Relevant bibliographies by topics / Coffee systems

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Academic literature on the topic 'Coffee systems'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Coffee systems"

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Saath, Reni, Fernando Broetto, Marco Antônio Martin Biaggioni, Flávio Meira Borém, Sttela Dellyzete Veiga Franco da Rosa, and José Henrique da Silva Taveira. "Activity of some isoenzymatic systems in stored coffee grains." Ciência e Agrotecnologia 38, no. 1 (February 2014): 15–24. http://dx.doi.org/10.1590/s1413-70542014000100002.

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Considering the worldwide consumption of coffee, it is natural that throughout the history many people have dedicated the research to markers that contribute somehow on gauging its quality. This research aimed to evaluate the biochemical performance of arabica coffee during storage. Coffee in beans (natural) and in parchment (pulped) dried in concrete terrace and in dryer with heated air were packed in jute bags and stored in not controlled environmental conditions. Enzymatic activities of superoxide dismutase, catalase, peroxidase, polyphenoloxidase, esterase and lipoxygenase in coffee grains were evaluated at zero, three, six, nine and twelve months by means of electrophoresis. Independently of the drying method, the activity of isoenzymatic complexes highlighted deteriorative processes in stored grains of coffee. The treatments 60/40º C and 60º C used to reduce the water content imposed a greater stress condition, accelerated metabolism of natural coffee in the storage with decreased activity of defense mechanisms due to latent damage in these grains. Natural coffees are more sensible to high drying temperatures and its quality reduces faster than pulped coffee in the storage.
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Colmenares P., Carlos Hernando, Amanda Silva P., and Ángela María Mogollón O. "Impacts of different coffee systems on soil microbial populations at different altitudes in Villavicencio (Colombia)." Agronomía Colombiana 34, no. 2 (May 1, 2016): 285–91. http://dx.doi.org/10.15446/agron.colomb.v34n2.55420.

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Coffee in Colombia has favorable characteristics for agroforestry practices; farmers traditionally grow coffee under various types of organic coffee systems, mainly dominated by associated systems coffee with shade leguminous tree species, making it one of the essential ecosystems for microorganisms life. This research was developed in the coffee region of Puente Abadia, Villavicencio, Colombia; the objective was to evaluate the heterotrophic aerobic microbial population in Coffea arábica var. Castilla of bacteria (BP), fungi (FP) and actinomycetes (AP), due to the combined effect of three factors. Factor A was related to two bioclimates zones: Low altitude zone <700 m a.s.l. (Z1) and high altitude zone >700 m a.s.l. (Z2); factor B corresponded to two coffee systems: coffee monoculture system (unshaded) (S1), associated coffee system (shaded) (S2) and control treatment of fruit monoculture system (S3). On the other hand, factor C referred to two sampling depth, corresponding to a 0-20 cm depth (D1) and 20-30 cm depth (D2). Significant differences (P≤0.05) between the Z2*S2*D2 factor interaction caused the highest (BP) and (AP); (AP) also was positively influenced by the Z2*S2*D1, Z1*S2*D2 and Z1*S2*D1 interactions (P≤0.05). The (FP) was affected positively by the Z1*S2*D2 and Z1*S2*D1 interactions. The (S2) (shade) had comparative advantages for the soil microbial population, as compared with (S1) and (S3).
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Chatterjee, Nilovna, P. K. Ramachandran Nair, Vimala D. Nair, Abhishek Bhattacharjee, Elias de Melo Virginio Filho, Rheinhold G. Muschler, and Martin R. A. Noponen. "Do Coffee Agroforestry Systems Always Improve Soil Carbon Stocks Deeper in the Soil?—A Case Study from Turrialba, Costa Rica." Forests 11, no. 1 (December 31, 2019): 49. http://dx.doi.org/10.3390/f11010049.

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Shaded perennial agroforestry systems (AFS) are regarded as desirable land-use practices that improve soil carbon sequestration. However, most studies assume a positive correlation between above ground and below ground carbon without considering the effect of past and current land management, textural variations (silt and clay percentage), and such other site-specific factors that have a major influence on the extent of soil C sequestration. We assessed SOC stock at various depths (0–10, 10–30, 30–60, and 60–100 cm) in shaded perennial coffee (Coffea arabica L.) AFS in a 17-year-old experimental field at the Centro Agronómico Tropical de Investigación y Enseñanza, (9°53′44′′ N, 83°40′7′′ W; soil type: Ultisols and Inceptisols, Turrialba, Costa Rica. The treatments included coffee (Coffea arabica L.) grown conventionally (with chemical fertilizers) and organically (without chemical fertilizers) under two shade trees, Erythrina poeppigiana (Walp.) O.F. Cook., and Terminalia Amazonia J.F.Gmel., Sun Coffee (Coffea arabica L.) (Sole stand of coffee without shade), and Native Forest. Three replicated composite soil samples were collected from each system for each depth class, and SOC stocks in three soil aggregate fractions (2000–250 µm, 250–53 µm, and <53 µm) and in the whole soil determined. The total SOC stocks were highest under forest (146.6 Mg C ha−1) and lowest under sun coffee (92.5 Mg C ha−1). No significant differences were noted in SOC stock within coffee AFS and sun coffee across fraction sizes and depth classes. Organic management of coffee under heavily pruned E. poeppigiana, with pruned litter returned to soil, increased SOC stocks for 0–10 cm depth soil only. High input of organic materials including pruned litter did not improve SOC stocks in deeper soil, whereas variations in silt and clay percentages had a significant effect on SOC stocks. The study suggests that high amounts of aboveground biomass alone are not a good indicator of increased SOC storage in AFS, particularly for soils of sites with historical characteristics and management similar to this study.
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Daglia, M., A. Papetti, and G. Gazzani. "Green and roasted coffee antiradical activity stability in chemical systems." Czech Journal of Food Sciences 22, SI - Chem. Reactions in Foods V (January 1, 2004): S191—S194. http://dx.doi.org/10.17221/10658-cjfs.

