Power-Law Distributions in Circulating Money: Effect of Preferential Behavior

We introduce preferential behavior into the study on statistical mechanics of money circulation. The computer simulation results show that the preferential behavior can lead to power laws on distributions over both holding time and amount of money held by agents. However, some constraints are needed in generation mechanism to ensure the robustness of power-law distributions.Comment: 4 pages, 2 figure

Non-damping oscillations at flaring loops

Context. QPPs are usually detected as spatial displacements of coronal loops in imaging observations or as periodic shifts of line properties in spectroscopic observations. They are often applied for remote diagnostics of magnetic fields and plasma properties on the Sun. Aims. We combine imaging and spectroscopic measurements of available space missions, and investigate the properties of non-damping oscillations at flaring loops. Methods. We used the IRIS to measure the spectrum over a narrow slit. The double-component Gaussian fitting method was used to extract the line profile of Fe XXI 1354.08 A at "O I" window. The quasi-periodicity of loop oscillations were identified in the Fourier and wavelet spectra. Results. A periodicity at about 40 s is detected in the line properties of Fe XXI, HXR emissions in GOES 1-8 A derivative, and Fermi 26-50 keV. The Doppler velocity and line width oscillate in phase, while a phase shift of about Pi/2 is detected between the Doppler velocity and peak intensity. The amplitudes of Doppler velocity and line width oscillation are about 2.2 km/s and 1.9 km/s, respectively, while peak intensity oscillate with amplitude at about 3.6% of the background emission. Meanwhile, a quasi-period of about 155 s is identified in the Doppler velocity and peak intensity of Fe XXI, and AIA 131 A intensity. Conclusions. The oscillations at about 40 s are not damped significantly during the observation, it might be linked to the global kink modes of flaring loops. The periodicity at about 155 s is most likely a signature of recurring downflows after chromospheric evaporation along flaring loops. The magnetic field strengths of the flaring loops are estimated to be about 120-170 G using the MHD seismology diagnostics, which are consistent with the magnetic field modeling results using the flux rope insertion method.Comment: 9 pages, 9 figures, 1 table, accepted by A&

Akurasi Sistem Registrasi Kematian dan Penyebab Kematian (Studi Tipikal Sejumlah Daerah di Indonesia) Masih Perlu Banyak Peningkatan: Sistem Registrasi Kematian dan Penyebab Kematian di Beberapa Daerah, Indonesia 2014

Death Registrations System and Cause of Death are fundamental in creating demographic andepidemiological measures needed by regional planning in various sectors, such as education,employment and health. The aims of this study are to address the strengths and weaknesses of the Death Registrations System and Causes of Death in several regions in Indonesia; so they will know the areas that require improvement and actions that need to be done. The current system status is determined using a rapid assessment which has been developed by WHO and Health Information Systems Knowledge Hub, from the University of Queensland (2010a). Twenty-five questions were discussed by participants consisting of 2–4 groups of senior staffs responsible for various aspects ofthe Death Registration System and Cause of Death. The assessment was conducted in 13 districts/municipalities in 2014. As a result, there are still some aspects of the function of the system should beimproved. Regions with a high enough value is Surakarta (80%) and Yogyakarta (68%) included in thecategory of moderate or 65–84; functional but not sufficient. The average area with values below 64%,is classified as weak. There are variations in the strength and a weakness of each region. It is importantto develop appropriate strategies to obtain Death Registrations System and Cause of Death better.Keywords: rapid assessment, Death Registrations and Cause of Death, Indonesia

Generating Realistic Synthetic Population Datasets

Modern studies of societal phenomena rely on the availability of large datasets capturing attributes and activities of synthetic, city-level, populations. For instance, in epidemiology, synthetic population datasets are necessary to study disease propagation and intervention measures before implementation. In social science, synthetic population datasets are needed to understand how policy decisions might affect preferences and behaviors of individuals. In public health, synthetic population datasets are necessary to capture diagnostic and procedural characteristics of patient records without violating confidentialities of individuals. To generate such datasets over a large set of categorical variables, we propose the use of the maximum entropy principle to formalize a generative model such that in a statistically well-founded way we can optimally utilize given prior information about the data, and are unbiased otherwise. An efficient inference algorithm is designed to estimate the maximum entropy model, and we demonstrate how our approach is adept at estimating underlying data distributions. We evaluate this approach against both simulated data and on US census datasets, and demonstrate its feasibility using an epidemic simulation application

