bluuebunny/crossref_metadata_2025_split huggingface dataset:
Metaheuristic‐based machine learning modeling of the compressive strength of concrete containing waste glass
Authors: Ben Seghier Mohamed El Amine , Golafshani Emadaldin Mohammadi , Jafari‐Asl Jafar , Arashpour Mehrdad 
Published: January 2023

AbstractWaste glass (WG) can be used as fine aggregate and powder in concrete mixtures, preventing pollution induced by this non‐biodegradable material. The properties of WG‐included concrete should be examined before its practical use. Compressive strength (CS) is one of the most crucial characteristics of concrete, and the measurement of which needs time‐consuming and expensive experiments. The use of machine learning (ML) methods for modeling the CS of concrete can help achieve more reliable and precise models. In this study, a comprehensive database of WG‐included concrete was collected from the literature. Next, four ML methods, including support vector regression (SVR), least‐square support vector regression (LSSVR), adaptive neuro‐fuzzy inference system (ANFIS), and multilayer perceptron neural network (MLP) were served in the CS modeling. A recently proposed metaheuristic method, called marine predators algorithm (MPA), was proposed to optimize the control parameters of the ML models to guarantee generalized accuracy. Results indicate that the hybrid LSSVR‐MPA model outperforms the other developed ML models comparing the error metrics with an RMSE = 2.447 MPa and R2 = 0.983. The sensitivity analysis reveals that replacing the cement with WG powder decreases the CS, whereas serving the WG as the replacement for natural fine aggregate improves the CS.
Optimal parameters for tall buildings with a single viscously damped outrigger considering earthquake and wind loads
Authors: Malik Faisal Nissar , Kolay Chinmoy 
Published: January 2023

SummaryTall buildings suffer from low inherent damping and high flexibility. Therefore, a core‐outrigger system is often used to stiffen such buildings. A modified form, known as the damped outrigger system, wherein vertically oriented dampers are installed between outriggers and perimeter columns, has been recently developed to supplement the damping. This paper studies the efficacy of a viscously damped outrigger system through dynamic analysis of a 60‐story tall building subjected to nonconcurrent earthquake and wind excitations. Two ground motion sets (100 accelerograms) are used for the former and wind tunnel test data for the latter. Effects of three building parameters, namely, (i) the core‐to‐column stiffness ratio, (ii) the outrigger location, and (iii) the damper size, on the dynamic characteristics and seismic and wind responses are evaluated. Effects of damper nonlinearity on seismic and wind responses are also investigated considering energy‐equivalent nonlinear viscous dampers. Finally, the optimum values of these parameters are determined. For example, the optimum outrigger location is found to be between
to
, where
is the height of the building. The results also show that the damped outrigger system significantly outperforms the conventional one for seismic excitation, and it is very effective in reducing the wind‐induced floor accelerations, provided the parameters are chosen appropriately.
Sketching Out the Contours
Authors: Agostino Ana , Elmhirst Rebecca , Gómez Marlene , Harcourt Wendy , Kotsila Panagiota 
Published: January 2023

AbstractIn this chapter, we set out the book’s engagements with feminist political ecology (FPE) theory and practice. We first position the book in relation to FPE discussions underlying how the field is evolving as an open-ended set of discourses responding to the different crises and disruptions caused by the last years of environmental, climate, health, economic and political crises. We then briefly explain how the book was shaped through four years of the relationships and knowledge co-production within the Wellbeing, Ecology, Gender and Community Innovative Training Network (WEGO-ITN), followed by a discussion on the main themes emerging in the book chapters and a finishing with a section indicating where the contributors of the book are heading next. The book is rooted in the networks and journeys between activism, academia and policy arenas reflecting on the many situated conversations and stories within FPE.
Untold Climate Stories: Feminist Political Ecology Perspectives on Extractivism, Climate Colonialism and Community Alternatives
Authors: Ekowati Dian , Maimunah Siti , Owen Alice , Wangari Muneri Eunice , Elmhirst Rebecca 
Published: January 2023

