bluuebunny/crossref_metadata_2025_split huggingface dataset:
Computability of finite quotients of finitely generated groups
Authors: Rauzy Emmanuel 
Published: October 2021

Abstract
We systematically study groups whose marked finite quotients form a recursive set.
We give several definitions, and prove basic properties of this class of groups, and in particular emphasize the link between the growth of the depth function and solvability of the word problem.
We give examples of infinitely presented groups whose finite quotients can be effectively enumerated.
Finally, our main result is that a residually finite group can fail to be recursively presented and still have computable finite quotients, and that, on the other hand, it can have solvable word problem but not have computable finite quotients.
Fiber Bragg grating-based monitoring system for fiber to the home (FTTH) passive optical network
Authors: Hammadi Yousif I. 
Published: October 2021

AbstractFiber to the home (FTTH) passive optical network is one of the cost effective and effortlessly planning systems in the current era of communication systems. However, one of the substantial limitations of this optical communication network is the monitoring operation. It is essential to locate the fault branch in the network in order to take the required action to overcome the problem. Unfortunately, since the network is all passive, it is necessary to introduce a technique that should be passive and has the capacity to locate the fault location inside the network. In this paper, a methodology to localize the fault line was introduced, where a combination of Fiber Bragg Gratings was suggested, using this approach, the fault location can be easily determined among 36-branch, distributed in eight groups. Simulation results show that the broken line can be determined through monitoring the reflected signals from all the branches in the Central Office without paying any power to locate the leakage. In other words, it is easy to recognize the fault location by monitoring the power of the reflected signals, where after comprehensive simulations and power calculations, it was possible to put a threshold for that reflected power, hence, the fault branch, for any reason, may reflect power of less than that threshold, otherwise, the branch is not considered as broken.
The designing of ocean threat comics by elementary students
Authors: Pantaleo Sylvia 
Published: October 2021

Abstract
A paucity of research has been conducted with learners in elementary classrooms on both the use of and the student creation of science comics. During the classroom-based research featured in this article, Grade 4 students designed ocean threat comics for the culminating activity of an interdisciplinary Ocean Literacy unit, one component of a larger study. Throughout the research, the students were afforded with opportunities to develop their visual meaning-making skills and competences, as well as their aesthetic understanding of and critical thinking about multimodal ensembles through participation in activities that focused on various elements of visual art and design, and conventions of the medium of comics. The visual and descriptive analysis of one student’s ocean threat comics, which includes excerpts from the interview about her work, reveals her motivations for selecting and orchestrating specific semiotic resources to represent and express particular meanings that realized her objectives as a sign-maker. Overall, the descriptions of the pedagogy featured during the research and the student’s ocean threat comics demonstrate how the development of student knowledge about elements of visual art and design, and conventions of the medium of comics can inform and deepen students’ semiotic work of comprehending, interpreting and designing science comics.
X-ray crystal structures of carbonate and hydroxide bridged MnII/MgII heterobimetallic complexes formed by reduction of CO2 or H2O by a Mn0–MgII bonded compound
Authors: Hicks Jamie , Juckel Martin , Jones Cameron 
Published: October 2021

Abstract
The previously reported Mn0–MgII bonded heterobimetallic compound [L†Mn–Mg(MesNacnac)] (L† = −N(Ar†)(SiPri
3), Ar† = C6H2{C(H)Ph2}2Pri-2,6,4; MesNacnac = [(MesNCMe)2CH]−; Mes = mesityl) forms an adduct complex, [L†Mn–Mg(THF)(MesNacnac)], when dissolved in THF. Adventitious water is shown to be reduced by [L†Mn–Mg(MesNacnac)] to give the hydroxide bridged heterobimetallic, [L†Mn(μ-OH)2Mg(MesNacnac)]. The Mn0–MgII bonded heterobimtallic reductively disproportionates CO2, affording the carbonate bridged species, [{L†Mn(μ-CO3)Mg(THF) (MesNacnac)}2], in the presence of THF. The three new compounds have been crystallographically characterized.
A mixture-density-based tandem optimization network for on-demand inverse design of thin-film high reflectors
Authors: Unni Rohit , Yao Kan , Han Xizewen , Zhou Mingyuan , Zheng Yuebing 
Published: October 2021

