Now showing items 21-40 of 2128

    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • Charge-transfer-based Gas Sensing Using Atomic-layer MoS2 

      Cho, Byungjin; Hahm, Myung Gwan; Choi, Minseok; Yoon, Jongwon; Kim, Ah Ra; Lee, Young-Joo; Park, Sung-Gyu; Kwon, Jung-Dae; Kim, Chang Su; Song, Myungkwan; Jeong, Yongsoo; Nam, Kee-Seok; Lee, Sangchul; Yoo, Tae Jin; Kang, Chang Goo; Lee, Byoung Hun; Ko, Heung Cho; Ajayan, Pulickel M.; Kim, Dong-Ho (2015-01-27)
      Two-dimensional (2D) molybdenum disulphide (MoS2) atomic layers have a strong potential to be used as 2D electronic sensor components. However, intrinsic synthesis challenges have made this task difficult. In addition, the ...
    • 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 ...
    • Self-assembled large scale metal alloy grid patterns as flexible transparent conductive layers 

      Mohl, Melinda; Dombovari, Aron; Vajtai, Robert; Ajayan, Pulickel M.; Kordas, Krisztian (2015)
      The development of scalable synthesis techniques for optically transparent, electrically conductive coatings is in great demand due to the constantly increasing market price and limited resources of indium for indium tin ...
    • Ppb-level formaldehyde detection using a CW room-temperature interband cascade laser and a miniature dense pattern multipass gas cell 

      Dong, Lei; Yu, Yajun; Li, Chunguang; So, Stephen; Tittel, Frank K. (2015)
      A ppb-level formaldehyde (H2CO) sensor was developed using a thermoelectrically cooled (TEC), continuous-wave (CW) room temperature interband cascade laser (ICL) emitting at 3.59 μm and a miniature dense pattern multipass ...
    • Ambient solid-state mechano-chemical reactions between functionalized carbon nanotubes 

      Kabbani, Mohamad A.; Tiwary, Chandra Sekhar; Autreto, Pedro A.S.; Brunetto, Gustavo; Som, Anirban; Krishnadas, K.R.; Ozden, Sehmus; Hackenberg, Ken P.; Gong, Yongi; Galvao, Douglas S.; Vajtai, Robert; Kabbani, Ahmad T.; Pradeep, Thalappil; Ajayan, Pulickel M. (2015)
      Carbon nanotubes can be chemically modified by attaching various functionalities to their surfaces, although harsh chemical treatments can lead to their break-up into graphene nanostructures. On the other hand, direct ...
    • A New Imaging Platform for Visualizing Biological Effects of Non-Invasive Radiofrequency Electric-Field Cancer Hyperthermia 

      Corr, Stuart J.; Shamsudeen, Sabeel; Vergara, Leoncio A.; Ho, Jason Chak-Shing; Ware, Matthew J.; Keshishian, Vazrik; Yokoi, Kenji; Savage, David J.; Meraz, Ismail M.; Kaluarachchi, Warna; Cisneros, Brandon T.; Raoof, Mustafa; Nguyen, Duy Trac; Zhang, Yingchun; Wilson, Lon J.; Summers, Huw; Rees, Paul; Curley, Steven A.; Serda, Rita E. (2015)
      Herein, we present a novel imaging platform to study the biological effects of non-invasive radiofrequency (RF) electric field cancer hyperthermia. This system allows for real-time in vivointravital microscopy (IVM) imaging ...
    • Stem Cells and Progenitor Cells for Tissue-Engineered Solutions to Congenital Heart Defects 

      Gao, Yang; Jacot, Jeffrey G. (2015)
      Synthetic patches and fixed grafts currently used in the repair of congenital heart defects are nonliving, noncontractile, and not electrically responsive, leading to increased risk of complication, reoperation, and sudden ...
    • Progeny Clustering: A Method to Identify Biological Phenotypes 

      Hu, Chenyue W.; Kornblau, Steven M.; Slater, John H.; Qutub, Amina A. (2015)
      Estimating the optimal number of clusters is a major challenge in applying cluster analysis to any type of dataset, especially to biomedical datasets, which are high-dimensional and complex. Here, we introduce an improved ...
    • Nonlinear elastic buckling and postbuckling analysis of cylindrical panels 

      Zhou, Yang; Stanciulescu, Ilinca; Eason, Thomas; Spottswood, Michael (2015)
      This paper revisits the buckling analysis of a benchmark cylindrical panel undergoing snap-through when subjected to transverse loads. We show that previous studies either overestimated the buckling load and identified a ...
    • In Silico Discovery of High Deliverable Capacity Metal-Organic Frameworks 

      Bao, Yi; Martin, Richard L.; Simon, Cory; Haranczyk, Maciej; Smit, Berend; Deem, Michael W. (2015)
      Metal-organic frameworks (MOFs) are actively being explored as potential adsorbed natural gas storage materials for small vehicles. Experimental exploration of potential materials is limited by the throughput of synthetic ...
    • Discovery of optimal zeolites for challenging separations and chemical transformations using predictive materials modeling 

      Bai, Peng; Jeon, Mi Yeong; Ren, Limin; Knight, Chris; Deem, Michael W.; Tsapatsis, Michael; Siepmann, J. Ilja (2015)
      Zeolites play numerous important roles in modern petroleum refineries and have the potential to advance the production of fuels and chemical feedstocks from renewable resources. The performance of a zeolite as separation ...
    • Multi-endpoint, High-Throughput Study of Nanomaterial Toxicity in Caenorhabditis elegans 

      Jung, Sang-Kyu; Qu, Xiaolei; Aleman-Meza, Boanerges; Wang, Tianxiao; Riepe, Celeste; Liu, Zheng; Li, Qilin; Zhong, Weiwei (2015)
      The booming nanotechnology industry has raised public concerns about the environmental health and safety impact of engineered nanomaterials (ENMs). High-throughput assays are needed to obtain toxicity data for the rapidly ...
    • Proteomic analyses reveal distinct chromatin‐associated and soluble transcription factor complexes 

      Li, Xu; Wang, Wenqi; Wang, Jiadong; Malovannaya, Anna; Xi, Yuanxin; Li, Wei; Guerra, Rudy; Hawke, David H.; Qin, Jun; Chen, Junjie (2015)
      The current knowledge on how transcription factors (TFs), the ultimate targets and executors of cellular signalling pathways, are regulated by protein–protein interactions remains limited. Here, we performed proteomics ...