gebhart/patrepeval huggingface dataset:
Vibrational frequencies associated with the carbide ligand in iron butterfly clusters (1987)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVibrational frequencies associated with the carbide ligand in iron butterfly clustersP. L. Stanghellini, M. J. Sailor, P. Kuznesof, K. H. Whitmire, J. A. Hriljac, J. W. Kolis, Y. Zheng, and D. F. ShriverCite this: Inorg. Chem. 1987, 26, 18, 2950–2954Publication Date (Print):September 1, 1987Publication History Published online1 May 2002Published inissue 1 September 1987https://pubs.acs.org/doi/10.1021/ic00265a007https://doi.org/10.1021/ic00265a007research-articleACS PublicationsRequest reuse permissionsArticle Views266Altmetric-Citations20LEARN 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 Get e-Alerts
Supplementary Figure 3 from <i>In Vivo</i> Detection of HSP90 Identifies Breast Cancers with Aggressive Behavior (2023)

&lt;p&gt;NIR Imaging of Intraductally and Subcutaneously Implanted 4T1 cells&lt;/p&gt;
Ultracompact monolithic broadband in-line micro interferometric sensor based on multi-beam interference (2011)

We demonstrate broadband micro interferometric sensor based on multi-beam interference using a singlemode fiber end-spliced with an end-sphered hollow-core fiber lens. The length of sensor head is less than 240μm and displacement resolution is 0.8nm.
Dynamic Autoencoders Against Adversarial Attacks (2023)

Neural Networks are the target of numerous adversarial attacks. In those, the adversary perturbs a model's input with a noise that is small, but large enough to fool the model. In this article, we propose to dynamically add autoencoders from a pretrained set to a base model as a countermeasure to such attacks. This doing, we modify the underlying labels regions of the model to be protected, letting the adversary unable to craft relevant adversarial perturbations. Our experiments confirm the efficiency of our protection when the pretrained set has enough elements.
Low-cost square cross section helical antennas (2000)

Square and other cross section helical antennas have several advantages over the conventional circular cross section helical antennas used in satellite communication and other applications. The linear segments which make up a. square cross section helical antenna can be easily supported on a structure which can be cheaply designed and manufactured even for variable cross section or pitch helical antennas. This structure has the additional advantage of having minimal conductor-dielectric proximity, thus virtually eliminating unwanted frequency shift and loss due to dielectric loading. The linear elements are also well suited to simulation using the method of moments, in which cylindrical conductors are nearly always standard elements. Other polygonal cross sections allow some improvement in the axial ratio performance of the helical antennas. The theory and history of helical antennas is discussed, and axial-mode helical antenna models designed to illustrate the relative performance of circular and square helical antennas are presented. Simulations of these models and others with other cross sections were performed using WIPL, a method-of-moments simulation software package, and these simulation results are discussed. Circular and square helical antennas were constructed and measured, and the effects of dielectric loading immediately within the helical winding measured. These simulation and measurement results illustrate the performance advantages of square and other non-circular cross sections for helical antennas.
Impact of Boundary Conditions on the Reconstructed Flame Transfer Function for Gas Turbine Combustion Systems (2008)

In order to achieve low levels of pollutants modern gas turbine combustion systems operate in lean and premixed modes. However, under these conditions self-excited combustion oscillations due to a complex feedback mechanism between pressure and heat release fluctuations can be found. These instabilities may lead to uncontrolled high pressure amplitude oscillations which can damage the whole combustor. The flame induced acoustic source terms are still analytically not well described and are a major topic of thermo-acoustic investigations. For the analysis of thermo-acoustic phenomena in gas turbine combustion systems flame transfer functions can be utilized. The purpose of this paper is to introduce and to investigate modeling parameters, which could influence a novel computational approach to reconstruct flame transfer functions known as the CFD/SI method. The flame transfer function estimation is made by application of a system identification method based on Wiener-Hopf formulation. Varying acoustic boundary conditions, combustion models and time resolutions may strongly affect the reconstructed flame response characterizing overall system dynamics. The CFD/SI approach has been applied to a generic gas turbine burner to derive a flame response. 3D unsteady simulations excited with white noise have been performed and the reconstructed flame transfer functions have been validated with experimental data. Moreover, the impact on the reconstructed flame transfer functions because of different boundary condition configurations has been examined.
Preliminary Investigation of Multiplexed Pinholes with Circular Apertures and Elliptical Ports for I-123 DAT Imaging (2017)

