gebhart/patrepeval huggingface dataset:
Dynamic Nuclear Polarization Efficiency Increased by Very Fast Magic Angle Spinning (2017)

Dynamic nuclear polarization (DNP) has recently emerged as a tool to enhance the sensitivity of solid-state NMR experiments. However, so far high enhancements (>100) are limited to relatively low magnetic fields, and DNP at fields higher than 9.4 T significantly drops in efficiency. Here we report solid-state Overhauser effect DNP enhancements of over 100 at 18.8 T. This is achieved through the unexpected discovery that enhancements increase rapidly with increasing magic angle spinning (MAS) rates. The measurements are made using 1,3-bisdiphenylene-2-phenylallyl dissolved in o-terphenyl at 40 kHz MAS. We introduce a source-sink diffusion model for polarization transfer which is capable of explaining the experimental observations. The advantage of this approach is demonstrated on mesoporous alumina with the acquisition of well-resolved DNP surface-enhanced <sup>27</sup>Al cross-polarization spectra.
Holographic Antenna with Low Surface Impedance Sensitivity Unit Cell (2021)

This paper proposes a holographic antenna using a single/double inter-digital shape unit cells that have a wide surface impedance range and reduce the surface impedance sensitivity on a high relative permittivity and a thin substrate. The proposed holographic antenna operates in 24 GHz, and the maximum gain of the holographic antenna with the proposed method is gain 8 dBi at 33°. Moreover, the proposed antenna satisfied the low surface impedance sensitivity.
IEEE Transactions on Green Communications and Computing: New Research Scope (2020)

This journal began in 2017, under the leadership of Founding Editor-in-Chief Prof. Ender Ayanoglou. On August 1 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">st</sup> 2020, Prof. Zhisheng Niu from Tsinghua University took over from Ender in this leadership role. The decision was taken to revise the structure of the journal and review the scope of the journal in detail. In his first editorial [1], Prof. Niu has emphasised the fundamental research question around “how can Send More Information bits with Less Energy (SMILE)?” and recommended exploring “Energy Informatics for Smart Interaction of Energy and Information (EINSTEIN).” This article introduces the new editorial team and provides highlights of the journal's past, present and future.
A Comparison of Cationic Zirconium Methyl and Isobutyl Initiators that Contain an Arylated Diamido-Pyridine Ligand for Polymerization of 1-Hexene. Elucidation of a Dramatic “Initiator Effect” (2000)

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTA Comparison of Cationic Zirconium Methyl and Isobutyl Initiators that Contain an Arylated Diamido-Pyridine Ligand for Polymerization of 1-Hexene. Elucidation of a Dramatic "Initiator Effect"Parisa Mehrkhodavandi, Peter J. Bonitatebus, and Richard R. SchrockView Author Information Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Cite this: J. Am. Chem. Soc. 2000, 122, 32, 7841–7842Publication Date (Web):July 29, 2000Publication History Received3 March 2000Published online29 July 2000Published inissue 1 August 2000https://pubs.acs.org/doi/10.1021/ja000772vhttps://doi.org/10.1021/ja000772vrapid-communicationACS PublicationsCopyright © 2000 American Chemical SocietyRequest reuse permissionsArticle Views650Altmetric-Citations84LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-AlertscloseSupporting Info (1)»Supporting Information Supporting Information SUBJECTS:Alkyls,Ligands,Nuclear magnetic resonance spectroscopy,Polymerization,Reaction products Get e-Alerts
EXOCHI (2007)

