Heavy tools manipulation by low powered direct-drive five-bar parallel robot

This paper presents a simple and available system for manipulation of heavy tools by low powered manipulator for industrial applications. In the heavy manufacturing industries, sometimes, heavy tools are employed for different types of work. But the application of robots with heavy tools is not possible due to the limited torque limits of actuators. Suspended tool systems (STS) have been proposed to manipulate heavy tools by low powered robot-arm for this purpose. A low powered five-bar direct-drive parallel manipulator is designed and constructed to manipulate heavy tools suspended from a spring balancer. The validity, usefulness, and effectiveness of the suspended tool system are shown by experimental results.

Androgenic activity of effluent from forty-five municipal waste water treatment plants in Victoria, Australia

It is well known that waste water treatment plant (WWTP) effluents are estrogenic. There has been much less consideration of the androgenic activity of WWTP effluents. To partly address the shortage of information on androgens in Australian WWTP effluents, in August 2006, and again in 2007, we collected discharges from up to 45 Victorian WWTPs (~25% of all WWTPs in Victoria), grouped by treatment process, i.e. activated sludge, extended aeration, and lagoon based treatment, and measured the total estrogenic, androgenic, retinoic acid, and aromatic hydrocarbon hydrogenase activity of the effluents using a hybrid yeast bioassay. This paper will concentrate on the androgenic activity and male hormone concentrations.

Good governance - not just for the big boys governance in organizations in New Zealand

Good governance is recognized as a fundamental indicator of the success of a company. For a small- midsized company, this is particularly so, as such companies must be able to competitively demonstrate their flexibility in the face of market forces. This flexibility is the primary advantage they hold over larger firms (Dalton, Daily, Ellstrand and Johnson, 1998). Such companies, however, can find it difficult to attract good directors (Daum and Neff, 2003) and this makes developing improved strategies of governance a challenge. Taylor, Chait and Holland suggest top directors are not attracted to small/ medium companies because “the stakes remain low, the meetings process-driven, the outcomes ambiguous, and the deliberations insular” (Taylor, Chait and Holland, 2001). We suggest that the attraction of quality directors is a uniquely impacting situation for small and mid-size firms, as it is there where additional management resources should be needed most urgently. Directors on the boards of small-medium sized businesses are often lagging behind directors of large companies in that they are less likely to be independent external directors and are less likely to represent a diversity of attributes (Dalton, Daily, Ellstrand and Johnson, 1998). Arthur Levitt, former United States Securities and Exchange Commission Chair, describes the culture of medium sized business directorships as a “kind of a fraternity of CEOs who serve on one another's boards” (Stainburn, 2005). In addition, evidence suggests directors of small- medium businesses are often insufficiently trained for the role. Uncertain directors may, for example, be unwilling to ask crucial questions of managers before making major decisions. “Board members sometimes are made to feel that asking a thorny question or advancing an alternative opinion is disloyal to the administration” (Taylor, Chait and Holland, 2001). Small and medium businesses, however, are a growing contributor to the national economies of countries internationally. In New Zealand, small and medium-size firms recording large GDP values, ahead of many large businesses, which makes our investigation into good governance practices of SMEs relevant to suggest areas in which these firms can improve their governance policies and practices. We have reviewed more than 2,000 directors, executives and investors in New Zealand, making this one of the largest non-government surveys in governance. Supported by 16 large corporate organizations, such as KPMG, Business New Zealand, Simpson Grierson, Brook Asset Management, Porter Novelli, Sheffield and ‘Management’ Magazine, this work suggests that the current processes through which directors are selected and trained to serve on Boards of small and medium businesses needs to be altered. We are also concerned over the lack of director education and the close involvement of the Chief Executives as members of the Boards. There is a general concern over the lack of director independence and whether directors are effective in their roles. We are recommending an alternative process for SMEs to select directors, which will hopefully expand the available pool of directors in quantity and quality.

How big is a billion?

The counting techniques used in the subject of mathematics is discussed in this article. The various numeration methods are also explained which can be used so that the children can easily understand maths.

