bluuebunny/crossref_metadata_2025 huggingface dataset:
USE OF OPEN-SOURCE COTS/MOTS HARDWARE AND SOFTWARE PLATFORMS FOR THE BUILD UP OF THE CUBESAT NANOSATELLITES
Authors: Любімов О.В. , Любімов М.О.
Published: November 2023

Abstract. CubeSats as a sub-class of nanosatellites have become a game-changer in the industry of scientific research and exploration of the new space technologies. Their cost effectiveness, relative ease of manufacturing, and the predicted lifecycle are the main factors of success. Having such popularity in mind – many vendors, student teams and enthusiast started to build their platforms to offer reuse and faster buildup of such satellites, introducing so-called COTS/MOTS approach of the satellite’s construction. However, looking into statistics – only 2.5% of the launched satellites were able to full perform their mission, and almost 25% just failed. Partially, the key problems are in the area of using non-radiation hardened electronics as the CubeSat idea is to use commercial (or at utmost automotive) components. Authors of the article provide a holistic view on the existing hardware and software platforms that are currently available as COTS/MOTS solutions, as well as their capabilities. Part of the research was done in the area of the available software frameworks, as the modern software has rather high cyclomatic complexity and often it is exactly software components that make CubeSat mission at risk. Software related frameworks are compared via the use of newly introduced by the authors multi-factor ranking model (FMCSA). At the same time the article raises the cross-country problem of the creation and use of the Ukrainian platform for the CubeSats. Authors propose a solution for the creation of the part of the CubeSat platform as the starting point and it is an On-Board Computer (OBC). The idea is to design an OBC that can solve the big portion of the known issues of the CubeSat hardware and software with the major stress on the hardware issues related to the Single-Event Upset (SEU) and Single-Event Latch Up (SEL), without moving to the radiation tolerant semiconductors. Proposed in the article solution combines the selection of the modern central processor, that is industry recognized, availability of the software solutions for it, as well as the power-domains control principle that allows to minimize the potential harm of the SEU and SEL radiation-driven events.
НОВА ПРОЄКТНА МЕТОДИКА РОЗРАХУНКУ ОСНОВНИХ ПАРАМЕТРІВ СОНЯЧНОГО КОЛЕКТОРА
Authors: Габрінець В.О. , Накашидзе Л.В.
Published: November 2023

Анотація. Запропонована нова методика розрахунку конструкції сонячного геліоколлектора, який перетворює сонячну енергію для отримання тепла. В ній пропонується застосовувати коефіцієнт заміщення, який означає відношення теплоти, отриманої системою в результаті сонячного випромінювання, до повного теплового навантаження всієї системи, тобто приймити до уваги не тільки теплові втрати самого геліоколектора, но і втрати самої системи на яку працює геліоколлектори. Це дозволяє розраховувати ефективність усієї системи перетворення сонячної енергії в теплову. Пропонується класифікація систем, які використовують сонячну енергію з використанням колектора для вироблення тепла, Розглянуто різні варіанти принципових схем геліоколектора, а також різні варіанти його теплосприймаючої поверхні. Розглянуто вплив конструкції геліоколлектора на величину теплових втрат. Під час визначення коефіцієнта теплових втрат геліококолектора застосовується метод послідовних наближень. Під час визначення теплових втрат необхідно враховувати  нерівномірність розподілу температури в перерізі геліоколектора. Для цього пропонується вираз для відповідного  коефіцієнта. Зниження теплових втрат поглинаючої поверхні досягають встановленням прозорого покриття, яке повинно добре пропускати крізь себе сонячне випромінювання і утворювати повітряний прошарок, виконуючий роль термічного опору. Крім цього, покриття захищає теплосприймаючий елемент від дощу, снігу, граду і тому має бути достатньо міцним. Запропонована проектна методика розрахунку сонячного колектора дозволяє отримати такі його параметри: площу геліоколектора, кількість модулей, що входять до складу геліоколектора , теплові втрати в геліоколекторі, корисну потужність, надану теплоносію в геліоколекторі, температуру теплоносія на виході зі сонячного колектора. Вміння якісно розраховувати такий основний елемент сонячної енергоустановки, як геліоколектор, має велике практичне значення. Воно дозволяє швидко і досить точно розраховувати основні параметри всій сонячної енергетичної установки (СЕУ) в різних випадках її широкого застосування.
The Relationship of Sweet Potato Germplasm Based on Morphological Characters
Authors: Rahajeng Wiwit , Restuono Joko , Indriani Febria C.
Published: November 2023

Information about the morphological and genetic characteristics of sweet potato (Ipomoea batatas) is important in the variety development program. This experiment aimed to determine the diversity and genetic relationship of sweet potato accessions from NTT based on morphological character data. The research was carried out at Kendalpayak Research Station, Malang, East Java  from April - September 2019. The materials used were seventy-one sweet potato germplasm from the ILETRI collection (collected from NTT). Each accession was planted on a 1 m × 5 m plot size, with a spacing of 100 × 20 cm (single row). Fertilization was carried out using a dose of “100 kg urea + 100 kg SP36 + 200 kg KCl ha-1”. The observed characters were the vines length, growth type, internode length, leaf length, leaf width, leaf size, leaf bone color, leaf shape, leaf characteristics, lobes number, lobe shape, mature leaf color, shoot color, pigmentation of petiole, young stems pigmentation (dominant and secondary color), young leaves feathers, tuber skin color, tuber flesh color, weight of canopy, number of tubers perplot, weight of tubers perplot, number and weight of tubers perplot. Cluster analysis was carried out using the Minitab 17 program. There was morphological diversity in seventy-one accessions of sweet potato germplasm from NTT. Principal component analysis resulted in seven main components with the proportion of diversity 76.3%. cluster analysis, seventy-one accessions of sweet potato germplasm were divided into fifteen accession groups on the basis of 80% degree. Characteristics of shoot color, mature leaf color, leaf size, petiole pigmentation, and leaf bone color contributed greatly to the total diversity.
Leaf Anatomy Profile of Begonia Section Platycentrum Sphenanthera Group From Java and Sumatera, Indonesia
Authors: Lailaty Intani Quarta , Efendi Muhammad
Published: November 2023

