bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cooperative user association and resource allocation for task offloading in hybrid GEO‐LEO satellite networks
Authors: Leng Tao , Duan Pengfei , Hu Dongwei , Cui Gaofeng , Wang Weidong 
Published: November 2021

SummaryHybrid geosynchronous earth orbit (GEO) and low earth orbit (LEO) satellite networks play an important role in future satellite‐assisted internet of things (S‐IoT). However, the limited satellite on‐board communication and computing resource poses a large challenge for the task offloading in the hybrid GEO‐LEO satellite networks. In this paper, the problem of task offloading is formulated as a cooperative user association and resource allocation problem. To tackle the problem, we model it as a Markov decision process and decompose it into two sub‐problems, which are sequential decisions for user association and resource allocation with fixed user association conditions. Deep reinforcement learning (DRL) is adopted to make sequential decisions to achieve long‐term benefits, and convex optimization method is utilized to obtain optimal communication and computing resource allocation. Simulation results show that the proposed method is superior to other referred schemes.
Corporate social responsibility and sustainability in the tourism sector: A systematic literature review and future outlook
Authors: Madanaguli Arun , Srivastava Shalini , Ferraris Alberto , Dhir Amandeep 
Published: November 2021

AbstractThe current study intends to synthesise extant studies addressing corporate social responsibility (CSR) and sustainability in the tourism sector. It employed qualitative content analysis to present the research profile, prominent conceptual, qualitative and quantitative studies, research gaps and future research questions. The review results indicate that research on CSR in tourism is a promising area of study that is growing rapidly. This review captures conceptual, qualitative and quantitative empirical studies and divides them into themes based on two typologies. Typology 1 addresses the direct effect of CSR on employees, customers and business performance. Typology 2 highlights the moderated and mediated relationships of variables, including customer trust, identification, trust and value with CSR. The findings provide a unifying framework highlighting the importance of CSR engagement in building relationships with various stakeholders in the tourism industry context. This contribution is one of the first reviews to examine the growing research on the CSR agenda in tourism. The tourist industry should recognise stakeholders' roles and attempt to involve them in their CSR initiatives.
Enhancement of the Photodegradation Activity of Methylene Blue by the Low‐temperature Regulation of Oxide‐rich Graphitic Carbon Nitride
Authors: Xie Kangle , Fang Junfei , Li Le , Deng Jianping , Liang Zhiyong 
Published: November 2021

AbstractOxygen‐rich graphitic carbon nitride (OCN‐3) was synthesized by low‐temperature regulation after the chemical oxidation of g‐C3N4, which was prepared by the calcination of melamine at a high temperature. Further, its photocatalytic activity was evaluated using methylene blue (MB) as the target pollutant for degradation. The characteristic results showed that OCN‐3 exhibited larger specific surface area (SSA) than pure g‐C3N4. Moreover, the recombination rate of its photogenerated carriers was significantly reduced. The photocatalytic degradation was performed with an MB solution that was prepared using ultrapure, tap, and lake water samples as the base liquids to measure the photocatalytic activity of OCN‐3. The experimental results display that the remove rate of MB has reached 83.7 %, 91.26 % and 95.2 %, respectively. The degradation of MB three consecutive times indicated that the catalyst exhibited good stability and reusability.
Chemodynamic Therapy via Fenton and Fenton‐Like Nanomaterials: Strategies and Recent Advances
Authors: Jia Chenyang , Guo Yuxin , Wu Fu‐Gen 
Published: November 2021

