gebhart/patrepeval huggingface dataset:
Sources of Basal Pennsylvanian Sediments in the Eastern Interior Basin: 3. Some Methodological Implications (1956)

Available evidence strongly suggests that many ancient clastic rocks show markedly preferred directions of sediment transport. Statistical analysis is useful in studying such transport systems because it can segregate local, intermediate, and regional variability. On the local and intermediate sampling levels current variability depends on the local hydrodynamic regimen. Tectonics, however, is the fundamental control for both wide lateral and thick vertical persistence of flow pattern. In all fluvial and argillaceous marine sands, regional field mapping of appropriate sedimentary structures indicates the regional slope without ambiguity. In the clean marine-shelf sands available evidence for a regional-slope interpretation is scanty, and, although such a hypothesis seems highly plausible for many ancient sediments, further studies of directional structures in marine-shelf deposits are required. Because regional petrology distinguishes regional mineral associations, it helps confirm sedimentary transport flow patterns in rocks of uncertain environmental origin as well as making possible additional source-area inferences. Both the number of samples and the pétrographie measures required depend on regional variability and sediment maturity. In the more mature sediments, contrasts in mineral associations probably are less pronounced, and the need for more refined measures and statistical tests of significance becomes greater. Although some problems still remain, it is believed that a combined regional study of directional structures and sedimentary petrology, supplemented by appropriate statistical techniques, makes possible a relatively simple and rapid provenance methodology that has general applicability to sediments of all ages in a wide range of depositional environments.
Color correction for an image sequence (1995)

The color correction technique presented constructs a mapping from the registered overlapping regions of two adjacent images in an image sequence. The method involves two main steps. In the first step we use multiple regression to find the relationship between the registered overlapping regions of two adjacent images in the sequence. We then use the derived mapping to correct the color in one image so that it matches the adjacent image. After describing the basic method and discussing strategies far dealing with specific problems that arise, we present and analyze relevant test results.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Multilevel regulation of histone gene expression during the cell cycle in tobacco cells (1998)

The respective involvement of transcriptional and post-transcriptional mechanisms in coupling H3 and H4 histone gene expression to the S phase of the cell cycle has been studied in synchronized tobacco cells. Induction of histone gene expression at the G1/S transition is shown to be essentially directed by an increase in the transcription rate in response to cellular signals occurring at the initiation step of DNA replication. Histone gene induction thus precedes the burst of DNA synthesis. However, when the elongation step of DNA replication is ineffective or artificially arrested, feedback mechanisms apparently act at the translation level to avoid overproduction of histone proteins from their mRNAs. At the end of S phase, post-transcriptional mechanisms ensure a rapid degradation of histone mRNAs. Transcription factors are bound to the cis -elements of histone promoters throughout the cell cycle, thus suggesting a post-translational modification of some of them to trigger promoter activation at the G1/S transition. Based on these results, a model is proposed for histone gene transcriptional induction in connection with the components of the cell cycle machinery.
Preparation of cis-3,4-ureyleneselenophane (1975)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of cis-3,4-ureyleneselenophaneR. L. Martin and B. E. NorcrossCite this: J. Org. Chem. 1975, 40, 4, 523–524Publication Date (Print):February 1, 1975Publication History Published online1 May 2002Published inissue 1 February 1975https://pubs.acs.org/doi/10.1021/jo00892a037https://doi.org/10.1021/jo00892a037research-articleACS PublicationsRequest reuse permissionsArticle Views77Altmetric-Citations8LEARN 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
Demonstration of the inhibitory effect of human alpha-fetoprotein on in vitro transformation of human lymphocytes. (1976)

