gebhart/patrepeval huggingface dataset:
Mitigation of Torsional Stick-Slip Vibrations in Oil Well Drilling through PDC Bit Design: Putting Theories to the Test (2011)

Abstract Stick-slip vibrations of drillstrings have been studied by researchers for several decades. The subject is gaining renewed interest as operating parameters for PDC bits have shifted to the stick-slip regime of higher bit weight and lower rotary speed for enhanced drilling performance. In Ledgerwood et al. (2010), stick-slip was identified as a primary cause of bit damage. The main objective of the current investigation is to answer the longstanding question: Do bit designs influence stick-slip behavior of the drilling system? Five prevailing industry perceptions reported in the literature are that anti-whirl bits, reduced exposure bits, and bits with bit-rock interaction number "β" &gt; 1 are less prone to stick-slip, while highly aggressive bits and worn bits are more prone to stick-slip. Although the phenomenological basis of these theories has been provided, validation in most cases is based on anecdotal evidence from the field. Data with diagnosis based on downhole measurements in a controlled environment are scarce. Consequently, conflicting opinions continue to exist about whether any of these theories work in reality. To assess their validity, the five leading theories were reviewed and pairs of PDC bits were designed and manufactured. Each pair consisted of a bit with a standard design and a bit that embodied one of the theories. The bits were first tested in the laboratory to characterize their response. Full-scale wells were then drilled under controlled conditions using a research drill rig in Oklahoma. In these wells, only the operating parameters were varied while BHA, formation, and other variables were unchanged for a given bit pair. The downhole vibrations were measured with a new in-bit device and an industry-proven MWD vibration monitoring service. The most important conclusion emerging from this study is that PDC bit design has a significant effect on stick-slip vibrations. While some of the theories held true, evidence from this study did not support others. The details of test results are provided and various aspects of bit design are discussed in an attempt to enhance the understanding of stick-slip mitigation.
Azo Polymers for Reversible Optical Storage. 6. Poly[4-[2-(methacryloyloxy)ethyl]azobenzene] (1995)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAzo Polymers for Reversible Optical Storage. 6. Poly[4-[2-(methacryloyloxy)ethyl]azobenzene]Almeria Natansohn, Paul Rochon, Mei-Sing Ho, and Chris BarrettCite this: Macromolecules 1995, 28, 12, 4179–4183Publication Date (Print):June 1, 1995Publication History Published online1 May 2002Published inissue 1 June 1995https://pubs.acs.org/doi/10.1021/ma00116a019https://doi.org/10.1021/ma00116a019research-articleACS PublicationsRequest reuse permissionsArticle Views495Altmetric-Citations116LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
Homogeneous catalysis of the water gas shift reaction using a platinum chloride-tin chloride system (1978)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHomogeneous catalysis of the water gas shift reaction using a platinum chloride-tin chloride systemChien-Hong Cheng and Richard EisenbergCite this: J. Am. Chem. Soc. 1978, 100, 18, 5968–5970Publication Date (Print):August 1, 1978Publication History Published online1 May 2002Published inissue 1 August 1978https://doi.org/10.1021/ja00486a073RIGHTS & PERMISSIONSArticle Views217Altmetric-Citations54LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (434 KB) Get e-Alerts Get e-Alerts
Recursively Partitioned Static IP Router-Tables (2007)

We propose a method-recursive partitioning-to partition a static IP router table so that when each partition is represented using a base structure such as a multibit trie or a hybrid shape shifting trie there is a reduction in both the total memory required for the router table as well as in the total number of memory accesses needed to search the table. The efficacy of recursive partitioning is compared to that of the popular front-end table method to partition IP router tables. Our proposed recursive partitioning method outperformed the front-end method of all our test sets.
Fluid Mechanics of Bubble Growth and Collapse in a Thermal Ink Jet Printhead (1989)

A three-dimensional fluid mechanics analysis of a bubble growth and collapse has been carried out for some thermal ink jet printhead geometries. For that purpose, a computer code has been developed which can handle multi-valued free surfaces that arise in such geometries. This paper presents sample results which show how the bubble grows and collapses, and how it differs with geometrical changes.
Imaging Interferometric Nanoscopy to the Limit of Available Frequency Space (2009)

Imaging interferometric microscopy resolution to λ/2(nsub+1) (nsub = substrate refractive index) is demonstrated using evanescent-wave illumination. Resolution to 150 nm (λ/4.2) is achieved using a 633 nm source and a 0.4 NA lens.
Enhanced High Harmonic Generation from Multiply Ionized Argon above 500 eV through Laser Pulse Self-Compression (2009)

