gebhart/patrepeval huggingface dataset:
Evidence of molecular aggregation of asphaltenes by using induced laser fluorescence technique (2003)

Fluorescence spectroscopy provides a powerful method in studies investigates complex molecules. In this work we present some fluorescence studies about molecular aggregation of asphaltenes in toluene and tethahidrofuran (thf) solution were carried out. The fluorescence was induced by a CW Ar<sup>+</sup> laser (&lambda;<sub>exc</sub> = 514.5 nm). At low concentration (&lt; 500 mgL<sup>-1</sup>) no red shift was observed in fluorescence spectra, but the dependence of the fluorescence intensity with the solution concentration have a linear increase below 50 mgL<sup>-1</sup>, then, for higher samples concentration a dramatical dismished as the concentration increased is observed, which can attributed to the asphaltene aggregation.
DetLock: Portable and Efficient Deterministic Execution for Shared Memory Multicore Systems (2012)

Multicore systems are not only hard to program but also hard to test, debug and maintain. This is because the traditional way of accessing shared memory in multithreaded applications is to use lock-based synchronization, which is inherently non-deterministic and can cause a multithreaded application to have many different possible execution paths for the same input. This problem can be avoided however by forcing a multithreaded application to have the same lock acquisition order for the same input. In this paper, we present DetLock, which is able to run multithreaded programs deterministically without relying on any hardware support or kernel modification. The logical clocks used for performing deterministic execution are inserted by the compiler. For 4 cores, the average overhead of these clocks on tested benchmarks is brought down from 20% to 8% by applying several optimizations. Moreover, the overall overhead, including deterministic execution, is comparable to state of the art systems such as Kendo, even surpassing it for some applications, while providing more portability.
Role of Cdk5 in Neuronal Signaling, Plasticity, and Drug Abuse (2003)

Functional and structural neuronal plasticity are mediated by a complex network of biochemical signal transduction pathways that control the strength of specific synapses and the formation of new synapses de novo. The neuronal protein kinase Cdk5 has been implicated as being involved in numerous aspects of both functional and structural plasticity through its regulation of signal transduction pathways. In this review the findings of a number of studies are summarized that have advanced our understanding of how Cdk5 may be involved in these processes. We focus on the modulation of protein phosphatase activity in both the hippocampus and basal ganglia, and review findings that indicate Cdk5 is likely to regulate neuronal plasticity in these brain regions. Studies showing involvement of Cdk5 in reward and motor-based plasticity, which are thought to underlie drug abuse, are discussed.
Implementation of WiFi/Bluetooth-based Smart Narrow Field Communication (2014)

In this poster, we introduce our developed wireless tag system called Smart Narrow Field Communication (SNFC). The purpose of SNFC is to provide a long url of the contents on the Internet easily like QR code and NFC (Near Field Communication). SNFC assumes a device name of wireless applications as a tag for recognizing a target content. The relationship between a device name and the url is managed on our cloud system. In addition to a device name, our system takes other user contexts such as gender and age into consideration for deciding the target content. The advantage of SNFC is that all the common devices such as WiFi router or Bluetooth mouse can be used as a tag.
Featured Organism: Schizosaccharomyces pombe, the fission yeast (2002)

Schizosaccharomyces pombe, the fission yeast, has long been a crucial model for the study of the eukaryote cell cycle. We take a look at this important yeast, whose genome has recently been completed, featuring comments from Valerie Wood, Jürg Bähler, Ramsay McFarlane, Susan Forsburg, Iain Hagan and Paul Nurse on the implications of having the complete sequence and future prospects for pombe genomics.
The Acylation of Ketones with Esters to Form β-Diketones by the Sodium Amide Method1 (1945)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Acylation of Ketones with Esters to Form β-Diketones by the Sodium Amide Method1Robert Levine, Joseph A. Conroy, Joe T. Adams, and Charles R. HauserCite this: J. Am. Chem. Soc. 1945, 67, 9, 1510–1512Publication Date (Print):September 1, 1945Publication History Published online1 May 2002Published inissue 1 September 1945https://pubs.acs.org/doi/10.1021/ja01225a034https://doi.org/10.1021/ja01225a034research-articleACS PublicationsRequest reuse permissionsArticle Views439Altmetric-Citations36LEARN 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
Detection and Speciation of Transuranium Elements in Synthetic Groundwater via Pulsed-Laser Excitation (1988)

