Results 71 to 80 of about 102,841 (275)

Energetic Offset in Organic Solar Cells‐ Importance, Confusion and Outlook

open access: yesAdvanced Materials, EarlyView.
Energetic offsets in organic solar cells (OSCs) remain a subject of debate due to measurement‐ and lab‐dependent discrepancies. This Perspective clarifies the physical origins of these variations and identifies temperature‐dependent electro‐optical methods as a reliable approach to obtain consistent offset values.
Nakul Jain   +5 more
wiley   +1 more source

Large‐Area 2D Metasurface‐Based Triboelectric E‐Skin Arrays: Contact & Proximity Tactile Mapping with Broadband Acoustic Readouts

open access: yesAdvanced Materials, EarlyView.
Metasurface‐engineered NC‐TENG arrays integrate tactile pressure mapping, non‐contact gesture sensing, and acoustic signal readouts in one ultrathin module, and outperforms pristine PDMS in terms of electrical output and real‐time spatial mapping for next‐gen wearables.
Injamamul Arief   +12 more
wiley   +1 more source

Actuation of Cell Layers in Three Dimensions

open access: yesAdvanced Materials, EarlyView.
ABSTRACT The alignment of fibers and cells in living tissues affect their mechanical properties and functionality. In this context, one can draw an analogy between tissues and nematic liquid crystal elastomers. We explore this analogy by growing fibroblasts on 2D‐patterned substrates and observing the contraction of cell sheets upon detachment from the
Kirsten Endresen   +6 more
wiley   +1 more source

The Food of the Rook [PDF]

open access: yesNature, 1918
Is there not even a fallacy in the argument against this bird which is supported by a note in NATURE of June 6, p. 271? You say that because 52 per cent. of the rook's food is injurious, 19.5 per cent. neutral, and 28.5 per cent. beneficial, therefore “it is impossible to ignore the fact that at present this bird does considerably more harm than good,”
openaire   +3 more sources

Redundant RF system for space application [PDF]

open access: yes, 1979
An S-band radio frequency subsystem is described including two transmitters, two receivers and two antennas. The subsystem is capable of connecting either transmitter or receiver to either antenna while permitting simultaneous operation of a transmitter ...
Rook, C. W.
core   +1 more source

Unlocking the Potential of MXene‐Based Electrochemical Biosensors: A Review of Biofunctionalization Strategies and Biosensing Principles

open access: yesAdvanced Materials Technologies, EarlyView.
ABSTRACT Electrochemical biosensors enable the accurate and timely detection of clinical biomarkers, improving healthcare and precision medicine. MXene nanosheets, a class of 2D transition metal carbides, nitrides, and carbonitrides, are promising materials for developing next‐generation electrochemical biosensors due to their unique physicochemical ...
Muhsin Ali   +4 more
wiley   +1 more source

Rook placements and Jordan forms of upper-triangular nilpotent matrices [PDF]

open access: yes, 2017
The set of n by n upper-triangular nilpotent matrices with entries in a finite field F_q has Jordan canonical forms indexed by partitions lambda of n.
Yip, Martha
core   +2 more sources

Dual rook polynomials

open access: yesDiscrete Mathematics, 1997
The classical rook polynomial \(P_{\mathfrak B}(x)\) of a board \(\mathfrak B\) (which can be considered as a finite subset of cells of an infinite chessboard) is \(P_{\mathfrak B}(x)=\sum _{k\geq0} ^{}R_k(\mathfrak B)x^k\), where \(R_k(\mathfrak B)\) is the number of ways to place \(k\) nonattacking rooks on the board \(\mathfrak B\).
openaire   +3 more sources

Multi‐Dielectric Metasurfaces for Ultrabright, Tunable Structural Color and Reconfigurable Optical Filtering with Extraordinarily Large Color Span

open access: yesAdvanced Optical Materials, EarlyView.
Structural color generation is an emerging field for digital display and printing applications. This report presents a novel truncated‐cone design and the first use of GaP sandwiched between two layers of TiO2, demonstrating ultra‐bright, tunable colors with a record color gamut.
Md Rumon Miah   +2 more
wiley   +1 more source

A Healthcare Crisis, a Nursing Crisis, a Time to Breathe!

open access: yesNursing Praxis in Aotearoa New Zealand, 2017
Over the past few months I have spent time talking with clinical nurses, both in New Zealand and overseas. These conversations always lead to the same place; nurses feel they are being asked to do more with less, to tick boxes, they feel tired of ...
Helen Rook
doaj   +1 more source

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