Spring Period Research Articles

Time series models for the description and forecasting of incident cases of dengue: a case study in Londrina- Paraná

Objective: The objective of this study is to describe the temporal behavior of dengue cases and to model the temporal evolution of reported incident cases for the Londrina city, Paraná-Brazil using time series modeling, specifically Seasonal Autoregressive Integrated Moving Average (SARIMA) models from January 2015 to February 2023, with the aim of predicting new cases. Methods: This is an ecological epidemiological study with a time series component. Data were obtained monthly by InfoDengue site in a structured way for the Londrina city- Paraná between January 2015 and February 2023. Time series analysis was used and the SARIMA (Seasonal Autoregressive Integrated Moving Average) model was chosen, since these models incorporate a seasonal component, to fit the natural situation of the disease with recursive periodic peaks and drops over the series, considering thus the intrinsic seasonality of dengue in spring and summer periods with an increase in cases. Results: After several inductive adjustments, the SARIMA model (2,1,2)(1,1,1)12 provided the best fit for dengue incidence data, with good performance, including capturing the oscillation peaks of the year 2020 (period of the coronavirus pandemic). Conclusion: The main contribution of the work is a better understanding of the disease, allowing predictions of the number of cases in periods subsequent to the series studied, which brings support for decision-making in public policies for prevention and educational actions for the population, and possibility of managing the SUS priority health system.

The effect of the drug "Epin-extra" on increasing the resistance of Fragaria х ananassa Duch. varieties to spring frosts

Relevance. A crucial condition for maintaining the vital potential of plants is their ability to with-stand adverse environmental conditions. The aim of the work was to study the effect of the drug "Epin-extra" on strengthening the resistance of Fragaria х ananassa Duch. plants for spring frosts.Methods. The objects: strawberry garden Queen and Harvest CGL. With the onset of active growth in the spring period non-root treatments of strawberry plants with were carried out with a solution of the Epin-extra growth regulator containing 24-epibrassinolide. During budding phase, the plants were exposed to negative temperatures in a controlled environment chamber (-3oC) "Espec" PSL-2KPH (Japan). The functioning of the antioxidant defense system and the activity of lipid peroxidation processes in membranes lipids (POL) based on the accumulation of malondialdehyde (MDA) were carried out in the leaves of strawberry varieties.Results. It was shown that the non-root treatment of strawberry varieties with the Epin-extra preparation contributed to a decrease in the processes of peroxidation of cell membranes. The content of malondialdehyde (MDA) was 10,2% lower by the Tsaritsa variety, and the variety the Urozhainaya CGL by 30,1% compared to the control. The amount of the amino acid proline in the Tsaritsa variety was 13,6 % higher compained to the control, and in the Urozhainaya CGL variety by 12,4%. Treatment with Epin-extra contributed to an increase in the amount of sugars in the leaf tissue of both varieties.

Influence of changes in anthropogenic and natural sources on global aerosol optical depth during COVID-19 lockdown: Ground-based observations, satellites, models

We analyze, in this study, for the first time, multi-source data - high-quality ground-based observations (Aerosol Robotic Network (AERONET)) and satellite (Moderate Resolution Imaging Spectroradiometer (MODIS) and Ozone Monitoring Instrument (OMI)) data in combination with two high resolution model (Modern-Era Retrospective Analysis for Research and Applications-2 (MERRA-2) and Copernicus Atmosphere Monitoring Service (CAMS)) outputs, and examine the changes in aerosol optical depth (AOD) across the globe during Corona Virus Disease-2019 (COVID-19) lockdown (2020) period. Statistical significance of the change in aerosol characteristics (AOD and species AODs) from normal (2017–2019 mean) to COVID (2020) period is calculated by two-tailed Student's t-test. AERONET AODs decreased by 20–40% during peak lockdown period in spring and summer of 2020 in most locations across the globe, and these changes are statistically significant. The observed magnitude of changes (increase/decrease) are consistent between AERONET and MODIS. Both global models (MERRA-2 and CAMS) capture well, observed AOD changes. OMI absorbing aerosol index captures increases in carbonaceous aerosols due to wildfires and dust. Global analysis reveals that changes in total AOD and species AODs are highest, and statistically significant during spring over Middle East, South and East Asia. Among all regions, change in dust AOD is maximum over South Asia during spring (>75%; −0.04 decrease in dust AOD in −0.05 change in total AOD) which is statistically significant. Black carbon (BC) and sea salt contribute ≤10% to AOD across the globe. Decrease in BC AOD is maximum over South Asia (50%) during spring 2020 providing a direct evidence for the impact of applied restrictions on anthropogenic activities. Decrease in AOD over North America, Europe, Russia, Middle East, South Asia, East Asia, and South East Asia led to global decrease in AOD. This quantitative documentation of changes in AODs due to reduction in aerosol components/species, their regional and seasonal variations are crucial in planning and supporting future mitigation efforts.

