scholarly journals HISTOMORPHOMETRIC ESTIMATION OF AGE FROM BONE SAMPLES OF NIGERIANS

2021 ◽  
Vol 6 (2) ◽  
pp. 67-76
Author(s):  
C. D. Orupabo ◽  
L. E. Oghenemavwe ◽  
T. E. Diamond
Keyword(s):  
Age Estimation ◽  
Significant Variation ◽  
Descriptive Statistics ◽  
Haversian Canal ◽  
Canal Diameter ◽  
Bone Fragments ◽  
Bivariate Regression ◽  
The Mean ◽  
Secondary Osteons ◽  
Strong Inverse Relationship

Background. Age estimation is crucial in creating the biological profile of unknown skeletal remains and recently there is emphasis on the need to develop population specific forensic baseline data for easy identification of these remains. Objective. The aim of this study is to estimate age from the histomorphometric features of the bones of Nigerians. Methods. Fragments of non-pathologic bone samples were collected during orthopaedic procedures. Ground sections were prepared using Modified Frost’s manual method of bone preparation to determine the following histologic parameters; haversian canal diameter (HCD), primary and secondary osteons, number of osteon fragments and non-haversian canal as well as haversian canal area (HCA). 29 subjects aged 35 to 85 years old were used for the study. Bone fragments included samples from the femur, tibia, humerus, and the vertebrae. Data obtained were subjected to descriptive statistics, Pearson’s correlation, bivariate regression equation, Student t-test and analysis of variance (ANOVA). Results. The mean age for our population was 58.86 years old. ANOVA showed significant variation in the average HCD for the various regions: humerus=8.45±2.48, femur=7.09±4.06, tibia=8.70±2.52 and verte­brae=3.69±0.73. There was a strong inverse relationship between age and primary osteons. The total number of osteon fragments increased with age while total number of primary osteons and average HCD decreased with age. The HCA, though statistically insignificant, also decreased with age. Conclusion. Our findings show that three histomorphometric parameters showed significant correlation with age: osteon fragments (OS-f), primary osteons (OS-p) and HCD. The histomorphometric parameters were therefore relevant in age estimation.   Objective: The aim of this study is to estimate age from the histologic features of the bones of Nigerians.   Methods: Fragments of non-pathologic bone samples were collected during orthopaedic procedures. Ground sections were prepared using Modified Frost’s manual method of bone preparation to determine the following histologic parameters; haversian canal diameter (HCD), primary and secondary osteons, number of osteon fragments and non haversian canal as well as haversian canal area (HCA). 29 subjects aged 35 to 85 years were used for the study. Bone fragments included samples from the femur, tibia, humerus, and the vertebrae. Data obtained were subjected to descriptive statistics, Pearson’s correlation, bivariate regression equation, student t-test and Analysis of variance (ANOVA).   Results:  The mean age for our population was 58.86 years. ANOVA shows significant variation in the average HCD for the various regions: humerus=8.45±2.48, femur=7.09±4.06, tibia=8.70±2.52 and vertebrae=3.69±0.73. There is a strong inverse relationship between age and primary osteons. The total number of osteon fragments increased with age while total number of primary osteons and average HCD decreased with age. The HCA though statistically insignificant, also decreased with age.   Conclusion: Our findings show that three histomorphometric parameters showed significant correlation with age: osteon fragments (OS-f), primary osteons (OS-p) and HCD. The histomorphometric parameters are therefore relevant in age estimation.   Key words: Age estimation, Histomorphometric parameters, Nigerians, Forensics

GAMBARAN BEBAN KERJA MENTAL PADA DOSEN FAKULTAS X UNIVERSITAS X

2019 ◽  
Vol 2 (3) ◽  
Author(s):  
Kartiani Dewi ◽  
Suryani S ◽  
Ahmad Yamin
Keyword(s):  
Community Service ◽  
Mental Workload ◽  
Sampling Technique ◽  
Mean Value ◽  
Descriptive Statistics ◽  
Large Contribution ◽  
Mean Dimension ◽  
The Mean ◽  
Quantitative Descriptive ◽  
University Lecturers

