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PubMed | Creare and University of Texas at Dallas
Type: | Journal: Hearing research | Year: 2016

Speech communication often takes place in noisy environments; this is an urgent issue for military personnel who must communicate in high-noise environments. The effects of noise on speech recognition vary significantly according to the sources of noise, the number and types of talkers, and the listeners hearing ability. In this review, speech communication is first described as it relates to current standards of hearing assessment for military and civilian populations. The next section categorizes types of noise (also called maskers) according to their temporal characteristics (steady or fluctuating) and perceptive effects (energetic or informational masking). Next, speech recognition difficulties experienced by listeners with hearing loss and by older listeners are summarized, and questions on the possible causes of speech-in-noise difficulty are discussed, including recent suggestions of hidden hearing loss. The final section describes tests used by military and civilian researchers, audiologists, and hearing technicians to assess performance of an individual in recognizing speech in background noise, as well as metrics that predict performance based on a listener and background noise profile. This article provides readers with an overview of the challenges associated with speech communication in noisy backgrounds, as well as its assessment and potential impact on functional performance, and provides guidance for important new research directions relevant not only to military personnel, but also to employees who work in high noise environments.


Swan J.G.,One Medical Center Dr | Wilbur J.C.,Creare | Moodie K.L.,One Medical Center Dr | Kane S.A.,One Medical Center Dr | And 6 more authors.
Journal of Applied Physiology | Year: 2014

Using dual-frequency ultrasound (DFU), microbubbles (<10 (xm diameter) have been detected in tissue following decompression. It is not known if these micro-bubbles are the precursors for B-mode ultrasound-detectable venous gas emboli (bmdVGE). The purpose of this study was to determine if microbubbles could be detected intravascularly postdecompression and to investigate the temporal relationship between microbubbles and larger bmdVGE. Anesthetized swine (n = 15) were exposed to 4.0-4.5 ATA for 2 h, followed by decompression to 0.98 ATA. Microbubble presence and VGE grade were measured using DFU and B-mode ultrasound, respectively, before and for 1 h postdecompression, approximately every 4-5 min. Microbubbles appeared in the bloodstream postdecompression, both in the presence and absence of bmdVGE. In swine without bmdVGE, microbubbles remained elevated for the entire 60-min postdecompression period. In swine with bmdVGE, microbubble signals were detected initially but then returned to baseline. Microbubbles were not detected with the sham dive. Mean bmdVGE grade increased over the length of the postdecompression data collection period. Comparison of the two response curves revealed significant differences at 5 and 10 min postdecompression, indicating that microbubbles preceded bmdVGE. These findings indicate that decompression-induced microbubbles can 1) be detected intravascularly at multiple sites, 2) appear in the presence and absence of bmdVGE, and 3) occur before bmdVGE. This supports the hypothesis that microbubbles precede larger VGE bubbles. Micro-bubble presence may be an early marker of decompression stress. Since DFU is a low-power ultrasonic method, it may be useful for operational diving applications. Copyright © 2014 the American Physiological Society.


Grant
Agency: Department of Defense | Branch: Navy | Program: SBIR | Phase: Phase I | Award Amount: 79.86K | Year: 2014

Increasing use of high power density electronics systems in military vehicles and buildings will significantly increase thermal loads of their Environmental Control Systems (ECS). Advanced thermal management technology is needed for these ECSs. We propose to develop a highly effective, low-cost heat exchanger that will enhance thermal effectiveness of evaporators in vapor compression systems. The heat exchanger has design features to effectively suppress flow instability in the evaporator under challenging operating conditions, thus significantly enhancing its thermal effectiveness and the ECS power efficiency. The compact microchannel heat exchanger will also significantly reduce the size and mass of the evaporator. The fabrication of the heat exchanger is built on well-established manufacturing techniques for modern large-scale heat exchangers. In Phase I, we will prove the feasibility of the microchannel heat exchanger through laboratory testing and design the Phase II laboratory-scale microchannel heat exchanger. In Phase II, we will design, build, and demonstrate a highly effective microchannel heat exchanger for an ECS.


Grant
Agency: Department of Defense | Branch: Defense Health Program | Program: SBIR | Phase: Phase I | Award Amount: 149.99K | Year: 2014

Hearing loss and tinnitus remain the most common service-connected disabilities, and may be caused by excessive noise exposure, as well as blast and impulse noise. Soldiers who experience tinnitus or mild-to-moderate hearing loss tend to have difficulty understanding speech in noise. While peripheral hearing loss can be addressed with amplification through a hearing aid, significant rehabilitation is still required to address loss of hearing processing ability. Creare and its partners propose to design, implement, and test a mobile application (app) for auditory training and tinnitus management specifically targeting the military user. The app gives the users the option to manage their tinnitus and perform hearing in noise training tasks. The tasks are based on hearing critical tasks common to many military occupational specialties and use phrases and functional noise recorded during military training. Creare is uniquely positioned to develop this technology thanks to its extensive experience in developing mobile technology for hearing and neurocognitive assessment, as well as its active involvement in the development of functional hearing tests to be used as part of new Army Hearing Standards for Return-to-Duty decisions.


