bluuebunny/crossref_metadata_2025 huggingface dataset:
Broadcasting your variety
Authors: Zähres Frederic
Published: March 2021

This chapter investigates the viability of
YouTube data for the World Englishes research context by introducing
a Namibian YouTuber community and presenting challenges and
opportunities of this mostly uncharted medium. An acoustic phonetic
case study of Namibian English is conducted with a small sample
corpus of YouTube data from 2018, in which vowels relevant to the
Southern African context (e.g. nurse, kit, dress, trap) of
two groups of content creators are analyzed. While researchers face
methodological challenges on YouTube during data collection and
analysis, the results of the acoustic analyses presented show that
the formal and informal speech styles found on YouTube constitute an
accessible and rich type of data that can reaffirm and complement
findings based on traditional approaches.
On the vibrational free energy of hydrated proteins
Authors: Sanejouand Yves-Henri
Published: March 2021

When the hydration shell of a protein is filled with at least 0.6 gram of water per gram of protein, a significant anti-correlation between the vibrational free energy and the potential energy of energy-minimized conformers is observed. This means that low potential energy, well-hydrated, protein conformers tend to be more rigid than high-energy ones. On the other hand, in the case of CASP target 624, when its hydration shell is filled, a significant energy gap is observed between the crystal structure and the best conformers proposed during the prediction experiment, strongly suggesting that including explicit water molecules may help identifying unlikely conformers among good-looking ones.
Operant conditioning reveals task-specific responses of single neurons in a brain–machine interface
Authors: Garcia-Garcia Martha G , Marquez-Chin Cesar , Popovic Milos R
Published: March 2021

Objective. Volitional modulation of single cortical neurons holds great potential for the implementation of brain–machine interfaces (BMIs) because it can induce a rapid acquisition of arbitrary associations between machines and neural activity. It can also be used as a framework to study the limits of single-neuron control in BMIs. Approach. We tested the control of a one-dimensional actuator in two BMI tasks which differed only in the neural contingency that determined when a reward was dispensed. A thresholded activity task, commonly implemented in single-neuron BMI control, consisted of reaching or exceeding a neuron activity level, while the second task consisted of reaching and maintaining a narrow neuron activity level (i.e. windowed activity task). Main findings. Single neurons in layer V of the motor cortex of rats improved performance during both the thresholded activity and windowed activity BMI tasks. However, correct performance during the windowed activity task was accompanied by activation of neighboring neurons, not in direct control of the BMI. In contrast, only neurons in direct control of the BMI were active at the time of reward during the thresholded activity task. Significance. These results suggest that thresholded activity single-neuron BMI implementations are more appropriate compared to windowed activity BMI tasks to capitalize on the adaptability of cortical circuits to acquire novel arbitrary skills.
Two-dimensional easy-plane SU(3) magnet with the transverse field: anisotropy-driven multicriticality
Authors: Nishiyama Yoshihiro
Published: March 2021

The two-dimensional easy-plane SU(3) magnet subjected to the transverse field was investigated with the exact-diagonalization method. So far, as to the XY model (namely, the easy-plane SU(2) magnet), the transverse-field-driven order–disorder phase boundary has been investigated with the exact-diagonalization method, and it was claimed that the end-point singularity (multicriticality) at the XX-symmetric point does not accord with large-N-theory’s prediction. Aiming to reconcile the discrepancy, we extend the internal symmetry to the easy-plane SU(3) with the anisotropy parameter η, which interpolates the isotropic (η = 0) and fully anisotropic (η = 1) cases smoothly. As a preliminary survey, setting η = 1, we analyze the order–disorder phase transition through resorting to the fidelity susceptibility χ
F, which exhibits a pronounced signature for the criticality. Thereby, with η scaled carefully, the χ
F data are cast into the crossover-scaling formula so as to determine the crossover exponent ϕ, which seems to reflect the extension of the internal symmetry group to SU(3).
High level of visual-spatial intelligence’s students in solving PISA geometry problems
Authors: Novitasari Dwi , Nasrullah Ahmad , Wahyu Triutami Tabita , Ayu Apsari Ratih , Silviana Dewi
Published: March 2021

Spatial reasoning and representation are two things that are often used in our daily life, especially in the field of mathematics and geometry. Therefore, this study aims to identify and describe the relationship between representation and spatial reasoning used by students who have high level of visual-spatial intelligence in solving PISA problems. This study is an explorative descriptive study through a qualitative approach. The subjects of this study were 2 third grade junior high school students with high level of visual-spatial intelligence. Data were collected by visual-spatial intelligence tests, mathematical problems related to PISA problems in the form of 3-dimensional dan 2-dimensional geometry problems with two open-ended problems and interviews. The results showed that: (1) there is a relationship between representation and spatial reasoning, (2) students combine their representations and spatial reasoning in giving and proving their answers. The results also showed that students applied their spatial reasoning in the form of spatial visualization and mental rotation. While the most dominant representations used by students are visual representation (76.25%) and symbolic representation (20%).
Mathematical communication ability students based on learning motivation in the COVID-19 pandemic
Authors: Muhammad Malim , Purwanto Joko , Christiyansyah Octarina
Published: March 2021