Earlier, we proposed an inexpensive method to improve the performance of the conventional dual-head SPECT systems for I-123 dopamine transporter (DAT) imaging of Parkinson Disease. In this approach, the collimator on one head is replaced with a multi-pinhole (MPH) collimator while retaining the conventional collimator on the other head, thus enabling combined MPH/Parallelbeam (or Fanbeam) acquisition. The original MPH design consisted of 9 apertures with rectangular entrance/exit ports covering a cylindrical volume of interest (VOI) around the striatum with minimal multiplexing. Our main goal in this work is to increase the sensitivity of this system by adding more pinholes and allowing multiplexing. For a more efficient usage of the available detector coverage, we also proposed the usage of pinholes with circular apertures and elliptical ports referred to as “lofthole” herein. Circular apertures are desired because of the uniform spatial resolution, more accurate point spread function modeling and fabrication while the elliptical ports provide more flexibility in the detector coverage compared to circular ports. In this preliminary work, we present a comparison of 9, 13, 17 and 16 pinhole configurations for conic-holes (circle bases) and loftholes (circular and elliptic bases) through projections obtained from GATE Monte Carlo software.
Unraveling the Correlations between Conformation, Lubrication, and Chemical Stability of Bottlebrush Polymers at Interfaces (2017)

In the present study, we monitored the conformation and chemical stability of a hydrophilic bottlebrush (BB) polymer in pure water and buffered saline solutions. We correlated these parameters to lubricating and wear protecting properties. Using the surface forces apparatus (SFA), we show that the BB polymer partially adsorbs on mica surfaces and extends half its contour length toward the aqueous media. This conformation gives rise to a strong repulsive interaction force when surfaces bearing BB polymer chains are pressed against each other. Analysis of these repulsive forces demonstrated that the adsorbed polymer chains could be described as end-attached elastic rods. After 2 months of aging at temperatures ranging from 4 to 37 °C, partial scission of the BB polymer's lateral chains was observed by gel permeation chromatography with a half-life time of the polymer of at least two years. The thickness of the BB polymer layer assessed by SFA appeared to quickly decrease with aging time and temperature, which was mainly caused by the adsorption to the substrate of the released lateral chains. The gradual loss of the BB polymer lateral chains did not significantly impact the tribological properties of the BB polymer solution nor its wear protection capacity. The friction coefficient between mica surfaces immersed in the BB polymer solution was μ = 0.031 ± 0.002, was independent of the aging conditions, and remained constant up to an applied pressure P = 0.2 to 0.25 MPa. Altogether, this study demonstrates that, besides the gradual loss of lateral chains, the BB polymer is still able to perform adequately as a lubricant and wear protecting agent over a time period suitable for in vivo administration.
Response to Comment on "Radiative Absorption Enhancements Due to the Mixing State of Atmospheric Black Carbon" (2013)

Jacobson argues that our statement that "many climate models may overestimate warming by BC" has not been demonstrated. Jacobson challenges our results on the basis that we have misinterpreted some model results, omitted optical focusing under high relative humidity conditions and by involatile components, and because our measurements consist of only two locations over short atmospheric time periods. We address each of these arguments, acknowledging important issues and clarifying some misconceptions, and stand by our observations. We acknowledge that Jacobson identified one detail in our experimental technique that places an additional constraint on the interpretation of our observations and reduces somewhat the potential consequences of the stated implications.
High-spin yrast structure of159Ho (2011)

An investigation of the yrast structure of the odd-$Z$ ${}^{159}$Ho nucleus to high spin has been performed. The ${}^{159}$Ho nucleus was populated by the reaction ${}^{116}$Cd(${}^{48}$Ca,$p4n\ensuremath{\gamma}$) at a beam energy of 215 MeV, and resulting $\ensuremath{\gamma}$ decays were detected by the Gammasphere spectrometer. The ${h}_{11/2}$ yrast band has been significantly extended up to ${I}^{\ensuremath{\pi}}=75/{2}^{\ensuremath{-}}$ (tentatively $79/{2}^{\ensuremath{-}}$). A lower frequency limit for the second ${({h}_{11/2})}^{2}$ proton alignment was extracted consistent with the systematics of this alignment frequency, indicating an increased deformation with neutron number in the Ho isotopes. The energy-level splitting between the signature partners in the ${h}_{11/2}$ structures of the Ho isotopes and the neighboring $N=92$ isotones is discussed.
Sober view on extreme ultraviolet lithography (2006)

EUV lithography has been widely regarded as the lithography technology to succeed optical lithography since the 100-nm era. With the ending of 193-nm immersion lithography in sight, the need for a successor cannot be more urgent. We deal quantitatively with various critical aspects of EUV lithography such as source and power requirement, mask specification, random phase shifting, oblique incidence, reflective projection optics, and resist, to compile a list of the critical issues and to determine the most critical ones to make the technology a success.
Electrolyte-Controlled Redox Conductivity and n-Type Doping in Poly(bis-EDOT-pyridine)s (2004)

