gebhart/patrepeval huggingface dataset:
Trends in Perovskite Solar Cells and Optoelectronics: Status of Research and Applications from the PSCO Conference (2017)

ADVERTISEMENT RETURN TO ISSUEPREVEnergy FocusNEXTTrends in Perovskite Solar Cells and Optoelectronics: Status of Research and Applications from the PSCO ConferenceFilippo De Angelis*†‡, Daniele Meggiolaro†‡, Edoardo Mosconi†‡, Annamaria Petrozza§, Mohammad Khaja Nazeeruddin∥, and Henry J. Snaith⊥View Author Information† Computational Laboratory for Hybrid/Organic Photovoltaics (CLHYO), CNR-ISTM, via Elce di Sotto 8, I-06123 Perugia, Italy‡ CompuNet, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy§ Center for Nano Science and Technology @Polimi, Istituto Italiano di Tecnologia, via Giovanni Pascoli 70/3, 20133 Milan, Italy∥ Group for Molecular Engineering of Functional Materials (GMF), Institute of Chemical Sciences and Engineering, Swiss Federal Institute of Technology, CH-1951 Sion, Switzerland⊥ Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, U.K.*E-mail: [email protected]Cite this: ACS Energy Lett. 2017, 2, 4, 857–861Publication Date (Web):March 17, 2017Publication History Received10 March 2017Accepted13 March 2017Published online17 March 2017Published inissue 14 April 2017https://pubs.acs.org/doi/10.1021/acsenergylett.7b00217https://doi.org/10.1021/acsenergylett.7b00217article-commentaryACS PublicationsCopyright © 2017 American Chemical Society. This publication is available under these Terms of Use. Request reuse permissions This publication is free to access through this site. Learn MoreArticle Views4247Altmetric-Citations24LEARN 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 PDF (5 MB) Get e-AlertscloseSUBJECTS:Electrical conductivity,Materials,Optoelectronics,Perovskites,Solar cells Get e-Alerts
Mechanisms for directed self-assembly of heteroepitaxial Ge/Si quantum\n dots with deterministic placement and sub-23nm spacing on SiC nanotemplates (2011)

Artificially ordered Ge quantum dot (QD) arrays, where confined carriers can\ninteract via exchange coupling, may create unique functionalities such as\ncluster qubits and spintronic bandgap systems. Development of such arrays for\nquantum computing requires fine control over QD size and spatial arrangement on\nthe sub-35 nm length scale. We employ fine-probe electron-beam irradiation to\nlocally decompose ambient hydrocarbons onto a bare Si (001) surface. These\ncarbonaceous patterns are annealed in UHV, forming ordered arrays of nanoscale\nSiC precipitates that serve as templates for subsequent Ge quantum dot\nself-assembly during heteroepitaxy. This templating approach has so far\nproduced interdot spacings down to 22.5 nm, and smaller spacings should be\npossible. We investigate the templated feature evolution during UHV processing\nto identify key mechanisms that must be controlled in order to preserve pattern\nfidelity and reduce broadening of the quantum dot size distribution. A key\nfinding is that the presence of a small background of excess carbon reduces Ge\nsurface diffusion, thereby suppressing coarsening to relatively high\ntemperatures. In fact, coarsening of the carbonaceous nanodot template prior to\nconversion to SiC can be a more important contributor to size dispersion, and\nmust be avoided through control of thermal budget.\n
Supplementary Table 4 from The miR-17/92 Polycistron Is Up-regulated in Sonic Hedgehog–Driven Medulloblastomas and Induced by N-myc in Sonic Hedgehog–Treated Cerebellar Neural Precursors (2023)

Supplementary Table 4 from The miR-17/92 Polycistron Is Up-regulated in Sonic Hedgehog–Driven Medulloblastomas and Induced by N-myc in Sonic Hedgehog–Treated Cerebellar Neural Precursors
Optimization in expression and purification of modified apoptin as selective anti-cancer therapy (2017)

