scholarly journals ESTIMATION OF STATURE FROM CEPHALIC DIMENSIONS IN A NIGERIAN POPULATION. Estimación de la estatura por las dimensiones cefálicas en una población nigeriana

2016 ◽  
Vol 7 (1) ◽  
pp. 17-25 ◽  
Author(s):  
Ukoha U Ukoha ◽  
Kosisochukwu E Umeasalugo ◽  
Onochie O Udemezue ◽  
Lasbery A Asomugha
Keyword(s):  
Head Circumference ◽  
Head Length ◽  
Regression Equations ◽  
Male And Female ◽  
Head Breadth ◽  
Nigerian Population ◽  
Las Mujeres ◽  
The Relationship ◽  
Male Subjects ◽  
Horizontal Head

Objetivos: El presente estudio trata de examinar la relación entre la estatura y dimensiones cefálicas en la etnia Igbo de Nigeria y proponer un modelo de regresión para estimar la estatura cuando las dimensiones cefálicas están disponibles. Materiales y Métodos: 500 sujetos (261 varones y 239 mujeres) de edades comprendidas entre 18 y 30 años, que vive en Nnewi, Nigeria, participaron en el estudio. La estatura y tres dimensiones cefálicas (longitud cabeza, amplitud cabeza y circunferencia de la cabeza horizontal) se tomaron de cada individuo. La estatura se tomó como la altura en posición de pie, y se midió (en centímetros) usando un metro de altura. La longitud de la cabeza fue tomada como la distancia occipito-frontal, y se midió (en centímetros) con un calibre deslizable Mitsutoyo.  El tamaño de la cabeza fue tomada como la distancia máxima biparietal, y se midió (en centímetros) usando un calibre deslizante Mitsutoyo. Se midió la circunferencia horizontal de la cabeza (la distancia desde la glabela alrededor del cráneo de nuevo a la glabela) (en centímetros) usando una cinta métrica. Principales Resultados: Los resultados mostraron una correlación significativa de las dimensiones cefálicas con estatura en las mujeres (p<0,01). Para los varones, la circunferencia horizontal y la longitud de la cabezal tuvieron correlación significativa con la talla (p<0,05), mientras que la amplitud cabeza se correlacionó de manera insignificante (p>0,05). Las ecuaciones de regresión también se formularon para estimar la estatura de dimensiones cefálicas para sujetos masculinos y femeninos. Conclusión: El estudio mostró que la circunferencia horizontal y la amplitud de la cabeza es mejor predictor de la estatura que la longitud cefálica, y que las dimensiones cefálicas se puede utilizar para estimar la estatura. Objectives: The present study sought to examine the relationship between stature and cephalic dimensions in the Igbo ethnic group of Nigeria, and to propose a regression model for stature estimation when the cephalic dimensions are available. Materials and Methods: 500 subjects (261 males and 239 females) between the ages of 18 and 30, living in Nnewi, Nigeria, participated in the study. Stature and three cephalic dimensions (head length, head breadth and horizontal head circumference) were taken on each individual. Stature was taken as standing height, and was measured (in centimeters) using a height meter. Head length was taken as the occipito-frontal distance, and was measured (in centimeters) with Mitsutoyo sliding calipers. Head breadth was taken as the maximum biparietal distance, and was measured (in centimeters) using Mitsutoyo sliding calipers. Horizontal head circumference (the distance from the glabella around the cranium back to the glabella) was measured (in centimeters) using a metric tape. Main Results: The results showed significant correlation of cephalic dimensions with stature in the females (p<0.01). For the male subjects, horizontal head circumference and head length had significant correlation with stature (p<0.05) while head breadth was insignificantly correlated (p>0.05). Regression equations were also formulated for estimating stature from cephalic dimensions for the male and female subjects. Conclusion: The study showed that horizontal head circumference and head breadth were better predictors of stature than head length, and that the cephalic dimensions can be used to estimate stature.

scholarly journals Measurement of Cephalic Indices in Older Children and Adolescents of a Nigerian Population

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Babatunde Olayemi Akinbami
Keyword(s):  
Head Length ◽  
Cephalic Index ◽  
Older Children ◽  
School Students ◽  
Niger Delta Region ◽  
Bony Landmarks ◽  
Biparietal Diameter ◽  
Head Breadth ◽  
Nigerian Population ◽  
Age Range

