Results 161 to 170 of about 1,101,819 (306)
Laser &Photonics Reviews, EarlyView.A compact and low insertion loss programmable photonic circuit is demonstrated based on a 7‐cell hexagonal waveguide mesh with a large free spectral range (FSR) of 31 GHz for a 6‐gate ring resonator configuration. Vernier rings and a dual‐injected ring configuration are demonstrated on this circuit with a further improved FSR of 93 GHz.
Yu Zhang +6 more
wiley +1 more source
Frozen Differential Scattering in Reconfigurable Complex Media
Laser &Photonics Reviews, EarlyView.A localized perturbation universally results in a rank‐one update of the scattering matrix of any complex medium. The resulting differential output wavefront is “frozen”: its spatial pattern is fixed (agnostic to the input wavefront). Experiments with a programmable‐metasurface‐parametrized wireless link validate frozen differential scattering and ...
Philipp del Hougne
wiley +1 more source
No Partner, No Children? Union Formation, Assortative Mating, and Educational Inequalities in Fertility in Germany. [PDF]
Eur J PopulLeesch J, Hiekel N.
europepmc +1 more source
Mathematical Methods in the Applied Sciences, EarlyView.We develop a full randomization of the classical hyper‐logistic growth model by obtaining closed‐form expressions for relevant quantities of interest, such as the first probability density function of its solution, the time until a given fixed population is reached, and the population at the inflection point.
Juan Carlos Cortés +2 more
wiley +1 more source
Rheumatology specialist care in Europe: workforce trends and regional variations from a UEMS survey (European Union of medical specialists). [PDF]
Front Med (Lausanne)Rath E +3 more
europepmc +1 more source
Les déterminants des migrations dans l’espace européen : une prime aux effets de réseaux. [PDF]
Flux migratoires; Marchés du travail; Réseaux; Migrations internationales; Union européenne;
Mouhoud, El Mouhoub, Oudinet, Joël
core
International Journal of Mechanical System Dynamics, EarlyView.ABSTRACT Digitalization and emerging technologies are increasing the demand for wireless sensing and the Internet of Things (IoT), which provide opportunities for autonomous sources of electricity in the form of energy harvesting systems. This paper focuses on the challenges in hybrid piezoelectric‐electromagnetic kinetic energy harvesting systems that
Petr Sosna, Damian Gaska, Zdeněk Hadaš
wiley +1 more source
People and Nature, EarlyView.Abstract Amid increasing urbanisation and biodiversity decline, ‘effective stewardship’ of urban green space (UGS) is a complex but critical nature‐based solution for long‐term environmental, social and economic gain. Combining stewardship and sense‐of‐place frameworks with European nature‐based solutions guidance, we investigate which social and ...
Fay Kahane +2 more
wiley +1 more source
Putting Theory into Practice by Developing a Novel Digital Health Technology-Derived Endpoint in Sleep Quality. [PDF]
Digit BiomarkKramer F +7 more
europepmc +1 more source
People and Nature, EarlyView.Abstract Volunteers have been involved in nature observations for decades through citizen science initiatives, providing large data sets as well as problem identification that allow a more complete understanding of many natural phenomena. Although communication is a core component in citizen science, the key factors that determine its effectiveness in ...
Kristiina Gibson +18 more
wiley +1 more source