gebhart/patrepeval huggingface dataset:
Evaluation of a Chemical Spot-Test Kit for the Detection of Airborne Particulate Lead in the Workplace (1996)

A commercial rhodizonate-based test kit was evaluated for its potential use in the detection of lead in airborne particulate samples at work sites. Over 350 air samples were collected at abrasive blasting lead paint abatement sites using cellulose ester membrane filters and personal sampling pumps. The filter samples were tested with the chemical spot test and then analyzed by graphite furnace atomic absorption spectrophotometry. No positive readings were recorded for lead masses below 1.3 micrograms Pb/filter, and no negative readings were observed for lead amounts above 8.1 micrograms Pb/filter. Experimental data were statistically molded in an effort to estimate the performance parameters of the spot test kit. The identification limit of the kit was found to be approximately 3.6 microgram/filter sample. For lead mass values above approximately 10 micrograms Pb/filter, 95% confidence of a positive reading was found, while 95% confidence of a negative reading was found for lead masses below approximately 0.6 micrograms Pb/filter. Based on the results of this study the rhodizonate-based test kit for lead demonstrates potential for use in field screening for lead in personal breathing zone and area air samples.
Relating Static and Ultrasonic Laboratory Measurements to Acoustic Log Measurements in Tight Gas Sands (1992)

Abstract A comparison of Young's moduli and Poisson's ratios obtained from ultrasonic laboratory measurements with static moduli obtained under identical stress conditions shows that the Young's moduli are 1 to 6 times higher under ultrasonic loading conditions. A comparison of these two laboratory measured quantities with log derived moduli measured at 20 KHz indicates that Eultrasonic&gt; Esonic &gt; Estatic, The clay content and porosity of the samples varied from 1 % to 54.5% and 3% to 17.5%, respectively. This clearly suggests that a wide variety of sandstones behave in a viscoelastic manner. The magnitude of the variation with frequency is a function of the clay content, grain size, shape of intergranular contacts, mineralogy and fluid saturations. A model is presented that describes this observed viscoelastic behavior. The measured static moduli are a function of the sample length. This effect is investigated in some detail. The reported static moduli were obtained at L/d ratios of 2. When comparing log measurements to core, two inherent problems were encountered: depth correlation and sample size. These effects need to be properly accounted for when comparing logs with cores.
Differentiating positive emotions elicited by products; An exploration of perceived differences between 25 positive emotions by users and designers (2013)

This paper reports semi-qualitative research on emotions from the perspective of users and designers. Twenty-five positive emotions were ranked regarding four relevant issues for product design: frequency of experience, preference for experience, preference for elicitation, and difficulty in elicitation. Based on the results from this research the emotions that users frequently experience and prefer are: satisfaction, inspiration, confidence, joy, amusement, and relaxed. These emotions ranked high also among those that designers prefer to elicit. Emotions that are infrequently experienced and not preferred by both users and designers are: lust and worship. In relation to the difficulty of eliciting positive emotions through durable products, the conclusion is that it is a challenging task and little knowledge exists to support designers. The knowledge developed through this project is expected to be useful for designers and researchers to understand the role of positive emotions in product design.
Creative Writing with a Machine in the Loop (2018)

As the quality of natural language generated by artificial intelligence systems improves, writing interfaces can support interventions beyond grammar-checking and spell-checking, such as suggesting content to spark new ideas. To explore the possibility of machine-in-the-loop creative writing, we performed two case studies using two system prototypes, one for short story writing and one for slogan writing. Participants in our studies were asked to write with a machine in the loop or alone (control condition). They assessed their writing and experience through surveys and an open-ended interview. We collected additional assessments of the writing from Amazon Mechanical Turk crowdworkers. Our findings indicate that participants found the process fun and helpful and could envision use cases for future systems. At the same time, machine suggestions do not necessarily lead to better written artifacts. We therefore suggest novel natural language models and design choices that may better support creative writing.
α-Furfuryl Bromide (2-Bromomethylfuran) (1939)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTα-Furfuryl Bromide (2-Bromomethylfuran)J. E. Zanetti and J. T. BashourCite this: J. Am. Chem. Soc. 1939, 61, 8, 2249–2251Publication Date (Print):August 1, 1939Publication History Published online1 May 2002Published inissue 1 August 1939https://pubs.acs.org/doi/10.1021/ja01877a506https://doi.org/10.1021/ja01877a506research-articleACS PublicationsRequest reuse permissionsArticle Views265Altmetric-Citations15LEARN 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
Propagation loss in slow light photonic crystal waveguides (2012)

