Bibliografías temáticas / Jackpot (Dog)

Índice

Artículos de revistas
Tesis
Libros
Capítulos de libros
Actas de conferencias

Literatura académica sobre el tema "Jackpot (Dog)"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 31 de julio de 2024

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros

Elija tipo de fuente:

Consulte las listas temáticas de artículos, libros, tesis, actas de conferencias y otras fuentes académicas sobre el tema "Jackpot (Dog)".

Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.

También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.

Artículos de revistas sobre el tema "Jackpot (Dog)"

Hanrahan, Rebecca. "Dog Duty". Society & Animals 15, n.º 4 (2007): 379–99. http://dx.doi.org/10.1163/156853007x235546.

Texto completo

Resumen

AbstractBurgess-Jackson (1998) argues that the duties we have to our companion animals are similar to the duties we have to our children. Specifically, he argues that a person who takes custody of either a nonhuman animal or a child elevates the moral status of the child or animal, endowing each with rights neither had before. These rights obligate that person to provide for the well being of the creature—animal or child—in question. This paper offers two arguments against this position. First, a creature's rights rest solely on the creature's intrinsic properties. Thus, the person taking custody of a creature does not endow the creature with new rights. Rather, the custodian assumes the responsibilities associated with ensuring that the creature's rights are protected and preserved. Second, our children possess intrinsic properties and, hence, rights—most important, the right to life—that our pets lack. This difference undermines the analogy on which Burgess-Jackson's argument depends. Our pets are not like our children, as Burgess-Jackson claims. Instead, they are more akin to our slaves.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Melikoğlu, Esra. "Culpable/Maternal Detectives: The Impossibility of a Caring Ecofeminist Community in Atkinson's Started Early, Took My Dog". Crime Fiction Studies 2, n.º 2 (septiembre de 2021): 171–85. http://dx.doi.org/10.3366/cfs.2021.0045.

Texto completo

Resumen

In Kate Atkinson's ecofeminist crime novel Started Early, Took My Dog, the (semi-)retired investigators Jackson Brodie and Tracy Waterhouse at once collude with and wish to change exploitative capitalist patriarchal society. Trafficking epitomises its crime: the domination and exploitation of human and nonhuman animal others. Ecofeminism urges us to reconsider our complicity and embrace the vision of an interspecies community rooted in the motherly ethics of care. When confronted with a trafficked dog and female child, respectively, the tough Jackson and Tracy wish to transform into the maternal investigator of ecofeminist revision and create a caring (interspecies) family. But behind their maternal appearances lurks the noir perpetrator who mirrors his or her society's crimes. I argue that Atkinson uses the noir convention of the hard-boiled investigator shifting between identities – here borrowed from a sub-generic variant – to explore ordinary men and women's entrapment in contemporary society in the conflict between complicity and care. Through manipulation of point of view, we the readers are in fact implicated in this conflict as well.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Rossmeissl, Erin M., Katharine G. Palmer, Michael G. Hoelzler y Ryan P. Fulcher. "Multiple Magnet Ingestion as a Cause of Septic Peritonitis in a Dog". Journal of the American Animal Hospital Association 47, n.º 1 (1 de enero de 2011): 56–59. http://dx.doi.org/10.5326/jaaha-ms-5656.

Texto completo

Resumen

A 1 yr old male castrated Yorkshire terrier was referred after ingesting magnets. Dehydration, fever, tachycardia, and abdominal pain were noted on physical examination. Abdominal radiographs revealed two radiopaque foreign objects in close proximity to each other with decreased abdominal detail. Surgical exploration identified magnets adhered together in the omentum with perforations present in the transverse colon and stomach. The perforations were closed and a Jackson-Pratt continuous suction drain was placed. Septic peritonitis secondary to intestinal perforation from magnet ingestion was successfully treated with a combination of surgery and a closed suction drain.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Mack, Gary W. "Hypothalamic control of body temperature: insights from the past". Journal of Applied Physiology 97, n.º 5 (noviembre de 2004): 1593–94. http://dx.doi.org/10.1152/classicessays.00011.2004.

Texto completo

Resumen

This essay looks at the historical significance of three APS classic papers that are freely available online: Hammel HT, Hardy JD, and Fusco MM. Thermoregulatory responses to hypothalamic cooling in unanesthetized dogs. Am J Physiol 198: 481—486, 1960 ( http://ajplegacy.physiology.org/cgi/reprint/198/3/481 ). Hammel HT, Jackson DC, Stolwijk JAJ, Hardy JD, and Strømme SB. Temperature regulation by hypothalamic proportional control with an adjustable set point. J Appl Physiol 18: 1146—1154, 1963 ( http://jap.physiology.org/cgi/reprint/18/6/1146 ). Hellstrøm B and Hammel HT. Some characteristics of temperature regulation in the unanesthetized dog. Am J Physiol 213: 547—556, 1967 ( http://ajplegacy.physiology.org/cgi/reprint/213/2/547 ).

Los estilos APA, Harvard, Vancouver, ISO, etc.

Mack, Gary W. "Hypothalamic control of body temperature: insights from the past". American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 287, n.º 5 (noviembre de 2004): R1012—R1013. http://dx.doi.org/10.1152/classicessays.00011a.2004.

Texto completo

Resumen

This essay looks at the historical significance of three APS classic papers that are freely available online: Hammel HT, Hardy JD, and Fusco MM. Thermoregulatory responses to hypothalamic cooling in unanesthetized dogs. Am J Physiol 198: 481-486, 1960 ( http://ajplegacy.physiology.org/cgi/reprint/198/3/481 ). Hammel HT, Jackson DC, Stolwijk JAJ, Hardy JD, and Strømme SB. Temperature regulation by hypothalamic proportional control with an adjustable set point. J Appl Physiol 18: 1146-1154, 1963 ( http://jap.physiology.org/cgi/reprint/18/6/1146 ). Hellstrøm B and Hammel HT. Some characteristics of temperature regulation in the unanesthetized dog. Am J Physiol 213: 547-556, 1967 ( http://ajplegacy.physiology.org/cgi/reprint/213/2/547 ).

Los estilos APA, Harvard, Vancouver, ISO, etc.

