51 research outputs found
Factors affecting assemblage attributes of freshwater Oligochaeta in Neotropical shallow floodplain lakes
Molecular diagnosis of Hepatozoon canis in symptomatic dogs in the city of Goiania, GoiĂĄs, Brazil
Ecology of potential hosts of schistosomiasis in urban environments of Chaco, Argentina
Some of the Biomphalaria species living in Chaco, such as B. straminea and B. tenagophila, are natural transmitters of schistosomiasis in Brazil, while those of the genus Drepanotrema are not intermediate hosts of the disease. The aim of the present work was to analyze the importance of a selected set of environmental variables in explaining patterns of distributions and relative abundance of planorbid gastropod assemblages. The study sites were located in urban areas of Resistencia City, Chaco Province, and the environmental variables measured were substratum (macrophytes), water quality (pH, O2, nutrients, among others), as well as other gastropods (Ancylidae, Hydrobiidae and Ampullaridae). Seasonal samplings were carried out in four distinct environments. Thirty-one quantitative samples of gastropods and environmental variables were obtained. In canonical correspondence analysis (CCA), seven environmental variables were retained after a stepwise forward selection, from a total of 26, including [N-NH4+], O2%, and the macrophytes Eichhornia crassipes, Pistia stratiotes, Panicum elephantipes, Hydrocotyle ranunculoides and Canna glauca. They explained 62% of the variation in planorbid association. Canna glauca was the most significant variable, being positively correlated with all of the species of Drepanotrema. Axis I separates B. tenagophila from B. straminea, along a gradient related to increasing O 2% and P. elephantipes abundance, as well as decreasing [N-NH 4+] and P. stratiotes. Axis II separates D. lucidum, D. anatinum and D. cimex from the other planorbid species along a gradient associated with decreasing abundances of H. ranunculoides and C. glauca. Some common aquatic macrophytes, and to a lesser extent, dissolved oxygen and ammonium in water, may be useful indicators of favorable environmental conditions for potential intermediate hosts of schistosomiasis in Chaco Region.Fil:Ostrowski De NĂșñez, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina
Emotion in Motion: A Study of Music and Affective Response
Emotion in Motionâ is an experiment designed to understand the emotional reaction of people to a variety of musical excerpts, via self-report questionnaires and the recording of electrodermal response (EDR) and pulse oximetry (HR) signals. The experiment ran for 3 months as part of a public exhibition, having nearly 4000 participants and over 12000 listening samples.
This paper presents the methodology used by the authors to approach this
research, as well as preliminary results derived from the self-report data and the
physiology
Feeling Something without Knowing Why: Measuring Emotions toward Archetypal Content
Abstract. To enhance communication among users through technology, we propose a framework that communicates âpure experience. â This framework can be achieved by providing emotionally charged communication. To initiate this undertaking, we propose to explore materials for communicating human emotions. Research on emotion mainly focuses on emotions that are relevant to utilitarian concerns. Besides the commonly-known emotions like joy and fear, there are non-utilitarian emotions, such as aesthetic emotions, which are essential to our daily lives. Based on Jungâs theory of collective unconsciousness, we consider archetypal content as a new category of affective stimuli of non-utilitarian emotions. We collected pictures and sounds of the archetype of the self, and conducted an experiment with existing affective stimuli of utilitarian emotions. The results showed that archetypal content i
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