gebhart/patrepeval huggingface dataset:
Resolving non-uniqueness in design feature histories (1999)

Nearly all major commercial computer-aided design systems have adopted a feature-based design approach to solid modeling. Mod-els are created via a sequence of operations which apply design features to incremental versions of a design model. Even surfac-ing, free-form surface shaping, and deformation operations are in-ternally represented in modeling systems as features in a “history tree ” that generates the final design. Much in the same manner that Constructive Solid Geometry (CSG) trees for an individual model can be non-unique, these design feature histories for solid models might be ordered in a number of ways and still result in the same final geometry and topology. We formulate this problem symbolically and present geomet-ric reasoning techniques to generate a canonical form for certain classes of design feature histories. We define this representation as a Model Dependency Graph (MDG) and show how it can be used as a basis for developing techniques for managing databases of solid models. Using the MDG, we introduce algorithms that can assess the similarity of solid models based on design features. We believe these techniques can be used to build intelligent CAD knowledge-bases and to identify meaningful part families from large sets of designs. Lastly, we describe experimental results and performance metrics for our approach.
[Quantitative detection of NADH by in vitro bacterial luciferase bioluminescent]. (2009)

The bacterial luciferase: FMN-NADH oxidoreductase system used to measure NADH concentration was a good attempt to detect living bacterial cells in the fields of environment, food sanitation and other related.
A Frequency-Control Approach by Photovoltaic Generator in a PV–Diesel Hybrid Power System (2011)

A photovoltaic (PV) system's output power fluctuates according to the weather conditions. Fluctuating PV power causes frequency deviations in the power utilities when the penetration is large. Usually, an energy storage system (ESS) is used to smooth the PV output power fluctuations and then the smoothed power is supplied to the utility. In this paper, a simple fuzzy-based frequency-control method is proposed for the PV generator in a PV-diesel hybrid system without the smoothing of PV output power fluctuations. By means of the proposed method, output power control of a PV generator considering the conditions of power utilities and the maximizing of energy capture are achieved. Here, fuzzy control is used to generate the PV output power command. This fuzzy control has average insolation, change of insolation, and frequency deviation as inputs. The proposed method is compared with a maximum power point tracking control-based method and with an ESS-based conventional control method. The numerical simulation results show that the proposed method is effective in providing frequency control and also delivers power near the maximum PV power level.
A Study of Hydraulic Fracture Conductivity and Its Dependence on Proppant Wettability (2010)

Abstract Engineering design of hydraulic fracturing proppants typically focuses on maximizing permeability retention under stress, resistance to high temperatures, and controlling properties such as specific gravity and particle size; less attention is paid to the proppant's wetting characteristics and their potential impact on the deliverability of a hydraulic fracture. The purpose of this work is to investigate the effect of proppant wettability on the conductivity of hydraulic fractures through laboratory measurements. Results demonstrate a competing effect between permeability and wettability, the latter having a diminished impact on displacement efficiency at high permeability values.
Pemphigus vulgaris in Iran: a clinical study of 140 cases (2007)

Although minor differences were noted, the results of this study are in relatively good agreement with the literature with regard to the age, gender, and initial presentation of PV in Iran. Some skin sites, such as the scalp, thorax, and axilla, may be more commonly affected in men. Patients with initial mucosal lesions were significantly younger than those with initial cutaneous involvement. Mucosal lesions other than the oral mucosa may be more common than previously thought.
KS-501 and KS-502, new inhibitors of Ca2+ and calmodulin-dependent cyclic-nucleotide phosphodiesterase from Sporothrix sp. (1989)

New inhibitors of Ca2+ and calmodulin-dependent cyclic-nucleotide phosphodiesterase, KS-501 and KS-502 were isolated from a fungus, Sporothrix sp. KAC-1985. Inhibitory concentration causing 50% inhibition (IC50) values of KS-501 and KS-502 for bovine brain enzyme were 1.8 and 4.3 microM, respectively. The compounds exhibited no or weak inhibition for calmodulin-independent cyclic-nucleotide phosphodiesterases and protein kinase C.
Strategic planning, military style (1998)

RETURN TO ISSUEPREVNewsNEXTStrategic planning, military styleSOPHIE WILKINSONCite this: Chem. Eng. News 1998, 76, 38, 30–31Publication Date (Print):September 21, 1998Publication History Published online16 November 2010Published inissue 21 September 1998https://pubs.acs.org/doi/10.1021/cen-v076n038.p030https://doi.org/10.1021/cen-v076n038.p030newsACS PublicationsCopyright © 1998 American Chemical SocietyArticle Views9Altmetric-Citations-LEARN 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 options Get e-Alerts
A Framework for Multi-FPGA Interconnection using Multi Gigabit Transceivers (2015)

