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Abstrakt

Climate change has been affecting plants over the last century and caused changes in life history features such as the flowering time. Herbarium specimens provide a snapshot of the past environmental conditions during their collection. The collection date in a herbarium specimen is a good proxy to determine the flowering period (phenology). In this study, phenological data from subarctic plant specimens collected over 100 years were gathered by using one of the largest herbarium databases in the World. The collection dates of 7146 herbarium specimens were analyzed and significant shifts in the phenology of subarctic plants were detected. In this study, most of the analyzed 142 species in a subarctic biogeographic region tended to flower earlier in the 1950–2018 period compared to the 1900–1949 as a possible result of the climate change. Flowering time shifted from 8 to 26 days in some species. Changes in flowering time may alter species interactions, community composition, and species distribution in a region. Therefore, results of this study may shed light on the possible shifts in phenology and plant responses under the climate change.
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The present contribution focuses on one specifi c fi gurative usage of proper nouns, namely paragon names, currently employed as derogatory or scornful terms in the debate about public affairs in Poland, as exemplifi ed by the sentence Dlatego Kaczyńscy-PL i Trumpy-PL wygrywają wybory1 [That is why Kaczyńskis and Trumps win elections]. The article argues that metonymic approaches advocated by cognitive linguists (Lakoff 1987, Kövecses and Radden 1998, Barcelona 2003, 2004, Brdar and Brdar-Szabó 2007, and Bierwiaczonek (2013, in press) proffer a more felicitous and precise explanation of the motivational processes behind paragonic uses of names than the metaphoric model advanced in Polish onomastic research, represented, among others, by Kosyl (1978), Kaleta (1998), Cieślikowa (2006) and Rutkowski (2007a, 2007b, 2008, 2012, 2017). We provide a detailed discussion of the recent cognitive linguistic literature on paragons, followed by an analysis of two Polish examples of paragonic uses, which serve as illustration of the explanatory power of selected metonymic frameworks presented in the paper.
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The object of analysis in the paper is semantic extension of a lexical unit. In order to approach it, the author chooses one of the cognitive linguistics theories – Cognitive Grammar (Langacker 1987; 1990; 2000a; 2000b; 2008, etc.). Two of the issues of semantic extension are emphasised. First, it is the grounding of semantic extension in the encyclopaedic knowledge shared by the interlocutors and second, the emergence of the schema implied by the relation of extension. The paper begins with an outline of the postulates of Cognitive Grammar, which are subsequently applied to an analysis of the French lexical unit corps [body], whose extended senses are found in the domain of the structure of musical instruments. In the conclusion the author discusses the dimensions of complexity of the process of semantic extension, one of which is a chain of relations based on metonymy and metaphor.
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The aim of the paper is to explore metaphorical expressions used in informal Polish in the area of computers and the Internet. The study is based on a corpus, compiled and analyzed by the present author; the corpus consists of short informal texts (entries) taken from Polish Internet message boards devoted to computers and the Internet. Altogether, the corpus comprises around 1,500,000 words. The metaphors found in the corpus will be discussed within the cognitive framework. Special attention will be devoted to one of the most frequent conceptual metaphors found in the corpus, namely COMPUTERS ARE HUMANS, or, to be more precise, BADLY WORKING COMPUTER IS A SICK PERSON. Some place will also be devoted to the infl uence of English on metaphorical expressions (in the domain of computers and the Internet) in Polish.
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Abstrakt

The paper aims to discuss the specific characteristics of Italian employment contract from a linguistic point of view as well as from the point of view of the translation. First of all, the employment contract as a legal document will be discussed in regard to the text classifi cation proposed by Sabatini (1990). Moreover, the general typology of Italian and Polish employment contracts will be taken into consideration. The analysis is complemented by Polish equivalents of the main Italian terms and phrases used usually in the employment contact. The fi nal comments will be dedicated to the issue of translation procedures used for dealing with the translation shifts proposed by Vinay and Darbelnet (1958) and Cosmai (2007).
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The aim of the paper is to investigate to what degree the linguistic means used to emphasize a certain element in the text are received by German native speakers. The research is based on a purpose designed questionnaire consisting of two excerpts taken from parliamentary speeches in Bundestag. The questionnaire was administered to 55 German philology students at the University of Leipzig. The students’ task was to read the excerpts carefully and then to decide which elements in the text were emphasized by its author. The fi ndings of the study indicate how different means of textual emphasis (syntactic, lexical and rhetorical ones) are recognized by the students.
