Bibliografie tematiche / Confined extensions

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Letteratura scientifica selezionata sul tema "Confined extensions"

Autore: Grafiati
Pubblicato: 14 dicembre 2024

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Articoli di riviste sul tema "Confined extensions"

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Loaiciga, Hugo A., and Miguel A. Mariño. "The inverse problem for confined aquifer flow: Identification and estimation with extensions." Water Resources Research 23, no. 1 (1987): 92–104. http://dx.doi.org/10.1029/wr023i001p00092.

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De Sarkar, Tanmay. "The prevalence of web browser extensions use in library services: an exploratory study." Electronic Library 33, no. 3 (2015): 334–54. http://dx.doi.org/10.1108/el-04-2013-0063.

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Purpose – The paper aims to present an outline how libraries are harnessing browser extensions to provide an easy and convenient access to library resources and services. Investigating the features, purposes of use and types of browser extensions prevalent among libraries in different regions, the paper seeks to measure the degree of implementation of browser extensions. Design/methodology/approach – Stratified sampling method was followed to select academic libraries, and convenient sampling method was applied to select public libraries from four continents – Asia, Oceania, Europe and North A
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Otto, K. N., and E. K. Antonsson. "Extensions to the Taguchi Method of Product Design." Journal of Mechanical Design 115, no. 1 (1993): 5–13. http://dx.doi.org/10.1115/1.2919325.

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The Taguchi method of product design is an experimental approximation to minimizing the expected value of target variance for certain classes of problems. Taguchi’s method is extended to designs which involve variables each of which has a range of values all of which must be satisfied (necessity), and designs which involve variables each of which has a range of values any of which might be used (possibility). Tuning parameters, as a part of the design process, are also demonstrated within Taguchi’s method. The method is also extended to solve design problems with constraints, invoking the meth
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Morapedi, Setumile. "Passive constructions in Setswana." JULACE: Journal of the University of Namibia Language Centre 3, no. 1 (2018): 38–52. http://dx.doi.org/10.32642/julace.v3i1.1374.

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The paper analyses passive constructions in Setswana from morpho-syntactic view point, showing that the suffixation of a passive morpheme to the verb reduces the argument structure of the verb. Previous studies carried out in Setswana verbal suffixes have confined their investigations to these morphemes as elements of morphology but have failed to observe that these affixes overlap into syntax. Chebanne (1996) observes that in Setswana, verbal extensions can combine with a single verbal base but fail to observe the overlap into syntax. Further, the studies do not give any insight in the featur
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Mazharimousavi, S. Habib, Z. Amirabi, and M. Halilsoy. "Thin-shell wormholes in (2 + 1)-dimensional Einstein-scalar theory." Modern Physics Letters A 32, no. 10 (2017): 1750064. http://dx.doi.org/10.1142/s021773231750064x.

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We present an infinite class of one-parameter scalar field extensions to the Bañados, Teitelboim and Zanelli (BTZ) black hole in 2 + 1 dimensions. By virtue of the scalar charge, the thin-shell wormhole supported by a linear fluid at the throat becomes stable against linear perturbations. More interestingly, we provide an example of thin-shell wormhole which is strictly stable in the sense that it is confined in between two classically intransmissible potential barriers.
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DU, ZHUO, XIN-LEI FAN, QIN YANG, and CHENG-MING TIAN. "Host and geographic range extensions of Melanconiella, with a new species M. cornuta in China." Phytotaxa 327, no. 3 (2017): 252. http://dx.doi.org/10.11646/phytotaxa.327.3.4.

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Members of Melanconiella are opportunistic pathogens and endophytic fungi, and have been found to confined so far, on the collection of host family Betulaceae. Moreover, two fresh specimens associated with canker and dieback of Cornus controversa and Juglans regia collected in Shaanxi, China were found as distinct and new species of Melanconiella, based on morphological and multi-gene, combined, phylogenetic analyses (ITS, LSU, rpb2 and tef1-α). Results also revealed the host and geographic range extensions of this genus. Melanconiella cornuta sp. nov. is introduced with an illustrated account
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Cretu, Nicolae, Mihail-Ioan Pop, and Hank Steve Andia Prado. "Some Theoretical and Experimental Extensions Based on the Properties of the Intrinsic Transfer Matrix." Materials 15, no. 2 (2022): 519. http://dx.doi.org/10.3390/ma15020519.

