bluuebunny/crossref_metadata_2025 huggingface dataset:
Geochemistry and Sources Apportionment of Major Ions and Dissolved Heavy Metals in a Small Watershed on the Tibetan Plateau
Authors: Xing Wencong , Wei Lai , Ma Wenmin , Li Jun , Liu Xiaolong , Hu Jian , Wang Xiaoxia
Published: November 2022

Due to environmental sensibility and fragility, the water chemistry revolution and heavy metals accumulation influenced by natural and anthropogenic processes in the rivers on the Tibetan Plateau have recently become a global concern. However, targeted studies in small watersheds on the Tibetan Plateau are relatively limited. A study of surface waters in Duilong Qu (DLQ), a small watershed located on the Tibetan Plateau, have been conducted to assess the impact of natural and anthropogenic activities on the water environment of the DLQ by analyzing the major ions and heavy metals (Cd, Cr, Mn, Fe, Ni, Cu, Zn, Pb, and As) in the river waters. The results of the analysis of major ions showed that SO42− and HCO3− were the dominant anions and Ca2+ was the dominant cation, indicating that the water chemistry of the river waters was mainly of the HCO3-Ca type. The results of Piper diagram and Gibbs diagram analysis indicate that the water solute is mainly controlled by the weathering of carbonate rocks, followed by the influence of geothermal water confluence. Compared to the world river average, the concentrations of Cr, Pb, and As in the studied rivers were relatively high. The heavy metal concentrations satisfy the standards of WHO and GB (Chinese national standard) guidelines. The PCA-APCS-MLR model has been employed and evidenced as a reliable tool to identify the sources of the heavy metals in this study. The results revealed that the heavy metals in the DLQ are caused by natural sources, geothermal water, and mining operations. The primary sources of As (93.63%), Cr (93.07%), Mn (73.53%), Fe (59.54%), and Pb (58.28%) in the DLQ were geothermal water, while Zn (91.41%), Mn (20.67%), Fe (40.46%), and Pb (26.15%) originated mainly from natural sources. Additionally, Cu (91.41%) was primarily influenced by mining operations, and Ni originated from mining (53.61%) and geothermal water sources (46.39%), while Cd (97.88%) originated from unknown sources. In the high-flow season periods from 1992 to 2017, the As concentrations in the DLQ decreased significantly, which might result from increasing precipitation and runoff. Overall, the results of this study suggest that both natural and anthropogenic activities have jointly affected the solutes in small rivers on the Tibetan Plateau, and heavy metal pollution should be emphasized in the future.
Toxic Effects and Mechanism of Pefloxacin on the Early Life Stage of Zebrafish (Danio rerio)
Authors: Shen Rong , Yu Yichang , Liu Qinfang , Wang Ruili , Lan Rong , Feng Hui , Yu Ran , Jin Lihua , Li Ye
Published: November 2022

Pefloxacin (PFLX) is a type of fluoroquinolone (FQ) that has been widely used in aquaculture and animal husbandry. It is also a new kind of pseudo-persistent pollutant, which has some toxic effects. In this study, zebrafish (Danio rerio) embryos were used as exposure models to analyze the toxicity of PFLX. The results showed that PFLX was absorbed on the outer membrane surface at the beginning, and then a few PFLX slowly entered the cytoplasm. The adsorption complied with the Langmuir isotherm adsorption model. The surface morphology of the embryonic membrane was changed. PFLX exposure had no effect on fetal autonomous movement, but it significantly inhibited the embryo hatching rate. After PFLX exposure, the embryo and larval survival rates showed a clear dose–effect relationship. Though PFLX exposure did not cause teratogenic toxicity, it still affected cardiovascular function. The potential toxicity mechanism and developmental toxicity of PFLX to zebrafish were revealed. These results could be important for studies concerning FQ toxicology.
Methodological Guide to Forensic Hydrology
Authors: Gutierrez-Lopez Alfonso
Published: November 2022

In Latin America and the Caribbean (LAC) region, geophysical, meteorological and hydrological disasters are increasing every year. With significantly limited resources, these countries are naturally forced to absorb lessons from these disasters. One of the fundamental activities during this learning task remains the need to standardize the forensic reporting process. Like all academic disciplines, engineering is exceptional in its application to the forensic field. This feature makes it a unique input to the investigation of hydrological and environmental catastrophes. Based on the fundamental concepts of forensic investigation, ten principles for properly conducting forensic hydrology studies are proposed. The ten principles proposed are: (i) Principle of use, (ii) production, (iii) principle of exchange, (iv) recognition, (v) correspondence, (vi) reconstruction, (vii) principle of probability, (viii) uncertainty, (ix) principle of certainty, and (x) conclusion principle. A hypothetical case of urban infrastructure failure is used to explain, in detail, each of the proposed principles. This paper proposes a methodology to be considered as a reference point for a forensic hydrological analysis to be used at the LAC region.
Synthesis, Characterization, and Application of Pt/PtO2-TiO2/SiO2 Materials on a Continuous Flow Packed Bed Microreactor for Enhanced Photocatalytic Activity under Sunlight
Authors: Gusmão Carolina de Araújo , Borges Laura Teixeira , Palharim Priscila Hasse , Otubo Larissa , Rodrigues Orlando , Gouvea Douglas , Ramos Bruno , Teixeira Antonio Carlos Silva Costa
Published: November 2022

