bluuebunny/crossref_metadata_2025 huggingface dataset:
Some Aspects on a Special Type of $(\alpha,\beta )$-metric
Authors: Pıscoran Laurian-loan , Barbu Cătălin
Published: April 2023

The aim of this paper is twofold. Firstly, we will investigate the link between the condition for the functions $\phi(s)$ from $(\alpha, \beta)$-metrics of Douglas type to be self-concordant and k-self concordant, and the other objective of the paper will be to continue to investigate the recently new introduced $(\alpha, \beta)$-metric ([17]):
$$
F(\alpha,\beta)=\frac{\beta^{2}}{\alpha}+\beta+a \alpha
$$
where $\alpha=\sqrt{a_{ij}y^{i}y^{j}}$ is a Riemannian metric; $\beta=b_{i}y^{i}$ is a 1-form, and $a\in \left(\frac{1}{4},+\infty\right)$ is a real positive scalar. This kind of metric can be expressed as follows: $F(\alpha,\beta)=\alpha\cdot \phi(s)$, where $\phi(s)=s^{2}+s+a$.
In this paper we will study some important results in respect with the above mentioned $(\alpha, \beta)$-metric such as: the Kropina change for this metric, the Main Scalar for this metric and also we will analyze how the condition to be self-concordant and k-self-concordant for the function $\phi(s)$, can be linked with the condition for the metric $F$ to be of Douglas type.

self-concordant functions, Kropina change, main scalar.
Coordinates of the Midpoint of a Segment in an Extended Hyperbolic Space
Authors: Romakina Lyudmila N.
Published: April 2023

In this article, we find an analytical characteristic of the type of a line and derive the formulae for calculating the coordinates of the midpoints and quasi-midpoints of elliptic, hyperbolic, and parabolic segments in an extended hyperbolic space $H^3$ in the frame of the first type. The space $H^3$ we consider in the Cayley\,--\,Klein projective model as a projective three-dimensional space with an oval quadric $\gamma$ fixed in it.
ALEXANDER SCRIABIN’S TRADITIONS IN RUSSIAN PIANO ART OF THE FIRST HALF OF THE XX CENTURY
Authors: BORODIN BORIS
Published: April 2023

The article provides a brief overview of the traditions of A. N. Scriabin in Russian piano performance in the first half of the 20th century. The art of Scriabin as a pianist is characterized, which is considered as a natural continuation of his composer's work. It is noted that throughout his creative career, two invariable properties are visible in his performing activity: the highest sound mastery and improvisational performance. Scriabin as a performer becomes the prototype of a special pianistic role - a “scriabinist” - a musician with the finest spiritual organization, with a rich sound palette and a peculiar, aristocratic pianism. The similarity of this role with such an original phenomenon of the fin de siècle era as a “neurasthenic actor” is substantiated. The main personalities who continued the performing traditions of Scriabin in the first half of the 20th century are considered to be Vsevolod Buyukli, Konstantin Igumnov, Alexander Goldenweiser, Samuil Feinberg, Vladimir Sofronitsky, Heinrich Neuhaus.
Investigación Cualitativa en Educación
Authors: Quispe-Morales Rolando Alfredo
Published: April 2023

En el campo de la investigación educativa, existen diversas formas de aproximarse a la realidad educativa, que puede ser abordada desde el paradigma cuantitativo, cualitativo o sociocrítico. La postura que se adopte orientará el proceso de investigación, debido a que cada paradigma de investigación presenta su propio procedimiento. Comprender este aspecto es fundamental en el desarrollo de la investigación, puesto que cada paradigma se sustenta en una orientación epistemológica, ontológica y metodológica; por eso, no es adecuado mezclar métodos y paradigmas. En el interés de contribuir a la comprensión metodológica de la investigación cualitativa, en el texto, se presenta el proceso metodológico de los dos métodos más utilizados en el campo de la investigación cualitativa en la educación: la investigación acción educativa y la investigación etnográfica educativa. En el primer caso, se deja en claro que la investigación acción educativa es un proceso en que se involucra a los profesionales de la educación en todas las etapas del proceso de investigación, desde la identificación del problema hasta la implementación y evaluación de las soluciones; esta metodología se centra en el cambio práctico y en la mejora de la calidad de la educación, y se basa en la idea de que la reflexión crítica y la acción colaborativa son esenciales para el éxito de cualquier iniciativa de mejora educativa. En el segundo caso, se establece que la etnografía educativa es una metodología de investigación cualitativa que se utiliza para analizar y comprender la cultura y la vida cotidiana en el ámbito educativo; esta permite obtener una comprensión profunda de las prácticas y las relaciones sociales en el contexto educativo, y utilizar esta información para mejorar la práctica educativa y promover la equidad en la educación.
LEGAL CHRONICLE
Authors: Evseev Alexander P. , Pleshanova Olga P. ,   Infralex Law Firm, Shmarko Irina K. ,   “Zakon” Journal
Published: April 2023

In the April legal chronicle, the authors comment on important events in the field of international, housing and procedural law: the issuance by the Pre-Trial Chamber II of the International Criminal Court of an arrest warrant for Russian President V. Putin and Children’s Ombudsman M. Lvova-Belova; decision of the Constitutional Court on the interpretation of Article 17 of the Housing Code and on the plans of the Supreme Court to abolish contractual jurisdiction in contracts with consumers.
On the Admissibility of Settlement Agreements Denying the Pre-procedural Set of Facts
Authors:   St. Petersburg State University, Schwarts Mikhail Z.
Published: April 2023

