Literatura académica sobre el tema "Mounted archer"
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Artículos de revistas sobre el tema "Mounted archer"
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Hacker, Barton C. "Mounted Archery and Firearms". Vulcan 3, n.º 1 (29 de mayo de 2015): 42–65. http://dx.doi.org/10.1163/22134603-00301003.
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David Ayalon’s classic and highly influential 1956 study of Gunpowder and Firearms in the Mamluk Kingdom left some surprising questions unexamined. He attributed Ottoman victory primarily to Ottoman firearms, while Mamluks stubbornly clung to the arms of the mounted archer. But despite the technological underpinnings of his thesis, Ayalon discussed the technology of neither the traditional warfare of mounted archery nor the newfangled warfare of gunpowder weapons. Was Mamluk mounted archery actually inferior to Ottoman firearms? This essay addresses the technical basis both for the mounted archery central to Mamluk military prowess and the characteristics of late-fifteenth and early-sixteenth century firearms adopted by the Ottomans, both in the context of the social technology of Muslim military slavery. By opening the black box of Mamluk and Ottoman military technology, this essay seeks to show more precisely in what ways military technology did and did not shape the outcome of the struggle.
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Alofs, Eduard. "Studies on Mounted Warfare in Asia II: The Iranian Tradition – The Armoured Horse Archer in the Middle East, c. ce 550–1350". War in History 22, n.º 1 (16 de diciembre de 2014): 4–27. http://dx.doi.org/10.1177/0968344513518333.
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Alofs, Eduard. "Studies on Mounted Warfare in Asia I: Continuity and Change in Middle Eastern Warfare, c. ce 550–1350 – What Happened to the Horse Archer?" War in History 21, n.º 4 (noviembre de 2014): 423–44. http://dx.doi.org/10.1177/0968344513517664.
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Kruse, Marion. "Archery in the Preface to Procopius' Wars". Studies in Late Antiquity 1, n.º 4 (2017): 381–406. http://dx.doi.org/10.1525/sla.2017.1.4.381.
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Historians have long taken Procopius' description of heavily armored mounted archers in the opening of his Wars to be a more-or-less accurate depiction of contemporary military practice. This paper argues that Procopius employs archery as a metaphor for authorship by drawing on the techniques of figured writing (which include metaphor) as developed by the late antique rhetorical tradition in which he was trained. The comparison between Homeric and contemporary warriors at the opening of the Wars is therefore a figured way for Procopius to engage in a self-referential discussion concerning authorship and, in particular, to develop his agonistic relationship with his primary classical models, Herodotus and Thucydides. This conclusion requires a reevaluation of the military history of the sixth century.
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Lang, Wen Chang. "Design of a Dynamic Magnetic Field Steered Cathodic Arc Source in Arc Ion Plating". Advanced Materials Research 340 (septiembre de 2011): 167–72. http://dx.doi.org/10.4028/www.scientific.net/amr.340.167.
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In this work, a dynamic arched magnetic field steered arc source was deigned by virtue of Finite Element Method (FEM) calculation. The magnetic field was produced by two main electromagnetic coils so that the magnetic field can be adjusted with the help of the two currentI1and I2,whereI1is the current to the internal coil mounted coaxially in a magnetic yoke generating a static arched magnetic field to confine the cathode spots and I2is the current to the external coil mounted coaxially outside the above yoke adjusting the position of the vertex of arch. Base on the results of simulation, it was found this design enable the sweeping of the arc spots on the target surface by means of adjusting the ratio of current (I1/I2) , and cause the arc distribute evenly on the cathode surface in the diffuse arc mode transferred from the constricted arc mode. The effects of the target thickness and current ratio on the configuration and intensity of dynamic arched magnetic field were investigated. The optimized operating modes was proposed and discussed.
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SYVÄNNE, Ilkka. "The Reign of Bahrām V Gōr: The Revitalization of the Empire through Mounted Archery". Historia i Świat 4 (16 de septiembre de 2015): 71–102. http://dx.doi.org/10.34739/his.2015.04.05.
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The article reconstructs the military history of Persia under a Bahrām V Gōr, and points out the historical significance of his reign and campaigns as well as the importance of his military reforms – in particular the importance of the adoption of the new style of archery and cavalry tactics.
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Li, Chun Zhi, Yong Wen y Bin Liu. "FBG Sensor Technique for Dynamic Relative Displacements Measurement". Applied Mechanics and Materials 347-350 (agosto de 2013): 233–36. http://dx.doi.org/10.4028/www.scientific.net/amm.347-350.233.
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The technique of optical fiber grating with high tensile strength, small size, and light weight has been widely used for temperature and strain measurement. In this paper, a new flexible fiber Bragg grating sensing beam including its design, calibration, and application is presented for effectively measuring dynamic relative displacement inside the assembled joints in a shaking table test. The two FBG sensors are encapsulated in one flexible arched-beam slice, while FBG sensors are separately located in up-down position of one flexible slice. The arched-beam-based FBG sensor has been fabricated by employing a series of FBG sensors along with design of temperature compensation. Based on this design, the positive and negative strain will make the spectra broaden as the displacement increases, thus by converting strains to relative displacements is derived by calibration data. The relative displacement measured by FBG sensor under dynamic environment are available, subsequently, it can be concluded that the flexible arched-beam-based FBG is capable of measuring dynamic relative displacements with good accuracy mounted in the narrow space of a complex structure.
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Siéssere, Selma, Mathias Vitti, Luiz Gustavo de Sousa, Marisa Semprini y Simone Cecílio Hallak Regalo. "Educational material of dental anatomy applied to study the morphology of permanent teeth". Brazilian Dental Journal 15, n.º 3 (diciembre de 2004): 238–47. http://dx.doi.org/10.1590/s0103-64402004000300014.
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The purpose of this report is to present educational material that would allow the dental student to learn to easily identify the morphologic characteristics of permanent teeth, and how they fit together (occlusion). In order to do this, macro models of permanent teeth with no attrition were carved in wax and later molded with alginate. These molds were filled with plaster, dental stone and/or cold-cured acrylic resin. The large individual dental stone tooth models were mounted on a wax base, thus obtaining maxillary and mandibular arches which were occluded. These dental arches were molded with plaster or dental stone. The authors suggest that these types of macro models allow an excellent visualization of the morphologic characteristics of permanent teeth and occlusion. Dental students are able to carve the permanent dentition in wax with great facility when they can observe macro models.
