bluuebunny/crossref_metadata_2025 huggingface dataset:
Recovery of transversal metric tensor in the Schrödinger equation from the Dirichlet-to-Neumann map
Authors: Bellassoued Mourad , Rezig Zouhour
Published: December 2021

In this paper, we deal with the inverse problem of determining simple metrics on a compact Riemannian manifold from boundary measurements. We take this information in the dynamical Dirichlet-to-Neumann map associated to the Schrödinger equation. We prove in dimension \begin{document}$ n\geq 2 $\end{document} that the knowledge of the Dirichlet-to-Neumann map for the Schrödinger equation uniquely determines the simple metric (up to an admissible set). We also prove a Hölder-type stability estimate by the construction of geometrical optics solutions of the Schrödinger equation and the direct use of the invertibility of the geodesical X-ray transform.
A novel bond stress-slip model for 3-D printed concretes
Authors: He Chun-Hui , Liu Shu-Hua , Liu Chao , Mohammad-Sedighi Hamid
Published: December 2021

This paper considers the 3D printing process as a discontinuous control system and gives a simple and coherent bond stress-slip model for a new and intelligent building 3-D printed concrete. The previous models focused on either the maximal stress or the maximal slip, however, the novel model uses an energy approach by the dimension analysis, so that the main factors affecting the bond stress-slip relationship can be clearly revealed, mainly including the concrete's properties (its porous structure and its strength), the steel bar's properties (its printing direction, its strength, its surface roughness and its geometrical property) and the printing process. It is confirmed that the proposed model, similar to the constitutive relationship in elasticity, plays a key role in concrete mechanics, and it can conveniently explain the observed phenomena from the experiment.
Pricing catastrophe reinsurance under the standard deviation premium principle
Authors: Chao Wen ,   School of Management, Fujian University of Technology, Fuzhou 350108, China
Published: December 2021

Catastrophe reinsurance is an important way to prevent and resolve catastrophe risks. As a consequence, the pricing of catastrophe reinsurance becomes a core problem in catastrophic risk management field. Due to the severity of catastrophe loss, the Peak Over Threshold (POT) model in extreme value theory (EVT) is extensively applied to capture the tail characteristics of catastrophic loss distribution. However, there is little research available on the pricing formula of catastrophe excess of loss (Cat XL) reinsurance when the catastrophe loss is modeled by POT. In the context of POT model, we distinguish three different relations between retention and threshold, and then prove the explicit pricing formula respectively under the standard deviation premium principle. Furthermore, we fit POT model to the earthquake loss data in China during 1990–2016. Finally, we give the prices of earthquake reinsurance for different retention cases. The computational results illustrate that the pricing formulas obtained in this paper are valid and can provide basis for the pricing of Cat XL reinsurance contracts.
Subalgebra analogue of Standard bases for ideals in $ K[[t_{1}, t_{2}, \ldots, t_{m}]][x_{1}, x_{2}, \ldots, x_{n}] $
Authors: Jabeen Nazia ,   Department of Mathematical Sciences, Institute of Business Administration, Karachi, Pakistan, Khan Junaid Alam
Published: December 2021

In this paper, we develop a theory for Standard bases of $ K $-subalgebras in $ K[[t_{1}, t_{2}, \ldots, t_{m}]] [x_{1}, x_{2}, ..., x_{n}] $ over a field $ K $ with respect to a monomial ordering which is local on $ t $ variables and we call them Subalgebra Standard bases. We give an algorithm to compute subalgebra homogeneous normal form and an algorithm to compute weak subalgebra normal form which we use to develop an algorithm to construct Subalgebra Standard bases. Throughout this paper, we assume that subalgebras are finitely generated.
A class of lattice Boltzmann models for the Burgers equation with variable coefficient in space and time
Authors: Zhang Zongning ,   School of Mathematics and Information Science, North Minzu University, Yinchuan 750021, China, Li Chunguang , Dong Jianqiang ,   Zhengzhou University of Science and Technology, Zhengzhou, Henan 450000, China,   School of Civil Engineering, Hefei University of Technology, Hefei, Anhui 230009, China
Published: December 2021

In this paper, we study the numerical results of the Burgers equation with the variable coefficient in space and time and then put forward a lattice Boltzmann model of backward difference solution of nonlinear system. The macroscopic equation is recovered by using the Chapman-Enskog method and the direct Taylor-series expansion method. These two methods can recover the same hydrodynamic equations and analyze various nonlinear systems. In particular, it is much easier to perform error analysis by using the direct Taylor method. In this study, the two methods are used to analyze the Burgers equation with variable coefficient in space and time, the numerical results are discussed and are compared with the analytical solution. The numerical results verify the effectiveness of the model. The stability of the model ensures that we can use larger time step lengths. The improvement of lattice speed can improve the computational performance of the model, and the D1Q7 lattice performance is much better than the D1Q5 lattice performance.
O estado português, a marinha mercante e as colónias, 1926-1939
Authors: Santos Yvette
Published: December 2021

