bluuebunny/crossref_metadata_2025_split huggingface dataset:
Genomic and protein structure modelling analysis depicts the origin and pathogenicity of 2019-nCoV, a new coronavirus which caused a pneumonia outbreak in Wuhan, China
Authors: Dong Ning , Yang Xuemei , Ye Lianwei , Chen Kaichao , Chan Edward Wai-Chi , Yang Mengsu , Chen Sheng 
Published: February 2020

Background: A pandemic outbreak caused by a novel coronavirus, 2019-nCoV, has originated from Wuhan, China and spread to many countries around the world. The outbreak has led to around 45 thousand cases and over one thousand death so far. Methods: Phylogenetic analysis and sequence alignment were used to align the whole genome sequence of 2019-nCoV with other over 200 sequences of coronaviruses to predict the origin of this novel virus. In addition, protein modeling and analysis were performed to access the potential binding of the spike protein of 2019-nCoV with human cell receptor, angiotensin-converting enzyme 2 (ACE2). Results: Detailed genomic and structure-based analysis of a new coronavirus, namely 2019-nCoV, showed that the new virus is a new type of bat coronavirus and is genetically fairly distant from the human SARS coronavirus. Structure analysis of the spike (S) protein of this new virus showed that its S protein only binds much weaker to the ACE2 receptor on human cells whereas the human SARS coronavirus exhibits strongly affinity to the ACE receptor. Conclusions: These findings suggest that the new virus should theoretically not be able to cause very serious human infection when compared to human SARS virus. However, the lower pathogenicity of this new virus may lead to longer incubation time and better adaption to human, which may favor its efficient transmission in human. These data are important to guide design of infection control policy and inform the public on the nature of threat imposed by 2019-nCov. Most importantly, using the analysis platform that we have developed, we should be able to predict whether the new mutations could lead to the increase of infectivity of the mutated virus in a very short time.
A protocol for an observational cohort study of heat strain and its effect on fetal wellbeing in pregnant farmers in The Gambia
Authors: Bonell Ana , Hirst Jane , Vicedo-Cabrera Ana M. , Haines Andy , Prentice Andrew M. , Maxwell Neil S. 
Published: February 2020

Introduction: Climate change predictions indicate that global temperatures are likely to exceed those seen in the last 200,000 years, rising by around 4°C above pre-industrial levels by 2100 (without effective mitigation of current emission rates). In regions of the world set to experience extreme temperatures, women often work outside in agriculture even during pregnancy. The implications of heat strain in pregnancy on maternal health and pregnancy outcome are not well understood. This protocol describes a study to assess the physiological response of pregnant women to environmental heat stress and the immediate effect this has on fetal wellbeing. Methods and analysis: The study will be performed in West Kiang district, The Gambia; a semi-arid zone in West Africa with daily maximum temperatures ranging from approximately 32 to 40°C. We will recruit 125 pregnant women of all ages who perform agricultural work during their pregnancy. Participants will be followed every two months until delivery. At each study visit fetal growth will be measured by ultrasound scan. During the course of their working day we will take the following measurements: continuous maternal physiological measurements (heart rate, respiratory rate, chest skin temperature and tri-axis accelerometer data); intermittent maternal tympanic core temperature, four point skin temperature, blood pressure; intermittent fetal heart rate and, if eligible, umbilical artery doppler; intermittent environmental measurements of air temperature, humidity, solar radiation and wind speed. Venous blood and urine will be collected at beginning and end of day for biomarkers of heat strain or fetal distress and hydration status.
A FORMAÇÃO DO PROFESSOR PESQUISADOR NOS CURSOS DE LICENCIATURA DA UERJ/CEDERJ: O LUGAR E A IMPORTÂNCIA DA PESQUISA NO CURSO DE FORMAÇÃO EM LICENCIATURA EM GEOGRAFIA DA UERJ/CEDERJ NO SISTEMA SEMIPRESENCIAL
Authors: Marafon Glaucio José , Araújo José Silvan Borborema , Teófilo Vanilda Maria Santos 
Published: February 2020