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The work approaches new theoretical and experimental studies in the elastic characterization of materials, based on the properties of the intrinsic transfer matrix. The term ‘intrinsic transfer matrix’ was firstly introduced by us in order to characterize the system in standing wave case, when the stationary wave is confined inside the sample. An important property of the intrinsic transfer matrix is that at resonance, and in absence of attenuation, the eigenvalues are real. This property underlies a numerical method which permits to find the phase velocity for the longitudinal wave in a sampl
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Streiffer, S. K., and D. D. Fong. "Phase Transitions in Nanoscale Ferroelectric Structures." MRS Bulletin 34, no. 11 (2009): 832–37. http://dx.doi.org/10.1557/mrs2009.233.

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AbstractOver decades of effort, investigations of the intrinsic phase transition behavior of nanoscale ferroelectric structures have been greatly complicated by materials processing variations and by the common and uncontrolled occurrence of spacecharge, which interacts directly with the polarization and can obscure fundamental behavior. These challenges have largely been overcome, and great progress in understanding the details of this class of phase transitions has been made, largely based on advances in the growth of high-quality, epitaxial ferroelectric films and in the theory and simulati
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Schulte, Reinhard W., and Tianfang Li. "Innovative Strategies for Image-Guided Proton Treatment of Prostate Cancer." Technology in Cancer Research & Treatment 5, no. 2 (2006): 91–100. http://dx.doi.org/10.1177/153303460600500203.

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Proton beam therapy has a proven track record of treating non-metastatic prostate cancer with excellent disease-free survival results when using homogeneous doses between 75 and 82 CGE (Cobalt Gray Equivalent) to the prostate target volume. In clinically organ-confined prostate cancer, it may be possible, in principle, to further improve outcomes by reducing the margins of the high-dose planning target volume to the gross tumor volume and by covering the clinical target volume with a dose sufficient to control microscopic extensions of the tumor. This would allow further dose escalation withou
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Donaire, Manuel, José María Muñoz-Castañeda, Luis Miguel Nieto, and Marcos Tello-Fraile. "Field Fluctuations and Casimir Energy of 1D-Fermions." Symmetry 11, no. 5 (2019): 643. http://dx.doi.org/10.3390/sym11050643.

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We investigate the self-adjoint extensions of the Dirac operator of a massive one-dimensional field of mass m confined in a finite filament of length L. We compute the spectrum of vacuum fluctuations of the Dirac field under the most general dispersionless boundary conditions. We identify its edge states in the mass gap within a set of values of the boundary parameters, and compute the Casimir energy of the discrete normal modes. Two limit cases are considered, namely, that of light fermions with m L ≪ 1 , and that of heavy fermions for which m L ≫ 1 . It is found that both positive and negati
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Tesi sul tema "Confined extensions"

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Benzoni, Séverin. "Classification des filtrations dynamiques et étude des systèmes d'entropie positive." Electronic Thesis or Diss., Normandie, 2024. https://theses.hal.science/tel-04835404.

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Abstract (sommario):
Dans cette thèse, nous explorons les structures possibles des systèmes dynamiques de la forme $\bfX :=(X, \A, \mu, T)$ et leurs tribus facteur $\B \subset \A$. Les deux premiers chapitres étudient les différentes façons dont une tribu facteur $\B$ peut s'inclure dans un système dynamique $\bfX :=(X, \A, \mu, T)$, c'est-à-dire que nous étudions certaines structures possibles de l'\emph{extension} $\A \arr \B$. Dans le premier chapitre, nous considérons les concepts de \emph{super-innovations} et de \emph{standardité} des extensions, inspirés de la théorie des filtrations. Un point important est
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Wang, Aijuan. "Experimental and numerical investigation of the confinement effect on the impinging flame in a compartment." Electronic Thesis or Diss., Bourges, INSA Centre Val de Loire, 2021. http://www.theses.fr/2021ISAB0002.

