bluuebunny/crossref_metadata_2025_split huggingface dataset:
Serre’s Property (FA) for automorphism groups of free products
Authors: Andrew Naomi 
Published: November 2020

Abstract
We provide some necessary and some sufficient conditions for the automorphism group of a free product of (freely indecomposable, not infinite cyclic) groups to have Property (FA).
The additional sufficient conditions are all met by finite groups, and so this case is fully characterised.
Therefore, this paper generalises the work of N. Leder [Serre’s Property FA for automorphism groups of free products, preprint (2018), https://arxiv.org/abs/1810.06287v1].
for finite cyclic groups, as well as resolving the open case of that paper.
The Role of Social Media in Disaster Recovery Following Hurricane Harvey
Authors: Page-Tan Courtney 
Published: November 2020

AbstractHurricane Harvey was social media's first real stress test as a disaster response and recovery mechanism. A confluence of conditions makes it an ideal case study of social media's role in disaster recovery: the lack of a government-issued evacuation order, a call from government leadership for willing and able volunteers with a boat or high-water vehicle to perform life-saving rescues, and wide-spread adoption of social media platforms in the Houston area. While research on online social networks and disasters continues to grow, social scientists know little about how these online networks transform during a crisis and, further, how they drive disaster outcomes. With two original datasets, this study investigates how Houston's online social network transformed during Hurricane Harvey (2017), and the relationship between social media activity and post-Harvey recovery. The findings of a social network analysis (N= 2,387,610) and subsequent statistical analyses reveal the Houston-area online social network grew denser, clustered, and more efficient during the disaster. A spatial analysis and three separate regression models of activity before, during, and after Hurricane Harvey reveal that among 333 Nextdoor Neighborhoods, hyperlocal social media activity was a statistically significant predictor of the rate of rebuilding in these geographically based online communities. These findings suggest that policy and decision-makers should invest into online and offline hyperlocal social networks well before a disaster strikes, and leverage resources and legislation to maintain and strengthen the telecommunications and energy infrastructure that supports access to social media and telecommunications infrastructure during a time of crisis.
Preparing the CDC Public Health Workforce for Emergency Response
Authors: Davis Xiaohong M. , Rouse Edward N. , Stampley Chaunté 
Published: November 2020

Abstract
A critical component of successful public health emergency responses is the availability of appropriate numbers of personnel with emergency response expertise. To achieve this, the United States Centers for Disease Control and Prevention (CDC) focused on strengthening training, personnel database systems, and responder outreach. To ensure availability of well-trained public health emergency responders, CDC and external partners coordinated training, planning, exercise, and evaluation activities; established the School of Preparedness and Emergency Response; and implemented Responder Training Tiers for response roles with defined functional competencies. For personnel information, CDC developed interoperable databases to streamline the search for specific staff expertise for a response. To improve responder outreach, CDC developed various mechanisms to efficiently identify and assign potential responders to responses. These measures work together to sustain a qualified workforce for public health emergencies, and may be helpful to other public health agencies for staffing and training of their response workforce.
Algorithms for CRT-variant of Approximate Greatest Common Divisor Problem
Authors: Cheon Jung Hee , Cho Wonhee , Hhan Minki , Kim Jiseung , Lee Changmin 
Published: November 2020

AbstractThe approximate greatest common divisor problem (ACD) and its variants have been used to construct many cryptographic primitives. In particular, the variants of the ACD problem based on Chinese remainder theorem (CRT) are being used in the constructions of a batch fully homomorphic encryption to encrypt multiple messages in one ciphertext. Despite the utility of the CRT-variant scheme, the algorithms that secures its security foundation have not been probed well enough.In this paper, we propose two algorithms and the results of experiments in which the proposed algorithms were used to solve the variant problem. Both algorithms take the same time complexity $\begin{array}{}
\displaystyle
2^{\tilde{O}(\frac{\gamma}{(\eta-\rho)^2})}
\end{array}$ up to a polynomial factor to solve the variant problem for the bit size of samples γ, secret primes η, and error bound ρ. Our algorithm gives the first parameter condition related to η and γ size. From the results of the experiments, it has been proved that the proposed algorithms work well both in theoretical and experimental terms.
Orienting supersingular isogeny graphs
Authors: Colò Leonardo , Kohel David 
Published: November 2020