Anatomical studies have been used in the classification and identification of Begonia species. However, the research on Indonesian native Begonia is still limited. This study focused to evaluate the importance of leaves’ anatomy character for the identification and classification purpose of the Sphenanthera group in Java and Sumatra. A total of six individuals of four Begonia species used in this study, namely Begonia multangula, B. longifolia, B. pseudoscottii, and B. robusta. This study aimed to describe the anatomical characters of the leaves that are useful in the identification and grouping of Begonia section Platycentrum–Sphenanthera. The anatomical preparations used the paraffin method for the cross-section of leaves and the semi-permanent method for paradermal observations. In general, the epidermal cells of paradermal Begonia leaves are polygonal in shape. Consistently, Begonias have single-type stomata with an anisocytic type which are only present on the abaxial leaves. Begonia Sphenanthera group has a thin cuticle (less than 2 µm), both in the abaxial and adaxial surfaces. The lower epidermis cells are smaller than the upper epidermis cells. The mesophyll is differentiated into palisade and spongy tissue. The number and form of mesophyll tissue are varied, therefore useful for diagnosing an important character in the grouping of Begonias from this section.
Effect of Mercury Stress on the Growth and Lipid Content of Euglena sp. and Echinodorus palaefolius
Authors: Wardana Wisnu Eka , Tantri Dea Hastaning , Afifah Marshanda Nur Roosyana , Aini Hasna Nur , Siswanti Dwi Umi , Maghfiroh Khusnul Qonita , Erfianti Tia , Amelia Ria , Kurnianto Dedy , Suyono Eko Agus
Published: November 2023

One way to reduce the adverse effects of the heavy metals mercury in the aquatic environment are using organisms to break down or convert toxic substances into non-toxic forms, either by phytore- mediation or phycoremediation. This research aimed to analyze the growth and lipid content of Euglena sp. after mercury exposure. This research also aimed to analyze the growth of E. palaefolius which is associated with Euglena sp. In this study, the bioremediation ability of Euglena sp. and Echinodorus palaefolius through treatment with mercury concentrations of 5 ppm, 10 ppm, 15 ppm, and 20 ppm, as well as association and non-association treatments. The parameters are the growth of Euglena sp. and the association between Euglena sp. andE. palaefolius measurement and lipid content. The result of the growth of Euglena sp. experienced a significant increase. Lipid content in Euglena sp. was also seen high at 10 ppm mercury concentration. In E. palaefolius, the ability to adsorb heavy metals was also shown by the large diameter of the stems and also the plant growth which has  optimal growth in the treatment of 10 ppm mercury stress.
Growth, Food Efficiency, and Enzyme Activities in Yellow Rasbora (Rasbora lateristriata) at Different Feeding Frequencies
Authors: Susilo Untung , Sistina Yulia , Wibowo Eko Setio , Mahmoud Hanan Hassan Alsheikh , Hana Hana , Rachmawati Farida Nur
Published: November 2023

Many studies have been conducted on the feeding frequency in fish, but there is no information on R. lateristriata. Therefore, this study aimed to determine yellow rasbora growth performance, feed efficiency, and digestive enzyme activity at different feeding frequencies. This research was conducted experimentally with four treatments and three replications. The treatments include: P1 fish were fed two times/day; P2 fish were fed three times/day; P3 fish were fed four times/day; and P4 fish were fed five times/day. In this experiment, 420 two-month-old yellow rasboras were used. The experimental results showed that body weight gain, RGR, SGR, CF, FCR, PER, body lipid & protein levels, protein and lipid retention, protease, and amylase activity were not significantly different (p>0.05) between different feeding frequencies. However, lipase and alkaline phosphatase activities differed significantly among the different feeding frequencies. Growth performance, feed efficiency, protease activity, and yellow rasbora amylase are not affected by feeding frequency between two to five times a day. Still, the highest lipase and alkaline phosphatase activity were achieved at the feeding frequency four times a day, but no effect on growth. So, feeding twice a day is considered quite efficient for the culture of yellow rasbora. The results of this study can contribute to the development of fish farming, especially the yellow rasbora, in the future.
Analisis Daya Keluaran pada Kinerja Motor Listrik Tipe Synchronous Berbasis Komputasional
Authors: Ferdyanto Ferdyanto , Farha Auditya , Julian James , Wahyuni Fitri , Rizal Reda
Published: November 2023