Bean Sprout Process in Mongolian Jewelry

Inner Mongolia in northern China is a multi-landform and multi-ethnic area with great regional characteristics, where various ethnic groups live here. Existing archaeological data show that as early as 5,000 years ago, the Yangshao culture of Inner Mongolia. Before the Spring and Autumn Period and the Warring States Period, some nomadic people such as Xiongnu and Donghu lived a nomadic life here. The cultural treasures with a long history, such as Hongshan Culture, Liao Shangjing Site and Yuan Shangdu Site, are all models of traditional design. The essence of its design is that it properly expresses the innovative style of filament technology. Inner Mongolia belongs to the inland from the geographical location, in the case of less abundant materials, the craftsmen through ingenious design, for the road of regeneration. The birth and inheritance of these ornaments cannot be separated from the diligence and wisdom of the craftsmen. In Mongolian, "black black" is often used to describe excellent craftsmen. This paper will be divided into two paragraphs: material and process, structure and form, to analyze the design characteristics of bean sprout process, so as to further explore the aesthetic characteristics contained in its design consciousness. From the process production as the entry point, comb the internal connection between bean sprout process, cloisonne and diancui process. In order to carry forward the excellent design concept of the Chinese nation, it hopes to inspire the current students' learning, inheritance and innovative research in teaching practice.

Highly Pathogenic H5N1 Influenza A Virus (IAV) in Blue-Winged Teal in the Mississippi Flyway Is Following the Historic Seasonal Pattern of Low-Pathogenicity IAV in Ducks.

Highly pathogenic H5N1 (HP H5N1) influenza A virus (IAV) has been detected annually in North American ducks since its introduction during 2021, but it is unknown if this virus will follow the same seasonal and geographic patterns that have been observed with low-pathogenicity (LP) IAV in this reservoir. We monitored blue-winged teal in the Mississippi flyway prior to the detection of HP H5N1 and during two post-introduction migration cycles from spring 2022 to spring 2024, testing birds for infection and antibodies to IAV nucleoprotein (NP), hemagglutinin subtype H5, and neuraminidase subtype N1. Antigens representing clade 2.3.4.4b HP H5 and LP North American H5 were used for hemagglutination inhibition (HI) and virus neutralization (VN) tests for H5 antibodies. Virologic results were consistent with historic seasonal and geographic patterns reported for LP IAV with peak infections occurring in pre-migration staging areas in Minnesota during fall 2022. However, the high prevalence of the H5 subtype was exceptional compared to historic prevalence estimates at this same site and for the Mississippi flyway. HP H5N1 was detected on wintering areas in Louisiana and Texas during the fall of that same year and this was followed by an increase in estimated antibody prevalence to NP, H5, and N1 with no HP H5N1 detections during the wintering or spring migration periods of 2022/2023. HP H5N1 was not detected in Minnesota during fall 2023 but was detected from a single bird in Louisiana. However, a similar increase in antibody prevalence was observed during the winter and spring period of 2023 and 2024. Over the two migration cycles, there was a temporal shift in observed prevalence and relative titers against the H5 antigens with a higher proportion of ducks testing positive to the 2.3.4.4b H5 antigen and higher relative titer to that antigen compared to the representative LP North American H5 antigen. The seasonal and geographic patterns observed appear to be driven by population immunity during the migration cycle. Results support an initial high infection rate of HP H5N1 in blue-winged teal in the Mississippi flyway followed by a high prevalence of antibodies to NP, H5, and N1. Although prevalence was much reduced in the second migration cycle following introduction, it is not known if this pattern will persist in the longer term or affect historic patterns of subtype diversity in this reservoir.

