SEX DETERMINATION FROM HIP BONE FRAGMENT IN DHANBAD, JHARKHAND

2021 ◽  
pp. 15-17
Author(s):  
Santosh Kumar ◽  
Makardhwaj Prasad
Keyword(s):  
Discriminant Function ◽  
Gender Discrimination ◽  
Function Analysis ◽  
Maximum Diameter ◽  
Bone Fragment ◽  
Discriminant Functions ◽  
Maximum Width ◽  
Obturator Foramen ◽  
Metric Analysis ◽  
Study Participants

The current study used discriminant function analysis to derive a model for determining sex from an adult hip bone fragment (distal ischio-pubic portion). The discriminant function obtained was DF = .76*SYL +1.60*SYW + 4.36. *DOF – 24.88. The three predictors [maximum vertical length of symphyseal surface (SYL), maximum width of symphyseal surface of pubis (SYW), and maximum diameter of the obturator foramen (DOF)] accurately categorised 90.0 % of the cases. Cross-validated ndings revealed 86.7% accurate categorization. This preliminary research's ndings indicate that these three factors lead to gender discrimination in the study participants. Again, discriminant functions are population specic. Using the discriminant function on a sample from the population of Dhanbad, Jharkhand, the hipbone may be sexed quite accurately. This metric analysis may be utilised for the population's hipbone fragments.

Niche separation in coprophagous beetles: a comparison of two multivariate approaches

1997 ◽  
Vol 87 (6) ◽  
pp. 625-631 ◽  
Author(s):  
P. Sowig
Keyword(s):  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Function Analysis ◽  
Niche Overlap ◽  
Niche Separation ◽  
Discriminant Functions ◽  
Niche Space ◽  
Advantages And Disadvantages ◽  
Southwest Germany ◽  
Discriminant Function Analyses

AbstractCoprophagous beetles (endocoprid and paracoprid Scarabaeidae, Hydrophilidae, and Staphylinidae) were extracted from 698 sheep droppings from a pasture in southwest Germany. To quantify the pairwise niche overlap of these species, pairwise discriminant function analysis was used to calculate the overlap of the discriminant distributions in a four-dimensional niche space. Niche separation was studied considering the following four factors: season (month) and macrohabitat when and where the dropping was deposited, dropping size, and water content of the dropping. Multiple discriminant function analysis was used to describe the distribution of species in a space defined by four discriminant functions. The first discriminant function was mostly influenced by the factor ‘season’. The importance of different factors for niche separation in different functional groupings of dung beetles is compared with results from the literature. Advantages and disadvantages of pairwise and multiple discriminant function analysis, and univariate evaluation methods are compared. The following problems and restrictions of discriminant function analyses are emphasized: (i) the usage of non-numerical variables; (ii) the calculation of niche breadths; (iii) failures, when bimodally distributed variables are considered; and (iv) the ecological interpretation of statistical significances.

A new species of the genus Polyschides Pilsbry & Sharp, 1898 (Mollusca, Scaphopoda, Gadilidae) from Brazilian waters

Zootaxa ◽  
2005 ◽  
Vol 871 (1) ◽  
pp. 1 ◽  
Author(s):  
CARLOS HENRIQUE SOARES CAETANO ◽  
RICARDO SILVA ABSALÃO
Keyword(s):  
New Species ◽  
Geographic Distribution ◽  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Function Analysis ◽  
Diameter Ratio ◽  
Maximum Diameter ◽  
Width Ratio ◽  
Aperture Width ◽  
A New Species

The genus Polyschides is characterized by smallto medium-sized shells with an apex divided into four lobes. We present a revision of the species of Polyschides from Brazil, with the description of a new species. Polyschides tetraschistus (Watson, 1879) and P. portoricensis (Henderson, 1920) were confirmed for Brazilian waters, with the known geographic distribution of the latter extended southward to the state of Rio de Janeiro (21ºS). Comparisons of shell morphometrics show that: (1) P. xavante n. sp. is significantly smaller and less arched than P. tetraschistus and P. portoricensis; (2) the maximum diameter, height and width of the anterior aperture, and the height and width of the apical aperture were also significantly smaller in P. xavante; (3) the maximum diameter in P. xavante n. sp. and P. tetraschistus is located closer to the aperture than in P. portoricensis. A Discriminant Function Analysis based on seven shell morphometric variables (length, maximum diameter, length to maximum diameter ratio, anterior aperture width, anterior aperture height to anterior aperture width ratio, maximum diameter to posterior aperture width and distance of point of maximum curvature from the apex to length ratio) were 100% efficient in discriminating among the three species.

DISCRIMINANT FUNCTION ANALYSIS IN IDENTIFICATION OF PEACH VARIETIES IN NURSERY TREES

1957 ◽  
Vol 37 (1) ◽  
pp. 12-25
Author(s):  
K. LAPINS ◽  
S. W. NASH
Keyword(s):  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Function Analysis ◽  
Two Dimensions ◽  
Variety Identification ◽  
Discriminant Functions ◽  
Leaf Characteristics ◽  
Unknown Sample ◽  
Nursery Trees

Discriminant function analysis was applied to test the possibility of identifying five peach varieties from nursery trees which had been measured for five leaf characteristics. Variation of the five leaf characters was found to be mainly in two dimensions and was expressed by two discriminant functions. The compound scores of two discriminant functions of the varieties could be simply plotted on two axes of a chart. Application of the discriminant functions is simple and consists in comparing the compound scores of an unknown sample to those of the average values of known varieties by plotting them on the chart. Individual 20-leaf samples, when plotted on the chart, were found to scatter rather widely and the points representing related varieties frequently overlapped. However, using variety Valiant as standard and adjusting the variation caused by location effect, variation was reduced to such an extent that application of discriminant functions in peach variety identification could be considered practicable.

