Nowadays, many known celebrities use social media as a channel to promote positive narratives and support humanitarian work. This article offers an analysis of the argumentative strategies employed in Instagram by a Spanish actor Javier Bardem, an Antarctic ambassador for Greenpeace, in order to attract the attention of the public to the ecological problems of the Antarctic Ocean. I have studied 76 posts published in Instagram during the 2018-2019 period. Starting from the theoretical framework of argumentation, as well as of pragmatic linguistics, I analyze those linguistic mechanisms and discursive strategies that are used with the aim to achieve the persuasive purposes.

The following article deals with the language of emails. Of particular interest with regard to the linguistic features of emails is the fading distinction between the written medium and the oral conception. In order to receive a valid picture of the language of emails it is necessary to distinguish between formal and private emails (content wise). For this purpose, a corpus of selected emails has been compiled to illustrate language change in concrete examples of German emails. In this article examples of that email corpus have been selected to serve as underpinnings for the argumentations in this paper. Special attention is paid to the fading case marking on nouns, emoticons and syntax. With regard to syntax, the position of the lexical verb in subordinate clauses has been analyzed since in oral language it is often observed that even in a subordinate clause where verb-last is to be expected, we encounter verb-second. These are all indices of a more orally conceptualized language in medially written emails.

The paper examines the impact of possible operational factors on strength and frequency parameters generated by bending of fibre-cement panels. The tests were performed on elements cut out of a standard commercially available panel. The samples were exposed to factors described as environmental (soaking in water, bath-drying cycles, freeze-thawing cycles) and unique (flame ignition and high temperature exposure) and then subjected to three-point bending tests. Acoustic emission (AE) signals were acquired during the external load application. After the measurements were completed, the strength of individual elements was determined and the frequencies generated during bending were calculated. The obtained results were analysed statistically. Comparing the results obtained for a group of samples subjected to environmental and unique factors, significant differences between them were noted. It was noted that the decrease in the strength of the samples is related to the emission of lower frequency sounds. It was found that the application of the presented methodology allows to determine the condition of the fibre-cement boards in use.

The United Nations Convention on Contracts for the International Carriage of Goods Wholly or Partially by the Sea (the Rotterdam Rules, signed on 23 September 2009) is intended to make exclusive use of electronic transport documents. Transport documents, as the Author points out, are negotiable.

Drafting of the Convention was set in motion 1996 in the Comite Maritime International (CMI), and from 2002 its development continued under the auspices of the United Nations Commission on International Trade Law (UNCITRAL). The Author opines that the Rules may advance application of electronic negotia-ble instruments in present day trade.

Flow boiling and flow condensation are often regarded as two opposite or symmetrical phenomena. Their description however with a single correlation has yet to be suggested. In the case of flow boiling in minichannels there is mostly encountered the annular flow structure, where the bubble generation is not present. Similar picture holds for the case of inside tube condensation, where annular flow structure predominates. In such case the heat transfer coefficient is primarily dependent on the convective mechanism. In the paper a method developed earlier by the first author is applied to calculations of heat transfer coefficient for inside tube condensation. The method has been verified using experimental data from literature on several fluids in different microchannels and compared to three well established correlations for calculations of heat transfer coefficient in flow condensation. It clearly stems from the results presented here that the flow condensation can be modeled in terms of appropriately devised pressure drop.