Future mainstream microprocessors will likely integrate specialized accelerators, such as GPUs, onto a single die to achieve better performance and power efficiency. However, it remains a keen challenge to program such a heterogeneous multicore platform, since these specialized accelerators feature ISAs and functionality that are significantly different from the general purpose CPU cores. In this paper, we present EXOCHI: (1) Exoskeleton Sequencer (EXO), an architecture to represent heterogeneous acceleratorsas ISA-based MIMD architecture resources, and a shared virtual memory heterogeneous multithreaded program execution model that tightly couples specialized accelerator cores with generalpurpose CPU cores, and (2) C for Heterogeneous Integration (CHI), an integrated C/C++ programming environment that supports accelerator-specific inline assembly and domain-specific languages. The CHI compiler extends the OpenMP pragma for heterogeneous multithreading programming, and produces a single fat binary with code sections corresponding to different instruction sets. The runtime can judiciously spread parallel computation across the heterogeneous cores to optimize performance and power. We have prototyped the EXO architecture on a physical heterogeneous platform consisting of an Intel® Core™ 2 Duo processor and an 8-core 32-thread Intel® Graphics Media Accelerator X3000. In addition, we have implemented the CHI integrated programming environment with the Intel® C++ Compiler, runtime toolset, and debugger. On the EXO prototype system, we have enhanced a suite of production-quality media kernels for video and image processing to utilize the accelerator through the CHI programming interface, achieving significant speedup (1.41X to10.97X) over execution on the IA32 CPU alone.
Fabrication of InGaAs quantum dots by metal organic chemical vapor deposition and selective area epitaxy (2004)

We have demonstrated the fabrication of uniform arrays of quantum dots by metal organic chemical vapor deposition using electron beam lithography and selective area epitaxy techniques. Photoluminescence data showing emission at 1250 nm is presented.
Characterization of IgG and IgG Subclass Antibodies Present in Paired Maternal and Fetal Serum Which Are Directed Against HIV-1 Proteins (1991)

Passive immunity is conferred to the fetus by maternal antibodies, the majority of which are transported across the placenta during the third trimester of pregnancy. To determine the placental transport of anti-HIV-1 antibodies, serum from 5 women infected with human immunodeficiency virus (HIV) and their abortuses were examined for anti-HIV-1 antibodies. The gestational age of the abortuses ranged from 18 to 24 weeks and following polymerase chain reaction amplification, HIV-1 gag DNA was detected in tissue from 2 of the abortuses. The concentration of total IgG antibodies present in cord blood ranged from 2.9% to 12.5% of maternal levels. Antibodies directed against the envelope proteins, gp160 and gp120, the reverse transcriptase protein, p66, and the capsular protein, p24, were present in fetal and maternal serum. Although IgG1 was the predominant subclass antibody generated in response to HIV-1 proteins, IgG2, IgG3, and IgG4 directed against HIV-1 proteins were also detected. There were large differences in the antigens recognized by the antibodies produced in the mothers, and the IgG subclasses of the antibodies produced. HIV-1 proteins recognized by antibodies present in cord blood were similar to those recognized by paired maternal serum and IgG1, IgG2, IgG3 recognizing HIV-1 proteins were detected in fetal serum. However, there was a dichotomy in placental transport of IgG subclass antibodies to HIV-1 proteins. The role of these antibodies in prevention of vertical transmission of HIV-1 has yet to be determined.
Casing Expansion as a Promising Solution for Microannular Gas Migration (2014)

Summary The objective of this research was to investigate the potential effect of expandable-casing technology on the cement sheath and remediation of sustained casing pressure (SCP) caused by microannular gas migration. Varying magnitudes of SCP exist in the Gulf of Mexico, where more than 80% of casing strings exhibiting SCP are production and surface casings, representing a great technical, economic, and environmental risk. Situations in which SCP is observed usually result in costly and frequently unsuccessful remediation efforts. A unique bench-scale physical model was used to simulate expansion of a previously cemented casing under field-like conditions. Experimental measurements obtained before and after low-percentage pipe expansion exhibited improvement of cement/pipe interface. Successful multirate flow-through experiments with nitrogen gas showed the effectiveness of this technique in sealing of microannular-gas-leakage pathways, providing ideal remediation of SCP immediately post-expansion; and after up to 60 days of post-expansion, the seal integrity was intact.
Thermal challenges in the next generation of computer, telecommunication, and military electronic equipment (2005)

