bluuebunny/crossref_metadata_2025 huggingface dataset:
Functionality and reliability of horizontal control net (Poland)
Authors: Wolski Bogdan , Granek Grzegorz
Published: August 2020

Horizontal control networks established with monuments are functional if the conditions related to the number of control points, their density, condition and stability of coordinates are met. For functionality defined in those terms, deterministic accuracy characteristics are of little use. The subject matter discussed herein includes the two key features of geodetic control points, i.e., usability and stability. Due to the varying properties of those variables and the impact of the operating time of the system, there is no alternative to reliability-based approach in developing the functionality model. The measures of functionality and the procedures of data acquisition for developing the model of the control network destruction process have been defined. The solution presented herein is relevant for geodetic practice, providing a standard procedure for defining the time frame and the scope of the control network upgrading. The identified destruction process model optimizes this task assuming critical states expressed by the functionality probability. The applied approach is an example of the reliability theory-based approach typical for engineering. The issue of simulating the destruction process is illustrated with the results of the tests of class 3 control networks conducted in Kielce and Lodz regions in Poland. As a result of the tests, the characteristic properties of the control network destruction process have been identified. It was also shown how the patterns of usability and accuracy of the geodetic control points are relevant on the stage of implementing investment project tasks.
Pore-scale gas–water flow in rock: Visualization experiment and simulation
Authors: Wu Feng , Yao Cong , Cong Linlin , Xi Yanping
Published: August 2020

The characteristics of pore-scale two-phase flow are of significance to the effective development of oil and gas resources, and visualization has gradually become one of the hot spots in the research of pore-scale two-phase flow. Based on the pore structure of rock, this research proposed a microscopic glass etching displacement experiment and a Navier–Stokes equation based finite element simulation to study the pore-scale gas–water two-phase flow. Then, this research conducted the proposed methods on the type I, type II and type III tight sandstone reservoirs in the Penglaizhen Formation of western Sichuan Basin, China. Results show that the outcomes of both the microscopic glass etching displacement experiment and the finite element simulation are by and large consistent. The water distributed in the large pores is displaced, and the trapped water mainly exists in the area induced by flow around high-permeability pores, perpendicular pores and disconnected ends of pores. The microscopic glass etching displacement experiment is conducive to better observing the phenomenon of a viscous finger-like breakthrough and air jumps in migration flows in narrow throats, while the finite element simulation has the advantages of cost effectiveness, easy operation and strong experimental reproducibility.
Microscopic mechanism of sandstone hydration in Yungang Grottoes, China
Authors: Chen Jiawei , Xu Jinming , Huang Jizhong
Published: August 2020

The macroscopic engineering properties of sandstone are dominated primarily by mineral features in a microscopic scale. This study will investigate the microscopic physical and mechanical properties of the main minerals (quartz, K-feldspar, Na-feldspar and kaolinite) in Yungang Grottoes sandstone, using the molecular mechanics and the molecular dynamics simulations. The microscopic physical properties were represented by density and volume. The microscopic mechanical properties were represented by Young’s modulus and Poisson’s ratio. The microscopic mechanical properties of the minerals in various directions were then explored. The influences of water molecules and the surrounding temperature on the microscopic physical and mechanical properties of the minerals were furthermore investigated. It is found that the differences in the microscopic densities between the simulated results and those from the open data set are, respectively, 0.37%, 1.15% and 9.16%, for the quartz, Na-feldspar and kaolinite cells; the microscopic mechanical properties of various minerals have a significant anisotropy; the Young’s modulus of halloysite decreases by 75.86% compared with that of kaolinite; as the water molecule number increased from 0 to 5, the Young’s moduli of K-feldspar, Na-feldspar and kaolinite cells decreases by 31.31%, 55.05% and 42.60%, respectively; for each mineral, as the temperature increases from 243.15 to 303.15 K under one atmospheric pressure, the volume increases and the density decreases. Those results may have a theoretical significance for the analysis of microscopic mechanism of hydration in the Yungang Grottoes sandstone.
An ABC-optimized fuzzy ELECTRE approach for assessing petroleum potential at the petroleum system level
Authors: Hamzeh Mohamad , Karimipour Farid
Published: August 2020

An inevitable aspect of modern petroleum exploration is the simultaneous consideration of large, complex, and disparate spatial data sets. In this context, the present article proposes the optimized fuzzy ELECTRE (OFE) approach based on combining the artificial bee colony (ABC) optimization algorithm, fuzzy logic, and an outranking method to assess petroleum potential at the petroleum system level in a spatial framework using experts’ knowledge and the information available in the discovered petroleum accumulations simultaneously. It uses the characteristics of the essential elements of a petroleum system as key criteria. To demonstrate the approach, a case study was conducted on the Red River petroleum system of the Williston Basin. Having completed the assorted preprocessing steps, eight spatial data sets associated with the criteria were integrated using the OFE to produce a map that makes it possible to delineate the areas with the highest petroleum potential and the lowest risk for further exploratory investigations. The success and prediction rate curves were used to measure the performance of the model. Both success and prediction accuracies lie in the range of 80–90%, indicating an excellent model performance. Considering the five-class petroleum potential, the proposed approach outperforms the spatial models used in the previous studies. In addition, comparing the results of the FE and OFE indicated that the optimization of the weights by the ABC algorithm has improved accuracy by approximately 15%, namely, a relatively higher success rate and lower risk in petroleum exploration.
The Cretaceous igneous rocks in southeastern Guangxi and their implication for tectonic environment in southwestern South China Block
Authors: Liu Yang , Fang Nianqiao , Qiang Menglin , Jia Lei , Song Chaojie
Published: August 2020