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Le phénomène de flamme de diffusion impactant une paroi est fréquent dans les scénarios d’incendie en milieu clos. Celui-ci peut entraîner à avoir des conséquences désastreuses en termes de vie humaine et de biens matériels. En effet, lorsqu'une flamme incidente se produit dans un compartiment, elle peut augmenter le risque de propagation du feu de celui-ci vers une autre pièce à travers une explosion de fumée représentant une menace pour les personnes pié-gées. Afin d’apporter des éléments de compréhension sur le comportement de ce type de flamme, de nombreuses études ont réalisé. Celles-ci s
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Libri sul tema "Confined extensions"

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Victor, Elias, Turner-Fairbank Highway Research Center, and Earth Engineering & Sciences, Inc., eds. Development of protocols for confined extension/creep testing of geosynthetics for highway applications. U.S. Dept. of Transportation, Federal Highway Administration, Research and Development, Turner-Fairbank Highway Research Center, 1998.

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Development of protocols for confined extension/creep testing of geosynthetics for highway applications: Publication no. FHWA-RD-97-143. U.S. Dept. of Transportation, Federal Highway Administration, Research and Development, Turner-Fairbank Highway Research Center, 1998.

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Keshav, Satish, and Alexandra Kent. Inflammatory bowel disease. Edited by Patrick Davey and David Sprigings. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780199568741.003.0203.

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Abstract (sommario):
Inflammatory bowel disease (IBD) encompasses ulcerative colitis (UC) and Crohn’s disease (CD). Both conditions cause chronic relapsing inflammation in the gastrointestinal (GI) tract, but have different characteristics. UC causes diffuse mucosal inflammation limited to the colon, extending proximally from the anal verge, with the rectum involved in 95% of patients. UC is described in terms of the disease extent: proctitis (confined to the rectum), proctosigmoiditis (disease confined to the recto-sigmoid colon), distal disease (distal to the splenic flexure), and pan-colitis (the entire large i
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Field, Clive D. Counting Religion in Britain, 1970-2020. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780192849328.001.0001.

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Counting Religion in Britain, 1970–2020, the fourth volume in the author’s chronological history of British secularization, sheds significant new light on the nature, scale, and timing of religious change in Britain during the past half-century, with particular reference to quantitative sources. Adopting a key performance indicators approach, twenty-one facets of personal religious belonging, behaving, and believing are examined, offering a much wider range of lenses through which the health of religion can be viewed and appraised than most contemporary scholarship (which is typically confined
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Capitoli di libri sul tema "Confined extensions"

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Mónica, Julio C., Patricia Melin, and Daniela Sánchez. "Genetic Optimization of Ensemble Neural Network Architectures for Prediction of COVID-19 Confirmed and Death Cases." In Fuzzy Logic Hybrid Extensions of Neural and Optimization Algorithms: Theory and Applications. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-68776-2_5.

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Fontaine, G., S. Poncet, and E. Serre. "Multidomain Extension of a Pseudospectral Algorithm for the Direct Simulation of Wall-Confined Rotating Flows." In Lecture Notes in Computational Science and Engineering. Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-01601-6_21.

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Marques, José Carlos, and Pedro Góis. "Diaspora Policies, Consular Services and Social Protection for Portuguese Citizens Abroad." In IMISCOE Research Series. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51245-3_23.

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Abstract Portugal is a traditional country of emigration with a multigenerational diaspora spread across a large number of countries. In the last 50 years, especially after the 1974 revolution, it developed a welfare state that responds to the needs of residents (including immigrants). Traditionally, this welfare state has been described as fragile in comparison with other welfare regimes in Europe. Nevertheless, it was built as a universal welfare system based on jus solis and deterritorialized jus sanguinis regime. The study of the extension of social protection to Portuguese citizens living abroad had not yet received sufficient attention, albeit recurrent news on measures and strategies that the state put in practice to assist Portuguese emigrants in need. This chapter will survey some of the recent policies to reach citizens abroad by showing the limits of the Portuguese welfare state in action. Through these policies and actions, Portugal projects an image of an always-present state that extents its national powers beyond the limits of its territorially confined borders.
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Waga, Masaki. "Active Learning of Deterministic Timed Automata with Myhill-Nerode Style Characterization." In Computer Aided Verification. Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-37706-8_1.

