Letteratura scientifica selezionata sul tema "Stories passed down"
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Articoli di riviste sul tema "Stories passed down"
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Gilles, Carol, Jean Dickinson e Jenine Loesing. "Patricia Polacco". Language Arts 75, n. 2 (1 febbraio 1998): 150–58. http://dx.doi.org/10.58680/la19983282.
Testo completoAbstract (sommario):
Highlights the work of author/illustrator Patricia Polacco. Discusses her picture books in terms of themes, including family stories; "passed down" stories featuring a babushka; stories that emphasize diverse communities; stories that contain magic or a miracle; and stories that help to raise social consciousness.
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Sato, Hiroshi, e Yuichi Ono. "Disaster Storytelling and Volcanic Eruptions Caused by Debris Avalanches on Mt. Bandai in Aizu and Mt. Unzendake and Mt. Mayuyama in Shimabara". Journal of Disaster Research 16, n. 2 (1 febbraio 2021): 141–45. http://dx.doi.org/10.20965/jdr.2021.p0141.
Testo completoAbstract (sommario):
People tend to forget the past. For example, nine years have passed since the Great East Japan Earthquake and Tsunami of 2011, and memories of the disaster have begun to fade even in the disaster-stricken areas. People who have experienced disasters directly have tried to spread the memories of those events in various ways because they do not want their children and grandchildren to endure what they did. One of the most impressive ways of sharing these memories is for witnesses of disasters to communicate how they directly experienced them. There is a challenge in handing down these stories because people directly affected by the disasters will die within the next ten years. This paper takes up two examples of volcanoes in Japan, and examines how stories of these disasters were passed on to people who have not experienced them directly. We proceed by investigating common points in these stories and comparing them, and also by exploring the activity of passing how these disaster stories have been passed down after more than 100 years since its occurrence when there are no more survivors who have any direct memory of it.
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Sukoyati, Mirna. "Analysis of Sumur Deringo Stories in Sumuranja Selatan Village for Elementary School Children". LADU: Journal of Languages and Education 3, n. 2 (4 febbraio 2023): 65–72. http://dx.doi.org/10.56724/ladu.v3i2.180.
Testo completoAbstract (sommario):
Background: Folklore is cultural literature that is passed down by word of mouth to be passed down from generation to generation to the next generation. However, there are many generations today who are not aware of the existence of folklore or storytelling, even though there is a lot of learning involved.
Purpose: The purpose of this research is to find out the story of Sum Ringo in the village of South Sumuranja as well as to analyze the intrinsic and extrinsic elements contained in the story of Sum Ringo for elementary school children.
Design and methods: The method used in this research is ethnographic method with a qualitative approach. Data collection techniques in this ethnographic method are through interviews, observation and documentation.
Results: The results of the study show that the story of Sum Ringo is a story formed from an activity carried out by the community. The story has indeed been trusted by the surrounding community which has been passed down by word of mouth from generation to generation to the next generation. Likewise, some elementary school children already know the story. The story contains lessons for children. From the results of the analysis, the story contains intrinsic elements consisting of themes, plot, characters and characterizations, setting, point of view and message, as well as other elements. external which consists of the cultural background and moral values contained in the story.
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Law, Easten. "Sanctification and Migration Across Generations: Expanding the Explicit Curriculum of Asian American Discipleship". International Bulletin of Mission Research 48, n. 3 (3 giugno 2024): 427–41. http://dx.doi.org/10.1177/23969393241248436.
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How do migration experiences passed down across generations relate to God’s work of sanctification, and how might Asian American churches engage the stories of their ancestors as a form of Christian formation? Drawing from scripture, migration theologies, educational theory, literature in Asian American ministry, and personal experience, this article argues that Asian American churches must begin designing discipleship curriculum that explicitly honors, integrates, and embodies the stories of their families’ multiple migrations into their spiritual lives because it is through such remembrance and learning that God can render Christ-like transformation.
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Kaplan, Gail. "Math Roots: Eureka! Or Don't Throw out the Crown with the Bathwater". Mathematics Teaching in the Middle School 8, n. 9 (maggio 2003): 484–88. http://dx.doi.org/10.5951/mtms.8.9.0484.
Testo completoAbstract (sommario):
The life of archimedes was almost entirely devoted to mathematical research. Historians claim that Archimedes would forget about eating while working on a mathematical problem. Anecdotes that have been passed down through the centuries reveal what is known about the life and personality of this mathematician. One of the most famous stories about Archimedes is the story of the golden crown.
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Hadžija, Sunaj, e Marija Kirvokapić-Knežević. "The function of storytelling in the novel 'Ceremony' by Leslie Marmon Silko". Univerzitetska misao - casopis za nauku, kulturu i umjetnost, Novi Pazar, n. 20 (2021): 78–89. http://dx.doi.org/10.5937/univmis2120078h.
