Browsing MIT Open Access Articles by Title
Now showing items 1-20 of 55747
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0-Cycles on Grassmannians as Representations of Projective Groups
(Springer International Publishing, 2019-11-05)Abstract Let F be an infinite division ring, V be a left F-vector space, $$r\ge 1$$r≥1 be an integer. We study the structure of the representation of the linear group $$\mathrm {GL}_F(V)$$GLF(V) in the vector ... -
A 0.077 to 0.168 nJ/bit/iteration Scalable 3GPP LTE Turbo Decoder with an Adaptive Sub-Block Parallel Scheme and an Embedded DVFS Engine
(Institute of Electrical and Electronics Engineers (IEEE), 2010-09)3GPP LTE requires a 100 Mbps of peak bandwidth, and the instantaneous throughput demand changes with different applications. Fixed sub-block parallel turbo decoding scheme introduces bit-error rate (BER) performance drop ... -
A 0.13[mu]m CMOS 78dB SNDR 87mW 20MHz BW CT [Delta Sigma] ADC with VCO-based integrator and quantizer
(Institute of Electrical and Electronics Engineers, 2009-05)In this paper we demonstrate a new technique that eliminates the impact of K[subscript v] nonlinearity by preserving the integral relationship of the VCO output phase to the input signal. Leveraging the VCO output phase ... -
A 0.16mm2 completely on-chip switched-capacitor DC-DC converter using digital capacitance modulation for LDO replacement in 45nm CMOS
(Institute of Electrical and Electronic Engineers, 2010-02)A completely on-chip switched-capacitor DC-DC converter that occupies 0.16 mm2 [mm superscript 2] is implemented in a 45 nm CMOS process. The converter delivers 8 mA output current while maintaining load voltages from 0.8 ... -
A 0.68V 0.68mW 2.4GHz PLL for ultra-low power RF systems
(Institute of Electrical and Electronics Engineers (IEEE), 2015-05)A 2.4GHz PLL consuming 0.68mW has been implemented in 65nm LPCMOS for use in ultra-low power Bluetooth Low Energy (BLE) applications. VCO, charge pump and dynamic flip-flop design optimization allow low voltage operation ... -
A 0.6V 2.9µW mixed-signal front-end for ECG monitoring
(Institute of Electrical and Electronics Engineers (IEEE), 2012-06)This paper presents a mixed-signal ECG front-end that uses aggressive voltage scaling to maximize power-efficiency and facilitate integration with low-voltage DSPs. 50/60Hz interference is canceled using mixed-signal ... -
A 0.6V, 8mW 3D Vision Processor for a Navigation Device for the Visually Impaired
(Institute of Electrical and Electronics Engineers (IEEE), 2016-01)This paper presents an energy-efficient computer vision processor for a navigation device for the visually impaired. Utilizing a shared parallel datapath, out-of-order processing and co-optimization with hardware-oriented ... -
A 0.7-V 1.8-mW H.264/AVC 720p Video Decoder
(Institute of Electrical and Electronics Engineers, 2009-10)The H.264/AVC video coding standard can deliver high compression efficiency at a cost of increased complexity and power. The increasing popularity of video capture and playback on portable devices requires that the power ... -
1 ghz femtosecond erbium-doped fiber lasers
(Optical Society of America, 2010-05)Saturable Bragg reflector (SBR) mode-locked Er-doped fiber lasers around 1550nm with a repetition rate of 1GHz are demonstrated. Key steps to obtain stable, femtosecond pulses by avoiding thermal damage of the SBR are ... -
1 × 1 rush hour with fixed blocks is PSPACE-complete
(Schloss Dagstuhl, Leibniz Center for Informatics, 2021-05)Consider n² - 1 unit-square blocks in an n × n square board, where each block is labeled as movable horizontally (only), movable vertically (only), or immovable - a variation of Rush Hour with only 1 × 1 cars and fixed ... -
1,050 years of Hurricane Strikes on Long Island in The Bahamas
(American Geophysical Union (AGU), 2021-03)Sedimentary records of past hurricane activity indicate centennial-scale periods over the past millennium with elevated hurricane activity. The search for the underlying mechanism behind these active hurricane periods ... -
1,050 years of Hurricane Strikes on Long Island in The Bahamas
(American Geophysical Union (AGU), 2021-03)Sedimentary records of past hurricane activity indicate centennial-scale periods over the past millennium with elevated hurricane activity. The search for the underlying mechanism behind these active hurricane periods ... -
1,2,3, MHC: a review of mass-spectrometry-based immunopeptidomics methods for relative and absolute quantification of pMHCs
(Elsevier BV, 2021)Quantitative mass-spectrometry-based methods to perform relative and absolute quantification of peptides in the immunopeptidome are growing in popularity as researchers aim to measure the dynamic nature of the peptide major ... -
1,2,3-Triazole Derivatives as Novel Antifibrinolytic Drugs
(Multidisciplinary Digital Publishing Institute, 2022-11-29)Fibrinolysis is a natural process that ensures blood fluidity through the removal of fibrin deposits. However, excessive fibrinolytic activity can lead to complications in different circumstances, such as general surgery ... -
1,3-Butadiene-Induced Adenine DNA Adducts Are Genotoxic but Only Weakly Mutagenic When Replicated in Escherichia Coli of Various Repair and Replication Backgrounds
(American Chemical Society (ACS), 2017-05)The adverse effects of the human carcinogen 1,3-butadiene (BD) are believed to be mediated by its DNA-reactive metabolites such as 3,4-epoxybut-1-ene (EB) and 1,2,3,4-diepoxybutane (DEB). The specific DNA adducts responsible ... -
1-D P- and S-wave velocity models for the collision zone between the northern Tianshan mountain and the Junggar basin based on local earthquake data
(Seismological Society of China, 2012-12)We have developed crustal minimum 1-D P- and S-wave velocity models of the collision zone between the northern Tianshan mountain and the Junggar basin (86°E–89°E, 43°N–44.5°N). These two models were created through inversion ... -
1-D Transforms for the Motion Compensation Residual
(Institute of Electrical and Electronics Engineers (IEEE), 2011-03)Transforms used in image coding are also commonly used to compress prediction residuals in video coding. Prediction residuals have different spatial characteristics from images, and it is useful to develop transforms that ... -
A 1.1 nW Energy-Harvesting System with 544 pW Quiescent Power for Next-Generation Implants
(Institute of Electrical and Electronics Engineers (IEEE), 2014-09)This paper presents a nW power management unit (PMU) for an autonomous wireless sensor that sustains itself by harvesting energy from the endocochlear potential (EP), the 70-100 mV electrochemical bio-potential inside the ... -
1.3 mm WAVELENGTH VLBI OF SAGITTARIUS A*: DETECTION OF TIME-VARIABLE EMISSION ON EVENT HORIZON SCALES
(Institute of Physics/American Astronomical Society, 2011-02)Sagittarius A*, the ~4 × 10[superscript 6] M ☉ black hole candidate at the Galactic center, can be studied on Schwarzschild radius scales with (sub)millimeter wavelength very long baseline interferometry (VLBI). We report ... -
1.8-μm thulium microlasers integrated on silicon
(SPIE, 2016-02)A key challenge for silicon photonic systems is the development of compact on-chip light sources. Thulium-doped fiber and waveguide lasers have recently generated interest for their highly efficient emission around 1.8 μm, ...