Angelou, Vasileia, Kiriakos Chatzimisios, Christos Koutinas y Lysimachos G. Papazoglou. "Jackson-Henderson technique for the revision surgery following PDA rupture in a dog". Topics in Companion Animal Medicine 44 (agosto de 2021): 100533. http://dx.doi.org/10.1016/j.tcam.2021.100533.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

SEIFERT, STEVEN y JAMES H. MCLAUGHLIN. "Penny Eaters Beware!" Pediatrics 76, n.º 6 (1 de diciembre de 1985): 1020. http://dx.doi.org/10.1542/peds.76.6.1020a.

Texto completo

Resumen

To the Editor.— Acute toxicity may complicate the ingestion of US pennies minted since October 1982. In December 1984, an 11-lb dog died from multisystem failure attributed to markedly elevated serum and tissue levels following the ingestion of two such coins (The Arizona Daily Star, Dec 4, 1984, pp 1-2). The mostly copper alloy one-cent piece was replaced in 1982 by one with a zinc core and a thin copper jacket. Although the copper is relatively inert, a break in the copper casing in an acid environment or prolonged acid exposure of an intact coin will cause dissolution and absorption of the zinc (The Arizona Daily Star, Dec 4, 1984, pp 1-2).

Los estilos APA, Harvard, Vancouver, ISO, etc.

JACKSON, STEPHEN M., PETER J. S. FLEMING, MARK D. B. ELDRIDGE, SANDY INGLEBY, TIM FLANNERY, REBECCA N. JOHNSON, STEVEN J. B. COOPER et al. "The Dogma of Dingoes—Taxonomic status of the dingo: A reply to Smith et al." Zootaxa 4564, n.º 1 (4 de marzo de 2019): 198. http://dx.doi.org/10.11646/zootaxa.4564.1.7.

Texto completo

Resumen

Adopting the name Canis dingo for the Dingo to explicitly denote a species-level taxon separate from other canids was suggested by Crowther et al. (2014) as a means to eliminate taxonomic instability and contention. However, Jackson et al. (2017), using standard taxonomic and nomenclatural approaches and principles, called instead for continued use of the nomen C. familiaris for all domestic dogs and their derivatives, including the Dingo. (This name, C. familiaris, is applied to all dogs that derive from the domesticated version of the Gray Wolf, Canis lupus, based on nomenclatural convention.) The primary reasons for this call by Jackson et al. (2017) were: (1) a lack of evidence to show that recognizing multiple species amongst the dog, including the Dingo and New Guinea Singing Dog, was necessary taxonomically, and (2) the principle of nomenclatural priority (the name familiaris Linnaeus, 1758, antedates dingo Meyer, 1793). Overwhelming current evidence from archaeology and genomics indicates that the Dingo is of recent origin in Australia and shares immediate ancestry with other domestic dogs as evidenced by patterns of genetic and morphological variation. Accordingly, for Smith et al. (2019) to recognise Canis dingo as a distinct species, the onus was on them to overturn current interpretations of available archaeological, genomic, and morphological datasets and instead show that Dingoes have a deeply divergent evolutionary history that distinguishes them from other named forms of Canis (including C. lupus and its domesticated version, C. familiaris). A recent paper by Koepfli et al. (2015) demonstrates exactly how this can be done in a compelling way within the genus Canis—by demonstrating deep evolutionary divergence between taxa, on the order of hundreds of thousands of years, using data from multiple genetic systems. Smith et al. (2019) have not done this; instead they have misrepresented the content and conclusions of Jackson et al. (2017), and contributed extraneous arguments that are not relevant to taxonomic decisions. Here we dissect Smith et al. (2019), identifying misrepresentations, to show that ecological, behavioural and morphological evidence is insufficient to recognise Dingoes as a separate species from other domestic dogs. We reiterate: the correct binomial name for the taxon derived from Gray Wolves (C. lupus) by passive and active domestication, including Dingoes and other domestic dogs, is Canis familiaris. We are strongly sympathetic to arguments about the historical, ecological, cultural, or other significance of the Dingo, but these are issues that will have to be considered outside of the more narrow scope of taxonomy and nomenclature.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Azpiroz, F. y J. R. Malagelada. "Vagally mediated gastric relaxation induced by intestinal nutrients in the dog". American Journal of Physiology-Gastrointestinal and Liver Physiology 251, n.º 6 (1 de diciembre de 1986): G727—G735. http://dx.doi.org/10.1152/ajpgi.1986.251.6.g727.

Texto completo

Resumen

Using a gastric barostat to measure gastric tone, we previously demonstrated that nutrient perfusion into the intestine induces gastric relaxation. To investigate the pathway of this enterogastric reflex we surgically isolated the vagi either in a cervical skin tunnel (3 dogs) or within an implanted supradiaphragmatic cooling jacket (3 dogs). In the conscious fasted dogs, cervical or supradiaphragmatic vagal blockade by cooling (5 degrees C X 10 min) induced a reversible gastric relaxation. Bethanechol (0.2 mg X kg-1 X h-1 iv) alone or in combination with adrenergic blockers (phentolamine 1.5 mg X kg-1 X h-1 + propranolol 0.3 mg X kg-1 X h-1) suppressed the cooling-induced relaxation but did not abolish gastric relaxation induced by intestinal nutrient perfusion (Osmolite, 3.1 ml/min). At this point, vagal cooling, either cervical or supradiaphragmatic, reversibly blocked the nutrient-induced gastric relaxation: gastric tone significantly increased driven by the cholinergic background and reverted after vagal rewarming to the previous relaxed state. We conclude that intestinal nutrients induce gastric relaxation by a nonadrenergic noncholinergic mechanism. This reflex is mediated by fibers contained in the vagus nerves at both cervical and supradiaphragmatic levels.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Meecham, Ken y Stuart Purbrick. "Comparison of cardiovascular data obtained using jacket and implant telemetry in the beagle dog". Journal of Pharmacological and Toxicological Methods 60, n.º 2 (septiembre de 2009): 246. http://dx.doi.org/10.1016/j.vascn.2009.04.151.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Más fuentes

Tesis sobre el tema "Jackpot (Dog)"

Muir, Kristy Lynn. "The Effects of Jackpots on Responding and Choice in Two Domestic Dogs". Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc28456/.