Testo completoAbstract (sommario):
The paper examines the function of storytelling in the novel Ceremony. Leslie Marmon Silko includes traditional stories about the Laguna Pueblo, retelling stories, which have been passed down through the generations throughout oral traditions, stories that explore the nature of magic, that go into the origin of evil, and which can also show the way to redemption. Silko uses stories in the form of poems, oral narration, intertextuality, she even writes without chapters. She did not give chapters to her novel because she did not want to adapt to the standard format of the novel, she tries to avoid Anglo centric conventions. As many postmodern texts, the novel Ceremony can be seen as a response to the horrors of World War II. But unlike other literary works of postmodernism, Silko argues that we must present this tragedy throughout oral narration in order to heal ourselves.
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Dubey, Swasti. "Factual Origins of Myths". International Journal of Social Science And Human Research 05, n. 10 (12 ottobre 2022): 4491–93. http://dx.doi.org/10.47191/ijsshr/v5-i10-11.
Testo completoAbstract (sommario):
Many cultures have developed myths and legends rooted in the ideas of vampirism, lycanthropy, and witchcraft. According to anthropological currents, these stories don’t come up from nothing, but follow a process of transformation of elements drawn from real experiences eventually transformed into fictional stories depending on the message they are meant to spread. Every legend has an origin in history, an event with no plausible explanation at the time due to lack of scientific technology and resources. Although, reality can be described in scientific terms. These possible facts connected to mythology do not entirely explain the success of myth in folklore, but only some more or less impressive aspects following these legends. These facts when turned and twisted by imagination and superstitious thinking create these inexplicable enthralling stories which undoubtedly would be passed down to generations as souvenirs of history, culture, and civilization.
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Tanauova, Zh. "The Connection of Humorous Stories with Other Genres of Folklore". Iasaýı ýnıversıtetіnіń habarshysy 122, n. 4 (30 dicembre 2021): 47–56. http://dx.doi.org/10.47526/2021-4/2664-0686.05.
Testo completoAbstract (sommario):
Until now, Kazakh folk prose has been widely studied cognitively. In general, folklore as a science pays great attention to the genre of prose. However, it would be wrong to say that all genres of Kazakh folklore have been studied and known to the broad masses. Despite the large number of humorous stories, in Kazakh folklore they are considered within other genres of prose. In other words, humorous stories in Kazakh folklore were not the subject of a separate, special study. If we pay attention to the opinions expressed in the writings of famous scientists-researchers in the field of folklore, it is confirmed that humorous stories are a branch of folk literature that is passed down from generation to generation. Despite the fact that humorous stories have been previously studied, it is natural that the latest advances in science raise questions that need to be revised, so we realized the importance of humorous stories in the work of our people and their study is a scientifically relevant topic. Thus, based on previous studies of the genres of folklore, this article examines the connection between humorous stories and other genres.
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Ndejuru, Lisa. "“This, too, belongs”". Canadian Theatre Review 188 (1 ottobre 2021): 17–19. http://dx.doi.org/10.3138/ctr.188.004.
Testo completoAbstract (sommario):
“This, too, belongs,” is a mantra that helps me navigate this strange time of the global pandemic and Black Lives Matter. It also helps with the project I started. Waking the Stories is based on an archive of Ibiteekerezo or wisdom stories from the oral tradition of precolonial Rwanda, where I am from. These stories were traditionally held as bodies of wisdom and passed down in families. Very few Rwandans know how to interpret these stories anymore. They were transcribed and translated by colonial administrators, missionaries, and researchers to better understand, keep traces of, and ultimately supersede the cultures they colonized. The violence of it paralyses me and I feel very small. But what if that too belonged? What if I imagined my project as small as a seed? What if I gave myself permission to start very simply from where I am situated and acknowledged that one challenge of working through historical trauma is finding ways to look at the past, recognize what was done and experienced, its consequences to this day, and remaining well? To be continued.
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Jelínková, Ema. "Trauma Narratives of Scottish Childhood in Janice Galloway’s Short Stories". American & British Studies Annual 15 (21 dicembre 2022): 64–73. http://dx.doi.org/10.46585/absa.2022.15.2430.
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Janice Galloway represents one of the most strikingly original voices in new Scottish fiction, which breaks with the tradition of conventional narratives looking back at the national history and looking up to larger-than-life male heroes. Instead, Galloway writes deftly crafted short stories of everyday life in contemporary settings, finding that the past informs the present and proceeding to explore how the stateless nation’s cultural heritage affects her characters. This paper analyses selected stories from Galloway’s collections Blood (1991) and Where You Find It (1996) from the perspective of trauma criticism, which seems a particularly fitting approach to the author’s often disturbing narratives of violence and abuse. The focus is on child characters and on the ways that historical trauma, as introduced by Sigmund Freud and further refined by Cathy Caruth, is passed down to them. Finally, the paper provides examples from the individual short stories which illustrate how the traumatic experience can be acknowledged, witnessed, and ultimately communicated.