Southeastern Guangxi is located in the southwestern South China Block and to the northwest of the South China Sea (SCS), with abundant records of the Cretaceous magmatism. A detailed study of igneous rocks will contribute to a better understanding of the late Mesozoic tectonic environment. Zircon U–Pb dating yields ages of 93.37 ± 0.43 Ma for Yulin andesites and 107.6 ± 1.2 Ma for Luchuan granites. Yulin andesites are hornblende andesites, of which w(MgO) is between 7.72% and 8.42%, and Mg# is between 66.7 and 68.0, belonging to high magnesian andesites (HMAs) from peridotite sources. Luchuan granites are medium- to fine-grained monzogranites. Monzogranites and clastoporphyritic lava are high-K calc-alkaline series and metaluminum to weakly peraluminous series, which belong to the I-type granites. Those are enriched in Rb, Th, K and LREEs and depleted in Nb, Ta, P and Eu, showing the geochemical characteristics related to subduction. Unlike the contemporary “bimodal igneous rock assemblages” in Zhejiang and Fujian, the intermediate-acid magmatites in the southeastern Guangxi imply the compressive tectonic environment. The assemblage of HMAs and adakitic rocks indicates that the southwestern South China Block was under the Neo-Tethyan subduction during Cretaceous, and slab melting contributed to the magma in this area.
Intergeneric hybidization of sunflower (Helianthus annuus L.) with spiny plumeless thistle (Carduus acanthoides L.)
Authors: Hristova-Cherbadzhi Miroslava
Published: August 2020

Carduus acanthoides L (spiny plumeless thistle) a biannual wild species with 2n = 22 chromosomes was crossed with Helianthus annuus L. When crossing, pollen from C. acanthoides germinated and pollinated the stigmas of sunflower lines HA 89A after 48 h. The crossability rate was low, but seeds and hybrid plants were obtained. The F1 plants strongly resembled the cultivated sunflower with the most important bio-morphological characters, even though they had an intermediate type of heritability. The hybrid nature was confirmed by RAPD markers. The polymorphism between H. annuus, C. acanthoides, and their F1 hybrids was studied using RAPD. The result showed introgression of C. acanthoides in the hybrid progeny. It was established that the wild species carried Rf genes for the CMS PET-1. After self-pollination and sib-pollination of the F1 plants and back-crossing with cultivated sunflower, F2, BC1 and next generation hybrid progenies were obtained. The investigation encompassed the period 2000–2007 and 2014–2018. Some of the new lines have been included in a heterosis breeding program for developing hybrids for the sunflower market.
Periodontal status and bone metabolism in women in reproductive and postmenopausal periods
Authors: Mazur Iryna , Dilbarkhanov Bassymbek , Kuracha Xeniya , Novoshytskyy Volodymyr , Suprunovych Iryna , Zhakipbekov Kairat
Published: August 2020

Objectives

Chronic periodontitis is one of the most common diseases in the world. Periodontitis occurs more frequently in postmenopausal women due to hormonal changes and in patients with osteoporosis. Thus, the aim of our study was to compare levels of alveolar bone loss of mandible and maxilla and bone tissue remodeling markers in women of reproductive and postmenopausal periods.

Methods

Fifty-nine women aged 25–68 years were enrolled in a cross-sectional study and divided into two groups. Group I consisted of 42 women of reproductive age and Group II included 17 women in their postmenopausal period. The level of alveolar bone loss of mandible and maxilla was assessed using dental panoramic radiography, and the level of bone remodeling markers (Beta C-terminal telopeptide of type I collagen [β-CTx] and osteocalcin) was obtained in both groups.

Results

Women in the postmenopausal period have higher level of alveolar bone loss in mandible and maxilla than women of reproductive age. The level of ß-CTx and osteocalcin was significantly higher in Group II, compared to Group I (p=0.002 and p=0.005, respectively).

Conclusions

In postmenopausal women, on the background of significantly higher bone remodeling, an increase of alveolar bone loss of mandible and maxilla was observed.
Detection of coherent groups using measured signals, in an inter-area mode, for creating controlled islands to protect the power system from blackout
Authors: Mandadi Kalyani , Boddeti Kalyan Kumar
Published: August 2020

Controlled islanding is an effective way of preventing the system from catastrophic blackouts. This is generally solved either as a constrained combinatorial optimization problem or a slow coherency based linearized approach. The combinatorial explosion of the solution space of an extensive power network increases the complexity of solving, while the linearized slow coherency approach cannot track the varying coherent generator groups with a change in system operating conditions. Offline coherent studies are utilized in wide area measurement system (WAMS) data-based approaches to determine islanding boundaries. So, the present study proposes a novel coherency based controlled islanding technique that clusters generators and load buses simultaneously from the measured signals, ensuring generator coherency. Therefore, identification of inter-area modes from bus voltage angle signals is necessary to determine coherent bus groups. So, Zolotarev polynomial based filter bank (ZPBFB) is adopted in the present work to determine inter-area modes. The dimensional reduction techniques are used to cluster the coherent buses. The bus clusters thus obtained with the proposed method are compared with bus clusters determined from small signal stability analysis. The proposed method is demonstrated on IEEE 39-bus, 68-bus and 118-bus test systems and compared with graph spectra based controlled islanding.
Experimental control of photovoltaic system using neuro – Kalman filter maximum power point tracking (MPPT) technique
Authors: Boutabba Tarek , Drid Said , Chrifi-Alaoui Larbi
Published: August 2020

