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Journal articles on the topic 'Coherence'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Concha, Soledad, Soledad Aravena, Carmen Julia Coloma, and Verónica Romero. "Escritura expositiva en tres niveles de escolaridad: coherencia y dominio de recursos lingüísticos." Literatura y Lingüística, no. 21 (June 26, 2015): 75. http://dx.doi.org/10.29344/0717621x.21.135.

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ResumenEl estudio explora la capacidad de estudiantes de tres niveles de escolaridad –5° Básico,1° Medio y 4° Medio– para producir textos expositivos coherentes utilizando los recursos lingüísticos con que se construye la coherencia local en la escritura expositiva. Se trabajó con alumnos de dos colegios municipalizados de Santiago, quienes redactaron textos expositivos a partir de un ítem de respuesta abierta extensa. Sus textos fueron codificados con dos rúbricas para medir la coherencia local (CL) y los recursos lingüísticos involucrados en la coherencia local (RCL). Los resultados muestran

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2

Le, Thai-Hoa, and Dong-Anh Nguyen. "TEMPORO-SPECTRAL COHERENT STRUCTURE OF TURBULENCE AND PRESSURE USING FOURIER AND WAVELET TRANSFORMS." ASEAN Journal on Science and Technology for Development 25, no. 2 (2017): 405–17. http://dx.doi.org/10.29037/ajstd.271.

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Studying the spatial distribution in coherent fields such as turbulent and turbulent-induced force ones is important to model and evaluate turbulent-induced forces and response of structures on the turbulent flows. Turbulent field-based coherent function is commonly used for the spatial distribution characteristic of induced forces in the frequency domain. This paper will focus to study spectral coherent structure of turbulence and forces in not only the frequency domain using conventional Fourier transform-based coherence, but also temporo-spectral coherent one in the time-frequency plane tha

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3

Jung, Jungkyo, and Sang-Ho Yun. "Evaluation of Coherent and Incoherent Landslide Detection Methods Based on Synthetic Aperture Radar for Rapid Response: A Case Study for the 2018 Hokkaido Landslides." Remote Sensing 12, no. 2 (2020): 265. http://dx.doi.org/10.3390/rs12020265.

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Damage mapping using Synthetic Aperture Radar (SAR) imagery has been studied in recent decades to support rapid response to natural disasters. Many researches have been developing coherent and incoherent change detection. However, their performances can vary depending on the types of the damages, the characteristics of the scatterers and the corresponding capability of algorithms. In particular, the coherence-based methods have been used as promising detectors over urban areas where high coherences are observed, but their detection accuracies still remain controversial over the area where low

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4

Zhu, Ruidan, Meixia Ruan, Hao Li, et al. "Vibrational and vibronic coherences in the energy transfer process of light-harvesting complex II revealed by two-dimensional electronic spectroscopy." Journal of Chemical Physics 156, no. 12 (2022): 125101. http://dx.doi.org/10.1063/5.0082280.

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The presence of quantum coherence in light-harvesting complex II (LHCII) as a mechanism to understand the efficiency of the light-harvesting function in natural photosynthetic systems is still debated due to its structural complexity and weak-amplitude coherent oscillations. Here, we revisit the coherent dynamics and clarify different types of coherences in the energy transfer processes of LHCII using a joint method of the high-S/N transient grating and two-dimensional electronic spectroscopy. We find that the electronic coherence decays completely within 50 fs at room temperature. The vibrati

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5

Fan, Zhaobing, Zewen Shan, and Haitao Ma. "Partial Recovery of Coherence Loss in Coherence-Assisted Transformation." Entropy 25, no. 10 (2023): 1375. http://dx.doi.org/10.3390/e25101375.

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Coherence-assisted transformation under incoherent operations is discussed. For transformation from the pure state to the mixed state, we show that the coherence loss can be partially recovered by adding auxiliary coherent states. First, we discuss the coherence-assisted transformation for qubit states and give the sufficient and necessary condition for the partial recovery of coherence loss, and the maximum of the recovery of coherence loss is also studied in this case. Second, the maximally coherent state can be obtained in the above recovery scheme, so we give the full characterization of o

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6

Wang, Bang-Hai, Zi-Heng Ding, Zhihao Ma, and Shao-Ming Fei. "Common Coherence Witnesses and Common Coherent States." Entropy 23, no. 9 (2021): 1136. http://dx.doi.org/10.3390/e23091136.

