bluuebunny/crossref_metadata_2025 huggingface dataset:
Karakteristik Fisik Bubuk Kopi Arabika Hasil Penggilingan Mekanis dengan Penambahan Jagung dan Beras Ketan
Authors: Syah Hendri , Yusmanizar Yusmanizar , Maulana Oki
Published: May 2023

Size reduction applied on Arabica Coffee bean may change its physical properties, where these properties are utilized for designing process including packaging and appliances for further processes. This research aims to investigate physical characteristics of Arabica coffee powder with addition of corn and rice milled through mechanical process. This experiment used two mechanical mills including hammer mill and disc mill. Before it is milled, coffee was mixed with other materials including corn and rice. Parameters observed were yield, moisture content, bulk density, and angle of respose, particle uniformity index, fineness modulus, and the average particle dimensions. Based on the results obtained, it was revealed that moisture content of each test still meet SNI standard with the maximum of 7%. Bulk density of coffee powder resulted using disc mill was higher compared with hammer mill. However, particle generated from milling process may be categorized as powder with medium cohesiveness based on its angle of repose. Dimensional average particle is proportional to the fineness modulus of coffee powder produced. Highest fineness modulus obtained from coffee powder without additives, and using a hammer mill is equal to 4.37 with the highest average dimensions of 2.05 mm, while the lowest fineness modulus that the coffee powder without any additional ingredients milled with a hammer mill is equal to 4.22, with the lowest average dimensions of 1.94 mm.
Pemanfaatan Pasta Sukun (Artocarpus altilis) pada Pembuatan Mi Kering
Authors: Safriani Novi , Moulana Ryan , Ferizal Ferizal
Published: May 2023

The aim of this study was to determine the best treatment combination between the ratio of wheat flour and breadfruit pasta, and the combination of the drying temperature and time to produce dried noodles with good quality and preferred by consumers. The effect of the ratio of wheat flour and breadfruit pasta (70:30%, 60:40%, and 50:50%), and the combination of the drying temperature and time (60°C, 70 minutes and 70°C, 60 minutes) on the quality of the dried noodles were investigated. The results showed that the best quality of the dried noodles based on the organoleptic and cooking quality test obtained from the combination of the treatment of ratio of wheat flour and breadfruit pasta = 70:30% and the combination of drying temperature and time = 700C for 60 minutes with the following characteristics: water content of 8,78%, fat content of 13,67%, protein content of 11.90%, ash content of 1,35%, and carbohydrate content of 65,22%. The organoleptic value of the best dried noodles before rehydration: color of 2,75; flavor of 2,83; texture of 2,73; whereas after the rehydration, the best dried noodles has organoleptic values: color of 2,81; flavor of 2,92; and taste of 2,77.
Mi Instan Berbasis Pati Sagu dan Ikan Patin serta Pendugaan Umur Simpan dengan Metode Akselerasi
Authors: Yusmarini Yusmarini , Pato Usman , Anirwan S , Siregar H
Published: May 2023

Instant noodle is favorite food in Indonesia. Instant noodle generally made from wheat flour, which is not Indonesian agricultural product. Diversification was needed to solve this problem, and sago starch is potential resource to develop. The research purposed are to produce instant noodle from sago starch and catfish meat fulfilling Indonesia instant noodle quality standard (SNI 01-3551-2000) and to predict instant noodle shelf time using accelerations method. Treatments in this research were SP0 (instant noodle from 100% sago starch), SP1 (instant noodle from 97.5% sago starch and 2.5% catfish meat), SP2 (instant noodle from 95% sago starch and 5% catfish meat), SP3 (instant noodle from 92.5% sago starch and 7.5% catfish meat), SP4 (instant noodle from 90% sago starch and 10% catfish meat), and SP5 (instant noodle from 87.5% sago starch and 12.5% catfish meat). Parameters measured were moisture content before and after frying, protein content, acid value, compactness, and the best treatment continued with shelf time using accelerations method. The result showed that all treatment significantly affected moisture content before and after frying, protein content, acid value and instant noodle compactness. The best treatment was instant noodle from 90% sago starch and catfish meat 10% (SP4) with moisture content before frying 11.29%, moisture content after frying 9.32%, protein content 10.90%, acid value 1.48 mg/g and instant noodle compactness 93.86%. Shelf time for SP4 was 35.81 days.Keywords: instant noodle, sago starch, catfish, accelerated method
Studi Performansi Alat Pemanas Air dengan Menggunakan Kolektor Surya Plat Datar
Authors: Darwin Darwin , Syah Hendri , Yadi Sujan
Published: May 2023

This study aims to analyze the performance of the water heater using solar collector flat plate type. Efficiency performance of solar collectors in the process of heating the water also becomes the main focus in this study. This study was conducted with two experiments consisting of a flat plate solar collector with horizontal and flat plate solar collector with tilt angle 22o. Experiments carried out with 8 hours of testing within 6 days. Water was circulated into the collector pipe using a pump capacity of 125 Watts. From the research it is known that the amount of electrical energy required by pump for 6 days with 8 -hour time trial experiment, was about 21.6 MJ. The rate of flow of the fluid in the collector pipe is 2x10 - 5 m3/s. The plate solar collector with a slope of 22o reached the highest average temperature in the third experiment, which was about 64.7 ° C; however, the lowest average temperature was found in the horizontal collector (0o) at the third experiment, which was about 47.5 ° C. It was found that the highest efficiency obtained at the collector plate with 22o tilt angle was equal to 76 % while the lowest efficiency was obtained at a horizontal collector with an efficiency of 53.6 %. Keywords: solar collectors, flat plate, water heater
Analisa Kelayakan Finansial Pengembangan Cold Storage Plant di Pelabuhan Perikanan Lampulo Baru Banda Aceh
Authors: Juanda Juanda , Martunis Martunis
Published: May 2023