Este artigo pretende analisar de que forma se definiu a relação do governo ditatorial com as duas companhias portuguesas de navegação (Companhia Nacional de Navegação e Companhia Colonial de Navegação), no contexto da crise de 1929 e da Grande Depressão, período de consolidação política e social do novo regime. Ao decretar a marinha mercante portuguesa como sendo de interesse nacional, o Estado Novo concebeu e delineou um regime de serviço público para a exploração exclusiva das ligações com as colónias africanas. A partir deste pressuposto, veremos como é que se chegou à sua determinação e como é que este sistema se caracterizou. Identificaremos depois os mecanismos utilizados para garantir a ingerência do estado ditatorial nas estratégias das empresas portuguesas de navegação, assim como a resposta dada por estas empresas.
Os regressos da guerra: espaço público, mundo digital e (re)produções mnemónicas
Authors: Caiado André , Ferreira Verónica , Cardina Miguel
Published: December 2021

Durante um largo período, o efetivo impacto da guerra colonial na sociedade portuguesa foi acompanhado de um relativo silêncio institucional envolvendo a memória do conflito. À escassa abordagem pública do evento seguiu-se, nas duas últimas décadas, o crescimento de diferentes processos de memorialização do conflito, para os quais contribuiu decisivamente o trabalho de memória produzido por associações ou grupos mais ou menos formalizados de antigos combatentes. Este artigo analisa dois desses eixos memoriais: os monumentos evocativos da guerra e as representações mnemónicas do conflito no maior blogue português de antigos combatentes. Argumentaremos que apesar de estarem circunscritos às comunidades de recordação que os promovem e neles participam, influenciam e são influenciados pela memória pública dominante da guerra e contribuem para gerar momentos de sociabilidade e sentimentos de (auto)reconhecimento para esses grupos.
Blog de viagem, entre a encenação pessoal e o alinhamento comercial - um quadro conceitual
Authors: Winsky Nora , Dickow Julia
Published: December 2021

Devido às recentes mudanças na blogosfera, e nos blogs de viagens em particular, há uma necessidade de refletir sobre os blogs de viagens como mídia complexa. Neste artigo, os processos de mercantilização e profissionalização, bem como a situação específica dos blogs de viagem na interface dos mundos on e offline, são levados em conta para apresentar uma estrutura conceitual diferenciada e adaptável para a análise de blogs de viagem. Dentro dessa estrutura, os blogs estão situados entre a encenação pessoal e o alinhamento comercial. O artigo mostra como o uso de diferentes práticas de blogs (como compartilhar e recomendar experiências de viagem) permite aos blogueiros construir e usar diferentes web-identidades simultaneamente. Ao utilizar leituras próximas e amplas, é demonstrado como desempenhar o papel de conhecedor de uma cidade turística e amigo on-line (encenação pessoal) permite aos blogueiros estabelecer um blog de viagem lucrativo e ser eficaz com suas estratégias de marketing (alinhamento comercial). Um estudo de caso de blogs de viagem relativos a Barcelona serve como exemplo ilustrativo e confirma a adequação dessa abordagem conceitual.
Le baptistère de Lydie en Grèce du Nord
Authors: Seraïdari Katerina
Published: December 2021

Construit en 1974, le baptistère de Lydie commémore un événement fondateur de l’histoire du christianisme : c’est là, dans la rivière de Philippes, que Paul aurait baptisé Lydie, entre 49 et 50 de notre ère. L’article examine comment ce baptême emblématique (censé être le premier sur le continent européen) a d’abord été commémoré au dix-neuvième siècle par Lampakis, un érudit grec : celui-ci a transformé l’eau de Philippes en objet muséographique exposé dans un musée athénien. Avec l’érection d’une église, ce qui était jusque-là délocalisable est monumentalisé et ancré au sol ; grâce à la mobilité internationale que ce baptistère suscite, même le territoire est requalifié. Ce cas permet ainsi de mieux appréhender les interactions entre les quatre paramètres principaux du tourisme religieux : le site religieux, les personnes, les objets et les événements.
Impact of Psychological Contract on Employees' Performance
Authors: Sachdeva Geeta
Published: December 2021

The performance of employees defines the competitive advantage of the company in current ferocious competition, and it affects the long-standing growth of the company. If a company inspires its workforce merely by the means of financial contract, then the company will not be in the position to gain the effective and efficient performances from its employees. Because apart from this financial contract, psychological contract also upsets attitudes and performance of the employees at the workplace. The spirit of the firms is the employees, and the implementation of the psychological contract can effectually decrease the turnover rate of employees and consequently increase their efficiency at the workplace. In the current chapter, first of all an attempt has been made to elucidate the concept and development process of psychological contract. After that it is endeavored to highlight the positive impact of psychological contract on employees' performances such as job satisfaction, organizational commitment, job performance, organization citizenship behavior, and turnover intentions.
Digitalization of Human Resources
Authors: Baykal Elif
Published: December 2021

