gebhart/patrepeval huggingface dataset:
High-precision pouring control using online model parameters identification in automatic pouring robot with cylindrical ladle (2014)

This paper gives an advanced control system in tilting-ladle-type automatic pouring robot in casting industry. In recent years, an automatic pouring robot has been exploited to improve the working environment of the pouring process and to produce stable casting products. Furthermore, the automated pouring process has been required that molten metal is quickly and precisely poured into the mold. However, the conventional control systems of the pouring robot need the preliminary experiments for tuning the control parameters. These experiments take an immense amount of time and effort. Moreover in case that the pouring conditions are changed from the conditions of the preliminary experiments, it is difficult to pour precisely the molten metal by the pouring robot with the conventional control systems. Therefore, we propose the pouring control system which control parameters are automatically tuned for pouring precisely in this study. In this proposed approach, the online model parameters identification and control parameters updating system are integrated with the pouring control system based 011 the mathematical model of the pouring process. These model parameters are identified automatically by minimizing the error of practical data and the simulation data from the model at every pouring motion, and then the control parameters according to the mathematical model of the pouring process are updated online to the controller. Therefore, even if the pouring conditions are changed, the molten metal is poured precisely by the proposed pouring control system. The effectiveness of the proposed pouring control system is verified by the experiments with the tilting-ladle-type automatic pouring robot.
Analysis of a Cone-Based Distributed Topology Control Algorithm for Wireless Multi-hop Networks (2002)

The topology of a wireless multi-hop network can be controlled by varying the transmission power at each node. In this paper, we give a detailed analysis of a cone-based distributed topology control algorithm. This algorithm, introduced in [16], does not assume that nodes have GPS information available; rather it depends only on directional information. Roughly speaking, the basic idea of the algorithm is that a node $u$ transmits with the minimum power $p_{u,α}$ required to ensure that in every cone of degree $α$ around $u$, there is some node that $u$ can reach with power $p_{u,α}$. We show that taking $α= 5π/6$ is a necessary and sufficient condition to guarantee that network connectivity is preserved. More precisely, if there is a path from $s$ to $t$ when every node communicates at maximum power, then, if $α<= 5π/6$, there is still a path in the smallest symmetric graph $G_α$ containing all edges $(u,v)$ such that $u$ can communicate with $v$ using power $p_{u,α}$. On the other hand, if $α> 5π/6$, connectivity is not necessarily preserved. We also propose a set of optimizations that further reduce power consumption and prove that they retain network connectivity. Dynamic reconfiguration in the presence of failures and mobility is also discussed. Simulation results are presented to demonstrate the effectiveness of the algorithm and the optimizations.
Diaphragm for an electroacoustic transducer (1984)

First Page
MESOSCALE BIOTRANSFORMATIONS OF URANIUM IN SEDIMENTS AND SOILS (Program Element: Biogeochemistry) (2008)

In-situ bioreduction is being considered as a remediation strategy for uranium (U) contaminated sediments because of its potentially low cost, and because short-term studies support its feasibility. However, any in-situ approach for immobilizing U will require assurance of either permanent fixation, or of very low release rates into the biosphere. Our long-term laboratory studies have shown that reoxidation of bioreduced UO{sub 2} can occur even under reducing (methanogenic) conditions sustained by continuous infusion of lactate. The biogeochemical processes underlying this finding need to be understood. Our current research is designed to identify mechanisms responsible for anaerobic U oxidation, and identify effects of key factors controlling long-term stability of bioreduced U. These include: (1) effects of organic carbon (OC) concentrations and supply rates on stability of bioreduced U, (2) influences of pH on U(IV)/U(VI) redox equilibrium, (3) the roles of Fe- and Mn-oxides as potential U oxidants in sediments, and (4) the role of microorganisms in U reoxidation. Findings from some of these studies are summarized here.
Verification of time telegrams in Long Wave Radio systems (2015)

