gebhart/patrepeval huggingface dataset:
The Impact of Instant Messaging Tools on Knowledge Management and Team Performance (2011)

Instant messaging (IM) has become increasingly popular as a form of social communication. However, the adoption of IM in the workplace remains controversial due to the challenges associated with quantifying organizational benefits. In this study, we evaluate the effects of using IM tools on facilitating knowledge transfer and knowledge generation at work, and their subsequent influence on work performance. The proposed model is validated by a survey of work professionals at a small company with the support of a social networking diagram. Implications and conclusions are discussed.
Progress toward understanding the contribution of alkali generation in dental biofilms to inhibition of dental caries (2012)

Alkali production by oral bacteria is believed to have a major impact on oral microbial ecology and to be inibitory to the initiation and progression of dental caries. A substantial body of evidence is beginning to accumulate that indicates the modulation of the alkalinogenic potential of dental biofilms may be a promising strategy for caries control. This brief review highlights recent progress toward understanding molecular genetic and physiologic aspects of important alkali-generating pathways in oral bacteria, and the role of alkali production in the ecology of dental biofilms in health and disease. Oral bacteria that decrease mouth acidity by producing alkali are key players in preventing cavities, according to a review by Robert A Burne of the University of Florida and his colleagues. Mouths are colonized by hundreds of types of bacteria that form biofilms on teeth and contribute to either oral health or disease. Some of these bacteria decrease mouth acidity by metabolizing substances — urea and arginine — that are naturally present in saliva. Burne and colleagues reviewed evidence that these bacteria thereby encourage growth of cavity-preventing bacteria and help to remineralize teeth. They note that more research is needed to clarify whether cavity-free patients have different bacterial communities, or simply different mouth environments. Further studies could also determine whether oral health can be improved by supplementation with arginine or probiotics containing the helpful bacteria.
Paleobotanic evidence of the age of the Morrison Formation (1915)

Research Article| January 01, 1915 Paleobotanic evidence of the age of the Morrison Formation1 EDWARD WILBER BERRY EDWARD WILBER BERRY Search for other works by this author on: GSW Google Scholar GSA Bulletin (1915) 26 (1): 335–342. https://doi.org/10.1130/GSAB-26-335 Article history received: 03 Apr 1915 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation EDWARD WILBER BERRY; Paleobotanic evidence of the age of the Morrison Formation. GSA Bulletin 1915;; 26 (1): 335–342. doi: https://doi.org/10.1130/GSAB-26-335 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract IntroductoryThe only fossil plants that have been recorded from the Morrison formation are the silicified fragments of cycad stumps which occur in such abundance in the Freezeout Hills of Carbon County and at one or two other localities in Wyoming. These were described by Ward2 and referred to the genus Cycadella. About a score of so-called species which were based on external appearance were described. Neither the genus (Cycadella) nor any of the species have ever been found outside the Morrison formation, so that they furnish no direct evidence regarding the age of the deposits. They are, however, very close to the similarly silicified trunks of Cycadeoidea in their habit and general plan of organization. The Cycadeoidea remains are common in the Lakota formation of the Black Hills rim and in the Patuxent formation of Maryland. In the absence of studies of the internal structure of the Morrison genus . . . This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Genistein and quercetin increase connexin43 and suppress growth of breast cancer cells (2006)

Connexin proteins form gap junctions, which permit direct exchange of cytoplasmic contents between neighboring cells. Evidence indicates that gap junctional intercellular communication (GJIC) is important for maintaining homeostasis and preventing cell transformation. Furthermore, connexins may have independent functions including tumor growth suppression. Most tumors express less connexins, have reduced GJIC and have increased growth rates compared with non-tumorigenic cells. The purpose of this study was to determine whether common flavonoids, genistein and quercetin, increase connexin43 (Cx43) levels, improve GJIC and suppress growth of a metastatic human breast tumor cell line (MDA-MB-231). Quercetin (2.5, 5 microg/ml) and genistein (0.5, 2.5, 15 microg/ml) upregulated Cx43 but failed to increase GJIC. Cx43 localized to the plasma membrane following genistein treatment (2.5, 15 mug/ml). In contrast, Cx43 aggregated in the perinuclear region following quercetin treatment (0.5, 2.5, 5, 15 microg/ml). Both genistein (15 microg/ml) and quercetin (2.5, 5, 15 microg/ml) significantly reduced MDA-MB-231 cell proliferation. In summary, genistein and quercetin increase Cx43 and suppress MDA-MB-231 cell proliferation at physiologically relevant concentrations. These results demonstrate that genistein and quercetin are potential anti-breast cancer agents.
Strain-induced irreversible change of the conductive network in a rubber/carbon-black composite revealed by polarization-resolved terahertz dielectric spectroscopy (2022)

