ALBERT

Description: Author(s): P. S. Wang, P. Zhou, J. Dai, J. Zhang, X. X. Ding, H. Lin, H. H. Wen, B. Normand, R. Yu, and Weiqiang Yu We report a high-pressure As 75 NMR study on the heavily hole-doped iron pnictide superconductor KFe 2 As 2 ( T c ≈ 3.8 K). The low-energy spin fluctuations are found to decrease with applied pressure up to 2 GPa, but then to increase again, changing in lockstep with the pressure-induced evolution of T c . Th… [Phys. Rev. B 93, 085129] Published Mon Feb 22, 2016

Description: Author(s): L. Lin, H. M. Zhang, M. F. Liu, Shoudong Shen, S. Zhou, D. Li, X. Wang, Z. B. Yan, Z. D. Zhang, Jun Zhao, Shuai Dong, and J.-M. Liu Hexagonal LuFe O 3 has drawn a lot of research attention due to its contentious room-temperature multiferroicity. Due to the instability of hexagonal phase in the bulk form, most experimental studies focused on LuFe O 3 thin films which can be stabilized by strain using proper substrates. Here we report… [Phys. Rev. B 93, 075146] Published Tue Feb 23, 2016

Description: Author(s): C.-P. Chang, J. G. Lin, H. T. Jeng, S.-L. Cheng, W. F. Pong, Y. C. Shao, Y. Y. Chin, H.-J. Lin, C. W. Chen, J.-R. Yang, C. H. Chen, and M.-W. Chu Using atomically resolved electron energy-loss spectroscopy, the atomic-plane-by-atomic-plane, unit-cell-by-unit-cell stoichiometry, and charge characteristics of the oxide interface (Nd 0.35 Sr 0.65 )MnO 3 /SrTiO 3 , with a primitive polar discontinuity of (Nd 0.35 Sr 0.65 O) 0.35+ -(TiO 2 ) 0 , were thoroughly inve... [Phys. Rev. B 87, 075129] Published Tue Feb 19, 2013

Description: Author(s): S. Tonegawa, K. Hashimoto, K. Ikada, Y. Tsuruhara, Y.-H. Lin, H. Shishido, Y. Haga, T. D. Matsuda, E. Yamamoto, Y. Onuki, H. Ikeda, Y. Matsuda, and T. Shibauchi The observation of cyclotron resonance in ultraclean crystals of URu2Si2 [S. Tonegawa et al. , Phys. Rev. Lett. 109 , 036401 (2012)10.1103/PhysRevLett.109.036401] provides another route besides quantum oscillations to the determination of the bulk electronic structure in the hidden-order phase. We rep... [Phys. Rev. B 88, 245131] Published Mon Dec 30, 2013

Description: Author(s): H. C. Wu, K. Devi Chandrasekhar, J. K. Yuan, J. R. Huang, J.-Y. Lin, H. Berger, and H. D. Yang Compared to the previous report on C u 3 Bi ( Se O 3 ) 2 O 2 X ( X = Cl , Br ) [V. Gnezdilov et al. , ( arXiv:1604.04249 )],where no dielectric anomaly was observed without magnetic field near T N ∼ 25.6 K , we further present the dielectric behaviors without and with magnetic field in C u 3 Bi ( Se O 3 ) 2 O 2 Cl . At zero field H = 0 , an… [Phys. Rev. B 95, 125121] Published Wed Mar 15, 2017

Description: Author(s): K. Devi Chandrasekhar, J. Krishna Murthy, J.-Y. Lin, H. C. Wu, W. J. Tseng, A. Venimadhav, and H. D. Yang The magnetic phase diagram of N i 1 − x Z n x C r 2 O 4 demonstrates complex magnetic transitions for x = 0.05 with two long-range magnetic-order transitions at T C 1 = 41 K and T C 2 = 17 K . A glasslike feature emerges between T C 1 and T C 2 with the application of a direct current (dc) magnetic field in alternating current … [Phys. Rev. B 94, 205143] Published Mon Nov 28, 2016

Description: The first Clouds and the Earth's Radiant Energy System (CERES) instrument will be launched on the Tropical Rainfall Measuring Mission (TRMM) spacecraft from a Japanese launch site in November 1997. This instrument is a follow-on to the Earth Radiation Budget Experiment (ERBE) begun in the 1980's. The instrument will measure the radiation budget - incoming and outgoing radiant energy - of the Earth. It will establish a baseline and look for climatic trends. The major feature of interest is clouds, which play a very strong role in regulating our climate. CERES will identify clear and cloudy regions and determine cloud physical and microphysical properties using imager data from a companion instrument. Validation efforts for the remote sensing algorithms will be intensive. As one component of the validation, the S'COOL (Students' Cloud Observations On-Line) project will involve school children from around the globe in making ground truth measurements at the time of a CERES overpass. Their observations will be collected at the NASA Langley Distributed Active Archive Center (DAAC) and made available over the Internet for educational purposes as well as for use by the CERES Science Team in validation efforts. Pilot testing of the S'COOL project began in January 1997 with two local schools in Southeastern Virginia and one remote site in Montana. This experience is helping guide the development of the S'COOL project. National testing is planned for April 1997, international testing for July 1997, and global testing for October 1997. In 1998, when the CERES instrument is operational, a global observer network should be in place providing useful information to the scientists and learning opportunities to the students.