The electronic design community is facing a new phase of thermal challenges in the present and future electronic and optical packaging. It is very common to have localized high-heat-flux components located within the system in direct proximity to other components, which are very sensitive to temperature. This is especially true when the system contains both optical and electronic devices. The current trend of using system-on-chip packaging often results in high-heat-flux devices within the system. On the other hand, the present and next generation of civilian and military electronic equipment needs to be able to accommodate high- heat-fluxes in the same given physical space as equipment developed in the 1990s. Appropriate thermal management techniques need to be introduced, which will satisfy the reliability, maintainability, and availability of the system. In addition, these techniques must be economically acceptable. This panel will address the limitations of the air-cooling, the extension of the air-cooling limits through unique air-cooling technologies, refrigeration cooling, liquid cooling, liquid immersion cooling, and two-phase cooling.
Distributed control algorithms for service differentiation in wireless packet networks (2002)

This paper investigates differentiated services in wireless packet networks using a fully distributed approach that supports service differentiation, radio monitoring and admission control. Service differentiation is based on the IEEE 802.11 distributed coordination function (DCF) originally designed to support best-effort data services. We extend the distributed coordination function to provide service differentiation for delay sensitive and best-effort traffic. Two distributed estimation algorithms are proposed and analyzed. A virtual MAC (VMAC) algorithm passively monitors the radio channel and estimates locally achievable service levels. The virtual MAC estimates key MAC level statistics related to service quality such as delay, delay variation, packet collision and packet loss. We show the efficiency of the virtual MAC algorithm and consider significantly overlapping cells and highly bursty traffic mixes. A virtual source (VS) algorithm utilizes the virtual MAC to estimate application level service quality. The virtual source allows application parameters to be tuned in response to dynamic channel conditions based on "virtual delay curves". We demonstrate through simulation that when these distributed virtual algorithms are applied to the admission control of the radio channel then a globally stable state can be maintained without the need for complex centralized radio resource management. Finally, we discuss a distributed service level management scheme that builds on the proposed algorithms to offer continuous service with handoff.
Speeding Up Big-Numbers Squaring (2012)

This paper deals with optimizations for big-numbers (multi-precision) squaring, and their efficient implementation on x86-64 platforms. Such optimizations have various usages, and a most prominent one is RSA acceleration, where big-numbers squaring consumes a significant portion of the computations. We introduce an algorithm for big-numbers squaring, that reduces the number of single precision add-with-carry operations, and trades several additions with a single left shift operation. When measured on the 2nd Generation Intel <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">®</sup> Core™ processor, for 512-bit operands, our algorithm is roughly 1.4 times faster than the implementation of GMP library 5.0.2. For 1024-bit operands, our implementation is 1.2 times faster than that of the GMP library 5.0.2. Our optimization is used in a recently posted Open SSL patch [4] for accelerating modular exponentiation for RSA.
Discovering Multi-Hardware Mobile Models via Architecture Search (2020)

Hardware-aware neural architecture designs have been predominantly focusing on optimizing model performance on single hardware and model development complexity, where another important factor, model deployment complexity, has been largely ignored. In this paper, we argue that, for applications that may be deployed on multiple hardware, having different single-hardware models across the deployed hardware makes it hard to guarantee consistent outputs across hardware and duplicates engineering work for debugging and fixing. To minimize such deployment cost, we propose an alternative solution, multi-hardware models, where a single architecture is developed for multiple hardware. With thoughtful search space design and incorporating the proposed multi-hardware metrics in neural architecture search, we discover multi-hardware models that give state-of-the-art (SoTA) performance across multiple hardware in both average and worse case scenarios. For performance on individual hardware, the single multi-hardware model yields similar or better results than SoTA performance on accelerators like GPU, DSP and EdgeTPU which was achieved by different models, while having similar performance with MobilenetV3 Large Minimalistic model on mobile CPU.
Recent Fast Neutron Imaging Measurements with the Fieldable Nuclear Materials Identification System1 (2015)

