Results 71 to 80 of about 1,056 (198)

Opening the Black Box of Nonprofit Reputation and Volunteer Attraction With Supervised Machine Learning

Nonprofit Management and Leadership, EarlyView.
ABSTRACT With the aim to explore the potential of machine learning for nonprofit research, this article contrasts traditional linear regression with four contemporary supervised machine learning approaches. Concretely, we predict (1) reputation ratings and (2) the total number of volunteers for 4021 non‐profit organizations in the U.S.
Moritz Schmid, Hannes Lampe, Jurgen Willems   +2 more
wiley   +1 more source

Do Single‐Sex STEM Programs Have Merit? If So, for Whom, on What Measures?

Science Education, EarlyView.
ABSTRACT Single‐sex STEM programs—defined here as voluntary, gender‐segregated extracurricular or supplemental activities (e.g., summer camps, workshops, robotics clubs, internships, or citizen science initiatives)—have experienced heightened popularity and scrutiny amid efforts to increase diversity in STEM fields.
Chen Chen, Tomihiro Ono, Gerhard Sonnert, Susan Sunbury, Philip Sadler   +4 more
wiley   +1 more source

Substitution of Ti by Nb in Maraging Steel: Effects on Strengthening Mechanisms and Crystallographic Behavior

steel research international, EarlyView.
This work demonstrates that replacing Ti with Nb in maraging steel forms nanoscale Nb–Mo particles along boundaries, strengthening the alloy without relying on Ti phases. Heat‐treatment tuning promotes uniform crystal orientation and balanced grain boundaries, enabling strong yet ductile behavior.
Mohamad Masoumi, Manoel José, Gerardo Jesus Aracena Pérez, Isabel Ferreira Barros, Marcos Natan da Silva Lima, Geronimo Perez, Samuel Lucas Santos Medeiros, Pedro Henrique Pinheiro Lima, Luís Flávio Gaspar Herculano, Maria Vittoria Moraschini Reis, Sérgio Souto Maior Tavares, Farina Alexandre Bellegard, Fridman Daniel Pallos, Miloslav Béreš, Hamilton Ferreira Gomes de Abreu   +14 more
wiley   +1 more source

Environmental drivers of metapopulation dynamics throughout the full annual cycle in a declining Arctic‐nesting migratory herbivore

Journal of Animal Ecology, EarlyView.
We provide a framework for extending commonly used integrated population models to a metapopulation framework for testing novel ecological hypotheses about how changing environmental conditions within and among subpopulations drive changes in animal abundance.
Alexander R. Schindler, Anthony D. Fox, Alyn J. Walsh, Larry R. Griffin, Seán B. A. Kelly, Mitch D. Weegman   +5 more
wiley   +1 more source

Can prisons move people into better jobs? A look at correctional vocational training programs and sectoral employment outcomes

Criminology, EarlyView.
Abstract Three‐quarters of US prisons offer vocational training programs, which aim to place trainees in middle‐skills jobs in specific occupational sectors post‐release. These middle‐skills jobs may more effectively reduce recidivism than the jobs that normally characterize the labor market experience of the formerly incarcerated, yet whether ...
Britte van Tiem
wiley   +1 more source

Turán Inequalities for Symmetric Askey-Wilson Polynomials

Rocky Mountain Journal of Mathematics, 2000
The authors study a renormalized \(A-W\) polynomial \(V_n(x)\). Using the Szász technique they establish the inequalities \[ 0\leq V_n^2(x)-V_{n+1} (x)V_{n-1} (x)\leq K, \] where \(K\) is independent of \(x\). The two inequalities hold under certain conditions upon parameters and variable.
Abreu, L.D., Bustoz, J.
openaire   +3 more sources

Environmentally adjusted productivity growth and shadow prices for dairy farms

Canadian Journal of Agricultural Economics/Revue canadienne d'agroeconomie, EarlyView.
Abstract We estimate the environmentally adjusted productivity growth and shadow price for Ontario dairy farms. We use an input‐oriented directional distance function and farm‐level data from 2000 to 2020. First, we find that while GHG emissions per cow increase with higher milk yields, emission intensity decreases as milk yield per cow increases.
Bibek Dahal, Getu Hailu, Susantha Jayasundara   +2 more
wiley   +1 more source

Peri‐Implant Crevicular Fluid Analysis by Mid‐Infrared Spectroscopy in Peri‐Implantitis—A Pilot Study

Clinical Oral Implants Research, EarlyView.
ABSTRACT Objectives This study aimed to assess biochemical differences in peri‐implant crevicular fluid (PICF) using ATR‐FTIR spectroscopy and multivariate analysis, through a between‐participant comparison of healthy and peri‐implantitis (PI) sites, and a within‐participant comparison of PI‐PICF and GCF from contralateral periodontal healthy teeth ...
Francisco Maligno, Ricardo N. M. J. Páscoa, Pedro S. Gomes   +2 more
wiley   +1 more source

Scalar blocks as gravitational Wilson networks

Journal of High Energy Physics, 2018
In this paper we continue to develop further our prescription [ arXiv:1602.02962 ] to holographically compute the conformal partial waves of CFT correlation functions using the gravitational open Wilson network operators in the bulk.
Atanu Bhatta, Prashanth Raman, Nemani V. Suryanarayana   +2 more
doaj   +1 more source

Nonsymmetric Askey–Wilson polynomials and Q-polynomial distance-regular graphs

Journal of Combinatorial Theory, Series A, 2017
In his famous theorem (1982), Douglas Leonard characterized the $q$-Racah polynomials and their relatives in the Askey scheme from the duality property of $Q$-polynomial distance-regular graphs. In this paper we consider a nonsymmetric (or Laurent) version of the $q$-Racah polynomials in the above situation.
openaire   +3 more sources