The industrial trend in embedded systems is than an increasing amount of control applications are implemented in distributed computer systems. Additional problems then face the designers such as significant and potentially varying end-to-end time-delays, the fact that data may be lost on the network, and that one or more nodes, or even parts of a node, may experience errors. Of course, similar ...

The passage of time can be estimated either explicitly, e.g. before leaving home in the morning, or implicitly, e.g. when catching a flying ball. In the present study, the latency of saccadic eye movements was used to evaluate differences between implicit and explicit timing. Humans were required to make a saccade between a central and a peripheral position on a computer screen. The delay betwe...

visual stimulation with precise control of stimulus has transformed the field of psychophysics since the introduction of personal computers. luminance and chromatic features of stimulus, timing, and position of the stimulus are the main features that could be defined using programs written specifically for psychophysical experiments. in this manuscript, software used for the psychophysical expe...

This paper presents an automatic approach to synthesizing schedulable timing constraints for real-time control systems. Given the performance speciications and schedulability constraints of a real-time control system, the approach derives task-level timing constraints which can guarantee these requirements. The control performance is speciied in terms of control output responses such as steady ...

nowadays herbicide reduction and different approaches leading to this goal like split application have been brought to attention. two green house experiments were carried out to investigate the efficiency of single and split application of mesosulfuron-methy+iodosulfuron methyl to control wild oat (avena ludoviciana). the influence of applications intervals and the ratios of the two application...

This paper presents a model of an electric variable valve timing (EVVT) system and its closed-loop control design with experimental validation. The studied EVVT uses a planetary gear system to control the engine cam timing. The main motivation of utilizing the EVVT system is its fast response time and the accurate timing control capability. This is critical for the combustion mode transition co...

Like the biological clock in the body, replication of each cell type (even different cells of the same organism) follows a timing program. Abnormal function of this timer could be an alarm for a disease like cancer. DNA replication starts from a specific point on the chromosome that is called the origin of replication. In contrast to prokaryotes in which DNA replication starts from a single ...

This is an overview of distributed computer control systems from the perspective of control performance and the requirements of a safety-critical application. The common timing issues, here called the timing problems, are stated from a control point of view: control period, control delay, jitter and transient error. seen as disturbances acting on the closed loop via the digital computer system,...

We present circuits and techniques which allow the extraction of fine-grained timing information using a simple, scan-based, test-access port such as the JTAG/IEEE 1149 standard. We go on to show how these techniques can be combined with other simple circuits for post-fabrication timing control. These techniques open up opportunities to perform timing oriented tests through TAP control. Further...