91,123 research outputs found
Data Management and Mining in Astrophysical Databases
We analyse the issues involved in the management and mining of astrophysical
data. The traditional approach to data management in the astrophysical field is
not able to keep up with the increasing size of the data gathered by modern
detectors. An essential role in the astrophysical research will be assumed by
automatic tools for information extraction from large datasets, i.e. data
mining techniques, such as clustering and classification algorithms. This asks
for an approach to data management based on data warehousing, emphasizing the
efficiency and simplicity of data access; efficiency is obtained using
multidimensional access methods and simplicity is achieved by properly handling
metadata. Clustering and classification techniques, on large datasets, pose
additional requirements: computational and memory scalability with respect to
the data size, interpretability and objectivity of clustering or classification
results. In this study we address some possible solutions.Comment: 10 pages, Late
Development of bambangan (Mangifera pajang) carbonated drink
Mangifera pajang Kostermans or bambangan is a popular fruit among Sabahan due
to its health and economic values. However, the fruit is not fully commercialized since it is
usually been used as traditional cuisine by local people. Thus, development of bambangan fruit
into carbonated drink was conducted to produce new product concept. The objectives of this
study were to conceptualize, formulate, evaluate consumer acceptance, and determine
physicochemical properties and nutritional composition of the accepted product. Method used
in conceptualising the product was based on questionnaire. The consumer acceptance was
evaluated based on descriptive and affective tests with four product formulations tested. The
physicochemical properties on carbon dioxide volume, colour, pH, total acidity, total soluble
solid (TSS) and viscosity were highlighted, meanwhile nutritional composition on fat, protein,
carbohydrates and energy content were determined. About 77% respondents gave positive
feedback, and 69% respondents decided this product is within their budget. The formulation of
5% bambangan pulp, 70% water, 25% sugar and 0.2% citric acid was highly accepted in
descriptive and affective tests with 4.4 and 6.39 mean scores, respectively. The
physicochemical properties and nutritional composition of the acceptance product were in
optimum value except for colour, total acidity and TSS. Overall, this study showed that the
product has high potential to be commercialized as new product concept, and heritage of
indigenous people can be preserved when this fruit is known regionally
Ontology of core data mining entities
In this article, we present OntoDM-core, an ontology of core data mining
entities. OntoDM-core defines themost essential datamining entities in a three-layered
ontological structure comprising of a specification, an implementation and an application
layer. It provides a representational framework for the description of mining
structured data, and in addition provides taxonomies of datasets, data mining tasks,
generalizations, data mining algorithms and constraints, based on the type of data.
OntoDM-core is designed to support a wide range of applications/use cases, such as
semantic annotation of data mining algorithms, datasets and results; annotation of
QSAR studies in the context of drug discovery investigations; and disambiguation of
terms in text mining. The ontology has been thoroughly assessed following the practices
in ontology engineering, is fully interoperable with many domain resources and
is easy to extend
Environmental sustainability in the mining sector: evidence from Catalan companies
This paper examines the adoption of environmental practices in small and medium sized companies inthe surface mining industry in Catalonia (Spain). To fulfill this aim, a survey of 41 items concernint environmental management systems and environmentally sustainable practices has been conducted.
Results show that companies have committed themselves to environmental and sustainable issues. The majority of companies claim to understand the effects of their activities on the environment and they care for responsible access and management of natural resources. Restoration plans and the annual waste declaration are mandatory in Catalonia, and rational resources exploitation practices have been adopted by a high percentage of mines. Finally, some examples of good environmentally sustainable practices are introduced.Peer ReviewedPostprint (author’s final draft
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