Gotowe bibliografie tematyczne / W-Curve Theory of Transition

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Gotowa bibliografia na temat „W-Curve Theory of Transition”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "W-Curve Theory of Transition"

Healey, J. J. "On the neutral curve of the flat-plate boundary layer: comparison between experiment, Orr–Sommerfeld theory and asymptotic theory." Journal of Fluid Mechanics 288 (April 10, 1995): 59–73. http://dx.doi.org/10.1017/s0022112095001066.

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The neutral stability curve for the flat-plate boundary layer has been calculated using the Orr–Sommerfeld equation and compared to those obtained using upper- and lower-branch scalings. The Orr–Sommerfeld results agree well with the lower-branch scaling at Reynolds numbers relevant to experiment, but agree well with the upper-branch scaling only for Rδ > 105. It is shown that the critical layer only emerges from the viscous wall layer when Rδ > 105. This suggests that for Rδ < 105, when the critical layer lies within the viscous wall layer, the disturbance has a triple-deck structure

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CHIMELI, ARIASTER B., and JOHN B. BRADEN. "A capital scarcity theory of the environmental Kuznets curve." Environment and Development Economics 14, no. 5 (2009): 541–64. http://dx.doi.org/10.1017/s1355770x08004981.

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ABSTRACTThis paper offers a theory of the environmental Kuznets curve (EKC) based on the scarcity of capital relative to environmental quality. In a unified treatment of both market and transition economies of the former Soviet Bloc, we characterize a dynamic economy subject to two sources of market failure: a pollution externality and a pure public good ‘environmental quality’. We derive a policy rule to implement the social optimum in market and transition economies and show how, in general, a pollution tax or tradable permits can only implement the social optimum if accompanied by other tax

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Umana, Anjalin, Mazumdar Abhijit, and Whiteside Erin. "Asian Students' Experience of Culture Shock and Coping Strategies." Journal of Education and Social Development 1, no. 1 (2017): 7–13. https://doi.org/10.5281/zenodo.834930.

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For international students, studying abroad has not been free from personal challenges. Not all students can adjust in an alien culture with ease. This research on Asian students’ experience of culture shock and coping strategies offers an understanding of the international students’ needs, adjustment difficulties, managing of anxiety and coping strategies. The research will be beneficial in generating ideas for better management of culture shock. In this study, Asian students of collectivist culture were recruited from the existing international student body of a university in the United Stat

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Lian, Peiqing, Taizhong Duan, Rui Xu, Linlin Li, and Meng Li. "Pressure behavior of shale-gas flow in dual porous medium based on fractal theory." Interpretation 6, no. 4 (2018): SN1—SN10. http://dx.doi.org/10.1190/int-2018-0002.1.

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The shale gas reservoir is a complex subject with a multiscale nanopore and fracture system, and the gas flow mechanism indicates an evident difference from the conventional gas reservoir. We have introduced fractal theory to characterize the multiscale distribution of pores and fractures, and we have developed a single-phase radial flow model considering nonequilibrium adsorption to describe the flow characteristics in the shale gas reservoir. The numerical solution of the flow model in Euclidean space is obtained by inversing the analytical solution derived in Laplace space through the Stehf

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Zhou, Zhuo, Jiu Hui Wu, Xiao Liang, Xiao Yang Yuan, and Yun Lei Wang. "Research and derivation for Wien’s displacement law by using catastrophe theory." Modern Physics Letters B 34, no. 28 (2020): 2050304. http://dx.doi.org/10.1142/s0217984920503042.

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In this paper, Wien’s displacement law as one of the most important laws of thermal radiation, for which Wien has won the Nobel Prize in Physics, is studied and derived from the perspective of phase transition by using catastrophe theory. This paper describes in detail how the control variable causes the phase transition of the system potential function and the main indexes for judging whether the phase transition occurs. By extending the control variable in the catastrophe theory affecting the thermal radiation into multi-parameters form, the function equilibrium curve of the blackbody radiat

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Rai, D. P., and R. K. Thapa. "A Theoretical Study of Bulk Tungsten (W) Based on Momentum Transfer (q-Dependent)." Advances in Optics 2014 (October 8, 2014): 1–9. http://dx.doi.org/10.1155/2014/814909.

