bluuebunny/crossref_metadata_2025 huggingface dataset:
Methodological fundamentals for obtaining high quality food grain and increasing the yield of winter wheat in crop rotations of Central Chernozem Region
Authors: Dudkina T A , Dolgopolova N V
Published: January 2022

The increase in the production and application of organic and mineral fertilizers, the cultivation of crops using intensive technology require the balance of the elements of productivity at the highest level. One of the leading places among them is occupied by plant nutrition. The intensive technology is characterized not only by a high level of fertilization, but also by the exact adherence to the rates, timing and methods of application. The ultimate goal of the intensive technology is not only to increase yields and improve the quality of winter wheat grain, but also to maintain or increase soil fertility. It was found that fertilizers improved the quality of wheat grain in all years of the study. Fractional application of nitrogen led to an increase in the content of protein and gluten in the grain in all the studied links of crop rotations. In increasing the yield of agricultural crops and the quality of grain, the development of scientifically substantiated crop rotations with correct alternation of crops in them in relation to specific soil and climatic conditions is by no means unimportant. Crop rotations also influence the elements of soil fertility. Changes in the structure of sown areas should be carried out taking into account the need to increase the area under high-yielding crops, both grain and row crops.
Determination of grain product safety by high-performance liquid chromatography
Authors: Yu Gumerov T , Gabdukaeva L Z , Nurgalieva A R , Abrosimov I A
Published: January 2022

The paper evaluates the safety of cereal stock developed as a supplement to the food ration of persons working in especially harmful labor conditions in accordance with the order of the Ministry of Health and Social Development of the Russian Federation No. 46n of February 16, 2009 (Annex 2). The performed sanitary and chemical studies revealed that the composition of considered products does not contain biological contaminants – mycotoxins. Such substances are natural contaminants of grains, cereals, legumes, vegetables and fruits and represent low molecular secondary metabolites produced by microscopic mold fungi.
Agrotechnological peculiarities of crop combination in Beta vulgaris subsp. vulgaris cultivation in vertical hydroponics
Authors: Kling A P , Kumpan V N , Pashek V A , Prokhorova N A
Published: January 2022

The dispensing of vertical cultivation technology in greenhouses in Russia has been held back due to deficiency of a specific assortment of vegetable plants. The studies with the possible species of cultivated crops for vertical hydroponics were carried out in Omsk State Agrarian University. The growth of Beta vulgaris subsp. vulgaris is attractive for getting “baby green”. The study of the technological peculiarities of Beta vulgaris production and the compilation of a scientifically grounded crop rotation in a container-type greenhouse with vertical cultivation of crops is the goal of research work. For growing green crops in vertical container-type greenhouses, including Beta vulgaris cutting, the sowing of seeds can be in the seedling department, bypassing the germination chamber. Beta vulgaris seedling period is 7 days, then within 3–4 months the “Baby greens” leafs are cut, the required parameters are reached by the plants in three weeks, namely leaves are cut about 4–6 times from each container, after that a turnover is performed. The proposed rational system of using the area promote increasing the amount of cut green from 0.25 to 2.0–2.86 kg from the production section. Agrotechnological measures for the use of crop rotation in the cultivation of Beta vulgaris in vertical hydroponics allow starting an autonomous mobile complex with maximum efficiency.
Assessment of soybean productivity factors under conditions of the southern part of the non-black earth zone of Russia
Authors: Lukyanova V , Konkina V S , Vavilova N V , Evsenkina Y M
Published: January 2022

In modern conditions, the demand for soybeans is increasing both in the world and in the Russian Federation. Analysis of the trends characterizing the production of this crop has showed the prevalence of extensive factors - the growth of sown areas in all federal districts. Soybean yield is also growing, but its absolute size is significantly lower than the world average. In addition, the productivity of soybeans significantly depends on the hydrometeorological conditions of cultivation. Since most of the territory of the Russian Federation belongs to the zone of risky farming, plant support means are required. The article provides an overview of the influence of growth stimulants X-Site, G and Stimulate, G on soybean yield in Ryazan region. The results have showed that in order to obtain high and stable yields of this agricultural crop, it is necessary to feed soybeans in budding and flowering phases with plant growth regulator Stimulate, F with a consumption rate of 0.5 l/ha. This will increase the yield of the crop by 2.5 dt/ha and increase the protein content to 40.8 %.
Biodistortiometry as a new method for determining the properties of agricultural products
Authors: Korzhuk M S , Akulinin V A , Zabolotnykh M V , Korzhuk V M
Published: January 2022

The development of new methods for the study of agricultural products is an actual task. A large number of studies on the electrical properties of biological objects are performed today for scientific and industrial purposes. Distortions of electric signals are considered conventionally as harmful. The authors performed test-bench analysis of harmonic distortion, produced by different agricultural products. Apple, banana, tomato, tangerine were tested. The digital source of sinusoidal signals and a computed spectrum analyzer were main components of the test-bench circuit. Results of measurements of harmonics, from first to tenth, were presented in a graphic form. Each kind of agricultural products created harmonic distortion with an authentic set and a level of harmonics. So, the authors have shown the ability of analyzing harmonic distortions to determine properties of agricultural products.
The evaluation of structural-mechanical properties of the functional fermented milk product
Authors: Kurenkova L A , Burmagina T Y , Matushev A S
Published: January 2022