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Li, Yue, Chengrui Zhang, William Timothy Treal Taylor, Liang Chen, Rowan K. Flad, Nicole Boivin, Huan Liu et al. "Early evidence for mounted horseback riding in northwest China". Proceedings of the National Academy of Sciences 117, n.º 47 (2 de noviembre de 2020): 29569–76. http://dx.doi.org/10.1073/pnas.2004360117.
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Horseback riding was a transformative force in the ancient world, prompting radical shifts in human mobility, warfare, trade, and interaction. In China, domestic horses laid the foundation for trade, communication, and state infrastructure along the ancient Silk Road, while also stimulating key military, social, and political changes in Chinese society. Nonetheless, the emergence and adoption of mounted horseback riding in China is still poorly understood, particularly due to a lack of direct archaeological data. Here we present a detailed osteological study of eight horse skeletons dated to ca. 350 BCE from the sites of Shirenzigou and Xigou in Xinjiang, northwest China, prior to the formalization of Silk Road trade across this key region. Our analyses reveal characteristic osteological changes associated with equestrian practices on all specimens. Alongside other relevant archaeological evidence, these data provide direct evidence for mounted horseback riding, horse equipment, and mounted archery in northwest China by the late first millennium BCE. Most importantly, our results suggest that this region may have played a crucial role in the spread of equestrian technologies from the Eurasian interior to the settled civilizations of early China, where horses facilitated the rise of the first united Chinese empires and the emergence of transcontinental trade networks.
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Kleymenov, Alexander A. y Sergey S. Ivanov. "“WITH ME WILL BE THE SCYTHIANS...”: CENTRAL ASIAN MOUNTED ARCHERS IN ALEXANDER THE GREAT’S ARMY". Journal of historical philological and cultural studies 1, n.º 59 (30 de marzo de 2018): 123–45. http://dx.doi.org/10.18503/1992-0431-2018-1-59-123-145.
Texto completoTesis sobre el tema "Mounted archer"
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Simonetta, Clio. "Le cheval de guerre au Japon, de son introduction au Xᵉsiècle". Electronic Thesis or Diss., Université Paris sciences et lettres, 2024. http://www.theses.fr/2024UPSLP028.
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Le but de ce projet est d'étudier en détail le rôle du cheval dans le système militaire du Japon ancien, du point de vue logistique et tactique. Cet animal, qui n'est pas originaire de l'archipel, fut importé de Corée pendant la période protohistorique et devint par la suite un élément central de l'art de la guerre, aussi bien que de la construction identitaire de la culture guerrière. Si l'historiographie s'est penchée depuis longtemps sur l'évolution des archers montés et de leur classe sociale, le cheval lui-même et la complexité de son rôle dans la sphère militaire n'ont pas reçu autant d'attention. Notre sujet concerne tout d'abord les aspects qualitatifs et biologiques de l'animal (son origine, son éthologie, sa physiologie, etc.), et analyse ensuite les mécanismes historiques ayant porté à sa diffusion à travers l'Asie, son adoption dans les îles japonaises, et l'élaboration d'une culture équestre militaire propre au Japon. La période examinée couvre la période d'acquisition de l'élevage, jusqu'au Xᵉ siècle, et vise à remettre dans son contexte la diffusion de la culture équestre et en étudier les liens éventuels avec l'évolution sociale, politique et militaire de la société dans son ensemble. Cette recherche se base sur une approche scientifique, qui met en évidence les données sur l'histoire zoologique de l'animal et ses caractéristiques biologiques, afin de mieux interpréter les données archéologiques et historiques. Dans notre analyse, on tiendra compte des différents emplois du cheval militaire au sein du Département des Affaires Militaires de la Cour impériale : cheval de bât, cheval du réseau des Postes, chargeur de guerre. On va rechercher les conséquences logistiques de ces types d'emplois (ravitaillements, soins, déplacement, etc.), aussi bien que leurs effets sur le contexte économique, social et militaire. Pour cela, nous nous sommes basés principalement sur les données archéologiques disponibles, aussi bien qu'un vaste corpus de sources anciennes, dont les annales, les textes administratifs, les règlements émis par la Cour impériale, etc. L'étude du cheval de guerre nous permettra ainsi une meilleure compréhension du phénomène guerre au Japon, ce qui pourra éclairer plusieurs aspects des conflits sociaux et de la gestion de l'autorité au JaponThe purpose of this project is to study in detail the role of the horse in the military system ofancient Japan, from a logistical and tactical point of view. This animal, which is not native to the archipelago, was imported from Korea during the proto-historic period and subsequently became a central element of the art of war, as well as of the identity construction in warrior culture. While historical research has long focused on the evolution of mounted archers and of their social class, the horse itself and the complexity of its role in the military sphere has not received as much attention. Our subject concerns first of all the qualitative and biological aspects of the animal (its origin, its ethology, its physiology, etc.), and then analyzes the historical mechanisms having led to its diffusion through Asia, its adoption in the Japanese Islands, and the development of a military equestrian culture specific to Japan. The period examined covers the first adoption of horse rearing, up to the 10th century. We aim to place the diffusion of equestrian culture in its proper historical context and to study its possible links with the social, political and military evolution of the society as a whole.This research is based on a scientific approach, which highlights the data on the zoologicalhistory of the animal and its biological characteristics, in order to better interpret the archaeological and historical data. In our analysis, we will take into account the different uses of the military horse within the Department of Military Affairs of the Imperial Court: pack horse, postal network horse, warhorse. We will research the logistical consequences of these types of functions (supply, care, travel, etc.), as well as their effects on the economic, social and military context. For this, we relied mainly on available archaeological data, as well as a vast corpus of ancient sources, including annals, administrative texts, regulations issued by the Imperial Court, etc. The study of the warhorse will thus allow us a better understanding of the war phenomenon in Japan, which may shed light on several aspects of social conflicts and the use of power in Japan
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Berthon, William. "Bioarchaeological analysis of the mounted archers from the Hungarian Conquest period (10th century) : Horse riding and activity-related skeletal changes". Thesis, Paris Sciences et Lettres (ComUE), 2019. http://www.theses.fr/2019PSLEP061.
