bluuebunny/crossref_metadata_2025 huggingface dataset:
Fiber Placement für die Serie
Authors: Krauter Uwe
Published: September 2021

Ein für den Flugzeugbau entwickelter Verlegekopf und die im Automobilbau standardisierte Automa- tisierungstechnik bilden den Kern des weltweit ersten CNC-Fiber-Placement-Zentrums für die Verarbeitung von Towpregs zu endkonturnahen Stacks für Strukturbauteile. Das Zentrum ist kompakt, einfach und robust aufgebaut. Es liefert reproduzierbar hohe Produktqualität bei drastisch reduziertem Mate- rialeinsatz und die für die automobile Serienfertigung unabdingbare Prozesssicherheit.
GFK mit ästhetisch anspruchsvollen Oberflächen
Authors: Vogel Gerhard
Published: September 2021

Glasfaserverstärkte Verbundwerkstoffe mit thermoplastischer Matrix lassen hinsichtlich ihrer Ober- flächen-Ästhetik noch Wünsche offen. Das liegt daran, dass die Glasfasern beim Abkühlen ein erheblich geringeres Schwindungsverhalten aufweisen als die oft semikristalline Polymer-Matrix. Dadurch zeichnen sich Unregelmäßigkeiten in der Faserstruktur überproportional auf der Oberfläche des Bauteils ab. Doch das muss nicht so bleiben: Auf der von der Messe Bremen veranstalteten ITHEC 2016 stellt Pierre Juan, Composite Project Director bei Ineos Styrolution, anhand von ersten Forschungsergebnissen neue Styrol-Copolymere für die Matrix der Composites vor, die sowohl den strukturellen als auch ästhetischen Anforderungen gerecht werden.
Gestaltfestigkeit gehärteter Passfederverbindungen/Fatigue Strength of Hardened Feather Key Connections
Authors: Leidich Erhard , Hofmann Stefan
Published: September 2021

Die Passfederverbindung (PFV) zählt nach wie vor zu den gebräuchlichsten formschlüssigen Verbindungen im Bereich der Antriebstechnik. Insbesondere die einfache Montage und Demontage sowie die relativ einfache Fertigung begründen den häufigen Einsatz dieser Verbindung. Darüber hinaus wird aus Sicherheitsgründen vielfach der Formschluss als redundante Maßnahme zum Kraftschluss gefordert. PFV mit „weicher“ Welle wurden in den letzten 20 Jahren umfassend hinsichtlich der Gestaltfestigkeit untersucht [1-3]. Die nunmehr in DIN 743 [4] enthaltenen und ursprünglich pragmatisch aus Praxisbeispielen abgeleiteten Kerbwirkungszahlen gelten damit als validiert. Gleichwohl ist festzustellen, dass nicht alle maßgebenden Einfluss- parameter (z. B. bezogenes Übermaß x, Verhältnis tm/sba) von den Kennwerten in DIN 743 explizit erfasst werden. Dies gilt auch für PFV mit gehärteter Welle, für die bisher keine gesicherten Versuchswerte existieren. Im Rahmen der Forschungsvereinigung Antriebstechnik e.V. (FVA) wurden diesbezüglich umfangreiche Untersuchungen durchgeführt [5], über die nachfolgend auszugsweise berichtet wird.

 

Feather key connections remain one of the most common positive-locking connections in the field of drive technology. The frequent use of this connection is justified in particular by the ease of assembly and disassembly as well as by the relative ease of manufacture. Furthermore, in many cases the positive-locking connection is used as a redundant measure to back up a non-positive connection for safety reasons. In the last 20 years, feather key connections with „soft” shafts have been investigated extensively with respect to their fatigue strength [1–3]. The fatigue notch factors now included in DIN 743 [4], which were originally derived pragmatically from practical examples, are thus considered validated. Nevertheless, it is clear that not all controlling influencing factors (e.g. relative oversize x, tm/sba ratio) are explicitly covered by the characteristics in DIN 743. This also applies to feather key connections with hardened shafts, for which no certain test values have existed up to now. The following report provides excerpts from the extensive investigations performed within the context of the Research Association for Drive Technology (Forschungsvereinigung Antriebstechnik e.V., FVA) [5].
Direktverschraubungen von Lasersinterbauteilen im Automobilbau/Direct Screw Coupling of Laser-Sintered Parts in Automotive Industry
Authors: Fieger Thiemo , Nugara Dominik , Fischer Sven , Witt Gerd
Published: September 2021

Inhalt: Das Lasersintern hat großes Potenzial eine bahnbrechende Technologie in der modernen Fertigung zu werden. Um sie im Automobilbau flächendeckend einsetzen zu können, ist eine Prüfung der Bauteile und deren Verbindungsschnittstellen notwendig. Die hier vorgestellten Versuche zeigen erstmals das Verhalten von Direktverschraubungen hergestellt durch das Lasersintern.
Energiesparen mit frequenzumrichtergesteuerten Meerwasserpumpen
Authors: Strate J.-C.
Published: September 2021

Kühlsysteme an Bord von Schiffen sind unverzichtbar für die Haupt- und Nebenantriebe. Durch das genutzte Medium Meerwasser sind sie sehr große Verbraucher: Ihre Funktion ist in der Regel überdimensioniert, da auch auf hohe Meerestemperaturen ausgelegt. Weil nicht alle Schiffe in den Tropen unterwegs sind, spart eine bedarfsgerechte Regelung des Kühlwasserdurchflusses deswegen viel Energie (Bild 1).
Rüttelfeste Energiezuführung in automatisierter Tiefbohranlage
Authors: Cyrus O.
Published: September 2021

