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Gravitationally lensed quasars offer a unique opportunity to study cosmological and extragalactic phenomena, using reliable light curves of the lensed images. This requires accurate deblending of the quasar images, which is not trivial due…

天体物理仪器与方法 · 物理学 2025-04-24 Favio Neira , Frédéric Courbin , Frédéric Dux , Georgios Vernardos

Despite the recent progress in text-to-video generation, existing studies usually overlook the issue that only spatial contents but not temporal motions in synthesized videos are under the control of text. Towards such a challenge, this…

计算机视觉与模式识别 · 计算机科学 2023-12-06 Xi Chen , Zhiheng Liu , Mengting Chen , Yutong Feng , Yu Liu , Yujun Shen , Hengshuang Zhao

Kinematics is a core topic in early physics courses, yet students often struggle to interpret motion and its graphical representations. To tackle these difficulties, we developed MissionMotion, a physical-computational videogame where…

Einstein based his special theory of relativity on two postulates: (a) physical laws appear the same in all inertial frames, and (b) the speed of light in vacuum is an observer-independent constant. However, it is already known that the…

经典物理 · 物理学 2021-11-24 Vikramaditya Mondal

In order to describe natural phenomena, science develops sophisticated models that use mathematical and formal languages which seem, and often are, very far from common experience. When a phenomenon is not accessible to our senses, its…

物理教育 · 物理学 2016-01-08 Vera Montalbano

Contrast Sensitivity of the human visual system can be explained from certain low-level vision tasks (like retinal noise and optical blur removal), but not from others (like chromatic adaptation or pure reconstruction after simple…

计算机视觉与模式识别 · 计算机科学 2022-02-17 Jesus Malo

The Einstein-First project aims to change the paradigm of school science teaching through the introduction of modern Einsteinian concepts of space and time, gravity and quanta at an early age. These concepts are rarely taught to school…

物理教育 · 物理学 2017-10-11 Tejinder Kaur , David Blair , John Moschilla , Warren Stannard , Marjan Zadnik

The principles of the special theory of relativity are extremely simple. A knowledge of the Pythagorean theorem and an ability to perform the simplest algebraic operations are sufficient to be conversant with the kinematics of the special…

综合物理 · 物理学 2012-01-10 V. N. Matveev , O. V. Matvejev

We introduce latent intuitive physics, a transfer learning framework for physics simulation that can infer hidden properties of fluids from a single 3D video and simulate the observed fluid in novel scenes. Our key insight is to use latent…

人工智能 · 计算机科学 2024-08-06 Xiangming Zhu , Huayu Deng , Haochen Yuan , Yunbo Wang , Xiaokang Yang

Gravitational lenses are presently playing an important role in astrophysics. By means of these lenses the parameters of the deflector such as its mass, ellipticity, etc. and Hubble's constant can be determined. Using C, Xforms, Mesa and…

天体物理学 · 物理学 2014-06-13 Francisco Frutos-Alfaro

Visualization refers to our ability to create an image in our head based on the text we read or the words we hear. It is one of the many skills that makes reading comprehension possible. Convolutional Neural Networks (CNN) are an excellent…

计算机视觉与模式识别 · 计算机科学 2019-09-13 Ignazio Gallo , Shah Nawaz , Alessandro Calefati , Riccardo La Grassa , Nicola Landro

Cameras capable of capturing videos at a trillion frames per second allow to freeze light in motion, a very counterintuitive capability when related to our everyday experience in which light appears to travel instantaneously. By combining…

光学 · 物理学 2018-08-29 Daniele Faccio , Andreas Velten

The group-velocity of evanescent waves (in undersized waveguides, for instance) was theoretically predicted, and has been experimentally verified, to be Superluminal (v_g > c). By contrast, it is known that the precursor speed in vacuum…

综合物理 · 物理学 2009-10-31 A. Pablo , L. Barbero , Hugo E. Hernandez F. , Erasmo Recami

Within an axiomatic framework of kinematics, we prove that the existence of faster than light particles is logically independent of Einstein's special theory of relativity. Consequently, it is consistent with the kinematics of special…

综合物理 · 物理学 2015-03-20 Gergely Székely

Einstein's theory of relativity is largely thought of as one of the most important discoveries of the 20$^{th}$ century and continues to pass observational tests over 100 years later. Yet, it is Newtonian gravity, a 350 year old formalism…

物理教育 · 物理学 2023-11-03 Corey McInerney , Phil Sutton

A modern elementary introduction to special relativity for advanced school children or first-year university students, in Russian. I try to demonstrate that relativity does not contradict common sense; on the contrary, it follows from…

科普物理 · 物理学 2015-06-02 Andrey Grozin

Textbooks in applied mathematics often use graphs to explain the meaning of formulae, even though their benefit is still not fully explored. To test processes underlying this assumed multimedia effect we collected performance scores, eye…

物理教育 · 物理学 2017-06-14 M. Ogren , M. Nystrom , H. Jarodzka

The special theory of relativity teaches us that, although distinct inertial frames perceive the same dynamical laws, space and time intervals differ in value. We revisit the problem of time contraction using the paradigmatic model of a…

量子物理 · 物理学 2020-05-21 Matheus Fritsch Savi , Renato Moreira Angelo

This paper links the conjecture that the physical world is a virtual reality to the findings of modern physics. What is usually the subject of science fiction is here proposed as a scientific theory open to empirical evaluation. We know…

其他计算机科学 · 计算机科学 2010-11-16 B. Whitworth

Art history linked some early 20th Century avant-garde visual art movements to contemporary systems of ideas in mathematics and theoretical physics. One of the proposed connections is the one that might have existed between Cubism and…

物理学史与哲学 · 物理学 2007-05-31 José X. Martini