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Arash Hajjam

 

Arash Hajjam

Email: Arash.Hajjam@du.edu

My Portfolio Web

 

     Arash Hajjam was born in Tehran, Iran. He moved to England when he was 10 years old and studied the majority of his high school in Salford, Manchester. He received his B.S. degree in Electrical Engineering from University of Tehran, Iran in 2005 and his M.S. degree in Bio-Electrical Engineering from Iran University of Science and Technology in 2008. He is working towards his Ph.D. in the field of Micro Electro Mechanical Systems at University of Denver under the supervision of Dr Siavash Pourkamali. Arash is a 2009 recipient of the best teaching assistant award at University of Denver, school of Engineering and computer science and also the best student paper award at the ISCEE 2004 Electrical Engineering conference.

      Arash is also a licensed PE in the state of colorado.

PUBLICATIONS

Reviewed Conference Papers

22. A.Hajjam, A. Rahafrooz, J. Gonzales, R. Abdolvand and S. Pourkamali, “Localized thermal oxidation for frequency trimming and temperature compensation of micromechanical resonators,” in press, IEEE International Conference on Micro Electro Mechanical Systems (MEMS), Paris, France, Jan. 2012.
21.
A. Hajjam, A. Logan, and S. Pourkamali, “
Characterization of MEMS resonators for detection of organic gases,Proceedings of IEEE Sensors Conference, Ireland, Nov. 2011.
20.
A. Hajjam, A. Logan, J. Pandiyan, and S. Pourkamali, “High frequency thermal-piezoresistive MEMS resonators for detection of organic gases,” Proceedings of IEEE International frequency Control Symposium (IFCS 2011), San Francisco, May 2011.
19.
A. Hajjam, A. Rahafrooz, and S. Pourkamali, “Temperature compensated single-device electromechanical oscillators,” Proceedings of IEEE International Conference on Micro Electro Mechanical Systems (MEMS), Cancun, Mexico, Jan. 2011.
18.
A. Hajjam, J. Wilson, A. Rahafrooz, and S. Pourkamali, “Self-sustained micromechanical resonant particulate microbalance/counters,” Proceedings of IEEE International Conference on Micro Electro Mechanical Systems (MEMS), Cancun, Mexico, Jan. 2011.
 
17.
A.Hajjam, A.Rahafrooz, and S. Pourkamali, “Sub-100ppb/ºC temperature stability in thermally actuated high frequency silicon resonators via degenerate phosphorous doping and bias current optimization,” Proceedings of IEEE International Electron Device Meeting (IEDM), San Francisco, California, Dec. 2010.
16.
A.Hajjam, J. Pandiyan, A. Rahafrooz, and S. Pourkamali, “MEMS resonant sensors for detection of gasoline vapor,” Proceedings of  IEEE Sensors Conference, Hawaii, Nov. 2010.
 
15.
A. Hajjam, J. Wilson, A. Rahafrooz, and S. Pourkamali, “Detection and mass measurement of individual air-borne particles using high frequency micromechanical resonators,” Proceedings of IEEE Sensors Conference, Waikoloa, Hawaii, Nov. 2010.
 
14.
A. Hajjam, J.C. Wilson, A. Rahafrooz, and S.Pourkamali, “Fabrication and characterization of resonant aerosol particle mass sensors,” Proceedings of IEEE International Conference on Micro Electro Mechanical Systems (MEMS), Hong Kong, Jan. 2010.
 
13. A.Rahafrooz, A.Hajjam, B.Tousifar, and S.Pourkamali, “Thermal actuation, a suitable mechanism for high frequency electromechanical resonators,” Proceedings of IEEE International Conference on Micro Electro Mechanical Systems (MEMS), Hong Kong, Jan. 2010.
12.
B.Harrington, A. Hajjam, J.C. Wilson, S.Pourkamali, R.Abdolvand “Thin-film piezoelectric-on-silicon particle mass sensors,” Proceedings of IEEE International Frequency Control Symposium (IFCS), New Port Beach, California, Jun. 2010.

11.
H.Behnam, A.Hajjam and H.Rakhshan, “Modeling twinkling artifact in sonography,” Proceedings of IEEE International Conference on Bioinformatics and Biomedical Engineering (ICBBE), Chengdu, China, Jun. 2010.
 
