gebhart/patrepeval huggingface dataset:
Attitude determination and control of Clementine during lunar mapping (1996)

The Clementine spacecraft, launched in early 1994, recently completed a two-month lunar mapping mission in which it recorded high-resolution images over the entire surface of the moon. The attitude determination and control subsystems developed for the mapping phase of the mission are described. The vehicle's attitude determination subsystem consisted of a simple fixed-gain Kalman filter, uncoupled about each spacecraft axis, combining rate inputs from two solid-state optical gyros and attitude inputs from two wide field-of-view star trackers. The attitude control subsystem consisted of a simple proportional-integral-derivative algorithm operating on quaternion and rate feedback signals to provide pointing, tracking, and slewing functions. The primary actuating devices were three reaction wheels used for feedback error compensation and 12 thrusters used for occasional momentum dumping. During lunar mapping the attitude determination and control subsystems maintained vehicle pointing to within a three-axis rss value of 0.05 deg. On-orbit results are provided from outputs of the attitude determination filter, the lunar nadir-tracking controller, and the large-angle slew generator. Additionally, results are provided from a novel inertia estimator, which utilized sensor outputs during two slew maneuvers.
2,3‐Dihydroporphycen – ein Analogon des Chlorins (1987)

Konstitutionsisomere mit ähnlichen Bindungsverhältnissen und ähnlicher π‐Elektronenstruktur sind 2,3‐Dihydroporphycen 1 und 2,3‐Dihydroporphyrin, das unter anderem als Stammverbindung des Chlorophylls interessiert. 1 kann durch Hydrierung von Porphycen erhalten werden. magnified image
EYES ON IONIC LIQUIDS (2000)

RETURN TO ISSUEPREVNewsNEXTEYES ON IONIC LIQUIDSNATO workshop examines the industrial potential of green chemistry using room-temperature 'designer solvents'MICHAEL FREEMANTLEView Author Information C&EN LondonCite this: Chem. Eng. News 2000, 78, 20, 37–50Publication Date (Print):May 15, 2000Publication History Published online12 November 2010Published inissue 15 May 2000https://pubs.acs.org/doi/10.1021/cen-v078n020.p037https://doi.org/10.1021/cen-v078n020.p037newsACS PublicationsCopyright © 2000 AMERICAN CHEMICAL SOCIETYArticle Views54Altmetric-Citations113LEARN 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 SUBJECTS:Salts,Solvents Get e-Alerts
The clinical significance of carcinoembryonic antigen in the plasma and tumors of patients with gynecologic malignancies (1978)

Carcinoembryonic antigen is elevated in the plasma of approximately 30% of patients with endometrial adenocarcinoma, 50% of patients with ovarian carcinoma, and 60% of patients with cervical carcinoma. The incidence of elevated plasma CEA is directly related to stage of disease, and in ovarian cancer to cell type. Immunodiffusion and immunoelectrophoretic studies have indicated that CEA from ovarian and cervical cancers is similar to colonic cancer CEA. Tumor staining for CEA by the immunoperoxidase method (indicating a CEA concentration of ≥ 3.0 μ/g tissue) is positive in about one-half of the patients with elevated plasma CEA levels. However, there is no definite relationship between tumor and plasma antigen levels. Carcinoembryonic antigen levels characteristically return to normal within 8 weeks following complete surgical removal of tumor. In contrast, antigenemia often persists up to 4 months following curative radiation therapy. A progressive rise in plasma CEA has preceded clinical diagnosis of recurrence in about half of the patients studied. Serial plasma CEA determinations in patients whose plasma or tumors initially contain elevated amounts of antigen provides information concerning the biologic behavior of malignancy which may be of clinical significance to the patient.
Photocatalytic Reduction of CO<sub>2</sub> with H<sub>2</sub>O on Titanium Oxides Anchored within Micropores of Zeolites:  Effects of the Structure of the Active Sites and the Addition of Pt (1997)

