bluuebunny/crossref_metadata_2025 huggingface dataset:
РОЗРОБКА І УЗГОДЖЕННЯ КОМПЛЕКСНОГО ГІДРАВЛІЧНОГО ПРИВОДА З МЕХАНІЗМАМИ ПЛІСИРУВАЛЬНОЇ МАШИНИ
Authors: КОРОТИЧ ОЛЬГА , ПОЛІЩУК АНДРІЙ , МАРЧЕНКО МАКСИМ , ЗОЛОТЕНКО ЕЛЛА , МИХАЙЛОВСЬКИЙ ЮРІЙ
Published: September 2024

В результаті проведеного аналізу конструкцій  технологічних машин легкої промисловості та безпосередньо плісирувальної техніки, а також їх приводів, виявлених недоліків і переваг, авторами розроблено комплексний гідравлічний привод плісирувальної машини, який включає в себе засіб розподілу руху робочої рідини на виконавчі механізми, сполучений з насосною установкою та гідроциліндрами виконавчих механізмів.
               Засіб розподілу руху робочої рідини на виконавчі механізми (гідравлічний розподільник) є оригінальною конструктивною розробкою стосовно технологічного процесу і циклограми роботи плісирувальної машини ножового-валкового типу. Три основні виконавчі механізми працюють циклічно послідовно-паралельно в різних фазах. Регулювання параметрів складок-плісе (їх глибини і ширини) можливо здійснити за допомогою регулювання діапазону руху поршнів гідроциліндрів.
               За розробленими схемами представлено детальний опис будови нового гідророзподільника та узгодження роботи комплексного гідравлічного привода з механізмами плісирувальної машини.
Гідравлічний розподільник нової конструкції може виконувати, як розподільну, так і  керуючу функцію розподілення робочої рідини одночасно на три гідродвигуна виконавчих механізмів згідно з циклограмою роботи плісирувальної машини та  може замінити  керовані автоматичні пристрої. 
Внаслідок зменшення кількості деталей у плісирувальній машині з розробленим комплексним гідравлічним приводом  спрощується її конструкція і технологія виготовлення в порівнянні з плісирувальними машинами електромеханічної дії за рахунок відсутності головного валу і механічних передач, які перетворюють і передають рухи від електродвигуна до виконавчих механізмів.
Конструктивний метод розробки гідророзподільника комплексного гідропривода плісирувальної машини може бути використаний для інших машин, що мають механізмами, які працюють в різних фазах циклограми.
Ключові слова: - комплексний гідравлічний привод, виконавчі механізми, плісирувальна машини, гідравлічний розподільник, циклова діаграма.
ВИКОРИСТАННЯ МАШИННОГО НАВЧАННЯ ДЛЯ ОБРОБКИ ДАНИХ НА МІКРОКОМП’ЮТЕРАХ
Authors: ГНАТЮК ОЛЕКСАНДР , СМОЛІНСЬКИЙ ЮРІЙ , ВИНТУ АРТУР
Published: September 2024

Machine learning is a data analysis method that automates the construction of an analytical model. It is a branch of artificial intelligence based on the idea that machines should be able to learn and adapt through experience. It is closely related to computational statistics, which makes predictions based on statistical data collected by a computer. It is sometimes confused with data mining, but that is more focused on analyzing intelligence data, while machine learning contains complex algorithms that are used mainly for prediction, where machine learning concentrates on predicting based on already known attributes obtained through training data, then data mining focuses more on finding unknown attributes in any data. attributes in any data. Machine learning applications may be associated with spam filtering, optical character recognition, and search engines. Machine learning uses data to determine which algorithm is best for generating results based on the quantity, quality, and nature of the data. This data is then used for intelligent analysis in various ways, such as recommendation systems such as similar products on eBay, personalized content on google plus pages, video ads on sites such as YouTube, and last but not least, suggestions from friends on Facebook. Machine learning and artificial intelligence can be used to solve business problems, namely: Automating repetitive tasks such as data entry, document processing and customer service. This frees up employees' time for more complex work. Optimization of business processes. ML/AI can analyze data to identify inefficiencies and optimize business processes, increasing company productivity. Service personalization. ML/AI helps analyze customer data to provide them with personalized offers, recommendations and support. Automation of answers to questions and anticipation of customer needs. Detection of fraudulent transactions and cyber security. Risk management.
ДОСЛІДЖЕННЯ МОЖЛИВОСТІ ПІДВИЩЕННЯ ТОЧНОСТІ ЗАХВАТНОГО ПРИСТРОЮ РОБОТА ЗА РАХУНОК КОМПЕНСУЮЧОЇ ЛАНКИ ЗАТИСКНОГО ВАЖЕЛЯ
Authors: Годунко Максим
Published: September 2024

В роботі наведено результати досліджень точності важільних захватних пристроїв, а саме похибки позиціонування деталі у їх затискних елементах, та запропоновано методику зменшення величини похибки зміщення деталі за рахунок компенсуючої ланки.
ЕФЕКТИВНІ СХОВИЩА ДАНИХ ДЛЯ РІШЕНЬ МАШИННОГО НАВЧАННЯ
Authors: ДАНЧАК ОРЕСТ , ВОЙТЮК АНДРІЙ
Published: September 2024

