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Aproximadamente 30 registro(s) hasta el momento: (knowledge)

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Recurso libre

Teaching safety precautions in a laboratory DVE: the effects of information location and interactivity
Zayas Pérez,Benjamin - Cox,Richard

Formato:	journal article
Enlaces:	Information location and interactivity are two attributes of desktop virtual environment (DVE) design that can be exploited to enhance the ability of learners to acquire information and skills that transfer to real world. The term "information location" refers to the…
Fecha:	2009-09-01
Recurso:	SCIELO

Recurso libre

Interpretation and Social Knowledge: On the Use of Theory in the Human Sciences
Arteaga Botello,Nelson

Formato:	journal article
Enlaces:	Descripción completa.
Fecha:	2013-04-01
Recurso:	SCIELO

Recurso libre

Indexing and Comparison of Multi-Dimensional Entities in a Recommender System based on Ontological Approach
Bakaev,Maxim - Avdeenko,Tatiana

Formato:	journal article
Enlaces:	The paper describes an application of indexing-the technology currently widely used for processing and comparing textual information-to multi-dimensional entities of knowledge domains. We propose a model for building a frame-based ontology, which contains a domain conceptual model as well as…
Fecha:	2013-03-01
Recurso:	SCIELO

Recurso libre

Continuous groups of transformations and time-dependent invariants
Gelover-Santiago,A.L. - Corona-Galindo,M.G.

Formato:	journal article
Enlaces:	In this paper we present a very simple derivation of the constants of motion for dynamical systems, which requires only an elementary knowledge of the theory of continuous groups. In addition, through the infinitesimal Lorenz transformations group, we obtain a…
Fecha:	2007-06-01
Recurso:	SCIELO

Recurso libre

Smokers' reactions to cigarette package warnings with graphic imagery and with only text: a comparison between Mexico and Canada
Thrasher,James F - Hammond,David - Fong,Geoffrey T - Arillo-Santillán,Edna

Formato:	journal article
Enlaces:	OBJECTIVE: This comparison of population-based representative samples of adult smokers in Canada (n=1 751) and Mexico (n=1 081) aimed to determine whether cigarette packages with graphic warning labels in Canada had a stronger impact than the text-only warning labels in…
Fecha:	2007-01-01
Recurso:	SCIELO

Recurso libre

A Knowledge-Base Oriented Approach for Automatic Keyword Extraction
Jean-Louis,Ludovic - Gagnon,Michel - Charton,Eric

Formato:	journal article
Enlaces:	Automatic keyword extraction is an important subfield of information extraction process. It is a difficult task, where numerous different techniques and resources have been proposed. In this paper, we propose a generic approach to extract keyword from documents using encyclopedic…
Fecha:	2013-06-01
Recurso:	SCIELO

Recurso libre

On the potential of an infinite dielectric cylinder and a line of charge: Green's function in an elliptic coordinate approach
Marín,J.L. - Marín-Enriquez,I. - Riera,R. - Pérez-Enriquez,R.

Formato:	journal article
Enlaces:	A two-dimensional Laplace equation is separable in elliptic coordinates and leads to a Chebyshev-like differential equation for both angular and radial variables. In the case of the angular variable η (-1 < η < 1), the solutions are the well…
Fecha:	2007-06-01
Recurso:	SCIELO

Recurso libre

Effect of imperfect knowledge of hazards on the reliability of concrete face rockfill dam and breakwater
De León-Escobedo,D. - Fuentes-Mariles,O.

Formato:	journal article
Enlaces:	A formulation to treat aleatory and epistemic uncertainties, in a separate way, on infrastructures is proposed and applied to a dam and a breakwater in Mexico. The purpose of that is to de termine 2nd order bounds on the reliability…
Fecha:	2008-09-01
Recurso:	SCIELO

Recurso libre

Low-complexity chaotic encryption system
Hasimoto-Beltrán,R

Formato:	journal article
Enlaces:	Secure multimedia communication presents new challenges that are difficult to handle using by currently adopted encryption schemes (RSA-Rivest-Shamir-Adelman, AES-Advanced Encryption Standard, and IDEA-International Data Encryption algorithm) (28). It requires the processing of huge amounts of information at speeds ranging from…
Fecha:	2007-02-01
Recurso:	SCIELO

Recurso libre

10.

Photometry of polar-ring galaxies
Godínez-Martínez,Arturo - Watson,Alan M. - Matthews,Lynn D. - Sparke,Linda S.

Formato:	journal article
Enlaces:	We have obtained photometry in B and R for seven confirmed or probable polar-ring galaxies from the Polar-Ring Catalog of Whitmore et al. (1990). The rings show a range of colors from B -R ≈ 0.6 to B - R…
Fecha:	2007-10-01
Recurso:	SCIELO

Recurso libre

11.

Cognitive Maps: an Overview and their Application for Student Modeling
Peña,Alejandro - Sossa,Humberto - Gutiérrez,Agustin

Formato:	journal article
Enlaces:	In this paper we state how Cognitive Maps can be used to model causal phenomena. In addition, we show the application of the Cognitive Maps to the field of the Student Modeling. Conceptually speaking, Cognitive Maps set and simulate the…
Fecha:	2007-03-01
Recurso:	SCIELO

Recurso libre

12.

