Results 81 to 90 of about 1,806 (250)

Minkowski Island and Crossbar Fractal Microstrip Antennas for Broadband Applications

Applied Sciences, 2018
The paper presents microstrip patch antennas, which are based on the fractal antenna concept, and use planar periodic geometries, providing improved characteristics.
Roman Kubacki, Mirosław Czyżewski, Dariusz Laskowski   +2 more
doaj   +1 more source

Looking at Soil as It Is: Evolution of Microscopic Soil Characterization From Kubiëna to Artificial Intelligence

Journal of Plant Nutrition and Soil Science, EarlyView.
We provide a historic overview of microscopic soil structure characterization from its founding father, Walter Kubiëna, to several technical revolutions like automation, digitalization, and artificial intelligence. In addition to technical advancements, we explore how concepts and research questions have evolved in time.
Steffen Schlüter, Maik Geers‐Lucas, Peter Kühn, Hans‐Jörg Vogel   +3 more
wiley   +1 more source

Combining the Underwater Vision Profiler 6 with sediment traps to measure in situ velocity of marine particles

Limnology and Oceanography: Methods, EarlyView.
Abstract Particles sinking from the surface to the deep ocean play a key role in the biological carbon pump, whose efficiency depends partly on sinking velocities. Over the last decade, in situ imaging has enabled critical advances in our understanding of particle dynamics in the ocean.
Manon Laget, Alexandre Accardo, Marc Picheral, Camille Catalano, Lionel Guidi, Tristan Biard   +5 more
wiley   +1 more source

Performance optimization of crossed bowties of inverted Sierpinski fractal antenna for multiband wireless communication applications

Telematics and Informatics Reports
In recent years, substantial research efforts have focused on Sierpinski fractal antennas, both in their conventional form and through hybridizations with other antenna types, as well as various modifications. However, an unexplored area of investigation
Abdelbasset Azzouz, Rachid Bouhmidi, Mohammed Chetioui, Redouane Berber, Ahmed J.A. Al-Gburi   +4 more
doaj   +1 more source

A Three Valued Morse-Thue Fractal Tapering for Thinning of Fractal Array Antennas

, 2016
Fractal array antennas are multiband and broadband array antennas having space filling capability. But large Side lobe levels and the huge number of elements are the prominent challenges in the designing of these arrays. In this paper, analysis of linear
V.A.Sankar Ponnapalli, Jayasree, P.V.Y., P.V.Y. Jayasree, Ponnapalli, V.A.Sankar   +3 more
core   +1 more source

On the Assembly of Actin Polymerization‐Powered Motors

Macromolecular Rapid Communications, EarlyView.
Actin polymerization‐powered motors have the highest speed when the actin recruiting‐polymerizing proteins are immobilized in polymer brushes on their surface. These motors orbit around larger tracer particles at pH above the isoelectric point of ActA but dock onto the tracer particles’ surface at lower pH. ABSTRACT Nano‐ and micromotors are a class of
Miguel A. Ramos Docampo, Cathrine Abild Meyer, Brigitte Städler   +2 more
wiley   +1 more source

Antenna systems based on chiral metamaterials with fractal radiator geometry for radio communication systems

Физика волновых процессов и радиотехнические системы
Background. In wireless mobile communications, there are often situations when several radio transmitting devices operate on a single antenna system in several frequency bands, and therefore there is a need to create efficient multi-frequency antenna ...
Dmitriy S. Klyuev, Anatoly M. Neshcheret, Igor N. Pestovskiy, Konstantin I. Pestovskiy, Alexander A. Potapov, Yuliya V. Sokolova   +5 more
doaj   +1 more source

Polylactide/Graphene Nanoplatelet Composites for Advanced Functional Applications

Polymer Composites, EarlyView.
Polylactide/Graphene nanoplatelet composites for advanced functional applications. ABSTRACT This study investigates the structure–property relationships of polylactide (PLA) nanocomposites containing graphene nanoplatelets (GNP) and trimellitic anhydride‐modified GNPs (TMA‐GNP).
Shivanthi Dharmarathna, Haritha Haridas, Hadi Hosseini, Mehdi Babazadeh, Carlos E. Saavedra, Marianna Kontopoulou   +5 more
wiley   +1 more source

Impact of a purina fractal array geometry on beamforming performance and complexity

, 2013
This paper investigates the possible benefits of using a Purina fractal array for beamforming, since this particular fractal has recently been suggested as the flight formation for a fractionated space craft.
Weiss, Stephan, Bowman, Jamie, Punzo, Giuliano, Macdonald, Malcolm, Karagiannakis, Philippos, Stewart, Robert, Bowman, J.   +6 more
core  

On the compatibility of single‐scan terrestrial LiDAR with digital photogrammetry and field inventory metrics of vegetation structure in forest and agroforestry landscapes

Remote Sensing in Ecology and Conservation, EarlyView.
The single‐scan approach to terrestrial laser scanning (TLS) and the self‐terrain‐normalized form of drone‐based digital aerial photogrammetry (DAP) offer practical options for rapid assessment of the vegetation structure in tropical landscapes.
Magnus Onyiriagwu, Nereoh Leley, Caleb W. T. Ngaba, Anthony Macharia, Henry Muchiri, Abdalla Kisiwa, Martin Ehbrecht, Delphine Clara Zemp   +7 more
wiley   +1 more source