bluuebunny/crossref_metadata_2025 huggingface dataset:
Plataforma ARADOS: una metodología de diagnóstico urbano participativo aplicada a un proyecto de innovación empresarial desarrollado en el ámbito rural (Valladolid)
Authors: González-Álvarez Sara , Del-Caz-Enjuto Mº Rosario
Published: March 2024

El artículo presenta la metodología de diagnóstico urbano participativo utilizada en ARADOS, un proyecto de innovación empresarial desarrollado en un entorno rural. Se trata de un proyecto piloto aplicado a la mancomunidad del valle del Esgueva (Valladolid), cuyo objetivo ha sido testar la potencialidad de una plataforma on-line que conecte a los adultos mayores demandantes de productos y servicios con los proveedores de los mismos, y que ha requerido del desarrollo de una metodología innovadora de identificación de necesidades. Ésta se basa en la combinación de experiencias sobre participación ciudadana en el planeamiento urbano y protocolos de actuación para la comprensión de las demandas cotidianas de las personas mayores. Se expone el proceso de elaboración e implementación de la metodología con el fin de mostrar un modus operandi con resultados positivos y, por tanto, replicable.
Air Quality Assessment Based on a Smart Locally CO2 Monitoring System with Validation by a Reference Instrument
Authors: Jacob Mbarndouka Taamté  , Vitrice Ruben Folifack Signing  , Modibo Oumar Bobbo  , Kountchou Noubé Michaux  , Yerima Abba Hamadou  , Saïdou
Published: March 2024

This article deals with the development and implementation of a low-cost smart air quality monitoring device. The study aims to develop a simple, efficient, and cheap device for real-time monitoring of Carbon dioxide (CO2) concentration and atmospheric parameters such as temperature (T) and relative humidity (RH). The realized device consists of sensors, a data storage system, a programmable card, and wireless modules for Internet of Things (IoT). It is designed for indoor and outdoor air quality monitoring. Wireless communication between the device and the control PC is ensured by the ZigBee protocol. The MH-Z14A sensor was calibrated according to the manufacturer’s recommendations and then experimentally in the laboratory. A calculation of the CO2 regression line for the devices using the least squares method gave R2 = 0.6889. The slope test using the Student method at a significant coefficient of 1% threshold and 19 degrees of freedom gave t(1%; 19) = 2.539. This illustrates that the result obtained by the realized device has less than a 1% chance of being obtained at random. An investigation was carried out to assess air quality because following the proliferation of pollutants, the normal concentration of atmospheric CO2 (400 ppm) has considerably changed. Thus, the data processed are outdoor concentrations collected in November 2022 in some localities of the Adamawa Region, Cameroon. The average values of CO2 concentration measured in four subdivisions are 497.30 ± 11.32 ppm in Ngaoundéré 1, 481.83 ± 14.90 ppm in Ngaoundéré 2, 568.63 ± 25.03 ppm in Martap and, 624.14 ± 3.96 ppm in Minim. Martap and Minim are among the most important bauxite deposits in the world. These CO2 values higher than the normal atmospheric concentration indicate a moderate Air Quality Index (AQI) in these cities during the measurement period. The designed device is inexpensive, reliable, and appropriate for air quality monitoring.
Design and Analysis of the Waste Heat Recovery System for Stenter Exhaust
Authors: Chen Yimin , Liu Bo , Zeng Zheng , Li Liqing
Published: March 2024

In this study, combined with the exhaust adsorption, desorption and catalytic combustion technology, a waste heat recovery scheme using stenter exhaust to heat desorbed air and preheat stenter suction air was proposed. Using Aspen Plus to design the waste heat recovery system, and using Aspen EDR to design the structure of heat exchangers. The energy utilization efficiency of waste heat recovery system was evaluated through the exergy analysis, and the influence of exhaust flow rate variation on exergy efficiency of heat exchanger under different exhaust temperatures were discussed. Moreover, the influence of fluid parameter variations on the heat transfer process was also analyzed. Finally, the economic calculation was carried out and the overall energy-saving effect of waste heat recovery system was demonstrated. The results showed that the utilization of this waste heat recovery system can recover 537 kW, the exergy efficiency of desorbed air heat exchanger and preheating air heat exchanger were 51% and 58.9% respectively. In terms of the economic evaluation, the annual energy-saving economic benefits was about $ 89,312, and the static investment payback period was 1.17 years.
Reducing Non-Revenue Water
Authors: Ahmed Zakaria Yehia
Published: March 2024

Non-Revenue water (NRW) refers to water produced and lost before reaching consumers. The summary focuses on the importance of reducing Non-Revenue water (NRW), as it increases water availability and the revenues of drinking water. This reduction is achieved when we install the flow meters and water pressure devices at water sources or inlets and exits of isolated areas. We can calculate the amount of water supplied to the area, comparing it with the calculated amount and determining the volume of water not subject to accounting. To solve this, actions like leak detection to determine the location of hidden connections and installation of effective water meters. Supervisory Control and Data Access (SCADA) systems have a role in water management, providing control and real-time monitoring, early problem detection, improved efficiency, and support decision making. When we use Supervisory Control and Data Access (SCADA) technology, we can reduce water losses, ensure reliable water supplies, and contribute to city water management practices. Reducing inaccurate billing or theft can increase revenue. Also, reducing physical/real losses, like leakages or inefficient distribution systems, engage water and wastewater companies to postpone investment in water resource development. To achieve the challenge, cooperation between departments such as network operations, hydraulic analysis, and geographic information systems is required. The commercial sector is important to evaluate and identify the different components that contribute to reducing water loss (NRW).
FAKTOR-FAKTOR YANG MEMPENGARUHI PRODUKSI IKAN DI DESA NANGADHERO KECAMATAN AESESA KABUPATEN ENDE
Authors: Muku Monika Natalia , Djata Baltasar Taruma , Sedho Yuliana
Published: March 2024