Awareness of the importance of using effective data warehouses to develop machine learning solutions in today's world is becoming increasingly relevant in connection with the growth of data volumes and the growing need for accurate and productive models. The article identifies major vital requirements for data storage systems to ensure effective data management in building machine learning solutions.
The study underscores the practical implications of rapid data access and minimal latency, reliable storage systems with robust backup and recovery mechanisms, high-level security, flexibility in handling different data types, and cost-effectiveness. These factors are not just theoretical considerations but directly impact the efficiency and success of machine learning solutions.
Together with describing the concepts of block storage and object storage, the article also compares major cloud platforms—AWS (Amazon Web Services), Microsoft Azure, and Google Cloud Platform (GCP)—each providing a comprehensive range of flexible and customizable storage, security, and data processing services. These platforms enable users to manage their information resources flexibly and efficiently, offering unique features that cater to the specific needs of machine learning applications. Understanding the nuances of each provider's offerings empowers engineers and researchers to make informed decisions that align with their unique requirements.
The article provides a thorough overview of the key considerations and available options, guiding strategic decisions to support machine learning initiatives effectively. Also the importance of staying up to date with the evolution of major platforms offerings is emphasized. In conclusion, selecting the proper data storage solution is critical for enhancing the performance, security, and cost-efficiency of machine learning models.
ПРОФЕСІЙНА РОЛЬ ВЧИТЕЛЯ У ЗАБЕЗПЕЧЕННІ ІНТЕГРАЦІЙНОЇ ОСВІТИ З ХАРЧУВАННЯ ТА ЗДОРОВ'Я УЧНІВ У ШКОЛАХ НОРВЕГІЇ
Authors: КОТУН КИРИЛ
Published: September 2024

Стаття присвячена аналізу ролі вчителя у забезпеченні здорового харчування та збереження здоров’я учнів у загальноосвітніх школах Норвегії. Особливу увагу приділено аналізу досліджень з викладання шкільного предмету «Їжа та здоров’я» у Скандинавських країнах, зокрема в Норвегії. Констатовано, що цей предмет відіграє ключову роль у формуванні здорових життєвих звичок учнів, розвиваючи не лише базові знання про харчування та фізичну активність, а й вміння критично мислити щодо вибору продуктів та розуміння впливу харчування на здоров’я. Обґрунтовано, що особливого значення набуває професійний розвиток вчителів, які викладають цей предмет, адже компетентність педагогів стає вирішальною для підготовки майбутнього покоління до життя у гармонії з природою і власним здоров’ям. Підвищення кваліфікації, ознайомлення з останніми дослідженнями та розвиток практичних навичок є ключовими для досягнення цієї мети. Виявлено, що важливість інтеграції предмету «Їжа та здоров’я» у шкільну програму підкреслюється не лише вимогами до освіти вчителів, а й необхідністю адаптації освітніх програм до сучасних умов. Результати досліджень вказують на зростаючу потребу у кваліфікованих вчителях з предметно-специфічною освітою, що становить важливий напрям для подальшого професійного розвитку педагогів у цій галузі. З’ясовано, що вчителі з предметно-специфічною освітою з предмету «Їжа та здоров’я» відчувають, що вони більш якісно виконують свою роботу, є більш задоволені викладанням, а також більше працюють над оновленням змісту предмета «Їжа та здоров’я», аніж вчителі без формальної освіти з цього напряму. Враховуючи важливість предметно-специфічної освіти вчителів для якісного викладання предмету «Їжа та здоров’я», з 2020 року в Норвегії введено магістерську спеціалізацію з напряму «Їжа та здоров’я» як частину основної педагогічної підготовки вчителів. Зроблено висновок, що як і залучення уваги до важливості здорового харчування та розвиток відповідних навичок в учнів, так і професійний розвиток учителів у цьому напрямі може не лише сприяти покращенню здоров’я нації, але й слугувати прикладом для інших країн.
INTERDISCIPLINARY INTERACTIONS IN APPLIED LINGUISTICS: A CANADIAN PERSPECTIVE
Authors: PRYDOLOBA ANASTASIIA
Published: September 2024

The article analyzes applied linguistics as a field of knowledge in the Canadian experience and its interdisciplinary interactions. It is pointed out that interdisciplinary interaction with other sciences such as psychology, sociology, informatics, semiotics, cybernetics, etc. determined the evolution of linguistic research in recent decades. In the result of the integration of scientific efforts, such complex sciences as psycholinguistics, sociolinguistics, cognitive linguistics, computer linguistics, neurolinguistics, etc. have emerged. It is noted that the interdisciplinary interaction of applied linguistics contributes to its formation as a field of knowledge, enriching research and solving complex linguistic problems. It is established that the connection of applied linguistics with other scientific fields contributed to a comprehensive understanding of language and its use in various fields. The nature, advantages and influence of interdisciplinary connections of applied linguistics in Canada with other fields of knowledge are analyzed. In particular, the connection of applied linguistics with psychology offers an understanding of the cognitive processes involved in language acquisition. At their intersection, the subfield of psycholinguistics emerges. Leading researchers have identified psycholinguistics as the study of how people perceive, create, and understand language. It is noted that the interdisciplinary connection of applied linguistics and sociology solves the problems of language identity, diversity and the influence of social variables on language learning and use. It is determined that the connection of applied linguistics with information technologies, in particular with computational linguistics, contributes to the progress of computer-aided language learning (CALL) and innovative approaches to language learning.
It is highlighted that interdisciplinary collaborations in applied linguistics have many advantages, such as a deeper and more thorough comprehension of language-related problems, creative approaches to research, and the creation of workable solutions to real-world language problems.
Peran Keberagaman Gender terhadap Aktivitas Penghindaran Pajak: Political Connection sebagai Variabel Moderasi
Authors: Iswandari Veny , Mariya Waharini Faqiatul
Published: September 2024