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Certaines modifications observées sur les os humains peuvent permettre de reconstituer les activités des populations anciennes. L'équitation représente notamment un intérêt particulier, ayant apporté des changements profonds et durables dans l'histoire de l'évolution culturelle humaine. Cependant, divers facteurs de biais et l'absence de données contextuelles claires liées aux restes osseux donnent souvent lieu à des interprétations limitées ou peu fiables des modifications osseuses en termes d’activités spécifiques. Les sources archéologiques et historiques attestent que des tribus de populations semi-nomades ont conquis le bassin des Carpates à l’aide d’armées de cavaliers-archers au tournant des 9ème et 10ème siècles, conduisant ainsi à la fondation du Royaume de Hongrie en l'an 1000/1001. Les cimetières de cette période fournissent des cas de dépôts de matériel lié à l’archerie et à l’équitation ainsi que des ossements de chevaux associés aux individus dans les tombes. Ces populations sont ainsi parmi les plus pertinentes pour mener des études méthodologiques sur les modifications osseuses liées aux activités, et notamment à la pratique cavalière. Nous avons sélectionné 67 individus issus du cimetière hongrois de Sárrétudvari-Hízóföld (10ème siècle), pour les analyser selon la présence ou l'absence de dépôt lié au cheval dans leurs tombes. Un échantillon moderne de comparaison de 47 individus présumés non-cavaliers a également été sélectionné au sein de la collection documentée de Lisbonne. Seuls les sujets adultes masculins ont été inclus afin de limiter l'influence de variations en lien avec le sexe et l'âge. Les objectifs étaient d’identifier des modifications squelettiques liées à la pratique cavalière et d’améliorer nos connaissances sur les populations de la Conquête hongroise. Nous avons analysé diverses modifications osseuses, au niveau des enthèses (points d'attache des muscles), articulations et vertèbres, ainsi que des variations morphologiques et lésions traumatiques. Des mesures des os des membres inférieurs ont aussi servi à calculer des indices de forme et de robustesse. Les analyses statistiques ont principalement révélé des différences significatives entre les groupes hongrois avec ou sans mobilier et le groupe de comparaison. Celles-ci concernent notamment les modifications de certaines enthèses de l’os coxal, du fémur, du tibia et du calcanéus, une adaptation morphologique sur le col du fémur, les hernies discales à la jonction thoraco-lombaire, ou encore l'ovalisation de l’acétabulum de l'os coxal. Ces traits peuvent tous être liés à la posture du cavalier et semblent donc être des indicateurs prometteurs pour la pratique cavalière. Par ailleurs, les comparaisons ont montré que les individus hongrois sans dépôt dans leur tombe montaient aussi vraisemblablement à cheval. Parmi les limitations, appelant malgré tout à la prudence, figure la taille restreinte de nos échantillons archéologiques, qui est l’un des points qui devront être améliorés à l'avenir. En outre, certaines modifications osseuses, comme celles des enthèses, ont une étiologie multifactorielle, limitant ainsi leur interprétation. À cet égard, nous avons mené l’analyse exploratoire de la microarchitecture d'une enthèse, la tubérosité du radius. À l’aide d’acquisitions micro-CT et de reconstructions 3D des canaux de l'os cortical, nous avons observé que des variations microstructurales pourraient permettre, avec des recherches supplémentaires, de distinguer les modifications des enthèses liées aux activités de celles liées à d’autres facteurs, contribuant ainsi à de plus fiables reconstructions des activités des populations anciennes. Au final, le choix d'une collection anthropologique pertinente, avec des preuves directes de la pratique d'une activité, ainsi que l'application de critères méthodologiques stricts, sont autant d’éléments déterminants pour l'identification fiable de modifications squelettiques liées aux activitésSome changes observed on human bones can be related to activities practiced during life. Scholars have considered the reconstruction of activities from skeletal changes in past populations as “Bioarchaeology’s Holy Grail”. Horse riding, in particular, has interested bioarchaeologists and paleopathologists for several decades as it brought profound and lasting changes in the history of human cultural evolution. However, the existence of various confounding factors and the lack of clear contextual evidence in connection with the skeletal remains often result in limited or unreliable interpretations of skeletal changes in terms of specific activities. Archaeological and historical sources attest that tribes of semi-nomadic populations conquered the Carpathian Basin with powerful armies of mounted archers at the turn of the 9th and 10th centuries, which led to the foundation of the Kingdom of Hungary in the year 1000/1001. Cemeteries from that period often provide cases of deposits of archery and horse riding equipment as well as horse bones associated with the individuals in the graves. Those populations are, thus, among the most pertinent to be used to perform methodological investigations on activity-related skeletal changes, and, on horse riding, in particular. We selected a sample of 67 individuals from the 10th-century Hungarian cemetery of Sárrétudvari-Hízóföld, in order to analyze the individuals according to the presence or absence of riding deposit in their grave. A modern comparison group of 47 presumed non-rider individuals from the documented collection of Lisbon was also selected. Only adult males were included to limit the effect of sex and age on the changes. The main objectives were to identify skeletal changes reliably related to the practice of horse riding and to improve our understanding of the populations from the Hungarian Conquest period. Various types of skeletal changes were analyzed, including some entheseal changes (at muscles attachment sites), joint changes, vertebral changes, morphological variants, and traumatic lesions. Measurements of the lower limb bones were also used to calculate indices of shape and robusticity. Statistical analyses mostly revealed significant differences between the Hungarian groups with or without riding deposit and the comparison group from Lisbon. They concerned especially some entheseal changes at the coxal bone, femur, tibia, and calcaneus, a morphological adaptation on the femoral neck, intervertebral disc herniations at the thoracolumbar junction, or the ovalization of the acetabulum on the coxal bone. All these traits can be linked to the riding posture, and, thus, seem to be promising indicators for the practice of horse riding. On another note, comparisons between groups revealed that the Hungarian individuals without deposit in their grave were likely riding horses as well. Among the limitations calling for caution is the restricted size of our archaeological samples, which is one of the points that should be improved in the future. In addition, some skeletal changes, such as the entheseal changes, have a multifactorial etiology, which represents a limitation for their interpretation. In that regard, we performed the exploratory analysis of the microarchitecture of an enthesis, the radial tuberosity. Using micro-CT acquisitions and 3D reconstructions of the canals of the cortical bone, we observed that some microstructural variations could allow, with further research, distinguishing entheseal changes related to activity from those related to other factors, thus contributing to more reliable reconstructions of the activities in past populations. In the end, we emphasize that the selection of a pertinent anthropological collection, with direct evidence of the practice of an activity, and the application of strict methodological criteria, are determinant factors for the reliable identification of activity-related skeletal changes
Libros sobre el tema "Mounted archer"
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Mounted archery in the Americas. Place of publication not identified]: Long Riders' Guild Press, 2007.
