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Journal articles on the topic 'Coherence time enhancement'

Author: Grafiati

Published: 10 March 2023

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1

Zhao, Zhenxing, Qi Li, Zhi Xia, and Dajing Shang. "A Single-Hydrophone Coherent-Processing Method for Line-Spectrum Enhancement." Remote Sensing 15, no. 3 (2023): 659. http://dx.doi.org/10.3390/rs15030659.

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Improving the line-spectrum detection capability of a single hydrophone is of great significance for the passive detection of small underwater platforms. In this paper, we propose a single-hydrophone cross-power spectrum (SHCS) method based on time-domain coherence. This method uses the coherence of the line spectrum and the non-coherence of the continuous spectrum noise to obtain coherent gain and improve the signal-to-noise ratio (SNR) of the line spectrum. The effects of the input SNR, number of averaging operations, and overlap ratio on the performance of the SHCS method under a background

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Hammer, Horst, Silvia Kuny, and Antje Thiele. "Enhancing Coherence Images for Coherent Change Detection: An Example on Vehicle Tracks in Airborne SAR Images." Remote Sensing 13, no. 24 (2021): 5010. http://dx.doi.org/10.3390/rs13245010.

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In Synthetic Aperture Radar (SAR) interferometry, one of the most widely used measures for the quality of the interferometric phase is coherence. However, in favorable conditions coherence can also be used to detect subtle changes on the ground, which are not visible in the amplitude images. For such applications, i.e., coherent change detection, it is important to have a good contrast between the unchanged (high-coherence) parts of the scene and the changed (low-coherence) parts. In this paper, an algorithm is introduced that aims at enhancing this contrast. The enhancement is achieved by a c

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Paolo, Agustin Di, Arne L. Grimsmo, Peter Groszkowski, Jens Koch та Alexandre Blais. "Control and coherence time enhancement of the 0–π qubit". New Journal of Physics 21, № 4 (2019): 043002. http://dx.doi.org/10.1088/1367-2630/ab09b0.

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4

Rahman, Abdul Ghaffar Abdul, Zhi Chao Ong, and Zubaidah Ismail. "Enhancement of coherence functions using time signals in Modal Analysis." Measurement 44, no. 10 (2011): 2112–23. http://dx.doi.org/10.1016/j.measurement.2011.08.003.

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Shreedhar Bhat, Gautam, Nikhil Shankar, and Issa Panahi. "Real-time joint dereverberation and speech enhancement for hearing aid applications using edge devices." Journal of the Acoustical Society of America 150, no. 4 (2021): A348. http://dx.doi.org/10.1121/10.0008541.

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In this work, we propose a joint dereverberation and speech enhancement technique for real-time applications. Speech dereverberation is based on the coherent-to-diffuse energy ratio (CDR) measured from the direction-of-arrival (DOA) dependent complex spatial coherence function. A personalized speech enhancement (SE) technique based on joint maximum a posteriori probability (JMAP) estimation that inherently accounts for the effects of changes in acoustic path and reverberation is used. The combination of these masking functions is used to enhance the speech corrupted by reverberation and noise

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WANG, LI, YUBING GONG, and XIU LIN. "ENHANCEMENT OF INTRINSIC SPIKING COHERENCE BY EXTERNAL NON-GAUSSIAN NOISE IN A STOCHASTIC HODGKIN–HUXLEY NEURON." Fluctuation and Noise Letters 10, no. 04 (2011): 359–69. http://dx.doi.org/10.1142/s0219477511000624.

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In this paper, we study the effect of external non-Gaussian noise on the temporal coherence of the intrinsic spiking induced by the channel noise in a stochastic Hodgkin–Huxley neuron. It is found that, for a sufficiently large membrane patch, the intrinsic spiking coherence can be enhanced by the proper values of non-Gaussian noise's strength, correlation time, or deviation from Gaussian distribution. And that the intrinsic spiking can exhibit coherence resonance when the noise's strength is optimal. This implies that the channel noise-induced intrinsic spiking may become more or the most ord

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Nakano, Tamami, Haruhisa Ota, Nobumasa Kato, and Shigeru Kitazawa. "Deficit in visual temporal integration in autism spectrum disorders." Proceedings of the Royal Society B: Biological Sciences 277, no. 1684 (2009): 1027–30. http://dx.doi.org/10.1098/rspb.2009.1713.

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Individuals with autism spectrum disorders (ASD) are superior in processing local features. Frith and Happe conceptualize this cognitive bias as ‘weak central coherence’, implying that a local enhancement derives from a weakness in integrating local elements into a coherent whole. The suggested deficit has been challenged, however, because individuals with ASD were not found to be inferior to normal controls in holistic perception. In these opposing studies, however, subjects were encouraged to ignore local features and attend to the whole. Therefore, no one has directly tested whether individ

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AWSCHALOM, DAVID D. "CONTROLLING SPIN COHERENCE WITH SEMICONDUCTOR NANOSTRUCTURES." International Journal of Modern Physics B 22, no. 01n02 (2008): 111–12. http://dx.doi.org/10.1142/s0217979208046165.