AbstractIn this chapter, we explore what is learned when our reflections on the systemic injustices that underpin climate change are woven together through feminist political ecology, with its emphasis on situated knowledges, lived experience and the everyday. Drawing on our research and activism in Kenya, Indonesia and the United Kingdom, we exchange reflections relating to extractivism and its logic of endless growth, corporate enclosure of land and water, erosion of biodiversity and the exploitation of life, enabled through coloniality. Extractivist depletion is what creates myriad forms of climate injustice. Bringing together stories from diverse contexts including communities impacted by mining and oil palm in Indonesia, oil drilling in the United Kingdom and pastoralists in Kenya, we show that while extractivism alters relationships with the land in extraordinarily harmful ways, mainstream climate stories obscure these realities and continue to decentre any sense of root causes. We share our reflections on the consequences that follow, but also show how shining a light on extractivism can reveal the persistence of healthier, reciprocal and replenishing relations with the land, water and creatures.
Ageing and Feminist Political Ecology
Authors: Dupuis Constance , Nakamura Nanako 
Published: January 2023

AbstractIn this chapter, we explore how applying a feminist political ecology (FPE) lens to ageing shows how ageing experiences are relational and dynamic processes of embodying everyday practices and ethics of care. We apply writings on post-capitalist community economies and rupturist gerontology and FPE intersectional thinking and link them to two studies of ageing in Japan and Uruguay. We analyse ageing as part of dynamic socionatural relations and the ethics of care including the agentic roles played by miso, machines, fungus, climate, and politics. Our chapter shows how the role played by socionatural relations in ageing experiences demands more careful attention.
Evidenzbasiertes Wildtiermanagement
Authors: Voigt Christian C. 
Published: January 2023

ZusammenfassungWildtiere sind in einer durch den Menschen intensiv genutzten Landschaft vielen anthropogenen Faktoren ausgesetzt, die nicht nur Einfluss auf ihre Bewegungen, sondern auch direkt Einfluss auf ihre Gesundheit und ihr Überleben haben. Manche Arten nutzen die anthropogenen Landschaften zu ihrem Vorteil und breiten sich aus, andere verlieren ihre Lebensräume. In diesem Buch werden die wissenschaftlichen Evidenzen zum Management ausgewählter Wildtierarten zusammengetragen. Ein evidenzbasiertes Management ist kritisch, um die Konflikte zwischen Menschen und Wildtieren zu reduzieren oder im besten Fall zu lösen. Diesem Ansatz folgend ist das Buch sowohl für die Wissenschaft als auch für die Praxis gedacht.Wild animals are exposed to many anthropogenic factors in a landscape intensively used by humans, which not only influence their movements but also directly affect their health and survival. Some species use anthropogenic landscapes to their advantage and flourish, others lose their habitats. This book brings together the scientific evidence on the management of selected wildlife species. Evidence-based management is critical to reduce or, in the best case, resolve human-wildlife conflicts. Following this approach, this book is intended for both academics and practitioners.
Das Management des Fuchses sollte auf wissenschaftlichen Grundlagen anstatt auf Annahmen basieren
Authors: Kistler Claudia , Gloor Sandra , Hegglin Daniel , Bontadina Fabio 
Published: January 2023

ZusammenfassungDer Rotfuchs Vulpes vulpes wird in Europa intensiv bejagt. Als Begründung für die Jagd wird aufgeführt, dass Füchse gefährdete Tierarten sowie Nutztiere erbeuten, Krankheiten auf den Menschen und auf Haustiere übertragen und für Konflikte mit den Menschen im Siedlungsraum sorgen. Allerdings gibt es zunehmend Belege, dass die vorherrschenden Methoden der Fuchsjagd, trotz grossem Aufwand durch die Jägerschaft, weder die Bestände noch die verursachten Schäden wirksam und nachhaltig reduzieren. Die Jagd auf Füchse basiert aktuell nicht auf wissenschaftlichen Grundlagen, denn es fehlen Bestandszahlen sowie klar definierte und messbare Ziele. Hinzu kommt, dass nicht evaluiert wird, wie sich die jagdlichen Eingriffe auf die Fuchsbestände auswirken. Zudem werfen verschiedene Jagdmethoden wie die Baujagd mit Hunden oder der Einsatz von Schrot grundsätzliche ethische und tierschützerische Fragen auf. Daher ist ein neues Managementkonzept für den Fuchs gefordert, das ökologische, ökonomische und ethische Kriterien beinhaltet und neben Abschüssen auch nicht-letale Massnahmen einbezieht. Dies unter anderem auch, weil die wachsenden Fuchsbestände im Siedlungsraum angepasste Lösungen erfordern. Im vorliegenden Kapitel zeigen wir auf, welche Grundlagen für ein evidenzbasiertes Fuchsmanagement notwendig sind.SummaryThe red fox Vulpes vulpes is intensively hunted in Europe. The reason given for the hunting are that foxes prey on endangered species and livestock, transmit zoonoses, transmit diseases to domestic animals, and cause conflicts with humans in urban areas. However, there is increasing evidence that the prevailing hunting methods are unlikely to effectively and sustainably reduce either populations or the damage caused, despite the large investment of time by hunters. The hunting of foxes is generally not based on scientific principles, there is a lack of population figures, clearly defined and measurable objectives, and there is no evaluation how hunting interventions impact fox populations. Furthermore, various hunting methods, such as den hunting with dogs or the use of shotgun pellets, raise profound ethical and animal welfare questions. Therefore, a new management concept for the red fox is required that takes ecological, economic and ethical criteria into account and includes non-lethal measures in addition to culling. Moreover, the growing urban fox populations require adapted solutions. In this chapter, we outline which basics are necessary for an evidence-based fox management.
Der Nordamerikanische Waschbär in Deutschland – Hintergrund, Konfliktfelder & Managementmaßnahmen
Authors: Michler Berit Annika , Dati Francesco , Michler Frank-Uwe 
Published: January 2023

