More Information on Light Pollution
|
|
|
- Harold Butler
- 10 years ago
- Views:
Transcription
1 More Information on Light Pollution About Light Pollution Light Pollution is a form of environmental degradation. The wasteful light from outdoor manmade light sources emitted directly upwards or reflected from the ground can pollute the entire sky through scattering by clouds, fog, and pollutants like suspended particulates in the atmosphere. Thus the night sky brightness is an indicator of the level of light pollution. Light pollution not only rids us of the starry night sky, it also indicates a waste of electric energy and damages the natural and our living environment. About Hong Kong Night Sky Brightness Monitoring Network and Sky Quality Meter The night sky brightness data of Hong Kong Night Sky Brightness Monitoring Network is measured by a portable and easy-to-use instrument called the Sky Quality Meter (SQM). Imported from Canada, the SQM is a playing-card size device which instantly gives accurate sky brightness values. Started in May 2010, the data are taken with 17 SQMs collected every minute at 18 observing sites. About the international standard of dark sky The international standard of dark sky was established by the International Astronomical Union in 1979 and refers the brightness of a dark moonless sky not suffering from light pollution by artificial lightings. It is defined to be a night sky brightness level at zenith of 21.6 mag/arcsec 2. The 12 urban stations of NSN reported an average sky brightness of 15.6 mag/arcsec 2, between 8:30-11:00pm, while the 6 rural stations reported an average of 18.0 mag/arcsec 2. About mag/arcsec 2 mag/arcsec 2 (magnitude per arc second square) is an international unit of sky brightness. The brighter the sky, the smaller is the magnitude and vice versa. This unit is in logarithmic scale, meaning that 1 unit difference implies a brightness ratio of about while difference of 5 magnitudes is defined to imply a brightness ratio of exactly 100. Remark: The Hong Kong Night Sky Brightness Monitoring Network was organized by the Department of Physics of The University of Hong Kong and the co-organizers include the Hong Kong Observatory, Hong Kong Space Museum, Hong Kong Astronomical Society, Ho Koon Nature Education cum Astronomical Centre (Sponsored by Sik Sik Yuen), and The Camping Association of Hong Kong, China, Ltd.
2 Figure Captions HKU s Hong Kong Night Sky Brightness Monitoring Network (NSN) measures the night sky brightness continuously, helping the scientists to master the light pollution properties in Hong Kong. This map shows the location of monitoring stations, and their averaged night sky brightness during the period 8:30-11:00pm.
3 The appearance of a monitoring station. This plot shows the average nightly variation of night sky brightness in Hong Kong as measured by the NSN. The average urban night skies (solid curves) were brighter than the international standard of dark sky by 100 to 1,000 times during 8:30-11pm, while the rural night skies (dash curves) were brighter than the standard by times over the same period. Sky brightness in urban areas, such as Tsim Sha Tsui and King s Park, can be seen to drop near 11pm, 12am, and 1am every night, similar to the timing pattern of manmade lightings.
4 The website of the NSN, displaying real-time light pollution level measured by the observing stations around Hong Kong. Mobile version of the NSN website, designed for smart phone users to check real-time night sky brightness at different observing stations.
