Determination of mass of IGR J17091-3624 from "Spectro-Temporal" variations during onset-phase of the 2011 outburst

The 2011 outburst of the black hole candidate IGR J17091-3624 followed the canonical track of state transitions along with the evolution of Quasi-Periodic Oscillation (QPO) frequencies before it began exhibiting various variability classes similar to GRS 1915+105. We use this canonical evolution of spectral and temporal properties to determine the mass of IGR J17091-3624, using three different methods, viz : Photon Index ($\Gamma$) - QPO frequency ($\nu$) correlation, QPO frequency ($\nu$) - Time (day) evolution and broadband spectral modelling based on Two Component Advective Flow. We provide a combined mass estimate for the source using a Naive Bayes based joint likelihood approach. This gives a probable mass range of 11.8 M$_{\odot}$ - 13.7 M$_{\odot}$. Considering each individual estimate and taking the lowermost and uppermost bounds among all three methods, we get a mass range of 8.7 M$_{\odot}$ - 15.6 M$_{\odot}$ with 90% confidence. We discuss the probable implications of our findings in the context of two component accretion flow.Comment: 10 pages, 5 figures (4 in colour), 2 tables. Accepted for publication in Ap

Noise In Nonohmic Regimes Of Disordered Systems

We present here a short review of mainly experimental properties of noise as disordered systems are driven into non-ohmic regimes by applying voltages of few volts only. It is found that the noise does not simply follow the resistance in that the direction of change of noise could be opposite to that of resistance. It is discussed how this and other properties make the noise a complementary and incisive tool for studying complex systems, particularly its dynamic properties. Study of noise in non-ohmic regimes in physical systems is rather in a nascent stage. Some of the open issues are highlighted.Comment: 9 Pages, 7 figures. Reported in Unsolved Problems of Noise and Fluctuations: UPoN 2005, Gallipoli, Italy, June 6-10, 200

Accretion disk around the rotating Damour-Solodukhin wormhole

A new rotating generalization of the Damour-Solodukhin wormhole (RDSWH), called Kerr-like wormhole, has recently been proposed and investigated by Bueno \textit{et al} for echoes in the gravitational wave signal. We show a novel feature of the RDSWH, viz., that the kinematic properties such as the ISCO\ or marginally stable radius $r_{\text{ms}}$, efficiency $\epsilon$ and the disk potential $V_{\text{eff}}$ are \textit{independent} of $\lambda$ (which means they are identical to their KBH counterparts for any given spin). Differences however appear in the emissivity properties for higher values $0.1<\lambda\leq 1$ (say) and for the extreme spin $a_{\star}=0.998$. The kinematic and emissivity are generic properties as variations of the wormhole mass and the rate of accretion within the model preserve these properties. Specifically, the behavior of the luminosity peak is quite opposite to each other for the two objects, which could be useful from the viewpoint of observations. Apart from this, an estimate of the difference $\Delta_{\lambda}$ in the maxima of flux of radiation $F(r)$ shows non-zero values but is too tiny to be observable at present for $\lambda < 10^{-3}$ permitted by the strong lensing bound. The broad conclusion is that RDSWH\ are experimentally indistinguishable from KBH by accretion characteristics.Comment: 9 pages, 3 tables, 13 figure

Kajian Penggunaan Lahan Tradisional Minangkabau Berdasarkan Kondisi Tanahnya

Minangkabau society contends the land not only for living-sources but also as symbol of social status and origin. Land is common ownership following the community social hierarchy. There are directions based on customs for the use of the land. The adage about it is “nan rato kaparumahan, tabu tumbuah dinan lereng, kok manggu kapakuburan, nan bancah ditanam sawah”. This adage was the result of adapting to environmental conditions in highland areas, as well as erodeble condition

Ungkapan Kata Hanasu, Iu, Dan Shaberu Dalam Bahasa Jepang

Di dalam bahasa Jepang banyak sekali terdapat ungkapan (hyougen) kata-kata yang bersinonim (ruigigo). Walaupun ungkapan kata-kata yang bersinonim tersebut mempunyai makna yang sama atau hampir sama, tetapi dalam pengungkapannya terdapat perbedaan. Perbedaan ini disebabkan beberapa faktor, seperti faktor waktu, tempat, sosial, kegiatan, dan nuansa makna. Kesalahan dalam pemakaian ungkapan yang bersinonim tersebut sering menimbulkan kesalahan pahaman dalam komunikasi bahkan akan menimbulkan kebingungan lawan bicara. Diantara ungkapan kata yang merupakan sinonim tersebut adalah kata hanasu, iu, dan shaberu yang mempunyai makna sama, yaitu berkata, berbicara

Taman Nasional Wasur, Mengelola Kawasan Konservasi di Wilayah Masyarakat Adat

Indonesia has established 50 national parks as part of its protectedarea. Considerations ofthe establishment of national parks by the government were based on the conditions of native ecosystems and biodiversity conservation targets. Consideration was also as sociated with the development of recommendations made in the IUCN\u27s World Park Congresses. It is a fact that some national parks were occupying some indigenous lands, such as Wasur National Park which occupied indigenous territories of Kanum, Marind-Kondo, Marori Men-gey and Yeinan Ethnics. These indigenous peoples have established natural resource management systems that were intimately associated with their traditions and beliefs. Discrepancy between government policies on conservation are as with the pattern of arrangement on indigenous peoples as owners of the area led to the emergence of conflict and marginalization of indigenous peoples\u27 rights. Realizing the error in the perspective of conservation area management related to indigenous peoples, in the 5th World Park Congress in Durban, South Africa in 200, a recommendation was agreed on the importance of collaboration in the equality and mutual benefit between parks\u27 managers with indigenous peoples, and positioning indigenous peoples\u27 rightsasan important part in conservation area management system today and the future