O presente trabalho tem como objetivo apresentar um panorama de como o conhecimento produzido nas diferentes disciplinas do curso de Licenciatura em Geografia da UERJ/CEDERJ, modalidade semipresencial, propicia a construção de um professor pesquisador focada na relação teoria-prática, dispondo de elementos facilitadores que permitem que esse profissional se torne um produtor de conhecimento. Assim, tomamos como ponto de partida alguns aspectos teóricos do processo de formação de professores na licenciatura e a concepção de professor reflexivo (SCHON, 1990). A partir de atividades oferecidas aos alunos do curso de licenciatura – Seminários de Pesquisa e curso de Técnicas de Pesquisa –, acreditando serem estas relevantes no processo de construção de uma consciência sobre suas práticas futuras, foi feita uma sondagem com os alunos dos polos onde o curso de Geografia é ministrado, com o intuito de verificar até que ponto o curso vem propiciando a formação de um professor pesquisador.
m-NIL-CLEAN COMPANION MATRICES
Authors: Cîmpean Andrada 
Published: February 2020

Companion matrices over fields of prime characteristic, p, that are sums of two idempotents and a nilpotent are characterized in terms of dimension and trace of such a matrix and of p. Companion matrices over fields of positive characteristic, p, that are sums of m idempotents, m ≥ 2, and a nilpotent are characterized in terms of dimension and trace of such a matrix and of p.
Tridiagonal pairs of type III with height one
Authors: Li Xue , Hou Bo , Gao Suogang 
Published: February 2020

Let K denote an algebraically closed field with characteristic 0. Let V denote a vector space over K with finite positive dimension, and let A, A∗ denote a tridiagonal pair on V of diameter d. Let V0, . . . , Vd denote a standard ordering of the eigenspaces of A on V , and let θ0, . . . , θd denote the corresponding eigenvalues of A. It is assumed that d ≥ 3. Let ρi denote the dimension of Vi. The sequence ρ0, ρ1, . . . , ρd is called the shape of the tridiagonal pair. It is known that ρ0 = 1 and there exists a unique integer h (0 ≤ h ≤ d/2) such that ρi−1 < ρi for 1 ≤ i ≤ h, ρi−1 = ρi for h < i ≤ d − h, and ρi−1 > ρi for d − h < i ≤ d. The integer h is known as the height of the tridiagonal pair. In this paper, it is showed that the shape of a tridiagonal pair of type III with height one is either 1, 2, 2, . . ., 2, 1 or 1, 3, 3, 1. In each case, an interesting basis is found for V and the actions of A, A∗ on this basis are described.
Optimalisasi Peran Orang Tua Dalam Memahami Remaja Generasi Milenial
Authors: Ernawati . , Fadillah Galih Fajar , Khairi Alfin Miftahul 
Published: February 2020

Abstrak: Latar belakang penelitian ini adalah masih adanya relasi yang kurang harmonis antara orang tua dan anak, hal tersebut berdampak signifikan pada sekat emosional yang ada. Terlebih lagi tantangan dalam memahami remaja generasi milenial masa kini. Orang tua sebagai orang yang pertama kali dikenal oleh remaja hendaknya dapat menjadi teladan yang baik, memberikan dukungan pada remaja serta diharapkan orang tua dapat memahami remaja, tidak hanya kebutuhan fisik tentunya namun kebutuhan psikologis dan kebutuhan agama. Kasus-kasus yang beredar di media surat kabar dan media online saat ini sungguh sangat memprihatinkan. Tidak jarang orangtua dengan tega bertindak kasar, bahkan sampai menghabisi nyawa buah hatinya. Tujuan penelitian ini adalah untuk mendeskripsikan tentang optimalisasi peran orang tua dalam memahami remaja generasi milenial. Penelitian ini bersifat kualitatif terapan (applied qualitative research) dan menggunakan pendekatan Interpretative Phenomenology Analysis (IPA), teknik pengumpulan data menggunakan wawancara dan obersvasi serta dokumentasi. setelah data terkumpul kemudian dianalisis dengan analisis deskriptif. Hasil penelitian ini menunjukkan pentingnya optimalisasi peran orang tua dalam memahami remaja generasi milenial. Optimalisasi peran orang tua dikelompokkan dalam 4 kategori yaitu optimalisasi dalam peran pemenuhan kebutuhan ekonomi, fisik, psikologis, dan agama.Kata kunci : peran orang tua, generasi milenial
Elliptic Equations with Hardy Potential and Gradient-Dependent Nonlinearity
Authors: Gkikas Konstantinos T. , Nguyen Phuoc-Tai 
Published: February 2020

