100,927 research outputs found
IMPLEMENTASI MODEL ATIK TERHADAP KEMAMPUAN LITERASI MATEMATIKA PADA MATERI PECAHAN KELAS V SD
No full textThis study aims to determine whether or not there is a difference in students' mathematical literacy skills before and after the ATIK Model (Observe, Imitate, Do) is applied to fractional material for grade V; Improvement in students' mathematical literacy skills after the ATIK model is applied; and the Implementation of the ATIK model on mathematical literacy skills. The type of research used is quantitative Pre-experimental research in the form of one group pretest posttest. This research was conducted at SDN 06 Semparuk. The research population was all fifth grade students of SDN 06 Semparuk with a sampling technique in the form of saturated sampling technique totaling 18 students. The data collection technique used test and non-test measurement techniques. The data analysis technique is quantitative data analysis and statistics. The results of the study can be concluded that: (1) There is a difference in students' mathematical literacy skills before and after the ATIK model is applied between the pretest class and the posttest class that were given treatment, namely using t-test analysis with a P value calculation of 0.01 <0.05.; (2) There is an increase in students' mathematical literacy skills in the application of the ATIK model. The application of the ATIK model in learning fractional material can be carried out well.; (3) The implementation of the ATIK model on students' mathematical literacy skills was an average of 84% with a very good category
Letter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
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
Pelevin’s Trinity in the novel “t”: author – protagonist – reader
No full textThe article attempts to interpret Pelevin's artistic strategy in the novel "T" by exploring its subject organization and addressing the key problems of the author, the protagonist, and the reader as they are seen by the researcher. The article analyzes the peculiarities of constructing the narrative reality in the novel "T", and goes on to discuss Pelevin's philosophic models of the development of the humankind, and the emergence of his new anthropology
Protonated dipeptide losses from b 5 and b 4 ions of side chain hydroxyl group containing pentapeptides
No full textIn this study, C-terminal protonated dipeptide eliminations were reported for both b 5 and b 4 ions of side chain hydroxyl group (-OH) containing pentapeptides. The study utilized the model C-terminal amidated pentapeptides having sequences of XGGFL and AXVYI, where X represents serine (S), threonine (T), glutamic acid (E), aspartic acid (D), or tyrosine (Y) residue. Upon low-energy collision-induced dissociation (CID) of XGGFL (where X = S, T, E, D, and Y) model peptide series, the ions at m/z 279 and 223 were observed as common fragments in all b 5 and b 4 ion (except b 4 ion of YGGFL) mass spectra, respectively. By contrast, peptides, namely SMeGGFL-NH2 and EOMeGGFL- NH2, did not show either the ion at m/z 279 or the ion at m/z 223. It is shown that the side chain hydroxyl group is required for the possible mechanism to take place that furnishes the protonated dipeptide loss from b 5 and b 4 ions. In addition, the ions at m/z 295 and 281 were detected as common fragments in all b 5 and b 4 ion (except b 4 ion of AYVYI) mass spectra, respectively, for AXVYI model peptide series. The MS4 experiments exhibited that the fragment ions at m/z 279, 223, 295, and 281 entirely reflect the same fragmentation behavior of [M + H]+ ion generated from commercial dipeptides FL-OH, GF-OH, YI-OH, and VY-OH. These novel eliminations reported here for b 5 and b 4 ions can be useful in assigning the correct and reliable peptide sequences for high-throughput proteomic studies. [Figure not available: see fulltext.]Scientific and Technological Research Council of Turkey (109T430); State Planning Organization (Turkey
Measuring industry-science links through inventor-author relations: A profiling method
No full textIn this pilot study we examine the performance of text-based profiling in recovering a set of validated inventor-author links. In a first step we match patents and publications solely based on their similarity in content. Next, we compare inventor and author names on the highest ranked matches for the occurrence of name matches. Finally, we compare these candidate matches with the names listed in a validated set of inventor-author names. Our text-based profile methodology performs significantly better than a random matching of patents and publications, suggesting that text-based profiling is a valuable complementary tool to the name searches used in previous studies.innovation; industry-science links; text-based profiling;
Wave turbulence of a rotating array of quantized vortices in the T → 0 temperature limit
No full textThe dynamics of quantized vortices in the zero temperature limit is currently of great interest, particularly in the case of the Fermi superfluid He-B. Here we study wave turbulence, generated by the librating motion of a rotating cylindrical container filled with He-B, in the limit of vanishing viscous forces at temperatures . The polarization of the quantized vortices with respect to the axis of rotation is measured using non-invasive NMR techniques. We observe a decrease of the polarization when the librating motion is started, and a two-stage relaxation process when the modulation of the rotation velocity is stopped. The first relaxation process is associated with the dissipation of large-scale flow stored in inertial waves and the solid body rotation of the vortex array. From the decay of these energy reservoirs we determine the rate of energy dissipation of large-scale flow. The later second process is related to the relaxation of Kelvin waves on individual vortices. This process is monitored by the recovery of the polarization. The existence of a Kelvin wave cascade at the lowest temperatures is currently a central open question. We supply some evidence for the cascade
Lithogeochemistry and geothermobarometry of mineralized cordierite- orthoamphibole and related rocks at Atik Lake, Manitoba, Némiscau and Montauban, Québec
No full textCordierite-orthoamphibole rocks associated with contrasting polymetallic mineralization occur in a wide range of metamorphic conditions in the Atik Lake, Manitoba, and Nemiscau and Montauban, Quebec, metamorphic terranes.Lithogeochemistry and geothermobarometry investigations using whole rock major, trace and rare earth elements and mineral chemistries have established the chemical and physical changes that occurred during hydrothermal alteration and subsequent regional metamorphism. The Log(Ratio) method, utilizing ratio profiles of the immobile elements , TiO, Zr, Nb, Y V and Cr, was designed to identify the protoliths of the metamorphosed altered rocks.Detailed geothermobarometry and textural evidence indicate that cordierite-orthoamphibole rocks in the three terranes formed at peak P-T conditions of kbar and C at Atik Lake (andalusite zone), kbar C at Nemiscau (sillimanite zone), and kbar and C at Montauban (kyanite-sillimanite zone). Cordierite-orthoamphibole rocks in the terranes exhibit a range of bulk chemical compositions with the most Fe-rich occurring in the Atik Lake belt, and the most Mg-rich in the Montauban mine sequence. Mineral assemblages in these rocks were in equilibrium with contrasting sulfide-oxide arsenide fO-fS buffers: pyrrhotite-ilmenite arsenopyrite lollingite at Atik Lake, pyrrhotite-pyrite-magnetite at Nemiscau, and pyrrhotite-rutile-sphalerite at Montauban.The partitioning of Fe-Mg between cordierite and anthophyllite was studied for use as a geobarometer. The partitioning coefficient () is slightly temperature dependant and strongly pressure dependent. This new geobarometer was empirically calibrated using mineral chemistry from the three terranes and from the literature.High of the metamorphic fluid is required so that the X values of the anthophyllite will be in equilibrium under peak P-T conditions with the appropriate sulfide-oxide arsenide assemblage. Metamorphic dehydration of chlorite-rich hydrothermally altered rocks in the three terranes is compatible with the generation of such water-rich fluids during the crystallization of the cordierite-orthoamphibole rocks
- …