Abstract
Deep learning (DL) has emerged as a promising tool for photonic inverse design. Nevertheless, despite the initial success in retrieving spectra of modest complexity with nearly instantaneous readout, DL-assisted design methods often underperform in accuracy compared with advanced optimization techniques and have not proven competitive in handling spectra of practical usefulness. Here, we introduce a tandem optimization model that combines a mixture density network (MDN) and a fully connected (FC) network to inversely design practical thin-film high reflectors. The multimodal nature of the MDN gives access to infinite candidate designs described by probability distributions, which are iteratively sampled and evaluated by the FC network to allow for rapid optimization. We show that the proposed model can retrieve the reflectance spectra of 20-layer thin-film structures. More interestingly, it reproduces with high precision the periodic structures of high reflectors derived from physical principles, even though no such information is included in the training data. Improved designs with extended high-reflectance zones are also demonstrated. Our approach combines the high-efficiency advantage of DL with the optimization-enabled performance improvement, enabling efficient and on-demand inverse design for practical applications.
Research on vibration monitoring and fault diagnosis of rotating machinery based on internet of things technology
Authors: Zhang Xiaoran , Rane Kantilal Pitambar , Kakaravada Ismail , Shabaz Mohammad 
Published: October 2021

Abstract
Recently, researchers are investing more fervently in fault diagnosis area of electrical machines. The users and manufacturers of these various efforts are strong to contain diagnostic features in software for improving reliability and scalability. Internet of Things (IoT) has grown immensely and contributing for the development of recent technological advancements in industries, medical and various environmental applications. It provides efficient processing power through cloud, and presents various new opportunities for industrial automation by implementing IoT and industrial wireless sensor networks. The process of regular monitoring enables early detection of machine faults and hence beneficial for Industrial automation by providing efficient process control. The performance of fault detection and its classification by implementing machine-learning algorithms highly dependent on the amount of features involved. The accuracy of classification will adversely affect by the dimensionality features increment. To address these problems, the proposed work presents the extraction of relevant features based on oriented sport vector machine (FO-SVM). The proposed algorithm is capable for extracting the most relevant feature set and hence presenting the accurate classification of faults accordingly. The extraction of most relevant features before the process of classification results in higher classification accuracy. Moreover it is observed that the lesser dimensionality of propose process consumes less time and more suitable for cloud. The experimental analysis based on the implementation of proposed approach provides and solution for the monitoring of machine condition and prediction of fault accurately based on cloud platform using industrial wireless sensor networks and IoT service.
Mechanical properties and structural health monitoring performance of carbon nanotube-modified FRP composites: A review
Authors: Li Jianbin , Zhang Zhifang , Fu Jiyang , Liang Zhihong , Ramakrishnan Karthik Ram 
Published: October 2021

Abstract
Fiber-reinforced polymer composites are high-performance materials used extensively in aerospace and defense industries. Researchers have added various nanoscale materials to FRPs for improving their mechanical properties and to prepare multifunctional composites. Carbon nanotubes (CNTs) with their high strength, high modulus, and large aspect ratio have emerged as a frontrunner in the nano-reinforcements, and there is a large volume of published research on this topic. This article provides an extensive review of key publications covering topics of fabrication methods, enhancement of mechanical properties, and applications of CNT-modified FRP materials in structural health monitoring. A description of the main methods of adding CNTs into FRP materials, including dispersion in the resin and film lay-up, is presented. A key focus of the review is the effect of CNTs on the mechanical properties of FRP composites, including interlaminar fracture toughness, impact resistance, and fatigue properties. Since CNTs have self-sensing properties, there is potential to use CNTs for nondestructive identification (NDI) and structural health monitoring (SHM) of composite structures. Finally, a discussion of the problems that might be encountered during the use of CNTs as nano-reinforcements in FRP, and the future application potential of CNT-modified FRP materials is reported.
Multimodal practices for negative assessments as delicate matters: Incomplete syntax, facial expressions, and head movements
Authors: Li Xiaoting 
Published: October 2021

