In this paper, we study the fluid-structure interaction (FSI) of a three-dimensional (3D) flexible membrane immersed in an unsteady separated flow at moderate Reynolds numbers. We employ body-conforming variational FSI solver based on recently developed partitioned iterative scheme for coupling turbulent fluid with nonlinear structural dynamics. Of particular interest is to understand flow-exci...

The objective of the thesis is to address the problem of clock skew between two different clock domains in modern day microprocessors due to the process, voltage and temperature (PVT) variations. In order to mitigate the misalignment of the clocks in the different clock domains, a delay line is added in all but the reference clock domain. These delay lines add or subtract the delay (as necessar...

For datacenter applications that require tight synchronization, transactions are commonly employed for achieving concurrency while preserving correctness. Unfortunately, distributed transactions are hard to scale due to the decentralized lock acquisition and coordination protocols they employ. In this paper, we show that it is possible to achieve scalability for distributed transactions by usin...

This study was conducted to investigate the effects of age and sex on the fleece characteristics of 40 Iranian indigenous Khorasan goats. Goats were divided into two different sex and age (kids and adults) groups. Fiber characteristics under study were: fleece weight, fiber length, lock length, fiber diameter, coefficient of fiber diameter, breaking load, resistance, elongation, hair percentage...

This paper introduces a new lock detector for symbol timing recovery PLLs in QPSK receivers operating in AWGN channels. The detector necessitates only two samples per symbol, and these samples correspond to those required by the popular Gardner[1] timing error detector. The lock detector is characterized theoretically and through simulations. It transpires that the lock detector is selfnormaliz...

Nonmedical use of prescription medications--particularly controlled substances--has risen dramatically in recent decades, resulting in alarming increases in overdose-related health care utilization, costs, and mortality. The Centers for Disease Control and Prevention estimate that 80% of abused and misused controlled substances originate as legal prescriptions. As such, policymakers and payers ...

In a multiprogrammed multiprocessor system, existing lock based mechanisms hold the lock for a task during a context-switch. In this case, the time that a task holds a lock can be greatly increased, resulting in a wasted lock utilization and an increase in the average response time for tasks using the lock. An option for avoiding this problem is to release the lock held by a task during a conte...

Two traditional approaches exist for a task that is blocked on a global resource; a task either performs a non-preemptive busy wait, i.e., spins, or suspends and releases the processor. Previously, we have shown that both approaches can be viewed as spinning either at the highest priority (HP) or at the lowest priority on the processor (LP), respectively. Based on this view, previously we have ...

Providing efficient access to XML documents becomes crucial in XML database systems. More and more concurrency control protocols for XML database systems were proposed in the past few years. Being an important language for addressing data in XML documents, XPath expressions are the basis of several query languages, such as XQurey and XSLT. In this paper, we propose a lock-based concurrency cont...