Mit dem Tiefbohrsystem TBA 440 M2 hat die Bauer Maschinen GmbH eine Anlage entwickelt, die weitestgehend selbsttätig Bohrungen bis in 6000 Meter Tiefe abteufen kann und als „Walking Unit“ mit rund 1000 Tonnen Gesamtgewicht sogar in der Lage ist, den Standort zu wechseln (Bild 1). Das Handhabungssystem, das die Bohrgestänge zuführt, wird über E4.1-Energieketten von igus mit hydraulischer und elektrischer Energie sowie mit Steuersignalen versorgt.
Social Trust-based Blockchain-enabled Social Media News Verification System
Authors: Fitri Sari Riri , Ilmananda Asri , Romano Daniela
Published: September 2021

In the current digital era, information exchanges can be done easily through the Internet and social media. However, the actual truth of the news on social media platforms is hard to prove, and social media platforms are susceptible to the spreading of hoaxes. As a remedy, Blockchain technology can be used to ensure the reliability of shared information and can create a trusted communications environment. In this study, we propose a social media news spreading model by adapting an epidemic methodology and a scale-free network. A Blockchain-based news verification system is implemented to identify the credibility of the news and its sources. The effectiveness of the model is investigated by utilizing agent-based modelling using NetLogo software. In the simulations, fake news with a truth level of 20% are assigned a low News Credibility Indicator (NCI ± -0.637) value for all of the different network dimensions. Moreover, the Producer Reputation Credit is also decreased (PRC ± 0.213) so that the trust factor value is reduced. Our epidemic approach for news verification has also been implemented using Ethereum Smart Contract and several tools such as React with Solidity, IPFS, Web3.js, and Metamask. By showing the measurements of the credibility indicator and reputation credit to the user during the news dissemination process, this proposed smart contract can effectively limit user behaviour in spreading fake news and improve the content quality on social media.
First record of the lac-producing species Kerria nepalensis Varshney (Hemiptera, Kerriidae) from China, with a key to Chinese species
Authors: Bashir Nawaz Haider , Wang Weiwei , Liu Juan , Wang Wei , Chen Hang
Published: September 2021

Lac insects include astonishing species responsible for lac production. Lac is composed of resins, dyes, and shellac wax with significant economic importance. Previously, 11 species of the genusKerriawere reported from China, with the highest species diversity in Yunnan province. Another lac-producing species of the genusKerria, namelyKerria nepalensisVarshney, is recorded for the first time in Yunnan province, China, onDalbergia cochinchinensisPierre ex Laness. (Fabaceae), a new host plant. In addition, a key to the 12Kerriaspecies recorded in China is also given.
La dynamique de montée en maturité des ruptures technologiques
Authors: Grison Xavier
Published: September 2021

Cet article examine une douzaine de ruptures technologiques, concrétisées aux XX e et XXI e  siècles pour identifier les caractéristiques génériques de leur montée en maturité. Cette dynamique est similaire à celle d’une rupture de fatigue : elle est précédée d’un long travail, dont la durée s’exprime en décennies. Elle est aussi détectable à l’avance. En revanche, ces exemples contredisent l’idée d’une accélération technologique actuelle. Enfin, cet article examine les freins souvent rencontrés dans la montée en maturité des ruptures technologiques, et sur la façon de les limiter : garder un volume de recherche dédié aux avancées à long terme et améliorer le dialogue, à tous les niveaux, entre les militaires et les ingénieurs de la Direction générale de l’armement (DGA).
Les enjeux stratégiques de la France aux frontières orientales de l’Europe
Authors: Pattier Loïc
Published: September 2021

L’attitude à adopter face à la Russie et à la Turquie divise profondément les États européens et illustre leur absence assumée de vision stratégique autonome. Or, la compétition sino-américaine devrait conduire les États-Unis à transférer aux alliés européens le fardeau sécuritaire de leur voisinage africain et moyen-oriental. D’ici vingt ans, les nations européennes seront-elles en mesure de monter simultanément la garde à l’Est tout en agissant seules dans leur voisinage méridional ? La « nouvelle guerre froide » avec la Russie va-t-elle dégénérer ? La politique étrangère turque sera-t-elle un facteur chronique d’instabilité ? Comment adapter les stratégies militaires pour répondre aux défis que ces puissances poseront ?
Regards sur cent ans de comparatisme
Authors: Pageaux Daniel-Henri
Published: September 2021

On a souhaité donner d’abord, de façon tout à la fois précise et synthétique, un historique de la RLC , en insistant sur les orientations intellectuelles, voire philosophiques qui ont présidé à sa fondation, puis en donnant un panorama aussi détaillé que possible des questions et des thèmes abordés, en particulier à partir des numéros dits « spéciaux ». En un siècle, la RLC a su tenir, tant au plan national qu’international, un rôle et une fonction de tribune, de lieu permanent d’échanges, de propositions et de réflexions.
Fernand Baldensperger et les premières définitions de la littérature comparée
Authors: Franco Bernard
Published: September 2021