Lecturers are responsible for implementing the three main responsibilities in university (Tridharma Perguruan Tinggi) with 12 credits to 16 credits each semester. However, many lecturers feel that the workload is very excessive. The purpose of this study was to describe the mental workload of lecturers at the Faculty of X Padjadjaran University. The method of this research was quantitative descriptive by using a total sampling technique involving 43 lecturers. Data collection used NASA-TLX instruments. Data were analysed using descriptive statistics. The results of the study showed that overall the mental workload of the Faculty of X Padjadjaran University lecturers was included in the high category both in education and teaching assignments (74.4%), research assignments (76.7%), and community service assignments (74.4%). ) Effort dimensions have the highest mean value that is equal to 51.8, while the dimensions that have the lowest mean are Perfomance dimension, namely 9.4, where the greater the mean dimension shows the large contribution in the mental workload felt by the lecturer. The conclusions, this study show that most lecturers have a high mental workload. It is suggested that the lecturers need to have balance numbers of tasks according to their abilities, balance the time working with recreation, and meet the needs of rest. The results of this study need to be followed up by examining methods or efforts that can reduce the lecturers' mental workload.

Descriptive statistics

2017 ◽  
Author(s):  
Andrew Gelman ◽  
Deborah Nolan
Keyword(s):  
Descriptive Statistics ◽  
Metabolic Rates ◽  
World Record ◽  
Linear Combinations ◽  
Record Times ◽  
Starting Point ◽  
Statistics Course ◽  
Scatter Plots ◽  
Economic Indexes ◽  
The Mean

Descriptive statistics is the typical starting point for a statistics course, and it can be tricky to teach because the material is more difficult than it first appears. The activities in this chapter focus more on the topics of data displays and transformations, rather than the mean, median, and standard deviation, which are covered easily in a textbook and on homework assignments. Specific topics include: distributions and handedness scores; extrapolation of time series and world record times for the mile run; linear combinations and economic indexes; scatter plots and exam scores; and logarithmic transformations and metabolic rates.

scholarly journals Progress Report in Neuroscience and Education: Experiment of Four Neuropedagogical Methods

2021 ◽  
Vol 11 (8) ◽  
pp. 373
Author(s):  
Leila Elouafi ◽  
Lotfi Said ◽  
Mohammed Talbi
Keyword(s):  
Significant Variation ◽  
Progress Report ◽  
The Mean

We endeavor through this work to demonstrate the effects of the introduction of neuroeducation data in schools and their application, via an experiment of neuropedagogical methods, to respond to the hypothesis that the contribution of neuroeducation may be beneficial for learning. During this study we designed four neuropedagogical methods and to measure their effect on the learning of students in the classroom we used an evaluation grid comprising six psychopedagogical parameters. The results show that no statistically significant variation of these psychoeducational parameters is observed between sexes. However, a variation is recorded for the four neuropedagogical methods between the groups in pre-test and post at the levels of the mean scores ranging from 5.15% to 440%.

Mechanical Anisotropy of Individual Osteons in Bone Tissue at High Spatial Resolutions

2009 ◽  
Author(s):  
Davide Carnelli ◽  
Haimin Yao ◽  
Ming Dao ◽  
Pasquale Vena ◽  
Roberto Contro ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cortical Bone ◽  
Mechanical Anisotropy ◽  
Haversian Canal ◽  
Maximum Penetration ◽  
Fundamental Units ◽  
Anisotropy Of Mechanical Properties ◽  
Penetration Depths ◽  
Secondary Osteons ◽  
Mineralized Collagen

Secondary osteons, the fundamental units of cortical bone, consist of cylindrical lamellar composites composed of mineralized collagen fibrils. Due to its lamellar structure, a multiscale knowledge of the mechanical properties of cortical bone is required to understand the biomechanical function of the tissue. In this light, nanoindentation tests were performed along the axial and transverse directions following a radial path from the Haversian canal to the osteonal edges. Different length scales are explored by means of indentations at different maximum penetration depths. Indentation moduli and hardness data were then interpreted in the context of the known microstructure. Results suggest that secondary osteons hierarchical structure is responsible for an observed length scale effect, homogenization phenomena and anisotropy of mechanical properties.

