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Статті в журналах з теми "Recreation areas Victoria Melbourne"
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Skotnicki, M. L., P. M. Selkirk, P. Broady, K. D. Adam, and J. A. Ninham. "Dispersal of the moss Campylopus pyriformis on geothermal ground near the summits of Mount Erebus and Mount Melbourne, Victoria Land, Antarctica." Antarctic Science 13, no. 3 (September 2001): 280–85. http://dx.doi.org/10.1017/s0954102001000396.
Повний текст джерелаАнотація:
Mount Melbourne in northern Victoria Land, Antarctica, is a glaciated 2733 m volcanic cone. The moss Compylopus pyriformis occurs on two small areas of steam-warmed snow-free ground near its summit. This moss species also occurs in temperate regions world-wide, but has not been recorded elsewhere in continental Antarctica. RAPD (Random Amplified Polymorphic DNA) studies of 26 samples of C. pyriformis from two areas of heated ground on Mount Melbourne showed there was genetic diversity within the population. Genetic evidence for dispersal between the two sites, together with some genetic variation within individual colonies, indicates a single colonisation event has probably occurred at this extremely isolated location followed by multiple mutations. A single sample of moss protonema was collected 25 years ago from steam-warmed ground near the summit of another volcano, Mount Erebus (3794 m), on Ross Island some 300 km south of Mount Melbourne. The moss could not be identified based on morphological and reproductive criteria, as all attempts to differentiate it to a recognisable gametophyte were unsuccessful. The RAPD technique has now shown it to be C. pyriformis, and closely related to the population on Mount Melbourne.
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Ponsford, Jennie, John Olver, Michael Ponsford, and Michael Schönberger. "Two-Year Outcome Following Traumatic Brain Injury and Rehabilitation: A Comparison of Patients From Metropolitan Melbourne and Those Residing in Regional Victoria." Brain Impairment 11, no. 3 (December 1, 2010): 253–61. http://dx.doi.org/10.1375/brim.11.3.253.
Повний текст джерелаАнотація:
AbstractBackground and Objective:Victoria's trauma management system provides acute care and rehabilitation following traumatic brain injury (TBI), with care of more complex injuries generally provided in specialist centres in metropolitan Melbourne. Little is known about how the outcomes of TBI survivors living in metropolitan Melbourne compare to those who reside in regional Victoria once they return to their community, where support services may be less available. The aim of the present study was to compare, in TBI individuals who have been treated at an inner-city rehabilitation centre in Melbourne, the long-term outcomes of those who live in metropolitan Melbourne (termed ‘Metro’) with those who reside in regional Victoria, termed ‘Regional.’Design and participants:Comparative study with quantitative outcome measures. A total of 959 patients, of whom 645 were designated ‘metro’ and 314 ‘regional’, were followed-up routinely at 2 years post-injury.Outcome measures:Structured Outcome Questionnaire, Glasgow Outcome Scale — Extended, Sickness Impact Profile, Craig Handicap Assessment and Reporting Technique, Hospital Anxiety and Depression Scale, Alcohol Use Disorders Identification Test and Drug Abuse Screening Test.Results:Few differences in outcomes were found between groups. However, after controlling for group differences in age and injury severity, some non-significant trends were suggestive of better outcomes in terms of less social isolation and anxiety and fewer dysexecutive behaviours in regional dwellers.Conclusions:These findings suggest that outcomes in patients from regional areas are at least as good as those from metropolitan Melbourne.
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Walter, Susan M. "Victorian Bluestone: a proposed Global Heritage Stone Province from Australia." Geological Society, London, Special Publications 486, no. 1 (September 20, 2018): 7–31. http://dx.doi.org/10.1144/sp486.1.