High sensitivity methods for detection and speciation of complexed transuranium ions in synthetic basalt groundwater, and simplified analogs, are being developed which exploit advances in pulsed laser technology. The first demonstration of high sensitivity detection of a transuranium ion at temperatures significantly above ambient is reported using laser photoacoustic spectroscopy (LPAS). The existence of enhanced LPAS signal amplitudes with increasing temperature in aqueous solution is confirmed in LPAS spectra recorded at 30 C, 60 C and 90 C using micromolar concentrations of /sup 241/Am/sup 3+/. A detection sensitivity of 8.5 parts per trillion (weight basis) of /sup 244/Cm/sup 3+/ in a simplified basalt groundwater at 22 C has been achieved using laser-induced fluorescence spectroscopy (LIF). This corresponds to 1 x 10/sup 8/ Cm/sup 3+/ ions in the laser beam. The detailed spectroscopic information obtained by this method points to the existence of previously unobserved Cm/sup 3+/ species. A brief assessment of the applicability and sensitivity of LPAS and LIF methods for speciating transuranium ions in near-neutral pH aqueous solution, such as the groundwater expected in a basalt nuclear waste repository, is presented. 27 refs., 3 figs.
A search range prediction for fast stereo matching in 3-D video (2012)

In this paper, we generate the valid search range information for prediction of search range. We compare a previous frame with a current one for acquiring disparity levels of pick values and the sum of object pixel values in each frame. The result obtained from comparing two frames is used to estimate the search range for the next frame. Also, to reduce the processing time, we use sub-sampled images and reuse the search range to realize the real-time system. As a result of our experiment, the processing time of our proposed algorithm is reduced by about 70% compared with the one using the full search range, with achieving similar PSNR.
The two-dimensional iron(ii)–thiocyanate–4,4′-bipyridine coordination network (2010)

The crystal structures of eight solvates of {Fe(4,4′-bipyridine)2(NCS)2}n have been determined. All of them contain a layered iron–bipyridine–thiocyanate framework formed from approximately square infinite two-dimensional (4,4) iron–bipyridine grids, with the solvent molecules hosted between adjacent layers. All the structures contain the iron(II) centres in the high-spin electronic configuration, and magnetic susceptibility measurements on the toluene and nitrobenzene solvates do not reveal any spin-crossover behaviour.
Chloride transport by the cortical and outer medullary collecting duct (1987)

The processes by which chloride is transported by the cortical and outer medullary collecting tubule have been most extensively studied using in vitro microperfusion of rabbit tubules. Chloride appears to be transported by three major mechanisms. First, Cl can be actively reabsorbed by an electroneutral Cl-HCO3 exchanger localized to the apical membrane of the HCO3-secreting (beta-type) intercalated cell. Cl exits this cell via a basolateral Cl channel. This anion exchange process can also operate in a Cl self-exchange mode, is stimulated acutely by beta-adrenergic agonists and cAMP, and is regulated chronically by in vivo acid-base status. Second, Cl can diffuse passively down electrochemical gradients via the paracellular pathway. Although this pathway does not appear to be selectively permeable to Cl, it is large enough to allow for significant passive reabsorption. Third, Cl undergoes recycling across the basolateral membrane of the H+-secreting (alpha-type) intercalated cell. HCO3 exit from this cell brings Cl into the cell via electroneutral Cl-HCO3 exchange; Cl then exits the cell via a Cl channel. Cl transport is thus required for acidification and alkalinization of the urine. Both of these processes exist in the cortical collecting tubule. Their simultaneous operation allows fine tuning of acid-base excretion. In addition, these transport systems, when functioning at equal rates, effect apparent electrogenic net Cl absorption without changing net HCO3 transport. These systems may play an important role in regulating Cl balance.
Translating mouse models of abdominal aortic aneurysm to the translational needs of vascular surgery (2021)