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Torday, Laszlo. Mounted archers: The beginning of Central Asian history. Edinburgh: Durham Academic Press, 1997.
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Torday, Laszlo. Mounted Archers: The Beginnings of Central Asian History. Durham Academic Press, 1998.
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Karasulas, Antony. Mounted Archers of the Steppe 600 BC-AD 1300. Osprey Publishing, 2004.
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Agelarakis, Anagnostis P. Eastern Roman Mounted Archers and Extraordinary Medico-Surgical Interventions at Paliokastro in Thasos Island During the ProtoByzantine Period: The Historical and Medical History Records and the Archaeo-Anthropological Evidence. Archaeopress, 2020.
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Agelarakis, Anagnostis P. Eastern Roman Mounted Archers and Extraordinary Medico-Surgical Interventions at Paliokastro in Thasos Island During the ProtoByzantine Period: The Historical and Medical History Records and the Archaeo-Anthropological Evidence. Archaeopress, 2020.
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Noga-Banai, Galit. Introduction. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190874650.003.0001.
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For the stone shall cry out of the wall and the beam out of the timber shall answer it.—Habakkuk 2:11.AMONG THE PAGAN CITIES THAT WENT THROUGH “CONVERSION” TO Christianity in the fourth century, two were linked to Jerusalem by witness of stone and wood: Aelia Capitolina and Rome. The pagan identity of Aelia Capitolina—the Roman city founded by Hadrian in 135 CE on the ruins of Jerusalem—was exposed by the sanctuaries and statues of Roman deities erected in central places, notably, the Temple Mount. During the fourth century, however, the city was defined less and less by the presence of Jupiter’s temple and more and more by the absence of the Jewish Temple. This lack of a Jewish visual frame and physical medium was made more palpable by the looming constructions that now began to mark the sites of Christ’s Crucifixion and Resurrection. It was time to remember the Jewish past in order to construct a meaningful configuration of the New Jerusalem. But Rome itself had laid claim to Jerusalem’s Jewish past. It was home to the Temple spoils, transferred, or better, “translated” to the city by Titus in 71 CE. Whether they were kept in the city or later taken away, the Temple cult vessels were sculpted in stone, for all to see, on the Arch of Titus. Sometime in the fourth century, a relic of the True Cross was also translated from Jerusalem to Rome, turning Rome into the home of relics of both Old and New Jerusalem....
Capítulos de libros sobre el tema "Mounted archer"
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Wharton, Edith. "VI". En The Age of Innocence, editado por Stephen Orgel. Oxford University Press, 2009. http://dx.doi.org/10.1093/owc/9780199540013.003.0008.
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That evening, after Mr Jackson had taken himself away, and the ladies had retired to their chintz-curtained bedroom, Newland Archer mounted thoughtfully to his own study. A vigilant hand had, as usual, kept the fire alive and the lamp trimmed; and the room, with...
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"Historical references on the Roman army and the ProtoByzantine mounted archer/lancer". En Eastern Roman Mounted Archers and Extraordinary Medico-Surgical Interventions at Paliokastro in Thasos Island during the ProtoByzantine Period, 28–30. Archaeopress Publishing Ltd, 2020. http://dx.doi.org/10.2307/j.ctv1zckzg4.10.
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Wallace, Leslie V. "A Biographical Approach to the Study of the Mounted Archer Motif during the Han Dynasty". En Memory and Agency in Ancient China, 197–215. Cambridge University Press, 2018. http://dx.doi.org/10.1017/9781108560726.010.
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"Reflections on archery, and the type and capacity of bows and arrows used by the Roman mounted archer in battle versus these of the ‘barbarian’ enemies". En Eastern Roman Mounted Archers and Extraordinary Medico-Surgical Interventions at Paliokastro in Thasos Island during the ProtoByzantine Period, 30–32. Archaeopress Publishing Ltd, 2020. http://dx.doi.org/10.2307/j.ctv1zckzg4.11.
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"Mounted archers of Paliokastro". En Eastern Roman Mounted Archers and Extraordinary Medico-Surgical Interventions at Paliokastro in Thasos Island during the ProtoByzantine Period, 28. Archaeopress Publishing Ltd, 2020. http://dx.doi.org/10.2307/j.ctv1zckzg4.9.
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"The Scythians: Mounted Archers of the Steppes". En The Ossetes. I.B. Tauris, 2022. http://dx.doi.org/10.5040/9780755618484.ch-1.
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Prestwich, Michael. "The Armies of Edward III’s French War". En Plantagenet England 1225-1360, 1–79. Oxford University PressOxford, 2005. http://dx.doi.org/10.1093/oso/9780198228448.003.0022.
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Abstract Even at the outset of the Hundred Years War, English armies were formidable. The chronicler Jean le Bel commented that the English had no reputation at the start of Edward III’s reign for prowess or bravery, and that their armour and equipment were then completely out of date. By the late 1330s they had learned well, and were, the chronicler claimed, most noble and redoubtable warriors.1 The Scottish wars had seen important developments such as the appearance of mixed retinues of cavalry and archers. The advent of mounted archers enabled forces to move with impressive speed. Military tactics had been developed that had proved highly elective against the Scots at Dupplin Moor and Halidon Hill, and a cadre of experienced soldiers knew how to exercise command. Royal oYcials were practised in the vital tasks of recruiting men, and of organizing victualling and the shipping of supplies.
