Pengaruh Ukuran Dewan Komisaris, Direksi, Komisaris Independen, Struktur Kepemilikan, dan Indeks Corporate Governance terhadap Asimetri Informasi

This study aimed to examine the effect of size board of commisioner, board of director, independent commisioner, ownership structure, and corporate governance index to asymmetric information listed in Indonesia Stock Exchange 2008-2012. In this study, there are six independent variables; size of board commissioner, proportion of independent commissioner, size of board director, institutional ownership, managerial ownership, Corporate Governance Perception Index, and one dependent variable is asymmetric information.The sampling mehod used in this research is purposive sampling method. Type of regression model used in this study is multple regressions. The total final sample used were 77 companies.The results of Statitical test show that (Test F) all independent variables affect asymmetric information collectively. The influential of independent variable Corporate Governance Perception Index and proportion of independent commissioner on the T test is negative significantly. While institutional ownership, board of commissioner and director size does not affect asymmetric information and managerial ownership is pointing to the positive direction

Exact Ground States of the Periodic Anderson Model in D=3 Dimensions

We construct a class of exact ground states of three-dimensional periodic Anderson models (PAMs) -- including the conventional PAM -- on regular Bravais lattices at and above 3/4 filling, and discuss their physical properties. In general, the f electrons can have a (weak) dispersion, and the hopping and the non-local hybridization of the d and f electrons extend over the unit cell. The construction is performed in two steps. First the Hamiltonian is cast into positive semi-definite form using composite operators in combination with coupled non-linear matching conditions. This may be achieved in several ways, thus leading to solutions in different regions of the phase diagram. In a second step, a non-local product wave function in position space is constructed which allows one to identify various stability regions corresponding to insulating and conducting states. The compressibility of the insulating state is shown to diverge at the boundary of its stability regime. The metallic phase is a non-Fermi liquid with one dispersing and one flat band. This state is also an exact ground state of the conventional PAM and has the following properties: (i) it is non-magnetic with spin-spin correlations disappearing in the thermodynamic limit, (ii) density-density correlations are short-ranged, and (iii) the momentum distributions of the interacting electrons are analytic functions, i.e., have no discontinuities even in their derivatives. The stability regions of the ground states extend through a large region of parameter space, e.g., from weak to strong on-site interaction U. Exact itinerant, ferromagnetic ground states are found at and below 1/4 filling.Comment: 47 pages, 10 eps figure

Pengaruh Pemberian Kombinasi Minyak Atsiri Rimpang Temulawak (Curcuma Xanthorriza Roxb.) Dan Kurkuminoidnya Terhadap Efek Analgetik Pada Mencit

Penelitian dilakukan untuk mengetahui efek analgetik dari minyak atsiri rimpang temulawak (Curcuma xanthorriza Roxb.), kurkuminoid, dan kombinasi keduanya. Penyarian kurkuminoid dilakukan dengan pelarut etil asetat dan heksan. Minyak atsiri diperoleh dari hasil destilasi air-uap. Uji analgetik dilakukan dengan metode formalin tes (20µL formalin 1%, intraplantar) terhadap mencit jantan galur Swiss (30±5g), umur 2 bulan. Kelompok uji meliputi CMC-Na 0,5 % p.o. (kontrol negatif), indometasin 4 mg/kgBB p.o. dan i.p. (kontrol positif), kurkuminoid 48 mg/kgBB p.o., minyak atsiri 24mg/kgBB p.o, serta kombinasinya p.o. Injeksi formalin dilakukan 1 jam setelah pemejanan sampel. Data licking time diambil pada fase I (menit 0-5) dan fase II (10-30menit) setelah injeksi formalin. Fase I mengindikasikan nyeri yang terjadi pada daerah susunan saraf pusat (SSP) sedangkan fase II pada daerah perifer. Hasil uji terhadap fase I menunjukkan daya analgetik indometasin p.o sebesar (4,96±3,26 %) dan i.p. (4,54±1,65%). Kurkuminoid dan minyak atsiri masing-masing (1,22±0,89%) dan (28,8±8,48%), sedangkan campuran (42,14±5,6%). Kurniawan (2007) melaporkan bahwa besarnya daya analgetik fase I pada morfin 5 mg/kgBB p.o. adalah (69,68±2,17%). Pada fase II minyak atsiri memiliki daya analgetik sebesar (74,63±1,97%), campuran minyak atsiri (24mg/kgBB) dan kurkuminoid (48 mg/kgBB) memiliki daya analgetik sebesar (67,56±0,59%), indometasin i.p. (49,46±1,08%) dan p.o (49,82±0,91%), serta kurkuminoid (44,80±1,46%)

Monitoring Vibration of a Model of Rotating Machine

Mechanical movement or motion of a rotating machine normally causes additional vibration. A vibration sensing device must be added to constantly monitor vibration level of the system having a rotating machine, since the vibration frequency and amplitude cannot be measured quantitatively by only sight or touch. If the vibration signals from the machine have a lot of noise, there are possibilities that the rotating machine has defects that can lead to failure. In this experimental research project, a vibration structure is constructed in a scaled model to simulate vibration and to monitor system performance in term of vibration level in case of rotation with balanced and unbalanced condition. In this scaled model, the output signal of the vibration sensor is processed in a microcontroller and then transferred to a computer via a serial communication medium, and plotted on the screen with data plotter software developed using C language. The signal waveform of the vibration is displayed to allow further analysis of the vibration. Vibration level monitor can be set in the microcontroller to allow shutdown of the rotating machine in case of excessive vibration to protect the rotating machine from further damage. Experiment results show the agreement with theory that unbalance condition on a rotating machine can lead to larger vibration amplitude compared to balance condition. Adding and reducing the mass for balancing can be performed to obtain lower vibration level

Coulomb-U and magnetic moment collapse in δ\delta-Pu

The around-the-mean-field version of the LDA+U method is applied to investigate electron correlation effects in $\delta$-Pu. It yields a non-magnetic ground state of $\delta-$Pu, and provides a good agreement with experimental equilibrium volume, bulk modulus and explains important features of the photoelectron spectra

Exotic ground states and impurities in multiband superconductors

We consider the effect of isotropic impurity scattering on the exotic superconducting states that arise from the usual BCS mechanism in substances of cubic and hexagonal symmetry where the Fermi surface contains inequivalent but degenerate pockets (e.g. around several points of high symmetry). As examples we look at CeCo$_2$, CeRu$_2$, and LaB$_6$; all of which have such Fermi surface topologies and the former exhibits unconventional superconducting behavior. We find that while these non s-wave states are suppressed by non-magnetic impurities, the suppression is much weaker than would be expected for unconventional superconductors with isotropic non-magnetic impurity scattering.Comment: 4 pages, no figure