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A new idea for a binary clock is presented. It displays the time using a triangular array of 15 bits. It is shown that such a geometric, triangular arrangement is only possible because our system of time divisions is based on a sexagesimal…

History and Overview · Mathematics 2010-06-09 Joerg Pretz

The Large Synoptic Survey Telescope is designed to provide an unprecedented optical imaging dataset that will support investigations of our Solar System, Galaxy and Universe, across half the sky and over ten years of repeated observation.…

Instrumentation and Methods for Astrophysics · Physics 2017-08-16 LSST Science Collaboration , Phil Marshall , Timo Anguita , Federica B. Bianco , Eric C. Bellm , Niel Brandt , Will Clarkson , Andy Connolly , Eric Gawiser , Zeljko Ivezic , Lynne Jones , Michelle Lochner , Michael B. Lund , Ashish Mahabal , David Nidever , Knut Olsen , Stephen Ridgway , Jason Rhodes , Ohad Shemmer , David Trilling , Kathy Vivas , Lucianne Walkowicz , Beth Willman , Peter Yoachim , Scott Anderson , Pierre Antilogus , Ruth Angus , Iair Arcavi , Humna Awan , Rahul Biswas , Keaton J. Bell , David Bennett , Chris Britt , Derek Buzasi , Dana I. Casetti-Dinescu , Laura Chomiuk , Chuck Claver , Kem Cook , James Davenport , Victor Debattista , Seth Digel , Zoheyr Doctor , R. E. Firth , Ryan Foley , Wen-fai Fong , Lluis Galbany , Mark Giampapa , John E. Gizis , Melissa L. Graham , Carl Grillmair , Phillipe Gris , Zoltan Haiman , Patrick Hartigan , Suzanne Hawley , Renee Hlozek , Saurabh W. Jha , C. Johns-Krull , Shashi Kanbur , Vassiliki Kalogera , Vinay Kashyap , Vishal Kasliwal , Richard Kessler , Alex Kim , Peter Kurczynski , Ofer Lahav , Michael C. Liu , Alex Malz , Raffaella Margutti , Tom Matheson , Jason D. McEwen , Peregrine McGehee , Soren Meibom , Josh Meyers , Dave Monet , Eric Neilsen , Jeffrey Newman , Matt O'Dowd , Hiranya V. Peiris , Matthew T. Penny , Christina Peters , Radoslaw Poleski , Kara Ponder , Gordon Richards , Jeonghee Rho , David Rubin , Samuel Schmidt , Robert L. Schuhmann , Avi Shporer , Colin Slater , Nathan Smith , Marcelles Soares-Santos , Keivan Stassun , Jay Strader , Michael Strauss , Rachel Street , Christopher Stubbs , Mark Sullivan , Paula Szkody , Virginia Trimble , Tony Tyson , Miguel de Val-Borro , Stefano Valenti , Robert Wagoner , W. Michael Wood-Vasey , Bevin Ashley Zauderer

The period of an undamped compound pendulum has been selected to maximize the instrument's response to microseisms, when functioning as a type of horizontal seismometer. When functioning as a tiltmeter, the instrument is also capable of…

Geophysics · Physics 2007-05-23 Randall D. Peters

Since 1990, the UN Programme on Space Applications leads the United Nations Basic Space Science Initiative by contributing to the international and regional development of astronomy and space science through annual UN/ESA/NASA/JAXA…

Instrumentation and Methods for Astrophysics · Physics 2011-03-01 H. J. Haubold , S. Gadimova

Large-scale plasma flows in the Sun's convection zone likely play a major role in solar dynamics on decadal timescales. In particular, quantifying meridional motions is a critical ingredient for understanding the solar cycle and the…

Solar and Stellar Astrophysics · Physics 2015-06-19 Shukur Kholikov , Alexander Serebryanskiy , Jason Jackiewicz

Hundreds of years ago, colonization happened. Today we are still living out the ripple effects of this history. How does this relate to science, informal science education, and institutions that promote science communication? What…

Computers and Society · Computer Science 2020-08-18 Annette S. Lee , Sally Brummel , Kaitlin Ehret , Sarah Komperud , Thaddeus LaCoursiere

This paper presents an overview of recent progress at the Sydney University Stellar Interferometer (SUSI). Development of the third-generation PAVO beam combiner has continued. The MUSCA beam combiner for high-precision differential…

A time scale is a procedure for accurately and continuously marking the passage of time. It is exemplified by Coordinated Universal Time (UTC), and provides the backbone for critical navigation tools such as the Global Positioning System…

Sedentary behavior poses a major public health risk, being strongly linked to obesity, cardiovascular disease, and other chronic conditions. Accurately estimating sitting time is therefore critical for monitoring and improving individual…

Machine Learning · Computer Science 2026-04-13 Olivia Zhang , Zhilin Zhang

Time-to-science is an important figure of merit for digital instrumentation serving the astronomical community. A digital signal processing (DSP) community is forming that uses shared hardware development, signal processing libraries, and…

The Sun's axisymmetric flows, differential rotation and meridional flow, govern the dynamics of the solar magnetic cycle and variety of methods are used to measure these flows, each with its own strengths and weaknesses. Flow measurements…

Solar and Stellar Astrophysics · Physics 2021-09-08 Sushant S. Mahajan , David H. Hathaway , Andrés Muñoz-Jaramillo , Petrus C. Martens

Indigenous Knowledge is important for Indigenous communities across the globe and for the advancement of our general scientific knowledge. In particular, Indigenous astronomical knowledge integrates many aspects of Indigenous Knowledge,…

This study evaluates the effectiveness of three-dimensional variational (3D-Var) data assimilation coupled with a Rapid Update Cycle (RUC) framework for improving short-range precipitation forecasts over the Indonesian Maritime Continent…

Improving irradiance forecasting is critical to further increase the share of solar in the energy mix. On a short time scale, fish-eye cameras on the ground are used to capture cloud displacements causing the local variability of the…

Computer Vision and Pattern Recognition · Computer Science 2022-10-26 Quentin Paletta , Joan Lasenby

This white paper submitted for 2020 Decadal Assessment of Plasma Science concerns the importance of multi-spacecraft missions to address fundamental questions concerning plasma turbulence. Plasma turbulence is ubiquitous in the universe,…

The cyclic model of the universe has an old history in India. It has held the preeminent position regarding the origins of the universe, and it is described in astronomical texts, Puranic encyclopaedias, and philosophical literature. Within…

History and Philosophy of Physics · Physics 2007-05-23 Subhash Kak

The Sun's net radiative output varies on timescales of minutes to gigayears. Direct measurements of the total solar irradiance (TSI) show changes in the spatially- and spectrally-integrated radiant energy on timescales as short as minutes…

Solar and Stellar Astrophysics · Physics 2016-07-04 Greg Kopp

The Sun has been observed through a telescope for four centuries. However, its study made a prodigious leap at the end of the nineteenth century with the appearance of photography and spectroscopy, then at the beginning of the following…

Instrumentation and Methods for Astrophysics · Physics 2026-01-27 Jean-Marie Malherbe

The Aryabhatta Research Institute of Observational Sciences (ARIES), a premier autonomous research institute under the Department of Science and Technology, Government of India has a legacy of about seven decades with contributions made in…

Instrumentation and Methods for Astrophysics · Physics 2022-10-26 Ram Sagar