AbstractThis paper contributes to the discussion of fuzzy boundaries by investigating negative assessments of the recipient and non-present parties that are syntactically incomplete. Particularly, it explores how the speaker uses syntax and bodily visual conduct to accomplish the delicate action of negatively assessing others and to solicit the recipient to collaboratively complete negative assessments. Based on an examination of approximately 5 h of everyday Mandarin face-to-face conversations, the study shows that incomplete syntax, facial expressions, and head shakes constitute multimodal practices in making negative assessments of the recipient and a non-present third party. Leaving assessments syntactically incomplete and displaying negative evaluative stance through facial expressions such as lip-pursing and eyebrow furrows and head shakes show the speaker’s orientation to the negative assessments as a delicate action. The facial expressions after incomplete syntax demonstrate that participants orient to the hesitation in the delivery of a TCU/turn-in-progress not asproductionproblem, but rather aninteractionalproblem. This study shows that the boundaries of assessment turns may be blurry, and that one assessment may be collaboratively produced by two participants, which exemplifies a specific aspect of weak cesuras and fuzzy boundaries of units and actions in interaction.
Knocking characteristics of a high pressure direct injection natural gas engine operating in stratified combustion mode
Authors: Zhang Qiang , Yang Yubo , Jia Demin , Li Menghan 
Published: October 2021

Abstract
Knocking becomes an increasingly important issue in direct injection natural gas engines with the application of new combustion modes. In this article, the knocking characteristics of natural gas engine operating in stratified combustion mode were studied with the aid of cylinder pressure oscillations and combustion parameters. The results indicated that knocking tendency will be stronger when operating in stratified combustion mode. The first to the fourth circumferential modes and the first radial mode are the featured modes for knocking behavior, while knocking is more serious when the duration of 10–50% of total energy released is shorter.
Recent progress in decontamination system against chemical and biological materials: challenges and future perspectives
Authors: Bhatti Saeed Akhtar , Memon Fida Hussain , Rehman Faisal , Bhatti Zubeda , Naqvi Tehsin , Thebo Khalid Hussain 
Published: October 2021

AbstractEnvironmental contamination is one of the key issues of developing countries in recent days, and several types of methods and technologies have been developed to overcome these issues. This paper highlights the importance of decontamination in a contaminated environment that normally precedes protection, detection and identification followed by medical support. Further, this paper especially focuses on individual and collective NBC decontamination required on navy ships and correspondingly presents solutions (viable and economical) through the use of indigenously developed decontamination equipment. The paper also highlights the integration of various decontamination technologies with pre-existing ship decontamination systems, indicating the need for various decontaminants. Finally, we will also focus on new decontamination systems based on nanomaterials and enzymes and their utilization.
faunal assemblage from the manufacturing district at Spolverino: from the Roman Imperial period to Late Antiquity
Authors: ANICETI VERONICA , ALBARELLA UMBERTO , SEBASTIANI ALESSANDRO 
Published: October 2021

This paper presents a zooarchaeological analysis from the site of Spolverino (southern Tuscany, Italy). Archaeological excavations have uncovered a complex stratigraphy dated from the Roman Imperial period to Late Antiquity (late 1st- early 6th centuries AD). The industrial function of the site in Imperial times is partially reflected in the nature of the faunal assemblage. In Late Antiquity, Spolverino lost its original manufacturing functions, as many of the workshops were abandoned; our evidence, however, suggests that some livestock was kept, probably managed by a restricted group of people still living in that area. Some hunting was practiced throughout the occupation but it increased in the later periods. Remarkable, in Late Antiquity, is the occurrence of the fallow deer, an introduced species, rare in Roman contexts.
Gyorsreagálás a pandémiára, ellátásbiztonság
Authors: Greiner István 
Published: October 2021