The research aims to analyze financial feasibility of cold storage development in Lampulo Baru Fish Port Banda Aceh in accordance with discounted investment ctiteria; Net Present Value (NPV), Net Benefit Cost Ratio (NBCR), Gross Benefit Cost Ratio (GBCR) and payback period (PBP). The research was conducted in Lampulo Baru Fish Port on November 2013 – January 2014. Data was mainly collected by using survei and interview/ focus group discussion techniques. Data were analyzed by using financial analysis with investment criteria. The result of research showed that the development of cold storage plant in Lampulo Baru Fish Port with capacity of 80 ton fishes is financially feasible, indicated by discounted investment criteria values; NPV = IDR. 1,463,819,997,-. NBCR = 2.33, GBCR = 1.03,  and PBP = 2.33 years.
José Martí: Epochal Critique, Naturalistic Religiosity, and Deconstruction of the Western Modern Ethos
Authors: Zaldívar Batista Ariel , Enamorado Rodríguez Aldo
Published: May 2023

The article proposes a heuristic analysis of the spiritual and philosophical formation of José Martí, focusing on the qualitative specificity of his religiosity and its critical reflexivity in response to epochal problems. Using a logical, dialectical, and historical-philosophical methodology, the article examines the processes of semantic inversion, semiotic complementarity, and sigmoidal interactions of philosophical-religious concepts such as “Dios”, “Alma,” “Amor” y “Naturaleza” in José Martí’s representative works, including “Prólogo al poema del Niágara,” “Cuadernos de apuntes” y “Emerson.” Additionally, the article reveals the transgressive social functions of Martí’s religiosity in historical context, viewed from an axiological, ideological, critical, prospective, and heuristic perspective.
Keywords: José Martí; Epochal Criticality; Naturalistic Religiosity; Cultural Ethos; Western Modernity.
Influencia del estrés laboral en la dinámica familiar
Authors: Moreira Arteaga Gema Junán , Antón Vera Gustavo
Published: May 2023

El estrés laboral es un problema reconocido a nivel mundial. Las cifras de este problema van en aumento en los países latinos, y su tendencia a la cronicidad es muy importante en el contexto de la salud y el bienestar. Esta situación ha hecho que las implicaciones en el núcleo familiar sean estudiadas y medidas desde las dimensiones de las dinámicas y relaciones interpersonales, considerando la relación que existe entre las condiciones laborales y el bienestar de la familia. Se agregan también aspectos como la convivencia, la crianza y la comunicación. Por ello, se realizó una investigación no experimental, descriptiva, transversal, de enfoque mixto, basada en el paradigma sociocrítico. La población estuvo conformada por 60 personas correspondientes a las familias seleccionadas del Sector La Pepsi del cantón Santo Domingo. Se trabajó utilizando los métodos teóricos y empíricos. Como instrumentos de recolección se utilizaron la escala de estrés percibido en el trabajo, con la cual se pudo identificar los niveles de estrés de las personas encuestadas en el ámbito laboral, calificándolos en bajo, medio y alto. Además, se aplicó una encuesta con 10 preguntas de opción múltiple. Se encontró que en las personas encuestadas existe un nivel de estrés laboral de medio a alto. La mayoría de ellas reconoce que el trabajo y los niveles de estrés influyen en las dinámicas familiares, y que esto genera la necesidad de solicitar ayuda profesional, sobre todo porque esta no es una práctica que se realice con la frecuencia adecuada en las familias.

Palabras clave: Estrés laboral, familias, bienestar.
Modelo tecnológico basado en el empoderamiento digital para el desarrollo sostenible de bioempresas
Authors: Jiménez-Pitre Iris , Molina-Bolívar Geomar , Gámez Pitre Rodrigo
Published: May 2023

Las tecnologías han adquirido un valor incalculable en los procesos productivos de las naciones, estando presentes en cada uno de los procesos que se desarrollan para el crecimiento personal y de las naciones. Dada su importancia, es necesario crear modelos que enfaticen los mecanismos para su adecuado uso, ya que no se pueden explotar los recursos de ninguna índole sin reconocer las implicaciones que esto puede traer a la vida de las personas. Por lo tanto, este estudio tiene como objetivo proponer un modelo tecnológico para el desarrollo sostenible y el empoderamiento digital de las bioempresas. Se asumió una metodología mixta para procesar la información mediante la interpretación de las teorías y postulados que expertos han expuesto producto de años de investigaciones. Bajo el método cualitativo, se seleccionaron dos grupos (uno de trabajadores de bioempresas y docentes universitarios con perfil ambientalista) para aplicar una encuesta referida a los modelos tecnológicos y el empoderamiento digital. El primer grupo estuvo conformado por 123 sujetos y el segundo por 10. Los resultados mostraron que todo modelo productivo tecnificado debe contar con una visión económica, social, institucional y ambiental, además del conocimiento y las competencias tecnológicas por parte de quienes las implementan. Asimismo, se evidenció que todo modelo productivo basado en las TIC debe acogerse a los fundamentos epistemológicos, axiológicos y ontológicos, de manera que acoja procedimientos viables que vayan en concordancia con el conocimiento científico, los valores humanos y la razón del ser de los individuos.

