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Knowledge active forgetting: the forgotten side of knowledge management
, Article PICMET 2009 - 2009 Portland International Conference on Management of Engineering and Technology, Portland, OR, 2 August 2009 through 6 August ; 2009 , Pages 1007-1018 ; 1890843202 (ISBN); 9781890843205 (ISBN) ; Bagherzadeh Niri, M ; Rahimi, M ; Yarmand, H ; Sharif University of Technology
2009
Abstract
As Gregory Bateson, the British social scientists, once said "You can't live without an eraser", the process of learning is not a unidirectional way toward accumulation of knowledge, rather, organizations should critically evaluate the value of their knowledge and if necessary, actively forget no-longer-useful knowledge. A brief review of related literature shows that the concept of knowledge active forgetting (KAF) is a crucial aspect of organizational learning and knowledge management. However, many aspects of this topic deserve more attention by researchers. The main gap in the literature seems to be related to the linkage between peculiar aspects of knowledge (such as stickiness, context...
Quantum dots for photocatalysis: synthesis and environmental applications
, Article Green Chemistry ; Volume 23, Issue 14 , 2021 , Pages 4931-4954 ; 14639262 (ISSN) ; Mousavi Khadem, S ; Habibzadeh, S ; Esmaeili, A ; Abida, O ; Vatanpour, V ; Rabiee, N ; Bagherzadeh, M ; Iravani, S ; Saeb, M. R ; Varma, Rajender. S ; Sharif University of Technology
Royal Society of Chemistry
2021
Abstract
Quantum dots (QDs) with unique properties have been widely employed for energy, environmental, and health care applications. Green natural resources, because of their renewability, sustainability, abundance, low cost, and environmental-friendliness, can be utilized for the synthesis of diverse nanoarchitectures. This critical review highlights the recent advancements in the greener and sustainable synthesis of carbon, graphene and metal-based QDs, as well as their significant environmental applications such as photocatalytic hydrogen production, degradation of hazardous contaminants/pollutants and reduction of CO2, with emphasis on the important challenges and future perspectives. © The...
Antibacterial Ti–Cu implants: A critical review on mechanisms of action
, Article Materials Today Bio ; Volume 17 , 2022 ; 25900064 (ISSN) ; Akbarpour, M. R ; Lakeh, H. B ; Jing, F ; Hadidi, M. R ; Akhavan, B ; Sharif University of Technology
Elsevier B.V
2022
Abstract
Titanium (Ti) has been widely used for manufacturing of bone implants because of its mechanical properties, biological compatibility, and favorable corrosion resistance in biological environments. However, Ti implants are prone to infection (peri-implantitis) by bacteria which in extreme cases necessitate painful and costly revision surgeries. An emerging, viable solution for this problem is to use copper (Cu) as an antibacterial agent in the alloying system of Ti. The addition of copper provides excellent antibacterial activities, but the underpinning mechanisms are still obscure. This review sheds light on such mechanisms and reviews how incorporation of Cu can render Ti–Cu implants with...
Rubber-toughened epoxies: A critical review
, Article Polymer Reviews ; Volume 49, Issue 3 , 2009 , Pages 201-225 ; 15583724 (ISSN) ; Marouf, B. T ; Pearson, R. A
2009
Abstract
Epoxy resins have been used as structural materials since the late 1940s. Despite their desirable properties such as high strength, excellent creep resistance, and good adhesion, they suffer from low fracture energy. Rubber modification as a major toughening approach to overcome the inherent brittleness of epoxy polymers was introduced during the early 1970s. Since then, a large number of investigations have been conducted to elucidate different aspects of rubber-toughened epoxies. The present work is a critical review of the field focusing on the important parameters affecting rubber-toughening. The studies reviewed are classified in five categories including roles of matrix ductility,...
Critical review on fusion welding of magnesium alloys: metallurgical challenges and opportunities
, Article Science and Technology of Welding and Joining ; Volume 26, Issue 8 , 2021 , Pages 559-580 ; 13621718 (ISSN) ; Sharif University of Technology
Taylor and Francis Ltd
2021
Abstract
As the lightest structural alloys, magnesium alloys offer significant potential for improving the energy efficiency of various transportation systems. The lack of sufficient weldability of Mg alloys is a crucial barrier to their potential use in safety-critical applications. Porosity formation, grain structure engineering, solidification cracking, liquation, and liquation cracking are the key metallurgical challenges to obtain reliable and robust fusion welds in Mg alloys. This critical review highlights the current understating regarding controlling the metallurgical phenomena during fusion welding of Mg alloys and discusses the unresolved metallurgical challenges to shed light on the path...