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We present two emerging opportunities for manipulating and communicating coherent spin states in semiconductors. First, we show that semiconductor microcavities offer unique means of controlling light-matter interactions in confined geometries, resulting in a wide range of applications in optical communications and inspiring proposals for quantum information processing and computational schemes. Studies of spin dynamics in microcavities — a new and promising research field — have revealed novel effects such as polarization beats, stimulated spin scattering, and giant Faraday rotation. Here, we

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Ding, Xueli, Bing Jia, Yuye Li, and Huaguang Gu. "Enhancement of coherence resonance induced by inhibitory autapse in Hodgkin–Huxley model." International Journal of Modern Physics B 35, no. 07 (2021): 2150110. http://dx.doi.org/10.1142/s0217979221501101.

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Inhibitory effect often suppresses electronic activities of the nervous system. In this paper, the inhibitory autapse is identified to enhance the degree of coherence resonance (CR) induced by noise in the Hodgkin–Huxley (HH) model with Hopf bifurcation from resting state to spiking with nearly fixed period [Formula: see text]. Without noise, the inhibitory autapse can induce a post inhibitory rebound (PIR) spike from the resting state at time delay approximating [Formula: see text] and can inhibit a spike of spiking at time delay approximating [Formula: see text]. In the presence of noise, CR

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Abd-Elmoniem, K. Z., A. B. M. Youssef, and Y. M. Kadah. "Real-time speckle reduction and coherence enhancement in ultrasound imaging via nonlinear anisotropic diffusion." IEEE Transactions on Biomedical Engineering 49, no. 9 (2002): 997–1014. http://dx.doi.org/10.1109/tbme.2002.1028423.

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11

Xie, Ping, Yingying Hao, Xiaoling Chen, et al. "Enhancement of functional corticomuscular coupling after transcranial ultrasound stimulation in mice." Journal of Neural Engineering 19, no. 2 (2022): 026014. http://dx.doi.org/10.1088/1741-2552/ac5c8b.

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Abstract Objective. Transcranial ultrasound stimulation (TUS), a large penetration depth and high spatial resolution technology, has developed rapidly in recent years. This study aimed to explore and evaluate the neuromodulation effects of TUS on mouse motor neural circuits under different parameters. Approach. Our study used functional corticomuscular coupling (FCMC) as an index to explore the modulation mechanism for movement control under different TUS parameters (intensity [ I sppa ] and stimulation duration). We collected local field potential (LFP) and tail electromyographic (EMG) data u

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Alqahtani, Faisal, and Abdullatif A. Al-Shuhail. "Imaging subtle faults using azimuthal coherence attribute: A case study from Central Saudi Arabia." GeoArabia 17, no. 4 (2012): 43–54. http://dx.doi.org/10.2113/geoarabia170443.

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ABSTRACT The coherence attribute is an edge detection method that is widely used for interpreting faults on 3-D seismic time slices. The traditional coherence attribute is calculated on migrated volumes using traces from all available azimuths. It has recently been shown that calculating coherence along specific azimuths can enhance the detection of faults running perpendicular to those azimuths. In this study, we applied azimuthal coherence attribute analysis on a 3-D seismic data set from a gas field in Central Saudi Arabia. We generated four migrated 3-D data volumes sorted by azimuth in ad

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13

Zhu, Dai Zhu, and Wen Hua Huang. "The Technology of Line-Spectrum Enhancement Based on Image Processing." Advanced Materials Research 429 (January 2012): 308–12. http://dx.doi.org/10.4028/www.scientific.net/amr.429.308.

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Time-frequency spectrogram analysis is a basic method in passive radar and sonar. It′s necessary to enhance the line-spectrum to improve the performance in low SNR(Signal to Noise Ratio) and strong interference presented that wider detecting range and long reacting time can be obtained. The traditional line-spectrum enhancing technology based on signal′s coherence can′t work well in very low SNR, and the performance will drop sharply when the line-spectrums are close in frequencies or the number of line-spectrums increases. A new method which combines image processing with signal processing is

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Kanngiesser, Jonas, and Bernhard Roth. "Wavefront Shaping Concepts for Application in Optical Coherence Tomography—A Review." Sensors 20, no. 24 (2020): 7044. http://dx.doi.org/10.3390/s20247044.

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Optical coherence tomography (OCT) enables three-dimensional imaging with resolution on the micrometer scale. The technique relies on the time-of-flight gated detection of light scattered from a sample and has received enormous interest in applications as versatile as non-destructive testing, metrology and non-invasive medical diagnostics. However, in strongly scattering media such as biological tissue, the penetration depth and imaging resolution are limited. Combining OCT imaging with wavefront shaping approaches significantly leverages the capabilities of the technique by controlling the sc

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Zhang, Han Hua, Yu Ming Wang, and Qian Song. "Application of PCA-CFAR-MNF to Image Enhancement for a UGV FLGPR." Applied Mechanics and Materials 190-191 (July 2012): 656–60. http://dx.doi.org/10.4028/www.scientific.net/amm.190-191.656.

