3,632 research outputs found
Harmonic analysis of EMUs in railway systems
Author name used in this publication: Edward W. C. LoVersion of RecordPublishe
Intelligent integration of BIPV and load management systems for modern buildings
This paper outlines the basics of load management, and highlights the possibility of maximising the contribution from the Building Integrated Photovoltaic (BIPV) power generation. It will also explain the underlying principles of a dynamic modelling approach and its application in supporting the anticipatory control strategy for load shifting. For many types of building applications, the load profiles are well matched with the BIPV generation profiles such that the BIPV power source is already acting as the peak clipping device. The application of Building Management Systems (BMS) in load shifting should consider the supply from BIPV system. Secondly, due to the thermal mass of the building, there exists time delay in the response of the power requirement of the HVAC system in the building from the solar radiation data. The BIPV system, on the contrary, is responding almost instantaneously to the solar irradiance. A dynamic BIPV model could be applied in aiding the prediction of the load profile. This paper will outline these aspects of the BIPV system as a demonstration of its application in BMS.postprintThe 8th Annual Power Symposium, Hong Kong, 19 June 2009
Integration of BIPV systems and load management
This paper outlines the basics of load management, and highlights the possibility of maximising the contribution from the Building Integrated Photovoltaic (BIPV) power generation. It will also explain the underlying principles of a dynamic modelling approach and its application in supporting the anticipatory control strategy for load shifting. For many types of building applications, the load profiles are well matched with the BIPV generation profiles such that the BIPV power source is already acting as the peak clipping device. The application of Building Management Systems (BMS) in load shifting should consider the supply from BIPV system. Secondly, due to the thermal mass of the building, there exists time delay in the response of the power requirement of the HVAC system in the building from the solar radiation data. The BIPV system, on the contrary, is responding almost instantaneously to the solar irradiance. A dynamic BIPV model could be applied in aiding the prediction of the load profile. This paper will outline these aspects of the dynamic model developed as a demonstration of its application.postprintThe International Conference on Electrical Engineering 2009
Clinical predictors of fetal and maternal outcome in Chinese patients with systemic lupus erythematosus
published_or_final_versio
Cervical dysplasia in patients with systemic lupus erythematosus
published_or_final_versio
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Designing theoretically-informed implementation interventions
Clinical and health services research is continually producing new findings that may contribute to effective and efficient patient care. However, the transfer of research findings into practice is unpredictable and can be a slow and haphazard process. Ideally, the choice of implementation strategies would be based upon evidence from randomised controlled trials or systematic reviews of a given implementation strategy. Unfortunately, reviews of implementation strategies consistently report effectiveness some, but not all of the time; possible causes of this variation are seldom reported or measured by the investigators in the original studies. Thus, any attempts to extrapolate from study settings to the real world are hampered by a lack of understanding of the effects of key elements of individuals, interventions, and the settings in which they were trialled. The explicit use of theory offers a way of addressing these issues and has a number of advantages, such as providing: a generalisable framework within which to represent the dimensions that implementation studies address, a process by which to inform the development and delivery of interventions, a guide when evaluating, and a way to allow for an exploration of potential causal mechanisms. However, the use of theory in designing implementation interventions is methodologically challenging for a number of reasons, including choosing between theories and faithfully translating theoretical constructs into interventions. The explicit use of theory offers potential advantages in terms of facilitating a better understanding of the generalisability and replicability of implementation interventions. However, this is a relatively unexplored methodological area
A study on text-score disagreement in online reviews
In this paper, we focus on online reviews and employ artificial intelligence
tools, taken from the cognitive computing field, to help understanding the
relationships between the textual part of the review and the assigned numerical
score. We move from the intuitions that 1) a set of textual reviews expressing
different sentiments may feature the same score (and vice-versa); and 2)
detecting and analyzing the mismatches between the review content and the
actual score may benefit both service providers and consumers, by highlighting
specific factors of satisfaction (and dissatisfaction) in texts.
To prove the intuitions, we adopt sentiment analysis techniques and we
concentrate on hotel reviews, to find polarity mismatches therein. In
particular, we first train a text classifier with a set of annotated hotel
reviews, taken from the Booking website. Then, we analyze a large dataset, with
around 160k hotel reviews collected from Tripadvisor, with the aim of detecting
a polarity mismatch, indicating if the textual content of the review is in
line, or not, with the associated score.