The ﬁeld of nanophotonics is a major research topic, as it offers potential solutions to\nimportant challenges, such as the creation of low power, high bandwidth interconnects or\noptical sensors. Within this ﬁeld, resonant structures and slow light waveguides are used\nto improve device performance further. Photonic crystals are of particular interest, as they\nallow the fabrication of a wide variety of structures, including high Q-factor cavities and\nslow light waveguides.\nThe high scattering loss of photonic crystal waveguides, caused by fabrication disorder,\nhowever, has so far proven to be the limiting factor for device applications. In this thesis, I\npresent a detailed study of propagation loss in slow light photonic crystal waveguides.\nI examine the dependence of propagation loss on the group index, and on disorder, in\nmore depth than previous work by other authors. I present a detailed study of the relative\nimportance of different components of the propagation loss, as well as a calculation method\nfor the average device properties.\nA new calculation method is introduced to study different device designs and to show that\nphotonic crystal waveguide propagation loss can be reduced by device design alone. These\n“loss engineered” waveguides have been used to demonstrate the lowest loss photonic crystal\nbased delay line (35 dB/ns) with further improvements being predicted (< 20 dB/ns).\nNovel fabrication techniques were investigated, with the aim of reducing fabrication\ndisorder. Initial results showed the feasibility of a silicon anneal in a nitrogen atmosphere,\nhowever poor process control led to repeatability issues.\nThe use of a slow-fast-slow light interface allowed for the fabrication of waveguides spanning multiple writeﬁelds of the electron-beam lithography tool, overcoming the problem of\nstitching errors.\nThe slow-fast-slow light interfaces were combined with loss engineering waveguide designs, to achieve an order of magnitude reduction in the propagation loss compared to a W1\nwaveguide, with values as low as 130 dB/cm being achieved for a group index around 60.
Designing holographic optical elements (1977)

This item was digitized from a paper original and/or a microfilm copy. If you need higher-resolution images for any content in this item, please contact us at repository@u.library.arizona.edu.
The pattern of restenosis and vascular remodelling after cold-end adioactive stent implantation (2001)

Cold-end stenting results in increased neointimal hyperplasia in in-stent non-radioactive segments.
Flight director guidance throughout the parabolic maneuver (2003)

The high precision required to maintain constant acceleration during the parabolic micro-gravity condition makes the pilot's control task difficult: the optimization of the duration requires an accurate entry into the parabola at the right moment, while the aircraft limitations may not be exceeded. To resolve this problem, flight director control laws incorporating a gain scheduler, a predictor, and a sequencer have been developed to improve the quality and duration of the parabolic maneuver and to increase the safety by monitoring the progress of the maneuver. A flight simulation program was then used to evaluate the flight director system in a fixed-based simulation, and to train the test pilot. Finally, the flight director was evaluated during flight tests with the laboratory aircraft. A considerable improvement to maintaining the precision of micro-gravity conditions was obtained. The development and design of the flight director system, as well as its experimental evaluation, are discussed.
Practical considerations for noise power spectra estimation for clinical CT scanners (2016)

Local noise power spectra (NPS) have been commonly calculated to represent the noise properties of CT imaging systems, but their properties are significantly affected by the utilized calculation schemes. In this study, the effects of varied calculation parameters on the local NPS were analyzed, and practical suggestions were provided regarding the estimation of local NPS for clinical CT scanners. The uniformity module of a Catphan phantom was scanned with a Philips Brilliance 64 slice CT simulator with varied scanning protocols. Images were reconstructed using FBP and iDose4 iterative reconstruction with noise reduction levels 1, 3, and 6. Local NPS were calculated and compared for varied region of interest (ROI) locations and sizes, image background removal methods, and window functions. Additionally, with a predetermined NPS as a ground truth, local NPS calculation accuracy was compared for computer simulated ROIs, varying the aforementioned parameters in addition to ROI number. An analysis of the effects of these varied calculation parameters on the magnitude and shape of the NPS was conducted. The local NPS varied depending on calculation parameters, particularly at low spatial frequencies below ~ 0.15 mm-1. For the simulation study, NPS calculation error decreased exponentially as ROI number increased. For the Catphan study the NPS magnitude varied as a function of ROI location, which was better observed when using smaller ROI sizes. The image subtraction method for background removal was the most effective at reducing low-frequency background noise, and produced similar results no matter which ROI size or window function was used. The PCA background removal method with a Hann window function produced the closest match to image subtraction, with an average percent difference of 17.5%. Image noise should be analyzed locally by calculating the NPS for small ROI sizes. A minimum ROI size is recommended based on the chosen radial bin size and image pixel dimensions. As the ROI size decreases, the NPS becomes more dependent on the choice of background removal method and window function. The image subtraction method is most accurate, but other methods can achieve similar accuracy if certain window functions are applied. All dependencies should be analyzed and taken into account when considering the interpretation of the NPS for task-based image quality assessment.
Size of Cortical Bone and Relationship to Bone Mineral Density Assessed by Quantitative Computed Tomography Image Segmentation (1993)