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The UGV (Unmanned Ground Vehicle) FLGPR (Forward-Looking Ground Penetrating Radar) imaging model spatially variable characteristics lead to the relatively low image SCR (Signal-Clutter Ratio). In order to improve the image quality and improve the SCR, the coherence properties of the target in image sequences is used for image enhancement. That is, images from the same region at different time sequence are enhanced two times. First of all, CFAR (Constant False Alarm Rate) is a preliminary step to enhance the image sequence, and then PCA-CFAR-MNF enhancement algorithm is proposed: according to t

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Castellanos, Nazareth P., Eduardo Malmierca, Angel Nuñez, and Valeri A. Makarov. "Corticofugal Modulation of the Tactile Response Coherence of Projecting Neurons in the Gracilis Nucleus." Journal of Neurophysiology 98, no. 5 (2007): 2537–49. http://dx.doi.org/10.1152/jn.00815.2007.

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Precise and reproducible spike timing is one of the alternatives of the sensory stimulus encoding. We test coherence (repeatability) of the response patterns elicited in projecting gracile neurons by tactile stimulation and its modulation provoked by electrical stimulation of the corticofugal feedback from the somatosensory (SI) cortex. To gain the temporal structure we adopt the wavelet-based approach for quantification of the functional stimulus–neural response coupling. We show that the spontaneous firing patterns (when they exist) are essentially random. Tactile stimulation of the neuron r

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17

Yilmaz, Ergin, Veli Baysal, and Mahmut Ozer. "Enhancement of temporal coherence via time-periodic coupling strength in a scale-free network of stochastic Hodgkin–Huxley neurons." Physics Letters A 379, no. 26-27 (2015): 1594–99. http://dx.doi.org/10.1016/j.physleta.2015.04.016.

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18

Yun, Jungmi, and Hyoung Sook Park. "THE EFFECT OF SENSE OF COHERENCE ENHANCEMENT PROGRAM BASED ON SALUTOGENESIS FOR ELDERLY WITH METABOLIC SYNDROME." Innovation in Aging 3, Supplement_1 (2019): S142. http://dx.doi.org/10.1093/geroni/igz038.513.

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Abstract This study aimed to develop and verify a sense of coherence (SOC) enhancement program based on salutogenesis for elderly with metabolic syndrome. This study was a quasi-experimental study. The inclusion criteria were patients with metabolic syndrome aged 60 or over who visited the outpatient department of a university hospital and a public health center located in an urban area. The intervention group (n=24) attended the SOC enhancement program. The health promotion theoretical framework, salutogenesis, provided the program structure and conceptual framework of this study. This progra

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19

Tao, Zhifu, Wenping Zhang, Mudi Yao, et al. "A Joint Model for Macular Edema Analysis in Optical Coherence Tomography Images Based on Image Enhancement and Segmentation." BioMed Research International 2021 (February 17, 2021): 1–9. http://dx.doi.org/10.1155/2021/6679556.

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Optical coherence tomography (OCT) provides the visualization of macular edema which can assist ophthalmologists in the diagnosis of ocular diseases. Macular edema is a major cause of vision loss in patients with retinal vein occlusion (RVO). However, manual delineation of macular edema is a laborious and time-consuming task. This study proposes a joint model for automatic delineation of macular edema in OCT images. This model consists of two steps: image enhancement using a bioinspired algorithm and macular edema segmentation using a Gaussian-filtering regularized level set (SBGFRLS) algorith

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Sun, Yankui, Tian Zhang, Yue Zhao, and Yufan He. "3D automatic segmentation method for retinal optical coherence tomography volume data using boundary surface enhancement." Journal of Innovative Optical Health Sciences 09, no. 02 (2016): 1650008. http://dx.doi.org/10.1142/s1793545816500085.

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With the introduction of spectral-domain optical coherence tomography (SD-OCT), much larger image datasets are routinely acquired compared to what was possible using the previous generation of time-domain OCT. Thus, there is a critical need for the development of three-dimensional (3D) segmentation methods for processing these data. We present here a novel 3D automatic segmentation method for retinal OCT volume data. Briefly, to segment a boundary surface, two OCT volume datasets are obtained by using a 3D smoothing filter and a 3D differential filter. Their linear combination is then calculat

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21

Li, Gang, Shihong Zhou, Zhen Kong, and Mengyuan Guo. "Closed-Loop Attention Restoration Theory for Virtual Reality-Based Attentional Engagement Enhancement." Sensors 20, no. 8 (2020): 2208. http://dx.doi.org/10.3390/s20082208.

