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https://www.readbyqxmd.com/read/29457708/stress-enhanced-interlayer-exchange-coupling-and-optical-mode-fmr-frequency-in-self-bias-fecob-ru-fecob-trilayers
#1
Shandong Li, Guo-Xing Miao, Derang Cao, Qiang Li, Jie Xu, Zheng Wen, Youyong Dai, Shi-Shen Yan, Yueguang Lü
Nowadays, the most popular method to increase ferromagnetic resonance (FMR) frequency (fr ) in self-bias soft magnetic films is to improve the anisotropy field HK . However, to push fr to higher frequencies only via raising HK becomes increasingly challenging since fr is already higher than 10 GHz by now. In this study, we fabricated a series of magnetically anisotropic FeCoB/Ru/FeCoB sandwich films possessing antiferromagnetic-like coupling and gradually increased uniaxial stress in the FeCoB sublayers from 52 to 110 MPa...
February 19, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29457587/power-cavitation-guided-blood-brain-barrier-opening-with-focused-ultrasound-and-microbubbles
#2
Mark T Burgess, Iason Zacharias Apostolakis, Elisa E Konofagou
Image-guided monitoring of microbubble-based focused ultrasound (FUS) therapies relies on the accurate localization of FUS-stimulated microbubble activity (i.e. acoustic cavitation). Passive cavitation imaging with ultrasound arrays can achieve this, but with insufficient spatial resolution. In this study, we address this limitation and perform high-resolution monitoring of acoustic cavitation-mediated blood-brain barrier (BBB) opening with a new technique called power cavitation imaging. By synchronizing the FUS transmit and passive receive acquisition, high-resolution passive cavitation imaging was achieved by using delay and sum (DAS) beamforming with absolute time delays...
February 19, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29457553/the-difficulty-of-articulatory-complexity
#3
Marianne Pouplier, Stefania Marin, Alexei Kochetov
In our commentary, we offer some support for the view that frequency rather than a language-independent definition of complexity is a main factor determining speech production in healthy adults. We further discuss the limits of defining articulatory complexity based on transcription data. If we want to gauge the impact of substantive constraints on speech production, context-specific production dynamics should be considered, as has been underscored by articulatory-acoustic work on speech errors.
October 2017: Cognitive Neuropsychology
https://www.readbyqxmd.com/read/29457539/vocalization-development-in-common-marmosets-for-neurodegenerative-translational-modeling
#4
Corinne A Jones, Mary K Duffy, Sarah A Hoffman, Nancy J Schultz-Darken, Katarina M Braun, Michelle R Ciucci, Marina E Emborg
Objectives In order to facilitate the study of vocalizations in emerging genetic common marmoset models of neurodegenerative disorders, we aimed to analyze call-type changes across age in a translational research environment. We hypothesized that acoustic parameters of vocalizations would change with age, reflecting growth of the vocal apparatus and a maturation of control needed to make adult-like calls. Methods Nineteen developing common marmosets were longitudinally video- and audio-recorded between the ages of 1-149 days in a naturalistic setting without any vocalization elicitation protocol...
February 19, 2018: Neurological Research
https://www.readbyqxmd.com/read/29456954/comparison-of-the-transient-evoked-otoacoustic-emissions-teoaes-and-distortion-products-otoacoustic-emissions-dpoaes-in-normal-hearing-subjects-with-and-without-tinnitus
#5
Maryam Emadi, Mohammad Rezaei, Sirvan Najafi, Ali Faramarzi, Farhad Farahani
The aim of this study was to investigate the possible role of cochlear outer hair cell function with TEOAE and DPOAE tests in patients with normal hearing and tinnitus. 25 tinnitus patients with normal hearing sensitivity selected as study group. Control group consist of 50 normal hearing subjects without tinnitus. All subjects had thresholds below 25 dBHL at frequencies 250-8,000 Hz, tympanogram type A and normal acoustic reflex thresholds. TEOAE were recorded with click stimulus at 80 dB SPL at 1,000, 2,000, 3,000 and 4000 Hz...