The present work aimed at the development of Pt-TiO2/SiO2 materials applied to the degradation of a pharmaceutical pollutant in a fixed-bed microreactor in continuous mode. First, a wide investigation of the optimal platinum content in TiO2/SiO2 was carried out based on extensive characterization through XRD, DRS, SEM, TEM, and XPS techniques. For the content range studied, no significant changes were observed in the crystallinity of the material, with peaks related to the anatase phase and PtO2 in the diffractograms. SEM images combined with EDS spectra indicated the presence of platinum and a large heterogeneity in the particles. MET analyses showed PtO2 nanoparticles in close contact with TiO2, allowing the formation of a type II heterojunction. XPS showed platinum in the 0 and +4 oxidation states, suggesting that platinum metal and PtO2 are both present. Regarding the degradation experiments, the optimal catalyst achieved 81% degradation of acetaminophen for a residence time of 1 h, while the catalyst without platinum reached only 27% degradation. The catalyst activity dropped from 81 to 57% in 2 h and remained stable for six reuse cycles. Increasing the inlet flow rate and concentration reduced the pollutant degradation although there was an increase in the reaction rate. Finally, a photocatalytic mechanism was proposed in which a type II heterojunction was developed, with generation of hydroxyl radicals by the positive holes in the VB of TiO2 as well as superoxide radicals by the electrons in the CB of PtO2.
Stability of Braced Excavation Underneath Crossing Underground Large Pressurized Pipelines
Authors: Li Fangang , Guo Panpan , Geng Ningning , Mao Lei , Lin Feng , Zhao Yanlin , Lin Hang , Wang Yixian
Published: November 2022

The practice of deep-braced excavation in congested urban environments involves frequently buried pipelines, which can exert a significant effect on the performance of the excavation. The objective of this paper is to investigate the performance of a 12.5-m-deep-braced excavation spanned by two shallowly buried large-diameter pressurized pipelines. A suspension structure is installed within the excavation to protect the in situ pipelines during the construction. The excavation performance is investigated by performing a three-dimensional finite element analysis. The finite element method is verified based on the observations at the site. The results indicate that, as expected, the excavation support structures displace together with varying degrees of deformation toward the excavated area. The strut shear forces are found to be distributed axially in linear manners, while the strut bending moments are in symmetric manners. The benefit of using the proposed pipeline suspension structure is demonstrated. By using this structure, pipeline deformation can be well controlled, and the structural integrity and safety of the pipelines can be ensured. This benefit depends on the convenient operation in that the elevation of the cork base of the pipeline suspension structure is stably lowered during the construction process.
Predicting Ground Surface Settlements Induced by Deep Excavation under Embankment Surcharge Load in Flood Detention Zone
Authors: Wang Yixian , Chen Shi , Ouyang Jiye , Li Jian , Zhao Yanlin , Lin Hang , Guo Panpan
Published: November 2022

In this paper, a simplified prediction formula of ground settlement induced by deep foundation pit excavation is proposed, especially suitable for ground overloading near a foundation pit, such as embankment surcharge load, which is carefully considered via the means of load equivalence. The ground settlement induced by foundation pit excavation and embankment surcharge load is determined by the modified skewness prediction formula and the simplified Boussinesq solution, respectively, and it is assumed that no coupling effect exists between the two settlement sources. In addition, this paper improves the determination of the maximum settlement location by combining calculus and curve fitting, replacing the existing prediction formula which relies heavily on engineering experience to determine the maximum settlement point. The predicted value obtained using this method comes close to the measured value, and the deviation of the maximum surface settlement value is controlled within about 5% in the three cases introduced, of which the accuracy is higher than the existing prediction formula.
Relative Growth of Lettuce (Lactuca sativa) and Common Carp (Cyprinus carpio) in Aquaponics with Different Types of Fish Food
Authors: Byrd George Vernon , Jha Bibhuti Ranjan
Published: November 2022

Aquaponics has the potential to contribute to food security in urban Nepal, where agricultural land near cities is rapidly being converted for other uses. This technology’s use is expanding in Nepal, but the relatively high cost of commercial fish food is a hindrance. As a result, some aquaponics operators are resorting to alternative, less expensive fish foods. Since the primary input of nutrients to the plants grown in aquaponics comes from the fish food, an evaluation of the impact of fish foods on plant and fish growth is needed to help operators evaluate the costs and benefits of commercial compared to alternative fish diets. This study evaluated the growth of lettuce and common carp, the most common species of plant and fish used in aquaponics in Nepal, with three fish diets (commercial fish food, commercial chicken food, and a homemade diet with mustard oil cake and rice bran) at a commercial aquaponics farm with nine identical systems allowing for three replicates of the three fish food treatments. There were no significant differences in the measurements of lettuce growth (stem length, root length, and stem mass) and few differences in nutrient concentrations in leaf tissue. The specific growth rate of the carp fingerlings was lowest for the fish in the systems fed with the homemade diet (0.21) compared to those fed commercial fish food or commercial chicken food (0.31 and 0.28, respectively). These findings suggest that aquaponics operators who have been buying the more expensive commercial fish food with fish meal as its protein source can save 50–95% of the related costs by using commercial chicken food or the homemade diet defined in this study. This could potentially encourage the expansion of aquaponics systems in Nepal.
Flood Scenario Simulation, Based on the Hydrological and Hydrodynamic Model in the Puyang River Catchment
Authors: Zhong Hua , Zhang Bing , Ma Ting , Qi Xinlong , Wang Xuying , Shang Hualing , Qu Simin , Fang Weihua
Published: November 2022

