A photographic method for lobster morphometry aimed at site discrimination

2013 ◽  
Vol 70 (11) ◽  
pp. 1658-1665 ◽  
Author(s):  
Nathan Rycroft ◽  
Kristin Radcliffe ◽  
Jelle Atema
Keyword(s):  
Discriminant Analysis ◽  
Homarus Americanus ◽  
Current Data ◽  
Statistical Analyses ◽  
Photographic Method ◽  
Fixed Position ◽  
Measuring Process ◽  
Permanent Record ◽  
Males And Females ◽  
Site Discrimination

Current data suggest that lobster (Homarus americanus) populations are less homogenous than once believed. In an effort to better discriminate morphologically among lobsters from different sites, we developed a photographic method using ImageJ and compared it with commonly used “hand” measurements. We standardized the measuring process using a strap-down board for both dorsal and ventral photographs with a camera mounted at a fixed position above the lobster. Discriminant analysis showed that both hand and photographic methods were useful in discriminating lobsters — both males and females — from three different sites. Additionally, the photographic method improved reproducibility and resolution, it reduced measurement time at the dock, and it created a permanent record for later verification, additional statistical analyses, and observer training.

Multivariate consumption profiling (MCP) for intelligent meter systems: a methodology to define categories and levels

2010 ◽  
Vol 10 (5) ◽  
pp. 710-720 ◽  
Author(s):  
J. L. Solanas ◽  
M. R. Cussó
Keyword(s):  
Cluster Analysis ◽  
Factor Analysis ◽  
Multivariate Analysis ◽  
Discriminant Analysis ◽  
Reference Population ◽  
Statistical Analyses ◽  
Conceptual Schema ◽  
Data Variability ◽  
Water Companies ◽  
Analyse Data

Multivariate Consumption Profiling (MCP) is a methodology to analyse the readings made by Intelligent Meter (IM) systems. Even in advanced water companies with well supported IM, full statistical analyses are not performed, since no efficient methods are available to deal with all the data items. Multivariate Analysis has been proposed as a convenient way to synthesise all IM information. MCP uses Factor Analysis, Cluster Analysis and Discriminant Analysis to analyse data variability by categories and levels, in a cyclical improvement process. MCP obtains a conceptual schema of a reference population on a set of classifying tables, one for each category. These tables are quantitative concepts to evaluate consumption, meter sizing, leakage and undermetering for populations and groupings and individual cases. They give structuring items to enhance “traditional” statistics. All the relevant data from each new meter reading can be matched to the classifying tables. A set of indexes is computed and thresholds are used to select those cases with the desired profiles. The paper gives an example of a MCP conceptual schema for five categories, three variables, and five levels, and obtains its classifying tables. It shows the use of case profiles to implement actions in accordance with the operative objectives.

Abstract P051: Inflammation is Significantly Associated With High Blood Pressure in Females Only

Circulation ◽  
2012 ◽  
Vol 125 (suppl_10) ◽  
Author(s):  
Jenny Eckner ◽  
Charlotte A Larsson ◽  
Lennart Rastam ◽  
Ulf Lindblad
Keyword(s):  
Insulin Resistance ◽  
Blood Pressure ◽  
Body Weight ◽  
Linear Regression ◽  
High Blood Pressure ◽  
Statistical Analyses ◽  
Interaction Terms ◽  
Relative Body Weight ◽  
Males And Females ◽  
Hs Crp

INTRODUCTION The causes of high blood pressure are complex and based on an interaction between multiple biological factors and behaviours. Insulin resistance and inflammation are commonly acknowledged mechanisms in the development of CVD, while insulin resistance and relative body weight correspondingly predict the development of high blood pressure. HYPOTHESIS We aimed to compare insulin resistance, relative body weight, and inflammation in the association with SBP. METHODS In 2001-2005 a random sample of residents aged 30-74 years in the municipalities of Vara and Skövde, South-western Sweden, were invited to a survey of cardiovascular risk factors. In all 1811 participants in Vara (participation rate 81%) and 1005 participants in Skövde (70%) were enrolled. Subjects with a known history of hypertension were excluded for the current study. Specially trained nurses saw all subjects in the morning after a 10 hours over night fast, and venous blood samples were taken. A physical examination included body height and body weight (light cloths and no shoes), blood pressure was measured twice in a supine position after a 5 minutes rest (arm in heart level). The mean of the 2 measurements was used for statistical analyses. Hs-CRP and plasma insulin were analysed, and BMI and HOMA-index were calculated using standard algorithms. The log form of HOMA-ir was used in statistical analyses. Associations were explored in males and females separately using multivariate linear regression. RESULTS In all 2538 subjects, 1266 men (50%) and 1272 women (50%) without known hypertension were included. BMI and HOMA-ir were both significantly associated with SBP in both males and females, while hs-CRP was associated with SBP in women only. These factors were accordingly entered into a multivariate linear regression model also including age. In men HOMA-ir [regression coefficient, (95% confidence interval), and p-value] [5.4 (2.5-8.4), p<0.001], was significantly associated with SBP, while BMI [0.2 (-0.3-0.5), p=0.087], and CRP was not [0.02 (-0.1-0.1), p=0.138]. In women all three mechanisms came out significantly; HOMA-ir [5.4 (2.2-8.6), p<0.001], BMI [0.4 (0.2-0.5), p<0.001], and CRP [0.2 (0.02-0.4), p=0.031]. There were statistically significant interaction terms between gender and CRP (p=0.037), and gender and HOMA-ir (P=0.045), respectively, while no corresponding interaction was found for BMI. CONCLUSIONS Our study confirms a strong impact of insulin resistance and relative body weight on blood pressure levels in both men and women. However, a significant association between hs-CRP and systolic blood pressure in women was not seen in men. Gender differences in insulin resistance and inflammation were statistically confirmed by interaction terms. These findings have implications for future research and for development of clinical practice.

