bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fixed point of some Markov operator of Frobenius-Perron type generated by a random family of point-transformations in ℝ
d
Authors: Bugiel Peter , Wędrychowicz Stanisław , Rzepka Beata 
Published: January 2021

Abstract
Existence of fixed point of a Frobenius-Perron type operator P : L
1 ⟶ L
1 generated by a family {φy
}
y∈Y
of nonsingular Markov maps defined on a σ-finite measure space (I, Σ, m) is studied. Two fairly general conditions are established and it is proved that they imply for any g ∈ G = {f ∈ L
1 : f ≥ 0, and ∥f∥ = 1}, the convergence (in the norm of L
1) of the sequence

{

P

j

g

}

j
=
1

∞

$\begin{array}{}
\{P^{j}g\}_{j = 1}^{\infty}
\end{array} $

to a unique fixed point g
0. The general result is applied to a family of C
1+α
-smooth Markov maps in ℝ
d
.
Energy management for series-production plug-in-hybrid electric vehicles based on predictive DP-PMP
Authors: Schmid Roland , Buerger Johannes , Bajcinca Naim 
Published: January 2021

Abstract
This paper presents an energy management strategy for parallel plug-in-hybrid electric vehicles which combines Dynamic Programming (DP) and Pontryagin’s Minimums Principle (PMP). In particular, this paper focusses on the practical challenges encountered in series-production vehicles and develops corresponding extensions: First, the paper considers the effects of uncertain prediction data received from a navigation unit. Secondly, we consider engine starting costs in the DP-PMP framework and thirdly, we allow to constrain the engine state (on/off) in certain parts of the driving cycle. These three components are integrated into a unified DP-PMP framework. Simulation studies demonstrate the practical benefit of the algorithm and show close to optimal performance in terms of fuel consumption. At the same time the algorithm is computationally cheap and allows real-time operation on series-production ECUs.
Steer-by-Wire: Eine analytische Beurteilung von unterschiedlichen Zahnstangenkraftschätzungen im Fahrzeug
Authors: Schäfer Johannes , Leidhold Roberto 
Published: January 2021

Zusammenfassung
Die genaue Kenntnis der Zahnstangenkraft ist in einem Steer-by-Wire-Fahrzeug unablässlich, um dem Fahrer am entkoppelten Handaktuator ein realistisches Gefühl über die Fahrbahnbeschaffenheit zu generieren. Aus wirtschaftlichen Gründen wird oftmals auf eine Schätzung zurückgegriffen. Mögliche Ansätze werden in dieser Untersuchung aufgegriffen, ihre Tauglichkeit analysiert, steuergerättauglich in Fixpoint modelliert, Programmlaufzeiten auf einem Entwicklerboard ermittelt, auf einem Steer-by-Wire-Steuergerät implementiert und ihre Genauigkeiten im Fahrzeug nachgewiesen.
Gedanken zur Auffrischung des musikbibliothekarischen Profils in Corona-Zeiten
Authors: Drotleff Petra 
Published: January 2021

Zusammenfassung
Musikbibliotheken haben vor allem bei jungen Menschen mit Attraktivitätsfragen zu kämpfen, durch den Ausbruch des Corona-Virus hat sich die Lage weiter verschärft. Im Rahmen der Pandemie wird die Bibliothek als Dritter Ort vielerorts auf ihr ursprüngliches Kernprofil der Ausleihe und Rückgabe zurückgetrimmt, aber es gehen von der anderen Seite auch die Benutzerzahlen zurück. Ein weiteres Thema ist der Trend zum Digitalen und wie er sich in Bibliotheken derzeit niederschlägt. Der Aufsatz will Anregungen zu zeitgemäßen Raumkonzepten und dem Umgang mit analogen versus digitalen Medien geben. Nicht zuletzt kommt die Rede auf die Stärkung des Profils durch Kollaborationen.
Abteilungsübergreifende Arbeitsbereiche in der Medienbearbeitung
Authors: Thomas Linda 
Published: January 2021

Zusammenfassung
Im Dezernat Medienbearbeitung der Universitätsbibliothek Potsdam wurden im Rahmen einer Evaluation sieben Kernprozesse definiert. Auf Basis dieser wurden erstmals zentrale Arbeitsbereiche erhoben, beschrieben und dokumentiert. Dabei stand der medienneutrale Geschäftsgang im Fokus der Neuausrichtung. Der Artikel thematisiert die zentralen Erkenntnisse der letzten fünf Jahre und gibt einen Überblick zur aktuellen Struktur.
Spartenübergreifend ins neue Jahrzehnt: Die Bibliothek des Kreisarchivs Warendorf
Authors: Langewand Knut 
Published: January 2021

