gebhart/patrepeval huggingface dataset:
Implementation of time-optimal path-tracking control on palletizing robots (2003)

It is not easy to apply the algorithms for time-optimal trajectory planning in practice because they rely on the exact dynamic models of the system. In this paper, the authors propose a simplification of the time-optimal path-tracking control algorithms. The proposed algorithms are based only on the kinematic constraints. Such simplifications can be justified in cases when the actuators are never pushed to their torque limits and when the task gives the constraints for the optimal trajectory. One of the practical applications of these simplified algorithms are palletizing robots. For these robots, the gripping force is one of the key factors. If the dynamic forces are to high, the gripper may lose the load. Assuming that the payload is constant during the motion, the dynamic properties in the task space are not changing, and the maximal allowable accelerations can be determined from maximal gripping force. The acceleration and velocity bounds are then used in the trajectory planning algorithm. Although the the simplifications reduce the computational complexity, the trajectory has still to be precalculated offline. The proposed algorithm has been implemented in the authors' PC-based robot controller which is used to control a palletizing robot. Experimental results confirm that the proposed algorithms assure the end-effector motion in the prescribed bounds.
A TiO2-based volatile threshold switching selector device with 107 non linearity and sub 100 pA Off current (2016)

ReRAM crossbar arrays are known to be susceptible to the presence of the sneak current issue during the readout operations which undermines crossbar scaling. This problem can be solved by the addition of an highly non-linear two-terminal selector device. In this work we present a 5 nm thick TiO2-based selector which exploits a volatile threshold resistive switching, so far unreported for this material. The device shows a current density up to 100 kA/cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> , 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">7</sup> current non-linearity and a 4 V voltage margin, the highest reported for TiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> -based selectors and sub 100 pA off current.
[Posterior scleral reinforcement surgery]. (1997)

An accurate technique is necessary to avoid operative risk. Further long term studies are needed to assess the benefit of scleral reinforcement.
Calculation of partial isotope incorporation into peptides measured by mass spectrometry (2010)

Our method is valuable for estimating13C incorporation into peptides/proteins accurately and with high sensitivity. Generally, our method holds promise for wider applications in qualitative and especially quantitative proteomics.
Role of Nitric Oxide in the Regulation of Coronary Vascular Tone in Hearts From Hypertensive Rats (1995)

In arterial hypertension, coronary flow reserve, expressed by the difference between autoregulated and maximal coronary flow, is frequently impaired. Previous experimental and clinical investigations using acetylcholine as a stimulus for the production of endothelium-derived relaxing factor suggested that an impaired endothelium-dependent vasodilation, presumably caused by a decreased formation of nitric oxide (NO), may account for this microvascular dysfunction. However, so far no study has been performed that quantifies the formation of NO within the coronary circulation of hypertensive hearts to assess its role in setting coronary vascular tone in the hypertensive heart. We therefore quantified NO formation within the coronary circulation of constant flow-perfused, isolated hearts from spontaneously hypertensive rats (SHR, 16th to 26th week), as a model for hypertensive heart disease, and from the normotensive control strain (Wistar-Kyoto, WKY) using the oxyhemoglobin technique. Coronary perfusion pressure and vascular resistance were almost 30% higher in SHR compared with WKY hearts. Intracoronarily applied NO decreased coronary vascular resistance by maximally 45% of resting values in a concentration-dependent manner in both groups. The bradykinin-induced decrease in coronary vascular resistance and the parallel increase in NO release were comparable in SHR and WKY hearts and fell within the vasodilator range of exogenously applied NO. Moreover, basal release of NO normalized to heart wet weight was 50% higher in SHR compared with WKY hearts. Rates of basal NO release were correlated inversely with changes in coronary perfusion pressure and vascular resistance in both groups (r = -.85 and -.84, respectively, P < .05).(ABSTRACT TRUNCATED AT 250 WORDS)
Electric-magnetic-electric slow-wave microstrip line and bandpass filter of compressed size (2002)

