Relevant bibliographies by topics / Holy cows

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Holy cows'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "Holy cows"

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van Praag, H. M. "On holy cows and golden calves." Acta Neuropsychiatrica 15, no. 1 (February 2003): 22–25. http://dx.doi.org/10.1034/j.1601-5215.2003.00005.x.

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Luft, Friedrich C. "The ?holy cows? of Ole F�rgeman:." Journal of Molecular Medicine 82, no. 4 (April 1, 2004): 211–13. http://dx.doi.org/10.1007/s00109-004-0524-5.

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Attanasio, Orazio, and Britta Augsburg. "Holy Cows or Cash Cows? The Economic Return to Livestock in Rural India." Economic Development and Cultural Change 66, no. 2 (January 2018): 307–30. http://dx.doi.org/10.1086/695138.

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Reddy, Rajyashree N. "OF HOLY COWS AND UNHOLY POLITICS : Dalits, Annihilation and More‐than‐Human Urban Abolition Ecologies." International Journal of Urban and Regional Research 45, no. 4 (July 2021): 643–57. http://dx.doi.org/10.1111/1468-2427.13028.

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Sharma, Kennedy, Schuetze, and Phillips. "The Welfare of Cows in Indian Shelters." Animals 9, no. 4 (April 16, 2019): 172. http://dx.doi.org/10.3390/ani9040172.

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Cow shelters (gaushalas) are unique traditional institutions in India, where aged, infertile, diseased, rescued, and abandoned cows are sheltered for the rest of their life, until they die of natural causes. These institutions owe their existence to the reverence for the cow as a holy mother goddess for Hindus, the majority religion in India. There is a religious and legal prohibition on cow slaughter in most Indian states. A cross-sectional study was conducted to assess the welfare of cows in these shelters, which included the development of a welfare assessment protocol, based on direct animal-based measurements, indirect resource-based assessments, and description of the herd characteristics by the manager. A total of 54 cow shelters in 6 states of India were studied and 1620 animals were clinically examined, based on 37 health, welfare, and behavior parameters. Thirty resources provided to the animals, including housing, flooring, feeding, watering, ease of movement, cleanliness of facilities, lighting, temperature, humidity, and noise levels in the sheds were measured. The study showed that the shelters contained mostly non-lactating cows, with a mean age of 11 years. The primary welfare problems appeared to be different to those in Western countries, as the major issues found in the shelters were facility-related—the low space allowance per cow, poor quality of the floors, little freedom of movement, and a lack of pasture grazing. Very few cows were recorded as lame, but about one half had carpal joint hair loss and swelling, and slightly less had lesions from interacting with shelter furniture. Some shelters also had compromised biosecurity and risks of zoonosis. These issues need to be addressed to aid in ensuring the acceptability of these institutions to the public. This welfare assessment protocol aims to address the welfare issues and problems in the shelters, by providing feedback for improvement to the stakeholders.
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Iversen, Hans Raun. "Kirkebygninger i religionsmodellens grænseflade. Mellem fælles kulturarv og folkekirkeligt magtmonopol." Religionsvidenskabeligt Tidsskrift, no. 62 (November 20, 2015): 29. http://dx.doi.org/10.7146/rt.v0i62.22567.