The research aims to describe Tenth-grade students’ mathematics communication competence of vocational high school of Bina Teknologi, in Purwokerto Indonesia. The research used a qualitative method with Miles and Huberman model consisting of data reduction, data display, and taking a conclusion. The research subjects were Tenth-grade of Network and Computer Engineering class students obtained through purposive sampling. The students were grouped into three categories based on their learning motivation, namely students with high learning motivation, students with medium learning motivation, and students with low learning motivation. Two respondents, from each category, were chosen to be interviewed. The methods of data collection were questionnaires, tests, interviews, and documentation. The used validation test was technique triangulation. The research result shows that Subjects with high learning motivation were able to use language and mathematical symbols in daily events, were able to interpret mathematical ideas based on the graphs presented, were able to provide easy-to-understand arguments, and were able to draw graphs based on mathematical situations or problems. Subjects with learning motivation are able to use language and mathematical symbols in everyday events, are able to provide easy-to-understand arguments, and are able to draw graphs based on situations or math problems. Subjects with low learning motivation are able to use language and mathematical symbols in everyday events and are able to provide easy-to-understand arguments.
Mathematical simulation approach to diagnose performance limiting factor of shot put technique
Authors: Nanang Himawan Kusuma Moh
Published: March 2021

The applied mathematics simulation for human mot ion is one breakthrough of sports biomechanics in sports science. The optimum rate of energy generated in muscle s and knees, hips, shoulders and wrists play a significant role and influence the throw distance. Kinetic analysis of parabolic path is predominantly determined by the speed of release (V0), angle of release (α) and height of at release (h0
) at the delivery phase of throwing. The inequality of anthropometry, physical and quality of technique requires coaches to develop mathematical simulation to diagnose performance. This study describes mathematical simulation of speed (V0), angle (α) and height of release (h0) against a throw distance. The 28 male sport students (19.3±1.2 years, weight of 68.2±5.5 kg, height of 169.7±5.4cm) represent a linear shot put (4kg), recorded with 2 HD cameras in sagittal plane and analysed with kinovea software for kinematic motion. There is significant relationship between speed-(p=0.001), angle-(p=0.003) and height of release (p=0.004) with performance. The rate of speed (7.23±0.75ms-1), angle (44.67± 9.19°) and height of release was (194±7.72cm). The greatest shot performance was 12.57m, applies 7.98±0.02ms of speed, 48.59±2.18° of angle and 199.63±2.21cm of height. Mathematical Simulation can be applied to predict shot put performance through kinematic study.
Game and creative problem solving in mathematics
Authors: Untarti Reni , Ainun Najib Muhammad
Published: March 2021

Although many people perceive that games harm student achievement, it is undeniable that games can have a positive effect on various student abilities, one of which is creative problem-solving in mathematics. The intensity of playing the game of course influences this influence. This study aims to describe creative problem-solving in mathematics in terms of the intensity of playing games. The research method used is descriptive with a qualitative approach. This research was conducted at SMP Negeri 2 Kutasari in the odd semester of the 2019/2020 school year. The research subjects were determined by purposive sampling technique and obtained by class IXA. The instruments used were creative problem-solving in mathematics tests and interview guides. Based on the results of the questionnaire, two students in each category were selected using purposive sampling technique for interviews. Data analysis techniques include: 1) data reduction, 2) data presentation; and 3) conclude. The results showed that students with low-intensity gameplay, either online or offline, are better at the mastery of creative problem-solving in Mathematics than students who play games with high intensity or students who do not play games.
Performance of Massive MIMO systems in cognitive spectrum sensing
Authors: Shamla B , Amrutha T R
Published: March 2021

Cognitive radio is a revolutionary technology that guarantees a viable solution to the spectrum scarcity problem. This prominent new technology has the power to change future technological developments forever if intelligently applied. In Cognitive Radio Networks, secondary (unlicensed) user uses the licensed spectrum band opportunistically, without creating any interference with primary user (licensed) transmission. Spectrum sensing is a vital challenge for spectrum usage and to prevent harmful interference with licensed users. Energy detection has been for a long, constituting the most widely known sensing technique in cognitive radio systems. In this paper, Neyman - Pearson criterion-based detection rules are used to incorporate the local probabilities of detection and false alarm to analyse an energy detector sensing behaviour over additive white Gaussian (AWGN) channel, fading channel and massive multiple input multiple output(MIMO) cases. Closed-form solutions for the probabilities of false alarm and detection were derived. The analytical results were verified by numerical computations using the Monte Carlo method with MATLAB.
A novel Ship detection method from SAR image with reduced false alarm
Authors: Anil Raj J , Idicula Sumam Mary , Paul Binu
Published: March 2021

