Insights into distributed feature ranking

This version of the article: Bolón-Canedo, V., Sechidis, K., Sánchez-Maroño, N., Alonso-Betanzos, A., & Brown, G. (2019). ‘Insights into distributed feature ranking’ has been accepted for publication in: Information Sciences, 496, 378–398. The Version of Record is available online at https://doi.org/10.1016/j.ins.2018.09.045.[Abstract]: In an era in which the volume and complexity of datasets is continuously growing, feature selection techniques have become indispensable to extract useful information from huge amounts of data. However, existing algorithms may not scale well when dealing with huge datasets, and a possible solution is to distribute the data in several nodes. In this work we explore the different ways of distributing the data (by features and by samples) and we evaluate to what extent it is possible to obtain similar results as those obtained with the whole dataset. Trying to deal with the challenge of distributing the feature ranking process, we have performed experiments with different aggregation methods and feature rankers, and also evaluated the effect of distributing the feature ranking process in the subsequent classification performance.This research has been economically supported in part by the Spanish Ministerio de Economía y Competitividad and FEDER funds of the European Union through the research project TIN2015-65069-C2-1-R; and by the Consellería de Industria of the Xunta de Galicia through the research project GRC2014/035. Financial support from the Xunta de Galicia (Centro singular de investigación de Galicia accreditation 2016-2019) and the European Union (European Regional Development Fund - ERDF), is gratefully acknowledged (research project ED431G/01). V. Bolón-Canedo acknowledges support of the Xunta de Galicia under postdoctoral Grant code ED481B 2014/164-0.Xunta de Galicia; GRC2014/035Xunta de Galicia; ED431G/01Xunta de Galicia; ED481B 2014/164-

Design of a 35 kW Solar Cooling Demonstration Facility for a Hotel in Spain

[EN] Solar cooling systems have the advantage of the coincidence between the hours of cooling demand and the hours of solar radiation availability, and they can contribute to reduce the energy consumption in buildings. However, the high cost of thermal solar cooling facilities with absorption chillers, maintenance issues, legionella risk and water consumption (associated to the necessary cooling tower) have limited the use of these systems to demonstration projects. A simplified Transient System Simulation Tool (TRNSYS) model was developed to provide the owner of the demonstration facility the information he needs for design decision-making. This model was validated with experimental data registered in a solar cooling system designed and built by the authors. Different collector field surfaces, hot water storage tank volumes, and absorption machine driving temperatures were analyzed for a hotel demonstration facility. In terms of the energy delivered to the absorption chiller the optimum dimensioning corresponded to the lowest values of the driving temperature (75 °C) and specific storage volume (15 Lm2). From an economic point of view, the saving of 1515 euros per year when compared with an electric compression chiller does not compensate the investment of 3000 euros per kW of cooling capacity that cost the thermal solar cooling facility.This research was funded by (MINECO/AEI/FEDER, UE), grant number ENE2017-83729-C3-1-R.Martínez, PJ.; Martínez, P.; Soto Francés, VM.; Bujedo, LA.; Rodríguez, J. (2020). Design of a 35 kW Solar Cooling Demonstration Facility for a Hotel in Spain. Applied Sciences. 10(496):1-13. https://doi.org/10.3390/app10020496S1131049

Design development of machine shop area for the case TSF-8.171.137 manufacture including the study of cutting tool geometrical parameters influence on cutting force parameters

