102 research outputs found

    From fragmentation to a new wave : identity and citizenship in feminist theory

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    This thesis will argue that feminism is at the edge of a new wave brought about by the fragmentation of the feminist political movement and the rise of postmodern theory. It contends that postmodern theories have been used by feminists as a 'critical strategy' to understand why the movement fragmented and to move towards the acceptance of more strategic and conventional politics. Thus many feminists are now prepared to leave behind the utopian and separatist legacies of the second wave. These feminists are willing to consider how a future feminist movement can be built that will account for the differences between women, and realise that there will thus need to be a painful and precarious process of alliance-building. It is argued that given the precarious nature of the alliance, feminists in a new wave must also re-conceive democratic models of citizenship to ensure that women and feminists' concerns are met in the wider political sphere. This second concern also makes sure that they have institutional and procedural support should fragmentation recur. The thesis considers three such models of citizenship: Seyla Benhabib's deliberative model, Iris Young's communicative model and Chantal Mouffe's agonal one. It contends that these models only partly address the concerns of new wave feminism, because they are based on transformative and participatory models of politics. These models undermine the importance of feminists finding legitimate political relationships that respect the multiplicity of their demands as feminists, as women and as citizens. This thesis concludes that representative models of democracy are more suited to feminist concerns in a new wave. Such models have distinctive characteristics that allow women to be politically included in terms of a range of political concerns and identities. Representative models of democracy, moreover, make it clear that the political relationship is one of formal authorisation and not one of personal identity recognition and transformation

    Local Bus Deregulation and Timetable Instability

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    This paper presents a model of competition between operators on urban local bus routes in which passengers always board the first bus to arrive, and it is costly to revise timetables. The model predicts that timetables are unstable, the operator whose bus was boarded by fewest passengers is the most likely to change its arrival time, and to try to leapfrog its rival by arriving just before, and that there is a tendency for bus arrival times to be clustered together. These predictions are consistent with observed features of the on-the-road competition on urban local bus routes. On express coach routes, where passengers are more likely to research departure times before travelling, and to arrive at the coach station in order to catch their preferred coach, instability does not arise in the model, and has not been noted as a feature of competition in practice.Bus deregulation, instability, urban bus routes, timetables, competition.

    Local bus deregulation and timetable instability

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    This paper presents a model of competition between operators on urban local bus routes in which passengers always board the first bus to arrive, and it is costly to revise timetables. The model predicts that timetables are unstable, the operator whose bus was boarded by fewest passengers is the most likely to change its arrival time, and to try to leapfrog its rival by arriving just before, and that there is a tendency for bus arrival times to be clustered together. These predictions are consistent with observed features of the on-the-road competition on urban local bus routes. On express coach routes, where passengers are more likely to research departure times before travelling, and to arrive at the coach station in order to catch their preferred coach, instability does not arise in the model, and has not been noted as a feature of competition in practice

    Douglas flight deck design philosophy

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    The systems experience gained from 17 years of DC-10 operation was used during the design of the MD-11 to automate system operation and reduce crew workload. All functions, from preflight to shutdown at the termination of flight, require little input from the crew. The MD-11 aircraft systems are monitored for proper operation by the Aircraft Systems Controllers (ASC). In most cases, system reconfiguration as a result of a malfunction is automated. Manual input is required for irreversible actions such as engine shutdown, fuel dump, fire agent discharge, or Integrated Drive Generator (IDG) disconnect. During normal operations, when the cockpit is configured for flight, all annunciators on the overhead panel will be extinguished. This Dark Cockpit immediately confirms to the crew that the panels are correctly configured and that no abnormalities are present. Primary systems annunciations are shown in text on the Alert Area of the Engine and Alert Display (EAD). This eliminates the need to scan the overhead. The MD-11 aircraft systems can be manually controlled from the overhead area of the cockpit. The center portion of the overhead panel is composed of the primary aircraft systems panels, which include FUEL, AIR, Electrical (ELEC) and Hydraulic (HYD) systems, which are easily accessible from both flight crew positions. Each Aircraft Systems Controller (ASC) has two automatic channels and a manual mode. All rectangular lights are annunciators. All square lights are combined switches and annunciators called switch/lights. Red switch/lights on the overhead (Level 3 alerts) are for conditions requiring immediate crew action. Amber (Level 2 or Level 1 alerts) indicates a fault or switch out of position requiring awareness or crew interaction. Overhead switches used in normal operating conditions will illuminate blue when in use (Level 0 alerts) such as WING ANTI-ICE - ON. An overhead switch/light with BLACK LETTERING on an amber or red background indicates a system failure and that crew interaction is required. A switch/light with blue or amber lettering and a BLACK BACKGROUND indicates a switch out of normal position and that crew action is necessary only if the system is in manual operation

    It\u27s The Place Where Shamrock Grows

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    https://digitalcommons.library.umaine.edu/mmb-vp/5699/thumbnail.jp

