900 research outputs found

    Pengaruh Volume Perdagangan, EPS Dan PER Terhadap Harga Saham Sektor Pertambangan Pada Periode 2000-2005 Di Bursa Efek Jakarta

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    Penelitian ini bertujuan untuk mengetahui pengaruh volume perdagangan, EPS dan PER terhadap harga saham sektor pertambangan pada periode 2000-2005 di Bursa Efek Jakarta.Sampel saham yang digunakan berasal dari sektor pertambangan. Pengambilan sampel dilakukan dengan menetapkan kriteria tertentu (purposive sampling method) bahwa secara konsisten saham yang dipilih selalu masuk pada pemilihan saham penyusun indeks LQ45. Berdasarkan kriteria tersebut diperoleh tiga saham, yaitu saham PT Aneka Tambang, Tbk (ANTM), saham PT Medco Energi Internasional, Tbk. (MEDC), dan saham PT Timah, Tbk. (TINS).Penelitian ini dilakukan dengan menggunakan model regresi berganda data pooling. Hasil penelitian menunjukkan volume perdagangan berpengaruh positif secara signifikan terhadap harga saham. Laba per lembar saham (EPS) dan rasio harga terhadap laba (PER) menunjukkan pengaruh positif dan signifikan terhadap harga saham. Secara simultan, ketiganya berpengaruh secara signifikan terhadap harga saham

    Non-local order in gapless systems: Entanglement Spectrum in Spin Chains

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    We show that the entanglement spectrum can be used to define non-local order in gapless spin systems. We find a gap that fully separates a series of generic, high `entanglement energy' levels, from a flat band of levels with specific multiplicities that uniquely define the ground-state, and remains finite in the thermodynamic limit. We pick the appropriate set of quantum numbers, and then partition the system in this space. This partition corresponds to a very non-local real-space cut. Despite the fact that the Laughlin state is bulk gapped while the antiferromagnetic spin chain state is bulk gapless, we show that the S=1/2 Heisenberg antiferromagnet in one dimension has an entanglement spectrum almost identical to that of the Laughlin Fractional Quantum Hall state in two dimensions, revealing the similar field theory of their low-energy edge and bulk excitations respectively.Comment: 4.5 pages, 3 figures; submitted to PRL on 10/08/09; revised version plus supplementary materia

    Entanglement analysis of isotropic spin-1 chains

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    We investigate entanglement spectra of the SO(3) bilinear-biquadratic spin-1 chain, a model with phases exhibiting spontaneous symmetry breaking (both translation and spin rotation), points of enlarged symmetry, and a symmetry-protected topological phase (the Haldane phase). Our analysis reveals how these hallmark features are manifested in the entanglement spectra, and highlights the versatility of entanglement spectra as a tool to study one-dimensional quantum systems via small finite size realisations.Comment: 21 pages, 13 figure

    Phase Diagram and Quantum Order by Disorder in the Kitaev K1K_1-K2K_2 Honeycomb Magnet

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    We show that the topological Kitaev spin liquid on the honeycomb lattice is extremely fragile against the second-neighbor Kitaev coupling K2K_2, which has recently been shown to be the dominant perturbation away from the nearest-neighbor model in iridate Na2_2IrO3_3, and may also play a role in α\alpha-RuCl3_3 and Li2_2IrO3_3. This coupling naturally explains the zigzag ordering (without introducing unrealistically large longer-range Heisenberg exchange terms) and the special entanglement between real and spin space observed recently in Na2_2IrO3_3. Moreover, the minimal K1K_1-K2K_2 model that we present here holds the unique property that the classical and quantum phase diagrams and their respective order-by-disorder mechanisms are qualitatively different due to the fundamentally different symmetries of the classical and quantum counterparts.Comment: Published version (9+13 pages

    Robustness of s-wave Pairing in Electron-Overdoped A1−yFe2−xSe2\text{A}_{1-y}\text{Fe}_{2-x}\text{Se}_2

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    Using self consistent mean field and functional renormalization group approaches we show that s-wave pairing symmetry is robust in the heavily electron-doped iron chalcogenides (K, Cs)Fe2−xSe2(\text{K, Cs}) \text{Fe}_{2-x}\text{Se}_2 . This is because in these materials the leading antiferromagnetic (AFM) exchange coupling is between next-nearest-neighbor (NNN) sites while the nearest neighbor (NN) magnetic exchange coupling is ferromagnetic (FM). This is different from the iron pnictides, where the NN magnetic exchange coupling is AFM and leads to strong competition between s-wave and d-wave pairing in the electron overdoped region. Our finding of a robust s-wave pairing in (K, Cs)Fe2−xSe2(\text{K, Cs}) \text{Fe}_{2-x}\text{Se}_2 differs from the d-wave pairing result obtained by other theories where non-local bare interaction terms and the NNN J2J_2 term are underestimated. Detecting the pairing symmetry in (K, Cs)Fe2−xSe2(\text{K, Cs}) \text{Fe}_{2-x}\text{Se}_2 may hence provide important insights regarding the mechanism of superconducting pairing in iron based superconductors.Comment: 10 pages, 16 figure

