scholarly journals Self-Healing Materials Systems: Overview of Major Approaches and Recent Developed Technologies

2012 ◽  
Vol 2012 ◽  
pp. 1-17 ◽  
Author(s):  
B. Aïssa ◽  
D. Therriault ◽  
E. Haddad ◽  
W. Jamroz
Keyword(s):  
Multidisciplinary Approach ◽  
Product Safety ◽  
Self Healing ◽  
Metallic Materials ◽  
Exciting Field ◽  
Engineering Applications ◽  
Polymeric Systems ◽  
The Past ◽  
Improve Product ◽  
Thermosetting Composite

The development of self-healing materials is now being considered for real engineering applications. Over the past few decades, there has been a huge interest in materials that can self-heal, as this property can increase materials lifetime, reduce replacement costs, and improve product safety. Self-healing systems can be made from a variety of polymers and metallic materials. This paper reviews the main technologies currently being developed, particularly on the thermosetting composite polymeric systems. An overview of various self-healing concepts over the past decade is then presented. Finally, a perspective on future self-healing approaches using this biomimetic technique is offered. The intention is to stimulate debate and reinforce the importance of a multidisciplinary approach in this exciting field.

Self-Healing Materials Systems as a Way for Damage Mitigation in Composites Structures Caused by Orbital Space Debris

2014 ◽  
pp. 1-25
Author(s):  
Brahim Aïssa ◽  
Maha Mohamed Khayyat
Keyword(s):  
Functional Materials ◽  
Low Earth Orbit ◽  
Earth Orbit ◽  
Self Healing ◽  
Metallic Materials ◽  
Exciting Field ◽  
Structural Requirement ◽  
The Past ◽  
Orbital Space ◽  
Service Degradation

The presence in space of orbital debris, particularly in low earth orbit, presents a continuous hazard to orbiting satellites and spacecrafts. The development of self-healing materials offers the designer an ability to incorporate secondary functional materials capable of counteracting service degradation whilst still achieving the primary, usually structural, requirement. This chapter reviews the various self-healing technologies currently being developed. Self-healing systems can be made from a variety of polymers and metallic materials. An overview of various self-healing concepts over the past two decades is presented. Finally, a perspective on current and future self-healing approaches using this biomimetic technique is offered. The intention is to stimulate debate and reinforce the importance of a multidisciplinary approach in this exciting field.

Autonomic Healing of Polymers

MRS Bulletin ◽  
2008 ◽  
Vol 33 (8) ◽  
pp. 766-769 ◽  
Author(s):  
Scott R. White ◽  
Mary M. Caruso ◽  
Jeffrey S. Moore
Keyword(s):  
Time Frame ◽  
Advanced Materials ◽  
Self Healing ◽  
Technological Advancement ◽  
Practical Application ◽  
Structural Composites ◽  
Materials Development ◽  
Polymeric Systems ◽  
The Past ◽  
Potential Applications

AbstractSelf-healing polymers have experienced rapid technological advancement over the past seven years. They have moved from a conceptual demonstration to practical application in this time frame and have grown from a single design to a generic paradigm for modern materials development. Potential applications of self-healing polymers are quite broad, including microelectronic substrates and encapsulants, polymeric paints and coatings, structural composites, and biomedical devices. In this article, we focus on polymeric systems that heal in an autonomic fashion, that is, automatically and without human intervention. The types of systems under development and the future of this paradigm in advanced materials are discussed.

Nursing considerations for patients undergoing robotic-arm assisted joint replacements

2021 ◽  
Vol 30 (10) ◽  
pp. 580-587
Author(s):  
Ajay Asokan ◽  
Joanna Baawa-Ameyaw ◽  
Babar Kayani ◽  
Ganan T Radhakrishnan ◽  
Ahmed A Magan ◽  
...  
Keyword(s):  
Postoperative Pain ◽  
Nursing Care ◽  
Functional Outcomes ◽  
Multidisciplinary Approach ◽  
Robotic Arm ◽  
Surgical Trauma ◽  
Pragmatic Approach ◽  
Joint Replacements ◽  
The Past ◽  
Implant Positioning

Robotic-arm assisted arthroplasty (RAA) has gained popularity over the past decade because of its ability to provide more accurate implant positioning with less surgical trauma than conventional manual arthroplasty. It has shown better early functional outcomes, less postoperative pain and shorter inpatient stays. A multidisciplinary approach is crucial in improving overall outcomes and ensuring this technology is implemented efficiently and safely, but there is limited published literature on the nursing considerations for managing patients undergoing RAA. This article aims to provide a pragmatic approach for nursing care in the pre-, intra-, and postoperative phases of RAA.

