Bulging anterior fontanelle: an unusual presenting sign of nutritional rickets

Aim: To report the first case series of infants with nutritional rickets who presented with bulging anterior fontanelleMethods: infants who were admitted to Alrass General Hospital, Qassim, Saudi Arabia, between October 2004 and October 2007, with bulging anterior fontanelle and later found to have nutritional rickets were reviewed. Diagnosis of rickets was based on typical biochemical and radiological findings with or without clinical signs of rickets and with a good response to treatment with vitamin D with or without calcium.Results: Nine cases of nutritional rickets who presented with bulging anterior fontanelle are reported. All were below 12 months of age and the majorities are boys. All patients are exclusively breast-fed. Five cases had hypocalcaemia and three of them presented with hypocalcaemic seizures.Five cases showed no clinical signs of rickets. Clinical, biochemical and radiological signs of rickets as well as the status of the anterior fontanelle reverted to normal within six weeks after treatment with vitamin D in all except one patient who took four months to respond.Conclusion: Nutritional rickets remains a problem in Saudi Arabia. A bulging anterior fontanelle is an important, but under- recognized presenting feature of nutritional rickets. Recognition of this association will alley anxiety when confronted with a case of rickets with a bulging anteriorfontanelle.Keywords: hypocalcaemic seizures, vitamin D, hypophosphataesia

Exogenous spatial precuing reliably modulates object processing but not object substitution masking

Object substitution masking (OSM) is used in behavioral and imaging studies to investigate processes associated with the formation of a conscious percept. Reportedly, OSM occurs only when visual attention is diffusely spread over a search display or focused away from the target location. Indeed, the presumed role of spatial attention is central to theoretical accounts of OSM and of visual processing more generally (Di Lollo, Enns, & Rensink, Journal of Experimental Psychology: General 129:481–507, 2000). We report a series of five experiments in which valid spatial precuing is shown to enhance the ability of participants to accurately report a target but, in most cases, without affecting OSM. In only one experiment (Experiment 5) was a significant effect of precuing observed on masking. This is in contrast to the reliable effect shown across all five experiments in which precuing improved overall performance. The results are convergent with recent findings from Argyropoulos, Gellatly, and Pilling (Journal of Experimental Psychology: Human Perception and Performance 39:646–661, 2013), which show that OSM is independent of the number of distractor items in a display. Our results demonstrate that OSM can operate independently of focal attention. Previous claims of the strong interrelationship between OSM and spatial attention are likely to have arisen from ceiling or floor artifacts that restricted measurable performance

Holographic DC conductivities from the open string metric

We study the DC conductivities of various holographic models using the open string metric (OSM), which is an effective metric geometrizing density and electromagnetic field effect. We propose a new way to compute the nonlinear conductivity using OSM. As far as the final conductivity formula is concerned, it is equivalent to the Karch-O'Bannon's real-action method. However, it yields a geometrical insight and technical simplifications. Especially, a real-action condition is interpreted as a regular geometry condition of OSM. As applications of the OSM method, we study several holographic models on the quantum Hall effect and strange metal. By comparing a Lifshitz background and the Light-Cone AdS, we show how an extra parameter can change the temperature scaling behavior of conductivity. Finally we discuss how OSM can be used to study other transport coefficients, such as diffusion constant, and effective temperature induced by the effective world volume horizon.Comment: 33 page

Drivers constraints and the future of off-site manufacture in Australia.

Much has been written on Off-site Manufacture (OSM) in construction, particularly regarding the perceived benefits and barriers to implementation. However, very little understanding of the state of OSM in the Australian construction industry exists. A ‘scoping study' has recently been undertaken to determine the ‘state-of-the-art’ of OSM in Australia. This involved several industry workshops, interviews and case studies across four major states of Australia. The study surveyed a range of suppliers across the construction supply-chain, incorporating the civil, commercial and housing segments of the market. This revealed that skills shortages and lack of adequate OSM knowledge are generally the greatest issues facing OSM in Australia. The drivers and constraints that emerged from the research were, in large measure, consistent with those found in the US and UK, although some Australian anomalies are evident, such as the geographical disparity of markets. A comparative analysis with similar studies in the UK and US is reported, illustrating both the drivers and constraints confronting the industry in Australia. OSM uptake into the future is however dependent on many factors, not least of which is a better understanding of the construction process and its associated costs