The article substantiates the need to distinguish settlement agreements of two types: agreements based on recognition by the parties of the pre-procedural set of facts alleged in the claim or objections to it, and settlement agreements concluded with a continuous denial by the parties of the facts alleged in the litigation documents. Settlement agreements of the first type have as their content the disposal of rights and obligations arising from the facts, directly or implicitly recognised by the parties by entering into this agreement, and can be checked for their compliance with the material law governing these rights and obligations. Settlement agreements of the second type cannot be checked for compliance with the material law, because their subject is exclusively a termination of a judicial dispute, without determining the fate of the disputed rights and obligations, since the existence of the latter is denied. Termination of the dispute should be recognised as an independent basis (causa) of property provision — the latter is committed by the parties to the settlement agreements of the second type solely as consideration for reaching a procedural compromise, and not in fulfilment of the obligations that have become the subject of the dispute.
Settlement Agreement under the Condition: The Discretion of the Parties or an Unfinished Conflict
Authors:   Voronezh State University, Porotikova Olga A.
Published: April 2023

The article examines the issues of the admissibility of concluding a settlement agreement under a suspensive or resolutive condition, as well as the impact of the occurrence or non-occurrence of such conditions on the fate of the settlement agreement and its enforcement. The author makes an attempt to assess the limits of the freedom of the contract when concluding a settlement agreement, taking into account its dualistic (civil law and procedural) nature. In particular, the problem of the correlation of the principle of free agreement of conditions in a settlement agreement as a civil law contract with its inherent procedural properties of a court decision — finality, certainty, enforceability is analysed. The author reveals the practical difficulties that arise with forcing the execution of settlement agreements, especially if the obligations for one party are defined under the condition, and for the other party they are formulated specifically and are subject to immediate implementation. The article draws attention to the impact of direct prohibitions to make certain transactions under the condition established by law, on the inclusion of elements of these transactions in settlement agreements.
Debt Restructuring: How to Protect the Interests of Independent Creditors?
Authors:   Saint-Petersburg State University, Esmanskiy Andrey A.
Published: April 2023

This article is devoted to the issues of taking into account the interests of the debtor’s minority creditors when approving rehabilitation procedures, both those regulated by the Bankruptcy Law and out-of-court agreements on restructuring. Author analyses the risks for creditors when concluding agreements on restructuring without their participation, as well as the problems of applying the rehabilitation privilege to creditors’ claims resulting from crisis financing. In addition, author considers the problem of coercing the minority by the majority when voting on conclusion of a settlement agreement in a bankruptcy case and analyses the case law of the Supreme Court and arbitration courts on disputes on the approval of settlements. A draft reform of the Bankruptcy Law is also considered in the context of expanding the practice of rehabilitation procedures and protecting the interests of minority creditors.
Non-Linear Control of Fuel Cell/Ultra-Capacitor Hybrid Electric Vehicle Using Comprehensive Function Algorithm Based on IDA-PBC
Authors: Naseh Majid Reza , Behdani Ali
Published: April 2023

Hybrid electric vehicles (HEVs) have become increasingly popular due to their high fuel economy performance and low greenhouse gas emissions. HEVs that use fuel cells produce fewer emissions and are more efficient than many other types of cars. Accordingly, many researchers are significantly interested in applying a combination of the fuel cell (FC) and the ultra-capacitor (UC) for HEVs. This study proposes a method for improving the control of an FC/UC hybrid electric vehicle, also analyzing its performance. In the HEV used, the fuel cell provides the main power, but in transient situations where the FC cannot support the vehicle alone, the UC gives the stored energy to the system to solve the energy deficiency. In this study, the interconnection and damping assignment passivity-based control (IDA-PBC) method is applied and regulates the system performance under nonlinear operation. In addition, a comprehensive energy management strategy proposes to cover all driving cycle situations. The main control objective is to keep the system voltage within an acceptable range despite the appropriate dynamic behavior. To increase the accuracy of the results, in system structure modeling, energy losses are considered. In the case study part, a standard Japanese driving cycle (SJDC) uses, which comprises different practical conditions such as off-load, overload, uphill, and downhill. The simulation results using MATLAB/Simulink show the effectiveness of the proposed algorithm and control method.
Dissipation, Residue Analysis, and Dietary Risk Assessment of Chlorantraniliprole and Indoxacarb in Rice
Authors: Zhou Yian , Bi Yingying , Han Lijun , Zhuang Ming , Song Shuangyu , Qin Fayi , Cao Mengyuan
Published: April 2023

A residue analytical method for the determination of chlorantraniliprole and indoxacarb in brown rice, rice husk, and rice straw was validated using a revised QuEChERS method coupled with high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS), and field trials were conducted in 12 regions to study the dissipation and final residues of the two pesticides in rice crop. In the method validation, chlorantraniliprole and indoxacarb had average recoveries ranging from 79% to 110%, with relative standard deviations (RSD) of 1.2% to 12.2%. The dissipation experiments showed that the half-lives of chlorantraniliprole in brown rice and rice husk were 12.4-29.8 and 4.6-11.2 d, respectively, whereas the dissipation half-lives of indoxacarb were 10.3-20.4 and 4.4-8.1 d, respectively. As for the final residues in the 12 regions, rice samples were collected on the 28 and 35 d after the last application. The maximum residues of chlorantraniliprole and indoxacarb in rice grain were 0.38 mg/kg and 0.080 mg/kg, respectively, and in brown rice, the maximum residues of chlorantraniliprole and indoxacarb were 0.028 mg/kg and 0.040 mg/kg, respectively. These values were all below the relevant Maximum Residue Limits (MRLs) in China. Using the final residue results and the food consumption data, the long-term dietary risk assessment indicated that the residues of these two pesticides in rice would not pose unacceptable dietary risk to the general population.
Design of a Vacuum Independent, Power Assisted Brake by Wire System using a Novel Electro-Magnetic Brake Booster
Authors: Pedapati Harsha Vardhan
Published: April 2023

