Wastewise Material Glossary
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Ask Me About Microscope & Magnification…
ASK ME ABOUT MICROSCOPE & MAGNIFICATION… Today, an instructor from The Discovery Museums in Acton visited my classroom and led a hands-on program about microscopes and magnification. Ask me to tell you what amazing things I observed looking through lenses! I can tell you how I used water as a magnifier and we can explore together by trying the water lens activity below. I also really enjoyed using the 30x handheld microscopes. Ask me to tell you about all of the objects we checked out in our classroom such as the carpet, my desk surface, my hair and my skin. The hand held microscopes are sold at The Museums’ gift shop, science stores and some electronic shops. WATER SCOPE The first magnifiers were made with water lenses. Try making you own water lens. You will need: Small or large plastic yogurt containers, plastic wrap, pair of scissors, water, large rubber bands What to do: 1.) Ask an adult to cut the bottom of the yogurt container off, leaving at least a 3 inch wide ring. 2.) Cut a piece of plastic wrap and stretch it over the mouth of the yogurt container. Secure it with a rubber band. 3.) Push down gently on the top of the plastic wrap to make a shallow well. 4.) Pour a little water into this well. 5.) Place objects under the container and look through the water at the object. What do you notice? 6.) What happens if you change the amount of water you are looking through? Take it to the next step: Experiment with making additional water scopes. -
Improving Plastics Management: Trends, Policy Responses, and the Role of International Co-Operation and Trade
Improving Plastics Management: Trends, policy responses, and the role of international co-operation and trade POLICY PERSPECTIVES OECD ENVIRONMENT POLICY PAPER NO. 12 OECD . 3 This Policy Paper comprises the Background Report prepared by the OECD for the G7 Environment, Energy and Oceans Ministers. It provides an overview of current plastics production and use, the environmental impacts that this is generating and identifies the reasons for currently low plastics recycling rates, as well as what can be done about it. Disclaimers This paper is published under the responsibility of the Secretary-General of the OECD. The opinions expressed and the arguments employed herein do not necessarily reflect the official views of OECD member countries. This document and any map included herein are without prejudice to the status of or sovereignty over any territory, to the delimitation of international frontiers and boundaries and to the name of any territory, city or area. For Israel, change is measured between 1997-99 and 2009-11. The statistical data for Israel are supplied by and under the responsibility of the relevant Israeli authorities. The use of such data by the OECD is without prejudice to the status of the Golan Heights, East Jerusalem and Israeli settlements in the West Bank under the terms of international law. Copyright You can copy, download or print OECD content for your own use, and you can include excerpts from OECD publications, databases and multimedia products in your own documents, presentations, blogs, websites and teaching materials, provided that suitable acknowledgment of OECD as source and copyright owner is given. -
Plastic Industry Awareness of the Ocean Plastics Problem
Fueling Plastics Plastic Industry Awareness of the Ocean Plastics Problem • Scientists became aware of the ocean plastics problem in the 1950s, and understanding of the nature and severity of the problem grew over the next decades. • The major chemical and petroleum companies and industry groups were aware of the ocean plastics problem no later than the 1970s. • Plastics producers have often taken the position that they are only responsible for plastic waste in the form of resin pellets, and that other forms of plastic waste are out of their control. The use of plastics in consumer resins and the fossil fuel companies the twentieth century. Early observ- goods has been expanding exponen- supplying them with chemical feed- ers concerned about marine plas- tially since the late 1940s. Within stocks — have known about this tics were specifically worried about years of that expansion beginning, problem and for how long. The re- marine animals becoming entan- observers began to document plas- mainder of this document presents a gled in discarded fishing gear and tic pollution in the environment, brief overview of the history of pub- other plastic wastes. As noted by including in the world’s oceans. lic and industry awareness of marine the United States’ National Oce- Plastic is a pollutant of unique con- plastic pollution. Although this his- anic and Atmospheric Administra- cern because it is durable over long torical account is detailed, it is far tion (NOAA), “[p]rior to the 1950s periods of time and its effects accu- from comprehensive, and additional much of the fishing gear and land- mulate as more of it is produced and research is forthcoming. -
Multidisciplinary Design Project Engineering Dictionary Version 0.0.2
