WorldWideScience

Sample records for hst se software

  1. The Planning and Scheduling of HST: Improvements and Enhancements since Launch

    Science.gov (United States)

    Taylor, D. K.; Chance, D. R.; Jordan, I. J. E.; Patterson, A. P.; Stanley, M.; Taylor, D. C.

    2001-12-01

    The planning and scheduling (P&S) systems used in operating the Hubble Space Telescope (HST) have undergone such substantial and pervasive re-engineering that today they dimly resemble those used when HST was launched. Processes (i.e., software, procedures, networking, etc.) which allow program implementation, the generation of a Long Range Plan (LRP), and the scheduling of science and mission activities have improved drastically in nearly 12 years, resulting in a consistently high observing efficiency, a stable LRP that principal investigators can use, exceptionally clean command loads uplinked to the spacecraft, and the capability of a very fast response time due to onboard anomalies or targets of opportunity. In this presentation we describe many of the systems which comprise the P&S ("front-end") system for HST, how and why they were improved, and what benefits have been realized by either the HST user community or the STScI staff. The systems include the Guide Star System, the Remote Proposal Submission System - 2 (RPS2), Artificial Intelligence (AI) planning tools such as Spike, and the science and mission scheduling software. We also describe how using modern software languages such as Python and better development practices allow STScI staff to do more with HST (e.g., to handle much more science data when ACS is installed) without increasing the cost to HST operations.

  2. The European HST Science Data Archive. [and Data Management Facility (DMF)

    Science.gov (United States)

    Pasian, F.; Pirenne, B.; Albrecht, R.; Russo, G.

    1993-01-01

    The paper describes the European HST Science Data Archive. Particular attention is given to the flow from the HST spacecraft to the Science Data Archive at the Space Telescope European Coordinating Facility (ST-ECF); the archiving system at the ST-ECF, including the hardware and software system structure; the operations at the ST-ECF and differences with the Data Management Facility; and the current developments. A diagram of the logical structure and data flow of the system managing the European HST Science Data Archive is included.

  3. PySE: Software for extracting sources from radio images

    Science.gov (United States)

    Carbone, D.; Garsden, H.; Spreeuw, H.; Swinbank, J. D.; van der Horst, A. J.; Rowlinson, A.; Broderick, J. W.; Rol, E.; Law, C.; Molenaar, G.; Wijers, R. A. M. J.

    2018-04-01

    PySE is a Python software package for finding and measuring sources in radio telescope images. The software was designed to detect sources in the LOFAR telescope images, but can be used with images from other radio telescopes as well. We introduce the LOFAR Telescope, the context within which PySE was developed, the design of PySE, and describe how it is used. Detailed experiments on the validation and testing of PySE are then presented, along with results of performance testing. We discuss some of the current issues with the algorithms implemented in PySE and their interaction with LOFAR images, concluding with the current status of PySE and its future development.

  4. Two-Gyro Pointing Stability of HST measured with ACS

    Science.gov (United States)

    Koekemoer, Anton M.; Kozhurina-Platais, Vera; Riess, Adam; Sirianni, Marco; Biretta, John; Pavlovsky

    2005-06-01

    We present the results of the pointing stability tests for HST, as measured with the ACS/ HRC during the Two-Gyro test program conducted in February 2005. We measure the shifts of 185 exposures of the globular clusters NGC6341 and Omega Centauri, obtained over a total of 13 orbits, and compare the measured pointings to those that were commanded in the observing program. We find in all cases that the measured shifts and rotations have the same level of accuracy as those that were commanded in three-gyro mode. Specifically, the pointing offsets during an orbit relative to the first exposure can be characterized with distributions having a dispersion of 2.3 milliarcseconds for shifts and 0.00097 degrees for rotations, thus less than 0.1 HRC pixels, and agree extremely well with similar values measured for comparable exposures obtained in three-gyro mode. In addition, we successfully processed these two-gyro test data through the MultiDrizzle software which is used in the HST pipeline to perform automated registration, cosmic ray rejection and image combination for multiple exposure sequences, and we find excellent agreement with similar exposures obtained in three-gyro mode. In summary, we find no significant difference between the quality of HST pointing as measured from these two-gyro test data, relative to the nominal behavior of HST in regular three-gyro operations.

  5. Technical Consultation of the Hubble Space Telescope (HST) System Health Assessment: Analysis of HST Health

    Science.gov (United States)

    Gentz, Steven J.; Heard, Brent N.; Hodson, Robert F.; Pettit, Duane H.; Pandolf, John E.; Azzolini, John D.; Dennehy, Cornelius J.; Farley, Rodger E.; Kirchman, Frank J.; Spidaliere, Peter D.

    2005-01-01

    The NESC conducted an abridged independent examination of available information and personnel interviews to evaluate the current and anticipated state of the spacecraft subsystems and the parameters that describe the HST's health. These examinations included the projected timeliness of a robotic SM and whether the GSFC baseline concept is likely to provide the capability to extend the useful scientific life of the HST by an additional 5 years. The NESC team collected a broad spectrum of pertinent HST Program analyses, reports, briefings, and the results of the IPAO and the Aerospace Corporation AOA assessments as they relate to the degradation of the HST s health. This review included the state of the HST subsystems having the potential to impact the viability of the HST, but will not be serviced under the baseline robotic SM.

  6. Imaging Variable Stars with HST

    Science.gov (United States)

    Karovska, M.

    2012-06-01

    (Abstract only) The Hubble Space Telescope (HST) observations of astronomical sources, ranging from objects in our solar system to objects in the early Universe, have revolutionized our knowledge of the Universe its origins and contents. I highlight results from HST observations of variable stars obtained during the past twenty or so years. Multiwavelength observations of numerous variable stars and stellar systems were obtained using the superb HST imaging capabilities and its unprecedented angular resolution, especially in the UV and optical. The HST provided the first detailed images probing the structure of variable stars including their atmospheres and circumstellar environments. AAVSO observations and light curves have been critical for scheduling of many of these observations and provided important information and context for understanding of the imaging results of many variable sources. I describe the scientific results from the imaging observations of variable stars including AGBs, Miras, Cepheids, semiregular variables (including supergiants and giants), YSOs and interacting stellar systems with a variable stellar components. These results have led to an unprecedented understanding of the spatial and temporal characteristics of these objects and their place in the stellar evolutionary chains, and in the larger context of the dynamic evolving Universe.

  7. Avaliação de alunos e professores acerca do software "Sinais Vitais" Evaluación de estudiantes y profesores acerca del software "señales vitales" Evaluation of students and teachers concerning the "vital signs" software

    Directory of Open Access Journals (Sweden)

    Marcos Venícios de Oliveira Lopes

    2004-12-01

    Full Text Available Este artigo teve por objetivo levantar as opiniões de alunos e professores sobre o software "Sinais Vitais". O trabalho foi desenvolvido no Departamento de Enfermagem da Universidade Federal do Ceará. Trabalhou-se com um total de seis alunos e três professores, os quais foram submetidos a uma entrevista após a utilização do software. As entrevistas geraram dez categorias, as quais foram separadas em dois temas: Características que estimularam a utilização do software "Sinais Vitais" e Software educacionalmente correto. Concluiu-se que os professores valorizaram a correção do conteúdo, enquanto os alunos enfocaram mais a dinâmica do programa.Este artículo tuvo por objetivo levantar las opiniones de alumnos y profesores sobre el software "Señales Vitales". El trabajo fue desarrollado en el Departamento de Enfermería de la Universidad Federal de Ceará. Se trabajó con un total de 6 alumnos y 3 profesores, los cuales fueron sometidos a una entrevista después de la utilización del software. Las entrevistas generaron 10 categorías, que fueron separadas en dos temas: Características que estimularon la utilización del software "Señales Vitales"; y software educativamente correcto. Se concluyó que los profesores valoraron la corrección del contenido, mientras que los alumnos enfocaron más la dinámica del programa.This article had for objective to get students' and teacher's opinions about "Vital Signals" software. The investigation was developed in the Nursing Department of the Federal University of Ceará. The sample population was a total of 6 students and 3 teachers, who were submitted to an interview after using the software. The interviews generated 10 categories, which were separated in two themes: Features which stimulated the use of the "Vital Signals" software; and software educationally correct. The results showed that the teachers valued the correction of the content, while the students focused more on the dynamics

  8. Io's Active Eruption Plumes: Insights from HST

    Science.gov (United States)

    Jessup, K. L.; Spencer, J. R.

    2011-10-01

    Taking advantage of the available data, we recently [10] completed a detailed analysis of the spectral signature of Io's Pele-type Tvashtar plume as imaged by the HST Wide Field and Planetary Camera 2 (HST/WFPC2) via absorption during Jupiter transit and via reflected sunlight in 2007, as well as HST/WFPC2 observations of the 1997 eruption of Io's Prometheus-type Pillan plume (Fig. 1). These observations were obtained in the 0.24-0.42 μm range, where the plumes gas absorption and aerosol scattering properties are most conspicuous. By completing a detailed analysis of these observations, several key aspects of the reflectance and the absorption properties of the two plumes have been revealed. Additionally, by considering the analysis of the HST imaging data in light of previously published spectral analysis of Io's Prometheus and Pele-type plumes several trends in the plume properties have been determined, allowing us to define the relative significance of each plume on the rate of re-surfacing occurring on Io and providing the measurements needed to better assess the role the volcanoes play in the stability of Io's tenuous atmosphere.

  9. APT, The Phase I tool for HST Cycle 12

    Science.gov (United States)

    Blacker, Brett S.; Bertch, Maria; Curtis, Gary; Douglas, Robert E., Jr.; Krueger, Anthony P.

    2002-12-01

    In the continuing effort to streamline our systems and improve service to the science community, the Space Telescope Science Institute (STScI) is developing and releasing, APT The Astronomer’s Proposal Tool as the new interface for Hubble Space Telescope (HST) Phase I and Phase II proposal submissions for HST Cycle 12. APT, was formerly called the Scientist’s Expert Assistant (SEA), which started as a prototype effort to try and bring state of the art technology, more visual tools and power into the hands of proposers so that they can optimize the scientific return of their programs as well as HST. Proposing for HST and other missions, consists of requesting observing time and/or archival research funding. This step is called Phase I, where the scientific merit of a proposal is considered by a community based peer-review process. Accepted proposals then proceed thru Phase II, where the observations are specified in sufficient detail to enable scheduling on the telescope. In this paper, we will present our concept and implementation plans for our Phase I development and submission tool, APT. More importantly, we will go behind the scenes and discuss why it’s important for the Science Policies Division (SPD) and other groups at the STScI to have a new submission tool and submission output products. This paper is an update of the status of the HST Phase I Proposal Processing System that was described in the published paper “A New Era for HST Phase I Development and Submission.”

  10. 3D-HST WFC3-selected Photometric Catalogs in the Five CANDELS/3D-HST Fields: Photometry, Photometric Redshifts, and Stellar Masses

    Science.gov (United States)

    Skelton, Rosalind E.; Whitaker, Katherine E.; Momcheva, Ivelina G.; Brammer, Gabriel B.; van Dokkum, Pieter G.; Labbé, Ivo; Franx, Marijn; van der Wel, Arjen; Bezanson, Rachel; Da Cunha, Elisabete; Fumagalli, Mattia; Förster Schreiber, Natascha; Kriek, Mariska; Leja, Joel; Lundgren, Britt F.; Magee, Daniel; Marchesini, Danilo; Maseda, Michael V.; Nelson, Erica J.; Oesch, Pascal; Pacifici, Camilla; Patel, Shannon G.; Price, Sedona; Rix, Hans-Walter; Tal, Tomer; Wake, David A.; Wuyts, Stijn

    2014-10-01

    The 3D-HST and CANDELS programs have provided WFC3 and ACS spectroscopy and photometry over ≈900 arcmin2 in five fields: AEGIS, COSMOS, GOODS-North, GOODS-South, and the UKIDSS UDS field. All these fields have a wealth of publicly available imaging data sets in addition to the Hubble Space Telescope (HST) data, which makes it possible to construct the spectral energy distributions (SEDs) of objects over a wide wavelength range. In this paper we describe a photometric analysis of the CANDELS and 3D-HST HST imaging and the ancillary imaging data at wavelengths 0.3-8 μm. Objects were selected in the WFC3 near-IR bands, and their SEDs were determined by carefully taking the effects of the point-spread function in each observation into account. A total of 147 distinct imaging data sets were used in the analysis. The photometry is made available in the form of six catalogs: one for each field, as well as a master catalog containing all objects in the entire survey. We also provide derived data products: photometric redshifts, determined with the EAZY code, and stellar population parameters determined with the FAST code. We make all the imaging data that were used in the analysis available, including our reductions of the WFC3 imaging in all five fields. 3D-HST is a spectroscopic survey with the WFC3 and ACS grisms, and the photometric catalogs presented here constitute a necessary first step in the analysis of these grism data. All the data presented in this paper are available through the 3D-HST Web site (http://3dhst.research.yale.edu).

  11. 3D-HST WFC3-SELECTED PHOTOMETRIC CATALOGS IN THE FIVE CANDELS/3D-HST FIELDS: PHOTOMETRY, PHOTOMETRIC REDSHIFTS, AND STELLAR MASSES

    International Nuclear Information System (INIS)

    Skelton, Rosalind E.; Whitaker, Katherine E.; Momcheva, Ivelina G.; Van Dokkum, Pieter G.; Bezanson, Rachel; Leja, Joel; Nelson, Erica J.; Oesch, Pascal; Brammer, Gabriel B.; Labbé, Ivo; Franx, Marijn; Fumagalli, Mattia; Van der Wel, Arjen; Da Cunha, Elisabete; Maseda, Michael V.; Förster Schreiber, Natascha; Kriek, Mariska; Lundgren, Britt F.; Magee, Daniel; Marchesini, Danilo

    2014-01-01

    The 3D-HST and CANDELS programs have provided WFC3 and ACS spectroscopy and photometry over ≈900 arcmin 2 in five fields: AEGIS, COSMOS, GOODS-North, GOODS-South, and the UKIDSS UDS field. All these fields have a wealth of publicly available imaging data sets in addition to the Hubble Space Telescope (HST) data, which makes it possible to construct the spectral energy distributions (SEDs) of objects over a wide wavelength range. In this paper we describe a photometric analysis of the CANDELS and 3D-HST HST imaging and the ancillary imaging data at wavelengths 0.3-8 μm. Objects were selected in the WFC3 near-IR bands, and their SEDs were determined by carefully taking the effects of the point-spread function in each observation into account. A total of 147 distinct imaging data sets were used in the analysis. The photometry is made available in the form of six catalogs: one for each field, as well as a master catalog containing all objects in the entire survey. We also provide derived data products: photometric redshifts, determined with the EAZY code, and stellar population parameters determined with the FAST code. We make all the imaging data that were used in the analysis available, including our reductions of the WFC3 imaging in all five fields. 3D-HST is a spectroscopic survey with the WFC3 and ACS grisms, and the photometric catalogs presented here constitute a necessary first step in the analysis of these grism data. All the data presented in this paper are available through the 3D-HST Web site (http://3dhst.research.yale.edu)

  12. 3D-HST WFC3-SELECTED PHOTOMETRIC CATALOGS IN THE FIVE CANDELS/3D-HST FIELDS: PHOTOMETRY, PHOTOMETRIC REDSHIFTS, AND STELLAR MASSES

    Energy Technology Data Exchange (ETDEWEB)

    Skelton, Rosalind E. [South African Astronomical Observatory, PO Box 9, Observatory, Cape Town 7935 (South Africa); Whitaker, Katherine E. [Astrophysics Science Division, Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Momcheva, Ivelina G.; Van Dokkum, Pieter G.; Bezanson, Rachel; Leja, Joel; Nelson, Erica J.; Oesch, Pascal [Department of Astronomy, Yale University, 260 Whitney Avenue, New Haven, CT 06511 (United States); Brammer, Gabriel B. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Labbé, Ivo; Franx, Marijn; Fumagalli, Mattia [Leiden Observatory, Leiden University, Leiden (Netherlands); Van der Wel, Arjen; Da Cunha, Elisabete; Maseda, Michael V. [Max Planck Institute for Astronomy (MPIA), Königstuhl 17, D-69117, Heidelberg (Germany); Förster Schreiber, Natascha [Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse, D-85748 Garching (Germany); Kriek, Mariska [Astronomy Department, University of California, Berkeley, CA 94720 (United States); Lundgren, Britt F. [Department of Astronomy, University of Wisconsin-Madison, 475 North Charter Street, Madison, WI 53706 (United States); Magee, Daniel [Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA (United States); Marchesini, Danilo, E-mail: ros@saao.ac.za [Department of Physics and Astronomy, Tufts University, Medford, MA 02155 (United States); and others

    2014-10-01

    The 3D-HST and CANDELS programs have provided WFC3 and ACS spectroscopy and photometry over ≈900 arcmin{sup 2} in five fields: AEGIS, COSMOS, GOODS-North, GOODS-South, and the UKIDSS UDS field. All these fields have a wealth of publicly available imaging data sets in addition to the Hubble Space Telescope (HST) data, which makes it possible to construct the spectral energy distributions (SEDs) of objects over a wide wavelength range. In this paper we describe a photometric analysis of the CANDELS and 3D-HST HST imaging and the ancillary imaging data at wavelengths 0.3-8 μm. Objects were selected in the WFC3 near-IR bands, and their SEDs were determined by carefully taking the effects of the point-spread function in each observation into account. A total of 147 distinct imaging data sets were used in the analysis. The photometry is made available in the form of six catalogs: one for each field, as well as a master catalog containing all objects in the entire survey. We also provide derived data products: photometric redshifts, determined with the EAZY code, and stellar population parameters determined with the FAST code. We make all the imaging data that were used in the analysis available, including our reductions of the WFC3 imaging in all five fields. 3D-HST is a spectroscopic survey with the WFC3 and ACS grisms, and the photometric catalogs presented here constitute a necessary first step in the analysis of these grism data. All the data presented in this paper are available through the 3D-HST Web site (http://3dhst.research.yale.edu)

  13. The BUFFALO HST Survey

    Science.gov (United States)

    Steinhardt, Charles; Jauzac, Mathilde; Capak, Peter; Koekemoer, Anton; Oesch, Pascal; Richard, Johan; Sharon, Keren q.; BUFFALO

    2018-01-01

    Beyond Ultra-deep Frontier Fields And Legacy Observations (BUFFALO) is an astronomical survey built around the six Hubble Space Telescope (HST) Frontier Fields clusters designed to learn about early galactic assembly and clustering and prepare targets for observations with the James Webb Space Telescope. BUFFALO will place significant new constraints on how and when the most massive and luminous galaxies in the universe formed and how early galaxy formation is linked to dark matter assembly. The same data will also probe the temperature and cross section of dark matter in the massive Frontier Fields galaxy clusters, and tell us how the dark matter, cluster gas, and dynamics of the clusters influence the galaxies in and around them. These studies are possible because the Spitzer Space Telescope, Chandra X-ray Observatory, XMM-Newton, and ground based telescopes have already invested heavily in deep observations around the Frontier Fields, so that the addition of HST observations can yield significant new results.

  14. VizieR Online Data Catalog: 3D-HST+CANDELS catalog (Skelton+, 2014)

    Science.gov (United States)

    Skelton, R. E.; Whitaker, K. E.; Momcheva, I. G.; Brammer, G. B.; van Dokkum, P. G.; Labbe, I.; Franx, M.; van der Wel, A.; Bezanson, R.; Da Cunha, E.; Fumagalli, M.; Forster Schreiber, N.; Kriek, M.; Leja, J.; Lundgren, B. F.; Magee, D.; Marchesini, D.; Maseda, M. V.; Nelson, E. J.; Oesch, P.; Pacifici, C.; Patel, S. G.; Price, S.; Rix, H.-W.; Tal, T.; Wake, D. A.; Wuyts, S.

    2015-09-01

    The majority of HST/WFC3 imaging comes from the 3D-HST and CANDELS surveys which, jointly, have covered ~940arcmin2 in three infrared filters: F125W, F140W, and F160W (HST cycle 11, 17, 18 and 19). See section 2 for further explanations. (1 data file).

  15. Accuracy of the HST Standard Astrometric Catalogs w.r.t. Gaia

    Science.gov (United States)

    Kozhurina-Platais, V.; Grogin, N.; Sabbi, E.

    2018-02-01

    The goal of astrometric calibration of the HST ACS/WFC and WFC3/UVIS imaging instruments is to provide a coordinate system free of distortion to the precision level of 0.1 pixel 4-5 mas or better. This astrometric calibration is based on two HST astrometric standard fields in the vicinity of the globular clusters, 47 Tuc and omega Cen, respectively. The derived calibration of the geometric distortion is assumed to be accurate down to 2-3 mas. Is this accuracy in agreement with the true value? Now, with the access to globally accurate positions from the first Gaia data release (DR1), we found that there are measurable offsets, rotation, scale and other deviations of distortion parameters in two HST standard astrometric catalogs. These deviations from the distortion-free and properly aligned coordinate system should be accounted and corrected for, so that the high precision HST positions are free of any systematic errors. We also found that the precision of the HST pixel coordinates is substantially better than the accuracy listed in the Gaia DR1. Therefore, in order to finalize the components of distortion in the HST standard catalogs, the next release of Gaia data is needed.

  16. Fundamental Stellar Parameters with HST/FGS Dynamical Masses and HST/STIS Spectroscopy of M Dwarf Binaries

    Science.gov (United States)

    Dieterich, Sergio; Henry, Todd J.; Benedict, George Fritz; Jao, Wei-Chun; White, Russel; RECONS Team

    2017-01-01

    Mass is the most fundamental stellar parameter, and yet model independent dynamical masses can only be obtained for a small subset of closely separated binaries. The high angular resolution needed to characterize individual components of those systems means that little is known about the details of their atmospheric properties. We discuss the results of HST/STIS observations yielding spatially resolved optical spectra for six closely separated M dwarf systems, all of which have HST/FGS precision dynamical masses for the individual components ranging from 0.4 to 0.076 MSol. We assume coevality and equal metallicity for the components of each system and use those constraints to perform stringent tests of the leading atmospheric and evolutionary model families throughout the M dwarf mass range. We find the latest models to be in good agreement with observations. We discuss specific spectral diagnostic features such as the well-known gravity sensitive Na and K lines and address ways to break the temperature-metallicity-gravity degeneracy that often hinders the interpretation of these features. We single out a comparison between the systems GJ 469 AB and G 250-29 AB, which have nearly identical mass configurations but different metallicities, thus causing marked differences in atmospheric properties and overall luminosities.This work is funded by NASA grant HST-GO-12938. and By the NSF Astronomy and Astrophysics Postdoctoral Fellowship program through NSF grant AST-1400680.

  17. Sample Set (SE): SE20 [Metabolonote[Archive

    Lifescience Database Archive (English)

    Full Text Available SE20 Arabidopsis thaliana leaf metabolite analysis for a software test Investigatio...es that were investigated to optimize the parameters of PowerGet software for better metabolite annotation i

  18. Systems Engineering and Integration for Advanced Life Support System and HST

    Science.gov (United States)

    Kamarani, Ali K.

    2005-01-01

    Systems engineering (SE) discipline has revolutionized the way engineers and managers think about solving issues related to design of complex systems: With continued development of state-of-the-art technologies, systems are becoming more complex and therefore, a systematic approach is essential to control and manage their integrated design and development. This complexity is driven from integration issues. In this case, subsystems must interact with one another in order to achieve integration objectives, and also achieve the overall system's required performance. Systems engineering process addresses these issues at multiple levels. It is a technology and management process dedicated to controlling all aspects of system life cycle to assure integration at all levels. The Advanced Integration Matrix (AIM) project serves as the systems engineering and integration function for the Human Support Technology (HST) program. AIM provides means for integrated test facilities and personnel for performance trade studies, analyses, integrated models, test results, and validated requirements of the integration of HST. The goal of AIM is to address systems-level integration issues for exploration missions. It will use an incremental systems integration approach to yield technologies, baselines for further development, and possible breakthrough concepts in the areas of technological and organizational interfaces, total information flow, system wide controls, technical synergism, mission operations protocols and procedures, and human-machine interfaces.

  19. Discovery of a Supernova in HST imaging of the MACSJ0717 Frontier Field

    Science.gov (United States)

    Rodney, Steven A.; Lotz, Jennifer; Strolger, Louis-Gregory

    2013-10-01

    We report the discovery of a supernova (SN) in Hubble Space Telescope (HST) observations centered on the galaxy cluster MACSJ0717. It was discovered in the F814W (i) band of the Advanced Camera for Surveys (ACS), in observations that were collected as part of the ongoing HST Frontier Fields (HFF) program (PI:J.Lotz, HST PID 13498). The FrontierSN ID for this object is SN HFF13Zar (nicknamed "SN Zara").

  20. Biotin starvation causes mitochondrial protein hyperacetylation and partial rescue by the SIRT3-like deacetylase Hst4p

    DEFF Research Database (Denmark)

    Madsen, Christian Toft; Sylvestersen, Kathrine Beck; Young, Clifford

    2015-01-01

    deficiency. Upregulated mitochondrial acetylation sites correlate with the cellular deficiency of the Hst4p deacetylase, and a biotin-starvation-induced accumulation of Hst4p in mitochondria supports a role for Hst4p in lowering mitochondrial acetylation. We show that biotin starvation and knockout of Hst4p...... cause alterations in cellular respiration and an increase in reactive oxygen species (ROS). These results suggest that Hst4p plays a pivotal role in biotin metabolism and cellular energy homeostasis, and supports that Hst4p is a functional yeast homologue of the sirtuin deacetylase SIRT3. With biotin...

  1. The 1997 HST Calibration Workshop with a New Generation of Instruments

    Science.gov (United States)

    Casertano, S. (Editor); Jedrzejewski, R. (Editor); Keyes, T. (Editor); Stevens, M. (Editor)

    1997-01-01

    The Second Servicing mission in early 1997 has brought major changes to the Hubble Space Telescope (HST). Two of the original instruments, Faint Object Spectrograph (FOS) and Goddard High Resolution Spectrograph (GHRS), were taken out, and replaced by completely new instruments, the Space Telescope Imaging Spectrograph (STIS) and the Near Infrared Camera Multi-Object Spectrograph (NICMOS). Two new types of detectors were installed, and for the first time, HST gained infrared capabilities. A new Fine Guidance Sensor (FGS) was installed, with an alignment mechanism that could improve substantially both guiding and astrometric capabilities. With all these changes come new challenges. The characterization of the new instruments has required a major effort, both by their respective Investigation Definition Teams and at the Space Telescope Science Institute. All necessary final calibrations for the retired spectrographs needed to be carried out, and their properties definitively characterized. At the same time, work has continued to improve our understanding of the instruments that have remained on board. The results of these activities were discussed in the 1997 HST (Hubble Space Telescope) Calibration Workshop. The main focus of the Workshop was to provide users with the tools and the understanding they need to use HST's instruments and archival data to the best of their possibilities. This book contains the written record of the Workshop. As such, it should provide a valuable tool to all interested in using existing HST data or in proposing for new observations.

  2. Tax Impact of BC’s HST Debate on Investment and Competitiveness

    Directory of Open Access Journals (Sweden)

    Jack M. Mintz

    2011-05-01

    Full Text Available If voters kill British Columbia’s Harmonized Sales Tax (HST in a June referendum, the province’s economy will suffer in the long run. A rejection will spur the rebirth of the provincial retail sales tax, leading to steep increases in the marginal effective tax rates on capital and costs and a corresponding dip in investment and job creation. Should voters decide to keep the HST, BC will reduce the tax by two points over the next three years and raise the corporate income tax rate to bridge the revenue gap. This will also negatively impact corporate competitiveness, but since the government has indicated that the hike will be temporary, retaining the HST is the best option for BC’s economy.

  3. Updating the HST/ACS G800L Grism Calibration

    Science.gov (United States)

    Hathi, Nimish P.; Pirzkal, Norbert; Grogin, Norman A.; Chiaberge, Marco; ACS Team

    2018-06-01

    We present results from our ongoing work on obtaining newly derived trace and wavelength calibrations of the HST/ACS G800L grism and comparing them to previous set of calibrations. Past calibration efforts were based on 2003 observations. New observations of an emission line Wolf-Rayet star (WR96) were recently taken in HST Cycle 25 (PID: 15401). These observations are used to analyze and measure various grism properties, including wavelength calibration, spectral trace/tilt, length/size of grism orders, and spacing between various grism orders. To account for the field dependence, we observe WR96 at 3 different observing positions over the HST/ACS field of view. The three locations are the center of chip 1, the center of chip 2, and the center of the WFC1A-2K subarray (center of WFC Amp A on chip 1). This new data will help us to evaluate any differences in the G800L grism properties compared to previous calibration data, and to apply improved data analysis techniques to update these old measurements.

  4. Modernizing Pickles - A Tool for Planning and Scheduling HST Astrometry

    Science.gov (United States)

    Juarez, Aaron; McArthur, B.; Benedict, G. F.

    2007-12-01

    Pickles is a Macintosh program written in C that was developed as a tool for determining pointings and rolls of the Hubble Space Telescope (HST) to place targets and astrometric reference stars in the Fine Guidance Sensor (FGS) field of regard ("pickles"). The program was developed in the late 1980s and runs under the "Classic” System. Ongoing HST astrometry projects require that this code be ported to the Intel-Mac OSX, because the Classic System is now unsupported. Pickles is a vital part of HST astrometry research. It graphically aids the investigator to determine where, when, and how the HST/FGS combination can observe an object and associated astrometric reference stars. Presently, Pickles can extract and display star positions from Guide Star Catalogs, such as the ACRS, SAO, and AGK3 catalogs via CD-ROMs. Future improvements will provide access to these catalogs and others through the internet. As an example of the past utility of Pickles, we highlight the recent determination of parallaxes for ten galactic Cepheids to determine an improved solar-metallicity Period-Luminosity relation. Support for this work was provided by NASA through grants GO-10989, -11210, and -11211 from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555.

  5. Transformation reborn: A new generation expert system for planning HST operations

    Science.gov (United States)

    Gerb, Andrew

    1991-01-01

    The Transformation expert system (TRANS) converts proposals for astronomical observations with the Hubble Space Telescope (HST) into detailed observing plans. It encodes expert knowledge to solve problems faced in planning and commanding HST observations to enable their processing by the Science Operations Ground System (SOGS). Among these problems are determining an acceptable order of executing observations, grouping of observations to enhance efficiency and schedulability, inserting extra observations when necessary, and providing parameters for commanding HST instruments. TRANS is currently an operational system and plays a critical role in the HST ground system. It was originally designed using forward-chaining provided by the OPS5 expert system language, but has been reimplemented using a procedural knowledge base. This reimplementation was forced by the explosion in the amount of OPS5 code required to specify the increasingly complicated situations requiring expert-level intervention by the TRANS knowledge base. This problem was compounded by the difficulty of avoiding unintended interaction between rules. To support the TRANS knowledge base, XCL, a small but powerful extension to Commom Lisp was implemented. XCL allows a compact syntax for specifying assignments and references to object attributes. XCL also allows the capability to iterate over objects and perform keyed lookup. The reimplementation of TRANS has greatly diminished the effort needed to maintain and enhance it. As a result of this, its functions have been expanded to include warnings about observations that are difficult or impossible to schedule or command, providing data to aid SPIKE, an intelligent planning system used for HST long-term scheduling, and providing information to the Guide Star Selection System (GSSS) to aid in determination of the long range availability of guide stars.

  6. Twelve Years of the HST Advanced Camera for Surveys : Calibration Update

    Science.gov (United States)

    Grogin, Norman A.

    2014-06-01

    The Advanced Camera for Surveys (ACS) has been a workhorse HST imager for over twelve years, subsequent to its Servicing Mission 3B installation. The once defunct ACS Wide Field Channel (WFC) has now been operating longer since its Servicing Mission 4 repair than it had originally operated prior to its 2007 failure. Despite the accumulating radiation damage to the WFC CCDs during their long stay in low Earth orbit, ACS continues to be heavily exploited by the HST community as both a prime and a parallel detector. Conspicuous examples include the recently completed HST Multi-cycle Treasury programs, and the ongoing HST Frontier Fields (HFF) program.We review recent developments in ACS calibration that enable the continued high performance of this instrument, with particular attention the to the Wide Field Channel. Highlights include: 1) the refinement of the WFC geometric distortion solution and its time dependency; 2) the efficacy of both pixel-based and catalog-based corrections for the worsening WFC charge-transfer efficiency (CTE); 3) the extension of pixel-based CTE correction to the WFC 2K subarray mode; and 4) a novel "self-calibration" technique appropriate for large-number stacks of deep WFC exposures (such as the HFF targets) that provides superior reductions compared to the standard CALACS reduction pipeline.

  7. Marketing Mix del Software.

    Directory of Open Access Journals (Sweden)

    Yudith del Carmen Rodríguez Pérez

    2006-03-01

    Por ello, en este trabajo se define el concepto de producto software, se caracteriza al mismo y se exponen sus atributos de calidad. Además, se aborda la mezcla de marketing del software necesaria y diferente a la de otros productos para que este triunfe en el mercado.

  8. Biotin starvation causes mitochondrial protein hyperacetylation and partial rescue by the SIRT3-like deacetylase Hst4p

    Science.gov (United States)

    Madsen, Christian T.; Sylvestersen, Kathrine B.; Young, Clifford; Larsen, Sara C.; Poulsen, Jon W.; Andersen, Marianne A.; Palmqvist, Eva A.; Hey-Mogensen, Martin; Jensen, Per B.; Treebak, Jonas T.; Lisby, Michael; Nielsen, Michael L.

    2015-01-01

    The essential vitamin biotin is a covalent and tenaciously attached prosthetic group in several carboxylases that play important roles in the regulation of energy metabolism. Here we describe increased acetyl-CoA levels and mitochondrial hyperacetylation as downstream metabolic effects of biotin deficiency. Upregulated mitochondrial acetylation sites correlate with the cellular deficiency of the Hst4p deacetylase, and a biotin-starvation-induced accumulation of Hst4p in mitochondria supports a role for Hst4p in lowering mitochondrial acetylation. We show that biotin starvation and knockout of Hst4p cause alterations in cellular respiration and an increase in reactive oxygen species (ROS). These results suggest that Hst4p plays a pivotal role in biotin metabolism and cellular energy homeostasis, and supports that Hst4p is a functional yeast homologue of the sirtuin deacetylase SIRT3. With biotin deficiency being involved in various metabolic disorders, this study provides valuable insight into the metabolic effects biotin exerts on eukaryotic cells. PMID:26158509

  9. SeDA: A software package for the statistical analysis of the instrument drift

    International Nuclear Information System (INIS)

    Lee, H. J.; Jang, S. C.; Lim, T. J.

    2006-01-01

    The setpoints for safety-related equipment are affected by many sources of an uncertainty. ANSI/ISA-S67.04.01-2000 [1] and ISA-RP6 7.04.02-2000 [2] suggested the statistical approaches for ensuring that the safety-related instrument setpoints were established and maintained within the technical specification limits [3]. However, Jang et al. [4] indicated that the preceding methodologies for a setpoint drift analysis might be insufficient to manage a setpoint drift on an instrumentation device and proposed new statistical analysis procedures for the management of a setpoint drift, based on the plant specific as-found/as-left data. Although IHPA (Instrument History Performance Analysis) is a widely known commercial software package to analyze an instrument setpoint drift, several steps in the new procedure cannot be performed by using it because it is based on the statistical approaches suggested in the ANSI/ISA-S67.04.01 -2000 [1] and ISA-RP67.04.02-2000 [2], In this paper we present a software package (SeDA: Setpoint Drift Analysis) that implements new methodologies, and which is easy to use, as it is accompanied by powerful graphical tools. (authors)

  10. Software engineering knowledge at your fingertips: Experiences with a software engineering-portal

    OpenAIRE

    Punter, T.; Kalmar, R.

    2003-01-01

    In order to keep up the pace with technology development, knowledge on Software Engineering (SE) methods, techniques, and tools is required. For an effective and efficient knowledge transfer, especially Small and Medium-sized Enterprises (SMEs) might benefit from Software Engineering Portals (SE-Portals). This paper provides an analysis of SE-Portals by distinguishing two types: 1) the Knowledge Portal and 2) the Knowledge & Community Portal. On behalf of the analysis we conclude that most SE...

  11. The HST Key Project on the Extragalactic Distance Scale

    Science.gov (United States)

    Freedman, W. L.

    1994-12-01

    One of the major unresolved problems in observational cosmology is the determination of the Hubble Constant, (H_0). The Hubble Space Telescope (HST) Key Project on the Extragalactic Distance Scale aims to provide a measure of H_0 to an accuracy of 10%. Historically the route to H_0 has been plagued by systematic errors; hence there is no quick and easy route to a believeable value of H_0. Achieving plausible error limits of 10% requires careful attention to eliminating potential sources of systematic error. The strategy adopted by the Key Project team is threefold: First, to discover Cepheids in spiral galaxies located in the field and in small groups that are suitable for the calibration of several independent secondary methods. Second, to make direct Cepheid measurements of 3 spiral galaxies in the Virgo cluster and 2 members of the Fornax cluster. Third, to provide a check on the the Cepheid distance scale via independent distance estimates to nearby galaxies, and in addition, to undertake an empirical test of the sensitivity of the zero point of the Cepheid PL relation to heavy-element abundances. First results from the HST Key Project will be presented. We have now determined Cepheid distances to 4 galaxies using the HST: these are the nearby galaxies M81 and M101, the edge-on galaxy NGC 925, and the face-on spiral galaxy M100 in the Virgo cluster. Recently we have measured a Cepheid distance for M100 of 17 +/- 2 Mpc, which yields a value of H_0 = 80 +/- 17 km/sec/Mpc. This work was carried out in collaboration with the other members of the HST Key Project team, R. Kennicutt, J. Mould, F. Bresolin, S. Faber, L. Ferrarese, H. Ford, J. Graham, J. Gunn, M. Han, P. Harding, J. Hoessel, R. Hill, J. Huchra, S. Hughes, G. Illingworth, D. Kelson, B. Madore, R. Phelps, A. Saha, N. Silbermann, P. Stetson, and A. Turner.

  12. Calidad del software: camino hacia una verdadera industria del software

    Directory of Open Access Journals (Sweden)

    Saulo Ernesto Rojas Salamanca

    1999-07-01

    Full Text Available El software es quizá uno de los productos de la ingeniería que más ha evolucionado en muy poco tiempo, pasando desde el software empírico o artesanal hasta llegar al software desarrollado bajo los principios y herramientas de la ingeniería del software. Sin embargo, dentro de estos cambios, las personas encargadas de la elaboración del software se han enfrentado a problemas muy comunes: unos debido a la exigencia cada vez mayor en la capacidad de resultados del software, debido al permanente cambio de condiciones lo que aumenta su complejidad y obsolescencia; y otros, debido a la carencia de herramientas adecuadas y estándares de tipo organizacional encaminados al mejoramiento de los procesos en el desarrollo del software. Hacia la búsqueda de mecanismos de solución de estos últimos problemas se orienta este artículo...

  13. Monitoring of Mira (omi Cet) in support of HST Observations

    Science.gov (United States)

    Karovska, Margarita; Templeton, Matthew R.

    2007-09-01

    Dr. Margarita Karovska (Harvard-Smithsonian Center for Astrophysics) and collaborators are performing a comprehensive study of the Mira AB interacting system, using the HST WFPC2 camera. Mira AB is composed of the prototype Mira variable omi Cet and its companion VZ Cet, separated by about 0.5 arcsecond. As part of this project they plan to obtain a large number of high-angular resolution images at wavelengths ranging from UV to optical. The main objectives of the HST/WFPC2 observations are 1) to determine the properties of the material ejected in December 2004 as it flows throughout the binary and interacts with the Mira A (omi Cet, Mira) circumstellar material and wind; 2) to determine the physical characteristics of mass transfer in this system and especially the role of the accretion stream between Mira A and its accreting companion Mira B (VZ Cet); 3) to determine the response of the system to the increased accretion rate onto Mira B following the outburst. The HST observations are scheduled for September 23, 1900-2300 UT. Both visual and instrumental observers are requested to observe this object, currently at minimum around visual magnitude 9-9.5. Observations should be made approximately two weeks on either side of the September 23 observation date. Visual observer should observe as usual, making not more than 3 observations spaced about 10 days apart. PEP and CCD observers should use the bluest-wavelength filters they have, and should make nightly observations, with intensive observations during the HST observations themselves. UBV and RIJH observations would be very valuable. Please make sure to use an aperture that covers both omi Cet and VZ Cet when evaluating CCD images. Observations should be submitted to the AAVSO International Database as OMI CET.

  14. HST Replacement Battery Initial Performance

    Science.gov (United States)

    Krol, Stan; Waldo, Greg; Hollandsworth, Roger

    2009-01-01

    The Hubble Space Telescope (HST) original Nickel-Hydrogen (NiH2) batteries were replaced during the Servicing Mission 4 (SM4) after 19 years and one month on orbit.The purpose of this presentation is to highlight the findings from the assessment of the initial sm4 replacement battery performance. The batteries are described, the 0 C capacity is reviewed, descriptions, charts and tables reviewing the State Of Charge (SOC) Performance, the Battery Voltage Performance, the battery impedance, the minimum voltage performance, the thermal performance, the battery current, and the battery system recharge ratio,

  15. Free software, Open source software, licenses. A short presentation including a procedure for research software and data dissemination

    OpenAIRE

    Gomez-Diaz , Teresa

    2014-01-01

    4 pages. Spanish version: Software libre, software de código abierto, licencias. Donde se propone un procedimiento de distribución de software y datos de investigación; The main goal of this document is to help the research community to understand the basic concepts of software distribution: Free software, Open source software, licenses. This document also includes a procedure for research software and data dissemination.

  16. Statistical Software Engineering

    Science.gov (United States)

    1998-04-13

    multiversion software subject to coincident errors. IEEE Trans. Software Eng. SE-11:1511-1517. Eckhardt, D.E., A.K Caglayan, J.C. Knight, L.D. Lee, D.F...J.C. and N.G. Leveson. 1986. Experimental evaluation of the assumption of independence in multiversion software. IEEE Trans. Software

  17. Monitoring of V380 Oph requested in support of HST observations

    Science.gov (United States)

    Waagen, Elizabeth O.

    2012-08-01

    On behalf of a large Hubble Space Telescope consortium of which they are members, Dr. Joseph Patterson (Columbia University, Center for Backyard Astrophysics) and Dr. Arne Henden (AAVSO) requested observations from the amateur astronomer community in support of upcoming HST observations of the novalike VY Scl-type cataclysmic variable V380 Oph. The HST observations will likely take place in September but nightly visual observations are needed beginning immediately and continuing through at least October 2012. The astronomers plan to observe V380 Oph while it is in its current low state. Observations beginning now are needed to determine the behavior of this system at minimum and to ensure that the system is not in its high state at the time of the HST observations. V380 Oph is very faint in its low state: magnitude 17 to 19 and perhaps even fainter. Nightly snapshot observations, not time series, are requested, as is whatever technique - adding frames, lengthening exposur! es, etc. - necessary to measure the magnitude. It is not known whether V380 Oph is relatively inactive at minimum or has flares of one to two magnitudes; it is this behavior that is essential to learn in order to safely execute the HST observations. Finder charts with sequence may be created using the AAVSO Variable Star Plotter (http://www.aavso.org/vsp). Observations should be submitted to the AAVSO International Database. See full Alert Notice for more details. NOTE: This campaign was subsequently cancelled when it was learned V830 Oph was not truly in its low state. See AAVSO Alert Notice 468 for details.

  18. Those Crafty Cepheids: Surprises From Ground-Based Photometry and HST-COS FUV Spectra

    Science.gov (United States)

    Engle, Scott G.; Guinan, E. F.; Neilson, H.; Wasatonic, R. P.; Harper, G.

    2013-06-01

    Several years ago the Secret Lives of Cepheids (SLiC) program was initiated to look for unexpected or exotic behaviors from Cepheids. Regular photometric monitoring of Cepheids already possessing robust historical datasets was started to better understand long-term pulsation period changes, but to look for possible amplitude changes as well. At the time, only two “unusual” Cepheids were known to have undergone amplitude changes - Polaris and V473 Lyr. To date, however, the SLiC program has found evidence for amplitude changes in seven other Cepheids, raising the possibility that a "Blazhko effect" could be at work in certain Cepheids, as exists in a subset of RR Lyr stars. As the program expanded, we found that previous International Ultraviolet Exporer (IUE) studies showed certain Cepheids to have UV emissions from warm-to-hot stellar atmospheres. On top of that, the emissions were variable and well-phased to the stellar pulsation period, indicating that the mechanism heating the Cepheid atmosphere was influenced by these pulsations, if not linked to them. With the installation of the Cosmic Origins Spectrograph (COS) onboard the Hubble Space Telescope (HST), a modern, high-quality UV spectrograph was now operating that could efficiently obtain high-resolution spectra of the Cepheids. We have been fortunate to observe four Cepheids to date with COS, and the results are well beyond anything IUE had led us to expect. Here we will present the current optical and UV results of the SLiC program, the implications of the results, and the future direction and expansion of the program. We gratefully acknowledge support for this program from HST grants HST-GO-11726.01-A, HST-GO-12302.01-A and HST-GO-13019.01-A, as well as NSF/RUI grant AST-1009903.

  19. HST Archival Imaging of the Light Echoes of SN 1987A

    Science.gov (United States)

    Lawrence, S. S.; Hayon, M.; Sugerman, B. E. K.; Crotts, A. P. S.

    2002-12-01

    We have undertaken a search for light echo signals from Supernova 1987A that have been serendipitously recorded in images taken near the 30 Doradus region of the Large Magellanic Cloud by HST. We used the MAST interface to create a database of the 1282 WF/PC, WFPC2 and STIS images taken within 15 arcminutes of the supernova, between 1992 April and 2002 June. These 1282 images are grouped into 125 distinct epochs and pointings, with each epoch containing between 1 and 42 separate exposures. Sorting this database with various programs, aided by the STScI Visual Target Tuner, we have identified 63 pairs of WFPC2 imaging epochs that are not centered on the supernova but that have a significant amount of spatial overlap between their fields of view. These image data were downloaded from the public archive, cleaned of cosmic rays, and blinked to search for light echoes at radii larger than 2 arcminutes from the supernova. Our search to date has focused on those pairs of epochs with the largest degree of overlap. Of 16 pairs of epochs scanned to date, we have detected 3 strong light echoes and one faint, tentative echo signal. We will present direct and difference images of these and any further echoes, as well as the 3-D geometric, photometric and color properties of the echoing dust structures. In addition, a set of 20 epochs of WF/PC and WFPC2 imaging centered on SN 1987A remain to be searched for echoes within 2 arcminutes of the supernova. We will discuss our plans to integrate the high spatial-resolution HST snapshots of the echoes with our extensive, well-time-sampled, ground-based imaging data. We gratefully acknowledge the support of this undergraduate research project through an HST Archival Research Grant (HST-AR-09209.01-A).

  20. HST Solar Arrays photographed by Electronic Still Camera

    Science.gov (United States)

    1993-01-01

    This close-up view of one of two Solar Arrays (SA) on the Hubble Space Telescope (HST) was photographed with an Electronic Still Camera (ESC), and downlinked to ground controllers soon afterward. Electronic still photography is a technology which provides the means for a handheld camera to electronically capture and digitize an image with resolution approaching film quality.

  1. HST Peer Review, Where We've Been, Where We Are Now and Possibly Where the Future Lies

    Science.gov (United States)

    Blacker, Brett S.; Macchetto, Duccio; Meylan, Georges; Stanghellini, Letizia; van der Marel, Roeland P.

    2002-12-01

    In some eyes, the Phase I proposal selection process is the most important activity handled by the Space Telescope Science Institute (STScI). Proposing for HST and other missions consists of requesting observing time and/or archival research funding. This step is called Phase I, where the scientific merit of a proposal is considered by a community based peer-review process. Accepted proposals then proceed thru Phase II, where the observations are specified in sufficient detail to enable scheduling on the telescope. Each cycle the Hubble Space Telescope (HST) Telescope Allocation Committee (TAC) reviews proposals and awards observing time that is valued at $0.5B, when the total expenditures for HST over its lifetime are figured on an annual basis. This is in fact a very important endeavor that we continue to fine-tune and tweak. This process is open to the science community and we constantly receive comments and praise for this process. Several cycles ago we instituted several significant changes to the process to address concerns such as: Fewer, broader panels, with redundancy to avoid conflicts of interest; Redefinition of the TAC role, to focus on Larger programs; and incentives for the panels to award time to medium sized proposals. In the last cycle, we offered new initiatives to try to enhance the scientific output of the telescope. Some of these initiatives were: Hubble Treasury Program; AR Legacy Program; and the AR Theory Program. This paper will outline the current HST Peer review process. We will discuss why we made changes and how we made changes from our original system. We will also discuss some ideas as to where we may go in the future to generate a stronger science program for HST and to reduce the burden on the science community. This paper is an update of the status of the HST Peer Review Process that was described in the published paper "Evolution of the HST Proposal Selection Process".

  2. Homogentisate solanesyl transferase (HST) cDNA’s in maize

    Science.gov (United States)

    Maize white seedling 3 (w3) has served as a model albino-seedling mutant since its discovery in 1923. We show that the w3 phenotype is caused by disruptions in homogentisate solanesyl transferase (HST), an enzyme that catalyzes the committed step in plastoquinone-9 (PQ9) biosynthesis. This reaction ...

  3. THE USE OF ANALOG PROCESSES AS A FACTOR TO IMPROVE SOFTWARE QUALITY: A CASE STUDY OF ORTHO-MEDICAL SOFTWARE

    OpenAIRE

    GABRIEL VIEIRA MONTEIRO

    2003-01-01

    A presente dissertação avalia um software médico através de parâmetros e critérios ergonômicos. Primeiramente descrevem- se os conceitos relativos a Tecnologia da Informação e conceitua-se o software como um dos subsistemas de qualquer sistema de Tecnologia da Informação. A partir de então, verificou-se as etapas de desenvolvimento de software, relacionados ao contexto de usabilidade. Levantaram-se também os principais problemas de interação encontrados no...

  4. HST SATURN WFPC2 3 RING PLANE CROSSING V1.0

    Data.gov (United States)

    National Aeronautics and Space Administration — This data set contains images of the Saturn system taken by the Wide Field/Planetary Camera 2 (WFPC2) aboard the Hubble Space Telescope (HST) through November 1995....

  5. An HST Survey of Intermediate Luminosity X-ray Objects

    Science.gov (United States)

    Roye, E. W.; Colbert, E. J. M.; Heckman, T.; Ptak, R. F.; van der Marel, R. P.

    2003-03-01

    We searched for optical counterparts to 54 Intermediate-luminosity X-ray Objects (IXOs, a.k.a. ULXs) using HST WFPC2 archive data, and have uncovered a high yield of intriguing possible correlations. A total of 124 IXOs were identified from searching all of the Chandra ACIS archival galaxy data as of July 17, 2002. Archival WFPC2 data were available for 54 of these IXOs. The optical data utilized in this study consisted of 121 HST WFPC2 associations (stacked images). We will discuss the various methods used to register the HST WFPC2 images with the Chandra X-ray images. Our preliminary analysis indicates that 37 ( ˜70%) of the 54 IXOs have at least one 4 sigma counterpart within 1" of the IXO position, and ˜25% have unique counterparts (mostly in elliptical galaxies). The detection limit of the counterparts was typically 24-25 magnitudes in B, V, and R. The absolute magnitudes of many of the found counterparts appeared to correspond roughly to either the expected magnitudes for globular clusters, or the expected magnitudes for the brightest stars. Initial results illustrate that of the 37 IXOs with counterparts, 25 ( ˜70%) were in spiral, irregular, and merger galaxies, where the counterparts were often diffuse or clump-like sources. The counterparts found in elliptical galaxies were primarily single luminous point-sources, most likely globular clusters. We will discuss the results of color analysis for fields where counterparts in multiple bands exist, particularly for cases where a single counterpart is found. A preliminary finding in elliptical galaxies is that globular clusters associated with IXOs tend to be red, suggesting that IXOs are not found in metal-poor globular clusters.

  6. Mining the HST Treasury: The ASTRAL Reference Spectra for Evolved M Stars

    Science.gov (United States)

    Carpenter, K. G.; Ayres, T.; Harper, G.; Kober, G.; Wahlgren, G. M.

    2012-01-01

    The "Advanced Spectral Library (ASTRAL) Project: Cool Stars" (PI = T. Ayres) is an HST Cycle 18 Treasury Program designed to collect a definitive set of representative, high-resolution (R greater than 100,000) and high signal/noise (S/N greater than 100) UV spectra of eight F-M evolved cool stars. These extremely high-quality STIS UV echelle spectra are available from the HST archive and through the University of Colorado (http://casa.colorado.edu/ayres/ASTRAL/) portal and will enable investigations of a broad range of problems -- stellar, interstellar. and beyond -- for many years. In this current paper, we concentrate on producing a roadrnap to the very rich spectra of the two evolved M stars in the sample, the M3.4 giant Gamma Crucis (GaCrux) and the M2Iab supergiant Alpha Orionis (Betelgeuse) and illustrate the huge increase in coverage and quality that these spectra provide over that previously available from IUE and earlier HST observations. These roadmaps will facilitate the study of the spectra, outer atmospheres, and winds of not only these stars. but also numerous other cool, low-gravity stars and make a very interesting comparison to the already-available atlases of the K2III giant Arcturus.

  7. HST Proper Motions of Distant Globular Clusters: Constraining the Formation & Mass of the Milky Way

    Science.gov (United States)

    Sohn, S. Tony; van der Marel, Roeland P.; Deason, Alis; Bellini, Andrea; Besla, Gurtina; Watkins, Laura

    2018-04-01

    Proper motions (PMs) are required to calculate accurate orbits of globular clusters (GCs) in the Milky Way (MW) halo. We present our HST program to create a PM database for 20 GCs at distances of R GC = 10-100 kpc. Targets are discussed along with PM measurement methods. We also describe how our PM results can be used for Gaia as an external check, and discuss the synergy between HST and Gaia as astrometric instruments in the coming years.

  8. Metodología de desarrollo y mantenimiento de software para una fábrica de software

    OpenAIRE

    Ocola Agüero, Robert Percy; Ocola Agüero, Robert Percy

    2012-01-01

    Actualmente la fábrica de software se encarga de ejecutar proyectos de desarrollo y mantenimiento de sistemas de información para empresas y entidades estatales. Esta tesis plantea proponer una nueva metodología que mejore el desarrollo y mantenimiento de la fábrica de software. Para ello se realizó un análisis de las diversas fases de desarrollo de la metodología actualmente existente y con los resultados obtenidos se propuso una metodología que agregue valor. Finalmente se realizó la aplica...

  9. Synergy with HST and JWST Data Management Systems

    Science.gov (United States)

    Greene, Gretchen; Space Telescope Data Management Team

    2014-01-01

    The data processing and archive systems for the JWST will contain a petabyte of science data and the best news is that users will have fast access to the latest calibrations through a variety of new services. With a synergistic approach currently underway with the STScI science operations between the Hubble Space Telescope and James Webb Space Telescope data management subsystems (DMS), operational verification is right around the corner. Next year the HST archive will provide scientists on-demand fully calibrated data products via the Mikulski Archive for Space Telescopes (MAST), which takes advantage of an upgraded DMS. This enhanced system, developed jointly with the JWST DMS is based on a new CONDOR distributed processing system capable of reprocessing data using a prioritization queue which runs in the background. A Calibration Reference Data System manages the latest optimal configuration for each scientific instrument pipeline. Science users will be able to search and discover the growing MAST archive calibrated datasets from these missions along with the other multiple mission holdings both local to MAST and available through the Virtual Observatory. JWST data systems will build upon the successes and lessons learned from the HST legacy and move us forward into the next generation of multi-wavelength archive research.

  10. Marginalizing Instrument Systematics in HST WFC3 Transit Light Curves

    Science.gov (United States)

    Wakeford, H. R.; Sing, D. K.; Evans, T.; Deming, D.; Mandell, A.

    2016-03-01

    Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) infrared observations at 1.1-1.7 μm probe primarily the H2O absorption band at 1.4 μm, and have provided low-resolution transmission spectra for a wide range of exoplanets. We present the application of marginalization based on Gibson to analyze exoplanet transit light curves obtained from HST WFC3 to better determine important transit parameters such as Rp/R*, which are important for accurate detections of H2O. We approximate the evidence, often referred to as the marginal likelihood, for a grid of systematic models using the Akaike Information Criterion. We then calculate the evidence-based weight assigned to each systematic model and use the information from all tested models to calculate the final marginalized transit parameters for both the band-integrated and spectroscopic light curves to construct the transmission spectrum. We find that a majority of the highest weight models contain a correction for a linear trend in time as well as corrections related to HST orbital phase. We additionally test the dependence on the shift in spectral wavelength position over the course of the observations and find that spectroscopic wavelength shifts {δ }λ (λ ) best describe the associated systematic in the spectroscopic light curves for most targets while fast scan rate observations of bright targets require an additional level of processing to produce a robust transmission spectrum. The use of marginalization allows for transparent interpretation and understanding of the instrument and the impact of each systematic evaluated statistically for each data set, expanding the ability to make true and comprehensive comparisons between exoplanet atmospheres.

  11. Software libre, software de código abierto, licencias. Donde se propone un procedimiento de distribución de software y datos de investigación

    OpenAIRE

    Gomez-Diaz, Teresa

    2015-01-01

    English version: Free software, Open source software, licenses. A short presentation including a procedure for research software and data dissemination; El objetivo de este documento es ayudar a la comunidad de investigación a entender los conceptos básicos de la distribución de software: software libre, software de código abierto, licencias. Este documento incluye igualmente un procedimiento para la distribución de datos y software de investigación.

  12. Calibration of colour gradient bias in shear measurement using HST/CANDELS data

    Science.gov (United States)

    Er, X.; Hoekstra, H.; Schrabback, T.; Cardone, V. F.; Scaramella, R.; Maoli, R.; Vicinanza, M.; Gillis, B.; Rhodes, J.

    2018-06-01

    Accurate shape measurements are essential to infer cosmological parameters from large area weak gravitational lensing studies. The compact diffraction-limited point spread function (PSF) in space-based observations is greatly beneficial, but its chromaticity for a broad-band observation can lead to new subtle effects that could hitherto be ignored: the PSF of a galaxy is no longer uniquely defined and spatial variations in the colours of galaxies result in biases in the inferred lensing signal. Taking Euclid as a reference, we show that this colour gradient bias (CG bias) can be quantified with high accuracy using available multicolour Hubble Space Telescope (HST) data. In particular we study how noise in the HST observations might impact such measurements and find this to be negligible. We determine the CG bias using HST observations in the F606W and F814W filters and observe a correlation with the colour, in line with expectations, whereas the dependence with redshift is weak. The biases for individual galaxies are generally well below 1 per cent, which may be reduced further using morphological information from the Euclid data. Our results demonstrate that CG bias should not be ignored, but it is possible to determine its amplitude with sufficient precision, so that it will not significantly bias the weak lensing measurements using Euclid data.

  13. Análisis de la implementación software de un conformador de señales ultrasónicas para tiempo real

    Directory of Open Access Journals (Sweden)

    D. Romero-Laorden

    2016-10-01

    Full Text Available Resumen: Este trabajo analiza la implementación software en un sistema de imagen ultrasónica del Total Focusing Method para la compensación dinámica en tiempo real de los tiempos de vuelo para emisión y recepción de todos los puntos de la imagen. Para ello, haciendo uso de técnicas GPGPU, se analizan dos diferentes alternativas de implementación, mostrando como una planificación adecuada de acceso a los datos permite mejorar los tiempos de ejecución del algoritmo. Abstract: This paper studies the software implementation in an ultrasonic imaging system of Total Focusing Method. In order to accomplish real-time requirements parallel programming techniques have been used. Then, using GPGPU techniques, two different implementation alternatives are analysed, showing how proper planning of access to data improves the performance of the algorithm. Palabras clave: Imagen Ultrasónica, Procesamiento de Señal, Computación Paralela, GPU, CUDA, Keywords: Ultrasonic imaging GPU Signal Processing Parallel computing CUDA

  14. Computer-Aided Software Engineering - An approach to real-time software development

    Science.gov (United States)

    Walker, Carrie K.; Turkovich, John J.

    1989-01-01

    A new software engineering discipline is Computer-Aided Software Engineering (CASE), a technology aimed at automating the software development process. This paper explores the development of CASE technology, particularly in the area of real-time/scientific/engineering software, and a history of CASE is given. The proposed software development environment for the Advanced Launch System (ALS CASE) is described as an example of an advanced software development system for real-time/scientific/engineering (RT/SE) software. The Automated Programming Subsystem of ALS CASE automatically generates executable code and corresponding documentation from a suitably formatted specification of the software requirements. Software requirements are interactively specified in the form of engineering block diagrams. Several demonstrations of the Automated Programming Subsystem are discussed.

  15. A Cloverleaf of Software Engineering

    DEFF Research Database (Denmark)

    Bjørner, Dines

    2005-01-01

    , however "lite". Third, despite 35 years of formal methods, the SE industry, maturity-wise still lags far behind that of other engineering disciplines. So we examine why. Finally, in several areas, in health care, in architecture, and others, we see that major undertakings are primarily spearheaded...... by senior academic staff. Professors of medicine daily perform specialized surgery and treatments at hospitals. Professors of architecture design new, daring buildings for industry, and professors of civil engineering head the engineering structural design of new, daring bridges. So we speculate what......We shall touch upon four issues of software engineering (SE): domain engineering, formal techniques, SE sociology, and academic software architects. First, before software can be designed one must understand its requirements; but before requirements can be formulated one must understand the domain...

  16. VizieR Online Data Catalog: WASP-31b:HST/Spitzer transmission spectral survey (Sing+, 2015)

    Science.gov (United States)

    Sing, D. K.; Wakeford, H. R.; Showman, A. P.; Nikolov, N.; Fortney, J. J.; Burrows, A. S.; Ballester, G. E.; Deming, D.; Aigrain, S.; Desert, J.-M.; Gibson, N. P.; Henry, G. W.; Knutson, H.; Lecavelier Des Etangs, A.; Pont, F.; Vidal-Madjar, A.; Williamson, M. W.; Wilson, P. A.

    2017-11-01

    We observed two transits of WASP-31b with the HST STIS G430L grating during 2012 June 13 and 26, as well as one transit with the STIS G750L during 2012 July 10. In addition to the STIS data, observations of WASP-31b were also conducted in the infrared with WFC3 on the HST. Observations began on 2012 May 13 at 12:53 using the IR G141 grism in forward spatial scan mode over five HST orbits. We analyse two transit observations obtained using the Infrared Array Camera (IRAC) instrument (Programme 90092 with P.I. Desert) on the Spitzer space telescope in the 3.6 μm and 4.5 μm channels in subarray mode (32x32 pixel, or 39 centred on the planets host). The 3.6 μm observation was performed on UT 2013 March 9 (between 06:59 and 11:37) and the 4.5 observation was performed on UT 2013 March 19 (between 12:19 and 16:58). (1 data file).

  17. Arquitectura orientada a servicios para software de apoyo para el proceso personal de software A service oriented architecture for the implementation of the personal software process

    Directory of Open Access Journals (Sweden)

    Erick Salinas

    2011-06-01

    Full Text Available El presente trabajo describe una arquitectura orientada a servicios para un software que tiene como objetivo facilitar la implementación de un Proceso Personal de Software en un equipo de desarrollo u organización. Entre las características que posee este software y que son relevantes de mencionar están las de entregar extensibilidad e independencia, esto se ve reflejado en la facilidad para agregar nuevas herramientas al proceso de desarrollo de software integradas al Proceso Personal de Software con un máximo de independencia de sistemas operativos y lenguajes de programación. El software implementado realiza la recolección de los datos necesarios para el Proceso Personal de Software casi completamente automática, considerando que el administrador solamente clasifica los errores que pueden ocurrir cuando se utiliza algún lenguaje de programación en particular, entre otras pequeñas tareas. Esta facilidad de uso hace que la implementación del Proceso Personal de Software se realice exitosamente con un bajo esfuerzo requerido por los integrantes del equipo de desarrollo.This work describes a service oriented architecture of a software application that facilitates the implementation of the Personal Software Process by a development team or an organization. Some of the characteristics of this software and which are important to mention are extensibility and technical environment independence. These characteristics facilitate the process of adding new tools to the software development process integrating them to the Personal Software Process independently of the operating systems and programming languages being used. The implemented software undertakes the data collection necessary to the Personal Software Process almost automatically, since the administrator must only classify the errors that may occur when a particular programming language is used, among other small tasks. This ease of use approach helps to make the implementation of

  18. Identifying Relevant Studies in Software Engineering

    DEFF Research Database (Denmark)

    Zhang, He; Ali Babar, Muhammad; Tell, Paolo

    2011-01-01

    Context: Systematic literature review (SLR) has become an important research methodology in software engineering since the introduction of evidence-based software engineering (EBSE) in 2004. One critical step in applying this methodology is to design and execute appropriate and effective search....... Objective: The main objective of the research reported in this paper is to improve the search step of undertaking SLRs in software engineering (SE) by devising and evaluating systematic and practical approaches to identifying relevant studies in SE. Method: We have systematically selected and analytically...

  19. cDNA sequence of human transforming gene hst and identification of the coding sequence required for transforming activity

    International Nuclear Information System (INIS)

    Taira, M.; Yoshida, T.; Miyagawa, K.; Sakamoto, H.; Terada, M.; Sugimura, T.

    1987-01-01

    The hst gene was originally identified as a transforming gene in DNAs from human stomach cancers and from a noncancerous portion of stomach mucosa by DNA-mediated transfection assay using NIH3T3 cells. cDNA clones of hst were isolated from the cDNA library constructed from poly(A) + RNA of a secondary transformant induced by the DNA from a stomach cancer. The sequence analysis of the hst cDNA revealed the presence of two open reading frames. When this cDNA was inserted into an expression vector containing the simian virus 40 promoter, it efficiently induced the transformation of NIH3T3 cells upon transfection. It was found that one of the reading frames, which coded for 206 amino acids, was responsible for the transforming activity

  20. High Resolution HST Images of Pluto and Charon

    Science.gov (United States)

    1994-05-01

    At the Edge of the Solar System Click here to jump to photo. The remote planet Pluto and its moon Charon orbit the Sun at a mean distance of almost 6,000 million kilometres, or nearly fourty times farther out than the Earth. During a recent investigation by an international group of astronomers [1], the best picture ever of Pluto and Charon [2] was secured with the European Space Agency's Faint Object Camera at the Hubble Space Telescope (HST). It shows the two objects as individual disks, and it is likely that further image enhancement will allow us to see surface features on Pluto. A Very Special Pair of Celestial Objects Almost all the known facts about these two bodies show that they are quite unusual: Pluto's orbit around the Sun is much more elongated and more inclined to the main plane of the Solar System than that of any other major planet; Charon's orbit around Pluto is nearly perpendicular to this plane; their mutual distance is amazingly small when compared to their size; Charon is half the size of Pluto and the ratio of their masses is much closer to unity than is the case for all other planets and their moons. Moreover, both are small and solid bodies, in contrast to the other, large and gaseous planets in the outer Solar System. We do not know why this is so. But there is another important aspect which makes Pluto and Charon even more interesting: at this very large distance from the Sun, any evolutionary changes happen very slowly. It is therefore likely that Pluto and Charon hold important clues to the conditions that prevailed in the early Solar System and thus to the origin and the evolution of the Solar System as a whole. Long and Difficult Analysis Ahead The present image shows that the overall quality of the new data obtained with the ESA Faint Object Camera on the refurbished Hubble Space Telescope is extremely good. However, such an image represents only the first step of a subsequent, detailed analysis with the ultimate goal of determining

  1. BALALU: Anticipar los cambios en un Software OA

    Directory of Open Access Journals (Sweden)

    Cecilia Andrea Fuentes Zamorano

    2014-06-01

    Full Text Available El mantenimiento y evolución del software muchas veces se vuelve una tarea engorrosa, debido a que el software no se encuentra adecuadamente documentado, o bien las personas destinadas a realizar los cambios no son los propios desarrolladores del software, haciendo que la comprensión del código fuente sea un trabajo complejo. Esto se vuelve más difícil cuando se utilizan aspectos debido a que el código fuente base implícitamente invoca al código de los aspectos. La invocación implícita es especificada por los constructores específicos aspectuales (pointcuts agregando un nivel extra de indirección, que hace más difícil comprender el comportamiento total del software. Diversos problemas como pointcuts frágiles e interacciones entre aspectos se producen fácil e inadvertidamente en la evolución del software orientado a aspectos, ya sea a partir de simples cambios en el código o bien por la aplicación de refactorings. Los desarrolladores deben analizar manualmente el código fuente (de aspectos y clases para identificar estas ocurrencias, agregar más pruebas, en definitiva, se aumentan los costos y esfuerzos durante la evolución y mantenimiento. Consecuentemente, existe la necesidad de plantear estrategias, técnicas y herramientas que permitan a los desarrolladores de software anticipar, analizar y evaluar los efectos e impactos en el software con aspectos, producto de la evolución del software. En este trabajo planteamos como las características de la Programación Orientada a Aspectos (POA mencionadas, inciden negativamente en la evolución y mantenimiento de aplicaciones OA, y proponemos la herramienta BaLaLu cuya finalidad es anticipar las consecuencias que un cambio podrá tener en una aplicación que usa aspectos. La estructura de este informe se encuentra conformada en base a los siguientes elementos que se detallan: la Sección 2 corresponde a una breve introducción a la POA y al Lenguaje Orientado a Aspectos Aspect

  2. Herramientas software para una óptima gestión del proceso de desarrollo de software, a utilizarse en las empresas de software de la provincia de Catamarca

    OpenAIRE

    Haustein, María Carolina; Palliotto, Diana; Korzenieswki, María Isabel

    2013-01-01

    Una de las metas siempre vigente en las empresas desarrolladoras de software, es mejorar el proceso de desarrollo, para lo cual, se fueron fijando y ejecutando distintas estrategias, la más recurrente fue la creación de nuevas metodologías. Hasta que a principios del siglo XXI, se advirtió que lo que fallaba en la gran parte de las empresas, era la gestión en el desarrollo de software, tarea esta, sumamente importante, ya que se encarga de la planificación, asignación de recursos, la document...