This paper proposes a new maximum power point tracking (MPPT) technique of photovoltaic system based on Kalman filter (KF) and associate to Artificial Neural Networks (ANN). The design process of photovoltaic (PV) modules can be greatly enhanced by using advanced and accurate models. Furthermore, the use of a neural model especially for accuracy improvement of the electrical equivalent circuit parameters, where the analytic equation of the model cannot be easily expressed, because the relationship between parameters is nonlinear. The proposed neural network is trained once by using some measured I-V and P-V curves and to keep in account the change of all the parameters at different operating conditions. For that reason, to get the fast tracking performance on this noisy conditions, and to maximize the power of photovoltaic system a KF method have been used. The performance analysis of perturb and observe (P&O) and KF MPPT techniques has been simulated in MATLAB/Simulink software and their model and control schemes has been analyzed and validated.
A cost effective accumulator management system for electric vehicles
Authors: D Suchitra , R Rajarajeswari , Bhati Dhruv Singh
Published: August 2020

An accumulator or battery is an energy storage cramped in an adaptable stockade. Lithium-ion batteries are commonly used in hybrid electric vehicles (HEV) and battery operated electric vehicles (BOEV) due to its eco-friendliness and increased efficiency. To maintain lithium batteries in the safe operating region and also to perform tasks like cell balancing, preventing thermal runaway, maintain the state of health, an effective battery management system (BMS) is required. The BMS should also communicate effectively between host devices and battery packs. This paper proposes a reliable, modular and cost-efficient BMS, which will emanate an alert when a fault occurs and thus preventing the battery from damage. An efficient control strategy has been proposed for charging and discharging of the battery pack. The thermal analysis of the lithium-ion battery used in this work is simulated using battery design studio (BDS) with the inclusion of a self-discharging effect. The proposed hardware setup also provides a provision for on-board diagnosis (OBD) and logging in the accumulator management system (AMS) to constantly monitor the cell parameters like voltage, current, and temperature. The live data display of AMS working is also shown during abnormal and normal conditions. Also, an attempt is made to use the design of proposed AMS for HEV.
Data compression techniques for Phasor Measurement Unit (PMU) applications in smart transmission grid
Authors: Ballal Makarand , Kulkarni Amit , Suryawanshi Hiralal
Published: August 2020

The advances in Wide Area Measurement Systems (WAMS) and deployment of a huge number of phasor measurement units (PMUs) in the grid are generating big data volume. This data can be used for a variety of applications related to grid monitoring, management, operation, protection, and control. With the increase in this data size, the respective storage capacity needs to be enhanced. Also, communication infrastructure readiness remains bottleneck to transfer this big data. One of the probable solutions could be transmitting compressed data. This paper presents techniques for data compression in the smart transmission system using singular values decomposition (SVD) and the eigenvalues decomposition (EVD). The SVD and EVD based principal component analysis (PCA) techniques are applied to the real-time PMU data collected from extra-high voltage (EHV) substations of transmission utility in the western regional grid of India. Adequacy of data is checked by Kaiser-Meyer-Olkin (KMO) test in order to have the satisfactory performance of these techniques towards achieving the objective of efficient data compression. Results are found satisfactory gives compression more than 80% using real time data.
Antioxidant and in vitro digestion property of black rice (Oryza sativa L.): a comparison study between whole grain and rice bran
Authors: Zhang Hui , Kai Guoyin , Xia Yongjun , Wang Guangqiang , Ai Lianzhong
Published: August 2020

A comparison study between whole grain and rice bran to evaluate the antioxidant activity and starch digestion property of black rice was conducted. Total phenolics content (TPC) and total anthocyanins content (TAC) analysis found that TPC and TAC contribution of rice bran to the whole grain were over 73 and 91%, respectively. Cyanidin-3-glucoside with minor peonidin-3-glucoside were identified in all whole grain and rice bran samples by HPLC-ESI-MS. The rice bran exhibited much stronger antioxidant activities than the whole grain, acting as the major antioxidant contributor to the black rice due to the high levels of TPC and TAC. In vitro digestion analysis found that rice bran could significantly decrease the digestibility and predicted glycemic index (pGI) of rice flour by lowering the rapid digestion starch and increasing the resistant starch (RS). This study revealed that rice bran could be a potential edible resource of phenolic-enriched antioxidant and glycemic regulator in food industry.
Isolation, screening, identification and tolerance of yeast in cherry wine lees
Authors: Xu Cheng , Xia Hui , Zhang Shuwen , Zhao Yuping , Qi Zhiqiang , Sun Zuli , Zhao Yongfu
Published: August 2020