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The ground state electronic properties of bulk (W) were studied within the density functional theory (DFT). We have also analyzed the momentum- (q-) dependent loss function, dielectric constant, and optical conductivity (OC) within TD-DFT random-phase approximation (RPA). The loss function is plotted in the energy range 0–55 eV. The energy loss function spectrum shows four prominent peaks, two lower peaks below along with two sharp peaks above 30 eV. The different nature of peaks depends on the momentum transfer q. The peak caused by interband transition showed a less pronounced dispersion. Fr

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Li, Lingchao, Jinlong Liu, Weina Sun, and Baodong Cheng. "Advances in forest transition theory research." Sustainable Forestry 4, no. 2 (2021): 29. http://dx.doi.org/10.24294/sf.v4i2.1608.

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Forest transition is a trend change process from decreasing to increasing forest area in a country or region. Since the 1990s, ecological and environmental problems such as climate change and loss of biodiversity have received constant attention. The research theory and method of forest transformation has gradually become the frontier and hot topic pursued by international academic circle. With forest transformation as the theme, on the basis of introducing the origin of forest transformation research, along the development vein and internal logic of forest transformation research, this paper

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Gu, Hanzhong, and Haruhisa Takahashi. "Exponential or Polynomial Learning Curves? Case-Based Studies." Neural Computation 12, no. 4 (2000): 795–809. http://dx.doi.org/10.1162/089976600300015592.

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Learning curves exhibit a diversity of behaviors such as phase transition. However, the understanding of learning curves is still extremely limited, and existing theories can give the impression that without empirical studies (e.g., cross validation), one can probably do nothing more than qualitative interpretations. In this note, we propose a theory of learning curves based on the idea of reducing learning problems to hypothesis-testing ones. This theory provides a simple approach that is potentially useful for predicting and interpreting (a diversity of) learning curve behaviors qualitativel

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Wang, Qihui, Kun Chen, Kejia Liu, Lianbo Wang, Yu Chu, and Bichen Xie. "Study on Characterization of Phase Transition in Continuous Cooling of Carbon Steel Using In Situ Thermovoltage Measurement." Coatings 14, no. 8 (2024): 980. http://dx.doi.org/10.3390/coatings14080980.

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In this paper, a self-designed and enhanced thermovoltage measuring device was built to capture thermovoltage curves of 45 steel during continuous cooling. The phase zones of the thermovoltage curve were interpreted based on the Engel–Brewer electron theory and Fe-Fe3C phase diagram. The results show that the curve was stratified into three homogeneous phase zones and two-phase transition zones as follows: Zone Ι: single-phase austenite (A) zone; Zone III: austenite and ferrite (A+F) homogeneous phase zone; Zone V: ferrite and pearlite (P+F) homogeneous phase zone; Zone II: austenite to ferrit

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Zawodna-Stephan, Marta. "Necrocommunitas. Badanie obozów koncentracyjnych w fazie przejściowej." Kultura i Społeczeństwo 63, no. 2 (2019): 39–59. http://dx.doi.org/10.35757/kis.2019.63.2.3.

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This text considers the question of how concentration camps in the transition phase can be studied. A transition phase appeared in certain camps a few months, weeks, or even days before the camp was liberated, and ended a few weeks later. As a result of the prisoners’ worsening living conditions, their high rate of mortality, and the weakening control of the camp staff , the social system that had been created in the camps fell apart and the new structures that would be established after liberation had not yet appeared. The author describes how certain concentration camps found themselves in a

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Rozprawy doktorskie na temat "W-Curve Theory of Transition"

Ochirkhuyag, Myagmersuren. "Water Management in Mongolia." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-160459.

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The world experiences large-scale ecosystems degradation in an every part of the planet - in rich as well as in and poor parts. Unstable economic conditions together with weak law enforcements make low income countries face more severe forms of natural destruction. This draws the attention on the need to design economic policies that are environmentally sound and while at the same time ensuring the well-being of their inhabitants in economic, social and natural settings. A number of countries in Central and Eastern Europe and Central Asia have experienced a unique historical period of transiti

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Sheffield, Carolyn Evans. "Time-Resolved Infrared Spectroscopy and Density Functional Theory Study of Weak Interactions of Metal Carbonyls and Organic Solvents." Diss., CLICK HERE for online access, 2010. http://contentdm.lib.byu.edu/ETD/image/etd3389.pdf.

