Interoperability between Multimedia Collections for Content and Metadata-Based Searching

Artiste is a European project developing a cross-collection search system for art galleries and museums. It combines image content retrieval with text based retrieval and uses RDF mappings in order to integrate diverse databases. The test sites of the Louvre, Victoria and Albert Museum, Uffizi Gallery and National Gallery London provide their own database schema for existing metadata, avoiding the need for migration to a common schema. The system will accept a query based on one museum’s fields and convert them, through an RDF mapping into a form suitable for querying the other collections. The nature of some of the image processing algorithms means that the system can be slow for some computations, so the system is session-based to allow the user to return to the results later. The system has been built within a J2EE/EJB framework, using the Jboss Enterprise Application Server

African vegetable diversity in the limelight: project activities by ProNIVA.

Poster presented at Botanical Congress. Hamburg (Germany), 3-7 Sep 200

Meteorological information in GPS-RO reflected signals

Vertical profiles of the atmosphere can be obtained globally with the radio-occultation technique. However, the lowest layers of the atmosphere are less accurately extracted. A good description of these layers is important for the good performance of Numerical Weather Prediction (NWP) systems, and an improvement of the observational data available for the low troposphere would thus be of great interest for data assimilation. We outline here how supplemental meteorological information close to the surface can be extracted whenever reflected signals are available. We separate the reflected signal through a radioholographic filter, and we interpret it with a ray tracing procedure, analyzing the trajectories of the electromagnetic waves over a 3-D field of refractive index. A perturbation approach is then used to perform an inversion, identifying the relevant contribution of the lowest layers of the atmosphere to the properties of the reflected signal, and extracting some supplemental information to the solution of the inversion of the direct propagation signals. It is found that there is a significant amount of useful information in the reflected signal, which is sufficient to extract a stand-alone profile of the low atmosphere, with a precision of approximately 0.1 %. The methodology is applied to one reflection case

ENHANCING PRE-SERVICE TEACHERS’ UNDERSTANDING AND ATTITUDES TOWARD NAMING AND REACTIONS OF ORGANIC COMPOUNDS USING JIGSAW APPROACH

This study aimed at enhancing pre-service teachers’ understanding and attitudes toward naming and reactions of organic compounds using the jigsaw approach. It was a descriptive study that used a quantitative approach in collecting the data for analysis. The research design was a quasi-experimental one, which adapted the non-randomised control group pre-test/post-test intact class design. A sample of 144 pre-service teachers, comprising 72 in the experimental group and 72 in the control group were engaged in the study. Intact classes were used for the study; thus, the sample selection was non-randomised. ‘Organic Chemistry Concept Understanding Test’ (OCCUT) in the form of a pre-test and a post-test as well as an ‘Organic Chemistry Attitude Scale’ (OCAS) were the instruments used for the study. The reliability indices of the pre-test and the post-test were 0.721 and 0.724 respectively, whereas, Cronbach’s alpha reliability coefficient of the ‘OCAS’ was 0.899. This study found that in terms of the pre-service teachers’ prior knowledge on naming and reactions of organic compounds, the experimental group and the control group both had more misunderstanding and partial understanding than a sound understanding of the concepts. The findings further revealed that the majority of the pre-service teachers in the experimental group had a sound understanding of the naming and reactions of organic compounds after they were taught through the jigsaw approach. Nevertheless, quite a large number of the pre-service teachers in the control group continue to show a misunderstanding of the concepts after they were taught through the traditional lecture-method. Again, the study found that the jigsaw approach enhanced the pre-service teachers’ attitudes toward the organic chemistry concepts than the traditional lecture-method.  Article visualizations

Publicity of Livestock Training Institutes in Kenya

Educational publicity is undertaken to give the public accurate and complete understanding of Education Institutions. Publicizing the Livestock Training Institutes (LTIs) has been an annual event since the inception of Training frontline Agricultural Extension staff in Post Independent Kenya. The responsibilities of the publicity have cost implications. This study was prompted by the practical concern of finding a cost effective way of publicizing the Livestock Training Institutes of the State Department of Livestock more efficiently in the current Constitutional set up of devolved functions of the Counties, and the Mandate of the LTIs carrying out a national function as Educational Institutions. The objectives of the study were to find out the most effective means of publicity in the counties, to establish if there was a gender difference in relation to the means of publicity and to establish the students motivation in undertaking the AHITI course. Survey design was adopted and all 630 students in the LTIs responded to a questionnaires ensuring that even the marginalized counties with very few students participated in the study. The survey established that the most popular publicity channel differed by county, with majority of the students pointing out that information from former students and parents were the most effective means of publicity.  Further, the findings indicated that there was a relationship between gender and effective  publicity channels between the Counties. A big group of the LTI students (45%) intended to go into self-employment while minority (24%) intended to seek gainful employment. Keywords: Educational Publicity, Student Career Guidance, Livestock Training Institutes