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We show the properties and characterization of coherence witnesses. We show methods for constructing coherence witnesses for an arbitrary coherent state. We investigate the problem of finding common coherence witnesses for certain class of states. We show that finitely many different witnesses W1,W2,⋯,Wn can detect some common coherent states if and only if ∑i=1ntiWi is still a witnesses for any nonnegative numbers ti(i=1,2,⋯,n). We show coherent states play the role of high-level witnesses. Thus, the common state problem is changed into the question of when different high-level witnesses (coh

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7

Qin, Lei, Frank L. Vernon, Christopher W. Johnson, and Yehuda Ben‐Zion. "Spectral Characteristics of Daily to Seasonal Ground Motion at the Piñon Flats Observatory from Coherence of Seismic Data." Bulletin of the Seismological Society of America 109, no. 5 (2019): 1948–67. http://dx.doi.org/10.1785/0120190070.

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Abstract We investigate coherences of seismic data recorded during three years (2015–2017) at the Piñon Flats Observatory (PY) array and a collocated 148 m deep borehole station B084, along with oceanic data from a buoy southwest of the PY array. Seismic and barometric recordings at PY stations are analyzed with a multitaper spectral technique. The coherence of signals from seismic sources is >0.6 at 0.05–8 Hz between closely spaced (<65 m) surface stations and decreases to ∼0.2 in frequency bands in which the wavelengths are smaller than interstation distances. There are several local c

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8

Hájek, Alan. "Is Strict Coherence Coherent?" Dialectica 66, no. 3 (2012): 411–24. http://dx.doi.org/10.1111/j.1746-8361.2012.01310.x.

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9

Baker, Stuart N., Elizabeth M. Pinches, and Roger N. Lemon. "Synchronization in Monkey Motor Cortex During a Precision Grip Task. II. Effect of Oscillatory Activity on Corticospinal Output." Journal of Neurophysiology 89, no. 4 (2003): 1941–53. http://dx.doi.org/10.1152/jn.00832.2002.

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Recordings from primary motor cortex (M1) during periods of steady contraction show oscillatory activity; these oscillations are coherent with the activity of contralateral muscles. We investigated synchronization of corticospinal output neurons with the oscillations, which could provide the pathway for their transmission to the spinal motoneurons. One hundred seventy-six antidromically identified pyramidal tract neurons (PTNs) were recorded from M1 in three macaque monkeys trained to perform a precision grip task. Local field potentials (LFP) were simultaneously recorded. All analysis was con

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10

LIM, WOOCHANG, and SANG-YOON KIM. "STOCHASTIC SPIKING COHERENCE IN COUPLED SUBTHRESHOLD MORRIS-LECAR NEURONS." International Journal of Modern Physics B 23, no. 05 (2009): 703–10. http://dx.doi.org/10.1142/s0217979209049991.

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We consider a large population of globally coupled subthreshold Morris-Lecar neurons. By varying the noise intensity D, we numerically investigate stochastic spiking coherence (i.e., collective coherence between noise-induced neural spikings). As D passes a lower threshold, a transition from an incoherent to a coherent state occurs because of a constructive role of noise to stimulate coherence between noise-induced spikings. However, when passing a higher threshold of D, another transition from a coherent to an incoherent state takes place due to a destructive role of noise to spoil the spikin

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11

Cao, De-Wei, Yixin Zhang, Jicheng Wang, and Zheng-Da Hu. "Quantum coherence in a coupled-cavity array." International Journal of Modern Physics B 30, no. 18 (2016): 1650114. http://dx.doi.org/10.1142/s0217979216501149.

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The dynamical properties of quantum coherence in the system of two-coupled-cavities, each of which resonantly interacts with a two-level atom, is investigated via the relative entropy measure. We focus on the coherences for the atom–atom, atom–cavity and cavity–cavity subsystems and find that the dynamical behaviors of these coherences depend largely on the cavity–cavity coupling, which may indicate the Mott insulator-superfluid transition in the thermodynamic limit. We also study the influences of the initial cavity–cavity correlation on the coherences and show that the initial correlation of

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12

Lukin, Igor, and Vladimir Lukin. "Propagation of a Partially Coherent Bessel–Gaussian Beam in a Uniform Medium and Turbulent Atmosphere." Photonics 11, no. 6 (2024): 562. http://dx.doi.org/10.3390/photonics11060562.

