A novel form of carbon micro-balls from coal

A novel form of ball-like carbon material with its size in micrometer range was prepared from coal with nickel as catalyst by arc plasma method. The carbon material has been systematically studied by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and ultraviolet laser Raman spectroscopy. The SEM observation shows that the novel carbon material exists in various forms such as individual balls, net-like and plate-like forms, all of which have a quite smooth surface. The diameters of these carbon spheres are quite uniform and in a narrow range of 10-20 mum. The EDS analysis reveals that the ball-like carbon material contains more than 99.5% of carbon and a little amount of other elements such as nickel, silicon and aluminum, The XRD and UV-Raman results reveal that the novel carbon material is a kind of highly graphitized carbon. The growth mechanism of the ball-like carbon material was proposed and discussed in terms of arc plasma parameters and the chemical structure of coal-based carbon. (C) 2002 Elsevier Science Ltd. All rights reserved.

Balls to the wall: How acoustic information from a ball in motion guides interceptive movement in people with Parkinson’s disease

Previous research has shown that Parkinson's disease (PD) patients can increase the speed of their movement when catching a moving ball compared to when reaching for a static ball (Majsak et al., 1998). A recent model proposed by Redgrave et al. (2010) explains this phenomenon with regard to the dichotomic organization of motor loops in the basal ganglia circuitry and the role of sensory micro-circuitries in the control of goal-directed actions. According to this model, external visual information that is relevant to the required movement can induce a switch from a habitual control of movement toward an externally-paced, goal-directed form of guidance, resulting in augmented motor performance (Bienkiewicz et al., 2013). In the current study, we investigated whether continuous acoustic information generated by an object in motion can enhance motor performance in an arm reaching task in a similar way to that observed in the studies of Majsak et al. (1998, 2008). In addition, we explored whether the kinematic aspects of the movement are regulated in accordance with time to arrival information generated by the ball's motion as it reaches the catching zone. A group of 7 idiopathic PD (6 male, 1 female) patients performed a ball-catching task where the acceleration (and hence ball velocity) was manipulated by adjusting the angle of the ramp. The type of sensory information (visual and/or auditory) specifying the ball's arrival at the catching zone was also manipulated. Our results showed that patients with PD demonstrate improved motor performance when reaching for a ball in motion, compared to when stationary. We observed how PD patients can adjust their movement kinematics in accordance with the speed of a moving target, even if vision of the target is occluded and patients have to rely solely on auditory information. We demonstrate that the availability of dynamic temporal information is crucial for eliciting motor improvements in PD. Furthermore, these effects appear independent from the sensory modality through-which the information is conveyed. 

Els catecismes populars de Mallorca : d'instrument pastoral a mitjà de control cultural de l'estat. 'Los catecismos populares de Mallorca : de instrumento pastoral a medio de control cultural estatal'.

Comunicación presentada al Tercer Encontre de Ciències Humanes i Socials dels Paisos Catalans, desarrollado en la Facultad de Filosofía y Letras de la Universidad de las Islas Baleares, entre diciembre de 1978 y enero de 1979

Cançons i jocs populars de les Illes Balears, 1. 'Canciones y juegos populares de las Islas Baleares, 1'.

Contiene 59 canciones infantiles y canciones populares mallorquinas para niños.

Cançons i jocs populars de les Illes Balears, 2. 'Canciones y juegos populares de las Islas Baleares, 2'.

Contiene 40 canciones infantiles y canciones populares mallorquinas para niños.

Cançons i jocs populars de les Illes Balears, 3. 'Canciones y juegos populares de las Islas Baleares, 3'.

Contiene 28 canciones infantiles y canciones populares mallorquinas para niños.

Cançons i jocs populars de les Illes Balears, 3. 'Canciones y juegos populares de las Islas Baleares, 3'.

Contiene canciones infantiles y canciones populares mallorquinas y canciones vinculadas a bailes y danzas para niños.

Danses populars de les Illes Balears. 'Danzas populares de las Islas Baleares'.

Este material reune una selección de las danzas populares más conocidas de las islas Baleares en versión para piano. El primer cd recoge 23 piezas mientras que el segundo reune 29 piezas. Los estilos recogidos son fundamentalmente la jota, la mateixa, el fandango, el bolero y el copeo. Servirá especialmente para estudiar la música popular de estas islas pero también para adentrarse en el concocimiento de la antropología cultural y el folclore de Baleares.

Cançons i jocs populars de les Illes Balears. 'Canciones y juegos populares de las Islas Baleares'.

Resumen tomado del propio recurso

Cultura popular, cultures populars i escola. 'Cultura popular, culturas populares y escuela'.

Resumen basado en el de los autores