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Academic literature on the topic 'Astra Ole'

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Published: 6 September 2023

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Journal articles on the topic "Astra Ole"

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&NA;. "From the ASTDA." Sexually Transmitted Diseases 38, no. 2 (February 2011): 69. http://dx.doi.org/10.1097/olq.0b013e3182085372.

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&NA;. "From the ASTDA." Sexually Transmitted Diseases 38, no. 12 (December 2011): 1088. http://dx.doi.org/10.1097/olq.0b013e31823a2356.

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&NA;. "From the ASTDA." Sexually Transmitted Diseases 39, no. 12 (October 2012): 912. http://dx.doi.org/10.1097/olq.0b013e31827b51f7.

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&NA;. "From the ASTDA." Sexually Transmitted Diseases 40, no. 12 (December 2013): 899–900. http://dx.doi.org/10.1097/olq.0000000000000059.

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Moncada, Jeanne. "From the ASTDA." Sexually Transmitted Diseases 41, no. 12 (December 2014): 700–701. http://dx.doi.org/10.1097/olq.0000000000000211.

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Miller, William C. "From the ASTDA." Sexually Transmitted Diseases 45, no. 8 (August 2018): 505. http://dx.doi.org/10.1097/olq.0000000000000879.

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&NA;. "From the ASTDA." Sexually Transmitted Diseases 35, no. 1 (January 2008): 1. http://dx.doi.org/10.1097/olq.0b013e318162cb6b.

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&NA;. "From the ASTDA." Sexually Transmitted Diseases 32, no. 12 (December 2005): 721. http://dx.doi.org/10.1097/01.olq.0000190016.00241.56.

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&NA;. "From the ASTDA." Sexually Transmitted Diseases 33, no. 6 (June 2006): 337. http://dx.doi.org/10.1097/01.olq.0000218973.99743.0b.

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&NA;. "From the ASTDA." Sexually Transmitted Diseases 33, no. 12 (December 2006): 697. http://dx.doi.org/10.1097/01.olq.0000251319.42742.7a.

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Dissertations / Theses on the topic "Astra Ole"

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Gallagher, Alexandra Margaret. "‘“Breathing for a while on our earth”: Re-reading S. T. Coleridge’s ‘Dejection: An Ode’ and ‘Letter To Asra’ in light of his severe rheumatic fever.’." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/20540.

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Hitherto overlooked medical sources ascribing Coleridge’s ill health to a deadly strain of rheumatic fever should prompt us not only to reinterpret ‘Dejection: An Ode’ as an empirical narrative of respiratory distress as much as a lament for lost or lessened imaginative power, but also to reconsider its long-standing classification as a ‘conversation poem’ and to reassess the relation of the ode to the letter from which it derives. Whereas discussion of air and breathing in Romantic literature tends to be metaphysical, this thesis addresses the question of what happens when we place the physiology and pathology of respiration at the centre of an analysis of a major Romantic poem. Analysing Coleridge’s response to his rheumatic fever as a case study of respiratory writing, I trace the ways in which the poet’s facility for literary osmosis transforms daily management and mismanagement of his bodily ailments into poetic legacy. Coleridge’s rheumatic fever inextricably knots together his body and imagination, such that breathlessness figures in his writing as both a conventional poetic trope and a frightening lived experience. Coleridge’s acute awareness of sensation and relationship with pain led him to understand breathing within material and ethereal spaces. His rheumatic reflections in letters and notebooks play a large part in shaping his literary identity, and respiratory dysfunction, especially the sense of smothering oppression, is crucial to an understanding, his own as much as ours, of his deeply dejected state. This thesis examines papers published by physicians close to Coleridge, such as William Cullen, David Dundas, and William Charles Wells; records pertaining to Coleridge’s autopsy; and an editorial from the London Times reflecting on his death, in order to identify rheumatic fever as Coleridge’s primary ailment, against countervailing diagnoses of opioid addiction, scrofula and lassitude. The scientific investigation of breathing was familiar to Coleridge from his youth, during which the study of pneumatic chemistry and pneumatic medicine flourished. He immersed himself in a world of ‘new airs’ including Joseph Priestley’s Experiments and Observations on Different Kinds of Air. Engagement with a pneumatic zeitgeist that deconstructed elemental air saw him act on medical advice from Thomas Beddoes’ Pneumatic Institute. With his close friend, Humphry Davy, he experimentally inhaled nitrous oxide and to Davy confided his rheumatic grief. Yet the alarm Coleridge felt about the spiritual consequences of such novel scientific enquiries must inform any exegesis of ‘Dejection: An Ode’ even as we must also look beyond his nostalgia for an older vitalist response to breath to affirm the centrality of the physical body in his ode’s deeper poetic truth. I find all the ode’s motifs invite respiratory comment, from the lost screaming child and trampled men to the suffocating nightmares and crushing vipers. (499 words)
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Khadilkar, Pramod. "Formulation of A Framework for Needs Analysis and Stakeholders' Behavioral Simulation for Design for the BOP." Thesis, 2017. http://etd.iisc.ac.in/handle/2005/4158.

