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Littérature scientifique sur le sujet « Critical scale regime »

Auteur : Grafiati

Publié le 2 juin 2025

Mis à jour le 31 juillet 2025

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Articles de revues sur le sujet "Critical scale regime"

Mei, Huan, Kunshan Li, Qian Liu, Bin Wang, and Xiangbai Wu. "Interaction of a Hysteresis Western Boundary Current with a Large-Scale Marginal Sea Circulation in a Gap-Leaping System." Journal of Physical Oceanography 53, no. 3 (2023): 943–57. http://dx.doi.org/10.1175/jpo-d-22-0194.1.

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Abstract The influence of a large-scale circulation (LSC) in a marginal sea on a hysteresis western boundary current (WBC) flowing across a gap is studied using a nonlinear 1.5-layer ocean model. Results show that both single-gyre LSC and double-gyre LSC are able to induce the critical-state WBC transition from the eddy-shedding regime to the leaping regime, while only double-gyre LSC is able to induce the critical-state WBC transition from the leaping regime to the eddy-shedding regime. The dynamics of WBC transition suggests that the meridional advection enhanced by the perturbation of the L

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Dhara, S., and R. v. d. Hofstad. "Barely Supercritical Percolation on Poissonian Scale-free Networks." Markov Processes And Related Fields, no. 2024 №1 (30) (May 27, 2024): 27–55. http://dx.doi.org/10.61102/1024-2953-mprf.2024.30.1.001.

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We study the giant component problem slightly above the critical regime for percolation on Poissonian random graphs in the scale-free regime, where the vertex weights and degrees have a diverging second moment. Critical percolation on scale-free random graphs has been observed to have incredibly subtle features that are markedly different compared to those in random graphs with a converging second moment. In particular, the critical window for percolation depends sensitively on whether we consider single- or multi-edge versions of the Poissonian random graph. In this paper, and together with o

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Jin, Xin, Hai Wang, and Caixin Feng. "Space Charge Effect and Resistance Switching in Doped Monocrystalline Silicones." Applied Sciences 9, no. 3 (2019): 434. http://dx.doi.org/10.3390/app9030434.

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In this work, we report the nonlinear carriers’ transport in n-doped monocrystalline silicone with millimeter-scale length. Ohm, effective trap filling, and Mott–Gurney regimes are distinguished from the current–voltage (I–V) curve. Two critical voltages are identified for the lower and upper limitations of an effective trap-filling regime. Meanwhile, the electrode spacing, temperature, and magnetic field dependence of the two critical voltages are demonstrated experimentally. In particular, we propose that the effective trap-filling process is irreversible under electric field. It is observed

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Mauritsen, Thorsten, and Gunilla Svensson. "Observations of Stably Stratified Shear-Driven Atmospheric Turbulence at Low and High Richardson Numbers." Journal of the Atmospheric Sciences 64, no. 2 (2007): 645–55. http://dx.doi.org/10.1175/jas3856.1.

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Abstract Stably stratified shear-driven turbulence is analyzed using the gradient Richardson number, Ri, as the stability parameter. The method overcomes the statistical problems associated with the widely used Monin–Obukhov stability parameter. The results of the Ri-based scaling confirm the presence of three regimes: the weakly and the very stable regimes and the transition in between them. In the weakly stable regime, fluxes scale in proportion with variance, while in the very stable regime, stress and scalar fluxes behave differently. At large Ri, the velocity field becomes highly anisotro

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Zanchi, D. "Angle-resolved study of density waves, superconductivity and pseudogap in two dimensions." Journal de Physique IV 12, no. 9 (2002): 65–68. http://dx.doi.org/10.1051/jp4:20020356.

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Weakly correlated electrons on a square lattice are studied by angle-resolved functional renormalization group. Upon renormalization the interaction starts to depend on monienta and has pole-like solutions near the doping-dependent critical scale. Near half-filling this critical scale is the pseudogap temperature T*. In the overdoped regime the critical scale is the mean-field like critical temperature for d-wave superconductivity.

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Tjernström, Michael, Ben B. Balsley, Gunilla Svensson, and Carmen J. Nappo. "The Effects of Critical Layers on Residual Layer Turbulence." Journal of the Atmospheric Sciences 66, no. 2 (2009): 468–80. http://dx.doi.org/10.1175/2008jas2729.1.