In this paper we present an interconnect framework for FPGAs based on multi gigabit transceivers (MGTs), typically available in modern reconfigurable devices. The framework provides higher bandwidth while using fewer pins compared to existing approaches based on ordinary FPGA IO pins. Unlike other implementations using MGTs for device interconnection, special care has been taken to achieve high throughput and data integrity while keeping latency, resource usage and protocol overhead very low. From a designers perspective, the introduced FPGA interconnect is used like an ordinary asynchronous FIFO allowing easy integration into existing digital designs with no or only very little modification. Depending on the available MGTs, the bandwidth per connection reaches from 3.125 to 28 GBit/s allowing large amounts of data to be moved quickly between multiple FPGAs. The framework allows the use of optical fibers for the data links. This enables an easy distribution of FPGA networks over hundreds of meters. Thus, the presented approach is not only applicable for multi-FPGA prototyping of complex novel computing architectures but also for large data processing facilities commonly found e.g. nearby detectors of large particle accelerator experiments.
STUDIES OF THE ISOLATION AND VIABILITY OF HUMAN ISLETS OF LANGERHANS1,2 (1988)

Pancreas obtained from 34 adult human cadaver organ donors was divided into proximal and distal segments, and the duct to each segment was cannulated. Collagenase was injected into the proximal duct of 7 glands and into the distal duct of 7 others; the duct of the opposite segment was perfused with collagenase. The pancreas was then dispersed by teasing, trituration, and passage through filters. Perfused proximal and distal segments released 1461 +/- 287 and 2728 +/- 797 islets/g (+/- SEM) versus 710 +/- 149 (P less than 0.05) and 1950 +/- 636 after injection. Twenty other pancreases were perfused with collagenase warmed rapidly to 39 degrees C (n = 4) or warmed slowly to 37 degrees C (n = 6) or 39 degrees C (n = 10): the yield was 1625 +/- 632, 1320 +/- 116, and 2009 +/- 277 islets/g respectively. Total yields from the latter were 76 X 10(3) large (greater than 100 microns) and 85 X 10(3) small (less than 100 microns) islets with recoveries of 61% and 42%, respectively, after Ficoll density gradient purification. Histology showed highly purified islets. Perifusion with glucose elicited a biphasic release of insulin with the mean response (microU/islet/min) rising to a first peak of 0.5 and constant second phase secretion of 0.25, followed by a return to baseline. Reduced response was observed for islets from pancreas stored greater than 6 hr and tissue obtained from multiple centers. Less insulin was produced by freshly isolated islets, islets less than 100 microns, and after Ficoll separation. Secretion was similar for islets derived from proximal or distal segments. Perfusion of collagenase via the ducts of human pancreas improves islet isolation and Ficoll gradient separation yields highly purified islets. Important factors influencing insulin secretion are the source of donor tissue, cold storage of pancreas, Ficoll purification, islet size, and tissue culture.
Investigation of optical nonlinearities in an ultra-high-Q Si nanocavity in a two-dimensional photonic crystal slab (2006)

We investigated the characteristics of an ultra-high-Q photonic nanocavity (Q = ~230,000 and modal volume = ~1.2 cubic wavelengths) at various input light powers. The cavity characteristics were red-shifted as the input power increased. This nonlinearity could be explained by coupled-mode theory, taking into account two-photon absorption, the associated free-carrier absorption, consequent free-carrier absorption, plasma effect, thermo-optic effect, and a Kerr effect. Nonlinear cavity characteristics were observed at an extremely low input light power of 10 muW. We confirmed that these low-power nonlinear optical effects could be attributed to the ultra-high Q factor of the nanocavity.
Preserving Wood by Brush, Dip, and Short-Soak Methods (1965)

Production Economics, Research and Development/Tech Change/Emerging Technologies
Tidal power in the United Kingdom (1993)

This presentation describes the review of tidal power potential in the UK and of current efforts to utilize the resource. The topics of the presentation include the resource of the Severn Estuary, Conwy Estuary, and Wyre Estuary, general comparisons and development work, generic research on reducing technical and environmental uncertainties, and capitalized costs for the designs on the Mersey and Severn Estuaries.
A Multi-Period Framework for Coordinated Dispatch of Plug-in Electric Vehicles (2016)