Masalah yang menjadi pertimbangan dalam penggunaan motor listrik adalah daya keluaran yang dihasilkan pada saat motor bekerja. Penelitian ini berfokus pada analisis daya keluaran Permanent Magnet Synchronous Motor (PMSM) yang akan diuji pada kecepatan tertentu serta ditinjau terhadap perubahan sudut torsi tiap putaran. Tujuan penelitian ini adalah mendapatkan analisis daya keluaran dengan karakteristik yang stabil serta kinerja PMSM yang menghasilkan efisiensi sesuai standar. Penelitian menggunakan metode komputasi dengan model finite element analysis (FEA) yang dilakukan dengan menggunakan software. Hasil dari penelitian ini diperoleh performa PMSM dengan arus input sebesar 1.5 kA pada setiap fasa sehingga motor dapat beroperasi dengan kecepatan 13300 rpm serta menghasilkan torsi sebesar 164 Nm. Fluks magnet yang terbentuk berada dalam kondisi stabil dengan nilai 0.02 Wb dan membentuk distribusi medan magnet yang merata pada setiap kumparan stator. Rata-rata daya keluaran maksimum yang dihasilkan jangkar rotor adalah 107.6 kW pada sudut torsi 114°. Penelitian telah berhasil memperoleh analisis daya keluaran pada PMSM melalui metode komputasi. Hasil analisis tersebut dapat menjadi acuan dalam proses manufaktur PMSM. The problem that is considered in the use of electric motors is the output power generated when the motor is working. This research focuses on analyzing the output power of a Permanent Magnet Synchronous Motor (PMSM) which will be tested at a certain speed and looking at changes in torque angle for each rotation. The aim of this research is to obtain an output power analysis with stable characteristics and PMSM performance that produces efficiency according to standards. The research uses computational methods with finite element analysis (FEA) models which are carried out using software. The results of this research obtained PMSM performance with an input current of 1.5 kA in each phase so that the motor can operate at a speed of 13300 rpm and produce a torque of 164 Nm. The magnetic flux formed is in a stable condition with a value of 0.02 Wb and forms an even magnetic field distribution in each stator coil. The average maximum output power produced by the rotor armature is 107.6 kW at a torque angle of 114°. Research has succeeded in obtaining output power analysis on PMSM through computational methods. The results of this analysis can be used as a reference in the PMSM manufacturing process.
Shifts in the distribution of births by gestational age, United States, 2014-2022
Authors: Martin Joyce , Osterman Michelle
Published: November 2023

Shifts in the distribution of births by gestational age, United States, 2014-2022
Geotechnical properties of natural sand-mixed granulated blast furnace slag applied to the sand compaction pile method
Authors: Nguyen Thi Thanh Nhan , Matsuda Hiroshi , Duong Trung Quoc , Tran Xuan Thach , Tran Thi Phuong An , Tran Thi Ngoc Quynh , Tran Thanh Nhan , Pham Van Tien , Nguyen Thi Le Huyen
Published: November 2023

Granulated blast furnace slag (GBFS) has more advantageous properties over natural sand, such as lightweight, higher shear strength, and higher permeability. Therefore, it is regarded as a potentially promising substitute for natural sand in the ground improvement using the sand compaction pile (SCP) method. Due to the relatively rapid solidification, however, which is induced by the latent hydraulic property of GBFS, the permeability of the installed GBFS compaction pile (GBFSCP) decreases quickly, and such an application becomes difficult for the case of SCP with low sand replacement area ratio (LSRAR). So, to decelerate the permeability reduction of GBFSCP, different GBFSs, and natural sands were collected in Japan and Vietnam, and the specimens were prepared by changing the mixing ratio of sand to GBFS from 20% to 80%. Then, firstly, fundamental geotechnical properties of sand-mixed GBFS without hydration were observed. Secondly, the specimens of sand-GBFS mixture were cured in seawater at the temperature of 80°C for 3 days to 380 days. The unconfined compressive strength, permeability, and hydration reaction rate of the hydrated sand-mixed GBFS specimen were measured.

In conclusion, the geotechnical properties of the unhydrated sand-mixed GBFS become more advantageous than those of natural sand. In addition, by mixing with natural sand, the hydration reaction rate and the solidification of GBFS are controlled. This means that it is possible to keep the compressive strength and the permeability at the predetermined conditions and, in turn, to satisfy requirements for the SCP method with LSRAR. In addition, a simple estimation method of the unconfined compressive strength was proposed for the hydrated sand-mixed GBFS specimen.
Effects of drought on enzyme activities and hotspot distribution along plant roots
Authors: Anh The Luu , Van Dinh Mai , Trung Quang Do , Feizi Ali , Duyen Thi Thu Hoang
Published: November 2023

The frequency and severity of drought are projected to increase due to climate change, and Southeast Asia is no exception. Water scarcity hampers all biochemical processes in soil and induces stunted plant growth. While the rhizosphere harbors the most dynamic biochemical processes in the biosphere, the interaction mechanisms between residing microbes and plant roots under drought are poorly understood. In this research, soybean was planted in soil collected from the Red River Delta of Vietnam to test two hypotheses: (i) drought reduces rhizosphere enzyme activities and hampers the extent of the high enzyme activity along single root (from the root tips), and (ii) the turnover time of substrate by enzymes increases with decreasing soil moisture. The research aimed to characterize distributions of β-glucosidase and acid phosphatase enzymes in a distance from root tips. In addition, enzyme activities and plant root and shoot characteristics (length and weight) were investigated. The results demonstrated that shoot length was more impacted by drought than root length with the reduction of 25% for the former and 5% for the later. Meanwhile, the reduction in shoot weight was 61%, and root weight was 90% as the plant experienced drought conditions. The extent of a hotspot for enzymes along a single plant root, measured from the root tips, also decreased in response to drought. Furthermore, drought reduced both rhizosphere enzyme activities, resulting in a slower turnover time of β-D-glucopyranoside (MUF-G) and 4-methylumbelliferyl-phosphate(MUF-P) substrates. The research has shed light on the adverse impacts of drought on root-microbe interactions, which ultimately lead to poor crop growth.
Supporting Employment Transportation in Southern Georgia
Authors:   Western Transportation Institute, KaralynClouser Karalyn , NatalieVillwock-Witte Natalie ,   Western Transportation Institute, Kissel Carrie ,   National Association of Development Organizations, Allphin Bret ,   National Association of Development Organizations
Published: November 2023