Zusammenfassung
Die Bibliothek des Kreisarchivs Warendorf erfüllt als wissenschaftliche, lokale und Dienstbibliothek eine dreifache Rolle. Aufgrund des Charakters des Kreisarchivs als kommunales Zentralarchiv sammelt seine Bibliothek Medien zur Geschichte und Gegenwart aller 13 Kommunen des Kreises. Die 2020 abgeschlossene, spartenübergreifende Kooperation mit der Stadtbücherei Warendorf und der Umstieg auf eine Open Source-Bibliothekssoftware haben einen Impuls für eine bessere Vernetzung und größere öffentliche Sichtbarkeit der Kreisarchivbibliothek gegeben.
LncRNA PVT1 promotes cervical cancer progression by sponging miR-503 to upregulate ARL2 expression
Authors: Liu Weiwei , Yao Dongmei , Huang Bo 
Published: January 2021

Abstract
Cervical cancer (CC) is a huge threat to the health of women worldwide. Long non-coding RNA plasmacytoma variant translocation 1 gene (PVT1) was proved to be associated with the development of diverse human cancers, including CC. Nevertheless, the exact mechanism of PVT1 in CC progression remains unclear. Levels of PVT1, microRNA-503 (miR-503), and ADP ribosylation factor-like protein 2 (ARL2) were measured by quantitative reverse transcription-polymerase chain reaction or western blot assay. 3-(4,5)-Dimethylthiazole-2-y1)-2,5-biphenyl tetrazolium bromide (MTT) and flow cytometry were used to examine cell viability and apoptosis, respectively. For migration and invasion detection, transwell assay was performed. The interaction between miR-503 and PVT1 or ARL2 was shown by dual luciferase reporter assay. A nude mouse model was constructed to clarify the role of PVT1 in vivo. PVT1 and ARL2 expressions were increased, whereas miR-503 expression was decreased in CC tissues and cells. PVT1 was a sponge of miR-503, and miR-503 targeted ARL2. PVT1 knockdown suppressed proliferation, migration, and invasion of CC cells, which could be largely reverted by miR-503 inhibitor. In addition, upregulated ARL2 could attenuate si-PVT1-mediated anti-proliferation and anti-metastasis effects on CC cells. Silenced PVT1 also inhibited CC tumor growth in vivo. PVT1 knockdown exerted tumor suppressor role in CC progression via the miR-503/ARL2 axis, at least in part.
Effect of caffeine on the growth and photosynthetic efficiency of marine macroalgae
Authors: Gray Ira , Green-Gavrielidis Lindsay A. , Thornber Carol 
Published: January 2021

Abstract
Caffeine is present in coastal environments worldwide and there is a need to assess its impact on marine organisms. Here, we exposed two species of ecologically important marine macroalgae (Chondrus crispus and Codium fragile subsp. fragile) to a suite of caffeine concentrations and measured their response. Caffeine concentrations of 10–100 ng L−1 had no significant effect on the growth rate or photosynthetic efficiency of either algae. Extremely high concentrations (100–200 mg L−1), which may occur acutely, produced sublethal effects for both species and mortality in C. fragile subsp. fragile. Our results highlight the need to understand how caffeine impacts marine species.
Natural mapping between voice commands and APIs
Authors: Sulír Matúš , Porubän Jaroslav 
Published: January 2021

Abstract
After a voice control system transforms audio input into a natural language sentence, its main purpose is to map this sentence to a specific action in the API (application programming interface) that should be performed. This mapping is usually specified after the API is already designed. In this paper, we show how an API can be designed with voice control in mind, which makes this mapping natural. The classes, methods, and parameters in the source code are named and typed according to the terms expected in the natural language commands. When this is insufficient, annotations (attribute-oriented programming) are used to define synonyms, string-to-object maps, or other properties. We also describe the mapping process and present a preliminary implementation called VCMapper. In its evaluation on a third-party dataset, it was successfully used to map all the sentences, while a large portion of the mapping was performed using only naming and typing conventions.
A binary Bird Swarm Optimization based load balancing algorithm for cloud computing environment
Authors: Mishra Kaushik , Majhi Santosh Kumar 
Published: January 2021

