The Resource Description Framework (RDF) is the fundamental data model underlying the Semantic Web. Recently, SPARQL has been proposed as W3C standard for querying RDF repositories. As RDF is a graph-based data model, the core problem of evaluating SPARQL queries is matching query graph patterns against the data graph, which is computationally very expensive. We address this problem by indexing...

The main objective of the research was to characterize innovation network and estimate an adoption rate evaluate its relationship with income generation in quinoa producers Cabana. characterization has been carried out using social analysis methodology (SNA), index (IAI) obtained through ordinal measurement scale return level innovations on Producers' estimated two-stage least squares (TSLS) da...

The present study aimed to determine the optimum policy component in an example of potato cultivation development based on principle efficient use scarce resources and maximizing benefit producer. Agricultural support policies are commonly implemented by adopting a top-down approach. Regarding maximization at target group level, for agricultural products should be determined with bottom-up In t...

Heat-stress remains a costly issue for animal production, especially for poultry as they lack sweat glands, and alleviating heat-stress is necessary for ensuring animal production in hot environment. A high γ-aminobutyric acid (GABA)-producer Lactobacillus strain was used to investigate the effect of dietary GABA-producer on laying performance and egg quality in heat-stressed Hy-line brown hens...

Predicting soybean [Glycine max (L.) Merr.] seed yield is of interest for crop producers to make important agronomic and economic decisions. Evaluating the canopy across a range common practices, using measurements, provides large inference producers. The individual synergistic relationships between fractional green cover (FGCC), photosynthetically active radiation (PAR) interception, normalize...

We study the performance of a stylized supply chain where multiple retailers and a single producer compete in a Cournot-Stackelberg game. At time t = 0 the retailers order a single product from the producer and upon delivery at time T > 0, they sell it in the retail market at a stochastic clearance price. We assume the retailers’ profits depend in part on the realized path of some tradeable sto...

Ecosystems can undergo sudden shifts to undesirable states, but recent studies with simple single-species ecosystems have demonstrated that advance warning can be provided by the slowing down of population dynamics near a tipping point. However, it is unclear how this 'critical slowing down' will manifest in ecosystems with strong interactions between their components. Here we probe the dynamic...