The topography of the Puyang River catchment is complex and includes hills and plains. The Zhuji basin in the middle reaches a densely populated area facing serious flooding issues, due to the upstream flooding and downstream backwater. To address the problem, this study applies the Xin’anjiang hydrological model and IFMS 1D-2D hydrodynamic model, to simulate flood scenarios. The simulation results demonstrated that the hydrological model and the -hydrodynamic model together are a feasible tool to monitor the flooding process in the Puyang River catchment. In addition, different flood scenarios which consider disaster-inducing factors and flood control operations are simulated by the model. Reasonable solutions are analyzed for the local flood management.
Saturated Hydraulic Conductivity Estimation Using Artificial Intelligence Techniques: A Case Study for Calcareous Alluvial Soils in a Semi-Arid Region
Authors: Yamaç Sevim Seda , Negiş Hamza , Şeker Cevdet , Memon Azhar M. , Kurtuluş Bedri , Todorovic Mladen , Alomair Gadir
Published: November 2022

The direct estimation of soil hydraulic conductivity (Ks) requires expensive laboratory measurement to present adequately soil properties in an area of interest. Moreover, the estimation process is labor and time-intensive due to the difficulties of collecting the soil samples from the field. Hence, innovative methods, such as machine learning techniques, can be an alternative to estimate Ks. This might facilitate agricultural water and nutrient management which has an impact on food and water security. In this spirit, the study presents neural-network-based models (artificial neural network (ANN), deep learning (DL)), tree-based (decision tree (DT), and random forest (RF)) to estimate Ks using eight combinations of soil data under calcareous alluvial soils in a semi-arid region. The combinations consisted of soil data such as clay, silt, sand, porosity, effective porosity, field capacity, permanent wilting point, bulk density, and organic carbon contents. The results compared with the well-established model showed that all the models had satisfactory results for the estimation of Ks, where ANN7 with soil inputs of sand, silt, clay, permanent wilting point, field capacity, and bulk density values showed the best performance with mean absolute error (MAE) of 2.401 mm h−1, root means square error (RMSE) of 3.096 mm h−1, coefficient of determination (R2) of 0.940, and correlation coefficient (CC) of 0.970. Therefore, the ANN could be suggested among the neural-network-based models. Otherwise, RF could also be used for the estimation of Ks among the tree-based models.
Comparative Analysis on the DMA Partitioning Methods Whether Trunk Mains Participated
Authors: Zhou Hua , Liu Youfei , Yao Huaqi , Yu Tingchao , Shao Yu
Published: November 2022

In recent years, the District Metered Area (DMA) of water distribution networks (WDNs) has become a major development trend in the water leakage control area. It has significant value in the active leakage control and pressure management of WDNs. This study comments on two DMA partitioning methods (Scheme A and B, previously introduced in another paper) and compares three aspects of their respective performances to elucidate their respective strengths and weaknesses. Scheme A partitions all the network nodes, whereas Scheme B only partitions the remaining network nodes, except the trunk mains. Whether the trunk mains participated in the partitioning process is the key distinction between the two approaches. There is little relevant research that compares and analyzes the effects of the above two methods. This paper applies these two types of partitioning methods to a case network. The respective performances in three aspects, namely economy, water quality, and leakage control, were evaluated and compared. For economy, Scheme A is more economical than Scheme B, saving about 15.34%. For water quality, Scheme B is the best partitioning method because it reduces water age better than Scheme A does. For leakage control, Scheme B has a drop of 19.46%, which is better than Scheme A (a decline of 15.12%) in comparison to the initial leakage.
A Dam Construction Event Recorded by High-Resolution Sedimentary Grain Size in an Outflow-Controlled Lake (Hulun Lake, China)
Authors: Gao Hongbin , Zhang Rui , Wang Gang , Fan Yanru , Zhu Xinfeng , Wu Junfeng , Wu Li
Published: November 2022

The distribution of sediment grain size can record past environmental conditions and human activity. In this study, radioisotope of 210Pb and 137Cs and a grain size of a 41 cm core in Hulun Lake were applied to reconstruct the high-resolution sedimentation history. The profiles of the grain size of the lake sediments show that silt (4–63 µm) was the largest contribution with an average content of 84.05%, and the second largest contribution was sand (>63 µm) with an average content of 15.68%. The median grain size and the mean grain size in the whole sediment core was 22.39 μm and 36.85 μm, respectively. Correlations of the sedimentological variables with instrumental measurements were also analyzed. The peak–trough value of the mean grain size of the sediments in Hulun Lake can reflect the magnitude of rainfall intensity and river discharge. The clay and silt contents at a depth of approximately 32–38 cm was different from other depths throughout the core, which showed continuous maxima with an average content of 0.35% and 94.08%. These changes in grain size correspond to the period of dam construction in 1963–1970. Therefore, the sediment grain size of Hulun Lake effectively recorded the dam-building activity.
Study on Waterlogging Reduction Effect of LID Facilities in Collapsible Loess Area Based on Coupled 1D and 2D Hydrodynamic Model
Authors: Mu Jie , Huang Miansong , Hao Xiaoli , Chen Xiaolan , Yu Haijun , Wu Binbin
Published: November 2022