Libri sul tema "Stories passed down"
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Fine, Nic, a cura di. Generation to Generation: Stories Passed Down, Stories Passed On, Stories Forgotten, Stories Untold. South Africa: Hearts of Men, 2022.
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Holzhey, Christoph F. E., e Arnd Wedemeyer, a cura di. Weathering. Berlin: ICI Berlin Press, 2020. http://dx.doi.org/10.37050/ci-17.
Testo completoAbstract (sommario):
Weathering is atmospheric, geological, temporal, transformative. It implies exposure to the elements and processes of wearing down, disintegration, or accrued patina. Weathering can also denote the ways in which subjects and objects resist and pass through storms and adversity. This volume contemplates weathering across many fields and disciplines; its contributions examine various surfaces, environments, scales, temporalities, and vulnerabilities. What does it mean to weather or withstand? Who or what is able to pass through safely? What is lost or gained in the process?
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House, The Unapologetic Voice. Passed down from Mom: A Collection of Inspiring Stories about Moms and Motherhood. Unapologetic Voice House, The, 2020.
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House, The Unapologetic Voice, The Unapologetic Voice House e The Unapologetic Voice House. Passed down from Mom: A Collection of Inspiring Stories about Moms and Motherhood. Unapologetic Voice House, The, 2020.
Cerca il testo completoCapitoli di libri sul tema "Stories passed down"
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Schwarz, Christoph H. "Social Change and Generational Disparity: Education, Violence, and Precariousness in the Life Story of a Young Moroccan Activist". In Methodological Approaches to Societies in Transformation, 115–37. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-65067-4_5.
Testo completoAbstract (sommario):
AbstractThis chapter illustrates how social change can be assessed in biographical research by methodologically focusing on processes of intergenerational transmission in interviewees’ life stories, not only within the family but also in educational institutions and other contexts. The author illustrates this by reconstructing the political socialization and politicization of a young activist in Morocco’s Unemployed Graduates Movement and Amazigh Movement. Life stories not only allow long periods of social time and the historicity of social processes to be taken into account but also shed light on the conflicts that young people have to tackle before they can claim to be adults as defined in their particular social contexts. From this perspective, social change and the reconfiguration of power relations depend to a great extent on how societies organize and broker the transition to adulthood, and what particular type of young individuals are granted by their position at the intersections of class, gender, and ethnicity. By assessing the interviewees’ reinterpretation of the experiences, narratives, and traditions passed down to them by the older generation and reconstructing how they position themselves in a generation or generational unit, social change and the formation of new social and political subjectivities become empirically accessible as narrated patterns of social interaction.
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Bielejewski, Aaron. "Our Town: The Sociology of Policing Communities". In Holding down the Fort, 5–60. Wiesbaden: Springer Fachmedien Wiesbaden, 2022. http://dx.doi.org/10.1007/978-3-658-39773-9_2.
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AbstractMarshal Will Kane of Hadleyville, in the New Mexico Territory, has recently married and is looking forward to retirement and leaving his frontier town behind to open a store and raise a family. When word comes that the outlaw Frank Miller is returning to town and seeking vengeance against Kane, the marshal decides to remain on duty for one more day to prevent Miller and his gang from overrunning the town before the replacement marshal can arrive. Even as the judge who sentenced Miller to prison, the bitter deputy who was passed over for the job as marshal, and Will’s predecessor either refuse to help or prepare to flee the town, the marshal remains adamant.
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Wilde, Oscar. "The Master". In The Complete Short Stories. Oxford University Press, 2010. http://dx.doi.org/10.1093/owc/9780199535064.003.0022.
Testo completoAbstract (sommario):
Now when the darkness came over the earth Joseph of Arimathea,* having lighted a torch of pinewood, passed down from the hill into the valley. For he had business in his own home. And kneeling on the flint stones of the Valley of Desolation...
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Goff, James, e Walter Dudley. "Introduction". In Tsunami, 1–4. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197546123.003.0001.
Testo completoAbstract (sommario):
Tsunamis affect people—that is why researchers study them and why the media tracks their paths of destruction. A devastating tsunami is usually an event that is so far beyond people’s life experiences that they often struggle to rationalize what they saw. The destruction that has been wrought on human communities over the millennia is reflected in stories passed down either through word of mouth or in the writings of experts and non-experts alike. With an unprecedented wealth of previously unpublished tsunami survivor stories, the Introduction outlines the human side of these catastrophic events and what they mean to people. The basics of the tsunami warning system are introduced, as are some of the cases discussed in the book.
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Ellington, Linda. "Technology". In Handbook of Research on Education and Technology in a Changing Society, 104–15. IGI Global, 2014. http://dx.doi.org/10.4018/978-1-4666-6046-5.ch008.
