bluuebunny/crossref_metadata_2025_split huggingface dataset:
Nonnegative solutions of a fractional differential inequality on Grushin spaces and nilpotent Lie groups
Authors: Zhao Nan , Liu Yu 
Published: August 2022

Abstract
In this paper, we investigate the nonnegative solutions of the differential inequality

u
p

≤

ℒ
s

⁢
u

u^{p}\leq\mathcal{L}^{s}u

on the Grushin space

𝔾
α
n

{\mathbb{G}_{\alpha}^{n}}

for

(
p
,
s
,
α
)

∈

(
1
,
∞
)

×

(
0
,
1
)

×

(
0
,
∞
)

{(p,s,\alpha)\in(1,\infty)\times(0,1)\times(0,\infty)}

, where the

ℒ
s

{\mathcal{L}^{s}}

are
the fractional powers of the Grushin operator

ℒ

{\mathcal{L}}

. We show
that any nonnegative solution of the fractional order differential
inequality displayed above is zero if and only if

p
≤

Q

Q
-

2
⁢
s

{p\leq\frac{Q}{Q-2s}}

,
where Q is the homogeneous dimension of

𝔾
α
n

{\mathbb{G}_{\alpha}^{n}}

.
Moreover, we also consider the similar problems of nonnegative weak
solutions of the fractional sub-Laplacian differential inequality on nilpotent Lie groups.
On the Hölder continuity of ring Q-homeomorphisms
Authors: Arsenović Miloš , Mateljević Miodrag 
Published: August 2022

Abstract
We prove the Hölder continuity of a homeomorphism f defined on a bounded
domain

Ω
⊂

ℝ
n

{\Omega\subset\mathbb{R}^{n}}

with Lipschitz boundary. The
homeomorphism f is assumed to belong to a certain Orlicz–Sobolev class
and to satisfy a distortion condition near the boundary.
Structure optimization of continuous casting tundish with channel-type induction heating using mathematical modeling
Authors: Yang Bin , Liu Kun , Lei Hong , Han Peng 
Published: August 2022

Abstract
There are few studies on the shape and structure of the channel-type induction heating tundish on multi-physics field. Computational fluid dynamics has been used to study the influence of the structure of the tundish on the macroscopic transport behavior of the tundish with channel induction heating. The results show that increasing the depth of the molten pool is conducive to dynamic behavior of multiphase, the deeper the molten pool, the larger the active area, the longer residence time, the more inclusions removal and the higher ratio of plug to dead volume. Meanwhile, the larger the channel diameter, the more inclusions removal in the receiving chamber and channel. The channel induction heating has enough ability to increase the superheat and temperature compensate for the heat loss caused by the excessive residence time of the molten steel in the tundish. The change in the channel structure is crucial to the macroscopic transport behavior of the fluid. The change in channel diameter has the greatest effect on the multi-physics field in the molten pool.
Non-contact heating efficiency of flowing liquid effected by different susceptors in high-frequency induction heating system
Authors: Shi Mingxuan , Fu Jingyu , Xu Qing , Wu Long , Wang Ruifang , Zheng Zhaoqi , Li Zhanyong 
Published: August 2022

Abstract
The skin effect causes about 86% of the energy to be concentrated in the narrow surface layer during the induction heating process, which leads to the uneven temperature distribution during the treatment of flowing liquid by induction heating technology. The concentration of heat caused by the skin effect can be avoided by dispersing the induced heating metal structure in the treated fluid, but in most cases, this will lead to a decrease in heating efficiency. Therefore, the purpose of this study is to compare and design the susceptor structures that can avoid the heating concentration problem caused by the skin effect and have higher efficiency. Hence, in this research four kinds of susceptor structures that are the metal sphere, sheet metal, static mixer, and metal pipe were studied. The results show that the combination of metal sphere susceptor and sheet metal susceptor can result in higher heating efficiency than the metal sphere susceptor alone. Ferromagnetic stainless steel with lower relative permeability is more suitable for making sheet metal susceptor than paramagnetic stainless steel. Adding internal components to the metal pipe susceptor will not change its heating efficiency. The heating efficiency of metal sphere type susceptor, sheet metal susceptor, and static mixer susceptor can be up to 58%, 64%, and 67%, respectively. When 430 metal pipe heater is used, the highest heating efficiency can be obtained, and the highest heating efficiency is 80%.
Catheter-associated urinary tract infection: an overview
Authors: Venkataraman Rajesh , Yadav Umesh 
Published: August 2022