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Today, as media and technology multitasking becomes pervasive, the majority of young people face a challenge regarding their attentional engagement (that is, how well their attention can be maintained). While various approaches to improve attentional engagement exist, it is difficult to produce an effect in younger people, due to the inadequate attraction of these approaches themselves. Here, we show that a single 30-min engagement with an attention restoration theory (ART)-inspired closed-loop software program (Virtual ART) delivered on a consumer-friendly virtual reality head-mounted display

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22

Al-Shargie, Fares, Usman Tariq, Omnia Hassanin, Hasan Mir, Fabio Babiloni, and Hasan Al-Nashash. "Brain Connectivity Analysis Under Semantic Vigilance and Enhanced Mental States." Brain Sciences 9, no. 12 (2019): 363. http://dx.doi.org/10.3390/brainsci9120363.

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In this paper, we present a method to quantify the coupling between brain regions under vigilance and enhanced mental states by utilizing partial directed coherence (PDC) and graph theory analysis (GTA). The vigilance state is induced using a modified version of stroop color-word task (SCWT) while the enhancement state is based on audio stimulation with a pure tone of 250 Hz. The audio stimulation was presented to the right and left ears simultaneously for one-hour while participants perform the SCWT. The quantification of mental states was performed by means of statistical analysis of indexes

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23

Li, Yan, Songhua Yan, Jianya Gong, and Fanku Zeng. "SNR Enhancement of Back Scattering Signals for Bistatic Radar Based on BeiDou GEO Satellites." Remote Sensing 13, no. 7 (2021): 1254. http://dx.doi.org/10.3390/rs13071254.

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Using scattering signals of the global navigation satellite system (GNSS) for target detection has become one of the research hotspots. This technology faces the difficulty of low signal-to-noise ratio (SNR) target echoes. Since BeiDou geostationary orbit (GEO) satellites provide the opportunity to form a bistatic radar with some advantages, such as fixed coverage area and quasi monostatic configuration to avoid the interference from the direct signals, the target echoes may have regular phases that are beneficial to SNR enhancement. This study uses BeiDou GEO satellites and ground fixed recei

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Chilson, P. B., S. Kirkwood, and I. Häggström. "Frequency domain interferometry mode observations of PMSE using the EISCAT VHF radar." Annales Geophysicae 18, no. 12 (2000): 1599–612. http://dx.doi.org/10.1007/s00585-001-1599-8.

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Abstract. During the summer of 1997 investigations into the nature of polar mesosphere summer echoes (PMSE) were conducted using the European incoherent scatter (EISCAT) VHF radar in Norway. The radar was operated in a frequency domain interferometry (FDI) mode over a period of two weeks to study the frequency coherence of the returned radar signals. The operating frequencies of the radar were 224.0 and 224.6 MHz. We present the first results from the experiment by discussing two 4-h intervals of data collected over two consecutive nights. During the first of the two days an enhancement of the

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Graham, David G., and Matthew R. Banks. "Advances in upper gastrointestinal endoscopy." F1000Research 4 (December 16, 2015): 1457. http://dx.doi.org/10.12688/f1000research.6961.1.

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The rapidly moving technological advances in gastrointestinal endoscopy have enhanced an endoscopist’s ability to diagnose and treat lesions within the gastrointestinal tract. The improvement in image quality created by the advent of high-definition and magnification endoscopy, alongside image enhancement, produces images of superb quality and detail that empower the endoscopist to identify important lesions that have previously been undetectable. Additionally, we are now seeing technologies emerge, such as optical coherence tomography and confocal laser endomicroscopy, that allow the endoscop

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Luo, Lu, Na Xu, Qian Wang, and Liang Li. "Disparity in interaural time difference improves the accuracy of neural representations of individual concurrent narrowband sounds in rat inferior colliculus and auditory cortex." Journal of Neurophysiology 123, no. 2 (2020): 695–706. http://dx.doi.org/10.1152/jn.00284.2019.

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The central mechanisms underlying binaural unmasking for spectrally overlapping concurrent sounds, which are unresolved in the peripheral auditory system, remain largely unknown. In this study, frequency-following responses (FFRs) to two binaurally presented independent narrowband noises (NBNs) with overlapping spectra were recorded simultaneously in the inferior colliculus (IC) and auditory cortex (AC) in anesthetized rats. The results showed that for both IC FFRs and AC FFRs, introducing an interaural time difference (ITD) disparity between the two concurrent NBNs enhanced the representation

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Shen, Hongyan, Yueying Yan, Xinxin Li, Xin Wan, Qin Li, and Yidong Li. "Enhancement of GPR Diffracted Waves Processing: A Case Study from Taiyuan, China." Journal of Environmental and Engineering Geophysics 24, no. 2 (2019): 237–47. http://dx.doi.org/10.2113/jeeg24.2.237.

