Electron density profiles in the background of LF absorption during Forbush-decrease and PSE

Based on the simulation of different Forbush decrease and particle precipitation effects in the D region, electron density profiles in the mid-latitudes the ionospheric absorption of low frequency (LF) radio waves was determined. The absorption variations at different frequenceis are strongly affected by the shape of the electron density profile. A structure appears which sometimes resembles the letter S (in a sloping form). Both the height (around 70 to 72 km) and the depth of the local minimum in the electron density contribute to the computed absorption changes of various degree at different frequencies. In this way several observed special absorption events can be interpreted

Solar Terrestrial Influences on the D Region as Shown by the Level of Atmospheric Radio Noise

Measurements of the integrated atmospheric radio noise field strength at 27 kHz, used here, were made from 1965 to 1975 at Uppsala, Kuhlungsborn, and Prague-Panska Ves. The large scale meteorological situation was considered by comparing solar disturbed and undisturbed periods under similar weather situations. In order to show the effects of the precipitating high energy particle (HEP) flux and of the Forbush decrease on the noise level between pairs of stations were computed as deviations from the monthly median. Delta E (dB), day by day for all six periods was studied. The correlation coefficients for noon as well as for night values were computed. The correlation coefficients were compared with those for solar undisturbed periods

Quantum Corrals, Eigenmodes and Quantum Mirages in s-wave Superconductors

We study the electronic structure of magnetic and non-magnetic quantum corrals embedded in s-wave superconductors. We demonstrate that a quantum mirage of an impurity bound state peak can be projected from the occupied into the empty focus of a non-magnetic quantum corral via the excitation of the corral's eigenmodes. We observe an enhanced coupling between magnetic impurities inside the corral, which can be varied through oscillations in the corral's impurity potential. Finally, we discuss the form of eigenmodes in magnetic quantum corrals.Comment: 4 pages, 4 figure

KONTRIBUSI PERBANKAN SYARIAH TERHADAP TINGKAT PERTUMBUHAN EKONOMI DAN KEMISKINAN DI INDONESIA

Satori Ilyas : “Kontribusi Perkembangan Perbankan Syariah terhadap Tingkat Pertumbuhan Ekonomi dan Kemiskinan di Indonesia”. Semenjak berdirinya perbankan syariah dengan system yang sesuai prinsipprinsip islam. Dinilai cukup humanis dengan menggunakan system bagi hasil, sehingga industry perbankan di indonesia semakin ramai. Perkembangan perbankan syariah cukup pesat dalam kurun waktu sepuluh tahun, hal ini dibuktikan dengan banyaknya kantor cabang yang telah dibuka di wilayah Indonesia, bahkan bank konvensional juga membuka kantor cabang syariah. Tujuan dan fungsi perbankan syariah berdasarkan teori adalah untuk membantu mensejahterakan kehidupan masyarkat, khususnya masyarakat miskin. Namun pertumbuhan ekonomi di Indonesia dirasakan cukup lamban dan kemiskinan di Indonesia masih tumbuh subur. Permasalahan yang muncul adalah seberapa besar kontribusi perkembangan perbankan syariah ditinjau dari financing to deposit rasio terhadap tingkat pertumbuhan ekonomi produk domestik bruto dan kemiskinan di Indonesia. Penelitian ini bertujuan untuk menjelaskan tingkat kontribusi perbankan syariah ditinjau dari financing to deposit rasio terhadap tingkat pertumbuhan ekonomi produk domestik bruto dan kemiskinan di Indonesia dengan menggunakan data sekunder dari Bank Indonesia dan Biro Pusat Statistik. Jenis Penelitian ini menggunakan library research yaitu dilaksanakan dengan menggunakan literatur (kepustakaan) dari penelitian sebelumnya. Hasil penelitian membuktikan bahwa kontribusi perbankan syariah yang ditinjau dari financing to deposit rasio terhadap tingkat pertumbuhan ekonomi produk dome

Antimatter applied for Earth protection from asteroid collision

An Earth protection system against asteroids and meteorites in colliding orbit is proposed. The system consists of detection and deorbiting systems. Analyses are given for the resolution of microwave optics, the detectability of radar, the orbital plan of intercepting operation, and the antimatter mass require for totally or partially blasting the asteroid. Antimatter of 1 kg is required for deorbiting an asteroid 200 m in diameter. An experimental simulation of antimatter cooling and storage is planned. The facility under construction is discussed

Numerical model of the Gross-Pitaevskii equation for vortex lattice formation in rotating Bose-Einstein condensates using smoothed-particle hydrodynamics

This study proposed a new numerical scheme for vortex lattice formation in a rotating Bose-Einstein condensate (BEC) using smoothed particle hydrodynamics (SPH) with an explicit real-time integration scheme. Specifically, the Gross-Pitaevskii (GP) equation was described as a complex representation to obtain a pair of time-dependent equations, which were then solved simultaneously following discretization based on SPH particle approximation. We adopt the 4th-order Runge-Kutta method for time evolution. We performed simulations of a rotating Bose gas trapped in a harmonic potential, showing results that qualitatively agreed with previously reported experiments and simulations. The geometric patterns of formed lattices were successfully reproduced for several cases, for example, the pentagonal lattice observed in the experiments of rotating BECs. Consequently, it was confirmed that the simulation began with the periodic oscillation of the condensate, which attenuated and maintained a stable rotation with slanted elliptical shapes; however, the surface was excited to be unstable and generated ripples, which grew into vortices and then penetrated the inside the condensate, forming a lattice. We confirmed that each branch point of the phase of wavefunctions corresponds to each vortex. These results demonstrate our approach at a certain degree of accuracy. In conclusion, we successfully developed a new SPH scheme for the simulations of vortex lattice formation in rotating BECs