10 research outputs found
Finding top performers through email patterns analysis
No full textIn the information economy, individuals’ work performance is closely associated with their digital communication strategies. This study combines social network and semantic analysis to develop a method to identify top performers based on email communication. By reviewing existing literature, we identified the indicators that quantify email communication into measurable dimensions. To empirically examine the predictive power of the proposed indicators, we collected 2 million email archive of 578 executives in an international service company. Panel regression was employed to derive interpretable association between email indicators and top performance. The results suggest that top performers tend to assume central network positions and have high responsiveness to emails. In email contents, top performers use more positive and complex language, with low emotionality, but rich in influential words that are probably reused by co-workers. To better explore the predictive power of the email indicators, we employed AdaBoost machine learning models, which achieved 83.56% accuracy in identifying top performers. With cluster analysis, we further find three categories of top performers, ‘networkers’ with central network positions, ‘influencers’ with influential ideas and ‘positivists’ with positive sentiments. The findings suggest that top performers have distinctive email communication patterns, laying the foundation for grounding email communication competence in theory. The proposed email analysis method also provides a tool to evaluate the different types of individual communication styles
Harold Palmer
No full textHarold E. Palmer (1877-1949), was a London-born early twentieth century linguist, phonetician, language educator, and author of over a hundred books, research papers and monographs. A school dropout, he started work as a learner- teacher at a school in Verviers, Belgium where he taught and experimented with teaching methods, and learnt several languages, both living and artificial
Book review:Second language learning in a foreign language Environment: A pragma-discoursal account
No full textThis erudite book opens with a deceptively simple introduction in which the author puts forth the prospect of treating prose compositions as “unique modes of
packaging” which present differences in information structure/design that resultantly produce varied pragma-discoursal effects. In this compilation of nine well-researched papers published in international journals
from 2001 onwards, Asha Tickoo, explores a gamut of composing skills such as indefinite reference framing, marking of temporal passage and the structure of
enumeration, that often present a challenge to the EFL learner
Modelling the IEEE 802.11 wireless MAC layer under heterogeneous VoIP traffic to evaluate and dimension QoE
No full textPhDAs computers become more popular in the home and workplace, sharing resources and
Internet access locally is a necessity. The simplest method of choice is by deploying a
Wireless Local Area Network; they are inexpensive, easy to configure and require
minimal infrastructure. The wireless local area network of choice is the IEEE 802.11
standard; IEEE 802.11, however, is now being implemented on larger scales outside of
the original scope of usage. The realistic usage spans from small scale home solutions to
commercial ‘hot spots,’ providing access within medium size areas such as cafés, and
more recently blanket coverage in metropolitan. Due to increasing Internet availability
and faster network access, in both wireless and wired, the concept of using such
networks for real-time services such as internet telephony is also becoming popular.
IEEE 802.11 wireless access is shared with many clients on a single channel and there are
three non-overlapping channels available. As more stations communicate on a single
channel there is increased contention resulting in longer delays due to the backoff
overhead of the IEEE 802.11 protocol and hence loss and delay variation; not desirable
for time critical traffic.
Simulation of such networks demands super-computing resource, particularly where
there are over a dozen clients on a given. Fortunately, the author has access to the UK’s
super computers and therefore a clear motivation to develop a state of the art analytical
model with the required resources to validate. The goal was to develop an analytical
model to deal with realistic IEEE 802.11 deployments and derive results without the
need for super computers.
A network analytical model is derived to model the characteristics of the IEEE 802.11
protocol from a given scenario, including the number of clients and the traffic load of
each. The model is augmented from an existing published saturated case, where each
client is assumed to always have traffic to transmit. The nature of the analytical model is
to allow stations to have a variable load, which is achieved by modifying the existing
models and then to allow stations to operate with different traffic profiles. The different
traffic profiles, for each station, is achieved by using the augmented model state machine
per station and distributing the probabilities to each station’s state machine accordingly.
