Now showing items 61-120 of 2261

    • Effect of Surfactant Partitioning Between Gaseous Phase and Aqueous Phase onᅠCO2ᅠFoam Transport for Enhanced Oil Recovery 

      Zeng, Yongchao; Ma, Kun; Farajzadeh, Rouhi; Puerto, Maura; Biswal, Sibani L.; Hirasaki, George J. (2016)
      CO2 flood is one of the most successful and promising enhanced oil recovery technologies. However the displacement is limited by viscous fingering, gravity segregation and reservoir heterogeneity. Foaming the CO2 and brine ...
    • Role of Gas Type on Foam Transport in Porous Media 

      Zeng, Yongchao; Farajzadeh, Rouhi; Eftekhari, Ali Akbar; Vincent-Bonnieu, Sebastien; Muthuswamy, Aarthi; Rossen, William R.; Hirasaki, George J.; Biswal, Sibani L. (2016)
      We present the results of an experimental investigation of the effect of gas type and composition on foam transport in porous media. Steady-state foam strengths with respect to three cases of distinct gases and two cases ...
    • Dynamics of paramagnetic squares in uniform magnetic fields 

      Du, Di; He, Peng; Zeng, Yongchao; Biswal, Sibani Lisa (2016)
      The magnetic forces between paramagnetic squares cannot be calculated using a classic dipolar model because the magnetic field distribution is not uniform within square particles. Here, we present the calculation of magnetic ...
    • Signatures of Biomass Burning Aerosols in the Plume of a Saltmarsh Wildfire in South Texas 

      Myers-Pigg, Allison N.; Griffin, Robert J.; Louchouarn, Patrick; Norwood, Matthew J.; Sterne, Amanda; Cevik, Basak Karakurt (2016)
      The most conventional and abundant tracers of biomass combustion in aerosol particles include potassium and biomarkers derived from thermally altered cellulose/hemicellulose (anhydrosugars) and lignin (methoxyphenols). ...
    • Insights on Foam Transport from a Texture-Implicit Local-Equilibrium Model with an Improved Parameter Estimation Algorithm 

      Zeng, Yongchao; Muthuswamy, Aarthi; Ma, Kun; Wang, Le; Farajzadeh, Rouhi; Puerto, Maura; Vincent-Bonnieu, Sebastien; Akbar Eftekhari, Ali; Wang, Ying; Da, Chang; Joyce, Jeffrey C.; Biswal, Sibani L.; Hirasaki, George J. (2016)
      We present an insightful discussion on the implications of foam transport inside porous media based on an improved algorithm for the estimation of model parameters. A widely used texture-implicit local-equilibrium foam ...
    • Role of Gas Type on Foam Transport in Porous Media 

      Zeng, Yongchao; Farajzadeh, Rouhi; Eftekhari, Ali Akbar; Vincent-Bonnieu, Sebastien; Muthuswamy, Aarthi; Rossen, William R.; Hirasaki, George J.; Biswal, Sibani L. (2016)
      We present the results of an experimental investigation of the effect of gas type and composition on foam transport in porous media. Steady-state foam strengths with respect to three cases of distinct gases and two cases ...
    • Ring-locking enables selective anhydrosugar synthesis from carbohydrate pyrolysis 

      Chen, Li; Zhao, Jinmo; Pradhan, Sivaram; Brinson, Bruce E.; Scuseria, Gustavo E.; Zhang, Z. Conrad; Wong, Michael S. (2016)
      The selective production of platform chemicals from thermal conversion of biomass-derived carbohydrates is challenging. As precursors to natural products and drug molecules, anhydrosugars are difficult to synthesize from ...
    • Examining Asphaltene Solubility on Deposition in Model Porous Media 

      Lin, Yu-Jiun; He, Peng; Tavakkoli, Mohammad; Mathew, Nevin Thunduvila; Fatt, Yap Yit; Chai, John C.; Goharzadeh, Afshin; Vargas, Francisco M.; Biswal, Sibani Lisa (2016)
      Asphaltenes are known to cause severe flow assurance problems in the near-wellbore region of oil reservoirs. Understanding the mechanism of asphaltene deposition in porous media is of great significance for the development ...
    • Evaluating Multihop Mobile Wireless Networks with Controllable Node Sparsity or Density 

