The conversion of historical photographs, into digital surrogates facilitates the easy access to the intellectual content. Durable high quality digital master images available today enable the creation of specific derivatives in the future. As historical photographs often are very vulnerable and the conversion process is expensive, the creation of high quality digital master images is important...

BACKGROUND Recent technical advances in digital image capture and analysis greatly improve the measurement of protein expression in tissues. Breast cancer biomarkers provide a unique opportunity to utilize digital image analysis to evaluate sources of variability that are caused by the tissue preparation, in particular the decalcification treatment associated with the analysis of bone metastati...

A proof-of-concept of the use of a fully digital radiofrequency (RF) electronics for the design of dedicated Nuclear Magnetic Resonance (NMR) systems at low-field (0.1 T) is presented. This digital electronics is based on the use of three key elements: a Direct Digital Synthesizer (DDS) for pulse generation, a Software Defined Radio (SDR) for a digital receiving of NMR signals and a Digital Sig...

approved: _____________________________________________________ Un-Ku Moon Kartikeya Mayaram Digital phase-locked loops (PLLs) have been receiving increasing attention recently due to their ease of integration, scalability and performance comparable to their analog counterparts. In digital PLLs, increased resolution in time-to-digital conversion is desirable for improved noise performance. This...

land use change may influence many natural phenomena and ecological processes, including runoff, soil erosion, sedimentation and soil conditions. decreasing of forest area in the north of iran is one of the critical problems in recent years. the aims of this study are to detect land use changes between 1967 to 2002 using satellite images of land sat 7 etm+ (2002), aerial photos and digital topo...

This paper proposes a pipeline analog-to-digital converter (ADC) with non-binary encoding technique based on β-expansion. By using multiply-by-β switched-capacitor (SC) multiplying digital-to-analog converter (MDAC) circuit, our proposed ADC is composed by radix-β (1 < β < 2) 1 bit pipeline stages instead of using the conventional radix-2 1.5 bit/1 bit pipeline stages to realize non-binary anal...

This work introduces a novel methodology that eases the synchronous to asynchronous conversion of existing digital circuits. Synchronous singlephased circuits may have its performance improved with the use of a variable rate clock generator if the conversion is done on some key circuits. This methodology is used to improve the performance of a soft-core implementation ofthe Blowfish cryptograph...

We present work toward the development of a digital to analog (DAC) conversion scheme to efficiently achieve the bit-depths required in high performance infrared scene projection. This is achieved by appropriately dividing the conversion amongst the close support electronics (CSE), the periphery of the read-in integrated-circuit (RIIC) chip, and the pixel drive circuitry.

Two-step flash architectures are an effective means of realizing high-speed, high-resolution analog-to-digital converters (ADC’S) because they can be implemented without the need for operational amplifiers having either high gain or a large output swing. Moreover, with conversion rates approaching half those of fully parallel designs, such half-flash architectures provide both a relatively smal...

A 352 288 pixel CMOS image sensor chip with perpixel single-slope ADC and dynamic memory in a standard digital 0.18m CMOS process is described. The chip performs “snapshot” image acquisition, parallel 8-bit A/D conversion, and digital readout at continuous rate of 10 000 frames/s or 1 Gpixels/s with power consumption of 50 mW. Each pixel consists of a photogate circuit, a three-stage comparator...