By combining laser pulse self-compression and high harmonic generation within a single waveguide, we demonstrate high harmonic emission from multiply charged ions for the first time. This approach enhances the laser intensity and counteracts ionization-induced defocusing, extending the cutoff photon energy in argon above 500 eV for the first time, with higher spectral intensity and cutoff energy than He for the same input laser parameters. This Letter demonstrates a pathway for extending high harmonic emission to very high photon energies using large, multiply charged, ions with high ionization potentials.
Ideal microlenses for laser to fiber coupling (1993)

The design and fabrication of ideal microlenses for semiconductor laser to fiber coupling are reported. Properly coated for reflections, lenses of the new design can theoretically collect 100% of the radiated energy of a modal-symmetric laser source. The crucial feature is its hyperbolic shape. Microlenses fabricated directly on the end of the fiber by laser micromachining have demonstrated up to 90% coupling efficiency. This performance represents a major advance in microlens technology when compared to currently fabricated hemispherical microlenses which are at best 55% efficient. A theoretical comparison of the two lens shapes illuminates the advantages of the hyperbolic profile. The ability to couple all of the light from a semiconductor laser into a fiber has far-reaching implications for all optical communication systems.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Phase modulation and second-harmonic nulling to eliminate interference fringes from the spectrum of a coherent frequency-domain THz spectrometer (2013)

We report on the continued progress of a portable, battery-operated frequency domain terahertz spectrometer with an integrated, fiber-coupled, lithium-niobate optical phase-modulator. We discuss the progress on shifting the THz phase 90 degrees between consecutive data samples to remove the interference pattern and on developing a method of employing second harmonic nulling to actively adjust the THz phase and continuously maintain a maximum detected THz signal.
Localization and enumeration of fimbria-associated adhesins of Bacteroides loescheii (1988)

Monoclonal antibodies that specifically inhibit coaggregation between Bacteroides loescheii PK1295 and its two gram-positive partners Streptococcus sanguis 34 and Actinomyces israelii PK14 were used to enumerate and localize two distinct types of fimbria-associated adhesins on the surface of B. loescheii. Binding studies with radiolabeled monoclonal antibodies indicated that a maximum (Bmax calculated from Scatchard plots) of approximately 400 adhesin molecules specific for S. sanguis and 310 adhesin molecules specific for A. israelii reside on the surface of the cell. Immunoelectron microscopy revealed that the adhesins were not an integral part of the fimbrial subunit; rather, they were usually found on the distal portion of the structures arranged in a random fashion.
Fitness heart rate measurement using face videos (2017)

Recent studies showed that subtle changes in human's face color due to the heartbeat can be captured by digital video recorders. Most existing work focused on still/rest cases or those with relatively small motions. In this work, we propose a heart-rate monitoring method for fitness exercise videos. We focus on designing a highly precise motion compensation scheme with the help of the optical flow, and use motion information as a cue to adaptively remove ambiguous frequency components for improving the heart rates estimates. Experimental results show that our proposed method can achieve highly precise estimation with an average error of 1.1 beats per minute (BPM) or 0.58% in relative error.
T-Cell Receptor-Derived Peptides in Immunoregulation and Therapy of Retrovirally Induced Immunosuppression (2001)

Retrovirally infected humans and mice showed progressive acquired immunodeficiency accompanied by the production of elevated levels of autoantibodies directed against T-cell receptor variable-domain epitopes. Epitope mapping analyses indicated that a major determinant recognized was defined by a 16-mer peptide containing the entire CDR1 segment and part of the FR2 region of human Vbeta8, and that both species showed reactivity to the same sequence. Either prophylactic or therapeutic administration of this peptide to retrovirus-infected C57/BL/6 mice normalized the balance of T(H)1- and T(H)2-type helper activity and restored the resistance to infection by the opportunistic parasite Cryptosporidium. Administration of the peptide did not generate significantly increased levels of autoantibody, but had a profound effect on T-cell activity as well as other aspects of inflammation, including NK-cell activity. A 16-mer derived from the Jbeta sequence showed similar functional effects on T cells from retrovirus-infected mice. Direct binding of the VbetaCDR1 peptide to recombinant TCR Valpha/Vbeta constructs, as well as to IgM natural autoantibodies, suggests that the cell surface receptor for the peptide is the alpha/beta TCR on T cells and surface IgM in B cells. The Vbeta CDR1 peptide stimulated division of murine splenocytes in vitro, stimulated the production of the T(H)1 cytokine IL-2, and synergized with the T-cell mitogen concanavalin A in proliferation and IL-2 production. These studies indicate that administration of peptides derived from T-cell receptor variable domains to animals immunosuppressed as a result of retroviral infection has a profound immunomodulatory effect enhancing overall T-cell functional capacity, particularly with respect to the cytokine production characteristic of T(H)1-type cells. Our studies are interpreted in the context of other recent investigations of immunomodulatory peptides.
Advanced residual predction in 3D-HEV (2013)