Background. A study on the cephalic index was carried out on subjects from school students in Ogbia tribe of Bayelsa state in the Niger Delta region of Nigeria. This study determined the cephalic indices among the school students. In the present study, seven hundred subjects were randomly selected from secondary schools comprising 350 males and 350 females, respectively, with age range from 11–20 years, with both parents and grandparents of Ogbia tribe. The length and breadth of the head were measured using a spreading caliper from standard bony landmarks. The measurable point for head length was measured between the glabella and inions while the head breadth was the widest biparietal diameter. The cephalic index was head breadth divided by the head length and multiplied by 100. The result showed that the mean cephalic index was 76.56. Males had a cephalic index of 77.21, while females had a cephalic index of 76.50. Based on this study, 78.68% of individuals were mesocephalic, 11.4% dolichocephalic, 9.0% Brachycephalic, and 0.43% hyperbrachycephalic. This research showed that the school students have mesocephalic phenotype. The data from this research will be useful in anthropology, genetics, forensic medicine, and clinical practice.

scholarly journals Pattern of Cephalic Index among Medical Students of a Medical College of Eastern Nepal

2019 ◽  
Vol 15 (4) ◽  
pp. 256-259
Author(s):  
Raju Kumar Chaudhary ◽  
Sanjib Kumar Sah ◽  
Surya B. Parajuli ◽  
Suman Pokhrel ◽  
Santosh K. Deo
Keyword(s):  
Medical Students ◽  
Teaching Hospital ◽  
Head Length ◽  
Cephalic Index ◽  
Male And Female ◽  
Medical College ◽  
Head Breadth ◽  
The Mean ◽  
The Difference ◽  
Head Type

Background Cephalic index (CI) is one of the important anthropometric parameters to determine racial variation.  Studies done in Nepal has made a comparison of cephalic index for castes (Tharu, Brahmin, Chhetri, Newar), races (Mongoloids and Aryans) but lacks sex variation. The objective of this study was to find the difference in the cephalic index between two genders and to find the sequence of most predominant to least common head type in different genders among the Medical Students of Birat Medical College & Teaching Hospital (BMCTH). Methods A cross-sectional study conducted in the department of Anatomy of BMCTH from 1 July 2019 to 1 September 2019 comprising of 256 medical students (133 male and 123 female) aged between 18 to 24 years. Head length, head breadth and cephalic index were the variables measured using standard devices and techniques. Ethical clearance was taken from the Institutional Review Committee (IRC) of Birat Medical College & Teaching Hospital, Nepal. Results The mean cephalic index in male and female is found to be 81.41 ± 4.52 and 83.62 ± 4.08 respectively. Statistically significant difference found between gender in terms of head length males (18.78±0.69) and females (17.71 ± 0.60); head breadth males (15.28 ±0.62) and females (14.79 ±0.57). The mean cephalic index in males is 81.41 ± 4.52 varying from 69.31 to 94.48. In females, the cephalic index varied from 74.74 to 93.14 and the mean cephalic index is 83.62 ± 4.08. The difference between male and female cephalic index is found to be statistically significant. Majority (43.75%) had Brachycephalic head (CI>79.9) followed by Hyperbrachycephalic (26.95%), Mesocephalic (25.39%), and Dolicocephalic (3.90%). Conclusion Cephalic index is significantly high in female as compared to male whereas head length and breadth are significantly high in males than females. It confirms sexual dimorphism exists. Brachycephalic is the commonest head type.  

scholarly journals Use of Head Circumference as a Predictor of Height of Individual

2015 ◽  
Vol 12 (2) ◽  
pp. 89-92 ◽  
Author(s):  
DI Mansur ◽  
MK Haque ◽  
K Sharma ◽  
DK Mehta ◽  
R Shakya
Keyword(s):  
Forensic Anthropology ◽  
Head Circumference ◽  
Significant Positive Correlation ◽  
Female Students ◽  
Age Group ◽  
Medical Sciences ◽  
Statistical Software ◽  
Legal Cases ◽  
Male And Female ◽  
The Relationship

