gebhart/patrepeval huggingface dataset:
Pregnancy-Onset Habitual Snoring, Gestational Hypertension, and Preeclampsia (2013)

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Three-dimensional Fluorescence Microscopy by Optical Scanning Holography (1997)

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 T-C. Poon, "Three-dimensional Fluorescence Microscopy by Optical Scanning Holography," Optics & Photonics News 8(12), 22_1-23 (1997) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
Correction: Interfacial acidity on the strontium titanate surface: a scaling paradigm and the role of the hydrogen bond (2021)

Correction for 'Interfacial acidity on the strontium titanate surface: a scaling paradigm and the role of the hydrogen bond' by Robert C. Chapleski, Jr. <i>et al.</i>, <i>Phys. Chem. Chem. Phys.</i>, 2021, <b>23</b>, 23478-23485, DOI: 10.1039/D1CP03587H.
Response to letter regarding “Developing a predictive model for spinal shock in dogs with spinal cord injury” (2023)

Thank you for the opportunity to address the points made by Dr Cummings on our recent paper reporting the development of a clinical predictive model for spinal shock. We thank the author for his thorough review of the literature related to clinical predictive models (CPMs) and agree with his assertion that CPMs must be externally validated before they can be widely deployed for prognostication in the clinical setting. This is a future direction for our group, and a limitation of the current data that we discuss in our manuscript. Dr Cummings suggests that provision of a simple tool such as a spinal shock calculator would allow others to quickly perform model calculations for their own patients. We would like to point out that, while we did consider this as part of our original work, we felt it would be inappropriate to provide a specific diagnostic tool at this time, given the risk of bias and lack of external validation Dr Cummings carefully points out in his letter. To address Dr Cummings' concern that dogs with missing data (figure 2) were excluded from the analysis rather than using multiple imputation to estimate missing data, it is relevant to consider that these dogs did not have the basic data in their records that was required to determine their eligibility for the study. This was not just a matter of a missing predictor. It was unclear whether they had either of the outcomes of interest (L4-S3 myelopathy or T3-L3 myelopathy with spinal shock) for prediction. Of the 457 dogs with complete data, only 72 had one of the relevant conditions, so for the 61 excluded dogs, if the data were missing at random, only 9 or 10 might have had one of the relevant conditions. Additionally, we were concerned that data might not be missing at random because dogs without the required imaging and examinations could have had conditions that did not require imaging for diagnosis (exclusion criterion). Given that this would both decrease the number of relevant cases excluded and violate the “missing at random” assumption of imputation algorithms, we determined that imputation of missing values would not be appropriate. It is correct that there is a small chance of bias introduced by this choice, but it should be less than what would have been introduced by using multiple imputation. Regarding Dr Cummings's mention of “training” (n = 64) and “test” (n = 8) data, we would like to clarify that there was no “test” data used in this investigation. We presented hypothetical dogs in Figure 3, Figure 4, and Table 5 to demonstrate clinically relevant examples of the model's prediction. We have found that equations and coefficients can be difficult for clinicians to interpret, so this was simply a different way of demonstrating the model. Apologies if it gave the impression of an attempt at external validation. It was not.
EFFECT OF FUNCTIONALIZATION OF GRAPHENE ON THERMAL CONDUCTIVITIES OF GRAPHENE-EPOXY COMPOSITES (2015)

The effect of functionalization on thermal conductivities of graphene embedded in epoxy and its composites is studied using molecular dynamics simulations.
Synthesis, immunological activity and computational study of 5-amino-3-methyl-4-isoxazolecarboxylic acid semicarbazides and thiosemicarbazides. (2009)

