Crossing Bowen Street : mapping interventions in the classed subject

Synopsis: Crossing Bowen Street Crossing Bowen Street is an extended novel set in Melbourne, Australia. The protagonist, Meg Flanagan, is accepted to teachers' college. Meg is 24 years old and has worked, and lived out of home, since 17. Having completed her year 12 studies part time while working, she has applied to the Melbourne State College for a Bachelor of Education. Melbourne State College is subsequently 'amalgamated'A into Philip University, the original 19th century sandstone institution which borders MSC. Meg has worked as a medical secretary prior to commencing her studies. An only child, she is the first member of her family to go to university, indeed to finish high school. Tertiary study is exciting for Meg and the novel explores the psychic journey as well as the intellectual one, as Meg experiences challenges to the possibilities for her life and the trajectory along which she once assumed it would flow. The narrative is told through episodic and epistolary forms, with particular periods in Meg's cultural and academic life forming the focus, picking up the integral elements of her journey and examining the psychic context and action. Characters in the undergraduate chapters of the novel are somewhat transient, although very important to Meg's rapidly developing, changing sense of herself. The constant 'trying out' of ways of being and even lifestyles sees Meg losing old 'friendships' and making new, even temporary, ones all the time. This allows the opportunity for Meg to explore her feelings about connecting to others and the nature of her relationships. The Meg reflected back to her by others is of constant interest to her, particularly as she is frequently reminded that others see a very different Meg than she does. The novel commences at the outset of Meg's tertiary career, as she initially articulates the extent of her aspiration, of her sense of the possibility of her own life. Each vignette deals, chronologically, with an aspect of Meg's expanding sense of possibility, socially, emotionally, intellectually. Certain vignettes explore her relations with friends and acquaintances in the course, which in turn provide A In 1988, Federal Labor Minister for Education John Dawkins, devised a plan to end the streaming of Australian tertiary institutions and created what is called the Unified National System. This meant that colleges of advanced education and institutes of technology were either created universities in their own right, or more commonly, merged with an appropriate existing university. This process allows a fascinating insight into the class dimensions of hierarchies and stratifications. The need of universities and their members for status has been profoundly underscored. the background and context for her sexual relationships. That aspect of her developing subjectivity provides a marked contrast, which Meg uses as leverage, when set against her sense of herself as a scholar and her growing notion of entitlement, which allows her to 'choose', where previously she believed she had no choice; the choice is a scholarly career. Within all this, Meg discovers and is deeply empowered by certain political left, and feminist, discourses within the university community. She is equally dismayed and alienated by other feminist practices; her growing engagement with her own agency sees her quickly abandoning feminist subject positions previously dear to her, which served a particular purpose and are now superseded. This notion of feeling betrayed by the promise of a value system (or rather, its practitioners) will recur throughout the action of the novel, as Meg moves into an academic role, first as doctoral student and then as academic, seeking to live her values as practice and to remain true to what her trajectory has taught her. This is crystallised in the novel as the role played by the place she came from, and how that informs, and complicates, who she becomes. The novel seeks to explore the fundamental contradictions in doing so, through Meg's increasing awareness that the academy is not the harmonious, class aware institution she has idealised, but a world driven by status and hierarchies. This realisation must be reconciled in the light of Meg's anxieties about her working-class background. Meg's doctoral training at an elite university underscores her developing sense of what constitutes excellence and the role played by highly influential conservative institutions in maintaining social arrangements. As her academic career unfolds, the holding of a Cambridge PhD allows Meg opportunities to make change as certain privileges are afforded her by virtue of her Cambridge status. Yet it is this very notion that she seeks to challenge. Her growing passion for the State University of Victoria, an institution developed for the education of working-class people, informs her activism within the academy. Why are excellence and equity polarised? Why does the institution matter more than the scholarship? Why is so much practice within universities contrary to the values scholars often claim? These questions are explored through the dynamics of academic working life as student and later as a teacher at a university with an explicit equity agenda. The Start of the End (2003): The action commences on a late Friday after at SUV, when the Department of Communication & Cultural Studies has just been advised of Meg's promotion to Associate Professor. This vignette sees the initial