UNSW Australia
The University of New South Wales is an Australian public research university located in the Sydney suburb of Kensington. Established in 1949, it is ranked 4th in Australia, 45th in the world, and 2nd in New South Wales according to the 2018 QS World University Rankings. Address: Sydney NSW 2052, Australia Undergraduate tuition and fees: 16,016 AUD (2013) Total enrollment: 53,481 (2015) Products and Services: unsw.edu.auWebsite: : : : : Category: : Place name: : Website: https://www.unsw.edu.au/ Category: University Suggest an editUnable to add this file. Please check that it is a valid photo. Unable to add this file. Please check that it is a valid photo.
UNSW Australia List of Employees There's an exhaustive list of past and present employees! Get comprehensive information on the number of employees at UNSW Australia. You can filter them based on skills, years of employment, job, education, department, and prior employment.
UNSW Australia Salaries. You can even request information on how much does UNSW Australia pay if you want to. Learn about salaries, pros and cons of working for UNSW Australia directly from the past employees.
Find People by Employers You can rekindle an old relationship, reconnect with a long-lost friend, former boss, business acquaintance who might be useful in your new line of work. With our employee database, the possibilities are endless. All you have to do is type in a couple of keywords and we'll bring you the exact information you wanted!
37 UNSW Australia employees in database. Find out everything there's to know about UNSW Australia employees. We offer you a great deal of unbiased information from the internal database, personal records, and many other details that might be of interest to you.
UNSW Australia Employees
Procter & Gamble June 2015 - Present
University of Florida September 2011 - May 2015
Procter & Gamble June 2014 - August 2014
University of Florida August 2013 - December 2013
Procter & Gamble May 2013 - August 2013
UNSW Australia May 2012 - July 2012
Education
University of Florida 2011 — 2015
Bachelor of Science (B.S.), Materials Science and Engineering, 3.85/4.00
Universidad Autónoma de Yucatán 2011 — 2011
Spanish and Anthropology
University of Illinois at Urbana-Champaign July 2014 - Present
Orchard Downs Preschool September 2013 - December 2013
Shenzhen Energy Group Company Limited May 2013 - June 2013
UNSW Australia March 2012 - June 2012
Nanshan Municipal Environmental Protection Bureau January 2012 - January 2012
University of New South Wales August 2011 - November 2011
Skills
AutoCAD, Matlab, Groundwater Modeling, VBA, Visual C++, Microsoft Excel, Microsoft Word, Microsoft Office, 40 HOUR HAZWOPER, Databases, MODFLOW, Environmental..., Water, HAZWOPER, Environmental Impact..., Water Quality, Environmental Awareness, ArcGIS
Education
University of Illinois at Urbana-Champaign 2012 — 2014
Bachelor's degree, Civil and Environmental Engineering, 3.80
University of New South Wales 2009 — 2012
Bachelor of Science, Civil and Environmental Engineering, 3.3
Universität Innsbruck June 1987 - Present
UNSW Australia 2000 - 2014
Universität Innsbruck 1987 - 2013
EAIE 1989 - 2011
SPACE 2005 - 2010
TES 2001 - 2010
Skills
International Education, Intercultural..., Higher Education Expert, Interkulturelle..., Internationale Bildung, Marketingstrategie, Projektmanagement, Qualitative Forschung, Unternehmensführung, Unternehmensstrategie, Vorlesungen, Deutsch, Unterrichten, Englisch, English, Hochschulwesen, Strategisches Management
Education
LFU Innsbruck /Volkswirtschaft
Diplom, Mag.rer.soc.oec.
