bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analytical predictor–corrector entry guidance for hypersonic gliding vehicles
Authors: Chen Huatao , Zhao Kun , Guirao Juan L.G. , Cao Dengqing 
Published: December 2020

Abstract
For the entry guidance problem of hypersonic gliding vehicles (HGVs), an analytical predictor–corrector guidance method based on feedback control of bank angle is proposed. First, the relative functions between the velocity, bank angle and range-to-go are deduced, and then, the analytical relation is introduced into the predictor–corrector algorithm, which is used to replace the traditional method to predict the range-to-go via numerical integration. To eliminate the phugoid trajectory oscillation, a method for adding the aerodynamic load feedback into the control loop of the bank angle is proposed. According to the quasi-equilibrium gliding condition, the function of the quasi-equilibrium glide load along with the velocity variation is derived. For each guidance period, the deviation between the real-time load and the quasi-equilibrium gliding load is revised to obtain a smooth reentry trajectory. The simulation results indicate that the guidance algorithm can adapt to the mission requirements of different downranges, and it also has the ability to guide the vehicle to carry out a large range of lateral maneuvers. The feedback control law of the bank angle effectively eliminates the phugoid trajectory oscillation and guides the vehicle to complete a smooth reentry flight. The Monte Carlo test indicated that the guidance precision and robustness are good.
Streamlining IoT system development with open standards
Authors: Korkan Ege , Kaebisch Sebastian , Steinhorst Sebastian 
Published: December 2020

Abstract
The Internet of Things (IoT) is bringing Internet connectivity to a wide range of devices which results in an increasing number of products for smart home, industry 4.0 and/or smart cities. Even though IoT has the ambition to reach an increasing amount of devices and be scalable across different domains, lack of interoperability inhibits this scope to be attained. Recent standardization efforts by the World Wide Web Consortium (W3C) are addressing the interoperability problem by the means of Thing Description (TD) that allows humans and machines to understand the capabilities and communication interfaces of IoT devices. In this paper, we show a more systematic and streamlined development of IoT devices and systems that relies on the TD standard. We introduce three different complementary methods that can be applied independently in the different stages of the development, or as a framework to streamline the development of IoT devices and systems. As a result of using the TD standard, interoperability between IoT devices of various stakeholders is ensured from early stages and the time to market is reduced.
Extensions of coefficient estimates for new classes of bi-univalent functions defined by Sǎlǎgean integro-differential operator
Authors: Páll-Szabó Ágnes Orsolya 
Published: December 2020

Abstract
In this paper, we introduce and investigate three new general classes of bi-starlike and bi-convex functions of Ma–Minda type defined by the Sǎlǎgean integro-differential operator. Bounds of the first three coefficients

|

a
2

|

{\lvert a_{2}\rvert}

,

|

a
3

|

{\lvert a_{3}\rvert}

and

|

a
4

|

{\lvert a_{4}\rvert}

are given.
On the stabilisers of points in groups with micro-supported actions
Authors: Francoeur Dominik 
Published: December 2020

Abstract
Given a group 𝐺 of homeomorphisms of a first-countable Hausdorff space 𝒳, we prove that if the action of 𝐺 on 𝒳 is minimal and has rigid stabilisers that act locally minimally, then the neighbourhood stabilisers of any two points in 𝒳 are conjugated by a homeomorphism of 𝒳.
This allows us to study stabilisers of points in many classes of groups, such as topological full groups of Cantor minimal systems, Thompson groups, branch groups, and groups acting on trees with almost prescribed local actions.
Cell – extracellular matrix interaction in glioma growth. In silico model
Authors: Kalinin Vladimir 
Published: December 2020

AbstractThe study aims to investigate the role of viscoelastic interactions between cells and extracellular matrix (ECM) in avascular tumor growth. Computer simulations of glioma multicellular tumor spheroid (MTS) growth are being carried out for various conditions. The calculations are based on a continuous model, which simulates oxygen transport into MTS; transitions between three cell phenotypes, cell transport, conditioned by hydrostatic forces in cell–ECM composite system, cell motility and cell adhesion. Visco-elastic cell aggregation and elastic ECM scaffold represent two compressible constituents of the composite. Cell–ECM interactions form a Transition Layer on the spheroid surface, where mechanical characteristics of tumor undergo rapid transition. This layer facilitates tumor progression to a great extent. The study demonstrates strong effects of ECM stiffness, mechanical deformations of the matrix and cell–cell adhesion on tumor progression. The simulations show in particular that at certain, rather high degrees of matrix stiffness a formation of distant multicellular clusters takes place, while at further increase of ECM stiffness subtumors do not form. The model also illustrates to what extent mere mechanical properties of cell–ECM system may contribute into variations of glioma invasion scenarios.
Conditional stability in a backward Cahn–Hilliard equation via a Carleman estimate
Authors: Shang Yunxia , Li Shumin 
Published: December 2020

