A Hierarchical Approach for Multi-task Logistic Regression

Peer-reviewed

Cinética e mecanismo da reação de auto-oxidação de S(IV) catalisada por íons metálicos de transição

The oxidation process of sulfur (IV) species (SO2, HSO3- e SO32-) by oxygen, catalysed by trace metal ion and complexes, can play an important role in atmospheric, analytical and bioinorganic chemistry. An overview of the most important reactions in these fields is presented. A fascinating redox cycling of the metal ions and complexes during such autoxidation process was revealed by the combination of kinetics and coordination chemistry studies.

Emprego de monocamadas auto-organizadas no desenvolvimento de sensores eletroquímicos

Self-assembled monolayers (SAMs) modified electrodes exhibit unique behavior that can greatly benefit electrochemical sensing. This brief review highlights the applications of SAM modified electrodes in electroanalytical chemistry. After a general introduction, which includes the approaches for SAM development, different electrochemical systems for detecting inorganic and organic species are described and discussed. Special attention to the coupling of biological sensing element to the SAM is given, which can selectively recognize the analyte. Future prospects are also evaluated.

Auto ja liikkeellelähtö

Auton oven avaaminen. Auton käynnistäminen ja liikkeellelähtö. Ford Cortina.

Kuorma-auto

Kuorma-auto lähtee liikkeelle vilkasliikenteiselle kadulla.

Auto

Auto lähestyy ja ajaa ohi. Ääni etääntyy.

Auto

Auto käynnistetään ja ajetaan pois.

Kuorma-auto

Kuorma-auto lähestyy hitaasti ja pysähtyy. Moottori on päällä pitkään.

Auto

Auto kiihdyttää vauhtiaan kunnes vauhti pysähtyy ja ovi avataan.

Regression analysis of compositional data when both the dependent variable and independent variable are components

It is well known that regression analyses involving compositional data need special attention because the data are not of full rank. For a regression analysis where both the dependent and independent variable are components we propose a transformation of the components emphasizing their role as dependent and independent variables. A simple linear regression can be performed on the transformed components. The regression line can be depicted in a ternary diagram facilitating the interpretation of the analysis in terms of components. An exemple with time-budgets illustrates the method and the graphical features

Auto

Henkilöauto lähestyy ja ajaa ohi.

Kuorma-auto

Kuorma-auton ovi suljetaan.

Kuorma-auto

Kuorma-auto kaasuttaa, lähtee liikkeelle ja ääni etääntyy