Recent decades brought about astonishing technologies that affected organizations in several ways. With the latest developments, organizations earned the capabilities to carry out their functions more efficiently and rapidly. Having several tasks affecting both interior and exterior customers, human resources departments also benefited from these technological developments. Owing to the digital revolution, e-HR emerged as a new way of practicing HRM activities with the latest web-based and computer-based tools and applications. These applications eased the work of HR professionals and served them the opportunity to focus on their core work, namely strategic human resources activities rather than procedural paperwork of the department. With a holistic and integrative approach, this digital transformation in HRM has been dispersed among all services in human resources including recruitment, career management, training and development, performance management, and compensation.
Implementation of an Intelligent Model Based on Machine Learning in the Application of Macro-Ergonomic Methods in a Human Resources Process Based on ISO 12207
Authors: Franco Edgar Cossio , Cazarez Jorge Alberto Delgado , Zezzatti Carlos Alberto Ochoa Ortiz
Published: December 2021

The objective of this chapter is to implement an intelligent model based on machine learning in the application of macro-ergonomic methods in human resources processes based on the ISO 12207 standard. To achieve the objective, a method of constructing a Java language algorithm is applied to select the best prospect for a given position. Machine learning is done through decision trees and algorithm j48. Among the findings, it is shown that the model is useful in identifying the best profiles for a given position, optimizing the time in the selection process and human resources as well as the reduction of work stress.
The Wasta Model
Authors: Sfeir Elizabeth Kassab
Published: December 2021

This article explores the concept of Wasta, an interpersonal influence. It is defined by Mohamed and Mohamed as involvement of a third-party person to attain a favour. This research examines the impact that Wasta has on human resources practices in Lebanon. A mixed methods approach, being questionnaires and interviews, was used in order to obtain data. Implications of Wasta in a new model are illustrated showing the effect on employees when recruited through knowing someone. It subsequently shows the influences on other HR practices of training and development, compensation, and career development. This paper is the first of its kind illustrating the impact of Wasta on employee engagement. It is a pillar for future research, giving added value to the minimal studies available on HR practices in Lebanon and the Middle East.
Unlocking Drivers for Employee Engagement Through Human Resource Analytics
Authors: Bakhru Kanupriya Misra , Sharma Alka
Published: December 2021

The authors have discussed in detail the meaning of employee engagement and its relevance for the organizations in the present scenario. The authors also highlighted the various factors that predict the employee engagement of the employees in the varied organizations. The authors have emphasized on the role that HR analytics can play to identify the reasons for low level of engagement among employees and suggesting ways to improve the same using predictive analytics. The authors have also advocated the benefits that organizations can reap by making use of HR analytics in measuring the engagement levels of the employees and improving the engagement levels of diverse workforce in the existing organizations. The authors have also proposed the future perspectives of the proposed study that help the organizations and officials from the top management to tap the benefits of analytics in the function of human resource management and to address the upcoming issues related to employee behavior.
Human Resource Information System Use, Satisfaction, and Success
Authors: Srivastava Sonalee , Dev Santosh , Bajaj Badri
Published: December 2021

With the advent of technology in the workplace, the applicability of the human resource information system (HRIS) within organizations has gained momentum widely. Indeed, employees' perceptions towards human resource information system has changed gradually. Human resource information system is influencing employees' work activities to such an extent that it has become imperative precedence for organizations' to maintain HRIS quality. Keeping this in the background, the study aims to examine the relationship of HRIS system quality, HRIS information quality, HRIS service quality, and HRIS perceived usefulness in determining HRIS system use and its users' satisfaction. Further, the study also aims to analyze the relationship of HRIS system use and HRIS users' satisfaction in determining HRIS success in Indian organizations. A sample of 116 HR staffs and managers working in IT-enabled service sector from National Capital Region (India) has been taken for step-wise regression analyses. The findings of the study revealed that HRIS service quality and perceived usefulness showed a significant positive relationship with HRIS system use. The results also revealed that HRIS system quality and perceived usefulness showed a significant positive relationship with users' satisfaction. Further, the findings also revealed that HRIS system use and HRIS users' satisfaction has a significant relationship with HRIS success.
Theory of Constraints and Human Resource Management Applications
Authors: Galli Brian J.
Published: December 2021

This purpose of this article is to assess constraints and suggest a theory that can improve Human Resource Management Systems (HRMS's). It investigates the relationship between Theory of Constraints (TOC) and operation management, which is based on the Critical Chain PMs book entitled The Goal. In 1984, the author, Goldratt, introduced an entire management philosophy about the TOC. The mental process and improvement theory tools discussed in his book mainly focus on manufacturing environments. However, the practice and examples in the book helped many organizations succeed, even in the private sectors. This study offers definitions of throughput, operating expense, and inventory measurements, and uses the principle of TOC to identify bottlenecks and constraints in every business process. By using these analyses, the study remodels the system to increase performance measurements of HRMS.
Transformation of Human Resources Management Solutions as a Strategic Tool for GIG Workers Contracting
Authors: Elayan Malek B.
Published: December 2021

