bluuebunny/crossref_metadata_2025_split huggingface dataset:
Anisotropic Adaptive Finite Elements for a p-Laplacian Problem
Authors: Passelli Paride , Picasso Marco 
Published: June 2024

Abstract
The p-Laplacian problem

-

∇
⋅

(

(

μ
+

|

∇
⁡
u

|

p
-
2

)

⁢

∇
⁡
u

)

=
f

{-\nabla\cdot((\mu+|\nabla u|^{p-2})\nabla u)=f}

is considered,
where μ is a given positive number. An anisotropic a posteriori residual-based error estimator is presented. The error estimator is shown to be equivalent, up to higher order terms, to the error in a quasi-norm. The involved constants being independent of μ, the solution, the mesh size and aspect ratio. An adaptive algorithm is proposed and numerical results are presented when

p
=
3

{p=3}

. From this model problem, we propose a simplified error estimator and use it in the framework of an industrial application, namely a nonlinear Navier–Stokes problem arising from aluminium electrolysis.
The New Law of the European Data Markets: Demystifying the European Data Strategy
Authors: Groza Teodora , Botero Arcila Beatriz 
Published: June 2024

Abstract
The European Data Strategy, published in 2020, aims to turn the EU into a society empowered by data which captures its benefits to generate improvements in health, well-being, the environment, transparent governance, and convenient public services. This article examines the European Data Strategy, focusing on the Data Act and Data Governance Act, and situates them within broader data governance discussions. It argues that the Strategy has at its centre a tension between fostering a robust, fair data market versus scepticism towards market-based data governance mechansims, and analyses to what extent the regulatory techniques the Data Strategy proposes can address this tension.
A comparative study of the cell wall level delignification behaviour of four Nordic hardwoods during kraft pulping
Authors: Kron Linus , Hasani Merima , Theliander Hans 
Published: June 2024

Abstract
Wood is a heterogeneous material with significant variation among species. This inherent complexity poses a challenge to the continuous expansion of our understanding of the kraft process; yet previous pulping research has mainly been limited to a few species. This study investigates variations among some less studied species and their cell wall level delignification behaviour during kraft pulping. Ground wood of birch, beech, aspen, and alder were pulped at near-constant composition and temperature conditions. Minor, yet significant, differences in the rates of their delignification were observed: aspen had a pronounced fast rate during the initial stage, whereas alder delignified more slowly relative to its high initial lignin content. The dissolution of xylan was substantially faster for birch. In contrast, no substantial differences were detected between the species in the molecular weight and structure of the dissolved wood components, suggesting that the different delignification behaviours stem from variations in the residual phase. The molecular weight distribution of dissolved lignin was uniform during the initial stage of pulping, which is indicative of rapid and extensive fragmentation. Subsequently, the weight increased continuously for the remainder of the process, suggesting that the mass transfer within the cell wall influenced the overall delignification kinetics.
Counter-Colonial Aspects in and Through Public History in Brazil: Participatory Research, Oral History and Corporeality – Embodied Ways of Storytelling
Authors: Rabêlo de Almeida Juniele 
Published: June 2024

Abstract
Based on the counter-colonial thought formulated by the Brazilian quilombola activist Nêgo Bispo (1959–2023), this article offers reflections on participatory research, social memory, and corporeality through discussions carried out by the Brazilian Public History Network (Rede Brasileira de História Pública) – specifically covering the projects produced by the Laboratory of Oral History and the Image at Fluminense Federal University – LABHOI/UFF (Rio de Janeiro/Brazil, created in 1982). The author explores and recognizes the colonial nature of public history practices and identifies a counter-colonial public history that is capable of going beyond text-only source-based public history or which is written only out of official colonial records. Public history, it is suggested, can do this by developing participatory practices with the creation of oral history collections and incorporating embodied ways of storytelling.
ℐ-monotonic convergence of sequences of bi-complex numbers
Authors: Deb Tapasi , Tripathy Binod Chandra 
Published: June 2024

Abstract
In this paper we investigate the concept of

ℐ

{\mathcal{I}}

-monotonic convergence of sequences of bi-complex numbers. We also discuss some partial order relations