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Manning, Adrian Gordon. "Quantum Fields in Curved Spacetime with Cosmological and Gravitational Wave Implications." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/17804.

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A range of novel ideas, covering both general relativity and quantum field theory are introduced and explored. An analytic procedure for theories that modify the stress-energy-tensor in general relativity is examined which compares predicted deviations in the gravitational wave radiation from binary black hole mergers to the observed waveform from recent detections, i.e GW150914. This is applied directly to the theory of non-commutative spacetimes, which ultimately constrains the scale of non-commutative spacetime up to the Planck scale, some 15 orders of magnitude improvement on previous boun

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Hess, Christoph. "Propriétés de transport des bronzes oxygénés quasi-bidimensionnels à ondes de densité de charge, (PO2)4(WO3)2m(m=4 à 14)." Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10117.

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Nous avons etudie les proprietes de transport des bronzes quasi-bidimensionnels (po#2)#4(wo#3)#2#m (m=4 a 14). Ces composes subissent des transitions de peierls vers un etat a onde de densite de charge (odc) constituee d'une modulation de la densite electronique couplee a une distorsion periodique du reseau. Le parametre m est associe a l'epaisseur des feuillets conducteurs wo#6. Avec un nombre d'electrons de conduction constant par maille primitive, on peut etudier l'influence de la variation de la densite electronique et du caractere bidimensionnel sur les instabilites de peierls. Les mesure

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Caissie, Denis. "Paths towards self-discovery: transitional objects and intersubjectivity in four late-twentieth-century British novels." Thesis, Department of English, University of New Brunswick, 2003. http://hdl.handle.net/1882/47.

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This thesis explores the psychological development of liminal characters in four late-twentieth-century British novels. Studies of Julian Barnes’s Flaubert's Parrot, A. S. Byatt’s Possession, Angela Carter’s Nights at the Circus, and John Fowles’s The French Lieutenant’s Woman, by using D. W. Winnicott’s transitional-objects theory and Jessica Benjamin’s intersubjective theory, show how characters who are little more than infants socially and psychologically attempt to transcend the transitional, liminal status defined by Victor Turner. With the aid of significant objects or equal other subjec

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Vassura, Edoardo. "Path integrals on curved space and the worldline formalism." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13448/.

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Lo scopo primario di questa tesi e' l’analisi di una nuova procedura di regolarizzazione di path integral su spazi curvi, presentata inizialmente dal fisico J. Guven e applicata al caso di una teoria di campo scalare , ma mai utilizzata per svolgere ulteriori calcoli espliciti. Questa procedura, se corretta, permetterebbe di utilizzare il formalismo di path integral su spazi piatti anche nel caso in cui la varieta' di background risulti localmente curva. Tale procedura trasforma di fatto un modello sigma non lineare in un modello efficace lineare, permettando pertanto di aggirare le usuali com

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Ayed, Othman. "Etude des interactions entre atomes alcalins (li, na, k) et monoxyde de carbone en matrices de gaz rares : analyse en spectroscopie vibrationnelle et calcul quantiques de quelques complexes." Paris 6, 1987. http://www.theses.fr/1987PA066117.

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Dans le cas de li(le plus reactif), identification de li(co)::(n), ou n = 1,2,3,4,(ou 6), avec des frequences de vibration de valence de co plus perturbees que pour les metaux de transition carbonyle,et de li::(m) co, ou m = 2,3, avec frequences nu (co) abaissees. Pour na et k, observation d'especes de haute stoechiometrie (c::(n)o::(n))**(2-) (m**(+))::(2) ou n = 2,3,4, formees apres irradiation uv-visible et correspondant a des transformations chimiques. Essai d'interpretation de ces differences de reactivite par une description quantique des agregats de plus basse stoechiometrie : dans le c

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Rust, Maxim. "Procesy reprodukcji i cyrkulacji białoruskich i ukraińskich elit politycznych w latach 1991 - 2016." Doctoral thesis, 2019. https://depotuw.ceon.pl/handle/item/3354.

