Results 71 to 80 of about 501,031 (301)

Reproducing single-carrier digital modulation schemes for VLC by controlling the first switching harmonic of the dc-dc power converter output voltage ripple [PDF]

, 2018
A DC-DC power converter based on a two-phase synchronous buck converter that reproduces single-carrier digital modulation schemes by controlling the first switching harmonic of the output voltage ripple is presented in this work.
Fernández Miaja, Pablo, González Lamar, Diego, Rodríguez Méndez, Juan, Sebastián Zúñiga, Francisco Javier   +3 more
core   +2 more sources

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Accurate control of a liquid-crystal display to produce a homogenized Fourier transform for holographic memories [PDF]

, 2007
We show an accurate procedure to obtain a Fourier transform (FT) with no dc term using a commercial twisted-nematic liquid-crystal display. We focus on the application to holographic storage of binary data pages, where a drastic decrease of the dc term ...
Alvarez, Mariela L., Beléndez, Augusto, Fernandez-Varo, Helena, Gallego, Sergi, Márquez, Andrés, Méndez Alcaraz, David Israel, Neipp, Cristian, Ortuño, Manuel, Pascual, Inmaculada   +8 more
core   +2 more sources

Valosin‐containing protein counteracts ATP‐driven dissolution of FUS condensates through its ATPase activity in vitro

FEBS Letters, EarlyView.
Biomolecular condensates formed by fused in sarcoma (FUS) are dissolved by high ATP concentrations yet persist in cells. Using a reconstituted system, we demonstrate that valosin‐containing protein (VCP), an AAA+ ATPase, counteracts ATP‐driven dissolution of FUS condensates through its D2 ATPase activity.
Hitomi Kimura, Shin‐ichi Tate, Kyota Yasuda   +2 more
wiley   +1 more source

Flexible digital modulation and coding synthesis for satellite communications [PDF]

An architecture and a hardware prototype of a flexible trellis modem/codec (FTMC) transmitter are presented. The theory of operation is built upon a pragmatic approach to trellis-coded modulation that emphasizes power and spectral efficiency.
Budinger, James, Hoerig, Craig, Tague, John, Vanderaar, Mark   +3 more
core   +1 more source

Approaching the ultimate capacity limit in deep-space optical communication

, 2019
The information capacity of an optical channel under power constraints is ultimately limited by the quantum nature of transmitted signals. We discuss currently available and emerging photonic technologies whose combination can be shown theoretically to ...
Arapoglou, Banaszek, Banaszek, Boroson, Brecht, Eisenberg, Holevo, Jarzyna, Jarzyna, Jarzyna, Moision, Sodnik   +11 more
core   +1 more source

Enhanced Kerr effect in vertically aligned deformed helix ferroelectric liquid crystals [PDF]

, 2014
We disclose the vertically aligned deformed helix ferroelectric liquid crystal (VADHFLC) whose Kerr constant ($K_{\mathrm{kerr}}\approx 130$~nm/V$^2$ at $\lambda=543$~nm) is one order of magnitude higher than any other value previously reported for ...
Chigrinov, V. G., Kiselev, Alexei D., Krivoshey, A. I., Kwok, H. -S., Minchenko, M. V., Pozhidaev, E. P., Srivastava, A. K., Vashchenko, V. V.   +7 more
core   +2 more sources

Linking neurogenesis, oligodendrogenesis, and myelination defects to neurodevelopmental disruption in primary mitochondrial disorders

FEBS Letters, EarlyView.
Mitochondrial remodeling shapes neural and glial lineage progression by matching metabolic supply with demand. Elevated OXPHOS supports differentiation and myelin formation, while myelin compaction lowers mitochondrial dependence, revealing mitochondria as key drivers of developmental energy adaptation.
Sahitya Ranjan Biswas, Porter L. Tomsick, Alicia M. Pickrell, Paul D. Morton   +3 more
wiley   +1 more source

Efficiency-Oriented DPS Implementation in Morphed Three-Phase Three-Level DAB for Light-Load EV Charging

IEEE Open Journal of Power Electronics
This work presents an efficiency-oriented modulation and morphing strategy for a three-phase three-level dual active bridge converter operating across both 800 V and 400 V electric vehicle battery systems.
Lohith Kumar Pittala, Francesca Grazian, Jiayi Geng, Gabriele Rizzoli, George Papafotiou, Mattia Ricco, Riccardo Mandrioli   +6 more
doaj   +1 more source

In vitro models of cancer‐associated fibroblast heterogeneity uncover subtype‐specific effects of CRISPR perturbations

Molecular Oncology, EarlyView.
Development of therapies targeting cancer‐associated fibroblasts (CAFs) necessitates preclinical model systems that faithfully represent CAF–tumor biology. We established an in vitro coculture system of patient‐derived pancreatic CAFs and tumor cell lines and demonstrated its recapitulation of primary CAF–tumor biology with single‐cell transcriptomics ...
Elysia Saputra, Shamsudheen Karuthedath Vellarikkal, Lixia Li, Hong Sun, Khoa Nguyen, Amber Montano, Suchitra Natarajan, Federica Piccioni, Alex Michael Tamburino, Xin Yu, Aleksandra Katarzyna Olow   +10 more
wiley   +1 more source