A Test of the Relationship between Site Size and Population

1996 ◽  
Vol 61 (3) ◽  
pp. 573-579 ◽  
Author(s):  
Katharina J. Schreiber ◽  
Keith W. Kintigh
Keyword(s):  
Historical Data ◽  
Areal Extent ◽  
Weak Correlation ◽  
Peruvian Andes ◽  
Two Factors ◽  
Site Function ◽  
The Relationship ◽  
Habitation Site

Archaeologists, especially those doing regional surveys, generally assume that there is a correlation between the areal extent of a habitation site and the number of people living at that site. This paper uses a combination of archaeological and historical data from the Peruvian Andes to examine this assumption. We find that, in this case, only a weak correlation holds between these two factors. However, a consideration of site function and topography may render the apparent ambiguities understandable.

A Wider View of the Relationship between Settlement Size and Population in the Peruvian Andes

1997 ◽  
Vol 62 (4) ◽  
pp. 719-722 ◽  
Author(s):  
Kenneth L. Kvamme
Keyword(s):  
Regression Analysis ◽  
Historical Data ◽  
Methodological Approach ◽  
Data Sets ◽  
Power Functions ◽  
Weak Correlation ◽  
Peruvian Andes ◽  
Settlement Size ◽  
The Relationship ◽  
Better Than

Although the relationship between settled area and population size has been well studied in archaeology, anthropology, and geography, with numerous empirical data sets, an established methodological approach, and a body of theory, Schreiber and Kintigh's (1996) analysis of archaeological and historical data from the Peruvian Andes found “only a weak correlation” between these variables. By employing double logarithmic data, the relationship is shown to be much better than the “surprisingly poor” one the raw data suggests. Regression analysis of these Peruvian data in logarithmic form yields power functions that conform closely with expectations derived from a body of settlement size theory based on the allometric principle.

A contingency perspective on learning and instruction in physical education

2021 ◽  
pp. 1356336X2098588
Author(s):  
Jonas Wibowo ◽  
Ben Dyson
Keyword(s):  
Physical Education ◽  
Learning Processes ◽  
Methodological Issues ◽  
Unit Of Analysis ◽  
Contingency Perspective ◽  
Two Factors ◽  
The Individual ◽  
Teaching Learning ◽  
The Relationship ◽  
Learning And Instruction

In this article, we focus on the contingency between learning and instruction in physical education (PE). We argue that the complex interconnectedness of teachers’ instruction and students’ learning processes should be studied using a unit of analysis that expresses the relationship between the two factors. A contingency perspective foregrounds the individual differences between different learners and how a teacher regards these differences. Furthermore, it has the potential to provide a precise lens for empirical research on how the students’ situations shape the evolution of the teaching--learning process. Based on scaffolding research and adaptive teaching research, which draws on socio-constructivist foundations, we call this unit of analysis ‘contingency’. We outline a framework of research that suggests depicting contingency dimensions, respective instructional continua, and contingency rules when investigating contingency in PE. Furthermore, autonomy as a core contingency dimension for PE and methodological issues will be discussed.

scholarly journals Effect of genotype, age of hens and K/k allele on eggshell quality

2011 ◽  
Vol 56 (No. 5) ◽  
pp. 242-249 ◽  
Author(s):  
Z. Ledvinka ◽  
L. Zita ◽  
M. Hubený ◽  
E. Tůmová ◽  
M. Tyller ◽  
...  
Keyword(s):  
Growth Rate ◽  
Egg Production ◽  
Statistical Significance ◽  
Live Weight ◽  
Shape Index ◽  
Feed Mixture ◽  
Eggshell Quality ◽  
Feather Growth ◽  
Two Factors ◽  
The Relationship