Abstract
Task scheduling and load balancing are a concern for service providers in the cloud computing environment. The problem of scheduling tasks and balancing loads in a cloud is categorized under an NP-hard problem. Thus, it needs an efficient load scheduling algorithm that not only allocates the tasks onto appropriate VMs but also maintains the trade-off amidst VMs. It should keep an equilibrium among VMs in a way that reduces the makespan while maximizing the utilization of resources and throughput. In response to it, the authors propose a load balancing algorithm inspired by the mimicking behavior of a flock of birds, which is called the Bird Swarm Optimization Load Balancing (BSO-LB) algorithm that considers tasks as birds and VMs as destination food patches. In the considered cloud simulation environment, tasks are assumed to be independent and non-preemptive. To evaluate the efficacy of the proposed algorithm under real workloads, the authors consider a dataset (GoCJ) logged by Goggle in 2018 for the execution of cloudlets. The proposed algorithm aims to enhance the overall system performance by reducing response time and keeping the whole system balanced. The authors have integrated the binary variant of the BSO algorithm with the load balancing method. The proposed technique is analyzed and compared with other existing load balancing algorithms such as MAX-MIN, RASA, Improved PSO, and other scheduling algorithms as FCFS, SJF, and RR. The experimental results show that the proposed method outperforms when being compared with the different algorithms mentioned above. It is noteworthy that the proposed approach illustrates an improvement in resource utilization and reduces the makespan of tasks.
Design of an environmentally friendly fuel based on a synthetic composite nano-catalyst through parameter estimation and process modeling
Authors: Jarullah Aysar T. , Muhammed Sarmad K. , Al-Tabbakh Ban A. , Mujtaba Iqbal M. 
Published: January 2021

Abstract
In this paper, oxidative desulfurization (ODS) process is studied for the purpose of removing the sulfur components from light gas oil (LGO) via experimentation and process modeling. A recently developed (by the authors) copper and nickel oxide based composite nano-catalyst is used in the process. The ODS experiments are conducted in a batch reactor and air is used as an oxidizer under moderate operation conditions. Determination of the kinetic parameters with high accuracy is necessary of the related chemical reactions to develop a helpful model for the ODS operation giving a perfect design of the reactor and process with high confidence. High conversion of 92% LGO was obtained under a reaction temperature of 413 K and reaction time of 90 min for synthesized Cu Ni /HY nano-catalyst. Here model based optimization technique incorporating experimental data is used to estimate such parameters. Two approaches (linear and non-linear) are utilized to estimate the best kinematic parameters with an absolute error of less than 5% between the predicted and the experimental results. An environmentally friendly fuel is regarded the main goal of this study, therefore the optimization process is then employed utilizing the validated model of the prepared composite nano-catalyst to get the optimal operating conditions achieving maximum conversion of such process. The results show that the process is effective in removing more than 99% of the sulfur from the LGO resulting in a cleaner fuel.
A diachronic analysis of the FIRE character
Authors: Huang Danqing , Geeraerts Dirk , Zhang Weiwei 
Published: January 2021

AbstractChinese radicals are the semantic components of Chinese characters that generally indicate major concepts and categories. Characters that share the same radical may be semantically linked in various ways to the broad semantic category that the radical represents, and radicals may thus be considered a categorization mechanism to distinguish lexical meanings. Given the fact that FIRE is an independent character that can also be used as a radical in composite characters, the question arises as to what extent the semantic developments of the FIRE character and the FIRE radical are similar, i.e. does the FIRE radical develop independently of the FIRE character? Against the background of this question, this paper studies the diachronic semantic structure of the FIRE character, which will be compared to the FIRE radical in composite characters in follow-up studies. The analysis shows that the overall diachronic development of the FIRE character exhibits prototypical characteristics and a radial network structure.
Delayed treatment of bacteremia during the COVID-19 pandemic
Authors: Miyagami Taiju , Uehara Yuki , Harada Taku , Watari Takashi , Shimizu Taro , Nakamura Ayako , Ogura Naoya , Kushiro Seiko , Masuyama Katsutoshi , Kanai Yoshinori , Yang Kwang-Seok , Naito Toshio 
Published: January 2021

Abstract

Objectives
Coronavirus disease (COVID-19) blindness, that is, the excessive consideration of the disease in diagnosis, has reportedly led to delayed diagnosis of some diseases. We compared several clinical measures between patients admitted for bacteremia during the two months of the COVID-19 pandemic and those admitted during the same period in 2019. We hypothesized that the pandemic has led to delayed treatment of bacteremia.