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Zakres pracy obejmuję proces ewolucji białoruskich i ukraińskich elit politycznych w okresie 1991-2016. Przedmiotem pracy są współczesne elity polityczne Białorusi i Ukrainy. Elity polityczne są opisane i porównane głównie na dwóch płaszczyznach: elity władzy (albo elity rządzące) oraz kontrelity. Problemem badawczym jest porównanie współczesnych białoruskich i ukraińskich elit politycznych pod względem ich pochodzenia, wewnętrznej struktury i zachodzących w nich procesów. Głównym celem rozprawy jest kompleksowy opis białoruskich i ukraińskich elit politycznych – skąd się wywodzą, jaka jest i

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McArthur, Ian Albert. "Minimum entropy techniques for determining the period of W UMA stars." Diss., 2014. http://hdl.handle.net/10500/19898.

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This MSc report discusses the attributes of W Ursae Majoris (W UMa) stars and an investigation into the Minimum Entropy (ME) method, a digital technique applied to the determination of their periods of variability. A Python code programme was written to apply the ME method to photometric data collected on W UMa stars by the All Sky Automated Survey (ASAS). Starting with the orbital period of the binaries estimated by ASAS, this programme systematically searches around this period for the period which corresponds to the lowest value of entropy. Low entropy here means low scatter (or spread) of

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Zdybel, Piotr Dariusz. "Kwantowe przemiany fazowe w spolaryzowanych mieszaninach ultrazimnych atomów fermionowych o nierównych masach." Doctoral thesis, 2022. https://depotuw.ceon.pl/handle/item/4104.

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This dissertation aims to investigate quantum phase transitions in polarized mixtures of ultracold fermionic atoms with unequal masses. In such systems, a leading instability of the Fermi sea is related to Cooper pairing in the s-wave channel. We will focus on the phase transition at the onset of the uniform super uid phase. Imbalanced Fermi mixtures possess a wide choice of control parameters, which allow tuning its properties. In particular, they provide a way to modify the characteristics of the phase transition at T = 0. In this thesis, we approach the problem of quantum phase transitions

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Książki na temat "W-Curve Theory of Transition"

Perkins, Lee. Railroad Taper: The Theory and Application of a Compound Transition Curve Based upon Thirty-Foot Chords. Creative Media Partners, LLC, 2018.

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Railroad Taper: The Theory and Application of a Compound Transition Curve Based upon Thirty-Foot Chords. Creative Media Partners, LLC, 2022.

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Searles, William Henry. Railroad Spiral: The Theory of Compound Transition Curve Reduced to Practical Formulae and Rules for Application in Field Work. Creative Media Partners, LLC, 2018.

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Searles, William Henry. Railroad Spiral: The Theory of the Compound Transition Curve Reduced to Practical Formulæ and Rules for Application in Field Work. Creative Media Partners, LLC, 2018.

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Desperak, Izabela. Płeć zmiany. Zjawisko transformacji w Polsce z perspektywy gender. Wydawnictwo Uniwersytetu Łódzkiego, 2013. http://dx.doi.org/10.18778/7525-943-8.

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Study focuses on the issue of social change, based on transition process in Poland, analysed through gender perspective. Although many books and reports on both transition and women’s social position have been conducted and published before, studies joining those two perspectives were rare. The analysis bases on contemporary sociological theories of social change, concerning gender: Manuel Castells’s idea of the end of patriarchy, Ronald Inglehart and Pippa Norris concept of rising tide of gender equality and cultural change, theory of new gender contract formulated by Małgorzata Fuszara and A

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Grolnick, Simon, and Leonard Barking. Between Reality and Fantasy: Transitional Objects and Phenomena. Jason Aronson, 1988.

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Caldwell, Lesley, and Helen Taylor Robinson, eds. The Collected Works of D. W. Winnicott. Oxford University Press, 2016. http://dx.doi.org/10.1093/med:psych/9780190271367.001.0001.

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Volume 4 (1952–1955) is introduced by the distinguished Canadian analyst, Dominique Scarfone. It contains texts of further BBC broadcasts and papers on Winnicott’s contribution to the psychoanalytic study of psychosis and the meaning of regression in analysis. There are letters to members of the British Society and reviews of contemporary books, including a review, with Masud Khan, of Ronald Fairbairn’s Psychoanalytic Studies of the Personality. This volume contains the first published version of ‘Transitional Objects and Transitional Phenomena’ and the whole case history Holding and Interpret

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Cox, Tory, Terence Fitzgerald, and Michelle Alvarez, eds. The Art of Becoming Indispensable. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197585160.001.0001.