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The stability to storage at different temperature and oxygen exposure of green and roasted coffee either as coffee beans or as ground coffee antiradical activity, was evaluated. The results showed that the coffee solution antihydroxyl radical activity was constant, independently from the coffee species, from the roasting process, and moreover from the type of storage conditions, suggesting that temperature and oxygen exposure did not affect this antiradical activity. With regard to antiperoxyl radical activity, all green coffee solutions showed remarkable and stable activity. Conversely, the roasted coffee beans and roasted and ground coffee antiperoxyl radical activity started to increase after three month of storage, suggesting that Maillard reaction products affect the stability of such antiradical property.
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Cui, Lei, Katharina Hanika, Richard G. F. Visser, and Yuling Bai. "Improving Pathogen Resistance by Exploiting Plant Susceptibility Genes in Coffee (Coffea spp.)." Agronomy 10, no. 12 (December 8, 2020): 1928. http://dx.doi.org/10.3390/agronomy10121928.

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Coffee (Coffea spp.) is an economically important crop widely cultivated in (sub) tropical countries worldwide. Commercial coffee production relies mainly on two related species, namely C. arabica and C. canephora. Due to their perennial growth habit, cultivation practices, and narrow genetic diversity, coffees are constantly exposed to many diseases and pests. Coffee leaf rust (Hemileia vastatrix Berk. et Br.), coffee berry disease (Colletotrichum kahawae Bridge and Waller), and coffee wilt disease (Gibberella xylarioides Heim and Saccas/Fusarium xylarioides) are the top fungal diseases affecting C. arabica and C. canephora production areas worldwide. In many regions, chemical-based control measures are widely used and are the only way to control the diseases. Developing resistant cultivars is one of the prerequisites for increasing sustainable market demand and agriculture. However, desired and required resistance traits are not always available in the gene pool. Furthermore, from other crops it is clear that dominant resistance genes introduced into varieties are not durable because of pathogen variability and the emergence of new races of the different pathogens. Utilization of altered susceptibility genes (S genes) offers a novel and alternative strategy for the breeding of durable and broad-spectrum resistance. The S gene encodes a host factor that facilitates a compatible interaction with the pathogen, and impairment of S genes leads to loss-of-susceptibility. In this review, guidelines for effective identification, characterization, and utilization of dysfunctional S genes are proposed to aid breeding activities in order to introduce durable resistance in Coffea spp. Several candidate S genes likely contributing to the susceptibility of Colletotrichum spp., Fusarium spp., and Meloidogyne spp. are discussed. With the rapid development of genetic engineering techniques, including CRISPR-associated systems, we now have the potential to accelerate the application of S genes to achieve durable resistance in coffee.
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Piato, Kevin, Cristian Subía, Jimmy Pico, Darío Calderón, Lindsey Norgrove, and François Lefort. "Organic Farming Practices and Shade Trees Reduce Pest Infestations in Robusta Coffee Systems in Amazonia." Life 11, no. 5 (April 30, 2021): 413. http://dx.doi.org/10.3390/life11050413.

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Coffee agroforestry systems could reconcile agricultural and environmental objectives. While pests and diseases can reduce yield, their interactions with shade and nutrition have been rarely researched, and are particularly lacking in perennial systems. We hypothesized that intermediate shade levels could reduce coffee pests while excess shade could favor fungal diseases. We hypothesized that organic rather than mineral fertilization would better synchronize with nutrient uptake and higher nutrient inputs would be associated with reduced pest and disease damage due to higher plant vigor, yet effects would be less obvious in shaded plots as coffee growth would be light-limited. Using three-year-old trees of Coffea canephora var. Robusta (robusta coffee) in the Ecuadorian Amazon, we compared a full-sun system with four shading methods creating different shade levels: (1) Myroxylon balsamum; (2) Inga edulis; (3) Erythrina spp.; or, (4) Erythrina spp. plus Myroxylon balsamum. Conventional farming at either (1) moderate or (2) intensified input and organic farming at (3) low or (4) intensified input were compared in a split-plot design with shade as the main plot factor and farming practice as the sub-plot factor. The infestation of the following pests and disease incidences were evaluated monthly during the dry season: brown twig beetle (Xylosandrus morigerus), coffee leaf miner (Leucoptera coffeella), coffee berry borer (Hypothenemus hampei), anthracnose disease (Colletotrichum spp.), thread blight (Pellicularia koleroga), and cercospora leaf spot (Cercospora coffeicola). Coffee berry borer and brown twig beetle infestation were both reduced by 7% in intensified organic treatments compared to intensified conventional treatments. Colonization of coffee berry borer holes in coffee berries by the entomopathogenic fungus Beauveria bassiana was also assessed. Brown twig beetle infestation was significantly higher under full sun than under Inga edulis, yet no other shade effects were detected. We demonstrate for the first time how intensified input use might promote pest populations and thus ultimately lead to robusta coffee yield losses.
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Bulitta, Bikila Jabessa, and Lalisa A. Duguma. "The Unexplored Socio-Cultural Benefits of Coffee Plants: Implications for the Sustainable Management of Ethiopia’s Coffee Forests." Sustainability 13, no. 7 (April 1, 2021): 3912. http://dx.doi.org/10.3390/su13073912.