Összefoglaló. A tavalyi évben kitört COVID–19 pandémia jelentős
kihívások elé állította a világot. Nem pusztán a kormányok és az egészségügyi
rendszerek szembesültek új, békeidőben eddig még nem gyakorolt feladatokkal, de
a tudományos világnak is át kellett tekinteni mind a régi, mind a legmodernebb
eszközöket ahhoz, hogy a vírus terjedésének, a betegek szenvedéseinek, a tömeges
halálozásoknak végre véget lehessen vetni. Habár a járványnak még messze nincsen
vége, és egyre újabb és újabb mutánsok ütik fel a fejüket a világ legkülönbözőbb
részein, mégis azokat a tanulságokat, melyek már összegyűltek a gyógyszeripar
területén, érdemes összefoglalni. Talán még ennél is fontosabb azonban, hogy
azokat a hiányokat, amelyeket még be kell pótolni, szintén megemlítsük, hogy
ezzel is segítsük az újabb hullámok vagy járványok leküzdését.
Summary. During the last 12 months the most serious issue was the
SARS-CoV-2 virus generated pandemia around the world. There is no country which
could be more or less intact and a huge amount of resources was sacrificed to
rescue people from the fatal outcome of this disease. When it started a year ago
or more, there were doubts about its future but later it was realised that this
is an epidemic occurring worldwide, crossing international boundaries, and
affecting a large number of people. According to the WHO, today the number of
confirmed cases is about 157.8 million, confirmed deaths are 3.3 million and 1.2
billion vaccine doses have been administered. These numbers clearly show how
important it is to elaborate the reaction of the pharma industry and investigate
how to ensure safe drug supply for patients in every country. The topics
discussed below are the basic and unique features of the SARS-CoV-2 virus, the
pandemia generated by it, and the role of the Hungarian pharma industry,
especially Gedeon Richter plc, during this critical period. On one hand the
author explains how the spread of virus can be decreased in general and at a
production facility like Richter, and on the other hand R&D activity of the
Company aiming to cure patients suffering from COVID-19 infection. Consortia
including universities, academia and industrial entities made a substantial
impact on handling this terrible epidemic. Gedeon Richter plc, the biggest and
only independent Hungarian pharma company, in keeping with its roots started
small molecule R&D to make favipiravir and remdesivir available to clinics.
The latter production is a very difficult one but using its background in
chemistry Richter was able to manage all R&D and industrial scale up
activities in six months. Moreover, it has filed two patent applications about
its new, more feasible and economical process steps justifying its innovative
attitude. As a final conclusion it is stated that for the safe supply of
necessary medication one critical step is missing from the capabilities of the
Hungarian pharma industry, the vaccine R&D and production.
On Zero Determinant Matrices that are Full
Authors: Călugăreanu Grigore , Pop Horia F. 
Published: October 2021

Column-row products have zero determinant over any commutative ring. In this paper we discuss the converse. For domains, we show that this yields a characterization of pre-Schreier rings, and for rings with zero divisors we show that reduced pre-Schreier rings have this property.Finally, for the rings of integers modulo n, we determine the 2x2 matrices which are (or not) full and their numbers.
Jobb kamrai adaptáció pulmonalis artériás hypertoniában
Authors: Csósza Györgyi , Lázár Zsófia , Rozgonyi Zsolt , Vágó Hajnalka , Losonczy György , Müller Veronika , Karlócai Kristóf 
Published: October 2021