Riset ini dilakukan untuk menganalisis dampak earnings management, financial distress dan keberagaman gender terhadap kecendurngan perusahaan terlibat dalam aktivitas manajemen pajak. Selain itu, studi ini juga menguji political connections sebagai variabel moderasi. Penelitian ini dilakukan di perusahaan yang masuk dalam sektor property dan real estate di Bursa efek Indonesia (BEI) pada periode 2018-2023. Sampel yang dipilih dengan metode pusposive sampling adalah 36 perusahaan, sehingga diperoleh total observasi sebanyak 216. Metode analisis yang digunakan adalah Multiple Regression analysis (MRA) dengan bantuan aplikasi Eviews 12.  Hasil analisis mengungkap bahwa manajemen laba tidak mempengaruhi aktivitas  penghindaran pajak, namun kesulitan keuangan dan keberagaman gender berpengaruh negatif terhadap penghindaran pajak. Sedangkan variabel koneksi politik tidak mampu memoderasi pengaruh manajemen laba, kesulitan keuangan dan proporsi perempuan dalam dewan terhadap penghindaran pajak. Sehingga hal yang dapat disimpulkan dari dari hasil penelitian ini adalah bahwa perusahaan sebaiknya menambah proporsi perempuan dalam jajaran dewan direksi karena dengan hadirnya perempuan dapat mengurangi praktik penghindaran pajak dan dapat meningkatkan kepatuhan perusahaan akan.Kata Kunci: Kesulitan keuangan; keberagaman gender; koneksi politik; manajemen laba
Potential for bioremediation of hydrocarbon-contaminated water by alkane-oxidizing actinobacteria
Authors: Romanova V.A. ,   Institute of Fundamental Medicine and Biology, Kazan Federal University, 18 Kremlevskaya Str., Kazan, 420008, Russia, Kupriyanova O.V. ,   Institute of Fundamental Medicine and Biology, Kazan Federal University, 18 Kremlevskaya Str., Kazan, 420008, Russia, Grigoryeva T.V. ,   Institute of Fundamental Medicine and Biology, Kazan Federal University, 18 Kremlevskaya Str., Kazan, 420008, Russia, Laikov A.V. ,   Institute of Fundamental Medicine and Biology, Kazan Federal University, 18 Kremlevskaya Str., Kazan, 420008, Russia
Published: September 2024

Water pollution with oil and its components is common in oil-producing and industrialized countries of the world. High molecular weight alkanes, constituting significant portion of oil, exist in a solid state at room temperature and exhibit resistance to decomposition when released into the environment. Bioremediation is the most promising technology for cleaning up hydrocarbon-contaminated aquatic ecosystems because of its environmental safety and economic efficiency. This article presents data on the potential for bioremediation of hydrocarbon-contaminated objects by the alkane-oxidizing bacterium Tsukamurella tyrosinosolvens PS2. Strain PS2 was isolated from petrochemical waste and showed a significant increase to 107 CFU/ml when cultivated on a mineral medium with solid paraffin as the sole source of carbon and energy. It was found that strain PS2 has high adhesion to liquid and solid alkanes, compared to cells grown in a medium with sucrose. The degree of decomposition of solid paraffin was evaluated using gas chromatography/mass spectrometry. The results indicated that strain PS2 metabolizes alkanes with a chain length of C20-C31 in 7 days with varying efficiencies. The findings of this study demonstrate the potential of the T. tyrosinosolvens PS2 strain for the bioremediation of sites contaminated with complex mixtures of hydrocarbons.
Studying the number of ammonium-oxidizing bacteria in bottom sediments of Lake Baikal
Authors: Semiguzov N.D. ,   Limnological Institute, Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya Str., Irkutsk, 664033, Russia, Kan G.V. ,   Limnological Institute, Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya Str., Irkutsk, 664033, Russia, Suslova M.Yu. ,   Limnological Institute, Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya Str., Irkutsk, 664033, Russia, Belykh O.I. ,   Limnological Institute, Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya Str., Irkutsk, 664033, Russia
Published: September 2024

Using the limiting dilution assay, the number of ammonium-oxidizing bacteria in the bottom sediments of the area of the Baikal Pulp and Paper Mill (BPPM, Southern Baikal) was determined. The maximum number of bacteria under study was determined at the station where treated wastewater from the city of Baikalsk is discharged into the lake.
Diversity of planktonic pro- and microeukaryotes in water bodies of the Volga-Don basin during the period of cyanobacterial bloom according to metabarcoding data
Authors: Umanskaya M.V. ,   Samara Federal Research Center RAS, Institute of Ecology of the Volga Basin RAS,  st. Komzina, 10, Tolyatti, 445003, Russia, Bykova S.V. ,   Samara Federal Research Center RAS, Institute of Ecology of the Volga Basin RAS,  st. Komzina, 10, Tolyatti, 445003, Russia, Gorbunov M.Yu. ,   Samara Federal Research Center RAS, Institute of Ecology of the Volga Basin RAS,  st. Komzina, 10, Tolyatti, 445003, Russia, Tarasova N.G. ,   Samara Federal Research Center RAS, Institute of Ecology of the Volga Basin RAS,  st. Komzina, 10, Tolyatti, 445003, Russia,   Institute of Biology of Inland Waters named after. I.D. Papanin RAS, pos. Borok, 109, Nekouz district, Yaroslavl region, 152742, Russia, Krasnova E.S. ,   Samara Federal Research Center RAS, Institute of Ecology of the Volga Basin RAS,  st. Komzina, 10, Tolyatti, 445003, Russia, Mukhortova O.V. ,   Samara Federal Research Center RAS, Institute of Ecology of the Volga Basin RAS,  st. Komzina, 10, Tolyatti, 445003, Russia,   Institute of Biology of Inland Waters named after. I.D. Papanin RAS, pos. Borok, 109, Nekouz district, Yaroslavl region, 152742, Russia, Sherysheva N.G. ,   Samara Federal Research Center RAS, Institute of Ecology of the Volga Basin RAS,  st. Komzina, 10, Tolyatti, 445003, Russia, Agapov A.A. ,   Samara Federal Research Center RAS, Institute of Ecology of the Volga Basin RAS,  st. Komzina, 10, Tolyatti, 445003, Russia
Published: September 2024

