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Nomenclatura Unesco > (31) Ciencias Agrarias > (3103) Agronomía > (3103.10) Pastos

Mostrando recursos 1 - 20 de 102.860

1. Wake Field And The Diffraction Model Due To A Flat Beam Moving Past A Conducting Wedge - Moving Past,A Conducting Wedge
INTRODUCTION To clean a beam of its excessive tail particles, one often uses a collimator. If the beam intensity is high enough or if the beam is broughttoo close to the collimator, however, the wake fields generated by the beam-collimator interaction can cause additional beam tails to grow, thus defeating, or even worsening the beamtail cleaning process. The wake field generated by a sheet beam moving past a conducting wedge has been obtained in closed form by Henke using the method of conformal mapping.[1] This result is applied in the present work to obtain the wake force and the transverse kick received by a test charge moving with the beam. For...

2. El papel de los herbívoros en la conservación de los pastos - Aldezabal Roteta, Arantza; García González, Ricardo; Gómez García, Daniel; Fillat Estaqué, Federico
Tradicionalmente, las áreas pastorales del Pirineo han constituido la base de la economía local, albergando además una parte importante de su valor paisajístico y de su riqueza biológica. Los cambios de uso de muchas de estas áreas, a veces amparadas por figuras de protección, dan lugar a numerosos interrogantes. Ello se debe a que, a diferencia de otro tipo de ambientes, la conservación de los pastos está vinculada al mantenimiento del pastoreo. Algunos estudios parecen haber demostrado que existe una relación estrecha entre el cese o declive paulatino del pastoreo y la pérdida de diversidad vegetal en las comunidades utilizadas, concluyendo que la mayor diversidad...

3. Fake Past - Sumiyo Nishiguchi
Abstract. It has been argued that in some languages, attitude verbs shift the reference of indexicals in the embedded clauses [1, 2, 3]. I argue that not only overt attitude predicates but also implicit emotive modality is a context-shifting operator that changes the context parameters. I base my argument on the following three mono-clausal constructions: (i) fake past (ii) fake present, and (iii) discourse initial sentence focus also/even/too. Surprise licenses non-past interpretation of the past tense [4] with negative presupposition. Alternation between past and present directs readers to re-experience narratives [5]. A speaker’s emotion or sentiment licenses wide-scope also/too without...

4. Consistencia, Fluidez y Viscosidad de Pastas Minerales de Relaves de Hierro - Araujo, A. C. de; Valadao, G. E. S.; Da Gama, E. M.; Hernández, C. A.
Se presentan las características de viscosidad aparente, altura de abatimiento y ángulo de reposo de pastas minerales preparadas a partir de una mezcla lama/relave de hierro, además de algunas características del componente sólido de la pasta. La metodología aplicada para caracterizar las pastas minerales considera el uso de ensayos de abatimiento (slump), de canaleta (flume) y viscosimetría. Los resultados muestran que la parte sólida correspondiente a la mezcla de relaves está compuesta predominantemente de hematita con menores cantidades de cuarzo, goetita, gibsita y caolinita, con una distribución granulométrica muy fina (inferior a 25 mm); los ensayos de abatimento y de...

5. La ganadería oriolana en el siglo XV : la regulación de los pastos - Barrio Barrio, Juan Antonio
El análisis de la regulación de los pastos es uno de los aspectos más interesantes de la ganadería valenciana en la Baja Edad Media. El objetivo de este trabajo es el estudio de su control en Orihuela, dentro el contexto de la problemática general de la organización social del espacio peninsular. Durante el siglo XV se va a desarrollar la progresiva privatización de los pastos, llevada a cabo por los propietarios de alquerías y señoríos jurisdiccionales.

6. La ganadería oriolana en el siglo XV : la regulación de los pastos - Barrio Barrio, Juan Antonio
El análisis de la regulación de los pastos es uno de los aspectos más interesantes de la ganadería valenciana en la Baja Edad Media. El objetivo de este trabajo es el estudio de su control en Orihuela, dentro el contexto de la problemática general de la organización social del espacio peninsular. Durante el siglo XV se va a desarrollar la progresiva privatización de los pastos, llevada a cabo por los propietarios de alquerías y señoríos jurisdiccionales.

