Hasil untuk "math.RT"

Javier Blanco-Sacristán, Emilio Guirado, José Luis Molina-Pardo et al.

Wildfires affect the structure, functioning, and composition of ecosystems. Long-term monitoring of the occurrence, abundance, and growth of plant species is key to assessing the responses of the dynamics of plant populations with regard to environmental disturbances, such as wildfires. In this work, we evaluated the changes in the number of individuals and the canopy cover extent of a population of Juniperus communis L. during a four-decade period following a wildfire in a Mediterranean high-mountain ecosystem (Sierra Nevada, Spain). To do this, we used object-based image analysis (OBIA) applied to very high-resolution aerial images. Our study also provides a new approach to optimize the shrub identification process and to semi-automatically evaluate the accuracy of the number of shrubs and their canopy cover. From the 752 individuals present in 1977, only 433 remained immediately after a fire (1984), a few more disappeared one decade later (420 shrubs in 1997), while by 2008, the population had partially recovered to 578 shrubs. The wildfire decreased juniper canopy cover from 55,000 m2 to 40,000 m2, but two decades later it had already recovered to 57,000 m2. The largest shrubs were more resistant to fire than the smallest ones and recovered in a shorter time period. The protection measures introduced with the park declaration seemed to have contributed to the post-fire recovery. The potential of this methodology in the management and conservation of biodiversity in the future is also discussed.

RT Beast

Shrikant Khare, Rahul Jain, Rahul Sapate et al.

Komal Shinde, YB Shambharkar, PK Wakle et al.

Waris Ali, Asif Ali Shaikh, Feroz Shah et al.

The energy provision is one of the main concerns of modern technological processes and thermal management systems. Through latent heat energy, the storage of thermal energy using phase-change materials is examined in this paper. Paraffin Rubitherm 50 is filled in the cylinder. The base of the cylinder is heated and the vertical surface is made adiabatic. The melting procedure for two cases namely the plane surface and finned surface of the cylinder are considered. The melt fractions are observed and photographed for fixed intervals of time from solid state to total melt state. Initially, the melting of specified PCM was slow and then it became faster when convection heat transfer is accompanied with the conduction. The melting of PCM is geared with fin presence.

Hai Q. DINH, Bac Trong NGUYEN, Songsak SRIBOONCHITTA

Udo Malzer

Sapna Jain

In [16], the author introduced a new pseudo-metric on the space Matm×s(Zq) which is the module space of all m × s matrices with entries from the finite ring Zq generalizing the classical Lee metric (see [17]) and the array RT- metric (see [19]) and named this pseudo-metric as the Generalized-Lee-RT-Pseudo-Metric (or the GLRTP-Metric). In this paper, we obtain some lower bounds for two dimensional array codes correcting burst errors (see [10]) with weight constraints under the GLRTP-metric.

S P Geĭsberg