Results 31 to 40 of about 661,571 (355)

Integrated Electronic Transport and Thermometry at milliKelvin Temperatures and in Strong Magnetic Fields [PDF]

open access: yes, 2011
We fabricated a He-3 immersion cell for transport measurements of semiconductor nanostructures at ultra low temperatures and in strong magnetic fields. We have a new scheme of field-independent thermometry based on quartz tuning fork Helium-3 viscometry ...
Csathy, G. A.   +5 more
core   +3 more sources

Reinvestigating the Parabolic-Shaped Eddy Viscosity Profile for Free Surface Flows

open access: yesHydrology, 2021
The flow in rivers is turbulent. The main parameter related to turbulence in rivers is the eddy viscosity, which is used to model a turbulent flow and is involved in the determination of both velocities and sediment concentrations.
Rafik Absi
doaj   +1 more source

Probing viscoelastic properties of a thin polymer film sheared between a beads layer and quartz crystal resonator [PDF]

open access: yes, 2009
We report measurements of viscoelastic properties of thin polymer films of 10-100 nm at the MHz range. These thin films are confined between a quartz crystal resonator and a millimetric bead layer, producing an increase of both resonance frequency and ...
Ballantine D. S.   +4 more
core   +3 more sources

Suspended Sediments in Environmental Flows: Interpretation of Concentration Profiles Shapes

open access: yesHydrology, 2022
In environmental flows, field and laboratory measurements of suspended sediments show two kinds of concentration profiles. For coarse sediments, a near-bed upward convex profile is observed beneath the main upward concave profile.
Rafik Absi
doaj   +1 more source

MONITORING ACTIVITY OF THE CO2 EMISSION OBJECTS SYSTEM COMPONENTS IN FORMATION OF THE AIR MASS IN INDIVIDUAL CLOSED PREMISES

open access: yesЗбірник наукових праць: Серія: Галузеве машинобудування, будівництво, 2019
According to the developed methodology of the experiment and with the use of electronic devices for measuring the content of carbon dioxide (CO2 ) in the air and using a set of special laboratory tools, the following were studied on the example of a ...
Dmytro Storozhenko   +5 more
doaj   +1 more source

Thermal-electrical analogy and inertia for thermal performance of building envelops [PDF]

open access: yesMATEC Web of Conferences, 2020
For transient thermal performance of building envelops adequate parameters are needed to capture the time lag and decrement factor. It is surprising that, in the formal electrical analogy, "inertia" is not represented by same components in fluid ...
Absi Rafik   +2 more
doaj   +1 more source

Quartz as an Insulator [PDF]

open access: yesProceedings of the Physical Society of London, 1888
n ...
openaire   +2 more sources

The preservation of quartz grain surface textures following vehicle fire and their use in forensic enquiry [PDF]

open access: yes, 2008
During a terrorist trial, dispute arose as to whether the temperature produced in a car fire was sufficient to destroy quartz grain surface textures.
Bull, PA   +5 more
core   +1 more source

Polymorphism, superheating, and amorphization of silica upon shock wave loading and release [PDF]

open access: yes, 2003
We present a detailed and quantitative examination of the thermodynamics and phase change mechanisms (including amorphization) that occur upon shock wave loading and unloading of silica.
Ahrens, Thomas J.   +2 more
core   +1 more source

Using multiple measures of teaching quality to strengthen teacher preparation

open access: yesEducation Policy Analysis Archives, 2020
We argue that teacher preparation programs considering approaches to assess teaching quality should choose measures that appropriately represent the complexity of teaching, have formative value in supporting teacher candidates develop as highly qualified
Jarod Kawasaki   +2 more
doaj   +1 more source

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