Bibliografías temáticas / AT mód

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Literatura académica sobre el tema "AT mód"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 2 de febrero de 2022

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Artículos de revistas sobre el tema "AT mód"

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Király, Ildikó, Márton Maczkó, András Palkovics y Virág Mihálka. "Ökológiai termesztésben alkalmazható talajtakarási módok gyomelnyomó hatása szamócaültetvényben". Jelenkori Társadalmi és Gazdasági Folyamatok 12, n.º 3 (1 de enero de 2017): 81–87. http://dx.doi.org/10.14232/jtgf.2017.3.81-87.

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Az ökológiai gazdálkodás legfontosabb eleme a talaj termékenységének megőrzése. Ennek érdekében környezetkímélő talajmüvelést kell folytatni, melynek egyik módja a talajtakarás szerves vagy szervetlen anyagokkal. Kísérletünkben háromféle talajtakarási mód (agroszövet, szalma, széna) gyomelnyomó hatását értékeltük. Mindhárom alkalmazott talajtakarási mód jelentősen csökkentette a gyomtömeget a takaratlan kontroll parcellához viszonyítva. A legnagyobb gyomelnyomó hatása az agroszövetnek volt, viszont ez a talajtakarási mód nehezítette a kísérletben alkalmazott (szerves eredetű trágyaféleségek adagolása 2 havonta) tápanyag-visszapótlási módot.
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Csikós, Ella. "A szellemi termelési mód mint alternatíva". Információs Társadalom 13, n.º 2 (1 de junio de 2013): 77. http://dx.doi.org/10.22503/inftars.xiii.2013.2.6.

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H. Varga, Márta. "Igemód és mondatmód. A felszólító mód és a kötőmód („a mellékmondati felszólító mód”) összefüggései a magyarba". Magyar Nyelvőr 144, n.º 4 (2020): 441–59. http://dx.doi.org/10.38143/nyr.2020.4.441.

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Kajdi, László y István Nemecskó. "A kártyás fizetési mód területi jellemzői Magyarországon". Hitelintézeti szemle 19, n.º 1 (marzo de 2020): 65–89. http://dx.doi.org/10.25201/hsz.19.1.6589.

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Bellardi, Marco. "Filmszerű elbeszélés". Apertura 15, n.º 2 (2020): 1–26. http://dx.doi.org/10.31176/apertura.2019.15.2.3.

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A filmszerű narrátor [para-cinematic narrator] fogalmát bevezető cikk a narratív diskurzus szintjén vizsgálja, miként imitálja a filmszerű regény és novella a filmes formát. A szerző az irodalmi igeidők használatát a filmi szemiózis által kifejezett időbeliséggel veti össze. A filmes és irodalmi elbeszélés közötti kapcsolódást a háttér és az előtér narratív stílusai mentén térképezi fel. A szerző amellett érvel, hogy a filmes narratíva előtér és háttér elrendeződése – vagyis a „narratív kiemelés” (Weinrich 1971) – az előtérre teszi a hangsúlyt, s az így kialakuló narratív kiemelést „ellaposítja” a médiumra jellemző „monstratív” minőség (Gaudreault 2009). A lapos narratív kiemelést az erőteljesen filmszerű elbeszélés az igeidők alkalmazásával remedializálja. A montázs és más filmspecifikus technikák imitálása a remedializált, filmszerű időbeliségbe illeszkedő jellegzetességként gondolható el. A szerző felidézi továbbá a műfajelmélet „mód” fogalmát (Fowler 2002), melynek segítségével leírhatóvá válik egy-egy tulajdonság műfajok közötti átültetése. A filmszerű mód fogalmának segítségével az alapvető jellegzetességek filmből irodalomba történő remedializációja műfajspecifikus diszkurzív keretbe foglalható.
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Farkas, Attila Márton, Balázs Kékesi y Éva Judit Técsi. "Kognitív reklámanalízis." Információs Társadalom 13, n.º 1 (1 de marzo de 2013): 31. http://dx.doi.org/10.22503/inftars.xiii.2013.1.3.

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Tanulmányunkban egy kognitív nyelvészet alapú, kommunikációs hatást elemző mód-szert mutatunk be. Először röviden összefoglaljuk a kognitív nyelvészet azon elméleteit, melyek tanulmányunk szempontjából a legfontosabbak. Utána elméletben bemutatjuk azt a módszertant, amit reklámok kommunikációs hatásának elemzésére dolgoztunk ki, a kognitív nyelvészet elméleteinek segítségével, majd a módszertan alkalmazását részletesen bemutatjuk egy televíziós reklám elemzésén keresztül.
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Nyilas, Áron, Attila Paszt, Zsolt Simonka, Szabolcs Ábrahám, Bernadett Borda, Eszter Mán y György Lázár. "Laparoscopos technika alkalmazása nagyméretű lépek eltávolítására: Pfannenstiel-metszés mint alternatív specimeneltávolítási mód". Magyar Sebészet (Hungarian Journal of Surgery) 69, n.º 1 (marzo de 2016): 14–19. http://dx.doi.org/10.1556/1046.69.2016.1.3.