Regional variations in calculated diastolic wall stress in rat left ventricle

1978 ◽  
Vol 235 (2) ◽  
pp. H247-H250 ◽  
Author(s):  
L. Role ◽  
D. Bogen ◽  
T. A. McMahon ◽  
W. H. Abelmann
Keyword(s):  
Heart Disease ◽  
Left Ventricle ◽  
Significant Variation ◽  
Diastolic Pressure ◽  
Wall Stress ◽  
Free Wall ◽  
Predisposing Factor ◽  
Rat Hearts ◽  
The Mean ◽  
Apical Aneurysm

Principal radii of curvature and wall thickness were measured at the apex and three other loci on the free wall of the left ventricle in 16 rat hearts that had been fixed at end-diastolic pressure. The law of Laplace was applied to calculate the mean tensile stress at each locus. No significant variation was found among the nonapical loci, but apical stress was approximately twice the stress calculated for any nonapical locus. The higher stresses that must be borne by the apex may be a predisposing factor for apical aneurysm in certain cardiomyopathies such as Chagas' disease. These higher stresses may also help to promote apical aneurysms in patients with ischemic heart disease.

Correlates of Ageism Among Health Care Professionals Working With Older Adults

2018 ◽  
Vol 30 (3) ◽  
pp. 303-312 ◽  
Author(s):  
Ziyafet Uğurlu ◽  
Sultan Kav ◽  
Azize Karahan ◽  
Ebru Akgün Çıtak
Keyword(s):  
Older Adults ◽  
Health Care ◽  
Data Analysis ◽  
Health Care Professionals ◽  
Educational Status ◽  
Descriptive Study ◽  
Descriptive Statistics ◽  
The Mean ◽  
Student’S T ◽  
Student’S T Test

Introduction: The changing proportion of older adults in society necessitates the need to determine the attitudes of health care professionals toward older adults. The purpose of this study was to explore attitudes of ageism and its correlates among health care professionals working with older adults. Method: This descriptive study was conducted in seven hospitals in five cities in Turkey. A total of 628 health care professionals participated in this study. The Fraboni Scale of Ageism (FSA) was used to collect data. Descriptive statistics, student’s t test, one-way analysis of variance and multivariate linear regression were used for data analysis. Results: The mean total score from the FSA was 56.9 ( SD = 8.0). Education (β = −.18, p < .001) and difficulty with the care of older adults (β = −.10, p < .05) were statistically significant predictors of the FSA score. Conclusions: The attitudes of health care professionals toward older adults were generally positive and affected by difficulty in providing care and the educational status of the health care professionals.

scholarly journals Teaching Wh-Question To Young Learners Through Picture For Sekami Of Paroki Roh Kudus Tomohon

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
J Tuilan
Keyword(s):  
Experimental Design ◽  
Descriptive Statistics ◽  
Objective Test ◽  
Young Learners ◽  
Post Test ◽  
The Subject ◽  
The Mean

This study intends to find out the effectiveness of using picture as teaching media in teaching WH-Question. The Subject consisted of 10 young aged students attending SEKAMI during the period November 2018 – February 2019. The data were collected through objective test pre-experimental design of one group pre-test post-test. The data were analyzed based on descriptive statistics, in which the mean of pre-test was compared to the mean of post-test. The finding shows that students improved their achievement after being treated with picture. The mean of post-test is higher than the mean of pre-test (X2 is higher than that of X1 = 82.5 > 61.5). This indicates that the use of picture as a teaching media was interesting and made the students easy to understand the situation that had been explained to them. Keywords: WH-Question, Young learners, teaching through picture.

scholarly journals Strengths among Contemporary Teenagers: A Comparative Study

2017 ◽  
Vol 4 (2) ◽  
Author(s):  
Ritu Rani ◽  
Punam Midha ◽  
Ankita Budhiraja
Keyword(s):  
Harmonious Society ◽  
Descriptive Statistics ◽  
Female Adolescents ◽  
Male And Female ◽  
Signature Strengths ◽  
Fast Speed ◽  
The Mean ◽  
Mean Differences ◽  
Age Range ◽  
Purposive Sample

Male and female are two indispensible wheels of a chariot, thus both complement each other and this is a fact that without any one of them, it is just impossible to imagine the smooth continuation of the journey of life. India is a country where women were worshiped as Goddess. Though the society in which we live has been shaped historically by males. But recently the existing scenario appears to be changing with the realization of strengths among females. A harmonious society appears to be emerging with the fast speed of decline in gender-specificity. In order to empirically confirm these notions, the present researchers decided to explore and compare the profile of strengths of male-female adolescents. A test of Hindi adaptation of Value In Action (VIA) Inventory of Strengths for Youth by Shree and Singh (2013) was used. A purposive sample of 150 adolescents in which 75 were males and 75 were females with the age range of 13-17 years was drawn from Rohtak city, Haryana. The descriptive statistics was used to find out the mean differences in strengths of male and female adolescents. They differed to some extent in their profile of signature strengths. Further the profile of top five strengths also called “signature strengths”, the male and female differed in two out of five signature strengths. The similar signature strengths found in both male and female adolescents were such as judgment/critical thinking, appreciation of beauty and love, however they differed on two strengths such as zest and perspective were found in male while kindness and modesty were found in female. The inference drawn from the current study is that females are more humane than the male counterpart whereas males are found to be more courageous than females. The need to foster or enhance certain strengths in specific gender are discussed in the paper.