In the conditions of high competition on the market of food products producers have to carry out a search for new kinds of raw materials in order to diversify the assortment of produced products. Adding raw materials and ingredients of different origin of the composition of dairy products irrevocably leads to the change of quality parameters. One of such parameters is consistence. To control the consistence, it is necessary to check it orgonaleptically and study the structural-mechanical properties of the product under development. In the work, consistence of the samples of a newly developed fundamental fermented dairy product with wheat brans was studied by an organoleptic method and a method of rotational viscometry. The necessity of the conducted studies is conditioned by the fact that using only organoleptic method for the evaluation of the consistence is not always objective as it depends on the skills and qualifications of a specialist who carries out a study. The appliance of the method of rotational viscometry allows describing a model of body flow mathematically, defining effective viscosity and other characteristics. Rheological characteristic were identified with the help of the rotation viscometer Rheotest. The samples of a fermented dairy product with wheat brans were the objects of the study. Their amount in the product was from 0 to 10 %. As the result of the conducted organoleptic and rheological studies of consistence of the samples of the functional fermented dairy product with wheat brans, it was concluded that the new product, depending from mass fraction of wheat brans in the composition, could be referred to a drinkable or eaten by a spoon types. It was found out that according to the flow character the functional fermented dairy product could be referred to pseudoplastic bodies.
Effect of subcryoscopic storage temperature on shelf life of chilled broiler meat
Authors: Makoveev I I , Kozak S S
Published: January 2022

Limited shelf life of chilled poultry meat hinders its transportation over long distances to remote areas of consumption. In this regard, it is necessary to develop a storage technology for chilled poultry meat with prolonged shelf life. The study was carried out on meat samples of broiler chickens produced in accordance with GOST 31962-2013 and cooled by water evaporation. An IS 203.4 temperature recorder was used to measure meat temperature, and a TESTO 205 device was used to measure pH. The microbiological, physicochemical, and sensory characteristics of meat were determined according to standard methods. The shelf life of chilled meat was determined in accordance with MUK 4.2.1847-04 Sanitary and epidemiological assessment of justification for the shelf life and storage conditions of food products. The study showed that meat stored at −2.0 ± 1.0 °C remains fresh for 20 days in terms of microbiological, physicochemical and organoleptic characteristics. It was found that meat can be transferred from a supercooled state to a chilled one in order to increase the shelf life to 15 days at a storage temperature of -2.0 ± 1.0 °C.
Strength analysis of a cutting kinked curve plate with clamped free edges of a chisel type deep tiller
Authors: Mikhaylin A , Bandurin M A , Akhmet’yanov I R
Published: January 2022

Currently existing chisel type deep tillers have a number of disadvantages. The authors propose a research of the strength of a deformer system element of an experimental chisel type deep tiller in the form of kinked plates with clamped-free edges. The present paper analyses the possibility of lengthening of the horizontal elements of the deep tiller shank deformer system without loss of their strength and significant change in their thickness. A mathematical model of a thin elastic homogeneous isotropic plate with clamped-free edges was used. A modified model of the kinked plate is proposed, which has not been investigated earlier. The presented problem is solved numerically. Calculation is performed in the first approximation for the stress-strain state of two isotropic fixed kinked plates with clamped medial edges, symmetrically fixed on a vertical shank, set obliquely to the vertical axis, having equal stiffness and constant cross-section along the entire length (volume objective). It is found that the reduction of the actual plate thickness by more than 1/3 of the design thickness is the most dangerous case. This result leads to failure of a separate fragment of the kinked plate. The proposed thickness of 2 mm does not immediately result in failure of a separate fragment of the part. The plate of the investigated form, made of C255 grade steel, will not provide sufficient strength of the part and its fixing on the deep tiller’s shank. The paper proves the possibility of using kinked plates of the given shape having a variable thickness profile.
Two-aspiration air-sieve grain cleaning machines of new generation
Authors: Orobinsky V I , Baskakov I V , Chernyshov A V , Gulevsky V A , Gievsky A M
Published: January 2022

