Predicting the Scale of Tennis Rackets for Optimal Striking from Body Dimensions

2005 ◽  
Vol 17 (2) ◽  
pp. 190-200 ◽  
Author(s):  
Linda M. Gagen ◽  
Kathleen M. Haywood ◽  
Steven D. Spaner
Keyword(s):  
Body Size ◽  
Significant Relationship ◽  
Body Dimensions ◽  
Environmental Objects ◽  
And Control ◽  
Speed And Accuracy ◽  
Significant Factors

This study tested the hypothesis that scaling environmental objects can afford differently sized individuals the opportunity to make similarly effective movements with that object. Four similar tennis rackets were scaled to provide consistent differences in length, weight, and grip size. Children between 4 and 10 years of age were asked to strike with each racket for speed and accuracy. A significant relationship existed between body size and strength and the ability to both generate racket head speed and control the racket for an accurate strike; racket size and weight, however, were not significant factors in the ability to swing effectively.

The Effect of Group Counseling on Educable Mentally Retarded Boys’ Self Concepts

1969 ◽  
Vol 35 (5) ◽  
pp. 359-366 ◽  
Author(s):  
Philip H. Mann ◽  
James D. Beaber ◽  
Milton D. Jacobson
Keyword(s):  
Group Counseling ◽  
Mentally Retarded ◽  
The Self ◽  
Self Concept ◽  
Control Groups ◽  
Mentally Handicapped ◽  
Significant Difference ◽  
Educable Mentally Retarded ◽  
And Control ◽  
Significant Factors

The effects of group counseling on the self concepts of young educable mentally handicapped boys were studied, along with the variables of anxiety, deportment and achievement in reading and arithmetic as rated by teachers, attendance, IQ, and age. Results indicated that those who received group counseling tended to exhibit greater improvement in self concept, more reduction in anxiety, and better grades in deportment and the academic subjects of reading and arithmetic, than those who did not receive the counseling. No significant difference was found between experimental and control groups in attendance. Age and IQ were not found to be significant factors in the counseled group.

Correlations between Speakers' Body Size and Acoustic Parameters of Voice

2007 ◽  
Vol 105 (1) ◽  
pp. 215-220 ◽  
Author(s):  
Julio Conzález
Keyword(s):  
Body Size ◽  
Significant Relationship ◽  
The Body ◽  
Age Group ◽  
Acoustic Parameters ◽  
Acoustic Measures ◽  
Age And Sex

Generally, there is a significant relationship between some acoustic measures (F0 and formant parameters) and the body size of speakers; however, data become less clear when age and sex variables are controlled. To date, no other vocal parameter apart from F0 has been studied in relation to body size. In the present study, correlations between a set of 27 parameters of the Multi-dimensional Voice Program (Kay Elemetrics Corp.) and 4 body measures were obtained from 134 speakers of both sexes belonging to one age group (20–29 years). Correlations within sex groups were null or very weak, and all significant coefficients were below .35.

Boards of Governors' Roles and Management of Government Aided Secondary Schools in Kyenjojo District, Uganda

2018 ◽  
Vol 1 (2) ◽  
pp. 138-150
Author(s):  
Hellen Kabasinguzi Wataba ◽  
Nafiu Lukman Abiodun
Keyword(s):  
Secondary Schools ◽  
Significant Relationship ◽  
Quantitative Data ◽  
Qualitative Data ◽  
Head Teachers ◽  
Correlational Research ◽  
Interview Guide ◽  
Major Predictor ◽  
And Control ◽  
The Relationship

This study sought to establish the relationship between boards of governors' (BOGs) roles and management of government aided secondary schools in Kyenjojo District. The objectives were to establish the relationship between BOGs' planning role and management of government aided secondary schools, to establish the relationship between BOGs' supervisory role and management of government aided secondary schools, to establish the relationship between BOGs' control role and management of government aided secondary schools; and to determine the major predictor of management of government aided secondary schools out of the three aspects of BOGs' roles. A correlational research design was used. A total of 90 respondents drawn from 108 BOGs and nine head teachers were selected as sample for the study using stratified random sampling and census inquiry respectively. The instruments used were questionnaire and interview guide. Quantitative data was analysed using Pearson product-moment correlation and regression, while thematic analysis was used on qualitative data. The study found a statistically moderate positive and significant relationship between BOGs' planning role and management of government aided secondary schools (r=.626, p=.000); a statistically moderate positive and significant relationship between BOGs' supervisory role and management of government aided secondary schools(r=.591, p=.000); and a statistically weak positive and significant relationship between BOGs' control role and management of government aided secondary schools(r=.280, p=.015). All the three aspects of BOGs roles account for 38.4% of the influence on management of government aided secondary schools in Kyenjojo district (adjusted r2=0.384, p=.000). The researchers recommend that BOGs should be well trained in management of schools in order to be effective in their work. Head teachers should not be dictators but create a conducive climate for planning, supervision and control by the BOGs.