Abstract
Let

Ω
⊂

ℝ
N

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

(

N
≥
3

{N\geq 3}

) be a

C
2

{C^{2}}

bounded domain, and let δ be the distance to

∂
⁡
Ω

{\partial\Omega}

. We study equations

(

E
±

)

{(E_{\pm})}

,

-

L
μ

⁢
u

±

g
⁢

(
u
,

|

∇
⁡
u

|

)

=
0

{-L_{\mu}u\pm g(u,\lvert\nabla u\rvert)=0}

in Ω, where

L
μ

=

Δ
+

μ

δ
2

{L_{\mu}=\Delta+\frac{\mu}{\delta^{2}}}

,

μ
∈

(
0
,

1
4

]

{\mu\in(0,\frac{1}{4}]}

and

g
:

ℝ
×

ℝ
+

→

ℝ
+

{g\colon\mathbb{R}\times\mathbb{R}_{+}\to\mathbb{R}_{+}}

is nondecreasing and locally Lipschitz in its two variables with

g
⁢

(
0
,
0
)

=
0

{g(0,0)=0}

. We prove that, under some subcritical growth assumption on g, equation

(

E
+

)

{(E_{+})}

with boundary condition

u
=
ν

{u=\nu}

admits a solution for any nonnegative bounded measure on

∂
⁡
Ω

{\partial\Omega}

, while equation

(

E
-

)

{(E_{-})}

with boundary condition

u
=
ν

{u=\nu}

admits a solution provided that the total mass of ν is small. Then we analyze the model case

g
⁢

(
s
,
t
)

=

|
s
|

p

⁢

t
q

{g(s,t)=\lvert s\rvert^{p}t^{q}}

and obtain a uniqueness result, which is even new with

μ
=
0

{\mu=0}

. We also describe isolated singularities of positive solutions to

(

E
+

)

{(E_{+})}

and establish a removability result in terms of Bessel capacities. Various existence results are obtained for

(

E
-

)

{(E_{-})}

. Finally, we discuss existence, uniqueness and removability results for

(

E
±

)

{(E_{\pm})}

in the case

g
⁢

(
s
,
t
)

=

|
s
|

p

+

t
q

{g(s,t)=\lvert s\rvert^{p}+t^{q}}

.
Study on online soft sensor method of total sugar content in chlorotetracycline fermentation tank
Authors: Sun Yu-mei , Han Xiang , Zhang Dong-xiang , Sun Qiao-yan , Chen Xiang-guang , Yao Min-pu , Huang Su-yi , Ma De-shou , Zhou Biao 
Published: February 2020

AbstractIn order to solve the problem that the total sugar content of the chlortetracycline fermentation tank can not be automatically detected online, a prediction method which combines the output recursive wavelet neural network and the Gauss process regression is proposed in this paper. A soft sensor model between the measurable parameters (inputs) and the total sugar content (output) of the chlortetracycline fermentation tank was established. The soft sensor model was trained by self updating algorithm. Based on field data, the accuracy and generalization ability of the soft sensor model were analyzed. It is shown that the prediction accuracy of the combined model proposed in this paper is better than that of other single models. The results demonstrate the superiority of the method, and MRE and RMSE are used to evaluate the performance of the soft sensor model. It shows that the prediction precision of the soft sensor model based on ORWNN-GPR combination is relatively high in the long period of fermentation, and is suitable for on-line prediction of the total sugar content of the chlortetracycline fermentation tank. The soft sensor method can effectively reduce the labor intensity of the analysts and saves the production cost for enterprise.
Service quality of the urban public transport companies and sustainable city logistics
Authors: Chocholac Jan , Sommerauerova Dana , Hyrslova Jaroslava , Kucera Tomas , Hruska Roman , Machalik Stanislav 
Published: February 2020

Abstract
The issue of sustainable city logistics has steadily been developed over the last decades. Urban public transport companies can make a significant contribution to the concept of sustainable city logistics. The customers’ perception and satisfaction regarding urban public transport companies can be associated with the increased use of their services. The preference for urban public transport reduces the use of individual car transport, which is linked to the environmental pillar of sustainability. For the customers, the level of the provided service is very important. The article is focused on the evaluation of the outcomes from the primary research concerning the service quality performed by the urban public transport companies in the Hradec-Pardubice residential agglomeration. The goal lies in identifying gaps in service quality. The method used in this article is representative primary research. The primary research was carried out in the form of structured personal interviews with a representative sample of respondents. Selected statistical methods were used to evaluate the data. The results are discussed in the context of published research studies. Research in this article found that respondents are more satisfied with the quality of services performed by the urban public transport companies, but the perception of individual service quality factors varies from one user group to another. The research also confirms a different perceptions regarding customer care and comfort by different age groups of respondents. The article implies that public transport companies should pay attention to setting fare prices for different groups of passengers.
Logistic regression in modeling and assessment of transport services
Authors: Borucka Anna 
Published: February 2020

