scholarly journals Introduction to Plastics Engineering

2021 ◽  
pp. 1-6
Author(s):  
Hareesh Tippur
Keyword(s):  
Materials Science ◽  
Mechanical Design ◽  
Consumer Products ◽  
Daily Lives ◽  
The Past ◽  
Development Cycle ◽  
Cost Development ◽  
Engineering Mechanics ◽  
Technological Challenge ◽  
Plastics Industry

Abstract Industrial and consumer products made of plastics are ubiquitous in our daily lives. Converting raw plastics into useful parts is a scientific and technological challenge that has been progressively overcome in the past several decades. This expansive monograph authored by one of the leading experts with vast experience as an academic at IIT-Kanpur and a practitioner while at GE Corporate R&D tackles this huge subject by expounding aspects of transforming modern plastics into useful day-to-day items based on principles of mechanical engineering and engineering mechanics. It weaves together complex issues related to the mechanics, mechanical design, fabrication, and assembly of engineered plastics. In doing so, the book distinguishes itself from others by emphasizing not just the material science and ‘build-and-test’ approach embraced by the plastics industry, but by adopting approaches from engineering science and materials science synergistically to address practical issues of part design, size, cost, development cycle, and assembly, among others.

Materials Education—A Renewal

MRS Bulletin ◽  
1987 ◽  
Vol 12 (4) ◽  
pp. 20-23 ◽  
Author(s):  
G.L. Liedl
Keyword(s):  
Materials Science ◽  
Consumer Products ◽  
Dominant Factor ◽  
Central Position ◽  
National Academy Of Sciences ◽  
Science And Engineering ◽  
The Past ◽  
Materials Science And Engineering ◽  
National Economies ◽  
Academy Of Sciences

Materials have always been interwoven throughout the very fabric of man's history. The present reawakening to the value and importance of materials, however, has become a dominant factor in manufacturing, national security, international competition and trade, consumer products (quality and reliability), and even education. Other renewals of interest have occurred over the centuries, probably beginning with the formation of the first pot from clay. These renewals were associated with discoveries such as copper, iron, and the transistor. However, in the past 40 years the base for renewed interest has broadened.A true coupling of science and engineering into the field of materials was probably initiated in the 1940s and 1950s. Emphasis at that time was on metals and the “new” semiconductors, with an interest that incubated and grew to where their central position in national economies and man's daily life was recognized. In 1970 the National Academy of Sciences appointed a committee to conduct a comprehensive analysis and assessment of the field of “materials science and engineering.” The COSMAT report which resulted from that study had a dramatic impact on the field and has been a frame of reference for the past 17 years. These years have seen a virtual explosion of ideas, processes, and materials in the field.

The Contribution of Intermediate-Voltage, High-Resolution Electron Microscopy In Materials Science: An Appraisal

1990 ◽  
Vol 48 (1) ◽  
pp. 478-479
Author(s):  
John L. Hutchison
Keyword(s):  
High Resolution ◽  
Materials Science ◽  
High Resolution Electron Microscopy ◽  
Optical Diffraction ◽  
The Past ◽  
Resolution Electron ◽  
Extreme Sensitivity ◽  
Electron Microscopes ◽  
New Generation ◽  
Small Metal Particles

Over the past five years or so the development of a new generation of high resolution electron microscopes operating routinely in the 300-400 kilovolt range has produced a dramatic increase in resolution, to around 1.6 Å for “structure resolution” and approaching 1.2 Å for information limits. With a large number of such instruments now in operation it is timely to assess their impact in the various areas of materials science where they are now being used. Are they falling short of the early expectations? Generally, the manufacturers’ claims regarding resolution are being met, but one unexpected factor which has emerged is the extreme sensitivity of these instruments to both floor-borne and acoustic vibrations. Successful measures to counteract these disturbances may require the use of special anti-vibration blocks, or even simple oil-filled dampers together with springs, with heavy curtaining around the microscope room to reduce noise levels. In assessing performance levels, optical diffraction analysis is becoming the accepted method, with rotational averaging useful for obtaining a good measure of information limits. It is worth noting here that microscope alignment becomes very critical for the highest resolution.In attempting an appraisal of the contributions of intermediate voltage HREMs to materials science we will outline a few of the areas where they are most widely used. These include semiconductors, oxides, and small metal particles, in addition to metals and minerals.

SOMOphilic Alkynylation Using Acetylenic Sulfones as Functional Reagents

2021 ◽  
Author(s):  
Danhua Ge ◽  
Xin Wang ◽  
Xue-Qiang Chu
Keyword(s):  
Drug Discovery ◽  
Organic Synthesis ◽  
Materials Science ◽  
Polymer Chemistry ◽  
The Past ◽  
Acetylenic Sulfones

The past decades have witnessed a boom in alkynylation mainly owing to the importance of alkynyl-containing molecules in organic synthesis, drug discovery, polymer chemistry, and materials science. Besides conventional strategies,...

