showing 36 of ~574560 from 574555 documents
Numerical studies to detect chaotic motion in the full planar averaged three-body problem
2023
AbstractIn this paper, the author deals with a well-known problem of Celestial Mechanics, namely the three-body problem. A numerical analysis has been done in order to prove existence of chaotic motions of the full-averaged problem in particular configurations. Full because all the three bodies have non-negligible masses and averaged because the Hamiltonian describing the system has been averaged with respect to a fast angle. A reduction of degrees of freedom and of the phase-space is performed in order to apply the notion of covering relations and symbolic dynamics.
La economía social responsable y los Objetivos de Desarrollo Sostenible frente a la crisis post-COVID-19: la voz de las personas expertas
2023
El objetivo del trabajo es conocer las aportaciones que pueden realizar la economía social y de la responsabilidad social corporativa en la búsqueda de soluciones a la crisis sanitaria y económica actual, con el fin de evitar sus efectos más traumáticos. Para ello, se analizan las variaciones que pueden producirse en tres escenarios: en las organizaciones sociales y responsables, en los cambios de valores en concordancia con los Objetivos de Desarrollo Sostenible (ODS), y en las transformaciones hacia nuevos modelos económicos y de empresa. De este modo, se revisan los elementos favorables existentes, como el papel de las empresas contra los efectos de la pandemia, el importante consenso in…
Wearable Multisensor Ring-Shaped Probe for Assessing Stress and Blood Oxygenation: Design and Preliminary Measurements
2023
The increasing interest in innovative solutions for health and physiological monitoring has recently fostered the development of smaller biomedical devices. These devices are capable of recording an increasingly large number of biosignals simultaneously, while maximizing the user’s comfort. In this study, we have designed and realized a novel wearable multisensor ring-shaped probe that enables synchronous, real-time acquisition of photoplethysmographic (PPG) and galvanic skin response (GSR) signals. The device integrates both the PPG and GSR sensors onto a single probe that can be easily placed on the finger, thereby minimizing the device footprint and overall size. The system enables the e…
Beyond emotional intelligence: The new construct of meta-emotional intelligence
2023
Meta-emotional intelligence is a recently developed multidimensional construct that, starting from the original ability model of emotional intelligence, focuses on the cognitive aspects of emotional abilities and on the metacognitive and meta-emotional processes that influence our emotional life. Thus, meta-emotional intelligence is the combination of emotional abilities and meta-emotional dimensions, such as the beliefs about emotions, the self-concept about one's emotional abilities, and the self-evaluation of performance. This article aims to illustrate the theoretical and methodological background of this construct and to describe the IE-ACCME test, an original multi-method tool that ha…
Taylorism on steroids or enabling autonomy? A systematic review of algorithmic management
2023
AbstractThe use of algorithmic management systems is rapidly changing organizational models and practices, as millions of workers in multiple sectors worldwide are managed by computer software. Despite receiving increasing academic interest, little summarizing literature exist on the ways algorithmic systems are used in management. This article aims to fill this gap by systematically reviewing and qualitatively analyzing 172 articles on the topic. Our research contributes to the existent algorithmic management literature in three ways. First, we provide a descriptive overview of algorithmic management as a field of research. Second, we identify and synthesize the discussion on the key conce…
Preceding Host History of Conjugative Resistance Plasmids Affects Intra- and Interspecific Transfer Potential from Biofilm
2023
Conjugative plasmids can confer antimicrobial resistance (AMR) to their host bacterium. The plasmids disperse even between distantly related host species, rescuing the host from otherwise detrimental effects of antibiotics. Little is known about the role of these plasmids in the spread of AMR during antibiotic treatment. One unstudied question is whether the past evolutionary history of a plasmid in a particular species creates host specificity in its rescue potential or if interspecific coevolution can improve interspecific rescues. To study this, we coevolved the plasmid RP4 under three different host settings; solely Escherichia coli or Klebsiella pneumoniae, or alternating between both …
Integration of 3D modelling with photogrammetry applied on historical images for cultural heritage
2023
The recovery of past architecture through 3D modelling is an important challenge today to the preservation of heritage. Decisive support for the interpretation of architecture can certainly come from historical images and old photographs that fix a portion of space at a specific time, keeping it unchanged over the years. This acquisition is decisive for studying architectures of the past that can be reinterpreted and analysed. Photos, in fact, capture the advance of time and the life of a building at a precise historical moment, becoming essential documents for the study and knowledge of heritage. An additional advantage is when these old images can be processed through Structure for Motion…