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AbstractVictorian Bluestone is proposed as a Global Heritage Stone Province from Australia. Numerous heritage stones occur within this province and of these Malmsbury Bluestone is suggested as a Global Heritage Stone Resource. Bluestone, an iconic basalt dimension stone from Victoria, is used domestically and internationally with a recognized heritage value. Sources are located in urban and country areas of Victoria some of which are still utilized for dimension stone. In many instances bluestone has superior technical characteristics, including durability, that surpass high-quality commercial sandstones, despite an architectural preference for lighter-coloured stones. These characteristics are matched by the diversity of significant uses for domestic, commercial and infrastructure purposes especially in Victoria. Notable examples include the Spotswood Pumping Station, Malmsbury Viaduct, the Graving Dock (Williamstown), Malmsbury Reservoir, St Patrick's Cathedral (Melbourne), Kyneton Railway Station and Ararat Gaol. If the bluestone used in pavements and drains is also considered, Victorian Bluestone could be described as Australia's most prominent infrastructure heritage stone. Bluestone use in Melbourne dates from the 1840s, in the other states of Australia and in New Zealand from 1873, with international interest from Asia between 1860 and 1880. The stone continues to be utilized widely around Australia and is also exported.
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Mills, Anthony, Jim Smith, and Peter Love. "Barriers to the Development of SME's in the Australian Construction Industry." Construction Economics and Building 2, no. 2 (November 17, 2012): 71–79. http://dx.doi.org/10.5130/ajceb.v2i2.2902.
Повний текст джерелаАнотація:
Small and medium sized companies (SMEs) operating in the construction industry in regionalareas of Australia often struggle to compete against city-based companies for constructionwork. This paper identifies the barriers that confront SMEs in areas outsidemajor cities, specifically in regional areas of Victoria (Australia) where local firms oftencompete unsuccessfully against large Melbourne-based organisations. The authors alsolook at the possibility of using e-commerce solutions to give regional SMEs greater competitivenessas well as considering possible policy initiatives that may assist these companiesto be more successful in tendering against city-based competition.
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Ward, SJ. "Life-History of the Feathertail Glider, Acrobates-Pygmaeus (Acrobatidae, Marsupialia) in South-Eastern Australia." Australian Journal of Zoology 38, no. 5 (1990): 503. http://dx.doi.org/10.1071/zo9900503.
Повний текст джерелаАнотація:
Acrobates pygmaeus was captured in nestboxes in three areas of central and southern Victoria: the Gembrook-Cockatoo area and Nar Nar Goon North east of Melbourne, and Daylesford north-west of Melbourne. Breeding was strictly seasonal and females produced two litters between July and February each year. Males also showed seasonal fluctuation in testes sizes. Mean litter size was 3.5 at birth and 2.5 at weaning. Pouch life lasted 65 days and young were weaned at approximately 100 days of age. Growth was slow and maternal investment in each young was high, and continued after weaning. Most individuals matured in the season following their birth, but some males did not mature until the second season after their birth. Maximum field longevity was at least three years. Comparisons are made with other small diprotodont marsupials.
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Narcisi, Biancamaria, Marco Proposito, and Massimo Frezzotti. "Ice record of a 13th century explosive volcanic eruption in northern Victoria Land, East Antarctica." Antarctic Science 13, no. 2 (June 2001): 174–81. http://dx.doi.org/10.1017/s0954102001000268.
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A volcanic event, represented by both coarse ash and a prominent sulphate peak, has been detected at a depth of 85.82 m in a 90 m ice core drilled at Talos Dome, northern Victoria Land. Accurate dating of the core, based on counting annual sulphate and nitrate fluctuations and on comparison with records of major known volcanic eruptions, indicates that the event occurred in 1254 ± 2 AD. The source volcano is most likely to be located within the Ross Sea region. In particular, the glass shards have a trachytic composition similar to rocks from The Pleiades and Mount Rittmann (Melbourne volcanic province), about 200 km from Talos Dome. Sulphate concentration is comparable with that of violent extra-Antarctic explosive events recorded in the same core, but atmospheric perturbation was short-lived and localized, suggesting a negligible impact on regional climate. It is suggested that this eruption may represent the most important volcanic explosion in the Melbourne province during the last eight centuries; thus this event may also represent a valuable chrono-stratigraphical marker on the East Antarctic plateau and in adjoining areas.
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Howes, Hilary. "Lothar Becker’s contributions to anthropology." Historical Records of Australian Science 30, no. 2 (2019): 138. http://dx.doi.org/10.1071/hr19004.