In this study, yeast was isolated from cherry wine lees by rose Bengal medium, and its species was identified through three-stage screening, morphological observation and molecular biological identification. Moreover, the tolerance of screened strains was studied. The results showed that 30 strains of yeast were isolated from cherry wine lees, and five strains of yeast were selected, which were named YJN10, YJN16, YJN18, YJN19 and YJN28. After preliminary appraisal, strain YJN10 was Saccharomyces kudriavzevii, strain YJN16 was Saccharomyces paradoxus, and strains YJN18, YJN19, YJN28 were Saccharomyces cerevisiae. In the tolerance study, the tolerable sugar concentrations of the five strains were 650, 650, 550, 600 and 600 g/L. The tolerable alcohol volume fractions were 20, 20, 16, 18 and 18%. The tolerable molar concentration of potassium chloride was 1.8, 1.8, 1.5, 1.5 and 1.5 mol/L. Finally, strains YJN10, YJN16, YJN19 and YJN28 showed good tolerance, which laid a foundation for subsequent application in cherry wine fermentation.
A long-reach radio over free space optics (Ro-FSO) system using hybrid orthogonal frequency division multiplexing (OFDM)-multibeam concept with enhanced detection
Authors: Kuppusamy Peramandai Govindasamy , Rajkumar Kotteswaran , Maheswar Rajagopal , Sheeba Rani Soundarapandian , Amiri Iraj Sadegh
Published: August 2020

This paper focuses on designing of a 10 Gbit/s-10GHz hybrid Orthogonal frequency division multiplexing (FDM) based Radio over Free Space Optics (Ro-FSO) transmission link using optical single sideband modulation format and its performance has been compared using a different number of transmission beams. The proposed link has been simulated and compared using 1-beam, 2-beam, and 4-beam in the system. We show that by using the 4-beam system in the OFDM-Ro-FSO link, a 3000 m range has been achieved reliably, which a notable improvement when compared to previous work is. Also, we show an improved performance of the system by using an enhanced detection mechanism using a Square root module (SRm) at the receiver side.
COVID-19, neutrophil extracellular traps and vascular complications in obstetric practice
Authors: Makatsariya Alexander , Slukhanchuk Ekaterina , Bitsadze Viktoriya , Khizroeva Jamilya , Tretyakova Maria , Tsibizova Valentina , Dobryakov Andrey , Elalamy Ismail , Gris Jean C.
Published: August 2020

An issue of the novel coronavirus infection spreading is currently in the first place among others in the list of the international medical community. Due to lack of information, conflicting research findings, multicomponent effect of the virus on the body host, as well as various consequences that the virus triggers in the body, now every medical specialty does study the viral attack pathogenesis. Recent months showed that vascular complications are the most severe in the Coronavirus Disease 2019 (COVID-19) and are the main cause of death in the patients. The mechanisms of vascular complications are complex and affect both the hemostatic system and immune responses, “inflammatory storm”, disorders of the renin-angiotensin-aldosterone system, endotheliopathy, etc.

Due to the leading role of vascular complications in the viral infection pathogenesis, several groups of patients are at extra risk, including pregnant women, patients with a burdened obstetric history, with hereditary thrombophilia and antiphospholipid syndrome, and patients after in vitro fertilization (IVF). In this category of pregnant women, use of low-molecular-weight heparins (LMWH) is particularly important for both prevention of vascular and obstetric complications, and for pathogenetic therapy of COVID-19.
Subject-Contextualism and the Meaning of Gender Terms
Authors: Zeman Dan
Published: August 2020

In this paper, I engage with a recent contextualist account of gender terms (particularly, “woman”) proposed by Díaz-León, E. 2016. “Woman as a Politically Significant Term: A Solution to the Puzzle.”Hypatia31 (2): 245–58. Díaz-León’s main aim is to improve both on previous contextualist and non-contextualist views and solve a certain puzzle for feminists. Central to this task is putting forward a view that allows trans women who did not undergo gender-affirming medical procedures to use the gender terms of their choice to self-identify. My goal is to investigate Díaz-León’s proposal, point out (what I take to be) several shortcomings of the view and discuss possible replies on her part.
Asymptotic relations for the products of elements of some positive sequences
Authors: Chmielowska Agata , Różański Michał , Smoleń Barbara , Sobstyl Ireneusz , Wituła Roman
Published: August 2020

The aim of this study was to present a simple method for finding the asymptotic relations for products of elements of some positive real sequences. The main reason to carry out this study was the result obtained by Alzer and Sandor concerning an estimation of a sequence of the product of the first k primes.
Tiny zero-sum sequences over some special groups
Authors: Wang Linlin
Published: August 2020

Let

S
=

g

1

⋅
…
⋅

g

n

S={g}_{1}\cdot \ldots \cdot {g}_{n}

be a sequence with elements

g

i

{g}_{i}

from an additive finite abelian group G. S is called a tiny zero-sum sequence if S is non-empty,

g

1

+

…

+

g

n

=
0

{g}_{1}+\hspace{0.2em}\ldots \hspace{0.2em}+{g}_{n}=0

and

k
(
S
)
≔

∑

i
=
1

n

1

ord
(

g

i

)

≤
1

k(S):= {\sum }_{i=1}^{n}\frac{1}{\text{ord}({g}_{i})}\le 1

. Let

t
(
G
)

t(G)

be the smallest integer t such that every sequence of t elements (repetition allowed) from G contains a tiny zero-sum sequence. In this article, we mainly focus on the explicit value of

t
(
G
)

t(G)

and compute this value for a new class of groups, namely ones of the form

G
=

C

3

⊕

C

3
p

G={C}_{3}\oplus {C}_{3p}

, where p is a prime number such that

p
≥
5

p\ge 5

.
A family study of congenital dysfibrinogenemia caused by a novel mutation in the FGA gene: A case report
Authors: Qiao Yingli , Zhang Qisi , Xu Poshi , Deng Yuhui
Published: August 2020