Background Establishing personal identity is one of the main concerns in forensic investigations. In forensic anthropology, estimation of height from head circumference has a significant role in establishing personal identity.Objective The objective of the present study was an attempt to understand the relationship between height and head circumference of an individual and to derive regression formulae to estimate the height from the head circumference.Method The present study consisted of 440 (258 male and 182 female) students of age group 17 to 25 years studying in Kathmandu University School of Medical Sciences, Dhulikhel, Nepal during the period from November 2012 to October 2013. Height and head circumference of an individual were measured in centimeter. Data were analyzed by using statistical software SPSS-16Result The findings of the present study were significant correlation between height and head circumference (r = 0.443, p < 0.01 for male, r = 0.302, p<0.01 for female, and r = 0. 398, p < 0.01 for combined (male and female). The regression equation for height and head circumference was found to be Y = 1.734X + 70.36 (R2 = 0.196) for male, Y = 0.916X + 106.8 (R2 = 0.091) for female, and Y = 1.648 X + 71.69 (R2 = 0.158) for combined (male and female), where Y is the height of Individual and X is the Head Circumference.Conclusion Head circumference showed highly significant positive correlation with individual’s height. Therefore, the present study will help in medico-legal cases in establishing the identity of an individual and this would also be useful for Anatomists and Anthropologists.Kathmandu University Medical Journal Vol.12(2) 2014: 89-92

scholarly journals Supply in the Russian labor market: gender aspect

POPULATION ◽  
2021 ◽  
Vol 24 (3) ◽  
pp. 191-205
Author(s):  
Evgeny Vinokurov ◽  
Natalia Vinokurova
Keyword(s):  
Labor Market ◽  
Labor Supply ◽  
Economic Activity ◽  
Activity Level ◽  
Regression Equations ◽  
Real Wages ◽  
Men And Women ◽  
Male And Female ◽  
The Relationship ◽  
Gender Aspect

The article deals with the economic activity of the Russian population both in general and in the gender aspect. The main attention in the work is focused on the relationship between the economic activity of population and wages. The objectives of the work are, firstly, to identify differences in the behavior of men and women in the labor market in terms of economic activity, and, secondly, to test the hypothesis on the relationship between the economic activity of population and wages. The article provides an overview of the factors affecting the size of labor force and the level of participation in it, as well as statistical data reflecting male and female economic activity in modern Russia. Analysis of the labor activity dynamics leads to the conclusion that there are significant differences in male and female behavior in the labor market. The main cause of these differences is the traditional views of the population on the roles of men and women in society. Also the regression equations connecting the level of economic activity with the average real wage are determined both for the population of the Russian Federation as a whole, and for men and women separately. These equations can be considered as modified functions of the labor supply. Calculations have shown that, despite the general linear nature of the dependence of the economic activity level of population on real wages, its growth leads, ceteris paribus, to an accelerating increase in the activity of men and a slowing increase in the activity of women. The revealed low elasticity of labor supply functions indicates that any significant impact on the level of labor activity can only be provided by significant increase in real wages. First of all, the last statement applies to women.

scholarly journals Height estimation from head dimensions in South-South Nigeria

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Dennis E. O. Eboh ◽  
John O. Ohaju-Obodo
Keyword(s):  
Head Circumference ◽  
Regression Models ◽  
Body Height ◽  
The Body ◽  
Head Length ◽  
Head Width ◽  
Height Estimation ◽  
Relationship Of ◽  
The Relationship ◽  
Combined Data

Abstract Background Height estimation is an important stage of forensic investigation to identify an unknown person. The problem of unidentified human remains in the study area, due to local militia activities, kidnapping, and murder, necessitated this study to assess the correlation between the body height and head dimensions and to formulate regression models for estimation of height that are population and gender-specific. Materials and methods The study involved 952 subjects (464 males and 488 females), aged 18–30 years, from five ethnic groups and sampled from six universities in South-South Nigeria. Stature, head circumference, head length, and head width were measured using a standard anthropometric method. The data collected were analyzed using IBM SPSS Statistics 20. Statistical significance was pegged at p < 0.05. Results There was a significantly greater head dimension in males compared to females. There was a significant relationship between height and head dimensions in the majority of data. The relationship of the head circumference with stature was strongest in male data among the Bekwara and combined data among the Esan and Urhobo. Regarding the head length, the strongest relationship was in females and combined data among Bekwara, and males and combined data among the Ogbia had the strongest relationship. The relationship of stature with the head width was strongest in males and combined data among the Bekwara, and female data among the Ogbia. Conclusion This study showed that head dimensions can be used as tools in the height reconstruction of an individual using simple and multiple regression models, and this has medico-legal implication.

