AN ANALYSIS OF FACTORS INFLUENCING REGIONAL LABOR FORCE MIGRATION, 1960-1970

Labor and Human Capital,

I Want to Be in Georgia : When the Roses Bloom Again

https://digitalcommons.library.umaine.edu/mmb-vp/1692/thumbnail.jp

Two-dimensional quantum Yang-Mills theory with corners

The solution of quantum Yang-Mills theory on arbitrary compact two-manifolds is well known. We bring this solution into a TQFT-like form and extend it to include corners. Our formulation is based on an axiomatic system that we hope is flexible enough to capture actual quantum field theories also in higher dimensions. We motivate this axiomatic system from a formal Schroedinger-Feynman quantization procedure. We also discuss the physical meaning of unitarity, the concept of vacuum, (partial) Wilson loops and non-orientable surfaces.Comment: 31 pages, 6 figures, LaTeX + AMS; minor corrections, reference update

Initial risk matrix, home resources, ability development and children’s achievement

This paper investigates the development of basic cognitive, motor and noncognitive abilities from infancy to adolescence. We analyse the predictive power of these abilities, initial risk conditions and home resources for children’s achievement. Our data are taken from the Mannheim Study of Children at Risk (MARS), an epidemiological cohort study, which follows the long-term outcome of early risk factors. Results indicate that differences in abilities increase during childhood, while there is a remarkable stability in the distribution of the economic and socio-emotional home resources during childhood. Initial risk conditions trigger a cumulative effect. Cognitive, motor and noncognitive abilities acquired during preschool age contribute to the prediction of children’s achievement at school age

A geometric approach to the precession of compact binaries

We discuss a geometrical method to define a preferred reference frame for precessing binary systems and the gravitational waves they emit. This minimal-rotation frame is aligned with the angular-momentum axis and fixes the rotation about that axis up to a constant angle, resulting in an essentially invariant frame. Gravitational waveforms decomposed in this frame are similarly invariant under rotations of the inertial frame and exhibit relatively smoothly varying phase. By contrast, earlier prescriptions for radiation-aligned frames induce extraneous features in the gravitational-wave phase which depend on the orientation of the inertial frame, leading to fluctuations in the frequency that may compound to many gravitational-wave cycles. We explore a simplified description of post-Newtonian approximations for precessing systems using the minimal-rotation frame, and describe the construction of analytical/numerical hybrid waveforms for such systems.Comment: Minor clarifications and journal referenc

Risk Prediction for Breast, Endometrial, and Ovarian Cancer in White Women Aged 50 y or Older: Derivation and Validation from Population-Based Cohort Studies

Background: Breast, endometrial, and ovarian cancers share some hormonal and epidemiologic risk factors. While several models predict absolute risk of breast cancer, there are few models for ovarian cancer in the general population, and none for endometrial cancer. Methods and Findings: Using data on white, non-Hispanic women aged 50+ y from two large population-based cohorts (the Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial [PLCO] and the National Institutes of Health–AARP Diet and Health Study [NIH-AARP]), we estimated relative and attributable risks and combined them with age-specific US-population incidence and competing mortality rates. All models included parity. The breast cancer model additionally included estrogen and progestin menopausal hormone therapy (MHT) use, other MHT use, age at first live birth, menopausal status, age at menopause, family history of breast or ovarian cancer, benign breast disease/biopsies, alcohol consumption, and body mass index (BMI); the endometrial model included menopausal status, age at menopause, BMI, smoking, oral contraceptive use, MHT use, and an interaction term between BMI and MHT use; the ovarian model included oral contraceptive use, MHT use, and family history or breast or ovarian cancer. In independent validation data (Nurses' Health Study cohort) the breast and ovarian cancer models were well calibrated; expected to observed cancer ratios were 1.00 (95% confidence interval [CI]: 0.96–1.04) for breast cancer and 1.08 (95% CI: 0.97–1.19) for ovarian cancer. The number of endometrial cancers was significantly overestimated, expected/observed = 1.20 (95% CI: 1.11–1.29). The areas under the receiver operating characteristic curves (AUCs; discriminatory power) were 0.58 (95% CI: 0.57–0.59), 0.59 (95% CI: 0.56–0.63), and 0.68 (95% CI: 0.66–0.70) for the breast, ovarian, and endometrial models, respectively. Conclusions: These models predict absolute risks for breast, endometrial, and ovarian cancers from easily obtainable risk factors and may assist in clinical decision-making. Limitations are the modest discriminatory ability of the breast and ovarian models and that these models may not generalize to women of other races. Please see later in the article for the Editors' Summar