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The organization and work of The Danish National Church form the core of the Danish model of religion. One might, therefore, think that this would also include the church buildings used by the church. I argue that the church buildings used by The National Church and especially the pre-Reformation buildings are placed in the borderland of the Danish model of religion, since they belong to the common cultural heritage although they are administered by the church. I analyze the historically conditioned ownership followed by an outline of the interpretations of the buildings endorsed by respectively the official church and its members. The special situation pertinent to the church buildings of Copenhagen is described before the final analysis of the principles underlying the decision by the Minister of Cultural Affairs on the bishop’s suggestion to close down 14 churches in Copenhagen in 2013. I conclude that church buildings in Denmark hold a status similar to holy cows in India.Folkekirkens organisation og virksomhed udgør den danske religionsmodels kerneområde. Herudfra slutter man let, at det også må gælde de kirkebygninger, som folkekirken gør brug af. Det er denne artikels tese, at folkekirkens kirkebygninger, og særligt den dominerende del af dem, som er bygget før reformationen, hører hjemme i den danske religionsmodels grænseflade. Dette fordi de tilhører den fælles kulturarv, selv om de er undergivet folkekirkelig administration. Artiklen beskriver først bygningernes historisk betingede ejendomsretlige status, dernæst den folkelige og kirkelige tolkning af bygningerne, og endelig redegøres der for de særlige forhold omkring kirkerne i København. Til sidst analyseres de principielle retningslinjer om kirkebygninger, der kommer til orde gennem Kulturministerens afgørelse af 14 kirkelukningssager i Københavns Stift i 2013. Konklusionen lyder, at kirkebygningernes status i Danmark er sammenlignelig med de hellige køers status i Indien
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Arukask, Madis. "The materiality of the letter in Seto oral culture." Multilingua 40, no. 4 (May 31, 2021): 537–63. http://dx.doi.org/10.1515/multi-2020-0067.

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Abstract This article focuses on the concept of letter in oral folklore. The main research material is examples from the older folk songs of Seto, where a letter, a book and other items referring to literacy are mentioned. Texts under consideration are poetical and the meaning conveyed in them is not always very clear. The term letter may be related to a message, paper, book, leaf or other material medium in the songs. The boundary between oracy and literacy is therefore thin, given that letters and writing are often imagined and conveyed in a physical context. Literacy in Seto folk songs is sometimes reflected as part of mythological knowledge and a mythological worldview. The written text or objects carrying it may have magical power. In some songs the writing can also be found on plants, which is interesting from a cross-cultural perspective. Similar motives from the folklore and beliefs of other peoples have been used comparatively to understand the content of the songs under consideration. The song of heavenly cows eating holy plants offers an opportunity to draw intercultural parallels and raises the question about the ethnogenesis of the Seto and their relatedness to different Eurasian peoples further to the east.
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Donoghue, Mandana, Amit Chawla, and KP Mohan. "CANCER STEM CELLS: HAVE WE FOUND THE HOLY GRAIL OF ONCOLOGY?" CODS Journal of Dentistry 3, no. 1 (2011): 46–50. http://dx.doi.org/10.5005/cods-3-1-46.

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Yuskiv, L. L., V. V. Vlizlo, and N. R. Motko. "D-vitamin status of cattle depending on the conditions of detention and physiological state." Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 21, no. 96 (December 14, 2019): 124–28. http://dx.doi.org/10.32718/nvlvet9622.

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The article contains data on the content of the active metabolite of vitamin D3 – 25-OHD3, the concentration of calcium, phosphorus, magnesium and the activity of alkaline phosphatase in the blood of lactating cows in different periods of keeping. The experiment was performed by the method of periods on the cows-analogues for the 4th month of lactation. Cows are divided into three groups of five heads, each depending on the sampling period: winter stall (January), summer pasture (July) and autumn stall (October) for one year. The blood for tests was collected from the jugular vein before morning feeding in winter-stall, summer-pasture, and autumn-stall hold periods. The composition and nutrition of the diets of cows were also analyzed. Changes in the content of 25-OHD3 in the blood of cows were determined depending on the season and conditions of keeping. The lowest level of 25-OHD3 was in the winter-stall holding period and was 22.38 ± 3.58 nmol/l and the highest was in the summer pasture. In the autumn-stall period, the level of 25-OНD3 decreased relative to the summer pasture, but was higher than in the winter-stall (P < 0.05). The total calcium content of the serum of cows was highest in the summer pasture and winter-stallion periods and was, respectively, 2.96 and 2.90 mmol/l. In the autumn-stalling period, the total calcium content decreased and was significantly lower compared to the summer pasture period (P < 0.05). Changes in the total calcium content of cows' blood during different retention periods were due to changes in its fractions. The activity of total alkaline phosphatase and its bone isoenzyme in the blood of cows at 4 months of lactation varied in contrast to the content of 25-OНD3.
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Yildirim, Onur, Matteo Bonomo, Nadia Barbero, Cesare Atzori, Bartolomeo Civalleri, Francesca Bonino, Guido Viscardi, and Claudia Barolo. "Application of Metal-Organic Frameworks and Covalent Organic Frameworks as (Photo)Active Material in Hybrid Photovoltaic Technologies." Energies 13, no. 21 (October 26, 2020): 5602. http://dx.doi.org/10.3390/en13215602.