Many research works using deep learning techniques for automatic ship detection from SAR images have good detection accuracy. But the main problem in these methods is false detection, mostly due to speckle presence. Therefore, we propose a new deep learning model with a novel preprocessing stage to address this problem. We are introducing a deep learning architecture to detect and localize ships in the SAR image. First, generate a three-channel image from gray-scale SAR image. Then, this image is used to train the model to predict the ship’s position in the SAR image. We experimented on the public SAR ship detection dataset (SSDD) and Dataset of Ship Detection for Deep Learning under Complex Backgrounds (SDCD) to validate the proposed method’s feasibility. We used python 3.5 for coding with the Keras framework in the NVIDIA Tesla K80 GPU hardware platform. The experimental results indicated that our proposed method’s ship detection accuracy has increased with reduced false detection percentage.
Analytical study of electromagnetic ion cyclotron wave for ring distribution with AC electric field in Saturn magnetosphere
Authors: Shukla Neeta Kumari , Singh Devi , Pandey R.S.
Published: March 2021

Characteristics of electromagnetic ion cyclotron waves in Saturn inner magnetosphere has been investigated here in close proximity of equatorial plane at approximately mid of the E ring near 5Rs by using data sets released by Voyager and Cassini spacecraft. Previous encounter of these spacecraft with Saturn exposed the strong signature of EMIC wave and harmonics believed to be originated within 7.5 Rs due to dominant O+ions and water group ions. Maxwellian ring distribution for pickup ions contributing ring around planet is opted to find unperturbed particle density. Therefore, investigating here growth of obliquely propagating EMIC wave undergoing wave particle mechanism by opting kinetic approach to establish mathematical dispersion model in view of different parameters and extended to comparative study for parallel propagation. Parametric analysis inferred that waves propagating in the oblique direction grows more as compare to parallel propagating waves for the extended value of temperature anisotropy and the angle of propagation with respect to the ambient magnetic field B (at equator) and second harmonic of ion cyclotron waves indicating that the modified ion cyclotron wave shifts the wave spectra to higher side with increase in bandwidth. Study can be carried out to analyze other instabilities to explore magnetospheric dynamics at different radial distances.
Monitoring versus prediction of the power of three different PV technologies in the coast of Lima-Peru
Authors: Calsi B X , Conde L A , Angulo J R , Montes-Romero J , Guerra J A , de la Casa J , Töfflinger J A
Published: March 2021

This article presents the benefits of two simple analytical models for estimating the outdoor performance of three different photovoltaic technologies in Lima, Peru. The Osterwald and the constant fill factor models are implemented to estimate the maximum power delivered by three photovoltaic module technologies: aluminum back surface field, heterojunction with intrinsic thin-layer and amorphous/microcrystalline thin-film tandem. A 12-months experimental campaign is carried out through measurements of current-voltage curves, irradiance and module temperature. The results show that both models overestimate the modelled power when compared to the measured one. In order to correct the maximum power predicted by both models, a correction factor is introduced. This correction factor allows us to estimate losses and a respective effective nominal power to minimize the prediction error on a monthly and yearly basis. These parameters demonstrate a unique behavior for each technology during different months implying different seasonal impacts of the ambient variables on the module performance. The effectiveness of this correction factor is demonstrated through accuracy measures. It enables the photovoltaic power prediction with an error < 1% for the particular climate in Lima, Peru.
Validation of ultraviolet index data from the Ozone Monitoring Instrument (OMI) based on measurements from meteorological stations in the city of Puno
Authors: Taipe C W , Mendoza E G , Flores H H
Published: March 2021

This research aims to validate ultraviolet index data obtained from the Ozone Monitoring Instrument (OMI) for the city of Puno. Data analysis was conducted on data from the DAVIS Vantage Pro 2 Plus meteorological station located in the city of Puno and data obtained from the OMI for the quadrant -70.540214, -15.982311, -69.540214, -14.982311. The comparison of the UV index data showed a linear correlation of 0.937 and an overestimation of values by the OMI; thus, a data correction equation was formulated for later analysis based on the linear regression of the maximum ultraviolet index values of both datasets at solar noon for the years 2016, 2017 and 2018. The evolution of the UV index shows clear seasonal behavior, both in the ground-based and satellite data, with maximum values obtained in summer and minimum values obtained in winter. The validation results show good correlation between the satellite data and ground-based measurements.
Thermal, structural and mechanical characterization of the whitish Arequipa Airport Ignimbrite
Authors: Espinoza F S , Horn M , Gomez M M , Solis J L
Published: March 2021

The white unit of Arequipa Airport Ignimbrite is a pyroclastic rock that emerges in the deposits of Arequipa and is used as a construction material since colonial times and locally called “sillar” or “ashlar”. The thermal conductivity and thermal diffusivity measured according to ASTM C 177 and Ångström’s method were 0.27 W/mK and 5.67×10−7 m2/s, respectively. The compressive strength and water absorption were 8.92 MPa and 17.2 %. The main crystalline phases of the ignimbrite are plagioclase, cristobalite, sanidine and biotite. The white ignimbrite has good thermal insulation and good mechanical properties.
Concepts for the XIDer readout ASIC incorporating a pipelined ADC with very low dead time
Authors: Schimansky D. , Busca P. , Erdinger F. , Fajardo P. , Fischer P.
Published: March 2021

