Driving a spacecraft around a planet isn’t anything like driving on a planet. A physicist explains orbital navigation.

Abstract: This paper presents an ultrawide-band (UWB) channel sounding scheme with a parametric channel estimation to seek accurate probing of the propagation channel. The channel sounder consists of ...

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Abstract: A novel algorithm is developed to estimate the two-dimensional direction-of-arrival (DOA) of the coherent sources based on a sparsely-distributed acoustic vector-sensor array. Only ...

Introduction Timely detection, notification and response are critical for mitigating outbreak impact, yet evidence linking timeliness to public health outcomes is limited.Methods We hypothesised that ...

Samantha (Sam) Silberstein, CFP®, CSLP®, EA, is an experienced financial consultant. She has a demonstrated history of working in both institutional and retail environments, from broker-dealers to ...

Japan Tobacco Inc. ( OTCPK:JAPAY) Q3 2025 Earnings Call October 30, 2025 4:00 AM EDT Thank you very much for joining the Investor Meeting for Q3 2025 results of Japan Tobacco Inc. today. It's time. So ...

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Discover more about the many different types of birds found around the world with Cam and Sophie the barn owl from One Zoo Three. What are reptiles? Discover the cold-blooded world of reptiles with ...