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Machine learning is a tool that is being used to optimize highly complex industrial processes. In the plywood panel production industry, veneer drying is one of the most important processes as it allows to obtain high quality products. The biological nature and high structural variability of wood turns its industrial processing multivariate and difficult to control. The large number of variables present and the increasing possibility to measure them in real time are enabling the availability of a large amount of data. Nowadays, data-driven approach and Intelligence Artificial techniques, specifically Machine Learning can enable robust prediction and control approaches. In the process industry, with high levels of automation, it is possible to enable decision making to predict product quality by monitoring explanatory control variables. The objective of this work was to evaluate a Machine Learning algorithm capable of predicting the quality of the veneer drying process from a considerable number of input variables captured from a real industrial process. The Weka platform and Python code were used. Three algorithms were evaluated: K-Nearest-Neighbor, eXtreme Gradient Boosting and Support Vector Machine. Variable and dimensionality reduction, correlation analysis and Principal Component Analysis were performed. The results showed that eXtreme Gradient Boosting achieved an accuracy of 76 % in predicting quality scores. Finally, it is concluded that both the data engineering methodology and the evaluated algorithms were efficient in predicting industrial data. [ABSTRACT FROM AUTHOR]

Industry 4.0 has revolutionised the way industries around the world operate, enabling greater efficiency and process optimisation. However, for many in developing countries, such as Cuba, the cost of implementing advanced technologies can be a significant challenge. In this context, the Velkys controller, developed by the company AlaSoluciones, is presented as a low-cost solution to boost the development of Industry 4.0 in the country. The aim of this article is to demonstrate the capabilities of the Velkys controller, presenting the hardware and software development of the device. The main element used is the ESP32 microcontroller, which provides wireless connection via Wifi and Bluetooth, as well as powerful processing capabilities. The controller firmware is based on the real-time operating system (FreeRTOS), ensuring efficient and reliable operation. This solution simplifies the transition to Industry 4.0 in contexts where the level of risk associated with the process is not extreme, such as in light manufacturing and agribusiness, among others, representing a viable and economical alternative to promote automation in Cuban industry. [ABSTRACT FROM AUTHOR]

Copyright of Revista Venezolana de Gerencia (RVG) is the property of Revista de Filosofia-Universidad del Zulia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Técnica Industrial: Revista Cuatrimestral de Ingeniería, Industria e Innovación is the property of Fundacion Tecnica Industrial and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In Ecuador, cassava production is one of the three raw materials with the highest annual growth rate, to get into the snacks market, it is necessary to maintain competitive products and prices due to the high supply. This study search how to relate the needs and expectations of customers with the design requirements of cassava snacks to increase the productivity and competitiveness of the company through the methodology of continuous improvement or quality function deployment. The 384 surveys were conducted and through the Likert measurement it was evidenced that there are variables such as flavor, standards fulfillment and texture. Where the technical solutions are related to the quality of the starchy vegetable and processes like frying time controlled by the quality department. The selection of the product characteristics over the competition through arrays was guaranteed and the demand for the product and sales revenues were increased. [ABSTRACT FROM AUTHOR]

Introduction: Biofloc technology is a bioremediation process that allows minimizing the exchange of water and its use in aquaculture systems. Objective: to present trends in scientific publications about Biofloc technology for fish production, using bibliometric analysis tools. Materials and methods: the Web of Science database was used, with a search equation and information processing supported by the BibExcel and VOSviewer tools. A systematic analysis was carried out on the recovered documents, considering type of culture, experimental time, growth and protein yield, population density, water quality, microbiological and physiological characteristics of the crop. Categories were determined in which the studies related to technology and the main challenges identified in the application of technology are defined. Results: 258 documents were found, 94.12 % corresponded to research articles. Productivity was higher in 2014 and 2016. The Federal University of Santa Catarina and Federal University of Rio Grande FURG in Brazil have the highest production. In co-authorship, 18 nodes were identified. 59.3 % of the documents reported investigations with shrimp and 18.99 % with tilapia. The best production times were in the ranges of 41-50 days (12.4 %), 21-30 days (11.24 %) and 51-60 days (9.68 %). The C:N ratio was not reported in 92.6 % of the studies. However, 3.48 % reported ratios of 15:1 and 1.16 % of 20:1. The main categories were performance (44.18 %) and productivity (26.35 %). Conclusions: Biofloc technology represents an opportunity for sustainability in species aquaculture practices. A gradual growth in research processes was evidenced in recent years; the main studies are related to the performance in terms of growth and optimization of the protein conversion processes in the analyzed crops, whether individual or in polyculture. [ABSTRACT FROM AUTHOR]