Study the Dynamics of the Transformation Processes for Nitrogen and Phosphorus Compounds in the Ecosystem of the Vistula Lagoon of the Baltic Sea using the Methods of Mathematical Modeling

By using mathematical modeling methods, a systematic study of the interaction of hydrobiological, hydrochemical, hydrological and hydrophysical processes that occur in the ecosystem of the Vistula Lagoon (VL) of the Baltic Sea was carried out, taking into account the processes in the active layer of bottom sediments (BS). The features of the dynamics of nitrogen and phosphorus compounds, the turnover time and the components of the balance of compounds of biogenic elements in the VL ecosystem, as well as the degree of their temporal variability have been analyzed. It is shown that the variability of nitrogen and phosphorus compounds in the aquatic environment increases in spring and autumn periods. This is due to an increase in river flow into the lagoon and an increase in the level of external biogenic load on the water area of the VL. Model calculations of matter fluxes allow us to state that the inputs of dissolved organic and suspended matter into the lagoon from external sources and the removal to the Baltic Sea are important processes that significantly affect their content in the VL ecosystem. It has been established that under strong winds the process of sedimentation of suspensions can be largely blocked, and the intensity of BS resuspension can increase significantly. An analysis of the main qualitative and quantitative features of the nature of the temporal dynamics of the DON and DOP turnover times, as well as the mineral compounds of nitrogen and phosphorus, indicates a close conjugation of the processes of transformation of dissolved organic and inorganic substances in the water of the VL. A quantitative assessment of the processes of consumption and excretion of compounds of biogenic elements by different groups of aquatic organisms has been performed, and the important role of heterotrophic bacterioplankton and protozoa in the processes of transformation of compounds of nutrients in the VL ecosystem has been shown. The model can be used to perform scenario modeling and analysis of possible changes in the VL ecosystem under changing climatic and anthropogenic conditions.

Intra‐ and inter‐specific variability in the temporal trends of butterfly phenology in the Northern Alps

Abstract Large‐scale declines in insect abundances and richness due to climate and land‐use change have been well documented during the past years. These changes are accompanied by shifts in insect phenology towards earlier appearance in spring and prolonged activity periods in late summer and autumn. The magnitude of these responses to climate change might be masked by intra‐ and inter‐specific variability in phenology and trait expression. Here, we used a large data set of museum records of butterflies from the northern Austrian Alps (380 m to >3000 m asl) and ask to which degree does intra‐ and inter‐specific variability in spring and autumn activity and in the numbers of generations affect the temporal trends in phenology during the last 30 years? For the 17 most abundant species, we found phenological variability to strongly differ among species, local habitats and study years. Ubiquitous mobile species were significantly more variable than habitat specialist and sedentary species. Intra‐specific variability was highest in ubiquitous habitat generalist species and increased during the study period. As consequence, seasonal appearance and composition of local butterfly communities are now less predictable than decades ago. It remains unclear whether this trend causes a rewiring of pollinator food webs.

Ecology and phenology of the bat tick Argas (Carios) dewae (Acari: Argasidae).