This study aims to determine and explain the factors that influence fish production in the Nangadhero village, Aesesa District, Nagekeo Regency. The population in this study were all members of the fishing community who work as fisherman in the Nangadhero Village. Totaling 129 people. The sample in this study amounted to 98 people using simple random sampling technique in this research is by distributing questionnaires to fisherman. The data analysis technique uses Multiple Linear Regression analysis with calcutions using the SPSS 21 program. Based on the results of the analysis that has been done, this study shows that education has a negative and insignificant effect on fish production, while skillsin using fishinggear have a positive and significant effect on fish production. The results of this study can be used to formulare effective policies and strategies for activities to increase fish production and income of fishing communities in Nangadhero Village, and itis hoped that the local government can provide fishing equipment and education to improve the skills of fisherman through training programs.
Pengaruh Alokasi Dana Desa Terhadap Pembangunan Desa Tahu 2018-2020 di Desa Fatamari Kecamatan Lio Timur Kabupaten Ende
Authors: Ngera Elus F , Djata Baltasar T , Luciany Yohanes Paulus
Published: March 2024

Penelitian ini bertujuan untuk mengetahui tentang pemanfaatan Alokasi Dana Desa yang dikeluarkan oleh pemerintah Kabupaten Ende untuk pembangunan Desa di Desa Fatamari Kecamatan Lio Timur, untuk mengetahui sejauh mana sektor-sektor pembangunan Desa yang telah direalisasi di Desa Fatamari Kecamatan Lio Timur dan untuk mengetahui tanggapan masyarakat terkait dengan manfaat Alokasi Dana Desa dalam pembangunan Desa di Desa Fatamari Kecamatan Lio Timur. Metode yang digunakan dalam penelitian ini adalah deskriptif kuantitatif dengan mengunakan alat analisis Regresi linier sederhana, koefisien determinasi dan untuk menguji hopotesis digunakan uji t. Berdasarkan hasil penelitian dan analisis data yang dilakukan, maka hasil pengujian yang diperoleh bahwa manfaat alokasi dana desa yang tepat sasaran memberi dampak pengaruh terhadap pembangunan infrastruktur desa dan meningkatnya kesejateraan masyarkat.
Analisis Sektor Ekomomi Potensial dan Struktur Ekonomi di Kabupaten Ende Pada Periode 2014-2019
Authors: Kara Maria K , Penu Yustina P , Luciany Yohanes Paulus
Published: March 2024

Penelitian ini bertujuan 1) mengetahui sektor-sektor apa saja yang menjadi sektor ekonomi potensial, 2) mengetahui struktur perekonomian, 3) mengetahui sektor-sektor ekonomi apa saja yang ada di Kabupaten Ende tahun 2014-2019 yang memiliki daya saing. Metode dalam penelitian deskriptif dengan pendekatan  kuantitatif, alat analisis LQ dan Shiftshare. Hasil penelitian 1) hasil analisis LQ yang menjadi sektor unggulan di Kabupaten Ende Provinsi NTT pada tahun 2014-2019 dengan kriteria LQ > 1, adalah sektor jasa perusahaan sebesar 1,50, diikuti oleh grosir dan sektor perdagangan eceran dan reparasi mobil dan sepeda motor sebesar 1,43, sektor Transportasi dan Pergudangan sebesar 1,27, sektor Real Estate sebesar 1,18, sektor Manufaktur sebesar 1,16, sektor Jasa Lainnya sebesar 1,13, Penyediaan Air Minum, Pengelolaan Sampah sebesar 1,10, Pengolahan Limbah Sektor konstruksi 1,03, dan sektor Pertambangan dan Penggalian 1,02.  2) hasil analisis Shift Share di Kabupaten Ende Provinsi NTT Tahun 2014-2019, sektor yang memiliki pertumbuhan rendah dan daya saing tertinggi dengan nilai Cij positif adalah sektor Industri Manufaktur sebesar 36,08, sektor Listrik dan Pengadaan Gas Bumi sebesar 7,58, sektor Penyediaan Air, sektor Pengelolaan Sampah, Limbah dan Daur Ulang sebesar 1,68, sektor Konstruksi sebesar 10,02, Sektor Perdagangan Besar dan Eceran; Reparasi Mobil dan Sepeda Motor sebesar 344,27, Sektor Transportasi dan Pergudangan sebesar 186,64, sektor Akomodasi dan Penyediaan Makanan dan Minuman sebesar 41,90, Sektor Informasi dan Komunikasi sebesar 4,184, dan Insuransi sebesar 16,2, dan Jasa Keuangan sebesar 228,16, Sektor Jasa sebesar 2,37, Sektor Administrasi Pemerintahan, Pertahanan dan Jamsostek sebesar 374,79, Sektor Jasa Pendidikan sebesar 53321,61, Sektor Jasa Kesehatan dan Kemasyarakatan sebesar 12,60 dan Sektor Jasa lainnya sebesar 10,50. Yang tergolong sektor unggulan yang didominasi oleh sektor jasa, menunjukkan bahwa telah terjadi pergeseran struktur perekonomian di Kabupaten Ende pada periode 2014-2019 dari sektor primer ke sektor tersier, hal ini disebabkan oleh kemajuan zaman dan keterbukaan teknologi transportasi dan komunikasi.
Faktor-Faktor yang mempengaruhi Pendapatan Petani Garam di Desa Wewaria, Kecamatan Wewaria, Kabupaten Ende
Authors: Kaki Fransiskus , Nona Reyna Virginia , Sedho Yuliana
Published: March 2024

