Results 61 to 70 of about 709,766 (319)

Optoelectronic Synaptic Devices Using Molecular Telluride Phase‐Change Inks for Three‐Factor Learning

open access: yesAdvanced Functional Materials, EarlyView.
Optoelectronic synaptic devices based on solution‐processed molecular telluride GST‐225 phase‐change inks are demonstrated for three‐factor learning. A global optical signal broadcast through a silicon waveguide induces non‐volatile conductance updates exclusively in locally electrically flagged memristors.
Kevin Portner   +14 more
wiley   +1 more source

Streaming Kernelization [PDF]

open access: yes, 2014
Kernelization is a formalization of preprocessing for combinatorially hard problems. We modify the standard definition for kernelization, which allows any polynomial-time algorithm for the preprocessing, by requiring instead that the preprocessing runs in a streaming setting and uses $\mathcal{O}(poly(k)\log|x|)$ bits of memory on instances $(x,k)$. We
Stefan Fafianie, Stefan Kratsch
openaire   +2 more sources

Receptor‐Free Identification of Toxic Gases Enabled by Hygroscopic Aqueous Salt Films

open access: yesAdvanced Functional Materials, EarlyView.
Water as a gas sensor coating sounds impossible—until it stops evaporating. Here, hygroscopic salt solutions (LiCl, LiBr, H3PO4) form non‐drying aqueous films on CNT chemiresistors under ambient air. Gases partition into these liquid layers, sometimes transforming into water, and generate salt‐specific resistance fingerprints across a four‐channel ...
Seongwoo Lee   +5 more
wiley   +1 more source

Stream corridor restoration : principles, processes, and practices.

open access: yes, 1998
"August 26, 1998"--Transmittal sheet."October 1998.""National engineering handbook (NEH), part 653"--Transmittal sheet.Shipping list no.: 99-0011-S.Cover title.Cooperative effort among fifteen Federal agencies and partners to produce a common reference ...
Federal Interagency Stream Restoration Working Group (U.S.)
core  

Design Strategies and Emerging Applications of High‐Performance Flexible Piezoresistive Pressure Sensors

open access: yesAdvanced Functional Materials, EarlyView.
Flexible piezoresistive pressure sensors underpin wearable and soft electronics. This review links sensing physics, including contact resistance modulation, quantum tunneling and percolation, to unified materials/structure design. We highlight composite and graded architectures, interfacial/porous engineering, and microstructured 3D conductive networks
Feng Luo   +2 more
wiley   +1 more source

Drying and Rainfall Shape the Structure and Functioning of Nitrifying Microbial Communities in Riverbed Sediments

open access: yesFrontiers in Microbiology, 2018
Non-flow periods in fluvial ecosystems are a global phenomenon. Streambed drying and rewetting by sporadic rainfalls could drive considerable changes in the microbial communities that govern stream nitrogen (N) availability at different temporal and ...
Maria Isabel Arce   +7 more
doaj   +1 more source

Session C1 - Stream Functions Pyramid Framework

open access: yes, 2012
Richard Starr is Chief of the Habitat Restoration Division within the U.S. Fish and Wildlife Service Chesapeake Bay Field Office, Annapolis, Maryland. He manages the Partners for Wildlife Program, Stream Habitat Assessment and Restoration Program, and ...
Starr, Richard
core  

A Non‐Reciprocal Architected Porous Medium

open access: yesAdvanced Functional Materials, EarlyView.
ABSTRACT In several fluid flow, energy‐dumping, and energy‐harvesting applications, a dominant flow direction or dominant resistance direction is desirable. In this study, we propose a simple modular geometry that doubles flow resistance in one direction relative to the opposite direction, while maintaining laminar viscous flow.
Clément Vezies   +2 more
wiley   +1 more source

Evaluation of the activity levels and the radiological hazards associated with the imported chemical and local organic fertilizers used in Ethiopia

open access: yesNuclear Engineering and Technology
In this study, the activity concentrations of 226Ra, 232Th, and 40K in fertilizer samples obtained from farmers and suppliers utilized in Ethiopia were measured using gamma-ray spectrometry with an HPGe detector.
Alelign Worku Gedefaw   +1 more
doaj   +1 more source

Distributed stream reasoning

open access: yes, 2012
Stream Reasoning is the combination of reasoning techniques with data streams. In this paper, we present our approach to enable rule-based reasoning on semantic data streams in a distributed ...
Martinez, Kirk   +2 more
core  

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