We report the use of electrolyte variations as a means to actively control redox and n-type doping processes in π-conjugated electroactive polyheterocycles. Specifically, a series of donor−acceptor bis-EDOT-pyridine polymers, poly[2,5-bis-(2,3-dihydro-thieno[3,4-b][1,4]dioxin-5-yl)-pyridine] (PBEDOT-Pyr) and poly[5,8-bis(3-dihydro-thieno[3,4-b][1,4]dioxin-5-yl)-2,3-diphenyl-pyrido[3,4-b]pyrazine (PBEDOT-PyrPyr(Ph)2), have been investigated. The use of soft, bulky cations, such as n-alkylammonium, allows true n-type doping to be observed in cyclic voltammetry, differential-pulse voltammetry, and in situ conductance experiments. Color changes are also observed upon conversion of the polymers from their neutral to reduced states. Hard, electrophilic cations, such as lithium and sodium, induce minimal current and conductivity responses for these polymeric systems. This “pinning” of the cation−anion pair causes a decrease in the electrochemical and conductivity response. Optical changes upon reduction are observed that are distinct from the n-alkylammonium salts, indicating the lack of charge carrier formation and illustrating that reductive processes are not indicative of true doping in simple electrochemical experiments.
Neurologic Emergencies in the Intensive Care Unit Setting (2006)

Central nervous system (CNS) symptoms frequently arise in patients in an inten-sive care unit (ICU) setting. Many of these patients are eventually diagnosed withencephalopathy resulting from delirium, traumatic brain injury, CNS infection,CNS tumor, hepatic failure, uremia, and intoxications (1,2). For the most part,these are systemic illnesses that have neurologic manifestations. The approachto these neurologic problems is to treat the underlying systemic disease. In thischapter, we will focus on the clinical presentation, diagnostic work up, and treat-ment of the more common neurologic problems arising in the ICU that arisefrom disorders that primarily affect the CNS: ischemic stroke, hypoxic-ischemicinjury, seizures, status epilepticus, and brain death.
Opportunistic Spectrum Reuse for Femtocell Networks (2011)

Femtocell networks are inherently interference- limited similar to other cellular networks. However, massive and unplanned roll-outs of femtocells make the classical macro cells more susceptible to the resulting interference. In this paper a novel distributed approach is proposed for resource allocation for femtocells that opportunistically identifies low-cost resources (in terms of interference) in a way that would cause minimal impact on the service level of primary macro users. Simulation study confirms the efficiency of proposed algorithm compared to benchmarking scenario of macro-only network operation. As it is shown, the proposed method enables flexible tuning of femto throughput at the cost of macro users service.
Duplexing, resource allocation and inter-cell coordination: design recommendations for next generation wireless systems: Research Articles (2005)

Coexistence of different access technologies, hierarchical cellular deployment, a wide variety of data services, requirements for transparent operation across different technologies, adaptivity to varying network conditions and mobility and quality of service (QoS) constraints introduce a number of challenges in the design of future generation systems and the specification of new air interfaces, such as efficiency and flexibility in the utilization of spectrum, dynamic resource allocation and exploitation of the multiuser diversity and reconfigurable interference management and inter-cell coordination. In this paper, three critical issues for the design of next generation systems are addressed: (i) duplexing, (ii) scheduling and resource allocation and (iii) interference and inter-cell coordination. A number of research directions are presented, which constitute promising potential candidates for next generation systems specification. Copyright © 2005 John Wiley & Sons, Ltd.
Synthesis of couple-mode optical filter (2003)

Summary from only given. We review the mathematical basis of couple mode optical filter analysis and design, show that essentially the same couple-mode formalism may be used to analyze both birefringent (codirectional coupling) and thin film (contradirectional coupling) filters. The responses of the rejected and transmitted components of birefringent filter or the responses of the forward and backward components of thin film filter can be derived using their transfer-matrix as z-polynomials.
Gene amplifications associated with the development of hormone-resistant prostate cancer. (2003)