ABSTRACT

This study aims to determine the factors that affect the income of saltfarmers in Wewaria Village, Wewaria District, Ende Regency. The type ofresearch used is a quantitative approach to see if there is an influence of capital,labor, land area and selling prices on the income of salt farmers. This researchdata was obtained from questionnaires and observations as well as directinterviews with related parties, namely salt farmers. The analytical method used to test the correctness of this hypothesis is a multiple linear regression model in the form of the SPSS Version 24 program. The results showed that first, capital had a positive and significant effect on the income of salt farmers, where the value of twas calculated > ttable (2.227 > 1.662). Second, labor has a positive and significant effect on the income of salt farmersbecause the value of tis calculated > ttable (2.148 > 1.662). Third, land area has apositive and significant effect on the income of salt farmers, because the value oftis calculated > ttable (2.161 > 1.662). Fourth, the selling price has a positive andsignificant effect on the income of salt farmers because the value of tis calculated >ttable (2,930 > 1,662). The five capital, labor, land area, and selling pricesimultaneously have a positive and significant effect on the income of saltfarmers, with Fcalculated values > Ftables (35,723 > 2.48). The six selling prices are themost dominant factors affecting the income of salt farmers in Wewaria Village,Wewaria District, Ende Regency.
Faktor-Faktor yang mempengaruhi Stabilitas Harga Beras Soa di Kecamatan Soa Kabupaten Ngada
Authors: Dewi Cintya Permata Mutiara , Nona Reyna Virginia , Penu Yustina Paulina
Published: March 2024

This study aims to find out (1) Does the rice production process affect the price stability of Soa rice in Soa District (2) Does the demand for rice from outside the region affect the price stability of Soa rice (3) Does the availability of Bulog rice entering Soa District affect rice price stability Soa (4) Does riceproduction, demand for rice from outside the region and the availability of rice from the National Logistics Agency affect the price stability of Soa's rice. This research includes causality research using a quantitative approach. The sample in this study were 98 farmers. Data was collected by using a questionnaire that has been tested with classical assumptions. Multiple linear regression is used to test the research hypothesis. The results of this research show that, (1) There is a significant effect of rice production on the price stability of Soa rice with a value of 17.071 (2) There is a significant effect of demand for rice from outside the region on the price stability of Soa rice with a value of 3.493 (3) There is no significant effect on the price stability of Soa rice with a value of -11.323. Thevariables of rice production, demand for rice from outside the region and availability of rice from the National Logistics Agency significantly affect the pricestability variable of Soa rice with a significant value of 0.000<0.05.
Pengaruh Jumlah Penduduk, Tingkat Pendidikan, Inflasi dan Pengangguran terhadap Tingkat Kemiskinan di Kabupaten Flores Timur Tahun 2013-2022
Authors: Tajriah Suryati , Sagajoka Estherlina , Djata Baltasar Taruma
Published: March 2024

This study aims to determine the effect of population, education level, inflation and unemployment on poverty levels in East Flores District partially and simultaneously. This study uses quantitative research methods with the analysis technique used is the semilog linear regression model. To calculate the linear regression equation, the semilog model data must meet the classical assumption test and hypothesis test. This is evidenced by the results of the parametric significant test (t test). The coefficient value of the population variable is 2,322 with tcount2,015), the coefficient value of the education level variable is -14.502 with tcount<ttable                                (-2.307<2,015), the inflation variable coefficient value is -0.784 with tcount<ttable (-4.781<2,015) and the coefficient value of the unemployment variable is 3.736 with tcount>ttable (3.401>2,015). Then for the F test, the value of Fcount>Ftable(7.642>5.19) is obtained. Based on the results of the calculation of the t test, it can be concluded that the population variable has no effect on the poverty level because the addition of the population is followed by a higher increase of other factors which are indicated to reduce poverty such as increased income in the community, causing a high poverty rate. goverment to finance his education thereby reducing the poverty rate in East Flores Regency. Inflation has a negative effect on the level of poverty, even though there is inflation, the poor are still able to meet their needs and unemployment affects the level of poverty because the unemployed are people who do not have jobs and income so they cannot make ends meet. Based on the F test that population, education level, inflation and unemployment simultaneously affect the level of poverty in East Flores Regency.
Order effects in stimulus discrimination challenge established models of comparative judgement: A meta-analytic review of the Type B effect
Authors: Ellinghaus Ruben , Bausenhart Karin M. , Koc Dilara , Ulrich Rolf , Liepelt Roman
Published: March 2024