We present the first concept for the analog front-end of the readout ASIC for the XIDer (X-ray Integrating Detector) detector system which is being
developed by a collaboration between the ESRF and Heidelberg University. The ESRF's Extremely Brilliant
Source (EBS) upgrade which has been completed recently provides X-ray beams of unprecedented
quality, requiring new photon detection instruments. The XIDer project has been launched to develop
a new versatile pixel detector which will be tailored to match requirements imposed by this upgrade. The core challenges
include fast signal acquisition, large dynamic range and single photon sensitivity. A first
prototype ASIC for the analog front-end of a single pixel has been manufactured. It is based on a pipelined two-stage
charge removal circuit which digitizes the incident signal on the fly. We will present
measurement results of the first test chip and concepts for the final system-on-chip implementation
integrating several tens of thousands of pixels.
Separation characteristics of an integrated temperature-controlled micro gas chromatography chip
Authors: Chen J.L. , Han B.Q. , Liu T.H. , Wang H.R. , Wang J.H.
Published: March 2021

Compared with traditional laboratory gas chromatograph, portable gas chromatograph has the advantages of fast detection, low power consumption, lost cost and possible applications out of Lab. In this paper, aiming at replacing the traditional column thermostat, we presented a 4 cm · 4 cm micro gas chromatography (μGC) chip with a thickness of about 1 mm and a column length of 3 m integrating the Pt heating wire and snake-shaped temperature sensor, which greatly reduces the power consumption and volume of the portable gas chromatograph without losing the separation performance of the μGC chip. The integrated μGC chip was fabricated by micro electro mechanical systems (MEMS) process and its temperature was controlled in closed-loop by fuzzy proportion integration differentiation (PID) algorithm. Experimental results indicate the temperature control accuracy under constant temperature can be up to ±0.05 °C. When heating to 180 °C, the power consumption is less than 15 W. The chip has good separation properties when it was used to detect 4 kinds of benzenes, 8 kinds of alcohol mixtures and 10 kinds of alkane mixtures.
Design and sensitivity of the Radio Neutrino Observatory in Greenland (RNO-G)
Authors: Aguilar J.A. , Allison P. , Beatty J.J. , Bernhoff H. , Besson D. , Bingefors N. , Botner O. , Buitink S. , Carter K. , Clark B.A. , Connolly A. , Dasgupta P. , de Kockere S. , de Vries K.D. , Deaconu C. , DuVernois M.A. , Feigl N. , García-Fernández D. , Glaser C. , Hallgren A. , Hallmann S. , Hanson J.C. , Hendricks B. , Hokanson-Fasig B. , Hornhuber C. , Hughes K. , Karle A. , Kelley J.L. , Klein S.R. , Krebs R. , Lahmann R. , Magnuson M. , Meures T. , Meyers Z.S. , Nelles A. , Novikov A. , Oberla E. , Oeyen B. , Pandya H. , Plaisier I. , Pyras L. , Ryckbosch D. , Scholten O. , Seckel D. , Smith D. , Southall D. , Torres J. , Toscano S. , Van Den Broeck D.J. , van Eijndhoven N. , Vieregg A.G. , Welling C. , Wissel S. , Young R. , Zink A.
Published: March 2021

This article presents the design of the Radio Neutrino Observatory Greenland (RNO-G) and discusses its scientific prospects. Using an array of radio sensors, RNO-G seeks to measure neutrinos above 10 PeV by exploiting the Askaryan effect in neutrino-induced cascades in ice. We discuss the experimental considerations that drive the design of RNO-G, present first measurements of the hardware that is to be deployed and discuss the projected sensitivity of the instrument. RNO-G will be the first production-scale radio detector for in-ice neutrino signals.
Conditional attribution of climate change and atmospheric circulation contributing to the record-breaking precipitation and temperature event of summer 2020 in southern China
Authors: Ye Yangbo , Qian Cheng
Published: March 2021

Quantification of the contribution of atmospheric circulation to damaging extreme weather and climate events and the attribution of extreme events in the context of climate change has been gaining worldwide interest. Attribution analysis helps us to better understand the risks associated with the effects of climate change on extreme events. However, the contribution of atmospheric circulation, as well as the influence of climate change, to the record-breaking precipitation event in the middle and lower reaches of the Yangtze River and the concurrent record-breaking hot event in South China during the Meiyu period (June–July) in 2020 are still unclear. In this study, we use flow analogues to estimate how much the atmospheric circulation can explain these two extreme events and the influence of climate change. The results show that the atmospheric circulation explains 70.73% and 43.61% of the extreme precipitation event and the concurrent hot event, respectively. Compared with past climate, the occurrence risk of an event reaching or exceeding the 2020 Meiyu amount under similar atmospheric circulation conditions increased by 5.1 times under the present climate, 80% of which can be attributed to climate change. In addition, hot events similar to the 2020 event cannot occur under past climate, while those reaching or exceeding a one standard deviation threshold increased from 0.58% under past climate conditions to 68.83% under the present climate, 99% of which can be attributed to climate change. These results are beneficial for the understanding and prediction of extreme events in the context of climate change in this region.
Community Motivation to Build Food Security: A Study in Sumberagung Village, Sleman, Yogyakarta
Authors: Lantarsih R , Suryadi  , Sulistiya  , Hariadi U
Published: March 2021