Recently, organizations are becoming more intelligent, flexible, and efficient by using new digital technologies in human resources management (HRM). The HRM solutions are considered as an important source to support strategic decisions, create value within and across organizations for employees and management. Today, organizations are facing challenges for gig workers to retain the level of progression and development required for business continuity. Gigs are generally self-employed who are very hard to manage without having a solid e-HRMS that can fulfill their needs in addition to the permeate employee needs as well. The main objective of this chapter is to highlight digital transformation in HRM and dive into the e-HRM concept, development stages, types, and strategies. In addition, it shows how e-HRM contributes to increase the effectiveness of human resources. It will also discuss multiple dimensions about the gig work management (GWM) including the contracting methodologies, policies, and behaviors that the e-HRM need to consider for the gig workers.
eHR Cloud Transformation
Authors: Ziebell Robert-Christian , Albors-Garrigos Jose , Schultz Martin , Schoeneberg Klaus Peter , Perello-Marin M. Rosario
Published: December 2021

The article covers process models for HR IT projects and in particular for HR transformation projects. Based on the authors' experience, an applied process model for HR transformation projects in a cloud-based environment is derived. The article identifies findings applicable to the fields of organisation, business, and IT as well as decisions and critical success factors in the specific context of cloud-based HR solutions.
Electronic Media
Authors: Gupta Sakshi , Yadav Neha , Gaba Loveleen
Published: December 2021

Recruitment has changed over the years. Organisations have started searching for an easy and cost effective platform for personality mining. With the explosion of social networking sites, candidates are now able to choose where they could spend their time online. This has encouraged many recruiters to start using social networking as part of a new cost-conscious approach to personality mining. Social networking websites function like an online community of internet users. Popular online sites include LinkedIn, Twitter, and Facebook. They are growing at an exponential rate, with most of the sites being free to join and, importantly, giving organizations an effective means of attracting today's Generation Y workforce. The purpose of this article is to contribute to emerging theory about the role of social networking sites in the process of personality mining.
Green Human Resources and Sustainable Business Solutions
Authors: Lawal Ibrahim Olanrewaju , Olawoyin Femi Stephen
Published: December 2021

This chapter discusses green human resources (HR) and its impact on sustainable business solutions. It embraces work area research and writing audit way to discover the connection between green HR and sustainable business performance. This chapter examines the influence of human resources (HR) as a fundamental capacity in an organisation. The role of HR in the organisation has moved beyond focusing on realising organisational objective but into the integration of corporate strategy with environmental sustainability through environmentally friendly practice. The study explores instrumental theory, which focuses on both shareholder and stakeholders' interests of an organisation. Therefore, organisations need to align its operational objectives with environmental sustainability objectives through effective green HR practices to achieve sustainable business solutions.
Organizing Human Resources in Family Firms During Generational Succession
Authors: Melina Anna Maria , Cristofaro Concetta Lucia , Ventura Marzia , Reina Rocco
Published: December 2021

HRM in family firm (FF) research has moved from its narrow focus on selection and succession planning towards studying the broader antecedents, content and outcomes of HRM. Today, HRM is acknowledged as a crucial factor for attracting new talent, improving employee attitude and behavior, enhancing performance, and fostering the long-term competitive advantages. The aim of this study is to identify which tools and practices FFs adopt with HR during succession planning. For example, do they use the replacement table with the aim of providing the firm and its management with a map that allows them to make the most appropriate decisions to replace a person who is no longer available to fill a certain position? Or is it possible to identify other tools? Similar questions help the authors to investigate around the importance regarding people in firms during generational succession.
Friends or Foe?
Authors: Manna Rosalba , Palumbo Rocco , Pellegrini Massimiliano
Published: December 2021

Scholars have argued that business ethics is a crucial ingredient for the successful recipe of human resource management. However, little is known about the factors that trigger an organizational commitment towards the promotion of an ethical approach in crafting human resource management practices. This is especially true for family firms, whose ethical slant in devising human resource management practices has been under-researched. This chapter intends to push forward our knowledge in the field of business ethics investigating the role of familiness in determining ethically-rooted human resource management practices among small and medium-sized enterprises. More specifically, the authors investigated how awareness of business ethics issues and formalization of human resource management policies and practices affect the SMEs commitment to ethics. Family firms were found to be aware of the ethical challenges that characterize human resource management; however, no evidence was retrieved about the role of familiness in triggering an ethical commitment in managing human resources.
Human Resources Management in Social Entrepreneurship
Authors: Güler Burcu Kümbül
Published: December 2021

With the rise of social entrepreneurship, social enterprises have gained popularity as socially innovative organizations which try to balance their economic and social missions. In the competitive environment of social economy, good management and investment in human resources have become requirements of social enterprises for their survival. Among the management practices, human resources management acts as a tool for gaining competitive advantage and it builds mutual trust between the staff and the organization. Emphasizing the significance and challenges of human resources management, this chapter explains human resources main practices—recruitment, career management, training, and compensation and performance management—in social entrepreneurship.
How does Leadership Motivate the Innovative Behaviors of Software Developers?
Authors: Choi Youngkeun
Published: December 2021

