scholarly journals Definition of Reference Models for Power, Weight, Working Width, and Price for Seeding Machines

Agriculture ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 186 ◽  
Author(s):  
Tatevik Yezekyan ◽  
Francesco Marinello ◽  
Giannantonio Armentano ◽  
Samuele Trestini ◽  
Luigi Sartori
Keyword(s):  
Environmental Performance ◽  
Selection Process ◽  
List Price ◽  
Power Weight ◽  
Technical Parameters ◽  
Functional Parameters ◽  
Fleet Composition ◽  
Reference Equations ◽  
Definition Of ◽  
Perceived Choice

Machine functional parameters define fleet composition and management and, thus, play an important role in economic and environmental performance. Large availability of programming methods and decision support systems are available in the market, however, there is still a lack of applicative tools to forecast the perceived and necessary technical parameters and machinery price options to complete tasks. In the current research, most correlated functional parameters for four group of seeding machines were determined with the application of linear and multiple linear regression analyses. Power, weight, working width, number of rows, and list price were studied, and reference equations were developed for seed drills, precision, combined and no-tillage planters. Two statistical analyses models were, therefore, developed for each of the groups in order to allow evaluation and prediction of performance and cost, thus contributing to the selection process optimisation and perceived choice of the needed implement.

scholarly journals Definition of Reference Models for Power, Mass, Working Width, and Price for Tillage Implements

Agriculture ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 197
Author(s):  
Tatevik Yezekyan ◽  
Marco Benetti ◽  
Giannantonio Armentano ◽  
Samuele Trestini ◽  
Luigi Sartori ◽  
...  
Keyword(s):  
Selection Process ◽  
A Priori ◽  
Mass Relation ◽  
Technical Parameters ◽  
Proper Estimation ◽  
Definition Of ◽  
Primary Output ◽  
Adjustment Issues ◽  
Operation And Management ◽  
Modelling Approach

Farm machinery selection, operation and management directly impact crop cultivation processes and outputs. A priori quantification of technical and financial needs allows definition of proportionate distribution and management of available resources and simplification of selection process. Appropriate planning, association and adjustment of the power unit and implement are required for soil cultivation. Consideration of functional parameters of the implement, their proper estimation and operation directly impact the soil structure, productivity and return on investment. Thus, a modelling approach was implemented for the definition of possible parameter-price relations for tillage equipment. The performed analysis allowed us to investigate the main relevant parameters, quantify their impact, and elaborate forecasting models for price, power, mass and working width. The significant relevance of the technical parameters and adjustment issues were outlined for each tillage implement group. For harrows and cultivators, the dependencies between studied parameters expressed better predictive qualities, especially for price-mass relation (R² > 0.8). While for ploughs power and mass relation had a primary output (R² = 0.7). The prediction features of the models provided reliable results for the estimation of the indicative values of the price and parameters of the implements.

A Simulation Survey on the Effects of Progressing Faults Within the SCAS of a Flight Control Actuator for Helicopters

2021 ◽  
Author(s):  
Andrea De Martin ◽  
Giovanni Jacazio ◽  
Massimo Sorli ◽  
Giuseppe Vitrani
Keyword(s):  
Flight Control ◽  
Health Management ◽  
Risk Mitigation ◽  
Selection Process ◽  
Stability Control ◽  
Features Selection ◽  
Vertical Walls ◽  
Low Altitude ◽  
Definition Of ◽  
Rotary Wing

