|
|
|
| Registros recuperados: 14 | |
|
| |
|
|
| Cortez,Jorge W.; Syrio,Marina G.; Rodrigues,Sonia A.. |
| ABSTRACT Soybean has significant economic importance in Brazil despite high production costs, making it necessary to increase the efficiency of mechanized harvest through the reduction of losses. Thus, this study aimed to evaluate the total losses in the mechanized soybean harvest as a function of the combination of header types, operating speeds, and geometry of collection frames. The study was carried out in a commercial farm in a randomized block design arranged in a 2 × 3 × 3 factorial with 10 replications, totaling 180 replications. The data were analyzed by descriptive statistics, analysis of variance, and quality control. The square frame can be used instead of the rectangular frame for the determination of the total losses. The increasing operating... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural mechanization; Control charts; Glycine max. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000400482 |
| |
|
|
| Carneiro,Franciele M.; Furlani,Carlos E. A.; Zerbato,Cristiano; Menezes,Patricia C. de; Gírio,Lucas A. da S.. |
| ABSTRACT Active optical sensors have been widely used for the spatial and temporal monitoring of peanut culture because they are accurate, non-destructive methods for rapidly obtaining data. The objective of this study was to determine the optimal stage of crop growth for collecting sensor readings based on correlations between quality indicators. In addition, we compared vegetation indices (Normalized Difference Vegetation Index [NDVI], Normalized Difference Red-Edge Index, [NDRE], and Inverse Ratio Vegetation Index, [IRVI]) by monitoring temporal variability in the peanut crop in order to determine which of them obtained the best reading quality throughout the process. The experiment was performed on the 2016/17 crop in the agricultural area of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Remote sensing; Arachis hypogaea L.; Control charts; Precision agriculture. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000800033 |
| |
|
|
| Paixão,Carla S. S.; Voltarelli,Murilo A.; Oliveira,Luan P. de; Bernache,Leonardo; Silva,Rouverson P. da. |
| ABSTRACT The mechanized harvesting of sugarcane has increased exponentially in recent years because of the gradual prohibition of burning on the cane fields in mechanizable and non-mechanizable areas. This study aimed to evaluate the wear of the basal cutting knives in two different mechanized sugarcane harvesters, through statistical process control. The experiment was conducted in Cravinhos, São Paulo, in an agricultural area, on July 25, 26, and 27, 2016. Two harvesters with different basal cutting mechanisms were evaluated: harvester A—Model BE1035e (conventional type knife), and harvester B—Model A8800 (racket type knife). The experimental design was completely randomized with two treatments. The wear was quantified by measuring the thickness increase... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Basal cutting; Control charts; Mechanized harvesting; Quality indicator; Statistical process control. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000400498 |
| |
|
|
| CORTEZ,JORGE W.; Missio,Camilla; Barreto,Ana K. G.; Silva,Marcelei D. Da; Reis,Gustavo N. Dos. |
| ABSTRACT: The quality of the sugarcane plantation affects the plantation longevity, yield and production costs. Therefore, this study aimed to evaluate the quality of sugarcane mechanized planting in day and night shifts. The mechanized planting was carried out in Ivinhema, MS, Brazil. For the evaluation of pre-planting seedlings, were collected 40 billets in the seedling area with 10 repetitions for each shift. For the other variables, it was held sampling, totaling 60 points, 30 points assessed for each shift. The variables evaluated were: total of natural damage and total of mechanized damage in pre-planting, shoot per meter, viable shoots per meter, total of unviable shoots, seedlings consumption and failures percentage. Data were analyzed with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Statistical process control; Saccharum spp; Control charts. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000601136 |
| |
|
|
| Conceição,Ketllin Z. da; Boas,Marcio A. Vilas; Sampaio,Silvio C.; Remor,Marcelo B.; Bonaparte,Danilo I.. |
| ABSTRACT Analyzing the physical-chemical and biological characteristics allows the evaluation of the water quality of a water body. Thus, the objective of this study was to determine the water quality index of the Passaúna and Piraquara rivers, as well as to apply statistical quality control methodologies to evaluate the data resulting from the monitoring of water quality. Therefore, a database with physico-chemical and microbiological parameters of the Passaúna and Piraquara rivers, a watershed of the Iguaçu River, belonging to the cities of Araucária and Piraquara, respectively Paraná, Brazil, was used to carry out the research. The water quality index was determined with the time series and, subsequently, these data were submitted to the statistical... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water quality index; Control charts; Capacity of the process. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000600951 |
| |
|
| |
|
|
| Paixão,Carla S. S.; Voltarelli,Murilo A.; Santos,Adão F. dos; Silva,Rouverson P. da. |
| ABSTRACT Sugarcane mechanized harvesting can lead to serious risks to the longevity of plantations when improperly operated, and may cause damages and disturbances in the remaining ratoons in the field. In this sense, this study aimed to evaluate the damage and disturbance to the sugarcane ratoons by the base cutting quality of two-blade models through statistical process control. The experiment was carried out during the 2015/16 growing season in an agricultural area of the Moreno Mill, located in Cravinhos, São Paulo, Brazil. The sugarcane harvester models A8800 (Machine 1) and BE1035 (Machine 2). The sugarcane variety cultivated in both treatments was SP80-1816. Thirty points were sampled per harvester, with 10-minute intervals between them. Equations... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cutting height; Control charts; Mechanized harvesting; Damages and disturbances; Saccharum spp. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162021000100056 |