5 The video illustrates the changes in the lighting environment and in the sky brightness during a clear night in Tsim Sha Tsui and rural Sai Kung. Link: (all sky imagery provided by the Hong Kong Space Museum)
Birriel et al., JAAVSO Volume 38, 2010
132 Documenting Local Night Sky Brightness Using Sky Quality Meters: An Interdisciplinary College Capstone Project and a First Step Toward Reducing Light Pollution Jennifer Birriel Department of Mathematics,
Working paper: Sky Quality Meter cross-calibration in the BMP project
Working paper: Sky Quality Meter cross-calibration in the BMP project Francesco Giubbilini, Andrea Giacomelli March 2011 Abstract The BMP project (where BMP comes from BuioMetria Partecipativa, i.e. Participatory
The Contribution of Street Lighting to Light Pollution
The Contribution of Street Lighting to Light Pollution Peter D Hiscocks, Royal Astronomical Society, Toronto Centre, Canada Sverrir Guðmundsson, Amateur Astronomical Society of Seltjarnarnes, Iceland April
Housing of Robotic Telescopes Hosting
Housing of Robotic Telescopes Hosting www.e-eye.es 2 Entre Encinas y Estrellas HOSTING AND HOUSING OF ROBOTIC TELESCOPES e-eye has built modular observatories with cutting edge technology that can be controlled
Hong Kong Observatory Summer Placement Programme 2015
Annex I Hong Kong Observatory Summer Placement Programme 2015 Training Programme : An Observatory mentor with relevant expertise will supervise the students. Training Period : 8 weeks, starting from 8
RESULTS FROM A SIMPLE INFRARED CLOUD DETECTOR
RESULTS FROM A SIMPLE INFRARED CLOUD DETECTOR A. Maghrabi 1 and R. Clay 2 1 Institute of Astronomical and Geophysical Research, King Abdulaziz City For Science and Technology, P.O. Box 6086 Riyadh 11442,
Beginning of the Universe Classwork 6 th Grade PSI Science
Beginning of the Universe Classwork Name: 6 th Grade PSI Science 1 4 2 5 6 3 7 Down: 1. Edwin discovered that galaxies are spreading apart. 2. This theory explains how the Universe was flattened. 3. All
Mathematics Society, SS, HKUSU. Year Plan of Session 2010-2011
Mathematics Society, SS, HKUSU Year Plan of Session 2010-2011 Definition 1. HKU shall mean The University of Hong Kong. 2. Society shall mean the Mathematics Society, SS, HKUSU. 3. Department shall mean
For further information, and additional background on the American Meteorological Society s Education Program, please contact:
Project ATMOSPHERE This guide is one of a series produced by Project ATMOSPHERE, an initiative of the American Meteorological Society. Project ATMOSPHERE has created and trained a network of resource agents
Stow Lighting Advisory Subcommittee Terminology Guide
Stow Lighting Advisory Subcommittee Terminology Guide Stow Lighting Advisory Subcommittee Terminology Guide Page 1 of 9 Revision Date Description 1.0 5 Feb 2003 Beginning of first draft. 1.1 5 Mar 2003
Hotel Accommodation, Catering and Transportation for the 37th Hong Kong International Film Festival. Specifications
Hotel Accommodation, Catering and Transportation for the 37th Hong Kong International Film Festival (Tender Ref. HKIFF 37-03) Specifications A. Location Hong Kong or Kowloon, preferably with easy access
Environmental Impact Assessment Ordinance (Cap. 499) Environmental Impact Assessment Report Sludge Treatment Facilities
40/F, Revenue Tower, 5 Gloucester Road, Wan Chai, Hong Kong 香 港 灣 仔 告 士 打 道 5 號 稅 務 大 樓 40 樓 ACE-EIA Paper 2/2009 For advice Environmental Impact Assessment Ordinance (Cap. 499) Environmental Impact Assessment
Chapter 6 Telescopes: Portals of Discovery. How does your eye form an image? Refraction. Example: Refraction at Sunset.
Chapter 6 Telescopes: Portals of Discovery 6.1 Eyes and Cameras: Everyday Light Sensors Our goals for learning:! How does your eye form an image?! How do we record images? How does your eye form an image?
Product Catalogue. DynaFrame is the best way to light your banner! www.conceptglo.com
Product Catalogue DynaFrame is the best way to light your banner! www.conceptglo.com >> About Us conceptglo is a team of young and energetic professionals coming from the industry dedicated to provide
More efficiency in hotels with HVAC, lighting and security
The worldwide standard for home and building control More efficiency in hotels with HVAC, lighting and security Simply comfortable: Higher energy efficiency and more flexibility thanks to Synco HVAC controllers
The Celestial Sphere. Questions for Today. The Celestial Sphere 1/18/10
Lecture 3: Constellations and the Distances to the Stars Astro 2010 Prof. Tom Megeath Questions for Today How do the stars move in the sky? What causes the phases of the moon? What causes the seasons?