Texto completo

Resumen

The current study investigated the impact of delivering a jackpot on response rate and response allocation in two domestic dogs. For the purpose of this research, a jackpot was defined as a one-time, within-session increase in the magnitude of reinforcement. Two experiments were conducted to investigate the effects of delivering a jackpot in both single-operant and concurrent schedule procedures. Experiment 1 investigated the impact of a one-time, within-session increase in the magnitude of reinforcement on response rate in a single-operant procedure. Results of Experiment 1 showed no clear change in response rate after the delivery of the jackpot. Experiment 2 investigated the impact of a one-time, within-session increase in the magnitude of reinforcement on response allocation in a concurrent schedule procedure. Results of Experiment 2 showed an increase in response allocation to the jackpotted contingency in both subjects. These results suggest that a jackpot, as defined here, has no effect in single-operant procedures while having an effect in concurrent schedule procedures. These effects are similar to those reported in the magnitude of reinforcement literature.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Bradley, Peter Douglas. "Towards a theory of family therapy : rediscovering the influence of Don D. Jackson /". Diss., This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-06062008-151643/.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Axing, Maria y Veronika Elg. ""They don´t care about us!" : Aftonbladets och Dagens Nyheters framställning av Michael Jackson bortgång". Thesis, Jönköping University, HLK. Media and communication science, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-11705.

Texto completo

Resumen

Den 25 juni 2009 dog en av världens mest kända artister, Michael Jackson. Detta orsakade stora rubriker i massmedierna och fans över hela världen sörjde. Denna uppsats handlar om hur Michael Jacksons bortgång framställdes i av de största tidningarna i Sverige, Aftonbladet och Dagens Nyheter. Vi formulerade följande frågeställningar:

Hur framställs och vinklas Michael Jacksons bortgång i Aftonbladet respektive Dagens Nyheter?
I vad mån skiljer sig framställningen och vinklingen mellan de båda tidningarna?

Genom en kvalitativ textanalys som analysredskap försökte vi besvara dessa frågeställningar. Vi kompletterade med en bildanalys för att få en bättre förståelse för hur bilderna representerar texten. Urvalet bestod av 27 tidningsartiklar under perioden den 25 juni till och med den 9 juli 2009. Sammanlagt blev det 27 artiklar.

Uppsatsens teoretiska bas är medielogik och representationsteori. Medielogiken var den primära teorin eftersom den utgår från det journalistiska arbetet.

Resultatet visade att Michael Jackson framställdes positivt genom sin musikkarriär men negativt i privatlivet. Stort fokus lades på minnesstunden och orsaken till Michael Jacksons bortgång. Båda tidningarna använde sig av värdeladdade ord för att förtydliga framställningen av honom. Båda tidningarna har använt sig av både mer och mindre tillförlitliga källor. Undersökningen visade att flera skillnader fanns mellan hur tidningarna skildrade Michael Jacksons bortgång.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Libros sobre el tema "Jackpot (Dog)"

Epstein, Sam. Jackpot of the Beagle Brigade. New York: Macmillan, 1987.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Atkinson, Kate. Started early, took my dog. London: Doubleday, 2010.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Service, United States Forest. Black-tailed prairie dog conservation and management on the Nebraska National Forest and associated units: Draft environmental impact statement : located within Dawes, Sioux, Blaine, Cherry, Thomas Counties, Nebraska and Custer, Fall River, Jackson, Pennington, Jones, Lyman, Stanley Counties, South Dakota. Chadron, NE?]: U.S.Dept. of Agriculture, Forest Service, 2005.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Cherry-Garrard, Apsley. The Worst Journey in the World. Crabtree: The Narrative Press, 2001.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Cherry-Garrard, Apsley. The worst journey in the world. North Salem, NY: Adventure Library, 1997.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Cherry-Garrard, Apsley. The worst journey in the world: Antarctica, 1910-1913. New York: Skyhorse Pub., 2013.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Cherry-Garrard, Apsley. The worst journey in the world: With Scott in Antarctica 1910-1913. Mineola, N.Y: Dover Publications, Inc., 2010.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Cherry-Garrard, Apsley. The worst journey in the world. Washington, D.C: National Geographic, 2002.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Cherry-Garrard, Apsley. Shi jie zui xian e zhi lü. Chongqing: Chongqing chu ban she, 2007.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Cherry-Garrard, Apsley. The worst journey in the world. New York: Penguin Books, 2006.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Más fuentes

Capítulos de libros sobre el tema "Jackpot (Dog)"

Folwell, Emma J. "Black Empowerment in Jackson". En The War on Poverty in Mississippi, 99–126. University Press of Mississippi, 2020. http://dx.doi.org/10.14325/mississippi/9781496827395.003.0005.

Texto completo

Resumen

Chapter four traces the intersection between Mississippi’s long freedom struggle and the federally funded war on poverty in the state capitol, Jackson. First, it describes the development of the capitol’s civil rights activism through the 1950s and into the 1960s, with sit-in campaigns drawing on the vibrancy of Tougaloo College, the Jackson NAACP Youth Council, and the leadership of Medgar Evers. The chapter then explores the way in which the class divisions which undermined activism in Jackson fed into the creation of the city’s anti-poverty program, Community Services Association. It traces the way in which one black activist and poverty warrior, Don Jackson, used his position in the Neighborhood Youth Corps to foster the city’s youthful activism. These efforts were, however, quickly undermined by the city’s powerful mechanisms of white supremacy, notably the state sovereignty commission.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Evans, Christopher H. "“Tell Every Body to Be Good”". En Do Everything, 51—C4.P43. Oxford University PressNew York, 2022. http://dx.doi.org/10.1093/oso/9780190914073.003.0005.

Texto completo

Resumen

Abstract This chapter carries Frances Willard’s story through the 1860s, exploring her life during the Civil War, her teaching career, and her efforts to become a writer. In 1862, her sister, Mary, died, leading Willard to publish her first major book, Nineteen Beautiful Years, a biography of her late sister. The book illustrated several evangelical themes of personal piety and entire sanctification that Willard later emphasized in the Woman’s Christian Temperance Union (WCTU). This chapter focuses on Willard’s friendship with other schoolteachers, in particular Kate Jackson. After her father’s death, Willard and Jackson traveled two and one-half years through Europe and the Middle East, allowing Willard to explore issues of women’s rights. A highlight for Willard was her time in Paris, where she met with the French feminist Julie Victoire Daube. These travel experiences provided her a template that she was later able to use in undertaking a career as a college educator and social reformer.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Bauer, Mark S. "Donald Justice (1925–2004)". En A Mind Apart, 255–58. Oxford University PressNew York, NY, 2008. http://dx.doi.org/10.1093/oso/9780195336405.003.0090.

