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SCIENTIFIC AND THEORETICAL FOUNDATIONS OF  ECONOMIC AND GEOGRAPHICAL STUDIES OF POPULATION GROWTH AND PLACEMENT

Ibragimov Lutfullo

Samarkand State University, Samarkand, Uzbekistan

Corresponding author email: ibragimovlutfullo@gmail.com

Sherxolov Olimjon

Uzbekistan-Finland Pedagogical Institute, Uzbekistan,

E-mail: olimjonsherxolov@gmail.com

Barotova Gulmira

Samarkand State University, Samarkand, Uzbekistan

E-mail: gulmira-barotova95@mail.ru

Maxmudova Gulmira

Presidential school in Samarkand, Uzbekistan

Otayorovagulmera@gmail.com

ABSTRACT: This article examines the factors influencing population growth and placement. Scientific sources from foreign, CIS countries and domestic scientists are represented by scientific, theoretical and methodological works on the growth, dynamics and distribution of the population. A demographic transition period has been identified. Issues of territorial organization of the population were also studied.

[Ibragimov Lutfullo, Sherxolov Olimjon, Barotova Gulmira, Maxmudova Gulmira. SCIENTIFIC AND THEORETICAL FOUNDATIONS OF ECONOMIC AND GEOGRAPHICAL STUDIES OF POPULATION GROWTH AND PLACEMENT. Nat Sci 2024,22(7):1-5]. ISSN 1545-0740 (print); ISSN 2375-7167 (online). http://www.sciencepub.net/nature 01. doi:10.7537/marsnsj220724.01.

KEY WORDS: Population growth, population density, birth rate, mortality, migration, population distribution, natural factor.

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MEAN FREE PATH AND WAVELENGTH OF ELECTRON AT FERMI LEVEL OF METALS

^G.         E. Adesakin¹, F.O. Ogunlana² T.H. Akande¹, O.G.Edema³, J.O. Chukwu⁴, O. O. Olusola², , O.D. Afe¹, O.A. Fasiku¹, Agbetuyi Oluranti Adegoke¹ and Faruq Oyediran¹

¹Department of Physics, Ekiti State University, Ado-Ekiti, Nigeria

²Department of Physics, Bamidele Olumilua University of Education, Science and Technology, Ikere Ekiti, Nigeria

³Department of Physics with Electronics, Federal Polytechnic, Auchi, Edo State, Nigeria

⁴Federal College of Education (Technical) Ekiadolor, Benin City, Edo State

G-mail of corresponding author: adesakingbenga@gmail.com

Abstract

Mean free path and wavelength of electron at Fermi level for different groups and periods of metals were computed and studied based on the theory of free electron formalism using the knowledge of Fermi gas. Result obtained for the wavelength of electron at Fermi level is in good agreement with theoretical experimental value. This prove the validity of the theory of free electron formalism in theoretical predictions of some properties of metals. Result obtain in this work shows that mean free path of metal depend on number of valence electron, electronic concentration and collision frequency. Mean free path of metals decreases as strain (deformation) increases due to an increase in electron radius. Wavelength of electron at Fermi level reduces as the experimental value of Fermi energy of metals increases. Wavelength of electron at Fermi level increases as strain increases due to an increase in the internal degree of freedom.

[E. Adesakin, F.O. Ogunlana  T.H. Akande, O.G.Edema, J.O. Chukwu, O. O. Olusola , O.D. Afe, O.A. Fasiku, Agbetuyi Oluranti Adegoke and Faruq Oyediran. MEAN FREE PATH AND WAVELENGTH OF ELECTRON AT FERMI LEVEL OF METALS. Nat Sci 2024,22(7):6-14]. ISSN 1545-0740 (print); ISSN 2375-7167 (online). http://www.sciencepub.net/nature 02. doi:10.7537/marsnsj220724.02.

Keywords:    Metals, Electron, Fermi Energy, Wavelength, Mean Free Path.

