To evaluate the relationship between total organic carbon (TOC) and Rock-Eval S2 (petroleum potential) of petroleum source rocks, atotal of 180 outcrop samples from the black organic matter–rich facies of Mesozoic strata from a locality of southwest of Iran wereinvestigated using Rock-Eval VI pyrolysis and Leco Carbon Analyzer. The linear regression is applied to determine the correlationbetwee...

to evaluate the relationship between total organic carbon (toc) and rock-eval s2 (petroleum potential) of petroleum source rocks, atotal of 180 outcrop samples from the black organic matter–rich facies of mesozoic strata from a locality of southwest of iran wereinvestigated using rock-eval vi pyrolysis and leco carbon analyzer. the linear regression is applied to determine the correlationbetwee...

Low-field nuclear magnetic resonance (LF-NMR) relaxometry is a non-invasive technique commonly used to assess hydrogen-bearing fluids in petroleum reservoir rocks. Longitudinal T1 and transverse T2 relaxation time measurements made using LF-NMR on conventional reservoir systems provides information on rock porosity, pore size distributions, and fluid types and saturations in some cases. Recent ...

In this paper we present LeCo-EAD a Learning Companion System for distance education in computer science. LeCo-EAD includes multiple virtual learning companions that have different behaviours and are always available to interact with distant students. We show how a web-based distance course that adapts both its navigation support (links) and strategy (type of learning companion) to the student,...

Screen-printed metal-semiconductor contacts as the mainstream-metallization of industrially produced silicon solar cells are currently a major topic in research, they still show high potential for cell efficiency improvement. The Laser Enhanced Contact Optimization (LECO) process developed by CE Cell Engineering GmbH enables generation new contact structure that is capable generating low ohmic ...

We performed neutron powder diffraction measurements on the as-sintered (AS) and oxygen-reduced (OR) La1.8Eu0.2CuO4+??? (LECO). The structural parameters for oxygens in AS OR samples refined by Rietveld analysis are almost identical to those of reference system, Pr2CuO4+???. Thus, two systems comparable terms changes due annealing, although superconductivity appears only LECO.

A technique to improve contacts of solar cells laser enhanced contact optimization (LECO) has been studied in terms micro scale formation at industrial PERC cells. High-resolution diagnostics by focused ion beam techniques and scanning electron transmission microscopy indicate the LECO-induced microscopic buried interface between screen-printed silver finger silicon wafer. large quantity these ...

Soil sequesters large amounts of carbon derived from organic and inorganic sources. Soil organic carbon (SOC) has to be measured periodically for the study of climate change. Many methods are used to estimate SOC and those methods are relatively time consuming and costly, with carbon in soil samples converted to carbon dioxide which is then measured directly or indirectly by different methods. ...

This article presents a successful laser-powered co-firing process for highly efficient Si solar cells as more compact and energy-efficient alternative to the conventional firing in an infrared (IR) lamp-powered heat chamber. The best cell group reaches with laser only 0.1%abs lower efficiency compared firing, demonstrating industrial potential of this technology. Adding enhanced contact optimi...