THE PEAK VELOCITY AND SKEWNESS RELATIONSHIP FOR THE REFLEXIVE SACCADES

2002 ◽  
Vol 14 (02) ◽  
pp. 71-80 ◽  
Author(s):  
YUNG-FU CHEN ◽  
HSUAN-HUNG LIN ◽  
TAINSONG CHEN ◽  
TZU-TUNG TSAI ◽  
I-FEN SHEE
Keyword(s):  
Peak Velocity ◽  
Normal Subjects ◽  
Saccadic Amplitude ◽  
Wide Range ◽  
Acceleration And Deceleration ◽  
History Of ◽  
Saccadic Velocity ◽  
Highly Correlated ◽  
The Relationship ◽  
Reflexive Saccades

The main sequence relations of saccades stated that the duration was linearly correlated to the saccadic amplitude for a wide range, whereas the peak velocity correlated exponentially to the amplitude with saturation occurred at 30°-40°. Skewness was used efficiently in delineating the asymmetry between the acceleration and deceleration phases of the saccadic velocity profiles. It can be estimated from the shape parameter obtained by applying gamma function to the velocity profile. The relationship between peak velocity and skewness was derived according to the following observations. (1) At the same target amplitude and under the similar test conditions, data from previous investigations showed that great intra- and inter-subject variation of the peak velocity and the skewness were always observed. (2) Although the velocity was substantially decreased and the duration greatly increased, accuracy was not affected with the saccadic amplitude was almost unchanged for the subjects after diazepam had been taken. (3) The duration of acceleration phase is almost unchanged for different amplitudes. Fifteen normal subjects (range 21 to 26 years with mean of 23.6) without history of neurological disease were recruited and tested in this study. Electro-oculograph (EOG) was used for recording the eye movements with amplitudes ranging from 10° to 60°. The results show that the data were highly correlated to the derived peak velocity and skewness relation with correlation coefficient (R) as high as 0.66-0.92 for great amplitudes (>30°). This study provides an alternative method in quantitative analysis of saccadic dynamics

scholarly journals Assortative Mating, Income Inequality, and Place

2021 ◽  
Author(s):  
◽  
Avril Macfarlane
Keyword(s):  
Income Inequality ◽  
Assortative Mating ◽  
Household Income ◽  
European Social Survey ◽  
Highly Educated ◽  
Wide Range ◽  
Negative Effect ◽  
Educational Assortative Mating ◽  
Highly Correlated ◽  
The Relationship

<p>There is a growing concern internationally about levels of income inequality, and the negative effect this has on the functioning of societies both in terms of productivity and social harmony. An unexpected contributor to inequality is assortative mating - the phenomenon of “like marrying like”. Educational attainment is highly correlated with income; when two highly educated people partner and form a household they are more likely to appear at the top of the household income distribution, while couples with only primary or incomplete secondary education appear at the bottom. Therefore the greater the propensity to mate assortatively the more unequal the distribution of household income becomes.   I ask two questions of the relationship between educational assortative mating and household income inequality. Firstly, how do countries (in Europe) differ in their degree of educational assortative mating? Secondly, what is the evidence that such differences are reflected in indicators of household income inequality?   My study differs from the prevailing approaches to this question by taking a geographical approach. Instead of comparing a single country over time and monitoring the correspondence between assortative mating and income inequality, I compare a wide range of countries, using a uniform instrument, at one point in time. In order to do so I draw on the unit records of 29 countries from the European Social Survey administered in 2012.   From these unit record data I have been able to identify two important patterns. Firstly, there is a clear presence of educational assortative mating in each country. However, the degree differs and it does so primarily as a reflection of the overall level of education in the country. Rising levels of education lower the returns for education, in turn making assortative mating comparatively less attractive. As a result, the level of assortative mating, compared to what would be expected under random conditions, is lower in highly educated nations. The lowered level of assortative mating in highly educated nations reduces the barriers to social mobility through marriage for those without university educations. Consequently, household income inequality is seen to be intrinsically related to assortative mating, although the outcomes can be mitigated by redistribution policies.</p>