This paper describes a method to verify received time telegrams distributed by Long Wave Radio systems for the example of the radio ripple control technology .In the given approach, the time between two time telegrams is continuously measured and compared with the time difference calculated from the time information contained in the telegrams. In other words, physical and logical information is compared. The physical time difference is directly calculated using the carrier frequency of the transmission system (for example: DCF49 transmission system uses a carrier frequency of 129.1 kHz with FSK modulation). A counter is clocked using the received carrier frequency of the system. The physical time difference between the transmissions of two time telegrams can be derived from the number of carrier cycles. The logical time difference is given by the content of the time telegrams. The comparison of physical and logical time differences is continuously verified to detect time jumps, which may appear during the transmission of time telegrams. Therefore, manipulated or delayed time telegrams can be accurately identified. This method can be applied without changing the time distribution protocol and it can be adapted to other time distribution services.
Mechanistic Positron Emission Tomography Studies: Demonstration of a Deuterium Isotope Effect in the Monoamine Oxidase‐Catalyzed Binding of [<sup>11</sup>C]l‐Deprenyl in Living Baboon Brain (1988)

Abstract: The application of positron emission tomography (PET) to the study of biochemical transformations in the living human and animal body requires the development of highly selective radiotracers whose concentrations in tissue provide a record of a discrete metabolic process. l‐ N ‐[ 11 C‐ methyl ]Dtprtnyl ([ 11 C]l‐deprenyl), a suicide inactivator of monoamine oxidase (MAO) type B, has been developed as a radiotracer for mapping MAO B in the living human and animal brain. In this investigation, [ 11 C]l‐deprenyl (1) and [ 11 C]l‐deprenyl‐α,α‐ 2 H 2 (2) have been compared in three different baboons by PET measurement of carbon‐11 uptake and retention in the brain and the measurement of the amount of unchanged tracer in the arterial plasma over a 90‐min time interval. For one baboon, N‐[ 11 C‐methyl‐ 2 H 3 ]h‐de‐prenyl (3) was also studied. Kinetic parameters calculated using a three‐compartment model revealed a deuterium isotope effect of 3.8 ± 1.1. Comparison of the two tracers (1 and 2) in mouse brain demonstrated that deuterium substitution significantly reduced the amount of radioactivity bound to protein. HPLC and GLC analysis of the soluble radioactivity in mouse brain after injection of [ 11 C]l‐deprenyl showed the presence of [ 11 C]methamphetamine as a major product along with unidentified labeled products. Sodium dodecyl sulfate‐polyacrylamide electrophoresis with carbon‐14‐labeled l‐deprenyl showed that a protein of molecular weight 58,000 was labeled. These results establish that MAO‐catalyzed cleavage of the α carbon‐hydrogen bond on the propargyl group is the rate limiting (or a major rate contributing) step in the retention of carbon‐11 in brain and that the in vivo detection of labeled products in brain after the injection of [ 11 C]L‐deprenyl provides a record of MAO activity.
Process Development of Halaven®: Synthesis of the C1-C13 Fragment from d-(-)-Gulono-1,4-lactone (2013)

A 12-step kilogram-scale synthesis of the C1–C13 fragment, common to halichondrin B and the totally synthetic analogue Halaven<sup>®</sup> (E7389, INN eribulin mesylate), is described. The synthesis features four crystalline intermediates which facilitates throughput, and enhances quality control of all stereogenic centers in the title compound.
A novel helical slow-wave structure for millimeter-wave traveling-wave tube (2012)

A novel helical slow-wave structure is proposed to develop wide-bandwidth, high-gain, high-power millimeter-wave traveling wave tube. This structure evolves from a conventional helical slow-wave structure with three parallel rectangular or other arbitrarily-shaped slots made in the outside of the helix. In this paper, the electromagnetic characteristics and thermal analysis of this structure are obtained using the finite-element-method. From our calculations, the novel and the conventional structure have similar dispersion characteristics, while the novel structure has higher heat dissipation capability than that of conventional one.
Cooperative Spectrum Sensing for Cognitive Radios under Bandwidth Constraints (2007)

