We study the dynamics of an ultrafast single photon pulse in a one-dimensional waveguide two-point coupled with a Jaynes-Cummings system. We find that for any single photon input the transmissivity depends periodically on the separation between the two coupling points. For a pulse containing many plane wave components it is almost impossible to suppress transmission, especially when the width o...

BACKGROUND AND OBJECTIVES Higher phosphorus levels are associated with cardiovascular disease (CVD) events and mortality. Whether vascular stiffness may be responsible is unknown. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS This study examined the cross-sectional associations of serum phosphorus with ankle brachial index (ABI), pulse pressure, and large and small artery elasticity by radial...

The effect of a non-symmetric waveform on nerve conduction block induced by high-frequency biphasic stimulation is investigated using a lumped circuit model of the unmyelinated axon based on Hodgkin-Huxley equations. The simulation results reveal that the block threshold monotonically increases with the stimulation frequency for the symmetric stimulation waveform. However, a nonmonotonic relati...

The pulse wave velocity (PWV), as an indicator of arterial distensibility, may play an important role in the stratification of patients based on the cardiovascular risk. PWV inversely correlates with arterial distensibility and relative arterial compliance. Decreased arterial distensibility alters arterial blood pressure and flow dynamics, and disturbes coronary perfusion. Systemic immune and i...

introduction inhalation sedation is used for pain and anxiety control in dentistry. hypoxia is the most important side effect which can be detected using pulse oximetry, however, there are different opinions about the use of this instrument. this study has been designed to investigate this subject. methods and materials in this study, 32 adult patients from periodontal surgical department were ...

Cardiovascular disease (CVD) is currently the biggest single cause of mortality in the world; hence, the early detection of its onset is vital for effective prevention therapies. Arterial Stiffness (AS) has proved to be a direct indicator for CVD. In this study, a non-invasivemethod for assessing AS using Finger Photoplethysmographic (PPG) Signal is proposed. Virtual Instrumentation(VI) softwar...

This study identifies a novel relationship between cerebrospinal fluid (CSF) stroke volume through the cerebral aqueduct and the characteristic peaks of the intracranial pulse (ICP) waveform. ICP waveform analysis has become much more advanced in recent years; however, clinical practice remains restricted to mean ICP, mainly due to the lack of physiological understanding of the ICP waveform. Th...

BACKGROUND Pulse waveform analysis (PWA) for determination of augmentation index (AIx), a measure of arterial wave reflections, has been used to assess endothelial function, but only in combination with provocative pharmacologic testing. We hypothesized that AIx under basal conditions would be related to endothelial function as well. METHODS We quantified arterial wave reflections as aortic A...

The analysis of data derived by full-waveform laser scanning systems is of great interest. In this study, we estimate the impulse response of a laser scanning system capturing the waveform. Considering the impulse response of the system is important for precise waveform analysis. The characteristic of the system has to be mentioned to interpret the pulse properties in an accurate way. We determ...

Laser range data analysis is of high interest in photogrammetry. Range estimation for complex surface structures can be inaccurate. To overcome this drawback a method using a laser scanner capable of full-waveform analysis is proposed. For analysis the transmitted waveform of the emitted pulse is used to estimate the received waveform of the backscattered pulse for a known surface. We simulated...