Cancer is a disease caused by abnormal growth of tissue cells of the body that turn into cancer cells. Apoptin from Chicken Anemia Virus is known to have the ability to trigger apoptosis in cancer cells in vitro and in vivo, but not in normal cells. The production of Apoptin was done on Escherichia coli via plasmid pET9a and modified to improve the efficiency and ease of purification using IMAC nickel, by adding a few tags and cleavage site. The expected result is modified Apoptin and evidence of proteins expressed through SDS-PAGE analysis.
Pituitary gigantism (2015)

Knowledge of the molecular defects that underlie pituitary tumorigenesis is crucial for patient care as they guide early intervention, screening for associated conditions, genetic counseling, surgical approach, and choice of medical management. Recently described microduplications of Xq26.3 account for more than 80% of the cases of early-onset pediatric gigantism. Early recognition of X-LAG may improve outcomes, as successful control of growth hormone excess requires extensive anterior pituitary resection and are difficult to manage with medical therapy alone.
TWEAK/Fn14 Signaling Is Required for Liver Regeneration after Partial Hepatectomy in Mice (2014)

Background & Aims: Pro-inflammatory cytokines are important for liver regeneration after partial hepatectomy (PH). Expression of Fibroblast growth factor-inducible 14 (Fn14), the receptor for TNF-like weak inducer of apoptosis (TWEAK), is induced rapidly after PH and remains elevated throughout the period of peak hepatocyte replication. The role of Fn14 in post-PH liver regeneration is uncertain because Fn14 is expressed by liver progenitors and TWEAK-Fn14 interactions stimulate progenitor growth, but replication of mature hepatocytes is thought to drive liver regeneration after PH.
Ultrafast nano-imaging of far-from-equilibrium carrier and vibrational dynamics (Conference Presentation) (2022)

Ultrafast vibrational and electronic spectroscopy unravels the dynamics underlying the functionality of quantum, energy, and biological materials. To understand and ultimately control the processes that underly the emergent function in these materials requires imaging the elementary excitations on their natural time and length scales. To achieve this goal, we have developed scanning probe microscopy with ultrafast and shaped laser pulse excitation for multiscale spatio-temporal optical nano-imaging. However, mostly limited to short-lived transient states, the contrast obtained has remained insufficient to probe important weak and long-lived excitations such as low-conductivity carriers, molecular vibrations, lattice phonons, and their couplings. Here, we demonstrate ultrafast heterodyne pump-probe (HPP) nano-imaging to simultaneously resolve quantum dynamics in space, time, and frequency. In ultrafast infrared nano-imaging based on excitation modulation and sideband detection we isolate and selectively characterize excited-state electron and vibration dynamics from femto- do micro-second times scales. In exemplary applications I will show ultrafast movies to resolve the fundamental quantum dynamics from the few-femtosecond coherent to the thermal transport regime. Specifically, in quantum materials, in ultrafast nano-imaging of photoinduced carrier and phase behavior we identify distinct transient nano-domain behavior revealing competing electronic and lattice degrees of freedom. Further in lead halide perovskites from transient vibrational nano-FTIR imaging we resolve excited state polaron dynamics and polaron-cation coupling underlying their photovoltaic response. Lastly, by simultaneous probing of carrier dynamics and interfacial phonon softening we establish nano-thermometry to imagine interfacial thermal transport dynamics in 2D semiconductor/insulator heterostructures. These examples show how HPP nano-imaging opens the door to elementary processes and interactions in functional materials with full spatio-temporal-spectral resolution.
900-MHz multipath propagation measurements for US digital cellular radiotelephone (1990)