This paper presents a novel integrated microstrip low-loss slow-wave line. The new microstrip replaces the conventional metal strip by composite metals paralleling the electric surface and magnetic surface (MS). The MS made of an array of coupled inductors shows a high-impedance state in the stopband, below which the propagation properties can be well controlled by varying the dimensions of the electric surface and MS. The dispersion curves obtained by matrix-pencil analyses closely correspond to those obtained by scattering-parameter extraction. Theoretical results, as confirmed experimentally, indicate that an increase of over 60% in the slow-wave factor can be achieved without sacrificing propagation losses, using the proposed structure. This electric-magnetic-electric (EME) microstrip is insensitive to the alignment position of the periodical structure, and can be constructed using conventional printed-circuit-board fabrication processes and integrated with other microwave components in a multilayered circuit. A compact EME bandpass filter (BPF) with suppressed harmonic responses is presented. The length of the filter is reduced by 26%, and the measured insertion loss and fractional bandwidth is comparable to that of a conventional microstrip BPF on the same substrate.
Predicting tensile properties of Ti-6Al-4V produced via directed energy deposition (2017)

Advanced manufacturing approaches, including additive manufacturing (i.e., “3D printing”) of metallic structures requires a change to qualification strategies. One approach, informed qualification, integrates modeling strategies to make predictions of material characteristics, including the prediction of tensile properties for given chemistries and microstructures. In this work, constitutive equations are developed and presented that can predict the yield strength of additively manufactured Ti-6Al-4V subjected to one of three different heat-treatments: a stress relief anneal in the α+β phase field; a hot isostatic press treatment in the α+β phase field; and a β-anneal. The equations are nominally identical, though different strengthening mechanisms are active according to subtle microstructural differences. To achieve an equation that can predict the yield strength of the material, it is also necessary to include an assessment of dramatic reduction in the tensile strength due to texture (i.e., a “knock-down” effect). This has been experimentally measured, and included in this paper. The resulting predictions of yield strength are generally within 5% of their experimentally measured values.
Achievable Rates and Scaling Laws for Cognitive Radio Channels (2007)

Cognitive radios have the potential to vastly improve communication over wireless channels. We outline recent information theoretic results on the limits of primary and cognitive user communication in single and multiple cognitive user scenarios. We first examine the achievable rate and capacity regions of single user cognitive channels. Results indicate that at medium SNR (0–20 dB), the use of cognition improves rates significantly compared to the currently suggested spectral gap-filling methods of secondary spectrum access. We then study another information theoretic measure, the multiplexing gain. This measure captures the number of point-to-point Gaussian channels contained in a cognitive channel as the SNR tends to infinity. Next, we consider a cognitive network with a single primary user and multiple cognitive users. We show that with single-hop transmission, the sum capacity of the cognitive users scales linearly with the number of users. We further introduce and analyze the primary exclusive radius, inside of which primary receivers are guaranteed a desired outage performance. These results provide guidelines when designing a network with secondary spectrum users.
Invited Paper: Improving Data Center Efficiency Through Holistic Scheduling In Kubernetes (2019)

Data centers are the infrastructure that underpins modern distributed service-oriented systems. They are complex systems-of-systems, with many interacting elements, that consume vast amounts of power. Demand for such facilities is growing rapidly, leading to significant global environmental impact. The data center industry has conducted much research into efficiency improvements, but this has mostly been at the physical infrastructure level. Research into software-based solutions for improving efficiency is greatly needed. However, most current research does not take a holistic view of the data center that considers virtual and physical infrastructures as well as business process. This is crucial if a solution is to be applied in a realistic setting. This paper describes the complex, system-of-systems nature of data centers, and discusses the service models used in the industry. We describe a holistic scheduling system that replaces the default scheduler in the Kubernetes container system, taking into account both software and hardware models. We discuss the initial results of deploying this scheme in a real data center, where power consumption reductions of 10-20% were observed. We show that by introducing hardware modelling into a software-based solution, an intelligent scheduler can make significant improvements in data center efficiency. We conclude by looking at some of the future work that needs to be performed in this area.
The Essence of Software Engineering: The SEMAT Kernel (2012)