The thesis develops the design of machine shop area for manufacturing the case and researching the impact of cutting tool geometrical parameters on cutting force components and tool lifeCONTENTS INTRODUCTION 1. ANALYTIC CHAPTER 1.1. Service purpose and characteristics of the object of production. 1.2. Analysis of technical requirements for the part. 1.3. Analysis of the technological design of the part. 1.4. Analysis of the basic technological process. 1.5. Conclusions and problem statement for the diploma project. 2. SCIENTIFIC RESEARCH CHAPTER 2.1. Characterization of the cutting tool geometry. 2.2. Setting up the experimental criterias, technical and cutting conditions. 2.3. Research the experimental results of cutting-edge preparation and cutting-edge radius influences on tool life and cutting forces. 2.4. Research of edge treatment influence on total force load and component of cutting force Fz. 3. TECHNOLOGICAL CHAPTER 3.1. Characteristics of the type and organizational form of production. 3.2. Choice and justification of workpiece's obtaining method. 3.3. Requirements for the workpiece. Calculation of the workpiece. 3.4. Calculations of leakage to the surface of the part in an analytical way. 3.5. Development of routing technological process of mechanical processing of the body of TSF 8.171.137. 3.6. Methods of providing technological requirements in the processing of parts. 3.7. Description of the route process for operations. 3.8. Development of operational process. 3.8.1. Description of the trajectories of the motion of the cutting tool on the operations performed on CNC machines. 3.8.2. Selection of cutting and normalization of operations of the technological process. 3.8.2.1. Calculations of cutting and normalization modes of turning-threading operation 015. 3.8.2.2. Calculations of cutting and normalization modes of vertical milling operation 025. 3.8.2.3. Calculation of the cutting and normalization modes of coordinate-boring operation 045 with CNC. 3.9. Determination of errors of the base of the workpiece. 3.10. Calculations of the forces of fastening the workpiece. 3.11. Calculate the parts for durability. 4. DESIGNING CHAPTER 4.1. The choice of equipment, equipment and bases for the design version of the case. 4.2. Design of machine tool adaptation. 4.2.1. Description of the design and principle of the selected devices. 4.2.2. Assembly and operation of the device. 4.2.3. Choice and calculation of power drive. 4.3. Design of cutting and measuring tools. 4.3.1. Design of cutting tool. 4.3.2. Calculations of the measuring instrument. 4.4. Means of increasing the technological indicators of coordinate-boring operation 045 with CNC. 5. SPECIAL CHAPTER 5.1. Subsystems of optimization in CAD. 5.2. Review of the most common CAD of world manufacturers. 5.3. Methods of designing technological processes for manufacturing parts using the package of applied programs "CCI CAD". 5.3.1. Preparing the source information. 5.3.2. Block diagram of the algorithm for automated design of the process of manufacturing the case. 5.4. Analysis of the technological process, obtained with the help of CAD of the TP. 6. PLANNING CHAPTER 6.1. Determination of annual needs in technological equipment. Build summary hardware. 6.2. Selection of the type and calculation of the number of lifting and transport vehicles. 6.3. Calculation of the number of industrial and production personnel. 6.3.1. Monthly time fund estimates. 6.3.2. Calculations of the number of production workers. 6.3.3. Settlements of the number of auxiliary workers. 6.3.4. Calculations of the number of engineering workers and junior service staff. 6.4. Calculation of necessary production area and construction of site planning scheme. 7. ECONOMIC BACKGROUND 7.1. Determination of the technological cost of manufacturing the case. 7.1.1. Feasibility study of the method of obtaining the workpiece. 7.1.2. Determination of the wage fund of production workers and the magnitude of their average monthly earnings. 7.1.3. Overhead billing. 7.1.3.1. Calculation of total production costs. 7.1.3.2. Calculation of administrative expenses. 7.1.3.3. Calculations of sales expenses. 7.1.4. Calculations of full cost and price details. 7.2. Determination of economic efficiency of the design variant of the technological process of manufacturing the case with CNC machines. 7.2.1. Determination of output data for economical comparison of the basic and project variants of technology. 7.2.2. Determination of capital investments in comparable variants. 7.2.3. Determination of technological cost of annual production of parts in comparable variants. 7.3. Basic technical and economic indicators of the site. 7.4. Substantiation of economic efficiency of the developed technological process. 8. HEALTH AND SAFETY MEASURES 8.1. Organization of labor protection at work. 8.2. Dangerous production factors at the site and measures to reduce them. 8.3. Analysis of harmful production factors at the site and measures to eliminate them. 9. ECOLOGY 9.1. The relevance of environment protection. 9.2. Environmental pollution resulting from project implementation. 9.3. Measures to reduce the toxicity of exhaust gases, protect the environment and reduce environmental pollution. CONCLUSIONS REFERENCES APPENDICE

Application of kDNA as a molecular marker to analyse Leishmania infantum diversity in Portugal.