Testo completoAbstract (sommario):
Thousands of years ago storytelling was available primarily in one format, the oral word passed down from generation to generation in order to communicate wisdom. Each of us represents the intersection of many generational stories blending fact and fiction. In the context of a continual search for ways to define, secure, and shape our existence, it is vital to expand the understanding of the evolving forms and applications of storytelling so societies can continue in the tradition of using stories to define, preserve, and shape society (Benjamin, 2006; Sax, 2006). This chapter looks at how technology impacts the practice of storytelling and how it affects not only the relationship with storytelling, the concept of the story itself, but also the practice of collaborative storytelling through the power of technology.
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Chatonnet, Françoise Briquel, e Muriel Debié. "The Solitaries". In The Syriac World, 61–82. Yale University Press, 2023. http://dx.doi.org/10.12987/yale/9780300253535.003.0003.
Testo completoAbstract (sommario):
This chapter discusses asceticism, an essential element of Syriac Christianity. Asceticism has left its mark on religious practice, literature, and ecclesiastical and social organization both in teaching and in written culture. The stories of solitaries who chose a life of poverty and chastity, both men and women, reflect a variety of ascetic practices. It was mostly in the monasteries where people learned to read and write, and mostly from among the monks that bishops and patriarchs were chosen—since, unlike priests, they had to be celibate—and consequently, it was mostly through monasteries that Syriac culture, both religious and profane, was written down and passed down to the present. Additionally, the chapter examines the motif of being strangers, which appears frequently in Syriac ascetic literature: just as Christ did not belong to the world, neither did ascetics.
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El-Shamy, Hasan. "The High Emprise far the Throne of Amon". In Popular Stories Of Ancient Egypt, 201–16. Oxford University PressNew York, NY, 2004. http://dx.doi.org/10.1093/oso/9780195173352.003.0017.
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Abstract THE second romance has come down to us in a Theban manuscript, which dates from the first half of the first century A.D. The fragments of it were bought from a dealer at Gizeh in 1904 by Borchardt and Rubensohn, and in 1905 by Seymour de Ricci. The larger part, which was acquired by Borchardt and Rubensohn, has gone to the University of Strasburg, where Spiegelberg discovered the subject of it. It has been published, as well as the pieces recovered by Ricci in W. Spiegelberg, Der Sagenkreis des Konigs Petubastis, nach dem Strassburger Demotischen Papyrus sowie den Wiener und Pariser Bruckstucken, 4to, Leipzig, 1910, So and 102 pages, and 22 plates in phototype. So far as it is possible to judge at present, it contains the Theban version of the theme dealt with in the first romance. The cuirass is replaced by the throne of Amon, probably, as I have said in the Introduction (p. cxxiii), by the sacred throne on which the priests placed the strangely shaped emblem, representing one of the types of the god of the Gr.-eco-Roman period. The personages that surround Pharaoh in the narrative are many of them the same as those of the previous story-Pakrur prince of the East, Pemu son of Eienharerou-Inaros prince of Heliopolis, Ankhhoru son of Pharaoh and his son Tak.hos, and Minnebmei prince of Elephantine; and yet, as Spiegelberg has justly observed (Der Sagenkreis, p. 8), years have passed since the affair of the cuirass, and new personages have arisen-Pesnufi, the son of Pakrur, and a young prophet of Horus of Buto who is not named anywhere, but whose auxiliaries are named generally as the Ameu. This name, which Spiegelberg translates literally as the Shepherds, and interprets as the Asiatics, affords the basis for a very ingenious comparison with the legend of Osarsuph, the priest of Heliopolis, the Moses of Jewish tradition, and his companions the shepherds or the Impure of Asia;
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He, Jianjun. "The Inner Tradition of Helü". In Spring and Autumn Annals of Wu and Yue, 64–104. Cornell University Press, 2021. http://dx.doi.org/10.7591/cornell/9781501754340.003.0005.
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This chapter suggests that Helü was considered a legitimate ruler in the Wu royal linage as he inherited the authority passed down from the founder Taibo and King Shoumeng. It recounts the reign of King Liao, which was treated as a transitional period much like the short-lived Qin dynasty. It also notes that the traditions of the Wu king Helü and his successor Fuchai are titled as the “inner tradition,” while the two kings from Yue, Wuyu, and Goujian, are identified as “outer tradition.” The chapter follows the chronology of King Helü's rule, wherein the structure continues the Shiji tradition and provides a comprehensive picture of the time. It examines a considerable number of stories that are supernatural nature or reflect strong yinyang and chenwei influences that were typical during the Eastern Han time, such as the Ganjiang casting swords.
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Hancock, Scott. "“Tradition Informs Us”: African Americans’ Construction of Memory in the Antebellum North". In Slavery, Resistance, Freedom, 40–69. Oxford University PressNew York, NY, 2007. http://dx.doi.org/10.1093/oso/9780195102222.003.0003.