The dielectric response during the deformation of a rubber composite filled with carbon black (CB) was studied by polarization-resolved terahertz spectroscopy, because the characterization of such responses can be used to reveal strain-induced irreversible changes in the electrical properties of a CB-filled rubber. During the first stretching-and-relaxation cycle, two characteristic behaviors were observed: strain-induced anisotropy and an irreversible reduction of the dielectric constants in the measured frequency range. To understand the origin of this result, we tried to reproduce the strain dependence of the dielectric function with a modified effective medium theory that accounts for the orientational distribution of the CB aggregates. From the dependence of the fitting parameters on the deformation condition, it was found that the reduction of the dielectric constants in the terahertz frequency range is mainly caused by the breakdown of the CB-based conductive network due to a dissociation of CB agglomerates. This finding indicates that polarization-resolved terahertz spectroscopy is a promising technique for the assessment of changes in the internal structure of CB fillers on the nanometer scale.
Mobile media search (2009)

Recently, many exciting media search applications have been introduced to take advantage of smart phones' audiovisual capture capabilities and their being always on and connected. These applications address a real pain point for most mobile users and allow them to search with minimal text entry, if any. Is the mobile platform an ideal fit for media search? Are audio and visual signal processing technologies sufficiently accurate to support most mobile search applications? What are the killer applications of mobile media search? Earlier in 2009 at ICASSP, a panel on this topic stirred up great interest and enthusiasm while leaving many questions untouched due to the limited time.
Efficient and robust pseudonymous authentication in VANET (2007)

Effective and robust operations, as well as security and privacy are critical for the deployment of vehicular ad hoc networks (VANETs). Efficient and easy-to-manage security and privacy-enhancing mechanisms are essential for the wide-spread adoption of the VANET technology. In this paper, we are concerned with this problem; and in particular, how to achieve efficient and robust pseudonym-based authentication. We design mechanisms that reduce the security overhead for safety beaconing, and retain robustness for transportation safety, even in adverse network settings. Moreover, we show how to enhance the availability and usability of privacy-enhancing VANET mechanisms: Our proposal enables vehicle on-board units to generate their own pseudonyms, without affecting the system security.
Enhancement of Veratridine-Dependent Sodium Channel Activation by Pyrethroids and DDT Analogs (1987)

Pyrethroid insecticides (deltamethrin, NRDC 157, cismethrin), DDT analogs (p,p,'-DDT, o,p'-DDT, methoxychlor, EDO), and a DDT-pyrethroid hybrid compound (GH401) enhanced veratridine-dependent sodium uptake by mouse brain synaptosomes. The effectiveness of these compounds in the sodium uptake assay was in good agreement with their acute mammalian toxicities. p,p'-DDT also enhanced veratridine-dependent sodium uptake by fish brain synaptosomes. These findings demonstrate the utility of ion flux assays to study interactions of insecticides with sodium channels in the central nervous system and to explore species differences in insecticide target site sensitivity.
IFN-γ Potentiates the Release of TNF-α and MIP-1 α by Alveolar Macrophages during Allergic Reactions (1999)

