a borítólapra  Súgó epa Copyright 
Acta polytechnica HungaricaVolume 5, Issue No. 3 (2008.)


  • Ákos Borbély :
    Accurate Colour Reproduction in Prepress5-10en [152.38 kB - PDF]EPA-02461-00015-0010

    Abstract: The adjustment of colour to achieve an acceptable match between the displayed (soft copy) and printed (hard copy) document is an important task in prepress. In order to achieve such match colour management systems are used, these systems implement standards established by the International Colour Consortium (ICC).

    A key step of the colour management process is the calibration of display and output devices, the definition of the relationship between the native colour space of the device and a standard device-independent colour space. In this work the usability of the ICC colour management standard was investigated in case of flat panel LCD display calibration

  • Éva Borbély :
    Lyocell, The New Generation of Regenerated Cellulose11-18en [186.16 kB - PDF]EPA-02461-00015-0020

    Abstract: For the majority of the last century, commercial routes to regenerated cellulose fibres have coped with the difficulties of making a good cellulose solution by using an easy to dissolve derivative (e.g. xanthane in the case of viscose rayon) or complex (e.g. cuprammonium rayon). For the purposes of this paper, advanced cellulosic fibres are defined as those made from a process involving direct dissolution of cellulose. The first examples of such fibres have now been generically designaed as lyocell fibres to distinguish them from rayons, and the first commercial lyocell fibre is Courtaulds’ Tencel.

    Keywords: cellulose, fibre, lyocell

  • Vera Göndör ,
    Márta Pataki :

    Abstract: It is a common idea about designing in light industry that only those product parameters are focused on which are realized at the moment of delivery to the user. We developed a new, innovative design method, which considers the full life cycle of the product. We extended the widely used QFD method into a complex set of customer demands about the product. For the contradictory demands we set into the design process a modern method that provides the optimal compromise level. Computer software supports the use of both methods in everyday practice.

    Keywords: designing textile products, full life cycle, maintenance during usage, Quality Function Deployment, seeking compromise solutions, Harrington optimization method, desirability, compromise function

  • Csaba Horváth ,
    Zoltán Gaál :
    Operating Maintenance Model for Modern Printing Machines39-47en [475.37 kB - PDF]EPA-02461-00015-0050

    Abstract: The authors outlined a model to examine the modern printing machines’ unexpected breakdowns. They had been analysing the different downtimes for years. The results of the researches help to organize the pro-active maintenance at the graphic arts industry.

    Keywords: printing machines, predictive and pro-active maintenance, breakdown

  • Zoltán Juvancz ,
    Sarolta Barna ,
    Dániel Gyarmathy ,
    Ferenc Konorót :
    Study of Endocrine Disrupting Chemicals in Environment49-58en [210.92 kB - PDF]EPA-02461-00015-0060

    Abstract: Endocrine disrupting chemicals (EDC) cause more and more serious environmental pollutions. The EDCs show only ng-μg/l concentration level in the environment, therefore their determinations require multistep sample preparation processes and highly sophisticated instrumentation. This paper discuss the EDC effects, and show examples for determination of such compounds.

    Keywords: endocrine disrupting chemicals, toxic effects, sample preparation, GC/MS

  • Márta Kisfaludy :
    Fashion and Innovation59-64en [315.45 kB - PDF]EPA-02461-00015-0070

    Abstract: The link between fashion and innovation is showed from the point of view of a fashion designer, who did research work on this theme in her doctoral thesis. The author demonstrates some of the results expressed in her practical work.

  • Zoltán Koczor ,
    Áron Takács :

    Abstract: New trends in production processes result in the important role of innovation in a globalized economy. In the different market segments, strong competition does not allow even the smallest loss of the traditional processes, so the whole value-add process has to be managed by a complex, globalized, IT-based system and standardized management methods. In order to provide adequate and effective solutions the critical process elements, a whole new set of innovative engineering methods has to be developed. This paper analyses the means related to the existing production systems of light industry, discussing in detail the LEAN logic that is to minimise stock levels; and on the other hand attempts to give an overview of the up-to-date methods in proportion to their actual role.

    Keywords: globalization, LEAN, innovation, management system

  • Lívia Kokas-Palicska ,
    Iván Szücs ,
    Zsolt Borka :
    Characterisation of Fabric Drape Using Spectral Functions75-85en [211.12 kB - PDF]EPA-02461-00015-0090

    Abstract: The article compares the measurement and calculation methods of the fabric drape coefficient used for computer modeling and describes a new parameter. This is the spectral function that is based on fabric drape and it describes the cloth’s 3D plasticity, and ability to be fitted against forms. The new parameter can be used during design as well as during pre-production to for predicting tailorability in the garment industry.

    Keywords: drape, material testing of cloth’s

  • László Koltai ,
    Miklósné Baksay ,
    Sándor Rohrsetzer :

    Abstract: We used the principles of theoretical colloid chemistry and our earlier results. We developed further the measuring of the specific surface by adsorption method. The aim of the study was the change of the usability of the method in showing out the structural differences of the pulping process. We found that the different pulping processes results in differences of the specific surface of the fibres measured with iron/III/hydroxide, TiO2 and Methylene blue adsorption, and we also found that the specific surface data depend on the lignin content.

    Keywords: spruce cellulose, beating, specific surface, adsorption, lignin content

  • Ákos Nemcsics :

    Abstract: The architecture of our ancestors (mediaeval architectural design, folk architecture) can serve as a model for recent ecological architecture (concern choice of material or construction). This work is dealing with a special kind of mediaeval building such as with rotunda. Here, we deal with the practicality of the mediaeval design and with constructional questions of the rotunda. There is shown, how a rotunda can be reconstructed from its recently exposed fundament.