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AbstractWe present an algorithm to learn a deterministic timed automaton (DTA) via membership and equivalence queries. Our algorithm is an extension of the L* algorithm with a Myhill-Nerode style characterization of recognizable timed languages, which is the class of timed languages recognizable by DTAs. We first characterize the recognizable timed languages with a Nerode-style congruence. Using it, we give an algorithm with a smart teacher answering symbolic membership queries in addition to membership and equivalence queries. With a symbolic membership query, one can ask the membership of a certain set of timed words at one time. We prove that for any recognizable timed language, our learning algorithm returns a DTA recognizing it. We show how to answer a symbolic membership query with finitely many membership queries. We also show that our learning algorithm requires a polynomial number of queries with a smart teacher and an exponential number of queries with a normal teacher. We applied our algorithm to various benchmarks and confirmed its effectiveness with a normal teacher.
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Tang, Yunpeng, Muran Qi, Huiping Zhu, Zhenfeng Tong, and Chenglong Wang. "Mechanical and Numerical Simulation Analysis for the Insertion Section Sampling of Irradiation Charpy Specimen Reconstitution." In Springer Proceedings in Physics. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1023-6_23.

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AbstractThe reactor pressure vessel (RPV) is one of the most critical equipment in the pressurized water reactor, and its structural integrity is the key factor that determines the operational safety and service life of the reactor. In practical applications, the aging degree of RPV can be evaluated through the ductile-brittle transition temperature (DBTT) curve of the Charpy impact specimen pre-placed in RPV. However, due to the space limitation inside the reactor core, the available irradiation surveillance specimens are limited for mechanical testing. Especially, most reactors have faced the problem of life extension in recent years, and the impact data of the irradiation surveillance specimen is an important basis for the life extension of the reactor. One of the solutions is to reconstitute new Charpy specimens from the impacted ones to obtain more impact data. In this paper, the basic methods for the reconstitution of RPV material Ni-Cr-Mo-V steel are studied. By testing the hardness change of the Charpy impact broken specimen along the length direction, the maximum value of the plastic deformation zone of the impact fracture is obtained. Besides, based on the Gurson-Tvergaard-Needleman (GTN) model, the impact process of the material in the upper shelf temperature region is calculated by ABAQUS numerical simulation. Compared with the tested microhardness results of the material, the maximum length of the insert section of Charpy impact specimen reconstitution is confirmed. It shows that for Ni-Cr-Mo-V steel, the maximum length of the plastic deformation zone at the upper shelf temperature region is about 7 mm, and the insert length of the reconstituted specimens can be selected to 20 mm. The results can be used as an important reference for establishing the fabrication standard of the reconstituted Charpy specimen of the reactor pressure vessel.
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Płotka, Witold. "Toward a Phenomenology of Media." In Primary Sources in Phenomenology. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-63685-1_9.

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AbstractIn his aesthetics, as shown in Chap. 8, Blaustein formulated a sophisticated theory of the aesthetic experience and the aesthetic object. However, the value of his approach was evidenced not only by theoretical examinations but also by detailed and rich descriptions of different aesthetic phenomena. Whereas in the previous chapter I was interested in the basics of Blaustein’s aesthetic theory, the present chapter concerns its concrete applications; more precisely, I will outline his phenomenology of media as an example of the application of descriptive tools in the analysis of cinema and radio experiences. In doing so, I want to discuss Paul Majkut’s thesis that “[p]henomenological media studies begin with Roman Ingarden’s investigations into the ontology of a literary work, but extensions of ideas that were confirmed to print media are easily made to other media.” I attempt to show that Majkut did not take into account Blaustein’s contribution to the field, which was developed in the same period as Ingarden’s theory and which (contrary to Ingarden) directly addressed media (film and radio) experiences. Blaustein’s input was noticed by, for instance, Jan Czerkawski (together with Antoni B. Stępień and Stanisław Wielgus), Zofia Rosińska, Wioletta Miskiewicz, Jagna Brudzińska and, more recently, by Joanna Pluta. Czerkawski et al. called Blaustein “a pioneer in psychology pertaining to film and radio.” In this vein, Rosińska and Pluta also described him as a “pioneer” in studies on the reception of media and its influence on the human mind. Miskiewicz noted that Blaustein “[…] kept an active interest for research in […] media communication” and his research “[…] anticipated (with great subtlety) many theories, such as Wollheim’s ‘seeing-in’ in aesthetic theory and McLuhan’s ‘the medium is the message’ well known in media study.” In her text on aisthēsis and phantasma, Brudzińska identified Blaustein as the author of the “[…] first phenomenological theory of media,” in which he analyzed “[…] the mediating function of imaginative consciousness.” These views require a brief comment.
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Lutz, Alexander, and Axel Lachmeyer. "SciPPPer: Automatic Lock-Passage for Inland Vessels – Practical Results Focusing on Control Performance." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_85.

