bluuebunny/crossref_metadata_2025 huggingface dataset:
Impact of Discrete-Time Modeling on Dual Input Buck-SEPIC Converter
Authors: Venkatesh A. , Reddy B. Amarendra , Jyothsna T. R.
Published: March 2024

This paper addresses aspects of a two-input Buck-SEPIC dc-dc converter. This integrated DC-DC converter processes power from two sources, two switches, and four different energy storage elements. The designed converter is processing 48 volts from two sources Vg1 = 36 V and Vg2 = 60 V. The transfer function modeling of this converter plays an important role in addressing several crucial aspects like optimal parameter design, controller design, stability, and robustness issues. Here, two types of transfer function modeling aspects are considered: continuous-time and discrete-time. The discrete-time transfer function is derived by considering trailing-edge as well as leading-edge digital pulse-width modulation scheme (DPWM) and for each of these cases time-delays in the control loop are also included. The designed converter parameters L1, L2, C1, and C2 are based on the design equations. The transfer functions are obtained in continuous-time and discrete-time for the TI-BS converter in the MATLAB environment. The experimental validation of the TI-BS dc-dc converter is performed through Hardware in Loop (HIL) using the real-time environment of the OPAL RT. For TIBS converter polezero configurations and frequency response characteristics are plotted. Using these plots important characteristics related to the deviation in phase angle of frequency response at higher frequencies due to RHP zeros are observed. The simulation studies are performed considering a 36 V / 60 V to 48 V, 500 W, prototype, DC power distribution system. The detailed modeling aspects in continuous-time as well as in discrete time are discussed considering a two-input Buck-SEPIC converter. The mathematical derivations of four different transfer function matrices using discrete-time modeling (trailing-edge and leading-edge modulation) are discussed in detail along with timing diagrams considering interval-1 and interval-2 sampling. The frequency response of the TI-BS dc-dc converter is affected when it is modeled using the discrete-time models and such frequency response deviation in phase response is observed for the TI-BS converter. The nonminimum phase response of this converter is shown using the Bode frequency response in the MATLAB environment and verified using the pole-zero map.
Non-average Stability Analysis for a Boost Converter
Authors: Garcia Andres , Guillermo Eduardo
Published: March 2024

The purpose of this paper is to present a method for analyzing the stability of DC-DC boost converters providing a universal transfer function. This method relies on the application of the Laplace transform without any ad-hoc linear approximation or system linearization. A common methodology for evaluating the stability of DC-DC converters is the average method, which is essentially a linearization. In this paper, the Laplace transform is applied directly, resulting in a universal Z-transform model being used to design controllers and stability analyses as a discrete unifying transfer function. The examples cover both power and low voltage converters. Matlab simulations have been conducted to verify the theoretical findings. In particular, the second example considers a small 5V to 12V boost converter, which was previously examined in a Texas Instruments application note. The transfer functions and the Bode plot are provided.
An Analysis of Some Models of Prey-predator Interaction
Authors: Lagui Thierry Bi Boua , Dosso Mouhamadou , Sitionon Gossouhon
Published: March 2024

Biological models of basic prey-predator interaction have been studied. This consisted, at first, in analyzing the basic models of population dynamics such as the Malthus model, the Verhulst model, the Gompertz model and the model with Allee effect ; then, in a second step, to analyze the Lotka-Volterra model and its models improved by taking into account certain important hypotheses such as competition and/or cooperation between species, existence of refuge for prey and migration of species. For each population evolution model presented, a numerical illustration was made for its verification.
Hacia una sandbox en materia de movilidad
Authors: Bonet Tous Irene
Published: March 2024

SUMARIO: 1. Introducción: La idea del sandbox.—2. La razón de ser de un sandbox de carácter regulatorio.—3. La regulación del sandbox a nivel mundial.—4. El sandbox financiero.—5. El nuevo concepto de movilidad y sus desafíos.—6. El aterrizaje del sandbox en materia de movilidad.—7. Conclusiones.
Taxi y VTC como actores en la implementación y extensión de las Zonas de Bajas Emisiones (ZBE)
Authors: Tarrés Marc , Albalate Daniel , Fageda Xavier
Published: March 2024

Sumario: 1. Introducción y antecedentes.—2. Análisis jurídico del nuevo marco regulatorio y recomendaciones para las regulaciones locales.—3. El papel de la oferta de servicios de movilidad bajo demanda en la sostenibilidad de la movilidad y su contribución a las zonas de bajas emisiones.—4. Conclusiones.
Técnicas para preservar el equilibrio económico–financiero en los contratos del sector público a raíz del incremento generalizado de los precios de las materias primas
Authors: Carrillo Donaire Juan Antonio , Álvarez Medina Laura , Tarancón Babío Jesús , Borja Carmona Francisco
Published: March 2024

SUMARIO: 1. Introducción.—2. La revisión de precios de los contratos del sector público.—3. Vías de requilibrio al margen de los supuestos de revisión (ordinaria y excepcional) de precios.—4. Otras alternativas para preservar el equilibrio económico–financiero de los contratos.
On the question of the imperial rivalry (based on materials of British exhibitions at the last third of the XIX – early XX centuries)
Authors: Antonova Lidia
Published: March 2024

