Results 61 to 70 of about 9,068 (292)

Photoactivation of NV Centers in Diamond via Continuous Wave Laser Illumination of Shallow As‐Implanted Nitrogen

open access: yesAdvanced Functional Materials, EarlyView.
This study demonstrates an alternative method of creating charge‐stable negatively charged nitrogen vacancy (NV−) centers close to the diamond surface without high‐temperature annealing. By illuminating nitrogen‐implanted regions with a continuous‐wave 405 nm laser, NV− centers are induced, exhibiting electron spin coherence properties suitable for ...
Jens Fuhrmann   +4 more
wiley   +1 more source

Modeling Measurement Uncertainty in Room Acoustics

open access: yesActa Polytechnica, 2007
This paper investigates a way of determining and modeling uncertainty contributions in measurements of room acoustic parameters, which are commonly used to describe the acoustic situation of a room in an objective manner.
P. Dietrich
doaj  

High Thermoelectric Performance in Low‐Cost Cu8SiSxSe6‐x Argyrodite

open access: yesAdvanced Functional Materials, EarlyView.
This study discovers the great potential of Cu8SiSxSe6‐x argyrodites as new, low‐cost, Te‐free thermoelectric materials. The proposed defect scheme suppresses the phase transition, enhances the weighted mobility and optimizes the grain boundary contacts.
Taras Parashchuk   +7 more
wiley   +1 more source

Acoustical measurements in rooms with variable acoustics. [PDF]

open access: yesThe Journal of the Acoustical Society of America, 1991
A dedicated, computer-based system was developed to perform a complete set of acoustical measurements of recent interest in full-sized rooms and in scale models of rooms. The measurements included reverberation time, early reverberation time, loudness, early-to-late temporal energy ratios, lateral energy fractions, interaural cross correlation, and ...
Wei‐hwa Chiang   +5 more
openaire   +2 more sources

Omnidirectional Transmissive Acoustic Metasurfaces Based on Goldberg Polyhedra

open access: yesAdvanced Functional Materials, EarlyView.
This study introduces omnidirectional acoustic metasurfaces capable of manipulating wavefronts in multiple arbitrary directions simultaneously. A full‐stack pipeline for design, optimization, and fabrication is presented to construct near‐spherical holograms based on Goldberg polyhedra.
Andrea Achilleos   +3 more
wiley   +1 more source

Optimization of Architectural Electroacoustics Design for the Interior Mezzanines of Vertical Buildings

open access: yesInternational Journal of Technology, 2018
A science that deals with the transformation of electrical energy into acoustic energy or vice versa, electroacoustic, generates the increased intensity and loudness of sound by mechanical and/or electrical means.
FX Teddy Badai Samodra
doaj   +1 more source

TLR Agonist Nano Immune Therapy Clears Peritoneal and Systemic Ovarian Cancer

open access: yesAdvanced Healthcare Materials, Volume 14, Issue 7, March 14, 2025.
Intraperitoneal administration of immunogenic Toll‐like receptor agonist‐modified mesoporous silica nanoparticles leads to rapid internalization by ascites myeloid cells with trafficking to fat‐associated lymphoid clusters. Activation of myeloid cells counters suppressive immune mechanisms associated with peritoneal metastasis, leading to regional and ...
Ben Marwedel   +15 more
wiley   +1 more source

Tattoo Assisted Optical Sensor System for Multimodal Discrete Physiological Sensing

open access: yesAdvanced Healthcare Materials, EarlyView.
Conventional temporary tattoos can be used for improving the speckle imaging signal‐to‐noise ratio and stability of the specifically developed device for capturing skin motion related to physiological activities beneath the skin. This allows for sensing multimodal electrophysiological signals and physiological events from the skin consistent with ...
Zihuan Wu   +5 more
wiley   +1 more source

Room acoustics and listening [PDF]

open access: yesThe Journal of the Acoustical Society of America, 1983
The physical basis for sound propagation in rooms may be described by a time-domain model of reflection from the walls. Reflections arriving soon after direct source-to-listener transmission produce a perception of spectral “coloration” while later arrivals contribute “echo.” Directional perception and listener preference for rooms are heavily ...
openaire   +2 more sources

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