An Introduction to the Impact Behaviour of Polymer Composites Using Simplified Beam Models

1998 ◽  
Vol 26 (2) ◽  
pp. 89-110 ◽  
Author(s):  
R. A. W. Mines
Keyword(s):  
Composite Materials ◽  
Undergraduate Students ◽  
Progressive Collapse ◽  
Structural Response ◽  
Sandwich Beams ◽  
Three Point Bending ◽  
The Past ◽  
Structural Case ◽  
The University ◽  
The Impact

The paper describes a final-year undergraduate course that has been taught at the University of Liverpool for the past three years. The main aims of the course are to introduce the student to the design of structures using multi-component (composite) materials and to the performance of such structures under impact loading. Given the complexity of generalized composite behaviour and of structural crashworthiness, a simple structural case is considered, namely, a beam subject to three-point bending. A feature of the course is that not only is linear structural response considered but also non-linear (progressive) structural collapse is covered. The course is split into four parts, namely: (i) analysis of composite laminae, (ii) analysis of laminated beams, (iii) local and global effects in sandwich beams, and (iv) post-failure and progressive collapse of sandwich beams. Static and impact loadings are considered. Comments are made on how the theories are simplified and communicated to the undergraduate students.

Static and dynamic response of sandwich beams with lattice and pantographic cores

2021 ◽  
pp. 109963622110338
Author(s):  
Yury Solyaev ◽  
Arseniy Babaytsev ◽  
Anastasia Ustenko ◽  
Andrey Ripetskiy ◽  
Alexander Volkov
Keyword(s):  
Mechanical Performance ◽  
Lattice Structure ◽  
Unit Length ◽  
Experimental Tests ◽  
Plane Geometry ◽  
Sandwich Beams ◽  
Static Tests ◽  
Three Point Bending ◽  
The Core ◽  
The Impact

Mechanical performance of 3d-printed polyamide sandwich beams with different type of the lattice cores is investigated. Four variants of the beams are considered, which differ in the type of connections between the elements in the lattice structure of the core. We consider the pantographic-type lattices formed by the two families of inclined beams placed with small offset and connected by stiff joints (variant 1), by hinges (variant 2) and made without joints (variant 3). The fourth type of the core has the standard plane geometry formed by the intersected beams lying in the same plane (variant 4). Experimental tests were performed for the localized indentation loading according to the three-point bending scheme with small span-to-thickness ratio. From the experiments we found that the plane geometry of variant 4 has the highest rigidity and the highest load bearing capacity in the static tests. However, other three variants of the pantographic-type cores (1–3) demonstrate the better performance under the impact loading. The impact strength of such structures are in 3.5–5 times higher than those one of variant 4 with almost the same mass per unit length. This result is validated by using numerical simulations and explained by the decrease of the stress concentration and the stress state triaxiality and also by the delocalization effects that arise in the pantographic-type cores.

scholarly journals The Impact of Embedded iPad Use on Student Perceptions of Their Digital Capabilities

2018 ◽  
Vol 8 (3) ◽  
pp. 102 ◽  
Author(s):  
Matt Elphick
Keyword(s):  
Student Perceptions ◽  
Undergraduate Students ◽  
Positive Impact ◽  
Student Body ◽  
Learning And Teaching ◽  
Digital World ◽  
Key Skills ◽  
The University ◽  
Teaching In Higher Education ◽  
The Impact

Digital capabilities are recognized as key skills that students must possess to learn and work in our increasingly digital world and have been the subject of a growing focus over recent years. Similarly, smartphones and, to a lesser degree, tablets are now ubiquitous within the student body, and many academics are beginning to leverage these devices for the purposes of learning and teaching in higher education. To further explore the possibilities of mobile technology, the iPilot project was created to explore the effects that embedded iPad use had on undergraduate students’ creativity, ability to collaborate with their peers and their perception of their digital capabilities. Focusing on the digital capabilities aspect of the project, this paper explores the results gathered. While the results are mixed, when combined with data taken from the Joint Information Systems Committee (JISC) Digital Experience Tracker, it does appear that using iPads in the university classroom can have a positive impact on certain digital behaviors and students’ perceptions of their digital skills.

Radiocarbon Dates and New World Chronology

Antiquity ◽  
1961 ◽  
Vol 35 (140) ◽  
pp. 286-291 ◽  
Author(s):  
Geoffrey Bushnell
Keyword(s):  
Radiocarbon Dating ◽  
New World ◽  
Radiocarbon Dates ◽  
The Past ◽  
University Of Cambridge ◽  
The University ◽  
The Impact

It is a commonplace of current archaeology that the publication of radiocarbon dates is revolutionizing our ideas of the past. Dr G. H. S. Bushnell, Curator of the Museum of Archaeology and Ethnology in the University of Cambridge, England, has already published in ANTIQUITY and elsewhere some of his views on the impact of radiocarbon dating on New World chronology. Here he studies the whole problem in detail. He adopts the useful convention of referring to a date already fully published in the Radiocarbon Supplement to the American Journal of Science simply by its laboratory designation and number {thus K-554 is reading no. 554 of the Copenhagen Laboratory), but in some cases, where the date is not fully published, he gives fuller information.