The accurate evaluation method of LID toward the attenuation of urban flood is still a hot issue. This paper focuses on a coupled 1D and 2D hydrodynamic model, investigating the model parameters set in a collapsible loess area, and the changes in the surface runoff, waterlogged area, and drainage network indicators under different rainfall patterns. The results show that the coupled model can effectively simulate the effect of LID facilities under unaltered and retrofitted conditions. It is found that the infiltration parameters in a collapsible loess area are higher than in other eastern cities by calibration and validation. After implementing the LID facilities, the total runoff, peak flood flow, waterlogged area, runoff coefficient, and drainage pressure under different rainfall patterns have all been reduced. With the increases in the rainfall return period, the waterlogging reduction effect of LID facilities would gradually weaken. The rainfall return period has a great impact on the indicators of surface runoff, waterlogged area, and drainage capacity. The coefficient of rainfall peak has a relatively big impact on indicators of pipelines, such as the proportion of overflow nodes, the proportion of fully loaded pipelines, and the average full-load duration. The rainfall duration has a major impact on the total runoff quantity, runoff coefficient, and average full-load duration.
Overburden Failure Associated with Slicing Mining in a Super Thick Coal Seam under Special Weak Aquifers
Authors: Chen Kai , Ge Ying , Liu Zhiqi , Chen Lifeng , Zhang Quan
Published: November 2022

With the increasing improvement of national ecological standards, the eco-environmental problems caused by super thick coal seam mining in western China are becoming more and more serious. The failure law of weak overburden stratum is an important factor affecting the safe mining of coal. The failure characteristics of weakly cemented overburden under high-intensity mining in the mining area of western China were studied. For this purpose, a case study was conducted in the 1101 working face of the Baituyao Coal Mine in Ürümqi County. Based on the analysis of geological conditions in the study area, we combined empirical calculations with engineering analogy, physical simulation, and numerical simulation to comprehensively analyze the characteristics of mining-induced overburden failure. The study showed that the overburden in the study area had several unfavorable engineering geological characteristics, including ease of softening in the presence of water. The Middle Jurassic Xishanyao Formation is a directly recharged aquifer with a weak water-retaining property. Overburden failure mainly occurred at the two ends of the open-off cut. During the mining process, vertical fissures and bed-separated fissures were periodically developed and closed, and the fissures were interconnected. The overburden was fractured, and the fractured zone showed a trapezoidal shape, tapering off from bottom to top. The heights of the caving zone and the water-conducting fracture zone were 25 and 280 m, respectively, in the 1101 working face of the Baituyao Coal Mine, and the ratio of fracturing to mining height was 14.0. Due to the weakly cemented overburden and the presence of the Neogene weak aquifer, the risk of water and sand bursts still exists in this working face under high-intensity mining. Our findings shed light on the safe mining and environmental protection of the ground surface in coal mine shafts in western China.
Smart Digital Signature berbasis Blockchain pada Pendidikan Tinggi menggunakan Metode SWOT
Authors: Rakhmansyah Mohamad , Rahardja Untung , Santoso Nuke Puji Lestari , Khoirunisa Alfiah , Faturahman Adam
Published: November 2022

Validasi dokumen merupakan hal yang sangat penting dalam menyangkut keaslian aset digital pemilik. Dimana validasi dokumen saat ini masih bersifat tradisional dengan mengunjungi tempat tersebut. Namun, saat pandemi proses validasi dokumen tidak dilakukan tatap muka karena pandemi Covid-19. Penelitian ini bertujuan agar penggunaan teknologi tanda tangan digital pintar yang menjamin keamanan dan validitasnya tanpa harus tatap muka. Smart digital signature adalah tanda tangan digital yang terenkripsi dengan RSA-SHA256 berbasis blockchain dengan fitur penyimpanan cloud storage yang memudahkan untuk berbagi dokumen. Metode analisa SWOT untuk mengetahui penggunaan sistem secara keseluruhan dimulai dari strategi, peluang, kekuatan dan kelemahan. Kombinasi SHA-256 dan Teknologi blockchain diterapkan pada Smart Digital Signature untuk menyimpan data dengan keamanan yang tinggi dan terjamin keabsahannya dan terhindar dari pemalsuan. Temuan dari penelitian ini sistem tanda tangan digital memiliki dampak yang signifikan dari pemalsuan, pengesahan dan keamanan dokumen.
Effectiveness of the use of various digital applications to promote public health in Indonesia: A study of the impact of technology on public health
Authors: Nugroho Budi Sulistiyo Nugroho , Filani Rizal Maulana , Bangkara B.M.A.S. Anaconda , Mona Ganiem Leila , Yuridian Purwoko Reza
Published: November 2022

This study was conducted to gain an in-depth understanding of what and how effective the use of digital applications to promote public health is due to the increasingly powerful impact of technology, including public health. This elephant utilizes the data we search electronically on compounds of health publications and technologies released between 2010 and 2022. We examine them under a biological approach that involves a series of techniques such as coding the data, evaluating the data thoroughly, and approaching conclusions so that we will get answers. Finally, digital applications to promote public health, especially in Indonesia, are a non-negotiable necessity, considering the effectiveness and innovation provided by technology that can complete health tasks that have been carried out manually. These findings will be helpful for further studies.
Experiencias de profesionales como herramientas de formación para el alumnado de Psicología. Entrevista a psicóloga de la dirección general de discapacidad de la Junta de Andalucía.
Authors: Arias Sánchez Samuel , Vázquez-Morejón Jiménez Raquel Marina , García Jiménez María , Murvartián Carrascal Lara , Benítez González Miryam , Alcocer Gómez Elisa Isabel , García Crespo Lara , Gutiérrez Rivas María José
Published: November 2022

En este video en particular dos estudiantes del Grado en Psicología entrevistan a una psicóloga que trabaja en la dirección general de discapacidad de la Junta de Andalucía, en relación a su formación, recorrido profesional, sobre cómo accedió a su puesto de trabajo y algunas características de su trabajo cotidiano, incluyendo experiencias positivas, negativas y recomendaciones para futuras psicólogas, especialmente quienes se quieran dedicar a este ámbito profesional.

