Results 51 to 60 of about 80,480 (279)

Effects of Length and Diameter of Open-Ended Coaxial Sensor on its Reflection Coefficient [PDF]

open access: yes, 2012
This paper presents a calibration technique for a coaxial sensor using a transmission signal approach. The sensor was fabricated from commercially available RG402/U and RG405/U semi-rigid coaxial cable.
Abbas, Z., Salleh, J., You, K. Y.
core   +1 more source

Calibration of the EDGES High-Band Receiver to Observe the Global 21-cm Signature from the Epoch of Reionization [PDF]

open access: yes, 2016
The EDGES High-Band experiment aims to detect the sky-average brightness temperature of the $21$-cm signal from the Epoch of Reionization (EoR) in the redshift range $14.8 \gtrsim z \gtrsim 6.5$.
Bowman, Judd D.   +3 more
core   +2 more sources

Pyramidal Structures on Yttria‐Stabilized Zirconia after High Temperature Exposure at 1500°C: New Features on an Old Material

open access: yesAdvanced Engineering Materials, EarlyView.
New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold   +2 more
wiley   +1 more source

Analysis of supported steel frames with rigid and semi-rigid connections

open access: yesGrađevinar, 2017
The use of a bracing system for controlling lateral displacement of frames, especially in case of semi-rigid connections, is analysed in the paper. The results indicate that various effects on the stiffness and ductility parameters of structures can be ...
Hossein Khosravi   +2 more
doaj   +1 more source

Biodegradable and Recyclable Luminescent Mixed‐Matrix‐Membranes, Hydrogels, and Cryogels based on Nanoscale Metal‐Organic Frameworks and Biopolymers

open access: yesAdvanced Functional Materials, EarlyView.
The study presents biodegradable and recyclable mixed‐matrix membranes (MMMs), hydrogels, and cryogels using luminescent nanoscale metal‐organic frameworks (nMOFs) and biopolymers. These bio‐nMOF‐MMMs combine europium‐based nMOFs as probes for the status of the materials with the biopolymers agar and gelatine and present alternatives to conventional ...
Moritz Maxeiner   +4 more
wiley   +1 more source

Technical Note: Semi-rigid chambers for methane gas flux measurements on tree stems [PDF]

open access: yesBiogeosciences, 2016
There is increasing interest in the measurement of methane (CH4) emissions from tree stems in a wide range of ecosystems so as to determine how they contribute to the total ecosystem flux. To date, tree CH4 fluxes are commonly measured using rigid closed
A. Siegenthaler   +4 more
doaj   +1 more source

Role of flexi-rigid thoracoscopy in undiagnosed pleural effusions and correlation of visual appearance of pleura on thoracoscopy with the final diagnosis

open access: yesJournal of Association of Pulmonologist of Tamil Nadu, 2021
Background: Undiagnosed pleural effusions (UPE) account for roughly 25% of cases of all pleural effusions. Minimally invasive flexi-rigid thoracoscopy has high diagnostic yield.
Pallavi Periwal   +2 more
doaj   +1 more source

The packing of granular polymer chains [PDF]

open access: yes, 2009
Rigid particles pack into structures, such as sand dunes on the beach, whose overall stability is determined by the average number of contacts between particles.
Donev   +11 more
core   +1 more source

An All‐Optical Driven Bio‐Photovoltaic Interface for Active Control of Live Cells

open access: yesAdvanced Functional Materials, EarlyView.
Bio‐photovoltaic Interface (BIO‐PV‐I) for live cell manipulation is presented. BIO‐PV‐I can be activated non‐invasively and remotely to control the spatial motility, adhesion, and morphology of cells adhering to it. BIO‐PV‐I uses a patterned light‐induced electric potential in iron‐doped lithium niobate crystals whose light‐driven and reversible nature,
Lisa Miccio   +8 more
wiley   +1 more source

Combined Joint and Member Damage Identification of Semi-Rigid Frames with Slender Beams Considering Shear Deformation

open access: yesBuildings, 2023
A damage identification methodology considering shear deformation was presented in this paper to identify damage to semi-rigid frames with slender beams.
Feng Xiao   +4 more
doaj   +1 more source

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