Cross-section finance studies virtually never test variables for unit roots, though econometric validity depends on testing. This paper develops a cross-section unit-root test and uses it on annual data for the return on equity and the return on invested capital, ROE and ROIC, key variables in the Edwards-BellOhlson (EBO) accounting and Free Cash Flow (FCF) finance valuation models. Conventiona...

This study presents a flexible wireless electronic skin (e-skin) sensor system that includes a multi-functional sensor device, a triple-mode reconfigurable readout integrated circuit (ROIC), and a mobile monitoring interface. The e-skin device's multi-functionality is achieved by an interlocked micro-dome array structure that uses a polyvinylidene fluoride and reduced graphene oxide (PVDF/RGO) ...

This paper presents and discusses digital pixel readout integrated circuit architectures for long wavelength infrared (LWIR) in CMOS technology. Presented architectures are designed for scanning and staring arrays type detectors respectively. For scanning arrays, digital time delay integration (TDI) is implemented on 8 pixels with sampling rate up to 3 using CMOS 180nm technology. Input referre...

This study proposes a chemoresistive gas sensor readout integrated circuit (ROIC) with simple and effective scheme for tracking canceling the offset value. Before reading out sensor, proposed ROIC dynamically updates of analog-to-digital (A/D) reference range suitable to offset, enabling accurate A/D conversion within sensor’s dynamic (DR). Therefore, this approach eliminates need additional co...

The high level of accumulated expertise by ULIS and CEA/LETI on uncooled microbolometers made from amorphous silicon layer enables ULIS to develop 384 x 288 (1⁄4 VGA) IRFPA formats with 25 μm pixel-pitch designed for high end applications. This detector ROIC design relies on the same architecture as the full TV format ROIC one (detector configuration by serial link, user defined amplifier gain,...

This paper describes how entrepreneurial firms can use superior architectural knowledge to open up a technical system to gain strategic advantage. The strategy involves, first, identifying “bottlenecks” in the existing system, and then creating a new open architecture that isolates the bottlenecks in modules and allows others to connect to the system at key interfaces. An entrepreneurial firm w...

In photon counting imaging applications a focal plane array consisting of a detector and readout integrated circuit (ROIC) array must both be low noise. At room temperature, InGaAs PIN detector arrays are most suitable because the required signal bandwidth is fairly modest and the first stage input amplifiers on the ROIC can be very low noise. However, in many applications relatively long integ...

We have implemented a tin-oxide-decorated carbon nanotube (CNT) network gas sensor system on a single die. We have also demonstrated the deposition of metallic tin on the CNT network, its subsequent oxidation in air, and the improvement of the lifetime of the sensors. The fabricated array of CNT sensors contains 128 sensor cells for added redundancy and increased accuracy. The read-out integrat...

BACKGROUND AND PURPOSE Gray-scale harmonic imaging is the first method to visualize blood perfusion and capillary blood flow with ultrasound after intravenous contrast agent application. The purpose of the present study was to evaluate the potential of transient response second harmonic imaging (TRsHI) to assess normal echo contrast characteristics in different brain areas by transcranial ultra...

Semiconductor hybrid pixel detectors often consist of a pixellated sensor layer bump bonded to a matching pixelated readout integrated circuit (ROIC). The sensor can range from high resistivity Si to III-V materials, whereas a Si CMOS process is typically used to manufacture the ROIC. Independent, device physics and electronic design automation (EDA) tools are used to determine sensor character...