      Amiri, Keyvan (2015-12-04)
      Simulation is the most widely used tool for evaluating the performance of multihop mobile wireless networks, yet such simulation has so far been limited due to the lack of sufficient wireless mobility models for creating ...
    • Inference by Reparameterization using Neural Population Codes 

      Vasudeva Raju, Rajkumar (2015-12-04)
      Behavioral experiments on humans and animals suggest that the brain performs probabilistic inference to interpret its environment. Here we present a general-purpose, biologically plausible implementation of approximate ...
    • Rethinking Image Compression for the Object Detection Task 

      Barua, Souptik (2015-12-03)
      Traditionally, image compression algorithms, such as JPEG, have been designed for human viewers' satisfaction. Increasingly however, more and more images are being viewed by computers, for performing computer vision tasks ...
    • Nonlinear neural codes 

      Yang, Qianli (2015-12-03)
      Most natural task-relevant variables are encoded in the early sensory cortex in a form that can only be decoded nonlinearly. Yet despite being a core function of the brain, nonlinear population codes are rarely studied and ...
    • MIMO Broadcast Channels with Full-duplex feedback 

      Du, Xu (2015-12-03)
      In this thesis, I utilize full-duplex radios to increase the downlink spectral efficiency of MIMO broadcast channels by proposing a sequential beamforming strategy. In current half-duplex multiuser MIMO systems, non-trivial ...
    • Full-duplex Wireless with Large Antenna Arrays 

      Everett, Evan Jackson (2015-12-03)
      To meet the growing demand for wireless data, base stations with very large antenna arrays are being deployed in order to serve multiple users simultaneously. Concurrently, there is growing interest in full-duplex operation. ...
    • GPU Accelerated Reconfigurable Detector and Precoder for Massive MIMO SDR Systems 

      Li, Kaipeng (2015-12-02)
      We present a reconfigurable GPU-based unified detector and precoder for massive MIMO software-defined radio systems. To enable high throughput, we implement the linear minimum mean square error detector/precoder and further ...
    • A Resource-Aware Streaming-based Framework for Big Data Analysis 

      Darvish Rouhani, Bita (2015-12-02)
      The ever growing body of digital data is challenging conventional analytical techniques in machine learning, computer vision, and signal processing. Traditional analytical methods have been mainly developed based on the ...
    • Wafer-scale films of aligned single-wall carbon nanotubes: preparation, characterization, and optoelectronic applications 

      He, Xiaowei (2015-11-20)
      Single-wall carbon nanotubes (SWCNTs) are one-dimensional materials defined by a cylindrical and hollow structure with aspect ratios of up to 10^7:1. Individual SWCNTs have been shown to possess excellent electric, optical, ...
    • A maximum pseudo-likelihood approach for phylogenetic networks 

      Yu, Yun; Nakhleh, Luay (2015-10-02)
      Abstract Background Several phylogenomic analyses have recently demonstrated the need to account simultaneously for incomplete lineage sorting (ILS) and hybridization when ...
    • Methods for Ripple Detection and Spike Sorting During Hippocampal Replay 

      Sethi, Ankit (2015-09-21)
      In the rat hippocampus, fast oscillations termed sharp wave ripples and an associated sequential firing of neurons, termed replay, have been identified as playing a crucial role in memory formation and learning. The term ...
    • Imaging and Visual Classification by Knowledge-Enhanced Compressive Imaging 

      Li, Yun (2015-09-10)
      Compressive imaging is a technology that uses multiplexed measurements and the sparsity of many natural images to efficiently capture and reconstruct images. The compressive single pixel camera is one embodiment of such ...
    • Molecular Plasmonics: Graphene Plasmons in the Picoscale Limit 

      Lauchner, Adam (2015-08-20)
      Doped graphene supports surface plasmons in the mid- to far-infrared that are both electrically and spatially tunable. Graphene has been shown to enable greater spatial confinement of the plasmon and fewer losses than ...
    • High-speed Track and Hold Amplifiers in CMOS for Enabling Pulse-based Direct Modulation, Secure Communication and Precision Localization 