The automotive industry has become more demanding in terms of quality over the years, as processes require greater precision and better control in order to meet customer requirements. The present work shows the case of the implementation of the DMAIC methodology in a company in the automotive sector, specifically in a disc machining plant, which is one of the most critical and important processes in the sector, since it is where they are perfected. the pieces, adapting to the characteristics that the client requests. The part number that was worked with is the D170X, a model belonging to the FCA client. The objective of the continuous improvement project is to reduce customer complaints, which are reflected in quality alerts. In order to reduce these alerts, it is proposed to reduce the defects found in the pieces, which are made in the drilling operation since holes are out of phase and out of specifications. In the present work, the DMAIC (Define, Measure, Analyze, Implement and Control) methodology was developed to reduce defects by attacking them from the root and increase the Six Sigma level, in addition to being supported by the FMEA (Mode and Effect Analysis) to identify possible failures and determine how to correct and prevent them. After the development and implementation of the DMAIC methodology, favorable changes were evidenced in the process, with quality being paramount and therefore the client is in accordance with their requirements. [ABSTRACT FROM AUTHOR]

Copyright of Ad-gnosis is the property of Ad-gnosis Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The process of the opening the Colombian capital market has made possible to increase the investment regime of Pension Funds and gives them more responsibility to the Pension Fund Managers to be more efficient with the resources of the contributors. Due to a new investment vehicles, the Superintendencia Financiera de Colombia (sfc) has determined the universe of admissible assets of these portfolios and it has imposed restrictions/limits on certain investments. Regarding the process of the portfolio optimization, few studies have been used the classic mean-variance analysis and some alternatives such as the maximum drawdown criterion. It is important to continue assessing the efficiency of portfolios considering new approaches to establish the best structural strategy. This document considers the Most Diversified Portfolio (mdp) method for the selection of assets within a pension portfolio, understood as a guide for the establishment of the investment strategy of the Pension Fund Managers, based on the concept of diversification and exploring an alternative approach to the classical theory of mean-variance. [ABSTRACT FROM AUTHOR]

Copyright of Revista Ciencia y Poder Aéreo is the property of Escuela de Postgrados de la Fuerza Aerea Colombiana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this study, a reactive distillation column for production of isopropanol was investigated. Firstly, a dynamic model was developed for the process. The model of the process was then programmed, and the process simulated using a base case obtained from the literature. Results showed that distillate contained more than 58 mol% propylene-free isopropanol. In the next step, optimization of some operating variables was performed to maximize concentration of isopropanol in distillate with condenser temperature as constraint, which was considered to be above the freezing point of water. Several simulations were performed by changing operating parameters, and finally optimum isopropanol content in distillate was obtained above 58 mol%. Results of using classic controllers showed that PID controller had the best performance for both condenser temperature set-point tracking and disturbance rejection. [ABSTRACT FROM AUTHOR]

