Dissertation--Philosophische Fakultät--Köln--Universität zu Köln, 2004. / Bibliogr. p. 327-341.

Thesis (M.U.R.P. 1980) from the Department of Architecture, University of Adelaide.

No description available.

Perceptual centres, or P-centres, represent the perceptual moments of occurrence of acoustic signals - the 'beat' of a sound. P-centres underlie the perception and production of rhythm in perceptually regular speech sequences. P-centres have been model ed both in speech and non speech (music) domains. The three aims of this thesis were tost out current P-centre models to determine which best accounted for the experimental data b)to identify a candidate parameter to map P-centres onto (a local approach) as opposed to the previous global models which rely upon the whole signal to determine the P-centrethe final aim was to develop a model of P-centre location which could be applied to speech and non speech signals. The first aim was investigated by a series of experiments in whicha)speech from different speakers was nvestigated to determine whether different models could account for variation between speakersb)whether rendenng the amplitude time plot of a speech signal affects the P-centre of the signa whether increasing the amplitude at the offset of a speech signal alters P-centres in the production and perception of speech. The second aim was carried out by manipulating the rise time of different speech signals to determine whether the P-centre was affected, and whether the type of speech sound ramped affected the P-centre shift1 manipulating the rise time and decay time of a synthetic vowel to determine whether the onset alteration was had more affect on P-centre than the offset manipulationnd whether the duration of a vowel affected the P-centre, if other attributes (amplitude, spectral contents) were held constant. The third aim - modelling P-centres - was based on these results. The Frequency dependent Amplitude Increase Model of P-centre location (FAIM) was developed using a modelling protocol, the APU GammaTone Flterbank and the speech from different speakers. The P-centres of the stimuli corpus were highly predicted by attributes of the increase in amplitude within one output channel of the filterbank. When this was used to make predictions of the P-centres for all the stimuli used in the thesis, 85°c of the observed variance was accounted for. The FAIM approach combines aspects of previous speech and non speech models (Gordon 1987, Marcus 1981, Vos and Rasch 1981). P-centre were thus modelled n a non speech specific, local manner.

Thesis (M.U.R.P.) -- University of Adelaide, Department of Architecture, 1980.

No description available.

No description available.

ABSTRACT The call centre environment has become an interesting new venue for research into organisational issues, having grown extensively both internationally and in South Africa, thus playing a crucial role in most industries. In call centres where high value is placed on the meeting of targets and metrics, performance management is crucial. There are numerous differing definitions when it comes to what exactly performance management is, what these definitions have in common however is that they include one or more of the following eight constructs: control; alignment with organisational strategies; the achievement of overall goals and objectives; rewards; training; development; appraisal and motivation (Fisher, Katz, Miller and Thatcher, 2003; Amaratunga, and Baldry, 2002; Noe, Hollenbeck, Gerhart and Wright, 2003). Perceptions and definitions of performance management may vary between agents, supervisors and managers. In order to determine what perceptions employees at different levels held of performance management in call centres, the exploration of metaphors was employed as they are thought to provide a basis for uncovering perceptions, attitudes and feelings which were previously subconscious or not articulated. The aim of this research was thus to determine: what images employees use to define performance management; what similarities and differences exist in the images and definitions used by employees from different levels within the organisation; and how the images and definitions relate to constructs used to define performance management in the literature. Interviews were conducted with 18 call centre agents, 6 supervisors and 3 managers. The results revealed that employees used both negative and positive images to describe performance management, some of the images did relate to some of the eight constructs, and perceptions of performance management differed according to organisational position with supervisors and managers using more positive images to describer performance management.

Reproduction de : Thèse d'exercice : Médecine. Médecine générale : Nantes : 2008. / Bibliogr.

Reproduction de : Thèse de doctorat : Géographie, Aménagement et Urbanisme : Lyon 2 : 2005. / Titre provenant de l'écran-titre. Bibliogr.