The results of multipath power delay profile measurements of 900-MHz mobile radio channels in Washington, DC, Greenbelt, MD, Oakland, CA, and San Francisco, CA, are presented. The measurements have focused on acquiring worst-case profiles for typical operating locations. The data reveal that at over 98% of the measured locations, root mean square (RMS) delay spreads are less than 12 mu s. Urban areas typically have RMS delay spreads on the order of 2-3 mu s and continuous multipath power out to excess delays of 5 mu s. In hilly residential areas and in open areas within a city, RMS delay spreads are slightly larger, typically having values of 5-7 mu s. In very rare instances, reflections from city skylines and mountains can cause RMS delay spreads in excess of 20 mu s. The worst-case profiles show resolvable diffuse multipath components at excess delays of 100 mu s and amplitudes 18 dB below that of the first arriving signal.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>
Doppler-derived trigger signals for high-frame-rate mouse cardiovascular imaging (2009)

The availability of an electrocardiogram (ECG) waveform in the adult mouse has permitted the measurement of fast, dynamic cardiac events where data acquisition is synchronized to the R-wave of the ECG waveform. These methods can easily attain one thousand frames/s at ultrasound frequencies greater than 20 MHz. With the heart being the first organ to develop, normal cardiovascular function is crucial to the viability of the developing embryo. Thus, translating such methodologies to analyze embryonic cardiovascular development would add crucial information in mouse models of congenital heart disease which are embryonic lethal. Obtaining an ECG signal from mouse embryos is impractical. Therefore, in this study, preliminary results are presented which derive a cardiac-trigger signal from Doppler blood-flow waveforms. A continuous wave 40 MHz Doppler ultrasound system was used to acquire the Doppler waveforms and a real-time algorithm was developed to process the Doppler waveforms and generate a trigger. Validation studies revealed that a heart rate can be reliably measured and that the Doppler trigger algorithm was robust enough to follow changes in the blood flow. Preliminary data showed that Doppler-derived triggers can be used for highframe-rate prospective imaging of the early embryonic mouse heart.
Poly-Si/AlN/HfSiO Stack for Ideal Threshold Voltage and Mobility in Sub-100 nm MOSFETs (2006)

A scalable poly-Si/AlN/HfSiO gate stack, implementing a new aluminum nitride (AlN) cap layer, combined with oxygen diffusion barrier, halo and counter doping engineering, high temperature spike anneal for gate and junction activation, and optional inverted gate implant, has been successfully developed to fully offset the large threshold voltage (V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">t</sub> ) shifts in poly-Si/HfSiO devices and achieve good thickness scalability and gate stack stability. The new AlN cap layers provide better PFET V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">t</sub> control than, for example, Al <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> layers, and can be removed from NFETs without impacting device properties. We thus have achieved sub-100 nm device V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">t</sub> of 0.3-0.4 V with PFETs I <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">on</sub> ~ 140 μA/μm at I <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">off</sub> ~13 pA/μm, suitable for low-power technologies. Carrier mobilities are close to those of SiON control devices. Thus the V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">t</sub> problem impeding the implementation of poly-Si/high-k gate stacks for low power device applications has been resolved
Influence of fly ash type on mechanical properties and self-healing behavior of Engineered Cementitious Composite (ECC) (2016)

This paper aims to clarify the influence of different types of fly ash on the mechanical properties and self-healing behavior of Engineered Cementitious Composite (ECC). Five types of fly ash with different chemical and physical properties were used in ECC mixtures. The fly ash to cement ratio was fixed at 3.0. The compressive and uniaxial tensile tests were conducted to evaluate the influence of fly ash type on mechanical properties. The permeability test was used to assess self-healing behavior of ECCs with different types of fly ash. The microtopography and chemical characteristics of the self-healing products in the crack were observed and examined by scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDS). The fly ash with relatively higher calcium content and smaller particle size was found conducive to a higher compressive strength. The lower combined Al2O3 and CaO content of this fly ash, however, was found to enhance the tensile strain capacity. Furthermore, high calcium fly ash accelerates the self-healing process of ECC for the same pre-damaged level. The self-healing product was a mixed CaCO3/C-S-H system with the CaCO3 as the main ingredient.
Photonic Metamaterials: Introduction (2007)