soiree and celebrations and allows Meg to reflect on her experience. As her colleagues and friends are congratulating her, a particular student comes looking for Meg. It is clear that Angela Watson needs course advice particularly from Meg. Their discussion seems a straightforward one on the face of it, but it underscores many things; that Meg has come the full circle in her academic life, and what it is that her journey has really been about. The route to professorial appointment is considered, as is the source of Meg's greatest professional joy and fulfillment; is it scholarship, followed by leadership, in her discipline? It is knowing she has continued to speak and act to change the life chances of all students, wherever possible? Or is it the subtle distilling of both of these, along with the knowledge which emerges from the nexus of teaching and research. That scholarship, new knowledge, surely must be taking us somewhere specific in relation to others? The more we know, the more we can do...to what end? From this reflection, we see the action of the novel unfold. We return to this scene at the end of the novel, as Meg considers the trajectory of her life and its themes in her work. The novel ends as she is faced with the next challenge. Arrival (1989): Acceptance sees Meg as she is attempting to transform her life and create a new one. She has just been advised of her admission to an undergraduate Bachelor of Education program, at the major Melbourne teachers' college. Meg shares her rented home with her high school best friend, Anna, and her fiance, Jason, who appears to be superfluous in her life. Meg is aware he is a partner for who she used to be. We see Meg in her job as a medical secretary and this allows the mapping of Meg's sense of her own world, as she travels between home and work. This first stage of seeking her aspiration- to be an English teacher-evolves. As Meg considers the meaning of what she is about to do and how she knows it is right. This involves a consideration of what work means in our lives and how this is different for jobs according to how they are classed. Her relationship with the life she has known, the person she has been, is changing and this change is represented through her relationship with Jason. Meg's first day at teachers' college demonstrates that she is in a constant, often painful, dialogue with herself. The difficulties she encounters in making sense of the relation between her two 'lives' are thrown into sharp relief. The preparation for college sees Meg interrogating herself about how she can be different. Her initial experiences at the College resonate with her highest expectations of the life that awaits her, of the multiple possibilities currently being authored for her. Her first attendance at classes offers the opportunity to try out some of those possibilities, to test them against those she meets and to map the ways she could discover to 'be'. There is much tension and fear, but also endless excitement and these conflicting emotional states parallel and marble each other. It is on this day that she meets Jennifer Wren, her first real friend at university, who offers so many challenges to Meg. Their friendship involves a constant exhausting shift of subject positions, which Meg is able to look back on with affection in years to come. Going Bowling (1989): within a few weeks of commencing at university, Meg is socializing with some of her new friends, having neatly segmented her home and college lives. Meg has already realised that her friendships fall into separate groups; her friendship with Jennifer and the people Jennifer knows does not find its way into this group. They meet in the city to go bowling and have a meal. While Meg really enjoys these new people, already tensions are developing in relations between the group. Their unofficial leader, Rosemary Marshall, has a tendency to seek control and already resistance is showing. Rosemary particularly does not like Jennifer. Meg is enjoying her flirtation with Pete Danville, whom she has assumed to be gay. His very flattering attention has already developed Meg's confidence and stoked her ego, which has eroded in her stagnating relationship with Jason. Rosie has developed a crush on Pete and seems to take the flirtation with Meg personally. Dynamics in the group become slightly uncomfortable but Meg has grown quickly fond of her new friends, especially flamboyant Marina, another whom Rosemary seems to dislike. The discussions which occur during their evening deepen both the relationships and the tensions between them and draw lines which will determine the outcome of their various friendships. The Ball (1990): In the third year of her degree, much has happened to Meg. She is married to Jason, although she omits him from much of her psychic (and practical) life. Meg and her friends attend the Faculty's annual formal dinner dance. Meg has so far managed to balance the competitiveness which occurs between all of them, both academically and personally. The negotiation of her respective friendships with Jennifer and Marina requires a great deal of diplomacy; the subtext in this is very disturbing to Meg. What exactly is the conflict about? She can't be sure why they don't like each other; it could be Marina's smoking, or Jennifer's confidence to spare, but these things also annoy her, yet she does not fight with either girl as they do with each other. Rose has always insisted that the problem is Jennifer's private school background, but Marina went to