New imaging techniques, experimental therapeutic alternatives, and endovascular treatment options provide a plethora of research topics to strengthen the individual features of currently available mouse models, creating the possibility of shedding new light on translational research questions.
Framing and the Malleability of Privacy Choices (2014)

Policy approaches for addressing emerging consumer privacy concerns increasingly rely on providing consumers with more information and control over the usage of their personal data. In three experiments, we evaluate the efficacy of such mechanisms in the face of subtle but common variation in the presentation of privacy choices to consumers. We find that consumers’ decision frames and thus, their propensity to select privacy protective alternatives can be subtly but powerfully influenced by commonplace heterogeneity in the presentation of privacy choices. Our results suggest that choice mechanisms alone may not reliably serve policy maker goals of protecting consumers’ privacy in the face of emerging data practices by firms. 1
Biological fluidized beds for water and wastewater treatment (1991)

This article describes the current technology available and the application of biological fluidized beds for water and wastewater treatment. Topics discussed are process and component design including selection of component materials and bed media, commercial application, application examples and new developments as well as a historical perspective.
Prostate‐specific antigen (PSA) and PSA velocity for prostate cancer detection in men aged <50 years (2007)

In men aged <50 years the operating characteristics of PSA are more sensitive and specific than in older men. Diagnostic PSA levels in men aged <50 years are significantly lower than suggested by guidelines. Using a 2.0-2.5 ng/mL PSA level threshold for biopsy in men aged <50 years and a PSAV threshold lower than the traditional 0.75 ng/mL/year is reasonable in contemporary practice. Further studies are warranted to validate these thresholds.
Los gastos y los ingresos plurianuales (1998)

En el presente Documento de Trabajo se estudian las partidas de balance que representan gastos e ingresos diferidos, que han sido contabilizados en cuentas patrimoniales en el momento en que tuvo lugar la transaccion economica que les dio origen por tener una proyeccion economica futura. Dichas partidas, de caracter plurianual, permaneceran en ei balance mientras no se imputen totalmente a ios resultados de los diversos ejercicios economicos a que correspondan, de acuerdo con ios principios contables. Se analizan los diferentes conceptos de gastos e ingresos plurianuales contemplados en la legislacion mercantil espanola, de manera preferente lo dispuesto en el Plan General de Contabilidad, y se hace referencia a otros planteamientos alternativos de organismos contables nacionales e internacionales.
Carbonate Ions and Arsenic Dissolution by Groundwater (2000)

Samples of Marshall Sandstone, a major source of groundwater with elevated arsenic levels in southeast Michigan, were exposed to bicarbonate ion under controlled chemical conditions. In particular, effects of pH and redox conditions on arsenic release were evaluated. The release of arsenic from the aquifer rock was strongly related to the bicarbonate concentration in the leaching solution. The results obtained suggest that the carbonation of arsenic sulfide minerals, including orpiment (As2S3) and realgar (As2S2), is an important process in leaching arsenic into groundwater under anaerobic conditions. The arseno−carbonate complexes formed, believed to be As(CO3)2-, As(CO3)(OH)2-, and AsCO3+, are stable in groundwater. The reaction of ferrous ion with the thioarsenite from carbonation process can result in the formation of arsenopyrite which is a common mineral in arsenic-rich aquifers.
Establishment and characterization of a new mantle cell lymphoma cell line with a NOTCH2 mutation, Arbo (2022)