Palabras clave: Tecnologías; desarrollo sostenible; empoderamiento digital.
Sexual and emotional jealousy in relation to the facial sexual dimorphism of a potential rival
Authors: Pavela Banai Irena , Kezić Kati , Banai Benjamin
Published: May 2023

Background and purpose: Previous studies have shown that men are more sensitive to sexual infidelity, while women are more sensitive to emotional infidelity. Studies have also shown that jealousy is evoked by the rival’s desirable characteristics. Therefore, it was assumed that women would be more jealous of a woman with a feminine face, while men would report greater levels of jealousy when presented with a rival with a masculine face. It was also predicted that these expected differences would depend on the infidelity type – sexual and emotional. Based on this, the aim of this study was to investigate differences in jealousy in relation to participants’ sex, the type of infidelity and the rival’s facial sexual dimorphism.
Materials and methods: The study included 401 (164 men and 237 women) participants, aged between 18 and 35. Jealousy was assessed by using hypothetical scenarios of a partner’s emotional and sexual infidelity that involved rivals with a masculine and feminine face. Participants reported the intensity of jealousy on a 7-point scale.
Results and conclusions: As predicted, men reported higher levels of jealousy over sexual, whereas women were more upset over emotional infidelity. Moreover, while there was no difference in jealousy among men in relation to the rival’s facial sexual dimorphism, women reported a higher intensity of jealousy toward a rival with a feminine face, regardless of the infidelity type. These results are interpreted by different adaptive mechanisms in men and women.
Evaluation of the ultrastructure and expression of desmoglein 2 in breast cancer: A novel biomarker
Authors: Mohammadhosseini Maryam , Mirzaei Hamidreza , Majd Ahmad , Farhadi Mona , Shayanfar Nasrin
Published: May 2023

Background and purpose: Breast cancer is the most common malignancy among Iranian women. In recent years, the study of dysfunction in the expression of cell-cell junction genes and the related proteins in the malignant process has been at the center of attention.
Materials and methods: In this study, 50 patients were selected who had both cancerous tissue and adjacent healthy tissue. The expression of the desmoglein 2 gene was evaluated. Healthy and cancerous tissue were compared using routine hematoxylin and eosin staining. The total protein was also compared between these two groups. The ultrastructural examination was performed.
Results: The real-time polymerase chain reaction results showed a decrease in the expression of the desmoglein 2 gene in all tumor samples compared to the healthy samples (p<0.0001). Besides, receiver operating characteristic curve analysis showed that the area under the curve was equal to 0.98. Transmission electron microscopy microscopic studies revealed a change in the status of desmosomal junctions.
Conclusions: Overall, the findings showed that the association between desmoglein 2 gene expression and alterations in cellular connections leads to impaired cellular connections, which is an important risk factor for breast cancer. This result proposed the understudy gene as a new biomarker in the development of breast cancer.
Testicular toxicity induced by T-2 toxin and protective effect of vitamin E in Wistar rats
Authors: Kumar Manoj , Lonare Milindmitra K. , Telang Avinash G.
Published: May 2023

Background and purpose: Mycotoxicosis is a very common problem in stored feed and fodder. Ingestion of T-2 toxin through feedstuff leads to serious consequences and production losses in exposed populations. That may lead to reproductive organ system damage resulting in the reproductive problem. The study was planned to investigate the effect of T-2 toxin and vitamin E on testicular function in Wistar rats.
Material and methods: Male Wistar rats were fed with standard rat feed. T-2 toxin treatment groups received T-2 toxin (2.5 ppm and 5.0 ppm) mixed feed, while vitamin E (100 mg/kg) was given by oral gavage alone and in T-2 toxin fed groups. After completion of 28 days of oral feeding of text compounds reproductive toxicity parameters were evaluated.
Results: Total live sperm counts, sperm motility, and serum testosterone levels were reduced in T-2 toxin-treated groups. Antioxidant enzymes/nonenzymes and oxidative stress indicators were altered significantly and cellular damage to testis and epididymis in T-2 toxin groups was in a dosedependent manner. However, vitamin E intervention caused a marked reversal effect in T-2 toxin-fed rats on testicular damage and male reproductive parameters. Oxidative stress and related events appear to be a potential mechanism involved in T-2 toxin-mediated testicular damage.
Conclusion: This study validated that the use of an optimum dose of vitamin E has the potential to protect against the testicular damage caused by the T-2 toxin.
Genetic analysis of transductional recombination in Escherichia coli reveals differences in the postsynaptic stages of RecBCD and RecFOR pathways
Authors: Zahradka Ksenija , Repar Jelena , Đermić Damir , Zahradka Davor
Published: May 2023