a catholic girls' school, so what could the difference be? The ball is initially a happy occasion; the girls dress up and they dance and drink champagne together with the boys. But dynamics operating beneath the surface force their way up. Rosie is ready to force Pete to confront her continuing crush on him; Pete confronts Meg about their ongoing flirtation. Meg gives in and admits to herself for the first time that she does want to be with Pete. He is grown up and exciting and strong. He offers her something she has never had with Jason. Married less than a year, she pushes her husband out of her thoughts. The events of the ball force Meg to confront the differences between all her friends and the discomfort this affords everyone. Rosie's continued need for control over the group is acknowledged. Future Present (1991): Meg lives in Carlton with Pete. This is the busiest year thus far in her academic career and the financial, academic and emotional pressure is showing. This vignette gives us the range of Meg's academic activities and the way her life has fallen since the events at the ball eight months earlier. We see Meg grappling with her own evaluation of the changes in her 'way of being'; trying on different ways of living that she has idealised and finding them just as wanting as the last. Meg faces some key existential questions in this vignette and seeks answers which she finally discovers only she can give. Her relationship with Pete, the values and goals they share (and don't share) are thrown into sharp relief and provide a touchstone for the clearer determination of Meg's aspiration and future. Her relationship with various female friends is also revisited and this offers insight into Meg's constant checking of herself against idealised female templates. There is a crisis of identity and strength which constitutes an important fork in Meg's road. Beyond (1992): Beyond sees Meg determinedly seeking ways she can progress towards her goal, while still constantly checking against herself that postgraduate study (let alone a scholarly life) is available to her. We accompany Meg as she seeks and locates the academic path she wants; this is the backdrop for her further psychic exploration of the women who intimidate yet fascinate her, particularly Heloise Waul, who is a significant influence through Meg's postgraduate career. The sites in which Meg's personal struggles manifest are highlighted in this vignette, particularly in terms of dress and cultural pursuit. The conversations between Meg and Heloise also allow an exploration of the feminist politics of that milieu and the class tensions which operate tacitly within those politics. Bound to the Caucus (1992); Meg has now nearly completed her undergraduate degree and has been active for some time in university life and student politics. Her feminist and socialist education is well advanced. Bound to the Caucus shows us Meg in her student politics world for the first time, where the segue of her activism and academic life have taken her. Meg has found female friends who understand that part of her which struggles with inadequacy, although at this point in the novel this common struggle is not well understood or articulated. It is in this vignette that Meg admits her growing attraction for a Liberal student activist, Stuart Noble; this proscribed liaison raises many questions about values and aspiration, as well as the dominant sexual politics of the time and place. Bound to the Caucus also offers insight into the student activism occurring at universities like Philip in the early 1990s. Divergence (1993): Set in 1993, Meg is now in the early weeks of her honours program, although she has been at work on her thesis on the poet William Blake for some months. Living unhappily in a share household near the University, her relationship with Stuart Noble continues to develop, reaching a crisis point in this period. These events occur in the context of Meg's activist career in the Student Left, particularly as she encounters issues of identity around her class, feminism and difference amongst Left women. While Meg fights these battles passionately in an intense milieu, she considers them emotionally in terms of her changing sense of herself. Meg is increasingly aware that the personal impact of her class is changing for her. Additionally, she explores her relation with a 'boyfriend' of right wing political affiliation; Meg comes to recognise that this relationship is undermining her sense of herself in a way that her relationships with women in the left previously did. Honour Roll (1993): Meg is now undertaking honours and this vignette opens with Meg seeing the honours coordinator, Professor Michaela Moore, who approximates all those apparently middle-class traits to which Meg has such a push-pull relation. We see the return of a chapter of the honours thesis, discussion of the content and the constantly shifting subject positions these experiences offer Meg. This vignette also directly introduces Agnes. Mia and Agnes meet Meg after her supervision and this conversation allows very distinct if tacit class themes to develop. Meg has warmed quickly to Agnes, who is unlike anyone she has known; they have much in common in relation to their work and this binds them. Mia continually presents a viewpoint which irritates Meg, in relation to entitlement: to academic life, to funding, even to questioning how these things are enabled. Honour Roll allows us to see Meg's flourishing theoretical and intellectual life