Artificial Satellites Earth & Sky
Artificial Satellites Earth & Sky Name: Introduction In this lab, you will have the opportunity to find out when satellites may be visible from the RPI campus, and if any are visible during the activity,
Data Analysis for Healthcare: A Case Study in Blood Donation Center Analysis
: A Case Study in Blood Donation Center Analysis Michael Chau School of Business The University of Hong Kong [email protected] Chi Wai Chan School of Business The University of Hong Kong [email protected]
Winter/Spring 2014 SBMT 3210B T1 GLOBAL Investigation and Security Consultancy Ltd Business Project
Project Introduction and Guidelines The Business Project (SBMT3210) provides an invaluable opportunity for to work in teams with a corporation/organization on a project that allows them to apply concepts,
Energy from Waste Combined Heat and Power Facility, North Yard, Devonport. Community Ambient Air Quality Monitoring Programme Report Quarter 4, 2015
Energy from Waste Combined Heat and Power Facility, North Yard, Devonport Community Ambient Air Quality Monitoring Programme Report Quarter 4, 2015 Overview of Monitoring Programme MVV started ambient
More efficiency in office buildings with HVAC, lighting and security
The worldwide standard for home and building control More efficiency in office buildings with HVAC, lighting and security Simply more productive: Higher energy efficiency and more flexibility thanks to
ABSTRACT INTRODUCTION
Observing Fog And Low Cloud With A Combination Of 78GHz Cloud Radar And Laser Met Office: Darren Lyth 1, John Nash. Rutherford Appleton Laboratory: M.Oldfield ABSTRACT Results from two demonstration tests
Electromagnetic Radiation (EMR) and Remote Sensing
Electromagnetic Radiation (EMR) and Remote Sensing 1 Atmosphere Anything missing in between? Electromagnetic Radiation (EMR) is radiated by atomic particles at the source (the Sun), propagates through
The Earth, Sun, and Moon
reflect The Sun and Moon are Earth s constant companions. We bask in the Sun s heat and light. It provides Earth s energy, and life could not exist without it. We rely on the Moon to light dark nights.
ECON 103, 2008-2 ANSWERS TO HOME WORK ASSIGNMENTS
ECON 103, 2008-2 ANSWERS TO HOME WORK ASSIGNMENTS Due the Week of May 12 Chapter 1 WRITE [7] Suppose you won $15 on a Lotto Canada ticket at the local 7-Eleven and decided to spend all the winnings on
Holy Family Canossian College Second Term Test 2002-2003 Form 1 English
1 Holy Family Canossian College Second Term Test 2002-2003 Form 1 English Time allowed: 40 mins Full marks: 70 Instructions: 1. Read all the questions carefully and write your answers CLEARLY on the answer
DuPont Freon REFRIGERANTS
DuPont Freon REFRIGERANTS Technical Information T-12 SI Thermodynamic Properties of DuPont Freon 12 (R-12) Refrigerant Thermodynamic Properties of DuPont Freon 12 (R12) SI Units Tables of the thermodynamic
1. Theoretical background
1. Theoretical background We consider the energy budget at the soil surface (equation 1). Energy flux components absorbed or emitted by the soil surface are: net radiation, latent heat flux, sensible heat
Energy Pathways in Earth s Atmosphere
BRSP - 10 Page 1 Solar radiation reaching Earth s atmosphere includes a wide spectrum of wavelengths. In addition to visible light there is radiation of higher energy and shorter wavelength called ultraviolet
Vpon Mobile Ad. 2014 Q1 Hong Kong Mobile Advertising Statistics and Trend
Vpon Mobile Ad 2014 Q1 Hong Kong Mobile Advertising Statistics and Trend AGENDA HONG KONG MOBILE MARKET - MOBILE DEVICE MARKET SHARE - ANDROID/iOS SMARTPHONE, PHABLET AND TABLE HONG KONG USER BEHAVIOR
Hong Kong Mobile Market. Users Behavioral Pattern. Mobile Campaign Optimization
Hong Kong Mobile Market Users Behavioral Pattern Mobile Campaign Optimization Case Study Men s Shaving Product Case Study Mobile Game App Download Hong Kong Mobile Market Android Vs ios Android 62.0% ipad
Activity 10 - Universal Time
Activity 10 - Universal Time Teacher s Guide Scientists use the Universal Time reference to talk about data that is taken around the globe. Universal Time is the time kept in the time zone centered on
How To Understand The City Of Hong Kong
OGCIO Seminar on PSI/Data.One PSI and Big Data Jiannong Cao Department of Computing Hong Kong Polytechnic University Big Data TB (10 12 bytes) PB (10 15 bytes) EB (10 18 bytes) ZB (10 21 bytes)... The
Optical Blade Position Tracking System Test
National Renewable Energy Laboratory Innovation for Our Energy Future A national laboratory of the U.S. Department of Energy Office of Energy Efficiency & Renewable Energy Optical Blade Position Tracking
Nowcasting of significant convection by application of cloud tracking algorithm to satellite and radar images
Nowcasting of significant convection by application of cloud tracking algorithm to satellite and radar images Ng Ka Ho, Hong Kong Observatory, Hong Kong Abstract Automated forecast of significant convection
The Effect of Droplet Size Distribution on the Determination of Cloud Droplet Effective Radius
Eleventh ARM Science Team Meeting Proceedings, Atlanta, Georgia, March 9-, The Effect of Droplet Size Distribution on the Determination of Cloud Droplet Effective Radius F.-L. Chang and Z. Li ESSIC/Department
Antenna Properties and their impact on Wireless System Performance. Dr. Steven R. Best. Cushcraft Corporation 48 Perimeter Road Manchester, NH 03013
Antenna Properties and their impact on Wireless System Performance Dr. Steven R. Best Cushcraft Corporation 48 Perimeter Road Manchester, NH 03013 Phone (603) 627-7877 FAX: (603) 627-1764 Email: [email protected]
a) species of plants that require a relatively cool, moist environment tend to grow on poleward-facing slopes.
