Sense and symbolic objects: Strategic sensemaking through design

This paper reports on an ongoing investigation into one aspect of the design thinking phenomenon, namely the use of designed artifacts — sketches, renderings, graphics, models and prototypes — as symbolic objects in strategy making and implementation. It examines the conceptual overlap between design and the strategic cognition perspective, which considers cognitive processes and structures involved in strategic decision making, particularly the phenomenon of sensemaking. It is primarily a theoretical exploration, but draws on two short testimonies from designers. The specific conceptual connection between design practice and strategic cognition theory is potentially valuable to business leaders and managers involved with innovation, design management and strategic decisions. Preliminary findings suggest sensemaking activities by designers generate innovative future concepts with far-reaching strategic implications; designed artifacts aid sensemaking and sensegiving by management in exploring new business opportunities and directions. This paper is an early draft of a fuller account to be published in 2013 (AIEDAM Special Issue, Spring 2013, Vol.27, No.2, Studying and Supporting Design Communication, Edited by: Maaike Kleinsmann & Anja Maier)

Post-aspiration in standard Italian

Voiceless geminate stops in Italian are typically described as unaspirated in all positions (e.g. [1, 2]). However, recent acoustic phonetic analysis of part of a corpus of standard Italian speech data has shown that the geminate voiceless stops /pp tt kk/ are frequently realized with both preaspiration i.e. [hp: ht: hk:] (cf. [3]) and post-aspiration. This paper focuses on the latter phenomenon, presenting acoustic phonetic evidence in the form of VOT duration values for /pp tt kk/ tokens recorded in 15 Italian cities (based on the CLIPS corpus of spoken Italian [4, 5]). The co-occurrence of post-aspiration with preaspiration is considered and results are discussed with a focus on regional patterns

On the Acoustic Characterization of Ejective Stops in Waima’a

We examine some acoustic properties of ejective stops in Waima’a (an Austronesian language spoken in East Timor), and compare them with other voiceless stop types that occur in the language. Previous studies of ejectives in other languages have suggested that they may fall into two classes, strong and weak. We compare our Waima’a results with some existing findings in the literature, and suggest that while Waima’a ejectives might appear to be more appropriately characterized as strong on some criteria, they do not sit squarely in either category

A preliminary investigation of some acoustic characteristics of ejectives in Waima’a: VOT and closure duration

Waima’a is a little known language spoken in East Timor. From a typological perspective, its stop system is unusual for an Austronesian language: it has a fourway stop system which includes a set of voiceless ejectives. In this paper, we report on the results of our first experimental investigation of Waima’a, in which ejectives and pulmonic voiceless aspirated and unaspirated stops are compared. After first presenting some qualitative observations about ejectives, we examine voice onset time (VOT) duration, closure duration and overall duration i.e. closure + VOT. We then turn to a cross-linguistic comparison, looking in particular at the behaviour of ejectives relative to other voiceless stop types, and at possible place of articulation dependencies concerning VOT and closure duration

Vowel duration, compression and lengthening in stressed syllables in Central and Southern varieties of standard Italian

This study is the first investigation of the effects of regional accent on temporal organization, specifically of vowel duration, in stressed syllables in standard Italian. We examine possible compression effects on the duration of stressed vowels according to word-position (final, penult and antepenult) and syllable type (open vs. closed) in central v. southern varieties of (standard) Italian. Our results show significant regional differences in some contexts, i.e. closed syllables, and antepenultimate position, but not in others. We consider the implications of our results for the phonological description and phonetic investigation of Italian, and the extent to which any such differences may be accounted for

Positional Effects on the Characterization of Ejectives in Waima’a

This paper presents results from an ongoing investigation into stop consonants in Waima’a, focusing on the issue of tense v. lax ejectives. Sources tend to describe ejectives in a given language as either tense or lax; however ejectives in Waima'a, do not fit squarely into either category [4]. Here we compare ejectives in word-initial and word-medial contexts, to specifically address the role of word-position in the tense/lax distinction. Results show that word-position affects the duration of all stop types analyzed, i.e. unaspirated, postaspirated, & ejective stops. Variability amongst the ejective tokens suggests that the notion of a tense/lax dichotomy should be replaced instead with that of a tense/lax continuum

Bondi Accretion in the Spherically Symmetric Johannsen-Psaltis Spacetime

The Johannsen-Psaltis spacetime explicitly violates the no hair theorem. It describes rotating black holes with scalar hair in the form of parametric deviations from the Kerr metric. In principle, black hole solutions in any modified theory of gravity could be written in terms of the Johannsen-Psaltis metric. We study the accretion of gas onto a static limit of this spacetime. We utilise a recently proposed pseudo-Newtonian formulation of the dynamics around arbitrary static, spherically symmetric spacetimes. We obtain a potential that generalises the Paczy\'nski-Wiita potential to the static Johannsen-Psaltis metric. We also perform a fully relativistic analysis of the geodesic equations in the static Johannsen-Psaltis spacetime. We find that positive values of the scalar hair parameter, $\epsilon_{3}$, lower the accretion rate and vice versa. Similarly, positive (negative) values of $\epsilon_{3}$ reduce (increase) the gravitational acceleration of radially infalling massive particles.Comment: 13 Pages, 1 figure, submitted to CQ

Working group written presentation: Spacecraft charging

A brief listing of the concerns of the working group on spacecraft charging is presented. Brief conclusions for each concern is also given

High voltage system: Plasma interaction summary

The possible interactions that could exist between a high voltage system and the space plasma environment are reviewed. A solar array is used as an example of such a system. The emphasis in this review is on the discrepancies that exist in this technology in both flight and ground experiment data. It has been found that, in ground testing, there are facility effects, cell size effects and area scaling uncertainties. For space applications there are area scaling and discharge concerns for an array as well as the influence of the large space structures on the collection process. There are still considerable uncertainties in the high voltage-space plasma interaction technology even after several years of effort