In the practice of British imperial propaganda, international and colonial exhibitions occupied a prominent place, which made it possible to demonstrate the prosperity and unity of the vast possessions of the metropolis. The 1886 Exhibition was the first event of its kind and left behind a huge amount of sources which made it possible not only to present exhibition sites, but to draw conclusions about the theory and practice of British imperial building. The last third of the 19th century is characterized by the intensification of colonial rivalry between the great powers, which was expressed not only in trade, economic and military, but also in ideological confrontation. In this regard, it is interesting to analyze what assessment was given in the context of the exhibitions to «other colonialists» and by what parameters British imperial practices were compared with the policies of the competing powers.
The article concludes that colonial exhibitions were indeed based on opposition, but it was not an opposition between Britain and other modern empires, but an opposition between the past and present of the British possessions themselves. In the past there was savagery and barbarism by the «uncivilized» natives or oppression by «bad» colonizers such as the French and Dutch. In the present, everything testified to progress, prosperity and peace within the British family.International exhibitions have always been an effective way to establish cooperation and have not been a method of demonstrating conflicts. The experience of the 1908 exhibition clearly demonstrated the peaceful potential of such projects.
Reclamação constitucional – aparente conflito entre Justiça do Trabalho e Supremo Tribunal Federal. Jurisprudência constitucional – coerência interna do sistema – apontamentos
Authors: Frediani Yone , Nepomuceno Borba Joselita
Published: March 2024

O presente texto destina-se ao estudo da reclamação constitucional como instrumento de preservação da autoridade das súmulas vinculantes, sua natureza jurídica e seu processamento legal, bem como os efeitos das decisões proferidas e as recentes decisões proferida pelo STF envolvendo matéria trabalhista.
Electrochemical studies of chemical reactions in molten salts
Authors:   Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kuznetsov S. A. ,   Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences
Published: March 2024

The tutorial discusses electrochemical methods for studying chemical reactions in molten salts, namely: metal-salt reactions, disproportionation, catalytic self-dissolution, competing complexation, polymerization and clustering. Methods for preventing the occurrence of chemical reactions that complicate the electrolysis process are considered. The results of the synthesis of functional materials using chemical reactions and their influence on the processes of electrolytic production of refractory metals are presented. The book is intended for graduate students, reseaches and specialists in the field of high temperatures physical chemistry and electrochemistry, the production of rare refractory metals and the creation of new fuctional materials.
Synthesis of photo- and ionochromic N-acylated 2-(aminomethylene)benzo[b]thiophene-3(2Н)-ones with a terminal phenanthroline group
Authors: Rybalkin Vladimir P , Zmeeva Sofiya Yu , Popova Lidiya L , Dubonosova Irina V , Karlutova Olga Yu , Demidov Oleg P , Dubonosov Alexander D , Bren Vladimir A
Published: March 2024

A series of novel photo- and ionochromic N-acylated 2-(aminomethylene)benzo[b]thiophene-3(2Н)-ones with a terminal phenanthroline receptor substituent was synthesized. Upon irradiation in acetonitrile or DMSO with light of 436 nm, they underwent Z–E isomerization of the C=C bond, followed by very fast N→O migration of the acyl group and the formation of nonemissive O-acylated isomers. These isomers were isolated preparatively and fully characterized by IR, 1H, and 13C NMR spectroscopy as well as HRMS and XRD methods. The reverse thermal reaction was catalyzed by protonic acids. N-Acylated compounds exclusively with Fe2+ formed nonfluorescent complexes with a contrast naked-eye effect: a color change of the solutions from yellow to dark orange. Subsequent selective interaction with AcO− led to the restoration of the initial absorption and emission properties. Thus, the obtained compounds represent dual-mode “on–off–on” switches of optical and fluorescent properties under sequential exposure to light and H+ or sequential addition of Fe2+ and AcO− ions.
Organization of outsourcing activity at Ukrainian enterprises
Authors: ZAKHARCHENKO Vitalii , KOVALYK Oksana , PARYNIUK Illia
Published: March 2024

Introduction. Outsourcing is the best strategy to be ahead of the competition in today's market. Researches indicate that the activity of outsourcing companies is strongly affected by the war, which is relevant for Ukrainian companies. But, despite the fact that the topic of outsourcing activities is actively discussed in the scientific literature, not enough attention is paid to the issue of describing specific stages of the implementation of this activity at enterprises.
The purpose of the paper is to determine the most optimal stages of the implementation of outsourcing activities at a Ukrainian enterprise in modern conditions.
Results. Because of different problems exists a need to develop appropriate stages of outsourcing activities at Ukrainian enterprises. The first stage shows whether outsourcing is profitable. At the second stage, clear goals for outsourcing are expected to be established. The third stage describes the development of a description of the project, and the fourth stage is the selection of an appropriate outsourcing engagement model. At the fifth stage, the project budget and payment terms are established. The sixth and seventh stages involve planning and appointing an outsourcing manager, who in the eighth stage should send the project description to the relevant firms and review the proposals. The ninth stage is to choose an outsourcing company. At the tenth stage, risks associated with outsourcing are managed. The results and processes of outsourcing activities need to be monitored at the eleventh stage. The twelfth stage includes evaluating and adjusting the outsourcing, and the last stage is the outsourcing report.
Conclusion. Outsourcing is a process that delegates some responsibilities and functions of the company to specific service providers. To create a successful outsourcing strategy at Ukrainian enterprises, it is advisable to implement thirteen stages of outsourcing activities. These stages should include the implementation of outsourcing opportunities and the management of related risks. Identifying risks with planned appropriate actions to mitigate them will set the company up for an active response. Understanding the implications of risk will help enterprise to have a control over the outsourcing process.
The state as a subject of private international law
Authors: SALOID Stanislav , KYRYCHENKO Serhii , KHLEBYNSKA Oleksandra
Published: March 2024