The first data on the phylogenetic diversity of planktonic communities of pro- and microeukaryotes in different types of water bodies of the Volga-Don basin during the period of cyanobacterial bloom are presented. Aphanizomenon flos-aquae/Dolichospermum flos-aquae blooms were found mainly in the Kuibyshev Reservoir; Planktothrix agardhii bloom was observed in floodplain lakes of the majority of investigated rivers. Bloom of Raphidiopsis raciborskii was found in a lake on the Volga River terrace, and in a pond in the floodplain of the Samara River Anabaenopsis dominated anong Cyanobacteria. Among heterotrophic prokaryotes, Proteobacteria, Bacteroidota, Verrucomicrobiota, Planctomycetota and Actinobacteriota predominate in the number of sequences, and among protists - Ciliophora, Gyrista (mainly Chrysophyceae), Cryptista and Myzozoa. During the period of cyanobacterial bloom, the contributions of Proteobacteria (especially, Burkholderiales and Pseudomonadales) and Actinobacteriota slightly decrease, while Myzozoa, on the contrary, increase. Monodominant blooms of various species of cyanobacteria significantly change the composition and structure of microbial communities, both at the OTUs and higher taxa levels. The plankton of the pond with Anabaenopsis bloom is most peculiar. Communities with blooms of P. agardhii, R. raciborskii and A. flos-aquae/D. flos-aquae are more similar to each other.
Diversity of microbial communities in long-term ice-covered water bodies of the Cold Pole region, Yakutia
Authors: Zakharova Yu.R. ,   Limnological Institute Siberian Branch of the Russian Academy of Sciences, Ulan-Batorskaya Str., 3, Irkutsk, 664033, Russia, Galachyants Yu.P. ,   Limnological Institute Siberian Branch of the Russian Academy of Sciences, Ulan-Batorskaya Str., 3, Irkutsk, 664033, Russia, Petrova D.P. ,   Limnological Institute Siberian Branch of the Russian Academy of Sciences, Ulan-Batorskaya Str., 3, Irkutsk, 664033, Russia, Mikhailov I.S. ,   Limnological Institute Siberian Branch of the Russian Academy of Sciences, Ulan-Batorskaya Str., 3, Irkutsk, 664033, Russia, Bedoshvili Ye.D. ,   Limnological Institute Siberian Branch of the Russian Academy of Sciences, Ulan-Batorskaya Str., 3, Irkutsk, 664033, Russia, Tomberg I.V. ,   Limnological Institute Siberian Branch of the Russian Academy of Sciences, Ulan-Batorskaya Str., 3, Irkutsk, 664033, Russia, Kopyrina L.I. ,   Institute for Biological Problems of Cryolithozone Siberian Branch of the Russian Academy of Sciences, Yakutsk, 677980, Russia, Likhoshway Ye.V. ,   Limnological Institute Siberian Branch of the Russian Academy of Sciences, Ulan-Batorskaya Str., 3, Irkutsk, 664033, Russia
Published: September 2024

Water bodies located in the north-east of Yakutia during the period of ice cover were studied. High-throughput sequencing of 16S rRNA gene libraries revealed a high taxonomic diversity of microbial communities in the studied ecotopes. The majority of the under-ice communities was represented by Proteobacteria, Actinobacteriota, Cyanobacteria, Verrucomicrobiota, Bacteroidota, and Planctomycetota. The difference in community diversity between deep-water lakes Labynkyr, Vodorazdelnoye, and Ulu, the source of the Labynkyr River, and shallow-water lakes Myamichi and Mertvoye, the mouth of the Labynkyr River, is shown.
Reconstruction of the geochemical evolution of the saline lake Shira (Southern Siberia, Russia) in the late Holocene
Authors: Amosova A.A. ,   Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences, Favorsky St., 1A, Irkutsk, 664033, Russia, Chubarov V.M. ,   Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences, Favorsky St., 1A, Irkutsk, 664033, Russia, Bezrukova E.V. ,   Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences, Favorsky St., 1A, Irkutsk, 664033, Russia
Published: September 2024

The paper presents reconstruction of the geochemical evolution of the saline lake Shira (South Siberia, Russia) over the past 3000 years based on the elemental composition of bottom sediments. Based on the rock-forming element contents obtained by X-ray fluorescence analysis, the main geochemical indices were calculated to assess the degree of deformation and weathering of the rocks in the catchment basin, paleosalinity, paleoclimate, paleoproductivity and input of clastic materials. Changes in Al2O3 and TiO2 contents reflect the influence of the terrigenous contribution in the lake basin and demonstrate four decreases in the terrigenous removal contribution in the age intervals of 40-135, 580-800, 1900-2020 and 2780-2850 cal. a BP. These intervals are characterized by decreases of Na2O, SiO2, K2O and Fe2O3 contents and increases of MgO and CaO contents. The deceleration in the processes of physical weathering of terrigenous material from banks into the lake and its removal by watercourses is confirmed by the increase of the paleosalinity index and the decrease of chemical weathering. The four considered intervals are characterized by high values of the Ti/Zr ratio, which corresponds to rocks formed close to the provenance area. For the interval 2780-2850 cal. a BP, the change of the Ti/Zr ratio value is not so contrasting in comparison to the intervals 40-135, 580-800 and 1900-2020 cal. a BP. The mineral composition of the bottom sediments of saline lake Shira corresponds to young and immature clay mineral with a high percentage of primary silicate minerals, formed under cold climate conditions.
Paleoenvironmental reconstruction of climate by diatoms from sediments of three deep freshwater lakes of Evenkia (Siberia, Russia)
Authors: Bolobanshchikova G.N. ,   Federal Research Center “Krasnoyarsk science Center” Siberian Branch of the Russian Academy of Sciences “Institute of Biophysics Siberian Branch of Russian Academy of Science” (IBP SB RAS) 660036, Krasnoyarsk, Akademgorodok, 50/50, Rogozin D.Y. ,   Federal Research Center “Krasnoyarsk science Center” Siberian Branch of the Russian Academy of Sciences “Institute of Biophysics Siberian Branch of Russian Academy of Science” (IBP SB RAS) 660036, Krasnoyarsk, Akademgorodok, 50/50,   Siberian Federal University 660041, Krasnoyarsk, Svobodny str., 79
Published: September 2024