≼

i
2

{\preccurlyeq_{i_{2}}}

and

≼

i
id

{\preccurlyeq_{i_{\rm id}}}

between two bi-complex numbers and

ℐ

{\mathcal{I}}

-convergence,

ℐ

{\mathcal{I}}

-monotonic sequences with respect to different partial order relations,

ℐ

{\mathcal{I}}

-Cauchy sequences,

ℐ

{\mathcal{I}}

-bounded monotonic sequences of bi-complex numbers. The analysis indicates that

ℐ

{\mathcal{I}}

-monotonicity with respect to

≼

i
2

{\preccurlyeq_{i_{2}}}

is not comparable with

ℐ

{\mathcal{I}}

-monotonicity with respect to

≼

i
id

{\preccurlyeq_{i_{\rm id}}}

.
Error estimates for simplified Levenberg–Marquardt method for nonlinear ill-posed operator equations in Hilbert spaces
Authors: Mahale Pallavi , Kumar Ankush 
Published: June 2024

Abstract
In this paper, we consider the simplified Levenberg–Marquardt method for nonlinear ill-posed inverse problems in Hilbert spaces for obtaining stable approximations of solutions to the ill-posed nonlinear equations of the form

F
⁢

(
u
)

=
y

{F(u)=y}

, where

F
:

𝒟
⁢

(
F
)

⊂
𝖴
→
𝖸

{F:\mathcal{D}(F)\subset\mathsf{U}\to\mathsf{Y}}

is a nonlinear operator between Hilbert spaces

𝖴

{\mathsf{U}}

and

𝖸

{\mathsf{Y}}

. The method is defined as follows:

u

n
+
1

δ

=

u
n
δ

-

(

T
0
∗

⁢

T
0

+

α
n

⁢
I

)

-
1

⁢

T
0
∗

⁢

(

F
⁢

(

u
n
δ

)

-

y
δ

)

,

u_{n+1}^{\delta}=u_{n}^{\delta}-(T_{0}^{\ast}T_{0}+\alpha_{n}I)^{-1}T_{0}^{%
\ast}(F(u_{n}^{\delta})-y^{\delta}),

where

T
0

=

F
′

⁢

(

u
0

)

{T_{0}=F^{\prime}(u_{0})}

and

T
0
∗

=

F
′

⁢

(

u
0

)

∗

{T_{0}^{\ast}=F^{\prime}(u_{0})^{\ast}}

. Here

F
′

⁢

(

u
0

)

{F^{\prime}(u_{0})}

denotes the Frèchet derivative of F at an initial guess

u
0

∈

𝒟
⁢

(
F
)

{u_{0}\in\mathcal{D}(F)}

for the exact solution

u
†

{u^{\dagger}}

,

F
′

⁢

(

u
0

)

∗

{F^{\prime}(u_{0})^{\ast}}

is the adjoint of

F
′

⁢

(

u
0

)

{F^{\prime}(u_{0})}

and

{

α
n

}

{\{\alpha_{n}\}}

is an a priori chosen sequence of non-negative real numbers satisfying suitable properties. We use Morozov-type stopping rule to terminate the iterations. Under suitable non-linearity conditions on operator F, we show convergence of the method and also obtain a convergence rate result under a Hölder-type source condition on the element

u
0

-

u
†

{u_{0}-u^{\dagger}}

. Furthermore, we derive convergence of the method for the case when no source conditions are used and the study concludes with numerical examples which validate the theoretical conclusions.
Determination of an unknown coefficient in the Korteweg–de Vries equation
Authors: Sang Lin , Qiao Yan , Wu Hua 
Published: June 2024

Abstract
In this paper, a space-time spectral method for solving an inverse problem in the Korteweg–de Vries equation is considered. Optimal order of convergence of the semi-discrete method is obtained in

L
2

{L^{2}}

-norm. The discrete schemes of the method are based on the modified Fourier pseudospectral method in spatial direction and the Legendre-tau method in temporal direction. The nonlinear term is computed via the fast Fourier transform and fast Legendre transform. The method
is implemented by the explicit-implicit iterative method. Numerical results are given to show the accuracy and capability of this space-time spectral method.
From the Visual to the Auditory in Heidegger’s Being and Time and Augustine’s Confessions
Authors: Fuyarchuk Andrew 
Published: June 2024

Abstract
Studies about the influence of sound and ambient environments on understanding and the affects, prior to intentional acts of consciousness, are employed to rectify self-fragmentation exemplified in Heidegger and Augustine. Due to a visual bias that suppresses his auditory disposition in Being and Time, Heidegger gestures toward Dasein’s fulfillment in social-being yet also recoils from it. To ameliorate this impasse, his underdeveloped modification of existence is revisited by way of Augustine’s attunement to rhetoricity during his conversion experience. As a result of embracing a shared ambient space, he brings care for others as oneself into the realm of “the with” and thereby verifies the significance of an auditory way of being-in-the-world to the formation of communities.
Martingale solutions to stochastic nonlocal Cahn–Hilliard–Navier–Stokes systems with singular potentials driven by multiplicative noise of jump type
Authors: Deugoué Gabriel , Ndongmo Ngana Aristide , Tachim Medjo Theodore 
Published: June 2024