AbstractWe introduce a category of 𝓞-oriented supersingular elliptic curves and derive properties of the associated oriented and nonoriented ℓ-isogeny supersingular isogeny graphs. As an application we introduce an oriented supersingular isogeny Diffie-Hellman protocol (OSIDH), analogous to the supersingular isogeny Diffie-Hellman (SIDH) protocol and generalizing the commutative supersingular isogeny Diffie-Hellman (CSIDH) protocol.
Delegating a Product of Group Exponentiations with Application to Signature Schemes (Submission to Special NutMiC 2019 Issue of JMC)
Authors: Crescenzo Giovanni Di , Khodjaeva Matluba , Kahrobaei Delaram , Shpilrain Vladimir 
Published: November 2020

AbstractMany public-key cryptosystems and, more generally, cryptographic protocols, use group exponentiations as important primitive operations. To expand the applicability of these solutions to computationally weaker devices, it has been advocated that a computationally weaker client (i.e., capable of performing a relatively small number of modular multiplications) delegates such primitive operations to a computationally stronger server. Important requirements for such delegation protocols include privacy of the client’s input exponent and security of the client’s output, in the sense of detecting, except for very small probability, any malicious server’s attempt to convince the client of an incorrect exponentiation result. Only recently, efficient protocols for the delegation of a fixed-based exponentiation, over cyclic and RSA-type groups with certain properties, have been presented and proved to satisfy both requirements.In this paper we show that a product of many fixed-base exponentiations, over a cyclic groups with certain properties, can be privately and securely delegated by keeping the client’s online number of modular multiplications only slightly larger than in the delegation of a single exponentiation. We use this result to show the first delegations of entire cryptographic schemes: the well-known digital signature schemes by El-Gamal, Schnorr and Okamoto, over the q-order subgroup in ℤp, for p, q primes, as well as their variants based on elliptic curves. Previous efficient delegation results were limited to the delegation of single algorithms within cryptographic schemes.
Performance evaluation of a multihop WDM network with share-per-node L-WIXC architecture
Authors: Haque Munira , Majumder Satya P. 
Published: November 2020

Abstract
This paper investigates the impact of coherent and incoherent crosstalks on bit error rate of a multihop wavelength division multiplexing (WDM) transmission system with limited-wavelength-interchanging cross connects (L-WIXCs). The relation between the crosstalk and signal to crosstalk plus noise ratio at the receiver output is analyzed and redefined with an improved mathematical modeling. Quantitative analysis of the bit error rate (BER) in terms of system parameters like number of hops, number of fiber and number of wavelength channels per fiber are evaluated. The power penalty due to accumulated crosstalk at a given BER of 10−9 and the optimum system design parameters are also determined numerically. Results show that there is a significant power penalty of the order of 10–12 dB due to accumulated crosstalk depending on the number of hops. Maximum allowable number of hops at a given BER of 10−9 and number of input fibers are also evaluated.
Simulation performance signature evolution of optical inter satellite links based booster EDFA and receiver preamplifiers
Authors: Eid Mahmoud M. A. , Rashed Ahmed Nabih Zaki , El-din Ehab Salah 
Published: November 2020

Abstract
Aim and scope of this study is to simulate the performance signature of optical inter satellite links based booster Erbium doped fiber amplifier (EDFA) and receiver preamplifiers. The study is simulated to demonstrated the effect of changing the propagation distances between satellites spacing based on the booster EDFA and receiver preamplifiers. Signal power amplitude, Max. Q factor, and min bit error rate are investigated against the input power variations.
Pharmaco-vigilance of oral MethylErgometrine prescriptions for delayed and secondary postpartum haemorrhage
Authors: Pallivalapila Abdul Rouf , Babarinsa Isaac A. , Al-Baloushi Mariam , Moursi Ahmed , Bayo Arabo , Thomas Binny , Mahmoud Mohd Mahmoud G 
Published: November 2020

Abstract

Objectives
The objectives of this study were to quantify the prescription of oral methergin tablets in a busy Women’s Hospital, assess the stated indications for such prescription and highlight the issues and safety profile of Methergin use especially in the postpartum patient.