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Poverty, and associated undesirability, distinguishes a population as Base of the (economic) Pyramid (BoP). Lack of necessities and vulnerability negatively affect the well-being of BoP populations. Literature reveals intervention’s failures in positively affecting the undesirability at BoP. Design intends to change current (undesirable) situation to desired situation. Failures of interventions refer to failure of design. Design for BoP targets BoP population as intended beneficiary and/or as intended stakeholders. Normative approach to understand the scope of design for BoP is a crucial contribution of this thesis. To formulate the scope of undesirability linked with BoP this thesis uses normative framework like Capability Approach by Amartya Sen. Normative frameworks evaluate prevalent conceptions of development and well-being, and related expected outcomes; which in turn affects the scope of enabling and goal oriented activities like design. This thesis uses the basis of prevalent design research and practice, while heavily drawing from interdisciplinary domains like developmental economics, social science and management. The initial broad objective of this thesis is to support designers in designing successful products for and/or at BoP. As stated earlier, the starting point was the normative understanding of poverty and development. The outcome wasstructured analysis of normative approaches to conceptualize measure and eradicate poverty. To translate these insights to design, these approaches were linked with phases (like conceptual design, embodiment design etc.), thinking modes (analysis, synthesis etc.) and dimensions (process, designer and task) of design. This, along with the review of prevalent design for BoP literature, resulted into product success determinants and formulation design scope sufficient for BoP.Evaluation of prevalent design approaches and supports like Human centered design, participatory design etc. revealed that, 1) prevalent design scope is product centric and insufficient for BoP, and 2) Current supports are insufficient in achieving the proposed design scope. Survey involving experienced designers from BoP domain validated both literature-based conclusions. Literature and survey also concluded that needs analysis and simulation of stakeholder’s behavioral responses are the two phases where design support is necessary, for which this thesis proposed a design framework. A case study of biomass cook stove tested and explained the framework. This case study also validated the relation between product success determinants and desired outcomes. Researcher designed a mould for rapid dissemination of cook stove and disseminated close to 250 cook stoves. Evaluation ofdissemination of cook stove, in three different contexts with three different modes of dissemination, using the proposed framework formed a crucial contribution of this dissertation. The framework’s applicability and usabilitywas testedusing design experiments involving experienced designers. The subjects endorsed that the framework provides them structured inputs about the type and amount of data to be collected, and processing of the data that leads to specifications. All subjects endorsed the applicability and usability of the framework for simulating the behavioral responses towards an intervention, which is largely missing in current design methods for BoP.
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Books on the topic "Astra Ole"

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Old Moore's 2017 Astral Diaries Pisces 2017 (Old Moore's Astral Diaries). W Foulsham & Co Ltd, 2016.

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Moore, Francis. Old Moores Horoscopeand Astral Diary: Libra (Old Moore's Horoscope & Astral Diary). Foulsham, 2005.

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SARASWATI, Brahmmanand. Obe: Easy Astral Projection. Independently Published, 2018.

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Moore, Francis. Old Moore's Horoscope and Astral Diary: Aquarius (Old Moore's Horoscope & Astral Diary). Foulsham, 2007.