Climate Change and Rural Livelihoods in the Lawra District of Ghana. A Qualitative Based Study

Climate change is a growing threat to the world's poorest and most vulnerable living in rural areas. The impacts of climate change challenge efforts to reducing poverty and hence, will require new approaches to focus development programming on the changing realities of the world. Understanding how the impacts of climate change affect the people, and their knowledge and experience in coping with it will assist in identifying appropriate strategies for adaptation to it. This paper thus examined the impacts of climate change on livelihoods of rural communities in the Upper West region of Ghana and the challenges posed to efforts at reducing poverty in the area. Discussions on vulnerability to climate variability and adaptation issues in this paper focused on evidence observed by 10 communities in the Lawra District. Adopting a qualitative approach, ten focused group discussions were organized to gather data. Specific issues discussed surrounded evidence of climate change in the communities, its impacts, underlying causes of vulnerability to climate and coping strategies employed by community members. Based on the discussions, the paper recommends the need to develop and intensify effective institutional mechanisms to facilitate community adaptation measures, awareness raising (creation) on anti-environments practices in communities, institution of bye and customary laws to regulate human anti-environmental activities, and the implementation of adaptation projects to aid communities cope with the major impacts of climate change in the district and world at large

Protecting Legitimate Software Users’ Interest in Designing a Piracy Prevention Technique on Computer Network

This paper is an attempt to substantiate the fact that socio economic issue has to be put into consideration in any effort at preventing software piracy. A legitimate software owner must be given certain period of grace to cater for unforeseen contingencies during which re-installation is allowed without being counted against him. A mathematical equation - TUSRUC EQUATION (Time Usage of Software in Respect of Unforeseen Contingencies) is developed as an algorithmic function, which shows the way the system handles cases of unforeseen contingencies during the “first time” period of using a software product. These unforeseen contingencies can include the following and not limited to; reformatting of a system, sudden virus attack, system hardware damage. Keywords: Software Piracy, Unforeseen contingencies, TUSRU

Use of reflected GNSS SNR data to retrieve either soil moisture or vegetation height from a wheat crop

This work aims to estimate soil moisture and vegetation height from Global Navigation Satellite System (GNSS) Signal to Noise Ratio (SNR) data using direct and reflected signals by the land surface surrounding a ground-based antenna. Observations are collected from a rainfed wheat field in southwestern France. Surface soil moisture is retrieved based on SNR phases estimated by the Least Square Estimation method, assuming the relative antenna height is constant. It is found that vegetation growth breaks up the constant relative antenna height assumption. A vegetation-height retrieval algorithm is proposed using the SNR-dominant period (the peak period in the average power spectrum derived from a wavelet analysis of SNR). Soil moisture and vegetation height are retrieved at different time periods (before and after vegetation's significant growth in March). The retrievals are compared with two independent reference data sets: in situ observations of soil moisture and vegetation height, and numerical simulations of soil moisture, vegetation height and above-ground dry biomass from the ISBA (interactions between soil, biosphere and atmosphere) land surface model. Results show that changes in soil moisture mainly affect the multipath phase of the SNR data (assuming the relative antenna height is constant) with little change in the dominant period of the SNR data, whereas changes in vegetation height are more likely to modulate the SNR-dominant period. Surface volumetric soil moisture can be estimated (R2  =  0.74, RMSE  =  0.009 m3 m−3) when the wheat is smaller than one wavelength (∼ 19 cm). The quality of the estimates markedly decreases when the vegetation height increases. This is because the reflected GNSS signal is less affected by the soil. When vegetation replaces soil as the dominant reflecting surface, a wavelet analysis provides an accurate estimation of the wheat crop height (R2  =  0.98, RMSE  =  6.2 cm). The latter correlates with modeled above-ground dry biomass of the wheat from stem elongation to ripening. It is found that the vegetation height retrievals are sensitive to changes in plant height of at least one wavelength. A simple smoothing of the retrieved plant height allows an excellent matching to in situ observations, and to modeled above-ground dry biomass