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AbstractNavigating through locks is one of the most challenging tasks that skippers have to perform in inland navigation. Typical dimensions of a ship (width = 11.45 m) and a lock (width = 12 m) result in an error margin of less than 30 cm to the left and to the right of the ship when navigating within a lock chamber. Typical inland vessels on European waters have a length of 82 to 186 m. The wheel house on cargo vessels is located close to the stern of the vessel. This leads to low visibility of the bow in the lock chamber. In order to cope with this issue, a deck hand monitors the bow and announces distances to the skipper via radio. The quality of this information depends on the deck hand’s ability to judge distances correctly and is prone to error. This highly demanding maneuver needs to be performed up to 15 times per day. Each lock passage can take up to 30 minutes. The research project SciPPPer aims at automating this complex navigational task.The German acronym SciPPPer stands for Schleusenassistenzsystem basierend auf PPP und VDES für die Binnenschifffahrt – lock assistant system based on PPP and VDES for inland navigation. The idea is to fully automate the navigation into and out of a lock using high-precision GNSS (Global Navigation Satellite System) with PPP (precise point positioning) correction data which is transmitted from shore to ship using VDES (VHF Data Exchange System), an extension to AIS (Automatic Identification System). This absolute measurement data is complemented by relative measurement data using LiDAR and automotive RADAR and fused with inertial measurement data delivered by a mechanical gyro system. Apart from the challenge of precisely measuring the position and orientation of the vessel within the lock chamber, the control task poses an interesting problem as well. This contribution introduces both, the measuring and the control problem. However, the focus lies on the results of the control performance that was achieved on a full-bridge simulator as well as during real-world trials. A full-bridge simulator was used in order to test the control strategy and its algorithms safely. A number of different actuator configurations were investigated. Typical inland cargo vessels use one or two propellers with Kort nozzle and a twin rudder behind each propeller and a 360° turnable bow thruster. Typical inland passenger vessels use several (2–4) 360° turnable rudder propellers as main propulsion as well as a 360° turnable bow thruster or a classical tunnel thruster which can only apply forces to starboard or portside. These typical configurations were examined by simulation. The real-world trials were performed on a passenger vessel with three rudder propellers as main propulsion as well as a classical tunnel bow thruster acting left and right.This contribution presents the results of the simulator study as well as the real-world trials in terms of control performance. It explains specific challenges due to the navigation within an extremely confined space. The contribution concludes with lessons learned as well as an outlook focusing on the potential of the introduction of such a system to the inland navigation market.
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Meyer, Susanne, and Robert Hawlik. "City Engagement in the Joint Programming Initiative Urban Europe and the Role of Intermediary Organizations in R&I Policies for Urban Transition." In Smart and Sustainable Planning for Cities and Regions. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-57764-3_19.

