PL
 |
EN
Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 12

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available Global economic changes, optimization of Virtual Enterprises : software development
100%
Kovacs G.
Polish Journal of Management Studies
|
2017
|
tom Vol. 15, No. 2
115--131
EN
Changing market environment, global competition, rapidly fluctuating customer demands and more complex global network of supply chains require new production conceptions (Pull, Lean) and technologies. Novel supply chain paradigms (1. Lean-, 2. Agile-, 3. Leagile Supply Chain) are forms in order to increase and maintain competitiveness of companies. New organization and cooperation forms are formed. The members of an Agile Supply Chain form Virtual Enterprise (VE) network, which supports the fast and flexible fulfilment of changing customers’ demands. The goal of the study is the VE network optimization, which means the formation of optimal combination of ideal chain’s members (production companies, service providers and customers). This study is original and unique, since an optimization method, objective functions (total cost and lead time) and design constraints have been elaborated. Based on the elaborated method an optimization software has been developed which can be widely used for optimization of micro- and macro regional networks.
PL
Zmiana otoczenia rynkowego, globalna konkurencja, gwałtowne wahania zapotrzebowania klientów i bardziej złożona globalna sieć łańcuchów dostaw wymagają nowych koncepcji produkcji (Pull, Lean) i technologii. Paradygmaty łańcucha dostaw (1. Lean-, 2. Agile-, 3. Leagile Supply Chain) są formami powstałymi w celu zwiększenia i utrzymania konkurencyjności firm. Powstają nowe formy organizacji i współpracy. Członkowie Łańcucha Agile Supply Chain tworzą sieć wirtualnego przedsiębiorstwa (Virtual Enterprise, VE), która zapewnia szybkie i elastyczne spełnianie zmieniających się wymagań klientów. Celem badania jest optymalizacja sieci VE, co oznacza tworzenie optymalnej kombinacji idealnych członków łańcucha (firm produkcyjnych, dostawców usług i klientów). Przedstawione badania są oryginalne i unikalne, ponieważ opracowano metodę optymalizacji, funkcje celu (całkowity koszt i czas realizacji) oraz ograniczenia projektowe. Na podstawie opracowanej metody opracowano oprogramowanie optymalizacyjne, które można szeroko wykorzystać do optymalizacji sieci mikro- i makroregionalnych.
2
Innovative mathematical methods and new software applications for cost-effective, profitable and environmentally friendly freight transport
100%
Kovacs G.
Polish Journal of Environmental Studies
|
2019
|
tom 28
|
nr 4
EN
Due to the optimization and efficiency improvement of freight transportation, fuel consumption and environmental damage are reduced. Furthermore, if companies are more profitable, they can afford to invest in environmentally friendly technologies. Consequently, transportation will become more economic, sustainable and environmentally friendly. Three innovative methods and three new software applications have been developed to provide profitable and sustainable transportation: 1) Structure of key performance indicators and software for continuous evaluation of transport activity. If we can measure the performance, we can improve it in the future. 2) Calculation method and software for precise determination of the total prime cost of a given transportation order. It is significant, because knowing the prime cost, the carrier can calculate the expected profit. Since the transport fee includes the profit, profitable operation can be ensured. 3) Optimization method and software to optimize the fuel cost. At first by determining the optimal, most cost-effective petrol station (depending on the unit fuel price and distance of the potential petrol stations). Then the optimal amount of fuel has to be calculated, i.e. the exact amount needed, plus a safe margin to cover unexpected events. Recently the above-mentioned activities have been unsupported by software, therefore this research is original.
3
Content available Development of performance evaluation software for road freight transport activity
100%
Kovacs G.
Polish Journal of Management Studies
|
2017
|
tom Vol. 15, No. 1
121--134
EN
In the growing market globalization, global competitions, where the customer demands are changing continuously the enterprises have to focus on cost reduction and efficiency. The measurement of processes and activities is very important, because if we can measure the performance of processes, we can improve it in the future. The measurement of processes and activities by KPIs (Key Performance Indicators) is frequently used in general business to evaluate historic data and identify the weak areas and define improvement areas and goals of the enterprise. The goal of this study is the performance measurement and evaluations of road freight transport activity, because the transportation is one of the most expensive logistical processes. At first the structure of 4 most common used transport metrics /time utilization, transport way utilization, weight of transported freight, fuel usage relating to vehicles and transport trips/ are elaborated, then the calculation method for these transport metrics is introduced. Based on the elaborated structure of transport indicators, evaluation software was developed which is also introduced in this article. This is the reason that this research is absolutely original and unique. The developed evaluation software was implemented successfully at a forwarding company.
