The article considers illustrative images of plants on the postage stamps as a resource of information of agronomy history. We have shown the technology of education process. The first is the creation of the images base; the second are analysis, comparison, interpretation and search of new information. The method of sketches as the basis of the iconography of plants images was presented in this work. Analysis of the images allowed identifying several thematic blocks. Agriculture, growing in the country, the history of the plants spread, the technology of processing, product export and promotion of agronomic knowledge through agricultural exhibitions. Object of the analysis is a postage stamp. Stamps reflect the whole life of people, their history and modernity, environment, agriculture, science, culture and art. A stamp is a kind of "business card", it is a witness of the era. The main idea of the base images is receiving new knowledge about an object by collecting images, visual analysis, searching for information and studying material; in fact, it is a new approach to obtaining new knowledge, motivated and exciting approach to receive scientific information. Created database of images on the history of agronomy on the basis of stamps allows to use them actively in the learning process, and may be used as the individual topics for researches
In this article, there is a numerical method of solving
the problem of self-organization of the labor
resources. The problem deals with finding
probabilities of hiring and the layoffs of specialists
from the sectors of the labor market. A mathematical
model of labor resources dynamics is used to solve
this problem. The initial problem is incorrect,
because number of equations of the descriptive
system is less than number of unknown variables. A
special algorithm is designed for guaranteed finding
the normal solution in finite number of iterations.
The algorithm is separated into two key stages.
Initially, unconditional normal solution of the
problem is found by applying the modified method of
Gauss for underdetermined systems. Later, this
solution is projected in the subspace of permissible
values. After that, the normal solution of the problem
with consideration of non-negativity of the desired
values is being found by using the gradient projection
method. The proposed algorithm has been
successfully used to develop application in
programming environment C++. This application is
focused on solving of the problem of selforganization
of the labor resources. Comparative
analysis of speed of the application and add-ins MS
Excel "Solver" showed that the same problem is
solved much faster in the application designed by the
author than in a table processor MS Excel when
using the add-in "Solver". This demonstrates the high
efficiency of the proposed method
Adventive weeds control using classical approach of biological protection against adventive species is not always satisfactory. A new method of the ragweed inhibition is developed that is based on shifting of the natural phenological stage of the phytophage growth. It makes possible to produce a large group of ragweed noctuidae under laboratory conditions on an artificial nutrient medium and to inundate weed infested areas with them by the time of the invader emergence
Creation of hydraulic fracturing in the physical structure
of the reservoir rock is one important way to improve the
productivity of oil and gas wells. These artificial
channels increase ability of the reservoir rock for
conducting hydrocarbons to the wellbore. In this study a
new approach has been proposed for optimization of
fracture half length in hydraulic fracturing operation.
Also, this new method that is a combination of various
fracturing geometry models has been proposed for
modeling the hydraulic fracturing geometry. We have
shown that there is a reasonable agreement between the
result of pseudo 3D fracture geometry model and the
predicted results from the proposed approach
We have proposed the general scheme for studying the stability of the conclusions obtained by mathematical methods and models regarding tolerance deviations of the original data and background models. The concrete problems of stability are discussed: towards a change of data, its size and distributions, to allowable transformations measurement scales, to the temporal characteristics (time of start of the project, the planning horizon). Reducing the uncertainty can be conducted by changing the type of data, i.e. with the aid of the transition to non-numerical data.
The models of concrete management processes of industrial organizations are considered on the examples of stability characteristics of investment projects to change the discount factors and in models of inventory management to change in the coefficients of the model and batch size production
A methodology for a multilevel system approach to
integrated optimization of processes of harvest,
transportation and cleaning of the grain during the
harvest by the method of «Neveyka» has been
developed. The main method of research - is a
queuing theory of all components of the yield except
straw. The System consists of 6 interconnected
subsystems with their inputs and outputs, and its own
optimality criteria. On the first level of optimization,
the most efficient way of wheat harvest «Neveyka»
has been proved. On the second level - the total
duration of the harvest with allowance for 4-5
cultivated wheat sorts, each of which is harvested
within 5 calendar days, was optimized. The third
level proves the requirement of combine harvesters
and transport vehicle. On the fourth level - the
combinations of harvesting and transport units are
optimized on the criterion of the minimum amount of
the loss on the mutual expectations of harvesters and
vehicles. The fifth optimization level proves the
capacity of the reception station of the grain storage,
where the main criterion for optimality is the least
amount of losses on the mutual waiting time of the
transportation vehicles, and the additional criterion is
the minimum waiting time of vehicles in the queue.