Methods
Review of prescription data for oral Methergin and the corresponding annual figures on primary and secondary postpartum hemorrhage.

Results
Over a period of 5 years, oral Methergin prescriptions for delayed and secondary postpartum hemorrhage constituted less than 1% of the overall prescription in Obstetrics and Gynaecology, which ranged between 1214 and 2085 per year. The numbers were too few to ascertain any relationship with both types of postpartum hemorrhage. Although stated on the relevant Patient Information leaflet, no local or regional guideline on its use exist.

Conclusions
Specific and random trend monitoring of medications for continuing safety profile, risk benefit issues, or unapproved indication, may help in identifying, preventing and mitigating any medication safety matters. Clinical pharmacists in collaboration with physicians are well placed in conducting such pharmacovigilance activities to improve medication safety.
Post-fire phyllostomid assemblages in forest patches of the Pantanal wetland
Authors: Santos Carolina F. , Teixeira Reinaldo C. , Raizer Josué , Fischer Erich 
Published: November 2020

Abstract
We report on phyllostomid assemblages just after a wildfire and again three months later across burned and unburned forest patches. We recorded 10 species throughout the fire disturbance gradient, mainly determined by changes in the understory. Burned patches presented high abundance of predator bats right after fire, including gleaning insectivorous, carnivorous, and sanguivorous. Three months later, burned forests were empty of predators and dominated by large frugivores that occurred throughout the whole gradient in both periods. The fire appears to create ephemeral opportunity to predator phyllostomids right after its passage, but subsequent vegetation recovery seems to reduce diversity in burned forests.
Circular RNA hsa_circ_0007121 regulates proliferation, migration, invasion, and epithelial–mesenchymal transition of trophoblast cells by miR-182-5p/PGF axis in preeclampsia
Authors: Gai Shukun , Sun Li , Wang Huiying , Yang Ping 
Published: November 2020

Abstract

Background
Mounting evidence has revealed that abnormal expression of circular RNAs play pivotal roles in many human diseases including preeclampsia (PE). While human sapiens circular RNA 0007121 (hsa_circ_0007121) has been verified to be downregulated in human placental tissues, the underlying mechanisms were still unclear. This research aims to investigate the effect and underlying mechanisms of hsa_circ_0007121 in preeclampsia.

Methods
The expression of hsa_circ_0007121, microRNA (miR)-182-5p, and placental growth factor (PGF) was assessed by quantitative reverse transcription polymerase chain reaction in PE placentas relative to the expression in normal pregnancy placentas. After transfection, cell counting kit-8 assay was employed to detect cell proliferation. Cell migration and invasion were tested by the transwell assay. The relative level of epithelial–mesenchymal transition (EMT)-related proteins in HTR-8/SVneo cells and PGF in placentas samples were measured by western blot. The relationship between miR-182-5p and hsa_circ_0007121 or PGF was predicated by circular RNA interactome or ENCORI and verified by dual-luciferase reporter assay and RNA immunoprecipitation assay.

Results
The levels of hsa_circ_0007121 and PGF were significantly declined in PE placental tissues and HTR-8/SVneo cells, whereas miR-182-5p had an opposite result. Downregulation of hsa_circ_0007121 obviously inhibited HTR-8/SVneo cell proliferation, migration, invasion, and EMT, while upregulation of hsa_circ_0007121 promoted this process. Besides, miR-182-5p was a target gene of hsa_circ_0007121 and could target PGF. Further analysis indicated that hsa_circ_0007121 regulated the proliferation, migration, invasion, and EMT of HTR-8/SVneo cells via altering PGF expression by interacting with miR-182-5p.