Abstract
We consider a Cahn–Hilliard equation in a bounded domain Ω in

ℝ
n

{\mathbb{R}^{n}}

over a time interval

(
0
,
T
)

{(0,T)}

and discuss the backward problem in time of determining intermediate data

u
⁢

(
x
,
θ
)

{u(x,\theta)}

,

θ
∈

(
0
,
T
)

{\theta\in(0,T)}

,

x
∈
Ω

{x\in\Omega}

from the measurement of the final data

u
⁢

(
x
,
T
)

{u(x,T)}

,

x
∈
Ω

{x\in\Omega}

. Under suitable a priori boundness assumptions on the solutions

u
⁢

(
x
,
t
)

{u(x,t)}

, we prove a conditional stability estimate for the semilinear Cahn–Hilliard equation

∥

u
⁢

(
⋅
,
θ
)

∥

L
2

⁢

(
Ω
)

≤

C
⁢

∥

u
⁢

(
⋅
,
T
)

∥

H
2

⁢

(
Ω
)

κ
0

,

\lVert u(\,\cdot\,,\theta)\rVert_{L^{2}(\Omega)}\leq C\lVert u(\,\cdot\,,T)%
\rVert_{H^{2}(\Omega)}^{\kappa_{0}},

and a conditional stability estimate for the linear Cahn–Hilliard equation

∥

u
⁢

(
⋅
,
θ
)

∥

H
β

⁢

(
Ω
)

≤

C
⁢

∥

u
⁢

(
⋅
,
T
)

∥

H
2

⁢

(
Ω
)

κ
1

,

\lVert u(\,\cdot\,,\theta)\rVert_{H^{\beta}(\Omega)}\leq C\lVert u(\,\cdot\,,T%
)\rVert_{H^{2}(\Omega)}^{\kappa_{1}},

where

θ
∈

(
0
,
T
)

{\theta\in(0,T)}

,

β
∈

(
0
,
4
)

{\beta\in(0,4)}

and

κ
0

,

κ
1

∈

(
0
,
1
)

{\kappa_{0},\kappa_{1}\in(0,1)}

. The proof is based on a Carleman estimate with the weight function

e

2
⁢
s
⁢

e

λ
⁢
t

{\mathrm{e}^{2s\mathrm{e}^{\lambda t}}}

with large parameters

s
,
λ

∈

ℝ
+

{s,\lambda\in\mathbb{R}^{+}}

.
Full duplex dispersion compensating system based on chromatic dispersion in analog RoF links
Authors: Dileep Deyitha , Sindhu Supriya S. , Zacharias Joseph 
Published: December 2020

Abstract
Radio over Fiber technology is a promising solution for next-generation wireless communication networks. In radio over fiber systems, signal distortions caused by modulator nonlinearity is a major concern. In this paper, a full duplex dispersion compensating system using chromatic dispersion is proposed. A system using 16 QAM OFDM signal transmission is presented. Distortion compensation is observed when a required amount of dispersion is added. Bit Error Rate (BER) and constellation diagrams for different amount of dispersion are analyzed and its comparison is presented. Since the framework utilizes just a single persistent wave laser for upstream and downstream transmission the base station is additionally disentangled and it diminishes the general framework cost. Signal distortions are reduced when the dispersion is adjusted to 640 ps/nm for uplink transmission and 760 ps/nm for downlink transmission.
Measuring clock jitter and data signals for bit error detection in optical transceiver systems
Authors: Eid Mahmoud M. A. , Rashed Ahmed Nabih Zaki , Kabir Md. Anowar , Hassan Md. Mehedi 
Published: December 2020

Abstract
This work demonstrates how to measure jitter using the eye diagram Analyzer histogram feature. Bit sequence generator is employed with the NRZ Pulse generator with the electrical jitter in order to measure the signal amplitude level. We have modulated the light signal from CW Laser with the electrical signal by Mach-Zehnder Modulator through 5 km fiber cables. The signal can be amplified with a gain of 7 dB with the presence of transimpedence amplifier. The combination of electrical signal and signal from noise source can be filtered by using the low pass Gaussian filter.
Prepubescent unilateral gynecomastia secondary to excessive soy consumption
Authors: Sea Jessica L. , Abramyan Mikayel , Chiu Harvey K. 
Published: December 2020

Abstract

Objective
We present a case of an unusual cause of prepubertal gynecomastia.