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Metal-organic frameworks (MOFs) and covalent organic frameworks (COFs) are two innovative classes of porous coordination polymers. MOFs are three-dimensional materials made up of secondary building blocks comprised of metal ions/clusters and organic ligands whereas COFs are 2D or 3D highly porous organic solids made up by light elements (i.e., H, B, C, N, O). Both MOFs and COFs, being highly conjugated scaffolds, are very promising as photoactive materials for applications in photocatalysis and artificial photosynthesis because of their tunable electronic properties, high surface area, remarkable light and thermal stability, easy and relative low-cost synthesis, and structural versatility. These properties make them perfectly suitable for photovoltaic application: throughout this review, we summarize recent advances in the employment of both MOFs and COFs in emerging photovoltaics, namely dye-sensitized solar cells (DSSCs) organic photovoltaic (OPV) and perovskite solar cells (PSCs). MOFs are successfully implemented in DSSCs as photoanodic material or solid-state sensitizers and in PSCs mainly as hole or electron transporting materials. An innovative paradigm, in which the porous conductive polymer acts as standing-alone sensitized photoanode, is exploited too. Conversely, COFs are mostly implemented as photoactive material or as hole transporting material in PSCs.
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Dissertations / Theses on the topic "Holy cows"

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Li, Yilu, and 李依璐. "An Approach to English-to-Chinese Translation of Cross-cultural Novel: Sarah Macdonald’s “Holy Cow: An Indian Adventure” as a Case Study." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/10992088210250670236.

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碩士
長榮大學
翻譯學系碩士班
100
The aim of this thesis is to translate and study Sarah Macdonald’s travel literature, Holy Cow: An Indian Adventure. I translate the first chapter of this novel and apply translation theories and techniques to discuss the first draft of my translation and the difficulties I encountered during translating. This thesis is divided into five chapters. Chapter one is an introduction to my study motives, purposes of translating this book, and an explanation of my study methods. Chapter two introduces the works and translations of travel literature and briefly introduces Sarah Macdonald and her books. In Chapter three, I review and discuss Peter Newmark’s and Lawrence Venuti’s translation theories to propose the strategies for translating this book and analyzing my first draft. In Chapter four, I use translation techniques to discuss the cause of and how to solve difficulties in translation. Chapter five is a conclusion of this thesis, including my comments on the some important points of this study and my suggestions for translating intercultural literature.
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Books on the topic "Holy cows"

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Holy cow: Indian political chessboard. Delhi: Media House, 2015.

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The myth of the holy cow. New Delhi: Navayana Pub., 2009.

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Holy cow: Beef in Indian dietary traditions. New Delhi: Matrix Books, 2002.

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Mayson, Cedric. Jesus and the holy cows: The message of Jesus for today's world. Basingstoke, Hants, UK: Marshall Pickering, 1987.

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Salatin, Joel. Holy cows and hog heaven: The food buyer's guide to farm friendly food. Swoope, Va: Polyface, 2004.

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Miles, Jerry. Holy cow! Las Vegas, NV: Stephens Press, 2008.

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Bob, Verdi, ed. Holy cow! New York: Villard Books, 1989.

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ill, Foster Wil, ed. Hamburger? Holy cow! Indianapolis, Ind: Wesleyan Pub. House, 2000.

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Flann, O'Riain, ed. Holy cow, sin ceann mór. Baile Átha Cliath: Coiscéim, 1991.

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Holy Cow: An Indian adventure. New York: Broadway Books, 2003.