Leopold-Franzens Universität Innsbruck
Mag.rer.soc.oec, Volkswirtschaft
Propex Derivatives April 2015 - May 2015
Shoplink November 2014 - April 2015
UNSW Australia July 2013 - October 2013
IRANSA @ Arc April 2013 - October 2013
University of New South Wales July 2012 - October 2013
UTS November 2011 - January 2012
KSP June 2011 - August 2011
Education
Harvard University 2013 — 2014
PhD Research Fellow, Engineering & Applied Sciences
University of New South Wales
Doctor of Philosophy (Ph.D.), Mechanical Engineering - Microbubbles in haemodialysis and biomedical applications
California Polytechnic State University LecturerUNSW AustraliaAugust 2011 - August 2014
United States Naval Academy May 2012 - July 2014
UNSW Australia August 2010 - February 2011
AECOM August 2009 - February 2011
UNSW Solar Racing Team Sunswift August 2008 - October 2009
Aircraft Research Association Ltd. January 2004 - July 2004
Education
UNSW Australia 2012 — 2014
Graduate Certificate, University Learning and Teaching
UNSW Australia 2005 — 2009
Doctor of Philosophy (PhD), Aerodynamics
The University of Glasgow 1999 — 2004
Master of Engineering (M.Eng.), Aeronautical Engineering
Louisiana State University August 2014 - Present
UNSW Australia January 2014 - June 2014
Shengli Oilfield July 2013 - August 2013
Skills
Hydraulic Fracturing, Drilling, Poroelasticity, Matlab, Geomechanics, SPSS, Wellbore Stability, Modeling, Petroleum Engineering, Reservoir Engineering, Petroleum, Research, Energy, Geology
Education
Louisiana State University 2014 — 2017
Master of Science, Petroleum Engineering (M.S.P.E.)
UNSW Australia 2014 — 2014
University of Petroleum (East China) 2010 — 2014
Bachelor of Engineering, Petroleum Engineering (B.S.P.E.)
University of Delaware September 2015 - Present
University of Delaware June 2012 - Present
University of Delaware January 2012 - Present
University of Delaware August 2011 - May 2012
Suntech May 2011 - July 2011
EnergyAustralia October 2010 - March 2011
University of New South Wales October 2008 - June 2010
UNSW Australia November 2009 - February 2010
Skills
Design of Experiments, Nanomaterials, Nanofabrication, Semiconductor Process, Photovoltaics, Optoelectronics, Device Modeling, Device Characterization, PECVD, Matlab, Java, Sentaurus TCAD, Python, C/C++ STL, Photolithography, SEM/TEM, CV, FIB, ATR-FTIR, Raman Spectroscopy, Ellipsometry, UV-Vis-NIR, LabVIEW, Silvaco, PC1D, COMSOL, AutoCAD, Photoshop, XPS/XRD, AFM, OES, LBIC/PL/EL
Education
University of Delaware 2011 — 2016
Doctor of Philosophy (PhD), Electrical and Computer Engineering, 3.7
UNSW Australia
First-class Honor Bachelor of Engineering, Class of 2010, Photovoltaics and Renewable Energy Engineering, 3.8
UNSW Australia June 2012 - July 2012
Skills
Microsoft Office, Microsoft Excel, Tourism Management, Microsoft Word, Customer Service, PowerPoint, Time Management, Event Planning, Leadership, Teamwork, Public Speaking, Social Networking, Social Media
Education
Georgia College and State University 2009 — 2013
Bachelor of Business Administration (BBA), Business Administration and Management, General Economics
University of New South Wales 2012 — 2012
Hospitality Administration/Management
10EQS July 2015 - Present
UNSW Australia June 2014 - June 2015
Deloitte Australia January 2015 - February 2015
UNSW Australia 2014 - 2014
Deloitte July 2013 - December 2013
Origin Energy January 2013 - July 2013
BT Financial Group January 2012 - July 2012
Skills
Teamwork, Risk Management, Microsoft Excel, Microsoft Office, Research, English, PowerPoint, Business Process..., Social Media, Microsoft Word, Business Analysis, Crowdfunding, Qualitative Data, E-Recruitment, Crowdsourcing
Education
University of New South Wales 2011 — 2014
Bachelor Business Information Systems Co-op (Hons), Information Systems
University College Dublin 2012 — 2012
Academic Exchange
University of Rhode Island August 2013 - Present
www.oceanbites.org September 2013 - May 2015
UNSW Australia July 2012 - December 2012
Skills
Environmental Awareness, Environmental..., Environmental Monitoring, Mass Spectrometry, Gas Chromatography, HPLC, Bayesian statistics, R