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Absztrakt Háttér: A laparoscopos splenectomia (LS) során extrém lépméret esetén gyakori technikai probléma a specimen hasüregből való eltávolítása. Általában a specimen EndoBagbe helyezése és morcellatiót követő eltávolítása terjedt el. Masszív splenomegalia, 1000–2000 grammos lépek esetén ez a módszer olykor nem kivitelezhető, mivel a lép mérete meghaladja a legnagyobb EndoBag űrtartalmát. Ebben az esetben, irodalmi adatok szerint, vagy a hasüregen belüli morcellatiót végezhetünk (splenosis veszélye), vagy laparotomiából távolíthatjuk el a speciment. Munkacsoportunk a problémára megoldásként 2009 óta Pfannenstiel-metszést alkalmaz a specimen eltávolítására. Módszer: A 2002. január 1. és 2014. szeptember 30. között klinikánkon végzett 74 LS eredményeit elemeztük. A speciment 56 esetben a szokásos módon a lateralis port helyén morcellatióval, míg nagyméretű lépek esetén 12 esetben 10–12 cm-es Pfannenstiel-metszésből távolítottuk el. Eredmények: A műtétek átlagos hossza 121 (50–220) perc volt. Pfannenstiel-metszésből történő specimeneltávolítás esetén szignifikánsan rövidebb műtéti időt tapasztaltunk (108 vs. 125 perc; p = 0,05) és nagyobb méretű lépeket tudtunk eltávolítani (1032 vs. 338 gramm; p = 0,0001), mint a hagyományos morcellatiós technikával. A módszer a kórházi benntartózkodás hosszát nem nyújtotta meg (4,7 vs. 5,2 nap; p = 0,178). Következtetések: Vizsgálatunk alátámasztja, hogy a laparoscopos lépeltávolítás biztonságos és számos előnnyel jár masszív splenomegalia esetében is. A specimen Pfannenstiel-metszésből történő eltávolítását biztonságos és kozmetikailag is elfogadható alternatívának tartjuk.
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Szczerbakiewicz, Rafał Tomasz. ""W zwierciadle mroczne i niejasne". Alternatywne quasi-biografie św. Pawła w lustrze filozofii (Jacob Taubes, Alain Badiou, Giorgio Agamben, Slavoj Žižek, Emmanuel Carrère)". Annales Universitatis Mariae Curie-Skłodowska, sectio FF – Philologiae 35, n.º 2 (5 de marzo de 2018): 11. http://dx.doi.org/10.17951/ff.2017.35.2.11.

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<p>Przedmiotem artykułu jest znaczące przekształcenie kulturowego obrazu historycznej postaci w związku z ideologicznym wpływem dominujących na przełomie XX i XXI wieku mód kulturowych i ideologii. Tkwiąca w człowieku narracyjna skłonność jest zarazem potrzebą nieustannego korygowania znanych z historii opowieści o wybitnych dziejowych postaciach – ich osobowościach, motywacjach, czynach (swoisty retelling rekapitulizujący znane i weryfikowalne bądź mityczne ich losy).</p>
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Seregi, Bálint Leon, Péter Ficzere y Lajos Borbás. "Fémalkatrészek additív és szubtraktív módon történő gyártásának összehasonlítása". Acta Periodica 22 (2021): 18–32. http://dx.doi.org/10.47273/ap.2021.22.18-32.

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A bemutatott elméleti összehasonlítás célja az additív és szubtraktív módon előállított fémalkatrészek különböző tulajdonságainak összevetése, mint felületi érdesség, gyárthatóság vagy gyártási idő szempontjából. A vizsgálatot a két gyártási mód jellegzetességéből adódó tulajdonságok felhasználásával végezzük. Az összehasonlítás célja, hogy egy legyártani kívánt alkatrészről el tudjuk dönteni melyik gyártástechnológiával érdemesebb létrehozni, ha az általunk kiválasztott paramétert részesítjük előnyben (gyártási sebesség, felületi minőség).
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Vincze, Orsolya y János László. "Megküzdési formák Jókai Mór Erdély aranykora címu regényében". Magyar Pszichológiai Szemle 59, n.º 3 (1 de noviembre de 2004): 397–410. http://dx.doi.org/10.1556/mpszle.59.2004.3.7.