  3. Software industrial flexible

    OpenAIRE

    Díaz Araya, Daniel; Muñoz, Leandro; Sirerol, Daniel; Oviedo, Sandra; Ibáñez, Francisco S.

    2012-01-01

    En este trabajo se pretende investigar y proponer técnicas, métodos y tecnologías que permitan el desarrollo de software flexible en ambientes industriales. El objetivo es generar métodos y técnicas para facilitar el desarrollo de software flexible en ambientes industriales. Las áreas de investigación son los sistemas de scheduling de producción, la generación de software para plataformas de hardware abiertas y la innovación.

  4. HST PanCET Program: A Cloudy Atmosphere for the Promising JWST Target WASP-101b

    Energy Technology Data Exchange (ETDEWEB)

    Wakeford, H. R.; Mandell, A. [Planetary Systems Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Stevenson, K. B.; Lewis, N. K. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Sing, D. K.; Evans, T. [Astrophysics Group, Physics Building, University of Exeter, Stocker Road, Exeter EX4 4QL (United Kingdom); López-Morales, M. [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States); Marley, M. [NASA Ames Research Center, MS 245-5, Moffett Field, CA 94035 (United States); Kataria, T. [NASA Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States); Ballester, G. E. [Department of Planetary Sciences and Lunar and Planetary Laboratory, University of Arizona, 1541 E Univ. Boulevard, Tucson, AZ 85721 (United States); Barstow, J. [Physics and Astronomy, University College London, London (United Kingdom); Ben-Jaffel, L. [Institut d’Astrophysique de Paris, CNRS, UMR 7095 and Sorbonne Universités, UPMC Paris 6, 98 bis bd Arago, F-75014 Paris (France); Bourrier, V.; Ehrenreich, D. [Observatoire de l’Université de Genève, 51 chemin des Maillettes, CH-1290 Sauverny (Switzerland); Buchhave, L. A. [Centre for Star and Planet Formation, Niels Bohr Institute and Natural History Museum, University of Copenhagen, Øster Voldgade 5-7, DK-1350 Copenhagen K (Denmark); García Muñoz, A., E-mail: hannah.wakeford@nasa.gov [Zentrum für Astronomie und Astrophysik, Technische Universität Berlin, D-10623 Berlin (Germany); and others

    2017-01-20

    We present results from the first observations of the Hubble Space Telescope (HST) Panchromatic Comparative Exoplanet Treasury program for WASP-101b, a highly inflated hot Jupiter and one of the community targets proposed for the James Webb Space Telescope ( JWST ) Early Release Science (ERS) program. From a single HST Wide Field Camera 3 observation, we find that the near-infrared transmission spectrum of WASP-101b contains no significant H{sub 2}O absorption features and we rule out a clear atmosphere at 13 σ . Therefore, WASP-101b is not an optimum target for a JWST ERS program aimed at observing strong molecular transmission features. We compare WASP-101b to the well-studied and nearly identical hot Jupiter WASP-31b. These twin planets show similar temperature–pressure profiles and atmospheric features in the near-infrared. We suggest exoplanets in the same parameter space as WASP-101b and WASP-31b will also exhibit cloudy transmission spectral features. For future HST exoplanet studies, our analysis also suggests that a lower count limit needs to be exceeded per pixel on the detector in order to avoid unwanted instrumental systematics.

  5. ARQUITECTURA DE SOFTWARE, ESQUEMAS Y SERVICIOS

    Directory of Open Access Journals (Sweden)

    Pedro Ángel Romero

    2006-04-01

    Full Text Available

    Cuando en la industria de software los productos tienen requerimientos cada vez más complejos y dinámicos, y los tiempos para desarrollarlos son cada vez menores; la reutilización y el bajo acoplamiento entre los componentes cobran vital importancia. En este trabajo, partiendo de las definiciones de arquitectura de software y esquema se tratan las características del paradigma de arquitectura orientada a servicios y se exponen algunos elementos significativos que muestran cómo los servicios son la evolución natural de los componentes de software. También se comentan algunas cuestiones a tener en cuenta a la hora de diseñar orientado a servicios.

  6. ¿COLOMBIA DEBE APOSTARLE AL SOFTWARE LIBRE, AL DE FUENTE ABIERTA O AL PROPIETARIO?

    Directory of Open Access Journals (Sweden)

    Luis Alberto Girón Murillo

    2014-06-01

    Full Text Available Es complejo para gestores y administradores conocer las implicaciones que la adopción de modelos de desarrollo de software tendría para una región. Este artículo ofrece una evaluación de las implicaciones dinámicas que para el desarrollo de software de una región tendría el apostar de forma excluyente al software libre, al software de fuente abierta y al software propietario. Se desarrolló un modelo de simulación en Vensim de la dinámica de sistemas en donde se evaluaron 3 escenarios: uno en donde se adopta de forma excluyente el software libre, uno en donde se adopta el software propietario y uno en donde se adopta el software de fuente abierta. Se ofrecen descripciones y explicaciones de los resultados que sugieren las potencialidades de cada uno de los modelos de desarrollo evaluados.

  7. N-body modeling of globular clusters: detecting intermediate-mass black holes by non-equipartition in HST proper motions

    Science.gov (United States)

    Trenti, Michele

    2010-09-01

    Intermediate Mass Black Holes {IMBHs} are objects of considerable astrophysical significance. They have been invoked as possible remnants of Population III stars, precursors of supermassive black holes, sources of ultra-luminous X-ray emission, and emitters of gravitational waves. The centers of globular clusters, where they may have formed through runaway collapse of massive stars, may be our best chance of detecting them. HST studies of velocity dispersions have provided tentative evidence, but the measurements are difficult and the results have been disputed. It is thus important to explore and develop additional indicators of the presence of an IMBH in these systems. In a Cycle 16 theory project we focused on the fingerprints of an IMBH derived from HST photometry. We showed that an IMBH leads to a detectable quenching of mass segregation. Analysis of HST-ACS data for NGC 2298 validated the method, and ruled out an IMBH of more than 300 solar masses. We propose here to extend the search for IMBH signatures from photometry to kinematics. The velocity dispersion of stars in collisionally relaxed stellar systems such as globular clusters scales with main sequence mass as sigma m^alpha. A value alpha = -0.5 corresponds to equipartition. Mass-dependent kinematics can now be measured from HST proper motion studies {e.g., alpha = -0.21 for Omega Cen}. Preliminary analysis shows that the value of alpha can be used as indicator of the presence of an IMBH. In fact, the quenching of mass segregation is a result of the degree of equipartition that the system attains. However, detailed numerical simulations are required to quantify this. Therefore we propose {a} to carry out a new, larger set of realistic N-body simulations of star clusters with IMBHs, primordial binaries and stellar evolution to predict in detail the expected kinematic signatures and {b} to compare these predictions to datasets that are {becoming} available. Considerable HST resources have been invested in

  8. The Mega-MUSCLES HST Treasury Survey

    Science.gov (United States)

    Froning, Cynthia S.; France, Kevin; Loyd, R. O. Parke; Youngblood, Allison; Brown, Alexander; Schneider, Christian; Berta-Thompson, Zachory; Kowalski, Adam

    2018-01-01

    JWST will be able to observe the atmospheres of rocky planets transiting nearby M dwarfs. A few such planets are already known (around GJ1132, Proxima Cen, and Trappist-1) and TESS is predicted to find many more, including ~14 habitable zone planets. To interpret observations of these exoplanets' atmospheres, we must understand the high-energy SED of their host stars: X-ray/EUV irradiation can erode a planet's gaseous envelope and FUV/NUV-driven photochemistry shapes an atmosphere's molecular abundances, including potential biomarkers like O2, O3, and CH4. Our MUSCLES Treasury Survey (Cycles 19+22) used Hubble/COS+STIS UV observations with contemporaneous X-ray and ground-based data to construct complete SEDs for 11 low-mass exoplanet hosts. MUSCLES is the most widely used database for early-M and K dwarf (>0.3 M_sun) irradiance spectra and has supported a wide range of atmospheric stability and biomarker modeling work. However, TESS will find most of its habitable planets transiting stars less massive than this, and these will be the planets to characterize with JWST. Here, we introduce the Mega-MUSCLES project, an approved HST Cycle 25 Treasury program. Following on the successful MUSCLES survey, Mega-MUSCLES will expand our target list to focus on: (a) new M dwarf exoplanet hosts with varying properties; (b) reference M dwarfs below 0.3 solar masses that may be used as proxies for M dwarf planet hosts discovered after HST's lifetime; and (c) more rapidly rotating stars of GJ1132's mass to probe XUV evolution over gigayear timescales. We will also gather the first panchromatic SEDs of rocky planet hosts GJ1132 and Trappist-1. Here, we present an overview of the Mega-MUSCLES motivation, targets list, and status of the survey and show how it extends proven methods to a key new sample of stars, upon which critically depends the long-term goal of studying habitable planet atmospheres with JWST and beyond.

  9. Socio-Cultural Challenges in Global Software Engineering Education

    Science.gov (United States)

    Hoda, Rashina; Babar, Muhammad Ali; Shastri, Yogeshwar; Yaqoob, Humaa

    2017-01-01

    Global software engineering education (GSEE) is aimed at providing software engineering (SE) students with knowledge, skills, and understanding of working in globally distributed arrangements so they can be prepared for the global SE (GSE) paradigm. It is important to understand the challenges involved in GSEE for improving the quality and…

  10. Armonización de modelos de calidad del software

    Directory of Open Access Journals (Sweden)

    Gabriel Alberto Garcia Mireles

    2013-06-01

    Full Text Available La tendencia actual entre las organizaciones que desarrollan software es la adopción de más de un modelo de calidad para estar en condiciones de competir en diversos sectores del mercado. En esa situación, las organizaciones se enfrentan al problema de coordinar la implantación de múltiples modelos de tal manera que cada modelo logre los beneficios esperados, y al mismo tiempo, que los costos y esfuerzo de implantación sean mínimos. Como respuesta a este problema, surge la armonización de modelos de calidad del software. Actualmente los estudios se centran en la composición de modelos de calidad que abordan prácticas del proceso de desarrollo de software. Sin embargo, las organizaciones también deberían considerar la perspectiva de la calidad del producto. En este artículo, se presenta un avance de la investigación en la armonización de modelos de calidad que toma en cuenta ambas perspectivas, proceso y producto. Se describe la técnica que se propuso para realizar comparaciones de bajo nivel en este contexto. La técnica se aplica en los modelos CMMI-DEV, ISO 12207 e ISO 25010 y, como resultado, se encuentra que los modelos que abordan la perspectiva de proceso contienen prácticas, que corresponden a las etapas de análisis y diseño de software, en donde se debería prestar más atención a la calidad del producto de software.

  11. Calidad de software: Actividades en curso para contribuir al desarrollo de la industria del software en la región NEA

    OpenAIRE

    Estayno, Marcelo G.; Dapozo, Gladys N.; Cuenca Pletsch, Liliana Raquel; Greiner, Cristina L.; Medina, Yenisley; Tomaselli, G.; Chica, N.; Bernal, N.; Méndez, G.

    2010-01-01

    Este trabajo describe los resultados preliminares y las actividades de investigación y desarrollo que se llevan a cabo en el marco del proyecto mencionado. Se realizó un estudio de las características de las pymes de software de la región que se utilizará como marco de referencia de las actividades del proyecto, se definieron propuestas metodológicas orientadas a la vinculación entre las universidades participantes y las empresas de software nucleadas en polos tecnológicos que dieron lugar...

  12. El movimiento del software libre

    OpenAIRE

    Prudencio Óscar Mochi Alemán

    2002-01-01

    El objetivo de este trabajo es describir el surgimiento y desarrollo del movimiento de software libre. Para ello se analizan algunas características importantes que dan cuenta del origen y desarrollo del mismo, así como de sus momentos más críticos y sus tensiones, sus desafíos y sus retos. Otra de las grandes inquietudes de este trabajo, es intentar descifrar cómo el movimiento del software libre y Linux, en su versión más conocida, sobrevivieron y se afirmaron hasta llegar a ...

  13. EDITORIAL: Para mejorar la calidad del software

    Directory of Open Access Journals (Sweden)

    Edgar Serna M.

    2015-12-01

    Full Text Available Se podría decir que somos software-dependientes, porque como sociedad moderna la mayoría de nuestras actividades y relaciones están condicionadas por, o dependen de, este desarrollo tecnológico. Pero de acuerdo con los organismos encargados de su control y los mismos usuarios, al parecer los procedimientos con los cuales se produce todavía no han superado la llamada crisis del software de los años 60, y se continúa entregando con deficiencias en calidad, seguridad y fiabilidad

  14. Monitoring of CH Cyg requested for Chandra and HST observations

    Science.gov (United States)

    Waagen, Elizabeth O.

    2012-03-01

    Dr. Margarita Karovska, Harvard-Smithsonian Center for Astrophysics, has requested visual and photometric observations of the symbiotic variable CH Cyg in preparation for and support of Chandra and HST observations scheduled for later in March 2012. Dr. Karovska's observations will be a followup investigation of the central region of CH Cyg and its jet that was discovered a couple of years ago. AAVSO observations are requested in order to monitor the state of the system and correlate with the satellite observations. Visual observations and CCD/PEP observations in all bands - U through J and H - are requested. Daily observations now through April 2012 and high-speed photometry through March would be appreciated. CH Cyg is currently at visual magnitude 7.7. Halpha, OIII region, and optical spectroscopy are also requested. More details on the exact dates and times of the satellite observations will be announced when they become available, but daily monitoring should begin now. [HST observations scheduled for 2012 March 18; Chandra delayed some days due to X-class solar flare of 2012 March 7.] Coordinates: RA 19 24 33.07 Dec. +50 14 29.1 (J2000.0). Finder charts may be created and data from the AAVSO International Database may be viewed, plotted, or downloaded (www.aavso.org).

  15. Ingeniería dirigida por modelos y calidad de software

    OpenAIRE

    Ruiz-Rube, Iván

    2014-01-01

    La gestión de la calidad del software tiene por objetivo planificar, asegurar, controlar y mejorar la calidad del software que se desarrolla o se mantiene. Sin embargo, suele ser habitual que no se le dediquen los esfuerzos y recursos necesarios para su puesta en marcha, aludiendo a que las actividades de gestión de la calidad no conducen a producir software. Por este motivo, es importante investigar nuevas maneras de llevar a cabo actividades de calidad, con el menor esfuerzo posible. En...

  16. DISEÑO DE SOFTWARE EDUCATIVO BASADO EN COMPETENCIAS

    Directory of Open Access Journals (Sweden)

    Manuel Fernando Caro Piñeres

    2009-01-01

    Full Text Available El presente artículo describe un modelo de diseño de software educativo basado en competencias, el cual presenta una visión integral del desarrollo de estas aplicaciones mediante la combinación de componentes pedagógicos, didácticos, multimediales y de ingeniería de software. El modelo sugerido se compone de cinco fases que detallan paso a paso los aspectos que se deben tener en cuenta para la creación de softwareeducativo. La fase inicial constituye la descripción del diseño educativo, en la cual se analiza la necesidad educativa, se plantean los objetivos de aprendizaje y se describen las competencias que se pretenden desarrollar con la aplicación; del diseño de éstas resultan las siguientes subfases: diseño de contenidos, diseño pedagógico y diseño de aprendizaje. Las competencias son el aspecto fundamental que abarca el desarrollo de este modelo, las cuales son primordiales para la realización de las fases a seguir conformadas por el diseño computacional y el diseño multimedial, estas se encargan del análisis y modelado del software, y del sistema de comunicación hombre-máquina. En la fase de producción se ensamblan los componentes elaborados o recolectados, según el caso. La última fase es la de aplicación, donde se hacen las pruebas de rigor para evaluar el desempeño del software en los contextos para los que fue desarrollado.

  17. Software del sistema osteomioarticular

    Directory of Open Access Journals (Sweden)

    Dianelys León Medina

    2015-06-01

    Full Text Available Introducción: la aplicación en la enseñanza de las Tecnologías de la Informática y las Comunicaciones, es una de las líneas que ha trazado el sistema de salud cubano en estudiantes de las ciencias médicas. La anatomía es una de las ciencias que integra la disciplina de Morfofisiología y para facilitar su comprensión resulta necesario el empleo de recursos y estrategias, entre los que puede figurar un software educativo. Objetivo: diseñar un software sobre la anatomía del sistema osteomioarticular de cabeza y cuello para los estudiantes de primer año de la carrera de Estomatología de Pinar del Río. Material y método: se realizó un estudio cualitativo. Para obtener los resultados se utilizó el método materialista dialéctico. Para la dialéctica del desarrollo del proceso estudiado se utilizaron los métodos teóricos, empíricos, el estudio profundo del tema, tipo de plataforma a utilizar y criterios de los especialistas. Para su procesamiento se utilizaron técnicas estadísticas descriptivas e inferenciales no paramétricas. Resultados: debido a la necesidad de fortalecer en los estudiantes las habilidades en la utilización de las tecnologías de la informática y las comunicaciones, se elaboró el software de la anatomía del sistema osteomioarticular de cabeza y cuello "Aprendiendo anatomía" mediante imágenes, videos y textos. Conclusiones: el software constituye un aporte al proceso enseñanza aprendizaje, el cual facilita el trabajo independiente y autopreparación mediante la interactividad con el contenido, retroalimentación y evaluación utilizando medios de enseñanza modernos, lo cual tributa al modo de actuación del futuro egresado.

  18. Señas Mexicano

    Directory of Open Access Journals (Sweden)

    Juan F. García Mejía

    2007-01-01

    Full Text Available En este artículo se muestra un sistema que permite el estudio y práctica del Lenguaje de Señas Mexicano (LMS, el cual es el método de comunicación de las personas que padecen un trastorno de procesamiento auditivo. El sistema propuesto en este artículo consta de un guante de tela instrumentado con sensores de flexión, una etapa de acondicionamiento de señales y una tarjeta de adquisición de datos; que en su conjunto constituyen el Hardware. El software esta formado por un programa de adquisición de datos y una interfaz de usuario, ambos codificados en Visual Basic Net. El sistema propuesto se modela por medio del lenguaje de modelado unificado (UML, ya que Visual Basic es un lenguaje orientado a eventos.

  19. The HST/ACS Coma Cluster Survey : II. Data Description and Source Catalogs

    NARCIS (Netherlands)

    Hammer, Derek; Kleijn, Gijs Verdoes; Hoyos, Carlos; den Brok, Mark; Balcells, Marc; Ferguson, Henry C.; Goudfrooij, Paul; Carter, David; Guzman, Rafael; Peletier, Reynier F.; Smith, Russell J.; Graham, Alister W.; Trentham, Neil; Peng, Eric; Puzia, Thomas H.; Lucey, John R.; Jogee, Shardha; Aguerri, Alfonso L.; Batcheldor, Dan; Bridges, Terry J.; Chiboucas, Kristin; Davies, Jonathan I.; del Burgo, Carlos; Erwin, Peter; Hornschemeier, Ann; Hudson, Michael J.; Huxor, Avon; Jenkins, Leigh; Karick, Arna; Khosroshahi, Habib; Kourkchi, Ehsan; Komiyama, Yutaka; Lotz, Jennifer; Marzke, Ronald O.; Marinova, Irina; Matkovic, Ana; Merritt, David; Miller, Bryan W.; Miller, Neal A.; Mobasher, Bahram; Mouhcine, Mustapha; Okamura, Sadanori; Percival, Sue; Phillipps, Steven; Poggianti, Bianca M.; Price, James; Sharples, Ray M.; Tully, R. Brent; Valentijn, Edwin

    The Coma cluster, Abell 1656, was the target of an HST-ACS Treasury program designed for deep imaging in the F475W and F814W passbands. Although our survey was interrupted by the ACS instrument failure in early 2007, the partially completed survey still covers ~50% of the core high-density region in

  20. Propuesta de un proceso de enseñanza-aprendizaje para la asignatura Diseño de Software como proceso de software

    Directory of Open Access Journals (Sweden)

    Lund, María Inés

    2014-04-01

    Full Text Available La cátedra Diseño de Software se dicta actualmente en 4º año de las carreras del Departamento de Informática de la Facultad de Ciencias Exactas, Físicas y Naturales (FCEFN de la Universidad Nacional de San Juan (UNSJ. Esta materia se enfoca principalmente al Diseño Orientado a Objetos (DOO, brindando conceptos y conocimientos desarrollados en forma teórica y con un fuerte componente práctico, de todos los diagramas de modelado de software que provee el Lenguaje de Modelado Unificado (UML, con el fin de comprender acabadamente el objetivo que se persigue con cada uno de ellos y en qué casos es conveniente o útil aplicarlos. El presente trabajo se sustenta de la experiencia adquirida en la práctica aplicada para la enseñanza de DOO, utilizando UML para el modelado, donde las actividades prácticas abarcan desde el análisis hasta llegar a una propuesta de diseño de implementación. Se presenta un modelo de proceso de enseñanza aprendizaje, como proceso de software, y los artefactos utilizados para guiar al alumno en la resolución de un problema de desarrollo de software específico, utilizando para su especificación el lenguaje de metamodelado de procesos SPEM 2.0 y para generar el modelado del proceso de software la herramienta Eclipse Process Framework Composer (EPFC.

  1. THE TIME EVOLUTION OF HH 1 FROM FOUR EPOCHS OF HST IMAGES

    Energy Technology Data Exchange (ETDEWEB)

    Raga, A. C.; Esquivel, A. [Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Ap. 70-543, 04510 D.F., México (Mexico); Reipurth, B. [Institute for Astronomy, University of Hawaii at Manoa, Hilo, HI 96720 (United States); Bally, J., E-mail: raga@nucleares.unam.mx [Center for Astrophysics and Space Astronomy, University of Colorado, UCB 389, Boulder, CO 80309 (United States)

    2016-05-15

    We present an analysis of four epochs of Hα and [S ii] λλ 6716/6731 Hubble Space Telescope (HST) images of HH 1. For determining proper motions, we explore a new method based on the analysis of spatially degraded images obtained convolving the images with wavelet functions of chosen widths. With this procedure, we are able to generate maps of proper motion velocities along and across the outflow axis, as well as (angularly integrated) proper motion velocity distributions. From the four available epochs, we find the time evolution of the velocities, intensities, and spatial distribution of the line emission. We find that over the last two decades HH 1 shows a clear acceleration. Also, the Hα and [S ii] intensities first dropped and then recovered in the more recent (2014) images. Finally, we show a comparison between the two available HST epochs of [O iii] λ 5007 (1994 and 2014), in which we see a clear drop in the value of the [O iii]/Hα ratio.

  2. Calibration Efforts and Unique Capabilities of the HST Space Telescope Imaging Spectrograph

    Science.gov (United States)

    Monroe, TalaWanda R.; Proffitt, Charles R.; Welty, Daniel; Branton, Doug; Carlberg, Joleen K.; debes, John Henry; Lockwood, Sean; Riley, Allyssa; Sohn, Sangmo Tony; Sonnentrucker, Paule G.; Walborn, Nolan R.; Jedrzejewski, Robert I.

    2018-01-01

    The Space Telescope Imaging Spectrograph (STIS) continues to offer the astronomy community the ability to carry out innovative UV and optical spectroscopic and imaging studies, two decades after its deployment on the Hubble Space Telescope (HST). Most notably, STIS provides spectroscopy in the FUV and NUV, including high spectral resolution echelle modes, imaging in the FUV, optical spectroscopy, and coronagraphic capabilities. Additionally, spatial scanning on the CCD with the long-slits is now possible to enable very high S/N spectroscopic observations without saturation while mitigating telluric and fringing concerns in the far red and near-IR. This new mode may especially benefit the diffuse interstellar bands and exoplanet transiting communities. We present recent calibration efforts for the instrument, including work to optimize the calibration of the echelle spectroscopic modes by improving the flux agreement of overlapping spectral orders affected by changes in the grating blaze function since HST Servicing Mission 4. We also discuss considerations to maintain the wavelength precision of the spectroscopic modes, and the current capabilities of CCD spectroscopic spatial trails.

  3. EL SOFTWARE LIBRE Y SUS IMPLICACIONES JURÍDICAS

    Directory of Open Access Journals (Sweden)

    Gladys Stella Rodríguez

    2008-01-01

    (hardware, software, conocimientos, entre otros. Sólo que esta práctica se ha desnaturalizado creando riesgos de mantenerse el conocimiento y su acceso a un grupo selecto hegemónico. En consecuencia, hoy existe la posibilidad de que a través de licencias públicas generales se consagren derechos a los autores, en un marco de mayor flexibilidad (copyleft. La metodología es descriptiva - explicativa, con una revisión bibliográfica y hemerográficas sobre el tema. Asimismo, se consultó a Fundación para la Ciencia y la Tecnología (FUNDACITE ZULIA, a través de la Misión Ciencia. Se concluye que el software libre es una oportunidad para democratizar el acceso a la información en países en desarrollo, y es un reto para el desarrollador de softwares.

  4. Herramientas libres para modelar software Free tools to model software

    Directory of Open Access Journals (Sweden)

    Mauro Callejas Cuervo Óscar Yovany Baquero Moreno

    2010-11-01

    Full Text Available Observación acerca del  software libre y de suimplicación en procesos de desarrollo de  softwarecon herramientas 4G por parte de entidades opersonas sin capitales astronómicos y sin lamentalidad acaparadora de dominar el mercado conproductos costosos que las hagan multimillonarias yque no ofrecen una garantía real, ni la posibilidadsiquiera de conocer el  software por el que se hapagado, y mucho menos de modificarlo si no cumplenuestras expectativas.

  5. CONSIDERACIONES RELACIONADAS CON LAS INSPECCIONES DE SOFTWARE

    Directory of Open Access Journals (Sweden)

    Bexy Alfonso Espinosa

    2006-04-01

    Full Text Available

     

     

    Las consideraciones que en el presente trabajo se reflejan están enfocadas a enfatizar la importancia y necesidad de la aplicación de técnicas de verificación como las inspecciones de software, en la industria de software. Especialmente si de pequeñas y medianas empresas se trata pues en ellas recae la responsabilidad de lograr una industria de software de excelencia y con la calidad requerida en países en vías de desarrollo. Se analizan además, una serie de autores y las investigaciones que han realizado relativas a la concepción del proceso de inspección de software y los recursos y personal que deben tenerse en cuenta para ello.

  6. VizieR Online Data Catalog: Ultradiffuse galaxies found in deep HST images of HFF (Lee+, 2017)

    Science.gov (United States)

    Lee, M. G.; Kang, J.; Lee, J. H.; Jang in, S.

    2018-03-01

    Abell S1063 and Abell 2744 are located at redshift z=0.348 and z=0.308, respectively, so their HST fields cover a relatively large fraction of each cluster. They are part of the target galaxy clusters in the Hubble Frontier Fields (HFF) Program, for which deep Hubble Space Telescope (HST) images are available (Lotz+ 2017ApJ...837...97L). We used ACS/F814W(I) and WFC3/F105W(Y) images for Abell S1063 and Abell 2744 in the HFF. The effective wavelengths of the F814W and F105W filters for the redshifts of Abell S1063 and Abell 2744 (6220 and 8030Å) correspond approximately to SDSS r' and Cousins I (or SDSS i') in the rest frame, respectively. Figure 1 display color images of the HST fields for Abell S1063 and Abell 2744. In this study we adopt the cosmological parameters H0=73km/s/Mpc, ΩM=0.27, and ΩΛ=0.73. For these parameters, luminosity distance moduli of Abell S1063 and Abell 2744 are (m-M)0=41.25 (d=1775Mpc) and 40.94 (d=1540Mpc), and angular diameter distances are 978 and 901Mpc, respectively. (5 data files).

  7. A Multidimensional Software Engineering Course

    Science.gov (United States)

    Barzilay, O.; Hazzan, O.; Yehudai, A.

    2009-01-01

    Software engineering (SE) is a multidimensional field that involves activities in various areas and disciplines, such as computer science, project management, and system engineering. Though modern SE curricula include designated courses that address these various subjects, an advanced summary course that synthesizes them is still missing. Such a…

  8. Data Analysis Details (DS): SE53_DS03 [Metabolonote[Archive

    Lifescience Database Archive (English)

    Full Text Available SE53_DS03 In-house software An original data file (.wiff) was converted to an uniqu...e binary file (.kiff) using in-house software (nondisclosure). Peak picking and alignment were performed usi...s including internal standards, peaks were annotated automatically using the same software. For normalizatio...ng the another in-house software (nondisclosure), peaks were picked and aligned among samples automatically.

  9. A CLASSROOM GAME FOR TEACHING MANAGEMENT OF SOFTWARE COMPANIES

    Directory of Open Access Journals (Sweden)

    CARLOS M. ZAPATA

    2010-01-01

    Full Text Available La gestión en ingeniería de software necesita algunas destrezas especiales. A menudo, esas destrezas no se pueden desarrollar a partir de los métodos tradicionales de enseñanza. Otras disciplinas administrativas usan aprendizaje activo (v. g. aprendizaje mediante juegos para desarrollar esas destrezas, pero los profesores en ingeniería de software no suelen conducir experiencias similares. En este artículo se propone un juego de clase para simular el comportamiento de varios roles pertenecientes a una compañía de software. Nuestra meta es la "práctica", en un ambiente similar al entorno real, de las destrezas que requieren los miembros de los equipos de desarrollo de software. Además, se compendian los resultados de la práctica del juego con dos grupos de estudiantes.

  10. Diseño de software interactivo en las matemáticas

    Directory of Open Access Journals (Sweden)

    María Nivela Cornejo

    2018-02-01

    Full Text Available El propósito de esta investigación fue crear un Software Educativo que permita la integración del uso de las matemáticas al Aprendizaje Significativo. La investigación está marcada en documental y campo. El método utilizado fue el estudio de casos. El procedimiento que se llevó a cabo en esta investigación se dividió en tres fases: (a Análisis, se investigaron y analizaron las teorías, estrategias y etapas que existen para el desarrollo de software educativo. (b Diseño del Software Educativo, se planteó la incorporación del computador como instrumento para el aprendizaje de la informática a través del software educativo. (c Implantación y evaluación. Las técnicas e instrumentos utilizados para recolección de datos fueron la entrevista semiestructuradas, la observación participativa y las evidencias documentales. Los resultados que se obtuvieron permitieron verificar la factibilidad que tuvo el software educativo en el Aprendizaje Significativo de las matemáticas.

  11. What information do software engineering practitioners need?

    OpenAIRE

    Punter, T.

    2003-01-01

    This position paper addresses an important question for the discipline of Empirical or Evidence-based Software Engineering (SE), namely ´what information do software engineering practitioners need from the empirical studies´. The paper contributes to answering this question by presenting survey results on two sub-questions: 1) what are the topics that interest practitioners? and 2) what type of information is needed by practitioners? Answering the first question results in a set of SE topics,...

  12. Galaxy Environment in the 3D-HST Fields: Witnessing the Onset of Satellite Quenching at z ˜ 1-2

    Science.gov (United States)

    Fossati, M.; Wilman, D. J.; Mendel, J. T.; Saglia, R. P.; Galametz, A.; Beifiori, A.; Bender, R.; Chan, J. C. C.; Fabricius, M.; Bandara, K.; Brammer, G. B.; Davies, R.; Förster Schreiber, N. M.; Genzel, R.; Hartley, W.; Kulkarni, S. K.; Lang, P.; Momcheva, I. G.; Nelson, E. J.; Skelton, R.; Tacconi, L. J.; Tadaki, K.; Übler, H.; van Dokkum, P. G.; Wisnioski, E.; Whitaker, K. E.; Wuyts, E.; Wuyts, S.

    2017-02-01

    We make publicly available a catalog of calibrated environmental measures for galaxies in the five 3D-Hubble Space Telescope (HST)/CANDELS deep fields. Leveraging the spectroscopic and grism redshifts from the 3D-HST survey, multiwavelength photometry from CANDELS, and wider field public data for edge corrections, we derive densities in fixed apertures to characterize the environment of galaxies brighter than {{JH}}140< 24 mag in the redshift range 0.5< z< 3.0. By linking observed galaxies to a mock sample, selected to reproduce the 3D-HST sample selection and redshift accuracy, each 3D-HST galaxy is assigned a probability density function of the host halo mass, and a probability that it is a central or a satellite galaxy. The same procedure is applied to a z = 0 sample selected from Sloan Digital Sky Survey. We compute the fraction of passive central and satellite galaxies as a function of stellar and halo mass, and redshift, and then derive the fraction of galaxies that were quenched by environment specific processes. Using the mock sample, we estimate that the timescale for satellite quenching is {t}{quench}˜ 2{--}5 {Gyr}; it is longer at lower stellar mass or lower redshift, but remarkably independent of halo mass. This indicates that, in the range of environments commonly found within the 3D-HST sample ({M}h≲ {10}14 {M}⊙ ), satellites are quenched by exhaustion of their gas reservoir in the absence of cosmological accretion. We find that the quenching times can be separated into a delay phase, during which satellite galaxies behave similarly to centrals at fixed stellar mass, and a phase where the star formation rate drops rapidly ({τ }f˜ 0.4{--}0.6 Gyr), as shown previously at z = 0. We conclude that this scenario requires satellite galaxies to retain a large reservoir of multi-phase gas upon accretion, even at high redshift, and that this gas sustains star formation for the long quenching times observed.

  13. A CANDELS-3D-HST synergy : Resolved Star Formation Patterns at 0.7

    NARCIS (Netherlands)

    Wuyts, S.; , van, Dokkum P.G.; , van der, Wel A.

    2013-01-01

    We analyze the resolved stellar populations of 473 massive star-forming galaxies at 0.7 {lt} z {lt} 1.5, with multi-wavelength broadband imaging from CANDELS and H{$α$} surface brightness profiles at the same kiloparsec resolution from 3D-HST. Together, this unique data set sheds light on how the

  14. 3D-HST GRISM SPECTROSCOPY OF A GRAVITATIONALLY LENSED, LOW-METALLICITY STARBURST GALAXY AT z = 1.847

    International Nuclear Information System (INIS)

    Brammer, Gabriel B.; Sánchez-Janssen, Rubén; Labbé, Ivo; Franx, Marijn; Fumagalli, Mattia; Patel, Shannon; Da Cunha, Elisabete; Rix, Hans-Walter; Schmidt, Kasper B.; Van der Wel, Arjen; Erb, Dawn K.; Lundgren, Britt; Momcheva, Ivelina; Nelson, Erica; Skelton, Rosalind E.; Van Dokkum, Pieter G.; Wake, David A.; Whitaker, Katherine E.; Marchesini, Danilo; Quadri, Ryan

    2012-01-01

    We present Hubble Space Telescope (HST) imaging and spectroscopy of the gravitational lens SL2SJ02176-0513, a cusp arc at z = 1.847. The UV continuum of the lensed galaxy is very blue, which is seemingly at odds with its redder optical colors. The 3D-HST WFC3/G141 near-infrared spectrum of the lens reveals the source of this discrepancy to be extremely strong [O III] λ5007 and Hβ emission lines with rest-frame equivalent widths of 2000 ± 100 and 520 ± 40 Å, respectively. The source has a stellar mass ∼10 8 M ☉ , sSFR ∼ 100 Gyr –1 , and detection of [O III] λ4363 yields a metallicity of 12 + log (O/H) = 7.5 ± 0.2. We identify local blue compact dwarf analogs to SL2SJ02176-0513, which are among the most metal-poor galaxies in the Sloan Digital Sky Survey. The local analogs resemble the lensed galaxy in many ways, including UV/optical spectral energy distribution, spatial morphology, and emission line equivalent widths and ratios. Common to SL2SJ02176-0513 and its local counterparts is an upturn at mid-IR wavelengths likely arising from hot dust heated by starbursts. The emission lines of SL2SJ02176-0513 are spatially resolved owing to the combination of the lens and the high spatial resolution of HST. The lensed galaxy is composed of two clumps with combined size r e ∼300 pc, and we resolve significant differences in UV color and emission line equivalent width between them. Though it has characteristics occasionally attributed to active galactic nuclei, we conclude that SL2SJ02176-0513 is a low-metallicity star-bursting dwarf galaxy. Such galaxies will be found in significant numbers in the full 3D-HST grism survey.

  15. Software configuration management plan for the Hanford site technical database

    International Nuclear Information System (INIS)

    GRAVES, N.J.

    1999-01-01

    The Hanford Site Technical Database (HSTD) is used as the repository/source for the technical requirements baseline and programmatic data input via the Hanford Site and major Hanford Project Systems Engineering (SE) activities. The Hanford Site SE effort has created an integrated technical baseline for the Hanford Site that supports SE processes at the Site and project levels which is captured in the HSTD. The HSTD has been implemented in Ascent Logic Corporation (ALC) Commercial Off-The-Shelf (COTS) package referred to as the Requirements Driven Design (RDD) software. This Software Configuration Management Plan (SCMP) provides a process and means to control and manage software upgrades to the HSTD system

  16. Taxonomía de riesgos de outsourcing de software Software outsourcing risk taxonomy

    Directory of Open Access Journals (Sweden)

    Gloria Piedad Gasca-Hurtado

    2013-04-01

    Full Text Available Para las organizaciones la estrategia de outsourcing de software (OS se ha constituido en una alternativa estratégica de reducción de costos y mejora de la calidad de software. Sin embargo, la complejidad de la gestión de este tipo de proyectos aumenta, debido a la relación de actores diferentes (cliente y proveedor, de la cual depende en gran medida el éxito de estos proyectos. Identificar, analizar y gestionar los riesgos que afectan este tipo de proyectos, son buenas prácticas que se pueden llevar a cabo para establecer indicadores de gestión claves para el éxito de los proyectos. Es por esta razón que el objetivo de este trabajo es diseñar una taxonomía de riesgos de OS, es decir, una estructura de clasificación jerárquica de riesgos basada en los proyectos de OS que facilite la identificación de riesgos, que contribuya a la realización de un análisis de riesgos ágil y preciso, para su posterior gestión a lo largo de todo el proceso de OS. La taxonomía que se propone ha sido validada en un caso de estudio correspondiente a un proyecto de compra de software preelaborado. Los resultados se muestran en la última parte de este trabajo y se analiza la forma como dichos resultados impacta el proyecto en el cual fue implementada la taxonomía y su utilidad en el refinamiento de los procesos organizacionales de la empresa, a partir de las lecciones aprendidas.In recent years, the software outsourcing (SO strategy for organizations has become a useful and important alternative, as well as SO projects. SO projects have many complexities due to several factors affecting management. These complexities and importance of SO require that successfull projects meet a parameter set: budget, cost, schedule, among others. This requirement can be met through the implementation of methods and techniques of risk management (RM. RM is a process to prevent problems, establish actions to follow, and monitor the project to ensure success. Likewise

  17. Cosmic shear analysis of archival HST/ACS data. I. Comparison of early ACS pure parallel data to the HST/GEMS survey

    Science.gov (United States)

    Schrabback, T.; Erben, T.; Simon, P.; Miralles, J.-M.; Schneider, P.; Heymans, C.; Eifler, T.; Fosbury, R. A. E.; Freudling, W.; Hetterscheidt, M.; Hildebrandt, H.; Pirzkal, N.

    2007-06-01

    Context: This is the first paper of a series describing our measurement of weak lensing by large-scale structure, also termed “cosmic shear”, using archival observations from the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope (HST). Aims: In this work we present results from a pilot study testing the capabilities of the ACS for cosmic shear measurements with early parallel observations and presenting a re-analysis of HST/ACS data from the GEMS survey and the GOODS observations of the Chandra Deep Field South (CDFS). Methods: We describe the data reduction and, in particular, a new correction scheme for the time-dependent ACS point-spread-function (PSF) based on observations of stellar fields. This is currently the only technique which takes the full time variation of the PSF between individual ACS exposures into account. We estimate that our PSF correction scheme reduces the systematic contribution to the shear correlation functions due to PSF distortions to MUSIC sample, we determine a local single field estimate for the mass power spectrum normalisation σ8, CDFS=0.52+0.11-0.15 (stat) ± 0.07(sys) (68% confidence assuming Gaussian cosmic variance) at a fixed matter density Ω_m=0.3 for a ΛCDM cosmology marginalising over the uncertainty of the Hubble parameter and the redshift distribution. We interpret this exceptionally low estimate to be due to a local under-density of the foreground structures in the CDFS. Based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the data archives at the Space Telescope European Coordinating Facility and the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.

  18. Using modern imaging techniques to old HST data: a summary of the ALICE program.

    Science.gov (United States)

    Choquet, Elodie; Soummer, Remi; Perrin, Marshall; Pueyo, Laurent; Hagan, James Brendan; Zimmerman, Neil; Debes, John Henry; Schneider, Glenn; Ren, Bin; Milli, Julien; Wolff, Schuyler; Stark, Chris; Mawet, Dimitri; Golimowski, David A.; Hines, Dean C.; Roberge, Aki; Serabyn, Eugene

    2018-01-01

    Direct imaging of extrasolar systems is a powerful technique to study the physical properties of exoplanetary systems and understand their formation and evolution mechanisms. The detection and characterization of these objects are challenged by their high contrast with their host star. Several observing strategies and post-processing algorithms have been developed for ground-based high-contrast imaging instruments, enabling the discovery of directly-imaged and spectrally-characterized exoplanets. The Hubble Space Telescope (HST), pioneer in directly imaging extrasolar systems, has yet been often limited to the detection of bright debris disks systems, with sensitivity limited by the difficulty to implement an optimal PSF subtraction stategy, which is readily offered on ground-based telescopes in pupil tracking mode.The Archival Legacy Investigations of Circumstellar Environments (ALICE) program is a consistent re-analysis of the 10 year old coronagraphic archive of HST's NICMOS infrared imager. Using post-processing methods developed for ground-based observations, we used the whole archive to calibrate PSF temporal variations and improve NICMOS's detection limits. We have now delivered ALICE-reprocessed science products for the whole NICMOS archival data back to the community. These science products, as well as the ALICE pipeline, were used to prototype the JWST coronagraphic data and reduction pipeline. The ALICE program has enabled the detection of 10 faint debris disk systems never imaged before in the near-infrared and several substellar companion candidates, which we are all in the process of characterizing through follow-up observations with both ground-based facilities and HST-STIS coronagraphy. In this publication, we provide a summary of the results of the ALICE program, advertise its science products and discuss the prospects of the program.

  19. SPEM: Software Process Engineering Metamodel

    Directory of Open Access Journals (Sweden)

    Víctor Hugo Menéndez Domínguez

    2015-05-01

    Full Text Available Todas las organizaciones involucradas en el desarrollo de software necesitan establecer, gestionar y soportar el trabajo de desarrollo. El término “proceso de desarrollo de software” tiende a unificar todas las actividades y prácticas que cubren esas necesidades. Modelar el proceso de software es una forma para mejorar el desarrollo y la calidad de las aplicaciones resultantes. De entre todos los lenguajes existentes para el modelado de procesos, aquellos basados en productos de trabajo son los más adecuados. Uno de tales lenguajes es SPEM (Software Process Engineering Metamodel. SPEM fue creado por OMG (Object Management Group como un estándar de alto nivel, que está basado en MOF (MetaObject Facility y es un metamodelo UML (Uniform Model Language. Constituye un tipo de ontología de procesos de desarrollo de software. En este artículo se ofrece una descripción, en términos generales, del estándar SPEM. También se destacan los cambios que ha experimentado entre la versión 1.1 y la versión 2.0, presentando tanto las ventajas como las desventajas encontradas entre ambas versiones.

  20. The SE Book: Principles and Techniques of Software Engineering or orAn ABZ of The Theory & Practice of Software Engineering

    DEFF Research Database (Denmark)

    Bjørner, Dines

    ) the TripTych of domain analysis, requirements engineering and software design -- and much much more. It relates all aspects of (12) platform technologies, (13) legal issues of software, (14) quality assurance, and (15) project and product management to the above (1-11 incl.). Highlights of the book series......This ``epos'' emphasises (1) software development from both a formal and an informal approach; (2) the use of mathematics, logic and algebras, as well as discrete mathematics: Sets, Cartesians, lists, functions, maps; (3) property as well as model-oriented specifications; (4) semiotics in the form...... are: (A) Emphasis on design: Literally a thousand development examples are given; and on ``Calculi'' of (B) domain and (C) requirements engineering: Domain facet ``operators'' like: (d.1) Instrinsics, (d.2) support technology, (d.3) management & organisation, (d.4) rules & regulations, (d.5) human...

  1. A Lyman Break Galaxy in the Epoch of Reionization from Hubble Space Telescope (HST) Grism Spectroscopy

    Science.gov (United States)

    Rhoads, James E.; Malhotra, Sangeeta; Stern, Daniel K.; Gardner, Jonathan P.; Dickinson, Mark; Pirzkal, Norbert; Spinrad, Hyron; Reddy, Naveen; Dey, Arjun; Hathi, Nimish; hide

    2013-01-01

    Slitless grism spectroscopy from space offers dramatic advantages for studying high redshift galaxies: high spatial resolution to match the compact sizes of the targets, a dark and uniform sky background, and simultaneous observation over fields ranging from five square arcminutes (HST) to over 1000 square arcminutes (Euclid). Here we present observations of a galaxy at z = 6.57 the end of the reioinization epoch identified using slitless HST grism spectra from the PEARS survey (Probing Evolution And Reionization Spectroscopically) and reconfirmed with Keck + DEIMOS. This high redshift identification is enabled by the depth of the PEARS survey. Substantially higher redshifts are precluded for PEARS data by the declining sensitivity of the ACS grism at greater than lambda 0.95 micrometers. Spectra of Lyman breaks at yet higher redshifts will be possible using comparably deep observations with IR-sensitive grisms.

  2. Turbulent Cloud Structure and Power Spectrum from 23 years of HST Observations

    Science.gov (United States)

    Cosentino, Richard; Simon, Amy; Morales-Juberias, Raul

    2018-01-01

    Images of Jupiter’s clouds show that turbulence is a ubiquitous phenomenon over many orders of scale size. According to Kolmogorov’s theory for turbulence, the frequency/distribution of clouds at various scales can be used to produce an energy power spectrum of a passive tracer. Kolmogorov theory predicts the spectral slopes for “shallow” and “deep” fluids in motion by following how energy is injected and dissipated in the fluid. We are quantifying the turbulent nature of Jupiter’s clouds over 23 years of Hubble Space Telescope (HST) observations using an algorithm first presented in Choi and Showman (2011, Icarus 216). We applied the power spectrum fitting algorithm to a variety of filters from available HST data and tested its sensitivity to free parameters and compare our results to Choi and Showman (2011). We will comment on the evidence for a 2D turbulent regime In Jupiter’s clouds and will report on empirical values found in the spectra and their physical interpretations, such as the Rhines scale. We also will report on the behavior of the passive tracer power spectrum and trends that exist over time for different latitudinal regions, primarily the belts and zones and the north and south equatorial belts.

  3. APIS : an interactive database of HST-UV observations of the outer planets

    Science.gov (United States)

    Lamy, Laurent; Henry, Florence; Prangé, Renée; Le Sidaner, Pierre

    2014-05-01

    Remote UV measurement of the outer planets offer a wealth of informations on rings, moons, planetary atmospheres and magnetospheres. Auroral emissions in particular provide highly valuable constraints on the auroral processes at work and the underlying coupling between the solar wind, the magnetosphere, the ionosphere and the moons. Key observables provided by high resolution spectro-imaging include the spatial topology and the dynamics of active magnetic field lines, the radiated and the precipitated powers or the energy of precipitating particles. The Hubble Space Telescope (HST) acquired thousands of Far-UV spectra and images of the aurorae of Jupiter, Saturn and Uranus since 1993, feeding in numerous magnetospheric studies. But their use remains generally limited, owing to the difficulty to access and use raw and value-added data. APIS, the egyptian god of fertilization, is also the acronym of a new database (Auroral Planetary Imaging and Spectroscopy), aimed at facilitating the use of HST planetary auroral observations. APIS is based at the Virtual Observatory (VO) of Paris and provides a free and interactive access to a variety of high level data through a simple research interface and standard VO tools (as Aladin, Specview). We will present the capabilities of APIS and illustrate them with several examples.

  4. VizieR Online Data Catalog: HST photometry of M31 globular clusters (Federici+, 2012)

    Science.gov (United States)

    Federici, L.; Cacciari, C.; Bellazzini, M.; Fusi Pecci, F.; Galleti, S.; Perina, S.

    2013-01-01

    Tables g58.dat, g108.dat, g105.dat, g219.dat, b468.dat, g1.dat, g64.dat, g87.dat, g119.dat, g287.dat, g302.dat, g11.dat, g33.dat, g76.dat, g312.dat, g319.dat, g322.dat present the photometry of the individual stars of 17 M31 globular clusters observed with the WFPC2 on board of the HST, employing the F555W/F814W filters (Fusi Pecci et al. 1996AJ....112.1461F (FFP96), Rich et al. 2005AJ....129.2670R (R05)). The data reduction has been performed using ROMAFOT (Buonanno et al. 1983A&A...126..278B), a multicomponent fitting package purposely adapted to handle HST data, that provides as output the magnitudes and the pixel positions of the detected sources. The CTE-corrected photometric data were converted to the Johnson-Cousins V,I magnitudes according to Holtzman et al (1995PASP..107..156H). Table g351.dat presents the photometry of the individual stars of the M31 globular cluster B405-G351 observed with the HST/COSTAR-corrected FOC + the F430W/F480LP filters. The data reduction has been performed using ROMAFOT; the photometric data were converted to the Johnson-Cousins system B,V magnitudes (see FFP96). Tables gc1.dat, gc2.dat, gc3.dat, gc5.dat, gc6.dat, gc7.dat, gc8.dat, gc9.dat, gc10.dat, gc4.dat, ec1.dat, ec2.dat, ec3.dat, ec4.dat present the photometry of the individual stars of 14 M31 globular clusters observed with the WFC/ACS on board of the HST + F435W/F606W filters (see Galleti et al., 2006ApJ...650L.107G; Mackey et al., 2007ApJ...655L..85M; Mackey et al., 2006ApJ...653L.105M). The data reduction has been performed using the ACS module of DOLPHOT, a point spread function-fitting package specifically devoted to the photometry of HST data, that provides as output the magnitudes and the pixel positions of the detected sources, and a number of quality parameters for a suitable sample selection. The tables present, for the ACS chip holding the cluster, all the stars with valid measurements in both passbands, global quality flag=1, crowding parameter 23.5,and noise

  5. Interplay between usability evaluation and software development (I-USED 2009)

    DEFF Research Database (Denmark)

    Abrahão, S.; Hornbæk, Kasper Anders Søren; Law, E.

    2009-01-01

    This workshop is aimed at bringing together researchers and practitioners from the Human-Computer Interaction (HCI) and Software Engineering (SE) fields to determine the state-of-the-art in the interplay between usability evaluation and software development and to generate ideas for new...... and improved relations between these activities. The aim is to base the determination of the current state on empirical studies. Presentations of new ideas on how to improve the interplay between HCI & SE to the design of usable software systems should also be based on empirical studies....

  6. Thickness calculation software of the thermal insulation in facilities using thermal solar energy; Software para el calculo de espesores del aislante termico en instalaciones de aprovechamiento de energia solar termica

    Energy Technology Data Exchange (ETDEWEB)

    Portillo Jimenez, Canek [Universidad Autonoma de Sinaloa, Culiacan, Sinaloa (Mexico)]. E-mail: cnk@uas.uasnet.mx

    2010-11-15

    It is presented a software application for calculating the thickness of the thermal insulation used in various facilities where there are thermal systems using solar energy. The software facilitates the calculation of the thermal cover thickness over components such as pipes (flat or round), storage and other devices that require thermal protection, installed in outdoors or indoors. The software was programmed in Visual Basic by following the technical specifications of the current regulations in the field. Application examples are performed, obtaining certain results that are discussed briefly. [Spanish] Se presenta un software de aplicacion para el calculo de los espesores de los aislantes termicos, utilizados en diferentes instalaciones donde existen sistemas de aprovechamiento termico de energia solar. El software facilita el calculo del grosor del recubrimiento termico en componentes tales como: tuberias (planas o circulares), depositos acumuladores y otros aparatos que necesiten proteccion termica, instalados en exteriores o en interiores. El software fue programado en Visual Basic siguiendo las especificaciones tecnicas de la normatividad vigente en la materia. Se realizan ejemplos de aplicacion, donde se obtienen ciertos resultados de los cuales se hace una breve discusion.

  7. The HDUV Survey: Six Lyman Continuum Emitter Candidates at z ˜ 2 Revealed by HST UV Imaging

    Science.gov (United States)

    Naidu, R. P.; Oesch, P. A.; Reddy, N.; Holden, B.; Steidel, C. C.; Montes, M.; Atek, H.; Bouwens, R. J.; Carollo, C. M.; Cibinel, A.; Illingworth, G. D.; Labbé, I.; Magee, D.; Morselli, L.; Nelson, E. J.; van Dokkum, P. G.; Wilkins, S.

    2017-09-01

    We present six galaxies at z˜ 2 that show evidence of Lyman continuum (LyC) emission based on the newly acquired UV imaging of the Hubble Deep UV legacy survey (HDUV) conducted with the WFC3/UVIS camera on the Hubble Space Telescope (HST). At the redshift of these sources, the HDUV F275W images partially probe the ionizing continuum. By exploiting the HST multiwavelength data available in the HDUV/GOODS fields, models of the UV spectral energy distributions, and detailed Monte Carlo simulations of the intergalactic medium absorption, we estimate the absolute ionizing photon escape fractions of these galaxies to be very high—typically > 60 % (> 13 % for all sources at 90% likelihood). Our findings are in broad agreement with previous studies that found only a small fraction of galaxies with high escape fraction. These six galaxies compose the largest sample yet of LyC leaking candidates at z˜ 2 whose inferred LyC flux has been observed at HST resolution. While three of our six candidates show evidence of hosting an active galactic nucleus, two of these are heavily obscured and their LyC emission appears to originate from star-forming regions rather than the central nucleus. Extensive multiwavelength data in the GOODS fields, especially the near-IR grism spectra from the 3D-HST survey, enable us to study the candidates in detail and tentatively test some recently proposed indirect methods to probe LyC leakage. High-resolution spectroscopic follow-up of our candidates will help constrain such indirect methods, which are our only hope of studying f esc at z˜ 5-9 in the JWST era. Based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the data archive at the Space Telescope Science Institute. STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.

  8. 3D-HST Grism Spectroscopy of a Gravitationally Lensed, Low-metallicity Starburst Galaxy at z = 1.847

    Science.gov (United States)

    Brammer, Gabriel B.; Sánchez-Janssen, Rubén; Labbé, Ivo; da Cunha, Elisabete; Erb, Dawn K.; Franx, Marijn; Fumagalli, Mattia; Lundgren, Britt; Marchesini, Danilo; Momcheva, Ivelina; Nelson, Erica; Patel, Shannon; Quadri, Ryan; Rix, Hans-Walter; Skelton, Rosalind E.; Schmidt, Kasper B.; van der Wel, Arjen; van Dokkum, Pieter G.; Wake, David A.; Whitaker, Katherine E.

    2012-10-01

    We present Hubble Space Telescope (HST) imaging and spectroscopy of the gravitational lens SL2SJ02176-0513, a cusp arc at z = 1.847. The UV continuum of the lensed galaxy is very blue, which is seemingly at odds with its redder optical colors. The 3D-HST WFC3/G141 near-infrared spectrum of the lens reveals the source of this discrepancy to be extremely strong [O III] λ5007 and Hβ emission lines with rest-frame equivalent widths of 2000 ± 100 and 520 ± 40 Å, respectively. The source has a stellar mass ~108 M ⊙, sSFR ~ 100 Gyr-1, and detection of [O III] λ4363 yields a metallicity of 12 + log (O/H) = 7.5 ± 0.2. We identify local blue compact dwarf analogs to SL2SJ02176-0513, which are among the most metal-poor galaxies in the Sloan Digital Sky Survey. The local analogs resemble the lensed galaxy in many ways, including UV/optical spectral energy distribution, spatial morphology, and emission line equivalent widths and ratios. Common to SL2SJ02176-0513 and its local counterparts is an upturn at mid-IR wavelengths likely arising from hot dust heated by starbursts. The emission lines of SL2SJ02176-0513 are spatially resolved owing to the combination of the lens and the high spatial resolution of HST. The lensed galaxy is composed of two clumps with combined size re ~300 pc, and we resolve significant differences in UV color and emission line equivalent width between them. Though it has characteristics occasionally attributed to active galactic nuclei, we conclude that SL2SJ02176-0513 is a low-metallicity star-bursting dwarf galaxy. Such galaxies will be found in significant numbers in the full 3D-HST grism survey. Based on observations made with the NASA/ESA Hubble Space Telescope, program 12328, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.

  9. Desarrollo de software educativo: una propuesta metodológica

    Directory of Open Access Journals (Sweden)

    Hugo Quintero

    2005-09-01

    Full Text Available En este trabajo se propone una metodología para el diseño de software en educación, la cual reúne tanto los elementos educativos como los de análisis t diseño de sistemas, integrando las etapas de realización de software con las teorías de aprendizaje. Esta se ha puesto en práctica en los software denominados “Aprendiendo Física con Experimentos” y “Conociendo algunos físicos”, los cuales están en proceso de validación de usuarios finales, quienes solicitan el material para ponerlo en práctica en su aula, a un 81,2% le pareció fácil la utilización del mismo, el 84% se sintió cómodo con la utilización del mismo.

  10. HST image of Gravitational Lens G2237 + 305 or 'Einstein Cross'

    Science.gov (United States)

    1990-01-01

    European Space Agency (ESA) Faint Object Camera (FOC) science image was taken from the Hubble Space Telescope (HST) of Gravitational Lens G2237 + 305 or 'Einstein Cross'. The gravitational lens G2237 + 305 or 'Einstein Cross' shows four images of a very distant quasar which has been multiple-imaged by a relatively nearby galaxy acting as a gravitational lens. The angular separation between the upper and lower images is 1.6 arc seconds. Photo was released from Goddard Space Flight Center (GSFC) 09-12-90.

  11. Construção de um software educativo sobre transtornos da personalidade

    Directory of Open Access Journals (Sweden)

    Nadja Cristiane Lappann Botti

    2011-12-01

    Full Text Available O estudo objetivou relatar a experiência da construção de um software educativo na área da saúde mental. O software foi desenvolvido visando capacitar o estudante de enfermagem a identificar os principais transtornos da personalidade. Nesse processo, aplicou-se o referencial pedagógico de Vygotsky e o referencial teórico dos critérios diagnósticos definidos pelo DSM-IV. A partir destes referenciais identificaram-se transtornos da personalidade em personagens de histórias e/ou filmes infantis. Para desenvolvimento do software construiu-se banco de multimídias com dados gráficos, sonoros e explicativos. O software desenvolvido foi um jogo educativo do tipo quiz composto por perguntas com níveis crescentes de dificuldade. O software foi desenvolvido no programa Microsoft PowerPoint Office 2007. Este programa com seus mecanismos de botões de ação e hiperlink possibilitam configurar ações. Acredita-se na validade desta estratégia para o ensino-aprendizagem de conteúdos relativos à área da Enfermagem em Saúde Mental.

  12. 3D-HST: A Wide-field Grism Spectroscopic Survey with the Hubble Space Telescope

    Science.gov (United States)

    Brammer, Gabriel B.; van Dokkum, Pieter G.; Franx, Marijn; Fumagalli, Mattia; Patel, Shannon; Rix, Hans-Walter; Skelton, Rosalind E.; Kriek, Mariska; Nelson, Erica; Schmidt, Kasper B.; Bezanson, Rachel; da Cunha, Elisabete; Erb, Dawn K.; Fan, Xiaohui; Förster Schreiber, Natascha; Illingworth, Garth D.; Labbé, Ivo; Leja, Joel; Lundgren, Britt; Magee, Dan; Marchesini, Danilo; McCarthy, Patrick; Momcheva, Ivelina; Muzzin, Adam; Quadri, Ryan; Steidel, Charles C.; Tal, Tomer; Wake, David; Whitaker, Katherine E.; Williams, Anna

    2012-06-01

    We present 3D-HST, a near-infrared spectroscopic Treasury program with the Hubble Space Telescope for studying the physical processes that shape galaxies in the distant universe. 3D-HST provides rest-frame optical spectra for a sample of ~7000 galaxies at 1 < z < 3.5, the epoch when ~60% of all star formation took place, the number density of quasars peaked, the first galaxies stopped forming stars, and the structural regularity that we see in galaxies today must have emerged. 3D-HST will cover three quarters (625 arcmin2) of the CANDELS Treasury survey area with two orbits of primary WFC3/G141 grism coverage and two to four orbits with the ACS/G800L grism in parallel. In the IR, these exposure times yield a continuum signal-to-noise ratio of ~5 per resolution element at H 140 ~ 23.1 and a 5σ emission-line sensitivity of ~5 × 10-17 erg s-1 cm-2 for typical objects, improving by a factor of ~2 for compact sources in images with low sky background levels. The WFC3/G141 spectra provide continuous wavelength coverage from 1.1 to 1.6 μm at a spatial resolution of ~0farcs13, which, combined with their depth, makes them a unique resource for studying galaxy evolution. We present an overview of the preliminary reduction and analysis of the grism observations, including emission-line and redshift measurements from combined fits to the extracted grism spectra and photometry from ancillary multi-wavelength catalogs. The present analysis yields redshift estimates with a precision of σ(z) = 0.0034(1 + z), or σ(v) ≈ 1000 km s-1. We illustrate how the generalized nature of the survey yields near-infrared spectra of remarkable quality for many different types of objects, including a quasar at z = 4.7, quiescent galaxies at z ~ 2, and the most distant T-type brown dwarf star known. The combination of the CANDELS and 3D-HST surveys will provide the definitive imaging and spectroscopic data set for studies of the 1 < z < 3.5 universe until the launch of the James Webb Space

  13. Modelo formal de pruebas funcionales de software para alcanzar el Nivel de Madurez Integrado 2

    Directory of Open Access Journals (Sweden)

    Milton Eduardo Escobar-Sánchez

    2015-05-01

    Full Text Available Las aplicaciones de software son cada vez más importantes para las organizaciones debido a que permiten llevar a cabo efiientemente sus tareas primordiales; por ello es mandatorio realizar las pruebas de calidad de software. Esta investigación se enfocó en diseñar un modelo formal para desarrollar pruebas funcionales de software que permitan alcanzar el nivel de calidad 2 del Modelo de Madurez de Pruebas Integrado (TMMI. El proceso se inició con un diagnóstico situacional, aplicando la norma ISO-9001-2000; luego, se evaluaron diversos modelos de prueba de calidad de software, como el ISO/IEC 9126, el TMM, el TMMI, el Proceso de Mejoramiento de Pruebas (TPI y el Enfoque de Gestión de Pruebas (TMAP, realizando una comparación bajo algunos criterios como año de publicación, licenciamiento, niveles, factorías y riesgos. Con esta información se diseñó el modelo propuesto, que es independiente del proceso de desarrollo de software. Concretamente, se fundamentó en el ciclo de prueba, y se compone de cuatro fases: Especifiación, Planifiación, Ejecución y Evaluación, en el que se contrasta en forma real el comportamiento esperado del software. Como caso de estudio y validación se aplicó este modelo a una PYME; los resultados mostraron la efiiencia del modelo y revelaron que es preciso desarrollar una cultura de calidad organizacional en esta empresa.

  14. Calidad en el desarrollo de Sistemas de Software

    OpenAIRE

    Pesado, Patricia Mabel; Bertone, Rodolfo Alfredo; Esponda, Silvia; Pasini, Ariel C.; Martorelli, Sabrina Lorena

    2010-01-01

    El objetivo del subproyecto “Calidad en el desarrollo de Sistemas de Software" es analizar, investigar y desarrollar propuestas en temas relacionados con el aseguramiento de la calidad en cada una de las etapas del desarrollo de Sistemas de Software. En particular se ha trabajado y estudiado las normas de calidad más ampliamente difundidas, líneas ISO y CMMI, y su incidencia en entornos como la pequeña y mediana industria de nuestro país. Desde el año 2006, se ha trabajado en la adecuación...

  15. Hackers: de piratas a defensores del software libre

    OpenAIRE

    Jorge Lizama Mendoza

    2002-01-01

    El presente artículo consta de dos partes: en la primera se ofrecen argumentos que permiten definir a los hackers como un grupo de expertos en informática que, mediante la práctica de unos principios éticos tales como el acceso a las computadoras debe ser libre, Crea software y compártelo con la comunidad internet; han inaugurado una nueva dinámica de trabajo entre los usuarios de la red para desarrollar software libre. En la segunda parte se analiza la historia de Linux, un si...

  16. FIRST RESULTS FROM THE 3D-HST SURVEY: THE STRIKING DIVERSITY OF MASSIVE GALAXIES AT z > 1

    International Nuclear Information System (INIS)

    Van Dokkum, Pieter G.; Nelson, Erica; Skelton, Rosalind E.; Bezanson, Rachel; Lundgren, Britt; Brammer, Gabriel; Fumagalli, Mattia; Franx, Marijn; Patel, Shannon; Labbé, Ivo; Rix, Hans-Walter; Schmidt, Kasper B.; Da Cunha, Elisabete; Kriek, Mariska; Bian Fuyan; Fan Xiaohui; Erb, Dawn K.; Förster Schreiber, Natascha; Illingworth, Garth D.; Magee, Dan

    2011-01-01

    We present first results from the 3D-HST program, a near-IR spectroscopic survey performed with the Wide Field Camera 3 (WFC3) on the HST. We have used 3D-HST spectra to measure redshifts and Hα equivalent widths (EW Hα ) for a complete, stellar mass-limited sample of 34 galaxies at 1 star > 10 11 M ☉ in the COSMOS, GOODS, and AEGIS fields. We find that a substantial fraction of massive galaxies at this epoch are forming stars at a high rate: the fraction of galaxies with EW Hα >10 Å is 59%, compared to 10% among Sloan Digital Sky Survey galaxies of similar masses at z = 0.1. Galaxies with weak Hα emission show absorption lines typical of 2-4 Gyr old stellar populations. The structural parameters of the galaxies, derived from the associated WFC3 F140W imaging data, correlate with the presence of Hα; quiescent galaxies are compact with high Sérsic index and high inferred velocity dispersion, whereas star-forming galaxies are typically large two-armed spiral galaxies, with low Sérsic index. Some of these star-forming galaxies might be progenitors of the most massive S0 and Sa galaxies. Our results challenge the idea that galaxies at fixed mass form a homogeneous population with small scatter in their properties. Instead, we find that massive galaxies form a highly diverse population at z > 1, in marked contrast to the local universe.

  17. Success Factors for Using Case Method in Teaching and Learning Software Engineering

    Science.gov (United States)

    Razali, Rozilawati; Zainal, Dzulaiha Aryanee Putri

    2013-01-01

    The Case Method (CM) has long been used effectively in Social Science education. Its potential use in Applied Science such as Software Engineering (SE) however has yet to be further explored. SE is an engineering discipline that concerns the principles, methods and tools used throughout the software development lifecycle. In CM, subjects are…

  18. Modelo de calidad para el software orientado a objetos

    OpenAIRE

    Fuertes Castro, José Luis

    2002-01-01

    El software ha obtenido en la actualidad una gran importancia en todos los ámbitos de la vida cotidiana. Es indudable que la calidad del software juega un papel fundamental en todo desarrollo informático, aunque en ocasiones no se le presta la suficiente atención, quizás debido a los relativamente escasos trabajos relacionados con este tema desarrollados hasta la fecha. En el presente trabajo, se plantea la necesidad de un modelo de calidad completo. Para cubrir esta necesid...

  19. The HST Large Programme on ω Centauri. II. Internal Kinematics

    Science.gov (United States)

    Bellini, Andrea; Libralato, Mattia; Bedin, Luigi R.; Milone, Antonino P.; van der Marel, Roeland P.; Anderson, Jay; Apai, Dániel; Burgasser, Adam J.; Marino, Anna F.; Rees, Jon M.

    2018-01-01

    In this second installment of the series, we look at the internal kinematics of the multiple stellar populations of the globular cluster ω Centauri in one of the parallel Hubble Space Telescope (HST) fields, located at about 3.5 half-light radii from the center of the cluster. Thanks to the over 15 yr long baseline and the exquisite astrometric precision of the HST cameras, well-measured stars in our proper-motion catalog have errors as low as ∼10 μas yr‑1, and the catalog itself extends to near the hydrogen-burning limit of the cluster. We show that second-generation (2G) stars are significantly more radially anisotropic than first-generation (1G) stars. The latter are instead consistent with an isotropic velocity distribution. In addition, 1G stars have excess systemic rotation in the plane of the sky with respect to 2G stars. We show that the six populations below the main-sequence (MS) knee identified in our first paper are associated with the five main population groups recently isolated on the upper MS in the core of cluster. Furthermore, we find both 1G and 2G stars in the field to be far from being in energy equipartition, with {η }1{{G}}=-0.007+/- 0.026 for the former and {η }2{{G}}=0.074+/- 0.029 for the latter, where η is defined so that the velocity dispersion {σ }μ scales with stellar mass as {σ }μ \\propto {m}-η . The kinematical differences reported here can help constrain the formation mechanisms for the multiple stellar populations in ω Centauri and other globular clusters. We make our astro-photometric catalog publicly available.

  20. Confirmation and characterization of young planetary companions hidden in the HST NICMOS archive

    Science.gov (United States)

    Pueyo, Laurent

    2013-10-01

    We propose to conduct WFC3 high contrast observations of six faint planetary candidates orbiting young {1 to 100 Myrs} stars identified in archival HST NICMOS coronagraphic data as part of our team's program AR-12652. Such rare objects are of the utmost importance to comparative exo-planetology as their physical properties reflect the initial conditions of still poorly constrained planetary formation mechanisms. Moreover directly imaged systems are precious artifacts in the expanding exo-planetary treasure trove as they are readily available for spectroscopic characterization. Our statistical analysis, which combines population synthesis models and empirical inspections of the entire NICMOS field of view for all sources observed in coronaraphic mode, almost guarantees that one of these six faint candidates is associated with its putative host star. We will conduct our observation in four near infrared filter, F125W, F160W to establish the baseline luminosity of our candidates and in F127M and F139M in order to probe the depth their water absorption features, characteristic of substellar /exo-planetary like atmospheres. Because of the youth of our targets, this program, which only requires a modest 12 HST orbits, will almost certainly identify and image a young or adolescent exo-planet.