A series of 5-amino-3-methyl-4-isoxazolecarboxylic acid semicarbazides and thiosemicarbazides (M1-M9) were obtained by reacting 5-amino-3-methyl-4-isoxazolecarboxylic acid hydrazide with isocyanate and isothiocyanate. In order to determine structure-activity relationships for the series of nine compounds (M1-M9) geometry optimization was carried out using quantum-chemical DFT calculations at B3LYP/6-31g* level. The compounds, administered to mice at 1 microg or 10 microg doses, four hours prior to immunization with sheep erythrocytes (SRBC), significantly suppressed the primary, humoral immune response in mice as measured by the number of antibody-forming cells (AFC) in the spleens. Structure/activity relationships, regarding the studied compounds, were discussed.
Supplementary Methods, Figure Legend from Chimeric Antigen Receptor T Cells with Dissociated Signaling Domains Exhibit Focused Antitumor Activity with Reduced Potential for Toxicity <i>In Vivo</i> (2023)

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A Study of the Chemical and Biological Properties of an Unidentified Growth Factor in Distiller's Dried Solubles (1947)

Abstract not available
In vitro cardiac catheter navigation via augmented reality surgical guidance (2009)

Catheter-driven cardiac interventions have emerged in response to the need of reducing invasiveness associated with the traditional cut-and-sew techniques. Catheter manipulation is traditionally performed under real-time fluoroscopy imaging, resulting in an overall trade-off of procedure invasiveness for radiation exposure of both the patient and clinical staff. Our approach to reducing and potentially eliminating the use of flouroscopy in the operating room entails the use of multi-modality imaging and magnetic tracking technologies, wrapped together into an augmented reality environment for enhanced intra-procedure visualization and guidance. Here we performed an in vitro study in which a catheter was guided to specific targets located on the endocardial atrial surface of a beating heart phantom. "Therapy delivery" was modeled in the context of a blinded procedure, mimicking a beating heart, intracardiac intervention. The users navigated the tip of a magnetically tracked Freezor 5 CRYOCATH catheter to the specified targets. Procedure accuracy was determined as the distance between the tracked catheter tip and the tracked surgical target at the time of contact, and it was assessed under three different guidance modalities: endoscopic, augmented reality, and ultrasound image guidance. The overall RMS targeting accuracy achieved under augmented reality guidance averaged to 1.1 mm. This guidance modality shows significant improvements in both procedure accuracy and duration over ultrasound image guidance alone, while maintianing an overall targeting accuracy comparable to that achieved under endoscopic guidance.
X-ray Photoelectron Spectroscopy and Magnetic Studies on the Effect of Pore Size, Wall Thickness, and Wall Composition on Superparamagnetic Cobaltocene Mesoporous Nb, Ta, and Ti Composites (2000)

Recent results in our group demonstrated that mixed oxidation state mesoporous niobium oxide cobaltocene composites display superparamagnetism at certain composition ratios. This was the first report of superparamagnetism in nanoscale molecular ensembles. A series of mesoporous niobium oxide materials were synthesized in order to understand the role of pore size and thickness of the walls in the mesostructure on the magnetic properties. Mesoporous Ti oxide and Ta oxide composites were also synthesized in order to investigate the effect of changing the wall composition on the magnetic properties of this new series of materials. All samples were characterized by X-ray diffraction, nitrogen adsorption, ultraviolet spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and superconducting quantum interference device magnetometry. The results of this study showed that variation of wall thickness or pore size in the Nb system had little effect on the properties and that superparamagnetism most likely arises from mixed oxidation state cobaltocene grains residing in the individual pores and not from the free electrons in the mesostructure or much larger domains. The Langevin function was applied to the isothermal magnetic data from the Nb composites and gave mean superparamagnetic particle sizes of ca. 14 nm in each system. The Co(II) to Co(III) ratios in these materials were approximately 1:1. The Ti and Ta materials showed no sign of superparamagnetism and only very low levels of neutral cobaltocene in the pores. This suggests that a critical amount of cobaltocene is required to bring about superparamagnetic behavior.
Dual gene expression cassette vectors with antibiotic selection markers for engineering in Saccharomyces cerevisiae (2013)

