Accidents involving rotating equipment in chemical, petrochemical, petroleum, and gas plants can result in damage to other process equipment and catalysts along with lost production. Conversely, process upsets, process instrumentation failure, or failures of other process equipment can result in damage to rotating equipment. An effective rotating equipment loss prevention program will be an int...

Chemical process operation optimization aims at obtaining the optimal operating set-points by real-time solution of an problem that embeds a steady-state model process. This task is challenged unavoidable Uncertain Parameters (UPs) variations. MultiParametric Programming (MPP) approach for solving this challenge, where must be updated online, reacting to sudden changes in UPs. MPP provides alge...

Microelectronic devices employ electrons for signaling whereas the nervous system signals using ions and chemicals. Bridging these signaling differences would benefit applications that range from biosensing to neuroprosthetics. Here, we report the use of localized electrical signals to perform an operation common to chemical signaling in the nervous system. Specifically, we employ electrical si...

1. Extended Abstract Process systems engineering (PSE) has been traditionally concerned with the understanding and development of systematic procedures for the design, control, and operation of chemical process systems (Sargent, 1991). Computer aided process engineering (CAPE), like PSE, has been traditionally concerned with the development and solution of problems related to chemical process d...

A noncontact chemical and electrical measurement X-ray photoelectron spectroscopy (XPS) technique is performed to investigate a CdS-based photoresistor during its operation. The main objective of the technique is to trace chemical- and location-specified surface potential variations as shifts of the XPS Cd 3d(5/2) peak position without and under photoillumination with four different lasers. The...

The tight profit margins under which the Chemical Process Industry (CPI) operates are forcing companies to pay more and more attention to the design and operation of their Supply Chains (SC). Traditional approaches available in the Process Systems Engineering (PSE) literature to address the design and operation of chemical SC focus on the process operations side and neglect the financial part o...

Unilateral obstruction or injury to the vas deferens can result in significant injury to the contralateral testicle. Although various pathways have been proposed, the mechanism of contralateral testicular deterioration remains controversial. The present animal study was performed to evaluate the effects of unilateral vasectomy on ipsilateral and contralateral testicular histology and fertility ...

A critical need for enhancing usability and capabilities of microfluidic technologies is the development of standardized, scalable, and versatile control systems1,2. Electronically controlled valves and pumps typically used for dynamic flow regulation, although useful, can limit convenience, scalability, and robustness3-5. This shortcoming has motivated development of device-embedded non-electr...

Molecular motors are small, and, as a result, motor operation is dominated by high-viscous friction and large thermal fluctuations from the surrounding fluid environment. The small size has hindered, in many ways, the studies of physical mechanisms of molecular motors. For a macroscopic motor, it is possible to observe/record experimentally the internal operation details of the motor. This is n...