Abstract Stability Control Augmentation Systems (SCAS) are widely adopted to enhance the flight stability of rotary-wing aircraft operating in difficult aerodynamic conditions, such as low altitude missions, stationary flight nearby vertical walls or in presence of heavy gusts. Such systems are based upon small electro-hydraulic servosystems controlled in position through a dedicated servovalve. The SCAS operates with limited authority over the main control linkage translating the pilot input in the movement of the main flight control actuator. Being critical for the operability of the helicopter, the definition of a Prognostics and Health Management (PHM) framework for the SCAS systems would provide significant advantages, such as better risk mitigation, improved availability, and a reduction in the occurrences of unpredicted failures which still represent one of the most known downsides of helicopters. This paper provides the results of a preliminary analysis on the effects of the inception and progression of several degradation types within a simulated SCAS system. Signals usually available within such devices are hence combined with measurements provided by additional sensors to check the feasibility of a PHM system with and without dedicated sensors. The resulting features selection process shows that although the dedicated measurements are required to design a complete PHM system, it appears nonetheless possible to obtain valuable information on the health status of the SCAS system without resorting to additional sensors.

scholarly journals A modified approach to patient’s selection with improved clinical outcomes in sacral nerve modulation

2013 ◽  
Vol 5 (6) ◽  
pp. 403
Author(s):  
Patrick Richard ◽  
Maude Carmel ◽  
Bechir Hage ◽  
Sophie Ramsay ◽  
Le Mai Tu
Keyword(s):  
Nerve Stimulation ◽  
Sacral Nerve Stimulation ◽  
Pulse Generator ◽  
Selection Process ◽  
Screening Method ◽  
Complication Rates ◽  
Sacral Nerve ◽  
Long Term Effect ◽  
Percutaneous Nerve Evaluation ◽  
Definition Of

Introduction: Since the marketing of the percutaneous permanenttined leads (PPTL), many centres rely solely on these instead ofthe percutaneous nerve evaluation (PNE) as a screening tool. Atour centre, we routinely perform PNE. Moreover, with our limitedhospital resources, we have adopted a stricter definition of successin the patient selection process using an improvement of morethan 60% as a cut-off point. This study presents our experiencewith sacral nerve stimulation using PPTL as an adjunct to PNE toimprove the outcome of the screening method for patients sufferingfrom refractory voiding dysfunction.Methods: We reviewed the charts of 106 patients who underwenta PNE between 2001 and 2008. The outcome of the procedures,the complication rates and its long-term effect were reviewed.Results: Overall, 116 PNE were performed and it was successfulin 54%. Forty-five out of the 62 patients with a successful PNEunderwent the stage I procedure. Of these, 93% had a successfulstage I and were later implanted with the implantable pulse generator(IPG). The remaining 12 patients underwent the simultaneousimplantation of the PPTL and IPG using the open procedure andit was successful in 10 of them.Conclusion: The PNE is a good adjunct to the staged procedureto select the appropriate candidates for sacral nerve stimulation,especially with limited resources.

scholarly journals CERTIFICATION OF WOOD PELLETS AS AN IMPORTANT COMPONENT OF ITS DISTRIBUTION

2018 ◽  
pp. 238-246
Author(s):  
Nataliia Halysh
Keyword(s):  
Energy Use ◽  
Comparative Characteristic ◽  
Wood Pellets ◽  
Product Certification ◽  
Technical Parameters ◽  
Effective System ◽  
Distribution Process ◽  
Characteristic Features ◽  
Definition Of ◽  
Made In

Introduction. The article discloses the content of certification of wood pellets as a necessary component of its distribution through export. The comparative characteristic of wood pellets' technical parameters according to various European certification systems (DIN plus, EN plus A1, EN plus A2, EN-B) is presented. The scheme of the process chain for creating the value of biofuels with the distinction of main processes (production, sales and end energy use) is substantiated. The tendencies of price changes on wood pellets during 2011-2017 are analysed. The range of the main consumers of pellets in Ukraine is outlined. As a result of the analysis, proposals have been provided for adjusting the strategy of management of wood pellet production in order to standardize products and increase the sales efficiency on this basis. Purpose. The article aims to justify the need for certification of wood pellets, which are manufactured by domestic enterprises on the basis of consumer demand analysis and trends in the development of the European market for wood pellets. Method. The article uses standard methods of scientific research, such as systematization, processing, data summation, definition of generalized synthetic indices, presentation of the obtained results in the form of statistical tables, graphs and figures. The methodology of the Ukrainian Pellet Union is used to create a profitability algorithm based on certification. Results. The conclusions, which have been made in the article, prove that some characteristic features influence the distribution process of the wood pellets by enterprises. It has been investigated how product certification “adjusts” an effective system of sales at the enterprise. The results and recommendations, which have been described in the article, can be used by producers of wood pellets with completed cycle of value creation.