Everyone who develops software knows that it is a complex and risky business, and its participants are always on the lookout for new ideas that will lead to better software. Fortunately, software engineering is still a young and growing profession that sees innovations and improvements in best practices every year. Just look, for example, at the improvements and benefits that lean and agile thinking have brought to software-development teams.
D-1-amino-2-propanol:NAD+ oxidoreductase. Purification and general properties of the large molecular form of the enzyme from Escherichia coli K12. (1984)

Growth of Escherichia coli K12 under relatively anaerobic conditions in a medium containing casein hydrolysate, 0.8% glycerol, and 0.8% hydroxyacetone has been found to induce the level of D-1-amino-2-propanol oxidoreductase activity 50- to 100-fold over that in cells grown in casein hydrolysate alone or with 0.8% glycerol added. A large molecular weight form of this oxidoreductase (designated Form L) has been purified to apparent homogeneity in good yield by three simple steps designed to obviate its conversion to a smaller species. The molecular weight of native Form L and its basic subunit are 417,000 +/- 20,700 and 50,500 +/- 2,770, respectively; hence Form L would appear to consist of eight identical subunits. The pH activity profile for Form L shows one optimum in the range of 8.3 to 8.6 and another at pH 10.0 to 10.2. This form of the oxidoreductase has no apparent requirement for added metal ions (rather, numerous divalent transition metal ions are strongly inhibitory) or thiol compounds; it catalyzes the oxidation of several vic-glycols but is completely stereospecific for the D-isomer of 1-amino-2-propanol, utilizes only NAD+ as cosubstrate in the oxidation reaction (Km for NAD+ with DL-1-amino-2-propanol = 1.23 mM), but both NADH and NADPH serve as cosubstrate in the reduction of hydroxyacetone. Oxidoreductase activity of Form L is highly sensitive to inhibition by Hg2+, p-mercuribenzoate, or dithiodipyridine; inhibition by the latter two compounds is completely reversed by adding a thiol in excess.
Full silicidation process for making CoSi2 on SiO2 (2004)

A silicidation process was developed to produce high-quality CoSi2 directly on SiO2, which can be used for metal gates of metal–oxide-semiconductor field-effect transistors (MOSFETs). Normally, the formation of a CoSi2 layer on SiO2 is very difficult because of the requirement for an exact Co/Si thickness ratio. In our process, an additional Si layer was deposited after the first rapid thermal processing (RTP) at 500 °C and selective etching of the unreacted Co. The additional Si layer provided a Si supply for the second RTP at a higher temperature. This method allows the Co layer thickness to be varied over a fairly large range, and in addition, the microstructure of the silicide layer and the CoSi2/SiO2 interface were substantially improved.
Towards Designing an Email Classification System Using Multi-view Based Semi-supervised Learning (2014)

The goal of email classification is to classify user emails into spam and legitimate ones. Many supervised learning algorithms have been invented in this domain to accomplish the task, and these algorithms require a large number of labeled training data. However, data labeling is a labor intensive task and requires in-depth domain knowledge. Thus, only a very small proportion of the data can be labeled in practice. This bottleneck greatly degrades the effectiveness of supervised email classification systems. In order to address this problem, in this work, we first identify some critical issues regarding supervised machine learning-based email classification. Then we propose an effective classification model based on multi-view disagreement-based semi-supervised learning. The motivation behind the attempt of using multi-view and semi-supervised learning is that multi-view can provide richer information for classification, which is often ignored by literature, and semi-supervised learning supplies with the capability of coping with labeled and unlabeled data. In the evaluation, we demonstrate that the multi-view data can improve the email classification than using a single view data, and that the proposed model working with our algorithm can achieve better performance as compared to the existing similar algorithms.
Insulin-Like Growth Factor Binding Proteins in Maternal Serum Throughout Gestation and in the Puerperium: Effects of a Pregnancy-Associated Serum Protease Activity* (1990)

