1,549 research outputs found
Analysis of human scream and its impact on text-independent speaker verification
No full textScream is defined as sustained, high-energy vocalizations that lack phonological structure. Lack of phonological structure is how scream is identified from other forms of loud vocalization, such as "yell." This study investigates the acoustic aspects of screams and addresses those that are known to prevent standard speaker identification systems from recognizing the identity of screaming speakers. It is well established that speaker variability due to changes in vocal effort and Lombard effect contribute to degraded performance in automatic speech systems (i.e., speech recognition, speaker identification, diarization, etc.). However, previous research in the general area of speaker variability has concentrated on human speech production, whereas less is known about non-speech vocalizations. The UT-NonSpeech corpus is developed here to investigate speaker verification from scream samples. This study considers a detailed analysis in terms of fundamental frequency, spectral peak shift, frame energy distribution, and spectral tilt. It is shown that traditional speaker recognition based on the Gaussian mixture models-universal background model framework is unreliable when evaluated with screams. © 2017 Author(s)."This work was supported in part by the Air Force Research Laboratory under Contract No. FA8750-15-1-0205."Erik Jonsson School of Engineering and Computer ScienceCenter for Robust Speech System
Analyzing social media networks with NodeXL : insights from a connected world / Derek L. Hansen, Ben Schneiderman, Marc A. Smith.
No full textcomputer bookfair2015Includes bibliographical references and index.xv, 284 pages
Hérnia discal Hansen tipo I em cães: abordagem diagnóstica e terapêutica
No full textO presente trabalho
inicia se com uma análise casuística dos casos acompanhados
pela autora durante o seu estágio na Lagos Veterinary Clinic, com destaque para cães e gatos
A segunda parte do relatório apresenta uma monografia referente
à hérnia disca l
Hansen tipo I em cães , doença esta que pode progredir rapidame nte e tornar se numa
condição grave e limitante
Na
última parte do trabalho analisa se o caso clínico de um cão acompanhado durante
o estágio que se integra numa das áreas de interesse da autora a neurologia diagnosticado
com hérnia discal Hansen tipo I. Este capítulo do trabalho termina com uma discussão dos
pontos positivos e negativos da abordagem escolhida, tendo em conta o que poderia ter sido
feito melhor à luz da evidência científica; Abstract:
Hansen type I disc hernia in dogs : diagnostic and therapeutic
approach
This work
starts with an analysis of the cases followed up by the author during her
internship at Lagos Veterinary Clinic , particularly dogs and cats.
The second part presents a
brief literature on Hansen type I herniated disc in dogs, a
disease that can progress rapidly and become a serious and limiting condition.
The last part of
this report analyzes the clinical case of a d og that was accompanied
during the internship, which i ntegrates in one of the author's areas of interest neurology
diagnosed with Hansen type I disc herniation. This chapter ends with a discussion of the
positive and negative points of the chosen appro ach, considering what could have been done
better in the light of scientific evidence
Print journal holdings in two Canadian consortial projects
No full textThe Canadian university library members of two consortial e-journal arrangements were surveyed to determine how many of the corresponding print journals had been cancelled as a result of participation in the online packages. The survey results indicated that the number of current print subscriptions held by the libraries had notably decreased. This paper discusses this loss of print and presents two options, with examples, for dealing with the archiving of print journals, Distributed Print Archiving and Back-up Repositories. The question of whether anything really needs to be done is also addressed
Single- and Multi-carrier Quadrature Amplitude Modulation: Principles and Applications for Personal Communications, WATM and Broadcasting: 2nd
No full textSingle- and Multi-carrier Quadrature Amplitude Modulation Principles and Applications for Personal Communications, WLANs and Broadcasting L. Hanzo Department of Electronics and Computer Science, University of Southampton, UK W. Webb Motorola, Arlington Heights, USA formerly at Multiple Access Communications Ltd, Southampton, UK T. Keller Ubinetics, Cambridge Technology Centre, Melbourn, UK formerly at Department of Electronics and Computer Science, University of Southampton, UK Motivated by the rapid evolution of wireless communication systems, this expanded second edition provides an overview of most major single- and multi-carrier Quadrature Amplitude Modulation (QAM) techniques commencing with simple QAM schemes for the uninitiated through to complex, rapidly-evolving areas, such as arrangements for wide-band mobile channels. Targeted at the more advanced reader, the multi-carrier modulation based second half of the book presents a research-orientated outlook using a variety of novel QAM-based arrangements. * Features six new chapters dealing with the complexities of multi-carrier modulation which has found applications ranging from Wireless Local Area Networks (WLAN) to Digital Video Broadcasting (DVB) * Provides a rudimentary introduction for readers requiring a background in the field of modulation and radio wave propagation * Discusses classic QAM transmission issues relevant to Gaussian channels * Examines QAM-based transmissions over mobile radio channels * Incorporates QAM-related orthogonal techniques, considers the spectral efficiency of QAM in cellular frequency re-use structures and presents a QAM-based speech communications system design study * Introduces Orthogonal Frequency Division Multiplexing (OFDM) over both Gaussian and wideband fading channels By providing an all-encompassing self-contained treatment of single- and multi- carrier QAM based communications, a wide range of readers including senior undergraduate and postgraduate students, practising engineers and researchers alike will all find the coverage of this book attractive