Повний текст джерелаАнотація:
Warning Readers of this article are warned that it may contain terms, descriptions and opinions that are culturally sensitive and/or offensive to Aboriginal and Torres Strait Islanders. Silesian traveller-naturalist Lothar Becker’s two visits to Victoria in 1849–52 and 1855–65 brought him into contact with Aboriginal people living in Western Victoria, Melbourne, the Murray River at Albury, and Gippsland. His travels took him to areas now recognised as the traditional lands of the Gunaikurnai, Wathaurung, Wiradjuri and Wurundjeri peoples. Becker’s publications include scattered observations on Aboriginal appearance, lifeways, diet, skills, and beliefs. Although these observations were limited by his inability to speak any Aboriginal languages and coloured by his assumptions about the inferiority of Aboriginal culture, they nevertheless document small but significant fragments of what has recently been termed ‘Aboriginal Biocultural Knowledge’.
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Howes, Hilary. "Corrigendum to: Lothar Becker’s contributions to anthropology." Historical Records of Australian Science 30, no. 2 (2019): 199. http://dx.doi.org/10.1071/hr19004_co.
Повний текст джерелаАнотація:
WarningReaders of this article are warned that it may contain terms, descriptions and opinions that are culturally sensitive and/or offensive to Aboriginal and Torres Strait Islanders. Silesian traveller-naturalist Lothar Becker's two visits to Victoria in 1849–52 and 1855–65 brought him into contact with Aboriginal people living in Western Victoria, Melbourne, the Murray River at Albury, and Gippsland. His travels took him to areas now recognised as the traditional lands of the Gunaikurnai, Wathaurung, Wiradjuri and Wurundjeri peoples. Becker's publications include scattered observations on Aboriginal appearance, lifeways, diet, skills, and beliefs. Although these observations were limited by his inability to speak any Aboriginal languages and coloured by his assumptions about the inferiority of Aboriginal culture, they nevertheless document small but significant fragments of what has recently been termed ‘Aboriginal Biocultural Knowledge'.
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Horne, PA. "Comparative Life Histories of 2 Species of Notonomus (Coleoptera, Carabidae) in Victoria." Australian Journal of Zoology 40, no. 2 (1992): 163. http://dx.doi.org/10.1071/zo9920163.
Повний текст джерелаАнотація:
The distributions and life histories of two species of carabid beetles, Notonomus gravis and Notonomus philippi, are compared. N. gravis inhabits the western grassland plains of Victoria and N. philippi inhabits woodland in the Otway Ranges and areas east of Melbourne. Adults of both species show peak activity in summer after emergence, with larval development from autumn to spring. The development of N. philippi occurs approximately one month earlier than that of N. gravis. Both species readily accept larval Lepidoptera as food, are nocturnal and are the dominant carabids in their respective habitats. N. gravis has potential as a biological control agent, and the carabid communities may be used as environmental indicators.
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Cooke, B. D. "Swamp wallaby (Wallabia bicolor) distribution has dramatically increased following sustained biological control of rabbits." Australian Mammalogy 42, no. 3 (2020): 321. http://dx.doi.org/10.1071/am19037.
Повний текст джерелаАнотація:
Swamp wallabies have dramatically extended their distribution through western Victoria and south-eastern South Australia over the last 40 years. Newspaper reports from 1875 onwards show that on European settlement, wallaby populations were confined to eastern Victoria, including the ranges around Melbourne, the Otway Ranges and Portland District of south-western Victoria, and a tiny part of south-eastern South Australia. Populations contracted further with intense hunting for the fur trade until the 1930s. In the late 1970s, however, wallabies began spreading into drier habitats than those initially recorded. Possible causes underlying this change in distribution are discussed; some seem unlikely but, because wallabies began spreading soon after the introduction of European rabbit fleas as vectors of myxomatosis, the cumulative effects of releases of biological agents to control rabbits appear important. A caution is given on assuming that thick vegetation in high-rainfall areas provides the only habitat suitable for swamp wallabies, but, most importantly, the study shows how native mammals may benefit if rabbit abundance is reduced.
