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삼각기둥의 Stereology 문제에 관한 이론적 고찰
Browne, J. D.,Jaffrey, D,이주완 대한금속재료학회(대한금속학회) 1984 대한금속·재료학회지 Vol.22 No.9
A theoretical model has been developed to calculate the aspect ratio distribution generated by random sectioning of an equilateral triangular prism. The calculations also show the extent to which this distribution depends upon the dimensional ratio of the prism. The results suggest that it would be feasible to compare the calculated and experimentally determined aspect ratio distributions and thereby establish the dimensional ratio of the real prisms.
Hyperspectral Imaging of Structure and Composition in Atomically Thin Heterostructures
Havener, Robin W.,Kim, Cheol-Joo,Brown, Lola,Kevek, Joshua W.,Sleppy, Joel D.,McEuen, Paul L.,Park, Jiwoong American Chemical Society 2013 Nano letters Vol.13 No.8
<P>Precise vertical stacking and lateral stitching of two-dimensional (2D) materials, such as graphene and hexagonal boron nitride (h-BN), can be used to create ultrathin heterostructures with complex functionalities, but this diversity of behaviors also makes these new materials difficult to characterize. We report a DUV–vis-NIR hyperspectral microscope that provides imaging and spectroscopy at energies of up to 6.2 eV, allowing comprehensive, all-optical mapping of chemical composition in graphene/h-BN lateral heterojunctions and interlayer rotations in twisted bilayer graphene (tBLG). With the addition of transmission electron microscopy, we obtain quantitative structure–property relationships, confirming the formation of interfaces in graphene/h-BN lateral heterojunctions that are abrupt on a micrometer scale, and a one-to-one relationship between twist angle and interlayer optical resonances in tBLG. Furthermore, we perform similar hyperspectral imaging of samples that are supported on a nontransparent silicon/SiO<SUB>2</SUB> substrate, enabling facile fabrication of atomically thin heterostructure devices with known composition and structure.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2013/nalefd.2013.13.issue-8/nl402062j/production/images/medium/nl-2013-02062j_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl402062j'>ACS Electronic Supporting Info</A></P>
Overview of the 2009 Release of the Evaluated Nuclear Data Library (ENDL2009)
D. Brown,B. Beck,M. -A. Descalle,R. Hoffman,E. Ormand,P. Navratil,N. Summers,I. Thompson,R. Vogt,W. Younes,R. Barnowski 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
The Lawrence Livermore National Laboratory (LLNL) Physics Division has produced the next iteration of LLNL's evaluated nuclear database, ENDL2009. ENDL2009 is the second in a series of major ENDL library releases designed to support LLNL's current and future nuclear data needs. This library includes 585 distinct transport-ready evaluations in the neutron sub-library and many physics improvements for energy, nuclear security and stockpile stewardship. In building this library, we adopted the best of the world's nuclear data efforts including the ENDF/B-VII.0, JENDL and other libraries. A large fraction of the neutron sub-library and all of the charged-particle sub-libraries consist of new evaluations developed at LLNL for the ENDL2009 library. In addition, ENDL2009 supports new features such as energy-dependent Q values from fission, support for unresolved resonances and average momentum deposition. Finally, this release is our most highly tested release as we have strengthened our already rigorous testing regime by adding tests against LANL Activation Ratio Measurements and many new critical assemblies. Our testing is now being incorporated into our development process and is serving to guide database improvements.
Structural and thermal characterisation of nanostructured alumina templates
I.W.M. Brown,M.E. Bowden,T. Kemmitt,K.J.D. MacKenzie 한국물리학회 2006 Current Applied Physics Vol.6 No.3
Nanostructured anodic aluminium oxide materials containing a two dimensional array of high aspect ratio aligned pores of 200 nm.C. Thermal analysis shows two discrete irreversible exothermic eventsat 850.C and 1020 .C. XRD and27Al MAS NMR show the progressive development of local and long range order in the heated struc-tures and indicate a reaction sequence of amorphous Al2O3 ! h-Al2O3 ! a-Al2O3 (corundum). NMR shows the co-existence of alumin-ium in 4, 5 and 6-coordinated sites through most of the heating sequence until the stable (6-coordinated) corundum phase is established.Phosphorus impurities incorporated during the membrane fabrication process crystallise as an AlPO4 phase above 850 .C and play animportant role in directing the chemical, physical and structural outcomes of the heat treatment.
Michael W. Corrigan,Ann Higgins-D’ Alessandro,Philip M. Brown 한국교육개발원 2013 KEDI Journal of Educational Policy Vol.10 No.-
This article presents the case for prosocial education as: 1) being the right of every student, parent, and teacher; 2) providing a systemic evidence-based process designed to enhance school attachment, promote social development, and increase academic success; and 3) offering a necessary foundation for effective educational policy. We develop the idea of prosocial education in the context of U.S. education and its challenges; however, we also show how it can be a useful framework to organize school improvement efforts in different nations as well as to inform educational policy for any nation. We illustrate how helping educators create positive, stimulating classrooms and schools, and effectively integrate prosocial ideas into daily practices, develops students physically, socially, behaviorally, ethically, emotionally, and intellectually, providing the competencies essential to become citizens committed to contributing to the common good.
Oxidative stress and endometriosis
Jackson, L.W.,Schisterman, E.F.,Dey-Rao, R.,Browne, R.,Armstrong, D. Oxford University Press 2005 Human reproduction Vol.20 No.7
<P>BACKGROUND: Little is known about the aetiology of endometriosis; however, in the presence of oxidative stress, reactive oxygen species might increase growth and adhesion of endometrial cells in the peritoneal cavity, leading to endometriosis and infertility. Within a study investigating persistent organic compounds and endometriosis, the authors evaluated the association between oxidative stress and endometriosis. METHODS: Women aged 18–40 years who were undergoing laparoscopy were contacted to participate in the study (<I>n</I>=100); 84 were eligible and agreed to be interviewed; 78 provided blood specimens. Four markers of oxidative stress and antioxidant status were measured in serum for 61 women. Multiple imputation of missing data was used to generate values for the missing oxidative stress data. RESULTS: Thirty-two women had visually confirmed endometriosis at laparoscopy while 52 did not, including 22 undergoing tubal ligation and 30 with idiopathic infertility. There was a weak association between thiobarbituric acid-reactive substances (nmol/ml) and endometriosis, after adjusting for age, body mass index, current smoking, hormone use in the past 12 months, gravidity, serum vitamin E, serum estradiol, and total serum lipids (β=1.18; 95% CI–0.04, 2.39). CONCLUSIONS: These results suggest that oxidative stress might play a role in the development and progression of endometriosis, which should be evaluated in larger studies.</P>