Browse publicly accessible academic documents published in 1994.
903 documents
El uso de los medicamentos es necesario estudiarlo debido a su importancia y complejidad. Se ha conseguido tener medicamentos eficaces y valiosos pero no siempre son usados de forma apropiada. Partiendo de los criterios establecidos por la OMS para un uso racional de los…
For a Calderón-Zygmund singular integral operator T, we show that the following weighted inequality holds Z Rn|T f(y)|p w(y)dy ≤ C Z Rn |f(y)| p M[p]+1w(y)dy, where Mk is the Hardy-Littlewood maximal operator M iterated k times, and [p] is the integer part of p. Moreover, the…
DOI: 10.1112/jlms/49.2.296
This paper presents briefly a review of the different algorithms and hardware implementations for multi-input min/max operators. This allow us to show how a clever utilization of MOS devices leads to very simple current and voltage-mode min/max circuits.
Se entiende por ingeniería de playas aquella que se realiza en costas sedimentarias, provocando generalmente una respuesta rápida de la zona litoral ante las nuevas condiciones generadas. A fin de que las actuaciones en este ámbito sean lo eficiente que debieran, hay que conocer…
DOI: 10.1109/SSAP.1994.572474
Nos disponemos a realizar un breve y a la vez denso recorrido por algunos de los principios, técnicas, procesos y recursos de la Imaginería. En la actualidad se identifica y se define con el término de "Imaginería", el campo de la escultura dedicado a la talla o pintura de…
Se analiza la evolución de la Farmacia, de los nuevos planes de estudio en España, así como las características del farmacéutico español. Tras haberse reunido recientemente la Asociación Europea de Facultades de Farma cia, se proponen modelos de armonización curricular para…
Since the publication in 1957 of the work of Andrei Kolmogorov 181 in mapping a function of multiple variables by means functions of a single variable, many mathematicians and engineers try , with different degree of success and not without controversy 1191. to find the direct…
DOI: 10.1109/SSAP.1994.572475
Producción Científica
Given $\mu , \; \eta :X \rightarrow [0,1]$ we study when the equality $I_{\mu }^{T}=I_{\eta }^{T}$ holds, $T$ being a continuous t-norm, and $I_{\theta }^{T}$ the elemental preorder:\\ \[ I_{\theta }^{T}(y/x) = sup \{z\; ; \; T(\theta (x),z)\leq \theta (y) \}. \]
Bibliografia comentada de libros de la temática técnico-textil.
Presentamos en este artículo un ejemplar excepcional de thymiaterion orientalizante procedente de Extremadura. Centran nuestra atención la descripción y el estudio iconográfico de la pieza, a la vez que replanteamos el análisis contextual y funcional de estos objetos en la…
An alternative to the usual adaptive noise cancelling method devoted to removing interference is presented. In the conventional methodology to implement adaptive cancellers a reference signal is necessary correlated with the interference. This requirement (not always possible)…
DOI: 10.1109/MELCON.1994.381000
EconStor is a publication server for scholarly economic literature, provided as a non-commercial public service by the ZBW.
DOI: 10.3790/schm.114.4.573
DOI: 10.12795/astragalo.1994.i01.05
This paper details the study of systolic architectures for fuzzy rules processing made at the Hardware and Advanced Control Laboratory - INTA. The theoretical basis of these architectures is described and analysed. Likewise, the resultant schematics are simulated using a…
EconStor is a publication server for scholarly economic literature, provided as a non-commercial public service by the ZBW.
DOI: 10.3790/schm.114.1.41
EconStor is a publication server for scholarly economic literature, provided as a non-commercial public service by the ZBW.
DOI: 10.3790/ccm.27.2.291
EconStor is a publication server for scholarly economic literature, provided as a non-commercial public service by the ZBW.
DOI: 10.6092/unibo/amsacta/5124
EconStor is a publication server for scholarly economic literature, provided as a non-commercial public service by the ZBW.
DOI: 10.4102/sajbm.v25i2.846
EconStor is a publication server for scholarly economic literature, provided as a non-commercial public service by the ZBW.