This study examines the relationship between transformational leadership types and the motivation of software engineers. The author uses full range leadership as a major theory and investigates how transformational leadership types influences the innovative behaviors of software developers by using a mediator of affective organizational commitment. For this, this study surveys 352 software developers working in 35 companies in Korea and analyzes the data using AMOS 24. The results show that charisma, inspirational motivation, intellectual stimulation and individualized consideration increase their affective organizational commitment affecting innovative behaviors positively in turn.
Talent Management as a Part of Sustainable Human Resources Management
Authors: Janošková Mária , Ubrežiová Iveta , Čulková Katarína
Published: December 2021

The development of knowledge society and the conception of human capital stimulated creation of a different view to human resources. The key factors of company success are not just material and financial sources; greater attention is given to talents. Human resources present most important strategic assets of a company. Employees that can be marked as “talents” have the greatest importance. Organizations receive talents differently, which is caused by different environments and conditions. Implementation of talent management in practice is not yet distinct, since there is a lack of process idea. The chapter focuses on an overview of the opinions of experts on talent management in literature, identification and evaluation of career building of employees in an industrial company in Slovakia, with suggestions on the application of a talent management model.
Reflections of Human Resource Practices in Family Business
Authors: Müceldili Büşra , Tatar Berivan
Published: December 2021

Although much has been discussed about human resource management practices in large organizations, studies in the family firms' context are nascent in the literature. To better understand human resource management practices in the context of family firms, this study performed interviews on three experienced and successful family firm owners and human resource managers. The research findings reveal that family firms have professionalized, formalized, and employee-oriented perspective in their human resource practices. This study also showed that the new generations in the family are more aware of the importance of human resources and reflect this perspective to their human resource practices. Besides, employees' organizational justice perception is strengthened by considering equality between family and non-family employees in human resources practices. Implications of these results for practice and further research are discussed.
The Future of Workforce Planning
Authors: Ayandibu Ayansola Olatunji , Kaseeram Irrshad
Published: December 2021

This chapter examines the future of workforce planning in contemporary work organisations. Workforce planning is regarded as one of the essential human resource management (HRM) activities in recent times. The reason is that it gives indication on areas of needs and serves as the pillar for all HRM activities such as job analysis, recruitment and selection, training and development, remuneration/rewards, and promotion. A review of empirical literature reveals that workforce planning has a strong relationship with organisational performance as well as productivity. This chapter submits that HR metrics and workforce analytics can be used as a tool to improve organisational outcomes. To boost human activity, intelligence apps and analytics or cognitive analytics robotics could be adopted to improve HR's value to the business.
An Architecture for Bidirectional Learning Games
Authors: von Leipzig Tanja , Lutters Eric , Hummel Vera , Schutte Cornè
Published: December 2021

Dynamic personalization of learning trajectories that integrate different perspectives and variable scenarios is a viable way to improve the effectiveness and efficiency of training and education. Serious games offer a designated platform for this, by aggregating learner interactions, and using these to dynamically configure, adjust and tailor the game to individuals and contexts. An architecture is presented to support the creation of serious games for specific scenarios, in a faster, more effective and efficient manner. Following a research-by-design approach, the architecture is simultaneously developed and applied in case studies, with the experiences infused as enhancements for subsequent design iterations.
Structure and Peptidomes of Swine MHC Class I with Long Peptides Reveal the Cross-Species Characteristics of the Novel N-Terminal Extension Presentation Mode
Authors: Wei Xiaohui , Wang Song , Wang Suqiu , Xie Xiaoli , Zhang Nianzhi
Published: December 2021

Antigenic peptide presentation by the MHC is essential for activating T cells. The current view is that the peptide termini are tethered within the closed Ag-binding groove of MHC class I (MHC-I). Recently, the N-terminal extension mode of peptide presentation has been observed in human MHC-I (HLA-I). In this study, we found that the N terminus of the long peptide can extend beyond the groove of swine MHC-I (SLA-1*0401), confirming that this phenomenon can occur across species. Removal of the N-terminal extra (P-1) residue of the RW12 peptide significantly reduced the folding efficiency of the complex, but truncation of the second half of the peptide did not. Consistent with previous reports, the second (P1) residue of the peptide is twisted, and its side chain is inserted into the A pocket to form two hydrogen bonds with polymorphic E63 and conserved Y159. Mutations of E63 disrupt the binding of the peptide, indicating that E63 is necessary for this peptide-binding mode. Compared with W167, which exists in most MHC-Is, SLA-I–specific S167 ensures an open N-terminal groove of SLA-1*0401, enabling the P-1 residue to extend from the groove. In this MHC class II–like peptide-binding mode, the A pocket is restrictive to the P1 residue and is affected by the polymorphic residues. The peptidomes and refolding data indicated that the open N-terminal groove of SLA-1*0401 allows one to three residues to extend out of the Ag-binding groove. These cross-species comparisons can help us better understand the characteristics of this N-terminal extension presentation mode.
Preliminary results of a randomized crossover clinical trial comparing a new electromagnetic and vibrating device and alpha-blocker agents in patients affected by bladder outlet obstruction secondary to benign prostatic hyperplasia
Authors: Brardi Simone , Romano Giuseppe , Cevenini Gabriele
Published: December 2021