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Book chapters on the topic "Holy cows"

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Ahuja, Juhi. "Protecting holy cows." In Vigilantism against Migrants and Minorities, 55–68. Abingdon, Oxon; New York, NY : Routledge, 2019. | Series: Routledge studies in fascism and the far right: Routledge, 2019. http://dx.doi.org/10.4324/9780429485619-4.

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Pfitzner, Judith. "Holy Cow!" In Animals and their Relation to Gods, Humans and Things in the Ancient World, 137–73. Wiesbaden: Springer Fachmedien Wiesbaden, 2019. http://dx.doi.org/10.1007/978-3-658-24388-3_7.

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Friedman, Mark T., Kamille A. West, Peyman Bizargity, Kyle Annen, and Jeffrey S. Jhang. "Holy Cow! (“I’m Bloodless”)." In Immunohematology and Transfusion Medicine, 323–27. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-90960-8_56.

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HARRIS, C. W., and J. W. DUCK. "COW HOLE." In Mendip, 50–55. Elsevier, 2013. http://dx.doi.org/10.1016/b978-1-4831-6773-2.50010-8.

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Tsika, Noah. "From Kiddie Cops to the Coal Police." In Screening the Police, 257–90. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197577721.003.0007.

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In the United States, the normalization of police power has often demanded the delineation of fraudulent or otherwise illegitimate aspirants to such power. This chapter considers cinematic depictions of parapolicing. Such representations speak to ongoing anxieties surrounding the actual, discernable contours of police power in the United States. In Hollywood, the Studio Relations Committee was particularly wary of analogies between “real” police officers and their privately employed counterparts. The films examined in this chapter address the complexities of those public-private partnerships that pivot around law enforcement. Ultimately, these films work to affirm the state’s monopoly on lawful violence, either because it is the state itself that “generously” grants power to particular private actors or because those private actors fail miserably and, in so doing, necessitate the expansion of “real” police forces. Such films complicate, in markedly populist terms, the professional police’s presumed monopoly on expertise, without, however, questioning the police’s monopoly on violence. The films at the center of this chapter are meant to show that while policing may be teachable—imitable—actual law enforcement officials hold the real power.
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Helms, Robin Matross. "Hao, ma? vs. Hola: The Pros and Cons of Less Commonly Taught." In Inhabiting the Borders, 123–42. Routledge, 2020. http://dx.doi.org/10.4324/9781003062004-6.

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Mason, Cecily, Tanya Castleman, and Craig Parker. "Creating Value with Regional Communities of SMEs." In Global Information Technologies, 2144–50. IGI Global, 2008. http://dx.doi.org/10.4018/978-1-59904-939-7.ch154.

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This article provides a conceptual argument that the knowledge management (KM) approach of communities of practice (CoPs), and their virtual equivalents (VCoPs), can create value for clusters of regional small and medium enterprises (SMEs). The article firstly shows that value creation in regional clusters occurs by encouraging collective learning and reciprocal knowledge exchange. The article then shows that CoPs, and VCoPs in particular, have been the most successful value creation mechanism in large organisations. We argue that VCoPs hold considerable potential for value creation in regional clusters of SMEs by promoting innovation, more effective knowledge sharing, and recognising the value of VCoPs as capital. The strategic integration of SMEs in regional clusters is analogous to large organisations’ global operations. In this environment VCoPs combine industry-specific knowledge with firm specific knowledge and emerge as a new source of social capital.
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Bodea, Constanta-Nicoleta, Radu Mogos, and Maria-Iuliana Dascalu. "How e-Learning Experience Enhances the Social Presence in Community of Practice." In Virtual Community Building and the Information Society, 75–120. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-60960-869-9.ch005.