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Books, Foulsham. Old Moore's Horoscope and Astral Diary: Sagittarius (Old Moore's Horoscope & Astral Diary). Foulsham & Co Ltd, 1996.

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Books, Foulsham. Old Moore's Horoscope and Astral Diary: Cancer (Old Moore's Horoscope & Astral Diary). Foulsham & Co Ltd, 1996.

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Books, Foulsham. Old Moore's Horoscope and Astral Diary: Capricorn (Old Moore's Horoscope & Astral Diary). Foulsham & Co Ltd, 1996.

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Books, Foulsham. Old Moore's Horoscope and Astral Diary: Pisces (Old Moore's Horoscope & Astral Diary). Foulsham & Co Ltd, 1996.

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Books, Foulsham. Old Moore's Horoscope and Astral Diary: Libra (Old Moore's Horoscope & Astral Diary). Foulsham & Co Ltd, 1996.

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Old Moore's Horoscope and Astral Diary: Aquarius (Old Moore's Horoscope & Astral Diary). Foulsham & Co Ltd, 1996.

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Book chapters on the topic "Astra Ole"

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Seddig, Katrin, Patrick Jochem, and Wolf Fichtner. "Electric Vehicle Market Diffusion in Main Non–European Markets." In The Future European Energy System, 75–88. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-60914-6_5.

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AbstractElectric vehicles (i.e., battery and plug-in hybrid electric vehicles) are seen as one promising technology toward a sustainable transport system as they have the potential to reduce CO2 emissions. The forecast of their market penetration depends on various factors including the cost development of key components such as the electric battery. This chapter focuses on the impact of experience curves on the battery costs, and consequently on the electric vehicles’ market penetration, which is simulated by coupling two system dynamics transport models: ASTRA, representing Europe, and TE3, representing key non-European car markets. The results of the TE3 model show that the consideration of global endogenous learning curves has an impact on the battery costs and therefore, the development of the electric vehicle stock (“feedback loop”).
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El-Ali, Leena. "Eve Is Not Blamed for the Fall from Eden, Nor Are Women Guilty by Association." In Sustainable Development Goals Series, 63–68. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-83582-8_6.

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AbstractThe Qur’an blames Adam and Eve equally for the Fall from the Garden, on one occasion reproaching Adam specifically, no doubt as the symbol of the human race, which is often referred to as the Children of Adam. Eve is never singled out for particular blame nor depicted as the temptress who lured Adam to sin. In the Qur’anic account, rather, Satan whispers to both Adam and Eve and leads both astray, and both are equally accountable.
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Dolbear, Sam. "Lines that Reduce." In The Case for Reduction, 117–33. Berlin: ICI Berlin Press, 2022. http://dx.doi.org/10.37050/ci-25_06.

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Through various cases and instances, this essay opens with the question of biography and the demands of its form: that is, biography’s attempt to reduce historical totalities to the page in moments of sudden condensation. It then introduces the figure of Charlotte Wolff (1897–1986), a doctor and later hand reader and sexologist, who appears on a diagram, constructed by Walter Benjamin in 1932, to map his life through his ‘Urbekanntschaften’ (primal acquaintances). It then seeks to transpose Benjamin’s diagram into other linear forms, such as a family tree, a diagram of chemical affinity, and an astral chart, to add one: the diagram as a map of the hand. This opens up a number of temporal, historical, and epistemic reductions, or cases of reduction, in Wolff’s work and beyond. It concludes with a particular moment in Wolff’s biography — her arrest in 1933 and her escape to Paris — as a final instance of the line, as border.
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Ledwidge, Frank. "9. Per ardua ad astra?" In Aerial Warfare: A Very Short Introduction, 124–28. Oxford University Press, 2020. http://dx.doi.org/10.1093/actrade/9780198804314.003.0009.