Este vídeo está pensado fundamentalmente para estudiantes de Psicología, de la Universidad de Sevilla o de cualquier otra y de cualquier curso, que se quieran informar acerca de las posibles salidas profesionales que tendrían como graduados/as en Psicología. Puede servir para conocer las diferentes salidas profesionales que existen, así como la forma de acceder a ellas, y las tareas que realizan en su día a día.

Ayuda a entender las múltiples salidas profesionales que tiene la Psicología, en qué consiste el día a día de cada una de ellas y cuáles son las diferentes vías de acceso a cada una de ellas. En este video en concreto se habla de la especialidad de la Psicología para la atención a la discapacidad.
THE ROOTS, THE BRANCHES AND THE FRUITS: EXPLORING THE IMPACT OF BRAZILIAN STUDENT ENTREPRENEURSHIP SOCIETIES ON STARTUP CREATION AND ON ENTREPRENEURSHIP EDUCATION
Authors: Guerreiro Fernando , Ferrari Roberto
Published: November 2022

Student Entrepreneurship Societies (SES) are bottom-up organizations, led and developed by university students to promote entrepreneurship and innovation practices. This paper reports results of research aimed to survey the Brazilian SES, characterizing their main activities, challenges, supporters, and how SES are impacting startup creation and the development of entrepreneurship skills among students. We identified the Brazilian SES, applied two questionnaires to gather information about the SES and interviewed some SES leaders. We found 92 SES in Brazil. Only 3,7% of the 2608 Brazilian Universities were linked to a SES, and the 940 students directly involved in SES represent only 0,01% of the 8.03 million Brazilian university students. In the UK such proportion is considerably higher - 1,2%. SES members study Canvas Business Model, pitch, MVP, Design Thinking and Lean Startup; they promote talks, workshops, networking events, hackathons, and business plan competitions. They develop practical projects essentially in all areas and receive support from professors, entrepreneurs, startups, investors and other agents of the ecosystem. Although SES leaders have reported participation and/or support in the creation of 24 startups, only 8 (28,57% from 28 respondent SES) had records on startup creation. Through involvement in SES, the student’s education is enriched by theory and practice, networking, and influence from professors, entrepreneurs, startup communities and other students. The positive impact of SES on a student’s professional development should motivate policy makers, startup communities, investors and universities to consider increasing support to SES. New research should be conducted to shed light on the impact of SES for the creation of new businesses.
ZETA Converter as a Voltage Stabilizer with Fuzzy Logic Controller Method in The Pico Hydro Power Plant
Authors: Nugraha Anggara Trisna , Eviningsih Rachma Prilian
Published: November 2022

The development of the use of renewable energy that is environmentally friendly has been widely carried out, one of which is the use of energy as a turbine drive in the Pico Hydro Power Plant. The main problem in using energy, especially water energy, is the flow of water which can affect the flow of water used to rotate the turbine, so that the voltage on the DC link cannot be kept constant. Therefore, in this paper, we will design and simulate the charging process for a lead acid battery with a DC-DC converter and a Pico Hydro Power Plant as the main source. The type of generator used in the Pico Hydro Power Plant is a DC generator. The output voltage of the DC generator is still fluctuating, so to keep the output voltage constant, a DC-DC converter is needed, namely the ZETA Converter, so that its efficiency will be better when compared to using other types of converters. The ZETA converter with a DC generator as a source will be used for the battery charging process using the Fuzzy Logic Controller so that the output voltage of the ZETA converter can be kept stable or constant. The results obtained in the close loop simulation test are that the output voltage is constant at 14.4 V and the output current is 6.64 A so that it can be used for the battery charging process that will be used for household lighting.
MATHEMATICAL DESCRIPTION OF THE PROCESS OF MECHANICAL ACTIVATION OF MoS2 AND MWCNT FOR MOTOR FUEL AND OIL
Authors:   Tambov State Technical University, Shchegolkov Alexander , Zahiwat Murtada Attya ,   Tambov State Technical University, Zemtsova Natalia ,   Tambov State Technical University, Shchegolkov Alexey ,   Tambov State Technical University, Skomorokhova Anastasia ,   Tambov State Technical University
Published: November 2022