scholarly journals Economic efficiency of livestock organic waste processing into biонumus

2021 ◽  
Vol 23 (98) ◽  
pp. 34-39
Author(s):  
V. Maksym ◽  
D. Solomonko ◽  
R. Lytvyn ◽  
O. Stepaniuk
Keyword(s):  
Economic Efficiency ◽  
High Efficiency ◽  
Waste Processing ◽  
Small Farms ◽  
Livestock Waste ◽  
Extensive Form ◽  
Technical Parameters ◽  
Efficient Resource ◽  
Definition Of ◽  
High Level

The processing of organic livestock waste into biohumus is one of the direction areas in agribusiness, which contributes to the efficient resource allocation involved while achieving a high level of greening of production. The article presents the results of the study of economic efficiency of extensive form of vermiculture, which is characterized by minimal start-up investment, ease of organization and accessibility for the vast majority of livestock producers, including small farms, as it does not involve additional premises. Compared to intensive technology, which requires indoor heated premises to organize the production of biohumus throughout the year. The need for fixed and working capital for the organization of organic livestock waste processing into compost has been determined. Planning and analysis of costs for the organization of production and sale of vermiculture products. The main technical parameters of the organization of the production process are determined, which will ensure high efficiency of this type of business. Based on the definition of the main indicators of economic efficiency, the expediency of introducing an extensive form of organic livestock waste processing into biohumus is substantiated. According to the research results, it is established that the organization of extensive technology of processing organic livestock waste on compost is more appropriate for small farms in the livestock industry with a limited investment budget. As about 6 million UAH is needed to organize the processing of 2.400 tons of livestock waste. (in 2021 prices) of advanced capital, which is 30–40 % less compared to intensive technology of similar scale. The projected payback period of extensive vermiculture technology will be three years when it reaches 25 % of the level of profitability of sales. Also, the organization of extensive technology for processing animal waste into biohumus requires less time compared to intensive.

scholarly journals The Sensitivity of Power System Expansion Models on Climate Scenarios

2021 ◽  
Author(s):  
Bruno Schyska ◽  
Alexander Kies ◽  
Markus Schlott ◽  
Lueder von Bremen ◽  
Wided Medjroubi
Keyword(s):  
Power Systems ◽  
Power System ◽  
Meteorological Parameter ◽  
Weather Data ◽  
System Expansion ◽  
Technical Parameters ◽  
Expansion Planning ◽  
Order Of Magnitude ◽  
Definition Of ◽  
Expansion Model

<p>Power system expansion models are a widely used tool for planning power systems, especially considering the integration of renewable resources. Studies using these models form the basis for far-reaching political decisions. The backbone of power system models is an optimization problem, which depends on a number of economic and technical parameters. Although these parameters contain significant uncertainties, a consistent way to quantify the sensitivity to these uncertainties does not yet exist. Here, we analyze and quantify the sensitivity of a power system expansion model to the meteorological parameter time series based on a novel misallocation metric. We find that the sensitivity to the weather data is in the same order of magnitude as the sensitivity to the definition of cost. By comparing different climatic periods both from a meteorological perspective and with respect to the impacts on the optimal power system design we can, additionally, identify representative weather years and periods which should rather not be used for expansion planning.</p>

scholarly journals Performance indicators for monitoring Safety Management Systems in chemical industry

