Results 61 to 70 of about 222,692 (298)

Simulation of the temperature drift of the laser gyroscope path length

RUDN Journal of Engineering Research, 2023
The authors present the results of modeling the temperature drift of the resonator path length of a laser gyroscope based on a ring helium-neon laser with circular polarization of radiation and a magneto-optical frequency bias based on the Zeeman effect ...
Yaroslav A. Zubarev, Anton O. Sinelnikov, Victoria U. Mnatsakanyan   +2 more
doaj   +1 more source

Doppler-free frequency modulation spectroscopy of atomic erbium in a hollow cathode discharge cell

, 2011
The erbium atomic system is a promising candidate for an atomic Bose-Einstein condensate of atoms with a non-vanishing orbital angular momentum ($L \neq 0$) of the electronic ground state.
A.S. Bell, B. Dubetsky, B. Smeets, C.C. Bradley, D. Jaksch, D. Sukachev, G. Ritt, G.C. Bjorklund, G.G. Lister, G.K. Brennen, H. Brammer, I. Danshita, J. Ulitzsch, J.E. Lawler, J.J. McClelland, J.S. Ross, L. Santos, M. Lu, M. Weitz, O. Mandel, P. Buonsante, R. Bourouis, R. Grimm, T. Salger   +23 more
core   +1 more source

Large‐scale bidirectional arrayed genetic screens identify OXR1 and EMC4 as modifiers of αSynuclein aggregation

FEBS Open Bio, EarlyView.
Activation of the mitochondrial protein OXR1 increases pSyn129 αSynuclein aggregation by lowering ATP levels and altering mitochondrial membrane potential, particularly in response to MSA‐derived fibrils. In contrast, ablation of the ER protein EMC4 enhances autophagic flux and lysosomal clearance, broadly reducing α‐synuclein aggregates.
Sandesh Neupane, Lea Nikolić, Lorenzo Maraio, Thomas Goiran, Nathan Karpilovsky, Stefano Sellitto, Vangelis Bouris, Jiang‐An Yin, Ronald Melki, Edward A Fon, Adriano Aguzzi, Elena De Cecco   +11 more
wiley   +1 more source

Quantum computation with phase drift errors [PDF]

, 1997
We present results of numerical simulations of the evolution of an ion trap quantum computer made out of 18 ions which are subject to a sequence of nearly 15000 laser pulses in order to find the prime factors of N=15.
A. Barenco, C. Miquel, César Miquel, D. Beckman, J. I. Cirac, J. I. Cirac, Juan Pablo Paz, P. W. Shor, R. B. Griffiths, R. Feynman, V. Vedral, W. H. Zurek, Wojciech Hubert Zurek   +12 more
core   +2 more sources

The Tale of the Residual Tail: Insights From Continuous Intracranial Monitoring From Post‐Hippocampectomy Dynamics

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Subtotal hippocampal resection can leave residual hippocampal tissue, yet the immediate postoperative electrophysiologic evolution of such remnants is unknown. We describe a patient with drug‐resistant temporal lobe epilepsy in whom a hippocampal remnant was continuously monitored using a responsive neurostimulator (RNS) following subtotal ...
Patrick Hartnett, Syeda Amrah Hashmi, Amaan Qureshi, Heather Spader, Shayan Moosa, Ifrah Zawar   +5 more
wiley   +1 more source

Laser frequency stabilization using a spatially multiplexed microfabricated Rb vapor cell

Applied Physics Express
We demonstrate a laser stabilization based on a spatially-multiplexed, microfabricated rubidium vapor cell. This design integrates multiple optical apertures within a cell, enabling a single input beam to simultaneously capture both Doppler-broadened and
Seji Kang, Soyeon Choi, Jaeuk Baek, Sang Eon Park, Jongcheol Park, Yeeun Na, Taeg Yong Kwon, Sang-Bum Lee, Jae Hoon Lee, Sangwon Seo, Young-Ho Park, Meung Ho Seo, Hyun-Gue Hong   +12 more
doaj   +1 more source

Fast, precise, and widely tunable frequency control of an optical parametric oscillator referenced to a frequency comb

, 2017
Optical frequency combs (OFC) provide a convenient reference for the frequency stabilization of continuous-wave lasers. We demonstrate a frequency control method relying on tracking over a wide range and stabilizing the beat note between the laser and ...
Glöckner, Rosa, Prehn, Alexander, Rempe, Gerhard, Zeppenfeld, Martin   +3 more
core   +1 more source

Subpicosecond laser timing stabilization [PDF]

IEEE Journal of Quantum Electronics, 1989
The 0.25 Hz-25 kHz pulse timing fluctuations of a Nd:YAG CW-mode-locked laser are reduced from 20.6 ps to less than 0.30 ps rms by an electronic phase-lock loop. Stabilizer design considerations include the laser phase control characteristics, phase detector additive noise, and spurious detection of the laser amplitude noise by the loop phase detector.
M.J.W. Rodwell, D.M. Bloom, K.J. Weingarten   +2 more
openaire   +1 more source

β‐Catenin/c‐Myc Axis Modulates Autophagy Response to Different Ammonia Concentrations

Advanced Biology, Volume 9, Issue 3, March 2025.
Ammonia, detoxified by the liver into urea and glutamine, impacts autophagy differently at varying levels. Low ammonia activates autophagy via c‐Myc and β‐catenin, while high levels suppress it. Using Huh7 cells and Spf‐ash mice, c‐Myc's role in cytoprotective autophagy is revealed, offering insights into hyperammonemia and potential therapeutic ...
S. Sergio, B. Spedicato, G. Corallo, A. Inguscio, M. Greco, D. Musarò, D. Vergara, A. F. Muro, G. De Sabbata, L. R. Soria, N. Brunetti Pierri, M. Maffia   +11 more
wiley   +1 more source

Effect of laser treatment on postural control parameters in patients with chronic nonspecific low back pain: a randomized placebo-controlled trial [PDF]

Brazilian Journal of Medical and Biological Research, 2019
The management of nonspecific lumbar pain (NSLP) using laser irradiation remains controversial. A systematic review of recently published studies indicates that the effects of laser therapy are commonly assessed using only imperfect methods in terms of ...
J. Taradaj, K. Rajfur, J. Rajfur, K. Ptaszkowski, L. Ptaszkowska, M. Sopel, J. Rosińczuk, R. Dymarek   +7 more
doaj   +1 more source