      Aggrawal, Himanshu (2015-08-06)
      Last few decades have seen a puissant desire for fast communication links that has shaped the evolution of high-speed circuits and silicon- based technology. This desire accompanied with a large consumer market has fueled ...
    • Design and Implementation of I/O Servers Using the Device File Boundary 

      Amiri Sani, Ardalan (2015-07-31)
      Due to historical reasons, today's computer systems treat I/O devices as second-class citizens, supporting them with ad hoc and poorly-developed system software. As I/O devices are getting more diverse and are taking a ...
    • Investigating irregularly patterned deep brain stimulation signal design using biophysical models 

      Summerson, Samantha R.; Aazhang, Behnaam; Kemere, Caleb (2015-06)
      Parkinson's disease (PD) is a neurodegenerative disorder which follows from cell loss of dopaminergic neurons in the substantia nigra pars compacta (SNc), a nucleus in the basal ganglia (BG). Deep brain stimulation (DBS) ...
    • MU-MIMO WLANs in Diverse Bands and Environments 

      Anand, Narendra (2015-04-24)
      Multi-user MIMO (MU-MIMO) is a precoding technique that allows for an Access Point (AP) to transmit data to multiple receivers in parallel resulting in an overall capacity increase. However, achieving these gains requires ...
    • Protocol Design and Experimental Evaluation for Efficient Multi-User MIMO Wireless Networks 

      Bejarano Chavez, Oscar (2015-04-24)
      Information theoretic results on Multi-User MIMO (MU-MIMO) have demonstrated a many-fold increase in capacity compared to Single-Input Single-Output. By leveraging multiple antennas at the Access Point (AP) and beamforming ...
    • Client Beamforming for Rate Scalability of MU-MIMO Networks 

      Yu, Hang (2015-04-24)
      The multi-user MIMO (MU-MIMO) technology allows an AP with multiple antennas to simultaneously serve multiple clients to improve the network capacity. To achieve this, the AP leverages zero-forcing beamforming (ZFBF) to ...
    • A Data and Platform-Aware Framework For Large-Scale Machine Learning 

      Mirhoseini, Azalia (2015-04-24)
      This thesis introduces a novel framework for execution of a broad class of iterative machine learning algorithms on massive and dense (non-sparse) datasets. Several classes of critical and fast-growing data, including image ...
    • Imaging Plasmons with Compressive Hyperspectral Microscopy 

      Lu, Liyang (2015-04-23)
      With the ability of revealing the interactions between objects and electromagnetic waves, hyperspectral imaging in optical microscopy is of great importance in the study of various micro/nano-scale physical and chemical ...
    • WrAP: Hardware and Software Support for Atomic Persistence in Storage Class Memory 

      Giles, Ellis Robinson (2015-04-23)
      In-memory computing is gaining popularity as a means of sidestepping the performance bottlenecks of traditional block-based storage devices. However, the volatile nature of DRAM makes these systems vulnerable to system ...
    • Compressive Sensing in Positron Emission Tomography (PET) Imaging 

      Valiollahzadeh, Majid (2015-04-16)
      Positron emission tomography (PET) is a nuclear medicine functional imaging modality, applicable to several clinical problems, but especially in detecting the metabolic activity (as in cancer). PET scanners use multiple ...
    • Virtual Ring Buffer for Camera Application Concurrency 

      Reyes, Jose Eduardo (2015-01-26)
      Smartphones with integrated cameras have inspired a growing number of real- time, computer vision applications. Existing camera software architectures, however, do not support concurrency: only one application accesses the ...
    • Improved Angiogenesis in Response to Localized Delivery of Macrophage-Recruiting Molecules 

      Hsu, Chih-Wei; Poché, Ross A.; Saik, Jennifer E.; Ali, Saniya; Wang, Shang; Yosef, Nejla; Calderon, Gisele A.; Scott, Larry Jr.; Vadakkan, Tegy J.; Larina, Irina V.; West, Jennifer L.; Dickinson, Mary E. (2015)
      Successful engineering of complex organs requires improved methods to promote rapid and stable vascularization of artificial tissue scaffolds. Toward this goal, tissue engineering strategies utilize the release of ...
    • Laminin Peptide-Immobilized Hydrogels Modulate Valve Endothelial Cell Hemostatic Regulation 