The paper provides a review of fractional technologies developed by the authors, allowing to divide the grain heap coming from combines into 3 fractions: seed, fodder and unused waste. They are based on the use of two-aspiration air-sieve grain cleaning machines. The authors have developed a line of grain cleaners OZF-50/25/10 and OZF-80/40/20. Their productivity in terms of preliminary cleaning is 50 and 80 t/h, primary cleaning productivity is 25 and 40 t/h and secondary cleaning productivity is 10 and 20 t/h, respectively. The machines use an improved two-aspiration system with the ability to independently adjust the speed of air flows in the channels (patent No. 2298441), a new design of a sieve mill with a two-tier arrangement of sieves and setting in each tier sequentially two (at OZF-50/25/10) and three (on OZF-80/40/20) sieves. The mills implement a new sieve arrangement scheme (RF patent No. 43798), as well as original devices for a ball sieve cleaner and a pneumatic separation channel for the second aspiration. These devices make it possible to obtain the required quality of sieve cleaning and to isolate biologically defective grain in the pneumatic separation channel of the second aspiration. The separator for secondary cleaning of seeds SVS-30 is designed for the preparation of seeds of grain, spike, leguminous, industrial and oil crops when implementing fractional technology during post-harvest processing. Like all machines for secondary cleaning of seeds, the pneumatic system of the separator has two pneumatic separation channels for pre-screening and post-screen cleaning. A distinctive feature of the pneumatic system of the SV-30 separator is the consistent use of the same air flow in both aspirations. Fractional technology for processing grain heaps, implemented on an air-sieve separator, will increase the cleaning performance by 1.5…1.8 times with a minimum amount of mechanical stress on the seeds.
Rotary paddle orienting device for planting root crops
Authors: Ovtov V A , Chirkova N S
Published: January 2022

In the total volume of vegetable production, sugar beet takes a leading position. However, the current structure of sugar beet seed production in Russia is not able to meet the needs of agricultural producers with domestic seeds, which leads to a high share of the use of foreign breeding hybrids. Therefore, studies aimed at reducing the cost of manual labor when planting sugar beet mother plants through the development and use of orienting devices for planting machines are relevant. The article presents a three-dimensional model of a rotary paddle orienting device with given design parameters for planting sugar beet mother plants. The power expended on the drive of the rotary paddle orienting device providing the piece-by-piece supply of sugar beet plantings at a planting unit speed of 3.6 km/h has been determined. The kinematic parameters of the operation with the rotary paddle orienting device in conjunction with the landing apparatus of the planting machine have been substantiated. The energy calculation of the drive of the rotary vane orienting device was carried out and the loads acting on it were carried out, as well as the rolling bearings were selected. A chain transmission has been designed and modeled using the KOMPAS 3D computer-aided design system and its main parameters have been determined, which ensure reliable operation of the rotary paddle orienting device.
Assessment of agricultural techniques of grape cultivation in arid conditions of southern Russia based on analysis of variance
Authors: Polukhina E V , Vlasenko M V
Published: January 2022

The aim of the research was to assess the effectiveness of agricultural techniques for growing table grapes in the arid conditions of southern Russia. The research is relevant, since the improvement of agricultural techniques for growing grapes improves its growth and development, marketability of products, and increases plant resistance to diseases. The experiments were carried out in a vineyard located on the light chestnut soils of the Astrakhan region. The number of grape bushes is 1250.0 pieces/hectare. Water-soluble fertilizers were tested separately and in combination on plantings of table grape varieties of early, middle and late ripening. The concentration of aqueous solutions of fertilizers was 0.3 % for Plantafol and 0.1 % for Boroplus. The high efficiency of foliar dressings is achieved when they are carried out in certain phases of the plant’s growing season. The background was a mineral fertilizer - Ca(H2PO4) 2 × H2O at the end of each growing season (60.0 kg a. s./he), as well as N16P16K16 (64.0 kg a. s./he) before bud break and before flowering. A strong dependence of the efficiency of growing grapes on the interaction of varietal samples and applied fertilizers has been established. At the same time, additional products were obtained according to the options for applying fertilizers for different varieties in the range of 2.5-6.1 t/hectare.
Increasing the efficiency of the extruder in producing sunflower cake
Authors: Priporov I E
Published: January 2022

The purpose of the research is to reduce the specific energy consumption of extruders in the protein feed preparation, namely a sunflower cake, and at the same time to increase productivity without product quality deterioration. The research objective is to develop a mathematical model that describes the performance of the improved extruder. As a result of the experimental and theoretical studies using experiment design methods, a mathematical model of the sunflower cake obtainment process was designed, it describes the performance of the improved extruder. The analysis of two-dimensional sections of the combination of X1 - X2 factors shows the nature of the response surface of an ellipsoid shape, X1 - X3, X2 - X3 are of a paraboloid, and the centers of the experiment are located in the investigated area, which allow determining rational parameters for combinations of these factors. As a result of a multifactorial experiment, the optimal values of the factors were determined: the mixture temperature at the exit from the extrusion auger of the matrix is 133.67 °C, the extrusion auger winding pitch is 7.58 mm, the area of the discharge hole of the matrix die is 323.89 mm2. With a combination of factor optimal values, it is possible to obtain high-quality sunflower cake with the highest extruder capacity, which is 0.87 t/h.
Technical support by automated control system for ecological-technological processes of crop growing in conditions of protected ground
Authors: Pryahin V N , Karapetyan M A , Ilinich V V
Published: January 2022

