gebhart/patrepeval huggingface dataset:
A new measurement technique for monitoring inorganic scale deposition (2023)

Scale formation is one of the many challenges for flow assurance in the oil and gas industry in deep water oilfields. This work focuses on the development of a new technique for inorganic scale monitoring based on electrical measurements. Experiments were carried out using synthetic water with the composition of a pre-salt Brazilian oilfield. Two different methodologies were applied for fouling formation. The results showed that the multiple-batch methodology increased the content of inorganic deposits on the electrodes, improving the output signal decay analysis of the system. Scanning electron microscopy with energy-dispersive spectroscopy (SEM–EDS) studies was used to validate the presence of fouling deposits, corroborating the sensor's detection efficiency. The spatial distribution of the main scaling chemical elements was also demonstrated by SEM–EDS analysis across the batches. In addition, the effects of temperature and electrode surface orientation were determined. The decay of the sensor output signal increased for higher temperatures (80 °C and 60 °C) compared to 40 °C due to the reduced solubility of CaCO3. For the horizontal position of the electrodes, measurements of the sensor and SEM analysis revealed a greater accumulation of fouling compared to the vertical position.
Minimizing energy demand and environmental impact for sustainable NH3 and H2O2 production—A perspective on contributions from thermal, electro-, and photo-catalysis (2020)

There is an urgent need to provide adequate and sustainable supplies of water and food to satisfy the demand of an increasing population. Catalysis plays important roles in meeting these needs by facilitating the synthesis of hydrogen peroxide that is used in water decontamination and chemicals production, and ammonia that is used as fertilizer. However, these chemicals are currently produced with processes that are either very energy-intensive or environmentally unfriendly. This article offers the perspectives of the challenges and opportunities in the production of these chemicals, focusing on the roles of catalysis in more sustainable, alternative production methods that minimize energy consumption and environmental impact. While not intended to be a comprehensive review, the article provides a critical review of selected literature relevant to its objectives, discusses areas needed for further research, and potential new directions inspired by new developments in related fields. For each chemical, production by thermal, electro-, and photo-excited processes are discussed. Problems that are common to these approaches and their differences are identified and possible solutions suggested.
Development of a New Patient-Reported Outcome Measure for Breast Surgery: The BREAST-Q (2009)

The BREAST-Q can be used to study the impact and effectiveness of breast surgery from the patient's perspective. By quantifying satisfaction and important aspects of health-related quality of life, the BREAST-Q has the potential to support advocacy, quality metrics, and an evidence-based approach to surgical practice.
Farm building design and animal heat losses (1980)

Studying heat emission from livestock is not a common feature of building research work. Yet knowledge of animal heat losses is as important to designing farm buildings as knowledge of human thermal response is to the design of buildings for people. This thermotechnical work has become highly specialised in Denmark, leading to published heat losses for cattle, pigs and poultry, explained here by a research engineer at the Danish Building Research Institute's Farm Buildings Section.
Lemongrass (Cymbopogon citratus) essential oil as affected by drying methods (2012)

The leaves of lemongrass (Cymbopogon citratus) were dried using three different drying methods (sun-drying for 36 h, shade-drying for 48 h and oven-drying at 45 °C for 7 h). The essential oil was obtained by hydro-distillation of the leaves dried by every treatment, and was analyzed by capillary GC and GC/mass instruments. Statistical analysis showed significant differences in the essential oil content of leaves dried by different drying methods. Oven drying gave the highest essential oil percentage (2.45%) compared to shade-drying (2.12%) and sun-drying methods (2.10%). Eighteen components were identified in the essential oil of fresh and dried C. citratus leaves obtained by different drying methods, including geranial (citral-a), neral (citral-b) and myrcene as main components. The drying methods had a marked effect on the proportion of the various components.
Effects of Synchronized Leg Motion in Walk-in-Place Utilizing Deep Neural Networks for Enhanced Body Ownership and Sense of Presence in VR (2020)

