Background Autism spectrum disorder (ASD) is a complex neurodevelopmental condition, and multiple theories have emerged concerning core social deficits. While the social motivation hypothesis proposes that deficits in the social reward system cause individuals with ASD to engage less in social interaction, the overly intense world hypothesis (sensory over-responsivity) proposes that individuals...

In this paper, we present a high accuracy laser range finder and velocimeter using ultra-fast time-to-digital converter (TDC). The system operation is based on the measuring the round-trip time of a narrow laser pulse. A low-dark current high-speed PIN photodiode is used to detect the triggered laser beam and to produce start signal. The pulsed laser diode generates 45W optical power at 30ns du...

This study presents a blue light detector for evaluating the output light of phosphor based white LED package. It is composed of a silicon stripe-shaped photodiode designed and implemented in a 2 μm BiCMOS process which can be used for wafer level integration of different passive and active devices all in just 5 lithography steps. The final device shows a high selectivity to blue light. The max...

This work investigates two silicon (Si) photodiodes (PDs) fabricated in 40 nm standard CMOS technology. The basic structure of the proposed Si PD is formed by N+/P-substrate and N-well/P-substrate diodes. The N+/P-substrate PD demonstrates a responsivity of 0.09 A/W and an electrical bandwidth of 3 GHz for 8 V reverse bias at 520 nm. The N-well/P-substrate PD demonstrates a responsivity of 0.24...

GaAs/InGaAs far-infrared quantum well photodetectors based on a bound-to-continuum intersubband transition with a ~zero response! cutoff wavelength of 35 mm are reported. A peak responsivity of 0.45 A/W and detectivity of 6.0310 cmAHz/W at a wavelength of 31 mm and a temperature of 4.2 K have been experimentally achieved. Infrared response was observed at temperatures up to 18 K. A calculated r...

We report the optoelectronic device properties of individual Au-silica hybrid nanowires prepared by microwave plasma enhanced chemical vapor deposition. Due to the surface plasmon resonance (SPR) effect the photo-responsivity peak strongly depends on the shape of the embedded gold nanostructures in the silica nanowire in which the shape can be modified by controlling the growth time of Au-silic...

A systematic study on the uncertainty in spectral responsivity of silicon photodiodes due to the calibration spectral bandwidth is presented. Two of the most common types of silicon photodiodes in the field of optical power measurements have been used in this work: one with thickness of about 100 nm of SiO2 and the other with thickness about 27 nm of SiO2. It is shown that the spectral responsi...

BACKGROUND Psychological processes in bipolar disorder are of both clinical and theoretical importance. AIMS To examine depressogenic psychological processes and reward responsivity in relation to different mood episodes (mania, depression, remission) and bipolar symptomatology. METHOD One hundred and seven individuals with bipolar disorder (34 in a manic/hypomanic or mixed affective state;...

PURPOSE This study examines the acute effects of moderate aerobic exercise on 1) hemodynamic and sympathetic activity during behavioral stress and 2) beta-adrenergic receptor responsivity in a biracial sample of 24 sedentary adults. METHODS Before and after exercise, blood pressure (BP), impedance-derived cardiovascular measures, and plasma norepinephrine (NE) and epinephrine (EPI) were asses...

A common approach to pre-launch absolute spectral flux calibration of an instrument is to break the problem into two parts [1]. In the first part, the relative spectral responsivity (RSR) is determined in the laboratory, often by tuning a quasi-monochromatic source across the bandpass of the instrument. The result from this first part is a spectrum (for each pixel and each band) normalized at s...