Liu, Mike, Sabet, Leyla, Schnetzer, Astrid, Stauffer, Beth, Caron, David, Ho, Chih-Ming, ...
This is a project that aims to expedite research in marine biology using chip-based and state-of-the-art detection technology. The project is a joint effort that will incorporate the expertise of...
New Wireless Miniature Sensor Technologies for CENS (2009)
Aswin, Buddy, Butler, Christopher, Caron, David, Harmon, Thomas, Ho, Chih-Ming, Judy, Jack, ...
Although many sensors (e.g., temperature, light level, acceleration, etc.) that are compatible with sensor networks (i.e., sensitive, small, low power, etc.) are now commercially available, two...
Department of Mechanical Engineering, (2009)
Motoaki Kimura, Masahiro Takei, Chih-ming Ho, Yoshifuru Saito, Kiyoshi Horii
University of California,
Out-of-Plane Magnetic Actuators with Electroplated Permalloy for Fluid Dynamics Control (2008)
Chang Liu, Thomas Tsao, Gwo-bin Lee, Yong W. Yi, Yu-chong Tai, ...
We have developed millimeter-scaled magnetic actuators capable of achieving large out-of-plane displacement and large forces using surface micromachining techniques in conjunction with electroplating...
FLEXIBLE SHEAR STRESS SENSOR SKIN FOR AERODYNAMICS APPLICATIONS (2008)
Fukang Jiang, Yong Xu, Tianxiang Weng, Zhigang Han, Yu-chong Tai, Adam Huang, ...
Packaging for a large distributed sensing system is a challenging topic. Using flexible skin technology solves many of these problems. Combining with the newly developed backside contact technique,...
Wei, Fang, Wang, Jianghua, Liao, Wei, Zimmermann, Bernhard G., Wong, David T., Ho, Chih-Ming
We developed a technique for electrochemical detection of salivary mRNA employing a hairpin probe (HP). Steric hindrance (SH) suppresses unspecific signal and generates a signal-on amplification...
Prediction of the Pressure Drop Through Micromachined Particle Filters (2007)
Joon Mo Yang, Xing Yang, Chih-ming Ho, Yu-chong Tai
Micro-filters are fabricated using MEMS technology, and both measurements and numerical calculations are carried out in order to estimate the power requirement in a micron-size particle collection...
A Fully Integrated Shear Stress Sensor (2007)
Xuan-qi Wang, Zhigang Han, Fukang Jiang, Thomas Tsao, Qiao Lin, ...
A fully integrated shear-stress sensor has been developed using a post-IC process that is added onto 4 foundry-processed CMOS wafers. The shear-stress sensor uses a gate-polysilicon hot-wire as the...
Leading-edge Vortices Control on a Delta Wing by Micromachined Sensors and Actuators (2007)
Gwo-bin Lee, Yu-chong Tai, Fukang Jiang, Charles Grosjean, Chang Liu, Chih-Ming Ho
Instead of using conventional flaps to generate torques, we explore the feasibility of applying micromachined sensors and actuators to control leading-edge vortices, and consequently, provide...
Experimental study and nonlinear dynamic analysis of time-periodic micro chaotic mixers (2007)
Lee, Yi-Kuen, Shih, Chiang, Tabeling, Patrick, Ho, Chih-Ming
The efficiency of MEMS-based time-periodic micro chaotic mixers was experimentally and theoretically investigated in this study. A time-periodic flow perturbation was realized using digitally...
Surface Plasmon Band Gap Sensor A new sensor for robust on-field biosensing (SEN 1) (2006)
Arnaud Benahmed, Robert Lam, Chih-Ming Ho
The experimental demonstration of a new sensor based on the properties of surface plasmon propagation through nanostructures is presented. This sensor is a sensitive and versatile device, since it is...
SEN 0: Wireless Miniature Sensors for CENS Overview (2006)
Arnaud Benahmed, Nikolaus Rechner, Robert Lam, Michael Bendikov, Alexander Ratko, Yair Wisjboom, ...
A parametrized three-dimensional model for MEMS thermal shear-stress sensors (2005)
Lin, Qiao, Xu, Yong, Jiang, Fukang, Tai, Yu-Chong, Ho, Chih-Ming
This paper presents an accurate and efficient model of MEMS thermal shear-stress sensors featuring a thin-film hotwire on a vacuum-isolated dielectric diaphragm. We consider three-dimensional (3-D)...
SEN0: CENS Sensor Research: Overview (2005)
Thomas Harmon, Chih-Ming Ho, Jack W. Judy, Yu-Chong Tai; Ira Goldberg, Tatyan Bendikov, Dohyun Kim, ...
SEN4: Surface Plasmon Band Gap Sensor for robust, label-free, on-field biological detection (2005)
Arnaud Benahmed, Branden Brough, Chih-Ming Ho
Networked censors require miniaturized censors for realistic large scale deployment. We are developing an entire new versatile molecular sensor based on the plasmonic band gap phenomenon. It uses...
Lin, Qiao, Jiang, Fukang, Wang, Xuan-Qi, Xu, Yong, Han, Zhigang, Tai, Yu-Chong, ...