Relationship between Faithfulness and Preference of Stars in a Planetarium

2019 ◽  
Vol 2 (1) ◽  
pp. 10402-1-10402-11
Author(s):  
Midori Tanaka ◽  
Takahiko Horiuchi ◽  
Ken’ichi Otani
Keyword(s):  
Light Source ◽  
Preference Rating ◽  
Experimental Procedure ◽  
Male And Female ◽  
Astronomical Observations ◽  
Low Luminance ◽  
Projection Pattern ◽  
The Relationship ◽  
Star Field

Abstract A planetarium imitates a starry sky with physical and technical limitations using a dome, projector, and light source. It is widely used for entertainment, and astronomy and physics educations. In our previous study, we investigated the evaluation for faithful reproduction of a star field in a planetarium by performing psychometric experiments with 20 observers for plural projection patterns with different reproduction factors (color, luminance, and size of projected stars). In this study, we investigate the relationship between faithfulness and preference of a star field in a planetarium through a psychometric experiment with 47 observers. The experimental procedure followed the previous study. The rating of faithfulness improved for the projection pattern with a smaller star size. For the preference evaluation, the projection pattern with low luminance significantly lowered the preference rating. The results of the experiment indicate that the preferable star reproduction was different between male and female observers, whereas the faithful star reproduction was not significantly different in the evaluations between male and female observers. The male observers sought a faithful star reproduction as the preferred reproduction. In contrast, the female observers did not feel the faithful star reproduction preferable, and evaluated the more brilliant star reproduction as the preferred reproduction. These results were not dependent on the experience in astronomical observations.

THE MODEL FOR MANAGING INVESTMENTS IN THE MOSCOW ENVIRONMENT BASED ON A POWER REGRESSION EQUATION

2020 ◽  
Vol 2 (7) ◽  
pp. 91-99
Author(s):  
E. V. KOSTYRIN ◽  
◽  
M. S. SINODSKAYA ◽  
Keyword(s):  
Solid Waste ◽  
Influencing Factors ◽  
Pair Correlation ◽  
Approximation Error ◽  
Regression Equation ◽  
Regression Equations ◽  
The Impact ◽  
The Relationship ◽  
Average Approximation ◽  
Average Approximation Error

The article analyzes the impact of certain factors on the volume of investments in the environment. Regression equations describing the relationship between the volume of investment in the environment and each of the influencing factors are constructed, the coefficients of the Pearson pair correlation between the dependent variable and the influencing factors, as well as pairwise between the influencing factors, are calculated. The average approximation error for each regression equation is determined. A correlation matrix is constructed and a conclusion is made. The developed econometric model is implemented in the program of separate collection of municipal solid waste (MSW) in Moscow. The efficiency of the model of investment management in the environment is evaluated on the example of the growth of planned investments in the activities of companies specializing in the export and processing of solid waste.

scholarly journals Sodium Metasilicate Cemented Analogue Material and Its Mechanical Properties

2016 ◽  
Vol 2016 ◽  
pp. 1-17 ◽  
Author(s):  
Songlin Yue ◽  
Yanyu Qiu ◽  
Pengxian Fan ◽  
Pin Zhang ◽  
Ning Zhang
Keyword(s):  
Complex Geometry ◽  
Sodium Metasilicate ◽  
Raw Material ◽  
Fine Aggregate ◽  
Regression Equations ◽  
Deformation And Failure ◽  
Orthogonal Experiments ◽  
Low Modulus ◽  
New Type ◽  
The Relationship

Analogue material with appropriate properties is of great importance to the reliability of geomechanical model test, which is one of the mostly used approaches in field of geotechnical research. In this paper, a new type of analogue material is developed, which is composed of coarse aggregate (quartz sand and/or barite sand), fine aggregate (barite powder), and cementitious material (anhydrous sodium silicate). The components of each raw material are the key influencing factors, which significantly affect the physical and mechanical parameters of analogue materials. In order to establish the relationship between parameters and factors, the material properties including density, Young’s modulus, uniaxial compressive strength, and tensile strength were investigated by a series of orthogonal experiments with hundreds of samples. By orthogonal regression analysis, the regression equations of each parameter were obtained based on experimental data, which can predict the properties of the developed analogue materials according to proportions. The experiments and applications indicate that sodium metasilicate cemented analogue material is a type of low-strength and low-modulus material with designable density, which is insensitive to humidity and temperature and satisfies mechanical scaling criteria for weak rock or soft geological materials. Moreover, the developed material can be easily cast into structures with complex geometry shapes and simulate the deformation and failure processes of prototype rocks.

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