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We are only at the beginning of the age of the drone and many possibilities are mooted for their future. The idea of unmanned fighters making air combat and manoeuvring decisions in microseconds may only be a couple of decades away. Will fighter pilots exist then? Will aircrew in combat aircraft become a thing of the past? ‘Per ardua ad astra?’ explains how, today, major air forces such as the RAF and US air force consider themselves aerospace forces, operating in space, cyberspace, and airspace. Whether the structures of air forces remain similar, or change radically, one thing is certain—aircraft of one kind or another will continue to be vital components of any military operation.
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Kotyk, Jeffrey. "Astrology and Astral Magic in Tantric Japan." In The Oxford Handbook of Tantric Studies. Oxford University Press, 2022. http://dx.doi.org/10.1093/oxfordhb/9780197549889.013.11.

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Abstract Japanese Buddhism received and implemented a kind of Sinicized form of astrology from the ninth to tenth centuries. This type of astrology differed from the type of court omenology that had earlier been received from the mainland and was based on ancient Chinese concepts of astroterrestrial correspondences and related chiefly to concerns of the country as a whole, rather than to individuals. The new form of astrology, originating from Indian and Indo-Iranian sources in Chinese translation, could be used for timing rituals to maximize their efficiency or to predict the fate of an individual. The planets, now viewed as deities, also entered the Buddhist pantheon in Japan and became an important object of worship. New ritual forms were also received and developed, in which one could negotiate one’s fate as it might be predicted based on astrology.
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Starkey, Lawrence H. "Particle and Astro-physics Challenge Kant’s Phenomenolism." In The Paideia Archive: Twentieth World Congress of Philosophy, 323–33. Philosophy Documentation Center, 1998. http://dx.doi.org/10.5840/wcp20-paideia199837686.

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For two centuries Kant's first Critique has nourished various turns against transcendent metaphysics and realism. Kant was scandalized by reason's impotence in confronting infinity (or finitude) as seen in the divisibility of particles and in spatial extension and time. Therefore, he had to regard the latter as subjective and reality as imponderable. In what follows, I review various efforts to rationalize Kant's antinomies-efforts that could only flounder before the rise of Einstein's general relativity and Hawking's blackhole cosmology. Both have undercut the entire Kantian tradition by spawning highly probable theories for suppressing infinities and actually resolving these perplexities on a purely physical basis by positing curvatures of space and even of time that make them reëntrant to themselves. Heavily documented from primary sources in physics, this paper displays time’s curvature as its slowing down near very massive bodies and even freezing in a black hole from which it can reëmerge on the far side, where a new universe can open up. I argue that space curves into a double Möbius strip until it loses one dimension in exchange for another in the twin universe. It shows how 10-dimensional GUTs and the triple Universe, time/charge/parity conservation, and strange and bottom particle families and antiparticle universes, all fit together.
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Langhamer, Claire. "‘Astray in a Dark Forest’? The Emotional Politics of Reconstruction Britain." In Total War, 137–56. British Academy, 2020. http://dx.doi.org/10.5871/bacad/9780197266663.003.0008.

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Based on material generated by the British social investigative organisation Mass Observation between 1944 and 1946 this chapter maps some of the political work that emotion did in the immediate aftermath of the Second World War. It adapts cultural theorist Sara Ahmed’s question ‘What do emotions do?’ to a precise historical moment. It approaches emotion through the lens of social, as well as cultural, history by asking an additional question: ‘What did people do with emotion?’ It examines how the interlinked categories of feeling and experience were invoked by individual Mass Observers as ways of knowing a rapidly changing world and as grounds for participating in a dynamic public sphere. The chapter argues that a distinctive form of ‘emotional citizenship’ emerged out of the war; one which deployed feeling as a form of epistemology and experience as an evidential base.
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Jorgensen, Larry M. "Perception, Consciousness, and Continuity." In Leibniz's Naturalized Philosophy of Mind, 145–71. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198714583.003.0007.

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This chapter looks at a vexed issue in Leibnizian interpretation––the question of Leibniz’s theory of consciousness. The phenomena of consciousness are apparently discontinuous, and, Leibniz argues, the failure to resolve these apparent discontinuities may lead one astray. I will show that the principle of continuity provides reasons to doubt that some of the main interpretations of Leibniz’s theory of consciousness are correct, and I will propose an interpretation that adheres more closely to this principle. Against those who argue that Leibniz’s theory of consciousness is a higher-order theory, this chapter argues that the standard presentation of such an interpretation violates the principle of continuity. An alternative threshold theory is presented and defended.
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Angle, Stephen C. "Listen to the Right Music." In Growing Moral, 70–81. Oxford University Press, 2022. http://dx.doi.org/10.1093/oso/9780190062897.003.0007.