Viral infections play an important role in the exacerbation of asthma. The production of interferons (IFNs) is well known to limit viral spread, but IFN-gamma can also prime alveolar macrophages to release more inflammatory cytokines, such as tumor necrosis factor-alpha (TNF-alpha) and macrophage inflammatory protein-1alpha (MIP-1alpha). Given the importance of these cytokines, we have investigated the effect of IFN-gamma on their release by alveolar macrophages during stimulation by immunoglobulin (Ig)E/anti-IgE. Alveolar macrophages from normal or Nippostrongylus brasiliensis-infected rats, the latter having increased numbers of low-affinity receptors for IgE (Fcepsilon RII) on their alveolar macrophages, were treated with IgE for 2 h and stimulated with anti-IgE for 18 h. The increase of TNF-alpha release (153 +/- 48 pg/10(6) cells) by IgE/anti-IgE occurred only with alveolar macrophages from infected rats. The messenger RNA level for TNF-alpha in rat alveolar macrophages was also increased by stimulation with IgE/anti-IgE. Treatment with IFN-gamma prior to stimulation with IgE/anti-IgE showed a time- and concentration-dependent increase of TNF-alpha release. Interestingly, IgE/anti-IgE treatment did not stimulate the release of MIP-1alpha (15 +/- 5 pg/10(6) cells), but IFN-gamma treatment alone and with IgE /anti-IgE significantly increased and potentiated MIP-1alpha release (98 +/- 40 pg/10(6) cells) by alveolar macrophages, respectively. These results suggest that IFN-gamma produced at times such as during viral infections primes alveolar macrophages for enhanced release of inflammatory mediators during allergic reactions, thereby contributing to the inflammatory process.
Ligament and tendon repair with an absorbable polymer-coated carbon fiber stent. (1986)

Ribbon-like composite structures of filamentous carbon fiber and absorbable polymers have been used in the repair and replacement of both tendons and ligaments. The composite acts as a scaffold upon which new collagenous tissue can grow and has proved successful in a variety of animal models. The results of the first three years of human clinical trials have revealed ingrowth potential similar to that seen in the animal studies. Most patients have shown significant improvement, with many demonstrating good to excellent stability and function.
2009 Winner: Ravi Desai (2010)

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We are pleased to announce that the winner of the 2009 JCS Prize is Ravi Desai, for his paper entitled ‘Cell polarity triggered by cell-cell contact via E-cadherin’ ([Desai et al., 2009][2]). The $1000 prize is awarded annually to the first author of the paper that is judged
Ultrahigh-speed intravascular optical coherence tomography imaging at 3200 frames per second (2013)

We demonstrated intravascular OCT imaging with frame rate up to 3.2 kHz (192,000 rpm scanning). This was achieved by using a custom-built catheter in which the circumferential scanning was actuated by a 1.0 mm diameter synchronous motor. The OCT system was based on a Fourier Domain Mode Locked laser operating at an A-line rate of 1.6 MHz. The diameter of the catheter was 1.1 mm at the tip. Ex vivo images of human coronary artery (~78.4 mm length) were acquired at a pullback speed of 100 mm/s. True 3D volumetric imaging of the entire artery, with adequate sampling in all dimensions, was performed in &lt; 1 second acquisition time.
Mechanistic Studies of the Deoxydehydration of Polyols Catalyzed by a Mo(VI) Dioxo(pyridine-2,6-dicarboxylato) Complex (2023)

The need for renewable resources to displace petrochemical feedstocks is of great interest. Deoxydehydration (DODH) reduces biomass-derived polyols and diols to alkenes and dienes, possibly moving alkene production closer to carbon-neutral sources. We report the DODH of numerous aromatic, aliphatic, and biomass model diols by a dioxo-Mo(VI) catalyst, MoO2(pyridine-2,6-dicarboxylato)(HMPA). Optimal reaction conditions were found using PPh3 and 1-phenyl-1,2-ethanediol yielding up to 93% styrene. Mechanistic studies using in situ infrared spectroscopy support a biexponential kinetic regime where the rate constant of the rate-determining step is ∼5 × 10–5 s–1. DFT calculations support the kinetic studies and suggest that the largest kinetic barrier is a proton transfer from the substrate to a metal–oxo bond during diolate formation.
Synthesis, biological activity and receptor binding affinity of six new antagonists of [8-L-arginine]vasopressin (1989)

