Artículos: Envíos recientes

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    • Physicochemical Characterization of Airborne Particulate Matter in Medellín, Colombia, and its Use in an In Silico Study of Ventricular Action Potential 

      Zapata-Hernandez C.; Durango-Giraldo G.; Tobón C.; Buitrago-Sierra R.
      Particulate matter (PM) is a complex mixture of particles that changes over time and from place to place; however, most PM is caused by the fuel combustion of motor vehicles and industry. PM is associated with acute and ...

    • Phosphate removal from aqueous solutions by heat treatment of eggshell and palm fiber 

      Perez S.; Muñoz-Sadaña J.; Acelas N.; Fĺorez E.
      Phosphate removal from wastewater and the correspondent sustainable technologies are urgent issues to solve since phosphorous causes eutrophication of water sources. The effect of heat treatment on the mixture eggshell ...

    • Optimization of aggregate production costs in textile companies [Optimización de costos de producción agregada en empresas del sector textil] 

      Campo E.A.; Cano J.A.; Gómez-Montoya R.A.
      This article aims to optimize the aggregate production costs in textile companies sector through production strategies in the medium term. For this, an aggregate production planning model called PLAG is developed, which ...

    • Order Reduction Rules Based on Statistical Techniques for Inverse Response Processes 

      Castellanos D.; Castrillon F.; Camacho O.; Gutierrez S.; Posada N.L.
      In this work, we present a set of rules that transforms the model of Inverse Response Second Order Plus Dead Time Process (IRSODT) and reduces it to a First Order Plus Dead Time (FOPDT) model. We describe the design process ...

    • On the principle of planning in public contracting: A theoretical and factual analysis in the colombian legal order [Del principio de planeación en la contratación estatal: Un análisis teórico y fáctico en el orden jurídico colombiano] 

      Tamayo J.F.R.; Hincapié G.L.B.
      The present work has two objectives: (i) to illustrate how the constitutional and principlistic paradigm of our legal system reliably conditions the entire scaffolding of public contracting and, (ii) to demonstrate, by ...

    • Numerical modeling parameters by the finite elements method for a hollow concrete block under uniaxial compression load [Parámetros de modelación numérica mediante elementos finitos para un bloque hueco de concreto bajo carga de compresión uniaxial] 

      Ruiz A.I.; Giraldo J.M.G.; Nallim L.G.; Diaz R.L.B.; Oller S.H.
      The growing demand in modern industry requires increasingly greater demands on the structural performance of the employed materials and, therefore, it has been seen that is necessary to implement a series of numerical ...

    • Optical responses in asymmetric hyperbolic-type quantum wells under the effect of external electromagnetic fields 

      Ungan F.; Bahar M.K.; Martinez-Orozco J.C.; Mora-Ramos M.E.
      In the present work, some optical properties related to intersubband transitions in finite depth asymmetric hyperbolic-type quantum wells are theoretically investigated. The use of a hyperbolic potential configuration would ...

    • Nonlinear optical properties of n-type asymmetric double δ -doped quantum wells: role of high-frequency laser radiation, doping concentration and well width 

      Durmuslar A.S.; Mora-Ramos M.E.; Ungan F.
      A numerical investigation on the nonlinear optical rectification, second and third harmonic generation coefficients in asymmetric double n-type δ-doped GaAs quantum well is performed in order to identify the influence of ...

    • Non-Smooth Dynamics in Energy Market Models: A Complex Approximation from System Dynamics and Dynamical Systems Approach 

      Valencia-Calvo J.; Olivar-Tost G.; Morcillo-Bastidas J.D.; Franco-Cardona C.J.; Dyner I.
      This paper reports a general model that describes the supply and demand of electricity in a national market based on the system dynamics (SD) approach. From the resulting SD model, it derives piecewise smooth (non-smooth) ...

