gebhart/patrepeval huggingface dataset:
Attenuation correction for cardiac dual-head gamma camera coincidence imaging using segmented myocardial perfusion SPECT. (2000)

Reasonably accurate attenuation-corrected cardiac DHC images can be obtained using AC-RS without the need for transmission scanning.
Polysaccharide interactions with wheat proteins and flour doughs. (1979)

Because of the generally lower bread baking quality of soft wheat flours, polysaccharide additives that might improve their performance were explored. Extracellular microbial polysaccharides, carrageenans and an alginate were added to soft wheat flour doughs before mixing in the farinograph. When added in concentrations lower than 0.6%, 2 microbial polysaccharides increased peak time and dough stability as measured by the farinograph. By adding certain microbial polysaccharides and small amounts of a commercial carrageenan gum, the mixing characteristic of the dough could be varied extensively, even approximating those of strong flours. To determine polysaccharide-protein interactions, the polysaccharides were added to partially purified gluten solutions and the turbidity and viscosity were determined. The reactions, which varied from no apparent interaction to strong association and precipitation, suggest possible use of the gums as scavengers for proteins in dilute wastewater solutions or in texturized protein foods.
Infrared Properties of Solid Titanium Oxides: Exploring Potential Primary Dust Condensates (2003)

We present optical constants and opacities of solid TiO2, Ti2O3, magnesium and calcium titanates, largely based on laboratory measurements. These dust species deserve interest as potential primary condensates in oxygen-rich dusty environments. Of the three known solid TiO2 phases, only one (rutile) has been extensively studied so far with respect to its mid-IR optical properties. We compare these with our measurements of the optical constants of anatase, brookite, and CaTiO3. Furthermore, for several Mg-Ti-oxides, powder transmission spectra are shown. While all known TiO2 modifications have their strongest bands between 13 and 13.5 μm (for spherical particles), CaTiO3, MgTiO3, and other Mg titanates have principal maxima of their absorption coefficients between 14 and 19 μm. This makes a spectroscopic identification of circumstellar Ti oxide particles rather difficult, because both the 13 and the 14-19 μm region are crowded with other features in the spectra of oxygen-rich circumstellar shells.
Monte Carlo simulations of laser Doppler blood flow measurements in tissue (1990)

Light propagation in a model for blood perfusion in tissue was simulated with Monte Carlo calculations to investigate the dependence of the output of laser Doppler perfusion meters on the configuration of the optical probe and on the multiple scattering of photons by moving particles in the tissue. Laser Doppler perfusion meters registrating the first moment ?v? and the first weighted moment ?v?(s) of the spectral power density S(v) of intensity fluctuations on a detector viewing tissue illuminated by a laser are considered. The model was scaled up about a factor of 10 compared with real tissue, to make experimental tests possible. From the simulations of the Doppler scattering, it will be shown that the location of the effective probe volume of the perfusion meter can be extended to deeper layers in tissue by increasing the distance between the illuminating light beam and the detector. This opens the possibility to measure perfusion in skin layers as a function of the distance to the surface. Other calculations show how the degree of multiple scattering of individual photons by moving cells determines which flow parameter is measured with the perfusion meter. If the degree is low, the output of the meter depends linearly on the mean velocity of cells. For high degrees, a dependence on the root mean square value of this distribution is found. At a high moving particle concentration, multiple scattering by moving particles also results in deviations from the linear dependence of ?v? on the concentration of moving particles and in deviations from the concentration independence of ?v?(s). Intensity distributions of light inside the tissue model were obtained from the simulations.
DOWN-REGULATION OF NF-κB LED TO UP-REGULATION OF NGF PRODUCTION IN MOUSE OSTEOBLASTS (2009)

For investigation of the molecular cascade leading to nerve growth factor (NGF) in mouse osteoblastic MC3T3-E1 cells, pyrrolidine dithiocarbamate (PDTC), an NF-kappaB inhibitor, was utilized. A dose-dependent PDTC-elicited stimulation of NGF production occurred in the cells. PDTC attenuated the NF-kappaB nuclear translocation, whereas PDTC had no effects on the cell proliferation, apoptosis, differentiation, or cell cycle. The cell membrane-permeable SN50 peptide (a specific NF-kappaB inhibitor peptide) also blocked the NF-kappaB translocation to the nucleus, and induced NGF protein in the cells. These findings demonstrate that the suitable suppression of NF-kappaB nuclear translocation induced NGF production in non-neuronal osteoblastic cells.
Synthesis and fluorescence of <i>N</i>‐substituted‐1,8‐naphthalimides (1986)