PL
W rosnącej globalizacji rynku, globalnej konkurencji, w której wymagania klientów stale się zmieniają, przedsiębiorstwa muszą koncentrować się na redukcji kosztów i efektywności. Pomiar procesów i działań jest bardzo ważny, ponieważ jeśli możemy zmierzyć wydajność procesu, to możemy go w przyszłości poprawić. Pomiar procesów i działań według kluczowych wskaźników efektywności (ang. Key Performance Indicators, KPI) jest często stosowany w przemyśle ogólnym w celu oceny danych historycznych, zidentyfikowania słabych obszarów, określenia obszarów i celów przedsiębiorstwa. Celem tego badania jest pomiar i ocena działalności w zakresie transportu drogowego, ponieważ transport jest jednym z najbardziej kosztownych procesów logistycznych. Początkowo opracowano strukturę 4 najczęściej stosowanych metryk transportu (wykorzystania czasu, wykorzystania środków transportu, ciężaru przewożonego ładunku, zużycia paliwa w pojazdach podczas transportu). Następnie opracowano metodę obliczania tych parametrów transportu. Opierając się na opracowanej strukturze wskaźników transportowych, opracowano oprogramowanie oceniające, które zostało również wprowadzone w tym artykule. Z tego powodu badania są absolutnie oryginalne i niepowtarzalne. Opracowane oprogramowanie oceniające zostało zrealizowane z powodzeniem w firmie spedycyjnej.
4
Content available remote Post-rift deformations in the surroundings of Rechnitz tectonic window, Eastern Alps
100%
Kovacs G.
Geologia Sudetica
|
2014
|
tom Vol. 42
41--42
5
Content available Facility layout redesign for efficiency improvement and cost reduction
63%
Kovacs G. , Kot S.
Journal of Applied Mathematics and Computational Mechanics
|
2017
|
tom Vol. 16, nr 1
63--74
EN
In a competitive market the manufacturing companies have to produce cost effective products which can be realized by minimized production cost and higher effectiveness. The effective facility planning can significantly reduce the operational costs of companies. An adequate facility layout can result in the improvement of the performance of the production line. The Facility Layout Problem (FLP) is relating to location of objects (departments, workstations, machines, etc.) on a given site and the material flow between these objects. The goal of this study is to show the reasons, objectives and steps of a layout redesign process. The minimization of the workflow realized on the shop floor is an often applied an objective function during the layout redesign. Material flow efficiency is a commonly used term for the determination of the amount of workflow, which is the multiplication of material flow data and distance data. In this study, this mathematical method for workflow calculation is introduced. The described case study shows how the efficiency and reduced manufacturing cost of a real manufacturing system can be improved by re-layout design, while smaller floor space is needed for the production.
6
Content available remote Nonlinear Simulation of a Magnetic Flux Leakage Measurement System
63%
Kovacs G. , Kuczmann M.
Przegląd Elektrotechniczny
|
2008
|
tom R. 84, nr 12
184-187
EN
The paper presents the building up of a computer controlled measurement system based on National Instruments Data Acquisition card and National Instruments LabVIEW software package. The aim of this research is to detect surface cracks on steels by applying a Magnetic Flux Leakage (MFL) testing method. First, a finite element based procedure has been implemented to analyze the arrangement. One important question is the position of the sensors. Now, eddy currents have been neglected, but the nonlinear characteristics of specimen have been taken into account.
PL
Artykuł przedstawia tworzenie sterowanego komputerowo systemu pomiarowego opartego o kartę National Instruments Data Acquisition oraz oprogramowanie National Instruments LabVIEW. Celem badań jest detekcja pęknięć w stali przy zastosowaniu systemu testowego opartego o magnetyczny strumień rozproszenia. Po pierwsze, wykorzystano procedurę elementów skończonych do analizy istniejącego układu. Po drugie, rozpatrzono pozycję czujnika. Pominięte zostały prądy wirowe, ale wzięto pod uwagę nieliniową charakterystykę magnesowania badanej próbki.
7
Content available New logistics and production trends as the effect of global economy changes
63%
Kovacs G. , Kot S.
|
|
tom Vol. 14, No. 2
115--126
EN
The growing market globalization, increasing global competition, and more complex products results application of new technologies, methods and business processes. Fast changing market environment and fluctuating customer demands require efficient operation of logistical processes. In this study the logistical tendencies and challenges are introduced with reasons and driving forces. Tendencies in the changes of customer demands, production requirements, formation of supply chains, inventory strategies, transportation activities and activity of the logistics service sector are analyzed. Finally the Industry 4.0 conception is introduced which will change the production and logistical processes drastically.
PL
Rosnąca globalizacja gospodarki, wzmagająca się konkurencja światowa oraz bardziej złożone produkty prowadzą do zastosowania nowych technologii, metod i procesów biznesowych. Szybko zmieniające się otoczenie rynkowe i zmieniający się popyt wymagają sprawnego funkcjonowania procesów logistycznych. W niniejszym badaniu omówione zostały tendencje i wyzwania logistyczne wraz z ich uzasadnieniem i siłami, które wpływają na ich rozwój. Analizowane są tendencje zmian wymagań klientów, wymagań produkcyjnych, tworzenia łańcuchów dostaw, zapasów, strategii działań komunikacyjnych oraz aktywności sektora usług logistycznych. Wreszcie omówiona została koncepcja Przemysłu 4.0, która drastycznie zmieni procesy produkcyjne i logistyczne.