Around the Mediterranean basin Leishmania infantum is an important parasite causing canine leishmaniasis and visceral and cutaneous clinical forms in both immunocompetent and immunocompromised humans. Efficient monitoring and evaluation of epidemiology with discriminatory molecular markers are required. We investigated the genetic diversity of L. infantum in Portugal by polymerase chain amplification and restriction fragment length polymorphism analysis of kinetoplastid DNA, as molecular marker. We analysed 120 Portuguese isolates of L. infantum plus 16 other non-Portuguese isolates (as a reference group) from humans, dogs and sand flies. The Portuguese population showed a high degree of polymorphism with a total of 13 profiles identified. The predominant profile was A, which was only detected in the Portuguese samples. The kinetoplastid DNA PCR-RFLP assay described here was suitable for use directly with biological samples and the profiles obtained were stable during long-term growth in vitro and in laboratory animals

Design development of machine shop area for the cover KS6-57.017 manufacture including the study of the cutter micro geometrical deviations in cutting process by finite elements method

The thesis develops the design of machine shop area for manufacturing the cover and researching the deviations of micro geometrical parameters during the cutting process by finite elements methodCONTENTS INTRODUCTION 1. GENERAL-TECHNICAL CHAPTER 1.1. Primary objectives and characteristics of object of production. Technical analysis of product specification. 1.2. Characteristics of the workpiece material. Analysis of chemical and mechanical properties. part. 1.3. Analysis of part’s technological design. 1.4. Analysis of the basic technological process of manufacturing the 1.5. Modern achievements in the field of technology, machines and equipment in the manufacture of similar products. 1.6. Conclusions and problem statement for a diploma project. 2. SCIENTIFIC RESEARCH CHAPTER 2.1. Investigation of the factors that influence the change of the geometrical parameters of the cutting tool during the machining process. 2.2. Modeling of microgeometry of cutting tool by finite element method 2.3. The results of the study of the deviations of the microgeometry of the cutter in the cutting process 3. TECHNOLOGICAL CHAPTER 3.1. Determination of the type and organizational form of production. 3.2. Choosing a method for obtaining of workpiece. 3.3. Development of the technological process of processing the part. 3.4. Determination of allowances and interoperational sizes. 3.5. Calculation of cutting modes. 3.5.1. Calculation of the cutting modes for the internal cylindrical surface ø120mm, ø130mm, ø140mm. 3.5.2. Calculation of cutting modes for drilling 8 holes ø11mm. 3.6. Choice of cutting and measuring tools. 3.7. Characteristics of equipment. 3.7.1. Turning screw lathe 16K20. 3.7.2. Lathe multistage semi-automatic model of 1716 TS. 3.7.3. Diamond cutting machine OS2425. 3.7.4. Radial-drilling machine model 2M55. 3.8. Technical normalization of the developed technological process. 3.9. Choice of equipment and determination of its quantity. 4. DESIGNING CHAPTER 4.1. Jig for boring holes ø92Н8, ø120Н8, ø140Н8. 4.2. Conductor rotary for drilling 8 holes ø11M. 4.3. Jig for controlling radial beats. 5. SPECIAL CHAPTER 5.1. Structure and composition of CAD. 5.2. The main components and types of CAD information support. 5.3. Methodology of designing technological processes for manufacturing parts using a package of applied software of the CAD-CAM. 5.3.1. Preparing the source information. 5.3.2. Block diagram of the algorithm for automated design of the technological process. 5.4. Analysis of the technological process, obtained with the help of CAD of the TP. 6. PLANNING CHAPTER 6.1. Specification of production program. 6.2. Calculation of complexity and machine-tool manufacturing of products on the basis of developed technological processes. 6.3. Determination of the annual need for technological equipment. Compilation of equipment summary. 6.4. Determining the number of staff at the site. 6.6. Determining the basic dimensions and choosing the type and construction of the building. 6.5. Determining the size of the main and auxiliary areas of the shop. 6.7. Development of layout plan. 6.8. Elaboration of the layout of the equipment. 6.9. Development of technical specification for technological preparation of production. 7ECONOMIC BACKGROUND 7.1. Organization and efficiency of equipment repair at the site 7.2. Drawing up of network scheduling of works on the site. 7.3. Determination of the economic efficiency of the decisions taken in the project. 7.4. Basic technical and economic indicators of the site. 8. HEALTH AND SAFETY MEASURES 8.1. Measures to ensure safe working conditions of the equipment. 8.2. safety Electrical installation equipment for dust, fog, sewage treatment. 9.3. Assessment of environmental performance at the site of the machine shop for the manufacture of the cover. GENERAL CONCLUSIONS APPENDICES REFERENCE