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Adopting the standpoint of Construction Grammar (Goldberg 2006) and the corpus- based method known as Distinctive-Collexeme Analysis (Gries and Stefanowitsch 2004; Hilpert 2014), the investigation seeks to identify lexemes that indicate a strong preference either for the it is ADJ to V-construction or the it is ADJ that-construction. On the basis of data extracted from the academic sub-corpus of COCA, the study reveals that there are adjectives exhibiting a strong preference for one construction instead of the other, and that the constructions have a tendency to occur with adjectives evoking different semantic frames.
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The paper discusses the primary and secondary endings of the Indo-European middle. It is suggested that, rather than being a local (Italo-Celtic) innovation, the r-endings of the middle voice represent a Proto-Indo-European archaism. Numerous middle forms containing the element -r- are found not only in the Tocharian languages, but also in most of the Anatolian languages attested in the second millennium BC (including Hittite, Palaic, Cuneiform Luvian and Hieroglyphic Luvian). Other Indo- European languages (including Greek and Indo-Iranian) display a zero marker, whereas the oldest Hittite texts attest the primitive feature -t-. The Old Hittite middle marker *-ti, it is claimed, was more archaic than its late variants *-ri as well as *-i. The original primary middle endings in non-Anatolian Indo-European should be reconstructed as follows: 1 sg. pres. *-mh2eŘi, 2 sg. *-sh2eŘi, 3 sg. *-toŘi, 1 pl. pres. *-mesdhh2oŘi, 2 pl. *-sdh(u)u̯ eŘi, 3 pl. *-ntoŘi for transitive verbs and 1 sg. *-h2e/oŘi, 2 sg. *-th2eŘi, 3 sg. *-oŘi, 1 pl. *-medhh2oŘi, 2 pl. *-dh(u)u̯ eŘi, 3 pl. *-roŘi for intransitive verbs. The Indo-European phoneme *Ř seems to be a refl ex of a Proto-Indo-European (i.e. Indo-Hittite) dental stop *Ď, probably identical with the Indo-European dental spirant *đ.
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The aim of this paper is to conduct a diachronic analysis of the Polish word rżysko ‘stubble’, whose root retains the primary designation of rye, namely reż ‘rye, obs.’. Although this noun was ousted by żyto ‘rye’, a derivative of the verb żyć ‘to live’, its cognates are still used in many Slavic and Germanic languages, e.g. Russian rožь (рожь) ‘rye’, and English rye. The paper presents other cognates with a view to contrasting the English word rye with its obsolete Polish cognate reż and understanding the evolution of both words. For this purpose, the study seeks to identify the sound changes responsible for the discrepancy between the Polish-English cognates which developed from *rughi-. The derivative rżysko ‘stubble’ has been analysed in the context of other nomina loci as well as the semantic change which affected the word. It is suggested that the phenomenon exemplifi ed by rżysko can be referred to as a root archaism.
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The title of the paper harks back to Schopenhauerian ‘der Positivitȁt des Schmerzens’, a formulation which, stripped of its broader philosophical context, reads to most of us paradoxical if not overtly contradictory. The folk (non-medical) perception of pain may be evaluatively negative, but there are also pain conceptualizations which reveal that humans infrequently think about this phenomenon along more positive lines. Thus, being predominantly construed as an ‘evil-doer’, pain does not preclude more positive construals, both in medical and non-medical fi elds. ‘Positivity of pain’, then, is often explored within literary, anthropological, psychological, theological, social, therapeutic and utilitarian realms, and, as Sussex puts it, “in its interdisciplinary span, pain language is a prototypical example of a problem of applied linguistics” (2009: 4). With this in mind, I take a closer look at some verbal as well as verbo-pictorial manifestations of pain. The focus of the present study is specifi cally on the overarching metaphor +PAIN as ‘GOOD-DOER’+ (naturally contrasted with the previously hinted +PAIN as ‘EVIL-DOER’+), further broken into more specifi c sub-metaphors. An attempt at capturing and describing some of these apparently counter-intuitive pain metaphorizations reveals their ‘positive potential’, a potential of tools with which to obtain control over pain and, in many cases, re-forge it into something ‘better’, something evaluatively positive.