Titanium oxide species anchored within the Y-zeolite cavities by an ion-exchange method exhibit a high and unique photocatalytic reactivity for the reduction of CO2 with H2O at 328 K with a high selectivity for the formation of CH3OH in the gas phase. The in situ photoluminescence, ESR, diffuse reflectance absorption, and XAFS (XANES and FT-EXAFS) investigations indicate that the titanium oxide species are highly dispersed within the zeolite cavities and exist in a tetrahedral coordination. The charge transfer excited state of the anchored titanium oxide species plays a significant role in the reduction of CO2 with H2O with a high selectivity for the formation of CH3OH, while the catalysts involving the aggregated octahedrally coordinated titanium oxide species show a high selectivity to produce CH4, being similar to reactions on the powdered TiO2 catalysts. The addition of Pt to the anchored titanium oxide catalysts promotes the charge separation which leads to an increase in the CH4 yields in place of CH3OH formation.
Synthesis and Characterization of an Isolable Base‐Stabilized Silacycloprop‐1‐ylidene (2012)

Strained but stable: An isolable silacycloprop-1-ylidene stabilized by intramolecular complexation with an iminophosphorus ylide fragment was successfully synthesized and fully characterized. The formation of this small highly strained cyclic silylene involves an unprecedented SiIV→SiII rearrangement under very mild conditions. 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.
Nocardicin A: stereochemical and biomimetic studies of monocyclic β-lactam formation (1983)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNocardicin A: stereochemical and biomimetic studies of monocyclic β-lactam formationCraig A. Townsend, Alethia M. Brown, and Loan T. NguyenCite this: J. Am. Chem. Soc. 1983, 105, 4, 919–927Publication Date (Print):February 1, 1983Publication History Published online1 May 2002Published inissue 1 February 1983https://pubs.acs.org/doi/10.1021/ja00342a047https://doi.org/10.1021/ja00342a047research-articleACS PublicationsRequest reuse permissionsArticle Views374Altmetric-Citations35LEARN 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
Examining the Logic of World Federal Government (1974)

This DOI is not currently attached to any metadata records. DOIs can’t actually ever be deleted (they’re persistent), but sometimes our members create DOIs in error. We do have a process to approximate deletion which we follow only in rare cases where the DOI has been genuinely created in error, and most crucially, if the DOI has never been published anywhere online or in print and never otherwise distributed to or communicated with anyone (authors, readers, reviewers, etc.
Alpha<sub>1</sub>-Antitrypsin Deficiency (1978)

Relation of the Defect to Pulmonary DiseaseIt is clear that severely deficient subjects of phenotype PiZ and probably PiSZ are much more susceptible to the development of emphysema or chronic bronchitis (or both) than the general population, the large majority of whom are of phenotype PiM.57,58 The continuing question has been whether those with lesser degrees of deficiency, mainly PiMZ or PiMS, are at any greater risk for the development of such obstructive lung diseases than those of phenotype PiM.Initially, the problem was attacked by measurement of alpha1-antitrypsin levels in groups of patients with pulmonary diseases, but the . . .
Formation and Properties of Poly (vinyl butyral-co-vinyl alcohol-co-vinyl acetate) / Polystyrene Composites Reinforced with Graphene Oxide-Nanodiamond (2014)