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This chapter examines how it is that music affects us, especially in its ability to unite and sustain community. Because of its power, music is an important part of cultivating a good Confucian life, but also a potential danger that can lead one astray. The chapter argues that Confucians both can and should embrace certain kinds of changes to our music. For music to unite and shape us in healthy ways, it must draw upon the cultures of the diverse members of contemporary communities, while at the same time expressing values at the heart of Confucianism. For a modern American, this means that Jimi Hendrix’s rendition of the “Star-Spangled Banner” is exemplary Confucian music-making.
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Crivelli, Paolo. "Division and Classification." In Plato's Philebus, 34–54. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198803386.003.0003.

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The Philebus presents some arguments for the paradoxical claim that the many are one and the one many. The most serious of these arguments concerns the multiple spatial locations of an attribute. For instance, since the attribute man belongs to many men, it is in them, and it is therefore both one and many (for it is in them either by having different parts of itself contained in them or by being wholly contained in each of them). Plato maintains that this argument goes astray. He appeals to division and collection, the procedures linked with definition and classification. He probably has in mind a mereological model of particulars, whereby perceptible particulars are mixtures whose ingredients are the attributes which they partake of. Among the ingredients of a perceptible particular there are properties that specify its spatial location, so the problem of the multiple spatial location of an attribute evaporates.
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Conference papers on the topic "Astra Ole"

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Clauss, Gu¨nther F., Hans W. Gerber, and Carsten Hippe. "ASTRA: An Automatic Spading Tool for the Remote Application at Abyssal Depths." In ASME 2003 22nd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2003. http://dx.doi.org/10.1115/omae2003-37171.

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The future approach of the European marine research programme focuses on the establishment of multi-disciplinary networks including existing systems, and the development of new technologies for efficient installation and near real time communication. Within this framework the European Community funds the networks ORION (Ocean Research by Integrated Observation Networks - GEOSTAR 3) and ESONET 2 (European Seafloor Observatory NETwork) with several European partner institutions involved in marine research. Key technologies for deep-sea research have been developed in the frame of the GEOSTAR project (GEophysical and Oceanographic STation for Abyssal Research - Deep-Sea Mission). The concept comprises: • the deep-sea benthic observatory for geophysical and oceanographic purposes with its unique Data Acquisition and Control System (DACS), • the innovative underwater communication system as near real time interface, and • the deployment and recovery vehicle MODUS (MObile Docker for Underwater Sciences) for precise operations with heavy payloads. The know-how and existing equipment establishes a good basis for extensions and further developments to be used for network projects. ASTRA — an Automated Spading Tool for Remote Applications at abyssal depths — is one of these new concepts. This tool — integrated into the GEOSTAR-Bottom Station (BS) (also called node) and deployed by MODUS — will bury an Ocean Bottom Seismometer (OBS) into the sub-sea soil. The OBS will be laterally displaced to the node and connected by an umbilical. At the end of a long-term mission the node will be recovered by MODUS and the OBS is pulled out of the ground hanging underneath the node. Both components, node and OBS, will be recovered by the surface research vessel. Equipment and procedures developed within the GEOSTAR project have been focused on providing a long-term stationing on the ocean floor to perform scientific measurements. The ASTRA concept takes a next step and aims for the interaction with its environment. Based on the proven and reliable combination of the deep sea shuttle MODUS for heavy load transportation and the payload Bottom Station as the carrier of equipment the new module ASTRA will extend the spectrum of scientific operating possibilities in the deep sea adding engineering services. An iterative process with an integrated design application of a 3D-CAD-system, FEM structural analysis and Multibody Simulation (MBS) characterizes the development phase of ASTRA. Using virtual mock-up critical aspects of handling and operation can be identified, and in consequence more easily avoided. Simulation results are validated by experimental investigations. Operations with the ASTRA prototype and the complete network-system will be performed in the Tyrrhenian Sea in late summer 2003.
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PRAKASH, M., S. RATKOVIĆ, and S. I. DUTTA. "NEUTRINO PROCESSES IN SUPERNOVAE AND NEUTRON STARS IN THEIR INFANCY AND OLD AGE." In Proceedings of the KIAS–APCTP International Symposium on Astro-Hadron Physics. WORLD SCIENTIFIC, 2004. http://dx.doi.org/10.1142/9789812702524_0038.

