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Showing 13 to 24 of 45331 entries
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Integrating technology in STEM education

STEM education program evaluation

Zhao J.
GSID: sQvaLbhbVecJ
P Chacko, S Appelbaum, H Kim, J Zhao… - … and Science Education, 2015 - jotse.org

Students have access to the Internet at their fingertips via e-tablets and smart phones. However, the STEM fields are struggling to remain relevant in students’ lives outside the classroom…

BCN nanotubes as highly sensitive torsional electromechanical transducers.

Nano letters

Garel J, Zhao C, Popovitz-Biro R, Golberg D, Wang W, Joselevich E.
PMID: 25275220
Nano Lett. 2014 Nov 12;14(11):6132-7. doi: 10.1021/nl502161h. Epub 2014 Oct 02.

Owing to their mechanically tunable electronic properties, carbon nanotubes (CNTs) have been widely studied as potential components for nanoelectromechanical systems (NEMS); however, the mechanical properties of multiwall CNTs are often limited by the weak shear interactions between the graphitic...

Ionic-passivated FeS2 photocapacitors for energy conversion and storage.

Chemical communications (Cambridge, England)

Gong M, Kirkeminde A, Kumar N, Zhao H, Ren S.
PMID: 23995298
Chem Commun (Camb). 2013 Oct 18;49(81):9260-2. doi: 10.1039/c3cc45088k.

A solid-state photocapacitor is prepared, utilizing iron pyrite (FeS2) as both the photoactive material and blocking electrode, which exhibits a high performance near-infrared (NIR) photodetectivity of 1.6 × 10(11) Jones, an energy density of 1.13 × 10(4) J g(-1)...

Diode-pumped actively Q-switched Tm, Ho:GdVO4/BaWO4 intracavity Raman laser at 2533 nm.

Optics letters

Zhao J, Zhang X, Guo X, Bao X, Li L, Cui J.
PMID: 23595432
Opt Lett. 2013 Apr 15;38(8):1206-8. doi: 10.1364/OL.38.001206.

A compact diode-end-pumped actively Q-switched intracavity Raman laser with Tm,Ho:GdVO(4) laser gain medium and BaWO(4) Raman gain crystal is demonstrated for the first time. The Raman threshold is as low as 2.0 W of diode power at 802 nm....

Strong infrared photoluminescence from black silicon made with femtosecond laser irradiation.

Optics letters

Lü Q, Wang J, Liang C, Zhao L, Jiang Z.
PMID: 23595456
Opt Lett. 2013 Apr 15;38(8):1274-6. doi: 10.1364/OL.38.001274.

Strong infrared photoluminescence (PL) was observed for the first time from black Si (b-Si) formed by femtosecond laser irradiation and treated by rapid thermal annealing. The PL peak energy changes from 0.78 to 0.84 eV (1.59 to 1.48 μm)...

A new vapor-phase hydrothermal method to concurrently grow ZnO nanotube and nanorod array films on different sides of a zinc foil substrate.

Chemistry (Weinheim an der Bergstrasse, Germany)

Zhang H, Li Y, Liu P, Li Y, Yang D, Yang H, Zhao H.
PMID: 22431374
Chemistry. 2012 Apr 23;18(17):5165-9. doi: 10.1002/chem.201200036. Epub 2012 Mar 19.

No abstract available.

Weighted random subspace method for high dimensional data classification.

Statistics and its interface

Li X, Zhao H.
PMID: 21918713
Stat Interface. 2009;2(2):153-159. doi: 10.4310/sii.2009.v2.n2.a5.

High dimensional data, especially those emerging from genomics and proteomics studies, pose significant challenges to traditional classification algorithms because the performance of these algorithms may substantially deteriorate due to high dimensionality and existence of many noisy features in these...

Fabrication of colloidal photonic crystal heterostructures free of interface imperfection based on solvent vapor annealing.

Journal of colloid and interface science

Liu X, Zhao D, Geng C, Zhang L, Tan T, Hu M, Yan Q.
PMID: 25170602
J Colloid Interface Sci. 2014 Nov 15;434:98-103. doi: 10.1016/j.jcis.2014.07.006. Epub 2014 Aug 13.

We describe the transformation of a colloidal photonic crystal into a photonic crystal heterostructure. It was achieved by annealing a polystyrene multilayer colloidal photonic crystal partially immersed in water using a solvent vapor. The floating polystyrene colloidal photonic crystal...

Isolation of avian influenza virus (H9N2) from emu in China.

Irish veterinary journal

Kang W, Pang W, Hao J, Zhao D.
PMID: 21851680
Ir Vet J. 2006 Mar 01;59(3):148-52. doi: 10.1186/2046-0481-59-3-148.

This is the first reported isolation of avian influenza virus (AIV) from emu in China. An outbreak of AIV infection occurred at an emu farm that housed 40 four-month-old birds. Various degrees of haemorrhage were discovered in the tissues...

Specific heat evidence for bulk s-wave gap symmetry of optimally electron-doped Pr(1.85)Ce(0.15)CuO(4-y) superconductors.

Journal of physics. Condensed matter : an Institute of Physics journal

Zhao GM, Wang J.
PMID: 21403275
J Phys Condens Matter. 2010 Sep 08;22(35):352202. doi: 10.1088/0953-8984/22/35/352202. Epub 2010 Aug 02.

We reanalyze specific heat data for optimally electron-doped Pr(1.85)Ce(0.15)CuO(4-y) superconductors. The magnetic field dependence of the electronic specific heat in the vortex state does not support d-wave gap symmetry but agrees quantitatively with an s-wave theory. Furthermore, the field...

Average capacity for optical wireless communication systems over exponentiated Weibull distribution non-Kolmogorov turbulent channels.

Applied optics

Cheng M, Zhang Y, Gao J, Wang F, Zhao F.
PMID: 24979434
Appl Opt. 2014 Jun 20;53(18):4011-7. doi: 10.1364/AO.53.004011.

We model the average channel capacity of optical wireless communication systems for cases of weak to strong turbulence channels, using the exponentiation Weibull distribution model. The joint effects of the beam wander and spread, pointing errors, atmospheric attenuation, and...

Measurement and reconstruction of three-dimensional configurations of specimen with tiny scattering based on digital holographic tomography.

Applied optics

Chen X, Zhao J, Wang J, Di J, Wu B, Liu J.
PMID: 24979439
Appl Opt. 2014 Jun 20;53(18):4044-8. doi: 10.1364/AO.53.004044.

Based on digital holographic tomography, a method for measuring the three-dimensional (3D) configuration of a transparent object with tiny scattering is proposed. By rotating a Michelson interferometer around static specimen, a series of the phase change distributions of reconstructed...

Showing 13 to 24 of 45331 entries