Results 81 to 90 of about 962,701 (301)
Smoking status and cognitive performance among vocational school students in Beijing，China
Tobacco Induced Diseases, 2018 Background Studies of differences in cognitive function between smokers and non-smokers have yielded inconsistent results. However, most of studies have focused on middle-aged and elderly adults.
Hu Pengjuan +3 more
doaj +1 more source
Enhancing the Efficiency of Polariton OLEDs in and Beyond the Single‐Excitation Subspace
Advanced Optical Materials, EarlyView.Organic light‐emitting diodes (OLEDs) are transforming lighting with eco‐friendly manufacturing and flexible applications. However, since 75 % of excited states (triplets) are non‐emissive, recent research has focused on triplet harvesting. This work proposes a predictive polariton‐based model, exploring conditions for OLED enhancement and showing that
Olli Siltanen +3 more
wiley +1 more source
Free W*-Dynamical Systems From p-Adic Number Fields and the Euler Totient Function
Mathematics, 2015 In this paper, we study relations between free probability on crossed product W * -algebras with a von Neumann algebra over p-adic number fields
Ilwoo Cho, Palle E. T. Jorgensen
doaj +1 more source
Inductive Formulas for some Arithmetic Functions [PDF]
arXiv, 2011 We prove recursive formulas involving sums of divisors and sums of triangular numbers and give a variety of identities relating arithmetic functions to divisor functions providing inductive identities for such arithmetic functions.
arxiv
Ambient‐Air‐Processed, Solution‐Based Organic Photovoltaics and Photodetectors
Advanced Optical Materials, EarlyView.This review explores ambient‐air‐processed, solution‐based organic photovoltaics (OPVs) and organic photodetectors (OPDs). It highlights advancements in photoactive materials, charge transport layers, and electrodes integrated into devices processed in ambient air via solution‐based methods, examining their performance, stability, and scalability, and ...
Bahareh Nasrollahi +3 more
wiley +1 more source
Arithmetic over trivially valued field and its applications [PDF]
arXiv, 2020 By some result on the study of arithemtic over trivially valued field, we find its applications to Arakelov geometry over adelic curves. We prove a partial result of the continuity of arithmetic $\chi$-volume along semiample divisors. Moreover, we give a upper bound estimate of arithmetic Hilbert-Samuel function.
arxiv
Advanced Photonics Research, EarlyView.A family of purinylidene based Ir(III) emitters, namely, f‐ct2a–d, are synthesized and utilized as both dopants and sensitizers in the construction of efficient purple to deep‐blue organic light‐emitting diode devices. It is very challenging to achieve highly efficient and low roll‐off purple to deep‐blue organic light‐emitting diodes (OLEDs) due to ...
Jie Yan +8 more
wiley +1 more source
Recruitment of the premotor cortex during arithmetic operations by the monkey
Scientific ReportsArithmetic operations are complex mental processes rooted in the abstract concept of numerosity. Despite the significance, the neural architecture responsible for these operations has remained largely uncharted. In this study, we explored the presence of
Sumito Okuyama +2 more
doaj +1 more source
Ramanujan-Fourier series of certain arithmetic functions of two variables [PDF]
Hardy-Ramanujan Journal (May 3, 2016) hrj:1453, 2016 We study Ramanujan-Fourier series of certain arithmetic functions of two variables. We generalize Delange's theorem to the case of arithmetic functions of two variables and give sufficient conditions for pointwise convergence of Ramanujan-Fourier series of arithmetic functions of two variables.
arxiv
Precision Construction of Chiral Optical Fields with Nine Controllable Degrees of Freedom
Advanced Photonics Research, EarlyView.Chiral optical fields (COFs) offer multiple controllable degrees of freedom (DOFs), enabling applications in optical tweezers, manufacturing, and encryption. However, achieving precise sidelobe control remains a challenge. This work introduces a modular multilayer annular phase plate to fine‐tune COFs by manipulating nine DOFs.
Duo Deng +4 more
wiley +1 more source