Congenital dysfibrinogenemia (CD) is a rare hereditary fibrinogen disorder characterized by normal fibrinogen antigen levels associated with lower functional activities. The aim of this study is to analyze the phenotype and genotype of a family of CD. Routine coagulation screening tests were performed on the proband, her parents, and her grandparents. Then, the purified genomic DNA extracted from peripheral blood was amplified by PCR, and Sanger sequencing was performed to further confirm the mutation. The prothrombin time and activated partial thromboplastin time of the proband were normal, thrombin time prolonged, and the activity of fibrinogen (Fg:Ac) decreased significantly, but fibrinogen antigen (Fg:Ag) level was normal. The coagulation function indices of the proband’s father and grandfather were similar to her, and the indices of her mother and grandmother were normal. Sequencing results showed that the proband had a heterozygous missense mutation in FGA gene c.92G > A, which caused the mutation of amino acid 31 from glycine to glutamic acid (p.Gly31Glu). Her father had the same heterozygous mutation. In conclusion, the proband suffered from CD. The change of Gly31Glu in A chain due to the c.92G > A heterozygous missense mutation in the FGA gene is the cause of CD in the family. To the best of our knowledge, the mutation site is new and first reported so far.
Factorization of polynomials over valued fields based on graded polynomials
Authors: Fadil Lhoussain El
Published: August 2020

In this paper, we develop a new method based on Newton polygon and graded polynomials, similar to the known one based on Newton polygon and residual polynomials. This new method allows us the factorization of any monic polynomial in any henselian valued field. As applications, we give a new proof of Hensel’s lemma and a theorem on prime ideal factorization.
Coefficient inequalities related with typically real functions
Authors: Hussain Saqib , Khan Shahid , Noor Khalida Inayat , Raza Mohsan
Published: August 2020

In this paper, we are mainly interested to study the generalization of typically real functions in the unit disk. We study some coefficient inequalities concerning this class of functions. In particular, we find the Zalcman conjecture for generalized typically real functions.
Existence of wandering and periodic domain in given angular region
Authors: Mishra Vishnu Narayan , Tomar Garima
Published: August 2020

Dynamics of composition of entire functions is well related to it's factors, as it is known that for entire functions f and g, fog has wandering domain if and only if gof has wandering domain. However the Fatou components may have different structures and properties. In this paper we have shown the existence of domains with all possibilities of wandering and periodic in given angular region θ.
The sharp bounds of the second and third Hankel determinants for the class 𝓢𝓛*
Authors: Banga Shagun , Sivaprasad Kumar S.
Published: August 2020

In this paper, we use the novel idea of incorporating the recently derived formula for the fourth coefficient of Carathéodory functions, in place of the routine triangle inequality to achieve the sharp bounds of the Hankel determinants H
3(1) and H
2(3) for the well known class 𝓢𝓛* of starlike functions associated with the right lemniscate of Bernoulli. Apart from that the sharp bound of the Zalcman functional:

|

a
3
2

−

a
5

|

$\begin{array}{}
|a_3^2-a_5|
\end{array}$

for the class 𝓢𝓛* is also estimated. Further, a couple of interesting results of 𝓢𝓛* are also discussed.
𝔻-recurrent ∗-Ricci tensor on three-dimensional real hypersurfaces in nonflat complex space forms
Authors: Wang Yaning
Published: August 2020

Kaimakamis and Panagiotidou in [Taiwanese J. Math. 18(6) (2014), 1991–1998] proposed an open question: are there real hypersurfaces in nonflat complex space forms whose ∗-Ricci tensor satisfies the condition of 𝔻-parallelism? In this short note, we present an affirmative answer and prove that a three-dimensional real hypersurface in a nonflat complex space form has 𝔻-parallel ∗-Ricci tensor if and only if it is locally congruent to either a geodesic hypersphere of radius r in ℂ H
2(c) with

tanh
⁡
(

|

c

|

2

r
)
=

1
2

$\begin{array}{}
\displaystyle
\tanh(\frac{\sqrt{|c|}}{2}r) = \frac{1}{2}
\end{array}$

or a ruled real hypersurface.
The Lindley negative-binomial distribution: Properties, estimation and applications to lifetime data
Authors: Mansoor Muhammad , Tahir Muhammad Hussain , Cordeiro Gauss M. , Ali Sajid , Alzaatreh Ayman
Published: August 2020

A generalization of the Lindley distribution namely, Lindley negative-binomial distribution, is introduced. The Lindley and the exponentiated Lindley distributions are considered as sub-models of the proposed distribution. The proposed model has flexible density and hazard rate functions. The density function can be decreasing, right-skewed, left-skewed and approximately symmetric. The hazard rate function possesses various shapes including increasing, decreasing and bathtub. Furthermore, the survival and hazard rate functions have closed form representations which make this model tractable for censored data analysis. Some general properties of the proposed model are studied such as ordinary and incomplete moments, moment generating function, mean deviations, Lorenz and Bonferroni curve. The maximum likelihood and the Bayesian estimation methods are utilized to estimate the model parameters. In addition, a small simulation study is conducted in order to evaluate the performance of the estimation methods. Two real data sets are used to illustrate the applicability of the proposed model.
A new one-parameter discrete distribution with associated regression and integer-valued autoregressive models
Authors: Altun Emrah
Published: August 2020