The Southern Georgia Regional Commission (SGRC) is a regional planning agency that conducts economic development, regional transportation and environmental planning, local government services, aging programs, workforce development, geographic information systems (GIS), and other services for an eighteen-county region. The region includes Atkinson, Bacon, Ben Hill, Berrien, Brantley, Brooks, Charlton, Clinch, Coffee, Cook, Echols, Irwin, Lanier, Lowndes, Pierce, Tift, Turner, and Ware Counties. Within its rural regional transportation program, SGRC develops rural transit development plans (TDPs) under contract to the Georgia Department of Transportation. SGRC also administers coordinated human services transportation for clients of agencies within Georgia’s Department of Human Services. In the summer of 2021, SGRC began to operate rural public transit services on a regional basis called SGRC Regional Transit, providing a mobility option for 15 of the 18 counties in the region. One of the region’s goals in establishing region-wide rural public transit is to address economic development, including providing mobility to existing and potential employment sites. The region’s 2020 update to the Comprehensive Economic Development Strategy (CEDS) notes: “While some growth has been experienced within the region, persistent poverty, underemployment, and unemployment continue to plague the area.” Several goals and strategies in the CEDS relate to these issues of addressing poverty and employment. These include encouraging the establishment of transportation systems and facilities that support residents and visitors to broaden mobility options. In addition, some employers have already begun transportation services at their own expense. Others, including food processing business, have expressed to area workforce development and economic development professionals that they could create additional jobs if they had access to additional workers.
NUMERICAL PREDICTION OF SIZE DISTRIBUTION OF MICROBUBBLES IN WATER WITH MASS TRANSFER
Authors: Li Yuegui , Hosokawa Shigeo , Hayashi Kosuke , Tomiyama Akio , Maeda Yasunari
Published: November 2023

It has been reported that the diameter and the number density of microbubbles would change in time due to mass transfer between bubbles and surrounding liquid. However, few numerical studies have been conducted on the time evolution of diameters of single microbubbles or groups of microbubbles due to mass transfer. Numerical simulations based on the Rayleigh-Plesset equation were therefore
carried out to investigate the time evolution of bubble diameter and the mass transfer of dissolved gas between bubbles and water in microbubble flow in a duct. As a result, the following conclusions were obtained: (1) the present numerical method can accurately predict the growth and shrinkage of a single microbubble. (2) Microbubbles in a flow usually have size distribution, in which bubbles
larger and smaller than the equilibrium diameter become larger and smaller in time, respectively. Thus, the size distribution changes in time. (3) The proposed numerical method can reasonably predict time evolutions of bubble size distributions, void fractions, and concentrations of dissolved gas, provided that a reliable initial condition is available.
Parametric analysis of the production of alternative sodium silicate applied in alkali-activated materials
Authors: Pelissaro Deise Trevizan , Vanzetto Suelen Cristina , Rosa Francisco Dalla , Prietto Pedro Domingos Marques , Silveira Adriana Augustin
Published: November 2023

Although alkali-activated materials (AAMs) are considered potential substitutes for Portland cement, they still come with elevated costs and significant carbon dioxide emissions. The development of alternative activators, such as sodium silicate based on the dissolution of rice husk ash (RHA), could partially overcome these disadvantages. However, to maximise the mechanical performance of AAMs, the production of RHA-based sodium silicate (RHA-SS) needs to be fully understood. The production process of an alternative RHA-SS activator was thus investigated through experimental evaluations of RHA grinding time, RHA dissolution time and thermal curing temperature and time. Mechanical performance was evaluated through compressive strength tests carried out on alkali-activated pastes made up of metakaolin, as a precursor, and two different activators (RHA-SS and a commercial sodium silicate). Microstructural features were evaluated through X-ray diffraction, scanning electron microscopy and thermogravimetry analyses. Optimal production was obtained for a grinding time of 30 min, a thermal curing temperature of 40°C, dissolution time of 6 h and a thermal curing time of 8 h. The results show the efficiency of the alternative alkaline activator, which may represent a technically viable solution for larger scale application to AAMs.
Influencing effects of variant laser pulse energy on fatigue behavior induced by LSP
Authors: Larson Enoch Asuako , Adu-Gyamfi Samuel , Ebenezer Abankwa Omari , Augustine Milku Kwame , Yamba Philip , Azeko Salifu Tahiru , Dzebre Denis E K
Published: November 2023

The set objective in this study is to understand the effects of laser shock processing of variant laser pulse energies on residual compressive stress, microhardness, fatigue fracture and fatigue life in the application of aircraft lug material. The effects of three variant laser pulse energies of 3.0, 4.0 and 5.7 J were examined along with laser processing parameters. A Q-switch (neodymium (Nd)-doped yttrium aluminum garnet) laser system was used in this experiment with a wavelength, a pulse width, a spot diameter and an overlapping ratio of 1046 nm, 10 nm, 3 mm and 50%, respectively. After laser shock peening (LSP), the superficial layer stress state showed varied results from tensile to residual stress of 50 to −225, −260 and −301 MPa after 3.0, 4.0 and 5.7 J, respectively. The microhardness of the as-received specimen was 137 HV. However, after LSP, it increased to 198, 210 and 223 HV, respectively. The fatigue life performance also significantly increased up to 53 371 (2 × 105) cycles.
Permeability of polymer-modified kaolinite and fly ash–kaolinite mixtures
Authors: Li S.-L. , He R.-J. , Kang X.
Published: November 2023