  1. The 3D-HST Survey: Hubble Space Telescope WFC3/G141 Grism Spectra, Redshifts, and Emission Line Measurements for ~ 100,000 Galaxies

    Science.gov (United States)

    Momcheva, Ivelina G.; Brammer, Gabriel B.; van Dokkum, Pieter G.; Skelton, Rosalind E.; Whitaker, Katherine E.; Nelson, Erica J.; Fumagalli, Mattia; Maseda, Michael V.; Leja, Joel; Franx, Marijn; Rix, Hans-Walter; Bezanson, Rachel; Da Cunha, Elisabete; Dickey, Claire; Förster Schreiber, Natascha M.; Illingworth, Garth; Kriek, Mariska; Labbé, Ivo; Ulf Lange, Johannes; Lundgren, Britt F.; Magee, Daniel; Marchesini, Danilo; Oesch, Pascal; Pacifici, Camilla; Patel, Shannon G.; Price, Sedona; Tal, Tomer; Wake, David A.; van der Wel, Arjen; Wuyts, Stijn

    2016-08-01

    We present reduced data and data products from the 3D-HST survey, a 248-orbit HST Treasury program. The survey obtained WFC3 G141 grism spectroscopy in four of the five CANDELS fields: AEGIS, COSMOS, GOODS-S, and UDS, along with WFC3 H 140 imaging, parallel ACS G800L spectroscopy, and parallel I 814 imaging. In a previous paper, we presented photometric catalogs in these four fields and in GOODS-N, the fifth CANDELS field. Here we describe and present the WFC3 G141 spectroscopic data, again augmented with data from GO-1600 in GOODS-N (PI: B. Weiner). We developed software to automatically and optimally extract interlaced two-dimensional (2D) and one-dimensional (1D) spectra for all objects in the Skelton et al. (2014) photometric catalogs. The 2D spectra and the multi-band photometry were fit simultaneously to determine redshifts and emission line strengths, taking the morphology of the galaxies explicitly into account. The resulting catalog has redshifts and line strengths (where available) for 22,548 unique objects down to {{JH}}{IR}≤slant 24 (79,609 unique objects down to {{JH}}{IR}≤slant 26). Of these, 5459 galaxies are at z\\gt 1.5 and 9621 are at 0.7\\lt z\\lt 1.5, where Hα falls in the G141 wavelength coverage. The typical redshift error for {{JH}}{IR}≤slant 24 galaxies is {σ }z≈ 0.003× (1+z), I.e., one native WFC3 pixel. The 3σ limit for emission line fluxes of point sources is 2.1× {10}-17 erg s-1 cm-2. All 2D and 1D spectra, as well as redshifts, line fluxes, and other derived parameters, are publicly available.18

  2. Towards a Theory of Affect and Software Developers' Performance

    OpenAIRE

    Graziotin, Daniel

    2016-01-01

    For more than thirty years, it has been claimed that a way to improve software developers' productivity and software quality is to focus on people. The underlying assumption seems to be that "happy and satisfied software developers perform better". More specifically, affects-emotions and moods-have an impact on cognitive activities and the working performance of individuals. Development tasks are undertaken heavily through cognitive processes, yet software engineering research (SE) lacks theo...

  3. The HST/ACS Coma Cluster Survey : VI. Colour gradients in giant and dwarf early-type galaxies

    NARCIS (Netherlands)

    den Brok, M.; Peletier, R. F.; Valentijn, E. A.; Balcells, Marc; Carter, D.; Erwin, P.; Ferguson, H. C.; Goudfrooij, P.; Graham, A. W.; Hammer, D.; Lucey, J. R.; Trentham, N.; Guzman, R.; Hoyos, C.; Kleijn, G. Verdoes; Jogee, S.; Karick, A. M.; Marinova, I.; Mouhcine, M.; Weinzirl, T.

    Using deep, high-spatial-resolution imaging from the Hubble Space Telescope/Advanced Camera for Surveys (HST/ACS) Coma Cluster Treasury Survey, we determine colour profiles of early-type galaxies in the Coma cluster. From 176 galaxies brighter than M-F814W(AB) = -15 mag that are either

  4. Integrando mediante patrones de software una estrategia Fuzzy-Logic, en un servicio de balanceo dinámico de carga bajo CORBA

    OpenAIRE

    Gricelda Medina Veloz; Francisco Javier Luna Rosas; Jaime Muñoz Arteaga; Julio César Martínez Romo

    2008-01-01

    El enfoque del uso de patrones en el desarrollo de software se ha popularizado a nivel mundial y dentro de la ingeniería de software se ha extendido cada vez más su uso, a tal grado que se han creado y se siguen creando catálogos de patrones para solucionar problemas en el desarrollo de software a distintos niveles de abstracción. Este trabajo se centra en destacar el diseño mediante patrones de software de un servicio de balanceo de carga para aplicaciones distribuidas desarrolladas bajo el ...

  5. VizieR Online Data Catalog: HST/ACS Coma Cluster Survey. VI. (den Brok+, 2011)

    Science.gov (United States)

    den Brok, M.; Peletier, R. F.; Valentijn, E. A.; Balcells, M.; Carter, D.; Erwin, P.; Ferguson, H. C.; Goudfrooij, P.; Graham, A. W.; Hammer, D.; Lucey, J. R.; Trentham, N.; Guzman, R.; Hoyos, C.; Verdoes Kleijn, G.; Jogee, S.; Karick, A. M.; Marinova, I.; Mouhcine, M.; Weinzirl, T.

    2018-01-01

    We have used the data from the HST/ACS Coma Cluster Survey, a deep two-passband imaging survey of the Coma cluster. A full description of the observations and data reduction can be found in Paper I (Carter et al., 2008ApJS..176..424C). We have derived colour gradients for a sample of confirmed or very likely Coma cluster members. (2 data files).

  6. AEOLUS: A MARKOV CHAIN MONTE CARLO CODE FOR MAPPING ULTRACOOL ATMOSPHERES. AN APPLICATION ON JUPITER AND BROWN DWARF HST LIGHT CURVES

    Energy Technology Data Exchange (ETDEWEB)

    Karalidi, Theodora; Apai, Dániel; Schneider, Glenn; Hanson, Jake R. [Steward Observatory, Department of Astronomy, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721 (United States); Pasachoff, Jay M., E-mail: tkaralidi@email.arizona.edu [Hopkins Observatory, Williams College, 33 Lab Campus Drive, Williamstown, MA 01267 (United States)

    2015-11-20

    Deducing the cloud cover and its temporal evolution from the observed planetary spectra and phase curves can give us major insight into the atmospheric dynamics. In this paper, we present Aeolus, a Markov chain Monte Carlo code that maps the structure of brown dwarf and other ultracool atmospheres. We validated Aeolus on a set of unique Jupiter Hubble Space Telescope (HST) light curves. Aeolus accurately retrieves the properties of the major features of the Jovian atmosphere, such as the Great Red Spot and a major 5 μm hot spot. Aeolus is the first mapping code validated on actual observations of a giant planet over a full rotational period. For this study, we applied Aeolus to J- and H-band HST light curves of 2MASS J21392676+0220226 and 2MASS J0136565+093347. Aeolus retrieves three spots at the top of the atmosphere (per observational wavelength) of these two brown dwarfs, with a surface coverage of 21% ± 3% and 20.3% ± 1.5%, respectively. The Jupiter HST light curves will be publicly available via ADS/VIZIR.

  7. Metodología LEAN para el desarrollo de software. Ejemplo práctico de aplicación en empresa de desarrollo de software

    OpenAIRE

    Sanz Mateo, María Isabel

    2015-01-01

    Este proyecto pretende mostrar la aplicación de la metodología Lean. Al ser ésta una metodología no específica del desarrollo de software, se hace una exposición de los principales conceptos, principios y técnicas relacionados con la filosofía Lean y para los que se ha encontrado referencia en el ámbito de la Ingeniería del Software. Grado en Ingeniería Técnica en Informática de Gestión

  8. ENGLISH COMMUNICATIVE COMPETENCE WITH THE USE OF THE EDUCATIVE SOFTWARE / COMPETENCIA COMUNICATIVA EN INGLÉS CON EL USO DEL SOFTWARE EDUCATIVO

    Directory of Open Access Journals (Sweden)

    Oldy Medina Betancourt

    2013-12-01

    Full Text Available The authors supported the formation and development of the communicative competence in English with the use of the educative software for Senior High School students which constitutes a tool for all teachers and students because of the advantages that the modern technology offers to the lessons. Communicative competence has a paramount importance for human communication, which is its goal. The content of the article provides the theoretic, basically didactical sustains to the use of the software in the English lessons as a scientific newness. This technology, well used, could help the teaching learning process of this subject. In this article, some key categories are redefined and the treatment to the diagnosis and stimulation of some cognitive elements is also presented. These are of substantive importance for using new technology in the solution of the scientific problem dealt with. RESUMEN Se abordó la formación y desarrollo de la competencia comunicativa en inglés con el uso del software educativo para los estudiantes de preuniversitario, que se constituye en herramienta al alcance de los profesores y estudiantes por las ventajas que ofrece el uso de medios modernos en el aula. La competencia comunicativa, reviste importancia capital para la comunicación humana, que es definitivamente su fin. Su contenido recoge los sustentos teóricos, básicamente didácticos, para el uso del software en las clases de inglés como elemento de novedad científica. Esta tecnología, bien utilizada, sirve de soporte al proceso de enseñanza-aprendizaje de esta lengua. En el artículo se redefinen categorías clave para el proceso que se modela, así como se le da tratamiento al diagnóstico y estimulación de elementos de naturaleza cognitiva, que son de importancia sustantiva para la utilización del novedoso medio en función de dar solución al problema científico que se abordó.

  9. 3D-HST: A WIDE-FIELD GRISM SPECTROSCOPIC SURVEY WITH THE HUBBLE SPACE TELESCOPE

    International Nuclear Information System (INIS)

    Brammer, Gabriel B.; Van Dokkum, Pieter G.; Skelton, Rosalind E.; Nelson, Erica; Bezanson, Rachel; Leja, Joel; Lundgren, Britt; Franx, Marijn; Fumagalli, Mattia; Patel, Shannon; Labbé, Ivo; Rix, Hans-Walter; Schmidt, Kasper B.; Da Cunha, Elisabete; Kriek, Mariska; Erb, Dawn K.; Fan, Xiaohui; Förster Schreiber, Natascha; Illingworth, Garth D.; Magee, Dan

    2012-01-01

    We present 3D-HST, a near-infrared spectroscopic Treasury program with the Hubble Space Telescope for studying the physical processes that shape galaxies in the distant universe. 3D-HST provides rest-frame optical spectra for a sample of ∼7000 galaxies at 1 2 ) of the CANDELS Treasury survey area with two orbits of primary WFC3/G141 grism coverage and two to four orbits with the ACS/G800L grism in parallel. In the IR, these exposure times yield a continuum signal-to-noise ratio of ∼5 per resolution element at H 140 ∼ 23.1 and a 5σ emission-line sensitivity of ∼5 × 10 –17 erg s –1 cm –2 for typical objects, improving by a factor of ∼2 for compact sources in images with low sky background levels. The WFC3/G141 spectra provide continuous wavelength coverage from 1.1 to 1.6 μm at a spatial resolution of ∼0.''13, which, combined with their depth, makes them a unique resource for studying galaxy evolution. We present an overview of the preliminary reduction and analysis of the grism observations, including emission-line and redshift measurements from combined fits to the extracted grism spectra and photometry from ancillary multi-wavelength catalogs. The present analysis yields redshift estimates with a precision of σ(z) = 0.0034(1 + z), or σ(v) ≈ 1000 km s –1 . We illustrate how the generalized nature of the survey yields near-infrared spectra of remarkable quality for many different types of objects, including a quasar at z = 4.7, quiescent galaxies at z ∼ 2, and the most distant T-type brown dwarf star known. The combination of the CANDELS and 3D-HST surveys will provide the definitive imaging and spectroscopic data set for studies of the 1 < z < 3.5 universe until the launch of the James Webb Space Telescope.

  10. Arquitectura software para robots móviles aplicando la metodología mdasr

    OpenAIRE

    Londoño Ospina, Nelson de J.

    2011-01-01

    Se aplica la Metodología de Desarrollo de Arquitecturas Software para Robots –MDASR, como herramienta de especificación, análisis y diseño de una Arquitectura de Control Reactiva. La metodología se apoya en métodos y lenguajes ampliamente adoptados como el P U (Proceso Unificado de Desarrollo de Software) y UML (Lenguaje Unificado de Modelado), apropiando conceptos y métodos empleados en Ingeniería Software

  11. STELLAR POPULATIONS OF LYMAN BREAK GALAXIES AT z ≅ 1-3 IN THE HST/WFC3 EARLY RELEASE SCIENCE OBSERVATIONS

    International Nuclear Information System (INIS)

    Hathi, N. P.; McCarthy, P. J.; Cohen, S. H.; Windhorst, R. A.; Rutkowski, M. J.; Ryan, R. E. Jr.; Koekemoer, A. M.; Bond, H. E.; Finkelstein, S. L.; Yan, H.; O'Connell, R. W.; Straughn, A. N.; Kimble, R. A.; Balick, B.; Calzetti, D.; Disney, M. J.; Dopita, M. A.; Frogel, Jay A.; Hall, D. N. B.; Holtzman, J. A.

    2013-01-01

    We analyze the spectral energy distributions (SEDs) of Lyman break galaxies (LBGs) at z ≅ 1-3 selected using the Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) UVIS channel filters. These HST/WFC3 observations cover about 50 arcmin 2 in the GOODS-South field as a part of the WFC3 Early Release Science program. These LBGs at z ≅ 1-3 are selected using dropout selection criteria similar to high-redshift LBGs. The deep multi-band photometry in this field is used to identify best-fit SED models, from which we infer the following results: (1) the photometric redshift estimate of these dropout-selected LBGs is accurate to within few percent; (2) the UV spectral slope β is redder than at high redshift (z > 3), where LBGs are less dusty; (3) on average, LBGs at z ≅ 1-3 are massive, dustier, and more highly star forming, compared to LBGs at higher redshifts with similar luminosities (0.1L* ∼ 3, a true Lyman break selection at z ≅ 2 is essential. The future HST UV surveys, both wider and deeper, covering a large luminosity range are important to better understand LBG properties and their evolution.

  12. IMF dependence of Saturn's auroras: modelling study of HST and Cassini data from 12–15 February 2008

    Directory of Open Access Journals (Sweden)

    E. S. Belenkaya

    2010-08-01

    Full Text Available To gain better understanding of auroral processes in Saturn's magnetosphere, we compare ultraviolet (UV auroral images obtained by the Hubble Space Telescope (HST with the position of the open-closed field line boundary in the ionosphere calculated using a magnetic field model that employs Cassini measurements of the interplanetary magnetic field (IMF as input. Following earlier related studies of pre-orbit insertion data from January 2004 when Cassini was located ~ 1300 Saturn radii away from the planet, here we investigate the interval 12–15 February 2008, when UV images of Saturn's southern dayside aurora were obtained by the HST while the Cassini spacecraft measured the IMF in the solar wind just upstream of the dayside bow shock. This configuration thus provides an opportunity, unique to date, to determine the IMF impinging on Saturn's magnetosphere during imaging observations, without the need to take account of extended and uncertain interplanetary propagation delays. The paraboloid model of Saturn's magnetosphere is then employed to calculate the magnetospheric magnetic field structure and ionospheric open-closed field line boundary for averaged IMF vectors that correspond, with appropriate response delays, to four HST images. We show that the IMF-dependent open field region calculated from the model agrees reasonably well with the area lying poleward of the UV emissions, thus supporting the view that the poleward boundary of Saturn's auroral oval in the dayside ionosphere lies adjacent to the open-closed field line boundary.

  13. New results form HST on fast, colimated outflows in dying stars - the primary mechanism for shaping planetary nebulae

    Science.gov (United States)

    Sahai, R.; Contreras, C.

    2003-01-01

    In this paper, we briefly describe the results from imaging surveys of young PNe and PPNe with HST, and then present new results from detailed kinematic studies of several prominent objects which support our hypothesis for shaping PNe.

  14. Mining the HST "Advanced Spectral Library (ASTRAL)": The Evolution of Winds from non-coronal to hybrid giant stars

    Science.gov (United States)

    Nielsen, Krister E.; Carpenter, Ken G.; Kober, Gladys V.; Rau, Gioia

    2018-01-01

    The HST/STIS treasury program ASTRAL enables investigations of the character and dynamics of the wind and chromosphere of cool stars, using high quality spectral data. This paper shows how the wind features change with spectral class by comparing the non-coronal objects (Alpha Ori, Gamma Cru) with the hybrid stars (Gamma Dra, Beta Gem). In particular we study the intrinsic strength variation of the numerous FeII profiles observed in the near-ultraviolet HST spectrum that are sensitive to the wind opacity, turbulence and flow velocity. The FeII relative emission strength and wavelengths shifts between the absorption and emission components reflects the acceleration of the wind from the base of the chromosphere. We present the analysis of the outflowing wind characteristics when transitioning from the cool non-coronal objects toward the warmer objects with chromospheric emission from significantly hotter environments.

  15. Manufactura Esbelta: una contribución para el desarrollo de software con calidad

    Directory of Open Access Journals (Sweden)

    José Cadenas

    2010-09-01

    Full Text Available Esta investigación es una contribución a la mejora de la calidad del software que tiene como premisa que losdesarrollos de software efectuados a la fecha no satisfacen las expectativas de tiempo de desarrollo, fiabilidad, mantenibilidad,portabilidad y calidad. Se trata de una investigación de campo, apoyada en una revisión documental de tipono experimental, descriptiva y transeccional con el fin de evaluar la versión 4 del SQLfi. Para ello, se empleó el modelosistémico de calidad del software (MOSCA con una población de 26 personas miembros del equipo de investigación,de los cuales se tomó una muestra intencional de 11, los cuales evaluaron el producto SQLfi versión 4. Se obtuvo unnivel sistémico de calidad nulo, y como conclusión se propone la adopción de un modelo de desarrollo para la construcciónde software de calidad basado en estándares establecidos de manufactura esbelta (Lean Manufacturing,complementado con los aportes derivados de la evaluación a través de MOSCA y la experiencia de los investigadores.La contribución corresponde a una mejora de la calidad sistémica de desarrollo software que permite obtener productosen forma ágil, a un costo razonable y con los recursos presupuestados. Se recomienda evaluar si hay aumento en elnivel de madurez en los procesos de desarrollo de un grupo en un entorno científico y académico.

  16. The Business Case for Automated Software Engineering

    Science.gov (United States)

    Menzies, Tim; Elrawas, Oussama; Hihn, Jairus M.; Feather, Martin S.; Madachy, Ray; Boehm, Barry

    2007-01-01

    Adoption of advanced automated SE (ASE) tools would be more favored if a business case could be made that these tools are more valuable than alternate methods. In theory, software prediction models can be used to make that case. In practice, this is complicated by the 'local tuning' problem. Normally. predictors for software effort and defects and threat use local data to tune their predictions. Such local tuning data is often unavailable. This paper shows that assessing the relative merits of different SE methods need not require precise local tunings. STAR 1 is a simulated annealer plus a Bayesian post-processor that explores the space of possible local tunings within software prediction models. STAR 1 ranks project decisions by their effects on effort and defects and threats. In experiments with NASA systems. STARI found one project where ASE were essential for minimizing effort/ defect/ threats; and another project were ASE tools were merely optional.

  17. SOFTWARE LIBRE: OPORTUNIDADES Y RETOS CON ESPECIAL REFERENCIA A VENEZUELA

    Directory of Open Access Journals (Sweden)

    Gladys Rodríguez

    2008-11-01

    Full Text Available En este trabajo se abordan algunas consideraciones en torno al software libre, sus oportunidades pero también sus desafíos, a la vez que se expone el marco legal de esta figura a partir de su implementación en Venezuela. Se ha empleado una metodología descriptivo-explicativa, partiendo de la revisión bibliográfica conjuntamente con la legislación nacional sobre el tema. Asimismo, se consultó a FUNDACITE ZULIA, a través de la Misión Ciencia, y se concluye que el software libre es una oportunidad para desarrollar programas que atiendan necesidades particulares, y hay quienes consideran que resulta una herramienta especialmente útil para democratizar el acceso a la información en países en desarrollo; sin embargo, planteamos la realidad de una brecha digital entre países en desarrollo y desarrollados

  18. Uso de software libre en las empresas colombianas

    Directory of Open Access Journals (Sweden)

    Carlos Nelson Henrìquez Miranda

    2009-01-01

    Full Text Available ResumenActualmente las empresas usan la tecnología de punta para apoyar sus procesos comerciales, sin embargo en elámbito local podemos darnos cuenta que existen muchas empresas que no tienen conocimiento de la existenciade herramientas informáticas (software que les ayuden en sus labores empresariales. Algunos empresarios pordesconocimiento adquieren aplicaciones de software (propietario que son muy costosas y las cuales usan en unporcentaje muy bajo de sus verdaderas funcionalidades. Entonces hacen una gran inversión que no es redimibleen el futuro porque necesitan demasiadas asesorías y consultorías de estas empresas que comercializan la herramienta.Además si las empresas van creciendo e incluyen nuevas estaciones de trabajo, se necesita comprarmás software, porque este tipo de producto se vende normalmente bajo el término de licencia propietaria. Entoncesencontramos dos situaciones, aquellas empresas que no invierten en software porque es muy costoso, y aquellasque lo hacen pero a la inversión hecha, que a veces es muy alta, no le sacan provecho real por desconocimiento, odebido a una mala asesoría. Ante esta situación hay que buscar nuevas alternativas para lograr que las empresaspequeñas y medianas logren tener en sus manos todas las bondades que trae el uso de la computación (rapidez,eficiencia, organización entre otras. Una opción para este problema es la adopción de programas que no tienencosto o su costo es relativamente bajo, estos programas están enmarcados en el movimiento conocido como “SoftwareLibre”. Este nace como alternativa para uso de productos de una buena calidad a un bajo costo que permitala sistematización parcial o total de las empresas, además de usar programas ofimáticos para el manejo de lainformación de las oficinas.El uso de Software Libre en las empresas colombianas permitirá aumentar sus nivelesde competitividad, bajando un poco la inversión en software y mantenimiento, logrando una

  19. Progress in measurement of (n,x) cross sections at HST in 1995

    Energy Technology Data Exchange (ETDEWEB)

    Bangjiao, Ye; Zhongmin, Wang; Yangmei, Fan; Rongdian, Han; Xiaoqi, Yu; Huaijiang, Du [Department of Modern Physics, Univ. of Sci. and Tech. of China (China)

    1996-06-01

    The measurement of energy spectrum and angular distributions of protons emission from reaction induced by 14.6 MeV neutron bombarding stainless steel has been performed at Univ. of Sci. and Tech. of China, Hefei (HST) by using multitelescope system. 14.6 MeV neutrons were produced by 150 KeV Cockcroft-Walton accelerator. The 1Cr18Ni9Ti (type 321) stainless steel target with 0.8 mm thick and 40 mm height was used. The progress on measurement of {sup nat}Ni(n,x{alpha}) reaction cross sections are introduced. (2 figs.).

  20. Hackers: de piratas a defensores del software libre

    Directory of Open Access Journals (Sweden)

    Jorge Lizama Mendoza

    2002-01-01

    Full Text Available El presente artículo consta de dos partes: en la primera se ofrecen argumentos que permiten definir a los hackers como un grupo de expertos en informática que, mediante la práctica de unos principios éticos tales como “el acceso a las computadoras debe ser libre”, “Crea software y compártelo con la comunidad internet”; han inaugurado una nueva dinámica de trabajo entre los usuarios de la red para desarrollar software libre. En la segunda parte se analiza la historia de Linux, un sistema operativo gratuito que busca competir con las generaciones Windows de Microsoft, a fin de proporcionar un ejemplo de cómo se desarrolla la cultura hacker a través del trabajo colectivo, la innovación tecnológica y la economía regalo. El trabajo cierra con una referencia al proyecto del e-México, proponiendo que los hackers y el software libre (Linux podrían generar una nueva cultura de apropiación y usos tecnológicos para el país.

  1. A Queriable Repository for HST Telemetry Data, a Case Study in using Data Warehousing for Science and Engineering

    Science.gov (United States)

    Pollizzi, J. A.; Lezon, K.

    The Hubble Space Telescope (HST) generates on the order of 7,000 telemetry values, many of which are sampled at 1Hz, and with several hundred parameters being sampled at 40Hz. Such data volumes would quickly tax even the largest of processing facilities. Yet the ability to access the telemetry data in a variety of ways, and in particular, using ad hoc (i.e., no a priori fixed) queries, is essential to assuring the long term viability and usefulness of this instrument. As part of the recent NASA initiative to re-engineer HST's ground control systems, a concept arose to apply newly available data warehousing technologies to this problem. The Space Telescope Science Institute was engaged to develop a pilot to investigate the technology and to create a proof-of-concept testbed that could be demonstrated and evaluated for operational use. This paper describes this effort and its results.

  2. Collecting the Puzzle Pieces: Completing HST's UV+NIR Survey of the TRAPPIST-1 System ahead of JWST

    Science.gov (United States)

    de Wit, Julien

    2017-08-01

    Using the Spitzer Space Telescope, our team has discovered 7 Earth-sized planets around the nearby Ultra-cool dwarf star TRAPPIST-1. These planets are the first to be simultaneously Earth-sized, temperate, and amenable for in-depth atmospheric studies with space-based observatories (notably, JWST). TRAPPIST-1's system thus provides us with the first opportunity to probe the atmospheres of Earth-sized exoplanets and search for signs of habitability beyond our solar system, which will require spectral information from the UV to the IR to complete their atmospheric puzzles.We request 114 HST orbits to complete the UV+NIR survey of the 7 planets in preparation for their in-depth followup with JWST. The suggested low-density of the planets combined with their complex orbital resonance chain indicate that they migrated inward to their current positions and may harbor large water rich reservoir or leftover primordial H2 atmospheres. We have already ruled out the presence of clear H2 atmospheres for the 5 innermost planets using WFC3 and are requesting 16 WFC3 orbits to complete the TRAPPIST-1 NIR reconnaissance survey. Our primary request consists in 98 STIS orbits to complete the survey for extended H-exospheres around each of the planets. H-exospheres are the most accessible observables for volatile reservoirs, which have not been ruled out by our WFC3 observations. Exosphere detection is only amenable using HST unique capabilities in the UV and are pivotal to guide JWST's in-depth followup. The combined information from HST's UV and NIR observations will allow us put the first critical pieces of the atmospheric puzzle in place for these temperate earth-sized worlds.

  3. UN MODELO DE DIÁLOGO PARA LA EDUCCIÓN DE REQUISITOS DE SOFTWARE

    Directory of Open Access Journals (Sweden)

    CARLOS M. ZAPATA

    2010-01-01

    Full Text Available La educción de requisitos es importante en el desarrollo de software pues, dependiendo de la calidad de este proceso, se pueden desarrollar mejores aplicaciones de software. En la educción de requisitos, las entrevistas suelen ser el método más utilizado y se consideran diálogos entre analistas e interesados. Los trabajos realizados al respecto, presentan limitaciones como la carencia de una estructura definida para las entrevistas analistainteresado, obligando al analista a realizar de manera subjetiva el proceso de educción. En este artículo, se presenta una propuesta de estructura para un modelo de diálogo encaminado a la educción de requisitos de software. Además, se presenta la manera de realizar las preguntas durante una entrevista del proceso de educción, por medio de un caso de estudio.

  4. Software educativo para enfermería

    Directory of Open Access Journals (Sweden)

    Mac Gaul de Jorge, Marcia Ivonne

    2009-01-01

    Full Text Available El presente trabajo relata la experiencia de investigación del proyecto investigación del proyecto Nº 1531 del CIUNSa, "Software Educativo para Enfermería del Adulto". El equipo integra a enfermeras, quienes en el año 2003 elaboraron un material que responde a la realidad epidemiológica de nuestro país, marcadamente diferente a textos clásicos provenientes de otras regiones del mundo. Convencidos que las universidades deben dar respuestas a los problemas regionales, se están desarrollando materiales educativos que, aprovechan las ventajas que la Informática brinda (altamente interactivos y que pueden actualizarse permanentemente. Esta investigación está finalizando su etapa diagnóstica, la cual posee dos objetivos específicos para el desarrollo del producto software: uno tendiente a indagar las competencias de los alumnos de Ciencias de la Salud con relación al uso de materiales educativos informatizados; el otro, modelar el sistema informático del cual serán usuarios los alumnos y docentes, para lo cual se están realizando actividades de Ingeniería de Requerimientos que permitan establecer el contexto en el que se utilizará el software desarrollado. Creemos que el estudio diagnóstico culminado sitúa a nuestros alumnos en la misma sintonía de los desarrolladores. Sus expectativas por un recurso efectivamente didáctico coinciden con nuestras directrices de diseño.

  5. NaviSE: superenhancer navigator integrating epigenomics signal algebra.

    Science.gov (United States)

    Ascensión, Alex M; Arrospide-Elgarresta, Mikel; Izeta, Ander; Araúzo-Bravo, Marcos J

    2017-06-06

    Superenhancers are crucial structural genomic elements determining cell fate, and they are also involved in the determination of several diseases, such as cancer or neurodegeneration. Although there are pipelines which use independent pieces of software to predict the presence of superenhancers from genome-wide chromatin marks or DNA-interaction protein binding sites, there is not yet an integrated software tool that processes automatically algebra combinations of raw data sequencing into a comprehensive final annotated report of predicted superenhancers. We have developed NaviSE, a user-friendly streamlined tool which performs a fully-automated parallel processing of genome-wide epigenomics data from sequencing files into a final report, built with a comprehensive set of annotated files that are navigated through a graphic user interface dynamically generated by NaviSE. NaviSE also implements an 'epigenomics signal algebra' that allows the combination of multiple activation and repression epigenomics signals. NaviSE provides an interactive chromosomal landscaping of the locations of superenhancers, which can be navigated to obtain annotated information about superenhancer signal profile, associated genes, gene ontology enrichment analysis, motifs of transcription factor binding sites enriched in superenhancers, graphs of the metrics evaluating the superenhancers quality, protein-protein interaction networks and enriched metabolic pathways among other features. We have parallelised the most time-consuming tasks achieving a reduction up to 30% for a 15 CPUs machine. We have optimized the default parameters of NaviSE to facilitate its use. NaviSE allows different entry levels of data processing, from sra-fastq files to bed files; and unifies the processing of multiple replicates. NaviSE outperforms the more time-consuming processes required in a non-integrated pipeline. Alongside its high performance, NaviSE is able to provide biological insights, predicting cell

  6. Acercamiento ontológico a la gestión del conocimiento en el mantenimiento del software

    Directory of Open Access Journals (Sweden)

    Edgar Serna Montoya

    2010-01-01

    Full Text Available Muchos documentos describen diseños ontológicos, pero pocos explican cómo se puede diseñar una ontología; además, muy pocos se enfocan en la aplicación de técnicas de gestión del conocimiento para el mantenimiento del software. En este trabajo se hace un análisis de varias de las ontologías propuestas para responder a esta necesidad, con la finalidad de que algunas de sus ideas puedan ayudar a las organizaciones de desarrollo de software en trabajos similares, y se describe una metodología para estructurar una ontología que, además del área del mantenimiento del software, se pueda aplicar a otras áreas del conocimiento.

  7. Análisis de Desarrollo de Software Orientado a Feature - Línea de Producto de Software para Aplicaciones de TVDI

    Directory of Open Access Journals (Sweden)

    Mirtha Fabiana Miranda

    2015-08-01

    Full Text Available El Desarrollo de Software Orientado a Features (FOSD consiste en la construcción de sistemas a partir de un conjunto de características, cada feature o característica es una unidad funcional que satisface un requisito de software. Las fases son análisis del dominio, diseño e implementación del dominio, configuración y generación del producto de software, obteniendo así una Línea de Productos de Software (SPL. El presente trabajo realiza una comparación de herramientas para su implementación y, se analiza un conjunto de aplicaciones que modelan features. Resultando un espacio de estudio abierto para modelar aplicaciones para la Televisión Digital Interactiva (TVDi. Además se han encontrado diversos métodos, artefactos y patrones de diseño para el modelado de una aplicación de TVDi en particular, reflejando un estudio para el modelado de variabilidad. El objetivo principal es estudiar SPL / FOSD, empleando los Patrones de Diseño de Interacción (PDI para el dominio de las aplicaciones de TVDi.

  8. Análisis del software libre como herramienta de producción

    Directory of Open Access Journals (Sweden)

    Eduardo Miguel De la Hoz Correa

    2010-01-01

    Full Text Available En este artículo se muestran datos cuantitativos que permiten tener una idea más clara al momento de la evaluación en la adquisición de software y la implementación de código abierto y software libre. En él se examinan variables como el mercado objetivo, la fiabilidad, el rendimiento, la escalabilidad, seguridad y el costo de adquisición al momento de mirar al código abierto como alternativa viable con respecto al software propietario desde una perspectiva objetiva teniendo como base estudios a fondo a nivel mundial de aquellos factores que influyen en la toma de decisiones en todos los niveles de implementación del software de todo tipo.

  9. Acometer contra un ERP con Software Libre

    Directory of Open Access Journals (Sweden)

    Esteban Crespo

    2018-03-01

    Full Text Available La seguridad de la información es una preocupación creciente en empresas y organizaciones, siendo más alta aun cuando se vincula a plataformas financieras donde existe información sensible. Este artículo resume las técnicas utilizadas en el pentesting realizado al software ERP desarrollado en APEX 5 por la Universidad del Azuay; para ello se han contemplado seis etapas que sugiere una prueba de penetración: i la conceptualización, donde se define el alcance de las pruebas a realizar; ii la preparación del laboratorio, en la que se identifican algunas de las herramientas que servirán para el inicio de las pruebas de seguridad; iii la obtención de información, donde se hace el reconocimiento y escaneo de posibles objetivos que posteriormente serán explorados con mayor profundidad para identificar características intrínsecas que puedan ser aprovechadas; iv el análisis de las vulnerabilidades encontradas en la etapa anterior; v la explotación de vulnerabilidades; y vi la post explotación, etapa que contempla la destrucción de evidencias del ataque y la conservación de la conexión y los accesos logrados para extraer información. Todas estas etapas fueron efectuadas dentro de las instalaciones de la Universidad del Azuay, considerando el ambiente de desarrollo en el que actualmente se encuentra este software.

  10. The GST/HST: Creating an Integrated Sales Tax in a Federal Country

    Directory of Open Access Journals (Sweden)

    Richard M. Bird

    2012-03-01

    Full Text Available Canada is not a country with a reputation for bold experimentation. However, decades of federal-provincial compromises have successfully disproved the belief that an invoice-credit, destination-based value-added tax (VAT is unworkable at the subnational level. Canada’s experiences with the GST, as well as with subordinate VATs like the HST and independent vats like the QST, have three important and interlinked consequences for future tax reform in Canada. First, the exact shape of provincial-level taxes is largely irrelevant to the smooth functioning of a federal VAT — although lack of provincial-federal coordination inevitably raises administrative costs. Second, the nature of a subordinate sales tax is extremely important at the provincial level. As the furor over British Columbia’s HST demonstrates, governments can’t ignore voters’ views and must retain the freedom to tailor provincial-level taxes to meet them, even when public opinion leads to suboptimal outcomes. And third, the best way Ottawa can avoid such outcomes is to provide the provinces with critical support and encouragement in the form of administrative and economic assistance. Since the federal government controls Canada’s borders, over which imports and exports flow, and administers its own sales tax, there is plenty of scope for cooperation. This paper traces the history of federal sales taxation, from the first turnover tax in 1920 right up the present-day GST, along with comprehensive examinations of regional sales tax issues in every corner of Canada, making it one of the best available summary treatments of the GST.

  11. Un modelo para la solución de requerimientos no alineados: El caso del Software lúdico para la divulgación

    Directory of Open Access Journals (Sweden)

    Héctor G. Pérez-González

    2015-12-01

    Full Text Available Este artículo propone lineamientos metodológicos para ser aplicados en el proceso de requerimientos cuando estos se presentan como “No alineados”. Se considera que esta situación se da cuando los objetivos del propietario del software son distintos a los del usuario del mismo. Como caso de estudio se utiliza el desarrollo de software lúdico (también conocido como juegos digitales, videojuegos, o juegos serios con fines de divulgación. Esto involucra generalmente un conjunto de stakeholders más heterogéneo que el del software convencional. Adicionalmente, si el software se utiliza con objetivos de divulgación de ciencia, tecnología o innovación se agrega la complicación de la presencia de objetivos no alineados ya que el usuario final puede ignorar el objetivo real del software que utilizará. Consecuentemente el análisis de requerimientos cobra una importancia crucial. La literatura presenta propuestas para adaptar el proceso completo de software con objetivos educativos, sin poner atención al proceso de requerimientos ni a los objetivos de divulgación. Esta propuesta puede ser extrapolada a cualquier proceso de Ingeniería de requerimientos de Software donde se involucren requerimientos no alineados.

  12. Clinical software for MR imaging system, 4

    International Nuclear Information System (INIS)

    Shimizu, Koji; Kasai, Akira; Okamura, Shoichi

    1992-01-01

    Magnetic resonance imaging continues to elicit new application software through the recent technological advances of MR equipment. This paper describes several applications of our newly developed clinical software. The fast SE sequence (RISE) has proved to reduce routine examination time and to improve image quality, and ultra-fast FE sequence (SMASH) was found to extend the diagnostic capabilities in the field of cardiac study. Diffusion/perfusion imaging achieved in our MR system showed significant promise for providing novel information regarding tissue characterization. Furthermore, Image quality and practicalities of MR angiography have been improved by advanced imaging sequences and sophisticated post-processing software. (author)

  13. Tipología de Replicaciones para la Síntesis de Experimentos en Ingeniería del Software

    OpenAIRE

    Gómez Gómez, Omar Salvador

    2012-01-01

    La Ingenieria del Software Experimental (ISE) traslada a la Ingenieria del Software (IS) el paradigma experimental que se ha aplicado con exito en diversas disciplinas cientificas. El objetivo de la ISE es hacer de la construccion del software una actividad predecible gracias al conocimiento de las relaciones entre los procesos de produccion del software y los productos que se obtienen. Para avanzar en el paradigma experimental en IS no es suficiente aplicar las tecnicas de diseno experimenta...

  14. INGENIERÍA DE SOFTWARE ORIENTADA A AGENTES: ROLES Y METODOLOGÍAS

    Directory of Open Access Journals (Sweden)

    Joaquín Pina Amargós

    2006-12-01

    Full Text Available

     

    Hoy los estándares de ingeniería de software, RUP como proceso de desarrollo y UML como lenguaje de modelado, enfrentan retos debido a los paradigmas distribuidos: Servicios Web y agentes. Los agentes, paradigma prometedor para la ingeniería de software, tienen un gran reto, la falta de estándares metodológicos para su desarrollo. En este trabajo se realiza un estudio comparativo de nueve metodologías de agentes, se analizan roles de personas en la ingeniería de software orientada a agentes y se proponen algunos roles no presentes en RUP y recomendaciones para otros sí presentes que parecen necesarios con este nuevo paradigma.

  15. Prácticas dirigidas a la mejora de la usabilidad del software

    Directory of Open Access Journals (Sweden)

    Gabriel Alberto García Mireles

    2014-06-01

    Full Text Available La usabilidad es un atributo del software (y sistema que considera la experiencia de las personas cuando interaccionan con las interfaces de un producto software. Una meta potencial de las organizaciones de desarrollo de software es mejorar la usabilidad de sus productos. Por otra parte, el software se desarrolla aplicando un proceso, el cual tiene un impacto significativo en la calidad final del producto, incluyendo su usabilidad. Teniendo esto en cuenta, en este trabajo se presenta un enfoque basado en el proceso de software en el cual nos interesa conocer las actividades, prácticas y métodos que podrían mejorar la usabilidad del software. Para ello, a partir de una revisión sistemática de literatura, identificamos los procesos de software que podrían ser complementados con prácticas de usabilidad. Adicionalmente, los métodos y técnicas de soporte a la usabilidad los relacionamos con cada proceso. Este es un primer paso en el desarrollo de una estrategia que permita introducir cambios en el proceso de software de cara a mejorar la usabilidad del producto.

  16. Software para la enseñanza-aprendizaje de algoritmos estructurados

    Directory of Open Access Journals (Sweden)

    Arellano Pimentel, J. Jesús

    2012-12-01

    Full Text Available Actualmente existen diversas herramientas de software que sirven como recurso didáctico en la enseñanza-aprendizaje de algoritmos estructurados a nivel superior. Sin embargo, la gran mayoría solo hace énfasis en el diseño y prueba de los algoritmos. En el presente trabajo se propone un nuevo software, con base en la heurística de resolución de problemas de Polya, que da soporte a las fases de análisis y planteamiento del problema, además del diseño y traza completa de la prueba. Se realiza un análisis cualitativo entre el software propuesto y otras tres herramientas ampliamente utilizadas a nivel superior. La estructura y funcionalidad del software propuesto contribuye a que el estudiante adquiera, practique y ejercite la capacidad de resolver problemas de forma metódica a través de soluciones algorítmicas estructuradas.

  17. Las ontologías en la ingeniería de software: un acercamiento de dos grandes áreas del conocimiento Ontologies in software engineering: approaching two great knowledge areas

    Directory of Open Access Journals (Sweden)

    Carlos Mario Zapata Jaramillo

    2010-01-01

    Full Text Available Los conceptos ontológicos se suelen acercar más a la ingeniería del conocimiento, por lo que los ingenieros del software no los suelen aplicar para resolver problemas de su área. Es necesario que los ingenieros de software se apropien de las ontologías, pues éstas proporcionan un vocabulario común, que podría contribuir en la solución de problemas recurrentes en ingeniería del software, tales como la dificultad de la comunicación entre analista e interesado para definir los requisitos de un sistema, la baja reutilización de componentes y la escasa generación automática de código, entre otros. En este artículo se presenta un primer enlace entre las ontologías y la ingeniería de software mediante la recopilación y análisis de la literatura relativa a la utilización de las ontologías en las diferentes fases del ciclo de vida de un producto de software.Ontology concepts have been traditionally linked to knowledge engineering and software engineers have not applied them to solve problems of this area. It is necessary that software engineers use these ontologies, since they provide a common language, which can contribute to the solution of some common software engineering problems like difficulties in communication between the analyst and the interested person in order to define a system requirements, the low components re-use, and scarce automatic generation in code generation, among others. In this paper, a first encounter between ontologies and software engineering by means of a state-of-the-art analysis related to the use of ontologies in several phases of software development life cycle is presented.

  18. Masses of the Planetary Nebula Central Stars in the Galactic Globular Cluster System from HST Imaging and Spectroscopy

    Energy Technology Data Exchange (ETDEWEB)

    Jacoby, George H. [Lowell Observatory, Flagstaff, AZ 86001 (United States); Marco, Orsola De [Department of Physics and Astronomy, Macquarie University, Sydney, NSW 2109 (Australia); Davies, James [Space Telescope Science Institute, Baltimore MD 21218 (United States); Lotarevich, I. [American Museum of Natural History, New York, NY (United States); Bond, Howard E. [Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802 (United States); Harrington, J. Patrick [University of Maryland, College Park, MD (United States); Lanz, Thierry, E-mail: gjacoby@lowell.edu, E-mail: orsola.demarco@mq.edu.au, E-mail: jdavies@stsci.edu, E-mail: heb11@psu.edu, E-mail: jph@astro.umd.edu, E-mail: thierry.lanz@oca.eu [Laboratoire Lagrange, Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, F-06304 Nice (France)

    2017-02-10

    The globular cluster (GC) system of our Galaxy contains four planetary nebulae (PNe): K 648 (or Ps 1) in M15, IRAS 18333-2357 in M22, JaFu 1 in Pal 6, and JaFu 2 in NGC 6441. Because single-star evolution at the low stellar mass of present-epoch GCs was considered incapable of producing visible PNe, their origin presented a puzzle. We imaged the PN JaFu 1 with the Hubble Space Telescope (HST) to obtain photometry of its central star (CS) and high-resolution morphological information. We imaged IRAS 18333-2357 with better depth and resolution, and we analyzed its archival HST spectra to constrain its CS temperature and luminosity. All PNe in Galactic GCs now have quality HST data, allowing us to improve CS mass estimates. We find reasonably consistent masses between 0.53 and 0.58 M {sub ⊙} for all four objects, though estimates vary when adopting different stellar evolutionary calculations. The CS mass of IRAS 18333-2357, though, depends strongly on its temperature, which remains elusive due to reddening uncertainties. For all four objects, we consider their CS and nebula masses, their morphologies, and other incongruities to assess the likelihood that these objects formed from binary stars. Although generally limited by uncertainties (∼0.02 M {sub ⊙}) in post-AGB tracks and core mass versus luminosity relations, the high-mass CS in K 648 indicates a binary origin. The CS of JaFu 1 exhibits compact, bright [O iii] and H α emission, like EGB 6, suggesting a binary companion or disk. Evidence is weaker for a binary origin of JaFu 2.

  19. Ensayo del modelo de calidad aplicado a software de minería de datos

    OpenAIRE

    García Márquez, Marilupe

    2015-01-01

    Este trabajo presenta una investigación acerca de los estándares de calidad de software ISO-IEC 9126 e ISO-IEC 14598, con la finalidad de reconocer la importancia de su aplicación durante la etapa de desarrollo de software. En este sentido, se plantea la necesidad de aplicar la calidad de software en las etapas de diseño, construcción e implantación para lograr un producto final con un alto porcentaje de calidad. Asimismo, con el propósito de medir la calidad, se establece la necesida...

  20. El software matemático y los lenguajes de programación

    OpenAIRE

    Quesada, José

    1996-01-01

    Se lleva a cabo un análisis de los lenguajes de programación desde el punto de vista de sus relaciones con el software matemático. Para ello se comienza con una definición bastante flexible de software matemático, para continuar con un análisis metodológico de los lenguajes de programación, estudiando los paradigmas imperativo, funcional, la programación lógica y la orientación a objetos. Por último se realiza un estudio histórico de los lenguajes de programación, así como de los lenguajes de...

  1. Gestión de conocimiento: la solución para disminuir el reproceso en las pruebas de software

    Directory of Open Access Journals (Sweden)

    Luz A. Perona Ossaba

    2012-12-01

    Full Text Available La gestión de conocimiento se ha convertido en una clave fundamental en los procesos de la ingeniería de software, permitiendo mejorar y optimizar cada una de las actividades que se ejecutan durante todo el ciclo de desarrollo de software. Cada una de las etapas de la ingeniería de software ha adoptado de la gestión de conocimiento algunas características, de acuerdo con las necesidades que se presentan, adecuándolos y fortaleciéndolos para reducir los tiempos y disminuir la fuga de información dentro de las organizaciones. Es por esto que las pruebas de software han adoptado la gestión de conocimiento como la alternativa para disminuir el reproceso en las pruebas de software.

  2. Arquitectura de Software de Referencia para Objetos Inteligentes en Internet de las Cosas

    Directory of Open Access Journals (Sweden)

    Ariel Alejandro Segura

    2016-06-01

    Full Text Available La evolución de los sistemas embebidos, que tuvo lugar junto al bajo costo y ubicuidad de internet, ha tenido como resultado el paradigma Internet de las Cosas. El objetivo de este paradigma es convertir los objetos que nos rodean en objetos inteligentes de forma tal que, comunicándose a través de Internet, puedan percibir lo que sucede en su entorno y poder reaccionar frente a ello. Se han llevado a cabo numerosos trabajos en materia de estandarización para este paradigma como, por ejemplo, protocolos de comunicación, topologías de red y arquitecturas software de alto nivel que consideran, por sobre todas las cosas, cómo integrar todas las piezas de una solución de Internet de las Cosas en un solo sistema. Sin embargo, no se han identificado arquitecturas de software para la construcción del software de un objeto inteligente que describa los componentes básicos que se deben incluir. En este trabajo se propone una arquitectura de referencia para la construcción de objetos inteligentes en Internet de las Cosas cuyo objetivo es que los ingenieros de software tengan una estructura en la cual basarse y poder reutilizar.

  3. La Esencia de la Ingeniería de Software: El Núcleo de Semat

    Directory of Open Access Journals (Sweden)

    Ivar Jacobson

    2013-06-01

    Full Text Available Esta es una traducción del artículo que se publicó en Communications of the ACM en Diciembre de 2012 bajo el título “The Essence of Software Engineering: The SEMAT Kernel” y se realiza debido a la importancia que adquiere el tema para la audiencia de hispanoparlantes, de forma que se pueda generar un acceso a lo que constituye uno de los últimos adelantos en Ingeniería de Software. Nota: Artículo publicado originalmente en Communications of the ACM, vol. 55, no. 12, december 2012, pp. 42-49. El traductor declara tener autorización de los autores para difundir la versión en español en la Revista Latinoamericana de Ingeniería de Software, sin que ello presente incompatibilidades o vulnere los derechos de Communications of the ACM.

  4. Towards an Understanding of Enabling Process Knowing in Global Software Development: A Case Study

    DEFF Research Database (Denmark)

    Zahedi, Mansooreh; Babar, Muhammad Ali

    2014-01-01

    Shared understanding of Software Engineering (SE) processes, that we call process knowing, is required for effective communication and coordination and communication within a team in order to improve team performance. SE Process knowledge can include roles, responsibilities and flow of informatio...... challenges of lack of process knowing and how an organization can enable process knowing for achieving the desired results that also help in increasing social interactions and positive behavioral changes......Shared understanding of Software Engineering (SE) processes, that we call process knowing, is required for effective communication and coordination and communication within a team in order to improve team performance. SE Process knowledge can include roles, responsibilities and flow of information...... over a project lifecycle. Developing and sustaining process knowledge can be more challenging in Global Software Development (GSD). GSD distances can limit the ability of a team to develop a common understanding of processes. Anecdotes of the problems caused by lack of common understanding of processes...

  5. Certificación de la Mantenibilidad del Producto Software: Un Caso Práctico

    Directory of Open Access Journals (Sweden)

    Moisés Rodríguez

    2015-07-01

    Full Text Available La calidad del software está adquiriendo durante los últimos años una gran importancia, principalmente debido a que el software está presente en prácticamente todo lo que nos rodea y se hace necesario asegurar su correcto funcionamiento. Sin embargo, hasta ahora la mayor parte de los estudios se han centrado en evaluar la calidad de los procesos de desarrollo, y aunque existen trabajos centrados en la calidad del producto software, no existe todavía una propuesta completa para la evaluación y certificación de la calidad del producto software, basada en la nueva familia de normas ISO/IEC 25000. El presente artículo expone un caso de estudio de evaluación, mejora y certificación de la mantenibilidad de un producto software, en el que han participado una empresa desarrolladora de software, un laboratorio de evaluación acreditado y una entidad de certificación. Para ello, se presentarán las características de este tipo de evaluaciones, el rol que cumple cada una de las entidades participantes y el proceso seguido desde la evaluación inicial hasta la certificación definitiva

  6. EMULACIÓN DE ESCENARIOS VIRTUALES, EN UNA SDWLAN (SOFTWARE DEFINED WIRELESS LOCAL AREA NETWORK, DE UN CAMPUS UNIVERSITARIO

    Directory of Open Access Journals (Sweden)

    Gerlyn Duarte

    2015-07-01

    Full Text Available Las redes definidas por software (SDN = Software Defined Network es una arquitectura de red emergente que se destaca como una tecnología capaz de ofrecer un control más flexible y dinámico a la hora de gestionar el diseño y funciones de la red, donde se separan los planos de control y enrutamiento. Esto permite la centralización de los controles de la red basada en software. Se puede decir que es posible tener flexibilidad y rapidez al momento de configurar, implementar y administrar diferentes protocolos personalizados para los requerimientos de distintas redes. Actualmente, en una red convencional, cada conmutador y/o enrutador tienen software propietario que le dice qué hacer. SDN se centra principalmente en la parte cableada de la red de datos. Sin embargo, todas las ventajas de las SDN sólo se obtienen si se logra abarcar la totalidad de la infraestructura, desde el centro de datos al extremo de la red, permitiendo extender todos los beneficios de SDN hasta la red inalámbrica, para conseguir a su vez una red inalámbrica de área local definida por software (SDWLAN = Software Define Wireless Local Area Network. Es por ello que en el presente trabajo, se emuló parte de una SDWLAN de un campus universitario para observar la factibilidad de implementar SDN en la misma. Para la emulación se utilizó una variante del emulador Mininet que permite trabajar con redes inalámbricas. De igual forma, se efectuaron mediciones del ancho de banda de las SDWLAN emuladas, así como la interconectividad entre ellas. Se evidenció la facilidad y el rendimiento de trabajar con las herramientas de emulación de SDWLAN empleadas, permitiendo de igual forma la estructuración de distintas topologías de SDWLAN. Se comprobó que el emulador, el cual está aún en la fase beta, permite interactuar y ejecutar cualquier proceso como si se ejecutara directamente en un equipo con GNU/Linux de forma eficaz.

  7. WFIRST Microlensing Exoplanet Characterization with HST Follow up

    Science.gov (United States)

    Bhattacharya, Aparna; David Bennett, Jay Anderson, J.P. Beaulieu.

    2018-01-01

    More than 50 planets are discovered with the different ground based telescopes available for microlensing. But the analysis of ground based data fails to provide a complete solution. To fulfill that gap, space based telescopes, like Hubble space telescope and Spitzer are used. My research work focuses on extracting the planet mass, host star mass, their separation and their distance in physical units from HST Follow-up observations. I will present the challenges faced in developing this method.This is the primary method to be used for NASA's top priority project (according to 2010 decadal survey) Wide Field InfraRed Survey Telescope (WFIRST) Exoplanet microlensing space observatory, to be launched in 2025. The unique ability of microlensing is that with WFIRST it can detect sub-earth- mass planets beyond the reach of Kepler at separation 1 AU to infinity. This will provide us the necessary statistics to study the formation and evolution of planetary systems. This will also provide us with necessary initial conditions to model the formation of planets and the habitable zones around M dwarf stars.

  8. A Guideline of Using Case Method in Software Engineering Courses

    Science.gov (United States)

    Zainal, Dzulaiha Aryanee Putri; Razali, Rozilawati; Shukur, Zarina

    2014-01-01

    Software Engineering (SE) education has been reported to fall short in producing high quality software engineers. In seeking alternative solutions, Case Method (CM) is regarded as having potential to solve the issue. CM is a teaching and learning (T&L) method that has been found to be effective in Social Science education. In principle,…

  9. El desarrollo de software dirigido por modelos en los repositorios institucionales

    Directory of Open Access Journals (Sweden)

    Jose Texier

    2014-01-01

    Full Text Available Los Repositorios Institucionales (RI se han consolidado en la academia, prueba de ello es el crecimiento en número de registros en los directorios existentes realizado por diferentes vías: autoarchivo por parte de autores, la incorporación de material a cargo de bibliotecarios, entre otras. En este trabajo se hace un relevamiento bibliográfico sobre el uso del enfoque de Desarrollo de Software Dirigido por Modelos (MDD en los sistemas de RI con el propósito de establecer una relación entre ellos. El MDD es un paradigma de construcción de software que asigna a los modelos un rol central y se derivan modelos que van desde los más abstractos a los más concretos. Este paradigma, además, proporciona un marco de trabajo que permite a los interesados compartir sus puntos de vista y manipular las representaciones de las entidades del dominio. En conclusión, el seguimiento de las diferentes investigaciones relevadas y lo aquí expuesto permiten incentivar implementaciones de software para los RI.

  10. RESEÑA DEL SOFTWARE DISPONIBLE EN COLOMBIA PARA LA GESTIÓN DE INVENTARIOS EN CADENAS DE ABASTECIMIENTO

    Directory of Open Access Journals (Sweden)

    VALENTINA GUTIÉRREZ

    2009-01-01

    Full Text Available La gestión de los diferentes tipos de inventario a lo largo de una cadena de abastecimiento es un problema complejo que, en la mayoría de los casos de la industria colombiana e internacional, se aborda mediante la implementación de herramientas de software. Sin embargo, la decisión de implementar dichas herramientas está en muchos casos limitada por la capacidad financiera para invertir en ellas y por el desconocimiento de la oferta de software disponible en Colombia. Este artículo presenta una reseña del software disponible en Colombia para la gestión de inventarios con el fin de brindar a las empresas que se enfrentan a la decisión de implementar un software, una herramienta de soporte que indique cuál es la oferta en Colombia y cuáles son las características de los sistemas disponibles. Para esto se presenta primero el estado del arte, en el cual se identifica el resultado de la revisión de la literatura y el uso de las herramientas de software en la industria colombiana. Seguidamente se presenta la caracterización de los productos de software disponibles en el país. Dicha caracterización permite identificar la configuración general de los productos, los módulos de gestión con los que cuenta, las opciones de integración con otras herramientas informáticas, y la información general de precios e instalación. Finalmente se presentan las conclusiones del estudio y las futuras oportunidades de investigación.

  11. HST/WFC3 Early Release Science In The GOODS-South Field: UV-dropout Galaxies At Z=2-3

    Science.gov (United States)

    Hathi, Nimish P.; Ryan, R. E., Jr.; Cohen, S. H.; Yan, H.; Windhorst, R. A.; McCarthy, P. J.; O'Connell, R. W.; Koekemoer, A. M.; SOC, WFC3

    2010-01-01

    We combine new high sensitivity of Ultraviolet (UV) imaging from the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST) with existing deep HST/ACS optical (F435W, F606W, F775W and F850LP) images from the GOODS program to identify UV-dropouts, which are galaxy candidates at z=2-3. These new HST/WFC3 observations were taken over 50 sq. arcminutes in the GOODS-South field as a part of the Early Release Science program. The uniqueness of these new UV data is that they are observed in 3 filters (F225W, F275W and F336W), which allows us to identify two different sets of UV-dropout samples. We apply (F275W-F336W) vs. (F336W-F435W) color selection criteria to identify F275W-dropout (z=2) galaxy candidates and (F336W-F435W) vs. (F435W-F606W) criteria to identify F336W-dropout (z=3) galaxy candidates. Multi-wavelength imaging and extensive spectroscopic follow-up observations in this field enable us to carefully access validity of our UV-dropout candidates. We estimate number counts and rest-frame UV Luminosity functions for galaxies at z=2-3, and these results are compared to other surveys at similar redshifts. This project is based on Early Release Science observations made by the WFC3 Scientific Oversight Committee. We are grateful to the Director of the Space Telescope Science Institute for awarding Director's Discretionary time for this program. Support for program #11359 was provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.

  12. Optimización de estados en la mejora de procesos de software

    Directory of Open Access Journals (Sweden)

    Ana Marys García Rodríguez

    2016-08-01

    Full Text Available En el desarrollo de software, se refleja una tendencia orientada hacia la definición y mejora continua de los procesos que promueven estratégicamente el respaldo y logro de las metas de una organización. En función de ello, el objetivo del artículo es desarrollar un proceso para la optimización de estados en la mejora de procesos de software, tomando como referencia los factores críticos de éxito. Se fundamenta en una investigación descriptiva bajo un enfoque racionalista crítico, método de análisis cuantitativo, lo cual permitió la efectividad del diseño del modelo. Se determina en los resultados que en la mejora de procesos de software existen considerable fracasos, lo cual se atribuye a que no se tiene en cuenta el estado de la organización integralmente, ni su ámbito de actuación en lo socio-cultural. Se concluye, sobre la importancia de definir una evaluación integral de las organizaciones, considerando los factores críticos del éxito, previo al inicio de una mejora de procesos, asimismo se recomienda el diseño propuesto como soporte tecnológico, que basado en un algoritmo genético, obtiene estados de mejora requeridos por las organizaciones como apoyo a la toma de decisiones a partir de su estado inicial y las buenas prácticas que puede aplicar para mejorarlo.

  13. Arquitectura de software para los actuales Sistemas Ciber-Físicos

    Directory of Open Access Journals (Sweden)

    Jeannette S. Ting

    2011-06-01

    Full Text Available La próxima generación de sistemas ciber-físicos –CPS– plantea grandes desafíos en el diseño de software. No se trata sólo de diseñar un sistema en torno a los plazos de ejecución, lo más importante es maximizar la utilización de recursos. En este artículo se propone un sistema de base para la arquitectura de software en el que los servicios se puedan diseñar e implementar y componer fácilmente de acuerdo con la demanda y mediante aplicaciones individuales, de manera que satisfagan requisitos específicos de confianza, seguridad, eficiencia, confiabilidad y previsibilidad, mientras que permanecen dentro de la límites de las capacidades del hardware determinado.

  14. Proceso de desarrollo de software con técnicas de creatividad, para las pymes de la ciudad de Neiva

    OpenAIRE

    Martínez Vidal, Eduardo

    2017-01-01

    El proyecto que se presenta en este artículo se origina a partir de una necesidad identificada en empresas de desarrollo de software del municipio de Neiva, relacionada con hacer uso de buenas prácticas en el proceso de desarrollo de software, que permitieran la construcción de productos de calidad con un factor diferenciador. Para dar respuesta a esta necesidad, se realizó la adaptación de un proceso de desarrollo de software, a partir del proceso DAD (Disciplined Agile Delivery), e incorpor...

  15. AN HST PROPER-MOTION STUDY OF THE LARGE-SCALE JET OF 3C273

    Energy Technology Data Exchange (ETDEWEB)

    Meyer, Eileen T.; Georganopoulos, Markos [University of Maryland Baltimore County, Baltimore, MD 21250 (United States); Sparks, William B. [Space Telescope Science Institute, Baltimore, MD 21218 (United States); Anderson, Jay; Marel, Roeland van der; Biretta, John; Chiaberge, Marco; Norman, Colin [Space Telescope Science Institute, Baltimore, MD 21210 (United States); Tony Sohn, Sangmo [Johns Hopkins University, Baltimore, MD 21210 (United States); Perlman, Eric, E-mail: meyer@stsci.edu [Florida Institute of Technology, Melbourne, FL 32901 (United States)

    2016-02-20

    The radio galaxy 3C 273 hosts one of the nearest and best-studied powerful quasar jets. Having been imaged repeatedly by the Hubble Space Telescope (HST) over the past twenty years, it was chosen for an HST program to measure proper motions in the kiloparsec-scale resolved jets of nearby radio-loud active galaxies. The jet in 3C 273 is highly relativistic on sub-parsec scales, with apparent proper motions up to 15c observed by very long baseline interferometry. In contrast, we find that the kiloparsec-scale knots are compatible with being stationary, with a mean speed of −0.2 ± 0.5c over the whole jet. Assuming the knots are packets of moving plasma, an upper limit of 1c implies a bulk Lorentz factor Γ < 2.9. This suggests that the jet has either decelerated significantly by the time it reaches the kiloparsec scale, or that the knots in the jet are standing shock features. The second scenario is incompatible with the inverse Compton off the Cosmic Microwave Background (IC/CMB) model for the X-ray emission of these knots, which requires the knots to be in motion, but IC/CMB is also disfavored in the first scenario due to energetic considerations, in agreement with the recent finding of Meyer and Georganopoulos which ruled out the IC/CMB model for the X-ray emission of 3C 273 via gamma-ray upper limits.

  16. Herramienta de gestión de Modelos Ontológicos aplicados a la Mejora de Procesos Software

    Directory of Open Access Journals (Sweden)

    José Eduardo Guadalupe Gaytán Solís

    2013-12-01

    Full Text Available Actualmente el software representa un componente principal en el desarrollo de las actividades dentro de las organizaciones. Este hecho hace que la calidad del software sea uno de los principales factores claves a los que se dedica mucho esfuerzo. La calidad del software permite de manera implícita la creación de valor agregado al software durante su desarrollo, resultando en un factor de competitividad en estas organizaciones. Éste trabajo propone una solución inteligente mediante el uso de gestión del conocimiento, con el fin de hacer que la aplicación de teorías de ingeniería de software, modelos y estándares de mejora de procesos sea de fácil implementación y a un menor costo. Específicamente, en este trabajo se presenta el desarrollo de un modelo ontológico basado el Cuerpo de Conocimientos de la Ingeniería de Software (SWEBOK por las siglas en inglés de Software Engineering Body of Knowledge así como su aplicación práctica mediante un sistema software. Finalmente se presentan los resultados de la implementación de técnicas, métricas y actividades correspondientes al área de conocimiento de pruebas de software de SWEBOK. Así mismo se presentan resultados de la integración del marco base de datos de lenguaje ontológico web (OWLDB por las siglas en ingles ontology web language data base, con el objetivo de almacenar datos de manera persistente durante la aplicación.

  17. Pruebas de Software. Fundamentos y Técnicas

    OpenAIRE

    Sánchez Peño, José Manuel

    2015-01-01

    Este proyecto estudia los fundamentos y las técnicas de las pruebas de software. Veremos lo importante que pueden llegar a ser las pruebas, mostrando diferentes desastres causados por fallos en el software. También estudiaremos las diferentes herramientas que se utilizan para llevar a cabo la gestión, administración y ejecución de estas pruebas. Finalmente aplicaremos los conceptos estudiados mediante un caso práctico. Crearemos los casos de prueba funcionales basándonos en las espec...

  18. Searching for faint AGN in the CDFS: an X-ray (Chandra) vs optical variability (HST) comparison.

    Science.gov (United States)

    Georgantopoulos, I.; Pouliasis, E.; Bonanos, A.; Sokolovsky, K.; Yang, M.; Hatzidimitriou, D.; Bellas, I.; Gavras, P.; Spetsieri, Z.

    2017-10-01

    X-ray surveys are believed to be the most efficient way to detect AGN. Recently though, optical variability studies are claimed to probe even fainter AGN. We are presenting results from an HST study aimed to identify Active Galactic Nuclei (AGN) through optical variability selection in the CDFS.. This work is part of the 'Hubble Catalogue of Variables'project of ESA that aims to identify variable sources in the Hubble Source Catalogue.' In particular, we used Hubble Space Telescope (HST) z-band images taken over 5 epochs and performed aperture photometry to derive the lightcurves of the sources. Two statistical methods (standard deviation & interquartile range) resulting in a final sample of 175 variable AGN candidates, having removed the artifacts by visual inspection and known stars and supernovae. The fact that the majority of the sources are extended and variable indicates AGN activity. We compare the efficiency of the method by comparing with the 7Ms Chandra detections. Our work shows that the optical variability probes AGN at comparable redshifts but at deeper optical magnitudes. Our candidate AGN (non detected in X-rays) have luminosities of L_x<6×10^{40} erg/sec at z˜0.7 suggesting that these are associated with low luminosity Seyferts and LINERS.

  19. Modelo de aseguramiento de la calidad en el proceso de desarrollo de software basado en los modelos de madurez de capacidades (CMMi), proceso de software para equipos (TSP) y personas (PSP)

    OpenAIRE

    Espejo Chavarría, Alex José

    2016-01-01

    Genera e implementa un modelo de aseguramiento de la calidad en el proceso de desarrollo de software con un enfoque orientado al factor humano; factor que es responsable de introducir y gestionar la calidad en el proceso de desarrollo de software. El modelo propuesto se basa en tres modelos “Modelos de Madurez de Capacidades Integrado, Proceso de Software para Equipos y Proceso de Software para Personas. Tesis

  20. A Study on the Software Quality Assurance Plan

    International Nuclear Information System (INIS)

    Kim, Hyun Tae

    2006-01-01

    On 25 August 2006, the CMMI V1.2 (Capability Maturity Model Integration Version 1.2) was released with the new title CMMI-DEV (CMMI for Development) which supersedes the CMMI-SE/SW (CMMI for systems engineering and software engineering) V1.1. This study discusses the application of IEEE Std 730-2002, IEEE Standard for Software Quality Assurance Plans, for the implementation of the Process and Product Quality Assurance (PPQA) process area (PA) of the CMMI-DEV

  1. Hybrid 95: Software for the design of hybrid systems, Potrerillo of Santa Teresa; Hybrid 95: Software de diseno de sistemas hibridos, Potrerillo de Santa Teresa

    Energy Technology Data Exchange (ETDEWEB)

    Casaravilla, G.; Chaer, R. [Instituto de Ingenieria Electrica, Facultad de Ingenieria, Universidad de la Republica, Montevideo (Uruguay)

    1997-12-31

    This paper describes the software Hybrid 95 and how it is used for the design of hybrid systems. As an application example some of the design stages are looked over (determination of the wind resource, simulations for sizing generation/storage and topology) of the Potrerillo installation. Taking into account the site clear ecological connotations, during the design consideration is made of the visual impact that represents the possible wind-generator, therefore several locations and wind-generator heights are studied, even arriving to the wind-generation elimination. [Espanol] Este trabajo describe el software Hybrid 95 y como se utiliza a los efectos del diseno de sistemas hibridos. Como ejemplo de aplicacion se recorren algunas de las etapas del diseno (determinacion del recurso eolico, simulaciones para el dimensionado de generacion/acumulacion y topologia) de la instalacion de Potrerillo. Teniendo en cuenta las claras connotaciones ecologistas del lugar, durante el diseno se tiene presente el impacto visual que representa el eventual aerogenerador por lo que se estudian diversas ubicaciones y alturas de aerogenerador, llegandose incluso a estudiar la eliminacion de la generacion eolica.

  2. Hybrid 95: Software for the design of hybrid systems, Potrerillo of Santa Teresa; Hybrid 95: Software de diseno de sistemas hibridos, Potrerillo de Santa Teresa

    Energy Technology Data Exchange (ETDEWEB)

    Casaravilla, G; Chaer, R [Instituto de Ingenieria Electrica, Facultad de Ingenieria, Universidad de la Republica, Montevideo (Uruguay)

    1998-12-31

    This paper describes the software Hybrid 95 and how it is used for the design of hybrid systems. As an application example some of the design stages are looked over (determination of the wind resource, simulations for sizing generation/storage and topology) of the Potrerillo installation. Taking into account the site clear ecological connotations, during the design consideration is made of the visual impact that represents the possible wind-generator, therefore several locations and wind-generator heights are studied, even arriving to the wind-generation elimination. [Espanol] Este trabajo describe el software Hybrid 95 y como se utiliza a los efectos del diseno de sistemas hibridos. Como ejemplo de aplicacion se recorren algunas de las etapas del diseno (determinacion del recurso eolico, simulaciones para el dimensionado de generacion/acumulacion y topologia) de la instalacion de Potrerillo. Teniendo en cuenta las claras connotaciones ecologistas del lugar, durante el diseno se tiene presente el impacto visual que representa el eventual aerogenerador por lo que se estudian diversas ubicaciones y alturas de aerogenerador, llegandose incluso a estudiar la eliminacion de la generacion eolica.