Multidisciplinary Design Project Engineering Dictionary Version 0.0.2 February 15, 2006 . DRAFT Cambridge-MIT Institute Multidisciplinary Design Project This Dictionary/Glossary of Engineering terms has been compiled to compliment the work developed as part of the Multi-disciplinary Design Project (MDP), which is a programme to develop teaching material and kits to aid the running of mechtronics projects in Universities and Schools. The project is being carried out with support from the Cambridge-MIT Institute undergraduate teaching programe. For more information about the project please visit the MDP website at http://www-mdp.eng.cam.ac.uk or contact Dr. Peter Long Prof. Alex Slocum Cambridge University Engineering Department Massachusetts Institute of Technology Trumpington Street, 77 Massachusetts Ave. Cambridge. Cambridge MA 02139-4307 CB2 1PZ. USA e-mail: [email protected] e-mail: [email protected] tel: +44 (0) 1223 332779 tel: +1 617 253 0012 For information about the CMI initiative please see Cambridge-MIT Institute website :- http://www.cambridge-mit.org CMI CMI, University of Cambridge Massachusetts Institute of Technology 10 Miller’s Yard, 77 Massachusetts Ave. Mill Lane, Cambridge MA 02139-4307 Cambridge. CB2 1RQ. USA tel: +44 (0) 1223 327207 tel. +1 617 253 7732 fax: +44 (0) 1223 765891 fax. +1 617 258 8539 . DRAFT 2 CMI-MDP Programme 1 Introduction This dictionary/glossary has not been developed as a definative work but as a useful reference book for engi- neering students to search when looking for the meaning of a word/phrase. It has been compiled from a number of existing glossaries together with a number of local additions. -
TSCA Inventory Representation for Products Containing Two Or More
mixtures.txt TOXIC SUBSTANCES CONTROL ACT INVENTORY REPRESENTATION FOR PRODUCTS CONTAINING TWO OR MORE SUBSTANCES: FORMULATED AND STATUTORY MIXTURES I. Introduction This paper explains the conventions that are applied to listings of certain mixtures for the Chemical Substance Inventory that is maintained by the U.S. Environmental Protection Agency (EPA) under the Toxic Substances Control Act (TSCA). This paper discusses the Inventory representation of mixtures of substances that do not react together (i.e., formulated mixtures) as well as those combinations that are formed during certain manufacturing activities and are designated as mixtures by the Agency (i.e., statutory mixtures). Complex reaction products are covered in a separate paper. The Agency's goal in developing this paper is to make it easier for the users of the Inventory to interpret Inventory listings and to understand how new mixtures would be identified for Inventory inclusion. Fundamental to the Inventory as a whole is the principle that entries on the Inventory are identified as precisely as possible for the commercial chemical substance, as reported by the submitter. Substances that are chemically indistinguishable, or even identical, may be listed differently on the Inventory, depending on the degree of knowledge that the submitters possess and report about such substances, as well as how submitters intend to represent the chemical identities to the Agency and to customers. Although these chemically indistinguishable substances are named differently on the Inventory, this is not a "nomenclature" issue, but an issue of substance representation. Submitters should be aware that their choice for substance representation plays an important role in the Agency's determination of how the substance will be listed on the Inventory. -
Chapter 2 the Solid Materials of the Earth's Surface
CHAPTER 2 THE SOLID MATERIALS OF THE EARTH’S SURFACE 1. INTRODUCTION 1.1 To a great extent in this course, we will be dealing with processes that act on the solid materials at and near the Earth’s surface. This chapter might better be called “the ground beneath your feet”. This is the place to deal with the nature of the Earth’s surface materials, which in later sections of the chapter I will be calling regolith, sediment, and soil. 1.2 I purposely did not specify any previous knowledge of geology as a prerequisite for this course, so it is important, here in the first part of this chapter, for me to provide you with some background on Earth materials. 1.3 We will be dealing almost exclusively with the Earth’s continental surfaces. There are profound geological differences between the continents and the ocean basins, in terms of origin, age, history, and composition. Here I’ll present, very briefly, some basic things about geology. (For more depth on such matters you would need to take a course like “The Earth: What It Is, How It Works”, given in the Harvard Extension program in the fall semester of 2005– 2006 and likely to be offered again in the not-too-distant future.) 1.4 In a gross sense, the Earth is a layered body (Figure 2-1). To a first approximation, it consists of concentric shells: the core, the mantle, and the crust. Figure 2-1: Schematic cross section through the Earth. 73 The core: The core consists mostly of iron, alloyed with a small percentage of certain other chemical elements. -
Electronic Communication in Plastic Surgery: Surgery: in Plastic Communication Electronic Copyright © 2017 American Society of Plastic Surgeons