We investigate the effects of different ways of visualizing the virtual gait of the avatar in the context of Walk-in-Place (WIP) based navigation in a virtual environment (VE). In Study 1, participants navigated through a VE using the WIP method while inhabiting an avatar. We varied the visualization of the avatar’s leg motion while performing the WIP gesture: (1) Fixed Body: the legs stood still; (2) Pre-recorded Animation: the legs moved in a fixed predetermined pace (plausible but not in accordance to that of the user in general); (3) Synchronized Motion the legs moved according (synchronized) to those of the user. Our results indicated that the sense of presence and body ownership improved significantly when the leg motion was rendered synchronized to that of the user (Synchronized Motion). In addition, we developed a deep neural network (DNN) that predicted the users’ leg postures only with the head position tracking, eliminating the need for any external sensors. We carried out Study 2, to assess the effects of different gait visualizations, under two new factors: (1) virtual gait seen directly by the user looking down, or already visible by one’s shadow (i.e., no need to look down); and (2) playing a pre-recorded animation, or pre-recorded animation whose playback speed was adjusted to match with pace of the users’ actual leg motions as predicted by the DNN. The results of Study 2 showed that the virtual gait temporally synchronized with that of the user greatly improved the sense of body ownership, whether it was witnessed directly or indirectly with the shadow. However, the effect of virtual gait on presence was less marked when indirectly observed. We discuss our findings and the implications for representing the avatar locomotion in immersive virtual environments.
Compile-time Optimization of Dynamic Hardware Reconfigurations. (1999)

Recent generations of Field Programmable Gate Arrays (FPGA) allow the dynamic reconfiguration of cells on the chip during run-time. For a given problem consisting of a set of tasks with computation requirements modeled by rectangles of cells, several optimization problems such as finding the array of minimal size to accomplish the tasks within a given time limit are considered. Existing approaches based on ILP formulations to solve these problems being related to multi-dimensional packing problems turn out not to be applicable for problem sizes of interest. Here, a breakthrough is achieved in solving these problems to optimality by using a new notion of packing classes that allows a significant reduction of the search space such that above problems may be solved exactly using a special branchand -bound technique. We validate the usefulness of our method by providing computational results. Keywords: reconfigurable hardware, multidimensional placement and packing 1 Introduction Field-...
Comparison of the Effects of Methyl and Chloro Substituted Salicylate Counterions on Drag Reducing and Rheological Behaviors and Microstructures of Cationic Surfactants (1998)

The chemical structure of the counterion affects the effectiveness of a cationic surfactant as a drag reducer, its rheological behavior and its micro structure. With the addition of certain negatively charged counterions, worm-like micelles can be formed. This worm-like micelle structure has been proposed as necessary for a surfactant solution to be drag reducing. Recently, however, we reported the first drag reducing system with a vesicle-dominated microstructure (Lin et al., 1997). The system was 5.0mM Arquad 16-50 (commercial CTAC) with 5.0mM 5-chlorosalicylate. This solution has a short swirl decay time but it has near zero first normal stress difference at 20 to 1000s−1 shear rates. In this paper, drag reduction, rheological properties, and microstructures from cryo-TEM imaging are described for Arquad 16-50 with 4-chlorosalicylate, 3-methylsalicylate, 4-methylsalicylate, and 5-methylsalicylate counterions, all at concentrations of 5.0mM Arquad 16-50/ 5.0mM counterion and they are compared with earlier results with 5-chlorosalicylate.
Using human immunodeficiency virus type 1 sequences to infer historical features of the acquired immune deficiency syndrome epidemic and human immunodeficiency virus evolution (2001)