scholarly journals Assortative Mating, Income Inequality, and Place

2021 ◽  
Author(s):  
◽  
Avril Macfarlane
Keyword(s):  
Income Inequality ◽  
Assortative Mating ◽  
Household Income ◽  
European Social Survey ◽  
Highly Educated ◽  
Wide Range ◽  
Negative Effect ◽  
Educational Assortative Mating ◽  
Highly Correlated ◽  
The Relationship

<p>There is a growing concern internationally about levels of income inequality, and the negative effect this has on the functioning of societies both in terms of productivity and social harmony. An unexpected contributor to inequality is assortative mating - the phenomenon of “like marrying like”. Educational attainment is highly correlated with income; when two highly educated people partner and form a household they are more likely to appear at the top of the household income distribution, while couples with only primary or incomplete secondary education appear at the bottom. Therefore the greater the propensity to mate assortatively the more unequal the distribution of household income becomes.   I ask two questions of the relationship between educational assortative mating and household income inequality. Firstly, how do countries (in Europe) differ in their degree of educational assortative mating? Secondly, what is the evidence that such differences are reflected in indicators of household income inequality?   My study differs from the prevailing approaches to this question by taking a geographical approach. Instead of comparing a single country over time and monitoring the correspondence between assortative mating and income inequality, I compare a wide range of countries, using a uniform instrument, at one point in time. In order to do so I draw on the unit records of 29 countries from the European Social Survey administered in 2012.   From these unit record data I have been able to identify two important patterns. Firstly, there is a clear presence of educational assortative mating in each country. However, the degree differs and it does so primarily as a reflection of the overall level of education in the country. Rising levels of education lower the returns for education, in turn making assortative mating comparatively less attractive. As a result, the level of assortative mating, compared to what would be expected under random conditions, is lower in highly educated nations. The lowered level of assortative mating in highly educated nations reduces the barriers to social mobility through marriage for those without university educations. Consequently, household income inequality is seen to be intrinsically related to assortative mating, although the outcomes can be mitigated by redistribution policies.</p>

Poor Little Rich Kids? The Role of Nature versus Nurture in Wealth and Other Economic Outcomes and Behaviours

2019 ◽  
Vol 87 (4) ◽  
pp. 1683-1725 ◽  
Author(s):  
Sandra E Black ◽  
Paul J Devereux ◽  
Petter Lundborg ◽  
Kaveh Majlesi
Keyword(s):  
Adoptive Parents ◽  
Nature Versus Nurture ◽  
Biological Parents ◽  
Wide Range ◽  
Birth Factors ◽  
Nature And Nurture ◽  
Parental Wealth ◽  
Highly Correlated ◽  
The Relationship

Abstract Wealth is highly correlated between parents and their children; however, little is known about the extent to which these relationships are genetic or determined by environmental factors. We use administrative data on the net wealth of a large sample of Swedish adoptees merged with similar information for their biological and adoptive parents. Comparing the relationship between the wealth of adopted and biological parents and that of the adopted child, we find that, even prior to any inheritance, there is a substantial role for environment and a much smaller role for pre-birth factors and we find little evidence that nature/nurture interactions are important. When bequests are taken into account, the role of adoptive parental wealth becomes much stronger. Our findings suggest that wealth transmission is not primarily because children from wealthier families are inherently more talented or more able but that, even in relatively egalitarian Sweden, wealth begets wealth. We further build on the existing literature by providing a more comprehensive view of the role of nature and nurture on intergenerational mobility, looking at a wide range of different outcomes using a common sample and method. We find that environmental influences are relatively more important for wealth-related variables such as savings and investment decisions than for human capital. We conclude by studying consumption as an overall measure of welfare and find that, like wealth, it is more determined by environment than by biology.