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AbstractThis research investigates the case of the Joint Programming Initiative (JPI) Urban Europe and its role as an intermediary organization, developing research, and innovation programs for urban transition. In the literature, the role of an intermediary organization has recently been discussed as an effective promoter and developer of connecting visions, strategies, activities, and stakeholders. A conceptual approach to intermediary organizations for urban transition is operationalized, and its functions are discussed in this paper. As an example, the Joint Programming Initiative Urban Europe reveals how a transnational R&I initiative, represented by 20 national R&I programs in Europe, can provide scientific evidence for sustainable urbanization with a cross-sectoral, integrated, inter- and transdisciplinary approach implemented through activities beyond joint calls. The findings show that JPI Urban Europe acts as broker and facilitator of joint visions and starts to build communities for innovation, which is one of the important functions of intermediaries. The development of its Strategic Research and Innovation Agenda clearly followed a co-creation process, putting the dilemmas of city practitioners in the center. JPI Urban Europe managed to attract high levels of commitment from a diversity of stakeholders to its strategic priorities and mobilized respective budgets for its implementation. The analysis of JPI Urban Europe participation in funded projects shows that challenge-driven calls (putting the problem owners in the center) seems to successfully develop a common language for all stakeholders and has a higher likelihood to generate more transformative outcomes. The number of funded urban living labs in projects shows that room for experimentation in niches and their extension is provided. The number of city representatives as funded project partners could be increased to further stimulate active involvement. The JPI Urban Europe also acts as a translator and enabler for learning in the urban—as well as in the policy sphere—the third function. This can be confirmed by the number and type of organizations reached with its specific formats. JPI Urban Europe coordinates joint activities of mainly national R&I programs but has only indirect influence on change in these organizations and limited influence on changes within research organizations, businesses, or cities that are even less connected. Overall, it can be concluded that the strategic ambition of JPI Urban Europe towards transformative change is obvious, but some instruments and formats to translate the ambition into action need further refinement, and it needs further in-depth research to better understand the outcomes and impacts of its diverse activities.
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Lobato, Lydia Maria, Rosaline Cristina Figueiredo e Silva, Thomas Angerer, Mônica de Cássia Oliveira Mendes, and Steffen G. Hagemann. "Iron Isotopes Applied to BIF-Hosted Iron Deposits." In Isotopes in Economic Geology, Metallogenesis and Exploration. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-27897-6_13.

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AbstractPublished and unpublished iron isotope data from banded iron formations (BIF) and their BIF-hosted hypogene (hydrothermal) iron ores from the Quadrilátero Ferrífero (itabirites), Corumbá, and Carajás iron districts in Brazil, as well as from the Hamersley province in Australia are presented and discussed. BIF constitutes a typically thinly bedded or laminated chemical sedimentary rock, with ≥ 15% Fe and layers of chert, chalcedony, jasper, or quartz, whereas itabirite is considered a laminated, metamorphosed iron formation rich in iron oxides, which may contain carbonate minerals, amphiboles, and abundant quartz. For the Paleoproterozoic Quadrilátero Ferrífero district, the range in δ56Fe values of hypogene iron ores is similar to that of the metamorphosed BIFs, and iron isotope variations are better distinguished in different regional deformational domains. Light isotopic compositions dominate in the low deformation domain (δ56Fe = −0.42 ± 0.12 to 0.29 ± 0.04‰), whereas the eastern, high-strain domain is characterized by heavy values (δ56Fe = −0.09 ± 0.08 to 0.37 ± 0.06‰; Mendes et al., Mineral Deposita 52:159–180, 2017). Iron isotope composition for the Neoproterozoic iron formations of the Corumbá region (hematitic, dolomite-rich: −1.83 and −0.83‰; cherty-hematite: δ56Fe −0.49‰) are controlled by: (1) primary seawater signature, (2) microbial activity, and (3) supergene goethite alteration. Hydrothermal alteration is reflected in the oxygen isotope data, but apparently not in the iron isotope fractionation. Iron and oxygen isotope pairing shows that δ56Fe values increase, while δ18O values decrease. In the Archean jaspilites of Carajás, hypogene ores tend to display lighter δ56Fe values than their host BIF counterparts. Also, there is a correlation between coupled iron and oxygen isotope values that is clearer towards lighter isotopic values, especially for δ18O. In the Paleoproterozoic Hamersley deposits, correlation between δ18O and δ56Fe values suggests a direct correlation of both isotope systems during low-grade, greenschist-facies metamorphism. On the other hand, despite the evident shift to negative δ18O values and apparent preservation of the metamorphic δ56Fe signature, iron ore and hydrothermally modified BIF show a correlation between δ18O and δ56Fe values. In contrast, in supergene-modified samples a negative correlation is apparent. The Carajás (+1.24 to + 0.44; one sample − 0.30‰) and Hamersley (+ 1.02 to − 0.29‰) hypogene ores display δ56Fe in a similar interval, reaching positive values, whereas ores from the Quadrilátero Ferrífero show a tendency towards lower values (to − 0.80‰). This review indicates that the application of iron isotopes in exploration is presently limited mainly due to the restricted dataset available for ore samples. Nevertheless, and despite all local differences, there is a general tendency for hypogene ores to display moderately lighter δ56Fe values for all deposits compared to precursor BIF. In contrast, a strong supergene imprint in ore leads to moderately heavier δ56Fe values. As more data become available, and if these trends are confirmed, the use of this tool may be valuable in the future, for instance to decipher the hypogene or supergene origin of specific ore zones, and as a consequence the probable depth extension or interpretation of concealed, deep orebodies.
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Schacher, Tom, and Tim Hart. "13. House extensions." In Constructing low-rise confined masonry buildings. Practical Action Publishing, 2018. http://dx.doi.org/10.3362/9781780449906.013.