Texto completo

Resumen

Abstract Counting the Mad This one was put in a jacket, This one was sent home, This one was given bread and meat But would eat none, And this one cried No No No No All day long. This one looked at the window As though it were a wall, This one saw things that were not there, This one things that were, And this one cried No No No No All day long. This one thought himself a bird, This one a dog, And this one thought himself a man, An ordinary man, And cried and cried No No No No All day long. The Man Closing Up 1 Like a deserted beach, The man closing up.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Colby, Georgina. "Writing-through: Don Quixote: Which Was a Dream". En Kathy Acker. Edinburgh University Press, 2016. http://dx.doi.org/10.3366/edinburgh/9780748683505.003.0003.

Texto completo

Resumen

Chapter 3 reads Acker’s Don Quixote: Which Was a Dream as a form of non-procedural ‘writing-through’, a term that has its roots in the procedural practices of John Cage and Jackson Mac Low, discussed in chapter one. Acker’s literary experiment in Don Quixote is related to abortion as a literary trope, and is positioned in contrast to models of male-to-male literary insemination and canon formation. The chapter draws on the contemporary scholarship surrounding conceptual practice, such as the work of Caroline Bergvall, and addresses the tendency of critical studies on Acker’s work to use the term ‘appropriation’ as a blanket term. Acker’s experimental practices in Don Quixote are readdressed, paying attention to the complexity of those strategies. Reading the work with attention to Acker’s practice of abstraction, experimentation with translation, paragrammatic play, and the protosemantic, a method of writing through emerges whereby voice is imbricated with the negation of language. In Don Quixote experimental practice displaces centralized narrative and offers a new feminist temporality.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Novak, Barbara. "Pollock and Olson: Time, Space, and the Activated Bodily Self". En Voyages of the Self, 135–62. Oxford University PressNew York, NY, 2007. http://dx.doi.org/10.1093/oso/9780195305906.003.0008.

Texto completo

Resumen

Abstract Jackson Pollock and Charles Olson had many things in common, Herman Melville among them. Few books seem to have affected Pollock, but those that did were very significant. Moby-Dick was important enough for some of his paintings to have that title: Untitled (Blue (Moby-Dick)) and Pasiphaë (in its original title). Possibly even more telling, he named his dog Ahab. Lee Krasner once remarked that Pollock’s favorite work by Melville was Moby-Dick, while hers, because of the way it treated good and evil, was Billy Budd. Is Pollock’s 1945 Portrait of H.M. a portrait of Melville? What kinship did Pollock feel with Melville—as artist, and as man? Olson’s more profound involvement with Melville is easier to chart. Olson, author of the epic Maximus Poems, was one of the greatest of Melville scholars, whose imaginative Call Me Ishmael I find more exciting and provocative than any academic treatise on him. For Olson, Melville was a nineteenth-century prophet or forerunner of “projective space,” an active principle that also fuses Pollock and Olson within their cultural moment.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Kiddey, Rachael. "Wandering Abroad: Ethnographic Journeys in the City". En Homeless Heritage. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198746867.003.0010.

Texto completo

Resumen

I agreed to meet Punk Paul on Stokes Croft at around 8 a.m. Paul was exactly where he said he would be—behind the bin next to The Big Issue office. In his early forties, Punk Paul was everything a punk should be—a devout follower of punk bands across the UK, he sported a blue Mohican (when bathroom facilities and soap rations permitted), army issue boots and a battered leather jacket covered in ‘anti-fa’ (anti-fascist) symbols. Paul fashioned the rest of his clothes from whatever he was given by church volunteers and picked up along the way. His distain of authority was firm but friendly. ‘Evening officer,’ he could often be heard saying, with a wink, to local police who regularly busted him for drinking in ‘no drinking zones’. ‘Could you spare a few shekels for an old sea dog? I’m trying to get together a pirate ship to sail off the end of the earth!’ ‘I have to pay Abdul £10.03,’ Paul said, as I approached. Abdul, Stokes Croft’s kindly but long-suffering newsagent, let some homeless people, including Paul, have beer on tick. We walked the short distance from the post office to Abdul’s shop and I waited outside with my dogs while Paul paid his debt. He was holding a can of Tennant’s lager when he reappeared. ‘It’s sort of a constant debt that I have with Abdul!’ He grinned before leading the way down City Road, Brighton Road, and onto Wilder Street. ‘You have to see this place! If you want to see what homelessness is really like in this country . . . this city could be any city, if you ask me. You have to see this place!’ We continued down Wilder Street until we reached a semi-derelict building. Through peeling paint it was possible to read ‘Bristol Transmissions’ above the long-ago boarded-up shop window. ‘It’s known as “The Black House”,’ Paul said, pushing the door. A padlock had been smashed off. Inside, there were two downstairs rooms, both hugely decayed with missing floorboards.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Nelson, Claudia y Anne Morey. "History is a Map 2". En Topologies of the Classical World in Children's Fiction, 144–86. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198846031.003.0005.

Texto completo

Resumen

This chapter examines a set of texts—Rick Riordan’s Percy Jackson and the Olympians series (2005–9), Vaughan Edwards and Barry Creyton’s The Dogs of Pompeii (2011), Paul Shipton’s Gryllus the Pig duology (2004–6), Gary Northfield’s Julius Zebra series (2015–18), and Robin Price’s Spartapuss series (2004–15)—that undermine the reader’s presumption of distance from the classical world through an emphasis upon grotesquerie and play. While the protagonists of the first two sets of texts examined are children, the other books deploy animals or humans in animal bodies to emphasize that the classics are accessible to the child reader and that consuming narratives about the past is both serious business and play. In these narratives, the past is itself an object to be consumed as popular culture is consumed; the protagonist of these narratives is likewise obliged to offer himself as an object of consumption through acts of heroic (or mock-heroic) self-sacrifice. Rather than proposing the past as a hard-to-access site of superior culture, these narratives propose it as a place of triumphant popular culture familiar to child readers from their own experience.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Zolten, Jerry. "“Let’s Go Out to the Programs”". En Great God A'Mighty! The Dixie Hummingbirds, 199–254. 2^a ed. Oxford University PressNew York, 2022. http://dx.doi.org/10.1093/oso/9780190071493.003.0007.