With the goal of promoting the treatment and reuse of fly ash (FA), a series of permeability tests were conducted to investigate the hydraulic conductivity (K) of polymer (chitosan, polyethylene oxide (PEO) and xanthan gum)–FA—kaolinite (KA) systems under different confining pressures and overconsolidation ratios (OCRs). The addition of FA increased the K of KA due to changes in particle size and gradation, and the effect is not significant when the FA content is below 30%. PEO and xanthan gum increased the K of KA, with xanthan gum having a more significant effect, while chitosan reduces it. For FA–KA mixtures, chitosan and xanthan gum had negligible impact on the K, whereas PEO increased it by an order of magnitude. In addition, confining pressure restricts the flow channel while increasing the effective contact area between polymers and soil particles. The Koc/Knc of polymer-modified KA rapidly converges at high OCRs, while that of polymer-modified FA–KA converges at low OCRs. This study provides insight into the effects of polymer modification on the hydraulic conductivity of FA–clay mixtures and provides guidance for the application of polymer modification technology in soil improvement.
Engineered bioclogging in sands: comparison of microbially induced and enzyme-induced biopolymer formation
Authors: Kim Yong-Min , Kwon Tae-Hyuk
Published: November 2023

This study presents two methods of producing an insoluble biopolymer − microbially induced biopolymer formation (MIBF) and enzyme-induced biopolymer formation (EIBF) − and explores their ability to reduce hydraulic conductivity and cause bioclogging in soil from pore to column scales. The batch experiments confirm that insoluble polysaccharidic biopolymers, dextran, are successfully produced either by the model bacteria or by the extracted cell-free enzyme. The results show that the EIBF method is more efficient in producing biopolymer and reducing hydraulic conductivity compared to the MIBF method. This study also uses microfluidic chips, which reveals the pore-filling behaviour of biopolymers produced by both methods. EIBF produces larger dextran flocs than MIBF, and hence EIBF lowers the hydraulic conductivity more than MIBF for a given pore occupancy of dextran. Column experiments demonstrate that both MIBF and EIBF can significantly lower the hydraulic conductivity of coarse sands by two orders of magnitude with only 3% biopolymer pore saturation. The presented results suggest that both methods have the potential to induce well-controlled, engineered bioclogging in coarse-grained soils, and have applications in various geotechnical practices, such as sealing leakage in water-front structures, installing hydraulic barriers and mitigating soil erosion.
Impact of SCMs and fibres in ECC on the fire resistance of hot-jointed SCC/ECC composites
Authors: Baloch Waqas Latif , Siad Hocine , Lachemi Mohamed , Şahmaran Mustafa
Published: November 2023

The influence of various supplementary cementitious materials (SCMs) and fibres on the fire resistance of composite systems that combine engineered cementitious composites (ECCs) in tension with self-compacting concrete (SCC) in compression was examined. The study was designed to determine the ideal ECC formulation for optimising mechanical properties and bonding performance at ambient and elevated temperatures. The SCC and ECC were hot-joined without vibration or surface preparation, using a fresh-to-fresh casting method. Modifications to the chemical composition of the ECCs included the addition of class F fly ash (FAF), class C fly ash (FAC) or slag, as well as polyvinyl alcohol (PVA) fibres or steel fibres. The samples were exposed to temperatures of 200°C, 400°C, 600°C and 800°C, followed by comprehensive testing to evaluate their flexural strength, tensile strength and interfacial properties. The results indicate that the incorporation of an ECC layer within the SCC system significantly improved mechanical strength and thermal stability, both at ambient temperatures and under high-temperature conditions. Notably, the addition of FAF (rather than FAC or slag) in the ECC layer offered superior thermal stability and ensured the retention of desirable residual mechanical properties. Moreover, steel fibre reinforcement greatly improved the SCC/ECC bonding, outperforming PVA reinforcement at elevated temperatures.
INTERACTION OF SCHOOL AND FAMILY IN THE PROFESSIONAL SELF- DETERMINATION OF SCHOOL GRADUATES
Authors:   Bishkek State University named after K. Karasaev, Abdyrakunova Zhyldyz
Published: November 2023

It is noted that the role of vocational guidance, professional self-determination is developing, and the education system needs to be deepened. Vocational self-determination and career guidance today are aimed not only at the choice of a particular profession, but also at the formation of universal qualities of students, such as freedom and awareness in choosing a profession, responsible choice, mobility. Professional self-determination is very important, because it is an integral part of the comprehensive and harmonious development of the individual and should be considered in the unity and interaction of all nurturing and influencing factors. The best option in this direction is for the school and the family to work together. The article examines and analyzes the scientific literature and describes the main directions, methods and forms of family and school activities for self-determination of school graduates.
Devlet Okullarında ve Özel Okullarda Görev Yapan Sınıf Öğretmenlerinin Kaynaştırma Eğitimine İlişkin Tutumlarının İncelenmesi
Authors: SERTKAYA Muhammet Fatih , AR Ömer Faruk , ÇIKILI Yahya
Published: November 2023