This paper provides a comprehensive review of the Type B effect (TBE), a phenomenon reflected in the observation that discrimination sensitivity varies with the order of stimuli in comparative judgment tasks, such as the two-alternative forced-choice (2AFC) paradigm. Specifically, when the difference threshold is lower (higher) with the constant standard preceding rather than following the variable comparison, one speaks of a negative (positive) TBE. Importantly, prominent psychophysical difference models such as signal detection theory (Green & Swets, 1966) cannot easily account for the TBE, and are hence challenged by it. The present meta-analysis provides substantial evidence for the TBE across various stimulus attributes, suggesting that the TBE is a general feature of discrimination experiments when standard and comparison are presented successively. Thus, inconsistent with psychophysical difference models, subjective differences between stimuli are not merely a function of their physical differences but rather also depend on their temporal order. From the literature, we identify four classes of potential candidate theories explaining the origin of the TBE, namely (1) differential weighting of the stimulus magnitudes at the two positions (e.g., Hellström, Psychological Research,39, 345–388 1977), (2) internal reference formation (e.g., Dyjas, Bausenhart, & Ulrich, Attention, Perception, & Psychophysics,74, 1819–1841 2012), (3) Bayesian updating (e.g., de Jong, Akyürek, & van Rijn, Psychonomic Bulletin and Review,28, 1183–1190 2021), and (4) biased threshold estimation (García-Pérez & Alcalá-Quintana, Attention, Perception & Psychophysics,72, 1155–1178 2010). As these models, to some extent, make differential predictions about the direction of the TBE, investigating the respective boundary conditions of positive and negative TBEs might be a valuable perspective for diagnostic future research.
The Effect of Profitability, Company Size and Leverage on Company Value
Authors: Oktaviani Devina , Satriansyah Arief , Widianingrum Enggar
Published: March 2024

This study aims to determine and analyze the effect of profitability, company size, and leverage on company value in food and beverage sub-sector companies listed on the Indonesia Stock Exchange in 2020-2022. The type of research used is statistical quantitative used with a population of 84 companies. A sample of 19 companies was selected through a purposive sampling technique. The independent variables in this study are Profitability (ROA), Firm Size (LN), and Leverage (DER) while the dependent variable in this study is the company value (PBV). The results showed that partially, Profitability (ROA) and Leverage (DER) had a positive and significant effect on Firm Value (PBV). Meanwhile, Firm Size (LN) has no significant effect on Firm Value (PBV). Simultaneously profitability, firm size and leverage have a positive effect on firm value.
Attitudes of EFL Learners towards Communicative Language Teaching
Authors: Akramy Sayeed Asif , Daqiq Besmillah , Orfan Sayeed Naqibullah
Published: March 2024

Communicative Language Teaching, as a responsive teaching approach to the needs of learners, has been extensively recognized as a favorable approach to EFL teachers and learners around the world. The main purpose of this study is to investigate the attitudes of EFL students towards CLT in an Afghan EFL setting. It also attempts to determine the effects of CLT activities on their motivation and CLT challenges by their demographic profile. The data were collected from 201 English major undergraduate students from the Faculty of Language and Literature at Takhar University purposefully through a questionnaire which consists of 30 items. For answering the research questions, descriptive statistics, sample T-test, and a one-way ANOVA test were employed. The findings revealed that Afghan EFL students have positive attitudes towards CLT approach. The study also showed that the attitude of the students towards CLT is positive in terms of their gender. Moreover, there is no statistically significant difference among the group factors (age, first language, and English learning experience) of the participants.
Разработка метода измерений поперечника крученой хлопчатобумажной пряжи
Authors: Шустов Юрий Степанович , Зиновьев Тимофей Викторович , Зиновьев Виктор Павлович
Published: March 2024

В работе проведена классификация методов оценки распределения волокон в поперечном сечении пряжи. Однако кручёная пряжа отличается от одиночной и по структуре, и по внешнему виду, поэтому метод измерения диаметра кручёной пряжи имеет некоторые особенности, связанные с отличием её от одиночной. В этой связи появилась необходимость разработки более корректного метода определения объёмной плотности и диаметра кручёного продукта.

В работе предложен метод измерения диаметра крученой пряжи, который отличается от поперечного сечения одиночной пряжи. Приведены конкретные результаты расчета объемной плотности крученой пряжи с помощью прикладного пакета Mathcad с учетом угла наклона составляющих стренг.
Mathematical modeling of the process of hydrotreating diesel fuel from organosulfur impurities
Authors: Samoilov Naum A.
Published: March 2024

In this article, I want to introduce new methods for calculating the hydrodesulfurization process of diesel fuel.

Mathematical models for the interpretation of the feed stock and reaction rate constants for multicomponent systems are considered. Taking into account these models, the operation of industrial reactor blocks of hydrotreatment units is analyzed and new options for their prospective implementation are presented. It has been shown that these options will make it possible to reduce the amount of catalyst in the reactors.
Machine Learning Based on Road Condition Identification System for Self-Driving Cars
Authors: Sakthymayuran Ligitha , Kajanath Disne
Published: March 2024

Modern self-driving cars heavily rely on visual inputs to make decisions and it contains resolving significant computer vision issues. The development of deep learning has opened up a number of opportunities to enhance those computer vision issues and hence be able to enhance performance in autonomous driving applications. The primary function of vision-guided systems is object segmentation to comprehend the surroundings. This study uses deep learning techniques to create an effective model of the best path to follow an item on a self-driving vehicle. And helping with improved decision-making to locate the least expensive routes during navigation.
Physical Correlations and Predictions Emerging from Modern Core-collapse Supernova Theory
Authors: Burrows Adam , Wang Tianshu , Vartanyan David
Published: March 2024