J.D. McAlpine ATMS 611 HMWK #8 a) species of plants that require a relatively cool, moist environment tend to grow on poleward-facing slopes. These sides of the slopes will tend to have less average solar
Allied Environmental Consultants Limited Green Building Certification and Consultancy Project Job Reference
- BEAM CNSULTANCY SERVICES - Description Location Rating proposed development at 1 Austin Rd W, West Kowloon, Kowloon, Hong Kong Kowloon BEAM Plus Environmental Consultancy Services for the Proposed ffice
Technical seminar - Modern Technology for Solid Waste Management
Technical seminar - Modern Technology for Solid Waste Management co-organized by: Hong Kong Waste Management Association Environmental Division of Hong Kong Institute of Engineers Preparations at Wembley
Event Management (Cycle 3)
Advanced Diploma Programme in Event Management (Cycle 3) 會 展 及 活 動 管 理 高 等 文 憑 課 程 ( 第 三 屆 ) All modules of the programme have been included in the list of reimbursable courses for CEF purposes. Introduction
北 京 發 展 ( 香 港 ) 有 限 公 司 BEIJING DEVELOPMENT (HONG KONG) LIMITED (Incorporated in Hong Kong with limited liability) (Stock Code: 154)
Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement, make no representation as to its accuracy or completeness
Sky Trend C.P.A. Co., Limited (Certified Public Accountants)
(Sky Trend - since 1996) Sky Trend C.P.A. Co., Limited (Certified Public Accountants) 天 正 會 計 師 事 務 所 有 限 公 司 Why invest in Hong Kong? Hong Kong is a leading international financial centre and a preferred
Metrological features of a beta absorption particulate air monitor operating with wireless communication system
NUKLEONIKA 2008;53(Supplement 2):S37 S42 ORIGINAL PAPER Metrological features of a beta absorption particulate air monitor operating with wireless communication system Adrian Jakowiuk, Piotr Urbański,
HEATED INLET SAMPLE CONDITIONING EFFECTS ON REMOTE DUST MONITORING
HEATED INLET SAMPLE CONDITIONING EFFECTS ON REMOTE DUST MONITORING APPLICATION NOTE EXPMN-8 (A4) Introduction Under high ambient humidity conditions, photometric mass measurements have been reported to
TEMPORARY CONSTRUCTION SIGN FOR RURAL DEVELOPMENT PROJECTS WHITE BACKGROUND
TEMPORARY CONSTRUCTION SIGN FOR RURAL DEVELOPMENT PROJECTS Sponsor / Developer Official(s) or Sponsor Address Architect or Engineer (second line) Contractor TOWNSCAPE AND LETTER FORMS (BLUE, PMS 288) ROLLING
Water Supplies Department Active WSD Capital Works Contracts
No. Title Active WSD Capital s Location of or Start 17/WSD/14 Improvement to waterworks facilities at Lantau South and Sha Tin Fuk Shing 42.600 16-Nov-15 Nov-18 Lantau South and mainlaying at Keung South
The role of local, decentralised energy solutions is too often overlooked in the context of current EU policy priorities to increase energy supply
The role of local, decentralised energy solutions is too often overlooked in the context of current EU policy priorities to increase energy supply security while attaining climate change goals. This presentation
CAMBIUM POINT-TO-MULTIPOINT SOLUTIONS CONNECT YOUR WORLD
CONNECT YOUR WORLD CONNECT EVERYONE EVERYWHERE Whatever your world looks like, you need high-speed voice, data and video communications serving multiple people in multiple locations. What s the optimal
How to do business for Hong Kong OTG
How to do business for Hong Kong OTG 1. Background Hong Kong OTG Operating Currency: Hong Kong Dollar (HKD $) Region s Formal Name: Hong Kong Special Administrative Region (SAR) Estimated Population: 7
Stock Exchange HKSCC Prospectus U.S. Securities Act Stabilizing Manager
Hong Kong Exchanges and Clearing Limited, The Stock Exchange of Hong Kong Limited (the Stock Exchange ) and Hong Kong Securities Clearing Company Limited ( HKSCC ) take no responsibility for the contents
ATM S 111, Global Warming: Understanding the Forecast