Although 12 soft tick species (Argasidae) are native to Australia, the ecology of most is poorly known. Argas dewae parasitizes several insectivorous bat species and has been recorded on humans. Therefore, understanding its ecology is crucial for wildlife health management and public health preparedness. To address this knowledge gap, A. dewae populations were monitored from 2 bat hosts (Chalinolobus gouldii and Austronomus australis) using bat boxes at 3 sites in Victoria, Australia, for 28 months (July 2005–December 2007). A phenological profile undertaken for A. dewae revealed that tick load on bat hosts increased throughout winter and peaked in the first month of spring, before collapsing and remaining low throughout the drier late spring and summer periods. There was also further investigation of the relationship between 2 response variables (tick infestation risk and tick load) and a range of explanatory variables (body condition index, sex, age class, bioseason, site, bat density per nest box). In C. gouldii, site was the only significant predictor of A. dewae infestation risk, while load was correlated with several variables including age class, sex, bioseason, roost density and body condition index. This paper also reports the first records of A. dewae from 6 bat species in 3 bat families (Miniopteridae: Miniopterus australis; Molossidae: A. australis; Vespertilionidae: Chalinolobus morio, Myotis Macropus, Vespadelus darlingtonia, Vespadelus regulus) and a second record of A. dewae from a human. The first distribution records are presented for A. dewae in South Australia, the Australian Capital Territory and Queensland.

Varying Performance of Low-Cost Sensors During Seasonal Smog Events in Moravian-Silesian Region

Air pollution monitoring in industrial regions like Moravia-Silesia faces challenges due to complex environmental conditions. Low-cost sensors offer a promising, cost-effective alternative for supplementing data from regulatory-grade air quality monitoring stations. This study evaluates the accuracy and reliability of a prototype node containing low-cost sensors for carbon monoxide (CO) and particulate matter (PM), specifically tailored for the local conditions of the Moravian-Silesian Region during winter and spring periods. An analysis of the reference data observed during the winter evaluation period showed a strong positive correlation between PM, CO, and NO2 concentrations, attributable to common pollution sources under low ambient temperature conditions and increased local heating activity. The Sensirion SPS30 sensor exhibited high linearity during the winter period but showed a systematic positive bias in PM10 readings during Polish smog episodes, likely due to fine particles from domestic heating. Conversely, during Saharan dust storm episodes, the sensor showed a negative bias, underestimating PM10 levels due to the prevalence of coarse particles. Calibration adjustments, based on the PM1/PM10 ratio derived from Alphasense OPC-N3 data, were initially explored to reduce these biases. For the first time, this study quantifies the influence of particle size distribution on the SPS30 sensor’s response during smog episodes of varying origin, under the given local and seasonal conditions. In addition to sensor evaluation, we analyzed the potential use of data from the Copernicus Atmospheric Monitoring Service (CAMS) as an alternative to increasing sensor complexity. Our findings suggest that, with appropriate calibration, selected low-cost sensors can provide reliable data for monitoring air pollution episodes in the Moravian-Silesian Region and may also be used for future adjustments of CAMS model predictions.

Characterizing Chromophoric Dissolved Organic Matter Spatio-Temporal Variability in North Andean Patagonian Lakes Using Remote Sensing Information and Environmental Analysis

Chromophoric dissolved organic matter (CDOM) is crucial in aquatic ecosystems, influencing light penetration and biogeochemical processes. This study investigates the CDOM variability in seven oligotrophic lakes of North Andean Patagonia using Landsat 8 imagery. An empirical band ratio model was calibrated and validated for the estimation of CDOM concentrations in surface lake water as the absorption coefficient at 440 nm (acdom440, m−1). Of the five atmospheric corrections evaluated, the QUAC (Quick Atmospheric Correction) method demonstrated the highest accuracy for the remote estimation of CDOM. The application of separate models for deep and shallow lakes yielded superior results compared to a combined model, with R2 values of 0.76 and 0.82 and mean absolute percentage errors (MAPEs) of 14% and 22% for deep and shallow lakes, respectively. The spatio-temporal variability of CDOM was characterized over a five-year period using satellite-derived acdom440 values. CDOM concentrations varied widely, with very low values in deep lakes and moderate values in shallow lakes. Additionally, significant seasonal fluctuations were evident. Lower CDOM concentrations were observed during the summer to early autumn period, while higher concentrations were observed in the winter to spring period. A gradient boosting regression tree analysis revealed that inter-lake differences were primarily influenced by the lake perimeter to lake area ratio, mean lake depth, and watershed area to lake volume ratio. However, seasonal CDOM variation was largely influenced by Lake Nahuel Huapi water storage (a proxy for water level variability at a regional scale), followed by precipitation, air temperature, and wind. This research presents a robust method for estimating low to moderate CDOM concentrations, improving environmental monitoring of North Andean Patagonian Lake ecosystems. The results deepen the understanding of CDOM dynamics in low-impact lakes and its main environmental drivers, enhance the ability to estimate lacustrine carbon stocks on a regional scale, and help to predict the effects of climate change on this important variable.