Food security is an essential element of the improvement paradigm and human capacity because food access and rights are very crucial to strengthen important human capacities. This study aims to examine the level of community motivation to build food security and to examine the relationship between levels of motivation and levels of factors that may influence community motivation to build food security. The research location was determined purposively at Sumberagung Village. This study is an explanatory study which uses 100 respondents as a sample. Proportional random sampling was used to select the respondents. Results of descriptive statistic reveal that the motivation in terms of existence, attachment, and growth of society is at a moderate level. Meanwhile, Spearman rank correlation test indicate that institutions, leaders, home gardens have a direct relationship with the level of community motivation, while age and infrastructure have a relationship that is opposite to the level of community motivation in realizing food security. Time, education, and the number of dependents in the family are not related to the level of community motivation in realizing food security.
Visitor Satisfaction of Kampung Flory Agritourism
Authors: Dewandini S K R , Dananto A , Sulistiya  , Subeni
Published: March 2021

Agritourism was developed as a form of environmental conservation and agricultural land resources. Agritourism presents a blend of natural beauty, agricultural production activities, and the culture of agricultural communities that are well managed so that they have an attractive appeal to visitors. The purpose of this study is to examine the level of visitor satisfaction of Kampung Flory agritourism. Besides, the study also attempts to investigate the factors related to visitor satisfaction. One hundred visitors of the agritourism were used as a sample selected by accidental sampling. The level of visitor satisfaction was measured by the Importance Performance Analysis (IPA) index. The Spearman rank analysis is used to determine the factors related to visitor satisfaction. The research location is determined purposively, in the Kampung Flory agritourism. Results from the IPA analysis show that the overall visitor satisfaction index achieved by Kampung Flory Agritourism is 80.24%. The results suggest that Kampung Flory Agritourism is in a position to satisfy consumers. Meanwhile, results from Spearman rank correlation analysis revealed that product quality, service quality, emotional, cost and convenience are correlate with consumer satisfaction. On the other hand, the entrance ticket price does not any correlation with consumer satisfaction.
Properties of rabbit feces composting using indigenous Alcaligenes sp. LS2T and Arthrobacter sp. LM1KK
Authors: Fitriyanto N A , Natalia D , Prasetyo R A , Erwanto Y , Panjono  , Ngadiono N
Published: March 2021

This study aims to determine the effects of indigenous Alcaligenes sp. LS2T and Arthrobacter sp. LM1KK in the composting of rabbit feces. This study consists of 3 treatments (commercial starter as control, Alcaligenes sp. LS2T, and Arthrobacter sp. LM1KK) in triplicate replication. Starter growth profile, emitted ammonia concentration, physical qualities of compost, and the compost’s chemical quality were observed in this study. The data was analyzed using a randomized design (One-way ANOVA). Alcaligenes sp. LS2T has a significant ability to reduce ammonia emission compare to Arthrobacter sp. LM1KK and commercial starter. The best result of the chemical quality of compost was done by Arthrobacter sp. LM1KK with water content observed 28.78%, organic matter was 13.75%, 7.97% of C-organic, P total observed 1.38%, K determined 2.52%. Furthermore, the N value was 0.65%, and C/N Ratio observed 14.97%. As a conclusion, Alcaligenes sp. LS2T and Arthrobacter sp. LM1KK had the potency as same as with commercial starter for composting of rabbit feces. During the composting processes, the Alcaligenes sp. LS2T and Arthrobacter sp. LM1KK had a lower ammonia emission occurs compare to the commercial starter.
Effect of Biofertilizer and Salinity on Growth and Chlorophyll Content of Amaranthus tricolor L
Authors: Siswanti D U , Umah N
Published: March 2021

Amaranth (Amaranthus tricolor L.) is the most popular crop and vegetable in Indonesia. Their growth can decrease due to abiotic stress on agricultural land. Salinity is one of abiotic stress affects the production of cultivated crops and major problem for agricultural land. Application of biofertilizer can increase availability of nutrients and help plant growth in stress conditions. This research was to analyze the growth and chlorophyll content of A. tricolor L. after application of biofertilizer under salinity stress conditions and to determine the optimum dose of biofertilizer needed for optimum growth of A. tricolor L. under salinity stress condition. The biofertilizer dose used was 10 l/ha, 20 l/ha, and 30 l/ha, each combined with NaCl; 2500, 5000, 7500, and 10000 ppm. The parameters measured were plants’ height, number of leaves, and chlorophyll content. The results showed that salinity treatment reduced plant height, number of leaves, and chlorophyll content. Application of 20 l/ha of biofertilizer increased plant height and number of leaves while application of 10 l/ha of biofertilizer increased chlorophyll content. Generally, it was conducted that biofertilizer can be used to increasing plant growth and chlorophyll content of A. tricolor L. under salinity stress condition.
Evaluation of Endophytic Bacteria Isolated from Citrus Plant on Phytohormone Production
Authors: Harwanto  , Yunimar  , Wibisono CM
Published: March 2021