Grant
Agency: Department of Defense | Branch: Navy | Program: SBIR | Phase: Phase I | Award Amount: 79.87K | Year: 2014

Navy ships often develop small, pinhole leaks in stainless steel fuel piping while at sea. Due to the long duration between in-dock maintenance cycles (typically one and a half to three years), temporary patches are often used to repair the leaks. The current composite patches that represent the state of the art are expensive, difficult and potentially hazardous to install, are not durable, and may not be compatible with JP-5 fuel or thin-walled, stainless steel piping. Our novel solution to repair small leaks in fuel system piping is our Compact Repair System (CRS). We have adapted a conventional welding process currently used for large-scale manufacturing and miniaturized the technology to facilitate the repair. Our CRS is ideally suited to portable systems for shipboard repair applications. During the Phase I project, we will assemble the CRS, complete repair testing on relevant materials, and design the prototype for shipboard repair. During Phase II, we will complete the system design, fabrication, and testing and transition the technology to the Navy fleet.


Grant
Agency: Department of Defense | Branch: Navy | Program: SBIR | Phase: Phase II | Award Amount: 730.96K | Year: 2014

Legacy copper-based power distribution and degaussing cables will not be able to meet the future requirements of Navy ships and submarines. While cable systems employing high-temperature superconductors (HTS) have the potential to meet this need, further development work is required to improve the performance and increase the technology readiness level of key system components. The proposed work focuses on the cryostats used to encase the cryogenic HTS cables used in a shipboard HTS degaussing system. Currently, HTS cryostats are made in the factory at predetermined lengths and cannot be modified during installation. This can be problematic during shipyard installation because it is difficult to precisely determine the required length, and cryostats often need to be rerouted relative to initial installation plans. Creare developed a modularized HTS cryostat that will provide the much needed flexibility to tailor the cryostat length and apply end connections at the time of installation. In Phase I we completed a proof-of-concept demonstration of our Field Serviceable Cryostat (FSC) approach for superconducting degaussing and power cables. In Phase II we will fabricate and test a full-scale prototype FSC and deliver it to the Navy.


Grant
Agency: Department of Defense | Branch: Navy | Program: SBIR | Phase: Phase II | Award Amount: 748.02K | Year: 2014

Safe efficient operations on the flight line or on the deck of an aircraft carrier require effective communications between members of the crew and between members of the crew and the aircraft pilot. Maintainers working on the flight deck or flight line are often subject to extremely loud noise fields (110 to 140 dBA), which makes natural voice communications challenging or impossible. Missed communication and miscommunication are a constant risk, either of which could imperil operational tempo or crew safety. A new solution is needed to enable high-reliability communications between personnel on the flight deck and flight line. Creare proposes an ultrasonic communications system to enable voice and data communications for maintainers on the flight deck and flight line. In Phase I, we developed the core technology and overall system architecture. In Phase II, we will design, fabricate, and test the system and deliver prototype units to the Navy.


Grant
Agency: Department of Defense | Branch: Navy | Program: STTR | Phase: Phase I | Award Amount: 149.80K | Year: 2014

Acoustic imaging is the preferred modality for mine detection. However, acoustic images are noisy and difficult to interpret due to acoustic clutter, the interaction of sound with the seafloor, and potential penetration of sound into the sediment with subsequent reflection. Creare proposes to develop a Seabed Imaging System (SIS) capable of providing detailed information on both the topography and composition of the seafloor. The SIS is intended to be mounted on an autonomous underwater vehicle (AUV) to provide data that can be used to supplement and constrain acoustic performance models. Data from the SIS will assist in estimating sonar penetration depth and the magnitude of acoustic image degradation due to clutter. The Creare SIS balances the need for high spatial resolution with low power consumption and fully automated data processing. The small footprint of the system facilitates mounting on existing AUV platforms.


News Article | February 24, 2017
Site: www.businesswire.com

BERLINO--(BUSINESS WIRE)--Più di mille clienti in tutto il mondo ora comprendono e pianificano meglio i propri processi aziendali grazie a Signavio. Le aziende devono sapere come implementare con successo i processi aziendali e reagire in modo coerente a nuove sfide: ecco perché Signavio ha triplicato il proprio portafoglio clienti negli ultimi tre anni. “ La richiesta dei nostri prodotti è cresciuta rapidamente in molti paesi. Creare rapporti stretti con i clienti è molto importante per noi, quindi avere una forte presenza in queste regioni è una priorità assoluta.”