    • Modelo de evaluacion gamificado en cursos de algoritmos y programacion 

      Zapata Puerta L.N.; Gomez-Alvarez M.C.
      Currently, engineering and computer science programs worldwide face several challenges, on the one hand, high dropout rates still persist in these programs with rates ranging from 30% to 50%. On the other hand, due to this ...

    • Measurement of the cosmic-ray energy spectrum above 2.5×1018 eV using the Pierre Auger Observatory 

      Aab A.; Abreu P.; Aglietta M.; Albury J.M.; Allekotte I.; Almela A.; Alvarez Castillo J.; Alvarez-Muñiz J.; Alves Batista R.; Anastasi G.A.; Anchordoqui L.; Andrada B.; Andringa S.; Aramo C.; Araújo Ferreira P.R.; Asorey H.; Assis P.; Avila G.; Badescu A.M.; Bakalova A.; Balaceanu A.; Barbato F.; Barreira Luz R.J.; Becker K.H.; Bellido J.A.; Berat C.; Bertaina M.E.; Bertou X.; Biermann P.L.; Bister T.; Biteau J.; Blanco A.; Blazek J.; Bleve C.; Boháčová M.; Boncioli D.; Bonifazi C.; Bonneau Arbeletche L.; Borodai N.; Botti A.M.; Brack J.; Bretz T.; Briechle F.L.; Buchholz P.; Bueno A.; Buitink S.; Buscemi M.; Caballero-Mora K.S.; Caccianiga L.; Calcagni L.; Cancio A.; Canfora F.; Caracas I.; Carceller J.M.; Caruso R.; Castellina A.; Catalani F.; Cataldi G.; Cazon L.; Cerda M.; Chinellato J.A.; Choi K.; Chudoba J.; Chytka L.; Clay R.W.; Cobos Cerutti A.C.; Colalillo R.; Coleman A.; Coluccia M.R.; Conceição R.; Condorelli A.; Consolati G.; Contreras F.; Convenga F.; Covault C.E.; Dasso S.; Daumiller K.; Dawson B.R.; Day J.A.; De Almeida R.M.; De Jesús J.; De Jong S.J.; De Mauro G.; De Mello Neto J.R.T.; De Mitri I.; De Oliveira J.; De Oliveira Franco D.; De Souza V.; De Vito E.; Debatin J.; Del Río M.; Deligny O.; Dembinski H.; Dhital N.; Di Giulio C.; Di Matteo A.; Díaz Castro M.L.; Dobrigkeit C.; D'Olivo J.C.; Dorosti Q.; Dos Anjos R.C.; Dova M.T.; Ebr J.; Engel R.; Epicoco I.; Erdmann M.; Escobar C.O.; Etchegoyen A.; Falcke H.; Farmer J.; Farrar G.; Fauth A.C.; Fazzini N.; Feldbusch F.; Fenu F.; Fick B.; Figueira J.M.; Filipčič A.; Fodran T.; Freire M.M.; Fujii T.; Fuster A.; Galea C.; Galelli C.; García B.; Garcia Vegas A.L.; Gemmeke H.; Gesualdi F.; Gherghel-Lascu A.; Ghia P.L.; Giaccari U.; Giammarchi M.; Giller M.; Glombitza J.; Gobbi F.; Gollan F.; Golup G.; Gómez Berisso M.; Gómez Vitale P.F.; Gongora J.P.; González N.; Goos I.; Góra D.; Gorgi A.; Gottowik M.; Grubb T.D.; Guarino F.; Guedes G.P.; Guido E.; Hahn S.; Halliday R.; Hampel M.R.; Hansen P.; Harari D.; Harvey V.M.; Haungs A.; Hebbeker T.; Heck D.; Hill G.C.; Hojvat C.; Hörandel J.R.; Horvath P.; Hrabovský M.; Huege T.; Hulsman J.; Insolia A.; Isar P.G.; Johnsen J.A.; Jurysek J.; Kääpä A.; Kampert K.H.; Keilhauer B.; Kemp J.; Klages H.O.; Kleifges M.; Kleinfeller J.; Köpke M.; Kukec Mezek G.; Lago B.L.; Lahurd D.; Lang R.G.; Leigui De Oliveira M.A.; Lenok V.; Letessier-Selvon A.; Lhenry-Yvon I.; Lo Presti D.; Lopes L.; López R.; Lorek R.; Luce Q.; Lucero A.; Machado Payeras A.; Malacari M.; Mancarella G.; Mandat D.; Manning B.C.; Manshanden J.; Mantsch P.; Marafico S.; Mariazzi A.G.; Mariş I.C.; Marsella G.; Martello D.; Martinez H.; Martínez Bravo O.; Mastrodicasa M.; Mathes H.J.; Matthews J.; Matthiae G.; Mayotte E.; Mazur P.O.; Medina-Tanco G.; Melo D.; Menshikov A.; Merenda K.