The influence of climatic factors on the effect of growth regulators in agrocenoses of spring barley

Relevance. In recent years, under the conditions of climate change, there has been a tendency to reduce the acreage of spring barley, reduce the quantity and quality of grain. From the point of view of ensuring the stability of gross grain harvests and ecology, it is necessary to manage the agrocenosis.Methods. The experiments were conducted in 2021–2024 agricultural years in the conditions of the Azov sea zone of the Rostov region. Objects of research: Leon spring barley variety and growth regulators “Artafit” (0.3 l/ha), “Biodux” (3 ml/ha), “Obereg” (60 ml/ha), “Trainer” (3 l/ha), “Fulvohumate” (0.4 l/ha).Results. The climatic conditions in 2024 were extreme in terms of low rainfall and high amounts of spring temperatures. The year 2023 was the most favorable from this point of view. The yield level correlates with the level of moisture in the spring period, the highest indicators were observed in 2023, and the lowest in 2024. In the current market conditions and annual price increases, unit production costs are increasing. Thus, in 2024, the cultivation of spring barley turned out to be unprofitable. Moreover, the use of biological products did not allow us to gain a plus. In 2022 and 2023, the use of the drug “Trainer” turned out to be unprofitable due to the high cost of the drug. “Biodux” and “Obereg” showed the highest profitability.

Mycolichenological portrait of alder forest: alpha diversity revealed in 1ha plot in the Samursky National Park (Republic of Dagestan, Russia)

Aim. Xylobiont fungi and lichens determine the sustainability of forest ecosystems, but their species richness and taxonomic diversity depend on the forest type and the degree of its disturbance. Alder forests, characterised by a specific set of ecological conditions, represent poorly studied habitats in terms of myco‐ and lichenobiota. The aim of this work was to determine the species composition of aphyllophoroid fungi and epiphytic lichens on a 1 ha sample plot in a lowland floodplain forest dominated by Alnus glutinosa in the Delta Samura area of the Samursky National Park.The authors collected basidiomata of lignicolous fungi and lichen specimens on a sample plot of 1 ha during field studies. The surveyed forest area is represented by a community dominated by Alnus glutinosa and lianas. The material was identified using light microscopy techniques and a standard set of chemical reactions.Thirty‐three species of aphyllophoroid fungi (Basidiomycota) and 53 species of lichens and allied fungi (Ascomycota) were identified. Among them, 16 species (48 %) of aphyllophoroid fungi were recorded for the first time for the Samursky National Park, including six species revealed for the first time for the Republic of Dagestan, of which three species (Donkia pulcherrima, Phanerochaete cumulodentata and Sertulicium granuliferum) were new to the Northern Caucasus. Lichen species Arthothelium ruanum, Bacidia arceutina and Graphis pulverulenta are listed for the first time for the Republic of Dagestan. At the same time, 21 species of lichenized fungi were recorded for the first time on Alnus glutinosa within the region.The taxonomical structure of aphyllophoroid fungi revealed reflects the spring period of basidiomata‐based field study. The predominance of corticioid fungi and revealing hydnoid species among morphological groups may be indicative of the generally wetter habitats of alder forests in comparison to other forest types distributed in the studied area. Most of species were recorded on dead wood of Alnus glutinosa as the main forest‐forming tree. At the same time, each of other substrates (Carpinus betulus and Corylus avellana) turned out to be the habitat of species new to the region. The group of fungal species developing on large‐scale substrate units, represented by fallen trunks, was the most prevalent and is to be considered as more vulnarable in a case of anthropogenical habitat disturbance. The majority of epiphytic lichens discovered on alder are not specific to this woody substrate, except for single findings. These species belong to epiphytes inhabiting the Samur forest, the core of the lichenobiota of which is composed of thermophilous lichens of lowland deciduous forests. In our opinion, the relict character of the forest, which is an isolated and rather small forest massif with relatively homogeneous climatic conditions, causes a high similarity between the species composition of lichens revealed in the surveyed sample plot with Alnus glutinosa and previously studied plots dominated by Carpinus betulus, Populus alba, and Quercus robur.