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Proposed is the analysis of steam condensation in the presence of inert gases in a power plant condenser. The presence of inert, noncondensable gases in a condenser is highly undesirable due to its negative effect on the efficiency of the entire cycle. In general, thermodynamics has not provided an explicit criterion for assessing the irreversible heat transfer process. The method presented here enables to evaluate precisely processes occurring in power plant condensers. This real process is of particular interest as it involves a number of thermal layers through which heat transfer is observed. The analysis was performed using a simple, known in the literature and well verified Berman’s model of steam condensation in the presence of non-condensable gases. Adapted to the geometry of the condenser, the model enables, for instance, to recognise places where non-condensable gases are concentrated. By describing with sufficient precision thermodynamic processes taking place in the vicinity of the heat transfer area segment, it is possible to determine the distributions of thermodynamic parameters on the boundaries between successive layers. The obtained results allow for the recognition of processes which contribute in varying degrees to irreversible energy degradation during steam condensation in various parts of the examined device.
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Heat and mass transfer stretched flow of an incompressible, electrically conducting Jeffrey fluid has been studied numerically. Nanoparticles are suspended in the base fluid and it has many applications such as cooling of engines, thermal absorption systems, lubricants fuel cell, nanodrug delivery system and so on. Temperature dependent variable thermal conductivity with Rosseland approximation is taken into account and suction effect is employed in the boundary conditions. The governing partial differential equations are first transformed into set of ordinary differential equations using selected similarity transformations, which are then solved numerically using Runge-Kutta-Felhberg fourth-fifth order method along with shooting technique. The flow, heat and mass transfer characteristics with local Nusselt number for various physical parameters are presented graphically and a detailed discussion regarding the effect of flow parameters on velocity and temperature profiles are provided. It is found that, increase of variable thermal conductivity, radiation, Brownian motion and thermophoresis parameter increases the rate of heat transfer. Local Nusselt number has been computed for various parameters and it is observed that, in the presence of variable thermal conductivity and Rosseland approximation, heat transfer characteristics are higher as compared to the constant thermal conductivity and linear thermal radiation.
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Słowa kluczowe ORC Sludge biogas gas turbine

Abstrakt

The present paper describes a cycle, which may be applied in sewage treatment plants as a system to convert biological waste into process heat and electricity. In sludge stabilization processes anaerobic fermentation acts as the source of methane, which can be used then to generate heat and electric current in gas turbines. Products of high-temperature oxidation can be utilized in organic Rankine cycles to generate electric power. Waste heat is used for heating the fermenting biomass. Energy balance equations mentioned in the thesis: organic Rankine cycle, regenerative gas turbine engine, anaerobic sludge stabilization system.
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Experimental investigation of natural convection heat transfer in heated vertical tubes dissipating heat from the internal surface is presented. The test section is electrically heated and constant wall heat flux is maintained both circumferentially and axially. Four different test sections are taken having 45 mm internal diameter and 3.8 mm thickness. The length of the test sections are 450 mm, 550 mm, 700 mm and 850 mm. Ratios of length to diameter of the test sections are taken as 10, 12.22, 15.56, and 18.89. Wall heat fluxes are maintained at 250–3341 W/m2. Experiments are also conducted on channels with internal rings of rectangular section placed at various distances. Thickness of the rings are taken as 4 mm, 6 mm, and 8 mm. The step size of the rings varies from 75 mm to 283.3 mm. The nondimensional ring spacing, expressed as the ratios of step size to diameter, are taken from 1.67 to 6.29 and the non-dimensional ring thickness, expressed as the ratios of ring thickness to diameter are taken from 0.089 to 0.178. The ratios of ring spacing to its thickness are taken as 9.375 to 70.82. The effects of various parameters such as length to diameter ratio, wall heat flux, ring thickness and ring spacing on local steady-state heat transfer behavior are observed. From the experimental data a correlation is developed for average Nusselt number and modified Rayleigh number. Another correlation is also developed for modified Rayleigh number and modified Reynolds number. These correlations can predict the data accurately within ±10% error.
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The thermodynamic properties, which are the important bulk properties for solids, have been investigated for ZrB2 under pressure through the quasi harmonic Debye model. The dependences of thermal expansion, Gruneisen parameter, Debye temperature and specific heat on pressure P are successfully obtained. The obtained results are in a good agreement with the available experimental and other theoretical data.