Inter-view residual prediction (IVRP) is employed t o efficiently code non-base texture views by exploiting the correlation of residues between two views in 3D video coding extension of HEVC(3D-HEVC). To further improve the performance of texture coding, advanced residual prediction (ARP) is proposed in this paper. In IVRP, residues in a non-base view are predicted from decoded residues in base view. In contrast, ARP makes the residual predictor for the non-base view block based on newly generated base-view residues by applying motion vector at the non-base view to the baseview. Moreover, an adaptive weighting factor is applied to reduce prediction error. Comprehensive simulations show that up to 6.0% luma BD-rate reduction was obtained over IVRP in the reference software of 3D-HEVC.
FEW WALLED CARBON NANOTUBE PRODUCTION IN LARGE-SCALE BY NANO-AGGLOMERATE FLUIDIZED-BED PROCESS (2008)

Few walled carbon nanotubes (FWCNTs) have been successfully synthesized using a nano-agglomerate fluidized-bed process. FWCNTs can be obtained by fluidization of Fe ( Co / Ni )/ Mo / MgO catalysts at a high temperature with methane cracking in a nano-agglomerate fluidized-bed reactor. The products were mainly 2 to 5 walled CNTs with an outer diameter of 1–7 nm in high purity, as revealed by Raman spectrometry, SEM, and HRTEM analysis. Two keys were crucial for this process. The first key was to get the small size of activity catalyst particles which was realized by Mo addition in catalyst. The graphitization of FWCNTs strongly depended on the composition of catalyst. Fe / Mo / MgO catalyst showed the highest activity and the FWCNT product with the best graphitization. Another key for this process was that the particles must be kept in fluidized state during FWCNT formation. Detailed process information was reported in this article, which showed a potential way for the large scale production of FWCNTs, thereby the urgent need for FWCNTs in high performance will be overcome.
Game theoretical-based demand response modeling considering industrial customers (2018)

In this paper, a novel incentive-based demand response (DR) model is established from the perspective of a grid operator (GO), over which industrial customers are regarded as active players in the intra-day market to help lower the cost for compensating system resource deficiency in the form of load reductions. By leveraging a GO incentive, the interactions between the GO and industrial consumers are studied using Stackelberg game theory, and a unique Stackelberg equilibrium (SE) is proven to exist in the game, which yields the optimal resource trading outcome, composed of the optimal GO incentive value and load reduction quantities procured from each industrial customer. Numerical analyses showed that the proposed approach is effective in minimizing the total cost for compensating system resource deficiency.
Spatial Mapping in the Rat Olfactory Bulb by Odor and Direct Electrical Stimulation (2016)

These data suggest that by programming an array of stimulating electrodes, it should be possible to selectively activate different regions of the olfactory bulb, generating unique patterns of neural activity as seen in normal smell.
Cesium Hydroxide Promoted Chemoselective <i>N</i>-Alkylation for the Generally Efficient Synthesis of Secondary Amines (1999)

Selective N-alkylation of primary amines was developed using cesium hydroxide to prepare various secondary amines efficiently. A cesium base not only promoted monoalkylations of primary amines but also suppressed overalkylations. Various amines and alkyl bromides were examined, and the preliminary results demonstrated this methodology was highly chemoselective, favoring mono-N-alkylation over dialkylation. In particular, use of amino acid derivatives afforded the desired secondary amines exclusively.
Full-frame video stabilization with motion inpainting (2006)

Video stabilization is an important video enhancement technology which aims at removing annoying shaky motion from videos. We propose a practical and robust approach of video stabilization that produces full-frame stabilized videos with good visual quality. While most previous methods end up with producing smaller size stabilized videos, our completion method can produce full-frame videos by naturally filling in missing image parts by locally aligning image data of neighboring frames. To achieve this, motion inpainting is proposed to enforce spatial and temporal consistency of the completion in both static and dynamic image areas. In addition, image quality in the stabilized video is enhanced with a new practical deblurring algorithm. Instead of estimating point spread functions, our method transfers and interpolates sharper image pixels of neighboring frames to increase the sharpness of the frame. The proposed video completion and deblurring methods enabled us to develop a complete video stabilizer which can naturally keep the original image quality in the stabilized videos. The effectiveness of our method is confirmed by extensive experiments over a wide variety of videos.
The Expressed L1 Proteins of HPV-1 HPV-6, and HPV-11 Display Type-Specific Epitopes with Native Conformation and Reactivity with Neutralizing and Nonneutralizing Antibodies (1994)

