651 research outputs found

    Dynamics of Biomedical Networks

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    Drivers of Smallholder Plantation Forestry in the Tano North District of Ghana

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    Adoption of smallholder plantations in off-forest reserve among farmers has always been a challenge. Using the qualitative methods and survey among 193 smallholder plantations farmers through simple random sampling from six communities in the Tano North District, the study aimed at exploring the drivers for smallholder plantation forestry in the Tano North District of the Brong-Ahafo Forest Region of Ghana. The findings showed that as age of farmers increased, the number of plantations owned reduced. Surprisingly, all the plantations owned by farmers were teak. In addition, a significant relationship between gender of farmers and factors that motivated them to establish smallholder plantations was identified. Furthermore, the relationship between gender and land tenure systems was significant. The study identified low price for teak wood, absence of standard price for teak wood, decline in food crop yield due to canopy closure of teak stands, lack of capital to invest in teak plantation, lack of extension services from Forest Services Division and wildfire as the factors that militate against smallholder plantation forestry. The motivating factors for smallholder plantation forestry were financial returns, plantation as collateral to secure loans, hobby and construction material for subsistence use.  The identified drivers if taken into account during the implementation of smallholder forestry could enhance its viability and adoption. Keywords: gender, land tenure, land size, age, militating factors, relationship DOI: 10.7176/JNSR/10-6-04 Publication date:March 31st 202

    Impact of dietary iron intake on anaemia in Tanzanian schoolchildren

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    Objective. To investigate the nutritional relationship between dietary intake and prevalence of anaemia among Tanzanian schoolchildren. Methods. Dietary intakes of 101 schoolchildren aged 7 - 12 years were assessed using a pre-tested food frequency questionnaire. Haemoglobin (Hb), haematocrit, erythrocyte protoporphyrin (EP) and serum ferritin (SF) were used to determine their anaemia and iron status. Other socio-economic variables were collected using a profile questionnaire. Results. Significantly lower intake of iron was seen in 48% of schoolchildren with Hb 0.05). In stepwise multiple regression analysis, daily iron intake remained the most significant nutrient predicting for Hb status. There was a significant correlation between iron intake and serum ferritin (r = 0.233, p < 0.05). Conclusion. Iron intake in this Tanzanian community is inadequate for maintaining normal iron nutrition. The factors contributing to the inadequacy include consumption of foods with low iron bioavailability. Food-based intervention should be one of the important strategies for reducing the magnitude of the problem of anaemia in this community. South African Journal of Clinical Nutrition Vol.17(3) 2004: 94-10

    HIV Point Of Care Diagnostics: Meeting The Special Needs Of Sub-Saharan Africa

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    Sub-Saharan Africa, accounting for 70% of the 35 million people living with HIV worldwide, obviously carries the heaviest burden of the HIV epidemic. Moreover, the region’s poor health system occasioned by limited resources and inadequate skilled clinical personnel usually makes decentralization of HIV care difficult. Therefore, quality diagnostics that are easy to use, inexpensive, and amenable for use at point of care (POC) are a dire necessity. Clearly, such diagnostics will significantly lessen the pressure on the existing over-stretched centralized HIV laboratory services. Thankfully, some POC diagnostics are already being validated, while others are in the pipeline. As POC test kits emerge, implementation hurdles should be envisaged and planned for. This review examines emerging HIV diagnostic platforms, HIV POC product pipelines, gaps, perceived POC implementation challenges, and general recommendations for quality care.</jats:p

    SOCIAL PRACTICES AND ETHNIC IDENTITY OF BEKWARRA MIGRANT WORKERS IN ONDO AND NASARAWA STATES, NIGERIA, 1940-2015

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    Bekwarra migrants, wherever they settle in good numbers, engage in undying social practices that maintain their distinct ethnic identity. Such social practices include cultural dance, traditional marriage, New Yam Festivals, Age Grade system, burial rites and work songs. These practices perform functions that range from maintenance of their ethnic identity, socialization and enculturation of their children, social cohesion and literary aesthetics. This paper, using functionalism as its theoretical framework, examines such practices as are obtained in Ondo State in South West geographical zone and Nasarawa State in North Central geographical zones of Nigeria where they form clusters of populations that play prominent roles in socio-economic and political roles in their host states. The paper concludes that the maintenance of ethnic identity among the rural migrants in Nigeria is a social security system that served the purpose of giving them self-identity in a hyper, multi-ethnically complex country

    Oculomotor and linguistic processing effects in reading dynamic horizontally scrolling text.

