scholarly journals Critical factors affecting life cycle assessments of material choice for vehicle mass reduction

2017 ◽  
Vol 56 ◽  
pp. 241-257 ◽  
Author(s):  
Troy Hottle ◽  
Cheryl Caffrey ◽  
Joseph McDonald ◽  
Rebecca Dodder
Keyword(s):  
Life Cycle ◽  
Mass Reduction ◽  
Critical Factors ◽  
Life Cycle Assessments ◽  
Factors Affecting ◽  
Vehicle Mass ◽  
Material Choice

Pb-Free Synthesis: Decision Matrix as a Tool for Alloy Selection

2010 ◽  
Vol 7 (1) ◽  
pp. 25-34
Author(s):  
Pedro O. Quintero ◽  
Ricky Valentín ◽  
David Ma
Keyword(s):  
Life Cycle ◽  
Selection Process ◽  
Aerospace Industry ◽  
Electronics Industry ◽  
Critical Factors ◽  
Decision Matrix ◽  
Factors Affecting

For aerospace products, there is no current legislation or directive that sets a schedule for transitioning to Pb-free electronics; however, the aerospace industry is likely to be swept along because of its dependence on the larger commercial electronics industry which has already changed its materials, components, and assemblies to Pb-free. In this article, we present a synthesis of Pb-free solders along with critical factors affecting selection and deployment. A decision matrix methodology is introduced as a valuable tool to assist the alloy selection process based on specific criteria and life cycle conditions.

scholarly journals Exploring the Critical Factors, the Online Learning Continuance Usage during COVID-19 Pandemic

2021 ◽  
Vol 13 (10) ◽  
pp. 5471
Author(s):  
Chuan-Yu Mo ◽  
Te-Hsin Hsieh ◽  
Chien-Liang Lin ◽  
Yuan Qin Jin ◽  
Yu-Sheng Su
Keyword(s):  
Online Learning ◽  
Technology Acceptance ◽  
Family Support ◽  
Technology Acceptance Model ◽  
Online Teaching ◽  
Ease Of Use ◽  
Critical Factors ◽  
Factors Affecting ◽  
E Learning ◽  
Acceptance Model

In order to enable online learning to continue developing when the COVID-19 pandemic passes, this study aimed to identify the critical factors that affected the use of e-learning by university students during the pandemic. These critical factors will help to increase the efficiency of future development and deployment of online learning systems. Through a literature review, this study employed the technology acceptance model, social support, and task–technology fit as the theoretical basis to establish the framework of the online learning environment with regards to the technology acceptance model in the context of emergency management. A questionnaire survey was administered to students in universities that had implemented online teaching during the pandemic, and 552 valid responses were collected. The survey explored the factors affecting the willingness of higher education institution students to continue using online learning, and the following conclusions were drawn. (1) The easier an online learning platform was to navigate, the better it was perceived by the students, and thus the students were more willing to use it. (2) Ease of use and usefulness were associated with the teachers’ choice of platform and their ability to achieve a satisfactory fit between the course design and platform navigation, which thereby affected the students’ learning outcomes and attitude towards use. (3) The positive attitude of teachers towards teaching increased the students’ perceived ease of use of online learning. (4) During the pandemic, family support—a major support for teachers in online teaching—enhanced teachers’ attitudes towards, and willingness to provide, online teaching. A high level of support showed that the parents urged the students to learn and complete online learning tasks as instructed by the teachers, implying that family support could affect the students’ habits towards, adaptation to, and identification of online learning. The study results provide insights into the factors affecting the willingness of teachers and students to continue using e-learning platforms.

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