In cognitive radio systems, cooperative spectrum sensing is conducted among the cognitive users so as to detect the primary user accurately. However, when the number of cognitive users tends to be very large, the bandwidth for reporting their sensing results to the common receiver will be very huge. In this paper, the authors employ a censoring method with quantization to decrease the average number of sensing bits to the common receiver. By censoring the collected local observations, only the users with enough information will send their local one bit decisions (0 or 1) to the common receiver. The performance of spectrum sensing is investigated for both perfect and imperfect reporting channels. Numerical results show that the average number of sensing bits decreases greatly at the expense of a little sensing performance loss.
Comparison of Central Macular Fluid Volume With Central Subfield Thickness in Patients With Diabetic Macular Edema Using Optical Coherence Tomography Angiography (2021)

These findings suggest that an automated CMFV is a more accurate diagnostic biomarker than CST for DME and may improve screening for DME.
Farsite (2002)

Farsite is a secure, scalable file system that logically functions as a centralized file server but is physically distributed among a set of untrusted computers. Farsite provides file availability and reliability through randomized replicated storage; it ensures the secrecy of file contents with cryptographic techniques; it maintains the integrity of file and directory data with a Byzantine-fault-tolerant protocol; it is designed to be scalable by using a distributed hint mechanism and delegation certificates for pathname translations; and it achieves good performance by locally caching file data, lazily propagating file updates, and varying the duration and granularity of content leases. We report on the design of Farsite and the lessons we have learned by implementing much of that design.
Per‐Vertex Defocus Blur for Stochastic Rasterization (2012)

Abstract We present user‐controllable and plausible defocus blur for a stochastic rasterizer. We modify circle of confusion coefficients per vertex to express more general defocus blur, and show how the method can be applied to limit the foreground blur, extend the in‐focus range, simulate tilt‐shift photography, and specify per‐object defocus blur. Furthermore, with two simplifying assumptions, we show that existing triangle coverage tests and tile culling tests can be used with very modest modifications. Our solution is temporally stable and handles simultaneous motion blur and depth of field.
Application of compatible dual‐echo arteriovenography in stroke: Preliminary observations (2013)

Compatible dual‐echo arteriovenography (CODEA) is a recent MRI technique for simultaneous acquisition of an MR angiogram (MRA) and MR venogram (MRV) with image quality comparable to conventional single‐echo acquisitions. The purpose of this study was to evaluate the utility of CODEA in imaging patients with chronic stroke and to test the utility of a new image representation technique (“enhanced maximum intensity projection [MIP]") based on tissue segmentation, intensity inversion, and vessel enhancement filtering) for MRV. Arterial and venous abnormalities associated with stroke were delineated on MRA and MRV acquired simultaneously with the CODEA technique. CODEA MRV displayed with the enhanced MIP technique facilitated the visualization of the overall venous structures in 3D. Reduced venous vascularity was detected in the regions of arterial occlusion compared to the contralateral normal brain regions. The CODEA technique along with the enhanced MIP technique may be valuable, particularly in clinical applications that require efficient MRA/MRV imaging because of limited scan time such as in acute stroke. © 2013 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 23, 152–156, 2013
Metamaterials for optical security (2009)

In this letter we introduce the concept of optical security marks based on photonic metamaterials. We propose that a metamaterial with strong negative magnetic activity in the visible wavelength regime can be used to create a security mark that can be incorporated in any object to ensure its authenticity. The sophisticated nanofabrication processes needed to manufacture the metamaterial contribute to avoid counterfeiting. To illustrate the concept, a particular configuration consisting of silver nanohoops is analyzed.
Off-axis spatial localization with frequency modulated nuclear magnetic resonance rotating ( ρ) pulses (1988)