It is possible to improve the properties of motor fuel and oil by using a new generation of additives that can improve a number of functional indicators. Increasing the efficiency of additives can be achieved through both the use of combinations of different types of additives that provide different properties, and the use of new effects realized during the transition to a nanoscale form. Thus, one of the nanoscale materials that can be used in combination with molybdenum disulfide (MoS2) are multi-walled carbon nanotubes (MWCNTs). The introduction of MoS2 and MWCNTs into motor fuel and oil is advisable to organize using a combined method of dispersion and mechanical activation, which can be implemented in devices with a vortex electromagnetic field. Such devices allow mechanical action by moving the grinding bodies in an alternating electromagnetic field. This breaks up agglomerates into MWCNTs and reduces MoS2, which increases the effectiveness of these additives and reduces their concentration in motor fuel and oil. The paper presents a mathematical description of the process of mechanical activation. The grinding of a dispersed material is presented in the form of matrices and the equations of motion of a ferromagnetic particle in a vortex layer are given. The principle of operation of the vortex layer apparatus (VLA) is described and the electromagnetic processes in the stator windings of the VLA are considered. An analysis of the VLA thermal control device with an implicitly pole inductor was carried out. The developed mathematical description of the process of mechanical activation of motor fuel and oil makes it possible to take into account a number of factors that affect the operating modes of the installation for mechanical activation.
INVESTIGATION OF DIESEL MIXED FUEL PROCESSED IN A COMBINED MIXER
Authors:   All-Russian Scientific and Research Institute of Use of Techniques and Oil Products in Agriculture, Meshcheryakov Alexander , Meshcheryakova Yulia ,   All-Russian Scientific and Research Institute of Use of Techniques and Oil Products in Agriculture, Nagornov Stanislav ,   All-Russian Scientific and Research Institute of Use of Techniques and Oil Products in Agriculture, Kornev Alexey ,   All-Russian Scientific and Research Institute of Use of Techniques and Oil Products in Agriculture, Lixutina Anna ,   All-Russian Scientific and Research Institute of Use of Techniques and Oil Products in Agriculture, Lozhkina Ekaterina ,   All-Russian Scientific and Research Institute of Use of Techniques and Oil Products in Agriculture
Published: November 2022

Diesel mixed fuel has found wide application in the agricultural industry. Vegetable oils or methyl esters of vegetable oils are used as an additive to the mixed fuel. The use of this type of fuel helps to reduce emissions in the exhaust gases of automotive equipment, reduce sulfur content, reduce the use of oil resources, and improve the environmental situation of the region. However, the resulting diesel mixed fuel has an increased viscosity compared to the original diesel fuel. To eliminate this disadvantage, various kinds of combined devices are used. The article considers a modular combined mixer that allows not only to obtain diesel mixed fuel, but also to process it, affect its composition and structure. The combined mixer consists of several composite modules that allow for hydrodynamic, cavitation, and ultrasonic effects on the fuel. Chromatographic examination of fuels (diesel fuel, ginger oil, biodiesel and 20% diesel mixed fuel) was carried out before and after treatment. After the combined treatment of 20% diesel mixed fuel in the mixer module, there was a decrease in the light (by 0.19%) and heavy (by 3.61%) fractions, an increase in the average fraction (by 3.78%). That is, the fractional composition of diesel fuel is "normalized". This is due to the breaking of intermolecular bonds, activation, recombination and reduction of double bonds in fatty acid residues of unsaturated acids. Thus, processing in a combined mixer module with the use of an ultrasonic module makes it possible to mix efficiently, improve the physico-chemical parameters and composition of the resulting diesel mixed fuel.
DEVELOPMENT OF MECHANIZATION TOOLS FOR REMOVING SOIL SHAFTS FROM THE BUTTON PROTECTIVE ZONE OF REPAIR RASPBERRY BEFORE CUTTING
Authors:   Bryansk State Agrarian University, Kupreenko Alexey , Kuznetsov Vladimir ,   Bryansk State Agrarian University, Isaev Khafiz ,   Bryansk State Agrarian University, Isaev Samir ,   Bryansk State Agrarian University
Published: November 2022

It was found that the shafts of soil in the near-growth zone and uneven topography of row spacings reduce the quality of the mechanized method of cutting remontant raspberries. Statistical indicators of the microprofile of row spacing in the range: dispersion 2.0 - 4.0 cm2, standard deviation 1.4 -2.0 cm, cutoff frequency 8 - 15 were obtained by the method of unleveling and statistical processing. The design schemes of mounted machines for removing shafts of soil from the protection zones near the mouth with leveling the profile on the same level with the soil profile in the raspberry row have been developed. The basis of the structures is an arched frame hinged on the tractor from the side and controlled by a hydraulic cylinder. Two additional frames are pivotally attached to the lower ends of the frame. Rotary working bodies are provided for easy soils. Plow tools with a cut-out blade and vane rotors are designed for heavy soils. The developed machines allow removing soil banks from the raspberry protective zones on both sides of the row in one pass. The developed machines allow removing soil banks from the raspberry protective zones on both sides of the row in one pass. The soil from the shafts is scattered into the row-spacing, leveling its irregularities, and the bottom of the furrow is formed on the same level with the soil profile in the raspberry row. This creates an optimal terrain for the subsequent movement of the mower.
Design of Frequency Reconfigurable Antenna on Dielectric and Magnetic Metamaterial Composite Substrate
Authors: Al-Omari Mousa , Attia Hussein , Qureshi Khurram Karim , Sheikh Sharif Iqbal
Published: November 2022

Reconfigurable planar antennas are essential in multifunctional wireless communication devices. This paper presents the design of a frequency reconfigurable patch antenna printed on a composite substrate made of a dielectric and a magnetic metamaterial (MMM). The MMM comprises magnetized ferrite slabs with embedded split-ring resonators (SRR). The constructive coupling between the resonances of the magnetized ferrites and SRR is optimized to achieve promising reconfigurable properties. The proposed frequency reconfigurable antenna demonstrates a 158% increase in the frequency tuning range. Furthermore, the simulated results are experimentally verified, and the composite substrate shows slight effects on the antenna radiation characteristics.

