Results 111 to 120 of about 828,607 (304)

The nonlinear damping of Bose-Einstein condensate oscillations at ultra-low temperatures

, 2002
We analyze the damping of the transverse breathing mode in an elongated trap at ultralow temperatures. The damping occurs due to the parametric resonance entailing the energy transfer to the longitudinal degrees of freedom. It is found that the nonlinear
Chevy, Dalforo, Fedichev, Fliesser, Guilleumas, Jackson, Jin, Jin, Kagan, Kagan, L.A. Maksimov, Lifshitz, Marago, Mewes, Pitaevskii, Pitaevskii, Reidl, Rusch, Stamper-Kurn, Stringari, Stringari, Williams, Yu. Kagan   +22 more
core   +1 more source

Brainstem and Cerebellar Volume Loss and Associated Clinical Features in Progressive Supranuclear Palsy

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Introduction Progressive Supranuclear Palsy (PSP) is a neurodegenerative ‘tauopathy’ with predominating pathology in the basal ganglia and midbrain. Caudal tau spread frequently implicates the cerebellum; however, the pattern of atrophy remains equivocal.
Chloe Spiegel, Timothy P. Siejka, Cassandra Marotta, Josh J. Y. Lee, Kelly Bertram, Terence J. O'Brien, Meng Law, Lucy Vivash, Ian H. Harding   +8 more
wiley   +1 more source

A Broad Continuous Temperature Tunable DBR Single-Frequency Fiber Laser at 1064 nm

IEEE Photonics Journal, 2016
Based on a temperature-dependent longitudinal-mode-selection model, a broad temperature range for single-longitudinal-mode (SLM) operation of a short DBR phosphate fiber laser has been demonstrated.
Yuning Zhang, Can Li, Shanhui Xu, Huaqiu Deng, Zhouming Feng, Changsheng Yang, Xiang Huang, Yuanfei Zhang, Jiulin Gan, Zhongmin Yang   +9 more
doaj   +1 more source

Decay and renormalization of a longitudinal mode in a quasi-two-dimensional antiferromagnet. [PDF]

Nat Commun, 2021
Do SH, Zhang H, Williams TJ, Hong T, Garlea VO, Rodriguez-Rivera JA, Jang TH, Cheong SW, Park JH, Batista CD, Christianson AD.   +10 more
europepmc   +1 more source

Collective modes of an imbalanced unitary Fermi gas

, 2017
We study theoretically the collective mode spectrum of a strongly imbalanced two-component unitary Fermi gas in a cigar-shaped trap, where the minority species forms a gas of polarons.
Chevy, Frédéric, Goulko, Olga, Hofmann, Johannes, Lobo, Carlos   +3 more
core   +1 more source

CX3CL1 in Early Detection of Alzheimer's Disease: Plasma Dynamics Across Age and Disease Stages

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Backgrounds Alzheimer's disease (AD) is characterized by amyloid‐beta plaques, tau tangles, and neuroinflammation. C‐X3‐C motif chemokine ligand 1 (CX3CL1, also known as fractalkine), a neuroimmune chemokine implicated in AD pathogenesis, shows inconsistent alterations in plasma/serum across studies.
Ling Wang, Yujie Liu, Fei Li, Xuelin Li, Lanlan Li, Jie Zhang, Yali Xu   +6 more
wiley   +1 more source

Electro-Optic Fabry-Perot Etalon for Frequency Stabilization in in Single-Longitudinal Mode Nd:YVO₄ Laser

Applied Sciences
Single-longitudinal mode lasers are widely used as light sources in coherent lidars due to their narrow linewidth and long coherence length. However, we observed spontaneous frequency drift in a single-longitudinal mode laser, accompanied by the ...
Xiaojie Chen, Renpeng Yan, Zelong Liu, Yugang Jiang, Rongwei Fan, Xudong Li   +5 more
doaj   +1 more source

Harmonic lattice behavior of two-dimensional colloidal crystals

, 2004
Using positional data from video-microscopy and applying the equipartition theorem for harmonic Hamiltonians, we determine the wave-vector-dependent normal mode spring constants of a two-dimensional colloidal model crystal and compare the measured band ...
A. J. Hurd, A. K. Arora, A. K. Sood, G. Maret, H. H. von Grünberg, H. Löwen, J. M. A. Hofman, N. W. Ashcroft, P. Keim, P. M. Chaikin, P. P. J. M. Schram, U. Herz, V. M. Bedanov, W. Kress   +13 more
core   +1 more source

Neuroinflammation in GAD65 Antibody‐Associated Epilepsy Measured Using [18F]DPA‐714 PET/MRI

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT The timing for initiating immunotherapy in patients with glutamic acid decarboxylase 65 (GAD65) antibody‐associated epilepsy is a challenge. We used the translocator protein radioligand [18F]DPA‐714 and PET to evaluate brain microglial activation.
Jingjing Chen, Yuying Zhang, Heyu Zhang, Jinming Zhang, Ningning Wang, Xintong Guo, Yicong Liu, Yue Liu, Xiangsong Zhang, Ziyi Chen, Guanzhong Ni   +10 more
wiley   +1 more source

Aircraft longitudinal decoupling based on a singular perturbation approach

Advances in Mechanical Engineering, 2017
Aircraft longitudinal dynamics is approximated by short-time mode and phugoid mode from experience. In this article, a rigorous mathematical method is provided based on the singular perturbation theory to deal with this decoupling problem.
Shangqiu Shan, Zhongxi Hou, Wenkai Wang
doaj   +1 more source