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Lasmane, Skaidrīte. "The Ambiguity of Public Cynicism in Democracy." In International scientific conference of the University of Latvia. University of Latvia Press, 2023. http://dx.doi.org/10.22364/ms22.08.

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In terms of the media, there are various means of influencing the audience by informing and conditioning its attitude or forming its mood. Amongst these means, attention should be paid to scepticism and cynicism, leading to destructive, critical attitude, doubt or denial. Cynicism is the questioning or denial of what is generally accepted or accepted by the majority and some particular group. The text emphasizes the dual possible moral evaluation of cynicism: on the one hand, the justifiability and usefulness of cynicism in one situation, on the other hand, its destructive and misleading effect in another, weakening support for social and moral order. The representation of the unveiling of the monument of Gunārs Astra in the media on 20 January 2022 is analysed here as a case of misleading strategic communication.
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Hohberg, Jörg-Martin. "Rehabilitation of Earth Retaining Wall for Slope Failure, due to Strength Reduction and Seismic Acceleration, Considering Nonlinear Soil-Structure Interaction." In IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2022. http://dx.doi.org/10.2749/prague.2022.0766.

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<p>The usual design of retaining walls employs triangular earth pressure distributions with coefficients anticipating some compliance in sliding or tilting mode; if very stiff, pressure-at-rest is assumed. If seismic acceleration is to be accounted for, this is mostly done by the formula of Mononobe-Okabe, which is over 100 years old. Recent collapses of angular retaining walls, such as the one of Schönberg at the Brenner Motorway in March 2012, drew particular attention to their vulnerability due to unnoticed corrosion of the bending reinforcement in the cold joint between wall and base slab or a tail skid. Extensive risk analyses by both the Austrian ASFINAG and the Swiss ASTRA were triggered [1][2] as well as research projects at TU Graz and ETHZ Zurich. The following presentation inves- tigates the failure modes of a staggered retaining wall in a steep slope, the stabilizing effects of prestressed ground anchors, and the influence of soil-structure interaction on stress redistribution in the reinforced concrete structure.</p>
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DUMINS, Karlis, Toms STALS, and Dagnija LAZDINA. "FOREST REGENERATION QUALITY ASSESSMENT BY ASTA SYSTEM." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.178.

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In Latvia one third of the total forest area is regenerated by planting tree seedlings and therefore it is important to choose the appropriate soil preparation method and the right type of regeneration material for each forest type. Usually the success of afforestation is evaluated by how high is the average seedling survival rate and growth parameters like height, annual increment, diameter at breast height while the location of the seedling is disregarded. This may be of great importance since in such stands the environmental conditions typically are not entirely homogenous. Micro topography differences impact seedling growth, because it modifies water regime, temperature, micronutrient availability, sun radiation and other factors. Therefore, aim of this work is to improve monitoring methods and determine the most efficient soil preparation and seedling preparation combination to improve the quality of forest regeneration. That could be done using ASTA documentation system originally developed to show seedling and mound location and density in planting area during mechanic planting. But it also allows to link the precise location of the seedling and growing conditions with its growing rate and survival and therefore it is easier to exclude seedlings that are affected by other factors than those that you are interested in, so you can gain more representative results. This also could be used in forest management. When using ASTA system it is also possible to display how different tree disease are distributed in the stand, if they have spread eventually or localized only in some parts of the stand, also it can be used for browsing and other tree damage monitoring in the stand. In conclusion: in harsh environmental conditions on unprepared forest soil and soil prepared in furrows made by disc trench larger seedlings show better survival rate. Survival of seedlings is significantly impacted by micro topography, whereas mounded micro sites equalize local environmental conditions that reduce impact of micro topography.
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Seher-Weiß, Susanne, Vincent Myrand-Lapierre, Arthur Gubbels, Steffen Greiser, Johannes Wartmann, Joseph Ricciardi, and Kenneth Hui. "Bell 412 System Identification: Comparing Methods and Tools." In Vertical Flight Society 75th Annual Forum & Technology Display. The Vertical Flight Society, 2019. http://dx.doi.org/10.4050/f-0075-2019-14636.