ZusammenfassungDer Nordamerikanische Waschbär gehört zu den gebietsfremden Vertretern der deutschen Raubsäugerfauna und ist eine der am stärksten omnivor ausgerichteten Säugetierarten weltweit. Der seit Ende der 1930er-Jahre in Deutschland angesiedelte Kleinbär wird in den letzten Jahren vermehrt als Gefahr für einheimische Tierarten sowie als potenzieller Krankheitsüberträger wahrgenommen. Aufgrund seiner anpassungsfähigen, urbanophilen Lebensweise nehmen auch Mensch-Waschbär-Interaktionen und damit verbundene Problemfelder im Siedlungsraum zu. Der Artikel fasst den aktuellen Kenntnisstand zu den Auswirkungen der Waschbärenbesiedlung in Deutschland zusammen, gibt einen Überblick zum rechtlichen Status des Neubürgers und stellt konkrete Managementmaßnahmen und Handlungsempfehlungen als Resultat von Freilandforschung und Praxiserfahrung vor, mit denen die wesentlichen Konfliktfelder nachhaltig und effektiv minimiert werden können.SummaryThe North American raccoon is an introduced carnivore species in Germany and one of the most omnivorous mammal species worldwide. Established in Germany since the end of the 1930s, the procyonid has become increasingly perceived as a threat to native species as well as a potential vector of disease in recent years. Due to its adaptable, urbanophilic lifestyle, human-raccoon interactions and associated problems in settlement areas are also increasing. The article summarises the current state of knowledge on the impacts of raccoon settlement in Germany and provides an overview of the legal status of the newcomer. Concrete management measures and recommendations for action are presented as a result of field research and practical experience. In this way, the areas of conflict caused by the raccoon presence can be minimised sustainably and effectively.
Spread complexity and topological transitions in the Kitaev chain
Authors: Caputa Pawel , Gupta Nitin , Haque S. Shajidul , Liu Sinong , Murugan Jeff , Van Zyl Hendrik J. R. 
Published: January 2023

Abstract
A number of recent works have argued that quantum complexity, a well-known concept in computer science that has re-emerged recently in the context of the physics of black holes, may be used as an efficient probe of novel phenomena such as quantum chaos and even quantum phase transitions. In this article, we provide further support for the latter, using a 1-dimensional p-wave superconductor — the Kitaev chain — as a prototype of a system displaying a topological phase transition. The Hamiltonian of the Kitaev chain manifests two gapped phases of matter with fermion parity symmetry; a trivial strongly-coupled phase and a topologically non-trivial, weakly-coupled phase with Majorana zero-modes. We show that Krylov-complexity (or, more precisely, the associated spread-complexity) is able to distinguish between the two and provides a diagnostic of the quantum critical point that separates them. We also comment on some possible ambiguity in the existing literature on the sensitivity of different measures of complexity to topological phase transitions.
Holographic QFTs on AdSd, wormholes and holographic interfaces
Authors: Ghodsi A. , Ghosh J. K. , Kiritsis E. , Nitti F. , Nourry V. 
Published: January 2023