Dans le tout premier article de la Revue de Littérature Comparée publié peu de temps après la fin de la Première Guerre mondiale, Fernand Baldensperger propose une définition de la littérature comparée imprégnée d’un idéal humaniste qui a traversé l’histoire de la discipline. Il la rapproche de la méthode de l’histoire littéraire prônée par Lanson et de l’« histoire comparée des littératures » évoquée par Joseph Texte, dans une relation ambivalente d’opposition avec la méthode des parallèles. Une telle conception est proche des origines romantiques de la discipline, qu’il s’agisse des premières définitions de la littérature comparée chez Ampère ou du relativisme esthétique propre à la critique romantique en général. Mais dans sa volonté d’embrasser les sciences humaines, Baldensperger défend également une conception de la discipline bien plus moderne qu’on ne l’a souvent dit.
Paul Hazard, l’amour d’une vie pour les littératures du Nord
Authors: Crosnier Étienne
Published: September 2021

Né à Noordpeene, près de Dunkerque, Paul Hazard (1878-1944), ancien élève de l’ENS et agrégé de Lettres classiques, est considéré aujourd’hui comme le grand spécialiste de la littérature italienne du XVIII e siècle. Sa thèse de doctorat, La Révolution française et les lettres italiennes (1789-1815) , en est la pierre angulaire. Mais Paul Hazard ne s’est jamais détourné de ses premières amours, les littératures nordiques. Il met ainsi en lumière, dans « L’invasion des littératures du Nord dans l’Italie du XVIII e siècle » ( RLC , 1921), l’influence et la modernité des œuvres d’Ossian, Shakespeare et Goethe. Avant de nous surprendre avec un essai, Le Charme d’Andersen (1930), qui révèle, au-delà de son attachement aux littératures enfantines, l’humanisme profond de l’enseignant et du chercheur qu’il n’a jamais cessé de manifester dans ses écrits.
Vingt-cinq ans après : le recommencement
Authors: Chevrel Yves
Published: September 2021

Durant l’occupation de la France par les nazis, de 1940 à 1945, la direction de la RLC a décidé de ne pas publier la revue. L’année suivante en Grande-Bretagne parait, à Cardiff, une revue qui en assure l’intérim : Comparative Literature Studies . F. Baldensperger y publie, en 1945, un article où il revient sur les débuts de la RLC , en rappelant les espoirs soulevés par la fin de la « Grande Guerre » et en les confrontant aux réalités qui ont suivi. De son côté, J.-M. Carré titre « Recommencement » l’article de tête de la première livraison de la RLC à reparaître en 1946. Les deux articles, de tonalités différentes, manifestent l’un et l’autre la volonté de concevoir la littérature comparée comme une discipline au service d’un humanisme moderne.
A new parallel data geometry analysis algorithm to select training data for support vector machine
Authors: Shi Yunfeng ,   School of Mathematical Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China, Lv Shu , Shi Kaibo ,   Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China,   School of Electronic Information and Electrical Engineering Chengdu University, Sichuan Chengdu 610106, China
Published: September 2021

Support vector machine (SVM) is one of the most powerful technologies of machine learning, which has been widely concerned because of its remarkable performance. However, when dealing with the classification problem of large-scale datasets, the high complexity of SVM model leads to low efficiency and become impractical. Due to the sparsity of SVM in the sample space, this paper presents a new parallel data geometry analysis (PDGA) algorithm to reduce the training set of SVM, which helps to improve the efficiency of SVM training. The PDGA introduce Mahalanobis distance to measure the distance from each sample to its centroid. And based on this, proposes a method that can identify non support vectors and outliers at the same time to help remove redundant data. When the training set is further reduced, cosine angle distance analysis method is proposed to determine whether the samples are redundant data, ensure that the valuable data are not removed. Different from the previous data geometry analysis methods, the PDGA algorithm is implemented in parallel, which greatly saving the computational cost. Experimental results on artificial dataset and 6 real datasets show that the algorithm can adapt to different sample distributions. Which significantly reduce the training time and memory requirements without sacrificing the classification accuracy, and its performance is obviously better than the other five competitive algorithms.
On generalizations of quantum Simpson's and quantum Newton's inequalities with some parameters
Authors: Promsakon Chanon ,   Department of Mathematics, Faculty of Applied Science, King Mongkut's University of Technology North Bangkok, Bangkok, 10800, Thailand, Ali Muhammad Aamir , Budak Hüseyin , Abbas Mujahid , Muhammad Faheem , Sitthiwirattham Thanin ,   Jiangsu Key Laboratory for NSLSCS, School of Mathematical Sciences, Nanjing Normal University, Nanjing, 210023, China,   Department of Mathematics, Faculty of Science and Arts, Düzce University, Düzce-TURKEY,   Department of Mathematics, Government College University Lahore, Pakistan,   Department of Medical research, China Medical University Hospital, China, Medical University, Taichung, Taiwan,   Mathematics Department, Faculty of Science and Technology, Suan Dusit University, Bangkok, 10300, Thailand
Published: September 2021

