This report assesses the economics of microalgae biofuels production through an analysis of five production scenarios. These scenarios, or cases, are based on technologies that currently exist or are expected to become available in the near-term,…
Papers in Materials Science
Miscellaneous papers in Materials Science, A
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A straightforward functionalization of a titanium surface using "click" chemistry is reported. A "clickable" titanium surface platform was prepared by the immobilization of an azide-functionalized electroactive catechol anchor and was subsequently…
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A simple preparation of clusters in aqueous solution leads to the formation of colorless blocky crystals. X-ray structure determinations revealed a superlattice framework built up of covalently linked clusters. This superlattice is best described as…
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A "room-temperature" injection molding approach combined with particulate leaching (RTIM/PL) has been, for the first time, developed in this work to fabricate three-dimensional porous scaffolds composed of biodegradable polyesters for tissue…
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An architecture in which n- and p-type materials alternate laterally in the active film of a device with a spatial period of about a carrier diffusion length would lead to efficient (opto)electronic devices for photovoltaic energy conversion and…
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In this paper, we report on the catalytic activity of a new metal nanoparticlepolymer composite consisting of Ag nanoparticles (NPs) and environmentally friendly ('green') chitosan. The polymer (chitosan) not only acted as the reducing agent for the…
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We present a 1.9-GHz Personal Handy-phone System (PHS) transceiver, fully integrated and fabricated in 0.25-mu m CMOS technology. The receiver is based on a 150-kHz low-IF architecture and meets the fast channel switching and DC-offset cancellation…
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This paper presents a hysteretic (sliding mode) control IC for a buck DC/DC converter for use as an envelope tracking power supply to increase the efficiency of an RF power amplifier. The IC integrates a high-bandwidth error amplifier, a comparator…
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Due to their excellent electrical properties, metallic carbon nanotubes are promising materials for interconnect wires in future integrated circuits. Simulations have shown that the use of metallic carbon nanotube interconnects could yield more…
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A digital clock and data recovery circuit employs simple 3-level digital-to-analog converters to interface the digital loop filter to the voltage controlled oscillator and achieves low jitter performance. Test chip fabricated in a 0.13mum CMOS…
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Molecular self-assembly offers a means of spontaneously forming complex and well-defined structures from simple components. The specific bonding between DNA base pairs has been used in this way to create DNA-based nanostructures and to direct the…
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Injection-locked quadrature voltage-controlled oscillators are introduced in this paper as high accuracy, low phase noise, and low-power I and Q generators. A master voltage-controlled oscillator (VCO), running at twice the output frequency, locks…
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The cariogenic potential of Streptococcus mutans is due to the production of organic acids derived from energy metabolism, which implies the need of mechanisms for the organism to tolerate this acidic environment. The F(1)F(o)-ATPase is generally…
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A 352288 pixel CMOS image sensor chip with per-pixel single-slope ADC and dynamic memory in a standard digital 0.18-μm CMOS process is described. The chip performs "snapshot" image acquisition, parallel 8-bit A/D conversion, and digital readout at…
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This paper demonstrates the use an of mixed-signal processing elements, operating according to a SIMD computing scheme, to solve real-time vision problems with a single ship. The prototype, designed in a 0.35μm fully digital CMOS technology,…
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Previous work has questioned how plain films should be used when imaging the cervical spine of trauma patients. The authors wanted to identify whether the National Institute for Clinical Excellence (NICE) guidelines were being followed with respect…
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Regression methods were used to select and score 12 items from the Medical Outcomes Study 36-Item Short-Form Health Survey (SF-36) to reproduce the Physical Component Summary and Mental Component Summary scales in the general US population…
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This paper describes a 128 128 pixel CMOS vision sensor. Each pixel independently and in continuous time quantizes local relative intensity changes to generate spike events. These events appear at the output of the sensor as an asynchronous stream…
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The primary metric for gauging progress in the various semiconductor integrated circuit technologies is the spacing, or pitch, between the most closely spaced wires within a dynamic random access memory (DRAM) circuit. Modern DRAM circuits have 140…
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This paper reports a substantially improved efficiency for a multicrystalline silicon solar cell of 19.8%. This is the highest ever reported efficiency for a multicrystalline silicon cell. The improved multicrystalline cell performance results from…
Papers in associated sub-disciplines
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