scholarly journals The Erythropoietin/Hematocrit Relationship in Normal and Polycythemic Man: Implications of Marrow Regulation

Blood ◽  
1968 ◽  
Vol 32 (4) ◽  
pp. 597-609 ◽  
Author(s):  
JOHN W. ADAMSON
Keyword(s):  
Polycythemia Vera ◽  
Inverse Relationship ◽  
Normal Subjects ◽  
Wide Range ◽  
The Relationship

Abstract The relationship between erythropoietin excretion and change in hematocrit has been determined in normal and polycythemic subjects. Erythropoietin was measured by a method involving the assay of urinary concentrates in polycythemic protein-depleted mice. Basal erythropoietin excretion in normal subjects ranged from 2.8 to 7.5 Standard B units per day. Studies in subjects made anemic by bleeding demonstrated an inverse relationship between hematocrit and the log of erythropoietin excretion. Patients with hypoxia-induced erythrocytosis had increased levels of urinary erythropoietin when their hematocrit was reduced to normal levels by phlebotomy. Three patients whose erythrocytosis was associated with tumors had an erythropoietin excretion which remained constant over a wide range in hematocrit. In polycythemia vera, erythropoietin output was absent or markedly decreased at high hematocrit levels, but measurable erythropoietin appeared in the urine when the hematocrit was reduced to normal or anemic levels by bleeding.

scholarly journals A-41 Exploring the Influence of Referral Source on State Anxiety Levels of Concussed Patients

2020 ◽  
Vol 35 (5) ◽  
pp. 637-637
Author(s):  
K Stephenson ◽  
M N Womble ◽  
R J Elbin
Keyword(s):  
State Anxiety ◽  
Statistical Significance ◽  
Urgent Care ◽  
Athletic Trainer ◽  
Referral Source ◽  
State Trait Anxiety Inventory ◽  
Clinical Visit ◽  
History Of ◽  
Highly Correlated ◽  
The Relationship

Abstract Objective To explore the influence of referral source on state anxiety in concussed athletes. Method One hundred thirty athletes (mean age = 16.46, SD = 1.93 yrs; 42% female) seeking care for a concussion at a specialty clinic within 30 days of injury (M = 8.83, SD = 6.12 days) were enrolled in the study. Demographic (e.g., age, sex, and history of anxiety) and referral source (e.g., emergency department/urgent care, primary care/pediatrician, and athletic trainer) information were collected, and the State-Trait Anxiety Inventory (STAI) was administered to all participants. A one-way analysis of variance (ANOVA) was conducted to compare STAI scores between referral groups, and a logistic regression (LR) was used to assess the relationship between referral sources and patients with and without clinical levels of state anxiety (STAI &gt; 40). Statistical significance for all analyses was (p &lt; .05). Results Approximately 25% (32/130) of patients reported a history of anxiety, and 46% (60/130) scored above clinical cutoffs for clinical anxiety. The referral groups did not differ on STAI scores (F(3, 130) = 1.12, p = .34), and the LR was not significant, (χ2(2, N = 130) = 3.75, p = 0.15). Conclusions History of anxiety was highly correlated with state anxiety at the first clinical visit; however, patients referred from different medical sources did not differ on clinical levels of anxiety at the first clinical visit following concussion.

Radical Parliamentarians and the English Civil War

2018 ◽  
Author(s):  
David R. Como
Keyword(s):  
Civil War ◽  
English Civil War ◽  
Charles I ◽  
Wide Range ◽  
The Press ◽  
King Charles I ◽  
History Of ◽  
The Relationship ◽  
The Way