In earlier work, human immunodeficiency virus type 1 (HIV-1) sequences were analysed to estimate the timing of the ancestral sequence of the main group of HIV-1, the virus that is responsible for the acquired immune deficiency syndrome pandemic, yielding a best estimate of 1931 (95% confidence interval of 1915-1941). That work will be briefly reviewed, outlining how phylogenetic tools were extended to incorporate improved evolutionary models, how the molecular clock model was adapted to incorporate variable periods of latency, and how the approach was validated by correctly estimating the timing of two historically documented dates. The advantages, limitations, and assumptions of the approach will be summarized, with particular consideration of the implications of branch length uncertainty and recombination. We have recently undertaken new phylogenetic analysis of an extremely diverse set of human immunodeficiency virus envelope sequences from the Democratic Republic of the Congo (the DRC, formerly Zaire). This analysis both corroborates and extends the conclusions of our original study. Coalescent methods were used to infer the demographic history of the HIV-1 epidemic in the DRC, and the results suggest an increase in the exponential growth rate of the infected population through time.
Clinical Evaluation of Computerized Tomographic Mammography (1977)

This is an initial report of the first clinical study using computerized tomographic mammography (CTM). A study is being conducted comparing CTM and conventional mammographic techniques in patients who subsequently undergo breast biopsy. This report analyzes the experience with 160 breast lesions found in patients who were examined using CTM without contrast material. One hundred lesions were benign and 60 were malignant. Mammography correctly identified 54 of the malignant lesions while CTM identified 41. Five lesions were missed by both modalities. The report also analyzes results experienced with 79 lesions found in patients who were examined with CTM both before and after the intravenous injection of contrast material. Forty-six of these lesions were benign and 33 were malignant. Mammography correctly identified 28 of the malignant lesions while CTM identified 27. Only one lesion was missed by both modalities. It is planned to continue this study, especially to enlarge our experience with the use of contrast material in breast scanning.
<title>Review of intelligent video surveillance with single camera</title> (2012)

Intelligent video surveillance has found a wide range of applications in public security. This paper describes the state-of- the-art techniques in video surveillance system with single camera. This can serve as a starting point for building practical video surveillance systems in developing regions, leveraging existing ubiquitous infrastructure. In addition, this paper discusses the gap between existing technologies and the requirements in real-world scenario, and proposes potential solutions to reduce this gap.
Antenna pointing systematic error model derivations (1987)

The pointing model used to represent and correct systematic errors for the Deep Space Network (DSN) antennas is presented. Analytical expressions are given in both azimuth-elevation (az-el) and hour angle-declination (ha-dec) mounts for RF axis collimation error, encoder offset, nonorthogonality of axes, axis plane tilt, and structural flexure due to gravity loading. While the residual pointing errors (rms) after correction appear to be within the ten percent of the half-power beamwidth criterion commonly set for good pointing accuracy, the DSN has embarked on an extensive pointing improvement and modeling program aiming toward an order of magnitude higher pointing precision.
Multiprocessor 3D sound system (2002)

Traditionally, the reproduction of three dimensional audio has been constrained to the use of headphones. Recent progress has allowed the reproduction of 3-D audio through conventional speakers. However, these methods place severe constraints in the position of the listener and the speakers. This paper discusses a new developed system that allows greater freedom in the placement of the speakers without degrading the degree of freedom in the listener's position. It also describes the implementation of a real-time multiprocessor 3-D sound system based on Analog Devices ADSP-2181 processors. A Windows based program is used to control the real-time system using the PC's serial and parallel ports. A 3-D audio system is composed of a binaural spatializer and a crosstalk cancellation. The binaural spatializer allows the placement of virtual sound sources around the listener's head. This is done by convolving the input sound signals with filters that simulate the transmission path from a desired source position in free field to the listeners two ears. The binaural sounds that results from the binaural spatializer are perceived as coming from the desired position, and must be presented using headphones. In order to present binaural sounds using conventional speakers, a crosstalk cancellation system must be used. The crosstalk cancellation system cancels the contribution of each speaker to the opposite side ear (i.e, contribution of left speaker to the right ear). The result is a pair of uncorrelated binaural sound signals, where each speaker only contributes to the same side ear.
The Influence of HPT Forward Disc Cavity Platform Axial Overlap Geometry on Mainstream Ingestion (2012)

