17 research outputs found

    Development of a low cost micro fuel cell complete with power conversion

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    The objective of the report was to design and fabricate a low cost micro fuel cell stack (μPEMFC). The author reviewed the components and technical considerations to take note in the design of the PEMFC which will affect the performance. Five main areas to tackle were the material selection, mechanical strength, electrical conductivity, sealing of the fuel cell and geometrical considerations. A low cost μPEMFC was developed with the bipolar plate combination of stainless steel porous metal foam and stainless steel plate. The porosity of the stainless steel porous metal foam reduces additional machining process and simplifies the design by eliminating the need to incise flow channels. A prototype was fabricated using the Computer Numerical Cutting (CNC) machine and the fuel cell was operated in the dead-end mode. The size of the fuel cell was approximated to be that of a D-size battery for portability purposes.Bachelor of Engineering (Mechanical Engineering

    Viral Evasion Mechanisms of the Host Response

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    This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contac

    QUESTIONNAIRE DESIGN AND DATA ANALYSIS: AN ALTERNATIVE APPROACH IN STUDENT EVALUATION OF TEACHING (SET)

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    Student evaluation of teaching (SET) has been widely used in institutions of learning to assess teaching effectiveness. However, most of the SET questionnaires are designed by "experts" without taking students' view into consideration. Besides that, the traditional approach in SET analysis is to obtain a global rating as a measurement of teaching effectiveness based on the average or mean scores of the items of SET. This paper identifies the weaknesses of the traditional approach in SET questionnaire development and data analysis. It then describes an alternative approach to SET items development which involved students- collaboration. The paper also describes the establishment of various scoring matrices for the measurement of overall teaching effectiveness as well as teaching effectiveness from three different domains, namely: knowledge, pedagogical skills and attitude. [ABSTRACT FROM AUTHOR

    Inception Report on Development of A Refugium Management Plan for the Mud Spiny Lobster (Panulirus polyphagus).

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    This report is under the SEAFDEC/UNEP/GEF Project on “Establishment and Operation of a Regional System of Fisheries Refugia in the South China Sea and Gulf of Thailand”The mud spiny lobster (Panulirus polyphagus) is one of the favourites seafood exported from Malaysia. There are limited studies on the mud spiny lobster by the local scientific community as compared to the rock lobster (Jasus edwardsii) and common spiny lobster (Panulirus vulgaris). Although there are relatively less studies on the mud spiny lobster in this region, the Panulirus polyphagus is the predominant lobster reported in the east coast of the Peninsular Malaysia, from Kelantan in the North, down to Johor in the South (Alias et al., 2000). Noor Hanis and Siow (2019) reported the landing trend of this species begin showing a declining trend since early 2010s’, probably associated with the harvesting pressure. The declining landing trend suggested the needs to protect this spiny lobster to be protected to sustain the species in the area.UNEP/GE

    The 1961 Kampong Bukit Ho Swee fire and the making of modern Singapore

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    By 1970, Singapore’s urban landscape was dominated by high-rise blocks of planned public housing built by the People’s Action Party government, signifying the establishment of a high modernist nation-state. A decade earlier, the margins of the City had been dominated by kampongs, home to semi-autonomous communities of low-income Chinese families which freely built, and rebuilt, unauthorised wooden houses. This change was not merely one of housing but belied a more fundamental realignment of state-society relations in the 1960s. Relocated in Housing and Development Board flats, urban kampong families were progressively integrated into the social fabric of the emergent nation-state. This study examines the pivotal role of an event, the great Kampong Bukit Ho Swee fire of 1961, in bringing about this transformation. The redevelopment of the fire site in the aftermath of the calamity brought to completion the British colonial regime’s ‘emergency’ programmes of resettling urban kampong dwellers in planned accommodation, in particular, of building emergency public housing on the sites of major fires in the 1950s. The PAP’s far greater political resolve, and the timing of and state of emergency occasioned by the scale of the 1961 disaster, enabled the government to rehouse the Bukit Ho Swee fire victims in emergency housing in record time. This in turn provided the HDB with a strategic platform for clearing other kampongs and for transforming their residents into model citizens of the nation-state. The 1961 fire’s symbolic usefulness extended into the 1980s and beyond, in sanctioning the PAP’s new housing redevelopment schemes. The official account of the inferno has also become politically useful for the government of today for disciplining a new generation of Singaporeans against taking the nation’s progress for granted. Against these exalted claims of the fire’s role in the Singapore Story, this study also examines the degree of actual change and continuity in the social and economic lives of the people of Bukit Ho Swee after the inferno. In some crucial ways, the residents continued to occupy a marginal place in society while pondering, too, over the unresolved question of the cause of the fire. These continuities of everyday life reflect the ambivalence with which the citizenry regarded the high modernist state in contemporary Singapore