These vectors allow manipulations in prototrophic yeast strains with expression of two gene cassettes per plasmid, and will be particularly useful for metabolic engineering applications. The vector set expands the (currently limited) selection of antibiotic marker plasmids available for use in yeast, and in addition makes available dual gene expression cassettes on individual plasmids using antibiotic selection. The resistance gene cassettes are flanked by loxP recognition sites to allow CreA-mediated marker removal and recycling, providing the potential for genomic integration of multiple genes. Guidelines for selection using G418 and phleomycin are provided.
Complexes of hydrazones with dichloro(η-ethylene)platinum(II): stereo-chemical and conformational analysis of the co-ordinated ligand (1976)

By reaction of the hydrazones (Me2C:N·NMePh. L1; MeHC:N·NMe2, L2; MeHC:N·NMePh. L3; EtHC:N·NMe2. L4; EtHC:N·NMePh. L5: and Me2C:N·NHPh, L6) with Zeise's salt, complexes of formula trans-[Pt(C2H4)Cl2-(hydrazone)] have been prepared in which the imino-nitrogen acts as donor atom. Of the hydrazones derived from aldehydes, which in the free state are present as pure syn isomers, L2 and L4 retain their configuration on co-ordination to the metal, while L3 and L5 give two isomeric complexes, in one of which the ligand keeps the syn configuration, whereas in the other isomerization to the anti form occurs (with respect to the C:N double bond). Evidence of rotational isomerism about the N·N bond has been found in the case of L6. The coupling of the ligand protons with the 195Pt nucleus has been measured and correlated with their relative cis or trans position about the C:N double bond. A coupling of ca. 74 and 27 Hz has been found for the aldehydic proton, trans and cis to platinum respectively. For the methyl substituents at the carbonylic carbon, a higher coupling constant (11–13 Hz) is observed when the methyl group is cis to platinum and a lower one (6–8 Hz) when it is trans. This result is discussed in connection with other literature data.
Genetic Modification of theSalmonellaMembrane Physical State Alters the Pattern of Heat Shock Response (2010)

It is now recognized that membranes are not simple physical barriers but represent a complex and dynamic environment that affects membrane protein structures and their functions. Recent data emphasize the role of membranes in sensing temperature changes, and it has been shown that the physical state of the plasma membrane influences the expression of a variety of genes such as heat shock genes. It has been widely shown that minor alterations in lipid membranes are critically involved in the conversion of signals from the environment to the transcriptional activation of heat shock genes. Previously, we have proposed that the composition, molecular arrangement, and physical state of lipid membranes and their organization have crucial roles in cellular responses during stress caused by physical and chemical factors as well as in pathological states. Here, we show that transformation of Salmonella enterica serovar Typhimurium LT2 (Salmonella Typhimurium) with a heterologous Delta(12)-desaturase (or with its trans-membrane regions) causes major changes in the pathogen's membrane dynamic. In addition, this pathogen is strongly impaired in the synthesis of major stress proteins (heat shock proteins) under heat shock. These data support the hypothesis that the perception of temperature in Salmonella is strictly controlled by membrane order and by a specific membrane lipid/protein ratio that ultimately causes transcriptional activation of heat shock genes. These results represent a previously unrecognized mode of sensing temperature variation used by this pathogen at the onset of infection.
Modeling Silicon on Insulator MOS Transistors with Nonrectangular-Gate Layouts (2006)

This work presents a new and simple approach for modeling silicon on insulator metal-oxide-semiconductor (MOS) dc characteristics for nonrectangular layout devices, based on decomposition of the original shape into trapezoidal parts and on an accurate but simple model of the trapezoidal layout transistor. Analytical expressions relating geometrical parameters and terminal current and voltages are presented for several shapes, such as L, U, T, and S, and other well-known devices such as the edgeless transistor and the asymmetric trapezoidal gate transistor. The proposed closed-form analytical expressions show good agreement with measured data and three-dimensional simulation results.
Automatic Control of Weld Penetration (1978)

Abstract : The objective of this project was to incorporate an infrared thermal probe with the previously developed weld penetration controller to improve penetration control of welds in 3/8 in.-thick ESR 4340 armor. The weld penetration control system works satisfactorily and reproducibly. The welding process used was gas tungsten arc.
Multilevel Non-Inverting Buck-Boost Converter with Low-Frequency Ripple-Shaping Based Controller for Operating in Step-down/Step-up Transition Region (2018)