The article is dedicated to the study of methods and means of automated system control of ecological and technological processes of plants in protected ground conditions. The key concepts and main directions of the study include: development and substantiation of a conceptual scheme for managing crop cultivation technologies and application of information technologies that take into account the ecological and technological state of the crop production facility. Automated control systems were compared in terms of deterministic and stochastic modes with respect to quality indicators of greenhouse microclimate parameters. The main factors have been characterized for the growth and development of plants in protected ground conditions. A comparative analysis of fully and partially automated systems that control the microclimate in greenhouses has been made. A block scheme was proposed for the control over the technological process, taking into account the automation of plant growing and the results of forecasting the conditions of emergencies. The technical means have been offered for automated control of technological processes of crop production, which allow obtaining the added effect. The ways of improving the automated control system with the help of technical means were outlined for increasing the qualitative and quantitative characteristics of the crop in the greenhouse, taking into account the economic efficiency of the planned activities.
Theoretical description of the motion of a material particle in pan vibrating batchers for agricultural purposes
Authors: Sabiev U K , Soyunov A S , Myalo V V , Yatsunov A N
Published: January 2022

One of the main tasks of which is to ensure sustainable feed production using highly efficient resource-saving machines and technologies. It is known that it is recommended to feed agricultural animals and poultry in the form of feed mixtures, balanced in composition. Feed grain can be processed into compound feed, developing its compound feed production in places of direct consumption. In the technology of compound feed preparation, one of the most important links is the dosing process, subject to special requirements for the accuracy of the input of components to obtain a homogeneous feed mixture. It is recognized to consider the use of vibration technologies and machines as promising in the field of dosing, allowing to achieve significant results in improving quality indicators. The paper proposes a theoretical description of the motion of a material particle through vibrating batchers, which can be both single-component and multicomponent. A differential equation for the relative motion of a particle along an inclined plane performing longitudinal nonharmonic oscillations is obtained. The article presents theoretical trajectories of changes in the displacement, velocity, and acceleration of a particle for one period of oscillation of the tray by a vibrating batcher at various values of the generalized coefficient K, obtained on a computer from the results of numerical solutions.
Development of formulation for soft cheese based on milk from animals of different species
Authors: Shuvarikov A S , Pastukh O N , Zhukova E V , Korenevskaya P A
Published: January 2022

One of the core branches of the Russian farming industry is the dairy industry. Cheese has always ranked first in nutritional profile and calorie count. It is high in fat, protein, minerals and vitamins. All these components are in balanced proportions and are easily absorbed by the human body. In Russia, the most consumed is cow cheese; goat cheese is also gaining popularity; in the Caucasus – goat and sheep milk cheese. Cheese made from milk of different agricultural animals each has its own quality indicators. Hence, the paper provides data on using various types of milk – cow, goat, sheep and mixtures – to produce cheese. The paper describes the objects and methods of research, the results of research experience, benchmarking and evaluation of finished cheese, physical and chemical properties and sensory characteristics. The highest content of fat, SNF and protein was found to be present in goat milk. In cheese production, bryndza cheese made from sheep milk was distinguished by a large yield, cheese from a mixture of goat and sheep milk – by the highest fat content, and sheep cheese – by protein. Taste tests concluded that consumers preferred goat cheese. Cow and sheep cheese ranked low. The maximum number of points was given to bryndza cheese made from a mixture of goat and sheep milk.
Analysis of the results of control of toxic elements in food
Authors: Skryabina O V , Yurk N A , Ryabkova D S , Diner Y A
Published: January 2022

The article discusses the experimental substantiation of the use of the stripping voltammetry method in order to organize and control the process of measuring toxic elements in food products, the quantitative criteria of which are direct indicators of safety. Comparative results are given □□ the example of dairy and milk-containing products and criteria for the amount of toxic elements in products and their norms, in particular. The analysis of the monitoring points related to the work logs for the control of these elements was carried out, the processes of the quantitative chemical analysis of the collected samples were studied. The sample data was tracked by the specified method of IV measurements on a «TA-1» voltammetric analyzer. Also, the analysis of regulatory and various technical documentation for the level of pollution by toxic elements of our environment was carried out and the possibilities of ways of excretion and their entry into products were considered. Intralaboratory control instruments were used in the form of control charts; according to the results of the construction of which, the results of correctness and accuracy were determined and interpreted. Managing these safety processes is one of the stable analysis of evaluating the internal control of the parameters of results and obtaining close-reliable conclusions. As a result of the research, indicators of the correctness and accuracy of the data were derived.
Need for supporting laboratory for testing agricultural and forestry tractors
Authors: Solovyev R , Cheranev S , Gerasimov M , Kolomeichenko A , Zotov P , Sovin K
Published: January 2022

The paper describes the relevance of the creation of a supporting laboratory for testing compliance with the Organisation for Economic Co-operation and Development (OECD) Tractor Code for agricultural and forestry tractors in conditions of international integration. The paper provides the international requirements for tractor products according to the OECD Tractor Code regulations. A set of activities for the creation of a supporting laboratory is presented. The study lists which methodologies need to be developed for testing tractor units and assemblies. It shows the procedure for validating tests at the OECD. It is pointed out that the development and use of digital services is necessary to ensure a leap forward in the development of integration in the field of technical regulation.
Formation of a model of a closed production cycle in an agricultural enterprise based on the use of biological waste
Authors: Vinogradova V S , Sorokin A N , Borodiy S A
Published: January 2022