Are youth mentoring programs good value-for-money? An evaluation of the Big Brothers Big Sisters Melbourne program

Background : The Big Brothers Big Sisters (BBBS) program matches vulnerable young people with a trained, supervised adult volunteer as mentor. The young people are typically seriously disadvantaged, with multiple psychosocial problems.

Methods : Threshold analysis was undertaken to determine whether investment in the program was a worthwhile use of limited public funds. The potential cost savings were based on US estimates of life-time costs associated with high-risk youth who drop out-of-school and become adult criminals. The intervention was modelled for children aged 10–14 years residing in Melbourne in 2004.

Results : If the program serviced 2,208 of the most vulnerable young people, it would cost AUD 39.5 M. Assuming 50% were high-risk, the associated costs of their adult criminality would be AUD 3.3 billion. To break even, the program would need to avert high-risk behaviours in only 1.3% (14/1,104) of participants.

Conclusion : This indicative evaluation suggests that the BBBS program represents excellent 'value for money'.

Is there global inclusion of authors in the five leading advertising journals? A regional comparison 1998-2007

A question that has been raised in academia has to do with whether there is global inclusion of authors in publishing. While this issue has been explored in some areas in business and marketing it has generally not been investigated across 30 years of advertising research activity. This paper seeks to examine the global inclusion of authors in five advertising-focused journals. We found that, while there appears to be an increase in international publishing activity in advertising compared to data extrapolated from past studies, published advertising research still reveals a North American bias/domination. A failure to be globally inclusive may lead to an under-exploration of academic issues and perspectives, as important 'non-US' issues could possibly be ignored.

Is there global inclusion in publishing in the five leading advertising journals and does this relate to general publishing performance : a regional comparison

The question has been raised in academia whether there is global inclusion of authors in publishing. This has generally not been explored in the 30 years of research on advertising research activity and those works that do exist in advertising have generally only examined three North American focused journals. This paper expands the set of journals to five advertising focused journals and thus is a global examination of publishing in advertising. Within these five advertising journals there is an increased international involvement and thus it appears that a broader set of perspectives are being considered in the advertising literature. We also found that there is a positive correlation between publishing in the five leading advertising journals and four leading generalist journals, suggesting that institutions may be developing broader research cultures, rather than targeting works only in advertising.

What is wrong with a big house?

ln Australia in the 1950s, the average house size was approximately 100 mz. By 2008, the average size of a new house had risen to approximately 238 mz i.e. an increase of nearly 140%. Over the same period, occupancy levels have fallen by nearly one third from 3.7 to 2.5 persons per household. The aim of this paper is to contrast the total and per capita resource demand (direct and embodied energy, water and materials) for two houses typical of their respective era and draw some conclusions from the results. Using the software Autodesk Revit Architecture and drawings for typical 1950 and 2009 houses, the material quantities for these dwellings have been determined. Using known coefficients, the embodied energy and water in the materials have been calculated. Operating energy requirements have been calculated using NatHERS estimates. Water requirements have been calculated using historical and current water data. The greenhouse gas emissions associated with the resource use have also been calculated using established coefficients. Results are compared on a per capita basis. The research found that although the energy to operate the modern house and annual water use had fallen, the embodied energy and associated greenhouse gas emissions from material use had risen significantly. This was driven by the size of the house and the change in construction practices.

Habitat use by five sympatric Australian freshwater crayfish species (Parastacidae)

1. The Grampians National Park in Victoria is a 'hot spot' for freshwater crayfish diversity, with seven species from six genera occurring in sympatry. Few studies have examined how multiple species of freshwater crayfish co-exist across landscapes consisting of a mosaic of perennial and seasonal habitats. Despite their endemicity and likely key role in freshwaters, the ecology and biology of these crayfish remains unknown.

2. This study determined the distribution and habitat use of five crayfish species (Euastacus bispinosus, Cherax destructor, Geocharax falcata, Gramastacus insolitus and Engaeus lyelli). Seasonal sampling surveys ascertained whether crayfish distribution was related to habitat type, environmental or physicochemical variables, catchment or season.

3. Distribution was directly related to habitat type and the environmental and physicochemical variables that characterised habitats. Engaeus lyelli, G. falcata and G. insolitus occurred predominantly in floodplain wetlands and flooded vegetation habitats, E. bispinosus occurred only in flowing soft-sediment channels and C. destructor was found in all catchments and habitat types studied. Gramastacus insolitus co-occurred with G. falcata at all sites except two, so no distinct habitat separations were apparent for these two species.

