gebhart/patrepeval huggingface dataset:
Improved Robustness Through Closed-Loop Control for Aluminum Sheet Metal Stamp Forming (2008)

A stamp forming die, whose flexible blank holder was designed using FEA, was built. Tests were performed to evaluate the robustness of the die once closed-loop control was implemented. These results were compared to the results of open-loop tests presented earlier. The closed-loop tests were designed to determine the die and control system’s ability to reject process disturbances and demonstrate improved robustness in stamp forming when using a flexible blank holder and closed-loop control. Draw beads were used to control local punch forces and blank holder forces were used to control wrinkling. Experimental tests for the die demonstrated that closed-loop control of local punch forces using active draw beads improves robustness of the die. Two different lubricants and varying quantities of lubricant were evaluated for this study. Additionally, the ability to simultaneously use draw bead height to control local punch force and blank holder force to control wrinkles was demonstrated.
Regulation of ornithine decarboxylase in a transformed cell line that overexpresses translation initiation factor eIF-4E. (1996)

pMV7-4E cells (4E-P2), derived from NIH-3T3 cells, overexpress eIF-4E and exhibit characteristics of transformation, possibly due to translational relief of mRNAs encoding proteins that regulate cell growth. Ornithine decarboxylase (ODC), the rate-limiting enzyme in polyamine biosynthesis, is induced in 4E-P2 cells, and this induction appears to be related to the transformed phenotype of these cells. ODC mRNA contains extensive secondary structure in its 5' untranslated region (5'UTR) and may be regulated by eIF-4E, which melts mRNA secondary structure. To better understand this regulation, cDNA constructs containing the wild-type 5'UTR of ODC or deletion mutants inserted ahead of the luciferase gene were transfected into 4E-P2 and 3T3 cells. Expression of luciferase was higher in 4E-P2 cells in all cases, suggesting that the secondary structure of the ODC 5'UTR inhibits expression in 3T3 cells, and this inhibition is overcome by the high eIF-4E levels in 4E-P2 cells. When a small open reading frame present in the 5'UTR of ODC was destroyed by a point mutation, this luciferase construct was expressed about 6-fold over that containing the wild-type 5'UTR in both cell lines, although both of these 5'UTRs contain the same predicted secondary structure. Thus, factors in addition to eIF-4E may be involved in the regulation of ODC. To examine the differences in ODC regulation by polyamines in normal and transformed cells, the effect of N1,N12-bis(ethyl)spermine (BE-3-4-3) on the synthesis and degradation of ODC was examined. ODC activity in 4E-P2 cells was 10 times less sensitive to reduction by BE-3-4-3 compared to 3T3 cells, suggesting that high ODC levels in eIF-4E-overexpressing cells are the result of decreased regulation by polyamines as well as relief of translational regulation by eIF-4E.
Substrate Integrated Waveguide Cavity Filters: Miniaturization and New Materials for IoT Applications (2017)

This paper presents an overview of the current research trends in the field of substrate integrated waveguide (SIW) technology, with particular emphasis on the issues related to the emerging applications in the framework of the Internet of Things (IoT) and the fifth generation of mobile communication (5G). More specifically, different techniques adopted to miniaturize SIW cavities are described, with the aim of reducing the footprint of SIW components and filters. Moreover, the use of innovative materials, like paper, textile and 3D printed dielectric substrates, is presented and discussed, and the implementation of ecofriendly, wearable, and fully 3D structures is illustrated.
Observations on PCB Assembly Optimization (2001)

We present a hierarchical classification scheme for the optimization problems encountered in printed circuit board (PCB) assembly. The classification is based on the number of machines (one or many) and number of boards (one or many) present in the problem. The scheme also incorporates lower level classifications presented in the literature.
Characterization of glycine-N-methyltransferase-gene expression in human hepatocellular carcinoma (1998)

