bluuebunny/crossref_metadata_2025 huggingface dataset:
Correlating High-energy IceCube Neutrinos with 5BZCAT Blazars and RFC Sources
Authors: Bellenghi Chiara , Padovani Paolo , Resconi Elisa , Giommi Paolo
Published: September 2023

We investigate the possibility that blazars in the Roma-BZCAT Multifrequency Catalogue of Blazars (5BZCAT) are sources of the high-energy astrophysical neutrinos detected by the IceCube Neutrino Observatory, as recently suggested by Buson et al. Although we can reproduce their ∼4.5σ result, which applies to 7 yr of neutrino data in the southern sky, we find no significant correlation with 5BZCAT sources when extending the search to the northern sky, where IceCube is most sensitive to astrophysical signals. To further test this scenario, we use a larger sample consisting of 10 yr of neutrino data recently released by the IceCube Collaboration, this time finding no significant correlation in neither the southern nor the northern sky. These results suggest that the strong correlation reported by Buson et al. using 5BZCAT could be due to a statistical fluctuation and possibly the spatial and flux nonuniformities in the blazar sample. We perform some additional correlation tests using the more uniform, flux-limited, and blazar-dominated Radio Fundamental Catalogue and find a ∼3.2σ equivalent p-value when correlating it with the 7 yr southern neutrino sky. However, this correlation disappears completely when extending the analysis to the northern sky and when analyzing 10 yr of all-sky neutrino data. Our findings support a scenario where the contribution of the whole blazar class to the IceCube signal is relevant but not dominant, in agreement with most previous studies.
Explosive radiation versus old relicts: The complex history of Ethiopian Trechina, with description of a new genus and a new subgenus (Coleoptera, Carabidae, Trechini)
Authors: Faille Arnaud , Hofmann Sylvia , Merene Yeshitla , Hauth David , Opgenoorth Lars , Woldehawariat Yitbarek , Schmidt Joachim
Published: September 2023

The trechine beetle fauna (Coleoptera, Carabidae) of the Ethiopian Highlands is known to be highly diverse in species, and many species groups were recognized to be characterized by unusual character states of external and genital morphology. Earlier authors described several genera and subgenera of Ethiopian Trechina endemic to certain high mountains of the country. However, the relationships of these species groups and their evolutionary history are unknown so far. Here, we present the first molecular phylogenetic analysis of Ethiopian Trechina, detect several synonymic names under Trechus sensu lato, and introduce two new species groups to the country’s fauna: the monotypic genus Baehria Schmidt & Faille, gen. nov., with the type species B. separatasp. nov. from Mt. Choke in northern Ethiopia, and the Trechus subgenus Abunetrechus Schmidt & Faille, subgen. nov., with the type species T. bipartitus Raffray, 1885; this subgenus includes three species of northern Ethiopia. We show that the composition of the Ethiopian fauna is based on multiple events of immigration, which started simultaneously with or some million years after the Oligocene-Early Miocene orogenic events north and south of the Rift Valley. Our results support the habitat island hypothesis for the evolution of the Ethiopian highland fauna. We found no evidence for an alternative hypothesis assuming a close connection of the Trechina immigration to Ethiopia and Pleistocene cooling. We, thus, conclude that the geomorphological development rather than the climatic changes are the main drivers of the diversification of the high-altitude Trechina fauna in Ethiopia.
Saisir l’expérience familiale d’enfants des classes supérieures scolarisés dans l’enseignement catholique
Authors: Grisez Émilie
Published: September 2023

L’article porte sur la pluralité des expériences familiales et éducatives d’enfants des classes supérieures scolarisés en CM2 dans une école catholique parisienne. Leur discours a été recueilli par des entretiens (n = 26) et un questionnaire (n = 52) distribué à l’issue d’une ethnographie d’un an dans l’école. Selon le cadre familial dans lequel ils grandissent, les enfants entretiennent des rapports différenciés à leurs parents, frères et sœurs et camarades d’école. Dans les familles « traditionnelles », les relations parents/enfants sont fondées sur une autorité naturelle de l’adulte et les enfants passent un temps considérable avec leur fratrie et leurs amis d’école. Par contraste, les enfants de « managers » ont davantage de pouvoir, dans le rapport aux adultes, pour affirmer leur individualité, tandis qu’ils développent une grande autonomie avec leurs pairs. Enfin, les enfants d’« intellectuels » tissent avec leurs parents des relations fondées sur le dialogue et un idéal égalitaire ; ils sont davantage distants de leurs pairs. De ces configurations familiales résultent des identités et des dispositions enfantines différenciées.
Surprise Billing in Elective Shoulder Surgery and Its Effect on Patient Satisfaction
Authors: McCahon Joseph A. S. , Lynch Jeffrey C. , Radack Tyler , Austin Luke S.
Published: September 2023

