نتایج جستجو برای: and inventories
تعداد نتایج: 16827590 فیلتر نتایج به سال:
A new species of Espeletia from the Páramo de Presidente in northeastern Colombia is described. The species is named Espeletia praesidentis after the name of the páramo, and it is dedicated to the President Juan Manuel Santos, for his persistent efforts in working for peace for Colombia. The new species is closely related to Espeletia dugandii, but differs in the shape and colour of the leaves ...
Bioturbation, the biogenic modification of sediments through particle reworking and burrow ventilation, is a key mediator of many important geochemical processes in marine systems. In situ quantification of bioturbation can be achieved in a myriad of ways, requiring expert knowledge, technology, and resources not always available, and not feasible in some settings. Where dedicated research prog...
During 2000-2002, shortages of numerous routinely administered pediatric vaccines occurred. The reasons for these shortages were varied, but they included policy, manufacturing, and regulatory issues. The use of government manufacturing programs has been proposed as a way to stabilize the fragile vaccine supply and to prevent periodic shortages. Although such programs might be useful for defens...
We consider a firm which sells a product with a limited inventory over a finite sales horizon. In addition to the inventory level and time, the firm also sets its prices based on customer signals, which are quantified scores of relevant information about the customers and are correlated with customers’ reservation prices. We investigate the properties of “ideal” customer signals, i.e., signals ...
2 UNCERTAINTIES ASSOCIATED WITH GHG INVENTORIES..................................................2 2.1 LIMITATIONS AND PURPOSES OF UNCERTAINTY QUANTIFICATION....................................................3 2.2 PARAMETER UNCERTAINTIES: SYSTEMATIC AND STATISTICAL UNCERTAINTIES...............................3 3 AGGREGATING STATISTICAL UNCERTAINTY .................................................
This paper proposes a method of distinguishing between the effect of anticipated and unanticipated changes in oil prices and oil inventories on the US gasoline prices. I show that gasoline price adjustments are faster and stronger for anticipated changes in oil prices and inventory levels than for unanticipated changes. The dynamics of the gasoline price response depends on the relative importa...
now a days, management and control of perishable inventories is important in many units and industrial enterprises. basically perishable inventory management and control is more complex and challenging than inventories with unlimited lifetime. hence determining the optimal inventory policies for these products is very important. in this paper, the optimal inventory policy for perishable items ...
this research provides an optimization tool for use by supply chain managers in the design and operation of manufacturing- distribution networks under uncertain demand conditions. the problem under consideration consists of determining the supply chain infrastructure; raw material purchases, shipments, and inventories; and finished product production quantities, inventories, and shipments neede...
Most ecological hypotheses about species coexistence hinge on species differences, but quantifying trait differences across species in diverse communities is often unfeasible. We examined the variation of demographic traits using a global tropical forest data set covering 4500 species in 10 large-scale tree inventories. With a hierarchical Bayesian approach, we quantified the distribution of mo...
Activity concentrations, inventories and activity ratios of (137)Cs, (238)Pu, (239 + 240)Pu and (241)Am in soil profiles were surveyed in the dry tundra and the adjoining proglacial zones of glaciers at a High Arctic site on Svalbard. Vertical profiles of radionuclide activities were determined in up to 14-cm-thick soil sequences. Additionally, soil properties (pH, organic matter, texture, mine...
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