7. The Early-age short-term creep of hardening cement - Paste Ac Impedance; B. T. Beaudoin; Basile T. Tamtsia A; James J. Beaudoin A; Jacques March
Impedance spectra were monitored at early ages on hydrating Portland cement pastes subjected to a sustained load. The pastes were prepared with two different water-cement ratios (0.35 and 0.50). The experiments were conducted in a controlled chamber maintained at (96 2)% relative humidity. The three ages at loading investigated were 18, 24 and 30 hours. Real-time changes in paste microstructure due to sustained load were followed through the coupling of an AC impedance frequency analyzer with a miniature loading system. Cement paste specimens were in the form of "T-shaped" columns with a minimum thickness value (for the web and flanges)...

8. A Browser for Browsing the Past Web - Adam Jatowt; Yukiko Kawai; Satoshi Nakamura; Yutaka Kidawara; Katsumi Tanaka
We describe a browser for the past web. It can retrieve data from multiple past web resources and features a passive browsing style based on change detection and presentation. The browser shows past pages one by one along a time line. The parts that were changed between consecutive page versions are animated to reflect their deletion or insertion, thereby drawing the user’s attention to them. The browser enables automatic skipping of changeless periods and filtered browsing based on user specified query.

9. Experimental Test of Possible Psychological Benefits of Past-Life Regression - Kellye Woods; Imants Baruƒs
Abstract—The purpose of this study was to determine whether past-life regression can lead to increased psychological well-being and changes in fundamental beliefs about consciousness and reality among those who are psychologically healthy. Twenty-four undergraduate students each participated in a single guided imagery session in which they were given either a past-life or open suggestion. Participants who were given the past-life suggestion had better scores on some measures of psychological well-being than those given the open suggestion, although post-hoc tests did not reveal any differences in psychological well-being or beliefs between those who actually experienced past-life imagery and those who did...

10. The Present Past.
This paper has two points: (1) present work arrangements and artifacts cannot be understood without an historical account of past failures and countermeasures; therefore the paper presents a framework that combines both synchronic and diachronic viewpoints. (2) Cooperation is but one way of solving problems and therefore competes with other solutions, such as changing artifacts, layout and skills. These two points are illustrated with examples from the maritime domain.

11. Reconocimiento de nematodos en pastos tropicales en las comunidades de Sucre y San Vicente, cantón de San Carlos - WingChing-Jones, Rodolfo; Salazar, Luis; Flores Chávez, Lorena; Rojas-Bourrillón, Augusto
Para determinar la presencia de nematodos fitoparásitos en pastos tropicales en la zona alta de San Carlos; se muestrearon 6 pastos de piso y 1 de corta, se recolectó muestras de raíces y de suelo en mayo y setiembre de 2003. El pasto Camerún (Pennisetum purpureum var Camerún) fue el único ejemplar de corta y Decumbens (Brachiaria decumbens), Estrella (Cynodom nlemfluensis), Tanner (Brachiaria radicans), San Juan (Setaria ancept), Guinea (Panicum maximun), y Kikuyo (Pennisetum clandestinum), los pastos de piso. Los nematodos identificados pertenecen a los géneros Pratylenchus sp, Helicotylenchus sp, Tylenchus sp, Psylenchus sp, Ditylenchus sp, Criconemella sp, Xiphinema sp, Trichodorus sp, Hemicycliophora sp, Meloidogyne sp, y a nematodos no fitoparásitos.

12. I Foro Iberoamericano de Pastos en la Universidad de Alicante - Ríos Ruiz, Segundo

13. I Foro Iberoamericano de Pastos en la Universidad de Alicante - Ríos Ruiz, Segundo

14. Influence of vinyl acetate-versatic vinylester copolymer on the microstructural characteristics of cement pastes - Gomes,Carlos Eduardo Marmorato; Ferreira,Osny Pellegrino; Fernandes,Mauro Roberto
To understand the principles of polymer modification and its interference in the formation of some phases of Portland cement composites, several techniques are adopted such as Fourier Transform Infrared Spectroscopy and Thermogravimetric Analysis. In this study, these techniques were adopted to verify the influence of VA/VeoVA copolymer in seven pastes of high-early-strength portland cement twenty-eight days old, being four pastes with different polymer content and the same water/cement ratio, and the other three with extra water content increased by polymer content. In addition, scanning electronic microscopy was employed to verify the formation of copolymer film. The results showed possible interaction...