Patients often receive multiple bills following surgery, which may come as a surprise to them if they are not appropriately informed or educated prior to surgery. The purpose of this study was to identify whether surprise billing occurs following shoulder rotator cuff repair and its effect on patient satisfaction. The study surveyed adult patients who underwent elective rotator cuff repair from January 2020 to October 2021. Patients were asked if they received unexpected bills after their surgery, as well as about details regarding those bills. Additionally, patients were asked about their medical insurance carrier, knowledge of the billing process prior to surgery, and how they felt the process could be improved. Finally, patients were asked how these bills and the overall billing process affected their surgical satisfaction. Of the 158 responses, 25% of the patients stated they received at least one surprise bill following their rotator cuff surgery, with 57% of these bills being greater than $1000. Patients who received surprise bills reported being significantly less satisfied with their surgery (
P
<.001) and felt their billing experience affected their surgical satisfaction (64% vs 9%,
P
<.001). One in 4 patients undergoing elective rotator cuff repair received a surprise bill following surgery. These bills were monetarily substantial and significantly affected surgical satisfaction. Although surgeons may be unable to limit the amount of bills patients receive postoperatively, increased communication and education regarding the perioperative billing process may prove to be beneficial for both patient satisfaction and the physician–patient relationship. [
Orthopedics
. 2024;47(2):123–127.]
Facebook Data Analytics: An Orthopedic Arthroplasty Case Study and Guide for Physicians
Authors: Florance Jonathon , Dattilo Jonathan , Goyal Nitin , Seyler Thorsten
Published: September 2023

Social media is increasingly used for health queries and subspecialist selection, but physicians receive little training in its use. This case study describes use of the free data tool Facebook Audience Insights to understand population demographics relevant to an orthopedic practice. Facebook Audience Insights was used to compare demographics and activity patterns of two patient samples typical of total joint arthroplasty (TJA)—young TJA (ages 55–64 years) and Medicare TJA (age ≥65 years)—in May 2020. Creation of a professional Facebook page is described accompanied by the demonstration of Audience Insights to analyze regional user patterns. A local sample of Facebook users was then compared with a single orthopedic practice's Facebook traffic. Facebook use is common among patients undergoing TJA, and the proportion of self-identified women increases with age (young TJA, 53% women; Medicare TJA, 63% women). Women are more interactive Facebook users across all age ranges, with more frequent comments, “Liked” pages, and advertisement clicks. Analysis of a local Facebook population revealed a lower proportion of TJA-aged patients than the national cohort; however, TJA-aged patients represented 38% of the practice's Facebook page traffic, with a predominance of visitors being women (26% women, 12% men). Facebook demonstrates a high prevalence of users in the typical age range for TJA. Those users were common on an orthopedic practice Facebook page, suggesting social media may be an effective medium for engaging patients. [
Orthopedics
. 2024;47(2):e79–e84.]
The Rapid Development of Artificial Intelligence: GPT-4's Performance on Orthopedic Surgery Board Questions
Authors: Hofmann Hayden L. , Guerra Gage A. , Le Jonathan L. , Wong Alexander M. , Hofmann Grady H. , Mayfield Cory K. , Petrigliano Frank A. , Liu Joseph N.
Published: September 2023

Advances in artificial intelligence and machine learning models, like Chat Generative Pre-trained Transformer (ChatGPT), have occurred at a remarkably fast rate. OpenAI released its newest model of ChatGPT, GPT-4, in March 2023. It offers a wide range of medical applications. The model has demonstrated notable proficiency on many medical board examinations. This study sought to assess GPT-4's performance on the Orthopaedic In-Training Examination (OITE) used to prepare residents for the American Board of Orthopaedic Surgery (ABOS) Part I Examination. The data gathered from GPT-4's performance were additionally compared with the data of the previous iteration of ChatGPT, GPT-3.5, which was released 4 months before GPT-4. GPT-4 correctly answered 251 of the 396 attempted questions (63.4%), whereas GPT-3.5 correctly answered 46.3% of 410 attempted questions. GPT-4 was significantly more accurate than GPT-3.5 on orthopedic board-style questions (
P
<.00001). GPT-4's performance is most comparable to that of an average third-year orthopedic surgery resident, while GPT-3.5 performed below an average orthopedic intern. GPT-4's overall accuracy was just below the approximate threshold that indicates a likely pass on the ABOS Part I Examination. Our results demonstrate significant improvements in OpenAI's newest model, GPT-4. Future studies should assess potential clinical applications as AI models continue to be trained on larger data sets and offer more capabilities. [
Orthopedics
. 2024;47(2):e85–e89.]
A quaternion Sylvester equation solver through noise-resilient zeroing neural networks with application to control the SFM chaotic system
Authors: Aoun Sondess B. , Derbel Nabil , Jerbi Houssem , Simos Theodore E. , Mourtas Spyridon D. , Katsikis Vasilios N.
Published: September 2023

Dynamic Sylvester equation (DSE) problems have drawn a lot of interest from academics due to its importance in science and engineering. Due to this, the quest for the quaternion DSE (QDSE) solution is the subject of this work. This is accomplished using the zeroing neural network (ZNN) technique, which has achieved considerable success in tackling time-varying issues. Keeping in mind that the original ZNN can handle QDSE successfully in a noise-free environment, but it might not work in a noisy one, and the noise-resilient ZNN (NZNN) technique is also utilized. In light of that, one new ZNN model is introduced to solve the QDSE problem and one new NZNN model is introduced to solve the QDSE problem under different types of noises. Two simulation experiments and one application to control of the sine function memristor (SFM) chaotic system show that the models function superbly.
Hofmusiker auf Abwegen. Beethoven im fürstlichen Dienst
Authors: Rathgeber Eike
Published: September 2023

