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Journal articles on the topic 'Mode of Operations of Coke Drums'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Li, Yaoyu, Jie Bao, and Runyu Yang. "Acoustic signals of rotating drums generated based on DEM simulations." EPJ Web of Conferences 249 (2021): 14019. http://dx.doi.org/10.1051/epjconf/202124914019.

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Acoustic emission (AE) or vibration signal has been applied in detecting operations of grinding mills in many industries. This paper proposes an approach to generate AE signals based on the particle-wall impacts. Through a combination of multi-mode vibrations and the calibration of the key parameters, the model was able to reproduce experimental data. The AE model was then implemented into a discrete element method (DEM) modelling of particle flow in a rotating mill. The AE signals of the mill under different filling levels and rotation speeds were generated and analysed, mainly focusing on th

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2

Ilyas, Muhammad, Muhammad Fasih Uddin Butt, Muhammad Bilal, Khalid Mahmood, Ali Khaqan, and Raja Ali Riaz. "A Review of Modern Control Strategies for Clinical Evaluation of Propofol Anesthesia Administration Employing Hypnosis Level Regulation." BioMed Research International 2017 (2017): 1–12. http://dx.doi.org/10.1155/2017/7432310.

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Regulating the depth of hypnosis during surgery is one of the major objectives of an anesthesia infusion system. Continuous administration of Propofol infusion during surgical procedures is essential but it unduly increases the load of an anesthetist working in a multitasking scenario in the operation theatre. Manual and target controlled infusion systems are not appropriate to handle instabilities like blood pressure and heart rate changes arising due to interpatient and intrapatient variability. Patient safety, large interindividual variability, and less postoperative effects are the main fa

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3

Portela, César. "Clinical Needs as a Starting Point for Different Strategies in Computational Drug Development." Drug Research 69, no. 08 (2018): 458–66. http://dx.doi.org/10.1055/a-0820-9278.

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AbstractTraditionally, the first step in the development of drugs is the definition of the target, by choice of a biological structure involved in a disease or by recognition of a molecule with some degree of a biological activity that presents itself as druggable and endowed with therapeutic potential. The complexity of the pathophysiological mechanisms of disease and of the structures of the molecules involved creates several challenges in this drug discovery process. These difficulties also come from independent operation of the different parts involved in drug development, with little inte

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4

Magliocca, Nicholas R., Kendra McSweeney, Steven E. Sesnie, et al. "Modeling cocaine traffickers and counterdrug interdiction forces as a complex adaptive system." Proceedings of the National Academy of Sciences 116, no. 16 (2019): 7784–92. http://dx.doi.org/10.1073/pnas.1812459116.

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Counterdrug interdiction efforts designed to seize or disrupt cocaine shipments between South American source zones and US markets remain a core US “supply side” drug policy and national security strategy. However, despite a long history of US-led interdiction efforts in the Western Hemisphere, cocaine movements to the United States through Central America, or “narco-trafficking,” continue to rise. Here, we developed a spatially explicit agent-based model (ABM), called “NarcoLogic,” of narco-trafficker operational decision making in response to interdiction forces to investigate the root cause

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5

Yamamoto, Toshiya, Kazuaki Arii, Shinta Niimoto, Mitsuru Ohata, Tetsuya Tagawa, and Fumiyoshi Minami. "Investigation of Bulging Behavior of Coke Drum—A Practical Analysis of Bulging Under Complex Quench Conditions." Journal of Pressure Vessel Technology 136, no. 6 (2014). http://dx.doi.org/10.1115/1.4027591.

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Coke drums undergo cyclic operations typically in the temperature range from room temperature to about 500 °C (930 °F). During quenching, the coke drum is inevitably subjected to a rapid drop in temperature because cooling water is injected directly into the coke drum through the bottom inlet nozzle. The temperature profile on the shell surface is uneven during quenching, and can vary in each cycle of the quenching operation. Such a complicated thermal profile induces large strains in the shell portion of the coke drum, and eventually causes damage like bulging and/or cracking. The authors hav

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6

Ju, Feng, John Aumuller, Zihui Xia, and Pierre Du Plessis. "Global and Local Elastic-Plastic Stress Analysis of Coke Drum Under Thermal-Mechanical Loadings." Journal of Pressure Vessel Technology 133, no. 6 (2011). http://dx.doi.org/10.1115/1.4002802.

