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Registros recuperados: 1.575
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Recovery and Reuse of Rural buildings: The Spread Out Building Case CIGR Journal
A. Candura; Dipartimento di Progettazione e Gestione dei Sistemi Agricoli e Forestali.
The slow but continuous flight from the countryside leads to the abandonment and consequent deterioration of rural constructions. Therefore the problem of their recovery, also for diversified uses, arises. The reuse problem becomes more heightened in case of small-sized constructions;hence special forms of recovery need to be identified to enable their reuse focused on functional integration.This paper tackles the problem by illustrating a study case concerning the Gargano, a National Park and tourist area, featuring a high number of spread out houses. We propose aggregating the single building units to form a spread out accommodation facility distributed over variousconstructions.To create the above mentioned spread out hotel, an integrated recovery is...
Ano: 1969 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1249
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Simulation of Tef Seed Broadcasting CIGR Journal
A. D. Zewdu.
In this investigation broadcast seeding of tef seed was considered. In order to predict particle trajectory on and off disc, after developing a mathematical relationship, simulation of particle movement on and off disc of a spinning disc was undertaken. The terminal velocity and coefficient of drag force of tef seed were determined experimentally in laboratory. Projected distance of particle thrown off the disk was calculated by varying different particle property (such as moisture content, coefficient of friction, TGM and particle density) and machine parameters (such as cone angle and angular velocity). The projected distance of a particle increased with increase in moisture content of seed, spreader revolution per minute and inclination of disc with the...
Ano: 1969 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1273
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Vehicle Path Planning for Complete Field Coverage Using Genetic Algorithms CIGR Journal
A. E. F Ryerson; Q. Zhang.
In farming operations, one of the fundamental issues facing a farmer is the cost of running the farm. If the equipment the farmer is using can be made more efficient, the cost of farming will be reduced. One way of making agricultural equipment more efficient is to develop automated or autonomous functions for the equipment. One of the fundamental tasks for autonomous equipment is to plan the path for the equipment to travel. This paper reports the research on the feasibility of creating an automated method of path planning for autonomous agricultural equipment. Genetic algorithms were chosen to plan the paths with a primary goal of creating an optimal path guiding the equipment to completely cover a field while avoiding all known obstacles. Two example...
Ano: 1969 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/945
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Development and Ergonomic Evaluation of Manually Operated Weeder for Dry Land Crops CIGR Journal
A. K. Goel; D. Behera; B. K. Behera; S. K. Mohanty; S. K. Nanda.
A manually operated weeder for dry land crops was developed and evaluated to find its performance. It was compared with other available weeders namely wheel finger weeder, wheel hoe and conventional weeding by using trench hoe for groundnut crop at four levels of soil moisture content of 13.52, 11.63, 9.52 and 8.04 per cent (db). It was found that the heart rate, oxygen consumption rate and energy consumption rate increases with decrease in soil moisture content for all the treatments. The highest performance index of 3689.74 was obtained with developed weeder at 11.63 per cent moisture content. Lowest plant damage (2.46 to 7.96%) and lower energy consumption rate (8.34 to 40.05 kJ/min) with highest performance index (678.66 to 3689.74) of developed weeder...
Ano: 1969 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1162
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THE TECHNOLOGICAL COMPONENT OF AGRICULTURAL DEVELOPMENT AgEcon
Abel, Martin E..
Tipo: Working or Discussion Paper Palavras-chave: International Development; Research and Development/Tech Change/Emerging Technologies.
Ano: 1969 URL: http://purl.umn.edu/14221
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Sur Phlebotomus squamipleuris Newstead, 1912 et espèces voisines (Diptera : Psychodidae) IRD
Abonnenc, Emile.
Tipo: Text Palavras-chave: TAXONOMIE; MORPHOLOGIE; CARACTERE MORPHOLOGIQUE; DIFFERENCIATION; ESPECE; CLE DE DETERMINATION; REPARTITION GEOGRAPHIQUE; REGION ETHIOPIENNE; PHLEBOTOMUS SQUAMIPLEURIS; PHLEBOTOMUS GHESQUIERI; PHLEBOTOMUS DREYFUSSI; PHLEBOTOMUS INERMIS; PHLEBOTOMUS MADAGASCARIENSIS.