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Coffee is among the most popular commodity crops around the globe and supports the livelihoods of millions of households along its value chain. Historically, the broader understanding of the roles of coffee has been limited to its commercial value, which largely is derived from coffee, the drink. This study, using in-depth interviews and focus group discussions, explores some of the unrevealed socio-cultural services of coffee of which many people are not aware. The study was conducted in Gomma district, Jimma Zone, Oromia National Regional state, Ethiopia, where arabica coffee was first discovered in its natural habitat. Relying on a case study approach, our study uses ethnographic study methods whereby results are presented from the communities’ perspectives and the subsequent discussions with the communities on how the community perspectives could help to better manage coffee ecosystems. Coffee’s utilities and symbolic functions are numerous—food and drink, commodity crop, religious object, communication medium, heritage and inheritance. Most of the socio-cultural services are not widely known, and hence are not part of the benefits accounting of coffee systems. Understanding and including such socio-cultural benefits into the wider benefits of coffee systems could help in promoting improved management of the Ethiopian coffee forests that are the natural gene pools of this highly valuable crop.
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DaMatta, Fábio M., Cláudio P. Ronchi, Moacyr Maestri, and Raimundo S. Barros. "Ecophysiology of coffee growth and production." Brazilian Journal of Plant Physiology 19, no. 4 (December 2007): 485–510. http://dx.doi.org/10.1590/s1677-04202007000400014.

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After oil, coffee is the most valuable traded commodity worldwide. In this review we highlighted some aspects of coffee growth and development in addition to focusing our attention on recent advances on the (eco)physiology of production in both Coffea arabica and C. canephora, which together account for 99% of the world coffee bean production. This review is organized into sections dealing with (i) climatic factors and environmental requirements, (ii) root and shoot growth, (iii) blossoming synchronisation, fruiting and cup quality, (iv) competition between vegetative and reproductive growth and branch die-back, (v) photosynthesis and crop yield, (vi) physiological components of crop yield, (vii) shading and agroforestry systems, and (viii) high-density plantings.
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de Resende, Mário L. V., Edson A. Pozza, Tharyn Reichel, and Deila M. S. Botelho. "Strategies for Coffee Leaf Rust Management in Organic Crop Systems." Agronomy 11, no. 9 (September 17, 2021): 1865. http://dx.doi.org/10.3390/agronomy11091865.

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Coffee is a crop of great economic importance in many countries. The organic coffee crop stands out from other production systems by aiming to eliminate the use of synthetic fertilizers and pesticides. One of the most important limitations in the organic system is the management of diseases, especially coffee rust, which is considered the main disease of this crop. Coffee rust causes a production slump of up to 50%, significantly affecting the profitability of coffee growers. This work aims to review the integrated rust management in organic coffee crop in different producing countries. Regarding the disease management strategies, this review addresses the use of rust-resistant cultivars, cultural management, biological control, use of plant extracts, and chemical rust control by cupric fungicides. Considering the importance of the organic system, the increase in world coffee consumption, and the potential market for this kind of coffee, this review may help researchers and producers looking for alternative strategies to control rust in an organic coffee cultivation system.
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Acosta-Alba, Ivonne, Joachim Boissy, Eduardo Chia, and Nadine Andrieu. "Integrating diversity of smallholder coffee cropping systems in environmental analysis." International Journal of Life Cycle Assessment 25, no. 2 (October 24, 2019): 252–66. http://dx.doi.org/10.1007/s11367-019-01689-5.

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Abstract Purpose Coffee represents an important trade asset internationally. Around 70% of global coffee production is provided by 25 million smallholders farmers. In recent decades, coffee systems have been transformed into more intensified systems of coffee monoculture. The general objectives of this paper are to provide a better picture of the traditional coffee cropping systems and postharvest processes on-farm and to assess the environmental impacts, integrating the diversity of smallholder cropping systems. Methods A Life Cycle Assessment from cradle to farm gate was performed for three cropping systems representative of Colombian coffee cultivation according to the associated crops and shadow trees: coffee alone (CA), coffee with transition shade (CTS), and coffee with permanent shade (CPS). The system studied includes inputs, agricultural production and postharvest operations using the wet method. The final product of farms is parchment bean coffee at farm gate. The technology used is representative of the average practices of smallholder coffee growers in the region. To address multiple functions of coffee, three functional units (FU) were selected: area by time (ha*year−1 unit area), productivity (ton of parchment coffee) and farmers income (1000 USD$). Seven midpoint categories were selected: climate change, acidification, terrestrial eutrophication, freshwater eutrophication, marine eutrophication, freshwater ecotoxicity, and water resource depletion. Results and discussion We present the life cycle inventory and impact assessment results from three types of cropping systems CA, CTS and CPS. For all FU, the CPS system has the lowest potential impact, excepted for marine eutrophication. CPS also has the highest coffee yields, however it has also the highest costs. Even if cropping system diversification is only one of multiple factors that influence environmental performance, agroforestry seems to be a promising path to reduce and mitigate environmental impacts by decreasing off-fam contributions (input fabrication). Conclusions Results show the possibility that diversified cropping systems have an influence when assessing potential environmental impacts of coffee at farm gate and differences found might be influenced by shading in traditional coffee systems. Future work is needed to consider the real potential of CTS cropping system including land use and carbon dynamics. Assessments including social indicators and the rest of the value chain in particular coffee industrial transformation and utilization are also needed since the consumption stages are also a key driver to reduce the environmental footprint of coffee.
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Dissertations / Theses on the topic "Coffee systems"

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Xu, Su. "Impact of agro-forestry systems on coffee yield, coffee plant morphology, physical and chemical attributes of green coffee beans and aroma generation of roasted coffee beans." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/48086/.