Hormone resistance remains a significant clinical problem in prostate cancer with few therapeutic options. Research into mechanisms of hormone resistance is essential.We analyzed 38 paired (prehormone/posthormone resistance) prostate cancer samples using the Vysis GenoSensor. Archival microdissected tumor DNA was extracted, amplified, labeled, and hybridized to Amplionc I DNA microarrays containing 57 oncogenes.Genetic instability increased during progression from hormone-sensitive to hormone-resistant cancer (P = 0.008). Amplification frequencies of 15 genes (TERC, MYBL3, HRAS, PI3KCA, JUNB, LAMC2, RAF1, MYC, GARP, SAS, FGFR1, PGY1, MYCL1, MYB, FGR) increased by >10% during hormone escape. Receptor tyrosine kinases were amplified in 73% of cases; this was unrelated to development of hormone resistance. However, downstream receptor tyrosine kinase signaling pathways showed increased amplification rates in resistant tumors for the mitogen-activated protein kinase (FGR/Src-2, HRAS, and RAF1; P = 0.005) and phosphatidylinositol 3'-kinase pathways (FGR/Src-2, PI3K, and Akt; P = 0.046). Transcription factors regulated by these pathways were also more frequently amplified after escape (MYC family: 21% before versus 63% after, P = 0.027; MYB family: 26% before versus 53% after, P = 0.18).Development of clinical hormone escape is linked to phosphatidylinositol 3'-kinase and mitogen-activated protein kinase pathways. These pathways may function independently of the androgen receptor or via androgen receptor activation by phosphorylation, providing novel therapeutic targets.
Path Thresholding: Asymptotically Tuning-Free High-Dimensional Sparse Regression (2014)

In this paper, we address the challenging problem of selecting tuning parameters for high-dimensional sparse regression. We propose a simple and computationally efficient method, called path thresholding (PaTh), that transforms any tuning parameter-dependent sparse regression algorithm into an asymptotically tuning-free sparse regression algorithm. More specifically, we prove that, as the problem size becomes large (in the number of variables and in the number of observations), PaTh performs accurate sparse regression, under appropriate conditions, without specifying a tuning parameter. In finite-dimensional settings, we demonstrate that PaTh can alleviate the computational burden of model selection algorithms by significantly reducing the search space of tuning parameters.
Finite size effects: deuterium diffusion in nm thick vanadium layers (2017)

We investigate the effect of finite size on the chemical diffusion of deuterium in extremely thin V(001) layers. A five fold increase in the diffusion coefficient is observed at concentrations around 0.2 [D/V], when the thickness of the V is decreased from 28 to 14 atomic layers (approximate to 2.1-4.2 nm). The size dependent deuterium-deuterium interaction energy is argued to be the root of the observed changes as the diffusion rates are similar at low concentrations. The results demonstrate the feasibility of using finite-size effects to enhance the chemical diffusion of light interstitials in solids. We discuss the general applicability of these effects to other systems.
In vivo photoacoustic tomography of total blood flow and Doppler angle (2012)

As two hallmarks of cancer, angiogenesis and hypermetabolism are closely related to increased blood flow. Volumetric blood flow measurement is important to understanding the tumor microenvironment and developing new means to treat cancer. Current photoacoustic blood flow estimation methods focus on either the axial or transverse component of the flow vector. Here, we propose a method to compute the total flow speed and Doppler angle by combining the axial and transverse flow measurements. Both the components are measured in M-mode. Collating the A-lines side by side yields a 2D matrix. The columns are Hilbert transformed to compare the phases for the computation of the axial flow. The rows are Fourier transformed to quantify the bandwidth for the computation of the transverse flow. From the axial and transverse flow components, the total flow speed and Doppler angle can be derived. The method has been verified by flowing bovine blood in a plastic tube at various speeds from 0 to 7.5 mm/s and at Doppler angles from 30 to 330&deg;. The measurement error for total flow speed was experimentally determined to be less than 0.3 mm/s; for the Doppler angle, it was less than 15&deg;. In addition, the method was tested in vivo on a mouse ear. The advantage of this method is simplicity: No system modification or additional data acquisition is required to use our existing system. We believe that the proposed method has the potential to be used for cancer angiogenesis and hypermetabolism imaging.
Diagnostic accuracy of a serotype-specific antigen test in community-acquired pneumonia (2013)

Our aim was to evaluate the diagnostic accuracy and clinical utility of a serotype-specific urinary antigen detection multiplex assay for identification of 13 pneumococcal serotypes (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F and 23F) in urine of patients with community-acquired pneumonia. Adult patients with clinical suspicion of community-acquired pneumonia were included. In addition to standard diagnostic procedures, a urine sample was collected to perform the urinary antigen detection test. Demographic, clinical, radiological and microbiological data were collected. Among 1095 community-acquired pneumonia patients Streptococcus pneumoniae was identified as causative pathogen in 257 (23%), when using conventional diagnostic methods and in 357 (33%) when urinary antigen detection was added. Of the 49 bacteraemic episodes caused by one of the 13 serotypes covered by the urinary antigen detection, 48 were detected by the urinary antigen detection, indicating a sensitivity of 98%. Of the 77 community-acquired pneumonia episodes with a "non-urinary antigen detection" causative pathogen, none had a positive urinary antigen detection result, indicating a specificity of 100%. Addition of the urinary antigen detection test to conventional diagnostic methods increased the prevalence of S. pneumoniae community-acquired pneumonia by 39%. Using bacteraemic episodes as reference sensitivity and specificity of the urinary antigen detection was 98% and 100%, respectively.