In this paper, we derive correlations between core-collapse supernova observables and progenitor core structures that emerge from our suite of 20 state-of-the-art 3D core-collapse supernova simulations carried to late times. This is the largest such collection of 3D supernova models ever generated and allows one to witness and derive testable patterns that might otherwise be obscured when studying one or a few models in isolation. From this panoramic perspective, we have discovered correlations between explosion energy, neutron star gravitational birth masses, 56Ni and α-rich freezeout yields, and pulsar kicks and theoretically important correlations with the compactness parameter of progenitor structure. We find a correlation between explosion energy and progenitor mantle binding energy, suggesting that such explosions are self-regulating. We also find a testable correlation between explosion energy and measures of explosion asymmetry, such as the ejecta energy and mass dipoles. While the correlations between two observables are roughly independent of the progenitor zero-age main-sequence (ZAMS) mass, the many correlations we derive with compactness cannot unambiguously be tied to a particular progenitor ZAMS mass. This relationship depends on the compactness/ZAMS mass mapping associated with the massive star progenitor models employed. Therefore, our derived correlations between compactness and observables may be more robust than with ZAMS mass but can nevertheless be used in the future once massive star modeling has converged.
Lopsided Galaxy Distributions in Massive TNG300 Clusters
Authors: Mangis Kelsey A. , Brainerd Tereasa G.
Published: March 2024

Studies of isolated central galaxies and their satellites have shown that the spatial distributions of the satellites are distinctly “lopsided” with respect to the locations of the central galaxies. Here we extend this type of analysis to larger systems by analyzing the lopsidedness of 280 massive galaxy clusters in the IllustrisTNG300 Λ Cold Dark Matter simulation. Using a pairwise clustering statistic, we compute the probability that pairs of cluster galaxies are separated by a given polar angle difference, Δϕ, in the plane of the sky. Relative to the location of the central cluster galaxy, we find a statistically significant excess of galaxy pairs that are located on the same side of the cluster. The lopsidedness of the galaxy distribution is most pronounced for large clusters and for pairs of intrinsically red galaxies. The results summarized here were presented at the 243rd meeting of the American Astronomical Society.
DIFFERENT ASPECTS OF THE USE OF SMALL SATELLITES FOR OBSERVATION OF THE MODERN STAGE
Authors: Penev Pavel
Published: March 2024

The reasons for the appearance of small satellites have been revealed. The evolution of the military and civilian small satellites created in the 21st century for surveillance and intelligence, including dual-purpose ones, is reviewed. Three groups of tasks solved by small observation satellites are defined - applied, technological and scientific, as well as their growing importance and areas of use. The need is substantiated and steps are proposed in the Republic of Bulgaria, respectively in SRTI-BAS, to activate the activity of creating and using small satellites for observation for the needs of the economy, ecology, humanitarian and other areas.
SYSTEM IDENTIFICATION OF AIRCRAFT LONGITUDINAL MOTION BY MEANS OF FLIGHT SIMULATOR DATA
Authors: Metodiev Konstantin
Published: March 2024

In presented article, an exemplary problem of identifying parameters of an aircraft's motion within the vertical plane of symmetry is solved. The data was collected by FlightGear simulator for a Pilatus PC-9M aircraft flight case. After submitting a sequence of commands to pitch elevator and engine thrust, the simulator records five parameters of longitudinal motion at certain frequency. The collected data are further used to build a state-space model of the flight through least-squares estimation. The obtained numerical results are compared with the experimental ones and are overlaid graphically. Charts depicting elevator angle to trim are derived in addition. A source code developed in GNU Octave is applied with the help of which the problem was solved.
HYBRID MULTICOPTER DESIGNS
Authors: Zabunov Svetoslav , Mardirossian Garo
Published: March 2024

Hybrid unmanned aerial vehicles are such vehicles that employ more than one type of energy delivery system used for the powered flight. Hybrid drones are not restricted to using electrical power. Nevertheless, most such drones employ electric propulsion through the implementation of brushless three phase electrical motors in their rotors due to the inherent high efficiency and ease of control of such devices. Electrical energy for the motors is supplied by various sources such as batteries, hydrogen fuel cells, internal combustion engine electrical generators, etc. The current battery technology offers flight times from 10 minutes to 2 hours depending on the payload and drone design. For longer flight times a hybrid power system is required. The common hybrid drone design involves a combination of batteries and internal combustion engine electrical generator. The current article introduces two novel hybrid unmanned aerial vehicle designs. The first exhibits improved efficiency due to implementation of hybrid power system powering two horizontal tandem counter-rotating direct driven rotors and at least four electrically driven smaller horizontal attitude control rotors. The second presented herein invention offers addition of a horizontal rotor or rotors rendering the design a compound multicopter. The vertical rotor or rotors are also direct driven improving efficiency.
PERFORMANCE ANALYSIS OF CURVED SHAPE ON THE INLET GUIDE VANES IN CENTRIFUGAL BLOWERS
Authors: Stănescu Teodor , Ușeriu Daniel
Published: March 2024