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A történelmi regények a szocializáció egy sajátos területét reprezentálják (Burke, 1945; Bettelheim, 1975). A legtöbb történelmi regény nemcsak esztétikai élvezetet nyújt, hanem a történelem, a kollektív emlékezet játéktere is egyben. Ezek a regények azon felül, hogy bevezetik a befogadót az olvasás muvészetébe, a nemzeti identitás kulturális mintáit is közvetítik. Kutatócsoportunkkal arra vállalkoztunk, hogy megvizsgáljuk a legnépszerubb magyar történelmi regények azonosulásra csábító mintázatait, amelyek - feltételezésünk szerint - sikerességük kulcsai is egyben. A sorban szereplo harmadik legnépszerubb regény Jókai Mór Erdély aranykora címu regénye. A vizsgálat célja a regényben felmerülo politikai (és magánéleti) problémákkal szemben alkalmazott megküzdési stratégiák rendszerének feltérképezése és elemzése volt. Azonosítottuk a leggyakrabban eloforduló szereploket ért fenyegetéseket, valamint a fenyegetésekkel szemben alkalmazott megküzdési módokat. Ezenfelül minden egyes megküzdési mód kimenetelét, hatékonyságát is értékeltük. Így az interperszonális és csoportszintu kapcsolatok konfliktusmátrixa, valamint a szereplok copingmátrixa alapján a regényben egy jól kirajzolódó megküzdési modellt kaptunk. Számos megküzdési mód jelenik meg a regényben. Figyelemreméltó, hogy ellentétben a „heroikus történelmi” elbeszélésekkel, a regény sem a konfrontációt, sem az instrumentalizációt nem ábrázolja hatékony megküzdési stratégiának. A pragmatista csoport számára egzisztenciális szempontból az elfogadás, valamint az ellenállást követo elfogadás bizonyul a leghatékonyabb megküzdési módnak, noha ez számos esetben az identitás gyengítésével jár.
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Tesis sobre el tema "AT mód"

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Kratochvíl, Tomáš. "Ultrazvukový zobrazovací systém do USB". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316813.

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This master thesis deals with development and construction of ultrasound diagnostical system with USB interface. The main task is to study current usage of A mode ultrasound systems and methods of their construction. Following with own design of A mode ultrasound system with usage of assigned Olympus ultrasound transducer.
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Jemelík, Lukáš. "Návrh měřících struktur pro obvody s diferenčními signály". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218873.

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This master´s thesis deals about a measuring structures of elements working at a current mode. There were outlined structures for measuring input and output impedance. These structures were simulated for DACA element. It deals with a voltage to current and current to voltage converters. All structures and converters were simulated at computer program PSpice. Selected variant were practically verified and control measuring was realized.
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Kačurik, Tomáš. "Vysoce náročné aplikace na svazku karet Intel Xeon Phi". Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2016. http://www.nusl.cz/ntk/nusl-255394.

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The main topic of this thesis is the implementation and subsequent optimization of high performance applications on a cluster of Intel Xeon Phi coprocessors. Using two approaches to solve the N-Body problem, the possibilities of the program execution on a cluster of processors, coprocessors or both device types have been demonstrated. Two particular versions of the N-Body problem have been chosen - the naive and Barnes-hut. Both problems have been implemented and optimized. For better comparison of the achieved results, we only considered achieved acceleration against single node runs using processors only. In the case of the naive version a 15-fold increase has been achieved when using combination of processors and coprocessors on 8 computational nodes. The performance in this case was 9 TFLOP/s. Based on the obtained results we concluded the advantages and disadvantages of the program execution in the distributed environments using processors, coprocessors or both.
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Hebnar, Tomáš. "Hnací ústrojí nákladního vozidla 8x8". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230475.

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This thesis is focused on building a replacement torsion system of drivetrain of 8x8 and 8x4 trucks and subsequent computational analyses of built systems. There were made two analyses. The first one is a computational analysis of the shapes of vibration and The second one is a sensitivity analysis. The sensitivity analysis is studying effect on the size of the natural frequencies under the effect of gear ratio.
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Horák, Ondřej. "Fázovací obvody s moderními funkčními bloky". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-218030.

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The present thesis is focused on all pass filters. The principle of all pass filters, their properties, the design of nth degree of these circuits will be analysed in succession and then some of functional blocks, by which these structures can be made, will be described. After that, the allpass filters will be designed and simulated in program OrCAD PSpice. First of all, the analysis will be performed with ideal components, then with real components. After that, the sensitivity and tolerance analysis will be made and the influence of parasite effects on circuit parameters will be examined. Once the experiments are finished, the design of Printed Circuit Board's (PCB) will be realized. Circuit showing the best parameters will be chosen for the design.
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Jirounek, Matěj. "Kmitočtové filtry s diferenčním proudovým zesilovačem". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218977.

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This master´s thesis deals with the differential filters working in the current mode. It is dealt with the design methodologies of these filters and conversion circuits from voltage to current mode. Own work deals with 4 types of differential participation of structures. In this work there has been used programs SNAP and OrCAD. These programs were used for simulations of filters to proposed proper design. Results from this thesis is showed by graphs.
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Bučina, Peter. "Multimediální služby v bezdrátových sítích". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219431.