scholarly journals Strengthening Mechanisms of Magnesium-Lithium Based Alloys and Composites

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
C. O. Muga ◽  
Z. W. Zhang
Keyword(s):  
Thermal Treatment ◽  
Dislocation Density ◽  
Thermomechanical Processing ◽  
Precipitation Strengthening ◽  
Strengthening Mechanisms ◽  
Engineering Applications ◽  
The Past ◽  
Treatment Processes ◽  
Solution Strengthening ◽  
Suitable Processing

Mg-Li based alloys are widely applied in various engineering applications. The strength of these alloys is modified and enhanced by different strengthening mechanisms. The strengthening mechanisms of these alloys and their composites have been extensively studied during the past decades. Important mechanisms applied to strengthening the alloys include precipitation strengthening, solution strengthening, grain and subgrain strengthening, and dislocation density strengthening. Precipitation and solution strengthening mechanisms are strongly dependent on composition of the alloys and thermal treatment processes, whereas grain and subgrain and dislocation density strengthening mechanisms majorly depend on thermomechanical processing. In this paper, recent studies on conventional processes for the strengthening of Mg-Li based alloys are summarized as they are critical during the alloys design and processing. Main strengthening mechanisms are objectively reviewed, focusing on their advantages and drawbacks. These can contribute to enhancing, initiating, and improving future researches for alloys design and suitable processing selection.

scholarly journals Histologically Malignant Solitary Fibrous Tumour of the Anterior Thoracic Wall: A Case Report and Review of the Literature

2010 ◽  
Vol 2010 ◽  
pp. 1-4 ◽  
Author(s):  
Maria Archontaki ◽  
Dimitris P. Korkolis ◽  
Niki Arnogiannaki ◽  
Stelios Hatzijiannis ◽  
Panagiotis Dendrinos ◽  
...  
Keyword(s):  
Multidisciplinary Approach ◽  
Postoperative Radiotherapy ◽  
Solitary Fibrous Tumour ◽  
Thoracic Wall ◽  
Soft Tissue Tumour ◽  
Local Behavior ◽  
Review Of The Literature ◽  
The Past ◽  
Tissue Tumour ◽  
Histological Characteristics

Solitary fibrous tumour (SFT) is a rare oncological entity that most often arises in the pleura. Over the past 10 years, the tumour has been described at numerous extrapleural locations. We present the case of a 42-year-old female Caucasian patient with an extrapleural SFT located at the anterior thoracic wall for 22 years, with atypical histological characteristics and clinical features of malignancy. Management consisted of a wide surgical resection, plastic reconstruction, and postoperative radiotherapy. Although extrapleural SFT usually behaves as a benign soft tissue tumour, it can also present with a more aggressive local behavior, including locoregional recurrence or metastasis. In that case, a multidisciplinary approach is required for accurate diagnosis and proper management.

scholarly journals Constitutive Description of Extra Strengthening in Gradient Nanotwinned Metals

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2375
Author(s):  
Wufan Chen ◽  
Panpan Wan ◽  
Qingkun Zhao ◽  
Haofei Zhou
Keyword(s):  
Constitutive Model ◽  
Structural Design ◽  
Work Hardening ◽  
Mechanical Response ◽  
Theoretical Framework ◽  
Deformation Mechanisms ◽  
Strengthening Effect ◽  
Metallic Materials ◽  
Engineering Applications ◽  
Increased Strength

Gradient nanotwinned (GNT) metals exhibit extra strengthening and work hardening behaviors, which endow them impressive potentials in engineering applications. The increased strength is attributed to the dense interactions between dislocations and boundaries in the grain interiors. However, a constitutive model elucidating the extra strengthening effect is currently lacking. Here, we propose a theoretical framework to describe the mechanical response of GNT metals, especially the unusual extra strengthening behavior. The model captures the deformation mechanisms of GNT metals and coincides well with the reported experiment. The constitutive description developed in this work presents a tool to guide the structural design for developing gradient metallic materials.

scholarly journals Self-Healing Materials for Electronics Applications

2022 ◽  
Vol 23 (2) ◽  
pp. 622
Author(s):  
Fouzia Mashkoor ◽  
Sun Jin Lee ◽  
Hoon Yi ◽  
Seung Man Noh ◽  
Changyoon Jeong
Keyword(s):  
Energy Storage ◽  
Composite Materials ◽  
Crack Formation ◽  
Review Article ◽  
Self Healing ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
The Past ◽  
Repair Mechanisms ◽  
Energy Harvesting Devices