This study aims to analyze the performance of two types of stator blades used in centrifugal blowers: forward-curved blades and backward-curved blades (concave and convex shapes), under various operating conditions and tilt angles. The primary goal of the research is to evaluate compression performance by comparing the results obtained for these two blade types. Ultimately, the objective of the study is to provide clearer insights for choosing the correct shape of the inlet guide vane in the specific field of application for centrifugal blowers.
REUSABLE AND LOW COST SPACE ROCKET ENGINE WITH HIGH EFFICIENT PROPELLANT PUMP
Authors: Saboktakin Abbasali , Monjezi Mohammad
Published: March 2024

Space propulsion mainly uses reciprocating pumps that are fully integrated with the small scale applications. In this paper, the specific specifications and designing factors that should be to be met by rocket engine fuel pumps are demonstrated, and a comparative study is formed of the suitableness of all the necessary kinds of pumps to be used with rocket engines and their applications. Furthermore, it examines a piston pump intended to refuel the liquid fuel nozzles. Due to the performance of this pump, different parts and its performance have been evaluated. The design of the pump is discussed such that after completing the design steps according to the pump performance, numerical solution of the stress and strain applied on the inner wall of the cylinder is performed according to its performance under internal pressure. Then, considering the consistency of the body material and the same pressure and heat applied to the cylinder and piston, a sample of the cylinder and piston is analyzed in finite element modeling technique and the modeling results obtained from the simulation are presented.
IMPACT OF SPACECRAFT AND ISS ENGINES ON EXPERIMENTAL SAMPLES OF VARIOUS MATERIALS MOUNTED ON THE OUTER SURFACE OF THE "ZVEZDA" MODULE
Authors: Getsov Peter , Teodosiev Dimitar , Zagorski Nikolay , Mardirossian Garo , Zafirov Dimo
Published: March 2024

The work presents a study of the influence of the spacecraft and ISS engines during the correction of the station's orbit. The zones of action of the gas jets and their impact on the environment and the surfaces of the experimental samples of various materials mounted on the outside of the Zvezda module were determined.
REVIEW OF THE APPLICATIONS OF SATELLITE REMOTE SENSING IN ORGANIC FARMING (PART ІI)
Authors: Chanev Milen , Filchev Lachezar
Published: March 2024

The use of remote sensing methods for monitoring, managing, and decision support in agriculture is increasingly intensifying. With the advancement of technologies, they become more accessible, while the quality and security of the obtained data are improving. Striving to improve the quality of the environment and its preservation, expanding the areas occupied by organic farming will allow us to achieve these goals. At the same time, this type of agriculture provides healthy and safe food. For this reason, it is of great importance to start applying satellite data in organic farming as quickly as possible. In Part II of the "Review of the applications of satellite remote sensing in organic farming," we examine the various areas of satellite data application in organic farming. Five different areas of satellite data application in organic farming have been identified, including satellite remote sensing monitoring of weeds, remote sensing of crop stress and irrigation needs, yield forecasting using remote sensing methods and remote sensing monitoring of plant nutrition. From the review conducted, we found that satellite data can significantly support and facilitate the transition to organic farming, adequate fertilization, application in phytosanitary monitoring of crops, and assessment of crop stress.
Spatial opportunities and constraints for green infrastructure network design
Authors: Spencer Douglas , Marques Alexandra , Veerkamp Clara , van der Marel Martijn , Verburg Peter , Namasivayam Anandi Sarita , Di Marco Moreno , Jung Martin , Kujala Heini , O'Connor Louise , Visconti Piero , Schipper Aafke
Published: March 2024

Opportunity costs, the foregone economic benefits from alternative activities or uses of a resource on a particular site, represent one of multiple options to approximate costs of nature conservation and can be used alongside biodiversity and ecosystem services data in spatial conservation prioritisation analyses. However, such cost data are not yet available across Europe. We created a European opportunity cost layer for productive (arable, pastoral and forestry) and urban lands at a spatial resolution of 1 km2, using land, resource, and residential rents. We mapped the opportunity costs of productive lands based on (sub)national land and resource rent data, which we allocated to the grid level based on gridded agricultural and forestry production data combined with country-specific commodity prices. We converted empirical data on property rents specific to housing type and city into area-standardised and city-specific rents and then applied these values to all cities and urban area within the respective country. When multiple cities from a single country were represented in the empirical dataset, a mean value of all the corresponding cities was used.
Beyond nutmeg, mace, and cloves: Checklist of the liverworts and hornworts of Maluku Islands (Moluccas), Indonesia
Authors: Nadhifah Ainun , Haerida Ida , Fastanti Fandri Sofiana , Söderström Lars , Hagborg Anders , von Konrat Matt
Published: March 2024

The first ever liverwort and hornwort checklist is provided for the Maluku Islands (Moluccas/Spice Islands) of Indonesia. We report 355 accepted and 16 doubtful species and reject 22 species previously reported for Maluku Islands. The list is based on the specimens housed in the Herbarium Bogoriense (BO) and reports from over 500 literature references, including monographs, regional studies, and molecular investigations. The Maluku Islands are part of the Wallacea Biodiversity Hotspot with many unique species found only in Wallacea. Publications focusing on liverworts and hornworts of Maluku Islands are few and scattered. Considering regionally widespread species that have been recorded elsewhere, we predict that further fieldwork exploring the diversity of habitats coupled with collections unveiled from regional herbaria, a number of new records remain to be reported.
Ajania flavida (Asteraceae, Anthemideae), a distinct new species from southwestern China
Authors: Chi Xiao-Rui , Wu Hai-Song , Wang Long
Published: March 2024

