bluuebunny/crossref_metadata_2025_split huggingface dataset:
Determining patterns in the influence of the number of blades in the ducted and unducted propfans on propfan thrust
Authors: Denysiuk Olesia , Kravchenko Igor , Balalaieva Kateryna , Balalaiev Anton , Mitrakhovych Mykhailo 
Published: May 2023

The efficiency of an aircraft engine is estimated by many parameters, one of which is the thrust force. Improving the efficiency of aircraft engines is an important task for engine building. However, questions remain regarding the effect of the number of blades on the change in the thrust of the ducted and unducted fans. In this work, the object of study is a propfan. 3 variants of the propfan with 8, 10, and 12 blades were investigated. The study was conducted by the method of numerical experiment. The aim of the work was to compile recommendations for choosing the number of blades in the ducted and unducted fans for motors with an ultra-high bypass ratio. That could make it possible to improve the efficiency of an aircraft engine with a propfan. Studies have shown that the number of blades in a propfan significantly affects the thrust force that it creates, as well as efficiency. With an increase in the blades of the ducted fan from 8 to 12, the thrust force increases to 38 %. With an increase in the blades of the propfan from 8 to 12, the thrust force increases to 36.9 %. An increase in the blades from 8 to 12 in the ducted fan leads to an increase in its performance, thereby improving efficiency by 2.4–5.7 %. When flowing around a propfan, it is possible to note the peculiarity that occurs when all three variants are streamlined – vortex traces of the blades in the peripheral parts. Visualization of current lines when flowing around an unducted fan with 8, 10, and 12 blades demonstrates a similar flow character. On the periphery, there are zones of higher speed but there are no zones with eddy formations. The resulting regularities of the influence of the number of blades on a change in the thrust of the ducted and unducted fans could improve the efficiency of the aviation power plant with an engine whose bypass ratio is ultra-high.
Development of technology of crackers wuth increased food value to improve the food supply to military servants during a special period
Authors: Tsykhanovska Iryna , Tovma Lidiіa , Yevlash Victoria , Lazarieva Tetiana , Blahyi Olga , Alexandrov Alexandr , Riabchykov Mykola , Svidlo Karyna , Korolyova Natalia , Gontar Tatyana 
Published: May 2023

Flour confectionery products have an unstable polyphase structure that needs stabilization. The nutrient composition of these products is characterized by a high content of sugar and saturated fatty acids. The content of protein, dietary fiber, vitamins, and minerals is low. This predetermines the feasibility of using the latest raw materials. This paper has proven the possibility of using flour from extruded sunflower seed kernels (FESSK). FESSK is a unique protein-mineral raw material ingredient that contains essential amino and polyunsaturated fatty acids, as well as biologically active substances.
In FESSK, compared to high grade wheat flour (HGWF), the content of protein increases by 3.1–3.3 times; minerals – 13.80–13.82 times; fiber – 98.91–98.93 times; fat – 2.54–2.56 times; the total amount of essential amino acids – by 3.15–3.19 times. One should note the balance of amino acid composition and the usefulness of FESSK proteins (amino acid number (AAN) of essential amino acids approaches 100 %). Compared to HGWF, FESSK has increased biological value index and utilization rate of amino acid composition, by 48.74 % and 39.29 %, respectively. Of the 13 vitamins necessary for the human body, 12 vitamins (92.3 % of the total amount of vitamins) were identified as part of the FESSK composition. In FESSK, compared to HGWF, fat-absorbing capacity increases by 1.50–1.52 times and water retention capacity by 3.62–3.64 times.
It was found that the addition of 10.0 % FESSK increases wettability by 6.58–11.19 %; expansion rate by (1,0±0,1) %; ash content – 5.71–13.33 times; fat content by 2,19–6,17 %; protein content by 8.29–21.37 %. The integrated quality indicator increases by 5.1–6.8 %. Alkalinity decreases by 1.04–2.06 %. The expediency of the production of crackers with improved nutritional properties to improve the food supply of servicemen in a special period has been proven.
Determination of rational parameters of a device for leather feeding to the machining area
Authors: Bahadirov Gayrat , Musirov Makhmarajab , Nabiev Ayder 
Published: May 2023