and its role in assisting her emotionally as she re-frames the same conundrums that previously constituted obstacles. The Cusp (1993): Meg's developing friendship with Agnes offers her enormous insights into difference and her developing sense of self and aspiration. While the girls come from diametrical backgrounds, they are united by their passion for their research and scholarly work. Meg is increasingly self-conscious through their discussions in terms of how she has seen herself and allowed herself to dream and seek. Cusp is set at the end of the honours year, prior to the release of results. Meg and Agnes explore their feelings about academia and this leads to discussions of purpose and the role of class within that. This vignette also documents Meg's growing social confidence and those aspects of herself which have become so sure to her, that she no longer considers them at all. Whom (1996): [Not included in this abridged edition]. Set at Cambridge, two thirds into Meg's doctorate, Whom shows Meg in the mental space which will take her back to Melbourne and the State University of Victoria. Having risen to the challenge of doctoral study, she is confronted now by deeper demons, and the need to explore and challenge them in the ambivalent context of Cambridge, which so excites her still, but which has proved empty of the profoundly held higher ideals she expected to see reflected. Set in the midst of Meg's doctoral study, this vignette is dramatically abridged in the submission novel. The importance of Whom lies in its concern with Meg's rapidly shifting sense of herself and her own scholarly subjectivity and the changes to these that the culture of Cambridge has wrought. By the second year of her PhD Meg is crystal clear about her goals and decides to spend the long break at home, rather than travelling, because she wishes to 'touch base' with her future. The action described segues into that in Courting the Enemy. Whom describes Meg's ambivalent and contradictory but passionate feelings about Cambridge. Whom demonstrates Meg's increasing anger at the status and privilege to which her education now automatically admits her, and her need to find some sort of stasis and safety in her emotional life. In this vignette, Meg meets her life partner, Jeremy McCallum (I have intentionally reduced the attention in the novel to Meg's romantic life as she matures into her career). Courting the Enemy (late 1990s): By this time, Meg is a senior lecturer in English at the State University of Victoria, which was established in the nineteenth century as the Worker's College. This vignette starts with Meg's attendance at a University Committee which is considering a transformation in relation to equity in admissions policy. Meg was drawn to SUV because of its transparent and determined commitment to educate the children of working-class people. An attack on the equity admission policy of her university galvanizes Meg and some of her colleagues. The action of the vignette considers the role of the scholar, and of such an institution as SUV, in the light of daily academic life. This vignette is primary in its demonstration of the themes of the novel. In the unabridged version, I took the opportunity to illustrate some of the vast range of administrative, intellectual and even physical demands on a senior scholar in the routine of academic life. In placing Meg in this context, I sought to highlight how a scholar of her values and commitment makes sense of the constantly shifting terrain of her working world and how this continually informs her practice. This vignette is also significant for its retrospective description of Meg's employment at SUV some years earlier. Locus: (1995). This piece of writing stands apart from the rest of the novel. I wished to write in a reflective voice, which might be from Meg's journal, were it not in the (omniscient) third person, in order to consider the headspace and meaning-making which occurs as Meg settles into Cambridge, and the lifestyle her situation allows her. Locus is a deeper engagement with Meg's sense of her identity. It considers the impact on her of the physical journeys she must make to match those of her psyche. These are thoughts too personal for a letter, even to Anna. Meg is exploring her ever shifting self and the growth in her self-belief allows her to explore what is rage; that she was bounded by illusions about her worth. Locus seeks to allow some context for Meg's anger at the role Cambridge plays. I seek to create the space in which Meg's dawning self understanding will lead her to her next, driven, purpose. Letters: throughout the novel letters are used to reveal and inform Meg's relationship with her family. This is an intentional device to distance the birth family in an attempt to blur and muddy an assessment of Meg's class through traditional measures. The letters between Meg and Aunty Jean particularly reveal much of the classed emotional antecedents of Meg's life. There are also letters exchanged with Meg's high school best friend, Anna, who has moved to the country and a very different lifestyle. Meg writes to Anna often, using the acceptance she feels in the friendship and her sense that Anna understands her, to touchstone her own emotional growth. Formal letters from institutions ring changes in settings and mark significant points in the geographical and academic trajectory of the character. All the letters serve to introduce time and event changes consistent with the episodic style of the narrative.