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Despite their academic preparation and lived experiences, new school social workers face a learning curve when moving from entry-level practice to proficiency. The Art of Being Indispensable: What School Social Workers Need to Know in Their First Three Years of Practice is the first book focusing specifically on the needs of new school social workers as they transition to this complex role. Each of the book’s 20 chapters features an academic scholar and at least one school social work practitioner; overall, there are 18 academics and 42 practitioners from 28 different states. The diversity of

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Caldwell, Lesley, and Helen Taylor Robinson, eds. The Collected Works of D. W. Winnicott. Oxford University Press, 2016. http://dx.doi.org/10.1093/med:psych/9780190271411.001.0001.

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Volume 9, 1969–1971, introduced by the Swedish training analyst and former president of the Swedish Society, Arne Jemstedt, contains a selection of letters from the last years of Winnicott’s life. The work includes further developments of his work on envy, the use of an object, psychosomatics, the impact of the mother’s unconscious, living creatively, communication, adolescence and rebellion and the final version of transitional objects and transitional phenomena. There are also topical pieces on the moon landing, the contraceptive pill and the building of the Berlin Wall. The volume includes

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Maggiore, Michele. Gravitational Waves. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198570899.001.0001.

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A comprehensive and detailed account of the physics of gravitational waves and their role in astrophysics and cosmology. The part on astrophysical sources of gravitational waves includes chapters on GWs from supernovae, neutron stars (neutron star normal modes, CFS instability, r-modes), black-hole perturbation theory (Regge-Wheeler and Zerilli equations, Teukoslky equation for rotating BHs, quasi-normal modes) coalescing compact binaries (effective one-body formalism, numerical relativity), discovery of gravitational waves at the advanced LIGO interferometers (discoveries of GW150914, GW15122

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Części książek na temat "W-Curve Theory of Transition"

Popov, Valentin L. "Adhesion Hysteresis Due to Chemical Heterogeneity." In Springer Tracts in Mechanical Engineering. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60124-9_20.

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AbstractAccording the JKR theory of adhesivecontact, changes of the contact configuration after formation of the adhesive neck and before detaching are completely reversible. This means, that after formation of the initial contact, the force-distance dependencies should coincide, independently of the direction of the process (indentation or pull-off). In the majority of real systems, this invariance is not observed. The reasons for this may be either plastic deformation in the contacting bodies or surface roughness. One further mechanism of irreversibility (and corresponding energy dissipation

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Hornkohl, Aaron D. "The Origins of Wayyiqṭol." In Interconnected Traditions: Semitic Languages, Literatures, Cultures—A Festschrift for Geoffrey Khan. Open Book Publishers, 2025. https://doi.org/10.11647/obp.0463.02.

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In this study, the writer explores Geoffrey Khan’s groundbreaking theory on the developmental history of the Biblical Hebrew wayyiqṭol form. After summarising earlier research on phonological and transcriptional evidence, the article details Khan’s claim, based on typological parallels from Amarna Canaanite and Neo-Aramaic and using Construction Grammar, that wayyiqṭol developed (by means of schematisation and secondary gemination to distinguish preterite semantics from volitional or purposive meanings) from a semantically undifferentiated Iron Age w-yiqṭol construction into a specialised f

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Celletti, Alessandra, Gabriella Della Penna, and Claude Froeschlé. "Estimate of the Transition Value of Librational Invariant Curves." In Modern Celestial Mechanics: From Theory to Applications. Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-017-2304-6_16.

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Ying, S. C., and G. Y. Hu. "Theory of Commensurate-Incommensurate Phase Transitions in W(001)." In The Structure of Surfaces. Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-82493-7_55.

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Sato, Yasuomi D., Keiji Okumura, and Masatoshi Shiino. "Model Studies on Time-Scaled Phase Response Curves and Synchronization Transition." In Neural Information Processing. Theory and Algorithms. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-17537-4_12.

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Ossola, Alessandro, and Brenda Lin. "Accelerating Climate Innovation in Cities." In Theory and Practice of Urban Sustainability Transitions. Springer Nature Singapore, 2024. https://doi.org/10.1007/978-981-97-7671-9_4.

