Academic literature on the topic 'Stunning. eng'

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Journal articles on the topic "Stunning. eng"

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Zulkifli, I., Y. M. Goh, B. Norbaiyah, et al. "Changes in blood parameters and electroencephalogram of cattle as affected by different stunning and slaughter methods in cattle." Animal Production Science 54, no. 2 (2014): 187. http://dx.doi.org/10.1071/an12128.

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The present study aimed to provide a comparative analysis of the effects of penetrative stunning, non-penetrative stunning and post-slaughter stunning on biochemical parameters and electroencephalogram (EEG) associated with stress in heifers and steers. Ten animals were assigned to each of the following four treatment groups: (1) animals were subjected to conventional halal slaughter (a clean incision through the structures on the ventral neck at the approximate level of vertebrae C2–C3 – the trachea, oesophagus, carotid arteries and jugular veins) and post-cut penetrating mechanical stun with
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Végh, Ákos, Zsolt Abonyi-Tóth, and Pál Rafai. "Effect of current intensity and duration on the effectiveness of head-only electrical stunning in pigs under commercial conditions." Acta Veterinaria Hungarica 65, no. 1 (2017): 13–28. http://dx.doi.org/10.1556/004.2017.002.

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After head-only electrical stunning of pigs sequential animal-based measurements were carried out right after stunning as well as before and after bleeding in order to analyse how unconsciousness is achieved and maintained in relation to recorded and calculated technical parameters such as electric current intensity, electric work, duration of stunning, and stun-to-bloodletting period. The measurements were performed at three different slaughterhouses on 9 different days under routine slaughtering conditions. The data of 405 pigs were analysed. The effectiveness of stunning was measured by the
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Wotton, Steve, Andrew Grist, Mike O’Callaghan, and Ed van Klink. "Head-Only Stunning of Turkeys Part 2: Subjective and Objective Assessment of the Application of AC and DC Waveforms." Animals 11, no. 2 (2021): 286. http://dx.doi.org/10.3390/ani11020286.

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Electrical stunning is likely to remain an important stunning method for turkeys at slaughter. The purpose of this study is to understand the application of various waveforms of alternating current (AC) and pulsed direct currents (DC), head-only, to turkeys and to improve the effectiveness of handheld stunning of turkeys. We evaluated the effectiveness of stunning by documenting physical responses and recording electroencephalograms (EEGs). For the assessment of physical responses, the stunning voltage was varied depending on the proportion of animals effectively stunned at a certain voltage l
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Trines, Serge A. I. P., Cornelis J. Slager, Joost Van der Moer, Pieter D. Verdouw, and Rob Krams. "Efficiency of energy transfer, but not external work, is maximized in stunned myocardium." American Journal of Physiology-Heart and Circulatory Physiology 279, no. 3 (2000): H1264—H1273. http://dx.doi.org/10.1152/ajpheart.2000.279.3.h1264.

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There is no evidence regarding the effect of stunning on maximization of regional myocardial external work (EW) or efficiency of energy transfer (EET) in relation to regional afterload (end-systolic stress, ςes). To that end, we studied these relationships in both the left anterior descending coronary artery (LADCA) and left circumflex coronary artery regions in anesthetized, open-chest pigs before and after LADCA stunning. In normal myocardium, EET vs. ςes was maximal at 75.4 (69.7–81.0)%, whereas EW vs. ςes was submaximal at 12.0 (6.61–17.3) × 102 J/m3. Increasing ςes increased EW by 18 (10–
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Fan, Dongsheng, Loe Kie Soei, Rene Stubenitsky, et al. "Contribution of asynchrony and nonuniformity to mechanical interaction in normal and stunned myocardium." American Journal of Physiology-Heart and Circulatory Physiology 273, no. 5 (1997): H2146—H2154. http://dx.doi.org/10.1152/ajpheart.1997.273.5.h2146.

