Aesthetic functions of greenery in urban public space are examined using examples of cities in Slovakia, focusing on periods of changes of aesthetic principles. Greenery, tree alleys and public parks notably enter urban public space in the 19th century, with application of contemporary aesthetic principles. During the 20th century, bio-ecological values of vegetation rather than aesthetic functions move to the centre of interest. Today, lack of maintenance and conceptual planning are often reflected in poor aesthetic appeal of greenery.
Marine engineer Willard Stewart filed suit against the Dutra Construction Company in the US District Court of Massachusetts, USA. He was suing for compensation for a work-related accident. Stewart based his claim on the Jones Act and the principles of maritime law. Responsibility is based on the principle of risk in the Jones Act and applies to seamen employed on vessels. In order to obtain compensation, Stewart had to prove that the dredge on which the accident occurred was a vessel. I f proved, he would be regarded as a seaman since he worked on it. The district court declared that a dredge was not a vessel. Stewart appealed and the appellate court upheld the first verdict. Stewart fs case was appealed to the Supreme Court in order to define the idea of vessel* in the Jones Act and to decide if a dredge can be regarded as a vessel. The Supreme Court has yet to hand down a verdict. The author believes that the Jones Act should be interpreted narrowly and should not be applicable to all workers at sea, even those who work on immobile platforms in ports. The concept of 'vessel' in the Jones Act must be interpreted in a narrow sense.
Main energy conversion machinery used and to be used in cogeneration systems are schematically described. Some assets of the distributed generation are pointed out and small-scale cogeneration systems designed for energy units of distributed cogeneration are described.
In the small scale, turbines and bearings are a source of specific problems connected with securing stable rotor operation. Accepted has been two kinds of high speed micro-turbines of electric power about 3 KW with multistage axial and radial rotors supported on foil bearings. A concept which becomes more and more attractive takes into account a low-boiling agent, which is normally used in the thermal cycle of the micro-turbine, as the lubricating liquid in the bearings (so-called ORC based systems). Of some importance is the operation of these machines at a low noise emission level, sine being parts of the household equipment they could disturb the calm of the residents. The scope of the present article is limited to the discussion of dynamic characteristics of the selected design. The properties of the rotor combined with slide bearings (foil bearings in this particular case) were taken under investigation. A combination of this type is a certain novelty since a typical modal analysis of such objects refers to a rotor itself. Analysing the dynamic state of the "home" power plants requires qualitatively novel research tools.
The motto of Zofia Nałkowska’s short-story collection Medaliony [Medalions] – “People doomed people to this fate” [Polish, “Ludzie ludziom zgotowali ten los”] – as obvious as it may apparently seem, has aroused various controversies. Henryk Grynberg believed that the only right formula, the one that would do justice to those persecuted, would have been “People doomed Jews to this fate”. Recently, the discussion was resumed in a book on the portrayal of the Holocaust in Medaliony – Zagłada w „Medalionach” Zofii Nałkowskiej, edited by Tomasz Żukowski: one of its essays (by Żukowski and Aránzazu Calderón Puerta) notices that endeavours to universalise the Holocaust is at least premature for the Poles tending to avoid facing the truth about their own contribution to annihilation of the Jews. While the threads addressed in these debates are important, they disregard the beliefs and the system of values Nałkowska adhered to. The Polish novelist adopted the view that man and the pleasure he takes in inflicting pain is the actual cause of evil. This inclination revealed itself not only during the war. This more general observation was rooted in her knowledge of life, relations between people, and daily cruelty. Supported by an ideology and furnished with technical resources, the war added a historical dimension to this bent. Moreover, Nałkowska was definitely not one among those who stayed silent in respect of the Jewish victims. Conversely, a few of the stories in Medaliony speak exactly about this problem, never trying to conceal anti-Semitic attitudes among Poles.
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