Results 21 to 30 of about 162,845 (323)
SSRN Electronic Journal, 2021 Abstract We use data on all middle and high school aged children who survived a mass shooting incident on July 22, 2011 in Utoya, Norway, to understand how such events affect survivors, their families, and their peers. Using a difference-in-differences design to compare survivors to a matched control group, we find that in the short run children who ...
Manudeep Bhuller +6 more
openaire +2 more sources
Notulae Scientia Biologicae, 2018 Plant spacing determines to a greater extent crop performance in terms of growth and yield. The production of crop with organic fertilizer also plays a vital role in organic agriculture. Field studies were conducted to evaluate the effects of spacing and
Ehizogie Joyce FALODUN +1 more
doaj +1 more source
Effect of Selenium and Silicon Foliar Spraying on Some Physiological Traits and Yield Parameters of Origanum vulgare L. under Drought Stress [PDF]
مدیریت بیابان, 2021 Selenium (Se) and silicon (Si) are identified to affect plant physiological attributes and yield parameters. Se and Si’s effective roles in reducing various environmental stresses in plant of Origanum vulgare L.
Seyed Reze Mahdavi Ardakani +3 more
doaj +1 more source
Shooting function for 1D Schrodinger operators [PDF]
, 2022 For Schrodinger operators with suitable 1D potentials, focussing particularly on those that go to infinity at infinity, a characteristic function is constructed, via shooting functions. It is proved to be entire and its zeroes to be the eigenvalues.
arxiv +1 more source
Revista Brasileira de Zootecnia, 2010 The objective of this work was to study morphogenic characteristics, and dry matter production of roots and shoots of marandu palisadegrass (Brachiaria brizantha cv.
Marcio Mahmoud Megda +1 more
doaj +1 more source
Assessing the contagiousness of mass shootings with nonparametric Hawkes processes [PDF]
, 2020 Gun violence and mass shootings are high-profile epidemiological issues facing the United States with questions regarding their contagiousness gaining prevalence in news media. Through the use of nonparametric Hawkes processes, we examine the evidence for the existence of contagiousness within a catalog of mass shootings and highlight the broader ...
arxiv +1 more source
Changes in the structural indices of annual shoots of Quercus rubra under anthropogenic impact
Biosystems Diversity, 2017 Air pollution is one of the important problems of large cities. In connection with this, comprehensive study of the mechanisms of the corresponding reactions of tree species, introduced in the process of landscaping, to various environmen tal factors is ...
V. P. Bessonova, A. P. Kryvoruchko
doaj +1 more source
US Fatal Police Shooting Analysis and Prediction [PDF]
arXiv, 2021 We believe that "all men are created equal". With the rise of the police shootings reported by media, more people in the U.S. think that police use excessive force during law enforcement, especially to a specific group of people. We want to apply multidimensional statistical analysis to reveal more facts than the monotone mainstream media.
arxiv
On Adaptive Multiple-Shooting Method for Stochastic Multi-Point Boundary Value Problems [PDF]
Numerical Algorithms, 2017, 2013 This paper presents an adaptive multiple-shooting method to solve stochastic multi-point boundary value problems. The heuristic to choose the shooting points is based on separating the effects of drift and diffusion terms and comparing the corresponding solution components with a pre-specified initial approximation.
arxiv +1 more source
A shooting algorithm for problems with singular arcs [PDF]
Journal of Optimization Theory and Applications 158, 2 (2013)
419-459, 2012 In this article we propose a shooting algorithm for a class of optimal control problems for which all control variables appear linearly. The shooting system has, in the general case, more equations than unknowns and the Gauss-Newton method is used to compute a zero of the shooting function. This shooting algorithm is locally quadratically convergent if
arxiv +1 more source