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In this paper, the coherent properties of partially coherent Bessel–Gaussian optical beams propagating through a uniform medium (free space) or a turbulent atmosphere are examined theoretically. The consideration is based on the analytical solution of the equation for the transverse second-order mutual coherence function of the field of partially coherent optical radiation in a turbulent atmosphere. For the partially coherent Bessel–Gaussian beam, the second-order mutual coherence function of the source field is taken as a Gaussian–Schell model. In this approximation, we analyze the behavior o

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13

GÜLERCE, MUSTAFA, and GAZANFER ÜNAL. "FORECASTING OF OIL AND AGRICULTURAL COMMODITY PRICES: VARMA VERSUS ARMA." Annals of Financial Economics 12, no. 03 (2017): 1750012. http://dx.doi.org/10.1142/s2010495217500129.

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The aim of this paper is to show that the estimates made with vector autoregressive–moving-average (ARMA) models based on the coherent time intervals of the multiple time series give more precise results than the univariate case. The previous literature on dynamic correlations (co-movement) in between food and energy prices has mixed results and mainly based on parametric approaches. Therefore, partial wavelet coherence (PWC) and multiple wavelet coherence (MWC) methods are used, respectively, to uncover the coherency simultaneously for time and frequency domains. In our study; world oil, corn

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14

Nopita, Dewi. "CONSTRUCTING COHERENT IDEAS AND USING COHERENCE DEVICES IN WRITTEN DESCRIPTIVE ESSAYS: A Study at the Fourth Grade English Department Students of STBA Haji Agus Salim Bukittinggi." Lingua Didaktika: Jurnal Bahasa dan Pembelajaran Bahasa 4, no. 2 (2011): 96. http://dx.doi.org/10.24036/ld.v4i2.1260.

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This paper derived from the research results conducted in 2011, looks into the skill of the fourth grade English department students of STBA Haji Agus Salim Bukittinggi in constructing coherent ideas and in using coherence devices in writing descriptive essays. The students’ skill in constructing coherent ideas concerned the relevance and the order of ideas and in using coherence devices concerned the repetitions of the key words/nouns and the use of pronouns and transitional signals. The research results show that the students had weak skill in constructing coherent ideas and had low average

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15

Fu, Liangxue, Fengli Yan, and Ting Gao. "Block-coherence measures and coherence measures based on positive-operator-valued measures." Communications in Theoretical Physics 74, no. 2 (2022): 025104. http://dx.doi.org/10.1088/1572-9494/ac42c2.

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Abstract We study block-coherence measures based on the resource theory of block-coherence and coherence measures based on positive-operator-valued measures (POVM). Several block-coherence measures are presented, including the block-coherence measure based on maximum relative entropy, the one-shot block-coherence cost under maximally block-incoherent operations, and the coherence measure based on coherent rank. Their relationships are obtained. Moreover, we describe the deterministic coherence dilution process by constructing block-incoherent operations. Based on the POVM coherence resource th

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16

Setiawan, Fiki, and Taiman Taiman. "COHESION AND COHERENCE IN WRITTEN TEXTS OF HEALTH MEDICAL LABORATORY STUDENTS." Indonesian EFL Journal 7, no. 1 (2021): 59–68. https://doi.org/10.25134/ieflj.v7i1.3991.

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Good writing, which is cohesive and coherent, must pay attention to the relationship between sentences. Cohesive and coherence are essential textual components to create the organized and comprehensiveness of the texts. This research aims to identify the use of cohesion devices and coherence made by the students in their writing texts. This study applied a descriptive qualitative method. The study's object was eight explanation texts written by linguistic learning style students of Health Medical Laboratory An Nasher Cirebon in the academic year of 2019/2020, who were taking English subjects.

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17

Kahnt, Maik, Konstantin Klementiev, Vahid Haghighat, et al. "Measurement of the coherent beam properties at the CoSAXS beamline." Journal of Synchrotron Radiation 28, no. 6 (2021): 1948–53. http://dx.doi.org/10.1107/s1600577521009140.

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The CoSAXS beamline at the MAX IV Laboratory is a modern multi-purpose (coherent) small-angle X-ray scattering (CoSAXS) instrument, designed to provide intense and optionally coherent illumination at the sample position, enabling coherent imaging and speckle contrast techniques. X-ray tracing simulations used to design the beamline optics have predicted a total photon flux of 1012–1013 photons s−1 and a degree of coherence of up to 10% at 7.1 keV. The normalized degree of coherence and the coherent flux of this instrument were experimentally determined using the separability of a ptychographic

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18

Kahnt, Maik, Konstantin Klementiev, Vahid Haghighat, et al. "Measurement of the coherent beam properties at the CoSAXS beamline." Journal of Synchrotron Radiation 28, no. 6 (2021): 1948–53. http://dx.doi.org/10.1107/s1600577521009140.

