Search results for "Operation"

Density functional theory based screening of ternary alkali-transition metal borohydrides: a computational material design project.

2009

We present a computational screening study of ternary metal borohydrides for reversible hydrogen storage based on density functional theory. We investigate the stability and decomposition of alloys containing 1 alkali metal atom, Li, Na, or K M1; and 1 alkali, alkaline earth or 3d / 4d transition metal atom M2 plus two to five BH4  groups, i.e., M1M2BH42‐5, using a number of model structures with trigonal, tetrahedral, octahedral, and free coordination of the metal borohydride complexes. Of the over 700 investigated structures, about 20 were predicted to form potentially stable alloys with promising decomposition energies. The M1Al/ Mn/ FeBH44, Li/ NaZnBH43, and Na/ KNi/ CoBH43 alloys are …

ChemInform Abstract: Comprehensive Uranium Thiophosphate Chemistry: Framework Compounds Based on Pseudotetrahedrally Coordinated Central Metal Atoms.

2014

The new ternary compounds UP2S6 (I), UP2S7 (II), U(P2S6)2 (III), and U3(PS4)4 (IV) are prepared from polysulfide fluxes (evacuated quartz tube, 1.

Predicting the Breakthrough of Ternary Ca–Uranyl–Carbonate Species in Mineral Water Treated by a Fixed-Bed Granular Ferric Hydroxide Adsorbent

2020

A CD-MUSIC surface complexation model was set up on the basis of batch equilibrium experiments with uranyl ions and akaganeite-based granular ferric hydroxide (GFH), which is often used in water pu...

Multiple Objective Analysis of Input-Output Models for Emergency Management

1990

This paper shows how a visual, interactive, dynamic multiple objective linear programming decision support system can effectively be used for analyzing input-output models. We have applied our approach to studying the quantitative effects of economic or political crises to the Finnish economy. Examples of such crises are nuclear power plant accidents, trade embargoes, and international conflicts. An input-output model of the Finnish economy with 17 industries (sectors) is employed. Our system has been implemented on a microcomputer and is being used by the National Board of Economic Defense. Several typical case situations are discussed.

"A Comment on Tobias Kronenberg's "Construction of Regional Input-Output Tables Using Nonsurvey Methods: The Role of Cross-Hauling"

2012

This article examines the effectiveness of a new non-survey regionalization method: Kronenberg’s Cross-Hauling Adjusted Regionalization Method (CHARM). This aims to take into account the fact that regions typically both import and export most commodities. Data for Uusimaa, Finland’s largest region, are employed to carry out a detailed empirical test of CHARM. This test gives very encouraging results. CHARM is suitable for studying environmental questions, but it can only be applied in situations where foreign imports have been included in the national input–output table. Where the focus is on regional output and employment, location quotients (LQs) can be used for purposes of regionalizati…

An analysis of the scientific productivity and visibility of publications on usability (1971-2005)

2009

Aims: To analyse usability-related articles published in the period 1971-2005 from a bibliometric point of view. Methods: A search for articles was made in the CSIC databases, the Social Science Citation Index, Science Citation Index, PsycInfo, MEDLINE and Inspec databases, using ad hoc search strategies designed for each. Contribution, specific contribution and overlap indices were calculated, as were the indicators of change in scientific production, the productivity of institutions and journals, and the distribution of journals by area of knowledge. Results: An exponential increase in the number of published articles was recorded, with the highest increase seen over the last five years. …

Institutions and Deontic Powers: Some Comments on the Tuomela-Searle Debate

In this talk I will analyze Tuomela’s theory of institutions and the most recent debate with Searle over the issue of whether institutions conceptually involve the creation and distribution of deontic powers. By way of analyzing Tuomela and Searle’s reciprocal criticisms, I conclude that Tuomela does not give us sufficient reasons to give up Searle’s thesis that institutions always involve deontic powers, but I also argue that it is necessary to go beyond Searle’s recent speech act-centered explanation of human sociality. More specifically, moving along the lines of Di Lorenzo’s view of constitutive rules as built into the logical and pragmatic structure of human activities, and making use …

Uncertainty Assessment of a Water-Quality Model for Ephemeral Rivers Using GLUE Analysis

2011

Every model is, by definition, a simplification of the system under investigation. Although it would be desirable to reduce the gap between the simulated and the observed behaviors of the system to zero, this reduction is generally impossible owing to the unavoidable uncertainties inherent in any modeling procedure. Uncertainty analyses can provide useful insights into the best model approach to be used for obtaining results with a high level of significance and reliability. The evaluation of parameter uncertainties is necessary for calibration and for estimating the impact of these uncertainties on model performance. In this context, the uncertainty of a river water-quality model developed…

Assessment of data availability influence on integrated urban drainage modelling uncertainty

2009

In urban water quality management, several models are connected and integrated for analysing the fate of pollutants from the sources in the urban catchment to the final recipient; classical problems connected with the selection and calibration of parameters are amplified by the complexity of the modelling approach increasing their uncertainty. The present paper aims at studying the influence of reductions in available data on the modelling response uncertainty with respect to the different integrated modelling outputs (both considering quantity and quality variables). At this scope, a parsimonious integrated home-made model has been used allowing for analysing the combinative effect of data…

Operational Intelligence and School Problems Measured by Piagetian Tasks and Rhode Island Pupil Identification Scale

1998

To explore the relations between operational intelligence rated on several Piagetian tasks and school learning problems identified by the Rhode Island Pupil Identification Scale by Novack, Bonaventura, and Merenda we assumed that Piagetian performances would allow predicting learning problems of first graders. 38 pupils were evaluated by three teachers, who were asked to complete the Rhode Island scale. Then the same children were individually given 8 Piagetian tests (including conservation and logical tasks) by an examiner who had no information about the pupils' other scores. Analysis showed that successful Piagetian performances were associated with ratings of successful schoolwork Anal…