In this paper, we prove two identities concerning quantum derivatives, quantum integrals, and some parameters. Using the newly proved identities, we prove new Simpson's and Newton's type inequalities for quantum differentiable convex functions with two and three parameters, respectively. We also look at the special cases of our key findings and find some new and old Simpson's type inequalities, Newton's type inequalities, midpoint type inequalities, and trapezoidal type inequalities.
On a new flexible Lomax distribution: statistical properties and estimation procedures with applications to engineering and medical data
Authors: Alotaibi Refah ,   Mathematical Sciences Department, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia, Okasha Hassan , Rezk Hoda , Almarashi Abdullah M. , Nassar Mazen ,   Department of Statistics, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia,   Department of Mathematics, Faculty of Science, Al-Azhar University, Nasr City, 11884, Cairo, Egypt,   Department of statistics, Faculty of Commerce, Al-Azhar University, Cairo, Egypt,   Department of Statistics, Faculty of Commerce, Zagazig University, Egypt
Published: September 2021

This paper introduces a new extension of the traditional Lomax distribution. The current distribution, which has one scale and two shape parameters, is known as logarithmic transformed Lomax distribution. The hazard rate function of the new distribution based on parameter values, making monotonically decreasing, upside-down and bathtub upside-down shaped. Some properties of the proposed distribution including mixture expansion, moments, entropies, probability weighted moments, order statistics, reversed failure rate and mean past life time are discussed. The distribution parameters are estimated using four frequentist methods: namely, maximum likelihood, least squares, weighted least squares, and maximum product of spacing. The efficiency of the different estimators is compared using a simulation analysis using mean square error. Finally, two real data sets for service times of Aircraft Windshield and survival times of a group of patients given chemotherapy medication are analyzed and compared to some other competing distributions. Based on the results of data analysis, the estimates of minimum and maximum values for the service times of Aircraft Windshield and the survival times of patients given chemotherapy medication are obtained.
Bounds on eigenvalues of perturbed Lamé operators with complex potentials
Authors: Cossetti Lucrezia ,   Karlsruher Institut für Technologie, Englerstraße 2, 76131 Karlsruhe, Germany
Published: September 2021

Several recent papers have focused their attention in proving the correct analogue to the Lieb-Thirring inequalities for non self-adjoint operators and in finding bounds on the distribution of their eigenvalues in the complex plane. This paper provides some improvement in the state of the art in this topic. Precisely, we address the question of finding quantitative bounds on the discrete spectrum of the perturbed Lamé operator of elasticity $ -\Delta^\ast + V $ in terms of $ L^p $-norms of the potential. Original results within the self-adjoint framework are provided too.
Fault Tree-Based Root Cause Analysis Used to Study Mal-Operation of a Protective Relay in a Smart Grid
Authors: Bentarzi Hamid
Published: September 2021

This chapter presents how root cause analysis based on fault tree technique can be used to study mal-operation of protective relay in a smart power grid. This approach is used to identify disturbances first and root cause of mal operation of protective relays which may lead to unnecessary tripping and hence to blackout. Once the critical root causes are identified, mitigation measures first such as blocking protection functions and digital filters may be used in view of increasing the reliability of the considered protection system. The proposed approach has many advantages as it allows obtaining an important quantitative figure (security). These permits to strongly strengthen the elements of the protecting system which are most likely appropriate to failure and hence the impact on the overall system's cost is significant. Another main advantage is that it takes into account the reliability of the software part of the system which is considered to have a significant contribution in the overall reliability of the protecting system.
Smart Grids and Hybrid Energy Storage Systems
Authors: Rabbani Muhammad Asif
Published: September 2021

It is very important that the installed renewable energy system should produce the maximum power outputs with minimum costs, and that can only be achieved with the selection of the best optimization technique applied for the best control strategies along with the introduction of the hybrid energy storage systems (HESS). This chapter presents some optimization techniques applied in control strategies for hybrid energy storage systems in distributed renewable energy systems. The integration of energy production and consumption component through the smart grid concept enables increased demand response and energy efficiency. Hybrid energy storage systems and their applications in the renewable energy systems are extensively discussed besides control strategies involved. The storages systems will play an important role in future related to smart grid.
A Machine Learning Approach for Anomaly Detection to Secure Smart Grid Systems
Authors: Singh Richa , Singh Arunendra , Bhattacharya Pronaya
Published: September 2021

The rapid industrial growth in cyber-physical systems has led to upgradation of the traditional power grid into a network communication infrastructure. The benefits of integrating smart components have brought about security issues as attack perimeter has increased. In this chapter, firstly, the authors train the network on the results generated by the uncompromised grid network result dataset and then extract valuable features by the various system calls made by the kernel on the grid and after that internal operations being performed. Analyzing the metrics and predicting how the call lists are differing in call types, parameters being passed to the OS, the size of the system calls, and return values of the calls of both the systems and identifying benign devices from the compromised ones in the test bed are done. Predictions can be accurately made on the device behavior in the smart grid and calculating the efficiency of correct detection vs. false detection according to the confusion matrix, and finally, accuracy and F-score will be computed against successful anomaly detection behavior.
Invisible Barriers, Undeclared Wars
Authors: Kurchenko Lina
Published: September 2021

Despite the indisputable progress of gender equality in academia in recent decades, the relative stagnancy of women's participation in decision making and resource distribution remains a global issue. There is growing evidence that a large part of gender inequality in higher education and research cannot be explained by explicit measurable factors. Male bias is encoded in societal and academic culture and to a significant extent determines subconscious choices and decisions benefiting men. This chapter analyses cultural reasons behind gender inequality and typifies them in a form of a matrix based on gendered attitudes to women's leadership in academia. The analysis of typical resistances reveals psychological and social mechanisms of subtle gender discrimination and is followed by a set of proposed preventive measures.
Focusing Interrelations of Education Plans and Social Inequality in Early Childhood
Authors: Nienhaus Sylvia
Published: September 2021