In this paper, 3D unsteady and mixing plane CFD simulations including the mainstream full stage on two tested configurations plus a third cavity geometry variance are reported. The sector models were run at test conditions and compared with the corresponding matched Network 1-D flow model to derive the sensitivity of HPT stage forward disc cavity platform axial overlap geometry and supplied purge flow to cavity ingestion dynamics. The first configuration includes no axial overlap (i.e. ΔX/ΔR = 0); the second configuration increases axial overlap by 70% (ΔX/ΔR = 1.82); the third configuration has a larger rim cavity axial spacing and a smaller platform axial overlap (i.e. ΔX/ΔR = 1.67). The unsteady and mixing plane 3D CFD models of the three configurations are run across supplied purge flows ranging from nominal to 35% of the nominal. This was done to obtain a good comparison and to justify the need for unsteady solutions in disc cavity ingestion studies. For each configuration, the CFD predicted mainstream pressure pulse decay profile inside the cavity along with absolute, relative, and static temperatures related to the amount of ingestion that mixes with the supplied flow at several radial heights in the cavity are extracted on a time-averaged and pitch-wise averaged basis. The applied CFD-Network process yields cavity sealing effectiveness versus supplied purge flow and validates platform conductance factors used in 1-D Network flow model. In particular, the unsteady CFD results for the tested configurations were able to reproduce the Network-matched rim cavity effectiveness data at the critical location more closely. The sensitivity results indicate that although, the zero overlap geometry (configuration-1) has insufficient purge flow as evident by the low upper cavity effectiveness, the amount becomes sufficient as the platform axial overlap increases for configuration-2. The influence of increasing rim cavity axial spacing (configuration-3) allows for the same effectiveness to be achieved under a smaller platform axial overlap and lower purge flow supply.
Hydroxy Derivatives of Diamantane, Triamantane, and [121]Tetramantane: Selective Preparation of Bis‐Apical Derivatives (2007)

Abstract Functionalizations of diamantane, triamantane, and tetramantane with electrophilic reagents (Br 2 , nitric acid) lead to various apical and medial disubstituted products that were separated and characterized individually. The highly desirable and otherwise inaccessible thermodynamically more stable apical bis‐derivatives were obtained with high preparative yields through acid catalyzed isomerizations. (© Wiley‐VCH Verlag GmbH &amp; Co. KGaA, 69451 Weinheim, Germany, 2007)
The Compositing Buffer: A Flexible Method for Image Generation and Image Editing (1995)

Abstract In this paper, we describe a new buffer architecture called the Compositing Buffer. Although it is based on the A‐buffer architecture described by Carpenter 1 , the new architecture introduces two important ideas which make image generation more flexible. The first idea is the storing of bitmask index instead of the bitmask. This allows accurate images to be generated while at the same time, minimising memory usage. The second idea is the introduction of the concept of dynamic object. This allows images to be edited interactively. Applications of the two ideas will also be discussed in the paper.
Intermezzo Implementation Notes (1993)

A collaboration support environment is a software system which developers can build on top of to provide more robust and flexible collaborative operations. This paper describes the architecture of the Intermezzo collaboration support environment. Intermezzo is a set of libraries, servers, and conventions which developers can use to construct collaborative applications.&#13;\n&#13;\n&#13;\nIntermezzo does not attempt to provide support for all aspects of collaborative software development. Instead, it restricts itself to providing support for the sharing of "facilitating data." Facilitating data is data which is used by applications and the collaboration support environment itself to facilitate the process of collaboration. An example of facilitating data is information about which users are currently active in collaborations.&#13;\n&#13;\n&#13;\nFacilitating data is distinct from artifacts. Artifacts are the actual data of discourse or concern of the collaborative process. As an example, the text document which is edited by a shared word processor is an artifact. Intermezzo does not provide facilities to support the sharing and use of artifacts.
Vaccination Strategies During Shortages of Yellow Fever Vaccine (2018)