SPECIAL TOPIC Downloaded Electronic Communication in Plastic Surgery: from Guiding Principles from the American Society https://journals.lww.com/plasreconsurg of Plastic Surgeons Health Policy Committee Kyle R. Eberlin, M.D. Background: With the advancement of technology, electronic communication Galen Perdikis, M.D. has become an important mode of communication within plastic and recon- Downloaded Lynn Damitz, M.D. by from structive surgery. This can take the form of e-mail, text messaging, video con- BhDMf5ePHKav1zEoum1tQfN4a+kJLhEZgbsIHo4XMi0hCywCX1AWnYQp/IlQrHD3wxNooCNzZvhCPLdW9NJ2mv6dqe+oOWSEH0yQQpVcu8c= https://journals.lww.com/plasreconsurg Dan J. Krochmal, M.D. ferencing, and social media, among others. There are currently no defined Loree K. Kalliainen, M.D. by BhDMf5ePHKav1zEoum1tQfN4a+kJLhEZgbsIHo4XMi0hCywCX1AWnYQp/IlQrHD3wxNooCNzZvhCPLdW9NJ2mv6dqe+oOWSEH0yQQpVcu8c= American Society of Plastic Surgeons guidelines for appropriate professional Steven C. Bonawitz, M.D. use of these technologies. ASPS Health Policy Methods: A search was performed on PubMed and the Cochrane database; Committee terms included “telemedicine,” “text messaging,” “HIPAA,” “metadata,” “video Boston, Mass. conferencing,” “photo sharing,” “social media,” “Facebook,” “Twitter,” and “In- stagram.” Initial screening of all identified articles was performed; the level of on 03/26/2018 evidence, limitations, and recommendations were evaluated and articles were reviewed. Results: A total of 654 articles were identified in the level I screening process; after -
Review of Thermal Properties of Graphene and Few-Layer
Zhong Yan, Denis L. Nika and Alexander A. Balandin (invited review, submitted in 2014) INVITED REVIEW PAPER Review of Thermal Properties of Graphene and Few-Layer Graphene: Applications in Electronics Zhong Yan1, Denis L. Nika1,2 and Alexander A. Balandin1,3 1Nano-Device Laboratory, Department of Electrical Engineering and Materials Science and Engineering Program, Bourns College of Engineering, University of California – Riverside, Riverside, California, 92521 USA 2E. Pokatilov Laboratory of Physics and Engineering of Nanomaterials, Department of Physics and Engineering, Moldova State University, Chisinau, MD-2009, Republic of Moldova 3Quantum Seed LLC, 1190 Columbia Avenue, Riverside, California 92507 USA Abstract We review thermal properties of graphene and few-layer graphene, and discuss applications of these materials in thermal management of advanced electronics. The intrinsic thermal conductivity of graphene – among the highest of known materials – is dominated by phonons near the room temperature. The examples of thermal management applications include the few-layer graphene heat spreaders integrated near the heat generating areas of the high-power density transistors. It has been demonstrated that few-layer graphene heat spreaders can lower the hot-spot temperature during device operation resulting in improved performance and reliability of the devices. Keywords: graphene, thermal conductivity, heat spreaders, thermal management 1 Zhong Yan, Denis L. Nika and Alexander A. Balandin (invited review, submitted in 2014) I. Introduction Thermal management represents a major challenge in the state-of-the-art electronics due to rapid increase of power densities [1, 2]. Efficient heat removal has become a critical issue for the performance and reliability of modern electronic, optoelectronic, photonic devices and systems. -
Introduction to Material Science and Engineering Presentation.(Pdf)
Introduction to Material Science and Engineering Introduction What is material science? Definition 1: A branch of science that focuses on materials; interdisciplinary field composed of physics and chemistry. Definition 2: Relationship of material properties to its composition and structure. What is a material scientist? A person who uses his/her combined knowledge of physics, chemistry and metallurgy to exploit property-structure combinations for practical use. What are materials? What do we mean when we say “materials”? 1. Metals 2. Ceramics 3. Polymers 4. Composites - aluminum - clay - polyvinyl chloride (PVC) - wood - copper - silica glass - Teflon - carbon fiber resins - steel (iron alloy) - alumina - various plastics - concrete - nickel - quartz - glue (adhesives) - titanium - Kevlar semiconductors (computer chips, etc.) = ceramics, composites nanomaterials = ceramics, metals, polymers, composites Length Scales of Material Science • Atomic – < 10-10 m • Nano – 10-9 m • Micro – 10-6 m • Macro – > 10-3 m Atomic Structure – 10-10 m • Pertains to atom electron structure and atomic arrangement • Atom length scale – Includes electron structure – atomic bonding • ionic • covalent • metallic • London dispersion forces (Van der Waals) – Atomic ordering – long range (metals), short range (glass) • 7 lattices – cubic, hexagonal among most prevalent for engineering metals and ceramics • Different packed structures include: Gives total of 14 different crystalline arrangements (Bravais Lattices). – Primitive, body-centered, face-centered Nano Structure – 10-9 m • Length scale that pertains to clusters of atoms that make up small particles or material features • Show interesting properties because increase surface area to volume ratio – More atoms on surface compared to bulk atoms – Optical, magnetic, mechanical and electrical properties change Microstructure – 10-6 • Larger features composed of either nanostructured materials or periodic arrangements of atoms known as crystals • Features are visible with high magnification in light microscope. -
