5,041 research outputs found
A Check List, 1956-1968, for Study of The King\u27s Quair, the Poetry of Robert Henryson, Gawin Douglas, and William Dunbar
Matthew P. McDiarmid (ed.) Harry\u27s WALLACE (Vita Nobilissimi Defensoris Scotie Wilelmi Wallace Militis). Edinburgh and London. Scottish Text Society, 4th ser., vols. 4, 5. William Blackwood & Sons Ltd. 1968. 671 pp.
An initial evaluation of a biohygrothermal model for the purpose of assessing the risk mould growth in UK dwellings
Moulds are organisms that may be found in both the indoor and outdoor environment. Moulds play an important rolebreaking down and digesting organic material, but, if they are significantly present in the indoor environment they mayaffect the health of the occupants. A relative humidity of 80% at wall surfaces is frequently stated as the decisivecriterion for mould growth and methods used to assess the risk of mould growth are often based on steady stateconditions. However, considering the dynamic conditions typically found in the indoor environment, a betterunderstanding of the conditions required for mould to grow would seem desirable. This paper presents initialexploratory work to evaluate and assess ‘WUFI-bio’ - ‘biohygrothermal’ software that predicts the likelihood of mould growth under transient conditions. Model predictions are compared with large monitored data set from 1,388 UKdwellings before and after insulation and new heating systems are installed (‘Warm Front’), the suitability of thissoftware as a tool to predict mould growth will ultimately be assessed. This paper presents some initial, exploratorywork
Microwave-induced resistance oscillations and zero-resistance states in 2D electron systems with two occupied subbands
We report on theoretical studies of recently discovered microwave-induced
resistance oscillations and zero resistance states in Hall bars with two
occupied subbands. In the same results, resistance presents a peculiar shape
which appears to have a built-in interference effect not observed before. We
apply the microwave-driven electron orbit model, which implies a
radiation-driven oscillation of the two-dimensional electron system. Thus, we
calculate different intra and inter-subband electron scattering rates and times
that are revealing as different microwave-driven oscillations frequencies for
the two electronic subbands. Through scattering, these subband-dependent
oscillation motions interfere giving rise to a striking resistance profile. We
also study the dependence of irradiated magnetoresistance with power and
temperature. Calculated results are in good agreement with experiments.Comment: 7 pages, 6 figure
Adaptive Polling for Responsive Web Applications
YesThe web environment has been developing remarkably, and much work has been done
towards improving web based notification systems, where servers act smartly by notifying and feeding
clients with subscribed data. In this paper we have reviewed some of the problems with current
solutions to real-time updates of multi user web applications; we introduce a new concept “adaptive
polling” based on one AJAX technique “Polling” to reduce the high volume of redundant server
connections with reasonable latency, we demonstrated a prototype implementation of the new
concept which is then evaluated against the existing one; the positive results clearly indicated more
efficiency in terms of client-server bandwidth
What moderates the attainment gap? The effects of social identity incompatibility and practical incompatibility on the performance of students who are or are not Black, Asian or Minority Ethnic
A successful journey through higher education is, for many, a once in a lifetime opportunity for social mobility. Unfortunately, one notable feature of higher education systems is that students from some backgrounds do not achieve the same academic attainments as do others. The current study tests the role of one particular set of processes: social identity (in)compatibility on academic performance. Participants were recruited at two time points from a pool of first year undergraduates at a modern London University (N=215) of which 40.1% were classed as Black, Asian or Minority Ethnic (BAME), 57.1% as non-BAME and 2.8% did not provide this information. A prospective design was employed: Alongside demographic data, measures at the start of the academic year consisted of measures of student and ethnic identity, and both practical and identity incompatibility. At the end of the academic year, average marks achieved were gained for each student from the university’s registry system. Results indicate that BAME students had equal levels of student identity to non-BAME students, but higher levels of ethnic identity. They also typically experienced higher levels of both practical and identity incompatibility. Finally, BAME students had lower attainment than did non-BAME students. Both practical and identity incompatibility appeared to moderate this effect. However, contrary to predictions, it was only under conditions of low and medium levels of incompatibility that BAME students attained lower marks than their non-BAME peers. The theoretical and practical implications of these findings are discussed
Upper-surface blowing nacelle design study for a swept wing airplane at cruise conditions
A study was made to design two types of overwing nacelles for an existing wing-body at a design condition of Mach = 0.8 and C sub L = 0.2. Internal and external surface contours were developed for nacelles having either a D-shaped nozzle or a high-aspect-ratio nozzle for upper-surface blowing in the powered-lift mode of operation. The goal of the design was the development of external nacelle lines that would minimize high-speed aerodynamic interference effects. Each nacelle type was designed for both two- and four-engine airplanes using an iterative process of aerodynamic potential flow analysis. Incremental nacelle drag estimates were made for flow-through wind tunnel models of each configuration
Performance of internal wall insulation systems - experimental test for the validation of a hygrothermal simulation tool
In the UK, transient models of heat, air and moisture transport (HAMT) are common
tools used by building practitioners to better understand moisture movement within building elements
and construction systems. Enforced by BS 5250:2011, hygrothermal simulations are also used for
condensation risk analysis and to estimate the likelihood of mould growth and fabric decay. This
paper describes the methodology applied in the validation of a hygrothermal-modelling tool used in
the evaluation of internal wall insulation. Wall assemblies typically constructed for internal insulation
were exposed to transient boundary conditions derived from vapour pressure profiles and their
response to step changes and fluctuations were analysed. The wall assemblies were constructed using
one wall substrate (aerated clay blocks and gypsum plaster) and eight commonly used internal
insulation systems. Relative humidity and temperature levels measured at the interface between the
wall substrate and each insulation system were used to assess the hygrothermal performance of each
insulation system. As a result, the wall assemblies were clustered in three subgroups; dense capillaryactive
insulation, lightweight vapour-permeable insulation and synthetic vapour-closed insulation,
and the hygrothermal performance of the proposed clusters compared with the results provided by the
simulation tool. It was found that simulated assemblies have similar hygrothermal performance as
those monitored
Pattern Competition in the Photorefractive Semiconductors
We analytically study the photorefractive Gunn effect in n-GaAs subjected to
two external laser beams which form a moving interference pattern (MIP) in the
semiconductor. When the intensity of the spatially independent part of the MIP,
denoted by , is small, the system has a periodic domain train (PDT),
consistent with the results of linear stability analysis. When is large,
the space-charge field induced by the MIP will compete with the PDT and result
in complex dynamics, including driven chaos via quasiperiodic route
SWMF simulation of field-aligned currents for a varying northward and duskward IMF with nonzero dipole tilt
- …