Devlet okullarında ve özel okullarda görev yapan öğretmenlerin kaynaştırma eğitimine ilişkin tutumlarının incelenmesi amacıyla yapılan bu araştırmada nicel araştırma yöntemlerinden tarama modeli kullanılmıştır. Araştırmaya 2022-2023 eğitim öğretim yılında devlet ve özel okullarında görev yapan 198 sınıf öğretmeni katılmıştır. Veriler kişisel bilgi formu ve Kaynaştırma Eğitimi Tutum Ölçeği ile toplanmıştır. Toplanan veriler SPSS 22.0 programında çözümlenmiş, frekans, yüzde, Mann Whitney U testi, Kruskal Wallis H testi, Dunnet T3 Post Hoc testi kullanılmış, anlamlılık düzeyi (p
Hydrochemistry of an aquifer in Quaternary loess like sediments in the Pampean Plain, Argentina
Authors: Martínez Daniel E. , Osterrieth Margarita
Published: November 2023

Loess like sediments cover an area of about 1.800.000 km2 in the Pampa plain of Argentina, forming an aquifer system which is used for water supply for most of the cities an rural population in the region. This aquifer supplies water to agricultural productive activities that contribute to about a 60% of the national gross produce of the country. In this paper, detailed studies in a local sector of the aquifer near to Mar del Plata, in the landÆ lling area of the city, are performed. The main goal is to characterise the hydrogeochemical processes giving the chemical groundwater composition, and to analyze the impact of the inÆ ltration of the leachate from a neighbouring landÆ ll on some samples. Five wells were drilled to take sediments and water samples. The textural and mineralogical composition of the aquifer sediments was analysed and the chemical composition of groundwater was determined. The equilibrium relationship between the solid phase and groundwater was considered using speciÆ c computer codes. The achieved conclusions were that the chemical composition of groundwater is mainly due to calcite equilibrium and cationic exchange with calcium uptake and sodium release. The dissolution of amorphous silica minerals, and subordinate silicate hydrolysis, are responsible of the characteristic high dissolved silica concentrations. High chloride and nitrate contents result from leachate infiltration, but the main geochemical processes in the mix are the same.
Fe and Mn retention in natural water by adsorption-oxidation on clinoptilolite
Authors: Cuchimaque Lugo Carolina , Vargas Fiallo Luz Yolanda , Ríos Reyes Carlos Alberto
Published: November 2023

In the present work of investigation the efficiency in the Fe and Mn removal of the natural water is verified ed by the use of adsorbent means that consist of natural zeolite (clinoptilolite), recovered with Fe2O3 and MnO2 starting from FeCl3 and MnSO4, respectively. The zeolite by its great capacity of cation interchange is an excellent support of these oxides. The mechanism of the removal is by adsorption-oxidation of these metals on the surface of the oxide layer that covers the grain with zeolite. In the removal tests by means of a filtration system the variable pH were studied, as well as the Fe and Mn concentrations, flow in the affluent and height of the layer of the zeolite, being the last two being those of more relevance in the removal. Concentrations of 1.0-7.0 mg/L for Fe and 0.5-3.0 mg/L for Mn were used, in a rank of pH of 6.0-8.0. The efficiency of the removal diminishes with the increase in the Fe concentration, especially to high values of pH (> 7.5), by the formation of precipitated of Fe2O3 causing acceleration in the saturation of mean. A significant difference was not obtained both on the removal withthe use of types of covering, although to high concentrations of these metals, with the Fe2O3 layer a little greater percentage of removal were obtained, but the disadvantage is that with this oxide type smaller race of the filters was obtained by the saturation of the means.
Revamping strategy of diversified industry of sugar cane for combined production of bioetanol and co-products
Authors: Morales-Zamora Marlén , González-Suárez Erenio , Mesa-Garriga Leyanis , Castro Eulogio
Published: November 2023

Given the current conditions of Latin American Economy, scientific results have shown a marked interest not only to find out variation effects on raw material but also to find out technologic-energetic-economic efficiency of processes. They have also tried to asses alternatives so as to intensify and revamp industrial plants. These plants will be supposed to match the requirements and current availabilities of raw material and energy carriers.
The work proposes a strategy for revamping of facilities in process industry whit the incorporation of new energy and environmentally efficient productions like is study case of bioetanol production and co-products from bagasse of sugar cane considering the analysis of useful life of equipment as well as the integration of processes. The revamping is analyzed in furfural plant of bagasse with the incorporation of ethanol technology of lignocellullosic residual from the best results obtained. The mass and energy balances are determined in processes; the economic impact of revamping is analyzed whit the incorporation of bioetanol production and co-products from bagasse with the use of capacities and the existent facilities in the derived industry of sugar cane.
Optimization of injection molding process parameters by a hybrid of artificial neural network and artificial bee colony algorithm
Authors: Alvarado Iniesta Alejandro , García Alcaraz Jorge L. , Rodríguez Borbón Manuel Iván
Published: November 2023

This paper presents a hybrid of artificial neural networks and artificial bee colony algorithm to optimize the process parameters in injection molding with the aim of minimize warpage of plastic products. A feedforward neural network is employed to obtain a mathematical relationship between the process parameters and the optimization goal. Artificial bee colony algorithm is used to find the optimal set of process parameters values that would result in the optimal solution. An experimental case is presented by coupling Moldflow simulations along with the intelligent schemes in order to validate the proposed approach. Melt temperature, mold temperature, packing pressure, packing time, and cooling time are considered as the design variables. Results revealed the proposed approach can efficiently support engineers to determine the optimal process parameters and achieve competitive advantages in terms of quality and costs.
Study microstructure and composition of oxidation in steam at 700 and 750°C of austenitic steels AISI 304, 316 and 317
Authors: Marulanda José Luddey , Castañeda Saúl Isaac , Perez Francisco Javier
Published: November 2023