Gegen das von der Tradition verbreitete Bild eines misanthropischen, am Rande der Gesellschaft lebenden Beethoven zeigt der Beitrag, wie der Komponist, der schon früh in den aristokratischen Kreisen Bonns verkehrte, sich leicht in die Wiener High Society integrierte. Das Aufkommen neuer Ideen und die Nachwirkungen der Französischen Revolution änderten diese Situation nicht grundlegend, sondern ermöglichten im Gegenteil einen freien Ton im Austausch zwischen Beethoven und seinen aristokratischen Gönnern, der erahnen lässt, wie eine erträumte „freie Republik des Geistes“ hätte aussehen können.
Beethoven, un compositeur autrichien dans l’Europe du xixe siècle ?
Authors: Cailliez Matthieu
Published: September 2023

Né à Bonn en 1770, Ludwig van Beethoven s’installe à Vienne en 1792 pour y demeurer jusqu’à son décès en 1827. La production musicale du compositeur rencontre rapidement un succès national et international qui dépasse largement les frontières du monde germanique. Cet article a pour objet la réception de Beethoven au xixe siècle au miroir de la presse musicale viennoise, une réception largement teintée de patriotisme autrichien, qui se plaît à refuser à l’Allemagne en général, et à Bonn en particulier, la primauté de l’héritage du compositeur. L’étude comprend quatre parties, consacrées respectivement aux dernières années du compositeur et à son décès en 1827, à l’inauguration du monument Beethoven à Bonn en août 1845, au centenaire de sa naissance, contemporain de l’unité allemande en 1870-1871, et aux recensions des nombreux ouvrages et monographies consacrés au compositeur tout au long du xixe siècle.
« Ich habe Beethoven eigentlich geliebt. » L’image ambivalente de Beethoven chez Franz Grillparzer
Authors: Lajarrige Jacques
Published: September 2023

À travers les nombreux textes qu’il lui a consacrés (poèmes, Journal, oraisons funèbres et ses Souvenirs sur Beethoven), l’article analyse le jugement ambivalent que Grillparzer, admirateur inconditionnel de Mozart, porta sur son contemporain Beethoven, dont il rejette la démesure et l’esthétique musicale. Si la caractérisation de Beethoven et de sa musique par Grillparzer se soustrait au carcan de la seule figuration illustrative, elle débouche en revanche sur une réelle problématisation de son image, tout comme elle chappe à toute vénération inconditionnelle, n’empruntant ni la voie d’une sacralisation esthétique ni celle d’un culte de la personnalité. Une autre idée centrale, entre temps démentie par les faits, et qui revient sous différentes formes et à différentes époques sans grande variation, est que Beethoven, victime de son génie si singulier, serait voué à une postérité artistique stérile. Enfin, l’article cherche à comprendre les raisons de l’échec de leur collaboration au sujet d’un projet d’opéra commun, Mélusine, qui ne vit jamais le jour.
« Beethoven aber nennen wir unser »
Authors: Candoni Jean-François
Published: September 2023

Devenue une figure tutélaire pour la plupart des musiciens et des musicographes du xixe siècle, Beethoven est l’objet d’âpres discussions entre les partisans de la Neudeutsche Schule (la tendance Wagner-Liszt) et le musicologue viennois Eduard Hanslick. Les premiers voient dans ses compositions la légitimation de leur conception d’une musique signifiante, tandis que le second défend l’idée d’une continuité du classicisme viennois, incarné par Mozart et Haydn, orienté vers l’idée du beau musical et reposant sur le principe de l’autonomie musicale. Les débats esthétiques sont sous-tendus par des considérations idéologiques opposant ceux qui cherchent à s’approprier l’héritage de Beethoven au nom d’une conception métaphysique et protestante de l’art des sons à Eduard Hanslick, dont les recensions parues dans la presse viennoise contribuent à opérer une « patrimonialisation » autrichienne de son œuvre.
Fidelio à Vienne et la reconstruction de l’État autrichien après 1945
Authors: Veit Patrice
Published: September 2023

Le 5 octobre 1955, le Staatsoper à Vienne, reconstruit, rouvrait solennellement avec une représentation de Fidelio, l’unique opéra de Beethoven. Si Vienne ne constitue pas le seul cas de soirée inaugurale après la Seconde Guerre mondiale en programmant Fidelio, le cas viennois représente néanmoins un événement tout à fait singulier. L’opéra de Beethoven et la réouverture de l’Opéra y acquièrent une dimension hautement symbolique et constituent des « marqueurs » dans le processus de reconstruction d’un État autrichien libre et indépendant, de 1945 à 1955. De quelle façon l’opéra de Beethoven a-t-il été intégré à la reconstruction matérielle, politique et culturelle de l’Autriche dans l’immédiat après-guerre et a pu être exploité comme outil politique en vue de contribuer au redressement du pays après 1945 ?
L’impact de la transformation numérique sur les modèles d’affaires : le cas des cabinets de conseil en financement de l’innovation
Authors: WATTIEZ Nicolas , GOY Hervé
Published: September 2023

