Segmented Band Mechanism for Itinerant Ferromagnetism

We introduce a novel mechanism for itinerant ferromagnetism, which is based on a simple two-band model, and using numerical and analytical methods, we show that the Periodic Anderson Model (PAM) contains this mechanism. We propose that the mechanism, which does not assume an intra-atomic Hund's coupling, is present in both the iron group and some $f$ electron compounds

New nanomaterial and process for the production of biofuel from metal hyper accumulator water hyacinth

Three different studies were performed for the conversion of water hyacinth (Eichhornia crassipes) plant into biofuel. In the first study, water hyacinth was saccharified with diluted sulfuric acid (1% v/v at 110°C for one hour), fermented by yeast (Saccharomyces cerevisiae). The results showed the formation of 55.20% ethanol and 41.66% acetic acid. In another experiment, water hyacinth was gasified by using Ni and Co nano catalysts at 50 - 400°C and atmospheric pressure. In catalytic gasification, CH4 (2.41 - 6.67%), C2H4 (19.74 - 45.52%), C3H4 (21.04 - 45.52%), CH3OH (1.43 - 24.67%), and C3H8 / CH3CHO (0.33 -26.09%) products were obtained. In this study, anatase form of titanium dioxide photocatalyst was used. The reaction was performed at room temperature which gives methane, methanol and ethanol.This study also reports an interesting finding that metal contaminated water hyacinth could be used for not only the production of biofuel but also hydrocarbons

Phytoremediation technologies for Ni++ by water hyacinth

Phytoremediation of metal contaminated soil and water by Eichhornia crassipes (water hyacinth) is promising. The study was conducted to compare the phytoremoval of Ni++ from soil and wastewater. For the measurement of phytoremoval from soil, E. crassipes was used in a pot experiment. Results showed the removal of (Ni) 24.23 μg/g dry weight of plant and large level calculations show removal of 3449.76 kg/ha of soil, corresponding to 25 μg/g of the added Ni++. In the second experiment, Ni++ contaminated Hoagland’s solution was used for the hydroponic growth of water hyacinth. The result of hydroponic experiment showed the phytoremoval of Ni++ from Ni++ contaminated wastewater; maximum removal was 1.954 μg/g of dry weight. In third experiment, ash of water hyacinth was used for the adsorption and desorption of Ni++. The adsorption capacity was 1.978 μg/g of ash. For the extraction(desorption) of Ni++, 3 M HNO3 was used. Desorption capacity was 3.71 μg/g of ash. The results of comparative study show order of nickel phytoremediation from soil to be greater than that from water by adsorption which was greater than that from water by hydroponic study. For phytoremoval of Ni++ from soil and water, water hyacinth plant and its ash showed excellence. The desorbed Ni++ can be used in the industries e.g. in Ni plating.Keywords: Nickel, phytoremediation, soil, waste water, water hyacinth, biosorptio

Pengaruh Budaya Organisasi Terhadap Kualitas Pelayanan Di Dinas Tenaga Kerja Dan Transmigrasi Kabupaten Gowa

This study purposed to find out the influence of organizational culture on service quality at the Manpower and Transmigration Office of Gowa Regency. This study used the method.  Data collection techniques used a questionnaire in the form of a checklist and documentation. The data were analyzed by using descriptive statistics with a simple linear regression formula. The data was explained in the form of tables, frequency and narrative of the processed data with SPSS. The results showed that the influence of organizational culture on service quality at the Manpower and Transmigration Office of Gowa Regency was very significant, namely the effect of self-awareness (X1) on service quality (Y) of 0.102 or 10.2%, the effect of aggressiveness (X2) on quality. service (Y) was 0.069 or 6.9%, the influence of personality (X3) on service quality (Y) was 0.027 or 27%, the effect of performance (X4) on service quality (Y) was 0.290 or 29%, and the influence of team orientation (X5) on service quality (Y) of 0.243 or 24.3% which indicated that organizational culture affects service quality and also influenced by other variables that had not been examined in this study. Therefore, the hypothesis in the study was accepted because it was supported by a significance value.Keywords: Influence, Organizational Culture, Public Servic

Penerapan Pendekatan Saintifik Untuk Meningkatkan Prestasi Belajar Pada Mata Pelajaran Pendidikan Agama Islam Dan Budi Pekerti Peserta Didik

