Coronavirus Disease-19 associated arthritis – An observational study by Debanjali Sinha, Sumantro Mondal, Alakendu Ghosh

“…Various rheumatological manifestations have been reported during or after COVID-19 infection, but data are scarce. In this observational study, we have tried to analyze the clinical characteristics of COVID-19 associated arthralgia/arthritis. …”
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Acute electrocardiographic changes during smoking: an observational study by Balram Bhargava, Sandeep Singh, Ambuj Roy, Sivasubramanian Ramakrishnan, Nitish Naik, Kinjal Bhatt, Akhilesh K Dubey, Sandeep Seth

“…Objective To study the temporal relationship of smoking with electrophysiological changes.Design Prospective observational study.Setting Tertiary cardiac center.Participants Male smokers with atypical chest pain were screened with a treadmill exercise test (TMT). …”
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General Solution and Observability of Singular Differential Systems with Delay by Jiang Wei

“…A general description for the solutions of singular differential systems with delay is given and a necessary and sufficient condition for exact observability of singular differential systems with delay is derived.…”
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Observing the Craft of Mentoring Students During the Year Abroad by Lesley Harbon

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Observations of Anomalous Microwave Emission from HII Regions by Clive Dickinson

“…I give a summary of the observations of Anomalous Microwave Emission (AME) from HII regions. …”
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Observability and uniqueness theorem for a coupled hyperbolic system by Boris V. Kapitonov, Joel S. Souza

Subjects: “…Observability…”
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Observations of Loki Patera by Juno during Close Flybys by Alessandro Mura, Rosaly M. C. Lopes, Federico Tosi, Francesca Zambon, Roberto Sordini, Peter J. Mouginis-Mark, Julie Rathbun, Scott Bolton, Jani Radebaugh, Alberto Adriani, Andrea Cicchetti, Davide Grassi, Melissa Mirino, Raffaella Noschese, Giuseppe Piccioni, Christina Plainaki, Giuseppe Sindoni

“…We also observed many small (∼3 km wide), closely spaced (∼10 km apart) islands that have persisted in the same locations for at least 45 years, since first being imaged by Voyager 1. …”
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Can We Observe the Gravitational Quantum States of Positronium? by P. Crivelli, V. V. Nesvizhevsky, A. Yu. Voronin

“…We consider the feasibility of observing the gravitational quantum states of positronium. …”
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A Note on the Observability of Temporal Boolean Control Network by Wenping Shi, Bo Wu, Jing Han

“…This paper investigates the observability problem of temporal Boolean control networks. …”
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Comparing Two Observational Systems in the Assessment of Knee Pain by Shannon Fuchs-Lacelle, Thomas Hadjistavropoulos, Donald Sharpe, Jaime Williams, Ronald Martin, Diane LaChapelle

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Observations on the Feeding Habits of Robber Flies. Part I. by S. W. Bromley

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Particle approximations of Wigner distributions for n arbitrary observables by Ralph Sabbagh, Olga Movilla Miangolarra, Hamid Hezari, Tryphon T. Georgiou

“…It is shown that the Wigner distribution associated with these observables can be rigorously approximated by such measures. …”
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Towards Quantifying the Uncertainty in Estimating Observed Scaling Rates by Haider Ali, Hayley J. Fowler, David Pritchard, Geert Lenderink, Stephen Blenkinsop, Elizabeth Lewis

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Observations on Breeding Behavior of Pachydiplax Longfpennis (Odonata:Libellulidae) by Carol Walser Robey

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In-situ observations of the magnetothermodynamic evolution of electron-only reconnection by D. S. Payne, M. Swisdak, J. P. Eastwood, J. F. Drake, P. S. Pyakurel, J. R. Shuster

“…We investigate the temporal dynamics of field-particle energy exchange during magnetic reconnection, using Magnetospheric Multiscale mission observations of an electron-only reconnection event in the magnetosheath. …”
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The Potential for Observing African Weather with GNSS Remote Sensing by Olalekan A. Isioye, Ludwig Combrinck, Joel O. Botai, Cilence Munghemezulu

“…The benefit of using spaced based GNSS radio occultation (RO) data for atmospheric sounding is highlighted and filling of geographical gaps from the station-based observation network with GNSS RO is also proposed.…”
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Microscopic Observation of Proliferative Membranes in Fibrocontractive Retinal Disorders by Rino Frisina, Francesco Tessarolo, Ivan Marchesoni, Federico Piccoli, Emiliana Bonomi, Patrizio Caciagli, Edoardo Midena, Giandomenico Nollo

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Insights into the identification of antimicrobial peptides: A multidisciplinary observation by Sizhe Chen, Qi Su

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Observation of anomalously large Nernst effects in conducting polymers by Yingqiao Ma, Xinglong Ren, Ye Zou, Wenrui Zhao, Dongyang Wang, Zhen Ji, Juncheng Fan, Chaoyi Yan, Lanyi Xiang, Gaoyang Ge, Xiaojuan Dai, Fengjiao Zhang, Ting Lei, Henning Sirringhaus, Chong-an Di, Daoben Zhu

“…Here, we challenge this notion by observing an anomalously large Nernst effect in a range of conducting polymers. …”
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Heterotopic Gastric Mucosa in Cervical Oesophagus: Clinical Observations by A. I. Dolgushina, A. O. Khikhlova, E. R. Olevskya, O. V. Naumenko, S. Yu. Belousov

“…Description of the endoscopic and clinical traits of heterotopic gastric mucosa (HGM) observed in cervical oesophagus.Key points. HGM in proximal oesophagus can be asymptomatic or have various clinical manifestations. …”
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