Ajania flavida, a new species from western Sichuan and eastern Xizang, China, is described and illustrated. It is readily assigned to A. sect. Ajania owing to its straw-colored, glossy involucres and marginally whitish scarious phyllaries. Within the section, it is distinct in being a shrub of 1−2 m in height, and in having creamy yellow florets. It is superficially similar to A. ramosa in A. sect. Phaeoscyphus, but can easily be distinguished by, among other characters, the plant height, color of the florets and margins of the phyllaries. In addition, we provide a distribution map of the new species.
Governance quality and international accounting standards adoption by microfinance institutions
Authors: Tchatchoua Nya Magloire , Kouao Guy Serge , Tchakoute Tchuigoua Hubert
Published: March 2024

Cette recherche part du principe qu'une gouvernance forte conduit les dirigeants à faire des choix comptables qui améliorent la transparence et la qualité de l'information financière. Sur la base d'un échantillon d'institutions de microfinance notées sur la période 2005-2012, notre étude montre que les institutions de microfinance (IMF) ayant une meilleure qualité de gouvernance d'entreprise sont plus susceptibles d'adopter les normes internationales d'information financière. Cet effet est plus marqué pour les IMF financièrement dépendantes.
L’adoption comme trajectoire corporelle. Soin du corps, apparences et différences physiques dans l’adoption d’enfants non blancs par des parents blancs
Authors: Brun Solène
Published: March 2024

Dans les familles issues de l’adoption internationale, la question des corps et de la différence physique entre parents et enfants est récurrente. À partir de l’exemple de l’adoption d’enfants afrodescendants par des parents racialisés comme blancs, cet article envisage l’adoption dite transraciale comme mettant en jeu une forme de trajectoire corporelle pour les personnes adoptées. Celles-ci sont en effet, par leur socialisation dans des familles blanches, prises dans une tension entre un corps-signal, marqueur d’une altérité racialisée, et un corps socialisé, support de manière de faire, de se mouvoir et d’exister qui sont parfois codées comme blanches.
Le Penseur noir. New Negro Renaissance et riposte corporelle au racisme dans les États-Unis des années 1920
Authors: Martin-Breteau Nicolas
Published: March 2024

À partir de la couverture du numéro de mai 1923 du magazine The Messenger , cet article explore la façon dont, pendant la Renaissance noire, l’exaltation de la puissance vitale du corps et de l’esprit du « New Negro » a pu constituer une stratégie antiraciste visuelle cherchant à contrer la stigmatisation et l’oppression de race. En présentant Le Penseur d’Auguste Rodin en homme noir, cette couverture prenait acte de la caractéristique corporelle de la haine raciale subie par les personnes noires afin, d’une part, de fortifier la confiance en soi de la communauté noire et, d’autre part, de détruire les stéréotypes dominants sur l’infériorité du corps noir.
Participation vs prescription : vers une réduction des inégalités sociales en promotion de la santé par le sport
Authors: Génolini Jean-Paul , Morales Yves
Published: March 2024

L’article montre à partir d’une analyse socio-historique que la politique « sport santé bien-être » en France s’est construite en suivant une approche médicale de la prévention et une gestion néo-libérale d’une offre sportive. La sédentarité apparaît comme un nouveau facteur de risque et l’activité physique adaptée une nouvelle thérapeutique. D’un côté, la prescription médicale d’un sport sur ordonnance accentue la médicalisation et de l’autre l’accessibilité d’une offre d’activité physique adaptée dépend de la compétition des moyens. Le « sport-santé » apparaît comme le résultat d’une adéquation réussie entre une demande et une offre sportive adaptée. Suivant cette approche, les inégalités sociales de santé sont traitées en référence à un modèle redistributif. Or les travaux actuels permettent d’envisager d’autres solutions qui reposent sur la reconnaissance des usagers. La participation citoyenne à la co-construction de l’offre sport-santé devrait permettre de traiter les injustices épistémiques qui fondent en partie les inégalités sociales. L’article développe quelques pistes permettant d’utiliser le sport-santé pour innover des actions préventives en phase avec la démocratie sanitaire.
De la spécialisation précoce au développement du burn-out chez les jeunes sportif·ves
Authors: Isoard-Gautheur Sandrine
Published: March 2024

L’objectif de cet article est d’exposer les éléments présentés lors du colloque « Des critiques du sport : controverses interdisciplinaires » (Strasbourg, 4-5 novembre 2021). Le Modèle développemental de la participation sportive (MDPS ; Côté, 1999 ; Côté et al ., 2007) présente les caractéristiques des programmes sportifs qui favorisent la participation continue et le développement personnel des jeunes sportif·ves. Ce modèle a permis d’identifier les conséquences négatives de la spécialisation précoce, en particulier le burn-out sportif (Isoard-Gautheur et al ., 2016). Ce dernier peut être conceptualisé comme un syndrome comportant trois dimensions interreliées mais distinctes : le sentiment d’accomplissement réduit, l’épuisement physique et les sentiments négatifs envers le sport (Isoard-Gautheur et al ., 2018). Gustafsson, Kenttä et Hassmén (2011) ont proposé un modèle intégrateur et explicatif du burn-out sportif. Ce modèle a permis d’identifier les antécédents majeurs, les signes précurseurs, les conséquences du burn-out et les facteurs liés à la personnalité, aux stratégies de coping et à l’environnement qui pourraient être considérés comme des antécédents et/ou des modérateurs. Dans ce modèle, le cumul du rôle de sportif·ve et d’élève a été identifié comme un antécédent potentiel du burn-out chez les jeunes sportif·ves. La présentation de ces différents éléments théoriques et empiriques permettra de proposer des pistes d’intervention pour la prévention du burn-out sportif chez les jeunes sportif·ves.
Sequential adaptive switching time optimization technique for maximum hands-off control problems
Authors: Lin Sida , Meng Lixia , Yuan Jinlong , Wu Changzhi , Li An , Liu Chongyang , Xie Jun
Published: March 2024