Phelea breviceps Hansen 1999
No full textPhelea breviceps Hansen, 1999 (Figs. 1–20) Phelea breviceps Hansen, 1999 a: 128. Phelea breviceps: Hansen (1999 b: 118, catalogue), Watts (2002: 93, notes on morphology and biology), Komarek & Beutel (2007: 221, phylogenetic analysis confirming assignment to the Anacaenini). Type locality. Australia, Tasmania, northern side of Cradle Mt., ca. 1370 m a.s.l. [ca. 41 ° 40.8 ʹS 145 °57.0ʹE]. Type material examined. Holotype: female (MCZ): “N. side of CradleMtTas / c 4500 ʹ Feb 57 / Darlingtons // HOLOTYPE / Phelea breviceps / M. Hansen [red label, handwritten] // MCZ TYPE / 35208 [red label, partly handwritten] // Aug–Dec 2005 / MCZ Image / Database”. Additional material examined. AUSTRALIA: Tasmania: 1 male (BMNH): “N. W. Tasmania / Cradle Valley / 3000 feet / 27.i. 1923 // Brit. Mus. / 1925 – 220 [GPS coordinates probably ca. 41 ° 38.5 ʹS 145 ° 57.5 ʹE]”; 8 females, 1 male, 2 unsexed specimens (SAMA): western side of Cradle Mt., i. 1959, in a shallow pond/tarn beside the overland track, 41 ° 42 ′ 36 ″ S 145 ° 56 ′ 16 ″E, leg. C.H.S. Watts. Complementary description (only taxonomically/phylogenetically important characters not mentioned by Hansen (1999 a) listed here): Head subquadrate in dorsal view, clypeus arcuately excised when seen in frontodorsal or frontal views (Figs. 1, 5); labrum large, strongly sclerotized, deflexed into a vertical position and hence well visible in frontal view only (Figs. 1, 2, 5, 7– 8), bearing a transverse row of setae dorsally along anterior margin (Fig. 8); apical maxillary palpomere with a few digitiform sensilla on dorsoposterior face (Fig. 11); trichobothria present on clypeus, frons and pronotum (not examined on elytra), basal socket large but ca. of the size of surrounding punctation and hence not distinguishable from it under binocular microscope, hairs of trichobotria moderately long and rather stout (Fig. 9, 13); lateral glabrous portion of prothoracic hypomeron very wide, defined from pubescent portion by a ridge anteriorly (Figs. 3, 12); mesoventrite without distinct median posterior bulge and anterior pits or ridges (Figs. 3, 17, 19); mesofurca with short arms, dorsal projection connecting them with dorsal body wall absent; aedeagus (Fig. 4) 0.7 mm long, weakly sclerotized, phallobase long and wide, with large and wide, but distinctly detached manubrium, parameres distinctly shorter than the main part of phallobase (i.e. not considering manubrium), weakly sinuate on outer margin, angulate on inner margin apically, bearing numerous pore-like sensilla on the whole surface, median lobe much longer than parameres, slightly longer than main part of phallobase, gradually narrowing towards apex, with apical gonopore and basal struts slightly longer than body of median lobe. Diagnosis. Phelea breviceps is easy-to-recognize from other hydrophilid genera by the uniformly dark dorsal coloration (it is frequently even darker than in the illustrated specimen), rather compressed body, quadrate head with large fully sclerotized labrum which is deflexed and hence fully seen in frontal view only, mesoventrite nearly flat, without median projection, and by the unique pattern of abdominal pubescence (pubescence covering basal 2.5 ventrites, its posterior limit forms a bisinuate pattern on ventrite 3, and ventrites 4 and 5 are bare, just with few spine-like setae posteriorly; Figs. 3, 20). Distribution and biology. The species seems to be extremely restricted in distribution, as all known specimens were collected in close vicinity to Cradle Mt. in the western part of the mountain range in central Tasmania between ca. 900 and 1300 m a. s. l. (Fig. 6). Collecting circumstances are unknown for the holotype and the additional specimen from BMNH. Last known record of the species is from 1959 when a short series of that species was collected by the second author from small tarns on the plateau at the base of Cradle Mt. This may prove that the species is aquatic. On the other hand, the partly reduced ventral hydrophobic pubescence (absent in metafemora and part of abdominal ventrites, Figs. 3, 14, 20) may indicate that the species may be hygropetric, i.e. inhabiting wet places but normally not submerged underwater (e.g. in the similar way as in anacaenine genera Pseudorygmodus and Horelophus, see Fikáček et al. 2012 and Fikáček & Vondráček 2014). No specimens were collected after 1959, despite the efforts of C. Watts and L. Hendrich in similar habitats across Tasmania (but the 1959 collecting site was never re-visited as it is not easy to access). Comments on the phylogenetic position. Phelea was assigned to the Anacaenini in its original description by Hansen (1999 a) and later confirmed as a member of the tribe