Abstract
In the diffuse interface theory, the motion of two incompressible viscous fluids and the evolution of their interface are described by the well-known model H. The model consists of the Navier–Stokes equations, nonlinearly coupled with a convective Cahn–Hilliard type equation.
Here we consider a stochastic version of the model driven by a noise of Lévy type, and where the standard Cahn–Hilliard equation is replaced by its nonlocal version with a singular (e.g., logarithmic) potential. The case of smooth potentials with arbitrary polynomial growth has been already analyzed in [G. Deugoué, A. Ndongmo Ngana and T. Tachim Medjo,
Martingale solutions to stochastic nonlocal Cahn–Hilliard–Navier–Stokes equations with multiplicative noise of jump type,
Phys. D 398 2019, 23–68]. Taking advantage of this previous result, we investigate this more challenging and physically relevant case. Global existence of a martingale solution is proved with no-slip and no-flux boundary conditions in both 2D and 3D bounded domains.
In the two-dimensional case, we prove the uniqueness of weak solutions when the viscosity is constant.
The crystal structures of the ternary intermetallics RE
2Pd2Cd (RE = Nd, Sm, Gd, Dy) and RE
2Ga2Mg (RE = Tb, Er, Tm, Lu) at 90 K
Authors: Reimann Maximilian Kai , Kösters Jutta , Bieliauskas Tautvydas , Pöttgen Rainer 
Published: June 2024

Abstract
The crystal structures of the U3Si2-related intermetallic compounds RE
2Pd2Cd (RE = Nd, Sm, Gd, Dy) and RE
2Ga2Mg (RE = Tb, Er, Tm, Lu) were studied from single crystal X-ray diffraction data at T = 90 K in order to understand the slightly enhanced U
33 displacements of the 2a positions in their room temperature structures. The compounds Sm2Pd2Cd, Gd2Pd2Cd and Dy2Pd2Cd show a decrease of the ratio of U
33 to U
11 for the cadmium atoms, leading to a more isotropic behavior at low temperature, keeping the P4/mbm space group symmetry. Nd2Pd2Cd shows a translationengleiche symmetry reduction to space group P4bm along with a weak puckering effect with shorter (342.7 pm) and longer (345.7 pm) Cd–Nd distances within the Cd@Nd8 square prisms. This new, non-centrosymmetric superstructure variant was also observed for the magnesium compounds Tb2Ga2.069Mg0.931, Er2Ga2.104Mg0.896, Tm2Ga2.097Mg0.903 and Lu2Ga2.173Mg0.827, which show small degrees of Mg/Ga mixing.
Diverse bioactive secondary metabolites from Aspergillus terreus: antimicrobial, anticancer, and anti-SARS-CoV-2 activity studies
Authors: Hamed Abdelaaty , Abdel-Razek Ahmed S. , Abdelwahab Ahmed B. , El Taweel Ahmed , GabAllah Mohamed , Sewald Norbert , Shaaban Mohamed 
Published: June 2024

Abstract
Owing to its high interest as prolific source of diverse bioactive compounds referred in our previous research work, we have scaled-up the fermentation of the marine Aspergillus terreus LGO13 on a liquid culture medium to isolate and identify the very minor/further promising bioactive secondary metabolites and to study their antibacterial, cytotoxic, and antiviral properties. Twenty-three known bioactive metabolites, including the recently discovered microbial natural product N-benzoyl-tryptophan (1), were obtained herein. Their structures were determined using HR-ESI-MS 1D/2D NMR spectroscopy and data from the literature. The biological properties of the microbial extract and the resulting compounds were examined using a set of microorganisms, cervix carcinoma KB-3-1, nonsmall cell lung cancer (NSCLC) A549, and coronavirus (SARS-CoV-2), respectively. Molecular docking (MD) simulations were used to investigate the potential targets of the separated metabolites as anti-SARS-CoV-2 drugs. According to the current study, a viral protein that may be the target of anticovid drugs is a papain-like protease (PLpro), and chaetominine (2) appears to be a viable choice against this protein. We evaluated the antiviral efficacy of chaetominine (2), fumitremorgin C (6), and azaspirofuran A (9) against SARS-CoV-2 based on MD data. Chaetominine (2) and azaspirofuran A (9) displayed intermediate selectivity indices (SI = 6.6 and 3.2, respectively), while fumitremorgin C (6) displayed a high selectivity index (SI = 19.77). These findings show that fumitremorgin C has promising antiviral action against SARS-CoV-2.
Meta-analysis of short-term and long-term outcomes of robot-assisted and open radical surgery for hilar cholangiocarcinoma
Authors: Efanov M. G. , Tarakanov P. V. , Koroleva А. А. , Vankovich A. N. , Kovalenko D. E. , Fisenko D. V. , Tsvirkun V. V. 
Published: June 2024