To the Editor, Benign Prostatic Hyperplasia (BPH) is one of the main causes of patients seeking urological counselling in Western countries. It has been estimated that nearly 70 percent of United States men between the ages of 60 and 69 years, and nearly 80 percent of men ≥ 70 years, have some degree of BPH [...].
Gravidanza e malattie autoimmuni
Authors: Gnerre Guest Editor: Paola
Published: December 2021

Gravidanza e patologie autoimmuniC. Politi, V. Donvito, A. Tincani

La contraccezione e la terapia estroprogestinica nelle donne con malattie autoimmuniM. Montesano, R. Picilli, G. Nova, M. Vignali

Gravidanza e monitoraggio fetale in pazienti con malattie reumatiche autoimmuniI. Cetin, R. Milazzo, L. Basili

Lupus eritematoso sistemico e gravidanzaM. Larosa, A. Doria

Artrite reumatoideV.L. Ramoni

Sindrome da anticorpi anti-fosfolipidi in gravidanza e puerperioM.C. Gerardi, C. Nalli, D. Lini, A. Tincani

Gravidanza e sclerosi sistemica (sclerodermia)A. Brucato, M. Nivuori, A. Mazzone

Anticorpi anti-Ro/SSA, sindrome di Sjögren, lupus neonatale e blocco cardiaco congenitoC. Picchi, E. Tombetti, A.L. Brucato

Patologie della tiroide in gravidanzaS. De Carolis, E. Barbagelata, I. Ambrosino, S. Tabacco

Gestione della gravidanza nelle donne con malattia di Behçet e vasculitiM. Gerosa, M. Cornalba, A. Sinelli, R. Cimaz, R. Caporali

Sclerosi multiplaA. Protti, E.L. Susani, L. Saraceno, M.R. Marazzi, E.C. Agostoni

Malattie autoinfiammatorie ereditarie e gravidanzaL. Obici

Pericardite in gravidanzaE. Barbagelata, I. Ambrosino, E. Bernero, A. Brucato

Fisiologia del rene in gravidanzaT. Ciarambino, F. Saladini, D. Manfellotto

Terapia con farmaci antireumatici in corso di gravidanza e allattamentoM.C. Gerardi, D. Lini, L. Andreoli

Il ruolo delle analisi di laboratorio nella gravidanza delle donne con malattie immunoreumatologicheF. Bartoli, C.B. Chighizola

Gravidanza e malattie autoimmuni: il bambinoM. Romano, R. Cimaz

Fecondazione medicalmente assistita nelle malattie autoimmuni sistemicheS. Truglia, S. Mancuso, F. Conti

Il punto di vista delle pazienti: la ricerca che accarezzaI. Galetti, S. Ostuzzi
Microbiological profiles of tracheostomy patients: a single-center experience
Authors: Alrabiah Abdulaziz , Alhussinan Khaled , Alyousef Mohammed , Alsayed Ahmed , Aljasser Abdullah , Alduraywish Shatha , Alammar Ahmed
Published: December 2021

Background: This study compared the prevalence of common microorganisms in obstructed and non-obstructed cases across the four quarters on the first post-tracheostomy year.Methods: A retrospective chart review of the microbiological profiles of all adult patients who underwent a tracheostomy was conducted between June 2015 and September 2019 at our hospital. Based on the tracheostomy indications, patients were allocated to obstructed or non-obstructed group. Any patient with at least one positive sample was followed up quarterly for a year. The first culture result obtained was recorded at least one month following the last antibiotic dose in each quarter.Results: Out of the 65 tracheal aspirate results obtained from 58 patients (mean age, 57.5±16.48 years), the most common procedure and indications were surgical tracheostomy (72.4%) and non-obstructed causes (74.1%), respectively. Moreover, 47.7% of the culture results indicated Pseudomonas aeruginosa, which showed significantly different proportions across the quarters (p=0.006). Among obstructed patients, P. aeruginosa was the most common (35%), followed by methicillin-resistant Staphylococcus aureus (MRSA; 23.5%).Conclusions: The most common post-tracheostomy microorganism was P. aeruginosa. MRSA showed a strong association with tracheostomy for obstructive indications.
[A brief history about the ALPI project]
Authors: Pedrini Paolo , Spina Fernando
Published: December 2021

[Conceived by the National Ringing Centre ISPRA and MUSE (Trento, formerly MTSN), the Alps Project was launched in 1997 in order to understand the post-breeding migration strategies of birds across the Italian Alps. The project is realized thanks to the support offered by MUSE and several institutions at a local scale, not to mention the collaboration of over one hundred ringers. In more than twenty years, 40 stations located in sites of passage (alpine and pre-alpine passes) and stop-over (valley floors and slopes) have taken part in the project, leading to a dataset of 666,471 ringed individuals and 191 species (as to 2017). After a first exploratory phase (1997-2002), in which the migration was investigated in its many aspects of specific composition and spatial-temporal variation, the project has been restricted to a smaller number of stations since 2007. Those stations are characterized by working in a standardized and continuous way during the whole period (August-November) or during the migration period of the intra-Palearctic species (end of September-October). In this paper we describe the aims, protocols and organizational aspects of the project, with a special focus on monitoring trends and changes in the long-term phenology. This ongoing project (2021) is part of the ISPRA national ringing plan to monitor bird migration across the country].