DOI: 10.4102/sajbm.v25i1.839
EconStor is a publication server for scholarly economic literature, provided as a non-commercial public service by the ZBW.
DOI: 10.6092/unibo/amsacta/5135
Producción Científica
El objetivo de este trabajo se centra en el análisis de las exportaciones españolas a Rumania, y más concretamente aquellas que se refieren a los productos de gran consumo. Se muestran los principales problemas que afectan a las empresas españolas en sus relaciones comerciales…
Uno de los factores determinantes del diseño de los diques rompeolas es el relativo al tipo y peso de las piezas del manto principal, que con un talud determinado, son capaces de resistir las solicitaciones debidas al oleaje. En este artículo se realiza una revisión del estado…
Se presentan los primeros resultados de un proyecto de investigación en curso de realización cuyo objetivo es estudiar los petroglifos gallegos desde la perspectiva de la Arqueología del Paisaje. Se prima el análisis de las condiciones de emplazamiento de los grabados y de su…
DOI: 10.3989/tp.1994.v51.i2.455
Organic Chemistry is usually related to agricultural, pharmaceutical, alimentary, petroleum and derivate industries among others. However, the use of organic substances in other different industrial fields, like mining and metallurgy has increased and it is hoped that this…
DOI: 10.5565/rev/ensciencias.4487
The history of science shows that positivism was the dominant philosophy from about the end of the 19th century to the middle of the 20th century. The main objective of this article is to present a critique of positivist ideas and show how the new philosophy of science, as…
DOI: 10.5565/rev/ensciencias.4490
This essay intends to provide theoretical tools to analyze and formulate environmental education projects. The article works on theory concept, contrasting different intelectual traditions: positivism, interpretative and critical, in order to illustrate its function in the…
DOI: 10.5565/rev/ensciencias.4486
An analysis about utility, characteristics and structure of the so called «practical demonstrations» is presented in order to introduce a dynamic element in the classroom. Although in apparent contradiction with didactic modern trends that proclaim «what students are able to do…
DOI: 10.5565/rev/ensciencias.4485
This article shows the process of elaboration, and the optimal conditions for their use, of audiovisuals as backup material for chemistry classes. We distinguish between producing videos for interna1 and external use. We stress the importance of the technical quality and the…
DOI: 10.5565/rev/ensciencias.4484
In this article we have made a collection of the focuses and trends in the research on school mathematics considered as a language, which has characterized the research in the 80s and the beginning of the 90s -in contrast with the 70s decade, when the construction of concepts…
DOI: 10.5565/rev/ensciencias.4483
Detection of misconceptions by pupil's drawings permits us to have evidence of some misconceptions wich would have gone unnoticed interpreting only their vocal or writing expressions. Investigation on fossil and fossilisation, internal structure of the Earth, origin of mountains…
DOI: 10.5565/rev/ensciencias.4482
We have accomplished a simulation program of mechanics; it is developed in laboratory practice by students in their first years of physics studies ata University level. Its aim is a better understanding of the influence of the variable forces of friction in bidimensional…
DOI: 10.5565/rev/ensciencias.4481
The pre-service education of science teachers is empirically studied in the framework provided by the paradigm of alternative conceptions by means of 13 simple usual Physics questions. The rates of pre-service teachers' alternative conceptions show a strong resemblance with…
DOI: 10.5565/rev/ensciencias.4478
Obra ressenyada: C. HULLAND, H. MUNBY, Science, stories, and sense-making: a comparison of qualitative data from a wetlands unit [article de revista]. Science Education, 1994, 78 (2), pp. 117-136.
DOI: 10.5565/rev/ensciencias.4432
This paper deals with the oldest and most frustrating problem in biology, the species problem. It covers the evolution of the species concept over the last 2300 years, and its many ups and downs from Aristotle's biology till today. The author discusses the role that the modern…
DOI: 10.5565/rev/ensciencias.4430
After an analysis of the function of the learning procedures we can identify some noticeable intellectual activities: skills and strategies. By appealing to some concrete examples we can see its importance in the process of both the teaching/learning of Physics at pre-university…
DOI: 10.5565/rev/ensciencias.4427