Natriuretic peptides : do they regulate water balance in desert-adapted rodents?

This research determined how the natriuretic peptide system, which controls water and salt balance, responds to water limitation in a desert rodent. It was found that a uniform down-regulation of the system is not part of the physiological response to minimise water loss during periods of low water availability.

Water and ion channels : crucial in the initiation and progression of apoptosis in central nervous system?

Programmed cell death (PCD), is a highly regulated and sophisticated cellular mechanism that commits cell to isolated death fate. PCD has been implicated in the pathogenesis of numerous neurodegenerative disorders. Countless molecular events underlie this phenomenon, with each playing a crucial role in death commitment. A precedent event, apoptotic volume decrease (AVD), is ubiquitously observed in various forms of PCD induced by different cellular insults. Under physiological conditions, cells when subjected to osmotic fluctuations will undergo regulatory volume increase/decrease (RVI/RVD) to achieve homeostatic balance with neurons in the brain being additionally protected by the blood-brain-barrier. However, during AVD following apoptotic trigger, cell undergoes anistonic shrinkage that involves the loss of water and ions, particularly monovalent ions e.g. K+, Na+ and Cl-. It is worthwhile to concentrate on the molecular implications underlying the loss of these cellular components which posed to be significant and crucial in the successful propagation of the apoptotic signals. Microarray and real-time PCR analyses demonstrated several ion and water channel genes are regulated upon the onset of lactacystin (a proteosomal inhibitor)-mediated apoptosis. A time course study revealed that gene expressions of water and ion channels are being modulated just prior to apoptosis, some of which are aquaporin 4 and 9, potassium channels and chloride channels. In this review, we shall looked into the molecular protein machineries involved in the execution of AVD in the central nervous system (CNS), and focus on the significance of movements of each cellular component in affecting PCD commitment, thus provide some pharmacological advantages in the global apoptotic cell death.

A Pseudomonas aeruginosa toxin that hijacks the host ubiquitin proteolytic system

Pseudomonas aeruginosa (P. aeruginosa) is an opportunistic pathogen chronically infecting the lungs of patients with chronic obstructive pulmonary disease (COPD), pneumonia, cystic fibrosis (CF), and bronchiectasis. Cif (PA2934), a bacterial toxin secreted in outer membrane vesicles (OMV) by P. aeruginosa, reduces CFTR-mediated chloride secretion by human airway epithelial cells, a key driving force for mucociliary clearance. The aim of this study was to investigate the mechanism whereby Cif reduces CFTR-mediated chloride secretion. Cif redirected endocytosed CFTR from recycling endosomes to lysosomes by stabilizing an inhibitory effect of G3BP1 on the deubiquitinating enzyme (DUB), USP10, thereby reducing USP10-mediated deubiquitination of CFTR and increasing the degradation of CFTR in lysosomes. This is the first example of a bacterial toxin that regulates the activity of a host DUB. These data suggest that the ability of P. aeruginosa to chronically infect the lungs of patients with COPD, pneumonia, CF, and bronchiectasis is due in part to the secretion of OMV containing Cif, which inhibits CFTR-mediated chloride secretion and thereby reduces the mucociliary clearance of pathogens.

High volume versus low volume balance training on postural sway in adults with previous ankle inversion injury

Balance training is commonly used in the rehabilitation process of ankle injuries; however, the exercise prescription guidelines for prescribing balance training are poorly understood. The aim of the present study was to determine if high or low volume balance training is more effective in improving postural sway after an 8 week balance training program utilising the same exercises. Seventeen subjects (14 male, 3 female) with a mean age of 24.06 ± 5.6 years were randomly allocated into a control group (CG), low volume training (LVT) or high volume training (HVT). All subjects had sustained at least two inversion ankle injuries within the last 18 months. Subjects completed 8 weeks of balance training of up to 30 mins duration, 3 times per week. LVT consisted of 40 repetitions for week 1, progressing to 90 repetitions by week 8. HVT consisted of 60 repetitions for week 1, progressing to 130 repetitions by week 8. The maximum centre of pressure (COP) excursion was obtained from the porce plate in the medial-lateral (ML) direction and subsequently used for pre-test and post-test analysis. After the 8 week training intervention, there was a significant (P<0.001) difference in postural sway between pre and post testing for both the LVT (pre = 88.69mm ± 25.08mm, post = 72.17mm ± 27.53mm) and HVT (pre = 77.47mm ±10.57mm, post = 58.54mm ± 7.01mm) groups. There was no significant (P>0.01) difference detected for improvements between the LVT and HVT, however reported effect sizes (ES) showed large effect size chances in the high volume training (ES = 1.7) whereas low volume training showed medium effect sizes changes (ES = 0.6). This preliminary study demonstrates the importance of training volume in the rehabilitation of ankle injuries, with the HVT being superior to LVT.