Contributing to research on social inequality in early childhood, this chapter addresses the relevance of education plans in institutional early childhood education and care (ECEC) towards fostering children's educational advancement. To do so, results are discussed from an ongoing research project focusing on 3-6-year-old children's social-emotional skills (SES, taken as an important marker of educational advancement). Next, taking a qualitative multilevel stance, interviews with ECEC providers' representatives in Lower Saxony, Germany were analyzed with regard to challenges in advancing SES, showing interrelations as well as discrepancies between ECEC politics and practice, questioning the impact of education plans on reducing social inequality in early childhood.
The Temporal Disciplining of Doctoral Research in the Neoliberal Academy
Authors: Grant-Smith Deanna , Winter Abbe
Published: September 2021

The neoliberal agenda in higher education has led to expectations and targets of market-likeness in student enrolment and completion demographics through the widening participation agenda. However, the reality is that disadvantaged groups such as students with a disability and Indigenous students are still underrepresented, particularly in advanced research degrees. This disadvantage is compounded by the temporal disciplining imposed by bureaucratically-defined completion deadlines. Taking Australia as a paradigmatic case, this chapter explores the temporal disciplining of doctoral research in the broader context of neoTaylorism and the projectification of research. It argues that a care-inspired slowness is needed to counterbalance the harms created by the managerialist push for ‘timely' completion.
Prediction of Skin Diseases Using Machine Learning
Authors: Arjaria Siddhartha Kumar , Raj Vikas , Kumar Sunil , Shrivastava Priyanshu , Kumar Monu , Cherian Jincy S.
Published: September 2021

Skin disease rates have been increasing over the past few decades. It has led to both fatal and non-fatal disabilities all around the world, especially in those areas where medical resources are not good enough. Early diagnosis of skin diseases increases the chances of cure significantly. Therefore, this work is comparing six machine learning algorithms, namely KNN, random forest, neural network, naïve bayes, logistic regression, and SVM, for the prediction of the skin diseases. The information gain, gain ratio, gini decrease, chi-square, and relieff are used to rank the features. This work comprises the introduction, literature review, and proposed methodology parts. In this research paper, a new method of analyzing skin disease has been proposed in which six different data mining techniques are used to develop an ensemble method that integrates all the six data mining techniques as a single one. The ensemble method used on the dermatology dataset gives improved result with 94% accuracy in comparison to other classifier algorithms and hence is more effective in this area.
Investigating the Critical Success Factors of Artificial Intelligence-Driven CRM in J. K. Tyres
Authors: Singh Surabhi , Santos José Duarte
Published: September 2021

AI-powered technologies allow online B2B companies to serve their customers with accurate and relevant information, 24/7. For example, they experience an increase in requests for information from customers on such aspects as product availability, features, or other services. The chapter aims to explore artificial intelligence in B2B business. The study employed qualitative research, and the data was collected through a focus group for data collection. An AI-powered chatbot enhanced with natural language processing and understanding conversationally-worded requests could instantaneously provide this information without a human representative. This is vital as the added uncertainty around the pandemic means business customers seek real answers and ways to adapt and fast. The findings suggest the critical success factors of AI-driven CRM in B2B markets. The limitations of the study include the data collection being restricted to one B2B company. The implications are that further study can be extended for exploring AI-based CRM in B2B markets.
Artificial Intelligence in Retail
Authors: Sharma Renu , Mohan Mamta , Mariappan Prabha
Published: September 2021

This chapter gives an overview of how artificial intelligence is used by the retail sector to enhance customer experience and to improve profitability. It provides information about the role of the pandemic in stimulating AI adoption by retailers. It deliberates on how AI tools help retailers to engage customers online and in stores. Firms gain better understanding of customers, design immersive experiences, and enhance customer lifetime value using cost-effective technology solutions. It discusses popular AI algorithms like recommendation algorithm, association algorithm, classification algorithm, and predictive algorithm. Popular applications in retail include chatbots, visual search, voice search engine optimisation, in-store assistance, and virtual fitting rooms.
Exploring the Possibilities of Artificial Intelligence and Big Data Techniques to Enhance Gamified Financial Services
Authors: Pérez-Juárez María A. , Aguiar-Pérez Javier M. , Alonso-Felipe Miguel , Del-Pozo-Velázquez Javier , Rozada-Raneros Saúl , Barrio-Conde Mikel
Published: September 2021

A lot of millennials have been educated in gamified schools where they played Kahoot several times per week, and where applications like Classcraft made them feel like the protagonists of a videogame in which they had to accumulate points to be able to level up. All those that were educated in a gamified environment feel it is natural and logical that gamification is used in all areas. For this reason, gamification is increasingly becoming important in different fields including financial services, bringing new challenges. Gamification allows financial institutions to provide personalized and compelling experiences. Big data and artificial intelligence techniques are called to play an essential role in the gamification of financial services. This chapter aims to explore the possibilities of using artificial intelligence and big data techniques to support gamified financial services which are essential for digital natives but also increasingly important for digital immigrants.
Finite Time Synchronization of Chaotic Systems Without Linear Term and Its Application in Secure Communication
Authors: Liu Shuru , Shang Zhanlei , Lei Junwei
Published: September 2021

