Results 111 to 120 of about 285,497 (312)

Cilia oscillations

Philosophical Transactions of the Royal Society B: Biological Sciences, 2019
Cilia, or eukaryotic flagella, are microscopic active filaments expressed on the surface of many eukaryotic cells, from single-celled protozoa to mammalian epithelial surfaces. Cilia are characterized by a highly conserved and intricate internal structure in which molecular motors exert forces on microtubule doublets causing cilia oscillations.
Yi Man, Feng Ling, Eva Kanso
openaire   +3 more sources

Light Switchable Ionic Conductivity of Arylazopyrazole Modified Polysiloxanes

Advanced Materials Technologies, EarlyView.
We present a polysiloxane functionalized with a novel arylazopyrazole dye that undergoes reversible photoisomerization. Upon lithium bis(trifluoromethanesulfonyl)imide addition and UV irradiation, the polymer exhibits a shift in tan(d) toward higher frequencies and enhanced ionic conductivity.
Malte S. Beccard, Thulasinath Raman Venkatesan, Michael Bauer, Valentin Razvan Lupu, Philipp Scheidegger, Francesco Taddei, Frank A. Nüesch, Dorina M. Opris   +7 more
wiley   +1 more source

Global Navigation Satellite Systems disciplined oscillator synchronisation of multistatic radar

IET Radar, Sonar & Navigation
A fundamental challenge in the practical implementation of multistatic radar systems (MSRS) is the requirement for precise time and frequency synchronisation between the spatially separated radar nodes.
Piers J. Beasley, Nial Peters, Colin Horne, Matthew A. Ritchie   +3 more
doaj   +1 more source

Room Temperature to 300°C SiC MOSFET Oscillator Under Fixed Bias

IEEE Access
Wireless monitoring systems in high-temperature, harsh industrial environments, including oscillator circuits to interface with sensing and transmission components, must operate over temperature ranges of several hundred degrees Celsius.
Jude A. Zanoni, Nuri W. Emanetoglu, Mauricio Pereira da Cunha   +2 more
doaj   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

Channel Estimation and Data Detection in the Presence of Phase Noise in MIMO-OFDM Systems With Independent Oscillators

IEEE Access, 2017
In this paper, we propose the mitigating scheme to reduce the effects of phase noise in multi-input multi-output-orthogonal frequency division multiplexing system with independent oscillator in each RF chain.
Tae-Jun Lee, Young-Chai Ko
doaj   +1 more source

A Compact Incubation Platform for Long‐Term Cultivation of Biological Samples for Nitrogen‐Vacancy Center Widefield Microscopy

Advanced Materials Technologies, EarlyView.
A compact incubation platform enables long‐term cultivation of biological samples directly on diamond quantum sensors for NV widefield magnetometry. The 3D‐printed biocompatible chamber provides a temperature controlled, CO2${\rm CO}_2$ and humidity rich environment while accommodating total internal reflection excitation geometry.
Andre Pointner, Daniela Thalheim, Sarah Belasi, Lukas Heinen, Lucas R. Carnell, Christina Janko, Rainer Tietze, Christoph Alexiou, Regine Schneider‐Stock, Roland Nagy   +9 more
wiley   +1 more source

A Review of Interface Electronic Systems for AT-cut Quartz Crystal Microbalance Applications in Liquids

Sensors, 2008
From the first applications of AT-cut quartz crystals as sensors in solutionsmore than 20 years ago, the so-called quartz crystal microbalance (QCM) sensor isbecoming into a good alternative analytical method in a great deal of applications such ...
Antonio Arnau
doaj  

LO Generation Techniques for Millimeter-Wave Receivers

IEEE Open Journal of the Solid-State Circuits Society
Millimeter-wave radios hold promise for supporting high data rates in wireless communication. A key challenge in the development of these radios relates to the generation of the local oscillator (LO) waveform(s) necessary for upconversion and ...
Behzad Razavi
doaj   +1 more source

Improvement of the Barkhausen criterion and the implementation of an intelligent function generator

The Journal of Engineering, 2017
Function generators are vital tools for many industrial applications. Sinusoidal oscillators are the essential units of function generators and investigating their performance is therefore necessary.
Chia-Wei Lin, Yen-Ting Chen, Ying-Chen Chen, Chung-Cheng Chen   +3 more
doaj   +1 more source