Using well established artificial intelligence techniques and analyzing in
depth the reviews featuring a mismatch between the text polarity and the score,
we find that -on a scale of five stars- those reviews ranked with middle scores
include a mixture of positive and negative aspects.
The approach proposed here, beside acting as a polarity detector, provides an
effective selection of reviews -on an initial very large dataset- that may
allow both consumers and providers to focus directly on the review subset
featuring a text/score disagreement, which conveniently convey to the user a
summary of positive and negative features of the review target.Comment: This is the accepted version of the paper. The final version will be
published in the Journal of Cognitive Computation, available at Springer via
http://dx.doi.org/10.1007/s12559-017-9496-
Plasma osteopontin concentrations in preeclampsia - is there an association with endothelial injury?
Background: It has been previously reported that plasma
osteopontin (OPN) concentrations are increased in cardiovascular
disorders. The goal of the present study was to determine plasma
OPN concentrations in healthy pregnant women and preeclamptic
patients, and to investigate their relationship to the clinical
characteristics of the study subjects and to markers of
inflammation [C-reactive protein (CRP)], endothelial activation
[von Willebrand factor antigen (VWF: Ag)] or endothelial injury
(fibronectin), oxidative stress [malondialdehyde (MDA)] and
trophoblast debris (cell-free fetal DNA). Methods: Forty-four
patients with preeclampsia and 44 healthy pregnant women matched
for age and gestational age were involved in this case-control
study. Plasma OPN concentrations were measured with ELISA. Serum
CRP concentrations were determined with an autoanalyzer using
the manufacturer's reagents. Plasma VWF: Ag was quantified by
ELISA, while plasma fibronectin concentrations were measured by
nephelometry. Plasma MDA concentrations were estimated by the
thiobarbituric acid-based colorimetric assay. The amount of
cell-free fetal DNA in maternal plasma was determined by
quantitative real-time PCR analysis of the sex-determining
region Y (SRY) gene. For statistical analyses, non-parametric
methods were applied. Results: Serum levels of CRP, as well as
plasma concentrations of VWF: Ag, fibronectin, MDA and cell-free
fetal DNA were significantly higher in preeclamptic patients
than in healthy pregnant women. There was no significant
difference in plasma OPN concentrations between controls and the
preeclamptic group. However, preeclamptic patients with plasma
fibronectin concentrations in the upper quartile had
significantly higher plasma OPN concentrations than those below
the 75th percentile, as well as healthy pregnant women [median
(interquartile range): 9.38 (8.10-11.99) vs. 7.54 (6.31-9.40)
and 7.40 (6.51-8.80) ng/mL, respectively, p < 0.05 for both].
Furthermore, in preeclamptic patients, plasma OPN concentrations
showed a significant positive linear association with plasma
fibronectin (Spearman R = 0.38, standardized regression
coefficient (beta) = 0.41, p < 0.05 for both). Conclusions:
Plasma OPN concentrations are increased in preeclamptic patients
with extensive endothelial injury. However, further studies are
warranted to explore the relationship between OPN and
endothelial damage. Clin Chem Lab Med 2010;48: 181-7
Oral health and breastfeeding promotion program for pregnant women
The aim of this project was to promote the awareness and knowledge of pregnant women and infant oral health as well as the oral benefits of breastfeeding through a multi-disciplinary approach. This pilot oral health promotion program was developed to promote oral health knowledge related to the common dental problems among pregnant women and infants, and the oral health advantages of breastfeeding for infants.
The program was conducted twice during March to April 2016 at the Queen Elizabeth Hospital. It consisted of a 15-minute PowerPoint presentation and a 15-minute small-group interactive workshop on Oral Hygiene Instructions. Evaluation forms were used to collect the feedbacks of the participants.
The feedbacks for both the PowerPoint presentation and the interactive workshop were positive. Over 70% of the participants found that the contents were well-presented and the dental students were able to answer their questions. Furthermore, the participants agreed that the stated objectives of the program were met and the content of the program could be applicable in the coming future. Over 80% of the participants expressed that they understood the oral health advantages of breastfeeding after this program.
To conclude, this program can effectively promote the key oral health messages about the common oral health problems of pregnant women and infants as well as the oral health advantages of breastfeeding. Also, this program can be effectively incorporated into the existing ante-natal classes.
Further research can be performed to quantify the effectiveness by comparing the dental knowledge of pregnant women before and after this program. Further cooperation with a wider range of organizations, such as midwifery and nursing schools should also be explored.published_or_final_versio
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