Cell lines represent an essential tool used in preclinical research. Most hematologic malignancies have a wide array of cell lines representing their respective molecular and pathologic spectra. In mantle cell lymphoma (MCL), cell lines become specifically valuable in view of the heterogeneity of this disease. Unfortunately, the number of MCL cell lines that are available for the research community remains small, with only nine cell lines available for purchase through the American Type Culture Collection (ATCC). We have established a novel blastoid MCL cell line, isolated from the malignant pleural effusion of a 69-year-old male with refractory MCL. Arbo was fully characterized with cytogenetics, immunophenotyping, whole exome sequencing and drug sensitivity assays. One of the most notable mutations identified in Arbo (but not in normal tissue) was the missense mutation NOTCH2 R2400*, which has been proposed as a clinically significant mutation in MCL seen in 5% of cases. NOTCH2 R2400* results in a truncated Notch2 protein, leading to a more stable and active protein. Using pharmacologic inhibition of Notch2, we showed a dependence of Arbo on NOTCH2 signaling, as well as a link between CD23 expression on Arbo and NOTCH2 activity. Arbo represents a NOTCH2 mutated model that is useful in MCL as well as other lymphomas with such mutation. We plan to deposit Arbo at the ATCC to be available for the research community.
The complete Mokola virus genome sequence: structure of the RNA-dependent RNA polymerase. (1997)

The genome sequence of the rabies-related virus Mokola virus (genus Lyssavirus) has been completed by sequencing the L gene, which consists of 6384 nucleotides encoding a 2127 amino acid polymerase. Alignment of the Mokola virus L protein with other polymerases from the virus order Mononegavirales defined three domains: a divergent NH2-terminal domain, a highly conserved central domain carrying most of the functional motifs and a COOH-terminal domain with alternating conserved and divergent regions. A statistical study outlined the stringency of conservation of glycine, acidic (D, E) and basic (K, R, H) amino acids in polymerases, particularly as key residues of the conserved motifs.
Opportunities to enhance multimode fiber links by application of overfilled launch (2005)

This paper investigates possibilities for the practical design of high-performance multimode fibers (MMFs) that can provide bandwidths in excess of 10 GHz/spl middot/km in an overfilled regime of operation. Analysis of standard MMF in an overfilled launch demonstrates that the theoretical bandwidth limitations arise from the influence of cladding on the propagation of the highest order modes. Practical MMF profile designs that overcome this problem are investigated. The standard 50- and 62.5-/spl mu/m fiber profiles are redesigned first to allow for the performance in an overfilled launch with the differential mode delays (DMDs) below 0.055 and 0.250 ns/km, respectively. It is shown that such fibers can exhibit the same or better theoretical bandwidth in an overfilled launch when compared to standard fiber under restricted launch. Elimination of the need for the restricted mode launch in high-performance multimode transmission systems can improve reliability issues and can relax the range of tolerance requirements imposed on terminal equipment, optical components, and link installation. Furthermore, MMFs that can be operated in an overfilled launched are compatible with emerging vertical cavity surface emitting laser (VCSEL) wavelength division multiplexing (WDM) array technologies. A successfully controlled higher order mode DMD also allows for the reduction of MMF core size and /spl Delta/ that can be beneficial for low-cost high-performance single-channel links. It is demonstrated that properly designed reduced core fibers can achieve theoretical DMDs in the range of 0.005-0.02 ns/km. The bend loss properties of redesigned fibers are investigated in detail, showing that the proposed modifications do not lead to significant degradation of bend loss performance. Moreover, they can be manufactured at considerably lower cost while utilizing commercially readily available low-cost VCSELs. Even where the theoretical limit is not achieved by practical fiber making, the reduced core size and /spl Delta/ MMF can provide higher production yield, lower cost, and higher average bandwidth.
Cuttings Flow Meters Monitor Hole Cleaning in Extended Reach Wells (1998)

