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https://www.readbyqxmd.com/read/28335471/mobile-phonocardiogram-diagnosis-in-newborns-using-support-vector-machine
#1
Amir Mohammad Amiri, Mohammadreza Abtahi, Nick Constant, Kunal Mankodiya
Phonocardiogram (PCG) monitoring on newborns is one of the most important and challenging tasks in the heart assessment in the early ages of life. In this paper, we present a novel approach for cardiac monitoring applied in PCG data. This basic system coupled with denoising, segmentation, cardiac cycle selection and classification of heart sound can be used widely for a large number of the data. This paper describes the problems and additional advantages of the PCG method including the possibility of recording heart sound at home, removing unwanted noises and data reduction on a mobile device, and an intelligent system to diagnose heart diseases on the cloud server...
March 18, 2017: Healthcare (Basel, Switzerland)
https://www.readbyqxmd.com/read/28335239/a-flexible-360-degree-thermal-sound-source-based-on-laser-induced-graphene
#2
Lu-Qi Tao, Ying Liu, Zhen-Yi Ju, He Tian, Qian-Yi Xie, Yi Yang, Tian-Ling Ren
A flexible sound source is essential in a whole flexible system. It's hard to integrate a conventional sound source based on a piezoelectric part into a whole flexible system. Moreover, the sound pressure from the back side of a sound source is usually weaker than that from the front side. With the help of direct laser writing (DLW) technology, the fabrication of a flexible 360-degree thermal sound source becomes possible. A 650-nm low-power laser was used to reduce the graphene oxide (GO). The stripped laser induced graphene thermal sound source was then attached to the surface of a cylindrical bottle so that it could emit sound in a 360-degree direction...
June 7, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335033/lingual-alveolar-contact-pressure-during-speech-in-amyotrophic-lateral-sclerosis-preliminary-findings
#3
Jeff Searl, Stephanie Knollhoff, Richard J Barohn
Purpose: This preliminary study on lingual-alveolar contact pressures (LACP) in people with amyotrophic lateral sclerosis (ALS) had several aims: (a) to evaluate whether the protocol induced fatigue, (b) to compare LACP during speech (LACP-Sp) and during maximum isometric pressing (LACP-Max) in people with ALS (PALS) versus healthy controls, (c) to compare the percentage of LACP-Max utilized during speech (%Max) for PALS versus controls, and (d) to evaluate relationships between LACP-Sp and LACP-Max with word intelligibility...
March 23, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/28334741/benchmarks-for-measurement-of-duplicate-detection-methods-in-nucleotide-databases
#4
Qingyu Chen, Justin Zobel, Karin Verspoor
Duplication of information in databases is a major data quality challenge. The presence of duplicates, implying either redundancy or inconsistency, can have a range of impacts on the quality of analyses that use the data. To provide a sound basis for research on this issue in databases of nucleotide sequences, we have developed new, large-scale validated collections of duplicates, which can be used to test the effectiveness of duplicate detection methods. Previous collections were either designed primarily to test efficiency, or contained only a limited number of duplicates of limited kinds...
January 8, 2017: Database: the Journal of Biological Databases and Curation
https://www.readbyqxmd.com/read/28334383/a-critical-role-of-inhibition-in-temporal-processing-maturation-in-the-primary-auditory-cortex
#5
Dongqin Cai, Rongrong Han, Miaomiao Liu, Fenghua Xie, Ling You, Yi Zheng, Limin Zhao, Jun Yao, Yiwei Wang, Yin Yue, Christoph E Schreiner, Kexin Yuan
Faithful representation of sound envelopes in primary auditory cortex (A1) is vital for temporal processing and perception of natural sounds. However, the emergence of cortical temporal processing mechanisms during development remains poorly understood. Although cortical inhibition has been proposed to play an important role in this process, direct in-vivo evidence has been lacking. Using loose-patch recordings in rat A1 immediately after hearing onset, we found that stimulus-following ability in fast-spiking neurons was significantly better than in regular-spiking (RS) neurons...
March 1, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28334346/directional-asymmetries-in-vowel-perception-of-adult-nonnative-listeners-do-not-change-over-time-with-language-experience
#6
Buddhamas Pralle Kriengwatana, Paola Escudero
Purpose: This study tested an assumption of the Natural Referent Vowel (Polka & Bohn, 2011) framework, namely, that directional asymmetries in adult vowel perception can be influenced by language experience. Method: Data from participants reported in Escudero and Williams (2014) were analyzed. Spanish participants categorized the Dutch vowels /aː/ and /ɑ/ in 2 separate sessions: before and after vowel distributional training. Sessions were 12 months apart. Categorization was assessed using the XAB task, where on each trial participants heard 3 sounds sequentially (first X, then A, then B) and had to decide whether X was more similar to A or B...
March 23, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/28334326/allelopathy-mediated-competition-in-microbial-mats-from-antarctic-lakes
#7
Marc Slattery, Michael P Lesser
Microbial mats are vertically stratified communities that host a complex consortium of microorganisms, dominated by cyanobacteria, that compete for available nutrients and environmental niches, within these extreme habitats. The Antarctic Dry Valleys near McMurdo Sound include a series of lakes within the drainage basin that are bisected by glacial traverses. These lakes are traditionally independent, but recent increases in glacial melting have allowed two lakes (Chad and Hoare) to become connected by a meltwater stream...