Abstract
We consider three related topics: (a) Holographic quantum field theories on AdS spaces. (b) Holographic interfaces of flat space QFTs. (c) Wormholes connecting generically different QFTs. We investigate in a concrete example how the related classical solutions explore the space of QFTs and we construct the general solutions that interpolate between the same or different CFTs with arbitrary couplings. The solution space contains many exotic flow solutions that realize unusual asymptotics, as boundaries of different regions in the space of solutions. We find phenomena like “walking” flows and the generation of extra boundaries via flow fragmentation.
On the stability of scale-invariant black holes
Authors: Boudet S. , Rinaldi M. , Silveravalle S. 
Published: January 2023

Abstract
Quadratic scale-invariant gravity non minimally coupled to a scalar field provides a competitive model for inflation, characterized by the transition from an unstable to a stable fixed point, both characterized by constant scalar field configurations. We provide a complementary analysis of the same model in the static, spherically symmetric setting, obtaining two Schwarzschild-de Sitter solutions, which corresponds to the two fixed points existing in the cosmological scenario. The stability of such solutions is thoroughly investigated from two different perspectives. First, we study the system at the classical level by the analysis of linear perturbations. In particular, we provide both analytical and numerical results for the late-time behavior of the perturbations, proving the stable and unstable character of the two solutions. Then we perform a semi-classical, non-linear analysis based on the Euclidean path integral formulation. By studying the difference between the Euclidean on-shell actions evaluated on both solutions, we prove that the unstable one has a meta-stable character and is spontaneously decaying into the stable fixed point which is always favoured.
On the saturation of late-time growth of complexity in supersymmetric JT gravity
Authors: Alishahiha Mohsen , Banerjee Souvik 
Published: January 2023

Abstract
In this work we use the modified replica trick, proposed in arXiv:2205.01150, to compute the late time behaviour of complexity for JT gravity with 𝒩 = 1 and 𝒩 = 2 supersymmetries. For the 𝒩 = 1 theory, we compute the late time behaviour of complexity defined by the “quenched geodesic length” and obtain the expected saturation of complexity at time $$ t\sim {e}^{S_0} $$
t
~

e

S
0

, to a constant value with time-independent variance. For the 𝒩 = 2 theory, we explicitly compute complexity at the disk level which yields the late-time linear growth of complexity. However, we comment on the expectation of the late-time saturation by speculating the trumpet partition function and the non-perturbative corrections to the spectral correlation, relevant for the late time behaviour of complexity. Furthermore, we compute the matter correlation functions for both the theories.
Comments on the entanglement spectrum of de Sitter space
Authors: Banks Tom , Draper Patrick 
Published: January 2023

Abstract
We argue that the Schwarzschild-de Sitter black hole entropy formula does not imply that the entanglement spectrum of the vacuum density matrix of de Sitter space is flat. Specifically, we show that the expectation value of a random projection operator of dimension d ≫ 1, on a Hilbert space of dimension D ≫ d and in a density matrix ρ = e–K with strictly positive spectrum, is $$ \frac{d}{D}\left(1+o\left(\frac{1}{\sqrt{d}}\right)\right) $$

d
D

1
+
o

1

d

, independent of the spectrum of the density matrix. In addition, for a suitable class of spectra the asymptotic estimates Tr (ρK) ~ ln D – o(1) and Tr [ρ(K – 〈K〉)2] = a〈K〉 are compatible for any order one constant a. We discuss a simple family of matrix models and projections that can replicate such modular Hamiltonians and the SdS entropy formula.
Binary collisions of dark matter blobs
Authors: Diamond Melissa D. , Kaplan David E. , Rajendran Surjeet 
Published: January 2023

Abstract
We describe the model-independent mechanism by which dark matter and dark matter structures heavier than ~ 8 × 1011 GeV form binary pairs in the early Universe that spin down and merge both in the present and throughout the Universe’s history, producing potentially observable signals. Sufficiently dense dark objects will dominantly collide through binary mergers instead of random collisions. We detail how one would estimate the merger rate accounting for finite size effects, multibody interactions, and friction with the thermal bath. We predict how mergers of dark dense objects could be detected through gravitational and electromagnetic signals, noting that such mergers could be a unique source of high frequency gravitational waves. We rule out objects whose presence would contradict observations of the CMB and diffuse gamma-rays.
On Some Singular Limits Arising in Fluid Dynamic Modelling
Authors: Donatelli Donatella 
Published: January 2023