Texto completo

Resumen

Abstract The 1950s were a mix of turbulence and triumph for the civil rights movement. Gospel music was the soundtrack. The first wave of rock 'n' roll was dominated by African American vocal groups emulating the gospel sound. The Dixie Hummingbirds as pioneers of soul gospel established themselves in the top tier of the genre. Gospel stars such as Clara Ward, Rosetta Tharpe, and Mahalia Jackson organized nationwide package tours that often featured the Dixie Hummingbirds. Black gospel had become an art form. In 1952, the Hummingbirds signed with Don Robey’s Houston-based Peacock Records. The records they cut featured the latest member, electric guitarist Howard Carroll. Many of their Peacock tracks were “hits” that established their legacy forevermore. The Hummingbirds were booked through Robey's Buffalo Booking Agency with Evelyn Johnson at the helm. They established a touring pattern: warm weather states in the winter, the north and west the rest of the year. Group anniversaries were celebrated in Philadelphia with gospel extravaganzas at the “Met.” The Hummingbirds as headliner helped inaugurate gospel shows at the Apollo Theater. Peacock launched an album series with a Dixie Hummingbirds release. The quintessential lineup was now in place: James Davis, Ira Tucker, James Walker, Beachey Thompson, William Bobo, and Howard Carroll.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Mahajan, Gurpreet. "Living with Religious Diversity: The Limits of the Secular Paradigm". En The Problem of Religious Diversity. Edinburgh University Press, 2017. http://dx.doi.org/10.3366/edinburgh/9781474419086.003.0004.

Texto completo

Resumen

In April 2016, Air France sent an email to the women crewmembers instructing them to ‘wear trousers during flights to Iran and to don a “loose-fitting jacket and headscarf” before leaving the plane in Tehran’ (Willsher 2016). Many people were outraged by this announcement. While some people saw this as a sign of France yielding, if not being subservient, to the demands of the Muslim culture, others complained that women were being compelled to wear ‘ostentatious religious signs’ – something that France prohibits explicitly in its own territory. Eventually the matter was settled as the airline gave the staff a choice: they could opt out of flying to Tehran. Air France notified that ‘If, for personal reasons, they [crewmembers] don’t want to wear the headscarf when they leave the plane they would be reassigned to another destination’ (Hickford 2016). This decision took care of the immediate concerns of the women employees but the question that remains is: why did the national carrier issue such instructions? When France prohibits the donning of a full burqa or a veil that completely covers the face in the public domain, can it justifiably ask crewmembers flying into Tehran to wear a headscarf?

Los estilos APA, Harvard, Vancouver, ISO, etc.

Sawyer, R. Keith. "Personality Psychology". En Explaining Creativity, 39–56. Oxford University PressNew York, NY, 2006. http://dx.doi.org/10.1093/oso/9780195161649.003.0003.

Texto completo

Resumen

Abstract As the applause swelled, Dr. Guilford took a deep breath, smoothed his tie and jacket, and began to walk to the podium. It was 1950, and Dr. Guilford was at the peak of his long and illustrious career. He had dedicated his life to psychological research. He’d played a key leadership role during World War II, helping the U.S. military carry out the most massive testing program in history. And now, he had attained the highest honor that the discipline of psychology could give—he had been elected president of the American Psychological Association. Every year, at the annual meeting of the Association, the president gives the keynote speech, and this was Dr. J. P. Guilford’s moment (see figure 3.1). Presidents traditionally use this opportunity to emphasize an important issue that they think deserves more psychological study. As Dr. Guilford began his talk, the hundreds of assembled psychologists in the room were shocked when they realized the topic he had chosen. The APA president had chosen to talk about creativity. To understand why a professional psychologist in 1950 would be shocked to hear a speech about creativity from the APA president, you need to know a little about the field of psychology at the time. Since the 1920s, American psychology had been dominated by behaviorism—think of Pavlov’s salivating dog and Skinner’s experiments with pigeons. Behaviorists studied only behaviors they could see, and refused to consider anything that happened inside the brain. By the 1970s, this approach had been rejected by most psychologists, but 1950 was the heyday of behaviorism, and behaviorism didn’t have much to say about creativity.1

Los estilos APA, Harvard, Vancouver, ISO, etc.

Actas de conferencias sobre el tema "Jackpot (Dog)"

Raposo, Kadiana. "A gênese de Jackson Pollock". En Encontro de História da Arte. Universidade Estadual de Campinas, 2009. http://dx.doi.org/10.20396/eha.5.2009.4029.

Texto completo

Resumen

A força que irradia de uma tela como o One (1950), de Jackson Pollock, faz o espírito sensível à pintura sofrer um nocaute para depois, ainda cambaleante, sentir a potência do universo fino e convulsivo de sua pintura. Aqui, a aventura moderna, esse salto no desconhecido, vibra mais uma vez, agora sob a inteligência feroz do artista norteamericano que na segunda metade do século XX, em Nova Iorque, cria uma nova forma de pensar a pintura. Pollock tem o espírito do homem moderno mas com o pathos inelutável de um artista formado na cena social, política e cultural americana, dos anos 30 aos anos 50, do século XX.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ambrosio, Ana Maria y Flávio Roberto Dias Velasco. "Um Sistema para Execução de Especificações JSD". En Simpósio Brasileiro de Engenharia de Software. Sociedade Brasileira de Computação, 1988. http://dx.doi.org/10.5753/sbes.1988.24248.

Texto completo

Resumen

Um dos princípios básicos dos modelos operacionais é a possibilidade de se executar diretamente a especificação de requisitos de software. Neste trabalho, o método JSD ("Jackson System Development") é considerado um modelo operacional e, para tanto, são apresentados uma linguagem e uma ferramenta que possibilitam a execução de especificações JSD.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ferreira, Maria Clara, Katia Broeto Miller y Isabel Ribeiro Amaral. "Printed jacket made from experimental recycling: reflecting new ways of creating and thinking about possibilities with low-density polymer". En SDS 2023 - IX SIMPÓSIO DE DESIGN SUSTENTÁVEL. Grupo de Pesquisa Virtuhab/UFSC, 2023. http://dx.doi.org/10.29183/978-65-00-87779-3.sds2023.p773-784.