    Reefing Viability Index for Rigs-to-Reefs (R2R) in Malaysia

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    Decommissioning of the offshore platform as an artificial reef, known as Rigs-to-Reefs (R2R), has become a sustainable approach for oil companies. The platform was reused to serve the underwater ecosystem as an artificial reef for a new marine ecosystem which helps to tackle food security issue. This paper presents the findings of the formulation of the reefing viability index to recognize an offshore region that can be used for R2R projects within the South China Sea. The combined effects of spatial data, numerical modelling, and geographic system (GIS) are proposed to study the relationship of spawning ground coral reefs, diversity, and planula larvae in the process of colonization to establish a map of the reef potential environment. Coral connectivity and spawning behaviour were studied to determine the possible source of coral seedling released during the spawning season, twice a year. A geographic reef viability index was established consisting of seven parameters which are coral larval density, pelagic larval length, sea currents, temperature, chlorophyll-a, depth, and substrate availability. The ocean hydrodynamic model was designed to resemble the pattern of larval scattering. By using the simulations and rankings, there were 95 (21%) sites which could probably be used for in situ reefing, whereas 358 (79%) sites were likely ideal for ex situ reefing. Validation of the viability index was carried out using media footage assessment of remotely operated vehicle (ROV)

    Converting The Strata Building to LADM

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    A country profile based on LADM has been conceptualised in the last few years as part of joint research efforts between the Department of Survey and Mapping Malaysia (JUPEM) and Universiti Teknologi Malaysia (UTM). The LADM conceptual model covers various aspects of spatial data components available in the mapping agency (JUPEM), including data from Land Office e.g. land registration. The Malaysian LADM country profile covers various classes of spatial unit including strata objects classes such as MY_Building, MY_ParcelUnit, MY_AccessoryUnit, MY_CommonPropertyUnit, MY_LimitedCommonPropertyUnit and MY_LandParcel. This paper discusses one experiment of converting the available building strata schema into LADM model, specifically MY_SpatialUnit for 2D and 3D. The existing building strata schema was developed based on XML syntax. The entire workflow of the experiment will be demonstrated where conversion of file with strata XML data collected from the field into the database with LADM data model, and then 3D visualization. We also plan to investigate the potentials of implementing topological connections in the conversion. It is anticipated that the developed conversion and integration modules could serve as an initial research towards a bigger scope of work for nearfuture LADM compliance model for the mapping agency and other stakeholders. ConvertingOLD Department of GIS Technolog

    Effective interventions in preventing gestational diabetes mellitus: A systematic review and meta-analysis

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    Background: Lifestyle choices, metformin, and dietary supplements may prevent GDM, but the effect of intervention characteristics has not been identified. This review evaluated intervention characteristics to inform the implementation of GDM prevention interventions. Methods: Ovid, MEDLINE/PubMed, and EMBASE databases were searched. The Template for Intervention Description and Replication (TIDieR) framework was used to examine intervention characteristics (who, what, when, where, and how). Subgroup analysis was performed by intervention characteristics. Results: 116 studies involving 40,940 participants are included. Group-based physical activity interventions (RR 0.66; 95% CI 0.46, 0.95) reduce the incidence of GDM compared with individual or mixed (individual and group) delivery format (subgroup p-value = 0.04). Physical activity interventions delivered at healthcare facilities reduce the risk of GDM (RR 0.59; 95% CI 0.49, 0.72) compared with home-based interventions (subgroup p-value = 0.03). No other intervention characteristics impact the effectiveness of all other interventions. Conclusions: Dietary, physical activity, diet plus physical activity, metformin, and myoinositol interventions reduce the incidence of GDM compared with control interventions. Group and healthcare facility-based physical activity interventions show better effectiveness in preventing GDM than individual and community-based interventions. Other intervention characteristics (e.g. utilization of e-health) don’t impact the effectiveness of lifestyle interventions, and thus, interventions may require consideration of the local context. © The Author(s) 2024
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