To address the gap between the analytical models medium access delay and standard
network metrics which include the effects of buffering traffic, a queueing model is
identified and augmented which transforms the medium access delay into standard
network metrics; delay, loss and jitter. A Quality of Experience framework, for both
computational and analytical results, is investigated to allow the results to be represented
as user perception scores and the acceptable voice call carrying capacity found. To find
the acceptable call carrying capacity, the ITU-T G.107 E-Model is employed which can
be used to give each client a perception rating in terms of user satisfaction.
PAGE 4 OF 162
QUEEN MARY, UNIVERSITY OF LONDON OLIVER SHEPHERD
With the use of a novel framework, benchmarking results show that there is potential to
maximise the number of calls carried by the network with an acceptable user perception
rating. Dimensioning of the network is undertaken, again compared with simulation
from the super computers, to highlight the usefulness of the analytical model and
framework and provides recommendations for network configurations, particularly for
the latest Wireless Multimedia extensions available in IEEE 802.11.
Dimensioning shows an overall increase of acceptable capacity of 43%; from 7 to 10 bidirectional
calls per Access Point by using a tuned transmission opportunity to allow
each station to send 4 packets per transmission. It is found that, although the accuracy
of the results from the analytical model is not precise, the model achieves a 1 in 13,000
speed up compared to simulation. Results show that the point of maximum calls comes
close to simulation with the analytical model and framework and can be used as a guide
to configure the network. Alternatively, for specific capacity figures, the model can be
used to home-in on the optimal region for further experiments and therefore achievable
with standard computational resource, i.e. desktop machines
Supplementary Authors' List from Adverse Outcomes in Clear Cell Renal Cell Carcinoma with Mutations of 3p21 Epigenetic Regulators <i>BAP1</i> and <i>SETD2</i>: A Report by MSKCC and the KIRC TCGA Research Network
No full textPDF File - 101K, TCGA Author list.</p
L2 creative writers : identities and writing processes
No full textL2 creative writing research is a relatively unchartered area. Pedagogical
discussions on L2 creative writing activities often focus on manifestations of L2
learners' language learning, writing improvement, or expressions of emotion. There
is a lack of research investigating the underlying identities of L2 creative writers as
social agents. The present research targets the L2 creative writers who are interested
and experienced in certain forms of creative writing. It investigates if and how L2
creative writers' emergent identities enacted in their online cognitive writing
activities under particular tasks are mediated by the writers' 'autobiographical
identities' (Clark and Ivanič, 1997) rooted in their life histories.
Fifteen L2 creative writers from diverse sociocultural and academic backgrounds
participated in the research. Firstly, the participants' 'autobiographical identities'
were explored through eliciting their retrospective life-history accounts in in-depth
interviews. Secondly, the research implemented two think-aloud story-writing
sessions (Autobiographical writing & Prompted story-continuation writing) to
capture the writers' emergent identities instantiated in their cognitive writing
processes. Subsequently, the interconnectedness between these two types of
identities was sought.
Two parallel data analyses were conducted: 1) quantitative data coding targeting
all fifteen L2 creative writers and 2) qualitative discussions concentrating on five
selected focal participants. These two levels of analyses together show that the
participants' cognitive writing processes as evinced through their engagement in
these creative writing activities (i.e. their task-situated emergent identities) are
mediated by the writers’ previous participation in multiple discourses and social
worlds up to the moment of writing (i.e. their autobiographical identities formed
throughout their life histories).