The quality of mechanical processing of the skin largely depends on the parameters of the skin feeding to the processing zone between the working rolls. The processed material at the entrance to the processing zone must be free of folds and wrinkles, i.e. one layer of material should enter the processing zone of the working rolls. Therefore, the input of the processed material into the zone of the working rolls is ensured with a rational selection of the profile of the guiding device for feeding the skin into the processing zone. A mathematical model was developed that allows the authors to determine the profile of the guiding device for leather feeding into the processing area between the working rollers, considering the modulus of elasticity and the density of the material being processed. The graphical solution to the mathematical model of the guiding device profile was made by a numerical method, and in order to prevent the leather saturated with liquid from sticking to the guiding surface, the friction coefficient was replaced with the rolling friction coefficient, and the rollers of the guiding device were placed at a certain angle to level out the folds of the leather and smoothly feed it to the processing area. A new design of roller technological machines was manufactured in laboratory settings. The roller machine is equipped with a new guiding device using rollers, with the possibility of free rotation around its axis. The rollers can be placed in several rows in a staggered arrangement. The developed design of the guiding device, due to the installation of the rollers at a certain angle relative to the direction of skin feed, makes it possible to smoothly transport the treated skin while eliminating longitudinal and transverse folds. The elimination of wrinkles contributed to an increase in the usable area of the treated leather samples. Experimental and testing work was conducted on a roller squeezing machine for processing leather samples using a new design of guiding device. The working width of the guiding device was 1500 mm, and the rollers of a diameter of 30 mm, allowed the straightening of the folds of the leather and moving it to the gripping zone of the working rollers. In the experimental study, the second-order D-optimal planning method was used with the Kano design matrix.
The optimization of cargo delivery processes with dynamic route updates in smart logistics
Authors: Danchuk Viktor , Comi Antonio , Weiß Christian , Svatko Vitalii 
Published: May 2023

The object of research is the processes of transport logistics management under the influence of non-stationary factors of different nature on the functioning of street-road networks (SRN) in cities. The task of dynamic routing at large and variable loading of SRN sections is solved by managing the processes of cargo delivery in real time within the framework of the implementation of the Smart Logistics concept.
Simulation studies of cargo delivery routing with dynamic real-time route updating using a modified ant colony algorithm and data on the dynamics of traffic flow (TF) were conducted using an SRN in the city of Kyiv as an example. Here, experimental data were obtained using motion sensors of intelligent transport systems. During the optimization, current data were used acquired online within the framework of the Internet of Things technology, as well as historical data obtained over past periods of time and averaged using Big Data (BD) technology. Route optimization at each stage of real-time updates was achieved using a modified ant colony algorithm. This method has a sufficiently high optimization performance and makes it possible, unlike many other intelligent methods, to directly take into account the non-stationary dynamics of TF within SRN. It is shown that the use of properly averaged BD historical data allows for more efficient planning of transport routes.
The simulation studies indicate the possibility of using the proposed approach by transport companies and authorities to solve the problems of managing logistics flows in an automated mode under conditions of complex, unpredictable traffic
Determination of the fatigue behavior of the composite Single-Stringer structure based on the quasi-static method
Authors: Shomran Ali Talib , Faisal Batool Mardan , Hussein Emad Kamil , Santos Thiago , Fatima Kies 
Published: May 2023

In this investigation, the Mechanical Behavior of the composite Single-Stringer structure was subjected to numerical analysis in order to better understand its properties. As the primary material for the modeling process, the carbon-epoxy IM7/8552 with quasi-isotropic Layups has been utilized. The outcomes of the numerical analysis that were carried out on the structure while it was in its static state have been put into the structural tool that was developed by the ANSYS programme. The fundamental boundary conditions have been defined on the basis of the information that was received from the testing. Static forces with a combined magnitude of 13.7 kN are being applied to the composite Single-Stringer structure. Shear stresses, direction deformation, von mises stresses, and total deformation have all been shown to have an effect on a material's mechanical behaviour, and this effect has been demonstrated. The calculations indicate that there is a maximum amount of bending that can take place as a direct result of the load that is being applied, and that amount is equal to 0.0147. The maximum amount of bending that can take place as a direct result of the load that is being applied is equal to 0.0147. As a consequence of the application of 13.7 kN of pressure, the von Mises stress, which is also frequently referred to as comparable stresses, has reached 51.9 MPa. Shear stresses have been estimated in three distinct plans, and it was discovered that the shear stress that was applied to the XY plane achieved a maximum of 15 MPa, but the shear stress that was applied to the XZ plane reached a maximum of 9.8 MPa. This was found. Both aeroplanes were put through precisely the same amount of tension at the exact same time. At this time, the shear stress on the plane YZ has reached a level of 1.5 MPa.
Determination of fire protection distances during a tesla model s fire in a closed parking lot
Authors: Gavryliuk Andrii , Yakovchuk Roman , Chalyy Dmytro , Lemishko Mykhailo , Tur Nazarii 
Published: May 2023