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AbstractThe rate at which climate action is currently achieved is often outpaced by the increasing speed of climate impacts in many urbanised regions globally. Actions related to coping with climate extremes, improving adaptive responses, and ultimately transforming cities for climate resilience have had variable success and have often failed to be implemented at scale. Climate stresses and impacts are accelerating; current climate action is not, at least not fast enough.Here we propose a novel conceptual framework based on the concept of ‘climate innovation’: the pervasive, strategic applicat

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Sahu, D., S. C. Ying, and J. M. Kosterlitz. "Theory of Phase Transitions on H/W(110) and H/Mo(110) Systems." In Springer Series in Surface Sciences. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73343-7_77.

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Moriarty, John A. "High-Temperature Properties, Melting and Phase Diagrams." In Theory and Application of Quantum-Based Interatomic Potentials in Metals and Alloys. Oxford University PressOxford, 2023. http://dx.doi.org/10.1093/oso/9780198822172.003.0008.

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Abstract In this chapter, the treatment of thermodynamic properties, phase stability and phase transitions in metals via quantum-based interatomic potentials (QBIPs) is extended to high temperature (high T), including anharmonic vibrational effects in the solid, liquid-state structure and energetics and pressure-temperature phase diagrams. In addition to standard molecular dynamics (MD) techniques, the tools of reversible-scaling MD and variational perturbation theory are introduced to obtain accurate solid and liquid free energies. Respective pair and multi-ion QBIPs from generalized pseudopo

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Kübler, Jürgen. "Electronic Structure and Magnetism." In Theory of Itinerant Electron Magnetism, 2nd Edition. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780192895639.003.0004.

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The fundamental magnetic properties of iron, cobalt, and nickel are the center of interest, beginning with historical attempts and Stoner’s theory. Stoner susceptibility is derived in a modern way by Janak finding that only those three carry a magnetic moment in elementary metals. The energy-band structures of all transition elements are connected with their repective phase stability which is obtained by means of density-functional calculations. The band structure of the ferromagnetic metals is obtained and compared with angle-resolved photoemission data. The electronic structure of the antife

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Kia, Amir. "Positive Interest Rate, Stationary Economy, and Inefficiency." In Handbook of Research on Theory and Practice of Global Islamic Finance. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-0218-1.ch001.

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This chapter analyses the direct impact of a positive rate of interest (usury) on the production possibility curve. Usury under a stationary state creates inefficiency in the sense that the marginal rate of transformation is not equal to the price ratio. Over the short run Pareto efficiency appears when a transition period is considered and the rate of return moving from one state to another is endogenous and equals the rate of investment. In a non-stationary economy, when a positive rate of return (interest) is equal to the growth rate of the economy, there will be a Pareto-efficient equilibr

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Streszczenia konferencji na temat "W-Curve Theory of Transition"

McDonald, Molly A., and Christos T. Maravelias. "Stochastic Programming Models for Long-Term Energy Transition Planning." In Foundations of Computer-Aided Process Design. PSE Press, 2024. http://dx.doi.org/10.69997/sct.107593.

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With growing concern over the effects of green-house gas emissions, there has been an increase in emission-reducing policies by governments around the world, with over 70 countries having set net-zero emission goals by 2050-2060. These are ambitious goals that will require large investments into the expansion of renewable and low-carbon technologies. The decisions about which technologies should be invested in can be difficult to make since they are based on information about the future, which is uncertain. When considering emerging technologies, a source of uncertainty to consider is how the

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Wang, Z. X., H. M. Li, Y. J. Chao, and P. S. Lam. "Prediction of Characteristic Length and Fracture Toughness in Ductile-Brittle Transition." In ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61608.

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Finite element method was used to analyze the three-point bend experimental data of A533B-1 pressure vessel steel obtained by Sherry, Lidbury, and Beardsmore [1] from −160 to −45 °C within the ductile-brittle transition regime. As many researchers have shown, the failure stress (σf) of the material could be approximated as a constant. The characteristic length, or the critical distance (rc) from the crack tip, at which σf is reached, is shown to be temperature dependent based on the crack tip stress field calculated by the finite element method. With the J-A2 two-parameter constraint theory in

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Cicero, Sergio, Tiberio Garcia, and Virginia Madrazo. "On the Use of the Notch Master Curve for Apparent Fracture Toughness Predictions of Notched Ferritic Steels Operating Within the Ductile-to-Brittle Transition Zone." In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45043.