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The CoSAXS beamline at the MAX IV Laboratory is a modern multi-purpose (coherent) small-angle X-ray scattering (CoSAXS) instrument, designed to provide intense and optionally coherent illumination at the sample position, enabling coherent imaging and speckle contrast techniques. X-ray tracing simulations used to design the beamline optics have predicted a total photon flux of 1012–1013 photons s−1 and a degree of coherence of up to 10% at 7.1 keV. The normalized degree of coherence and the coherent flux of this instrument were experimentally determined using the separability of a ptychographic

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19

Kamrath, Matthew J., Vladimir Ostashev, D. Keith Wilson, Michael J. White, Carl R. Hart, and Anthony Finn. "Temporal coherence of sound propagated along vertical paths through the atmosphere." Journal of the Acoustical Society of America 150, no. 4 (2021): A336. http://dx.doi.org/10.1121/10.0008493.

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Reductions in signal coherence caused by atmospheric turbulence constrain the performance of signal processing methods. This presentation compares theoretical predictions and measurements of acoustic temporal coherence, which describes the similarity of a signal at two times. Combining sound propagation theory with turbulence models yields the theoretical coherence. To be applicable to vertical and slanted propagation, the turbulence models use height-dependent variances and length scales for the fluctuations in temperature, shear-produced velocity, and buoyancy-produced velocity. Meteorologic

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20

Hammerness, Karen. "From Coherence in Theory to Coherence in Practice." Teachers College Record: The Voice of Scholarship in Education 108, no. 7 (2006): 1241–65. http://dx.doi.org/10.1177/016146810610800704.

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Historically, one of the central concerns that has plagued the field of teacher education is the observation that fragmentation characterizes the experience of learning to teach. Too often, university-based teacher education programs consist of a set of disconnected individual courses; separate clinical work from coursework; and lack a vision of teaching and learning. Therefore, some teacher educators have argued that creating structurally and conceptually coherent programs will result in more powerful learning for prospective teachers. Yet, although empirical work on such programs is growing,

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21

Martínez-Herrero, Rosario, Gemma Piquero, Juan Carlos González de Sande, Massimo Santarsiero, and Franco Gori. "Besinc Pseudo-Schell Model Sources with Circular Coherence." Applied Sciences 9, no. 13 (2019): 2716. http://dx.doi.org/10.3390/app9132716.

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Partially coherent sources with non-conventional coherence properties present unusual behaviors during propagation, which have potential application in fields like optical trapping and microscopy. Recently, partially coherent sources exhibiting circular coherence have been introduced and experimentally realized. Among them, the so-called pseudo Schell-model sources present coherence properties that depend only on the difference between the radial coordinates of two points. Here, the intensity and coherence properties of the fields radiated from pseudo Schell-model sources with a degree of cohe

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22

Ding Chaoliang, 丁超亮, 亓协兴 Qi Xiexing та 潘留占 Pan Liuzhan. "时空相干涡旋中的相干开关". Acta Optica Sinica 42, № 20 (2022): 2026004. http://dx.doi.org/10.3788/aos202242.2026004.

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23

Cuthbert, John. "Book Review: Coherent about Coherence?" Expository Times 116, no. 6 (2005): 208. http://dx.doi.org/10.1177/001452460511600612.

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Kobayashi, Yuki, and Stephen R. Leone. "Characterizing coherences in chemical dynamics with attosecond time-resolved x-ray absorption spectroscopy." Journal of Chemical Physics 157, no. 18 (2022): 180901. http://dx.doi.org/10.1063/5.0119942.

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Coherence can drive wave-like motion of electrons and nuclei in photoexcited systems, which can yield fast and efficient ways to exert materials’ functionalities beyond the thermodynamic limit. The search for coherent phenomena has been a central topic in chemical physics although their direct characterization is often elusive. Here, we highlight recent advances in time-resolved x-ray absorption spectroscopy (tr-XAS) to investigate coherent phenomena, especially those that utilize the eminent light source of isolated attosecond pulses. The unparalleled time and state sensitivities of tr-XAS in

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Zuljan Kumar, Danila. "Strategies for establishing discourse coherence. The case of Slovene dialectal discourse." Dialectologia et Geolinguistica 30, no. 1 (2022): 51–68. http://dx.doi.org/10.1515/dialect-2022-0003.

