• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 61
  • 32
  • 16
  • 5
  • 4
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 1
  • 1
  • Tagged with
  • 141
  • 21
  • 14
  • 12
  • 12
  • 11
  • 10
  • 10
  • 10
  • 10
  • 9
  • 9
  • 9
  • 9
  • 9
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Pit Silos and How to Make Them

Paschall, A. L. 07 1900 (has links)
This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.
2

Pressures developed by silage materials in cylindrical tower silos.

Negi, S. C. (Satish Chandra) January 1974 (has links)
No description available.
3

The preparation of grass silage with home-grown products

Tworoger, George. January 1943 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1943. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 75-78)
4

Overpressures in bolted steel grain bins due to ambient temperature fluctuations /

Myers, Karl Fredrick. January 1974 (has links)
Thesis (M.S.)--Ohio State University, 1974. / Bibliography: leaf 48. Available online via OhioLINK's ETD Center
5

Desenvolvimento de um prototipo de alimentador de biomassa polidispersa

Brossard Gonzalez, Luis Enrique 17 June 2001 (has links)
Orientadores : Luis Augusto Barbosa Cortez, Oscar Antonio Braunbeck / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica / Made available in DSpace on 2018-08-01T17:58:16Z (GMT). No. of bitstreams: 1 BrossardGonzalez_LuisEnrique_M.pdf: 2490420 bytes, checksum: 5dc90fae9acc2b68271148eb65461cf2 (MD5) Previous issue date: 2001 / Resumo: Através de uma revisão bibliográfica sobre os sistemas de alimentação em geral e de biomassa polidispersa de baixa densidade em particular, estabelecem-se as características funcionais dos mesmos, destacando-se os principais aspectos positivos e negativos. Como parte central dos sistemas de alimentação que analisam-se, os silos são estudados no que se refere ao desenvolvimento de diversas tensões que estão vinculadas em deferentes graus as dificuldades de operação que provocam desde instabilidade até interrupção total do fluxo de alimentação. Partindo-se da base anterior, é realizado o projeto construção e avaliação a frio de um protótipo de um sistema de alimentação de biomassa polidispersa que elimina os silos com tremonha e apresenta uma estrutura de tensões internas favoráveis para o escoamento dos sólidos polidispersos de baixa densidade. Neste trabalho estuda-se a influência da altura da biomassa e a velocidade do removedor do fundo do silo sobre o fluxo de descarga do alimentador. Dos resultados obtidos verificou-se que dos parâmetros estudados, a velocidade do removedor foi o único que teve influência significativa sobre o fluxo de descarga / Abstract: Through a general literature review about biomass feeding systems including feeders for low density polydispersed vegetable residues, there were established functional characteristics of these devices, highlighting their main positive and negative aspects. Considering silos as the central component of a feeding system, and their relation to the development of tensions associated to operation dificulties it was verified that they cause instability and eventually interruption of discharge flow. On the basis of this information, it was projected, constructed and evaluated a prototype of a feeding system for low density polydispersed biomass. This new type of feeding systems had a satisfactory performance when working with sugar cane bagasse as evaluated by means of a two factors replicated factorial designo It is was observed that inside the new prototype biomass develope a favorable tension structure pattem that allows a steady discharge flow of polydispersed biomass. This work states the influence of the height of biomass discharge flow / Mestrado / Planejamento de Sistemas Energeticos / Mestre em Engenharia Mecânica
6

Contribuição para algumas normas operacionais da rede nacional de silos do Equador

Torres, Enrique Escudero 14 July 2018 (has links)
Orientador : Andre Tosello / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos / Made available in DSpace on 2018-07-14T13:15:17Z (GMT). No. of bitstreams: 1 Torres_EnriqueEscudero_M.pdf: 1462229 bytes, checksum: 044eb3925a00dc284b29ad11a340245d (MD5) Previous issue date: 1979 / Resumo: O teor de umidade de equilíbrio é fundamental no manuseio, na secagem e no armazenamento de produtos agrícolas. Neste trabalho, foi determinado o teor de umidade de equilíbrio para a soja, o milho e o arroz, de variedades equatorianas. Com o teor de umidade de equilíbrio e os dados climáticos, foram determinados os períodos críticos para o armazenamento dos três grãos, para os sete pontos que compõem a Rede de Silos do Equador. Foi calculado o custo de secagem para estes grãos desde a umidade inicial de 25%, até a umidade fina], recomendada para cada um deles. Com os dados das condições climáticas de cada um dos sete pontos que integram a Ride de Silos, foi calculado o tempo máximo permissível de armazenamento para o arroz, o milho e a soja / Abstract: The degree of moisture of equilibrium is very important drying and storage of agricultural products. During the present research the degree of moisture equilibrium was determined for soybean, corn and rice of equatorial varieties. Critical periods for storage were calculated based on the degree of moisture of equilibrium and climatic data for the seven locations which omprise the storage network in Ecuador. Drying costs for the three crops were calculated for humidities between the initial value of 2 5% to up to the commended final humidity for each crop. Maximum permissible storage time for rice, corn and soybean was calculated based on climatic conditions prevalent on those seven locations / Mestrado / Mestre em Tecnologia de Alimentos
7

Some physical characteristics and exposure loss estimates of pea vine silage in a horizontal silo

Campbell, William Earl January 1959 (has links)
Reports of large losses from exposed horizontal silos under high fall and winter rainfall were investigated by field observation on a full scale test silo. Density, dry matter, permeability and some proximate analyses of the silage are tabulated. Observed dry matter losses in order of magnitude are fermentation losses, sub surface losses, surface losses, and losses in runoff and effluent liquids. The value of these losses was computed. The best method of reducing the storage losses was a plastic sheet laid over the silage immediately after filling and packing. / Applied Science, Faculty of / Chemical and Biological Engineering, Department of / Graduate
8

Circular and rectangular folk silos in the Andes of Southern Bolivia

Kent, Robert B. 10 April 2018 (has links)
This paper documents the presence, characteristics, and distribution of folk silos (crop storage structures) in the southern portion of the department of Cochabamba, Bolivia. Known locally as trojes or silos, these silos are constructed in circular and rectangular plans from adobe and local plant materials. Circular silos are used primarily to store com, while a wider variety of crops, including potatoes, peanuts, wheat, and barley are stored in the rectangular silos. A review of the literature on crop storage structures in the Andean region suggests that the design and use of these present-day silos is likely of Inca origin.
9

Pressures developed by silage materials in cylindrical tower silos.

Negi, S. C. (Satish Chandra) January 1974 (has links)
No description available.
10

Internal pressures in farm silos during bottom unloading : (finite element analysis versus field measurements) /

El-Azazy, Saad S. January 1982 (has links)
No description available.

Page generated in 0.0374 seconds