Nuclear magnetic resonance (NMR) rotating ( ρ) pulses produce two-dimensional spatially selective inversion of nuclear magnetization with a single NMR excitation. A technique employing frequency modulation of the excitation waveform is described here for offsetting the sensitive volume defined by these pulses to any preselected location within the sample. The technique is demonstrated in a whole-body 1 H NMR imaging system, and can be used to provide simple, automated relocation or interleaving of selectively excited volumes in NMR imaging and spectroscopy.
Electro-Active Transducer Using Radial Electric Field To Produce/Motion Sense Out-Of-Plane Transducer (2006)

An electro-active transducer includes a ferroelectric material sandwiched by first and second electrode patterns. When the device is used as an actuator, the first and second electrode patterns are configured to introduce an electric field into the ferroelectric material when voltage is applied to the electrode patterns. When the device is used as a sensor. the first and second electrode patterns are configured to introduce an electric field into the ferroelectric material when the ferroelectric material experiences deflection in a direction substantially perpendicular thereto. In each case, the electrode patterns are designed to cause the electric field to: i) originate at a region of the ferroelectric material between the first and second electrode patterns. and ii) extend radially outward from the region of the ferroelectric material (at which the electric field originates) and substantially parallel to the ferroelectric material s plane.
Synthesis, structural characterization, electrochemical behavior and anticancer activity of gold(<scp>iii</scp>) complexes of <i>meso</i>-1,2-di(1-naphthyl)-1,2-diaminoethane and tetraphenylporphyrin (2016)

Gold(<sc>iii</sc>) complexes were tested for <italic>in vitro</italic> antiproliferative activity against three human tumor cell lines. All complexes exhibited remarkable cytotoxicity.
A Context-aware Framework for Detecting Sensor-based Threats on Smart Devices (2019)

Sensors (e.g., light, gyroscope, accelerometer) and sensing-enabled applications on a smart device make the applications more user-friendly and efficient. However, the current permission-based sensor management systems of smart devices only focus on certain sensors and any App can get access to other sensors by just accessing the generic sensor Application Programming Interface (API). In this way, attackers can exploit these sensors in numerous ways: they can extract or leak users' sensitive information, transfer malware, or record or steal sensitive information from other nearby devices. In this paper, we propose 6thSense, a context-aware intrusion detection system which enhances the security of smart devices by observing changes in sensor data for different tasks of users and creating a contextual model to distinguish benign and malicious behavior of sensors. 6thSense utilizes three different Machine Learning-based detection mechanisms (i.e., Markov Chain, Naive Bayes, and LMT). We implemented 6thSense on several sensor-rich Android-based smart devices (i.e., smart watch and smartphone) and collected data from typical daily activities of 100 real users. Furthermore, we evaluated the performance of 6thSense against three sensor-based threats: (1) a malicious App that can be triggered via a sensor, (2) a malicious App that can leak information via a sensor, and (3) a malicious App that can steal data using sensors. Our extensive evaluations show that the 6thSense framework is an effective and practical approach to defeat growing sensor-based threats with an accuracy above 96% without compromising the normal functionality of the device. Moreover, our framework reveals minimal overhead.
Low-cost passive sensors for monitoring corrosion in concrete structures (2011)

A passive sensor platform has been developed at the University of Texas at Austin to monitor corrosion of embedded reinforcement in concrete structures. The sensors are powered and interrogated in a wireless manner. Initial sensor designs used a sacrificial corroding steel wire to indicate the risk of corrosion within concrete. The wire was physically connected to the sensor circuitry and passed through the circuit protection layer. Consequently, it allowed contaminants to reach the circuit electric components causing corrosion and limiting the service life of the sensor. A novel sensor configuration that relies on wireless inductive coupling between a resonant circuit and the transducer element is presented. The non-contact design eliminates the breach concern and enhances the durability of the senor. Preliminary test results of the new design will be discussed in this paper.
Vacuum-Assisted Multistage Membrane Distillation With Bubble Column Dehumidifier for Efficient Water Production (2022)