Abstract A number of novel N ‐substituted‐1,8‐naphthalimides have been prepared and their fluorescence yields measured in water at p H 7.4. The type of substitutent and the substitution pattern on the naphthalimide nucleus produce markedly different fluorescence yields, (quantum efficiencies, ø varying from ø = 0‐0037 for N ‐(3‐N'‐morpholino‐1‐propyl)‐4‐amino‐3‐methoxy‐1,8‐naphthalirnide (7) to ø = 0–77 for N ‐(3‐bromopropyl)‐4‐acetamido‐1,8‐naphthalimide (31).
Internalized stigma among sexual minority adults: Insights from a social psychological perspective. (2015)

This article describes a social psychological framework for understanding sexual stigma, and it reports data on sexual minority individuals' stigma-related experiences. The framework distinguishes between stigma's manifestations in society's institutions (heterosexism) and among individuals. The latter include enacted sexual stigma (overt negative actions against sexual minorities, such as hate crimes), felt sexual stigma (expectations about the circumstances in which sexual stigma will be enacted), and internalized sexual stigma (personal acceptance of sexual stigma as part of one's value system and self-concept). Drawing from previous research on internalized sexual stigma among heterosexuals (i.e., sexual prejudice), the article considers possible parallels in how sexual minorities experience internalized sexual stigma (i.e., self-stigma, or negative attitudes toward the self). Data are presented from a community sample of lesbian, gay, and bisexual adults (N = 2,259) to illustrate the model's utility for generating and testing hypotheses concerning self-stigma.
Aviation Security in Airport Development (1995)

Many existing airport facilities throughout the world date from a time before measures to prevent acts of unlawful interference with civil aviation had to be introduced. It may take up to ten years for a new airport terminal, for example, to be taken from it's original conception to being fully commissioned, and even assuming a change for the worse in terms of attacks on civil aviation during that period, the basic design that is being executed may be far from ideal from a security standpoint. Not only will the requirements of the regulator be difficult if not impossible to meet, but the efficiency of terminal operations will suffer, and the customers will be inconvenienced. It is essential, therefore, for the needs of security to be included in every aspect of planning, design and construction, whether new facilities are involved or major redevelopments are planned.
Topochemical Synthesis of Plate‐Like Na <sub>0.5</sub> Bi <sub>0.5</sub> TiO <sub>3</sub> from Aurivillius Precursor (2008)

Plate‐like Na 0.5 Bi 0.5 TiO 3 (NBT) particles with perovskite structure were synthesized by topochemical microcrystal conversion from plate‐like particles of layer‐structured Na 0.5 Bi 4.5 Ti 4 O 15 (NBIT) at 950°C in NaCl molten salt. As the precursors of NBT, plate‐like NBIT particles were first synthesized by molten salt process by the reaction of Bi 4 Ti 3 O 12 , Na 2 CO 3 , and TiO 2 . After the topochemical reactions, layer‐structured NBIT particles were transformed to the perovskite NBT platelets. NBT particles with a thickness of approximately 0.5 μm and a length of 10–15 μm retained the morphology feature of the precursor. High‐aspect‐ratio NBT platelets are suitable templates to obtain textured ceramics (especially NBT‐based ceramics) by (reactive) template grain growth process.
Synthesis of six-membered-ring analogs of 6.alpha.-carba-PGI2 (1982)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of six-membered-ring analogs of 6.alpha.-carba-PGI2John C. SihCite this: J. Org. Chem. 1982, 47, 22, 4311–4315Publication Date (Print):October 1, 1982Publication History Published online1 May 2002Published inissue 1 October 1982https://pubs.acs.org/doi/10.1021/jo00143a027https://doi.org/10.1021/jo00143a027research-articleACS PublicationsRequest reuse permissionsArticle Views130Altmetric-Citations13LEARN 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-Alertsclose Get e-Alerts
Spread-spectrum multiple-access performance of orthogonal codes for indoor radio communications (1990)

Direct-sequence spread spectrum, with its inherent resistance to multipath, is a promising technique for indoor wireless communication. To allow multiple users within a limited bandwidth, code division multiple access (CDMA) is needed. The bandwidth efficiency of M-ary CDMA systems in fading multipath indoor radio channels is analyzed. It is shown that M-ary signaling improves the bandwidth efficiency significantly when compared to binary signaling.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Bhimamycin A≈E and Bhimanone: Isolation, Structure Elucidation and Biological Activity of Novel Quinone Antibiotics from a Terrestrial Streptomycete. (2004)

Abstract For Abstract see ChemInform Abstract in Full Text.
Purification and Characterization of Assembly-Competent Tubulin from Aspergillus nidulans (1995)