A Guide to Perform 3D Histology of Biological Tissues with Fluorescence Microscopy
2023
The analysis of histological alterations in all types of tissue is of primary importance in pathology for highly accurate and robust diagnosis. Recent advances in tissue clearing and fluorescence microscopy made the study of the anatomy of biological tissue possible in three dimensions. The combination of these techniques with classical hematoxylin and eosin (H&E) staining has led to the birth of three-dimensional (3D) histology. Here, we present an overview of the state-of-the-art methods, highlighting the optimal combinations of different clearing methods and advanced fluorescence microscopy techniques for the investigation of all types of biological tissues. We employed fluorescence …
Intermediate Isolation System with Nonlinear Lower Structure and Isolation System
2023
This paper reports a study on the Intermediate Isolation System (IIS) applied to existing buildings. This kind of application is particularly suitable when a vertical addition is planned for buildings in seismic zones; in such a case, an isolation system can be placed at the base of the extension to prevent the increase, or, better, to reduce the seismic demand on the existing structure. In previous works, parametric response spectrum analyses have been carried out on lumped mass models by varying the period of the isolation system. As a result, a sort of IIS design spectrum has been derived and used for selecting design solutions for the vertical extension that minimize the overall seismic…
Chemical-physical parameters, major, minor and trace elements compositions of big karst springs of Greece
2023
This database consists of samples of karst springs collected in Greece and selected on the base of their water flow (> 50 L s-1), over the period from May 2016 to October 2022
NAD+ repletion with niacin counteracts cancer cachexia
2023
AbstractCachexia is a debilitating wasting syndrome and highly prevalent comorbidity in cancer patients. It manifests especially with energy and mitochondrial metabolism aberrations that promote tissue wasting. We recently identified nicotinamide adenine dinucleotide (NAD+) loss to associate with muscle mitochondrial dysfunction in cancer hosts. In this study we confirm that depletion of NAD+ and downregulation of Nrk2, an NAD+ biosynthetic enzyme, are common features of severe cachexia in different mouse models. Testing NAD+ repletion therapy in cachectic mice reveals that NAD+ precursor, vitamin B3 niacin, efficiently corrects tissue NAD+ levels, improves mitochondrial metabolism and amel…
Protection of Patient Data in Digital Oral and General Health Care: A Scoping Review with Respect to the Current Regulations
2023
The use of digital health technologies, including telemedicine and teledentistry, has become a necessity in healthcare due to the SARS-CoV-19 pandemic. These technologies allow for the reduction of the workload of healthcare providers and the improvement of patient outcomes in cases of remote monitoring, diagnosis, and communication. While there are no doubtful benefits, there are some counterparts, such as concerns about clinical risks, data security, and privacy protection. This paper aims to review the regulations regarding the use of digital health apps and software in healthcare. This scoping review followed the PRISMA-ScR guidelines and the five-step framework of Arksey and O’Malley. …
Fluorescent Boron Oxide Nanodisks as Biocompatible Multi-messenger Sensors for Ultrasensitive Ni$^{2+}$ Detection
2023
Boron-based nanocomposites are very promising for a wide range of technological applications, spanning from microelectronics to nanomedicine. A large variety of B-based nanomaterials has been already observed, such as borospherene, B nanotubes and nanoparticles, and boron nitride nanoparticles. However, their fabrication usually involves toxic precursors or leads to very low yields or small boron atom concentration. In this work, we report the synthesis of nanometric B$_{2}$O$_{3}$ nanodisks, a family of nanomaterials with a quasi-2D morphology capable of intense fluorescence in the visible range. Such as boron-based nanomaterial, which we synthesized by pulsed laser ablation of a boron tar…
Checklist of the Mammal Collection Preserved at the University of Palermo under the Framework of the National Biodiversity Future Center
2023
The latest reorganization of the Vertebrate collections preserved at the “Pietro Doderlein” Museum of Zoology of the University of Palermo (Italy) has made it possible to draw up a check-list of the Mammal taxa present in the stuffed (M), fluid-preserved (ML) and anatomical (AN) collections. The intervention was planned under the National Biodiversity Future Center (NBFC) agenda, focused on the enhancement of Italian natural history museums. The growing interest in museum collections strongly demands databases available to the academic and policy world. In this paper, we record 679 specimens belonging to 157 specific taxa arranged in 58 families and 16 orders. Most of the species (75.1%) co…
ONLINE SOCIAL COMPARISON ITS ROLE IN PREDICTING INDIVIDUALS’ WELL-BEING
2023