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Abstract The authors report results of a study of finescale turbulence structure in the portion of the nocturnal boundary layer known as the residual layer (RL). The study covers two nights during the Cooperative Atmosphere–Surface Exchange Study 1999 (CASES-99) field experiment that exhibit significant differences in turbulence, as indicated by the observed turbulence dissipation rates in the RL. The RL turbulence sometimes reaches intensities comparable to those in the underlying stable boundary layer. The commonly accepted concept of turbulence generation below critical values of the gradie

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Grandey, B. S., and P. Stier. "A critical look at spatial scale choices in satellite-based aerosol indirect effect studies." Atmospheric Chemistry and Physics 10, no. 23 (2010): 11459–70. http://dx.doi.org/10.5194/acp-10-11459-2010.

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Abstract. Analysing satellite datasets over large regions may introduce spurious relationships between aerosol and cloud properties due to spatial variations in aerosol type, cloud regime and synoptic regime climatologies. Using MODerate resolution Imaging Spectroradiometer data, we calculate relationships between aerosol optical depth τa derived liquid cloud droplet effective number concentration Ne and liquid cloud droplet effective radius re at different spatial scales. Generally, positive values of dlnNedlnτa are found for ocean regions, whilst negative values occur for many land regions.

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Cheng, Edmund W. "Street Politics in a Hybrid Regime: The Diffusion of Political Activism in Post-colonial Hong Kong." China Quarterly 226 (May 26, 2016): 383–406. http://dx.doi.org/10.1017/s0305741016000394.

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AbstractThis paper examines the diffusion of activism in post-colonial Hong Kong through the lens of the political regime and eventful analysis. It first reveals the institutional foundations of the hybrid regime that allowed the creation of a nascent movement society. It then explains how the historic 1 July rally in 2003 and a series of critical events since 2006 have led to a shift in scale and the public staging of street politics. A time-series analysis and onsite survey further capture the dynamics that spawned the collective recognition of grievances and reduced participation costs, lea

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Ménesguen, Claire, J. C. McWilliams, and M. J. Molemaker. "Ageostrophic instability in a rotating stratified interior jet." Journal of Fluid Mechanics 711 (September 28, 2012): 599–619. http://dx.doi.org/10.1017/jfm.2012.412.

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AbstractOceanic large- and meso-scale flows are nearly balanced in forces between Earth’s rotation and density stratification effects (i.e. geostrophic, hydrostatic balance associated with small Rossby and Froude numbers). In this regime advective cross-scale interactions mostly drive energy toward larger scales (i.e. inverse cascade). However, viscous energy dissipation occurs at small scales. So how does the energy reservoir at larger scales leak toward small-scale dissipation to arrive at climate equilibrium? Here we solve the linear instability problem of a balanced flow in a rotating and

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Grandey, B. S., and P. Stier. "A critical look at spatial scale choices in satellite-based aerosol indirect effect studies." Atmospheric Chemistry and Physics Discussions 10, no. 6 (2010): 15417–40. http://dx.doi.org/10.5194/acpd-10-15417-2010.

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Abstract. Analysing satellite datasets over large regions may introduce spurious relationships between aerosol and cloud properties due to spatial variations in aerosol type, cloud regime and synoptic regime climatologies. Using MODerate resolution Imaging Spectroradiometer data, we calculate relationships between aerosol optical depth τa, derived liquid cloud droplet effective number concentration Ne and liquid cloud droplet effective radius re at different spatial scales. Generally, positive values of dlnNe dlnτa are found for ocean regions, whilst negative values occur for many land regions

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Plus de sources

Thèses sur le sujet "Critical scale regime"

TARTUFERI, Emanuele. "L'impronta ecologica della Regione Marche." Doctoral thesis, 2018. http://hdl.handle.net/11393/251180.

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Il lavoro di ricerca si basa sul metodo di calcolo dell'impronta ecologica, un indicatore complesso che permette di stimare l'impatto di una determinata popolazione sull'ambiente attraverso il consumo di risorse e la richiesta di assimilazione di rifiuti da parte di una determinata popolazione e di esprimere queste grandezze in termini di superficie di territorio produttivo corrispondente. La tesi è divisa in tre singoli lavori accademici: nel primo viene introdotta la metodologia di calcolo e vengono passate in rassegna le principali applicazioni dell'impronta ecologica su scala globale, n

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Livres sur le sujet "Critical scale regime"

Idler, Annette, and Juan Carlos Garzón Vergara, eds. Transforming the War on Drugs. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197604359.001.0001.