scholarly journals Reclaiming Our Time: A 21st-Century Response to Banks’ “Afro-American Scholars in the University”

2018 ◽  
Vol 55 (2) ◽  
pp. 238-266
Author(s):  
Richard J. Reddick
Keyword(s):  
Urban Education ◽  
Affirmative Action ◽  
Predominantly White ◽  
Predominantly White Institutions ◽  
Black Faculty ◽  
The Past ◽  
White Institutions ◽  
Urban Educators ◽  
The University ◽  
The Impact

William Banks’ 1984 article “Afro-American Scholars in the University” situated Black faculty at predominantly White institutions in a milieu noting the uses and misuses of Black scholars, constituencies in conflict, the range of responses from Black scholars, and the standards and realities for their advancement in academia. Banks further discussed the stigma of affirmative action and the burden of symbolism for Black faculty. This article, written in the #BlackLivesMatter and Trump era, engages with the same questions that Banks raised 34 years prior. This response expands the context to the field of urban education, and Black urban educators in the academy particularly, through an analysis of community engagement experiences, the burdens of cultural taxation, and the impact of affirmative action in a post-Fisher political context. Incorporating events both inside and outside of academia, the author considers the centrality of creating spaces of resistance and leveraging the gains for Black academics over the past three decades to alter the standards of the academy to support Black scholars and their allies.

scholarly journals Pathways from Food Insecurity to Health Outcomes among California University Students

Nutrients ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1419 ◽  
Author(s):  
Suzanna M. Martinez ◽  
Michael A. Grandner ◽  
Aydin Nazmi ◽  
Elias Ruben Canedo ◽  
Lorrene D. Ritchie
Keyword(s):  
College Students ◽  
Food Insecurity ◽  
Undergraduate Students ◽  
Weight Status ◽  
Online Survey ◽  
Student Characteristics ◽  
Poor Health ◽  
Self Rated Health ◽  
The Past ◽  
The Impact

The prevalence of food insecurity (FI) among college students is alarmingly high, yet the impact on student health has not been well investigated. The aim of the current study was to examine the simultaneous relationships between food insecurity and health-related outcomes including body mass index (BMI) and overall health in a college student population. Randomly sampled students in the University of California 10 campus system were invited to participate in an online survey in spring 2015. The analytic sample size was 8705 graduate and undergraduate students. Data were collected on FI in the past year, daily servings of fruits and vegetables (FV), number of days in the past week of enough sleep and moderate- to vigorous-intensity physical activity (MVPA), height and weight, self-rated health, and student characteristics. Using path analysis, mediated pathways between FI, BMI, and poor health were examined through FV intake, number of days of MVPA and enough sleep. Analyses controlled for student characteristics. Mean BMI was 23.6 kg/m2 (SD, 5.0), and average self-rated health was good. FI was directly and indirectly related to higher BMI and poor health through three pathways. First, FI was related to fewer days of enough sleep, which in turn was related to increased BMI and poor health. Second, FI was related to fewer days of MVPA, which in turn was related to increased BMI and poor health. Third, FI was related to fewer daily servings of FV, which in turn was related to poor health. FI is associated with poor health behaviors among college students, which may contribute to higher weight status and poor health. These findings highlight the importance of food security for a healthy college experience.

scholarly journals Design, implementation, and assessment of an interactive simulation to teach undergraduate immunology students hemolytic disease of the newborn

2021 ◽  
Vol 45 (2) ◽  
pp. 299-306
Author(s):  
Maurizio Costabile
Keyword(s):  
Student Learning ◽  
Student Performance ◽  
Undergraduate Students ◽  
South Australia ◽  
Interactive Simulation ◽  
Hemolytic Disease ◽  
The University ◽  
The Impact ◽  
Interactive Simulations ◽  
Blood Grouping

Hemolytic disease of the newborn (HDN) is a potentially fatal condition caused by a Rhesus (Rh) antigen incompatibility between a mother and fetus. As a result, determining the Rh status of expectant parents is a routine clinical assessment. Both the physiological and immunological basis of this condition are taught to undergraduate students. At the University of South Australia, some undergraduate immunology students find this topic challenging. The author designed, implemented, and assessed the impact of an interactive simulation to facilitate student learning of HDN. The students were actively engaged in determining the blood grouping and Rh status of an expectant mother and father and then determining the possibility of developing HDN. The simulation was found to take only 15 min to complete yet led to a significant increase in student performance in an end of semester exam question. Student perceived understanding was found to significantly improve following the introduction of the simulation, even though the content had been covered in a formal lecture. Student feedback was highly positive of this learning approach. In conclusion, short, interactive simulations can be used effectively to enhance student learning of challenging concepts.