Összefoglaló. Pulmonalis artériás hypertoniában (PAH) a tüdőartériák
falának átépülése az elsődleges patofiziológiai eltérés, amely a pulmonalis
vascularis rezisztencia (PVR) és a pulmonalis nyomás progresszív emelkedéséhez
vezet. Ez a nyomásemelkedés a jobb szívfélben az afterload fokozódásához vezet,
ami hosszú távon jobbkamra-diszfunkciót és jobbszívfél-elégtelenséget okoz. Az
egyre növekvő PVR mellett kialakuló cardialis adaptáció pontos patomechanizmusa
nem ismert, de egyes betegek esetén nagyon eltérő lehet az adaptáció mértéke és
kialakulásának üteme. A kialakuló myocardium-hypertrophia és -dilatáció mértéke
nagyban függ a PAH etiológiájától, de emellett egyéb tényezők – mint az életkor,
a neurohumoralis aktiváció mértéke, genetikai és epigenetikai faktorok – is
jelentősen befolyásolják. Minél kevésbé képes a jobb kamra megtartani funkcióját
az egyre növekvő ellenállással szemben, annál gyorsabban alakul ki a
jobbszívfél-elégtelenség, és annál rosszabbak a beteg életkilátásai. Ezen
folyamatok jobb megismerése klinikai jelentőséggel bír, mivel a jobb kamrai
adaptáció elősegítése javíthatja a betegség kimenetelét. Orv Hetil. 2021;
162(37): 1485–1493.
Summary. Remodeling of the pulmonary artery wall is the primary
pathophysiological abnormality in pulmonary arterial hypertension leading to a
progressive increase in pulmonary vascular resistance (PVR) and pulmonary
arterial pressure. The elevation of pressure increases the afterload in the
right heart, causing right ventricular dysfunction and right heart failure in
the long term. The exact pathomechanism of cardiac adaptation with increasing
PVR is unknown, but the degree and rate of adaptation may be very different in
patients suffering from pulmonary hypertension. The development of myocardial
hypertrophy and dilatation is highly dependent on the etiology of pulmonary
hypertension, but is also significantly influenced by other factors such as age,
degree of neurohumoral activation, and genetic and epigenetic factors. Right
heart failure develops and life expectancy shortens if the right ventricle is
unable to maintain its function in the face of increasing resistance. Orv Hetil.
2021; 162(37): 1485–1493.
KEGIATAN PENYULUHAN PERIKANAN DI KECAMATAN GEBANG KABUPATEN CIREBON
Authors: Mustaqim Nurhadi Ali , Nuraini Yenni 
Published: October 2021

ABSTRAK Kecamatan Gebang merupakan salah satu kecamatan di Kabupaten Cirebon yang memiliki potensi perikanan yang cukup tinggi. Hal tersebut di dukung oleh sumber daya alam yang sangat mendukung kegiatan perikanan dengan adanya pesisir laut pantura menjadikan kecamatan ini sebagai lokasi agrowisata dan agribisnis perikanan. Besarnya potensi perikanan di daerah ini menjadikan penyuluhan tentang perikanan menjadi salah satu aspek penting yang dapat menunjang peningkatan pemberdayaan potensi perikanan seperti kelompok budidaya garam, kelompok nelayan, kelompok pembudidaya ikan di Kecamatan Gebang Kabupaten Cirebon. Penyuluhan perikanan memiliki peran strategis dalam pembangunan kelautan dan perikanan yang berkelanjutan, sebagai sistem pendidikan non formal berperan dalam transformasi perilaku pelaku utama dan pelaku usaha dalam pengembangan usaha kelautan dan perikanan yang lebih baik. Kegiatan penelitian yang dilaksanakan di Kecamatan Gebang antara lain perencanaan, pelaksanaan (aksi penyuluhan), dan evaluasi. Kegiatan perencanaan meliputi pengumpulan data potensi perikanan dan penyusunan program kerja yang akan dilakukan. Pelaksanaan (aksi penyuluhan) yang dilakukan meliputi pertemuan kelompok, kunjungan kelompok, pendataan kartu kusuka, pendampingan program bantuan dari dinas, dan demonstrasi cara pengolahan hasil perikanan. Kegiatan evaluasi dilakukan sebelum dan sesudah pelaksanaan aksi penyuluhan, aspek yang dinilai meliputi aspek sikap, pengetahuan, dan keterampilan dengan instrument evaluasi berupa kuisioner. Kata kunci: Penyuluhan perikanan, Kegiatan penyuluhan