 
Waveform Design with Constellation Extension for OFDM Dual-Functional Radar-Communications
Authors: Memisoglu Ebubekir , Yılmaz Talha , Arslan Hüseyin
Published: November 2022

Orthogonal frequency division multiplexing (OFDM) is widely used and works efficiently for the communication, but emerging applications requires OFDM to be flexible to meet sensing requirements. The time-frequency waveform design of OFDM for dual-functional radar-communications (DFRC) is critical to achieve the future communication and sensing requirements. Therefore, we propose a novel method to minimize Cram\'{e}r-Rao bounds (CRBs) of the delay and Doppler estimation to improve radar performance of an OFDM DFRC system. Although some methods are proposed in the literature to improve the CRBs, these methods either require feedforward signaling or subcarrier reservation. However, it is possible to exploit the constellation extension of quadrature amplitude modulation (QAM)  to achieve lower CRBs without these requirements. Therefore, the proposed method provides a transparent communication along with the CRB minimization for conventional OFDM systems. For the evaluation of the proposed method, CRB and symbol error rate (SER) are considered in the simulation results. Furthermore, the theoretical SER  analysis of the proposed method is derived to understand the effects of CRB minimization on the communication performance.
A Formação ética, moral e em valores na pesquisa em educação.
Authors:   Faculdade de Filosofia e Ciências - FFC - Campus de Marília - Unesp, Martins Raul Aragão , Silva Matheus Estevão Ferreira da
Published: November 2022

Esta coletânea surgiu com a proposta de divulgar resultados de pesquisas, desenvolvidas no âmbito do Programa de Pós-Graduação em Educação (PPGE) da Faculdade de Filosofia e Ciências (FFC), Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Campus de Marília, que abordam a intersecção dos temas ética, moral e valores com a Educação. O livro reuniu 18 textos resultantes de pesquisas de Mestrado, Doutorado e Pós-Doutorado, concluídas ou em andamento, que foram distribuídos em duas partes. Na primeira parte, Contribuições, análises e reflexões teóricas, encontram-se 11 textos que abordam resultados de pesquisas que investigaram os temas em questão no ponto de vista teórico. Na segunda parte, Diagnósticos, intervenções e revisões da pesquisa empírica, reúnem-se 08 textos resultantes de pesquisas empíricas ou de revisões da produção dessas investigações. 15 desses textos são de autoria de discentes, que contam ou não com a coautoria de seus(suas) respectivos(as) orientadores(as), enquanto os outros 03 textos são de autoria de professores(as) convidados(as), de alguma forma também envolvidos(as) com o PPGE. Essa reunião de textos resultou em um livro que trata de alguns dos principais tópicos da pesquisa em Educação sobre os temas em questão, de seus atuais avanços, desafios e perspectivas futuras.
A importância da avaliação emancipatória na educação profissional e tecnológica
Authors: De Amorim Angela Valéria , Dos Santos José Alex Alves , Dos Santos Iraneide Nascimento , Da Cunha Júnior Humberto Beltrão , Rodrigues Heloisa de Melo , Maciel Daniele Claudino , Dos Santos Jéssica Priscila Rivas
Published: November 2022

This article aims to reflect on the importance of emancipatory assessment in Professional, Scientific and Technological Education (EPCT). Assessment is a tool for judging and classifying the subject, based mainly on the results obtained by him. In a broader conception, in Vocational Education, assessment is characterized by the process of meeting basic educational assumptions based on inter and transdisciplinarity, relating theory and practice, with the central focus on the educational process and training for work. As a research methodology, the essay was used, which is based on representative bibliographic references. The study was presented in sections, in which for each subject approached there was the development of knowledge and deepening of the themes, such as: the conception of learning evaluation; evaluation as an emancipatory practice; instruments used in evaluation practices in professional education; feedback for students; contributions of learning assessment to teaching work and the challenges of assessment in Professional, Scientific and Technological Education (EPCT). This study showed that the assessment of learning as an emancipatory practice constitutes, in this educational segment, a very complex and fundamental action for the professional training of students.
Nutrición en el paciente con enfermedad pulmonar obstructiva crónica (EPOC)
Authors: Ojeda-Ibáñez María Fe , Vera-Talledo María Isabel
Published: November 2022

La enfermedad pulmonar obstructiva crónica (EPOC) es un serio problema de salud pública a nivel mundial, cuya estadística lamentablemente ha ido en aumento, proyectándose a ser la tercera causa de muerte en el año 2030. La nutrición de un paciente con EPOC es determinante para asegurar u buen pronóstico de recuperación, por lo que, una evaluación adecuada, integral y oportuna debe realizarse a todos los pacientes con este diagnóstico e indicarse un régimen dietético bajo en carbohidratos y alto en grasas. Hay evidencia de que el uso de suplementos nutricionales mejoraría la calidad de vida en pacientes con EPOC.
¿Es Perú el país con mayor tasa de mortalidad en el mundo?: un análisis situacional
Authors: Gonzales Gustavo F.
Published: November 2022