ATM S 111, Global Warming: Understanding the Forecast DARGAN M. W. FRIERSON DEPARTMENT OF ATMOSPHERIC SCIENCES DAY 1: OCTOBER 1, 2015 Outline How exactly the Sun heats the Earth How strong? Important concept
CHAPTER 4 RADIATION MONITORING AND ASSESSMENT
CHAPTER 4 RADIATION MONITORING AND ASSESSMENT RADIATION MONITORING IN NORMAL TIMES 4.1 HKO has established an on-going Environmental Radiation Monitoring Programme (ERMP) to determine long-term changes
7 Figures and Tables` Death Rate 90 100 110 120 130 Figure 1: Trends in Cancer Rates in China 1991 1994 1997 2000 Year Cancer Rate, Rural Cancer Rate, Urban Source: China DSP. Graphs displayed are created
Description of the Dark Energy Survey for Astronomers
Description of the Dark Energy Survey for Astronomers May 1, 2012 Abstract The Dark Energy Survey (DES) will use 525 nights on the CTIO Blanco 4-meter telescope with the new Dark Energy Camera built by
Buying Your First Telescope By Mike Usher
Buying Your First Telescope By Mike Usher The first thing to understand is that a telescope is a high quality optical device and high quality optical devices are not inexpensive. Second mortgages are not
Beat Alcohol and Drug Addiction Quickly and Easily, FOREVER!!! FACTS:
Beat Alcohol and Drug Addiction Quickly and Easily, FOREVER!!! THIS is the alcohol and drug addiction solution the experts don t want you to find out about! FACTS: People can drink or drug abusively and
As of 1 June 2011 Corporate Communications Department Company Sony Corporation of Hong Kong Limited
Company Sony Corporation of Hong Kong Limited Managing Director Masahiko Kusakabe Date of Establishment 23 November 1962 Location Suite 3301, 33/F, Tower 1, The Gateway, 25 Canton Road, Tsim Sha Tsui Kowloon,
A COMPACT MODEL FOR PREDICTING ROAD TRAFFIC NOISE
Iran. J. Environ. Health. Sci. Eng., 2009, Vol. 6, No. 3, pp. 181-186 A COMPACT MODEL FOR PREDICTING ROAD TRAFFIC NOISE 1* R. Golmohammadi, 2 M. Abbaspour, 3 P. Nassiri, 4 H. Mahjub 1 Department of Occupational
What Can U-Vision Do For You?
What Can U-Vision Do For You? Get to know your university s friendly & free multimedia communications platform Lillian Tam Assistant Manager (Multimedia) Communications and Public Affairs Office The University
Radiative effects of clouds, ice sheet and sea ice in the Antarctic
Snow and fee Covers: Interactions with the Atmosphere and Ecosystems (Proceedings of Yokohama Symposia J2 and J5, July 1993). IAHS Publ. no. 223, 1994. 29 Radiative effects of clouds, ice sheet and sea
GoHome Serviced Apartment Awards 2015 Winners Announcement
GoHome Serviced Apartment Awards 2015 Winners Announcement Mobile Residents increased by 11% in the past four years Savills: 5% rise in rent this year Hong Kong, 24 March 2014 GoHome.com.hk, Hong Kong
Definition of the community standard for skyglow observations
Definition of the community standard for skyglow observations Version 1.0 April 10, 2013 This document describes Version 1.0 of the community standard for measurements of skyglow, and is a supplement to
Contrast ratio what does it really mean? Introduction...1 High contrast vs. low contrast...2 Dynamic contrast ratio...4 Conclusion...
Contrast ratio what does it really mean? Introduction...1 High contrast vs. low contrast...2 Dynamic contrast ratio...4 Conclusion...5 Introduction Contrast, along with brightness, size, and "resolution"
Overview. What is EMR? Electromagnetic Radiation (EMR) LA502 Special Studies Remote Sensing
LA502 Special Studies Remote Sensing Electromagnetic Radiation (EMR) Dr. Ragab Khalil Department of Landscape Architecture Faculty of Environmental Design King AbdulAziz University Room 103 Overview What
CHAPTER 6 INSTRUMENTATION AND MEASUREMENTS 6.1 MEASUREMENTS
CHAPTER 6 INSTRUMENTATION AND MEASUREMENTS 6.1 MEASUREMENTS Atmospheric electricity is a field that is very easy to get into because it does not require a large capital investment for measuring equipment.