We have developed a procedure for purifying assembly-competent tubulin from Aspergillus nidulans. To our knowledge, this is the first report of the purification of assembly-competent tubulin from a filamentous fungus, and the procedure should be of great value in analyzing the large number of alpha- and beta-tubulin mutations that have been isolated and characterized in A. nidulans. Our procedure consists of overproduction of alpha- and beta-tubulin, partial purification by ion-exchange chromatography, and final purification by rounds of assembly and disassembly. We have found that taxol promotes the assembly of A. nidulans tubulin into microtubules, but a higher concentration of taxol is required for maximal assembly of A. nidulans tubulin than is required for brain tubulin. The critical concentration for assembly in the presence of taxol is also significantly higher for A. nidulans tubulin than for brain tubulin. In addition, A. nidulans microtubules that were assembled and maintained in the presence of taxol depolymerized in conditions in which taxol-stabilized mammalian microtubules remain intact. These results suggest that A. nidulans tubulin has a lower affinity for taxol than mammalian tubulin.
Thermal Stability of Hexamethyldisiloxane (MM) for High-Temperature Organic Rankine Cycle (ORC) (2016)

The design of efficient Organic Rankine Cycle (ORC) units for the usage of industrial waste heat at high temperatures requires direct contact evaporators without intermediate thermal oil circuits. Therefore, the thermal stability of high-temperature working fluids gains importance. In this study, the thermal degradation of hexamethyldisiloxane (MM) is investigated in an electrically heated tube. Qualitative results concerning remarks on degradation products as well as quantitative results like the annual degradation rate are presented. It is shown that MM is stable up to a temperature of 300 °C with annual degradation rates of less than 3.5%. Furthermore, the break of a silicon–carbon bond can be a main chemical reaction that influences the thermal degradation. Finally, it is discussed how the results may impact the future design of ORC units.
Enhancing QoS Support for Vertical Handoffs Using Implicit/Explicit Handoff Notifications (2005)

Vertical handoffs between different wireless technologies usually lead to dramatic changes in the link capacity. A successful QoS solution for vertical handoffs must be able to fast track the capacity changes and agilely adapt the delivery rates and qualities of the ongoing applications. Though traditional AIMD-based source adaptation schemes (as found in TCP, TFRC, etc.) have been well designed for mild, gradual rate adjustments required by load fluctuations and network congestion, their response time is inadequate when the rate must be adjusted to the drastic network capacity changes that are typical in vertical handoff scenarios. To expedite the response to such changes, we propose in this paper two adaptive algorithms, named the fast rate adaptation (FRA) and early rate reduction (ERR), that are launched when the handoff is from low to high capacity (LOW-to-HIGH) or from high to low capacity (HIGH-to-LOW), respectively. We also propose two vertical handoff notification mechanisms to work with FRA and/or ERR, i.e. the implicit handoff notification (IHN) and explicit handoff notification (EHN). We show by simulation that our proposed schemes are able to provide better QoS support than the traditional AIMD based schemes during vertical handoffs.
Programming, compiling and executing partially-ordered instruction streams on scalable shared-memory multiprocessors (1994)

Performance in large-scale shared-memory multiprocessors depends on finding a scalable solution to the memory-latency problem. The author shows that protect consistency (PRC) relaxes previous consistency models with two distinct performance benefits. First, PRC is used to expose and exploit more parallelism in the computation, giving better support to latency tolerance. Second, assuming that visible synchronization directly coordinates changes in the writability of shared data, PRC is used to create more situations where cached data are reusable, giving better support to latency avoidance. The paper evaluates PRC in the context of relaxing intrathread dependences for multithreaded architectures. After the PRC programming notation is described, programming and compiling aspects are examined, and architectural support is discussed.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
The natural carbon cycle and life on earth (2007)

Our knowledge about the global carbon cycle can be made more robust by making use of the condition of mass continuity, distributions of tracers and interactions with the the nutrient cycles.
Inhibition of neuroeffector transmission in human vas deferens by sildenafil (2000)

Sildenafil (0.1 - 30 microM), a cyclic GMP phosphodiesterase 5 (PDE 5) inhibitor, induced inhibition of electrically evoked contractions of ring segments of human vas deferens from 34 vasectomies. Zaprinast (0.1 - 100 microM), another PDE 5 inhibitor, and the nitric oxide (NO) donor sodium nitroprusside (SNP) (0.1 - 100 microM) had no effect on neurogenic contractions. The inhibition induced by sildenafil was not modified by the inhibitor of guanylate cyclase 1H-[1,2,4]oxadiazolo[4,3-a]quinoxaline-1-one (ODQ) (1 - 30 microM) but it was abolished by the K(+) channel blockers tetraethylammonium (TEA, 1 mM), iberiotoxin (0.1 microM) and charybdotoxin (0.1 microM). Sildenafil, zaprinast and SNP did not affect the contractions induced by noradrenaline. SNP (10 microM) caused elevation of cyclic GMP levels that was potentiated by sildenafil (10 microM) and zaprinast (100 microM). ODQ (10 microM) inhibited the increase in cyclic GMP. Sildenafil inhibits adrenergic neurotransmission in human vas deferens. The inhibition is not related to accumulation of cyclic GMP but is probably due to activation of prejunctional large-conductance Ca(2+)-activated K(+) channels.
A novel iterative receiver for coded MIMO OFDM systems (2004)