La pandemia de COVID-19 oficialmente ha ocasionado, a mayo de 2022, más de 6,9 millones de muertes en el mundo; sin embargo, esta cifra se encuentra tres veces por debajo de los excesos de muerte para el mismo periodo. El Perú, al 14 de agosto de 2022, tiene la mayor tasa de mortalidad en el mundo. Esto se debe a que corrigió las muertes por COVID-19, incorporando el exceso de mortalidad el 31 de mayo de 2021, pasando de 70 mil muertes a 180 mil. El número de casos en los países más pobres es menor que en los países de mayores ingresos, sin embargo, la tasa de letalidad (muertes/casos* mil) es mayor. La mayor severidad de la infección en los países más pobres se debe a la desigualdad en los servicios de salud y en la menor cobertura de vacunación. Luego del primer caso de COVID-19, presentado en marzo de 2020 en Perú, han ocurrido cuatro olas con diferentes intensidades y amplitudes. La de mayor intensidad, pero de menor amplitud fue la tercera ola y, actualmente, estamos en las finales de la cuarta ola. La mayor cantidad de muertes se observa en la primera y segunda ola, y es mucho menor en la tercera y cuarta ola, donde los casos fueron mayores.  En el Perú, la vacuna se aplicó desde el 9 de febrero de 2021. Ese día se aplicó la vacuna contra COVID-19 del laboratorio chino Sinopharm a 3 842 personas. Desde ahí, las vacunas utilizadas en Perú corresponden a los laboratorios Sinopharm, Pfizer, AstraZeneca, Moderna y Janssen. Actualmente, hay personas, particularmente el personal de salud y mayores de edad, que ya han recibido una cuarta dosis. En esta revisión también se analiza la influencia de las aglomeraciones de personas, la vida en zonas altitudinales, la edad cronológica, la contaminación ambiental, la medicación y la automedicación en la severidad de la COVID-19. Por efecto de la pandemia, la esperanza de vida en América Latina se ha reducido en dos años. En conclusión, el Perú ha sincerado sus muertes por COVID-19 basado en los cálculos de exceso de mortalidad, lo cual debería ser realizado en los otros países de la región para determinar la real magnitud de la pandemia en América Latina y El Caribe y explicar los factores que la determinan en cada país. Por ello, no es aceptable decir que Perú tiene la mayor tasa de mortalidad en el mundo. En el Perú, como en otras partes del mundo, los mayores de edad representan cerca del 87% de las muertes y los programas de los gobiernos deben priorizar este grupo etario para tratar de reducir su alta tasa de mortalidad.
IN SEARCH OF A HERO: APPROACHING THE OPERA "CHAPAYEV" BY A. N. KHOLMINOV
Authors:   State Music and Pedagogical Institute named after M. M. Ippolitov-Ivanov, Moscow, Russian Federation, Romashchuk I. M.
Published: November 2022

The article explores the artistic phenomenon of "Chapayev" in the little-known opera of the same name by A. N. Kholminov, completed in 1. Since this was not the first and not the last appeal to the Civil War episodes narrated by D. Furmanov, the legendary film "Chapayev" (1936) by the Vasilyev brothers, B. Mokrousov's opera "Chapay" (1942, 1957), V. Pelevin's novel "Chapayev and Pustota" (1996) came into view. The publication "My Unknown Chapayev" (2005) by Evgeniya Chapayeva, great-granddaughter of the war hero, and the TV series "Chapayev Passion" directed by S. Shcherbinin based on the script by E. Volodarsky (2013), are noteworthy. Various versions of D. Furmanov's novel, preserved in the archives, which give an idea of the work of the writer and screenwriters are named. The analysis of the full text of the novel [3] leads to the conclusion that it is distinguished by its diversity, combining different genre and stylistic forms, using the means of creating a historical narrative, documentary prose, mythological tale and romantic novel, as well as contrasting scenes and episodes. This turned out to be important for understanding the specifics of the main object of research — Kholminov's opera "Chapayev". The paper considers the principles of revealing the images of the main characters and folk scenes of the opera in relation to Furmanov's text. Particular attention is focused on the special role of the choir and on the unusual musical component of Chapayev's characteristics.
METHODOLOGICAL ASPECTS OF RESEARCH OF COMPOSITION OF BIOFILMS in vitro, ex vivo, in vivo
Authors:   Moscow State University of Food Production Moscow, Russian Federation, Lenchenko Ekaterina M. , Blumenkrants Dmitry A. ,   Moscow State University of Food Production Moscow, Russian Federation, Ponomarev Vladislav V. ,   Moscow State University of Food Production Moscow, Russian Federation, Pavlova Inna B. ,   All-Russian Research Institute of Veterinary Sanitation, Hygiene and Ecology – Branch of Federal State Budget Scientific Institution «Federal Scientific Center – K.I. Skryabin, Ya.R. Kovalenko All-Russian Research Institute of Experimental Veterinary Medicine, Russian Academy of Sciences», Moscow, Russian Federation, Tolmacheva Galina S. ,   FSBSI «Federal Scientific Center of Food Systems named after V.M. Gorbatov», Moscow, Russian Federation
Published: November 2022

The article presents the general patterns of formation of a three-dimensional multilayer heterogeneous structure biofilms in vitro, ex vivo, in vivo. It was found, that the mass fraction of cells of biofilms was 86,8-91,4%, of the matrix – 8,9-13,2%, which is due to the structure of the cell wall of microorganisms synthesizing the extracellular matrix. The advantages of transmission and scanning electron microscopy are the visualization of L-shapes and the quantitative assessment of the diameter, perimeter, height, area, volume and chemical composition of cells and the extracellular matrix of microorganisms. Laser modulation interference microscopy made it possible to study biofilms in real time without fixing and staining microorganisms; phase-contrast microscopy – intrapopulation and interpopulation interactions depending on changes in the pH of the environment, oxygen content and other chemical and physical factors. Fluorescent microscopy is a promising method for detection of non-culturable viable cells of microorganisms. The use a modified Gram stain, the use of solution of «Crocus sativus» made it possible to differentiate gram-negative and gram-positive microorganisms and to assess the degree of repair of tissue. The developed new methodological approach made it possible to scientifically substantiate and experimentally confirm the effectiveness of the use of nutrient media containing components for the repair of the cell wall of microorganisms.