This study introduces the Poisson-Bilal distribution and its associated two models for modeling the over-dispersed count data sets. The Poisson-Bilal distribution has tractable properties and explicit forms for its statistical properties. A new over-dispersed count regression model and integer-valued autoregressive process with flexible innovation distribution are defined and studied comprehensively. Two real data sets are analyzed to prove empirically the importance of proposed models. Empirical findings show that the Poisson-Bilal distribution has important application fields in time series and regression modeling.
On the bond pricing partial differential equation in a convergence model of interest rates with stochastic correlation
Authors: Stehlíková Beáta
Published: August 2020

Convergence models of interest rates are used to model a situation, where a country is going to enter a monetary union and its short rate is affected by the short rate in the monetary union. In addition, Wiener processes which model random shocks in the behaviour of the short rates can be correlated. In this paper we consider a stochastic correlation in a selected convergence model. A stochastic correlation has been already studied in different contexts in financial mathematics, therefore we distinguish differences which come from modelling interest rates by a convergence model. We provide meaningful properties which a correlation model should satisfy and afterwards we study the problem of solving the partial differential equation for the bond prices. We find its solution in a separable form, where the term coming from the stochastic correlation is given in its series expansion for a high value of the correlation.
Characterization of linear mappings on (Banach) ⋆-algebras by similar properties to derivations
Authors: Fadaee Behrooz , Fallahi Kamal , Ghahramani Hoger
Published: August 2020

Let 𝓐 be a ⋆-algebra, δ : 𝓐 → 𝓐 be a linear map, and z ∈ 𝓐 be fixed. We consider the condition that δ satisfies xδ(y)⋆ + δ(x)y
⋆ = δ(z) (x
⋆
δ(y) + δ(x)⋆
y = δ(z)) whenever xy
⋆ = z (x
⋆
y = z), and under several conditions on 𝓐, δ and z we characterize the structure of δ. In particular, we prove that if 𝓐 is a Banach ⋆-algebra, δ is a continuous linear map, and z is a left (right) separating point of 𝓐, then δ is a Jordan derivation. Our proof is based on complex variable techniques. Also, we describe a linear map δ satisfying the above conditions with z = 0 on two classes of ⋆-algebras: zero product determined algebras and standard operator algebras.
Crystal structure of poly[tetraaqua-bis(μ4-5-(4-carboxy-benzylamino)-isophthalato-κ4
O,O′:O′′:O′′′)-(μ2-4,4′-di(1H-imidazol-1-yl)-1,1′-biphenyl-κ2
N:N′)dicadmium(II)], C25H22N3O8Cd
Authors: Li Shi-Hui , Li Guan-Feng , Zhang Li
Published: August 2020

C25H22N3O8Cd, triclinic, P1̄ (no. 2), a = 10.2722(10) Å, b = 10.6897(11) Å, c = 12.5667(13) Å, α = 79.698(9)°, β = 72.168(9)°, γ = 63.166(10)°, V = 1170.8(2) Å3, Z = 2, R
gt(F) = 0.0618, wR
ref(F
2) = 0.1078, T = 293(2) K.
Crystal structure of 1-(6-hydroxy-2-phenylbenzofuran-5-yl)ethan-1-one, C16H12O3
Authors: Olomola Temitope O. , Maluleka Marole M. , Mphahlele Malose J.
Published: August 2020

C16H12O3, orthorhombic, Pbca (no. 61), a = 10.7095(3) Å, b = 8.1455(2) Å, c = 27.5374(8) Å, V = 2402.20(11) Å3, Z = 8, R
gt(F) = 0.0369, wR
ref(F
2) = 0.0947, T = 173(2) K.
Effect of phyto-extracts of neem (Azadirachta indica) and garlic (Allium sativum) on leaf spot disease of groundnut (Arachis hypogaea L.)
Authors: Chotangui Asafor Henry , Betigne Modjibaye , Mandou Marie Solange , Kamaleu Nelly Gaëtane Foussom , Kouam Eric Bertrand
Published: August 2020

A field experiment was conducted to investigate the effect of aqueous and ethanolic extracts of neem (Azadirachta indica A. JUSS) and garlic (Allium sativum L.) against Cercospora leaf spot (CLS) disease of groundnut (Arachis hypogaea L.). A split plot design using two exotic (“fleur” 11 var., 65-13 var.) and one local (village var.) variety of groundnut as the main factor and ten treatments comprising one negative control (sterile distilled water), one positive control (fungicide: spavozeb) and eight phyto-extracts replicated three times was applied. Treatments were applied to plots at 45, 60, 75 and 90 days after planting (DAP). Results showed that CLS disease incidence ranged between 66.67% and 88.89% at 65 DAP for 10% ethanolic extract of garlic and 20% aqueous extract of garlic, respectively. Disease severity was lowest for 20% ethanolic extracts of neem seeds (14.74%) and garlic bulb (14.99%) at 65 DAP. Yield obtained from treatments of ethanolic extracts of garlic (3.62 t ha−1) was significantly higher (p < 0.05) than the control (2.40 t ha−1) but comparable to the spavozeb treatment (3.09 t ha−1). Exotic varieties were more productive (3.13 and 3.43 t ha−1) than the more resistant local variety (2.67 t ha−1).
Resonance overvoltage control algorithms in long cable frequency conversion drive based on discrete mathematics
Authors: Deng Yonghong , Zhang Quanzhu
Published: August 2020