En France, les aides publiques au financement de la recherche et de l’innovation se sont multipliées depuis le début des années 2000. Avec l’avènement du crédit impôt recherche, une industrie du conseil en financement de l’innovation s’est progressivement développée. Cette niche du secteur du conseil aux entreprises a très peu été étudiée, si bien que les effets de la transformation numérique sur le modèle économique traditionnel des cabinets du secteur restent, jusqu’à ce jour, largement méconnus. Cet article vise à combler cette lacune à partir d’une étude qualitative à visée exploratoire menée auprès de 16 acteurs du secteur en France. Nos résultats mettent en évidence trois modalités d’évolution des modèles d’affaires des cabinets de conseil en financement de l’innovation sous l’effet de la numérisation. Les similitudes mais aussi les différences avec les résultats de travaux proches menés dans l’industrie du conseil généraliste sont finalement discutées.
User Interaction Within Online Innovation Communities
Authors: Chen Jiali , Li Yiying , Feng Mengzhen , Zhang Xinru
Published: September 2023

In the digital era, enterprises have established online innovation communities to attract customers to participate. Presented in this study is user interactions within these communities using social network analysis. By identifying distinct subgroups within the network and comparing the user interactions among these subgroups, this research aims to identify the group diversity of online interactions. The findings indicate that dialogists are more willing to interact and hold a favorable network position, followed by questioners, while answerers have the lowest level of interaction. User subgroups are identified using k-core analysis. The higher the value of the core k, the more interactions between users in the k-core subgroup and the better the network position. By combining both ego-centered and group dimensions of online interaction characteristics, this paper also outlines an investigation into an empirical study on the influence of user interactions on community recognition. The results confirm heterogeneous effects among different subgroups.
Ferramentas pós-críticas educacionais e curriculares para pesquisar e analisar vídeos
Authors: Oliveira Danilo Araujo de , Sales Shirlei
Published: September 2023

Neste artigo, partimos dos percursos de uma tese de Doutorado que explorou o funcionamento de um currículo no ciberespaço mobilizando ferramentas metodológicas com elementos da netnografia e análise do discurso de inspiração foucaultiana, desde uma perspectiva pós-crítica. Aqui o nosso foco será descrever como, ao mobilizar essas ferramentas, analisamos um conjunto de vídeos divulgados no currículo investigado. Essa ação compõe o esforço metodológico para consolidação de um campo epistemológico de como operar ao analisar o funcionamento de um currículo cultural não-escolar. O que sistematizamos aqui não se constitui prescrição para repetição de uma fórmula, mas busca funcionar como inspiração e contribuição na construção de metodologias de experimentação e invenção curriculares.
Cartografia para pesquisar currículos e infâncias em dissidências: um exercício experimental de invenção
Authors: Silva João Paulo de Lorena , Paraíso Marlucy Alves
Published: September 2023

Este artigo explora os movimentos constitutivos de uma cartografia inventada para pesquisar currículos e infâncias em dissidências. Instalando-se no território das metodologias pós-críticas em Educação e Currículo, objetiva mostrar o fazer cartográfico de uma pesquisa que investigou os agenciamentos de vida e morte que as infâncias em dissidências de gênero e sexualidade fazem no currículo. A cartografia é um modo de investigar um processo em produção, de acompanhar um traçado incerto, um certo tempo que dura. Inspirada nos trabalhos de Gilles Deleuze e Félix Guattari, ela se ocupa em estudar processos subjetivos, acompanhando os agenciamentos que possibilitam um acontecimento. O argumento aqui desenvolvido é o de que, para cartografar currículos e infâncias em dissidências, faz-se necessário organizar encontros capazes de apreender os acontecimentos, compor com as sensações produzidas nos entrelugares dos corpos e narrar em dissidência, fazendo da experiência narrativa um uso menor, intensivo e geográfico.
Time Optimization Proposal for the Design and Execution of Plumbing Systems Implementing VDC Methodology: 6-Floor Building Case Study
Authors: Quinteros Perez Estella Arianna Nicole , Inciso Mayoria Vanessa Estefanía , Del Savio Alexandre Almeida
Published: September 2023

The architecture, engineering, and construction industry has been characterized in recent years by large losses of resources, time, and costs. One of the main reasons for this problem is the lack of integration and collaboration between project stakeholders in different areas and specialties. The design, coordination and installation of mechanical, plumbing, electrical (MEP), and fire protection (FP) systems represent one of the main areas of improvement in the construction industry, especially in complex projects. The present research implements the Virtual, Design and Construction (VDC) methodology as an empowering agent in the optimization of time in the design and execution processes of plumbing systems in a 6-floor building of approximately 2,120 square meters in Lima, Peru. Initially, the traditional workflow for designing and executing sanitary systems was mapped. Then, an optimized workflow was developed considering the principles of the VDC methodology. As a result of the optimized workflow, it is possible to foresee a 5% reduction in design time and a 23% reduction in execution time.
Impedance Spectroscopy Analysis of (1-x)Ba0.06(Na1/2Bi1/2)0.94TiO3-xNaTaO3 Ceramics
Authors: Rajwar Santosh , Pandey Sushil Kumar , Roy Sumit K.
Published: September 2023