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The main topic of my diploma thesis is dedicated to the issue of wireless networks mostly aimed at IEEE 802.11 standard. Theoretical part of the thesis is divided into three main chapters. It deals with basic overview of standards, architecture, utilization of radio spectrum and modulating techniques in signal processing. Further, it describes basic security measures and quality of service requirements in WLAN networks. The thesis is complemented by two separate laboratory assignments focused on procedure related to the chosen problematic. The first assignment handles common steps to break ciphered protocols WEP and WPA in WLAN’s. Linux software called Back Track 5 was used to provide complete package of tools for WLAN security tests. The second one is aimed at practical options on video streaming in converged wireless networks and also at remote access of mobile users to wireless IP camera video stream.
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Grebíková, Lucie. "Měření vlastností oftalmologického ultrazvukového systému". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220881.

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The thesis deals with physical principles of ultrasound with following specialization on ophtalmic ultrasound system Nidek Echoscan 4000 and its properties. And also it deals with description of investigative techniques in ophthalmology (A-mode, B-mode, biometry and pachymetry). Next, they was suggested procedures of measurement and that is spatial resolution (axial and lateral spatial resolution) and propagation speed of ultrasound depending on the temperature. Then these properties was tested on laboratory phantoms of eye – ETETECH LTD. and Multipurpose Ultrasound Phantom but on created phantoms of eye too, which will be made from agarose gel with build-in materail (fishing line, plastic film, plastic bag and rubber). At the end, measured values was processed in the generated program.
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Kubík, Milan. "Diferenční kmitočtové filtry s moderními aktivními prvky". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218832.

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The master thesis focuses on design of fully-differential frequency filters with modern active components in current mode. First part informs about problems concerning analogue frequency filters and creating differential structures. Second part deals with methods of create filters and used active components - DACA (Digital Adjustable Current Amplifier) and MO-CF (Multiple Output Current Follower). Own design of differential filters is divided on two parts. In the first part of design results there are filters created with synthetic higher-order elements. There are presented circuit structures implementing the third order low pass filter and high pass filter. In the second part are designed filters with signal flow graphs. The first circuit implementing low pass, high pass, band pass, band rejection and all-pass filter. The second circuit is with help of the same set of current amplification by DACA components tuning of the natural frequency. For this circuit was make sensitivity analysis. In the final part is practical implementation of the differential frequency filter for tuning of the natural frequency and summarises the thesis.
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Belloň, Michal. "Zdroj modulačního signálu pro mikrovlnný maják". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220247.

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This project is focused on construction of source of modulation signal for microwave beacon. The output signal is the same as signal, which is generated by PC software WSJT (Weak Signal by Joe Taylor) on PC sound card output. Signal on device output is modulated using by WSJT modulation and its specific JT4 mode. The device output has I and Q components of signal.
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Libros sobre el tema "AT mód"

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Fajó, János. Síkfestészet: A mód-a módszer. Budapest: Osiris, 1999.

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Ayob, Osman. Mad Mid Mod. 2a ed. Kuala Lumpur: Fajar Pakeer, 2010.

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Högnäs, Kurt. Med sorgens mod. [Helsinki]: Söderström, 1989.

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Tikkanen, Märta. Sofia vuxen med sitt MBD. 2a ed. [Stockholm]: Forum, 1998.

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Mid-century ads: Advertising from the Mad Men era. Köln: Taschen, 2012.

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Denmark. Arbejdsskadeforsikringsloven med kommentar: Lov om forsikring mod følger af arbejdsskade. 2a ed. København: GadJura, 1995.

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Akkari, Ahmed. Min afsked med islamismen: Muhammedkrisen, dobbeltspillet og kampen mod Danmark. Denmark]: BT i samarbejde med People's Press, 2014.

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National Geographic Society (U.S.), ed. Mud, mud, mud. Washington, D.C: National Geographic Society, 2001.

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Copyright Paperback Collection (Library of Congress), ed. It's a mod, mod, mod, mod murder. New York: Signet, 2005.

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Rose, Carla. It's a mad, mad, mad, mad Mac. New York: Windcrest/McGraw-Hill, 1994.

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Capítulos de libros sobre el tema "AT mód"

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Roman, Zak. "Mad Men’s Mid-Century Modern Times". En The Legacy of Mad Men, 149–62. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31091-2_10.

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Godfrey, Menna. "Mud, glorious mud! Mud kitchensand more". En Young Children’s Play and Creativity, 189–98. Abingdon, Oxon ; New York, NY : Routledge, 2018.: Routledge, 2017. http://dx.doi.org/10.4324/9781315446844-16.

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Mcdermott, Michael C. y K. C. Chan. "International Marketing: It’s a Mad, Mad, Mad, Mad World". En Marketing Theory and Practice, 359–78. London: Macmillan Education UK, 1995. http://dx.doi.org/10.1007/978-1-349-24260-3_19.

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Rudnianski, Michel y Aleth d’Assignies. "From MAD to MAD". En Strategic Stability in the Post-Cold War World and the Future of Nuclear Disarmament, 229–58. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-015-8396-1_17.

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Oette, Mark, Marvin J. Stone, Hendrik P. N. Scholl, Peter Charbel Issa, Monika Fleckenstein, Steffen Schmitz-Valckenberg, Frank G. Holz et al. "MLD". En Encyclopedia of Molecular Mechanisms of Disease, 1337. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-29676-8_6232.