A facile and cost-effective method was used to prepare poly(vinyl butyral-co-vinyl alcohol-co-vinyl acetate) (PVBVA)/polystyrene (PS)/graphene oxide (GO) and graphene oxide-nanodiamond (GO-ND)-based nanocomposites. Formation of GO, nanodiamond functionalization of GO and nanocomposite structure were confirmed using FTIR. SEM imaging of GO, GO-ND and PVBVA/PS/GO-ND nanocomposites revealed significant results. The results revealed that nanodiamond functional GO platelets were fully incorporated into matrix. Mechanical studies depicted higher tensile strength (31.6-35.1 MPa) for PVBVA/PS/GO-ND nanocomposites compared with PVBVA/PS/GO without nanodiamonds (22.1-28.3 MPa). Thermogravimetric analysis showed higher 10% degradation temperature for nano-bifiller reinforced PVBVA/PS/ GO-ND 0.1-5 as 532-554oC. Limiting oxygen index and UL 94 results depicted that PVBVA/PS/GO-ND 0.1-5 had increased non-flammability (V-1 rating) with GO-ND loading. GO-ND loading also showed electrical conductivity improvement (1.8-2.5 Scm -1 ) relative to PVBVA/PS/GO materials (10 -2 -1.3 Scm -1 ).
Regulation of the Discoidin I gamma gene in Dictyostelium discoideum: identification of individual promoter elements mediating induction of transcription and repression by cyclic AMP. (1990)

We dissected the promoter of the developmentally induced and cyclic AMP-repressed discoidin I gamma gene and identified a sequence element essential for developmental induction. Transfer of the element to an inactive heterologous promoter demonstrated that this sequence is sufficient to confer expression in axenically growing cells and to induce gene activity in development after growth on bacteria. A 16-base-pair sequence within this element was shown to be sufficient for induction in the discoidin promoter context and was used to reactivate different truncated promoter constructs. This led to the localization of an element necessary for down regulation of gene expression by extracellular cyclic AMP.
(—)Deprenyl Increases the Life Span as Well as Activities of Superoxide Dismutase and Catalase but Not of Glutathione Peroxidase in Selective Brain Regions in Fischer Rats (1994)

(-)Deprenyl, a MAO-B inhibitor that is also known to be effective for symptoms of Parkinson's disease, when injected subcutaneously (sc) in male Fischer-344 rats at a dose of 0.5 mg/kg per day (3 times a week) from 18 months of age, significantly increased the remaining life expectancy. The average life span after 24 months was 34% greater in treated rats than in saline-treated control animals. Furthermore, a short-term (3 wk) continuous sc infusion of deprenyl significantly increased activities of superoxide dismutase and catalase but not of glutathione peroxidase in selective brain regions such as s. nigra, striatum, and cerebral cortex, but not in hippocampus or cerebellum, or the liver. The optimal dose for increasing these activities, however, differed greatly depending on the sex and age of animals, with a 10-fold lower value for young female than male rats. Interestingly, aging caused an increase and a decrease in the optimal dose in female and male rats, respectively. In addition, treatment for a longer term tended to reduce the optimal dosage in the same animal group. The results clearly demonstrate that deprenyl increases antioxidant enzyme activities in selective brain regions. If this effect of deprenyl is causally related to its life-prolonging effect, the dosage to be used for any life span study would be a critical factor, with the dosage differing widely depending on sex, age of animal, and mode and duration of drug administration.
Measurement of acoustic modes and wall impedance in a turbofan exhaust duct (1983)

Acoustic measurements made with in-duct modal probes show how individual acoustic modes, as generated by fan/stator interaction, interact with a well-characterized liner. This measured attenuation provides a critical test for predicted attenuation as developed from the theoretical analysis of sound propagation in annular ducts with treatment and sheared flow. The primary investigations took place in the exhaust duct of a model fan mounted in an anechoic chamber. The results presented include induct attenuation, sound power attenuation as measured in the far field, and in-situ acoustic impedance measurements of the treated wall sections. Good theory/experiment agreement was found; the differences of treatment suppression between theory and measured values differed at most by 2.7 dB.
Effects of Inoculum Size on Solid-Phase Fermentation of Fodder Beets for Fuel Ethanol Production (1986)