We have studied the effects of human alpha-fetoprotein (HAFP), isolated from the serum and ascitic fluid of a hepatoma-bearing patient, on the in vitro transformation of human peripheral blood lymphocytes by a variety of mitogenic stimuli. At a concentration of 2.5 mg/ml, HAFP inhibited the lymphocyte response to phytohemagglutinin, concanavalin A, and rabbit anti-human thymocyte serum, but failed to inhibit the response to pokeweed mitogen. HAFP was able to inhibit the one-way mixed lymphocyte culture at concentrations of 250-500 mug/ml, but failed to inhibit at 100 mug/ml. Exposure of lymphocytes to 2.2 mg/ml of HAFP for 18 hr did not result in significant lymphocytotoxicity, and such cells washed free of HAFP were fully capable of participating in the mixed lymphocyte culture. HAFP did not inhibit lymphocyte E-rosette formation. Fetal HAFP was more effective in inhibiting human lymphocyte responses than hepatoma HAFP. These experiments support the suggestion that HAFP plays an important immunoregulatory role during fetal development, possibly through the suppression of thymus-derived lymphocyte responses to antigenic stimuli; they also suggest that there are important differences in the biological properties of hepatoma and fetal HAFP.
Profil Kemampuan Representasi Siswa Dalam Memecahkan Masalah Matematika Ditinjau Dari Gaya Belajar (2021)

This study aims to determaine the profile of the representation ability of juniorhigh school students in terms of learning styles. This type of research wasdescriptive qualitative research. The subjects taken were three junior highschool students of eight grade, each of whom had a visual learning style, andauditory learning style, and kinesthetic learning style. The data was collectedusing a learning style scale, written tests, interviews and documentation. Thedata analysis technique was carried out in 3 stages, reduction, datapresentation, and drawing conclucions or verification. The validity of the dataused time triangulation, comparaing the results of the representation abilitytest with the results of interviews in the first and second stages. The analysiswas developed based on indicators of representational ability by taking inroaccount student learning styles. Based on the results of the analysis, it isknown that subjects with visual, auditory and kinesthetic learning styles havelow verbal representation abilities.
Integrated Optics On Silicon Substrate : A Way To Achieve Complex Optical Circuits (1986)

We describe the planar technology used on silicon substrate to achieve two special devices : a folded optical spectrum analyser featuring 500 MHz bandwith and a Michelson interferometer used as a vibration sensor.
Reduced Heart Rate Variability in Ischemic Heart Disease Is Only Partially Caused by Ischemia (2000)

Patients with uncomplicated angina had reduced HRV, mainly affecting vagal activity, but normal low frequency variability associated with mortality. Complete revascularization caused a partial normalization of vagal modulation indicating that ischemia may be one of but not the only mechanism of the HRV reduction in uncomplicated chronic coronary artery disease.
Asymmetric Synthesis of (<i>S</i>)‐2‐Indolinecarboxylic Acid by Combining Biocatalysis and Homogeneous Catalysis (2011)

A tale of two catalysts: (S)-2-Indolinecarboxylic acid, an intermediate for ACE inhibitors, was until recently produced by Fischer indole synthesis and classical resolution in seven steps. However, Perkin condensation to form ortho-chlorocinnamic acid, which is converted to (S)-ortho-chlorophenylalanine using the enzyme phenylalanine ammonia lyase prior to copper-catalyzed ring closure thereof delivers the enantiopure product in just three steps.
P-hacking (2017)

Due to increasing rate of research articles getting published in recent times, medical science is evolving very fast. Open access policies of the journals make information easily available to the stakeholders for building future research proposal. Blindly having faith in whatever is published in the literature is detrimental for science; however, it is hard to find out the correctness of the data analysis.
High-quality dual-gate PMOS devices in local overgrowth (LOG) (1989)

A new SOI technology is introduced with enhanced device performance and small geometries. The low-impurity crystalline SOI film is produced by local overgrowth (LOG) over an oxide, an important alternative to recrystallised silicon films for 3D-CMOS and SOI circuits. This technology was developed from epitaxial lateral overgrowth (ELO), to allow the use of the substrate as an interconnect layer and to enable access to submerged gates. Surface-channel mobilities are measured to be 165cm2/V s for PMOS devices built on top of the overgrowth and 160cm2/V s for devices with a submerged gate. The structures produced by LOG arc planar and allow for further stacking of devices.
Tissue-type mapping of gliomas (2018)