The portfolio process of optimization search for the best portfolio through the risk measures and return, Markowitz model has worked on that selection under median-variance portfolio, that model has been criticized because it is based on historic information, leaving some aspects unaccounted for, such as the state of the market, lower diversification, among others; in order to improve this model, Fischer Black and Robert Litterman provided information about financial assets assignment based on the assumption of the equilibrium and the investor opinion concerning the future investment asset. Because of the uncertainty in the optimization process, it is proposed to make the use of fuzzy techniques for its treatment. This article is the result of the Master Degree in Finances, "Aplication of fuzzy techniques to the selection's model of the Black-Litterman portfolio: Colombian Case Coleqty index" that evaluate the optimization process of contributions of portfolio in Black-Litterman Model, based on diffuse techniques in stocks of Coleqty index of Colombia, resulting risk-return base on triangular and trapezoidal functions, obtaining some different portfolios concerning with diversification, it will be compared with Sharpe, Treynor and Jensen's Alpha performance indicators, portfolio with best return and less risk will be important, in order to choose the best optimization process, Black-Litterman classic or Black Litterman fuzzy techniques. [ABSTRACT FROM AUTHOR]

Copyright of Lecturas de Economia is the property of Universidad de Antioquia, Facultad de Ciencias Economicas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Investigación e Innovación en Ingenierías is the property of Universidad Simon Bolivar and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A liquid dye was obtained from Malay apple pulp (Syzygium malaccense [L.] Merr. et Perry) rich in anthocyanins and polyphenols. For this, the process of hydroalcoholic extraction was optimized according to the extraction yields of anthocyanins and total polyphenols. The optimal extraction conditions corresponded with 60% ethanol, 24 h as extraction time, a solid/liquid ratio of 1 g for 5 mL and 60 °C. The hydroalcoholic extract of Malay apple showed yield values of total polyphenols (53.7%) and anthocyanins (25.1%), similar to those estimated by the numerical optimization of the process. The liquid dye showed no acute oral toxicity at a dose of 2 g/kg in the experimental animals; exhibited a content of 1667 mg/L total phenols and 59 mg/L anthocyanins, with a pH of 2.6. [ABSTRACT FROM AUTHOR]

Copyright of CULCyT: Cultura Científica y Tecnológica is the property of Cultura Cientifica y Tecnologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

With the advance and necessary implementation of technology nowadays, new challenges come along for educational centers. Undoubtedly, the most important ones in terms of taking ad-vantage of technologies for the optimization of processes, involve the identification of the equipment and the tools that are adapted to their own requirements or needs; exploring the possibilities for the management and streamlining of processes, and making a rational and planned use of them. For this reason, the aim of this paper is to review a case of application of information and communication technologies (ICT) in the administrative area of a higher education institution, by means of a management system oriented to the structuring of academic pro-grams. The methodological strategy that was used for this research was of one of descriptive and exploratory nature, so that the areas of greatest problem for teachers could be identified and alternative solutions could be generated. Thus, it was concluded that the automation of teacher planning processes represents an area of opportunity for improvement in administrative management, to the extent that it decreases delivery times and improves teacher performance, and keeps not only the staff updated in the use of ICTs, but also the processes of the in-situation. [ABSTRACT FROM AUTHOR]

A comparative analysis of the portfolio optimization processes is presented using the Kelly criterion under an uncoupled nonlinear function, that is, when the profitability function for a multi-asset portfolio is defined as a nonlinear function of the fraction of total capital. that is assigned in each investment. The comparison elements are the levels of profitability and risk in the two portfolios (a portfolio obtained by applying the Markowitz model versus a portfolio applying the Kelly criterion) in a defined time horizon. [ABSTRACT FROM AUTHOR]

Copyright of Revista Técnica Energía is the property of Centro Nacional de Control de Energia CENACE and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper presents an algorithm using CSi Application Programming Interface (CSi API), which allows the automation of the structural optimization process for plane frames, linking powerful computational tools such as SAP2000v16 and Matlab. In addition, aspects usually ignored in modelling and structural analysis for structural optimization are included, such as the influence of cracking of concrete elements in their stiffness and the inclusion of a second order analysis. On the other hand, due to the complexity of the objective function, it was necessary to use metaheuristic optimization methods: a hybridization between genetic algorithms and the Nelder-Mead algorithm, instead of the classical methods used in previous studies, obtaining satisfactory results. The results are expressed in the form of design recommendations and they are compared with those obtained in previous investigations. [ABSTRACT FROM AUTHOR]