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Atti di convegni sul tema "Confined extensions"

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Lhuillier, Emmanuel, Tung Hu Dang, Adrien Khalili, David Darson, Pierre Potet, and Angela Vasanelli. "Nanophotonics applied to the design of nanocrystal based infrared sensor." In CLEO: Applications and Technology. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_at.2024.jm4d.3.

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It's fascinating to witness the significant progress achieved in leveraging colloidal nanocrystals as a viable platform for infrared optoelectronics. Their adaptability as a spin-coatable resist with infrared photoactive properties has spurred developments that transcend mere material advancements and delve deeply into advanced device design. A standout accomplishment in the infrared domain is the development of infrared cameras utilizing nanocrystal thin films as their active layers. This marks a paradigm shift in infrared imaging, challenging the long-held focus on high-quality monocrystalli
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Otto, Kevin N., and Erik K. Antonsson. "Extensions to the Taguchi Method of Product Design." In ASME 1991 Design Technical Conferences. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/detc1991-0026.

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Abstract The Taguchi method of product design is an experimental approximation to minimizing the expected value of target variance for certain classes of problems. Taguchi’s method is extended to designs which involve variables each of which has a range of values all of which must be satisfied (necessity), and designs which involve variables each of which has a range of values any of which might be used (possibility). Tuning parameters, as a part of the design process, are also introduced into Taguchi’s method. The method is also extended to solve design problems with constraints, invoking the
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Jain, Abhinandan. "Recursive Algorithms Using Local Constraint Embedding for Multibody System Dynamics." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-87663.

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This paper describes a constraint embedding approach for handling of local closure constraints in multibody system dynamics. The approach uses spatial operator techniques to eliminate local-loop constraints from a system to effectively convert it into a tree-topology system. This conversion to a tree-topology allows the direct application of the host of available techniques including mass matrix factorization and inversion to be applied to the system dynamics. One application is the extension of the well-known recursive O(N) forward dynamics for solving the system dynamics of these systems. Th
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Jella, Sandeep E., Jeffrey M. Bergthorson, Pierre Q. Gauthier, and Gilles Bourque. "CFD Modeling of Equivalence Ratio Effects on a Pressurized Turbulent Premixed Flame." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-58074.

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At a given power level, lean premixed (DLE) gas turbines vary equivalence ratio (ϕ) for optimal performance. This range is usually determined by variations in ambient conditions, acoustic response of the system, and emissions trade-off (e.g. between NOx and CO). In this work, the effects of ϕ variation on premixed jet flame lengths are investigated, by modeling the pressurized jet experiments of Griebel et al. [1]. While previous modeling of these experiments focused on a priori tabulated chemistry based methods, in this work we investigate an approach that represents finite-rate effects expli
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Keller, James M., Mihail Popescu, and Dustin Gibeson. "An extension of a confined space evacuation model to human geography." In IGARSS 2012 - 2012 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2012. http://dx.doi.org/10.1109/igarss.2012.6350861.

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Brown, John Paul, and Rajarajan Narayanasamy Naidu. "Lateral Extension in Response to Late Stage Transpression, An Example from the Zhdanov Field, Caspian Sea - An Alternative to Flower Structures." In Gas & Oil Technology Showcase and Conference. SPE, 2023. http://dx.doi.org/10.2118/214213-ms.