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Over the last decades system identification has become a standard method for developing rotorcraft models from flight test data. Using data from the Bell 412 Advanced Systems Research Aircraft (ASRA) helicopter operated by the National Research Council of Canada, different identification methods and tools are applied to a common database. The identified 6-DoF rigid-body models at one flight condition are compared in detail regarding eigenvalues and the match in both time and frequency domain. The development of a global model from point models that were identified at the different flight conditions is described. Finally, several possible extensions of the rigid-body models are investigated assessing corresponding improvement in model fidelity.
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Donner, Paul. "Clustering experiments with the Astro benchmarking data set with semantic document embeddings – off-the-shelf vs. custom embeddings created from citations, text, and both." In 27th International Conference on Science, Technology and Innovation Indicators (STI 2023). International Conference on Science, Technology and Innovation Indicators, 2023. http://dx.doi.org/10.55835/643fed628e529cfebf33f797.

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What accounts for the observed better quality of publication-level topical science clustering solutions which use only citation relations as input data, compared to those using sophisticated semantic similarity data derived from both citations and textual terms? A survey of empirical work relevant to the concept of unconscientious referencing practices indicates that purely citation-based methods should be affected by significant ‘citation noise’, unlike text-based methods. This study continues work with the Astro benchmarking data set for bibliometric clustering by applying semantic representation learning techniques to scientific documents in order to isolate the clustering performance difference between direct citations and textual terms. We investigate variants of Random Indexing embeddings learned on this data set and one pre-trained off-the-shelf semantic document embedding, SPECTER. The evaluation is performed with four previously introduced validation data sets but using a newly suggested clustering evaluation measure.
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Tidball, Marcos, and Cristina Furlanetto. "Similarity Search of Low Surface Brightness Galaxies in Large Astronomical Catalogs." In LatinX in AI at Neural Information Processing Systems Conference 2022. Journal of LatinX in AI Research, 2022. http://dx.doi.org/10.52591/lxai202211282.

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Low Surface Brightness Galaxies (LSBGs) constitute an important segment of the galaxy population, however, due to their diffuse nature, their search is challenging. The detection of LSBGs is usually done with a combination of parametric methods and visual inspection, which becomes unfeasible for future astronomical surveys that will collect petabytes of data. Thus, in this work we explore the usage of Locality-Sensitive Hashing for the approximate similarity search of LSBGs in large astronomical catalogs. We use 11670190 objects from the Dark Energy Survey Y3 Gold coadd catalog to create an approximate k nearest neighbors model based on the properties of the objects, developing a tool able to find new LSBG candidates while using only one known LSBG. From just one labeled examplewe are able to find various known LSBGs and many objects visually similar to LSBGs but not yet catalogued. Also, due to the generality of similarity search models, we are able to search for and recover other rare astronomical objects without the need of retraining or generating a large sample. Our code is available on https://github.com/zysymu/lsh-astro.
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Bernard, Shai, Jun Wang, and Mark Fuge. "Mean Squared Error May Lead You Astray When Optimizing Your Inverse Design Methods." In ASME 2022 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/detc2022-90065.