Background and purpose: Homologous recombination in Escherichia coli proceeds via two pathways, RecBCD and RecFOR, which use different enzymes for DNA end resection and loading of RecA recombinase. The postsynaptic reactions following RecA-mediated homologous pairing have mostly been studied within the RecBCD pathway. They involve RuvABC helicase/resolvase complex, RecG and RadA helicases that process recombination intermediates to produce recombinant DNA molecules. Also, RecG functionally interacts with the PriA protein in initiation of recombination-dependent replication. Here, we studied the individual and combined effects of ruvABC, recG and radA null mutations on transductional recombination in both pathways. The effect of the priA300 mutation, which acts as a suppressor of the recG mutation, was also tested. The goal was to characterize the postsynaptic stage of transductional recombination in more details, especially in the RecFOR pathway, which is less well-studied.
Materials and methods: Phage P1vir-mediated transduction was used to measure recombination efficiency in a series of recombination mutants. The proA+ marker was used for selection in transductional crosses with various ΔproA recipients.
Results: The ruvABC mutation moderately decreased recombination in both recombination pathways, while radA had no effect. The recG mutation reduced recombination in the RecBCD pathway but not in the RecFOR pathway. The strong recombination defect of recG radA double mutants in both pathways was completely suppressed by the priA300 mutation, and this suppression depended on the functional RuvABC complex.
Conclusions: RecG and RadA proteins have a redundant role in transductional recombination via RecFOR pathway. In both recombination pathways, RecG and RadA functionally interact with PriA, probably during initiation of recombination-dependent replication.
Why 3D in vitro cancer models are the future of cancer research?
Authors: Petrić Tina , Sabol Maja
Published: May 2023

Tumors are three-dimensional (3D) entities characterized by complex structural architecture which is necessary for adequate intercellular, intracellular and cell-to-matrix interactions among the aberrant cells in cancer. In the field of cancer research, 2D cell cultures are traditionally used for decades in the majority of experiments. The reasons for this are the vast benefits these models provide, including simplicity and cost effectiveness. However, it is now known that these models are exposed to much higher stiffness, they lose physiological extracellular matrix (ECM) on artificial plastic surfaces as well as differentiation, polarization and cell-cell communication. This leads to the loss of crucial cellular signaling pathways and changes in cell responses to stimuli when compared to in vivo conditions. Moreover, they cannot adequately mimic the complexity and dynamic interactions of the tumor microenvironment (TME) which is of great importance in anticancer drug treatments. 3D models seem more biomimetic compared to 2D cell monolayers because they offer the opportunity to model the cancer mass together with its environment which seems the key factor in promoting and directing cancer invasion. 3D cell culture with its additional dimensionality makes the difference in cellular responses because it influences the spatial and physical aspects of the cells in 3D culture. This affects the signal transduction and makes the behavior of 3D-cultured cells more physiologically relevant and reflective of in vivo cellular responses. This review focuses on major differences between 2D and 3D cell cultures, highlighting the importance of considering bioengineering humanized 3D cancer models as the future in cancer research. Additionally, it presents diverse 3D models currently used in cancer research, outlining their benefits and limitations. Precisely, this review highlights the differences between the 3D models with the focus on tumor stroma interactions, cell population and extracellular matrix composition providing methods and examples for each model from the studies done so far.
Miren’s Story
Authors: Pleiss Mark
Published: May 2023

Ten-year-old Miren Alonso was one of almost 4,000 Basque children evacuated from the Basque Country in northern Spain to Southampton, England by the Basque Government in May 1937, during the Spanish Civil War (1936-1939). This article, based on extensive oral testimony, provides a firsthand look at a historical event that remains largely unknown to most people. It is also one of only a few long-term studies of the evacuation from the perspective of an individual. This is a summary of Miren’s experience before, during, and after the evacuation, framed within the social, political, and historical context of the period. Her story is a remarkable account of what it was like to be a child refugee, separated from her parents and sent from a war-ravaged city into the care of strangers in a country with a language that she did not speak. It is also the account of what is was like to face the aftereffects of the evacuation and trauma of the Spanish Civil War. This is a story of tragedy on an almost incomprehensible scale, but also a story of resilience, human kindness, and the power of community.
Aguas subterráneas en América Latina y el Caribe: políticas y experiencias para la gestión y conservación de los acuíferos
Authors: Solís Ben
Published: May 2023