Abstract An experimental investigation of a novel integrated system of a multistage sweeping gas (air) membrane distillation module and a bubble column dehumidifier (BCD) is presented for an energy-efficient high production water desalination system. The sweeping air stream is created using a vacuum pump installed between the membrane distillation unit and the BCD to apply a degree of vacuum behind the membrane in the air channel of the membrane cell to reduce the vapor mass transfer resistance through the membrane pores. Performance metrics of the system include the measurement of permeate flux and the calculations of energy consumption at various operating conditions in a comprehensive manner. The system performance is mainly controlled by feed temperature and flowrate and the sweeping air flowrate. The dehumidifier water level and its temperature have moderate impacts in the tested ranges. A permeate flux of 18 kg/m2 . h was measured with a relatively high gained output ratio of 0.62, low specific energy consumption of 1120 kWh/m3 when the feed temperature is 80 °C, and the dehumidifier column height of 4.5 cm. The study results revealed an enhanced system’s performance compared to other sweeping gas membrane distillation systems in the literature, which is very promising.
A Linearized Intensity Modulator for Photonic Analog-to-Digital Conversion Using an Injection-Locked Mode-Locked Laser (2014)

A linearized intensity modulator for pulsed light based on an injection-locked mode-locked laser (MLL) is presented here. This has been realized by introducing a monolithic Fabry-Pérot MLL into one of the arms of a conventional Mach-Zehnder interferometer (MZI) and injection-locking it to a MLL which is the input to the interferometer. By modulating the current on the gain section or the voltage of the saturable absorber (SA) section of the injection-locked laser, one can introduce an arcsine phase response on each of the injected longitudinal modes. By combining the modulated optical comb with its unmodulated counterpart one can produce a linearized intensity modulator. The linearity of this modulator is inherent in its design and no pre- or postdistortion linearization scheme is utilized. The results of the two-tone intermodulation experiment are presented here for this modulator and a spur-free dynamic range (SFDR) of ~70 dB·Hz <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2/3</sup> is achieved by modulating the voltage of the SA. The reported SFDR is limited by the noise of the MLLs. The dynamic range could be further improved by decoupling the phase modulation and amplitude modulation. The proposed and demonstrated configuration as an analog optical link with improved linearity has the potential to increase the performance and resolution of photonic analog-to-digital converters (ADCs).
A von Willebrand's Factor Genomic Nucleotide Variant and Polymerase Chain Reaction Diagnostic Test Associated with Inheritable Type-2 von Willebrand's Disease in a Line of German Shorthaired Pointer Dogs (2004)

Heritable, type-2 von Willebrand's disease (vWD) was studied in a line of German Shorthaired Pointers (GSPs) in which some members had a nucleotide variant in exon 28 of the von Willebrand factor (VWF) gene. A polymerase chain reaction (PCR) diagnostic test for the nucleotide variant was developed to establish the disorder's mode of inheritance and to eliminate it from the line. Thirty-six of the 49 GSPs in the line, 14 unrelated GSP controls, and 71 unrelated dogs of various breeds were tested for the presence of the variant nucleotide. All the dogs with a vWF antigen deficiency (<70% of normal) were either homozygous or heterozygous for the nucleotide variant. The variant was not located in any tested dog in the line or outside of the line with a vWF antigen value greater than 68%. Of the GSPs in the line tested, two were homozygous for the variant, 15 were heterozygous, and 19 were variant free. The collective evidence of this and other studies is consistent with the variant nucleotide being the cause of the type-2 vWD in this line of GSPs and German Wirehaired Pointers. The PCR diagnostic test for the variant nucleotide was successfully used to select and produce progeny that were variant free and vWD free. This test should be effective in the subsequent elimination of this same variant from other lines of dogs.