AbstractChemodynamic therapy (CDT), a novel cancer therapeutic strategy defined as the treatment using Fenton or Fenton‐like reaction to produce •OH in the tumor region, was first proposed by Bu, Shi, and co‐workers in 2016. Recently, with the rapid development of Fenton and Fenton‐like nanomaterials, CDT has attracted tremendous attention because of its unique advantages: 1) It is tumor‐selective with low side effects; 2) the CDT process does not depend on external field stimulation; 3) it can modulate the hypoxic and immunosuppressive tumor microenvironment; 4) the treatment cost of CDT is low. In addition to the Fe‐involved CDT strategies, the Fenton‐like reaction‐mediated CDT strategies have also been proposed, which are based on many other metal elements including copper, manganese, cobalt, titanium, vanadium, palladium, silver, molybdenum, ruthenium, tungsten, cerium, and zinc. Moreover, CDT has been combined with other therapies like chemotherapy, radiotherapy, phototherapy, sonodynamic therapy, and immunotherapy for achieving enhanced anticancer effects. Besides, there have also been studies that extend the application of CDT to the antibacterial field. This review introduces the latest advancements in the nanomaterials‐involved CDT from 2018 to the present and proposes the current limitations as well as future research directions in the related field.
Influences of plasticizer molecular structure and content on flexural fatigue of soft poly(vinyl chloride)
Authors: Liu Haiyang , Chen Yanlu , Zhu Hui , Ma Yao , Lian Chengbo , Shi Xinyan 
Published: November 2021

AbstractIn this work, three plasticizers with different molecular structures were used to plasticize poly(vinyl chloride) (PVC), and the influence of different plasticizers on the flexural fatigue properties of soft PVC was investigated. The plasticizer with the best plasticizing effect was selected, and five gradient dosages were set to study the optimal ratio of plasticizer and PVC. It was found that the glass transition temperature of samples with two phthalate plasticizers (DPHP, 1012P) was lower than that with trimellitate plasticizer (TM‐8). It has excellent low‐temperature mechanical properties and great flexural fatigue resistance. From the comparison of different plasticizer gradient formulations, the glass transition temperature, PVC plastisol viscosity, and melt strength decreased gradually with the increase of plasticizers. When PVC and plasticizer were 1:1 (PVC50P50), the plasticizing effect and the low‐temperature toughness of the sample were the best. The breaking energy (W) and fatigue cycles of Bally Flex at −20°C were 5173 J m−3 and 141 000, respectively. It was concluded that W and Bally Flex fatigue life have a good positive correlation n. Thus, tensile test can be simply used to predict Bally Flex fatigue life of samples.
New Energetic Metal‐Organic Framework (E‐MOF) based on a sodium(I)‐containing energetic metal salt incorporating guanidinium ions
Authors: Zhang Guofeng , Liu Yifei , Dong Zhen , Liu Yaxing , Li Haiyan , Ye Zhiwen 
Published: November 2021

AbstractSince there is an inherent contradiction between high‐detonation properties and reliable safety (or stability) with energetic materials, E‐MOFs provide an entirely new approach to balancing these properties. To explore the effects of the combination of MOFs with energetic materials and to elucidate their structure‐property relationships, we report herein the development of a novel guanidiniume (CH6N3+)‐containing E‐MOF based on the ligand di(2′H‐[1,5′‐bitetrazol]‐5‐yl)amine (C4H3N17), which was crystallized with a central sodium ion. The resulting [(CH6N3+)5(Na(I)‐(C4N173<M−>)2)]n solid featured a density of 1.625 g cm−3 and a decomposition temperature of 221 °C. The crystal structure of the complex featured a three‐dimensional layered structure with a significant number of hydrogen bonds between the layers. Moreover, the introduction of MOFs, provided a potential advantage over the dominant class of energetic materials, by boasting a multi‐dimensional structure with both non‐covalent interactions and covalent (coordination) bonds. As such, the introduction of shorter yet stronger coordination bonds in the E‐MOF led to a higher stability of the energetic material compared to only the weak (distant) intermolecular interactions of common explosives (i. e. hydrogen bonds).
M5-branes wrapped on a spindle
Authors: Ferrero Pietro , Gauntlett Jerome P. , Martelli Dario , Sparks James 
Published: November 2021

Abstract
We construct supersymmetric AdS5 × Σ solutions of D = 7 gauged supergravity, where Σ is a two-dimensional orbifold known as a spindle. These uplift on S4 to solutions of D = 11 supergravity which have orbifold singularites. We argue that the solutions are dual to d = 4, $$ \mathcal{N} $$
N
= 1 SCFTs that arise from N M5-branes wrapped on a spindle, embedded as a holomorphic curve inside a Calabi-Yau three-fold. In contrast to the usual topological twist solutions, the superconformal R-symmetry mixes with the isometry of the spindle in the IR, and we verify this via a field theory calculation, as well as reproducing the gravity formula for the central charge.
BMS algebra from residual gauge invariance in light-cone gravity
Authors: Ananth Sudarshan , Brink Lars , Majumdar Sucheta 
Published: November 2021

