Limestone is a sedimentary rock that is composed mostly of calcium carbonate (CaCO3). Limestone is, among many applications, used as a raw material for the manufacture of quicklime. When limestone is heated, the stone calcinates and quicklime is formed. The primary use of quicklime is in the steel and …

In this study, we present the e ects of time and temperature on the formation of urea deposits and their composition under conditions realistic to mobile heavy-duty SCR applications. To this end, various synthesis times were evaluated (1 h, 4 h and 24 h), as well as temperatures (298–673 K). The formed …

The natural value of Dutch sandy beaches has been declining for decades. These relatively unstable, low nutritious, wave-washed environments lack the primary producers that represent the base of the food web. Thus, the sandy beach food web relies almost entirely on nutrient influx of other systems. Beside …

Decomposition is an ecosystem process, mainly important in the carbon and nitrogen cycles. When looking at what drives decomposition, there are three major drivers. These are plant litter quality, microbes and soil animals (detritivores). A large problem in understanding the decomposition process is …

Airports and surrounding airspaces are limited in terms of capacity and represent the major bottlenecks of the air traffic management system. This paper addresses the problems of terminal airspace management and airport congestion management at the macroscopic level through the integrated control of …

Past decades traditional agricultural landscapes characterized by a wide variety of grasslands, field boundaries, watercourses, and trees started to disappear. Population growth required an ever-increasing demand for food and traditional agricultural systems were converted to monocultures. With this …

Airports and surrounding airspaces are limited in terms of capacity and represent the major bottleneck in the air traffic management system. This paper proposes a two level model to tackle the integrated optimization problem of arrival, departure, and surface operations. The macroscopic level considers …

This report is part of a collaborated study initiated by the SEnSOR programme to assess each of the compartments of aboveground carbon (AGC) stocks in fragmented lowland dipterocarp forests in Sabah. The biomass and carbon contents of living trees and coarse woody debris, lianas, fine woody debris (FWD) …

Tropical forest in Tabalong district South Kalimantan are under threat by external factors; one of the main threats to the forests are coal mining operations. Coal mining operations are temporary land use activities because of this mine rehabilitation is an important part of the mine development process.Mine …

Author supplied: "This paper gives a linearised adjustment model for the affine, similarity and congruence transformations in 3D that is easily extendable with other parameters to describe deformations. The model considers all coordinates stochastic. Full positive semi-definite covariance matrices and …