Electric-Field Gradient at Cd Impurities in In2o3. A FLAPW Study

We report an ab initio study of the electric-field gradient tensor (EFG) at Cd impurities located at both inequivalent cationic sites in the semiconductor In2O3. Calculations were performed with the FLAPW method, that allows us to treat the electronic structure of the doped system and the atomic relaxations introduced by the impurities in the host lattice in a fully self-consistent way. From our results for the EFG (in excellent agreement with the experiments), it is clear that the problem of the EFG at impurities in In2O3 cannot be described by the point-charge model and antishielding factors.Comment: 4 pages, 2 figures, and 2 table

Chemical characterization and economic evaluation of the coal fly ash pre-washing and carbonation process

In the present laboratory-scale study, the combination of washing and carbonation processes was examined to evaluate the feasibility to reduce the environmental impact of coal power plants. Three different washing solutions (tap, distilled and sea water) were used to pre-treat coal fly ash and the corresponding effect on direct gas-solid carbonation and final metal leaching was evaluated. Finally, a preliminary economic evaluation of the process was performed. In terms of captured CO2, the results have shown that significant amounts can be captured, although, as expected, the leaching of soluble salts in water such as Ca and Mg reduce the CO2 uptake. In terms of heavy metal's leaching, the application of pre-washing and carbonation treatment significantly affected the metal immobilization on the final residue. The pre-washing with sea water allowed to reach a sensible improvement since only selenium, chlorides and sulphates resulted outside the range for disposing of the carbonated residue in landfill for non-hazardous waste

Solvent recovery system for a CO2-MEA reactive absorption-stripping plant

The solvent recovery section from the exhaust gas represents an important auxiliary part for an industrial CO2 post-combustion capture plant by the reactive absorption-stripping process. In this work, a partial condenser and a water-wash section configuration were designed to reach 1 ppm of solvent in the exhaust gas, and compared using the Total Annual Cost (TAC) as economic index. Both the configurations ensured the required recovery performance. The results highlighted that the partial condenser alternative is more convenient in terms of capital annualized costs and water make-up, but at the same time it is strongly penalized by the high operating costs for the cooling water. Therefore, the configuration in which the absorber is equipped with the water-wash section resulted the option with the minimum TAC

Adaptive feedback control for a pasteurization process

The milk pasteurization process is nonlinear in nature, and for this reason, the application of linear control algorithms does not guarantee the obtainment of the required performance in every condition. The problem is here addressed by proposing an adaptive algorithm, which was obtained by starting from an observer-based control approach. The main result is the obtainment of a simple PI-like controller structure, where the control parameters depend on the state of the system and are adapted online. The proposed algorithm was designed and applied on a simulated process, where the temperature dependence of the milk's physical properties was considered. The control strategy was tested by simulating different situations, particularly when time-varying disturbances entered the system. The use of the adaptive rule reduces the variance generally introduced by the PI or PID controller

Performance and Evaluation of the Global Modeling and Assimilation Office Observing System Simulation Experiment

The National Aeronautics and Space Administration Global Modeling and Assimilation Office (NASA/GMAO) has spent more than a decade developing and implementing a global Observing System Simulation Experiment framework for use in evaluting both new observation types as well as the behavior of data assimilation systems. The NASA/GMAO OSSE has constantly evolved to relect changes in the Gridpoint Statistical Interpolation data assimiation system, the Global Earth Observing System model, version 5 (GEOS-5), and the real world observational network. Software and observational datasets for the GMAO OSSE are publicly available, along with a technical report. Substantial modifications have recently been made to the NASA/GMAO OSSE framework, including the character of synthetic observation errors, new instrument types, and more sophisticated atmospheric wind vectors. These improvements will be described, along with the overall performance of the current OSSE. Lessons learned from investigations into correlated errors and model error will be discussed

RENDICONTO SULL’ATTIVITA’ DI SORVEGLIANZA SVOLTA NEL 2008 (1 Gennaio – 31 Dicembre 2008)MISURE GRAVIMETRICHE AI CAMPI FLEGREI

Nel 2008 sono state effettuate due campagne gravimetriche ai Campi Flegrei; la prima nel mese di febbraio, la seconda dal 20 ottobre al 11 novembre. In entrambre le campagne le misure sono state rilevate sull’intera rete che, nel corso della secondo rilevamento, è stata amplianta con l’istituzione di due nuovi vertici posizionati lungo la linea costiera, e precisamente tra le stazioni di Bagnoli e La Pietra

Simulation of AMVs for OSSEs

An algorithm to simulate locations of atmospheric motion vectors (AMVs) for use in observing system simulation experiments (OSSEs) is described and demonstrated. It is intended to obviate likely deficiencies in nature run data [standard meteorological parameters and aerosol tracers] if used to produce images for feature tracking. The algorithm employs probabilistic functions that are tuned based on distributions of real observations and histograms of nature run fields. For distinct observation types, the algorithm produces geographical and vertical distributions, time - mean counts, and typical spacings of simulated locations that are, at least, qualitatively similar to those of real observations and are associated with nature run cloud and water vapor fields. It thus appears suitable for generating realistic atmospheric motion vectors for use in observing system simulation experiments

RENDICONTO SULL’ATTIVITA’ DI SORVEGLIANZA SVOLTA NEL 2008 (1 Gennaio – 31 Dicembre 2008) MISURE GRAVIMETRICHE AL VESUVIO

Nel corso del 2008 sono state eseguite due campagne gravimetriche nell’area vesuviana; la prima nel mese di aprile, la seconda a cavallo dei mesi di novembre e dicembre. In entrambe le campagne, i dati sono stati rilevati su 31 dei 32 vertici costituenti la rete in quanto la stazione “Baracche Forestali”, ubicata lungo la linea che corre all’interno della Forestale, è andata distrutta nel 2007 a causa di lavori di ripristino nell’area

Keberhasilan Inseminasi Buatan Menggunakan Semen Beku Dan Semen Cair Pada Sapi Peranakan Ongole

The purpose of this research was to know about the successfully artificial insemination (AI) using frozen and liquid semen of Ongole cross (PO) cattle indicated by Service per Conception (S/C), Days Open (DO) dan Conception Rate (CR). The materials used were 60 heads of Ongole crossbred cattle which were selected purposively using some criteria, such as having calving experience, healthy, and free from any reproduction disorder. This field experiment consisted of direct observation and interview to acquire primary and secondary data. Datas were analyzed descriptively and continued by a paired t-test. The results showed that the value of (S/C) was very significantly different (P<0.01), DO was not significantly different (P>0.05). CR for P1, P2, P3, and P4 was found 63.33% , 86.67%, 16.33%, 83.33% respectively. The conclusion of this research was AI using frozen and liquid semen with only 5 days preservation had a difference on the value of service per conception. The most successfull AI was found higher in the liquid semen which was stored for 1 and 5 days than that of frozen semen

Rituales de ausencias: una lectura de <i>Saudades</i> de Sandra Lorenzano

La presente ponencia plantea una lectura de la obra ficcional de Sandra Lorenzano Saudades a partir de la noción de ´vida desnuda´ propuesta por Giorgio Agamben, la cual me permite establecer una serie de relaciones entre la representación de los personajes de la novela y la política hegemónica que los enmarca, determinando una dislocación del sujeto y un corrimiento o destitución de su estatuto como tal.Mesa: La Construcción Ficcional: invenciones y reinvenciones Coordina: Adriana MassaCentro de Estudios de Teoría y Crítica Literari