Messenger RNA differential display was used to study liver-gene expression in paired tumor and non-tumor tissues from hepatocellular carcinoma (HCC) patients. mRNA differential display and Northern-blot analyses showed that a 0.8-kb cDNA fragment was diminished or absent from the tumorous tissues of 7 HCC patients. The cDNA fragment was sequenced and found to have 98.7% nucleotide sequence homology with human glycine-N-methyltransferase cDNA (GNMT). In addition, there was no detectable level of GNMT expression in 4 human HCC cell lines, SK-Hep1, Hep 3B, HuH-7 and HA22T, examined by Northern-blot assay. A full-length GNMT cDNA clone-9-1-2 was obtained by screening a Taiwanese liver cDNA library. In comparison with the GNMT cDNA sequence reported elsewhere, clone 9-1-2 had 4 nucleotide differences resulting in 1 amino-acid change. Immunohistochemical staining with rabbit anti-recombinant GNMT serum showed that GNMT protein almost completely disappeared in liver-cancer cells, while it was abundant in the non-tumorous liver cells. Down-regulation of GNMT gene expression may be involved in the pathogenesis of liver cancer.
Hollywood Africans 1983 (1997)

Hollywood Africans*1983 Kevin Young (bio) Basquiat paints the town. PAW. BWANA. SEVEN stars. Night life—star-struck Basquiat’s arrived, brought Toxic & Rammellzee along for the ride. Our trio stomping new ground—shaky, kept. Hills,that is—black gold, Texas tea— out west Basquiat burns his canvas ochre, this trinity thin as their ties. Hip hop hippity hop— Sunset Blvd Walk of the Stars, streets stretched like limos. B at last in the black, dines out at Mr. Chow’s. IDI AMIN. 200 YEN. Put it on his tab— [End Page 288] trading meals for canvases free loaded with msgs, HERO-ISM. TOBACCO in purple, palimpsest. Toxic & RMLZ cool, eyes shaded by goggles, hats with Zs. Snores ville. GANGSTERISM. SELF-PORTRAIT as a heel #3. Hail, hail, the gang’s all heels—no winners or winters, just wanderlust amongst Oscars® & MOVIE STAR FOOTPRINTS like an astronaut’s. Rock rock planet rock don’t stop—POP CORN—SUGAR CANE. Academy Mammy Award & another for Butler, Rhett—To the moon Jemima—PAW— basquiat rockets NEW!—hands pressed fresh into pavement, permanent as a rap sheet, booked. Kevin Young Kevin Young, who was a Stegner Fellow at Stanford University, is author of Most Way Home, a volume of poems. He teaches creative writing and literature at the University of Georgia, Athens. A graduate of Harvard, he recently received the MFA degree at Brown University. Footnotes * © 1997 by Kevin Young. Copyright © 1997 Charles H. Rowell
Enhanced spin Hall torque efficiency in Pt100−<i>x</i>Al<i>x</i> and Pt100−<i>x</i>Hf<i>x</i> alloys arising from the intrinsic spin Hall effect (2016)

We report that the spin Hall torque generated by Pt can be enhanced substantially by alloying with Al or Hf. We observe damping-like spin torque efficiency per unit applied current density as high as ξDLj=0.23±0.02, nearly twice the maximum value reported for pure Pt. To achieve this maximum efficiency, a very thin (0.5 nm) Pt spacer layer is inserted between the alloy and the ferromagnet being manipulated, to avoid a degraded spin transparency at the alloy/ferromagnet interface.
Tracking using a local closed-world assumption : tracking in the football domain (1994)

In this work we address the problem of tracking objects in a complex, dynamic scene. The objects are nonrigid and difficult to model geometrically. Their motion is erratic and they change shape rapidly between frames sampled at 30 frames per second. The objects have low spatial resolution, and the video used for tracking was taken with a panning and zooming camera. Finally, the objects are tracked in sequences up to eight seconds long while moving over a complex background. We suggest that conventional tracking methods are unlikely to perform well at tracking small objects in complex environments because they do not use contextual information to drive feature selection. We propose using &quot;closed-world&quot; analysis to incorporate contextual knowledge into low-level tracking. A closed-world is a space-time region of an image where contextual information like the number and type of objects within the region is assumed to be known. Given that knowledge, the region can be analyzed locally using...
Bayesian update of dialogue state for robust dialogue systems (2008)