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A long experiment has been established since 2000 at CATIE (Tropical Agricultural Research and Higher Education Center), Turrialba, Costa Rica. Twenty agro-forestry systems with different shade types and managements (organic and non-organic) consisting of an incomplete randomized block-design with shade tree as main effect and subplots represented by management were set up. The mean 13-year yield, bienniality index (BI) of coffee yield, pruning, shade cover and morphology (height, diameter, total branches and productive branches) of coffee plants in these agro-forestry systems were measured. The effects of different managements and shade types on the physical and chemical attributes of green coffee beans and aroma and colour generation of roasted coffee beans were investigated. The organic management always showed the more stable production, while the coffee yield and morphology were always worse under the intensive organic (IO) management than under the intensive conventional (IC) management. Comparing with the moderate conventional (MC) management, the intensive organic (IO) management did not only have a similar or even higher productivity, but it also had higher total lipid and protein in the green beans and a stronger ability to generate more flavour and colour. The full sun system had a higher total coffee yield and bienniality index (BI) of coffee yield, green bean density and total protein content and greater flavour generation and colour after roasting. Comparing with the timber system, the service system did not only have the higher coffee yield and better coffee plant morphology, but it also produced green beans with higher total protein and roasted beans with the more flavour and colour. Comparing with the non-legume shade tree, the legume shade tree only influenced the total protein content of green coffee beans and further improved the performance of flavour and colour in the roasted coffee beans.
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Ingvarsson, Josef. "Assessing Sustainability in Coffee Farming Systems in Colombia." Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-45478.

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This study investigated sustainability challenges and benefits for coffee farming with different amounts of shade management in Colombia. Data was collected from literature studies, quantitative soil analyses and interviews with farmers and other experts. The results show that shade management of coffee farms does increase ecological sustainability, but in general gives lower yields of coffee. However, shaded coffee systems have the potential of increasing economic resilience for farmers by providing diversified income possibilities. The low and fluctuating coffee price of the global market has shown to be a major challenge of sustainability for Colombian small scale coffee farms. In addition a participatory sustainability assessment of soil quality and crop health was conducted with four farmers. The results from these assessments were compared with results from quantitative analyses of soil compaction, microbiological respiration rate and organic matter content in order to evaluate the analytical reliability of the assessment. The results of the participatory assessment were shown to correlate quite well to the quantitative soil analyses. When participatory methodology was evaluated from experiences in field and literature, it was found to be an important approach in facilitating sustainability learning in local contexts.
En esta investigación se examinaron los retos y beneficios de la sostenibilidad en la producción del cultivo de café con diferentes niveles de sombra en Colombia. Los datos se colectaron de estudios de literatura, análisis de suelo y entrevistas con agricultores y expertos en el tema. Los resultados indican que el manejo con sombra incrementa la sostenibilidad ecologica de las fincas cafeteras, y esto, tiene la posibilidad de incrementar la resiliencia económica para los agricultores al ofrecer oportunidades para una producción diversificada de ingresos. El precio bajo y fluctuante del café en el mercado mundial ha demostrado ser un importante reto para la sostenibilidad de las fincas de los campesinos colombianos. Además, se realizó una evaluación de la sostenibilidad participativa de la calidad del suelo y la salud de los cultivos con cuatro agricultores. Los resultados de esta evaluación se compararon con los resultados de análisis cuantitativos: de la compactación del suelo, la tasa de respiración microbiológica y contenido de materia orgánica, con el fin de evaluar la fiabilidad analítica de la evaluación participativa. Se demostró que los resultados de la evaluación participativa tienen una estrecha relación con el análisis cuantitativo del suelo. Cuando la metodología participativa se evaluó a partir de las experiencias propias en el campo y la literatura, se encontró que puede ser un enfoque importante para facilitar el aprendizaje de sostenibilidad para los contextos locales.
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De, Meij Garcia-Montoya Luisa Fernanda. "Systematic narratives : a study of an information system for the Colombian coffee industry." Thesis, University of Lincoln, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387701.

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Harding, Paul Ernest. "A comparison of the nitrogen requirements of two coffee (Coffea aribica L.) management systems in Papua New Guinea." Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385179.