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Abstract A discourse is considered coherent only if all its parts are semantically related to each other and if it makes sense. However, coherence cannot be attributed to a discourse in advance because it depends on how the participants understand what they hear/ read. So we can say that it is not the discourse that establishes coherence, but the participants according to their understanding of a discourse. In practise, this means that for the same discourse there are at least two coherences that may or may not match up. Usually they match up to some extent because participants follow the coop

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Sweklej, Joanna, Robert Balas, Grzegorz Pochwatko, and Małgorzata Godlewska. "Automatic effects of processing fluency in semantic coherence judgments and the role of transient and tonic affective states." Polish Psychological Bulletin 46, no. 1 (2015): 151–58. http://dx.doi.org/10.1515/ppb-2015-0020.

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Abstract Recent literature reported that judgments of semantic coherence are influenced by a positive affective response due to increased fluency of processing. The presented paper investigates whether fluency of processing can be modified by affective responses to the coherent stimuli as well as an automaticity of processes involved in semantic coherence judgments. The studies employed the dyads of triads task in which participants are shown two word triads and asked to solve a semantically coherent one or indicate which of the two is semantically coherent. Across two studies in a dualtask pa

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27

Chen, Shixian, Xiaojie Li, Kaixuan Wu, and Jiadong Shi. "Quantum coherence in a superconducting circuit coupled with a dissipative cavity field." Laser Physics Letters 19, no. 10 (2022): 105202. http://dx.doi.org/10.1088/1612-202x/ac867a.

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Abstract Quantum coherence represents a basic feature of a quantum system that is not present in the classical world. Here, we explore the dynamic behaviors of quantum coherence in two charge qubits who are strongly coupled with a single-mode dissipative cavity field. The results show that quantum coherence is sensitive to the coupled system parameters including qubit dissipation rate, initial qubit distribution angle, and coherent state intensity of the cavity field. Additionally, during the dynamic evolution, quantum coherence behaves periodically in the case of the qubit distribution angle,

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Sinjela, Kwangaika Mwala, Jimmy Kijai, and Josephine Esther Katenga. "Teachers´ Perception of Coherence in High School Biology Textbooks in Zambia." Abstract Proceedings International Scholars Conference 7, no. 1 (2019): 1444–68. http://dx.doi.org/10.35974/isc.v7i1.926.

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Introduction: Textbook coherence is an important aspect of effective teacher´s instruction and performance of students. This study involved assessing coherence of senior biology high school textbooks in Zambia (MK Biology10, Longman Biology11 and Pupil´s Biology12) and the extent to which these books are aligned with the biology course syllabus.  Methods: Using quantitative research design, coherence was conceptualized as a unit of three constructs: alignment and organization, rigor, focus and relevance of contents and connections among ideas. A questionnaire instrument was developed whi

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Cheung, Mei-chun, Agnes S. Chan, Yvonne M. Han, and Sophia L. Sze. "Brain Activity During Resting State in Relation to Academic Performance." Journal of Psychophysiology 28, no. 2 (2014): 47–53. http://dx.doi.org/10.1027/0269-8803/a000107.

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EEG coherence has been widely used to investigate brain activity and learning. However, relatively little is known about the relationship between resting-state EEG coherence and academic performance. The present study investigated this relationship with 140 healthy, normal participants. EEG was recorded during resting periods, with eyes open for 3 min, and the recordings were analyzed for 64 electrode positions in the theta (4–8 Hz), alpha (8–12 Hz), and beta (12–25 Hz) frequency bands. Coherence, defined as the spectral cross-correlation between two signals normalized by their power spectra,

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Wright, Michael J., and Kevin N. Gurney. "Coherence and Motion Transparency in Rigid and Nonrigid Plaids." Perception 26, no. 5 (1997): 553–67. http://dx.doi.org/10.1068/p260553.

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Under a wide range of conditions, stimuli composed of two superimposed grating components with unequal rotation velocities (differing in sign and/or magnitude) gave a striking percept of a single, coherent, nonrigidly deforming plaid surface. Conversely, component angular velocities of the same sign and magnitude yielded rigidly rotating plaids. Rigidity and motion coherence were shown to be independent percepts, and coherent plaids were categorised unambiguously as rigid or nonrigid. Coherence and motion transparency were found to depend upon the relative orientation of components, and polar

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Narasimhachar, Varun. "The coherent measurement cost of coherence distillation." Quantum 9 (April 15, 2025): 1707. https://doi.org/10.22331/q-2025-04-15-1707.