Las aguas subterráneas representan el 99% del agua dulce en el planeta y son un recurso natural que resulta fundamental para las actividades del ser humano. Su explotación permite satisfacer la demanda del recurso para distintos usos tales como el consumo humano, la industrial y la irrigación de cultivos. En América Latina y el Caribe, alrededor del 30% del agua dulce extraída proviene de fuentes subterráneas; sin embargo, existen actividades que la utilizan con mayor intensidad, como la industria (cuya demanda se abastece en un 50% con este tipo de fuente). Esta monografía aborda las características que hacen que las aguas subterráneas sean a la vez un reto y una oportunidad para la región. Por un lado, son un activo natural estratégico. Contribuyen a la actividad económica y al abastecimiento poblacional, teniendo un rol importante en el cumplimiento de los Objetivos de Desarrollo Sostenible, especialmente en el ámbito rural. Además, en el contexto de cambio climático, aportan una capacidad natural de almacenamiento que garantiza la resiliencia del servicio de agua ante eventos extremos, como sequías o interrupciones en el suministro por incremento en la turbidez de los ríos. Sin embargo, su característica de bienes de propiedad común convierte a las aguas subterráneas en un recurso particularmente expuesto a amenazas como la contaminación y la sobreexplotación. Por ello, es necesario que los países implementen una adecuada regulación que les permita garantizar la cantidad y calidad del recurso en los acuíferos y su disponibilidad en el futuro. El presente documento explora la importancia que tienen los recursos hídricos subterráneos en América Latina y el Caribe y reseña los instrumentos de gestión (tanto de la demanda como de la oferta), revisando experiencias en la región y proponiendo recomendaciones de política a manera de conclusión.
Ivan the Terrible’s Itinerarium: A Study of the Evidence
Authors: Erusalimskiy Konstantin
Published: May 2023

The study of sources on Ivan the Terrible’s travels and stays in capitals allows us to group the data into five types: certified acts (gramotas), narrative sources, registration data, ambassadorial documentation and memoria. A special section of the work proves the value of foreign sources, which do not form any special type in the classification. The acts of internal records provide very little information about Ivan the Terrible’s trips outside Moscow (6 % together with embassy documentation this percentage can be a little higher). At the same time, about 11 % of the localizations of the acts are of a formal nature and do not correspond to all the available information about the location of Ivan the Terrible at the time of their issuance. Narrative monuments have their own specifics. They are much more diverse than the acts: according the method elaborated for the case, 27 % of the exact localizations of official chronicles reflect the travels of the tsar and his family around the country. At the same time, the record books of the ranking department specify in detail (in some cases, day by day) the military campaigns in which Ivan Vasilievich personally took part. The difference between the early years of the reign under study from the “second half” of the reign only in the fact that the volume of record keeping over time increases, and the chronicle case comes to a standstill, and we have at our disposal a different range of verification sources. Chronicles are largely replaced by often far from accurate — despite their businesslike nature — certified gramotas, as well as sources of foreign origin. The total range of evidence studied is about 4 500 records (more or less precise dates / localizations), covering with varying completeness all periods of life of Ivan IV. It allows us to ask new questions about the movements of the Grand Duke and Tsar in Russia and abroad.
Children’s Magazine as an Interactive Project, or the Mailbox in Mauritius Wolff’s “Zadushevnoye Slovo”
Authors: Romashina Ekaterina
Published: May 2023

The article provides a thematic, structural and comparative analysis of the section “Mailbox” of the children’s magazine “Zadushevnoye slovo” (Sincere Word) (1876—1918, publisher M. Wolff). The texts reviewed represent an important and informative source on the history of everyday life and the history of childhood. The paper identifies the following forms of interaction between the editorial board and its readers: publication of letters with stories about family, favorite toys, travels, etc.; children’s questions and answers addressed to each other; entertaining tasks and their solutions; “prize” competitions (drawings, opinion essays), followed by sending out prize books and publication of winners’ names; questionnaires; personal appeals. The editorial board declared “developing the ability of children to express their thoughts and feelings correctly and coherently” as the aim of the column. The “answers and advice” section helped children to improve their writing skills; the framework provided a certain canon for communication. Being interactive, “Mailbox” stimulated interest in the magazine, attracted readers and increased the number of regular subscribers. However, its evaluation by literary critics and educators was and often remains negative.
English Familiars and their Owners: Scenes from “Family” Life
Authors: Togoeva Olga
Published: May 2023

English witchcraft pamphlets are a unique source within the vast corpus of European demonological literature of the Late Middle Ages and early Modern times. The pamphlets not only retold the details of real witchcraft processes, they also contained a huge number of details concerning the most diverse aspects of the everyday life of English society of the 16th — early 18th century. The article analyzes the features of the relationships that, according to the authors of the pamphlets, witches built with their household “spirits” — familiars, who were used to bring damage to the offenders. According to the author of the article, these relations were of a dual nature. On the one hand, familiars were the first and most important helpers for their mistresses. On the other hand, the aggression of the “spirits” could be directed not only at the witch’s neighbors, but also at herself. From this point of view, the author of the article sees many common features in the descriptions of English familiars and demons of possessed people who behaved identically towards their victims. Thus, the author comes to the conclusion that the descriptions of the everyday life of English witches of early Modern times and their familiars provide a key to understanding the origins of this phenomenon itself: apparently, the concept of “familiar” was born partly under the influence of the continental demonological tradition.
Fires in Russian Everyday Life of the 18th Century
Authors: Golubinsky Aleksey
Published: May 2023

The article is devoted to the characterization of a fire as an event, the information potential of historical sources associated with fires in Russian cities and villages of the 18th century, the causes of fires, fire-fighting household measures, compensatory measures in the city and in the countryside, by both the state and landowners, the specifics of fixing information in legislative acts, clerical sources and sources of personal origin. These documents make it possible to clarify the details of urban and rural everyday life, poorly expressed or poorly preserved in sources of a different nature.
The Ruling Elite in Russia at the End of the 15th — 17th Сenturies in Modern Russian and Foreign Historiography
Authors: Korzinin Alexander
Published: May 2023