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Coke drums are critical equipment in the petroleum industry. The failure modes of coke drums include excessive bulging deformation and fatigue cracking. The elastic-plastic behavior of a coke drum, subjected to both thermal and mechanical loadings, is analyzed for a complete cycle of operation. The effects of multiple operational cycles and localized hot/cold spots are also investigated. It is found that yielding of the clad layer starts at the very early stage in an operating cycle and permanent deformation is caused in the first operating cycle. Plastic shakedown occurs in the clad layer und

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7

Xia, Zihui, Feng Ju, and Pierre Du Plessis. "Heat Transfer and Stress Analysis of Coke Drum for a Complete Operating Cycle." Journal of Pressure Vessel Technology 132, no. 5 (2010). http://dx.doi.org/10.1115/1.4001208.

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Coke drums experience severe thermal and mechanical loadings during operation, and the reliability and safety of the coke drums are critical to the industry. The objective of this study is to analyze temperature and stress of the coke drum for a complete process cycle. The thermal analysis model of the coke drum is first developed incorporating appropriate boundary conditions. The heat transfer coefficients at the inner surface of the coke drum, which change with the operation stages and the levels of oil filling and water quenching, are determined based on the temperature measurement data at

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8

Ohata, Mitsuru, Nana Kawai, Tetsuya Tagawa, et al. "Investigation of Bulging Behavior of Coke Drum: Feasible Study on Causes of Bulging." Journal of Pressure Vessel Technology 136, no. 3 (2014). http://dx.doi.org/10.1115/1.4026046.

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Coke drums undergo cyclic operations typically in the temperature range from ambient temperature to about 500 °C (930 °F). During quenching, the coke drum is inevitably subjected to a rapid drop in temperature because cooling water is injected directly into the coke drum through the bottom inlet nozzle. The temperature profile on the shell surface is no more uneven in quenching, and can vary in each cycle of quenching operation. Such complicate thermal profile induces large strains in the shell portion of the coke drum, and eventually causes damage like bulging or cracking. This study makes in

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9

Hochheiser, Harry, Xia Jing, Elizabeth A. Garcia, et al. "A Minimal Information Model for Potential Drug-Drug Interactions." Frontiers in Pharmacology 11 (March 8, 2021). http://dx.doi.org/10.3389/fphar.2020.608068.

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Despite the significant health impacts of adverse events associated with drug-drug interactions, no standard models exist for managing and sharing evidence describing potential interactions between medications. Minimal information models have been used in other communities to establish community consensus around simple models capable of communicating useful information. This paper reports on a new minimal information model for describing potential drug-drug interactions. A task force of the Semantic Web in Health Care and Life Sciences Community Group of the World-Wide Web consortium engaged i

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10

Budilaksono, Agung. "ANALYSIS CUSTOMS MARITIME SURVEILLANCE SYSTEM BASED ON MOVEMENT PHENOMENON AND CHARACTERISTIC OF NARCOTICS, PRECURSORS AND PSYCHOTROPICS (NPP) SMUGGLINGS." JURNAL PERSPEKTIF BEA DAN CUKAI 4, no. 1 (2020). http://dx.doi.org/10.31092/jpbc.v4i1.772.

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ABSTRACT: The objective of this paper is to analyses how to reduce smuggling illegal goods amid the high flow of Indonesian sea traffic, analyze effective sea action measures through observing the phenomenon of NPP smuggling movements, and analyze the design of supporting facilities and human resources that can carry out the functions of ocean surveillance effectively. The type of this research is applied research with the analysis unit is Customs Maritime Surveillance System. The method of analysis used is Stufflebeam CIPP Evaluation Model. Source of data come from document studies of Directo

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11

Aslam, Afroz, Mehtab Parveen, and Kushvendra Singh. "Green synthesis of fused chromeno-pyrazolo-phthalazine derivatives with silica-supported bismuth nitrate under solvent-free condition." Current Organic Synthesis 17 (December 8, 2020). http://dx.doi.org/10.2174/1570179417666201208112520.