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This book asks how the international community can tackle the complex causes and consequences that the War on Drugs is intended to address. This question arises against the backdrop of the War on Drugs’ failure to significantly reduce the scale or impact of illicit drug production and trafficking as well as the lack of consensus on the way forward in the international policy debate. Challenging conventional defense- and security-sector thinking, this book constitutes the first comprehensive, systematic effort to theoretically, conceptually, and empirically investigate the effects of the intern

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Kil, Sang Hea. Covering the Border War. The Rowman & Littlefield Publishing Group, 2019. https://doi.org/10.5040/9781666992809.

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Covering the Border War: How the News Media Create Crime, Race, Nation, and the USA-Mexico Divide examines the notion of the body politic in border newspaper coverage of the USA-Mexico divide and how the nation and immigration are racially imagined in crime news discourse, where whiteness is associated with order and brownness is associated with disorder in a variety of imaginative, nativist ways. By applying critical discourse analysis methodology to the Los Angeles Times, Arizona Republic, Albuquerque Journal, and Houston Chronicle during a peak epoch of border militarization policies (1993–

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Brook, Barry W., Erle C. Ellis, and Jessie C. Buettel. What is the evidence for planetary tipping points? Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198808978.003.0008.

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This chapter critically evaluates the likelihood that planet Earth will cross one or more global environmental tipping points, resulting in a degraded state that would be difficult to reverse. Ecological tipping points occur when components of a system change rapidly due an initial forcing that is amplified by positive feedbacks, resulting in a regime shift. The chapter examines the evidence in support of biological and geophysical boundaries that clearly delimit a “safe operating space” for people and biodiversity. For individual ecosystems, abrupt state transitions have been documented. Howe

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Gourlay, Lesley. University and the Algorithmic Gaze. Bloomsbury Publishing Plc, 2025. https://doi.org/10.5040/9781350281608.

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This open access book takes an innovative and critical look at the ways in which digital data and algorithms are changing the face of higher education in multiple ways.It examines their impact at both the macro scale of universities and systems worldwide, but also at the more subtle level of effects on academics and students. In doing so, it focuses on the day-to-day life of the university, examining how the digital is changing the way that we communicate, learn, and create new knowledge. As well as exploring the role of ‘big data’ and learning analytics, the book also focuses on areas of acad

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Tourism, climate change and the geopolitics of arctic development: the critical case of Greenland. CABI, 2021. http://dx.doi.org/10.1079/9781789246728.0000.

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Abstract This book focuses on the context, nature and role of tourism in Greenland, and is set within an overlapping geopolitical frame of: (a)the heightening climate crisis; (b)Greenland's trajectory towards political independence from Denmark; (c)its concept of economic 'self-sustainability' in supporting this trajectory; and (d)growing international interest in, and competition for, Greenland's natural resources and infrastructure projects. The last in its turn partly reflects improving land and sea accessibility afforded by climate change, which paradoxically both challenges and encourages

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Luz, Nimrod. The Politics of Sacred Places. Bloomsbury Publishing Plc, 2023. http://dx.doi.org/10.5040/9781350295759.

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The Politics of Sacred Places is a study of the socio-political dimensions of sacred sites in Israel–Palestine, drawing on over 20 years of in-depth ethnographic research which introduces cutting-edge theories on secularization, struggles for recognition, and diversity issues. This book focuses on contemporary sacred sites and their socio-political meanings for minorities within a hegemonic and a secularizing state-system. It argues that sacred places provide a space that is less scrutinized by the state and where alternative visions of the socio-political may be produced. A plethora of sites

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Ege, Gian, Andreas Schloenhardt, and Christian Schwarzenegger. Wildlife Trafficking: the illicit trade in wildlife, animal parts, and derivatives. Carl Grossmann, 2020. http://dx.doi.org/10.24921/2020.94115945.

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Wildlife trafficking threatens the existence of many plant and animal species and accelerates the destruction of wildlife, forests, and other natural resources. It contributes to environmental degradation, destroys unique natural habitats, and deprives many countries and their populations of scarce renewable resources. The more endangered a species becomes, the greater is the commercial value that is put on the remaining specimen, thereby increasing the incentive for further illegal activities. Preventing and supressing the illegal trade in wildlife, animal parts, and plants is presently not a

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Ryan, John Charles. Southeast Asian Ecocriticism. The Rowman & Littlefield Publishing Group,Inc., 2017. https://doi.org/10.5040/9781978731233.