one of the techniques to treat oil from oil wells is to use oil treatment trains to separate the three existing phases: gas, oil, and water. One of the equipments that make up the train is the three-phase separator. This work demonstrates the feasibility of using a hierarchical control scheme for an online setting of optimal pressure and temperature setpoints and thus reducing energy consumption in the heat treater. So that the manipulated variables and the set points are within the limits of the safe operation, with this provides an economic and environmental benefit for this plant. The achievement of this optimization is the main contribution of this work. For the development of this work we designed an optimization algorithm based on three hierarchical layers where the first layer refers to direct control (PIDs), the second layer refers to the optimization of steady state objectives (SSTO), the third layer refers to local optimization of objectives (LSSO). For the solution to this problem, we resorted to solutions of linear optimization and nonlinear optimization these algorithms are related to the linearized model of the plant, in other works are usually based on the theory MPC (Predictive Control Model). The simulation of the algorithms was done in Matlab and tested in a simulated plant in Hysys using the Active x server connector that connects the two software. In this experiment, it was possible to save 30% of energy consumption. In turn, it was found that it is possible to relate the plant model with the linear and non-linear optimization algorithms, which concluded that the implementation of these algorithms is feasible in this type of plant for process optimization. [ABSTRACT FROM AUTHOR]

Copyright of Desarrollo Gerencial is the property of Universidad Simon Bolivar (USB) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Técnica Energía is the property of Centro Nacional de Control de Energia CENACE and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Daena: International Journal of Good Conscience is the property of Spenta University Mexico and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The identification of productive plants with fruits of desirable characteristics contributes to the optimization of commercial crops of red mombin fruits. The aim of this work was to evaluate the genetic diversity among the provenance of red mombin of two municipalities of the state of Goiás. The fruits were harvested at ripening stage 3 and transported to the laboratory. The treatments were composed of fruits harvested from three plants, being ten repetitions and five fruits per experimental plot, totaling fifty fruits per provenance. Considering each repetition as an individual, 15 individuals were evaluated for length, diameter, weight, color attributes of the pericarp and pulp, soluble solids content and titratable acidity of the pulp, ratio of soluble solids content and acidity, and vitamin C content of the pulp. The results were subjected to descriptive analysis. A multivariate analysis was performed estimating the mean Euclidean distance obtained from the provenances, based on the attributes of the fruits analyzed. The measure of similarity and grouping of the provenances were done through the Tocher optimization algorithm and UPGMA dendrogram. The variables contributed similarly to dissimilarity. The Tocher method grouped the individuals into four groups, while in the UPGMA dendrogram, seven groups were formed. [ABSTRACT FROM AUTHOR]

The objective of this research was to evaluate the effect of enrichment in cookies with tarwi oil (X1) and chia seeds (X2) in their technological and sensorial characteristics, for which an experimental planning of process optimization by response surface was used. a rotational compositional central design (DCCR) 22 giving a total of 11 treatments, being the levels of X1 (4; 6; 9; 12; 14%) and X2 (2; 3; 6; 9; 10%) and a control (F0) made with wheat flour without any substitution in the formulation. The technological characteristics evaluated were: fatty acid composition (GC), instrumental texture and color by the CIELab method. The results show that X1 improves color and hardness, while Omega 6 fatty acid, Omega 3 fatty acid and fracturability had significant influence by both factors (X1, X2). For the sensory evaluation, a test with a hedonic scale was applied to 20 semi-trained panelists, only taste was evaluated. The cookies with the highest X1 had the highest score. The optimal formulation within the ranges studied was F3 (12% X1 and 3% X2) (7.72% omega 3 fatty acid, 37.54% omega 6 fatty acid, and acceptability of 6.58 on a 7-point scale). [ABSTRACT FROM AUTHOR]