Seasonal dynamics of indicators of mineral metabolism in horses in the conditions of the Leningrad region

The article analyzes the seasonal dynamics of mineral metabolism indicators in adult horses kept in private stables in the Leningrad region. As a result of the research, knowledge of the concentration and dependence of indicators on the seasonality of the year was obtained. It is important to remember that macro- and microelements are not synthesized in the body, they come from food, water, and air. The degree of their assimilation depends on the state of the respiratory and digestive organs. The most difficult period for animals is winter, when there is a decrease in the resistance of the body as a whole due to poor climatic conditions and minimizing physical activity in the fresh air. All these are predisposing factors for the imbalance of indicators at the level of the whole organism.It is established that in the autumn-winter period there is a decrease in indicators relative to the average annual digital values. Thus, there is a linear relationship between the concentration of calcium and phosphorus in blood serum – the minimum values are observed in winter and are 2.53±0.27 mmol/l and 1.76± 0.11 mmol/l, respectively. And the maximum values are typical for the autumn period and are 3.63±0.29 mmol/l for calcium and 2.33±0.12 mmol/l for phosphorus. Similar dynamics is observed in other indicators of the body's mineral metabolism. Thus, for trace elements such as copper, iron, protein-bound iodine, the minimum values were noted in the spring period. This can be explained by a decrease in the mineral components of the feed itself, as a result of long-term storage, resulting in changes in the chemical composition of vegetable feed with fat oxidation. Microelementoses and osteodystrophic processes are observed in animals. The autumn period is characterized by the highest concentrations of minerals in the blood serum of horses, on average by 8-12% compared with the average annual figures, This is explained by the fact that it was in the summer period that the greatest benefit was obtained from juicy plant substances of feed and proper exercise.This knowledge is necessary to understand the processes occurring in the body of horses at different times of the year and the possibility of correcting mineral supplements based on the data obtained

НЕКОТОРЫЕ МОМЕНТЫ СОВЕРШЕНСТВОВАНИЯ ПРОГНОЗИРОВАНИЯ ОБЪЕМА ПОЛОВОДЬЯ В УСЛОВИЯХ ОГРАНИЧЕННЫХ ГИДРОМЕТЕОРОЛОГИЧЕСКИХ ДАННЫХ

The article deals with methods of improving the forecasting of the volume of spring flood runoff. The main objects of the study are the Oba, Ulbi and Dresvyanka rivers, which are lateral tributaries of the Shulba reservoir. These rivers belong to the type of rivers with spring-summer flooding and extended flow for more than 2...3 months. The aim of the study is to develop a methodology for flow forecasting based on the relationship between snow accumulation and river flow in spring and summer periods. The results of the study of hydrological and meteorological factors affecting runoff formation are presented, and equations for forecasting runoff during spring and summer floods and its duration are derived. The obtained multiple regression equations demonstrated high accuracy in modelling flood volumes, with correlation coefficients between observed and predicted data ranging from 0,79 to 0,91. According to S/σ calculations, the results obtained indicate good reproducibility of the observed flood volumes, with values ranging from 0,46 to 0,53.

