scholarly journals The State of Matter in Simulations of Core-Collapse supernovae—Reflections and Recent Developments

2017 ◽  
Vol 34 ◽  
Author(s):  
Tobias Fischer ◽  
Niels-Uwe Bastian ◽  
David Blaschke ◽  
Mateusz Cierniak ◽  
Matthias Hempel ◽  
...  
Keyword(s):  
Equation Of State ◽  
Degrees Of Freedom ◽  
The State ◽  
Core Collapse ◽  
Heavy Nuclei ◽  
Isospin Asymmetry ◽  
Wide Range ◽  
Recent Developments ◽  
State Of Matter

AbstractIn this review article, we discuss selected developments regarding the role of the equation of state in simulations of core-collapse supernovae. There are no first-principle calculations of the state of matter under supernova conditions since a wide range of conditions is covered, in terms of density, temperature, and isospin asymmetry. Instead, model equation of state are commonly employed in supernova studies. These can be divided into regimes with intrinsically different degrees of freedom: heavy nuclei at low temperatures, inhomogeneous nuclear matter where light and heavy nuclei coexist together with unbound nucleons, and the transition to homogeneous matter at high densities and temperatures. In this article, we discuss each of these phases with particular view on their role in supernova simulations.

scholarly journals Securitisation gaps: Towards ideational understandings of state weakness

2021 ◽  
pp. 1-20
Author(s):  
Kevork Oskanian
Keyword(s):  
The State ◽  
Collective Knowledge ◽  
State Action ◽  
Role Of The State ◽  
Wide Range ◽  
State And Society ◽  
Interpretive Approach ◽  
Recent Developments ◽  
The Republic

Abstract This article contributes a securitisation-based, interpretive approach to state weakness. The long-dominant positivist approaches to the phenomenon have been extensively criticised for a wide range of deficiencies. Responding to Lemay-Hébert's suggestion of a ‘Durkheimian’, ideational-interpretive approach as a possible alternative, I base my conceptualisation on Migdal's view of state weakness as emerging from a ‘state-in-society's’ contested ‘strategies of survival’. I argue that several recent developments in Securitisation Theory enable it to capture this contested ‘collective knowledge’ on the state: a move away from state-centrism, the development of a contextualised ‘sociological’ version, linkages made between securitisation and legitimacy, and the acknowledgment of ‘securitisations’ as a contested Bourdieusian field. I introduce the concept of ‘securitisation gaps’ – divergences in the security discourses and practices of state and society – as a concept aimed at capturing this contested role of the state, operationalised along two logics (reactive/substitutive) – depending on whether they emerge from securitisations of the state action or inaction – and three intensities (latent, manifest, and violent), depending on the extent to which they involve challenges to state authority. The approach is briefly illustrated through the changing securitisation gaps in the Republic of Lebanon during the 2019–20 ‘October Uprising’.

scholarly journals A Superfluid Perspective on Neutron Star Dynamics

Universe ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 17
Author(s):  
Nils Andersson
Keyword(s):  
Neutron Star ◽  
Degrees Of Freedom ◽  
Temperature Scale ◽  
Fluid System ◽  
Fluid Core ◽  
State Of Matter ◽  
Entrainment Effect ◽  
Neutron Component ◽  
The Impact

As mature neutron stars are cold (on the relevant temperature scale), one has to carefully consider the state of matter in their interior. The outer kilometre or so is expected to freeze to form an elastic crust of increasingly neutron-rich nuclei, coexisting with a superfluid neutron component, while the star’s fluid core contains a mixed superfluid/superconductor. The dynamics of the star depend heavily on the parameters associated with the different phases. The presence of superfluidity brings new degrees of freedom—in essence we are dealing with a complex multi-fluid system—and additional features: bulk rotation is supported by a dense array of quantised vortices, which introduce dissipation via mutual friction, and the motion of the superfluid is affected by the so-called entrainment effect. This brief survey provides an introduction to—along with a commentary on our current understanding of—these dynamical aspects, paying particular attention to the role of entrainment, and outlines the impact of superfluidity on neutron-star seismology.

Recent Advancement of Pyrazole Scaffold Based Neuroprotective Agents: A Review

2021 ◽  
Vol 20 ◽  
Author(s):  
Subham Das ◽  
Saleem Akbar ◽  
Bahar Ahmed ◽  
Rikeshwar Prasad Dewangan ◽  
Mohammad Kashif Iqubal ◽  
...  
Keyword(s):  
Biological Activities ◽  
Neuroprotective Agents ◽  
Wide Range ◽  
Recent Developments ◽  
Ic50 Values ◽  
Structural Activity Relationship ◽  
Pharmaceutical Industries ◽  
Neurological Conditions ◽  
Nitrogen Containing Compounds