Дисертації з теми "Recreation areas Victoria Melbourne"
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Price, Nina. "Waitangi Park : public land in competition : a thesis submitted to the Victoria University of Wellington in partial fulfilment of the requirements for the degree of Master of Arts in Sociology /." ResearchArchive@Victoria e-thesis, 2009. http://hdl.handle.net/10063/1064.
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"Refreshing the Victoria." 1997. http://library.cuhk.edu.hk/record=b5889078.
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Leung Chi Keung Pal."Architecture Department, Chinese University of Hong Kong, Master of Architecture Programme 1996-97, design report."
Includes bibliographical references.
Acknowlegements
Chapter 1. --- Background --- p.1
Chapter 1.1 --- Client & Needs --- p.1
Chapter 1.2 --- Design Objectives --- p.1
Chapter 1.3 --- Planning (statutory) Constraints --- p.2
Chapter 1.4 --- Site Selection --- p.2
Chapter 1.5 --- Site Context --- p.3
Chapter 1.6 --- Programme --- p.4
Chapter 2. --- Planning Strategy --- p.5
Chapter 2.1 --- Phasing of Development --- p.5
Chapter 2.2 --- Design Philosophy --- p.7
Chapter 2.3 --- Design Development --- p.8
Chapter 2.4 --- Zoning --- p.9
Chapter 2.5 --- Site Planning --- p.10
Chapter 2.6 --- Functional Relations --- p.13
Chapter 3. --- Environmental Issue --- p.16
Chapter 3.1 --- Climatic Control --- p.16
Chapter 3.2 --- Lighting Strategy --- p.21
Chapter 3.3 --- Acoustics --- p.25
Chapter 3.4 --- Plumbing & Drainage --- p.25
Chapter 3.5 --- Power --- p.25
Chapter 4. --- Life safety --- p.27
Chapter 4.1 --- Compartmentation --- p.27
Chapter 4.2 --- Fire Engineering --- p.27
Chapter 4.3 --- Means of Escape --- p.29
Chapter 5. --- Structure & Construction --- p.30
Chapter 5.1 --- Structural Strategy --- p.30
Chapter 5.2 --- Construction & Maintenance --- p.34
Appendix --- p.35
Presentation Drawings
Programming Report
Книги з теми "Recreation areas Victoria Melbourne"
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U, S. /Mexico Border States Conference on: Recreation Parks and Wildlife (6th 1994 Ciudad Victoria Mexico). 6th U.S./Mexico Border States Conference on Recreation, Parks, and Wildlife =: 6a. Conferencia de los Estados Fronterizos México/E.U.A. sobre Recreación, Areas Protegidas y Fauna Silvestre : memoria : abril 27, 28 y 29 de 1994, Cd. Victoria, Tam., México. [Ciudad Victoria, Tamaulipas, México]: Gobierno del Estado de Tamaulipas, 1994.
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Hoang, Phuong. Australian Liveability Rating: Liveability Rating for 79 Local Government Areas in Melbourne/Victoria a Report by Citydataaustralia. Com. Au. Independently Published, 2018.
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Secret Beaches Of Greater Victoria View Royal To Sidney. Heritage House Publishing, 2010.
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Women in life: Women in leisure conference : first conference of women, examining and recommedning to the Government of Victoria on the recreation, leisure and lifestyles of women, 25th and 26th October, 1982, Melbourne. Melbourne, Victoria: Dept. of Youth, Sport and Recreation, 1986.
Знайти повний текст джерелаЧастини книг з теми "Recreation areas Victoria Melbourne"
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Fildes, Brian N., Brendan Lawrence, Luke Thompson, and Jennie Oxley. "Speed-Limits in Local Streets: Lessons from a 30 km/h Trial in Victoria, Australia." In The Vision Zero Handbook, 881–901. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-76505-7_34.