Case Presentation
Enlargement of breast tissue in males, or gynecomastia, is a rare condition in prepubescent boys. We describe an 8-year-old male who developed unilateral gynecomastia secondary to marked dietary soy consumption. While the majority of cases are idiopathic, soy products, particularly those consumed by our patient, can contain high levels of phytoestrogens, which have been documented in limited case studies to contribute to abnormal development of breast tissue in adolescent and adult males. To our knowledge, this is the first documented case of gynecomastia occurring in a prepubescent patient resulting from excessive intake of dietary soy. Importantly, we also report a complete resolution of gynecomastia upon exclusion of dietary products containing significant amounts of soy.

Conclusion
While soybeans and soy-derived products can be an important source of nutrition for some, those with abnormal sensitivity to phytoestrogens may benefit from limiting dietary soy consumption to avoid potential adverse effects, including gynecomastia.
Coexistence of dyschondrosteosis associated to SHOX deficiency, pseudohypoparathyroidism 1B, and chronic autoimmune thyroiditis: a case report
Authors: Marin Fernando , Jodar Esteban , Sánchez del Pozo Jaime 
Published: December 2020

Abstract
We present an unusual case of SHOX deficiency associated with Léri-Weill dyschondrosteosis (LWD), Hashimoto’s thyroiditis and pseudohypoparathyroidism 1B in a young woman. To our knowledge, this is the first ever report of these disorders coexisting. At the age of nine years, the proband was diagnosed of hypothyroidism due to Hashimoto’s thyroiditis, and developed biochemical abnormalities consistent with hyperphosphatemia, mild hypocalcemia and elevated parathyroid hormone without any clinical symptoms except short stature. Replacement therapy with levothyroxine, calcium and alphacalcidol was initiated. The diagnosis of pseudohypoparathyroidism 1B was confirmed at the age of 17.5 years with the demonstration of methylation alteration at the GNAS locus. At the age of 16 years, 3.5 years after her menarche, she presented clear features of LWD. A large deletion of the SHOX gene was confirmed. Family genetic tests were not doable since she was adopted. We discuss the diagnostic challenges of these coexisting rare endocrinopathies.
Effect of vitamin D3 supplementation during pregnancy on high risk factors — a randomized controlled trial
Authors: Xiaomang Jiang , Yanling Wei 
Published: December 2020

Abstract

Objectives
Vitamin D plays an important role in the release of the placenta and implantation, and low levels are a risk factor for pre-eclampsia. Studies have also shown that symptomatic treatment of vitamin D3 deficiency can effectively reduce the risk of pre-eclampsia. In this study, vitamin D3 supplementation was performed on the risk of pre-eclampsia to observe its effect.

Methods
From January 2016 to December 2018, 450 women with maternal treatment and delivery in our hospital underwent an open-label randomized study. The pregnant women were divided into low-dose, medium-dose, and high-dose groups. Compare the incidence of pre-eclampsia and the dose effect of vitamin D levels.

Results
In the maternal and perinatal periods of the 450 maternal women, the 25[OH] index of the three groups of pregnant women was significantly increased, while the high-dose increase index was more obvious. The relative risk reduction rate was significantly lower. Compared with the low-dose and middle-dose groups, the high-dose group had a significantly lower incidence of pre-eclampsia, while the IUGR index was lower, and other obstetric indicators were comparable.

Conclusion
Vitamin D supplementation can effectively reduce the incidence of pre-eclampsia, while reducing the IUGR index, which has important value and significance in its clinical application.
Comparative study of a new commercial recombinant line assay and two immunoassays for detection of SARS-CoV-2 IgG antibodies in PCR-confirmed outpatients
Authors: Wellinghausen Nele , Ivanova Ralitsa , Deininger Susanne , Götz Andrea 
Published: December 2020

Abstract

Objectives
Commercially available immunoassays have been developed for detection of antibodies against SARS-CoV-2. However, equivocal and discrepant results between different immunoassay can occur requiring further assessment by confirmatory tests.

Methods
We investigated the new commercial line assay recomLine SARS-CoV-2 IgG (Mikrogen, containing the antigens S1, receptor-binding domain of the spike protein, and nucleocapsid protein (NP) of SARS-CoV-2) within a collection of well characterized serum samples from COVID-19 outpatients (n=49) and SARS-CoV-2-PCR-positive asymptomatic contact persons (n=6) in comparison to two commercial immunoassays, the S1 antigen based Anti-SARS-CoV-2-ELISA IgG by Euroimmun and the NP based Elecsys® Anti-SARS-CoV-2 by Roche.