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Oette, Mark, Marvin J. Stone, Hendrik P. N. Scholl, Peter Charbel Issa, Monika Fleckenstein, Steffen Schmitz-Valckenberg, Frank G. Holz et al. "MCD". En Encyclopedia of Molecular Mechanisms of Disease, 1270. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-29676-8_7907.

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Bährle-Rapp, Marina. "mud". En Springer Lexikon Kosmetik und Körperpflege, 361. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_6717.

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"Mad (Mxd)". En Encyclopedia of Cancer, 2135. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-16483-5_3492.

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Goodlad, Lauren M. E., Lilya Kaganovsky y Robert A. Rushing. "Introduction". En Mad Men, Mad World, 1–32. Duke University Press, 2013. http://dx.doi.org/10.1215/9780822399063-001.

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Polan, Dana. "Maddening Times". En Mad Men, Mad World, 35–52. Duke University Press, 2013. http://dx.doi.org/10.1215/9780822399063-003.

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Actas de conferencias sobre el tema "AT mód"

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El-Husseiny, Mahmoud Ahmed, Samir Mohamed Khaled, Taher El-Sebaay El-Fakharany y Yehia Mohamed Al-Nadi. "Comparative Study of Managed Pressure Drilling Application in Deepwater Gas Wells - Case Study from Offshore Eastern Mediterranean of Egypt". En SPE/IADC Middle East Drilling Technology Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/202192-ms.

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Abstract Although devised in 2003, managed pressure drilling (MPD) has gained widespread popularity in recent years to precisely control the annular pressure profile throughout the wellbore. Due to the relatively high cost and complexity of implementing MPD, some operators still face a challenge deciding whether or not to MPD the well. In the offshore Mediterranean of Egypt, severe to catastrophic mud losses are encountered while conventionally drilling deepwater wells through cavernous fractured carbonate gas reservoirs with a narrow pore pressure-fracture gradient (PP-FG) window, leading to the risk of not reaching the planned target depth (TD). Furthermore, treating such losses was associated with long non-productive time (NPT), massive volume consumption of cement, and lost-circulation materials (LCM), in addition to well control situations encountered several times due to loss of hydrostatic head during severe losses. Accordingly, the operator decided to abandon the conventional drilling method and implement MPD technology to drill these problematic formations. In this paper, the application of MPD is to be examined versus the conventional drilling in terms of well control events, NPT, rate of penetration (ROP), mud losses per drilled meter, LCM volume pumped, and drilling operations optimization. According to the comparative study, MPD application showed a drastic improvement in all drilling performance aspects over the conventional drilling where the mud losses per drilled meter reduced from 19.6 m3/m to 3.7m3/m (123.2 bbl/m to 23.4 bbl/m). In addition to that, a 35% reduction of NPT and also a 35% reduction of LCM pumped, and 67.2 % reduction by volume of cement pumped to cure the mud losses. Moreover, the average mechanical rate of penetration increased by 37.4%. MPD was also credited with eliminating the need for an additional contingent 7" liner which was conventionally used to isolate the thief zone. The MPD ability to precisely control bottom hole pressure during drilling with the integration of MPD early kick detection system enables the rapid response in case of mud loss or kick, eliminating kick-loss cycles, well control events, and drilling flat time to change mud density. This paper provides an advanced and in-depth study for deep-water drilling problems of a natural gas field in the East Mediterranean and presents a comprehensive analysis of the MPD application with a drilling performance assessment (average ROP, mud losses, LCM and cement volumes, well control events) emphasizing how MPD can offer a practical solution for future drilling of challenging deepwater gas wells.
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Edge, David, Michael Pope, Konstantin Puskarskij, Helio Santos, Henry Pinkstone y Phil McKenzie. "Successful First Implementation of MPD Technology Offshore Australia: Regulatory, Technical and Operational Lessons Learned". En IADC/SPE Managed Pressure Drilling & Underbalanced Operations Conference & Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206390-ms.

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Abstract This paper details the successful first implementation of closed-loop Managed Pressure Drilling (MPD) technology offshore Australia, on a 6th generation semi-submersible rig. The paper covers the process of achieving safety case acceptance to implement MPD technology from the National Offshore Petroleum Safety and Environmental Management Authority (NOPSEMA), the government regulatory authority. The paper describes the project concept design phase, including a Drill Well on Simulator (DWOS) exercise, which was completed to confirm MPD techniques would mitigate problems experienced on conventionally drilled offset wells. The MPD risk assessments completed included HAZID / BOWTIE / HAZOP / FEA studies which were included in the safety case formal safety assessment that was submitted to NOPSEMA. In parallel the Well Operations Management Plan was submitted, detailing the planned MPD methodology. The detailed Well Engineering scope including the MPD Programme, Operational and Contingency Procedures and Commissioning Process was developed to form a Joint Operations Manual. Four levels of project specific MPD training were developed, reviewed, accepted and monitored by NOPSEMA, including classroom based and rig site practical training. Post MPD system installation in Singapore, the System Integrity Testing was successfully completed offshore Australia. Lastly the paper details MPD operations on the first well including the effective use of MPD well control, dynamic MPD FIT, LOT and Pore Pressure testing and establishing the high formation temperature effects on drilling mud density. The closed-loop MPD system allowed the riser deployed sections to be drilled using a statically underbalanced mud system and confirmed the improved capability and flexibility in terms of detection and controllability during mud loss events.
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Shen, Yuelin, Sameer Bhoite, Zhengxin Zhang, Wei Chen, Sylvain Chambon, Sameh Ibrahim, David Conn, David Smith, Cen Chen y Shadi Mussa. "Understand the Effect of Mud Pulse on Drilling Dynamics Using Big Data and Numerical Modeling". En SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206157-ms.

