GLOBAL GEOPOTENTIAL MODELS IN THE REGION OF HUNGARY

The ability of some currently used high order geopotential models - OSU81, GPM2, IFE87E1 and 88E, OSU86E and 86F, OSU89A and OSU89B - to recover the gravity anomaly field in Hungary has been tested. There were three ways used to compare the geopotential coefficient solutions. One of the tests is based on using the point gravity data published by RENNER and SZILÁRD (1959). A comparison of quasigeoid undulations computed from the potential coefficients with undulations derived from Doppler stations positions has been performed. A detailed comparison of several geopotential solutions in terms of differences in gravity anomalies and quasigeoid undulations in the region of Hungary is also presented. The results have shown that OSU89B model is the most suitable one for use as a reference in the region of Hungary. This model is able to recover gravity anomalies over 54 % of the area of Hungary within 5 mgal and over 81 % of the country with 10 mgal. However, large systematic discrepancies have been observed between different geopotential solutions in the eastern part of Hungary as well as in the eastern and southern Neighbourhood of Hungary due to the lack of real surface gravity data from Romania, and from both the former countries of the Soviet Union and Yugoslavia, etc. in geopotential coefficients computations

Bernhard Heck and Hungary

A personal welcome greetings of the Budapest University of Technology and Economics (BME) and the Earth Sciences Section of the Hungarian Academy of Sciences (HAS) in a commemorative publication book compiled on the occasion of the retirement of Professor Dr.-Ing. habil. Dr. h.c. Bernhard Heck

Mindreading in a dog: an adaptation of a primate ‘mental attribution’ study

In the framework of a longitudinal case study on a male tervueren dog, Philip, the present paper was aimed to get a more sophisticated insight into the cognitive functioning of the dog's mind. Our experiment was designed to study the dog's ability to recognize knowledge or ignorance in others. The procedure used here was identical to that used in an ape-study (Gómez & Teixidor, 1992) and therefore provides the possibility for direct dog-ape comparison regarding their performance. Results show that similarly to the case with this “enculturated” orangutan, after few trials Philip was able to adjust his communicative behaviour to the state of knowledge of his human partner and cooperated successfully in the problem solving task (getting the ball). The exact mechanism underlying this communicative behaviour is still not clear, and both low- and high-level explanations are considered. We suggest that this approach gives a new possibility to conduct comparative studies aimed to understand the evolution of social cognition

What are you or who are you? The emergence of social interaction between dog and Unidentified Moving Object (UMO)

Robots offer new possibilities for investigating animal social behaviour. This method enhances controllability and reproducibility of experimental techniques, and it allows also the experimental separation of the effects of bodily appearance (embodiment) and behaviour. In the present study we examined dogs’ interactive behaviour in a problem solving task (in which the dog has no access to the food) with three different social partners, two of which were robots and the third a human behaving in a robot-like manner. The Mechanical UMO (Unidentified Moving Object) and the Mechanical Human differed only in their embodiment, but showed similar behaviour toward the dog. In contrast, the Social UMO was interactive, showed contingent responsiveness and goal-directed behaviour and moved along varied routes. The dogs showed shorter looking and touching duration, but increased gaze alternation toward the Mechanical Human than to the Mechanical UMO. This suggests that dogs’ interactive behaviour may have been affected by previous experience with typical humans. We found that dogs also looked longer and showed more gaze alternations between the food and the Social UMO compared to the Mechanical UMO. These results suggest that dogs form expectations about an unfamiliar moving object within a short period of time and they recognise some social aspects of UMOs’ behaviour. This is the first evidence that interactive behaviour of a robot is important for evoking dogs’ social responsiveness

Design and implementation of a radio controlled led lighting system

Technological advances allow us to control LED (Light Emitting Diode) lighting at home, in the office it can even allow us to change the intensity of the light and this is just the beginning of what the future holds for us. In this study an LED internal lighting fixture of our own design will be presented focusing on each step in its design. Firstly, the features, types and history of LEDs will be presented, next the products available in market that are required for the completion of the device. Finally, the design and implementation as well as the radio frequency controlled LED indoor lighting fixture will be shown

Biomassza kazánok tüzelőanyagellátásának logisztikai folyamatai

Tanulmányunk biomasszával működő gőzkazán-rendszer tüzelőanyagának logisztikájáról, annak gyűjtéséről, szállításáról és kezeléséről szól. Bemutatja a szalmabála-kezelési rendszerek lehetséges működését, ideértve a bálák mennyiségének és minőségének ellenőrzését, nyomonkövetési eljárásait, a bálák manipulálását, kezelését, mozgatását a keletkezési helytől, a szállító járműveken át a raktárokig, sőt az üzemanyag-előkészítő rendszerig, a szükséges tárolási kapacitások és a szükséges járműforgalom szempontjaiból. Abstract: Our study is about the logistics and handling of fuel for a biomass fuelled steam boiler system. It shows possible solutions for straw bale handling systems including quantity, quality control and overtake procedure of the bales, through manipulation of the bales from the delivery vehicles to storage and from storage to the fuel preparation system of the boilers, to the required storage capacities and vehicle traffic

Design and Implementation of a radio controlled led lighting system

Technological advances allow us to control LED (Light Emitting Diode) lighting at home, in the office it can even allow us to change the intensity of the light and this is just the beginning of what the future holds for us. In this study an LED internal lighting fixture of our own design will be presented focusing on each step in its design. Firstly, the features, types and history of LEDs will be presented, next the products available in market that are required for the completion of the device. Finally, the design and implementation as well as the radio frequency controlled LED indoor lighting fixture will be shown