User participation in the design and development of Web 2.0 technologies for people with learning difficulties

In the twenty-first century People with Learning Difficulties (PWLD) still face oppression, discrimination and exclusion from the mainstream of social life. Over recent decades the policy of the United Kingdom’s (UK) government and activist organisations regarding people with learning difficulties has been on enabling inclusion, ensuring rights, providing choice and developing advocacy and independence. People with learning difficulties have been moved out of institutions with the intention to be included and respected as equal members of society. During the same decades that the government and activist organisations have been striving for the inclusion and equality of people with learning difficulties, the use of Information Technology (IT) has reached pervasive levels, to the degree that it is almost impossible for individuals to socially function successfully, unless they have access to it. Unfortunately, most IT is not designed to be usable and accessible to people with learning difficulties and this is a major barrier for their social inclusion.Participatory Design (PD) methodologies which emphasise end-user involvement in the software development process are widely considered the key to system usability and accessibility. However, most researchers and software developers believe that people with learning difficulties are not capable of participating in the process of development as a result of their disabilities. Others, report that they do not know how to work with this specific group of disabled end-users. This discriminatory behaviour is a major reason why IT remains inaccessible to people with learning difficulties. The study described in this thesis combined Evolutionary Prototyping, a software development methodology and Participatory Action Research (PAR), a social science methodology, in order to involve a cohort of four Health Trainers with learning difficulties in the development of a Web 2.0 based system. The aims of the study were to explore how people with learning difficulties could be involved in the development of a software system and if they could use a system developed with their participation. A further aim was to explore how software developers can approach the field of Learning Disability, the issues they will face and how those issues can be overcome. Qualitative data was gathered during fourteen Participatory Action Research meetings, in which the Health Trainers were involved in research, software development and system use. The data was analysed using Thematic Content Analysis facilitated by the use of the NVivo software package. The findings were validated by the participating Health Trainers.The findings suggest that during software development participation, the Health Trainers faced a number of challenges. However, the Health Trainers indicated the type of support they needed from the researcher in order to overcome them. The support required was easy to provide and the Health Trainers managed to engage in the software development process. The study conducted a system use evaluation to explore if the developed system was usable and accessible to the Health Trainers. The Health Trainers managed to complete all the system tasks posed to them during the evaluation. This suggests that the developed system was usable and accessible to the Health Trainers. Further evidence suggests that a number of factors affected the participation of the Health Trainers during development and during the use of the system. Finally, the study explored how the developed system was used over the long run, in a period of eighteen months. The findings suggest that system use over time was affected by factors other than the system’s accessibility and usability. Concluding, the findings suggest that with easy to provide support, the Health Trainers with learning difficulties could be involved in software development and they could use a system developed with their participation. It is hoped that the findings be used by policy makers and advocacy groups, to make a case towards convincing researchers and software developers to involve more people with learning difficulties in software development, thus making systems accessible to this community of end-users

Unusual intraparenchymal pontomedullary epidermoid cyst in a 2 year-old: case report and literature review.

BACKGROUND: Intrinsic brainstem epidermoid cysts are rare, benign, slow growing lesions. Their eloquence preclude complete excision, however subtotal resection will often result in prolonged or sometimes permanent relief of presenting symptoms and signs. We describe an unusual case and review the literature of this pathology in the paediatric population. CASE DESCRIPTION: We report an intra-axial pontine epidermoid cyst in a 2-year-old girl who presented with developmental delay, multiple cranial nerve palsies and pneumonia. Magnetic resonance imaging (MRI) demonstrated an intrinsic pontine lesion with partial restricted diffusion and an enhancing plaque, the latter not typically seen in congenital lesions like epidermoid. However, gross surgical inspection and histopathology confirmed an epidermoid. CONCLUSION: Our case, supported by the literature, shows that brain stem epidermoid cysts may have atypical radiological characteristics, and that near total resection remains safe and can improve outcome

Identification and Characterization of the Antibacterial Activity of Fungal Metabolites on Contaminants Responsible for Foodborne Diseases

The emergence of new diseases due to recurrent food poisoning nowadays in the face of excessive use of conventional antibiotics leads to the search for new bioactive molecules. Thus, the objective of this work was to investigate the antibacterial activity of fungal metabolites on contaminants responsible for food poisoning. To do this, Eight (08) fungal strains belonging to the genera Aspergillus, Penicillium and Nigrospora were used and antibacterial tests were performed on 4 bacterial strains (Staphylococcus aureus ATCC 25923, Shigella sp, Escherichia coli sp and Salmonella sp) using the agar cylinder method (antibiotic). The results showed that seven (07) fungal isolates have high antibacterial activity with inhibition diameters ranging from 18 to 29 mm on Staphylococcus Aureus ATCC 25923; Shigella sp; Salmonella sp and Escherichia coli. Synergistic tests have shown that the combination of 4 to 5 fungal strains could increase bacterial inhibition of Staphylococcus, Salmonella, Shigella and Escherichia coli which appear resistant to the action of a single fungal strain

Evaluation de la qualité sanitaire des poudres de feuilles de Moringa oleifera Lam. commercialisées au profit des Personnes Vivant avec le VIH à Cotonou (Bénin)

