given the critical role played by urban green spaces and the emergence of remote sensing as avaluable natural resource management tool, this study sought to identify trends in green spaces within thecontext of south africa’s transition period (1990 - 2000). using the city of port elizabeth as a case study, threesets of landsat - 5 thematic mapper images (1990, 1995 and 2000) were geo-processed,...

this study investigated single-step extraction of heavy metals from contaminated sedimentscollected in the port of cádiz. experimental tests of washing with an aqueous solution of a chelating agent wereperformed at selected solid/liquid (s/l) ratios. two chelating agents were chosen: 0.3 m edta(ph 3.8 and 8)and sodium citrate (1 m). the objective of the tests was to investigate extractive decon...

This paper introduces a mixed integer programming model to find the optimum development plan for port Anzali. The model minimizes total system costs taking into account both port infrastructure costs and shipping costs. Due to the multipurpose function of the port, the model consists of 1020 decision variables and 2490 constraints. Results of the model determine the optimum number of berths tha...

In this paper we present a unifying geometric framework for modeling various sorts of physical network dynamics as port-Hamiltonian systems. Basic idea is to associate with the incidence matrix of the graph a Dirac structure relating the flow and effort variables associated to the edges, internal vertices, and boundary vertices of the graph. This Dirac structure captures the basic conservation/...

Due to the large contribution of the coldstart process to unburned hydrocarbon emissions of an internal combustion engine during FTP cycle tests, we take a new look at the production of hydrocarbons inside the combustion chamber during coldstart. To this end a model is developed which predicts the exhaust port hydrocarbon concentration, exhaust gas temperature and equivalence ratio based on a s...

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Minimally invasive cardiothoracic combined surgery was performed successfully in an octogenerian with left anterior descending coronary artery disease and concurrent adenocarcinoma in the lingular segment of emphysematous lung. Through a limited anterior 4th intercostal thoracotomy, left anterior descending coronary artery bypass grafting without cardiopulmonary bypass was carried out using the...

This paper presents a new packet scheduling scheme, called Frame-based Exhaustive Matching (FEM), to efficiently resolve the contention in a 3-stage Clos-network photonic switch. Using extended frames to aggregate cells from different incoming lines, the extended frame relaxes the stringent arbitration time constraint at the ultrafast port speed achievable in the photonic switch fabric. We also...

Recent advances in surgical techniques have trended toward minimally invasive procedures. Currently, a laparoscopic approach has become the gold standard for splenectomy because it is an effective, reliable technique requiring a shorter hospitalization period with fewer surgical complications, less morbidity, and better esthetic results (1). However, as the number of ports increases in laparosc...

This application note provides a method to dynamically change the clock output frequency, phase shift, and duty cycle of the mixed-mode clock manager (MMCM) for the Xilinx® 7 series and UltraScaleTM FPGAs. Similarly, the phase-locked loop (PLL) can be changed through the dynamic reconfiguration port (DRP). An explanation of the behavior of the internal DRP control registers is accompanied by a ...