4. A high percentage cover of boulders was the best indicator of crayfish absence, and discriminated between habitat types and crayfish species: it was probably a surrogate for a larger range of environmental and physicochemical variables. Catchment and season did not affect crayfish distribution.

5. These crayfish species varied in their degree of habitat specialisation from strongly generalist (C. destructor) to occupying only a specific habitat type (E. bispinosus). Some species appeared specialised for seasonal wetlands (G. insolitus and G. falcata). Overlap in site occupancy also varied: G. insolitus and G. falcata distributions were strongly associated, whereas C. destructor appeared to occur opportunistically across habitats, both alone and co-occurring with all the other species.

6. Management strategies to conserve multiple species of crayfish co-existing within landscapes will need to incorporate a range of perennial and seasonal habitat types to ensure sufficient space is available for species to maintain different occupancy patterns. Given that water resources are under increasing pressure and are strongly regulated within the Grampians National Park, this may present a conservation challenge to water managers in this location.

From what we know to how we use it : five principles for turning entrepreneurship research and practitioner action guidelines

This and the companion paper that follows owe their existence to a paper presented by Kevin Hindle at the AGSE Regional Entrepreneurship and Innovation Research Exchange in February 2004. In his paper, Hindle (2004) argued passionately that entrepreneurship researchers must ensure that the best of their hardwon wisdom does not find its beginning motivation and final resting place in the pages of arcane journals that practitioners never read. He suggested that if every entrepreneurship researcher committed, say once every two years, to write a "how to" article it would significantly enhance the status of the research community in the eyes of practising entrepreneurs and those who provide support and services to them.

The argument was well-received, particularly by two people in the audience, Robert Anderson, the managing editor of the Journal of Small Business and Entrepreneurship, the journal of the Canadian Council for Small Business and Entrepreneurship/Conseil Canadien des PME et de l'entrepreneuriat (CCSBE/ CCPME), and Brian Gibson, the editor of Small Enterprise Research, the journal of the Small Enterprise Association of Australia and New Zealand (SEAANZ). For both editors, Hindle's argument was a familiar one. The membership of CCSBE/CCPME and SEAANZ consists of academic researchers, educators, government employees in both policy and program areas, and those offering support and services to entrepreneurs and the managers of small enterprises. In both organizations, there is a general consensus that the needs of "academics" are well met, but not so the needs of the non-academic constituents.

Assessing the efficacy and standardization potential of five competing venture capital investment evaluation approaches

The research objective behind this article was to perform a critical evaluation and comparison of five representative business plan evaluation aids (BPEAs) to facilitate constructive discussion of the proposition that greater standardization of venture capital decision-making might be both desirable and possible. The five BPEAs were systematically compared using a structured, taxonomic process. The evidence of this investigation suggests a clear superiority of BPEAs that are based on the researched attributes of successful ventures and use actuarial modeling. Discussion centered on the importance of using BPEAs in a quest for greater consistency during venture capital investment decision-making.

Extreme surfing : personal and psychological aspects of big wave riders

This qualitative study investigated personal and psychological aspects of big wave riders. A cross-sectional design with non probability purposive sampling was used to gain personal interviews with 32 elite surfers who regularly ride big, life threatening waves. Each athlete was asked three open questions: 1. What do you think are the most important qualities and attributes a surfer needs for riding big waves? 2. What type of mindset is best for riding big waves?, and 3.What motivates you to ride big waves? Content analysis of the taped interview transcripts revealed seven key qualities and attributes including having a thrill seeking, confident and goal oriented personality, a high level of mental strength and control, and an intimate relationship with the ocean. The best mindset included an individually defined arousal level, a committed attitude, and a simple, yet highly aware, focus. Motivations were primarily intrinsic, though drives indicative of a behavioral addiction to the act of riding big waves also emerged. Evidence of common developmental stages for riding big waves also arose from the interviews. Optimal mental approach and preparation techniques are discussed that will enable big wave riders, and other extreme athletes, to more safely and successfully manage extreme situations.