March 2018: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/29456945/audiological-profile-in-primary-sj%C3%A3-gren-s-syndrome-in-a-tertiary-care-setting-and-its-clinical-implications
#6
C V Thanooja, Ann Mary Augustine, Anjali Lepcha, Pulukool Sandhya, Amit Kumar Tyagi, Debashish Danda, Achamma Balraj
This study aims to assess the frequency and the profile of hearing loss among patients with primary Sjögren's syndrome in a tertiary care hospital in India and to look for an association between hearing loss and immunological parameters (anti-SSA antibody, anti-SSB antibody, anticardiolipin antibodies, complements C3 and C4). This prospective observational study was done from January 2011 to October 2011 on consecutive patients diagnosed with primary Sjögren's syndrome in our tertiary care hospital. All patients underwent a puretone audiogram, tympanogram and acoustic reflex testing...
March 2018: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/29456486/generic-hrtfs-may-be-good-enough-in-virtual-reality-improving-source-localization-through-cross-modal-plasticity
#7
Christopher C Berger, Mar Gonzalez-Franco, Ana Tajadura-Jiménez, Dinei Florencio, Zhengyou Zhang
Auditory spatial localization in humans is performed using a combination of interaural time differences, interaural level differences, as well as spectral cues provided by the geometry of the ear. To render spatialized sounds within a virtual reality (VR) headset, either individualized or generic Head Related Transfer Functions (HRTFs) are usually employed. The former require arduous calibrations, but enable accurate auditory source localization, which may lead to a heightened sense of presence within VR. The latter obviate the need for individualized calibrations, but result in less accurate auditory source localization...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29456268/evidence-for-ubiquitous-preferential-particle-orientation-in-representative-oceanic-shear-flows
#8
Aditya R Nayak, Malcolm N McFarland, James M Sullivan, Michael S Twardowski
In situ measurements were undertaken to characterize particle fields in undisturbed oceanic environments. Simultaneous, co-located depth profiles of particle fields and flow characteristics were recorded using a submersible holographic imaging system and an acoustic Doppler velocimeter, under different flow conditions and varying particle concentration loads, typical of those found in coastal oceans and lakes. Nearly one million particles with major axis lengths ranging from ∼14 μm to 11.6 mm, representing diverse shapes, sizes, and aspect ratios were characterized as part of this study...
January 2018: Limnology and Oceanography
https://www.readbyqxmd.com/read/29456200/diagnostic-validity-of-methods-for-assessment-of-swallowing-sounds-a-systematic-review
#9
Karinna Veríssimo Meira Taveira, Rosane Sampaio Santos, Bianca Lopes Cavalcante de Leão, José Stechman Neto, Leandro Pernambuco, Letícia Korb da Silva, Graziela De Luca Canto, André Luís Porporatti
INTRODUCTION: Oropharyngeal dysphagia is a highly prevalent comorbidity in neurological patients and presents a serious health threat, which may lead to outcomes of aspiration pneumonia, ranging from hospitalization to death. This assessment proposes a non-invasive, acoustic-based method to differentiate between individuals with and without signals of penetration and aspiration. OBJECTIVE: This systematic review evaluated the diagnostic validity of different methods for assessment of swallowing sounds, when compared to Videofluroscopic of Swallowing Study (VFSS) to detect oropharyngeal dysphagia...
February 3, 2018: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/29455232/startle-reflex-modulation-by-affective-face-emoji-pictographs
#10
Anton Aluja, Ferran Balada, Eduardo Blanco, Ignacio Lucas, Angel Blanch
The current research was designed to assess possible differences in the emotional content of pleasant and unpleasant face emoji using acoustically evoked eyeblink startle reflex response. Stimuli were selected from Emojipedia Webpage. First, we assessed these stimuli with a previous independent sample of 190 undergraduate students (46 males and 144 females) mean age of 21.43 years (SD 3.89). A principal axis method was performed using the 30 selected emoji faces, extracting two factors (15 pleasant and 15 unpleasant emoji)...
February 17, 2018: Psychological Research
https://www.readbyqxmd.com/read/29454176/efficacy-of-intensive-voice-feminisation-therapy-in-a-transgender-young-offender
#11
Sterling Quinn, Nathaniel Swain
Research suggests that transgender young offenders are a uniquely vulnerable caseload that may benefit from speech pathology intervention to help bring their voice into alignment with their gender identity. However, no previous studies have investigated treatment efficacy in this population. This study investigated the impact of intensive voice feminisation therapy targeting fundamental frequency and oral resonance in a 17 year old transgender individual within a youth justice institution. Acoustic analysis, listener and self-ratings of vocal femininity, self-ratings of vocal satisfaction, a post-treatment structured interview, and pre- and post- treatment completion of the Transsexual Voice Questionnaire (TVQ MtF ) were utilised to determine treatment impact...