The paper considers various aspects of international cooperation, in particular, the state's participation in civil-law relations that regulate international private law. The authors note that states participate in interstate public-law and civil relations that regulate private international law.
The authors pay attention to the peculiarities of the legal status of the state in private legal relations, taking into account its sovereignty and ability to conduct international relations and conclude agreements.
Aspects and roles of civil-law relations are considered, such as the state's involvement in property and financial relations, in particular, construction of buildings abroad, ownership of property, lease of land and participation in joint ventures.
The authors note that it is important to distinguish between private-law and public-law relations in order to clarify the legal status of the state. The actions of the state in international private law relations and the performance of state duties as subjects of civil law are considered.
The analysis of the issue of state immunity in international private law was carried out. The authors highlighted different points of view on the legal characteristics of immunity. Supporters of the non-imperative and imperative point of view were singled out. Despite theoretical differences, it can be determined that the legislation of all states and international conventions recognize immunity as a key principle. Also, the authors considered types of immunity, such as judicial immunity, immunity from preliminary enforcement of a claim and immunity from enforcement of court decisions. Each of these types of immunity was considered from the point of view of legal principles and practical aspects of their application.
The paper emphasizes the importance of the state and its responsibility for actions within the framework of international legal relations on a par with other subjects of international private law.
The state and problems of development of domestic start-ups in international markets during the war
Authors: ADAMIV Marta , OKUNSKA Sofiia
Published: March 2024

Introduction. Start-ups are one of the accelerators of developing the innovation potential of the modern economy. In the problematic socio-economic conditions created by a full-scale war, start-ups can respond flexibly and quickly to the critical needs of society. Ukrainian start-ups have been actively developing in domestic and foreign markets in recent years. However, the full-scale invasion also created several problems for its functioning. It is worth noting that amid the war, the entry of Ukrainian start-ups into international markets allows them to diversify existing risks and creates additional development opportunities. We are discussing increasing market share, product and geographical diversification, additional export earnings, gaining experience abroad, attracting foreign investment, etc.
The purpose of the paper is to identify and study the state and critical problems of the development of start-ups when entering international markets, taking into account the impact of full-scale war.
Results. The study found that under the current war conditions, Ukrainian start-ups have been forced to expand their activities to international markets to diversify risks and increase investment attractiveness. At the same time, the full-scale invasion has created new challenges and problems for the development of Ukrainian start-ups at home and abroad. Thus, the study identified the main problems of entering and operating start-ups in international markets: the formation and functioning of a start-up team, attracting start-up financing, adapting to the regulatory framework for start-ups abroad, cultural and linguistic differences, and adapting products or services to a foreign market. It is worth noting that one of the main problems caused by the war was the reduction in investment in domestic start-ups.
Conclusions. Thus, an important task today at various levels is ensuring start-ups' progressive development based on practical solutions to existing problems. After all, Ukrainian start-ups have great potential and can succeed internationally with the proper government support and competent management.
Utilization of blockchain technologies in accounting and auditing: analysis of innovative possibilities in the context of digital transformation
Authors: IVANOVA Nataliia , MILMAN Leonid , SAKUN Alina
Published: March 2024

Introduction. As organizations undergo digital transformation, the field of accounting and auditing is experiencing substantial changes. The potential of integrating blockchain technologies into accounting and auditing practices has been explored to identify innovative opportunities arising within the context of the ongoing digital revolution.
The purpose of the paper is to analyze the innovative possibilities of utilizing blockchain technologies in accounting and auditing amidst the digital transformation.
Results. The concept of blockchain technologies has emerged as a revolutionary and transformative force in the realm of digital innovations. Essentially, blockchain is a decentralized and distributed ledger technology that securely and transparently records transactions across a network of computers. This innovative approach to data management has the potential to reshape various industries, offering numerous advantages such as enhanced security, transparency, and efficiency. Analysis indicates that blockchain technologies present numerous innovative opportunities in the field of accounting and auditing. Immutable ledgers, smart contracts, and decentralized consensus mechanisms form the basis for improved data accuracy, fraud prevention, and real-time financial reporting. Furthermore, blockchain's capacity to streamline reconciliation processes and facilitate seamless information exchange among stakeholders provides significant advantages for both accountants and auditors.
Conclusions. Blockchain technologies offer innovative opportunities for a revolutionary transformation of accounting and auditing practices in the era of digital transformation. The decentralized and transparent nature of blockchain enhances the reliability and efficiency of financial record-keeping, while smart contracts automate routine processes. While organizations grapple with implementation and regulatory challenges, the potential benefits of blockchain in accounting and auditing signal a shift in paradigm towards a more secure, efficient, and reliable financial ecosystem. As organizations navigate the digital transformation landscape, the adoption of blockchain in accounting and auditing practices becomes a strategic imperative to ensure financial integrity and transparency in the modern era.
The impact of artificial intelligence on the labor market in the world and particularly in Ukraine
Authors: ROSSOMAKHA Iryna , KYRYLENKO Oksana , BORYSIUK Anton
Published: March 2024