This paper presents a new framework for accumulating beliefs in spoken dialogue systems. The technique is based on updating a Bayesian network that represents the underlying state of a partially observable Markov decision process (POMDP). POMDP models provide a principled approach to handling uncertainty in dialogue but generally scale poorly with the size of the state and action space. The framework proposed, on the other hand, scales well and can be extended to handle complex dialogues. Learning is achieved with a factored summarising function that is applicable for many slot-filling type dialogues. The framework also provides a good structure from which to build hand-crafted policies. For very complex dialogues, this allows the POMDP's principled approach to uncertainty to be incorporated without requiring computationally intensive learning algorithms. Simulations show that the proposed framework outperforms standard techniques whenever errors increase.
Capillary forces as a limiting factor for sawing of ultrathin silicon wafers by diamond multi-wire saw (2020)

Succeeding with ultrathin silicon wafer sawing by diamond multi-wire saw, is not only a matter of optimization; the challenges of thin wafer production and the capability limit have not yet been fully understood. In this work, we have seen that regular pairing of wires occurs when the wire-wire separation distance is reduced below some critical value. The wire pairing leads to wire jumps on the wire guide rolls, and if the run is not stopped, it leads to wire breakage. Moreover, it effectively obstructs the production of wafers thinner than the critical wire-wire distance. We suggest that the physical explanation to the observed limitations to ultrathin wafer sawing, by diamond multi-wire saw, is related to the capillary force acting on the wires due to the sawing liquid bridge connecting the wires. The hypothesis is supported by simplified mathematical modelling including capillary and spring forces between infinitely long, parallel wires. The calculations suggest that capillary forces are the main reason for wire pairing, and that wire pairing will occur when the wire distance is below some critical distance. This matches the observed, experimental behavior. The critical distance will vary with wafer saw design and operation. To succeed with cutting very thin wafers, we recommend using lower surface tension sawing fluid or even dry in-cut, to reduce the capillary forces and thus decrease the critical wire separation distance, and to reduce wire oscillations to decrease the probability of sub-critical wire-wire separation distance. To reduce the vibration amplitude, shorter distance between the wire guide rolls, thinner wires, and increased wire tension are suggested.
Digital halftoning with optimized dither array (2002)

The paper presents the new design method of the ordered dither array based on a simulated annealing. The obtained ordered dither array is appropriate for press printing. Because of several physical reasons, halftoning for press printing has more difficulties than halftoning for electronic displays, laser printers, or ink-jet printers. Even if the error diffusion is one of the best solutions for halftoning, that is not appropriate for press printing. Because too much dot-gain and dot-loss exist, the tonal characteristics of actual printed images will change excessively from the logical tone of digital halftone images. This is one of the main reasons why dispersed-dot stochastic screens are seldom used for press printing. The proposed halftone dither array has aperiodic clustered-dot pattern. The array is designed with simulated annealing. The cluster size can be controlled by the weighting parameter of the cost function. We will get a dither array with arbitrarily sized cluster-dot. The characteristics of the algorithm and the halftoned images are investigated in detail. As a result, the facts that the proposed halftone masks are superior to the conventional screens in visual quality, and are comparable to the conventional AM screens in press printability are confirmed.
A two-level protocol to answer private location-based queries (2009)

An important privacy issue in Location Based Services (LBS) is to hide a user's identity and location while still providing quality location based services. A user's identity can be easily hidden through anonymous web browsing services. However, a user's location can reveal a user's identity. For example, a user at home may want to ask queries such as “Find the nearest hospital around me” through a GPS enabled mobile phone but he may not be willing to dislose his own location. A common way to achieve location privacy is through cloaking, e.g. the client sends a cloaked region to the server and filters the results to find the exact answer. Recently, Private Information Retrieval has been adopted to answer private location-based queries. However, we argue that ensuring the server does not reveal more data than what is queried is important at the same time. In this paper, we propose an efficient two-level solution based on two cryptographic protocols: PIR and Oblivious Transfer. Our solution is a general-purpose one and can use either a two-level PIR [2] or it can use a combination of PIR and Oblivious Transfer [11]. Our approach provides privacy for the user/client, does not use a trusted party or anonymizer, is provably privacy-preserving, and when compared to previous approaches ensures that the server reveals as minimum data as is required, and the data that is released by the server is as fine-grained or precise as possible.
Improved Asset Management through Corrosion Health Monitoring (2013)