An ecologically safe agroecosystem can be thought of as a model of a closed cycle of matter and energy. Increasing the adaptive potential of the production system is achieved by creating flexible production facilities, improving infrastructure, as well as researching and preparing new types of raw materials, energy and technologies for inclusion in the production cycle. The use of an ecological-economic model, in the form of a computer program, will allow, using dynamic mathematical functions, combined into a structure according to the feedback principle, to process a large amount of information about the current state of production sectors, predicted climatic parameters, dynamics of market prices, etc. The result is a tactical modernization of production to ensure maximum sustainable profitability and environmental safety. The introduction of vermicompost into the soil, at a dose of 8-12 t/ha, provides a return of carbon to the agroecosystem (280-330 kg), which compensates for the losses of the humus mineralization process (285 kg) during the cultivation of grain crops, for example, spring barley, with a planned grain yield of 2.0 t/ha. The field of application of the model can be peasant and farm enterprises, state agricultural enterprises, regional departments of agriculture with the possibility of regulating the social and agricultural policy of the region.
Rheological properties of composite mixtures from wheat and amaranth flour
Authors: Derkanosova N M , Stakhurlova A A , Vukic M , Vujadinovic D
Published: January 2022

The lack of essential nutrients in the population’s diet contributes to the expansion of the range of traditional products through the production of fortified products. Enrichment is often carried out by adjusting the traditional recipe by introducing unconventional raw materials, characterized by an increased content of deficient substances, primarily protein, alimentary fiber, minerals and vitamins. Changes in the properties of the dough lead to a change in the characteristics of the finished bakery. The influence of different dosages of unconventional raw materials (in the article - flour from extrudate amaranth grain, from 10 to 20 %) on the rheological properties of the dough was investigated using Brabender instruments.
Assessing the applicability of Fusion Landsat-MODIS data for mapping agricultural land use - A case study in An Giang Province
Authors: Diem P K , Diem N K , Can N T , Minh V Q , Huong H T T , Diep N T H , Tao P C
Published: January 2022

This study aimed to evaluate the applicability of using time-series data of spatiotemporal fusion Landsat-MODIS imagery for mapping agricultural land use in An Giang province, Vietnam. The Spatial and Temporal Adaptive Reflectance Fusion Model (STARFM) was adopted for fusion techniques to integrate the relatively high spatial resolution of Landsat (30 meters) and frequently revisit time of MODIS (MOD09Q1, 8-days). The Maximum Likelihood Classifier (MLC) was then used to classify the land cover categories based on variations of NDVI (Normalized Difference Vegetation Index) time-series over the observation period. The overall accuracy is about 84.9%, and a kappa coefficient of K=0.7, which revealed the effectiveness of using Fusion Landsat-MODIS NDVI data in land cover classification at the provincial scale. The current of the agricultural land use was finally mapped, including seven categories, namely built-up areas (10.49%), double rice crops (4.8%), triple rice crops (68.24%), perennial tree/orchards (4.08%), annual crops (7%), water surfaces (3.07%), and forest (2.32%). The results indicate that the agricultural land use cover can be detected in detail using Fusion Landsat-MODIS imagery. The classification is dramatically higher compared to the map classified by a conventional method of solely Landsat 8 image analysis (overall accuracy of 67.3% and Kappa coefficient K=0.35). The research outcomes will support the detailed information for managers in evaluating the impact of climate change on the rice cropping system toward sustainable agriculture development.
Impacts of Livelihood Activities on the Environment and Natural Resources of Can Gio Mangrove Forest, Ho Chi Minh City
Authors: Son Lam Vinh , Phong Nguyen Vu , Kien Ta Trung , Phu’o’ng Chau Nguyen Thi , Hoa Le Thanh , Phu Vo Le
Published: January 2022

In recent years, local livelihood activities in the Can Gio district have increased significantly, including aquaculture practices, aquaculture cultivation, salt-works, forest guard, farming, livestock, tourism, and etc. These livelihood activities have contributed remarkably to the local economy and the improvement of living conditions for local people. However, the burgeoning development of these activities have posed negative impacts on the mangrove ecosystem in Can Gio. In which, the use and exploitation of existing human and natural resources are paid inadequate attention. The purpose of this study is to identify livelihoods by conducting a survey with 536 questionnaire samples in both the buffer and transition zones in Can Gio Mangrove Forest. In addition, the quality of surface water sources was examined by collecting 70 surface water and wastewater samples. The results show that the quality of surface water meets the allowable limits of QCVN 08-MT:2015/BTNMT. The extent of the impact from livelihood activities on the environment of mangrove forest is at the medium level. However, the livelihood of aquaculture cultivation practices has the most affect on the environment and natural resources and is posing negative impacts on the quality of water sources in Can Gio Mangrove Forest. Therefore, these findings will be useful information for decision makers of the local authority in building an appropriate planning for aquaculture cultivation area. Further, irrigation and drainage systems for aquaculture practices need to be invested to control and handle wastes from aquaculture cultivation areas.
Impact of weather factors on hospital admission of hand, foot and mouth disease under climate change scenarios in Ho Chi Minh City.
Authors: Nhat Phung Duc , Phu Vo Le , Văn Chính Đặng , Minh Tam Duong Thi , Thanh Mai Tien
Published: January 2022