      Balaoing, Liezl Rae; Post, Allison Davis; Lin, Adam Yuh; Tseng, Hubert; Moake, Joel L.; Grande-Allen, K. Jane (2015)
      Valve endothelial cells (VEC) have unique phenotypic responses relative to other types of vascular endothelial cells and have highly sensitive hemostatic functions affected by changes in valve tissues. Furthermore, effects ...
    • An Alternative Approach for Estimating the Accuracy of Colposcopy in Detecting Cervical Precancer 

      Davies, Kalatu R.; Cantor, Scott B.; Cox, Dennis D.; Follen, Michele (2015)
      Introduction: Since colposcopy helps to detect cervical cancer in its precancerous stages, as new strategies and technologies are developed for the clinical management of cervical neoplasia, precisely determining the ...
    • Nanoantenna-Enhanced Light-Matter Interaction in Atomically Thin WS2 

      Kern, Johannes; Trügler, Andreas; Niehues, Iris; Ewering, Johannes; Schmidt, Robert; Schneider, Robert; Najmaei, Sina; George, Antony; Zhang, Jing; Lou, Jun; Hohenester, Ulrich; de Vasconcellos, Steffen Michaelis; Bratschitsch, Rudolf (2015)
      Atomically thin transition metal dichalcogenides (TMDCs) are an emerging class of two-dimensional semiconductors. Recently, the first optoelectronic devices featuring photodetection as well as electroluminescence have been ...
    • Charge Transfer Plasmons: Optical Frequency Conductances and Tunable Infrared Resonances 

      Wen, Fangfang; Zhang, Yue; Gottheim, Samuel; King, Nicholas S.; Zhang, Yu; Nordlander, Peter; Halas, Naomi J. (2015)
      A charge transfer plasmon (CTP) appears when an optical-frequency conductive pathway between two metallic nanoparticles is established, enabling the transfer of charge between nanoparticles when the plasmon is excited. ...
    • Three-Dimensional Networked Nanoporous Ta2O5–x Memory System for Ultrahigh Density Storage 

      Wang, Gunuk; Lee, Jae-Hwang; Yang, Yang; Ruan, Gedeng; Kim, Nam Dong; Ji, Yongsung; Tour, James M. (2015)
      Oxide-based resistive memory systems have high near-term promise for use in nonvolatile memory. Here we introduce a memory system employing a three-dimensional (3D) networked nanoporous (NP) Ta2O5-x structure and graphene ...
    • Direct Plasmon-Driven Photoelectrocatalysis 

      Robatjazi, Hossein; Bahauddin, Shah Mohammad; Doiron, Chloe; Thomann, Isabell (2015)
      Harnessing the energy from hot charge carriers is an emerging research area with the potential to improve energy conversion technologies. Here we present a novel plasmonic photoelectrode architecture carefully designed to ...
    • Distinguishing between plasmon-induced and photoexcited carriers in a device geometry 

      Zheng, Bob Y.; Zhao, Hangqi; Manjavacas, Alejandro; McClain, Michael; Nordlander, Peter (2015)
      The use of surface plasmons, charge density oscillations of conduction electrons of metallic nanostructures, to boost the efficiency of light-harvesting devices through increased light-matter interactions could drastically ...
    • Micro-anatomical quantitative optical imaging: toward automated assessment of breast tissues 

      Dobbs, Jessica L.; Mueller, Jenna L.; Krishnamurthy, Savitri; Shin, Dongsuk; Kuerer, Henry; Yang, Wei; Ramanujam, Nirmala; Richards-Kortum, Rebecca (2015)
      Introduction: Pathologists currently diagnose breast lesions through histologic assessment, which requires fixation and tissue preparation. The diagnostic criteria used to classify breast lesions are qualitative and ...
    • In vivo microscopy of hemozoin: towards a needle free diagnostic for malaria 

      Burnett, Jennifer L.; Carns, Jennifer L.; Richards-Kortum, Rebecca (2015)
      Clinical diagnosis of malaria suffers from poor specificity leading to overtreatment with antimalarial medications. Alternatives, like blood smear microscopy or antigen-based tests, require a blood sample. We investigate ...
    • In vivo classification of colorectal neoplasia using high-resolution microendoscopy: Improvement with experience 

