Vol. 2 No. 08 (2020)

Over the centuries, the Karakalpaks have created a type of decoration that looks amazingly
harmonious, perfectly suited to the design of the lawn, taking into account the living conditions,
climate and characteristics of the materials used. In working on the article, the works of ethnographers
and archaeologists were analyzed, which were used as the main sources. According to ethnographers
and art critics, the Karakalpak yurt has its own characteristics in terms of decoration and artistic
solution and silhouette. The article deals with the customs and traditions associated with the yurt. It
reveals the role and significance of the yurt in the life of the Karakalpak people, its educational
component.

The article reveals the content and essence of Geographical Ecology, and shortly the science of
Geoecology. It has been proven which system of sciences it stands for and what specific aspects of
research it consists of.

Continuous model of Lotka-Volter’s on simplex Sm-1 is studied in the article. There was determined a
relationship between tournament and the system of differential square equation, that describes
evolution of genetic systems in Lotka-Volter’s model.

The article deals with the effect of a typical representative of sucking pests on the photosynthetic
apparatus of the plant - the mite, and the effectiveness of measuring photosynthetic activity using a
highly sensitive fluorescent method. Alternatively, photosynthetic apparatus activity was measured
using the fluorescent method, and it was used to assess the degree of pest infestation of the plant,
especially mites, and to determine the plant’s resistance after red light treatment. When damaged by
mites, the long-wave native forms of cotton chlorophyll are disrupted and the electron-transport
chain of the photosynthetic apparatus is blocked. As a result of QN treatment of seeds, the
distribution of algae in plants decreases, while the activity of photosynthetic apparatus, on the
contrary, increases. This means that phyto-chrome photo conversion has a specific effect on the
photosynthetic apparatus.

The article describes the role of economic diagnostics in ensuring the effectiveness of the higher
education institution and the importance of diagnostic principles in management. Scientific
conclusions and practical recommendations related to the economic evaluation of higher education
activities are given.

Based on the analysis of the Debye function, which relates the Debye temperature
 D
and the
measured temperature of the object T, it is shown that the Debye temperature of crystals decreases
with temperature decreasing from room temperature to absolute zero.
It is shown that the Debye temperature at temperature T = 0 K does not depend on the Debye
function, but depends only on the mass of the atom and the amplitude of the zero-point oscillations.
Based on the analysis of the thermal crystal lattice oscillations Debye theory basic assumptions and
experimental data accumulated for recent years, a formula is proposed that relates the Debye
temperature at moderate temperatures D and at absolute zero temperature (T = 0 K) 0. It is shown
that the calculated Debye temperature 0 at the absolute zero temperature according to the
proposed formula in the range from  2 to  13 % coincides with the experimental data taken from
literature for a number of substances of different classes

The article explains the importance of archival materials of the second half of the 19th and the
beginning of the 20th centuries as archival materials, in particular, issues of foundations kept in the
fifth store named as “Head department of Zarafshan region” of CSA RUz (Central State Archive of the
Republic of Uzbekistan) that are the main sources of the history of our country. The source value of
official correspondence, notices, information and records, selected from thousands of records, is
scientifically grounded in the study of the Zarafshan foundation property, status, income and activities
of the Russian administration

This article discusses the main political ties formed as a result of dynastic marriages in Kievan Rus. This
trend is of great importance in Russian history, as dynastic marriages were the basis of the political
structure of the Russian state during the Kievan Rus.

This paper analyzes the psycho physiological changes that occur when exam stress affects healthy
and mentally retarded schoolchildren aged 14-16 years. Psychological and cognitive indicators were
studied. The experiments were conducted in three stages: on a normal school day (control), before
the exam, and after the exam. The analysis of the obtained data showed that during the exam,
healthy schoolchildren experience psycho physiological changes, i.e. the level of stress indicators
(anxiety) increases and cognitive indicators weaken. After the exam, there was a tendency for these
indicators to return to the control level. In contrast to healthy children, mentally retarded
schoolchildren had a high level of anxiety index during the control examination, and their cognitive
indicators were 35% lower than normal. During the examination period, these indicators remained at
a relatively constant level. A comparative analysis of the data showed that depending on the level of
mental development of students, exam stress leads to stress in the psycho-emotional state of
students and this can have a serious impact on their health.

Fund of manuscripts of the State Museum of Literature. Alisher Nava’i of the Academy of Sciences of
the Republic of Uzbekistan contains many ancient sources and lithographs. Today, a number of our
scientists are working on the creation of an electronic catalog of lithographs kept in the museum,
and preparation for publication. Most of the lithographs are works of Nava’i. The article scientifically
describes 8 lithographs of works by Alisher Nava’i, stored in the State Museum of Literature of the
Academy of Sciences of the Republic of Uzbekistan. This article was written within the framework of
the grant “Creation and preparation for publication of an electronic catalog of lithographs stored in
the State Museum of Literature named after Alisher Nava’i”. The descriptions of the grant
participants M. Rashidova and O. Alimov were used.