Results 11 to 20 of about 4,714,518 (295)
Exact Optics: A unification of optical telescope design [PDF]
, 2002 A perfect focus telescope is one in which all rays parallel to the axis meet at a point and give equal magnification there. It is shown that these two conditions define the shapes of both primary and secondary mirrors.
Abbe +27 more
core +3 more sources
Center problem for a class of degenerate quartic systems
Electronic Journal of Qualitative Theory of Differential Equations, 2015 This paper, using pseudo-division algorithm, introduces a method for computing resonant focus numbers of a class of complex polynomial differential systems, establishes the necessary and sufficient conditions for existence of a center for a class of ...
Bo Sang
doaj +1 more source
Buildings, 2021 The starting point of this article is the critique on socioeconomic and environmental implications of conventional construction practices around sustainability.
Christina Priavolou +3 more
doaj +1 more source
Point-focus spectral splitting solar concentrator for multiple cells concentrating photovoltaic system [PDF]
Journal of Optics, 2015 13 pages, 7 ...
Maragliano Carlo +2 more
openaire +3 more sources
Complexity of frustration: A new source of non-local non-stabilizerness
SciPost Physics, 2023 We advance the characterization of complexity in quantum many-body systems by examining $W$-states embedded in a spin chain. Such states show an amount of non-stabilizerness or "magic", measured as the Stabilizer Rényi Entropy, that grows logarithmically
Jovan Odavić, Tobias Haug, Gianpaolo Torre, Alioscia Hamma, Fabio Franchini, Salvatore Marco Giampaolo
doaj +1 more source
Formal executable descriptions of biological systems [PDF]
, 2005 The similarities between systems of living entities and systems of concurrent processes may support biological experiments in silico. Process calculi offer a formal framework to describe biological systems, as well as to analyse their behaviour, both ...
Brodo, Linda +5 more
core +2 more sources
On a fixed point theorem for operator systems and eigenvalue criteria for existence of positive solutions [PDF]
Opuscula MathematicaWe provide an alternative approach, based on the Leray-Schauder fixed point index in cones, to a fixed point theorem for operator systems due to Precup. Our focus is on the case of operators whose components are entirely of compressive type. The abstract
Laura M. Fernández-Pardo +1 more
doaj +1 more source
Complexity of increasing knowledge flows: the 2022 Southwest Airlines Scheduling Crisis
Environmental Research: Infrastructure and Sustainability, 2023 The 2022 Southwest Airlines Scheduling Crisis, resulting in approximately 15 000 flight cancellations, demonstrates the challenges of structuring infrastructure systems and their knowledge-making processes for increasingly disruptive conditions.
Alysha Helmrich +2 more
doaj +1 more source
Theoretical and experimental investigation of a novel point‐focus Fresnel collector system with a novel receiver [PDF]
IET Renewable Power Generation, 2021 Abstract Here, experimental results for testing a novel solar concentrating system are presented. The novel receiver is tested on a technology that combines the two proven concepts of solar concentrating technologies (linear Fresnel reflector (LFR) and central receiver technologies) into a new concept called focal point Fresnel ...
Abdelrahman El‐Leathy +5 more
openaire +2 more sources
Spiking Neuron Mathematical Models: A Compact Overview
Bioengineering, 2023 The features of the main models of spiking neurons are discussed in this review. We focus on the dynamical behaviors of five paradigmatic spiking neuron models and present recent literature studies on the topic, classifying the contributions based on the
Luigi Fortuna, Arturo Buscarino
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