20 resultados para Silicon in agriculture

em Deakin Research Online - Australia


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Social capital helps communities respond positively to change. Research in agricultural businesses and into managing change through learning in communities has highlighted the importance of relationships between people and the formal and informal infrastructure of communities to the quality of outcomes experienced by communities, businesses and individuals. Communities can be geographic communities - the data drawn on in this paper are from an island community, for example or communities-of-common-purpose, such as agricultural organisations. This paper reviews research into managing change through learning and social capital, presents a model of the simultaneous building and use of social capital and explores the ways in which learning as part of an agricultural community can be used to bring benefits to geographic communities such as islands. The model presented in this paper stems from studies of the informal learning process that builds resilient communities. It conceptualises the way in which social capital is used and built in interactions between individuals. There are two stages to the model. The first stage depicts social capital at the micro level of one-on-one interactions where it is built and used. The second stage of the model is about the interrelationship of micro-level social capital processes with the community and societal-level social capital resources.

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When I was in high school, it was always talked up that women could do science, engineering and technical [work] too. While we are just as capable as men, when we get into these industries, we face other challenges. There have been brave women who have done their bit to overcome these challenges, but it also requires brave men to challenge the attitudes of these industries to women participating in their workplaces. (APESMA, 2010) Silicon: Elemental silicon has a large impact on the modern world economy ... Because of wide use of silicon in integrated circuits, the basis of most computers, a great deal of modern technology depends on it. (Wikipedia, 2011) The chapter begins with a historical and current analysis of female participation in the workforce, in education and in leadership. The second section focuses on the information and communication technology (ICT) workforce in particular. The third section presents findings from a recent case study that gathered both quantitative and qualitative data from a diverse group of professional women in ICT. The case study provides a view into the ICT profession from the female perspective and identifies a selection of factors that would make a significant difference to female participation and longevity in the profession. The conclusion reached after this investigation is that the silicon ceiling is certainly not visible, yet remains fixed due to nonessential job characteristics that persist in the industry. The future looks bleak unless more female managers and male champions ensure that these nonessential employment characteristics are removed from ICT positions.

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Water reuse has become an integral element of the "total water resources planning and management" along with the other elements such as water conservation, water use efficiency and management of the allocation of existing water sources. Researchers are working actively on the following aspects of water reuse: identification and characterization of different wastewaters that could be reclaimed, development of treatment technologies and effluent standards, quantification of potential gains due to recycling and risk management. The wastewaters that can be reclaimed are domestic and industrial wastewaters, grey water, black water, stormwater and rain water and their potential reuse lies in agriculture, aquaculture, industries, non-potable use in residential and community fronts and indirect and direct potable use. The treatment of wastewater ranges from secondary treatment to advanced treatment, which produces different "Classes" of reclaimed water. This paper evaluates the current status of the research on the above-mentioned important aspects of water reuse with relevant case studies and the future demand for reuse water. The direction in which the future-reuse schemes should be formulated so that they are safe, environmentally sustainable and cost effective are also discussed.

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Farmers need information at all stages of the farming life cycle to make optimal decisions. The required information includes not only prior knowledge but also real time (dynamic) information such as market prices and current production levels. Some valuable information needed by the farmers is produced by government organizations and is available in different locations in different formats. Although farmer is the most important stakeholder in agriculture, there has not been much effort to provide the essential information to farmers on a real time basis. This lack of information is creating many difficulties for farmers as they are not being able to make the correct decisions relating to their farming activities. Through field studies we have identified information required by farmers at various stages of the farming cycle and official sources where this information is available. Next we developed an information flow model that connects various information sources to farmers’ information needs. Based on these findings we are now developing a mobile phone based information system to deliver the required information to farmers in real time.

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Potassium phosphonate (phosphite) is widely used in the management of Phytophthora diseases in agriculture, horticulture and natural environments. The Austral grass tree, Xanthorrhoea australis, a keystone species in the dry sclerophyll forests of southern Australia, is susceptible to Phytophthora cinnamomi, but is protected by applications of phosphite. We examined the effect of phosphite application on the infection of X. australis seedlings and cell suspension cultures by zoospores of P. cinnamomi. Phosphite induced more intense cellular responses to pathogen challenge and suppressed pathogen ingress in both seedlings and cell cultures. In untreated X. australis seedlings, hyphal growth was initially intercellular, became intracellular 24 h after inoculation, and by 48 h had progressed into the vascular tissue. In phosphite-treated seedlings, growth of P. cinnamomi remained intercellular and was limited to the cortex, even at 72 h after inoculation. The cell membrane retracted from the cell wall and phenolic compounds and electron dense substances were deposited around the wall of infected and neighbouring cells. Suspension cells were infected within 6 h of inoculation. Within 24 h of inoculation, untreated cells were fully colonised, had collapsed cytoplasm and died. The protoplast of phosphite-treated suspension cells collapsed within 12 h of inoculation, and phenolic material accumulated in adjacent, uninfected cells. No anatomical response to phosphite treatment was observed before infection of plant tissues, suggesting that the phosphite-associated host defence response is induced following pathogen challenge. Anatomical changes provide evidence that phosphite stimulates the host defence system to respond more effectively to pathogen invasion.