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This paper presents the Notch-Master Curve as a model for the prediction of the apparent fracture toughness of ferritic steels in notched conditions and operating at temperatures corresponding to their ductile-to-brittle transition zone. The Notch-Master Curve combines the Master Curve of the material in cracked conditions and the notch corrections provided by the Theory of Critical Distances. In order to validate the model, the fracture resistance results obtained in fracture tests performed on notched CT and SENB specimens are presented. The results gathered here cover four ferritic steels (

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Shirinyan, Aram, Yuriy Bilogorodskyy, and Oleksiy Krit. "Simulating the vacancy saturation effect on phase changes in irradiated nanoparticles using the steady-state approach in chemical rate theory." In IXth INTERNATIONAL SAMSONOV CONFERENCE “MATERIALS SCIENCE OF REFRACTORY COMPOUNDS”. Frantsevich Ukrainian Materials Research Society, 2024. http://dx.doi.org/10.62564/m4-as2232.

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The objective of the research is to propose a thermodynamic approach to describe the effects of vacancy saturation on the phase stability of solid nanoparticles during irradiation and to employ the steady-state approach in chemical rate theory to account for radiation defect concentrations. The research is applicable for polymorphic phase transitions in metals (Mo, V, W, Ti, Tl, Zr) and amorphization in ceramics (SiC, TiC). The study demonstrates, via simulation, the potential for radiation-induced α-phase to β-phase transitions and stable radiation zones in initially crystalline nanoparticles

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Cicero, Sergio, Tiberio García, Virginia Madrazo, Jorge Cuervo, Estela Ruiz, and Federico Gutiérrez-Solana. "Analysing the Notch Effect Within the Ductile-to-Brittle Transition Zone of S275JR Steel." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97017.

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This paper analyses the notch effect in ferritic-pearlitic steel S275JR in a range of temperatures within the material Ductile-to-Brittle Transition Zone (DBTZ). The notch effect is evaluated in terms of load-bearing capacity, apparent fracture toughness (modeled here using the Theory of Critical Distances) and fracture micromechanisms. The concept of Master Curve in notched conditions is also presented. To this end, experimental results obtained in S275JR notched specimens are presented, together with Scanning Electron Microscopy (SEM) fractographies. The analysis is performed at −50 °C, −30

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Sánchez, Marcos, Sergio Cicero, Florian Obermeier, Marta Serrano, Yu-Lung Chiu, and Eberhard Altstadt. "On the Possibility of Extending the Crack Length Criterion in the Master Curve Methodology." In ASME 2024 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2024. http://dx.doi.org/10.1115/pvp2024-122502.

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Abstract The master curve methodology is a well-known approach utilized to characterize the ductile-to-brittle transition region of ferritic-pearlitic steels. This methodology was initially standardized in ASTM E1921 in 1997 and has undergone continuous evolution and improvement since its origin. However, the validity criterion for the crack aspect ratio (0.45 ≤ a0/W ≤ 0.55) has remained unchanged since its inception. It is worth noting that this criterion was originally established in accordance with standard ASTM E399, which characterizes fracture conditions under linear-elastic plane strain

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Al Barwani, Mohsin, and Jae Sung Park. "Dynamics of Laminar-to-Turbulent Transition in a Wall-Bounded Channel Flow Up to Re=40,000." In ASME 2022 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/imece2022-94489.

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Abstract The transition from laminar to turbulent flow is of great interest since it is one of the most difficult and unsolved problems in fluids engineering. The transition processes are significantly important because the transition has a huge impact on almost all systems that come in contact with a fluid flow by altering the mixing, transport, and drag properties of fluids even in simple pipe and channel flows. Generally, in most transportation systems, the transition to turbulence causes a significant increase in drag force, energy consumption, and, therefore, operating cost. Thus, underst

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Lawandy, Nabil M. "Light-induced transport and delocalization in transparent materials." In OSA Annual Meeting. Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.tuii4.

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When an intense nonresonant field interacts with a two-level system, the wavefunctions are modified. Several approaches may be used to study this problem including the techniques of dressed state theory. When the two-level system is comprised of two midgap sites separated by a distance Rab and an energy in the absence of light shifts Wba, the light shifted energy separation becomes This effect acts on level pairs and therefore shifts all the energy levels closer to each other. With these results and the rough criteria for Anderson localization W > B (B is the energy bandwidth), we may arriv

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Refan, Maryam, and Horia Hangan. "Experimental and Theoretical Study on the Aerodynamic Performance of a Small Horizontal Axis Wind Turbine." In ASME 2010 Power Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/power2010-27174.

