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Automatic Enhancement of the Reference Set for Multi-Criteria Sorting in The Frame of Theseus Method

Fernandez E., Navarro J., Salomon E.

Foundations of Computing and Decision Sciences

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2014

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Vol. 39, No. 2

57--77

EN

Some recent works have established the importance of handling abundant reference information in multi-criteria sorting problems. More valid information allows a better characterization of the agent’s assignment policy, which can lead to an improved decision support. However, sometimes information for enhancing the reference set may be not available, or may be too expensive. This paper explores an automatic mode of enhancing the reference set in the framework of the THESEUS multi-criteria sorting method. Some performance measures are defined in order to test results of the enhancement. Several theoretical arguments and practical experiments are provided here, supporting a basic advantage of the automatic enhancement: a reduction of the vagueness measure that improves the THESEUS accuracy, without additional efforts from the decision agent. The experiments suggest that the errors coming from inadequate automatic assignments can be kept at a manageable level.

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Optical dating of alluvial deposits at the orogenic front of the Andean Precordillera (Mendoza, Argentina)

Schmidt S., Tsukamoto S., Salomon E., Frechen M., Hetzel R.

Geochronometria

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2012

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Vol. 39, no. 1

62-75

EN

Well constrained numerical ages of alluvial fan sediments are key to understanding the chronology of alluvial episodes and tectonic activity at the front of the Andean Precordillera. We tested the application of radiocarbon and optically stimulated luminescence (OSL) dating in the distal part of an alluvial fan five kilometers north of Mendoza. For OSL dating a large number of aliquots (n > 70) – each composed of ~50 quartz grains – were measured in order to obtain reliable burial ages despite scattered dose distributions. Owing to a feldspar contamination in all samples, an infrared stimulation was inserted before each OSL measurement, which reduced the feldspar OSL signal suc-cessfully. By using the minimum age model we obtained stratigraphically consistent burial ages of alluvial deposits in a depth profile. The uppermost ~1 m of sediment is composed of debris flow deposits buried 770š76 years ago. Three plant remnants used for radiocarbon dating from the same layer, however, yielded ages younger than 350 years, which are interpreted to underestimate the depositional age. Underneath the debris flow, a major unconformity cuts a series of distal alluvial fan sediments with interstratified floodplain deposits, which are composed of sandy and calcite-rich silt layers, respectively. Three samples from this unit which were distributed over one meter of sediment thickness yielded statistically concordant OSL ages of 12.3š1.2 ka, 12.3š1.2 ka, and 11.7š1.1 ka. The deposi-tion of these sediments during the latest Pleistocene coincides with a phase of cool and humid climate, which occurred before the alluvial fan propagated farther into the foreland. The overlying debris flow sediments are associated with alluvial fan incision during the arid Late Holocene.

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Określenie wydatku energetycznego dla typowych stanowisk przodkowych w kopalniach rud miedzi

Nowysz M., Salomon E.

Cuprum : czasopismo naukowo-techniczne górnictwa rud

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1998

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nr 9

205-220

PL

W niniejszym artykule przedstawiono wyniki badań ilości ciepła metabolizmu wytwarzanego przez górników zatrudnionych na przodkowych stanowiskach pracy, a więc w rejonach o szczególnie trudnych warunkach klimatycznych.

EN

Results of the measurements of metabolism heat amount produced by miners working on the face workplaces i.e. in the areas with extreme climatic conditions are presented in the paper.