Education
University of Rhode Island 2013 — 2015
Master's degree, Oceanography, Chemical and Physical
Nanjing University 2009 — 2013
Bachelor of Science (BS), Environmental Science
University of New South Wales 2012 — 2012
Chemistry
Extensis Group June 2015 - Present
Evernight Publishing April 2015 - Present
Extasy books March 2015 - Present
Self Employed November 2011 - Present
Birthday Curl L.L.C. July 2012 - Present
UNSW Australia June 2014 - December 2014
Ellora's Cave March 2014 - September 2014
SNP Security March 2014 - June 2014
AppleOne March 2013 - December 2013
Kingston University September 2010 - March 2012
Skills
Creative Writing, Blogging, Editorial, Editing, Social Networking, Proofreading, Adobe Creative Suite, Publications, Publishing, Final Cut Pro, Desktop Publishing, Advertising, Copywriting, Fashion, Publicity, Microsoft Office, OS X, Email Marketing, Writing, SEO copywriting, Creative Direction, Photography, QuarkXPress, iOS, Windows, Marketing, Mac OS X, Social Media Marketing, Content Management, Event Planning, Event Management, Marketing Communications, Leadership, Social Media, Online Marketing, Freelance Writing, Copy Editing, Photoshop, Online Publishing, Digital Media, Marketing Research, Due Diligence
Education
Kingston University 2010 — 2012
Master of Art, Creative Writing and Publishing
Berkeley College 2004 — 2006
Bachelor of Science (BSc), Fashion Marketing & Management, 3.7
Berkeley College-Woodland Park 2005 — 2005
Bachelor of Science (BSc), Study Abroad, 3.7
NCS Madison September 2015 - Present
Training and Development November 2014 - Present
Alphabet Media June 2011 - June 2014
UNSW Australia July 2011 - November 2012
RH Production Consultancy May 2003 - January 2010
marcus evans Group 1998 - 2003
marcus evans Group 1998 - 2003
Skills
Government, Business Development, Event Management, Training, Marketing, Program Development, B2B, Strategic Communications, Program Management, Publishing, Coaching, Policy, Strategic Planning, Change Management, Market Research, Instructional Design, Conference Production, E-government, Governance, Strategy, Management, Certified Trainer, GROW and I-GROW Models..., Peak Performance..., Cognitive Coaching, Classroom Management..., ADDIE Model of..., Understanding By Design, Business Strategy, Leadership
Education
Sydney University 2012 — 2014
Post Graduate Certificate in Coaching, Coaching Pyschology
Workplace Australia 2010 — 2010
Certified Trainer, Training and Assesment Certificate IV
University of NSW 1995 — 1997
Master of Commernce, Marketing and Organisational Development
Macquarie University 1986 — 1990
Master of Arts, Immigration Studies
University of New England (AU)
Bacholar of Arts, Sociology
Frontier / Society for Environmental Exploration May 2015 - May 2015
University of Maryland July 2014 - August 2014
Shiwiar Community July 2014 - July 2014
UNSW Australia June 2013 - July 2013
The GREEN Program March 2013 - March 2013
Delphinus Medical Technologies, Inc. June 2012 - August 2012
Karmanos Cancer Institute June 2011 - August 2011
Skills
Microsoft Office, Microsoft Excel, Microsoft Word, Leadership, Mechanical Engineering, Sustainability, Renewable Energy
Education
University of Michigan - Stephen M. Ross School of Business 2015 — 2016
Master of Management
University of Michigan 2011 — 2015
Engineer’s Degree, Mechanical Engineering, 3.57, Magna Cum Laude
Andover High School 2007 — 2011
University of Minnesota September 2014 - Present
UNSW Australia August 2010 - February 2014
UNSW Australia June 2012 - November 2013
ANU College of Business and Economics December 2005 - July 2010
Skills
Communication, Biology, Team Leadership, Teamwork, Problem Solving, High level of initiative, Organization, Self Management, Learning Quickly, Technology, Writing, Chef, Multilingual, Critical Thinking, Statistics, Immunocytochemistry, Laboratory, ELISA, Western Blotting, Cell Culture, Research, Matlab, Science, Microsoft Office, Data Analysis
Education
UNSW 2010 — 2014
Doctor of Philosophy (PhD), Biomedical/Medical Engineering