Abstract
We analyze the residual gauge freedom in gravity, in four dimensions, in the light-cone gauge, in a formulation where unphysical fields are integrated out. By checking the invariance of the light-cone Hamiltonian, we obtain a set of residual gauge transformations, which satisfy the BMS algebra realized on the two physical fields in the theory. Hence, the BMS algebra appears as a consequence of residual gauge invariance in the bulk and not just at the asymptotic boundary. We highlight the key features of the light-cone BMS algebra and discuss its connection with the quadratic form structure of the Hamiltonian.
Hypersimplicial subdivisions
Authors: Olarte Jorge Alberto , Santos Francisco 
Published: November 2021

AbstractLet $$\pi :{\mathbb {R}}^n \rightarrow {\mathbb {R}}^d$$

π
:

R

n

→

R

d

be any linear projection, let A be the image of the standard basis. Motivated by Postnikov’s study of postitive Grassmannians via plabic graphs and Galashin’s connection of plabic graphs to slices of zonotopal tilings of 3-dimensional cyclic zonotopes, we study the poset of subdivisions induced by the restriction of $$\pi $$
π
to the k-th hypersimplex, for $$k=1,\dots ,n-1$$

k
=
1
,
⋯
,
n
-
1

. We show that: For arbitrary A and for $$k\le d+1$$

k
≤
d
+
1

, the corresponding fiber polytope $${\mathcal {F}}^{(k)}(A)$$

F

(
k
)

(
A
)

is normally isomorphic to the Minkowski sum of the secondary polytopes of all subsets of A of size $$\max \{d+2,n-k+1\}$$

max
{
d
+
2
,
n
-
k
+
1
}

. When $$A=\mathbf {P}_{n}$$

A
=

P
n

is the vertex set of an n-gon, we answer the Baues question in the positive: the inclusion of the poset of $$\pi $$
π
-coherent subdivisions into the poset of all $$\pi $$
π
-induced subdivisions is a homotopy equivalence. When $$A=\mathbf {C}(d,n)$$

A
=
C
(
d
,
n
)

is the vertex set of a cyclic d-polytope with d odd and any $$n \ge d+3$$

n
≥
d
+
3

, there are non-lifting (and even more so, non-separated) $$\pi $$
π
-induced subdivisions for $$k=2$$

k
=
2

.
Frühe Hilfen aus der Distanz – Chancen und Herausforderungen bei der Unterstützung psychosozial belasteter Familien in der COVID-19-Pandemie
Authors: Renner Ilona , van Staa Juliane , Neumann Anna , Sinß Frank , Paul Mechthild 
Published: November 2021

ZusammenfassungKontaktbeschränkende Maßnahmen waren zur Eindämmung des SARS-CoV-2-Infektionsgeschehens ab Frühjahr 2020 in Deutschland notwendig. Jedoch stellten sie Familien, insbesondere Familien in Belastungslagen, vor besondere Herausforderungen. Der Beitrag geht der Frage nach, inwieweit sich die Coronapandemie bis zum Mai 2021 auf die Lebenssituation der Familien ausgewirkt hat und wie eine längerfristige Betreuung im Kontext der Frühen Hilfen fortgeführt werden konnte. Die Analysen basieren hauptsächlich auf einer qualitativen Studie mit psychosozial belasteten Müttern von jungen Kindern, 2 Befragungen von Gesundheitsfachkräften, die Familien in den Frühen Hilfen längerfristig unterstützen, sowie einer Befragung von kommunalen Akteuren, die für die Steuerung und Umsetzung der Frühen Hilfen in den Kommunen verantwortlich sind.Psychosozial belastete Familien erleben existenzielle Ängste und eine generelle Überforderung in der Pandemie. Innerfamiliale Konflikte scheinen zuzunehmen. Die längerfristige Unterstützung durch die Frühen Hilfen wurde vom persönlichen Kontakt im häuslichen Umfeld vorrangig in die Distanz verlagert. Obwohl im Verlauf der Pandemie viele Fachkräfte wieder zum ursprünglichen Versorgungskonzept zurückkehrten, werden Elemente der „Hilfe auf Distanz“ weiterhin ergänzend eingesetzt.Aufgrund der pandemiebedingten zusätzlichen Belastungen der Familien, die in den Frühen Hilfen begleitet werden, war die Fortführung der Unterstützung noch wichtiger als ohnehin schon. Die Formate einer „Hilfe auf Distanz“, die in der Pandemie notgedrungen erprobt wurden, könnten das Potenzial haben, die Hilfeleistungen der Gesundheitsfachkräfte in den Frühen Hilfen zu ergänzen und so zu einem Qualitätsentwicklungsschub beizutragen.
Imaging features of hepatic sinusoidal obstruction syndrome or veno-occlusive disease in children
Authors: Bohte Anneloes E. , Dierselhuis Miranda P. , van Noesel Max M. , Lequin Maarten H. 
Published: November 2021