We assessed the influence of the particular genotype, age of layers, feather growth-rate gene, and their mutual interactions on selected indicators of eggshell quality in six groups of hens of the laying type Dominant. The following genotypes were examined in the experiment: Barred Plymouth Rock, Dominant BPR 951 (K) strain, slow-feathering; Barred Plymouth Rock, Dominant BPR 901 (k) strain, fast-feathering; Blue Plymouth Rock, Dominant BLPR 954 (K) strain, slow-feathering; Blue Plymouth Rock, Dominant BLPR 894 (k) strain, fast-feathering; crossbreds of the above strains in the F<sub>1</sub> generation Dominant D 107 blue (K), slow-feathering and Dominant D 107 blue (k), fast-feathering. The layers were fed a feed mixture NP1 (16.64 % CP) from the 20<sup>th</sup> week of age and a feed mixture NP2 (15.02% CP) from the 42<sup>nd</sup> week. Husbandry conditions met the regular requirements of laying hens. Egg production and live weight of hens were monitored for the duration of the experiment (12 months). Eggshell quality was examined at the layers' age of 27, 35 and 56 weeks. The average hen-day egg production for the duration of the experiment (12 months) was not significantly influenced by the particular genotype or the feather growth-rate gene. The varying representation of the feather growth-rate gene significantly (P &le; 0.001) influenced the live weight; similarly, the relationship between the genotype and the representation of K/k alleles was significant. The average egg weight was influenced statistically significantly (P &le; 0.001) by the age of hens, their genotype (P &le; 0.05), feather growth-rate gene (P &le; 0.001), and the relationship between the age and genotype (P &le; 0.001). The age of hens, genotype, and the interaction of these two factors affected the egg shape index, as did the incidence of the feather growth-rate gene within the population (with a statistical significance of P &le; 0.001). The age, genotype and the feather growth-rate gene incidence within the population also significantly affected the eggshell quality indicators. In the eggshell to egg ratio, eggshell thickness and strength, an interaction was determined between the age of hens and their particular genotype. The eggshell colour was also significantly (P &le; 0.001) affected by hens' age, genotype (P &le; 0.001), as well as by the feather growth-rate gene (P &le; 0.001). No significant interaction between the age and the genotype was found for this indicator.

scholarly journals The Effect of Family Background on Student Effort

2014 ◽  
Vol 14 (4) ◽  
pp. 1337-1403 ◽  
Author(s):  
Zoë Kuehn ◽  
Pedro Landeras
Keyword(s):  
Parental Education ◽  
Family Background ◽  
Compulsory Education ◽  
Marginal Productivity ◽  
School Students ◽  
Student Effort ◽  
Her Family ◽  
Two Factors ◽  
University Degree ◽  
The Relationship

Abstract Students from more advantageous family backgrounds tend to perform better than those from less advantageous backgrounds. But it is not clear that these students exert more effort. We build a model of students, schools, and employers to study the interaction of family background and effort exerted by the student in the education process. Two factors turn out to be key in determining the relationship between effort and family background: (i) the student’s attitude toward risk and (ii) how the student’s marginal productivity of effort depends on her family background. We show that when the degree of risk aversion is relatively low (high) compared to the sensitivity of the marginal productivity of effort, students from more advantageous family backgrounds exert more (less) effort. Empirically, we find that if parental education was reduced from holding a university degree to incomplete compulsory education, primary and secondary school students would exert around 21–23% less effort (approximately equal to a reduction of 2 hours weekly in homework). For primary school students we also find that marginal productivities of effort are higher for those from less advantageous family backgrounds.

scholarly journals Astronomical phenomena in Dresden codex

2013 ◽  
pp. 53-64
Author(s):  
V. Böhm ◽  
B. Böhm ◽  
J. Klokocník ◽  
J. Vondrák ◽  
J. Kostelecký
Keyword(s):  
Historical Data ◽  
Large Uncertainty ◽  
Astronomical Data ◽  
Julian Date ◽  
History Of ◽  
Solar Eclipses ◽  
Dresden Codex ◽  
The Relationship