Abstract This paper presents an innovative solution to monitor hole cleaning in Extended Reach Wells. It was successfully used while developing marginal oil and gas reserves offshore TIERRA DEL FUEGO (ARGENTINA) by TOTAL AUSTRAL operator and partners DEMINEX and PAN AMERICAN ENERGY. Keeping the hole clean in Extended Reach Wells is a key issue as cuttings accumulation will result in increased torque, pressure losses and will create a high risk of getting a stuck pipe. Cuttings Flow Meters (CFM) continually measure and record the flow of cuttings at the outlet of the shale shakers. This measurement allows an enhanced understanding of hole cleaning process and status, which in turn permits to optimize the main drilling parameters such as flow rate, rotation, circulation times, reaming time at connections and rate of penetration. It has been observed on those wells that the volume of cutting returns always fits with the actual volume of hole, over extended periods of time. By comparing on a permanent basis the volume of hole drilled with the volume of cuttings returned to surface, one can monitor the cuttings accumulation in the hole, one can thus better diagnose an increase in hole friction, adjust mud rheology parameters and circulating rate in order to minimize the surface and bottom hole circulating pressures while ensuring a good transport, all factors which are essential to further extend the drilling envelope. P. 401
Metrological and Legal Traceability of Time Signals (2018)

Metrological traceability requires an unbroken chain of calibrations that relate to a reference, with each calibration having a documented measurement uncertainty. In the field of time and frequency metrology, the desired reference is usually Coordinated Universal Time (UTC), or one or more of its official realizations, termed UTC(k), and traceability to UTC is a legal requirement for many entities. Traceability to UTC can be established in three areas – frequency, time interval, and timeof-day synchronization, but this paper focuses solely on the traceability of time signals used for synchronization. We first examine the definition of traceability, then discuss how traceability can be established via the reception of time signals transmitted by satellites and network time servers, followed by a discussion of how these signals can meet the synchronization and traceability requirements of the financial and electric power industries. Not all of the available UTC time signals are considered in this paper, as we primarily focus on direct broadcast and common-view Global Positioning System (GPS) signals, with uncertainties measured in nanoseconds, and Network Time Protocol (NTP) signals, with uncertainties measured in microseconds and milliseconds.
A theory of term weighting based on exploratory data analysis (1998)

Techniques of exploratory data analysis are used to study the weight of evidence that the occurrence of a query term provides in support of the hypothesis that a document is relevant to an information need. In particular, the relationship between the document frequency and the weight of evidence is investigated.
The development and clinical evaluation of a standing biofeedback trainer. (1997)

A new standing biofeedback training device, which includes a height-adjustable work table, weight-bearing sensors, and a real-time visual and auditory feedback system, has been developed for postural training. Sixty persons with hemiplegia after acute stroke or traumatic brain injury were randomly divided into Group A (experimental) and Group B (control). After a training period of 4 weeks, the percentage of postural asymmetry in Group A and Group B was reduced from 17.2 +/- 10.8% and 17.0 +/- 10.0% to 3.5 +/- 2.2% and 10.1 +/- 6.4 percent, respectively (p = 0.003). There was no significant difference between subjects with right or left hemiplegia. The results indicated that this device had a positive training effect on stance symmetry in hemiplegic subjects.
File system encryption with integrated user management (2001)

Existing cryptographic file systems for Unix do not take into account that sensitive data must often be shared with other users, but still kept secret. By design, the only one who has access to the secret data is the person who encrypted it and therefore knows the encryption key or password. This paper presents a kernel driver for a new encrypted file system, called Fairly Secure File System (FSFS), which provides mechanisms for user management and access control for encrypted files. The driver has been specifically designed with multi user systems in mind. FSFS also tries to prevent unintentional transfer of sensitive data to unencrypted file systems, where it would be stored in plaintext.
Intramolecular base-accelerated radical-scavenging reaction of a planar catechin derivative bearing a lysine moiety (2009)

A planar catechin derivative incorporating a lysine moiety was synthesized and showed approximately 400-fold increased radical-scavenging activity relative to naturally-occurring (+)-catechin.