The study aimed to determine the species composition of diatoms in the bottom sediments of the freshwater lakes Zapovednoye, Cheko, and Peyungda, situated in the taiga zone of the southern region of Evenkia within the boundaries of the Tungussky State Nature Reserve. A total of 255 taxa have been identified in these lakes, with their ecological characteristics also established. The diatom community present in the bottom sediments of the aforementioned lakes showcases species that are common across all three lakes, as well as some that are exclusive to every single reservoir. An examination of the acquired data indicated the existence of overarching trends in the evolutionary trajectory of lakes Cheko, Zapovednoye, and Peyungda. Nevertheless, discernible discrepancies are observed in the species composition of diatoms within their bottom sediments, both in terms of quality and quantity, thereby delineating Lake Peyungda in a distinctive position in comparison to lakes Zapovednoye and Cheko. This disparity is likely attributed to the relatively shallow depth of Lake Peyungda, leading to an inclination towards a heightened level of eutrophication in its species composition, as opposed to the conditions observed in lakes Cheko and Zapovednoye.
Middle Pleistocene history of vegetation in the Lotus Lake basin in the extreme south of the Russian Far East
Authors: Belyanin P.S. ,   The Pacific Geographical Institute of the Far Eastern Branch of the Russian Academy of Sciences, Radio Str., 7, Vladivostok, 690041, Russia, Belyanina N.I. ,   The Pacific Geographical Institute of the Far Eastern Branch of the Russian Academy of Sciences, Radio Str., 7, Vladivostok, 690041, Russia
Published: September 2024

The evolution of vegetation in the Lotus Lake basin in the Middle Pleistocene has been studied. Six phases of paleovegetation evolution based on palynological data have been identified. It has been established that in warm epochs correlating with MIS 11, 9 and 7 in the Lotus Lake Basin were dominated by broad-leaved and coniferous forests with a diverse species composition. Under cooling in MIS 10, the distribution of coniferous-small-leaved forests with the participation of shrubby birch increased. In MIS 8 and 6, the main type of vegetation was represented by coniferous-small-leaved forests with the dominance of pine, birch, spruce and the participation of elm and oak.
Vegetation and climate of southern Siberia in the Late Holocene at decadal resolution: a multiproxy study of the Lake Shira lacustrine sediments, Minusa Basin
Authors: Bezrukova E.V. ,   Vinogradov Institute of Geochemistry SB RAS, Favorsky St., 1A, Irkutsk, 66403, Russia, Reshetova S.A. ,   Vinogradov Institute of Geochemistry SB RAS, Favorsky St., 1A, Irkutsk, 66403, Russia, Amosova A.A. ,   Vinogradov Institute of Geochemistry SB RAS, Favorsky St., 1A, Irkutsk, 66403, Russia, Shchetnikov A.A. ,   Institute of the Earth Crust SB RAS, Lermontov St., 128, Irkutsk, 66403, Russia, Zykov V.V. ,   Institute of Biophysics SB RAS, Akademgorodok, 50, Krasnoyarsk, 660036, Russia, Chubarov V.M. ,   Vinogradov Institute of Geochemistry SB RAS, Favorsky St., 1A, Irkutsk, 66403, Russia, Bulkhin A.O. ,   Vinogradov Institute of Geochemistry SB RAS, Favorsky St., 1A, Irkutsk, 66403, Russia, Filinov I.A. ,   Vinogradov Institute of Geochemistry SB RAS, Favorsky St., 1A, Irkutsk, 66403, Russia, Krainov M.A. ,   Vinogradov Institute of Geochemistry SB RAS, Favorsky St., 1A, Irkutsk, 66403, Russia, Rogozin D.Y. ,   Institute of Biophysics SB RAS, Akademgorodok, 50, Krasnoyarsk, 660036, Russia
Published: September 2024

New AMS14C-dated records of changes in the natural environment of southern Siberia from varve sediments of Lake Shira (Minusinsk Basin) are presented. The results allow reconstructing the history of vegetation, biomes, climate, relative productivity of the lake system, changes in the lake catchment erosion, and water levels in the lake itself over the past 2980 cal. years with an average temporal resolution of 21 years. The new reconstructions indicate a wet regional climate between 2980 and 2650 cal yr BP and its gradual aridization later. At the same time, the climate of the basin itself was more arid, thus providing the development of steppe and meadow-steppe communities around the lake in the last 2980 years. Variations in the Artemisia/Chenopodiaceae pollen ratio, considered as an indicator of moisture available to plants, suggest a slight increase in the moisture level in the Minusa Basin from 2980 to 50 cal yr BP and its noticeable decrease in the last 50 years. Reconstructions show that changes in vegetation around Lake Shira in the Late Holocene were mainly caused by large-scale circulation processes that changed the regional moisture balance. Steppe vegetation turned out to be very sensitive to moisture changes on a decadal scale. No clear pollen indicators of anthropogenic impact on vegetation were found in the new pollen record.
Environmental conditions of the maximum phase of the Last Glaciation: reconstruction based on the studies of sediments of lakes Chukhlomskoye and Galichskoye
Authors: Borisova O.K. ,   Institute of Geography RAS, 29 building 4 Staromonetny lane, Moscow, 119017, Russia, Filippova K.G. ,   Institute of Geography RAS, 29 building 4 Staromonetny lane, Moscow, 119017, Russia, Konstantinov E.A. ,   Institute of Geography RAS, 29 building 4 Staromonetny lane, Moscow, 119017, Russia, Zakharov A.L. ,   Institute of Geography RAS, 29 building 4 Staromonetny lane, Moscow, 119017, Russia
Published: September 2024