: As a source of therapeutic agents, heterocyclic nitrogen-containing compounds and their derivatives are still interesting and essential. Pyrazole, a five-member heteroaromatic ring with two nitrogen atoms, has a major impact on chemical industries as well as pharmaceutical industries. Due to its wide range of biological activities against various diseases, it has been identified as a biologically important heterocyclic scaffold. The treatment of neurological disorders has always been a difficult task. Therefore, identifying therapeutically effective molecules for neurological conditions remains an open challenge in biomedical research and development. For developing novel entities as neuroprotective agents, recently, pyrazole scaffold has attracted medicinal chemists worldwide. The major focus of research in this area is to discover novel molecules as neuroprotective agents with minimal adverse effects and better effectiveness in improving the neurological condition. This review mainly covers recent developments in the neuropharmacological role of pyrazole incorporated compounds, including their structural-activity relationship (SAR), which also further includes IC50 values (in mM as well as in μM), recent patents, and a brief history as neuroprotective agents.

scholarly journals Strategizing the for-profit city: The state, developers, and urban production in Mega Manila

2019 ◽  
Vol 52 (2) ◽  
pp. 403-422 ◽  
Author(s):  
Morgan Mouton ◽  
Gavin Shatkin
Keyword(s):  
Real Estate ◽  
Urban Space ◽  
The Philippines ◽  
The State ◽  
Metropolitan Region ◽  
Public Private Partnerships ◽  
Public And Private ◽  
For Profit ◽  
Wide Range

This article explores the evolving role of real estate developers in the wider metropolitan region of Manila, the Philippines. We argue that, given the relational nature of these actors, they are a relevant object of analysis for the formulation of “mid-level” theories that take into account both global, macroeconomic trends and local, history-dependent contingencies.  As we consider developers’ activities and interactions with a wide range of public and private actors, we retrace their gradual empowerment since the beginning of the postcolonial period. As a handful of powerful land-owning families created real estate development companies, urban production quickly became dominated by a strong oligarchy capable of steering urban development outside the realm of public decision-making. Philippine developers subsequently strengthened their capacity by stepping into infrastructure provision, seemingly expanding their autonomy further.  More recently, however, we argue that while the role of private sector actors in shaping urban and regional trajectories has scaled up, their activities have been tethered more strongly to a state-sponsored vision of change. Both by reorienting public–private partnerships (PPP) toward its regional plans, and by initiating new forms of public–private partnerships that give it more control, the state is attempting to harness the activity of developers. We characterize this shift as a move from the “privatization of planning” to the “planning of privatization” of urban space.

Aktuelle Entwicklungen im Weltanschauungsrecht

2019 ◽  
Keyword(s):  
Assisted Suicide ◽  
The State ◽  
Criminal Prosecution ◽  
Genital Mutilation ◽  
Wide Range ◽  
Aktuelle Entwicklungen ◽  
Freedom Of Belief ◽  
State Schools ◽  
Secular State

This groundbreaking volume on secular law in Germany brings together scholars on a variety of topics regarding the separation of the state and religion. It conducts in-depth legal analyses dealing with a wide range of recent cases in which the rule of law and the neutral role of the secular state were put at risk by religious politics. The book’s 21 essays cover topics such as human rights, the constitutional roots of the secular state, freedom of belief and non-belief, medically assisted suicide, sexual self-determination, abortion, genital mutilation, criminal prosecution in the Catholic Church’s sex abuse scandal, the collection of church taxes by the state based on baptisms of infants and minors, the collection of special church fees from atheists and Muslims by the state, church labour law, discrimination against members of the Church of the Flying Spaghetti Monster and Islamic veils in state schools. With contributions by editors and authors Dr. Gerhard Czermak | RiBGH Prof. Dr. Ralf Eschelbach | Dr. Carsten Frerk | Prof. Dr. Michael Hassemer | Johann-Albrecht Haupt | Prof. Dr. Rolf Dietrich Herzberg | Prof. Dr. Matthias Franz | Dr. Volker Korndörfer | Prof. Dr. Hartmut Kreß | Ingrid Matthäus-Maier | RA Dr. Till Müller-Heidelberg | Prof. Dr. Reinhard Merkel | RA Ludwig A. Minelli | Dr. Jacqueline Neumann | Prof. Dr. Dres. h.c. Ulfrid Neumann | Prof. Dr. Holm Putzke | RA Dr. Winfried Rath | StaatsMin a.D. Diplom-Jurist Rolf Schwanitz | Prof. Dr. Jörg Scheinfeld | Dr. Michael Schmidt-Salomon | Sarah Willenbacher

scholarly journals QUARK–DIQUARK EQUATIONS OF STATE MODELS: THE ROLE OF INTERACTIONS

2003 ◽  
Vol 12 (03) ◽  
pp. 519-526 ◽  
Author(s):  
J. E. HORVATH ◽  
G. LUGONES ◽  
J. A. DE FREITAS PACHECO
Keyword(s):  
Equation Of State ◽  
Boundary Conditions ◽  
Neutron Stars ◽  
Hard Sphere ◽  
Degrees Of Freedom ◽  
Equations Of State ◽  
Compact Star ◽  
Star Models ◽  
State Models

Recent observational data suggests a high compacticity (the quotient M/R) of some "neutron" stars. Motivated by these works we revisit models based on quark–diquark degrees of freedom and address the question of whether that matter is stable against diquark disassembling and hadronization within the different models. We find that equations of state modeled as effective λϕ4 theories do not generally produce stable self-bound matter and are not suitable for constructing very compact star models, that is the matter would decay into neutron matter. We also discuss some insights obtained by including hard sphere terms in the equation of state to model repulsive interactions. We finally compare the resulting equations of state with previous models and emphasize the role of the boundary conditions at the surface of compact self-bound stars, features of a possible normal crust of the latter and related topics.