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text Evgenii E. Narimanov, Vladimir M. Shalaev, and Azriel Z. Genack, "Photonic Metamaterials: Introduction," J. Opt. Soc. Am. A 24, PM1-PM2 (2007) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
Faster exact algorithms for steiner trees in planar networks (1990)

Abstract We improve the time and space complexities of dynamic programming algorithms that compute optimal Steiner trees spanning nodes in planar networks. Our algorithms have special application to the rectilinear Steiner problem.
Genome-scale network analysis of imprinted human metabolic genes (2009)

System analysis of metabolic network reconstructions can be used to calculate functional states or phenotypes. This provides tools to study the metabolic effects of genetic and epigenetic properties, such as dosage sensitivity. We used the genome-scale reconstruction of human metabolism (Recon 1) to analyze the effect of nine known or predicted imprinted genes on metabolic phenotypes. Simulations of maternal deletion of ATP10A indicated an anabolic metabolism consistent with the known clinical phenotypes of obesity. The abnormal expression of the other genes affected fewer subsections of metabolism consistent with a lack of established clinical phenotypes. We found that four of nine genes had metabolic effect as predicted by the Haig's parental conflict theory.
Vibroacoustic model validation for a curved honeycomb composite panel (2001)

Finite element and boundary element models are developed to investigate the vibroacoustic response of a curved honeycomb composite sidewall panel. Results from vibroacoustic tests conducted in the NASA Langley Structural Acoustic Loads and Transmission facility are used to validate the numerical predictions. The sidewall panel is constructed from a flexible honeycomb core sandwiched between carbon fiber reinforced composite laminate face sheets. This type of construction is being used in the development of an all-composite aircraft fuselage. In contrast to conventional rib-stiffened aircraft fuselage structures, the composite panel has nominally uniform thickness resulting in a uniform distribution of mass and stiffness. Due to differences in the mass and stiffness distribution, the noise transmission mechanisms for the composite panel are expected to be substantially different from those of a conventional rib-stiffened structure. The development of accurate vibroacoustic models will aide in the understanding of the dominant noise transmission mechanisms and enable optimization studies to be performed that will determine the most beneficial noise control treatments. Finite element and boundary element models of the sidewall panel are described. Vibroacoustic response predictions are presented for forced vibration input and the results are compared with experimental data.
Versatile Synthesis of Functional Biodegradable Polymers by Combining Ring-Opening Polymerization and Postpolymerization Modification via Michael-Type Addition Reaction (2009)

Various functional biodegradable polymers were readily prepared based on novel cyclic carbonate monomers, acryloyl carbonate (AC) and methacryloyl carbonate (MAC), by combining ring-opening polymerization (ROP) and Michael-type conjugate addition. AC and MAC monomers were synthesized in four straightforward steps from 1,1,1-tris(hydroxymethyl)ethane with good overall yields (ca. 40%). AC and MAC were able to copolymerize with ε-caprolactone (ε-CL) and d,l-lactide (LA) in toluene at 110 °C using stannous octoate as a catalyst, yielding biodegradable copolymers with controlled (meth)acryloyl functional groups and molecular weights. The acryloyl groups were amenable to the Michael-type conjugate addition with varying thiol-containing molecules such as 2-mercaptoethanol, 3-mercaptopropanoic acid, cysteamine, cysteine, and arginine-glycine-aspartic acid-cysteine (RGDC) peptide under mild conditions, to provide biodegradable materials with vastly different functionalities (e.g., hydroxyl, carboxyl, amine, amino acid, and peptides) and properties (e.g., hydrophilicity, cell adhesion). Notably, 100% functionalization was achieved with 2-mercaptoethanol, cysteamine and cysteine. Initial cell culture studies demonstrated enhanced cell adhesion and growth on films containing functional RGDC peptides as compared to those of the parent copolymer. Therefore, combination of ROP and Michael-type conjugate addition provides a versatile access to diverse types of functional biodegradable materials.
Strong Coupling between Dark Plasmon and Anapole Modes (2019)