Reported Barriers to Mental Health Care in Three Samples of U.S. Army National Guard Soldiers at Three Time Points

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/108379/1/jts21942.pd

The Lantern Vol. 47, No. 1, December 1980

• Renewal • She Threw Down Her Diamond • Ragnarok • Cinquains • Euphoria • To the Nahua of the Valley of Mexico • Inamorata • Unspoken Passion • Clouds of Circus Cotton Candy Pink • The First Mate Finds a Captain (Almost) • Dance of Defiance • Concert • Blame • I\u27ve Seen That Movie Too • Greystone • The Philosophers of The Tower • Span • Commando • Cheshire • Summertime, Kryptonite and Falstaf(f) • Experience • Fluid Time • The Plight of Fred in Bed • A Way With Men • Courage to Love - (To A.) • Winter Sleep • Berniehttps://digitalcommons.ursinus.edu/lantern/1117/thumbnail.jp

Physical Activities in Adolescent Girls: Variability in Energy Expenditure

Background - Understanding interindividual variability of energy expended in common activities is important for determining precise estimates of energy expenditure in surveillance studies and clinical trials. The purpose of this study was to describe the variability in energy expenditure for selected physical activities among adolescent girls. Methods - Seventy-four adolescent girls (aged 13 to 14 years) participated in this cross-sectional investigation. Data were collected in 2001 and analyzed in 2004. Energy expenditure was measured by indirect calorimetry for ten activities and during a submaximal cycle ergometer test, which was used to estimate cardiorespiratory fitness. Variability in energy expended for the various activities was expressed by standard deviation, coefficient of variation, and range for three different energy expenditure variables: relative VO2 (milliliters per kilogram per minute), absolute VO2 (liters per minute-1), and calculated metabolic rate (kilojoules per minute). Results - Depending on the expression of energy expenditure, coefficients of variation ranged from a low of 13.2% for climbing stairs to a high of 38.4% for playing a computer game. Some lower-intensity activities were associated with greater variability in energy expenditure. Bicycling showed consistently higher coefficients of variation across expressions of energy expenditure (29.1%, 37.1%, and 33.5% for relative VO2, absolute VO2, and calculated metabolic rate, respectively). Conclusions - Energy expenditure for common activities is highly variable in adolescent girls. The coefficient of variation was higher in some activities of lower intensity, regardless of energy expenditure expression. This variance may influence the evaluation of physical activity interventions, particularly with regard to issues such as prescribed dose of activity and the statistical power to detect change

The Lantern Vol. 47, No. 1, December 1980

• Renewal • She Threw Down Her Diamond • Ragnarok • Cinquains • Euphoria • To the Nahua of the Valley of Mexico • Inamorata • Unspoken Passion • Clouds of Circus Cotton Candy Pink • The First Mate Finds a Captain (Almost) • Dance of Defiance • Concert • Blame • I\u27ve Seen That Movie Too • Greystone • The Philosophers of The Tower • Span • Commando • Cheshire • Summertime, Kryptonite and Falstaf(f) • Experience • Fluid Time • The Plight of Fred in Bed • A Way With Men • Courage to Love - (To A.) • Winter Sleep • Berniehttps://digitalcommons.ursinus.edu/lantern/1117/thumbnail.jp