Cleaner production and innovation theory; social experiments as a new model to engage in cleaner production
DIELEMAN,Hans

Formato:	journal article
Enlaces:	This paper discusses the concept of cleaner production and proposes a new model to stimulate cleaner production, in the first section the historical development of cleaner production is sketched. It is indicated that the approach gained much attention in the…
Fecha:	2007-06-01
Recurso:	SCIELO

Recurso libre

13.

Single-Document Keyphrase Extraction for Multi-Document Keyphrase Extraction
Berend,Gábor - Farkas,Richárd

Formato:	journal article
Enlaces:	Here, we address the task of assigning relevant terms to thematically and semantically related sub-corpora and achieve superior results compared to the baseline performance. Our results suggest that more reliable sets of keyphrases can be assigned to the semantically and…
Fecha:	2013-06-01
Recurso:	SCIELO

Recurso libre

14.

Recognition of system behaviours based on temporal series similarity
Llanos,D - Cuberos,F.J. - Meléndez,J - Gamero,Fco. I. - Colomer,J - Ortega,J.A.

Formato:	journal article
Enlaces:	There are different approaches to the temporal study of time evolving systems. This paper reviews previous works related to time series and it evaluates three approaches focused to the comparison of these type of series. Two approaches are based on…
Fecha:	2003-09-01
Recurso:	SCIELO

Recurso libre

15.

Individual risk factors for Plasmodium vivax infection in the residual malaria transmission focus of Oaxaca, Mexico
Danis-Lozano,Rogelio - Rodríguez,Mario Henry - Betanzos-Reyes,Ángel F - Hernández-Avila,Juan Eugenio - González-Cerón,Lilia - Méndez-Galván,Jorge F - Velázquez-Monroy,Oscar J - Tapia-Conyer,Roberto

Formato:	journal article
Enlaces:	OBJECTIVE: To identify individual risk factors for malaria infection of inhabitants in the residual transmission focus on the Pacific coast of Oaxaca, Mexico. MATERIALS AND METHODS: A population-based, matched case-control study was conducted from January 2002 to July 2003 comparing…
Fecha:	2007-06-01
Recurso:	SCIELO

Recurso libre

16.

Intelligent Techniques for R & D Project Selection in Large Social Organizations
Fernandez,Eduardo - Lopez,Fernando - Navarro,Jorge - Duarte,Alfonso

Formato:	journal article
Enlaces:	Funding R&D projects is perhaps the most important task faced by large public organizations, in charge of promoting science and technology in different countries. However, most popular ways to solve this decision problem are based on too simple decision models…
Fecha:	2006-09-01
Recurso:	SCIELO

Recurso libre

17.

Spectroscopic Determination of Optimal Hydration Time of Zircon Surface
Ordóñez-Regil,Eduardo - García-Rosales,Genoveva - García-González,Nidia

Formato:	journal article
Enlaces:	When a mineral surface is immersed in an aqueous solution, it develops an electric charge produced by the amphoteric dissociation of hydroxyl groups created by the hydration of the solid surface. This is one influential surface property. The complete hydration…
Fecha:	2010-09-01
Recurso:	SCIELO

Recurso libre

18.

Soil genesis in a marine terrace sequence of Sicily, Italy
Wagner,Stephen - Costantini,Edoardo A.C. - Sauer,Daniela - Stahr,Karl

Formato:	journal article
Enlaces:	Knowledge about the rates of pedogenic processes is essential to understand landscape development and history. It can be attained by the quantitative investigation of soil chronosequences. In this work, the development of Chromic Luvisols in the Mediterranean is addressed. The…
Fecha:	2007-08-01
Recurso:	SCIELO

Recurso libre

19.

Discourses and polarities concerning health promotion in the Brazilian health system
Luciana,Kind - Neto,João Leite Ferreira

Formato:	journal article
Enlaces:	This paper presents theoretical reflections on health promotion in the Brazilian public health context. Some characteristics and problems of the international debate are highlighted, but our focus is the position of health promotion as it is discussed in the Brazilian…
Fecha:	2013-08-01
Recurso:	SCIELO

Recurso libre

20.

Morphology of the first and second instars larvae of Peckia (Peckia) chrysostoma (Wiedemann, 1830) (Diptera, Sarcophagidae)
Buenaventura,Eliana

Formato:	journal article
Enlaces:	The morphology of larval stages of Diptera (Insecta) is little known, especially in the case of Sarcophagidae family larvae. Interest in sarcophagid larvae studies has increased with the step forward of forensic entomology, where they are considered potential indicators of…
Fecha:	2013-04-01
Recurso:	SCIELO

Recurso libre

21.