A definition of finite time synchronization of chaotic system was proposed, and a special theorem was proposed to solve the difficult problem of constructing a finite time stable system. After that, a hybrid construction method was proposed by integrating a common stable system and a finite time stable system. That reveals how to construct a finite time stable system, and it is very useful in secure communication since the convergence time is a very important factor that will affect its application in engineering realization. Above theorem and method was applied in the chaotic synchronization and two kinds of synchronization methods were proposed with estimation of unknown parameters. At last, a secure communication scheme was constructed by using above finite time synchronous method of chaotic systems. Also, numerical simulation was done, and the rightness of all the above proposed theorems and methods was shown.
Enhanced Learning Experiences Based on Regulatory Fit Theory Using Affective State Detection
Authors: Karthika R.  , Jegatha Deborah L.
Published: September 2021

Predicting learners' affective states through the internet has great impact on their learning experiences. Hence, it is important for an intelligent tutoring system (ITS) to consider the learners' affective state in their learning models. This research work focuses on finding learners' frustration levels during learning. Motivating the learners appropriately can enhance their learning experiences. Therefore, the authors also bring in a strategy to respond to learners' affective states in order to motivate them. This work uses Behavioral theory for goal generation, and frustration index is calculated. Based on the frustration level of the learner, motivational messages are displayed to the learners using Regulatory fit theory. The authors evaluated the model using t-test by collecting learners' data from MoodleCloud. The results of the evaluation demonstrate that 80% of the learners' performance significantly increases statistically as an impact of motivational messages provided in response to the learners' frustration.
Inconsistency Detection-Based LOD in Smart Homes
Authors: Guebli Wassila , Belkhir Abdelkader
Published: September 2021

The emergence of the internet of things in the smart homes has given rise to many services to meet the user's expectations. It is possible to control the temperature, the brightness, the sound system, and even the security of the house via a smartphone, at the request of the inhabitant or by scheduling it. This growing number of “things” must deal with material constraints such as home network infrastructure, but also applicative due to the number of proposed services. The heterogeneity of users' preferences often creates conflicts between them like turn on and off light or using a heater and an air conditioner in the same time. To manage these conflicts, the authors proposed a solution based on linked open data (LOD). The LOD allows defining the relation between the different services and things in the house and a better exploitation of the attributes of the inhabitant's profile and services. It consists to find inconsistency relation between the equipment using the antonym thesaurus.
Biomedical Ontology Matching Through Attention-Based Bidirectional Long Short-Term Memory Network
Authors: Xue Xingsi , Jiang Chao , Zhang Jie , Hu Cong
Published: September 2021

Biomedical ontology formally defines the biomedical entities and their relationships. However, the same biomedical entity in different biomedical ontologies might be defined in diverse contexts, resulting in the problem of biomedicine semantic heterogeneity. It is necessary to determine the mappings between heterogeneous biomedical entities to bridge the semantic gap, which is the so-called biomedical ontology matching. Due to the plentiful semantic meaning and flexible representation of biomedical entities, the biomedical ontology matching problem is still an open challenge in terms of the alignment's quality. To face this challenge, in this work, the biomedical ontology matching problem is deemed as a binary classification problem, and an attention-based bidirectional long short-term memory network (At-BLSTM)-based ontology matching technique is presented to address it, which is able to capture the semantic and contextual feature of biomedical entities. In the experiment, the comparisons with state-of-the-art approaches show the effectiveness of the proposal.
Distal Lck Promoter–Driven Cre Shows Cell Type–Specific Function in Innate-like T Cells
Authors: Figueroa Maday G , Parker Loretta M , Krol Kamila , Zhao Meng
Published: September 2021

Innate-like T cells, including invariant NKT cells, mucosal-associated invariant T (MAIT) cells, and γ δ T (γδT) cells, are groups of unconventional T lymphocytes. They play important roles in the immune system. Because of the lack of Cre recombinase lines that are specific for innate-like T cells, pan–T cell Cre lines are often used to study innate-like T cells. In this study, we found that distal Lck promoter–driven Cre (dLckCre) in which the distal Lck gene promoter drives Cre expression in the late stage of thymocyte development has limited function in the innate-like T cells using ROSA26floxed-Stop-tdTomato reporter. Innate-like T cells differentiate into mature functional subsets comparable to the CD4+ Th subsets under homeostatic conditions. We further showed that dLckCre-expressing γδT cells are strongly biased toward γδT1 phenotype. Interestingly, the γδT cells residing in the epidermis and comprising the vast majority of dendritic epidermal T cells nearly all express dLckCre, indicating dLckCre is a useful tool for studying dendritic epidermal T cells. Taken together, these data suggest that Lck distal promoter has different activity in the conventional and unconventional T cells. The use of dLCKcre transgenic mice in the innate-like T cells needs to be guided by a reporter for the dLckCre function.
Prevalence of osteoporosis and osteoporotic fractures in postmenopausal women with type 2 diabetes mellitus
Authors: Oulkadi Lamia , Amine Bouchra , El binoune Imane , Rostom Samira , Bahiri Rachid
Published: September 2021