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AbstractFatal and Severe Injuries (FSI) to vulnerable road users is a major road safety problem internationally. Recent resolutions by the Global Ministerial Conference on Road Safety called for a blanket 30 km/h speed limit in urban areas to address this problem. A project undertaken in Melbourne, Australia, set out to evaluate the effectiveness and benefits of a lower speed limit in a local residential area in the City of Yarra. The intervention comprised replacing 40 km/h speed limit signs in the treated area with 30 km/h signs with an adjacent untreated control area. A before and after study was employed with speed, resident surveys, and estimated safety benefits as measures of its success. Modest reductions in mean speed were observed in the after-phase of the study while benefits were impressive for vehicles travelling at higher speed levels where the risk of severe injury or death is greater. These findings represent an estimated 4% reduction in the risk of severe injury for pedestrians in the event of a collision. Questionnaire responses showed an increased degree of support for the 30 km/h speed limit in local streets in the trial area. The implication of these findings for road safety is discussed, along with the challenges and potential hurdles. Lower speed limits in local streets and municipalities is one important measure to help address vulnerable road users in residential local streets.
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Fildes, Brian N., Brendan Lawrence, Luke Thompson, and Jennie Oxley. "Speed-Limits in Local Streets: Lessons from a 30 km/h Trial in Victoria, Australia." In The Vision Zero Handbook, 1–22. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-23176-7_34-1.
Повний текст джерелаАнотація:
AbstractFatal and Severe Injuries (FSI) to vulnerable road users is a major road safety problem internationally. Recent resolutions by the Global Ministerial Conference on Road Safety called for a blanket 30 km/h speed limit in urban areas to address this problem. A project undertaken in Melbourne, Australia, set out to evaluate the effectiveness and benefits of a lower speed limit in a local residential area in the City of Yarra. The intervention comprised replacing 40 km/h speed limit signs in the treated area with 30 km/h signs with an adjacent untreated control area. A before and after study was employed with speed, resident surveys, and estimated safety benefits as measures of its success. Modest reductions in mean speed were observed in the after-phase of the study while benefits were impressive for vehicles travelling at higher speed levels where the risk of severe injury or death is greater. These findings represent an estimated 4% reduction in the risk of severe injury for pedestrians in the event of a collision. Questionnaire responses showed an increased degree of support for the 30 km/h speed limit in local streets in the trial area. The implication of these findings for road safety is discussed, along with the challenges and potential hurdles. Lower speed limits in local streets and municipalities is one important measure to help address vulnerable road users in residential local streets.
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Błaszczuk, Katarzyna. "Zapobieganie wykluczeniu społecznemu : przykład Stowarzyszenia na rzecz Kobiet "Victoria"." In Eliminacja wykluczenia społecznego, 37–53. Uniwersytet Papieski Jana Pawła II w Krakowie. Wydawnictwo Naukowe, 2016. http://dx.doi.org/10.15633/9788374385824.04.
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“Victoria” Association for Women was established in 2002. Its operations focus on problems faced by women from various backgrounds, and with varied professional, legal and social status. Assistance for women struggling with difficulties involves: support in efforts to become independent, improvement of self-esteem, and finding way in the job market. The Association organizes courses, trainings as well as conferences and promotes new forms of employ-ment. The organization is an advocate for individuals (groups) marginalized in the community; its services include legal, psychological, family and career counselling. It cooperates and initiates partnerships with institutions administered by local governments, with trade unions, nongovernmental organizations and economic entities. The areas of activity include: aid and support for families facing difficulties, health care, protection of rights, counteracting unemployment, promotion of education, culture and ecology, operations fostering integra-tion and cooperation at the local and in-ternational level, promotion of tourism and recreation, public order and safety. Yet, due to its location in an old building with no elevator, the organization’s office is inaccessible for people with motor disabilities. The paper will discuss selected areas of the organization’s operation tak-ing into account findings acquired from official documents and freeform interviews with representatives of the board.
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Lee, Mark J. W., and Catherine McLoughlin. "Supporting Peer-to-Peer E-Mentoring of Novice Teachers Using Social Software." In Cases on Online Tutoring, Mentoring, and Educational Services, 84–97. IGI Global, 2010. http://dx.doi.org/10.4018/978-1-60566-876-5.ch007.