With an increasing demand in the market towards electrical vehicles through technological advancements in the automotive field like, automated driving assistance that which have resulted in higher safety requirements and new innovations in the braking system, such as vacuum-independent, automated braking, and regenerative braking, play a crucial role in the vehicle's comfort and economics. However, the classic vacuum brake booster is no longer capable of meeting these requirements. A revolutionary Electro-Magnetic brake booster system is suggested in this research; this system is aimed to perform the function of boosting or enhancing the driver's pedal power despite remaining dependent on the vacuum source. Such an Electro-magnetic brake booster is mainly composed of an Electro-magnetic core plate, a ferromagnetic actuating plate and an ECU. It consumes electrical energy and converts into magnetic force to attract the metallic actuating plate, which is mechanically coupled to the pushrod of the master cylinder. However, the power required for braking (developing pressure in a master cylinder) is provided by the electrical power source. The core plate is associated with a pole as the electromagnet cores are mounted on one side of it. By incorporating a pedal pressure sensor linked to the ECU, which can control the electric power input to this core plate. Thus, the magnetic force developed is used in pulling the Actuating plate. In turn, it builds up the required pressure in the master cylinder. This novel Electro-Magnetic brake booster can be a better solution to satisfy the drawbacks of the existing brake boosters such as complexity in the structure and mechanism. Thus, this brake booster can be joined in substantial vehicles, autos and can be utilized as driver brake assistance for future Electric Vehicles by making a few upgrades in the ECU and the servo.
ARAI Indigenously Developed OCPP Server and OCPP Stack for EV Charging Station
Authors: U. Sreekumar  , A. Anand Deshpande  , B. Abhijit Mulay  , G. Parag Mengaji
Published: April 2023

Paper contains the work done on “ARAI indigenously developed OCPP server and OCPP stack for EV Charging station”. At present, India faces the challenge to locate, monitor and control the chargers situated at different locations, as there is no backend communication. We are experiencing shortage of conventionally generated power and fluctuation in the availability of power due to heavy load during the peak hours. To overcome this, all the chargers need to have backend communication so that the maximum charging rate of the chargers upon the availability of power in the grid can be controlled and monitored. OPEN Charge Point Protocol (OCPP) is a communication protocol that help the EV charging station to communicate with the central server and update the charging details along with the information like location the total unit consumed etc. The protocol also helps the Server to remotely monitor and control the EV charging station located even at remote location of the country. ARAI have indigenously developed OCPP server for the automotive industry which is being utilized to test and validate the OCPP compliance of the EV charger and server. ARAI server and stack supports the most recent version OCPP 2.0.
Performance Prediction, Optimisation and Validation of a CNG Engine Intake Manifold of a Commercial Vehicle Using Transient CFD Analysis
Authors: Geetesh Waghela  , Tushar A Patil  , Bhoopendra Tiwari  , Ashok Kumar Patidar
Published: April 2023

Developing countries like India have large consumer markets driven by huge demands. Commercial vehicles play a critical role in full filing these demands. Commercial vehicles increasingly face stringent emission norms criteria and hence designing an ICE-powertrain with optimum operating efficiency becomes paramount. Intake manifold is the critical part of an internal combustion engine that supplies fuel/ air mixture to all the cylinders combustion chambers. It ensures a uniform mixture at cylinder inlet for better mixing inside the cylinders for better volumetric efficiency. Uneven distribution of fuel/air mixture causes unstable torque and unburnt fuel which fails to meet the emission norms. It also results in uneven temperatures in each cylinder because of cylinder misfiring. In current paper, 3D Computational Fluid Dynamics (CFD) simulations are carried out to investigate the variance and uniformity of CNG/air mixture at the outlet of intake manifold. Commercial CFD tool Ansys Fluent is used to study the flow distribution of mixture inside the manifold and runners. Initial estimation of flow pattern is done by performing a steady state simulation to predict the uniformity index of CNG at cylinder inlet. For detailed investigation, transient simulation is performed by taking fresh air and CNG mass flow rate as a function of crank angle. In this paper, mesh dependence study was done initially to achieve an optimum cell count with good accuracy. A detailed transient analysis using multi-species modelling for air & CNG was done using automated scripts with time steps as small as 1 degree crank angle rotation coupled with injection pressure and injection timing study. This helped to identify critical areas and optimise the design to improve the mass flow rate variance from 15-20% for baseline case to 6-7% for final design, and also improve the uniformity index. It also helped reduce the CNG engine mis-firing issue. The results have been well validated with Laboratory Test Results.
Perceptions of organic practices among turfgrass professionals in Louisiana
Authors: Granberry Tyler , Lambert Matthew , Beasley Jeffery , Kuehny Jeff , Fultz Lisa , Rampold Shelli
Published: April 2023

