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Tsay, S.C.,Hsu, N.C.,Lau, W.K.M.,Li, C.,Gabriel, P.M.,Ji, Q.,Holben, B.N.,Judd Welton, E.,Nguyen, A.X.,Janjai, S.,Lin, N.H.,Reid, J.S.,Boonjawat, J.,Howell, S.G.,Huebert, B.J.,Fu, J.S.,Hansell, R.A.,S Pergamon Press ; Elsevier [distribution] 2013 Atmospheric environment Vol.78 No.-
In this paper, we present recent field studies conducted by NASA's SMART-COMMIT (and ACHIEVE, to be operated in 2013) mobile laboratories, jointly with distributed ground-based networks (e.g., AERONET, http://aeronet.gsfc.nasa.gov/ and MPLNET, http://mplnet.gsfc.nasa.gov/) and other contributing instruments over northern Southeast Asia. These three mobile laboratories, collectively called SMARTLabs (cf. http://smartlabs.gsfc.nasa.gov/, Surface-based Mobile Atmospheric Research &Testbed Laboratories) comprise a suite of surface remote sensing and in-situ instruments that are pivotal in providing high spectral and temporal measurements, complementing the collocated spatial observations from various Earth Observing System (EOS) satellites. A satellite-surface perspective and scientific findings, drawn from the BASE-ASIA (2006) field deployment as well as a series of ongoing 7-SEAS (2010-13) field activities over northern Southeast Asia are summarized, concerning (i) regional properties of aerosols from satellite and in-situ measurements, (ii) cloud properties from remote sensing and surface observations, (iii) vertical distribution of aerosols and clouds, and (iv) regional aerosol radiative effects and impact assessment. The aerosol burden over Southeast Asia in boreal spring, attributed to biomass burning, exhibits highly consistent spatial and temporal distribution patterns, with major variability arising from changes in the magnitude of the aerosol loading mediated by processes ranging from large-scale climate factors to diurnal meteorological events. Downwind from the source regions, the tightly coupled-aerosol-cloud system provides a unique, natural laboratory for further exploring the micro- and macro-scale relationships of the complex interactions. The climatic significance is presented through large-scale anti-correlations between aerosol and precipitation anomalies, showing spatial and seasonal variability, but their precise cause-and-effect relationships remain an open-ended question. To facilitate an improved understanding of the regional aerosol radiative effects, which continue to be one of the largest uncertainties in climate forcing, a joint international effort is required and anticipated to commence in springtime 2013 in northern Southeast Asia.
A BINARY OBSERVING PROJECT ON THE NCUO SPECKLE INTERFEROMETER
TSAY WEAN-SHUN,KUO HUI-JEAN,CHAN PEI-CHING The Korean Astronomical Society 1996 Journal of The Korean Astronomical Society Vol.29 No.suppl1
Speckle Interferometer equipped with an ITT intensified CCD have been used on the NCUO ( National Central University Observatory, Taiwan) 24-inch telescope for studying the orbits of bright binary systems selected from the Yale's Bright Star Catalogue. The high resolution and high sensitivity ITT intensified solid state video camera ( F4577 ) has external gain and gate control functions which will simplify the design of the speckle camera and allow us to do precise speckle photometry. The goal of this project is trying to study the bright binary systems with separations between the average size of seeing disk and the diffraction limit of the 24-inch telescope. Recently some observing data have been reduced and compared with the other teams' results. We are now improving the data reduction technology and trying to use real time observing mode on the monthly routine observation.
Influence of neutron irradiation and ageing on behavior of SAV-1 reactor alloy
Tsay, K.V.,Rofman, O.V.,Kudryashov, V.V.,Yarovchuk, A.V.,Maksimkin, O.P. Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.10
This study observed the effect of neutron irradiation and ageing on the microstructure, hardness, and corrosion resistance of SAV-1 (Al-Mg-Si) alloy. The investigated material was irradiated with neutrons to fluences of 10<sup>21</sup>-10<sup>26</sup> n/m<sup>2</sup> in the WWR-K research reactor and kept in dry storage. Long-term irradiation led to an increase in hardness of the alloy and a deterioration of pitting corrosion resistance. Post-irradiation ageing for 1 h at 100-300 ℃ resulted in a decrease in microhardness of the irradiated SAV-1. The effect of post-irradiation ageing on pitting corrosion was made clear through the formation of Guinier-Preston zones and secondary precipitates in the Al matrix. Ageing at 250 ℃ corresponded to the development of stable microstructure and the highest corrosion resistance for the irradiated samples. Mg<sub>2</sub>Si, Si, and needle-shaped β" precipitates were formed in SAV-1 alloy that was irradiated with low fluences. β" and clusters of rod-shaped B-type precipitates were observed in highly irradiated samples. The precipitates were similar to those seen in non-irradiated pseudo-binary Al-Mg<sub>2</sub>Si alloys with Si excess.
