Parallel methods for short read assembly

This work is on the parallel de novo assembly of genomic sequences from short sequence reads. With short reads eliminating the reliability of read overlaps in predicting genomic co-location, a revival of graph-based methods has underpinned the development of short-read assemblers. While these methods predate short read technology, their reach has not extended significantly beyond bacterial genomes due to the memory resources required in their use. These memory limitations are exacerbated by the high coverage needed to compensate for shorter read lengths. As a result, prior to our work, short-read de novo assembly had been demonstrated on relatively small genome sizes with a few million bases. In our work, we advance the field of short sequence assembly in a number of ways. First, we extend models and ideas proposed and tested with small genomes on serial machines to large-scale distributed memory parallel machines. Second, we present ideas for assembly that are especially suited to the reconstruction of very large genomes on these machines. Additionally, we present the first assembler that specifically takes advantage a variable number of fragment sizes or insert lengths concurrently when making assembly decisions, while still working well for data with one insertion length

Factors influencing the employment of Australian PhD graduates

It has long been argued in many Western countries that having a highly skilled workforce is crucial to innovation and national competitiveness. Ensuring the employment of the most highly educated members of a country\u27s population is integral to helping achieve such economic outcomes. Therefore, the objective of this study is to identify the major factors that account for the initial full-time employment of Australian-trained PhD graduates. It draws on a national survey conducted in 2011 (n = 2761) and 2012 (n = 3181) of PhD graduates in Australia across all major disciplines four to six months after conferral of their degree. The findings reveal that previous work experience; attendance at a research-intensive university; completing one\u27s degree off campus; part-time status; the use of certain job search strategies and access to research culture and networking opportunities; as well as certain demographic characteristics influence initial post-graduation job attainment. Implications of the findings are discussed

Terahertz single pixel imaging based on a Nipkow disk

We describe a terahertz single pixel imaging system based on a Nipkow disk. Nipkow disks have been used for fast scanning imaging systems since the first experimental television was invented in 1926. In our work, a Nipkow disk with 24 scanning lines was used to provide an axial resolution of 2 mm/pixel. We also show that by implementing a microscanning technique the axial resolution can be further improved to 0.5 mm/pixel. Imaging of several objects was demonstrated to show that this simple scanning system is promising for fast and/or real time terahertz imaging applications

Imaging X-ray spectrometer

An X-ray spectrometer for providing imaging and energy resolution of an X-ray source is described. This spectrometer is comprised of a thick silicon wafer having an embedded matrix or grid of aluminum completely through the wafer fabricated, for example, by thermal migration. The aluminum matrix defines the walls of a rectangular array of silicon X-ray detector cells or pixels. A thermally diffused aluminum electrode is also formed centrally through each of the silicon cells with biasing means being connected to the aluminum cell walls and causes lateral charge carrier depletion between the cell walls so that incident X-ray energy causes a photoelectric reaction within the silicon producing collectible charge carriers in the form of electrons which are collected and used for imaging

Reinforcer magnitude and demand under fixed-ratio schedules with domestic hens

This study compared three methods of normalizing demand functions to allow comparison of demand for different commodities and examined how varying reinforcer magnitudes affected these analyses. Hens responded under fixed-ratio schedules in 40-min sessions with response requirement doubling each session and with 2-s, 8-s, and 12-s access to wheat. Over the smaller fixed ratios overall response rates generally increased and were higher the shorter the magazine duration. The logarithms of the number of reinforcers obtained (consumption) and the fixed ratio (price) were well fitted by curvilinear demand functions (Hursh et al., 1988. Journal of the Experimental Analysis of Behavior 50, 419–440) that were inelastic (b negative) over small fixed-ratios. The fixed ratio with maximal response rate (Pmax) increased, and the rate of change of elasticity (a) and initial consumption (L) decreased with increased magazine duration. Normalizing consumption using measures of preference for various magazine durations (3-s vs. 3-s, 2-s vs. 8-s, and 2-s vs. 12-s), obtained using concurrent schedules, gave useful results as it removed the differences in L. Normalizing consumption and price (Hursh and Winger, 1995. Journal of the Experimental Analysis of Behavior 64, 373–384) unified the data functions as intended by that analysis. The exponential function (Hursh and Silberberg, 2008. Psychological Review, 115, 186–198) gave an essential value that increased (i.e., α decreased significantly) as magazine duration decreased. This was not as predicted, since α should be constant over variations in magazine duration, but is similar to previous findings using a similar procedure with different food qualities (hens) and food quantities (rats)