Thermal performance of solar dryer using bio-composite insulation material based on date palm waste for drying of hot chili: experimental investigation in Algerian Sahara

This paper investigates the thermal efficiency of solar dryers using different insulation materials, focusing on a bio-composite derived from discarded date palm residues. The current study introduces this sustainable material, created from local palm waste, as insulation material in Solar Air Heaters (SAHs) for agricultural products drying purposes. Thus, two SAH models are designed, fabricated and compared for their thermal efficiencies: the first one used the bio-composite (Model A) as insulation material and the second one is equipped with a polystyrene sheet in the rear insulation (Model B). The thermal performance of these models are assessed, alongside the drying kinetics of Algerian chili at different maturity stages under the climate of Biskra, Algeria. A local product that we aim to promote (Arab chili), widely used in southern Algeria during the harvest period in summer and early spring. It is generally grown using traditional techniques despite its very delicious taste, while (Gazelle’s horn) chili is grown in greenhouses throughout the year. Although the polystyrene-insulated SAH shows slightly better thermal efficiency, the bio-composite model achieves satisfactory drying temperatures, drying chili in 5 hours and 30 minutes.

Сезонные изменения качества сна студентов как предикторы «адаптационной» инсомнии

Background: Sleep disorders occur even at a young age and may result from environmental factors such as circannual fluctuations in hormonal background and social sleep restriction, leading to the development of insomnia. The aim of the study: To assess the quality of sleep in young people (medical students), living in the city of Vladikavkaz in the spring and autumn seasons of the year for identifying predictors of insomnia. Materials and methods: With the help of the Pittsburgh questionnaire to determine the indices of sleep quality, we conducted a survey of 435 2-3 year medical students of the North Ossetian State Medical Academy (age 20.1±0.08) in seasons with a multidirectional photoperiod trend. In the spring period, 270 students were surveyed, in the autumn – 165. C17 components were assessed from 0 to 3 points, in total they determined the overall sleep quality index (Global Score PSQI, (GS)). We analyzed the sleep time of students, the relationship with latency and sleep duration. Results: The total score (GS) in the spring season was 7.19 (boys – 6.07; girls – 7.51), in autumn – 5.69 (boys – 5.59; girls – 5.75). “Bad sleep” is noted by 66.7% of respondents in spring, and 46.4% in autumn. The main contribution to the proportion of students with poor sleep quality in the spring is made by girls – 71.4%, in autumn, the proportion of students with a good quality of sleep increases, both among girls and boys. In the overall negative assessment of the quality of sleep in the spring, the leading role is played by sleep latency (contribution of 21.5%), in addition, the time of going to bed in 69.7% of medical students shifts to a period after 24:00, provoking a violation of circadian rhythms organism. Conclusion: The overall sleep quality index and the components of the PSQI questionnaire during the survey of medical students have a seasonal dependence. In all the studied seasons, students had a “poor” quality of sleep (more than 5 points), but in autumn, sleep characteristics improved by 21% according to Global Score points. In both seasons, students have 3 groups of symptoms out of 5 main criteria for the diagnosis of insomnia syndrome, which allows us to regard violations of the main components of the sleep index as predictors of the development of adaptive (acute) insomnia.

THE ORIGIN OF CONFUCIUS THOUGHT AND LU CULTURE FROM THE PERSPECTIVE OF ZUO ZHUAN

There are thirty-eight records about Confucius's words and deeds in Zuo Zhuan, from which we can clearly feel the promotion and sublimation of Confucius's thought to Lu's culture. As a native of the state of Lu in the spring and autumn period, Confucius's worship of rite, virtue, and elegant language is the inheritance and promotion of the traditional culture of Lu, while the factors of advocating benevolence and achievement are the sublimation and transcendence of the traditional culture of Lu. At the same time, Confucius's thought is also an important part of Lu culture and even Chinese culture, which has a profound impact on later generations.