Abstract
CAUTIs (catheter-associated urinary tract infections) continue to be one of the most common health-care-related illnesses in the entire globe. CAUTIs are the cause of 40% of all hospital-acquired infections and 80% of all nosocomial urinary tract infections (UTIs). A urine catheter is implanted into a high percentage of inpatients at some point during their hospitalization, and indwelling urinary catheter adoption likely to be on the rise. Urinary catheters, made of plastic materials, inhibit the urinary tract’s natural defence mechanisms and enhance the bacterial colonization or biofilm formation on the catheter surface, which may cause CAUTIs. It is associated with increased burden of disease, mortality, hospital bills and length of hospital stay. Therefore, to prevent these infections, technological innovations in catheter materials that limit biofilm formation will be required. Unfortunately, many health-care practitioners are unclear of the precise indications for bladder catheterization and accurate CAUTI criteria, which can lead to unnecessary catheterization, antibiotic overuse for asymptomatic bacteriuria and the spread of resistant organisms. As a result, we discuss CAUTIs in general, including definitions, pathophysiology, causation, indications for catheterization and a variety of effective CAUTI-fighting strategies.
Mechanical properties of laminated bamboo composite as a sustainable green material for fishing vessel: Correlation of layer configuration in various mechanical tests
Authors: Manik Parlindungan , Samuel Samuel , Tuswan Tuswan , Jokosisworo Sarjito , Nadapdap Rossy Kristia 
Published: August 2022

Abstract
With the increased emphasis on the need to use recyclable bio-based materials and a better understanding of the mechanical properties of laminated bamboo, there is currently a great deal of interest in developing a new generation of low-cost bamboo-based composites for use in fishing vessels. Laminated bamboo composites (LBCs) comprised of Apus bamboo (Gigantochloa apus) and fibreglass mats were investigated to obtain the mechanical characteristics. The LBC with 45°/−45° cross-fibre directions combined with chopped strand mat fibreglass was developed under different layers and mass fractions with the same composite thickness. The influence of different numbers of laminated bamboo layers (3–7 layers) on several mechanical testings, including impact tests using ASTM D256, bending tests using ASTM D7264, tensile tests using ASTM D3039, V-notched beam test using ASTM D7078, and lap shear tests using ASTM D5868 standard, were carried out. The result showed that the strategy in improving the strength properties of LBCs could be achieved by using a thinner bamboo lamina with a higher number of bamboo layers. It was found that bamboo composites with 7 layers with a higher epoxy mass matrix had superior mechanical properties than those with 3 and 5 layers at the same thickness. Another finding revealed that adding fibreglass mat to current LBCs improved mechanical properties compared to previous research, explicitly bending strength increased by about 4.02–7.56% and tensile strength in the range of 12.44–17.73%. It can be found that only specimen with 7 layers fulfils the Indonesian Bureau Classification’s bending and tensile strength threshold.
Crystal structure of Diaqua[5,5′-dicarboxy-2,2′-(propane-1,3-diyl)bis(1H-imidazole-4-carboxylato-k4
O,O′,N,N′)]iron(II), C13H14FeN4O10
Authors: Zhang Ya-Ping , Pu Lu-Yu , Sun De-Mei 
Published: August 2022

Abstract
C13H14FeN4O10, orthorhombic, Pcca (no. 54), a = 13.2154(4) Å, b = 16.9075(6) Å, c = 13.9347(5) Å, V = 3113.56(18) Å3, Z = 8, R

gt
(F) = 0.0362, wR

ref
(F
2) = 0.0971, T = 293(2) K.
Electron capture detector based on X-ray ionization
Authors: Kueddelsmann Maximilian J. , Bunert Erik , Zimmermann Stefan 
Published: August 2022

Zusammenfassung
In dieser Arbeit wird ein Elektroneneinfangdetektor basierend auf weicher Röntgenionisation mit vergleichbarer Performance bezüglich radioaktiver Elektroneneinfangdetektoren mit geringsten Nachweisgrenzen im pptv-Bereich und einer Linearität über drei Größenordnungen vorgestellt. In Elektroneneinfangdetektoren werden freie Elektronen erzeugt und deren Menge über die Entladung an einer Faraday-Detektorplatte ermittelt. Eintretende elektronenaffine Substanzen vermindern die Menge der messbaren Elektronen, wodurch die Substanzkonzentration bestimmt werden kann. Typischer Weise ionisieren zunehmend reglementierte radioaktive Strahler wie 63Ni mit bis zu 400 MBq Stickstoff zur Erzeugung freier Sekundärelektronen. Diese Ionisation findet im hier vorgestellten Elektroneneinfangdetektor mittels einer zulassungs- und anzeigefreien Röntgenröhre (unter 30 kV und 0,1 μSv/h im Abstand von 0,1m über berührbaren Oberflächen) statt [5].
On the Detection of Propofol in Exhaled Air by MOS Gas Sensors
Authors: Bur Christian , Lensch Henrik , Maurer Felix , Kreuer Sascha , Schütze Andreas 
Published: August 2022