February 8, 2018: Journal of Communication Disorders
https://www.readbyqxmd.com/read/29453493/altered-prepulse-inhibition-of-the-acoustic-startle-response-in-bdnf-deficient-mice-in-a-model-of-early-postnatal-hypoxia-implications-for-schizophrenia
#12
Juan M Lima-Ojeda, Anne S Mallien, Christiane Brandwein, Undine E Lang, Dimitri Hefter, Dragos Inta
The brain-derived neurotrophic factor (BDNF) is a major proliferative agent in the nervous system. Both BDNF-deficiency and perinatal hypoxia represent genetic/environmental risk factors for schizophrenia. Moreover, a decreased BDNF response to birth hypoxia was associated with the disease. BDNF expression is influenced by neuronal activity and environmental conditions such as hypoxia. Thus, it may partake in neuroprotective and reparative mechanisms in acute or chronic neuronal insults. However, the interaction of hypoxia and BDNF is insufficiently understood and the behavioral outcome unknown...
February 16, 2018: European Archives of Psychiatry and Clinical Neuroscience
https://www.readbyqxmd.com/read/29451220/critical-role-of-sdf-1-cxcr4-signaling-pathway-in-stem-cell-homing-in-the-deafened-rat-cochlea-after-acoustic-trauma
#13
Ali Asghar Peyvandi, Navid Ahmady Roozbahany, Hassan Peyvandi, Hojjat-Allah Abbaszadeh, Niloofar Majdinasab, Mohammad Faridan, Somayeh Niknazar
Previous animal studies have shown that stromal cell-derived factor-1 (SDF-1)/CXC chemokine receptor-4 (CXCR4) signaling pathway plays an important role in the targeted migration of bone marrow-derived mesenchymal stem cells (BMSCs) to the injured area. In the present study, we aimed to investigate the potential role of chemotactic SDF-1/CXCR4 signaling pathway in the homing of transplanted BMSCs to the injured cochlea after noise-induced hearing loss (NIHL) in a rat model. White noise exposure (110 dB) paradigm was used for hearing loss induction in male rats for 6 hours in 5 days...
January 2018: Neural Regeneration Research
https://www.readbyqxmd.com/read/29451107/bilaterally-combined-electric-and-acoustic-hearing-in-mandarin-speaking-listeners-the-population-with-poor-residual-hearing
#14
Duo-Duo Tao, Ji-Sheng Liu, Zhen-Dong Yang, Blake S Wilson, Ning Zhou
The hearing loss criterion for cochlear implant candidacy in mainland China is extremely stringent (bilateral severe to profound hearing loss), resulting in few patients with substantial residual hearing in the nonimplanted ear. The main objective of the current study was to examine the benefit of bimodal hearing in typical Mandarin-speaking implant users who have poorer residual hearing in the nonimplanted ear relative to those used in the English-speaking studies. Seventeen Mandarin-speaking bimodal users with pure-tone averages of ∼80 dB HL participated in the study...
January 2018: Trends in Hearing
https://www.readbyqxmd.com/read/29450493/the-impact-of-age-background-noise-semantic-ambiguity-and-hearing-loss-on-recognition-memory-for-spoken-sentences
#15
Margaret A Koeritzer, Chad S Rogers, Kristin J Van Engen, Jonathan E Peelle
Purpose: The goal of this study was to determine how background noise, linguistic properties of spoken sentences, and listener abilities (hearing sensitivity and verbal working memory) affect cognitive demand during auditory sentence comprehension. Method: We tested 30 young adults and 30 older adults. Participants heard lists of sentences in quiet and in 8-talker babble at signal-to-noise ratios of +15 dB and +5 dB, which increased acoustic challenge but left the speech largely intelligible...