      Parikh, Neil D.; Perl, Daniel; Lee, Michelle H.; Chang, Shannon S.; Polydorides, Alexandros D.; Moshier, Erin; Godbold, James; Zhou, Elinor; Mitcham, Josephine; Richards-Kortum, Rebecca; Anandasabapathy, Sharmila (2015)
      Background and Aims: High-resolution microendoscopy (HRME) is a novel, low-cost “optical biopsy” technology that allows for subcellular imaging. The study aim was to evaluate the learning curve of HRME for the differentiation ...
    • Practical high-fidelity frequency-domain force and location identification 

      Ghaderi, Pooya; Dick, Andrew J.; Foley, Jason R.; Falbo, Gregory (2015)
      Identifying the force information and location of an impact event is important for predicting and/or monitoring potential damage to the structures. Directly measuring the impact event and/or locating the impact force is ...
    • On computing minimal independent support and its applications to sampling and counting 

      Ivrii, Alexander; Malik, Sharad; Meel, Kuldeep S.; Vardi, Moshe Y. (2015)
      Constrained sampling and counting are two fundamental problems arising in domains ranging from artificial intelligence and security, to hardware and software testing. Recent approaches to approximate solutions for these ...
    • Influence of satellite-derived photolysis rates and NOxᅠemissions on Texas ozone modeling 

      Tang, W.; Cohan, D.S.; Pour-Biazar, A.; Lamsal, L.N.; White, A.T.; Xiao, X.; Zhou, W.; Henderson, B.H.; Lash, B.F. (2015)
       Uncertain photolysis rates and emission inventory impair the accuracy of state-level ozone (O3) regulatory modeling. Past studies have separately used satellite-observed clouds to correct the model-predicted photolysis ...
    • Prostate cancer and neuroendocrine differentiation: more neuronal, less endocrine? 

      Grigore, Alexandru Dan; Ben-Jacob, Eshel; Farach-Carson, Mary C. (2015)
      Neuroendocrine differentiation (NED) marks a structural and functional feature of certain cancers, including prostate cancer (PCa), whereby the malignant tissue contains a significant proportion of cells displaying neuronal, ...
    • Hall and field-effect mobilities in few layeredᅠp-WSe2ᅠfield-effect transistors 

      Pradhan, N.R.; Rhodes, D.; Memaran, S.; Poumirol, J.M.; Smirnov, D.; Talapatra, S.; Feng, S.; Perea-Lopez, N.; Elias, A.L.; Terrones, M.; Ajayan, P.M.; Balicas, L. (2015)
      Here, we present a temperature (T) dependent comparison between field-effect and Hall mobilities in field-effect transistors based on few-layered WSe2 exfoliated onto SiO2. Without dielectric engineering and beyond a ...
    • Prenatal exposure to cadmium and cotinine and CpG island DNA methylation in mother-infant pairs 

      Gona, Saideep; Sanders, Alison P.; Miranda, Marie Lynn; Fry, Rebecca C. (2015)
      A precise biological mechanism by which cadmium acts as a developmental toxicant is unknown but is suggested to include an epigenetic basis. In prior work, we analyzed CpG island methylation levels within gene promoters ...
    • Feasibility of transoral robotic-assisted high-resolution microendoscopic imaging of oropharyngeal squamous cell carcinoma 

      Patsias, Alexis; Giraldez-Rodriguez, Laureano A.; Polydorides, Alexandros D.; Richards-Kortum, Rebecca; Anandasabapathy, Sharmila; Quang, Timothy; Sikora, Andrew G.; Miles, Brett A. (2015)
      Background: Transoral robotic-assisted oncologic surgery of the head and neck offers promising functional results. Nonetheless, the efficacy of oncologic surgery remains critically dependent on obtaining negative margins. ...
    • Implications of the hybrid epithelial/mesenchymal phenotype in metastasis 