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The chapter presents a study made in order to find out how the e-learning experience enhances the social presence in the community of practice. The study was carried out for the online master degree programme in project management, delivered by the Academy of Economic Studies, Bucharest. The main research method was a survey and the research instrument was a questionnaire. Statistics and data mining were applied. Statistics was applied to check hypothesis and quantify the correlation significance. Due to the large number of the variables and the indirect relationships, the analysis paths become very complex and it would be extremely difficult to manage the analysis workflow. So, the data mining approach was chosen. As a theoretical framework and analytical perspective for this research, Wenger’s theories of learning in Community of practice (CoP), and the social presence model of Garisson et al., are applied. The study revealed that the characteristics of the online social presence in learning environments enhanced the students’ interest for CoPs. Another finding of this study is that for project management area there is not a significant correlation between the learning domain and that of the CoPs chosen to get involved. The reason is that most of the project personnel hold a first degree in an area other than project management.
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Dua, Shelza, Bharath Nancharla, and Maanak Gupta. "Cosine Transformed Chaos Function and Block Scrambling-Based Image Encryption." In Handbook of Research on Machine Learning Techniques for Pattern Recognition and Information Security, 121–38. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-3299-7.ch008.

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The authors propose an image encryption process based on chaos that uses block scrambling to reduce the correlation among the neighboring pixels and random order substitution for slightly changing the value of the pixel. The chaotic sequence for encrypting the image is generated by using two 3D logistic maps called enhanced logistic map and intertwining logistic map; the cos function helps in reducing linearity. The entire encryption process is composed of scrambling, image rotation, and random order substitution. Scrambling is used for permuting the pixels in the image so that we can reduce the correlation among the neighboring pixels, and this is followed by image rotation which can ensure that shuffling of pixels is done to the remaining pixels in the image, and at last the authors use random order substitution where they bring the small change in the pixel value. The proposed method has the capability of encrypting digital colored images into cipher form with high security, which allows only authorized ones who hold the correct secret key to decrypt the images back to original form.
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Berk, Laura E. "Learning Through Make-Believe Play." In Awakening Children's Minds. Oxford University Press, 2001. http://dx.doi.org/10.1093/oso/9780195124859.003.0008.

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Two days a week, Kevin leaves his office 45 minutes early to take charge of his 2-year-old daughter, Sophie, while her mother, a university professor, teaches a late class. One balmy spring afternoon, Kevin retrieved Sophie at her child-care center and drove the 15-minute route home. Invited to look in on Sophie’s play, I met the pair at the front door and nestled into a rocking chair from which to observe unobtrusively. After downing the last bite of her snack, Sophie grabbed Kevin’s hand and led him across the family room to a rug lined on two sides by shelves filled with books, stuffed animals, and other play props. Sophie moved a toy horse and cow inside a small, enclosed fence that she and Kevin had put together the day before. Then she turned the animals on their sides and moved them toward each other. “Why are horse and cow lying down?” Kevin asked. “’Cause they’re tired,” Sophie answered, pushing the two animals closer together. “Oh, yes,” Kevin affirmed. Then, building on Sophie’s theme, he placed a teddy bear on another part of the rug and offered, “I think Ted’s tired, too. I’m going to start a bed over here for some other animals.” Sophie turned toward the teddy bear, lifted his paw, and exclaimed, “She wants a lollipop to hold in her hand!” “A lollipop in her hand? We haven’t got any lollipops, have we?” answered Kevin. “Laura has!” declared Sophie, glancing at me. “Has Laura got a lollipop?” Kevin queried. “Yes! She’s got all of those, and a swing and a table, too!” Sophie remarked, referring to my chair, which rocked back and forth next to an end table. “Maybe this could be a make-believe lollipop,” suggested Kevin, placing a round piece on the end of a long TinkerToy stick and handing the structure to Sophie “That’s a lollipop,” agreed Sophie, placing it in the paw of the teddy bear. “Can she suck that while she’s going off to sleep?” asked Kevin. “Do you think that’s what she wants?” “It’s a pacifier,” explained Sophie, renaming the object.
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Conference papers on the topic "Holy cows"

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Beinhauer, Rupert. "HOLY COWS. THE APPLICATION OF THE PRINCIPLES OF CONNECTIVISM ON THE DESIGN OF A STUDENT CENTRED AND OUTPUT ORIENTED LEARNING ACTIVITY, USING THE EXAMPLE OF AN EXERCISE FOR UNDERGRADUATE BUSINESS STUDENTS IN AUSTRIA AND INDIA." In International Conference on Education and New Learning Technologies. IATED, 2017. http://dx.doi.org/10.21125/edulearn.2017.1123.