Aim. To review the comparative studies into robot-assisted and open surgeries for hilar cholangiocarcinoma. Materials and methods. Search for the comparative studies into the results of robot-assisted and open surgeries in patients with hilar cholangiocarcinoma was performed using electronic databases Embase, MEDLINE, Web of Science and Google Scholar by keywords “robotic” AND “hilar cholangiocarcinoma” OR “perihilar cholangiocarcinoma” OR “Klatskin tumor” published by December 31, 2023. Results. The meta-analysis involves the results of 169 resections, including 53 robot-assisted and 116 open surgeries. Robot-assisted interventions revealed longer surgery duration (weighted mean difference (WMD) = 157.49, CI = 95 % [102.85; 212.12], р < 0.00001), less amount of intraoperative blood loss, close to statistically significant (WMD = −76.41, CI = 95 % [−159.90; 7.08], р = 0.07). Robot-assisted and open surgery groups appear comparable in terms of their perioperative parameters, including blood transfusion rate, number of R0 resections, number of lymph nodes removed, rate of postoperative complications, length of hospital stay, in-hospital mortality, as well as overall and event-free survival rates. Conclusion. Meta-analysis of short-term and long-term outcomes of robot-assisted and open surgeries for hilar cholangiocarcinoma of the liver and bile ducts proves the potential and possibility for using robotic technologies in selective patients.
Cholecystocholedocholithiasis as a cause of acute necrotizing pancreatitis in children
Authors: Pykhteev D. A. , Elin L. M. , Filyushkin Yu. N. , Elina M. O. , Verbovsky A. N. 
Published: June 2024

Aim. To improve treatment outcomes for acute biliary pancreatitis in children with cholecysto- and choledocholithiasis. Materials and methods. The authors conducted a retrospective analysis of the examination and treatment of 14 children aged 3–17 years with moderate and severe ABP. In 11 observations (78.5 %) the period from the onset of the disease to hospitalization comprised < 24 hours, in 3 observations (21.4 %) > 48 hours. All patients underwent a comprehensive examination including clinical, laboratory and instrumental diagnostics. Results. Ultrasound signs of acute cholecystitis were detected in 10 children (83.3 %), biliary hypertension – in 12 (85.7 %). Laparoscopic cholecystectomy was performed in 1 patient (7.14 %) within 72 hours from the onset of the disease; 1 child underwent open cholecystectomy with lithoextraction and drainage of the common bile duct according to Kerr technique. Open cholecystostomy with drainage of purulent-necrotic parapancreatitis was performed in 1 case. Endoscopic papillosphincterotomy, lithoextraction and cholangiography were performed in 4 children (28.6 %), 1 child additionally underwent stenting of the common bile duct and pancreatic duct. All patients were diagnosed with necrotizing pancreatitis and various types of parapancreatitis. Drainage of parapancreatitis in the Vladimirsky Moscow Regional Research Clinical Institute was performed in 5 (35.7 %) children: 2 (14.3 %) by open technique, in 2 (14.3 %) by laparoscopic sanation and in 1 by US-guided percutaneous drainage. Conclusion. Emergency endoscopic papillosphincterotomy with lithoextraction refers to a method of choice for the elimination of biliary hypertension in choledocholithiasis. Delayed or elective cholecystectomy is considered preferable for children with severe or moderately-severe acute biliary pancreatitis. The choice of drainage technique for infected parapancreatitis depends on the spread and sanation quality of purulent process.
Laparoscopic interventions in children with cystic bile duct dilations
Authors: Sokolov Yu. Yu. , Efremenkov A. M. , Utkina T. V. , Solodinina E. N. , Melekhina O. V. , Akhmatov R. A. , Lukovkina O. V. , Barskaya K. A. 
Published: June 2024

