactions. Evaluated activation cross sections of these dosimetric reactions were taken from the IRDFF-II library. The best library performance depends on the energy region of interest.
제올라이트 분리막: 조성 변경을 통한 분리막 성질의 조절
Hannes Richter,Marcus Weyd,Adrian Simon,Jan-Thomas Kühnert,Christiane Günther,Ingolf Voigt,Alexander Michaelis 한국막학회 2017 멤브레인 Vol.27 No.6
분리막을 이용한 분리 기술은 에너지 소요가 적다. 제올라이트를 기반으로 제작한 분리막의 경우, 결정 구조 내에 작은 분자 크기의 기공을 갖고 있어 이를 이용하여 가혹한 조건에서도 분리가 가능하기 때문에, 그 관심도가 높다. NaA (LTA 유형의 제올라이트) 제올라이트의 경우, 산업적으로 유기 용매에서 수분을 제거하는 데 많이 사용되는 데, 해당 기공 크기나 열적/수열안정성은 제올라이트 내부나 외부의 원소를 바꿔줌으로써 조절할 수 있다. 더 작은 0.28 nm 크기를 지닌 SOD 유형의 제올라이트의 경우, 수소나 물 분리에 적합하여 그 관심도가 높아지고 있으며, 이 제올라이트 유형 또한, 이온 교환과 같은 방법으로 성질을 변경할 수 있다. 제올라이트는 주변 기술 및 공정 조건에 맞게 작은 분자들을 적절하게 분리할 수 있는 분리막을 창출할 수 있다는 장점을 지닌 소재이다. Membrane separation is a technology of low energy consumption. Membranes made of zeolites are of great interest because their fixed and open pores in the size of small molecules inside crystalline structures allow separation processes under harsh conditions. While zeolite NaA (LTA-type) is industrially used for dewatering of organic solvents, its pore size and thermal and hydrothermal stability can be tuned by exchange of framework and extra-framework elements. SOD with pores of only 0.28 nm is of great interest for H2- und H2O-separation and also can be tuned by ion exchange. Zeolites open the opportunity to create membranes of adapted separation behavior for small molecules in conditions of surrounding technical processes.
Zeolite Membranes: Functionalizing of Properties by Tailored Compositions
Hannes Richter,Marcus Weyd,Adrian Simon,Jan-Thomas Kühnert,Christiane Günther,Ingolf Voigt,Alexander Michaelis 한국막학회 2017 멤브레인 Vol.27 No.6
Membrane separation is a technology of low energy consumption. Membranes made of zeolites are of great interest because their fixed and open pores in the size of small molecules inside crystalline structures allow separation processes under harsh conditions. While zeolite NaA (LTA-type) is industrially used for dewatering of organic solvents, its pore size and thermal and hydrothermal stability can be tuned by exchange of framework and extra-framework elements. SOD with pores of only 0.28 nm is of great interest for H 2 - und H 2 O-separation and also can be tuned by ion exchange. Zeolites open the opportunity to create membranes of adapted separation behavior for small molecules in conditions of surrounding technical processes.