8
Content available remote Simulation and Measurement of Magnetic Based Nondestructive Tester
63%
Kovacs G. , Kuczmann M.
Przegląd Elektrotechniczny
|
2009
|
tom R. 85, nr 12
76-79
EN
The paper presents the analysis of a nondestructive testing equipment under investigation. There are three main parts of the research as well as this paper. The first part shows the present state of the developed nondestructive tester based on the Magnetic Flux Leakage (MFL) method, the second part reviews the simulation and the results, which have been made with the principle of the Finite Element method (FEM). The last part presents the measurement results, which have been performed with the nondestructive tester. In this paper the simulation results with the measurement results have been compared.
PL
W artykule przedstawiono analizę wyposażenia do badań nieniszczących wykonaną w trakcie tych badań. Badania skoncentrowano na trzech kierunkach: pierwszy to opisanie obecnego stanu badań z wykorzystaniem magnetycznego strumienia rozproszenia, drugi to przegląd symulacji i i jej wyników) metodą elementów skończonych, i trzeci kierunek to pomiary wykonane na pracujących urządzeniach w badaniach nieniszczących. Wyniki tych trzech kierunków badawczych zostały porównane.
9
Content available Response of lemon balm (Melissa officinalis L.) accessions to Septoria leaf spot (Septoria melissae Desm.) in Hungary
51%
Kovacs G. , Nagy G. , Zambori-Nemeth
Journal of Plant Protection Research
|
2020
|
tom 60
|
nr 1
10
Content available Susceptibility of lemon balm (Melissa officinalis L.) varieties to Septoria leaf spot (Septoria melissae Desm.) in Hungary
51%
Kovacs G. , Zambori-Nemeth E. , Nagy G.
|
2019
|
tom 18
|
nr 1
EN
Lemon balm (Melissa officinalis L.) is a widely cultivated plant in Europe. Septoria melissae Desm. is the most important pathogen of lemon balm crops, which may cause serious yield loss by the severe leaf fall. As chemical control of the pathogen is restricted, alternative plant protection methods, like the use of tolerant varieties, should be taken under consideration. The goal of our work was to evaluate the susceptibility of three lemon balm varieties to Septoria leaf spot in field. The trials were carried out in 2016 and 2017 in Budapest-Soroksár, Hungary. Dynamics of infection showed characteristic sharp increase from the beginning of August in both years. The lowest infection levels were observed in cultivar ‘Lemona’. The disease incidence in the middle of August was 19% in the first year and 59% in the second year, while these values were over 40% and 70% in the other cultivars ‘Soroksári’ and ‘Quedlinburger Niederliegende’, respectively. The manifestation of symptomps was also significantly lighter on the ‘Lemona’ plants and they had the highest ratio of healthy leaves (81%) compared to the other cultivars. According to the data, weather conditions might modify the range of the differences among the cultivars. It was concluded that appropriate selection of varieties could be an effective and enviromental friendly plant protection method in the practice of lemon balm cultivation.
11
Colchicine, genome-doubling agent for maize microspores
51%
Obert B. , Kovacs G. , Barnabas B.
Acta Biologica Cracoviensia. Series Botanica. Supplement
|
1999
|
tom 41
|
nr 1
12
Content available Nutrient content restructuring and CT-measured density, volume attritions on damaged beans caused by Acanthoscelides obtectus Say (Coleoptera: Chrysomelidae)
38%
Keszthelyi S. , Egri H. B. , Horvath D. , Csoka A. , Kovacs G. , Donko T.
Journal of Plant Protection Research
|
2018
|
tom 58
|
nr 1
EN
Leguminous plant products have great nutritional and economic importance in the European Union, which is reflected by its protein policy. These harvested yields are risked by stored product pests, such as Acanthoscelides obtectus Say, which can cause up to 50–60% loss in stored bean items. The bean weevil causes both quantitative and qualitative damage to seeds. We aimed to map the qualitative damage of this devastating pest, which deteriorates the nutritional content of bean kernels. Furthermore, our purpose was to determine accurately the decrease in the volume and density alteration in beans caused by this important stored product pest using CT-assisted imaging analysis. Our results showed that the nutritional arrangement in damaged beans was caused by A. obtectus. The measured nutrient content increment in damaged samples can be explained by the presence of extraneous organic material which originates from perished specimens of the bruchin pest. This is a negative phenomenon in bean items used as forage, because of the loss of valuable proteins and rancidity in herbal oils. Weight loss triggered by developing larvae was 49.42% in examined bean items. The use of 3D technologies has greatly improved and facilitated the detailed investigation of injured seeds. The density (75,834 HU; 41.93%) and the volume (296.162 mm3; 26.21%) values measured by CT of the examined samples were significantly decreased. The decreasing of tissue density in damaged beans can be accounted for by the consumption of starch present at a high ratio and that of the dense reserve components in the cotyledons.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.