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Charney, Michael W. "Military Technology and Mughal Warfare in the South Asian Context". En The Oxford Handbook of the Mughal World, C4.S1—C4.N62. Oxford University Press, 2022. http://dx.doi.org/10.1093/oxfordhb/9780190222642.013.4.
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Abstract This chapter examines the entrance of the Mughal army onto the North Indian plains and the successful military expansion that built the subcontinent’s largest precolonial empire. This success was due to both the early Mughals’ adoption of firearms and their coordination of mounted archers. The ruler Akbar instituted a system that would provide men for the Mughal army without draining the resources of the Mughal state, but this changed the army’s composition so that it came to reflect more the India the Mughals ruled. The army grew in size, added elephants and a large court that moved with it, adopted increasingly larger artillery, and on the whole, slowed down. Over time, corruption and economic change impoverished the Mughal court and the aristocracy alike, and the army became increasingly a shadow of the powerful force it had once been. In the eighteenth century, Mughal armies would experience decisive defeats at the hands of other Indian armies and against the English East India Company.
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"II. Cornish Men-at-Arms and Mounted Archers who Served the King between c. 1298 and c. 1415". En Cornwall, Connectivity and Identity in the Fourteenth Century, 393–424. Boydell and Brewer, 2019. http://dx.doi.org/10.1515/9781787446984-025.
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Prebble, John y Bruce Weber. "Science for Humanity 1985-1992". En Wanderind in the Gardens of the Mind, 248–68. Oxford University PressNew York, NY, 2003. http://dx.doi.org/10.1093/oso/9780195142662.003.0012.
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Abstract Shortly after the foundation of Glynn, Mitchell had a brass plate fixed outside the front door with the inscription “Founded to Promote Fundanwntal Giological Rese>arch for the &>nefit of Humanity. “ ln the late 198! S a new panel was mounted in the entrance hall of Glynn. lt carried the heading, which he afterward referred to as the institute’s motto, “Science for Humanity. “ It expressed one of his major concerns of later life that the purpose of science is for the good of humanity. Mitchell explained: In that motto the word Humanity has two meanings. On the one Jund it means ht1111ankind, and on the other hand it refers to that special quality of sympathy and undE’fstanding that we associate with people’s love for OllE’ anothE’f and for other creatures with whom we share the natural world.
Actas de conferencias sobre el tema "Mounted archer"
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Valdovinos, Schaun, Chelene Wong, Don Helling y Ken Wilson. "Connecting a Region: Foothills Trail White River Bridge". En Footbridge 2022 (Madrid): Creating Experience. Madrid, Spain: Asociación Española de Ingeniería Estructural, 2022. http://dx.doi.org/10.24904/footbridge2022.065.
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<p>The White River Bridge will become a key link extending the regional Foothills Trail, which when complete will run more than 48-km through communities and scenic landscapes in the shadow of Mount Rainier. The three-span arch footbridge will become a destination where users can linger over the beautiful White River. It will also provide a much-needed secondary route for emergency vehicles.</p><p>The total bridge length of 174m is divided over three network arch spans. Network arches create a very transparent structure that is very stiff. The crisscrossing hanger pattern of the structure can carry heavy point loads from a fire truck without distressing members. Generous lookouts at the central pier will provide an area for users to linger and take in views of the river.</p><p>Key elements of the design included selection of the preferred geometry of the arch spans, optimization of the hanger pattern, fabrication and construction considerations, and seismic design approach using base isolation of the superstructure atop the supporting piers. The erection sequence of the large spans has been an up-front consideration with every effort to minimize disturbance to the wooded site. User experience and aesthetics are a focus of design, but with equal emphasis on economy and efficiency. This footbridge showcases how all these aspirations can be achieved with the right design approach.</p>
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Karadoller, B., C. İmren, B. Arıkan y İ. N. Özdoğru. "A Case Study for Archaeo-Geophysics: GPR Application on Hacımusalar Mound/Elmalı/Antalya". En NSG2023 29th European Meeting of Environmental and Engineering Geophysics. European Association of Geoscientists & Engineers, 2023. http://dx.doi.org/10.3997/2214-4609.202320149.
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Rostamy, Noorallah, David Sumner, Donald J. Bergstrom y James D. Bugg. "Effect of Aspect Ratio on the Flow Field Above the Free End of a Finite Circular Cylinder". En ASME 2014 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/pvp2014-28218.
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The flow above the free end of a surface-mounted finite-height circular cylinder was studied in a low-speed wind tunnel using particle image velocimetry (PIV). The cylinder was mounted vertically in the wind tunnel, normal to a ground plane. The approaching flow was in the x-direction and the cylinder axis was aligned in the z-direction. Velocity measurements were made above the free-end surface in several vertical (x-z) planes and several horizontal (x-y) planes, for finite circular cylinders of aspect ratios AR = 9, 7, 5 and 3, at a Reynolds number of Re = 4.2×104. The relative thickness of the boundary layer on the ground plane was δ/D = 1.7. In the vertical symmetry plane, the mean velocity measurements show the prominent separation from the circumferential leading edge, the mean recirculation zone above the free-end surface, the arch vortex inside the recirculation zone, and reattachment of the flow onto the free-end surface. Experimental evidence is found for a leading-edge separation bubble, a flow structure which has been reported in some numerical simulations in the literature. As AR decreases, the reattachment point and the centre of the arch vortex move downstream, the recirculation zone becomes thicker, and the centre of the arch vortex moves higher above the free end. Away from the symmetry plane, the recirculation zone becomes thinner, the arch vortex centre moves upstream and closer to the free-end surface, and the reattachment point moves upstream. In the horizontal planes, measurements made very close to the surface can approximate the mean surface streamline topology, revealing the pair of foci representing the termination points of the arch vortex, the prominent curved reattachment line, reverse flow beneath the mean recirculation zone, and the reattachment and separation saddle points on the free-end centerline.