Louis O, van den Winkel P, Covens P, Schoutens A, Osteaux M. Size of cortical bone and relationship to bone density assessed by quantitative computed tomography image segmentation. Invest Radiol 1993;28:802-805. rationale and objectives. The accuracy of the measurement of the size of cortical bone on computed tomography (CT) images of human vertebrae was evaluated using an automated contour detection and segmentation procedure. methods. Forty human lumbar vertebrae were scanned using 8-mm slices and an automated detection for definition of trabecular and cortical region of interest. The vertebrae were embedded in a polyester resin and 8-mm-thick midvertebral specimens were excised using a diamond circular saw. Contact radiographs of these specimens were performed and, after photograph magnification, the cortical area was measured using computerized planimetry. results. Cortical area measured on CT images was highly correlated with the area measured by planimetry on the specimens (r = .91;P< .001) with, however, a systematic overestimation. A significant relationship was found between density and width of the cortex (r = .56;P< .001). conclusions. Computed tomography is able to assess the size of cortical bone in human vertebrae, but a threshold detection algorithm, as used in the current study, is not adequate to obtain the precise anatomic dimensions.
Gas chromatography-mass spectrometry of trimethylsilyl derivatives of amines. (1979)

The fragmentation of twenty kinds of trimethylsilyl derivatives of amines upon electron impact is studied for the possibility of ultramicrodetermination and selective identification of amines by mass fragmentography. In addition, the selective identification of trimethylsilyl derivatives of amino acids and amines in their mass spectra is also examined. The results obtained in this study indicated that the selective identification and ultramicrodetermination of amines by mass fragmentography will be possible by monitoring the intense ion such as m/e 174. The m/e 147 ion is observed for the amines which have O-trimethylsilyl group. Both ions at m/e 147 and 59 are useful for the selective identification of amino acids and amines in their mass spectra. It is not always true that the ion at m/e 147 indicates the presence of O-trimethylsilyl group, considering from the results that this ion is observed for N-trimethylsilyl n-butyl esters and N-trimethylsilyl l-menthyl esters of amino acids.
Funnel libraries for real-time robust feedback motion planning (2017)

We consider the problem of generating motion plans for a robot that are guaranteed to succeed despite uncertainty in the environment, parametric model uncertainty, and disturbances. Furthermore, we consider scenarios where these plans must be generated in real time, because constraints such as obstacles in the environment may not be known until they are perceived (with a noisy sensor) at runtime. Our approach is to pre-compute a library of “funnels” along different maneuvers of the system that the state is guaranteed to remain within (despite bounded disturbances) when the feedback controller corresponding to the maneuver is executed. We leverage powerful computational machinery from convex optimization (sums-of-squares programming in particular) to compute these funnels. The resulting funnel library is then used to sequentially compose motion plans at runtime while ensuring the safety of the robot. A major advantage of the work presented here is that by explicitly taking into account the effect of uncertainty, the robot can evaluate motion plans based on how vulnerable they are to disturbances. We demonstrate and validate our method using extensive hardware experiments on a small fixed-wing airplane avoiding obstacles at high speed (~12 mph), along with thorough simulation experiments of ground vehicle and quadrotor models navigating through cluttered environments. To our knowledge, these demonstrations constitute one of the first examples of provably safe and robust control for robotic systems with complex nonlinear dynamics that need to plan in real time in environments with complex geometric constraints.
PRIVATE VS. PUBLIC WAREHOUSING: AN ECONOMIC ANALYSIS (1974)

Presents an industry viewpoint of the advantages and disadvantages of using private versus public warehousing in the food processing industry.
O-178 (2012)

School of Public Health, The University of Hong Kong, Hong Kong, Hong Kong, [email protected] School of Public Health, The University of Hong Kong, Hong Kong, Hong Kong School of Public Health, The University of Hong Kong, Hong Kong, Hong Kong School of Public Health, The University of Hong Kong, Hong Kong, Hong Kong
A mutation in the DNA-binding domain of the androgen receptor gene causes complete testicular feminization in a patient with receptor-positive androgen resistance. (1991)

Androgen resistance is associated with a wide range of quantitative and qualitative defects in the androgen receptor. However, fibroblast cultures from approximately 10% of patients with the clinical, endocrine, and genetic features characteristic of androgen resistance express normal quantities of apparently normal androgen receptor in cultured genital skin fibroblasts (receptor-positive androgen resistance). We have analyzed the androgen receptor gene of one patient (P321) with receptor-positive, complete testicular feminization and detected a single nucleotide substitution at nucleotide 2006 (G----C) within the second "zinc finger" of the DNA-binding domain that results in the conversion of the arginine residue at position 615 into a proline residue. Introduction of this mutation into the androgen receptor cDNA and transfection of the expression plasmid into eukaryotic cells lead to the synthesis of a receptor protein that displays normal binding kinetics but is inactive in functional assays of receptor activity. We conclude that substitution mutations in the DNA-binding domain of the androgen receptor are one cause of "receptor-positive" androgen resistance.
Out of the Window: A Multi-Medium (1992)