scholarly journals Catching the thief: Nectar robbing behaviour by bumblebees on naturalised Fuchsia magellanica in Ireland

2021 ◽  
Vol 29 ◽  
pp. 240-248
Author(s):  
Dara Anne Stanley ◽  
Emmeline Cosnett
Keyword(s):  
Body Size ◽  
Significant Relationship ◽  
Flower Size ◽  
Nectar Robbing ◽  
Native Range ◽  
Alien Plant ◽  
Pollination System ◽  
Flower Visitor ◽  
Bumblebee Species ◽  
Competition For Resources

Fuchsia magellanica (Ongaraceae) is a plant with a traditionally ornithopholous pollination system, pollinated primarily by hummingbirds in its native range. As a naturalised alien plant in Ireland, F. magellanica is visited largely by bumblebees, with evidence for nectar robbing behaviour of the long-tubed flowers. We aimed to investigate nectar robbing behaviour of bumblebees on F. magellanica, and in particular whether floral and pollinator traits (size) determined likelihood of nectar robbing. While F. magellanica was visited by a number of bumblebee species, only two with shorter tongue lengths were observed to rob nectar from flowers. Although there was no observed relationship between intra-specific bee body size and nectar robbing behaviour, nectar robbing was observed most frequently in the site with the highest number of bees. Proportions of robbed flowers were low overall and varied between populations, but there was a significant relationship between flower size and whether it was nectar robbed with larger flowers robbed more often. Our work suggests that floral size determines whether a flower-visitor will choose to nectar rob or not in this system. Nectar robbing may also be related to bee density which could suggest this behaviour is driven by competition for resources, or that it is learnt by observing other bees.

scholarly journals Mingle Model for Increasing Productive Language Skills and Relationship with Student’s Personality Based on Jung Theory

2021 ◽  
Vol 5 (1) ◽  
pp. 35-51
Author(s):  
Suci Ramadhanti Febriani ◽  
Wildana Wargadinata ◽  
Syuhadak Syuhadak
Keyword(s):  
Data Collection ◽  
Research Methods ◽  
Significant Relationship ◽  
Language Skills ◽  
Correlation Method ◽  
Quantitative Approach ◽  
Control Group ◽  
Carl Gustav Jung ◽  
And Control ◽  
The Relationship

This study aims to find the effect of the implemetation of the Mingle Model on productive language skills and the relationship to the personality based on Carl Gustav Jung Theory in Arabic learning at MTsN Batu City, East Java. This research used a quantitative approach by combining the experimental and correlation methods, it was applying the Mingle Model to improve students' productive skills (speaking and writing) which have been divided into two groups; the Experiment and Control group and connected using the correlation method to extroverted and introverted students based on the theory of Carl Gustav Jung. Data collection through questionnaires, tests, and documentation. The results showed that there was a significant relationship to students' productive skills after applying the Mingle Model and there were no significant differences between extroverted and introverted students. This research recommend that the Mingle Model can be applied to improve students' productive skills. This study recommends further research to utilise more varied research methods with more diverse variables.

Male-Female Differences in Variables Affecting Performance

1978 ◽  
Vol 22 (1) ◽  
pp. 416-420 ◽  
Author(s):  
Connie Grasley ◽  
M. M. Ayoub ◽  
Nancy J. Bethea
Keyword(s):  
Sex Differences ◽  
Cold Stress ◽  
Body Dimensions ◽  
Performance Levels ◽  
Physiological Variables ◽  
Performance Matrix ◽  
Males And Females ◽  
Physiological Differences ◽  
And Control ◽  
Sensory Process

Literature concerning variables affecting performance levels of males and females was reviewed. Emphasis was placed on literature using both males and females as subjects in the areas of anthropometric, biomechanical, and physiological variables. When literature using both sexes as subjects was not available, comparable studies were considered for possible use. The results of this review indicate that there are sex differences in anthropometry with regard to body dimensions. In biomechanics, sex differences were noted in reach envelopes strength and flexibility in particular. Physiological differences were noted in responses to heat/cold stress and altitude. These differences were then applied to a performance matrix under the categories of sensory, process and control. Differences noted were either very specific or did not exist at all. This is due in part to a lack of research involving variables as they actually affect performance levels between males and females.

