美卓新型Nordberg C130型颚式破碎机

颚式破碎机的破碎腔体积对破碎效率至关重要。与同规格的上一款机型相比，美卓新推出的NordbergC130型颚式破碎机的破碎腔体积增大21％，一次可破碎更多的矿石；其超大的给料口，可确保在恶劣工况下拥有更高产量。     

Bioavailability of organic pollutants in boreal waters with varying levels of dissolved organic material

Dissolved organic matter (DOM) in 20 surface waters in Eastern Finland were characterized to examine relationships between structural and compositional properties of DOM and partition coefficients (K_p) describing sorption of four model contaminants to DOM and the bioavailability of contaminants by Daphnia magna. The hydrophobic acids (HbA), hydrophobic neutrals (HbN) and hydrophilic (HI) fractions of DOM were separated by XAD-8 resin. The K_Ps were measured by equilibrium dialysis. Model contaminants were benzo(a)pyrene (BaP), naphthalene (NAPH), 3.3′,4.4′-tetrachlorobiphenyl (TCB) and dehydroabietic acid (DHAA).DOM concentrations varied from 2.0 to 38.3 mg org. C/l in the water series. The percentage of HbA and the aromaticity of DOM, as indicated by the absorptivity at 270 nm (A₂₇₀) and hydrogen/carbon ratio (H/C ratio), increased with increasing DOM concentration. Significant correlations were observed between K_P of BAP, A₂₇₀ and HbA content of the DOM from different sources. For the other contaminants similar kinds of relationships between K_ps and quality parameters of DOM could not be found.The bioavailability of model compounds was decreased by increasing DOM concentration in the water series. For all four model contaminants, measured bioconcentration factors (BCF) correlated well with the A₂₇₀ of a water and HbA content of the DOM. These results show that the total DOM concentration is an important factor controlling the bioavailability of xenobiotics in natural waters. Besides the quantity also the quality of DOM, like proportion of HbA, can contribute in bioavailability.     

The Ty?h?n Job Search Program in Finland: Benefits for the unemployed with risk of depression or discouragement.

The impact of preventive interventions for the unemployed may vary depending on the context of the labor policies and benefit systems of the country where it is implemented. The Ty?h?n Job Search Program was based on a method developed in the United States for recently unemployed workers. This study examined outcomes of the intervention in the context of the European labor market for participants who had been unemployed for a longer period. A total of 1,261 unemployed Finnish job seekers participated in a randomized field study. At the 6-month follow-up, the program had a beneficial impact on the quality of reemployment, especially among those who had been unemployed for a moderate time period. The program also significantly decreased psychological distress. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

An integrity filter for recursive subdivision meshes

We present a filter, i.e., a simple program operating on a sequential file and requiring little internal storage, for mending “cracks” between patches formed by recursively subdividing a parametric surface. Our approach shows how various new encoding schemes and processing techniques related to quadtrees can be transposed into the setting of recursive subdivision surfaces.     

Predicting the spatial pattern of trees by airborne laser scanning

The spatial pattern of trees can be defined as a property of their location in relation to each other. In this study, the spatial pattern was summarized into three categories, regular, random, and clustered, using Ripley's L-function. The study was carried out at 79 sample plots located in a managed forest in Finland. The goal was to study how well the spatial pattern of trees can be predicted by airborne laser scanning (ALS) data. ALS-derived predictions were based upon individual tree detection (ITD), semi-individual tree detection (semi-ITD), and plot-level metrics calculated from the canopy height model, AREA. The kappa value for ITD was almost zero, which indicates no agreement. The semi-ITD and AREA methods performed better, although kappa values were only 0.34 and 0.24, respectively. It appears difficult to detect a particularly clustered spatial pattern.     

Assembling approximately optimal binary search trees efficiently using arithmetics

We introduce a new algorithm for computing an approximately optimal binary search tree with known access probabilities or weights on items. The algorithm is simple to implement and it has two contributions. First, a randomized variant of the algorithm produces a binary search tree with expected performance that improves the previous theoretical guarantees (the performance is dependent on the value of the input random variable). More precisely, if p is the probability of accessing an item, then under expectation the item is found after searching lg1/p+0.087+lg₂(1+pmax) nodes, where pmax is the maximal probability among items. The previous best bound was lg1/p+1, albeit deterministic. For the optimal tree our upper bound implies a non-constructive performance bound of H+0.087+lg₂(1+pmax), where H is the entropy on the item distribution and the previous bound was H+1. The second contribution of the algorithm is a low cost in i/o models of cost such as the cache-oblivious model, while attaining simultaneously the above bound for the produced tree.     

Promotion of breast feeding: effect on neonates of change of feeding routine at a maternity unit

The effect on the health of neonates of a change in neonatal routine care, including general rooming-in, breast feeding on demand and avoidance of supplementary bottle feeding was studied in conjunction to a breast feeding campaign at a maternity unit. There was an accentuated weight loss in the neonatal period during ad libitum breast feeding. The mean serum bilirubin of clinically jaundiced infants was slightly higher on a 4-hourly feeding schedule with supplementary bottles than on the new regimen. There was a similar high (32-33%) incidence of bilirubin levels greater than 205 mumol/l (12 mg/100 ml) in both groups. The incidence of spontaneous hypoglycaemia did not differ in the two groups. The new feeding regimen was thus considered safe. Infants at risk for hypoglycaemia were given supplementary bottles and were excluded from the study.     

The role of utility models in patent filing strategies: evidence from European countries

We examine the role of utility models (UM) in patent filing strategies. With an extensive patent family data from European countries, we explore the structures and characteristics of patent families, which include UMs. A simple typology of patent families with UM members is introduced. We document that the geographical scope of most patent families with UM members is purely national, which is in line with the conventional view that the UM mechanism covers technologically and economically marginal inventions. However, the image of a UM as a signal of a minor invention is an oversimplification. Applicants exhibit a mixture of uses for the UM and there exists a subset of UM filings linked to inventions the inventive step of which meets or exceeds the threshold required for patent protection. Some UMs are members of international patent families, indicating that applicants may have some strategic motives to use UMs in international filing. The findings highlight that both types of IPR documents (UMs and patents) should be taken into account when working with data on patent families, analyzing patent filing strategies, and constructing patent-based indicators such as patenting propensities.     

Recovering gold from copper concentrate via the HydroCopper™ process

HydroCopper? technology comprises a chloride-leaching method for copper sulfide concentrates and copper production up to semi-products. As compared with the commonly used sulfate solutions, brine solutions offer aggressiveness and stability of the copper(I) ion and, consequently, a lower energy consumption in leaching. Copper(II) ions and oxygen are used as oxidants. Iron reports to the leaching residue as oxide and sulfur as elemental sulfur. Gold is dissolved and recovered in the third stage of the counter-current leaching when the redox potential reaches higher levels.