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In anesthetized pigs, we investigated whether asynchrony (Δ T) and nonuniformity (regional differences) in contractility (Δ E) could describe the interaction between normal and stunned myocardium. Mechanical interaction was evaluated by regional postsystolic work (PSW) before and after production of stunning by a 5-min occlusion of the left circumflex coronary artery [LCX (LCX stunning)] and a subsequent 10-min occlusion of the left anterior descending coronary artery [LAD (LAD stunning)]. Δ T and Δ E were intensified by intracoronary (LAD) infusions of dobutamine. From regional end-systolic p
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Bolli, Roberto, and Eduardo Marbán. "Molecular and Cellular Mechanisms of Myocardial Stunning." Physiological Reviews 79, no. 2 (1999): 609–34. http://dx.doi.org/10.1152/physrev.1999.79.2.609.

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The past two decades have witnessed an explosive growth of knowledge regarding postischemic myocardial dysfunction or myocardial “stunning.” The purpose of this review is to summarize current information regarding the pathophysiology and pathogenesis of this phenomenon. Myocardial stunning should not be regarded as a single entity but rather as a “syndrome” that has been observed in a wide variety of experimental settings, which include the following: 1) stunning after a single, completely reversible episode of regional ischemia in vivo; 2) stunning after multiple, completely reversible episod
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Borzuta, Karol, Dariusz Lisiak, Piotr Janiszewski, and Eugenia Grześkowiak. "The Physiological Aspects, Technique and Monitoring of Slaughter Procedures and their Effects on Meat Quality – A Review." Annals of Animal Science 19, no. 4 (2019): 857–73. http://dx.doi.org/10.2478/aoas-2019-0039.

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AbstractThe aim of the paper was a review of the scientific achievements in physiological stunning and slaughtering mechanisms, control methods of consciousness and their effect on meat quality. Special attention was paid to neurophysiological phenomena that accompany the process of depriving consciousness before animal deaths using mechanical, electrical and gas stunning methods. These mechanisms are associated with cerebral hypoxia or ischemia or depolarization, acidification and the destruction of cerebral neurons. Such effects can be caused by shock waves, bleeding, electric fields, reduct
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Végh, Ákos, Zsolt Abonyi-Tóth, and Pál Rafai. "Verification of the technical parameters of head-only electrical stunning of pigs under commercial conditions." Acta Veterinaria Hungarica 58, no. 2 (2010): 147–56. http://dx.doi.org/10.1556/avet.58.2010.2.1.

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The European Food Safety Authority recommends a minimum current of 1.3 Amps for the electrical head-only stunning of pigs. However, it is stated as well that ‘the technical reference data for head-only electrical stunning of pigs such as 1.3 Amps are either rather old or worked out under experimental laboratory conditions’. This study was carried out to verify the electrical parameters of pig stunning under commercial conditions. Altogether 145 fattener pigs (body weight range: 30–150 kg, median 109 kg) were tested at four different private slaughterhouses in Hungary where head-only electrical
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Takano, Hitoshi, Xian-Liang Tang, and Roberto Bolli. "Differential role of KATP channels in late preconditioning against myocardial stunning and infarction in rabbits." American Journal of Physiology-Heart and Circulatory Physiology 279, no. 5 (2000): H2350—H2359. http://dx.doi.org/10.1152/ajpheart.2000.279.5.h2350.

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The role of ATP-sensitive potassium (KATP) channels in the late phase of ischemic preconditioning (PC) remains unclear. Furthermore, it is unknown whether KATP channels serve as end effectors both for late PC against infarction and against stunning. Thus, in phase I of this study, conscious rabbits underwent a 30-min coronary occlusion (O) followed by 72 h of reperfusion (R) with or without ischemic PC (6 4-min O/4-min R cycles) 24 h earlier. Late PC reduced infarct size ∼46% versus controls. The KATPchannel blocker 5-hydroxydecanoic acid (5-HD), given 5 min before the 30-min O, abrogated the
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Lee, Shinyu, Junichi Araki, Takeshi Imaoka, et al. "Energy-wasteful total Ca2+ handling underlies increased O2 cost of contractility in canine stunned heart." American Journal of Physiology-Heart and Circulatory Physiology 278, no. 5 (2000): H1464—H1472. http://dx.doi.org/10.1152/ajpheart.2000.278.5.h1464.