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Shelton, J. C., T. G. Schneider, D. McKenna y S. L. Baliunas. "Results from the Cassegrain adaptive optics system of the Mount Wilson 100-inch telescope". En Adaptive Optics. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/adop.1996.amb.13.
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Since June of 1994 we have been operating and improving a natural-guide-star adaptive optics system on the Mount Wilson 100-inch telescope.1,3 The system is routinely operated by one person plus a telescope operator. First astronomical observations have achieved image profiles with a full-width-at-half-max (FWHM) of 0.068 arcsec, using a silicon CCD with no wavelength discrimination (Fig. 1).
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Воронков, И. А., И. В. Рукавишникова, Д. В. Бейлин y Н. Ф. Федосеев. "Studies of the mound of the fourth Kurgan group «Tsementnaya Slobodka 1” in the city of Kerch". En ДРЕВНОСТИ БОСПОРА. Международный ежегодник по истории, археологии, эпиграфике, нумизматике и филологии Боспора Киммерийского. Crossref, 2018. http://dx.doi.org/10.25681/iaras.2018.978-5-94375-251-3.171-189.
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The article is devoted to the research of the cemetery Cement Sloboda 1. The focus of the work is the mound 4 and the crypt of antique time, open under the embankment. In addition, 7 burials were investigated in the burial mound 4, of which 4 were inlets into the embankment, one cremation in the urn, one inlet in the ancient crypt and the remains of burial in the crypt, as well as two cremation pits, a trizny complex. The robbed antique crypt of the end of IV century. BC. had overlap with a concave arch. The crypt was disassembled in blocks and completely reconstructed in a new place in the museum.
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Ballo, Federico, Giampiero Mastinu, Giorgio Previati y Massimiliano Gobbi. "Numerical Modelling of the Biaxial Fatigue Test of Aluminium Wheels". En ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/detc2020-22142.
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Abstract The paper is devoted to the numerical simulation of fatigue life of lightweight aluminium wheels subject to biaxial fatigue test. A numerical model based on finite elements is developed for the scope. The model receives as input the test load sequences and outputs the fatigue life of wheel. Two different methods for modelling the load transfer mechanism of the tyre have been analysed, i.e. how the tyre-drum contact forces are transferred to the wheel rim. The first method consists of a simple cosine loading function acting on a fixed arch of the wheel rim. The second method relies on a physical model of the tyre that is fixed at the tyre-rim interface surface; the computed reaction forces are fed as input to the wheel model. The fatigue life of the wheel is estimated by using the Palmgrem-Miner approach. Both the Sines fatigue criterion and the Papadopoulos critical plane with gradient effect criterion are used and the results are compared. Experimental tests have been performed on an actual wheel mounted on the biaxial test bench for a preliminary validation of the method.
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Verbeuren, T. J., M. J. Van Diest y A. G. Herman. "CONTRACTIONS TO PLATELETS IN AORTAS OF CONTROL AND CHOLESTEROL-FED RABBITS". En XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643799.
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Atherosclerotic aortas obtained from cholesterol-fed rabbits show a decreased responsiveness to noradrenaline, an increased responsiveness to low concentrations of serotoninand an unaltered responsiveness to prostaglandins. In vitro contractions induced by aggregating platelets are largely due to serotonin liberated during the aggregation. The present study was designed to compare the contractile responses to aggregating platelets inaortas obtained from control and cholesterol-fed rabbits.Male New Zealand rabbits were fed either a control or a 0.3% cholesterol diet during 16 weeks. Macroscopic and microscopic examination of the luminal surface of the aortas obtained from these animals revealed a substantial amount of fatty streaks in the tissuesobtained from the cholesterol-fed rabbits. Segments of the aortic arch of the rabbits were then mounted in organ chambers for isometric tension recording.In both the control and the atherosclerotic aortas increasing concentrations of platelets evoked contractions; the contractions obtained with the lower concentrations of platelets were significantly greater in the atherosclerotic tissues. The maximal responses and the ED50-values were comparable in both groups of blood vessels. No significant differences were observed when platelets obtained from control or hypercholesterolemic rabbits were compared. In the control and the atherosclerotic aortas the thromboxane receptorantagonist BM13505 at 2 x 10-5M did not significantly affect the contractionsto platelets obtained from either control or cholesterol-fed rabbits. The serotonin receptor antagonist ketanserin at 5 x 10-8M nearly abolished the responses to platelets in bothgroups of aortas.These experiments illustrate that (1) thecontractions induced by rabbit platelets in control and atherosclerotic aortas are mediated by serotonin and (2) the responses to platelets, as those to serotonin, are augmented in the atherosclerotic preparations.
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Prieur, Kevin, Daniel Durox, Guillaume Vignat, Thierry Schuller y Sébastien Candel. "Flame and Spray Dynamics During the Light-Round Process in an Annular System Equipped With Multiple Swirl Spray Injectors". En ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-76840.
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The ignition process of an annular combustor can be divided in several steps that end with the light-round. This corresponds to the sequence from the ignition of the first injector to the merging of the two flame fronts spreading in the annular system. The present article focuses on this important step, where two arch-like flame branches propagate in the chamber. These two turbulent travelling flames, nearly perpendicular to the combustor backplane, successively ignite the injection units and finally collide head-on and merge. In the present study, light-round of spray flames fed by liquid n-heptane is investigated. A high-speed camera operating at a frame rate of 6000 Hz and equipped with a filter centered on CH* emission is positioned on the side of the annular combustor, at the chamber backplane level and records images of one half of the chamber annulus. Acoustic pressure fluctuations are recorded through waveguide microphones plugged on the chamber backplane and microphones flush mounted in the annular plenum. The behavior of one injector ignited by the passing flame front is examined. One finds that the swirling flame structure formed by each injection unit evolves in time and that the anchoring location changes just after the passage of the travelling flame and during a period of a few milliseconds. This behavior can eventually lead to a flashback of the flame in the injector with possible severe damages. This dynamical phenomenon is described in detail. The propagation of the arch-like flame branch is then investigated. Flame images are used to determine the direction and velocity of the flame front by making use of a PIV like processing. One may distinguish two regions for the flame propagation. One is near the backplane, moving in a purely azimuthal direction, while the other corresponds to the remaining flame motion in the azimuthal and axial directions due to the volumetric expansion of the burnt gases. Filtered light images give some indications on the complex flame structures and on the typical length scales characterizing the moving front. Information is also obtained on the dynamics of the spray by shining a continuous laser sheet passing through one injector central axis and recording the light scattered by the n-heptane spray of droplets. These images are used to determine the influence of the incoming flame front on the evaporating n-heptane liquid droplets. A major result is that the flame modifies the spray much before its leading point reaches the injector unit and that its passage through the spray drastically changes the local droplet concentration and thus the local mixture composition.