Backpropagation through Time Algorithm for Training Recurrent Neural Networks using Variable Length Instances
Grau,Isel - Nápoles,Gonzalo - Bonet,Isis - García,María Matilde

Formato:	journal article
Enlaces:	Artificial Neural Networks (ANNs) are grouped within connectionist techniques of Artificial Intelligence. In particular, Recurrent Neural Networks are a type of ANN which is widely used in signal reproduction tasks and sequence analysis, where causal relationships in time and space…
Fecha:	2013-03-01
Recurso:	SCIELO

Recurso libre

22.

A Supervised Approach for Reconstructing Thread Structure in Comments on Blogs and Online News Agencies
Balali,Ali - Faili,Hesham - Asadpour,Masoud - Dehghani,Mostafa

Formato:	journal article
Enlaces:	There is a great deal of knowledge in online environments such as forums, chats and blogs. A large volume of comments with different subjects on a page has created a lot of complexity in following the actual conversation streams, since…
Fecha:	2013-06-01
Recurso:	SCIELO

Recurso libre

23.

Reaching High Interactive Levels with Situated Agents
Ibarra-Martínez,S. - Castán-Rocha,J.A. - Laria-Menchaca,J. - Guzmán-Obando,J. - Castán-Rocha,E.

Formato:	journal article
Enlaces:	The paper presents a coordinated process through which the situated agents are capable of working jointly using knowledge about their skills to interact with other similar entities. A good coordination is reached because each situated agent is able to represent…
Fecha:	2013-03-01
Recurso:	SCIELO

Recurso libre

24.

Intraslab Mexican earthquakes of 27 April 2009 (Mw5.8) and 22 May 2009 (Mw5.6): a source and ground motion study

Formato:	journal article
Enlaces:	Two types of intraslab earthquakes in the subducted Cocos plate occur below Guerrero, Mexico, and adjacent areas: (A) steeply-dipping thrust earthquakes, and (B) normal-faulting earthquakes. Type A events are located ~10-35 km from the coast at a depth of ~35…
Fecha:	2010-09-01
Recurso:	SCIELO

Recurso libre

25.

Fibrinolytic therapy in left side-prosthetic valve acute thrombosis: In depth systematic review
Reyes-Cerezo,Esteban - Jerjes-Sánchez,Carlos - Archondo-Arce,Támara - García-Sosa,Anabel - Garza-Ruiz,Ángel - Ramírez-Rivera,Alicia - Ibarra-Pérez,Carlos

Formato:	journal article
Enlaces:	Background: Limited data are available on the impact and safety of fibrinolytic therapy (FT) in left - side prosthetic valve acute thrombosis (PVAT). Study objective: To improve our knowledge about the FT role in left -side PVAT. Design: Bibliographic search…
Fecha:	2008-09-01
Recurso:	SCIELO

Recurso libre

26.

Analysis of indices of extreme temperature events at Apizaco, Tlaxcala, Mexico: 1952-2003
LÓPEZ-DÍAZ,F. - CONDE,C.

Formato:	journal article
Enlaces:	In recent years in Mexico and around the world, the scientific community has shown great interest in acquiring knowledge regarding the behavior of extreme climate events due to their increasing number and intensity. The objective of this research was to…
Fecha:	2013-06-01
Recurso:	SCIELO

Recurso libre

27.

Climate change and its effects on urban spaces in Chile: A summary of research carried out in the period 2000-2012
MONSALVES-GAVILÁN,P. - PINCHEIRA-ULBRICH,J. - ROJO MENDOZA,F.

Formato:	journal article
Enlaces:	We have systematized the effects associated with climate change on urban spaces in Chile reported between 2000 and 2012. The method was based on a review of scientific articles in three databases (Scopus, Web of Knowledge and Scielo) using 32…
Fecha:	2013-10-01
Recurso:	SCIELO

Recurso libre

28.

Foliar micromorphology of Mexican oaks (Quercus: Fagaceae)
Scareli-Santos,Claudia - Sánchez-Mondragón,María L. - González-Rodríguez,Antonio - Oyama,Ken

Formato:	journal article
Enlaces:	Mexico is the main center of diversity of the genus Quercus in the Western Hemisphere. Despite recent advances in the knowledge of Mexican oaks, a degree of taxonomic confusion still remains, mainly within particular species complexes. In this study, scanning…
Fecha:	2013-07-01
Recurso:	SCIELO

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29.

Adolescent adjustment in at-risk families: The role of psychosocial stress and parental socialization
Lorence Lara,Bárbara - Hidalgo García,Ma. Victoria - Dekovic,Maja

Formato:	journal article
Enlaces:	Introduction The study of factors associated with internalizing and externalizing problems in adolescents living in at-risk families is a subject of recent interest in mental health in Spain. The presence of mental health problems in children and adolescents is too…
Fecha:	2013-02-01
Recurso:	SCIELO

Recurso libre

30.

Chlorine in the stratosphere
VON CLARMANN,T.

Formato:	journal article
Enlaces:	This paper reviews the various aspects of chlorine compounds in the stratosphere, both their roles as reactants and as tracers of dynamical processes. In the stratosphere, reactive chlorine is released from chlorofluorocarbons and other chlorine-containing organic source gases. To a…
Fecha:	2013-06-01
Recurso:	SCIELO