2009 ◽  
Vol 15 (1) ◽  
pp. 5-8 ◽  
Author(s):  
Milena Jovasevic-Stojanovic ◽  
Bozidar Stojanovic
Keyword(s):  
Chemical Industry ◽  
Performance Indicators ◽  
Environmental Performance ◽  
Safety Management ◽  
Operational Performance ◽  
Management Systems ◽  
Definition Of ◽  
Possible Cause ◽  
The Eu ◽  
Environmental Performance Indicators

The development of the Safety Management System (SMS) in chemical industry appears as one of the important requirements introduced by the EU 'Seveso II' Directive on the control of major-accident hazards. This paper aims to provide a contribution regarding the SMS structure and the definition of the tools for assessing the effectiveness of this system by means of safety performance indicators. The performance indicators are linked to a reference values or policy targets, illustrating how far the SMS is from the desired level. We developed a system of performance indicators for SMS in chemical industry by using the concept of environmental performance indicators defined in standard ISO 14031. A set of three types of safety system performance indicators was proposed: management performance indicators, operational performance indicators and safety status indicators. These indicators represent the most important factors in the linkage between a possible cause of an accident and its effects.

Impact of using different predictive equations on the prevalence of chronic byssinosis in textile workers in Pakistan

2021 ◽  
pp. oemed-2021-107680
Author(s):  
Asaad Ahmed Nafees ◽  
Muhammad Zia Muneer ◽  
Sara De Matteis ◽  
Andre Amaral ◽  
Peter Burney ◽  
...  
Keyword(s):  
Lung Function ◽  
Controlled Trial ◽  
Forced Expiratory Volume ◽  
Textile Workers ◽  
Middle Income ◽  
Low Middle Income Countries ◽  
Reference Equations ◽  
Predicted Values ◽  
Definition Of ◽  
Randomised Controlled

ObjectiveByssinosis remains a significant problem among textile workers in low/middle-income countries. Here we share our experience of using different prediction equations for assessing ‘chronic’ byssinosis according to the standard WHO classification using measurements of forced expiratory volume in 1 s (FEV1).MethodsWe enrolled 1910 workers in a randomised controlled trial of an intervention to improve the health of textile workers in Pakistan. We included in analyses the 1724 (90%) men who performed pre-bronchodilator spirometry tests of acceptable quality. We compared four different equations for deriving lung function percentage predicted values among those with symptoms-based byssinosis: the third US National Health and Nutrition Examination Survey (NHANES-III, with ‘North Indian and Pakistani’ conversion factor); the Global Lung Function Initiative (GLI, ‘other or mixed ethnicities’); a recent equation derived from survey of a western Indian population; and one based on an older and smaller survey of Karachi residents.Results58 men (3.4%) had symptoms-based byssinosis according to WHO criteria. Of these, the proportions with a reduced FEV1 (<80% predicted) identified using NHANES and GLI; Indian and Pakistani reference equations were 40%, 41%, 14% and 12%, respectively. Much of this variation was eliminated when we substituted FEV1/forced vital capacity (FVC) ratio (<lower limit of normality) as a measure of airway obstruction.ConclusionAccurate measures of occupational disease frequency and distribution require approaches that are both standardised and meaningful. We should reconsider the WHO definition of ‘chronic’ byssinosis based on changes in FEV1, and instead use the FEV1/FVC.

Environmental Quality of Impact Drills

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Beata Hricová ◽  
Ervin Lumnitzer
Keyword(s):  
Life Cycle ◽  
Comparative Analysis ◽  
Environmental Impact ◽  
Environmental Quality ◽  
Environmental Performance ◽  
Analysis Method ◽  
Technical Parameters ◽  
Production Stage ◽  
The Impact

AbstractEnvironmental performance of each product is defined already at the stage of its design - in its pre-production stage. Environmental quality of the product is one of the most important factors of environmental performance of a product. Environmental quality includes a range of criteria that indicate the nature of the product and its environmental impact throughout its life cycle. The comparative analysis method is one of the ways to assess the environmental quality of the product. The article gives a specific example of the assessments carried out on the impact drills (of one specific brand) with different technical parameters.

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