The cDNAs encoding three major insulin-like growth factor-binding proteins (IGFBPs) have been cloned and sequenced. We have examined, by Western ligand blotting, the profiles of these binding proteins in human female serum in the normal menstrual cycle, throughout pregnancy, and during the postpartum period. There was no change in the serum profile of any of the binding proteins in early pregnancy compared to that in the secretory phase of the menstrual cycle. However, there was a marked decrease in circulating levels of the main serum IGFBP, IGFBP-3, after 6 weeks of gestation, continuing progressively to term and returning to nonpregnant levels by 5 days postpartum. IGFBP-2 decreased steadily throughout gestation. In contrast, IGFBP-1 levels were found to rise by the second trimester. Endoglycosidase-F digestion did not enhance detection of IGFBP-3 by ligand blotting. Immunoprecipitations with two separate antibodies against IGFBP-3 and IGFBP-2, followed by Western ligand blotting, confirmed the marked decrease in IGFBP-3 levels after 6 weeks of gestation and the more gradual decrease in IGFBP-2. In contrast, immunoprecipitations with IGFBP-1 monoclonal antibodies confirmed the increase in IGFBP-1 during gestation. Endogenous serum IGFs were separated from serum IGFBPs by acid chromatography, and an 80% decrease in total IGF-binding activity in the IGFBP fraction of chromatographed pregnancy vs. nonpregnancy serum was detected by charcoal absorption assay. Furthermore, immunoprecipitations of IGF affinity cross-linked IGFBP fractions with IGFBP-3-specific antiserum confirmed a marked diminution of IGFBP-3 in pregnancy compared to nonpregnancy serum, and revealed, only in pregnancy serum, the concomitant appearance of a band with a mol wt of 34K and three less intense bands with mol wt between 20-26K on sodium dodecyl sulfate gels. Incubation of nonpregnancy serum with 6-week pregnancy serum at 37 C for 5 h, followed by Western ligand blotting, showed only a slight reduction in the amount of IGFBP-3 in the mixture compared to that in controls. However, incubation of term pregnancy with nonpregnancy serum at 37 C for 5 h revealed a marked reduction of IGFBP-3 in the mixture. When iodinated recombinant IGFBP-3 was incubated with term pregnancy serum under the same conditions, the appearance of a 29K protein was identified by gel electrophoresis and autoradiography, along with three less intense bands with mol wt between 17-22K.(ABSTRACT TRUNCATED AT 400 WORDS)
An Adaptive IO Prefetching Approach for Virtualized Data Centers (2015)

Cloud and data center applications often make heavy use of virtualized servers, where flash-based solid-state drives (SSDs) have become popular alternatives over hard drives for data-intensive applications. Traditional data prefetching focuses on applications running on bare metal systems using hard drives. In contrast, virtualized systems using SSDs present different challenges for data prefetching. Most existing prefetching techniques, if applied unchanged in such environments, are likely to either fail to fully utilize SSDs, interfere with virtual machine I/O requests, or cause too much overhead if run in every virtualized instance.In this work, we demonstrate that data prefetching, when run in a virtualization-friendly manner can provide significant performance benefits for a wide range of data-intensive applications. We have designed and developed VIO-prefetching , consisting of accurate prediction of application needs in runtime and adaptive feedback-directed prefetching that scales with application needs, while being considerate to underlying storage devices and host systems. We have implemented a real system in Linux and evaluated it on different storage devices with the virtualization layer.Our comprehensive study provides insights of VIO-prefetching’s behavior at various virtualization system configurations, e.g., the number of VMs, in-guest processes, application types, etc. The proposed method improves virtual I/O performance up to 43 percent with the average of 14 percent for 1 to 12 VMs while running various applications on a Xen virtualization system.
A Solvent-Free, SeCN<sup>-</sup>/(SeCN)<sub>3</sub><sup>-</sup> Based Ionic Liquid Electrolyte for High-Efficiency Dye-Sensitized Nanocrystalline Solar Cells (2004)