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Gomes, Lucas de Carvalho. "Soil CO2 Efflux in Agroforestry and Full-Sun Coffee Systems." Universidade Federal de Viçosa, 2014. http://www.locus.ufv.br/handle/123456789/6469.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
A mudança climática global tem sido atribuída ao aumento da concentração de gases de efeito estufa na atmosfera, especialmente o dióxido de carbono (CO2), como resultado das atividades humanas. Para atenuar esse efeito, existe um esforço global em reduzir as emissões de CO2 e desenvolver tecnologias para remover parte desse gás da atmosfera. A maneira mais simples e natural para remover o CO2 da atmosfera é realizada pelas plantas através da fotossíntese. Este processo remove o carbono da atmosfera formando biomassa vegetal, a qual mais tarde será depositada no solo, maior reservatório de carbono (2500 GtC) na biosfera terrestre. O balanço de carbono no solo é resultado da deposição de biomassa vegetal e perda de carbono, especialmente como CO2. Portanto, o solo, no ciclo global do carbono, pode atuar como fonte ou dreno de carbono da atmosfera. Para melhor compreensão do papel do solo no ciclo do carbono não é suficiente conhecer apenas a quantidade de carbono que determinadas espécies de plantas depositam no solo, mas também como esse carbono é liberado de volta para a atmosfera. O CO2 é liberado (efluxo de CO2 do solo) a partir de respiração do solo, a maior fonte de CO2 da biosfera terrestre. O efluxo de CO2 do solo é um processo complexo que depende das características biológicas e físicas do solo, especialmente das condições de temperatura e umidade do solo. No entanto, o tipo de vegetação e as práticas agrícolas podem ser os principais componentes que controlam o efluxo de CO2 do solo em agroecossistemas, porque influenciam as características biológicas e físicas do solo e regulam as condições de temperatura e umidade do solo. Nos sistemas agroflorestais as árvores aportam matéria orgânica no solo e o protegem contra a radiação solar direta, influenciando assim o efluxo de CO2 do solo. O objetivo geral deste estudo foi compreender como a copa das árvores, em sistemas agroflorestais com café, afetam o efluxo de CO2 do solo e quais os fatores controladores deste processo em comparação com café a pleno sol. Para isso avaliou-se o efluxo de CO2 do solo (in situ), em sistemas agroflorestais com café e em sistemas com café a pleno sol em três propriedades de agricultores familiares na Zona da Mata de Minas Gerais, Brasil. O aumento nos níveis de cobertura da copa das árvores resultou no aumento da umidade do solo e na diminuição da temperatura do ar e do solo a 5 e 10 cm de profundidade. O efeito das árvores no microclima não afetou a média diária de efluxo de CO2 do solo entre os sistemas agroflorestais e a pleno sol, mas contribuiu para que a dinâmica das emissões diárias fosse diferente entre os sistemas. No sistema agroflorestal o efluxo de CO2 do solo foi mais estável durante o dia com menor variação entre o período de 08:00-10:00h e 12:00-14:00h e maior variação espacial do que no sistema a pleno sol. No sistema agroflorestal o efluxo de CO2 foi explicado principalmente por variações na quantidade de nitrogênio total e carbono lábil e no sistema a pleno solo pela temperatura do solo, especialmente a 10 cm de profundidade. A análise de componetes principais mostrou que em geral o efluxo de CO2 do solo correlacionou positivamente com a temperatura do solo a 5 e 10 cm de profundidade e negativamente com a umidade do solo. Em conclusão, as árvores em sistemas agroflorestais de café trouxeram maior estabilidade para o microclima e para o efluxo de CO2 do solo comparado com sistemas a pleno sol.
The global climate change has been attributed to increasing greenhouse gas concentration, especially Carbon Dioxide (CO2) in atmosphere as result of human activities. To mitigate this effect, there is a global effort to reduce CO2 emissions and develop technologies to remove part of this gas from the atmosphere. The most simple and natural way to remove CO2 from atmosphere is carried out by plants through photosynthesis. This process removes carbon from atmosphere creating vegetal biomass, which later will be deposited in soil, the biggest reservoir of carbon in the terrestrial biosphere (2500 GtC). The balance of carbon in the soil is the result of input of vegetal biomass and the output of carbon, especially as CO2. Therefore, the soil, in the Global Carbon Cycle, acts either as source or as a sink of carbon from the atmosphere. To better understand the role of soil in Carbon Cycle and to it become sink of CO2 it is not enough to know the carbon that particular plant species can deposit in the soil, but also how this carbon is released back to atmosphere. The CO2 is released from soil (also called soil CO2 efflux) mainly from soil respiration, which is the biggest source of CO2 from terrestrial biosphere. Soil CO2 efflux is a complex process that depends on the soil biological and physical characteristics and especially on the soil temperature and moisture conditions. However, the vegetation type and the agricultural practices may be the main components to control the soil CO2 efflux in agroecosystems, because they influence the soil biological and physical characteristics and control the soil temperature and moisture conditions. Agroforestry coffee management increases the amount of organic matter residue and the canopy’s trees protect the soil against the directly solar radiation, thus, affecting the soil CO2 efflux. The general objective of this study it was to understand how the canopy’s trees in agroforestry and full-sun coffee systems affect the soil CO2 efflux and which factors control it. To this end we evaluated the soil CO2 efflux (in situ) in agroforestry and full-sun coffee systems in three different farms in Zona da Mata of Minas Gerais, Brazil. The increase in canopy cover levels from trees leads to increase soil moisture and decrease air and soil temperature at 5 and 10 cm depth. The effect of trees on microclimate did not affect the daily average of soil CO2 efflux between agroforestry and full-sun coffee systems, but they showed different daily emission dynamics. In agroforestry system the soil CO2 efflux was more stable during the day, presenting less variation from morning to midday and higher spatial variation than the full-sun system. In agroforestry system the variation of soil CO2 efflux was explained mainly by total nitrogen and labile carbon and in full- sun system by soil temperature at 10 cm depth. The principal components analysis shows that in general the soil CO2 efflux was positively correlated with soil temperature at 5 and 10 cm depths and negatively correlated with soil moisture. In conclusion, the trees in agroforestry coffee systems promoted stability to microclimate and soil CO2 efflux compared to Full-Sun systems.
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Muleta, Diriba. "Microbial inputs in coffee (Coffea arabica L.) production systems, southwestern Ethiopia : implications for promotion of biofertilizers and biocontrol agents /." Uppsala : Dept. of Microbiology, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/2007117.pdf.

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Bezabeh, Tesfay Gidey. "Using yield-SAFE model to assess climate change impact on yield of coffee (Coffea arabica) under agroforestry and monoculture systems." Master's thesis, ISA-UL, 2016. http://hdl.handle.net/10400.5/13004.