Coordinated dispatch of plug-in electric vehicles (PEVs) with renewable energies has been proposed in recent years. However, it is difficult to achieve effective PEV dispatch with a win-win result, which not only optimizes power system operation, but also satisfies the requirements of PEV owners. In this paper, a multi-period PEV dispatch framework, combining day-ahead dispatch with real-time dispatch, is proposed. On the one hand, the day-ahead dispatch is used to make full use of wind power and minimize the fluctuation of total power in the distribution system, and schedule the charging/discharging power of PEV stations for each period. On the other hand, the real-time dispatch arranges individual PEVs to meet the charging/discharging power demands of PEV stations given by the day-ahead dispatch. To reduce the dimensions of the resulting large-scale, non-convex problem, PEVs are clustered according to their travel information. An interval optimization model is introduced to obtain the problem solution of the day-ahead dispatch. For the real-time dispatch, a priority-ordering method is developed to satisfy the requirements of PEV owners with fast response. Numerical studies demonstrate the effectiveness of the presented framework.
Sustained release of insulin from a hydrophilic polymer matrix implanted in diabetic rats. (1988)

A long-acting insulin preparation involving the sustained release of biologically active insulin from a hydrophilic ethylene-vinyl alcohol (EVAl) matrix was developed. A single subcutaneous implant of this insulin lowered the blood glucose levels of diabetic rats for more than one month. These results suggest that a long-acting insulin may be produced by the entrapment of insulin within a hydrophilic EVAl copolymer matrix.
Collagen Fibers as a Fleece Hemostatic Agent (1980)

The hemostatic efficacy of collagen fibers as a fleece hemostatic agent (CFH) is compared with the efficacy of three commercially available agents: collagen powder (Avitene), absorbable gelatin sponge, and oxidized cellulose. Identical quantities of the four materials were applied to identical multiple spleen incisions in five dogs; CFH and collagen powder proved three times as effective as the other two mateials. CFH and collagen powder were then compared with regard to hemostatic efficacy, handling characteristics, and tissue reaction. Different weights of the materials were applied to multiple spleen lacerations in 12 dogs and spleen avulsions in 12 dogs. The hemostatic efficacy of the materials was similar, but CFH was superior with regard to handling characteristics and tissue reaction. Another experiment, with six pigs, showed that CFH can be successfully sutured as a patch to profusely bleeding lacerations of the spleen, liver, and kidney.
Lactose-Hydrolyzed Milk Is More Prone to Chemical Changes during Storage than Conventional Ultra-High-Temperature (UHT) Milk (2014)

The enzymatic hydrolysis of lactose to glucose and galactose gives rise to reactions that change the chemistry and quality of ambient-stored lactose-hydrolyzed ultra-high-temperature (UHT) milk. The aim of the present study was to investigate and compare chemical changes in lactose-hydrolyzed and conventional UHT milk during a 9 month ambient storage period. Several complementary analyses of volatiles, free amino acids, acetate, furosine, and level of free amino terminals were concluded. The analyses revealed an increased level of free amino acids and an increased formation rate of specific compounds such as furosine and 2-methylbutanal in lactose-hydrolyzed UHT milk compared to conventional UHT milk during storage. These observations indicate more favorable conditions for Maillard and subsequent reactions in lactose-hydrolyzed milk compared to conventional UHT milk stored at ambient temperature. Furthermore, it is postulated that proteolytic activity from the lactase-enzyme preparation may be responsible for the observed higher levels of free amino acids in lactose-hydrolyzed UHT milk.
International Tax Competition: Harmful or Beneficial? (1998)

International Tax Competition: Harmful or Beneficial? Get access Mason Gaffney Mason Gaffney Professor of Economics University of California (Riverside)USA Contact: Tel: +1 909 787 5037 Fax: +1 909 787 5685 Email: mgaffney@ucr.campus.mci.net Search for other works by this author on: Oxford Academic Google Scholar Trusts & Trustees, Volume 4, Issue 10, October 1998, Pages 20–23, https://doi.org/10.1093/tandt/4.10.20 Published: 01 October 1998
Radiation pattern synthesis for arrays of conformal antennas mounted on arbitrarily-shaped three-dimensional platforms using genetic algorithms (2003)

A domain-decomposition/reciprocity procedure is presented which allows the radiation patterns of microstrip patch antennas mounted on arbitrarily-shaped three-dimensional perfectly electric conducting (PEC) platforms to be computed accurately as well as efficiently. The utility of this technique is demonstrated by considering an example consisting of a nine-element conformal array of microstrip patch antennas mounted axially along a finite-length PEC circular cylinder. It is shown that the elements close to the ends of the cylinder have significantly different patterns than those close to the center of the cylinder. The results from this example suggest that the common practice where all the individual element patterns are assumed identical is not always valid and, in fact, can lead to significant performance degradation in the design of conformal phased arrays. This observation is supported by the fact that an attempt to steer the main beam of the nine-element conformal array to an angle /spl theta//sub 0/=60/spl deg/ using a standard uniform progressive phase shifting technique proves unsuccessful. Next a genetic algorithm (GA) synthesis procedure is introduced that is capable of determining the optimal set of element excitation phases required to yield a desired or specified far-field radiation pattern. The results of this GA phase-only optimization are shown to yield the desired main beam steered to the correct angle for this nine-element linear array mounted on a circularly cylindrical platform. The GA radiation pattern synthesis procedure introduced appears to be a highly effective means of correcting for platform effects on the individual element patterns of a conformal phased array.
Experimental evaluation of a variable-speed, doubly-fed wind-power generation system (2002)