    Isolation and characterisation of esterases from thermophilic Actinomyces

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    Magister Scientiae - MScAlternative sources of fuel are required worldwide, and bio-ethanol is the leading candidate. Lignocellulosic biomass, a waste component of the agricultural industry, is a promising renewable source. Due to its complex structure it is highly recalcitrant, requiring the synergistic action of a battery of enzymes to achieve complete digestion. These enzymes include cellulases, hemicellulase and the accessory enzymes acetyl xylan esterase (AXE) and ferulic acid esterase (FAE). Thermpohilic Actinomyces isolates with the ability to hydrolyze xylan were screened for esterase activity. Two isolates (ORS10 and GSIV1), identified as Streptomyces spp, were positive for AXE activity. A cosmid library representative of isolate ORS10 was composed and screened for AXE activity using -naphthyl acetate as substrate. An 18 kb cosmid clone, 18D7, tested positive for AXE activity. Intracellular fractions extracted from ORS10 were precipitated with ammonium sulphate and partially purified 161-fold. Specific activity was measured after dialysis and ion-exchange chromatography. Overall yield of the partially purified enzyme was 34 %. Two protein bands of molecular masses 40 kDa and 60 kDa have been subjected to trypsin digestion and MALDI-TOF mass spectrometry analysis. The partially purified AXE displayed optimum activity at pH 9 and at 50°C. AXE activity was stable for at least 1.5 hours between 30°C and 40°C, and for 24 hours between pH 6-9. The kM and Vmax values were 16.93 mg/ml and 1645 units/mg enzyme, respectively. The stability of the partially purified AXE at 30°C-40°C suggests potential for industrial applications that utilise mesophilic fermentations.South Afric

    Peer Assessment of Professionalism Attributes

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    Background: Peer Assessment can support the development of professionalism by providing feedback that enables learners to reflect on their professional behavioural attributes. Approach: We developed and implemented an innovative online peer assessment and feedback tool. Students were encouraged to nominate 12 peer assessors to anonymously conduct their assessment. Assessors were presented with a list of 32 adjectives that described professional behavioural attributes within four domains (integrity, conscientiousness, agreeableness and resilience), and asked to rate the student by selecting a minimum of 2 adjectives in each domain and to provide free-text comments. The feedback was presented as a collated word cloud and free-text comments. All students had the opportunity to discuss their profile with a staff member. Evaluation: Our mixed-methods evaluation found that all students participated and they valued the peer assessment and feedback process. Although the assessment was formative and confidential, students were reluctant to provide negative comments about their peers. ‘Disengaged’, ‘Aloof’ and ‘Argumentative’ were the most likely negative adjectives that indicated students with low level professionalism concerns. Implications: Future development will focus on introducing students who can act as peer champions for the process and repeating the peer assessment over time to identify change in professionalism development

    Direct ab initio MD simulation of silver ion diffusion in chalcogenide glasses

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    In this paper, we present new models of germanium selenide chalcogenide glasses heavily doped with silver. The models were readily obtained with ab initio molecular dynamics and their structure agrees closely with diffraction measurements. Thermal molecular dynamics simulation reveals the dynamics of Ag+ ions and the existence of trapping centers as conjectured in other theory work. We show that first principles simulation is a powerful tool to reveal the motion of ions in glass.Comment: 3 pages, 3 figures, submitted to Phys. Stat. Sol. {b} Rapid Research Letter

    Granitoid rocks and associated coper skarn, Whycocomagh Mountain, Cape Breton Island, Nova Scotia

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    Mineralized (Fe-Cu-W-Mo) skarn in the Whycocomagh Mountain area is associated with a small pluton of Devonian (402±20 Ma) age, which intruded predominantly metasedimentary rocks of the Hadrynian George River Group. The pluton consists largely of granite porphyry with a marginal granodiorite to diorite zone, and minor porphyritlc granodiorite to monzodiorite dykes and pegmatite. The suite is calc-alkalic with I-type characteristics. Although weakly mineralized, the Whycocomagh Mountain pluton has features typical of plutons associated with porphyry-type Cu-Mo deposits. Calc-silicate rocks derived from marbles of the George River Group are the chief hosts for magnetlte ± chalcopyrlte ± scheelite ± molybdenite ± pyrite which occur in veinlets along fractures and as disseminated grains In adjacent alteration envelopes. Characteristics of the pluton and the skarn minerals suggest that the deposit is a copper skarn. RÉSUMÉ Un skarn minéralise (Fe-Cu-W-Mo), situe dans la région de la montagne Whycocomagh, est associé à une petite intrusion ignée d'âge Dévonien (402±20 m.a.) qui pénétre des roches, principalement des métasédiments, du groupe George River (Hadrynien). Le pluton consiste surtout en un granite porphyrique accompagne d'une zone marginale (granodiorite à diorite), de dykes mineurs (granodiorite à monzodiorite porphyrique) et de pegmatite. L'ensemble est calco-alcalln et de "type 1". Blen que faiblement minéralise, le pluton Whycocomagh Mountain possède lea caractérlstiques typiques des plutons associés aux dépôts porphyrlques de type Cu-Mo. Les calco-sflicates dérives des marbres du groupe George River sont les notes principaux du cortege for magnétite ± chalcopyrlte ± scheelite ± molybdenite ± pyrite que L’on retrouve dans des veinules le long des fractures et disséminés dans les enveloppes d'alteratlon volsines. Les caractérlstiques du pluton ainsi que la minéralogle du skarn font croire qu'il s'agit d'un dépôt de skarn cuprifère. (Tradult par le Journal
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