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Southeast Asian Ecocriticism presents a timely exploration of the rapidly expanding field of ecocriticism through its devotion to the writers, creators, theorists, traditions, concerns, and landscapes of Southeast Asian countries. While ecocritics have begun to turn their attention to East and South Asian contexts and, particularly, to Chinese and Indian cultural productions, less emphasis has been placed on the diverse environmental traditions of Southeast Asia. Building on recent scholarship in Asian ecocriticism, the book gives prominence to the range of theoretical models and practical app

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Czajka, Agnes, and Áine O’Brien, eds. Art, Migration and the Production of Radical Democratic Citizenship. The Rowman & Littlefield Publishing Group, 2022. https://doi.org/10.5040/9798881809577.

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Contemporary Europe – ridden by social, political and economic crises, overlaid onto colonial and imperial trajectories, and shaken by the shockwaves generated by Brexit and wide scale human displacement – has become a space in which citizenship and belonging are contested, disrupted, performed and produced anew. Art, Migration, and the Production of Radical Democratic Citizenshipexplores the contribution of migrant and refugee artists to the performance and production of radical democratic citizenship in Europe. It foregrounds the insights of artists and cultural actors with diverse experienc

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Russell-Smith, Jeremy, Peter Whitehead, and Peter Cooke, eds. Culture, Ecology and Economy of Fire Management in North Australian Savannas. CSIRO Publishing, 2009. http://dx.doi.org/10.1071/9780643098299.

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This engaging volume explores the management of fire in one of the world’s most flammable landscapes: Australia’s tropical savannas, where on average 18% of the landscape is burned annually. Impacts have been particularly severe in the Arnhem Land Plateau, a centre of plant and animal diversity on Indigenous land.  Culture, Ecology and Economy of Fire Management in North Australian Savannas documents a remarkable collaboration between Arnhem Land’s traditional landowners and the scientific community to arrest a potentially catastrophic fire-driven decline in the natural and cultural asse

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Chapitres de livres sur le sujet "Critical scale regime"

Yu, Xiubo, Yu Liu, Shuli Niu, Wei Zhao, Chao Fu, and Zhi Chen. "Structure, Functions, and Interactions of Dryland Ecosystems." In Dryland Social-Ecological Systems in Changing Environments. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-9375-8_3.

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AbstractUnderstanding the interactions between the structures and functions underlying regime shifts in dryland social-ecological systems (SESs) and how they respond to climate change is critical for predicting and managing the future of these ecosystems. Due to the high spatiotemporal variability and sensitivity of drylands ecosystem to natural and anthropogenic disturbances, it is challenging to predict the state shifts of dryland SESs. This theme delves into the mechanisms and geographical heterogeneity of resilience and the maintenance of the stability of dryland SESs that involve threshol

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Nazarov, Mykola. "National Resilience and Post-war Reconstruction of Ukraine." In Contributions to Security and Defence Studies. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-66434-2_5.

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AbstractSuccessful post-war reconstruction of Ukraine is possible due to critical analysis of the previous experience of state building and taking into account the main mistakes. In this chapter, we analyze the dynamics of the Ukrainian political regime over the past 15 years, key changes in the security and defense sector of the state as well as critical decisions in the economic and energy spheres. Despite significant changes in Ukrainian politics after the start of the war in 2014, it is necessary to note systemic problems in the economic, energy, and military spheres that prevented full pr

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Aakala, Tuomas, Cécile C. Remy, Dominique Arseneault, et al. "Millennial-Scale Disturbance History of the Boreal Zone." In Advances in Global Change Research. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-15988-6_2.

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AbstractLong-term disturbance histories, reconstructed using diverse paleoecological tools, provide high-quality information about pre-observational periods. These data offer a portrait of past environmental variability for understanding the long-term patterns in climate and disturbance regimes and the forest ecosystem response to these changes. Paleoenvironmental records also provide a longer-term context against which current anthropogenic-related environmental changes can be evaluated. Records of the long-term interactions between disturbances, vegetation, and climate help guide forest mana

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Le Coze, Jean-Christophe. "Climate Change, Global Scales and Safety." In Climate Change and Safety in High-Risk Industries. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-56995-1_2.

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AbstractThe argument of this chapter is that climate change is one change among many which currently affect the operating landscape of safety-critical systems, and that safety research should adapt its lenses to capture these changes. Climate change, which could, perhaps, preferably be described as global warming, should therefore not be considered in isolation but in relation to other changes (e.g., globalization, digitalization). One task for safety research is therefore to identify, to empirically study and to explore the implications of such changes for safety but also to address their the

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Kelly, Ashley Scott, and Xiaoxuan Lu. "From Land-Locked to Land-Linked?" In Critical Landscape Planning during the Belt and Road Initiative. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-4067-4_3.