Methods
This retrospective observational study compared several measures undertaken for patients who visited the emergency unit in two hospitals between March 1 and May 31, 2020, during the COVID-19 pandemic and whose blood cultures tested positive for bacteremia with those for corresponding patients treated during the same period in 2019. The primary measure was time from consultation to blood culture/antimicrobials.

Results
We included 29 eligible patients from 2020 and 26 from 2019. In 2020, the time from consultation to antimicrobial administration was significantly longer than in 2019 (mean [range], 222 [145–309] min vs. 139 [102–179] min, p=0.002). The frequency of chest computed tomography (CT) was significantly higher in 2020 (96.6 vs. 73.1%, p=0.021). Significant differences were not observed in the time to blood culture or chest CT preceding the blood culture between the two periods.

Conclusions
Our findings suggested that due to the COVID-19 epidemic/pandemic, focusing on the exclusion of its infection using CT scans leads to an overall delay in the diagnosis and treatment of bacteremia. Medical providers must be aware of COVID-19 blindness and evaluate patients objectively based on rational criteria and take appropriate action.
Fabrication of N-halamine polyurethane films with excellent antibacterial properties
Authors: Peng Panpan , Yang Jianjun , Wu Qingyun , Wu Mingyuan , Liu Jiuyi , Zhang Jianan 
Published: January 2021

Abstract
An N-halamine precursor, namely, 2-amino-5-(2-hydroxyethyl)-6-methylpyrimidin-4-one (AHM), was used as a chain extender in the preparation of a series of N-halamine polyurethane (PU) films, in order to also instill antibacterial properties. The mechanical properties, thermodynamic performance, and antimicrobial performance of the functionalized PU films were systematically studied. The results showed that the addition of AHM could improve the thermodynamic and mechanical properties of the developed PU films. Conducting tests in the presence of Escherichia coli and Staphylococcus aureus as the model microorganisms revealed that prior to chlorination the antibacterial properties of the chlorinated PU-AHM-Cl films improved significantly relative to the analogous films. The excellent antibacterial properties and the overall superior performance of the PU-AHM-Cl films allow their potential application in microbiological protection materials and related fields.
Weighted boundedness of multilinear Calderón commutators
Authors: Chen Yanping , Han Xueting 
Published: January 2021

Abstract
The main result of this paper is to give that if

b
∈

Lip
⁡

(

ℝ
n

)

{b\in\operatorname{Lip}(\mathbb{R}^{n})}

,

h
j

∈

BMO
⁡

(

ℝ
n

)

{h_{j}\in\operatorname{BMO}(\mathbb{R}^{n})}

,

j
=

1
,
…
,
k

{j=1,\ldots,k}

,

k
∈

ℤ
+

{k\in\mathbb{Z}^{+}}

and

w
∈

A
p

{w\in A_{p}}

,

1
<
p
<
∞

{1<p<\infty}

, then the multilinear Calderón commutators

T

Ω
,
b
,

h
→

{T_{\Omega,b,\vec{h}}}

with variable kernels are bounded on

L
p

⁢

(
w
)

{L^{p}(w)}

. In addition, the authors extend the above result to the Morrey space.
A non-commutative differential module approach to Alexander modules
Authors: Kontogeorgis Aristides , Paramantzoglou Panagiotis 
Published: January 2021

Abstract
The theory of R. Crowell on derived modules is approached within the theory of non-commutative differential modules. We also seek analogies to the theory of cotangent complex from differentials in the commutative ring setting. Finally, we give examples motivated from the theory of Galois coverings of curves.
Helicoidal surfaces with prescribed curvatures in a conformally flat 3-space
Authors: Lee Chul Woo , Lee Jae Won , Yoon Dae Won 
Published: January 2021

Abstract
In this paper, we study a conformally flat 3-space

𝔽
3

{\mathbb{F}_{3}}

which is an Euclidean 3-space with a conformally flat metric
with the conformal factor

1

F
2

{\frac{1}{F^{2}}}

, where

F
⁢

(
x
)

=

e

-

x
1
2

-

x
2
2

{F(x)=e^{-x_{1}^{2}-x_{2}^{2}}}

for

x
=

(

x
1

,

x
2

,

x
3

)

∈

ℝ
3

{x=(x_{1},x_{2},x_{3})\in\mathbb{R}^{3}}

.
In particular, we construct all helicoidal surfaces in

𝔽
3

{\mathbb{F}_{3}}

by solving the second-order non-linear ODE with extrinsic curvature and
mean curvature functions. As a result, we give classification of minimal helicoidal surfaces as well as
examples for helicoidal surfaces with some extrinsic curvature and mean curvature functions in

