Results 181 to 190 of about 178,240 (316)

Carbon Dots: An Emerging Frontier for Green and Sustainable Civil Engineering Materials

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Traditional civil engineering materials (CE materials) are usually involved with high‐energy consumption during manufacturing, significant maintenance costs, and substantial environmental impacts throughout their life cycles. The progress of nanotechnology is catalyzing a green and sustainable transformation within the field.
Weiwen Hao, Xiaolong Wang, Xiao Chen, Dong Liu, Zhenhui Kang, Cheng Zhu   +5 more
wiley   +1 more source

Generalized Amit-Roginsky model from perturbations of 3D quantum gravity

Physical Review D
A generalized Amit-Roginsky vector model in flat space is obtained as the effective dynamics of pertubations around a classical solution of the Boulatov group field theory for 3D Euclidean quantum gravity, extended to include additional matter degrees of freedom.
Victor Nador, Daniele Oriti, Xiankai Pang, Adrian Tanasa, Yi-Li Wang   +4 more
openaire   +3 more sources

Nanofiber PVA‐Based Membranes Incorporating Functionalized Spanish Broom Derivatives for Sustainable Water Purification

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This study investigates Spanish broom (Spartium junceum) as a renewable source for electrospun composite membranes in sustainable water purification. MCC and biochar were functionalized with eco‐friendly precursors and nanomaterials (i.e., HNT, β‐CDs) to develop hybrid PVA nanofiber composites.
Giulia Rando, Silvia Sfameni, Jozefien Geltmeyer, Alessandra Palella, Lorenzo Spadaro, Alberto Riminucci, Karen De Clerck, Maria Rosaria Plutino   +7 more
wiley   +1 more source

Flexible Direct‐Conversion X‐Ray Detectors: From Emerging Materials to Conformal Imaging

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This comprehensive review analyzed the performance, challenges, and future directions of four emerging material systems for next‐generation flexible direct‐conversion X‐ray detectors: organic semiconductors, perovskites, metal–organic frameworks, and inorganic metal compounds.
Haipeng Di, Guoliang Ma, Jiaxin Mu, Kailian Dong, Haibin Li, Manjing Wang, Xin Song, Haojin Li, Jianwei Xu, Yiying Zhao, Jingjing Zhao, Guojia Fang   +11 more
wiley   +1 more source

Strict renormalizability as a paradigm for fundamental physics

Journal of High Energy Physics
An important theoretical achievement of the last century was the realization that strict renormalizability can be a powerful criterion to select Lagrangians in the framework of perturbative quantum field theory.
Luca Buoninfante
doaj   +1 more source

Synthesis, Crystal Structure, and Optoelectronic Properties of [(n‐/tert‐C4H9)S(CH3)2]PbI3

European Journal of Inorganic Chemistry, EarlyView.
Reaction of two isomers of butyldimethylsulfonium cation with PbI2 using solid‐state and solution methods yielded the corresponding organic/inorganic hybrid compounds with high humidity tolerance and 1D crystal structures of [n‐C4H9S(CH3)2]PbI3 and [tert‐C4H9S(CH3)2]PbI3.
Ioannis Koutsoumpogeras, Nikolaos Tsoureas, Nagia S. Tagiara, Ioannis Koutselas, Andreas Kaltzoglou   +4 more
wiley   +1 more source

Bounding field excursions along null geodesics with applications to cosmology

Journal of High Energy Physics
Scalar fields in theories of gravity often inhabit a moduli space of vacua, and coherent spatial or temporal variations in their expectation values can produce measurable gravitational effects.
Aidan Herderschee, Aron C. Wall
doaj   +1 more source

Dynamics in canonical models of loop quantum gravity

, 2019
In this thesis we consider the problem of dynamics in canonical loop quantum gravity, primarily in the context of deparametrized models, in which a scalar field is taken as a physical time variable for the dynamics of the gravitational field. The dynamics of the quantum states of the gravitational field is then generated directly by a physical ...
openaire   +2 more sources

Comparative Assessment and Benchmarking of Metaheuristic Algorithms for Dynamic Photovoltaic Array Reconfiguration Under Diverse Shading Environments

Energy Science &Engineering, EarlyView.
ABSTRACT The solar photovoltaic (PV) installations, which are essential for renewable energy systems, are vulnerable to partial shading, resulting in considerable power losses and operational inefficiencies. The dynamic reconfiguration of PV arrays has become an effective strategy to mitigate these effects by adaptively modifying the array topology to ...
Manoharan Premkumar, Ravichandran Sowmya, Jagarapu S. V. Siva Kumar, Mustafa Abdullah   +3 more
wiley   +1 more source

The recipe for the degrees of freedom.

Journal of High Energy Physics
We consider the question of counting the degrees of freedom in theoretical models, with an emphasis on theories of fields and gravity. Among the possible approaches, the Hamiltonian formulation remains one of the most systematic and robust tools. However,
Anamaria Hell, Elisa G. M. Ferreira, Dieter Lüst, Misao Sasaki   +3 more
doaj   +1 more source