<sup>1</sup>H MRSI can label tumour tissue types to enable development of a mMRI tissue type mapping algorithm, with potential to aid management of patients with glial tumours.
Synthetic peptides define critical contacts between elongin C, elongin B, and the von Hippel-Lindau protein (1999)

The von Hippel-Lindau tumor suppressor protein (pVHL) negatively regulates hypoxia-inducible mRNAs such as the mRNA encoding vascular endothelial growth factor (VEGF). This activity has been linked to its ability to form multimeric complexes that contain elongin C, elongin B, and Cul2. To understand this process in greater detail, we performed a series of in vitro binding assays using pVHL, elongin B, and elongin C variants as well as synthetic peptide competitors derived from pVHL or elongin C. A subdomain of elongin C (residues 17-50) was necessary and sufficient for detectable binding to elongin B. In contrast, elongin B residues required for binding to elongin C were not confined to a discrete colinear domain. We found that the pVHL (residues 157-171) is necessary and sufficient for binding to elongin C in vitro and is frequently mutated in families with VHL disease. These mutations preferentially involve residues that directly bind to elongin C and/or alter the conformation of pVHL such that binding to elongin C is at least partially diminished. These results are consistent with the view that diminished binding of pVHL to the elongins plays a causal role in VHL disease.
Studies of electroless nickel-phosphorus plating on poly-ester plastic (2002)

Electroless nickel-phosphorus plating process on the substrate of poly-ester plastic was studied. Medium to high phosphorus content deposit could be obtained. The influences of solution components on deposit properties were discussed and the operating parameters were also optimized.
A Spatial Error Concealment Technique Using Edge-Oriented Interpolation (2005)

This paper introduces a spatial error concealment technique using directional interpolation in block-based compression. The first step involves finding the spatial direction vectors represented an edge-direction in the lost block using spatial boundary matching algorithm. Then, the error blocks are recovered by directional interpolation through these vectors and concealed by using the recovered blocks which have lower directional boundary matching error out of them relatively. This proposed method is able to deal with errors on macroblock or slice level adaptively. And it has lower complexity and maintains better performance compared to the conventional methods.
3D sheath flow using hydrodynamic position control of the sample flow (2007)

3D sheath flow was realized using hydrodynamic position control of the sample flow. The symmetric microgrooves formed on the channel walls were utilized to generate local directional streams. The sample introduced into the grooved area was shifted to the center region of the microchannel, and 3D sheath flow was formed passively. Using CFD (computational fluid dynamics) simulation, the flow shift area was designed to achieve 3D sheath flow no longer than 500 µm in channel length. Sample flow shift behavior was observed by using a confocal microscope. Since the structure of the inlets was very simple, it was possible to fabricate an in-plane multi-sample 3D sheath flow device. As a demonstration, a two-sample 3D sheath flow device was fabricated. The separated two-sample 3D sheath flow configuration was clearly observed.
Ferromagnetic Self-Regulating Reheatable Thermal Rod Implants for <i>in Situ</i> Tissue Ablation (2002)

Ferromagnetic rods, when properly aligned in a magnetic field, create well-defined areas of necrosis. There are no skip areas of viable tissue within the treated area, and there is a precipitous fall-off of injury just outside the area of treatment. Also, because the rods can be reactivated at any time, recurrent lesions within the same site can be treated. This form of minimally invasive in situ ablative therapy appears promising. Clinical trials in the kidney and in other abdominal and pelvic organs are pending.
The Parameter Space of Graphene Chemical Vapor Deposition on Polycrystalline Cu (2012)