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    Two experiments are reported investigating oculomotor behavior and linguistic processing when reading dynamic horizontally scrolling text (compared to reading normal static text). Three factors known to modulate processing time in normal reading were investigated: Word length and word frequency were examined in Experiment 1, and target word predictability in Experiment 2. An analysis of global oculomotor behavior across the 2 experiments showed that participants made fewer and longer fixations when reading scrolling text, with shorter progressive and regressive saccades between these fixations. Comparisons of the linguistic manipulations showed evidence of a dissociation between word-level and sentence-level processing. Word-level processing (Experiment 1) was preserved for the dynamic scrolling text condition with no difference in length and frequency effects between scrolling and static text formats. However, sentence-level integration (Experiment 2) was reduced for scrolling compared to static text in that we obtained no early facilitation effect for predictable words under scrolling text conditions

    Web 2.0 and folksonomies in a library context

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    This is the post-print version of the Article. The official published version can be accessed from the link below - Copyright @ 2011 ElsevierLibraries have a societal purpose and this role has become increasingly important as new technologies enable organizations to support, enable and enhance the participation of users in assuming an active role in the creation and communication of information. Folksonomies, a Web 2.0 technology, represent such an example. Folksonomies result from individuals freely tagging resources available to them on a computer network. In a library environment folksonomies have the potential of overcoming certain limitations of traditional classification systems such as the Library of Congress Subject Headings (LCSH). Typical limitations of this type of classification systems include, for example, the rigidity of the underlying taxonomical structures and the difficulty of introducing change in the categories. Folksonomies represent a supporting technology to existing classification systems helping to describe library resources more flexibly, dynamically and openly. As a review of the current literature shows, the adoption of folksonomies in libraries is novel and limited research has been carried out in the area. This paper presents research into the adoption of folksonomies for a University library. A Web 2.0 system was developed, based on the requirements collected from library stakeholders, and integrated with the existing library computer system. An evaluation of the work was carried out in the form of a survey in order to understand the possible reactions of users to folksonomies as well as the effects on their behavior. The broad conclusion of this work is that folksonomies seem to have a beneficial effect on users’ involvement as active library participants as well as encourage users to browse the catalogue in more depth

    Cat and mouse search: the influence of scene and object analysis on eye movements when targets change locations during search

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    We explored the influence of early scene analysis and visible object characteristics on eye movements when searching for objects in photographs of scenes. On each trial, participants were shown sequentially either a scene preview or a uniform grey screen (250 ms), a visual mask, the name of the target and the scene, now including the target at a likely location. During the participant's first saccade during search, the target location was changed to: (i) a different likely location, (ii) an unlikely but possible location or (iii) a very implausible location. The results showed that the first saccade landed more often on the likely location in which the target re-appeared than on unlikely or implausible locations, and overall the first saccade landed nearer the first target location with a preview than without. Hence, rapid scene analysis influenced initial eye movement planning, but availability of the target rapidly modified that plan. After the target moved, it was found more quickly when it appeared in a likely location than when it appeared in an unlikely or implausible location. The findings show that both scene gist and object properties are extracted rapidly, and are used in conjunction to guide saccadic eye movements during visual search

    Randomized Efficacy Trial of a Micronutrient-Fortified Beverage in Primary School Children in Tanzania.

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    Dietary supplements providing physiologic amounts of several micronutrients simultaneously have not been thoroughly tested for combating micronutrient deficiencies. We determined whether a beverage fortified with 10 micronutrients at physiologic doses influenced the iron and vitamin A status and growth of rural children (aged 6-11 y) attending primary schools. In this randomized, double-blind, placebo-controlled efficacy trial, children were assigned to receive the fortified beverage or an unfortified beverage at school for 6 mo. There were nonsignificant differences at baseline between children in the fortified and nonfortified groups in iron status, serum retinol, and anthropometry. At the 6-mo follow-up, among children with anemia (hemoglobin < 110 g/L), there was a significantly larger increase in hemoglobin concentration in the fortified group than in the nonfortified group (9.2 and 0.2 g/L, respectively). Of those who were anemic at baseline, 69.4% in the nonfortified group and 55.1% in the fortified group remained anemic at follow-up (RR: 0.79), a cure rate of 21%. The prevalence of children with low serum retinol concentrations (< 200 microg/L) dropped significantly from 21.4% to 11.3% in the fortified group compared with a nonsignificant change (20.6% to 19.7%) in the nonfortified group. At follow-up, mean incremental changes in weight (1.79 compared with 1.24 kg), height (3.2 compared with 2.6 cm), and BMI (0.88 compared with 0.53) were significantly higher in the fortified group than in the nonfortified group. The fortified beverage significantly improved hematologic and anthropometric measurements and significantly lowered the overall prevalence of anemia and vitamin A deficiency

    Individual differences in search and monitoring for color targets in dynamic visual displays

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    Many jobs now involve the monitoring visual representations of data that change over time. Monitoring dynamically changing displays for the onset of targets can be done in two ways: detecting targets directly post their onset or predicting their onset from the prior state of distractors. In the present study, participants? eye movements were measured as they monitored arrays of 108 colored squares whose colors changed systematically over time. Across three experiments, the data show that participants detected the onset of targets both directly and predictively. Experiments 1 and 2 showed that predictive detection was only possible when supported by sequential color changes that followed a scale ordered in color space. Experiment 3 included measures of individual differences in working memory capacity (WMC) and anxious affect and a manipulation of target prevalence in the search task. It found that predictive monitoring for targets, and decisions about target onsets, were influenced by interactions between individual differences in verbal and spatial WMC and intolerance of uncertainty, a characteristic that reflects worry about uncertain future events. The results have implications for the selection of individuals tasked with monitoring dynamic visual displays for target onsets
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