Social comparison is the practice through which people compare their own opinions, abilities, behaviours, and emotions with those of others as an external guide and a source for self-evaluation. Social comparison has been put forward as a core feature of interpersonal relationships both in the offline context and in virtual interactions through social media. A growing number of studies has highlighted that online social comparison through social media can influence individuals’ everyday life. In this thesis, I will examine the role of online social comparison in influencing individuals’ well-being in three research designs with different outcomes. In the first empirical study, a cross-lagge…
The Relationship between Knowing Sign Language and Quality of Life among Italian People Who Are Deaf: A Cross-Sectional Study
2023
Deafness is a medical condition with important relational implications. This condition could affect well-being and self-esteem and cause social anxiety. Sign language is not only a simple mimic but can be considered as a different kind of communication that could be protective for those who have learned it. However, some people do not use sign language because they think it can be marginalizing. The present study aimed to compare the quality of life (QoL) between people who learned Italian sign language as their first language with those who had never learned it or learned it later. This cross-sectional study involved 182 deaf Italian adults (70.3% females) who were recruited from Ente Nazi…
High-Flow Nasal Therapy in Acute and Chronic Respiratory Failure: Past, Present, and Future
2023
High-flow nasal therapy (HFNT) was introduced into clinical practice in the early 2000s as a form of noninvasive respiratory support (NIRS). During the last 20 years, a growing body of evidence has shown the value of this intervention in the management of acute and chronic respiratory failure.
Knowledge about Palliative Care and Attitudes toward Care of the Dying among Primary Care Nurses in Spain
2023
Objective: To analyze the knowledge in palliative care and the attitudes toward caring for the dying of nurses who carry out their professional activity in primary care in Spain. Design: A cross-sectional descriptive observational study was carried out among Spanish primary care centers. Participants: A total of 244 nurses who had completed their primary care work and agreed to participate in this study were included. Main measurements: The level of knowledge in palliative care was analyzed using the PCQN-SV scale, and attitudes toward care of the dying were measured with the FATCOD-S scale, both of which are instruments that are validated in Spain. Results: Regarding the level of knowledge…
A comprehensive analysis of the genetic diversity and environmental adaptability in worldwide Merino and Merino-derived sheep breeds
2023
Abstract Background To enhance and extend the knowledge about the global historical and phylogenetic relationships between Merino and Merino-derived breeds, 19 populations were genotyped with the OvineSNP50 BeadChip specifically for this study, while an additional 23 populations from the publicly available genotypes were retrieved. Three complementary statistical tests, Rsb (extended haplotype homozygosity between-populations), XP-EHH (cross-population extended haplotype homozygosity), and runs of homozygosity (ROH) islands were applied to identify genomic variants with potential impact on the adaptability of Merino genetic type in two contrasting climate zones. Results The results indicate…
Career experts' conceptions of systems development in lifelong guidance
2023
AbstractThis article reports the findings from a phenomenographic study of career experts’ conceptions of systems development in lifelong guidance settings. The results show that conceptions of systems development in lifelong guidance varied from minimal, aspirational, strategic to systemic. By exploring the logical relationship between qualitatively different conceptions, it provides policymakers and other stakeholders with a way of holistically viewing the varying levels of lifelong guidance systems development. The matrix presented in this article may serve as a catalyst for reflection on crucial elements, such as legislation, leadership and cooperation, that have the potential to improv…
“Il disegno è l’arte di ben rappresentare”. Architettura, disegno e rappresentazione
2023
Come l’autore del volume Lillo Barberi sottolinea nell’Introduzione, l’intento dello studio monografico risiede nel «valorizzare al meglio le prerogative della rappresentazione architettonica in assonometria» proponendo «un’impostazione esecutiva che non sconvolge le modalità proiettive, ma che agevola le operazioni grafiche risolutive del disegno assonometrico e per questo viene denominata diretta». Anche in questo caso, si potrebbe affermare che, mediante il tema della rappresentazione dell’architettura, si affronti e si proponga un fare gnoseologico fondato sull’aspetto filologico dell’anagignoskein, ovvero la “conoscenza del conosciuto”, riferendoci all’espressione formulata da August B…
Multiple Theories of Change for innovation governance
2023
The Theory of Change approach aims to clarify the underlying logic of an intervention by first identifying the problem addressed and the desired outcome, and then backwards mapping the actions taken and the expected results and outcomes. In so doing, it aims to simplify the expression of intermediate goals and indicators and provide a common reference for the participants and stakeholders of the intervention itself. As such, it is similar to corporate ‘mission statements’ in that it aims to provide a single, unifying description of the what, why and how of an intervention. By framing the approach in terms of the ‘change’ required as a means of addressing a problem, Theory of Change is essen…
