Results 91 to 100 of about 41,910 (308)

Dynamic Control of Synaptic Plasticity by Competing Ferroelectric and Trap‐Assisted Switching in IGZO Transistors with Al2O3/HfO2 Dielectrics

Advanced Functional Materials, EarlyView.
A frequency‐tunable ferroelectric synaptic transistor based on a buried‐gate InGaZnO channel and Al2O3/HfO2 dielectric stack exhibits linear and reversible weight updates using single‐polarity pulses. By switching between ferroelectric and trap‐assisted modes depending on input frequency, the device simplifies neuromorphic circuit design and achieves ...
Ojun Kwon, Dong Ho Lee, Seyoung Oh, Jongwon Yoon, Hyo‐Bae Kim, Ji‐Hoon Ahn, Woojin Park, Han Seul Kim, Byungjin Cho   +8 more
wiley   +1 more source

The Effects of Ageing on Visual Spatiotemporal Processing [PDF]

i-Perception, 2014
In a previous study, we showed that visual spatiotemporal processing deteriorates with healthy ageing (Roinishvili et al, 2011, Vision Research, 51(4):417-23). Here, we used backward masking to investigate the underlying mechanisms.
M Kunchulia, K.S Pilz, K Parkosadze, M.H Herzog   +3 more
doaj   +1 more source

A method for the visualization of high phase gradients in a microscopic image [PDF]

, 2008
Holografická mikroskopie je nekonvenční mikroskopická technika, vhodná zvláště pro vzorky s malou optickou hustotou, která umožňuje zviditelnit index lomu pozorovaných objektů.
Druckmüllerová, Hana
core  

Miniature Nanomesh Mechano‐Acoustic Sensor with Wide Linear Dynamic Range, Broad Bandwidth, and Flat Frequency Response

Advanced Functional Materials, EarlyView.
A miniaturized mechano‐acoustic sensor is developed using an electrospun PVDF nanomesh as the diaphragm in a capacitive sensor structure. Unlike conventional nanomesh‐based sensors, it achieves high linear sensitivity, a broad and flat frequency response, and a compact form factor.
Jeng‐Hun Lee, Kang Hyuk Cho, Seojin Yun, Siyoung Lee, Woongji Kim, Yunsik Kim, Wonkyu Moon, Yoonyoung Chung, Kilwon Cho   +8 more
wiley   +1 more source

Frame Theory for Signal Processing in Psychoacoustics

, 2016
This review chapter aims to strengthen the link between frame theory and signal processing tasks in psychoacoustics. On the one side, the basic concepts of frame theory are presented and some proofs are provided to explain those concepts in some detail ...
A. Bregman, A. Janssen, A. Ron, A.V. Oppenheim, A.V. Oppenheim, B. Laback, B. Laback, B.C.J. Moore, B.C.J. Moore, B.R. Glasberg, C. Heil, C. Heil, C. Wiesmeyr, C.J. Plack, D. Soderquist, D. Wang, D.D. Greenwood, D.T. Stoeva, D.T. Stoeva, E. Hernández, E. Ravelli, E. Zwicker, E. Zwicker, E.A. Lopez-Poveda, G. Chardon, G. Kidd Jr, G. Matz, H. Bölcskei, H. Fastl, I. Daubechies, J. Kovačević, J. Leng, J.J. Benedetto, J.J. O’Donovan, J.S. Garofolo, K. Gröchenig, L. Chai, L.N. Trefethen, M. Bownik, M. Bézat, M. Elad, M. Unoki, M. Vetterli, N. Holighaus, N. Holighaus, N. Perraudin, N.K. Bari, O. Christensen, O. Christensen, O. Christensen, P. Balazs, P. Balazs, P. Balazs, P. Balazs, P. Balazs, P. Balazs, P. Balazs, P. Balazs, P. Casazza, P. Søndergaard, P. Vaidyanathan, P.G. Casazza, P.G. Casazza, R.D. Patterson, R.J. Duffin, R.M. Young, S. Strahl, T. Irino, T. Painter, T. Werther, T.S. Gunawan, W. Jesteadt, X. Valero, X. Zhao, Z. Cvetković   +74 more
core   +1 more source

Functional Materials for Environmental Energy Harvesting in Smart Agriculture via Triboelectric Nanogenerators

Advanced Functional Materials, EarlyView.
This review explores functional and responsive materials for triboelectric nanogenerators (TENGs) in sustainable smart agriculture. It examines how particulate contamination and dirt affect charge transfer and efficiency. Environmental challenges and strategies to enhance durability and responsiveness are outlined, including active functional layers ...
Rafael R. A. Silva, Giulio Fatti, Emanuel Carlos, Guilherme Ferreira, Sumita Goswami, Suman Nandy, Luiz H. C. Mattoso, Elvira Fortunato, Caio G. Otoni, Rodrigo Martins   +9 more
wiley   +1 more source

Time Domain Computation of a Nonlinear Nonlocal Cochlear Model with Applications to Multitone Interaction in Hearing

, 2002
A nonlinear nonlocal cochlear model of the transmission line type is studied in order to capture the multitone interactions and resulting tonal suppression effects.
Deng, Li, Qi, Yingyong, Xin, Jack
core   +1 more source

MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance

Advanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley   +1 more source

Ongoing Slow Fluctuations in V1 Impact on Visual Perception

Frontiers in Human Neuroscience, 2016
The human brain’s ongoing activity is characterized by intrinsic networks of coherent fluctuations, measured for example with correlated functional magnetic resonance imaging signals.
Afra Maria Wohlschläger, Afra Maria Wohlschläger, Afra Maria Wohlschläger, Sarah Glim, Sarah Glim, Sarah Glim, Junming Shao, Junming Shao, Junming Shao, Johanna Draheim, Johanna Draheim, Lina Köhler, Lina Köhler, Susana Lourenço, Susana Lourenço, Valentin Riedl, Valentin Riedl, Valentin Riedl, Christian Sorg, Christian Sorg, Christian Sorg   +20 more
doaj   +1 more source

Complex Cryptographic and User‐Centric Physically Unclonable Functions Enabled by Strain‐Sensitive Nanocrystals via Selective Ligand Exchange

Advanced Functional Materials, EarlyView.
This study investigates electromechanical PUFs that improve on traditional electric PUFs. The electron transport materials are coated randomly through selective ligand exchange. It produces multiple keys and a key with motion dependent on percolation and strain, and approaches almost ideal inter‐ and intra‐hamming distances.
Seungshin Lim, Hanseok Seo, Taesung Park, Byung Ku Jung, Junhyeok Park, Young Kyun Choi, Dae Yang Oh, Soong Ju Oh   +7 more
wiley   +1 more source