  3. INCOSE Systems Engineering Handbook v3.2: Improving the Process for SE Practitioners

    Energy Technology Data Exchange (ETDEWEB)

    R. Douglas Hamelin; David D. Walden; Michael E. Krueger

    2010-07-01

    The INCOSE Systems Engineering Handbook is the official INCOSE reference document for understanding systems engineering (SE) methods and conducting SE activities. Over the years, the Handbook has evolved to accommodate advances in the SE discipline and now serves as the basis for the Certified Systems Engineering Professional (CSEP) exam. Due to its evolution, the Handbook had become somewhat disjointed in its treatment and presentation of SE topics and was not aligned with the latest version of International Organization for Standardization (ISO)/International Electrotechnical Commission (IEC) 15288:2008, Systems and Software Engineering. As a result, numerous inconsistencies were identified that could confuse practitioners and directly impact the probability of success in passing the CSEP exam. Further, INCOSE leadership had previously submitted v3.1 of the Handbook to ISO/IEC for consideration as a Technical Report, but was told that the Handbook would have to be updated to conform with the terminology and structure of new ISO/IEC15288:2008, Systems and software engineering, prior to being considered. The revised INCOSE Systems Engineering Handbook v3.2 aligns with the structure and principles of ISO/IEC 15288:2008 and presents the generic SE life-cycle process steps in their entirety, without duplication or redundancy, in a single location within the text. As such, the revised Handbook v3.2 serves as a comprehensive instructional and reference manual for effectively understanding SE processes and conducting SE and better serves certification candidates preparing for the CSEP exam.

  4. SeDiCI: Servicio de Difusión de la Creación Intelectual

    Directory of Open Access Journals (Sweden)

    Marisa R. de Giusti

    2008-07-01

    Full Text Available Presenta el Servicio de Difusión de la Creación Intelectual (SeDiCI de la Universidad Nacional de La Plata (UNLP, Argentina, desde el punto de vista de los objetivos que condujeron a la UNLP a su creación. Se describen en detalle las etapas por las que se atravesó para poner en marcha este repositorio institucional y especialmente las facilidades que provee el software Celsius-DL desarrollado en la UNLP que soporta el Portal de SeDiCI.

  5. Metodología iterativa de desarrollo de software para microempresas

    Directory of Open Access Journals (Sweden)

    Luis Alexander Calvo-Valverde

    2015-09-01

    El presente trabajo hace un diagnóstico sobre las características de las microempresas costarricenses de desarrollo de software; seguidamente, determina las mejores prácticas en las metodologías de desarrollo de software, para luego hacer un análisis comparativo y proponer una metodología de desarrollo que se adecúe a este tipo de organizaciones.

  6. Leveraging 3D-HST Grism Redshifts to Quantify Photometric Redshift Performance

    Science.gov (United States)

    Bezanson, Rachel; Wake, David A.; Brammer, Gabriel B.; van Dokkum, Pieter G.; Franx, Marijn; Labbé, Ivo; Leja, Joel; Momcheva, Ivelina G.; Nelson, Erica J.; Quadri, Ryan F.; Skelton, Rosalind E.; Weiner, Benjamin J.; Whitaker, Katherine E.

    2016-05-01

    We present a study of photometric redshift accuracy in the 3D-HST photometric catalogs, using 3D-HST grism redshifts to quantify and dissect trends in redshift accuracy for galaxies brighter than JH IR > 24 with an unprecedented and representative high-redshift galaxy sample. We find an average scatter of 0.0197 ± 0.0003(1 + z) in the Skelton et al. photometric redshifts. Photometric redshift accuracy decreases with magnitude and redshift, but does not vary monotonically with color or stellar mass. The 1σ scatter lies between 0.01 and 0.03 (1 + z) for galaxies of all masses and colors below z 2), dusty star-forming galaxies for which the scatter increases to ˜0.1 (1 + z). We find that photometric redshifts depend significantly on galaxy size; the largest galaxies at fixed magnitude have photo-zs with up to ˜30% more scatter and ˜5 times the outlier rate. Although the overall photometric redshift accuracy for quiescent galaxies is better than that for star-forming galaxies, scatter depends more strongly on magnitude and redshift than on galaxy type. We verify these trends using the redshift distributions of close pairs and extend the analysis to fainter objects, where photometric redshift errors further increase to ˜0.046 (1 + z) at {H}F160W=26. We demonstrate that photometric redshift accuracy is strongly filter dependent and quantify the contribution of multiple filter combinations. We evaluate the widths of redshift probability distribution functions and find that error estimates are underestimated by a factor of ˜1.1-1.6, but that uniformly broadening the distribution does not adequately account for fitting outliers. Finally, we suggest possible applications of these data in planning for current and future surveys and simulate photometric redshift performance in the Large Synoptic Survey Telescope, Dark Energy Survey (DES), and combined DES and Vista Hemisphere surveys.

  7. Resolving Supernovae, H0, and the Equation of State with HST

    Science.gov (United States)

    Strolger, Louis-Gregory; Rohde, A. C.; Gorski, M. J.; Riess, A. G.; Lampeitl, H.; Ferguson, H. C.; Martel, A. R.

    2006-12-01

    There is little understood about the nature of the dark energy component of the universe. Presently, inconsistency in the value of the Hubble constant and the limited sample of Type Ia supernovae (SNeIa) at z>1 provide the largest sources of uncertainty in the evolutionary nature of dark energy. There is also growing suspicion that SNeIa may be the result of at least two physical mechanisms, which may produce unnoticed effects in cosmological parameters. The preferred bulk mechanism for SN Ia progenitors, and more importantly the accuracy of the same empirical corrections over all redshifts, can be ascertained by studying the rate of SNeIa in the early universe. The notably few SNeIa found at z>1.4 in the deep HST surveys have suggested that most SNeIa take 3-4 Gyr to develop from a single burst of star formation. Simple tests of this conclusion would be to gather a more statistically significant sample of SNeIa in the desired redshift range, or just a few events at z>2. We present our new investigations with HST into these critical issues. Our Cycle 15 program, SHOES, continues the search for SNeIa at z>1 with ACS, but has an added component of simultaneous observations with NICMOS of Cepheids in galaxies that have hosted well studied SNeIa. These observations are expected to greatly reduce the uncertainty in H_0 (likewise reducing uncertainty in Omega_M), which along with the increased overall z>1 sample, will likely reduce dark energy constraints by approximately 40%. With the addition of the SHOES sample to those from PANS and GOODS, we will have nearly 4 times as many z>1 SNeIa to test the bulk delay of SNeIa from the cosmic star formation rate history. And by performing creative combinations of the data, we will ultimately produce an ultra deep survey for possible z>2 SNeIa.

  8. Prueba del software: más que una fase en el ciclo de vida/Software testing: more than a stage in the life cycle

    Directory of Open Access Journals (Sweden)

    Edgar Serna

    2011-12-01

    Full Text Available La prueba de software es probablemente la parte menos comprendida del ciclo de vida del desarrollo de software. En este trabajo, mediante una propuesta metodológica de cuatro fases, se muestra por qué es difícil detectar y eliminar errores, por qué es complejo el proceso de realizar pruebas y por qué es necesario prestarle más atención.Software testing probably is the least understood part of the software testing life cycle. In this work, by means of a methodological proposal of four stages, is showed why is complex the process of carrying out the testing software, why is necessary to pay it more attention and why is so difficult to detect and delete the mistakes.

  9. PRAPRAG: software para planejamento racional de máquinas agrícolas PRAPRAG: software for rational planning of agricultural machines

    Directory of Open Access Journals (Sweden)

    Erivelto Mercante

    2010-04-01

    Full Text Available O software PRAPRAG é uma ferramenta de escolha de máquinas e implementos agrícolas que apresentam o menor custo por área ou por quantidade produzida, bem como, faz o planejamento de aquisição das máquinas para a propriedade agrícola, do ponto de vista técnico e econômico. Foi utilizada a linguagem de programação Borland Delphi 3.0 e, a partir de prospectos das máquinas e implementos, criou-se um banco de dados onde o usuário pode cadastrar e modificar suas características de uso. O software mostrou-se uma ferramenta útil e uso amigável. O software proporciona maior rapidez, segurança e confiabilidade ao processo produtivo e econômico das propriedades, na seleção e aquisição de conjuntos mecanizados agrícolas, e na determinação de custos com a mão de obra utilizada.The software PRAPRAG is a tool used for choosing agricultural machines and implements that present the lowest cost per area or produced amount, as well as, to it makes the machines acquisition planning for the agricultural property, from both technical and economical points of view. It was used the programming language Borland Delphi 3.0. From the machine and implement handouts, it was created a database where the user can register and modify their characteristics of use. The software showed to be a useful and friendly tool. The software provides high speed, safety and reliability for the productive and economical process of the properties, at the selection and acquisition of agricultural systems, as well as for the determination of costs with the used labor.

  10. SOFTWARE FOR FAULT DIAGNOSIS USING KNOWLEDGE MODELS IN PETRI NETS

    Directory of Open Access Journals (Sweden)

    ADRIAN ARBOLEDA

    2012-01-01

    Full Text Available Los sistemas de diagnóstico de fallas en empresas asociadas al sector eléctrico requieren propiedades de precisión y flexibilidad cuando surgen eventos de falla. Actualmente existen sistemas que pretenden mejorar el proceso de diagnóstico mediante varios métodos y técnicas computacionales, reduciendo el tiempo de respuesta a perturbaciones. Sin embargo, son pocas las propuestas que unifican modelos gráficos de conocimiento con las señales de un proceso que pueden ofrecer dispositivos como controladores lógicos programables (PLCs. Este artículo propone un software novedoso guiado por modelos basados en redes de Petri e integrado con señales del proceso, para el diagnóstico de falla en centrales de generación eléctrica. Un caso de estudio demuestra la flexibilidad y adaptabilidad del software cuando nuevas nociones en los modelos de conocimiento cambian, sin realizar procedimientos de reingeniería al software.

  11. Repositorios digitales y software open source

    Directory of Open Access Journals (Sweden)

    Doria, María Vanesa

    2015-06-01

    Full Text Available En la actualidad las universidades se encuentran en constante evolución, fruto de la transformación generada por la sociedad de la información y el conocimiento, donde la transversalidad son las Tecnologías de la Información y Comunicación (TIC, que tienen como objetivo ampliar el acceso a la información y el conocimiento a través de su herramienta digital más distinguida, Internet. Las universidades retroalimentan su conocimiento e información, mediante las producciones científicasacadémicas, y para promover el acceso a ellas, muchas universidades están inclinándose al movimiento del Acceso Abierto (AA siguiendo la vía verde en el desarrollo de repositorios digitales (RD. Para la creación de RD es necesario analizar los software open source disponibles, dado que estos son las herramientas que facilitan la automatización de los mismos. El presente estudio se centra en el análisis de los software open source existentes en el mercado.

  12. Una Revisión Sistemática en los Marcos de Trabajo de Desarrollo Software en las MiPyMEs Productoras de Software

    OpenAIRE

    Antonio A. Aguileta; Grisel B. Ancona; Edwin J. León; Juan P. Ucán

    2015-01-01

    Una revisión sistemática es considerada como un método o protocolo que permite sintetizar investigaciones científicas de diversas áreas, la Ingeniería de Software no es la excepción. En este artículo se presenta este protocolo aplicado en la búsqueda de publicaciones relacionadas con las adaptaciones a los marcos de trabajo de desarrollo de software llevadas a cabo en MiPyMEs desarrolladoras de software, en el período comprendido de 1995 al 2013, centrándose en tendencias, países y sectores q...

  13. HST HOT-JUPITER TRANSMISSION SPECTRAL SURVEY: CLEAR SKIES FOR COOL SATURN WASP-39b

    Energy Technology Data Exchange (ETDEWEB)

    Fischer, Patrick D.; Knutson, Heather A. [Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125 (United States); Sing, David K.; Kataria, Tiffany; Nikolov, Nikolay [Astrophysics Group, School of Physics, University of Exeter, Stocker Road, Exeter, EX4 4QL (United Kingdom); Henry, Gregory W.; Williamson, Michael W. [Center of Excellence in Information Systems, Tennessee State University, Nashville, TN 37209 (United States); Fortney, Jonathan J. [Department of Astronomy and Astrophysics, University of California Santa Cruz, CA 95064 (United States); Burrows, Adam S. [Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544 (United States); Showman, Adam P.; Ballester, Gilda E. [Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721 (United States); Désert, Jean-Michel [CASA, Department of Astrophysical and Planetary Sciences, University of Colorado, 389-UCB, Boulder, CO 80309 (United States); Aigrain, Suzanne [Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH (United Kingdom); Deming, Drake [Department of Astronomy, University of Maryland, College Park, MD 20742 (United States); Etangs, Alain Lecavelier des; Vidal-Madjar, Alfred [CNRS, Institut dAstrophysique de Paris, UMR 7095, 98bis boulevard Arago, F-75014 Paris (France)

    2016-08-10

    We present the Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS) optical transmission spectroscopy of the cool Saturn-mass exoplanet WASP-39b from 0.29-1.025 μ m, along with complementary transit observations from Spitzer IRAC at 3.6 and 4.5 μ m. The low density and large atmospheric pressure scale height of WASP-39b make it particularly amenable to atmospheric characterization using this technique. We detect a Rayleigh scattering slope as well as sodium and potassium absorption features; this is the first exoplanet in which both alkali features are clearly detected with the extended wings predicted by cloud-free atmosphere models. The full transmission spectrum is well matched by a clear H{sub 2}-dominated atmosphere, or one containing a weak contribution from haze, in good agreement with the preliminary reduction of these data presented in Sing et al. WASP-39b is predicted to have a pressure-temperature profile comparable to that of HD 189733b and WASP-6b, making it one of the coolest transiting gas giants observed in our HST STIS survey. Despite this similarity, WASP-39b appears to be largely cloud-free, while the transmission spectra of HD 189733b and WASP-6b both indicate the presence of high altitude clouds or hazes. These observations further emphasize the surprising diversity of cloudy and cloud-free gas giant planets in short-period orbits and the corresponding challenges associated with developing predictive cloud models for these atmospheres.

  14. The HST/ACS Coma Cluster Survey - VII. Structure and assembly of massive galaxies in the centre of the Coma cluster

    NARCIS (Netherlands)

    Weinzirl, Tim; Jogee, Shardha; Neistein, Eyal; Khochfar, Sadegh; Kormendy, John; Marinova, Irina; Hoyos, Carlos; Balcells, Marc; den Brok, Mark; Hammer, Derek; Peletier, Reynier F.; Kleijn, Gijs Verdoes; Carter, David; Goudfrooij, Paul; Lucey, John R.; Mobasher, Bahram; Trentham, Neil; Erwin, Peter; Puzia, Thomas

    2014-01-01

    We constrain the assembly history of galaxies in the projected central 0.5 Mpc of the Coma cluster by performing structural decomposition on 69 massive (M⋆ ≥ 109 M⊙) galaxies using high-resolution F814W images from the Hubble Space Telescope (HST) Treasury Survey of Coma. Each galaxy is modelled

  15. Software efical para la gestión eficiente de motores en la industria; Software Efical for Efficient Management of Motors in the Industry

    Directory of Open Access Journals (Sweden)

    Elías V de la Rosa Masdueño

    2011-02-01

    Full Text Available En este trabajo se explica el diseño, e implementación de una herramienta capaz de controlar y gestionareficientemente los motores eléctricos de una industria. Para ello se elaboró un software de fácil manejoque resolviera el problema y que además brindara otras opciones a los usuarios que hicieran uso delmismo. EFICAL®, controla el inventario de los motores y sus equipos accionados, sus parámetrosnominales, mantenimientos y ensayos, permite calcular la eficiencia por distintos métodos y brinda ademásdatos de catálogos de diversos fabricantes.  This work explains the developing and application of a software tool for efficient management of electricmotors in the industry. For this it was develop friendly software that solve the problem and more over givesanother option to users. EFICAL®, controls the motor inventory and the equipment that they drive, theirnominal parameters, maintenance, and testing; also allow the efficiency calculations by various methodsand gives the catalog data of some manufacturers.

  16. Reseña del Software Disponible en Colombia Para la Gestión de Inventarios en Cadenas de Abastecimiento

    Directory of Open Access Journals (Sweden)

    Valentina Gutiérrez

    2009-01-01

    Full Text Available La gestión de los diferentes tipos de inventario a lo largo de una cadena de abastecimiento es un problema complejo que, en la mayoría de los casos de la industria colombiana e internacional, se aborda mediante la implementación de herramientas de software. Sin embargo, la decisión de implementar dichas herramientas está en muchos casos limitada por la capacidad financiera para invertir en ellas y por el desconocimiento de la oferta de software disponible en Colombia. Este artículo presenta una reseña del software disponible en Colombia para la gestión de inventarios con el fin de brindar a las empresas que se enfrentan a la decisión de implementar un software, una herramienta de soporte que indique cuál es la oferta en Colombia y cuáles son las características de los sistemas disponibles. Para esto se presenta primero el estado del arte, en el cual se identifica el resultado de la revisión de la literatura y el uso de las herramientas de software en la industria colombiana. Seguidamente se presenta la caracterización de los productos de software disponibles en el país. Dicha caracterización permite identificar la configuración general de los productos, los módulos de gestión con los que cuenta, las opciones de integración con otras herramientas informáticas, y la información general de precios e instalación. Finalmente se presentan las conclusiones del estudio y las futuras oportunidades de investigación.

  17. Software para Controle de Temperatura em Estufas

    OpenAIRE

    Silva, Antonio Carlos Alves; Universidade Federal de Lavras; Kanazawa, Edna Mie; Universidade Federal de Lavras; de Carvalho, Karina Dutra; Universidade Federal de Lavras; Kinoshita, Vanessa Godoy; Universidade Federal de Lavras; Uchoa, Joaquim Quinteiro; Universidade Federal de Lavras; Lacerda, Wilian Soares; Universidade Federal de Lavras; Schneider, Bruno de Oliveira; Universidade Federal de Lavras

    2004-01-01

    Neste trabalho é apresentado o projeto desenvolvido para controle de temperatura em estufas, denominado CTE, utilizando uma Interface de Aquisição e Controle de Dados. Todo o controle é feito via software, onde pode-se optar por dois tipos de controle: o controle automático, onde é possível definir-se a temperatura mínima e máxima; ou o controle manual, onde o usuário poderá optar por acionar periféricos de aquecimento, resfriamento e desligamento da estufa. Foi desenvolvida também uma interf...

  18. Astrometry, radial velocity, and photometry: the HD 128311 system remixed with data from HST, HET, and APT

    International Nuclear Information System (INIS)

    McArthur, Barbara E.; Benedict, G. Fritz.; Cochran, William D.; Henry, Gregory W.; Hatzes, Artie; Harrison, Tom E.; Johns-Krull, Chris; Nelan, Ed

    2014-01-01

    We have used high-cadence radial velocity measurements from the Hobby-Eberly Telescope with published velocities from the Lick 3 m Shane Telescope, combined with astrometric data from the Hubble Space Telescope (HST) Fine Guidance Sensors to refine the orbital parameters of the HD 128311 system, and determine an inclination of 55.°95 ± 14.°55 and true mass of 3.789 −0.432 +0.924 M JUP for HD 128311 c. The combined radial velocity data also reveal a short period signal which could indicate a third planet in the system with an Msin i of 0.133 ± 0.005 M JUP or stellar phenomena. Photometry from the T12 0.8 m automatic photometric telescope at the Fairborn Observatory and HST are used to determine a photometric period close to, but not within the errors of the radial velocity signal. We performed a cross-correlation bisector analysis of the radial velocity data to look for correlations with the photometric period and found none. Dynamical integrations of the proposed system show long-term stability with the new orbital parameters of over 10 million years. Our new orbital elements do not support the claims of HD 128311 b and c being in mean motion resonance.

  19. The Radial Distribution of Star Formation in Galaxies at z1 From The 3D-HST Survey

    Science.gov (United States)

    Nelson, Erica June; Dokkum, Pieter G. Van; Momcheva, Ivelina; Brammer, Gabriel; Lundgren, Britt; Skelton, Rosalind E.; Tease, Katherine Whitaker; Cunha, Elisabete Da; Schreiber, Natascha Forster; Franx, Marijn; hide

    2013-01-01

    The assembly of galaxies can be described by the distribution of their star formation as a function of cosmic time.Thanks to the WFC3 grism on the Hubble Space Telescope (HST) it is now possible to measure this beyond thelocal Universe. Here we present the spatial distribution of H emission for a sample of 54 strongly star-forming-galaxies at z1 in the 3D-HST Treasury survey. By stacking the Halpha emission, we find that star formation occurredin approximately exponential distributions at z1, with a median Sersic index of n=1.0 plus or minus 0.2. The stacks areelongated with median axis ratios of b/a 0.58 plus or minus 0.09 in Halpha consistent with (possibly thick) disks at randomorientation angles. Keck spectra obtained for a subset of eight of the galaxies show clear evidence for rotation, withinclination corrected velocities of 90-330 km per second. The most straightforward interpretation of our results is that starformation in strongly star-forming galaxies at z1 generally occurred in disks. The disks appear to be scaled-upversions of nearby spiral galaxies: they have EW(Halpha)100 Angstroms out to the solar orbit and they have star formation surface densities above the threshold for driving galactic scale winds.

  20. A 'Rosetta Stone' to Interpret the UV-HST Photometry of Multiple Stellar Populations in Globular Clusters

    Science.gov (United States)

    Renzini, Alvio

    2011-10-01

    In this proposal we intend to firmly identify the chemical species responsible for the UV and UV-optical color differences exhibited by the multiple stellar populations harboured by two Galactic globular clusters: omega Centauri and 47 Tucanae, one with highly helium enriched sub-populations {omega Centauri}, the other not.We plan to collect ultraviolet STIS spectra for stars in the crowded cores of the clusters, where HST photometry is already available for thousands of stars in more than 10 filters, from F225W to F850LP. This WFC3+ACS photometric database has allowed us to show that UV colors are remarkably effective in separating the different cluster sub-populations, and with the proposed STIS spectroscopy we can quantify the chemical abundance differences among such sub-populations, most notably in Nitrogen and Oxygen. The resulting calibration of the UV colors in terms of CNO abundances will provide a new effective tool for the chemical characterization of large numbers of globular cluster stars belonging to the various sub-populations in each cluster, and to better isolate the specific role of the helium abundance.The plan is to observe at least one star for each of the main principal stellar sub-populations in each of the two clusters. These objects are selected on the basis of their accurate photometry and astrometry already in hand, based on existing UV-HST images.

  1. PSPVDC: Una Propuesta que Incorpora el Diseño por Contrato Verificado al Personal Software Process

    Directory of Open Access Journals (Sweden)

    Silvana Moreno

    2013-10-01

    Full Text Available El desarrollo de software se ha vuelto una actividad muy importante en el mundo actual. Existen números procesos de desarrollo de software que buscan aumentar la calidad de los productos y disminuir los tiempos de salida al mercado. Sin embargo, el software contiene defectos y éstos causan fallas potencialmente graves durante su ejecución. Este trabajo propone un nuevo proceso de desarrollo de software denominado PSPVDC que combina el enfoque del Personal Software Process (PSP y del Diseño por Contrato Verificado (VDbC con el objetivo de mejorar la calidad de los productos con respecto al PSP. Además se presenta una revisión sistemática de la literatura que busca conocer las adaptaciones al PSP que hayan sido documentadas, en particular aquellas que incorporan métodos formales.

  2. Comunidades de software libre en Argentina: motivaciones, participación, militancia

    Directory of Open Access Journals (Sweden)

    Agustín Zanotti

    2014-12-01

    Full Text Available El artículo retoma indagaciones sobre comunidades de software libre en Argentina para analizar sus formas de participación y militancia. Nos enfocamos en las motivaciones que convocan a los miembros de comunidades y proyectos, las cuales se asocian a las potencialidades tanto técnicas como sociales del modelo libre de producción de software. El análisis nos lleva a comprender que las formas de solidaridad al interior de estos grupos se encuentran inescindiblemente unidas a una búsqueda personal y a necesidades cotidianas de sus participantes. Las comunidades generan y distribuyen capitales o recursos de manera retributiva, en función de sus contribuciones y aportes. Sobre la base de ciertas identidades geeks/hackers ligadas a estos entusiastas informáticos, tales espacios fortalecen vínculos, relaciones de pertenencia y experiencias compartidas. Junto con ello se van construyendo definiciones éticas y políticas en relación al software y los diferentes temas que hacen a la agenda local de los colectivos.El texto abre la discusión sobre las formas de militancia que existen detrás de estos colectivos y la construcción del software libre como un objeto político. Inscribimos de este modo el debate en una reflexión más amplia sobre la acción colectiva y los movimientos sociales contemporáneos.

  3. Contribuição dos modelos de qualidade e maturidade na melhoria dos processos de software Contribution of quality and maturity models to software process improvement

    Directory of Open Access Journals (Sweden)

    Antonio Carlos Tonini

    2008-01-01

    Full Text Available Grande parte das empresas desenvolvedoras de software criou seu próprio processo de trabalho. Devido à rápida expansão do mercado de software, a concorrência ocorre muito mais em custo do que em diferenciação. Para obter vantagem competitiva, as empresas devem atualizar-se continuamente na tecnologia, buscar a maturidade nos processos e eliminar a ineficiência operacional. Isso requer um envolvimento das pessoas, dos processos e da organização como um todo. O artigo discute a implementação de melhorias nos processos de software segundo os principais modelos de qualidade e de maturidade. Com base em um Estudo de Casos Múltiplos, verifica-se que a melhoria dos processos de software requer que a melhoria ocorra primeiramente entre cada um dos desenvolvedores e, a seguir, envolva os grupos de desenvolvimento e por fim, a organização como um todo. A pesquisa conclui que os modelos de qualidade e maturidade servem como orientadores do processo de melhoria.Many software development companies have developed their own work method. Due to the fast software market growth, the competition focuses more on cost than on differentiation. To achieve competitive advantage, software developer organizations must continually update their technology, reach high level process maturity and eliminate all the operational inefficiency. These procedures involve people, processes and the whole organization. The aim of the paper is to discuss software process improvement implementation according to the most important quality and maturity models. Based on a Multiple Case Study, it is verified that the software process improvement needs firstly individual improvement and, later, it involves the developer teams and the whole organization. The research concludes that the quality and maturity models must be used as improvement process drivers.

  4. The dynamics of software development project management: An integrative systems dynamic perspective

    Science.gov (United States)

    Vandervelde, W. E.; Abdel-Hamid, T.

    1984-01-01

    Rather than continuing to focus on software development projects per se, the system dynamics modeling approach outlined is extended to investigate a broader set of issues pertaining to the software development organization. Rather than trace the life cycle(s) of one or more software projects, the focus is on the operations of a software development department as a continuous stream of software products are developed, placed into operation, and maintained. A number of research questions are ""ripe'' for investigating including: (1) the efficacy of different organizational structures in different software development environments, (2) personnel turnover, (3) impact of management approaches such as management by objectives, and (4) the organizational/environmental determinants of productivity.

  5. Cost estimation in software engineering projects with web components development

    Directory of Open Access Journals (Sweden)

    Javier de Andrés

    2015-01-01

    Full Text Available Existen multitud de modelos propuestos para la predicción de co stes en proyectos de software, al gunos orientados específicamen te para proyectos Web. Este trabajo analiza si los modelos específicos para proyectos Web están justifi cados, examinando el comportami ento diferencial de los costes entre proyectos de desarrollo softwar e Web y no Web. Se analizan dos aspectos del cálculo de costes: las deseconomías de escala, y el im pacto de algunas características de estos proyectos que son utilizadas como cost drivers. Se en uncian dos hipótesis: (a en estos proyect os las deseconomías de escala so n mayores y (b el incremento de coste que provocan los cost dr ivers es menor para los proyectos Web. Se contrastaron estas hipótesis a nalizando un conjunto de proyectos reales. Los resultados sugie ren que ambas hipótesis se cumplen. Por lo tanto, la principal contribu ción a la literatura de esta inv estigación es que el desarrollo de modelos específicos para los proyectos Web está justificado.

  6. METODOLOGÍA PARA IMPLANTAR UN SISTEMA DE GESTIÓN DE LA CALIDAD EN UNA EMPRESA PRODUCTORA DE SOFTWARE

    Directory of Open Access Journals (Sweden)

    Mercedes Delgado Fernández

    2002-10-01

    Full Text Available

    A mediado de los 80, los procesos de desarrollo y mantenimiento del software eran con frecuencia imprevisibles y la garantía de funcionamiento y calidad del software desiguales. En general, los problemas principales presentados por los productos software: entrega tardía, costo elevado, imperfecciones, poco fiables, parecen en gran parte, debido a problemas de proceso. Es precisamente por esto que en las empresas del país se trabaja hoy en día en sistemas que ayuden a mejorar la productividad, la eficiencia y la calidad de los productos software. En este artículo se parte de un estudio de los principales conceptos de la gestión de la calidad y su aplicación en la producción de software, y se propone una metodología para diseñar un sistema de gestión de la calidad en las empresas productoras de software, basado en las normas ISO 9000, el modelo de madurez de las capacidades, y el modelo europeo de calidad total.

  7. Sistema de software de adquisición y procesado de EEG mediante MATLAB

    OpenAIRE

    Pérez‐Muelas Noguera, Alberto

    2017-01-01

    Extraer conocimiento de las señales de electroencefalograma (EEG) se ha convertido en un importante área de investigación de la ingeniería biomédica. A sus aplicaciones iniciales de diagnosis médica, hoy día, se le suman numerosos esfuerzos, para desarrollar aplicaciones que permitan a los usuarios controlar dispositivos externos, únicamente con su actividad cerebral. Este proyecto se plantea, para desarrollar un software de procesado en tiempo real de señales EEG, desarrollado...

  8. Metodologías para desarrollar software seguro

    Directory of Open Access Journals (Sweden)

    Carlos Joaquín Brito Abundis

    2013-12-01

    Full Text Available La seguridad ha pasado de ser un requerimiento no funcional, que podía implementarse como parte de la calidad del software a un elemento primordial de cualquier aplicación. Los hackers y grupos criminales evolucionan día a día y se han convertido expertos en explotar las vulnerabilidades de las aplicaciones y sitios en internet. Para hacer frente a estas amenazas, es necesaria la implementación de metodologías que contemplen en su proceso de desarrollo de software la eliminación de vulnerabilidades y la inclusión de la seguridad como un elemento básico en la arquitectura de cualquier producto de software. Este trabajo revisa algunas de las metodologías que contemplan la seguridad en su proceso.

  9. A Search for Lyα Emission from Galaxies AT 6 < z < 8 Using Deep HST Grism Observations: Discovery of a z = 7.5 Galaxy

    Science.gov (United States)

    Larson, Rebecca L.; Finkelstein, Steven; Pirzkal, Nor; Ryan, Russell; Tilvi, Vithal; Malhotra, Sangeeta; Rhoads, James; Finkelstein, Keely; Jung, Intae; Christensen, Lise; Cimatti, Andrea; Ferreras, Ignacio; Grogin, Norman; Koekemoer, Anton; Hathi, Nimish; O'Connell, Robert; Östlin, Göran; Pasquali, Anna; Rothberg, Barry; Windhorst, Rogier; FIGS Team

    2018-01-01

    We have built an automated detection method to find Lyα emission lines in HST grism data from 6 state of the intergalactic medium (IGM) during the epoch of reionization. We use 160 orbits of G102 slitless spectroscopy obtained from HST/WFC3 for the Faint Infrared Grism Survey (FIGS; PI: Malhotra) that were optimized to sample previously-identified high-redshift galaxy candidates. This dataset has already been used to identify one of these candidates, at redshift z = 7.51, which has been observed to have Lyα emission detectable with the HST Grism (Finkelstein et al. 2013; Tilvi et al. 2016). The FIGS data use five separate roll-angles of HST in an effort to mitigate the overall contamination effects of nearby galaxies and we have created a method that accounts for and removes the contamination from surrounding galaxies, while also removing any dispersed continuum light from each individual spectrum (Pirzkal et al. 2017). Using our new automated process we searched for significant (> 3σ) emission lines via two different methods. First, we compared the results for each galaxy across all roll angles and identified significant lines detected in more than one roll angle. Second, we performed a fit to all five roll angles simultaneously, accounting for the total flux of the emission line across all of our spectra. We have examined the spectra for 64 z > 7 candidates in our sample and found one new candidate Lyα emission line at a (> 5σ) level at 1.03µm (FIGS ID: GS2 1406 also named CANDELS ID: z7 PAR2 2909). After comparing this emission line with the broadband photometric colors, we conclude that this line is Lyα at z = 7.542 ± 0.003. This galaxy has the highest Lyα rest-frame equivalent width (EWLyα) yet published at z > 7 (110 ± 14 A).

  10. La elicitación de requisitos en el contexto de un proyecto software

    Directory of Open Access Journals (Sweden)

    Markus Manies, Uolevis Nikual

    2011-12-01

    Full Text Available La Elicitación de Requisitos –ER– es la piedra angular en el desarrollo de proyectos software y tiene un impacto muy alto en el diseño y en las demás fases del ciclo de vida del producto. Si se realiza apropiadamente, puede ayudar a reducir los cambios y las correcciones en los requisitos. Además, la calidad de la elicitación determina la exactitud de la retroalimentación al cliente acerca de la integridad y validez de los requisitos. Debido a que esta fase es crítica y de alto impacto en el proyecto, es muy importante que la labor de elicitar se realice lo más cercano posible a la “perfección”. Teniendo en cuenta las diferentes características de los proyectos software, en este trabajo se proponen algunas reglas generales para llevar a cabo la RE con base en la discusión y en la explicación de los procesos relacionados y métodos aplicados en los diferentes tipos de proyectos software.

  11. The MACHO Project HST Follow-Up: The Large Magellanic Cloud Microlensing Source Stars

    Energy Technology Data Exchange (ETDEWEB)

    Nelson, C.A.; /LLNL, Livermore /UC, Berkeley; Drake, A.J.; /Caltech; Cook, K.H.; /LLNL, Livermore /UC, Berkeley; Bennett, D.P.; /Caltech /Notre Dame U.; Popowski, P.; /Garching, Max Planck Inst.; Dalal, N.; /Toronto U.; Nikolaev, S.; /LLNL, Livermore; Alcock, C.; /Caltech /Harvard-Smithsonian Ctr. Astrophys.; Axelrod, T.S.; /Arizona U.; Becker, A.C. /Washington U., Seattle; Freeman, K.C.; /Res. Sch. Astron. Astrophys., Weston Creek; Geha, M.; /Yale U.; Griest, K.; /UC, San Diego; Keller, S.C.; /LLNL, Livermore; Lehner, M.J.; /Harvard-Smithsonian Ctr. Astrophys. /Taipei, Inst. Astron. Astrophys.; Marshall, S.L.; /SLAC; Minniti, D.; /Rio de Janeiro, Pont. U. Catol. /Vatican Astron. Observ.; Pratt, M.R.; /Aradigm, Hayward; Quinn, P.J.; /Western Australia U.; Stubbs, C.W.; /UC, Berkeley /Harvard U.; Sutherland, W.; /Oxford U. /Oran, Sci. Tech. U. /Garching, Max Planck Inst. /McMaster U.

    2009-06-25

    We present Hubble Space Telescope (HST) WFPC2 photometry of 13 microlensed source stars from the 5.7 year Large Magellanic Cloud (LMC) survey conducted by the MACHO Project. The microlensing source stars are identified by deriving accurate centroids in the ground-based MACHO images using difference image analysis (DIA) and then transforming the DIA coordinates to the HST frame. None of these sources is coincident with a background galaxy, which rules out the possibility that the MACHO LMC microlensing sample is contaminated with misidentified supernovae or AGN in galaxies behind the LMC. This supports the conclusion that the MACHO LMC microlensing sample has only a small amount of contamination due to non-microlensing forms of variability. We compare the WFPC2 source star magnitudes with the lensed flux predictions derived from microlensing fits to the light curve data. In most cases the source star brightness is accurately predicted. Finally, we develop a statistic which constrains the location of the Large Magellanic Cloud (LMC) microlensing source stars with respect to the distributions of stars and dust in the LMC and compare this to the predictions of various models of LMC microlensing. This test excludes at {approx}> 90% confidence level models where more than 80% of the source stars lie behind the LMC. Exotic models that attempt to explain the excess LMC microlensing optical depth seen by MACHO with a population of background sources are disfavored or excluded by this test. Models in which most of the lenses reside in a halo or spheroid distribution associated with either the Milky Way or the LMC are consistent which these data, but LMC halo or spheroid models are favored by the combined MACHO and EROS microlensing results.

  12. Modelo Neuronal de Estimación para el Esfuerzo de Desarrollo en Proyectos de Software (MONEPS

    Directory of Open Access Journals (Sweden)

    Mario G. Almache C, Geovanny Raura , Jenny A. Ruiz R., Efraín R. Fonseca C

    2015-07-01

    Full Text Available —La estimación temprana del esfuerzo para la construcción de un producto software, es crucial en la previsión del costo y tiempo necesarios para su desarrollo. Los modelos y técnicas para la estimación del esfuerzo presentan como principal inconveniente, la poca precisión en las predicciones realizadas y generalmente se hace una mínima consideración de los aspectos no funcionales del software. Se propone la construcción de un modelo de estimación para el esfuerzo en el desarrollo de software denominado MONEPS, que pretende mejorar la precisión en la estimación del esfuerzo, utilizando una Red Neuronal Artificial (RNA en Backpropagation, cuya capa de entrada se estructura sobre la base de un conjunto de características y atributos tomados de la norma ISO/IEC 25000 de la calidad del software. La RNA fue entrenada con datos recopilados de aplicaciones desarrolladas en el ámbito académico, de las cuales se conocían sus tiempos de desarrollo y costos asociados. Las estimaciones de tiempo y costo, para dos casos de prueba, muestran más precisión en el modelo neuronal, en comparación con los modelos Cocomo-81 y Cocomo-II. MONEPS ha logrado la convergencia de aspectos funcionales y no funcionales para mejorar la precisión en la estimación del esfuerzo en proyectos de software

  13. ENTORNO COLABORATIVO DE APOYO A LA MEJORA DE PROCESOS DE SOFTWARE EN PEQUEÑAS ORGANIZACIONES DE SOFTWARE

    Directory of Open Access Journals (Sweden)

    W. LIBARDO PANTOJA

    2013-01-01

    Full Text Available La Ingeniería de Software reconoce que una buena estrategia para aumentar la calidad de sus productos es por medio de la mejora de los procesos. Un factor que puede ayudar a las organizaciones a dirigir con éxito un proyecto de mejora es disponer de un soporte tecnológico por medio de herramientas groupware que ayuden a gestionar los proyectos de mejora de procesos. En este artículo se plantea un modelo de colaboración y una herramienta, orientados a fomentar la comunicación y coordinación entre los integrantes de un equipo de mejora, como apoyo a la implantación de proyectos SPI (Software Process Improvement en pequeñas organizaciones de software. El trabajo ha sido validado de manera preliminar utilizando la técnica focus group mostrando algunos resultados interesantes al ser evaluada con expertos en SPI.

  14. Towards Multi-Method Research Approach in Empirical Software Engineering

    Science.gov (United States)

    Mandić, Vladimir; Markkula, Jouni; Oivo, Markku

    This paper presents results of a literature analysis on Empirical Research Approaches in Software Engineering (SE). The analysis explores reasons why traditional methods, such as statistical hypothesis testing and experiment replication are weakly utilized in the field of SE. It appears that basic assumptions and preconditions of the traditional methods are contradicting the actual situation in the SE. Furthermore, we have identified main issues that should be considered by the researcher when selecting the research approach. In virtue of reasons for weak utilization of traditional methods we propose stronger use of Multi-Method approach with Pragmatism as the philosophical standpoint.

  15. Análisis de Flujos de Conocimiento en Proyectos de Mejora de Procesos Software bajo una perspectiva multi-enfoque

    Directory of Open Access Journals (Sweden)

    Brenda L. Flores-Rios

    2014-12-01

    Full Text Available La Gestión de conocimiento (GC tiene el potencial de proveer diversos beneficios a las organizaciones dedicadas al desarrollo de software. Entre ellos la gestión de activos de conocimiento, el aumento de la productividad o el incremento de la capacidad de sus procesos software. Sin embargo, debido al crecimiento y evolución que ha tenido la industria de software, se requieren nuevos paradigmas asociados a la generación y reutilización de diversos tipos y flujos de conocimiento con el propósito de promover procesos de innovación centrados en la Mejora de procesos software (SPI. En este artículo se presenta un análisis de tres enfoques de flujos de conocimiento, con el cual se ofrece una estrategia para apoyar la creación, transferencia y evolución del conocimiento involucrado en un proyecto SPI. Además, se define un marco de trabajo para la identificación de flujos de conocimiento relacionados con elementos de un modelo de referencia de procesos.

  16. Diseño del modelo integral colaborativo para el desarrollo ágil de software en las empresas de la zona centro-occidente en México

    Directory of Open Access Journals (Sweden)

    José Luis Cendejas Valdéz

    2014-01-01

    Full Text Available El principal problema en el desarrollo de software es generar aplicaciones que no acaban satisfaciendo las necesidades y objetivos de las organizaciones (clientes. El desarrollo de software en la actualidad no impacta directamente a los objetivos y metas que tienen planeadas las organizaciones, es decir el software se desarrolla por expertos de tecnologías de la información (TI que se dedican a realizar los procesos de análisis, diseño y desarrollo para la creación de nuevas herramientas tecnológicas (software. Sin embargo, no se hacen acompañar por expertos de los procesos de la organización que contribuyan al óptimo funcionamiento del software. Dichos desarrollos deben de estar respaldados y basarse en algún modelo o metodología que ayude a generar software de calidad, en donde el grupo multidisciplinario que interviene en el desarrollo del software no acabe trabajando para la metodología elegida, sino la metodología para el proyecto. De ahí la necesidad de generar modelos que ayuden a las pequeñas y medianas empresas de México al desarrollo pertinente de software a la medida. Este estudio propone un modelo para el desarrollo ágil de software, el cual se basa en la percepción de expertos en esta área. El modelo que se propone a continuación se denomina “Modelo de desarrollo de software integral colaborativo” (MDSIC y ofrece a los expertos una manera sencilla de interactuar con él a través de cinco niveles que brindan las mejores prácticas en el desarrollo de software; además dichos niveles consideran las funciones principales que propone el Project Management Institute (PMI, lo que permite generar software de calidad alineado con los objetivos de la organización (planeación estratégica. El MDSIC evalúa la calidad del software a través de una serie de indicadores que se deben de contemplar para el óptimo funcionamiento de un software, estos indicadores están fundamentados por estándares de calidad en el

  17. Medición y estimación del software: métodos y herramientas para mejorar la calidad del software

    OpenAIRE

    Dapozo, Gladys N.; Greiner, Cristina L.; Ferraro, María de los Angeles; Medina, Yanina; Pedrozo Petrazzini, Gabriel; Lencina, Berenice

    2014-01-01

    El desarrollo de software requiere de la estimación para controlar y administrar los recursos que se necesitan utilizar antes y durante el proyecto. La estimación no es una ciencia exacta dado que existen numerosas variables humanas, técnicas, del entorno y políticas, que intervienen en su proceso y que pueden afectar los resultados finales. Sin embargo, cuando es llevada a cabo en forma sistemática, se pueden lograr resultados con un grado aceptable y convertirla en un instrumento útil para ...

  18. The HST/ACS Coma Cluster Survey. II. Data Description and Source Catalogs

    Science.gov (United States)

    Hammer, Derek; Kleijn, Gijs Verdoes; Hoyos, Carlos; Den Brok, Mark; Balcells, Marc; Ferguson, Henry C.; Goudfrooij, Paul; Carter, David; Guzman, Rafael; Peletier, Reynier F.; hide

    2010-01-01

    The Coma cluster, Abell 1656, was the target of a HST-ACS Treasury program designed for deep imaging in the F475W and F814W passbands. Although our survey was interrupted by the ACS instrument failure in early 2007, the partially-completed survey still covers approximately 50% of the core high density region in Coma. Observations were performed for twenty-five fields with a total coverage area of 274 aremin(sup 2), and extend over a wide range of cluster-centric radii (approximately 1.75 Mpe or 1 deg). The majority of the fields are located near the core region of Coma (19/25 pointings) with six additional fields in the south-west region of the cluster. In this paper we present SEXTRACTOR source catalogs generated from the processed images, including a detailed description of the methodology used for object detection and photometry, the subtraction of bright galaxies to measure faint underlying objects, and the use of simulations to assess the photometric accuracy and completeness of our catalogs. We also use simulations to perform aperture corrections for the SEXTRACTOR Kron magnitudes based only on the measured source flux and its half-light radius. We have performed photometry for 76,000 objects that consist of roughly equal numbers of extended galaxies and unresolved objects. Approximately two-thirds of all detections are brighter than F814W=26.5 mag (AB), which corresponds to the 10sigma, point-source detection limit. We estimate that Coma members are 5-10% of the source detections, including a large population of compact objects (primarily GCs, but also cEs and UCDs), and a wide variety of extended galaxies from cD galaxies to dwarf low surface brightness galaxies. The initial data release for the HST-ACS Coma Treasury program was made available to the public in August 2008. The images and catalogs described in this study relate to our second data release.

  19. The bipolar jet of the symbiotic star R Aquarii: A study of its morphology using the high-resolution HST WFC3/UVIS camera

    Science.gov (United States)

    Melnikov, Stanislav; Stute, Matthias; Eislöffel, Jochen

    2018-04-01

    Context. R Aqr is a symbiotic binary system consisting of a Mira variable with a pulsation period of 387 days and a hot companion which is presumably a white dwarf with an accretion disk. This binary system is the source of a prominent bipolar gaseous outflow. Aims: We use high spatial resolution and sensitive images from the Hubble Space Telescope (HST) to identify and investigate the different structural components that form the complex morphology of the R Aqr jet. Methods: We present new high-resolution HST WFC3/UVIS narrow-band images of the R Aqr jet obtained in 2013/14 using the [OIII]λ5007, [OI]λ6300, [NII]λ6583, and Hα emission lines. These images also allow us to produce detailed maps of the jet flow in several line ratios such as [OIII]λ5007/[OI]λ6300 and [NII]λ6583/[OI]λ6300 which are sensitive to the outflow temperature and its hydrogen ionisation fraction. The new emission maps together with archival HST data are used to derive and analyse the proper motion of prominent emitting features which can be traced over 20 years with the HST observations. Results: The images reveal the fine gas structure of the jet out to distances of a few tens of arcseconds from the central region, as well as in the innermost region, within a few arcseconds around the stellar source. They reveal for the first time the straight, highly collimated jet component which can be traced to up to 900 AU in the NE direction. Images in [OIII]λ5007, [OI]λ6300, and [NII]λ6583 clearly show a helical pattern in the jet beams which may derive from the small-scale precession of the jet. The highly collimated jet is accompanied by a wide opening angle outflow which is filled by low excitation gas. The position angles of the jet structures as well as their opening angles are calculated. Our measurements of the proper motions of some prominent emission knots confirm the scenario of gas acceleration during the propagation of the outflow. Finally, we produce several detailed line ratio

  20. Modelo de Proceso Software Aplicado a la Revisión de la Accesibilidad WEB en Desarrollos Basados en IDE

    Directory of Open Access Journals (Sweden)

    Pedro A. Duarte

    2015-10-01

    Full Text Available Se describe un modelo de proceso software incremental que incluye como aspecto relevante la Accesibilidad Web. Considerada ésta como un atributo de la calidad del software y un Requerimiento No funcional. Se expone el método propuesto, su validación en una solución tecnológica concreta y los resultados logrados. Para finalizar se esbozan algunas consideraciones a contemplar en el uso de los entornos de desarrollo integrado y la Accesibilidad Web.

  1. El proceso de requisitos en el desarrollo de open source software

    OpenAIRE

    Muruzábal Ishigetani, Olympia

    2014-01-01

    El propósito de este trabajo es determinar si las actividades que se llevan a cabo en el proceso de requisitos en comunidades OSS, a diferencia del proceso de requisitos de la Ingeniería del Software tradicional, es una de las claves del éxito del software de código abierto. El proceso de requisitos forma parte de la etapa inicial de un proyecto y es imprescindible puesto que define las funcionalidades del software a desarrollar y da soporte a la adaptación y evolución del proy...

  2. RNA-SeQC: RNA-seq metrics for quality control and process optimization.

    Science.gov (United States)

    DeLuca, David S; Levin, Joshua Z; Sivachenko, Andrey; Fennell, Timothy; Nazaire, Marc-Danie; Williams, Chris; Reich, Michael; Winckler, Wendy; Getz, Gad

    2012-06-01

    RNA-seq, the application of next-generation sequencing to RNA, provides transcriptome-wide characterization of cellular activity. Assessment of sequencing performance and library quality is critical to the interpretation of RNA-seq data, yet few tools exist to address this issue. We introduce RNA-SeQC, a program which provides key measures of data quality. These metrics include yield, alignment and duplication rates; GC bias, rRNA content, regions of alignment (exon, intron and intragenic), continuity of coverage, 3'/5' bias and count of detectable transcripts, among others. The software provides multi-sample evaluation of library construction protocols, input materials and other experimental parameters. The modularity of the software enables pipeline integration and the routine monitoring of key measures of data quality such as the number of alignable reads, duplication rates and rRNA contamination. RNA-SeQC allows investigators to make informed decisions about sample inclusion in downstream analysis. In summary, RNA-SeQC provides quality control measures critical to experiment design, process optimization and downstream computational analysis. See www.genepattern.org to run online, or www.broadinstitute.org/rna-seqc/ for a command line tool.

  3. Protótipo de um software para registro de enfermagem em unidade de terapia intensiva neonatal

    Directory of Open Access Journals (Sweden)

    Luciana de Medeiros Lima

    2015-01-01

    Full Text Available Introducción: el creciente volumen de informaciones originadas de los registros de enfermería exige estrategias de tratamiento del conocimiento producido, de forma que se eviten las desventajas del histórico de papel. Objetivo: se plantea en este estudio desarro - llar un software aplicado a la sistematización de la asistencia de enfermería que les brinde a los enfermeros el registro informatizado, eficiente y rápido. Metodología: se trata de un estudio metodológico con producción tecnológica, dividido en tres fases: construcción de las afirmativas de diagnósticos e intervenciones de enfermería, validación de las afirmativas y desarrollo del software. El sistema se desarrolló sobre la plataforma Java, con utilización de framework JSF, incorporado a la especificación J2EE, para desarrollar aplicaciones web de forma ágil. Resultados: el banco de datos se compone de 143 afirmativas de diagnósticos de enfermería y 130 referentes a las intervenciones de enfermería. El software desarrollado presenta 17 pantallas que incluyen datos de identificación, examen físico completo del recién nacido, organizado de acuerdo con las necesidades humanas básicas, listado de diagnósticos e intervenciones de enfermería sugeridas por el programa y hoja final para impresión. Consideraciones finales: el software proporciona la ejecución del proceso de enfermería con un registro completo, uniforme y rápido, y se constituye una importante fuente de datos para investigación.

  4. Calidad total en un modelo integrado de proceso software y ciclo de vida

    OpenAIRE

    Mon, Alicia; Garzás, Javier

    2009-01-01

    La modelización del Proceso Software constituye un marco de referencia para la organización de las actividades que involucran todas las etapas del desarrollo. La representación del ciclo de vida define los estados por los que pasa un producto software y la representación del proceso software define el conjunto de actividades esenciales no ordenadas en el tiempo que requiere el desarrollo de software. En el presente artículo se exponen los avances de una investigación que propone una modeli...

  5. Central Star Properties and C-N-O Abundances in Eight Galactic Planetary Nebulae from New HST/STIS Observations

    Science.gov (United States)

    Henry, Richard B. C.; Balick, Bruce; Dufour, Reginald J.; Kwitter, Karen B.; Shaw, Richard A.; Corradi, Romano

    2015-01-01

    We present detailed photoionization models of eight Galactic planetary nebulae (IC2165, IC3568, NGC2440, NGC3242, NGC5315, NGC5882, NGC7662, & PB6) based on recently obtained HST STIS spectra. Our interim goal is to infer Teff, luminosity, and current and progenitor masses for each central star, while the ultimate goal is to constrain published stellar evolution models which predict nebular CNO abundances. The models were produced by using the code CLOUDY to match closely the measured line strengths derived from high-quality HST STIS spectra (see poster by Dufour et al., this session) extending in wavelength from 1150-10270 Angstroms. The models assumed a blackbody SED. Variable input parameters included Teff, a radially constant nebular density, a filling factor, and elemental abundances. For the eight PNs we found a birth mass range of 1.5-2.9 Msun, a range in log(L/Lsun) of 3.10-3.88, and a Teff range of 51-150k K. Finally, we compare CNO abundances of the eight successful models with PN abundances of these same elements that are predicted by published stellar evolution models. We gratefully acknowledge generous support from NASA through grants related to the Cycle 19 program GO12600.

  6. Selección de estrategias para la implementación de Mejoras de Procesos Software

    Directory of Open Access Journals (Sweden)

    Brenda Liliana Durón del Villar

    2013-12-01

    Full Text Available La mejora de procesos software se ha convertido en la forma más lógica y obvia de dirigir la creciente necesidad de aumentar la competitividad en las empresas de desarrollo de software. Desafortunadamente no todas las implementaciones de mejoras en los procesos tienen el rendimiento deseado, debido a que los modelos y estándares existentes centran su atención en qué actividades implementar sin abordar el cómo implementarlas. Sin embargo, la identificación de qué actividades implementar no es suficiente y el conocimiento del cómo implementarlas es requerido para el éxito de la implementación de iniciativas de Mejoras de Procesos Software (MPS en las empresas de desarrollo de software. En este trabajo se presenta los resultados tanto de una revisión del estado actual en la implementación de MPS lograda mediante una revisión literaria así como los resultados de un análisis de empresas locales de Zacatecas logrado mediante la aplicación de entrevistas. Finalmente, se presenta una propuesta para el establecimiento de estrategias para la implementación de MPS basadas en los aspectos contextuales en los cual el software es desarrollado y entregado, tal que, pueda ser seleccionada una estrategia acorde a las necesidades y cultura de trabajo de la organización.

  7. EVALUACIÓN HEURÍSTICA DE LA USABILIDAD DE SOFTWARE PARA FACILITAR EL USO DEL COMPUTADOR A PERSONAS EN SITUACIÓN DE DISCAPACIDAD MOTRIZ

    Directory of Open Access Journals (Sweden)

    Jhon Fernando Sánchez-Álvarez

    Full Text Available Existen enfermedades que dificultan el uso de herramientas computacionales de manera eficiente. Por esto, algunas entidades y centros de investigación desarrollan aplicaciones de software para facilitar el acceso al uso de los computadores a las personas que padecen alguna enfermedad que altera de manera significativa su motricidad. Para garantizar que el producto de software cumpla las funciones para las que se diseñó se le realizaron algunas pruebas. Una de ellas fue la evaluación de usabilidad del software que, a menudo, se realiza de forma empírica. En este artículo se propone un método con enfoque heurístico para evaluar la usabilidad de software diseñado para facilitar el acceso a la computación a personas con discapacidad motriz. A menudo, en temas de usabilidad, un desarrollador que no conoce las necesidades específicas de las personas aborda erróneamente los lineamientos en el diseño del software. Esta investigación toma importancia debido a que los usuarios con patologías asignan pesos a características del software que los expertos en usabilidad consideran importantes.

  8. Diseño e implementación de un software educativo en Cálculo Numérico

    Directory of Open Access Journals (Sweden)

    Pizarro, Rubén A.

    2009-01-01

    Full Text Available En este trabajo presentamos las características de un software educativo que hemos desarrollado con MATLAB. Hemos diseñado este software para implementar los diferentes métodos de resolución de ecuaciones no lineales que se estudian en Cálculo Numérico. Esta materia corresponde al Profesorado en Matemática, Licenciatura en Física e Ingeniería Civil, carreras que se siguen en la Facultad de Ciencias Exactas y Naturales de la Universidad Nacional de La Pampa. Además, detallamos las motivaciones que nos llevaron a su diseño e implementación, como así también las modificaciones que se introdujeron tanto en las clases prácticas como teóricas. Estas modificaciones se fueron produciendo a partir del uso de este software y del análisis a-posteriori de la información obtenida por medio de encuestas a alumnos, y de la observación de clases. Finalmente, luego de utilizar este software durante tres años (versiones anteriores y a partir de los resultados alcanzados, realizamos un análisis sobre las mejoras / correcciones necesarias para elaborar una versión final del mismo.

  9. THE DISTANCE TO THE MASSIVE GALACTIC CLUSTER WESTERLUND 2 FROM A SPECTROSCOPIC AND HST PHOTOMETRIC STUDY

    International Nuclear Information System (INIS)

    Vargas Álvarez, Carlos A.; Kobulnicky, Henry A.; Bradley, David R.; Kannappan, Sheila J.; Norris, Mark A.; Cool, Richard J.; Miller, Brendan P.

    2013-01-01

    We present a spectroscopic and photometric determination of the distance to the young Galactic open cluster Westerlund 2 using WFPC2 imaging from the Hubble Space Telescope (HST) and ground-based optical spectroscopy. HST imaging in the F336W, F439W, F555W, and F814W filters resolved many sources previously undetected in ground-based observations and yielded photometry for 1136 stars. We identified 15 new O-type stars, along with two probable binary systems, including MSP 188 (O3 + O5.5). We fit reddened spectral energy distributions based on the Padova isochrones to the photometric data to determine individual reddening parameters R V and A V for O-type stars in Wd2. We find average values (R V ) = 3.77 ± 0.09 and (A V ) = 6.51 ± 0.38 mag, which result in a smaller distance than most other spectroscopic and photometric studies. After a statistical distance correction accounting for close unresolved binaries (factor of 1.08), our spectroscopic and photometric data on 29 O-type stars yield that Westerlund 2 has a distance (d) = 4.16 ± 0.07 (random) +0.26 (systematic) kpc. The cluster's age remains poorly constrained, with an upper limit of 3 Myr. Finally, we report evidence of a faint mid-IR polycyclic aromatic hydrocarbon ring surrounding the well-known binary candidate MSP 18, which appears to lie at the center of a secondary stellar grouping within Westerlund 2.

  10. THE DISTANCE TO THE MASSIVE GALACTIC CLUSTER WESTERLUND 2 FROM A SPECTROSCOPIC AND HST PHOTOMETRIC STUDY

    Energy Technology Data Exchange (ETDEWEB)

    Vargas Alvarez, Carlos A.; Kobulnicky, Henry A. [Department of Physics and Astronomy, University of Wyoming, Dept. 3905, Laramie, WY 82071 (United States); Bradley, David R.; Kannappan, Sheila J.; Norris, Mark A. [Department of Physics and Astronomy, University of North Carolina, Chapel Hill, CB 3255, Phillips Hall, Chapel Hill, NC 27599-3255 (United States); Cool, Richard J. [Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, CA 91101 (United States); Miller, Brendan P., E-mail: cvargasa@uwyo.edu, E-mail: chipk@uwyo.edu, E-mail: davidbradley512@gmail.com, E-mail: sheila@physics.unc.edu, E-mail: manorris@physics.unc.edu, E-mail: rcool@obs.carnegiescience.edu, E-mail: mbrendan@umich.edu [Department of Astronomy, University of Michigan, 745 Dennison Building, 500 Church St., Ann Arbor, MI 48109 (United States)

    2013-05-15

    We present a spectroscopic and photometric determination of the distance to the young Galactic open cluster Westerlund 2 using WFPC2 imaging from the Hubble Space Telescope (HST) and ground-based optical spectroscopy. HST imaging in the F336W, F439W, F555W, and F814W filters resolved many sources previously undetected in ground-based observations and yielded photometry for 1136 stars. We identified 15 new O-type stars, along with two probable binary systems, including MSP 188 (O3 + O5.5). We fit reddened spectral energy distributions based on the Padova isochrones to the photometric data to determine individual reddening parameters R{sub V} and A{sub V} for O-type stars in Wd2. We find average values (R{sub V} ) = 3.77 {+-} 0.09 and (A{sub V} ) = 6.51 {+-} 0.38 mag, which result in a smaller distance than most other spectroscopic and photometric studies. After a statistical distance correction accounting for close unresolved binaries (factor of 1.08), our spectroscopic and photometric data on 29 O-type stars yield that Westerlund 2 has a distance (d) = 4.16 {+-} 0.07 (random) +0.26 (systematic) kpc. The cluster's age remains poorly constrained, with an upper limit of 3 Myr. Finally, we report evidence of a faint mid-IR polycyclic aromatic hydrocarbon ring surrounding the well-known binary candidate MSP 18, which appears to lie at the center of a secondary stellar grouping within Westerlund 2.

  11. The Radial Distribution of Star Formation in Galaxies at z ~ 1 from the 3D-HST Survey

    Science.gov (United States)

    Nelson, Erica June; van Dokkum, Pieter G.; Momcheva, Ivelina; Brammer, Gabriel; Lundgren, Britt; Skelton, Rosalind E.; Whitaker, Katherine E.; Da Cunha, Elisabete; Förster Schreiber, Natascha; Franx, Marijn; Fumagalli, Mattia; Kriek, Mariska; Labbe, Ivo; Leja, Joel; Patel, Shannon; Rix, Hans-Walter; Schmidt, Kasper B.; van der Wel, Arjen; Wuyts, Stijn

    2013-01-01

    The assembly of galaxies can be described by the distribution of their star formation as a function of cosmic time. Thanks to the WFC3 grism on the Hubble Space Telescope (HST) it is now possible to measure this beyond the local Universe. Here we present the spatial distribution of Hα emission for a sample of 54 strongly star-forming galaxies at z ~ 1 in the 3D-HST Treasury survey. By stacking the Hα emission, we find that star formation occurred in approximately exponential distributions at z ~ 1, with a median Sérsic index of n = 1.0 ± 0.2. The stacks are elongated with median axis ratios of b/a = 0.58 ± 0.09 in Hα consistent with (possibly thick) disks at random orientation angles. Keck spectra obtained for a subset of eight of the galaxies show clear evidence for rotation, with inclination corrected velocities of 90-330 km s-1. The most straightforward interpretation of our results is that star formation in strongly star-forming galaxies at z ~ 1 generally occurred in disks. The disks appear to be "scaled-up" versions of nearby spiral galaxies: they have EW(Hα) ~ 100 Å out to the solar orbit and they have star formation surface densities above the threshold for driving galactic scale winds.

  12. SIAPEM - Brazilian Software Database for Multiple Sclerosis ...

    African Journals Online (AJOL)

    Resultados: Se utiliza con el programa ACCESS 2000, y es un banco de datos de software que permite obtener resultados en forma inmediata de los datos entrados, no importando el número de pacientes existente, con un diseño simple y práctico. Conclusiones: Es un proceso que ahorra tiempo y permite mantener una ...

  13. Uma proposta metodológica para a mensuração das atividades de software realizadas fora da indústria de software

    Directory of Open Access Journals (Sweden)

    Antonio Carlos Diegues

    2011-11-01

    Full Text Available O objetivo deste trabalho é propor uma metodologia que seja capaz de mensurar a dimensão secundária das atividades de software e serviços relacionados. O conceito de dimensão secundária utilizado neste trabalho engloba as atividades de desenvolvimento, produção, comercialização e manutenção de software e serviços relacionados que não são realizados por empresas pertencentes ao setor de software. Como resultado da aplicação desta metodologia, mostrou-se que as atividades de software e serviços relacionados, no Brasil, apresentaram uma receita operacional líquida de cerca de R$ 61,12 bilhões, em 2005, dos quais R$ 30,48 bilhões foram gerados na dimensão primária e R$ 30,64 bilhões na secundária. Tal metodologia também permitiu comprovar que grande parte da dimensão secundária concentra-se em empresas de grande porte (principalmente naquelas com 1.000 ou mais empregados e nos setores de administração pública (23,9% do total, serviços prestados às empresas (17%, comércio varejista (11,1%, correio e telecomunicações (7,3%, intermediação financeira (4,7% e comércio atacadista (3,4%.This paper aims to propose a methodology that measures the secondary dimension of software and related services activities. The concept of secondary dimension used in this paper refers to the activities of software and related services performed outside the software industry, ie, the activities of development, production, marketing and support of software and related services that are not made by companies classified as belonging to the sector of software. As a result of this methodology, the paper shows that the activities of software and related services in Brazil in 2005 presented a net operating revenue of approximately R$ 61.12 billion, of which R$ 30.48 billion were generated in the primary dimension and R$ 30.64 billion in the secondary dimension. It also showed that the secondary dimension mostly relies in largesized

  14. Propuesta metodológica para desarrollo de software educativo en la Universidad de Holguín

    Directory of Open Access Journals (Sweden)

    Carlos Jesús Madariaga-Fernández

    2016-01-01

    Full Text Available Para el uso eficiente de las tecnologías de la informática y las comunicaciones en el proceso enseñanza aprendizaje, en la Universidad de Holguín, se requiere entre otros elementos una meto dología de desarrollo de software educativos. Basados en esa necesidad se ha conducido una investigación que ha analizado las teorías del aprendizaje contemporáneo, las características de los procesos de desarrollo de software, los modelos tradicionales de desarrollo de software, las metodologías ágiles y propone una metodología de desarrollo de software educativo adaptada a las características y necesidades de la docencia en la Universidad de Holguín. Dicha propuesta describe un conjunto de fases que permi ten guiar el proceso de desarrollo de productos de software que apoyen el proceso de enseñanza aprendizaje.

  15. DIRECTRICES PARA LA CONSTRUCCIÓN DE ARTEFACTOS DE PERSISTENCIA EN EL PROCESO DE DESARROLLO DE SOFTWARE

    Directory of Open Access Journals (Sweden)

    Juan Bernardo Quintero

    2008-07-01

    Full Text Available El almacenamiento de datos es uno de los procesos que se halla en casi la totalidad de los sistemas de información. El tratamiento que se les da a las bases de datos durante el desarrollo de software resulta un factor determinante para el buen desempeño de un sistema. La acelerada evolución tecnológica y el desarrollo de la industria del software han conducido al surgimiento de diversas estrategias de modelado y numerosas técnicas de acceso a datos. En este trabajo se precisan los referentes conceptuales y prácticos para la construcción de los productos relacionados con las bases de datos, el acceso a estas y el tratamiento que se les da en la industria a los llamados artefactos de persistencia.Data storage is a process required in almost every information system nowadays; the treatment given to databases during the software development can be a determining factor in order to achieve good performance of a resulting system. The accelerated technological evolution and the progress of the software enterprises have given rise to diverse modeling strategies and several data access techniques. This work explains the practical and conceptual references for the construction of products related to databases, the access techniques to them and the handling that so-called persistence artifacts have at an industrial level.

  16. SOFTWARE REUSING AND ITS IMPACT ON THE SYSTEM'S COST

    OpenAIRE

    Lorena Lazo, Paul; Ruiz Lizama, Edgar

    2014-01-01

    This article presents two programs in C# that use an SQL server 2002 data access component, which is modified to be used with a 9i data base, with the purpose of evaluating a developer's productivity, making the comparative analysis of two stages: a system developed reusing software, and another one without software reusing. El artículo presenta dos programas en C# que utilizan un componente de acceso de base de datos SQL Server 2002, el cual se modifica para ser utilizado con una Base de ...

  17. An Empirical Evaluation of an Activity-Based Infrastructure for Supporting Cooperation in Software Engineering

    DEFF Research Database (Denmark)

    Tell, Paolo; Babar, Muhammad Ali

    2016-01-01

    Software engineering (SE) is predominantly a team effort that needs close cooperation among several people who may be geographically distributed. It has been recognized that appropriate tool support is a prerequisite to improve cooperation within SE teams. In an effort to contribute to this line...

  18. HST-WFC3 Near-Infrared Spectroscopy of Quenched Galaxies at zeta approx 1.5 from the WISP Survey: Stellar Populations Properties

    Science.gov (United States)

    Bedregal, A. G.; Scarlata, C.; Henry, A. L.; Atek, H.; Rafelski, M.; Teplitz, H. I.; Dominguez, A.; Siana, B.; Colbert, J. W.; Malkan, M.; hide

    2013-01-01

    We combine Hubble Space Telescope (HST) G102 and G141 near-IR (NIR) grism spectroscopy with HST/WFC3- UVIS, HST/WFC3-IR, and Spitzer/IRAC [3.6 microns] photometry to assemble a sample of massive (log(Mstar/M solar mass) at approx 11.0) and quenched (specific star formation rate spectroscopy for quenched sources at these redshifts. In contrast to the local universe, zeta approx 1.5 quenched galaxies in the high-mass range have a wide range of stellar population properties. We find that their spectral energy distributions (SEDs) are well fitted with exponentially decreasing star formation histories and short star formation timescales (tau less than or equal to 100 M/yr). Quenched galaxies also show a wide distribution in ages, between 1 and 4 G/yr. In the (u - r)0-versus-mass space quenched galaxies have a large spread in rest-frame color at a given mass. Most quenched galaxies populate the zeta appro. 1.5 red sequence (RS), but an important fraction of them (32%) have substantially bluer colors. Although with a large spread, we find that the quenched galaxies on the RS have older median ages (3.1 G/yr) than the quenched galaxies off the RS (1.5 G/yr). We also show that a rejuvenated SED cannot reproduce the observed stacked spectra of (the bluer) quenched galaxies off the RS. We derive the upper limit on the fraction of massive galaxies on the RS at zeta approx 1.5 to be 2 and the zeta approx 1.5 RS. According to their estimated ages, the time required for quenched galaxies off the RS to join their counterparts on the z approx. 1.5 RS is of the order of approx. 1G/yr.