On the sixth and the final stage the specific annual
economic effect (rub/ha or rub/t) from the
implementation of the proposed technology is
determined. It is established, that during the grain
harvesting, transporting and processing of heap there
are elementary or Poisson probability flows of
requirements for service. The Representation of
harvesting - transport link in the form of closed
queuing system of independent harvesting unit. An
approach to the justification of failure-free operation of a station for cleaning grain heap and storage of
grain and chaff is presented
Isolation of high-quality RNA from the tissues of perennial woody plants, including woody grape vines, is very difficult due to the high content of phenolic compounds, secondary metabolites and polysaccharides and the ribonuclease activity of destroyed tissues. Most of the existing methods require either large time or financial costs, or do not give reproducible results in the case of RNA extraction from mature grape tissues. The modified isolation protocol is based on a combination and modification of the known RNA extraction methods, taking into account the characteristics of mature grape tissues. Existing commercial kits for the isolation of RNA from plant tissues showed a low efficiency of RNA extraction from mature grape tissues, primarily associated with "varietal specificity". Reproducible results in the extraction of RNA showed CTAB-method, however, it has several significant drawbacks associated with the duration of the extraction and the complexity of the processing of an RNA preparation with a DNAase. The developed method is based on increasing the concentration of mercaptoethanol and polyvinylpyrrolidone in the extraction buffer, eliminating the stage of RNA selective precipitation via LiCl, and replacing it with deposition on a silica-based membrane (SiO2) followed by processing with DNA-ase. and increase the purity of the preparation of RNA from genomic DNA in comparison with the original method. A modified isolation protocol was developed based on a combination and modification of known RNA extraction methods, taking into account the characteristics of mature grape tissues. This solution allows to obtain reproducible quantity and quality of RNA for the subsequent synthesis of cDNA and RT-PCR
Potato has been and remains one of the five world's
most important crops. For nearly two hundred years
potato in Russia is the "second bread". This is one of
the so-called social products. Over the past 20 - 25
years of potato farming in our country, there have been
significant changes, both positive and negative. Today,
potatoes are grown in different soil and climatic
conditions in more than one hundred countries around
the world, including the desert oasis and beyond the
polar circle. Potato cultivation Center recently has
moved to Asia. In our time, the leaders of potato
production are China, Russia, India, the US and
Ukraine. Over the past few decades the number of
produced potatoes has increased by 41% and the area under potato planting only 9.5%. From the above data
it is clear that the world potato economy in recent
years has got significant changes, indicating that the
timeliness and relevance of the material in this article
is true
The aim of the study is to describe the concept of
conflict linguistic personality and construct a model of
linguistic identity. By summing up common features of
the individual personalities we have created the model
of conflict linguistic personality, based on three levels:
verbal-semantic, cognitive and pragmatic. 1. Verbal -
semantic level. Unlike other subtypes of conflict
discourse, everyday conflict discourse is characterized
by slang, invective, obscene vocabulary. Another
feature of everyday conflict discourse is familiarity.
Imperatives are also among the characteristic features
of conflict. There are also some non-verbal components
that play an important role in constructing the model of
conflict linguistic personality, such as gestures and
mimicry. 2. Cognitive level. Typical conflict linguistic
personality rarely tries to mince the words at the peak
of the conflict, so his/her cultural level comes "through
the language." 3. Pragmatic level. On this level diverse
and even opposing tactics are possible depending on
the purpose of conflict linguistic personality, as well as
his/her social role and psychological state at the
moment. The cooperative tactics include: acceptance,
conviction, compassion, assignment, promise, etc. Noncooperative
tactics include: mockery, accusation,
insults, threats, pressure, interruption, provocation
A model for minority carrier mobility in polysilicon emitter contacts is developed. It is based on the effect of the segregation of electrically active dopants to polysilicon grain boundaries and the thermionic emission - diffusion theory of the hole current. An analytical equation is derived which allows to calculate hole mobility in polysilicon emitter contacts and its dependence on dopant concentration and polysilicon grain size