10.
A. Hajjam, A. Rahafrooz, J.C. Wilson, and S.Pourkamali, “Thermally actuated MEMS resonant sensors for mass measurement of micro/nanoscale aerosol particles,” Proceedings of IEEE Sensors, Christchurch, New Zealand, Oct. 2009.
9.
A. Hajjam, A. Rahafrooz, and S.Pourkamali, “Thermally actuated low impedance MEMS resonators for mass sensing applications,” Proceedings of IEEE International Conference of Electron Devices and Solid- State Circuits (EDSSC), Xian, China, Jan. 2009.

8.
A. Rahafrooz, A. Hajjam, and S. Pourkamali, “Thermal actuation of high frequency micromechanical resonators,” Proceedings of IEEE SOI, San Francisco, California, Oct 2009.
 
7.
A. Rahafrooz, A. Hajjam, and S. Pourkamali, “Thermally actuated high frequency dimple MEMS resonators,” Proceedings of IEEE Signals and systems, Tunisia, Oct. 2009.
 
6. A.Hajjam, M.Hazrati and A.Ashoori “A new method for boundary determination in intra vascular ultrasound images,” Proceedings of IEEE International Conference on Signal Processing, Communications and Networking (ICSCN), Madras, India, Jan. 2008.
5. M.Hazrati and A.Hajjam “Constructing the median frames in a heart cycle video using the iterative method,” Proceedings of International symposium on biomedical engineering (ISBME), Bangkok, Thailand, Nov. 2008.

4.
A.Honarbakhsh , A.Hajjam, H.Behnam, H.Rakhshan, H.Khatami, “Twinkling artifact on color doppler sonography and dependence on radiation force of the vibro-acoustography,”  Iranian conference on radiology (ICR) conference , Shiraz, Iran, Jan. 2008.

3. A.Hajjam, H.Behnam and M.Hazrati “Comparison of a proposed time domain model with the cosine modeling of blood flow ultrasound signal in a cardiac cycle,” Proceedings of British medical ultrasound meeting (BMUS), Harrington, England, Dec. 2007.  
2. M.Rabbani and A. Hajjam “Analysis of state equations through N-Poles,” Proceedings of Iranian student conference on electrical engineering (ISCEE), Tehran, Iran, July 2004.  
1. A. Fereidoonian and A. Hajjam, “Distribution engineers approach and awareness to power quality and its mathematical representation,” Proceedings of Iranian student conference on electrical engineering (ISCEE), Tehran, Iran, July 2004.


Reviewed Journal Papers

5. A Hajjam, A. Logan, and S. Pourkamali, “Doping induced temperature compensation of thermally actuated high frequency silicon micromechanical resonators,” accepted for publication in IEEE MEMS Journal subject to minor revisions.
4. A Hajjam, J. C. Wilson, and S. Pourkamali, “Individual air-borne particle mass measurement using high frequency micromechanical resonators,” in IEEE Sensors Journal, vol. 11, no. 11, pp. 2883-2890, Nov. 2011.
3.
A Hajjam, J. C. Wilson, A. Rahafrooz, and S. Pourkamali, “Fabrication and characterization of thermally actuated micromechanical resonators for airborne particle mass sensing, part II: device fabrication and characterization,” J. of Micromechanics and Microengineering (JMM), vol. 20, no. 12, pp. 1-10, Dec. 2010.
 
2.
A.Hajjam and H.Behnam “A modified time domain approach for the modeling of blood flow Ultrasound Signal,” J. Ultrasound, vol. 16, pp. 160-164, August 2008.

1. A.Hajjam, H.Behnam and M.Hazrati “Time and cosine simulation modeling of blood flow ultrasound signal in a heart cycle,” J. Ultrasound (ISSN: 1742-271X), vol. 15, pp. 251-256, November 2007.


Book Publications

1. S. Zokaei, A.Hajjam, M.Majzoobi “MATLAB for Engineers” Published in Persian by KNT university of Technology, ISBN 964-8703-07-8, spring 2005.

Pending Patent / Invention Disclosures

1. S. Pourkamali, and A. Hajjam, “Temperature Compensated High-Frequency Thermally Actuated Micro/Nanomechanical Resonators,” Filed September 2010.