 

[Article in Italian]
Hopf–Galois structures on ambiskew polynomial rings
Authors: Bichon Julien , García Iglesias Agustín
Published: December 2021

We provide necessary and sufficient conditions to extend the Hopf–Galois algebra structure on an algebra

R

to a generalized ambiskew ring based on

R

, in a way such that the added variables for the extension are skew-primitive in an appropriate sense. We show that the associated Hopf algebra is again a generalized ambiskew ring, based on a suitable Hopf algebra

\underline{H}(R)

. Several examples are examined, including the Hopf–Galois objects over

U_q(\mathfrak{sl}_2)

.
Detecting a botnet in a network
Authors: Bet Gianmarco , Bogerd Kay , Castro Rui M. , van der Hofstad Remco
Published: December 2021

We formalize the problem of detecting the presence of a botnet in a network as a hypothesis testing problem where we observe a single instance of a graph. The null hypothesis, corresponding to the absence of a botnet, is modeled as a random geometric graph where every vertex is assigned a location on a

d

-dimensional torus and two vertices are connected when their distance is smaller than a certain threshold. The alternative hypothesis is similar, except that there is a small number of vertices, called the botnet, that ignore this geometric structure and simply connect randomly to every other vertex with a prescribed probability.

We present two tests that are able to detect the presence of such a botnet. The first test is based on the idea that botnet vertices tend to form large isolated stars that are not present under the null hypothesis. The second test uses the average graph distance, which becomes significantly shorter under the alternative hypothesis. We show that both these tests are asymptotically optimal. However, numerical simulations show that the isolated star test performs significantly better than the average distance test on networks of moderate size. Finally, we construct a robust scheme based on the isolated star test that is also able to identify the vertices in the botnet.
Structural adaptation in the density model
Authors: Lepski Oleg V. , Rebelles Gilles
Published: December 2021

This paper deals with nonparametric density estimation on

\mathbb{R}^2

from i.i.d. observations. It is assumed that after
unknown
rotation of the coordinate system the coordinates of the observations are independent random variables whose densities belong to a Hölder class with
unknown
parameters. The minimax and adaptive minimax theories for this structural statistical model are developed.
Prawo spadkowe vs. sprawiedliwa sukcesja obiektów dziedzictwa kulturowego?
Authors: Dajczak Wojciech
Published: December 2021

The law of inheritance vs. the just succession of the cultural property? Heirless property in European countries is typically inherited by the state. However, the routine application of this rule to assets belonging to victims of the German genocide during WWII continues to raise doubts. The recognition of a moral responsibility towards Holocaust victims in the Terezin Declaration legitimates the international debate on tensions between inheritance law and justice. The lack of a universal model for the succession of heirless Jewish cultural property acknowledged by this Declaration provokes different recommendations. One of the possibilities is the collective cultural restitution notion as a countermeasure to the crime of cultural genocide. This theory links the reinterpretation of the concept of genocide presented by Lemkin in 1944 with the restitution actions of Jewish succession organizations in 1940s and 50s. The theory mentioned is challenged in the article. The analysis is based on historical arguments, i.e. Lemkin’s focus on criminal liability and the specific nature of legal grounds for Jewish succession organizations after WWII. The history of inheritance law provides arguments to recommend another innovative way of dealing with the heirless property forming part of genocide victims’ inheritance. It is reasonable to distinguish between solutions pro futuro and those possible today. The paper concludes with a recommendation to supplement the Genocide Convention with specific rules about the heirless property of genocide victims. The state responsible for committing genocide should be eliminated from the inheritance of bona vacantia in favour of local successor organizations appointed by an international penal tribunal. Cultural property should be excluded from universal succession in the case of genocide and regarded as a legal person that continues victims’ remembrance. Currently, this model can inspire Polish policy regarding heirless Jewish cultural property. It should be focused on three goals: for objects to remain in Poland, the creation of a new complex database of objects accessible online and, if possible, the exhibition of objects alongside information about their last respective owners who died heirless.
Architectural development of recreation facilities in Ukraine and internationally
Authors: Proskuryakov Victor , Voronkova Ivanna
Published: December 2021

The paper presents the definition of key terms distinguished and used in the field of vacationing, leisure, and recreation. It explains their similarities and differences. The classification has been developed for holiday centers according to their intended use, forms of activity, and types of services. Key criteria for their classification are provided. It analyzes the experience of designing contemporary recreation centers in Ukraine and all over the world, and identifies key trends in the development of their architecture and infrastructure in general.
The Evolution of Rural Tourism in South Africa: An Historical Lens
Authors: Rogerson Christian , Rogerson Jayne
Published: December 2021