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Quantum coherence—an indispensable resource for quantum technologies—is known to be distillable from a noisy form using operations that cannot create it. However, distillation exacts a hidden coherent measurement cost, which has not previously been examined. We devise the target effect construction to characterize this cost through detailed conditions on the coherence-measuring structure necessary in any process realizing exact (maximal or non-maximal) or approximate distillation. As a corollary, we lower-bound the requisite measurement coherence, as quantified by operationally-relevant measur

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Neupane, Sujaya, Daniel Guitton, and Christopher C. Pack. "Coherent alpha oscillations link current and future receptive fields during saccades." Proceedings of the National Academy of Sciences 114, no. 29 (2017): E5979—E5985. http://dx.doi.org/10.1073/pnas.1701672114.

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Oscillations are ubiquitous in the brain, and they can powerfully influence neural coding. In particular, when oscillations at distinct sites are coherent, they provide a means of gating the flow of neural signals between different cortical regions. Coherent oscillations also occur within individual brain regions, although the purpose of this coherence is not well understood. Here, we report that within a single brain region, coherent alpha oscillations link stimulus representations as they change in space and time. Specifically, in primate cortical area V4, alpha coherence links sites that en

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Díaz, María García, Kun Fang, Xin Wang, et al. "Using and reusing coherence to realize quantum processes." Quantum 2 (October 19, 2018): 100. http://dx.doi.org/10.22331/q-2018-10-19-100.

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Coherent superposition is a key feature of quantum mechanics that underlies the advantage of quantum technologies over their classical counterparts. Recently, coherence has been recast as a resource theory in an attempt to identify and quantify it in an operationally well-defined manner. Here we study how the coherence present in a state can be used to implement a quantum channel via incoherent operations and, in turn, to assess its degree of coherence. We introduce the robustness of coherence of a quantum channel-which reduces to the homonymous measure for states when computed on constant-out

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LUKIN, I. P. "COHERENCE DISTRIBUTION IN THE CROSS-SECTION OF A PARTIALLY COHERENT VORTEX-FREE BESSEL-GAUSSIAN BEAM." Izvestiya vysshikh uchebnykh zavedenii. Fizika 67, no. 10 (2024): 92–101. https://doi.org/10.17223/00213411/67/10/12.

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This paper is devoted to the theoretical study of the coherence distribution in the cross-section of a partially coherent vortex-free Bessel-Gaussian beam propagating in a uniform medium. Based on the Huygens - Fresnel principle, we obtained a second-order mutual coherence function of a given beam in a paraxial approximation. It turned out that there is a dependence of the coherence degree and the integral scale of coherence of a partially coherent vortex-free Bessel-Gaussian beam on both the correlation width of the source field and the sum coordinate and mutual orientation of the vectors of

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Palato, Samuel, Hélène Seiler, Parmeet Nijjar, Oleg Prezhdo, and Patanjali Kambhampati. "Atomic fluctuations in electronic materials revealed by dephasing." Proceedings of the National Academy of Sciences 117, no. 22 (2020): 11940–46. http://dx.doi.org/10.1073/pnas.1916792117.

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The microscopic origin and timescale of the fluctuations of the energies of electronic states has a significant impact on the properties of interest of electronic materials, with implication in fields ranging from photovoltaic devices to quantum information processing. Spectroscopic investigations of coherent dynamics provide a direct measurement of electronic fluctuations. Modern multidimensional spectroscopy techniques allow the mapping of coherent processes along multiple time or frequency axes and thus allow unprecedented discrimination between different sources of electronic dephasing. Ex

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Xiong, Deyi, and Min Zhang. "A Topic-Based Coherence Model for Statistical Machine Translation." Proceedings of the AAAI Conference on Artificial Intelligence 27, no. 1 (2013): 977–83. http://dx.doi.org/10.1609/aaai.v27i1.8566.

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Coherence that ties sentences of a text into a meaningfully connected structure is of great importance to text generation and translation. In this paper, we propose a topic-based coherence model to produce coherence for document translation, in terms of the continuity of sentence topics in a text. We automatically extract a coherence chain for each source text to be translated. Based on the extracted source coherence chain, we adopt a maximum entropy classifier to predict the target coherence chain that defines a linear topic structure for the target document. The proposed topic-based coherenc

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Lukin, I. P. "Coherence of vortex pseudo-Bessel beams in turbulent atmosphere." Computer Optics 43, no. 6 (2019): 926–35. http://dx.doi.org/10.18287/2412-6179-2019-43-6-926-935.