AbstractTransport companies operate in a dynamically developing and competitive market. Maintaining the already held position and further expansion requires adjusting the level of services provided to the needs and requirements of customers, as well as continuous surveying, monitoring and adjusting the implemented strategy. There are different methods for such an analysis. This article proposes logistic regression. The research was conducted on the basis of a distribution and trade company dealing with the supply of automotive spare parts. As the most profitable group of customers are local car repair shops, it was this group that was subject to analysis.The quality of service assessment was considered from the point of view of delivery time. The dichotomous form of the predictor taking two values - late and on-time delivery - was determined. From among the possible ones, regressors whose influence was statistically significant and whose modification was possible were selected. The research showed which of them (and how strongly) affect the dependent variable, which allowed for modification of strategy and implementation of new solutions increasing the number of satisfied customers.
La langue polynomique, le concept phare de l’appareil critique corse
Authors: Di Meglio Alain 
Published: February 2020

Abstract
This article deals mainly with the notion of polynomie, which has occupied a large place in Corsican studies and in Corsican sociolinguistics. It is argued in this article that this concept developed by the sociolinguist Jean-Baptiste Marcellesi and the process it covers have allowed the emergence of Corsican as a “language”. The aim here is to propose a synthesis that takes the form of an advocacy for a bi-plurilingual societal model potentially better adapted to the Corsican political aspirations. The implications and applications in language didactics or literary production will be discussed in particular.
Schöne neue (Zahlungs-)Welt
Authors: Kindt Torsten , Seidel Sebastian 
Published: February 2020

AbstractDer Beitrag stellt eine leicht abgewandelte Fassung einer Fortgeschrittenenhausarbeit dar, die im Herbst-/Wintersemester 2018 an der Universität Mannheim gestellt wurde. Die Schwerpunkte liegen im Allgemeinen und Besonderen Teil des Schuldrechts. Hierbei werden klassische Problemstellungen (u. a. Gefahrübergang, Anwendungsbereich des Verbrauchsgüterkaufs bei dual use-Gütern und Existenzgründern, Abgrenzung Vertrag und Gefälligkeit, Haftungsprivilegierungen) mit aktuellen Fragen des Erfüllungsrechts im bargeldlosen Zahlungsverkehr (PayPal und SEPA-Basis-Lastschriftverfahren) und einer aufbautechnisch anspruchsvollen Drittschadenskonstellation verbunden.
Non-occurrence of the Lavrentiev phenomenon for a class of convex nonautonomous Lagrangians
Authors: Mariconda Carlo , Treu Giulia 
Published: February 2020

Abstract
We consider the classical functional of the Calculus of Variations of the form

$$\begin{array}{}
\displaystyle
I(u)=\int\limits_{{\it\Omega}}F(x, u(x), \nabla u(x))\,dx,
\end{array}$$
where Ω is a bounded open subset of ℝn and F : Ω × ℝ × ℝn → ℝ is a Carathéodory convex function; the admissible functions u coincide with a prescribed Lipschitz function ϕ on ∂Ω. We formulate some conditions under which a given function in ϕ +
$\begin{array}{}
\displaystyle
W^{1,p}_0
\end{array}$(Ω) with I(u) < +∞ can be approximated in the W1,p norm and in energy by a sequence of smooth functions that coincide with ϕ on ∂Ω. As a particular case we obtain that the Lavrentiev phenomenon does not occur when F(x, u, ξ) = f(x, u) + h(x, ξ) is convex and x ↦ F(x, 0, 0) is sufficiently smooth.
High-performance monolayer MoS2 photodetector enabled by oxide stress liner using scalable chemical vapor growth method
Authors: Li Zhiwen , Wu Jing , Wang Cong , Zhang Han , Yu Wenjie , Lu Youming , Liu Xinke 
Published: February 2020