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A study on Anaemia among Adolescent Girls in District pulwama

Irshad Ahmad, Syed Bushra Muzamil

Employee department of Education Central University of Kashmir

Dept. of drinking water and sanitation  of J&K

Abstract: India has the world’s highest prevalence of iron deficiency anaemia among women, with 60 to 70 percent of the adolescent girls being anaemic. Adolescence is considered as a nutritionally critical period of life. The present study is an effort to study the prevalence of iron deficiency of anaemia among adolescent girls. The study was conducted on a sample of 60 adolescent girl students from four different secondary schools of district pulwama. Self constructed Questionnaire was developed by the investigator were used for data collection. Significant results were found that the students which belong to govt. school are more anaemic than private schools.

[Irshad Ahmad, Syed Bushra Muzamil. A study on Anaemia among Adolescent Girls in District pulwama. Nat Sci 2024,22(7):15-25]. ISSN 1545-0740 (print); ISSN 2375-7167 (online). http://www.sciencepub.net/nature

03. doi:10.7537/marsnsj220724.03.

Keywords: Anaemia; Adolescent; Girl; District pulwama

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The Increase In Aerosols Released Into The Air And Its Geoecological Consequences

¹Mirabdullaev Bakhodirjon Bakhromjon ugli, ²Mirzahmedov Ismoiljon Karimjon ugli

¹1st-level master's student, majoring in Geography, ²Doctor of Philosophy in Geography

Namangan State University, Namangan, 160119, Uzbekistan

E-mail address: ismoil_landsat@mail.ru

Abstract. This article describes the negative effects of changes in the composition of atmospheric gases, chemical emissions in the air that is to aerosols. The increase in the quantity of aerosols in the air of the city of  Namangan over the years was analyzed and the impact of such chemical waste in the air on human health was studied.

[Mirabdullaev Bakhodirjon Bakhromjon ugli, Mirzahmedov Ismoiljon Karimjon ugli， The Increase In Aerosols Released Into The Air And Its Geoecological Consequences. Nat Sci 2024,22(7):26-31]. ISSN 1545-0740 (print); ISSN 2375-7167 (online). http://www.sciencepub.net/nature 04. doi:10.7537/marsnsj220724.04.

Key words. Aerosols, carbon dioxide, dust, radioactive substances, plastic waste, bronchial asthma, air concentration, "Lime method".

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ASSESSMENT OF NUTRITIONAL STATUS AND DIETARY PATTERN OF RURAL AND URBAN RETIREES IN SELECTED COMMUNITIES OF SOUTH-WEST NIGERIA

Obisesan, D. O¹., Alaka, F. A²., Odunayo, A. A¹. & Aanu-Bakare, G. O¹.

¹Department of Home Economics, Federal College of Education (Special), Oyo

²Department of Agriculture, Federal College of Education (Special), Oyo

Correspondence: akinsola4gold@gmail.com//obisesandorcas@gmail.com

Abstract: The study assessed nutritional status and dietary pattern of rural and urban retirees in selected communities in South-West Nigeria. Four research questions were raised to guide the study and two hypotheses were formulated and tested at 0.05 level of significance. The study adopted a descriptive survey design with a 420 respondents. Three instruments were used for the study which is laboratory analysis, structured questionnaire and measurement of anthropometric indices. The instrument was validated by experts while its reliability test was done using Pearson Product-Moment Correlation which yielded a co-efficient of 0.83. Frequency, Percentage, Mean and Standard Deviation were used to answer research questions while Pearson Correlation Coefficient was used to test the hypothesis. The results of the study showed that level of food intake was high but low in quality, more than half of the retirees are at a high nutritional health risk, the nutritional status was normal for male retirees and risky for female. Furthermore, the relationship between food intake and nutritional status is insignificant for rural retirees but, low, negative and significant for rural and urban retirees in selected community in South-West Nigeria. The study recommended, among others, that proper attention should be given to retirees’ food intake to reduce the observed prevalence of nutrient deficit in order to improve their quality of life.

[Obisesan, D. O, Alaka, F. A, Odunayo, A. A. & Aanu-Bakare, G. O. ASSESSMENT OF NUTRITIONAL STATUS AND DIETARY PATTERN OF RURAL AND URBAN RETIREES IN SELECTED COMMUNITIES OF SOUTH-WEST NIGERIA. Nat Sci 2024,22(7):32-39].ISSN1545-0740(print);ISSN2375-7167(online).http://www.sciencepub.net/nature   05. doi:10.7537/marsnsj220724.05.

Keywords: Anthropometric indices, food intake, nutritional status, quality of life, retirees.

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