This fuel ethanol study examined the effects of Saccharomyces cerevisiae inoculum size on solid-phase fermentation of fodder beet pulp. A 5% inoculum (wt/wt) resulted in rapid yeast and ethanol (9.1% [vol/vol]) production. Higher inocula showed no advantages. Lower inocula resulted in lowered final yeast populations and increased fermentation times.
A cDNA clone coding for a novel allergen, <i>Cla h</i> III, of <i>Cladosporium herbarum</i> identified as a ribosomal P2 protein. (1995)

Mold allergens represent a major cause of atopic disorders. Progress in the molecular characterization of allergens has been hampered by batch-to-batch variation and poor yields in mold extracts. In the present study, we established a cDNA library in lambda ZAP II by using mRNA isolated from a major allergen-producing mold, Cladosporium herbarum. From this library, a novel allergen has been cloned and sequenced. The clone encodes a full length protein of 111 amino acids with a molecular mass of 11.1 kDa and pI of 3.94. By using sequence homology analysis, the allergen was found to belong to the ribosomal P2 protein family. Approximately 60% peptide sequence homology was found between the cloned protein and other known fungal ribosomal P2 proteins. In addition to conserved C-terminal sequences and serine blocks for phosphorylation in all eukaryotic ribosomal P2 proteins, this protein also contains a potential N-glycosylation site at position 15-17. Northern blots demonstrated that mRNA molecules of this gene are present even at late stages of culture. The gene was expressed in Escherichia coli by using the pMAL-2c system, and murine antisera against the recombinant allergen (rCh2.1) were generated. The antisera revealed that the native allergen corresponding to rCh2.1 was present in extracts prepared by grinding mycelia under liquid nitrogen in the presence of protease inhibitors, but absent in extracts prepared by conventional methods. This result indicates the usefulness of recombinant allergens in characterization and standardization of mold allergenic extracts.
Software Defined Radio: Architectures, Systems and Functions (2003)

The Wiley Series in Software Radio aims to present an up-to-date and in-depth picture of the technologies, potential implementations and applications of software radio. Books in the series will reflect the strong and growing interest in this subject. The series is intended to appeal to a global industrial audience within the mobile and personal telecommunications industry, related industries such as broadcasting, satellite communications and wired telecommunications, researchers in academia and insutry, and senior undergraduate and postrgraduate students in computer science and electronic engineering.
A Survey of Recent Graduates of the Stanford Teacher Education Program. (1991)

The state of teacher training in this country is a topic of intense interest. At Stanford University, teacher training is carried out through the Stanford Teacher Education Program (STEP). However, little if any research has been conducted which can inform us of the career paths taken and decisions made by recent graduates of STEP. This paper highlights some of the findings from a Survey of Recent STEP Graduates, in particular, the significant influences on the career paths chosen by new teachers. In the Autumn of 1987, the Stanford School of Education, under the direction of the dean, sought to answer some of the questions which persisted about the occupational choices of recent STEP alumni. Some of these questions ^^were: How many graduates are cur rently high school teachers? Of those John W.Young is an assistant prowho leave teachin what reasons do fessor of educational statistics and th ive for thejr dedsion? How measurement. Department of Educai ? * u u c u , r, i i /t » . iy » , long do they teach betore changing tional Psychology, Graduate School ,* ^, significant deter of Education, Rutgers University, tie'dswat are the significant deter New Brunswick, New Jersey. The minants of career choice? research reported on in this article ^ survey> three pages in length, was conducted while he was a gradwas designed and sent to all mem uate student at the School of Educa^ers ^'ve most recent STEP tion, Stanford University. graduating classes (1983 through 1987, inclusive) for whom a valid
Formulation design, challenges, and development considerations for fixed dose combination (FDC) of oral solid dosage forms (2012)