Ano: 1969 URL: http://www.documentation.ird.fr/hor/fdi:18890
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Phlébotomes du complexe africanus (Diptera : Psychodidae) IRD
Abonnenc, Emile; Yvore, P..
Tipo: Text Palavras-chave: TAXONOMIE; MORPHOLOGIE; CLE DE DETERMINATION; REPARTITION GEOGRAPHIQUE; PHLEBOTOMUS AFRICANUS; PHLEBOTOMUS MAGNUS.
Ano: 1969 URL: http://www.documentation.ird.fr/hor/fdi:18885
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Compte-rendu de la cinquième conférence ministérielle inter-Etats de l'OCEAC IRD
Adam, Jean-Paul.
Tipo: Text Palavras-chave: CONFERENCE; ENTOMOLOGIE MEDICALE; COOPERATION SCIENTIFIQUE; ORGANISME DE RECHERCHE; COMPTE RENDU; OCEAC; ORSTOM.
Ano: 1969 URL: http://www.documentation.ird.fr/hor/fdi:13526
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Une technique de capture de la faune cavernicole peu usitée : le piégeage lumineux, description d'un piège simple et pratique IRD
Adam, Jean-Paul.
Tipo: Text Palavras-chave: CAPTURE; PIEGE LUMINEUX; METHODOLOGIE; ETUDE COMPARATIVE; FAUNE CAVERNICOLE; PHLEBOTOMUS; ANOPHELES; URA NOTAENIA; CERATOPOGONIDAE.
Ano: 1969 URL: http://www.documentation.ird.fr/hor/fdi:28654
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Recherches en Afrique équatoriale, sur les plasmodiums de petits mammifères et leurs vecteurs : rapport d'activité sur le projet de recherches M2/181/38 (1er janvier au 31 décembre 1968) IRD
Adam, Jean-Paul.
Tipo: Text Palavras-chave: INVENTAIRE FAUNISTIQUE; VECTEUR; PARASITE; TRANSMISSION; FAUNE CAVERNICOLE; ATHERURE; PLASMODIUM ATHERURI; ANOPHELES CARONI; ANOPHELES HAMONI; POLYCHROMOPHILUS; THAMNOMYS RUTILANS; PLASMODIUM VINCKEI S. SP.; ANOPHELES CINCTUS; LISSONYCTERIS; ROUSETTUS.
Ano: 1969 URL: http://www.documentation.ird.fr/hor/fdi:14101
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Biospéléologie en Afrique noire : activités dans ce domaine des chercheurs du Centre ORSTOM de Brazzaville (entomologie médicale-préhistoire) (1948-1969) IRD
Adam, Jean-Paul.
Tipo: Text Palavras-chave: INVENTAIRE FAUNISTIQUE; GROTTE; PROGRAMME DE RECHERCHE; FAUNE CAVERNICOLE; BIOSPELEOLOGIE.
Ano: 1969 URL: http://www.documentation.ird.fr/hor/fdi:14103
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Projet de programme de recherches pour la période 1969-1975 IRD
Adam, Jean-Paul.
Tipo: Text Palavras-chave: PROGRAMME DE RECHERCHE; ENTOMOLOGIE MEDICALE; LUTTE; INSECTICIDE; FAUNE CAVERNICOLE; PHLEBOTOMUS; ANOPHELES; CULICIDAE; GLOSSINA; PLASMODIUM; TRYPANOSOMA; ORGANISATION DU LABORATOIRE.
Ano: 1969 URL: http://www.documentation.ird.fr/hor/fdi:14100
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Participation au colloque de l'OUA sur les utilisations pacifiques de l'énergie atomique en Afrique (+ note de G. Chauvet) IRD
Adam, Jean-Paul; Chauvet, Guy.
Tipo: Text Palavras-chave: RADIOACTIVITE; UTILISATION; CONGRES; PHOSPHORE 32; SOUFRE 35; ANOPHELES MELAS; ANOPHELES MERUS; GLOSSINA.