Transient Thermal Analysis for the Automotive Underhood and Underbody Components

2013 ◽  
Author(s):  
Yu Hsien Wu ◽  
Kumar Srinivasan ◽  
Steven Patterson ◽  
Emmanuel Bot
Keyword(s):  
Thermal Analysis ◽  
Thermal Management ◽  
Dissimilar Materials ◽  
Thermal Mass ◽  
New Approach ◽  
The Past ◽  
Full Vehicle ◽  
Development Cycle ◽  
Transient Thermal ◽  
Steady State Solutions

The transient thermal simulation is an important part of thermal management development for new vehicle architectures. Different techniques have been studied in the past to address this coupled conduction/convection/radiation problem. In order to fully capture the transient thermal behavior of various underhood and underbody components, it is also necessary to accurately model the thermal mass of each part and the thermal links between dissimilar materials. The paper will outline a new, efficient methodology for this type of thermal analysis that shows acceptable results for complex full vehicle thermal analysis without sacrificing accuracy. The methodology is based on approximating the transient convective field with intermittent steady state solutions. The paper will present results from this new approach and compare them with fully transient simulation results as well as experimental data. The new methodology can be optimized to significantly reduce simulation run times without sacrificing accuracy and to be more practical for application in the vehicle development cycle.

Marrying out: Exploring Dimensions of Cross-National Marriages among Qataris

2020 ◽  
Author(s):  
Sanaa Taha Alharahsheh ◽  
◽  
Feras Al Meer ◽  
Ahmed Aref ◽  
Gilla Camden
Keyword(s):  
Social Transformation ◽  
Social Changes ◽  
Daily Lives ◽  
Marriage Patterns ◽  
The Past ◽  
The World ◽  
Petroleum Resources ◽  
National Boundaries ◽  
And Migration ◽  
Cross National

In an age of social transformation characterized by globalization, wireless communication, and ease of travel and migration, more and more people around the world are marrying across national boundaries. This has occurred worldwide with the Gulf Cooperation Council (GCC) as no exception to this trend. As with the rest of the GCC, Qatar has witnessed remarkable social changes because of the discovery of petroleum resources that have affected the daily lives of people within Qatar in myriad ways. This includes marriage patterns, whereby cross-national marriages (marriages with non-Qataris) have shown a marked increase during the past few years, reaching 21% of total Qatari marriages in 2015 compared with only 16.5% in 1985.

scholarly journals Emerging Stem Cell Controls: Nanomaterials and Plasma Effects

2013 ◽  
Vol 2013 ◽  
pp. 1-15 ◽  
Author(s):  
F. F. Borghi ◽  
A. E. Rider ◽  
S. Kumar ◽  
Z. J. Han ◽  
D. Haylock ◽  
...  
Keyword(s):  
Stem Cell ◽  
Tissue Regeneration ◽  
Materials Science ◽  
Specific Interaction ◽  
Cell Control ◽  
Nanostructured Surfaces ◽  
Plasma Effects ◽  
Cell Sources ◽  
Technological Challenge

Stem cells (SC) are among the most promising cell sources for tissue engineering due to their ability to self-renew and differentiate, properties that underpin their clinical application in tissue regeneration. As such, control of SC fate is one of the most crucial issues that needs to be fully understood to realise their tremendous potential in regenerative biology. The use of functionalized nanostructured materials (NM) to control the microscale regulation of SC has offered a number of new features and opportunities for regulating SC. However, fabricating and modifying such NM to induce specific SC response still represent a significant scientific and technological challenge. Due to their versatility, plasmas are particularly attractive for the manufacturing and modification of tailored nanostructured surfaces for stem cell control. In this review, we briefly describe the biological role of SC and the mechanisms by which they are controlled and then highlight the benefits of using a range of nanomaterials to control the fate of SC. We then discuss how plasma nanoscience research can help produce/functionalise these NMs for more effective and specific interaction with SCs. The review concludes with a perspective on the advantages and challenges of research at the intersection between plasma physics, materials science, nanoscience, and SC biology.

scholarly journals Challenges South African youth face in education and their quest to eradicate issues of the past

2021 ◽  
Author(s):  
Lauren Kim Barnes
Keyword(s):  
South Africa ◽  
South African ◽  
Education System ◽  
Daily Lives ◽  
The Past ◽  
African Youth ◽  
Democratic Elections ◽  
Unequal Opportunities

The youth of South Africa today face many challenges in their daily lives. The majority of South Africa's population is made up of youth- people aged between 15 and 35 years old. The youth in South Africa face challenges such as crime, unemployment, poverty, and most importantly unequal opportunities in education. These challenges should not be present in the daily lives of South African youth, especially since it has been over two decades since South Africa’s first democratic elections. The challenges that are faced in the education system is explored and solutions are suggested to help end the chain of poverty.

scholarly journals A REVIEW ON THE CHARACTERISTICS OF A GOOD QUALITY LEADERSHIP STYLE

2019 ◽  
Vol 7 (5) ◽  
pp. 1152-1159
Author(s):  
Wael Ibrahim Alsarrani ◽  
Ahmad Jusoh
Keyword(s):  
Leadership Styles ◽  
Leadership Style ◽  
Theoretical Knowledge ◽  
Review Of The Literature ◽  
Daily Lives ◽  
Future Studies ◽  
The Past ◽  
Leadership Process ◽  
Definition Of