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Abstract It is common to have measured depth exceeding 20,000 ft for unconventional oil and gas wells. To ensure the pressure pulse can be detected on the surface, many MWD tools have been designed to generate mud pressure pulse with very large amplitude. While the large pressure pulse solved the problem of sending the measured information up to the surface, it creates significant impact on drilling system energy variation and downhole drilling dynamics. This paper focuses on understanding the effects using big data and drilling system modeling. When a commonly used MWD tool generates mud pulse sequence, it chokes the flow path at designed patterns. This creates mud flow variation in the mud motor below the MWD tool. It also generates axial force variations due to pressure changes, which affect WOB. These changes cause the motor and the bit to experience significant rpm variations. The combined rpm variation and WOB variation often excite more severe axial and lateral shock and vibration. These effects are quantified by thousands of high-frequency downhole datasets and advanced numerical modeling. In the high-frequency downhole datasets, some of them are obtained from BHAs with MWD tools generating large mud pressure pulse, and some of them are obtained from BHAs with MWD tools generating smaller mud pressure pulse or transmitting the measurements using electromagnetic signal. Statistics of rpm variation and axial and lateral shock and vibrations are compared. It clearly shows that the BHAs utilizing large mud pressure pulse experience more severe torsional, axial, and lateral vibrations. When looking into specific datasets, it showed that mud pressure pulse could cause the motor to lose more than half of its rpm during the flow choking phase. Typical datasets indicate that mud pressure pulse correlates to severe high-frequency torsional oscillation (HFTO) in motorized rotary steerable BHA. An advanced transient drilling dynamics model was built to simulate the whole drilling system subjecting to mud pressure pulse incurred loading conditions. It was found that large-magnitude mud pressure pulse induced more stick/slip and axial and lateral vibrations as recorded in downhole high-frequency data. The increased rotational, axial, and lateral vibrations correspond to more loading variations in the mud motor components and PDC cutters on the drill bit. These variations could cause accelerated damage to the drill bit and downhole tools. In summary, large mud pressure pulse utilized by some MWD tools introduces significant rpm variation and shock and vibration, which is quantified by big data and further demonstrated by drilling system modeling. The information could help make decisions on BHA design and tool selection to achieve improved drilling performance and reduce the risk of premature tool failure.
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Dalgit Singh, Harpreet Kaur, Ho Ching Shearn, Bao Ta Quoc y Dien Nguyen Van. "Using Managed Pressure Drilling Equipment to Troubleshoot Well Control Issues with Total Lost Circulation and Ballooning on A Semisubmersible Rig". En SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/205982-ms.

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Abstract When drilling from a deepwater semisubmersible rig, the operator encountered wells problems, including lost circulation, influxes, and ballooning, in the 14 3/4-in. hole section. Managed Pressure Drilling (MPD) equipment that helped to mitigate these issues specifically, when stripping in the hole with the bottom hole assembly through the Rotating Control Device (RCD) bearing assembly while managing surge and swab pressures, monitoring the well while displacing heavy mud into the open hole, conditioning the contaminated mud, removing gas from the well, and fingerprinting the flow back to verify ballooning against influxes, and finally stripping out of the hole. The operator experienced a total loss of circulation at the 16-in. liner shoe at 1,633m while drilling the 14 3/4-in. hole section. Several lost-circulation material (LCM) pills of different weights were pumped to cure the losses without success. Then the well was flow-checked, the gain was noted, and the well shut-in. Having the MPD chokes and the Coriolis flowmeter in place made it possible to adjust the surface back pressure (SBP) accordingly within a small operating window. As a result, the operator could achieve the key objectives of stripping the drillstring in the hole, stripping out of the hole, and rolling over to spot 1.88SG heavy mud on the bottom using the pump and pull method. After LCM was pumped and a hesitation squeeze performed, well operations were stabilized, and the casing was run to a 2,111m measured depth. Advanced flow monitoring enabled the MPD to determine the required SBP for balancing the well. MPD applied 60psi of SBP and noted a gain of 8.3bbl/hr from the flowmeter. Next, MPD applied 65psi SBP and the well was static. Then, MPD applied 70psi SBP, and the well took losses at a rate of 19bbl/hr. MPD allowed to successfully strip the BHA in the hole through the RCD bearing assembly to the shoe. Correct string displacement observed via the MPD Virtual Trip Tank, achieved by adjusting the SBP from 62psi to 125psi. The closed-loop circulating system enabled safely circulating and conditioning contaminated gas-cut mud in the hole back to homogeneous mud. MPD reduced SBP incrementally and fingerprinted flow back at every step to give assurance that well ballooning, and not influxes, caused the flow back. Dynamically adjusting SBP, coupled with advanced monitoring of the returns flow using the Coriolis flowmeter, enabled balancing the well despite the challenges of a mixed mud gradient in the annulus and a narrow operational window. The MPD riser consisted of an RCD below-tension-ring (BTR)-s, flow spool, and top and bottom crossovers. Rig modifications involved fabricating the fixed piping to allow integrating MPD equipment with the rig system.
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Kamal, Babar, Emil Stoian y Graeme MacFarlane. "Successful Application of Managed Pressure Drilling MPD Technology to Reach TD in a Narrow Margin HPHT Well in the North Sea – A Case History". En SPE/IADC Middle East Drilling Technology Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/202107-ms.