MEMS thermal shear-stress sensors exploit heat-transfer effects to measure the shear stress exerted by an air flow on its solid boundary, and have promising applications in aerodynamic control....
IC-integrated flexible shear-stress sensor skin (2003)
Xu, Yong, Tai, Yu-Chong, Huang, Adam, Ho, Chih-Ming
This paper reports the successful development of the first IC-integrated flexible MEMS shear-stress sensor skin. The sensor skin is 1 cm wide, 2 cm long, and 70 /spl mu/m thick. It contains 16...
On-Chip Chromatography-Based Chemical Sensing (2003)
Qing He, Changlin Pang, Yu-Chong Tai, Weixing Lu, Chih-Ming Ho
We are developing a highly sensitive and selective on-chip chromatography-based chemical sensing system, which has the capability to detect most common ions, such as nitrite, nitrate, fluoride,...
On the Feedback Phenomenon of an Impinging Jet. (2002)
Nosseir ,Nagy Sabet M., Ho,Chih-Ming
The resonance phenomenon which occurs when a high speed turbulent jet impinges on a large flat plate is experimentally studied. The far field noise is also investigated for a wide range of impinging...
On the Manipulation of Spreading Rates of Forced Mixing Layers. (2002)
The vortex merging in a mixing layer can be modified by applying periodic forcing at the origin. When the forcing parameters (frequency, amplitude as well as phase difference between fundamental and...
Control of Asymmetric Jet (2002)
A passive method of enhancing the rate of entrainment by as much as 500% in subsonic open nozzle flows has been obtained by modifying axisymmetric nozzle geometry to a 2:1 aspect-ratio elliptic...
Ho,Chih-Ming, Blackwelder,Ron F., Kaplan,Richard E.
An elliptic nozzle was found effective for entrainment in jets. It was found that the onset of the fine scale turbulence alters the characteristics of the vortex merging. These studies encompassed...
Huang, Tony Jun, Liu, Minghsun, Knight, Linda D., Grody, Wayne W., Miller, Jeff F., Ho, Chih-Ming
Single nucleotide polymorphisms are implicated as having a significant role in regulating growth, development and, thereby, human health and disease. We have developed a method for identifying single...
High Shear Stress Detection with Micro Imaging Chip and Discrete Wavelets Transform (2000)
Mitoaki Kimura, Masahiro Takei, Norimasa Miyagi, Chih-Ming Ho, Yoshifuru Saito, Kiyoshi Horii
A micromachined flow shear-stress sensor based on thermal transfer principles (1999)
Liu, Chang, Huang, Jin-Biao, Zhu, Zhenjun (Alex), Jiang, Fukang, Tung, Steve, Tai, Yu-Chong, ...
Microhot-film shear-stress sensors have been developed by using surface micromachining techniques. The sensor consists of a suspended silicon-nitride diaphragm located on top of a vacuum-sealed...
A Micromachined Flow Shear Stress Sensor based on Thermal Transfer Principles (1999)
Chang Liu, Alex Z. Zhu, Fukang Jiang, Steve Tung, Yu-chong Tai, ...
Micro hot-#lm shear-stress sensors have been developed by using surface micromachining techniques. The sensor consists of a suspended silicon-nitride diaphragm located on top of a vacuum-sealed...
The Transition and Dynamics of Bounded and Free Shear Layers. (1998)
Laufer,John, Kaplan,Richard, Ho,Chih-Ming
Research activities in transitional and turbulent boundary layers and free shear flows are described. Experimental efforts which focused on an understanding of turbulent 'spots' in a developing...
Studies of Unsteadiness in Boundary Layers. (1998)
Blackwelder, Ron, Kaplan, R. E., Ho, Chih-Ming, Huerre, Patrick, Redekopp, Larry G.
Experimental and theoretical efforts aimed at clarifying and revealing important dynamical features of several turbulent shear flows are described. The flows studied include boundary layers, jets,...
Unsteady Water Channel. (1998)
When an airplane undergoes maneuvering, the motion includes many modes: pitching, plunging, translation, acceleration and deceleration. The aerodynamics of the first three types of motion are...
Studies of Unsteadiness in Boundary Layers. (1998)
Blackwelder, Ron F., Ho, Chih-Ming, Huerre, Patrick, Redekopp, Larry G.
Experimental and theoretical efforts aimed at clarifying and revealing important dynamical features of several turbulent shear flows are described. The flows studied include boundary layers, jets,...
Control of Unsteady Aerodynamic Forces. (1998)
The aerodynamic properties of an airfoil under unsteady conditions are very different from ones in steady conditions because the vortex generated by unsteady separation greatly modifies the loading...
Unsteady Behavior of Turbulent Shear Flows. (1998)
Ho, Chih-Ming, Huerre, P., Redekopp, L. G.
Theoretical studies on the temporal and spatial structure in blunt body wakes have revealed the necessary conditions under which global, self-sustained oscillations appear and have provided firm...