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Abstract Sometime after the American Revolution, John Hancock presented a silk flag to a unique company of soldiers in recognition of their service. Like other soldiers, they had risked their lives. Their uniqueness stemmed not from the nature of their service but from the nature of their being. These soldiers were black. Some were likely former slaves, representing the hopes of thousands and crowning the ideals of the country—or at least, decades later, that is how they would be remembered, as this cherished flag and the stories it represented passed down to succeeding generations. In the antebellum United States, free black Northerners responded to challenges to their citizenship by arguing that they belonged in and to the United States. African Americans evoked their ancestors’ service to the country as soldiers and sailors during war, and as diligent, law-abiding workers during peace.
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Steinlauf, Michael C. "Jewish Theatre in Poland". In Polin: Studies in Polish Jewry Volume 16, 71–92. Liverpool University Press, 2003. http://dx.doi.org/10.3828/liverpool/9781874774730.003.0005.
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This chapter investigates how theatre found a place in pre-modern Jewish societies. This was nearly exclusively a result of its association with the Jewish holiday of Purim. Closely linked to the celebration of Purim in Ashkenazi communities at least as early as the mid-sixteenth century was the performance of a Purim play, or purim-shpil. The actors were yeshiva students or artisans; dressed as non-Jews and where necessary as women, the purim-shpilers marched through town, performing their play in the wealthier Jewish homes, occasionally on an improvised stage. In eastern Europe, by the nineteenth century, the purim-shpil had become the property of the lower classes; it was often staged annually by the same group of players, with parts and even costumes passed down from father to son. Some of these groups travelled and performed in neighbouring towns. The earlier purim-shpils were apparently skits parodying local events; from the mid-seventeenth century, they began to be based on biblical stories.
Atti di convegni sul tema "Stories passed down"
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Fan, Zhigang. "Unscreening digital stored halftone images by logic filtering". In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.thgg4.
Testo completoAbstract (sommario):
We present a new method for retrieving a continuous-tone picture from a digitally created and stored halftone image. It gives substantially better detail than the traditional low pass filtering approach. If the screen parameters are known (or estimated), the pixel value of the halftone (black or white) reveals the possible grey range of the pixel value (above or below the threshold) in the original continuous-tone image. The grey range obtained here is broad. It is narrowed down by logic filtering. The logic filtering is basically an operation combining the grey range data in the neighborhood of a pixel. Its adaptive nature makes it possible to remove the screen effects while retaining the edge information.
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Auerhammer, J. M., E. H. Haselhoff, G. M. H. Knippels, A. F. G. van der Meer, D. Oepts, H. H. Weits e P. W. van Amersfoort. "Fast manipulation of the gain medium of an infrared free electron laser". In The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1994. http://dx.doi.org/10.1364/cleo_europe.1994.cwm1.
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A free electron laser is similar to regular lasers in the sense that a light pulse is amplified on multiple passes through an optical cavity. Although the pump and gain processes are completely different, manipulation of the stored field is possible using similar tricks as in regular lasers, for instance phase locking by means of an intracavity interferometer.1,2 In addition, however, a free electron laser has the unique feature that also the properties of the gain medium (a beam of relativistic electrons) can be manipulated on a time scale essentially down to the cavity roundtrip time.
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Oka, Yasuhiro, e Akihiko Goto. "Research of Adhesive Effect Enhanced by Pounding Brush on Second Lining Pounding Procedure for Japanese Scrolls". In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37886.
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Hanging scrolls are a traditional Japanese ornamental art, which allow paintings and calligraphy to be unrolled and hung on a wall or in an alcove for display, and rolled up and stored in a box. Hanging scrolls should hang straight when unrolled, and roll smoothly for proper storage, without damaging the artwork beneath. For this purpose, scrolls are lined with several layers of Japanese paper, and adhered together with a weak, aged paste made from wheat starch, which gives the paper the flexibility required when the scrolls are rolled up for storage. While this old paste facilitates winding a scroll because it does not become hard even when dried, it does not have sufficient adhesive effect to grip Japanese paper. In order to increase the adhesive power of this aged paste, craftsmen employ a traditional technique of pounding the paper with a special “pounding brush.” This pounding technique is an important part of the fabrication process of hanging scrolls, but it is a difficult task for each generation to pass down the proper pounding technique. This study was intended to verify the effects of the pounding technique on aged paste and Japanese paper. We prepared samples with the pounding technique and investigated their adhesive properties of samples by peel text. In order to verify the importance of this traditional technique and the traditional materials, we compared and analyzed the differences in adhesion between craftsmen of different skill and differences introduced by paste concentration and backing paper quality.
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Sydykanov, Muratbek, Yerkin Bektay, Gaukhar Turysbekova, Adilkhan Baibatsha e Gurhan Yalcin. "APPLICATION OF BIOLEACHING OF COPPER FLOTATION TAILINGS". In 22nd SGEM International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022v/4.2/s18.03.