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AbstractThis chapter, From land-locked to land-linked? Laos within a continuum of connectivity in the Mekong region, constructs a history of infrastructure-building in Laos understood through economic connectivity. This chapter challenges the dominant narrative of a de-historicized, often linear progression from land-locked to land-linked or from isolation to integration by contextualizing the contemporary imaginations and developments of Laos within the broader social, economic and political transitions across the Mekong region. We examine the malleable identities of “Laos,” “border” and “inf

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Kelly, Ashley Scott, and Xiaoxuan Lu. "Chinese Mass Nature Tourism and Ecotourism." In Critical Landscape Planning during the Belt and Road Initiative. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-4067-4_7.

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AbstractThis chapter features two planning proposals that engage the ideological and practical frictions between Chinese mass nature tourism and ecotourism. Employed by China’s southwestern frontier provinces as a development model since the early 2000s, mass nature tourism is driven by an economic ideology that appropriates an “impoverished” region and its population as resources. In recent years, the Chinese model of mass nature tourism has been introduced into northern Laos. These large-scale tourism programs may arguably prove economically viable but unavoidably raise ethical, cultural and

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Gemignani, Carlo Alberto. "Massimo Quaini: la Liguria labirinto e laboratorio." In Il pensiero critico fra geografia e scienza del territorio. Firenze University Press, 2021. http://dx.doi.org/10.36253/978-88-5518-322-2.16.

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Liguria was the great ‘action scenario’ for Massimo Quaini. A region that, thanks to historical and environmental conditions, allowed him to read in advance phenomena and dynamics that would later occur at a national scale. This contribution does not pretend to exhaust the substance of a relationship that goes beyond the scientific level and involves deep existential bonds, but only to provide some elements to draw a first map of the scientific reasons that have linked the scholar to his land of belonging. This reflection will hopefully serve to define how much Liguria is found in Massimo Quai

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Kapu, Venkatesh, Vanita Noronha, Nandini Menon, Minit Shah, Shripad Banavali, and Kumar Prabhash. "Metronomic Chemotherapy and Low-Dose Immunotherapy: An Intriguing Story." In Critical Issues in Head and Neck Oncology. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-84539-0_23.

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Abstract Current treatment protocols are not curative for some cancers, despite significant advancements in cancer research. To enhance the treatment of cancer, it is therefore crucial to investigate novel therapeutic targets and approaches. Metronomic chemotherapy (MCT) is novel and effective treatment approach for solid tumors and blood malignancies which entails the continuous administration of low-dose cytotoxic medications in contrast to conventional chemotherapy regimens. The main characteristics of MCT are: frequent, uninterrupted, dose-dense chemotherapy administration; use of a biolog

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Boni, Alice Selene. "Urban Living Labs: Insights for Institutionally Promoted Urban Policies." In The Urban Book Series. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-19748-2_4.

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AbstractThis chapter presents the results of a study that analyzed the conditions in which it is possible to scale-up to the Urban Living Lab (ULL) approach, which was developed in large-scale social housing neighbourhoods, characterized by phenomena of social and spatial marginalization. Specifically, the aim of the study is to provide indications and tools, but also indicate challenges and critical issues to those public institutions interested in promoting and adopting, in such contexts, the ULL approach for programmes of social and/or urban regeneration. The study is based on a comparative

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Hovick, Torre J., Courtney J. Duchardt, and Cameron A. Duquette. "Rangeland Biodiversity." In Rangeland Wildlife Ecology and Conservation. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-34037-6_8.

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AbstractIn its simplest form, biodiversity is defined as species richness (the number of species in a given area). More complex definitions include the variety of life on Earth, from genes to ecosystems, and include the ecological and evolutionary processes that sustain that life. As in other ecosystems, biological communities in rangelands are influenced by a number of different abiotic and biotic drivers or “filters” at both broad and fine scales, and an understanding of these processes is critical for maintaining ecosystem services as well as addressing widespread biodiversity declines. In

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Actes de conférences sur le sujet "Critical scale regime"

Dolgova, Elizaveta. "Critical Regime of Combustion Process Taking into Account the Consumption of the Oxidizer." In 2024 17th International Conference on Management of Large-Scale System Development (MLSD). IEEE, 2024. http://dx.doi.org/10.1109/mlsd61779.2024.10739427.