February 18, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28334311/flight-performance-of-ctenoplusia-agnata-lepidoptera-noctuidae
#8
Xiaowei Fu, Shengyuan Zhao, Chao Li, Xiao Wu, Jianglong Guo, Kongming Wu
Ctenoplusia agnata (Staudinger) (Lepidoptera: Noctuidae) is a highly destructive polyphagous pest of cotton, maize, soybean, and cruciferous vegetables in East Asia. The effect of various biotic and abiotic factors on the flight performance of C. agnata is crucial for a better understanding of its transregional migration. In this study, the flight performance of C. agnata moths at different ages, temperatures, and relative humidity (RH) levels, was examined by tethering individual moths to computerized flight mills for a 24-h scotophase...
March 13, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334281/blocking-c-fos-expression-reveals-the-role-of-auditory-cortex-plasticity-in-sound-frequency-discrimination-learning
#9
Livia de Hoz, Dorota Gierej, Victoria Lioudyno, Jacek Jaworski, Magda Blazejczyk, Hugo Cruces-Solís, Anna Beroun, Tomasz Lebitko, Tomasz Nikolaev, Ewelina Knapska, Israel Nelken, Leszek Kaczmarek
The behavioral changes that comprise operant learning are associated with plasticity in early sensory cortices as well as with modulation of gene expression, but the connection between the behavioral, electrophysiological, and molecular changes is only partially understood. We specifically manipulated c-Fos expression, a hallmark of learning-induced synaptic plasticity, in auditory cortex of adult mice using a novel approach based on RNA interference. Locally blocking c-Fos expression caused a specific behavioral deficit in a sound discrimination task, in parallel with decreased cortical experience-dependent plasticity, without affecting baseline excitability or basic auditory processing...
March 17, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28334090/detection-of-tones-masked-by-fluctuating-noise-in-rat-auditory-cortex
#10
Itai Hershenhoren, Israel Nelken
Sounds in natural settings always appear over a noisy background. The masked threshold of a pure tone in white noise (the lowest sound level at which the tone can be detected in the presence of masking noise) is largely determined by energy masking in the peripheral auditory system: when the signal-to-noise ratio within a frequency band centered at the target tone frequency is large enough, the tone can be detected. However, when additional information is supplied to the auditory system, for example in the presence of slow and coherent modulations of a broadband masker (often found in natural sounds), masked thresholds can be reduced substantially below the values expected from pure energy masking...
October 13, 2016: Cerebral Cortex
https://www.readbyqxmd.com/read/28333967/reconstructing-spectral-cues-for-sound-localization-from-responses-to-rippled-noise-stimuli
#11
A John Van Opstal, Joyce Vliegen, Thamar Van Esch
Human sound localization in the mid-saggital plane (elevation) relies on an analysis of the idiosyncratic spectral shape cues provided by the head and pinnae. However, because the actual free-field stimulus spectrum is a-priori unknown to the auditory system, the problem of extracting the elevation angle from the sensory spectrum is ill-posed. Here we test different spectral localization models by eliciting head movements toward broad-band noise stimuli with randomly shaped, rippled amplitude spectra emanating from a speaker at a fixed location, while varying the ripple bandwidth between 1...
2017: PloS One
https://www.readbyqxmd.com/read/28333624/a-fast-and-robust-beamspace-adaptive-beamformer-for-medical-ultrasound-imaging
#12
Ali Mohades Deylami, Babak Mohammadzadeh Asl
Minimum variance beamformer (MVB) increases the resolution and contrast of medical ultrasound imaging compared to non-adaptive beamformers. These advantages come at the expense of high computational complexity that prevents this adaptive beamformer to be applied in a real-time imaging system. A new beamspace based on discrete cosine transform (DCT) is proposed in which the medical ultrasound signals can be represented with less dimensions compared to the standard beamspace. This is because of symmetric beampattern of the beams in the proposed beamspace compared to the asymmetric ones in the standard beamspace...
March 21, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28333498/workplace-status-the-development-and-validation-of-a-scale
#13
Emilija Djurdjevic, Adam C Stoverink, Anthony C Klotz, Joel Koopman, Serge P da Motta Veiga, Kai Chi Yam, Jack Ting-Ju Chiang
Research suggests that employee status, and various status proxies, relate to a number of meaningful outcomes in the workplace. The advancement of the study of status in organizational settings has, however, been stymied by the lack of a validated workplace status measure. The purpose of this manuscript, therefore, is to develop and validate a measure of workplace status based on a theoretically grounded definition of status in organizations. Subject-matter experts were used to examine the content validity of the measure...