This paper introduces a multilevel non-inverting buck-boost (ML-NIBB) converter and a complementary mixed-signal controller as an alternative to the conventional non-inverting buck-boost (NIBB) based switch-mode power supply (SMPS) solutions. This ML-NIBB is essentially a series connection of a 3-level flying capacitor (FC) buck converter and a 3-level FC boost converter with a shared inductor between the two stages. This new topology offers an advantage of increased power density compare to NIBB, through simultaneous reduction of the volume and improvements in power processing efficiency. The converter operates in 3-level buck mode or 3-level boost mode according to the input voltage. In addition, the multi-level ripple-shaping mode is introduced to provide a smooth transition between the two modes. The advantages of the new topology are experimentally verified, through a comparison with a conventional solution operating with a 1.8 V to 10 V input, 3.3 V to 10 V/30 W output experimental prototype. The introduced ML-NIBB based solution demonstrates higher efficiency among all three operating modes and up to 20% efficiency improvements in light load while using 2.2 times smaller inductor. Also, the effectiveness of extended version of the ripple-shaping controller is verified on the same prototype.
Selective private function evaluation with applications to private statistics (2001)

Motivated by the application of private statistical analysis of large databases, we consider the problem of selective private function evaluation (SPFE). In this problem, a client interacts with one or more servers holding copies of a database x = x1, … , xn in order to compute f(xi1, … , xim), for some function f and indices i = i1, … , im chosen by the client. Ideally, the client must learn nothing more about the database than f(xi, … , xim), and the servers should learn nothing.Generic solutions for this problem, based on standard techniques for secure function evaluation, incur communication complexity that is at least linear in n, making them prohibitive for large databases even when f in relatively simple and m is small. We present various approaches for constructing sublinear-communication SPFE protocols, both for the general problem and for special cases of interest. Our solutions not only offer sublinear communication complexity, but are also practical in many scenarios.
Organic Fluorophores Exhibiting Highly Efficient Photoluminescence in the Solid State (2010)

There has been extensive research on the development of organic optoelectronic devices, such as organic light-emitting diodes, organic field-effect transistors, and organic solid-state lasers from various viewpoints, ranging from basic studies to practical applications. As organic materials are used as solids in these devices, the importance of organic chromophores that exhibit intense emissions of visible light in the solid state is greatly increasing in the field of organic electronics. However, highly efficient emission from organic solids is very difficult to attain because most organic emitting materials strongly tend to cause concentration quenching of the luminescence in the condensed phase. Therefore, in order to generate and improve organic optoelectronic devices, it is necessary to design novel chromophores that exhibit superior solid-state emission performance. This Focus Review covers the recent development of highly emissive organic small molecules whose photoluminescence quantum yields in the solid state have been reported. Following the introduction, the photophysical processes of excited molecules are briefly reviewed. Subsequently, organic solid fluorophores are described with an emphasis on the characteristics of their molecular structures.
Low-noise amplification under the 3 dB noise figurein high-gain phase-sensitive fibre amplifier (1999)

A noise figure which is less than the standard quantum limit of 3 dB has been observed for the first time in a high gain phase-sensitive fibre parametric amplifier. A noise figure of 1.8 dB with a 16 dB signal gain was measured by a precisely calibrated electrical spectrum analyser.
Manometric Diagnosis of Lower Esophageal Sphincter Incompetence in Infants: Use of a Small, Single-Lumen Perfused Catheter (1978)

Lower esophageal sphincter (LES) pressure is frequently measured to diagnose LES incompetence in adults. The multilumen perfused catheters with large diameters that are used for ths purpose are not suitable for small infants. We measured LES pressure in ten normal newborns with a small, single-lumen perfused catheter and compared our values with those obtained with the standard adult apparatus. Higher pressures were recorded with the single-lumen catheter. Chloral hydrate sedation had no effect on LES pressure. Two-day-old infants had LES pressures comparable to those of adults and older children. The technique was applied to the diagnosis of LES incompetence in 23 infants. Infants with LES incompetence (chalasia) were correctly separated from infants with chronic vomiting secondary to all other causes. Single-lumen manometric studies provide a simple, reliable, and safe method of assessing LES incompetence in small infants.
The Effects of Spinal Fixation and Destabilization on the Biomechanical and Histologic Properties of Spinal Ligaments (1998)