Six analogues of d(CH 2 ) 5 AVP, a vasopressin inhibitor, modified in positions 1, 2, 4, and 9 were synthesized and the effect of the modifications on the inhibitory potency was followed. Buly and lipophilic substitutions in position 1 in combination with Abu substitution in position 4 led to a slight decrease of antivasopressor potency and a strong decrease of the antiuterotonic potency. Alkylation of any type of carboxamide group at positions 4 and 9 strongly reduced the biological potency in all the tests.
Two-Dimensional Micromachined Flow Sensor Array for Fluid Mechanics Studies (2003)

We discuss two types of micromachined flow sensors realized by using novel microfabrication processes—a hot-wire anemometer (based on thermal transfer) and a biologically inspired flow sensor (based on momentum transfer). Both sensors are enabled by a new, efficient three-dimensional assembly technique called the plastic deformation magnetic assembly method. The sensors can be packaged in high-density, two-dimensional arrays efficiently, with each sensor node capable of performing two-component or three-component flow sensing. We first discuss the development of new hot-wire anemometers (HWA). The HWA uses a thermal element (hot wire) that is made of Pt/Ni/Pt film with a measured temperature coefficient of resistance of 2,700 ppm/°C. The thermal element is elevated out of plane by using support beams made of polyimide, a polymer material. Both steady-state and transient characteristics of the sensor have been experimentally obtained. The second type of flow sensor is based on momentum transfer principles and inspired by fish lateral line sensors. Each sensor consists of a vertical cilium attached to a horizontal cantilever. Fluid flow imparts moment on the vertical cilium, and causes the horizontal cantilever to bend. The fabrication process and preliminary measurement data are presented.
H1-Antihistamines in the Elderly (2002)

In the elderly, H1-antihistamine therapy is commonly prescribed for treatment of rhinitis, conjunctivitis, pruritus, eczema, urticaria, and for prophylaxis of anaphylactoid reactions. Second-generation H1-receptor antagonists provide excellent, safe, and effective alternatives to first-generation antihistamines in this population, as in younger patients. As with all medications, the choice of which agent to use must be tailored to the needs of the individual. Treatment should be planned with consideration of concomitant medications and potential drug-drug interactions and drug-disease interactions. First-generation antihistamines should not be used for treatment of allergic rhinitis or urticaria in the elderly. Age-related physiological changes can enhance or complicate the actions of H1-receptor antagonists, especially when these drugs are taken concurrently with other medications and/or in the presence of comorbid disease. Adjustments in dosages are necessary when some agents are used in patients with renal and/or hepatic disease; however, overall, the use of the newer nonsedating antihistamines is safe, effective, and gratifying in the elderly.
Optoelectronic and transport properties of Rb/ Cs 2 TeI 6 defective perovskites for green energy applications (2021)

Lead content in perovskite solar cells and other applications is toxic for human health and environment. Therefore, the search alternate materials are required of present era. In this article, we presented physical properties of Rb/Cs2TeI6 defective perovskites for possible solar cell and thermoelectric applications. These compounds were found to be stable in perovskite structure. The band gaps were calculated in close contact to experiments. The optical properties were computed in term of dielectric function, refractive index and optical conductivity. These properties explored suitability of Rb/Cs2TeI6 perovskites for solar cell applications. Also, the high figure of merit (0.687 for Rb2TeI6 and 0.682 for Cs2TeI6 at 1000 K) confirmed position of these compounds in family of efficient thermoelectric materials.
IBS Patients Show Frequent Fluctuations Between Loose/Watery and Hard/Lumpy Stools: Implications for Treatment (2011)

Stool consistency varies greatly within individuals. However, stool patterns are stable within an individual from month to month. The paradoxical findings of greater symptom severity after individual loose/watery BMs vs. greater overall symptom severity in IBS-C implies different physiological mechanisms for symptoms in constipation compared with diarrhea. Daily symptom monitoring is more sensitive and reliable than a questionnaire.
Microcrystalline-Silicon Solar Cells With Photonic Crystals on the Top Surface (2017)

