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Register a new userDeath and Maier: meteors and mortuary rites in the eastern Torres Strait (Eud kerker: na korep maierira asmer opged Torres Straitge)
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English: To the Meriam Mir people of Mer (Murray Island) in the eastern Torres Strait, bright meteors are an important element of death customs and beliefs. We draw from a combination of ethno-historic studies and interviews with Meriam elders to understand the role of bright meteors (Maier) in Torres Strait traditions relating to spiritual elements of death rites using a framework of symbolic anthropology. We find that bright meteors serve as symbolic representations of death and mortuary purification practices and show how the physical properties of meteors are incorporated in ritual, belief, spirituality, and custom. Meriam Mir: Meriamgize maier oditautlare nade eud onagri a mokakalam eud kerker. Kemerkemer daratkapda kikem kerkerira pardar, dorge a oka nako Torres Straitge eud tonar bud ueplare. Debe bibi maieride onatager eud ia onagri a nalu tonar able maierira seri/kakaper a dum able tonar umerem a simir akedrem.
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Song and dance are a traditional means of strengthening culture and passing knowledge to successive generations in the Torres Strait of northeastern Australia. Dances incorporate a range of apparatuses to enhance the performance, such as dance machines (Zamiyakal) and headdresses (Dhari). The dances, songs, headdresses and dance machines work together to transfer important knowledge about subsistence survival, social structure, and cultural continuity. This paper explores how celestial phenomena inspire and inform music and dance.
A major focus of the archaeoastronomical research conducted around the world focuses on understanding how ancient cultures observed sunrise and sunset points along the horizon, particularly at the solstices and equinoxes. Scholars argue that observations of these solar points are useful for developing calendars, informing ritual/ceremonial practices, and predicting seasonal change. This is the foundation of the Eurocentric four-season Julian (and later Gregorian) calendar. Famous examples include Stonehenge, Newgrange, Chichen Itza, and Chankillo. Studies at these and other sites tend to focus on solar point observations through alignments in stone arrangements, and the orientations of monuments. Despite the ongoing study of Indigenous Knowledge in Australia revealing a wealth of information about Aboriginal and Torres Strait Islander observations and interpretations of solar, lunar, and stellar properties and motions, very little has been published about the importance and use of solar point observations. The authors examine this topic through four case studies, based on methodological frameworks and approaches in ethnography, ethnohistory, archaeology, and statistics. Our findings show that Aboriginal and Torres Strait Islander people observe the solstices and other significant sunrise/sunset points along the horizon for timekeeping and indicating seasonal change - but in ways that are rather different to the four-season model developed in Western Europe.
Eirene Laskarina, empress of John III Batatzes of the exiled Byzantine Empire of Nicaea (1204--1261 CE), was an important Eastern Mediterranean figure in the first half of the thirteenth century. We reassess the date of Eirenes death, which has been variously dated between late 1239 and 1241, with the understanding that narrowing the range in which this event occurred contributes much to understanding the political situation in the area around 1240. George Akropolites, a famous official of the Empire, gives an account that connects Eirenes death to a comet that appeared six months earlier, thus pointing to two comet candidates that were visible from the Eastern Mediterranean between 1239 and 1241, one recorded on 3 June 1239 and the other on 31 January 1240. Recent historians prefer the former, based on historical circumstances and without a critical assessment of the comet records. We revisit the historical records and reveal that the 3 June 1239 candidate was not a comet. On the other hand, the other candidate, sighted on 31 January 1240, was a comet, as supported by multiple historical records in multiple regions, and is also a good fit with Akropolitess narrative. Therefore, we conclude that Eirene died six months after the comet that was seen on 31 January 1240, which places her death in the summer of 1240. Given that the date of her death is crucial for determining some other contemporary events across the Eastern Mediterranean, our results offer a solid basis for further research on the thirteenth-century Eastern Mediterranean.
In this paper, a baseline model termed as random birth-and-death network model (RBDN) is considered, in which at each time step, a new node is added into the network with probability p (0<p <1) connect it with m old nodes uniformly, or an existing node is deleted from the network with probability q=1-p. This model allows for fluctuations in size, which may reach many different disciplines in physics, ecology and economics. The purpose of this study is to develop the RBDN model and explore its basic statistical properties. For different p, we first discuss the network size of RBDN. And then combining the stochastic process rules (SPR) based Markov chain method and the probability generating function method, we provide the exact solutions of the degree distributions. Finally, the characteristics of the tail of the degree distributions are explored after simulation verification. Our results show that the tail of the degree distribution for RBDN exhibits a Poisson tail in the case of 0<p<=1/2 and an exponential tail as p approaches to 1.
The solar system is dusty, and would become dustier over time as asteroids collide and comets disintegrate, except that small debris particles in interplanetary space do not last long. They can be ejected from the solar system by Jupiter, thermally destroyed near the Sun, or physically disrupted by collisions. Also, some are swept by the Earth (and other planets), producing meteors. Here we develop a dynamical model for the solar system meteoroids and use it to explain meteor radar observations. We find that the Jupiter Family Comets (JFCs) are the main source of the prominent concentrations of meteors arriving to the Earth from the helion and antihelion directions. To match the radiant and orbit distributions, as measured by the Canadian Meteor Orbit Radar (CMOR) and Advanced Meteor Orbit Radar (AMOR), our model implies that comets, and JFCs in particular, must frequently disintegrate when reaching orbits with low perihelion distance. Also, the collisional lifetimes of millimeter particles may be longer (>10^5 yr at 1 AU) than postulated in the standard collisional models (10^4 yr at 1 AU), perhaps because these chondrule-sized meteoroids are stronger than thought before. Using observations of the Infrared Astronomical Satellite (IRAS) to calibrate the model, we find that the total cross section and mass of small meteoroids in the inner solar system are (1.7-3.5)x10^11 km^2 and 4x10^19 g, respectively, in a good agreement with previous studies. The mass input required to keep the Zodiacal Cloud (ZC) in a steady state is estimated to be 10^4-10^5 kg/s. The input is up to 10 times larger than found previously, mainly because particles released closer to the Sun have shorter collisional lifetimes, and need to be supplied at a faster rate.
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