Search results for "efficiency"
showing 10 items of 1430 documents
Efficiency of temporal sensor data compression methods to reduce LoRa-based sensor node energy consumption
2022
Purpose Minimizing the energy consumption in a wireless sensor node is important for lengthening the lifetime of a battery. Radio transmission is the most energy-consuming task in a wireless sensor node, and by compressing the sensor data in the online mode, it is possible to reduce the number of transmission periods. This study aims to demonstrate that temporal compression methods present an effective method for lengthening the lifetime of a battery-powered wireless sensor node. Design/methodology/approach In this study, the energy consumption of LoRa-based sensor node was evaluated and measured. The experiments were conducted with different LoRaWAN data rate parameters, with and without …
MEASURING PERFORMANCE IN THE PUBLIC SECTOR: BETWEEN NECESSITY AND DIFFICULTY
2014
Performance measurement (PM) in the public sector is indeed a necessity. PM has been introduced in many public organizations in order to ensure transparency of public decisions and the use of public funds and to boost performance. But in practice, this concept strikes many obstacles: defining performance in the public sector, identifying suitable performance indicators, implementation of a performance management system. A challenge, still present, is to identify the most suitable methods for monitoring and measuring performance, so do not give rise to speculative behavior among employees and managers. This paper presents the methods used in measuring performance in the public sector, as wel…
Efficiency Improvement of Permanent-magnet Synchronous Motor Drives for Household Appliances
2011
This paper deals with some aspects of efficiency improvement of PMSMD (Permanent Magnet Synchronous Motor Drives). Particularly two aspects are focused: the control algorithm for the PMSMD, which allows to reduce the power losses of the electric drive without penalty on its dynamic performances and the optimization of an IPMSM (Interior Permanent Magnet Synchronous Motor) rotor configuration capable to increase the performances in terms of shaft torque production, limiting at the same time the rotor leakage flux. The loss minimization algorithm is here briefly analysed, a test bed for experimental validation is presented and the data are analysed. Experimental tests have been performed aimi…
Energy efficiency and photovoltaic solar for greenhouse agriculture
2011
Drainage inlets efficiency and its impact on pluvial flooding hazard evaluation uncertainty
2014
Flooding events in urban areas occur quite frequently as a consequence of rain events of lower intensity than the design one, even in case of correct network dimensioning. Inlets are in those cases the critical nodes, and efficient drainage is only ensured when care is taken on their appropriate design and positioning within the pluvial flood-prone areas. Classical approach for design and position of these hydraulic structures can result in high level of uncertainty in defining properly risk levels in urban areas. Further, evaluation of flood hazard in urban areas is made even more difficult if one considers that pluvial flooding can be caused by storm events characterised by a low return t…
Powietrze jako dolne źródło pompy ciepła
2016
W pracy przedstawiono wyniki analiz efektywności energetycznej wykorzystania do ogrzewania budynków jednorodzinnych oraz podgrzewania ciepłej wody użytkowej powietrznych pomp ciepła. Przedstawiono różne rozwiązania dolnych źródeł ciepła pompy wykorzystujących powietrze atmosferyczne lub powietrze z systemu wentylacji budynku. Dokonano również analizy okresu zwrotu inwestycji systemu ogrzewania z wykorzystaniem powietrznej pompy ciepła.
Preparation of tungstophosphoric acid/cerium-doped NH2-UiO-66 Z-scheme photocatalyst: a new candidate for green photo-oxidation of dibenzothiophene a…
2021
International audience; The goal of this study was to introduce an effective visible-light induced photocatalytic system with a good ability for photocatalytic oxidative desulfurization (PODS) and denitrogenation (PODN) using molecular oxygen (O2) as an oxidant. In this regard, tungestophosphoric acid (PW12) was supported onto cerium-doped NH2-UiO-66 (PW12/Ce-NUiO-66) and employed for the photo-oxidation of dibenzothiophene (DBT) and quinoline (Qu). Herein, using cerium (Ce) as a “mediator” facilitated the separation of charge carriers, while NH2-UiO-66 remarkably enhanced the surface area with plentiful adsorption sites and shifted the adsorption edge of PW12to the visible region. The sum …
PRIORITY MANAGEMENT – A DIRECTION TOWARDS COMPETITIVENESS
2010
In a time when the most of us have to cope with globalization, the key for surpassing the negative effects produced by it, resides in choosing the right strategy. This necessary involves a performance management. Through this paper we propose priority management as an efficient way of thinking about gaining the vital competitive advantage.
Fuzzy logic-decision-making system dedicated to evaluation of logistics project effectiveness
2016
Background: Project effectiveness is synonymous with project success. It is measured or assessed in terms of the degree to which project objectives are achieved. This paper presents an approach to evaluating the effectiveness of logistics projects. The starting point is the analysis of the current state of knowledge in the area of assessing project effectiveness, including logistics projects. The purpose of the study was to identify the critical factors determining the success of logistics projects and develop a model of logistics project effectiveness. Methods: The paper is based on the available recent scientific-theoretical research and publications and on practical studies in 25 enterpr…
Fuzzy logic-decision-making system dedicated to evaluation of logistics project effectiveness
2016
Background: Project effectiveness is synonymous with project success. It is measured or assessed in terms of the degree to which project objectives are achieved. This paper presents an approach to evaluating the effectiveness of logistics projects. The starting point is the analysis of the current state of knowledge in the area of assessing project effectiveness, including logistics projects. The purpose of the study was to identify the critical factors determining the success of logistics projects and develop a model of logistics project effectiveness. Methods: The paper is based on the available recent scientific-theoretical research and publications and on practical studies in 25 enterpr…