OFFSITE MANUFACTURING: THE WAY FORWARD FOR NIGERIA’S HOUSING INDUSTRY

Nigeria is one of the most developed countries in Africa, with construction contributing to approximately 9 of its Gross Domestic Product. From a housing perspective, new initiatives are now being explored, one of which is Offsite Manufacturing (OSM). Globally, the OSM market uses several terms interchangeably, the most prevalent of which include: prefabrication, offsite production, industrialised building systems, dry construction, modern methods of construction etc. These collective approaches have been successfully used in many countries as means of improving housing delivery, particularly in countries like the UK, USA, Australia, Sweden, Japan and Malaysia. Despite the myriad of benefits associated with OSM (e.g. speed of construction, improved quality, reduced risk etc.), there are various barriers identified in the course of adopting OSM; some of these barriers include: client resistance, lack of established codes and standards, negative perception etc. Given these opportunities and barriers, this study investigates the feasibility of adopting OSM and ways of overcoming the barriers hindering its uptake in Nigeria based on the experiences of developed countries. The first part of this paper presents a synthesised literature review which explores the benefits and challenges of using OSM in different countries (including Nigeria as a comparator). Research findings highlight core OSM uptake barriers, including issues such as: reluctance to innovate, paucity of codes and standards, lack of guidance and information, high capital cost, supply chain integrations, skill requirements etc. Whilst many of these countries have now established strategies to offset these uncertainties, it was also observed that governmental support was pivotal in helping to establish OSM as a viable alternative to traditional approaches. From a Nigerian context, similar parallels are observed, most notably the need to encourage OSM through greater awareness, better government policies, and through skilled supply chain partners in order to help improve the problem of housing shortage

Are crowdsourced datasets suitable for specialized routing services? Case study of Openstreetmap for routing of people with limited mobility

Nowadays, Volunteered Geographic Information (VGI) has increasingly gained attractiveness to both amateur users and professionals. Using data generated from the crowd has become a hot topic for several application domains including transportation. However, there are concerns regarding the quality of such datasets. As one of the most famous crowdsourced mapping platforms, we analyze the fitness for use of OpenStreetMap (OSM) database for routing and navigation of people with limited mobility. We assess the completeness of OSM data regarding sidewalk information. Relevant attributes for sidewalk information such as sidewalk width, incline, surface texture, etc. are considered, and through both extrinsic and intrinsic quality analysis methods, we present the results of fitness for use of OSM data for routing services of disabled persons. Based on empirical results, it is concluded that OSM data of relatively large spatial extents inside all studied cities could be an acceptable region of interest to test and evaluate wheelchair routing and navigation services, as long as other data quality parameters such as positional accuracy and logical consistency are checked and proved to be acceptable. We present an extended version of OSMatrix web service and explore how it is employed to perform spatial and temporal analysis of sidewalk data completeness in OSM. The tool is beneficial for piloting activities, whereas the pilot site planners can query OpenStreetMap and visualize the degree of sidewalk data availability in a certain region of interest. This would allow identifying the areas that data are mostly missing and plan for data collection events. Furthermore, empirical results of data completeness for several OSM data indicators and their potential relation to sidewalk data completeness are presented and discussed. Finally, the article ends with an outlook for future research study in this area

Fusion of Heterogeneous Earth Observation Data for the Classification of Local Climate Zones

This paper proposes a novel framework for fusing multi-temporal, multispectral satellite images and OpenStreetMap (OSM) data for the classification of local climate zones (LCZs). Feature stacking is the most commonly-used method of data fusion but does not consider the heterogeneity of multimodal optical images and OSM data, which becomes its main drawback. The proposed framework processes two data sources separately and then combines them at the model level through two fusion models (the landuse fusion model and building fusion model), which aim to fuse optical images with landuse and buildings layers of OSM data, respectively. In addition, a new approach to detecting building incompleteness of OSM data is proposed. The proposed framework was trained and tested using data from the 2017 IEEE GRSS Data Fusion Contest, and further validated on one additional test set containing test samples which are manually labeled in Munich and New York. Experimental results have indicated that compared to the feature stacking-based baseline framework the proposed framework is effective in fusing optical images with OSM data for the classification of LCZs with high generalization capability on a large scale. The classification accuracy of the proposed framework outperforms the baseline framework by more than 6% and 2%, while testing on the test set of 2017 IEEE GRSS Data Fusion Contest and the additional test set, respectively. In addition, the proposed framework is less sensitive to spectral diversities of optical satellite images and thus achieves more stable classification performance than state-of-the art frameworks.Comment: accepted by TGR

Re-use of domain knowledge to increase adoption of off-site manufacturing for construction in Australia

Many construction industry decision-makers believe there is a lack of off-site manufacture (OSM) adoption for non-residential construction in Australia. Identification of construction business process was considered imperative in order to assist decision-makers to increase OSM utilisation. The premise that domain knowledge can be re-used to provide an intervention point in the construction process led a team of researchers to construct simple base-line process models for the complete construction process, segmented into six phases. Sixteen domain knowledge industry experts were asked to review the construction phase base-line models to answer the question “Where in the process illustrated by this base-line model phase is an OSM task?”. Through an iterative and generative process a number of off-site manufacture intervention points were identified and integrated into the process models. The re-use of industry expert domain knowledge provided suggestions for new ways to do basic tasks thus facilitating changes to current practice. It is expected that implementation of the new processes will lead to systemic industry change and thus a growth in productivity due to increased adoption of OSM