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Mestrado Mediterranean Forestry and Natural Resources Management (MEDFOR) - Instituto Superior de Agronomia - UL
Ethiopia economy strongly depends on coffee (Coffea arabica L.) production. Coffee, like many other agricultural crops, is sensitive to climate change. Future changes in climate will have a negative impact on coffee yield and quality. Studies have called for an urgent development of coffee’s adaptation strategies against climate change and agroforestry systems have received attention as an adaptation and mitigation strategy for coffee production under future climate. This study contributes to the assessment of coffee production in 1) monoculture and in 2) agroforestry systems, under different climate scenarios, in four different regions, providing insights for preliminary recommendations for coffee growers and policy makers. The Yield-SAFE processbased model was used to predict yield of coffee in monoculture and under agroforestry systems for forty years of current and future climate (Representative Concentration Pathways (RCP) 4.5 and 8.5 - HadCM2 model). In monoculture system, coffee yield was estimated to decrease between 4-38 % and 16-58 % in RCP 4.5 and 8.5, respectively from its current yield of 1000-1600 kg ha-1 yr-1. However, in agroforestry system the decrease was between 4-13 % and 13-25 % in RCP 4.5 and 8.5, respectively from its current yield of 1200-2200 kg ha-1 yr-1, showing that agroforestry systems have a higher resilience when facing future climate change.
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Gebreeyesus, Kinfe Asayehegn. "Impact of climate change on the agro-ecological innovation of coffee agroforestery systems in central Kenya." Thesis, Montpellier, SupAgro, 2017. http://www.theses.fr/2017NSAM0010/document.

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Le changement climatique et la variabilité ont des répercussions graves dans le secteur agricole des régions tropicales. Le secteur du café est sensible au changement climatique car il nécessite une température relativement froide et une plus grande durée des pluies. L'adaptation au changement climatique dans l'agroforesterie du café est donc importante pour traiter les impacts, mais il existe des obstacles et des limites. Le but de cette thèse était d'analyser les stratégies d'adaptation au changement climatique au centre du Kenya. Nous avons étudié différentes étapes de l'adaptation qui incluent (1) les connaissances sur le changement climatique et l'adaptation, la motivation à l'adaptation, (2) le choix actuel des stratégies d'adaptation et leurs déterminants, (3) les rôles du système d'innovation et du contexte institutionnel. Cette étude repose sur quatre sources d'information: - (1) groupes de discussion sur des questionnaires pré-définis, (2) enquêtes auprès des ménages, (3) entrevues auprès des intervenants et (4) données climatiques historiques sur le contexte de quatre types de systèmes de productions dans l’agriculture : les cultures vivrières, le café spécialisé, les systèmes diversifiés café-laiterie et les systèmes laitiers spécialisés, dans les zones caféières et vivrières. L'analyse des tendances de Mann-Kendal et l'estimateur de la pente de Sen ont été utilisées pour comparer les connaissances des agriculteurs sur les changements climatiques et l’historique des données climatiques, tandis que le modèle de Heckman a été utilisé pour analyser les stratégies d'adaptation et leurs déterminants. Les résultats soulignent des cohérences entre les connaissances des agriculteurs et l'analyse historique des données pour la température mais des incohérences avec le changement des précipitations. L'analyse de la perception par les agriculteurs révèle que les précipitations diminuent radicalement au fil du temps, alors qu'aucun élément de preuve concernant les précipitations ne permet d'appuyer la perception des agriculteurs. L'incohérence est donc corroborée par l'analyse des modèles. Les agriculteurs du secteur du café et des cultures vivrières se sont adaptés différemment aux changements climatiques. Les agriculteurs qui sont conscients des changements sont plus disposés à explorer les stratégies d'adaptation. Une partie des agriculteurs qui ne perçoivent pas le changement climatique adoptent des stratégies d’adaptation à des facteurs autres. L'adaptation au changement climatique est également déterminée par la performance institutionnelle et les différences de systèmes sectoriels d'innovation. La comparaison entre les secteurs du café et des produits laitiers révèle ainsi que les stratégies des acteurs du café sont limitées. En ce qui concerne l’élaboration des politiques, cette thèse contribue aux politiques d’accompagnement de l’adaptation au niveau des ménages, aux politiques de recherche agronomique et de négociation des accords internationaux. Les recommandations politiques au niveau des ménages se différentient selon trois scénarios. En premier lieu de l’intensification dans le café par l’innovation technologique. Les deux autres options politiques sont dans la diversification sectorielle dans la production laitière qui dépend de leur niveau de rentabilité. Les résultats de cette étude sont issus d’enquêtes sur l’analyse des systèmes d’innovation. D’autres options politiques sont proposées dans le développement de nouvelles infrastructures, des subventions pour accroitre les potentiels d’adaptation. Nous recommandons enfin de nouveaux sujets de recherche pour le futur
Climate change and variability is the most widespread anthropogenic challenge affecting agricultural production and productivity particularly in the tropics. Coffee sector is sensitive to climate change as it requires relatively cold temperature and higher rainfall duration. Adaptation to climate change in the coffee agroforestry is, therefore, important to address the impacts, but there are barriers, and limits. The aim of this Thesis was to analyze the adaptation strategies to climate change in Central Kenya. We studied the steps in adaptation, which includes (1) the knowledge on climate change and adaptation, the motivation towards adaptation, (2) current choices of households’ adaptation strategies, and their determinants, (3) the roles of innovation system and institutional context to support adaptation. This study was based on four sources of information: - (1) Focus Group Discussions to predefine the questionnaires, (2) household surveys, (3) stakeholders interview, and, (4) historical climate data. The data collection considered four farming typologies; - food crops, specialized coffee, diversified coffee-dairy and specialized dairy farming systems in the coffee and food crops zones. Mann-Kendal trend analysis and Sen’s slope estimator were used to compare the farmers’ knowledge of climate change with the historical climate data, while Heckman model was used to analyze adaptation strategies and their determinants. The findings explore consistent results between farmers’ knowledge and historical data analysis for temperature, while inconsistency is observed in rainfall change. Analysis of farmers’ perception revealed rainfall is radically declining over time, while no evidence in rainfall record is found to support the farmers’ perception. The inconsistency is therefore, substantiated with analysis of patterns. Coffee and food crop farmers are found to adapt to climate change differently. Farmers who are aware of the changes are found more willing to explore adaptation strategies although some of the farmers who do not perceive the climate is changing are also adopting strategies for factors other than perception. The comparison between coffee and dairy sectors found that actors in the coffee are limited, the system is highly centralized with limited options for farmers to process and market their products, while the dairy sector is informally controlled by demand based business and comparatively, numerous actors. We conclude in this study that the patterns in rainfall affects the farming activities of the study area higher than the annual changes. Consequently, farmers adopt a series of adaptation strategies in response to their perception of changes in climate and economic pressure in the farm. This adaptation to climate change also depends on the nature of actors’ interaction and institutional context. In relation to policy development, this Thesis contributes to household level adaptation policies, research policies and international agreements and negotiations. The household level policy recommendations consists of three scenarios. Farmers’ intensification in coffee applying the right technological innovations. The second and third policy options are the diversification to dairy and complete sectoral transformation to dairy depending on the profitability and adaptation level of the sectors. The results in this study are derived from surveys and analysis of innovation systems. Other strategies such as new infrastructural development and institutional subsidies could be potential for adaptation. We therefore, recommend, these could be potential future research topics
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Lenz, Anthony M. "COFFEE: Context Observer For Fast Enthralling Entertainment." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1244.