This paper informally describes a presentation model for multiple media. In contrast to the display platform provided by standard window managers, this model supports richly structured media of high granularity with a wide range of visualisations and with few geometric restrictions. The full formal model (Took 1991c) also integrates graphical and textual media by allowing their arbitrary nesting without imposing a priority between them. In the implemented system Presenter, described here, the model is an objective structure which can be constructed dynamically and incrementally, and so can act as an interactive communication intermediary between users and applications. Such a presentation module is called a surface. A major benefit is that the user can directly manipulate surface objects independently of the application which created them. Such surface interaction factors a large proportion of the task of writing highly interactive applications. The UMA architecture (Took 1991b) describes how this can be achieved without sacrificing semantic feedback from the application to the surface.
Local Radiation Therapy of B16 Melanoma Tumors Increases the Generation of Tumor Antigen-Specific Effector Cells That Traffic to the Tumor (2005)

Immunotherapy of cancer is attractive because of its potential for specificity and limited side effects. The efficacy of this approach may be improved by providing adjuvant signals and an inflammatory environment for immune cell activation. We evaluated antitumor immune responses in mice after treatment of OVA-expressing B16-F0 tumors with single (15 Gy) or fractionated (5 x 3 Gy) doses of localized ionizing radiation. Irradiated mice had cells with greater capability to present tumor Ags and specific T cells that secreted IFN-gamma upon peptide stimulation within tumor-draining lymph nodes than nonirradiated mice. Immune activation in tumor-draining lymph nodes correlated with an increase in the number of CD45(+) cells infiltrating single dose irradiated tumors compared with nonirradiated mice. Similarly, irradiated mice had increased numbers of tumor-infiltrating lymphocytes that secreted IFN-gamma and lysed tumor cell targets. Peptide-specific IFN-gamma responses were directed against both the class I and class II MHC-restricted OVA peptides OVA(257-264) and OVA(323-339), respectively, as well as the endogenous class I MHC-restricted B16 tumor peptide tyrosinase-related protein 2(180-188). Adoptive transfer studies indicated that the increased numbers of tumor Ag-specific immune cells within irradiated tumors were most likely due to enhanced trafficking of these cells to the tumor site. Together these results suggest that localized radiation can increase both the generation of antitumor immune effector cells and their trafficking to the tumor site.
Oxidation Mechanism of Copper at 623-1073 K (2002)

In reviewing the results reported for copper oxidation at intermediate temperatures from 573 to 1173 K, the oxidation mechanism at the lower part of this temperature range and the reason for the change in activation energy with decreasing the temperature remain unclear. To make it clear, copper oxidation is studied at 623–1073 K under 0.1 MPa O2 using a commercial 99.9999% pure copper. The oxidation kinetics is essentially parabolic, and the activation energy decreases from 111 kJ/mol at 873–1073 K to 40 kJ/mol at 623–773 K . The growth of Cu2O is predominant and it obeys the parabolic law at 623–773 K, as well as the case at 873–1073 K . In addition to grain boundary diffusion of copper along the fine and thin columnar Cu2O grains, the non-protective CuO whisker layer, which cannot keep the oxygen potential constant at the Cu2O/CuO interface, should be responsible for the decrease in the activation energy at 623–773 K.
TigerQuoll (2013)

JavaScript, the most popular language on the Web, is rapidly moving to the server-side, becoming even more pervasive. Still, JavaScript lacks support for shared memory parallelism, making it challenging for developers to exploit multicores present in both servers and clients. In this paper we present TigerQuoll, a novel API and runtime for parallel programming in JavaScript. TigerQuoll features an event-based API and a parallel runtime allowing applications to exploit a mutable shared memory space. The programming model of TigerQuoll features automatic consistency and concurrency management, such that developers do not have to deal with shared-data synchronization. TigerQuoll supports an innovative transaction model that allows for eventual consistency to speed up high-contention workloads. Experiments show that TigerQuoll applications scale well, allowing one to implement common parallelism patterns in JavaScript.
A Rechargeable Battery Employing a Reduced Polyacetylene Anode and a Titanium Disulfide Cathode (1984)

Novel rechargeable battery cells have been constructed using a reduced form of the conducting organic polymer, polyacetylene, as the anode, the inorganic intercalating material, titanium disulfide as the cathode, and either in THF or in THF as the nonaqueous electrolyte. A feasibility study of the cells is described. It includes constant current discharge characteristics, stability, and rechargeability. The cells exhibited good stability and reversibility. Their performance was cathode limited, owing to the method used for fabricating the electrode.