Posterior spinal instrumentation and fusion led to decreased biomechanical properties of the ligamentum flavum, posterior longitudinal ligament, and interspinous and supraspinous ligaments. The stress-shielding effects were ligament dependent and were most pronounced on the posterior side. The altered biomechanical environment produced by spinal fixation, surgical intervention itself, or nonphysiologic mobilization can affect the ligamentous properties in vivo, possibly serving as the impetus for low back pain.
ChemInform Abstract: EFFECT OF HOMOVALENT FRAMEWORK CATION SUBSTITUTIONS ON THE SODIUM ION CONDUCTIVITY IN SODIUM ZIRCONIUM SILICON PHOSPHATE (NA3ZR2SI2PO12) (1982)

Abstract Da die Aktivierungsvolumina für den Na + ‐Transport im Ionenleiter Na 3 Zr 2 Si 2 PO 12 erstaunlich groß sind, wird versucht, die Größe der Diffusionskanäle durch partielle Substitution von As, Ge, Ti, Th und Hf für die Gitterkationen (Verringerung der strukturellen Hinderung des Diffusionsprozesses) zu ändern.
Isobutene Polymerization and Copolymerization with Isoprene Initiated by [Cp*TiMe2]+ in the Presence of a Novel Type of Weakly Coordinating Counteranion (2004)

Abstract Summary: The highly electrophilic borane B(C 6 F 5 ) 3 reacts with octadecanoic acid ( n ‐C 17 H 35 CO 2 H, stearic acid) to form 1:1 and 2:1 adducts [ n ‐C 17 H 35 CO 2 H][B(C 6 F 5 ) 3 ] and [ n ‐C 17 H 35 CO 2 H][B(C 6 F 5 ) 3 ] 2 . These adducts exhibit enhanced acidities, and react with Cp*TiMe 3 in methylene chloride and toluene to give methane and the complexes [Cp*TiMe 2 ][ n ‐C 17 H 35 CO 2 {B(C 6 F 5 ) 3 } 1,2 ]; the 2:1 complex in particular is a very good initiator for the carbocationic polymerization of isobutene (IB) and copolymerization of IB with isoprene at temperatures as high as −30 °C. High conversions to high molecular weight homo‐ and copolymers are obtained, consistent with the anion [ n ‐C 17 H 35 CO 2 {B(C 6 F 5 ) 3 } 2 ] − being very weakly coordinating. Novel class of Brønsted acidic initiators behave as very good initiators, e.g. in homopolymerisation of isobutene. magnified image Novel class of Brønsted acidic initiators behave as very good initiators, e.g. in homopolymerisation of isobutene.
Unzipping of black phosphorus to form zigzag-phosphorene nanobelts (2020)

Phosphorene, monolayer or few-layer black phosphorus, exhibits fascinating anisotropic properties and shows interesting semiconducting behavior. The synthesis of phosphorene nanosheets is still a hot topic, including the shaping of its two-dimensional structure into nanoribbons or nanobelts. Here we report electrochemical unzipping of single crystalline black phosphorus into zigzag-phosphorene nanobelts, as well as nanosheets and quantum dots, via an oxygen-driven mechanism. The experimental results agree well with our theoretical calculations. The calculation for the unzipping mechanism study suggests that interstitial oxygen-pairs are the critical intermediate species for generating zigzag-phosphorene nanobelts. Although phosphorene oxidation has been reported, lengthwise cutting is hitherto unreported. Our discovery of phosphorene cut upon oxidation represents a previously unknown mechanism for the formation of various dimensions of phosphorene nanostructures, especially zigzag-phosphorene nanobelts. It opens up a way for studying the quantum effects and electronic properties of zigzag-phosphorene nanobelts.