Aim. To evaluate the efficacy of laparoscopic interventions and to carry out a comparative analysis of various options for biliodigestive anastomoses in children with cystic dilation of bile ducts. Materials and methods. The results of laparoscopic interventions were retrospectively analyzed in 110 children aged 2 months – 17 years with cystic bile duct dilation. Conversion was required in 3 observations (2.7 %). Laparoscopically assisted or total laparoscopic extirpation of dilated bile ducts with hepaticojejunostomosis was performed in 83 patients (75.5 %), laparoscopic surgery with hepaticoduodenostomosis – in 24 patients (21.8 %). Results. The duration of surgery was significantly shorter when hepaticoduodenoanastomosis was formed. After laparoscopic interventions, early complications were revealed in 10 observations (9.3 %), including 7 cases (6.5 %) of hepatico-duoduodenoanastomosis failure in which relaparotomy was performed with reconstruction of both interintestinal and biliodigestive anastomosis. Late postoperative complications (anastomotic stenosis and adhesive intestinal obstruction) developed in 11 patients (10.2 %). In 5 observations (4.6 %), percutaneous transhepatic cholangiostomy with staged balloon dilation of hepaticojejunostomosis (n = 3) and endoscopic balloon dilation of hepaticoduodenostomosis with stenting (n = 2) were performed with a positive effect. Conclusion. Resection of bile ducts with cystic dilations with the formation of biliodigestive anastomosis can be performed both via video-assisted surgery and completely laparoscopically. Laparoscopic interventions in children with different variants of cystic dilation of the bile ducts prove to be effective and safe.
Endoscopic pancreatic interventions in children
Authors: Solodinina E. N. , Zykin A. P. , Fomicheva N. V. , Pakhomova A. Yu. , Sivolob D. V. , Korovin S. A. 
Published: June 2024

Aim. To increase the efficiency of surgical treatment for children with pancreatic malformations and diseases using endoscopic interventions. Materials and methods. The study enrolled 39 children aged 3–17 years who underwent 58 endoscopic interventions. Results. Transpapillary interventions were performed in 14 children with pancreatic duct abnormalities. Stenosis of the proximal pancreatic ducts was revealed in 5 observations – stenting was performed. Lithiasis of Wirsung's duct was confirmed in 4 observations, an abnormality in the form of an incomplete pancreas divisum was revealed in 3 of them. Pancreas divisum was detected in 1 patient, sphincterotomy of the minor duodenal papilla was performed. Transmural interventions were carried out in 24 observations: puncture – in 10 patients with intra- or parapancreatic cystic formations, drainage – in 14 patients with pseudocysts. Combined transpapillary and transmural surgery was performed in a child with traumatic pancreatic disruption. Conclusion. Transpapillary interventions prove to effectively eliminate hypertension in the pancreatic ducts in children. Transmural procedures can be used to drain pancreatic pseudocysts in children.
Pancreas with high pancreatic fistula risk, pancreatoduodenectomy or pancreatectomy? Cohort retrospective study
Authors: Khatkov I. E. , Tsvirkun V. V. , Izrailov R. E. , Tyutyunnik P. S. , Solovyev N. O. 
Published: June 2024

Aim. To compare treatment outcomes and quality of life in patients undergoing pancreatoduodenectomy and pancreatectomy with risk of postoperative pancreatic fistula > 50 % according to the UA-FRS scale. Materials and methods. The study involved the results of treatment of 14 patients with neoplasms of the hepatopancreaticoduodenal zone, who were intraoperatively chosen to undergo pancreatectomy instead of pancreatoduodenectomy. In all patients, the risk of forming a pancreatic fistula after surgery was ≥ 50 % (UA-FRS). The experimental group consisted of 14 patients comparable in diagnosis, age, and comorbidities, who underwent pancreatoduodenectomy with the same risk of pancreatic fistula. Results. Complications ≥ IIIa according to Clavien–Dindo were observed in 6 patients (42.8 %) in the pancreatectomy group and in 8 patients (51.7 %) in the resection group. 5 patients (35.7 %) in the resection group revealed postoperative pancreatic fistula of class B and C, according to ISGPS. Length of hospital stay after surgery and 30-day mortality did not differ between groups. Quality of life after surgery had no pronounced differences between the groups according to most scales. Symptoms related to digestive disorders in those who underwent pancreatoduodenectomy were more pronounced. Patients in the pancreatectomy group were more susceptible to symptoms associated with diabetes mellitus, and experienced greater financial difficulties. Conclusion. Pancreatectomy fails to provide a significant reduction in the incidence of postoperative complications and mortality. In exceptional situations, increasing the extent of surgery to pancreatectomy may be the right solution, with comparable results, without compromising quality of life. Prior to surgery, pancreatectomy should not be considered as the main planned extent of surgery. The final decision on the extent of intervention should be made intraoperatively by a multidisciplinary team. Preserving part of the pancreas is essential, if possible.