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Aim: To synthesize chromeno-pyrazolo[1,2-b]phthalazine-6,9,14(7H)-trione analogs with the help of silica-supported bismuth nitrate catalyst. Background: Nitrogen-containing heterocyclic compounds are widespread, and their applications to pharmaceuticals, agrochemicals, and functional materials are becoming more and more important. Pyrazoles are an important class of compounds for new drug development, as they are the core structure of numerous biologically active compounds, including blockbuster drugs such as celecoxib, viagra, pyrazofurine, and many others. Similarly, heterocycles containing

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12

Tsarouhis, Patti. "Mapping the Narrative in a Digital Album Cover." M/C Journal 9, no. 1 (2006). http://dx.doi.org/10.5204/mcj.2590.

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   When Ray Winstone’s character in the film ‘Nil by Mouth’, uses an album cover as a portable work surface to prepare drugs, what is invariably being enunciated is a narrative of generational identity. The object status of the vinyl record with its sleeves, notes, and protective sheath, appends a broader trajectory of the ‘record collection’, ‘stereo’, ‘speakers and dials’. The series of operations performed upon these raw materials whether, collecting, listening to, trading or buying second hand, creates a unique cultural form, a series of unordered items/events, which Lev

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13

Potts, Jason. "The Alchian-Allen Theorem and the Economics of Internet Animals." M/C Journal 17, no. 2 (2014). http://dx.doi.org/10.5204/mcj.779.

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Economics of Cute There are many ways to study cute: for example, neuro-biology (cute as adaptation); anthropology (cute in culture); political economy (cute industries, how cute exploits consumers); cultural studies (social construction of cute); media theory and politics (representation and identity of cute), and so on. What about economics? At first sight, this might point to a money-capitalism nexus (“the cute economy”), but I want to argue here that the economics of cute actually works through choice interacting with fixed costs and what economists call ”the substitution effect”. Cute, in

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14

Gardner, Paula. "The Perpetually Sick Self." M/C Journal 5, no. 5 (2002). http://dx.doi.org/10.5204/mcj.1986.

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Since the mid-eighties, personality and mood have undergone vigorous surveillance and repair across new populations in the United States. While government and the psy-complexes 1 have always had a stake in promoting citizen health, it is unique that, today, State, industry, and non-governmental organisations recruit consumers to act upon their own mental health. And while citizen behaviours in public spaces have long been fodder for diagnosis, the scope of behaviours and the breadth of the surveyed population has expanded significantly over the past twenty years. How has the notion of behaviou

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15

Burns, Alex. "'This Machine Is Obsolete'." M/C Journal 2, no. 8 (1999). http://dx.doi.org/10.5204/mcj.1805.

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'He did what the cipher could not, he rescued himself.' -- Alfred Bester, The Stars My Destination (23) On many levels, the new Nine Inch Nails album The Fragile is a gritty meditation about different types of End: the eternal relationship cycle of 'fragility, tension, ordeal, fragmentation' (adapted, with apologies to Wilhelm Reich); fin-de-siècle anxiety; post-millennium foreboding; a spectre of the alien discontinuity that heralds an on-rushing future vastly different from the one envisaged by Enlightenment Project architects. In retrospect, it's easy for this perspective to be dismissed as

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16

Collins, Steve. "Amen to That." M/C Journal 10, no. 2 (2007). http://dx.doi.org/10.5204/mcj.2638.

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   In 1956, John Cage predicted that “in the future, records will be made from records” (Duffel, 202). Certainly, musical creativity has always involved a certain amount of appropriation and adaptation of previous works. For example, Vivaldi appropriated and adapted the “Cum sancto spiritu” fugue of Ruggieri’s Gloria (Burnett, 4; Forbes, 261). If stuck for a guitar solo on stage, Keith Richards admits that he’ll adapt Buddy Holly for his own purposes (Street, 135). Similarly, Nirvana adapted the opening riff from Killing Jokes’ “Eighties” for their song “Come as You Are”. Mus

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17

McCosker, Anthony. "Blogging Illness: Recovering in Public." M/C Journal 11, no. 6 (2008). http://dx.doi.org/10.5204/mcj.104.

