Results 91 to 100 of about 90,351 (306)
Advanced Science, EarlyView.A compact eight‐channel electrically tunable varifocal metalens with three single‐layer polarization‐multiplexed bi‐focal metalens and three LC cells. The total thickness of the device is ∼6 mm, while the focal lengths can be switched among eight values (3.6, 4.2, 4.5, 4.9, 6.2, 6.9, 8.4, and 9.6 mm). ABSTRACT As an essential module of optical systems,
Zhiyao Ma +11 more
wiley +1 more source
Advanced Science, EarlyView.A soft mechanoluminescent tactile sensor that converts force directly into light is presented, enabling imaging‐based, wiring‐free touch sensing. By integrating a flexible ML‐skin with CMOS readout, the system achieves high sensitivity, fast response, and high spatial resolution, while maintaining structural simplicity and energy efficiency, offering a
Yu Feng +11 more
wiley +1 more source
PRODUCTION AND SUPPLY CHAIN OF SAFE VEGETABLES IN HUONG TRA TOWN, THUA THIEN HUE PROVINCE
, 2019 : On the basis of descriptive statistical methods, the authors describe the supply chain of safe vegetables in Huong Tra Town. The primary data were collected from the survey of six households providing vegetable production in the region.
Phuoc Hai, Nhieu Khanh, Hoa, Phan Van
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Fluorescence Tuning of Carbon Dots from Red to Blue via UV‐Induced Photochemical Etching
Advanced Science, EarlyView.A UV‐driven photochemical process enables continuous color evolution of carbon dots from red to blue using a single irradiation parameter. Progressive photoetching restructures graphitic domains and surface states, allowing full visible‐spectrum emission control.
Nanzhi Zheng +6 more
wiley +1 more source
Advanced Science, EarlyView.A continuous conductivity gradient is formed in a porous MXene/melamine foam via directional evaporation, thereby improving impedance matching and enhancing electromagnetic attenuation. The resulting monolithic composite delivers absorption‐dominant EMI shielding with ultralow reflection, offering a simple route toward lightweight EMI shielding ...
Dawei Zhang +6 more
wiley +1 more source
Advanced Science, EarlyView.Precursor stoichiometry programs the surface chemistry of carbon dots, directing their self‐assembly into distinct aggregation modes. Aldehyde‐enriched surfaces form ordered, hydrogen‐bonded assemblies that enable bright red solid‐state fluorescence, whereas amine‐rich surfaces promote compact π–π stacked aggregates with broadband visible‐light ...
Gaixia Yang +8 more
wiley +1 more source
Robust Extraction of Moving Objects Based on Hue and Hue Gradient [PDF]
, 2007 This paper presents a new method for robustly extracting moving objects in an environment with varying illuminations. The proposed method applies background subtraction scheme based on hue and hue gradient to minimize the effect of the illumination change.
Yoo-Joo Choi, Je-Sung Lee, We-Duke Cho
openaire +1 more source
Exploring postnatal depression in Thua Thien Hue Province, Central Vietnam
, 2010 Introduction\ud \ud Postnatal depression (PND) is an important public health issue due to its impact on maternal wellbeing, infant development, and family cohesion.
Khawaja, Nigar G. +3 more
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TRIM: Simultaneous Thermometry, Ranging, and Imaging via a Monolithic Metalens
Advanced Science, EarlyView.ABSTRACT While metasurfaces offer a pathway beyond the discrete architectures of conventional LWIR systems, physically fusing high‐precision thermometry and passive ranging onto a single metalens remains a formidable challenge. Here, we demonstrate a monolithic, dual‐focus metalens capable of simultaneous multidimensional sensing.
Man Yuan +10 more
wiley +1 more source
Hue Contrast and the Sense of Space
i-Perception, 2015 Does human vision deploy a generic template for open landscapes that might fit the gist of current optical input? In an experiment, participants judged depth order in split-field images in which the two fuzzily delineated half-images were filled with different hues.
J. J. Koenderink +3 more
openaire +6 more sources