Abstract The military spends billions of dollars annually on inspection and repair of damage resulting from corrosion of high value assets, including aircraft and support equipment. Currently available methods for identifying and preventing corrosion involve labor intensive scheduled inspections and maintenance that are costly and reduce asset availability. In order to increase overall safety, availability, and operational efficiency, an online monitoring system capable of fusing data streams from an array of environmental and corrosivity sensors has been developed. The sensing system has been designed to provide autonomous indications of corrosive severity throughout an airframe. The sensors, system design, and corrosivity classification methods are detailed. Results and analysis of the wireless, ultra-low power sensor network performance in laboratory tests and vehicle service environments are given. By providing a high level of visibility for corrosion within a structure the system can be used to improve asset management for corrosion prevention and control. Localized corrosion process such as pitting, crevice corrosion, exfoliation, and environment assisted cracking are difficult to detect and can significantly degrade structural integrity. A corrosion monitoring system that includes various environmental and corrosivity sensors is used to track component environmental exposure as a function of time. Corrosion diagnostic models based on measurements of exposure conditions, corrosion rate, and cumulative environmental severity can be embedded into the system for real-time corrosion evaluation. For given future environmental conditions, these models can be used to forecast and schedule inspection and maintenance activities. The system provides a clear indication of environmental severity, exposure conditions, and corrosion rates within a structure, and the embedded models contained within the system can provide maintainers direct access to understandable and actionable information. These capabilities allow for increased efficiencies in maintenance practices, leading to lower life cycle costs and increased asset availability.
Early Meiotic Transcripts Are Highly Unstable in <i>Saccharomyces cerevisiae</i> (1992)

Meiosis in Saccharomyces cerevisiae requires the induction of a large number of genes whose mRNAs accumulate at specific times during meiotic development. This study addresses the role of mRNA stability in the regulation of meiosis-specific gene expression. Evidence is provided below demonstrating that the levels of meiotic mRNAs are exquisitely regulated by both transcriptional control and RNA turnover. The data show that (i) early meiotic transcripts are extremely unstable when expressed during either vegetative growth or sporulation, and (ii) transcriptional induction, rather than RNA turnover, is the predominant mechanism responsible for meiosis-specific transcript accumulation. When genes encoding the early meiotic mRNAs are fused to other promoters and expressed during vegetative growth, their mRNA half-lives, of under 3 min, are among the shortest known in S. cerevisiae. Since these mRNAs are only twofold more stable when expressed during sporulation, we conclude that developmental regulation of mRNA turnover can be eliminated as a major contributor to meiosis-specific mRNA accumulation. The rapid degradation of the early mRNAs at all stages of the yeast life cycle, however, suggests that a specific RNA degradation system operates to maintain very low basal levels of these transcripts during vegetative growth and after their transient transcriptional induction in meiosis. Studies to identify specific cis-acting elements required for the rapid degradation of early meiotic transcripts support this idea. A series of deletion derivatives of one early meiosis-specific gene, SPO13, indicate that its mRNA contains determinants, located within the coding region, which contribute to the high instability of this transcript. Translation is another component of the degradation mechanism since frameshift and nonsense mutations within the SPO13 mRNA stabilize the transcript.
A time domain electromagnetic survey of the TAG Hydrothermal Mound (1996)

A conductivity survey of the TAG mound was made using innovative transient electric dipole‐dipole instrumentation. The receiver was deployed on the sulfide mound 30 m south of the central black smoker while the submersible ALVIN carried the transmitter on a survey path around the receiver at a radius of approximately 70 m. Conductivity measurements of the seafloor between the transmitter and receiver were made at 5 minute intervals. The survey lasted 4 hours. Measurements made at 12 sites are initially interpreted in terms of an apparent conductivity of a uniform seafloor. A more complex model in which the seafloor has two layers is then used. Apparent conductivities range from 1.4 to 15.9 S/m, generally higher than that of seawater. The results suggest possible focusing of hydrothermal convection in the northern quadrant of the mound, adjacent zones of anhydrite accumulation and fluid convection in the north‐eastern quadrant, heterogeneity and layering in the Kremlin zone, and unexpected spatial variability in the western quadrant. The data from several sites show evidence of distortion attributed to 3‐D anomalies.
Ca <sup>2+</sup> antagonists inhibit DNA fragmentation and toxic cell death induced by acetaminophen <sup>1</sup> (1993)