Introduction. In the contemporary context of global environmental, economic, and epidemiological challenges, the study of artificial intelligence (AI) and its impact on the labor market is crucial.
The purpose of this paper is to study the impact of artificial intelligence on the labor market in the world and particularly in Ukraine.
The results of the research highlight a global trend of job displacement due to technological advancements, particularly in robotics and AI. The study defines AI and highlights its potential in tasks requiring human intelligence. A McKinsey Global Institute study suggests up to 300 million jobs could be lost globally by 2030, emphasizing concerns about employment stability. The paper explores industry-specific data, identifying high-risk areas like routine tasks for automation and less susceptible roles requiring creativity. The impact on the labor market is nuanced, with most jobs only partially automated, offering opportunities for complementation. Positive aspects of AI, such as creating new employment opportunities and enhancing worker safety, are underscored. Governments and businesses are urged to proactively retrain workers at risk of automation. The potential for job reduction in Ukraine is discussed, emphasizing the need for education reform.
Conclusion. The multifaceted impact of AI on employment necessitates careful planning and consideration. For Ukraine, the focus should be on creating competitive AI specialists through specialized education, international collaboration, and skills development, enabling the country to navigate the evolving global environment.
Online Learning and Its Effects on Students’ Writing Skills
Authors: Alhatim Odeh Sahmi , Elgoudman Khatmeh Suleiman , Almughays Athra  Fahad  Ali
Published: March 2024

As a side effect of the emergency transition to remote online learning, all schools’ students and universities have stopped teaching in classroom settings in mid-March 2020 and began using internet platforms to deliver online learning activities. Teachers and students communicate through chat, video calls, or emails. The government also launched educational television programming as an alternative for students who do not have access to the internet. Online learning is becoming more popular. However, there are problems with students' perseverance and achievement. Many learners can't study well in difficult situations like a pandemic. So, we need to think about learning strategies that give all students chances to achieve specific goals when they're studying at home. Writing in a foreign language is hard. This study looks at how online self-learning helps students. It checks their writing and they adjust their learning. They learn to write better. The aim of this study is to show how online learning enhances writing skills.
Effectiveness of One-way and Two-way Tasks in ESP Writing Courses
Authors: Banaruee Hassan
Published: March 2024

The aim of this study was to investigate the effectiveness of one-way and two-way tasks in improving the ability of learners to write about subjects in Economics. To achieve this objective, 32 undergraduate students of Economics were selected for this study. They were divided into two groups, each one consisting of 16 participants. These groups attended two separate ESP writing courses. While the first group was treated by one-way tasks of writing, the second group was treated by two-way tasks. A pretest and a posttest of ESP writing were administered. Scores of participants were analyzed by two paired and two unpaired t-tests. Results obtained by these tests showed that both one-way and two-way tasks were effective in improving ESP writing ability of language learners. However, the effectiveness of two-way tasks was significantly higher than the effectiveness of one-way tasks. The direct role of all participants in the writing of final product is suggested to be one of the main possible reasons behind the effectiveness of two-way tasks. This is the main feature that distinguishes two-way tasks from one-way tasks and makes them superior to one-way tasks for improving writing ability of language learners.
Using Convolutional Neural Network to Design and Predict the Forces and Kinematic Performance and External Rotation Moment of the Hip Joint in the Pelvis
Authors: Masoud Ghoreishi Mokri Seyed , Valadbeygi Newsha , G. Stelnikova Irina
Published: March 2024

In order to improve the dynamic and kinematic adaptability of the hip joint, this paper presented a control attitude and kinematics and torque of the hip joint with power based neural network control. The CNN neural network uses input data only from the limb designed by the medical software, and is trained by different natural and artificially altered step patterns of healthy individuals. This type of network has been used for deep learning to realize adaptive speed control, dynamic and motion attitude, as well as prediction of force and torque performance. Detailed movement and torque tests were performed using MIMICS and ANATOMY AND PHYSIOLOGY software, and the obtained data were checked and varied by a healthy person, and finally, the test results showed that the neural network control system was able to control the selection. It has a variable and high speed with proper adaptation in various conditions. Finally, MATLAB software was used to design and predict the data of the problem, and favorable results were obtained.
Aarogya Margdarsh- Medical Camp Related Mobile App
Authors: Teja Mallareddy Charan , Lakshmi K. S. Vijaya , Kumar Pathuri Vinay , Teja Garike Tarun
Published: March 2024