Landscape contractors are increasingly interested in organic products for Louisiana’s residential and commercial turfgrass areas. However, the use, motivations, and barriers to adopting organic practices in the commercial turfgrass and landscape industry sector are not well documented. This study examined the perceptions of organic landscaping practices among members of the Louisiana Turfgrass Association. The study’s participants were primarily men aged 31 to 60, with six to 25 years of landscaping experience. Most turfgrass professionals were applying organic fertilizers and believed future organic product use would increase due to consumer demands and potential governmental regulation. Turfgrass professionals responded that they understood the USDA definition of organic but were less familiar with Organic Materials Review Institute (OMRI) labeling. Greater efficacy and access to organic products coupled with increased extension and educational efforts may increase Louisiana turfgrass professionals’ choices to adopt organic practices; however, more research is needed to better understand the adoption processes at play.
Desafíos de la innovación educativa en el proceso de aprendizaje.
Authors: Calderón Álvarez Carolina Stefanie
Published: April 2023

El presente trabajo de investigación tiene como objetivo, determinar cuáles son las principales necesidades relacionadas a la innovación educativa en el proceso de aprendizaje, las cuales han podido ser detectadas mediante la observación directa del fenómeno en las aulas de clase, de la Escuela de Educación Básica Fiscal "Dra. Isabel Ramírez Estrada" de la ciudad de Guayaquil. Esta problemática fue analizada conjuntamente con el aporte teórico de diversos autores que tratan de manera directa o indirecta las variables de investigación. Se aplicó una metodología cualitativa y cuantitativa, así como instrumentos de recolección de datos basados en encuestas estructuradas a una muestra de 120 estudiantes de educación general básica y entrevistas dirigidas a 19 docentes de la referida institución. Dentro de los principales resultados, se pudo determinar la necesidad e importancia de innovar en materia educativa, la misma que debe ser de carácter interdisciplinario y con apoyo de la comunidad educativa; el proceso de innovación evidenció que, para obtener resultados positivos en el aprendizaje, previamente se debe identificar cuáles son las principales necesidades que deben superarse al interior del aula de clases, por ejemplo: la elaboración y ejecución de estrategias metodológicas, uso de herramientas lúdicas, tecnológicas, entre otras.
Prácticas incorrectas de las tecnologías y los niveles de dislexia
Authors: Calderón Álvarez Carolina Stefanie
Published: April 2023

El presente trabajo de investigación tiene como objetivo, establecer si existe una relación directa entre el incorrecto uso de las tecnologías y los niveles de dislexia en educación primaria, las cuales se detectaron en tres instituciones educativas de la ciudad de Guayaquil- Ecuador, con una muestra poblacional,  divididos en dos subgrupos: 160 estudiantes y 30 docentes de cuarto grado de educación primaria y el otro grupo conformado por 180 estudiantes y 40 docentes de bachillerato, dando un total de 410 involucrados. El diseño de la investigación, fue de tipo cualitativo y cuantitativo, mientras que el método para la investigación, fue de tipo descriptivo y fenomenológico. Al ser cuantitativo, se pudo determinar el nivel de dislexia, el tiempo que emplean los estudiantes, para usar la tecnología como una herramienta educativa o de entretenimiento. Se aplicó una encuesta estructurada, dirigida a docentes y estudiantes de bachillerato, y test de observación directa para los estudiantes de cuarto grado. Se pudo determinar que el uso de las tecnologías, si no son enfocadas adecuadamente, pueden llegar a formar una serie de dificultades relacionadas al proceso lingüístico y fonológico, generalmente por la incorrecta pronunciación y reconocimiento silábico.
Uso de Herramientas Tic para fortalecer el aprendizaje en grado Preescolar en la Zona Rural de Boyacá, Colombia
Authors: Sandoval Vargas Yeni Consuelo
Published: April 2023

En las instituciones educativas rurales existen marcadas diferencias de infraestructura, conectividad, dotación y calidad de los equipos, frente a colegios del sector urbano, Situación que pone en desventaja a los niños y niñas de esta población, para quienes la utilización de las herramientas TIC se vuelve una carencia manifiesta.

El proyecto, una propuesta para aprovechar el uso de las TIC, como herramienta didáctica y pedagógica, contribuye a potenciar el desarrollo de diferentes habilidades y competencias cognitivas y psicomotrices en niños de grado preescolar, de una Institución Educativa del sector rural. La autora propone el uso del Software libre, ya que no demanda un alto costo económico, puede adaptarse a los equipos existentes en la IE -Computadores y tabletas-; se ajustan a los contenidos temáticos y a los aprendizajes propuestos para este grado; se pueden instalar de manera local, sin necesidad de Internet - es una limitante en el sector rural-; y  ofrecen gran variedad de actividades, juegos y pasatiempos que ayudan a potenciar el desarrollo de habilidades y competencias específicas, teniendo en cuenta sus características didácticas y de interacción. El estudio se desarrolló en el año 2020, con una metodología Investigación Acción, donde, para recolección de la información, se utilizaron diferentes instrumentos como: la observación participante directa e indirecta, la aplicación de entrevistas, el grupo focal, las encuestas, registros fotográficos y videos.
ANALYSIS OF WATER QUALITY THROUGH PHYSICO – CHEMICAL PARAMETERS OF THE REGION KHADIR BET, KACHCHH
Authors: Kazi Ashmabanu , Patel Harsh , Mankad Dr. Archana
Published: April 2023