Western Asia

2020 ◽  
pp. 513-539
Author(s):  
Carolyn Routledge
Keyword(s):  
Case Studies ◽  
Ancient Egypt ◽  
The State ◽  
Academic Disciplines ◽  
Theoretical Approaches ◽  
Western Asia ◽  
Wide Range ◽  
History Of ◽  
Selection Of

Since Flinders Petrie, the importance of Western Asia to the history and development of culture in ancient Egypt has been recognized by scholars and has also been a significant driver in shaping Egyptological methodology and theoretical approaches. The study of relations between Western Asia and Egypt encompasses a wide range of specialisms given the broad range of evidence, the geographical breadth, and the academic disciplines involved. This chapter reviews the history of the study of relations between Western Asia and Egypt pointing to a selection of challenges scholars face in undertaking their research, and examines two case studies: theories concerning the role of Western Asia in the rise of the state, and the assessment of Egypt’s New Kingdom Empire in Canaan to illustrate the ways in which scholarly challenges are met and the resulting historical conclusions.

The Role of Effective Enforcement in International Law on Labour Migration

2020 ◽  
Vol 17 (1) ◽  
pp. 206-232
Author(s):  
Petra Herzfeld Olsson
Keyword(s):  
The State ◽  
Equal Treatment ◽  
Labour Migration ◽  
Access To Justice ◽  
The Social ◽  
Wide Range ◽  
Monitoring And Enforcement ◽  
Treatment Principle ◽  
Migration Law

Labour migrants shall according to the ILO and UN conventions on labour migration be provided with equal treatment with local workers with regard to working conditions including pay. Factors like migration law (creating dependence on employers and fears of expulsion) and limited access to justice, challenge the enforcement of the equal treatment principle. The social dumping argument has been raised by actors arguing for the closure of borders. However, labour migration is a feature of contemporary labour markets and the future world of work. Instead of rising walls measures to overcome obstacles against equal treatment must be considered. Effective monitoring and enforcement are crucial in this respect. The explicit enforcement provisions in the ILO and UN conventions are quite vague. In this paper it will be analysed to what extent the monitoring bodies of the relevant ILO and UN conventions demand for effective monitoring and enforcement of the equal treatment principle in their comments to the state parties and what kind of measures they suggest that the state parties shall take to make the equal treatment principle a reality. The analysis reveals that the monitoring bodies apply a context based interpretation of the provisions in the conventions, suggesting a wide range of measures to overcome the obstacles mentioned. The division between migration law and labour law turns out to be of less importance than the ambition to make equal treatment a reality.

Revolutionary Graffiti and Cairene Women

Women Rising ◽  
2020 ◽  
pp. 267-282
Author(s):  
Soumia Bardhan ◽  
Karen A. Foss
Keyword(s):  
Social Issues ◽  
Rhetorical Analysis ◽  
Public Spaces ◽  
The State ◽  
Street Art ◽  
Gender Dynamics ◽  
Wide Range ◽  
Egyptian Women ◽  
And Gender

Through an unparalleled explosion of street art and graffiti campaigns during and after the January 25, 2011, revolution, many public spaces in Cairo, Egypt, became symbols of people’s revolt against the state. These spaces resemble open-air galleries showcasing street art on a wide range of social issues. These graffiti encourage women to resist societal pressures and daily humiliation, reclaim public spaces, and confront existing power and gender dynamics. These graffiti show Egyptian women performing agency as they create their own depiction of the role of women in post-Mubarak Cairo. In this essay, Soumia Bardhan and Karen A. Foss perform a rhetorical analysis of the female-centered graffiti displayed in Cairo’s public spaces in post-Mubarak Egypt. They analyze street art and graffiti by prominent graffiti artists, significant graffiti campaigns, and their own photographs of graffiti taken at the sites.

scholarly journals New developments in reaction theory: preparing for the FRIB era

2018 ◽  
Vol 178 ◽  
pp. 03001 ◽  
Author(s):  
F.M. Nunes ◽  
P.C. Capel ◽  
Ch. Elster ◽  
L. Hlophe ◽  
Jin Lei ◽  
...  
Keyword(s):  
Heavy Nuclei ◽  
Core Excitation ◽  
Faddeev Equations ◽  
New Developments ◽  
The Status ◽  
Recent Developments ◽  
Reaction Theory ◽  
R Process ◽  
The Continuum

This is a brief report on the progress made towards an exact theory for (d,p) on heavy nuclei, which is important to determine neutron capture rates for r-process nuclei. We first discuss the role of core excitation in the framework of Faddeev equations. Following that, we provide the status of the Faddeev theory being developed in the Coulomb basis with separable interactions. We then present some recent developments on nonlocal nucleon optical potentials. Finally, the progress on the theory transfer to the continuum is summarized.

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