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The Australian Catholic University (ACU National at www.acu.edu.au) is a public university funded by the Australian Government. There are six campuses across the country, located in Brisbane, Queensland; North Sydney, New South Wales; Strathfield, New South Wales; Canberra, Australian Capital Territory (ACT); Ballarat, Victoria; and Melbourne, Victoria. The university serves a total of approximately 27,000 students, including both full- and part-time students, and those enrolled in undergraduate and postgraduate studies. Through fostering and advancing knowledge in education, health, commerce, the humanities, science and technology, and the creative arts, ACU National seeks to make specific and targeted contributions to its local, national, and international communities. The university explicitly engages the social, ethical, and religious dimensions of the questions it faces in teaching, research, and service. In its endeavors, it is guided by a fundamental concern for social justice, equity, and inclusivity. The university is open to all, irrespective of religious belief or background. ACU National opened its doors in 1991 following the amalgamation of four Catholic tertiary institutions in eastern Australia. The institutions that merged to form the university had their origins in the mid-17th century when religious orders and institutes became involved in the preparation of teachers for Catholic schools and, later, nurses for Catholic hospitals. As a result of a series of amalgamations, relocations, transfers of responsibilities, and diocesan initiatives, more than twenty historical entities have contributed to the creation of ACU National. Today, ACU National operates within a rapidly changing educational and industrial context. Student numbers are increasing, areas of teaching and learning have changed and expanded, e-learning plays an important role, and there is greater emphasis on research. In its 2005–2009 Strategic Plan, the university commits to the adoption of quality teaching, an internationalized curriculum, as well as the cultivation of generic skills in students, to meet the challenges of the dynamic university and information environment (ACU National, 2008). The Graduate Diploma of Education (Secondary) Program at ACU Canberra Situated in Australia’s capital city, the Canberra campus is one of the smallest campuses of ACU National, where there are approximately 800 undergraduate and 200 postgraduate students studying to be primary or secondary school teachers through the School of Education (ACT). Other programs offered at this campus include nursing, theology, social work, arts, and religious education. A new model of pre-service secondary teacher education commenced with the introduction of the Graduate Diploma of Education (Secondary) program at this campus in 2005. It marked an innovative collaboration between the university and a cohort of experienced secondary school teachers in the ACT and its surrounding region. This partnership was forged to allow student teachers undertaking the program to be inducted into the teaching profession with the cooperation of leading practitioners from schools in and around the ACT. In the preparation of novices for the teaching profession, an enduring challenge is to create learning experiences capable of transforming practice, and to instill in the novices an array of professional skills, attributes, and competencies (Putnam & Borko, 2000). Another dimension of the beginning teacher experience is the need to bridge theory and practice, and to apply pedagogical content knowledge in real-life classroom practice. During the one-year Graduate Diploma program, the student teachers undertake two four-week block practicum placements, during which they have the opportunity to observe exemplary lessons, as well as to commence teaching. The goals of the practicum include improving participants’ access to innovative pedagogy and educational theory, helping them situate their own prior knowledge regarding pedagogy, and assisting them in reflecting on and evaluating their own practice. Each student teacher is paired with a more experienced teacher based at the school where he/she is placed, who serves as a supervisor and mentor. In 2007, a new dimension to the teaching practicum was added to facilitate online peer mentoring among the pre-service teachers at the Canberra campus of ACU National, and provide them with opportunities to reflect on teaching prior to entering full-time employment at a school. The creation of an online community to facilitate this mentorship and professional development process forms the context for the present case study. While on their practicum, students used social software in the form of collaborative web logging (blogging) and threaded voice discussion tools that were integrated into the university’s course management system (CMS), to share and reflect on their experiences, identify critical incidents, and invite comment on their responses and reactions from peers.
Тези доповідей конференцій з теми "Recreation areas Victoria Melbourne"
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Tatnall, Arthur, Chris Groom, and Stephen Burgess. "Electronic Commerce Specialisations in MBAs: An Australian University Case Study." In 2002 Informing Science + IT Education Conference. Informing Science Institute, 2002. http://dx.doi.org/10.28945/2578.
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This paper looks at the development of Electronic Commerce specialisations in an MBA program, and particularly at a recent specialisation developed at Victoria University, Australia for its local and overseas MBA students. These MBA specialisations are very popular in Australia, and half of the MBA programs with specialisations have one in an e-Commerce related field. An examination of some of these specialisations highlighted in the literature, or in Australian universities, shows that the two most popular topics in them are e-Marketing, the management of e-Commerce in business and e-Commerce business models. Victoria University has recently introduced an e-Commerce specialisation that targets these areas, as well as other popular uses of Internet technologies in business and the development of e-Commerce web sites. This specialisation is explained in the paper, along with the different modes ol the specialisation delivered at Victoria University campuses in Melbourne, Singapore and Beijing.