      Jolly, Mohit Kumar; Boareto, Marcelo; Huang, Bin; Jia, Dongya; Lu, Mingyang; Ben-Jacob, Eshel; Onuchic, José N.; Levine, Herbert (2015)
      Transitions between epithelial and mesenchymal phenotypes - the epithelial to -mesenchymal transition (EMT) and its reverse the mesenchymal to epithelial transition (MET) - are hallmarks of cancer metastasis. While ...
    • Factors affecting ambulance utilization for asthma attack treatment: understanding where to target interventions 

      Raun, L.H.; Ensor, K.B.; Campos, L.A.; Persse, D. (2015)
      Objectives: Asthma is a serious, sometimes fatal condition, in which attacks vary in severity, potentially requiring emergency medical services (EMS) ambulance treatment. A portion of asthma attacks requiring EMS ambulance ...
    • Genetic and Chemical Activation of TFEB Mediates Clearance of Aggregated α-Synuclein 

      Kilpatrick, Kiri; Zeng, Yimeng; Hancock, Tommy; Segatori, Laura (2015)
      Aggregation of α-synuclein (α-syn) is associated with the development of a number of neurodegenerative diseases, including Parkinson’s disease (PD). The formation of α-syn aggregates results from aberrant accumulation of ...
    • HSulf-1 deficiency dictates a metabolic reprograming of glycolysis and TCA cycle in ovarian cancer 

      Mondal, Susmita; Roy, Debarshi; Camacho-Pereira, Juliana; Khurana, Ashwani; Chini, Eduardo; Yang, Lifeng; Baddour, Joelle; Stilles, Katherine; Padmabandu, Seth; Leung, Sam; Kalloger, Steve; Gilks, Blake; Lowe, Val; Dierks, Thomas; Hammond, Edward; Dredge, Keith; Nagrath, Deepak; Shridhar, Viji (2015)
      Warburg effect has emerged as a potential hallmark of many cancers. However, the molecular mechanisms that led to this metabolic state of aerobic glycolysis, particularly in ovarian cancer (OVCA) have not been completely ...
    • Coupling the modules of EMT and stemness: A tunable ‘stemness window’ model 

      Jolly, Mohit Kumar; Jia, Dongya; Boareto, Marcelo; Mani, Sendurai A.; Pienta, Kenneth J.; Ben-Jacob, Eshel; Levine, Herbert (2015)
      Metastasis of carcinoma involves migration of tumor cells to distant organs and initiate secondary tumors. Migration requires a complete or partial Epithelial-to-Mesenchymal Transition (EMT), and tumor-initiation requires ...
    • Evolution of the ᅠPerlecan/HSPG2ᅠ Gene and Its Activation in Regeneratingᅠ Nematostella vectensis 

      Warren, Curtis R.; Kassir, Elias; Spurlin, James; Martinez, Jerahme; Putnam, Nicholas H.; Farach-Carson, Mary C. (2015)
      The heparan sulfate proteoglycan 2 (HSPG2)/perlecan gene is ancient and conserved in all triploblastic species. Its presence maintains critical cell boundaries in tissue and its large (up to ~900 kDa) modular structure has ...
    • Mechanism for Collective Cell Alignment inᅠ Myxococcus xanthus Bacteria 

      Balagam, Rajesh; Igoshin, Oleg A. (2015)
      Myxococcus xanthusᅠcells self-organize into aligned groups, clusters, at various stages of their lifecycle. Formation of these clusters is crucial for the complex dynamic multi-cellular behavior of these bacteria. However, ...
    • Transaction local aliasing in storage class memory 

      Giles, Ellis; Doshi, Kshitij; Varman, Peter (2015)
      This paper describes a lightweight software library to solve the challenges [6], [3], [1], [5], [2] of programming storage class memory (SCM). It provides primitives to demarcate failure-atomic code regions. SCM loads and ...
    • Photoluminescence of a Plasmonic Molecule 

      Huang, Da; Byers, Chad P.; Wang, Lin-Yung; Hoggard, Anneli; Hoener, Ben; Chang, Wei-Shun; Landes, Christy F.; Link, Stephan (2015)
      Photoluminescent Au nanoparticles are appealing for biosensing and bioimaging applications because of their non-photobleaching and non-photoblinking emission. The mechanism of one-photon photoluminescence from plasmonic ...