gebhart/patrepeval huggingface dataset:
A Turbine-powered UAV Controls Testbed (2007)

The latest version of the NASA Flying Controls Testbed (FLiC) integrates commercial-off-the-shelf components including airframe, autopilot, and a small turbine engine to provide a low cost experimental flight controls testbed capable of sustained speeds up to 200 mph. The series of flight tests leading up to the demonstrated performance of the vehicle in sustained, autopiloted 200 mph flight at NASA Wallops Flight Facility's UAV runway in August 2006 will be described. Earlier versions of the FLiC were based on a modified Army target drone, AN/FQM-117B, developed as part of a collaboration between the Aviation Applied Technology Directorate at Fort Eustis, Virginia and NASA Langley Research Center. The newer turbine powered platform (J-FLiC) builds on the successes using the relatively smaller, slower and less expensive unmanned aerial vehicle developed specifically to test highly experimental flight control approaches with the implementation of C-coded experimental controllers. Tracking video was taken during the test flights at Wallops and will be available for presentation at the conference. Analysis of flight data from both remotely piloted and autopiloted flights will be presented. Candidate experimental controllers for implementation will be discussed. It is anticipated that flight testing will resume in Spring 2007 and those results will be included, if possible.
The Random Contact Equation and Its Implications for (Colloidal) Rods in Packings, Suspensions, and Anisotropic Powders (1996)

ADVERTISEMENT RETURN TO ISSUEPREVCorrectionNEXTThe Random Contact Equation and Its Implications for (Colloidal) Rods in Packings, Suspensions, and Anisotropic PowdersAlbert P. PhilipseCite this: Langmuir 1996, 12, 24, 5971Publication Date (Web):November 27, 1996Publication History Published online27 November 1996Published inissue 1 January 1996https://pubs.acs.org/doi/10.1021/la960869ohttps://doi.org/10.1021/la960869ocorrectionACS PublicationsCopyright © 1996 American Chemical Society. This publication is available under these Terms of Use. Request reuse permissions This publication is free to access through this site. Learn MoreArticle Views664Altmetric-Citations41LEARN 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 PDF (54 KB) Get e-AlertscloseSUBJECTS:Approximation,Energy,Granular materials,Suspensions Get e-Alerts
Reflectivity reduction by oxygen plasma treatment of capped metallization layer (1989)

Oxygen plasma treatments of thin cap layers of Ti, Ta, W, or W–10% Ti deposited over Al or refractory metal silicide films can significantly reduce the optical reflectivity. The reduction is proportional to the thickness of oxide film grown on the cap layer. The oxidation occurs mostly in the first 5 min of plasma treatment and is a function of temperature. The oxide films have been characterized by Auger spectroscopy, Rutherford backscattering spectrometry, and ellipsometry. The measured reflectivities agree very well with the calculated results. This reduction in reflectivity is useful for photoresist processing as demonstrated by both computer modeling and experimental photoresist linewidth measurement.
Citation patterns in anxiety disorders research in 14 journals: 1990- 1991 (1994)

The authors reviewed the distribution of citations in 278 anxiety disorder studies published in 14 journals in 1990 and 1991. Although both psychiatrists and psychologists frequently authored studies, few journals showed evidence of a substantial interdisciplinary perspective. The 278 anxiety disorder studies contained 3,199 references to articles in the 14 journals. There was a high percentage of "self-citation" in some of the journals and only limited evidence of citations across journal and author disciplines. These findings suggest that anxiety disorder research findings are often not widely disseminated across disciplines.
Transcriptional Organization and Posttranscriptional Regulation of the <i>Bacillus subtilis</i> Branched-Chain Amino Acid Biosynthesis Genes (2004)

In Bacillus subtilis, the genes of the branched-chain amino acids biosynthetic pathway are organized in three genetic loci: the ilvBHC-leuABCD (ilv-leu) operon, ilvA, and ilvD. These genes, as well as ybgE, encoding a branched-chain amino acid aminotransferase, were recently demonstrated to represent direct targets of the global transcriptional regulator CodY. In the present study, the transcriptional organization and posttranscriptional regulation of these genes were analyzed. Whereas ybgE and ilvD are transcribed monocistronically, the ilvA gene forms a bicistronic operon with the downstream located ypmP gene, encoding a protein of unknown function. The ypmP gene is also directly preceded by a promoter sharing the regulatory pattern of the ilvA promoter. The ilv-leu operon revealed complex posttranscriptional regulation: three mRNA species of 8.5, 5.8, and 1.2 kb were detected. Among them, the 8.5-kb full-length primary transcript exhibits the shortest half-life (1.2 min). Endoribonucleolytic cleavage of this transcript generates the 5.8-kb mRNA, which lacks the coding sequences of the first two genes of the operon and is predicted to carry a stem-loop structure at its 5' end. This processing product has a significantly longer half-life (3 min) than the full-length precursor. The most stable transcript (half-life, 7.6 min) is the 1.2-kb mRNA generated by the processing event and exonucleolytic degradation of the large transcripts or partial transcriptional termination. This mRNA, which encompasses exclusively the ilvC coding sequence, is predicted to carry a further stable stem-loop structure at its 3' end. The very different steady-state amounts of mRNA resulting from their different stabilities are also reflected at the protein level: proteome studies revealed that the cellular amount of IlvC protein is 10-fold greater than that of the other proteins encoded by the ilv-leu operon. Therefore, differential segmental stability resulting from mRNA processing ensures the fine-tuning of the expression of the individual genes of the operon.
Synthesis of Inorganic Fullerene‐like Nanostructures by Concentrated Solar and Artificial Light (2010)