In few Rural Areas, people don’t have access to the better medical treatment for the diseases and most of the people can’t afford to get treatment in private hospitals. Even though several free Medical Camps are being conducted, most of the people are unaware of these Medical Camps’ Venues and timings. So, many people are ending up without utilizing the resources. To Overcome this problem, this EPICS Project proposes a novel, a Mobile Application called “Aarogya Margdarsh”, which provides an interface between patients and medical camp organizers and provides the information about the Free Medical Camps provided by Hospitals, Medical Colleges, NGOs etc. The project is divided into various modules like database collection, message alerts. The details of date, time and venues of free Medical Camps organized by all these Organizations is collected and it is provided to the users through the Mobile Application. The App satisfies the user in such a way that the user gets the detailed information about Medical Camps well in advance. This is also useful to Medical Camp organizers such that their humanitarian efforts will be well utilized by patients.
Identifying Flood Prediction using Machine Learning Techniques
Authors: Helen Joyice Mamidisetti. , Valli Sri Vidya Katta. , Vijaya Lakshmi Lankalapalli. , Juilath Murala. , Prajwala Ketha. , Srinu Vasarao P.
Published: March 2024

Flood is the most devastating and destructive that can destroy everything on land. These floods will cause further flooding in affected areas. Flood prediction models are being researched to reduce risk, think strategically, reduce human life and reduce property damage from floods. Over the last two years, AI techniques have improved the forecasting process, resulting in better execution and financial planning stability. First of all, these events can take everyone's feelings into account. Artificial intelligence models for flood prediction are crucial for flood warning, flood mitigation or prediction. Machine learning programs have become ubiquitous due to their computational needs for limited information. We believe that collecting only a small amount of data can help representative vector, best scores. The selected tree was successful due to better than expected accuracy and best score. Machine learning algorithms used in this flood prediction are decision trees, logistic regression, etc. For evaluation and comparison. Logistic regression can provide more accurate results than other algorithms and provide high efficiency and improvement. Floods are perhaps the most destructive event in the world, can cause irreversible damage and cause great suffering to humanity. Generally, most farmers are the most disturbed people in the world because their hard work can suddenly fail, causing their hearts to become melancholy. To measure water level and velocity over a large area, it is important to provide an exposure model that includes safety. These models can be aimed to improve the prediction by using different methods. Additionally, these models provide accurate predictions of flood events in a year, but do not provide much understanding and detail of the options needed.
Language tells another story: when tobacco is
cistemaw
and the Cree are nêhiyaw
Authors: Carson James Taylor
Published: March 2024

Indigenous peoples’ trade in so-called ‘contraband’ tobacco, as a spate of recent cases in Alberta has shown, causes conflict between Indigenous peoples’ culture, history and sovereignty and federal and provincial laws. And as long as tobacco is defined solely as ‘tobacco’, the illegal trade will remain a criminal matter. But if we ask how First Peoples have named the plant and how such naming connects the plant to their lives and identities, today and in the past, we can locate a new way of thinking that allows the telling of a different story, one that pushes back against the settler state’s encroachments, arrests and indictments, to enable a new view of a present-day practice situated within the continuity of centuries of custom and practice.
A royal visit revisited: Mackenzie King and the British royal visit to the USA, June 1939
Authors: McCulloch Tony
Published: March 2024

In June 1939 King George VI and Queen Elizabeth were on a tour of Canada that included a brief visit to the United States. The timing of this visit proved to be fortuitous from the British point of view as it came soon after the controversial Munich agreement in September 1938, which ceded the Czech Sudetenland to Germany, and the subsequent occupation of the remainder of the Czech state by German troops in March 1939 – both of which had damaged Britain’s image in America. The royal visit to the USA was a great public-relations success, as was the visit to Canada, and its significance for relations between Britain, Canada, and the United States has been discussed by a number of historians from all three countries. However, very little attention has been paid to the key role of the Canadian prime minister, William Lyon Mackenzie King, regarding the American phase of the royal visit. Indeed, a recent film about the Royal Visit and the weekend spent by the king and queen at President Franklin Roosevelt’s family home in upstate New York omitted any mention of Mackenzie King, despite the fact that he was their official escort. This article seeks to fill this gap by assessing Mackenzie King’s involvement in the origins and conduct of the royal visit. It also reflects upon what the royal visit reveals about Canada’s relations with Britain and the United States on the eve of the war and, in particular, Mackenzie King’s relationship with President Franklin Roosevelt and his contribution to the Anglo-American ‘special relationship’.
Stochastic Wave Dark Matter with Fermi-LAT γ-Ray Pulsar Timing Array
Authors: Luu Hoang Nhan , Liu Tao , Ren Jing , Broadhurst Tom , Yang Ruizhi , Wang Jie-Shuang , Xie Zhen
Published: March 2024