| |
|
|
| Paixão,Carla S. S.; Voltarelli,Murilo A.; Silva,Rouverson P. Da; Tavares,Tiago De O.; Gírio,Lucas A. Da S.. |
| ABSTRACT: The intensive mechanization during the harvest operation and success of this operation depends on several factors, one of which is the length and format of the plots. The aim of this study was to evaluate the operating performance of a soybean harvester in different geometric plots shape, using as quality indicators performance parameters by means of statistical control tools of process. The experiment was conducted in March 2014 in the city of Uberaba - MG. Operational capacity was evaluated in the mechanical harvesting of soybeans in three plots: irregular, rectangular and trapezoidal. Performance evaluations of soybean harvester were made from the following parameters: displacement speed, engine rotation, cylinder rotation and concave opening.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Control charts; Grain harvester; Quality control; Glycine max (L.) Merrill. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000500961 |
| |
|
|
| Barbosa,RL; Adamczuk,GO; Dvojatzki,P; Trentin,MG; Lima,JD. |
| ABSTRACT The objective of this study was to evaluate the efficiency of electrical stunning by electronarcosis in a medium-size poultry processing plant located in southern Brazil. The current measurement of this type of stunning is presented, and then improvements to this method are proposed. Data were collected for 90 days. A quality indicator was proposed: the Stunning Severity Index (SSI), which includes elements of Statistical Process Control (SPC) using a p-chart (proportion chart) and measures. This index comprises the variables "wing-flapping," "arched head," and "rhythmic breathing." Using the proposed index, 5% of the birds, on average, presented inefficient stunning symptoms. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broilers; Animal welfare; Electric stunning by electronarcosis; Stunning severity index; Statistical Process Control; Control charts. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000200331 |
| |
|
|
| Alcântara,Aline S.; Prado,Jéssica P. do; Corrêa,Rafael de G.; Silva,Rouverson P. da; Voltarelli,Murilo A.; Vieira,Roberval D.. |
| ABSTRACT The success of soybean cultivation depends on several factors, one which is the use of high-quality seeds, which can guarantee growth of the desired plant population. The objective of this study was to monitor possible failures during the seed production process, and to determine the association between germination and tetrazolium tests through tools of Statistical Process Control (CEP). The experimental design was based on premises of the CEP, using percentage of germination, seed viability, mechanical damage, bed bug, and moisture as indicators of quality. It is possible to detect flaws in the soybean production process through control charts, as well as through germination and tetrazolium tests; results indicated that germination failures are... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max L.; Control charts; Quality indicators; Seed viability. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001000689 |
| |
|
|
| Rocha,Hermes S. da; Marques,Patricia A. A.; Camargo,Antonio P. de; Reis,Douglas L. dos; Silva,Eric A. da; Frizzone,José A.. |
| ABSTRACT Laboratory tests for technical evaluation or irrigation material testing involve the measurement of many variables, as well as monitoring and control of test conditions. This study, carried out in 2016, aimed at using statistical quality control techniques to evaluate results of dripper tests. Exponentially weighted moving average control charts were elaborated, besides capability indices for the measurement of the test pressure and water temperature; and study on repeatability and reproducibility (Gage RR) of flow measurement system using 10 replicates, in three work shifts (morning, afternoon and evening), with 25 emitters. Both the test pressure and water temperature remained stable, with “excellent” performance for the pressure adjustment... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dripper flow; Statistical process control; Repeatability and repro; Control charts; Stability and capability; For measurement process. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000900587 |
| |
|
|
| Paixão,Carla S. S.; Chrispin,Camila P.; Silva,Rouverson P. da; Girio,Lucas A. S.; Voltarelli,Murilo A.. |
| ABSTRACT The mechanized harvesting of soybean is a fundamental tool in the production process of this crop and, if not performed properly, it can result in severe mechanical damage to the seeds, causing significant losses at harvest, particularly due to reduced quality. Thus, this study aimed to evaluate the physical and physiological quality of soybean seeds at three speeds of the harvester, using statistical process control. The experiment was carried out in the municipality of Conceição das Alagoas, MG, Brazil, with three travel speeds: 4.5, 5.0 and 5.5 km h-1. The seed samples were collected at 20 min intervals for 3 h of operation, with a total of 9 samples for each speed. The evaluations were performed based on the following parameters: grain... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max (L.) Merrill; Mechanical damage; Vigor; Control charts. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000300214 |
| |
|
| |
| Registros recuperados: 14 | |
|
|
|