Results
The recomLine assay was positive in all samples which had an equivocal or positive result for SARS-CoV-2 antibodies in at least one of the two immunoassays. It showed high agreement with the overall results of the immunoassays (94.5% [Cohen’s kappa = 0.85] and 92.7% [Cohen’s kappa 0.81] to the ELISA by Euroimmun and the assay by Roche, respectively). In addition, high agreement of the reactivity to the specific antigens S1 and NP in the recomLine assays compared to the results of the S1 based ELISA and NP based Elecsys® assay, was found (90.9% [Cohen’s kappa 0.78] and 96.4% [Cohen’s kappa 0.91] for S1 and NP, respectively).

Conclusions
The new recomLine SARS-CoV-2 IgG assay may be used as an additional tool for investigation of equivocal or discrepant results of Anti-SARS-CoV-2 immunoassays and for antigen-specific detection of SARS-CoV-2 IgG antibodies.
A new kumaraswamy generalized family of distributions: Properties and applications
Authors: Hussain Muhammad Adnan , Tahir Muhammad Hussain , Cordeiro Gauss M. 
Published: December 2020

Abstract
The Kumaraswamy generalized family of distributions proposed by Cordeiro and de-Castro (2011), has received increased attention in modern distribution theory with 624 google citations, and more than 50 special models have been studied so far. We define another generator, and then propose a new Kumaraswamy generalized family of distributions by inducting this new generator. Some useful properties of the proposed family are obtained such as quantiles, linear representation of the density, moments and generating function. The method of maximum likelihood is used for estimating family parameters. The properties of a special model of the family, called new Kumaraswamy-Burr XII distribution, are reported. A simulation study is conducted to assess the performance of maximum likelihood estimates of the proposed model. Two real-life data sets are analyzed to illustrate the flexibility of proposed model.
A common fixed point theorem for non-self mappings in strictly convex menger PM-spaces
Authors: Nikolić Rale M. , Ristić Vladimir T. , Ćirović Nataša A. 
Published: December 2020

Abstract
In this paper we prove existence and uniqueness of a common fixed point for non-self coincidentally commuting mappings with nonlinear, generalized contractive condition defined on strictly convex Menger PM-spaces proved.
On the Possibility of and Justification for a Philosophical Interpretation of Kabbalah: The Scholem-Gordin Correspondence
Authors: Werdiger Ori 
Published: December 2020

Abstract
This article introduces and discusses a short correspondence that took place in November 1931 between Gershom Scholem and Jacob Gordin. Gordin was a Russian-Jewish philosopher of religion, an expert on Hermann Cohen, and a founding figure of the postwar Paris School of Jewish Thought. The initial motivation for the correspondence was Scholem’s wish to produce a critical edition of the 17th century kabbalistic work, Shaar Hashamayim by Abraham Cohen Herrera, for which he asked for Gordin’s help. A close reading of Gordin’s response to Scholem and Scholem’s belated response to Gordin highlight the respective views of these thinkers regarding the relationship between kabbalah and Western philosophy in the modern era, and in German idealism in particular. The article is followed by a translation of the correspondence.
Combining Zn0.76Co0.24S with S-doped graphene as high-performance anode materials for lithium- and sodium-ion batteries
Authors: Lin Yemao , Huang Jintao , Shi Ludi , Cong Guangtao , Zhu Caizhen , Xu Jian 
Published: December 2020

Abstract
An easy and facile hydrothermal method is presented to synthesize hybrid materials of hollow mesoporous Zn0.76Co0.24S nanospheres anchored on reduced graphene oxide (rGO) sheets (Zn0.76Co0.24S@N/S-rGO), in which the obtained Zn0.76Co0.24S nanospheres are composed of numerous nanoparticles. Being evaluated as anode materials for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs), the Zn0.76Co0.24S@N/S-rGO composites exhibited a high reversible capacity of 804 and 605 mA h g−1 at the current density of 1 A g−1 after 500 cycles for LIBs and SIBs, respectively. The excellent electrochemical performance of Zn0.76Co0.24S@N/S-rGO composites originates from the synergistic effect between hollow Zn0.76Co0.24S nanospheres and reduction graphene, as well as the void spaces between the neighbouring nanoparticles of Zn0.76Co0.24S providing large contact areas with electrolyte and buffer zone to accommodate the volume variation during the cycling process.
Internetbezogene Störungen: Wo kann Prävention ansetzen?
Authors: Müller Kai W. , Schneider Kristin , Wölfling Klaus 
Published: December 2020