    Analisis Tingkat Pengangguran Di Jawa Tengah Tahun 1997-2010

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    The unemployment rate in Central Java have fluctuated from year to year from 1997 to 2010. The unemployment rate is highest in 2007, reaching 7.70%. While the unemployment rate is the lowest in 2001, amounting to 3.70%. This study aims to analyze the relationship between population, inflation, average - minimum wage districts / cities, and the GDP growth rate with the unemployment rate. The test results showed a correlation coefficient of independent variables that have a positive and significant relationship with the dependent variable is the number of inhabitants and the minimum wage regencies / municipalities in Central Java. Variable numbers of the population has correlation coefficient of 0.755 while the minimum wage variable districts / cities have numbers correlation coefficient of 0.878 so it can be concluded that the higher the population, the greater the minimum wage and district / city positively and significantly associated with the level of unemployment in Central Java. Variable rate of inflation has correlation coefficient of -0.173 points while the variable rate of GDP growth has a correlation coefficient of -0.179 so it can be concluded that the variable inflation rate and GDP growth rate variable has a negative and significant relationship with the level of unemployment in Central Java. Correlation coefficient of inflation rate and GDP growth rate indicated by the negative sign means the rate of inflation and GDP growth rate has no significant relationship with unemployment

    KOORDINASI ANTAR SATUAN KERJA PERANGKAT DAERAH DALAM PENGELOLAAN EKOWISATA DI KABUPATEN MINAHASA TENGGARA

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    Tujuan dalam penelitian ini adalah untuk mengetahui koordinasi antar satuan kerja perangkat daerah dalam pengelolaan ekowisata di Kabupaten Minahasa Tenggara. Ekowisata (ecotourism) mengalami perkembangan dari waktu ke waktu, pada hakekatnva ekowisata adalah suatu bentuk wisata yang bertanggungjawab terhadap kelestarian area yang masih alami (natural area), memberi manfaat secara ekonomi dan mempertahankan keutuhan budaya bagi masyarakat setempat. Atas dasar ini, bentuk ekowisata merupakan bentuk gerakan konservasi. Koordinasi antar satuan kerja yang terkait sangat dibutuhkan dalam rangka pengembangan sector pariwisata di sebuah daerah termasuk pada kabupaten Minahasa Tenggara. Potensi yang dimiliki daerah tersebut sangat menjanjikan apabila dikelola dengan baik oleh pemerintah setempat melalui dinas atau instansi terkait. Penelitian ini menggunakan metode penelitian kualitatif. Fokus penelitian ini adalah koordinasi SKPD, yang dikaji dari teori koordinasi berdasarkan konsep yang dikemukakan menurut Sutarto (2006:152-153). Hasil penelitian menunjukkan Koordinasi lintas sektor dalam mengembangkan ekowisata di Kabupaten Minahasa Tenggara ini pada kenyataannya memang menghadapi beberapa kendala, sehingga membuat kepariwisataan di Kabupaten Minahasa Tenggara saat ini berjalan dengan apa adanya bahkan cenderung monoton tanpa ada sentuhan yang berarti meskipun terpenuhinya pencapaian beberapa target.  Kata Kunci: Koordinasi, SKPD, Ekowisat

    Analisis Penerapan Kurikulum 2013 pada Mata Pelajaran IPS dengan Tema Keberagaman Suku Bangsa di SD Negeri 091578 Dolok Sinumbah

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    Penelitian ini bertujuan untuk Analisis Penerapan Kurikulum 2013 Pada Mata Pelajaran IPS Dengan Tema Keberagaman Suku Bangsa Di SD Negeri 091578 Dolok Sinumbah. Jenis penelitian ini adalah penelitian deskriftif kualitatif. Instrument yang digunakan dalam penelitian ini adalah wawancara yang membahas tentang implementasi kurikulum 2013. Teknik analisis data yang digunakan adalah reduksi data, penyajian data dan kemudian penarikan kesimpulan/verifikasi. Hasil penelitian menunjukkan bahwa: Dalam hal-hal tertentu guru tidak memberikan pelaksanaan pembelajaran yang sesuai, seperti dalam melakukan kegiatan pendahuluan, guru tidak memberikan motivasi belajar kepada peserta didik. Pada tahap inti, guru tidak memanfaatkan media pembelajaran dan hanya menggunakan bahan ajar. Kemudian  pada tahap kegiatan penutup, guru tidak memberikan kesimpulan pembelajaran dan informasi rencana pembelajaran pada pertemuan selanjutnya
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