The present study was conducted to assess water quality using physico – chemical parameters. Water samples consumed by the livestock were collected from selected locations of Khadir bet, Kachchh region. The parameters analyzed include pH, EC, TDS, chloride, Ca+2 + Mg+2, Sodium, RSC (Residual sodium Carbonates), and SAR (Sodium Adsorption Ratio). Livestock lives in close proximity to humans, so the permissible limit of drinking water is the same in India. The results obtained in the analysis show that there were several parameters that were found to be beyond limits in the physico – chemical analysis. In the obtained result, it becomes clear that at some locations drinkable water used by the livestock is considerably polluted and unfit to be consumed.
JYOTI PRASAD AGRAWALA’S FILM JOYMOTI AND CULTURAL CONTEXT
Authors: Mech Utpal
Published: April 2023

Jyoti Prasad Agrawala (1903-1951) played an unforgettable role in the revival of modern Assamese culture. Jyoti Prasad Agrawala is one of the greatest Assamese born in the first decade of the twentieth century, who made an unprecedented contribution to the world of literature, art and culture through his creative talent. He was also the director and producer of the first Assamese film, Joymoti, which was released in his hands. The film was released in 1935 and was not only a pioneer in the Assamese film industry but also the pulse of national life. The proposed paper will briefly discuss these aspects. The main purpose of this paper is to discuss how Jyoti Prasad Agrawala played a strong role focusing on his film activities in the revival of modern Assamese culture and in the development of arts and culture on the basis of his talent and new ideas.
Beihilferecht Jahrbuch 2023
Authors: Jaeger Thomas , Birgit Haslinger
Published: April 2023

Das etablierte Jahrbuch zu den aktuellen Entwicklungen im Beihilferecht Das Jahrbuch Beihilferecht versteht sich als kombiniertes Informations- und Diskussionsmedium, das aktuelle Entwicklungen des Rechtsgebiets auf breiter Basis und für einen weiten Kreis an Nutzern aus Wissenschaft und Praxis dokumentiert und aufbereitet. Besonderes Augenmerk liegt auf einer einfachen Orientierung und dem raschen Auffinden von Informationen im Text. Ein Überblicksteil informiert in Kürze über wesentliche Legislativakte, Urteile der Unionsgerichte und besonders interessante Entscheidungen der Kommission im Berichtsjahr. Im Beitragsteil des Jahrbuchs werden sodann ausgewählte Fragestellungen näher diskutiert. Das Jahrbuch 2023 enthält Beiträge zu COVID-19, der Ukraine-Krise, Energiebeihilfen sowie weiteren aktuellen Themen.
Compact Binary Merger Rate in Dark-matter Spikes
Authors: Fakhry Saeed , Salehnia Zahra , Shirmohammadi Azin , Yengejeh Mina Ghodsi , Firouzjaee Javad T.
Published: April 2023

Today, the existence of supermassive black holes (SMBHs) in the center of galactic halos is almost confirmed. An extremely dense region referred to as dark-matter spike is expected to form around central SMBHs as they grow and evolve adiabatically. In this work, we calculate the merger rate of compact binaries in dark-matter spikes while considering halo models with spherical and ellipsoidal collapses. Our findings exhibit that ellipsoidal-collapse dark-matter halo models can potentially yield the enhancement of the merger rate of compact binaries. Finally, our results confirm that the merger rate of primordial black hole binaries is consistent with the results estimated by the LIGO-Virgo detectors, while such results cannot be realized for binary neutron stars and primordial black hole-neutron star binaries.
Scaling Anisotropy with Stationary Background Field in Near-Sun Solar Wind Turbulence
Authors: Wu Honghong , He Jiansen , Huang Shiyong , Yang Liping , Wang Xin , Yuan Zhigang
Published: April 2023

The scaling of magnetic fluctuations provides crucial information for the understanding of solar wind turbulence. However, the observed magnetic fluctuations contain not only turbulence but also magnetic structures, leading to the violation of time stationarity. This violation would conceal the true scaling and influence the determination of the sampling angle with respect to the local background magnetic field. Here, to investigate scaling anisotropy, we utilize a simple but effective criterion ϕ < 10° to ensure the time stationarity of the magnetic field, where ϕ is the angle between the two averaged magnetic fields after cutting the interval into two halves. We study the scaling anisotropy using higher-order statistics of structure functions under the condition of stationarity for near-Sun solar wind turbulence for the first time based on measurements obtained from the Parker Solar Probe at 0.17 au. We find that the scaling indices ξ of the magnetic field show a linear dependence on the order p close to ξ(p) = p/4. The multifractal scaling of the magnetic-trace structure functions becomes monoscaling close to ξ(p) = p/3 with the local magnetic field perpendicular to the sampling direction and close to ξ(p) = p/4 with the local magnetic field parallel to the sampling direction when measured with the stationary background magnetic field. The scaling of the velocity-trace structure functions has similar but less significant changes. The near-Sun solar wind turbulence displays different scaling anisotropies from the near-Earth solar wind turbulence, suggesting the evolution of the nonlinear interaction process during solar wind expansion.
Species of Peperomia (Piperaceae) from the Saña River Valley, Peru
Authors: Pino Infante Guillermo Eloy , Samain Marie-Stéphanie , Albán Castillo Joaquina Adelaida , Alomía Collazos Luis Enrique Aarón
Published: April 2023