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Abstract This paper reviews the recently concluded successful application of a Managed Pressure Drilling (MPD) system on a High-Pressure High-Temperature (HPHT) well with Narrow Mud Weight Window (NMWW) in the UK sector in the Central North Sea. Well-A was drilled with the Constant Bottom Hole Pressure (CBHP) version of MPD with a mud weight statically underbalanced and dynamically close to formation pore pressure. Whilst drilling the 12-1/2" section of the well with statically under-balanced mud weight, to minimize the overbalance across the open hole, an influx was detected by the MPD system as a result of drilling into a pressure ramp. The MPD system allowed surface back pressure to be applied and the primary barrier of the well re-established, resulting in a minimal influx volume of 0.06 m3 and the ability to circulate the influx out by keeping the Stand Pipe Pressure (SPP) constant while adjusting Surface Back Pressure (SBP) through the MPD chokes in less than 4 hours with a single circulation. After reaching the 12-1/2" section TD, only ~0.025sg (175 psi) Equivalent Mud Weight (EMW) window was available to displace the well and pull out of hole (POOH) the bottom hole assembly (BHA) therefore, 3 × LCM pills of different concentrations were pumped and squeezed into the formation with SBP to enhance the NMWW to 0.035sg EMW (245 psi) deemed necessary to kill the well and retrieve BHA. MPD allowed efficient cement squeeze operations to be performed in order to cement the fractured/weak zones which sufficiently strengthened the well bore to continue drilling. A series of Dynamic Pore Pressure and Formation Integrity Tests (DPPT and DFIT) were performed to evaluate the formation strength post remedial work and to define the updated MMW. Despite the challenges, the MPD system enabled the delivery of a conventionally un-drillable well to target depth (TD) without any unplanned increase/decrease in mud weight or any costly contingency architecture operations, whilst decreasing the amount of NPT (Non Productive Time) and ILT (Invisible Lost Time) incurred. This paper discusses the planning, design, and execution of MPD operations on the Infill Well-A, the results achieved, and lessons learned that recommend using the technology both as an enabler and performance enhancer.
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Xisto, Carlos M., José C. Páscoa y Paulo J. Oliveira. "Numerical Modelling of Electrode Geometry Effects on a 2D Self-Field MPD Thruster". En ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63144.

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A self-field MPD thruster in its most basic form consists in a central cathode surrounded by a concentric anode. With this coaxial geometric shape is very difficult to use experimental techniques to visualize the plasma flow parameters. In the following paper a previously proposed numerical method for the ideal magnetohydrodynamics (MHD) equations is extended to deal with resistive MHD viscous flow. The numerical method is based on the well known PISO algorithm and makes use of the AUSM-MHD scheme for flux calculation. For validation three test cases will be addressed. We start with a resistive MHD problem, namely the Shercliff test case. The second and third test cases are standard 2D ideal MHD problems, these will be used to validate our method for complex interaction of MHD shocks. We will close this paper with some preliminary results for a quasi-bi-dimensional self-field magnetoplasmadynamic (MPD) thruster, where the effects of cathode length in the performance of the nozzle are analysed.
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Tu, Bing, Desheng Li y Enhuai Lin. "Research on MWD mud pulse signal extraction and recognition". En 2011 IEEE International Conference on Mechatronics and Automation (ICMA). IEEE, 2011. http://dx.doi.org/10.1109/icma.2011.5986234.

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Fernandes, Andre Alonso, Danilo Signorini Gozzi, Emmanuel Franco Nogueira, Felipe de Souza Terra, Guilherme Sirqueira Vanni y Rafael Schettini Frazão Filho. "MPD/MCD Offshore Application on a Dynamic Positioning Rig". En SPE/IADC Managed Pressure Drilling and Underbalanced Operations Conference & Exhibition. Society of Petroleum Engineers, 2015. http://dx.doi.org/10.2118/173825-ms.