Properties of blended mortars produced with recycled by-products from different waste streams
2023
The construction industry encounters significant challenges in effectively managing solid waste produced during the extraction and production of building materials. In different countries, slurry waste generated from granite and marble processing industries, such as glass industry waste, constitutes a considerable portion of the total solid waste. Its undesirable disposal is causing unprecedented environmental damage. Using these non-biodegradable wastes to produce building materials would reduce the environmental burden and contribute to sustainable construction. This study, in detail, investigates the feasibility of utilizing Granite Powder (GP), Ground Granite Powder (GGP), and Ground Gl…
Association Between Pollution and Frailty in Older People: A Cross-Sectional Analysis of the UK Biobank
2023
Objectives: Frailty is a relevant issue in older people, being associated with several negative outcomes. Increasing literature is reporting that pollution (particularly air pollution) can increase the risk of frailty, but the research is still limited. We aimed to investigate the potential association of pollution (air, noise) with frailty and prefrailty among participants 60 years and older of the UK Biobank study. Design: Cross-sectional. Settings and participants: Older participants (age ≥ 60 years) participating to the UK Biobank. Methods: Frailty and prefrailty presence were ascertained using a model including 5 indicators (weakness, slowness, weight loss, low physical activity, and e…
Effect of hydrothermal time on the forming specific morphology of YPO4:Eu3+ nanoparticles for dedicated luminescent applications as optical markers
2023
A way to control the desired shape and microstructure of YPO4:Eu3+ nanoparticles through the precipitation method followed by a hydrothermal treatment is reported. This method is useful for achieving very high control over the YPO4:Eu3+ formation process with the selection of appropriate synthesis parameters. In detail, the autoclave processing time allows control of the shape and size of nano-needle-shaped particles independently in both directions, as confirmed by X-ray powder diffraction, FT-IR Spectroscopy and Electron Transmission Microscopy. In order to analyse the effect of the nanoparticles’ surroundings on the excitation and relaxation processes of luminescent ions, Eu3+ ion was us…
The Role of Social Media in the Creation of Young People’s Consumer Identities
2023
This article explores how young people construct and express their consumer identities via their consumption styles on social media. The importance of commercial content on social media, such as the postings of social media influencers and advertisers, has been increasing during the past years. Framed by theories on social identity, social comparison and consumer socialization, we analysed focus group discussions with 15 to 19-year-old teenagers in Finland ( N = 35). The results reveal that the participants had a clear understanding of their consumer identities: what kind of consumers they were and what they did not want to be. The consumption styles: luxury brand-oriented, trendy second-h…
Towards sustainable servicescape : tourists’ perspectives of accommodation service attributes
2023
The study uses content analysis to identify the sustainable attributes in 678 accommodation reviews from Finnish and Russian tourists published on the Tripadvisor website and examines the sustainability perceptions of these tourist groups. The servicescape framework was applied to the structuring of the attributes indicating sustain-ability in accommodation services. The sustainable attributes highlighted in the reviews were more frequently in the physical rather than in the social servicescape factor. The tourists also reported environmental sustainability attributes more often than those related to social, cultural and economic sustainability. Overall, the sustainable attributes were perc…
Degraded Gerber Saddles in RC Bridges
2023
Sudden failure of reinforced concrete (RC) or prestressed concrete (PC) Gerber saddles of bridges and viaducts has occurred all around in the word in the last few years due to corrosion of steel bars. The danger of sudden and brittle failure is often due to general and pitting corrosion of steel bars, concrete crushing, and loss of bond in steel bars. In this paper, the flexural response of reinforced concrete Gerber supports under their self-weight with or without service loads was investigated through determination of the load-deflection response of beams, with the focus on the consequences of pitting corrosion and loss of bond in steel bars. A simplified strut-and-tie model was developed…
La prescrizione nel rapporto di lavoro prima e dopo la riforma Fornero
2023
Dopo aver ricostruito la giurisprudenza in materia di prescrizione dei crediti da lavoro, a partire dalle più risalenti pronunce della Corte Costituzionale, il contributo fornisce il commento di una pronuncia del Tribunale di Taranto del 5 ottobre 2022, che ha applicato anche ai diritti soggetti a prescrizione decennale derivanti dalla prestazione lavorativa il principio di imprescrittibilità in costanza di rapporto di lavoro, recentemente reintrodotto dalla giurisprudenza della Suprema Corte per i diritti retributivi.