Testo completoAbstract (sommario):
The lack of new deposits with a rich copper content and the depletion of old deposits, as well as the need to comply with environmental requirements, raises the issue of the need to process the tailings of metallurgical industries. In Kazakhstan was accumulated significant stocks of tailings "Borgezsay" and "Staroye". The tailings reserves are estimated at up to 1 billion tons. Sample evaluation showed that the average copper content in the tailings is 0.15-0.2%. More than 1 million tons of copper are stored in this tailings. The complexity of the structure of minerals passes through the process of leaching of these wastes. Several types of leaching in sulfuric acid were considered for processing. Methods using chalcopyrite as a catalyst or dissolution with chlorides were not economically efficient. Studies have been carried out on the use of copper bioleaching. Bioorganisms destroy various minerals of metals, ensures the transition of metals into the leaching solution. Thionic bacteria Acidithiobacillus ferrooxidans were used. The strains of these iron-oxidizing bacteria occupy an exceptional position among thionic bacteria, since in addition to the ability to autotrophic growth due to the oxidation of sulfur compounds, they can use the energy of oxidation of ferrous iron. Studies have shown that the use of these bacteria can reduce the copper content in samples from 0.2% till 0.05%, in some cases down to 0.005%. Bioleaching carried out on various tailings samples showed the effectiveness of this method.
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Disher, Chris, e Larry Harthorn. "Mobile Marine Riser Inspection and Management Program". In ASME 2003 22nd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2003. http://dx.doi.org/10.1115/omae2003-37134.
Testo completoAbstract (sommario):
The new R.A.D.A.R. (Riser Active Data Acquisition Recorder) program allows for full marine drilling riser inspection while the joints are stacked on the deck of the rig with no disassembly. With the utilization of ultrasonics, robotic tools have been developed to pass through the inside diameter of the main tube and auxiliary lines to obtain potentially thousands of pipe wall readings and to record the weld integrity of each weld. The tools are also capable of video recording the pipe interior. Trained inspectors complete the riser survey with dimensional, visual, and magnetic particle inspections on the end connections of the main tube and auxiliary lines. Inspection data is compiled and stored in a database and is added to previous inspections and will be utilized for trend analysis. Using statistical methods the inspection history can predict trends of riser life and the potential for future repairs. This will assist operators to predict riser repairs, out of service time, cost of repairs, and most importantly eliminate extremely costly rig down time. The RADAR program has successfully inspected over 110,00 feet of pipe since its inception in September 2001.
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Huang, Chen-Kang. "Adsorption Cooling With Multi-Stage Desiccant Processes". In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-64480.
Testo completoAbstract (sommario):
For traditional adsorption cooling systems using silica-gel-like desiccant wheels, the moisture is removed from the air and stored in the desiccant wheels. The subsequent reactivation process is to dry the wheel by blowing hot air. The moisture is added to the dried air to take the advantage of evaporative cooling. Currently, the two processes are performed on the different sections of a wheel. However, the temperature of the reactivated part will be higher, and the residual heat will be dissipated into the air-conditioning space. Some researchers have reported to add another section to cool down the regenerative part. Unfortunately, the addition of cooling section decreases the working durations of other two sections. In this study, a novel desiccant-evaporative cooling process is proposed. The wheel is now stationary. Fans and air doors were designed to adjust various air flows to pass through the wheel to perform the dehumidifying, reactivation, and cooling inside the wheel. Most importantly, for each period, the desiccant wheel was used only to dehumidify, reactivate, or cool down. The air to cool the desiccant wheel was released outside, so no residual heat went to the air-conditioning space. The outdoor air was acquired to be heated and reactivate the desiccant wheel. The indoor was used to cool the wheel to achieve better cooling effects. An experimental prototype was designed and established. The air could be directed through the desiccant wheel. A controller was installed. The duration of the dehumidifying, reactivation, and cooling process could be set on the panel. The evaporative cooling process was performed by ten ultrasonic humidifiers. The hot air was from a liquid-to-air heat exchanger, and the hot water can be from a solar heater or any waste heat sources. Optimized sets of period durations were suggested. The criteria to end each process have been proposed for future automation. It is shown that the novel design is able to deliver cooler air. Although the cool air output is currently intermittent, a solution has been figured out and will be improved soon.
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Ekeregbe, Merit P., Mina S. Khalaf e Robello Samuel. "Dull Bit Grading Using Video Intelligence". In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206254-ms.