  19. SOFTWARE OPEN SOURCE, SOFTWARE GRATIS?

    Directory of Open Access Journals (Sweden)

    Nur Aini Rakhmawati

    2006-01-01

    Full Text Available Normal 0 false false false IN X-NONE X-NONE MicrosoftInternetExplorer4 Berlakunya Undang – undang Hak Atas Kekayaan Intelektual (HAKI, memunculkan suatu alternatif baru untuk menggunakan software open source. Penggunaan software open source menyebar seiring dengan isu global pada Information Communication Technology (ICT saat ini. Beberapa organisasi dan perusahaan mulai menjadikan software open source sebagai pertimbangan. Banyak konsep mengenai software open source ini. Mulai dari software yang gratis sampai software tidak berlisensi. Tidak sepenuhnya isu software open source benar, untuk itu perlu dikenalkan konsep software open source mulai dari sejarah, lisensi dan bagaimana cara memilih lisensi, serta pertimbangan dalam memilih software open source yang ada. Kata kunci :Lisensi, Open Source, HAKI

  20. Los Sistemas Gestores de Flujos de Trabajo en la Gestión de Procesos Software

    OpenAIRE

    Víctor Hugo Menéndez Domínguez; María Enriqueta Castellanos Bolaños

    2016-01-01

    Hoy en día, las empresas de software se ven obligadas a mejorar su rendimiento para poder sobrevivir en un entorno altamente competitivo: los clientes demandan una mayor calidad, menor plazo de entrega, mejor servicio, atención personalizada, etc. En este trabajo se describen a los procesos software así como los flujos de trabajo. Su combinación y automatización mejora el flujo de información asociado a las actividades de dichos procesos, lo que facilita el control y permite mejorar el rendim...

  1. WebPrInSeS: automated full-length clone sequence identification and verification using high-throughput sequencing data.

    Science.gov (United States)

    Massouras, Andreas; Decouttere, Frederik; Hens, Korneel; Deplancke, Bart

    2010-07-01

    High-throughput sequencing (HTS) is revolutionizing our ability to obtain cheap, fast and reliable sequence information. Many experimental approaches are expected to benefit from the incorporation of such sequencing features in their pipeline. Consequently, software tools that facilitate such an incorporation should be of great interest. In this context, we developed WebPrInSeS, a web server tool allowing automated full-length clone sequence identification and verification using HTS data. WebPrInSeS encompasses two separate software applications. The first is WebPrInSeS-C which performs automated sequence verification of user-defined open-reading frame (ORF) clone libraries. The second is WebPrInSeS-E, which identifies positive hits in cDNA or ORF-based library screening experiments such as yeast one- or two-hybrid assays. Both tools perform de novo assembly using HTS data from any of the three major sequencing platforms. Thus, WebPrInSeS provides a highly integrated, cost-effective and efficient way to sequence-verify or identify clones of interest. WebPrInSeS is available at http://webprinses.epfl.ch/ and is open to all users.

  2. Software engineering article types: An analysis of the literature

    NARCIS (Netherlands)

    Montesi, M.; Lago, P.

    2008-01-01

    The software engineering (SE) community has recently recognized that the field lacks well-established research paradigms and clear guidance on how to write good research reports. With no comprehensive guide to the different article types in the field, article writing and reviewing heavily depends on

  3. Una Revisión Sistemática en los Marcos de Trabajo de Desarrollo Software en las MiPyMEs Productoras de Software

    Directory of Open Access Journals (Sweden)

    Antonio A. Aguileta

    2015-11-01

    Full Text Available Una revisión sistemática es considerada como un método o protocolo que permite sintetizar investigaciones científicas de diversas áreas, la Ingeniería de Software no es la excepción. En este artículo se presenta este protocolo aplicado en la búsqueda de publicaciones relacionadas con las adaptaciones a los marcos de trabajo de desarrollo de software llevadas a cabo en MiPyMEs desarrolladoras de software, en el período comprendido de 1995 al 2013, centrándose en tendencias, países y sectores que publican; así como en los modelos, metodologías, estándares, procesos técnicos, procesos de implementación y procesos de reúso del software. Los resultados obtenidos muestran que los países con mayor número de publicaciones sobre el tópico seleccionado son Estados Unidos y Reino Unido, que en su conjunto suman 21%; y que otros países suman el 79% restante. Se observa que el sector con mayor número de publicaciones es el sector educativo con 76%, seguido por los centros de investigación con 18% y el sector privado con el 6%. El modelo de procesos y la metodología más utilizados son CMMi con 33% e IDEAL con 22%, respectivamente. Los estándares más utilizados, con el 18% cada uno, son el ISO/IEC 15504 y CORBA; y los procesos del ciclo de vida del software mayormente abordados son: análisis de requisitos del sistema con un 33% y construcción con un 29%.

  4. Software para análise quantitativa da deglutição Swallowing quantitative analysis software

    Directory of Open Access Journals (Sweden)

    André Augusto Spadotto

    2008-02-01

    Full Text Available OBJETIVO: Apresentar um software que permita uma análise detalhada da dinâmica da deglutição. MATERIAIS E MÉTODOS: Participaram deste estudo dez indivíduos após acidente vascular encefálico, sendo seis do gênero masculino, com idade média de 57,6 anos. Foi realizada videofluoroscopia da deglutição e as imagens foram digitalizadas em microcomputador, com posterior análise do tempo do trânsito faríngeo da deglutição, por meio de um cronômetro e do software. RESULTADOS: O tempo médio do trânsito faríngeo da deglutição apresentou-se diferente quando comparados os métodos utilizados (cronômetro e software. CONCLUSÃO: Este software é um instrumento de análise dos parâmetros tempo e velocidade da deglutição, propiciando melhor compreensão da dinâmica da deglutição, com reflexos tanto na abordagem clínica dos pacientes com disfagia como para fins de pesquisa científica.OBJECTIVE: The present paper is aimed at introducing a software to allow a detailed analysis of the swallowing dynamics. MATERIALS AND METHODS: The sample included ten (six male and four female stroke patients, with mean age of 57.6 years. Swallowing videofluoroscopy was performed and images were digitized for posterior analysis of the pharyngeal transit time with the aid of a chronometer and the software. RESULTS: Differences were observed in the average pharyngeal swallowing transit time as a result of measurements with chronometer and software. CONCLUSION: This software is a useful tool for the analysis of parameters such as swallowing time and speed, allowing a better understanding of the swallowing dynamics, both in the clinical approach of patients with oropharyngeal dysphagia and for scientific research purposes.

  5. Planejamento da assistência de enfermagem: proposta de um software-protótipo Planificación del cuidado de enfermería: propuesta de un software-prototipo Nursing care planning: proposal for a software prototype

    Directory of Open Access Journals (Sweden)

    Dircelene Jussara Sperandio

    2005-12-01

    Full Text Available O propósito deste estudo foi descrever as etapas de desenvolvimento de um software-protótipo que possibilite aos enfermeiros, no âmbito hospitalar, atender ao planejamento da assistência de enfermagem, prescrição de enfermagem e a documentação de forma informatizada. A metodologia utilizada fundamentou-se no conceito do ciclo de vida de prototipação. Sedimentou-se em duas fases: a de definição e a de desenvolvimento. A fase de definiç��o iniciou-se com a etapa de planejamento, seguida pela definição e análise dos requisitos necessários para a construção e culminou com a produção da especificação de requisitos do software. A fase de desenvolvimento traduziu o conjunto de requisitos em um modelo informatizado, com 10 módulos, referentes ao processo de sistematização da assistência de enfermagem. A avaliação desse recurso inovador para a Sistematização da Assistência de Enfermagem nos diferentes estágios do seu processo será objeto de estudo posterior.El propósito de este estudio es desarrollar un software-prototipo para ayudar las enfermeras planear el cuidado de enfermería, hacer intervenciones y toda la documentación de una manera informatizada. La metodología se basa en el ciclo de vida de desarrollo del sistema, particularmente el concepto del prototipo, siguiendo dos fases: la definición y el desarrollo. La fase de la definición empezó con una etapa de planificación, seguido por la definición y el análisis de los requisitos para la construcción, y culminó con la especificación de los requisitos del software. La fase de desarrollo tradujo el grupo de requisitos en modelo informatizado, estructurado en 10 módulos, con respecto al proceso de alimentar el sistema del cuidado. El desempeño de este recurso innovador en las diferentes etapas del proceso de sistematización de la atención de enfermería será objeto de un estudio subsiguiente.This study aims to develop a software prototype to help

  6. A New Offset Debris Ring around a Nearby Star Observed with the HST/STIS

    Science.gov (United States)

    Krist, John; Stapelfeldt, Karl; Bryden, Geoffrey

    2011-01-01

    We are conducting an HST/STIS coronagraphic imaging study of nearby stars that have Spitzer-measured infrared excesses indicating that they are surrounded by debris disks. Around one of the stars we have imaged a debris ring with a sharp inner edge and extending from about 165 AU to 250 AU. The ring center is offset from the star by -8 AU with a visually estimated intrinsic ellipticity of e-0.1 , suggestive of gravitational perturbation of the disk by a planet, like the Fomalhaut disk. Assuming a neutral disk color, the mean surface brightness of V=22.3 mag/square arcsec makes this the second faintest disk yet imaged in scattered light, second to HD 207129.

  7. BUENAS PRÁCTICAS, UNA SOLUCIÓN PARA UN MEJOR DESARROLLO DE SOFTWARE

    Directory of Open Access Journals (Sweden)

    Liliana del Carmen Ramírez-M

    2014-12-01

    Full Text Available Este articulo tiene como objetivo principal dar a conocer una serie de buenas prácticas planteadas para un mejor desarrollo de software, basadas en las metodologías agiles más representativas se han propuesto unos valores, unas características, unos roles, unas prácticas y un ciclo de vida para el desarrollo de un proyecto de software, con lo cual se busca abarcar todo el proceso desde que surge una necesidad por parte de un cliente, hasta el momento en se tiene la seguridad de que el cliente está totalmente satisfecho con el producto. Estas prácticas planteadas buscan comprometer al equipo de trabajo e integrarlo al proyecto de una manera beneficiosa para las personas participantes, ya que pueden estar desde el inicio hasta la fase final del proyecto cumpliendo un rol u otro específicamente, logrando con esto reducción de tiempo, costos y otros.

  8. Optical studies of CdSe/HgSe and CdSe/Ag2Se core/shell nanoparticles embedded in gelatin

    International Nuclear Information System (INIS)

    Azhniuk, Yu M; Dzhagan, V M; Valakh, M Ya; Raevskaya, A E; Stroyuk, A L; Kuchmiy, S Ya; Zahn, D R T

    2008-01-01

    CdSe/HgSe and CdSe/Ag 2 Se core-shell nanoparticles are obtained by colloidal synthesis from aqueous solutions in the presence of gelatin. Optical absorption, luminescence, and Raman spectra of the nanoparticles obtained are measured. The variation of the optical spectra of CdSe/HgSe and CdSe/Ag 2 Se core-shell nanoparticles with the shell thickness is discussed. Sharp non-monotonous variation of the photoluminescence spectra at low shell coverage is observed.

  9. Comparativa de software libre para tratamiento de archivos DICOM

    OpenAIRE

    Rioja Calvo, Álvaro

    2015-01-01

    El campo de la cirugía está en constante crecimiento. Continuamente se investiga sobre nuevos avances que puedan facilitar y prever las situaciones de riesgo en las intervenciones quirúrgicas. La impresión de huesos en tres dimensiones es uno de estos avances, ya que ayuda a simular una posterior intervención, programar todos los pasos a seguir y prevenir posibles complicaciones. Este estudio es una comparativa de los diferentes softwares libres que se pueden utilizar para la exportación de a...

  10. MÉTRICAS PARA EL CONTROL DE CONFIGURACIÓN DE SOFTWARE: DEFINICIÓN Y ALGUNAS VALORACIONES

    Directory of Open Access Journals (Sweden)

    Ailyn Febles Estrada

    2003-04-01

    Full Text Available

    Los métodos de producción de software están evolucionando desde formas artesanales a la producción industrial en gran escala. La industria de software cubana no está ajena a esos cambios. Para incidir positivamente en el desarrollo de la industria y lograr establecer en ella parámetros de excelencia es imprescindible implantar modelos de procesos tomando en consideración las mejores prácticas internacionales y adaptándolas creativamente a las condiciones concretas de Cuba. Para esto, entre otros aspectos, es necesario medir. El área de las mediciones de software, a pesar de ser una de las áreas en la ingeniería de software donde se ha investigado desde hace más de 30 años, todavía no ha sido bien comprendida, ni ampliamente aplicada en la industria del software, por tanto, la implementación de las mediciones en una organización requiere un cambio tecnológico, educacional y cultural importante. Las autoras del presente artículo proponen un conjunto de métricas para aplicar en el proceso de control de configuración. Estas métricas pueden ser obtenidas a partir del modelo de procesos de control configuración de software definido en trabajos anteriores por el grupo de Ingeniería de Software del Centro de Estudios de Ingeniería y Sistemas (CEIS. También se enuncian algunas reglas básicas a tener en cuenta cuando se aplican estas métricas en una empresa.

  11. Jovian Vortices and Barges: HST observations 1994-1998

    Science.gov (United States)

    Morales, R.; Sanchez-Lavega, A.; Lecacheux, J.; Colas, F.; Miyazaki, I.

    2000-10-01

    We have used the HST-WFPC2 archived images of Jupiter in the period 1994-1998 to study the zonal and meridional distributions, long-term motions, lifetimes, interactions and other properties of the vortices larger than 2 degrees. The latitude range covered spans from +75 to -75 degrees. High-resolution images obtained with the 890nm, 410nm and 953nm wavelength filters allowed us to make a morphological classification based on their appearance in each filter. The vortices are anticyclones, and their long-term motions have been completed with ground-based images and are compared to the mean Jovian zonal wind profile. Significant differences are found between the vortex velocities and the mean zonal winds. Some vortices exhibited important drift changes in short period times. We analyze a possible correlation between their size and zonal wind velocity. On the other hand, the "barges" lie in the cyclone domains of the wind-profile and have been identified in several latitudes. Their latitudinal size is similar in all of them (typically 1.6 degrees) but their longitudinal size ranges from 1 to 32 degrees. We discuss the temporal evolution of some of these cyclonic regions. The Spanish team was supported by Gobierno Vasco PI 034/97. The French team was supported by the "Programme National de Planetologie." RM acknowledges a fellowship from Universidad Pais Vasco.

  12. PRAPRAG: software para planejamento racional de máquinas agrícolas PRAPRAG: software for rational planning of agricultural machines

    OpenAIRE

    Erivelto Mercante; Eduardo G. de Souza; Jerry A Johann; Antonio Gabriel Filho; Miguel A Uribe-Opazo

    2010-01-01

    O software PRAPRAG é uma ferramenta de escolha de máquinas e implementos agrícolas que apresentam o menor custo por área ou por quantidade produzida, bem como, faz o planejamento de aquisição das máquinas para a propriedade agrícola, do ponto de vista técnico e econômico. Foi utilizada a linguagem de programação Borland Delphi 3.0 e, a partir de prospectos das máquinas e implementos, criou-se um banco de dados onde o usuário pode cadastrar e modificar suas características de uso. O software m...

  13. Alineación entre metas organizacionales y elicitación de requisitos del software

    Directory of Open Access Journals (Sweden)

    Carlos M. Zapata J.

    2004-01-01

    Full Text Available La elicitación de los requisitos del software debe contribuir a la obtención de una primera descripción del problema que permita establecer las motivaciones para su solución mediante sistemas informáticos. Los métodos y herramientas convencionales para la elicitación de requisitos pueden, sin embargo, dejar de lado aspectos fundamentales de la organización debido a su interés por enfocarse en situaciones relativas a los problemas puntuales que aquejan el entorno del software. En este artículo se ilustra el uso de una herramienta administrativa de uso común (el diagrama causa - efecto, con algunas modificaciones, para lograr un análisis cuantitativo del grado en que se logran alinear las metas organizacionales con los requisitos correspondientes a una pieza de software.

  14. Diagnóstico al iniciar la mejora de proceso de software / Diagnosis when starting the software process improvement

    Directory of Open Access Journals (Sweden)

    Yaimí Trujillo-Casañola

    2014-04-01

    Full Text Available En el presente artículo se fundamenta la utilidad de realizar un diagnóstico al iniciar la mejora de procesos de software, haciendo uso de los factores críticos de éxito para identificar las fortalezas y las debilidades de acometer el cambio. Los autores exponen en el artículo una propuesta del proceso de diagnóstico, los indicadores y cómo estos consideran los factores críticos de éxito. Se explica cómo mejorar la fase de diagnóstico y las técnicas aplicadas en esta área para identificar el estado de la organización integralmente y valorar las condiciones para iniciar la iniciativa. Los resultados permiten que las organizaciones cuenten con los principales elementos que inciden en el proceso para la gerencia del cambio. Se ratifica la importancia la importancia del diagnóstico integral en torno a los factores críticos de éxito y se demuestra la manera de hacerlo. ABSTRACT In this paper it is explained the utility of a diagnosis when starting the software process improvement, using the critical factors of success to identify the strengths and weaknesses of undertaking the change. The authors present a proposal of the diagnostic process, the indicators and how they consider the critical factors of success. It is explained how to improve the diagnostic phase and the techniques applied in this area in order to identify the status of the organization integrally and to assess the conditions for starting the initiative. The results permit the organizations to have the main elements that influence the process of change management. It is confirmed the importance of the comprehensive diagnosis related to the critical factors of success and it is demonstrated how to do it.

  15. Software library of meteorological routines for air quality models; Libreria de software de procedimientos meteorologicos para modelos de dispersion de contaminantes

    Energy Technology Data Exchange (ETDEWEB)

    Galindo Garcia, Ivan Francisco

    1999-04-01

    fundamental para llevar a cabo la evaluacion del impacto de fuentes fijas sobre la calidad del aire. Sin embargo, los modelos requieren cierta informacion relativa a la meteorologia de la zona que se desea modelar. Algunos de estos parametros requeridos se pueden medir directamente, pero otros deben ser estimados a partir de los datos medidos. Debido a esto, para realizar un estudio de modelacion de la contaminacion atmosferica, tambien es necesario contar con un conjunto de procedimientos, relaciones y programas de computo que permitan obtener todos los parametros meteorologicos y micrometeorologicos requeridos como datos de entrada por el modelo de dispersion de contaminantes especifico que se desee utilizar. El objetivo de este trabajo es la identificacion, establecimiento e implementacion de los metodos, relaciones y procedimientos que permiten la estimacion de los parametros meteorologicos y micrometeorologicos requeridos por los modelos de dispersion de contaminantes atmosfericos recomendados por la Agencia de Proteccion Ambiental de los Estados Unidos (US-EPA), a partir de diferentes niveles de disponibilidad de informacion meteorologica primaria. Para ello se realizo un estudio sobre los diferentes modelos de dispersion atmosferica, analizando, en particular, los datos meteorologicos que requieren. Asimismo, se llevo a cabo una caracterizacion de las estaciones meteorologicas mexicanas pertenecientes al Servicio Meteorologico Nacional, de donde se obtuvo informacion referente al tipo y calidad de los datos meteorologicos que producen, a fin de establecer, en particular, una metodologia especifica para la estimacion de los datos meteorologicos necesarios para la modelacion de la calidad del aire en Mexico. Los procedimientos de estimacion desarrollados se organizaron en una libreria de software que permite la integracion de un procesador meteorologico apropiado para cada modelo de dispersion (US-EPA) que se desee utilizar. Los procedimientos de estimacion se validaron

  16. Revisión de los sistemas de control de versiones utilizados en el desarrollo de software

    Directory of Open Access Journals (Sweden)

    Edgar Tello-Leal

    2012-06-01

    Full Text Available Uno de los retos a los que se enfrentan los desarrolladores de software es generar productos eficientes y de calidad sin sacrificar tiempo o costos. Este objetivo sólo se alcanza si los actores involucrados en tal proceso pueden disponer de toda la información relacionada con el proyecto. Los sistemas de control de versiones son aplicaciones que ayudan al proceso de desarrollo de software, facilitando la gestión del control de versiones de los archivos de código fuente generados por los desarrolladores, proporcionando herramientas para la fusión y generación de una nueva versión de un proyecto, permitiendo que múltiples desarrolladores trabajen en el mismo proyecto sin ocasionar pérdida de datos o bloqueos de archivos. Además, permiten recuperar archivos generados previamente, los cuales pueden ser utilizados para solucionar errores del sistema. En el presente trabajo de investigación se presenta una revisión de las principales aplicaciones de software disponibles para la gestión del control de versiones con un enfoque hacia su utilización en el desarrollo de software. Adicionalmente, se analiza su funcionamiento de acuerdo al método de administración de la información contenida en los repositorios, describiendo el proceso de creación, actualización y generación de versiones de archivos de código almacenados en los repositorios.

  17. THE RADIAL DISTRIBUTION OF STAR FORMATION IN GALAXIES AT z ∼ 1 FROM THE 3D-HST SURVEY

    International Nuclear Information System (INIS)

    Nelson, Erica June; Van Dokkum, Pieter G.; Momcheva, Ivelina; Skelton, Rosalind E.; Leja, Joel; Brammer, Gabriel; Lundgren, Britt; Whitaker, Katherine E.; Da Cunha, Elisabete; Rix, Hans-Walter; Van der Wel, Arjen; Förster Schreiber, Natascha; Wuyts, Stijn; Franx, Marijn; Fumagalli, Mattia; Labbe, Ivo; Patel, Shannon; Kriek, Mariska; Schmidt, Kasper B.

    2013-01-01

    The assembly of galaxies can be described by the distribution of their star formation as a function of cosmic time. Thanks to the WFC3 grism on the Hubble Space Telescope (HST) it is now possible to measure this beyond the local Universe. Here we present the spatial distribution of Hα emission for a sample of 54 strongly star-forming galaxies at z ∼ 1 in the 3D-HST Treasury survey. By stacking the Hα emission, we find that star formation occurred in approximately exponential distributions at z ∼ 1, with a median Sérsic index of n = 1.0 ± 0.2. The stacks are elongated with median axis ratios of b/a = 0.58 ± 0.09 in Hα consistent with (possibly thick) disks at random orientation angles. Keck spectra obtained for a subset of eight of the galaxies show clear evidence for rotation, with inclination corrected velocities of 90-330 km s –1 . The most straightforward interpretation of our results is that star formation in strongly star-forming galaxies at z ∼ 1 generally occurred in disks. The disks appear to be 'scaled-up' versions of nearby spiral galaxies: they have EW(Hα) ∼ 100 Å out to the solar orbit and they have star formation surface densities above the threshold for driving galactic scale winds.

  18. The Radial Distribution of Star Formation in Galaxies at Z approximately 1 from the 3D-HST Survey

    Science.gov (United States)

    Nelson, Erica June; vanDokkum, Pieter G.; Momcheva, Ivelina; Brammer, Gabriel; Lundgren, Britt; Skelton, Rosalind E.; Whitaker, Katherine E.; DaCunha, Elisabete; Schreiber, Natascha Foerster; Franx, Marijn; hide

    2013-01-01

    The assembly of galaxies can be described by the distribution of their star formation as a function of cosmic time. Thanks to the WFC3 grism on the Hubble Space Telescope (HST) it is now possible to measure this beyond the local Universe. Here we present the spatial distribution of H emission for a sample of 54 strongly star-forming galaxies at z 1 in the 3D-HST Treasury survey. By stacking the H emission, we find that star formation occurred in approximately exponential distributions at z approximately 1, with a median Sersic index of n = 1.0 +/- 0.2. The stacks are elongated with median axis ratios of b/a = 0.58 +/- 0.09 in H consistent with (possibly thick) disks at random orientation angles. Keck spectra obtained for a subset of eight of the galaxies show clear evidence for rotation, with inclination corrected velocities of 90.330 km s(exp 1-). The most straightforward interpretation of our results is that star formation in strongly star-forming galaxies at z approximately 1 generally occurred in disks. The disks appear to be scaled-up versions of nearby spiral galaxies: they have EW(H alpha) at approximately 100 A out to the solar orbit and they have star formation surface densities above the threshold for driving galactic scale winds.

  19. Implementing an composition architecture for an online game software

    Directory of Open Access Journals (Sweden)

    Jaime Alberto Guzmán Luna

    2011-01-01

    Full Text Available Este artículo presenta una arquitectura para la composición de servicios Web, en la que un plan de composición se construye sobre la base de un agente de planificación, que puede ser ejecutado en forma concurrente durante su composición a fin de estimar la siguiente acción a ejecutar en lugar de preparar un completo plan que con frecuencia será invalidado. Esta característica es muy valiosa cuando se trata de abordar los problemas en tiempo real. Específicamente se propone como un dominio de prueba un software de juegos en línea, llamado ENVIRO.

  20. Utilização de Softwares no processo de ensino e aprendizagem de instrumentos de teclado

    Directory of Open Access Journals (Sweden)

    Susana Ester Krüger

    2015-05-01

    Full Text Available Neste trabalho são analisadas algumas pesquisas realizadas sobre software utilizados no processo de ensino e aprendizagem de insrtumentos de teclado. São investigadas as interseções efetuadas em pesquisas quanto as concepções educativas, instrumentos de teclado e uso de software. As pesquisas quanto as concepções educativas, intrumentos de teclado e uso de software. As pesquisas são analisadas de acordo com a forma de atuação do software no processo de ensino e aprendizagem de instrumentos de teclado? Indireta e direta. Constata-se que a utilizaçnao de software pode ser propicia ao desenvolvimento musical de estudante de instrumentos de teclado. São apontadas algumas deficiências e possibilidades do uso de softwares no processo educacional. Por fim, ressalta-se a necessidade e importância de participação dos professores na elaboração dos mesmos, utilizaçnao de concepções educativas no seu processo de criação, de sua avaliação prévia e, de realização de pesquisas mais extensas sobre tema.

  1. Software interactivo para desarrollo de habilidades matemáticas a nivel primaria

    Directory of Open Access Journals (Sweden)

    Elizabeth Guerrero Sánchez

    2014-01-01

    Full Text Available Por medio de ésta investigación se presenta una aplicación matemática con interfaz, amigable, interactiva, sencilla de instalar y de fácil manejo. Ha sido realizada mediante la metodología de prototipos para el desarrollo de software y la implementación de la técnica “Focus Group” para la retroalimentación durante el testeo correspondiente. La aplicación tiene como objetivo principal el fomentar el aprendizaje y desarrollo de las matemáticas mediante la implementación del software interactivo desarrollado a fin de reducir la deserción escolar y los altos índices de reprobación en la materia a nivel primaria, pues es en ése nivel escolar donde se tienen los primeros acercamientos con las matemáticas. A diferencia de otros software, los ejercicios están desarrollado en base a los programas de estudio que presenta la Secretaria de Educación Pública, a su vez cuenta con una base de dato en la cual llevará el control y registro de cada actividad realizada por el estudiante, en donde el maestro puede hacer consulta en cualquier momento, permitiendo identificar cuáles y cuántas veces el estudiante ha resuelto un problema, aportando una perspectiva más concreta de cuáles son los temas que más se le dificultan a cada alumno, cabe destacar que la aplicación es multiplataforma, por lo cual puede ser ejecutada en cualquier dispositivo móvil.

  2. La programación de software como competencia profesional del ingeniero en sistemas informáticos / Software programming as a professional competence of computing system engineers

    Directory of Open Access Journals (Sweden)

    San Andrés, Esthela María

    2016-01-01

    Full Text Available En el nuevo milenio con el impetuoso avance de las TIC las organizaciones y empresas demandan el desarrollo de sistemas computacionales para la automatización de diferentes procesos que permitan mejorar e incrementar su productividad y eficiencia, por lo que exigen de las instituciones de educación superior la preparación de profesionales que puedan aportar sus esfuerzos en la construcción de soluciones de negocio utilizando la tecnología computacional de vanguardia en la programación de software. El presente artículo describe los resultados parciales de una investigación que se realiza con el objetivo de formar y desarrollar la competencia profesional programar software en los Ingenieros en Sistemas Informáticos. Se realizó un diagnóstico en la carrera de Ingeniería en Sistemas Informáticos de la UTM donde se aplicaron encuestas, entrevistas y observaciones a clases, tomando una muestra de 179 estudiantes y siete profesores, los resultados identificaron insuficiencias de los estudiantes en la formación teórico-práctica en programación, lo que limita su futuro desempeño profesional. En el desarrollo de la investigación, también se utilizó el análisis y la síntesis para resumir los fundamentos teóricos esenciales que sirven de sustento a los resultados que se presentan, a través de la asignatura Programación I se muestra la relación entre la competencia y la asignatura y los resultados de aprendizaje que se deben alcanzar con las respectivas evidencias para su evaluación. Palabras clave: competencias, competencias profesionales, aprendizaje, ABSTRACT: In the new millennium with the impetuous progress of ICTs the organizations and companies demand the development of computer systems for automatizing processes which allow improving and increasing their productivity and efficiency, so they require from the higher education institutions the training of professionals capable of contributing to develop business solutions

  3. El impacto social como medio para evaluar el desempeño de los recursos humanos en las organizaciones de software.

    Directory of Open Access Journals (Sweden)

    Lídice Alvarez Pérez

    2007-03-01

    Full Text Available Los recursos humanos juegan un importante papel en el fructífero desarrollo de una organización de software y la justa evaluación en función de su desempeño se convierte en algo esencial. En este sentido, actualmente las organizaciones de producción de software han hecho intentos para lograr la calidad dentro de la organización. La aplicación de los marcos de trabajo para la gestión del software constituye un ejemplo de dichos intentos. No obstante ninguno aborda la gestión de los recursos humanos en toda su plenitud. Además, existen diversos métodos para evaluar el desempeño, pero ninguno de estos es aplicable totalmente a las organizaciones del software. En este trabajo se describe un modelo para evaluar el desempeño de los recursos humanos en una organización de software. A partir de recoger las opiniones de las personas tanto externas como internas que interactúan con la organización, así como los datos referentes a las actividades de Investigación y desarrollo, se obtiene la evaluación de un empleado. El modelo se basa en el impacto social de las actividades de la organización.

  4. Propuesta de intervención cultura organizacional para posicionamiento de marca National Software

    OpenAIRE

    2012-01-01

    El presente trabajo dirigido se realizó mediante un análisis DOFA a National Software, microempresa dedicada al desarrollo de software a la media, con el objetivo de plantear la propuesta de intervención que consiste en: Cómo promover una cultura organizacional que realce el posicionamiento de la marca National Software a nivel nacional e internacional a través del fortalecimiento de su identidad e imagen corporativa, el valor del recurso humano, como también, la importancia de implementar en...

  5. Aseguramiento de la Calidad en el Proceso de Desarrollo de Software utilizando CMMI, TSP y PSP

    OpenAIRE

    Chavarría, Alex Espejo; Oré, Sussy Bayona; Pastor, Carlos

    2016-01-01

    En la actualidad las empresas que desarrollan software se han convertido en socios estratégicos de sus clientes a través de la generación de valor, mediante la entrega de productos que soportan sus diversos procesos de negocio. Sin embargo, aún existen problemas en los proyectos de desarrollo de software como la calidad. En este artículo se describe los resultados de la implementación de un modelo de aseguramiento de la calidad que integra CMMI (Capability Maturity Model Integration), TSP (Te...

  6. THE HST/ACS COMA CLUSTER SURVEY. II. DATA DESCRIPTION AND SOURCE CATALOGS

    International Nuclear Information System (INIS)

    Hammer, Derek; Verdoes Kleijn, Gijs; Den Brok, Mark; Peletier, Reynier F.; Hoyos, Carlos; Balcells, Marc; Aguerri, Alfonso L.; Ferguson, Henry C.; Goudfrooij, Paul; Carter, David; Guzman, Rafael; Smith, Russell J.; Lucey, John R.; Graham, Alister W.; Trentham, Neil; Peng, Eric; Puzia, Thomas H.; Jogee, Shardha; Batcheldor, Dan; Bridges, Terry J.

    2010-01-01

    The Coma cluster, Abell 1656, was the target of an HST-ACS Treasury program designed for deep imaging in the F475W and F814W passbands. Although our survey was interrupted by the ACS instrument failure in early 2007, the partially completed survey still covers ∼50% of the core high-density region in Coma. Observations were performed for 25 fields that extend over a wide range of cluster-centric radii (∼1.75 Mpc or 1 0 ) with a total coverage area of 274 arcmin 2 . The majority of the fields are located near the core region of Coma (19/25 pointings) with six additional fields in the southwest region of the cluster. In this paper, we present reprocessed images and SEXTRACTOR source catalogs for our survey fields, including a detailed description of the methodology used for object detection and photometry, the subtraction of bright galaxies to measure faint underlying objects, and the use of simulations to assess the photometric accuracy and completeness of our catalogs. We also use simulations to perform aperture corrections for the SEXTRACTOR Kron magnitudes based only on the measured source flux and its half-light radius. We have performed photometry for ∼73,000 unique objects; approximately one-half of our detections are brighter than the 10σ point-source detection limit at F814W = 25.8 mag (AB). The slight majority of objects (60%) are unresolved or only marginally resolved by ACS. We estimate that Coma members are 5%-10% of all source detections, which consist of a large population of unresolved compact sources (primarily globular clusters but also ultra-compact dwarf galaxies) and a wide variety of extended galaxies from a cD galaxy to dwarf low surface brightness galaxies. The red sequence of Coma member galaxies has a color-magnitude relation with a constant slope and dispersion over 9 mag (-21 F814W < -13). The initial data release for the HST-ACS Coma Treasury program was made available to the public in 2008 August. The images and catalogs described

  7. Quetzalcoatl: Una Herramienta para Generar Contratos de Desarrollo de Software en Entornos de Outsourcing

    Directory of Open Access Journals (Sweden)

    Jezreel Mejía

    2014-03-01

    Full Text Available Actualmente el outsourcing es una de las actividades principales de trabajo. Sin embargo, las relaciones que se dan entre un cliente y un proveedor de servicios no son lo suficientemente fuertes para lograr las expectativas de los acuerdos. El contrato de outsourcing para proyectos en desarrollo de software es una alternativa a este tipo de relaciones. En este artículo se presenta la arquitectura de la herramienta Quetzalcoatl, así como las funciones principales que ofrece la herramienta, todo esto con el objetivo de generar y evaluar contratos para proyectos de desarrollo de software en entornos de outsourcing como apoyo a las PYMEs.

  8. Software educativo CHAKANA: una propuesta para desarrollar la inteligencia lógico-matemática de estudiantes universitarios

    Directory of Open Access Journals (Sweden)

    Guido Mazón Fierro

    2016-01-01

    Full Text Available Introducción: al evidenciar que los jóvenes estudiantes del segundo semestre de la Carrera de Ingeniería en Sistemas y Computación de la Universidad Nacional de Chimborazo (Ecuador poseen un nivel básico de lógica deductiva, y les cuesta resolver problemas de razonamiento con agilidad - lo cual repercute en un bajo rendimiento en la materia de matemática - el objetivo del presente estudio es facilitar un recurso didáctico asistido por computador para desarrollar la inteligencia lógico-matemática, como es el software educativo Chakana. Método: Cincuenta estudiantes compusieron el universo de investigación y una muestra aleatoria de 19 fue envolucrada en los testes. En la primera fase se diseñó y se creo el Software Educativo Chakana con un enfoque en los problemas evidenciados y, en la segunda fase - para la aplicación del software - se comenzó valorando un test inicial sobre la inteligencia lógico-matemática para luego de 14 semanas trabajar con el software Chakana, y posteriormente aplicar el test final. Resultados: la investigación demuestró cómo la elaboración y aplicación del software de razonamiento lógico Chakana tiene un impacto favorable en el desarrollo de la inteligencia lógico-matemática de los estudiantes, en especial el análisis de relaciones lógicas y de analogías. Conclusión: de manera general los estudiantes manejaran la herramienta y la encontraron actractiva. Se ha observando su aceptación además del desarrollo de la inteligencia lógico-matemática que se vio reflejado en las notas de la asignatura de matemática.

  9. Planificación Neuroquirúrgica con Software Osirix

    Science.gov (United States)

    Jaimovich, Sebastián Gastón; Guevara, Martin; Pampin, Sergio; Jaimovich, Roberto; Gardella, Javier Luis

    2014-01-01

    Introducción: La individualidad anatómica es clave para reducir el trauma quirúrgico y obtener un mejor resultado. Actualmente, el avance en las neuroimágenes ha permitido objetivar esa individualidad anatómica, permitiendo planificar la intervención quirúrgica. Con este objetivo, presentamos nuestra experiencia con el software Osirix. Descripción de la técnica: Se presentan 3 casos ejemplificadores de 40 realizados. Caso 1: Paciente con meningioma de la convexidad parasagital izquierda en área premotora; Caso 2: Paciente con macroadenoma hipofisario, operada previamente por vía transeptoesfenoidal en otra institución con una resección parcial; Caso 3: Paciente con lesiones en pedúnculo cerebeloso medio bilateral. Se realizó la planificación prequirúrgica con el software OsiriX, fusionando y reconstruyendo en 3D las imágenes de TC e IRM, para analizar relaciones anatómicas, medir distancias, coordenadas y trayectorias, entre otras funciones. Discusión: El software OsiriX de acceso libre y gratuito permite al cirujano, mediante la fusión y reconstrucción en 3D de imágenes, analizar la anatomía individual del paciente y planificar de forma rápida, simple, segura y económica cirugías de alta complejidad. En el Caso 1 se pudo analizar las relaciones del tumor con las estructuras adyacentes para minimizar el abordaje. En el Caso 2 permitió comprender la anatomía post-operatoria previa del paciente, para determinar la trayectoria del abordaje transnasal endoscópico y la necesidad de ampliar su exposición, logrando la resección tumoral completa. En el Caso 3 permitió obtener las coordenadas estereotáxicas y trayectoria de una lesión sin representación tomográfica. Conclusión: En casos de no contar con costosos sistemas de neuronavegación o estereotáxia el software OsiriX es una alternativa a la hora de planificar la cirugía, con el objetivo de disminuir el trauma y la morbilidad operatoria. PMID:25165617

  10. Longitudinal variability in Jupiter's zonal winds derived from multi-wavelength HST observations

    Science.gov (United States)

    Johnson, Perianne E.; Morales-Juberías, Raúl; Simon, Amy; Gaulme, Patrick; Wong, Michael H.; Cosentino, Richard G.

    2018-06-01

    Multi-wavelength Hubble Space Telescope (HST) images of Jupiter from the Outer Planets Atmospheres Legacy (OPAL) and Wide Field Coverage for Juno (WFCJ) programs in 2015, 2016, and 2017 are used to derive wind profiles as a function of latitude and longitude. Wind profiles are typically zonally averaged to reduce measurement uncertainties. However, doing this destroys any variations of the zonal-component of winds in the longitudinal direction. Here, we present the results derived from using a "sliding-window" correlation method. This method adds longitudinal specificity, and allows for the detection of spatial variations in the zonal winds. Spatial variations are identified in two jets: 1 at 17 ° N, the location of a prominent westward jet, and the other at 7 ° S, the location of the chevrons. Temporal and spatial variations at the 24°N jet and the 5-μm hot spots are also examined.

  11. Una introduzione ai software per il crime mapping / Observations préliminaires sur les logiciels du mappage du crime / Some introductory notes on crime mapping software

    OpenAIRE

    Ummarino Alessandro

    2013-01-01

    RiassuntoIl Crime Mapping più che una disciplina a se stante non è altro che l’applicazione di tecniche di analisi statistico-geografica allo studio dei reati. Grazie all’utilizzo dei software GIS (Geographic Information System), all’esponenziale sviluppo dell’informatica e alla facile accessibilità al web, la produzione di mappe di qualità è ormai alla portata di un qualunque utente medio. La possibilità di applicare tali tecniche di analisi è offerta in modo efficace da software GIS commerc...

  12. ZnSe/ZnSeTe Superlattice Nanotips

    Directory of Open Access Journals (Sweden)

    Young SJ

    2010-01-01

    Full Text Available Abstract The authors report the growth of ZnSe/ZnSeTe superlattice nanotips on oxidized Si(100 substrate. It was found the nanotips exhibit mixture of cubic zinc-blende and hexagonal wurtzite structures. It was also found that photoluminescence intensities observed from the ZnSe/ZnSeTe superlattice nanotips were much larger than that observed from the homogeneous ZnSeTe nanotips. Furthermore, it was found that activation energies for the ZnSe/ZnSeTe superlattice nanotips with well widths of 16, 20, and 24 nm were 76, 46, and 19 meV, respectively.

  13. Updates on the Performance and Calibration of HST/STIS

    Science.gov (United States)

    Lockwood, Sean A.; Monroe, TalaWanda R.; Ogaz, Sara; Branton, Doug; Carlberg, Joleen K.; Debes, John H.; Jedrzejewski, Robert I.; Proffitt, Charles R.; Riley, Allyssa; Sohn, Sangmo Tony; Sonnentrucker, Paule; Walborn, Nolan R.; Welty, Daniel

    2018-06-01

    The Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope (HST) has been in orbit for 21 years and continues to produce high quality scientific results using a diverse complement of operating modes. These include spatially resolved spectroscopy in the UV and optical, high spatial resolution echelle spectroscopy in the UV, and solar-blind imaging in the UV. In addition, STIS possesses unique visible-light coronagraphic modes that keep the instrument at the forefront of exoplanet and debris-disk research. As the instrument's characteristics evolve over its lifetime, the instrument team at the Space Telescope Science Institute monitors its performance and works towards improving the quality of its data products. Here we present updates on the status of the STIS CCD and FUV & NUV MAMA detectors, as well as changes to the CalSTIS reduction pipeline. We also discuss progress toward the recalibration of the E140M/1425 echelle mode. The E140M grating blaze function shapes have changed since flux calibration was carried out following SM4, which limits the relative photometric flux accuracy of some spectral orders up to 5-10% at the edges. In Cycle 25 a special calibration program was executed to obtain updated sensitivity curves for the E140M/1425 setting.

  14. An analysis of tools for automatic software development and automatic code generation

    OpenAIRE

    Viviana Yarel Rosales-Morales; Giner Alor-Hernández; Jorge Luis García-Alcaráz; Ramón Zatarain-Cabada; María Lucía Barrón-Estrada

    2015-01-01

    El desarrollo de software es una importante área en la ingeniería de software, por tal motivo han surgido técnicas, enfoques y métodos que permiten la automatización de desarrollo del mismo. En este trabajo se presenta un análisis de las herramientas para el desarrollo automático de software y la generación automática de código fuente, con el fi n de evaluarlas y determinar si cumplen o no con un conjunto de características y funcionalidades en términos de calidad. Dichas característica...

  15. CALIDAD DE LOS PROYECTOS DE SOFTWARE: REVISIONES UTILIZANDO RAZONAMIENTO BASADO EN CASOS

    Directory of Open Access Journals (Sweden)

    Martha Delgado Dapena

    2003-09-01

    Full Text Available

    En este trabajo se expone un sistema que permite planificar, controlar y dar seguimiento a las inspecciones realizadas a los proyectos de software, que utiliza el razonamiento basado en casos para planificar las inspecciones. Además, se presentan los conceptos fundamentales relacionados con las inspecciones dentro del sistema de aseguramiento de calidad, así como el procedimiento para llevarlas a cabo. También se expone una breve panorámica del razonamiento basado en casos.

  16. Diseño de la estructura organizativa e implementación de una metodología para el desarrollo de software en la Fábrica de Software de la ESPE Extensión Latacunga.

    OpenAIRE

    López Chico, Ximena del Rocío; Montaluisa Pilatasig, Edgar Fabián

    2015-01-01

    La Ingeniería de Software proporciona las guías necesarias para el desarrollo de aplicaciones de software considerando factores como la calidad y la usabilidad, relacionándolos con los métodos necesarios para implementarlos en el entorno empresarial, la realidad de cada empresa habitualmente presenta requerimientos diferentes ante un proceso metodológico. Para propiciar el entorno adecuado para el desarrollo del producto software en la ESPE Extensión Latacunga se requiere co...

  17. Maize w3 disrupts homogentisate solanesyl transferase (ZmHst) and reveals a plastoquinone-9 independent path for phytoene desaturation and tocopherol accumulation in kernels

    Science.gov (United States)

    Maize white seedling 3 (w3) has been used to study carotenoid deficiency for almost 100 years, although its genetic basis remained unknown. We show here that w3 phenotype is caused by disruption of homogentisate solanesyl transferase (HST), which catalyzes the first committed step in plastoquinone-9...

  18. Competências brasileiras na exportação de software: uma abordagem organizacional

    OpenAIRE

    Ferreira, Cíntia Borges

    2014-01-01

    Esse trabalho representa um estudo sobre as competências brasileiras na exportação de software, buscando entender como o país se posiciona no mercado externo e como poderia se posicionar. Para a sua realização, foi desenvolvida uma análise com base nos ambientes institucional, tecnológico e organizacional. Para o ambiente institucional, avaliaram-se as variáveis da atuação do governo, no que se refere às leis e às políticas setoriais, incluindo os investimentos externos, as certificações e os...

  19. PAQUETE TECNOLÓGICO PARA EL MONITOREO AMBIENTAL EN INVERNADEROS CON EL USO DE HARDWARE Y SOFTWARE LIBRE

    Directory of Open Access Journals (Sweden)

    Oziel Lugo Espinosa

    2014-01-01

    Full Text Available El monitoreo ambiental en invernaderos, en particular en México, representa un alto costo de inversión para su adopción, por lo que en ocasiones, el productor opta por omitir esta infraestructura tecnológica. Esta condición suprime las ventajas del monitoreo y control climático del invernadero, lo cual repercute en la cantidad y calidad de la producción. En el presente trabajo se presenta el desarrollo de un paquete tecnológico de bajo costo para el monitoreo ambiental de invernaderos. El paquete se basa en el uso de software y hardware libres y considera la construcción y adaptación de sensores para medir las variables climatológicas dentro y fuera de un invernadero, la construcción y adaptación de interfaces electrónicas para capturar los valores de los sensores y el desarrollo de software para la interpretación de los datos. Como plataformas de software y hardware libres se utilizaron Java y Arduino, respectivamente. Se comparó los sensores desarrollados contra sensores comerciales en condiciones climatológicas iguales y se obtuvo los mismos datos con una diferencia notable en el tiempo de reacción de los sensores desarrollados debido al mayor peso por los materiales utilizados en su construcción.

  20. Gemini IFU, VLA, and HST observations of the OH megamaser galaxy IRAS F23199+0123: the hidden monster and its outflow

    Science.gov (United States)

    Hekatelyne, C.; Riffel, Rogemar A.; Sales, Dinalva; Robinson, Andrew; Gallimore, Jack; Storchi-Bergmann, Thaisa; Kharb, Preeti; O'Dea, Christopher; Baum, Stefi

    2018-03-01

    We present Gemini Multi-Object Spectrograph (GMOS) Integral field Unit (IFU), Very Large Array (VLA), and Hubble Space Telescope (HST) observations of the OH megamaser (OHM) galaxy IRAS F23199+0123. Our observations show that this system is an interacting pair, with two OHM sources associated with the eastern (IRAS 23199E) member. The two members of the pair present somewhat extended radio emission at 3 and 20 cm, with flux peaks at each nucleus. The GMOS-IFU observations cover the inner ˜6 kpc of IRAS 23199E at a spatial resolution of 2.3 kpc. The GMOS-IFU flux distributions in Hα and [N II] λ6583 are similar to that of an HST [N II]+Hα narrow-band image, being more extended along the north-east-south-west direction, as also observed in the continuum HST F814W image. The GMOS-IFU Hα flux map of IRAS 23199E shows three extranuclear knots attributed to star-forming complexes. We have discovered a Seyfert 1 nucleus in this galaxy, as its nuclear spectrum shows an unresolved broad (full width at half-maximum ≈2170 km s-1) double-peaked Hα component, from which we derive a black hole mass of M_{BH} = 3.8^{+0.3}_{-0.2}× 106 M⊙. The gas kinematics shows low velocity dispersions (σ) and low [N II]/Hα ratios for the star-forming complexes and higher σ and [N II]/Hα surrounding the radio emission region, supporting interaction between the radio plasma and ambient gas. The two OH masers detected in IRAS F23199E are observed in the vicinity of these enhanced σ regions, supporting their association with the active nucleus and its interaction with the surrounding gas. The gas velocity field can be partially reproduced by rotation in a disc, with residuals along the north-south direction being tentatively attributed to emission from the front walls of a bipolar outflow.

  1. STELLAR POPULATIONS OF LYMAN BREAK GALAXIES AT z {approx_equal} 1-3 IN THE HST/WFC3 EARLY RELEASE SCIENCE OBSERVATIONS

    Energy Technology Data Exchange (ETDEWEB)

    Hathi, N. P.; McCarthy, P. J. [Observatories of the Carnegie Institution for Science, Pasadena, CA 91101 (United States); Cohen, S. H.; Windhorst, R. A.; Rutkowski, M. J. [School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287-1404 (United States); Ryan, R. E. Jr.; Koekemoer, A. M.; Bond, H. E. [Space Telescope Science Institute, Baltimore, MD 21218 (United States); Finkelstein, S. L. [Department of Astronomy, University of Texas, Austin, TX 78712 (United States); Yan, H. [Department of Physics and Astronomy, University of Missouri, Columbia, MO 65211 (United States); O' Connell, R. W. [Department of Astronomy, University of Virginia, Charlottesville, VA 22904-4325 (United States); Straughn, A. N.; Kimble, R. A. [NASA-Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Balick, B. [Department of Astronomy, University of Washington, Seattle, WA 98195-1580 (United States); Calzetti, D. [Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States); Disney, M. J. [School of Physics and Astronomy, Cardiff University, Cardiff CF24 3AA (United Kingdom); Dopita, M. A. [Research School of Astronomy and Astrophysics, Australian National University, Weston Creek, ACT 2611 (Australia); Frogel, Jay A. [Astronomy Department, King Abdulaziz University, P.O. Box 80203, Jeddah (Saudi Arabia); Hall, D. N. B. [Institute for Astronomy, University of Hawaii, Honolulu, HI 96822 (United States); Holtzman, J. A., E-mail: nhathi@obs.carnegiescience.edu [Department of Astronomy, New Mexico State University, Las Cruces, NM 88003 (United States); and others

    2013-03-10

    We analyze the spectral energy distributions (SEDs) of Lyman break galaxies (LBGs) at z {approx_equal} 1-3 selected using the Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) UVIS channel filters. These HST/WFC3 observations cover about 50 arcmin{sup 2} in the GOODS-South field as a part of the WFC3 Early Release Science program. These LBGs at z {approx_equal} 1-3 are selected using dropout selection criteria similar to high-redshift LBGs. The deep multi-band photometry in this field is used to identify best-fit SED models, from which we infer the following results: (1) the photometric redshift estimate of these dropout-selected LBGs is accurate to within few percent; (2) the UV spectral slope {beta} is redder than at high redshift (z > 3), where LBGs are less dusty; (3) on average, LBGs at z {approx_equal} 1-3 are massive, dustier, and more highly star forming, compared to LBGs at higher redshifts with similar luminosities (0.1L* {approx}< L {approx}< 2.5L*), though their median values are similar within 1{sigma} uncertainties. This could imply that identical dropout selection technique, at all redshifts, finds physically similar galaxies; and (4) the stellar masses of these LBGs are directly proportional to their UV luminosities with a logarithmic slope of {approx}0.46, and star formation rates are proportional to their stellar masses with a logarithmic slope of {approx}0.90. These relations hold true-within luminosities probed in this study-for LBGs from z {approx_equal} 1.5 to 5. The star-forming galaxies selected using other color-based techniques show similar correlations at z {approx_equal} 2, but to avoid any selection biases, and for direct comparison with LBGs at z > 3, a true Lyman break selection at z {approx_equal} 2 is essential. The future HST UV surveys, both wider and deeper, covering a large luminosity range are important to better understand LBG properties and their evolution.

  2. Comparativo dos softwares de gerenciamento de referências bibliográficas: Mendeley, EndNote e Zotero

    Directory of Open Access Journals (Sweden)

    Eduardo Kazumi Yamakawa

    Full Text Available A elaboração de uma revisão bibliográfica confiável, a partir de trabalhos relevantes publicados anteriormente, é fundamental para evidenciar a originalidade e a contribuição científica dos trabalhos de pesquisa. Devido à grande quantidade de bases de dados e de publicações disponíveis, torna-se necessário utilizar ferramentas que auxiliem na gestão das referências bibliográficas de uma maneira fácil e padronizada. O objetivo deste artigo é examinar três softwares de gerenciamento bibliográfico utilizados com frequência por pesquisadores acadêmicos, são eles: Mendeley, EndNote e Zotero. Nesse sentido, buscou-se, em primeiro lugar, evidenciar seus principais benefícios e as possíveis dificuldades de utilização. Em segundo lugar, procurou-se comparar suas principais características por meio de uma pesquisa teórico-conceitual baseada em literatura especializada, o que permitiu utilizá-los e analisá-los de maneira crítica. Assim sendo, evidenciou-se as principais particularidades de cada software e foi elaborado um quadro comparativo entre os mesmos. Considerando as características analisadas nos três softwares, concluiu-se que todos, ao mesmo tempo em que facilitam o trabalho dos pesquisadores, possuem ferramentas que facilitam as buscas, a organização e a análise dos artigos.

  3. Light measurement model to assess software development process improvement Modelo liviano de medidas para evaluar la mejora de procesos de desarrollo de software MLM-PDS

    Directory of Open Access Journals (Sweden)

    Diana Vásquez

    2010-12-01

    de mejora de procesos no es suficiente para decir siuna empresa realmente está obteniendo beneficios, definitivamente una de las primeras acciones en un proyecto de mejora es el poder determinar el estadoactual del proceso. Sólo midiendo es posible conocer el estado de un proceso de manera objetiva, y sólo gracias a esto se pueden planificar estrategias y soluciones acerca delas mejoras a realizar y según los objetivos de la organización. Este artículo propone un modelo liviano de medidas para evaluar un proyecto de mejora deprocesos de software, con el cual se busca ayudar a las empresas de desarrollode software colombianas a determinar si el proceso de mejora que implementan está siendo eficaz con relación a los objetivos y metas establecidas al inicio del proyecto. Esto se lleva a cabo a través del uso de medidas que permiten evaluar el proceso de mejora de sus procesos, facilitando la caracterizaciónde las prácticas actuales de la empresa y la identificación de las debilidades, fortalezas y habilidades de los procesos que son llevados a cabo dentro de ésta, permitiendo controlar y evitar las causas de baja calidad y desviaciones encostos o en planificación.

  4. Los Sistemas Gestores de Flujos de Trabajo en la Gestión de Procesos Software

    Directory of Open Access Journals (Sweden)

    Víctor Hugo Menéndez Domínguez

    2016-11-01

    Full Text Available Hoy en día, las empresas de software se ven obligadas a mejorar su rendimiento para poder sobrevivir en un entorno altamente competitivo: los clientes demandan una mayor calidad, menor plazo de entrega, mejor servicio, atención personalizada, etc. En este trabajo se describen a los procesos software así como los flujos de trabajo. Su combinación y automatización mejora el flujo de información asociado a las actividades de dichos procesos, lo que facilita el control y permite mejorar el rendimiento, reducir costos y plazos, minimizar errores y garantiza una mayor calidad, entre otras ventajas.

  5. Movie Showing Motion in the R AQR Jet From October 1991 to October 1993 Using HST FOC Data

    Science.gov (United States)

    Hollis, J. M.; Lyon, R. G.; Dorband, J. E.; Feibelman, W. A.

    1995-03-01

    This video graphically shows sub-arcsecond changes in the morphology of the inner 5 arcseconds of the R Aqr jet over a two-year period in the light of [O II] at 2470 /AA. These unsaturated data were taken with the Hubble Space Telescope (HST) Faint Object Camera (FOC) when the primary mirror flaw was still affecting observations. Images of the R Aqr stellar jet were successfully restored to the original design resolution by completely characterizing the telescope-camera system with the aid of phase-retrieval techniques. Thus, a noise-free point spread function was employed in the final restorations which utilized the maximicrons entropy method (MEM). The video shows that the northeast (NE)-southwest (SW) oriented jet-counterjet rotates in projection on the sky in a counter clockwise manner. Moreover, this motion appears to compress the leading side of the jet. Further, the data clearly show that the jet is expanding along the NE-SW axis with a prominent helical-like structure evident in the stronger NE side of the jet. We interpret the rotational motion as likely due to precession of the accretion disk which probably is responsible for the two-sided jet structure, and the helical structure as likely due to the orbital motion of the hot companion and accretion disk around the Mira primary. The restoration computations and the algorithms employed were effected on a massively parallel computer system, and demonstrate that mining of flawed HST data can be scientifically worthwhile.

  6. La aplicación del software libre en la representación de íncipits musicales

    Directory of Open Access Journals (Sweden)

    Ignacio José Lizarán Rus

    2012-01-01

    Full Text Available Desde los inicios de la catalogación de la música notada, se ha detectado la necesidad de utilizar los íncipits musicales que faciliten la identificación y estudio de las obras. Actualmente se está utilizando el lenguaje alfanumérico Plaine Easie Code para su codificación por la facilidad de almacenamiento y gestión por parte de los sistemas de información. Pero es necesario obtener una representación gráfica de los íncipits para una manejo más ágil por parte de los usuarios de los catálogos musicales. Se propone la utilización de software libre para la obtención del íncipits musical de forma gráfica, para ello se ha elaborado un script de conversión del Plaine Easie Code al software Lilypond de representación gráfica de música notada.

  7. Generación Automática de Software para Sistemas de Tiempo Real: Un Enfoque basado en Componentes, Modelos y Frameworks

    Directory of Open Access Journals (Sweden)

    Diego Alonso

    2012-04-01

    Full Text Available Resumen: Los Sistemas de Tiempo-Real poseen características que los hacen particularmente sensibles a las decisiones arquitectónicas que se adopten. El uso de Frameworks y Componentes ha demostrado ser eficaz en la mejora de la productividad y calidad del software, sobre todo si se combina con enfoques de Líneas de Productos. Sin embargo, los resultados en cuanto a reutilización y estandarización dejan patente la ausencia de portabilidad tanto de los diseños como las implementaciones basadas en componentes. Este artículo, fundamentado en el Desarrollo de Software Dirigido por Modelos, presenta un enfoque que separa la descripción de aplicaciones de tiempo–real basadas en componentes de sus posibles implementaciones para distintas plataformas. Esta separación viene soportada por la integración automática del código obtenido a partir de los modelos de entrada en frameworks implementados usando tecnología orientada a objetos. Asimismo, se detallan las decisiones arquitectónicas adoptadas en la implementación de uno de estos frameworks, que se utilizará como caso de estudio para ilustrar los beneficios derivados del enfoque propuesto. Por último, se realiza una comparativa en términos de coste de desarrollo con otros enfoques alternativos. Abstract: Real-Time Systems have some characteristics that make them particularly sensitive to architectural decisions. The use of Frameworks and Components has proven effective in improving productivity and software quality, especially when combined with Software Product Line approaches. However, the results in terms of software reuse and standardization make the lack of portability of both the design and componentbased implementations clear. This article, based on the Model- Driven Software Development paradigm, presents an approach that separates the component-based description of real-time applications from their possible implementations on different

  8. Nuevas formas de valorización del conocimiento en el esquema de realización de ganancia del capital : caso: Asociación Mexicana Empresarial del Software Libre

    OpenAIRE

    Cano Robles, Alfonso

    2010-01-01

    Para hacer evidente las dinámicas que rigen la sociedad capitalista del conocimiento. Se observa una realidad en movimiento que presenta nuevas formas de valorización y de realización de ganancia. A partir de estas categorías de análisis, se observa la realidad concreta que presenta la industria del software en general y del contexto mexicano en particular ante la práctica social del software libre en la Asociación Mexicana Empresarial del software libre (AMESOL). Para ello, se hace uso de la...

  9. A aplicação do QFD no desenvolvimento de software: um estudo de caso

    Directory of Open Access Journals (Sweden)

    Fernando Antônio Sonda

    2000-06-01

    Full Text Available Este trabalho tem como objetivo apresentar a aplicação do QFD como ferramenta de suporte para o planejamento e desenvolvimento de um software de custos, visando um melhor atendimento das características demandadas pelo cliente, bem como a determinação de indicadores para controlar o processo de desenvolvimento do produto. O trabalho foi desenvolvido a partir de uma pesquisa de mercado realizada com usuários de softwares de custos e demais pessoas envolvidas com o gerenciamento de custos. Com a aplicação do QFD, observou-se que a definição antecipada das características principais do sistema é fundamental para o desenvolvimento de um software. O QFD vem se somar as demais ferramentas de análise de sistemas proporcionando, simultaneamente, um desenvolvimento mais rápido e mais qualificado.This paper presents an application of QFD for planning and development of a cost software. The QFD was chosen aiming a better assessment of the user desires as well as the indication of the parameters for process control. The work was initiated from a market survey conducted on users of cost software and other people involved in cost management. The use of the QFD shows that the early definition of the key characteristics of the system is essential in software development. The QFD complements the use of other system analysis techniques and contributes for a faster and more qualified software development.

  10. seXY: a tool for sex inference from genotype arrays.

    Science.gov (United States)

    Qian, David C; Busam, Jonathan A; Xiao, Xiangjun; O'Mara, Tracy A; Eeles, Rosalind A; Schumacher, Frederick R; Phelan, Catherine M; Amos, Christopher I

    2017-02-15

    Checking concordance between reported sex and genotype-inferred sex is a crucial quality control measure in genome-wide association studies (GWAS). However, limited insights exist regarding the true accuracy of software that infer sex from genotype array data. We present seXY, a logistic regression model trained on both X chromosome heterozygosity and Y chromosome missingness, that consistently demonstrated >99.5% sex inference accuracy in cross-validation for 889 males and 5,361 females enrolled in prostate cancer and ovarian cancer GWAS. Compared to PLINK, one of the most popular tools for sex inference in GWAS that assesses only X chromosome heterozygosity, seXY achieved marginally better male classification and 3% more accurate female classification. https://github.com/Christopher-Amos-Lab/seXY. Christopher.I.Amos@dartmouth.edu. Supplementary data are available at Bioinformatics online. © The Author 2016. Published by Oxford University Press. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com

  11. The free/open source software movement: resistance or change? = O movimento de software livre/aberto: resistência ou mudança?

    Directory of Open Access Journals (Sweden)

    Georgopoulou, Panayiota

    2009-01-01

    Full Text Available Num momento em que as empresas privadas estão inventando modos de "bloqueio de informação" e em que governos neo-liberais estão impondo sanções severas para aqueles que violam os direitos de propriedade intelectual, o Movimento de Software Liver/Aberto foi contra o neo-liberalismo e a privatização generalizada: o movimento desafia regulações de propriedade em uma área-chave de crescimento das sociedades capitalistas contemporâneas, a saber, a construção e utilização de informações. No final dos anos 1990, o Movimento de Software Livre/Aberto parecia ser uma força desestabilizadora e perturbadora da propriedade intelectual e do neo-liberalismo, ainda como software aberto, ele se transformou em um fenômeno econômico singular, indicando que a comercialização e ganhos financeiros já podem existir sem que se baseie no conceito de propriedade. Isto pode não ser prejudicial para a lógica capitalista, mas alargar as suas perspectivas. Ao negar o regime de propriedade imposto sobre a informação e ao colocar o potencial da "economia de abundância" do novo mundo digital à disposição da boa utilização, o Movimento de Software Livre/Aberto está desistindo de um plano de resistência política ou mostrando o caminho para uma potencial transformação do capitalismo? Talvez as novas condições da política podem ser encontradas no coração da economia e na sua transição em direção a uma "economia de abundância" no mundo digital

  12. Global Software Engineering: A Software Process Approach

    Science.gov (United States)

    Richardson, Ita; Casey, Valentine; Burton, John; McCaffery, Fergal

    Our research has shown that many companies are struggling with the successful implementation of global software engineering, due to temporal, cultural and geographical distance, which causes a range of factors to come into play. For example, cultural, project managementproject management and communication difficulties continually cause problems for software engineers and project managers. While the implementation of efficient software processes can be used to improve the quality of the software product, published software process models do not cater explicitly for the recent growth in global software engineering. Our thesis is that global software engineering factors should be included in software process models to ensure their continued usefulness in global organisations. Based on extensive global software engineering research, we have developed a software process, Global Teaming, which includes specific practices and sub-practices. The purpose is to ensure that requirements for successful global software engineering are stipulated so that organisations can ensure successful implementation of global software engineering.

  13. Hubble Space Telescope nickel-hydrogen battery and cell testing - An update

    Science.gov (United States)

    Brewer, Jeffrey C.; Whitt, Thomas H.

    1992-01-01

    NASA's HST uses Ni-H2 batteries. NASA-Marshall has been conducting developmental tests of such batteries in both six-battery and 22-cell single battery arrays. Tests have recently been conducted on such batteries with a view to the possible need to free additional memory in the HST onboard computer; the electrical power system could contribute to this end by eliminating its software control charge mode capability, which requires significant computer memory capacity.

  14. Método para generar casos de prueba funcional en el desarrollo de software Generating functional testing case method in software development

    Directory of Open Access Journals (Sweden)

    Liliana González Palacio

    2009-07-01

    Full Text Available Un aspecto crucial en el control de calidad del desarrollo de software son las pruebas y, dentro de estas, las pruebas funcionales, en las cuales se hace una verificación dinámica del comportamiento de un sistema, basada en la observación de un conjunto seleccionado de ejecuciones controladas o casos de prueba. Para hacer pruebas funcionales se requiere una planificación que consiste en definir los aspectos a chequear y la forma de verificar su correcto funcionamiento, punto en el cual adquieren sentido los casos de prueba. En este artículo derivado de investigación se define un método para generar casos de prueba funcional a partir de casos de uso del sistema, como producto intermedio del proyecto cofinanciado titulado "Herramienta para la documentación de pruebas funcionales"Testing is a main aspect in quality control of software development, especially functional tests. The aim of functional testing is to dynamically verify the system behavior, based on the observation of a given set of controlled executions or test cases. Planning is required to make functional tests, defining the aspects to be checked and the way to verify its proper operation; this allows test cases make sense. In this paper (research based, we propose a method to generate functional test cases from system use cases, based on the co-financed project "Tool for Documenting Functional Testing."

  15. Hubble Space Telescope via the Web

    Science.gov (United States)

    O'Dea, Christopher P.

    The Space Telescope Science Institute (STScI) makes available a wide variety of information concerning the Hubble Space Telescope (HST) via the Space Telescope Electronic Information Service (STEIS). STEIS is accessible via anonymous ftp, gopher, WAIS, and WWW. The information on STEIS includes how to propose for time on the HST, the current status of HST, reports on the scientific instruments, the observing schedule, data reduction software, calibration files, and a set of publicly available images in JPEG, GIF and TIFF format. STEIS serves both the astronomical community as well as the larger Internet community. WWW is currently the most widely used interface to STEIS. Future developments on STEIS are expected to include larger amounts of hypertext, especially HST images and educational material of interest to students, educators, and the general public, and the ability to query proposal status.

  16. Software engineering architecture-driven software development

    CERN Document Server

    Schmidt, Richard F

    2013-01-01

    Software Engineering: Architecture-driven Software Development is the first comprehensive guide to the underlying skills embodied in the IEEE's Software Engineering Body of Knowledge (SWEBOK) standard. Standards expert Richard Schmidt explains the traditional software engineering practices recognized for developing projects for government or corporate systems. Software engineering education often lacks standardization, with many institutions focusing on implementation rather than design as it impacts product architecture. Many graduates join the workforce with incomplete skil

  17. Documentación y análisis de los principales frameworks de arquitectura de software en aplicaciones empresariales

    OpenAIRE

    Sarasty España, Hugo Fernando

    2016-01-01

    Este documento se enfoca en un tema común hoy en día en el ambiente tecnológico y empresarial, el cual es la arquitectura de software y su aplicabilidad a través de frameworks a proyectos empresariales. Este documento de investigación servirá de base para obtener un conocimiento y entendimiento de los frameworks de arquitectura de software más usados en el desarrollo de aplicaciones empresariales, determinando su aplicabilidad según el proyecto que se esté abordando. Facultad de Informátic...

  18. USO EFECTIVO DE LOS RECURSOS HUMANOS IMPLICADOS EN EL PROCESO DE DESARROLLO DE SOFTWARE

    Directory of Open Access Journals (Sweden)

    Yucely López Trujillo

    2006-12-01

    Full Text Available

    En el proceso de desarrollo de software, empleando metodologías como PSP (Personal Software Process, Proceso de Software Personal y TSP (Team Software Process, Proceso de Software en Equipo, se obtendrán numerosas medidas de los ingenieros, importantes para analizar la toma de decisiones inteligentes en el ámbito de la gestión de proyectos informáticos. El objetivo general del presente trabajo es valorar la utilidad de diseñar un

     

    data mart y la aplicación de técnicas de minería de datos en el reconocimiento y extracción de información desconocida, a partir de la cual se seleccionen los ingenieros idóneos para desempeñar exitosamente los diferentes roles y responsabilidades en un equipo de proyecto.

  19. Software educativo: morfofisiología del ojo humano

    Directory of Open Access Journals (Sweden)

    Dianelys León Medina

    2014-10-01

    Full Text Available Introducción: el desarrollo acelerado tecnológico ha dado surgimiento a las Nuevas Tecnologías de la Información y las Comunicaciones con implicaciones en la enseñanza de la medicina en Cuba, que se ajusta a la inserción del egresado en la comunidad, para desarrollar acciones de salud y brindar servicios médicos de calidad, en especialidades como la oftalmología. Objetivo: diseñar un software educativo para la enseñanza y aprendizaje de las características morfofuncionales del órgano de la visión que tribute al modo de actuación de los estudiantes de primer año de medicina de la Facultad de Ciencias Médicas del Este de la Habana. Material y método: estudio descriptivo, transversal, de corte pedagógico de los resultados de promoción de la asignatura Morfofisiología III. Se utilizarón métodos teóricos, empíricos, materialista dialéctico y estadísticos. El universo y la muestra estuvo conformada por profesores de: informática, especialistas en Medicina General Integral y Ciencias Básicas. Resultados: resultó necesario perfeccionar los medios de enseñanza y lograr una concepción científica del mundo utilizando los avances de las nuevas tecnologías. El software consta de varios módulos, en los que se presentan contenidos morfofisiológicos esenciales y enfermedades oculares más frecuentes y de mayor importancia para la formación del médico general. Conclusiones: el software constituye un aporte novedoso al proceso enseñanza aprendizaje del órgano de la visión. Tributa al modo de actuación del futuro egresado, mediante la formación de valores, interactividad con el contenido, retroalimentación, evaluación, y el desarrollo de habilidades como el trabajo independiente y autopreparación utilizando los modernos medios de enseñanza.

