A queue scheduling approach to quality of service support in diff-serv networks using fuzzy logic

In this paper, the fuzzy logic-based decision algorithm is proposed for queue scheduling. This algorithm is employed to determine the optimal values for achieving fairness control for each queue-type serviced. It takes into account the dynamic nature of the internet traffic as regards to its time-varying packet arrival process that affects the network states and performance. In order that the fairness control is achieved some predetermined threshold values are set so as to enforce some level of control in the router for traffics of different quality of service requirements. The threshold values are set for queue priority, drop priority and the number of waiting packets in queue (queue limit). The fuzzy scheduling mechanism is proposed for implementation at the output port of the internet router. Three (3) queues are assumed, low priority queue, medium priority queue and high priority queue, which takes the form q0, q1 and q2, respectively. All the queues are subject to priority, that is, packets are placed in the queues according to their priority class by the classifier. The choice of prioritizing packets influences how queues are served but unlike the priority queue (PQ) scheduling mechanism, which only schedules packets based on priority, the fuzzy scheduler utilizes queue priority, drop priority and the queue limit as parameters for queue scheduling. Through simulation experiments, it is found that the effectiveness of the proposed method proves to offer better improvement for network performance in terms of traffic dropped and throughput

Carbon auditing in tree-soil nexus: a sustainable approach towards CO2 sequestration and environmental transformation

Anomalies in climatic behavior is threatening various aspects of life including environmental degradation, food insecurity, and widespread of diseases. The continual build-up of atmospheric carbon dioxide (CO2) and other malpractices are among the factors responsible for ecosystem degradation. Field experimentation was conducted, where stratified random sampling was employed to delineate point were Phoenix dactylifera and Mangifera indica was sampled. Experimental point was replicated twice where moist soil was examined for its organic matter and organic carbon content, before and after the experiment. The textural class of the area using USDA textural model after laboratory analysis indicated soils of University of Abuja, Federal Capital Territory of Nigeria ranging from loam to sandy-loam soils. Laboratory fractionalization indicated that the soils of the area has coarse sand value (1.8 g kg-1), fine sand content ranging from (4.5 – 5.2 g kg-1), silt content at (4.5 – 5.2g kg-1) and clay content at (72 g kg-1). Estimation analysis revealed that the organic matter and organic carbon content of the area is low to moderately low. Results of the study revealed that Phoenix dactylifera and Mangifera indica was able to sequester carbon in the form of CO2 which was audited in the form of soil organic carbon (SOC). The study thereby encourages the cultivation of Phoenix dactylifera and Mangifera indica which is not onlyeconomic trees that produce food or fuelwood, but as a climate change tool that could be used to regulate climate change in the form of CO2 sequestration

Mapping soil organic carbon-soil biodiversity variability in the ecosystem-nexus of tropical soils

It is no more news that the deterioration of our mother Earth has resulted in many hardships faced in many lands of the world. Research statistics has shown that about 80% of the environmental problems faced in Asia, especially the loss of soil biodiversity results from deforestation. Africa has been intensely affected by the hazards of climate change at a rate of more than 50%, also Near East and North Africa has recorded more than 48% loss of her biodiversity in soils due to habitat alteration and loss. This list is inexhaustive and heart-broken, presenting a view that if sustainable remediation is not taken then we will have more malnourished and sick people in years to come, our environment will be more polluted and toxic, our water system will become more and more difficult to remediate, there could be increase in local, national and international conflict among other unforeseen unpleasant happenings. To contribute as a modality towards solving this problem this study investigated the current soil organic carbon-soil biodiversity variability in the ecosystem-nexus of soils. The study took place within the University of Abuja landmass. Spatial and temporal data were collected on earth-system properties, were analysis and simulations were done. The Area was model and interpolated to find hot spots with grave threat. Explorative and descriptive statistics was applied in the study. Results indicated that the soils of the study area are compacted and hence unfit to support sustainable survival of the living entities within the soil system, with soil Bulk density value range at 2.1g cm-3–2.71g cm-3. Organic carbon of the area was low. Geotechnical and geomorphological evaluation and interactions revealed only two (2) points having earthworm length of 1 cm which presented a view that the soils spore is too tight to enable sustainable flourishing of below and above ground biodiversity in the sites investigated. Hence ecological tool like the use of Vetiver Grass Technology was recommended for the study area environmental regeneration and for healing the soils impediment

Status of the World’s Soil Resources Main report

The SWSR will constitute the reference document on the status of global soil resources with a strong regional assessment on soil change. The information is based on peer-reviewed scientific literature, complemented with expert knowledge and reliable project outputs (mainly FAO ones). It provides a description and a ranking of ten major soil threats that endanger ecosystem functions, goods and services globally and in each region separately. Additionally, it describes direct and indirect pressure son soils and ways and means to combat soil degradation at all levels. The report contains a Synthesis report for policy makers that summarizes its findings, conclusions and recommendations.UCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Agroalimentarias::Centro de Investigaciones Agronómicas (CIA)UCR::Vicerrectoría de Docencia::Ciencias Agroalimentarias::Facultad de Ciencias Agroalimentarias::Escuela de Agronomí

Etat des Ressources en Sols dans le Monde (Résumé technique)

Etat des Ressources en Sols dans le Monde (Résumé technique

World’s soils are under threat

The Intergovernmental Technical Panel on Soils has completed the first State of the World's Soil Resources Report. Globally soil erosion was identified as the gravest threat, leading to deteriorating water quality in developed regions and to lowering of crop yields in many developing regions. We need to increase nitrogen and phosphorus fertilizer use in infertile tropical and semi-tropical soils – the regions where the most food insecurity among us are found – while reducing global use of these products overall. Stores of soil organic carbon are critical in the global carbon balance, and national governments must set specific targets to stabilize or ideally increase soil organic carbon stores. Finally the quality of soil information available for policy formulation must be improved – the regional assessments in the State of the World's Soil Resources Report frequently base their evaluations on studies from the 1990s based on observations made in the 1980s or earlier.European Commission/[]//BélgicaUCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Agroalimentarias::Centro de Investigaciones Agronómicas (CIA