Abstract A track record of generating novel fullerene‐like and nanotubular inorganic nanostructures from Cs 2 O, SiO 2‐x , WS 2 , and MoS 2 by photothermal ablation with highly concentrated sunlight and ultra‐bright lamp light is reviewed, and augmented with new results for exfoliated MoS 2 and carbon as well as carbon nanotubes.
Concentration of bone marrow progenitor cells by separation on a Percoll gradient using the Haemonetics model 30. (1988)

To perform an optimal ex vivo bone marrow purge, it is necessary to concentrate the bone marrow progenitor cells and to eliminate both the red blood cells and the polymorphonuclear leucocytes. To achieve this goal which cannot be accomplished by using the Haemonetics model 30 alone, we used the Haemonetics model 30 and a density gradient together in a two-step procedure. In the first step we obtained the buffy coat from original bone marrow grafts and in the second we reintroduced these buffy coats into the Haemonetics bowl followed by Percoll, adjusted to 1.079 g/ml, at 5 ml/min in order to recover the light density mononuclear cells. After this second step, the mean volume of the marrow and the RBC and nucleated cell contaminations were reduced to 9%, 0.96% and 16% of their original values the unseparated bone marrow, respectively. This was far better than the values obtained after the first step (volume: 19%; RBC: 10%; nucleated cells: 54%). The CFU-GM recoveries after the first and second steps were 71% and 70% of the original samples, respectively. The entire procedure lasted between 75 and 150 min. At this time, 17 of the 24 patients whose bone marrow was separated using Percoll gradient in the Haemonetics bowl have been grafted. Thirteen of these 17 patients had an evaluable haematological recovery which was complete and rapid for all but one patient with acute myeloid leukaemia. These results demonstrate that the introduction of a density gradient into the Haemonetics model 30 bowl is possible and effective. The reduction in total volume and cell number permits ex vivo purging, without decreasing the grafting capability.
Decoy states for quantum key distribution based on decoherence-free subspaces (2008)

A quantum key distribution with decoherence-free subspaces has been proposed to overcome collective noise to the polarization modes of photons flying in quantum channels. Prototypes of this scheme have also been achieved with a parametric down-conversion source. However, the photon-number-splitting attack we propose will make practical implementations of this scheme insecure since the parametric down-conversion source may occasionally emit multiphoton pairs. We propose a decoy-state method to make these implementations immune to this attack. With this decoy-state method, both the security distance and key bit rate will be increased.
A placebo-controlled study of recombinant human granulocyte-macrophage colony-stimulating factor administered during and after induction treatment for de novo acute myelogenous leukemia in elderly patients. Groupe Ouest Est Leucémies Aiguës Myéloblastiques (GOELAM). (1998)

The complete remission (CR) rate after intensive chemotherapy for acute myelogenous leukemia (AML) remains low in elderly patients, mainly because of a higher infectious mortality rate related to neutropenia and an increased incidence of adverse prognostic factors. Granulocyte-macrophage colony-stimulating factor (GM-CSF) has been shown to potentially recruit leukemic blasts into cell cycle and improve cytotoxic effects when given during chemotherapy, and to shorten the duration of neutropenia when administered after chemotherapy. Two hundred forty patients aged 55 to 75 years who had newly diagnosed AML were randomly assigned to receive placebo or Escherichia coli-derived GM-CSF (5 micrograms/kg/d by 6-hour intravenous infusion) starting during induction chemotherapy on day 1 and continued through and after chemotherapy until recovery of neutrophils, or evidence of regrowth of leukemia, or up to day 28. Induction chemotherapy consisted of idarubicin (8 mg/m2/d on days 1 to 5) and cytarabine (100 mg/m2/d on days 1 to 7). The study drug was not administered subsequent to the induction course. Patients who achieved a CR received continuous maintenance therapy for 1 year with four quarterly reinduction courses; in the 55- to 64-year age subgroup, patients were randomly assigned to receive or not a consolidation course before maintenance therapy. The CR rate was similar in the GM-CSF and placebo groups (63% and 60.5%, respectively; P = .79). The mortality, rate of resistant disease, and rate of regrowth of leukemia were also similar in both groups. The time to neutrophil recovery was shorter in patients who received GM-CSF (24 v 29 days; P = .0001), but the incidence and characteristics of infectious events were not different. The 2-year disease-free survival (DFS) rate was significantly improved in the GM-CSF group (48% v 21% in the placebo group; P = .003). This effect was highly significant in the cohort of patients aged 55 to 64, but only marginal in patients >/=65 years of age. There was a trend toward a longer overall survival (OS) in the GM-CSF group (P = .082). In summary, the administration of GM-CSF, concomitantly with chemotherapy and thereafter during induction course in AML, shortened the time to neutrophil recovery, but did not improve the CR rate in patients aged 55 to 75. Nonetheless, DFS and OS were significantly prolonged in patients aged 55 to 64 treated with GM-CSF. These results are promising and further evaluation of myeloid growth factors in AML is warranted.
In vitro stimulation by tumour cell media of [3H]-thymidine incorporation by mouse spleen lymphocytes (1997)