The strategy for improving the productivity of fruit and vegetables in Indonesia can be done through modification of the existing cultivation system by adding certain component of healthy practice farming. One of the approaches for achieving that aim is through the usage of endophytes in cultivation system. The identified mechanisms of endophytic microbes are that the stimulant produced by them is able to suppress diseases and pests that pose a significant threat for plants. Moreover, endophytic microbes are also capable of producing antimicrobial compounds and bio stimulating compounds such as phytohormones and proteins. The purpose of this study was to determine the ability of endophytic bacteria isolates that were taken from collection of Indonesian Citrus and Subtropic Fruits Research Institute in producing IAA hormone, phosphate solvent and nitrogen fixing. The research consisted of several stages; testing for Free Nitrogen Binding Bacteria; Phosphate Solubilizing Bacteria and in Producing IAA. The results showed the three endophytic bacterial isolates isolated from different citrus varieties had the ability to fix free nitrogen. G.28-isolates and G.35_isolates had identical ability to dissolve phosphate, while G.31-isolates could not dissolve phosphate. The most effective time to produce IAA is the fourth day of incubation. G.35-isolates was the bacterial isolate that had the highest IAA production.
Dynamics of macroelements content in blood of foxes (Vulpes vulpes) with different genotypes in postnatal ontogenesis
Authors: Berezina Y A , Domsky I A , Bespyatykh O Yu , Maximov V I , Staroverova I N
Published: March 2021

The dynamics of macronutrients in blood of foxes (Vulpes vulpes L., 1758) of two coloring genotypes: silver-black (A/a b/b; a/a B/B) and Vyatka moth (A/A B/B) in postnatal ontogenesis - at the age of 2, 4, 6 and 12 (adults) months. Macronutrients were determined by the capacity of a semi-automatic biochemical analyzer “BioChem SA” (the USA) using reagent kits from High Technology (the USA). In growing young foxes of coloring genotypes: silver-black (A/a b/b; a/a B/B) and Vyatka moth (A/A B/B), the final profile of the content in the blood of macronutrients Ca2+, Mg2+ and phosphorus is formed by the age of 6 month. Moreover, only in Vyatka moth males (A/A B/B) at the age of 2 months a significant effect of the genotype on the increase in Ca2+ level was noted, in females of the same genotype at the age of 4 months – on the increase in the level of Mg2+. The obtained data can be used as reference values in the study of the etiology and pathogenesis of diseases accompanied by impaired metabolism of macroelements.
Fundamentals of innovative development management of organic food production
Authors: Galkin D G
Published: March 2021

The purpose of the article is to develop theoretical and methodological provisions related to identifying tools for the innovative development of the production of environmentally friendly food. From the standpoint of a systematic approach, the innovative development of organic food production presupposes the presence of a control and controlled subsystem, goals, methods and tools for their achievement. Deduction, logical method, analysis, scientific abstraction, analogy method are applied. It has been substantiated that the tools for the development of the production of environmentally friendly food should combine the efforts of business, science and the state (the “triple helix” model). A technological platform was chosen as a tool at the federal level, due to its focus, goals and resource potential. It is concluded that the presence of distinctive features in the development of organic food production indicates the need to highlight the strategic direction of the same name in the existing technological platform “Technologies of the food and processing industry of the agro-industrial complex - healthy food”.
Local oxidative responses of lacrimal fluid in horses in various types of keratopathies
Authors: Goncharova A V , Sotnikova L F
Published: March 2021

Equine keratopathies are commonly occurring ophthalmic condition affecting the equine industry. In this article, was using clinical material, a correlation was revealed between the occurrence of corneal diseases and increased tear`s antioxidant activity. The occurrence of keratopathies flows with a multidirectional alteration in antioxidants tears, what determines oxidative stress with inflammatory in cornea tissue - result of cell apoptosis and necrosis of the epithelium and endothelium barriers is triggered, the occurrence of corneal defects with marginal vascularization. Research result expands can help understand of pathogenesis keratopathies and can be applied in the future for approaches for prophylaxis and therapy of inflammation corneal diseases.
Modern methods of evaluating the efficiency of agricultural enterprises
Authors: Zinina O V , Olentsova J A
Published: March 2021

Enterprise management, from the point of view of the manager, is expressed in a closed circle of certain interactions, which is aimed at achieving the goals set. Sustainable development of an organization is a functioning in which the influence of external factors allows it to maintain its integrity and autonomy in achieving strategic goals. These factors directly affect the efficiency of the enterprise.
Relationship between milk productivity and live weight of red-and-white cows in JSC “Krasny Mayak”
Authors: Lefler T F , Nagibina A A , Volkova A G , Kurzyukova T A , Sidorenkova I V
Published: March 2021

