In Scandia Cavi on Mars, barchans migrating over a field of transverse aeolian ridges (TARs) leave behind distinctive trails (“wakes”) comprising both TARs undergoing exhumation and coarse-grained ripples being shed from the barchans. With distance upwind barchans, combined pattern these bedforms coarsens defect density decreases, thus appearing to mature with exposure time. We present results ...

Solid oxide fuel cells are a promising alternative to gas engines for combined heat and power production based on biomass gasification. The technical complexity of realizing gasifier – cell couplings has limited the number experiments conducted in past. However, results from such high importance evaluation tar thresholds operating conditions ensuring stable operation cells. For first time, it w...

Nowadays, the most common ways to dispose of acid tars and paper production waste are burial or incineration, but it is ecologically economically expedient use such in building materials. A new variant filler aggregate—wastepaper sludge ash (paper waste) a chemical activator for aggregates—acid tar (oil-refining industry proposed. Elemental mineralogical compositions wastepaper comparison with ...

Chenistry of Carcinogenic Compounds The first of the eighteen articles, which is by Haddow and Kon, on the chemistry of carcinogenic compounds1 begins with Percival Pott (1775) and leads the history of the subject via Yamagiwa to Kennaway's work on synthetic tars (Kennaway, 1924, 1925; Kennaway and Hieger,. 1930) and his discoveryt of the first cancer producing hydrocarbon, I: 2: 5: 6-dibenzant...

At the Galician coast, mussels are cultured on vertical ropes attached to floating rafts, which are cleaned in situ with tars or waterproof paints. The present study analyses the com position and the toxic risk of several compounds used during maintenance, in order to improve mussel-farming practices. The toxic risk was determined in relation to that of benzo(a)pyrene (BaP) by calculating the c...

Autologous rosette-forming cells (Tar cells) have surface and functional characteristics of post-thymic precursors and among these characteristics there are some that have been identified in the responsive cell of the autologous mixed-lymphocyte reaction (AMLR). We therefore did AMLR with circulating mononuclear cells from normal subjects using as responding cells either total T cells, T cells ...

Trust-aware recommender system (TARS) recommends ratings based on user trust. It greatly improves the conventional collaborative filtering by providing reliable recommendations when dealing with the data sparseness problem. One basic research issue of TARS is to improve the recommending efficiency, in which the key point is to find sufficient number of recommenders efficiently for active users....