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Postischemic myocardial stunning halved left ventricular contractility [end-systolic maximum elastance ( E max)] and doubled the O2 cost of E max in excised cross-circulated canine heart. We hypothesized that this increased O2 cost derived from energy-wasteful myocardial Ca2+ handling consisting of a decreased internal Ca2+ recirculation, some futile Ca2+ cycling, and a depressed Ca2+ reactivity of E max. We first calculated the internal Ca2+ recirculation fraction (RF) from the exponential decay component of postextrasystolic potentiation. Stunning significantly accelerated the decay and decr
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Dissertations / Theses on the topic "Stunning. eng"

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Neves, Julia Eumira Gomes. "Influências de métodos de abate no bem-estar e na qualidade da carne de bovinos /." Jaboticabal : [s.n.], 2008. http://hdl.handle.net/11449/96581.

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Resumo: A finalidade da insensibilização é deixar os animais inconscientes, para que não sofra dor ou aflição durante a degola. O objetivo deste estudo foi avaliar os efeitos de três métodos de abate de bovinos no seu bem-estar e na qualidade da carne. Para a avaliação da eficiência de atordoamento, de seus efeitos na degola e no bem-estar dos bovinos foram testados três métodos de abate/atordoamento: pistola de dardo cativo com penetração (abate1), pistola de dardo cativo sem penetração (abate2) e sem atordoamento (abate3). A posição e o número de disparos nas cabeças dos animais foram medido
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Books on the topic "Stunning. eng"

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Waitz, J. P. God's End-Time Man: The Stunning Significance of Herbert W. Armstrong. 1st Books Library, 2000.

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Eggs--150 Fabulous Recipes: The Definitive Guide To Egg Cooking, Shown In More Than 800 Stunning Step-By-Step Photographs To Guide & Inspire. Lorenz Books, 2007.

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Reffelmann, Thorsten, and Robert Kloner. Adjunctive Reperfusion Therapy Post-AMI. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199544769.003.0009.

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• Reperfusion of the occluded coronary artery in an ST-segment-elevation myocardial infarction is the most effective approach for reducing infarct size, preserving left ventricular ejection fraction, lowering the incidence and severity of congestive heart failure and improving prognosis• Hence, several pharmacologic agents intended to improve target vessel patency as an adjunct to thrombolysis or primary percutaneous coronary intervention have been shown to be beneficial in patients with reperfusion therapy for acute myocardial infarction, namely antiplatelet and anticoagulation agents• Animal
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Richards, Greg, Les Hall, and Steve Parish. Natural History of Australian Bats. CSIRO Publishing, 2012. http://dx.doi.org/10.1071/9780643103757.

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To hold a little microbat in your hand, its body the size of the end of your thumb, is nothing but astounding. Its head is nearly the size of a man’s fingernail, its tiny ears are twitching as it struggles to get free, and then it bares its teeth to try and scare you into letting it go. Inside that tiny head is a powerhouse of information. Some of our little bats know the entire landscape of our east coast, and can pinpoint a cave entrance in dense forest 500 km from its last home. When they get there they know what to do – where to forage, which bat to mate with and how to avoid local predato
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Cleave, Rohan, and Coral Tulloch. Phasmid. CSIRO Publishing, 2015. http://dx.doi.org/10.1071/9781486301133.

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Phasmid is the amazing true story of the Lord Howe Island Phasmid, or Stick Insect. Believed to be extinct for nearly 80 years, the phasmids were rediscovered on Balls Pyramid, a volcanic outcrop 23 kilometres off the coast of Lord Howe Island, Australia. News of their unbelievable survival made headlines around the world and prompted an extraordinary conservation effort to save this remarkable invertebrate. 
 
