Metal-rich (CB, CH, Isheyevo) carbonaceous chondrites are characterized by the highest whole-rock enrichments in 15 N (δ 15 N up to +1500‰) and nearly complete absence of interchondrule fine-grained matrix [e.g., 1]. The fine-grained material occurs mainly as chondritic clasts, which experienced low-temperature aqueous alteration on their initial parent body(ies) and were subsequently accreted ...

Copyright and Moral Rights for the articles on this site are retained by the individual authors and/or other copyright owners. For more information on Open Research Online's data policy on reuse of materials please consult the policies page. Introduction: NWA 4477 is a highly brecciated type L3-7 chondrite. It therefore offers a unique insight into the history of the L-chondrite parent body. Of...

Copyright and Moral Rights for the articles on this site are retained by the individual authors and/or other copyright owners. For more information on Open Research Online's data policy on reuse of materials please consult the policies page. Introduction: NWA 4477 is a highly brecciated type L3-7 chondrite. It therefore offers a unique insight into the history of the L-chondrite parent body. Of...

Holocene valley fill material in old stream beds are generally composed of weathering material from the hills. The grain size can vary from gravel to clay. The spatial distribution of the valley fill material can be simulated by using the Markov chain approach. The transition probabilities of this approach indicate the chance that one type of sediment is changing into another sediment type. The...

The present study shows results of friction stir welded (FSW) samples after different plastic deformation routes. welds were made coarse-grained and ultrafine-grained commercially pure aluminium. As a method new hybrid process has been chosen, which resulted in obtaining with characteristics microstructure, also differed dependance the examined plane. Microstructure observations showed that, re...

Abstract The study of raw materials is an essential step in lithic analysis, regardless the age, provenance, and technology assemblages. As many other contexts Paleolithic, researchers Middle Stone Age (MSA) southern Africa have often focused their attention on fine-grained, non-local rock types, such as silcrete. Here, I spotlight considered to be lower suitability for knapping frequently acqu...

dependency parsing is a way of syntactic parsing and a natural language that automatically analyzes the dependency structure of sentences, and the input for each sentence creates a dependency graph. part-of-speech (pos) tagging is a prerequisite for dependency parsing. generally, dependency parsers do the pos tagging task along with dependency parsing in a pipeline mode. unfortunately, in pipel...

In this research, variant selection of martensite transformed from ultrafine-grained (UFG) austenite fabricated by accumulative roll bonding (ARB) process and subsequent annealing was investigated with respect tomorphology of parentaustenitic phase. The results show that the original shape of austenite grain is very effective factor in determiningthe preferred variants of martensite transformed...