Sex Differences in Assertive Behavior: A Research Extension

1982 ◽  
Vol 51 (3) ◽  
pp. 943-948 ◽  
Author(s):  
David L. Mathison ◽  
Raymond K. Tucker
Keyword(s):  
Sex Differences ◽  
Discriminant Analysis ◽  
Empirical Research ◽  
Behavior Therapy ◽  
High Status ◽  
Significant Tendency ◽  
Assertive Behavior ◽  
Males And Females

This study was an extension of earlier empirical research measuring sex differences in assertive behavior. The Rathus Assertiveness Schedule was used for measuring assertiveness and discriminant analysis was employed to differentiate maximally responses of males and females. 140 men and 195 women were tested. There were four significant findings. Men reported a significant tendency to assert themselves more than women in public situations while women reported a tendency to be more assertive in private interpersonal settings. Men reported a significantly greater tendency than women to be shy in dating situations. Finally, men reported a greater willingness than women to question publicly a person of high status. The implications of these results were discussed both in terms of earlier research and as they apply to behavior therapy.

scholarly journals The Identification Model on Swimming Athletes Skill

2020 ◽  
Vol 3 (2) ◽  
pp. 91-101
Author(s):  
Fahrur Rozi ◽  
Hari Setijono ◽  
Nining Widyah Kusnanik
Keyword(s):  
Discriminant Analysis ◽  
Sampling Technique ◽  
Equation Model ◽  
Development Model ◽  
Period 2 ◽  
Males And Females ◽  
Spss Software ◽  
Quota Sampling ◽  
Identification Model ◽  
Model Approach

This research is aimed to produce instrumental test as well as anthropometric, biometric measurement and swimming skill with equation model and software. The instrument is used to identify the skill of swimming athletes. The kind of research used is quantitative with development model approach. The sample is taken using quota sampling technique involving 60 people (30 males and 30 females) for the first testing, and 120 people (60 males and 60 females) for second testing. Thus, the total samples include 180 people. The data is analyzed using factor and discriminant analysis with the help of the SPSS software. The result in the period-1 shows that there are 16-item instrumental tests for male and female. The result for period-2 is using factor analysis with the amount 0.60 and contained 16 instrumental items for male and 14 instrumental tests for female participants. The result for period-3 using factor and discriminant analysis is obtained 12 instrumental tests for both males and females. The software that is obtained is FASTI (Fahrur Rozi Swimming Talent Identification).

Antecedents of Change in Attitudes of Males and Females

1977 ◽  
Vol 41 (3) ◽  
pp. 811-821 ◽  
Author(s):  
Timothy G. Plax ◽  
Lawrence B. Rosenfeld
Keyword(s):  
Discriminant Analysis ◽  
Attitudinal Change ◽  
Multiple Discriminant Analysis ◽  
Personality Tests ◽  
Personality Variables ◽  
Males And Females ◽  
Attitudinal Changes

To isolate personality variables descriptive of attitudinal changes for males and females, subjects (82 males, 74 females) completed a variety of nonprojective personality tests, received a counterattitudinal message, and indicated pre- and posttest attitudes toward the message topic. The results of a stepwise multiple discriminant analysis indicated differences which are descriptive of males and females exhibiting different amounts of attitudinal change. Females exhibiting high attitudinal change were characterized as obliging and changeable, while high changing males were ordered, dependent and unstable; females exhibiting low attitudinal change were characterized as aggressive and unchanging, while males with low attitudinal change were forceful, efficient, and well-informed.

scholarly journals Mass of agricultural tractors available in the brazilian market

2016 ◽  
Vol 46 (8) ◽  
pp. 1390-1394 ◽  
Author(s):  
Javier Solis Estrada ◽  
José Fernando Schlosser ◽  
Marcelo Silveira de Farias ◽  
Alfran Tellechea Martini ◽  
Gustavo Oliveira dos Santos
Keyword(s):  
Class Ii ◽  
Current Data ◽  
Power Relation ◽  
Statistical Analyses ◽  
Class I ◽  
Class Iii ◽  
Agricultural Operations ◽  
Agricultural Tractors ◽  
Engine Power

