Asteroid phase curves using sparse and dense photometry

2021 ◽  
Author(s):  
Emil Wilawer ◽  
Dagmara Oszkiewicz ◽  
Agnieszka Kryszczyńska ◽  
Anna Marciniak ◽  
Vasilij Shevchenko
Keyword(s):  
Selection Criteria ◽  
Traditional Approach ◽  
Astronomical Observatory ◽  
Phase Curve ◽  
Computation Method ◽  
Amplitude Correction ◽  
Phase Slope ◽  
Science Centre ◽  
National Science ◽  
Differential Photometry

<p align="justify">We present a phase-curve computation method capable of combining sparse survey data, like relative photometry with dense differential measurements. Combining those types of data allows to obtain phase-curves parameters for large number of asteroids for which using traditional approach would not be sufficient.</p> <p align="justify">Using traditional dense ground-based photometry collected at Astronomical Observatory Institute of Adam Mickiewicz University in Poznań alongside with absolute Gaia measurements we were able to perform more accurate lightcurve amplitude correction and then derive the phase-slope parameter β of the phase-curve separately for each opposition which met our selection criteria. We show preliminary results for 31 oppositions of 24 asteroids.</p> <p align="justify">In the future we plan to create a large photometric database containing sparse and dense photometry from various publicly available data sources (Gaia, ATLAS, K2, LSST, TESS, VISTA and others) which will include absolute, relative and differential photometry.</p> <p align="justify"><strong>Acknowledgments: </strong>This work has been supported by grant No. 2017/25/B/ST9/00740 from the National Science Centre, Poland.</p>

First archaeological investigations of barrows in the Bačka region and the question of the Eneolithic/Early Bronze Age barrows in Vojvodina

2020 ◽  
Vol 95 (2) ◽  
pp. 350-375
Author(s):  
Jovan Koledin ◽  
Urszula Bugaj ◽  
Paweł Jarosz ◽  
Mario Novak ◽  
Marcin M. Przybyła ◽  
...  
Keyword(s):  
Bronze Age ◽  
Early Bronze Age ◽  
Western Region ◽  
Radiocarbon Dates ◽  
Funeral Ritual ◽  
Science Centre ◽  
National Science ◽  
Steppe Communities ◽  
Burial Mounds ◽  
Two Stages

AbstractIn various prehistoric periods, the territory of Vojvodina became the target of the migration of steppe communities with eastern origins. The oldest of these movements are dated to the late Eneolithic and the beginning of the Early Bronze Age. There are at least two stages among them: I – dated to the end of the fourth millennium BC / beginning of the third millennium BC and II – dated from 3000 to 2600 BC and combined with the communities of the classical phase of the Yamnaya culture. The data documenting these processes have been relatively poor so far – in comparison with the neighboring regions of Bulgaria, Romania and Hungary. A big drawback was the small number of systematically excavated mounds, providing comprehensive data on the funeral ritual of steppe communities. This poor database has been slightly enriched as a result of the design of the National Science Centre (Cracow, Poland) entitled “Danubian route of the Yamnaya culture”. Its effect was to examine the first two barrows located on the territory of Bačka – the western region of Vojvodina. Currently, these burial mounds are the westernmost points on the map of the cemeteries of the Yamnaya culture complex. Radiocarbon dates obtained for new finds, as well as for archival materials, allow specifying two stages of use of cemeteries of Yamnaya culture: I – around 3000–2900 BC and II – around 2800–2600 BC. Among the finds from Banat, there were also few materials coming probably from the older period, corresponding to the classical phase of Baden – Coţofeni I–II. The enigmatic nature of these discoveries, however, does not allow to specify their dating as well as cultural dependencies.

scholarly journals Development of wireless vertical bar spinner combat robot

2020 ◽  
Vol 18 (2) ◽  
pp. 759
Author(s):  
Amirul Syafiq Sadun ◽  
Jamaludin Jalani ◽  
Suziana Ahmad ◽  
Amiera Saryati Sadun ◽  
Sumaiya Mashori
Keyword(s):  
High Power ◽  
Vertical Axis ◽  
Horizontal Axis ◽  
Robot Design ◽  
Performance Requirement ◽  
Science Centre ◽  
National Science ◽  
And Performance

Recently, combat robot competition has become one of the most famous engineering competitions among schools and universities. The robots are usually built with a destructive weapon, which can immobilize or disable opponent’s robot and win the match. Despite the variety of robot design and concept, the trend has shown that most of the local contestant tend to design a horizontal axis weapon type. In this project, a wireless vertical axis bar spinner combat robot is designed and developed for the 3rd Malaysia Combat Robot Competition which was held at National Science Centre (PSN) in 2017. The robot is controlled using radio control (RC) and powered by a highly discharge 22.2V Lithium Polymer (LiPo) chemical battery. Furthermore, related analysis has been conducted to meet the design and performance requirement of the competition. With the DC brush motor and thick metal bar rotating in vertical axis, the robot has proven to produce high power, torque and speed during the competition.