Ca2+ accumulates in the nucleus and DNA undergoes enzymatic cleavage into internucleosome-length fragments before acetaminophen and dimethylnitrosamine produce hepatic necrosis in vivo and toxic cell death in vitro. However, Ca(2+)-endonuclease fragmentation of DNA is characteristic of apoptosis, a type of cell death considered biochemically and functionally distinct from toxic cell death. The present studies investigate DNA fragmentation as a critical event in toxic cell death by testing whether the Ca(2+)-calmodulin antagonist chlorpromazine and the Ca2+ channel blocker verapamil prevent acetaminophen-induced hepatic necrosis by inhibiting Ca2+ deregulation and DNA damage. Acetaminophen overdose in mice produced accumulation of Ca2+ in the nucleus (358% of control) and fragmentation of DNA (250% of control) by 6 h, with peak release of ALT occurring at 12-24 h (38,000 U/l). Pretreatment with chlorpromazine prevented increases in nuclear Ca2+ and DNA fragmentation and nearly abolished biochemical evidence of toxic cell death. Verapamil pretreatment also decreased Ca2+ accumulation and DNA damage while attenuating liver injury. The Ca2+ antagonists did not protect against toxic cell death through hypothermia because neither produced the delay in toxicity that is customarily associated with hypothermia. Nor did chlorpromazine or verapamil protect through inhibiting acetaminophen bioactivation. Chlorpromazine failed to diminish glutathione depletion in whole liver and isolated nuclei. Verapamil (250 microM) also failed to alter glutathione depletion in whole liver and had no effect on acetaminophen-glutathione adduct formation by mouse liver microsomes and by cultured mouse hepatocytes. Collectively, these results support the hypothesis that Ca(2+)-induced DNA fragmentation plays a significant role in cell necrosis produced by acetaminophen and may contribute to toxic cell death caused by other alkylating hepatotoxins.
Microwave‐Sensitive Foamable Poly(ionic liquids) Bearing <i>tert</i>‐Butyl Ester Groups: Influence of Counterions on the Ester Pyrolysis (2008)

Several poly(ionic liquids) have been synthesized based on poly(1-vinyl-3-tert-butoxycarbonylmethylene imidazolium) salts with different counterions to investigate the tert-butyl ester pyrolysis of these compounds. It is found that the counterions strongly influence the temperature of the pyrolysis. The pyrolysis temperature shifts to higher or lower temperatures depending on the nature of the counterions. The use of microwave irradiation was employed to accelerate the gas release because of the high dipolar interaction of amorphous salts with microwaves. The result of these reactions is the formation of organic foams that could be of industrial interest.
Abstract: In‐process intergranular corrosion in Al alloy thin films (1976)

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation P. A. Totta; Abstract: In‐process intergranular corrosion in Al alloy thin films. J. Vac. Sci. Technol. 1 January 1976; 13 (1): 26–27. https://doi.org/10.1116/1.568867 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAVS: Science & Technology of Materials Interfaces and ProcessingJournal of Vacuum Science and Technology Search Advanced Search |Citation Search
Study of AC/DC Power Coordinated Control for Multi-circuit UHVDC Transmissions of Sichuan (2010)

There is an AC/DC transmission system in Sichuan power grid include 1000kV UHVAC transmission and ±800 kV UHVDC transmission, after Jingsha river hydropower stations and their UHVDC transmission were finished. Power network structure of Sichuan power grid will be more complicated. According to the characteristic of Sichuan power grid, the control method of DC active power coordinated control is selected. And the influence of Sichuan power grid stability of ample flow period maximum method caused by DC active power coordinated control is analyzed. The result of research shows that the capability of Sichuan power grid against serious fault can be improved with DC active power coordinated control.