Type 2 diabetes mellitus (T2DM) and osteoporosis are chronic diseases with increasing prevalence. The aim of this study was to determine the prevalence of osteoporosis and osteoporotic fracture in women with T2DM and to identify predictive factors of fracture occurrence. The prevalence of osteoporosis and fractures in postmenopausal women with T2DM was 23.1% and 16.9%, respectively. 46.2% of T2DM patients had normal bone mineral density (BMD) (P<0.01) and 58.5% of control subjects had osteopenia (P<0.01). Incidence of fracture in T2DM patients with osteopenia was significantly increased versus control subjects when stratified according the BMD (P=0.009). By stratifying T2DM patients according to fractures, factors that were significantly associated with occurrence included T2DM duration (P=0.038), use of insulin (P=0.017), and lower BMD (P=0.048). Our study suggests that there was a higher prevalence of fracture in T2DM patients compared to control subjects and a significant difference in BMD was found between the groups. We also showed that insulin use, low BMD, and long duration of T2DM are factors associated with an increased risk of bone fracture.
High school learners views on benefits derived from attending career talks: Need for sound career guidance
Authors: Makola Zamandlovu S. , Saliwe Pumeza , Dube Itumeleng , Tabane Ramodungoane , Mudau Awelani V.
Published: September 2021

Tertiary institutions in South Africa are experiencing alarming undergraduate drop-out rates. This has partly been attributed to students’ inadequate preparation, and failure to gather information on, and planning for, their careers. The need for sound career guidance at the high school level is key, making the role of Life Orientation (LO) increasingly prominent. The aim of this study was to determine what benefits high school learners derive from attending career talks. To this end, a qualitative study was conducted with Grade 10 learners studying STEM (science, technology, engineering, and mathematics) at a township high school in Mamelodi, Tshwane. Data were collected using a qualitative questionnaire and analysed thematically. The findings demonstrated the importance of role models sharing information on their careers and work experiences. Another finding pertained to the importance of information on diverse careers, for the development of learners’ career self-efficacy as students of STEM in a township high school context. The findings highlight the importance of LO teachers organising career workshops. The study will benefit the Department of Basic Education, businesses, and employers as key stakeholders, by helping to enhance the career development of future employees and entrepreneurs.
To Compare the Effect of GnRH Agonist versus Human Chorionic Gonadotropin (HCG) Trigger on Clinical Pregnancy Rate in Intrauterine Insemination Cycle
Authors: Sharma Rashmi , Meena Imlesh
Published: September 2021

Context:

Gonadotropin-releasing hormone (GnRH) agonist trigger mimics the natural surge more closely with both luteinizing hormone (LH) and follicle-stimulating hormone surge. The present study attempts to find whether this apparent physiological advantage translates into the better pregnancy rate.

Aims:

To compare the effect of GnRH agonist versus human chorionic gonadotropin (hCG) trigger on the clinical pregnancy rate (CPR) in infertile women undergoing intrauterine insemination (IUI) with oral ovulogens.

Settings and Design:

Retrospective analysis at a tertiary care in vitro fertilization center.

Materials and Methods:

The records of 280 infertile women, who underwent IUI with oral ovulogens were analyzed. Women who received 0.2 mg triptorelin (GnRH agonist (GnRHa)) as trigger were categorised in Group A (n = 129) and those who received 10,000 IU urinary hCG in Group B (n = 151). The outcome in terms of CPR was studied.

Statistical Analysis Used:

The quantitative variables were compared using the independent t-test/Mann–Whitney test. The qualitative variables were compared using the Chi-square test. P < 0.05 was considered statistically significant.

Results:

There was a trend toward better CPR in Group A (21/129 – 16.28%) than in Group B (16/151 – 10.60%), although the difference was not found to be statistically significant (P – 0.162).

Conclusions:

There was a trend toward better CPR with the use of GnRH agonist trigger in IUI cycles with oral ovulogens in comparison to hCG trigger, although the difference was not found to be statistically significant. Further randomized controlled trials are needed to confirm these findings.
Short Ejaculatory Abstinence in Normozoospermic Men is Associated with Higher Clinical Pregnancy Rates in Sub-fertile Couples Undergoing Intra-Cytoplasmic Sperm Injection in Assisted Reproductive Technology
Authors: Gupta Sweta , Singh Vikram J , Fauzdar Ashish , Prasad Kamta , Srivastava Ajay , Sharma Kamlesh
Published: September 2021

Background:

The current WHO abstinence recommendations are ideal only for clinical diagnosis, as in recent years a negative correlation of abstinence duration with good embryo development and clinical pregnancy rate has been seen.

Aim:

The aim of the study was to evaluate the impact of variation in abstinence period on fertilization, embryo development potential, pregnancy, and miscarriage rate in sub-fertile couples undergoing assisted reproductive technology (ART) treatment.

Setting and Design:

A prospective analysis was conducted at a tertiary (level 3) infertility care clinic.

Materials and Methods:

The study included analysis of 1691 cycles for the patient undergoing ART procedures between September 2017 and August 2019. The influence of ejaculatory abstinence (EA) was investigated based on variation in abstinence length with four groups: Group I – 1 day; Group II – 2–5 days; Group III – 6–7 days; and Group IV – EA length of ≥8 days.

Statistical Analysis:

Analysis of variance and Chi-square test were used to calculate P value.

