scholarly journals Uniformly Frustrated XY Model: Strengthening of the Vortex Lattice by Intrinsic Disorder

2021 ◽  
Vol 6 (4) ◽  
pp. 42
Author(s):  
Ilaria Maccari ◽  
Lara Benfatto ◽  
Claudio Castellani

In superconducting films, the role of intrinsic disorder is typically to compete with superconductivity by fragmenting the global phase coherence and lowering the superfluid density. Nonetheless, when a transverse magnetic field is applied to the system and an Abrikosov vortex lattice form, the presence of disorder can actually strengthen the superconducting state against thermal fluctuations. By means of Monte Carlo simulations on the uniformly frustrated XY model in two dimensions, we show that while for weak pinning the superconducting critical temperature Tc increases with the applied field H, for strong enough pinning, the experimental decreasing dependence between Tc and H is recovered with a resulting more robust vortex lattice.

Author(s):  
Donatella della Porta ◽  
Massimiliano Andretta ◽  
Tiago Fernandes ◽  
Eduardo Romanos ◽  
Markos Vogiatzoglou

The second chapter covers the main characteristics of transition time in the four countries: Italy, Greece, Spain, and Portugal. After developing the theoretical model on paths of transition, with a focus on social movement participation, the chapter looks at social movements and protest events as turning points during transition, covering in particular the specific movement actors, their organizational models, and their repertoires of action and frames. The chapter focuses on two dimensions: the role of mobilization in the transition period, which implies the analysis of how elites and masses interact, ally, or fight with each other in the process, and the outcome of transitions as continuity versus rupture of the democratic regime vis-à-vis the old one. It concludes by elaborating some hypotheses on how different modes of transition may produce different types and uses of (transition) memories.


2021 ◽  
Vol 103 (3) ◽  
Author(s):  
Moupriya Das ◽  
Holger Kantz
Keyword(s):  

Religions ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 613
Author(s):  
Christopher Tollefsen

Critics of the “New” Natural Law (NNL) theory have raised questions about the role of the divine in that theory. This paper considers that role in regard to its account of human rights: can the NNL account of human rights be sustained without a more or less explicit advertence to “the question of God’s existence or nature or will”? It might seem that Finnis’s “elaborate sketch” includes a full theory of human rights even prior to the introduction of his reflections on the divine in the concluding chapter of Natural Law and Natural Rights. But in this essay, I argue that an adequate account of human rights cannot, in fact, be sustained without some role for God’s creative activity in two dimensions, the ontological and the motivational. These dimensions must be distinguished from the epistemological dimension of human rights, that is, the question of whether epistemological access to truths about human rights is possible without reference to God’s existence, nature, or will. The NNL view is that such access is possible. However, I will argue, the epistemological cannot be entirely cabined off from the relevant ontological and motivational issues and the NNL framework can accommodate this fact without difficulty.


2002 ◽  
Vol 40 (1) ◽  
pp. 89-94 ◽  
Author(s):  
Stefanie E. Naumann ◽  
Barbara D. Minsky ◽  
Michael C. Sturman

There has been much debate about people’s perceptions of entitlement. We trace the history of the different uses of entitlement perceptions across fields in order to develop a typology that identifies two dimensions: level of entitlement and degree of reciprocity. We conclude that a historical, cross‐disciplinary examination of the construct of employee entitlement will improve our understanding of the role of entitlement perceptions in the workplace. Specifically, we suggest that each of the four combinations of the entitlement and reciprocity dimensions points to a different employee‐organization relationship and, thus, requires a different motivational tool.


2007 ◽  
Author(s):  
David P. Wilson ◽  
Todd Lillian ◽  
Sachin Goyal ◽  
Alexei V. Tkachenko ◽  
Noel C. Perkins ◽  
...  

2021 ◽  
Vol 64 (22) ◽  
pp. 5-14
Author(s):  
Herdian Herdian ◽  
Fatin Wahidah ◽  
Totok Haryanto

Introduction: As long as the world is still in a pandemic, an individual must maintain his mental health to deal with problems or impacts arising from a pandemic situation. The growth mindset is believed to be a predictor in influencing a person's mental health. We tested how the growth mindset influences on positive mental health in college students during a pandemic. Method: A total of 567 students from universities in Indonesia randomly completed an online questionnaire. The data collection tool uses Positive mental Health and Implicit Theory Measures scale on two dimensions of growth mindset: intelligence mindset and moral mindset. Results: The results show that the intelligence mindset affects positive mental Health, the moral mindset as well. In addition, the two variables together, intelligence mindset and moral mindset, affect positive mental health. Conclusions: The three hypotheses proposed can be accepted statistically, but the magnitude of the influence of each hypothesis is very small. The implications and research suggestions are discussed in depth in the discussion.


2018 ◽  
Vol 32 (25) ◽  
pp. 1850281 ◽  
Author(s):  
Qingmiao Nie ◽  
Haibin Li

Nonequilibrium phase transitions of vortex matter with a strong random pinning potential in layered superconductors are investigated by the three-dimensional frustrated anisotropic XY model and resistively-shunted junction dynamics at low, middle and high-temperatures, respectively. It is found that a disorder to order phase transition driven by an external current can be obtained at a low-temperature, however, a reordering configuration does not occur at a high-temperature. With the competition between thermal noise, disorder pins and current, the vortex matter can even show the reordering process twice at an intermediate temperature, giving a clear evidence of dc driven vortex lattice reorganization.


PROTEOMICS ◽  
2018 ◽  
Vol 18 (21-22) ◽  
pp. 1800067 ◽  
Author(s):  
Brett Janis ◽  
Clinton Belott ◽  
Michael A. Menze

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