AbstractHepatic sinusoidal obstruction syndrome, also known as veno-occlusive disease, can occur as a complication of myeloablative chemotherapy, as a result of low-intensity chemotherapy-related liver toxicity or radiotherapy of the liver. Symptoms of sinusoidal obstruction syndrome can range from asymptomatic to liver dysfunction or severe disease with life-threatening acute multi-organ failure. Imaging features can suggest or support this clinical diagnosis. Familiarity with the imaging spectrum of sinusoidal obstruction syndrome is therefore important for both radiologists and clinical oncologists. Here, multi-modality radiologic appearances of sinusoidal obstruction syndrome in pediatric patients are illustrated, including outcome after follow-up.
A curved surface representation method for convolutional neural network of wake field prediction
Authors: Ichinose Yasuo , Taniguchi Tomoyuki 
Published: November 2021

AbstractThe goal of this study is to develop a prediction method to recognize the wake field behind a ship using a convolutional neural network (CNN) model. First, a new representation method for a 3D curved surface is proposed suitable for the CNN, called an image-based hull form representation (IHR). The advantages of the proposed method are the high fidelity of its hull form representation using more than 20,000 input data points and its fast prediction speed, which requires less than 0.01 s for a task that traditionally took more than an hour to estimate by physics-based simulation. The IHR regards that a two-dimensional grid formed on the 3D curved hull surface, which is used for structured-grid-based CFD, as a data set with the same data structure as the image data. Because CNNs recognize image data at accuracy rates higher than humans, a CNN is also be expected to recognize 3D surface characteristics with higher accuracy than humans. The image data are represented by three primary colors (cyan, magenta, yellow) in vertical and horizontal (i × j) pixels. The hull-form-structured grid can also be expressed as an i × j structure data with (x, y, z) coordinates that have the same data structure as the three primary colors in the image data. A CFD calculation data set of 2730 ship types with different stern shapes was constructed to verify the proposed method. The validation results proves that the root mean squared error of the proposed model is 0.005 to predict axial wake velocity on a propeller plane, and the coefficient of determination R2 achieves 0.986. In addition, the estimation speed for each hull-form prediction is 100,000 times faster than are physics-based simulations. The results lead to the conclusion that the representation method of a curved surface and the proposed prediction method of the stern wake field is a promising tool in the initial hull form design.
Falls risk is predictive of dysphagia in Parkinson’s disease
Authors: Kobylecki Christopher , Shiderova Irena , Boca Mihaela , Michou Emilia 
Published: November 2021

Abstract
Objective
Evaluate the relationship between falls, freezing of gait, and swallowing disturbance in Parkinson’s disease (PD).

Background
Dysphagia is a common symptom in PD, and is often thought of as an axial feature along with falls and gait disturbance. It is of interest to examine the relationship between these symptoms in PD, given the possibility of shared pathophysiology due to non-dopaminergic and extranigral dysfunction.

Methods
We recruited 29 consecutive non-demented patients with idiopathic PD and at least one clinically determined impairment in swallowing, falls, or freezing of gait. Swallow dysfunction was assessed using the Swallowing Disturbance Questionnaire (SDQ). The Falls Efficacy Scale and Freezing-of-gait questionnaire were recorded. Correlation analysis and multiple regression were used to determine the relationship between swallow and gait disturbance.