February 15, 2018: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/29449298/clinical-validation-of-a-public-health-policy-making-platform-for-hearing-loss-evotion-protocol-for-a-big-data-study
#16
Giorgos Dritsakis, Dimitris Kikidis, Nina Koloutsou, Louisa Murdin, Athanasios Bibas, Katherine Ploumidou, Ariane Laplante-Lévesque, Niels Henrik Pontoppidan, Doris-Eva Bamiou
INTRODUCTION: The holistic management of hearing loss (HL) requires an understanding of factors that predict hearing aid (HA) use and benefit beyond the acoustics of listening environments. Although several predictors have been identified, no study has explored the role of audiological, cognitive, behavioural and physiological data nor has any study collected real-time HA data. This study will collect 'big data', including retrospective HA logging data, prospective clinical data and real-time data via smart HAs, a mobile application and biosensors...
February 15, 2018: BMJ Open
https://www.readbyqxmd.com/read/29449062/acoustic-and-perceptual-analyses-of-adductor-spasmodic-dysphonia-in-mandarin-speaking-chinese
#17
Zhipeng Chen, Jingyuan Li, Qingyi Ren, Pingjiang Ge
OBJECTIVE: The objective of this study was to examine the perceptual structure and acoustic characteristics of speech of patients with adductor spasmodic dysphonia (ADSD) in Mandarin. STUDY DESIGN: Case-Control Study MATERIALS AND METHODS: For the estimation of dysphonia level, perceptual and acoustic analysis were used for patients with ADSD (N = 20) and the control group (N = 20) that are Mandarin-Chinese speakers. For both subgroups, a sustained vowel and connected speech samples were obtained...
February 12, 2018: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/29449060/the-aprosody-of-schizophrenia-computationally-derived-acoustic-phonetic-underpinnings-of-monotone-speech
#18
Michael T Compton, Anya Lunden, Sean D Cleary, Luca Pauselli, Yazeed Alolayan, Brooke Halpern, Beth Broussard, Anthony Crisafio, Leslie Capulong, Pierfrancesco Maria Balducci, Francesco Bernardini, Michael A Covington
OBJECTIVE: Acoustic phonetic methods are useful in examining some symptoms of schizophrenia; we used such methods to understand the underpinnings of aprosody. We hypothesized that, compared to controls and patients without clinically rated aprosody, patients with aprosody would exhibit reduced variability in: pitch (F0), jaw/mouth opening and tongue height (formant F1), tongue front/back position and/or lip rounding (formant F2), and intensity/loudness. METHODS: Audiorecorded speech was obtained from 98 patients (including 25 with clinically rated aprosody and 29 without) and 102 unaffected controls using five tasks: one describing a drawing, two based on spontaneous speech elicited through a question (Tasks 2 and 3), and two based on reading prose excerpts (Tasks 4 and 5)...
February 12, 2018: Schizophrenia Research
https://www.readbyqxmd.com/read/29448739/bandgap-tunability-of-transition-metal-dichalcogenide-atomic-layers
#19
Quinton Rice, Bagher Tabibi, Felix Jaetae Seo
The temperature-dependent bandgap of transition metal dichalcogenides (TMDCs, MX2; M = Mo or W; X = S, Se, or Te) is analyzed using the O'Donnell and Chen relation with parameters including the average acoustic phonon energy (〈ħω〉) and the electron-phonon coupling strength (s). Wider (narrower) tunability of the bandgap results from the larger (smaller) electron-phonon coupling strength for a constant acoustic phonon energy. A 1.5 eV bandgap change was observed for weak electron-phonon coupling (s = 2) as well as with the strong electron-phonon coupling (s = 30)...
March 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29448460/correlation-versus-randomization-of-jerky-flow-in-an-almgsczr-alloy-using-acoustic-emission
#20
T A Lebedkina, D A Zhemchuzhnikova, M A Lebyodkin
Jerky flow in solids results from collective dynamics of dislocations which gives rise to serrated deformation curves and a complex evolution of the strain heterogeneity. A rich example of this phenomenon is the Portevin-Le Chatelier effect in alloys. The corresponding spatiotemporal patterns showed some universal features which provided a basis for a well-known phenomenological classification. Recent studies revealed peculiar features in both the stress serration sequences and the kinematics of deformation bands in Al-based alloys containing fine microstructure elements, such as nanosize precipitates and/or submicron grains...
January 2018: Physical Review. E
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