Previous studies demonstrated that the human papillomavirus (HPV) type 1 L1 protein, expressed in cos cells by an SV40-based vector, displays conformational epitopes characteristic of native virions. In this study, we analyzed the expression of HPV-1, HPV-6, and HPV-11 L1 proteins in order to determine the forms of conformational epitopes expressed by recombinant L1 proteins. Using both immunofluorescence and immunoprecipitation techniques, polyclonal and monoclonal antibodies (MAbs) generated against native HPV-11 virions reacted with expressed L1 proteins of HPV-6 and/or HPV-11, but not HPV-1. Similarly, polyclonal antibodies and MAbs generated against HPV-1 virions reacted with the expressed L1 protein of HPV-1, but not HPV-6 or HPV-11. Of two MAbs that neutralized HPV-11 infection of murine fetal foreskin xenografts, one reacted with the expressed L1 protein of both HPV-6 and HPV-11, and the other reacted with HPV-11 only. A nonneutralizing conformationally dependent MAb reacted with the expressed L1 protein of both HPV-6 and HPV-11. These results demonstrate that expressed HPV L1 proteins retain type-specific, neutralizing, and nonneutralizing conformational epitopes and that cos cells may be utilized to evaluate host immune responses to such epitopes.
Characterization of a projection lens using the extended Nijboer-Zernike approach (2002)

In this paper we give the proof of principle of a new experimental method to determine the aberrations of an optical system in the field. The measurement is based on the observation of the intensity point spread function of the lens. To analyze and interpret the measurement, use is made of an analytical method, the so-called extended Nijboer-Zernike approach. The new method is applicable to lithographic projection lenses, but also to EUV mirror systems or microscopes such as the objective lens of an optical mask inspection tool. Phase retrieval is demonstrated both analytically and experimentally. Theory and experimental results are given.
Localised three-dimensional adaptive spatial–temporal processing for airborne radar (2003)

Radar space1–time adaptive processing (STAP) techniques have classically focused on azimuth–Doppler adaptivity while placing minimal emphasis on elevation. Elevation adaptivity offers significant clutter suppression improvement, allowing further suppression of interference sources having identical Doppler and azimuth as the expected target. Work is presented which incorporates elevation adaptivity using two approaches: a factored approach and a joint domain approach, both greatly improving clutter suppression performance. The proposed concepts are validated using results based on simulated range ambiguous airborne radar data. Target detection improvements on the order of 8 dB and 10 dB (as compared to standard 2D-JDL processing) are demonstrated for the factored and joint domain approaches, respectively, using an 8×8 nonuniform rectangular array.
Functional Analysis of RF2a, a Rice Transcription Factor (2003)

RF2a is a bZIP transcription factor that regulates expression of the promoter of rice tungro bacilliform badnavirus. RF2a is predicted to include three domains that contribute to its function. The results of transient assays with mutants of RF2a from which one or more domains were removed demonstrated that the acidic domain was essential for the activation of gene expression, although the proline-rich and glutamine-rich domains each played a role in this function. Studies using fusion proteins of different functional domains of RF2a with the 2C7 synthetic zinc finger DNA-binding domain showed that the acidic region is a relatively strong activation domain, the function of which is dependent on the context in which the domain is placed. Data from transgenic plants further supported the conclusion that the acidic domain was important for maintaining the biological function of RF2a. RF2a and TBP (TATA-binding protein) synergistically activate transcription in vitro (Zhu, Q., Ordiz, M. I., Dabi, T., Beachy, R. N., and Lamb, C. (2002) Plant Cell 14, 795-803). In vitro and in vivo assays showed that RF2a interacts with TBP through the glutamine-rich domain but not the acidic domain. Functional analysis of such interactions indicates that the acidic domain activates transcription through mechanisms other than via the direct recruitment of TBP.
Thermosetting adhesives resins from whey and whey by-products (1984)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermosetting adhesives resins from whey and whey by-productsTito Viswanathan and Tom RichardsonCite this: Ind. Eng. Chem. Prod. Res. Dev. 1984, 23, 4, 644–647Publication Date (Print):December 1, 1984Publication History Published online1 May 2002Published inissue 1 December 1984https://pubs.acs.org/doi/10.1021/i300016a027https://doi.org/10.1021/i300016a027research-articleACS PublicationsRequest reuse permissionsArticle Views245Altmetric-Citations14LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access options Get e-Alerts