Efficiency of end effect probes for in-situ permittivity measurements in the 0.5–6GHz frequency range and their application for organic soil horizons study

2017 ◽  
Vol 254 ◽  
pp. 78-88 ◽  
Author(s):  
François Demontoux ◽  
Stephen Razafindratsima ◽  
Simone Bircher ◽  
Gilles Ruffié ◽  
Fabrice Bonnaudin ◽  
...  
Keyword(s):  
Organic Soil ◽  
Frequency Range ◽  
End Effect ◽  
Soil Horizons ◽  
Permittivity Measurements

Lead migration in smelter-impacted deciduous and coniferous organic soil horizons based on a long-term in-situ implantation and laboratory column experiments

2014 ◽  
Vol 48 ◽  
pp. 168-175 ◽  
Author(s):  
Vladislav Chrastný ◽  
Aleš Vaněk ◽  
Eva Čadková ◽  
Alice Růžičková ◽  
Ivana Galušková ◽  
...  
Keyword(s):  
Organic Soil ◽  
Column Experiments ◽  
Soil Horizons ◽  
Laboratory Column

Non-intrusive in-situ permittivity measurements dedicated to the development of a P and L band dielectric model of wood

2021 ◽  
Author(s):  
F. Demontoux ◽  
M. Gati ◽  
M. el Boudali ◽  
L. Villard ◽  
JP Wigneron ◽  
...  
Keyword(s):  
Dielectric Model ◽  
L Band ◽  
Permittivity Measurements

A RAPID TECHNIQUE FOR DRYING ORGANIC SOIL HORIZONS USING A MICROWAVE OVEN

Soil Science ◽  
1992 ◽  
Vol 154 (5) ◽  
pp. 420-425 ◽  
Author(s):  
M. M. HARRIS ◽  
L. O. SAFFORD
Keyword(s):  
Organic Soil ◽  
Microwave Oven ◽  
Soil Horizons ◽  
Rapid Technique

Effects of long-term nitrogen addition on phosphorus cycling in organic soil horizons of temperate forests

2018 ◽  
Vol 141 (2) ◽  
pp. 167-181 ◽  
Author(s):  
Christine Heuck ◽  
Georg Smolka ◽  
Emily D. Whalen ◽  
Serita Frey ◽  
Per Gundersen ◽  
...  
Keyword(s):  
Temperate Forests ◽  
Nitrogen Addition ◽  
Organic Soil ◽  
Phosphorus Cycling ◽  
Soil Horizons

Research on the dynamic characteristic of semi-active hydraulic damping strut

2019 ◽  
Vol 234 (6) ◽  
pp. 1779-1791 ◽  
Author(s):  
Daoyong Wang ◽  
Wencan Zhang ◽  
Mu Chai ◽  
Xiaguang Zeng
Keyword(s):  
Degrees Of Freedom ◽  
Dynamic Stiffness ◽  
Low Frequency ◽  
Maxwell Model ◽  
Friction Model ◽  
Damping Capacity ◽  
Frequency Range ◽  
Stiffness Model ◽  
Rubber Bushing

To reduce the vibration and shock of powertrain in the process of engine key on/off and vehicle in situ shift, a novel semi-active hydraulic damping strut is developed. The purpose of this paper is to study and discuss the dynamic stiffness model of the semi-active hydraulic damping strut. In this study, the dynamic characteristics of semi-active hydraulic damping strut were analyzed based on MTS 831 test rig first. Then, the dynamic stiffness model of semi-active hydraulic damping strut was established based on 2 degrees of freedom vibration system. In this research, a linear, fractional derivative and friction model was used to represent the nonlinear rubber bushing characteristic; the Maxwell model was used to describe the semi-active hydraulic damping strut body model; and the parameters of rubber bushing and semi-active hydraulic damping strut body were identified. The dynamic stiffness values were calculated with solenoid valve energized and not energized at amplitudes of 1 mm and 4 mm, which were consistent with experimental results in low-frequency range. Furthermore, the simplified dynamic stiffness model of the semi-active hydraulic damping strut was discussed, which showed that bushing can be ignored in low-frequency range. Then, the influence of equivalent spring stiffness, damping constant, and rubber bushing stiffness on the stiffness and damping capacity of the semi-active hydraulic damping strut were analyzed. Finally, the prototype of the semi-active hydraulic damping strut was developed and designed based on the vehicle in situ shift and engine key on/off situations, and experiments of the vehicle with and without semi-active hydraulic damping strut were carried out to verify its function.

Hypholoma lateritiumisolated from coarse woody debris, the forest floor, and mineral soil in a deciduous forest in New Hampshire

Botany ◽  
2012 ◽  
Vol 90 (6) ◽  
pp. 457-464 ◽  
Author(s):  
Therese A. Thompson ◽  
R. Greg Thorn ◽  
Kevin T. Smith
Keyword(s):  
New Hampshire ◽  
Deciduous Forest ◽  
Repetitive Sequences ◽  
Mineral Soil ◽  
Acer Rubrum ◽  
Organic Soil ◽  
Nuclear Ribosomal Dna ◽  
Soil Horizon ◽  
Soil Horizons ◽  
Internal Transcribed Spacer Region

Fungi in the Agaricomycetes (Basidiomycota) are the primary decomposers in temperate forests of dead wood on and in the forest soil. Through the use of isolation techniques selective for saprotrophic Agaricomycetes, a variety of wood decay fungi were isolated from a northern hardwood stand in the Bartlett Experimental Forest, New Hampshire, USA. In particular, Hypholoma lateritium (Schaeff.: Fr.) P. Kumm. was isolated from basidiocarps, decaying Acer rubrum L. logs, the Oe organic soil horizon, and the E and BC mineral soil horizons. Identification was confirmed by sequence analysis of the internal transcribed spacer region of nuclear ribosomal DNA. All isolates had identical sequences in this region to previously published sequences for the species; some were monokaryotic and simple-septate and others were dikaryotic, with clamp connections. Isolates were further characterized by banding patterns (DNA fingerprints) produced with PCR primers based in simple repetitive sequences and the minisatellite M13. Nine dikaryotic isolates from basidiocarps and from soil horizons Oe, E, and BC had identical fingerprint patterns with all primers tested. The confirmed presence of H. lateritium suggests that this fungus could form a mycelial translocation network that bridges mineral and organic soil horizons and decaying logs.

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