The article is devoted to modern Russian and foreign historiography of the ruling elite (the Sovereign's Court) of the 16th — 17th centuries. The article analyzes both general special studies on the ruling elite and works that touch upon certain aspects of the history of the court (study of the genealogy of noble families, land ownership of the nobility, analysis of the history of boyar clans, participation of the elite in the court struggle, anthropological plots concerning the mentality, religious life, everyday life of the upper classes of Russian society). The paper notes nowadays a significant increase of interest in the study of the nobility, including the ruling elite. It is shown that the studies of the last decades are developing in line with those directions that were outlined in soviet and foreign historiography back to the 80s of 20th century Modern researchers of the history of the ruling elite pay great attention not only to the traditional institutional approach, but also to the study of informal relations in the court environment, inner—family ties, behavioral strategies at court, cultural needs, and religiosity of representatives of noble families. Particularly noted is the introduction into scientific circulation of a huge array of new sources for studying the composition and structure of the Sovereign's court, family ties, land ownership of the ruling elite, which creates favorable prerequisites for further study of this topic.
Projection of Robusta Coffee's Climate Suitability for Sustainable Indonesian Coffee Production
Authors: Sarvina Yeli , June Tania , Sutjahjo Surjono Hadi , Nurmalina Rita , Surmaini Elza
Published: May 2023

This study aims to analyze the impact of climate change on the climate suitability of Robusta coffee in five main Indonesian coffee production centers namely Aceh, North Sumatera, South Sumatera, Bengkulu and Lampung using the Maxent approach. The study used climate data, and climate projections from Worldclim and coffee location data from maps of Indonesia's main agricultural commodities. The results showed that Maxent had good performance in modeling the climatic suitability of Robusta coffee at the provincial level, and the corresponding production areas shifted with different patterns between provinces. The areas with suitable and highly suitable climates for Robusta coffee were projected to decrease in all provinces except for Bengkulu. The findings suggest a future challenge for Robusta coffee sustainability in Indonesia. Aceh, North Sumatera, South Sumatera, and Lampung need to develop adaptation strategies to anticipate the increasingly unsuitable environment. On the other hand, Bengkulu can be considered a new area for coffee plantation. The projection of the suitability of the coffee climate is crucial in determining the future coffee development areas and for the rejuvenation of the existing coffee plantations, highlighting the significance of the study's findings for policymakers, farmers, and other stakeholders.
O futuro da construção naval tradicional do médio e baixo Xingu, Pará
Authors: Faller Bruno Vilela , Amorin Rhayssa dos Santos , Jardim Isellino Nogueira
Published: May 2023

A arte de construir barcos de madeira é um patrimônio cultural secular dos povos amazônicos. Contudo, perdeu a importância ao longo das últimas décadas, como resultado, perda de conhecimento sobre a prática cultural da construção de embarcações de madeira. Assim, o objetivo do presente estudo foi conhecer a construção naval artesanal realizada nos municípios de Porto de Moz e Altamira. Para isso, empregou-se a entrevista semiestruturada, observação direta e indireta e emprego da máquina fotográfica. De acordo com os resultados encontrados, nota-se a predominância do sexo masculino, com idade média de 43,2 anos. A maioria dos carpinteiros navais tradicionais tem baixa escolaridade. Geralmente, o trabalho começa na infância ou na adolescência. Dezessete espécies foram citadas, itaúba e piquiá são as espécies mais versáteis e cobiçadas por carpinteiros para a construção de barcos. A comercialização das embarcações é limitada por fatores como a escassez de madeira certificada, desvalorização profissional e pela competição com embarcações fabricadas industrialmente. Estes fatores contribuem para a perda de conhecimento sobre a arte do saber-fazer da atividade de construção de barcos de madeira na região. Além disso, a diminuição da atividade provoca um amplo conjunto de impactos econômicos, sociais e culturais observados nos municípios de Altamira e Porto de Moz.
Determination of heat of transition ELC – isotropic bulk liquid
Authors: Popovskii A. Yu. , Mikhailenko V. I.
Published: May 2023

The temperature dependence of transition heat value ELC – isotropic bulk liquid was calculated in the framework of two-component theory of wall-adjacent layers of nonmesogenic liquids. This dependence is described by quadratic law because of dipole-dipole interaction between monomers. The experimental data for nitrobenzene layers near lyophilic substrate are in satisfactory agreement with the calculation results.
Physical and mechanical properties of polymer composites based on penton and disperse silver iodide
Authors: Shut M. I. , Rokitskiy M. A. , Rokitskaya G. V. , Shut A. M. , Levandovskiy V. V.
Published: May 2023

Experimental researches of the physical and mechanical properties and structure of penton – disperse silver iodide (AgI) polymer composite materials (PCM) with a dielectricsuperionic phase transition using ultrasound method have been carried out.
The results are discussed in terms of the proposed physical model and the model representation of the supramolecular structure dynamics changes and the ultrasound absorption dependences on the size of the structural inhomogeneities, depending on the filler content. The significant increase of PCM ultrasound absorption is detected with the filler concentration about 20-60% (vol.).
Validation of temperature conditions in graphite furnace – platform – bushing filter system of ET atomizer
Authors: Guravlev A. S. , Chernenko A. S. , Zaharia A. N. , Kalinchak V. V.
Published: May 2023

