He joined CMU in 1983 after receiving a PhD in engineering from the California Institute of Technology (Caltech). A major focus of Professor McRae's research is understanding the scientific aspects of problems involving the transport and transformation of pollutants in multimedia environments. His other interests include: combined sensitivity and uncertainty analysis of complex systems, nonlinear parameter estimation, combinatorial optimization, numerical analysis, symbolic and algorithmic knowledge-based systems, parallel computing, and design of cost-effective robust environmental controls.
Professor McRae is the recipient of numerous awards and honors for his research in environmental science, including: the prestigious Presidential Young Investigator Award, the AAAS George Tallman Ladd Research and Fellowship Award in Environmental Science, and the 1989 SIAM Forefronts of Computational Science Award. Sigma Xi, American Chemical Society and American Institute of Chemical Engineers. In addition, he serves on the editorial board of the International Journal of Supercomputer Applications, the advisory board for the Pittsburgh Supercomputing Center, and several government and White House task forces on environmental issues.
He has visited researchers at the National Center of Atmospheric Research and the IBM T J Watson Research Centre. Air quality problems in California (especially Los Angeles) were seen as oxidants, acid aerosols and particulate matter. Over the years, although many pollutant concentrations had been reduced (lead, CO, etc.), oxidant levels had remained stable as the effect of controls had been offset by increased population growth and density, although peaks had been shaved.
In this area, organic matter control appeared to affect the timing and location of high oxidant concentrations rather than their level. The role of diurnal feedback from smog precursors lingering in the upper atmosphere on calm nights was described and illustrated in a video recording of the supercomputer output. Professor McRae also discussed aspects of methanol and other alternative fuels, the link between air pollution problems and energy consumption patterns, the evaluation of uncertainty, the need for robust controls and the need to closely link science and policy.
Under the Title Towards the 21st Century will be held in Pretoria, South Africa on October 24-26, 1990. The 84th Annual Meeting and Exhibition of the Air and Waste Management Association will be held in Vancouver, BC, Canada from June. More than 5,000 delegates are expected to attend this meeting to hear 700 papers in 150 sessions on topics of interest to the air and waste management industry.
This major conference follows a very successful 83rd Annual Meeting held in June 1990 in Pittsburgh, where CASANZ members Mike Bulloy and Ken Sullivan both made great presentations. If you would like to propose a session, please send a fax to Dr. Kathryn Kelly of Environmental Toxicology International, Inc., in Seattle, Washington (fax outlining the proposed session title, a brief description of the objectives of the session, and ' a list of potential or proposed speakers as well as the name, affiliation and address of the proposed session chair After the sessions have been arranged, check upcoming issues of Skoon Lug for a call.
THOMAS FOR TIMERS
We specialize in the design and application of Timing and Control Systems and carry a range of timers
REVERSE PULSE JET REVERSE AIR AND
SHAKER DUST COLLECTORS
Thomas Electronics Pty. Ltd
PM-10 MEASUREMENTS USING THE TAPERED ELEMENT OSCILLATING
MICROBALANCE
Patashnick, G. Rupprecht
INTRODUCTION
DESCRIPTION OF THE TEOM AMBIENT PARTICULATE MATTER
If the TEOM system is not a harmonic oscillator, the linear relationship as expressed in equation 16 will not hold. How linear this relationship is can be assessed by a least-squares fit of the data through the correlation coefficient, r. This evaluation is valid for mass ranges significantly larger than the mass charge for the TEOM abmient monitor.
The TEOM ambient particulate matter monitor determines the particulate mass concentration in real time by continuously measuring the mass uptake on the collection filter and combining this measurement with the flow rate through the filter (or tapered element). In this case, a flow divider and second flow controller are added to the TEOM system to bypass 13.7 1/min and provide a 3.0 1/min flow through the TEOM filter, thus bringing the flow within the working range of the mass detector. retain. In order to standardize both the sampling and weighing conditions in the TEOM ambient particulate system, the filter and the air stream passing through it are kept at a constant 50°C.