The relationship between Maya and our calendar is expressed by a coefficient known as ?correlation? which is a number of days that we have to add to the Mayan Long Count date to get Julian Date used in astronomy. There is surprisingly large uncertainty in the value of the correlation, yielding a shift between both calendars (and thus between the history of Maya and of our world) to typically several hundred years. There are more than 50 diverse values of the correlation, some of them derived from historical, other by astronomical data. We test here (among others) the well established Goodman-Mart?nez-Thompson correlation (GMT), based on historical data, and the B?hms? one (B&B), based on astronomical data decoded from the Dresden Codex (DC); this correlation differs by about +104 years from the GMT. In our previous works we used several astronomical phenomena as recorded in the DC for a check. We clearly demonstrated that (i) the GMT was not capable to predict these phenomena that really happened in nature and (ii) that the GMT predicts them on the days when they did not occur. The phenomena used till now in the test are, however, short-periodic and the test then may suffer from ambiguity. Therefore, we add long-periodic astronomical phenomena, decoded successfully from the DC, to the testing. These are (i) a synchrony of Venusian heliacal risings with the solar eclipses, (ii) a synchrony of Venus and Mars conjunctions with the eclipses, (iii) conjunctions of Jupiter and Saturn repeated in a rare way, and (iv) a synchrony of synodic and sideric periods of Mercury with the tropical year. Based on our analysis, we find that the B&B correlation yields the best agreement with the astronomical phenomena observed by the Maya. Therefore we recommend to reject the GMT and support the B&B correlation.

scholarly journals DIBs, Interstellar Dust, and Extinction

2013 ◽  
Vol 9 (S297) ◽  
pp. 147-152 ◽  
Author(s):  
G. C. Clayton
Keyword(s):  
Interstellar Medium ◽  
Interstellar Dust ◽  
Dust Grains ◽  
Weak Correlation ◽  
Interstellar Clouds ◽  
The Galaxy ◽  
The Relationship

AbstractThe relationship between DIBs and dust is still unknown. The correlation between reddening and DIB strength means that the DIBs are mixed in with the dust and gas in interstellar clouds. The DIBs are relatively stronger in the diffuse interstellar medium than in dense clouds. There is only a weak correlation between the DIBs and the UV extinction parameters including the 2175 Å bump strength and the far-UV rise. In addition, the bump dust grains are sometimes polarized, while the DIBs are not. However, observations of DIBs in the SMC show that when the 2175 Å bump is weak or missing so are the DIBs. Two of the four sightlines that deviate strongly from the CCM UV extinction in the Galaxy show weak DIBs.

Depressive Experience and Romantic Relationships in Young Adulthood

1998 ◽  
Vol 82 (1) ◽  
pp. 339-349 ◽  
Author(s):  
Thomas L. Morrison ◽  
Anthony J. Urquiza ◽  
Beth L. Goodlin-Jones
Keyword(s):  
Romantic Relationships ◽  
Relationship Satisfaction ◽  
Young Adulthood ◽  
Local Community ◽  
Attachment Security ◽  
Relationship Distress ◽  
Sexual Dissatisfaction ◽  
Two Factors ◽  
Relational Aspect ◽  
The Relationship

This study examined the associations between two factors of depressive experience (dependency and self-criticism) and satisfaction in adult romantic relationships. The Depressive Experiences Questionnaire, along with measures of attachment and relationship satisfaction, were administered to 107 men and 140 women attending local community colleges. Self-criticism was associated with global relationship distress and sexual dissatisfaction. In a combined regression equation, measures of self-criticism, attachment security, and attachment activation all contributed to predicting general relationship distress. Only scores on self-criticism predicted sexual dissatisfaction. The relationship dissatisfaction reported by those with high scores on self-criticism appears to be a relational aspect of the “destructiveness of perfectionism” described by Blatt.