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Erixån, Annika. "Holy Cow." In ACM SIGGRAPH 2004 Art gallery. New York, New York, USA: ACM Press, 2004. http://dx.doi.org/10.1145/1185884.1185911.

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Wang, Jianxin, Ping An, Yifan Zuo, Zhixiang You, and Zhaoyang Zhang. "High accuracy hole filling for Kinect depth maps." In SPIE/COS Photonics Asia, edited by Qionghai Dai and Tsutomu Shimura. SPIE, 2014. http://dx.doi.org/10.1117/12.2071437.

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Chen, Weijuan, Yuanyuan Lin, Guimin Lin, Ping Fu, Chengkun Liu, Yishen Qiu, Hui Li, and Xiyao Chen. "1×5 optical splitter for TE modes in air-hole photonic crystal based on self-collimation effect." In SPIE/COS Photonics Asia, edited by Zhiping Zhou and Kazumi Wada. SPIE, 2016. http://dx.doi.org/10.1117/12.2245664.

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Qian Zhao, Chao Li, Yun-Song Zhou, and Huai-Yu Wang. "Investigation of the polarization dependence of the optical transmission in subwavelength metal hole array." In 2010 OSA-IEEE-COS Advances in Optoelectronics and Micro/Nano-Optics (AOM). IEEE, 2010. http://dx.doi.org/10.1109/aom.2010.5713557.

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Alford, Laura K., Robert F. Beck, Joel T. Johnson, David Lyzenga, Okey Nwogu, and Alan Zundel. "A Real-Time System for Forecasting Extreme Waves and Vessel Motions." In ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-42420.

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The University of Michigan is leading a team that includes subcontractors Ohio State University, Aquaveo, LLC, and Woods Hole Oceanographic Institute to design, implement, and test an Environmental and Ship Motion Forecasting (ESMF) system. The system has application to many challenges associated with offshore operations, including skin-to-skin transfer of cargo/personnel and extreme wave/response prediction. Briefly, the system uses a modified commercial-off-the-shelf (COTS) Doppler marine radar to determine the wave field surrounding the vessel; nonlinear wave theory to propagate the wave surface forward in time; and seakeeping theory to predict future vessel motions. A major challenge is that all computations must be done in real time. This paper will briefly describe the system and show an example application of predicting extreme waves and motions for a floating offshore type platform.
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Ishihara, Ryujiro, Naohide Higuchi, and Yohei Mikami. "Application of the Jet Pump to the Slim Hole Production Wells at Onshore Thailand." In International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21345-ms.

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Abstract This is a case study to establish the positive result of an artificial lift application of the jet pump (JP) system using the coiled tubing (CT) and the macaroni tubing (MT). It is applied to the monobore completions for the slim-hole production wells on BURAPA-A oil field, onshore Thailand, implemented by Siam Moeco Ltd. (SML, Affliated Company of Mitsui Oil Exploration Co., Ltd.). As a result of the JP introduction, the resulting production decline rate was lower and the recovery factor more than doubled, which extended field life longer than expected. SML succeeded in discovering the method to minimize the capital cost while maximizing the oil recovery with the JP system. This method has given us the chance to conduct a smaller-scale well intervention operation with only minor modification of the wellhead. We believe that it is an adequate artificial lift application for the small-size oil field. Some important lessons for the small pipe size operations were learned in this process. A pin-hole leak was detected in the CT for the main production well due to erosion and corrosion by continuous high-pressure pumping for around two years after the installation of the JP completion. After reviewing the new completion design, the type of deployment pipe was converted to the MT, which is thicker and has higher integrity than the CT. Consequently, there have been no integrity issues for the deployment pipes since the production was resumed with the new completion. In addition, using the multi finger caliper tool, it was detected that the thickness of the production tubing at the jetting area was significantly eroded, showing that the JP system has the possibility to risk the integrity for the outer string. The JP completion is a validated technology to apply for the slim-hole monobore completions to increase the recovery factor and minimize the implementation cost. In addition, the well integrity risk by the JP application to the slim-hole monobore completions was revealed, and new insights were gained, resulting in some pros and cons comparing the two types of the deployment pipes (CT & MT).
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Ridgway, Jeff, and Bryant Slater. "Use of Micro-Gravity Sensors for External Fluid Level Monitoring in Waste and Nuclear Related Applications." In 2020 International Conference on Nuclear Engineering collocated with the ASME 2020 Power Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/icone2020-16810.