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Mined-out areas, caves, voids and cavities usually appear as diffracted waves on ground penetrating radar (GPR) profiles. Therefore, the complete extraction of diffracted waves forms the foundation of the efficient usage of the GPR technique in geological surveys. We propose a method of enhancing GPR diffracted waves via singular value decomposition (SVD) filtering and establish an effective GPR data processing flowchart. First, the shallow and deep signal energies were controlled within a certain dynamic range by energy scaling in the traces. Next, the SVD filtering process was employed to su

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Murray, Brendan P., and Miguel D. Bustamante. "Energy flux enhancement, intermittency and turbulence via Fourier triad phase dynamics in the 1-D Burgers equation." Journal of Fluid Mechanics 850 (July 6, 2018): 624–45. http://dx.doi.org/10.1017/jfm.2018.454.

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We present a theoretical and numerical study of Fourier-space triad phase dynamics in the one-dimensional stochastically forced Burgers equation at Reynolds number $Re\approx 2.7\times 10^{4}$. We demonstrate that Fourier triad phases over the inertial range display a collective behaviour characterised by intermittent periods of synchronisation and alignment, reminiscent of the Kuramoto model (Chemical Oscillations, Waves, and Turbulence, Springer, 1984) and directly related to collisions of shocks in physical space. These periods of synchronisation favour efficient energy fluxes across the in

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Volvach, A., and G. Kurbasova. "MODEL OF INSOLATION OF THE EARTH SURFACE IN THE KARA-DAG LOCALITY ACCORDING TO SSE DATA." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 2 (85) (2019): 51–58. http://dx.doi.org/10.17721/1728-2713.85.07.

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Anomalous enhancement of solar insolation of the earth's surface in the presence of foci of excitation in its depths can cause a response at local sites. Such foci include, first of all, recent and past (retro) volcanoes, such as the ancient volcano on the territory of Kara-Dag in the Crimea. The authors of this article have found increased, in comparison with other localities of the Crimea, general insolation according to SSE. According to the 22-year linear trend, the rate of insolation growth falling on the earth's surface at Kara-Dag has been calculated, which is 2,69 kWh/m2 per century, b

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Dash, Sonali, P. Satish Rama Chowdary, V. V. S. S. S. Chakravarthy, et al. "Real Time Retinal Optic Disc Segmentation via Guided filter and Discrete Wavelet Transform." Journal of Physics: Conference Series 2312, no. 1 (2022): 012007. http://dx.doi.org/10.1088/1742-6596/2312/1/012007.

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Abstract In the world, glaucoma is the one of the main causes for loosing vision. Optical Coherence Tomography or fundus camera is utilized to capture the optic disc and optic cup images. For the detection of glaucoma and afterwards monitoring the patients, investigation of the head of optic nerve or cup-to-disc ratio (CDR) is an important factor. For computing the CDR value, segmentation of optic disc and optic cup are utilized for the isolation of the relevant parts of the fundus image. Even though ophthalmologists are computing the CDR value physically, however, it limits the identification

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Lim, Zi Li, Kai Leong Chong, Guang-Yu Ding, and Ke-Qing Xia. "Quasistatic magnetoconvection: heat transport enhancement and boundary layer crossing." Journal of Fluid Mechanics 870 (May 14, 2019): 519–42. http://dx.doi.org/10.1017/jfm.2019.232.

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We present a numerical study of quasistatic magnetoconvection in a cubic Rayleigh–Bénard (RB) convection cell subjected to a vertical external magnetic field. For moderate values of the Hartmann number $Ha$ (characterising the strength of the stabilising Lorentz force), we find an enhancement of heat transport (as characterised by the Nusselt number $Nu$). Furthermore, a maximum heat transport enhancement is observed at certain optimal $Ha_{opt}$. The enhanced heat transport may be understood as a result of the increased coherence of the thermal plumes, which are elementary heat carriers of th

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Tu Anh, Le, Nguyen Thi Thu Ha, Nguyen Thanh Tra, Bui Hai Ninh, Nguyen Khac Tiep, and Ninh The Son. "Chemical constituents from the stem barks of polyscias serrata balf." Vietnam Journal of Science and Technology 60, no. 6 (2022): 966–73. http://dx.doi.org/10.15625/2525-2518/16656.

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Plants of the genus Polyscias (the family Araliaceae) are represented as perennial shrubs and are commonly cultivated in southeastern Asia and the Pacific regions. Pharmacological studies revealed that Polyscias crude extracts and their isolated compounds exhibited a variety of biological activity, such as antibacterial, antifungal, cytotoxic, immuno-stimulant, wound healing and anti-asthmatic activities. For the first time, phytochemical study on the methanol (MeOH) extract of the stem barks of Vietnamese species Polyscias serrata Balf. (locally named Dinh lang rang) resulted in the isolation

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Liang, Liming, Xiaoqi Sheng, Bowen Liu, and Zhimin Lan. "A Level Set Method with Region-Scalable Fitting Energy for Retinal Layer Segmentation in Spectral-Domain Optical Coherence Tomography Images." Journal of Medical Imaging and Health Informatics 10, no. 2 (2020): 326–35. http://dx.doi.org/10.1166/jmihi.2020.2905.