This study modelled an electric vehicle fire on the example of a Tesla Model S (USA) in a closed car park. Such fires pose an increased danger due to their rapid spread, the presence of a large number of vehicles, the release of toxic combustion products and heavy smoke. In fact, the rapid spread of a fire in a closed car park is caused by unreasonably small distances between vehicles. Thus, the purpose of the study was to determine the minimum fire protection distances due to an electric vehicle fire in a closed car park using the example of Tesla Model 3.
For this purpose, the objects and their physical characteristics were described, input and environmental parameters were set, and a mathematical model of the dynamics of fire development was formed. This made it possible to establish the minimum fire protection distance during the free development time of 610 s for an electric vehicle fire in a closed car park, which is 10 m along the flank and 6 m along the front. The difference in fire protection distances on the flank and front is explained by the design features of the electric vehicle. That is, the flank area of the flame will be larger than the front of the burning electric vehicle, and therefore the heat radiation power will also be greater. The actual heat radiation power is the key factor affecting fire protection distances.
The results of the study can be used in the design of various types of car parks and the safe placement of vehicles in them. Fire protection distances between cars in enclosed car parks can be taken into account by insurance companies when assessing the risk of damage to cars due to fires. And also by fire and rescue units involved in extinguishing such fires, to ensure the safety of rescuers
Harris Hawks optimization for ambulance vehicle routing in smart cities
Authors: Hussein Taha Darwassh Hanawy , Frikha Mondher , Rahebi Javad 
Published: May 2023

The ambulance routing problem is one of the capacitated ambulance routing problem forms. It deals with injuries and their requests for saving. Therefore, the main aim of the ambulance routing problem is to determine the minimum (i.e., optimum) required distances of between:
1) accident places and the ambulance station;
2) the location of the nearest hospital and the accident places.
Although of the efforts proposed in the literature, determining the optimum route is crucial. Therefore, this article seeks to tackle ambulance vehicle routing in smart cities using Harris Hawks Optimization (HHO) algorithm. It attempts to take the victims as quickly as possible and confidently. Several engineering optimization problems confirm that HHO outperforms many well-known Swarm intelligence approaches. In our system, let’s use the node approach to produce a city map. Initially, the control station receives accident site information and sends it to the hospital and the ambulance. The HHO vehicle routing algorithm receives data from the driver; the data includes the location of the accident and the node position of the ambulance vehicle. Then, the driver’s shortest route to the accident scene by the HHO. The locations of the accident and hospital are updated by the driver once the car reaches the accident site. The fastest route (which results in the least travel time) to the hospital is then determined. The HHO can provide offline information for a potential combination of the coordinates of destination and source. Extensive simulation experiments demonstrated that the HHO can provide optimal solutions. Furthermore, performance evaluation experiments demonstrated the superiority of the HHO algorithm over its counterparts (SAODV, TVR, and TBM methods). Furthermore, for ten malicious nodes, the PDF of the algorithm was 0.91, which is higher than the counterparts
Conservación y protección del patrimonio histórico-artístico en Úbeda (Jaén). Los inicios del siglo XX
Authors: Almansa Moreno José Manuel 
Published: May 2023