University of Sydney 2009 — 2010
Master's degree, Biomedical Engineering
The Australian National University 2006 — 2009
Bachelor's degree, Medical Science
UNSW Australia February 2015 - July 2015
Gigaom August 2014 - March 2015
Gigaom May 2014 - August 2014
Skills
Microsoft Office, Salesforce.com, Communication, Teamwork
Education
Texas Christian University 2012 — 2016
Bachelor of Business Administration (BBA), Entrepreneurship/Entrepreneurial Studies, Anthropology Minor, Senior
Texas Christian University - M.J. Neeley School of Business
University of New South Wales July 2010 - September 2014
UNSW Australia March 2013 - November 2013
UNSW Australia March 2011 - November 2012
UNSW Australia March 2011 - June 2012
UNSW Australia March 2011 - June 2011
Sylvan Learning Centers February 2010 - July 2010
Florida Institute of Technology August 2005 - December 2009
Arkansas Center for Space and Planetary Sciences May 2009 - August 2009
Florida Institute of Technology February 2008 - May 2009
Florida Institute of Technology August 2007 - February 2008
Education
UNSW Australia 2010 — 2015
Doctor of Philosophy (Ph.D.), Astronomy and Astrophysics
Florida Institute of Technology 2005 — 2009
Bachelor’s Degree, Astronomy and Astrophysics, 3.74
Florida Institute of Technology 2005 — 2009
Bachelor’s Degree, Mathematics, 3.74
Deloitte September 2014 - Present
UNSW Australia March 2014 - May 2014
Deloitte June 2013 - August 2013
Texas Instruments May 2012 - August 2012
Skills
Matlab, Chemical Engineering, Minitab, Design of Experiments, Mathematica
Education
Cornell University 2012 — 2013
Master's of Engineering, Chemical Engineering, Energy Economics and Engineering
Cornell University 2009 — 2013
Bachelor's of Science, Chemical Engineering
Texas Christian University September 2014 - Present
UNSW Australia February 2014 - June 2014
Meritage Homes May 2013 - May 2013
Omena Traverse Yacht Club June 2011 - August 2011
Omena Traverse Yacht Club June 2010 - August 2010
Omena Traverse Yacht Club June 2009 - August 2009
Omena Traverse Yacht Club June 2008 - August 2008
Omena Traverse Yacht Club June 2007 - August 2007
Skills
Sailing, Leadership, Teamwork, Social Media
Education
Texas Christian University 2011 — 2015
Bachelor of Arts (BA), History and Communication Studies
University of New South Wales 2014 — 2014
Semester Abroad
The University of Chicago - Booth School of Business 2013 — 2013
Pre-MBA, Summer Business Scholars Program
Brophy College Preparatory 2007 — 2011
Jesuit High School
ConeTec Investigations July 2015 - Present
Gentle Giant Moving Co. June 2009 - July 2015
Queen's University September 2014 - April 2015
UNSW Australia February 2014 - June 2014
Total Sports Management, LLC April 2006 - July 2009
Skills
Transportation, AutoCAD, Construction Management, Construction, Civil Engineering, Engineering, Customer Service, PowerPoint, Teamwork, Project Management, Microsoft Word, Team Leadership, Microsoft Excel, Microsoft Office, Leadership, Public Speaking, Time Management, Computer Proficiency, Research, Social Media, Party Favors
Education
Queen's University 2011 — 2015
Bachelor of Applied Science (B.A.Sc.), Civil Engineering
UNSW Australia 2014 — 2014
Phillips Exeter Academy 2010 — 2011
High School
Pinkerton Academy 2006 — 2010
High School
PSAV September 2015 - Present
Queensland University of Technology June 2013 - July 2015
TUFF Cabling May 2009 - July 2013
UNSW Australia May 2011 - June 2013
ELECTROBOARD Solutions February 2011 - May 2011
Sydney Convention and Exhibition Centre January 2011 - March 2011
Hart Automation March 2009 - January 2011
Freelance Musician and Educator February 2005 - December 2010
Education
Queensland University of Technology 2006 — 2010
Bachelor of Music, Music Performance
Philadelphia District Attorney's Office September 2014 - November 2014
Education Law Center June 2014 - August 2014
Pennsylvania Institutional Law Project January 2014 - May 2014
UNSW Australia September 2012 - December 2012
Skills
Microsoft Office, Report Writing, Microsoft Excel, Legal Research, PowerPoint, Qualitative Research, LexisNexis, Criminal Law, Policy Analysis, Data Analysis, SPSS
