Interactive visual analysis of families of function graphs

The analysis and exploration of multidimensional and multivariate data is still one of the most challenging areas in the field of visualization. In this paper, we describe an approach to visual analysis of an especially challenging set of problems that exhibit a complex internal data structure. We describe the interactive visual exploration and analysis of data that includes several (usually large) families of function graphs f_i(x, t). We describe analysis procedures and practical aspects of the interactive visual analysis specific to this type of data (with emphasis on the function graph characteristic of the data). We adopted the well-proven approach of multiple, linked views with advanced interactive brushing to assess the data. Standard views such as histograms, scatterplots, and parallel coordinates are used to jointly visualize data. We support iterative visual analysis by providing means to create complex, composite brushes that span multiple views and that are constructed using different combination schemes. We demonstrate that engineering applications represent a challenging but very applicable area for visual analytics. As a case study, we describe the optimization of a fuel injection system in diesel engines of passenger cars     

Unexpected products of the allyldiethylamine hydroformylation homogeneously catalyzed by rhodium complexes

Attempts to carry out the hydroformylation of allyldiethylamine homogeneously catalyzed by rhodium complexes led to unexpected formation of N,N,N,N-tetraethyl-1,4-diaminobutane and 4-(diethylamino)-1-butanole as final products. The role of the catalyst on the product formation and the reaction mechanism are briefly discussed.     

Characteristic measure of the departure from the eddy-viscosity model

Summary There is presented a direct evaluation of the departure from the eddy-viscosity model. This, widely used, concept of a clear physical meaning has usually been tested experimentally via simultaneous turbulence modelling of an eddy-viscosity coefficient _T . Hence, the effect of the basic model assumption remains more or less latent. In the following we propose a characteristic measure for a direct determination of the departure from the eddy-viscosity model, i.e. independently from the choice of _T -modelling from a great variety of available forms.     

Changes in hemocoagulation in children with cranio-cerebral trauma

The authors monitored in children with craniocerebral injuries hospitalized in their department in the course of the more than one-year existence of the child ARO ward in addition to other vital parameters also changes of the haemocoagulation system. They describe the majority of commonly observed abnormalities as "latent consumption coagulopathy", where laboratory findings are not associated with clinical signs of coagulopathy. On the other end of the spectrum of coagulopathies after head injuries is the unit of disseminated consumption coagulopathy which is generally evaluated as a secondary phenomenon or as an intermediary mechanism of the disease which complicates various pathological conditions incl. craniocerebral injuries. The authors discuss the pathophysiology, diagnostic possibilities and their experience with the treatment of the mentioned disorders.     

Effects of humidity changes on damping and stress relaxation in wood

Mechanical damping (tan ) and stress relaxation on pine veneer samples under stepwise humidity changes were investigated. The loss factor shows a transient peak every time the relative humidity (RH) of the surrounding atmosphere is changed. The effect appears to be associated with the diffusion of water molecules into or out of the material, the peaks being observed both when the sample is humidified (5%–85% RH) or subjected to drying. The results are supplemented by stress relaxation data obtained on similar specimens. Also in this case a higher relaxation rate is observed when the RH level around the sample is changed, the total stress decrease after several cycles being significantly larger than the corresponding value observed after the same period at the higher RH level.     

Approach to the Cuban scientific activity by using publication based quantitative indicators (1985–1989)

An estimation about Cuban scientific productivity based on output indicators during the period 1985–1989 is provided. Nine international bibliographic databases and three Cuban repertories have been used. Except for journal articles, no other type of Cuban document gets worldwide recognition as they are not generally included in the international databases. The greater effort in research is made in Agriculture, Biomedicine, Chemistry and Engineering, but this last topic does not reach international visibility, since the majority of its results are published in local journals. The Cuban contribution to the mainstream of world science is increasing annually. Collaboration in high level research projects existed mainly between Cuba and either USSR, German Democratic Republic and Italy. The most productive Cuban institutions in collaborative programs are the Havana University and the Academy of Sciences.     

Conversion electron Mössbauer spectroscopy of the surface crystallization of the Fe75Co9B16 amorphous alloy

Using a new design of helium-methane gas-flow detector of conversion electrons for Mössbauer spectroscopy, non-uniform nucleation of the primary -Fe-Co phase on both contact and free surfaces of the Ar(+H₂) annealed amorphous Fe₇₅Co₉B₁₆ alloy was observed in its early crystallization stage. In this state the amount of crystalline phase on the contact ribbon side surpasses that on the free one by a factor of three, whereas no traces of volume crystallization were observed in the transmission spectra. By applying ion implantation to both ribbon surfaces, a slight reduction of the crystalline phase contribution was found. Magnetic domain structure observations were performed in order to evaluate the influence of surface crystallization on magnetic properties.     

Satisfiability of co-nested formulas

As a notion dual to Knuth's nested formulas [4], we call a boolean formula in conjunctive normal formco-nested if its clauses can be linearly ordered (sayC={c _i ;i=1,2, ...,n})so that the graphG ^cl =(XC, {xc _i ;xc _i or ¬xc _i } {c _i c _i+1;i=1, 2, ...,n}) allows a noncrossing drawing in the plane so that the circlec ₁,c ₂, ...,c _n bounds the outerface. Our main result is that maximum satisfiability of co-nested formulas can be decided in linear time.Both authors acknowledge a partial support of Ec Cooperative Action IC-1000 (project ALTEC:Algorithms for Future Technologies).