by Komarek & Beutel (2007) who considered it as a member of the basal anacaenine stock together with Crenitis. For this study we examined the external morphology and genitalia, studies on the structure of the mouthparts or the use of DNA were impossible due to a limited number of old specimens available. The absence of long mesofurca definitely excludes Phelea from a position within any group of the Hydrophilinae. Within the remaining hydrophilid groups, the absence of the scutellary stria and the presence of digitiform sensilla on the apical maxillary palpomere indicates the position within the subfamily Chaetarthriinae, and the absence of an abdominal fringe of setae excludes assignment to the Chaetarthriini (see the discussion in Fikáček & Vondráček 2014 for details). Phelea also agrees with most anacaenine genera in the presence of a transverse row of setae on the labrum (character 11 in Komarek & Beutel 2007, overlooked for Phelea by the authors but actually present in this genus, see Fig. 8). The assignment to the Anacaenini hence seems well justified. Within Anacaenini, Phelea strongly resembles some members of Crenitis s.str. in the general body shape, large deflexed labrum, wide mentum with nearly straight anterior margin, pronotum with bisinuate posterior margin and lateral impressions (present in some Crenitis only, Komarek & Beutel 2007), absence of the accessory ridge below posterior margin of pronotum, wide horizontal epipleura (Fig. 18), the shape of the mesoventrite (with only slightly sinuate anapleural sutures meeting together at anterior margin of mesothorax), more-or-less cylindrical metatibiae and a large manubrium on the phallobase (see e.g. Ji & Komarek 2003). Some of these characters are also shared with the New Zealand endemic Horelophus which, moreover, has a very similar morphology of the aedeagus (with wide but short parameres and very long phallobase, see Fikáček et al. 2012). Horelophus also agrees with Phelea completely in wing venation (compare drawings in Hansen (1999 a) and Fikáček et al. (2012)) and shares with Phelea the presence of short club-like setae arising from dorsal punctures. On the other hand, Phelea does not seem to have modified setae on the male pro- and mesotarsi (Figs. 15–16) which are present in male Horelophus. Nevertheless, it seems justified to consider Phelea tentatively as a member of the Horelophus - Crenitis clade of the Anacaenini. Thanks to its autapomorphies (quadrate head, limited pubescence of the abdomen) and the morphology of mesoventrite (flat, without transverse ridge), Phelea is easily recognizable from Crenitis. Additional effort is however needed to understand its phylogenetic position and the relationship to Crenitis.Published as part of Fikáček, Martin & Watts, Chris H. S., 2015, Notes on the Australian Anacaenini (Coleoptera: Hydrophilidae): description of male of Phelea breviceps Hansen and unravelling the identity of Crenitis neogallica Gentili, pp. 427-434 in Zootaxa 3980 (3) on pages 428-430, DOI: 10.11646/zootaxa.3980.3.6, http://zenodo.org/record/24477
Enhancement of Consonant Recognition in Bimodal and Normal Hearing Listeners
No full textDue to copyright restrictions and/or publisher's policy full text access from Treasures at UT Dallas is limited to current UTD affiliates (use the provided Link to Article).Objectives: The present study investigated the effects of 3-dimensional deep search (3DDS) signal processing on the enhancement of consonant perception in bimodal and normal hearing listeners. Methods: Using an articulation-index gram and 3DDS signal processing, consonant segments that greatly affected performance were identified and intensified with a 6-dB gain. Then consonant recognition was measured unilaterally and bilaterally before and after 3DDS processing both in quiet and noise. Results: The 3DDS signal processing provided a benefit to both groups, with greater benefit occurring in noise than quiet. The benefit rendered by 3DDS was the greatest in binaural listening condition. Ability to integrate acoustic features across ears was also enhanced with 3DDS processing. In listeners with normal hearing, manner and place of articulation were improved in binaural listening condition. In bimodal listeners, voicing and manner and place of articulation were also improved in bimodal and hearing aid ear–alone conditions. Conclusions: Consonant recognition was improved with 3DDS in both groups. This observed benefit suggests 3DDS can be used as an auditory training tool for improved integration and for bimodal users who receive little or no benefit from their current bimodal hearing. © The Author(s) 2019.Erik Jonsson School of Engineering and Computer ScienceSchool of Behavioral and Brain SciencesCallier Center for Communication Disorder
Contemporary American opinion of the New Harmony Movement
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Correction to: Investigations of the relics and altar materials relating to the apostles St James and St Philip at the Basilica dei Santi XII Apostoli in Rome (Heritage Science, (2021), 9, 1, (14), 10.1186/s40494-021-00481-9)
No full textFollowing publication of the original article [1], the authors identified an error in an author’s name. The incorrect name was: Erika Ribercini. The correct author name is: Erika Ribechini. The author group has been updated above and the original article [1] has been corrected
Contemporary American opinion of the New Harmony Movement
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