Browsing MIT Open Access Articles by Title
Now showing items 8528-8547 of 55906
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Continuous-Flow Bioseparation Using Microfabricated Anisotropic Nanofluidic Sieving Structures
(Nature Publishing Group, 2009-10)The anisotropic nanofluidic-filter (nanofilter) array (ANAANAANA) is a unique molecular-sieving structure for separating biomolecules. In this protocol we describe the fabrication of planar and vertical ANAANAANA chips and ... -
Continuous-flow precipitation of hydroxyapatite in ultrasonic microsystems
(Elsevier BV, 2012-11)This paper describes the continuous-flow precipitation of hydroxyapatite Ca[subscript 5](PO[subscript 4])[subscript 3]OH (HAp) in two ultrasonic microreactors using diluted aqueous solutions of calcium and phosphate at ... -
Continuous-Flow Production of Succinic Anhydrides via Catalytic β-Lactone Carbonylation by Co(CO) 4 ⊂Cr-MIL-101
(American Chemical Society (ACS), 2018)© 2018 American Chemical Society. Industrial synthesis of succinic acid relies on hydrocarbon oxidation or biomass fermentation routes that suffer from energy-costly separation processes. Here we demonstrate an alternate ... -
Continuous-flow synthesis and purification of atropine with sequential in-line separations of structurally similar impurities
(Akadémiai Kiadó Zrt., 2015-04)Flow chemistry has attracted significant interest in pharmaceutical development, where substantial efforts have been directed toward the design of continuous processes. Here, we report a total synthesis of atropine in flow ... -
A Continuous-Time Analysis of Distributed Stochastic Gradient
(MIT Press - Journals, 2020)© 2019 Massachusetts Institute of Technology. We analyze the effect of synchronization on distributed stochastic gradient algorithms. By exploiting an analogy with dynamical models of biological quorum sensing, where ... -
CONTINUOUS-TIME AVERAGE-PRESERVING OPINION DYNAMICS WITH OPINION-DEPENDENT COMMUNICATIONS
(Society for Industrial and Applied Mathematics, 2010-10)We study a simple continuous-time multiagent system related to Krause's model of opinion dynamics: each agent holds a real value, and this value is continuously attracted by every other value differing from it by less than ... -
Continuous-variable quantum enigma machines for long-distance key distribution
(American Physical Society, 2015-12)Quantum physics allows for unconditionally secure communication through insecure communication channels. The achievable rates of quantum-secured communication are fundamentally limited by the laws of quantum physics and ... -
Continuous-Variable Quantum Key Distribution Protocols Over Noisy Channels
(American Physical Society, 2009-03)A continuous-variable quantum key distribution protocol based on squeezed states and heterodyne detection is introduced and shown to attain higher secret key rates over a noisy line than any other one-way Gaussian protocol. ... -
Continuous-variable quantum neural networks
(American Physical Society (APS), 2019-10)We introduce a general method for building neural networks on quantum computers. The quantum neural network is a variational quantum circuit built in the continuous-variable (CV) architecture, which encodes quantum information ... -
Continuous-wave electrically pumped 1.55-mu m edge-emitting platelet ridge laser diodes on silicon
(Institute of Electrical and Electronics Engineers, 2009-06)We report the successful integration on silicon of small footprint, low-threshold electrically pumped edge-emitting lasers by a new approach incorporating microcleaving technology to produce 6-mum-thick platelet lasers ... -
Continuous-wave operation of a frequency-tunable 460-GHz second-harmonic gyrotron for enhanced nuclear magnetic resonance
(Institute of Electrical and Electronics Engineers / IEEE Nuclear and Plasma Sciences Society, 2010-06)The design, operation, and characterization of a continuous-wave (CW) tunable second-harmonic 460-GHz gyrotron are reported. The gyrotron is intended to be used as a submillimeter-wave source for 700-MHz nuclear magnetic ... -
Continuously Adaptive Similarity Search
(Association for Computing Machinery (ACM), 2020-05)Similarity search is the basis for many data analytics techniques, including k-nearest neighbor classification and outlier detection. Similarity search over large data sets relies on i) a distance metric learned from input ... -
Continuously Adaptive Similarity Search
(Association for Computing Machinery (ACM), 2020-05)Similarity search is the basis for many data analytics techniques, including k-nearest neighbor classification and outlier detection. Similarity search over large data sets relies on i) a distance metric learned from input ... -
Continuously Flattening Polyhedra Using Straight Skeletons
(Association for Computing Machinery (ACM), 2014-06)We prove that a surprisingly simple algorithm folds the surface of every convex polyhedron, in any dimension, into a flat folding by a continuous motion, while preserving intrinsic distances and avoiding crossings. The ... -
Continuously Tunable 250 GHz Gyrotron with a Double Disk Window for DNP-NMR Spectroscopy
(Springer-Verlag, 2012-11)In this paper, we describe the design and experimental results from the rebuild of a 250 GHz gyrotron used for Dynamic Nuclear Polarization enhanced Nuclear Magnetic Resonance spectroscopy on a 380 MHz spectrometer. Tuning ... -
Continuously tunable modulation scheme for precision control of optical cavities with variable detuning
(Optical Society of America, 2015-07)We present a scheme for locking optical cavities with arbitrary detuning by many linewidths from resonance using an electro-optic modulator that can provide arbitrary ratios of amplitude-to-phase modulation. We demonstrate ... -
Continuously-Variable Series-Elastic Actuator
(Institute of Electrical and Electronics Engineers, 2013-06)Actuator efficiency is an important factor in the design of powered leg prostheses, orthoses, exoskeletons, and legged robots. A continuously-variable series-elastic actuator (CV-SEA) is presented as an efficient actuator ... -
A continuum model for the growth of dendritic actin networks
(The Royal Society, 2020)Polymerization of dendritic actin networks underlies important mechanical processes in cell biology such as the protrusion of lamellipodia, propulsion of growth cones in dendrites of neurons, intracellular transport of ... -
A continuum model for the growth of dendritic actin networks
(The Royal Society, 2020)Polymerization of dendritic actin networks underlies important mechanical processes in cell biology such as the protrusion of lamellipodia, propulsion of growth cones in dendrites of neurons, intracellular transport of ... -
Continuum modeling of micro-particle electrorotation in Couette and Poiseuille flows—The zero spin viscosity limit
(Elsevier, 2010-05)A continuum mechanical model is presented to analyze the negative electrorheological responses of a particle-liquid mixture with the suspended micro-particles undergoing Quincke rotation for both Couette and Poiseuille ...