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Kawasaki, Akira, Kenichi Kubota, Ikkoh Funaki y Yoshihiro Okuno. "MHD and Thermal Coupled Simulation of an MPD Thruster". En 51st AIAA/SAE/ASEE Joint Propulsion Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-3727.

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Hu, Jian, Di Zhu, Sheng Wu, Chris Lu, Andrew Sneddon y Yongchun Tang. "Mud Gas Isotopic Logging Using Mid Infrared Laser Spectromtory". En Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.1078.

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Informes sobre el tema "AT mód"

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John H. Cohen, Greg Deskins, William Motion y Jay Martin. DEVELOPMENT OF A MUD-PULSE HIGH-TEMPERATURE MEASUREMENT-WHILE-DRILLING (MWD) SYSTEM. Office of Scientific and Technical Information (OSTI), enero de 2002. http://dx.doi.org/10.2172/828406.

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Plummer, Brianna. Parisian Mad Men. Ames: Iowa State University, Digital Repository, 2013. http://dx.doi.org/10.31274/itaa_proceedings-180814-726.

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Bityurin, Valentin A. MHD Flow Control. Fort Belvoir, VA: Defense Technical Information Center, septiembre de 2006. http://dx.doi.org/10.21236/ada473536.

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Petersen, Kirsten Elisa. Danske daginstitutioners indsatser og disses betydninger for pædagogisk personale, børn og familier under COVID-19 pandemien 2020/2021. Aarhus University Library, 2021. http://dx.doi.org/10.7146/aul.420.

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Denne rapport præsenterer en række centrale resultater af et forskningsprojekt med fokus på daginstitutioners indsatser og betydning for pædagogisk personale, børn og familier under COVID-19 pandemien i Danmark. Forskningsprojektet har indsamlet data i perioden april 2020 til august 2020, og særligt i perioden fra midt april til juni, hvor alle landets daginstitutioner genåbnede efter cirka en måneds nedlukning af landets offentlige institutioner som følge af regeringens retningslinjer. Der er ligeledes indsamlet data i perioden august til oktober 2020, og igen i perioden januar til februar 2021. Der er således tale om tre empiriske nedslag hen over cirka et år af pandemiens forløb i relation til daginstitutionsledere og pædagogisk personale i landets daginstitutioner. De data, der ligger til grund for denne rapport, omfatter en spørgeskemaundersøgelse rettet mod daginstitutionsledere og en spørgeskemaundersøgelse rettet mod pædagogisk personale i daginstitutioner, geografisk fordelt over hele landet. Fælles for spørgeskemaundersøgelserne er et fokus på at udforske, hvordan daginstitutioner har arbejdet under COVID-19 pandemien, dels under selve nedlukningen i marts-april, hvor flere af landets daginstitutioner har fungeret som nødpasning, særligt for forældre med kritiske samfundsfunktioner, og dels under genåbningsfaserne, der officielt blev påbegyndt i midten af april og især har forløbet hen over forår og tidlig sommer 2020. Derudover er der ad to omgange foretaget en række forskningsinterview med daginstitutionsledere. I første omgang blev der foretaget 10 forskningsinterview i perioden august til november 2020, og i anden omgang er der foretaget 8 forskningsinterview med daginstitutionsledere fordelt på landets daginstitutioner omfattende perioden januar til februar 2021. Formålet med dette forskningsprojekt har været at kortlægge og udforske, hvordan daginstitutionsledere og pædagogisk personale i en række danske daginstitutioner for 0-6-årige børn løfter den store samfundsmæssige udfordring at håndtere COVID-19 pandemien på landets daginstitutioner.
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Rousculp, Christopher L. MHD For NRL Visit. Office of Scientific and Technical Information (OSTI), agosto de 2017. http://dx.doi.org/10.2172/1377387.

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Pivi, Mauro T. F. C-MAD User's Manual. Office of Scientific and Technical Information (OSTI), agosto de 2011. http://dx.doi.org/10.2172/1022521.

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LORAL FEDERAL SYSTEMS MANASSAS VA. Microlithographic Mask Development (MMD). Fort Belvoir, VA: Defense Technical Information Center, mayo de 1995. http://dx.doi.org/10.21236/ada294725.

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Garasi, Christopher Joseph, Kyle Robert Cochrane, Thomas Alan Mehlhorn, Thomas A. Haill, Randall M. Summers y Allen Conrad Robinson. ALEGRA-MHD : version 4.6. Office of Scientific and Technical Information (OSTI), enero de 2005. http://dx.doi.org/10.2172/920811.

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Garasi, Christopher Joseph, Thomas A. Haill y Allen Conrad Robinson. ALEGRA-MHD : Version 4.0. Office of Scientific and Technical Information (OSTI), noviembre de 2003. http://dx.doi.org/10.2172/918373.

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Charlton, L. (MHD calculations in tokamaks). Office of Scientific and Technical Information (OSTI), julio de 1987. http://dx.doi.org/10.2172/5663818.

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