The paper discusses new palynological data obtained from the bottom sediments of Lake Chukhlomskoye (Kostroma region). The location of the lake beyond the limits of the Late Valdaian ice sheet made it possible to reconstruct the vegetation changes during the maximum phase of the glaciation and compare them with previously obtained data from sediments of Lake Galichskoye. 25-21 thousand calibrated years BP, the region was occupied by open periglacial steppe with limited participation of birch and spruce open forests in the most protected habitats, with continuous spread of permafrost. Climatic reconstructions based on the modern geographical analogue of the fossil pollen flora indicate that mean annual temperature in the region was about ˗4 °C (7 °C below modern), and annual precipitation was at near-present level.
Classification of lakes of the Indigirka River basin and their current state
Authors: Levina S.N. ,   North-Eastern Federal University, Belinsky, 58, Yakutsk, 677000, Russia, Pestryakova L.A. ,   North-Eastern Federal University, Belinsky, 58, Yakutsk, 677000, Russia
Published: September 2024

Currently, classification plays an important role and importance as a method of scientific cognition and is one of the mandatory attributes in the knowledge of the world. Classification or typification are ways of grouping objects of research or observation according to their common characteristics. Currently, there are many different classifications in the scientific literature according to one or another feature, most of which are single-criteria or developed for a specific region. This paper presents the development of a regional ecological and limnological classification of the lakes of Yakutia on the example of the Indigirka River basin (RELK) according to the leading parameters (geographical, physico-chemical and hydrobiological). The development of the classification made it possible to study a large amount of factual material on the lakes of the Indigirka River basin, as a result of which data on the current state of the lakes of the poorly studied limnological region of the study were obtained.
The Holocene evolution of floodplain mire geosystems in the southeastern part of the Meshchera lowlands
Authors: Mazei N.G. ,   Lomonosov Moscow State University, Faculty of Geography, Leninskie Gory, 1, Moscow, 119991, Russia,   Institute of Geography of the Russian Academy of Sciences, 29 Staromonetny Lane, building 4, Moscow, 119017, Russia, Shatunov A.E. ,   Lomonosov Moscow State University, Faculty of Geography, Leninskie Gory, 1, Moscow, 119991, Russia,   Institute of Geography of the Russian Academy of Sciences, 29 Staromonetny Lane, building 4, Moscow, 119017, Russia, Novenko E.Yu. ,   Lomonosov Moscow State University, Faculty of Geography, Leninskie Gory, 1, Moscow, 119991, Russia,   Institute of Geography of the Russian Academy of Sciences, 29 Staromonetny Lane, building 4, Moscow, 119017, Russia
Published: September 2024

The results of paleoecological studies of peat deposits in the area of the southeastern part of the Meshchera lowlands (Mostovoye mire) based on the analyses of peat properties, plant macrofossils, charcoal, pollen and radiocarbon dating are presented. The mire was formed in the oxbow depression on the floodplain of the Goose River around 9480 cal. yr. BP and was eutrophic throughout most of the Holocene. Drastic changes in the dynamics of the mire, namely its transition to the mesotrophic stage, characterized by a decrease in the degree of peat decomposition, occurred about 70 years ago. The results of the pollen analysis show the existence of birch-pine forests in combination with shrub thickets formed by Betula nana in the period 9480-8750 cal. yr. BP. In the subsequent stages, the vegetation cover turned to a combination of broad-leaved, birch-pine forests and riverine forests with alder. Frequent fires, both natural and anthropogenic, have favored the development of birch and pine forests over the last millennium.
Iron sulfides in sediments of glacial lakes of the upper Kolyma region
Authors: Minyuk P.S. ,   North-East Interdisciplinary Scientific Research Institute N.A. Shilo FEB RAS, 16 Portovaya str., Magadan, 685000, Russia, Pozhidaeva D.K. ,   North-East Interdisciplinary Scientific Research Institute N.A. Shilo FEB RAS, 16 Portovaya str., Magadan, 685000, Russia, Sotskaya O.T. ,   North-East Interdisciplinary Scientific Research Institute N.A. Shilo FEB RAS, 16 Portovaya str., Magadan, 685000, Russia
Published: September 2024

Iron sulfides are common in the sediments of glacier lakes of the Magadan region -Gryazevoe (61°08’21” N, 152°19’57” E), Nalimnoe (61°07’41” N, 152°20’8” E), Sosednee (62°03’29” N, 149°3122” E), Sapog (63°29’9” N, 147°50’41” E), Vodorazdel’noe (63°44’8” N, 148°13’4” E), Ui (63°49’31” N, 147°53’21” E) and others. Most of the lakes were formed at the end of the Late Pleistocene or at the beginning of the Early Holocene. Sulfides occur in the spheroid forms with a framboidal structure, dusty clusters, and individual crystals. Sometimes sulfides fill up the diatom valves. The size of framboids does not exceed 100 µm. Sulfides have pyrite, greigite and pyrrhotite compositions. They are distributed unevenly in sections. Greigite and pyrrhotite are distinguished by their magnetic characteristics.
Reduced sulfur compounds in the bottom sediments of meromictic lakes
Authors: Losyuk G.N. ,   N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences, 20 Nikolsky Avenue, Arkhangelsk, 163020, Russian Federation, Kokryatskaya N.M. ,   N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences, 20 Nikolsky Avenue, Arkhangelsk, 163020, Russian Federation, Vakhrameeva E.A. ,   N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences, 20 Nikolsky Avenue, Arkhangelsk, 163020, Russian Federation, Popov S.S. ,   N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences, 20 Nikolsky Avenue, Arkhangelsk, 163020, Russian Federation
Published: September 2024

This paper presents data on the content of reduced sulfur compounds in the bottom sediments of two meromictic reservoirs: Mogilnoe Lake (Barents Sea) and Lake Trekhtsvetnoe (White Sea). A distinctive feature of both reservoirs is the high content of hydrogen sulfide in the anaerobic monimolimnion. The total content of reduced sulfur compounds, characterized by the ƩSH2S parameter, averaged 0.500% for Mogilnoe Lake and 0.994% for Lake Trekhtsvetnoe. The main form of sulfur for both lakes was pyrite (more than 60% for Mogilnoe Lake and up to 80% for Lake Trekhtsvetnoe). Significant amounts of sulfur associated with organic matter were noted in the surface layers. The contents of acid-soluble monosulfides and elemental sulfur were not significantly different (no more than 10% of ƩSH2S). This distribution of forms in the composition of ƩSH2S makes the bottom sediments of the studied lakes similar to sea sediments. The high level of accumulation of reduced sulfur compounds in sediments is due to their provision of a sufficient amount of organic matter, which comes mainly from the chemocline zone.
Diatom-based reconstruction of Lake Turgoyak (Southern Urals) ecosystem changes in the Holocene
Authors: Maslennikova A.V. ,   South Urals Federal Research Center of Mineralogy and Geoecology of the Urals Branch of the Russian Academy of Sciences, ter. Ilmeny Nature Reserve, Miass, Chelyabinsk region, 456317, Russia
Published: September 2024

