Tufts University

About: Tufts University is a education organization based out in Medford, Massachusetts, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 32800 authors who have published 66881 publications receiving 3451152 citations. The organization is also known as: Tufts College & Universitatis Tuftensis.

Concepts and Theories of Human Development

Abstract: Contents: Preface to the Third Edition. Preface to the Second Edition. Preface to the First Edition. Human Development: Facts or Theory? Historical Roots of Human Development Concepts and Theories. Philosophical Models of Development. The Nature-Nurture Controversy: Implications of the Question How? The Continuity-Discontinuity Issue. Resolving the Nature-Nurture Controversy: T.C. Schneirla and the Concept of Levels of Integration. Developmental Systems Theories. Developmental Systems Theories: The Sample Case of Developmental Contextualism. Life-Span, Action Theory, Life-Course, and Bioecological Perspectives. Nature Approaches to Human Development: Behavioral Genetics. Nature Approaches to Development: The Sample Case of Intelligence and the Work of Sir Cyril Burt and Arthur Jensen. Nature Approaches to Development: Konrad Lorenz and the Concept of "Instinct." Nature Approaches to Development: Sociobiology. Cognition and Development: From Neo-Nativism to Developmental Systems. Stage Theories of Development. The Differential Approach. The Ipsative Approach to Development. Methodological Issues in the Study of Human Development. Applied Developmental Science.

Tn-seq: high-throughput parallel sequencing for fitness and genetic interaction studies in microorganisms.

Abstract: High-throughput sequencing of Mariner transposon insertion libraries is used for quantitative studies of fitness and of genetic interactions in Streptococcus pneumoniae. The approach should allow similar studies in several microorganismal species.

THE EVOLUTION OF THE STELLAR MASS FUNCTIONS OF STAR-FORMING AND QUIESCENT GALAXIES TO z = 4 FROM THE COSMOS/UltraVISTA SURVEY*

Abstract: We present measurements of the stellar mass functions (SMFs) of star-forming and quiescent galaxies to z = 4 using a sample of 95,675 K$_s$ -selected galaxies in the COSMOS/UltraVISTA field. The SMFs of the combined population are in good agreement with previous measurements and show that the stellar mass density of the universe was only 50%, 10%, and 1% of its current value at z ~{} 0.75, 2.0, and 3.5, respectively. The quiescent population drives most of the overall growth, with the stellar mass density of these galaxies increasing as {$ρ$}$_{star}$vprop(1 + z)$^{–4.7 ± 0.4}$ since z = 3.5, whereas the mass density of star-forming galaxies increases as {$ρ$}$_{star}$vprop(1 + z)$^{–2.3 ± 0.2}$. At z {gt} 2.5, star-forming galaxies dominate the total SMF at all stellar masses, although a non-zero population of quiescent galaxies persists to z = 4. Comparisons of the K$_s$ -selected star-forming galaxy SMFs with UV-selected SMFs at 2.5 {lt} z {lt} 4 show reasonable agreement and suggest that UV-selected samples are representative of the majority of the stellar mass density at z {gt} 3.5. We estimate the average mass growth of individual galaxies by selecting galaxies at fixed cumulative number density. The average galaxy with log(M $_{star}$/M $_{☉}$) = 11.5 at z = 0.3 has grown in mass by only 0.2 dex (0.3 dex) since z = 2.0 (3.5), whereas those with log(M $_{star}$/M $_{☉}$) = 10.5 have grown by {gt}1.0 dex since z = 2. At z {lt} 2, the time derivatives of the mass growth are always larger for lower-mass galaxies, which demonstrates that the mass growth in galaxies since that redshift is mass-dependent and primarily bottom-up. Lastly, we examine potential sources of systematic uncertainties in the SMFs and find that those from photo-z templates, stellar population synthesis modeling, and the definition of quiescent galaxies dominate the total error budget in the SMFs. Based on data products from observations made with ESO Telescopes at the La Silla Paranal Observatory under ESO programme ID 179.A-2005 and on data products produced by TERAPIX and the Cambridge Astronomy Survey Unit on behalf of the UltraVISTA consortium.