Mouse spleen lymphocyte (SL) cells show a three to four-fold increase in [3H]-thymidine incorporation when incubated in tumour cell media, or in media containing tumour cell cytosol. Agarose gel chromatography of both [3H]-thymidine-labelled tumour cell media and cytosol shows a sharp peak of DNA-associated material eluting at about 60 kDa. This DNA-associated material is imported rapidly and efficiently by SL cells and is recoverable from their cytosol. The stimulating effect on SL cell thymidine incorporation resides primarily, if not exclusively, in this extruded/cytosolic 60 kDa DNA material. Tumour cells incubated in media containing normal or liver, but not tumour, cytosol show a reduced rate of [3H]-thymidine incorporation, indicating competition between normal and tumour associated DNA complexes. The results indicate that such cell-extruded DNA complexes may transmit 'genetic messages' to other cells, and are discussed in terms of interactions in the tumour-bearing host.
Views on the applicability of the internal audit standards and competencies for internal auditors : an African perspective (2013)

Through its Research Foundation, the Institute of Internal Auditors has engaged in various studies to develop\na common body of knowledge for internal auditors. These results were reported on from a global perspective;\nhowever, local context also has an influence, and there are country-specific forces that influence the\napplication of the International Standards for the Professional Practice of Internal Auditing and the core\ncompetencies needed by internal auditors. Views expressed by internal auditing stakeholders from different\ncountries on the application of the Standards and core competencies – including knowledge areas, tools and\ntechniques, technical skills, and behavioural aspects – therefore exhibit distinctive characteristics depending\non the country-specific context. This article presents an overview that highlights the African perspective and\nprovides an introduction to and overview of the articles that follow in this special edition of the Southern\nAfrican Journal of Accountability that use data extracted from the CBOK database to contrast the situation of\ninternal audit in South Africa and the rest of Africa with that of other regions internationally. This article reports\non the performance of a comparative analysis of the views of internal auditors on core competencies and the\napplication of the Standards as presented in the Institute of Internal Auditors Research Foundation’s 2010\nCBOK study’ response database. Being the first study that compares the views of internal audit stakeholders\nfrom an African perspective, it adds value by recognising that Africa consists of countries that are still\ndeveloping, and highlights the regional similarities and differences of views held by internal auditors in South\nAfrica, Ethiopia and other countries in Africa to those of selected developed countries, to show an African\nperspective on and appreciation of internal audit.
De novo synthesis of an intron by the maize transposable element Dissociation. (1994)

The mechanisms by which introns are gained or lost in the evolution of eukaryotic genes remain poorly understood. The discovery that transposable elements sometimes alter RNA splicing to allow partial or imperfect removal of the element from the primary transcripts suggests that transposons are a potential and continuing source of new introns. To date, splicing events that precisely restore the wild-type RNA sequence at the site of insertion have not been detected. Here we describe alternative RNA splicing patterns that result in precise removal of a Dissociation (Ds) insertion and one copy of its eight-nucleotide host site duplication from an exon sequence of the maize shrunken2-mutabe1 (sh2-m1) mutant. In one case, perfect splicing of Ds was associated with aberrant splicing of an intron located 32 bp upstream of the insertion site. The second transcript type was indistinguishable from wild-type mRNA, indicating that Ds was spliced like a normal intron in about 2% of the sh2-m1 transcripts. Our results suggest that the transposition of Ds into sh2 in 1968, in effect, marked the creation of a new intron in a modern eukaryotic gene. The possibility of precise intron formation by a transposable element demonstrated here may be a general phenomenon of intron formation, since consensus intron splice sites can be explained by insertions that duplicate host sequences upon integration. A model is presented.
Image quality: An analysis of improvements and degradations in a digitally‐processed large format camera photograph (1994)