The conventional solid-state reaction method was used to prepare the lead-free solid-solution (1-x)Ba0.06(Na0.5Bi0.5)0.94TiO3-xNaTaO3; 0 ≤ x ≤ 1. X-ray diffraction analysis of all the compositions of the series confirmed the solid solution’s successful formation. The electrical impedance and conductivity of the material were studied using the impedance spectroscopy method at temperatures ranging from room temperature to 500○C. For the Ba0.06(Na0.5Bi0.5)0.94TiO3 rich compositions ac conductivity increased with frequency at all temperatures, whereas for the NaTaO3 rich compositions ac conductivity exhibited a frequency-independent behaviour. As the amount of NaTaO3 incorporated into the compound Ba0.06(Na0.5Bi0.5)0.94TiO3 was increased, a transition occurred in the electrical impedance, specifically, the impedance values shifted from low to high. A theoretical model based on correlated barrier hopping (CBH) has been used to explain the conduction mechanism in these solid solutions.
Sustainable Manufacturing Process of ZnO Nanoparticles and its Biomedical Activities - A Review from Recent Literature
Authors: Meji M. Abisha , Usha D.
Published: September 2023

The metals and metal oxides that are synthesized at the nanoscale have found a wide range of applications in a variety of fields including textile, food, automotive, cosmetic and pharmaceuticals. These nanoparticles (NPs) possess unique properties including surface area, shape, size, optical properties, low toxicity, huge band gap and high binding energy. As a simple, affordable, and secure material for human welfare, ZnO NPs are of particular importance among the other NPs, which possess exceptional thermal and chemical as well as distinctive optical properties. The green manufacturing technique of ZnO NPs using plant/herbage extract has been documented by various researchers over the past decade. But still, there is number of prevailing issues that prevent the large-scale production of NPs and subsequent applications. This article reviews the recent (2021 and 2022) literature on the simple, efficient, affordable and environmentally friendly green methods for bio-synthesis of Zinc salts such as zinc sulphate (ZnSO4), zinc nitrate (Zn (NO3)2) and zinc acetate (Zn (CH3CO2)2) using different plant/herbage extract which are collected from various locations. Zinc salts were utilized as a precursor in this method and phytochemicals presents in the plant extract reduces the zinc salt to zinc oxide and stabilize the NPs. Discussion has been done for characterization of synthesized ZnO NPs and also the activities including Anti-cancer, Anti-fungal, and Anti-bacteria.
Study on the Current State of Research in the Field of Titanium Aluminides Milling Processes
Authors: Radu Petrica , Schnakovszky Carol , Herghelegiu Eugen , García-Martínez Enrique , Miguel Valentín
Published: September 2023

Recently, there has been a significant interest in the research and industrial application of titanium aluminides. These alloys present great relevance in the aerospace and automotive sectors, where machining processes for the manufacture of high-dimensional precision parts are a fundamental aspect. The interest in the use of these alloys is since they combine a very low density, lower than the Ti6Al4V alloy typically used in these applications, and exceptional mechanical properties at high temperatures. However, titanium aluminides present great difficulties to be machined, being classified as a difficult-to-cut material, as they have high hardness and brittleness, low thermal conductivity, and high chemical reactivity. In the last decade, research on the machining processes of these intermetallic composites has been carried out, although few published works can be found. In particular, research on milling processes is incipient, and further progress is needed in the study and characterization of the process. In this work, a review of the state of the art is carried out to establish the achievements made concerning technological parameters, improvements with the application of sustainable lubrication systems, and the efficiency of the process in terms of tool wear and cutting temperature. In this way, future lines of research in this field would be established. In short, the results obtained aim at a further definition of the tribological system involved in titanium aluminide milling, the use of cryogenic and mixed MQL-cryogenic lubrication, and the definition of tool configurations that allow higher machining speeds to be achieved.
Dissimilar Welding of Nickel-Based Superalloy - A Review
Authors: Vinoth Kumar D. , Gejendhiran S. , Karpagaraj A.
Published: September 2023

Fundamental investigation of mechanical properties on different types of dissimilar welded joints was described in this paper. Dissimilar metal welding was generally employed in chemical and petrochemical plants, oil and gas industries, nuclear power plants and aerospace industries etc. For enriching the structural integrity of aerospace industries, material with high temperature resistance and high corrosion resistance is needed. For fulfilling the above criteria, Inconel 718 (IN 718) was selected due to its felicitous strengths such as yield, tensile, and creep at high temperatures with significant corrosion properties. This paper reviews the different welding processes and the impact they have on mechanical properties, as well as some difficulties related to welding dissimilar metals. Gas Tungsten Arc Welding (GTAW) process comprises high micro-hardness and tensile strength properties during dissimilar welding of IN 718. SS 410 and Inconel 625 materials hold high micro-hardness and tensile strength values respectively. The effect of IN 718 filler metal has also been discussed in this paper. Some of the dissimilar welding defects can be eliminated by IN 718 filler metal. This paper will give better directions to the researchers to focus on future studies.
Design and Simulation of Grid Connected Inverters for Solar Photovoltaic Applications
Authors: Swargiary Jitumoni , Choudhury Pradyumna Kumar
Published: September 2023