Hand, foot, and mouth disease (HFMD) is one of the most common communicable diseases in Vietnam. The present study aims to examine the association between weather factors and HFMD in association with hospitalisation. Daily and weekly weather and HFMD data from 2013 to 2018 in Ho Chi Minh City were deployed. Poisson regression model combined with a distributed lag non-linear model (DLNM) was applied to examine the relationship between weather factors and HFMD. The forecasting model for HFMD was performed by using the Global Climate Model (GCM) and Yasushi Honda model. The result showed that the average daily temperature induces an increase in the risk of HFDM hospitalisation was 26°C- 30.1°C. The average daily humidity also caused increasing the risk of hospitalisation of HFMD was 75% - 85%. However, the average daily humidity <60% reduced the risk of getting HFMD. The study provides quantitative evidence that the incidence of HFMD cases was associated with meteorological variables including average daily temperature and daily humidity in Ho Chi Minh City. This findings implies that there is a need for building a public health policy for eliminating and mitigating climate change impact on community health in a resilient approach.
The association between high temperature and hospitalisations for cardiovascular diseases under climate change scenarios in Ho Chi Minh City
Authors: Duc Nhat Phung , Minh Tam Duong Thi , Chinh Dang Van , Phu Vo Le , Dang Tran Ngoc , Thanh Mai Tien
Published: January 2022

Global warming is anticipated to induce an increase in the frequency and intensity of hot days and heatwaves, which ultimately have effects on public health. The study aimed to identify the impacts of high temperature and developing climate forecasting projections focused on cardiovascular causes in Ho Chi Minh city (HCMC). The projections were built up based on updated climate scenarios in HCMC. Poisson regression model combined with a distributed lag non-linear model (DLNM) was applied. The forecasting model for cardiovascular causes was performed by using the Global Climate Model (GCM) and Yasushi Honda model. Result showed that the average daily temperature induces an increase in the risk of hospitalisation, in which temperature below 25.7°C reduced number of patients due to cardiovascular disease, meanwhile temperature above 25.7°C has increased hospitalisations. Heat waves over 31°C had the strongest impact on the > 60 years old elderly people after 5 days lag and decreased its impact consecutively to age groups of 41 to 60, 16 to 40, and less than 15 years old. The incremental prediction for the hospitalised cardiovascular disease cases based on the RCP4.5 scenario was 79,713 cases and based on the RCP8.5 scenario was 81,362 cases, respectively.
Adaptation to saline intrusion for agriculture farming transformation in the coastal Ben Tre province, Vietnam
Authors: Hong Diep Nguyen Thi , Trung Phan Ky , Cam Nhung Dinh Thi , Thanh Huong Nguyen Thi , Vu Pham Thanh , Tuan Le Anh
Published: January 2022

This study aimed to evaluate the adaptive capacity (AC) of agriculture farming transformation to improve for the adaptability by saline intrusion of those culture systems in the coastal Ben Tre province. The primary data was collected by questionnaires in three coastal districts of Ba Tri, Thanh Phu and Binh Dai with 178 households to distribute on agriculture land use transformations. An Object-Based Image Analysis (OBIA) and multi-temporal image analysis approach was developed to detect how LULC changes during 2010-2020 in the coastal Ben Tre province using Landsat TM and OLI data. The MODIS (MOD09 8-day reflectance) data was processed into monthly NDVI maps with the Time Series Product Tool software package and then used to classify regionally common rice crops LULC types using unsupervised classification by ISODATA algorithm. Based on primary data collection, evaluating adaptation measures was assessed the compilation of modification options based on a detailed description and criteria including human, society, infrastructure and natural conditions by standardized a weight ranges of adaptive indicators in the agriculture land use changes. The results detected five agriculture land use transformation including rice-shrimp crop rotation to aquaculture, single rice crop to aquaculture, double rice crop to perennial plant/orchards, double rice crop to rice-shrimp crop rotation, and triple rice crop to double rice crop. The adaptability of these transformations conducted the shrimp-rice crop rotation to aquaculture in Binh Dai of strongly high adaptability. Next is followed by double rice crops to orchards and double rice crops to rice-shrimp crop rotation with high adaptability while the rice-shrimp crop rotation to aquaculture is only moderate in Thanh Phu. The low adaptability levels were identified on single rice crop to aquaculture and triple rice crop to double rice crop transformations due to tolerant condition of saltwater for rice crop cultivation. The studies results can further contribute to support adaptation planning in these sectors by using, developing and streamlining this framework to additional and different socio-ecological contexts.
Proposed Strategy for the Development of a Local Geopark at Mui Ne Red Sand Dunes, Phan Thiet, Vietnam - based on Tourist Perceptions and Experience from Taiwan
Authors: van Onselen V M , Lin T-Y , Vo L P , Nguyen Lam T H
Published: January 2022