ABSTRACT: Currently, manufacturers of agricultural tractors offer to farmers a diversity of brands, models, and settings for the most diverse agricultural operations. In this sense, the relation mass/power of tractor influences directly in the performance of these operations. The objective of this research was to study the agricultural wheel tractors marketed in Brazil in relation to their mass, in order to obtain current data to help their selection and proper use. The research involved 145 agricultural tractors models of eight different brands, including 2WD, MFWD and 4WD versions. The variables mass without ballast, relation mass/power for the different brands, type of traction and tractor power were analyzed separately. Tractor power was classified in: Class I (<50kW), Class II (50 to 150kW) and Class III (>150kW), according to the rated engine power declared by the manufacturer. Statistical analyses used were the t-Student and Tukey tests. The most number of tractors belongs to Class II and are considered versatile due to their mass/power relation, and can be used in the most diverse agricultural operations. From these analyses it was detected the mass/power relation decreases when the rated engine power increases.

scholarly journals Morphological and Vocal Variation Across a Contact Zone between the Chickadees Parus Atricapillus and P. Carolinensis

The Auk ◽  
1986 ◽  
Vol 103 (4) ◽  
pp. 655-666 ◽  
Author(s):  
Mark B. Robbins ◽  
Michael J. Braun ◽  
Emily A. Tobey
Keyword(s):  
Discriminant Analysis ◽  
Contact Zone ◽  
Assortative Mating ◽  
Great Plains ◽  
Song Type ◽  
Playback Experiments ◽  
Parus Atricapillus ◽  
The North ◽  
Males And Females ◽  
Carolina Chickadees

Abstract A contact zone between Black-capped and Carolina chickadees (Parus atricapillus and P. carolinensis) exists in southwestern Missouri. It was less than 15 km wide and paralleled the interface between the relatively treeless Great Plains and the forested Ozark Plateau. Many birds in this zone were intermediate in morphology or vocalizations or both. Moreover, both morphological and vocal discriminant analysis scores of contact zone birds were unimodally distributed and there was no correlation between morphological discriminant scores of mated males and females in the contact zone, indicating little or no assortative mating. Playback experiments demonstrated that birds to the north or south of the contact zone responded aggressively only to their own song type, while contact zone birds responded to either song type. We believe that southwestern Missouri contact zone populations are derived from extensive hybridization between atricapillus and carolinensis.

Drug Attitude Factors: Comparisons of Samples from 1985 and 1992

1994 ◽  
Vol 24 (3) ◽  
pp. 207-217 ◽  
Author(s):  
Lin S. Myers ◽  
Gary Vankirk ◽  
Thomas A. Gentry ◽  
James A. Wakefield
Keyword(s):  
Factor Analysis ◽  
Discriminant Analysis ◽  
Oral Contraceptives ◽  
Public Policies ◽  
Male And Female ◽  
Chemical Effects ◽  
Two Samples ◽  
Males And Females ◽  
And Gender ◽  
Drug Attitude

The Stanislaus Chemical Effects Survey, which contains the names of twenty-four substances and asks subjects to rate the relative harm and benefit of each to society, was given to male and female undergraduates in 1985 and 1992. Factor analysis of the responses from each sample were done separately and then a comparison was made of the resulting factors. Fifteen of the twenty-four drugs retained their approximate same position in the structure of drug attitudes between the two samples. Attitudes about three substances, tobacco, oral contraceptives, and PCP, notably appeared to have undergone significant shifts. Discriminant analysis revealed significant differences between the two samples, between males and females regardless of year, and an interaction between year and gender. Findings suggest that attitudes remain conservative about drugs in general and that public policies may be contributing to the shifts in attitudes seen.

CONTRASTING CONCURRENT AND CHILDHOOD SOCIOECONOMIC PREDICTORS OF SELF-RATED HEALTH AMONG OLDER EUROPEAN MEN AND WOMEN

2016 ◽  
Vol 49 (4) ◽  
pp. 478-497 ◽  
Author(s):  
Georgia Verropoulou ◽  
Maria Zakynthinou
Keyword(s):  
Regression Models ◽  
Current Data ◽  
Independent Effect ◽  
Relative Importance ◽  
Comprehensive Model ◽  
Men And Women ◽  
Logistic Regression Models ◽  
Self Rated Health ◽  
Males And Females ◽  
Childhood Predictors

SummaryThis study aimed to assess the relative importance of childhood and adulthood socioeconomic position (SEP) on the self-rated health (SRH) of men and women aged 50 or higher in Europe, controlling for a substantial number of mediators and health conditions. Data from Wave 2 (current data) and Wave 3 (retrospective material) of the Survey of Health, Ageing and Retirement in Europe (SHARE) were combined (N=20,829) and logistic regression models applied; the analysis was carried out for males and females separately. The findings indicate that concurrent and past SEP, when considered separately, are both very significant predictors of SRH. When all factors were included in a comprehensive model most childhood and adult SEP variables retained their significance, implying that both types of socioeconomic circumstances have a strong and independent effect on SRH. However, the relative importance of several childhood indicators was reduced, signifying that their effect on SRH is mediated by adult SEP and, especially, educational attainment. Some childhood predictors, such as having experienced a period of hunger, remained very significant. Though these findings roughly hold for both sexes, the relative effects differentiate by sex. Current SEP is more important among women, with the exception of income and ‘making ends meet in the household’. Childhood SEP indicators are more significant among men.

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