The findings suggest certain directions for theory development in L2 creative
writing research as well as in L2 writer identity research. Regarding L2 creative
writing research, L2 teachers' practice could be enhanced by a deeper understanding
of how creative writing is employed by L2 individuals not only for language or
literacy acquisition purposes, but also as a self-empowering tool to achieve particular
social positioning. Secondly, regarding L2 writer identity research, more research
needs to be done regarding this micro and dynamic view of writer identity which
resides in the movements of the writers' emerging thoughts situated in an immediate
creative writing context and mediated by the writers' previous sociocultural
experiences
Aggregation with fragment retransmission for very high-speed WLANs
No full textAbstract—In upcoming very high-speed wireless LANs (WLANs), the physical (PHY) layer rate may reach 600 Mbps. To achieve high efficiency at the medium access control (MAC) layer, we identify fundamental properties that must be satisfied by any CSMA-/CA-based MAC layers and develop a novel scheme called aggregation with fragment retransmission (AFR) that exhibits these properties. In the AFR scheme, multiple packets are aggregated into and transmitted in a single large frame. If errors happen during the transmission, only the corrupted fragments of the large frame are retransmitted. An analytic model is developed to evaluate the throughput and delay performance of AFR over noisy channels and to compare AFR with similar schemes in the literature. Optimal frame and fragment sizes are calculated using this model. Transmission delays are minimized by using a zero-waiting mechanism where frames are transmitted immediately once the MAC wins a transmission opportunity. We prove that zero-waiting can achieve maximum throughput. As a complement to the theoretical analysis, we investigate the impact of AFR on the performance of realistic application traffic with diverse requirements by simulations. We have implemented the AFR scheme in the NS-2 simulator and present detailed results for TCP, VoIP, and HDTV traffic. The AFR scheme described was developed as part of the IEEE 802.11n working group work. The analysis presented here is general enough to be extended to proposed schemes in the upcoming 802.11n standard. Trends indicated in this paper should extend to any well-designed aggregation schemes
Literacy and the vernacular : a case study based on the post-colonial history of Mauritius, with particular reference to Mauritian Creole
No full textThis thesis examines the process of the literization of the vernacular, and seeks to establish the island of Mauritius as a case study of this process. The concept of literization equates standardization of the vernacular with its use as a written language. Four issues are established as central to this process: ideological, educational, sociocultural and technical.
The thesis investigates the particular sociolinguistic situation of Mauritius, and examines each of these issues in relation to Mauritian Creole. It demonstrates the role that Mauritian Creole plays in Mauritian society, and how, since independence, issues relating to ideology, education, and the cultural and technical aspects of standardization, have been involved in the promotion of the language. The interaction between these issues is apparent throughout the thesis, and manifested in the work of Ledikasyon pu Travayer (LPT), the only organization in Mauritius to provide literacy tuition in Mauritian Creole. The thesis seeks to show that their unified approach to literacy, standardization, and the promotion of Mauritian Creole exemplifies the issues involved, and provides the best basis for the establishment of Mauritian Creole as a standard language.
The analysis of the situation in Mauritius within the framework of wider issues of the literization of the vernacular permits a comparison to other former colonies facing problems of language choice, and places these issues within the wider sociolinguistic context of standardization
Investigation on superconducting properties of GdBa2Cu 3O7-δ added with nanosized ZnFe 2O4
No full textThe effect of nanosized ZnFe2O4, prepared by Co-precipitation method, on GdBa2Cu3O7- δ superconductor was studied. Therefore, superconducting samples of type (ZnFe2O4)xGdBa 2Cu3O7-δ, 0.0≤x≤0.1 wt.percent, were prepared by the conventional solid-state reaction technique. Moreover, nanosized ZnFe2O4 was characterized using X-ray powder diffraction (XRD), transmission electron microscope (TEM) and magnetic hysteresis measurements. The results revealed that a nanosized ZnFe 2O4 was achieved with average grain size 9 nm and a super-paramagnetic hysteresis. On the other hand, the superconducting samples were characterized and investigated through XRD, scanning electron microscope (SEM), electrical resistivity, ac magnetic susceptibility and Vickers microhardness. XRD results showed that the volume fraction of Gd-123 phase increases as x rises from 0.0 to 0.06 wt.percent while the SEM results showed that the grain connectivity between the grains increases with increasing x. The superconducting transition temperature Tc, determined from electrical resistivity and ac magnetic susceptibility, increases up to x = 0.06 wt.percent, and then it decreases. Moreover, electric field-current density (E-J) characteristic curves were measured at 77 K. An improvement of the critical current density was obtained with x increase up to 0.06 wt.percent. Furthermore, the Vickers microhardness data were analyzed using Meyer's law, Hays-Kendall approach, elastic-plastic deformation model and proportional specimen resistance model. The results indicated that Vickers microhardness number HV increases as x increases and it exhibits a normal indentation size effect. Moreover, the proportional specimen resistance model is found to be the best model to verify the experimental load independent Vickers microhardness values. © 2014 Elsevier B.V. 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