Vietnam attracts many tourists owing to its unique and diverse geological landscapes. The Vietnam tourism development strategy until 2030 sets a target to make tourism a more sustainable economic sector, in which the advantages of natural resources and development of a variety of tourism products are promoted. Binh Thuan province in central-south Vietnam, hosts many high potential geosites including Mui Ne Red Dunes. Although this is a popular tourist destination, there is no clear tourism strategy for this site and local communities now regulate tourism in an unsustainable way. Online comments from review databases (TripAdvisor and Google reviews) are analysed to find themes in tourism perceptions after a visit to the Red Sand Dunes. Main themes are found that negatively affect tourist perceptions, such as the extended pollution of the dunes, theft reports and disturbance by jeeps, ATV’s and motorbikes. Many tourists recommend that this site should be better managed. To conserve this area in the future, the development of an all-inclusive local geopark is suggested, based on the tourism perceptions and previous studies assessing this landscape. This strategy is adapted from the UNESCO geopark framework and an example of a recently established local sand dune geopark in Taiwan is discussed. Implementing a local geopark, following the steps described in this study, can be beneficial for sustainable development and local communities in this area, while also promoting environmental education and enhancing disaster risk reduction.
Zoning groundwater potential recharge using remote sensing and GIS technique in the Red river delta plain
Authors: Nhan Pham Quy , Hung Le Viet , Le Tran Thanh , Le Khoa Thi Van , Nhan Dang Duc , Cuong Tran Quoc
Published: January 2022

The Red River delta plain is the second largest delta in Vietnam and is located in the North of the country with an area of 14,860 km2 and residing more than 22.5 million inhabitants. Groundwater is mainly exploited in Quaternary sedimentary aquifers with a total discharge of about 3 million m3/day. Some localities have shown signs of over-exploitation such as in Hanoi and in Nam Dinh, which may lead to related problems such as depletion, subsidence, saltwater intrusion, and water pollution. In order to be able to sustainably exploit groundwater, the groundwater potential recharge needs to be estimated. There have been many studies using different methods to estimate the groundwater recharge and to zone potential recharge. In the study area, there are several studies for groundwater recharge, but some are still uncertain because of using indirect methods, some are locally estimated in specific areas. Therefore, the objective of this study is to apply remote sensing and GIS to zone the groundwater potential recharge and its verification by using radioactive isotope 3H analysis in the Red River delta plain. Various types of satellite images have been used and interpreted to detect the different thematic layers which concern the groundwater potential recharge. GIS has been applied as a platform for analysis and integration of thematic layers for zonation, finally. Field trip and water sampling for chemical and radioactive 3H analysis were also conducted. Zones with low, moderate, and high groundwater potential recharge have been delineated with good agreement from the direct estimation of groundwater recharge by radioactive isotopes 3H.
Catalytic oxidation of formaldehyde over silver supported on ZSM-5: The role of Ag and mesopores
Authors: Luon Nguyen Tan , Quang Tu Le Nguyen , Long Nguyen Quang
Published: January 2022

Silver nanoparticles (AgNPs) are increasingly drawing a great deal of attention because of their exclusive properties and a huge variety of applications. In recent years, using AgNPs supported on various carriers as heterogeneous catalysts has become promising for treating some toxic gases in the environment, such as HCHO. This study has successfully synthesized AgNPs onto ZSM-5 microporous zeolite and ZSM-5 mesopore-modified zeolite (Meso-ZSM-5) by ion-exchange method using sodium borohydride as a reducing agent. The resulting catalysts were then characterized by N2adsorption-desorption method. In order to evaluate HCHO adsorption, desorption, and the surface reaction of these catalysts, temperature-programmed desorption (TPD) and temperature-programmed surface reaction (TPSR) were employed. The TPD and TPSR experiments were conducted with different relative humidity. The results showed that Ag/Meso-ZSM-5 exhibited higher catalyst activity in HCHO complete oxidation than Ag/ZSM-5 at high temperatures because of a new larger pore system within the zeolite. Furthermore, TPD and TPSR experiments provided an explanation for the poor performance of the catalysts at low temperatures, which was associated with the high adsorption capacity of the zeolite.
A Study of Carbon Storage in Beijing’s Parkland Based on Biomass Method--Take Changyang Park as an Example
Authors: Tian Rui , An Yonggang
Published: January 2022

Greenhouse gas emissions are particularly severe in cities. Urban plant carbon sinks are currently one of the main means of indirectly achieving carbon neutrality. Based on the perspective of urban park green space, this paper analyzes the structure and types of trees and shrubs in Changyang Park, Fangshan District, Beijing, and then calculates their carbon storage capacity by biomass method, and analyzes the tree species with strong and economic carbon sink capacity to provide some practical data and theoretical reference for the construction of suburban parks of the same type in Beijing, and to provide a scientific basis for the selection of landscape carbon sequestration in urban green space. It also provides a scientific basis for the selection and community configuration of the tree species in urban green areas, which can reduce the CO2 concentration in the atmosphere, alleviate the urban heat island effect and improve the ecological environment.
Research on the Planning of Mountain Type Lodging in Forest Recreation Industry Based on ArcGis Technology--The Example of Forest Recreation Base in Gaoping City Praying Mountain Resort
Authors: Tian Rui , An Yonggang
Published: January 2022

