In this study, an ultrasonic technique was employed to obtain pressure-volume-temperature (PVT) relationship of polymer melt by measuring ultrasonic velocities under various temperatures and pressures. The proposed technique was applied to on-line monitoring of injection molding process as an attempt to predict quality of molded parts. From the comparison based on Tait equation, it was confirme...

The SAFT-VRX equation of state combines the SAFT-VR equation with a crossover function that smoothly transforms the classical equation into a nonanalytical form close to the critical point. By a combinination of the accuracy of the SAFT-VR approach away from the critical region with the asymptotic scaling behavior seen at the critical point of real fluids, the SAFT-VRX equation can accurately d...

This study set out to investigate the behavioral correlates of changes in resting-state functional connectivity before and after performing a 20 minute continuous psychomotor vigilance task (PVT) for patients with chronic post-concussion syndrome. Ten patients in chronic phase after mild traumatic brain injury (mTBI) with persisting symptoms of fatigue and ten matched healthy controls participa...

Process virtualization is receiving increasing attention as an emerging phenomenon in information systems. Process Virtualization Theory (PVT) has been suggested as one way for understanding factors that affect the behavior of process participants when they face a virtual process. In this paper, we empirically analyze and test the propositions of PVT. We investigate the “airport check-in” proce...

AIM To evaluate the value of D-dimer and P-selectin in cirrhotic portal hypertension (PHT) patients for prediction of portal vein thrombosis (PVT) after devascularization. MATERIAL AND METHODS 137 patients with cirrhotic PHT who undergone devascularization from January 2012 to April 2014 were retrospectively reviewed, all of them were divided into two groups (PVT group and non-PVT group) by D...

OBJECTIVE Psychomotor vigilance testing (PVT) rapidly assesses attention, reaction time (RT), and abnormal vigilance. Thus, PVT may be an adjunct to screening drivers for high-risk obstructive sleep apnea (OSA)/excess daytime sleepiness (EDS). METHODS Commercial drivers and emergency responders undergoing occupational examinations took a 10-minute PVT and were instructed to achieve their fast...

Portal vein thrombosis (PVT) has been recently documented after a variety of laparoscopic surgeries. Although it is well established in splenectomies, its prevalence in other laparoscopic procedures is rare. PVT in colectomies has been associated with inflammatory processes, such as ulcerative colitis and diverticulitis. We report a case of postoperative PVT following a total abdominal colectom...

Forty-five consecutive patients with polymorphous ventricular tachycardia (PVT) were studied. The arrhythmia proved to be of a drug-related cause in 27 and due to an electrolyte disorder in four patients. Coexistent cardiac diseases without metabolic or drug-related abnormalities included ischemic heart disease in three, cardiomyopathy in three, and mitral valve prolapse in two. PVT was exercis...

The Psychomotor Vigilance Task (PVT) is considered the gold standard fatigue detection device and is used frequently in fatigue research. With the rapid development of new technologies it is essential to develop PVT available on different platforms such as touchscreen devices. The big advantage of such PVT is that it can be implemented on small devices and can be easily used in field studies. T...

Portal vein thrombosis (PVT) is a rare form of venous thrombosis that affects the hepatic portal vein flow, which can lead to portal hypertension. Treatment of PVT includes anticoagulants, thrombolysis, insertion of shunts, bypass surgery, and liver transplantation. Single anticoagulation therapy is not regarded as a curative treatment but can be associated with a reduction in new thrombotic ep...