A Canadian University “Understanding Foods” Course Improves Confidence in Food Skills and Food Safety Knowledge

2018 ◽  
Vol 79 (4) ◽  
pp. 170-175 ◽  
Author(s):  
Jessica Bertrand ◽  
Alison Crerar ◽  
Janis Randall Simpson
Keyword(s):  
Food Safety ◽  
Undergraduate Students ◽  
Eating Habits ◽  
Grocery Shopping ◽  
Convenience Sample ◽  
Undergraduate Level ◽  
Hands On ◽  
The University ◽  
Safety Knowledge ◽  
The Impact

The impact of a hands-on foods course on undergraduate students’ food skills was examined at the University of Guelph. For a convenience sample, first- and second-year students (n = 47, 87% female) registered in the “Understanding Foods” course were recruited to participate in a survey administered on Qualtrics at the beginning of the semester and again at the end of the semester. Participants were asked questions related to demographics and food habits; additional questions on food skills, in Likert-scale format, included confidence in food preparation, food safety knowledge, and grocery shopping habits. Subscales were combined for an overall Food Skills Questions (FSQ) score and differences were determined by paired t tests. Overall, significant (P < 0.05) improvements were observed related to students’ confidence and food safety knowledge scores as well as the overall FSQ score. Students, however, rated their personal eating habits more poorly (P < 0.05) at the end of the semester. As a lack of food skills is often considered a barrier for healthy eating among students, these results signify the importance of a hands-on introductory cooking course at the undergraduate level.

scholarly journals The Impact Of Integration, Affirmative Action, And Diversity On Minority Student Recruitment At The University Of Alabama: A Longitudinal Perspective

2006 ◽  
Vol 1 (2) ◽  
pp. 25-34
Author(s):  
John L. Festervand ◽  
Troy A. Festervand
Keyword(s):  
Higher Education ◽  
Affirmative Action ◽  
Minority Student ◽  
Minority Faculty ◽  
University Of Alabama ◽  
Minority Representation ◽  
The Past ◽  
Diversity In Higher Education ◽  
The University ◽  
The Impact

This paper explores the University of Alabama's positions, actions, policies, and accomplishments over the past forty years with respect to minority representation among its students and faculty. The impact and progression of these initiatives by the University of Alabama demonstrates strides have been made. The paper also examines the University's recruiting efforts to attract more minority faculty and students. The transition from integration to affirmative action to diversity in higher education also are examined.

scholarly journals The Impact Of ICTs In Education: The Case Of University Of Macedonia Students

2008 ◽  
Vol 4 (3) ◽  
pp. 29-34 ◽  
Author(s):  
Areti Valasidou ◽  
Despoina Bousiou-Makridou
Keyword(s):  
Information And Communication Technology ◽  
Undergraduate Students ◽  
Communication Technology ◽  
Male Students ◽  
Administrative Personnel ◽  
Political Studies ◽  
Information And Communication ◽  
Students Attitudes ◽  
The University ◽  
The Impact

The aim of this paper is to describe the results of a research that took place in order to examine the opinion and impact of Information and Communication Technology to undergraduate students of University of Macedonia. The research was conducted with two main purposes. The first purpose is to investigate how familiar are the students of international and political studies with the use of ICTs on and off campus. The second purpose of the research is to examine the possible relationship between the use of ICTs and the gender and the students performance (marks) at the Introduction to Computers module that is part of their programme of studies. The results revealed that male students are more favourable toward ICT usage and the students that scored high at the module Introduction to Computers were more likely to find that the use of ICTs help them at their studies with various ways. The university academic and administrative personnel is highly recommended to find ways in order the students to be motivated and maintain positive students attitudes to use ICTs. Thus, the students will find it very helpful during their studying or even a supplement to other teaching activities.

scholarly journals How far is too far? An analysis of students’ perceptions of the impact of distance between university and family home on academic performance

2017 ◽  
Vol 10 (15) ◽  
pp. 28-40
Author(s):  
Rosalina Pisco Costa ◽  
Carlos Vieira ◽  
Isabel Vieira
Keyword(s):  
Academic Performance ◽  
Undergraduate Students ◽  
Online Survey ◽  
Negative Impact ◽  
Two Dimensions ◽  
Family Home ◽  
Socially Relevant ◽  
The University ◽  
Work Done ◽  
The Impact

AbstractTransition to university is a challenging phase in youngsters’ lives. The literature indicates that geographical distance separating the places of study and of family residence adds to the difficulties of transition and adjustment to university. Recent evidence suggests that it also negatively impacts students’ grades. Despite important work done by economists, geographers and psychologists, sociology has devoted scarce interest in understanding this topic. This article seeks to bridge this gap, specifically exploring the reasons justifying the largely ignored effect of distance between the university and family home in academic performance. The study draws on data on undergraduate students of a Portuguese public university, collected through an online survey. Two dimensions, one more related to practical life occupations and another more linked to personal feelings and activities, are examined. It is argued that the negative impact of distance is mainly due to homesickness and to the time spent traveling home. Results from such analysis are twofold socially relevant: of the utmost importance for families, academics and students’ support services, deserve to be seriously considered by policy makers deciding on the territorial distribution of higher-education institutions.

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