A solvent-free ionic liquid electrolyte based on the SeCN-/(SeCN)3- redox couple has been employed for high-efficiency dye-sensitized nanocrystalline solar cells. For the first time an alternative redox couple has been identified to rival and even exceed the performance of the iodide/triiodide couple even at full sunlight. Unprecedented 7.5-8.3% power conversion efficiencies under AM 1.5 sunlight have been achieved for photovoltaic devices with solvent-free ionic liquid electrolytes.
Extreme Rate Acceleration by Axial Thiolate Coordination on the Isomerization of Endoperoxide Catalyzed by Iron Porphyrin (2008)

A coordinated effort: The isomerization mechanism of prostaglandin H2 (PGH2), which is catalytically isomerized to prostacyclin or thromboxane A2 by cytochrome P450s, was investigated using a heme-thiolate complex and an endoperoxide. Isomerization of endoperoxides proceeded very rapidly with this complex, whereas imidazole- or chloride-ligated heme had slight or no catalytic activity (see scheme). Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
Importance of Bile Tolerance of Lactobacillus acidophilus Used as a Dietary Adjunct (1984)

Cultures of lactobacilli identified as Lactobacillus acidophilus from the intestinal contents of young calves varied in their ability to grow in broth containing .3% oxgall compared with control broth. Frozen concentrated cultures were prepared from a strain exhibiting low tolerance to bile and from a strain exhibiting high tolerance to bile. Plate counts were comparable from the concentrated cultures before and after frozen storage on lactobacilli MRS agar with and without .15% oxgall. In a feeding trial involving newborn dairy calves supplementation of the diet with the more bile resistant strain of Lactobacillus acidophilus caused greater increases of numbers of facultative lactobabilli in the upper small intestines than did the strain exhibiting lower resistance to bile. It was not possible to determine whether the lactobacilli would prevent intestinal infections in the calves challenged with enteropathogenic Escherichia coli. This portion of the study failed as the challenge with Escherichia coli did not cause infections even in control animals.
Light modulation by transverse electric field induced oil surface deformation (1989)

Oil surface deformation on stripe electrodes by applying an electric field between neighboring electrodes is described. A laser beam can be diffracted by the deformed oil distribution on alternate electrodes. When the electrode width is 10 μm, the response times for voltage on and off are 4 and 1 ms, respectively, and light scattering efficiency is more than 90%.
Use of Borehole Stability Analysis for Successful Drilling of High-Angle Hole (1988)

Abstract The removal of rock during the drilling operation disturbs the natural rock formation that is being subjected to a state of compressive in situ stresses at depth. The redistribution of the stresses around the hole thus produces stress concentrations at or near the borehole wall. Having no effective control to counter the high stress buildup around the wellbore may lead to a number of hole problems that include stuck pipe, borehole collapse, sloughing shale, and excessive fill. Using the theory of elasticity in rock mechanics, a numerical model has been designed to practically evaluate the stability of hole conditions both before and during drilling operations. This paper addresses the control of mechanical instability due to stressed conditions other than the interaction of mud chemistry on the rock formations. Case analyses are presented for offshore drilling in the Gulf of Mexico. The results have shown that the rock mechanics modeling of borehole stresses can help achieve the successful drilling of high-angle holes using optimum mud weights determined in advance for controlling hole stability.
Edward Browne (1925)

Edward Browne Get access F. E. H. R. F. E. H. R. Search for other works by this author on: Oxford Academic Google Scholar Notes and Queries, Volume CXLIX, Issue nov21, 21 November 1925, Page 367, https://doi.org/10.1093/nq/CXLIX.nov21.367d Published: 21 November 1925