𝔽
3

{\mathbb{F}_{3}}

.
Effect of CaO on catalytic combustion of semi-coke
Authors: Kou Luyao , Tang Junjing , Hu Tu , Zhou Baocheng , Yang Li 
Published: January 2021

Abstract
Generally, adding a certain amount of an additive to pulverized coal can promote its combustion performance. In this paper, the effect of CaO on the combustion characteristics and kinetic behavior of semi-coke was studied by thermogravimetric (TG) analysis. The results show that adding proper amount of CaO can reduce the ignition temperature of semi-coke and increase the combustion rate of semi-coke; with the increase in CaO content, the combustion rate of semi-coke increases first and then decreases, and the results of TG analysis showed that optimal addition amount of CaO is 2 wt%. The apparent activation energy of CaO with different addition amounts of CaO was calculated by Coats–Redfern integration method. The apparent activation energy of semi-coke in the combustion reaction increases first and then decreases with the increase in CaO addition. The apparent activation energies of different samples at different conversion rates were calculated by Flynn–Wall–Ozawa integral method. It was found that the apparent activation energies of semi-coke during combustion reaction decreased with the increase in conversion.
The future of humanity
Authors: Ejiofor Promise Frank 
Published: January 2021

Abstract
With the recent advancements in scientific comprehension of genetics and the decipherment of complex techniques for editing human genomes, liberal eugenics—eugenic ideal premised on the liberal values of autonomy and pluralism that leaves reproductive choices to parents rather than anachronistic statist authoritarian interventions—has inevitably become a polarising conundrum in contemporary liberal societies as to its utility and destructiveness. Focusing on one species of liberal eugenics—namely, genome editing interventions—I contend that liberal eugenics could be harmful—harm herein construed as that which undermines the salient liberal values of equality, autonomy, and pluralism—since it is itself antithetical to the bases of the liberal society. This contention is based upon three premises: first, that individuals are rather seldom rational decision-makers such that leaving all reproductive choices to the whims of individual parents would be immensely counterproductive to future offspring’s right to open future; second, that liberal eugenics—much like its authoritarian antecedent—could intersect with myriad identities, including race, class, sex, disability, and sexual orientation in ways that might exacerbate social divisions, marginalise different groups, and engender homogeneity; and third, that it undermines individual autonomy of the future person as a member of the liberal community, particularly if their capacities and abilities are tailored to fit parents’ specific life projects and putatively reasonable conceptions of the good. The underscored potential malaises of liberal eugenics should, I argue, be discursively negotiated between parents and the state via the development of robust general laws that regulate heritable genome editing interventions to ensure that the welfare of the future persons is prioritised and that the liberal commitment to autonomy is immune to antiliberal perversions.
Ethical aspects of dying and death in clinical practice in anaesthesiology and intensive medicine departments
Authors: Firment Jozef , Bednár Marián 
Published: January 2021

Abstract
In clinical practice, modern medicine, especially intensive medicine, has made outstanding technological progress that has changed diagnostic and therapeutic paradigms. Nowadays, some patients for whom there were no treatments in the past not only survive but return to active life thanks to intensive medicine. However, in some cases intensive care will not help patients in a critical condition and merely prolong death. In such situations, the treatment is terminated or not extended, and the patient is allowed to die in dignity. In this specific situation all intensive procedures are terminated. Palliative care is the next stage. This is a sensitive issue that should be discussed with healthcare professionals and experts from other areas of life to ensure it is communicated appropriately to patients and their relatives.
Consensus and majoritarian democracies: Problems with under-informed single-level analyses
Authors: Ani Emmanuel Ifeanyi 
Published: January 2021

Abstract
I argue that when conceiving or assessing normative ideas about how we should organize society into the kind of ecosystem we desire, it is unwise to completely ignore empirical conditions. I also demonstrate that when evaluating empirical difficulties attending a social system, it is also unwise to do so in total oblivion to the normative idea or objective informing the establishment of such a system. Each of these assessments I call an under informed single-level analysis. By contrast I advocate a multi-level analysis (by which we evaluate both the normative and empirical dimensions of an idea or a social system) or, at the least, an informed single-level analysis (by which we evaluate either a normative idea or an empirical system with an implicit awareness of the content of the other level). I demonstrate that these models of analysis would never yield the same conclusions as an under informed single-level analysis. For my case studies I focus on the various models of analyses used in the debate about liberal majoritarian and consensus/communal democracies.