 This wonderful tale captures the life of one of the world's most critically endangered invertebrates, from beginning life as an egg to surviving harsh environments and the ho
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Laland, Kevin N. Darwin's Unfinished Symphony. Princeton University Press, 2018. http://dx.doi.org/10.23943/princeton/9780691182810.001.0001.

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Humans possess an extraordinary capacity for cultural production, from the arts and language to science and technology. How did the human mind—and the uniquely human ability to devise and transmit culture—evolve from its roots in animal behavior? This book presents a new theory of human cognitive evolution. It reveals how culture is not just the magnificent end product of an evolutionary process that produced a species unlike all others—it is also the key driving force behind that process. The book shows how the learned and socially transmitted activities of our ancestors shaped our intellects
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Schwitter, Juerg, and Jens Bremerich. Cardiac magnetic resonance in the intensive and cardiac care unit. Oxford University Press, 2015. http://dx.doi.org/10.1093/med/9780199687039.003.0023.

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Current applications of cardiac magnetic resonance offer a wide spectrum of indications in the setting of acute cardiac care. In particular, cardiac magnetic resonance is helpful for the differential diagnosis of chest pain by the detection of ischaemia, myocardial stunning, myocarditis, and pericarditis. Also, Takotsubo cardiomyopathy and acute aortic diseases can be evaluated by cardiac magnetic resonance and are important differential diagnoses in patients with acute chest pain. In patients with restricted windows for echocardiography, according to guidelines, cardiac magnetic resonance is
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Schwitter, Juerg, and Jens Bremerich. Cardiac magnetic resonance in the intensive and cardiac care unit. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199687039.003.0023_update_001.

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Current applications of cardiac magnetic resonance offer a wide spectrum of indications in the setting of acute cardiac care. In particular, cardiac magnetic resonance is helpful for the differential diagnosis of chest pain by the detection of ischaemia, myocardial stunning, myocarditis, and pericarditis. Also, Takotsubo cardiomyopathy and acute aortic diseases can be evaluated by cardiac magnetic resonance and are important differential diagnoses in patients with acute chest pain. In patients with restricted windows for echocardiography, according to guidelines, cardiac magnetic resonance is
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Schwitter, Juerg, and Jens Bremerich. Cardiac magnetic resonance in the intensive and cardiac care unit. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780199687039.003.0023_update_002.

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Current applications of cardiac magnetic resonance offer a wide spectrum of indications in the setting of acute cardiac care. In particular, cardiac magnetic resonance is helpful for the differential diagnosis of chest pain by the detection of ischaemia, myocardial stunning, myocarditis, and pericarditis. Also, Takotsubo cardiomyopathy and acute aortic diseases can be evaluated by cardiac magnetic resonance and are important differential diagnoses in patients with acute chest pain. In patients with restricted windows for echocardiography, according to guidelines, cardiac magnetic resonance is
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Book chapters on the topic "Stunning. eng"

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Perera, Divaka, and Simon Redwood. "Percutaneous coronary intervention in patients with impaired left ventricular function." In Oxford Textbook of Interventional Cardiology. Oxford University Press, 2010. http://dx.doi.org/10.1093/med/9780199569083.003.017.

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Changes in left ventricular (LV) function are an early manifestation of the ischaemic cascade and often precede the well-recognized markers of ischaemia, such as ST segment changes or chest pain. Decreased ventricular compliance, diminished regional and global contractility, and elevated end-diastolic pressure occur within a few seconds of interruption of coronary blood flow by balloon occlusion, whereas recovery of these parameters can lag several minutes behind balloon deflation, restoration of blood flow, and resolution of electrocardiogram (ECG) changes. Prolonged postischaemic myocardial dysfunction, or stunning, can occur following recurrent ischaemia, which may persist for several hours or days even when blood flow is restored. The impact of transient or repetitive coronary occlusion on LV function is rarely of clinical consequence when percutaneous coronary intervention (PCI) is performed in patients with preserved ventricular function, but is potentially hazardous in those who have LV impairment at the outset, particularly when there is a large amount of myocardium at risk. These patients have attenuated haemodynamic reserve and may recover incompletely from post-ischaemic stunning, which increases the risk of entering a deteriorating spiral of decreasing cardiac output and worsening ischaemia that could culminate in cardiogenic shock or ventricular arrhythmias. Furthermore, patients with impaired LV function tend to be older and have more advanced comorbidities, which are independently associated with an adverse outcome following any form of revascularization.
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Stein, Michael D., and Sandro Galea. "Maybe the End of HIV." In Pained. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780197510384.003.0047.