Purpose: Leadership is an interactive concept that influences our daily lives. A quality concept is an approach and philosophy that leaders use to incorporate the leadership process into the organization successfully. Both concepts have an incremental history, correlation, and discussion. However, the two concepts have not yet been theoretically and empirically integrated. This paper attempts to integrate and discuss leadership and quality to create a single quality leadership style based on the definition of quality gurus and the leadership styles which relate more towards the quality of leadership. Methodology: The study used a systematic literature review to review the past literature related to the field of leadership and quality management. This study provides the constructs from definitions proposed by experts in this field. Each leadership styles have many constructs that may or may not be related to quality. Results: The study proposed a conceptual framework which combined the definitions of quality gurus and the different leadership styles. The finding of this study has contributed to the expansion of theoretical knowledge in the field of quality leadership style. Implications: This paper indicated that the review of the literature regarding what quality gurus define as important relating to leadership. This paper provides the constructs from quality gurus definitions. Novelty: Each leadership styles have many constructs that may or may not be related to quality. Therefore, future studies need to consider what the constructs from those leadership styles are considered effective to quality.

scholarly journals Bioplastics – An Eco-friendly Alternative to Petrochemical Plastics

2019 ◽  
Vol 14 (1) ◽  
pp. 49-59 ◽  
Author(s):  
M. Selvamurugan Muthusamy ◽  
Sivakumar Pramasivam
Keyword(s):  
Public Awareness ◽  
Plastic Pollution ◽  
Daily Lives ◽  
Global Estimate ◽  
The Past ◽  
Past Half Century ◽  
Term Change ◽  
Past Half ◽  
Emission Of Greenhouse Gases

Plastics have varied application and have become an essential part of our daily lives. The use of the plastics has increased twenty-fold in the past half-century and is expected to double again in the next 20 years. As a global estimate, around 330 million tonnes of the plastics are produced per annum. The production, use and disposal of the plastics emerged as a persistent and potential environmental nuisance. The improper disposal of the plastics ends up in our environment, resulting in the deaths of millions of animals annually and also the reduction in fertility status of the soil. The bioplastics products are manufactured to be biodegradable with similar functionality to that of conventional plastics, which has the potential to reduce the dependence on petrochemicals based plastics and related environmental problems. The expansion and development of the bioplastics and their products would lead to the increase in the sustainability of environment and reduction in the emission of greenhouse gases. The bioplastics innovation would be a key to the long-term solution for the plastic pollution. However, a widespread public awareness is also essential in effecting longer-term change against plastic pollution.

scholarly journals LANDSCAPE AND ORIENTATION OF MEGALITHIC CHAMBERS IN MECKLENBURG-VORPOMMERN (NORTH GERMANY): PHENOMENOLOGY PERSPECTIVE (Bentang Alam dan Orientasi Megalitik di Mecklenburg-Vorpommern Jerman Utara: Perspektif Phenomenologi)

2017 ◽  
Vol 6 (2) ◽  
pp. 135-141
Author(s):  
Marlin Tolla
Keyword(s):  
Edmund Husserl ◽  
Phenomenological Approach ◽  
Archaeological Sites ◽  
Northern Germany ◽  
Daily Lives ◽  
The Past ◽  
Sensory Experiences ◽  
German Philosopher ◽  
Phenomenological Perspective ◽  
North Germany

Phenomenological perspective is one of the approaches in archaeology especially applies to the use of sensory experiences of the past peoples through material cultures. Phenomenological approaches is based of some German philosopher such as Edmund Husserl, MartinHeidegger which put their attention to perceptions and knowledge which are based on experience of daily lives. Phenomenological approach have been produces a great impact through some works of archaeologist especialy from the group of Post-Procesualist such as Christian Tilley and others in attempt to interpretated the landscape phenomenon in Britain archaeological sites. In relations with that, the phenomenology approaches will be used to analysed the groups of megaliths chambers in Mecklenburg-Vorpommern (northern Germany) according to the cosmological significance.ABSTRAKPenomenologi adalah salah satu pendekatan yang digunakan dalam arkeolologi terutama dalam menganalisa ‘experience’ atau pengalaman manusia pada masa lalu melalui budaya material yang ditinggalkan. Pendekatan ini diadopsi dari filosof Jerman seperti: Edmund Husserl dan Martin Heidegger yang menekankan bahwa esensi dari presepsi manusia adalah terletak pada ‘pengalaman’ yang ditemukan di setiap hari. Pendekatan ini kemudian diadopsi oleh arkeolog terutama yang berasal dari grup Post-prosesualis seperti Christian Tilley dan lainnya terutama dalam menginterpretasikan arkeologi landskap. Merujuk pada hal ini, megalitik di Mecklenburg-Vorpommern diindikasikan sebagai ‘buah’ dari pengalaman oleh manusia pada masa lalu dalam menginterpretasikan alam sekitar mereka terutama dalam hubungannya dengan kosmologi.

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