News Article | February 28, 2017
Site: www.prnewswire.co.uk

BARCELLONA, Spagna, 28 febbraio 2017 /PRNewswire/ -- ZTE Corporation (0763.HK / 000063.SZ), affermato provider internazionale di soluzioni di telecomunicazioni e di tecnologia per consumatori e imprese nel settore dell'Internet mobile ha presentato oggi, durante il Mobile World Congress di Barcellona, la prima soluzione Flexhaul 5G IP+Optical del settore, una soluzione con fronthaul e backhaul integrati, basata sulla tecnologia IP (Internet Protocol)+Optical. È risaputo che le reti 5G forniscono agli utenti un'esperienza senza precedenti in termini di ampiezza di banda, latenza e numero di connessioni. Rispetto al solo scenario 4G, il 5G supporta svariati scenari, tra cui comunicazioni di tipo eMBB (Enhanced Mobile Broadband), mMTC (Massive Machine Type Communications) e uRLLC (Ultra-Reliable and Low Latency Communications), dove gli indicatori chiave dei vari scenari differiscono significativamente. Pertanto, le reti tradizionali vedono requisiti che includono la riconfigurazione di strutture, l'upgrade di apparati e il miglioramento di performance. Creare un ambiente bearer network efficace ed economico per rispondere ai requisiti di ampiezza di banda superlarga, latenza minima e cloudification delle reti fondamentali, nonché delle reti RAN (radio access network) nell'era 5G, è divenuta la sfida degli operatori globali. La soluzione Flexhaul 5G di ZTE combina architetture Flex Ethernet e IP+Optical e offre funzioni di pipeline di trasporto flessibili e superlarghe per i servizi fronthaul e backhaul 5G. La soluzione Flexhaul 5G implementa l'applicazione end-to-end (E2E) della sinergia IP+Optical e offre funzioni di pianificazione, programmazione, gestione e manutenzione unificate tramite i controller SDN. I dispositivi integrati IP+Optical vengono impiegati nel mass access layer per ridurre i costi della costruzione di reti e risparmiare sull'ingombro delle apparecchiature. Il trasporto su ampiezza di banda superlarga si ottiene grazie alla connessione con lunghezza d'onda multipla su nodi adiacenti. Inoltre, la funzione FlexE permette di isolare sottocanali di svariati servizi per fornire un ottimale supporto del piano di inoltro per lo slicing di bearer network 5G. ZXCTN 6180H, apparecchiatura pre-commerciale di trasporto 5G presentata altresì al MWC, è alta solo 3RU e supporta fino a 1T di capacità di networking di un anello di connessione. Oltre alla funzione della pipeline di trasporto superlarga, la soluzione Flexhaul 5G dispone di funzionalità di latenza di trasporto flessibili. Il budget di latenza assegnato alla rete fronthaul dalla rete C-RAN 5G (Cloud Radio-Access Network) è inferiore a 100us. Nel piano di inoltro, la soluzione 5G Flexhaul supporta le modalità di inoltro rapido e ordinario, selezionabili in base al tipo di servizio. La modalità di inoltro rapido è per i servizi sensibili al tempo. La tecnologia TSN (Time Sensitive Network) serve a ridurre l'alternanza di latenza tra i nodi di servizio inferiore e superiore, che può andare da 30 a più microsecondi. Il nodo intermedio usa la tecnologia bypass ottico per ottenere una latenza di inoltro inferiore a 1 microsecondo. Ciò risponde ai requisiti di scarsa latenza del 5G e offre una potente garanzia per i nuovi servizi e per le nuove architetture di rete. La funzione di cloudification inclusa nel 5G renderà le connessioni ubique e flessibili. La soluzione Flexhaul 5G, basata su ingegneria del traffico SDN, può creare connessioni ubique con efficacia e ottimizzare dinamicamente il traffico di rete sulla base delle informazioni raccolte dal sistema di monitoraggio del traffico, per reagire ai flussi di marea della rete e intensificare l'utilizzo delle risorse. "ZTE porta avanti l'innovazione e offre soluzioni e prodotti competitivi per gli operatori globali. La tecnologia 5G si appresta a scatenare una nuova rivoluzione nella rete, a cui ZTE risponde attivamente, promuovendo l'applicazione e il collaudo delle tecnologie di trasporto 5G. ZTE ha eseguito ricerche premature confrontandosi con una serie di operatori rispetto alla cooperazione per la tecnologia 5G, fronthaul e backhaul. La soluzione Flexhaul 5G aiuterà ampiamente gli operatori globali a creare una rete di trasporto 5G a prova di futuro, flessibile, efficace dal punto di vista dei costi e integrata" ha concluso Mr. Zhao Fuchuan, Chief Engineer di ZTE 5G Transport Solution. ZTE è un fornitore di sistemi avanzati di telecomunicazioni, di dispositivi mobili e di soluzioni tecnologiche professionali per consumatori, carrier, imprese e settore pubblico. Come parte della strategia nel settore dell'ICT mobile, ZTE è impegnata nell'offerta ai clienti di innovazioni integrate e complete in grado di portare eccellenza e valore nel quadro della convergenza tra i settori delle telecomunicazioni e delle tecnologie informatiche. Quotata alle borse di Hong Kong (codice azionario H: 0763.HK) e di Shenzhen (codice azionario A: 000063.SZ), la società fornisce prodotti e servizi a più di 500 operatori in oltre 160 paesi. ZTE investe il 10% del fatturato annuo in attività di ricerca e sviluppo e svolge ruoli guida in varie istituzioni internazionali che puntano a definire nuovi standard nelle telecomunicazioni. ZTE è fortemente impegnata nelle iniziative di responsabilità sociale d'impresa e fa parte del Global Compact delle Nazioni Unite. Per ulteriori informazioni visitare il sito www.zte.com.cn

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