  20. The Number Density Evolution of Extreme Emission Line Galaxies in 3D-HST: Results from a Novel Automated Line Search Technique for Slitless Spectroscopy

    Science.gov (United States)

    Maseda, Michael V.; van der Wel, Arjen; Rix, Hans-Walter; Momcheva, Ivelina; Brammer, Gabriel B.; Franx, Marijn; Lundgren, Britt F.; Skelton, Rosalind E.; Whitaker, Katherine E.

    2018-02-01

    The multiplexing capability of slitless spectroscopy is a powerful asset in creating large spectroscopic data sets, but issues such as spectral confusion make the interpretation of the data challenging. Here we present a new method to search for emission lines in the slitless spectroscopic data from the 3D-HST survey utilizing the Wide-Field Camera 3 on board the Hubble Space Telescope. Using a novel statistical technique, we can detect compact (extended) emission lines at 90% completeness down to fluxes of 1.5(3.0)× {10}-17 {erg} {{{s}}}-1 {{cm}}-2, close to the noise level of the grism exposures, for objects detected in the deep ancillary photometric data. Unlike previous methods, the Bayesian nature allows for probabilistic line identifications, namely redshift estimates, based on secondary emission line detections and/or photometric redshift priors. As a first application, we measure the comoving number density of Extreme Emission Line Galaxies (restframe [O III] λ5007 equivalent widths in excess of 500 Å). We find that these galaxies are nearly 10× more common above z ∼ 1.5 than at z ≲ 0.5. With upcoming large grism surveys such as Euclid and WFIRST, as well as grisms featured prominently on the NIRISS and NIRCam instruments on the James Webb Space Telescope, methods like the one presented here will be crucial for constructing emission line redshift catalogs in an automated and well-understood manner. This work is based on observations taken by the 3D-HST Treasury Program and the CANDELS Multi-Cycle Treasury Program with the NASA/ESA HST, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555.

  1. Modelo estructural para evaluar las competencias del desarrollador de software

    Directory of Open Access Journals (Sweden)

    José Luis Cantú-Mata

    2014-01-01

    Full Text Available Cada vez son más las empresas que recurren a la contratación de proveedores de servicios para realizar actividades “No centrales” en la organización. El propósito del estudio es desarrollar y validar un modelo estructural para evaluar las competencias del desarrollador de software. La evaluación fue realizada mediante la calidad del servicio proporcionado desde la perspectiva de la empresa cliente, cuyos resultados son de 32 empresas que contrataron el servicio de Outsourcing de software. Se utilizó el software SMART–PLS para realizar el análisis estadístico obteniendo una R 2 : de 0.836 y 0.641 para las variables Preparación empleado–empresa (Y 1 y Personal competente actualizado (Y 2 , respectivamente.

  2. Workshop on Software Development Tools for Petascale Computing

    Energy Technology Data Exchange (ETDEWEB)

    Vetter, Jeffrey [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Georgia Inst. of Technology, Atlanta, GA (United States)

    2007-08-01

    Petascale computing systems will soon be available to the DOE science community. Recent studies in the productivity of HPC platforms point to better software environments as a key enabler to science on these systems. To prepare for the deployment and productive use of these petascale platforms, the DOE science and general HPC community must have the software development tools, such as performance analyzers and debuggers that meet application requirements for scalability, functionality, reliability, and ease of use. In this report, we identify and prioritize the research opportunities in the area of software development tools for high performance computing. To facilitate this effort, DOE hosted a group of 55 leading international experts in this area at the Software Development Tools for PetaScale Computing (SDTPC) Workshop, which was held in Washington, D.C. on August 1 and 2, 2007. Software development tools serve as an important interface between the application teams and the target HPC architectures. Broadly speaking, these roles can be decomposed into three categories: performance tools, correctness tools, and development environments. Accordingly, this SDTPC report has four technical thrusts: performance tools, correctness tools, development environment infrastructures, and scalable tool infrastructures. The last thrust primarily targets tool developers per se, rather than end users. Finally, this report identifies non-technical strategic challenges that impact most tool development. The organizing committee emphasizes that many critical areas are outside the scope of this charter; these important areas include system software, compilers, and I/O.

  3. MGRSOFT: UN MODELO PARA GESTIONAR LAS REVISIONES EN LA PEQUEÑA Y MEDIANA EMPRESA DE SOFTWARE

    Directory of Open Access Journals (Sweden)

    Sigrid Reloba Varela

    2005-09-01

    Full Text Available

    La calidad del producto final, está estrechamente ligada a la calidad del proceso de desarrollo de software, entre otros aspectos. Una parte importante del sistema de aseguramiento de la calidad lo constituyen las revisiones, que se realizan en los diferentes momentos del ciclo de desarrollo del proyecto. En este trabajo se expone una propuesta para introducir las revisiones en la pequeña y mediana empresa (PYME desarrolladora de software, aplicable a las condiciones de la industria nacional. Se describe un procedimiento para su introducción paulatina, de forma tal que la empresa pueda transitar gradualmente de la situación actual a un nivel superior de organización del proceso de desarrollo de software, que permita obtener productos con mayor calidad.

     

  4. Software FMEA analysis for safety-related application software

    International Nuclear Information System (INIS)

    Park, Gee-Yong; Kim, Dong Hoon; Lee, Dong Young

    2014-01-01

    Highlights: • We develop a modified FMEA analysis suited for applying to software architecture. • A template for failure modes on a specific software language is established. • A detailed-level software FMEA analysis on nuclear safety software is presented. - Abstract: A method of a software safety analysis is described in this paper for safety-related application software. The target software system is a software code installed at an Automatic Test and Interface Processor (ATIP) in a digital reactor protection system (DRPS). For the ATIP software safety analysis, at first, an overall safety or hazard analysis is performed over the software architecture and modules, and then a detailed safety analysis based on the software FMEA (Failure Modes and Effect Analysis) method is applied to the ATIP program. For an efficient analysis, the software FMEA analysis is carried out based on the so-called failure-mode template extracted from the function blocks used in the function block diagram (FBD) for the ATIP software. The software safety analysis by the software FMEA analysis, being applied to the ATIP software code, which has been integrated and passed through a very rigorous system test procedure, is proven to be able to provide very valuable results (i.e., software defects) that could not be identified during various system tests

  5. La construcción de un cluster de software en la frontera noroeste de México

    Directory of Open Access Journals (Sweden)

    Alfredo Hualde

    2004-01-01

    Full Text Available El presente trabajo aborda las implicaciones que tiene la formación y desarrollo del cluster de tecnologías de información y software de Baja California. En el trabajo se trata de entender el cluster ubicándolo en su contexto territorial y sectorial. Al mismo tiempo se presentan sus características específicas principales a partir de una encuesta realizada por Deloitte & Touche. También se desarrolla una reflexión acerca del significado del proyecto de creación del cluster de software mencionado en relación con los conceptos y significados de la frontera, la inserción de la región en cadenas globales, y las posibilidades de crear clusters de desarrollo endógeno que estimulen la creación de sistemas de innovación regionales.

  6. The Design and Development of a Computerized Tool Support for Conducting Senior Projects in Software Engineering Education

    Science.gov (United States)

    Chen, Chung-Yang; Teng, Kao-Chiuan

    2011-01-01

    This paper presents a computerized tool support, the Meetings-Flow Project Collaboration System (MFS), for designing, directing and sustaining the collaborative teamwork required in senior projects in software engineering (SE) education. Among many schools' SE curricula, senior projects serve as a capstone course that provides comprehensive…

  7. CLUSTER DE PEQUENAS E MÉDIAS EMPRESAS: A CONFIGURAÇÃO ORGANIZACIONAL DO PARQUE DE SOFTWARE DE CURITIBA

    Directory of Open Access Journals (Sweden)

    Jansen Maia Del Corso

    2011-09-01

    Full Text Available O objetivo deste trabalho é analisar como um cluster se organiza para se adaptar a um ambiente competitivo, rápido, dinâmico e intensivo em conhecimentos dos dias atuais. Essa é uma pesquisa explicativa, de métodos qualitativos, utilizando como estratégia de pesquisa o estudo de caso. Identificou-se que o Parque de Software de Curitiba não apresenta desenvolvidas todas as vantagens de um cluster, devido ao reduzido número de integrantes. Como conclusão, a configuração organizacional do Parque de Software de Curitiba é apontada como mais adaptada ao ambiente competitivo do século XXI, pois une os polos ecléticos e especialistas.

  8. Software para mejorar la aplicación de técnicas cuantitativas en estudios prospectivos

    Directory of Open Access Journals (Sweden)

    Amaury Cabarcas Álvarez

    2013-06-01

    Full Text Available Durante las dos últimas décadas se ha observado preocupación de organizaciones para lograr competitividad y obtener estabilidad en el mercado, impulsándolas a analizar ventajas de ir a un futuro deseado, haciendo uso de herramientas como los estudios prospectivos. Con el fin de optimizar la aplicación de estudios prospectivos, se han desarrollado herramientas de apoyo que aún no abarcan ciertos intereses de los involucrados como el uso de recursos económicos, ambientales, tecnológicos y humanos. Para suplir la necesidad encontrada, se planteó un software que contribuya al acompañamiento de estudios prospectivos apoyándose de tecnologías Web 2.0 independientemente de técnicas utilizadas por la persona guía del mismo, para lograr racionalizar recursos aprovechando las ventajas que ofrece la web. La investigación permitió concluir que los estudios prospectivos constituyen una alternativa viable para las organizaciones que desean planificar para alcanzar sus objetivos empresariales. Sin embargo, el intento de lograr el futuro deseable traería una serie de costos, que se incrementarán cuando la aplicación de estos estudios se lleve a cabo al margen de las herramientas, software y modelos adecuados. Por esta razón, el hombre debe emplear herramientas tecnológicas que combinen métodos, software, capacidad colaborativa y de integración como la ofrecida por la Web 2.0 para optimizar sus procesos y permitir así, que áreas como la prospectiva, alcancen un alto nivel de eficiencia y masificación

  9. Interaction of Se and GaSe with Si(111)

    International Nuclear Information System (INIS)

    Meng, Shuang; Schroeder, B. R.; Olmstead, Marjorie A.

    2000-01-01

    Deposition of Se and GaSe on Si(111)7x7 surfaces was studied with low-energy electron diffraction, x-ray photoelectron spectroscopy, and x-ray photoelectron diffraction to probe initial nucleation and interface structure for GaSe/Si(111) heteroepitaxy. Room-temperature deposition of Se on Si(111)7x7 results in an amorphous film. Subsequent annealing leads to Se evaporation without ordering or interdiffusion. Se deposition at 450 degree sign C saturates at submonolayer coverage with no diffusion of Se into the substrate. There is no clear evidence of ordered sites for the Se. Growth of GaSe on Si(111)7x7 above 500 degree sign C results in a pseudomorphic bilayer, with Si-Ga-Se bonding. Additional GaSe does not stick to the bilayer above 525 degree sign C. The resulting Se lone pair at the surface leads to an ideally passivated surface similar to As/Si(111). This stable surface is similar to the layer termination in bulk GaSe. The single domain bilayer is oriented with the Ga-Se bond parallel to the substrate Si-Si bond. (c) 2000 The American Physical Society

  10. Open Source Projects in Software Engineering Education: A Mapping Study

    Science.gov (United States)

    Nascimento, Debora M. C.; Almeida Bittencourt, Roberto; Chavez, Christina

    2015-01-01

    Context: It is common practice in academia to have students work with "toy" projects in software engineering (SE) courses. One way to make such courses more realistic and reduce the gap between academic courses and industry needs is getting students involved in open source projects (OSP) with faculty supervision. Objective: This study…

  11. Double-Blind Review in Software Engineering Venues : The Community’s Perspective

    NARCIS (Netherlands)

    Bacchelli, A.; Beller, M.M.

    2017-01-01

    The peer review process is central to the scientific method, the advancement and spread of research, as well as crucial for individual careers. However, the single-blind review mode currently used in most Software Engineering (SE) venues is susceptible to apparent and hidden biases, since reviewers

  12. Modelo de capacitación en la línea de desarrollo de software de la empresa DESOFT (Training Approach for DESOFT software development

    Directory of Open Access Journals (Sweden)

    Antonio Roberto López López

    2014-05-01

    Full Text Available Resumen Para las empresas de desarrollo de software el capital intelectual constituye su activo más valioso, es por ello que la continua formación de sus recursos humanos, resulta imprescindible para lograr el éxito. El presente trabajo describe el modelo de capacitación en la línea de desarrollo de software implementado en la empresa DESOFT. Se enumeran las acciones de diagnóstico y de enseñanza realizadas, así como los resultados obtenidos. Abstract Nowadays, knowledge is an important asset for IT companies. Therefore, a continuing improvement of human resources is essential for success. This paper presents the training approach for developers involved on the new Desoft software project. Actions for making a diagnosis and carrying on training are described. Also, the results for the organization are showed.

  13. VizieR Online Data Catalog: SG1120-1202 members HST imaging & 24um fluxes (Monroe+, 2017)

    Science.gov (United States)

    Monroe, J. T.; Tran, K.-V. H.; Gonzalez, A. H.

    2017-09-01

    We employ HST imaging of an ~8'x12' mosaic across three filters: F390W (WFC3/UVIS), F606W (ACS/WFC), and F814W (ACS/WFC) for a total of 44 pointings (combined primary and parallels) during cycles 14 (GO 10499) and 19 (GO 12470). We use the Spitzer MIPS 24um fluxes from Saintonge+ (2008ApJ...685L.113S) and Tran+ (2009ApJ...705..809T). The 24um observations were retrieved from the Spitzer archive. For details on spectroscopy from multi-band ground-based observations using Magellan (in 2006), MMT, and VLT/VIMOS (in 2003), we refer the reader to Tran+ (2009ApJ...705..809T). (1 data file).

  14. Vantagens competitivas com softwares livres: o caso de uma instituição de ensino [doi: 10.5329/RECADM.20100901001

    Directory of Open Access Journals (Sweden)

    Luciana Helena Crnkovic

    2010-05-01

    Full Text Available Normal 0 21 false false false PT-BR X-NONE X-NONE VANTAGENS COMPETITIVAS COM SOFTWARES LIVRES: o caso de uma instituição de ensino   RESUMO O objetivo deste trabalho é investigar o processo de migração de softwares proprietários para softwares livres – SLs em um sistema de informação – SI em uma pequena empresa, no caso, uma instituição de ensino médio. O SI é um recurso fundamental e independe do porte ou ramo de atividade da empresa. Seu bom gerenciamento pode ser capaz de potencializar processos, gerar conhecimento e criar vantagens competitivas importantes. Contudo, o alto custo da aquisição de softwares proprietários é um grande obstáculo para sua implantação abrindo uma boa oportunidade de mercado para o SL, opção gratuita e com bom desempenho. Para investigar o processo de migração para SLs foi conduzido estudo de caso em uma cooperativa de ensino médio na qual pode-se observar o crescimento da importância do SI em sua operação. Na empresa em questão pode-se identificar, após a implantação dos SLs, um aumento da sinergia interdepartamental, maior dinamismo nas atividades por conta da eficiente obtenção das informações, e maior confiabilidade no SI no que se refere à segurança. No que se refere aos SLs pode-se observar claramente sua competitividade frente aos softwares proprietários.   Palavras-Chave tecnologia da informação; sistema de informação; software livre.     COMPETITIVE ADVANTAGES IN FREE SOFTWARE: THE CASE OF AN EDUCATIONAL INSTITUTION   ABSTRACT The objective of this study is to investigate the migration of proprietary software to free software - FS in an small businesses information system – SI, an institution of higher education. The SI is a key resource an is independent of size or area of the company activity. Its appropriated management may be able to improve process, generate knowledge and create significant competitive advantages. However, the high cost of purchasing

  15. Diseño del modelo integral colaborativo para el desarrollo ágil de software en las empresas de la zona centro-occidente en México

    OpenAIRE

    José Luis Cendejas Valdéz; Carlos Arturo Vega Lebrún; Anayansi Careta Isordia; Osvaldo Gutiérrez Sánchez; Heberto Ferreira Medina

    2014-01-01

    El principal problema en el desarrollo de software es generar aplicaciones que no acaban satisfaciendo las necesidades y objetivos de las organizaciones (clientes). El desarrollo de software en la actualidad no impacta directamente a los objetivos y metas que tienen planeadas las organizaciones, es decir el software se desarrolla por expertos de tecnologías de la información (TI) que se dedican a realizar los procesos de análisis, diseño y desarrollo para la creación de nuevas herramientas te...

  16. Sandia software guidelines: Software quality planning

    Energy Technology Data Exchange (ETDEWEB)

    1987-08-01

    This volume is one in a series of Sandia Software Guidelines intended for use in producing quality software within Sandia National Laboratories. In consonance with the IEEE Standard for Software Quality Assurance Plans, this volume identifies procedures to follow in producing a Software Quality Assurance Plan for an organization or a project, and provides an example project SQA plan. 2 figs., 4 tabs.

  17. Herramienta Software para Administrar el Desarrollo de Sitios Web Accesibles según Pautas WCAG 1.0

    OpenAIRE

    Juan I. Cavalieri; Pedro L. Alfonzo; Sonia I. a Mariño; Maria V. Godoy

    2016-01-01

    La accesibilidad a los contenidos web, es un campo en desarrollo y representa una manera de encarar proyectos con posibilidades de crecimiento y perdurabilidad en el tiempo. Por lo expuesto es relevante que los desarrolladores de software y las empresas, elaboren sitios accesibles, por lo cual el trabajo propuesto contribuye a esta temática. Se presenta una herramienta software orientada al análisis de las pautas WCAG 1.0, a ser utilizada en etapas tempranas de desarrollo de proyectos softwar...

  18. Software

    Energy Technology Data Exchange (ETDEWEB)

    Macedo, R.; Budd, G.; Ross, E.; Wells, P.

    2010-07-15

    The software section of this journal presented new software programs that have been developed to help in the exploration and development of hydrocarbon resources. Software provider IHS Inc. has made additions to its geological and engineering analysis software tool, IHS PETRA, a product used by geoscientists and engineers to visualize, analyze and manage well production, well log, drilling, reservoir, seismic and other related information. IHS PETRA also includes a directional well module and a decline curve analysis module to improve analysis capabilities in unconventional reservoirs. Petris Technology Inc. has developed a software to help manage the large volumes of data. PetrisWinds Enterprise (PWE) helps users find and manage wellbore data, including conventional wireline and MWD core data; analysis core photos and images; waveforms and NMR; and external files documentation. Ottawa-based Ambercore Software Inc. has been collaborating with Nexen on the Petroleum iQ software for steam assisted gravity drainage (SAGD) producers. Petroleum iQ integrates geology and geophysics data with engineering data in 3D and 4D. Calgary-based Envirosoft Corporation has developed a software that reduces the costly and time-consuming effort required to comply with Directive 39 of the Alberta Energy Resources Conservation Board. The product includes an emissions modelling software. Houston-based Seismic Micro-Technology (SMT) has developed the Kingdom software that features the latest in seismic interpretation. Holland-based Joa Oil and Gas and Calgary-based Computer Modelling Group have both supplied the petroleum industry with advanced reservoir simulation software that enables reservoir interpretation. The 2010 software survey included a guide to new software applications designed to facilitate petroleum exploration, drilling and production activities. Oil and gas producers can use the products for a range of functions, including reservoir characterization and accounting. In

  19. Software para la Evaluación y Selección de Generadores Independientes. Independent Generator Evaluation and Selection Software

    Directory of Open Access Journals (Sweden)

    Marcos Alberto de Armas Teyra

    2015-04-01

    Full Text Available En muchas industrias, edificios, empresas y servicios por razones productivas, emergentes o de confiablidad, es necesario generar energía eléctrica independientemente del Sistema Eléctrico Nacional. En otros casos se necesitan plantas de generación de energía eléctrica que puedan trabajar de forma aislada alimentando un circuito determinado. Para realizar la selección más económica y eficiente de la capacidad a instalar se debe tomar en consideración no sólo el comportamiento del sistema donde se va a insertar la unidad, sino también, las características operacionales del generador ante las fluctuaciones de la carga, sus límites operacionales y la estabilidad resultante. Este trabajo presenta un software que permite realizar la selección más adecuada considerando la curva de capacidad y la estabilidad del generador ante las particularidades del sistema. Con su aplicación es posible reducir los gastos y las pérdidas económicas debidas a una selección inapropiada. Como caso se presenta su aplicación a una planta de una fábrica de envases de alimentos.  In many industries, buildings and services is necessary to employ independent power plants to supply the electric power to a particular system. In other cases, islanded operation is desired due to several specific situations. In order to realize the most efficient, economic and adequate selection of the generator capacity is necessary to consider not only the systems load characteristic, also is necessary to know the limits of capabilities and the resultant stability of the power generator. This paper presents a software that allows to select the adequate generator, expose the operating limits and the resulting stability in fluctuating load condition. With its application is possible to reduce economic losses and the costs due to an impropriated generator selection with an oversized o sub utilized machine. As a case a 2500 kVA power plant is analyzed.

  20. Specification of problems from the business goals in the context of early software requirements elicitation

    Directory of Open Access Journals (Sweden)

    Carlos Mario Zapata-J.

    2014-01-01

    Full Text Available Una de las principales actividades de la educción temprana de requisitos de software es el reconocimiento y especificación de los problemas de la organización. Esta actividad tiene por objeto la definición de los requisitos iniciales y la satisfacción de las necesidades de los interesados. Estos problemas deben tener relación con los objetivos de la organización para lograr una aplicación de software contextualizada y alineada con la razón de ser de la organización. En los métodos de educción actuales basados en objetivos y problemas, las relaciones se detectan con la ayuda de la experiencia y conocimiento del analista y el interesado. Sin embargo aún no se logra trazabilidad entre objetivos y problemas. En este artículo se propone un método para la especificación de problemas a partir de objetivos organizacionales. Este método se compone de un conjunto de reglas sintácticas y semánticas que el analista usa para expresar los problemas a partir de las declaraciones de los objetivos. También, se presenta un ejemplo de laboratorio basado en el diagrama de objetivos de KAOS.

  1. Marco de integración de la usabilidad en el proceso de desarrollo software

    OpenAIRE

    Ferré Grau, Xavier

    2005-01-01

    En el desarrollo de software está incrementándose el reconocimiento de la usabilidad como atributo de calidad clave para el éxito de un producto. Sin embargo, las técnicas pertenecientes al campo de la IPO (Interacción Persona-Ordenador), las cuales nos permiten alcanzar un nivel adecuado de usabilidad en el producto software, se aplican en el marco de métodos IPO, y no en el proceso de desarrollo habitual. Por otra parte, la construcción de software según los métodos y prácticas de la IS (In...

  2. Assessment proposal of teaching and learning strategies in software process improvement

    Directory of Open Access Journals (Sweden)

    Bell Manrique-Losada

    2015-01-01

    Full Text Available En los ambientes de enseñanza y aprendizaje de mejora de procesos software se han incorporado nuevas estrategias para ayudar a disminuir debilidades actuales asociadas con la fundamentación en ciencias básicas, la motivación y la comunicación. Una de estas estrategias comprende el uso de principios de gamificación , los cuales buscan en el estudiante el desarrollo de competencias relacionadas con el trabajo en equipo, la resolución de problemas, el liderazgo y la comunicación efectiva. Para evaluar las estrategias de enseñanza y aprendizaje, es necesario considerar características como: i competencias de los estudiantes; ii propuestas y técnicas didácticas; y iii niveles de satisfacción de los estudiantes respecto al proceso de enseñanza. En este artículo se presenta una propuesta de evaluación de estrategias de enseñanza/aprendizaje en mejora de procesos de software, junto con un método de validación preliminar basado en principios de gamificación . Finalmente, se presenta un caso de estudio para validar la propuesta didáctica, como piloto de la propuesta de evaluación.

  3. Especificación de Requerimientos para el Desarrollo de Software Automotriz en México

    Directory of Open Access Journals (Sweden)

    Jorge R. Aguilar Cisneros

    2015-12-01

    Full Text Available Actualmente, dentro del sector automotriz, México es reconocido a nivel mundial, como un excelente país ensamblador, sin embargo, países como Alemania, Estados Unidos y Japón, entre otros, son reconocidos mundialmente además de ensambladores como países innovadores de éste sector. Bajo este escenario, se propone que México incursione en la investigación e innovación automotriz, particularmente, en el área de desarrollo de sistemas de software automotriz embebido tanto críticos como no críticos. Para llevar a cabo esta propuesta, en este artículo se presenta la situación del desarrollo de software automotriz en México, así como una revisión de los principales modelos de ciclo de vida, estándares y herramientas utilizadas en la construcción de sistemas de software automotriz embebido. De manera particular, presentamos la especificación de requerimientos para el sector automotriz, como un área inicial de atención.

  4. Análisis de los discursos de los alumnos del Grado de Publicidad y Relaciones Públicas del Campus María Zambrano, con respecto al software

    OpenAIRE

    Aguilar García, Alberto

    2017-01-01

    Este trabajo de fin de grado presenta un análisis del discurso de los alumnos del Campus María Zambrano que estudian el grado de Publicidad y Relaciones Públicas. En este proyecto se plantea las cuestiones referidas a la imagen mental de dichos alumnos acerca de los distintos software, el hardware que se utiliza hoy en día, de las licencias que se adquieren, y de las marcas que se pagan. A grandes rasgos es una revisión crítica y un análisis racional de las distintas utilidades del software d...

  5. PROPUESTA PARA INCORPORAR EVALUACIÓN Y PRUEBAS DE USABILIDAD DENTRO DE UN PROCESO DE DESARROLLO DE SOFTWARE PROPOSTA PARA INCORPORAR A AVALIAÇÃO E PROVAS DE USABILIDADE DENTRO DE UM PROCESSO DE DESENVOLVIMENTO DE SOFTWARE PROPOSAL FOR INTRODUCING USABILITY EVALUATION AND TESTING WITHIN A SOFTWARE DEVELOPMENT PROCESS

    Directory of Open Access Journals (Sweden)

    Beatriz E Florián

    2010-07-01

    Full Text Available La usabilidad es crítica para el éxito de los sistemas de software interactivos. Las pruebas y evaluaciones de usabilidad durante el desarrollo del producto han ganado amplia aceptación como estrategia para mejorar la calidad del producto. La introducción temprana de las perspectivas de usabilidad en un producto es muy importante para brindar una clara visibilidad de aspectos de calidad, tanto para los desarrolladores como los usuarios de pruebas. Sin embargo, la evaluación y pruebas de usabilidad no es común que se tomen en cuenta como elementos indispensables del proceso de desarrollo de software. Este artículo expone una propuesta para introducir la evaluación y pruebas de usabilidad dentro de un desarrollo de software, basándose en la reutilización de artefactos de software. Adicionalmente, propone la introducción de un auditor dentro de la clasificación de actores para las pruebas de usabilidad y una mejora de las listas de chequeo utilizadas para evaluación heurística, agregándoles aspectos cuantitativos y cualitativos.A usabilidade é crítica para o sucesso dos sistemas de software interativos. As provas e avaliações de usabilidade durante o desenvolvimento do produto têm ganhado ampla aceitação como estratégia para melhorar a qualidade do produto. A introdução adiantada das perspectivas de usabilidade em um produto é muito importante para brindar uma clara visibilidade de aspectos de qualidade tanto para os desenvolvedores como os usuários de provas. No entanto, a avaliação e provas de usabilidade não é comum que se tomem em conta como elementos indispensáveis do processo de desenvolvimento de software. Este artigo expõe uma proposta para introduzir avaliação e provas de usabilidade dentro de um desenvolvimento de software, baseando-se na reutilização de artefatos de software. Adicionalmente, propõe a introdução de um auditor dentro da classificação de atores para as provas de usabilidade e uma

  6. Large-Scale Star Formation-Driven Outflows at 13D-HST Survey

    Science.gov (United States)

    Lundgren, Britt; Brammer, G.; Van Dokkum, P. G.; Bezanson, R.; Franx, M.; Fumagalli, M.; Momcheva, I. G.; Nelson, E.; Skelton, R.; Wake, D.; Whitaker, K. E.; da Cunha, E.; Erb, D.; Fan, X.; Kriek, M.; Labbe, I.; Marchesini, D.; Patel, S.; Rix, H.; Schmidt, K.; van der Wel, A.

    2013-01-01

    We present evidence of large-scale outflows from three low-mass star-forming galaxies observed at z=1.24, z=1.35 and z=1.75 in the 3D-HST Survey. Each of these galaxies is located within a projected physical distance of 60 kpc around the sight line to the quasar SDSS J123622.93+621526.6, which exhibits well-separated strong (W>0.8A) MgII absorption systems matching precisely to the redshifts of the three galaxies. We derive the star formation surface densities from the H-alpha emission in the WFC3 G141 grism observations for the galaxies and find that in each case the star formation surface density well-exceeds 0.1 solar mass / yr / kpc^2, the typical threshold for starburst galaxies in the local Universe. From a small but complete parallel census of the 0.650.8A MgII covering fraction of star-forming galaxies at 10.4A MgII absorbing gas around star-forming galaxies may evolve from 2 to the present, consistent with recent observations of an increasing collimation of star formation-driven outflows with time from 3.

  7. MAPS-15504 - Uma metodologia automatizada para avaliação de processo de software

    Directory of Open Access Journals (Sweden)

    Itana Maria de Souza Gimenes

    2000-05-01

    Full Text Available Devido às crescentes exigências por qualidade, a comunidade de engenharia de software tem produzido diversas normas e apresentado diversas abordagens sobre a qualidade dos produtos e processos de software. Grande parte dessas normas são aplicadas ao processo de software, dentre os quais se destacam pela larga utilização a ISO 9000-3, a ISO 12207, o CMM e o ISO/IEC TR 15504 (resultado dos trabalhos do projeto SPICE. Outro resultado das pesquisas da comunidade de engenharia de software são os ambientes de engenharia de software centrados em processo (PSEE, os quais visam à automação do processo de software. Este artigo apresenta MAPS-15504, uma metodologia automatizada para avaliação da qualidade do processo de software baseada no ISO/IEC TR 15504. A metodologia de avaliação de processo de software foi aplicada a um estudo de caso e implementada no ambiente do ExPSEE, um ambiente experimental desenvolvido no Departamento de Informática (DIN da Universidade Estadual de Maringá (UEM

  8. Mecanismos evaluables con dinámica de sistemas, utilizables en desarrollo de software libre para gestión de cooperación

    Directory of Open Access Journals (Sweden)

    Laura Cristina Villamizar Vecino

    2013-12-01

    Full Text Available Presenta una revisión de la literatura sobre los mecanismos de cooperación utilizables en la gestión de la cooperación en proyectos de desarrollo de software libre, así como las bases teóricas acerca de la cooperación, y la posibilidad de su estudio mediante dinámica de sistemas. Se concluye que se requieren lineamientos y estrategias aplicables a metodologías de desarrollo de software, para realizar una gestión efectiva de la cooperación y así evitar los dilemas sociales que pueden afectar la producción de este tipo de software.

  9. Fundamentación matemática de un software para calcular valores regionales de variables respiratorias

    Directory of Open Access Journals (Sweden)

    Antonio Barber Gutiérrez

    1996-12-01

    Full Text Available Por el interés de conocer los valores regionales de las variables respiratorias más útiles en clínica, se presenta la fundamentación matemática de un software que cuantifica imágenes pulmonares obtenidas en gamma-cámara. La distribución del isótopo se convierte en 16 valores regionales de la función pulmonar. El software evalúa las imágenes partiendo de la relación actividad del isótopo contra tiempo y la incorporación de los datos adicionales siguientes: 1. CRF (capacidad residual funcional del pulmón; 2. comienzo de la inyección radiactiva (t o; 3. gasto cardíaco (GC; 4. frecuencia del pulso (f 5. presión barométrica (P B; 6. fracción de oxígeno atmosférico (F IO 2. En el trabajo se identifican las siglas médicas usadas y se da una introducción fisiológica sobre cada variable respiratoria.As a result of the existing interest for knowing the regional values of the most useful respiratory variables in clinics, it is presented the mathematical foundation of a software that quantifies pulmonary images obtained in gamma-camera. The isotope distribution becomes into 16 regional values of the pulmonary function. The software evaluates the images starting from the relation isotope activity against time, and the incorporation of the following additional data: 1, FRC (functional residual capacity of the lung; 2. beggining of radioactive injection (t o; 3. cardiac output (CO; 4. pulse frequency (f; 5. barometric pressure (Pb ; 6. atmospheric oxygen fraction (F10 2. The medical acronyms used are identified in this paper and a physiological introduction on every respiratory variable is given.

  10. Examining software complexity and quality for scientific software

    International Nuclear Information System (INIS)

    Kelly, D.; Shepard, T.

    2005-01-01

    Research has not found a simple relationship between software complexity and software quality, and particularly no relationship between commonly used software complexity metrics and the occurrence of software faults. A study with an example of scientific software from the nuclear power industry illustrates the importance of addressing cognitive complexity, the complexity related to understanding the intellectual content of the software. Simple practices such as aptly-named variables contributes more to high quality software than limiting code sizes. This paper examines the research into complexity and quality and reports on a longitudinal study using the example of nuclear software. (author)

  11. Galaxy Mass Assembly with VLT & HST and lessons for E-ELT/MOSAIC

    Science.gov (United States)

    Hammer, François; Flores, Hector; Puech, Mathieu

    2015-02-01

    The fraction of distant disks and mergers is still debated, while 3D-spectroscopy is revolutionizing the field. However its limited spatial resolution imposes a complimentary HST imagery and a robust analysis procedure. When applied to observations of IMAGES galaxies at z = 0.4-0.8, it reveals that half of the spiral progenitors were in a merger phase, 6 billion year ago. The excellent correspondence between methodologically-based classifications of morphologies and kinematics definitively probes a violent origin of disk galaxies as proposed by Hammer et al. (2005). Examination of nearby galaxy outskirts reveals fossil imprints of such ancient merger events, under the form of well organized stellar streams. Perhaps our neighbor, M31, is the best illustration of an ancient merger, which modeling in 2010 leads to predict the gigantic plane of satellites discovered by Ibata et al. (2013). There are still a lot of discoveries to be done until the ELT era, which will open an avenue for detailed and accurate 3D-spectroscopy of galaxies from the earliest epochs to the present.

  12. Product-oriented Software Certification Process for Software Synthesis

    Science.gov (United States)

    Nelson, Stacy; Fischer, Bernd; Denney, Ewen; Schumann, Johann; Richardson, Julian; Oh, Phil

    2004-01-01

    The purpose of this document is to propose a product-oriented software certification process to facilitate use of software synthesis and formal methods. Why is such a process needed? Currently, software is tested until deemed bug-free rather than proving that certain software properties exist. This approach has worked well in most cases, but unfortunately, deaths still occur due to software failure. Using formal methods (techniques from logic and discrete mathematics like set theory, automata theory and formal logic as opposed to continuous mathematics like calculus) and software synthesis, it is possible to reduce this risk by proving certain software properties. Additionally, software synthesis makes it possible to automate some phases of the traditional software development life cycle resulting in a more streamlined and accurate development process.

  13. El software libre en la educación colombiana Análisis de herramientas

    Directory of Open Access Journals (Sweden)

    Julián Alberto Monsalve Pulido

    2011-05-01

    Full Text Available Este artículo tiene como objetivo hacer un análisis de la utilización de software libre en la educación en América Latina, la evolución y qué herramientas se pueden usar para dar cumplimiento al plan TIC impulsado por el gobierno nacional, para el caso de Colombia. Lo anterior llevaría a tener un análisis del proceso tecnológico que cualquier entidad educati- va puede tomar para lograr todos los objetivos académicos y tecnológicos. En cada uno de los parámetros analizados se concluye que el software libre es la oportunidad que tiene Colombia para evolucionar en la parte educativa en la implementación de las TIC.

  14. LOS CASOS DE PRUEBA EN LA PRUEBA DEL SOFTWARE

    Directory of Open Access Journals (Sweden)

    JOSÉ LUIS ARISTEGUI

    2010-01-01

    Full Text Available En el campo de la gestión tradicional de proyectos de software, surgió hace poco una filosofía estratégica que se centra en mejorar el diseño de los casos de prueba, y que llamó la atención generalizada de los interesados en la gestión de proyectos y en la prueba del software.Actualmente, la gestión de proyectos de software es una de las tareas más importantes en la industria de las tecnologías de la información, ymás aún si el objetivo es desarrollar productos de calidad. En esa gestión, la prueba es una de las fases más importantes, y en ésta, lo que requieremás cuidado y dedicación es el diseño de los casos de prueba, por lo que es necesario estudiar cómo diseñarlos y escribirlos mejor.

  15. A concept of software testing for SMART MMIS software

    International Nuclear Information System (INIS)

    Seo, Yong Seok; Seong, Seung Hwan; Park, Keun Ok; Hur, Sub; Kim, Dong Hoon

    2001-01-01

    In order to achieve high quality of SMART MMIS software, the well-constructed software testing concept shall be required. This paper established software testing concept which is to be applied to SMART MMIS software, in terms of software testing organization, documentation. procedure, and methods. The software testing methods are classified into source code static analysis and dynamic testing. The software dynamic testing methods are discussed with two aspects: white-box and black-box testing. As software testing concept introduced in this paper is applied to the SMART MMIS software. the high quality of the software will be produced. In the future, software failure data will be collected through the construction of SMART MMIS prototyping facility which the software testing concept of this paper is applied to

  16. Taller de Software Libre para el diseño de materiales

    OpenAIRE

    Álvarez Navia, Iván

    2008-01-01

    Materiales de clase: 1.Tema 1: Introducción al Software Libre; 2. Tema 2: Sistema GNU/Linux: Instalación de la distribución OpenSuse 11.1; 3. Tema 3: El escritorio en GNU/Linux: Introducción al sistema X-Window, GNOME, KDE yOpenOffice; 4. Tema 4: Administración avanzada de OpenSuse con Yast. El objetivo fundamental del taller consiste en adquirir soltura en la instalación, administración y utilización de Software Libre disponible en el ámbito educativo. Así mismo se proporciona una visión ...

  17. The HST Key Project on the Extragalactic Distance Scale. XV. A Cepheid Distance to the Fornax Cluster and Its Implications

    OpenAIRE

    Madore, Barry F.; Freedman, Wendy L.; Silbermann, N.; Harding, Paul; Huchra, John; Mould, Jeremy; Graham, John; Ferrarese, Laura; Gibson, Brad; Han, Mingsheng; Hoessel, John; Hughes, Shaun; Illingworth, Garth; Phelps, Randy; Sakai, Shoko

    1998-01-01

    Using the Hubble Space Telescope (HST) 37 long-period Cepheid variables have been discovered in the Fornax Cluster spiral galaxy NGC 1365. The resulting V and I period-luminosity relations yield a true distance modulus of 31.35 +/- 0.07 mag, which corresponds to a distance of 18.6 +/- 0.6 Mpc. This measurement provides several routes for estimating the Hubble Constant. (1) Assuming this distance for the Fornax Cluster as a whole yields a local Hubble Constant of 70 +/-18_{random} [+/-7]_{syst...

  18. Maturity Model of Software Product with Educational Maturity Model

    OpenAIRE

    R.Manjula; J.Vaideeswaran

    2011-01-01

    Software product line engineering is an inter-disciplinary concept. It spans the dimensions of business, architecture, process,and the organization. Similarly, Education System engineering is also an inter-disciplinary concept, which spans the dimensions of academic, infrastructure, facilities, administration etc. Some of the potential benefits of this approach includecontinuous improvements in System quality and adhering to global standards. The increasing competency in IT and Educational Se...

  19. Inovação, cooperação e aprendizado no setor de software no Brasil: análise exploratória baseada no conceito de Arranjos Produtivos Locais (APLs Innovation, cooperation and learning in the Brazilian software industry: exploratory analysis based on the concept of local productive systems (LPSs

    Directory of Open Access Journals (Sweden)

    Jorge Britto

    2010-08-01

    Full Text Available O artigo procura articular a discussão sobre o processo de construção de competências na produção de software no Brasil à distribuição espacial dessas atividades, utilizando para isso um referencial analítico baseado no conceito de "arranjos produtivos locais" (APLs, no qual ressalta-se a importância da dimensão local-institucional para o aprofundamento de diferentes formas de aprendizado e para o reforço do potencial inovativo e da competitividade industrial. A análise realizada desdobra-se em cinco seções. A primeira seção apresenta uma caracterização geral do setor e do referencial analítico utilizado. A segunda seção apresenta um panorama sintético da evolução do setor de software no Brasil no período recente. A terceira seção procura discutir aspectos relacionados à distribuição espacial da indústria, com base em informações secundárias. A quarta seção desenvolve uma análise exploratória sobre a heterogeneidade espacial da indústria, utilizando informações primárias sobre arranjos produtivos dedicados à produção de software, as quais são trabalhadas através de técnicas de estatística multivariada, visando identificar diferentes padrões relativos a processos de aprendizado e inovação existentes nesses arranjos. Uma última seção sintetiza as principais conclusões do trabalho.The analysis seeks to explore analytical and methodological issues associated to the study of learning, innovation and competence building in Brazilian software industry. Contrasting with a strictly sectoral focus, our hypothesis is that the territorial proximity plays an important role to the improvement of learning and to the strengthening of firms' competitiveness and innovativeness. The analysis uses the concept of "local productive systems" in order to capture the importance of local and institutional conditions to the improvement of learning and to the strengthening of innovativeness and competitiveness. The

  20. A construção de um software educativo sobre ausculta dos sons respiratórios La construcción de un software educativo sobre la auscultación de los sonidos respiratórios Building an educational software about the auscultation of breathing sounds

    Directory of Open Access Journals (Sweden)

    Francisca Nellie de Paula Melo

    2006-12-01

    Full Text Available O estudo objetivou relatar a experiência da construção de um software educativo sobre a ausculta dos sons respiratórios. Nesse processo, aplicou-se o referencial pedagógico de Lev Semenovic Vygotsky, e delimitou-se o conteúdo de modo a abarcar o método da ausculta passo a passo, as finalidades, a classificação dos sons normais e adventícios e as respectivas características estetoacústicas. Para o desenvolvimento do sistema, foi utilizada a tecnologia 3D, incluindo avatares (personificações virtuais do paciente, do enfermeiro e dos objetos e ambiente virtual para a ausculta, usando procedimentos de simulação. Ao final do processo, concluiu-se que iniciativas dessa natureza, embora sejam permeadas de dificuldades, trazem contribuições importantes ao ensino-aprendizagem de conteúdos relativos à área da Enfermagem.En este estudio se tuvo como objetivo relatar la experiencia de la construcción de un software educativo sobre la auscultación de los sonidos respiratorios. En ese proceso, se aplicó el referencial pedagógico de Lev Semenovic Vygotsky y se delimitó el contenido de modo a abarcar el método de la auscultación paso a paso, las finalidades, la clasificación de los sonidos normales y casuales y las respectivas características estetoacústicas. Para el desarrollo del sistema, fue utilizada la tecnología 3D, incluyendo avatares (personificaciones virtuales del paciente, del enfermero y de los objetos y ambiente virtual para la auscultación, usando procedimientos de simulación. Al final del proceso, se concluyó que iniciativas de esa naturaleza, aún con dificultades presentes, traen contribuciones importantes para la enseñanza-aprendizaje de contenidos relativos al área de la Enfermería.The aim of this study was to discuss the experience of building an educational software about the auscultation of breathing sounds. In the process, Lev Semenovic Vygotsky's pedagogic theoretical framework was used, and the

  1. Alinhando objetivos estratégicos e processo de desenvolvimento em empresas de software Aligning strategic objectives and development practices at software companies

    Directory of Open Access Journals (Sweden)

    André Leme Fleury

    2013-01-01

    Full Text Available Sistemas de software são atualmente responsáveis por parte significativa das inovações tecnológicas viabilizadas em produtos e serviços. A história do software é recente, assim como são recentes as pesquisas sobre o tema, que tem como foco principal o aprimoramento dos seus processos de desenvolvimento. Apesar das contribuições trazidas por essas teorias, a questão do alinhamento entre objetivos estratégicos e o processo de desenvolvimento nas empresas de software considerando as suas principais capacidades produtivas permanece um tema inexplorado. Como consequência, técnicas da engenharia de software são aplicadas sem incorporar considerações de valor nos processos de análise e na tomada de decisões. Este artigo analisa e apresenta soluções para duas questões: como diferenciar as empresas de software de acordo com seus processos produtivos mais relevantes e como garantir que esses processos de desenvolvimento encontram-se alinhados com os objetivos do negócio. A abordagem resultante inclui um referencial para classificação de empresas de software e uma técnica de planejamento tecnológico para essas empresas. O projeto de pesquisa incluiu a realização de surveys, pesquisa-ação e estudos de caso.Software systems are currently responsible for a significant part of the technological innovations introduced in products and services. software history is recent and research concerning software usually aims to improve process capabilities. Despite the contributions of these theories, questions concerning the alignment between strategic objectives and development process at software companies considering their most important capabilities have not been clarified. Consequently, software engineering techniques are applied without value considerations for analysis and decision. This paper analyses and proposes solutions for two issues: how to differentiate software companies according with their most relevant development

  2. Extended analyses of Se VII and Se VIII

    International Nuclear Information System (INIS)

    Vankleef, Th.A.M.; Joshi, Y.N.

    1984-01-01

    Joshi et al. (1984) have conducted an analysis of the 3d8 4s-3d8 4p transitions in As VII. The present investigation is concerned with an analysis of similar transitions in Se VIII. The selenium spectrum was photographed in the 400-1200-A wavelength region on a variety of normal-incidence spectrographs. Attention is given to least-squares-fit (LSF) and Hartree-Fock (HF) parameter values for the 3d9 4d configuration of Se VII, LSF and HF parameter values for the 3d8 4s and 3d8 4p configurations of Se VIII, the energy and composition of the levels of the 3d9 4d configuration of Se VII, classified lines in Se VII, energy levels and composition of the 3d8 4s configuration and the revised and newly determined levels of the 3d8 4p configuration of Se VIII, and newly classified lines of Se VIII. 15 references

  3. Agile human centered methodologies to develop educational software

    Directory of Open Access Journals (Sweden)

    Carina S. González-González

    2015-01-01

    Full Text Available Este artículo presenta una propue sta metodológica basada en los enfoques actuales del proceso d e desarrollo de software: las m etodologías ágiles (SCRUM, centradas en el usuario (UCD y el diseño de ex periencia de usuario (UXDy Lean UX. Así, hemos adaptado alguna s de las características de las metodologías ágiles que nos han perm itido producir prototipos centrados en los usuarios con retroal imentación constante de ellos. El objetivo principal de esta propuesta es identificar problemas de usabilidad y factores UX en las primer as etapas de desarrollo de software educativo. Además, hemos aplicado y vali dado esta propuesta en el marco de un proyecto de software educ ativo para los usuarios con necesidades educativas especiales. La met odología propuesta puede ser una buena filosofía de diseño a se guir en los proyectos de desarrollo de softwa re en general, y en proyectos educativos en particular.

  4. Herramienta para la evaluación y mejora del proceso de software en pequeñas organizaciones.

    OpenAIRE

    Moralejo, Raúl O.; Cabo, José M.; Dumit Muñoz, Nerina Claudia; Mercado, Gustavo; Navarría, Salvador; Barrionuevo, María Luján; Carrillo Castillo, Celeste; Palá Caso, Lisandro

    2008-01-01

    En los últimos años han aparecido un gran número de estándares y propuestas internacionales y regionales relacionadas con mejora de procesos software (SPI) para micro y pequeñas empresas software (VSEs). Esto evidencia el creciente interés en la comunidad de Ingeniería de Software en abordar el tema de SPI para VSEs. Este creciente interés se suscita porque la industria del software en la mayoría de los países está formada en gran parte por este tipo de empresas. Es importante entonces fortal...

  5. R PROJECT: SU APLICACIÓN COMO SOFTWARE LIBRE PARA ANÁLISIS EN COMPONENTES PRINCIPALES

    Directory of Open Access Journals (Sweden)

    Fabricio Bolaños Guerrero

    2011-01-01

    Full Text Available Este artículo es producto de un proyecto de investigación realizado en colaboración con profesores de la Escuela de Matemáticas de la Universidad de Costa Rica (UCR, para dar a conocer una opción de software estadístico llamado R Project. Con este paquete es posible hacer Análisis en Componentes Principales (ACP y representar los resultados usando el Plano Principal y el Círculo de Correlaciones, como herramientas para poder realizar una mejor interpretación de los datos de la tabla (individuos y variables. El software R es de distribución libre, su implementación es sencilla y no requiere de mayores recursos informáticos. Dentro de sus diversas aplicaciones está el ACP, que es una herramienta que se utiliza para la interpretación de la información presentada en una tabla de datos cuantitativos; por lo tanto, las personas investigadoras de diferentes áreas tienen una opción económica y sencilla para realizar Análisis de Datos. Se llevan a cabo dos ejemplos de ACP, donde se muestra un posible uso de la herramienta y se dan las instrucciones sobre cómo realizarlo paso a paso.

  6. Análise da aplicação do software SEPIADES para um acervo fotográfico Análisis de la aplicación de software SEPIADES en una colección fotográfica

    Directory of Open Access Journals (Sweden)

    Daniel Flores

    2010-09-01

    Full Text Available Este trabalho propõe a aplicação do software SEPIADES (Safeguarding European Photographic Images for Access Data Element Set no acervo fotográfico do Avenida Tênis Clube (ATC visando a instrumentalização de um mecanismo de busca e acondicionamento apropriado para as fotografias digitais e analógicas do acervo fotográfico do ATC. Com a utilização de procedimentos técnicos, a pesquisa de estudo de caso foi utilizada, pois envolveu o estudo profundo e exaustivo de objetos como fotografias e o software SEPIADES, permitindo o seu amplo e detalhado conhecimento. Isso exigiu uma revisão de conceitos e teorias arquivísticas, o entendimento da entidade, sua história, estrutura e funcionamento, assim como, compreender o funcionamento do software, seus pontos positivos e negativos, dos quais pode-se citar: (a pontos positivos: open source (software livre, facilidade de se observar a hierarquia, descrição multinível, diversidade dos campos para descrição, interface gráfica de fácil compreensão pelo usuário final e gravação dos dados automaticamente; (b pontos negativos: data e hora do registro dos dados, campo status (aprovado ou não aprovado, OAI (Open Archives Initiative encontra-se em fase experimental, search (busca, imagem física (imagem thumbnail de difícil visualização para detalhes da fotografia e ausência da opção de impressão.

  7. The Ag2Se-HgSe-GeSe2 system and crystal structures of the compounds

    International Nuclear Information System (INIS)

    Parasyuk, O.V.; Gulay, L.D.; Romanyuk, Ya.E.; Olekseyuk, I.D.; Piskach, L.V.

    2003-01-01

    The phase diagram of the quasi-ternary Ag 2 Se-HgSe-GeSe 2 system at 298 K was investigated using X-ray phase analysis and metallography. The formation of five intermediate quaternary phases β (Ag ∼7.12-∼6.32 Hg ∼0.44-∼0.82 GeSe 6 ), γ (Ag ∼6.08-∼4.00 Hg ∼0.96-∼2.00 GeSe 6 ), δ (Ag 3.4 Hg 2.3 GeSe 6 ), ε (Ag ∼2.24-∼2.00 Hg ∼2.88-∼3.00 GeSe 6 ) and ∼Ag 1.4 Hg 1.3 GeSe 6 was established. The crystal structure of the β-phase (for the Ag 6.504 Hg 0.912 GeSe 6 composition) was determined using X-ray single crystal diffraction. It crystallizes in a cubic structure (space group F4-bar 3m) with the lattice parameter a=1.09026(4) nm. The crystal structure of the δ-phase (Ag 3.4 Hg 2.3 GeSe 6 ) was determined using X-ray powder diffraction (space group F4-bar 3m, a=1.07767(8) nm). The crystal structure determination of the γ-phase (space group Pmn2 1 ) was performed for the compositions Ag 5.6 Hg 1.2 GeSe 6 , Ag 4.8 Hg 1.6 GeSe 6 and Ag 4 Hg 2 GeSe 6 using X-ray powder diffraction. The crystal structure of the LT-Hg 2 GeSe 4 compound (space group I4-bar , a=0.56786(2), c=1.12579(5) nm) was confirmed by powder diffraction also.

  8. The sluggs survey: HST/ACS mosaic imaging of the NGC 3115 globular cluster system

    Energy Technology Data Exchange (ETDEWEB)

    Jennings, Zachary G.; Romanowsky, Aaron J.; Brodie, Jean P.; Arnold, Jacob A. [University of California Observatories, Santa Cruz, CA 95064 (United States); Strader, Jay [Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan, MI 48824 (United States); Lin, Dacheng; Irwin, Jimmy A.; Wong, Ka-Wah [Department of Physics and Astronomy, University of Alabama, Box 870324, Tuscaloosa, AL 35487 (United States); Sivakoff, Gregory R., E-mail: zgjennin@ucsc.edu [Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1 (Canada)

    2014-08-01

    We present Hubble Space Telescope/Advanced Camera for Surveys (HST/ACS) g and z photometry and half-light radii R {sub h} measurements of 360 globular cluster (GC) candidates around the nearby S0 galaxy NGC 3115. We also include Subaru/Suprime-Cam g, r, and i photometry of 421 additional candidates. The well-established color bimodality of the GC system is obvious in the HST/ACS photometry. We find evidence for a 'blue tilt' in the blue GC subpopulation, wherein the GCs in the blue subpopulation get redder as luminosity increases, indicative of a mass-metallicity relationship. We find a color gradient in both the red and blue subpopulations, with each group of clusters becoming bluer at larger distances from NGC 3115. The gradient is of similar strength in both subpopulations, but is monotonic and more significant for the blue clusters. On average, the blue clusters have ∼10% larger R {sub h} than the red clusters. This average difference is less than is typically observed for early-type galaxies but does match that measured in the literature for the Sombrero Galaxy (M104), suggesting that morphology and inclination may affect the measured size difference between the red and blue clusters. However, the scatter on the R {sub h} measurements is large. We also identify 31 clusters more extended than typical GCs, which we term ultra-compact dwarf (UCD) candidates. Many of these objects are actually considerably fainter than typical UCDs. While it is likely that a significant number will be background contaminants, six of these UCD candidates are spectroscopically confirmed as NGC 3115 members. To explore the prevalence of low-mass X-ray binaries in the GC system, we match our ACS and Suprime-Cam detections to corresponding Chandra X-ray sources. We identify 45 X-ray-GC matches: 16 among the blue subpopulation and 29 among the red subpopulation. These X-ray/GC coincidence fractions are larger than is typical for most GC systems, probably due to the increased

  9. Ingeniería de Usabilidad. Una Propuesta Tecnológica para Contribuir a la Evaluación de la Usabilidad del Software

    Directory of Open Access Journals (Sweden)

    Maximiliano A.Mascheroni

    2013-08-01

    Full Text Available La usabilidad es un atributo intangible del software, por lo tanto, es difícil de visualizar, medir y reconocer como un factor determinante de su calidad. La Ingeniería de Usabilidad (IU promueve la evaluación temprana de la usabilidad en el proceso de desarrollo de software y la participación del usuario en todas las fases del ciclo de vida. Para conocer el grado de importancia que le conceden a la usabilidad las pequeñas empresas, se realizó un estudio exploratorio en pymes de software del nordeste argentino, enfocado en dos aspectos principales: la participación del usuario y las técnicas de usabilidad que se utilizan. Los resultados indican que si bien las empresas no desconocen la importancia de la usabilidad en la calidad del software, las prácticas promovidas por la IU no se encuentran incorporadas en la mayoría de los procesos de desarrollo. En este trabajo se presenta una propuesta tecnológica para evaluar la usabilidad durante el proceso de desarrollo, mediante cuestionarios que recaban y ponderan la percepción de los usuarios y otros que comprueban el cumplimiento de los estándares y criterios heurísticos, con el objetivo de permitir a las empresas evaluar el cumplimiento de las recomendaciones vigentes en cuanto a criterios de usabilidad.

  10. UV, X-ray, and Optical Variability of the Young Star T Cha Produced by Inner Disk Obscuration: Results from a Coordinated HST, XMM-Newton, LCOGT, and SMARTS Observing Campaign

    Science.gov (United States)

    Brown, Alexander; France, Kevin; Walter, Frederick M.; Schneider, P. Christian; Brown, Timothy M.; Andrews, Sean M.; Wilner, David J.

    2018-06-01

    The young (7 Myr) 1.5 solar mass T Tauri star T Chamaeleontis shows dramatic variability. The optical extinction varies by at least 3 magnitudes on few hour time-scales with no obvious periodicity. The obscuration is produced by material at the inner edge of the circumstellar disk and therefore characterizing the absorbing material can reveal important clues regarding the transport of gas and dust within such disks. The inner disk of T Cha is particularly interesting, because T Cha has a transitional disk with a large gap at 0.2-15 AU in the dust disk and allows study of the gas and dust structure in the terrestrial planet formation zone during this important rapid phase of protoplanetary disk evolution. For this reason we have conducted a major multi-spectral-region observing campaign to study the UV/X-ray/optical variability of T Cha. During 2018 February/March we monitored the optical photometric and spectral variability using LCOGT (Chile/South Africa/Australia) and the SMARTS telescopes in Chile. These optical data provide a broad context within which to interpret our shorter UV and X-ray observations. We observed T Cha during 3 coordinated observations (each 5 HST orbits + 25 ksec XMM; on 2018 Feb 22, Feb 26, Mar 2) using the HST COS/STIS spectrographs to measure the FUV/NUV spectra and XMM-Newton to measure the corresponding X-ray energy distribution. The observed spectral changes are well correlated and demonstrate the influence of the same absorbing material in all the spectral regions observed. By examining which spectral features change and by how much we can determine the location of different emitting regions relative to the absorbers along the line-of-sight to the star. In this poster we provide an overview of the variability seen in the different spectral regions and quantify the dust and gas content of T Cha's inner disk edge.(This work is supported by grant HST-GO-15128 and time awarded by HST, XMM-Newton, LCOGT, and SMARTS. We acknowledge the

  11. Metodología de diseño, desarrollo y evaluación de software para juegos de guerra.

    OpenAIRE

    Carrillo Andrade, Pablo Jacinto; Ortega Gutiérrez, Luis Eduardo

    2012-01-01

    La presente tesis realiza una contribución en cuanto al diseño, el desarrollo y la evaluación del software para juegos de guerra simulados. La construcción del software según los métodos y prácticas de la Ingeniería del Software (IS) trata de forma variada el proceso de desarrollo, la metodología que se propone deberá ayudar a los ingenieros de software a seleccionar las técnicas y metodologías que serán aplicables a los procesos de construcción del software para juegos de guerra en sus disti...

  12. Software Maintenance and Evolution: The Implication for Software ...

    African Journals Online (AJOL)

    Software Maintenance and Evolution: The Implication for Software Development. ... Software maintenance is the process of modifying existing operational software by correcting errors, ... EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT

  13. Hα Equivalent Widths from the 3D-HST survey: evolution with redshift and dependence on stellar mass†

    Science.gov (United States)

    Fumagalli, Mattia; Patel, Shannon G.; Franx, Marijn; Brammer, Gabriel; van Dokkum, Pieter; da Cunha, Elisabete; Kriek, Mariska; Lundgren, Britt; Momcheva, Ivelina; Rix, Hans-Walter; Schmidt, Kasper B.; Skelton, Rosalind E.; Whitaker, Katherine E.; Labbe, Ivo; Nelson, Erica

    2013-07-01

    We investigate the evolution of the Hα equivalent width, EW(Hα), with redshift and its dependence on stellar mass, using the first data from the 3D-HST survey, a large spectroscopic Treasury program with the HST-WFC3. Combining our Hα measurements of 854 galaxies at 0.8

  14. Astrometry, Radial Velocity, and Photometry: The HD 128311 System Remixed with Data from HST, HET, and APT

    Science.gov (United States)

    McArthur, Barbara. E.; Benedict, G. Fritz; Henry, Gregory W.; Hatzes, Artie; Cochran, William D.; Harrison, Tom E.; Johns-Krull, Chris; Nelan, Ed

    2014-11-01

    We have used high-cadence radial velocity measurements from the Hobby-Eberly Telescope with published velocities from the Lick 3 m Shane Telescope, combined with astrometric data from the Hubble Space Telescope (HST) Fine Guidance Sensors to refine the orbital parameters of the HD 128311 system, and determine an inclination of 55.°95 ± 14.°55 and true mass of 3.789 +0.924 -0.432 M JUP for HD 128311 c. The combined radial velocity data also reveal a short period signal which could indicate a third planet in the system with an Msin i of 0.133 ± 0.005 M JUP or stellar phenomena. Photometry from the T12 0.8 m automatic photometric telescope at the Fairborn Observatory and HST are used to determine a photometric period close to, but not within the errors of the radial velocity signal. We performed a cross-correlation bisector analysis of the radial velocity data to look for correlations with the photometric period and found none. Dynamical integrations of the proposed system show long-term stability with the new orbital parameters of over 10 million years. Our new orbital elements do not support the claims of HD 128311 b and c being in mean motion resonance. Based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. Based on observations obtained with the Hobby-Eberly Telescope, which is a joint project of the University of Texas at Austin, the Pennsylvania State University, Stanford University, Ludwig-Maximilians-Universität München, and Georg-August-Universität Göttingen, and observations with T12 0.8 m automatic photoelectric telescope (APT) at Fairborn Observatory.

  15. Diseño y construcción de un molde permanente utilizando un software por elementos finitos Design and construction of a permanent mold using finite element software

    Directory of Open Access Journals (Sweden)

    Fausto Oviedo Fierro

    2013-06-01

    Full Text Available (Recibido: 2012/11/07 - Aceptado: 2013/06/18El proyecto fue desarrollado con especificaciones técnicas de un método de elementos finitospara el cálculo de las variables de campo dentro de un contorno del molde de estudio yeligiendo un modelo matemático apropiado con la incorporación de software. El desarrollo fueuna aplicación físico-practica seleccionando una pieza de aluminio a ser construida, y seanaliza las funciones y solicitaciones a las que está sometida. Se diseña el molde metálico parala producción de las mencionadas piezas con la ayuda del software VULCAN basado en elMétodo de Elementos Finitos (MEF. La simulación se realiza en las tres etapas del proceso defusión: llenado, solidificación y, enfriamiento. En el llenado se considera que existenvelocidades que no produzcan mayores turbulencias y que las piezas se llenen completamente.En la Solidificación se analiza que el sistema de alimentación sea óptimo para que solidifiqueen última instancia y no lo hagan las piezas a producir, evitando así el defecto de falta dematerial en la cavidad del molde (rechupes. En el enfriamiento se analiza la presencia dedeformaciones y tensiones residuales. Paralelamente se validan los resultados de maneraanalítica. Con esta información se define la geometría final del molde metálico y se confirma laaleación con la que se construirá. Posteriormente se utiliza el sistema CAD-CAM-CAE para eldiseño y desarrollo del molde, y así llevar a cabo la construcción. En el molde terminado sevierte la aleación de aluminio seleccionada para obtener las piezas (mancuernas, y finalmenterealizar las pruebas y conclusiones.(Received: 2012/11/07 - Accepted: 2013/06/18The project was developed with specifications of a finite element method for the calculation ofthe field variables within a mold contour by choosing an appropriate mathematical model whichpermitted to incorporate simulation software. The development was a physical

  16. The spatial extent and distribution of star formation in 3D-HST mergers at z ˜ 1.5

    Science.gov (United States)

    Schmidt, Kasper B.; Rix, Hans-Walter; da Cunha, Elisabete; Brammer, Gabriel B.; Cox, Thomas J.; van Dokkum, Pieter; Förster Schreiber, Natascha M.; Franx, Marijn; Fumagalli, Mattia; Jonsson, Patrik; Lundgren, Britt; Maseda, Michael V.; Momcheva, Ivelina; Nelson, Erica J.; Skelton, Rosalind E.; van der Wel, Arjen; Whitaker, Katherine E.

    2013-06-01

    We present an analysis of the spatial distribution of star formation in a sample of 60 visually identified galaxy merger candidates at z > 1. Our sample, drawn from the 3D-HST survey, is flux limited and was selected to have high star formation rates based on fits of their broad-band, low spatial resolution spectral energy distributions. It includes plausible pre-merger (close pairs) and post-merger (single objects with tidal features) systems, with total stellar masses and star formation rates derived from multiwavelength photometry. Here we use near-infrared slitless spectra from 3D-HST which produce Hα or [O III] emission line maps as proxies for star formation maps. This provides a first comprehensive high-resolution, empirical picture of where star formation occurred in galaxy mergers at the epoch of peak cosmic star formation rate. We find that detectable star formation can occur in one or both galaxy centres, or in tidal tails. The most common case (58 per cent) is that star formation is largely concentrated in a single, compact region, coincident with the centre of (one of) the merger components. No correlations between star formation morphology and redshift, total stellar mass or star formation rate are found. A restricted set of hydrodynamical merger simulations between similarly massive and gas-rich objects implies that star formation should be detectable in both merger components, when the gas fractions of the individual components are the same. This suggests that z ˜ 1.5 mergers typically occur between galaxies whose gas fractions, masses and/or star formation rates are distinctly different from one another.

  17. Aplicación para estimar costos en proyectos de software

    OpenAIRE

    Lencina, Berenice; Medina, Yanina; Dapozo, Gladys N.

    2016-01-01

    La estimación es un factor que influye directamente en la calidad del software porque afecta la planificación de tiempo, recursos y presupuestos económicos en la gestión de proyectos. Una encuesta sobre las prácticas de estimación en las empresas o áreas de sistemas en la ciudad de Corrientes determinó que las técnicas más utilizadas son las que están basadas en el juicio de expertos, sin embargo, surge también que se conocen pero se utilizan poco las técnicas paramétricas que garantizan mayo...

  18. Phase diagram of Se-CaIn4Se7 system

    International Nuclear Information System (INIS)

    Musaeva, R.I.; Aliev, I.I; Ismailova, F.I; Aliev, A.A

    2011-01-01

    Full text: The Se-CaIn 4 Se 7 system has been studied using methods of differential thermal analysis, X-ray diffraction, micro structural analysis, density measurements and its phase diagram has been constructed. It has been established that the section Se-CaIn 4 Se 7 is a quasibinary section of the ternary system Ca-In-Se. At room temperature, on the basis of CaIn 2 Se 4 and Se no solid solution has been found

  19. Desarrollo de una aplicación web para control de versiones de software

    OpenAIRE

    Otero Gutiérrez, David

    2011-01-01

    En este proyecto se ha desarrollado una aplicación web que trabaja con un sistema de control de versiones. Este tipo de sistemas son empleados por los desarrolladores para facilitar el trabajo en grupo y para mantener un control de los cambios que se producen en un proyecto durante el tiempo de desarrollo del mismo. Este proyecto posibilita a los usuarios el poder interactuar con un sistema de este tipo sin la necesidad de tener que disponer del software instalado en sus ...

  20. Software Engineering Program: Software Process Improvement Guidebook

    Science.gov (United States)

    1996-01-01

    The purpose of this document is to provide experience-based guidance in implementing a software process improvement program in any NASA software development or maintenance community. This guidebook details how to define, operate, and implement a working software process improvement program. It describes the concept of the software process improvement program and its basic organizational components. It then describes the structure, organization, and operation of the software process improvement program, illustrating all these concepts with specific NASA examples. The information presented in the document is derived from the experiences of several NASA software organizations, including the SEL, the SEAL, and the SORCE. Their experiences reflect many of the elements of software process improvement within NASA. This guidebook presents lessons learned in a form usable by anyone considering establishing a software process improvement program within his or her own environment. This guidebook attempts to balance general and detailed information. It provides material general enough to be usable by NASA organizations whose characteristics do not directly match those of the sources of the information and models presented herein. It also keeps the ideas sufficiently close to the sources of the practical experiences that have generated the models and information.

  1. El desarrollo de software: una acción que coadyuva al desarrollo económico y social de los pueblos

    Directory of Open Access Journals (Sweden)

    José Ebert Bonilla Olaya

    2015-02-01

    El presente escrito tiene por objeto algunos planteamientos del cómo se materializan en la carrera de ingeniería de sistemas, los elementos de la misión institucional. Al mismo tiempo se señalan las posibilidades que brinda la ingeniería del software a nivel de formación profesional y de servicio al país.

  2. Gravity Probe B data system description

    International Nuclear Information System (INIS)

    Bennett, Norman R

    2015-01-01

    The Gravity Probe B data system, developed, integrated, and tested by Lockheed Missiles and Space Company, and later Lockheed Martin Corporation, included flight and ground command, control, and communications software. The development was greatly facilitated, conceptually and by the transfer of key personnel, through Lockheed’s earlier flight and ground test software development for the Hubble Space Telescope (HST). Key design challenges included the tight mission timeline (17 months, 9 days of on-orbit operation), the need to tune the system once on-orbit, and limited 2 Kbps real-time data rates and ground asset availability. The result was a completely integrated space vehicle and Stanford mission operations center, which successfully collected and archived 97% of the ‘guide star valid’ data to support the science analysis. Lessons learned and incorporated from the HST flight software development and on-orbit support experience, and Lockheed’s independent research and development effort, will be discussed. (paper)

  3. An analysis of tools for automatic software development and automatic code generation

    Directory of Open Access Journals (Sweden)

    Viviana Yarel Rosales-Morales

    2015-01-01

    Full Text Available El desarrollo de software es una importante área en la ingeniería de software, por tal motivo han surgido técnicas, enfoques y métodos que permiten la automatización de desarrollo del mismo. En este trabajo se presenta un análisis de las herramientas para el desarrollo automático de software y la generación automática de código fuente, con el fi n de evaluarlas y determinar si cumplen o no con un conjunto de características y funcionalidades en términos de calidad. Dichas características incluyen efi cacia, productividad, seguridad y satisfacción, todo a través de una evaluación cualitativa y cuantitativa. Estas herramientas son 1 herramientas CASE, 2 marcos de trabajo ( frameworks y 3 ambientes de desarrollo integrado (IDEs. La evaluación se llevó a cabo con el fi n de medir no sólo la capacidad de uso, sino también el apoyo que brindan para el desarrollo de software automático y la generación automática de código fuente. El objetivo de este trabajo es proporcionar una metodología y una breve revisión de los trabajos más importantes para, de esta forma, identifi car las principales características de éstos y presentar una evaluación comparativa en términos cualitativos y cuantitativos, con la fi nalidad de proporcionar la información necesaria para el desarrollador de software que facilite la toma de decisiones al considerar herramientas que le pueden ser útiles.