Education
Temple University 2013 — 2014
Bachelors Degree, Criminal Justice, 3.8
Ursinus College 2010 — 2013
Sociology
Nano Precision Medical March 2015 - Present
UNSW Australia July 2014 - December 2014
Bay Area IP March 2013 - July 2014
VIRES Aeronautics October 2013 - May 2014
Calnetix Technologies May 2013 - August 2013
Helix Electric January 2013 - January 2013
Skills
Microsoft Office, Solidworks, Matlab, Microsoft Excel, PowerPoint, Microsoft Word, Mechanical Engineering, AutoCAD, Engineering, SolidWorks, Manufacturing..., CAD
Education
UC Berkeley 2012 — 2016
Bachelor's degree, Mechanical Engineering
UNSW Australia 2014 — 2014
WAREHOUSE productions - Event Consulting Group 2006 - Present
lululemon athletica 2015 - Present
Competitor Group August 2013 - Present
Mass Gathering Medicine Interest Group, UBC Department of Emergency Medicine 2013 - Present
Rockdoc Consulting Inc. 2011 - January 2015
Vancouver International Marathon Society June 2011 - September 2012
VANOC 2009 - 2010
King George International College 2002 - 2007
UNSW Australia 1999 - 2000
Charles Sturt University 1998 - 1999
Skills
Leadership, Process Improvement, Financial Analysis, Event Planning, Non-profits, Event Management, Sponsorship, Corporate Events, Social Media, Budgets, Volunteer Management, Fundraising, Marketing, Marketing Strategy, Sports, Social Media Marketing, Contract Negotiation, Team Building, Passion to Succeed, Community Outreach, Teamwork, Research, Project Planning, Project Management, Customer Service, Public Speaking, Nonprofits, Social Networking, Production Managment, Public Relations, Press Releases, Time Management, Business Strategy, Management, Coaching, Sports Marketing, Sports Management, Advertising, Entertainment, Strategic Planning, Trade Shows, Media Relations
Education
Oregon State University
BSc, Kinesiology, Education
Rockwell Group August 2014 - Present
UNSW Australia June 2011 - December 2013
DUyCM October 2010 - June 2011
Robert D. Henry Architects July 2008 - July 2009
Stephen Alton Architect, P.C. March 2005 - July 2008
CMX December 2002 - January 2005
Robert Rich Associates June 2000 - June 2002
RDG Planning & Design January 1999 - March 2000
Skills
CAD, Architectural Design, Architectural Drawings, SketchUp, Urban Design, Rendering, Mixed-use, Sustainable Design, Comprehensive Planning, Space Planning, Residential Design, Construction Drawings, Urban, Concept Design, Sketching, Urban Planning, Design Research
Education
University of New South Wales 2009 — 2010
Master Degree, Urban Design and Development
City University of New York-Hunter College 2000 — 2007
Bachelors of Arts, Urban Studies, Studio Art Minor
Arizona State University 2002 — 2004
Urban Planning and Landscape Architecture
Anthem College-Phoenix 1997 — 1998
Technical Degree in Architectural Drafting, Architectural Drafting and Architectural CAD/CADD, 4.0 GPA
City College of New York Psychological Center August 2014 - September 2015
UNSW Australia August 2013 - May 2014
Refugee Trauma and Recovery Program, UNSW August 2013 - May 2014
NYU Langone Medical Center June 2012 - August 2013
Gettysburg College Psychology January 2012 - June 2013
Weill Cornell Medical College June 2011 - August 2011
Skills
Statistics, Qualitative Research, SPSS, Psychology, Research, Data Analysis, Social Media, Social Networking, Mental Health
Education
Gettysburg College 2009 — 2013
Bachelor of Arts (BA), Psychology and Neuroscience
Syracuse University Florence 2011 — 2011
Poly Prep Country Day School 2002 — 2009
Diploma
Aptar Pharma (ex Valois)- Prescription Division, North America July 2006 - Present
Taree Pharma (www.tareepharma.com) October 2004 - June 2006
ATMI Packaging, Inc October 2003 - October 2004
Baxter Healthcare Corporation March 2002 - August 2003
Baxter Healthcare Corporation March 2000 - March 2002
Biodome America November 1997 - March 2000
Packaging Technologies and Inspection 1995 - 1997
Kellogg Company 1984 - 1992
Kellogg (Aust) 1984 - 1992
UNSW Australia 1980 - 1983
Skills