Description: Current and future earth observation programs depend on satellite measurements of radiance to retrieve the properties of clouds on a global basis. At present, this retrieval is made assuming that the clouds in the instrument field of view are plane parallel and independent of adjacent pixels. While this assumption is known to be false except in very limited cases, its impact can be evaluated, and if possible corrected, based on emerging theoretical techniques. In this study, the Spherical Harmonic Discrete Ordinate Method (SHDOM, Evans, 1996) has been used to assess the sensitivity of the retrieval to a variety of cloud parameters. SHDOM allows the plane parallel assumption to be relaxed and makes 2D and even 3D radiative solutions practical. A previous study (Chambers et al., 1996) assessed the effect of horizontal inhomogeneity in 45 LANDSAT scenes of boundary layer clouds over ocean. The four scenes studied here represent overcast, broken, scattered and strongly thermally forced cloud fields and are used to perform sensitivity studies to a wider variety of parameters. Comparisons are made at three solar zenith angles (theta (sub 0) = 0, 49, and 63 degrees) to avoid ambiguity in the results due to solar zenith angle.

Description: As part of NASA's Mission to Planet Earth, the first Clouds and the Earth's Radiant Energy System (CERES) instrument will be launched on the Tropical Rainfall Measuring Mission (TRMM) spacecraft from the Tanegashima launch site in Japan in November 1997. The instrument will measure the radiation budget incoming and outgoing radiant energy - of the Earth. The major feature of interest is clouds, which play a very strong role in regulating our climate. CERES will identify clear and cloudy regions and determine cloud physical and microphysical properties using imager data from a companion instrument. Validation efforts for the remote sensing algorithms will be intensive. As one component of the validation, the S'COOL (Students' Cloud Observations On-Line) project will involve school children around the globe in making ground truth measurements at the time of a CERES overpass. They will report cloud type, height, fraction, and opacity, as well as the local surface conditions. Their observations will be collected at the NASA Langley Distributed Active Archive Center (DAAC) and made available over the Internet for educational purposes as well as for use by the CERES Science Team in validation efforts. Pilot testing of the S'COOL project began in January 1997 with two local schools in Southeastern Virginia and one remote site in Montana. National testing in April 1997 involved 8 schools (grades 3 to high school) across the United States. Global testing will be carried out in October 1997. Details of the S'COOL project, which is mainly Internet-based, are being developed in each of these phases according to feedback received from participants. In 1998, when the CERES instrument is operational, a global observer network should be in place providing useful information to the scientists and learning opportunities to the students. Broad participation in the S'COOL project is planned, both to obtain data from a wide range of geographic areas, and to involve as many students as possible in learning about clouds and atmospheric science. This paper reports on the development phase of the S'COOL project, including the reaction of the teachers and students who have been involved. It describes the operational state of the S'COOL network, and identifies opportunities for additional participants.

Description: Under the auspices of the Department of Education's No Child Left Behind (NCLB) Act, beginning in 2007 students will be tested in the science area. There are many techniques that educators can employ to teach students science. The use of authentic materials or in this case authentic data can be an engaging alternative to more traditional methods. An Earth science classroom is a great place for the integration of authentic data and science concepts. The National Aeronautics and Space Administration (NASA) has a wealth of high quality Earth science data available to the general public. For instance, the Atmospheric Science Data Center (ASDC) at NASA s Langley Research Center houses over 800 Earth science data sets related to Earth's radiation budget, clouds, aerosols and tropospheric chemistry. These data sets were produced to increase academic understanding of the natural and anthropogenic factors that influence global climate; however, a major hurdle in using authentic data is the size of the data and data documentation. To facilitate the use of these data sets for educational purposes, the Mentoring and inquirY using NASA Data on Atmospheric and Earth science for Teachers and Amateurs (MY NASA DATA) project has been established to systematically support educational activities at all levels of formal and informal education. The MY NASA DATA project accomplishes this by reducing these large data holdings to microsets that are easily accessible and explored by K-12 educators and students though the project's Web page. MY NASA DATA seeks to ease the difficulty in understanding the jargon-heavy language of Earth science. This manuscript will show how MY NASA DATA provides resources for NCLB implementation in the science area through an overview of the Web site, the different microsets available, the lesson plans and computer tools, and an overview of educational support mechanisms.