We investigate microcrystalline-silicon (μc-Si) solar cells with photonic crystals on the top surface, which exploit the large-area resonant effect in photonic crystals to enhance light absorption, for the first time. Guidelines for designing the surface photonic crystals are discussed, showing the importance of oblique leakage loss suppression. The influence of direct surface etching of the intrinsic μc-Si layer (or photovoltaic layer) is studied, and it is shown that unbalanced etching of the amorphous and crystalline components of the μc-Si layer deteriorates the electronic performance, in particular, the open-circuit voltage and fill factor. We then introduce photonic crystals under an adequate etching condition, and confirm that the light absorption (or the external quantum efficiency) is successfully enhanced by improving the incident light coupling to the resonant modes. Finally, we fabricate a few-micrometer-thick μc-Si solar cell with a photonic crystal on the top surface and demonstrate an active-area efficiency of 11%, resulting from enhancement of the short-circuit current density, while simultaneously suppressing the deterioration of open-circuit voltage and fill factor. The obtained efficiency is the highest reported for a category of μc-Si solar-cell in which all the n/i/p layers are composed of Si, excluding wide-gap materials such as silicon oxide.
Effect of Exo- and Endothermic Blowing and Wetting Agents on Morphology, Density and Hardness of Thermoplastic Polyurethanes Foams (2008)

Thermoplastic polyurethane (TPU) combines the property characteristics of high quality polyurethane elastomers with the processing efficiency of thermoplastics. Foaming of TPU material inputs for existing applications also leads to improved material properties for new applications. The mixture of exo- and endothermic type of blowing agents is investigated for production of TPU foam technique. Azodicarbonamide (ADC) and sodium bicarbonate are used as exothermic and endothermic blowing agents, respectively. The thermal decomposition and foaming behaviors of blowing agent ADC with kicker and the combination of exo- and endothermic blowing agents are investigated systematically. The ingredients of the mixture of exothermic blowing agent are mixed to suit the processing of TPU. Injection molding of TPU exo- and endothermic blowing agents has been carried out successfully and the morphology is studied using scanning electron microscope. In addition, the effect of wetting agents on the decomposition temperature and processing is also studied. The effectiveness of the use of exo- and endothermic blowing agents is established with the uniform and consistent cell structure with a density reduction of 40% in the foam.
Triaryl‐1,3,5‐triazinane‐2,4,6‐triones (Isocyanurates) Peripherally Functionalized by Donor Groups: Synthesis and Study of Their Linear and Nonlinear Optical Properties (2012)

The linear optical (LO) and nonlinear optical (NLO) properties of a series of isocyanurates functionalized by donor arms at the periphery are reported herein. These octupolar derivatives were obtained in a straightforward way from commercial isocyanate derivatives and were fully characterized. Although several of these compounds are known, those that exhibited the largest NLO activities are all new compounds. In terms of second-order activity, several of these derivatives exhibit remarkable activity/transparency tradeoffs. In terms of third-order activity, the longer derivatives with the stronger donor groups (X = NH(2), NMe(2), or NPh(2)) were shown to possess significant two-photon absorption cross sections. These strongly luminescent derivatives exhibit two-photon absorption cross sections up to 410 GM. DFT computations were also conducted to unravel their electronic structures and to rationalize their NLO properties. To our knowledge, the present study is the first concerned with the nonlinear optical properties of these original cyclotrimers.
Synthesis of unequally spaced arrays by simulated annealing (1996)

Simulated annealing is applied to the synthesis of arrays in order to reduce the peaks of side lobes by acting on the elements' positions and weight coefficients. In the case considered, the number of array elements and the spatial aperture of an unequally spaced array are a priori fixed. Thanks to the high flexibility of simulated annealing, the results obtained for a 25-element array over an aperture of 50/spl lambda/ improve those reported in the literature.
High repetition rate – sub 30 fs – Gigawatt peak power optical parametric amplifier pumped by a chirped pulse fiber amplifier (2009)

We present a parametric amplifier pumped by a high power fiber CPA system. Ultrashort pulses with 29 fs pulse duration and 2 GW peak power have been obtained by amplification of a spectrally broadened signal.