    Keywords: ecological construction, mediaeval structures

  • Judit Németh-Katona :
    Biologically Qualified Environment, Ecologically Evaluated Conditions101-104en [176.24 kB - PDF]EPA-02461-00015-0120

    Abstract: The biological quality of an environment is defined as the condition reflecting the quantitative representation of living organisms in a given space and time. My lecture presents how to qualify the environment of a biocenosis synbiologically, in other words, on the supraindividual level. In this case, qualifying the environment in practice means that both the quantitative and qualitative composition of the biocenosis, and also the factors responsible for their distribution in space and time are considered and evaluated as characteristics. The ultimate goal of examining conditions is to evaluate, in other words, to determine relevancy and significance in a given biocenosis. We are facing the problem that in Hungary at present the biological survey methods are not standardized, and they are highly varied. An environmental information system however cannot function before appropriate methods of biological survey are created. The lack of such methods would result that one of the three major, organically complementary sources of information (i.e. the abiotic sphere, the biosphere, and human society) is completely missing. From a different aspect, ecological survey studies are different from the rest of environmental survey studies, inasmuch as they study living organisms and their communities, thus inevitably utilizing the results of other environmental survey studies that evaluate different components. This indicates that the ecological section of all environmental survey studies is vitally important due to its complexity, and should be considered primarily decisive.

    Keywords: The quality of an environment, biologically qualified environment, ecologically evaluated conditions

  • Katalin Németh-Erdődi :
    Risk Management and Loss Optimization at Design Process of Products105-111en [314.93 kB - PDF]EPA-02461-00015-0130

    Abstract: We’d like to introduce a flexible system of design process elements to support the formation and tool selection of an efficient, „lean” product design process. To do this we identify numerical risk factors and introduce a calculating method for optimising taking into consideration
    - the effect of design steps on usage characteristics,
    - the time needed by the design elements and the resultant losses,
    - the effect of design on the success of the implementation process.

    A generic model was developed for harmonising and sequencing of market and technical activities with built-in acceptance phase. The steps of the model can be selected flexibly depending on design goals. The model regards the concurrent character of market, technical and organising activities, the critical speed of information flow between them and the control, decision and confirmation points.

    Keywords: Risk analysis, planning of planning, project management, product design, optimisation

  • Judit Németh-Katona :
    The Environmental Significance of Bioindicators in Sewage Treatment 117-124en [94.95 kB - PDF]EPA-02461-00015-0140

    Abstract: The presentation is about the significance of the bioindicators concerning environmental protection within the process of cleaning sewage. The existence of one or multi-celled organisms indicates the presence, condition or absence of certain parts of the water cleaning process. This way the optimal operation of the purifying appliances can be checked continuously and controlled in an environment friendly way.

    Keywords: The quality of an environment, sewage treatment, bioindicators, polisaprobic sewage water, mesosaprobic sewage water,oligosaprobic sewage water

  • Rozália Szentgyörgyvölgyi :
    Effect of the Digital Technology to the Print Production Processes 125-134en [144.35 kB - PDF]EPA-02461-00015-0150

    Abstract: Workflow systems are becoming applied in a wide range to improve productivity and quality control. Digital workflow systems developed by market leading companies meet this novel demand. These systems integrate jobs and forward them to the units addressed. Implementing these systems improve the market status of printing companies. Many routine and calculation tasks can be automated, administrative work can be simplified. In addition information flow becomes faster between units, workflow systems also enhance customer loyalty. All these advantages and opportunities make these systems an actuality to discuss. The objective of the research work is to draw attention to the process design solutions applied in Hungarian print industry, to introduce and analyze digital workflow systems and to provide information on relevant standards and operational background.

    Keywords: workflow, CIM, process integration

  • Mária Túri-Szerletics ,
    István Patkó :
    Environmental Contaminants in Foodstuffs 135-140en [94.95 kB - PDF]EPA-02461-00015-0160

    Abstract: Consumers have specific concerns about food contaminants but often lack the means to make appropriate judgements on what is high risk and what is not. Contaminants in foods can be grouped according to their origin and nature. Environmental contaminants of food-safety concern includes toxic metals and elements, organometallic compounds, agricultural chemicals and persistent organic pollutants such as halogenated hydrocarbon pesticides, polychlorinated biphenyls, dioxins, polycyclic aromatic hydrocarbons, phthalates, nirates, nitrites. These contaminants may present a potential hazard for human health if exposure exceeds tolerable levels. This article shows the characteristics and the dietary intake of these elements and compounds. Further works need to concentrate on mechanism of different contaminants toxicity and metabolism, reevaluation of acceptable limits, and their control in foods and in the environment.

    Keywords: chemical food safety, environmental contaminants

  • Ádám Tilinger ,
    Gábor Madár :
    Spectral Radiosity Rendering Application for Lighting Researches141-146en [145.83 kB - PDF]EPA-02461-00015-0170

    Abstract: Lighting research often requires human surveys for defining subjective qualities. Creating new settings, new test scenarios is usually a time and resource-consuming task. As today many preference and comparison investigations are carried out on computer displays, the pictures to classify might well be generated. The aim of my current work is to create a rendering application that can model light appropriate enough to be used in lighting researches.

    Keywords: radiosity, lighting, spectral radiant exitance