In the Krasnoyarsk Territory, a genetically young red-motley breed of cattle has become widespread, which requires further improvement of the breed structure, creating diversity, increasing variability for the effective use of breeding and productive qualities. In the breeding factories of the region, specializing in raising this breed, milk yield per cow has been 5.8-6 thousand kg in recent years. However, the period of economic use of cows does not exceed 2.9 lactations. In the conditions of industrial milk production technology, characterized by a high level of mechanization and automation of labor-intensive processes, only animals with strong body composition are able to realize their high genetic potential in terms of productive qualities while maintaining good reproductive abilities and increasing productive longevity. Therefore, studies on the development of a type of cows with body conformation and composition which are most productive and well-adapted to the conditions of breeding are of particular importance and relevance.
Features and problems of lending to agricultural enterprises
Authors: Rozhkova A
Published: March 2021

The agro-industrial complex (AIC) is considered a high-risk area, since the activities of agricultural producers are influenced by natural and climatic conditions, the seasonal nature of revenue from sales of products. Features of the reproduction process in the agro-industrial complex affect the sources of financing the production activities of agricultural enterprises, among which bank loans play a significant role. The article discusses the features of credit risk management of JSC “Russian Agricultural Bank”, reveals the features of Bank lending in this area. Lending plays an important role in the development of agriculture. For agribusiness enterprises, it is the main source of updating production and working capital. Loans are provided for the purpose of improving production assets, increasing capacity, and other aspects. Therefore, risk management is becoming increasingly important and is becoming one of the most important conditions for ensuring the economic security of credit institutions. Implementing targeted and consistent risk management requires significant organizational effort, time, and other resources. An effective risk management system, in particular credit risk, is one of the necessary conditions for the sustainable development of JSC “Russian Agricultural Bank”.
The main technical and economic indicators of the introduction of new test equipment for the determination of toxic elements in food in the laboratory center
Authors: Kholopova Yu S , Ross T , Feshchenko V V , Pavlov R V , Burlankov P S
Published: March 2021

As a result of the analysis of the main technical and economic indicators of the introduction of new test equipment for the determination of toxic elements in food in the laboratory center, it was found that the replacement of the photoelectric concentration colorimeter “KFK-2MP” with the analyzer “Pan-arsenic” when analyzing samples of food products and food raw materials for the content arsenic will be effective. Replacement of the outdated and decommissioned model of the atomic absorption spectrometer “Kvant-AFA” for the atomic absorption spectrometer “Kvant-2AT” in the analysis of samples of food and food raw materials for lead and cadmium content will be effective. The option of replacing the Kvant-AFA spectrometer with a voltammetric analyzer “TA-4” when analyzing samples of food products and food raw materials for lead and cadmium content will be effective if the performance of the new equipment meets the laboratory’s needs in the number of studies, and the purchase of atomic -absorption spectrometer will not be advisable due to the absence of the need for its performance for the implementation of measurements and insufficient solvency of the laboratory. The introduction of the PLP-01M microwave laboratory system introduces a limitation on the number of studies per year, which reduces the capabilities of the measuring device, in cases both for the simultaneously introduced spectrometer “Kvant-2AT” and for the already used “Kvant-AFA”. The introduction of the PLP-01M system will be beneficial if the performance of the new equipment meets the laboratory’s needs in the number of studies.
Analysis and prognostication of consumer preferences at designing working clothes for workers of agricultural clusters of Uzbekistan
Authors: Pulatova Sabokhat , Gaybullaeva Nargiza
Published: March 2021

The article covers the design of rational working clothes for workers of cooling rooms of agricultural clusters. Based on a survey of opinions of consumers, the most preferred types of working clothes, their completeness, color, and the most important indicators of material properties were identified. Because of a survey of opinions of consumers, the requirements for the designed working clothes were formulated.
The effect of freezing currant berries on their chemical composition and the content of heavy metals
Authors: Novikova O A , Smolenkova O V , Asadova M G
Published: March 2021

Blackcurrant is the most attractive source of ascorbic acid compared to other berries and fruits. The seasonality of berry production makes think about ways to preserve them. One of the most environmentally friendly ways is to freeze berries. However, in terms of biochemical value, frozen berries differ from fresh ones. After defrosting, a decrease in the content of ascorbic acid, soluble solids and titratable acids is observed in the berries. Analysis of currant berries during the harvest period for the content of heavy metals makes it possible to evaluate the quality of the finished product, used fresh and as raw material for further processing. Preservation of currant berries by freezing led to a change in the content of heavy metals: an increase in manganese, copper, iron and a decrease in nickel, zinc, cadmium, cobalt.
Influence of the prebiotic feed additive “VetoKislinka” on the immune resistance of the blood and the intensity of growth of calves of milk-feeding period
Authors: Khaziakhmetov F S , Shagivaleev B R , Butylyov A V , Tsareva O Yu , Safiulova J R
Published: March 2021