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Retinal layer segmentation of spectral-domain optical coherence tomography images plays an important role during diagnosis and analysis of ophthalmic diseases. In this paper, a novel variational level set framework with region-scalable fitting energy is proposed for automated retinal layer segmentation in SD-OCT. To the best of our knowledge, it is the first time that level set based method succeeds in ten retinal layers segmentation. The proposed framework consists of three steps. First, an anisotropic nonlinear diffusion filter is applied for speckle noise reduction and ROI contrast enhancem

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Naniyil, Vineetha, Yijia Zhou, Guy Simmonds, Nathan Cooper, Weibin Li, and Lucia Hackermüller. "Observation of collectivity enhanced magnetoassociation of ⁶Li in the quantum degenerate regime." New Journal of Physics 24, no. 11 (2022): 113005. http://dx.doi.org/10.1088/1367-2630/ac9b81.

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Abstract The association process of Feshbach molecules is well described by a Landau–Zener (LZ) transition above the Fermi temperature, such that two-body physics dominates the dynamics. However, using 6Li atoms and the associated Feshbach resonance at B r = 834.1 G, we observe an enhancement of the atom–molecule coupling as the fermionic atoms reach degeneracy, demonstrating the importance of many-body coherence not captured by the conventional LZ model. In the experiment, we apply a linear association ramp ranging from adiabatic to non-equilibrium molecule association for various temperature

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Lai, E. V., B. De Marco, A. A. Zdziarski, et al. "The X-ray spectral-timing contribution of the stellar wind in the hard state of Cyg X-1." Monthly Notices of the Royal Astronomical Society 512, no. 2 (2022): 2671–85. http://dx.doi.org/10.1093/mnras/stac688.

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ABSTRACT The clumpy stellar wind from the companion star in high-mass X-ray binaries causes variable, partial absorption of the emission from the X-ray source. We studied XMM–Newton observations from a 7.22 d long monitoring campaign, in order to constrain the effects of the stellar wind on the short-time-scale X-ray spectral-timing properties of Cygnus X-1. We find these properties to change significantly in the presence of the wind. In particular, the longest sampled time-scales (corresponding to temporal frequencies of ν ∼ 0.1–1 Hz) reveal an enhancement of the fractional variability power,

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Wang, Dawei, Hongliu Zeng, Shiguo Wu, Weiwei Wang, Qingping Li, and Lijun Mi. "Seismic sedimentological evidence for filling process of western Central Canyon System controlled by the evolution of the Tibetan Plateau and the East Asia monsoon since the Late Miocene, South China Sea." Interpretation 6, no. 2 (2018): SD41—SD55. http://dx.doi.org/10.1190/int-2017-0176.1.

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Three-dimensional blended data, comprised of amplitude and coherence cubes, are used to analyze the evolution of the Central Canyon System (CCS) since the Late Miocene within the western Qiongdongnan Basin (QDNB), South China Sea. The evolution of the canyon since the late Miocene includes two phases and five stages, with a dramatic change of deepwater sediment bodies from early, predominantly axial channel-levee deposits (CLDs) to late, primarily side mass-transport deposits (MTD). During the first and second stages (approximately 5.3–3.7 Ma), axial CLDs derived from the western slope of the

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Simões, M., M. M. Telo da Gama, and A. Nunes. "Stochastic fluctuations in epidemics on networks." Journal of The Royal Society Interface 5, no. 22 (2007): 555–66. http://dx.doi.org/10.1098/rsif.2007.1206.

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The effects of demographic stochasticity on the long-term behaviour of endemic infectious diseases have been considered for long as a necessary addition to an underlying deterministic theory. The latter would explain the regular behaviour of recurrent epidemics and the former the superimposed noise of observed incidence patterns. Recently, a stochastic theory based on a mechanism of resonance with internal noise has shifted the role of stochasticity closer to the centre stage, by showing that the major dynamic patterns found in the incidence data can be explained as resonant fluctuations, whos

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Versolato, O. O., L. W. Wansbeek, G. S. Giri, et al. "Atomic parity violation in a single trapped radium ionThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at École de Physique, les Houches, France, 30 May – 4 June, 2010." Canadian Journal of Physics 89, no. 1 (2011): 65–68. http://dx.doi.org/10.1139/p10-051.

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Atomic parity violation (APV) experiments are sensitive probes of the electroweak interaction at low energy. These experiments are competitive with and complementary to high-energy collider experiments. The APV signal is strongly enhanced in heavy atoms, and it is measurable by exciting suppressed (M1, E2) transitions. The predicted enhancement factor of the APV effect in the S-D transition in Ra+ is about 50 times larger than the S-S transition in neutral Cs. However, certain spectroscopic information on Ra+, needed to constrain the required atomic many-body theory, was lacking. Using the AGO

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Shao, Pei-Lin, Jiunn-Der Liao, Shun-Cheng Wu, Yu-Hsing Chen, and Tak-Wah Wong. "Microplasma Treatment versus Negative Pressure Therapy for Promoting Wound Healing in Diabetic Mice." International Journal of Molecular Sciences 22, no. 19 (2021): 10266. http://dx.doi.org/10.3390/ijms221910266.