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Schmitt, Guenter, Christoph Werner, and Mirdash Bakalli. "Fluid Mechanical Interactions of Turbulent Flowing Liquids with the Wall - Revisited with a New Electrochemical Tool." In CORROSION 2005. NACE International, 2005. https://doi.org/10.5006/c2005-05344.

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Abstract Flow induced localized corrosion (FILC), i.e. erosion corrosion, is initiated and developed beyond critical flow intensities. However, it appears difficult to quantify such critical flow intensities because none of the terms tried so far (e.g. „critical flow velocities" given in m/s, „critical Reynolds Numbers" (dimensionless), or „critical wall shear stresses" given in Pa) represent the real hydrodynamic forces responsible for the mechanical destruction of protective scales as a precondition for FILC initiation. In recent years critical wall shear stresses have been measured for a nu

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Christensen, Curt, and R. T. Hill. "Corrosion Fatigue Assessment for Sour Crude Oil Pipelines." In CORROSION 1988. NACE International, 1988. https://doi.org/10.5006/c1988-88054.

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Abstract Unlike sour gas pipelines the transmission of sour crude oil must take into consideration the effects of cyclic (fatigue) loading resulting from normal operating conditions as well as from sporadic periods of pressure surge. The significance of flaws in the weld toe region of double submerged-arc welded large diameter line pipe was studied utilizing laboratory and full-scale testing methods. The laboratory test program characterized the critical crack size using the fracture mechanics parameter, KISCC, as well as predicted sub-critical crack growth rate using a Paris exponential funct

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Alhusayni, Musab, Abdulelah Mehlisi, Mohammed Kanwi, Mohammad Alazzeh, Bandar Al Shammari, and Khaled Dubayan. "Transitioning towards FRP Manhole Covers. A Case Study and Success Story on an Urban Scale." In MECC 2023. AMPP, 2023. https://doi.org/10.5006/mecc2023-20081.

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Abstract Manhole covers are critical component for the safety of manholes in rural and urban areas. The conventional design of such manhole covers is made from conventional cast iron steel, which is costly, has a greater impact on the environment and will corrode due to the environment in which they are placed in. Alternative options such as FRP manhole covers are made from composite material, corrosion resistant and far more sustainable than the conventional alternative. While FRP Manhole Covers have been adopted in various places around the world, some places such as the GCC region are still

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Yin, Decao, Halvor Lie, and Rolf J. Baarholm. "Prototype Reynolds Number VIV Tests on a Full-Scale Rigid Riser." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-61415.

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Slender offshore structures in deep water subjected to currents may experience vortex-induced vibrations (VIV), which can cause significant fatigue damage. Extensive experimental researches have been conducted to study the VIV in the past several decades. However, most of the experimental works have small-scale models and relatively low Reynolds number (Re) - ‘subcritical’ or even lower Reynolds number regime. There is a lack of full understanding the VIV in prototype Re flow regime. Applying the results with low Re to a full scale riser with prototype Re might have uncertainties due to the sc

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Graham, Gordon M., Hunter Thomson, Deborah Bowering, and Robert Stalker. "Correlation of Shear and Turbulence on Scale Formation and Inhibition." In SPE International Oilfield Scale Conference and Exhibition. SPE, 2014. http://dx.doi.org/10.2118/spe-169761-ms.

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Abstract Current scale risk analysis focuses on thermodynamic calculations to determine the risk of scale, ignoring system kinetics and the impact of flow regimes on scale precipitation from mildly oversaturated systems. It is however recognised that flow regimes affect scale precipitation. Surface growth is influenced by mass transport and diffusion which are susceptible to shear stress and turbulence. Little work has been reported which examine these factors under conditions that can be readily tuned to match field production conditions. Scale inhibitor evaluation exercises therefore often r

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Alteraifi, Abdullatif M. "Dimensional Effects in Interfacial Tension Micro-Scale Measurements." In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45145.

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Three different experimental configurations to measure oilwater interfacial tension (IFT) are developed using micropipet manipulation technique. By applying the minimum suction pressure required for the interface to flow in a micro-size pipet, IFT is calculated using Young-Laplace equation by achieving mechanical equilibrium condition for the two liquids separated by an interface. The three different configurations produced similar results for critical pressure measurements versus pipet diameter. IFT measurements using micropipet technique found to fall within two regimes: geometry-dependent r

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Vorhauer, Nicole, P. Först, H. Schuchmann, and E. Tsotsas. "Pore network model of primary freeze drying." In 21st International Drying Symposium. Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/ids2018.2018.7284.