A study of optical fibre interferometric systems using multimode laser diode light sources

Optical fibre sensing techniques are playing an increasingly important role in applications where precise and non-destructive measurements are required. Not only are traditional electronically based sensors being gradually replaced by their optical fibre analogues, but also the classical optical measuring devices, such as bulk optical interferometers, are being reconfigured as devices constructed from optical fibre and fibre components. On the other hand, the availability of different types of light sources with different spectral distributions, such as light emitting diodes, single mode and multimode laser diodes, opens up the possibility of widely use these sources for optical fibre sensor applications. The main theme of this thesis is a series of investigations of the characteristics of the output from interferometric systems that use multimode laser diodes as their low coherence light sources. The multimode laser diode, developed recently in commercial quantities for use with the compact disc player, offer high light output levels in a small emitting area, which makes it the preferred choice for optical fibre sensor applications. The discussions began with a general introduction to the thesis. In chapter 1 the principle of optical sensing by using an interferometer is introduced and an outline of the basic framework of this thesis can be seen. Based upon a new classification of the optical fibre sensing techniques, a general discussion and a review of interferometric systems using low coherence light sources are shown in chapters 3 and 4 respectively. By using a new electronic signal processing scheme, a common-mode bulk interferometer was replaced with its optical fibre analogue, which is described in chapter 5. The main characteristics of the output intensity distribution from several types of interferometric systems which were illuminated by light from multimode laser diodes were intensively studied both theoretically and experimentally. The results of the investigation and the possible applications of using the schemes developed in this work are shown in the chapters 6 to 9. A general conclusion and suggestions for the future of the work are presented

Possible superconductivity above 25 K in single crystalline Co-doped BaFe2_{2}As2_{2}

We present superconducting properties of single crystalline Ba(Fe$_{0.9}$Co$_{0.1}$)$_{2}$As$_{2}$ by measuring magnetization, resistivity, upper critical field, Hall coefficient, and magneto-optical images. The magnetization measurements reveal fish-tail hysteresis loop at high temperatures and relatively high critical current density above $J_{c}=10^{5}$ A/cm$^{2}$ at low temperatures. Upper critical field determined by resistive transition is anisotropic with anisotropic parameter $\sim$ 3.5. Hall effect measurements indicate that Ba(Fe$_{0.9}$Co$_{0.1}$)$_{2}$As$_{2}$ is a multiband system and the mobility of electron is dominant. The magneto-optical imaging reveals prominent Bean-like penetration of vortices although there is a slight inhomogeneity in a sample. Moreover, we find a distinct superconductivity above 25 K, which leads us to speculate that higher transition temperature can be realized by fine tuning Co-doping level.Comment: 4 pages, 5 figure

Pair Distribution Function of One-dimensional "Hard Sphere" Fermi and Bose Systems

The pair distributions of one-dimensional "hard sphere" fermion and boson systems are exactly evaluated by introducing gap variables.Comment: 4 page

Pion Interferometry for Hydrodynamical Expanding Source with a Finite Baryon Density

We calculate the two-pion correlation function for an expanding hadron source with a finite baryon density. The space-time evolution of the source is described by relativistic hydrodynamics and the Hanbury-Brown-Twiss (HBT) radius is extracted after effects of collective expansion and multiple scattering on the HBT interferometry have been taken into account, using quantum probability amplitudes in a path-integral formalism. We find that this radius is substantially smaller than the HBT radius extracted from the freeze-out configuration.Comment: 4 pages, 2 figure

Analisis Perbedaan Tingkat Suku Bunga pada Perhitungan Jaminan Hari Tua (JHT)

The purpose of this paper is to analyze the difference in interest rates on the calculation of pension funding. The interest rate varies grouped based on the rules set by the fuzzy numbers trapezoidal membership function. The results showed that the trapezoidal membership function and value of tolerance 0.02 earned four interest rate is 3.76%, 5.76%, 11.83% and 13.83%. The lower the interest rate, the lower the pension contribution paid, as well as actuarial liabilities, and conversely, the greater the interest rate, old age insurance contributions and actuarial liabilities is getting smaller