Conclusion
Hsa_circ_0007121 mediated the progression of PE via miR-182-5p/PGF axis.
Dynamically controlling local field enhancement at an epsilon-near-zero/dielectric interface via nonlinearities of an epsilon-near-zero medium
Authors: Baev Alexander , Prasad Paras N. , Alam M. Zahirul , Boyd Robert W. 
Published: November 2020

Abstract
For p-polarized light incident on an interface between an ordinary dielectric and an epsilon-near-zero (ENZ) material, an enhancement of the component of the electric field, normal to this interface, has been shown to occur. This local field enhancement holds great promise for amplifying nonlinear optical processes and for other applications requiring ultrastrong local fields in epsilon-near-zero based technologies. However, the loss associated with the imaginary part of the dielectric constant of an epsilon-near-zero material can greatly suppress the field enhancement factor. In this study, we analyze, using density matrix formalism, the field enhancement factor for a saturable two-level system that exhibits second- and third-order nonlinearities. We show that, in such a system, an almost lossless ENZ response can arise as a consequence of saturable nonlinearity and that the local field enhancement factor can be readily controlled dynamically by adjusting the intensity of the incident electromagnetic wave. Our findings provide for the first time a pathway to design a material exhibiting an external field responsive epsilon-near-zero behavior for applications in nonlinear photonics.
Crystal structure of (2-amino-5-bromo-3-iodophenyl)(3-(4-chlorophenyl)oxiran-2-yl)methanone, C15H10BrClINO2
Authors: Maluleka Marole M. , Mphahlele Malose J. 
Published: November 2020

Abstract
C15H10BrClINO2, monoclinic, P21/n (no. 14), a = 5.0083(2) Å, b = 9.7548(3) Å, c = 31.9640(10) Å, β = 92.576(2)°, V = 1560.02(9) Å3, Z = 4, R
gt(F) = 0.0416, wR
ref(F
2) = 0.1059, T = 173 K.
Synthesis, crystal structure and optical property of 1,6-bis(p-tolylthio)pyrene, C30H22S2
Authors: Jing Nie , Jian-Hua Wei , Zhong-Hai Ni 
Published: November 2020

Abstract
C30H22S2, triclinic,

P

1
‾

$P&#x203e;{1}$

(no. 2), a = 7.5621(2) Å, b = 8.6787(3) Å, c = 9.8951(3) Å, α = 110.4180(10)°, β = 97.6810(10)°, γ = 108.8430(10)°, V = 553.33(3) Å3, Z = 1, R
gt(F) = 0.0413, wR
ref(F
2) = 0.1160, T = 200(2) K.
Effect of SiO2 aerogels loading on photocatalytic degradation of nitrobenzene using composites with tetrapod-like ZnO
Authors: Yi Zhigang , Jiang Tao , Cheng Ying , Tang Qiong 
Published: November 2020

Abstract
To study the effect of improved adsorption property of tetrapod-like ZnO (T-ZnO) on its photocatalytic performance, a new composite was prepared by loading silica aerogels (SiO2(AG)) on the surface of T-ZnO via the sol–gel method. Various characterization methods showed that SiO2(AG) was uniformly loaded on the surface of T-ZnO, and the morphology as well as structural characteristics of SiO2(AG) and T-ZnO were not changed. Nitrobenzene (NB) was selected as the model pollutant, and the adsorption and photocatalytic properties of T-ZnO and SiO2(AG)/T-ZnO for NB were studied. The photocatalytic degradation processes of NB using T-ZnO and SiO2(AG)/T-ZnO followed the first-order reaction. Considering the initial moment reaction kinetic, the photocatalytic kinetic of SiO2(AG)/T-ZnO and T-ZnO was consistent with the Langmuir–Hinshelwood kinetic model, and reaction rate constant

k

SiO

2

AG

/
T-ZnO

′

>

k

T-ZnO

′

{k}_{{\text{SiO}}_{2}\left(\text{AG}\right)/\text{T-ZnO}}^{^{\prime} }\gt {k}_{\text{T-ZnO}}^{^{\prime} }

, adsorption rate constant

K

ad

SiO

2

(
AG
)
/
T-ZnO

{K}_{\text{ad}{\text{SiO}}_{2}(\text{AG})/\text{T-ZnO}}

> K
ad T-ZnO, which demonstrated that SiO2(AG) loading could increase T-ZnO adsorption to NB, then promoted its photocatalytic performance.
Classification and geovisualization process of soil data using a web-based spatial information system
Authors: Balla Dániel , Novák Tibor József , Kiss Emőke , Mester Tamás , Karancsi Gergő , Zichar Marianna 
Published: November 2020

