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Wyświetlanie 1-5 z 5
Tytuł:
Metoda DEA w badaniu efektywności nadleśnictw
Data Envelopment Analysis in evaluation of the forest districts efficiency
Autorzy:
Młynarski, W.
Prędki, A.
Powiązania:
https://bibliotekanauki.pl/articles/989059.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Panstwowe Gospodarstwo Lesne Lasy Panstwowe
nadlesnictwa
gospodarka lesna
efektywnosc gospodarki
efektywnosc finansowa
metody analizy
metoda DEA
forestry
efficiency
dea method
Opis:
The aim of this paper was to evaluate the financial and economic resources efficiency of forest districts in the years 2008−2012 using a nonparametric approach of the Data Envelopment Analysis (DEA). DEA is a linear programming based method for evaluating the performance of comparable production units such as firms. The relative efficiency of compared forest districts is calculated with the Variable Returns to Scale (VRS) model. Although the method is already extensively applied in many areas of economics, its use in forestry remains limited. We studied 110 forest districts from Wrocław, Katowice, Kraków and Krosno regional directorates of the State Forests. The research was conducted in groups of forest districts according to the similar forest site type, which ensured the homogeneity of the units and the comparability of research results. Two categories of the forest districts were identified: ‘lowland' and ‘upland−mountain' ones. The study covered selection of input (efforts) and output (results) variables as well as selection of appropriate DEA model, which were used to evaluate technical efficiency of the forest districts. Within the so−called model of economic resources they were quantified in technical units, whereas in a financial model – in value terms. The research shows differences in the use of economic and financial resources by the analyzed forest districts. The ‘lowland' were more effective than ‘upland−mountain' ones both in terms of the use of the financial and economic resources. Average relative efficiency in a financial model for the ‘lowland' forest districts amounts to 0.896, while for the ‘upland−mountain' ones – to 0.839. In economic resources model this parameter equals 0.853 and 0.823, respectively. The DEA method may be an alternative or complementary to other methods of evaluation of the forest district efficiency. Any attempt of such analysis may be very valuable support in the forest management.
Źródło:
Sylwan; 2017, 161, 12; 1018-1025
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
IPMI controller based on dedicated microcontroller for ATCA carrier board
Autorzy:
Perek, P.
Makowski, D.
Prędki, P.
Napieralski, A.
Powiązania:
https://bibliotekanauki.pl/articles/398128.pdf
Data publikacji:
2010
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
płyta nośna
Intelligent Platform Management Controller
advanced telecommunications computing architecture
carrier board
IPMI
Opis:
The Advanced Telecommunications Computing Architecture (ATCA) specification allows to meet the newest trends in high speed communication technologies. Furthermore, it provides manageability, availability and exceptional reliability at 99.999% level. Therefore, this architecture is perfect to use in control systems of complex projects like the Free-Electron Laser in Hamburg (FLASH) or the X-ray Free Electron Laser (X-FEL) that work with high-frequency signal processing, use high-speed communication protocols such as PCIe, Gigabit Ethernet or RocketIO and require continuous stable operation. Modular construction allows for flexible system configuration. What is worth emphasizing, in contrast to previous solutions like, VME (Versa Module Eurocard), it is possible to change the system configuration without the need for power shutdown. Hot-plug functionality is delivered by Intelligent Platform Management Interface (IPMI) system. For this reason, all ATCA units, which can be replaced in the field should have Intelligent Platform Management Controller (IPMC) that provides IPMI functionality. The IPMC is responsible for management and control of module on which it is placed. Due to the fact that the IPMC operates independently of another components, it allows to activation and deactivation other functional blocks of the module. For this purpose if has to communicate with the Shelf Manager according to IPMI standard. The IPMC monitors also vital operational parameters such as temperature, voltage, current and reports all abnormalities to the Shelf Manager. This paper presents the IPMC for ATCA Carrier Board with three AMC Bays. All IPMC functionalities required by ATCA specification are in this case fulfilled by microcontroller dedicated for IPMI management in xTCA systems.
Źródło:
International Journal of Microelectronics and Computer Science; 2010, 1, 2; 188-194
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Module Management Controller for MicroTCA-based Controller Board
Autorzy:
Perek, P.
Mielczarek, A.
Prędki, P.
Makowski, D.
Napieralski, A.