Our website uses cookies to enhance your experience. By continuing to use our site, or clicking "Continue," you are agreeing to our Cookie Policy | Continue JAMA HomeNew OnlineCurrent IssueFor Authors Podcasts Clinical Reviews Editors' Summary Medical News Author Interviews More Publications JAMA JAMA Network Open JAMA Cardiology JAMA Dermatology JAMA Health Forum JAMA Internal Medicine JAMA Neurology JAMA Oncology JAMA Ophthalmology JAMA Otolaryngology–Head & Neck Surgery JAMA Pediatrics JAMA Psychiatry JAMA Surgery Archives of Neurology & Psychiatry (1919-1959) JN Learning / CMESubscribeJobsInstitutions / LibrariansReprints & Permissions Terms of Use | Privacy Policy | Accessibility Statement 2023 American Medical Association. All Rights Reserved Search All JAMA JAMA Network Open JAMA Cardiology JAMA Dermatology JAMA Forum Archive JAMA Health Forum JAMA Internal Medicine JAMA Neurology JAMA Oncology JAMA Ophthalmology JAMA Otolaryngology–Head & Neck Surgery JAMA Pediatrics JAMA Psychiatry JAMA Surgery Archives of Neurology & Psychiatry Input Search Term Sign In Individual Sign In Sign inCreate an Account Access through your institution Sign In Purchase Options: Buy this article Rent this article Subscribe to the JAMA journal
Light-adaptable display for the future advertising service (2016)

In this paper, a new light-adaptable display (LAD) structure with minimum power consumption is proposed for the future advertising service, and the demonstrated results are reported. An organic light-emitting diode with color reflection (colored OLED) was applied for the reflective- and emissive-mode device, and a guest-host liquid-crystal device (GH-LC) was adopted for the light shutter device. The current efficiency and reflectance of the colored OLED were 35.15 cd/A at 457 cd/m2 luminance and 63% for the yellow color, respectively. The measured contrast ratio of GH-LC was 15.5:1 at dark-room conditions, respectively. Transparent oxide thin-film transistors were used for the backplane, and their average mobility was 9.08 cm2/V s, with a 0.5 standard deviation. Through the optimization of the fabrication process and the structures of each device, the LAD adaptively operating according to the environmental illuminance from dark to 10,000 nits was successfully demonstrated. Moreover, a new LAD driving method was proposed for minimizing the power consumption.
Monoclonal antibodies: the possibilities for cancer therapy. (1984)

Previous studies and current efforts to use monoclonal antibodies in human cancer therapy are reviewed. These include antibody-dependent immune reactions in vivo, conjugation of cytotoxic agents to monoclonal antibodies, and monoclonal antibody-mediated tumor cell elimination from bone marrow in vitro for use in autologous bone marrow transplantation. Our studies describe the use of magnetic immunocolloids for the removal of leukemic cells from human bone marrow. Future possibilities for the therapeutic use of monoclonal antibodies are also discussed.
A streptavidin-metallothionein chimera that allows specific labeling of biological materials with many different heavy metal ions. (1992)

We have designed a streptavidin-metallothionein chimeric protein in which the streptavidin moiety provides a means of binding the metallothionein moiety tightly to specific biological targets. A gene fusion of streptavidin with mouse metallothionein I was efficiently expressed in Escherichia coli, and the expressed chimeric protein was purified to homogeneity by a simple procedure. The purified chimera, consisting of four identical subunits, bound one biotin and approximately seven Cd2+ ions per subunit (19.5 kDa). This indicates that both the streptavidin and the metallothionein moieties are fully functional. The high binding affinity of the chimera both for biotin and for heavy metal ions allows the specific labeling or conjugation of any biological material containing unhindered biotin with a variety of different heavy metal ions and their isotopes, thereby opening the way for simultaneous assay systems for a large number of biological targets.