Mechanical properties of bioactive glasses, glass-ceramics and composites

1998 ◽  
Vol 212 (2) ◽  
pp. 127-136 ◽  
Author(s):  
I D Thompson ◽  
L L Hench
Keyword(s):  
Mechanical Properties ◽  
Quality Index ◽  
Glass Ceramics ◽  
Primary Concern ◽  
High Modulus ◽  
Bioactive Glasses ◽  
Research Directions ◽  
The Past ◽  
New Research ◽  
Carrier Systems

The application of bioactive glass and glass-ceramics has been widely documented over the past twenty years but the high modulus and low fracture toughness has made them less applicable for clinical, load bearing, applications. The development of non-resorbable polyethylene and poly-sulphone matrices for these materials has improved the mechanical properties. However, the primary concern of whether the bioactivity of the composites is reduced is still unresolved. The more recent development of resorbable carrier systems, dextran and collagen, for bioactive glasses does not introduce such problems, hence making this form of composite suitable for novel soft tissue applications. The development of a simple quality index has enabled some of the materials described within this paper to be ranked by their ability to replace bone, thus enabling possible new research directions to be emphasized.

Iteration Theory: Dynamical Systems and Functional Equations

2003 ◽  
Vol 13 (07) ◽  
pp. 1627-1647 ◽  
Author(s):  
F. Balibrea ◽  
L. Reich ◽  
J. Smítal
Keyword(s):  
Dynamical Systems ◽  
Functional Equations ◽  
Discrete Dynamical Systems ◽  
Iteration Theory ◽  
Open Problems ◽  
Research Directions ◽  
The Past ◽  
New Research

The aim of this paper is to give an account of some problems considered in the past years in the setting of Discrete Dynamical Systems and Iterative Functional Equations, some new research directions and also state some open problems.

The Changing Field of Sports History in Australasia

2017 ◽  
Author(s):  
Gary Osmond
Keyword(s):  
Research Directions ◽  
Sports History ◽  
Popular Discourse ◽  
Substantial Growth ◽  
The Past ◽  
Australian Rules Football ◽  
Scholarly Discussion ◽  
Formed Part ◽  
New Research ◽  
Cultural Turn

This chapter focuses on sport historiography in Australia and New Zealand, with three broad aims: to survey historic and historiographic developments, to consider the historiographical predominance of team ball sports, and to chart new and emerging directions. While sport had long formed part of popular discourse in both countries, in the 1980s historians began to analyze sport comprehensively, and the decades since have witnessed a substantial growth in sports historiography produced by academic scholars. Research has had a particular focus on certain sports, especially cricket, rugby, and Australian Rules football, which has been problematic in terms of its exclusivity and yet generative of important scholarly discussion and debate. New research directions, especially those emerging from an increased engagement with the cultural turn in the past decade, have yielded important studies into the fields of affect, bodies, materiality, visuality, and other areas new or rare in sports history.

Mechanical properties of bioactive glasses, ceramics, glass-ceramics and composites: State-of-the-art review and future challenges

2019 ◽  
Vol 104 ◽  
pp. 109895 ◽  
Author(s):  
Gurbinder Kaur ◽  
Vishal Kumar ◽  
Francesco Baino ◽  
John C. Mauro ◽  
Gary Pickrell ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
State Of The Art ◽  
Glass Ceramics ◽  
Bioactive Glasses ◽  
Future Challenges

scholarly journals Using the Problem-Based Learning in STEM Teaching About Bamboo Toothpick Houses

2020 ◽  
Vol 13 (12) ◽  
pp. 70
Author(s):  
Ngoc-Giang Nguyen
Keyword(s):  
Teaching Methods ◽  
Problem Based Learning ◽  
Research Process ◽  
Ho Chi Minh City ◽  
Research Directions ◽  
Cooperative Teaching ◽  
The Past ◽  
International College ◽  
New Research ◽  
Stem Teaching

In Vietnam, there are currently stable and comprehensive innovations in the field of education. Educational scientists have shifted from knowledge-focused teaching to competency teaching. Since then, there have been more new research directions in teaching than in the past, such as integrated teaching, practical application of mathematics and STEM teaching, etc. In these directions, STEM teaching is a new and broad topic. In particular, there are many teaching methods used in STEM teaching. Some people use project teaching, some use discovery teaching, and some others use cooperative teaching methods. Through the research process, we found that STEM is an integrated area, so we should choose one of the most appropriate ways to approach it. That is a problem-based learning method. How does STEM teaching work with problem-based learning? To illustrate this STEM teaching work, we will use the design and implementation of the model of a bamboo toothpick house at Ho Chi Minh City International College.

scholarly journals RECENT DEVELOPMENTS IN DYNAMICAL SYSTEMS: THREE PERSPECTIVES

2010 ◽  
Vol 20 (09) ◽  
pp. 2591-2636 ◽  
Author(s):  
F. BALIBREA ◽  
T. CARABALLO ◽  
P. E. KLOEDEN ◽  
J. VALERO
Keyword(s):  
Dynamical Systems ◽  
Open Problems ◽  
Research Directions ◽  
Present Account ◽  
The Past ◽  
Recent Developments ◽  
New Research

This paper aims to an present account of some problems considered in the past years in Dynamical Systems, new research directions and also provide some open problems.

scholarly journals All’s well? Comparing on- and off-site pollen samples and exploring the potential of pollen from man-made contexts

2019 ◽  
Vol 29 (2) ◽  
pp. 125-131 ◽  
Author(s):  
Yvonne F. van Amerongen
Keyword(s):  
The Netherlands ◽  
Bronze Age ◽  
Pollen Analysis ◽  
Forest Cover ◽  
Research Directions ◽  
The Past ◽  
Time Period ◽  
Pollen Traps ◽  
Preservation Conditions ◽  
New Research

Abstract Pollen analysis has long been used as a tool to make an assessment of regional vegetation. On-site pollen samples are taken for the same purpose at some excavations, because they are often the only available contexts with good preservation conditions. This paper shows that the analysis of on- and off-site pollen samples from the same region (West Frisia, the Netherlands) and time period (Dutch Bronze Age; ca. 2000–800 bc) can give very conflicting results on the type and amount of regional vegetation, in this case forest cover. Reasons for this discrepancy are discussed in relation to the use of on-site contexts by people in the past, as well as their location within a settlement. Furthermore, the potential of these contexts for the assessment of locally performed subsistence-related activities is outlined. New research directions are required to test this potential, so that wells and other man-made pollen traps can become a valuable future tool for reconstructing the past.

Autonomous self-healing polyisoprene elastomers with high modulus and good toughness based on the synergy of dynamic ionic crosslinks and highly disordered crystals

2020 ◽  
Vol 11 (41) ◽  
pp. 6549-6558
Author(s):  
Yohei Miwa ◽  
Mayu Yamada ◽  
Yu Shinke ◽  
Shoichi Kutsumizu
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Self Healing ◽  
High Modulus ◽  
Disordered Crystals ◽  
Ionic Crosslinks

We designed a novel polyisoprene elastomer with high mechanical properties and autonomous self-healing capability at room temperature facilitated by the coexistence of dynamic ionic crosslinks and crystalline components that slowly reassembled.

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