For monaural source separation two main approaches have thus far been adopted. One approach involves applying non-negative matrix factorization (NMF) to an observed magnitude spectrogram, interpreted as a non-negative matrix. The other approach is based on the concept of computational auditory scene analysis (CASA). A CASAbased approach called the “harmonic-temporal clustering (HTC)” aims to cl...

Adrenal steroid hormones induce the synthesis of tyrosine amino-transferase (TAT) in HTC cells, an established line of rat hepatoma cells in tissue culture. The addition of insulin to cells previously induced in a serum-free medium results in a rapid two- to threefold further increase in the rate of synthesis of TAT and a small increase in total amino acid incorporation. These changes do not re...

The present study aimed to investigate the presence of compounds with antitumor activity in the plant Caesalpinia pluviosa var. peltophoroides. From bioactivity guided studies it was possible to isolate a new biflavonoid, named caesalpinioflavone, whose chemical structure was determined by spectroscopic (H and C nucler magnetic ressonace, homonuclear correlation spectroscopy and heteronuclear m...

The measurement of the oxygen stable isotope content in organic compounds has applications in many fields, ranging from paleoclimate reconstruction to forensics. Conventional High-Temperature Conversion (HTC) techniques require >20mg of O for a single dOmeasurement. Here we describe a system that converts the CO produced by HTC into CO2 via reduction within a Ni-furnace. This CO2 is then concen...

Polycyclic aromatic hydrocarbons (PAHs) are genotoxic chemicals commonly found in effluents from oil refineries. Bioassays using plants and cells cultures can be employed for assessing environmental safety and potential genotoxicity. In this study, the genotoxic potential of an oil refinery effluent was analyzed by means of micronucleus (MN) testing of Alium cepa, which revealed no effect after...

Aluminum vapor chambers have become an important component used to solve heat dissipation problems in lightweight applications due their low density and good transfer characteristics. In this paper, a new sintered aluminum powder wick is provided for chamber. An porous was using liquid phase sintering technology. Using acetone as the working medium, influence of structural parameters on its boi...

This article describes a series of experiments on gender attribution of Polish texts. The research was conducted on the publicly available corpus called “He Said She Said”, consisting of a large number of short texts from the Polish version of Common Crawl. As opposed to other experiments on gender attribution, this research takes on a task of classifying relatively short texts, authored by man...

In contrast to normal liver, it is known that in vivo hepatomas fail to decrease their rate of cholesterol biosynthesis in response to increased dietary cholesterol. From a consideration of the available data it has been hypothesized that the defect might lie in the delivery of cholesterol to the hepatoma cell. To study this further, lipoprotein interactions with rat hepatoma cells in tissue cu...

Vive la Révolution! Long Term Returns of 1968 to the Angry Students The famous events of May 1968, starting with student riots, threw France into a state of turmoil. The period of ‘revolution’ coincided with the time in which important examinations are undertaken. Normal procedures were abandoned and the pass-rate for various qualifications increased enormously. These events were particularly i...

Since the pioneering work of Simon, several avenues of research have investigated the attention structuring processes in organizations. While the research based directly on Simon's theories focused on the role of management tools in structuring attention, more recent research based on Weick's work has focused on the role of the cognitive processes of the actors rather than tools, emphasizing a ...