In this paper, we consider maximum hands-off control problem governed by a nonlinear dynamical system, where the maximum hands-off control constraint is characterized by an $ L^{0} $ norm. For this problem, we first approximate the $ L^{0} $ norm constraint by a $ L^{1} $ norm constraint. Then, the control parameterization together with sequential adaptive switching time optimization technique is proposed to approximate the optimal control problem by a sequence of finite-dimensional optimization problems. Furthermore, a smoothing technique is exploited to approximate the non-smooth maximum operator and an error analysis is investigated for this approximation. The gradients of the cost functional with respect to the decision variables in the approximate problem are derived. On the basis of these results, we develop a gradient-based optimization algorithm to solve the resulting optimization problem. Finally, an example is solved to demonstrate the effectiveness of the proposed algorithm.
The impact of research on health education/health literacy on policymaking in Latin America and the Caribbean Region
Authors: Vílchez-Román Carlos , Paucar-Caceres Alberto , Quispe-Prieto Silvia
Published: March 2024

Background

In this study, we addressed the gap between health research and policymaking in Latin America and the Caribbean (LAC), focusing on health education/health literacy. Despite growing research, translating findings into effective policies needs to be improved. We explored the factors that make research on health education and health literacy to be referenced and mentioned in policy documents in LAC (and in Peru). We proposed a model based on the hypothesis that the relationship between research and policymaking depends on the research strength of scientific evidence, timing, and social media activity.

Methods

A mixed-methods approach was employed, combining quantitative and qualitative data analysis. Quantitative data sources included multidisciplinary databases, altmetric data, and citations of policy documents. For data analysis, we obtained descriptive statistics to identify patterns and then verified the association between variables using χ2. The negative binomial regression was used to test the empirical model introduced above. Quantitative analysis was complemented by analysis of responses to a set of open questions from a sample of Peruvian health policymakers.

Results

We found that timing, strength of evidence, and social media activity were significant predictors of research cited in policy documents. Policy documents tended to rely more on qualitative evidence. A positive correlation between timing and cites in policy documents highlighted the importance of timely dissemination, whereas social media activity, while having an impact, had a relatively minor effect. Peruvian policymakers' responses emphasized the role of political context, the relevance of results, and policymakers' commitment to incorporating research into policies.

Conclusion

Strength of evidence, social media engagement, and publication timing are key predictors of citations for health education/literacy research in LAC policy documents. However, qualitative findings highlight challenges, including some distrust in research findings, together with limited access to relevant research. The findings offer opportunities to enhance evidence-informed health education/health literacy policy decisions.

Implications

To increase the influence on health policymakers, researchers should prioritize the timely dissemination of solid evidence, considering both traditional and digital platforms. Policymakers should focus on the quality and relevance of evidence when formulating policies.
Professional Development for Primary School Teachers Intended to Promote Students’ Spatial Ability
Authors: Bufasi Ergi , Cakane Ildze , Dudareva Inese , Namsone Dace
Published: March 2024

Professional development (PD) plays a crucial role in equipping teachers with the necessary knowledge and skills to effectively foster spatial ability among their students. This study aimed to explore the potential of action research as a PD mode for primary school teachers to enhance students’ spatial ability. The findings of this study indicate the positive impact of PD on teachers’ practice, leading to significant improvements in student performance and engagement. The PD program effectively equipped teachers with new knowledge and skills, leading to noticeable progress in their instructional approaches and teaching practices. This research provides a foundation for future studies on PD programs aimed at enhancing students’ spatial ability.
Improving Data Delivery in Unreliable Networks Using Network Coding and Ant-Colony Optimization
Authors: Afolabi Akindele Segun , Umar Momohjimoh Onuchi , Akinola Olubunmi Adewale
Published: March 2024

Wireless Sensor Networks (WSNs) comprise interconnected wireless nodes that receive and transmit data across applications and platforms. This paper addressed the problem of link failures in WSNs that potentially could lead to the loss of data packets while still in transit. This was achieved through the use of network coding which is known to address capacity bottleneck problems in WSNs. In particular, a technique called Ant Agent-Assisted Network Coding (AAANC) is proposed that employs the ant colony optimization technique in addition to network coding operations. The main aim of AAANC is to facilitate the successful delivery and decoding of coded data packets in the presence of link failures. AAANC employs a packet route selection technique that is inspired by the social behavior of natural ants. For natural ants, a strong pheromone trail along a path indicates a promising route to a food source, and this is analogous to a reliable communication link for routing data packets in this paper. Through simulations, AAANC was compared to diagonal pseudorandom network coding (DNC) and triangular pseudorandom network coding (TNC), and it proved to have a superior performance in terms of packet delivery ratio and number of decoded packets. Significant performance gain can be achieved if AAANC algorithm is made to dynamically adapt the ant colony and network coding parameters in response to traffic changes.