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Abstract The Zhdanov Field is located on the eastern margin of the Caspian Sea and is geologically a part of the Apsheron-PreBalkan Fault Zone which crosses the Caspian Sea from Azerbaijan to Turkmenistan. Structurally, the field is part of an east-west orientated plunging anticline (hereafter referred to as the Cheleken Nose) that plunges westwards from the Cheleken Dome for over 25 km into the Caspian Sea. The structure of the Zhdanov Field formed in response to Pleistocene to Recent (post Apsheron) transpressive reactivation of a pre-existing fault at the Miocene and deeper levels (hereafte
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Mayne, R. W. "Position and Motion Planning in a Confined Region via Nonlinear Programming." In ASME 1987 Design Technology Conferences. American Society of Mechanical Engineers, 1987. http://dx.doi.org/10.1115/detc1987-0015.

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Abstract This paper describes the formulation of a position and motion planning problem in an optimization setting. Emphasis is placed on planning movements in a confined workspace where contacts must be avoided. The formulation includes the possibility of extra degrees of freedom and is demonstrated in detail on a simple robot problem. Robot positioning and trajectory planning are considered within a two dimensional workspace and a recursive quadratic programming procedure is used for the optimization. The results presented herein show satisfactory performance and considerable promise for ext
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Matsumoto, Kazuya, Yusuke Morita, and Eiji Nakamachi. "Development of Hybrid Electromagnetic and Mechanical Stimulation System for Enhancement of Nerve Axonal Extension." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-65593.

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Recently, the electromagnetic and mechanical stimulation have been recognized as the effective extracellular environmental factor to enhance the defected peripheral nerve tissue regeneration. We designed and fabricated a bioreactor device, which can load the uniform AC magnetic field (ACMF) and the uniform tensile strain to stimulate PC12 nerve cell. For ACMF stimulation system, we used the pole piece structure to enable the uniform ACMF and in-situ microscopic observation. We confirmed the uniformity of magnetic field in the experiments. Further, the uniform strain in the stretch stimulation
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Matsuzawa, Hiroshi, and Toru Osaki. "Fracture Behavior of Thermally Aged Primary Coolant Piping Made of Cast Stainless Steel." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93033.

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The fracture toughness of primary coolant piping made of duplex cast stainless steel can be reduced by thermal aging, at the operating temperature of a light water reactor, to that of so-called low upper shelf reactor pressure vessel steel. Compared to reactor pressure vessels, the crack detection ability of ultrasonic testing of primary coolant piping is inferior. It is therefore important to establish a standard procedure to assess the structural integrity of thermally aged primary coolant piping. Crack extensions on the inner surface of scale model primary coolant piping were measured in fo
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Souza Mendes, P. R., R. L. Thompson, and A. O. Nieckele. "Analysis of the Convergent Channel as an Extensional Rheometer." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-1170.

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Abstract An important aspect while designing an “R2 z = constant” convergent channel as an extensional rheometer is the appropriate choice of the geometrical parameters and of the Reynolds number range of operation. The higher is the Reynolds number value, the thinner will be the boundary layer where the undesirable no-slip effect is confined, as discussed in the literature. However, if the Reynolds number, Re, is too large, then shear-related pressure losses become important, which is also undesirable in rheometry. Therefore, one design task is to find a range of Re within which the boundary
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Rapporti di organizzazioni sul tema "Confined extensions"

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Schat, Karel Antoni, Irit Davidson, and Dan Heller. Chicken infectious anemia virus: immunosuppression, transmission and impact on other diseases. United States Department of Agriculture, 2008. http://dx.doi.org/10.32747/2008.7695591.bard.

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1. Original Objectives. The original broad objectives of the grant were to determine A) the impact of CAV on the generation of cytotoxic T lymphocytes (CTL) to reticuloendotheliosis virus (REV) (CU), B). the interactions between chicken anemia virus (CAV) and Marek’s disease virus (MDV) with an emphasis on horizontal spread of CAV through feathers (KVI), and C) the impact of CAV infection on Salmonella typhimurium (STM) (HUJI). During the third year and the one year no cost extension the CU group included some work on the development of an antigen-antibody complex vaccine for CAV, which was pa
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