New technology and desired skills of early career accountants

Purpose: Technological advances have led to accounting roles shifting from transaction focussed tasks to using data generated by technology to inform stakeholder strategies, resulting in changing skill requirements. This study aims to investigate how early career accountants (ECAs) and organisations value different skills among ECAs, how technology is impacting on these skills and the preparedness of ECAs for future technological work in different organisational settings. Design/methodology/approach: The research adopted a multi-stakeholder, mixed-method approach, surveying 315 ECAs and 175 managers/recruiters and interviewing 10 from each group. The sample drew from different industry sectors and organisation types in Australia, with all states represented. Findings: There was broad agreement among ECAs and managers on requisite skills for technology. Most ECAs and managers believed new technology is influencing the skills required in accounting, yet the impact was considered greater among ECAs and effects varied by organisational setting. Overall, the research did not support ECAs as “digital natives” and illuminated the importance of exposure to technology, a change mindset and lifelong learning to better prepare them for new technology. Originality/value: This study makes an important contribution to understanding how and why skills for success in accounting are evolving in the context of new technology and how prepared ECAs are for technology from both their own and managers/recruiters’ perspectives. It highlights the need for greater dialogue, benchmarking and evaluation of performance in technology-related skills among new accountants and their managers. Further, it identifies areas where ECAs would most benefit from targeted support, aiding personal career success and organisational competitiveness

Towards a Sociological Understanding of Irish Travellers: Introducing a People

This paper is one in a series of three papers viewing aspects of native cultures and, in this instance, will primarily define the Traveller population in Ireland, give a brief history of this population whilst discussing racism and some of its implications. There will be a particular focus on current systems of health, education and child protection in order to determine Traveller experiences of these key child and youth care related service providers in Ireland. The second paper will focus upon an examination of the experiences of aboriginal people in Canada. It will have a particular emphasis upon the marginization of aboriginal children and youth within the dominant culture. The third paper will be a comparison of the issues experienced by Traveller and Canadian aboriginal populations in terms of the helping systems. Although the culture/lifestyle of Irish Travellers is very well researched nationally, this commentary analysis seeks to provide North American readers with an introduction to Irish Travellers. However, it does so in the context of unity and diversity given that Ireland is fast approaching becoming a multi-cultural society. What is unique about the Traveller position in Irish society as opposed to other ethnic minorities is that Travellers, although native to Ireland, have a distinct but intertwined cultural history with that of the Settled population in Ireland. Although the gauntlet of unity and diversity is socially thrown down, the practical application of this through child and youth care institutions advocating multiculturalism is not being adequately achieved. The Traveller population continues to experience a social reality of marginalisation and discrimination, which has particular implications for Traveller youth and children as it defines the parameters of their socialisation

MEMS 411: Rock Collection Rover, Group

The following report has been prepared for MEMS 411 Mechanical Engineering Design Project and contains information pertaining to the selected project, the Rocker Collecting Rover Contest project. The project required the team to construct a battery-powered, remote-controlled rover that is operated with a first-person camera and can collect “rocks” and hold them off the ground without damaging them. The rover will compete in a competition against all other groups to see which group can collect the most rocks in a five-minute period

Perceptions and experiences of career success among aspiring and early career accountants and the role of organisational support

Positive perceptions of career success are critical among accounting professionals, given their connection with performance, turnover and organisational commitment. Drawing on career stage theory, this study explores the perceptions and experiences of career success among 475 aspiring (Accounting/Finance students), 305 early career accountants (ECAs) and 165 managers/recruiters in Australia. Findings reflected both objective and subjective dimensions of career success alongside notable differences between aspiring accountants and ECAs, highlighting shifting views across the career stages of exploration and establishment. While ECAs were largely positive about their access to career success, managers/recruiters identified ways to create further opportunities for ECAs\u27 career success

The future of accounting talent: Career values, choices and satisfaction among early career accountants

Amid a global war for accounting talent, this paper extends our understanding of early career accountants’ (ECAs) career values and the alignment between their career expectations and experiences when entering the profession. Drawing on survey data from 305 ECAs and 165 managers/recruiters of ECAs in Australia, the paper uses social cognitive career theory and person–organisation fit theory to explore the dynamic interplay between individual and contextual factors and career values, career choices and subsequent career satisfaction. The findings emphasise the importance of both intrinsic, and to a lesser extent extrinsic, career values for ECAs, with variations by gender and organisation setting. ECAs and managers identified different perceptions of attractors to diverse organisational settings. While ECAs were generally satisfied with their careers, satisfaction varied by organisation type. Intrinsic career values were positively associated with ECAs’ career satisfaction, along with age and closer alignment between career expectations and experiences. Our analyses suggest implications for the recruitment and retention of new accounting talent and calls to engage with individual and contextual influences on career values, experiences and satisfaction. Specifically, the paper highlights how different organisations can tailor their strategies to better attract and retain early career accountants to support more sustainable careers