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Abstract There are a number of applications in nuclear energy and hazardous waste disposal that require monitoring of fluids under extreme environments, including high levels of temperature, pressure, toxicity and radioactivity. Many of these applications will benefit from a monitoring technique that is external and non-invasive. Currently the sensors used are invasive, must reside inside the pressurized vessels and must penetrate the vessel walls, which can create a weakness in the vessel. Additionally, instruments that are used inside such containers must be exceptionally hardened to the environment. Information Systems Laboratories (ISL) has developed an external mass (gravimetric) measuring technique for monitoring nuclear coolant in Small Modular Reactors (SMRs), which will also work for measuring fluid levels in waste tanks, that avoids the problems inherent in invasive sensors. It utilizes a COTS gravitational sensor of unprecedented accuracy, leveraged via proper sensor placement geometry, to detect fluid changes of small amplitude from an outside position, obviating the need to penetrate the vessel. The technique is called Gravisense™. ISL has proven via simulation and experiment that this concept can be usefully applied to monitoring fluid levels in both nuclear reactors and large waste tanks. Numerical simulation algorithms were developed to calculate the gravity effect of small changes in water level, which were verified by experiments at the NIST Physical Simulator facility at the Oregon State University. The measured ultra-low noise levels of the superconducting gravimeter type which utilizes a Niobium sphere suspended in a magnetic field to attain its phenomenal accuracy, demonstrated that fluid levels in SMRs can be measured at least to within 3 cm. Furthermore, the method can distinguish between a contained leak (from reactor to containment vessel) from an external leak (from reactor to outside of containment). Additionally, simulations of waste canisters that hold spent fuel rods show that the fluid level measuring accuracy can potentially do better than 1 cm accuracy by measuring from below the vessel, and judicious placement of sensors on top of large waste tanks can potentially achieve a very impressive 2 mm measurement accuracy. These encouraging results prove that the Gravisense™ technique for fluid determination can be very useful in nuclear energy generation, testing, and research, as well as in waste monitoring situations that are difficult to monitor via traditional sensing technology. We believe that the next step should be to test the technique on canisters of the type that are currently storing waste in various DOE locations.
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9

Anil, Chippa, Aparna Satheesh, Babu Santhanagopalakrishnan, and Marcin Bielecki. "Bearing Housing Design for Vibration Control, Using Tilting Pad Bearings Instead of Lemon-Bore Type on a Gas Turbine." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-24330.