Self-healing materials have been attracting the attention of the scientists over the past few decades because of their effectiveness in detecting damage and their autonomic healing response. Self-healing materials are an evolving and intriguing field of study that could lead to a substantial increase in the lifespan of materials, improve the reliability of materials, increase product safety, and lower product replacement costs. Within the past few years, various autonomic and non-autonomic self-healing systems have been developed using various approaches for a variety of applications. The inclusion of appropriate functionalities into these materials by various chemistries has enhanced their repair mechanisms activated by crack formation. This review article summarizes various self-healing techniques that are currently being explored and the associated chemistries that are involved in the preparation of self-healing composite materials. This paper further surveys the electronic applications of self-healing materials in the fields of energy harvesting devices, energy storage devices, and sensors. We expect this article to provide the reader with a far deeper understanding of self-healing materials and their healing mechanisms in various electronics applications.

scholarly journals Cryostructuring of Polymeric Systems. 50.† Cryogels and Cryotropic Gel-Formation: Terms and Definitions

Gels ◽  
2018 ◽  
Vol 4 (3) ◽  
pp. 77 ◽  
Author(s):  
Vladimir Lozinsky
Keyword(s):  
Polymeric Materials ◽  
Gel Formation ◽  
Polymeric Systems ◽  
The Past ◽  
Marked Variability ◽  
Conference Presentations

A variety of cryogenically-structured polymeric materials are of significant scientific and applied interest in various areas. However, in spite of considerable attention to these materials and intensive elaboration of their new examples, as well as the impressive growth in the number of the publications and patents on this topic over the past two decades, a marked variability of the used terminology and definitions is frequently met with in the papers, reviews, theses, patents, conference presentations, advertising materials and so forth. Therefore, the aim of this brief communication is to specify the basic terms and definitions in the particular field of macromolecular science.

Practical Methods of GIS for Archaeologists: Viewshed Analysis – The Kingdom of Pylos example

2021 ◽  
Vol 8 (1) ◽  
pp. 1-22
Author(s):  
George D. Malaperdas
Keyword(s):  
Multidisciplinary Approach ◽  
New Technologies ◽  
Research Process ◽  
Residential Facilities ◽  
Large Area ◽  
Observation Station ◽  
Visibility Analysis ◽  
The Past ◽  
Viewshed Analysis ◽  
Area Of Study

Visibility (or Viewshed) Analysis in archeology is a function given through GIS, in purpose to contribute in the field of archaeology and especially in landscape archeology, by reconstituting the visual panorama of a study area of the past.  The concept of landscape archeology is a multidimensional research process that is not limited to archaeologists but places a special emphasis on a multidisciplinary approach. Mycenaean Messenia was the area of study and analysis of the visual panorama for two important reasons. First of all, it is a large area, which presents territories of varying heterogeneity in terms of morphology, while having a large sea front and an open observation horizon. Secondly, it is one of the continental regions of the Mycenaean period, which has evoked the largest number of residential facilities, structures and tombs, and also has been extensively studied by archaeologists since the 1920s. The main aim of this paper is to make an effort to identify archaeological information, through the bibliographic references of the archaeologists who studied the area, with the GIS visibility analysis. For that reason, the author tries for those residential locations that have been assigned a role or function of the site by archaeologists, such as an observation station, to be controlled in parallel and on the basis of new technologies (GIS and Viewshed Analysis) if this view is verified.

Why blackseed can be the cure for all illnesses except death

2021 ◽  
Vol 9 (4) ◽  
pp. 75-80
Author(s):  
Rashid Bhikha ◽  
Keyword(s):  
Pharmacological Action ◽  
The Body ◽  
Past Century ◽  
Self Healing ◽  
The Past ◽  
The Bible ◽  
The World ◽  
Prevention And Treatment ◽  
Vast Range ◽  
Regular Intake

The use of plants to prevent and treat illnesses has been known since time immemorial. Blackseed has been used in different civilizations around the world for centuries. The curative properties of blackseed were mentioned in the Bible and further elaborated on by Prophet Mohammed (PBUH) as “Hold on to the use of blackseed, as it has a remedy for every illness except death”. Extensive research conducted over the past century into the phytochemistry of blackseed has identified many active ingredients and confirmed its pharmacological action in the treatment of a vast range of illness conditions across the different systems of the body, including the prevention and treatment of cancer, and optimum functioning of the immune system. Furthermore, the Tibb philosophical principles highlight the ability of the body’s inherent self-healing capacity, known as Physis, and the intricate functioning of the human body, based on the temperamental and humoral theory. This paper emphasizes the importance of Physis, and its role in the maintenance and restoration of health with the regular intake of blackseed, highlighting why blackseed can be a cure for all illnesses except death. Keywords: Blackseed, phytochemistry, pharmacological action, Tibb philosophical principles.

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