scholarly journals Genetic variability of popping quality traits and microsatellite-based characterization of popcorn inbreds for utilization in breeding programme

2020 ◽  
Vol 80 (02) ◽  
Author(s):  
Deepa Pal ◽  
Vignesh Muthusamy ◽  
Rajkumar U. Zunjare ◽  
Sunil K. Jaiswal ◽  
Rashmi Chhabra ◽  
...  
Keyword(s):  
Significant Variation ◽  
Principal Coordinate Analysis ◽  
Hybrid Breeding ◽  
Effective Utilization ◽  
Dissimilarity Coefficients ◽  
Check Variety ◽  
The Mean ◽  
Positive Correlations ◽  
Mapping Populations

Popcorn is a popular snack item worldwide. The genetic base of popcorn germplasm is quite narrow, which resulted in limited number of popcorn hybrids. Here, a set of sub-tropically adapted 39 popcorn inbreds of exotic- and indigenous-origin, were characterized using morphological traits and molecular markers for their effective utilization in hybrid breeding. Significant variation for grain popping percentage (GPP: 86.0-98.0%), percent popping expansion (PPE: 1493-3213%) and volume after popping (VAP: 210-315ml) was observed. The mean PPE (2069%) and GPP (93.6%) among popcorn inbreds were higher than the popcorn check variety, VL popcorn (PPE: 1739%, GPP: 92%). Positive correlations were observed among GPP, PPE and VAP. Molecular characterization using 72 SSRs produced 237 alleles with a mean of 3.3 alleles per locus. Polymorphism information content ranged from 0.05 to 0.68, while Jaccard’s dissimilarity coefficients varied from 0.27-0.82. Principal coordinate analysis also depicted diverse genetic nature of inbreds. Cluster analysis grouped the inbreds into three major clusters each having 16, 18 and 5 inbreds. Contrasting inbreds were identified for development of mapping populations to identify loci governing desirable popping quality. The study also identified potential heterotic combinations. The information generated here assumes great significance in breeding for popcorn hybrids.

scholarly journals AUDIT OF EVOLVING ROLES OF LAPAROSCOPY IN THE CURRENT SURGICAL PRACTICE AT CHRIS HANI BARAGWANATH ACADEMIC HOSPITAL: A 5 YEAR REVIEW

2021 ◽  
Vol 8 (5) ◽  
pp. 16-24
Keyword(s):  
Laparoscopic Cholecystectomy ◽  
Laparoscopic Surgery ◽  
Standard Of Care ◽  
Descriptive Statistics ◽  
Academic Hospital ◽  
Surgical Practice ◽  
The Past ◽  
Wide Range ◽  
Accepted Standard ◽  
The Mean

Background: Laparoscopic surgery (LS) is gaining momentum and has revolutionised the practice of surgery. Over the past thirty years, LS has been used to manage a wide range of surgical pathologies and has become a recognised and generally accepted standard of care. Aim: The aim of this study is to describe the evolution of LS in selected procedures.. Methods: Data were collected from theatre registries. Statistical analysis was performed using the software IMB SPSS. The data were analysed using descriptive statistics of mean and standard deviation for age, and percentage and frequencies for categories of variables . Results: Of the 3745 patients involved in the study, 59.1% were males and 40.9% were females. The mean age of the patients was 35.17±17.30 years. Laparoscopic surgery was represented in 43.2% of the procedures, with laparoscopic appendicectomy (46.73%) and laparoscopic cholecystectomy (32.69%) being the most commonly performed procedures.. Twenty-five adrenalectomies were performed over the study period, and of those 12 (52%) were performed laparoscopically. All the thymectomies (12) were performed thoracoscopically, with one conversion. Conclusion: The findings of this study suggest that there has been an increase in the overall incidence of laparoscopic surgery in selected procedures at CHBAH.

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