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This chapter focuses on HIV, which has been our most politically charged illness and a defining health challenge of our time. The world of HIV care over the last two decades has seen a great, almost miraculous, revolution. Today, a 35-year-old who was HIV-infected in 2018 and takes her daily medication adherently has the life expectancy of a 35-year-old without HIV infection. Monthly injections of long-acting HIV drugs look to be as good as daily pills at suppressing the virus, creating easier treatment. Despite these stunning advances, disparities in detection and care characterize the disease. The epidemic has shifted to groups that are hard to test, hard to get started on preventive care, and hard to keep on daily medication—persons who inject stimulants, men on the down-low, the mentally ill, the homeless, and the rural poor with no health insurance. Lack of information, lack of trust of providers, unfamiliarity with services, and refusals of testing and treatment due to social rejection and privacy concerns make the delivery of care more challenging for these groups. Even among persons enrolled in AIDS clinical trials who have found their way to cutting-edge medical treatment, blacks and Hispanics have poorer outcomes. As such, reaching an end to HIV will require new attention to health systems and social stigma, to geography, to housing and outreach, to the long work of public health.
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Kumar, Pankaj, Lokesh Chouhan, and Ankit Songara. "Cloud- and IoT-Powered Smart Connected Cities." In Advances in Civil and Industrial Engineering. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-6207-8.ch004.

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The internet of things (IoT) is rising at a stunning rate. Consistently, every day, the presence of new gadgets, cameras, cell phones, and sensors these are associated with the internet. It is envisioned IoT will find, coordinate, and make utilization of such gadgets and their information in the advance of new service and items that can change and emphatically blow our lives. Presently, IoT and cloud computing are the hottest area used by the researchers. In any case, to the best of the authors' insight, these works do not have a point-by-point investigation of the new Cloud-IoT worldview, which includes totally new applications, challenges, and research issues. To connect this hole, this chapter gives a review on the reconciliation of Cloud and IoT. Beginning by describing basics of both IoT and cloud computing, the authors examine their complementarity, itemizing what is at present heading to their integration. At the end this chapter, the authors describe the smart roadside assistance for smart communities.
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Holden Reid, Brian. "Over the Chattahoochee, May–July 1864." In The Scourge of War. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780195392739.003.0012.

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This chapter assesses how, in the closing weeks of May of 1864, William T. Sherman encountered a problem that had perplexed all successful commanders: how to complete a devastating pursuit. In particular, he needed to figure out how to prevent the escape of an enemy that might seek refuge in another position as formidable as the one previously vacated. With the Crossing of the Chattahoochee River, virtually without loss, Sherman brought this phase of the campaign to an end with a stunning feat for which he has received insufficient credit. There is one cardinal rule for river crossings, as for amphibious landings—cross or land where the enemy is not. In some ways, Sherman’s achievement is even more impressive than Ulysses S. Grant’s Crossing of the James the previous month, because of the close proximity of the enemy determined to resist his forays and superior in cavalry. Sherman out-thought and out-maneuvered Joseph E. Johnston. And for once, in this series of intricate movements, his cavalry played a creditable role.
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Page, Max. "The City’s End Past and Present Narratives of New York’s Destruction." In The Resilient City. Oxford University Press, 2005. http://dx.doi.org/10.1093/oso/9780195175844.003.0008.