This paper describes recent fast-neutron imaging measurements of the fieldable nuclear materials identification system (FNMIS) under development by Oak Ridge National Laboratory with National Nuclear Security Administration (NNSA-NA-22) support for possible future use in arms control and nonproliferation applications. This paper presents initial imaging measurements performed at Oak Ridge National Laboratory with a Thermo Fisher API 120 DT generator and the fast-neutron imaging module of the FNMIS. 1 This manuscript has been authored by Oak Ridge National Laboratory, managed by UT-Battelle LLC under contract no. DE-AC05-00OR22725 with the US Department of Energy. The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes.
Broadband FERMI antenna and its application to mm-wave imaging (2007)

Design method of broadband FERMI antenna having high gain, low side lobe level and almost the same E-plane and H-plane patterns is presented. Experimental results of passive millimeter-wave imaging through fire using FERMI antenna is also described. A method of broadband active imaging using squared detector is proposed, in which autocorrelation pulse response is employed to realize a low cost imaging system. Finally, experimental results of the active imaging are presented. (6 pages)
Electron Trapping in Higher Adduct Fullerene‐Based Solar Cells (2009)

Abstract Here, the performance of bulk‐heterojunction solar cells based on a series of bisadduct analogues of commonly used derivatives of C 60 and C 70 , such PCBMs and their thienyl versions, is investigated. Due to their higher lowest unoccupied molecular orbital an increase in open‐circuit voltage and thus performance is expected. It is shown that the occurrence of a multitude of different isomers results in a decrease in the electron transport for some of the materials. Surprisingly, the solar‐cell characteristics are very similar for all materials. This apparent discrepancy is explained by a significant amount of shallow trapping occurring in the fullerene phase that does not hamper the solar cell performance due the filling of these shallow traps during illumination. Furthermore, the trisadduct analogue of [60]PCBM has been investigated, which, despite an even further increase in open‐circuit voltage, results in a significantly reduced device performance due to a strong deterioration of the electron mobility in the fullerene phase.
Intrarenal vasoconstriction during hyperchloremia: role of thromboxane (1989)

The role of thromboxane (Tx) in chloride-induced renal vasoconstriction was studied in Munich-Wistar rats. Hyperchloremia (induced by changing an intra-aortic, super-renal infusion of 1.2 M Na acetate to 1.2 M NaCl) reduced the glomerular filtration rate (GFR) by 31 +/- 3% (P less than 0.001; n = 27), and the clearance of p-aminohippurate (CPAH) by 36 +/- 4% (P less than 0.01). The Tx synthetase antagonists (25 mg/kg) UK-38,485 or OKY-046 prevented these changes. Pretreatment with indomethacin (5 mg/kg) also prevented Cl-induced changes in GFR and CPAH and blunted (P less than 0.05) the Cl-induced increase in renal vascular resistance (RVR, vehicle +55 +/- 11%, n = 8, indomethacin +27 +/- 7%, n = 6). Hyperchloremia reduced the hydraulic pressures (mmHg) in the outer cortical efferent arteriolar star vessels (PEA, 23.9 +/- 1.6 vs. 17.9 +/- 0.9; P less than 0.01) and proximal tubules (PT, 21.1 +/- 1.5 vs. 15.8 +/- 1.4; P less than 0.01) but not in the glomerular capillaries (PGC, 47.0 +/- 2.5 vs. 49.5 +/- 2.2; NS). Therefore the hydraulic pressure drop across the glomerular capillaries (PGC - PT) increased (24.9 +/- 2.8 vs. 34.6 +/- 2.9; P less than 0.02). UK-38,485 prevented significant Cl-induced changes in these pressures. The calculated resistances of the afferent and efferent arterioles both increased during hyperchloremia (+56 +/- 19%; P less than 0.05 and +195 +/- 66%; P less than 0.01, respectively) but were blunted after UK-38,485 (+23 +/- 8 and +21 +/- 10%, respectively).(ABSTRACT TRUNCATED AT 250 WORDS)
Tribological Performance of Laser Patterned Cemented Tungsten Carbide Parts (2016)