Diagnoses Generated by Numerical Taxonomic Methods Applied to Standard Blood Variables

1980 ◽  
Vol 19 (04) ◽  
pp. 205-209
Author(s):  
L. A. Abbott ◽  
J. B. Mitton
Keyword(s):  
Liver Cirrhosis ◽  
Renal Disease ◽  
Principal Components Analysis ◽  
Discriminant Function ◽  
Principal Components ◽  
Discriminant Function Analysis ◽  
Chronic Renal Disease ◽  
Function Analysis ◽  
Infectious Hepatitis ◽  
Components Analysis

Data taken from the blood of 262 patients diagnosed for malabsorption, elective cholecystectomy, acute cholecystitis, infectious hepatitis, liver cirrhosis, or chronic renal disease were analyzed with three numerical taxonomy (NT) methods : cluster analysis, principal components analysis, and discriminant function analysis. Principal components analysis revealed discrete clusters of patients suffering from chronic renal disease, liver cirrhosis, and infectious hepatitis, which could be displayed by NT clustering as well as by plotting, but other disease groups were poorly defined. Sharper resolution of the same disease groups was attained by discriminant function analysis.

scholarly journals Description of Echolocation Call Parameters for Urban Bats in Vietnam as a Step Towards a More Integrated Acoustic Monitoring of Urban Wildlife in Southeast Asia

Diversity ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 18
Author(s):  
Long Kim Pham ◽  
Bang Van Tran ◽  
Quy Tan Le ◽  
Trung Thanh Nguyen ◽  
Christian C. Voigt
Keyword(s):  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Function Analysis ◽  
Quantitative Description ◽  
Southeast Asian ◽  
Asian Countries ◽  
Echolocation Call ◽  
Echolocation Calls ◽  
Pilot Work ◽  
Southeast Asian Countries

This study is the first step towards more systematic monitoring of urban bat fauna in Vietnam and other Southeast Asian countries by collecting bat echolocation call parameters in Ho Chi Minh and Tra Vinh cities. We captured urban bats and then recorded echolocation calls after releasing in a tent. Additional bat’s echolocation calls from the free-flying bats were recorded at the site where we captured bat. We used the obtained echolocation call parameters for a discriminant function analysis to test the accuracy of classifying these species based on their echolocation call parameters. Data from this pilot work revealed a low level of diversity for the studied bat assemblages. Additionally, the discriminant function analysis successfully classified bats to four bat species with an accuracy of >87.4%. On average, species assignments were correct for all calls from Taphozous melanopogon (100% success rate), for 70% of calls from Pipistrellus javanicus, for 80.8% of calls from Myotis hasseltii and 67.3% of calls from Scotophilus kuhlii. Our study comprises the first quantitative description of echolocation call parameters for urban bats of Vietnam. The success in classifying urban bats based on their echolocation call parameters provides a promising baseline for monitoring the effect of urbanization on bat assemblages in Vietnam and potentially also other Southeast Asian countries.

Mineralogy of Egyptian Bentonitic Clays I: Discriminant Function Analysis

2012 ◽  
Vol 60 (4) ◽  
pp. 387-404 ◽  
Author(s):  
Mohamed Agha ◽  
Ray E. Ferrell ◽  
George F. Hart
Keyword(s):  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Function Analysis

Shattering the Glass Podium: Successes and Setbacks of Women in Collegiate Choral Conducting

2021 ◽  
pp. 875512332110183
Author(s):  
Melissa Baughman
Keyword(s):  
Gender Discrimination ◽  
Online Survey ◽  
Response Rate ◽  
The United States ◽  
Choral Conducting ◽  
Demographic Information ◽  
Choral Conductors ◽  
The Status ◽  
Study Participants ◽  
Experiences Of Women

The purpose of this study was to explore the status and experiences of women in collegiate choral conducting positions. Out of all collegiate choral conductors ( N = 992) at institutions accredited by the National Association of Schools of Music in the United States, 68.65% ( n = 681) were men and 31.35% ( n = 311) were women at the time of this study; I invited the women collegiate choral conductors to serve as study participants. Ninety-six respondents completed an online survey, resulting in a response rate of 30.86%. I collected data through a researcher-designed survey. First, I asked respondents to provide demographic information and respond to Likert-type and open-ended prompts related to three domains: gaining entry into the profession, navigating the profession, and issues surrounding gender. I analyzed data through descriptive statistics and qualitative methods of assigning codes, combining codes into themes, and displaying the data. I addressed general discrepancies in the self-reported attitudes of respondents. Although women reported an overall attitude of satisfaction as choral conductors in their Likert-type responses, many respondents detailed several instances of gender discrimination and other challenges in their open-ended responses. Implications for the music profession, including specific strategies to help empower women in collegiate choral conducting settings, are discussed.

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