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The paper describes a fuel cell based system and its performance. The system is based on two fuel cell units, DC/DC converter, DC/AC inverter, microprocessor control unit, load unit, bottled hydrogen supply system and a set of measurement instruments. In the study presented in the paper a dynamic response of the proton exchange membrane (PEM) fuel cell system to unit step change load as well as to periodical load changing cycles in the form of semi-sinusoidal and trapezoidal signals was investigated. The load was provided with the aid of an in-house-developed electronic load unit, which was fully PC controlled. The apparatus was commissioned by testing the steady-state operation of the module. The obtained efficiency of the fuel cell shows that the test apparatus used in the study provides data in substantial agreement with the manufacturer’s data.
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The production of thermal energy from solar energy by flat collectors finds nowadays many applications due to their innumerable economic and environmental interests. Currently, conservation of energy resources has become a global priority. On the other hand, given the dizzying demand for energy, has led specialists to find new techniques, such as renewable energies (solar, wind and geothermal). The present work is a contribution, by numerical simulation, to the study of heat transfer in flat solar collectors. On the basis of some experimental data, several simulation calculations have been carried out in order to determine the influencing parameters allowing better performance of the sensors and ensuring a good homogeneity of the temperature distributions. Based on the observation that, due to the low thermophysical properties of the air used as heat transfer fluid, solar air collectors rather give poor yields. It has been found very useful to have ‘baffling’ obstacles of various shapes and forms in the solar collector duct. This increases the thermal transfer of a coolant, which clearly improves the thermal efficiency of the solar air collector. This article consists mainly of studying the effects on heat transfer of turbulent forced convection by baffles of zigzag shapes, placed in a rectangular channel, using the finite volume method. The pressure-velocity coupling has been processed by the SIMPLEC algorithm. The results are presented in terms of the average Nusselt number and temperature field for different positions.
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The study was aimed at analyzing patterns of abundance and diversity of macrozoobenthic communities along a depth gradient in the Admiralty Bay, a semi-enclosed basin located in a rapidly changing region of the western Antarctic Peninsula. The study concerns primarily the Polychaeta and Amphipoda, the taxonomic richness and diversity of both groups being analyzed at different taxonomic levels (species, genus and family). Such an analysis, which uses a basic surrogacy measure (low taxonomic resolution) can be very useful in future monitoring programs of the Admiralty Bay. The analysis was based on 35 samples collected in the summer seasons of 1984/85 and 1985/86, with a Tvärminne sampler (within the 7–30 m depth range) and an 0.1 m2 van Veen grab (deeper areas) along a transect with the depth changing from 7 to 502 m. The total macrozoobenthos abundance was found to decrease with depth, from 1581 ± 730 ind./0.1 m2 within the 7–30 m to as few as 384 ± 145 ind./0.1 m2 at 400–500 m. The number of phyla per sample was observed to increase along the depth gradient of 7–30 to 200–300 m but was substantially reduced in the deepest sublittoral (400–500 m). The results showed large differences between amphipods and polychaetes in their respective depth-related biodiversity changes. On the other hand, the diversity metrics used (Pielou’s evenness, Shannon-Wiener index, number of species per sample, number of genera per sample, number of families per sample) at different taxonomic levels within each group produced similar patterns, demonstrating the usefulness of surrogacy in studies of Antarctic fjords.
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Abstrakt

Different chromosomal forms of Deschampsia antarctica Desv. (Poaceae), including diploids (2n=26), hypotriploid (2n=36–38) and a genotype with an occasional occurrence of B chromosome (2n=26+0-1B) that originated from southern marginal populations (Argentine Islands region, maritime Antarctic) were studied using molecular cytogenetic, morphometric and biochemical methods. FISH analysis revealed variations in the number of rDNA sites between the diploid and hypotriploid plants. The genome size varied among plants with a different chromosome number and was on average 10.88 pg/2C for diploids and 16.46 pg/2C for hypotriploid. The mean values of leaf length of plants grown in vitro varied within a range of 5.23–9.56 cm. The total phenolic content ranged from 51.10 to 105.40 mg/g, and the total flavonoid content ranged from 1.22 to 4.67 mg/g. The amount of phenolic compounds did not differ significantly between the genotypes, while a variation in the flavonoid content was observed for L59 and DAR12. The diploids did not differ significantly among each other in terms of the number of rDNA loci, but differed slightly in their genome size. The individuals of DAR12 carrying B chromosome were similar to other diploids in terms of their genome size, but statistically differed in leaf length. The hypotriploid had both a greater number of rDNA sites and a larger genome size. No statistical correlations were observed between the genome size and leaf length or genome size and accumulation of phenolic and flavonoid compounds. The results of this study suggest that D. antarctica plants from the southern edge of the range are characterised by the heterogeneity of the studied parameters.
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