Zusammenfassung
Eine nicht invasive online Überwachung von Medikamenten-Konzentrationen in der Ausatemluft kann eine hohe therapeutische Bedeutung haben. In dieser Arbeit werden kommerzielle Halbleitergassensoren, insbesondere der ENS160 von ScioSense, im temperaturzyklischen Betrieb auf Eignung zur Quantifizierung des intravenösen Anästhetikums Propofol untersucht. Der Anwendungsfall Propofol wurde ausgewählt, da hier bereits eine Korrelation zwischen Plasmakonzentration und Konzentration in der Ausatemluft nachgewiesen wurde. Basierend auf einer Laborkalibrierung mit variierender Feuchte und Ethanol-Konzentration wird ein Regressionsmodell gebildet, das den Einfluss der Störgrößen unterdrückt und die Propofol-Konzentration vorhersagen kann. Ethanol wurde als Störgas gewählt, da es zum einen im klinischen Bereich vermehrt auftritt und gleichzeitig einen großen Störeinfluss auf MOS Sensoren hat. Der Validierungsfehler liegt bei 4 ppb für einen Konzentrationsbereich von 0 ppb bis 40 ppb, was den Schluss nahe legt, dass die Sensoren prinzipiell zur Überwachung geeignet sind.
Herausforderungen bei computertomografischen Untersuchungen von Fügeverbindungen
Authors: Busch Matthias , Butzhammer Lorenz , Hausotte Tino 
Published: August 2022

Zusammenfassung
Die Erkennbarkeit von Rissen und geometrischen Qualitätskennwerten von Fügeverbindungen mittels Computertomografie ist von der Interfacestrukturauflösung abhängig, welche mittels geeigneter Prüfkörper untersucht wird. Die Reduktion von Abbildungsartefakten im Bereich von Bauteilzwischenräumen und -oberflächen verbessert deren dimensionelle Erfassbarkeit.
SUSTENTABILIDADE CULTURAL NUMA COMUNIDADE INDÍGENA
Authors: Lucas Coelho de Sousa João , Pinto de Amorim Andriele 
Published: August 2022

A transmissão do conhecimento na sociedade pode representar a preservação de valores culturais ao mesmo tempo em que ocorre o desenvolvimento econômico-social. A presente pesquisa tem como objetivo investigar como ocorrem os processos de conversão do conhecimento voltados à sustentabilidade cultural em uma comunidade indígena do estado do Ceará. Para isso, realizou-se uma pesquisa qualitativa e de natureza descritiva conduzida por meio de uma pesquisa documental que utilizou vídeos da plataforma Youtube como fonte de dados primários. Para análise dos vídeos, utilizou-se a técnica de análise de conteúdo e analisaram-se os dados pela perspectiva teórica da sustentabilidade cultural e dos processos de conversão do conhecimento de Nonaka e Takeuchi. Os resultados de pesquisa possibilitaram a identificação dos processos de conversão do conhecimento na etnia Pitaguary e evidenciaram suas relações com a sustentabilidade cultural, evidenciando que ambientes de compartilhamento de conhecimentos e experiências no contexto de escolas diferenciadas e museus se tornam essenciais para continuidade da cultura. Além disso, preocupações com questões socioeconômicas, como ocupação do solo, trilhas ecológicas e turismo, emergem das narrativas dos indígenas.
PANORAMA DO USO DE MÉTODOS QUANTITATIVOS EM PESQUISAS SOBRE AVALIAÇÃO DA PEGADA DE CARBONO NAS INSTITUIÇÕES DE ENSINO SUPERIOR
Authors: Guilherme Fuchs Paulo , Vieira Soares Sandro , Martins Cristina , Regina de Aguiar Dutra Ana , Baltazar Salgueirinho Osório de Andrade Guerra José 
Published: August 2022