-D.; Michal S.; Micheletti M.I.; Miramonti L.; Mockler D.; Mollerach S.; Montanet F.; Morello C.; Mostafá M.; Müller A.L.; Muller M.A.; Mulrey K.; Mussa R.; Muzio M.; Namasaka W.M.; Nellen L.; Nguyen P.H.; Niculescu-Oglinzanu M.; Niechciol M.; Nitz D.; Nosek D.; Novotny V.; NoŽka L.; Nucita A.; Núñez L.A.; Palatka M.; Pallotta J.; Panetta M.P.; Papenbreer P.; Parente G.; Parra A.; Pech M.; Pedreira F.; P ©kala J.; Pelayo R.; Peña-Rodriguez J.; Perez Armand J.; Perlin M.; Perrone L.; Peters C.; Petrera S.; Pierog T.; Pimenta M.; Pirronello V.; Platino M.; Pont B.; Pothast M.; Privitera P.; Prouza M.; Puyleart A.; Querchfeld S.; Rautenberg J.; Ravignani D.; Reininghaus M.; Ridky J.; Riehn F.; Risse M.; Ristori P.; Rizi V.; Rodrigues De Carvalho W.; Rodriguez Fernandez G.; Rodriguez Rojo J.; Roncoroni M.J.; Roth M.; Roulet E.; Rovero A.C.; Ruehl P.; Saffi S.J.; Saftoiu A.; Salamida F.; Salazar H.; Salina G.; Sanabria Gomez J.D.; Sánchez F.; Santos E.M.; Santos E.; Sarazin F.; Sarmento R.; Sarmiento-Cano C.; Sato R.; Savina P.; Schäfer C.; Scherini V.; Schieler H.; Schimassek M.; Schimp M.; Schlüter F.; Schmidt D.; Scholten O.; Schovánek P.; Schröder F.G.; Schröder S.; Schulz A.; Sciutto S.J.; Scornavacche M.; Shellard R.C.; Sigl G.; Silli G.; Sima O.; Šmída R.; Sommers P.; Soriano J.F.; Souchard J.; Squartini R.; Stadelmaier M.; Stanca D.; Stanič S.; Stasielak J.; Stassi P.; Streich A.; Suárez-Durán M.; Sudholz T.; Suomijärvi T.; Supanitsky A.D.; Šupík J.; Szadkowski Z.; Taboada A.; Tapia A.; Timmermans C.; Tkachenko O.; Tobiska P.; Todero Peixoto C.J.; Tomé B.; Torralba Elipe G.; Travaini A.; Travnicek P.; Trimarelli C.; Trini M.; Tueros M.; Ulrich R.; Unger M.; Urban M.; Vaclavek L.; Vacula M.; Valdés Galicia J.F.; Valiño I.; Valore L.; Van Vliet A.; Varela E.; Vargas Cárdenas B.; Vásquez-Ramírez A.; Veberič D.; Ventura C.; Vergara Quispe I.D.; Verzi V.; Vicha J.; Villaseñor L.; Vink J.; Vorobiov S.; Wahlberg H.; Watson A.A.; Weber M.; Weindl A.; Wiencke L.; Wilczyński H.; Winchen T.; Wirtz M.; Wittkowski D.; Wundheiler B.; Yushkov A.; Zapparrata O.; Zas E.; Zavrtanik D.; Zavrtanik M.; Zehrer L.; Zepeda A.; Ziolkowski M.; Zuccarello F.; (The Pierre Auger Collaboration)
      We report a measurement of the energy spectrum of cosmic rays for energies above 2.5×1018 eV based on 215,030 events recorded with zenith angles below 60°. A key feature of the work is that the estimates of the energies ...