Texto completo

Resumen

O impacto do consumo em larga escala dos polímeros petroquímicos no planeta desencadeia grandes prejuízos para o meio ambiente e manutenção da vida, por isso se trouxe alternativas de reciclagem deste material vislumbrando novas possibilidades, aplicando técnicas de forma experimental sobre polímero petroquímico de baixa densidade (PEBD) para prototipar uma jaqueta estampada inspirada nos figurinos dos anos 80 da série . Mostrando que tem como sair do óbvio aplicando o design circular no cotidiano e discutindo a importância de repensar como temos lidado com o plástico em todas suas formas, contribuindo para o conhecimento existente acerca do assunto.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ahmadi, Hamid, Hassan Karampour, Mahdi Ghorbani y Hamid Fard. "A Study on the Degree of Bending (DOB) in Two-Planar Tubular DYT-Joints of Offshore Jacket Structures: Geometrical Effects and Fatigue Design Formulation". En ASME 2023 42nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/omae2023-100940.

Texto completo

Resumen

Abstract Through-the-thickness stress distribution in a tubular member has a profound effect on the fatigue behavior of tubular joints commonly found in steel offshore structures. This stress distribution can be characterized by the degree of bending (DoB). Although multi-planar joints are an intrinsic feature of offshore tubular structures and the multi-planarity usually has a considerable effect on the DoB values at the brace-to-chord intersection, few investigations have been reported on the DoB in multi-planar joints due to the complexity of the problem and high cost involved. In the present research, data extracted from the stress analysis of 243 finite element (FE) models, verified based on available parametric equations, was used to study the effects of geometrical parameters on the DoB values in two-planar tubular DYT-joints. Results showed that it is quite common for an axially loaded two-planar DYT-joint to have a low DoB. Therefore, when the current standard HSS-based S-N approach is used for the fatigue analysis of axially loaded two-planar DYT-joints, results should be modified to include the effect of the DoB in order to obtain more accurate fatigue life prediction. It was also concluded that for axially loaded two-planar DYT-joints, the parametric formulas of uniplanar YT-joints are not applicable for the DoB prediction, since such formulas may lead to under-/over-predicting results. Parametric FE study was followed by a set of nonlinear regression analyses to develop six new DoB parametric equations for the fatigue analysis and design of axially loaded two-planar DYT-joints.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Duckworth, Robert C., Emily Frame, Leonard S. Fifield y Samuel W. Glass. "Benchmark Accelerated Aging of Harvested Hypalon/EPR and CSPE/XLPE Power and I&C Cable in Nuclear Power Plants". En 2016 24th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icone24-60311.

Texto completo

Resumen

As part of the Light Water Reactor and Sustainability (LWRS) program in the U.S. Department of Energy (DOE) Office of Nuclear Energy, material aging and degradation research is currently geared to support the long-term operation of existing nuclear power plants (NPPs) as they move beyond their initial 40 year licenses. The goal of this research is to provide information so that NPPs can develop aging management programs (AMPs) to address replacement and monitoring needs as they look to operate for 20 years, and in some cases 40 years, beyond their initial, licensed operating lifetimes. For cable insulation and jacket materials that support instrument, control, and safety systems, accelerated aging data are needed to determine priorities in cable aging management programs. Before accelerated thermal and radiation aging of harvested, representative cable insulation and jacket materials, the benchmark performance of a new test capability at Oak Ridge National Laboratory (ORNL) was evaluated for temperatures between 70 and 135°C, dose rates between 100 and 500 Gy/h, and accumulated doses up to 200 kGy. Samples that were characterized and are representative of current materials in use were harvested from the Callaway NPP near Fulton, Missouri, and the San Onofre NPP north of San Diego, California. From the Callaway NPP, a multiconductor control rod cable manufactured by Boston Insulated Wire (BIW), with a Hypalon/ chlorosulfonated polyethylene (CSPE) jacket and ethylene-propylene rubber (EPR) insulation, was harvested from the auxiliary space during a planned outage in 2013. This cable was placed into service when the plant was started in 1984. From the San Onofre NPP, a Rockbestos Firewall III (FRIII) cable with a Hypalon/ CSPE jacket with cross-linked polyethylene (XLPE) insulation was harvested from an on-site, climate-controlled storage area. This conductor, which was never placed into service, was procured around 2007 in anticipation of future operation that did not occur. Benchmark aging for both jacket and insulation material was carried out in air at a temperature of 125°C or in a uniform 140 Gy/h gamma field over a period of 60 days. Their mechanical properties over the course of their exposures were compared with reference data from comparable cable jacket/insulation compositions and aging conditions. For both accelerated thermal and radiation aging, it was observed that the mechanical properties for the Callaway BIW control rod cable were consistent with those previously measured. However, for the San Onofre Rockbestos FRIII, there was an observable functional difference for accelerated thermal aging at 125°C. Details on possible sources for this difference and plans for resolving each source are given in this paper.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Watkins, Kenneth S., Shelby J. Morris, C. P. Wong, Lianhua Fan, Yang Yang Sun, Daniel D. Masakowski y Wendy Alvis. "An Electrical Condition Monitoring Approach for Wire and Cable". En 12th International Conference on Nuclear Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/icone12-49559.

Texto completo

Resumen

An electrical cable condition monitoring (CCM) method utilizing conductive polymer age sensors provides a distributed, in-situ approach that reduces access considerations and eliminates destructive testing, increasing safety by monitoring areas otherwise impractical or impossible. It reduces the cost of Generation IV cable condition monitoring by eliminating sample-retrieval and significantly reducing testing costs associated with conventional mechanical and chemical condition monitoring. Future applications include simple, lowcost condition monitoring of virtually any polymer used in industry, transportation, construction and recreation. The proposed CCM method utilizes inert conductive particles compounded with candidate insulation materials to provide an age “sensor” distributed in the wire or cable insulation or jacket. A simple electrical measurement, the resistivity of the sensor, correlates age-related degradation of mechanical properties such as elongation at break (EAB) and provides a means to determine remaining life of the insulation material. This paper summarizes the results of research being conducted under a DOE Small Business Innovative Research grant in concert with the School of Materials Science and Engineering at Georgia Tech and Rockbestos-Surprenant Cable Corp.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Kirkpatrick, Steven W. "Effects of Lading Conditions on Puncture Resistance and Release Probability of HAZMAT Tank Cars". En 2024 Joint Rail Conference. American Society of Mechanical Engineers, 2024. http://dx.doi.org/10.1115/jrc2024-122799.