ZusammenfassungInternetbezogene Störungen umfassen unterschiedliche Onlineaktivitäten, die exzessiv entgleiten, das Leben Betroffener dominieren und zu nachhaltigen negativen Folgen führen können. Da internetbezogene Störungen einen chronischen Verlauf nehmen und eine erhöhte psychopathologische Symptombelastung bedingen können, sind wirksame Interventionsprogramme und evaluierte Präventionsangebote dringend notwendig.
Die Opioid-Krise in den USA
Authors: Lohmann Katrin , Röbbelen Alice , Krumm Stephan 
Published: December 2020

Zusammenfassung
Die freigiebige Verschreibung und einfache Verfügbarkeit opioidhaltiger Arzneimittel bewirkten in den USA vielfach einen missbräuchlichen Konsum und Opioidabhängigkeiten. Dies wiederum führte zu strikteren Verordnungen, wodurch illegale Rauschgifte an Bedeutung gewannen – einhergehend mit einer Erhöhung der Anzahl der Drogentoten. In Deutschland zeichnet sich bisher keine ähnliche Entwicklung ab, allerdings ist ein enges Monitoring der Entwicklung notwendig, um frühzeitig reagieren zu können.
Impact of foaming agent and nanoparticle fillers on the properties of irradiated rubber
Authors: Eyssa Hanan M. , El Mogy Soma A. , Youssef Hussein A. 
Published: December 2020

Abstract
A sponge rubber nanocomposite based on styrene–butadiene rubber (SBR)/nanoclay (montmorillonite, MMT) or nano-calcium carbonate (CaCO3) fillers with various foaming agent contents was produced by a simple technique, roll milling. The nanoparticles were examined by different techniques, such as X-ray fluorescence (XRF), X-ray diffraction (XRD), energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), and Fourier-transform infrared (FT–IR). The sponge rubber nanocomposites were characterized by scanning electron microscopy (SEM) image analysis before and after exposures to radiation doses, as well as by the XRD patterns for the unirradiated samples. The different properties of the obtained nanocomposites, including their foaming degree, tensile strength, elongation at break, and thermal conductivity, were also investigated. The foam composites containing nano-CaCO3 possessed the best cell and crosslinking densities and mechanical properties among the other composites, while its foaming degree was the lowest. The results indicated that the thermal conductivity was reduced by increasing the foaming agent concentration. However, it increased as the radiation dose increased, and the optimum radiation dose was obtained at 75 kGy. The foam containing MMT exhibited an intermediate behavior while high thermal conductivity was recorded for the foam containing the CaCO3 nanoparticles.
Genetic Algorithm as Automated Valuation Model Component in Real Estate Investment Decisions System
Authors: Chmielewska Aneta , Adamiczka Jerzy , Romanowski Michał 
Published: December 2020

AbstractEvery real-estate related investment decision making process calls for the careful analysis of available information even though it is often carried out in conditions of uncertainty. The paper attempts to minimize the impact of the factor on the quality of real estate investment decisions through the proposal of application of tools based on the simulation of the process of natural selection and biological evolution. The aim of the study is to analyze the potential of methodology based on genetic algorithms (GA) to build automated valuation models (AVM) in uncertainty conditions and support investment decisions on the real estate market. The developed model facilitates the selection of properties adequate to the adopted assumptions, i.e. individuals best suited to the environment. The tool can be used by real estate investment advisors and potential investors on the market to predict future processes and the proper confrontation of past events with planned events. Even though genetic algorithms are tools that have already found particular application on real estate market, there are still areas that need further studies in the case of more effective uses. The obtained results allow for the possibilities and barriers of applying GA to real estate market analyses to be defined.
A new kernel-projective statistical estimator in the Monte Carlo method
Authors: Mikhailov Gennady A. , Tracheva Natalya V. , Ukhinov Sergey A. 
Published: December 2020

AbstractIn the present paper, we propose a new combined kernel-projective statistical estimator of the two-dimensional distribution density, where the first ‘main’ variable is processed with the kernel estimator, and the second one is processed with the projective estimator for the conditional distribution density. In this case, statistically estimated coefficients of some orthogonal expansion of the conditional distribution density are used for each ‘kernel’ interval defined by a micro-sample. The root-mean-square optimization of such an estimator is performed under the assumptions concerning the convergence rate of the used orthogonal expansion. The numerical study of the constructed estimator is implemented for angular distributions of the radiation flux forward-scattered and backscattered by a layer of matter. A comparative analysis of the results is performed for molecular and aerosol scattering.