This book charts the way the English Civil War of the 1640s mutated into a revolution (paving the way for the later execution of King Charles I and the abolition of the monarchy). Focusing on parliament’s most militant supporters, the book reconstructs the origins and nature of the most radical forms of political and religious agitation that erupted during the war, tracing the process by which these forms gradually spread and gained broader acceptance. Drawing on a wide range of manuscript and print sources, the study situates these developments within a revised narrative of the period, revealing the emergence of new practices and structures for the conduct of politics. In the process, the book illuminates the appearance of many of the period’s strikingly novel intellectual currents, including ideas and practices we today associate with western representative democracy—notions of retained natural rights, religious toleration, freedom of the press, and freedom from arbitrary imprisonment. The book also chronicles the way the civil war shattered English Protestantism—leaving behind myriad competing groupings, including congregationalists, baptists, antinomians, and others—while examining the relationship between this religious fragmentation and political change. Finally, the book traces the gradual appearance of openly anti-monarchical, republican sentiment among parliament’s supporters. Radical Parliamentarians provides a new history of the English Civil War, enhancing our understanding of the dramatic events of the 1640s, and shedding light on the long-term political and religious consequences of the conflict.

DETERMINE SERUM LEPTIN CONCENTRATION, INSULIN RESISTANCE AND THE RELATIONSHIP WITH OTHER FACTORS IN PRE-DIABETES POPULATION

2017 ◽  
pp. 34-38
Author(s):  
Minh Triet Tran ◽  
Hai Thuy Nguyen
Keyword(s):  
Insulin Resistance ◽  
Independent Risk Factor ◽  
Metabolic Diseases ◽  
Female Gender ◽  
Normal Subjects ◽  
Early Morning ◽  
Serum Leptin ◽  
Anthropometric Characteristics ◽  
History Of ◽  
The Relationship

Aims: To determine serum leptin concentration, insulin resistance and the relationship with other factors in pre-diabetes population. Methods: A total 275 prediabetic subjects were included in this study. Collected data were: anthropometric characteristics, blood pressure, family history and history of metabolic diseases. Fasting blood samples were obtained in the early morning and assayed for serum leptin, blood glucose, HbA1c, insulin, lipid profile and hsCRP. Results: Serum leptin levels were significant higher (4.57 (0.04 – 61.57) ng/mL) in prediabetes group. The prevalence of hyperleptinemia was 41% and significant associated with female gender, overweight, viseral obesity, insulin, HOMA-IR and hsCRP. The prevalence of insulin resistance was 61% and leptin was an independent risk factor of insulin resistance. Conclusion: Prediabetic patients have higher leptin concentration than normal subjects and hyperleptinemia is associated insulin resistance.

An Alternative Account of the History of Archaeology in the Nineteenth Century

2007 ◽  
Author(s):  
Margarita Diaz-Andreu
Keyword(s):  
Nineteenth Century ◽  
History Of Archaeology ◽  
Post Colonial ◽  
Colonial Studies ◽  
Theoretical Perspectives ◽  
Disciplinary History ◽  
Wide Range ◽  
New Directions ◽  
History Of ◽  
The Relationship

Historians of science (whether philosophers, epistemologists, historians of science, or sociologists of science) have been stubbornly reluctant to deal with archaeology in favour of other disciplines such as geology and medicine. Most histories of archaeology have, therefore, been written by archaeologists and this book is no exception. Being trained in the subtleties of stratigraphy and typology does not, however, provide archaeologists with the necessary tools to confront the history of their own discipline. Many of the histories of archaeology so far written revolve around a narrow, almost positivistic, understanding of what the writing of one’s own disciplinary history represents. This volume attempts to overcome these limitations. Questions addressed have been inspired by a wide range of authors working in the areas of history, sociology, literary studies, anthropology, and the history of science. It uses the case of nineteenth-century world archaeology to explore the potential of new directions in the study of nationalism for our understanding of the history of archaeology. Key concepts and questions from which this study has drawn include the changing nature of national history as seen by historians (Berger et al. 1999b; Hobsbawm 1990) and by scholars working in the areas of literature and political studies (Anderson 1991); transformations within nationalism (Smith 1995); new theoretical perspectives developed within colonial and post-colonial studies (Asad 1973; Said 1978); the relationship between knowledge and power (Foucault 1972 (2002); 1980b); and the consideration of social disciplines as products of history (Bourdieu 1993; 2000; 2004). Perhaps historians and sociologists of science’s lack of enthusiasm to engage with archaeology derives from its sheer lack of homogeneity. The term comes from the Greek arkhaiologia, the study of what is ancient. It most commonly encompasses the analysis of archaeological remains, but the emphasis on what body of data lies within its remit has always differed—and still does—from country to country and within a country between groups of scholars of the various academic traditions. For some it revolves around the study of artistic objects, as well as of ancient inscriptions and coins, for others it encompasses all manifestations of culture from every period of human existence.