Face au péril des carences nutritionnelles, la promotion des compléments alimentaires prend de l’ampleur au Bénin. L’objectif de cette étude est d’évaluer la qualité hygiénique des poudres de feuilles de Moringa oleifera commercialisées à Cotonou. 24 échantillons ont été achetés dans 12 points de vente et soumis à des analyses de laboratoire. L’enquête a révélé que, 25% des échantillons ne sont pas scellés, 58% des emballages sont non opaques, les dates de conditionnement et dates limites d’utilisation ne figurent pas sur 50% des échantillons. 43% des poids marqués ne sont pas conformes aux poids nets réels. La concentration moyenne des germes aérobies mésophiles (1,4.106 à 3.106 UFC/g) dépasse significativement la limite maximale d’acceptation du produit au plan microbiologique. Cette insalubrité des échantillons se confirme par la forte présence de Staphylocoques à coagulase positive (3.104), Escherichia coli (1,5.103 à 30.103), levures (1,1.103 à 15.103) et moisissures (3,4.103 à 30.103) respectivement dans 100%, 92%, 50% et 17% des poudres analysées. Par ailleurs, les bactéries Anaérobies Sulfito-Réductrices sont dans les limites d’acceptation de l’aliment. Au total, l’innocuité des poudres de Moringa commercialisées n’est pas garantie et il importe que les fabricants corrigent les failles en matière d’hygiène dans le processus de fabrication.Mots clés : Moringa oleifera, Complément alimentaire, nutrition, qualité, hygiène

Removal of PCR Error Products and Unincorporated Primers by Metal-Chelate Affinity Chromatography

Immobilized Metal Affinity Chromatography (IMAC) has been used for decades to purify proteins on the basis of amino acid content, especially surface-exposed histidines and “histidine tags” genetically added to recombinant proteins. We and others have extended the use of IMAC to purification of nucleic acids via interactions with the nucleotide bases, especially purines, of single-stranded RNA and DNA. We also have demonstrated the purification of plasmid DNA from contaminating genomic DNA by IMAC capture of selectively-denatured genomic DNA. Here we describe an efficient method of purifying PCR products by specifically removing error products, excess primers, and unincorporated dNTPs from PCR product mixtures using flow-through metal-chelate affinity adsorption. By flowing a PCR product mixture through a Cu2+-iminodiacetic acid (IDA) agarose spin column, 94–99% of the dNTPs and nearly all the primers can be removed. Many of the error products commonly formed by Taq polymerase also are removed. Sequencing of the IMAC-processed PCR product gave base-calling accuracy comparable to that obtained with a commercial PCR product purification method. The results show that IMAC matrices (specifically Cu2+-IDA agarose) can be used for the purification of PCR products. Due to the generality of the base-specific mechanism of adsorption, IMAC matrices may also be used in the purification of oligonucleotides, cDNA, mRNA and micro RNAs

Anemia in relation to body mass index and waist circumference among Chinese women

Extent: 3 p.BACKGROUND: This study aimed to investigate the relationship of anemia and body mass index among adult women in Jiangsu Province, China. Data were collected in a sub-national cross-sectional survey, and 1,537 women aged 20 years and above were included in the analyses. Subjects were classified by body mass index (BMI) categories as underweight, normal weight, overweight and obese according to the Chinese standard. Central obesity was defined as a waist circumference ≥ 80 cm. Anemia was defined as hemoglobin concentration < 12 g/dl. Prevalence ratios (PRs) of the relationship between anemia and BMI or waist circumference were calculated using Poisson regression. FINDINGS: Overall, 31.1% of the Chinese women were anemic. The prevalence of overweight, obesity and central obesity was 34.2%, 5.8% and 36.2%, respectively. The obese group had the highest concentrations of haemoglobin compared with other BMI groups. After adjustment for confounders, overweight and obese women had a lower PR for anemia (PR: 0.72, 95% CI: 0.62-0.89; PR: 0.59, 95% CI: 0.43-0.79). Central obesity was inversely associated with anemia. CONCLUSION: In this Chinese population, women with overweight/obesity or central obesity were less likely to be anemic as compared to normal weight women. No measures are required currently to target anemia specifically for overweight and obese people in China.Yu Qin, Alida Melse-Boonstra, Xiaoqun Pan, Baojun Yuan, Yue Dai, Jinkou Zhao, Michael B. Zimmermann, Frans J. Kok, Minghao Zhou and Zumin Sh

Dephytinisation with Intrinsic Wheat Phytase and Iron Dephytinisation with Intrinsic Wheat Phytase and Iron Fonio (Digitaria exilis) Meals in West African Women

Low iron and high phytic acid content make fonio based meals a poor source of bioavailable iron. Phytic acid degradation in fonio porridge using whole grain cereals as phytase source and effect on iron bioavailability when added to iron fortified fonio meals were investigated. Grains, nuts and seeds collected in Mali markets were screened for phytic acid and phytase activity. We performed an iron absorption study in Beninese women (n = 16), using non-dephytinised fonio porridge (FFP) and dephytinised fonio porridge (FWFP; 75% fonio-25% wheat), each fortified with 57Fe or 58Fe labeled FeSO4. Iron absorption was quantified by measuring the erythrocyte incorporation of stable iron isotopes. Phytic acid varied from 0.39 (bambara nut) to 4.26 g/100 g DM (pumpkin seed), with oilseeds values higher than grains and nuts. Phytase activity ranged from 0.17±1.61 (fonio) to 2.9±1.3 phytase unit (PU) per g (whole wheat). Phytic acid was almost completely degraded in FWFP after 60 min of incubation (pH˜5.0, 50°C). Phytate:iron molar ratios decreased from 23.7:1 in FFP to 2.7:1 in FWFP. Iron fortification further reduced phytate:iron molar ratio to 1.9:1 in FFP and 0.3:1 in FWFP, respectively. Geometric mean (95% CI) iron absorption significantly increased from 2.6% (0.8–7.8) in FFP to 8.3% (3.8–17.9) in FWFP (