  4. Estudio de técnicas de inserción de marcas de agua sobre software

    OpenAIRE

    Jaimez Moruno, Marc

    2008-01-01

    Este trabajo es un estudio de las distintas técnicas de software watermarking existentes para la protección de la propiedad intelectual contenida en un programa. Partiendo de este estudio se propone una implementación para usar técnicas watermarking en la protección de agentes móviles. Concretamente se implementa una solución para detectar ejecuciones deshonestas por parte de host maliciosos

  5. Software quality assurance plans for safety-critical software

    International Nuclear Information System (INIS)

    Liddle, P.

    2006-01-01

    Application software is defined as safety-critical if a fault in the software could prevent the system components from performing their nuclear-safety functions. Therefore, for nuclear-safety systems, the AREVA TELEPERM R XS (TXS) system is classified 1E, as defined in the Inst. of Electrical and Electronics Engineers (IEEE) Std 603-1998. The application software is classified as Software Integrity Level (SIL)-4, as defined in IEEE Std 7-4.3.2-2003. The AREVA NP Inc. Software Program Manual (SPM) describes the measures taken to ensure that the TELEPERM XS application software attains a level of quality commensurate with its importance to safety. The manual also describes how TELEPERM XS correctly performs the required safety functions and conforms to established technical and documentation requirements, conventions, rules, and standards. The program manual covers the requirements definition, detailed design, integration, and test phases for the TELEPERM XS application software, and supporting software created by AREVA NP Inc. The SPM is required for all safety-related TELEPERM XS system applications. The program comprises several basic plans and practices: 1. A Software Quality-Assurance Plan (SQAP) that describes the processes necessary to ensure that the software attains a level of quality commensurate with its importance to safety function. 2. A Software Safety Plan (SSP) that identifies the process to reasonably ensure that safety-critical software performs as intended during all abnormal conditions and events, and does not introduce any new hazards that could jeopardize the health and safety of the public. 3. A Software Verification and Validation (V and V) Plan that describes the method of ensuring the software is in accordance with the requirements. 4. A Software Configuration Management Plan (SCMP) that describes the method of maintaining the software in an identifiable state at all times. 5. A Software Operations and Maintenance Plan (SO and MP) that

  6. On Some Physical Properties of GeSe3-Sb2Se3-ZnSe Thin Films and Their Radiation Response

    International Nuclear Information System (INIS)

    Hosni, H.M.M.A.

    2010-01-01

    Thin films of the chalcogenides GeSe 3 , Sb 2 Se 3 , ZnSe, (GeSe 3 )80(Sb 2 Se 3 )20 and (GeSe 3 )70(Sb 2 Se 3 )10(ZnSe)20, are prepared by thermal evaporation onto glass substrates. The effect of ZnSe incorporation with both GeSe 3 , Sb 2 Se 3 results in amorphous (GeSe 3 )70(Sb 2 Se 3 )10(ZnSe)20 composition as obtained from the X-ray analysis. Electrical measurements reveal a decrease in dc activation energy, ΔEdc, and an increase in ac activation energy, ΔEac, for (GeSe 3 )70(Sb 2 Se 3 )10(ZnSe)20 as compared with (GeSe 3 )80(Sb 2 Se 3 )20. Optical energy gap, Eg, and band tail width, Ee, are estimated in UV/VIS spectral region for fresh and γ-irradiated films, revealing a decrease in Eg and an increase in Ee for ZnSe and (GeSe 3 )70(Sb 2 Se 3 )10(ZnSe)20 compositions, with irradiation dose.

  7. Intellectual Property Protection of Software – At the Crossroads of Software Patents and Open Source Software

    OpenAIRE

    Tantarimäki, Maria

    2018-01-01

    The thesis considers the intellectual property protection of software in Europe and in the US, which is increasingly important subject as the world is globalizing and digitalizing. The special nature of software has challenges the intellectual property rights. The current protection of software is based on copyright protection but in this thesis, two other options are considered: software patents and open source software. Software patents provide strong protection for software whereas the pur...

  8. Aplicaciones de Software Libre para automatizar servicios en una biblioteca: uso de software Calibre para la creación de un repositorio digital

    Directory of Open Access Journals (Sweden)

    Rolando Herrera Burgos

    2015-01-01

    Full Text Available Este artículo propone el uso de herramientas informáticas desarrolladas bajo el modelo de Software Libre para poder automatizar de forma sencilla distintos servicios que pueden brindar las bibliotecas. Se explora el uso de la aplicación Calibre para crear un repositorio digital que permita a los usuarios acceder a materiales en línea y a texto completo mediante el uso de Internet.

  9. Software Quality Assurance in Software Projects: A Study of Pakistan

    OpenAIRE

    Faisal Shafique Butt; Sundus Shaukat; M. Wasif Nisar; Ehsan Ullah Munir; Muhammad Waseem; Kashif Ayyub

    2013-01-01

    Software quality is specific property which tells what kind of standard software should have. In a software project, quality is the key factor of success and decline of software related organization. Many researches have been done regarding software quality. Software related organization follows standards introduced by Capability Maturity Model Integration (CMMI) to achieve good quality software. Quality is divided into three main layers which are Software Quality Assurance (SQA), Software Qu...

  10. A software engineering process for safety-critical software application

    International Nuclear Information System (INIS)

    Kang, Byung Heon; Kim, Hang Bae; Chang, Hoon Seon; Jeon, Jong Sun

    1995-01-01

    Application of computer software to safety-critical systems in on the increase. To be successful, the software must be designed and constructed to meet the functional and performance requirements of the system. For safety reason, the software must be demonstrated not only to meet these requirements, but also to operate safely as a component within the system. For longer-term cost consideration, the software must be designed and structured to ease future maintenance and modifications. This paper presents a software engineering process for the production of safety-critical software for a nuclear power plant. The presentation is expository in nature of a viable high quality safety-critical software development. It is based on the ideas of a rational design process and on the experience of the adaptation of such process in the production of the safety-critical software for the shutdown system number two of Wolsung 2, 3 and 4 nuclear power generation plants. This process is significantly different from a conventional process in terms of rigorous software development phases and software design techniques, The process covers documentation, design, verification and testing using mathematically precise notations and highly reviewable tabular format to specify software requirements and software requirements and software requirements and code against software design using static analysis. The software engineering process described in this paper applies the principle of information-hiding decomposition in software design using a modular design technique so that when a change is required or an error is detected, the affected scope can be readily and confidently located. it also facilitates a sense of high degree of confidence in the 'correctness' of the software production, and provides a relatively simple and straightforward code implementation effort. 1 figs., 10 refs. (Author)

  11. Software architecture analysis tool : software architecture metrics collection

    NARCIS (Netherlands)

    Muskens, J.; Chaudron, M.R.V.; Westgeest, R.

    2002-01-01

    The Software Engineering discipline lacks the ability to evaluate software architectures. Here we describe a tool for software architecture analysis that is based on metrics. Metrics can be used to detect possible problems and bottlenecks in software architectures. Even though metrics do not give a

  12. Customer Interaction in Software Development: A Comparison of Software Methodologies Deployed in Namibian Software Firms

    CSIR Research Space (South Africa)

    Iyawa, GE

    2016-01-01

    Full Text Available within the Namibian context. An implication for software project managers and software developers is that customer interaction should be properly managed to ensure that the software methodologies for improving software development processes...

  13. Estudio de similitud del proceso de gestión de riesgos en proyectos de outsourcing de software: utilización de un método Similarity study of risk management process in software outsourcing projects: using a method

    Directory of Open Access Journals (Sweden)

    Gloria Piedad Gasca Hurtado

    2010-07-01

    Full Text Available En este artículo, se realiza un estudio de estándares y modelos de ingeniería de software con el fin de determinar similitudes entre los mismos, desde el punto de vista del proceso de gestión de riesgos en el ámbito de outsourcing de software. Para seleccionar y analizar dichos estándares y modelos de manera formal, se utiliza el método MSSS desarrollado a partir de un profundo análisis de diferentes mapeos de estándares y modelos, que dan lugar una serie de pasos o pautas que permiten formalizar y organizar el estudio. Esta investigación permite, además de determinar las similitudes, hacer una comparación de cada estándar y modelo, previa selección y clasificación de los mismos según el ámbito en el que se enfoca.In this paper, a study of software engineering standards and models to determine similarities between them has been carried out, from the viewpoint of risk management process in the field of software outsourcing. To select and review these standards and models, MSSS model was used, which was developed from a thorough analysis of different mapping standards and models, leading a series of steps or guidelines to help formalize and organize the study. Besides determining similarities, this research makes a comparison of each standard and model, prior selection and classification of them, according to the area it focuses.

  14. Semiconductor-metal transition of Se in Ru-Se Catalyst Nanoparticles

    Science.gov (United States)

    Babu, P. K.; Lewera, Adam; Oldfield, Eric; Wieckowski, Andrzej

    2009-03-01

    Ru-Se composite nanoparticles are promising catalysts for the oxygen reduction reaction (ORR) in fuel cells. Though the role of Se in enhancing the chemical stability of Ru nanoparticles is well established, the microscopic nature of Ru-Se interaction was not clearly understood. We carried out a combined investigation of ^77Se NMR and XPS on Ru-Se nanoparticles and our results indicate that Se, a semiconductor in elemental form, becomes metallic when interacting with Ru. ^77Se spin-lattice relaxation rates are found to be proportional to T, the well-known Korringa behavior characteristic of metals. The NMR results are supported by the XPS binding energy shifts which suggest that a possible Ru->Se charge transfer could be responsible for the semiconductor->metal transition of Se which also makes Ru less susceptible to oxidation during ORR.

  15. A SOFTWARE RELIABILITY ESTIMATION METHOD TO NUCLEAR SAFETY SOFTWARE

    Directory of Open Access Journals (Sweden)

    GEE-YONG PARK

    2014-02-01

    Full Text Available A method for estimating software reliability for nuclear safety software is proposed in this paper. This method is based on the software reliability growth model (SRGM, where the behavior of software failure is assumed to follow a non-homogeneous Poisson process. Two types of modeling schemes based on a particular underlying method are proposed in order to more precisely estimate and predict the number of software defects based on very rare software failure data. The Bayesian statistical inference is employed to estimate the model parameters by incorporating software test cases as a covariate into the model. It was identified that these models are capable of reasonably estimating the remaining number of software defects which directly affects the reactor trip functions. The software reliability might be estimated from these modeling equations, and one approach of obtaining software reliability value is proposed in this paper.

  16. Estratégia empresarial da Critical Software

    OpenAIRE

    Sousa, Inês Pais de

    2010-01-01

    Projecto de Mestrado em Gestão Empresarial A tese de mestrado, que se apresenta, consiste num caso de estudo sobre a Critical Software, na vertente da sua Estratégia Empresarial, e tem como objectivo percepcionar quais os aspectos determinantes de uma estratégia capazes de conduzir ao sucesso de uma empresa. Com a resolução do presente caso é ainda possível percepcionar a importância da conquista de uma vantagem competitiva e da definição de um claro posicionamento no mercado. Com ba...

  17. Protocol adaptations to conduct Systematic Literature Reviews in Software Engineering: a chronological study

    Directory of Open Access Journals (Sweden)

    Samuel Sepúlveda

    2015-09-01

    Full Text Available Systematic literature reviews (SLR have reached a considerable level of adoption in Software Engineering (SE, how-ever protocol adaptations for its implementation remain tangentially addressed. This work provides a chronological framework for the use and adaptation of the SLR protocol, including its current status. A systematic literature search was performed, reviewing a set of twelve articles being selected in accordance with the inclusion and exclusion criteria between 2004 and 2013, using digital data sources recognized by the SE community. A chronological framework is provided that includes the current state of the protocol adaptations to conduct SLR in SE. The results indicate areas where the quantity and quality of investigations needs to be increased and the identi- fication of the main proposals providing adaptations for the protocol conducting SLR in SE.

  18. LA MODELACIÓN MATEMÁTICA EN SITUACIONES COTIDIANAS CON LOS SOFTWARE AVIMECA Y MATHCAD.

    Directory of Open Access Journals (Sweden)

    Rafael Pantoja Rangel

    2013-08-01

    Full Text Available Los procesos de modelación a través del planteamiento de relaciones funcionales, son considerados tanto por estudiantes y profesores, como tareas difíciles, ya que las actividades requieren de una destreza eficiente y creativa para articular y manejar diferentes representaciones de una situación de la vida cotidiana y relacionarlas con la modelación matemática. Además del bagaje de conocimiento matemático que los alumnos requieren a la hora de establecer un plan de solución, la resolución de problemas y trabajo colaborativo, son fundamentales para promover el aprendizaje. En este reporte se presentan como situaciones de la vida cotidiana, el llenado de recipientes, el atletismo y el ciclismo, y se trata de que el estudiante identifique las relaciones entre las variables que intervienen, así cómo determinar la función que modela su comportamiento. La actividad se filma en video, y con el software AVIMECA se obtienen datos en tiempo real del video, mismos que se tratan con Excel y se seleccionan para obtener su representación gráfica: tiempo-distancia. A partir de estos datos, con el programa MathCad se desarrolla el algoritmo de mínimos cuadrados y obtiene la expresión de la función que modela el fenómeno.ABSTRACTModeling processes through the approach of functional relationships are considered by both, students and teachers, as a difficult task since the activities require efficient and creative skills to connect and manage different representations of a situation of daily life, and relate with mathematical modeling. In addition to the background of mathematical knowledge that students require when establishing a solution plan, problem solving and collaborative work are essential to promote learning. This report presents as everyday life situations activities relating to filling containers, athletics and cycling. The goal is that the student identifies the relationships between the variables involved in the phenomenon and

  19. Framework de evaluación de productos Software

    OpenAIRE

    Angeleri, Paula; Titiosky, Rolando; Ceballos, Jorge

    2016-01-01

    El objetivo de este artículo es presentar la situación actual y los avances realizados en el proyecto de investigación MyFEPS Metodologías y Framework para la Evaluación de Productos de Software, desarrollado en la Facultad de Ingeniería y Tecnología Informática de la Universidad de Belgrano. En este contexto se describen las actividades de transferencia y ajustes al Framework, producto de la última fase del proyecto.

  20. Space Flight Software Development Software for Intelligent System Health Management

    Science.gov (United States)

    Trevino, Luis C.; Crumbley, Tim

    2004-01-01

    The slide presentation examines the Marshall Space Flight Center Flight Software Branch, including software development projects, mission critical space flight software development, software technical insight, advanced software development technologies, and continuous improvement in the software development processes and methods.

  1. Bio-fortification and isotopic labelling of Se metabolites in onions and carrots following foliar application of Se and 77Se

    DEFF Research Database (Denmark)

    Kápolna, Emese; Laursen, Kristian H.; Husted, Søren

    2012-01-01

    Se. The 77Se- labelled metabolites in onions were predominantly γ-glutamyl-77Se-selenomethyl-selenocysteine (γ-glu-Me77SeCys), 77Se-methylselenocysteine (Me77SeCys) and 77Se-selenomethionine (77SeMet). Furthermore, we report here for the first time the finding in carrots of the bioactive Me77SeCys...

  2. HidroEsta, software para cálculos hidrológicos

    Directory of Open Access Journals (Sweden)

    Máximo Villón Béjar

    Full Text Available Este trabajo de investigación se orientó a la elaboración de una herramientacomputacional bajo el título HidroEsta, software para cálculos hidrológicos,utilizando Visual Basic, el cual pretende ser una aplicación que permita facilitar y simplificar los cálculos laboriosos que se deben realizar en los estudios hidrológicos. El software permite el cálculo de los parámetros estadísticos, cálculos de regresión lineal, no lineal, simple y múltiple, así como regresión polinomial, evaluar si una serie de datos se ajustan a una serie de distribuciones, calcular a partir de la curva de variación estacional o la curva de duración, eventos de diseño con determinada probabilidad de ocurrencia, realizar el análisis de una tormenta y calcular intensidades máximas, a partir de datos de pluviogramas, los cálculos de aforos realizados con correntómetros o molinetes, el cálculo de caudalesmáximos, con métodos empíricos y estadísticos, cálculos de la evapotranspiración y cálculo del balance hídrico. En la investigación se probaron diferentes métodos numéricos para la solución de las ecuaciones, seleccionándose el más adecuado para cada situación. El producto del trabajo proporciona al ingeniero civil, agrícola, agrónomo, hidrólogos y otros especialistas que trabajen en este campo, una herramienta que permite realizar cálculos, simulaciones rápidas, y determinar los caudales o precipitaciones de diseño.

  3. Projeto Seis Sigma para a implementação de software de programação Six Sigma project for scheduling software implementation

    Directory of Open Access Journals (Sweden)

    Rogério Cerávolo Calia

    2005-12-01

    Full Text Available O artigo visa analisar a eficácia organizacional da metodologia Seis Sigma na gestão de projetos para a redução de atrasos e redução de estoques na manufatura, por meio da implementação de um software com algoritmos da Teoria das Restrições. Inicialmente, é apresentada uma revisão bibliográfica sobre a gestão de projetos na perspectiva da gestão da mudança organizacional nos processos de negócios. Em seguida, são revistos os conceitos sobre a metodologia Seis Sigma para a gestão de projetos e sobre os algoritmos da Teoria das Restrições. Então, são descritos os estudos de caso em dois projetos de implementação do software da Teoria das Restrições, sendo que apenas uma das implementações utilizou-se da metodologia Seis Sigma para a gestão do projeto. Na análise dos resultados, busca-se compreender os motivos de o projeto com a metodologia Seis Sigma ter reduzido inventário três vezes mais rápido do que o projeto sem o Seis Sigma.The article aims to analyze the organizational effectiveness of the Six Sigma methodology for project management to reduce delays and to reduce inventory in manufacture, by the implementation of software with Theory of Constraints algorithms. Initially, the article presents a bibliographic revision on project management and its impact on the organizational change management for improving business processes. Then, the article revises the concepts about the Six Sigma methodology for project management and about the Theory of Constraints algorithms. It follows, the case studies descriptions on two implementation projects of the Theory of Constraints software, in which only one of these implementations adopted the Six Sigma methodology in the project management. In the results analyzes, the article discusses the reasons why the project with the Six Sigma methodology was three times faster than the other project.

  4. Análisis proximal, evaluación microbiológica y sensorial de carnes para hamburguesas elaboradas con cachama blanca (Piaractus brachypomus y soya (Glycine max texturizada

    Directory of Open Access Journals (Sweden)

    Oscar García

    2013-12-01

    Full Text Available La cachama blanca (Piaractus brachypomus es una especie económicamente importante en la acuicultura continental de América Latina y una alternativa nacional de producción de pescado para la piscicultura, la industria y el consumo. El objetivo del presente trabajo de investigación fue caracterizar mediante análisis proximal, evaluación microbiológica y sensorial, carnes para hamburguesas elaboradas con pulpa de cachama y diferentes inclusiones porcentuales de harina de soya texturizada (HST (0, 3, 6 y 9 %. Se realizó análisis proximal a las carnes crudas y cocidas, se evaluó microbiológicamente a las crudas y sensorialmente las cocidas con 100 consumidores. En las carnes para hamburguesas a mayor adición de HST favoreció la retención de agua durante la cocción y se elevó el contenido de proteína, grasa y cenizas en las carnes crudas y cocidas (p < 0,05. El análisis microbiológico reveló inocuidad alimentaria en las carnes para hamburguesas crudas, encontrándose todos los valores por debajo de lo establecido en la norma venezolana COVENIN 2127-1998 para hamburguesa y otras normas de referencia. La blandura aumentó de manera proporcional al incremento porcentual en la inclusión de HST y las formulaciones con 0, 3 y 6 % de HST se diferenciaron significativamente (p < 0,05 de la formulación con 9 %. La apariencia de las carnes de hamburguesa agradó más en las formulaciones 6 y 9 %, la blandura en 9 %, y el sabor en el control (0 %, seguido de 3 %. Algunos consumidores hicieron asociaciones de sabor a carne de pollo, mariscos y hervidos de pollo.

  5. A HST/WFC3 Search for Substellar Companions in the Orion Nebula Cluster

    Science.gov (United States)

    Strampelli, Giovanni Maria; Aguilar, Jonathan; Aparicio, Antonio; Piotto, Giampaolo; Pueyo, Laurent; Robberto, Massimo

    2018-01-01

    We present new results relative to the population of substellar binaries in the Orion Nebula Cluster. We reprocessed HST/WFC3 data using an analysis technique developed to detect close companions in the wings of the stellar PSFs, based on the PyKLIP implementation of the KLIP PSF subtraction algorithm. Starting from a sample of ~1200 stars selected over the range J=11-15 mag, we were able to uncover ~80 candidate companions in the magnitude range J=16-23 mag. We use the presence of the 1.4 micron H2O absorption feature in the companion photosphere to discriminate 32 bona-fide substellar candidates from a population of reddened background objects. We derive an estimate of the companion mass assuming a 2Myr isochrone and the reddening of their primary. With 8 stellar companions, 19 brown dwarfs and 5 planetary mass objects, our study provide us with an unbiased sample of companions at the low-mass end of the IMF, probing the transition from binary to planetary systems.

  6. Boosting Government Performance with Open Source Software? – A Roadmap for Germany (¿Impulsar el desempeño del estado con software de código abierto? - Plan de trabajo para Alemania

    Directory of Open Access Journals (Sweden)

    Norbert Jesse

    2014-05-01

    Full Text Available English abstract Governments face a considerable pressure from all directions: budget restrictions, citizens’ expectations, demographical trends, local competition from surrounding areas – to name just a few. EGovernment is regarded as an imminent tool to tackle many of these challenges. Obviously, IT itself is object of increasing complexity, constant change and financial implications. This paper outlines how the federal German government follows a strategic roadmap for eGovernment by shaping the objectives and goals for IT expansion. We discuss the role of open source software and how new approaches for software development can turn the ambitious aims into reality. Spanish abstract Los gobiernos se enfrentan a una gran presión desde todas las direcciones: las restricciones presupuestarias, las expectativas de los ciudadanos, las tendencias demográficas, la competencia local- por nombrar algunos. El gobierno electrónico es considerado una herramienta inminente para abordar muchos de estos problemas. Obviamente, las TIC son objetos de complejidad creciente, cambio constante e implicaciones financieras. Este documento describe cómo el gobierno federal alemán sigue una hoja de ruta estratégica para el gobierno electrónico dándole forma a los objetivos y metas para su expansión tecnológica. Se discute el papel del software libre y cómo los nuevos enfoques para el desarrollo de software pueden convertir estos ambiciosos objetivos en realidad.

  7. Software attribute visualization for high integrity software

    Energy Technology Data Exchange (ETDEWEB)

    Pollock, G.M.

    1998-03-01

    This report documents a prototype tool developed to investigate the use of visualization and virtual reality technologies for improving software surety confidence. The tool is utilized within the execution phase of the software life cycle. It provides a capability to monitor an executing program against prespecified requirements constraints provided in a program written in the requirements specification language SAGE. The resulting Software Attribute Visual Analysis Tool (SAVAnT) also provides a technique to assess the completeness of a software specification.

  8. Informação e software livre no capitalismo contemporâneo

    Directory of Open Access Journals (Sweden)

    Fernando Augusto M. Mattos

    2007-07-01

    Full Text Available A sociedade contemporânea mostra cada vez mais a necessidade de o indivíduo ter controle do processo de seleção, processamento, comunicação e uso das informações. A informatização da sociedade é notória e crescente, mediada principalmente pelas novas tecnologias, capazes de estabelecer elos em diferentes e distantes espaços geográficos, convergindo com uma grande quantidade de informações nas mais diversas áreas da inteligência humana, seja para o uso cultural, empresarial, político e governamental ou mesmo de entretenimento. Frente às transformações tecnológicas, ocorridas a partir da implementação efetiva da Internet, surgem novas formas de organização e produção de software, tendo como destaque no cenário atual o movimento de software livre e os discursos existentes de que ele se estabeleceria com um caráter libertador no compartilhamento de informação e conhecimento. Este estudo verifica as tendências e os rumos do software livre no capitalismo contemporâneo, efetuando uma discussão com os discursos existentes, se apoiando na Ciência da Informação e nas discussões da economia política da informação.

  9. Abordagens do PMBOK e CMMI sobre o Sucesso dos Projetos de Softwares

    Directory of Open Access Journals (Sweden)

    Ezequias Batista Pinto

    2014-09-01

    Full Text Available Nas últimas décadas aumentaram as discussões, publicações, métodos e ferramentas sobre gestão de projetos. Ao mesmo tempo, várias pesquisas buscam apontar as principais causas para fracassos em projetos, propiciando análises sobre as causas e criação de melhores práticas para auxiliar os profissionais a adquirirem maturidade e repetição de casos de sucesso. Diante da relevância do tema, este artigo descreve as principais abordagens do modelo de maturidade no desenvolvimento de software (CMMI e a metodologia PMI para gestão de projeto (PMBOK, com o intuito de compará-los e levantar requisitos para a eficácia no gerenciamento de projetos de software. Concluiu-se que tanto o PMBOK quanto o CMMI tem um enfoque em gerenciamento de projetos, porém a estrutura de ambos é diferente e se completam. O PMBOK proporciona processos adicionais de gerenciamento de projetos para o CMMI, uma vez que apresenta o planejamento de documentos, tais como o plano de comunicações, de maneira mais detalhada. Já o CMMI proporciona uma estrutura para o gerenciamento e a melhoria de processos, para as melhores práticas de engenharia de software, para o gerenciamento de dados e para a análise de decisões.

  10. Algunas características económicas del mantenimiento no correctivo del software a medida.

    OpenAIRE

    Torralba Martínez, José María; Rodenes Adam, Manuel

    2001-01-01

    Se presentan algunas características económicas del servicio de mantenimiento del software, relativas pricipalmente al área comercial: mercado, producto, precio y clientización, apuntando la importancia económica que tiene tanto para

  11. Software cost/resource modeling: Software quality tradeoff measurement

    Science.gov (United States)

    Lawler, R. W.

    1980-01-01

    A conceptual framework for treating software quality from a total system perspective is developed. Examples are given to show how system quality objectives may be allocated to hardware and software; to illustrate trades among quality factors, both hardware and software, to achieve system performance objectives; and to illustrate the impact of certain design choices on software functionality.

  12. The Spatial Extent and Distribution of Star Formation in 3D-HST Mergers at z is approximately 1.5

    Science.gov (United States)

    Schmidt, Kasper B.; Rix, Hans-Walter; da Cunha, Elisabete; Brammer, Gabriel B.; Cox, Thomas J.; Van Dokkum, Pieter; Foerster Schreiber, Natascha M.; Franx, Marijn; Fumagalli, Mattia; Jonsson, Patrik; hide

    2013-01-01

    We present an analysis of the spatial distribution of star formation in a sample of 60 visually identified galaxy merger candidates at z greater than 1. Our sample, drawn from the 3D-HST survey, is flux-limited and was selected to have high star formation rates based on fits of their broad-band, low spatial resolution spectral energy distributions. It includes plausible pre-merger (close pairs) and post-merger (single objects with tidal features) systems,with total stellar masses and star formation rates derived from multi-wavelength photometry. Here we use near-infrared slitless spectra from 3D-HST which produce H or [OIII] emission line maps as proxies for star-formation maps. This provides a first comprehensive high-resolution, empirical picture of where star formation occurred in galaxy mergers at the epoch of peak cosmic star formation rate. We find that detectable star formation can occur in one or both galaxy centres, or in tidal tails. The most common case (58%) is that star formation is largely concentrated in a single, compact region, coincident with the centre of (one of) the merger components. No correlations between star formation morphology and redshift, total stellar mass, or star formation rate are found. A restricted set of hydrodynamical merger simulationsbetween similarly massive and gas-rich objects implies that star formation should be detectable in both merger components, when the gas fractions of the individual components are the same. This suggests that z is approximately 1.5 mergers typically occur between galaxies whose gas fractions, masses, andor star formation rates are distinctly different from one another.

  13. Quetzalcoatl: Una Herramienta para Generar Contratos de Desarrollo de Software en Entornos de Outsourcing

    OpenAIRE

    Jezreel Mejía; Sergio D. Ixmatlahua; Alma I. Sánchez

    2014-01-01

    Actualmente el outsourcing es una de las actividades principales de trabajo. Sin embargo, las relaciones que se dan entre un cliente y un proveedor de servicios no son lo suficientemente fuertes para lograr las expectativas de los acuerdos. El contrato de outsourcing para proyectos en desarrollo de software es una alternativa a este tipo de relaciones. En este artículo se presenta la arquitectura de la herramienta Quetzalcoatl, así como las funciones principales que ofrece la herramienta, tod...

  14. Interallelic and intergenic incompatibilities of the Prdm9 (Hst1 gene in mouse hybrid sterility.

    Directory of Open Access Journals (Sweden)

    Petr Flachs

    Full Text Available The Dobzhansky-Muller model of incompatibilities explains reproductive isolation between species by incorrect epistatic interactions. Although the mechanisms of speciation are of great interest, no incompatibility has been characterized at the gene level in mammals. The Hybrid sterility 1 gene (Hst1 participates in the arrest of meiosis in F(1 males of certain strains from two Mus musculus subspecies, e.g., PWD from M. m. musculus and C57BL/6J (henceforth B6 from M. m. domesticus. Hst1 has been identified as a meiotic PR-domain gene (Prdm9 encoding histone 3 methyltransferase in the male offspring of PWD females and B6 males, (PWD×B6F(1. To characterize the incompatibilities underlying hybrid sterility, we phenotyped reproductive and meiotic markers in males with altered copy numbers of Prdm9. A partial rescue of fertility was observed upon removal of the B6 allele of Prdm9 from the azoospermic (PWD×B6F(1 hybrids, whereas removing one of the two Prdm9 copies in PWD or B6 background had no effect on male reproduction. Incompatibility(ies not involving Prdm9(B6 also acts in the (PWD×B6F(1 hybrids, since the correction of hybrid sterility by Prdm9(B6 deletion was not complete. Additions and subtractions of Prdm9 copies, as well as allelic replacements, improved meiotic progression and fecundity also in the progeny-producing reciprocal (B6×PWDF(1 males. Moreover, an increased dosage of Prdm9 and reciprocal cross enhanced fertility of other sperm-carrying male hybrids, (PWD×B6-C3H.Prdm9F(1, harboring another Prdm9 allele of M. m. domesticus origin. The levels of Prdm9 mRNA isoforms were similar in the prepubertal testes of all types of F(1 hybrids of PWD with B6 and B6-C3H.Prdm9 despite their different prospective fertility, but decreased to 53% after removal of Prdm9(B6. Therefore, the Prdm9(B6 allele probably takes part in posttranscriptional dominant-negative hybrid interaction(s absent in the parental strains.

  15. Interallelic and intergenic incompatibilities of the Prdm9 (Hst1) gene in mouse hybrid sterility.

    Science.gov (United States)

    Flachs, Petr; Mihola, Ondřej; Simeček, Petr; Gregorová, Soňa; Schimenti, John C; Matsui, Yasuhisa; Baudat, Frédéric; de Massy, Bernard; Piálek, Jaroslav; Forejt, Jiří; Trachtulec, Zdenek

    2012-01-01

    The Dobzhansky-Muller model of incompatibilities explains reproductive isolation between species by incorrect epistatic interactions. Although the mechanisms of speciation are of great interest, no incompatibility has been characterized at the gene level in mammals. The Hybrid sterility 1 gene (Hst1) participates in the arrest of meiosis in F(1) males of certain strains from two Mus musculus subspecies, e.g., PWD from M. m. musculus and C57BL/6J (henceforth B6) from M. m. domesticus. Hst1 has been identified as a meiotic PR-domain gene (Prdm9) encoding histone 3 methyltransferase in the male offspring of PWD females and B6 males, (PWD×B6)F(1). To characterize the incompatibilities underlying hybrid sterility, we phenotyped reproductive and meiotic markers in males with altered copy numbers of Prdm9. A partial rescue of fertility was observed upon removal of the B6 allele of Prdm9 from the azoospermic (PWD×B6)F(1) hybrids, whereas removing one of the two Prdm9 copies in PWD or B6 background had no effect on male reproduction. Incompatibility(ies) not involving Prdm9(B6) also acts in the (PWD×B6)F(1) hybrids, since the correction of hybrid sterility by Prdm9(B6) deletion was not complete. Additions and subtractions of Prdm9 copies, as well as allelic replacements, improved meiotic progression and fecundity also in the progeny-producing reciprocal (B6×PWD)F(1) males. Moreover, an increased dosage of Prdm9 and reciprocal cross enhanced fertility of other sperm-carrying male hybrids, (PWD×B6-C3H.Prdm9)F(1), harboring another Prdm9 allele of M. m. domesticus origin. The levels of Prdm9 mRNA isoforms were similar in the prepubertal testes of all types of F(1) hybrids of PWD with B6 and B6-C3H.Prdm9 despite their different prospective fertility, but decreased to 53% after removal of Prdm9(B6). Therefore, the Prdm9(B6) allele probably takes part in posttranscriptional dominant-negative hybrid interaction(s) absent in the parental strains.

  16. Calculation Software versus Illustration Software for Teaching Statistics

    DEFF Research Database (Denmark)

    Mortensen, Peter Stendahl; Boyle, Robin G.

    1999-01-01

    As personal computers have become more and more powerful, so have the software packages available to us for teaching statistics. This paper investigates what software packages are currently being used by progressive statistics instructors at university level, examines some of the deficiencies...... of such software, and indicates features that statistics instructors wish to have incorporated in software in the future. The basis of the paper is a survey of participants at ICOTS-5 (the Fifth International Conference on Teaching Statistics). These survey results, combined with the software based papers...

  17. Estudio de adopción de técnicas de desarrollo de software guiado por las pruebas

    OpenAIRE

    Maldonado, Calixto; Gastañaga, Iris; Inchaurrondo, Claudia Inés; Vaca, Pablo A.; Bueno, Matías; Romero, María Soledad; Peretti, Juan Pablo

    2016-01-01

    En el presente proyecto, dentro del Grupo de Investigación, Desarrollo y Transferencia de Sistemas de Información (GIDTSI), se estudiaron las implementaciones existentes de los frameworks aplicados en Test-Driven Development (TDD) y Behavior-Driven Development (BDD) y como resultado al final del mismo se prevé proponer una forma de integración entre distintas técnicas de (TDD) y (BDD). Para el estudio de campo entre las empresas de de desarrollo de software se ha creado un formulario de encue...

  18. Software system safety

    Science.gov (United States)

    Uber, James G.

    1988-01-01

    Software itself is not hazardous, but since software and hardware share common interfaces there is an opportunity for software to create hazards. Further, these software systems are complex, and proven methods for the design, analysis, and measurement of software safety are not yet available. Some past software failures, future NASA software trends, software engineering methods, and tools and techniques for various software safety analyses are reviewed. Recommendations to NASA are made based on this review.

  19. Software para enseñar emociones al alumnado con trastorno del espectro autista Software for Teaching Emotions to Students with Autism Spectrum Disorder

    Directory of Open Access Journals (Sweden)

    Josefina Lozano Martínez

    2011-03-01

    Full Text Available En este artículo se presentan los resultados de una investigación en la que se ha utilizado un software educativo para apoyar el proceso de enseñanza y aprendizaje de competencias emocionales y sociales en alumnado con trastornos del espectro autista (TEA escolarizado en educación primaria y secundaria. Los participantes, con dificultades en el reconocimiento de estados emocionales, han sido nueve alumnos de edades comprendidas entre los 8 y 18 años, de ambos sexos y con un rango de índice de edad mental entre 5 y 7 años de edad. Para ello, se utilizó un diseño de grupo único con pretest-postest. Así, antes del proceso de enseñanza, el alumnado fue evaluado con relación a sus niveles de competencia emocional y social, con la finalidad de establecer, también, el nivel de inicio del proceso de enseñanza para cada uno de ellos. El proceso de enseñanza se desarrolló a lo largo de dos sesiones semanales de 45 minutos, cada una, en un intervalo de dos cursos académicos (2006/08. Tras el proceso de intervención educativa, los alumnos fueron nuevamente evaluados. Los resultados obtenidos confirman que la utilización del software educativo en la enseñanza de competencias emocionales y sociales ayuda a los alumnos a mejorar su capacidad para superar tareas encaminadas a la comprensión de competencias emocionales. Además, los participantes mejoraron sus competencias sociales ya que docentes y familiares apreciaron progresos significativos en esta área.This paper reports the results of a research project in which educational software was used to teach social and emotional skills to primary and secondary school students with autism spectrum disorders (ASD. The participants with difficulties in recognizing emotional states were nine male and female students aged between 8 and 18, with a mental age range of between 5 and 7 years. A single group design with pre-test/post-test was used. The students were assessed before teaching in

  20. Introducción a un modelo complejo de los softwares multimediales educativos

    Directory of Open Access Journals (Sweden)

    Luis R. Lara

    2004-01-01

    Full Text Available El diseño de softwares multimediales educativos como materiales para educación a distancia, ha llevado a que éstos sean realizados basados en principios de desarrollos empíricos. Este artículo, desde una nueva perspectiva teórica interdisciplinaria, enfoca la cuestión del desarrollo de estos materiales interactivos, considerándolos como Sistemas Interactivos Multimediales (SIM, relacionándolos con principios de disciplinas y conceptos tan diversos como la termodinámica, entropía, constructivismo y teoría general de sistemas. De esta manera, se orienta el proceso de diseño de los SIMs como un sistema complejo aceptando, desde una perspectiva constructivista, que el alumno toma el rol protagónico en el proceso de aprendizaje, entonces, un nuevo modelo de software multimedial educativo debería implicar al alumno no sólo en el tramo final como usuario, sino que tendría que intervenir durante toda la etapa en que se va realizando el proceso de aprendizaje.

  1. Cómo Guiar a las Pymes en la Mejora de Procesos Software

    Directory of Open Access Journals (Sweden)

    Oscar Carrillo Razón

    2014-03-01

    Full Text Available En la actualidad, las grandes empresas de desarrollo de software generan enormes cantidades de información, estos datos son analizados con el objetivo de mejorar los procesos y productos que generan las empresas, sin embargo, es muy común que las Pymes no efectúen la recolección de datos y tampoco tengan procesos definidos. Por lo tanto, se propone un método que guie a las Pymes en la Mejora de Procesos Software. El método integra la identificación del estado actual de la organización, para definir y establecer los objetivos de negocio y la identificación de las mejores prácticas internas de la organización, para entender su forma de trabajo a través de la extracción del conocimiento tácito. Además, se presenta un caso de estudio que ha permitido obtener resultados del método propuesto, el cual ha sido implementado en una pyme.

  2. 3D-HST+CANDELS: The Evolution of the Galaxy Size-Mass Distribution since z = 3

    Science.gov (United States)

    van der Wel, A.; Franx, M.; van Dokkum, P. G.; Skelton, R. E.; Momcheva, I. G.; Whitaker, K. E.; Brammer, G. B.; Bell, E. F.; Rix, H.-W.; Wuyts, S.; Ferguson, H. C.; Holden, B. P.; Barro, G.; Koekemoer, A. M.; Chang, Yu-Yen; McGrath, E. J.; Häussler, B.; Dekel, A.; Behroozi, P.; Fumagalli, M.; Leja, J.; Lundgren, B. F.; Maseda, M. V.; Nelson, E. J.; Wake, D. A.; Patel, S. G.; Labbé, I.; Faber, S. M.; Grogin, N. A.; Kocevski, D. D.

    2014-06-01

    Spectroscopic+photometric redshifts, stellar mass estimates, and rest-frame colors from the 3D-HST survey are combined with structural parameter measurements from CANDELS imaging to determine the galaxy size-mass distribution over the redshift range 0 3 × 109 M ⊙, and steep, R_{eff}\\propto M_*^{0.75}, for early-type galaxies with stellar mass >2 × 1010 M ⊙. The intrinsic scatter is lsim0.2 dex for all galaxy types and redshifts. For late-type galaxies, the logarithmic size distribution is not symmetric but is skewed toward small sizes: at all redshifts and masses, a tail of small late-type galaxies exists that overlaps in size with the early-type galaxy population. The number density of massive (~1011 M ⊙), compact (R eff < 2 kpc) early-type galaxies increases from z = 3 to z = 1.5-2 and then strongly decreases at later cosmic times.

  3. Charge deposition model for investigating SE-microdose effect in trench power MOSFETs

    Science.gov (United States)

    Xin, Wan; Weisong, Zhou; Daoguang, Liu; Hanliang, Bo; Jun, Xu

    2015-05-01

    It was demonstrated that heavy ions can induce large current—voltage (I-V) characteristics shift in commercial trench power MOSFETs, named single event microdose effect (SE-microdose effect). A model is presented to describe this effect. This model calculates the charge deposition by a single heavy ion hitting oxide and the subsequent charge transport under an electric field. Holes deposited at the SiO2/Si interface by a Xe ion are calculated by using this model. The calculated results were then used in Sentaurus TCAD software to simulate a trench power MOSFET's I-V curve shift after a Xe ion has hit it. The simulation results are consistent with the related experiment's data. In the end, several factors which affect the SE-microdose effect in trench power MOSFETs are investigated by using this model.

  4. Controladores multivariables para un vehículo autónomo terrestre: Comparación basada en la fiabilidad del software

    Directory of Open Access Journals (Sweden)

    Norberto Cañas

    2014-04-01

    Full Text Available Resumen: Se presenta en este artículo la comparación de tres controladores de velocidad (regulador cuadrático lineal-LQR-, proporcional integral derivativo-PID-y borroso con la intención de determinar cuál de ellos ofrece mejor fiabilidad desde una perspectiva software. Para realizar las pruebas necesarias se utilizaron versiones mutantes de controladores bien ajustados, en los que se inyectaron defectos que simulaban errores de programación. Los controladores fueron diseñados para operar un vehículo autónomo terrestre y fueron ajustados por medio de un algoritmo genético.Dado el elevado número de pruebas a efectuar se decidió construir un simulador multicomputador con el que se realizaron más de 90000 ensayos. En cada uno de los ensayos se sometió a cada controlador mutante a la realización de un recorrido, de unos 20 minutos de duración máxima, sobre un suelo ligeramente ondulado. Con los datos obtenidos se generaron las curvas de fiabilidad por el procedimiento de Kaplan-Meier, lo cual permitió la comparación de controladores objetivo del estudio.De las curvas de fiabilidad del software obtenidas se deduce que, en las condiciones experimentales planteadas, el controlador LQR ofrece el mejor comportamiento, el segundo lugar le corresponde al controlador PID y el tercero al controlador borroso. Abstract: In this paper, three multivariable speed controllers (linear quadratic regulator-LQR, proportional integral derivative - PID, and Fuzzy were compared with each other to find which one has the best software reliability. The reliability tests were conducted on perturbed controllers with injected faults, simulating typical programmer errors. These controllers were designed to operate in an autonomous ground vehicle, and they were tuned by using a genetic algorithm. Given the large number of tests to be performed it was decided to build a multi-computer simulator in which they were carried out more than 90000 essays. In each of

  5. One-step synthesis of PbSe-ZnSe composite thin film

    Directory of Open Access Journals (Sweden)

    Abe Seishi

    2011-01-01

    Full Text Available Abstract This study investigates the preparation of PbSe-ZnSe composite thin films by simultaneous hot-wall deposition (HWD from multiple resources. The XRD result reveals that the solubility limit of Pb in ZnSe is quite narrow, less than 1 mol%, with obvious phase-separation in the composite thin films. A nanoscale elemental mapping of the film containing 5 mol% PbSe indicates that isolated PbSe nanocrystals are dispersed in the ZnSe matrix. The optical absorption edge of the composite thin films shifts toward the low-photon-energy region as the PbSe content increases. The use of a phase-separating PbSe-ZnSe system and HWD techniques enables simple production of the composite package.

  6. Avoidable Software Procurements

    Science.gov (United States)

    2012-09-01

    software license, software usage, ELA, Software as a Service , SaaS , Software Asset...PaaS Platform as a Service SaaS Software as a Service SAM Software Asset Management SMS System Management Server SEWP Solutions for Enterprise Wide...delivery of full Cloud Services , we will see the transition of the Cloud Computing service model from Iaas to SaaS , or Software as a Service . Software

  7. Propuesta pedagógica: Una metodología de desarrollo de software para la enseñanza universitaria

    OpenAIRE

    Estela Gottberg de Noguera; Gustavo Noguera Altuve; María Alejandra Noguera Gottberg

    2011-01-01

    El objetivo de este trabajo es describir una metodología para desarrollar software educativo. Se presenta de manera detallada los elementos asociados con la metodología de desarrollo de software, atendiendo a los requerimientos existentes en las metodologías seleccionadas para su creación. El principal aporte de la metodología propuesta es la utilización de algunas de las etapas de la metodología de Pere Marquès y de la metodología para el desarrollo de software educativo (DESED), siguiendo e...

  8. Software de autoria colaborativa de materiais educacionais para a TV digital

    Directory of Open Access Journals (Sweden)

    Marco Antonio Sandini Trentin

    2012-06-01

    Full Text Available O presente artigo tem como objetivo descrever o processo de desenvolvimento de um software de autoria colaborativa que proporcione aos professores, alunos e demais seres sociais envolvidos nos processos de ensino-aprendizagem escolares a possibilidade de produção de materiais educativos hipermídia para a TV Digital. Por meio da descrição dos aspectos técnicos e educacionais, os quais partem da relação interdisciplinar entre as áreas da Informática, Comunicação e Educação, torna-se possível delinear o progresso atual da pesquisa em torno do desenvolvimento deste software, denominado Guri.

  9. Metodologia design thinking no projeto de software para mobilidade urbana: relato de aplicação

    Directory of Open Access Journals (Sweden)

    Adailton Magalhaes Lima

    2015-03-01

    Full Text Available Introdução: Apresenta um relato da condução de um estudo onde se aplicou a metodologia Design Thinking no contexto do projeto de uma solução de software ao contexto de mobilidade urbana. Método: Dentre as técnicas sugeridas pela metodologia Design Thinking, este trabalho utilizou entrevistas, surveys, brainstorming e prototipação. O foco do estudo foram os transportes públicos e os processos intrínsecos a esse contexto. Resultados: Tem-se um projeto de solução aderente aos problemas identificados nas pesquisas de campo, e também uma avaliação conduzida com os usuários alvo sobre o projeto de solução proposto. Conclusão: A aplicação de Design Thinking pode ser eficiente no desenvolvimento de software, pois se tem nessa metodologia um direcionamento na elaboração de projetos centrada na construção de produtos voltados para atender as necessidades de seus usuários, ou seja, projeta-se a solução com base no quão usual o produto será para o usuário final.

  10. Software engineering

    CERN Document Server

    Sommerville, Ian

    2010-01-01

    The ninth edition of Software Engineering presents a broad perspective of software engineering, focusing on the processes and techniques fundamental to the creation of reliable, software systems. Increased coverage of agile methods and software reuse, along with coverage of 'traditional' plan-driven software engineering, gives readers the most up-to-date view of the field currently available. Practical case studies, a full set of easy-to-access supplements, and extensive web resources make teaching the course easier than ever.

  11. PRAPRAG: software para planejamento racional de máquinas agrícolas

    OpenAIRE

    Mercante,Erivelto; Souza,Eduardo G. de; Johann,Jerry A; Gabriel Filho,Antonio; Uribe-Opazo,Miguel A

    2010-01-01

    O software PRAPRAG é uma ferramenta de escolha de máquinas e implementos agrícolas que apresentam o menor custo por área ou por quantidade produzida, bem como, faz o planejamento de aquisição das máquinas para a propriedade agrícola, do ponto de vista técnico e econômico. Foi utilizada a linguagem de programação Borland Delphi 3.0 e, a partir de prospectos das máquinas e implementos, criou-se um banco de dados onde o usuário pode cadastrar e modificar suas características de uso. O software m...

  12. VizieR Online Data Catalog: Spectroscopy and HST imaging in ONC (O'Dell+, 2015)

    Science.gov (United States)

    O'Dell, C. R.; Ferland, G. J.; Henney, W. J.; Peimbert, M.; Garcia-Diaz, Ma. T.; Rubin, R. H.

    2016-02-01

    We are able to draw on both new and existing observational data for both imaging and spectroscopy. Since the ionization range of the Orion Nebula is quite low, we use the high signal-to-noise ratio (S/N) F658N and F502N images in our analysis Our new imaging observations were made with Hubble Space Telescope (HST)'s WFC3 as part of program GO 12543. Observations were made (2012 January 7) with the narrowband emission line filters F487N (Hβ409s), F502N ([OIII]348s), F656N (Hα349s), F658N ([NII]602s), and F673N ([SII]700s), in addition to observations with the continuum sampling intermediate-width filter F547M (348s). The characteristics of these filters and their calibration have been described by O'Dell et al. (2013AJ....145...92O). The images are the highest angular resolution (0.04''/pixel sampling) optical images of a portion of the Huygens Region. When used alone, we employed the original images in combination with one another. When used for comparison with earlier (undersampled) WFPC2 images (0.0996''/pixel), we processed them with IRAF task "Gauss" to match their broader image cores. We have been able to use earlier HST observations made with the WFPC2 (program GO 5085 (FOV5) on MJD49737; program GO 5469 on MJD49797; program GO 11038 (FOV1) on MJD54406; program GO 12543 on MJD55935). The most useful data set of spectra is the compilation of north-south orientation long-slit spectra by Garcia-Diaz et al. (2008RMxAA..44..181G). In addition to their original observations (Garcia-Diaz & Henney, 2007AJ....133..952G) in low-ionization lines, they recalibrate the high-ionization spectra of Doi et al. 2004 (cat. J/AJ/127/3456) and present combined results for emission lines from a wide variety of ionization states ([OI]630.0nm, [SII]671.6nm+673.1nm, [NII]658.4nm, [SIII]631.2nm, Hα656.3nm, [OIII]500.7nm) calibrated to 2km/s accuracy and a resolution of about 10km/s. We will refer to this as the Spectroscopic Atlas, or simply the Atlas. New observations were made at

  13. Reflexiones sobre una etnografía feminista del Software Libre en Colombia Insights on a feminist ethnography of the Free Software community in Colombia

    Directory of Open Access Journals (Sweden)

    Tania Pérez Bustos

    2010-08-01

    Full Text Available El presente artículo muestra las reflexiones etnográficas de una investigadora que indaga sobre el rol de un grupo de mujeres dentro de la comunidad del Software Libre en Colombia. Particularmente se problematizan las maneras en que la práctica etnográfica, desde las perspectivas feministas, contribuye en la (reconstrucción del género como una categoría analítica en las realidades sociales que estudia.The article presents the ethnographic insights of a woman researcher that investigates the role of a group of women inside the Free Software community in Colombia. Particularly the article questions how the ethnographic practice, from a feminist perspective, contributes to the (reconstruction of gender as an analytical category on the social realities it studies.

  14. Uso de software para análise de imagem em avaliação da cobertura de pulverização Using imagery analysis software for evaluation of spraying coverage

    Directory of Open Access Journals (Sweden)

    Márcio Carvalho Firveda

    2002-12-01

    Full Text Available O presente trabalho teve como objetivo avaliar a menor concentração do traçador fluorescente Poliglow 830 YLS, necessária para um suficiente contraste com a superfície vegetal, bem como desenvolver uma rotina para determinar a cobertura de pulverização no software para análise de imagens IDRISI. Para avaliação, misturaram-se, previamente, três doses de traçador fluorescente Poliglow 830 YLS (5, 12,5 e 25 g a 10 g de uma formulação de mancozeb, diluídas em 5 L de água (0,001, 0,0025 e 0,005% p.v. do traçador e aplicadas, com três diferentes tamanhos de gotas (muito grossa, fina e muito fina em Hibiscus spp. Após a completa secagem da calda, retiraram-se amostras de folhas, as quais foram levadas ao laboratório e analisadas sob luz ultravioleta; selecionou-se, visualmente, uma folha com deposição leve, média e pesada de cada um dos nove tratamentos. A menor dose do traçador proporcionou uma fluorescência bastante incipiente mesmo para análise visual. As demais folhas foram fotografadas com câmera digital, em ambiente totalmente escuro, sob iluminação ultravioleta. Assim, desenvolveu-se uma rotina de análise de imagens que permitiu a automatização das análises de cobertura. O software mostrou-se ferramenta adequada e eficiente na avaliação da cobertura de pulverização na superfície vegetal estudada. A maior concentração do traçador melhorou a sensibilidade da análise.The present work aimed to evaluate the smallest concentration of the tracer fluorescent Poliglow 830 YLS necessary for an adequate contrast with the plant surface, as well as to develop a process for determination of spraying coverage using the software IDRISI for imagery analysis. Three doses of the fluorescent tracer Poliglow 830 YLS (5, 12.5 and 25 g were previously mixed to 10 g of a mancozeb formulation, diluted in 5 L of water (0.001, 0.0025 e 0.005% w.v. of tracer and applied on Hibiscus spp, with three different sizes of drops (very

  15. Aplicação do método ágil scrum no desenvolvimento de produtos de software em uma pequena empresa de base tecnológica Implementation of scrum agile methodology in software product project in a small technology-based company

    Directory of Open Access Journals (Sweden)

    Bernardo Vasconcelos de Carvalho

    2012-01-01

    Full Text Available Este trabalho apresenta o resultado de uma pesquisa-ação, realizada em uma pequena empresa de base tecnológica, na qual se aplicou o método ágil Scrum em um projeto de desenvolvimento de um produto de software. A empresa objeto desta atua em Itajubá/MG e seus principais produtos são sistemas de software. Estudos indicam que a indústria de produção de software é ineficiente e ineficaz. E as micro e pequenas empresas de base tecnológica (MPEBT têm um desafio ainda maior devido aos seus recursos restritos. Além disso, os métodos tradicionais de desenvolvimento de produtos de softwares demandam muitos custos. Tendo em vista a importância estratégica das MPEBT no desenvolvimento regional, seria importante que o Scrum fosse compatível com seus processos, para que elas pudessem se tornar mais competitivas e usufruir de seus benefícios. O objetivo deste trabalho foi analisar a implantação do método ágil Scrum nos projetos de desenvolvimento de novos produtos de software de uma MPEBT, além de compreender e mensurar o impacto desta implantação na empresa. Concluiu-se que os resultados alcançados sugerem que o método melhorou a comunicação e aumentou a motivação do time, diminuiu o custo, o tempo e o risco do projeto e aumentou a produtividade da equipe. Com esses resultados alcançados, a organização tende a se tornar mais competitiva, pois a bem-sucedida gestão de desenvolvimento de produtos é ponto crucial para o sucesso de uma empresa de base tecnológica.This study presents the result of an action research that was carried out in a small technology-based company, in which the Scrum agile methodology was applied in software product project. The company object of this research operates in Itajubá/MG, and its main products are software systems. Studies have shown that the software industry is inefficient and ineffective. Micro and small technology-based companies have an even greater challenge, considering their

  16. Software educativo: estrategias didácticas de educación ambiental para el aprendizaje significativo de estudiantes

    Directory of Open Access Journals (Sweden)

    Marisela Estanga Barrios

    2015-10-01

    Full Text Available La investigación se guió por un diseño cuasiexperimental, que incluyó un grupo control y el grupo objeto del experimento propiamente dicho. Su propósito consistió en determinar el efecto de un software educativo de estrategias de enseñanza de educación ambiental en el aprendizaje significativo de los estudiantes del lnstituto Pedagógico de Barquisimeto. Aplicando una preprueba para la equivalencia entre los grupos del experimento, al grupo experimental se le administró luego el contenido del programa mediante un software educativo, y al control, mediante una clase tradicional. A continuación, se aplicó una postprueba, validada por expertos y con muy alta confiabilidad por el coeficiente de Kuder-Richardson: 0,83. Los datos, procesados aplicando t de Student, permitieron aceptar la hipótesis de trabajo y concluir que el aprendizaje significativo de los estudiantes del grupo experimental se logró. AbstractThe following research is based on a quasi-experimental design, supported by a field research, which involved an experimental group; as well as a control group. The purpose of this research was to determine the effect of educational software on teaching strategies for environmental education, in significant learning experiences for students at Instituto Pedagógico de Barquisimeto. Both groups were applied a preliminary test for the equivalence between them; after that, the experimental group was given the content of the program through educational software; whilst the control group was taught a traditional class. Subsequently, a test validated by experts and with high reliability by the Kuder-Richardson co-efficient: 0,83, was given to both groups. The analysis of data was developed applying the statistic “T” of "student", it allows to accept the working hypothesis, and finally conclude that significant learning was achieved by the students of the experimental group.

  17. Impact of Agile Software Development Model on Software Maintainability

    Science.gov (United States)

    Gawali, Ajay R.

    2012-01-01

    Software maintenance and support costs account for up to 60% of the overall software life cycle cost and often burdens tightly budgeted information technology (IT) organizations. Agile software development approach delivers business value early, but implications on software maintainability are still unknown. The purpose of this quantitative study…

  18. Software educativo para el desarrollo de habilidades práctico-profesionales en la asignatura de Ginecología y Obstetricia

    Directory of Open Access Journals (Sweden)

    Migdalia de las Mercedes Peña Abraham

    2015-02-01

    Full Text Available Introducción: las nuevas tecnologías de la información y las comunicaciones ocupan un lugar relevante en este nuevo modelo de formación médica. Objetivo: validar un software educativo diseñado para el desarrollo de habilidades práctico-profesionales para la asignatura de Ginecología y Obstetricia. Material y método: se realizó una investigación observacional y prospectiva de estudiantes de pregrado de la carrera de Medicina que rotaron en el primer semestre por la asignatura de Ginecología y Obstetricia en el Hospital General Docente "Abel Santamaría Cuadrado" de Pinar del Río, durante el curso escolar 2012-2013. La muestra estuvo constituida por 288 estudiantes de cuarto y sexto año a quienes se les realizó una encuesta antes y después de la aplicación del software. Resultados: se diseñó un software educativo constituido por tres partes fundamentales que incluye contenidos de Obstetricia, Ginecología y preguntas de autoevaluación con sus respuestas. La evaluación fue "antes" y "después" del software, la totalidad de los estudiantes refirieron comprensión de los contenidos presentados. Los estudiantes y profesores, con relación a la informatización de la asignatura, coinciden en que permite flexibilidad en el aprendizaje, es motivador y estimulador para el estudio, como medio de enseñanza ayuda a comprender la práctica habitual de la especialidad y la comunicación entre estudiantes y profesores. Conclusiones: el software diseñado proporciona a los estudiantes aprendizaje y autoevaluación continuos con un enfoque metodológico y didáctico útiles para reforzar el aprendizaje teórico y práctico de la asignatura. Su creación responde a una necesidad real que se satisface con la utilización de este medio de enseñanza.

  19. Aseguramiento de la calidad de software en la Sunat basado en la metodología MDSI

    OpenAIRE

    Tamayo Torres, Miguel Ángel; Tamayo Torres, Miguel Ángel

    2006-01-01

    La Intendencia Nacional de Sistemas de Información INSI no dispone de un proceso de aseguramiento de la calidad de Software, hoy en día la División de Control de Calidad DCC está encargada únicamente de las pruebas de los sistemas; un gran avance se produce cuando en el mes de Abril del 2005 se aprueba la Metodología de Desarrollo de Sistemas de Información MDSI la cual fue desarrollada por la Oficina de Ingeniería de Procesos de Sistemas OIPS. El presente informe se inicia con una descrip...

  20. Método Ágil aplicado ao desenvolvimento de software confiável baseado em componentes

    OpenAIRE

    Alan Braz

    2013-01-01

    Resumo: Os Métodos Ágeis, ou Desenvolvimento Ágil de Software (DAS), tem se popularizado, na última década, por meio de métodos como Extreme Programming (XP) e Scrum e isso fez com que fossem aplicadas no desenvolvimento de sistemas computacionais de diversos tamanhos, complexidades técnica e de domínio, e de rigor quanto à confiabilidade. Esse fato evidencia a necessidade de processos de desenvolvimento de software que sejam mais rigorosos e que possuam uma quantidade adequada de modelagem e...

  1. Clinical software development for the Web: lessons learned from the BOADICEA project.

    Science.gov (United States)

    Cunningham, Alex P; Antoniou, Antonis C; Easton, Douglas F

    2012-04-10

    Application version 1 was released for general use in November 2007. By May 2010, we had > 1200 registered users based in the UK, USA, Canada, South America, Europe, Africa, Middle East, SE Asia, Australia and New Zealand. We found that an evolutionary software process was effective when we developed the BOADICEA Web Application. The key clinical software development issues identified during the BOADICEA Web Application project were: software reliability, Web security, clinical data protection and user feedback.

  2. Software design practice using two SCADA software packages

    DEFF Research Database (Denmark)

    Basse, K.P.; Christensen, Georg Kronborg; Frederiksen, P. K.

    1996-01-01

    Typical software development for manufacturing control is done either by specialists with consideral real-time programming experience or done by the adaptation of standard software packages for manufacturing control. After investigation and test of two commercial software packages: "InTouch" and ......Touch" and "Fix", it is argued, that a more efficient software solution can be achieved by utilising an integrated specification for SCADA and PLC-programming. Experiences gained from process control is planned investigated for descrete parts manufacturing....

  3. NEUROEVAL: software para la autoevaluación de educandos en una escuela de medicina ghanesa NEUROEVAL: software for self-evaluation of students in a medical school of Ghana

    Directory of Open Access Journals (Sweden)

    Arnel Deynes Márquez

    2012-11-01

    Full Text Available Se efectuó un estudio de desarrollo tecnológico en la Universidad para Estudios del Desarrollo, en especial la Escuela de Medicina y Ciencias de la Salud de Tamale (Northern Region, Ghana, de enero a marzo del 2010, mediante la confección de un software educativo nombrado NEUROEVAL, que incluía el contenido impartido sobre el sistema nervioso central en las clases prácticas de Anatomía y serviría para la autoevaluación de los estudiantes, previo al examen final de cada sección. La eficacia del software se validó mediante encuestas a usuarios (n=15 y expertos (n=7, los cuales coincidieron al evaluarlo como útil (93,7 y 100,0 %, respectivamente. En cuanto a su diseño, los usuarios lo hallaron funcional y comprensible, mientras que los expertos refirieron que era simple. El contenido fue valorado como importante para ambos grupos. En fin, el aporte de esta herramienta informática al proceso docente fue satisfactorio.A technological development study was conducted at the University for Development Studies, especially School of Medicine and Health Sciences of Tamale (Northern Region, Ghana from January to March 2010, by means of an educational software named NEUROEVAL, including the content imparted on the central nervous system in Anatomy practical classes and it would serve for the self-evaluation of students before the final examination of each section. The effectiveness of the software was validated through users (n =15 and experts (n=7 surveys, who agreed to evaluate it as useful (93.7% and 100.0%, respectively. On terms of design, users found it functional and comprehensible, while experts reported that it was simple. The content was valued as important for both groups. Finally, the contribution of this computer tool to the educational process was satisfactory.

  4. Software reliability

    CERN Document Server

    Bendell, A

    1986-01-01

    Software Reliability reviews some fundamental issues of software reliability as well as the techniques, models, and metrics used to predict the reliability of software. Topics covered include fault avoidance, fault removal, and fault tolerance, along with statistical methods for the objective assessment of predictive accuracy. Development cost models and life-cycle cost models are also discussed. This book is divided into eight sections and begins with a chapter on adaptive modeling used to predict software reliability, followed by a discussion on failure rate in software reliability growth mo

  5. Educational software for scheduling nursing personnel: elaboration, development and application through the internet Software educativo sobre escala de personal de enfermería: elaboración, desarrollo y aplicación a través de la red Software educacional sobre escala de pessoal de enfermagem: elaboração, desenvolvimento e aplicação via internet

    Directory of Open Access Journals (Sweden)

    Carmen Maria Casquel Monti Juliani

    2007-08-01

    Full Text Available This study aimed to describe the development stages of software about Nursing Staff Scale, created to support teaching of the subject, as well as to serve as a consultation instrument for professional nurses, since it joins labor legislation, testimonies and simulation. The adopted methodology consisted of the planning and developmental phases, with various stages and professionals, as detailed in the article. Although the need for continuous updating of the system is recognized, the availability of a resource that is easily accessed through the world wide web is considered an advance in teaching and in nurses' management practice.El propósito de este estudio fue describir las etapas de desarrollo de un software sobre el tema Escala de Personal de Enfermería, creado para subsidiar la enseñanza del tema, bien como servir de instrumento de consulta a los profesionales enfermeros, ya que reúne, entre otros tópicos, la legislación laboral, testimonios y simulación. La metodología utilizada se constituyó de las fases de planeamiento y desarrollo, que involucró varias etapas y profesionales, conforme detallado en el artículo. Aunque se reconoce la necesidad de actualización permanente del sistema, se considera un avance, en la enseñanza y en la práctica gerencial de los enfermeros, poder contar con un recurso al cual se puede acceder fácilmente en la amplia red mundial de computadoras.O propósito deste estudo foi descrever as etapas de desenvolvimento de um software sobre o tema Escala de Pessoal de Enfermagem, criado para subsidiar o ensino do tema, bem como servir de instrumento de consulta aos profissionais enfermeiros, uma vez que reúne, dentre outros tópicos, a legislação trabalhista, depoimentos e simulação. A metodologia utilizada constituiu-se das fases de planejamento e desenvolvimento, sendo que essa última envolveu várias etapas e profissionais, conforme detalhado no artigo. Embora se reconheça a necessidade de

  6. Processo Inovativo na Indústria de Software de Joinville (SC: uma análise a partir do marco teórico neo-schumpeteriano

    Directory of Open Access Journals (Sweden)

    Sílvio Antônio Ferraz Cário

    2009-03-01

    Full Text Available In order to better understand the processes of generation and dissemination of innovation in developing countries, this paper analyzes, based on the neoshumpeterian local innovation system framework, the innovative processes of Joinville’s software industry. The use of this framework allowed the identification of many organizations and institutions that promoted the local software industry. In such a way, it was possible to determine the existence of a local innovation system in the software industry of Joinville. However, as noted on the interviews applied to selected firms, this is still an immature system, in which 1 companies barely interact with each other and with academic research; 2 the local legislation of promotion of the industry is unknown; 3 the competitiveness of local companies is based on the price of qualified labor. Even still immature, the identified innovation system has important Latin-American producers of package software, a large number of firms engaged in the sector of software services and many software organizations with relevant potential for he whole of innovation system.Considerando a necessidade de melhor compreender os processos de geração e difusão de inovações em países em desenvolvimento, este trabalho foi confeccionado com o objetivo de analisar a dinâmica inovativa da indústria de software geograficamente circunscrita pelos entornos do município de Joinville (SC. Para tanto, utilizou-se como ferramenta de análise e descrição o arcabouço teórico neo-schumpeteriano de sistemas locais de inovação. A utilização desse arcabouço permitiu mapear as diferentes organizações e instituições de fomento à referida indústria local. Nesse sentido, permite-se falar em sistema local de inovação da indústria de software de Joinville. Contudo, como se constatou em entrevistas a firmas selecionadas, trata-se de um sistema ainda imaturo, no qual: 1 as firmas pouco interagem entre si e com a pesquisa

  7. Software Epistemology

    Science.gov (United States)

    2016-03-01

    in-vitro decision to incubate a startup, Lexumo [7], which is developing a commercial Software as a Service ( SaaS ) vulnerability assessment...LTS Label Transition System MUSE Mining and Understanding Software Enclaves RTEMS Real-Time Executive for Multi-processor Systems SaaS Software ...as a Service SSA Static Single Assignment SWE Software Epistemology UD/DU Def-Use/Use-Def Chains (Dataflow Graph)

  8. A catedral, o bazar e o condomínio: um ensaio sobre o modelo de negócio do software livre The cathedral, the bazaar and the condominium: an essay on a business model of free open source software

    Directory of Open Access Journals (Sweden)

    Guilherme Finkelfarb Lichand

    2008-03-01

    Full Text Available Este ensaio tem como objetivo apresentar o software livre como objeto viável de estratégia de comercialização no mercado de software. A partir da análise de seus efeitos sobre as receitas e o market share das firmas dominantes, o F/LOSS (Free/Libre Open Source Software emerge como alternativa de modelo de negócio nos segmentos em que o software livre apresenta vantagens competitivas sobre o software proprietário. Descrevemos as potencialidades e limitações, os aspectos tecnológicos, econômicos e sociológicos da organização da produção de empresas que comercializam produtos ou serviços relacionados ao F/LOSS. Utilizando-se a perspectiva da Economia dos Custos de Transação e da Economia da Informação, apresenta-se o modelo híbrido de desenvolvimento do F/LOSS nos mesmos moldes de um condomínio - em que a administração central coordena a ação coletiva, enquanto a comunidade, ao mesmo tempo em que integra o processo, monitora as ações da direção centralizada -, como estratégia competitiva alternativa aos modelos de desenvolvimento aberto (Bazar e proprietário (Catedral.Free Open Source Software is described as viable software for commercialization. Considering the revenues and market shares of the dominant suppliers, this software emerges as an alternative business model for segments in which open source software presents competitive advantages over the traditional model. Potentials, limitations and technological, economic and sociological aspects of organizational structures of companies that produce products and services related to Free Open Source Software are described. From the transaction cost and information economy perspectives, a hybrid model to develop Free Open Source Software is presented which is structured according to the concept of a condominium. That is, a central administration coordinates collective action, while the community works and monitors the action of the central direction. This model may

  9. Aplicación del modelo mgrsoft en la reutilización de revisiones a requsitos de software

    Directory of Open Access Journals (Sweden)

    Martha Dunia Delgado Dapena

    2010-04-01

    Full Text Available En este trabajo se presentan las experiencias de la implementación de un Modelo para la Gestión de Revisiones (MGRSoft, haciendo énfasis en la utilización de mecanismos de reuti-lización para las revisiones de los requisitos a nuevos proyectos de software. Se exponen las características de una herramienta que reutiliza revisiones anteriores y su utilización dentro del modelo MGRSoft. Se presentan, además, los resultados obtenidos en una prueba rea-lizada a proyectos reales, que evidencia el aprovechamiento de la experiencia acumulada utilizando los mecanismos de reutilización incluidos en el modelo. This paper presents the implementation experiences of the Manage Revisions Model (MGR-Soft, making emphasis in the use of reutilization mechanisms for revisions to requirements in new software projects. It includes the characteristics of a tool that reuse previous revisions and its use inside the MGRSoft model. The results of the results of a test on real projects, which demonstrates the use of experience using the reuse mechanisms included in the mo-del.