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Abstract Heavy duty gas turbines are usually equipped with hydrodynamic bearings which are either lemon-bore or tilting pad type. Baker Hughes legacy gas turbines use these two types of bearings, and its selection is based on 1) considering pros & cons from Rotor dynamics, 2) bearing performance, 3) bearing housing stiffness, 4) vibration detection & control. Non-contact probes are used to monitor the vibrations of rotor. Majority of legacy gas turbines are not equipped with these probes. Due to this fact, over the years it resulted in non-detection of dynamics & vibration issue, which caused frequent bearing replacement. As the increase in industry demand to apply and measure vibrations using non-contact probes on bearings, an effort was made by Baker Hughes to implement these on existing fleet units. Also, in order to increase rotor dynamics stability of low-pressure rotor, to improve bearing life and performance, effort was made to replace lemon-bore bearings with tilting pad. This paper demonstrates efforts made to design the titling pad which would fit within envelop of already available bearing housing. Bearing/shaft clearance, bearing performance, modification of bearing retainer clearances are the mandatory tasks which would be dealt in this study. The swap of bearing type, and its effect on whole gas turbine rotor dynamic stability, checking the frequency crossovers with Campbell diagram would also be dealt in this paper. This paper also focuses on assessment on oil passage routing, temperature & proximity probe instrumentation routing design. Re-design is performed by analyzing various configuration, assessing different sensitivity studies & validation of modified bearing housing from structural integrity, ultimate load capability, & split plane oil leakage retention and its comparison with baseline are most important aspects of finalization of this change, which will be showcased in this paper. Instrumentation routing was a critical task when the considering bearing replacement from lemon-bore to tilting pad. As lemon-bore type bearings just have an elliptical inner surface, it’s quite easy to install the thermocouples into a simple hole. But as replacement has tilting pads, the challenge is to instrument the pads without effecting their movement and functionality. Such best practices are also dealt in this paper. Comparison of tilting-pad with lemon-bore, considering the fixed shaft diameter, the retainer outer diameter of tilting pad is higher than lemon-bore. This effect has a change in bearing seat on bearing housing, thereby reducing the effective stiffness of the housing, and the reduced split plane surface. To tackle this situation, several sensitivities were executed, by re-modifying the bolts and bolt holes on the existing housing, without modifying the housing envelop.
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10

Kurzke, Joachim. "Effects of Inlet Flow Distortion on the Performance of Aircraft Gas Turbines." In ASME Turbo Expo 2006: Power for Land, Sea, and Air. ASMEDC, 2006. http://dx.doi.org/10.1115/gt2006-90419.

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The main problem with aircraft engine inlet flow distortion is its effect on the stability of the compression system. However, distortion does also influence the performance delivered by the propulsion system. There are two fundamentally different reasons for the change in performance: First there is the impact of the flow distortion on the component efficiencies and thus the thermodynamic cycle and second there are performance changes due to actions of the control system. This paper describes how the fundamental effects of inlet flow distortion on the performance of gas turbines can be evaluated with any engine performance program that employs an integrated parallel compressor model. This sort of simulation is a valuable tool for evaluating the basic effects of complex flow phenomena on the performance of a gas turbine. It delivers fundamentally correct answers since even the most complex flow structures obey the laws of mass and energy conservation and that’s all what the overall system simulation is about. In the parallel compressor model both pressure and temperature distortions are quantified with coefficients which relate the pressure (respectively temperature) in the spoiled sector to the value in the clean sector. In single compressor engines the static pressure at the exit of the clean sector equals that of the distorted sector. This hypothesis does not hold true with multi-compressor engines because the short inter-compressor ducts, which often contain struts or vanes, do not allow the mass flow transfer over the sector borders which would be required for balancing the static pressures. The degree of aerodynamic coupling of compressors in series can be described in the performance simulation program by a coupling factor. From the engine system simulation results it becomes clear why inlet flow distortion has only a minor impact on the thermodynamic cycle if the comparison of the two operating conditions (with clean and distorted inlet flow) is made at the properly averaged engine inlet conditions. For each compressor the parallel compressor theory yields two operating points in the map, one for the clean sector and one for the spoiled sector. The performance loss due to distortion is small since the efficiency values in the two sectors are only a bit lower than the efficiency at a comparable operating point with clean inlet flow. However, the control system of the engine can react to the inlet flow distortion in such a way that the thrust delivered changes significantly. This is particularly true if a compressor bleed valve or a variable area nozzle is opened to counteract compressor stability problems. Especially using re-circulating bleed air to increase the surge margin of a compressor affects the performance of the engine negatively. Two examples show clearly that the pro and cons of re-circulating bleed can only be judged with a full system simulation, looking at the surge line improvement alone can be misleading.
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Reports on the topic "Holy cows"

1

Attanasio, Orazio, and Britta Augsburg. Holy Cows or Cash Cows? Cambridge, MA: National Bureau of Economic Research, July 2014. http://dx.doi.org/10.3386/w20304.

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2

Attanasio, Orazio, and Britta Augsburg. Holy cows or cash cows? Institute for Fiscal Studies, July 2014. http://dx.doi.org/10.1920/wp.ifs.2014.1414.

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