Powiązania:
https://bibliotekanauki.pl/articles/398031.pdf
Data publikacji:
2012
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
Micro Telecommunications Computing Architecture
MicroTCA
Module Management Controller
xTCA
xTCA for physics
Opis:
As a result of a growing interest in the xTCA systems by research centers conducting High Energy Physics (HEP) experiments, the PICMG xTCA for Physics Coordinating Committee is developing a new, attractive standards. They are specifically dedicated to control and data acquisition systems of HEP applications. These new specifications define a number of extensions to the Advanced Telecommunications Computing Architecture (ATCA) and Micro Telecommunications Computing Architecture ( μ TCA) standards. The MicroTCA for Physics specification, named MTCA.4, defines some new solutions in order to simplify an application of μ TCA specification in HEP facilities. The most important of them is μ RTM module which can be connected to the Advanced Mezzanine Card (AMC) and provides more usable area and additional I/O connectors at the rear of the shelf. The MTCA.4 also introduces additional channels dedicated for timing and synchronization signals that are available on backplane. Due to the fact that xTCA for Physics is a new specification which has not been officially published, both the AMC and μ RTM modules and the software for the MMC with possibility of μ RTM handling are not yet available. For this reason the preparation of firmware for the Module Management Controller (MMC) for AMC modules compatible with MicroTCA for Physics specification is required. This paper presents a structure of the MMC for the μ TC (MicroTCA-based Controller) board. It also describes the microcontroller software which fulfills the role of the MMC.
Źródło:
International Journal of Microelectronics and Computer Science; 2012, 3, 1; 25-31
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application for supervision and management of ATCA-based systems
Autorzy:
Wychowaniak, J.
Makowski, D.
Prędki, P.
Napieralski, A.
Powiązania:
https://bibliotekanauki.pl/articles/398049.pdf
Data publikacji:
2010
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
płyta nośna
inteligentny interfejs zarządzania platformą
Java
advanced telecommunications computing architecture
carrier board
intelligent platform management interface
shelf manager
X-ray free electron laser
Opis:
The Advanced Telecommunications Computing Architecture (ATCA) standard describes a powerful, high performance platform. Its implementation has been considered among candidates for a base of the control system of the X-ray Free Electron Laser (X-FEL), which is being built at Deutsches Electronen-Synchrotron (DESY) in Hamburg, Germany. The Low Level Radio Frequency (LLRF) control system is designed as a set of ATCA Carrier Boards. Each Carrier Board hosts an Intelligent Platform Management Controller (IPMC), which is developed in compliance with the PICMG specifications. IPMC is responsible for management and monitoring of components installed on Carrier Boards and pluggable Advanced Mezzanine Card (AMC) modules. The ATCA Shelf Manager is the main control unit of a single ATCA shelf, responsible for power management, fan modules and Carrier Boards installed in ATCA shelf. It provides a set of control and diagnostic capabilities regarding the shelf and its sub-modules. These capabilities are available for operators and can be used by higher level applications. This publication presents a software component intended to support management and supervision of the ATCA shelf and its sub-modules, including Carrier Boards with AMC modules. The application provides enhanced mechanisms of control and allows to acquire detailed information regarding status and parameters of crucial devices (e.g. power supply voltages, temperatures, presence of reference clocks). The information supplied from Shelf Manager combined with graphical user interface of the application provides visual representation of selected system components and contributes towards efficient control and supervision of Carrier Boards and entire ATCA-based platform.
Źródło:
International Journal of Microelectronics and Computer Science; 2010, 1, 2; 131-137
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnostic application for development of custom ATCA carrier board for LLRF
Autorzy:
Wychowaniak, J.
Prędki, P.
Makowski, D.
Sakowicz, B.
Napieralski, A.
Powiązania:
https://bibliotekanauki.pl/articles/397901.pdf
Data publikacji:
2010
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
inteligentny interfejs zarządzania platformą
płyta nośna
EIA RS-232
Java
advanced telecommunications computing architecture
intelligent platform management interface
carrier board
X-ray free electron laser
Opis:
The Advanced Telecommunications Computing Architecture (ATCA) standard describes a powerful and efficient platform. With multiple integrated solutions like redundancies and intelligent control mechanisms this technology is characterized with reliability estimated at the level of 99.99999 percent. These features make the standard perfect for use in projects like the Free Electron Laser in Hamburg (FLASH) and the X-ray Free Electron Laser (X-FEL) in order to help them meet the requirements of high availability and reliability. The ATCA standard incorporates advanced control systems defined in the Intelligent Platform Management Interface (IPMI) specification as one of the key elements. The entire ATCA implementation retains its functionality as long as the IPMI remains operational. The complexity level of the application increases, which results in preparing it to run and debugging being more difficult to perform. At the same time, only scrupulous elimination of any kind of possible deficiencies can enable the ATCA implementation to offer the desired level of reliability. Thus, diagnostics become crucial, which creates a need for additional tools performing these tasks during the preparations of both hardware and software for the ATCA application. The paper presents application aiding in development of the prototype Carrier Board by enabling the user of external PC station to perform diagnostic and control activities over the Board. It helps in examining all its components at the stage of running the Board, as well as in further operation analysis.
Źródło:
International Journal of Microelectronics and Computer Science; 2010, 1, 1; 99-104
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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