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Desktops, laptops, smartphones, tablets, and the Kinect, oh my! With so many devices available to the average consumer, the limitations and pitfalls of each interface are becoming more apparent. Swimming in devices, users often have to stop and think about how to interact with each device to accomplish the current tasks at hand. The goal of this thesis is to minimize user cognitive effort in handling multiple devices by creating a context aware hybrid interface. The context aware system will be explored through the hybridization of gesture and touch interfaces using a multi-touch coffee table and the next-generation Microsoft Kinect. Coupling gesture and touch interfaces creates a novel multimodal interface that can leverage the benefits of both gestures and touch. The hybrid interface is able to utilize the more intuitive and dynamic use of gestures, while maintaining the precision of a tactile touch interface. Joining these two interfaces in an intuitive and context aware way will open up a new avenue for design and innovation.
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Reeka, Robinson. "Challenges Associated with the Use of Mobile Phones Among Ugandan Coffee Farmers." Thesis, Örebro universitet, Handelshögskolan vid Örebro Universitet, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-67293.

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Books on the topic "Coffee systems"

1

IACO, Workshop (1995 Kampala Uganda). Improving coffee management systems in Africa: Proceedings of IACO Workshop, Kampala, Uganda, 4-6 September, 1995. Kampala, Uganda: African Crop Science Society, Makerere University, 1996.

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Gebre-Egziabher, Tegegne. Rural-urban linkages under different farming systems: The cases of coffee and non-coffee growing regions in Ethiopia. Addis Ababa, Ethiopia: Organization for Social Science Research in Eastern and Southern, 2001.

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Suremain, Charles-Edouard de. Jours ordinaires à la finca: Une grande plantation de café au Guatemala. Paris: Editions de l'ORSTOM, 1996.

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Schmitt, Christine B. Montane rainforest with wild Coffea arabica in the Bonga region (SW Ethiopia): Plant diversity, wild coffee management and implications for conservation. Göttingen: Cuvillier, 2006.

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Kanten, Rudolf F. van. Competitive interactions in agroforestry systems: Competitive interactions between Coffea arabica L. and fast-growing timber shade trees in southern Costa Rica. Eschborn: Deutsche Gesellschaft für Technische Zusammenarbeit, 2003.

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Wakjira, Feyera Senbeta. Biodiversity and ecology of Afromontane rainforests with wild Coffea arabica L. populations in Ethiopia. Göttingen: Cuvillier Verlag, 2006.

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Acción y discurso: Alternativas de comunicación en la red de Internet por parte de los productores de café orgánico en México. Ciudad Juárez: Universidad Autónoma de Ciudad Juárez, 2011.

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O'Connor, Niall. Constraints and solutions to small scale tree nursery management in the coffee based land-use systems of Murang'a District, Central Highlands, Kenya. Dublin: University College Dublin, 1997.

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Akiyama, T. Impact of the International Coffee Agreement's export quota system on the world's coffee market. Washington, DC (1818 H St. NW, Washington DC 20433): International Economic Dept., World Bank, 1989.

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Eastland, Sam. The red coffin. London: Faber and Faber, 2011.

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Book chapters on the topic "Coffee systems"

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Marbán-Mendoza, Nahum. "Nematodes Management In Coffee Production Systems." In Integrated Management of Fruit Crops Nematodes, 101–18. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-1-4020-9858-1_4.

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Gómez, Nychol Bazurto, Carlos Alberto Martínez Morales, and Helbert Espitia Cuchango. "Fuzzy Model Proposal for the Coffee Berry Borer Expansion at Colombian Coffee Fields." In Advances in Intelligent Systems and Computing, 247–52. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-01568-2_35.

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Cortez, J. G., and H. C. Menezez. "Recent Developments in Brazilian Coffee Quality: New Processing Systems, Beverage Characteristics and Consumer Preferences." In Coffee Biotechnology and Quality, 339–46. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-017-1068-8_31.

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Lin, Yi-Ciao, and Chien-Hsu Chen. "Behind the Chain Coffee Shop: Design of Utilizing Virtual Reality for Coffee-Making Training." In Lecture Notes in Networks and Systems, 204–10. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80091-8_24.

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Tukker, Arnold. "Sustainable Consumption by Certification: The Case of Coffee." In Sustainable Production Consumption Systems, 179–99. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-3090-0_10.

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Cristancho, Marco, William Giraldo, David Botero, Javier Tabima, Diana Ortiz, Alejandro Peralta, Álvaro Gaitán, Silvia Restrepo, and Diego Riaño. "Application of Genome Studies of Coffee Rust." In Advances in Intelligent Systems and Computing, 133–39. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-01568-2_20.

