A major component of urban management is studying and evaluating resilience in order to minimize the effects natural hazards. This because increasing number hazards occurring worldwide. spatial decision support system presented for modeling selecting resilient zones response implemented based on 22 criteria, grouped into three categories: demographics, infrastructure, environmental. The criteri...

The Gap Analysis Program (GAP) is a nationwide effort to find areas of suitable habitat in the US, which if protected from habitat degradation, may help to preserve the native animal and plant biodiversity. In recent years, the GAP protocols used to analyze habitat data have become more scale and species dependent. This research describes the creation of a Spatial Decision Support System (SDSS)...

Climate change risk reduction requires cities to undertake urgent decisions. One of the principal obstacles that hinders effective decision making is insufficient spatial knowledge frameworks. Cities climate adaptation planning must become strategic rethink and transform urban fabrics holistically. Contemporary should merge future threats with older unsolved criticalities, like social inequitie...

We present a study of quasar selection using the supernova fields of the Dark Energy Survey (DES). We used a quasar catalog from an overlapping portion of the SDSS Stripe 82 region to quantify the completeness and efficiency of selection methods involving color, probabilistic modeling, variability, and combinations of color/ probabilistic modeling with variability. In all cases, we considered o...

From what I see in Figure 1, of the 1.3 million files in DR4, only 350K some files have any objects in them. What is also interesting is that the objects are not uniformly distributed over the data files, but that there is a normal-like distribution to the number of files with low/medium/high number of objects per file. Comment [IR1]: Are the 320M objects I have from DR4 representative of all t...

Starting from the quasar sample of the Sloan Digital Sky Survey (SDSS) for which the Civ line is observed, we use an analysis scheme to derive the z-dependence of the maximum mass of active black holes, which overcomes the problems related to the Malmquist bias. The same procedure is applied to the low redshift sample of SDSS quasars for which Hβ measurements are available. Combining with the r...

46990 objects, which were primarily identified as quasars in SDSS DR5 and have spectroscopic redshifts were used to study the luminosity dependence of the quasar clustering with the help of two different techniques. The obtained results reveal that brighter quasars are more clustered, but this dependence is weak, which is in agreement with the results by Porciani & Norberg [1] and theoretical p...

We present single-epoch multi-wavelength optical-NIR observations of the “anomalous” lensed quasar SDSS J0924+0219, made using the Magellan 6.5-metre Baade telescope at Las Campanas Observatory, Chile. The data clearly resolve the anomalous bright image pair in the lensed system, and exhibit a strong decrease in the anomalous flux ratio with decreasing wavelength. This is interpreted as a resul...