In order to solve the problem that the long cable variable voltage and variable frequency (VVVF) system does not adopt an effective capacitor voltage sharing control method, resulting in a poor effect of resonance overvoltage control, the resonance overvoltage control algorithm of the long cable VVVF system based on discrete mathematics is studied. First, the long cable frequency conversion drive system is established. In order to ensure voltage loss in the range of motor requirements, a frequency converter–cable–motor (ICM) system connection mode is used to maintain the system operation. Based on the research of the capacitor voltage balance control strategy of a long cable frequency conversion drive system, the discrete mathematical model of the AC side of the ICM system is established by using this control strategy. The improved constant active power controller is obtained by establishing the mathematical model, and the resonant overvoltage in a long cable frequency conversion drive is realized by using the constant active power controller. The experimental results show that the algorithm can effectively control the resonance overvoltage phenomenon in the long cable frequency control system, and the control accuracy is over 97%. It has good performance and can be applied in practice.
3D bending simulation and mechanical properties of the OLED bending area
Authors: Ma Liang , Gu Jinan
Published: August 2020

Due to the poor mechanical properties of traditional simulation models of the organic light-emitting device (OLED) bending area, this article puts forward a finite element model of 3D bending simulation of the OLED bending area. During the model construction, it is necessary to determine the viscoelastic and hyperelastic mechanical properties, respectively. In order to accurately obtain the stress changes of material deformation during the hyperelasticity determination, a uniaxial tensile test and a shear test were used to obtain data and thus to characterize the hyperelastic properties. In order to measure the viscoelasticity, a stress relaxation test was used to draw the stress relaxation curve, so as to characterize the viscoelastic properties. Then, the plane or axisymmetric stress–strain analysis was achieved, and the material parameters of the 3D model of the OLED bending area were obtained. Finally, the 3D model was applied to the 3D bending of the OLED bending area. Combined with the axisymmetric finite element analysis method, the 3D bending simulation finite element model of the OLED bending area was constructed by dividing the finite element mesh. Experimental results show that the mechanical properties of the proposed model are better than those of traditional OLED bending simulation models. Meanwhile, the proposed model has stronger application advantages.
The moral character of emotion work in adult-child interactions
Authors: Cekaite Asta , Evaldsson Ann-Carita
Published: August 2020

This special issue furthers a view in which affective stances are seen as indexical of culturally specific structures of feeling and norms concerning what counts as appropriate conduct in particular settings. The link between affect and everyday morality in the development and negotiations of moral personhood, identities and character work is demonstrated in the empirical studies that examine how affective stances are mobilized by drawing social boundaries, and by criticizing or sanctioning what counts as morally appropriate behaviors in adult-child socializing encounters embedded in time and space. The contributions highlight how socialization into particular forms of moral orders engages issues of affect, and how socialization into affect is permeated with moral work. The special issue draws on two major theoretical perspectives: the interactional perspective involving multimodal interaction analysis and the linguistic anthropologic view on language socialization that considers language use and cultural re-production to be interrelated. The socializing potentials of adult-child interactions, particularly in episodes involving the handling of normative transgressions and practices revolving around moral issues (conflicts, disciplining, non-compliance, negative affect and regulation of emotions), provide a fruitful site for uncovering otherwise rarely articulated normative socio-cultural assumptions of how to perform actions, display knowledge, express emotions and maintain relationships.
Dissociation mechanism from highly charged bromophenol: ab initio molecular dynamics simulations
Authors: Ohmura Satoshi , Nagaya Kiyonobu , Shimojo Fuyuki , Yao Makoto
Published: August 2020

Dissociation mechanisms are studied by ab initio molecular dynamics simulations based on density functional theory for the highly charged bromophenol (C6H4OHBr)n+ (n ≤ 10) in the ground electronic state and in an electronic state which has a high electronic temperature Te characterized by Fermi–Dirac distribution. In the case of the ground state, the dissociation occurs through a sequential multi-stage process. At times shorter than 20 fs after the molecule is charged, hydrogens are dissociated from the molecule and, subsequently, the carbon ring breaks at about 150 fs In the case of an electronic state with high Te, the mechanism changes from a sequential dissociation process to a simultaneous process occurring at Te > 5 eV. To estimate the charge transfer time in a molecular bromide parent ion with +6 charge, which is generated through Auger cascades, we also performed nonadiabatic quantum-mechanical molecular dynamics (NAQMD) simulations that include the effects of nonadiabatic electronic transition with a surface-hopping approach.
Comparison of detailed reaction mechanisms for homogeneous ammonia combustion
Authors: Kawka L. , Juhász G. , Papp M. , Nagy T. , Zsély I. Gy. , Turányi T.
Published: August 2020