A systematic study of the parameter space of graphene chemical vapor deposition (CVD) on polycrystalline Cu foils is presented, aiming at a more fundamental process rationale in particular regarding the choice of carbon precursor and mitigation of Cu sublimation. CH4 as precursor requires H2 dilution and temperatures ≥1000 °C to keep the Cu surface reduced and yield a high-quality, complete monolayer graphene coverage. The H2 atmosphere etches as-grown graphene; hence, maintaining a balanced CH4/H2 ratio is critical. Such balance is more easily achieved at low-pressure conditions, at which however Cu sublimation reaches deleterious levels. In contrast, C6H6 as precursor requires no reactive diluent and consistently gives similar graphene quality at 100–150 °C lower temperatures. The lower process temperature and more robust processing conditions allow the problem of Cu sublimation to be effectively addressed. Graphene formation is not inherently self-limited to a monolayer for any of the precursors. Rather, the higher the supplied carbon chemical potential, the higher the likelihood of film inhomogeneity and primary and secondary multilayer graphene nucleation. For the latter, domain boundaries of the inherently polycrystalline CVD graphene offer pathways for a continued carbon supply to the catalyst. Graphene formation is significantly affected by the Cu crystallography; i.e., the evolution of microstructure and texture of the catalyst template form an integral part of the CVD process.
Sleep quality and the treatment of intestinal microbiota imbalance in Chronic Fatigue Syndrome: A pilot study (2015)

Chronic Fatigue Syndrome (CFS) is a multisystem illness, which may be associated with imbalances in gut microbiota. This study builds on recent evidence that sleep may be influenced by gut microbiota, by assessing whether changes to microbiota in a clinical population known to have both poor sleep and high rates of colonization with gram-positive faecal Streptococcus, can improve sleep. Twenty-one CFS participants completed a 22- day open label trial. Faecal microbiota analysis was performed at baseline and at the end of the trial. Participants were administered erythromycin 400 mg b.d. for 6 days. Actigraphy and questionnaires were used to monitor sleep, symptoms and mood. Changes in patients who showed a clinically significant change in faecal Streptococcus after treatment (responders; defined as post-therapy distribution<6%) were compared to participants who did not respond to treatment. In the seven responders, there was a significant increase in actigraphic total sleep time (p=0.028) from baseline to follow up, compared with non-responders. Improved vigour scores were associated with a lower Streptococcus count (ρ=-0.90, p=0.037). For both the responders and the whole group, poorer mood was associated with higher Lactobacillus. Short term antibiotic treatment appears to be insufficient to effect sustainable changes in the gut ecosystem in most CFS participants. Some improvement in objective sleep parameters and mood were found in participants with reduced levels of gram-positive gut microbiota after antibiotic treatment, which is encouraging. Further study of possible links between gut microorganisms and sleep and mood disturbances is warranted.
Effects of capsaicin and 5‐HT<sub>3</sub>antagonists on 5‐hydroxytryptamine‐evoked release of calcitonin gene‐related peptide in the guinea‐pig heart (1993)

1. The effect of 5-hydroxytryptamine (5-HT) on the release of calcitonin gene-related peptide (CGRP) was studied directly in the isolated perfused heart and indirectly in the isolated left atria of guinea-pig. 2. 5-HT injection into the guinea-pig isolated and perfused heart evoked a dose-dependent (1-100 microM) release of CGRP-like immunoreactivity (LI) that was abolished by in vitro pretreatment with capsaicin and was not affected by indomethacin. 3. Chlorophenyldiguanide (CPD, 100 microM), but not 8-hydroxy-dipropylaminotetralin (8-OH-DPAT, 100 microM), sumatriptan (100 microM) or 1-(2,5-dimethoxy-4-iodophenyl)-2-aminopropane (DOI, 100 microM) evoked a release of CGRP-LI. Ondansetron (10 microM) or ICS205-930 (20 microM) completely abolished the 5-HT (100 microM)-evoked CGRP-LI release. 4. In the isolated electrically driven left atria of the guinea-pig 5-HT (1-10 microM) and CPD (3-100 microM) produced a positive inotropic response, which was abolished by capsaicin pretreatment. 8-OH-DPAT (10 microM) and DOI (10 microM) were inactive. Ondansetron inhibited the response to 5-HT with a pA2 of 6.50 (CL 6.08-6.91). 5. It is concluded that 5-HT causes a release of CGRP in the whole heart and a positive inotropic response in the isolated atria of guinea-pig. Both these effects are sensitive to capsaicin pretreatment and to 5-HT3 antagonists.
Subdural grid implantation for intracranial EEG recording: CT and MR appearance. (1998)