The Saña River Valley in Northern Peru is unusual for the western slopes of the Peruvian Andes because of its nearly year-round regime of precipitation instead of marked seasonal dry winters. This results in unexpected plant diversity. We surveyed the species of Peperomia (Piperaceae), occurring in this valley from 300 to 3000 m elevation, based on the study of specimens from ten herbaria and field collections, resulting in a total of 81 accessions, of which 48 were made by the authors. We found 16 different taxa: Peperomia cacaophila, from Ecuador, is reported for the first time in Peru; P. cymbifolia, P. dolabriformis and P. emarginulata are reported for the first time for the Saña River Valley; other widely distributed species like P. fraseri, P. galioides, P. haematolepis, P. hispidula, P. inaequalifolia, P. microphylla, and P. rotundata were also found. Five species new to science are described: P. pilocarpa, P. riosaniensis, close to P. palmiformis from Amazonas; P. sagasteguii, related to P. trinervis, P. symmankii, close to P. ricardofernandezii from Piura, and P. vivipara, related to P. alata. A key to the species of Peperomia from the Saña River Valley, based on vegetative characters, is provided.
A multivariate approach to morphological study of shell form in cowries (Gastropoda, Cypraeidae): a case study with Umbilia armeniaca (Verco, 1912)
Authors: Southgate Paul C. , Militz Thane A.
Published: April 2023

Multivariate approaches to morphological study of shell form have rarely been applied to cowries (Gastropoda: Cypraeidae) with preference, instead, for comparing formulaic notations of shell form that report averages (i.e., means) for key morphometrics such as shell dimensions, their ratios, and counts of apertural teeth. Although widely applied, the “shell formula” does not account for variation among individuals or support statistical comparison between taxa. This study applied a multivariate approach to analyse shell form within the four accepted subspecies of the cowrie, Umbilia armeniaca (Verco, 1912) and included a previously unstudied, and most northerly, population of U. armeniaca from Lancelin, Western Australia. Multivariate analyses readily separated the recognised subspecies of U. armeniaca (U. a. armeniaca, U. a. diprotodon, U. a. clarksoni and U. a. andreyi), but did not separate the Lancelin population from U. a. andreyi, indicating that the former represents a northward extension of U. a. andreyi that is not morphometrically distinguishable. These results provide improved understanding of infraspecific differences in shell form of U. armeniaca across its broad distribution, and demonstrate the utility of multivariate morphometric methods for statistical comparison of shell form between taxa. This approach is complimentary to existing research practices and has broad potential application in future morphometric studies of both extant and fossil taxa within the family Cypraeidae.
Un jeu de miroirs transatlantique
Authors: Quelennec Bruno
Published: April 2023

Résumé Partant du principe que les raisons de la politisation (ou non) de la référence théorique « Leo Strauss » ne peuvent être élucidées qu’en considérant ensemble les écrits du philosophe et les processus de réception dont ils font l’objet, cette contribution propose quelques éléments de biographie intellectuelle, distinguant six « séquences » puis elle met en lumière l’aspect « polyphonique » de l’oeuvre straussienne, semblant autoriser les lectures les plus contradictoires. Suit une exposition de deux paradigmes opposés de réception : la réception étatsunienne, rythmée par les polémiques depuis les années 1980, la réception française, assez consensuelle. À la fin du texte, nous tentons d’expliquer comment Strauss a pu devenir une figure canonique en France dans le contexte du « retour de la philosophie politique » des années 1980-1990.
L’écriture réticente, condition de possibilité de la philosophie
Authors: Ciccarelli Pierpaolo , Juhel Pierre O.
Published: April 2023

Dans cet article, je discute quatre contributions récentes sur Leo Strauss écrites par des chercheurs italiens : celles de M. Farnesi Camellone (1), de M. Menon (2), d’A. Ghibellini et la mienne (3). Il s’agit ici de clarifier les raisons pour lesquelles, dans plusieurs études italiennes des deux dernières décennies, Strauss a été étudié davantage comme philosophe que comme penseur politique au sens strict. La principale réside à mon avis dans la relation que Strauss lui-même a établie entre le « problème de la possibilité de la philosophie », relatif à la séparation de l’épistémé d’avec la doxa , et la nécessité de « l’écriture réticente ». L’écriture réticente est un outil méthodologique permettant de contrôler le conflit généré par la question philosophique de la justice, un conflit aux conséquences potentiellement exorbitantes pour la philosophie en tant que mode de vie.
Métamorphose de la violence avec le jeu vidéo
Authors: Epivent Lucie
Published: April 2023

À partir des concepts métapsychologiques, nous verrons comment naît la violence chez le sujet et comment celle-ci tend progressivement à se transformer en agressivité, dite secondaire. Nous décrirons ensuite comment ce processus est remis en mouvement lors de l’adolescence et peut venir fragiliser les digues psychiques préalablement établies. Nous proposerons de médiatiser la rencontre thérapeutique avec ce profil d’adolescents, pour lesquels les passages à l’acte violents deviennent un mode d’interaction privilégié. A partir de l’utilisation du jeu vidéo en séance avec la psychothérapeute, nous observerons les possibilités de remaniements psychiques tels qu’observés lors des premiers temps du développement psycho-affectif.
What can analysis of Space-Time of Action tell us about medium-term changes in adults’ and children’s access to place of activity? The example of Bogotá
Authors: Demoraes Florent , Gouëset Vincent , Souris Marc
Published: April 2023