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Torgovnikov, Grigory, and Graham Brodie. "G. Brodieand, G. Torgovnikov. EXPERIMENTAL STUDY OF MICROWAVE SLOW WAVE COMB AND CERAMIC APPLICATORS FOR SOIL TREATMENT AT FREQUENCY 2.45 GHZ." In Ampere 2019. Valencia: Universitat Politècnica de València, 2019. http://dx.doi.org/10.4995/ampere2019.2019.9651.
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EXPERIMENTAL STUDY OF MICROWAVE SLOW WAVE COMB AND CERAMIC APPLICATORS FOR SOIL TREATMENT AT FREQUENCY 2.45 GHZ. G. Brodie and G. Torgovnikov University of Melbourne, 4 Water St, Creswick, Victoria 3363, Australia; e-mail: grigori@unimelb.edu.au Keywords: ceramic applicator, comb applicator, microwave, slow wave, soil microwave treatment In many cases in industry it is required to heat or treat surface layers of different material (soil, timber, concrete, plastics and so on) with microwaves (MW). Traditional MW irradiators (antennas) cannot provide heating only in the surface areas and energy penetrates deep into the material, where it decays exponentially due to normal attenuation. Therefore, energy losses, if a heating depth of 20 - 40 mm (for example to heat soil for killing weed seeds) is all that is required, are very significant. Therefore, it is required to develop special MW applicators for surface treatment to increase process efficiency. To address this problem, a slow wave (which is sometimes called a "surface wave" applicator) comb and ceramic structures, was studied. The main property of slow waves is that the energy concentration is very near impedance electrode – comb or ceramic plate surface. Previously, slow wave structures were used mostly as delay lines and as interaction circuits in MW vacuum devices, and their properties were explored only for these specific applications. The work objectives of this study were: design slow wave, ceramic and comb structure applicators for soil treatment at frequency 2.45 GHz;experimentally study the energy distribution from slow wave applicators in the soil;study of opportunities to use slow wave structures for surface soil layer heating; andrecommendations for practical use of new slow wave applicators. Comb and ceramic slab applicators for frequency 2.45 GHz operation were designed for the soil treatment on the bases of theoretical studies and computer modelling. The comb applicator was made from aluminium and the ceramic slab applicator was made from alumina (DC=9.8, loss tangent=0.0002). A 30 kW (2.45 GHz) microwave generator was used for experiments. Containers with soil were placed on the applicator surface. An auto tuner was used in MW system to provided good impedance matching of the generator and applicators (with soil on top). This resulted in practically no power reflection. The soil “Potting Mix Hortico”, with moisture content range 32-174% and density range 590-1070 kg/m3, was used for the experiments. Energy distribution in the soil was determined by temperature measuring in the soil using thermocouples, after MW heating. Distribution of temperature measuring points covered the whole volume of the soil along and across the applicator. Results of the experiments showed that the comb applicator provides maximum energy release in soil in the central vertical plane. The ceramic alumina applicator forms two temperature maximums in two vertical planes at a distance of about 40 mm from the central applicator plane and a minimum in the applicator central plane. The ceramic applicator provides better uniformity of energy distribution across the width of the applicator due to the two temperature maximums. It reduces overheating of the soil surface and energy losses. The depth of energy penetration provided by ceramic applicator is lower compared with the comb applicator. It means that the ceramic applicator provides better energy localization and more energy absorption in the soil surface layers compared with the comb applicator. To provide better uniformity of energy distribution across the ceramic applicator it is recommended to use ceramics with higher dielectric constants, such as in the range of 15-25, which will allow more energy to be released closer to the applicator surface. It will increase efficiency of MW energy use. The ceramic applicator is more effective for MW treatment of the soil surface areas and is recommended for practical use in machines for thermal treatment and sterilization of surface layers of the soil and other materials.