Origins of the Cosmos Summer 2016. Pre-course assessment
Origins of the Cosmos Summer 2016 Pre-course assessment In order to grant two graduate credits for the workshop, we do require you to spend some hours before arriving at Penn State. We encourage all of
Implications of the 12 th Five-Year Programme for Hong Kong Businesses
Implications of the 12 th Five-Year Programme for Hong Kong Businesses Wing Chu Economist April 2011 2 Energy conservation and environmental protection: a priority in 12 th Five-Year Programme Rapid economic
CHAPTER 2 Energy and Earth
CHAPTER 2 Energy and Earth This chapter is concerned with the nature of energy and how it interacts with Earth. At this stage we are looking at energy in an abstract form though relate it to how it affect
Basic Network Design
Frequency Reuse and Planning Cellular Technology enables mobile communication because they use of a complex two-way radio system between the mobile unit and the wireless network. It uses radio frequencies
Astrophysics with Terabyte Datasets. Alex Szalay, JHU and Jim Gray, Microsoft Research
Astrophysics with Terabyte Datasets Alex Szalay, JHU and Jim Gray, Microsoft Research Living in an Exponential World Astronomers have a few hundred TB now 1 pixel (byte) / sq arc second ~ 4TB Multi-spectral,
MobileMapper 6 White Paper
MobileMapper 6 White Paper Meter-Level Mapping Accuracy With Post-Processing Introduction Since its introduction in February 2008, the Magellan MobileMapper 6 has been welcomed by the market as the only
Measuring Skyglow with Digital Cameras
astrophotography Measuring Skyglow with Digital Cameras These instruments are designed to take pretty pictures, but you can also do science with them. By Tony Flanders amateur astronomers have lots of
Using Photometric Data to Derive an HR Diagram for a Star Cluster
Using Photometric Data to Derive an HR Diagram for a Star Cluster In In this Activity, we will investigate: 1. How to use photometric data for an open cluster to derive an H-R Diagram for the stars and
TREEHOUSING 2 GRAND PRIZES OF $6,000 2 PRIZES OF $3,000 2 STUDENT PRIZES OF $2,000
TREEHOUSING INTERNATIONAL WOOD DESIGN COMPETITION XIV WORLD FORESTRY CONGRESS DURBAN SOUTH AFRICA 2 GRAND PRIZES OF $6,000 2 PRIZES OF $3,000 2 STUDENT PRIZES OF $2,000 REGISTRATION DEADLINE SUBMISSION
Empirical study of the temporal variation of a tropical surface temperature on hourly time integration
Global Advanced Research Journal of Physical and Applied Sciences Vol. 4 (1) pp. 051-056, September, 2015 Available online http://www.garj.org/garjpas/index.htm Copyright 2015 Global Advanced Research
Motion Graphs. Plotting distance against time can tell you a lot about motion. Let's look at the axes:
Motion Graphs 1 Name Motion Graphs Describing the motion of an object is occasionally hard to do with words. Sometimes graphs help make motion easier to picture, and therefore understand. Remember: Motion
Light Control and Efficacy using Light Guides and Diffusers
Light Control and Efficacy using Light Guides and Diffusers LEDs 2012 Michael Georgalis, LC Marketing Manager, Fusion Optix October 11, 2012 Agenda Introduction What Is Light Control? Improves Application
GRANULAR ACTIVATED CARBON FOR WATER & WASTEWATER TREATMENT
GRANULAR ACTIVATED CARBON FOR WATER & WASTEWATER TREATMENT CARBTROL Corporation September 1992 Rev. 10/92 TP-3 INTRODUCTION Carbon has been used as an adsorbent for centuries. Early uses of carbon were
A PHOTOGRAMMETRIC APPRAOCH FOR AUTOMATIC TRAFFIC ASSESSMENT USING CONVENTIONAL CCTV CAMERA
A PHOTOGRAMMETRIC APPRAOCH FOR AUTOMATIC TRAFFIC ASSESSMENT USING CONVENTIONAL CCTV CAMERA N. Zarrinpanjeh a, F. Dadrassjavan b, H. Fattahi c * a Islamic Azad University of Qazvin - [email protected]