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Theoretical research of coherent properties of vortex conic waves propagating in a turbulent atmosphere was developed. The analysis was based on the analytical solution of the equation for the transverse second-order mutual coherence function of a light field. The following characteristics of coherence of vortex conic waves were considered: the coherence degree, the coherence radius, the root-mean-square and the integral scale of coherence degree. Dependence of these characteristics on the parameters of optical radiation and turbulent atmosphere was analyzed. Unlike the coherence radius, the r

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Sun, Weihong, Xiangyu Meng, Junchao Ren, Huainan Yu, and Yong Wang. "Research on the Vortex States of Partially Coherent Vortex Beams." Photonics 12, no. 4 (2025): 358. https://doi.org/10.3390/photonics12040358.

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The Mutual Optical Intensity (MOI) model is further developed to simulate the propagation of partially coherent X-ray vortex beams through free space. The intensity, phase, and amplitude distributions of the degree of coherence in the far field zone are numerically calculated using the MOI model. The effects of the coherence property and topological charge on the vortex beam are analyzed. For Gaussian Schell-model vortex beams, a vortex structure appears around the coherence singularity at the amplitude distribution of the degree of coherence relative to the central point. The number and rotat

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Anindita, Widyashanti Kunthara. "Cohesion and Coherence Problems Among Non-Native English Students’ Writing Essays." Lensa: Kajian Kebahasaan, Kesusastraan, dan Budaya 14, no. 1 (2024): 58. http://dx.doi.org/10.26714/lensa.14.1.2024.58-79.

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In order to properly organize ideas and express significant information, non-native students sometimes struggle with cohesion and coherence in their essays. This study examines the body of literature to pinpoint frequent problems non-native writers have while trying to make their writing coherent and cohesive. This study aims to assess the literature on cohesion and coherence issues in essays written by non-native students, with a particular focus on a number of components, including referential and relational coherence, theme and rheme, and grammatical and lexical cohesion. The literature stu

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Dare, Tyler, and Sean Collier. "Interpretation and use of coherence in multi-channel measurements." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 269, no. 1 (2024): 1373–82. http://dx.doi.org/10.3397/nc_2024_0181.

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The coherence function can be a powerful tool when analyzing data from multi-channel measurements. Often, coherence is used to describe the amount of incoherent noise in an output signal, though more generally the coherence between two signals is a representation of the linearity of the relationship between the signals as a function of frequency. Such degradation in the coherence then can be understood to not only be caused by potential incoherent noise, but also by moving sensors or a changing acoustic environment. Aside from its use as a diagnostic tool, coherence can also be used to conditi

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Cong, Haisheng, Jianfeng Sun, Zhiyong Lu, et al. "Intrapulse coherence degradation suppressing method of echo signal in coherent lidar." Chinese Optics Letters 21, no. 7 (2023): 071201. http://dx.doi.org/10.3788/col202321.071201.

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Simmons, James A., Kelsey N. Hom, and Andrea Megela Simmons. "Temporal coherence of harmonic frequencies affects echo detection in the big brown bat, Eptesicus fuscus." Journal of the Acoustical Society of America 154, no. 5 (2023): 3321–27. http://dx.doi.org/10.1121/10.0022444.

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Echolocating big brown bats (Eptesicus fuscus) broadcast frequency modulated (FM) ultrasonic pulses containing two prominent harmonic sweeps (FM1, FM2). Both harmonics typically return as echoes at the same absolute time delay following the broadcast, making them coherent. Electronically splitting FM1 and FM2 allows their time delays to be controlled separately, making them non-coherent. Earlier work shows that big brown bats discriminate coherent from split harmonic, non-coherent echoes and that disruptions of harmonic coherence produce blurry acoustic images. A psychophysical experiment on t

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Koscholke, Jakob, Michael Schippers, and Alexander Stegmann. "New Hope for Relative Overlap Measures of Coherence." Mind 128, no. 512 (2018): 1261–84. http://dx.doi.org/10.1093/mind/fzy037.

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Abstract Relative overlap measures of coherence have recently been shown to have two devastating properties: (i) according to the plain relative overlap measure, the degree of coherence of any set of propositions cannot be increased by adding further propositions, and (ii) according to the refined relative overlap measure, no set can be more coherent than its most coherent two-element subset. This result has been taken to rule out relative overlap as a foundation for a probabilistic explication of coherence. The present paper shows that this view is premature: we propose a relative overlap mea

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Canrinus, Esther T., Kirsti Klette, and Karen Hammerness. "Diversity in Coherence: Strengths and Opportunities of Three Programs." Journal of Teacher Education 70, no. 3 (2017): 192–205. http://dx.doi.org/10.1177/0022487117737305.