We have investigated the oxidation of austenitic stainless steels AISI SAE: 304, 316 and 317, at temperatures of 700 to 750°C in an atmosphere approaching 100% of steam, and in a time range of 10 to 1000h of exposure. The purpose is to check the quality of austenitic steels and studying the morphology, composition and structure of the phases of the layers formed on the oxide scale samples by scanning electron microscopy (SEM), X-ray analysis energy dispersive (EDAX) and X-ray Diffraction (XRD), respectively. Just as well, has been performed at different times, a systematic study of Thermogravimetry of the samples oxidized, which was observed that the AISI 304 steel had the lowest mass gain and the AISI 316 steel had the higher mass gain respect to the three steels of the work. Additionally we carried out a theoretical study of thermodynamic simulation of steam oxidation of three steels, under the same experimental conditions and by the Thermo-calc program. In the oxidized steels have been checked the presence of oxide phase structures such as Fe2O3, the protective mixed spinels Fe3O4 and Cr2NiO4, and mixed oxides of type (CrxFey)2O3, (Fe,Cr,Mn)3O4 and Ni6MnO8. Finally, it was discusses a possible mechanism of formation of oxide layers of the samples tested.
Изучение липолитически активных штаммов азотфиксирующих бактерий и оценка их фитостимулирующих свойств
Authors:   МИРЭА - Российский технологический университет, Институт тонких химических технологий им. М.В. Ломоносова, Родионов Е.М. , Бошляков Г.С. , Гришина Е.В. , Пайбердин А.О. , Пак Д.В. , Петрова А.М. , Юрина И.А.
Published: November 2023

В ходе работы из образцов почвы Ботанического сада РГАУ-МСХА им. К.А. Тимирязева были получены чистые культуры азотфиксирующих липолитически активных бактерий. Изучены их макро- и микроморфологические свойства и подобраны оптимальные концентрации твин-80. Культуры на агаре представляли собой бесцветные слизистые колонии, клетки - грамотрицательные неспоспорообразующие бациллы. Почва образцов - суглинистая, без карбонатов со слабокислым рН. Так как из каждого из образцов почвы удалось выделить липолитически активные азотфиксирующие микроорганизмы, это говорит о том, что их в дальнейшем можно искать на преимущественно суглинистых почвах. Оценка липолитической активности показала, что наибольшей активностью обладают штаммы, ассоциированные с Q. robur, F. carica, Fabaceae spp., что делает их перспективными продуцентами липаз в биотехнологическом производстве [1]. Была оптимизирована плотная питательная среда для культивирования выделенных чистых культур с помощью добавления к ней отвара бобовых, что может быть использовано в дальнейшем производстве при подготовке инокулята культуры перед культивированием в биореакторе. Обнаружено, что культуры, ассоциированные с S. aucuparia, Fabaceae spp. вступают в антагонистические отношения с фитопатогенной бактерией P. chlororaphis, все культуры накапливают сидерофоры - родственники азотобактина в ответ на антигены S. aureus, E. coli, B. subtillis, P. chlororaphis. Регистрация спектров флуоресценции происходила при длине волны 490 нм на анализаторе жидкости Флюорат-02-Панорама (спектрофлуориметр). По результатам спектрофлуориметрии были получены спектры испускания данных образцов, на которых наблюдался пик при длине волны 350 нм, что соответствует литературным данным по азотобактину. Данные штаммы являются перспективными агентами биоконтроля с/х культур. [3] Были выполнены опыты, направленные на изучение агрономического потенциала микроорганизмов в качестве удобрений. Введение суспензий микроорганизмов в почву привело к улучшению роста семян парижского корнишона по сравнению с ростом семян в почве с добавлением Азотовита®. С помощью метода масс-спектрометрии с высокой достоверностью было определено, что два исследуемых штамма относятся к A. radiobacter. Используя данные штаммы, возможно разработать новые, устойчивые к внешним факторам, с/х культуры. [2]
Предварительные данные о флоре цианобактерий российских вод Финского залива Балтийского моря
Authors:   Российский государственный педагогический университет им. А.И. Герцена, Горин К.К. ,   Ботанический институт РАН им. В.Л. Комарова
Published: November 2023

