Results 31 to 40 of about 159,411 (262)

Leaky-Wave Antenna With Wide Scanning Range Based on Double-Layer Substrate Integrated Waveguide

IEEE Access, 2020
A leaky-wave antenna (LWA) based on the double-layer substrate integrated waveguide (SIW) that has a wide scanning range within a narrow bandwidth is proposed.
Peng Luo, Wang He, Yiming Zhang, Hui Liu, Erik Forsberg, Sailing He   +5 more
doaj   +1 more source

PARK(ing) time–How park deficiency affects the biological clock in a Drosophila model of Parkinson's disease

FEBS Letters, EarlyView.
Drosophila park mutants serve as a model for Parkinson's disease. We used this strain to investigate the connection between oxidative stress and the circadian clock mechanism. We showed that increased oxidative stress affects the physiology of pacemaker cells, disrupting their daily structural plasticity. Lack of rhythmic signaling from pacemaker cells
Kamila Zientara, Kinga Skoczek, Elzbieta Pyza, Milena Damulewicz   +3 more
wiley   +1 more source

Terahertz single/dual beam scanning with tunable field of view by cascaded metasurfaces

APL Photonics
Dynamic beam scanning with a dynamically tunable beam number, beam direction, and beam polarization remains a challenge in the terahertz gap, which is urgently needed for terahertz radar, next-generation wireless communication, and imaging applications ...
Haifeng Xu, Jierong Cheng, Shengnan Guan, Fan Li, Xianghui Wang, Shengjiang Chang   +5 more
doaj   +1 more source

Mechanical/Electrical Hybrid Two-Dimensional Beam Scanning Cylindrical Dielectric Lens Antenna Fed by a Phased Array Primary Radiator

IEEE Access
A hybrid two-dimensional (2D) beam-scanning lens antenna through the combination of a mechanical lens slide and a phased array primary radiator is proposed.
Yoshiki Sugimoto, Kunio Sakakibara, Tuan Hung Nguyen, Takanori Narita, Nobuyoshi Kikuma   +4 more
doaj   +1 more source

A high‐gain circular polarization beam scanning transmit array antenna

IET Microwaves, Antennas & Propagation, 2021
A high‐gain circular polarization (CP) beam scanning antenna based on planar transmit array (TA) is proposed. The planar TA is implemented using rectangular patches and square rings, and it has different frequency responses to two orthogonal polarized ...
Qingyun Zeng, Zhenghui Xue, Wu Ren, Weiming Li, Shiyi Yang   +4 more
doaj   +1 more source

Efficient Line Beam Scanning Based on a Hybrid Optical Phased Array Rendering Flexible Field-of-Views

IEEE Photonics Journal, 2023
Conventional OPAs incorporating a diffraction grating were mainly developed to achieve a two-dimensional spot beam-based scan, which inevitably requires a wide range of wavelength tuning, leading to unaffordable complexity and limited scanning speed.
Chenxi Wang, Eun-Su Lee, Jinung Jin, Bishal Bhandari, Ji-Yeong Gwon, Menglong Luo, Jin-Moo Heo, Seong-Hyeon Ju, Sung-Yong Ko, Jung-O Son, Min-Cheol Oh, Sang-Shin Lee   +11 more
doaj   +1 more source

Investigating transcription factor dynamics in health and disease using FRAP

FEBS Letters, EarlyView.
FRAP analysis of GFP‐tagged transcription factors reveals how molecular mobility and target engagement change in response to drug treatment. By combining live‐cell imaging, quantitative model fitting, and statistical analysis, this approach uncovers transcription factor dynamics linked to disease mechanisms, providing a powerful framework for ...
Kannan Govindaraj, Carolina Vazquez Garzon, Jose Joaquin Velasco, Janine N. Post   +3 more
wiley   +1 more source

Raman‐based label‐free microscopic analysis of the pancreas in living zebrafish larvae

FEBS Open Bio, EarlyView.
Forward stimulated Raman scattering (F‐SRS) and epi coherent anti‐Stokes Raman scattering (E‐CARS) allow label‐free discrimination of distinct subcellular structures in the pancreas of living zebrafish larvae. Given the straightforward applicability, we anticipate broad implementation of Raman microscopy in other organs and across various biomedical ...
Noura Faraj, Eline M. F. de Lange, Klaas A. Sjollema, Ben N. G. Giepmans   +3 more
wiley   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

FEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Scanning behavior in echolocating common pipistrelle bats (Pipistrellus pipistrellus). [PDF]

PLoS ONE, 2013
Echolocating bats construct an auditory world sequentially by analyzing successive pulse-echo pairs. Many other mammals rely upon a visual world, acquired by sequential foveal fixations connected by visual gaze saccades.
Anna-Maria Seibert, Jens C Koblitz, Annette Denzinger, Hans-Ulrich Schnitzler   +3 more
doaj   +1 more source