This article draws on the space-time prism as formalized in time-geography (Hägerstrand 1970) and on spatial analysis methods to examine medium-term changes to household members’ access to place of activity, against the backdrop of urban change. The analytical framework thus uses the concept of Space-Time of Action (Demoraes et al. 2020a), referring to the combination of all the places of work or study that individuals go to, and the time taken to reach them from home. The analysis is based on two surveys conducted in Bogotá (Colombia) in 1993 and 2009 to apprehend individuals’ spatial mobilities. Two groups at different stages in their life course and co-residing in the same households are studied: schoolchildren and working adults. First, Space-Times of Action are calculated and mapped using kernel outer rings delineating the concentration of destinations for the two groups and the nine survey zones at each date. Second, the statistical significance of the discrepancies between Space-Times of Action is assessed using a bivariate colocation test. The test indicates overall stability in children’s access to place of schooling, but a more contrasting situation for adults.
Tourism, Internet Usage, and Safety
Authors: Akarsu Gülsüm
Published: April 2023

Information and communication technologies have gained further importance due to digitalisation in many areas including tourism and security. This chapter aims to analyse interrelationships between tourist arrivals, crime rates, and internet usage by employing panel data techniques and using data on 23 countries from 2008 to 2017. Findings indicate one-way causality from internet usage to tourist arrivals and crime rates. Results also show a high level of persistency in tourist arrivals and moderate persistency in crime and theft. Furthermore, internet usage and population density were found to increase tourist arrivals. The author also found that inflation may increase crime and theft. In conclusion, countries should take urgent steps to decrease inflation to ensure a safer country and they can employ information and communication technologies for security improvement and tourism development.
TECNOLOGIAS EM SAÚDE DESENVOLVIDAS PARA A POPULAÇÃO NO BRASIL: REVISÃO INTEGRATIVA DA LITERATURA
Authors: Aquino Susan Karen , Camargo Barbosa Ana Jéssily , Gonçalves Caroline Amélia , Munhak da Silva Rosane Meire , Silva Sobrinho Reinaldo Antonio , Zilly Adriana
Published: April 2023

A educação em saúde é uma área de conhecimento voltada à saúde pública que passou por amplas rediscussões nos últimos dez anos, podendo ser aprofundada por todos os profissionais em espaços de atuações diferentes. O progresso na tecnologia de comunicação e informação e a propagação da internet abriram as barreiras geográfico-temporais de alcance à educação profissional; logo, as tecnologias são os instrumentos que podem ser utilizados para simplificar a aprendizagem e o ensino para população. O objetivo deste estudo foi realizar uma revisão integrativa referente aos estudos científicos que desenvolveram tecnologias na área da saúde no período de 2013 a 2017. Esta pesquisa, por meio dos artigos, é empreendida nas bases de dados Scielo, BVS e Pubmed. Foram incluídos os estudos originais, disponíveis e completos, que discorriam acerca do tema tecnologias desenvolvidas para educação em saúde, nos idiomas português, inglês e espanhol. Encontrou-se 2418 referências na base do Scielo, 71 na BVS e 197 na Pubmed, dentre os quais foram selecionados 19 artigos para a análise final, dentre os quais a área da Enfermagem foi a que mais publicou, a maior produção foi oriunda da região Norte do Brasil e houve um aumento na produção no ano de 2017. Diversos materiais didáticos foram desenvolvidos para educação em saúde, sendo o mais frequente a cartilha.
Theoretical Study on CO2/SO2 Absorption Using N- Alkylethylenediaminium Protic Ionic Liquid
Authors: Huang Hui , Hua Er
Published: April 2023

The protic ionic liquids (PILs) comprising with N-2-ethylhexylethylenediaminium cation (HEtHex+) and bis (trifluoromethanesulfonate) imide anion (TFSA-) forming [HEtHex][TFSA] which has two amines in the polar group and available to absorbs acid gases such as CO2 and SO2. In order to study the CO2/SO2 absorption mechanism of [HEtHex][TFSA], the stable configurations of [HEtHex][TFSA]-nCO2 (n=1, 2, 3, 4) and [HEtHex][TFSA]-nSO2 (n=1, 2, 4, 6) are investigated using the density functional theory at the M06-2X/6-311G (d, p) level, then the interaction energy, molecular vibration frequency, second-order perturbation energy, electron density and Laplace value are calculated and analysed for the most stable configurations. The results show that N–H...O type weak or medium hydrogen bonding are mainly formed between [HEtHex][TFSA] and CO2/SO2 molecules. The hydrogen bonding interaction is stronger for [HEtHex][TFSA]-nSO2 comparing with [HEtHex][TFSA]-nCO2 and increases with increasing the number of CO2/SO2 molecules.
TEAMX or Manned and Unmanned Cooperation
Authors:   Airbus Helicopters, Thomassey Lionel , Arlen Lionel
Published: April 2023

Since several years the UAVs (Unmanned Aerial Vehicle) win more and more market. For specific short missions, UAVs perform surveillance or infrastructure checking. However, due to the UAV limitation in terms of endurance and autonomy, for many missions the cooperation between manned and unmanned aircraft is needed. The UAV will play the role of deported arms and eyes of the helicopter. With such innovation, the helicopter performs what the UAV cannot do and on the operation theatre the UAV performs what the helicopter cannot do anymore.