O emprego apropriado de métodos quantitativos em pesquisas na área da sustentabilidade é fundamental para proporcionar iniciativas que culminem em desenvolvimento sustentável, uma vez que a diversidade de opções lógicas existentes para a concepção e realização de pesquisas científicas encontram-se cada vez mais especializadas com o desenvolvimento de softwares e ganhos de qualidade dos recursos digitais. A presente investigação procurou representar a conjuntura atual dos métodos quantitativos utilizados em pesquisas que abordam avaliação da pegada de carbono nas instituições de ensino superior. O estudo é bibliográfico, já que explorou uma amostra de 20 artigos científicos publicados entre 2016 e 2021 relacionados ao assunto. Os resultados da pesquisa mostram que a maioria das publicações sobre o tema utilizou da técnica de análise de regressão múltipla, com 35%. O questionário foi utilizado para coleta de dados na maioria dos estudos, com 75%, seguidos pela pesquisa documental, com 25%. Os resultados mostram a predominância do uso da escala de mensuração Likert de 5 pontos, em 40% dos artigos. A pesquisa permitiu concluir que os principais estudos relacionam não só as emissões de carbono ou o uso de energia, mas diferentes outras variáveis para medir e interpretar o instrumento da pegada de carbono. O estudo ajudou a expandir o entendimento a respeito da utilização dos métodos quantitativos em pesquisas sobre o tema e evidenciou alguns percursos metodológicos que podem sustentar estudos futuros.
Evolutionary adaptation of the protein folding pathway for secretability
Authors: Smets Dries , Tsirigotaki Alexandra , Smit Jochem H , Krishnamurthy Srinath , Portaliou Athina G , Vorobieva Anastassia , Vranken Wim , Karamanou Spyridoula , Economou Anastassios 
Published: August 2022

AbstractSecretory preproteins of the Sec pathway are targeted post‐translationally and cross cellular membranes through translocases. During cytoplasmic transit, mature domains remain non‐folded for translocase recognition/translocation. After translocation and signal peptide cleavage, mature domains fold to native states in the bacterial periplasm or traffic further. We sought the structural basis for delayed mature domain folding and how signal peptides regulate it. We compared how evolution diversified a periplasmic peptidyl‐prolyl isomerase PpiA mature domain from its structural cytoplasmic PpiB twin. Global and local hydrogen–deuterium exchange mass spectrometry showed that PpiA is a slower folder. We defined at near‐residue resolution hierarchical folding initiated by similar foldons in the twins, at different order and rates. PpiA folding is delayed by less hydrophobic native contacts, frustrated residues and a β‐turn in the earliest foldon and by signal peptide‐mediated disruption of foldon hierarchy. When selected PpiA residues and/or its signal peptide were grafted onto PpiB, they converted it into a slow folder with enhanced in vivo secretion. These structural adaptations in a secretory protein facilitate trafficking.
Notas sobre el Género Callitriche L. en Galicia
Authors: Romero Bujan Maria Inmaculada 
Published: August 2022

En el género Callitriche L. se presentan especies que pueden presentar heterofilia, lo cual no facilita la identificación de las mismas y ha favorecido, a través del tiempo, la citación de diversas especies así como la citación de numerosas variedades en su área de distribución. Galicia no ha sido una excepción en ese sentido citándose diferentes especies y variedades. Una de las especies citadas es C. palustris, especie amenazada en la Península Ibérica e incluida en el Decreto 88/2007, por el que se regula el Catálogo gallego de especies amenazadas, donde figura en su Anexo I, en el que se recogen los taxones y poblaciones catalogadas “en peligro de extinción“.
Después de un estudio bibliográfico y de la revisión de los principales herbarios que albergan material gallego del género, (Herbario LOU y Herbario SANT), se concluye que en Galicia se han identificado las siguientes especies: C. brutia, C. hamulata y C. stagnalis. Las citaciones correspondientes a C. palustris deben desestimarse, al estar basada su presencia en el territorio gallego en identificaciones erróneas.
Protecting Children From Sexual Abuse by Health Care Professionals and in the Health Care Setting
Authors: Laskey Antoinette , Haney Suzanne , Northrop Sarah ,   THE COUNCIL ON CHILD ABUSE AND NEGLECT
Published: August 2022

Sexual abuse or exploitation of children is never acceptable. Such behavior by pediatricians and health care professionals is particularly concerning because of the trust that children and their families place on adults in the health care profession. The American Academy of Pediatrics stands strongly behind the social and moral prohibition against sexual abuse or exploitation of children by health care professionals.
Pediatricians and health care professionals should be trained to recognize and abide by appropriate provider-patient boundaries. Medical institutions should screen staff members for a history of child abuse issues, train them to respect and maintain appropriate boundaries, and establish policies and procedures to receive and investigate concerns about patient abuse. Everyone has a responsibility to ensure the safety of children in health care settings and to scrupulously follow appropriate legal and ethical reporting and investigation procedures.
First detection of a colistin-resistant Klebsiella aerogenes isolate from a critically ill patient with septic shock in Bulgaria
Authors: Peykov Slavil , Stratev Alexander , Kirov Boris , Gergova Raina , Strateva Tanya 
Published: August 2022