Some tools for machining processes used to be guided by supporting parts while using them for cutting or abrasive machining. For instance, the guide stone is used as supporting part in the honing process, which maintains the concentricity of the rotating axis. The contact surfaces of the supporting parts should exhibit the following properties: adequate combination of hardness, toughness and wear resistance. The damage of contact surfaces can be caused by a combination of friction and adhesion, related to the weakness of surface conditions in the tribological system, e.g. asperities, debris and pores. In order to investigate the impact of the surface topography, contact surfaces of the supporting parts made of cemented tungsten carbide (WC-Co) have been treated by means of laser surface patterning (LSP). Two different surface patterns with deterministic geometries on the micro and nano scale are achieved by two distinct LSP methods: line-like patterns by Laser-Interference Metallurgy (LIMET) with ns-laser and dimples by ps-laser. Tangential force coefficients, similar to the coefficient of friction (COF) in the non-abrasive case, are measured to evaluate the impact of the surface patterns. In this paper, the LSP methods as well as the analysis of the resulting surface topography are introduced. It is found that higher friction is obtained by line-like patterns whereas dimples can efficiently reduce the friction. At low load, hydrodynamic effects are reinforced as the dimples work as lubricant reservoirs and trap wear particles, and the observation becomes less obvious at high load. Meanwhile, only slight friction augmentation is observed by line-like patterns when the load increases.
Tolerance Band Adaptation Method for Dynamic Operation of Grid-Connected Modular Multilevel Converters (2016)

The use of modular multilevel converters (MMC) in high-voltage direct current (HVdc) transmission systems has grown significantly in the past decade. The efficiency, cell capacitor voltage ripple, and dynamic performance are three contradictory aspects of the MMC which are related to the converter switching scheme. Previously introduced tolerance band (TB)-based schemes enable efficient and simple control for grid-connected MMCs. This paper addresses the dynamic operation of TB switching schemes by proposing a dynamic boundary setting technique for steady-state operation and a switching scheme scheduling controller for transient fault handling. The performance of proposed methods are validated in a realistic point-to-point HVdc link, modeled in real-time digital simulator where two converters with 512 cells per arm are implemented. Utilizing the proposed methods will enable efficient implementation of TB-based schemes for different operating points, and also a robust transient fault handling.
MicroRNA-based signatures impacting clinical course and biology of ovarian cancer: a miRNOmics study (2021)

Specific dysregulated microRNA sets in tumor tissue showed predictive/prognostic value in OC, and resulted in a promising biological signature for this disease.
Impact of somatic mutations on response to lenalidomide in lower-risk non-del(5q) myelodysplastic syndromes patients (2020)

Impact of somatic mutations on response to lenalidomide in lower-risk non-del(5q) myelodysplastic syndromes patients
A new high energy implantation based technology for power integrated circuit devices (2003)

In this work, a significant improvement of power integrated circuit technology has been obtained by the use of high energy implantation, thus eliminating a second epitaxial growth. The damage in implanted region has been recovered by rapid thermal annealing.
Computational microscopy for fast widefield deep-tissue fluorescence imaging using a commercial dual-cannula probe (2022)

A solid-glass cannula serves as a micro-endoscope that can deliver excitation light deep inside tissue while also collecting emitted fluorescence. Then, we utilize deep neural networks to reconstruct images from the collected intensity distributions. By using a commercially available dual-cannula probe, and training a separate deep neural network for each cannula, we effectively double the field of view compared to prior work. We demonstrated ex vivo imaging of fluorescent beads and brain slices and in vivo imaging from whole brains. We clearly resolved 4 μm beads, with FOV from each cannula of 0.2 mm (diameter), and produced images from a depth of ~1.2 mm in the whole brain, currently limited primarily by the labeling. Since no scanning is required, fast widefield fluorescence imaging limited primarily by the brightness of the fluorophores, collection efficiency of our system, and the frame rate of the camera becomes possible.