Results 61 to 70 of about 3,196,627 (365)

Astrophysical Probes of the Constancy of the Velocity of Light [PDF]

, 1999
We discuss possible tests of the constancy of the velocity of light using distant astrophysical sources such as gamma-ray bursters (GRBs), Active Galactic Nuclei (AGNs) and pulsars.
Amelino-Camelia G., Colladay D., D. V. Nanopoulos, Ellis J., Ellis J., Ellis J., Ellis J., Ford L. H., Garay L., Hawking S., John Ellis, K. Farakos, Kaaret P., Kluzniak W., Lizzi F., Mavromatos N. E., N. E. Mavromatos, V. A. Mitsou, Yu H.   +18 more
core   +3 more sources

Prevalence of Amblyopia and Refractive Errors Among Primary School Children

Journal of Ophthalmic & Vision Research, 2015
Purpose: To determine the prevalence of amblyopia and refractive errors among 7 to 12-year-old primary school children in Tehran, Iran. Methods: This population-based cross-sectional study included 2,410 randomly selected students.
Z. Rajavi, Hamideh Sabbaghi, A. S. Baghini, M. Yaseri, H. Moein, Shadi Akbarian, Narges Behradfar, Simin Hosseini, H. Rabei, K. Sheibani   +9 more
semanticscholar   +1 more source

Biophysical characterization and ion transport with cell‐based and proteoliposome reconstitution assays of invertebrate K+‐Cl− cotransporters

FEBS Open Bio, EarlyView.
The K+‐Cl− cotransporters (KCCs) facilitate the symport of ions across the plasma membrane. They participate in physiological processes including neuronal regulation. Here, we characterized KCCs from Drosophila and Hydra vulgaris. Comparative analyses of transporters provide insights into the mechanism of KCC ion transport, regulation, and evolution ...
Satoshi Fudo, Marina Verkhovskaya, Coralie Di Scala, Claudio Rivera, Tommi Kajander   +4 more
wiley   +1 more source

Knowledge and Preference for Refractive Surgery and Preferred Methods of Refractive Correction among Patients with Significant Refractive Errors Attending Bharatpur Eye Hospital, Nepal

Journal of Nobel Medical College, 2020
Background: Refractive errors are a major cause of defective vision in all age groups. Although contact lens and refractive surgery are popular, still spectacles are the traditional and most widely used method of optical correction. The main objective of
Puspa Giri, Gopal Bhandari, Ranjeet Sah
doaj   +1 more source

Prevalence of Refractive Error and Associated Risk Factors in School-Age Children in Nepal: A Cross-sectional Study

Journal of Lumbini Medical College, 2021
Introduction: The most common visual disorder in school age children is refractive error globally. The present study aimed to know the prevalence of refractive errors and explore the factors associated with the refractive error in school-age children in ...
Keshav Raj Bhandari, Deepak Bahadur Pachhai, Chet Raj Pant, Ashish Jamarkattel   +3 more
doaj   +1 more source

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam, Anthony Siming Chen, Guido Herrmann   +2 more
wiley   +1 more source

Prevalence and associated factors of uncorrected refractive errors among school children in suburban areas in Bandung, Indonesia

Cogent Medicine, 2020
Refractive errors lead to visual impairment if they are uncorrected. The prevalence of uncorrected refractive errors in children is considerably high, even though they can be easily corrected with spectacles.
Aldiana Halim, Ratika Suganda, Susanti Natalya Sirait, Feti Karfiati Memed, Syumarti, Mayang Rini, Nina Ratnaningsih   +6 more
doaj   +1 more source

Long-Term Scintillation Studies of Pulsars: III. Testing Theoretical Models of Refractive Scintillation [PDF]

, 1998
Refractive interstellar scintillation (RISS) is thought to be the cause behind a variety of phenomena seen at radio wavelengths in pulsars and compact radio sources.
Bhat, N. D. Ramesh, Gupta, Yashwant, Rao, A. Pramesh   +2 more
core   +2 more sources

A clinic-based study of refractive errors, strabismus, and amblyopia in pediatric age-group

Journal of Family and Community Medicine, 2015
Purpose: The purpose of this cross-sectional observational study was to determine the distribution and patterns of refractive errors, strabismus, and amblyopia in children seen at a pediatric eye care.
Elham R. Al-Tamimi, A. Shakeel, Sanaa A. Yassin, S. Ali, U. A. Khan   +4 more
semanticscholar   +1 more source

Neural Network Adaptive Control With Long Short‐Term Memory

International Journal of Adaptive Control and Signal Processing, EarlyView.
ABSTRACT In this study, we propose a novel adaptive control architecture that provides dramatically better transient response performance compared to conventional adaptive control methods. This is accomplished by the synergistic employment of a traditional adaptive neural network (ANN) controller and a long short‐term memory (LSTM) network.
Emirhan Inanc, Abdullah Habboush, Yigit Gurses, Yildiray Yildiz, Anuradha M. Annaswamy   +4 more
wiley   +1 more source