scholarly journals Legitimacy, Development and Sustainability: Understanding Water Policy and Politics in Contemporary China

2018 ◽  
Vol 237 ◽  
pp. 153-173 ◽  
Author(s):  
Scott M. Moore
Keyword(s):  
Water Resources ◽  
Environmental Sustainability ◽  
Water Policy ◽  
Historical Perspective ◽  
Contemporary China ◽  
Republic Of China ◽  
Chinese Water ◽  
Wide Range ◽  
History Of ◽  
The Relationship

AbstractMore so than for other countries, the management of China's water resources is an important aspect of its policy and politics, yet existing scholarly attempts to understand this importance are scattered among a wide range of sub-literatures that lack a unifying theoretical framework. This article attempts to identify common themes and features of the relationship between water, politics and governance in contemporary China by examining how this relationship has unfolded in historical perspective. It identifies three basic objectives that have shaped the politics and governance of China's water resources over time: legitimacy, economic development and environmental sustainability. These objectives map, though imperfectly, onto different periods in the history of the People's Republic of China, thereby highlighting how they have evolved. Together, these objectives explain policies towards, and the politics of, water resources in contemporary China. This understanding shows that water both shapes and reflects Chinese politics, and highlights the need for a theoretically coherent sub-literature on Chinese water policy and politics.

scholarly journals The Relationship between Automated Low-Level Velocity Calculations from the WSR-88D and Maximum Tornado Intensity Determined from Damage Surveys

2015 ◽  
Vol 30 (5) ◽  
pp. 1125-1139 ◽  
Author(s):  
Darrel M. Kingfield ◽  
James G. LaDue
Keyword(s):  
Peak Velocity ◽  
Detection Algorithm ◽  
Low Level ◽  
Convective Systems ◽  
Skill Scores ◽  
Wide Range ◽  
The Relationship ◽  
Optimal Strength ◽  
Convective Mode ◽  
Population Threshold

Abstract The relationship between automated low-level velocity derived from WSR-88D severe storm algorithms and two groups of tornado intensity were evaluated using a 4-yr climatology of 1975 tornado events spawned from 1655 supercells and 320 quasi-linear convective systems (QLCSs). A comparison of peak velocity from groups of detections from the Mesocyclone Detection Algorithm and Tornado Detection Algorithm for each tornado track found overlapping distributions when discriminating between weak [rated as category 0 or 1 on the enhanced Fujita scale (EF0 and EF1)] and strong (EF2–5) events for both rotational and delta velocities. Dataset thresholding by estimated affected population lowered the range of observed velocities, particularly for weak tornadoes while retaining a greater frequency of events for strong tornadoes. Heidke skill scores for strength discrimination were dependent on algorithm, velocity parameter, population threshold, and convective mode, and varied from 0.23 and 0.66. Bootstrapping the skill scores for each algorithm showed a wide range of low-level velocities (at least 7 m s−1 in width) providing an equivalent optimal skill at discriminating between weak and strong tornadoes. This ultimately limits identification of a single threshold for optimal strength discrimination but the results match closely with larger prior manual studies of low-level velocities.

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