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Analecta technica SzegedinensiaVol. 12. No. 2. (2018.)


  • Sándor Nagy :
    The magnetization of dense aggregated dipolar fluids1-12en [1.10 MB - PDF]EPA-02592-00011-0010

    The magnetization for dipolar fluids is studied treated separately at low and high external magnetic field. Canonical ensemble Monte Carlo simulations have been performed in dipolar hard sphere fluid in order to test these theoretical results. New expressions are introduced at low and high external field and ultimately the synthesized formula is given. The main difference in the structure of dipolar liquids at different external field is the average orientation of the formed chains. In case of infinitesimal external magnetic field there is no a well-specified direction, while at high enough external field actually the chains are parallel to this field. The present theory yields good result in the intermediate region as well where the most conspicuous failures are provided by the former theories.

  • Gábor Nagy ,
    Alexandra Takács ,
    András Arnold Kállay ,
    Dóra Mentes :

    One of the possible utilisation methods for organic wastes is anaerobe decomposition (fermentation). The main product of this process is biogas which is usually used for energy purposes due to its composition (mainly methane and carbon dioxide). The residual solid material after fermentation can be used as soil conditioner. Lab-scale fermentation can be carried out using the “VDI 4630 – Fermentation of organic materials Characterisation of the substrate, sampling, collection of material data, fermentation tests” standard. Based on the conditions described in the standard, a small-scale low-budget reactor system were prepared. The temperature during the holding time was controlled with water bath and the gas production was determined with fluid displacement method. A peristaltic pump was used for the recirculation of the gas to mix the base material. Furthermore, the temperatures of the environment, the water baths and the inside of each reactor was automatically registered on a data collector. Based on the gathered data, the system is applicable for biogas production from sheep manure. The produced biogas quantities were between 0.01-0.15 m3/kg TS and the methane content was 24-63 vol% during the experiment at various temperatures, using different inoculants.

  • Bence Rafael ,
    Nóra Kuruczleki ,
    József Gál :

    The modern pharmaceutical industry is a strictly controlled area. Both national and international rules apply, but none of these deals with logistical issues arising from the manufacture of the product. Following the path of a drug, it is possible to get acquainted with the problems that arise and their solution. The drug is much more than a common product. The drug is a product of confidence, which is provided with information. It defines its quality as well, to comply with the relevant directives and standards in the manufacture of, and that the enclosed information is sent to the user. This requires the manufacturer, the distributor and the user to comply with it. There is no production without material handling, but GMP (Good Manufacturing Practice) does not yet have a chapter on logistics. References to handling raw materials and finished products can be found in the corresponding GMP chapters, the responsibility of the correct execution are borne by the manufacturer. In this case, the effect of the common sense prevails exponentially, keep the medicine in mind and it has to be done, that no loss, no quality deterioration is not caused by the transport, handling of such loads, storage. It is typical that the raw material and the finished product are going through the entire site during the pharmaceutical manufacture. Starting from the warehouse, it runs through the manufacturing facilities, on the packaging, and some units go to the lab, so that eventually, in medicine form returns to the warehouse, from where it goes further in the supply chain through the pharmacies to the patients. In our study we examine the logistics activity and problems of a small pharmaceutical company and tasks to be solved presented in the light of the theory.

  • Sándor Csikós ,
    Tamás Molnár ,
    Péter Szuchy ,
    László Gogolák ,
    István Bíró ,
    József Sárosi :
    Vibrational tests and analysis on materials used in aircraft32-36en [592.72 kB - PDF]EPA-02592-00011-0040

    The current cargo capacity for aircraft is about 20% of their total weight, increasing this ratio would significantly increase the economics of aircraft logistics. This is why it’s important for material sciences to advance so that the materials used in aircraft construction become lighter while still retaining their structural integrity. In this paper we examined materials used in aircraft construction (steel, aluminum, plastics and composites) at the University of Szeged Faculty of Engineering. Using vibrational analysis we analyzed the test pieces for their natural frequency, we did this to gain insight to the range of frequencies that are least attenuated by the material the aircraft wings are made from. Using the data we gathered we wish to draw conclusions to which materials are more suited for aircraft wing construction.

  • Edina Lendvai ,
    Ágnes Ördög :

    The term agricultural marketing is composed of two words-agriculture and marketing. Agriculture, we can think about the soil, the forests, the sea, so it includes all the primary activities of production systems in relation to animal, plant, food production. But, generally, it is used to mean growing and/or raising crops and livestock. The study of agricultural marketing comprises all the operations, and the agencies conducting them, involved in the movement of farm-produced foods, raw materials and their derivatives, such as textiles, from the farms to the final consumers, and the effects of such operations on farmers, middlemen and consumers. In our primer research a questionnaire was made by us. The topic of the questionnaire was the consumption of these local products and the knowledge about the common agricultural marketing. The main group of our research was the graduated people, we think, they have more information and income, so they attitude is positive for these products. We have known, the most of the participants had heard about the agricultural marketing, but the main institute, AMC not yet. The problems with the local products – in the opinion of the participants are: higher price, less choice, no too comfortable shopping.

  • Eszter Ács ,
    Brigitta Zsótér :
    The physiological effects of fish consumption45-50en [399.04 kB - PDF]EPA-02592-00011-0060

    Fish contains nutrients which are essential for our organism, vitamins (for example: A; B1; B2; D), minerals and various unsaturated and polyunsaturated fatty acids (for example: Omega 3 fatty acid). The latest cannot be produced by our organism, but indispensable to its normal operation. There is literature on its various effects on the brain, immune system, and it is widely known that it plays a significant role in preventing cardiovascular diseases, since due to its anti-inflammatory effect it is able to cure inflammations on the vascular walls. Omega 3 fatty acids appear mainly in marine phytoplankton and in sea fish in large quantity. We can see that our organism would need regular fish consumption. Researches show that one should take 1 gram of Omega 3 fatty acid on a daily basis. Experts state that fish is one of the indispensable conditions of a healthy diet, so we should consume fish twice a week. Despite the fact that fish is delicious and healthy, it is not part of our everyday menu. The ideal consumption of oily fish would be more than 15 kg/capita/year, but in Hungary this is hardly 4 kg/capita/year.

  • Judit Csizmásné Tóth ,
    Zsolt Hollósy ,
    Judit Poór :

    This paper presents the expansion of renewable energy sources of electricity generation over the last 10-15 years, based on statistical data for Hungary and for the EU-28 member states. The share of renewable energy in electricity production was almost 30% in the EU28 in 2016, while in Hungary it was only 7%, which is the second lowest share in EU member states. In Hungary, the share of nuclear energy is still high in electricity production, and the proportion of biomass in renewable energy in Hungary is very high compared to the EU-28 average. An important issue for Hungary is how to reduce the share of nuclear energy in the longer term. Finally, the paper highlights the essential elements of the Hungarian METAR subsidy system aimed at encouraging the production of electricity (and heat) energy from renewable energy sources while minimizing the burden on end users.