    • Multi-model Environment Generation and Tailoring Model for Software Process Improvement 

      Gasca-Hurtado G.P.; Londoño J.A.H.; Muñoz M.
      Software development organizations take great risks when are faced with process improvement projects and the inclusion of best practices. Such risks include the selection of a standard, framework or model for the improvement ...

    • Multivector Variate Distributions 

      Díaz-García J.A.; Caro-Lopera F.J.; Ramírez F.O.P.
      A new family of multivariate distributions under elliptical models is proposed in this work. Several particular cases of this multivector variate distributions are obtained and a number of published multivariate distributions ...

    • Mapping spatial variability of quality of life in the city of Medellín, Colombia 

      Sepúlveda-Murillo F.H.; Soto-Builes N.M.; Checa-Olivas M.; Chica-Olmo J.
      The study of subjective welfare or perceived quality of life (QoL) is currently a topic of interest in the social sciences due to its implications for the design and evaluation of social and economic policies. To this end, ...

    • Mapping SETMAT practices to SPEM 

      Cruz P.; Gomez-Alvarez M.C.; Astudillo H.
      ESSENCE, the Software Engineering Method and Theory (SEMAT) extensible Kernel, allows description of software development initiatives. One of the extensions is SETMAT, the Software Engineering Teaching Method and Theory, ...

    • Mathematical programming modeling for joint order batching, sequencing and picker routing problems in manual order picking systems 

      Cano J.A.; Correa-Espinal A.A.; Gómez-Montoya R.A.
      This article aims to introduce mathematical programming models for the joint order batching and picker routing problem (JOBPRP) and the joint order batching, sequencing and routing problem (JOBSPRP). For this purpose, we ...

    • Local and Global: The State against transnational crime [Local y global: El Estado frente al delito transnacional] 

      Bustamante P.P.
      Transnational organized crime (cot) is one of the main affectations to nation states in the contemporary world, to such an extent that in many occasions criminal networks exceed the capacity of institutions. The objective ...

    • KrCl and XeCl excilamps and LP-Hg lamp for UV and UV/H2O2 decolourization of dyes in water 

      Aristizábal A.; Perilla G.; Lara-Borrero J.A.; Diez R.
      In the present study, the decolourization efficiencies of LP-Hg lamp, XeCl and KrCl excilamps at the same power density were compared for the decolourization of dyes in water by UV and UV/H2O2 processes in a batch reactor. ...

    • Interdisciplinary Approach of the Design Process for the Application of New Materials in Wheelchair Design 

      Chacon-Cifuentes P.; Zuleta-Gil A.; Cadavid G.S.; Valencia-Escobar A.; Correa-Bedoya E.; Echeverria-Echeverria F.
      The appropriation of new technology requires the design and development of products that are accepted by the market. Developing such products is a complex task that usually requires the integration of knowledge from multiple ...

    • Interdisciplinary analysis of hazardous hospital waste management in tertiary hospitals in Medellin 

      Villegas-Arias G.C.; Betancur-Vélez M.; Agudelo-Cadavid R.M.; Hoyos-López A.
      Medellín is a region where opportunities have been identified to improve the system for managing hazardous hospital waste (HHW). This study combines research methods of administration, environmental engineering, and public ...