It is impossible to perform 24-hour pre-conditioning and post-conditioning of the filter in the device in real time. Because of these differences, we would expect a slight deviation when comparing the results of the TEOM monitor and the reference samplers. This adjustment is introduced because the reference technique results in a "wetter" measurement than the TEOM system operating at a constant 50 °C.
The TEOM Ambient Particulate Monitor offers a choice of averaging times from 10 minutes to 24 hours. In addition, the TEOM Ambient Particulate Monitor is a candidate instrument for EPA certification as an equivalent method for PM-10 sampling. Tests were conducted at numerous sites to demonstrate the correlation between the TEOM continuous monitor and the EPA designated reference samplers.
The correlation coefficients, slopes, and intercepts resulting from a regression analysis of the results are well within the EPA. Further testing by the Norwegian Institute for Air Research between the TEOM monitor and the Sierra-Andersen dichotomous PM-10 sampler again demonstrates the equivalence of the TEOM instrument to the reference method (Figure 10). It should be noted that the TEOM Ambient Particulate Monitor has received the EPA Method Designation IP-10B for continuous indoor particulate monitoring.
CONCLUSIONS
- The TEOM system represents a unique filter-based instrument
- The treatment of mass calibration through a single calibration con-
- The combination of the TEOM mass detector with a suitable inlet
- Comparison s of daily outdoor ambient tests between the TEOM
- The TEOM instrument can be effectively utilized in real-time
This phenomenon is due to the fact that although the van was outside the tunnel, it turned under a highway bridge to drive through the tunnels again. The second peak occurred outside normal working hours, when a cleaning crew was carrying out its work in the building.
23RD ANNUAL REPORT OF THE CLEAN AIR SOCIETY OF
AUDITOR'S REPORT TO THE MEMBERS
THE CLEAN AIR SOCIETY OF AUS- TRALIA AND MEW ZEALAND
NOTES TO AND FORMIMG PART OF THE ACCOUNTS FOR THE YEAR
Summary of Significant Account Policies
Consolidated Balance Sheet of the Clean Air Society of Australia and New Zealand as at 31 December 1989.
PROPOSED INCORPORATION OF THE CLEAN AIR SOCIETY
- PRELIMINARY Arrangement
- OBJECTS
- MEMBERSHIP Grades of Membership
- ORGANISATION
- COUNCIL Council Membership
- BRANCHES Establishment of Branches
- DIVISIONS Establishment of Divisions
- SPECIAL PURPOSE COMMITTEES Establishment of Special Purpose Committees
- MEETINGS Annual General Meetings
- VOTING AT MEETINGS 10.1 Each financial member of the Society
- FINANCIAL Funds — Source
- PROPERTY Property Vests in Council
- ALTERATION OF THE CONSTITUTION
- GENERAL Insurance
Any company or organization that believes that membership of the organization will link it closely to the purpose of the association. The department secretary or the association's secretary can refer the application to other members of the association. The council's executive sub-committee to handle the day-to-day affairs of the association between consecutive council meetings.
The members of the executive subcommittee shall be indemnified by the council for any decision or action taken in good faith in the performance of their duties as specified in this paragraph. A document or proceeding requiring authentication by the Council may be authenticated by the signature of the Chairman, Secretary or Treasurer. Those elected take office from the first day of April after the department's ordinary general meeting until the thirty-first day of March of the following year.
In the absence of the chairman, the meeting elects a chairman from among its members. Annual General Meetings of the Branch to each member of the Branch not less than 14 days before the date of the meeting, stating the date, time and location of the meeting and the business to be transacted. In the absence of the chairman, the meeting elects a chairman from those present.
In the absence of the Chairman, the meeting elects a Chairman from among those present. A proxy must be a member of the Society, but such a proxy may not hold any office of the Society held by its principal. The proxy can be "The Chairman of the Meeting" and any proxy can be told how to vote.
For the convenience of the Journal account, the Journal Circulation Manager shall be added to the list of officers of whom any two may be signatories for the operation of the account. These rules or by-laws may be made by decision of the relevant committee, but must be ratified by the Council.