The heating of graphite furnace, Lvov’s platform and bushing-filter is studied experimentally and modeled theoretically. Comparison of substrat temperature history and transient signals of adsorption (Pb and Cd) allows us to draw a conclusion that adsorption signal arises when a substrate temperature rise up to certain value.
The laminar flame in combined dusts. Part IV. Experimental investigations of Al + Zr; Al + Mg; Al + Fe dusts
Authors: Boychuk L. V. , Shevchuk V. G. , Sidorov O. E. , Oparin A. S.
Published: May 2023

Normal flame propagation velocity is studied experimentally in binary suspensions of particles (Al + Zr; Al + Mg; Al + Fe) depending on the total concentration and composition. The experiments are fulfilled by use method of half-open vertical tubes, based on disaggregated particles- gas upward flow. The earlier developed model predictions compared with experimental data proves non-additivity of mixture flame velocity.
Flame spread over the film of the high-molecular compounds
Authors: Golovko V. V. , Nimich A. V. , Baronetskiy V. K.
Published: May 2023

The influence of plate diameter, azid-ethanol PMMA concentration and solution film thickness on flame propagation velocity and inert plate temperature is investigated. The effect of flame velocity decrease due to polymer concentration increase is discovered. It is related to heat loss, caused by endothermic reaction of decomposition. It is shown, that polymer solution film flame speed is determined not only by layers system thermal state, but also by fuel composition components chemical reaction kinetics.
Temperature dependence of ELC layer thickness 2. Two-component model
Authors: Mikhailenko V. I. , Popovskii A. Yu.
Published: May 2023

The calculation of temperature dependence of thickness of orientationally ordered nitrobenzene layer – ELC phase was done. The interlayer was bounded by dielectric solid substrates. We supposed that the factors which determine the ELC formation are the orientational interaction od liquid particles (dimers and monomers) as well as their interaction with solid substrate. Temperature increasing leads to layer-by-layer ELC melting. It means the decreasing of their equilibrium thickness with temperature and the order parameters of dimers and monomers remain practically constant. This fact gives us a possibility to calculate numerically the temperature dependence of ELC thickness..
Temperature dependence of the viscosity of the isobutyric acid-water solution along the critical isoconcentrate and phase interface
Authors: Alekhin O. D. , Ostapchuk Yu. L. , Rudnikov Ye. G. , Voiteshenko A. V.
Published: May 2023

The temperature dependences of regular and fluctuation parts of viscosity along critical isoconcentrate and phase interface have been studied on the basis of data of shear viscosity behavior of isobutyric acid-water solution near the critical consolute temperature. New method for studying the viscosity on separate branches of the coexistence curve has been proposed for the first time. The viscosity equation, which is connected with the correlation length of the system and takes into account the spatial dispersion, has been used for the experimental data analysis.
Welding fumes formation. V. Formation of final agglomerates.
Authors: Vishnyakov V. I. , Kiro S. A. , Oprya M. V. , Ennan A. A.
Published: May 2023

The dusty plasma behavior is studied in the process of coagulation of the primary particles, which are formed as a result of the nucleation and nuclei growth in the condensable hightemperature vapors. The study is concentrated to the example of the thermal plasma formed in the welding fume in the arc welding process where the electrodes covered with carbonatefluorite are used. The tendency to self-organization of such a plasma and formation of the ordered spatial structures of primary particles is demonstrated. The number densities of the primary particles in these structures are much higher than at uniform spatial distribution that causes the rapid coagulation of the fine nano-sized primary particles. The coagulation of the particles with size more 10 nm into cluster-like agglomerates occurs during almost all cooling period of aerosol up to the ambient air temperature. The coagulation of the ultra-fine particles (~2 nm) occurs in two stages: at first the chain-like agglomerates are formed rapidly, and then they associate with the cluster-like agglomerates. As a result, the final agglomerates (inhalable particles) have the bimodal size distribution.
Laser particle counters for environmental aerosol measurements
Authors: Kontush S. M. , Tshekatolina S. A. , Gugva A. Y. , Burlaka T. V.
Published: May 2023

Operation mechanism of developed laser particle counter, allowing to determine aerosol particles mass distribution, is described. Comparison is made with results, obtained via standard setup for deposition of particles on filter.
Determination of granulometric composition of powders by digital microscopy
Authors: Chernenko A. S. , Zinchenko Y. A. , Kalinchak V. V. , Kosolap N. V.
Published: May 2023

Digital microscopy method, which allows to determine countable and mass particle size distribution of powders, as well as their form coefficient distribution, is described. Automatic processing of distributions allows to determine the parameters of normal and log-normal distributions, distributions of Roller and Rasin-Ramler.
Anisotropy of thermal properties of carbon-filled epoxy composites formed in a magnetic field
Authors: Malezhyk P. M. , Shut N. I. , Sichkar T. G. , Lazarenko M. M. , Shut A. M.
Published: May 2023