Results
Total SDQ score correlated strongly with the falls efficacy scale (Spearman’s rho = 0.594; P = 0.001), but not with the freezing-of-gait score. Linear regression controlling for other factors associated with dysphagia identified falls efficacy score as a significant predictor of swallow dysfunction.

Conclusions
The severity of dysphagia in PD is closely related to severity of falls, but not gait freezing. This may be helpful to more precisely determine the anatomical substrate of levodopa-resistant axial symptoms in PD and provide clues to further management.
A continuum of intentionality: linking the biogenic and anthropogenic approaches to cognition
Authors: Sims Matthew 
Published: November 2021

AbstractBiogenic approaches investigate cognition from the standpoint of evolutionary function, asking what cognition does for a living system and then looking for common principles and exhibitions of cognitive strategies in a vast array of living systems—non-neural to neural. One worry which arises for the biogenic approach is that it is overly permissive in terms of what it construes as cognition. In this paper I critically engage with a recent instance of this way of criticising biogenic approaches in order to clarify their theoretical commitments and prospects. In his critique of the biogenic approach, Fred Adams (Stud Hist Philos Sci 68:20–30, 10.1016/j.shpsa.2017.11.007, 2018) uses the presence of intentional states with conceptual content as a criterion to demarcate cognition-driven behaviour from mere sensory response. In this paper I agree with Adams that intentionality is the mark of the cognitive, but simultaneously reject his overly restrictive conception of intentionality. I argue that understanding intentionalitysimpliciteras the mark of the mental is compatible with endorsing the biogenic approach. I argue that because cognitive science is not exclusively interested in behaviour driven by intentional states with the kind of content Adams demands, the biogenic approach’s status as an approach to cognition is not called into question. I then go on to propose a novel view of intentionality whereby it is seen to exist along a continuum which increases in the degree of representational complexity: how far into the future representational content can be directed and drive anticipatory behaviour. Understanding intentionality as existing along a continuum allows biogenic approaches and anthropogenic approaches to investigate the same overarching capacity of cognition as expressed in its different forms positioned along the continuum of intentionality. Even if all organisms engage in some behaviour that is driven by weak intentional dynamics, this does not suggest that every behaviour of all organisms is so driven. As such, the worry that the biogenic approach is overly permissive can be avoided.
Change in Hamiltonian General Relativity with Spinors
Authors: Pitts J. Brian 
Published: November 2021

AbstractIn General Relativity in Hamiltonian form, change has seemed to be missing, defined only asymptotically, or otherwise obscured at best, because the Hamiltonian is a sum of first-class constraints and a boundary term and thus supposedly generates gauge transformations. By construing change as essential time dependence (lack of a time-like Killing vector field), one can find change locally in vacuum GR in the Hamiltonian formulation just where it should be. But what if spinors are present? This paper is motivated by the tendency in space-time philosophy tends to slight fermionic/spinorial matter, the tendency in Hamiltonian GR to misplace changes of time coordinate, and the tendency in treatments of the Einstein-Dirac equation to include a gratuitous local Lorentz gauge symmetry along with the physically significant coordinate freedom. Spatial dependence is dropped in most of the paper, both restricting the physical situation and largely fixing the spatial coordinates. In the interest of including all and only the coordinate freedom, the Einstein-Dirac equation is investigated using the Schwinger time gauge and Kibble-Deser symmetric triad condition are employed as a$$3+1$$3+1version of the DeWitt-Ogievetsky-Polubarinov nonlinear group realization formalism that dispenses with a tetrad and local Lorentz gauge freedom. Change is the lack of a time-like stronger-than-Killing field for which the Lie derivative of the metric-spinor complex vanishes. An appropriate$$3+1$$3+1-friendly form of the Rosenfeld-Anderson-Bergmann-Castellani gauge generatorG, a tuned sum of first class-constraints, is shown to change the canonical Lagrangian by a total derivative, implying the preservation of Hamilton’s equations. Given the essential presence of second-class constraints with spinors and their lack of resemblance to a gauge theory (unlike, say, massive photons), it is useful to have an explicit physically interesting example. This gauge generator implements changes of time coordinate for solutions of the equations of motion, showing that the gauge generator makes sense even with spinors.