Lake Turgoyak development through more than 12 thousand years was studied based on diatom analysis of the lake sediment core. Altogether 142 diatom taxa were identified. Four diatom zones corresponding to main stages of the lake ecosystem development were distinguished with application of stratigraphically constrained cluster analysis. It was found that in the period from 12.1 to 11.0 cal ka BP Lake Turgoyak had maximum salinity and a high degree of overgrowth with hydrophytes. Desalination and an increase in the lake depth occurred between 11.0 and 7.7 cal ka BP. Substantial fluctuations of the lake parameters about 8.0-7.0 cal ka BP were followed by period of lower flow rate and accumulation of sediments with a high content of organic matter. Approximately 2.7 ka cal BP the lake depth increased and salinity decreased. It was concluded that the chronological boundaries of the main stages of the lake ecosystem development coincide with the climatic events previously determined for the Holocene and Late Glacial of the Urals.
The influence of the Caspian Sea level fluctuations and river channels network dynamics in the Volga River delta on the location and development of Khazar settlements of the Semibugorinsky archaeological complex
Authors: Matlakhova E.Yu. ,   Lomonosov Moscow State University, Faculty of Geography, Leninskie Gory, 1, Moscow, 119991, Russia, Makshaev R.R. ,   Lomonosov Moscow State University, Faculty of Geography, Leninskie Gory, 1, Moscow, 119991, Russia, Lobacheva D.M. ,   Lomonosov Moscow State University, Faculty of Geography, Leninskie Gory, 1, Moscow, 119991, Russia, Lysenko E.I. ,   Lomonosov Moscow State University, Faculty of Geography, Leninskie Gory, 1, Moscow, 119991, Russia, Tkach A.A. ,   Lomonosov Moscow State University, Faculty of Geography, Leninskie Gory, 1, Moscow, 119991, Russia, Tkach N.T. ,   Lomonosov Moscow State University, Faculty of Geology, Leninskie Gory, 1, Moscow, 119991, Russia, Koten’kov S.A. ,   Shirshov Institute of Oceanology, Russian Academy of Sciences, Nakhimovsky Avenue, 36, Moscow, 117997, Russia, Soloviev D.S. ,   LLC “Archeocenter”, pl. Lenina, 2, Astrakhan, 414000, Russia
Published: September 2024

The results of the comprehensive studies of ​​the Semibugorinsky archaeological complex in the central part of the Volga River delta make it possible to reconstruct the influence of the fluctuations of the Caspian Sea level and the dynamics of the channel network at the development of Khazar settlements in the 6th-10th centuries. During the period of the Caspian Sea level rise (-24 m abs.), part of the population, presumably, moved to the Baer knolls, which at that time became islands. The Volga River delta was located at the higher levels, which could lead to the resettlement of the part of the population to its northern periphery.
On the question of the distribution of Coniferous Island in the north of the Central Kamchatka Depression in the Holocene
Authors: Mukhametshina E.O. ,   Institute of Geography, RAS, Moscow, Staromonetny lane, 29, bld. 4, 119017, Russia,   Geological Institute RAS, Moscow, Pyzhevsky lane 7, bld. 1, 119017, Russia, Shchekleina M.D. ,   Fersman Mineralogical Museum, Moscow, Leninsky avenue, 18, bld. 2, 119071, Russia
Published: September 2024

Despite the long history of studying the conifers dispersal in the Central Kamchatka Depression during the Holocene, the understanding of vegetation dynamics in the northern part of the depression is much weaker due to the lack of palynological sections. Pollen analysis of a peat section located to the southwestern of Shiveluch volcano allowed an assessment of the "Coniferous Island’s" expansion dynamics in the northern part of the Central Kamchatka Depression. According to the data obtained, the expansion of larch forests in this area began about 700 cal. yrs. BP, i.e. 100-150 yrs. later than in the southern part of the depression. Spruce, which replaces larch during succession, began to spread here about 400 cal. yrs. BP, as in the rest of the depression.
A preliminary study of subfossil Cladocera from the bottom sediments of Lake Bolshoe Miassovo (Southern Urals, Russia)
Authors: Nigmatullin N.M. ,   Kazan Federal University, Kremlyovskaya Str., 4/5, Kazan, 420008, Russia, Nurgaliev D.K. ,   Kazan Federal University, Kremlyovskaya Str., 4/5, Kazan, 420008, Russia, Frolova L.A. ,   Kazan Federal University, Kremlyovskaya Str., 4/5, Kazan, 420008, Russia,   Institute of archaeology and ethnography of the Russian Academy of Sciences, Acad. Lavrentiev Avenue 17, Novosibirsk, 630090, Russia
Published: September 2024