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There were two phrases spoken over and over again on September 11, 2001, and in the weeks and months following: “It was unimaginable” and, in an apparent contradiction, “It was just like a movie.” The sight of the twin towers falling was, in fact, both: utterly incomprehensible for New Yorkers and Americans of today and, at the same time, wholly recognizable to our well-trained popular-culture imaginations. If the first phrase was an accurate accounting of our daily experience, the second was an accurate statement of what we see when we turn on the television or go to a movie. Americans have been imagining New York’s destruction for two centuries. America’s writers and image makers have visualized New York’s annihilation in a stunning range of ways. Imagining New York’s destruction has not been the purview only of artists and novelists, but also a common narrative, inscribed in the daily world of newspapers and television shows, computer programs, and music albums. The images are pervasive and disturbing, but largely unstudied. Looking back, into New York’s history, we need to understand how and why American culture has so readily and so creatively narrated the city’s end, before 9/11 and after. Cultural forms express and reproduce social experience. It might not be surprising, then, that a leitmotif of American popular culture of the last 200 years has been the imagining of New York’s destruction. The United States is a deeply religious nation; students of American history need constantly to be reminded that the United States remains the most religious of Western industrialized nations. The country has exhibited a strong apocalyptic strain that has not been hard to translate into popular culture. But these visions of the city’s destruction stem in part from the real, lived experience of New Yorkers—their lives and the life of the city have been powerfully and permanently shaped by very real destruction and rebuilding. The specific fantasies and premonitions of New York’s destruction have followed the fears of the city’s people. Some of those fears were built on real experiences—a series of natural disasters, as well as what I have called the city’s relentless creative destruction—that have led New Yorkers to believe that, despite the dominance of their city in the nineteenth and twentieth centuries, the mighty city is fragile.
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Liu, Yu. "Resemioticization of Periodicity: A Social Semiotic Perspective." In Mendeleev to Oganesson. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190668532.003.0012.

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Chemical periodicity is arguably one of the most important ideas in science, and it has profoundly influenced the development of both modern chemistry and physics (Scerri 1997, 229). While the definition of periodicity has remained largely stable in the past 150 years, the periodic system has been visualized in a wide range of forms including (to name just a few) tables, spirals, and zigzags. Furthermore, information technology makes it much easier, and offers innovative ways, to produce new versions of periodic depictions (e.g., WebElements (Winter 1993)). The multitude of periodic visualizations arouses growing interest among scholars with different academic backgrounds. For instance, educational researchers and practitioners (e.g., Waldrip et al. 2010) wrestle with the question of which visual representation will most effectively help students master the subject content of periodicity. Likewise, philosophers tend to identify the ultimate display of the periodic system, which they use as evidence to support a realistic view of periodicity (Scerri 2007, 21). Other researchers, however, take a different attitude toward the stunning diversity of periodic depictions. In a seminal paper, Marchese (2013) examines the visualization of periodicity at different stages of history from the perspectives of tabular, cartographic, and hypermedia design. His analysis illuminates the periodic table’s plasticity and endeavors to justify the constant transformation of the periodic displays as a necessary means to meet scientists’ changing needs. While all these studies generally emphasize the importance of periodic depictions in scientific research and education, they tend to give primacy to the notion of “periodic system.” By contrast, the periodic table seems to play a secondary role, which either passively reflects the chemical law or responds to the evolving knowledge of chemical elements. Such a view runs the risk of underestimating the significant function of the periodic table as a productive research tool, one which enabled Mendeleev to successfully predict the existence and the properties of undiscovered elements such as germanium in 1869 (Kibler 2007, 222). It is important to note that science and technology are “both material and semiotic practices” (Halliday 1998, 228, italics in original).
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Verschuur, Gerrit L. "Something about Comets." In Impact! Oxford University Press, 1996. http://dx.doi.org/10.1093/oso/9780195101058.003.0007.

