The development of methods to increase sintered density and improve dimensional tolerances is
a crucial issue in powder metallurgy and ceramic processing. Increasing the packing density of
starting powders is one effective route to achieve high sintered density and dimensional
precision. The current paper presents an in-depth study on the...
Several studies in recent years have demonstrated that upper-division students struggle with partial derivatives
and the complicated chain rules ubiquitous in thermodynamics. We asked several experts (primarily faculty who teach
thermodynamics) to solve a challenging and novel thermodynamics problem in order to understand how they navigate through
this maze. What...
In this technical note, a steady-state analytical solution of concentrations of a parent solute reacting to a daughter solute, both of which are undergoing transport and multirate mass transfer, is presented. Although the governing equations are complicated, the resulting solution can be expressed in simple terms. A function of the...
The recovery of a 1.5 million yr long ice core from Antarctica represents a keystone of our understanding of Quaternary climate, the progression of glaciation over this time period and the role of greenhouse gas cycles in this progression. Here we tackle the question of where such ice may still...
Since a NanoSIMS high-resolution secondary ion mass spectrometry instrument was first used for cosmochemistry investigations over a decade ago, both interest in NanoSIMS and the number of instruments available have significantly increased. However, SIMS comes with a set of challenges that are of both technical and conceptual nature, particularly for...
The cinema of the GDR has seen a steep rise in popularity since German unification. DEFA is now a popular “brand,” with its films being omnipresent on television, in movie theaters, and on DVD, Blu-ray, and online streaming video. Reasons for this success are located in the current infrastructure of...
We present a high-resolution Gravity Recovery and Climate Experiment (GRACE) mascon solution for Gulf of Alaska (GOA) glaciers and compare this with in situ glaciological, climate and other remote-sensing observations. Our GRACE solution yields a GOA glacier mass balance of -65 ± 11 Gta⁻¹ for the period December 2003 to...
Cerium oxide nanoparticles were continuously
precipitated from a solution of cerium(III) nitrate and ammonium
hydroxide using a static microchannel T-mixer. Tmixer
synthesis results were compared with synthesis results
from batch precipitation. Findings show that the method of
mixing is important in the ceria precipitation process. Uniform
porous film structures and...
The current study examines the effects of Head Start on the development of school readiness outcomes for children living in non-parental care. Data were obtained from the Head Start Impact Study, a randomized controlled trial of Head Start conducted with a nationally representative sample of Head Start programs and families....