Plastic Manufacturing Questionnaire
PLASTIC MANUFACTURING QUESTIONNAIRE Name of Agent: Applicant: Processing methods used: Blow Molding Extrusion Injection Molding Compression Molding Thermoforming Lay up Molding Calendering Other: Detailed description of manufacturing process: Type of plastics: Type 1 (PVC, teflon, metamine, fomica & phonetics, other: ) Type 2 (polyurethane, cellulose acetate & polypropylene, rubber, other: ) Type 3 (cellulose nitrate, pryroxylin & nitrocellulose, other: ) Is process automated, computer-operated or manual? Plastic resins used: Pellets Flakes Granules Powders Liquid Paste Other: Are electrical equipment and wiring explosion proof? ...................................................................................... Yes No Are all process equipment grounded and bonded? .......................................................................................... Yes No Does the equipment have automatic shut off? .................................................................................................. Yes No What is the age of the processing equipment? Describe any obsolete, imported or custom-made equipment: What is the inspection and servicing schedule for equipment (including conveyors, hydraulic lines, etc.)? How often is the electrical equipment and wiring inspected and serviced by a licensed professional? Are you in compliance with NFPA 70 on electrical codes? ............................................................................... Yes No Are you in compliance with NFPA 77 on static electricity? .............................................................................. -
Phonons in Graphene and Van Der Waals Materials
Phonons in Graphene and van der Waals Materials Alexander A. Balandin Department of Electrical Engineering and Materials Science and Engineering Program University of California – Riverside MRS Medal Talk Fall 2013 Nano-Device Laboratory (NDL) Department of Electrical Engineering University of California – Riverside Profile: experimental and theoretical research in advanced materials and nano-devices Nanoscale Characterization PI: Alexander A. Balandin Phononics Research Thermal and Electrical & Applications Characterization Electronic Devices and Circuits Theory and Modeling Direct Energy Conversion Device Design and Raman, Fluorescence Characterization and PL Spectroscopy Optoelectronics Bio- Nanotech Alexander A. Balandin, University of California - Riverside Outline Introduction and Basic Definitions Phonons Thermal conductivity Thermal Conductivity of Graphene Raman spectroscopy Optothermal technique Theoretical interpretation Graphene Thermal Applications TIMs and PCMs Heat spreaders Phonons in van der Waals Materials Raman metrology Charge-density waves Outlook: Phononics and Phonon Engineering 3 Alexander A. Balandin, University of California - Riverside Practical Motivations: Why Material Scientists Should Study Thermal Properties? Data is after R. Mahajan et al., Proceed. IEEE (2006) No BIG fan solutions! The switch to multi-core designs alleviates the growth in the thermal design power (TDP) IEEE Spectrum illustration of the increase but does not solve the thermal issues in the feature hot-spot problem article Chill Out: New Materials and Designs Can Keep Chips Non-uniform power densities Cool by A.A. Balandin. leading to hot-spots (>500 W/cm2) Alexander A. Balandin, University of California - Riverside Basics of Phonons The quantum of the energy of a lattice vibration is called a phonon in analogy with the photon of the electromagnetic wave. -
Glossary of Materials Engineering Terminology
Glossary of Materials Engineering Terminology Adapted from: Callister, W. D.; Rethwisch, D. G. Materials Science and Engineering: An Introduction, 8th ed.; John Wiley & Sons, Inc.: Hoboken, NJ, 2010. McCrum, N. G.; Buckley, C. P.; Bucknall, C. B. Principles of Polymer Engineering, 2nd ed.; Oxford University Press: New York, NY, 1997. Brittle fracture: fracture that occurs by rapid crack formation and propagation through the material, without any appreciable deformation prior to failure. Crazing: a common response of plastics to an applied load, typically involving the formation of an opaque banded region within transparent plastic; at the microscale, the craze region is a collection of nanoscale, stress-induced voids and load-bearing fibrils within the material’s structure; craze regions commonly occur at or near a propagating crack in the material. Ductile fracture: a mode of material failure that is accompanied by extensive permanent deformation of the material. Ductility: a measure of a material’s ability to undergo appreciable permanent deformation before fracture; ductile materials (including many metals and plastics) typically display a greater amount of strain or total elongation before fracture compared to non-ductile materials (such as most ceramics). Elastic modulus: a measure of a material’s stiffness; quantified as a ratio of stress to strain prior to the yield point and reported in units of Pascals (Pa); for a material deformed in tension, this is referred to as a Young’s modulus. Engineering strain: the change in gauge length of a specimen in the direction of the applied load divided by its original gauge length; strain is typically unit-less and frequently reported as a percentage.