Abstract
Because of the increased demand for information, the scientific community have published their results on the Internet over the last 20 years, adapting to society requirements. Due to the development of web-based spatial information soil systems, access to data on various themes and of varying quality has become substantially easier. The focus of our paper is to demonstrate a freely accessible and usable web-based soil database and soil information system (Soil Information and Soil Classifier System), which is suitable for geovisualization uploaded soil data and for determining reference soil groups (RSGs) in accordance with the World Reference Base of Soil Resources (WRB; RSG). In order to achieve this, we algorithmized the diagnostic soil classification process of the WRB, then we created decision trees to correspond input soil data to the WRB system. In order to facilitate geovisualization of the spatial data, the Keyhole Markup Language file format supported by Google API was applied.
Cluster analysis to the factors related to information about food fibers: A multinational study
Authors: Guiné Raquel P. F. , Correia Paula , Leal Marcela , Rumbak Ivana , Barić Irena C. , Komes Drazenka , Satalić Zvonimir , Sarić Marijana M. , Tarcea Monica , Fazakas Zita , Jovanoska Dijana , Vanevski Dragoljub , Vittadini Elena , Pellegrini Nicoletta , Szűcs Viktória , Harangozó Júlia , EL-Kenawy Ayman , EL-Shenawy Omnia , Yalçın Erkan , Kösemeci Cem , Klava Dace , Straumite Evita , Ferreira Manuela , Florença Sofia G. 
Published: November 2020

AbstractThe adequate intake of dietary fibers is essential to human health. Hence, this study intended to evaluate the level knowledge of about food fibers and investigate what factors might be associated with it. A descriptive cross-sectional study was conducted on a sample composed of 6,010 participants from ten different countries. The survey was based on a questionnaire of self-response, approved and complying with all ethical issues. The data collected were subjected to the factor analysis (FA) and the cluster analysis (CA). Validation was done by splitting the data set into two equal parts for confirmation of the results. FA concluded that ten from the 12 variables used to measure the knowledge about dietary fibre (DF) should be grouped into two dimensions or factors: one linked to health effects of DF (α= 0.854) and the other to its sources (α= 0.644). CA showed that the participants could be divided into three groups: Cluster 1 – good knowledge both about sources and health effects of DF; Cluster 2 – good knowledge about the sources of DF but poor knowledge about its health effects; Cluster 3 – poor knowledge both about sources and health effects of DF. The data were appropriate for the analysis by means of factor and CA, so that two factors and three clusters were clearly identified. Moreover, the cluster membership was found varying mostly according to the country, living environment, and level of education but not according to age or gender.
Political Humor in Ibn Mammātī'sKitāb al-Fāshūsh fi Aḥkām Qarâqûsh (The Decisions of Qarâqûsh)
Authors: Dowaidar Ibrahim 
Published: November 2020

AbstractThis study is an attempt to investigate medieval humor in the Ayyubid period (1171–1250). In a period of constant wars, terrible plagues, and turmoil, Ibn Mammātī wrote a pamphlet entitledKitāb al-Fāshūsh fi Aḥkām Qarâqûsh (stupidity, or the decisions of Qarâqûsh). It is a small volume which contains words and actions that Qarâqûsh could have said or done. The book is written as an attempt to ridicule one of the most important political leaders of the Ayyubid state Emir Qarâqûsh Ibn ‘Abd Allāh al-Asadī (surnamed as Bah’āaddīn Qarâqûsh) (n.d. – April 1201). The book is so influential that historical facts are overshadowed, and overwhelmed by the humorous anecdotes that branded Qarâqûsh forever as a symbol of a lunatic tyrant. This manuscript, however, is believed to be one of the oldest books on political humor in the Egyptian history (Al-Najjār 1978: 56). Therefore, using a critical discourse analysis perspective, the study seeks to examine and analyze humor and jokes in selected anecdotes from Ibn Mammātī’s book. I have drawn upon the three-dimensional model of discourse analysis developed by Norman Fairclough (1992a, 1995a, 1995b, 2001, 2003). The study aims to prove that this pamphlet has been used in the entire Islamic world in different epochs as a defense mechanism against all the ruthless sultans, kings, rulers, and presidents. I claim that these jokes have served as a sort of recreation for the people, as a means of peaceful protest, and as a silent cry against oppression and tyranny.