Solar photovoltaic (SPV) systems have become predominant in recent years and are beingwidely used as additional power supply to enhance power availability into the utility grid. Researchers have begun to explore more into the field of renewable energy sources (RES). Even though RES has environmental advantages, its unpredictable and intermittent nature, lack of proper technology, and low production efficiency has prevented RES to be a conventional energy source. Solar photovoltaic (SPV) systems produce electrical energy from solar energy. A solar panel converts the solar energy to DC electrical energy, after which a power inverter is used in order to convert DC power obtained from solar energy to AC power which can be fed to the grid. While feeding power from inverter to the grid, the synchronization of inverter output signal to that of the grid signal is necessary, without which failures and faults can occur in the grid which can damage electrical appliances. In the present work, simulation of a three-phase H-bridge voltage source inverter (VSI) is designed in MATLAB/Simulink platform. An LC filter is used to reduce the harmonic content of the inverter output. A synchronization technique is also developed for grid interconnection. A MULTISIM simulation model of a single-phase inverter along with an LC filter is prepared and finally a hardware model is fabricated.
Optimization of Existing Integrated BCS and AC Unit in Electric Vehicle
Authors: Tiwari Prashasti , Sharma Samridhi , Goel Ojasvi , Chaudhary Tina
Published: September 2023

As concerns about oil depletion and security of supply remain as serious as ever, and in the face of the consequences of climate change due to greenhouse gas emissions, the introduction of electric vehicles (EVs) was seen as an alternate technology that could lead to decarbonization. However, factors such as heat generation in battery limit weaken the performance under extreme driving conditions. Therefore, it is important to investigate the possible implication of heat generation on the various components of the battery and make the best course of action for them. Therefore, understanding the effect of temperature and accurately measuring the temperature inside the batteries is important for proper battery management.
Extraction and Characterization of Cellulosic Fiber from Banana, Sugarcane, and Napier Grass
Authors: Sales Showna Lee T. , Abellana Virgilio , Lobarbio Camila Flor Y. , Dano Ian Christopher , Balbutin Jr. Richard P.
Published: September 2023

Cellulosic fibers are one of the trend studies being conducted from the recent research due to their cost-effectiveness and abundance as biomass waste products from different plantations. The study aims to fabricate a dew extractor machine and analyze and characterize fibers based on their physical, mechanical, and chemical properties. The machine achieved the required torque, which is 370.645 N.m, and a speed of 28.82 rpm for the initial process for the sources of fiber by using a chain drive. Among the three fibers, the banana shows greater tensile strength with 221.225 MPa - 418.59 7MPa for untreated and 191.376 MPa – 715.428 MPa for treated. Napier has the smallest value of tensile strength with 77.944 MPa – 146.731 MPa for untreated and 76.048 MPa – 287.689 MPa for treated. The chemical properties of the fibers were analyzed using Fourier Transform Infrared Spectroscopy shows all three fibers have a similar single-, triple- and double-bond, namely a secondary aliphatic alcohol, alkene, and a non-conjugated alkene functional group. It can be concluded that treated fibers can withstand more stress, stretch even more, and therefore are more elastic than untreated fibers.
A Review Paper on Mobile Robots Applications in Search and Rescue Operations
Authors: Arunkumar V. , Rajasekar Devika , Aishwarya N.
Published: September 2023

Mobile robots have gained popularity in recent decades, owing to its capacity to be deployed in dangerous environments without jeopardizing humans. Mobile robotic vehicles are frequently used today to carry out tasks including environmental recognition, inspecting urbanized and industrial terrains, for search and rescue activities. Presently, search and rescue robot technology is progressing from experimental and theoretical studies towards applicability. The proper execution of a mobile robotic movement in a working environment depends on being aware of the nearby obstacles and avoiding any collisions that may occur. Robots today are integrated with several smart technologies that are necessary to model the environment and localize their position, control the movements, identify obstructions, and avoid obstacles based on the terrain and surface they are employed on by applying navigational procedures. This paper explores the various mobile robotics systems and their working currently in place utilized for rescue and search operations.
Influence of Power and Frequency in the Femtosecond Laser Texturing of Ti6Al4V
Authors: Salguero Gómez Jorge , Romero Marcelo , Del Sol Irene , Batista Moises , Vazquez Martinez Juan Manuel
Published: September 2023

Laser Surface Texturing (LST) has demonstrated to be the most reliable technique for the micro-modification of surfaces, allowing to obtain taylored surfaces. These modifications, depending on the basic micro-geometry and its repetition pattern, can provide special functionalities to a surface, such as hydrophilicity, hydrophobicity, reflectance, anti-bacterial, ostheo-integrability, as well as custom aesthetic, among others.Nevertheless, when a laser irradiates metallic surfaces, the micro-structure can be modified due to the heat induced, changing the mechanical properties of the surface. To avoid these effects, cold or ultra-short pulsed lasers must be used.A cold laser emits optical pulses with a duration below 1 ps (ultra-short pulses), in the domain of femtoseconds (fs=10-15s). These ultra-short pulses, combined with high frequencies, in the megahertz region, leads to pulse trains with high repetition rates. This allows the sublimation of the material, keeping it relatively cold due to the short exposition time to irradiation.Ti6Al4V is the most used Ti alloy, thanks to its excellent weight/mechanical properties ratio. Nevertheless, its tribological behavior is very poor. Although there is intense research to improve it by using LST, the study of the influence of femtosecond laser parameters in the desired micro-geometries is still a gap in the scientific literature.In this research, a study of the influence of power (up to 50 W) and frequency (up to 2 MHz) in the fs-laser texturing of Ti6Al4V is presented. Local pulse repetition, linear and surface textures have been studied by combining power and frequency in these ranges, evaluating the geometry obtained by variable focus microscopy. The study carried out has allowed to determine the optimal set of parameters as a function on the target texture geometry, as well as the range in which the LST removal process changes from sublimation (for texturing) to melting (for micro-machining).
Assessment of Solar-Biomass Power Potential in the State of Punjab, India
Authors: Hooda Deepti , Saraswat Santosh , Gakkhar Nikhil , Kumar Manoj
Published: September 2023