Results:

In our primary outcome, we have seen a strong positive correlation of abstinence duration with semen volume, total sperm count, total motile count, and difference between each group was significant. Secondary outcomes showed a significantly higher implantation rate, biochemical pregnancy rate was observed in Group I (1 day) per embryo transfer as compared to longer abstinence groups. This resulted in significantly higher clinical pregnancy rates in Group I 30.0% vs. 25.4% in comparison to longer abstinence groups.

Conclusions:

Our study has shown duration of abstinence is negatively correlated with positive β-human chorionic gonadotropin rate, clinical pregnancy rate, and implantation rate. Lower miscarriage rate was also observed with shorter abstinence duration.
A Szegő type theorem and distribution of symplectic eigenvalues
Authors: Bhatia Rajendra , Jain Tanvi , Sengupta Ritabrata
Published: September 2021

We study the properties of stationary G-chains in terms of their generating functions. In particular, we prove an analogue of the Szegő limit theorem for symplectic eigenvalues, derive an expression for the entropy rate of stationary quantum Gaussian processes, and study the distribution of symplectic eigenvalues of truncated block Toeplitz matrices. We also introduce a concept of symplectic numerical range, analogous to that of numerical range, and study some of its basic properties, mainly in the context of block Toeplitz operators.
Mapping class group actions from Hopf monoids and ribbon graphs
Authors: Meusburger Catherine , Voß Thomas
Published: September 2021

We show that any pivotal Hopf monoid

H

in a symmetric monoidal category

\mathcal{C}

gives rise to actions of mapping class groups of oriented surfaces of genus

g\geq 1

with

n\geq 1

boundary components. These mapping class group actions are given by group homomorphisms into the group of automorphisms of certain Yetter–Drinfeld modules over

H

. They are associated with edge slides in embedded ribbon graphs that generalise chord slides in chord diagrams. We give a concrete description of these mapping class group actions in terms of generating Dehn twists and defining relations. For the case where

\mathcal{C}

is finitely complete and cocomplete, we also obtain actions of mapping class groups of closed surfaces by imposing invariance and coinvariance under the Yetter–Drinfeld module structure.
Явное бризерное решение нелинейного уравнения Шредингера
Authors: Conte Robert
Published: September 2021

В компактном замкнутом виде записано выражение для трехпараметрического бризера нелинейного уравнения Шредингера. Это позволяет аналитически доказать удвоение периода решения по времени, наблюдаемого в экспериментах. Как результат, значительно упрощается экспериментальная проверка того, что некоторые импульсы, генерируемые в оптических волокнах, действительно являются такими обобщенными бризерами.
О задаче со свободной границей для релаксационного уравнения переноса
Authors: Takhirov Jozil Ostanovich , Umirkhonov Masudkhon Turakhonovich
Published: September 2021

Рассмотрена задача со свободной границей без начального условия для релаксационного уравнения переноса третьего порядка. Сначала задача сведена к задаче для уравнения второго порядка и доказана теорема единственности. Решение этой задачи строится как предел решений соответствующих задач, которые сначала сводятся к задаче типа Стефана с начальными условиями. Исследуется поведение свободной границы.
Многополюсное обобщение для эллиптических моделей интегрируемых взаимодействующих волчков
Authors: Trunina Elizaveta Sergeevna , Zotov Andrei Vladimirovich
Published: September 2021

Приводится обзор и подробное описание $gl_{NM}$ моделей Годена, связанных с голоморфными векторными расслоениями ранга $NM$ и степени $N$ на эллиптической кривой с $n$ проколотыми точками. Определяются их обобщения, построенные с помощью $R$-матриц, удовлетворяющих ассоциативному уравнению Янга-Бакстера. Приводится естественное обобщение полученных моделей на системы Шлезингера.
Явная конструкция $N=2$ суперконформных орбифолдов
Authors: Belavin Aleksandr Abramovich , Parkhomenko Sergei Evgen'evich
Published: September 2021

В рамках подхода Гепнера предложена конструкция моделей орбифолдов тензорного произведения двумерных минимальных теорий поля, обладающих $N=2$ суперконформной симметрией. Для построения моделей, удовлетворяющих требованиям модулярной инвариантности, в этой конструкции используется преобразование спектрального потока. Конструкция продемонстрирована на конкретном примере и показано, что ее применение обеспечивает модулярную инвариантность статсуммы одновременно с взаимной локальностью полей рассматриваемой теории.
Drug-Resistant Hyponatremia after Escitalopram Intake: A Series of Two Case Reports
Authors: Kacperczyk Justyna , Perdyan Adrian , Stompór Małgorzata
Published: September 2021

The consumption of new selective serotonin reuptake inhibitors (SSRIs) is raising dramatically especially in European countries. It contributes to occurrence of clinically important drug side effects. One of which can be hyponatremia. We present two case reports of 85-year-old and 84-year-old women who developed hyponatremia after escitalopram administration. We hypothesize that in both cases hyponatremia was connected with antidepressants administration. However, due to multiple comorbidities and polypharmacy it is often impossible to establish the exact mechanism of hyponatremia. Moreover, it is crucial to distinguish subtypes of drug-induced syndrome of inappropriate antidiuretic hormone hypersecretion (SIADH), such as SSRI-induced SIADH, reset osmostat SIADH, thiazide-associated hyponatremia, thiazide-induced hyponatremia, mineralocorticoid responsive hyponatremia of older adults, in order to properly diagnose and treat geriatric patients. Administration of antidepressants or thiazides should be followed by a regular monitoring of serum sodium level.