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Although metal dithiocarbamate complexes have been studied extensively, there is in sate cases a distinct lack of data concerning redox properties and the products thereof. This is particularly true for complexes of the late transition and main group metals which are important in agriculture, industry, and chemical analysis. Hence, using electrochemical techniques, the redox behaviour of dithiocarbamate complexes of zinc, cadmium, mercury, lead, and tellurium has been examined. The products of oxidation and reduction have also been characterized by spectroscopic techniques (NMR, EPR, UV, and IR), mass spectrometry, conductivity, and Where possible, crystallographic study of an isolated compound. The species studied were without exception labile with the result that electrochemistry at mercury electrodes was influenced by the great stability of the mercury dithiocarbamate (Hg(RR’dtc) 2) complexes. Investigation of the latter showed that oxidative processes in the presence of mercury led to a new class of expounds: polymeric mercury dithiocarbamato cations. Oily one of these could be isolated as a solid, with the formula [Hg5(RR’dtc) 8](C104)2 For R=R’=ethyl the crystal structure was determined. For other metal dithiocarbamates the electrochemical behaviour at mercury electrodes in many ways paralleled that of the mercury analogues. Thus oxidative processes involved oxidation of electrode mercury to form mixed metal cationic species. Polarographic reduction led to the metal amalgam, usually via formation of mercury dithiocarbamate. Electrochemical studies at inert electrode materials such as platinum yielded distinctly different responses, with both oxidation and reduction being more difficult. Oxidation products at platinum electrodes gave identical polarographic responses to those firm mercury electrodes due to rapid interaction of the former with electrode mercury. The results are in sharp contrast to much of the previous work on transition metal dithiocarbamates for which electrochemical redox processes are often metal based arid not explicated by interaction with the electrode material.

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To fully consider production impacts, this thesis adopts a systems perspective and uses a biophysical model, DairyMod, to measure the interactions between system components and gauge the environmental impact of dairy farming arising from nitrogen use. Performance from the perspective of both the individual farmer and society is examined.

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Policy directives in agriculture have long been concerned with encouraging low producing farmers to retire - with limited success. From a healthy ageing perspective, the choice to remain on the farm into advancing years could appear a desirable policy outcome. Yet as farmers age, many with little prospect of inter-generational succession, there is growing concern that some farm families are beginning to experience extraordinary isolation, reduced health and quality of life, and increasing vulnerability with seemingly no choice but to stay on the farm and soldier on. The John Richards Initiative in Aged Care in Rural Australia hosted a forum on ‘ageing farmers', where the issues of healthy ageing and the barriers to retirement were discussed from three different perspectives - the demographic and economic drivers of structural ageing in the farm sector, the cultural and identity issues underlying retirement choices of farmers and the health and well-being implications of ageing on-farm. This article brings these diverse and interdisciplinary viewpoints together to explore the challenges and options for ageing farmers, where the question may be shifting from concerns about ‘who will run the farm' to ‘who will be there to take care of me'?

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Dr Sergie Bang is a Papua New Guinean who studied in Australia at the University of Western Australia in 1988-1993. He studied on an AIDAB Scholarship and completed a PhD in Agriculture. The interview is conducted in English by Dr Jonathan Ritchie of Deakin University, and Dr Musawe Sinebare of the Pacific Adventist University. This set comprises: an interview recording, a timed summary, and a photograph.

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Dr. Janet Pandi is a Papua New Guinean who studied at Adelaide University in 2002-2004, and in 2014-current. She studied on an ACIAR Jon Allwright Fellowship and completed a Masters in Agriculture during her first period of study in Australia, and is working on a PhD in her second. The interview was conducted in English on 9 September 2014 by Dr. Jonathan Ritchie of Deakin University and Dr. Musawe Sinebare of Pacific Adventist University. This set comprises: an interview recording, a timed summary and a photograph.

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Sugeng Prasetyo is an Indonesian who studied at the University of Melbourne in the 1980s. He studied on a Colombo Plan Scholarship and completed a Masters in Agriculture. The interview was conducted in English on 4 August 2014 by Dr. Jemma Purdey of Deakin University and Dr. Ahmad Suaedy of the Abdurrahman Wahid Centre for Inter-faith Dialogue and Peace at Universitas Indonesia. This set comprises: an interview recording, and a timed summary.

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M. H. Sarjan is an Indonesian who studied at Adelaide University on two occasions; in 1992-1994 and in 1999-2003. On both occasions he studied on Australian Agency for International Development (AusAID) Scholarships, and he completed his Masters, then his PhD in Agriculture. He has since been involved in a number of projects, and become a professor. The interview was conducted in English on 6 August 2014 by Dr. Jemma Purdey of Deakin University. This set comprises: an interview recording, a timed summary and a photograph.

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Suhubdy is an Indonesian who studied at the University of Queensland in 1994-1999. He studied on an Australian International Development Assistance Bureau (AIDAB) Scholarship which allowed him to start a Masters degree that led onto a PhD in Agriculture that he completed during his time in Australia. The interview was conducted by Dr. Jemma Purdey of Deakin University and Dr. Ahmad Suaedy of the Abdurrahman Wahid Centre for Inter-faith Dialogue and Peace at Universitas Indonesia. This set comprises: an interview recording, a timed summary, and a photograph.