Ano: 1969 URL: http://www.documentation.ird.fr/hor/fdi:14102
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Quelques genres de mollusques prosobranches marins inconnus ou peu connus de l'Afrique occidentale OMA
Adam, W.; Knudsen, J..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Taxonomy Prosobranchia Africa; West Africa.
Ano: 1969 URL: http://www.vliz.be/imisdocs/publications/294747.pdf
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THE POLITICAL CLIMATE FOR FOOD DISTRIBUTION IN THE 1970'S AgEcon
Adamy, Clarence G..
Inflation for the first half of the decade, technological revolution in food retailing the second half.
Tipo: Journal Article Palavras-chave: Marketing.
Ano: 1969 URL: http://purl.umn.edu/26709
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Wat is „Plantago intermedia”? Naturalis
Adema, F..
The author mentions Plantago major L. subsp. pleiosperma Pilger (P. intermedia auct., non Gilib.; W. Koch, in Ber. Schw. Bot. Ges. 37, 1928, p. 45) for the first time in the Netherlands. This taxon can be distinguished from subsp. P. major subsp. major major as follows: Leaves with (3—)5—9 nerves, usually rather broadly ovate, (1 1/3—) 1½ (—2) times as long as broad, usually with an obtuse apex and a rounded base, abruptly narrowed into the petiole, usually entire and sparsely hairy. Lid of the fruit usually completely exceeding the sepals. Seeds rather large, 4—15, on the average 8—9 in a fruit. Ecology: A plant of trodden places, usually not in natural habitats. Faithful taxon of Lolio-Plantaginetum, also, but less often in Polygono-Coronopion and...
Tipo: Article / Letter to the editor
Ano: 1969 URL: http://www.repository.naturalis.nl/record/527055
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Seasonality in the Demand for Bananas AgEcon
Aggrey-Mensah, W.; Guise, John W.B..
Weekly demand functions are estimated for bananas traded on the Sydney wholesale market using data for the period 1953 to 1967. Graphs of these functions suggest that the demand for bananas varies in a systematic fashion through the year. Further research will be required before it is possible to identify the specific dynamic factors responsible for these demand shifts. However, the short-run relationships which have been estimated provide quantitive information which could be used to evaluate the potential benefits to growers of a planned marketing program.
Tipo: Journal Article Palavras-chave: Demand and Price Analysis.
Ano: 1969 URL: http://purl.umn.edu/9173
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A STUDY OF BANANA SUPPLY AND PRICE PATTERNS ON THE SYDNEY WHOLESALE MARKET: AN APPLICATION OF SPECTRAL ANALYSIS AgEcon
Aggrey-Mensah, W.; Tuckwell, N.E..
Spectral analysis is applied to weekly supply and price series for bananas traded on the Sydney wholesale market. Many interesting features are revealed such as the pronounced seasonal component and the two week lag structure between the supply and price series. These results are discussed in relation to the known behaviour of the market and some implications for marketing decisions are tentatively drawn.
Tipo: Journal Article Palavras-chave: Demand and Price Analysis.
Ano: 1969 URL: http://purl.umn.edu/23002
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A Theoretical Approach for Determining Irregularities of the Bottom of the Tillage Layer Caused by Horizontal Axis Rotary Tillers CIGR Journal
Ahmed Celik; Ismail Ozturk; Thomas R. Way.
Horizontal axis rotary tillers produce irregularities in the tillage depth when they are inappropriately operated and constructed. In such cases, mixing and breaking of soil throughout the tillage layer is not uniform and some untilled ridges will remain at the bottom determining the effect of design and operational characteristics on the height of the resultant ridges at the bottom of the tillage layer. In this study, a method based on the derived geometrical relationships between the rotary tiller operational parameters was developed to determine heights of ridges occurring at the bottom of the tillage layer. The ridge heights can be calculated for various combinations of blade peripheral speed, forward travel speed, rotor radius, and the number of...
Ano: 1969 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1168
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Elevage d'un jeune Propithèque, Lémurien folivore de Madagascar IRD
Albignac, Roland.
Tipo: Text Palavras-chave: BIOLOGIE; CROISSANCE; ELEVAGE; EXPERIMENTATION; LEMURIEN; PROPITHEQUE.
Ano: 1969 URL: http://www.documentation.ird.fr/hor/fdi:14096
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