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The pore scale progression of the sublimation front during primary freeze drying depends on the local vapor transport and the local heat transfer as well. If the pore space is size distributed, vapor and heat transfer may spatially vary. Beyond that, the pore size distribution can substantially affect the physics of the transport mechanisms if they occur in a transitional regime. Exemplarily, if the critical mean free path is locally exceeded, the vapor transport regime passes from viscous flow to Knudsen diffusion. At the same time, the heat transfer is affected by the local ratio of pore spa

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Dai, Zhaoyi Joey, Amy Kan, Yi-Tsung Alex Lu, et al. "Novel Mineral Scale Deposition Model Under Different Flow Conditions with or Without Scale Inhibitors." In SPE International Conference on Oilfield Chemistry. SPE, 2021. http://dx.doi.org/10.2118/204373-ms.

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Abstract Mineral scale formation causes billions of dollars’ loss every year due to production losses and facility damages in the oil and gas industry. Accurate predictions of when, where, how much, and how fast scale will deposit in the production system and how much scale inhibitor is needed are critical for scale management. Unfortunately, there is not a sophisticated scale deposition model available, potentially due to the challenges below. First, an accurate thermodynamic model is not widely available to predict scale potential at extensive ranges of temperature, pressure, and brine compo

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de With, G., and A. E. Holdo̸. "The Use of Solution Adaptive Grid for Modelling Small Scale Turbulent Structures." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56515.

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The use of Large Eddy Simulation (LES) is computationally intensive and various studies demonstrated the considerable range of vortex scales to be resolved in an LES type of simulation. The purpose of this study is to investigate the use of a Dynamic Grid Adaptation (DGA) algorithm. Despite many developments related to adaptive methods and adaptive grid strategies, the use of DGA in the context of turbulence modelling is still not well understood, and various profound problems with DGA in relation to turbulence modelling are still present. The work presented in this paper focuses on the numeri

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Rapports d'organisations sur le sujet "Critical scale regime"

Perdigão, Rui A. P., and Julia Hall. Spatiotemporal Causality and Predictability Beyond Recurrence Collapse in Complex Coevolutionary Systems. Meteoceanics, 2020. http://dx.doi.org/10.46337/201111.

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Causality and Predictability of Complex Systems pose fundamental challenges even under well-defined structural stochastic-dynamic conditions where the laws of motion and system symmetries are known. However, the edifice of complexity can be profoundly transformed by structural-functional coevolution and non-recurrent elusive mechanisms changing the very same invariants of motion that had been taken for granted. This leads to recurrence collapse and memory loss, precluding the ability of traditional stochastic-dynamic and information-theoretic metrics to provide reliable information about the n

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Diouf, Awa, Marco Carreras, and Fabrizio Santoro. Taxing Mobile Money in Kenya: Impact on Financial Inclusion. Institute of Development Studies, 2024. http://dx.doi.org/10.19088/ictd.2024.039.

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Financial inclusion – where individuals and businesses have access to useful and affordable financial products and services that meet their needs, delivered in a responsible and sustainable way – is a critical component of economic development. It is particularly important in sub-Saharan Africa (SSA), where there can be little traditional banking infrastructure. The success of M-PESA in Kenya shows that mobile money is helping financial inclusion in the region. Those in rural or underserved areas can use mobile money to access basic financial services – savings, payments, and credit – through

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Serra, Lucila, Diana Smallridge, Barbara Buchner, José Juan Gomes Lorenzo, Chiara Trabacchi, and Maria Netto. The Role of National Development Banks in Intermediating International Climate Finance to Scale Up Private Sector Investments. Inter-American Development Bank, 2012. http://dx.doi.org/10.18235/0006938.

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Significant investments are needed to support the global transition to a low-carbon, climate resilient future. Current finance flows fall short of global financing needs, and massive scaling up is needed to unlock additional financial resources and foster a sustainable investment pathway. Overcoming barriers to private sector investments is critical, and international climate finance can play a catalytic role in this regard. National development banks (NDBs) have a unique role in this context, both complementing and catalyzing private sector players. NDBs have a privileged position in their lo

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Donovan, Michael G., and Jolyne Sanjak. A Methodological Framework for Comparative Land Governance Research in Latin America and the Caribbean. Inter-American Development Bank, 2016. http://dx.doi.org/10.18235/0009291.