Search for Chaos in Free Shear Flows. (1998)
Ho, Chih-Ming, Huerre, Patrick, Redekopp, Larry G.
Theoretical studies on the temporal and spatial structure in blunt-body wakes have revealed the necessary conditions under which global, self-sustained oscillations appear and have provided firm...
Study of Fluid Dynamics with Integrated Micro Sensors. (1998)
The drastic size reduction in the micromachine field results in the breakdown of the scaling laws used in traditional engineering fields because the large length scale change is significant enough...
Micro Heat Exchanger Using Impinging Jets and Vacuum-Insulated Skin (1998)
The goal of this work was to study micro impinging jet cooling, focusing on experimentation with variable parameters of height, nozzle diameter, and nozzle spacing in the submillimeter range. The...
Developing Innovative Mesoscale Actuator Devices for Use in Rotorcraft Systems (1998)
Carman, Greg P., Dunn, Bruce, Friedman, Peretz, Hahn, Tom, Ho, Chih-Ming
The primary goal of this MURI was to develop a superior mesoscale piezoelectric actuator device when compared to conventional smart actuation systems. The secondary goal was to evaluate the potential...
Self-Activated Micro Direct-Methanol Fuel Cell (muDMFC) at Near Room Temperature (1998)
Zhong, Xiaolin, Ho, Chih-Ming, Kim, Chang-Jin, Zhang, Xiang, Wang, Chao-Yang
This research project was focused on the development and testing of Micro Direct-Methanol Fuel Cells (Micro DMFC). A Si-based Micro DMFC was developed and its electrochemical characteristics studied....
Micro-Electro-Mechanical-Systems (MEMS) and Fluid Flows (1998)
The micromachining technology that emerged in the late 1980s can provide micron-sized sensors and actuators. These micro transducers are able to be integrated with signal conditioning and processing...
Control of Interactions between Wake and Blades. (1997)
This investigation of rotor-stator interaction noise originated from an interest in reducing a ventilation-noise problem. This type of noise is generated aerodynamically by the flow interaction...
Control of Mixing by MEMS Based Distributed Fuel Injectors (1997)
In this paper, we propose to use micro injectors to control mixing of flow for combustion enhancement. The principle and development of the micro injectors are described. Ejection of droplets (8...
Manipulation of Airfoil Response in an Unsteady Stream. (1997)
Experiments were conducted to investigate the mechanism responsible for vortex breakdown over delta - wing. By varying the free stream velocity, unsteady vortex breakdown occurs over the wing due to...
Improved micro thermal shear-stress sensor (1996)
Huang, Jin-Biao, Tung, Steve, Ho, Chih-Ming, Liu, Chang, Tai, Yu-Chong
Micro hot-film shear-stress sensors have been designed and fabricated by surface micromachining technology which is compatible with IC technology. A polysilicon strip, 2 μm×80 μm, is deposited on...
Huang, Tony Jun, Liu, Minghsun, Knight, Linda D., Grody, Wayne W., Miller, Jeff F., Ho, Chih-Ming
Single nucleotide polymorphisms are implicated as having a significant role in regulating growth, development and, thereby, human health and disease. We have developed a method for identifying single...
Evaluation of synthetic linear motor-molecule actuation energetics
Brough, Branden, Northrop, Brian H., Schmidt, Jacob J., Tseng, Hsian-Rong, Houk, Kendall N., Stoddart, J. Fraser, ...
By applying atomic force microscope (AFM)-based force spectroscopy together with computational modeling in the form of molecular force-field simulations, we have determined quantitatively the...
Huang, Tony Jun, Liu, Minghsun, Knight, Linda D., Grody, Wayne W., Miller, Jeff F., Ho, Chih-Ming
Single nucleotide polymorphisms are implicated as having a significant role in regulating growth, development and, thereby, human health and disease. We have developed a method for identifying single...
Evaluation of synthetic linear motor-molecule actuation energetics
Brough, Branden, Northrop, Brian H., Schmidt, Jacob J., Tseng, Hsian-Rong, Houk, Kendall N., Stoddart, J. Fraser, ...
By applying atomic force microscope (AFM)-based force spectroscopy together with computational modeling in the form of molecular force-field simulations, we have determined quantitatively the...
Wei, Fang, Wang, Jianghua, Liao, Wei, Zimmermann, Bernhard G., Wong, David T., Ho, Chih-Ming
We developed a technique for electrochemical detection of salivary mRNA employing a hairpin probe (HP). Steric hindrance (SH) suppresses unspecific signal and generates a signal-on amplification...
Wong, Pak Kin, Yu, Fuqu, Shahangian, Arash, Cheng, Genhong, Sun, Ren, Ho, Chih-Ming
A mixture of drugs is often more effective than using a single effector. However, it is extremely challenging to identify potent drug combinations by trial and error because of the large number of...
Molecular effects on boundary condition in micro∕nanoliquid flows
Ulmanella, Umberto, Ho, Chih-Ming
We experimentally investigated molecular effects of the slip∕no-slip boundary condition of Newtonian liquids in micro- and nanochannels as small as 350 nm. The slip was measurable for channels...