Texto completo

Resumen

Abstract The derailment on February 3, 2023, in East Palestine, Ohio resulted in both a significant release of hazardous materials (HAZMAT) and fires. As a result of the derailment, and subsequent NTSB and FRA investigations, there will likely be a renewed interest in the safety of transporting HAZMAT in DOT-111 general-purpose tank cars. However, the past regulatory efforts related to the transport of high-hazard flammable commodities in DOT-111 tank cars was focused on the tank car design. There was limited consideration of alternative loading and operational conditions that could have an equally significant impact on the safety and probability of release for these tank cars. The past regulatory responses to safety concerns for HAZMAT transport in railroad tank car safety have developed requirements for strengthening of the tank shell. The March 2009 regulations on poison inhalation hazard (PIH) tank cars (Federal Register, 74 FR 1769) required commodities to be shipped in tank cars with higher pressure ratings (thicker tank walls). Similarly, the July 2015 regulations on high-hazard flammable tank cars (Federal Register, 80 FR 26643) requires the use of DOT-117 tank cars for these commodities instead of the DOT-111 tank cars previously used. The DOT-117 has both a thicker tank shell and requires an external protective jacket compared to the DOT-111 tank. These simple upgrades in the tank thickness/strength, are easy requirements to specify. The upgrades to the tank structure are also relatively simple to evaluate, either in terms of the expected reduction in the conditional probability of release (CPR), or for improved puncture resistance in an impact test or analysis. The effects of different tank car commodities and loading conditions have been evaluated in past tank car safety studies. The effects of the loading conditions, such as the internal pressure and the magnitude of the outage volume (vapor space above the lading), can produce significant changes in the puncture resistance. However, these effects have not been sufficiently considered as a factor for improving safety of HAZMAT transport by rail. The objective of this study is to evaluate the potential for reductions in HAZMAT releases from modifications to the tank loading conditions. Validated tank car impact and puncture analysis methodologies are used to evaluate the effect of these modifications (e.g., larger outage volumes). For example, we analyze the loading conditions required for a DOT-111 tank car to have an equivalent tank shell puncture resistance as a DOT-117 tank car loaded with crude oil at nominal operating conditions. These relative comparisons could be applied by decision makers to make informed choices on the best approaches for improved railroad HAZMAT safety. The results of the study show that the CPR for a DOT-111A100W1 can be significantly reduced, when loaded with larger outage volumes than required to meet the 1% minimum outage requirement. Applying these findings show that there are simple methods that can be applied to improve the safety of HAZMAT transport by rail. For example, shipping HAZMAT commodities in tank cars that are larger in volume than required based on the minimum 1% outage requirement and gross rail load (GRL) limit, will reduce releases and increase safety.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Pinzón Rueda, Wilson Alexánder, Sonia Alexandra Jaimes Suárez y Fidel Andrés Olarte Bustos. "Ética, sesgos, falacias y selección metodológica. Un esquema para ingeniería industrial". En Nuevas realidades para la educación en ingeniería: currículo, tecnología, medio ambiente y desarrollo. Asociación Colombiana de Facultades de Ingeniería - ACOFI, 2022. http://dx.doi.org/10.26507/paper.2167.

Texto completo

Resumen

La ética en ingeniería orienta la conducta profesional de ingeniería en modo correcto para los otros y las organizaciones industriales, según lo indican los principios ABET. La evaluación criteriosa de metodologías y la identificación de fuentes y tipos de sesgos, falacias y la correcta elección metodología son de interés en la ética en la ingeniería. La presente propuesta identifica dos marcos de selección metodológica en intervenciones en las que se utilizan las técnicas de ingeniería industrial y metodología de la investigación. La selección de métodos, técnicas, modelos en ingeniería industrial se aprende en medio de marcos teóricos que omiten frecuentemente al menos tres fuentes de sesgo, los psicológicos, sociales y metodológicos. Kanheman, Sibony y Sunstein describen el efecto del sesgo de carácter individual en la forma en la cual los jueces emiten sus juicios dentro de los procesos judiciales y el efecto de los sesgos y los prejuicios en sus procesos y decisiones finales. Richard Thaler Identifica las diferencias entre los supuestos de la teoría económica y la forma en la cual las personas seleccionan sus acciones. Los ganadores del Premio Nobel de economía 2021 David Card, Joshua Angrist y Guido Imbens, lo obtienen al identificar el comportamiento de los mercados laborales fuera de los supuestos más frecuentemente usados desde la ideología neoclásica de que la reducción de los salarios mínimos aumenta la contratación de empleos o mano de obra. Michael Jackson propone un marco para la clasificación de intervenciones en ingeniería y en las ciencias de la administración; Para clasificar las técnicas él usa dos ejes que en palabras de Churchman estas características son: ser técnicamente factibles y culturalmente deseables. La dificultad técnica y la teoría de los intereses constitutivos de Habermas que describen las relaciones de poder. Xavier Vargas propone un marco para la Investigación: el usa dos criterios: La postura epistemológica y el grado de triangulación entre la cualificación y cuantificación del método. Nova propone un marco para la descripción de las metodologías de intervención o las de ingeniería desde el enfoque de sistemas. Aquí se propone comparar y equiparar los conceptos de la postura epistemológica y la teoría de los intereses constitutivos de Habermas, con lo que se obtiene un espacio de tres dimensiones para seleccionar entre las metodologías de investigación e intervención.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Pérez García, Juan Carlos. "HISTORIETAS FOTOGRÁFICAS: ALGUNOS USOS DE LA FOTOGRAFÍA EN EL CÓMIC". En V Congreso Internacional de Investigacion en Artes Visuales ANIAV 2022. RE/DES Conectar. València: Editorial Universitat Politècnica de València, 2022. http://dx.doi.org/10.4995/aniav2022.2022.15468.