Performance evaluation of e-government services using balance scorecard : an empirical study in Jordan

Purpose - the purpose of this paper is to emphasise on a balance between quantitative and qualitative measures, and examine the use of Balanced Scorecard to evaluate and estimate the performance of information and communication technologies (ICT) in delivering valuable e-government services through the internet. Design/methodology/approach - This study tests the hypotheses of e-government effectiveness using Balanced Scorecard technique by incorporating qualitative measures within a quantitative research methodology with data collected by means of a survey questionnaire. The survey sample of 383 stakeholders includes common customers, employees of e-government, and employees from the IT sector. The survey data were analysed to test the hypothesis in measuring e-government effectiveness from Balanced Scorecard's four dimensions: customer perspective, financial perspective, internal business process perspective, and innovation and learning perspective. Findings - The results show that the Balanced Scorecard factors fit very well with monitoring and measuring the performance of e-government in Jordan, and also in evaluating their success in IT project investments. Originality/value - This study attempts to address this gap in the literature and would benefit future studies in applying Balanced Scorecard for performance evaluation of various IT projects that are gaining huge investments from governments and organisations .

Effects of load modeling in power distribution system with distributed wind generation

This paper presents the impact of different types of load models in distribution network with distributed wind generation. The analysis is carried out for a test distribution system representative of the Kumamoto area in Japan. Firstly, this paper provides static analysis showing the impact of static load on distribution system. Then, it investigates the effects of static as well as composite load based on the load composition of IEEE task force report [1] through an accurate time-domain analysis. The analysis shows that modeling of loads has a significant impact on the voltage dynamics of the distribution system with distributed generation.

The International Society for Bipolar Disorders (ISBD) Task Force report on the nomenclature of course and outcome in bipolar disorders

Objectives:  Via an international panel of experts, this paper attempts to document, review, interpret, and propose operational definitions used to describe the course of bipolar disorders for worldwide use, and to disseminate consensus opinion, supported by the existing literature, in order to better predict course and treatment outcomes. Methods:  Under the auspices of the International Society for Bipolar Disorders, a task force was convened to examine, report, discuss, and integrate findings from the scientific literature related to observational and clinical trial studies in order to reach consensus and propose terminology describing course and outcome in bipolar disorders. Results:  Consensus opinion was reached regarding the definition of nine terms (response, remission, recovery, relapse, recurrence, subsyndromal states, predominant polarity, switch, and functional outcome) commonly used to describe course and outcomes in bipolar disorders. Further studies are needed to validate the proposed definitions. Conclusion:  Determination and dissemination of a consensus nomenclature serve as the first step toward producing a validated and standardized system to define course and outcome in bipolar disorders in order to identify predictors of outcome and effects of treatment. The task force acknowledges that there is limited validity to the proposed terms, as for the most part they represent a consensus opinion. These definitions need to be validated in existing databases and in future studies, and the primary goals of the task force are to stimulate research on the validity of proposed concepts and further standardize the technical nomenclature.

Characteristics and applications of energy storage system to power network - A review

Maintaining reliability and stability of a power systems in transmission and distribution level becomes a big challenge in present scenario. Grid operators are always responsible to maintain equilibrium between available power generation and demand of end users. Maintaining grid balance is a bigger issue, in case of any unexpected generation shortage or grid disturbance or integration of any renewable energy sources like wind and solar power in the energy mix. In order to compensate such imbalance and to facilitate more renewable energy sources with the grid, energy storage system (ESS) started to be playing an important role with the advancement of the state of the art technology. ESS can also help to get reduction in greenhouse gas (GHG) emission by means of integrating more renewable energy sources to the grid. There are various types of Energy Storage (ES) technologies which are being used in power systems network from large scale (above 50MW) to small scale (up to 100KW). Based on the characteristics, each storage technology has their own merits and demerits. This paper carried out extensive review study and verifies merits and demerits of each storage technology and identifies the suitable technology for the future. This paper also has conducted feasibility study with the aid of E-SelectTM tool for various ES technologies in applications point of view at different grid locations. This review study helps to evaluate feasible ES technology for a particular electrical application and also helps to develop smart hybrid storage system for grid applications in efficient way.