  10. Computer software.

    Science.gov (United States)

    Rosenthal, L E

    1986-10-01

    Software is the component in a computer system that permits the hardware to perform the various functions that a computer system is capable of doing. The history of software and its development can be traced to the early nineteenth century. All computer systems are designed to utilize the "stored program concept" as first developed by Charles Babbage in the 1850s. The concept was lost until the mid-1940s, when modern computers made their appearance. Today, because of the complex and myriad tasks that a computer system can perform, there has been a differentiation of types of software. There is software designed to perform specific business applications. There is software that controls the overall operation of a computer system. And there is software that is designed to carry out specialized tasks. Regardless of types, software is the most critical component of any computer system. Without it, all one has is a collection of circuits, transistors, and silicone chips.

  11. DISSECTING THE POWER SOURCES OF LOW-LUMINOSITY EMISSION-LINE GALAXY NUCLEI VIA COMPARISON OF HST-STIS AND GROUND-BASED SPECTRA

    Energy Technology Data Exchange (ETDEWEB)

    Constantin, Anca; Castillo, Christopher A. [Department of Physics and Astronomy, James Madison University, Harrisonburg, VA 22807 (United States); Shields, Joseph C. [Department of Physics and Astronomy, Ohio University, Athens, OH 45701 (United States); Ho, Luis C. [Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871 (China); Barth, Aaron J. [Department of Physics and Astronomy, University of California, Irvine, CA 92697-4575 (United States); Filippenko, Alexei V. [Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States)

    2015-12-01

    Using a sample of ∼100 nearby line-emitting galaxy nuclei, we have built the currently definitive atlas of spectroscopic measurements of Hα and neighboring emission lines at subarcsecond scales. We employ these data in a quantitative comparison of the nebular emission in Hubble Space Telescope (HST) and ground-based apertures, which offer an order-of-magnitude difference in contrast, and provide new statistical constraints on the degree to which transition objects and low-ionization nuclear emission-line regions (LINERs) are powered by an accreting black hole at ≲10 pc. We show that while the small-aperture observations clearly resolve the nebular emission, the aperture dependence in the line ratios is generally weak, and this can be explained by gradients in the density of the line-emitting gas: the higher densities in the more nuclear regions potentially flatten the excitation gradients, suppressing the forbidden emission. The transition objects show a threefold increase in the incidence of broad Hα emission in the high-resolution data, as well as the strongest density gradients, supporting the composite model for these systems as accreting sources surrounded by star-forming activity. The narrow-line LINERs appear to be the weaker counterparts of the Type 1 LINERs, where the low accretion rates cause the disappearance of the broad-line component. The enhanced sensitivity of the HST observations reveals a 30% increase in the incidence of accretion-powered systems at z ≈ 0. A comparison of the strength of the broad-line emission detected at different epochs implies potential broad-line variability on a decade-long timescale, with at least a factor of three in amplitude.

  12. Enabling HST UV Exploration of the Low Surface Brightness Universe: A Pilot Study with the WFC3 X Filter Set

    Science.gov (United States)

    Thilker, David

    2017-08-01

    We request 17 orbits to conduct a pilot study to examine the effectiveness of the WFC3/UVIS F300X filter for studying fundamental problems in star formation in the low density regime. In principle, the broader bandpass and higher throughput of F300X can halve the required observing time relative to F275W, the filter of choice for studying young stellar populations in nearby galaxies. Together with F475W and F600LP, this X filter set may be as effective as standard UVIS broadband filters for characterizing the physical properties of such populations. We will observe 5 low surface brightness targets with a range of properties to test potential issues with F300X: the red tail to 4000A and a red leak beyond, ghosts, and the wider bandpass. Masses and ages of massive stars, young star clusters, and clumps derived from photometry from the X filter set will be compared with corresponding measurements from standard filters. Beyond testing, our program will provide the first sample spanning a range of LSB galaxy properties for which HST UV imaging will be obtained, and a glimpse into the ensemble properties of the quanta of star formation in these strange environments. The increased observing efficiency would make more tractable programs which require several tens to hundreds of orbits to aggregate sufficient numbers of massive stars, young star clusters, and clumps to build statistical samples. We are hopeful that our pilot observations will broadly enable high-resolution UV imaging exploration of the low density frontier of star formation while HST is still in good health.

  13. Charge deposition model for investigating SE-microdose effect in trench power MOSFETs

    International Nuclear Information System (INIS)

    Wan Xin; Zhou Weisong; Liu Daoguang; Bo Hanliang; Xu Jun

    2015-01-01

    It was demonstrated that heavy ions can induce large current—voltage (I–V) characteristics shift in commercial trench power MOSFETs, named single event microdose effect (SE-microdose effect). A model is presented to describe this effect. This model calculates the charge deposition by a single heavy ion hitting oxide and the subsequent charge transport under an electric field. Holes deposited at the SiO 2 /Si interface by a Xe ion are calculated by using this model. The calculated results were then used in Sentaurus TCAD software to simulate a trench power MOSFET's I–V curve shift after a Xe ion has hit it. The simulation results are consistent with the related experiment's data. In the end, several factors which affect the SE-microdose effect in trench power MOSFETs are investigated by using this model. (paper)

  14. Validation of software for calculating the likelihood ratio for parentage and kinship.

    Science.gov (United States)

    Drábek, J

    2009-03-01

    Although the likelihood ratio is a well-known statistical technique, commercial off-the-shelf (COTS) software products for its calculation are not sufficiently validated to suit general requirements for the competence of testing and calibration laboratories (EN/ISO/IEC 17025:2005 norm) per se. The software in question can be considered critical as it directly weighs the forensic evidence allowing judges to decide on guilt or innocence or to identify person or kin (i.e.: in mass fatalities). For these reasons, accredited laboratories shall validate likelihood ratio software in accordance with the above norm. To validate software for calculating the likelihood ratio in parentage/kinship scenarios I assessed available vendors, chose two programs (Paternity Index and familias) for testing, and finally validated them using tests derived from elaboration of the available guidelines for the field of forensics, biomedicine, and software engineering. MS Excel calculation using known likelihood ratio formulas or peer-reviewed results of difficult paternity cases were used as a reference. Using seven testing cases, it was found that both programs satisfied the requirements for basic paternity cases. However, only a combination of two software programs fulfills the criteria needed for our purpose in the whole spectrum of functions under validation with the exceptions of providing algebraic formulas in cases of mutation and/or silent allele.

  15. Proposta de um software-protótipo para uso na assistência a pacientes com cateter central de inserção periférica (PICC Proposal for a software-prototype to assist patients with peripherally inserted central catheter (PICC

    Directory of Open Access Journals (Sweden)

    Luiz Célio Martins Freitas

    2017-04-01

    Full Text Available Objetivo: Propor um software-protótipo como estratégia para melhorar o processo de comunicação e os registros relativos ao cuidado de enfermagem a pacientes com cateter central de inserção periférica (PICC e descrever os passos para a construção de um protótipo de software. Método: Utilizou-se da Pesquisa de Intervenções, na modalidade de Processo de Intervenção e como método de operacionalização a Prototipação associados a instrumentos de informática. Resultado: Foi criado um modelo computadorizado de interface gráfica simples e projetado para uso em redes abertas ou fechadas. Conclusão: O desenvolvimento do software-protótipo para funcionar em rede web tornará o processo de implantação mais prático. Acrescenta-se que validação com equipe de saúde será realizada antes da utilização.

  16. Structure and optical properties of GaSe-CdSe composites driven by Cd intercalation in GaSe lamellar crystals

    International Nuclear Information System (INIS)

    Caraman, Iuliana; Kantser, Valeriu; Evtodiev, Igor; Untila, Dumitru; Dmitroglo, Liliana; Leontie, Liviu; Arzumanyan, Grigory

    2015-01-01

    A new composite material composed of GaSe and CdSe has been obtained by treatment of GaSe single-crystal lamellas in Cd vapors at temperatures of 773-853 K and intercalation of Cd interlayers. The structure and optical properties of the GaSe-CdSe composite material have been studied. The content of CdSe crystallites was found to grow with increasing treatment temperature or with increasing duration of treatment at a constant temperature. Analysis of XRD, PL, XPS, AFM, and Raman patterns has shown that the heterogeneous composite composed of micro and nanocrystallites of CdSe in GaSe can be obtained by Cd intercalation in a temperature range of 753-853 K. On the basis of Raman spectrum, the vibrational modes of the composite have been identified. The PL of these materials contains emission bands of free and bound excitons, donor-acceptor bands, and bands of recombination via impurity levels. The PL emission spectra measured at a temperature of 78 and 300 K for the composites result from the overlapping of the emission bands of the components of GaSe doped with Cd and the CdSe crystallites. (authors)

  17. Monitoring of the Crab Nebula with Chandra and Other Observatories Including HST

    Science.gov (United States)

    Weisskopf, Martin C.

    2014-01-01

    Subsequent to the detections AGILE and Fermi/LAT of the gamma-ray flares from the Crab Nebula in the fall of 2010, this team has been monitoring the X-Ray emission from the Crab on a regular basis. X-Ray observations have taken place typically once per month when viewing constraints allow and more recently four times per year. There have been notable exceptions, e.g. in April of 2011 and March 2013 when we initiated a set of Chandra Target of opportunity observations in conjunction with bright gamma-ray flares. For much of the time regular HST observations were made in conjunction with the Chandra observations. The aim of this program to further characterize, in depth, the X-Ray and optical variations that take place in the nebula, and by so doing determine the regions which contribute to the harder X-ray variations and, if possible, determine the precise location within the Nebula of the origin of the gamma-ray flares. As part of this project members of the team have developed Singular Value Decomposition techniques to sequences of images in order to more accurately characterize features. The current status of the project will be presented highlighting studies of the inner knot and possible correlations with the flares.

  18. Large-scale Star-formation-driven Outflows at 1 3D-HST Survey

    Science.gov (United States)

    Lundgren, Britt F.; Brammer, Gabriel; van Dokkum, Pieter; Bezanson, Rachel; Franx, Marijn; Fumagalli, Mattia; Momcheva, Ivelina; Nelson, Erica; Skelton, Rosalind E.; Wake, David; Whitaker, Katherine; da Cunha, Elizabete; Erb, Dawn K.; Fan, Xiaohui; Kriek, Mariska; Labbé, Ivo; Marchesini, Danilo; Patel, Shannon; Rix, Hans Walter; Schmidt, Kasper; van der Wel, Arjen

    2012-11-01

    We present evidence of large-scale outflows from three low-mass (log(M */M ⊙) ~ 9.75) star-forming (SFR > 4 M ⊙ yr-1) galaxies observed at z = 1.24, z = 1.35, and z = 1.75 in the 3D-HST Survey. Each of these galaxies is located within a projected physical distance of 60 kpc around the sight line to the quasar SDSS J123622.93+621526.6, which exhibits well-separated strong (W λ2796 r >~ 0.8 Å) Mg II absorption systems matching precisely to the redshifts of the three galaxies. We derive the star formation surface densities from the Hα emission in the WFC3 G141 grism observations for the galaxies and find that in each case the star formation surface density well exceeds 0.1 M ⊙ yr-1 kpc-2, the typical threshold for starburst galaxies in the local universe. From a small but complete parallel census of the 0.65 0.8 Å Mg II covering fraction of star-forming galaxies at 1 0.4 Å Mg II absorbing gas around star-forming galaxies may evolve from z ~ 2 to the present, consistent with recent observations of an increasing collimation of star-formation-driven outflows with time from z ~ 3.

  19. Firework Madness: aplicando los métodos de un ingeniero de software al desarrollo de videojuegos

    OpenAIRE

    Pérez Alonso, Rubén

    2016-01-01

    Este trabajo se basa en la aplicación de métodos de desarrollo estructurado de software aprendidos durante la carrera en el ámbito del desarrollo de videojuegos, el cual por su juventud escasea de éstos. Idioma castellano.

  20. MODELO DE BLOQUES PARA UN YACIMIENTO DE SULFUROS MASIVOS UTILIZANDO EL SOFTWARE MINESIGHT®

    OpenAIRE

    SEPÚLVEDA SEPÚLVEDA, GIOVANNI FRANCO; GALLO SIERRA, ADRIÁN FELIPE

    2011-01-01

    El objetivo de este trabajo es definir un modelo de bloques de un yacimiento hipotético de sulfuros masivos utilizando MineSight®, basado en la interpretación geológica, la viabilidad, planificación estratégica y la programación de los procesos a largo y corto plazo de las alternativas de producción y la capacidad requerida de la mina. Primero se presentan una descripción de los software minero más representativos del mercado en cuanto a la planeación minera, después se presentan las generali...

  1. Stable and metastable phases in reciprocal systems PbSe + Ag2I2 Ag2Se + PbI2 and PbSe + CdI2 = CdSe + PbI2

    International Nuclear Information System (INIS)

    Odin, I.N.; Grin'ko, V.V.; Kozlovskij, V.F.; Safronov, E.V.

    2005-01-01

    Mutual system PbSe + Ag 2 I 2 = Ag 2 Se + PbI 2 is investigated. It is shown that diagonal Ag 2 Se-PbI 2 is stable. Liquidus surface and isothermal section at 633 K of phase diagram of PbSe-Ag 2 Se-PbI 2 system are built. Transformations directing to crystallization metastable ternary compound forming in PbSe-PbI 2 system and metastable polytype modifications of lead iodide in PbSe-Ag 2 Se-PbI 2 system at 620-685 K are studied. By hardening from molten state (1150-1220 K) new interstitial metastable phases crystallizing in CdCl 2 structural type are obtained in PbSe-Ag 2 Se-PbI 2 and PbSe + CdI 2 = CdSe + PbI 2 systems [ru

  2. Pesquisa de clima organizacional em empresas de desenvolvimento de software de Blumenau – SC

    Directory of Open Access Journals (Sweden)

    Simone Cristina Aléssio

    2010-08-01

    Full Text Available O objetivo deste trabalho é estudar a influência das variáveis que compõem o Clima Organizacional em ambientes de desenvolvimento de software do município de Blumenau, SC, com o propósito de analisar as relações existentes nestes ambientes de trabalho. Parte-se do pressuposto de que as pessoas são as figuras mais importantes em uma organização, e o modo como se sente é fundamental para o equilíbrio de todos. Por isso, enfoca-se bastante a questão da cultura organizacional, que influencia diretamente o comportamento individual e coletivo dos colaboradores, sendo determinante no Clima Organizacional. Para isso, foi realizada uma pesquisa, levando-se em consideração fatores internos e externos que podem ter influência sobre o Clima Organizacional. Utilizou-se um questionário com 55 perguntas, retiradas do modelo de Carlos Alberto Ferreira Bispo (2006, aplicado em 12 empresas, das 20 selecionadas.

  3. Software engineering laboratory series: Annotated bibliography of software engineering laboratory literature

    Science.gov (United States)

    Morusiewicz, Linda; Valett, Jon

    1992-01-01

    This document is an annotated bibliography of technical papers, documents, and memorandums produced by or related to the Software Engineering Laboratory. More than 100 publications are summarized. These publications cover many areas of software engineering and range from research reports to software documentation. This document has been updated and reorganized substantially since the original version (SEL-82-006, November 1982). All materials have been grouped into eight general subject areas for easy reference: (1) the Software Engineering Laboratory; (2) the Software Engineering Laboratory: Software Development Documents; (3) Software Tools; (4) Software Models; (5) Software Measurement; (6) Technology Evaluations; (7) Ada Technology; and (8) Data Collection. This document contains an index of these publications classified by individual author.

  4. Synthesis and characterization of ZnSe:Fe/ZnSe core/shell nanocrystals

    Energy Technology Data Exchange (ETDEWEB)

    Yang, Lin; Zhu, Jianguo, E-mail: yanglin_1028@163.com; Xiao, Dingquan

    2014-04-15

    High-quality ZnSe:Fe/ZnSe core/shell nanocrystals were prepared via a hydrothermal microemulsion technique. Effective surface passivation of monodisperse ZnSe:Fe nanocrystals is achieved by overcoating them with a ZnSe shell. The samples were characterized by means of XRD, EDX, TEM, PSD, XPS, photoluminescence, and Raman spectrum. The results show that the as-synthesized nanocrystals are cubic zinc blende ZnSe structure with high purity and the average particle size of ZnSe:Fe/ZnSe core/shell nanocrystal is larger than that of ZnSe:Fe core. The growth of ZnSe shell causes a small red shift in PL spectra, and then the PL quantum yield (QY) increases from 16% before shell growth to the maximum of 37% after increasing shell thickness up to 1.2 monolayers (ML). Moreover, both transverse optic (TO) and longitudinal optic (LO) phonon modes of ZnSe are shifted toward lower frequency as compared with the reported ones. -- Highlights: • ZnSe:Fe/ZnSe core/shell QDs were prepared by a hydrothermal microemulsion method. • ZnSe shell efficiently passivates surface defects by serving as a physical barrier. • The particle size and PL properties can be turned with the growth of ZnSe shell. • The luminescence efficiency and stability of QDs could be improved in this manner.

  5. Ingeniería de software en crecimiento: enfoque conceptual y metodológico, y herramientas

    OpenAIRE

    Vilallonga, Gabriel Domingo; Berón, Mario; Sanchez, Alejandro; Moreno, Juan Pablo; Acosta Parra, Carlos Alberto

    2013-01-01

    Las temáticas abordas por la Ingeniería de Software (IS) abarca problemas que van desde la gestión del proyecto de desarrollo de software, hasta el mantenimiento del producto resultante. Los desafíos de la IS se encuentran en los entornos de ejecución heterogéneos y de diferentes plataformas, los tiempos de entrega de los sistemas, y la continua evolución hacia sistemas de computación extremadamente grandes, altamente dinámicos y heterogéneos que desafían los fundamentos, modelos y herramient...

  6. Software Engineering Guidebook

    Science.gov (United States)

    Connell, John; Wenneson, Greg

    1993-01-01

    The Software Engineering Guidebook describes SEPG (Software Engineering Process Group) supported processes and techniques for engineering quality software in NASA environments. Three process models are supported: structured, object-oriented, and evolutionary rapid-prototyping. The guidebook covers software life-cycles, engineering, assurance, and configuration management. The guidebook is written for managers and engineers who manage, develop, enhance, and/or maintain software under the Computer Software Services Contract.

  7. From Software Development to Software Assembly

    NARCIS (Netherlands)

    Sneed, Harry M.; Verhoef, Chris

    2016-01-01

    The lack of skilled programming personnel and the growing burden of maintaining customized software are forcing organizations to quit producing their own software. It's high time they turned to ready-made, standard components to fulfill their business requirements. Cloud services might be one way to

  8. Aplicativo de soporte para la valoración de modelos y estándares de calidad para el proceso de software

    OpenAIRE

    Moralejo, Raúl O.; Dumit Muñoz, Nerina Claudia; Mercado, Gustavo; Taffernaberry, Juan Carlos; Pérez, Santiago; Navarría, Salvador; Catena, Franco; Verena, Vicencio; Micca Longo, Andrea; Jáuregui, María; Vidal, Jessica

    2009-01-01

    En los últimos años han aparecido un gran número de estándares y propuestas internacionales y regionales relacionadas con mejora de procesos software (SPI) para micro y pequeñas empresas software (VSEs). Esto evidencia el creciente interés en la comunidad de Ingeniería de Software en abordar el tema de SPI para VSEs. Este creciente interés se suscita porque la industria del software en la mayoría de los países está formada en gran parte por este tipo de empresas. Es importante entonces fortal...

  9. Radio jets in NGC 4151: where eMERLIN meets HST

    Science.gov (United States)

    Williams, D. R. A.; McHardy, I. M.; Baldi, R. D.; Beswick, R. J.; Argo, M. K.; Dullo, B. T.; Knapen, J. H.; Brinks, E.; Fenech, D. M.; Mundell, C. G.; Muxlow, T. W. B.; Panessa, F.; Rampadarath, H.; Westcott, J.

    2017-12-01

    We present high-sensitivity eMERLIN radio images of the Seyfert galaxy NGC 4151 at 1.51 GHz. We compare the new eMERLIN images to those from archival MERLIN observations in 1993 to determine the change in jet morphology in the 22 yr between observations. We report an increase by almost a factor of 2 in the peak flux density of the central core component, C4, thought to host the black hole, but a probable decrease in some other components, possibly due to adiabatic expansion. The core flux increase indicates an active galactic nucleus (AGN) that is currently active and feeding the jet. We detect no significant motion in 22 yr between C4 and the component C3, which is unresolved in the eMERLIN image. We present a spectral index image made within the 512 MHz band of the 1.51 GHz observations. The spectrum of the core, C4, is flatter than that of other components further out in the jet. We use HST emission-line images (H α, [O III] and [O II]) to study the connection between the jet and the emission-line region. Based on the changing emission-line ratios away from the core and comparison with the eMERLIN radio jet, we conclude that photoionization from the central AGN is responsible for the observed emission-line properties further than 4 arcsec (360 pc) from the core, C4. Within this region, a body of evidence (radio-line co-spatiality, low [O III]/H α and estimated fast shocks) suggests additional ionization from the jet.

  10. A Software Reuse Approach and Its Effect On Software Quality, An Empirical Study for The Software Industry

    OpenAIRE

    Mateen, Ahmed; Kausar, Samina; Sattar, Ahsan Raza

    2017-01-01

    Software reusability has become much interesting because of increased quality and reduce cost. A good process of software reuse leads to enhance the reliability, productivity, quality and the reduction of time and cost. Current reuse techniques focuses on the reuse of software artifact which grounded on anticipated functionality whereas, the non-functional (quality) aspect are also important. So, Software reusability used here to expand quality and productivity of software. It improves overal...

  11. Software quality assurance: in large scale and complex software-intensive systems

    NARCIS (Netherlands)

    Mistrik, I.; Soley, R.; Ali, N.; Grundy, J.; Tekinerdogan, B.

    2015-01-01

    Software Quality Assurance in Large Scale and Complex Software-intensive Systems presents novel and high-quality research related approaches that relate the quality of software architecture to system requirements, system architecture and enterprise-architecture, or software testing. Modern software

  12. Great software debates

    CERN Document Server

    Davis, A

    2004-01-01

    The industry’s most outspoken and insightful critic explains how the software industry REALLY works. In Great Software Debates, Al Davis, shares what he has learned about the difference between the theory and the realities of business and encourages you to question and think about software engineering in ways that will help you succeed where others fail. In short, provocative essays, Davis fearlessly reveals the truth about process improvement, productivity, software quality, metrics, agile development, requirements documentation, modeling, software marketing and sales, empiricism, start-up financing, software research, requirements triage, software estimation, and entrepreneurship.

  13. Measurement of 76Se and 78Se (γ, n) cross sections

    International Nuclear Information System (INIS)

    Kitatani, Fumito; Harada, Hideo; Goko, Shinji; Utsunomiya, Hiroaki; Akimune, Hidetoshi; Toyokawa, Hiroyuki; Yamada, Kawakatsu

    2011-01-01

    The (γ, n) cross sections of Se isotopes ( 76 Se, 78 Se) were measured to supply fundamental data for estimating the inverse reaction cross section, i.e., the 79 Se(n, γ) 80 Se cross section. The enriched samples and a reference 197 Au sample were irradiated with laser-Compton scattering (LCS) γ-rays. The excitation function of each (γ, n) cross section was determined for the energy range from each near neutron separation energy to the threshold energy of (γ, 2n) reaction. The energy point corresponding to each cross section was deduced using the accurately determined energy distribution of LCS γ-rays. Systematic (γ, n) cross sections for Se isotopes including 80 Se were compared with those calculated by using a statistical model calculation code TALYS. (author)

  14. Thermoelectric prospects of chemically deposited PbSe and SnSe thin films

    Science.gov (United States)

    Nair, P. K.; Martínez, Ana Karen; Rosa García Angelmo, Ana; Barrios Salgado, Enue; Nair, M. T. S.

    2018-03-01

    Thin films of PbSe of 400-600 nm in thickness, were obtained via chemical deposition from a solution containing lead nitrate, thiourea and selenosufate. SnSe thin films of 90-180 nm in thickness, were also obtained by chemical deposition from a solution containing selenosulfate. Optical and electrical properties of these thin films were significantly altered by heating them in selenium vapor at 300 °C. Thin film PbSe has a bandgap (Eg) of 1.17 eV (direct gap, forbidden transitions), which decreases to 0.77 eV when it has been heated. Its electrical conductivity (σ) is p-type: 0.18 Ω-1 cm-1 (as-prepared), and 6.4 Ω-1 cm-1 when heated. Thin film SnSe is of orthorhombic crystalline structure which remains stable when heated at 300 °C, but its Eg increases from 1.12 eV (indirect) in as-prepared film to 1.5 eV (direct, forbidden transitions) upon heating. Its electrical conductivity is p-type, which increases from 0.3 Ω-1 cm-1 (as-prepared) to 1 Ω-1 cm-1 when heated (without Se-vapor). When SnSe film is heated at 300 °C in the presence of Se-vapor, they transform to SnSe2, with Eg of 1.5 eV (direct, forbidden) with n-type electrical conductivity, 11 Ω-1 cm-1. The Seebeck coefficient for the PbSe films is: +0.55 mV K-1 (as prepared) and +0.275 mV K-1 (heated); for SnSe films it is: +0.3 mV K-1 (as prepared) and +0.20 mV K-1 (heated); and for SnSe2 film, - 0.35 mV K-1. A five-element PbSe-SnSe2-PbSe-SnSe2-PbSe thermoelectric device demonstrated 50 mV for a temperature difference ΔT = 20 °C (2.5 mV K-1). For SnSe-SnSe2-SnSe-SnSe2-SnSe device, the value is 15 mV for ΔT = 20 °C (0.75 mV K-1). Prospect of these thin films in thermoelectric devices of hybrid materials, in which the coatings may be applied on distinct substrate and geometries is attractive.

  15. Model-Based Software Testing for Object-Oriented Software

    Science.gov (United States)

    Biju, Soly Mathew

    2008-01-01

    Model-based testing is one of the best solutions for testing object-oriented software. It has a better test coverage than other testing styles. Model-based testing takes into consideration behavioural aspects of a class, which are usually unchecked in other testing methods. An increase in the complexity of software has forced the software industry…

  16. Software Atom: An approach towards software components structuring to improve reusability

    Directory of Open Access Journals (Sweden)

    Muhammad Hussain Mughal

    2017-12-01

    Full Text Available Diversity of application domain compelled to design sustainable classification scheme for significantly amassing software repository. The atomic reusable software components are articulated to improve the software component reusability in volatile industry.  Numerous approaches of software classification have been proposed over past decades. Each approach has some limitations related to coupling and cohesion. In this paper, we proposed a novel approach by constituting the software based on radical functionalities to improve software reusability. We analyze the element's semantics in Periodic Table used in chemistry to design our classification approach, and present this approach using tree-based classification to curtail software repository search space complexity and further refined based on semantic search techniques. We developed a Global unique Identifier (GUID for indexing the functions and related components. We have exploited the correlation between chemistry element and software elements to simulate one to one mapping between them. Our approach is inspired from sustainability chemical periodic table. We have proposed software periodic table (SPT representing atomic software components extracted from real application software. Based on SPT classified repository tree parsing & extraction to enable the user to program their software by customizing the ingredients of software requirements. The classified repository of software ingredients assist user to exploits their requirements to software engineer and enable requirement engineer to develop a rapid large-scale prototype with great essence. Furthermore, we would predict the usability of the categorized repository based on feedback of users.  The continuous evolution of that proposed repository will be fine-tuned based on utilization and SPT would be gradually optimized by ant colony optimization techniques. Succinctly would provoke automating the software development process.

  17. SOFTWARE COMO SERVICIO DE CITAS MÉDICAS EN LÍNEA, UN MODELO APLICADO A LA SALUD

    Directory of Open Access Journals (Sweden)

    Walter Daniel Zambrano Romero

    2015-06-01

    Full Text Available Con la intención de mejorar los servicios prestados por el sistema de salud pública en el área de consulta externa del hospital Miguel H. Alcívar del cantón Sucre-Ecuador, se planteó aplicar un software como servicio en la nube, para automatizar el agendamiento de referencias y citas previas en línea. Para asegurar con disponibilidad del servicio, se contó con dos diferentes proveedores de internet y se configuró un servidor de redundancia, balanceo de carga y failover, usando la distribución libre de PfSense, lo cual garantiza que el servicio de internet esté disponible si uno de los proveedores falla. La implementación del software mejoró la capacidad resolutiva del nosocomio, facilitó la tarea de los agendadores en la administración de los turnos del médico y redujo los tiempos de reservación de citas en tres minutos; lo cual permitió reducir los costos de gestión y mejorar los niveles de satisfacción del paciente.

  18. Procedimiento para la mejora del proceso de desarrollo de software en la UEB “Aplicaciones de Redes”.

    Directory of Open Access Journals (Sweden)

    Marely Collazo Palmero

    2013-07-01

    Full Text Available Esta investigación tiene como propósito desarrollar un procedimiento para la mejora del proceso de desarrollo de software en la UEB “Aplicaciones de Redes”, el procedimiento se compone de 6 etapas basadas en el ciclo de Deming que comienza con el diagnóstico de la situación actual del proceso productivo, se detectan los problemas existentes y sus causas para elaborar un plan de acción que da lugar a los aportes más significativos de esta investigación: la elaboración del flujograma del servicio de desarrollo de software y los procedimientos e instrucciones necesarios, logrando la estandarización de las herramientas a usar y los artefactos a cumplir en cada etapa del ciclo de vida del software, permitiendo de una forma rápida y organizada el cumplimiento de los requisitos del cliente. Se emplean técnicas y herramientas como conformación del grupo de expertos, tormenta de ideas, lista de chequeo, diagrama causa efecto, revisión de documentos, diagrama de flujo y gráficos de barra tanto para la obtención de información como para facilitar el análisis de los resultados arrojados. El procedimiento contribuye a elevar el por ciento de satisfacción de los clientes involucrando a todo el personal del área productiva.

  19. Proceedings of the Fifth Triennial Software Quality Forum 2000, Software for the Next Millennium, Software Quality Forum

    Energy Technology Data Exchange (ETDEWEB)

    Scientific Software Engineering Group, CIC-12

    2000-04-01

    The Software Quality Forum is a triennial conference held by the Software Quality Assurance Subcommittee for the Department of Energy's Quality Managers. The forum centers on key issues, information, and technology important in software development for the Nuclear Weapons Complex. This year it will be opened up to include local information technology companies and software vendors presenting their solutions, ideas, and lessons learned. The Software Quality Forum 2000 will take on a more hands-on, instructional tone than those previously held. There will be an emphasis on providing information, tools, and resources to assist developers in their goal of producing next generation software.

  20. NASA software documentation standard software engineering program

    Science.gov (United States)

    1991-01-01

    The NASA Software Documentation Standard (hereinafter referred to as Standard) can be applied to the documentation of all NASA software. This Standard is limited to documentation format and content requirements. It does not mandate specific management, engineering, or assurance standards or techniques. This Standard defines the format and content of documentation for software acquisition, development, and sustaining engineering. Format requirements address where information shall be recorded and content requirements address what information shall be recorded. This Standard provides a framework to allow consistency of documentation across NASA and visibility into the completeness of project documentation. This basic framework consists of four major sections (or volumes). The Management Plan contains all planning and business aspects of a software project, including engineering and assurance planning. The Product Specification contains all technical engineering information, including software requirements and design. The Assurance and Test Procedures contains all technical assurance information, including Test, Quality Assurance (QA), and Verification and Validation (V&V). The Management, Engineering, and Assurance Reports is the library and/or listing of all project reports.

  1. Science and Software

    Science.gov (United States)

    Zelt, C. A.

    2017-12-01

    Earth science attempts to understand how the earth works. This research often depends on software for modeling, processing, inverting or imaging. Freely sharing open-source software is essential to prevent reinventing the wheel and allows software to be improved and applied in ways the original author may never have envisioned. For young scientists, releasing software can increase their name ID when applying for jobs and funding, and create opportunities for collaborations when scientists who collect data want the software's creator to be involved in their project. However, we frequently hear scientists say software is a tool, it's not science. Creating software that implements a new or better way of earth modeling or geophysical processing, inverting or imaging should be viewed as earth science. Creating software for things like data visualization, format conversion, storage, or transmission, or programming to enhance computational performance, may be viewed as computer science. The former, ideally with an application to real data, can be published in earth science journals, the latter possibly in computer science journals. Citations in either case should accurately reflect the impact of the software on the community. Funding agencies need to support more software development and open-source releasing, and the community should give more high-profile awards for developing impactful open-source software. Funding support and community recognition for software development can have far reaching benefits when the software is used in foreseen and unforeseen ways, potentially for years after the original investment in the software development. For funding, an open-source release that is well documented should be required, with example input and output files. Appropriate funding will provide the incentive and time to release user-friendly software, and minimize the need for others to duplicate the effort. All funded software should be available through a single web site

  2. Influencia de los Roles de Equipo en las Actividades del Desarrollador de Software

    Directory of Open Access Journals (Sweden)

    Elsa Estrada Guzmán

    2013-05-01

    Full Text Available Uno de los roles básicos en el proceso del software es precisamente el de desarrollador, también denominado ingeniero de software, cuyas actividades principales son: el análisis, diseño, programación y pruebas del producto a desarrollar. Estas actividades, dependiendo generalmente del tamaño del proyecto y de la metodología, pueden estar a cargo de diferentes personas o bien de un grupo de desarrolladores que en conjunto las llevan todas a cabo; en este último caso, estaríamos hablando de trabajo en equipo entre iguales o pares. Por otro lado, de acuerdo con la teoría de roles de equipo, las personas tienden a comportarse de manera regular en forma distintiva cuando colaboran, estas formas particulares de colaborar es probable que influyan en el desempeño del equipo de desarrolladores de software. En este documento se presenta un caso de estudio con la finalidad de entender la influencia de los roles de equipo en ciertas actividades involucradas en el proceso de desarrollo de software.

  3. Gestión del conocimiento en un programa de mejora de procesos de software en MiPyMEs: KMSPI Model

    Directory of Open Access Journals (Sweden)

    Joanna Capote

    2009-01-01

    Full Text Available Durante la realización de los programas de Mejora de Procesos de Software (SPI, se genera una gran cantidad de conocimiento que es necesario gestionar, activos de conocimiento tales como Lecciones Aprendidas, Mejores Prácticas, Experiencias, Problemas y Soluciones que contribuyen tanto al aprendizaje individual como del programa mismo. Este artículo presenta el modelo planteado para gestionar activos de conocimiento generados durante la ejecución de los programas de SPI, a la vez que se establece como una iniciativa para crear una cultura orientada hacia la Gestión del Conocimiento. El modelo de Gestión del Conocimiento para los Programas de Mejora de Procesos de Software llamado, Modelo KMSPI, ha sido validado en dos MIPYMES DS, en las que se crearon Comunidades de Práctica (CoP con el fin de llevar a cabo dentro de ellas cada uno de los procesos planteados por el modelo.

  4. Análisis de modelos de calidad internacionales con respecto a su aplicación a la industria cubana del software

    OpenAIRE

    Neida Aragón Gonzalez; Ana María García Pérez

    2011-01-01

    Se aborda la ausencia de aplicación de modelos de calidad para la producción de software en Cuba, haciendo un análisis crítico de la posible aplicación de modelos internacionales a las condiciones de nuestro país. Se proponen los objetivos a lograr en un sistema de calidad cubano.

  5. Pragmatic Software Innovation

    DEFF Research Database (Denmark)

    Aaen, Ivan; Jensen, Rikke Hagensby

    2014-01-01

    We understand software innovation as concerned with introducing innovation into the development of software intensive systems, i.e. systems in which software development and/or integration are dominant considerations. Innovation is key in almost any strategy for competitiveness in existing markets......, for creating new markets, or for curbing rising public expenses, and software intensive systems are core elements in most such strategies. Software innovation therefore is vital for about every sector of the economy. Changes in software technologies over the last decades have opened up for experimentation......, learning, and flexibility in ongoing software projects, but how can this change be used to facilitate software innovation? How can a team systematically identify and pursue opportunities to create added value in ongoing projects? In this paper, we describe Deweyan pragmatism as the philosophical foundation...

  6. Band structure calculation of GaSe-based nanostructures using empirical pseudopotential method

    International Nuclear Information System (INIS)

    Osadchy, A V; Obraztsova, E D; Volotovskiy, S G; Golovashkin, D L; Savin, V V

    2016-01-01

    In this paper we present the results of band structure computer simulation of GaSe- based nanostructures using the empirical pseudopotential method. Calculations were performed using a specially developed software that allows performing simulations using cluster computing. Application of this method significantly reduces the demands on computing resources compared to traditional approaches based on ab-initio techniques and provides receiving the adequate comparable results. The use of cluster computing allows to obtain information for structures that require an explicit account of a significant number of atoms, such as quantum dots and quantum pillars. (paper)

  7. Expression and crystallization of SeDsbA, SeDsbL and SeSrgA from Salmonella enterica serovar Typhimurium

    International Nuclear Information System (INIS)

    Jarrott, R.; Shouldice, S. R.; Gunčar, G.; Totsika, M.; Schembri, M. A.; Heras, B.

    2010-01-01

    The cloning, purification, crystallization and preliminary crystallographic studies of three DsbA-like proteins present in S. enterica serovar Typhimurium, SeDsbA, SeDsbL and SeSrgA, are reported. Pathogens require protein-folding enzymes to produce functional virulence determinants. These foldases include the Dsb family of proteins, which catalyze oxidative folding in bacteria. Bacterial disulfide catalytic processes have been well characterized in Escherichia coli K-12 and these mechanisms have been extrapolated to other organisms. However, recent research indicates that the K-12 complement of Dsb proteins is not common to all bacteria. Importantly, many pathogenic bacteria have an extended arsenal of Dsb catalysts that is linked to their virulence. To help to elucidate the process of oxidative folding in pathogens containing a wide repertoire of Dsb proteins, Salmonella enterica serovar Typhimurium has been focused on. This Gram-negative bacterium contains three DsbA proteins: SeDsbA, SeDsbL and SeSrgA. Here, the expression, purification, crystallization and preliminary diffraction analysis of these three proteins are reported. SeDsbA, SeDsbL and SeSrgA crystals diffracted to resolution limits of 1.55, 1.57 and 2.6 Å and belonged to space groups P2 1 , P2 1 2 1 2 and C2, respectively

  8. Software para la Planificación de la Operación del Sistema Eléctrico Nacional.

    Directory of Open Access Journals (Sweden)

    Miriam López Pérez

    2011-03-01

    Full Text Available La operación de la planificación del Sistema Eléctrico Nacional es una tarea compleja que exige de herramientas computacionales para ello. Con este propósito los autores han desarrollado un software cuyas características se resumen en este trabajo.  The National Electric Power System plan operation is a very complex task that needs computational tools. Theauthors have developed software for that porpoise which characteristics are resume in this work.

  9. Software testability and its application to avionic software

    Science.gov (United States)

    Voas, Jeffrey M.; Miller, Keith W.; Payne, Jeffery E.

    1993-01-01

    Randomly generated black-box testing is an established yet controversial method of estimating software reliability. Unfortunately, as software applications have required higher reliabilities, practical difficulties with black-box testing have become increasingly problematic. These practical problems are particularly acute in life-critical avionics software, where requirements of 10 exp -7 failures per hour of system reliability can translate into a probability of failure (POF) of perhaps 10 exp -9 or less for each individual execution of the software. This paper describes the application of one type of testability analysis called 'sensitivity analysis' to B-737 avionics software; one application of sensitivity analysis is to quantify whether software testing is capable of detecting faults in a particular program and thus whether we can be confident that a tested program is not hiding faults. We so 80 by finding the testabilities of the individual statements of the program, and then use those statement testabilities to find the testabilities of the functions and modules. For the B-737 system we analyzed, we were able to isolate those functions that are more prone to hide errors during system/reliability testing.

  10. Lessons from Coronagraphic Imaging with HST that may apply to JWST

    Science.gov (United States)

    Grady, C. A.; Hines, Dean C.; Schneider, Glenn; McElwain, Michael W.

    2017-06-01

    One of the major capabilities offered by JWST is coronagraphic imaging from space, covering the near through mid-IR and optimized for study of planet formation and the evolution of planetary systems. Planning for JWST has resulted in expectations for instrument performance, observation strategies and data reduction approaches. HST with 20 years of coronagraphic imaging offers some experience which may be useful to those planning for JWST. 1) Real astronomical sources do not necessarily conform to expectations. Debris disks may be accompanied by more distant material, and some systems may be conspicuous in scattered light when offering only modest IR excesses. Proto-planetary disks are not constantly illuminated, and thus a single epoch observation of the source may not be sufficient to reveal everything about it. 2) The early expectation with NICMOS was that shallow, 2-roll observations would reveal a wealth of debris disks imaged in scattered light, and that only a limited set of PSF observations would be required. Instead, building up a library of spatially resolved disks in scattered light has proven to require alternate observing strategies, is still on-going, and has taken far longer than expected. 3) A wealth of coronagraphic options with an instrument may not be scientifically informative, unless there is a similar time investment in acquisition of calibration data in support of the science observations. 4) Finally, no one anticipated what can be gleaned from coronagraphic imaging. We should expect similar, unexpected, and ultimately revolutionary discoveries with JWST.

  11. The software life cycle

    CERN Document Server

    Ince, Darrel

    1990-01-01

    The Software Life Cycle deals with the software lifecycle, that is, what exactly happens when software is developed. Topics covered include aspects of software engineering, structured techniques of software development, and software project management. The use of mathematics to design and develop computer systems is also discussed. This book is comprised of 20 chapters divided into four sections and begins with an overview of software engineering and software development, paying particular attention to the birth of software engineering and the introduction of formal methods of software develop

  12. Desarrollo de la competencia profesional con el trabajo colaborativo en proyectos innovadores de software libre

    OpenAIRE

    Arrés López, Eugenia

    2012-01-01

    El planteamiento, desarrollo y evaluación de una actividad profesional real permite un desarrollo más sencillo, rápido y motivador de las competencias profesionales. Este planteamiento se constató durante el desarrollo de proyectos de software libre de los alumnos de la Escuela Técnica Superior de Ingeniería informática y de Telecomunicaciones de la Universidad de Granada, en los que se integró informalmente un equipo con estudiantes de la Facultad de Traducción e Interpretación para mejorar ...

  13. Software Engineering Laboratory Series: Collected Software Engineering Papers. Volume 14

    Science.gov (United States)

    1996-01-01

    The Software Engineering Laboratory (SEL) is an organization sponsored by NASA/GSFC and created to investigate the effectiveness of software engineering technologies when applied to the development of application software. The activities, findings, and recommendations of the SEL are recorded in the Software Engineering Laboratory Series, a continuing series of reports that includes this document.

  14. Software Engineering Laboratory Series: Collected Software Engineering Papers. Volume 15

    Science.gov (United States)

    1997-01-01

    The Software Engineering Laboratory (SEL) is an organization sponsored by NASA/GSFC and created to investigate the effectiveness of software engineering technologies when applied to the development of application software. The activities, findings, and recommendations of the SEL are recorded in the Software Engineering Laboratory Series, a continuing series of reports that includes this document.

  15. Software Engineering Laboratory Series: Collected Software Engineering Papers. Volume 13

    Science.gov (United States)

    1995-01-01

    The Software Engineering Laboratory (SEL) is an organization sponsored by NASA/GSFC and created to investigate the effectiveness of software engineering technologies when applied to the development of application software. The activities, findings, and recommendations of the SEL are recorded in the Software Engineering Laboratory Series, a continuing series of reports that includes this document.

  16. Bright galaxies at z=9-11 from pure-parallel HST observations: Building a unique sample for JWST with Spitzer/IRAC

    Science.gov (United States)

    Bouwens, Rychard; Morashita, Takahiro; Stefanon, Mauro; Magee, Dan

    2018-05-01

    The combination of observations taken by Hubble and Spitzer revealed the unexpected presence of sources as bright as our own Milky Way as early as 400 Myr after the Big Bang, potentially highlighting a new highly efficient regime for star formation in L>L* galaxies at very early times. Yet, the sample of high-quality z>8 galaxies with both HST and Spitzer/IRAC imaging is still small, particularly at the highest luminosities. We propose here to remedy this situation and use Spitzer/IRAC to efficiently follow up the most promising z>8 sources from our Hubble Brightest of Reionizing Galaxies (BoRG) survey, which covers a footprint on the sky similar to CANDELS, provides a deeper search than ground-based surveys like UltraVISTA, and is robust against cosmic variance because of its 210 independent lines of sight. The proposed new 3.6 micron observations will continue our Spitzer cycle 12 and 13 BORG911 programs, targeting 15 additional fields, leveraging over 200 new HST orbits to identify a final sample of about 8 bright galaxies at z >= 8.5. For optimal time use (just 20 hours), our goal is to readily discriminate between z>8 sources (undetected or marginally detected in IRAC) and z 2 interlopers (strongly detected in IRAC) with just 1-2 hours per pointing. The high-quality candidates that we will identify with IRAC will be ideal targets for further studies investigating the ionization state of the distant universe through near-IR Keck/VLT spectroscopy. They will also be uniquely suited to measurement of the redshift and stellar population properties through JWST/NIRSPEC observations, with the potential to elucidate how the first generations of stars are assembled in the earliest stages of the epoch of reionization.

  17. Paradigma Experimental en la Ingeniería de Software: Caso Programación en Pareja

    Directory of Open Access Journals (Sweden)

    Omar S. Gómez

    2013-08-01

    Full Text Available Contexto: La Ingeniería de Software (IS es una disciplina compleja donde a día de hoy el resultado de la aplicación de alguna tecnología para apoyar el desarrollo de software es impredecible. De manera similar a otras disciplinas ingenieriles, la IS requiere de construcción de modelos, experi-mentación y aprendizaje. La experimentación es un recurso va-lioso que permite evaluar de manera objetiva las distintas tecnologías disponibles para desarrollar software. Objetivo: Con la finalidad de promover el paradigma experimental en la IS, en este artículo se aplica el paradigma experimental para estudiar algunos efectos de la programación en pareja. Método: A través de un diseño experimental cuadrado latino con dos factores de bloqueo, se emplearon 21 estudiantes del programa de licen-ciatura en IS de la Universidad Autónoma de Yucatán (UADY para examinar la duración y esfuerzo que conlleva la progra-mación en pareja. Los estudiantes se agruparon en 7 parejas y 7 individuos donde codificaron durante dos sesiones dos programas pequeños. Resultados: Los resultados del experimento sugieren una diferencia significativa (en un nivel α=0.1 en favor de la programación en pareja con respecto a la duración de codi-ficación de los ejercicios asignados (28% decremento en tiempo. Por el contrario, los resultados sugieren una diferencia signifi-cativa (en un nivel α=0.1 en favor de la programación individual con respecto al esfuerzo (30% decremento en esfuerzo. Conclu-siones: En este artículo se presenta el paradigma experimental aplicado a la IS. A través del paradigma experimental es posible obtener observaciones de manera objetiva para acumular un cuerpo de conocimientos que pueda ser usado de manera confía-ble por profesionales en IS.

  18. Cost Effective Development of Usable Systems: Gaps between HCI and Software Architecture Design

    Science.gov (United States)

    Folmer, Eelke; Bosch, Jan

    A software product with poor usability is likely to fail in a highly competitive market; therefore software developing organizations are paying more and more attention to ensuring the usability of their software. Practice, however, shows that product quality (which includes usability among others) is not that high as it could be. Studies of software projects (Pressman, 2001) reveal that organizations spend a relative large amount of money and effort on fixing usability problems during late stage development. Some of these problems could have been detected and fixed much earlier. This avoidable rework leads to high costs and because during development different tradeoffs have to be made, for example between cost and quality leads to systems with less than optimal usability. This problem has been around for a couple of decades especially after software engineering (SE) and human computer interaction (HCI) became disciplines on their own. While both disciplines developed themselves, several gaps appeared which are now receiving increased attention in research literature. Major gaps of understanding, both between suggested practice and how software is actually developed in industry, but also between the best practices of each of the fields have been identified (Carrol et al, 1994, Bass et al, 2001, Folmer and Bosch, 2002). In addition, there are gaps in the fields of differing terminology, concepts, education, and methods.

  19. Alinhando objetivos estratégicos e processo de desenvolvimento em empresas de software

    Directory of Open Access Journals (Sweden)

    André Leme Fleury

    2014-06-01

    Full Text Available Sistemas de software são atualmente responsáveis por parte significativa das inovações tecnológicas viabilizadas em produtos e serviços. A história do software é recente, assim como são recentes as pesquisas sobre o tema, que tem como foco principal o aprimoramento dos seus processos de desenvolvimento. Apesar das contribuições trazidas por essas teorias, a questão do alinhamento entre objetivos estratégicos e o processo de desenvolvimento nas empresas de software considerando as suas principais capacidades produtivas permanece um tema inexplorado. Como consequência, técnicas da engenharia de software são aplicadas sem incorporar considerações de valor nos processos de análise e na tomada de decisões. Este artigo analisa e apresenta soluções para duas questões: como diferenciar as empresas de software de acordo com seus processos produtivos mais relevantes e como garantir que esses processos de desenvolvimento encontram-se alinhados com os objetivos do negócio. A abordagem resultante inclui um referencial para classificação de empresas de software e uma técnica de planejamento tecnológico para essas empresas. O projeto de pesquisa incluiu a realização de surveys, pesquisa-ação e estudos de caso.

  20. Estudio sobre el software libre orientado a personas con discapacidad visual

    OpenAIRE

    Palomá Parra, Esaú

    2015-01-01

    Se pretende realizar un estudio sobre las herramientas TIC accesibles a las personas con discapacidad visual, que permita sugerir el diseño de un sistema universal accesible orientado a personas con discapacidad visual. Es pretén realitzar un estudi sobre les eines TIC accessibles a les persones amb discapacitat visual, que permeti suggerir el disseny d'un sistema universal accessible orientat a persones amb discapacitat visual. Master thesis for the Free Software program.

  1. ANÁLISIS DE LA INGENIERÍA DE REQUISITOS ORIENTADA POR ASPECTOS SEGÚN LA INDUSTRIA DEL SOFTWARE

    Directory of Open Access Journals (Sweden)

    Luis Fernando Londoño

    2008-07-01

    Full Text Available La aplicación de buenas prácticas en la gestión de requisitos de software es una condición fundamental para lograr productos de calidad. Por lo tanto, es importante que las compañías de desarrollo de software mantengan una investigación constante alrededor de nuevas técnicas que mejoren actividades de requisitos tales como levantamiento, especificación y modelado. En este artículo se presenta un estudio de los enfoques más representativos de la ingeniería de requisitos orientada por aspectos que podrían ayudar a resolver problemas que enfrentan las compañías de software durante las etapas tempranas de desarrollo. Se hace un análisis comparativo entre los enfoques, a partir de los criterios de alcance, trazabilidad, composición de requisitos, manejo de conflictos, mapeo, validación-verificación y escalabilidad. Los resultados obtenidos permiten detectar las oportunidades que el enfoque de aspectos ofrece para mejorar el proceso de los requisitos.Applying good practices to manage software requirements is a basic condition to obtain quality products. Therefore, it is important that software companies maintain a constant research around of new techniques and mechanisms to improve requirements activities such as elicitation, specification, and modeling. In this paper, we present a study of most representative aspect-oriented requirement approaches in order to analyze the way how these could support issues confronted by software companies during early stages of the lifecycle. Thus, we make a comparative analysis among approaches under criteria defined such as scope, traceability, requirements composition, conflict management, mapping, validation-verification, and scalability. Results achieved allowing us to know opportunities offered by aspect-oriented approaches so as to improve the requirement process.

  2. Proposta de arquitetura de hardware e software para sistemas tempo-real distribuídos

    OpenAIRE

    Marcelo Gotz

    2001-01-01

    Um sistema tempo-real caracteriza-se por possuir requisitos temporais para execução de suas atividades, e de acordo com a sua tolerância ao atendimento destes requisitos é classificado em hard-real-time ou soft-real-time. O presente trabalho se propõe a apresentar uma arquitetura de hardware e software para suporte a sistemas tempo-real embarcados de baixo custo com objetivo de aplicação em pesquisas no meio acadêmico e que possa ser usado até em ambientes hard-real-time. A motivação para est...

  3. Modelo de bloques para un yacimiento de sulfuros masivos utilizando el software minesight®

    OpenAIRE

    Franco Sepúlveda, Giovanni; Gallo Sierra, Adrián Felipe

    2012-01-01

    El objetivo de este trabajo es definir un modelo de bloques de un yacimiento hipotético de sulfuros masivos utilizandoMineSight®, basado en la interpretación geológica, la viabilidad, planificación estratégica y la programación de los procesosa largo y corto plazo de las alternativas de producción y la capacidad requerida de la mina.Primero se presentan una descripción de los software minero más representativos del mercado en cuanto a la planeación minera, después se presentan las generalidad...

  4. Software educativo e a importância de uma «métrica»

    OpenAIRE

    Gil, Henrique; Menezes, Helena

    2004-01-01

    Esta comunicação pretende caracterizar de forma sumária a importância da tecnologia educativa, em geral, e as diferenças tipologias de software educativo com vista à sua integração e utilização no processo de ensino e de aprendizagem. Um outro objectivo tem a ver com a necessidade de se efectuar uma discussão acerca do real potencial educativo destes materiais. Por isso, pretende-se apresentar uma reflexão crítica acerca de uma métrica que permita, aos educadores e professores, uma indicação ...

  5. ESTUDO DE PARÂMETROS MORFOMÉTRICOS DA SUB-BACIA HIDROGRÁFICA DO RIO JACARECICA (SE

    Directory of Open Access Journals (Sweden)

    Alex de Sousa Lima

    2016-03-01

    Full Text Available Dentre as diversas formas de se estudar as bacias hidrográficas uma delas é através dos parâmetros morfométricos, pois dão o suporte ao entendimento de processos dinâmicos atuantes no relevo. Este trabalho visou estudar a morfometria da sub-bacia do rio Jacarecica, Sergipe, Brasil. A base de dados utilizada foi a do Atlas Digital sobre Recursos Hídricos de Sergipe (SEPLAN/SRH, 2004, corrigida. As características morfométricas de área foram obtidas através do software Spring 4.3, enquanto que as outras se deram por meio de equações. A área da drenagem encontrada foi de 503,76 km², extensão de 59 km e orientação NW-SE. A partir dos dados constatou-se que a sub-bacia apresenta-se alongada, apesar de o Índice de Circularidade (Ic apontar para um arredondamento. É sinuoso com drenagem baixa e sua densidade hidrográfica é diretamente afetada pelas Serras Residuais (quartzito. Observou-se que na área a montante das serras há uma deficiência de umidade o que influi na ocupação e utilização do espaço agrário local. Fato que faz com que haja na sub-bacia dois comportamentos diferenciados quanto à distribuição de umidade, controlado pelo fator orográfico. Palavras-chave: Morfometria; Bacia Hidrográfica; Geologia; Geomorfologia.   STUDY OF MORPHOMETRIC PARAMETERS OF THE SUB-BASIN OF THE RIVER JACARECICA (SE   ABSTRACT Among the various forms of studying watersheds of them is through the morphometric parameters because they give support to the understanding of active dynamic processes in relief. This work aimed to study the morphology of the sub-basin of the river Jacarecica, Sergipe, Brazil. The database used was the Digital Atlas of Sergipe on Water Resources (SEPLAN / SRH, 2004, corrected. The morphological characteristics of the area were obtained Spring 4.3 software, while the other is given by equations. The drainage area found was 503.76 square kilometers, extending 59 km and NW-SE orientation. From the data it

  6. Using software metrics and software reliability models to attain acceptable quality software for flight and ground support software for avionic systems

    Science.gov (United States)

    Lawrence, Stella

    1992-01-01

    This paper is concerned with methods of measuring and developing quality software. Reliable flight and ground support software is a highly important factor in the successful operation of the space shuttle program. Reliability is probably the most important of the characteristics inherent in the concept of 'software quality'. It is the probability of failure free operation of a computer program for a specified time and environment.

  7. Diseño y programación de un software de transformación de matrices para el análisis de redes

    Directory of Open Access Journals (Sweden)

    Enrique Marcet García

    2016-06-01

    Full Text Available Para muchos profesionales vinculados al Análisis de Redes Sociales (ARS, es de importancia transformar sus datos para realizar estudios posteriores. Es frecuente que los datos de sistemas donde intervienen conexiones se almacenen en matrices más elementales que las matrices completas o “full matrix”, frecuentemente utilizadas en programas de ARS. El objetivo principal de este trabajo fue diseñar y programar un software modificable para transformar matrices de tres columnas [A (grupo 1, B (grupo 2 y C (conexiones entre nodos de ambos grupos] a matrices completas y simétricas, y analizar las ventajas del software con respecto a los problemas de almacenamiento y transformación de datos. Para ello se desarrolló un método de transformación de matrices y se diseñó un algoritmo (pseudocódigo para realizar las operaciones necesarias. El algoritmo fue programado usando el lenguaje wxBasic para aumentar la compatibilidad entre sistemas operativos y facilitar su modificación por el usuario, obteniéndose un software estable y de fácil uso

  8. Software Radar Technology

    Directory of Open Access Journals (Sweden)

    Tang Jun

    2015-08-01

    Full Text Available In this paper, the definition and the key features of Software Radar, which is a new concept, are proposed and discussed. We consider the development of modern radar system technology to be divided into three stages: Digital Radar, Software radar and Intelligent Radar, and the second stage is just commencing now. A Software Radar system should be a combination of various modern digital modular components conformed to certain software and hardware standards. Moreover, a software radar system with an open system architecture supporting to decouple application software and low level hardware would be easy to adopt "user requirements-oriented" developing methodology instead of traditional "specific function-oriented" developing methodology. Compared with traditional Digital Radar, Software Radar system can be easily reconfigured and scaled up or down to adapt to the changes of requirements and technologies. A demonstration Software Radar signal processing system, RadarLab 2.0, which has been developed by Tsinghua University, is introduced in this paper and the suggestions for the future development of Software Radar in China are also given in the conclusion.

  9. Application of Metric-based Software Reliability Analysis to Example Software

    International Nuclear Information System (INIS)

    Kim, Man Cheol; Smidts, Carol

    2008-07-01

    The software reliability of TELLERFAST ATM software is analyzed by using two metric-based software reliability analysis methods, a state transition diagram-based method and a test coverage-based method. The procedures for the software reliability analysis by using the two methods and the analysis results are provided in this report. It is found that the two methods have a relation of complementary cooperation, and therefore further researches on combining the two methods to reflect the benefit of the complementary cooperative effect to the software reliability analysis are recommended

  10. Armonización de modelos de calidad del software

    OpenAIRE

    Gabriel Alberto Garcia Mireles; Felix Oscar Garcia Rubio

    2013-01-01

    La tendencia actual entre las organizaciones que desarrollan software es la adopción de más de un modelo de calidad para estar en condiciones de competir en diversos sectores del mercado. En esa situación, las organizaciones se enfrentan al problema de coordinar la implantación de múltiples modelos de tal manera que cada modelo logre los beneficios esperados, y al mismo tiempo, que los costos y esfuerzo de implantación sean mínimos. Como respuesta a este problema, surge la armonización de mod...

  11. Evaluación del desempeño de los recursos humanos. Una visión crítica desde las organizaciones cubanas de producción de software.

    Directory of Open Access Journals (Sweden)

    Lídice Alvarez Pérez

    2006-03-01

    Full Text Available La Gestión de los Recursos Humanos continúa siendo el elemento central de una empresa. Las organizaciones de software en la actualidad no quedan excluidas de lo anterior. Es por esto que en este trabajo se describen los resultados de una revisión sobre la evaluación del desempeño de los recursos humanos en el ámbito de las organizaciones de software en Cuba y el mundo. Para esto se parte de los principios básicos de la gestión de recursos humanos, gestión de la calidad, utilización de los modelos de calidad, el contexto nacional e internacional, entre otros aspectos, elementos esenciales para conocer el estado actual de la Gestión de los Recursos Humanos y la Evaluación del Desempeño en organizaciones de Software. Se exponen las principales deficiencias que existen en este sentido y que es necesario erradicar.

  12. CuInSe2 nano-crystallite reaction kinetics using solid state reaction from Cu2Se and In2Se3 powders

    International Nuclear Information System (INIS)

    Hsiang, Hsing-I; Lu, Li-Hsin; Chang, Yu-Lun; Ray, Dahtong; Yen, Fu-Su

    2011-01-01

    Highlights: → CuInSe 2 phase increased gradually accompanied with a decrease in γ-In 2 Se 3 and no intermediate phase during calcination. → CuInSe 2 formation from Cu 2 Se and In 2 Se 3 powders follows a one-dimensional diffusion-controlled reaction with apparent activation energy of about 122.5 kJ/mol. → The solid reaction kinetics may be dominated by the diffusion of In 3+ ions. - Abstract: The reaction mechanism and CuInSe 2 formation kinetics using a solid state reaction from Cu 2 Se and In 2 Se 3 powders synthesized using a heating up process were investigated using X-ray diffractomy (XRD) and transmission electron microscopy (TEM). It was observed that the CuInSe 2 phase increased gradually, accompanied with a decrease in γ-In 2 Se 3 with no intermediate phase as the calcination temperature and soaking time were increased. The reaction kinetics was analyzed using the Avrami and polynomial kinetic model, suggesting that CuInSe 2 formation from Cu 2 Se and In 2 Se 3 powders follows a diffusion-controlled reaction with an apparent activation energy of about 122.5-182.3 kJ/mol. Cu 2 Se and In 2 Se 3 phases react and directly transform into CIS without the occurrence of any intermediate phase and the size of the newly formed CuInSe 2 crystallites was close to that of the Cu 2 Se reactant particle based on the TEM results, which indicated that the solid reaction kinetics may be dominated by the diffusion of In 3+ ions.

  13. O software de gestão hoteleira em resorts: o caso do Complexo Bávaro do Grupo Iberostar

    OpenAIRE

    Ferreiro, Sofia Borges

    2010-01-01

    No capítulo I aborda-se a estratégia hoteleira adoptada por hotéis para que se compreenda a perspectiva e visão de uma adequada e estratégica gestão hoteleira. Para isso, é necessário distinguir dois diferentes tipos de hotéis existentes no mercado hoteleiro, nomeadamente os hotéis de cidade e hotéis de resort. A partir das respectivas caracterizações e enquadramentos em ambientes distintos, percebe-se agora as necessidades específicas de cada um para uma aplicação de software apropriada e ad...

  14. Possibilities and limitations of applying software reliability growth models to safety-critical software

    International Nuclear Information System (INIS)

    Kim, Man Cheol; Jang, Seung Cheol; Ha, Jae Joo

    2007-01-01

    It is generally known that software reliability growth models such as the Jelinski-Moranda model and the Goel-Okumoto's Non-Homogeneous Poisson Process (NHPP) model cannot be applied to safety-critical software due to a lack of software failure data. In this paper, by applying two of the most widely known software reliability growth models to sample software failure data, we demonstrate the possibility of using the software reliability growth models to prove the high reliability of safety-critical software. The high sensitivity of a piece of software's reliability to software failure data, as well as a lack of sufficient software failure data, is also identified as a possible limitation when applying the software reliability growth models to safety-critical software

  15. Interface-based software testing

    Directory of Open Access Journals (Sweden)

    Aziz Ahmad Rais

    2016-10-01

    Full Text Available Software quality is determined by assessing the characteristics that specify how it should work, which are verified through testing. If it were possible to touch, see, or measure software, it would be easier to analyze and prove its quality. Unfortunately, software is an intangible asset, which makes testing complex. This is especially true when software quality is not a question of particular functions that can be tested through a graphical user interface. The primary objective of software architecture is to design quality of software through modeling and visualization. There are many methods and standards that define how to control and manage quality. However, many IT software development projects still fail due to the difficulties involved in measuring, controlling, and managing software quality. Software quality failure factors are numerous. Examples include beginning to test software too late in the development process, or failing properly to understand, or design, the software architecture and the software component structure. The goal of this article is to provide an interface-based software testing technique that better measures software quality, automates software quality testing, encourages early testing, and increases the software’s overall testability

  16. Controllable size reduction of CdSe nanowires through the intermediate formation of Se-coated CdSe nanowires using acid and thermal treatment

    Energy Technology Data Exchange (ETDEWEB)

    Lam, N S [Department of Physics, Chinese University of Hong Kong, Hong Kong (China); Wong, K W [Department of Physics, Chinese University of Hong Kong, Hong Kong (China); Li, Q [Department of Physics, Chinese University of Hong Kong, Hong Kong (China); Zheng, Z [Department of Physics, Chinese University of Hong Kong, Hong Kong (China); Lau, W M [Surface Science Western, University of Western Ontario, London, ON, N6A 5B7 (Canada)

    2007-10-17

    Thinning of CdSe nanowires (NWs) with controllable size was achieved by a simple acid treatment and subsequent annealing on thick CdSe NWs synthesized from vapour phase growth. During acid treatment, not only the undesired impurities such as native oxides of Cd and Se could be etched, but surface reactions of CdSe NWs were also observed, resulting in the formation of a layer of elemental Se around a thinner CdSe core. As a result, a heterostructure of Se - CdSe nanostructure formed after acid treatment of CdSe NWs. Upon thermal annealing, the Se shell was effectively removed and thinned stoichiometric single-crystalline CdSe NWs could be obtained. It was observed that NWs could be thinned by up to {approx}60% in diameter by acid treatment and subsequent Se thermal desorption. The degree of thinning was controllable by adjusting the duration of acid treatment. The success of the thinning of CdSe NWs by simple acid treatment and the annealing process reported here opens a new processing route for obtaining stoichiometric CdSe NWs with controllable size reduction and improved aspect ratio. This can undoubtedly broadly improve the range of applications of 1D CdSe nanostructures and allow more exploration of their uni-directional properties. A correction was made to the last paragraph of section 3 on 18 September 2007. The corrected electronic version is identical to the print version.

  17. Controllable size reduction of CdSe nanowires through the intermediate formation of Se-coated CdSe nanowires using acid and thermal treatment

    International Nuclear Information System (INIS)

    Lam, N S; Wong, K W; Li, Q; Zheng, Z; Lau, W M

    2007-01-01

    Thinning of CdSe nanowires (NWs) with controllable size was achieved by a simple acid treatment and subsequent annealing on thick CdSe NWs synthesized from vapour phase growth. During acid treatment, not only the undesired impurities such as native oxides of Cd and Se could be etched, but surface reactions of CdSe NWs were also observed, resulting in the formation of a layer of elemental Se around a thinner CdSe core. As a result, a heterostructure of Se - CdSe nanostructure formed after acid treatment of CdSe NWs. Upon thermal annealing, the Se shell was effectively removed and thinned stoichiometric single-crystalline CdSe NWs could be obtained. It was observed that NWs could be thinned by up to ∼60% in diameter by acid treatment and subsequent Se thermal desorption. The degree of thinning was controllable by adjusting the duration of acid treatment. The success of the thinning of CdSe NWs by simple acid treatment and the annealing process reported here opens a new processing route for obtaining stoichiometric CdSe NWs with controllable size reduction and improved aspect ratio. This can undoubtedly broadly improve the range of applications of 1D CdSe nanostructures and allow more exploration of their uni-directional properties. A correction was made to the last paragraph of section 3 on 18 September 2007. The corrected electronic version is identical to the print version

  18. Agile software assessment

    OpenAIRE

    Nierstrasz Oscar; Lungu Mircea

    2012-01-01

    Informed decision making is a critical activity in software development but it is poorly supported by common development environments which focus mainly on low level programming tasks. We posit the need for agile software assessment which aims to support decision making by enabling rapid and effective construction of software models and custom analyses. Agile software assessment entails gathering and exploiting the broader context of software information related to the system at hand as well ...

  19. Desarrollo una metodología para estandarizar las auditorias del software para sistemas de control y protección del ferrocarril

    OpenAIRE

    Gioia, Cintia; Maidana, Carlos; Pomar, Pablo; Ureta, Walter; Eterovic, Silvina; Donadello, Domingo F.; Eterovic, Jorge

    2014-01-01

    El software es un elemento clave en todos los sistemas que se utilizan actualmente en la gestión de las organizaciones, en particular los sistemas de control, incluidos los de seguridad crítica, tales como los de control y protección de las aplicaciones ferroviarias, en los que una falla puede causar daños irreparables a personas y/o al entorno. Ésta dependencia ha hecho que el nivel de fiabilidad requerido para este tipo de software sea muy alto. La forma de conseguir un software de calid...

  20. Prácticas de Desarrollo Software: Un Estudio Exploratorio con Herramientas de Análisis Estático

    Directory of Open Access Journals (Sweden)

    Marisa Cecilia Tumino

    2015-10-01

    Full Text Available La investigación en ingeniería de software ha demostrado que la prevención de defectos desde el comienzo del desarrollo resulta menos costosa que corregirlos más tarde. En este sentido existen numerosos intentos por proveer herramientas con el objeto de sistematizar los procedimientos de análisis estático de código fuente. En este trabajo se analizó el potencial de cinco de estas herramientas seleccionadas por la actualidad de sus versiones, su disponibilidad y su utilización en investigaciones afines. Para el análisis, las herramientas se ejecutaron en el código fuente del software BlueJ, en sus diez últimas versiones, dado su amplio empleo tanto en el mercado de desarrollo de software como en el ámbito de instituciones educativas. Los resultados obtenidos del análisis, y sus conclusiones, acercan posibles soluciones a esta problemática que varía en alto grado conforme a los objetivos trazados por los equipos de desarrollo. El trabajo contribuye a facilitar la selección de herramientas apropiadas para el análisis estático de código fuente en equipos que están comenzando a incluir aspectos de calidad del producto software en las etapas tempranas del desarrollo