Leishmania donovani populations in Eastern Sudan: temporal structuring and a link between human and canine transmission.

BACKGROUND: Visceral leishmaniasis (VL), caused by the members of the Leishmania donovani complex, has been responsible for devastating VL epidemics in the Sudan. Multilocus microsatellite and sequence typing studies can provide valuable insights into the molecular epidemiology of leishmaniasis, when applied at local scales. Here we present population genetic data for a large panel of strains and clones collected in endemic Sudan between 1993 and 2001. METHODS: Genetic diversity was evaluated at fourteen microsatellite markers and eleven nuclear sequence loci across 124 strains and clones. RESULTS: Microsatellite data defined six genetic subpopulations with which the nuclear sequence data were broadly congruent. Pairwise estimates of FST (microsatellite) and KST (sequence) indicated small but significant shifts among the allelic repertoires of circulating strains year on year. Furthermore, we noted the co-occurrence of human and canine L. donovani strains in three of the six clusters defined. Finally, we identified widespread deficit in heterozygosity in all four years tested but strong deviation from inter-locus linkage equilibrium in two years. CONCLUSIONS: Significant genetic diversity is present among L. donovani in Sudan, and minor population structuring between years is characteristic of entrenched, endemic disease transmission. Seasonality in vector abundance and transmission may, to an extent, explain the shallow temporal clines in allelic frequency that we observed. Genetically similar canine and human strains highlight the role of dogs as important local reservoirs of visceral leishmaniasis

Discovery of Very High Energy gamma-rays from 1ES 1011+496 at z=0.212

We report on the discovery of Very High Energy (VHE) gamma-ray emission from the BL Lacertae object 1ES1011+496. The observation was triggered by an optical outburst in March 2007 and the source was observed with the MAGIC telescope from March to May 2007. Observing for 18.7 hr we find an excess of 6.2 sigma with an integrated flux above 200 GeV of (1.58$\pm0.32) 10^{-11}$ photons cm$^{-2}$ s$^{-1}$. The VHE gamma-ray flux is >40% higher than in March-April 2006 (reported elsewhere), indicating that the VHE emission state may be related to the optical emission state. We have also determined the redshift of 1ES1011+496 based on an optical spectrum that reveals the absorption lines of the host galaxy. The redshift of z=0.212 makes 1ES1011+496 the most distant source observed to emit VHE gamma-rays up to date.Comment: 4 pages, 6 figures, minor changes to fit the ApJ versio

The Role of Provenance Management in Accelerating the Rate of Astronomical Research

The availability of vast quantities of data through electronic archives has transformed astronomical research. It has also enabled the creation of new products, models and simulations, often from distributed input data and models, that are themselves made electronically available. These products will only provide maximal long-term value to astronomers when accompanied by records of their provenance; that is, records of the data and processes used in the creation of such products. We use the creation of image mosaics with the Montage grid-enabled mosaic engine to emphasize the necessity of provenance management and to understand the science requirements that higher-level products impose on provenance management technologies. We describe experiments with one technology, the "Provenance Aware Service Oriented Architecture" (PASOA), that stores provenance information at each step in the computation of a mosaic. The results inform the technical specifications of provenance management systems, including the need for extensible systems built on common standards. Finally, we describe examples of provenance management technology emerging from the fields of geophysics and oceanography that have applicability to astronomy applications.Comment: 8 pages, 1 figure; Proceedings of Science, 201

Aerospace medicine and biology: A continuing bibliography with indexes

This bibliography lists 148 reports, articles and other documents introduced into the NASA scientific and technical information system in December 1984