The architectural heritage of Úbeda (Jaén) has been the subject of numerous interventions throughout the 20th.-21th. centuries, especially highlighting the actuation carried out by the architects of the General Directorate of Fine Arts (Ministry of Culture) and the Council of Culture and Historical Heritage of Junta de Andalucía.
With this text we try to delve into the first interventions carried out in the city at the beginning of the 20th. century, analyzing the projects of architects such Antonio Flórez Urdapilleta, Luís Berges Martínez or Leopoldo Torres Balbás, who would act in monuments like as the Hospital de Santiago or the Church of Santa María de los Reales Alcázares. In the same way, will be analyzed some of the measures proposed at this time aimed at combating the plundering and destruction of historical heritage.
Carne, espejos y aceptación en los años noventa: un estudio comparativo de videoarte y poesía del contexto vasco.
Authors: Luengo Aguirre Maite 
Published: May 2023

At the end of the 1990s, artistic expressions criticizing the beauty canons directed at women arose in the Basque context. In this article, we make a comparative reading of two works created following this line, which has been little researched so far. These creations are the video A mi manera (2) by the artist Estíbaliz Sádaba recorded in 1999 and the poem Notas de las ansias 2, written in 2000 by the author Miren Agur Meabe. Through this study, the common themes and languages employed, both visually and in writing, are analysed in order to contribute to the understanding of the position shared by the authors on the canons of beauty of the time.
Amarillos, blancos y chinos. Discursos y prácticas de racialización y xenofobia sobre población de origen japonés en Perú
Authors: Melgar Tísoc Dahil M. 
Published: May 2023

En el presente artículo analizo el uso político de los principales discursos racializadores sobre población de origen japonés en Perú, centrándome en tres momentos. Como punto de partida, discuto el desarrollo de los discursos sobre la amarillitud y la blanquitud de los japoneses, así como las narrativas sobre el peligro amarillo en vinculación con la implementación y regulación de políticas inmigratorias que alentaron, regularon y proscribieron el desplazamiento y permanencia de esta población en Perú entre los siglos xix y primera mitad del xx. Estos discursos y narrativas representaron ideas y biopolíticas que fueron replicadas de manera hemisférica en distintos Estados-nación en el continente americano. Del mismo modo, reviso algunas de las manifestaciones más extremas de este fenómeno: por un lado, las políticas de desnacionalización de peruanos de origen japonés y, por el otro, aquellas que legalizaron su concentración en los Estados Unidos en el contexto de antesala y desarrollo de la Segunda Guerra Mundial. Finalmente, revisito estos discursos racializadores a la luz de algunos ejemplos contemporáneos (finales del siglo xx, principios del xxi), centrados, en la figura de Alberto Fujimori. Al respecto, me detendré únicamente en el uso afectivo que este candidato empleó de una categoría racializadora (chino), bajo la cual él se autodenominó ante sus votantes; así como su enunciación en algunas de las manifestaciones públicas de apoyo y oposición a su candidatura y mandato.
Años de vida perdidos y distribución espacial de la mortalidad por incidente vial en Medellín, 2010-2020
Authors: Salazar Henao Edwin , Cabrera Arana Gustavo Alonso 
Published: May 2023

Objetivo: Estimar los años potenciales de vida perdidos y la distribución espacial de la mortalidad por incidente vial según modo de transporte en Medellín 2010-2020, como línea base para la implementación de la estrategia Visión Cero, de la Organización Mundial de la Salud, en la movilidad de la ciudad.
Metodología: Estudio retrospectivo y descriptivo de corte transversal, con fuente secundaria. El cálculo de los años potenciales de vida perdidos se hizo tomando como edad límite la esperanza de vida al nacer de Colombia, según año y género. El análisis espacial se realizó a partir de la dirección del incidente; la representación de la densidad de Kernel fue por el método de clasificación estándar-cuantil, y las zonas de influencia se crearon por el método búfer de anillos múltiples, con distancias de 500 y 1000 metros.
Resultados: Medellín, entre 2010 y 2020, registró 2988 muertes por incidente vial. Quienes más murieron fueron los peatones, con 1423 (47,6 %) muertes, seguidos por los motociclistas, con 1295 (43,3 %). Los años potenciales de vida perdidos fueron 98 787. Las comunas de mayor concentración en muerte de peatones fueron: Candelaria, Buenos Aires y Manrique; en motociclistas, la mayor concentración se evidenció en el sistema vial del río. Por zonas de influencia, los peatones fallecidos en un radio de 1000 metros del sistema vial del río fueron 688 (49,8 %), y los motociclistas, 636 (52,2 %).
Conclusión: Los motociclistas fueron quienes murieron más jóvenes y más años dejaron de vivir. Politraumatismos son diagnósticos constantes de muerte, pero lesiones en cabeza, cráneo y tórax son más letales en peatones y motociclistas.
Pengaruh Penambahan Tepung Ceker Ayam pada Ransum terhadap Produktivitas Kambing Peranakan Etawa
Authors: Dzarnisa Dzarnisa , Rachmadi Didy , Muarif Muhammad Al 
Published: May 2023