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As a mode of open access public self-expression, blogs are one form of the unfolding massification of culture (Lovink). Though widely varied in content and style, they are characterised by a reverse chronological diary-like format, often produced by a single author, and often intimately expressive of that author’s thoughts and experiences. The purpose of this paper is to explore the use of blogs as a space for the detailed and on-going expression of the day to day experiences of sufferers of serious illness. We might traditionally consider the experience of illness as absolutely private, but i

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18

Rice, Jeff. "They Put Me in the Mix." M/C Journal 4, no. 2 (2001). http://dx.doi.org/10.5204/mcj.1903.

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Cut In 1964, William S. Burroughs' Nova Express is published. Part of the trilogy of books Burroughs wrote in the early 1960s (The Soft Cell and The Ticket That Exploded are the other two), Nova Express explores the problems that technology creates in the information age; and the ways in which language and thought have come under the influence of mass media. The book begins with a broad declaration against consumerism and corporate control: Listen all you boards syndicates and governments of the earth. And you powers behind what filth deals consummated in what lavatory to take what is not your

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19

Russell, David. "The Tumescent Citizen." M/C Journal 7, no. 4 (2004). http://dx.doi.org/10.5204/mcj.2376.

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Are male porn stars full-fledged citizens? Recent political developments make this question more than rhetorical. The Bush Justice Department, led by Attorney General John Ashcroft, has targeted the porn industry, beginning with its prosecution of Extreme Associates. More recently, the President requested an increase in the FBI’s 2005 budget for prosecuting obscenity, one of the few budget increases for the Bureau outside of its anti-terrorism program (Schmitt A1). To be sure, the concept of “citizen” is itself vexed. Citizenship, when obtained or granted, ostensibly legitimates a subject and

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20

Keogh, Luke. "The First Four Wells: Unconventional Gas in Australia." M/C Journal 16, no. 2 (2013). http://dx.doi.org/10.5204/mcj.617.

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Unconventional energy sources have become increasingly important to the global energy mix. These include coal seam gas, shale gas and shale oil. The unconventional gas industry was pioneered in the United States and embraced following the first oil shock in 1973 (Rogers). As has been the case with many global resources (Hiscock), many of the same companies that worked in the USA carried their experience in this industry to early Australian explorations. Recently the USA has secured significant energy security with the development of unconventional energy deposits such as the Marcellus shale ga

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21

Podkalicka, Aneta. "To Brunswick and Beyond: A Geography of Creative and Social Participation for Marginalised Youth." M/C Journal 14, no. 4 (2011). http://dx.doi.org/10.5204/mcj.367.

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This article uses a case study of a Melbourne-based youth media project called Youthworx to explore the processes at stake in cultural engagement for marginalised young people. Drawing on ethnographic research conducted between 2008 and 2010, I identify some ways in which the city is implicated in promoting or preventing access to socially valued spaces of creativity and intended social mobility. The ethnographic material presented here has both empirical and theoretical value. It reveals the important relationships between the experience of place, creativity, and social life, demonstrating po

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22

Barker, Timothy Scott. "Information and Atmospheres: Exploring the Relationship between the Natural Environment and Information Aesthetics." M/C Journal 15, no. 3 (2012). http://dx.doi.org/10.5204/mcj.482.

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Our culture abhors the world.Yet Quicksand is swallowing the duellists; the river is threatening the fighter: earth, waters and climate, the mute world, the voiceless things once placed as a decor surrounding the usual spectacles, all those things that never interested anyone, from now on thrust themselves brutally and without warning into our schemes and manoeuvres (Michel Serres, The Natural Contract, p 3). When Michel Serres describes culture's abhorrence of the world in the opening pages of The Natural Contract he draws our attention to the sidelining of nature in histories and theories th

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