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Abstract When performing time-intensive optimization tasks, such as those in Topology Optimization or Shape Optimization, researchers have turned to Machine Learned (ML) Inverse Design methods — i.e., algorithms that predict the optimized geometry from input conditions — to either replace or warm start traditional optimizers. Almost exclusively, such methods are trained and optimized to reduce the Mean Squared Error between a method’s output and a ground truth training dataset of optimized designs, this being the obvious choice for traditional supervised learning. While convenient, we show that this choice may be myopic. Specifically, we compare two methods of optimizing the hyper-parameters of both a random forest (RF) and k-nearest neighbors (KNN) model for predicting the optimal topology in a 2D heat sink example. We show that under both direct Inverse Design as well as when warm starting further Topology Optimization (TO), using typical Mean Squared Error metrics produces less performant models than a proposed metric that directly evaluates the objective function, though both methods produce designs that are almost one order of magnitude better than a control condition that uses a uniform initialization common in TO. We also illustrate how warm starting TO with predicted solutions impacts both the convergence time, the type of solutions obtained during optimization, and the final designs. Sensitivity analyses on various model parameters demonstrate that the results are not dependent on other model hyperparameters. Overall, our initial results portend that researchers may need to revisit common choices for evaluating ID methods that subtly trade-off factors in how an ID method will actually be used. We hope our open-source dataset and evaluation environment will spur additional research in those directions.
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Ogbodu, Stella, Bart Tichelaar, Chibueze Amadi, Chinedu Anijekwu, Kenneth Eke, Jumah Alli-Oluwafuyi, and Peter Schutjens. "Drilling Through Shales Below Depleted Sands: Case Study of a Niger Delta HPHT Gas Development Well." In SPE Nigeria Annual International Conference and Exhibition. SPE, 2023. http://dx.doi.org/10.2118/217195-ms.

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Abstract To sustain gas supply to NLNG T1-T7, it has become imperative to access deeper, geologically complex HPHT reservoirs in the Niger Delta. These hydrocarbon targets typically lie beneath hydrostatic geological intervals and are overlain by depleted and/or producing reservoirs hence choosing the right casing depth is a key parameter in executing HPHT wells In the wells in Astra East Field, it was decided to set a casing shoe in a homogeneous shale of ~200ft vertical thickness, located between overlying heavily depleted sand and underlying over pressured sand. This poses an interesting question of the direct practical importance: at what depth should the casing shoe be set to minimize the risk of kicks and/or wellbore instability (because of too low mud weight) and losses (because of too high mud weight). To help answer this question, wireline log data and drilling observations in other wells in the same field, where such shales were found, were analyzed, and evaluated. The electrical resistivity in the shales consistently showed the following signature from top to bottom across the shale: Zone 1: Relatively high electric resistivity just below the depleted sand, near constant with depth. Zone 2: The signature gradually decreasing with increasing depth, and finally, at the lower section of the shale. Zone 3: Relatively low electric resistivity just above the over pressured sand, the signal again near-constant with depth. The drilling observations revealed that wells with the casing set in Zone 1 experienced severe mud losses and differential sticking, while wells where the casing set in zones 2 or Zone 3 did not. This observation could be explained as follows - The electric resistivity signature as a function of depth (in the three zones described above) may reflect the pore pressure in the bounding sands: at the top, the shale "feels" the sand depletion, transmitted over the years via pore fluid pressure diffusion, which compacts the shale, presses the grains contacts closer together, thus increasing electrical resistivity. In contrast, at the base, the shale "feels" the overpressure in the sand below, maintained over the millions of years of geologic diagenesis. This keeps the deeper part of the shale at relatively low effective stress (compared to the upper part), with relatively low grain contact pressure, thus reducing electrical resistivity. We postulate that there may be a mechanism-based explanation for the heavy losses and sticking when the casing is set in Zone 1. We also inferred from the drilling data that the tendency to set the casing shoe quite shallow (in Zone 1) in previous wells and in the well in case study was driven by concern of wellbore instability and severe losses experienced while drilling through the intra-reservoir shale. Closer inspection reveals that this concern is probably not justified, as the apparently high risk of wellbore instability at the top of the shale was caused by using a too-high pore fluid pressure (i.e., one unaffected by the depletion of the sand on top of it). For future planned wells in the field, new LWD data acquisition practices have been developed for early detection of the onset of overpressures (top of Zone 2). This will improve the accuracy of casing point selection and the chances of successfully drilling across these intervals without well control issues.
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