In order to ensure the multipurpose platform functionality of the helicopter, the cooperation system will be considered as an optional and will demand only simple and quick plug and play actions. The main constraints are to relatively locate the UAV and Helicopter with a centimetric accuracy and in addition to ensure safety in flight (collision avoidance) with functionality such as geo and helicopter fencing. With an efficient MUM-T architecture system, we will be capable to perform missions with an increased level of safety, to increase the availability of the H/C, to enlarge the H/C mission perimeter, to reduce the pilot workload and to avoid human operation in the so called 3D (Dull, Dirty, Dangerous) zones.
Improvements to a Helicopter Gun System Controller Using Active Damping and Ramp Rates for the Bending Corrections
Authors:   The Boeing Company, Sandoval Andres , Handley Mark
Published: April 2023

During the firing of a gun mounted on the body of a helicopter, aircraft body and gun turret vibrations and bending disturbances result in bullet dispersion affecting gun accuracy. As a legacy helicopter was modernized, system dynamics changed thereby increasing the disturbance effects on gunfire accuracy. These system dynamic changes caused an out of specification dispersion of bullets that needed to be reevaluated and because of restrictions, a new system not procured. Thus to reduce vibrations and bending disturbances on a legacy helicopter mounted gun system, two solutions were developed and assessed: active damping and ramp rates for the bending corrections. These solutions carefully took into consideration vibrations caused by the recoil of the gun during firing and also the gun control system settling time in relation to physical deformation of the mechanical system when applying a bending correction. Both solutions deal with gun position control design and use software design modifications to reduce bullet impact dispersion with specific emphasis on the elevation axis and early rounds in a firing burst. Active damping with baseline bending corrections showed a 56% decrease of gun movement on the elevation axis during firing. Using both active damping and ramp rates for the bending corrections resulted in overall 15-50% improvements in bullet impact dispersion on the elevation axis when firing from a hover.
A Retrospective & Historical Analysis of Vertical Lift Infrastructure Accidents for the Purpose of Operational Risk Identification and Accident Prevention
Authors:   Five-Alpha LLC, Alexander Rex ,   Federal Aviation Administration, Johnson Cliff ,   HeliExperts International, Syms Raymond ,   US DOT Transportation Safety Institute, Roberts John
Published: April 2023

This paper represents a retrospective and historical analysis of helicopter accidents which have occurred at designated landing areas and explores the role infrastructure played as it relates to the chain of events leading up to the accident. The primary focus is to identify, classify, and categorize causational factors created by poorly or improperly designed and/or implemented infrastructure as it relates to helicopter accidents. Based on these findings, this paper will identify risk mitigation strategies and best practices that can be applied for the purpose of preventing these types of occurrences. While this data will be specific to helicopter flight operations and infrastructure, it is intended to provide insight into future best practices as it applies to Advanced Air Mobility (AAM) infrastructure as well.
Extraction of Flight Dynamics Data from Level D Qualification Flight Tests. Application to Training Simulators Model Fidelity Enhancement
Authors:   ONERA, Taghizad Armin ,   Thales Training & Simulation, Richard Sylvain ,   US Army TDD, Clark Robert , Tischler Mark
Published: April 2023

Between 2018 and 2020 the NATO Science and Technology Organization (STO) engaged a Research Task Group (RTG) on rotorcraft flight simulation model fidelity. The primary goal of this RTG was to apply and compare flight simulation model enhancement methods and fidelity assessment criteria based on flight-test case studies. Under the AVT panel 296 (Applied Vehicle Technology), 20 partners from NATO nations' industries, governmental research establishments and universities tested 7 different model updating or "renovation" methods through comparison of simulation models vs flight data. Comparisons between update methods have been investigated to find best practices and suitability for different applications including advanced rotorcraft configurations. Most of the existing methods make extensive use of System Identification (SID) to generate improved-fidelity state-space models. Thereafter, these models are used as a reference for nonlinear model improvements. Among the case-studies carried-out, ONERA, US-Army and THALES Training and Simulation run a collaborative work to investigate the potential use of flight data from simulator’s Qualification Test Guides (QTG) in System Identification. The objective behind this work was to assess whether the state-space models resulting from this identification could be used and contribute to enhance the physics-based model. The renovation technique based on deltas of forces and moments was applied to select the most relevant derivatives of the identified model. The analysis of the derivatives helped identify some improvement axes of the physics-based model. This paper will present the work carried out in the scope of this collaboration.
Fault-Tolerant Control Allocation on a Compound Helicopter in Cruise
Authors:   Rensselaer Polytechnic Institute, Vayalali Praneet , Gandhi Farhan , McKay Michael
Published: April 2023

The present study provides a comparison of an adaptive versus a robust baseline pseudoinverse control allocation method on a 20,110 lb compound helicopter post-actuator failure. Failure scenarios such as locking of the main rotor swashplate actuators and aerosurface actuators are taken into consideration in forward flight. A range of tolerable positions for locked-in-place actuator failures is established for the aircraft at a cruise speed of 150 knots. A full authority model following linear dynamic inversion control architecture is implemented for the nonlinear simulation model. Stability margins, phase delay, bandwidth, and disturbance rejection specifications for the aircraft were evaluated under different actuator failures with adaptive and robust control allocations. Nonlinear simulations are used to examine the benefits and drawbacks of an adaptive and robust control allocation schemes when the aircraft is subjected to different actuator failure at their extreme positions.