Цианобактерии – важная для водных экосистем группа фотоавтотрофных организмов, роль которой в вегетационный период зачастую является определяющей для биотопов Финского залива. Изучение их флоры не утратило своей актуальности. На протяжении всего периода исследований микроводорослей этого района, планктонные цианобактерии чаще всего являлись объектами комплексных гидробиологических исследований, осуществляющихся при строительных, гидротехнических, природоохранных и других работах, а также мониторинге в акватории залива [4,5,6,7]. Исследования бентосных сообществ микроводорослей имели скорее эпизодический характер, и к настоящему времени, сведения о их видовом составе в восточной части Финского залива ограничивались небольшим числом публикаций [1,2,3]. Материалом для настоящей работы послужили пробы, собранные летом в период с 2017 по 2021 гг. на станциях в прибрежных зонах северного и южного побережий Финского залива, архипелага Берёзовые острова, а также островов Гогланд и Мощный. В результате инвентаризации таксономического состава, по оригинальным и литературным данным, составлен список из 243 видов и внутривидовых таксона цианобакторий из 77 родов, 31 семейства, 13 порядков и одного класса. Наибольшим количеством видов представлены порядки Chroococcales и Nostocales - 74 и 67 видов, соответственно. Меньшее количество видов включали порядки Oscillatoriales (37 видов), Synechococcales (17 видов), Leptolyngbyales (14 видов) и Pseudanabaenales (12 видов). Остальные порядки содержали от 1 до 6 видов. По отношению к местообитанию выявлено 104 планктонных вида, 80 бентосных видов, произрастающих на различных субстратах. Планктонно-бентосные цианопрокариоты были представлены 58 видами, в основном это представители родов Chroococcus Nägeli, Merismopedia Meyen, Lyngbya C.Agardh ex Gomont, Oscillatoria Oscillatoria Vaucher ex Gomont, Phormidium Kützing ex Gomont, и др. 4 вида являлись эндоглойными, живущими в слизи других цианобактерий и водорослей. Для 173 видов были установлены галобные характеристики. Большинство из них – 81 вид являлись пресноводно-солоноватоводными. На втором месте по количеству видов были пресноводные цианобактерии - 67 видов. Доля солановатоводно-морских видов во флоре была не высока и составляла 5% - 13 видов. Всего 3% видов от общего числа относятся к эвригалинным и способны произрастать в широком диапазоне солёности. По составу зонально-географических элементов были выявлены виды являющиеся аркто-бореальными, бореальными, бореально-тропическим, голарктическими, голарктическо-тропическими, голарктическо-палеотропическими, голарктическо-неотропическими, голарктическо-австралийскими, и космополитными.
Сохранение ценного вида Castanea dentata Borkh. в Главном ботаническом саду РАН
Authors:   Главный ботанический сад им. Н.В. Цицина РАН, Соколова В.В.
Published: November 2023

Каштан зубчатый достигал на родине в восточной части Северной Америки 36 м в высоту с диаметром ствола 1,5 м и был доминирующей породой. Однако, из-за появления эндотиевого рака (Cryphonectria parasitica Murrill Barr.) в начале прошлого века погибло подавляющее число его популяций [5]. В Америке действуют программы по восстановлению популяций каштана зубчатого путем скрещивания с родственными устойчивыми видами [2, 3] и получения трансгенных растений [4]. В Главном ботаническом саду каштан зубчатый был посажен Алексеем Константиновичем Скворцовым. Семена были получены в 1988 г. из сада усадьбы Мичурина (г. Мичуринск) [1]. В настоящее время сохранились два экземпляра каштана. Одно из деревьев одноствольное с диаметром ствола 15 см и высотой 7 м, образует невыполненные плоды. Второе дерево двуствольное, с диаметрами 21 и 23 см и высотой 14 м, образует полноценные плоды, максимальная масса ореха – 6 г, средняя – 2,4 г. Урожайность фертильного дерева без специальных агротехнических мероприятий составляет 2-3 кг, однако она может повышаться с возрастом. Лабораторная всхожесть орехов при искусственной стратификации составляет 28-35%. В последние годы нами предпринимаются попытки размножения каштана как семенным, так и вегетативными способами. Совместно с РГАУ-МСХА им. К.А. Тимирязева проводилось черенкование полуодревесневшими побегами с последующим укоренением в теплице с мелкодисперсным распылением воды и подогревом почвы. Также мы проводили размножение воздушными отводками. В обоих случаях укоренялись только единичные черенки, при этом отмечалось активное образование каллусной ткани. С 2015 г. ежегодно начал образовываться самосев в количестве 20-30 особей, которые мы передаем в другие ботанические учреждения. Введение данного вида в культуру в условиях Средней России позволит сохранить его как биологический вид. Работа выполнена в рамках госзадания ГБС РАН «Биологическое разнообразие природной и культурной флоры: фундаментальные и прикладные вопросы изучения и сохранения» (№122042700002-6).
THE CONCEPT OF TERROIR: WHY IT MATTERS FOR UKRAINIAN WINE INDUSTRY?
Authors:   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Golovii V.F.
Published: November 2023

This paper explores the crucial role of terroir in Ukrainian winemaking's transition from traditional, quantity-focused models to innovative, quality-driven approaches. Against the backdrop of Ukraine's Eurointegration process, which compels wineries to reevaluate the significance of terroir, we examine the practical implications for the country's wine industry. A case study of "Shabo" Winery exemplifies the successful implementation of terroir-based strategies, displaying how they enhance the perceived value and distinctiveness of Ukrainian wines in both domestic and international markets. This research sheds light on the evolving landscape of Ukrainian winemaking and underscores the potential of terroir to elevate the industry's reputation and competitiveness. These findings offer valuable insights for wineries seeking to differentiate themselves and policymakers considering the role of terroir in shaping Ukraine's evolving wine industry
Thinking and labour (reading Vygotsky)
Authors: Maidansky A.D.
Published: November 2023

Lev Vygotsky connected the development of “higher forms of thinking” with labour, and claimed that this connection is “central and basic”, allowing to unfold the peculiarities of children’s thinking and the new in adolescent’s mind. Meanwhile, the concept of labour in Vygotsky’s works has not been investigated so far. This article traces the “genetic nodes that connect together the child’s thinking and practical activity” (Vygotsky), starting with “practical intelligence” and ending with labour. Thus, the development of the child’s psyche appears as its ingrowing into the process of social labour. According to Vygotsky, the speech of adults acts as an “ideal form” in dialogue with which the child’s speech develops; the same ideal form is constituted by labour. The child’s practical activity develops towards labour through the stages of playing, drawing, modelling and constructing. The article touches upon the problem of mastering affects by means of concepts, discusses the connection between the conceptual and real “fields” in human consciousness, and draws a parallel between the development of consciousness and labour.