During COP26, India made commitments regarding generation of 50% of its electricity from non-fossil fuel resources by year 2030, which includes utilization of renewable energy sources. Keeping in view of the rapidly growing energy demand, the current study explore the exploitable solar and biomass power potential in the state of Punjab, India. This work discusses the potential and feasibility analysis of solar-biomass hybrid energy system for power generation in all districts of Punjab. Solar energy potential and biomass generation estimation have been identified using various parameters like global solar radiation, sunshine hours, solar suitable land area, surplus biomass, heating values, and feed rate. Simulations for feasibility analysis were performed on System Advisor Model using data available for all the districts. The renewable output of the study is estimated in terms of capacity potential (MW) and exploitable electricity potential (MWh) for the state of Punjab. The study showed that Rupnagar district has the maximum solar potential (i.e., 69.03 MW) among all the districts of Punjab due to huge availability of wasteland area whereas, Jalandhar district has the minimum solar potential (i.e., 0.23MW) in Punjab due to less availability of wasteland area. Similarly, Sangrur districts produces huge amount of biomass (6838.23 kt/yr) while Nawanshahr produces least amount of biomass power. In the end, the study concluded that the electricity potential for both technologies and its capability to fulfil entire electricity demand of the state.
Hexacopter-Based Modern Remote Sensing Using the YOLO Algorithm
Authors: Sayyad Javed , Ramesh B.T. , Attarde Khush , Bongale Arunkumar
Published: September 2023

Remote sensing technology is essential to various industries such as agriculture, meteorology, surveillance, defence, manufacturing and processing industries. Several sectors widely adopt this technology, so much research has been conducted in this domain. In satellite applications, research in remote sensing has been performed for seven decades. Images and videos captured by satellites have less resolution, which undoubtedly reduces object detection and data analysis accuracy. After analysis, the imprecise nature of captured data might cause difficulties in fields such as defence and agriculture. To combat this problem, in this research, we developed a hexacopter-based modern remote sensing device that can fly with manual intervention and also has an emergency autopilot function. The proposed system is equipped with a compact high-resolution camera which captures images with a higher frame rate. The developed system uses the YOLO v4 algorithm, which is fast and accurate to recognise and track an item or a particular individual in real time. Logged data is shared with the ground station to perform the desired task. The hexacopter-based system has more mobility than the satellite-based system, which overcomes the drawback of the limited range of the proposed system. In this proposed system, we have connected a precise flight controller and a Raspberry Pi 3 Model A+ microprocessor board with other electronic components to more accurately control hexacopter flying and real-time object identification and tracking.
Research in ophthalmology
Authors: Joint Editors .
Published: September 2023

No abstract available
An investigation of combined effects of road capacity and accessibility on urban density, land use mix, and vitality
Authors: Dilrukshi D. M. V. A. , Jayasinghe A.
Published: September 2023

This study examines the combined impact of road accessibility and road capacity on urban form characteristics such as land use mix, building density, and vitality. The investigation was conducted in three cities in Sri Lanka: Colombo, Kurunegala, and Mawanalla. The study recognises the fundamental role of accessibility in shaping land use mix and urban densities and acknowledges the reciprocal relationship between transport infrastructure and land use decisions. It also recognises that the capacity of road infrastructure can influence land use choices and development patterns. Accessibility, in this context, can be thought of as the degree to which different parts of the city are well-connected and easily reachable. It includes not only the presence of roads but also their connectivity. By investigating how variations in accessibility and road capacity affect land use mix, densities, and vitality within the study areas, the study aims to discern the intricate relationships between transportation networks, land use, and density decisions. This study finds that accessibility has a stronger influence on density, land use mix, and vitality than road capacity. Further, the study finds that the influence of vehicle movement on land use mix, density, and vitality indicated a strong relationship, while the influence of pedestrian movement indicated a weak relationship. Accordingly, the findings of this study have practical implications for both transport and urban planning professionals and academics. Transport engineers can help promote desirable urban form characteristics by improving the accessibility of the road network. Urban planners can consider key findings when making zoning plans and urban development plans.
An unusual case of venous thoracic outlet syndrome in relation to the anatomical position of the subclavian vein valves in a young athlete
Authors: Pagani Anselmo , Baldazzi Giulia , Ricci Roberta , Bressan Maddalena , Menegatti Erica
Published: September 2023