Virtual reality acceptance and commitment therapy intervention for social and public speaking anxiety : A randomized controlled trial
2023
Virtual reality (VR) offers new and flexible ways to provide psychological interventions. The aim of this study was to develop and investigate the effectiveness of a VR intervention based on acceptance and commitment therapy (ACT) for social and public speaking anxiety. ACT is a process-based approach that aims to (a) increase individuals’ abilities to handle difficult emotional and cognitive experiences and (b) develop the motivation required for change to occur. In this study, a sample of university students with social interaction or communication anxiety (N = 76; age M = 24.95, SD = 6.50, 69.7% females) was blindly randomized into a total of 2 h of VR ACT training (VRACT; n = 37) or a w…
Micrometer-size crystalline monolayer MoS2 domains obtained by sulfurization of molybdenum oxide ultrathin films
2023
In this work, the formation of micrometer-size crystalline monolayer (1L) MoS2 flakes with triangular shape and a central multilayer core is obtained by the sulfurization at 800 °C of pre-deposited ultrathin MoOx films (1.2–1.8 nm) on c-sapphire substrates. The thickness uniformity, crystalline quality, doping and strain distribution in the MoS2 flakes as a function of the initial MoOx thickness was evaluated by micro-Raman (μR) mapping. The excellent crystalline quality of the triangular 1L-MoS2 flakes was confirmed by micro-photoluminescence (μPL) maps, showing a very intense peak at ∼1.85 eV, that decreases in the central part, as expected for multilayers MoS2. A biaxial strain of ∼0.38–…
A new approach to portfolio selection based on forecasting
2023
In this paper we analyze the portfolio selection problem from a novel perspective based on the analysis and prediction of the time series corresponding to the portfolio’s value. Namely, we define the value of a particular portfolio at the time of its acquisition. Using the time series of historical prices of the different financial assets, we calculate backward the value that said portfolio would have had in past time periods. A damped trend model is then used to analyze this time series and to predict the future values of the portfolio, providing estimates of the mean and variance for different forecasting horizons. These measures are used to formulate the portfolio selection problem, whic…
Recursive Selective Harmonic Elimination for Multilevel Inverters: Mathematical Formulation and Experimental Validation
2023
A recursive method that eliminates +1 harmonics and their respective multiples from the output voltage of a cascaded H-bridge multilevel inverters with = 2 dc sources ( = 1, 2, 3,...) is proposed. It solves 2×2 linear systems with not singular matrices and always gives an exact solution with very low computational effort. Simulated results in three-phase five, nine, seventeen and thirty three level CHB inverters, and experimental results in five-level inverter demonstrate the validity of the method.
Marta Cimino e il Comitato dei lenzuoli. Antimafia, cordoglio e mobilitazione nell'Italia degli anni '90
2023
In 1992, the massacres in which judges Giovanni Falcone, Francesca Morvillo and Paolo Borsellino lost their lives, along with the women and men who made up their escorts, caused a shock throughout the country. Also for this reason, 1992 is considered a watershed year, a crucial date for the end of the “First Republic”. This essay reconstructs the history of an entirely new attempt at mobilisation, the Committee of the Sheets, which was born spontaneously immediately after the Capaci massacre on the initiative of Marta Cimino, a former militant of the New Left, the daughter of two militants of the Italian Communist Party. For its short life, the Committee was one of the best known expression…
Hybrid nanostructures based on gold nanoparticles and functional coordination polymers: Chemistry, physics and applications in biomedicine, catalysis…
2023
During the last decade, the scientific community has become interested in hybrid nanomaterials, especially the ones that combine gold nanoparticles with a second functional component. In this context, coordination polymers are materials that possess potential advantages over conventional inorganic nanomaterials and organic compounds such as chemical versatility, easy processability, high specific area, low toxicity, biodegradability and electronic and magnetic functionalities to name a few. In this manner, the wise integration of Au nanoparticles with coordination polymers in different types of nanostructures has allowed extending the scope of properties and applications of these systems, a…
Sustainability reporting and public value: Evidence from port authorities
2023
Due to the growing importance of Port Authorities (PAs) in pursuing economic, social, and environmental goals, scholars and policymakers should understand how these PAs can contribute to creating public value. By adopting the strategic triangle framework of public value, we studied how Italian PAs create public value by investigating their non-financial disclosures. For this purpose, we performed a cluster analysis and a lexical correspondence analysis on the textual content of the sustainability reports of eight Italian PAs. The study results allowed us to understand how PAs preserve and disseminate public value, obtain legitimacy and support from stakeholders, and build operational capaci…