36,317 research outputs found
Elastic analysis of bridge structures by the finite element method
Imperial Users onl
Chemical Control of Mango Anthracnose in Malaysia. In vitro Fungitoxicity of Selected Chemicals
Fifteen fungicides and two commercial formulations of the insecticicie, dicrotophos, were investigated
for in vitro fungitoxicity against mango anthracnose pathogen, Colletotrichum gloeosporioides.
Among the fungicides tested, the pathogen was extremely sensitive to the thiophanate, the bellzimidazoles
and two of the N-trichloromethylthio group of fungitoxicants which exhibited ED so of less than 5 pg/ml.
The dithiocarbamates varied in their degree of toxicity, with ED so ranging from 100 pg/ml to 580 pg/ml.
The two miscellaneous fungicides, chlorothalonil and iprodione alld the two insecticides showed extremely
low and negligible fungitoxicity, repectively. Similarities and differences between and within groups of
fungicides tested are further discussed in relation to their chemical structures, biochemical modes of actions
and formulations
Measurement of Spin Polarization by Andreev Reflection in Ferromagnetic In1-xMnxSb Epilayers
We carried out Point Contact Andreev Reflection (PCAR) spin spectroscopy
measurements on epitaxially-grown ferromagnetic In1-xMnxSb epilayers with a
Curie temperature of ~9K. The spin sensitivity of PCAR in this material was
demonstrated by parallel control studies on its non-magnetic analog,
In1-yBeySb. We found the conductance curves of the Sn point contacts with
In1-yBeySb to be fairly conventional, with the possible presence of
proximity-induced superconductivity effects at the lowest temperatures. The
experimental Z-values of interfacial scattering agreed well with the estimates
based on the Fermi velocity mismatch between the semiconductor and the
superconductor. These measurements provided control data for subsequent PCAR
measurements on ferromagnetic In1-xMnxSb, which indicated spin polarization in
In1-xMnxSb to be 52 +- 3%
Enhancement of plasticity in Ti-based metallic glass matrix composites by controlling characteristic and volume fraction of primary phase
In this study, Ti-based metallic glass matrix composites with high plasticity have been developed by controlling characteristic and volume fraction of primary phase embedded in the glass matrix. By careful alloy design procedure, the compositions of ß/glass phases, which are in metastable equilibrium have been properly selected, therefore the mechanical properties can be tailored by selecting the alloy compositions between the composition of ß and glass phases. The relation between the compressive yield strength and volume fraction of ß phase is well described using the rule of mixtures
Behavioral Changes Without Respiratory Symptoms as a Presenting Sign of COVID-19 Encephalitis.
The clinical presentation, diagnosis, and treatment of coronavirus disease 2019 (COVID-19) encephalitis are still being characterized. Few case reports describing COVID-19 encephalitis are available in the literature. We present a case of COVID-19 encephalitis who presented with behavioral disturbances without respiratory symptoms
Programmable trap geometries with superconducting atom chips
We employ the hysteretic behavior of a superconducting thin film in the
remanent state to generate different traps and flexible magnetic potentials for
ultra-cold atoms. The trap geometry can be programmed by externally applied
fields. This new approach for atom-optics is demonstrated by three different
trap types realized on a single micro-structure: a Z-type trap, a double trap
and a bias field free trap. Our studies show that superconductors in the
remanent state provide a new versatile platform for atom-optics and
applications in ultra-cold quantum gases
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