User profiles for Di Xu

Di Xu

Associate Professor
Verified email at uci.edu
Cited by 7215

Performance gaps between online and face-to-face courses: Differences across types of students and academic subject areas

D Xu, SS Jaggars - The Journal of Higher Education, 2014 - Taylor & Francis
Using a dataset containing nearly 500,000 courses taken by over 40,000 community and
technical college students in Washington State, this study examines the performance gap …

Processing thermogravimetric analysis data for isoconversional kinetic analysis of lignocellulosic biomass pyrolysis: Case study of corn stalk

J Cai, D Xu, Z Dong, X Yu, Y Yang, SW Banks… - … and Sustainable Energy …, 2018 - Elsevier
Modeling of lignocellulosic biomass pyrolysis processes can be used to determine their key
operating and design parameters. This requires significant amount of information about …

The impact of online learning on students' course outcomes: Evidence from a large community and technical college system

D Xu, SS Jaggars - Economics of Education Review, 2013 - Elsevier
Using a large administrative dataset from a statewide system including 34 community and
technical colleges, the authors employed an instrumental variable technique to estimate the …

The Promises and Limits of Online Higher Education: Understanding How Distance Education Affects Access, Cost, and Quality.

D Xu, Y Xu - American Enterprise Institute, 2019 - ERIC
While the supply and demand for online higher education is rapidly expanding, questions
remain regarding its potential impact on increasing access, reducing costs, and improving …

Understanding the determinants of online review helpfulness: A meta-analytic investigation

H Hong, D Xu, GA Wang, W Fan - Decision Support Systems, 2017 - Elsevier
Online consumer reviews can help customers reduce uncertainty and risks faced in online
shopping. However, the studies examining the determinants of perceived review helpfulness …

Meta-Analysis of APOE4 Allele and Outcome after Traumatic Brain Injury

W Zhou, D Xu, X Peng, Q Zhang, J Jia… - Journal of …, 2008 - liebertpub.com
There is conflicting evidence regarding a possible association between the apolipoprotein
E4 (APOE4) allele and the consequences of traumatic brain injury (TBI). Our aim was to carry …

How do online course design features influence student performance?

SS Jaggars, D Xu - Computers & Education, 2016 - Elsevier
Given the rapid growth in online coursework within higher education, it is important to
establish and validate quality standards for these courses. While many online learning quality …

Retracted article: quantized Majorana conductance

H Zhang, CX Liu, S Gazibegovic, D Xu, JA Logan… - Nature, 2018 - nature.com
dI/dV curve at high temperature by convolution of the derivative of the Fermi distribution
function with the dI/… Because we use the dI/dV curve at 20 mK as the zero-temperature data, our …

[HTML][HTML] Cu2O/CuO Bilayered Composite as a High-Efficiency Photocathode for Photoelectrochemical Hydrogen Evolution Reaction

Y Yang, D Xu, Q Wu, P Diao - Scientific reports, 2016 - nature.com
Solar powered hydrogen evolution reaction (HER) is one of the key reactions in solar-to-chemical
energy conversion. It is desirable to develop photocathodic materials that exhibit high …

[HTML][HTML] Calcium-independent and 1, 25 (OH) 2D3-dependent regulation of the renin-angiotensin system in 1α-hydroxylase knockout mice

C Zhou, F Lu, K Cao, DI Xu, D Goltzman, D Miao - Kidney international, 2008 - Elsevier
To determine whether the cardiovascular effect of 1,25(OH) 2 D is dependent on calcium
and/or phosphorus, mice with targeted deletion of the 25(OH)D 1α-hydroxylase and their wild-…