Tsay, Olga G.,Manjare, Sudesh T.,Kim, Hyungjun,Lee, Kang Mun,Lee, Yoon Sup,Churchill, David G. American Chemical Society 2013 Inorganic Chemistry Vol.52 No.17
<P>A novel reversible zinc(II) chemosensing ensemble (<B>2</B>·Zn<SUP>2+</SUP>) allows for selective “turn-on” fluorescence sensing of ATP and PPi in aqueous media (detection limits: 2.4 and 1.0 μM, respectively) giving selective binding patterns: ATP ∼ PPi > ADP ≫ AMP > monophosphates ≈ remaining ions tested. The conjugated hydrazone [CN<I>NH</I>R] resists hydrolysis considerably, compared to the imine [CN<I>CH</I><SUB><I>2</I></SUB>R, pyridin-2-ylmethanamine] functionality, and generalizes to other chemosensing efforts. Prerequisite Zn<SUP>2+</SUP>·[O<SUB>phenol</SUB>N<SUB>imine</SUB>N<SUB>pyr</SUB>] binding is selective, as determined by UV–vis and NMR spectroscopy; ATP or PPi extracts Zn<SUP>2+</SUP> to regenerate the ligand–fluorophore conjugate (PPi: turn-on, 512 nm; detection limit, 1.0 μM). Crystallography, 2-D NMR spectroscopy, and DFT determinations (B3LYP/631g*) support the nature of compound <B>2</B>. 2-Hydrazinyl-pyridine-salicylaldehyde conjugation is unknown, as such; a paucity of chemosensing-Zn<SUP>2+</SUP> binding reports underscores the novelty of this modifiable dual cation/anion detection platform. A combined theoretical and experimental approach reported here allows us to determine both the potential uniqueness as well as drawbacks of this novel conjugation.</P><P>A chemosensing ensemble, involving conjugated hydrazone [CN<I>NH</I>R], greatly resists hydrolysis to allow for reversible and selective “turn-on” fluorescence sensing of ATP and PPi in aqueous media: ATP ∼ PPi > ADP ≫ AMP > monophosphates ≈ others.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/inocaj/2013/inocaj.2013.52.issue-17/ic4013526/production/images/medium/ic-2013-013526_0011.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ic4013526'>ACS Electronic Supporting Info</A></P>
Chien-Yie Tsay,Wen-Che Lee 한국물리학회 2013 Current Applied Physics Vol.13 No.1
Undoped, Ga-, In-, Zr-, and Sn-doped ZnO transparent semiconductor thin films were deposited on alkalifree glasses by solegel method. 2-methoxyethanol (2-ME) and diethanolamine (DEA) were chosen as a solvent and a stabilizer, respectively. The doping concentrationwas maintained at 2 at.% in the impurity doping precursor solutions. The effects of different dopants on the structural, optical, and electrical properties of ZnO thin films were investigated. XRD results show that all annealed ZnO-based thin films had a hexagonal (wurtzite) structure. ZnO thin films doped with impurity elements obviously improved the surface flatness and enhanced the optical transmittance. All impurity doped ZnO thin films showed high transparency in the visible range (>91%). The Ga- and In- doped ZnO thin films exhibited higher Hall mobility and lower resistivity than did the undoped ZnO thin film.
Low Temperature Deposition of ZnO Semiconductor Thin Films on a PEN Substrate by a Solution Process
Chien-Yie Tsay,Pei-Wen Wu 대한금속·재료학회 2013 ELECTRONIC MATERIALS LETTERS Vol.9 No.4
Low-temperature processed ZnO semiconductor films were deposited onto polyethylene naphthalate (PEN)plastic substrates by a spin coating technique using ZnO nanoparticle (NP) dispersion. The ZnO nanoparticles (NPs) were synthesized by the hydrothermal method, and solution processable dispersion was used to disperse the ZnO NPs in a mixed aqueous solution with a polyvinylpyrrolidone (PVP) dispersant agent. The effects of annealing temperature (from 150°C to 250°C) on the electrical properties of glass/ZnO film samples are reported. The optimized annealing condition (200°C) was applied for ZnO film deposited on a PEN substrate. Comparative electrical properties of the PEN/ZnO film samples before and after bending tests are also presented. Experimental results show that the electrical resistivity of the PEN/ZnO film sample was 1.91 × 104 Ω cm with a Hall mobility of 45.9 cm2/Vs. After bending tests, the electrical resistivity was raised to 1.26 × 105Ω cm and the Hall mobility was reduced to 31.0 cm2/Vs.