Results 51 to 60 of about 196,584 (354)

Multi-mode photonic crystal fibers for VCSEL based data transmission

, 2003
Quasi error-free 10 Gbit/s data transmission is demonstrated over a novel type of 50 micron core diameter photonic crystal fiber with as much as 100 m length.
A. Petersson, H. R. Simonsen, J. Broeng, Johnson, Lægsgaard, M. Stach, Michalzik, Michalzik, N. A. Mortensen, R. Michalzik, Russell   +10 more
core   +1 more source

Compact focusing grating couplers for silicon-on-insulator integrated circuits [PDF]

, 2007
—We report experimental results on compact and broadband focusing grating couplers, both in silicon-on-insulator (SOI) and gold on SOI. An eight-fold length reduction of the coupling structure from fiber to photonic wire in SOI, as com-pared to a linear ...
Dirk Taillaert, Dries Van Thourhout, Frederik Van Laere, Jonathan Schrauwen, Roel Baets, Stijn Scheerlinck, Student Member, Student Member, Student Member, Tom Claes, Wim Bogaerts   +10 more
core   +2 more sources

Multimodal Autonomic Biomarkers Predict Phenoconversion in Pure Autonomic Failure

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Pure autonomic failure (PAF) presents with autonomic failure without other neurological features. A third develop central neurological features, fulfilling criteria for multiple system atrophy (MSA) and Lewy body diseases (LBD), including Parkinson's disease and Dementia with Lewy bodies.
S. Koay, E. Vichayanrat, F. Bremner, F. Valerio, R. Mackenzie, G. Chiaro, G. Ingle, P. McNamara, L. Watson, J. N. Panicker, M. P. Lunn, C. Mathias, V. Iodice   +12 more
wiley   +1 more source

The rs10191329 Risk Allele Is Associated With Pronounced Retinal Layer Atrophy in Multiple Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To investigate whether the rs10191329 risk allele in the DYSF–ZNF638 locus, which is implicated in central nervous system resilience rather than immune‐mediated pathology, is associated with retinal layer thinning, a biomarker of neuroaxonal damage in relapsing multiple sclerosis (RMS). Methods From a prospective observational study,
Gabriel Bsteh, Ruchi Tanavade, Nik Krajnc, Fabian Föttinger, Theresa König, Martin Krenn, Lukas Haider, Barbara Kornek, Fritz Leutmezer, Kerstin U. Ludwig, Stefan Macher, Tobias Monschein, Markus Ponleitner, Paulus Rommer, Christiane Schmied, Karin Zebenholzer, Tobias Zrzavy, Gudrun Zulehner, Franziska Di Pauli, Axel Schmidt, Harald Hegen, Berthold Pemp, Thomas Berger   +22 more
wiley   +1 more source

Coherent cavity networks with complete connectivity

, 2011
When cavity photons couple to an optical fiber with a continuum of modes, they usually leak out within a finite amount of time. However, if the fiber is about one meter long and linked to a mirror, photons bounce back and forth within the fiber on a much
Almut Beige, Elica Kyoseva, Giorda P, Leong Chuan Kwek, Stenholm S   +4 more
core   +1 more source

Longitudinal Study of Salivary Biomarkers in the Definition of Clinico‐Molecular Progression of Parkinson's Disease

Annals of Clinical and Translational Neurology, EarlyView.
Longitudinal changes in salivary biomarkers in Parkinson’s disease (PD) from early (T0) to 4‐year follow‐up (T1), quantified by ELISA: oligomeric and total α‐synuclein, total and phosphorylated tau, MAP1LC3B (autophagy), and TNFa (inflammation). Blue arrows indicate direction of change at T1 vs T0 (up = increase; down = decrease).
Maria Ilenia De Bartolo, Daniele Belvisi, Matteo Costanzo, Claudia Caturano, Francesco Emanuele Bellomi, Carolina Cutrona, Flavia Aiello, Giorgio Leodori, Massimo Marano, Romina Mancinelli, Antonella Conte, Giovanni Fabbrini, Alfredo Berardelli, Giorgio Vivacqua   +13 more
wiley   +1 more source

Field Strength Prediction in High-Speed Train Carriages Using a Multi-Neural Network Ensemble Model with Optimized Output Weights

Applied Sciences
Accurate path loss prediction within train carriages is crucial for deploying base stations along high-speed railway lines. The field strength at receiving points inside carriages is influenced by outdoor signal transmission, penetration through window ...
Zhou Fang, Hengkai Zhao, Yichen Feng, Yating Wu, Yanqiong Sun, Qi Yang, Guoxin Zheng   +6 more
doaj   +1 more source

A Novel Trench-Assisted Optical Fiber With Ultra-Low Microbending Loss for the Full Ocean Depth Communication

IEEE Photonics Journal, 2023
A novel trench-assisted optical fiber with ultra-low microbending loss is proposed, which contains two trenches beside the core. The deformation distribution of the fiber axis caused by the wire mesh is in agreement with a Gaussian curve through the ...
Ruipu Li, Chuanlu Deng, Yi Huang, Zhenyi Chen, Xiaobei Zhang, Tingyun Wang   +5 more
doaj   +1 more source

Fiber-Optic Chemical Sensors and Fiber-Optic Bio-Sensors [PDF]

Sensors, 2015
This review summarizes principles and current stage of development of fiber-optic chemical sensors (FOCS) and biosensors (FOBS). Fiber optic sensor (FOS) systems use the ability of optical fibers (OF) to guide the light in the spectral range from ultraviolet (UV) (180 nm) up to middle infrared (IR) (10 μm) and modulation of guided light by the ...
Marie Pospíšilová, Gabriela Kuncová, Josef Trögl   +2 more
openaire   +5 more sources

Purkinje Cell Loss in Essential Tremor: Collective Data From 215 Brains Over a 21‐Year Period

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Essential tremor is a highly prevalent movement disorder. Pathological changes observed in essential tremor cerebella center around Purkinje cells and neighboring neuronal populations. Postmortem studies have variably, but not always, shown reduced Purkinje cell counts in essential tremor compared to controls.
Chloë A. Kerridge, Roberto S. Hernandez, Nora C. Hernandez, Phyllis L. Faust, Elan D. Louis   +4 more
wiley   +1 more source