This paper utilises archival research to provide a glimpse into the historical development of rural tourism in South Africa. It points to the minimal focus on historical studies in international scholarship on rural tourism. The analysis demonstrates rural tourism in South Africa is not a new phenomenon with a recorded history going back as far as the late 19th century. Different rural spaces are shown to be associated with different niche products of rural South Africa. The earliest forms of rural tourism were promoted to both groups of domestic and international visitors. Arguably, the evolutionary pathway of rural tourism in South Africa is different to that which has been documented in the Global North. Overall, the paper represents a contribution to the limited international literature on rural tourism in its historical aspects as well as to evolving rural tourism scholarship in South Africa. In addition, it offers an historical window on issues of tourism and change in the Global South.
The Importance of Service Attributes between Low-cost and Full-service Carrier Customers: A case of Airline Type Hybridisation
Authors: Funyane Nkululeko
Published: December 2021

This study sought to assess if the importance attached by customers to the airline service attributes differed across low-cost and full-service airline models. A Mann-Whitney U Test was used to assess the difference between the two models. However, before subjecting the data to differential tests, an exploratory factor analysis (maximum likelihood) was performed on the fifty-five items of service attributes, reducing them into forty-two items retained into ten latent factors (airline service attributes). The results of the revealed a significant difference in the importance attached to staff competence, courtesy and responsiveness only. Such findings suggest that the positioning of airlines into binary (FSC - LCC) models could be a waste of effort and resources since airlines seem to be converging.
IR-MF-SVMe: Image Retrieval using Multiple Features Extraction with Support Vector Machine ensemble
Authors: Venkataravana Nayak K., , Arunalatha J. S. , Venugopal K. R.
Published: December 2021

Image representation is a widespread strategy of image retrieval based on appearance, shape information. The traditional feature representation methods ignore hidden information that exists in the dataset samples; it reduces the discriminative performance of the classifier and excludes various geometric and photometric variations consideration in obtaining the features; these degrade retrieval performance. Hence, proposed multiple features fusion and Support Vector Machines Ensemble (IR-MF-SVMe); an Image Retrieval framework to enhance the performance of the retrieval process. The Color Histogram (CH), Color Auto-Correlogram (CAC), Color Moments (CM), Gabor Wavelet (GW), and Wavelet Moments (WM) descriptors are used to extract multiple features that separate the element vectors of images in representation. The multi-class classifier is constructed with the aggregation of binary Support Vector Machines, which decrease the count of false positives within the interrelated semantic classes. The proposed framework is validated on the WANG dataset and results in the accuracy of 84% for the individual features and 86% for the fused features related to the state-of-the-arts.
PERCORRENDO CAMINHOS: ITINERÁRIO TERAPÊUTICO DE MULHERES USUÁRIAS DE ÁLCOOL E/OU OUTRAS DROGAS DURANTE CICLO GRAVÍDICO-PUERPERAL
Authors:   Autarquia Municipal de Saúde de Apucarana, PR, Brasil., Silva Isabelle Caroline Vitor da , Rodrigues Ana Vanessa Deffaccio ,   Autarquia Municipal de Saúde de Apucarana, PR, Brasil., Neves Maria Aparecida Moreira das ,   Autarquia Municipal de Saúde de Apucarana, PR, Brasil.
Published: December 2021

Pregnancy, childbirth and postpartum care is provided in accordance with gestational risk factors, such as use of alcohol and/or other drugs by pregnant women. The objective of this study was to trace the therapeutic itinerary of pregnant women who use alcohol and/or other drugs in the health network of a city in the Mid-North of the state of Paraná. This is a qualitative, exploratory study conducted through individual interviews. Firstly, the therapeutic itineraries were built, then the speeches were analyzed in accordance with Bardin and discussed with the aid of current literature. Regarding the therapeutic itinerary, the interviewees accessed primary care, high-risk prenatal care, and hospital services. The results identified two categories: Considerations on the use of alcohol and drugs during pregnancy, and Strengths and weaknesses of the healthcare network’s points of attention. From the statements, probable biological and social implications of using psychoactive substances during pregnancy emerged, such as complications during gestation, fetal alterations, and loss of legal rights over children. As for the points of attention, the importance of multidisciplinarity and the role of nursing were highlighted. On the other hand, the network’s disarticulation and professionals’ inability, represented by inappropriate comments and lack of guidance, appear as weakness. It was concluded that it is necessary to provide comprehensive follow-up to pregnant and postpartum women who use alcohol and drugs, with the articulation of the healthcare network and professionals free from judgment to provide a care that meets their biopsychosocial demands.
ACCOUNTING ASPECTS OF CRYPTOCURRENCY OPERATIONS MANAGEMENT
Authors:   Analysis and Insurance Kharkiv State University of Food Technology and Trade, Makurin Andrii
Published: December 2021

The information technology development results in the origin of new types of cryptocurrency. Main advantages of the cryptocurrency use are decentralization and freedom of transactions. Cryptocurrency acts worldwide as the inexpensive technological means of payment as well as special form of investment. Nowadays, there is no shared idea as for the interpretation of the “cryptocurrency” concept. On the one hand, it is considered as the “virtual currency” and called both a special payment network and a new type of monetary means. On the other hand, it is called a “digital asset”, which can be exchanged for other assets. Cryptocurrency is characterized by a free market rate formed on the demand-supply basis.