Abstract
Colistin is considered as the last-line antibiotic for the treatment of infections caused by extensively drug-resistant Gram-negative pathogens belonging to the ESKAPE (
Enterococcus faecium,
Staphylococcus aureus,
Klebsiella pneumoniae,
Acinetobacter baumannii,
Pseudomonas aeruginosa, and
Enterobacter species) group. The present study aimed to explore the colistin resistance mechanisms of a Klebsiella aerogenes (formerly Enterobacter aerogenes) isolate (Kae1177-1bg) obtained from a Bulgarian critically ill patient with septic shock in 2020. Antimicrobial susceptibility testing and whole-genome sequencing using DNA nanoball technology were performed. The resulting read pairs were used for draft genome assembly, MLST analysis and mutation screening in the pmrA/B, phoP/Q, and mgrB genes. Kae1177-1bg demonstrated high-level resistance to colistin, resistance to 3rd generation cephalosporins and susceptibility to all other antibiotics tested. In our strain a CMY-2-type class C cephalosporinase was the only β-lactamase identified. No mobile colistin resistance (mcr) genes were detected. A total of three missense variants in the genes for the two-component PmrA/PmrB system were identified. Two of them were located in the pmrB (pR57K and pN275K) and one in the pmrA gene (pL162M). The pN275K variant emerged as the most likely cause for colistin resistance because it affected a highly conservative position and was the only nonconservative amino acid substitution. In conclusion, to the best of our knowledge, this is the first documented clinical case of a high-level colistin-resistant K. aerogenes in Bulgaria and the first identification of the nonconservative amino acid substitution pN275K worldwide. Colistin-resistant Gram-negative pathogens of ESKAPE group are serious threat to public health and should be subjected to infection control stewardship practices.
Heterosynaptic plasticity in biomembrane memristors controlled by pH
Authors: McClintic William T. , Scott Haden L. , Moore Nick , Farahat Mustafa , Maxwell Mikayla , Schuman Catherine D. , Bolmatov Dima , Barrera Francisco N. , Katsaras John , Collier C. Patrick 
Published: August 2022

Abstract
In biology, heterosynaptic plasticity maintains homeostasis in synaptic inputs during associative learning and memory, and initiates long-term changes in synaptic strengths that nonspecifically modulate different synapse types. In bioinspired neuromorphic circuits, heterosynaptic plasticity may be used to extend the functionality of two-terminal, biomimetic memristors. In this article, we explore how changes in the pH of droplet interface bilayer aqueous solutions modulate the memristive responses of a lipid bilayer membrane in the pH range 4.97–7.40. Surprisingly, we did not find conclusive evidence for pH-dependent shifts in the voltage thresholds (V*) needed for alamethicin ion channel formation in the membrane. However, we did observe a clear modulation in the dynamics of pore formation with pH in time-dependent, pulsed voltage experiments. Moreover, at the same voltage, lowering the pH resulted in higher steady-state currents because of increased numbers of conductive peptide ion channels in the membrane. This was due to increased partitioning of alamethicin monomers into the membrane at pH 4.97, which is below the pKa (~5.3–5.7) of carboxylate groups on the glutamate residues of the peptide, making the monomers more hydrophobic. Neutralization of the negative charges on these residues, under acidic conditions, increased the concentration of peptide monomers in the membrane, shifting the equilibrium concentrations of peptide aggregate assemblies in the membrane to favor greater numbers of larger, increasingly more conductive pores. It also increased the relaxation time constants for pore formation and decay, and enhanced short-term facilitation and depression of the switching characteristics of the device. Modulating these thresholds globally and independently of alamethicin concentration and applied voltage will enable the assembly of neuromorphic computational circuitry with enhanced functionality.

Impact statement
We describe how to use pH as a modulatory “interneuron” that changes the voltage-dependent memristance of alamethicin ion channels in lipid bilayers by changing the structure and dynamical properties of the bilayer. Having the ability to independently control the threshold levels for pore conduction from voltage or ion channel concentration enables additional levels of programmability in a neuromorphic system. In this article, we note that barriers to conduction from membrane-bound ion channels can be lowered by reducing solution pH, resulting in higher currents, and enhanced short-term learning behavior in the form of paired-pulse facilitation. Tuning threshold values with environmental variables, such as pH, provide additional training and learning algorithms that can be used to elicit complex functionality within spiking neural networks.

Graphical abstract