15. Efeito da suplementação protéica a pasto sobre consumo de forragens, ganho de peso e condição corporal, em vacas Nelore - Ruas,José Reinaldo Mendes; Torres,Ciro Alexandre Alves; Valadares Filho,Sebastião de Campos; Pereira,José Carlos; Borges,Lazáro Eustáquio; Marcatti Neto,Alberto
O objetivo do presente trabalho foi verificar o efeito da utilização de concentrado protéico, durante a época de verão, sobre consumo de forragem e variação no ganho de peso e no escore da condição corporal após o parto. Foram utilizadas 51 vacas paridas da raça Nelore, distribuídas ao acaso nos seguintes tratamentos: T0 = sem suplementação; T1 = suplementação com 1 kg; e T2 = suplementação com 2 kg de concentrado contendo 40,8% de PB, durante 105 dias. Neste período, foram determinados o escore corporal e o peso. Para determinar o consumo, utilizaram-se o marcador externo óxido de cromo, em...

16. Cut and Paste - Paolo Atzeni
The paper develops Editor, a language for manipulating semi-structured documents, such as the ones typically available on the Web. Editor programs allow to search and restructure a document. They are based on two simple ideas, taken from text editors: "search" instructions are used to select regions of interest in a document, and "cut & paste" to restructure them. We study the expressive power and the complexity of these programs. We show that they are computationally complete, in the sense that any computable document restructuring can be expressed in Editor. We also study the complexity of a safe subclass of programs, showing that it captures exactly the class of polynomial-time restructurings. The language...

17. Cut and Paste - Paolo Atzeni
The paper develops Editor, a language for manipulating semi-structured documents, such as the ones typically available on the Web. Editor programs are based on two simple ideas, taken from text editors: "search" instructions are used to select regions of interest in a document, and "cut & paste" to restructure them. We study the expressive power and the complexity of these programs. We show that they are computationally complete, in the sense that any computable document restructuring can be expressed in Editor. We also study the complexity of a safe subclass of programs, showing that it captures exactly the class of polynomial-time restructurings. The language has been implemented...

18. Cut and Paste - Paolo Atzeni
The paper develops Editor, a language for manipulating semi-structured documents, such as the ones typically available on the Web. Editor programs allow to search and restructure a document. They are based on two simple ideas, taken from text editors: "search" instructions are used to select regions of interest in a document, and "cut & paste" to restructure them. We study the expressive power and the complexity of these programs. We show that they are computationally complete, in the sense that any computable document restructuring can be expressed in Editor. We also study the complexity of a safe subclass of programs, showing that it captures exactly the class of polynomial-time restructurings. The language...

19. Cut and Paste - Paolo Atzeni
The paper develops Editor, a language for manipulating semi-structured documents, such as the ones typically available on the Web. Editor programs are based on two simple ideas, taken from text editors: "search" instructions are used to select regions of interest in a document, and "cut & paste" to restructure them. We study the expressive power and the complexity of these programs. We show that they are computationally complete, in the sense that any computable document restructuring can be expressed in Editor. We also study the complexity of a safe subclass of programs, showing that it captures exactly the class of polynomial-time restructurings. The language has been implemented...

20. Past Tense Learning - Amit Almor
INTRODUCTION The English past tense, a seemingly simple linguistic phenomenon that has come to epitomize the latest round in the centuries old debate between rationalists and empiricists, exemplifies the processes that more generally handle the formation of words and their structure. These processes have been traditionally studied by the linguistics field of morphology, which has assumed a level of representation that is based on the smallest meaning-bearing linguistic units, called morphemes. The main goal of linguistic morphology has been to systematically identify morphemes and describe the principles that govern the way they are used to form words (See Spencer & Zwicky, 1998, for current issues in linguistic morphology)....

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