1,485 research outputs found
On the Status of the Geodesic Principle in Newtonian and Relativistic Physics
No full textA theorem due to Bob Geroch and Pong Soo Jang ["Motion of a Body in General Relativity." Journal of Mathematical Physics 16(1), (1975)] provides a sense in which the geodesic principle has the status of a theorem in General Relativity (GR). I have recently shown that a similar theorem holds in the context of geometrized Newtonian gravitation (Newton-Cartan theory) [Weatherall, J. O. "The Motion of a Body in Newtonian Theories." Journal of Mathematical Physics 52(3), (2011)]. Here I compare the interpretations of these two theorems. I argue that despite some apparent differences between the theorems, the status of the geodesic principle in geometrized Newtonian gravitation is, mutatis mutandis, strikingly similar to the relativistic case
The Meskhidze-Weatherall theory in context
No full textWe situate a recent theory of non-relativistic torsionful gravity developed by Meskhidze and Weatherall (2023) within the context of the broader philosophical and physics literature; we also discuss the philosophical significance of that theory
The Meskhidze-Weatherall theory in context
No full textWe situate a recent theory of non-relativistic torsionful gravity developed by Meskhidze and Weatherall (2023) within the context of the broader philosophical and physics literature; we also discuss the philosophical significance of that theory
Optimal management of β thalassaemia intermedia
No full textOur understanding of the molecular and pathophysiological mechanisms underlying the disease process in patients with β thalassaemia intermedia (TI) has substantially increased over the past decade. The hallmark of disease process in patients with TI includes ineffective erythropoiesis, chronic haemolytic anaemia, and iron overload. There are a number of options currently available for managing patients with TI including splenectomy, transfusion therapy, iron chelation therapy, modulation of fetal haemoglobin production, and several other agents targeting specific clinical complications. Limited studies assessed the efficacy and safety of these modalities; hence, there are currently no clear guidelines for managing patients with TI. 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Portrait of Robin Weatherall, musician for the J. C. Williamson presentation of the Royal Shakespeare Company's production of A Midsummer night's dream [picture]
No full textHandwritten note on verso : Robiun Weatherall (trumpet/percussion); Part of the collection: J.C. Williamson collection of photographs.; Seasons in Australasia recorded in programs and ephemera held in J C Williamson collection, PROMPT Collection: 1973 commencing 5 June, Adelaide Festival Theatre, Adelaide ; 1973 commencing 12 June, Her Majesty's Theatre, Melbourne ; 1973 commencing 10 July, Elizabethan Theatre, Newtown, Sydney
The Drawbacks of Research Ethics Committees
No full textLewis examines three drawbacks of ethics committees: their approval
of research projects acquires an intrinsic value, investigators are given a
measure of release from moral responsibility, and bureaucratic insistence on
obtaining written consent for research can sometimes be distressing to the
subjects. He suggests that dispensing with written consent might be
appropriate in some cases. Weatherall further discusses the role of ethics
committees and agrees that they should not place demands on investigators
which could cause unnecessary stress for patients. (KIE abstract
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