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200 papers

Emissions of particulate matter into the atmosphere are essential to characterize, in terms of properties such as particle size, morphology, and composition, to better understand impacts on public health and the climate. However, there is…

Instrumentation and Detectors · Physics 2023-01-18 Nathaniel R. Bristow , Nikolas Pardoe , Jiarong Hong

Gas-phase molecules are a promising platform through which to elucidate the mechanisms of action and scope of polaritons for optical control of chemistry. Polaritons arise from the strong coupling of a dipole-allowed molecular transition…

Chemical Physics · Physics 2024-08-20 Jane C. Nelson , Marissa L. Weichman

ixpeobssim is a simulation and analysis framework, based on the Python programming language and the associated scientific ecosystem, specifically developed for the Imaging X-ray Polarimetry Explorer (IXPE). Given a source model and the…

Instrumentation and Methods for Astrophysics · Physics 2022-09-23 L. Baldini , N. Bucciantini , N. Di Lalla , S. R. Ehlert , A. Manfreda , M. Negro , N. Omodei , M. Pesce-Rollins , C. Sgrò , S. Silvestri

Application of cubesats in astronomical observations has been getting more and more mature in recent years. Here we report a concept study of a small Compton polarimeter to fly on a cubesat for observing polarization of soft gamma-rays from…

Instrumentation and Methods for Astrophysics · Physics 2019-11-18 Yi-Chi Chang , Chien-Ying Yang , Hung-Hsiang Liang , Che-Yen Chu , Jeng-Lun Chiu , Chih-Hsun Lin , Philippe Laurent , Hsiang-Kuang Chang

Exciton polaritons are inherently tunable systems with adjustable potential landscape. In this work we show that exciton polariton condensates can be selectively localized in a fixed optically induced periodic lattice with uniform potential…

A simple, self-calibrating, rotating-waveplate polarimeter is largely insensitive to light intensity fluctuations and is shown to be useful for determining the Stokes parameters of light. This study shows how to minimize the in situ…

Optics · Physics 2021-11-16 Vitaly Wirthl , Cristian D. Panda , Paul W. Hess , Gerald Gabrielse

The RABBITT setup is theoretically studied for various combinations of XUV and IR field components polarization: 'linear+linear', `linear+circular' with crossed propagation directions, and `circular+circular' with parallel propagation…

Atomic Physics · Physics 2024-10-29 Maria M. Popova , Sergei N. Yudin , Alexei N. Grum-Grzhimailo , Elena V. Gryzlova

An extensive theoretical literature predicts that X-ray Polarimetry can directly determine relevant physical and geometrical parameters of astrophysical sources, and discriminate between models further than allowed by spectral and timing…

In this paper, we present a full design of a flying robot to investigate the state of power grid components and to perform the appropriate maintenance procedures according to each fail or defect that could be recognized. To realize this…

Robotics · Computer Science 2020-07-31 Abdullatif Baba

This paper studies the problem of controlling a multi-robot system to achieve a polygon formation in a self-organized manner. Different from the typical formation control strategies where robots are steered to satisfy the predefined control…

Robotics · Computer Science 2023-04-04 Qingkai Yang , Fan Xiao , Jingshuo Lyu , Bo Zhou , Hao Fang

We present planning challenges, methods and preliminary results for a new model-based paradigm for earth observing systems in adaptive remote sensing. Our heuristically guided constraint optimization planner produces coordinated plans for…

Robotics · Computer Science 2021-11-16 Rich Levinson , Sreeja Nag , Vinay Ravindra

The free electron laser (FEL), as a next-generation light source, is an attractive tool in scientific frontier research because of its advantages of full coherence, ultra-short pulse duration, and controllable polarization. Owing to the…

Instrumentation and Detectors · Physics 2017-10-25 Qingmin Zhang , Bangjie Deng , Yuanmiaoliang Chen , Bochao Liu , Shaofei Chen , Jinquan Fan , Lie Feng , Haixiao Deng , Bo Liu , Dong Wang

I developed a new pure-python pipeline to reduce photometric and polarimetric data: ASTROPOP. It has been designed and optimized to work fully automated with the IAGPOL polarimeter of Pico dos Dias observatory (OPD, Brazil) and can reduce…

Instrumentation and Methods for Astrophysics · Physics 2018-12-26 Julio Cesar Neves Campagnolo

X-ray polarimetry of solar flares is still a not well established field of observation of our star. Past polarimeters were not able to measure with a high significance the polarization in X-rays from solar flares. Moreover, they had no…

The launch of the Imaging X-ray Polarimetry Explorer (IXPE), the first space-based polarimeter since 1978, offers a two order of magnitude improvement to the measurement of X-ray polarisation than its predecessor OSO-8, offering…

High Energy Astrophysical Phenomena · Physics 2025-07-22 Melissa Ewing , Adam Ingram , John Rankin , Fabio Muleri

We describe the data reduction pipeline and control system for the RoboPol project. The RoboPol project is monitoring the optical $R$-band magnitude and linear polarization of a large sample of active galactic nuclei that is dominated by…

Perovskite photovoltaic technologies are approaching commercial deployment, yet single junction and tandem architectures both still have significant room to improve power conversion efficiency and stability. The ability to perform rapid…

The orbital angular momentum and the polarisation of light are physical quantities widely investigated for classical and quantum information processing. In this work we propose to take advantage of strong light-matter coupling,…

Mesoscale and Nanoscale Physics · Physics 2016-12-07 Feng Li , Emiliano Cancellieri , Giuseppe Buonaiuto , Maurice S. Skolnick , Dimitri N. Krizhanovskii , David M. Whittaker

This study introduces a shared-control approach for collision avoidance in a self-balancing riding ballbot, called PURE, marked by its dynamic stability, omnidirectional movement, and hands-free interface. Integrated with a sensor array and…

The control of pneumatically driven soft robots typically requires electronics. Microcontrollers are connected to power electronics that switch valves and pumps on and off. As a recent alternative, fluidic control methods have been…