The authors evaluate the potential of a brushless doubly fed generation system for wind power applications. A 1.5 kW proof-of-concept laboratory prototype is used to investigate the feasibility of the proposed variable-speed generation principle. Experimental results show that the prototype system can achieve high efficiency over a range of speeds. The system efficiencies achieved at the power levels considered compare favorably with conventional squirrel cage induction machines. It is experimentally demonstrated that the brushless double fed system achieves variable-speed operation with a power converter of reduced rating. For the prototype under consideration, a 2:1 speed range can be covered with a converter rated at approximately 25% of system capacity. While reactive power control can be realized with the proposed system, the magnitude is limited by the desired low converter rating. The prototype system is also shown to exhibit excellent output current waveforms.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
[Color vision defects of macular diseases]. (1991)

Patients with macular diseases such as x-linked juvenile retinoschisis, cone dystrophy, and age-related macular degeneration were studied regarding color vision defects. In 9 of 15 eyes of patients with x-linked juvenile retinoschisis, blue-yellow defects were demonstrated. In the older patients with this dystrophy, color vision defects were more severe than in younger ones. Fluorescein angiography revealed retinal pigment epithelium (RPE) atrophy at the macular area in these older patients. Therefore, it was suggested that the color vision defects were due to dysfunction of the outer sensory retina, occurring secondarily to the inner sensory retina. In patients with cone dystrophy, all the examined eyes showed severe color vision defects. It was proved that the size of the atrophic lesion which when ophthalmoscopically evaluated was found to have some relationship with the degree of color vision defects. In patients with age-related macular degeneration, most of the examined eyes showed color vision defects. Moreover eyes with soft drusen formation and/or RPE detachment usually showed more severe color vision defects than the eyes with hard drusen formation and/or RPE atrophy.
The Transition Metal-rich Orthophosphate Arrojadite with Special Structural Features (2010)

The crystal structure of the transition metal-rich orthophosphate mineral arrojadite was reexamined, and the disorder phenomena were analyzed applying modern X-ray single-crystal diffraction and refinement methods on samples from Nickel Plate (USA) and Hagendorf (Germany). As a new feature of the arrojadite structure, two different types of channels oriented along [010] are described. The occupancy of the atomic positions inside these channels have been elucidated.
Organic photodiodes for industrial sensing and medical imaging (2013)

In this thesis it is discussed a new class of X-ray sensors based on organic semiconductors. The detectors here presented are organic photodiodes coupled with an inorganic scintillator layer. It is discussed, how photodiode characteristics such as dark current or external quantum efficiency are influenced by the semiconductor, cathode or interlayer material, the active area of the diode, the thickness of the active layer or the solvent used during the fabrication process.
Case Study of Nearfield Acoustic Holography and Intensity Probe as Applied to an Open Hood Intensity Test (1996)

Nearfield Acoust ic Holography (NAH) is a powerful measurement technique which has begun to gain acceptance in the engineering community. This acoustic array technique has been presented as an alternative to standard intensity measurements which use a dual microphone intensity probe. The experimental results and practical measurement efficiency of both techniques as applied to an automotive open hood intensity test are compared in this paper.
Main Chamber Injectors for Advanced Hydrocarbon Booster Engines (2003)

Achieving the highest possible specific impulse has long been a key driver for space launch systems. Recently, more importance has been placed on the need for increased reliability and streamlined launch operations. These general factors along with more specific mission requirements have provided a new focus that is centered on the oxidizer rich staged combustion (ORSC) cycle. Despite a history of use in Russia that extends back to the 1960's, a proven design methodology for ORSC cycle engines does not exist in the West. This lack of design expertise extends to the main chamber injector, a critical subcomponent that largely determines the engine performance and main chamber life. The goals of the effort described here are to establish an empirical knowledge base to provide a fundamental understanding of main chamber injectors and for verification of an injector design methodology for the ORSC cycle. The design of a baseline injector element, derived from information on Russian engines in the open literature, is presented. The baseline injector comprises a gaseous oxidizer core flow and an annular swirling fuel flow. Sets of equations describing the steady-state and the dynamic characteristics of the injector are presented; these equations, which form the basis of the design analysis methodology, will be verified in tests later this year. On-going cold flow studies, using nitrogen and water as simulants, are described which indicate highly atomized and symmetric sprays.