Penelitian ini bertujuan untuk mengkaji tentang peningkatan prestasi belajar  peserta didik pada mata pelajaran Pendidikan Agama Islam dan Budi Pekerti dengan menggunakan pendekatan saintifik. Penelitian ini merupakan penelitian Tindakan kelas dengan dua siklus pada 32 siswa kelas VIII A SMP Negeri 11 Makassar, terdiri dari 18 siswa laki-laki dan 14 siswa perempuan yang menggunakan metode pengumpulan data berupa observasi, wawancara, tes, dokumentasi, melalui pendekatan saintifik. Teknik analisis data penelitian ini digunakan rumus menghitung nilai rata-rata dan persentase data lembar kegiatan siswa dan data peningkatan prestasi belajar siswa kelas VIII A SMP Negeri 11 Makassar. Hasil Skor rata-rata siswa pada tes pra-siklus yang diberikan oleh peneliti kepada mereka adalah 59, dengan tingkat ketuntasan 12%; Dengan persentase 59%, rata-rata nilai siswa pada Siklus I adalah 75; Selain itu, pada siklus II persentase siswa dengan nilai rata-rata 92 meningkat. Kesimpulan yang dapat ditarik dari temuan tersebut adalah prestasi belajar siswa pada mata pelajaran pendidikan agama Islam dan akhlak mengalami peningkatan terhadap penerapan metodologi keilmuan

Observation of the Baryonic Flavor-Changing Neutral Current Decay Lambda_b -> Lambda mu+ mu-

We report the first observation of the baryonic flavor-changing neutral current decay Lambda_b -> Lambda mu+ mu- with 24 signal events and a statistical significance of 5.8 Gaussian standard deviations. This measurement uses ppbar collisions data sample corresponding to 6.8fb-1 at sqrt{s}=1.96TeV collected by the CDF II detector at the Tevatron collider. The total and differential branching ratios for Lambda_b -> Lambda mu+ mu- are measured. We find B(Lambda_b -> Lambda mu+ mu-) = [1.73+-0.42(stat)+-0.55(syst)] x 10^{-6}. We also report the first measurement of the differential branching ratio of B_s -> phi mu+ mu- using 49 signal events. In addition, we report branching ratios for B+ -> K+ mu+ mu-, B0 -> K0 mu+ mu-, and B -> K*(892) mu+ mu- decays.Comment: 8 pages, 2 figures, 4 tables. Submitted to Phys. Rev. Let

Measurement of CP-violation asymmetries in D0 to Ks pi+ pi-

We report a measurement of time-integrated CP-violation asymmetries in the resonant substructure of the three-body decay D0 to Ks pi+ pi- using CDF II data corresponding to 6.0 invfb of integrated luminosity from Tevatron ppbar collisions at sqrt(s) = 1.96 TeV. The charm mesons used in this analysis come from D*+(2010) to D0 pi+ and D*-(2010) to D0bar pi-, where the production flavor of the charm meson is determined by the charge of the accompanying pion. We apply a Dalitz-amplitude analysis for the description of the dynamic decay structure and use two complementary approaches, namely a full Dalitz-plot fit employing the isobar model for the contributing resonances and a model-independent bin-by-bin comparison of the D0 and D0bar Dalitz plots. We find no CP-violation effects and measure an asymmetry of ACP = (-0.05 +- 0.57 (stat) +- 0.54 (syst))% for the overall integrated CP-violation asymmetry, consistent with the standard model prediction.Comment: 15 page

Luminescence spectra of germanosilicate optical fibres I - radioluminescence and cathodoluminescence

Data are reported on the luminescence spectra generated by X-ray and electron irradiation of optical fibres, fibre preforms and silica. The impurities and imperfections in the fibre core have a higher luminescence efficiency than those in the substrate material. The core luminescence provides a major fraction of the total light emission, despite the fact that the core is a small fraction of the total fibre volume. A wide variety of overlapping emission bands are reported. The spectra are strongly temperature dependent but the component emission bands can generally be linked to either Ge impurities, giving the 400 nm band, exciton emission near 460 nm or other blue/UV bands linked to E'-type defects. Overall, the study of the fibre luminescence provides a sensitive technique for analysis d changes and repeatability of fibre fabrication

Measurements of branching fraction ratios and CP-asymmetries in suppressed B^- -> D(-> K^+ pi^-)K^- and B^- -> D(-> K^+ pi^-)pi^- decays

We report the first reconstruction in hadron collisions of the suppressed decays B^- -> D(-> K^+ pi^-)K^- and B^- -> D(-> K^+ pi^-)pi^-, sensitive to the CKM phase gamma, using data from 7 fb^-1 of integrated luminosity collected by the CDF II detector at the Tevatron collider. We reconstruct a signal for the B^- -> D(-> K^+ pi^-)K^- suppressed mode with a significance of 3.2 standard deviations, and measure the ratios of the suppressed to favored branching fractions R(K) = [22.0 \pm 8.6(stat)\pm 2.6(syst)]\times 10^-3, R^+(K) = [42.6\pm 13.7(stat)\pm 2.8(syst)]\times 10^-3, R^-(K)= [3.8\pm 10.3(stat)\pm 2.7(syst]\times 10^-3, as well as the direct CP-violating asymmetry A(K) = -0.82\pm 0.44(stat)\pm 0.09(syst) of this mode. Corresponding quantities for B^- -> D(-> K^+ pi^-)pi^- decay are also reported.Comment: 8 pages, 1 figure, accepted by Phys.Rev.D Rapid Communications for Publicatio