The results of studying the effect of the prebiotic feed additive “VetoKislinka” on the immune resistance of the blood and the growth rate of calves of the milk-feeding period are presented. Calves of the control group received a basic diet without the inclusion of the studied prebiotic. The calves of the experimental groups, in addition to the basic diet, were fed the prebiotic VetoKislinka at a dose of 0.8, 1.0 and 1.2 ml per 1 liter of drinking water from 6-10 to 90 days of age, daily, 2 times per day (50% of the daily value). According to the research results, it was found that the effective dose of the prebiotic feed additive “VetoKislinka” was a dose of 1 ml per 1 liter of the drinking dose, where the phagocytic activity of the blood was 5.4 abs % higher than in the first control group. The average daily gain of calves was significantly higher by 9.8%, while reducing feed costs per 1 kg of live weight by 8.8%. The economic efficiency from the introduction of the prebiotic additive “VetoKislinka” into the diet of calves, at a dose of 1 ml/head per 1 liter of drinking water, per 1 calf was 561.6 rubles.
Research of weight and linear wear from resource indicators of cultivator paws hardened by combined method
Authors: Vasilenko M O , Rogovskii I L , Voinash S A , Maksimovich K Yu , Sokolova V A , Garbuzova T G , Meshcheryakov S A , Ariko S Ye
Published: March 2021

The article presents the results of theoretical and experimental studies of weight and linear wear from resource indicators of cultivator paws hardened by the combined method. It is established that in order to achieve an increased resource of cultivator legs, world manufacturers use special alloying materials, design features and technological methods of hardening, namely heat treatment, application of wear-resistant materials. The most commonly used methods for strengthening the working surfaces of parts are conventional hardening of medium-carbon, high-carbon and alloy steels. The hardness of the metal can be obtained in the range of 45 HRC for steel 45 and up to 65 HRC for steel 65G and alloy steels. To determine the change in the geometric parameters of the blades of cultivator legs during production tests recorded linear wear, weight wear and the radius of rounding of the cutting edge of the working bodies with an operating time of 8, 23, 42 and 54 ha. According to the results of linear wear of the wings of experimental cultivator paws during production tests, the materials that provide the best performance against abrasive wear were determined. As a result of the analysis of cultivator paws with a yield of 54 ha, it was found that the working bodies do not have visible damage and extreme wear and are suitable for further use. At the same time, measurements showed that the amount of wear on the width of the blade is 5.3–11.9 mm.
Results of semi-finished horse meat products research using protein fortifiers after heat treatment
Authors: Zhumanova G T , Shadrin M A , Grunina A A , Sultonov B A , Yakunina V N
Published: March 2021

Meat products play a key role in human nutrition. It is necessary to introduce and apply new, extraordinary approaches to solving a number of problems in order to intensify technological processes and create environmentally safe, harmless and optimal technologies for processing raw materials. In the production of meat products, the main requirement for raw materials is its balance in all ingredients, proteins, fats, carbohydrates, minerals, as well as the balance of proteins in amino acid composition. Horse meat fully meets this requirement. One of the most dynamically developing branches of the meat industry is the production of semi-finished meat products. The purpose of the research is to study semi-finished horse meat products using protein fortifiers after heat treatment. As a result of heat treatment, meat products acquire new characteristic taste, aromatic qualities, a dense texture and are better absorbed. In the steamed test products, the moisture content increased by 1.01%, the fat decreased by 0.87%, and the protein increased by 1.01%. In fried semi-finished products, the loss of vitamins was: thiamine (B1) - 30%, riboflavin (B2) - 10%, niacin (PP) - 15%, tocopherol (E) - 17.5%, A and C - 19.97 and 70 % respectively. In steamed semi-finished products, the loss of vitamins in niacin (B1) - 10%, riboflavin (B2) - 10%, niacin (PP) - 10%, tocopherol (E) - 12.2%, A and C - 15, 02 and 60% - respectively. The study of the mineral composition of fried and steamed semi-finished products showed that the loss of mineral substances was: potassium - 23.3 and 19.8%; sodium - 15 and 10.24%; calcium - 10 and 5.04%; magnesium - 21.9 and 12.75%; phosphorus - 20.1 and 10.7%; iron - 4.98 and 3%; zinc - 5.04 and 2.9%, respectively. In general, 0.81 is consumed from the amount of NAC products exposed to frying; steam treatment: 0.88.
Protein plant-based composites synthesized with transglutaminase
Authors: Kolpakova V V , Gaivoronskaya I S , Kovalenok V A , Slozhenkina M I , Mosolov A A
Published: March 2021

The aim of the work was the optimization of parameters for the synthesis of protein composites with an increased biological value from dry wheat gluten and pea, rice, amaranth, potato, oat concentrates with the enzyme transglutaminase. Using the program developed on the base of Monte Carlo counting method, taking into the amino acid composition of the concentrates, were determined ratios and amino acid score for the protein-protein composites: dry wheat gluten (DWG), concentrates: pea (PEC), potato (POC), oat (OC), rice (RC), amaranth (AMC). Composites of composition DWG / PEC, DWG / POC, DWG / AMC, POC / OC, PEC / RC, PEC / POC was enriched with deficient amino acids. Using the method of formol titration, was determined the influence duration, concentration of enzyme and hydromodule on the amount of amine nitrogen. Were used methods for planning and processing data in the Matematika and table Curve 3D programs, were obtained equations and optimal values were identified at which the amount of amine nitrogen during the synthesis remained minimal. In the DWG / AMC composite, the functional properties were 1.1–2.0 times higher than the properties of the initial protein products, indicating its greater efficiency in food.