Polyethylene glycol (PEG) as a green solvent for carbon-carbon bond formation reactions
, Article Journal of Molecular Liquids ; Volume 207 , 2015 , Pages 73-79 ; 01677322 (ISSN) ; Mahmoodi Hashemi, M ; Sharif University of Technology
Abstract
In recent years, polyethylene glycol (PEG) has attracted special attention as a green and inexpensive solvent in various chemical transformations. The current critical review deals with breakthrough achievements for the applications of PEG as an alternative reaction media well-known coupling reactions such as Suzuki, Heck, Stille, Sonogashira, Hiyama and some challenging organic reactions for carbon-carbon bond formation
UiO-66 metal–organic frameworks in water treatment: A critical review
, Article Progress in Materials Science ; Volume 125 , 2022 ; 00796425 (ISSN) ; Molavi, H ; Rezakazemi, M ; Tajahmadi, S ; Bahi, A ; Ko, F ; Aminabhavi, T. M ; Li, J. R ; Arjmand, M ; Sharif University of Technology
Elsevier Ltd
2022
Abstract
Metal-organic frameworks (MOFs) have recently achieved much attention to eliminating toxic pollutants because of their attractive attributes, including large specific surface area, ultra-high porosity, abundant active adsorption sites, tunable surface chemistry, well-controlled pore size distribution, and strong host–guest interactions. Among the many developed MOFs, the Zr-based MOFs, particularly the UiO-66 family, are considered extremely attractive for wastewater treatment applications. The fascinating properties of UiO-66 such as high thermal stability, superior chemical resistance towards several solvents, including benzene, acetone, different alcohols, dimethylformamide, acidic and...
Lightweight geopolymer concrete: A critical review on the feasibility, mixture design, durability properties, and microstructure
, Article Ceramics International ; Volume 48, Issue 8 , 2022 , Pages 10347-10371 ; 02728842 (ISSN) ; Bahrami, N ; Karimzadeh, M ; Mohasanati, B ; Shoaei, P ; Ameri, F ; Ozbakkaloglu, T ; Sharif University of Technology
Elsevier Ltd
2022
Abstract
Lightweight geopolymer concretes have gained attention because of their superior durability, lower environmental impact and sustainable characteristics. They are the product of natural or artificial aggregates with low specific gravities mixed with aluminosilicate binders, and an alkaline solution. In this study, different aspects of lightweight geopolymer concretes and mortars such as environmental and economic considerations, materials and mixture, durability-related properties like permeability, chloride attacks and performance at high temperatures, thermal conductivity, and the microstructure are reviewed. This study also discusses the effect of different geopolymer binders and various...
Polysaccharide-based nanocomposites for biomedical applications: a critical review
, Article Nanoscale Horizons ; Volume 7, Issue 10 , 2022 , Pages 1136-1160 ; 20556756 (ISSN) ; Shokrani, A ; Sajadi, S. M ; Khodadadi Yazdi, M ; Seidi, F ; Jouyandeh, M ; Zarrintaj, P ; Kar, S ; Kim, S. J ; Kuang, T ; Rabiee, N ; Hejna, A ; Saeb, M. R ; Ramakrishna, S ; Sharif University of Technology
Royal Society of Chemistry
2022
Abstract
Polysaccharides (PSA) have taken specific position among biomaterials for advanced applications in medicine. Nevertheless, poor mechanical properties are known as the main drawback of PSA, which highlights the need for PSA modification. Nanocomposites PSA (NPSA) are a class of biomaterials widely used as biomedical platforms, but despite their importance and worldwide use, they have not been reviewed. Herein, we critically reviewed the application of NPSA by categorizing them into generic and advanced application realms. First, the application of NPSA as drug and gene delivery systems, along with their role in the field as an antibacterial platform and hemostasis agent is discussed. Then,...