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The delayed healing response of diabetic wounds is a major challenge for treatment. Negative pressure wound therapy (NPWT) has been widely used to treat chronic wounds. However, it usually requires a long treatment time and results in directional growth of wound healing skin tissue. We investigated whether nonthermal microplasma (MP) treatment can promote the healing of skin wounds in diabetic mice. Splint excision wounds were created on diabetic mice, and various wound healing parameters were compared among MP treatment, NPWT, and control groups. Quantitative analysis of the re-epithelializat

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Bauer, Alexander, Benjamin Schwarz, and Dirk Gajewski. "Utilizing diffractions in wavefront tomography." GEOPHYSICS 82, no. 2 (2017): R65—R73. http://dx.doi.org/10.1190/geo2016-0396.1.

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Wavefront tomography is known to be an efficient and stable approach for velocity inversion that does not require accurate starting models and does not interact directly with the prestack data. Instead, the original data are transformed to physically meaningful wavefront attribute fields. These can be automatically estimated using local-coherence analysis by means of the common-reflection-surface (CRS) stack, which has been shown to be a powerful tool for data analysis and enhancement. In addition, the zero-offset wavefront attributes acquired during the CRS stack can be used for sophisticated

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Korner, Anthony. "The embodiment of language." Language, Context and Text 4, no. 1 (2022): 26–60. http://dx.doi.org/10.1075/langct.21010.kor.

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Abstract In this paper an understanding of psychotherapeutic conversation is outlined emphasising whole-body functioning. The underpinning of conversation by both Central and Autonomic Nervous Systems (CNS & ANS) and evolutionary developments that support social engagement and language are considered. An idea will be taken up that for psychotherapy, language needs to be understood within each patient as more than meets the eye, rather than less, providing a potential for exchanges in the therapeutic conversation that enhance the growth of self for each individual. The notion of culminative

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Sülsen, Valeria P., Fernanda M. Frank, Silvia I. Cazorla, et al. "Trypanocidal and Leishmanicidal Activities of Sesquiterpene Lactones from Ambrosia tenuifolia Sprengel (Asteraceae)." Antimicrobial Agents and Chemotherapy 52, no. 7 (2008): 2415–19. http://dx.doi.org/10.1128/aac.01630-07.

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ABSTRACT Bioassay-guided fractionation of the organic extract of Ambrosia tenuifolia Sprengel (Asteraceae) led to the isolation of two bioactive sesquiterpene lactones with significant trypanocidal and leishmanicidal activities. By spectroscopic methods (1H- and 13C-nuclear magnetic resonance, distortionless enhancement by polarization transfer, correlated spectroscopy, heteronuclear multiple-quantum coherence, electron impact-mass spectrometry, and infrared spectroscopy), these compounds were identified as psilostachyin and peruvin. Both compounds showed a marked in vitro trypanocidal activit

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Perrodin, Catherine, Christoph Kayser, Nikos K. Logothetis, and Christopher I. Petkov. "Natural asynchronies in audiovisual communication signals regulate neuronal multisensory interactions in voice-sensitive cortex." Proceedings of the National Academy of Sciences 112, no. 1 (2014): 273–78. http://dx.doi.org/10.1073/pnas.1412817112.

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When social animals communicate, the onset of informative content in one modality varies considerably relative to the other, such as when visual orofacial movements precede a vocalization. These naturally occurring asynchronies do not disrupt intelligibility or perceptual coherence. However, they occur on time scales where they likely affect integrative neuronal activity in ways that have remained unclear, especially for hierarchically downstream regions in which neurons exhibit temporally imprecise but highly selective responses to communication signals. To address this, we exploited naturall

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London, Frédéric, Hélène Zéphir, Nawal Hadhoum, et al. "Optic nerve double inversion recovery hypersignal in patients with clinically isolated syndrome is associated with asymptomatic gadolinium-enhanced lesion." Multiple Sclerosis Journal 25, no. 14 (2018): 1888–95. http://dx.doi.org/10.1177/1352458518815797.

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Background: Optic nerve involvement is not considered in dissemination in space (DIS) or time (DIT) of multiple sclerosis (MS) lesions. Objectives: To evaluate frequency of optic nerve involvement using three-dimensional (3D)-double inversion recovery (DIR) sequence in clinically isolated syndrome (CIS) and to measure its relationship with DIS and DIT (2010 and 2017 McDonald criteria). Methods: From November 2013 to August 2016, 57 CIS patients underwent 3T-magnetic resonance imaging (3T-MRI) including 3D-DIR sequence and optical coherence tomography (OCT) at 3 months after CIS. We assessed si

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Wang, Mengyuan, Yuye Ling, Zhenxing Dong, et al. "GPU-accelerated iterative method for FD-OCT image reconstruction with an image-level cross-domain regularizer." Optics Express 31, no. 2 (2023): 1813. http://dx.doi.org/10.1364/oe.478970.