Ammonia is a potential fuel for the storage of thermal energy. Experimental data were collected for homogeneous ammonia combustion: ignition delay times measured in shock tubes (247 data points in 28 datasets from four publications) and species concentration measurements from flow reactors (194/22/4). The measurements cover wide ranges of temperature T, pressure p, equivalence ratio φ and dilution. The experimental data were encoded in ReSpecTh Kinetics Data Format version 2.2 XML files. The standard deviations of the experimental datasets used were determined based on the experimental errors reported in the publications and also on error estimations obtained using program MinimalSplineFit. Simulations were carried out with eight recently published mechanisms at the conditions of these experiments using the Optima++ framework code, and the FlameMaster and OpenSmoke++ solver packages. The performance of the mechanisms was compared using a sum-of-square error function to quantify the agreement between the simulations and the experimental data. Ignition delay times were well reproduced by five mechanisms, the best ones were Glarborg-2018 and Shrestha-2018. None of the mechanisms were able to reproduce well the profiles of NO, N2O and NH3 concentrations measured in flow reactors.
Physical activity throughout pregnancy is key to preventing chronic disease
Authors: S Nagpal Taniya , F Mottola Michelle
Published: August 2020

According to The Developmental Origins of Health and Disease theory, the intrauterine environment of the developing fetus may impact later life physiology, including susceptibility to chronic disease conditions. Maternal exposures during pregnancy can affect the intrauterine environment and result in fetal programming for chronic diseases through changes in the structure or function of specific organs. Negative maternal exposures, such as poor nutrition intake, have been shown to increase the risk for later life chronic diseases. On the contrary, healthful behaviors, such as physical activity, may have a positive and protective effect against chronic disease risk. This narrative review summarizes literature to discuss the potential preventative role prenatal physical activity may have on prevalent chronic diseases: obesity, type 2 diabetes, and cardiovascular disease. We describe the natural physiological response to pregnancy that may increase the risk for complications and consequently later life disease for both mother and baby. We then present evidence highlighting the role prenatal exercise may have in preventing pregnancy complications and downstream chronic disease development, as well as proposing potential mechanisms that may explain the protective maternal and fetal physiological response to exercise. As the prevalence of these non-communicable diseases increase globally, intervening during pregnancy with an effective exercise intervention may be the key to preventing chronic disease risk in more than one generation.
Neprilysin as a Biomarker: Challenges and Opportunities
Authors: Pavo Noemi , Prausmüller Suriya , Bartko Philipp E , Goliasch Georg , Hülsmann Martin
Published: August 2020

Neprilysin (NEP) inhibition is a successful novel therapeutic approach in heart failure with reduced ejection fraction. Assessing individual NEP status might be important for gathering insights into mechanisms of disease and optimising individualised patient care. NEP is a zinc-dependent multisubstrate-metabolising oligoendopeptidase localised in the plasma membrane with the catalytic site facing the extracellular space. Although NEP activity in vivo is predominantly tissue-based, NEP can be released into the circulation via ectodomain shedding and exosomes. Attempts to determine circulating NEP concentrations and activity have not yet resulted in convincingly coherent results relating NEP biomarkers to heart failure disease severity or outcomes. NEP is naturally expressed on neutrophils, opening up the possibility of measuring a membrane-associated form with integrity. Small studies have linked NEP expression on neutrophils with inflammatory state and initial data might indicate its role in heart failure with reduced ejection fraction. Future studies need to assess the regulation of systemic NEP activity, which is assumed to be tissue-based, and the relationship of NEP activation with disease state. The relationship between tissue NEP activity and easily accessible circulating NEP biomarkers and the impact of the latter remains to be established.
Clinical Trial Perspective: Cost-effectiveness of Transcatheter Mitral Valve Repair Versus Medical Therapy in Patients with Heart Failure and Secondary Mitral Regurgitation. Results From the COAPT Trial
Authors: Baron Suzanne J
Published: August 2020

Treatment of secondary (or functional) mitral regurgitation had traditionally been limited to optimal medical therapy because studies have failed to show a survival benefit with mitral valve surgery for this condition. However, recently the Cardiovascular Outcomes Assessment of the MitraClip Percutaneous Therapy for Heart Failure Patients with Functional Mitral Regurgitation (COAPT) trial demonstrated a significant decrease in heart failure hospitalizations and mortality in patients with severe secondary mitral regurgitation treated with percutaneous edge-to-edge mitral valve repair (TMVr) using the MitraClip device compared with medical therapy. Based o the results of the COAPT trial, the Food and Drug Administration granted approval for MitraClip treatment of patients with severe secondary mitral regurgitation in March 2019. In an attempt to understand the economic impact of treating this patient population with TMVr using the MitraClip device, a formal cost-effectiveness analysis was performed alongside the COAPT trial. This review summarizes the methods and results of the economic substudy of the COAPT trial and discusses the value of the MitraClip device from the perspective of the US healthcare system in the treatment of patients with symptomatic heart failure and secondary mitral regurgitation.
Overview of Quantitative Flow Ratio and Optical Flow Ratio in the Assessment of Intermediate Coronary Lesions
Authors: Westra Jelmer , Tu Shengxian
Published: August 2020

Fractional flow reserve (FFR)-guided percutaneous coronary intervention (PCI) improves clinical outcome compared with angiography-guided PCI. Advances in computational technology have resulted in the development of solutions, enabling fast derivation of FFR from imaging data in the catheterization laboratory. The quantitative flow ratio is currently the most validated approach to derive FFR from invasive coronary angiography, while the optical flow ratio allows faster and more automation in FFR computation from intracoronary optical coherence tomography. The use of quantitative flow ratio and optical flow ratio has the potential for swift and safe identification of lesions that require revascularization, optimization of PCI, evaluation of plaque features, and virtual planning of PCI.