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An upwind, three-bladed small horizontal axis wind turbine (HAWT) with a rotor of 2.2 m in diameter is tested in the Boundary Layer Wind Tunnel Laboratory II (BLWTL II). The power output of the turbine is measured for free stream velocities ranging from 1 m/s to 9 m/s. The blade element momentum (BEM) theory is implemented to predict the power curve of the HAWT. The theoretical characteristics of the turbine are discussed in terms of power and torque coefficients and the experimental results are compared to the numerical (BEM) estimation. Moreover, a force balance test is carried out on a sing

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Kim, Young Dae, and Daniel De Kee. "Electrorheological Fluid Hysteresis." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-82355.

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Electrorheological (ER) fluids are suspensions of polarizable particles dispersed in insulating liquids. They exhibit a rapid and reversible transition from a liquid-like to a solid-like state upon the application of an electric field. The observed shear stress - shear rate hysteresis makes the precise control of the ER mechanical devices very difficult. Hysteresis behavior of TiO2 ER fluids were observed by varying particle concentration, electric field strength, maximum shear rate, and the time of hysteresis loop. In the absence of an electric field, the stress level of the up curve exceeds

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Raporty organizacyjne na temat "W-Curve Theory of Transition"

Wilkowski, G. M., D. Rudland, P. Mincer, B. Metrovich, and D. Rider. ASME-PVP05 Brittle-to-Ductile Fracture Initiation Transition Temperature for Old Linepipe w Surface-Crack. Pipeline Research Council International, Inc. (PRCI), 2005. http://dx.doi.org/10.55274/r0011772.

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Much work has been done to assess constraint effects on the crack-driving force for specimens and cracks in pipes. The material's transition temperature where the fracture process changes from ductile tearing to cleavage fracture at crack initiation is affected by the constraint conditions but is a material property that cannot be determined analytically. This paper presents a methodology to account for constraint effects to predict the lowest temperature where ductile fracture initiation occurs and relates that temperature back to Charpy impact data for X60 and lower grades, particularly for

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Tiku, Pussegoda, and Luffman. L52031 In-Situ Pipeline Mechanical Property Characterization. Pipeline Research Council International, Inc. (PRCI), 2003. http://dx.doi.org/10.55274/r0011133.

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The focus in the present study was to establish whether there is a reasonable correlation between the Charpy Vee Notch (CVN) toughness and the non-destructive Potential Difference (PD) measurements of ferritic-pearlitic steels having a range of CVN toughness values. Complete material characterization was carried out for six steels procured for this program. The characterization included chemical analysis, microstructural information, tensile properties and CVN transition curves. In addition, most of the data including the CVN transition curves were available for five suitable pipe line steels

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Asenath-Smith, Emily, Emma Ambrogi, Lee Moores, Stephen Newman, and Jonathon Brame. Leveraging chemical actinometry and optical radiometry to reduce uncertainty in photochemical research. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/42080.

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Subtle aspects of illumination sources and their characterization methods can introduce significant uncertainty into the data gathered from light-activated experiments, limiting their reproducibility and technology transition. Degradation kinetics of methyl orange (MO) and carbamazepine (CM) under illumination with TiO₂ were used as a case study for investigating the role of incident photon flux on photocatalytic degradation rates. Valerophenone and ferrioxalate actinometry were paired with optical radiometry in three different illumination systems: xenon arc (XE), tungsten halogen (W-H), and

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Wagner, D. Ry, Eliezer Lifschitz, and Steve A. Kay. Molecular Genetic Analysis of Flowering in Arabidopsis and Tomato. United States Department of Agriculture, 2002. http://dx.doi.org/10.32747/2002.7585198.bard.

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The primary objectives for the US lab included: the characterization of ELF3 transcription and translation; the creation and characterization of various transgenic lines that misexpress ELF3; defining genetic pathways related to ELF3 function regulating floral initiation in Arabidopsis; and the identification of genes that either interact with or are regulated by ELF3. Light quality, photoperiod, and temperature often act as important and, for some species, essential environmental cues for the initiation of flowering. However, there is relatively little information on the molecular mechanisms

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