The effect of body size and body condition on the ovulation rate of ewes

1977 ◽  
Vol 24 (3) ◽  
pp. 377-385 ◽  
Author(s):  
M. J. Ducker ◽  
J. S. Boyd
Keyword(s):  
Body Size ◽  
Breeding Season ◽  
Body Condition ◽  
Live Weight ◽  
Ovulation Rate ◽  
Subjective Measure ◽  
Body Dimensions ◽  
The Mean ◽  
Per Se ◽  
Linear Body

SUMMARYBody size was estimated for 255 Greyface ewes using five linear body dimensions. On the basis of this calculated measure combined with a subjective measure of body size 50 small and 50 large ewes were selected for use in the experiment. Precise ovulation data were obtained by endoscopy and this technique allowed the ewes to be mated subsequently.Body size did not affect the mean ovulation rate of the ewes although, at the same level of body condition, the large ewes were 25% heavier than the small ewes. The ovulation rates and the numbers of lambs born were influenced by changes in live weight and body condition. For these reasons live weight per se was not a good indicator of ovulation rate as ewe live weight was a combination of both body size and body condition. At the same live weight small ewes in improving body condition had a significantly higher ovulation rate than large ewes in reducing body condition.The onset of the breeding season of the ewes was not affected by their body size. The mean date of onset of oestrous activity for both large and small ewes was 17 October 1972 at a latitude 55° 52′ N.

THE WING LENGTH OF SWELTSA REVELSTOKA (PLECOPTERA: CHLOROPERLIDAE)

1985 ◽  
Vol 117 (2) ◽  
pp. 233-239 ◽  
Author(s):  
D.B. Donald
Keyword(s):  
Body Size ◽  
Significant Relationship ◽  
Positive Relationship ◽  
Wing Length ◽  
Negative Relationship ◽  
Head Capsule ◽  
High Elevation ◽  
Glacial Ice ◽  
Significant Negative Relationship ◽  
Stream Size

AbstractFunctional wing length (wing length/head-capsule width) of female Sweltsa revelstoka (Jewett) from streams was measured for 19 sites that have been free of Wisconsin glacial ice for about 15 000 years and possibly longer, and from 23 sites that have been ice free for about 10 000 years. At the former sites brachypterous populations were common and there was a significant negative relationship between functional wing length and elevation, and a positive relationship between functional wing length and stream size. In the area that deglaciated more recently, populations were not or only slightly brachypterous and there was no significant relationship between wing length and elevation or between wing length and stream size. Functional wing length was not related to body size. These analyses indicate that the brachypterous condition is probably genotypic in origin. I suggest that streams were colonized by macropterous forms shortly after deglaciation, and that brachyptery takes several millennia to develop at small, high-elevation streams.

Ontogenetic color change in the crayfish Cambarus b. bartonii and Faxonius obscurus: a test of Ortmann’s hypotheses

2017 ◽  
Vol 23 (1) ◽  
pp. 59-63
Author(s):  
Sean M. Hartzell
Keyword(s):  
Image Analysis ◽  
Genetic Variation ◽  
Body Size ◽  
Digital Image ◽  
Significant Relationship ◽  
Digital Image Analysis ◽  
Color Change ◽  
Ontogenetic Shift ◽  
Eastern Pennsylvania ◽  
Crayfish Species

Abstract In crayfish, intraspecific coloration can vary due to a variety of factors such as diet, genetic variation, environment, and ontogeny. Ortmann (1906) hypothesized that the crayfish Cambarus bartonii bartonii and Faxonius obscurus exhibit an ontogenetic shift in color change, with greener coloration in younger individuals of both species diminishing with age in larger specimens. However, this hypothesis has never been quantitatively tested. This work incorporated digital image analysis to quantify coloration of samples of C. b. bartonii and F. obscurus collected from two locations, respectively, in an eastern Pennsylvania stream. Examination for relationships between coloration (percent “green dominance”, i.e., the proportion of green in comparison to blue and red in photographs) and body size did not reveal any significant relationship between these variables in either crayfish species. Therefore, this study does not support the presence of ontogenetic color change in C. b. bartonii and F. obscurus, and suggests intraspecific variation of color in both species may be primarily influenced by other factors.

The Effects of Instruction on Length Relations on the Classification, Seriation, and Transitivity Performances of First- and Second-Grade Children

1974 ◽  
Vol 5 (3) ◽  
pp. 115-125
Author(s):  
Martin L. Johnson
Keyword(s):  
Elementary Schools ◽  
Significant Relationship ◽  
School Effects ◽  
Second Grade ◽  
Control Groups ◽  
School Effect ◽  
And Control ◽  
Main Effects

A sample of 81 first- and second-grade children from 2 Atlanta elementary schools was randomly partitioned into experimental and control groups. The experimental children were given experiences in sorting and seriating linear objects. The main effects of treatment and grade were significant (p < .01) on a seriation test. Grade and school effects were significant (p < .05) on a conservation test, with only school effect significant (p < .05) on a transitivity test. No significant relationship could be detected between classification and transitive ability using “same length as”; or between seriation and transitive ability using “shorter than” and “longer than.”

Sign in / Sign up

Export Citation Format

Share Document