This paper focuses on a new type of control laws for oriented mechanical systems. The starting point is dual quaternion and its properties. Logarithm of dual quaternion is defined, based on which control laws are developed, tackling both regulation and tracking problems using logarithmic feedback. The control laws are shown to have several merits, including global asymptotically convergence, co...

Physical disturbance of plants or plant parts results in a mechanical stress response from the plant. Mechanical stress applied naturally or under controlled conditions inhibits growth in mass and dimensions of major plant parts. Wind and precipitation are important natural sources of mechanical stress. Under field conditions, cultivated plants experience these natural mechanical stresses plus ...

A DNA microarray with 12,000 features was integrated with a microfluidic cartridge to automate the fluidic handling steps required to carry out a gene expression study of the human leukemia cell line (K562). The fully integrated microfluidic device consists of microfluidic pumps/mixers, fluid channels, reagent chambers, and a DNA microarray silicon chip. Microarray hybridization and subsequent ...

BACKGROUND AND OBJECTIVES Mechanical bowel preparation (MBP) has been used prior to total laparoscopic hysterectomy (TLH), but evidence for its use is lacking. Our study seeks to assess whether or not completion of preoperative MBP prior to TLH improves visualization of the surgical field, bowel handling, or overall ease of the operation. METHODS Women aged 18-65 years undergoing TLH for beni...

the effects of dietary nucleotide (nt) were evaluated on some serum biochemical parameters and acute stress responses of the catfish (pangasianodon hypophthalmus). five experimental diets including 0, 0.25, 0.5, 0.75, and 1% nt were supplied to catfish fry for 10 weeks. at the end of the experiment, fish fed the control and 1% nt diets were subjected to handling and crowding stress. the results...

chemotherapy medication errors may lead to potentially harmful consequences while most of them could be preventable. this study aims to determine the incidence and type of drug handling and administration errors among the nurses and to identify possible contributing factors. setting of the study was a teaching hospital affiliated to shahid beheshti university of medical sciences, tehran, iran. ...

Abstract Handling robots are widely used today, and non-fixed handling is more effective than fixed in some specific scenarios. The of can increase the load reduce precise positioning process grabbing object, but velocity relatively slow for stability object. In addition, it needs to consider friction reaction force constraints on This paper proposes a high-velocity method robot. First, deduces...

Electrical pacing/stimulations (EP) have been widely adopted to promote the maturation of hiPSC-derived cardiomyocytes. However, there is a debate about their functions and effectiveness due non-optimized pacing conditions. Here, EP (13 V cm−1, 2 ms in width, 5 Hz frequency) on cardiac tissue beating mechanics are analyzed using digital image correlation (DIC). The tissues with without at cultu...

Objective: to present an update on the types of phlebitis, namely: chemical mechanical bacterial or infectious phlebitis and post-infusional aspects related concept, characteristics, clinical manifestations their impact nursing practice. Method: article chemical, mechanical, post-infusion phlebitis. Results: results from administration drugs that damage endothelium vessels; a is incorrect handl...

Acute ischemia results in deadly cardiac arrhythmias that are a major contributor to sudden cardiac death (SCD). The electrophysiological changes involved have been extensively studied, yet the mechanisms of ventricular arrhythmias during acute ischemia remain unclear. What is known is that during acute ischemia both focal (ectopic excitation) and nonfocal (reentry) arrhythmias occur, due to an...