Texto completo

Resumen

Las relaciones entre cómic y fotografía puede rastrearse hasta elsiglo XIX, con casos como el del pionero del cómic estadounidense A.B. Frost. En 1878, Frost entró en la Academia de Bellas Artes dePennsylvania para estudiar con el pintor Thomas Eakins, cuando esteúltimo estaba interesado en incorporar a las artes plásticas losavances de las series fotográficas de Eadweard Muybridge. Los primeros cómics de Frost fueron un desarrollo humorístico en dibujos de la imagen en movimiento que había aprendido en las series fotográficas de Muybridge como parte del entorno de Eakins (Smolderen 2014: 120).Existen ejemplos recientes de uso directo de la fotografía en el cómiccomo Le photographe (Lefèvre, Guibert y Lemercier, 2003-2006), novela gráfica construida a partir de las fotografías y recuerdos delreportero gráfico Didier Lefèvre sobre una expedición de Médicos SinFronteras en el Afganistán de 1986. Su testimonio sobre los desastresde la guerra afgano-soviética se representa en las viñetas dibujadaspor Guibert. Pero entre ellas se interpolan las fotografías de Lefèvre(que remiten a la fotonovela, sin serlo realmente), la huella indicialy “objetiva” de que aquello sucedió realmente. El contraste implica unchoque entre la invención que implica todo dibujo y el index de larealidad, el “Esto ha sido” (Barthes 2006: 91) como noema de lafotografía.Esta propuesta analizará (mediante herramientas de Historia del arte,Estética y Bellas artes) diversos cómics de producción del autor dondeempleó fotocollages y dibujo. Los principales referentes inspiradoresfueron Le photographe y dos novelas gráficas de Eddie Campbell, TheFate of the Artist (2006) y The Lovely Horrible Stuff (2012).Referencias bibliográficas:Barthes, Roland (2006), La cámara lúcida, Barcelona: Paidós.Smolderen, Thierry (2014): The Origins of Comics: From William Hogarth to Winsor McCay, Jackson: University Press of Mississippi.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Sun, Wei, Guangqing Zhang, Xiaojia Xue y Wenbin Chen. "Rock Tensile Properties and Modification of Tensile Strength Criterion Under Confining Pressure". En 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0587.

Texto completo

Resumen

ABSTRACT To reveal the influence of confining pressure on the tensile properties of rock, Brazilian disc tests for tight sandstone and granite under different confining pressures were carried out. The tensile failure characteristics were analyzed, and the tensile strength-confining pressure curves were obtained. The maximum tensile stress criterion was modified considering the influence of confining pressure, which was incorporated into ABAQUS, and characteristics of hydraulic fractures under different in-situ stress conditions were studied. The results reveal that (1) under the confining pressure of 0-25 MPa, the failure mode of tight sandstone changes from tensile failure to tensile-shear failure, while granite only exhibits tensile failure; (2) under the tensile failure mode, the relationship between tensile strength and confining pressure is linear, and the confining pressure has a more significant influence on granite; (3) the modified maximum tensile stress criterion is expressed as multiple sets of nested vertical planes in the principal stress space; (4) ignoring the influence of confining pressure on tensile strength, the breakdown pressure is underestimated, the fracture length is overestimated, and the maximum fracture width is underestimated. INTRODUCTION The tensile failure of rocks in hydraulic fracturing occurs under the in-situ stress environment, which belongs to confined tensile failure (Chen et al., 2023). Conventional rock tensile tests have gradually expanded to confined rock tensile tests. The confined direct tensile test is an experimental method in which the specimen is directly tensioned under confining pressure. You et al. (2006) conducted direct tensile tests under confining pressure by bonding the cylindrical specimen to the squeeze head. The results showed that the tensile strength decreases with the increase of confining pressure, and the Griffith criterion in the tensile stress region is not valid for rocks. However, the failure surfaces were not in the middle of the test piece, but closer to the end. Liu et al. (2019) compared the results of triaxial tension and triaxial compression tests of cylindrical sandstone specimens. It is considered that confining pressure can improve the compressive strength of sandstone and reduce its tensile strength, and the impact on the former is greater than the latter. Because of the uncertainty of the failure section of the cylindrical specimen, the direct tensile tests of the dog-bone specimen were carried out (Ma et al., 2018; Lan et al., 2019; Tarokh et al., 2022). Compared with the cylindrical specimen, the sections of the dog-bone specimen are primarily located in the middle of the specimen. With the increase of the confining pressure, the specimen section gradually inclines. The failure mode transits from tensile failure to tension-shear failure. The confined hollow cylinder tensile test is an experimental method of obtaining tensile strength by hydraulic fracturing. A significant positive correlation between rock tensile strength and confining pressure (Zhang et al., 2020; Li et al., 2019). Li et al. (2019) indicated that increasing confining pressure can decrease rock brittleness, enhance its toughness, and increase the energy required for microcracks to continue expanding. This results in an increase in macroscopic tensile strength and fracture toughness of rocks. The confined Brazilian disc test is widely used to obtain tensile strength indirectly. Mighani et al. (2015) suggested that confining pressure hinders the nucleation of microfractures, resulting in an increase in tensile strength as the confining pressure increases. Li et al. (2020) obtained the tensile failure envelope through multistage Brazilian disc tests on sandstone. Li et al. (2018) used the copper jacket to wrap Brazilian disc specimens to isolate fluid and rock. The experimental results indicate that the inclination of the failure surface increases with the increase of confining pressure, and the failure mode changes from tensile failure (low confining pressure) to shear failure (high confining pressure). Hagengruber et al. (2021) demonstrated an increase in the intermediate principal stress can significantly enhance the strength of sandstone, and as the confining pressure increases, the characteristics of shear failure gradually become more apparent. Wu et al. (2016) indicated the dynamic tensile strength increased with the increase of the confining pressure. Moreover, under equivalent levels of confining pressure, the dynamic tensile strength of rock increases with the loading rate.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ofrecemos descuentos en todos los planes premium para autores cuyas obras están incluidas en selecciones literarias temáticas. ¡Contáctenos para obtener un código promocional único!