Pulsar timing arrays (PTAs) can detect disturbances in the fabric of spacetime on a galactic scale by monitoring the arrival time of pulses from millisecond pulsars (MSPs). Recent advancements have enabled the use of γ-ray radiation emitted by MSPs, in addition to radio waves, for PTA experiments. Wave dark matter (DM), a prominent class of DM candidates, can be detected with PTAs due to its periodic perturbations of the spacetime metric. In response to this development, we perform in this Letter a first analysis of applying the γ-ray PTA to detect the ultralight axion-like wave DM, with the data of Fermi Large Area Telescope (Fermi-LAT). Despite its much smaller collecting area, the Fermi-LAT γ-ray PTA demonstrates a promising sensitivity potential. We show that the upper limits not far from those of the dedicated radio-PTA projects can be achieved. Moreover, we initiate a cross-correlation analysis using the data of two Fermi-LAT pulsars. The cross-correlation of phases, while carrying key information on the source of the spacetime perturbations, has been ignored in the existing data analyses for the wave DM detection with PTAs. Our analysis indicates that taking this information into account can improve the sensitivity to wave DM by ≳50% at masses below 10−23 eV.
Upper mesophotic reef fish assemblages at Bahía de Banderas, Mexico
Authors: Arreola Jose Luis , Galván-Villa Cristian , Perfecto-Avalos Yocanxóchitl , Rodríguez-Zaragoza Fabian , Rios Jara Eduardo
Published: March 2024

There is no information on the species associated with the mesophotic reefs of Banderas Bay, located in the central Mexican Pacific. This study analysed the reef fish assemblage from three depths (50, 60 and 70 m) in three sampling sites of the southern submarine canyon of the Bay: Los Arcos, Bajo de Emirio and Majahuitas. Several analyses were performed to test the hypothesis that there are important differences in fish abundance and species composition between sites and depths. Twenty-two species of bony fishes grouped in 14 families were recorded. PERMANOVA results showed that there were no significant differences in fish diversity parameters between sites, indicating a certain uniformity in their distribution. However, nine species were exclusive to one site and depth (five singleton species with only one individual recorded and four unique species recorded only once). On the other hand, there were significant differences between depths, mainly between 50 and 70 m. Diversity decreases with depth and species composition changes. SIMPER, Shade Plot and NMDS analysis show the most representative species at each depth, with at least half of the species (11) recorded only at 50 m and four species at the deeper levels (60 - 70 m). The observed assemblage includes several of the most caught species in the shallow water artisanal fishery, which is the most traditional and common type of fishery in the Bay. In addition, the Pomacanthus zonipectus (Cortés angelfish) is of particular interest, as it has a special protection status in the official Mexican standard (NOM-059-SEMARNAT, 2010) due to its use as an ornamental species in aquaria. We hypothesised that the mesophotic zone may serve as a refuge for these fishes, so we propose that the information obtained is an important basis for new research aimed at the sustainable management of fisheries in the area.
New records of Chrysochroinae Laporte de Castelnau, 1835 (Coleoptera, Buprestidae) from China
Authors: Ai Hong-Mu , Qi Zhi-Hao , Su Rong-Xiang , Liao Zhi-Yu , Song Hai-Tian
Published: March 2024

Chrysochroinae Laporte de Castelnau, 1835 is the very colourful subfamily of Buprestidae. There are 127 species and subspecies of the subfamily which have been recorded in China.

In this paper, we reported three genera, two subgenera and five species of the subfamily Chrysochroinae Laporte de Castelnau, 1835 (Coleoptera, Buprestidae) which are all newly recorded from China. These reported taxa belong to two tribes and four genera: Chrysochroa (Chroodema) corbetti (Kerremans, 1893), Chrysochroa (Pyranthe) fulgens ephippigera White, 1843, Demochroa (Demoxantha) gratiosa indica Csiki, 1900, Xanthocata bonvouloirii (Deyrolle, 1861) (all the above four being Chrysochroini) and Cardiaspis mouhotii E. Saunders, 1866 (Dicercini). The five newly-recorded species are briefly described, illustrated and supplemented with relevant biological information.
A new species of mud snake (Squamata: Homalopsidae: Myrrophis) from southern Vietnam
Authors: Nguyen Sang Ngoc , Le Manh Van , Lathrop Amy , Vo Thi-Dieu-Hien , Murphy Robert W. , Che Jing
Published: March 2024

Abstract

Homalopsid snakes of the genus Myrrophis include only two species distributed in southern China and northern Vietnam. Here, we describe a third species from southern Vietnam based on morphological data and nucleotide sequences from the mitochondrial gene cyt b. Myrrophis dakkrongensissp. nov. is diagnosed by the following morphological characters: Medium-sized mud snake (largest total length 452 mm); internasal single and distinctly separated from loreals; dorsal scales smooth, in 23 rows at midbody, reduced to 19 or 20 rows before vent; ventrals 133–138; subcaudals 34–42, paired; cloacal plate divided; supralabials 8, fourth entering orbit; second pair of chin-shields small and oblique; maxillary teeth 17 or 18; gland-like tubercles present in the cloacal region; hemipenis short, forked and spinose, reaching 7th subcaudal; dorsum dark brown to black; and a white or yellow to orange lateroventral stripe present. The new species differs from its congeners by an uncorrected p distance in cyt b sequences of at least 10.5%.
L’AfD au sein de l’extrême droite allemande : sa position et son positionnement
Authors: Danckaert François
Published: March 2024

