104,075 research outputs found
Astrophysical Parameters of the Open Cluster Berkeley 6
No full textIn this study, the structural and basic astrophysical parameters of the
poorly studied open cluster Berkeley 6 are calculated. Analyses of the cluster
are carried out using the third photometric, spectroscopic, and astrometric
data release of Gaia (Gaia DR3). The membership probabilities of stars located
in the direction of the cluster region are calculated by considering their
astrometric data. Thus, we identified 119 physical members for Berkeley 6. The
colour excess, distance, and age of the cluster are determined simultaneously
on the colour-magnitude diagram. We fitted solar metallicity PARSEC isochrones
to the colour-magnitude diagram by considering the most probable member stars
and obtained colour excess as 0.9180.145 mag.
The distance and age of the cluster are determined as pc and
Myr, respectively.Comment: 7 pages, 6 figures and 3 tables, accepted for publication in Bitlis
Eren University Journal of Scienc
Fuzzy rule interpolation for multidimensional input spaces in determining d50c of hydrocyclones
No full textFuzzy rule-based systems have been very popular in many engineering applications. In mineral engineering, fuzzy rules are normally constructed using some fuzzy rule extraction techniques to establish the determination model in predicting the d50c of hydrocyclones. However, when generating fuzzy rules from the available information, it may result in a sparse fuzzy rule base. The use of more than one input variable is also common in hydrocyclone data analysis. This paper examines the application of fuzzy interpolation to resolve the problems using sparse fuzzy rule bases, and to perform analysis of fuzzy interpolation in multidimensional input spaces
Artificial neural networks in estimation of hydrocyclone parameter d50c with unusual input variables
No full textThe accuracy in the estimation of hydrocyclone parameter, d50c, can substantially be improved by application of artificial neural networks (ANN). With ANN, many nonconventional operational variables such as water and solid split ratios, overflow and underflow densities, apex and spigot flowrates can easily be incorporated as the input parameters in the prediction of d50c. The ANN yields high correlation of data, hence it can be used in automatic control and multiphase operations of hydrocyclones
Letter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
Data for: Synthesis of 1,4-diazabicyclo[2.2.2]octane and pyridinium based cationic polymers via ROMP and examination of their antibacterial activity and cytotoxicity
No full textThis paper focuses on the synthesis of cationic antibacterial polymers that could be a potential for new generation antibiotics with well-defined architecture derived by Ring Opening Metathesis Polymerization (ROMP) technique. Mono and double charge bearing quaternary groups have been used to synthesize cationic homopolymers (MWs: 3000 and 10000 g/mole) and their copolymers (MWs: 5000 g/mole). Hemolytic concentration (HC50, ≥1000 µg/mL) and MTS assay results showed that the polymers are non-toxic. It has been observed the double charge bearing polymers has the highest antimicrobial activity (S. aureus= 8 µg/mL) and a high selectivity with a value of 250 against S. aureus. Percent killing efficiencies were tested on glass surface and moderate killing efficiency was observed between a ranges 40-80% in 5 minutes. Cationic charge density and zeta potential studies were used to investigate mechanism of antimicrobial efficiency of the polymer in solution during the action against S. aureus to understand structure-activity relationship
Response in vitro of lignin degrading fungi to single or combined applications of a biochar and a compost humic acid
No full textThe fungi Stereum hirsutum, Irpex lacteus, Phanerochaete chrysosporium, Bjerkandera adusta, Trametes versicolor and Pleurotus ostreatus were treated in vitro with a biochar (BC) from red spruce wood at doses of 0.2% (w/v, BCLD) and 1% (BCHD), the BC water extract (BCWE) at doses of 0.2% (w/v, BCWELD) and 1% (BCWEHD), a compost humic acid (HA) at a concentration of 200 mg L-1and combinations BCWE-HA. All BC treatments stimulated P. ostreatus growth (up to 26%). T. versicolor growth was increased (up to 10%) and reduced (down to 33%) by BCLDand BCHD, respectively. All the other fungi were always inhibited by BC (down to 59% for B. adusta with BCHD). BCWELDincreased hyphal elongation of B. adusta and T. versicolor up to 22% and 12%, respectively, whereas BCWEHDslightly reduced that of B. adusta. In general, both HA alone and all combinations BCWE-HA at both doses significantly stimulated mycelial growth of B. adusta, T. versicolor and P. ostreatus (up to 22% for B. adusta) or were irrelevant. These findings indicate that when BC is incorporated in soil, BC activity in vitro on ligninolytic fungi might be considerably modified by the contents of water and humic substances present in soil
Handwritten biographical information on Paulina T. McClung Merritt
No full textA handwritten biography of Paulina T. McClung Merritt by an unknown author, 1892.
Heterogeneous and tissue-specific regulation of effector T cell responses by IFN-gamma during Plasmodium berghei ANKA infection.
No full textIFN-γ and T cells are both required for the development of experimental cerebral malaria during Plasmodium berghei ANKA infection. Surprisingly, however, the role of IFN-γ in shaping the effector CD4(+) and CD8(+) T cell response during this infection has not been examined in detail. To address this, we have compared the effector T cell responses in wild-type and IFN-γ(-/-) mice during P. berghei ANKA infection. The expansion of splenic CD4(+) and CD8(+) T cells during P. berghei ANKA infection was unaffected by the absence of IFN-γ, but the contraction phase of the T cell response was significantly attenuated. Splenic T cell activation and effector function were essentially normal in IFN-γ(-/-) mice; however, the migration to, and accumulation of, effector CD4(+) and CD8(+) T cells in the lung, liver, and brain was altered in IFN-γ(-/-) mice. Interestingly, activation and accumulation of T cells in various nonlymphoid organs was differently affected by lack of IFN-γ, suggesting that IFN-γ influences T cell effector function to varying levels in different anatomical locations. Importantly, control of splenic T cell numbers during P. berghei ANKA infection depended on active IFN-γ-dependent environmental signals--leading to T cell apoptosis--rather than upon intrinsic alterations in T cell programming. To our knowledge, this is the first study to fully investigate the role of IFN-γ in modulating T cell function during P. berghei ANKA infection and reveals that IFN-γ is required for efficient contraction of the pool of activated T cells
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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