Research on the Dilemma and Path of Rural Industry Integration and Internet Revitalization Driven by E-commerce

2021 ◽  
Vol 7 (5) ◽  
pp. 4163-4171
Author(s):  
Feng Xu
Keyword(s):  
Internet Technology ◽  
The Internet ◽  
Development Mode ◽  
Rural Industry ◽  
Effective Strategies ◽  
Correlation Degree ◽  
New Development ◽  
Two Factors ◽  
Industry Integration ◽  
The Relationship

The emergence of Internet technology provides a new development mode for the development of rural industry. In view of the fact that the rural integrated Internet is in its infancy, and the unpredictability and uncertainty of “Internet +” innovation in the era of “digital economy”, the development of rural integrated Internet is facing many challenges, and there are development misunderstandings and dilemmas. This paper studies the dilemma and path of rural industry integration and Internet revitalization driven by e-commerce. Driven by e-commerce, this paper analyzes the current situation of the Internet revitalization of rural industry integration, summarizes the problems existing in the Internet revitalization of rural industry integration, constructs a grey correlation model to analyze the correlation degree of the influencing factors in the rural industry and Internet integration, and takes a certain rural industry as an example to prove that the model can be used to analyze the relationship between the two factors On this basis, the paper puts forward the effective strategies of rural industry integration and Internet revitalization driven by e-commerce.

scholarly journals Encouragement Is Not Enough: Perceptions and Attitudes towards Corrective Feedback and Their Relationship to Self-Efficacy

2021 ◽  
Author(s):  
Vasti Holstun ◽  
Neil Rigsbee ◽  
Lynn Bohecker
Keyword(s):  
Counselor Education ◽  
Self Efficacy ◽  
Significant Positive Correlation ◽  
Corrective Feedback ◽  
Educational Programs ◽  
Online Counseling ◽  
Perceptions And Attitudes ◽  
Two Factors ◽  
The Relationship ◽  
Online Counselor

This correlational study explored the relationship between feedback and counselor self-efficacy during online counselor education residency. Participants (N=145) were students from eight Council for Accreditation of Counseling and Related Educational Programs (CACREP) accredited online counseling programs who completed instruments on perceptions of positive and corrective feedback, attitudes towards corrective feedback, and counselor self-efficacy. Results showed a significant positive correlation between perceptions of corrective feedback and self-efficacy. Two factors related to perceptions of corrective feedback also showed significant correlations with self-efficacy. Implications concerning providing corrective feedback in supervision for counselor in training are discussed.

scholarly journals Boolean Implication Analysis Unveils Candidate Universal Relationships in Microbiome Data

2020 ◽  
Author(s):  
Daniella Vo ◽  
Shayal Charisma Singh ◽  
Sara Safa ◽  
Debashis Sahoo
Keyword(s):  
Disease Diagnosis ◽  
Biological Properties ◽  
Weak Correlation ◽  
Human Environment ◽  
Asymmetric Data ◽  
Therapeutic Properties ◽  
Almost All ◽  
Microbiome Data ◽  
The Relationship ◽  
Boolean Implication

Abstract Background: Microbiomes consist of bacteria, viruses, and other microorganisms, and are responsible for many different functions in both organisms and the environment. Some previous analyses of microbiomes focus on the relationships between specific microbiomes and a particular disease. These typically use correlation which is fundamentally symmetric with respect to pairs of microbes. Correlation focuses on the symmetry of the data distribution, and asymmetric data is often discarded as having a weak correlation. With all the data available on the microbiome, there is a need for a method that comprehensively studies microbiomes and how they are related to each other.Results: We collect publicly available datasets from human, environment, and animal samples to determine both symmetric and asymmetric Boolean relationships between a pair of microbes. We then find relationships that are potentially invariants, meaning they will hold in any microbe community. In other words, if we determine there is a relationship between two microbes, we expect the relationship to hold in almost all context. We discovered that certain pairs of microbes always exhibit the same relationship in almost all the datasets we studied, thus making them good candidates for universal relationships. Our results confirm known biological properties and seem promising in terms of disease diagnosis.Conclusions: Since the relationships are likely universal, we expect that they will hold in a clinical setting as well as in the general population. Strong universal relationships may provide insight on prognostic, predictive, or therapeutic properties of a clinically relevant disease. These new analyses may improve disease diagnosis and drug development in terms of accuracy and efficiency.

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