March 23, 2017: Journal of Applied Psychology
https://www.readbyqxmd.com/read/28333485/visual-acuity-in-the-striped-skunk-mephitis-mephitis
#14
Zoe Johnson-Ulrich, Eric Hoffmaster, Audrey Robeson, Jennifer Vonk
The visual acuity of striped skunks (Mephitis mephitis) was tested using a 2 alternative forced-choice task with square wave gratings. Skunks were reinforced with food items for touching a ball in front of a striped stimulus when paired with a ball in front of a solid gray stimulus. Skunks demonstrated a maximum visual acuity of 0.42 cycles per degree when tested with bright outdoor illumination. This poor visual acuity may be due to their nocturnal lifestyle, lack of predation, and is consistent with their preferential use of smell and sound during foraging...
March 23, 2017: Journal of Comparative Psychology
https://www.readbyqxmd.com/read/28333399/evaluation-of-surface-roughness-characteristics-using-atomic-force-microscopy-and-inspection-of-microhardness-following-resin-infiltration-with-icon-%C3%A2
#15
Elif Beril Gurdogan, Didem Ozdemir-Ozenen, Nuket Sandalli
OBJECTIVE: The aim of this study was to evaluate the surface roughness via atomic force microscopy (AFM) as well as to evaluate the microhardness values of Icon(®) in comparison with sound and demineralized enamel in a large subject group. MATERIALS AND METHODS: Enamel samples were prepared from sound bovine incisors and randomly allocated into either AFM (n = 60) or microhardness (n = 60) groups. The AFM group was divided into control (n = 30) and Icon(®) (n = 30) subgroups...
March 23, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28333389/the-cochlea-of-the-enigmatic-pygmy-right-whale-caperea-marginata-informs-mysticete-phylogeny
#16
Travis Park, Felix G Marx, Erich M G Fitzgerald, Alistair R Evans
The pygmy right whale, Caperea marginata, is the least understood extant baleen whale (Cetacea, Mysticeti). Knowledge on its basic anatomy, ecology, and fossil record is limited, even though its singular position outside both balaenids (right whales) and balaenopteroids (rorquals + grey whales) gives Caperea a pivotal role in mysticete evolution. Recent investigations of the cetacean cochlea have provided new insights into sensory capabilities and phylogeny. Here, we extend this advance to Caperea by describing, for the first time, the inner ear of this enigmatic species...
March 23, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28332815/detecting-subtle-vibrations-using-graphene-based-cellular-elastomers
#17
M Bulut Coskun, Ling Qiu, Md Shamsul Arefin, Adrian Neild, Mehmet Yuce, Dan Li, Tuncay Alan
Ultralight graphene elastomer-based flexible sensors are developed to detect subtle vibrations within a broad bandwidth frequency. The same device can be employed as an accelerometer, tested within the experimental bandwidth of 20-300 Hz as well as a microphone, monitoring sound pressures from 300 to 20,000 Hz. The sensing element does not contain any metal parts, making them undetectable by external sources and can provide a sensitivity of 2.6 mV/g/V, which is higher than those of rigid Si-based piezoresistive micro electro mechanical systems (MEMS) systems...
March 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28332172/quantitative-ultrasound-and-dxa-measurements-in-aromatase-inhibitor-treated-breast-cancer-women-receiving-denosumab
#18
A Catalano, A Gaudio, N Morabito, G Basile, R M Agostino, A Xourafa, M Atteritano, E Morini, G Natale, A Lasco
PURPOSE: Denosumab has been proven to reduce fracture risk in breast cancer (BC) women under aromatase inhibitors (AIs). Quantitative ultrasound (QUS) provides information on the structure and elastic properties of bone. Our aim was to assess bone health by phalangeal QUS and by dual-energy X-ray absorptiometry (DXA), and to evaluate bone turnover in AIs-treated BC women receiving denosumab. METHODS: 35 Postmenopausal BC women on AIs were recruited (mean age 61...
March 22, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28332168/pulp-bleeding-color-is-an-indicator-of-clinical-and-histohematologic-status-of-primary-teeth
#19
Naser Asl Aaminabadi, Marziyeh Parto, Parya Emamverdizadeh, Zahra Jamali, Sajjad Shirazi
OBJECTIVES: This study was carried out to investigate whether the changes in hematologic characteristic and color of pulpal bleeding is associated with clinical and histologic status of the pulp in primary teeth. MATERIALS AND METHODS: A total of 211 primary molars in 103 patients, 3-6 years old, were treated. One hundred eight teeth had pulpectomy, 57 teeth had pulpotomy after pulp exposure during caries excavation, and 46 teeth had pulpotomy after accidental pulp exposure in sound dentin...
March 23, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28332111/practical-issues-in-evidence-based-use-of-performance-supplements-supplement-interactions-repeated-use-and-individual-responses
#20
REVIEW
Louise M Burke
Current sports nutrition guidelines recommend that athletes only take supplements following an evidence-based analysis of their value in supporting training outcomes or competition performance in their specific event. While there is sound evidence to support the use of a few performance supplements under specific scenarios (creatine, beta-alanine, bicarbonate, caffeine, nitrate/beetroot juice and, perhaps, phosphate), there is a lack of information around several issues needed to guide the practical use of these products in competitive sport...
March 22, 2017: Sports Medicine
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