The investigation of specific heat capacity of unfilled epoxy resin and filled with ED20 multiwalled carbon nanotubes, prepared in СMF. It is shown that the heat capacity temperature dependencies demonstrate its anisotropy and influence of the magnetic field direction on the relaxation processes in the glassy and in the rubbery state, for samples prepared along and crosswise СMF in comparison with control samples.
Influence of initial parameters of gas and pulverized coal particles on burning characteristics in tuyere hearth
Authors: Kalinchak V. V. , Zinchenko Yu. A. , Chernenko A. S. , Kuzemko R. D.
Published: May 2023

Combustion of coke particles in the tuyere hearth is modeled taking into account Stephan flow, kinetics of oxidation and carbon gasification reactions, homogeneous oxidation reaction of carbon monoxide, turbulent heat and mass transfer and radiation heat transfer. Coal dust is blown by flow of hot oxygen-enriched air. Dependences are obtained, which allow to estimate the effect of coal dust mass concentration, coal particle size, temperature and mass fraction of oxygen in the air on mechanical burn-out, oxygen zone length and the gas composition. When choosing the optimum ratio between the particles diameter and the mass flow rate should be guided by a factor of excess oxygen in the feed mixture equal to 1.1-1.2.
The relationship between equations of state for small fluctuation-disperse systems and effect of gravity in macro-systems under the critical condition
Authors: Alekhin A. D.
Published: May 2023

The fluctuation-dispersed structure of small limited systems in critical condition is proposed on the basis of macro-systems phase transitions fluctuation theory. A distinctive feature of this structure is the equality of the number of order parameter fluctuations Nf(s) in the surface layer s = 4πl2 with the thiсkness l and the number of order parameter fluctuations Nf(v) in volume v = 4/3⋅π(l−2Rc)3. Based on this equation the linear size of a small spherical system have been evaluated, the relationship between the thermodynamic parameters has been determined – the temperature and the chemical potential with the linear size of the system which are similar to relations of M. Fisher t~1−1/ν, μ~l−1/ξ. Based on the quality similarities of the non-monotonic temperature dependences of various properties of macroinhomogeneous systems in the Earth gravity field and the non-monotonic temperature dependences of small confined systems properties under critical condition the equation of state has been proposed for small confined systems. This equation has been tested on the basis of experimental data from various properties of small confined systems.
Features of penton – AgI system thermal expansion
Authors: Shut M. I. , Rokitskaya G. V. , Rokitskiy M. A. , Shut A. M.
Published: May 2023

Studies of penton - AgI system polymer composite materials thermal expansion are fulfilled. The temperature and concentration dependences of the relative elongation and the composites linear thermal expansion coefficient are analyzed. Parameters of the lowtemperature and high-temperature components of polymer matrix glass transition process are determined. Due to abnormal dilatometric behavior of AgI the composites are produced with values of linear thermal expansion coefficient close to zero, and to the values of the corresponding coefficients for the low molecular weight materials.
The influence of ash-content pulverized coal particles on their burning characteristics in tuyere hearth
Authors: Каlіnchak V. V. , Chernenko A. S. , Voloshin V. S. , Zinchenko Yu. A. , Kuzemko R. D.
Published: May 2023

Effect of ash content in coal dust on the burning characteristics in tuyere zone of blast furnace is studied. The ash is considered as an individual fraction in addition to two fractions of coal dust. It is shown, that the variation of pulverized coal fractional composition allows increase of carbon monoxide yield and fuel particles burnout. The presence of ash results in oxygen zone extension and increase of coke residue burnout. At the same time the total coal dust burnout is lower than that of low-ash coal. Fine pulverized coal combustion is characterized by increased production of carbon monoxide and reduction of carbon dioxide percentage.
Solar desiccant-evaporative cooling systems with ceramic packing (microporous multichannel structures)
Authors: Glauberman M. , Doroshenko A. , Shestopalov K. , Liudnytskyi K. , Zhuk K. , Tsapushel A.
Published: May 2023

In this paper, a method for the determination of the efficiency and limitations of the evaporative cooling process is presented. Ceramic is employed as a packing material in the evaporative equipment. It is shown that the experimental efficiency of the ceramic packing is 10-20% higher as compared to packings made of aluminum foil and multichannel polycarbonate plates because of the absence of common liquid film on the packing surface, and due to the absolute wettability of the ceramic packing. Heat and mass transfer equipment for desiccant-evaporative cooling systems (direct and indirect evaporative coolers, cooling tower) utilizing ceramic structures has been developed.
Regularities in combustion of ash containing coal particles during ignition in heated air
Authors: Chernenko A. S. , Kalinchak V. V. , Korchagina M. N. , Kuzemko R. D. , Shevchuk V. G.
Published: May 2023

The effect of porous carbon particles initial diameter and density on the regularities of their temperature, diameter and density histories фтв the self-acceleration, quasi-stationary combustion and spontaneous extinction stages is studied at particles sizes exceeding the critical value of diameter, corresponding to the particle ignition in air. It is shown that at the burning stage, which begins after the self-acceleration stage and ends, when the diameter and density of particles extinction are reached, the descent rate of the product of the particle density and the diameter squared depends on the reactivity of the coal dust particles and does not depend on the initial conditions. An expression for the burning time of a porous coke particle is obtained and a new burning constant is introduced, which is determined by the properties and structure of the coal (activation energy, porosity).