Pharmaceuticals, FDA, Pharmaceutical Industry, Validation, Quality System, Pharmaceutics, Biotechnology, GMP, Cross-functional Team..., R&D, Drug Delivery, Regulatory Affairs, Quality Assurance, Business Development, Product Launch
Education
Project Management Institute 2003 — 2005
PMP
Rutgers University 1993 — 1995
Masters
UNSW Australia 1988 — 1990
Master of Commerce
IBM Almaden Research Center August 2013 - Present
UNSW Australia February 2015 - Present
University of New South Wales October 2008 - January 2015
UniCitizen, Inc. March 2013 - May 2014
Hewlett-Packard Laboratories October 2008 - March 2013
Université Blaise Pascal December 2012 - December 2012
University of New South Wales January 2008 - October 2008
NICTA 2004 - 2007
IBM TJ Watson Research Center 2006 - 2006
Skills
Business Intelligence, Machine Learning, Computer Science, Social Computing, Enterprise-wide..., Process Management, Software Engineering, Data Mining, Algorithms, Semantic Web, Programming, Distributed Systems, Cloud Computing, Artificial Intelligence, SOA, Natural Language..., Software Development, SaaS, Information Retrieval, Big Data, MySQL, Text Mining, Software Design, Human Computer..., Recommender Systems, Java, Algorithm Design, Open Source, Semantic Technologies, Ontologies, Scalability, LaTeX, Social Network Analysis, UML
Education
Stanford GSB 2012 — 2012
Certificate, Stanford Ignite: Powering Innovation and Entrepreneurship
University of New South Wales 2004 — 2007
PhD, Computer Science and Engineering
Amirkabir University of Technology - Tehran Polytechnic 2000 — 2002
MSc, Software Engineering and AI
University of Pennsylvania January 2015 - Present
UNSW Australia July 2014 - December 2014
University of Pennsylvania August 2011 - June 2014
Hunter College August 2007 - August 2011
Queens College August 2009 - June 2011
Queens College August 2006 - June 2009
Skills
Psycholinguistics, Experimental Research, Eye Tracking, SPSS, R, Questionnaire Design, Experimental Design, Teaching, Excel, Photoshop, Research, Research Design, Higher Education, Qualitative Research, University Teaching, Statistics, Lecturing, Data Analysis, Science, Academic Writing, Grant Writing, Linguistics
Education
City University of New York Graduate Center 2005 — 2011
Doctor of Philosophy (Ph.D.), Linguistics
Università degli Studi di Siena 2003 — 2005
Master of Arts (MA), Linguistics
Università degli Studi di Siena 1999 — 2003
Bachelor of Arts (BA), Spanish and Iberian Studies
Enablon December 2014 - Present
Enablon North America October 2013 - Present
Enablon France January 2012 - September 2013
UNSW Australia July 2010 - December 2011
Société Générale Corporate and Investment Banking February 2009 - July 2010
ORSYP June 2008 - August 2008
Skills
Excel, French, Unix, International Business, Business Strategy, Change Management, Team Leadership, Project Management, Microsoft Excel, Management, English, Business Analysis, Strategy, MySQL, Program Management, Business Intelligence, Risk Management, Security, Requirements Analysis, Analysis, Software Project..., Databases, SQL
Education
University of New South Wales 2010 — 2011
Master's Degree
Ecole supérieure d'Informatique, Electronique et Automatique 2004 — 2009
Master's Degree
Anglia Ruskin University 2007 — 2007
Bachelor's degree (Study Abroad programme)
Lycée de Montgeron 2001 — 2004
Baccalaureat
UNSW Australia December 2012 - Present
UNSW Australia October 2012 - December 2012
Regis University June 2010 - October 2012
Colorado Alliance of Research Libraries June 2010 - October 2012
Skills
Library, Information Literacy, Cataloging, Library Science, Copy Editing, Research, Digital Libraries
Education
University of Denver 2007 — 2009
Master's Degree, Library and Information Science
Western State Colorado University 2000 — 2005
Bachelor's Degree, History
Research institute of Hydro-Québec July 2015 - Present
Research institute of Hydro-Québec February 2015 - July 2015
UQAM January 2011 - January 2015
UNSW Australia June 2014 - December 2014
Education
2006 — 2010
Master, Chimie spécialités Polymères et Colloïdes
Université Bordeaux I 2005 — 2010
Master 2, Polymères et Colloïdes