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Isaev, Anatoliy Andreevich, Rustem Shafagatovich Takhautdinov, Vladimir Ivanovich Malykhin, Almaz Amirzyanovich Sharifullin y Mekhrali Mirzaliogly Aliev. "A Set of Options for Stimulation of Wells". En SPE Annual Caspian Technical Conference. SPE, 2022. http://dx.doi.org/10.2118/212098-ms.
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Abstract The most effective well interventions employed by Shehsmaoil Management Company LLC (Republic of Tatarstan, Russia) are the following [1-4]: – hydraulic fracturing (HF), – forced gas extraction unit from a wellbore annulus. The article addresses the issues of increasing recoverable reserves of oil, oil recovery factor, speeding up development, improving the profitability of deposits and fields (with carbonate deposits) as a whole through the introduction of proppant fracturing technology (PHF), multistage fracturing in wells with horizontal endings, drilling a compact grid of wells with subsequent fracturing. It is indicated that optimization of PHF (transition to hybrid hydraulic fracturing) by combining low-viscosity and cross-linked fluids depending on the performance during test injections made it possible to stabilize product's water cut, increase well productivity in terms of oil and stabilize oil recovery reduction rate. All relevant operations are implemented by three functioning hydraulic fracturing fleets operated that uses the equipment mounted on all-terrain chassis. The paper reviews and summarizes the application results of various fracturing fluid systems: borate-crosslinked guar fluids, Bioxan modified natural polysaccharide, fluids based on fresh water or viscoelastic surfactants, guar-free low-viscosity and high-viscosity water-based polymer systems, synthetic gelling agent. All the described systems feature the required sand trapping properties, so it is the price of the systems that determines the best choice. The article considers a portable set of equipment for forced extraction of gas from the wellbore annulus and its subsequent pumping into the oil pipeline by means of gas extraction sets of the KOGS type. In the conditions of shallow fields with hard-to-recover reserves the Company specialists encounter the challenge of increasing the profitability of development. The main reserves of the fields under consideration are confined to carbonate targets, and the reserves of deposits of the Kizelovsky gorizont of the Tournaisian stage occupy a considerable place by their quantity. Development of this object is mainly complicated by the following factors: complex geological structure, viscous, heavy and resinous oil, low reservoir temperatures and pressures. For the reasons of low efficiency of classical development systems, systems of reservoir pressure increase, it is necessary to develop, test, introduce new methods of intensification, new elements of development - compaction of well grid, horizontal wells (HW) with the following multistage fracturing. The fields considered in the article are tectonically controlled by the Western slope of South Tatar arch and Eastern edge of Melekesskaya depression, territorially located in Tatarstan.
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Cuypers, Cedric, Tjorven Delabie, Jelle Lanting, Wim De Munter, Rhimas Van de Putte, Joren Malfroy y Lubna Hamid. "Design of a Low Micro Vibration High Precision CubeSat Reaction Wheel". En ESA 12th International Conference on Guidance Navigation and Control and 9th International Conference on Astrodynamics Tools and Techniques. ESA, 2023. http://dx.doi.org/10.5270/esa-gnc-icatt-2023-068.
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Missions involving payloads such as laser communications or astronomical objectives often have high pointing requirements. The lower budgets and small inertias of CubeSats and SmallSats increase the difficulty of achieving these pointing requirements for payloads mounted on such satellites. Reaction wheels are almost always employed as the actuators of choice for the fine pointing of satellites to achieve high precision pointing. Contradictory, they also belong to the instruments which limit the pointing accuracy that can be attained by the spacecraft, as they often represent one of the main sources of vibrations to the platform. This results in a delicate trade-off during the reaction wheel design. For example, reducing dimensions and mass of a reaction wheel while maintaining a similar momentum capacity can be obtained by increasing the operating speed of the wheel, but comes at the cost of increased exported vibrations and power consumption. Arcsec has been working on such a CubeSat reaction wheel, dubbed “Zyra”, in cooperation with the KU Leuven and ESA under the GSTP program. The product of this design effort is a 40x40x23mm reaction wheel of 160g, providing 27.5mNm momentum capacity. The project is now entering its qualification and testing phase. A number of strategies were integrated in the design to increase the precision of the wheel. On the control side, the wheel integrates its own drive electronics, the required sensors and a micro controller. This allows the wheel to function as a stand-alone device with custom control algorithms tuned to the reaction wheel behavior. The control loop continuously estimates the friction encountered in the bearings during operation. The estimated friction is then added to the torque demand from the ADCS, which allows the wheel to quickly respond to friction changes and restore the angular velocity in such an event. The ADCS controller itself does not need to take into account such effects, or motor dynamics, and simply passes a torque demand to the integrated reaction wheel controller. Such a control architecture ultimately results in lower torque fluctuations, lower response times to unpredictable friction changes and more stable control of the reaction wheel velocity. On the mechanical side, the reaction wheel construction allows to reduce the generation of micro vibrations and reduce the propagation to the platform. In order to achieve this, the required process to efficiently balance the rotor should already be considered during the design of the housing . The housing is therefore designed to allow for post-assembly (field-) balancing down to grade G0.4, as well as to preserve the balancing grade once it is obtained. The balancing process is performed by laser ablation, which ensures that the bearings are not overstressed or damaged during material removal. Access to the reaction wheel rotor in its fully assembled form is required for this process. However, a G0.4 balancing grade can easily be compromised by dirt or scratches on the rotor due to the small dimensions and weight of the wheel. It is therefore crucial that the rotor can be protected and closed off after the balancing process is completed. The rotor suspension is axially preloaded to avoid rattling and increase reproducibility. The preloading also increases the bearing lifetime since the rolling elements and bearing races remain in constant contact without overstressing the elements or