Weak localization in macroscopically inhomogeneous two-dimensional systems: a simulation approach

A weak-localization effect has been studied in macroscopically inhomogeneous 2D system. It is shown, that although the real phase breaking length tends to infinity when the temperature tends to zero, such a system can reveal a saturated behavior of the temperature dependence of that parameter, which is obtained from the standard analysis of the negative magnetoresistance and usually identified by experimentalists with the phase braking length.Comment: 5 pages, 4 figure

Analisis Pengakuan, Pengukuran dan Pengungkapan Pendapatan dan Beban Berdasarkan PSAK No. 36 pada Ajb Bumiputera 1912 Manado

PSAK No.36 adalah standar akuntansi yang mengatur pendapatan, beban, liabilitas dan aset reasuransi dalam asuransi jiwa. AJB Bumiputera 1912 Manado menerapkan premi selain kontrak jangka pendek, pendapatan lain, klaim telah disetujui, klaim dalam proses penyelesaian dan klaim yang terjadi namun belum dilaporkan, AJB Bumiputera tidak menerapkan pengungkapan catatan atas laporan keuangan dalam Perusahaan dan pengakuan pendapatan premi kontrak jangka pendek. Tujuan penelitian ini untuk mengetahui bagaimana pengakuan, pengukuran dan pengungkapan pendapatan dan beban pada AJB Bumiputera 1912 Manado. Teknik pengumpulan data dilakukan dengan teknik wawancara dan studi pustaka. Menggunakan metode analisis deskriptif, teknik analisis data yaitu membandingkan teori dengan prosedur yang ditetapkan Perusahaan. Hasil penelitian diketahui bahwa manajemen Perusahaan telah menerapkan premi selain jangka pendek, pendapatan lain, dan beban klaim berdasarkan PSAK No.36, juga belum menerapkan premi jangka pendek dan pengungkapan catatan atas laporan keuangan berdasarkan PSAK No.36. Sebaiknya manajemen AJB Bumiputera untuk terus mengikuti standar PSAK No.36 dalam pengakuan, pengukuran dan pengungkapan pendapatan dan beban pada asuransi jiwa. Kata kunci : pengakuan, pengukuran, pengungkapan, pendapatan, beba

Interference quantum correction to conductivity of Al xGa 1-xAs/GaAs double quantum well heterostructures near the balance

We present the results of experimental investigations of the interference quantum correction to the conductivity of the gated double quantum well Al xGa 1-xAs/GaAs/Al xGa 1-xAs heterostructures. Analyzing the positive magnetoconductiv-ity we obtain the interwell transition rate and the phase relaxation rate under the conditions when one and two quantum wells are occupied. It has been found that the interwell transition rate resonantly depends on the difference between the electron densities in the wells in accordance with the theoretical estimate. The central point, however, is that the dephasing rate in the lower quantum well is independent of whether the upper quantum well contributes to the conductivity or not. The results obtained are interpreted within framework of the recent theory for the dephasing and electron-electron interaction in the double well structures [Burmistrov I S, Gornyi I V and Tikhonov K S 2011 Phys. Rev. B 84 075338]

CAPITAL ASSET PRICING MODEL: AN EVIDENCE OF RISK AND RETURN OF INVESTMENT OF COMPANIES AT FOOD AND BEVERAGE SUB SECTOR AT INDONESIA STOCK EXCHANGE

The economic development of a country surely is goal for any country. There are many ways that can be done to measure it, one of them by knowing the level of development of capital markets and securities industries in the country. This study aimed to measure and analyze food and beverage sub sector of the Indonesian Stock Exchange using Capital Asset Pricing Model. The sample used is active companies in stock transaction, such as: ADES, AISA, ALTO, CEKA, ICBP, INDF, MLBI, MYOR, ROTI, ULTJ listed in food and beverage sub sectors. Based on the results of the study, it can conclude that after analyzing the food and beverage sub sector of the Indonesian Stock Exchange using Capital Asset Pricing Model, Beta that is significant shows that the stock is worthy to invest, and they are AISA, INDF, ICBP and ROTI based on the period observed from January to March 2015. This indicate that in the first quarter of 2015, the four stocks shows great promises for investor to invest and out of the four, ICBP has positive rate of return

CAPITAL ASSET PRICING MODEL METHOD USED IN MEASURING AND ANALYZING COMPANIES LISTED IN PEFINDO25 AT INDONESIA STOCK EXCHANGE PERIOD 2015

The industry in Indonesia is an interesting business to capitalize. In Indonesia many companies were established since it is profitable. The capital market serves as an economic pillar in most countries. Indonesia is a rich country, rich in many ways especially in natural resources. However, the industry has its ups and downs in the stock market. It is interesting to see the performance of the companies listed in the Indonesia Stock Exchange.  This study aimed to measure and analyze companies listed in Pefindo25 at Indonesian Stock Exchange using Capital Asset Pricing Model. The sample used is 25 companies listed at Pefindo25 index. Based on the results of the study, it can conclude that after analyzing the companies listed in the Indonesian Stock Exchange using Capital Asset Pricing Model that based on Beta analysis, the companies have the type of stocks that are aggressive and defensive. With positive and negative return. The company with aggressive beta shows that the company tend to face higher risk, as JPFA find itself with positif return 15.47% expected return. And companies with defensive type of stocks tend to have positive return such as: FISH, STTP, AISA, APLN, and others since they are not sensitive to market changes. It is recommended for further research to look on this CAPM method in analyzing the stock investment

Oligochaete distribution patterns in two German hardwater lakes of different trophic state

AbstractWe investigated the effect of contrasting trophic conditions on the distribution and dominance patterns of Oligochaeta species assemblages in lake sediments and their relation to the environmental variables depth, season, and substrate. The study was performed on the highly eutrophic Lake Haussee and the oligotrophic Lake Stechlin, both hardwater lakes in the Baltic Lake District of Northern Germany. Quantitative monthly and seasonal sampling took place over one year at 14 representative sites, covering littoral and profundal sediments of both lakes. Between-lake differences in the profundal were clearcut with an absence of any zoobenthos in Lake Haussee and a peculiar meiobenthic species assemblage in Lake Stechlin (Collado et al. 1999). Between-lake differences in the littoral, however, were small and mainly attributable to a small number of species exclusive to Lake Stechlin and an overall higher abundance of oligochaetes, especially naidids, in Lake Haussee. Species-richest family in both lakes were Naididae; Tubificidae were dominant in Lake Stechlin; in Lake Haussee Tubificidae and Naididae were equally abundant. Most striking were diversity of habitat types and species distribution patterns in the littoral. Multivariate analysis (CA, CCA) showed that the distribution patterns of oligochaete species assemblages are significantly correlated with depth, season and substrate. Depth is the major factor when the whole water body is considered. When confining to the littoral, species abundance and distribution are strongly related to seasonality and substrate type. Naididae show, in general, maximal abundances in autumn and summer and a preference for plants, plant debris and soft sediments; Tubificidae are more abundant in spring and prefer mineral substrate. The relation between seasonality, substrate and food availability is discussed