Venous Thoracic Outlet Syndrome (vTOS) consists of upper extremities oedema, sometimes with varicose dilation of the superficial veins of the arm in consequence of compression and/or thrombosis of the subclavian vein. More specific factors, such as muscle hypertrophy, have additionally been registered in athletes. The case focuses on a 20-year-old male student in medicine, with an intense training activity in body building. The subject has presented symptoms of upper limbs oedema he has also reported heaviness and paresthesia in the left arm and hand. Varicose dilation of a superficial vein close to the axillary fossa was visible at naked eye. Both Doppler ultrasound evaluation and Angio TC were negative for venous thrombosis and/or complete obstruction from external compression. These reports depict an uncommon clinical scenario, which correlate an intense upper body training activity with the presence of a second valve distally of the first valve into the subclavian vein.
Root canal morphology of mandibular first molars: Comparison of the diagnostic accuracy of cone-beam computed tomography and the sectioning technique
Authors: Yazdizadeh Mohammad , Alavinezhad Parniyan , Sadrishahrezaei Abtin , Sharifishoshtari Sanaz
Published: September 2023

Background:

A successful endodontic treatment requires a comprehensive knowledge of the root canal morphology. This study compared the diagnostic accuracy of cone-beam computed tomography (CBCT) and the sectioning technique for the assessment of mandibular first molar (MFM) root canal morphology.

Materials and Methods:

In this in vitro, experimental study, 48 eligible MFMs were mounted in 12 blocks (groups of 4) made of acrylic resin and sheep bone powder and underwent CBCT. Next, the teeth were mounted in transparent self-cure acrylic blocks, and their roots were sectioned at three points with 3 mm intervals. Images underwent multiplanar reconstruction in NNT Viewer software and were analyzed by one radiologist with the cooperation of an endodontist. The sections were also evaluated by an endodontist under a stereomicroscope (gold standard). The frequency and percentage of single-canal, and two-canal roots were determined by each technique. The agreement between CBCT and the Gold standard was analyzed by calculating the kappa coefficient (P < 0.05).

Results:

The diagnostic accuracy of CBCT for the assessment of the MFM root canal morphology was 80% on the mesial surface, 99% in the distal surface, and 96% in total. In the mesial surface, 94.2% of two-canal roots and 66.7% of single-canal roots were correctly detected by CBCT. These values were 100% and 97.4% in the distal surface, and 95.2% and 95.8% in total, respectively. A significant agreement was noted between CBCT and the Gold standard with κ =0.412 for the mesial, 0.939 for the distal, and 0.907 for the total surfaces (P < 0.001).

Conclusion:

CBCT can be reliably used for the assessment of the complex root canal morphology of MFMs when other modalities fall short.
Comparison of Effectiveness of Two Silver Compounds in Arresting Caries in Outreach Programs in Karnataka
Authors: Therathil Sona G , Kakarla Prasad Veeravenkata
Published: September 2023

Context:

Silver compounds have been used clinically in dentistry and have effectively arrested dental caries. However, their potential use in community outreach programs has not been explored.

Aims:

This study aims to investigate the effectiveness of two silver compounds, silver diamine fluoride (SDF) and silver nitrate (SN), in arresting caries in deciduous teeth when used in outreach programs.

Settings and Design:

This is a randomized trial with a split mouth design done in three primary schools in Dharwad city.

Subjects and Methods:

This study was conducted among 174 teeth in 58 subjects between the ages of 4 years and 6 years. Pairs of carious teeth in each subject were randomized into two groups: Group A and Group B. Teeth in Group A were treated with 38% SDF and teeth in Group B were treated with 25% SN. These teeth were examined for the arrest of caries after treatment, at the end of 3 months and 6 months.

Statistical Analysis:

Descriptive statistics were used to analyze the demographic characteristics and percentages of arrested and active carious lesions. Chi-square test was done to compare the proportion of arrested teeth within and between the groups.

Results:

All the teeth showed arrest of caries immediately after treatment in both the groups which significantly reduced after 6 months. The result also showed that there was no significant difference in the reduction of arrested carious teeth between the two groups.

Conclusions:

Both SDF and SN can be used in outreach programs with comparable effectiveness in arresting dental caries.
Multi-objective optimization model for sustainable production planning in textile MSMEs
Authors: Flores-Siguenza Pablo , Marmolejo-Saucedo Jose Antonio , Guamán Rodrigo
Published: September 2023

Textile MSMEs are characterized by their high influence on the economy of the countries, both for their contribution to the gross domestic product as well as for the generation of employment, in recent years the complexity of their operations, instability and lack of balance between economic, environmental and social factors, axes of sustainable development, stand out. It is necessary to implement approaches such as sustainable manufacturing and production planning, which seeks the creation of products with minimal environmental impact, safe for workers, and economically robust. In this context, this study aims to develop a multi-objective optimization model that enhances sustainable production planning in textile MSMEs. The methodology is based on two phases, the first one focused on the acquisition of information and the second one dedicated to the mathematical formulation of the model, where three objective functions focused on economic, environmental and social factors are proposed. The model is validated with real data from a textile MSME in Ecuador and different production alternatives are generated by proposing the implementation and use of photovoltaic energy as well as a greater use of personal protective equipment. One of the relevant conclusions of the study is the contribution to the textile industry with a sustainable decision support tool, where different scenarios for production planning and their respective economic, environmental and social consequences are shown.