ABSTRACT. Penelitian ini dilakukan untuk mengkaji pengaruh penambahan tepung ceker ayam dengan persentase berbeda pada ransum terhadap produktivitas kambing Peranakan Etawa. Rancangan penelitian yang digunakan dalam penelitian ini adalah rancangan acak kelompok yang terdiri dari 5 perlakuan dengan 3 kelompok kambing yang dikelompokkan berdasarkan berat badan. Perlakuan terdiri dari R0 (kontrol tanpa penambahan tepung ceker ayam), R1(penambahan tepung ceker ayam sebanyak 2,5%), R2 (penambahan tepung ceker ayam sebanyak 5%), R3 (penambahan tepung ceker ayam sebanyak 7,5%) dan R4 (penambahan tepung ceker ayam sebanyak 10%). Parameter pada penelitian ini meliputi produksi susu, pertambahan bobot badan, volume ambing, dan konsumsi pakan. Tahapan penelitian dimulai dari tahap persiapan, tahap pemeliharaan, dan tahap pengambilan data. Data yang telah diperoleh di analisis dengan metode analisis sidik ragam (Anova). Hasil penelitian memperlihatkan bahwa penambahan tepung ceker ayam pada perlakuan R2(5%) meningkatkan konsumsi pakan dan berpengaruh terhadap produksi susu dan juga kelompok dari pertambahan berat badan, tetapi tidak berpengaruh terhadap volume ambing. (Effect of addition chicken claw flour with different percentage on rations to productivity of PE goats) ABSTRAK. This research was conducted to examine the effect of adding chicken claw flour with different proportions on the productivity of Etawa crossbreed goats. The research used in this study was a randomized block design consisting of 5 treatments and 3 groups of design based on body weight. The treatments consisted of R0 (control without adding chicken claw flour), R1 (addition of chicken claw flour as much as 2.5%), R2 (addition of chicken claw flour as much as 5%), R3 (addition of chicken claw flour as much as 7.5 %) and R4 (addition of chicken claw flour by 10%). Parameters in this study include milk production, body weight gain, udder volume, and feed consumption. The research stages start from the preparation stage, the maintenance stage, and the data collection stage. The data that has been obtained were analyzed using the method of analysis of variance (Anova). The results showed that the addition of chicken claw flour in treatment R2 (5%) increased consumption and affected milk production and also the group of weight gain, but had no effect on udder volume.
KATALIS BIMETAL Cu-Cr/DIATOMEA UNTUK HIDROGENASI MINYAK SAWIT
Authors: Husin Husni 
Published: May 2023

A series of bimetallic Cu-Cr supported onto diatomite was synthesized using impregnation method and characterized using X-ray diffractometer (XRD) technique. The catalyst compositions were CuCrO2, Cu2O, Al2O3 and SiO2. The catalyst contained 5, 10, 20, and 30 wt.% of Cu-Cr respectively, with Cu : Cr ratio of 1:1. The catalytic performance of the samples was evaluated based on the application to a hydrogenated palm oil at 70oC and 7 bar of pressure by measuring its iodine number. The result showed that the bimetallic Cu-Cr deposited onto diatomite was an effective catalysts for hydrogenation of palm oils and its catalytic activity was highly dependent on the composition of metals. Iodine number of palm oil decreased to 27.2 from 43.28 by using of 30 wt.% of Cu-Cr after 120 minutes reaction almost similar to the performance of commercial nickel catalyst that could decrease the iodine number to 26.1. Keywords: hydrogenation, palm oil, copper-chromium, diatomite, impregnation.