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Although teacher educators may perceive their program and courses to be coherent, the question remains to what extent student teachers also are able to perceive the linkages within their programs. Coherence within teacher education programs is important for teacher candidates to build understanding of teaching. Our study draws upon survey data from 269 teacher candidates, in three different teacher education programs, located in three different countries (Norway, Finland, United States [California]) and compares these candidates’ perceptions of the coherence of their teacher education programs

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Kwon, Ji-Hwan, Joohyun Lee, Je In Lee, Byeong-Gwan Cho, and Sooheyong Lee. "Exploring TEM Coherence Properties via Speckle Contrast Analysis in Coherent Electron Scattering of Amorphous Material." Nanomaterials 13, no. 23 (2023): 3016. http://dx.doi.org/10.3390/nano13233016.

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We investigate the coherence properties of a transmission electron microscope by analyzing nano-diffraction speckles originating from bulk metallic glass. The spatial correlation function of the coherent diffraction patterns, obtained in the transmission geometry, reveals the highly coherent nature of the electron probe beam and its spatial dimension incident on the sample. Quantitative agreement between the measured speckle contrast and an analytical model yields estimates for the transverse and longitudinal coherence lengths of the source. We also demonstrate that the coherence can be contro

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Akeju, Oluwaseun, M. Brandon Westover, Kara J. Pavone, et al. "Effects of Sevoflurane and Propofol on Frontal Electroencephalogram Power and Coherence." Anesthesiology 121, no. 5 (2014): 990–98. http://dx.doi.org/10.1097/aln.0000000000000436.

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Abstract Background: The neural mechanisms of anesthetic vapors have not been studied in depth. However, modeling and experimental studies on the intravenous anesthetic propofol indicate that potentiation of γ-aminobutyric acid receptors leads to a state of thalamocortical synchrony, observed as coherent frontal alpha oscillations, associated with unconsciousness. Sevoflurane, an ether derivative, also potentiates γ-aminobutyric acid receptors. However, in humans, sevoflurane-induced coherent frontal alpha oscillations have not been well detailed. Methods: To study the electroencephalogram dyn

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Anczykowska, A., S. Bartkiewicz, and J. Mysliwiec. "Laser Coherence Meter Based on Nanostructured Liquid Crystals." International Journal of Optics 2013 (2013): 1–3. http://dx.doi.org/10.1155/2013/287506.

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We present the method for coherence length measurement using coherence meter based on hybrid liquid crystal structures doped with gold nanoparticles. The results indicate that the method is able to determine the coherence length of coherent light sources with precision of 0.01 m at wavelength range from 200 to 800 nm for wide range of initial beam powers starting from 1 mW. Given the increasing use of laser technology in industry, military, or medicine, our research may open up a possible route for the development of improved techniques of coherent diagnostic light sources.

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Ding, Qiming, and Quancheng Liu. "No-go theorems for deterministic purification and probabilistic enhancement of coherence." Journal of Physics A: Mathematical and Theoretical 55, no. 10 (2022): 105301. http://dx.doi.org/10.1088/1751-8121/ac4ecd.

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Abstract The manipulation of quantum coherence is one of the principal issues in the resource theory of coherence, with two critical topics being the purification and enhancement of coherence. Here, we present two no-go theorems for the deterministic purification of coherence and the probabilistic enhancement of coherence, respectively. Specifically, we prove that a quantum state cannot be deterministically purified if it can be expressed as a convex combination of an incoherent state and a coherent state. Besides, we give an easy-to-verified sufficient and necessary condition to determine whe

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Santarsiero, M., R. Martínez-Herrero, D. Maluenda, J. C. G. de Sande, G. Piquero, and F. Gori. "Partially coherent sources with circular coherence." Optics Letters 42, no. 8 (2017): 1512. http://dx.doi.org/10.1364/ol.42.001512.

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Piquero, G., M. Santarsiero, R. Martínez-Herrero, J. C. G. de Sande, M. Alonzo, and F. Gori. "Partially coherent sources with radial coherence." Optics Letters 43, no. 10 (2018): 2376. http://dx.doi.org/10.1364/ol.43.002376.

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