L’analyse et la comparaison des candidatures et des résultats de l’AfD et des autres partis d’extrême droite en Allemagne aux dernières élections législatives et européennes et lors de la dernière vague d’élections aux parlements des Länder montrent que l’AfD jouit d’une position quasiment monopolistique au sein de l’extrême droite parlementaire allemande. Associée à l’examen du profil et de l’histoire de ces formations, la même analyse, appliquée cette fois aux onze dernières années de la vie politique allemande, révèle que cette situation n’est pas principalement le résultat de la concurrence de l’AfD à partir de 2013. L’AfD tente de contester son propre extrémisme et de se démarquer de ces autres formations en renvoyant à sa « liste d’incompatibilité », mais les débats relatifs à celle-ci au sein de l’AfD et la collaboration de cadres du parti avec d’autres organisations, en particulier en dehors des partis, font apparaître clairement l’ouverture de l’AfD envers le reste de l’extrême droite allemande.
L’alternative pour l’Allemagne (AfD) et la question migratoire
Authors: Sebaux Gwénola
Published: March 2024

L’enjeu migratoire de plus en plus prégnant en Europe et en Allemagne concourt très fortement à l’essor électoral de l’AfD, qui fête en 2024 ses onze ans d’existence. Cet article analyse l’agenda migratoire de la formation politique nationaliste et identitaire en le mettant en perspective avec la politique migratoire progressiste de la coalition de centre-gauche d’Olaf Scholz. La rhétorique d’extrême droite, de plus en plus audible dans l’espace public, impacte-t-elle finalement la gouvernance migratoire de la coalition tripartite ? En quoi l’AfD concourt-il à accentuer les lignes de fracture qui se creusent dans la société allemande ? L’analyse à travers le prisme de la question migratoire révèle une inquiétante rupture de l’équilibre démocratique allemand.
Derrière l’information sur l’AfD, une stratégie des médias français ?
Authors: Herbet Dominique
Published: March 2024

Au croisement des sciences politiques et des médias, l’étude constate la forte récurrence dans les médias d’articles traitant de la montée des populismes de droite et de gauche en Europe et dans le monde, notamment dans la perspective des grands scrutins électoraux telles les élections européennes de juin 2024. Dans les médias français, de nombreux reportages sont consacrés à l’AfD, le parti d’extrême droite allemand. Peut-on alors parler d’une stratégie ciblée de ces médias qui constituerait une information en miroir par rapport au Rassemblement national en France dont l’entreprise de normalisation et la progression dans les sondages inquiètent. Dans un premier temps l’étude vise à situer ces partis dits populistes et s’articule ensuite autour d’une mise en perspective entre AfD et RN, puis entre droite extrême et droite conservatrice, interrogeant les notions de « Plafond de verre », « Front républicain » ou dé-crédibilisation par l’intégration, avant d’aborder des questions plus ponctuelles comme la convergence entre extrême droite et extrême gauche sur la Russie ou les stratégie et prospective dans la perspective des élections européennes.
Yoram Hazony, l’éminence grise
Authors: Confavreux Joseph
Published: March 2024

Il entend peser sur l’élection présidentielle étatsunienne à travers son activisme politique et intellectuel destiné à forger une doctrine pour le trumpisme. Il a été le pionnier d’une alliance alors souterraine entre les suprématistes juifs et Benyamin Netanyahou. Giorgia Meloni a promis de faire résonner sa pensée dans toute l’Italie. Viktor Orban en fait un des inspirateurs de sa «  démocratie illibérale  ». Nationalisme, religion, propriété privée, frontières, liens du sang et exclusion de l’autre… Yoram Hazoni, l’auteur du best-seller Les Vertus du nationalisme , se démultiplie sous toutes les latitudes pour chanter les louanges de son «  conservatisme national  », une reconfiguration à peine voilée de la pensée de Charles Maurras.
Antoine Meillet, Marcel Cohen et la sociologie du langage
Authors: Bergounioux Gabriel
Published: March 2024

Prenant ses distances avec la psychologie et les courants culturalistes, Meillet a fait le choix de rejoindre l’équipe de l’ Année sociologique de Durkheim de 1905 à 1912. Après la Première Guerre mondiale, il a concentré son attention sur la géographie des langues, leurs antagonismes et leur institutionnalisation plutôt que sur leur stratification interne. À l’inverse, quand son élève Cohen a repris la question dans une perspective marxiste, il a cherché quelles variations résulteraient d’une division en classes sans mettre à l’épreuve sa théorie par un travail d’enquête sur le français. Ses propositions ne se sont imposées ni en France ni à l’international.
Meillet et les « langues de civilisation »
Authors: Joseph John E.
Published: March 2024

Les ouvrages de Meillet sont marqués par un chauvinisme national et social que nous, ses commentateurs, tendons à excuser au motif qu’il était typique de son époque. Mais pas tous ses contemporains ont utilisé des termes tels que « langues de civilisation » et « petites langues » qui figurent tout au long de l’œuvre meilletienne. Cet article examine ses vues sur la nécessité d’une consolidation linguistique en Europe comme partie du processus de civilisation pour sauvegarder la paix dans le contexte de sa linguistique « humaniste » qui refusait de séparer les langues de leurs locuteurs. Une telle séparation qui se trouve chez beaucoup de linguistes de l’époque aurait pu éviter ce qui semble aujourd’hui inacceptable dans son travail ; mais il faut lui accorder le mérite d’avoir osé maintenir la langue dans la sphère de la vie humaine.
La dualité faillir/falloir à l’aune de la grammaticalisation et du changement de sens selon Meillet : complexité, rupture, affaiblissement du sens
Authors: Gandon Francis
Published: March 2024