A touching movement : force control turns machining robots into universal tools

ABB has written a new chapter in the book of robot applications. While in the past it had been a tedious and time-consuming effort to program a robot for delicate fine-tuning operations, robots can now learn how to best manage such tasks themselves. This innovative approach can reduce overall programming times by up to 80 percent for robots used to grind castings, vastly improving productivity levels. With ABB’s new Flex Finishing system featuring RobotWare Machining FC (force control), one of the last real barriers to productivity improvement in this sector has been lifted.

Formations of robotic swarm: an artificial force based approach

Cooperative control of multiple mobile robots is an attractive and challenging problem which has drawn considerable attention in the recent past. This paper introduces a scalable decentralized control algorithm to navigate a group of mobile robots (swarm) into a predefined shape in 2D space. The proposed architecture uses artificial forces to control mobile agents into the shape and spread them inside the shape while avoiding intermember collisions. The theoretical analysis of the swarm behavior describes the motion of the complete swarm and individual members in relevant situations. We use computer simulated case studies to verify the theoretical assertions and to demonstrate the robustness of the swarm under external disturbances such as death of agents, change of shape etc. Also the performance of the proposed distributed swarm control architecture was investigated in the presence of realistic implementation issues such as localization errors, communication range limitations, boundedness of forces etc.

A genetic fuzzy system to model pedestrian walking path in a built environment

A study on the pedestrian's steering behaviour through a built environment in normal circumstances is presented in this paper. The study focuses on the relationship between the environment and the pedestrian's walking trajectory. Owing to the ambiguity and vagueness of the relationship between the pedestrians and the surrounding environment, a genetic fuzzy system is proposed for modelling and simulation of the pedestrian's walking trajectory confronting the environmental stimuli. We apply the genetic algorithm to search for the optimum membership function parameters of the fuzzy model. The proposed system receives the pedestrian's perceived stimuli from the environment as the inputs, and provides the angular change of direction in each step as the output. The environmental stimuli are quantified using the Helbing social force model. Attractive and repulsive forces within the environment represent various environmental stimuli that influence the pedestrian's walking trajectory at each point of the space. To evaluate the effectiveness of the proposed model, three experiments are conducted. The first experimental results are validated against real walking trajectories of participants within a corridor. The second and third experimental results are validated against simulated walking trajectories collected from the AnyLogic® software. Analysis and statistical measurement of the results indicate that the genetic fuzzy system with optimised membership functions produces more accurate and stable prediction of heterogeneous pedestrians' walking trajectories than those from the original fuzzy model. © 2014 Elsevier B.V. All rights reserved.

Depression prevention, labour force participation and income of older working aged Australians: a microsimulation economic analysis

Depression has economic consequences not only for the health system, but also for individuals and society. This study aims to quantify the potential economic impact of five-yearly screening for sub-syndromal depression in general practice among Australians aged 45-64 years, followed by a group-based psychological intervention to prevent progression to depression.

Variation of phloem turgor pressure in Hevea brasiliensis: An implication for latex yield and tapping system optimization

Phloem turgor pressure (PTP) is the initial driving force for latex flow after a rubber tree is tapped and therefore plays an important role in rubber tree latex production. Variation in PTP with rubber tree clone, age, yield potential and commonly used Ethrel (an ethylene releaser) stimulation have, however, not been comprehensively studied to date. The aim of this study was to investigate these relations and examine whether PTP can be used as an index for rubber tree clone assessment and tapping system optimization. The results showed that: (1) the daily change of PTP in the foliation season suggests that a high PTP can ensure a high latex yield and tapping could be moved forward to midnight or earlier in the night; (2) the decrease of PTP from the basal to distal stem indicates the benefit of a controlled upward tapping system; (3) the logarithmic increase in PTP with rubber tree planting age and age-based mean girth suggests that the preferred age for the commencement of rubber tree tapping is eight years; (4) the change of PTP with regenerated bark age suggests that the regenerated bark could be exploited again after the second year; (5) PTP is positively related to the yield potential of rubber tree clones; (6) although Ethrel stimulation could not significantly increase the initial PTP of a rubber tree, it delays the recovery of PTP after tapping. Therefore, PTP is an indicator of rubber tree latex yield and can be used for tapping system optimization. © 2014 Elsevier B.V.