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Strengthening land governance is critically needed in Latin America and the Caribbean to protect the environment, achieve gender equality in land rights, expand the transparency of land records, and facilitate planned urban growth. Inadequate land administration limits the development of housing markets, tax collection, and the scale and speed of housing and land regularization programs in low-income communities. The region faces major challenges in land tenure informality and overlapping mandates for titling, mapping, and registration. In response to these issues, this technical note identifi

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Pasupuleti, Murali Krishna. Phase Transitions in High-Dimensional Learning: Understanding the Scaling Limits of Efficient Algorithms. National Education Services, 2025. https://doi.org/10.62311/nesx/rr1125.

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Abstract: High-dimensional learning models exhibit phase transitions, where small changes in model complexity, data size, or optimization dynamics lead to abrupt shifts in generalization, efficiency, and computational feasibility. Understanding these transitions is crucial for scaling modern machine learning algorithms and identifying critical thresholds in optimization and generalization performance. This research explores the role of high-dimensional probability, random matrix theory, and statistical physics in analyzing phase transitions in neural networks, kernel methods, and convex vs. no

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Giacometti, Alberto, Mari Wøien Meijer, and Hilma Salonen. Who drives green innovation in the Nordic Region? A change agency and systems perspective. Nordregio, 2024. http://dx.doi.org/10.6027/r2024:101403-2503.

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In addressing the critical challenge of systemic sustainability, this report explores the need for more than a one-size-fits-all approach in the Nordic Region. It investigates the role of change agency processes and the impact of policies and framework conditions on green transition changes in business sectors. Our two case studies reveal some of the bottlenecks and drivers of innovation and explore them from a systemic perspective and in different geographic scales, both from a place-based and place-less perspective. The methodology adopted in the report is comprehensive, including a deep div

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Leis, Sherry, and Lloyd Morrison. Plant community trends at Tallgrass Prairie National Preserve: 1998–2018. National Park Service, 2022. http://dx.doi.org/10.36967/2294512.

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The Heartland Inventory and Monitoring Network monitors plant communities at Tallgrass Prairie National Preserve and evaluates a variety of environmental variables that aﬀect vegetation patterns, including climate and ecological disturbances such as ﬁre and grazing. Here we report on 2002–2018 trends in management actions (ﬁre and grazing) and key plant community indicators. Temperature has increased over the past 50 years in the region. Precipitation and a standardized precipitation-evapotranspiration index included a high degree of interannual variability and did not demonstrate directional

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Aguiar Borges, Luciane, Lisa Rohrer, and Kjell Nilsson. Green and healthy Nordic cities: How to plan, design, and manage health-promoting urban green space. Nordregio, 2024. http://dx.doi.org/10.6027/r2024:11403-2503.

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This handbook is the culmination of the NORDGREEN project, which develops and implements smart planning and management solutions for well-designed, high-quality green spaces that promote health and well-being. Researchers and practitioners worked alongside one another in six Nordic cities: Aarhus (Denmark), Espoo and Ii (Finland), Stavanger (Norway), and Täby and Vilhelmina (Sweden). Together, the researchers and practitioners applied methods including GIS data analysis, statistical analysis, PPGIS surveys and analysis, policy document analysis, interviews, and evidence-based design models. Th

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Hunter, Fraser, and Martin Carruthers. Iron Age Scotland. Society for Antiquaries of Scotland, 2012. http://dx.doi.org/10.9750/scarf.09.2012.193.

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The main recommendations of the panel report can be summarised under five key headings:  Building blocks: The ultimate aim should be to build rich, detailed and testable narratives situated within a European context, and addressing phenomena from the longue durée to the short-term over international to local scales. Chronological control is essential to this and effective dating strategies are required to enable generation-level analysis. The ‘serendipity factor’ of archaeological work must be enhanced by recognising and getting the most out of information-rich sites as they appear. o There i

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State of School Feeding in Latin America and the Caribbean: 2022: Executive Summary. Inter-American Development Bank, 2023. http://dx.doi.org/10.18235/0005086.

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This joint publication by the Inter-American Development Bank (IDB) and the World Food Programme (WFP) presents the state of school feeding programmes in Latin America and the Caribbean (LAC) as of 2022. Amidst the challenges posed by the COVID-19 pandemic and compounding challenges, the publication highlights the critical role of school feeding programs for the region. The publication offers comprehensive insights into the state of school feeding in LAC: scale, coverage, components, and impacts. It emphasizes the need to reach vulnerable children to prevent dropouts and promote holistic devel

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