Dynamic stochastic crack growth in composites - A challenge to the research community

2000 ◽  
Author(s):  
Giora Maymon
Keyword(s):  
Crack Growth ◽  
Research Community ◽  
Dynamic Stochastic

Examination of Fracture Interfaces in Silicon Nitride

1975 ◽  
Vol 33 ◽  
pp. 60-61
Author(s):  
Nancy J. Tighe
Keyword(s):  
Silicon Nitride ◽  
Grain Boundary ◽  
Crack Growth ◽  
Subcritical Crack Growth ◽  
Slow Crack Growth ◽  
Ceramic Materials ◽  
Grain Boundary Sliding ◽  
Boundary Phase ◽  
Turbine Engines ◽  
Boundary Sliding

Silicon nitride is one of the ceramic materials being considered for the components in gas turbine engines which will be exposed to temperatures of 1000 to 1400°C. Test specimens from hot-pressed billets exhibit flexural strengths of approximately 50 MN/m2 at 1000°C. However, the strength degrades rapidly to less than 20 MN/m2 at 1400°C. The strength degradition is attributed to subcritical crack growth phenomena evidenced by a stress rate dependence of the flexural strength and the stress intensity factor. This phenomena is termed slow crack growth and is associated with the onset of plastic deformation at the crack tip. Lange attributed the subcritical crack growth tb a glassy silicate grain boundary phase which decreased in viscosity with increased temperature and permitted a form of grain boundary sliding to occur.

High-voltage Electron Microscopy: Where it is and where it may be going

1995 ◽  
Vol 53 ◽  
pp. 80-81
Author(s):  
Charles W. Allen
Keyword(s):  
Electron Microscopy ◽  
High Voltage ◽  
Construction Cost ◽  
Research Community ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
High Voltage Electron ◽  
Materials Research

High voltage TEMs were introduced commercially thirty years ago, with the installations of 500 kV Hitachi instruments at the Universities of Nogoya and Tokyo. Since that time a total of 51 commercial instruments, having maximum accelerating potentials of 0.5-3.5 MV, have been delivered. Prices have gone from about a dollar per volt for the early instruments to roughly twenty dollars per volt today, which is not so unreasonable considerinp inflation and vastly improved electronics and other improvements. The most expensive HVEM (the 3.5 MV instrument at Osaka University) cost about 5 percent of the construction cost of the USA's latest synchrotron.Table 1 briefly traces the development of HVEM in this country for the materials sciences. There are now only three available instruments at two sites: the 1.2 MeV HVEM at Argonne National Lab, and 1.0 and 1.5 MeV instruments at Lawrence Berkeley National Lab. Fortunately, both sites are user facilities funded by DOE for the materials research community.

Behavioral and emotional differences between children of divorce and children from intact families: Clinical significance and mediating processes *This study is part of a dissertation () supported from the German research community.

2002 ◽  
Vol 61 (1) ◽  
pp. 5-14 ◽  
Author(s):  
Andreas Schick
Keyword(s):  
Self Esteem ◽  
Research Community ◽  
Children Of Divorce ◽  
Group Differences ◽  
Significant Group ◽  
Intact Families ◽  
Divorce Adjustment ◽  
Theoretical Assumptions ◽  
German Research ◽  
Clinically Significant

The following study is based on a sample of 241 9-13-year-old children (66 children from divorced parents, 175 children from non divorced parents). They were examined for differences regarding anxiety, self-esteem, different areas of competence, and degree of behavior problems. With a focus on the children’s experiences, the clinically significant differences were examined. Clinically significant differences, revealing more negative outcomes for the children of divorce, were only found for social anxiety and unstable performance. The frequency of clinical significant differences was independent of the length of time the parents had been separated. The perceived destructiveness of conflict between the parents one of four facets of interparental conflict in this study functioned as a central mediator of the statistically significant group differences. The children’s perception of the father’s social support was a less reliable indicator of variance. Further studies should try to make underlying theoretical assumptions about the effects of divorce more explicit, to distinguish clearly between mediating variables, and to investigate them with respect to specific divorce adjustment indicators.

A discrete dislocation analysis of fatigue crack growth

2001 ◽  
Vol 11 (PR5) ◽  
pp. Pr5-69-Pr5-75
Author(s):  
V. S. Deshpande ◽  
H. H.M. Cleveringa ◽  
E. Van der Giessen ◽  
A. Needleman
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Discrete Dislocation

Framework for Biosignal Interpretation in Intensive Care and Anesthesia

1997 ◽  
Vol 36 (04/05) ◽  
pp. 340-344 ◽  
Author(s):  
I. Korhonen ◽  
M. van Gils ◽  
A. Kari ◽  
N. Saranummi
Keyword(s):  
Critical Care ◽  
Intensive Care ◽  
Data Management ◽  
Clinical Evaluation ◽  
Patient Monitoring ◽  
Research Community ◽  
Clinical Routine ◽  
The Poor ◽  
Outcomes Of Care

Abstract:Improved monitoring improves outcomes of care. As critical care is “critical”, everything that can be done to detect and prevent complications as early as possible benefits the patients. In spite of major efforts by the research community to develop and apply sophisticated biosignal interpretation methods (BSI), the uptake of the results by industry has been poor. Consequently, the BSI methods used in clinical routine are fairly simple. This paper postulates that the main reason for the poor uptake is the insufficient bridging between the actors (i.e., clinicians, industry and research). This makes it difficult for the BSI developers to understand what can be implemented into commercial systems and what will be accepted by clinicians as routine tools. A framework is suggested that enables improved interaction and cooperation between the actors. This framework is based on the emerging commercial patient monitoring and data management platforms which can be shared and utilized by all concerned, from research to development and finally to clinical evaluation.