We propose a novel iterative receiver for coded multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. Starting from the derivation of the optimal minimum mean squared error (MMSE) estimate of the transmitted data, we show that for BPSK and QPSK modulated signals, the soft estimate is a hyperbolic tangent function of the extrinsic information from the soft-input soft-output (SISO) decoder and the decision statistic from the detector. Compared with the conventional iterative receiver which computes the data estimate using only the decoder output, the proposed structure has significant performance gain, for example, it is 2.0 dB better for groupwise space time block coded (GSTBC) MIMO OFDM system at BER of 10/sup -6/, and 1.5 dB better for vertical Bell Lab layered space-time (VBLAST) OFDM system at BER of 10/sup -5/.
An evaluation of animated demonstrations of learning computer-based tasks (1991)

Article An evaluation of animated demonstrations of learning computer-based tasks Share on Authors: Susan Palmiter Center for Ergonomics, Department of Industrial and Operations Engineering, 1205 Beal Avenue, The University of Michigan, Ann Arbor, MI Center for Ergonomics, Department of Industrial and Operations Engineering, 1205 Beal Avenue, The University of Michigan, Ann Arbor, MIView Profile , Jay Elkerton Center for Ergonomics, Department of Industrial and Operations Engineering, 1205 Beal Avenue, The University of Michigan, Ann Arbor, MI and Philips Laboratories, 345 Scarborough Rd., Briarcliff Manor, NY Center for Ergonomics, Department of Industrial and Operations Engineering, 1205 Beal Avenue, The University of Michigan, Ann Arbor, MI and Philips Laboratories, 345 Scarborough Rd., Briarcliff Manor, NYView Profile Authors Info & Claims CHI '91: Proceedings of the SIGCHI Conference on Human Factors in Computing SystemsApril 1991 Pages 257–263https://doi.org/10.1145/108844.108906Online:01 March 1991Publication History 46citation974DownloadsMetricsTotal Citations46Total Downloads974Last 12 Months24Last 6 weeks3 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteGet Access
Cloud security: Analysis and risk management of VM images (2012)

Cloud computing may be defined as management and provision of resources, software, applications and information as services over the cloud (internet) on demand. Cloud computing is a flexible, cost-effective, and proven delivery platform for providing business or consumer IT services over the Internet. With its ability to provide users dynamically scalable, shared resources over the Internet and to avoid large upfront fixed costs, cloud computing has recently emerged as a promising hosting platform that performs an intelligent usage of a collection of services, applications, information and infrastructure comprised of pools of computer networks, information and storage resources. However, critical information on the cloud motivates the hackers and presents a serious threat to the critical information, thus creating a need for security. In this paper, we explain how cloud computing along with its open secure architecture emphasize on various security threats in cloud computing, the existing methods to control them, along with their pros and cons. This research paper also focuses on providing the security on VM images which are the foundation for the overall security of the cloud.
Tunable liquid crystal q-plates with arbitrary topological charge (2011)

Using a photoalignment technique with a sulphonic azo-dye as the surfactant aligning material, we fabricated electrically tunable liquid crystal q-plates with topological charge 0.5, 1.5 and 3 for generating optical vortex beams with definite orbital angular momentum (OAM) 1,3 and 6 per photon (in units of h𤋮 respectively. We carried out several tests on our q-plates, including OAM tomography, finding excellent performances. These devices can have useful applications in general and quantum optics.
Improvement of seed yields under boron‐limiting conditions through overexpression of BOR1, a boron transporter for xylem loading, in <i>Arabidopsis thaliana</i> (2006)

Soil fertilization is a common practice in modern agriculture, undertaken to prevent nutrient deficiency in crops. However, fertilization is costly and causes environmental pollution. The cultivation of plants that tolerate low nutrient supplies may circumvent this problem. Here, we report the generation of Arabidopsis thaliana plants that tolerate boron (B)-deficient conditions due to the overexpression of BOR1, an efflux B transporter that is required for efficient xylem loading of B. In several independently generated transgenic plants expressing BOR1 or BOR1-GFP under the control of the cauliflower mosaic virus 35S RNA promoter, root-to-shoot translocation of B was enhanced and shoot growth was greater under B-limiting conditions compared with wild-type plants. In addition, the transgenic plants showed increased translocation of B, especially to the shoot apex, and set seed normally under B-limiting conditions, under which wild-type plants failed to set seed. This study therefore reports plants that show improved seed yields compared with wild-type under nutrient-deficient conditions as a result of increased production of an essential mineral nutrient transporter.