L’auteur s’intéresse à la théorie de la grammaticalisation, développée par Meillet et universellement connue. Gandon rappelle les paroles de Meillet qui voit dans la constitution de formes grammaticales nouvelles les résultats d’« un affaiblissement de la prononciation, de la signification concrète des mots et de leur valeur expressive ». Par la suite, il aborde le problème posé en français par le duo faillir/falloir , dérivé de la même famille indo-européenne, afin de le confronter aux idées de Meillet. Quelques faits que l’auteur présente ne correspondent pas à la théorie de Meillet. Il en découle que Meillet, tout brillant qu’il était, semblait parfois manquer de précision dans ses explications.
L’école de Meillet et l’anthropologie
Authors: Loicq Jean
Published: March 2024

Meillet s’est toujours considéré comme linguiste uniquement. Mais ses relations avec l’école de Durkheim-Mauss l’ont rapidement conduit à envisager le changement linguistique comme « fait social ». Il était aussi essentiellement comparatiste, et c’est en cette qualité qu’il a soutenu les premiers essais de Dumézil tendant à renouveler l’ancienne mythologie comparée. Entre-temps, son élève et collaborateur Vendryes a mis en évidence les traces de traditions religieuses et culturelles indo-européennes dans les langues indo-iraniennes, italiques et celtiques. Peu après, Meillet y repérait, comme en Grèce, des débris d’anciennes traditions littéraires, bases solides de l’anthropologie dumézilienne. Dans son dernier livre, Benveniste, successeur de Meillet, a révélé avec sa connaissance des mentalités archaïques, moyennant l’analyse étymologique, le substrat mental du vocabulaire social indo-européen.
Éducation à et évaluation : comparaison d’approches en arts et en sciences
Authors: Chatelain Sabine , Hoznour Pia-Ingrid , Didier John
Published: March 2024

L’« éducation à » s’inscrit dans une problématique d’interdisciplinarité, ayant pour but de développer des compétences des futurs citoyens. En Suisse, les plans d’études de l’école obligatoire ont intégré des éléments d’« éducation à » dans le volet Formation générale. Les élèves sont ainsi amenés à développer des compétences transversales tout en mobilisant des savoirs disciplinaires dans une démarche de projet. Toutefois, l’évaluation de ces compétences, moins en lien avec des savoirs disciplinaires évalués habituellement, pose des problèmes aux enseignants. Des recherches récentes sur l’« éducation à » ont montré d’une part l’utilité des balises curriculaires (Barthes et al., 2019) et d’autre part la difficulté de l’élaboration de critères ayant trait à l’implication de la personne au cours d’un processus créatif (Pellaud et al., 2019). En partant d’une réflexion sur des démarches spécifiques dans des disciplines potentiellement impliquées dans l’« éducation à » (sciences de la nature, arts), nous nous intéressons à l’apport des modèles déjà utilisés en formation pour soutenir des démarches d’évaluation qui tiennent compte de l’implication de la personne au cours du process d’apprentissage. Nous proposons de comparer la démarche scientifique (Cariou, 2015), le modèle des 3P pour évaluer des apprentissages en créativité (processus, produit et propos, Mastracci, 2012) et le modèle plus général de l’alignement curriculaire (Pasquini, 2021). Suite à notre analyse comparative, nous soutenons que la séparation entre l’évaluation des savoirs disciplinaires et des compétences transversales pourrait être dépassée en tenant compte des dimensions du processus créatif (personne, processus et produit). Finalement, nous tirerons des conclusions pour la formation des enseignants en vue de l’« éducation à ».
Des “éducations à” aux problèmes pernicieux : repères pour une éducation au politique à l’école.
Authors: Chauvigné Céline , Fabre Michel
Published: March 2024

Cet article traite de l’enseignement des Questions Socialement Vives (QSV) à l’école, dans le cadre des « Éducations à ». Parmi les travaux concernant la prise en charge des QSV avec des dispositifs tels que le débat argumentatif, les cartes de controverses, les jeux de rôles, etc., l’originalité de notre travail consiste en trois points : 1) les QSV dont nous traitons sontpensées, dans le cadre de la tradition américaine du management politique, comme des problèmes dits « pernicieux » ; 2) par rapport à des travaux privilégiant une approche cognitive et des dispositifs axés sur les processus psycho-sociologiques de traitement des problèmes (Design thinking et autres), notre approche est commandée par l’analyse épistémologique des problèmes en jeu, dans une démarche didactique; 3) ces deux choix nous permettent de formuler des critères précis d’évaluation des acquis des élèves par rapport à la compréhension de tels problèmes. Nous proposons ici, sur la question de l’usage du glyphosate, des repères épistémologiques pour une prise en charge didactique de cette QSV dans l’enseignement secondaire.