On the problem of annual overfishing of the silver bream Blicca bjoerkna (Cyprinidae) in industrial fishing in the Astrakhan region

The silver bream Blicca bjoerkna and the small-sized common bream Abramis brama are characterized by external similarity, which contributes to manipulations with the substitution of one species (common bream) by another (silver bream) when taking into account the volume of industrial fishing in the Astrakhan region. This is due to the fact that in the period of spring fishing season during common bream spawning migration, the share of non-commercial common bream in commercial catches increases (to 20–30 %), the catch of which is limited in accordance with the Fishing Rules. In order not to exceed the allowable volume of by-catch of non-large common bream, fish producers register en masse catches of small-sized bream as a catch of silver bream, which causes significant damage to common bream fish stocks through oversampling of first-time maturing individuals of the population. In recent years, the share of non-commercial common bream recorded as a silver bream in May alone is 13–28% of its official catch during this period. In order to reduce the catch of first spawning common bream producers of non-commercial length on the water bodies of the Astrakhan region in the period from April 21 to May 20, it is recommended to introduce a ban on industrial fishing of silver bream.

Current state of sturgeon fish off the eastern coast of the Sea of Azov

The aim: the characteristics of sturgeon fish that make seasonal migrations to the near-shore zone of the Azov Sea.Material — scientific monitoring of commercial fishing with stationary seines in the water area of the Sea of Azov adjacent to the Primorsko-Akhtarsk district in October 2022, 2023 and April 2023, 2024.The results: Russian Sturgeon and Starry Sturgeon (Sevruga) were encountered in stationary seines from 50% to 100%, and the average catch of these species per facility was 1.3–7 sp./day in the autumn and spring periods, respectively. In the fall of 2022, the prevalence of Sevruga in bycatch was almost double — 63% of the total bycatch; in the spring and fall of 2023, 2024, the superiority was with Sturgeon — 63–83% of the bycatch. Size range of Sturgeon in 2022–2024 was from 22 to 148 cm; Sevruga — from 23 to 123 cm. The weight range of Sturgeon was from 0.1 to 30.0 kg, Sevruga — from 0.2 to 7.8 kg. The share of fish that reached the commercial length was on average 20.7% of Sturgeon and 36.6% of Sevruga. The age of the fish varied from fingerlings to 16+ for Sturgeon and up to 8+ for Sevruga. The average fullness coefficient of Russian Sturgeon in the autumn was 0.72; in spring, — 0.79; Sevruga: in the autumn of 2022 and 2023–0.45, in the spring of 2023–0.58. The state of Russian Sturgeon in the near-shore aggregations indicates the formation of its full-fledged mixed-age population in the Sea of Azov, that allows to expect its commercial fishing in the near future, on the background of the increasing its stock. The state of the Sevruga requires more in-depth research. A high fish fatness coefficient indicates their sufficient food supply.Practical value: Observations of bycatch in stationary seines in the near-shore area of the sea are an important addition to the accounting trawl survey data for understanding the structure of the Russian Sturgeon population in the Azov Sea and practically the main source of information on the state of the Sevruga population.

THERMAL COMFORT ANALYSIS OF WORKERS IN AN INDUSTRIAL FACILITY: A FIELD STUDY IN BOLU PROVINCE

Thermal comfort in industrial facilities has critical importance in terms of worker productivity and health. Providing optimal thermal comfort requires effective use of HVAC systems. In this context, continuous monitoring and improvement are important to ensure appropriate thermal conditions in the working environment. In this study, the current environmental conditions of a facility located in Bolu province were evaluated in terms of workers with the help of measurements and surveys. The measurements were taken separately for summer, winter and spring periods and the evaluations were made by taking into account age, gender, clothing status and activity status. PMV and PPD values were calculated and these values were compared with the survey results and the current thermal comfort conditions were revealed. As a result, it was seen that the clothing status could cause a change between 0.9 ºC and 2.2 ºC in the optimum working temperature.