The advent of the post-industrial era has caused a specific degree of damage to both the habitat and the natural environment. Forest recreation has become an emerging mode of health tourism for people in China. B&B is an important part of forest recreation planning. In this paper, we use ArcGis software to quantify the elevation and slope of the forest recreation base in Gaoping City, Shanxi Province, and provide some data and support for the construction of mountain-type B&B in forest recreation base.
Research on the Site Selection of Recreation and Sports Industry Development Based on GIS Analysis--Henghe Town as an Example
Authors: Li Yuegui , Zhang Lisheng
Published: January 2022

In the context of population aging and “sub-health” phenomenon, people’s demand for health and recreation, leisure and sports environment is getting stronger and stronger. This paper takes Henghe Town, Yangcheng County, Jincheng City, Shanxi Province, as an example, and uses RS and ArcGIS in geographic information technology to analyze the data elevation, slope and slope direction, to analyze the chart of Henghe Town’s recreation and sports industry development environment, so as to carry out product planning and environmental site planning under the recreation and sports industry. The aim is to create a national brand of forest recreation and sports and to promote industrial linkage. And it provides reference and reference for other forest recreation and sports industry development based on GIS environment site selection.
Exploring the Distribution of Forest Recreation Resources in Sichuan Province Based on GIS Spatial Statistics
Authors: Li Yuegui , An Yonggang , Li Miaomiao , He Zuoyu
Published: January 2022

Sichuan Province has excellent basic conditions for forest recreation. Sichuan Province is divided into six regions, namely, Chengdu Plain, Qinba Mountain, Panxi, Southeast Sichuan, West Sichuan and East Sichuan. According to the existing data and the needs of forest recreation evaluation in Sichuan Province, the aggregation index, superiority index and scale index are selected to calculate the regional development potential and are used as evaluation indices for evaluation. GIS and spatial statistics are used to analyze the distribution and pattern of recreation resources in Sichuan Province, and to provide reference and support for the future planning direction and strategic layout of forest recreation in Sichuan Province.
Study on tribology of liquid-solid formed CuPb20Sn5/Carbon steel bimetal
Authors: Zhang Guowei , Kang Yuanyuan , Liu Yijun , Wang Zhaojie , Xu Hong
Published: January 2022

Taking CuPb20Sn5 as the research object, the CuPb20Sn5/Carbon steel bimetallic sample was prepared by the solid-liquid compound method, and the relationship between the microstructure and friction properties of the bimetallic CuPb20Sn5 layer. The results show that the Cu3P and δ (Cu31Sn8) phases in CuPb20Sn5 are distributed in the α-Cu to improve the wear resistance of the alloy. The friction coefficient fluctuates in the range of 0.057 ∼ 0.093, when the load was 150 N-350 N. When the speed exceeds 3.86 m s−1, as the load increases, the friction coefficient first increases and then decreases, and the wear rate increases. When the load was less than 250 N, the wear surface of CuPb20Sn5 was smooth, and the material was basically free of wear. When the load was 300 N, the friction coefficient reaches the lowest point, and the third body friction layer was formed in CuPb20Sn5 layer, and the wear mechanism was slight adhesive wear. When the load was greater than 300 N, Pb will fall off the CuPb20Sn5 surface, and the friction coefficient increase, causing abrasive wear.
Solar cell parameter accuracy improvement, via refinement of the Co-Content function. Part 2: Discussion on the experimental application
Authors: Rangel-Kuoppa Victor Tapio
Published: January 2022

In this Part 2 of this series of articles, a discussion of the literature reported obtention of the solar cell parameters (the shunt resistance (R

sh
), the series resistance (R

s
), the ideality factor (n), the light current (I

lig
), and the saturation current (I

sat
)), via the use of the Co-content function

CC

V
,
I

=

∫

0

V

I
−

I

sc

dV

(where

I

sc

=
I
(
V
=
0
)

) is given. The results reported in Part 1, namely, the accuracy dependence of the determination of R

sh
, R

s
, n, I

lig
, and I

sat
, as a function of the number of measured points per voltage (

P

V

) and percentage noise (

p

n

) is used to analyse the reported solar cell parameters. In one case, the application of

CC

V
,
I

to solar panels is discussed, revealing that it can also be used in the case of solar panels, and not only for laboratory-made solar cells, in voltage ranges larger than [0 V, 1 V]. In another case, the application of

CC

V
,
I

to IV curves showing the roll-over effect is discussed. It is found that the roll-over effect has a pernicious effect in the solar parameter extraction, and then the

CC

V
,
I

should be calculated before the roll-over effect takes place. In a third case, the importance of the correct determination of

I

sc

on the correct calculation of

CC

V
,
I

is discussed.