منابع مشابه
Bow-arrow interaction in archery.
A mathematical model of the flight of the arrow during its discharge from a bow was proposed by Pekalski (1990). His description of the model was incomplete. In this paper, I give a full description of the model. Furthermore, I propose some improvements that make his model more consistent with reality. One achievement is the modelling of contact of the arrow and grip; the pressure button is mod...
متن کاملMathematical and Computer Model of Sport Archery Bow and Arrow Interaction
The aim of the research was to summarize a mathematical model of bow and arrow interaction in the vertical plane and to develop an appropriated computer model. A bow was modeled as a non-deformed riser and hinged to it two nondeformed limbs with Archimedean springs. Their stiffness as well, as an elasticity of a string was taken into account in a linear approach. An asymmetric bow scheme was co...
متن کاملThe diversity of North American projectile-point types, before and after the bow and arrow
0278-4165/$ see front matter 2008 Elsevier Inc. A doi:10.1016/j.jaa.2008.12.002 * Corresponding author. Fax: +1 573 884 5450. E-mail address: [email protected] (R.L. Lyman Mimicking paleobiological studies of biodiversity, changes in the diversity of temporal types of North American projectile points are modeled to reveal evolutionary patterns of origination and extinction. Origination is mod...
متن کاملIntraoperative transthoracic echocardiography: another arrow to the bow of perioperative medicine.
507 Early outcome of liver transplantation performed with organs procured from brain death donors with transient or sustained cardio-circulatory collapse Valenza F., Villa A., Froio S., Coppola S., Barretta F., Melada E., Gatti S., Avalli L., Citerio G., Rossi G. E., Gattinoni L. 469 EDITORIALS Intraoperative transthoracic echocardiography: another arrow to the bow of perioperative medicine San...
متن کاملThe Thermodynamical Arrow and the Historical Arrow; Are They Equivalent?
In this paper, the relationship between the thermodynamic and historical arrows of time is studied. In the context of a simple combinatorial model, their definitions are made more precise and in particular strong versions (which are not compatible with time symmetric microscopic laws) and weak versions (which can be compatible with time symmetric microscopic laws) are given. This is part of a l...
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ژورنال
عنوان ژورنال: Journal of Range Management
سال: 1971
ISSN: 0022-409X
DOI: 10.2307/3896951