Testo completoAbstract (sommario):
Abstract Although visual data analytics using image processing is one of the most growing research areas today and is largely applied in many fields, it is not fully utilized in the petroleum industry. This study is inspired by medical image segmentation in detecting tumor cells. This paper uses a supervised Machine Learning technique through video analytics to identify bit dullness that can be used in the drilling industry in place of the subjective screening approach. The evaluation of bit performance can be affected by subjective evaluation of the degree of dullness. The present approach of using video analytics is able to grade bit dullness to avoid user subjectivity. The approach involves the use of datasets in good quantity and quality by separating them into training datasets, testing datasets, and validation datasets. Due to the large datasets, Google Collaboratory was used as it provides access to its Graphic Processing Unit (GPU) online for the processing of the bit datasets. The processing time and resource consumption are minimized using Google GPU. Using the Google GPU resources, the procedure is automated without any installation. After the bit is pulled out and cleaned, a video is taken around and up and down in 360°. Further, it is compared against the green bit. By this approach, multiple video datasets are not required. The algorithm was validated with new sets of bit videos and the results were satisfactory. The identification of the dullness or otherwise of each screened bit is done with the aid of a bounding box with a stamp of a level of confidence (range 0.5–1) and the algorithm assigns for its decision on the identified or screened object. This method is also able to screen multiple bits stored in a single place. In an event where several drill bits are to be screened, manual grading will be a huge task and will require a lot of resources. This model and algorithm will take a few minutes to screen and provide grading for several bits while videos are passed through the algorithm. It has also been found that the grading with the video was much better than the single image as the contextual information extracted are much higher at the level of the entire video, per segment, per shot, and per frame. Also, methodology is made robust so that the video model test starts successfully without error. The time penalty for the processing is fast and it took less time for a single video screening. The work developed here is probably the first to handle the dull bit grading using video analytics. With more of these datasets available, the future automation of the IADC bit characterization will soon evolve into an automated process.
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Woerner, Joerg, Sonja Margraf e Walter Hackel. "Remediation of a Uranium-Contamination in Ground Water". In The 11th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2007. http://dx.doi.org/10.1115/icem2007-7270.
Testo completoAbstract (sommario):
The former production site of NUKEM where nuclear fuel-elements were developed and handled from 1958 to 1988 was situated in the centre of an industrial park for various activities of the chemical and metallurgical industry. The size of the industrially used part is about 300.000m2. Regulatory routine controls showed elevated CHC (Chlorinated Hydro-Carbons) values of the ground water at the beginning of the 1990’s in an area which represented about 80.000 m2 down-gradient of locations where CHC compounds were stored and handled. Further investigations until 1998 proved that former activities on the NUKEM site, like the UF6 conversion process, were of certain relevance. The fact that several measured values were above the threshold values made the remediation of the ground water mandatory. This was addressed in the permission given by the Ministry for Nuclear Installations and Environment of Hesse according to §7 of the German atomic law in October 2000 [1]. Ground water samples taken in an area of about 5.000 m2 showed elevated values of total Uranium activity up to between 50 and 75 Bq/l in 2002. Furthermore in an area of another 20.000m2 the samples were above threshold value. In this paper results of the remediation are presented. The actual alpha-activities of the ground waters of the remediation wells show values of 3 to 9Bq/l which are dominated by 80 to 90% U-234 activity. The mass-share of total Uranium for this nuclide amounts to 0,05% on average. The authority responsible for conventional water utilisation defined target values for remediation: 20μg/l for dissolved Uranium and 10μg/l for CHC [2]. Both values have not yet been reached for an area of about 10.000 m2. The remediation process by extracting water from four remediation wells has proved its efficiency by reduction of the starting concentrations by a factor of 3 to 6. Further pumping will be necessary especially in that area of the site where the contaminations were found later during soil remediation activities. Only two wells have been in operation since July 2002 when the remediation technique was installed and an apparatus for direct gamma-spectroscopic measurement of the accumulated activities on the adsorbers was qualified. Two further remediation wells have been in operation since August 2006, when the installed remediation technique was about to be doubled from a throughput of 5 m3/h to 10 m3/h. About 20.000 m3 of ground water have been extracted since from these two wells and the decrease of their Uranium-concentrations behaves similar to that of the two other wells being extracted since the beginning of remediation. Both, total Uranium-concentrations and the weight-share of the nuclides U-234, U-235 and U-238 are measured by ICP-MS (Inductively Coupled Plasma – Mass Spectrometry) besides measurements of Uranium-Alpha-Activities in addition to the measurement of CHC components of which PCE (Perchlor-Ethene) is dominant in the contaminated area. CHC compounds are measured by GC (Gas Chromatography). Down-gradient naturally attenuated products are detected in various compositions. Overall 183.000m3 of ground water have been extracted. Using a pump & treat method 11 kg Uranium have been collected on an ion-exchange material based on cellulose, containing almost 100 MBq U-235 activity, and almost 15 kg of CHC, essentially PCE, were collected on GAC (Granules of Activated Carbon). Less than 3% of the extracted Uranium have passed the adsorber-system of the remediation plant and were adsorbed by the sewage sludge of the industrial site’s waste water treatment. The monthly monitoring of 19 monitoring wells shows that an efficient artificial barrier was built up by the water extraction. The Uranium contamination of two ground water plumes has drastically been reduced by the used technique dependent on the amounts of extracted water. The concentration of the CHC contamination has changed depending on the location of temporal pumping. Thereby maximum availability of this contaminant for the remediation process is ensured. If locations with unchanged water quality are detected electrochemical parameters of the water or hydro-geologic data of the aquifer have to be taken into further consideration to improve the process of remediation.