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Bertel-Paternina, Luis, Luis F. Castillo, Alvaro Gaitán-Bustamente, Narmer Galeano-Vanegas, and Gustavo Isaza. "Search Functional Annotations Genetic Relationships of Coffee through Bio2RDF." In Advances in Intelligent Systems and Computing, 45–51. Heidelberg: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00578-2_7.

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Lozada, Gersain, Geraldin Valencia, Emmanuel Lasso, and Juan Carlos Corrales. "Coffee Rust Detection Based on a Graph Similarity Approach." In Advances in Intelligent Systems and Computing, 82–96. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-70187-5_7.

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Varela-Aldás, José, Esteban M. Fuentes, Jorge Buele, Raúl Grau Meló, José Manuel Barat, and Miguel Alcañiz. "Support Vector Machine as Tool for Classifying Coffee Beverages." In Advances in Intelligent Systems and Computing, 275–84. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-40690-5_27.

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Linne, Kerstin. "VSS and Climate Change in the Coffee Sector: The 4C Climate Module." In Voluntary Standard Systems, 305–14. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-35716-9_21.

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Conference papers on the topic "Coffee systems"

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Tuan, Nguyen Ha Anh, Ha Tuan Cuong, Nguyen Hoang Dung, Le Sy Vinh, and Tu Minh Phuong. "EM-Coffee: An Improvement of M-Coffee." In 2010 Second International Conference on Knowledge and Systems Engineering (KSE). IEEE, 2010. http://dx.doi.org/10.1109/kse.2010.16.

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Tonelli, Annachiara, David Mosna, and Giuseppe Vignali. "Comparative Life Cycle Assessment of different packaging systems for coffee capsules." In the 4th International Food Operations and Processing Simulation Workshop. CAL-TEK srl, 2018. http://dx.doi.org/10.46354/i3m.2018.foodops.001.

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"The aim of this work is to compare the environmental impact of three different packaging systems for coffee capsules, which can be used in the same coffee machine. A comparative Life Cycle Assessment has been performed considering the following three types of coffee capsules: 1. Compostable coffee capsules packaged into a multichamber PET tray. 2. Capsules made of aluminium and packaged into cardboard boxes. 3. Capsules made of polypropylene with an aluminium top lid, singularly packaged in modified atmosphere into a bag made of multilayer film of aluminium and polypropylene. The functional unit considered is a coffee capsule. To evaluate the environmental impact, the EPD (Environmental Product Declaration) method is used. This work shows that it is possible to reduce the environmental impact of compostable capsules packaged in PET tray by two ways: by using a less polluting starch polymer and by producing biogas instead of compost from the organic waste. With these improvements, the compostable coffee capsule in PET tray results the less damaging packaging system for all categories except than for the ozone layer depletion and the fossil fuels depletion."
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Fallatah, Abrar, Bohkyung Chun, Sogol Balali, and Heather Knight. ""Would You Please Buy Me a Coffee?"." In DIS '20: Designing Interactive Systems Conference 2020. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3357236.3395446.

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"Conference rooms, registration and coffee break." In The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. IEEE, 2004. http://dx.doi.org/10.1109/mwscas.2004.1354072.

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Leshed, Gilly, Liza Mansbach, and Michael Huang. "Designing for Transparency of Coffee Production Costs." In CHI '18: CHI Conference on Human Factors in Computing Systems. New York, NY, USA: ACM, 2018. http://dx.doi.org/10.1145/3170427.3188508.

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Casado-Mansilla, Diego, Juan Lopez-de-Armentia, Pablo Garaizar, and Diego López-de-Ipiña. "To switch off the coffee-maker or not." In CHI '14: CHI Conference on Human Factors in Computing Systems. New York, NY, USA: ACM, 2014. http://dx.doi.org/10.1145/2559206.2581152.

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Wella, Wella, Rangga Winantyo, Benyamin Pratama, Adhi Kusnadi, Reza Bagus Hidayat, and Agung Surya Thidar. "Is Startup Business on Coffee Usable with Mobile Application?" In 2018 Joint 10th International Conference on Soft Computing and Intelligent Systems (SCIS) and 19th International Symposium on Advanced Intelligent Systems (ISIS). IEEE, 2018. http://dx.doi.org/10.1109/scis-isis.2018.00199.

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Kumar, Manoj, Pranav Gupta, Puneet Madhav, and Sachin. "Disease Detection in Coffee Plants Using Convolutional Neural Network." In 2020 5th International Conference on Communication and Electronics Systems (ICCES). IEEE, 2020. http://dx.doi.org/10.1109/icces48766.2020.9138000.

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Taib Miskon, Mohamad, Mohd Hezri Fazalul Rahiman, and Mohd Nasir Taib. "Modelling of Sabahan Coffee Bean Roasting Process using Optimized FOPDT Function." In 2020 IEEE 8th Conference on Systems, Process and Control (ICSPC). IEEE, 2020. http://dx.doi.org/10.1109/icspc50992.2020.9305807.

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Taib Miskon, Mohamad, Mohd Hezri Fazalul Rahiman, and Mohd Nasir Taib. "Modelling of Sabahan Coffee Bean Roasting Process using Optimized FOPDT Function." In 2020 IEEE 8th Conference on Systems, Process and Control (ICSPC). IEEE, 2020. http://dx.doi.org/10.1109/icspc50992.2020.9305807.

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Reports on the topic "Coffee systems"

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Campos, Irene. MAPPING OF THE INFORMATION FLOW OF THE VALLE OCCIDENTAL COFFEE REGION: A SYSTEM-OF-SYSTEMS PERSPECTIVE. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317289.

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