Abstract A Large Format Camera photograph of the Black Hills, South Dakota was digitized and processed using several enhancement techniques and evaluated for overall quality by a team of photointerpreters. Resultant rating scores were analyzed using one‐way ANOVA models in conjuction with Tukey honestly significance difference (HSD) tests. Based on the study results, medium contrast enhancements and a 3 x 3 high‐frequency filter were determined to be processing techniques which improved the imagery; and reduction and a 3 x 3 low frequency filter were found to be techniques which degraded the imagery.
Private Domains in Networks of Information (2009)

The networking research community has started looking into so-called information-centric networks, which regard information objects as the primary elements in the network. Users store and retrieve the information objects, denoted by object identifiers, from the network without knowing or bothering which host serves the actual request, comparable to earlier initiatives in networking that separate node identifiers from network locations. The capability to address content directly takes many optimizations, such as content- optimized routing or transparent caching, to the next level, while at the same time enabling novel services. In order to prevent unauthorized access to the information objects that roam around freely in the global network, objects shall be encrypted. We argue that for some use cases, e.g. when dealing with sensitive company-internal information, a stricter partitioning of the network is required. We propose and discuss two solutions to this problem, one focusing on securing the name resolution procedure, the other concentrating on the actual retrieval. Both mechanisms complement existing proposals by separating information objects in the private network domain while maintaining global reachability.
Environmental dechlorination of PCBs (1987)

Abstract The polychlorinated biphenyls (PCBs) in sediment and/or fish samples from at least five different locations show changes in gas chromatographic (GC) peak distribution indicative of reductive dechlorination. Several different dechlorination processes, each presumably mediated by a different population of anaerobic bacteria with its own distinctive pattern of PCB congener selectivity, appear to be operating. Six of these processes have been characterized in detail as to the changes occurring in each of the 126 individual PCB congeners or isomer groups detectable by capillary GC or GC-MS on a DB-1 column. The patterns of congener reactivity indicate that the observed transformation processes fall into two broad categories: o,m,p-dechlorinations, which remove chlorine atoms from ortho, meta, and para positions, with congener reactivities primarily determined by reduction potential; and m,p-dechlorinations, which take chlorines from meta and para positions only, with relative reactivities determined mainly by molecular shape. Both types of dechlorination preferentially remove PCB congeners of toxicological concern, and both produce lower congeners that are biodegradable by environmental aerobes. Thus, dechlorination in anaerobic sediments permits the detoxification and eventual degradation of environmental PCBs.
ChemInform Abstract: REACTIONS OF AMINOPHOSPHINES WITH CARBON DIOXIDE, CARBONYL SULFIDE, AND CARBON DISULFIDE. CRYSTAL AND MOLECULAR STRUCTURE OF A SEVEN‐COORDINATE TRIS(DITHIOCARBAMATO) COMPLEX OF PHOSPHORUS(III) (1981)

Abstract Die Reaktionen der Aminophosphine (II), (IV), (X), (XI) und (XII) mit CO 2 , COS und CS 2 in verschiedenen molaren Verhältnissen bei Raumtemp. ohne Lösungsmittel werden untersucht.
Crystallization of Amorphous Silicon Thin Films Using a Viscous Nickel Solution (2001)

A viscous Ni solution was applied on amorphous Si films and its effect on the crystallization of amorphous Si films was investigated. A viscous Ni solution was prepared by dissolving in 1 N HCl and mixing it with propylene glycol. and Ni was uniformly deposited by spin coating and drying the viscous metal solution, and it enhanced the crystallization at lower temperature overcoming the nonuniform coating of diluted acid metal solution. The a-Si films deposited by low pressure chemical vapor deposition with were fully crystallized in 10 h at 500°C by furnace annealing and in 8 h at 480°C by microwave annealing. The enhanced crystallization was due to the mediation by The surface roughness of the crystallized Si films using the Ni solution was smoother than that of the crystallized Si films with Ni metal layer. © 2001 The Electrochemical Society. All rights reserved.
C4NP Cu-cored Pb-free flip chip interconnections (2008)

We report here preliminary results on a new Cu-cored flip chip structure combining C4NP (Controlled Collapse Chip Connect New Process) with Cu spheres for high density interconnections. C4NP is a new wafer bumping technology developed by IBM in which molten solder is injected into a mold and then transferred to the UBM (Under Bump Metallurgy) pads on the wafer. This simple and parallel process has shown the capability to combine low cost attributes with high performance capabilities. C4NP allows a larger number of interconnections with finer pitch than screen printing methods because it eliminates the volume reduction problem of solder paste. Also, C4NP allows more freedom in selecting the composition of solder bumps when compared with the electroplating method.