Section 6.a Introduction

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Rebecca PRICE ◽  
Christine DE LILLE ◽  
Cara WRIGLEY ◽  
Kees DORST
Keyword(s):  
Case Studies ◽  
Organizational Leadership ◽  
Research Community ◽  
Design Management ◽  
Management Research ◽  
Research Methodologies ◽  
Organizational Research ◽  
Research Perspectives ◽  
Rapid Changes

There is an increasing need for organizations to adapt to rapid changes in society. This need requires organizations’ and the leader within them, to explore, recognize, build and exploit new capabilities. Researching such capabilities has drawn attention from the design management research community in recent years. Dominantly, research contributions have focused on perspectives of innovation and the strategic application of design with the researcher distanced from context. Descriptive and evaluative case studies of past organizational leadership have been vital, by building momentum for the design movement. However, there is a need now to progress toward prescriptive and explorative research perspectives that embrace context through practice and the simultaneous research of design.  Therefore, the aim of this track is to lead and progress discussion on research methodologies that support the research community in developing explorative and prescriptive research methodologies for context-orientated organizational research. This track brings together a group of diverse international researchers and practitioners to fuel discussion on design approaches and subsequent outcomes of prescriptive and explorative research methodologies.

EDITORIAL

1970 ◽  
Vol 1 (1) ◽  
pp. i-iv
Author(s):  
A K M A Islam
Keyword(s):  
Environmental Science ◽  
Academic Career ◽  
Scientific Research ◽  
Editorial Policy ◽  
Research Community ◽  
Hard Copy ◽  
Original Research ◽  
Scientific Publications ◽  
Advisory Boards

Journal of Scientific Research EDITORIAL Do we need a new journal? The answer lies in the fact that currently no international journal (online and print) with interdisciplinary character which specifically caters to the academic needs of the international community operates from Bangladesh. This journal aims to fill this lacuna and to be a bridge for the scientists from the east and the west. This is the first issue of the Journal of Scientific Research (JSR). The idea of launching a journal that hopes to publish quality scientific works was planted in early 2008 during a science faculty meeting at Rajshahi University. Now it is our pleasure to see the idea blossom into the first issue of first volume (1 January 2009) that contains scientific work not only of Asian regions but of much beyond that. The inaugural issue indicates the type of journal we hope to become. It is wide ranging and interdisciplinary. Our contributors include scholars at every stage of their academic career. As regards editorial policy and scope the Journal of Scientific Research is a peer-reviewed international journal originally intended for publication annually. But due to a satisfactory flow of manuscripts since the first announcements the publication frequency has now been increased to 3 online issues (one print volume) per year.The journal is a unifying force, going across the barriers between disciplines, addressing all related topics and materials. An international Editorial Board (along with an Advisory Board) comprising of renowned academics from various fields guides our editorial policy and direction. The journal is devoted to the publication of original research (research paper, review paper, short communication) covering the following fields:Section A:  Physical and Mathematical Sciences: Physics, Mathematics, Statistics, Geophysics, Computer, Environmental Science, Communications and Information Technology, Engineering and related branches.Section B:  Chemical and Biological Sciences: Chemistry, Biochemistry, Pharmacy, Biology, Genetics, Fisheries and related branches.The articles selected for the first issue have been reviewed by two discipline-specialists, and their recommendations have been appropriately incorporated. Submissions from the world research community are encouraged to fulfill our mission and aim for the journal to stand for the international scientific publishing standards.    It was clear during the planning and development of this first issue that the Asian region needs a forum through which research could be shared and acknowledged. I hope that this journal will soon be recognised by the wider research community as their forum for the dissemination of knowledge. We hope that the journal will not simply act as a place for publication of material, though obviously this is important, but should act as a catalyst for the advancement of science both within and outside the region.The journal is being published both online and in print. Online publishing, unique in nature, is faster and far less expensive than traditional hard copy publishing. Access of online journals is easier and better images, storage and multimedia are other advantages. I must thank the International Network for the availability of Scientific Publications (INASP) for helping us publish via BanglaJOL – and the help of Ms. Sioux Cumming in this regard is worthy of mention.The success of a journal depends on the quality of its Editorial Board and the reviewers. The effort that I have seen from them speaks well for the future of the new born journal.  Both the Editorial and Advisory Boards should deserve thanks for their indispensable advice and support during the planning phases of the journal. I should also thank the reviewers who contributed their valuable time to complete reviews within a reasonable time. I truly hope that the diversity contained in this first issue of the journal will be the hallmark of future issues. A K M A Islam email: [email protected]  website: www.banglajol.info/index.php/JSR           © 2009 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.DOI: 10.3329/jsr.vlil.1703    

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