An analysis of subfossil cladocerans from the sediment core of Lake Bolshoe Miassovo (Southern Urals) was conducted. In all, 38 cladoceran taxa from 7 families were identified. Most of them fell within the family Chydoridae. Yet, another family, Bosminidae, turned out to be represented by the largest number of individuals. The assemblage was dominated by Bosmina (Eubosmina) longispina. Relatively high concentrations were also characteristic of the Daphnia longispina gr., Chydorus сf. sphaericus, and Alona quadrangularis. The age of the studied core spans the Late glacial and entire Holocene, the maximum age of the sediment core was 13.5 yr BP (Valieva et al., 2023). In the lower layers of the core at the beginning of the Holocene, the discovered Cladocera remains were few and characterized by low species richness. The most significant transformations in the Cladocera community occurred at the end of the Late Dryas - beginning of the Holocene (11400-11950 cal. yr BP), indicating substantial changes in environmental conditions.
Modern sedimentation in lakes Chukcha and Bezymyanka, Okhotsk coast
Authors: Pozhidaeva D.K. ,   North-East Interdisciplinary Scientific Research Institute n.a. N.A. Shilo, Far East Branch of Russian Academy of Sciences, 16 Portovaya St., Magadan, 685000, Russia,   Kazan Federal University, Institute of Geology and Petroleum Technologies, 4/5 Kremlevskaya st., Kazan 420008, Russia, Minyuk P.S. ,   North-East Interdisciplinary Scientific Research Institute n.a. N.A. Shilo, Far East Branch of Russian Academy of Sciences, 16 Portovaya St., Magadan, 685000, Russia
Published: September 2024

Lakes Chukcha (59°31’56” N; 147° 23’07” E) and Bezymyanka (59°29’56” N; 147°21’02” E) located in the Kava-Taui depression, in the norther cost of Sea of Okhotsk. The thickness of the sediments, rock magnetic properties, sedimentation rates in both lakes are different. The surface bottom sediments of Chukcha lake are heterogeneous in grain composition. The rock magnetic properties of surface sediments are controlled by the grain size. The shallow water sandy sediments show the low of MS, Jrs, Js, and high values of Jp while silt have opposite characteristics. Magnetic minerals from silt are single domain with low content of paramagnetic component. The magnetic properties of fine-grained sediments may be associated with the authigenic (hemogenic) iron sulfides and oxides.
Diatoms in a sediment core of Lake Raifskoye (Volzhsko-Kamsky Nature Reserve, Republic of Tatarstan): lake development over the past 1200 years
Authors: Palagushkina O.V. ,   Kazan (Volga region) Federal University, Kremlevskaya street, 18, Kazan, 420008, Russia, Li H.C. ,   Department of Geosciences, National Taiwan University Taipei, 106, Taiwan, ROC, Unkovskaya E.N. ,   Volzhsko-Kamsky State Natural Biosphere Reserve, Republic of Tatarstan, Zelenodolsk district, village Sadovy, st. Vekhova, 1, 422537, Russia, Frolova L.A. ,   Institute of archaeology and ethnography of the Russian Academy of Sciences, Acad. Lavrentiev Avenue 17, Novosibirsk, 630090, Russia
Published: September 2024

Studies of the diatom assembly in a 130-cm sediment core from Lake Raifskoye reveal 79 taxa of diatoms ranking below the genus of two classes (centric - 14, pennate - 65). 14C, 210Pb and 137Cs dating results show that the sediment core covers a continuous deposition since 1200 cal. yr BP. During the development of the lake, three periods were identified. In the range of 600-1200 years ago unfavourable conditions for the development of diatoms were noted, presumably due to low environmental temperatures. Period from 150-450 years ago reflects good conditions for the development of diatoms and, as a consequence, an increase in the productivity of algal communities in the lake against the backdrop of rising air temperatures. In the third, modern period, the processes of increasing the productivity of algal communities continue, which can also be associated with an increase in air temperature.
Assessment of Holocene climate influence on hydrothermal regime of paleoecotopes within Ryams of the Baraba forest-steppe (southern Western Siberia)
Authors: Preis Yu.I. ,   Institute of Monitoring of Climatic and Ecological Systems SB RAS, Akademichesky ave., 10/3, Tomsk, 634055, Russia, Maltsev A.E. ,   V.S. Sobolev Institute of Geology and Mineralogy SB RAS, Akademika Koptyuga ave., 3, Novosibirsk, 630090, Russia, Leonova G.A. ,   V.S. Sobolev Institute of Geology and Mineralogy SB RAS, Akademika Koptyuga ave., 3, Novosibirsk, 630090, Russia
Published: September 2024

A clearly defined trend of alterations in the properties of peat across the depth of the deposit has been observed in the two studied ryams of the Barabinsk forest-steppe. The changes in peat properties influenced by external factors outweigh those induced by autogenic development of the bog. In order to achieve an accurate reconstruction of changes in the water regimes of ryams, it is essential to consider that the properties of peats reflect not only the state of the water regime at the time of their deposition but also subsequent changes over time. Both peat sections exhibit a catastrophic transition from the eutrophic to the oligotrophic stage of development approximately 4100 and 1100 years ago.
Coastal lakes of Southern Far East: climatic impact and natural hazards records
Authors: Razjigaevа N.G. ,   Pacific Geographical Institute FEB RAS, Radio St. 7, Vladivostok, 690041, Russia, Ganzey L.A. ,   Pacific Geographical Institute FEB RAS, Radio St. 7, Vladivostok, 690041, Russia, Grebennikova T.A. ,   Pacific Geographical Institute FEB RAS, Radio St. 7, Vladivostok, 690041, Russia, Mokhova L.M. ,   Pacific Geographical Institute FEB RAS, Radio St. 7, Vladivostok, 690041, Russia, Makarova T.R. ,   Pacific Geographical Institute FEB RAS, Radio St. 7, Vladivostok, 690041, Russia
Published: September 2024

The study of sediments of coastal lakes and palaeo-lakes in the southern Far East allowed us to identify several short-term paleoclimatic events in the transition “continent-ocean” zone. In the southern Kurils, palaeo-lakes that existed since the Late Glacial were found. Most of the lagoonal lakes were formed when sea level stabilized or declined slightly during the Holocene transgression. The most detailed data on hydroclimatic changes were obtained for the Middle-Late Holocene. The intensity of the summer monsoon and cyclogenesis activity associated with ocean and atmospheric anomalies in the Asia-Pacific region played a major role in the lake evolution. Sea water input to reservoirs occurred during extreme storms and tsunamis.