Fixed dose combination (FDC) products are common in the treatment of hypertension, diabetes, human immunodeficiency virus, and tuberculosis. They make it possible to combine two or more drug molecules with different modes of pharmacological actions in a single dosing unit and optimize the treatment. From a patient perspective, they offer convenience, reduced dosing unit burden, and cost savings. From a clinical perspective, aging population in developed countries will need multiple medications to treat age related diseases and co-morbidities. FDC products simplify dosing regimen and enhance patient compliance. As outlined in the article, the number of FDC products has grown over the years and the trend is likely to continue. This review article gives an overview to pharmaceutical scientists about recent trends in the formulation development of the FDC products and provides decision trees to select most optimum formulation development strategy. While some formulation technologies such as multi-layer tablets, multiparticulate systems, active film coating, and hot-melt granulation are discussed in more detail, a few specialized technologies are also introduced briefly to the readers.
A System for Genetic Change in Apomictic Eastern Gamagrass (1996)

The ability of a species to undergo genetic change is a necessary component of its adaptive evolution, which can lead to the widening or narrowing of its genetic base. In diplosporous apomictic species, change through sexual or meiotic means is limited or omitted entirely. The objective of this study was to investigate the reproductive attributes of tetraploid apomictic eastern gamagrass, Tripsacum dactyloides var. dactyloides (L.) L. One‐hundred progeny generated from an apomictic tetraploid eastern gamagrass accession were evaluated at a phenotypic, cytogenetic, and molecular level by means of random amplified polymorphic DNA (RAPD) procedures to detect their genetic relatedness to the maternal parent and to each other. Differences in phenotype and RAPD‐PCR (polymerase chain reaction) banding profiles, followed by chromosome counts, revealed the generation of new tetraploid variants. The identification of genetic variation in tetraploid progeny would presumably indicate the production of hybrid individuals generated from the fertilization of a reduced egg cell by a sperm nuclei. However, this study indicates the complete omission of hybrid individuals generated from expected normal sexual behaviors and suggests the observed variation is generated by an incomplete or dysfunctional sexual process. The incidence of this behavior was 4%. The detection and generation of genetically variable but cytologically stable tetraploids, from an apomictic eastern gamagrass, suggests the presence of an additional mechanism whereby this species routinely may undergo genetic change without the introduction of new germplasm.
Viral Aspects of Protein Phosphorylation (1988)

The discovery that the protein encoded by the transforming gene of Rous sarcoma virus (RSV) has protein kinase activity (Collett & Erikson, 1978) brought the subject of protein phosphorylation to the general attention of virologists. Retrovirus protein kinases have been extensively reviewed (e.g. Sefton, 1985; Hunter & Cooper, 1986) and, therefore, will only be dealt with briefly here. The main focus of the present review is the changes in phosphorylation that can occur during productive infection of cells by viruses, a topic that has received less widespread attention. In this context, we shall survey the phosphorylation of both viral and cellular proteins, assess the evidence regarding the functional significance of these phosphorylations, and consider the extent to which protein kinases encoded by virus or host are responsible for them. As we imagine that many of our readers may know less about protein kinases than they do about viruses, we have prefaced our review with a brief account of cellular protein kinases and protein phosphorylation.
PAI-S/K: A robust automatic seismic P phase arrival identification scheme (2002)

The automatic and accurate P phase arrival identification is a fundamental problem for seismologists worldwide. Several approaches have been reported in the literature, but most of them only selectively deal with the problem and are severely affected by noise presence. In this paper, a new approach based on higher-order statistics (HOS) is introduced that overcomes the subjectivity of human intervention and eliminates the noise factor. By using skewness and kurtosis, two algorithms have been formed, namely, Phase Arrival Identification-Skewness/Kurtosis (PAI-S/K), and some advantages have been gained over the usual approaches, resulting in the automatic identification of the transition from Gaussianity to non-Gaussianity that coincides with the onset of the seismic event, despite noise presence. Experimental results on real seismic data, gathered by the Seismological Network of the Department of Geophysics of Aristotle University, demonstrate an excellent performance of the PAI-S/K scheme, regarding both accuracy and noise robustness. The simplicity of the proposed method makes it an attractive candidate for huge seismic data assessment in a real-time context.