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Agofack, Nicolaine, Hoang Nguyen Hoang, Pierre Cerasi, Anna Stroisz e Marcel Naumann. "Effect of Supercritical CO2 and Thermal Loading Cycles on Class G Well Cement Properties". In 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0439.
Testo completoAbstract (sommario):
ABSTRACT In carbon dioxide (CO2) capture and storage (CCS) technology, one of the goals is to prevent the injected CO2 from leaking back into the atmosphere. The leakage paths include fractures on the cement sheath sealing the injection well and/or reactivated faults going through the caprock. During a batch-wise injection of CO2, the wellbore is submitted to thermal loading cycles. After injection, the near-well materials, including cement sheath, are exposed to a CO2-rich environment, especially in the vicinity of the reservoir. These thermal cycles (TC) and exposure environment can affect the properties of the sealing material like cement and create leakage paths. Portland G cement samples were submitted to TC and exposed to a supercritical CO2 environment, respectively. The results show that after submitting to more than 100 TC, the strength of the cement sample can decrease by 40% and its Young's modulus by 20%. On the other hand, after exposure to supercritical CO2 for 52 days, the strength of the cement can increase up to 170% and its Young's modulus up to 25%, depending on the cement slurry formulation. INTRODUCTION Cement paste in CCS wells can experience different mechanical and thermal loadings. During hydration, the cement pastes are also exposed to various temperature conditions. After well construction, when cement hydration takes place, the cured cement is submitted to thermal cyclic loadings following a batchwise CO2 injection. Injected from the seabed at a 4°C, the CO2, while going down along the well into the reservoir, cooldown the wellbore and its surroundings to a temperature much lower than the in-situ one. During maintenance or when shifting from one batch to another, the wellbore temperature will raise again towards its initial in-situ value. These thermal loadings can significantly affect the properties of the cement sheath, compromise its integrity by creating leakage paths for the stored CO2 to escape the reservoir. Previous investigations have shown that properties of cement and cement-sand mixture are highly affected when exposed to high temperatures (Cao et al., 2022; Dillenbeck et al., 2002; Milestone et al., 2012; Mindeguia et al., 2010; Peng & Huang, 2008; Rimmelé et al., 2008; Urbonas et al., 2016; Vu, 2013; Zeng et al., 2022). In the case of a leakage path in the cement sheath, remedy solutions include squeeze cementing operations. This consists of performing a perforation to the casing and squeezing cement slurry to seal the leakage paths (Manceau et al., 2014; Todorovic et al., 2016). For remediation of CO2 leakage, part of the squeezed cement slurry may be hydrated while exposed to CO2. A CO2-rich environment is expected to influence the properties of the hydrating cement. Some publications indicate that cement carbonation increases with relative humidity (RH) (Hunt et al., 1958). It is very slow for RH lower than 25% and highly enhanced for RH higher than 90%. The same authors demonstrate a smaller amount of non-evaporable water after hydration accompanied by CO2 exposure for more carbonated cement. According to Fabbri et al. (2009), Johannesson & Utgenannt (2001) and Milestone et al. (2012), the mechanism of carbonation is a chemical reaction of calcium hydroxide and calcium silicate hydrates with CO2. Calcium ions (Ca2+) migrate through a saturated porous medium, leaving a leached zone and then rapidly precipitate as calcium carbonate (CaCO3) when meeting the dissolved CO2 (Fabbri et al., 2009; Johannesson & Utgenannt, 2001; Milestone et al., 2012). After exposing hardened cement and mortar samples to scCO2 for only four hours, significant strength increase and porosity reduction were observed (Urbonas et al., 2016). According to these authors, these changes result from carbonation which leads to microstructure change. Dillenbeck et al. (2002) showed that the carbonation depth is higher in ordinary Portland cement (OPC) with fly-ash (FA/OPC) than in OPC alone. In both cement systems, it increases with the exposure time. Consequently, the compressive strength of OPC cement increased after exposure to CO2 for up to 6 months and then decreased afterwards (Dillenbeck et al., 2002). After exposing Portland cement G to wet CO2 and CO2-saturated water under the pressure of 280 bars and temperature of 90°C, Rimmelé et al. (2008) measured a reduction in the porosity after 3 weeks (resp. 6 weeks) of exposure to CO2-saturated water (resp. wet CO2). Eventually, the porosity increased to a final value, lower than the reference one, after 6 months of exposure. Many of these investigations are rather limited to microstructure analysis in terms of mineral changes or compressive strength. The stiffness of the material, as well as the dynamic properties, are rarely investigated. In this campaign, different cement formulations, hydrated under different conditions and subjected to many thermal loading cycles are tested. Compressive strength, porosity, stiffness and density change after scCO2 exposure and temperature treatment were measured.