AbstractFluid dynamic equations are used to model various phenomena arising from physics, engineering, astrophysics, geophysics. One feature is that they take place at different time and length scales and it is important to understand which phenomena occur according to the use of single scales or to the interactions of them. From a mathematical point of view, these various physical behaviours give rise to different singular limits and, consequently to a different analysis of the asymptotic state of the governing equations. In this paper we will analyse a very simplified model given by a linearised continuity equation and by the classical momentum equation which include terms that take into account of rotation and we will show, according to the values of different scales, that the asymptotic behaviour of the model will be those of an incompressible fluid or of a geostrophic flow. Finally we point out, that the set of equations analysed in the paper may also fit in the artificial compressibility approximation methods.
Laser welding of tailored blanks made of Al-Si-coated 22MnB5 steel using a filler wire and a variable energy distribution laser optics
Authors: Coviello Donato , von der Heydt Jana , Rullo Lorenzo , Keßler Michael , De Vito Mariarosaria , D’Angola Antonio , Sorgente Donato 
Published: January 2023

AbstractLaser welding of Al-Si-coated steels for hot stamping in automotive applications is problematic due to the mixing of the coating layers inside the molten pool that weakens the resulting weld seam. In this case, the most common welding procedure to overcome this issue consists in removing the Al-Si layer through laser ablation prior to the joining. This method continues to be the most widely used by major producers of tailor welded blanks, although in situ ablation of the Al-Si coating can be costly and time consuming. In this work, a novel approach consisting in joining as-received (i.e., not decoated) materials using a filler wire and an innovative variable energy distribution laser optics is introduced and tested on tailor welded blanks made of 22MnB5. Tensile tests of specimens obtained from a 33 full factorial design of experiment have shown an average value of ultimate tensile strength of 1523 MPa, which is much higher than the one usually observed in as-received welded then hot-stamped conditions and aligned with hot-stamped base material values. Hardness test results (494–543 HV0.5) were in the typical hot-stamped base material range of values as well, while SEM–EDS analyses detected no ferrite inclusions inside the fusion zone. Variations of the main process parameters have been considered on an iso-thickness and iso-material configuration, empirically demonstrating the stability and reliability of the proposed methodology as well as its suitability for production purposes.
Multiplicity and concentration of solutions to fractional anisotropic Schrödinger equations with exponential growth
Authors: Nguyen Thin Van , Rădulescu Vicenţiu D. 
Published: January 2023

AbstractIn this paper, we consider the Schrödinger equation involving the fractional $$(p,p_1,\dots ,p_m)$$

(
p
,

p
1

,
⋯
,

p
m

)

-Laplacian as follows $$\begin{aligned} (-\Delta )_{p}^{s}u+\sum _{i=1}^{m}(-\Delta )_{p_i}^{s}u+V(\varepsilon x)(|u|^{(N-2s)/2s}u+\sum _{i=1}^{m}|u|^{p_i-2}u)=f(u)\;\text{ in }\; {\mathbb {R}}^{N}, \end{aligned}$$

(
-
Δ
)

p

s

u
+

∑

i
=
1

m

(
-
Δ
)

p
i

s

u
+

V

(
ε
x
)

(
|
u
|

(
N
-
2
s
)
/
2
s

u
+

∑

i
=
1

m

|
u
|

p
i

-
2

u
)
=
f

(
u
)

in

R

N

,

where $$\varepsilon $$
ε
is a positive parameter, $$N=ps, s\in (0,1), 2\le p<p_1< \dots< p_m<+\infty , m\ge 1$$

N
=
p
s
,
s
∈

(
0
,
1
)

,
2
≤
p
<

p
1

<
⋯
<

p
m

<
+
∞
,
m
≥
1

. The nonlinear function f has the exponential growth and potential function V is continuous function satisfying some suitable conditions. Using the penalization method and Ljusternik–Schnirelmann theory, we study the existence, multiplicity and concentration of nontrivial nonnegative solutions for small values of the parameter. In our best knowledge, it is the first time that the above problem is studied.