Because of extensive streak artifacts, CT showed only gross complications, such as herniation and grid displacement by extraaxial collections. MR imaging artifacts were more localized, allowing superior evaluation of subdural EEG grid placement and associated complications.
Xenophobia online: unmasking Singaporean attitudes towards ‘foreign talent’ migrants (2013)

In recent years, Singaporeans have become highly anxious about the future of their country and their own personal livelihood due to the influx of educated and professional migrants known as ‘foreign talent’ and express their ire at the presence of these migrants through xenophobic posts online. This article suggests that such comments, however, are indicative of the feelings of disillusionment and abandonment Singaporeans have towards the People's Action Party – the only government Singaporeans have ever known. While Singaporeans have been critical of their government on economic issues that impact their lifestyle and existence, it is the presence of foreign talent migrants that have pushed Singaporeans into using the migrant situation to emotively express their opinions of disappointment in the government and its policies online like no other issue, functioning as the unlikely glue that has galvanised and united an ethnically disparate Singaporean population.
Integrated photonic reservoir computing based on hierarchical time-multiplexing structure (2014)

An integrated photonic reservoir computing (RC) based on hierarchical time-multiplexing structure is proposed by numerical simulations. A micro-ring array (MRA) is employed as a typical time delay implementation of RC. At the output port of the MRA, a secondary time-multiplexing is achieved by multi-mode interference (MMI) splitter and delay line array. This hierarchical time-multiplexing structure can ensure a large reservoir size with fast processing speed. Simulation results indicate that the proposed RC system yields better performance than previously reported ones. The achieved normalized mean square error between the system output and target sequence are 0.5% and 2.7% for signal classification and chaotic time series prediction, respectively, while the sample rate is as high as 1.3 Gbps.
Ocular Dominance Column Development: Analysis and Simulation (1989)

The visual cortex of many adult mammals has patches of cells that receive inputs driven by the right eye alternating with patches that receive inputs driven by the left eye. These ocular dominance patches (or "columns") form during early life as a consequence of competition between the activity patterns of the two eyes. A mathematical model of several biological mechanisms that can account for this development is presented. Analysis of this model reveals the conditions under which ocular dominance segregation will occur and determines the resulting patch width. Simulations of the model also exhibit other phenomena associated with early visual development, such as topographic refinement of cortical receptive fields, the confinement of input cell connections to patches, monocular deprivation plasticity including a critical period, and the effect of artificially induced strabismus. The model can be used to predict the results of proposed experiments and to discriminate among various mechanisms of plasticity.
GREEN SYNTHESIS OF TITANIUM DIOXIDE NANOPARTICLES BY NYCTANTHES ARBOR-TRISTIS LEAVES EXTRACT (2011)

Biological synthesis of nanoparticles by plant extract is at present under exploitation for the reason that to develop environmentally benign nanoparticles synthesis to avoid adverse effects in biomedical applications. Many plant extracts employed are neem, lemon grass, aloe vera, Indian gooseberry which focuses on the green chemistry principles. In this report we have developed a facile and eco-friendly method for the synthesis of titanium dioxide nanoparticles from titanium isopropoxide solution using nyctanthes leaves extract. The synthesized nanoparticles were characterized using x-ray diffraction (XRD), scanning electron microscopy (SEM) and particle size analyzer (PSA). The sharp peaks by XRD pattern show the crystallinity and purity of titanium dioxide nanoparticles. The shape and morphology was studied by SEM analysis. SEM and PSA analysis shows the nanoparticle size in the range from 100 to 150nm. This report added the value for the application of nanoparticles in biomedical and nanotechnology applications with the absence of adverse side effects.