Copyright of Revista Ciencia Administrativa is the property of Universidad Veracruzana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Process mining aims to discovering, monitoring and improving process, starting from events logged during process execution on information systems. Nevertheless, available process mining techniques for process diagnosis offer insufficient information about event log completeness or infrequent process behavior, affecting process comprehension. A new technique, named Variants Miner is presented, starting from limitations of process mining techniques regarding process comprehension. This technique aims to construct different variants of process models through process decomposition on sub-processes. An application of Variants Miner and other techniques in a real environment is presented. The obtained results show that the proposal decreases the cognitive load of the model and improve the fitness, generalization and precision, considering missing information and noise, improving process comprehension on process diagnosis stage. [ABSTRACT FROM AUTHOR]

Crushing mathematical modeling using particles population balance method is a fundamental tool for process analysis, optimization and design. This paper deals with the evaluation of the fracture events and process in cone and rolls crushers. For that proposes, is taken as reference Whiten (1972) structural model modifying fragmentation distribution function. This function was replaced by Austin and Luckie (1972) expression. For model development, was created an algorithm using Matlab 13a like determining resource of fractures parameters. Model estimated error for evaluated crushers established the viability of its use for modelling and simulation, particularly for rolls crushers that even before were simulated by simple fragmentation models. Classification and fragmentation distribution functions obtained, describe the events and process fracture essentials that take place in both crushers. [ABSTRACT FROM AUTHOR]

This article propose apply a Virtual Classroom denominated LMS as a technological tool for transferring Knowledge to Workers of Plastigar company about processes and procedures industrial production plastic bags manufactured there. To carry out this proposal, was performed a research quantitative with descriptive analysis, applied to the problems exposed by the company Plastigar SAS on non-compliance of quality requirements and delivery times of orders, the result revealed the absence of a training plan given the logistics, the complexity required and the impact for the de laborization of employees. In the study the applicability of various technological tools against criteria of cost, type of learning, and self-know, required by Plastigar S.A.S was assessed.; As a result, it was concluded that the tool that best fits these characteristics and therefore is suggested is LMS (Learning Management System) a virtual classroom with content to facilitate understanding and memory of the production process without affecting the production line. [ABSTRACT FROM AUTHOR]

In diversification, an attractive variant constitutes the projection of ethanol plants due to all the advantages that this represents and a crucial element for this to be effective is the existence of cane as a fundamental raw material for the sugar industry and therefore the derived productions. To project the initials optimal capacity of the plant, uncertainty in the raw material was considered. Mathematical models of capacity in time are obtained, choosing those that best fit, being the linear the simplest for future calculations. The initial capacity the plant should have is determined, also the time at which the first extension and the capacity of the plant should be done, which allows, considering other criteria, to make decisions about what should be the capacity of an ethanol plant in response to the current and future availability of sugar cane. It is presented a general method that can be used considering other tax sugar companies in a province or a region. [ABSTRACT FROM AUTHOR]

In Cuba, powder detergent production is carried out by a single factory. This work research was intended to evaluate the powder detergent production process from a simulation process. For this purpose, the HYSYS v. 3.2 chemical process simulator was employed and definition of properties of hypothetical components that are nor part of the pure components database was required. Results of the basic case showed inefficiencies of the process operation, the most important being during the neutralization stage and the drying gas heating stage. Results of Study Case 2 show that it is possible to reduce pH of the neutral paste to 15.34% when compared to the basic case, for a production of 848 kg neutral paste per hour, without affecting the percentage of the active ingredient. Additionally, a decreased consumption of liquefied gas of 1,500 L/d implies increased profit in the amount of $ 227,301 per year, compared to the basic case. [ABSTRACT FROM AUTHOR]

The yield and quality of cotton fiber obtained in the ginning process, determine the income for the farmer, the gin productivity and performance of the fiber in the process of industrialization. In this research, it was designed and programmed a hybrid metaheuristic between the simulated annealing (SA) and swarm particle (PSO) applied to a nonlinear regression model that predicts the performance of cotton fiber, made from cotton seed in ginning. To develop the model, input and process inherent to the conditions and factors to the 707 batches of seed cotton were analyzed during harvest ginning between 2009 and 2010, to which a total of 9 variables were considered (six and three binary integer), the development of this model allows to evaluate the expected performance and productivity set margins for farmers and for ginning enterprises. It was shown, that the seed cotton yield is adversely affected by such factors as: the variety of batch humidity as well as filth level, temperature levels applied in clean fibers process. [ABSTRACT FROM AUTHOR]