Plasmonic nanocavities enable extreme light-matter interaction by pushing light down to the nanoscale. The dipolar feature of bright modes allows coupling with the external excitation from free space but results in a radiating background, whereas nonradiating dark plasmon modes can hardly be excited. Here, we report for the first time on strong coupling between dark plasmon and anapole modes in a hybrid metal-dielectric nanostructure. With the aid of vanishing dipole characteristics of the anapole and dark plasmons, the hybrid modes exhibit minimum far-field scattering and maximum near-field enhancement. The dark mode coupling in the metal-dielectric nanostructure offers a nonradiating air cavity with greatly improved field enhancement in a broadened band, thus providing a background-free experimental platform for spectroscopic applications. The proposed approach to dark plasmon excitation, i.e., via anapole, may boost practical exploitation of dark plasmons by allowing linearly polarized light illumination and scalable arrays of individual nanostructure units.
Technical Indicators to Evaluate the Degree of Large Clot Formation Inside the Membrane Fiber Bundle of an Oxygenator in an In Vitro Setup (2018)

The most common technical complication during ECMO is clot formation. A large clot inside a membrane oxygenator reduces effective membrane surface area and therefore gas transfer capabilities, and restricts blood flow through the device, resulting in an increased membrane oxygenator pressure drop (dpMO). The reasons for thrombotic events are manifold and highly patient specific. Thrombus formation inside the oxygenator during ECMO is usually unpredictable and remains an unsolved problem. Clot sizes and positions are well documented in literature for the Maquet Quadrox-i Adult oxygenator based on CT data extracted from devices after patient treatment. Based on this data, the present study was designed to investigate the effects of large clots on purely technical parameters, for example, dpMO and gas transfer. Therefore, medical grade silicone was injected into the fiber bundle of the devices to replicate large clot positions and sizes. A total of six devices were tested in vitro with silicone clot volumes of 0, 30, 40, 50, 65, and 85 mL in accordance with ISO 7199. Gas transfer was measured by sampling blood pre and post device, as well as by sampling the exhaust gas at the devices' outlet at blood flow rates of 0.5, 2.5, and 5.0 L/min. Pre and post device pressure was monitored to calculate the dpMO at the different blood flow rates. The dpMO was found to be a reliable parameter to indicate a large clot only in already advanced "clotting stages." The CO<sub>2</sub> concentration in the exhaust gas, however, was found to be sensitive to even small clot sizes and at low blood flows. Exhaust gas CO<sub>2</sub> concentration can be monitored continuously and without any risks for the patient during ECMO therapy to provide additional information on the endurance of the oxygenator. This may help detect a clot formation and growth inside a membrane oxygenator during ECMO even if the increase in dpMO remains moderate.
Computational imaging reveals shape differences between normal and malignant prostates on MRI (2017)

We seek to characterize differences in the shape of the prostate and the central gland (combined central and transitional zones) between men with biopsy confirmed prostate cancer and men who were identified as not having prostate cancer either on account of a negative biopsy or had pelvic imaging done for a non-prostate malignancy. T2w MRI from 70 men were acquired at three institutions. The cancer positive group (PCa+) comprised 35 biopsy positive (Bx+) subjects from three institutions (Gleason scores: 6-9, Stage: T1-T3). The negative group (PCa-) combined 24 biopsy negative (Bx-) from two institutions and 11 subjects diagnosed with rectal cancer but with no clinical or MRI indications of prostate cancer (Cl-). The boundaries of the prostate and central gland were delineated on T2w MRI by two expert raters and were used to construct statistical shape atlases for the PCa+, Bx- and Cl- prostates. An atlas comparison was performed via per-voxel statistical tests to localize shape differences (significance assessed at p < 0.05). The atlas comparison revealed central gland hypertrophy in the Bx- subpopulation, resulting in significant volume and posterior side shape differences relative to PCa+ group. Significant differences in the corresponding prostate shapes were noted at the apex when comparing the Cl- and PCa+ prostates.