producing excessive friction. The suspension design is a so called soft-preload suspension. It utilizes a preload screw to repeatably set the desired preload to the bearings independent of production tolerances, as well as a loaded spring to keep the actual preload within the desired limits over the entire operating temperature range. The use of a spring in combination with a sliding fit is chosen over a flexible mounting to preserve rigidity in the radial direction and avoid rotor modes at low frequencies. Rolling element bearings are known to generate higher order harmonics. Even 10th or higher engine orders can be observed, depending on the bearing type. When a rotor is used in a large speed range, these higher order harmonics might pass and excite rotor modes, increasing exported vibrations at these frequencies. For small rotors, there are some benefits to making them as one rigid unit with the shaft, web and rim all machined out of a single piece of metal. However, such monolithic metallic structures are characterized by high Q-factors, resulting in sharp amplifications of the resonance frequencies. When a higher order harmonic passes such a high quality resonance frequency, large amplifications of the exported micro vibrations at this location can be expected. A first step to minimize this Q-factor is the material choice. For example, a bronze rotor has higher internal friction than a steel one, and therefore exhibits lower Q-factors for a similar shape. To further reduce the Q-factor while keeping the advantages of a single piece rotor, a damping principle called “constrained layer damping” is employed in the construction of the rotor. This allows to significantly increase the damping ratio of the rotor structure, while leaving the locations of the resonance frequencies virtually untouched. During the design phase of the reaction wheel, the damping layer was tuned to the rotor shape and material and was tested on simplified monolithic steel rotors on a shaker table set-up. On these rotor dummies, a decrease in Q-factor for the first resonance frequency of 59.2% was observed with the application of a 0.3mm damping layer, while the shift in resonance frequency was negligible. This rotor construction provides a relatively low cost method to decrease the Q-factor of the rotor without lowering its resonance frequencies and maintaining the advantages of single piece rotor. The next step in the project is validating and quantifying the resulting exported micro vibrations during an extensive test- and qualification phase.
Informes sobre el tema "Mounted archer"
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Mueller, C., S. J. Piercey, M. G. Babechuk y D. Copeland. Stratigraphy and lithogeochemistry of rocks from the Nugget Pond Deposit area, Baie Verte Peninsula, Newfoundland. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328989.
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Stratigraphic and lithogeochemical data were collected from selected drill core from the Nugget Pond gold deposit in the Betts Cove area, Newfoundland. The stratigraphy consists of a lower unit of basaltic rocks that are massive to pillowed (Mount Misery Formation). This is overlain by sedimentary rocks of the Scrape Point Formation that consist of lower unit of turbiditic siltstone and hematitic cherts/iron formations (the Nugget Pond member); the unit locally has a volcaniclastic rich-unit at its base and grades upwards into finer grained volcaniclastic/turbiditic rocks. This is capped by basaltic rocks of the Scrape Point Formation that contain pillowed and massive mafic flows that are distinctively plagioclase porphyritic to glomeroporphyritic. The mafic rocks of the Mount Misery Formation have island arc tholeiitic affinities, whereas Scrape Point Formation mafic rocks have normal mid-ocean ridge (N-MORB) to backarc basin basalt (BABB) affinities. One sample of the latter formation has a calc-alkalic affinity. All of these geochemical features are consistent with results and conclusions from previous workers in the area. Clastic sedimentary rocks and Fe-rich sedimentary rocks of the Scrape Point Formation have features consistent with derivation from local, juvenile sources (i.e., intra-basinal mafic rocks). The Scrape Point Formation sedimentary rocks with the highest Fe/Al ratios, inferred to have greatest amount of hydrothermally derived Fe, have positive Ce anomalies on Post-Archean Australian Shale (PAAS)-normalized trace element plots. These features are consistent with having formed via hydrothermal venting into an anoxic/ sub-oxic water column. Further work is needed to test whether these redox features are a localized feature (i.e., restricted basin) or a widespread feature of the late Cambrian-early Ordovician Iapetus Ocean, as well as to delineate the role that these Fe-rich sedimentary rocks have played in the localization of gold mineralization within the Nugget Pond deposit.
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Cecile, M. P., B. S. Norford, G. S. Nowlan y T. T. Uyeno. Lower Paleozoic stratigraphy and geology, Richardson Mountains, Yukon (with stratigraphic and paleontological appendices). Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329454.
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The Richardson Trough was a rift basin on the southern margin of an ancestral Iapetus Ocean. It was part of a complex paleogeography that included at least two major rift basins on western Franklinian and northern Cordilleran continental shelves. This paleogeography included the Ogilvie Arch, Porcupine Platform, Blackstone 'supra-basin', Babbage Basin, Husky Lakes Arch, Richardson Trough, Mackenzie Arch, Lac des Bois Platform, and the White Mountains and Campbell uplifts. The Richardson Trough was the failed arm of a triple rift system that formed when an early Paleozoic Iapetus Ocean developed north of the trough. The Richardson Trough displays a classic 'steer's head' profile with two rift fill cycles. The first features late early to middle late Cambrian rifting and late late Cambrian to late Early Ordovician post-rift subsidence; the second, late Early Ordovician to early Silurian rifting and late early Silurian to early Middle Devonian post-rift subsidence. Lower Paleozoic strata exposed in the Richardson Trough range in age from middle Cambrian to early Middle Devonian and are similar to strata in their sister rift, the Misty Creek Embayment. Before this study, the stratigraphic units defined for the Richardson Trough were the Slats Creek Formation and the Road River Formation. Here, the Slats Creek Formation and a new Road River Group are recognized. In order, this group consists of the middle and/or late Cambrian to Early Ordovician Cronin Formation; the early Early Ordovician to latest early Silurian Mount Hare Formation; the early Silurian to late Silurian Tetlit Formation; and the late Silurian to early Middle Devonian Vittrekwa Formation. These Road River Group strata are unconformably overlain by the late Middle to Late Devonian Canol Formation (outcrop) and by the Early Devonian Tatsieta Formation (subsurface).