The use of the membrane bioreactors (MBR) has gained an important place in the treatment of urban and industrial wastewater in the last years, due mainly to their advantages over conventional processes of wastewater treatment, such as: higher quality of treated water, less environmental impact if compare with other processes, and better process control. In this work, an analysis of the modelling evolution of such complex systems is presented. The advances in last years in modeling biological and filtration systems in MBR are discussed. The importance of Computational Fluids Dynamics in the study of systems functioning, specifically in the modelling of membrane fouling process is underlined. The current trend to use models that integrate biological degradation with the hydrodynamic and membrane filtration process, achieving a more phenomenological description of the MBR functioning is explained. Finally, the importance of integrated models in the optimization of the MBR functioning with a considerable saving of resources and time is described. [ABSTRACT FROM AUTHOR]

This paper presents a model for the integrated management of maintenance, taking into account features of continuous improvement over time. As an introduction and contextualization, it explains the importance of aligning organizational goals at all levels in order to achieve proper integration and management of the maintenance unit. The present model consists of seven main stages, which must be progressively implemented depending on the current scenario of the organization, focusing on management and sustained over time optimization of processes related to planning, programming and maintenance execution. Additionally, the model presented is supported by tools to develop and implement the stages, and provides a real operational context of the industrial maintenance management; which may affect performance. Finally, we present some general considerations and conclusions. [ABSTRACT FROM AUTHOR]

Copyright of Revista Facultad de Ingeniería - UPTC is the property of Universidad Pedagogica y Tecnologica de Colombia, Facultad de Ingenieria and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper studied an ant colony optimization algorithm with upper and lower pheromone limits called the Max-Min Ant System is applied to solve the single machine scheduling problem with sequence dependent setup times and makespan minimization. The study presents and compares three variants of the algorithm based on the pheromone update applied to a set of problems of size 100 jobs. The algorithms variants are compared between them and with a constructive greedy heuristic of the best neighbor. We conclude that adequate modifications to the pheromone actualization strategy improve significantly the solution quality, obtaining solution near the optimum due to the average differences less than 1% with respect to a lower bound of the makespan. [ABSTRACT FROM AUTHOR]

Copyright of Revista Cubana de Ciencias Informáticas is the property of Universidad de las Ciencias Informaticas (UCI) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ciencia y Sociedad is the property of Ciencia y Sociedad and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The operation of reception has an impact on productivity and on the client´s satisfaction, hence the necessity of making it work well. Objective.To introduce the state of the art and develop a proposal to implement a discrete simulation model and an experimental design, in order to improve the reception operation in the management of the storage of a finished product, including a case of operation in a mid size mattress factory from Medellín. Materials and Methods. A methodology focus is designed for the use of the discrete simulation and the experimental design in the reception operation, contributing to the state of the art. Results.The capability of the methodology and of the application case to improve the reception operation was identified and verified, because the media time required was reduced from 30 to 5 minutesand the efficiency in the modeling improved, due to the fact that the experimental model allowed a focus on the factors that affected the variable of interest. [ABSTRACT FROM AUTHOR]

Copyright of Arquiteturarevista is the property of Universidade do Vale do Rio dos Sinos and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ciencia y Sociedad is the property of Ciencia y Sociedad and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

El artículo discurre sobre la importancia de observar y determinar los elementos que causan estancamiento los procesos empresariales. El autor comenta sobre las dificultades de encontrar estos procesos que impiden el éxito, los cuales son referidos en el artículo como la vaca. También se considera el rol de los gerentes en estos procesos de control de calidad.

El artículo presenta una entrevista con Marcelo Lanfranconi, emprendedor de la empresa Paganza. Comenta sobre el modelo de negocios conocido como Lean Startup, el cual enfatiza la eficiencia. También discurre sobre el estado actual del mercado del emprendimiento en Uruguay y describe los retos asociados con el comienzo de un nueva empresa.