scholarly journals Photoelectric Observations of AD Leo: 1989-1994

1995 ◽  
Vol 151 ◽  
pp. 87-88
Author(s):  
R. Konstantinova-Antova ◽  
A.P. Antov
Keyword(s):  
Single Channel ◽  
Photon Counting ◽  
Astronomical Observatory ◽  
Program Package ◽  
Flare Star ◽  
The Other ◽  
Integration Time ◽  
Differential Photometry ◽  
Computer Controlled ◽  
Photoelectric Observations

An investigation of the activity of the flare star AD Leo was made using U-band patrol observations. 60 cm computer-controlled telescopes with identical single channel photon-counting photometers at the National Astronomical Observatory at Rozhen and at the Belogradchik Observatory were used. The integration time was 1 sec. Differential photometry was carried out, the AD Leo measurements were made relative to BD+20°2475. The data was reduced with the program package APR (Kirov et al. 1991).Two simultaneous observing runs were made. The results of the first have already been published (Antov etal. 1991). The other was part of the observational campaign in May, 1991 with the ROSAT satellite. In Bulgaria, the observations were carried out at Rozhen in the U-band and at Belogradchik in the B-band. Four flares were detected by both.

The Australian Science Centre Movement 1980–2000: Part 1—Questacon, the National Science and Technology Centre

2015 ◽  
Vol 26 (2) ◽  
pp. 122 ◽  
Author(s):  
Chris Bryant ◽  
Mike Gore ◽  
Sue Stocklmayer
Keyword(s):  
Driving Force ◽  
Science Communication ◽  
Public Attitudes ◽  
Science And Technology ◽  
Human Face ◽  
Hands On ◽  
Science Centre ◽  
National Science ◽  
National University ◽  
Australian Science

Part 1: Scholarly concerns over science communication and in particular public attitudes towards and engagement with science have continued for almost half a century, but the establishment of a ‘hands-on' science centre in Canberra in 1980 put practice ahead of theory and led to the building of Questacon—the National Science and Technology Centre in 1988. The driving force behind this development was Australian National University physicist Dr Mike Gore. Funding came from the Australian and Japanese Governments—the latter a bicentennial gift—and a team of ‘explainers' at the centre helped visitors to appreciate that this science centre was not a museum but a place where science had a human face.

scholarly journals Proekologiczne i prooszczędnościowe zachowania gospodarstw domowych jako konsumentów energii

Ekonomia ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 23-39
Author(s):  
Edyta Ropuszyńska-Surma ◽  
Magdalena Węglarz
Keyword(s):  
Renewable Energy ◽  
University Students ◽  
Energy Saving ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Saving Energy ◽  
Ecological Awareness ◽  
Science Centre ◽  
National Science ◽  
Saving Behavior

The pro-ecological and pro-saving behavior of households as energy consumersThe aim of the article is to indicate the changes related to households’ behavior linked to energy saving and pro-ecological activities. Therefore, the authors conducted acomparison analysis of the results of the nationwide Polish research about Polish ecological awareness and identified — as part of the Polish National Science Centre NCN project called “Modelling prosumers’ behavior on theenergy market” — pro-economical attitudes of households. The first part of this paper pre­sents the opinions of Poles about the possibilities of development of the different kinds of energy sources in Poland, taking into special consideration the development of renewable energy sources. In the second part of this paper the authors describe households’ behavior connected with saving energy. They analyzed pro-economical behavior such as: switching off lights in empty rooms, un­plugging phone chargers after use, using economical bulbs and unplugging devices that are not in use. The diversifying variables of behavior are: sex, age, income. The analysis of households’ behav­ior was supplemented with the analysis of pro-economical attitudes of Wroclaw university students.

scholarly journals Environment, Colonization, and the Baltic Crusader States. Terra Sacra I, and Ecologies of Crusading, Colonization, and Religious Conversion in the Medieval Baltic. Terra Sacra II

2021 ◽  
Vol 26 ◽  
pp. 412-420
Author(s):  
Anna Maleszka
Keyword(s):  
Religious Conversion ◽  
Science Centre ◽  
National Science ◽  
Crusader States ◽  
The Baltic

Environment, Colonization, and the Baltic Crusader States. Terra Sacra I, and Ecologies of Crusading, Colonization, and Religious Conversion in the Medieval Baltic. Terra Sacra II. Edited by Aleksander Pluskowski. Turnhout: Brepols Publishers n.v., 2019.   Author’s studies funded by the National Science Centre, Poland’s (NCN) PRELUDIUM grant no. 2016/23/N/HS3/00660.

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