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Discovery of the iridium layer in the K/T boundary clay was the first clue that pointed to a cosmic impact as the trigger of the mass extinction that wiped out the dinosaurs and their associates. But what hit the earth? Was it an asteroid or a comet? To answer, we need to know something about their differences. Unfortunately, the distinction is very blurred. Comets are thought to be huge icy objects, probably with cores made of a mix of water ice and silicates (sandy material), pristine examples of the type of material out of which the solar system was formed. Some of them are hundreds of kilometers in size and they may have been built in the envelopes of gas and dust that surround cool, supergiant stars at the end of their lives. Part of the doubt about distinctions comes from trying to decide what a comet would be like after the ice evaporates. Would it then be like an asteroid? Around the end of the nineteenth century the British astronomer Sir Richard Gregory pictured comets as made up of a cloud of meteorites. He thought that when such an object was first pulled into the solar system from interstellar space it began to glow because of internal heat created as particles began to jostle one another. As the object drew closer to the sun a tail was supposed to be formed as the particles between the meteorites bumped into one another and began to escape. He did consider the potential risk to earth if it were to run into the head of a comet made up of lots of meteorites. The picture he painted was based on what an earlier astronomer, Sir Simon Newcomb, had written about this possibility. Newcomb admitted that, although there were more likely ways to die than as a result of comet collision, such a fate was real. Should such a collision, occur, Gregory conjured up a picture of what might happen. On the one hand, if the comet head was made up of dust, the earth’s inhabitants would experience nothing more than a stunning display of shooting stars. But if the comet head was made of cannonball sized objects the consequences would be dire.
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Hal, Stephen S. "Human Cloning and Stem Cells." In A Field Guide for Science Writers. Oxford University Press, 2005. http://dx.doi.org/10.1093/oso/9780195174991.003.0036.

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Of the countless interviews I have conducted with scientists over the years, only once has a question prompted something of a striptease. In December of 1999, I found myself in the elegant parlor of the Union Club in New York City, chatting with a biologist named Leonard Hayflick. Although hardly a household name to the general public, Hayflick is that rare scientist whose name is permanently attached to a biological phenomenon. It is known as the “Hayflick limit,” and it derives from experiments he did in the late 19505 and early 19605 showing that human cells grown in Petri dishes will predictably replicate for a certain number of cell divisions, but then hit a wall and stop dividing. This has obvious implications for cell biology, aging, and immortality (of the in vitro sort), and indeed the Hayflick limit has been the seed around which a spirited biological debate about the biology of aging has swirled, without definitive resolution, for about four decades now. Because of this history, Hayflick has closely followed the recent work on the biology of aging and regenerative medicine, which in turn has made him a front-row spectator in the more recent controversies involving human embryonic stem cell research and “therapeutic cloning.” At the time of my conversation with Hayflick, his longtime friend Michael West was attempting to obtain human embryonic stem cells through cloning—in a particularly controversial way, by putting human cells into egg cells from ... cows. Almost as an aside, I asked Hayflick what he thought about West's experiments. Hayflick replied by rolling up his pants leg. He bared enough skin to be able to point out a tiny dimple on his right knee. “The human cells he's using for the cow work came from here,” he said. I had to stand up and lean over to see it, but there was undeniably a tiny divot in Hayflick's skin. The implications were stunning: Leonard Hayflick, the father of cellular senescence and one of the elder statesmen of gerontology, was allowing himself, in a manner of speaking, to be cloned. In addition to making the obvious point that even the most innocuous question can elicit a startling answer, Hayflick's reply offered another lesson, too: that colorful characters can provide a narrative thread for bringing a controversy to life.
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Conference papers on the topic "Stunning. eng"

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Mason, A., Elisiv Tolo, and H. A. Haga. "Non-invasive EEG measurement during electrical stunning of sheep." In 2017 Eleventh International Conference on Sensing Technology (ICST). IEEE, 2017. http://dx.doi.org/10.1109/icsenst.2017.8304475.

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