378,499 research outputs found
The Occurrence and Seasonal Variations of Na, K, Ca, Mg and Heavy Metals in Taiwan's Oysters and Clams
No full textEstimations of tidal characteristics and aquifer parameters via tide-induced head changes in coastal observation wells
Full text linkThe groundwater fluctuations due to tidal variations at an observation well in a coastal aquifer can be used to determine the tidal characteristics and aquifer parameters without conducting an aquifer test. In this study, a method, comprised of Jeng et al.'s solution (2005) and simulated annealing (SA) algorithm, is developed to determine the coastal aquifer parameters (hydraulic diffusivity, beach slope, and aquifer thickness) as well as the tidal characteristics (bichromatic-tide amplitudes, bichromatic-tide wave frequencies, and tidal phase lag) from the analysis of the tide-induced well-water-level (WWL) data. The synthetic WWL data generated from Jeng et al.'s solution (2005) with assumed parameter values and field data obtained from Barrenjoey beach, Australia, are analyzed. The estimated parameter values obtained from analyzing synthetic WWL data by the present method show good agreements with the previously assumed parameter values. The parameter estimation procedure may however fail in the case of a large shallow water parameter which in fact violates the constraint on the use of Jeng et al.'s solution (2005). In the analysis of field WWL data, the results indicate that the aquifer parameters estimated from the present method with single or multiple well data are significantly different from those given in Nielsen (1990). Inspecting the observed WWL data and the WWL data predicted from Jeng et al.'s solution (2005) reveals that the present method may provide better estimations for the aquifer parameters than those given in Nielsen (1990)
The Effects of Salts and Nucleotide Triphosphates on the Transcription Termination of Bacteriophage RNA Polymerases
No full textFigures 2-6 from: Jeng M, Engel M, Yang P (2011) Discovery of the female of Pyrocoelia prolongata in Taiwan (Coleoptera, Lampyridae). ZooKeys 116: 49-57. https://doi.org/10.3897/zookeys.116.1412
No full textFigures 2-6 - Pyrocoelia prolongata Jeng and Lai, female 2 Antenna 3 Partial head in frontal aspect (frons, antennal sockets, clypeus-labrum, and mandibles), antennae removed 4 Hind leg (metatrochanter–metatarsus) 5 Thoracic segments (TH1–3), coxae (CX1–3), and first abdominal segment (AB1), lateral aspect; sp (#) = spiracle on #th segment 6 Abdominal segments 6–8, ventral aspect, T#, P#, and S# = abdominal tergite, pleurite, and sternite of #th segment; PO = photogenic organs
Development of composite calibration standard for quantitative NDE by ultrasound and thermography
Full text linkInspection of aircraft components for damage utilizing ultrasonic Non-Destructive Evaluation (NDE) is a time intensive endeavor. Additional time spent during aircraft inspections translates to added cost to the company performing them, and as such, reducing this expenditure is of great importance. There is also great variance in the calibration samples from one entity to another due to a lack of a common calibration set. By characterizing damage types, we can condense the required calibration sets and reduce the time required to perform calibration while also providing procedures for the fabrication of these standard sets. We present here our effort to fabricate composite samples with known defects and quantify the size and location of defects, such as delaminations, and impact damage. Ultrasonic and Thermographic images are digitally enhanced to accurately measure the damage size. Ultrasonic NDE is compared with thermography.This proceeding may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing.
This proceeding appeared in Dayal, Vinay, Zach G. Benedict, Nishtha Bhatnagar, and Adam G. Harper. "Development of composite calibration standard for quantitative NDE by ultrasound and thermography." In AIP Conference Proceedings, vol. 1949, no. 1, p. 060006. AIP Publishing LLC, 2018, and may be found at
DOI: 10.1063/1.5031552.
Copyright 2018 The Author(s).
Posted with permission
Oculogryphus, A Remarkable New Genus of Fireflies from Asia (Coleoptera: Lampyridae)
No full textFig. 5. Oculogryphus fulvus, new genus and species, male, basal half of elytra, lateral aspect.Published as part of JENG, M.-L., ENGEL, MICHAEL S. & YANG, P.-S., 2007, Oculogryphus, A Remarkable New Genus of Fireflies from Asia (Coleoptera: Lampyridae), pp. 1-20 in American Museum Novitates 3600 on page 7, DOI: 10.1206/0003-0082(2007)3600[1:OARNGO]2.0.CO;2, http://zenodo.org/record/538905
Observations of Bºs→ψ(2S)η and Bº(s)→ψ(2S)π+π- decays
Full text linkFirst observations of the B0s
→ψ(2S)η, B0 →ψ(2S)π
+
π
− and B0s
→ψ(2S)π
+
π
− decays are made
using a dataset corresponding to an integrated luminosity of 1.0 fb−1 collected by the LHCb experiment in
proton–proton collisions at a centre-of-mass energy of
√
s = 7 TeV. The ratios of the branching fractions
of each of the ψ(2S) modes with respect to the corresponding J/ψ decays are
B(B0s
→ψ(2S)η)
÷
B(B0s
→J/ψη)
= 0.83± 0.14 (stat)±0.12 (syst) ±0.02 (B),
;
B(B0→ψ(2S)π
+
π
−
)
÷
B(B0→J/ψπ
+
π
−
)
= 0.56± 0.07 (stat)±0.05 (syst)± 0.01 (B),
;
B(B0s
→ψ(2S)π
+
π
−
)
÷
B(B0s
→J/ψπ
+
π
−
)
= 0.34± 0.04 (stat)±0.03 (syst)± 0.01 (B),
where the third uncertainty corresponds to the uncertainties of the dilepton branching fractions of the J/ψ
and ψ(2S) meson decays
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