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The image reconstruction for Fourier-domain optical coherence tomography (FD-OCT) could be achieved by iterative methods, which offer a more accurate estimation than the traditional inverse discrete Fourier transform (IDFT) reconstruction. However, the existing iterative methods are mostly A-line-based and are developed on CPU, which causes slow reconstruction. Besides, A-line-based reconstruction makes the iterative methods incompatible with most existing image-level image processing techniques. In this paper, we proposed an iterative method that enables B-scan-based OCT image reconstruction,

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Stąsiek, Jan, Adam Stąsiek, and Marek Szkodo. "Modeling of Passive and Forced Convection Heat Transfer in Channels with Rib Turbulators." Energies 14, no. 21 (2021): 7059. http://dx.doi.org/10.3390/en14217059.

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The main goal of the research presented in this paper was the experimental and numerical analysis of heat enhancement and aerodynamic phenomena during air flow in a channel equipped with flow turbulators in the form of properly configured ribs. The use of ribs intensifies the heat transfer and at the same time increases not only the flow resistance but also the energy costs. Therefore, designing modern heat exchangers with optimal thermal and flow parameters requires the knowledge of the theory of heat exchangers as well as measurement methods and numerical calculations. Bearing in mind the ab

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Schubert, Tina, Steffen Rausch, Omar Fahmy, Georgios Gakis, and Arnulf Stenzl. "Optical improvements in the diagnosis of bladder cancer: implications for clinical practice." Therapeutic Advances in Urology 9, no. 11 (2017): 251–60. http://dx.doi.org/10.1177/1756287217720401.

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Background For over 100 years white-light cystoscopy has remained the gold-standard technique for the detection of bladder cancer (BCa). Some limitations in the detection of flat lesions (CIS), the differentiation between inflammation and malignancy, the inaccurate determination of the tumor margin status as well as the tumor depth, have led to a variety of technological improvements. The aim of this review is to evaluate the impact of these improvements in the diagnosis of BCa and their effectiveness in clinical practice. Methods A systematic literature search was conducted according to the P

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Garway-Heath, David F., Haogang Zhu, Qian Cheng, et al. "Combining optical coherence tomography with visual field data to rapidly detect disease progression in glaucoma: a diagnostic accuracy study." Health Technology Assessment 22, no. 4 (2018): 1–106. http://dx.doi.org/10.3310/hta22040.

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Background Progressive optic nerve damage in glaucoma results in vision loss, quantifiable with visual field (VF) testing. VF measurements are, however, highly variable, making identification of worsening vision (‘progression’) challenging. Glaucomatous optic nerve damage can also be measured with imaging techniques such as optical coherence tomography (OCT). Objective To compare statistical methods that combine VF and OCT data with VF-only methods to establish whether or not these allow (1) more rapid identification of glaucoma progression and (2) shorter or smaller clinical trials. Design Me

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Lin, Yi, Xinran Fan, Yueqi Chen, et al. "Neurocognitive Dynamics of Prosodic Salience over Semantics during Explicit and Implicit Processing of Basic Emotions in Spoken Words." Brain Sciences 12, no. 12 (2022): 1706. http://dx.doi.org/10.3390/brainsci12121706.

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How language mediates emotional perception and experience is poorly understood. The present event-related potential (ERP) study examined the explicit and implicit processing of emotional speech to differentiate the relative influences of communication channel, emotion category and task type in the prosodic salience effect. Thirty participants (15 women) were presented with spoken words denoting happiness, sadness and neutrality in either the prosodic or semantic channel. They were asked to judge the emotional content (explicit task) and speakers’ gender (implicit task) of the stimuli. Results

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Khan, Nawazish A., та M. Usman Muzaffar. "Decoupling of the CuO2 plane and superconductivity in Cu0.5Tl0.5Ba2(Ca2−ySry)Cu3O10−δ(y = 0–0.4) samples". International Journal of Modern Physics B 30, № 17 (2016): 1650097. http://dx.doi.org/10.1142/s0217979216500971.

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[Formula: see text]–[Formula: see text] samples have been synthesized at normal pressure at 860[Formula: see text]C. The main objectives of these experiments to study the role of inter-plane decoupling in suppressing the superconductivity of high temperature superconductors (HTSC). These samples have shown orthorhombic crystal structure and the [Formula: see text]-axis length increases with increased Sr-doping. All the samples have shown metallic variations of resistivity [Formula: see text] from room temperature down to the onset of superconductivity. The magnitude of the superconductivity is

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