Abstract
MoS2, as a typical representative of two-dimensional semiconductors, has been explored extensively in applications of optoelectronic devices because of its adjustable bandgap. However, to date, the performance of the fabricated photodetectors has been very sensitive to the surrounding environment owing to the large surface-to-volume ratio. In this work, we report on large-scale, high-performance monolayer MoS2 photodetectors covered with a 3-nm Al2O3 layer grown by atomic layer deposition. In comparison with the device without the Al2O3 stress liner, both the photocurrent and responsivity are improved by over 10 times under 460-nm light illumination, which is due to the tensile strain induced by the Al2O3 layer. Further characterization demonstrated state-of-the-art performance of the device with a responsivity of 16.103 A W−1, gain of 191.80, NEP of 7.96 × 10−15 W Hz−1/2, and detectivity of 2.73 × 1010 Jones. Meanwhile, the response rise time of the photodetector also reduced greatly because of the increased electron mobility and reduced surface defects due to the Al2O3 stress liner. Our results demonstrate the potential application of large-scale strained monolayer MoS2 photodetectors in next-generation imaging systems.
Application of Proper Orthogonal Decomposition Method in Unsteady Flow Field Analysis of Axial High Bypass Fan
Authors: Zhang Kai , Wang A. J. 
Published: February 2020

Abstract
The main purpose of this paper is to analyze the characteristics of the flow field in fan rotor. Nowadays the twisted and swept fan is the representative work of the forefront of aerospace engines. The tip clearance flow field can have a large impact on fan rotor performance. This article describes and uses the throttle method to obtain near stall condition. Near stall condition value simulation of the transonic fan rotor was carried out by CFX. The Proper Orthogonal Decomposition method was applied to the tip flow-field analysis. The main structure of the flow field can be distinguished by Proper Orthogonal Decomposition method. Then the flow structure is sorted according to energy. Disturbing fine flow structures can also be captured. This provides a comparative reference for flow field visualization. It also provides important data for the design of the fan.
Preparation and Application of Palladium Nanoparticle Impregnated Chloromethylated Polysulfone Matrix as an Efficient Catalytic Membrane for Oxidation of Alcohols
Authors: Mahdavi Hossein , Fayyazi Faeze 
Published: February 2020

Abstract
The use of palladium nanoparticles embedded in a chloromethylated Polysulfone (CMPSf) matrix was developed for highly efficient oxidation of primary and secondary alcohols to corresponding aldehyde and ketone in organic solvent free condition. Pd (Π)/bis (2, 4-dihydroxybenzaldehyde) chelate chemically incorporated onto CMPSf was used to prepare beneficial catalytic membranes. Chemical structure and thermal properties of resulting membranes were characterized via FTIR, 1HNMR, UV-vis, TGA and DSC techniques. Morphology and particle distribution throughout the catalytic membranes was elucidated using FE-SEM. An average particle size of Pd nanoparticles was estimated about 20 nm by XRD technique. ICP technique proved that no Pd particles were leached out of the membrane into the solutions; hence the as-prepared catalytic membranes could be used several times without significant loss in their activities. This is in good accordance with formation of chemical bond between Pd and polymer matrix.
The Right Of Ownership Of The Ukrainian People And The Right Of State Ownership Of Natural Objects And Their Resources
Authors: Martyniuk V.A. 
Published: February 2020

The article presents the analysis of the ownership of natural objects and their resources through understanding and correlation of the property rights of the Ukrainian people and the state property rights.
Different scientific approaches to understanding the property rights of the Ukrainian people are analyzed. Emphasizes on the public aspect of the legal regime of property of the Ukrainian people. It is substantiated that the recognition by the legislator of natural objects and natural resources as objects of property of the Ukrainian people confirms and points to the special importance of such objects for the life of the whole society. At the same time, the property of the Ukrainian people was not declared as exclusive. Natural objects and their resources may be public, communal and private property. In our opinion, the thesis about the equivalence of the property rights of the Ukrainian people and the state property rights, which is grounded in separate scientific researches, is not correct. The property rights of the Ukrainian people and the right of state ownership differ in their nature and mechanisms of legislative regulation. The state, as a subject of state ownership of natural objects and their resources, is on an equal footing with other entities. In the article, on the basis of legislative prescriptions, the subjects of exercising the property rights of the Ukrainian people and state property rights are identified. The differences in the system of such entities are indicated.