keyword
https://read.qxmd.com/read/38534875/a-highly-sensitive-deep-sea-hydrodynamic-pressure-sensor-inspired-by-fish-lateral-line
#1
JOURNAL ARTICLE
Xiaohe Hu, Zhiqiang Ma, Zheng Gong, Fuqun Zhao, Sheng Guo, Deyuan Zhang, Yonggang Jiang
Hydrodynamic pressure sensors offer an auxiliary approach for ocean exploration by unmanned underwater vehicles (UUVs). However, existing hydrodynamic pressure sensors often lack the ability to monitor subtle hydrodynamic stimuli in deep-sea environments. In this study, we present the development of a deep-sea hydrodynamic pressure sensor (DSHPS) capable of operating over a wide range of water depths while maintaining exceptional hydrodynamic sensing performance. The DSHPS device was systematically optimized by considering factors such as piezoelectric polyvinylidene fluoride-trifluoroethylene/barium titanate [P(VDF-TrFE)/BTO] nanofibers, electrode configurations, sensing element dimensions, integrated circuits, and packaging strategies...
March 20, 2024: Biomimetics
https://read.qxmd.com/read/38532540/exploring-trauma-patterns-and-contributing-factors-with-slim-straight-electrode-array-after-cochlear-implantation
#2
JOURNAL ARTICLE
Renato Torres, Hannah Daoudi, Wenxi Gu, Eugénie Breil, Evelyne Ferrary, Olivier Sterkers, Yann Nguyen, Isabelle Mosnier
OBJECTIVE: To assess trauma patterns associated with the insertion of lateral wall electrode arrays. The study focused on 3 categories-scala tympani (ST), intermediate, and scala vestibuli (SV)-to identify traumatic patterns and contributing factors. STUDY DESIGN: Retrospective study. SETTING: Data from 106 cochlear implant recipients at a tertiary otologic center. METHODS: Demographic and surgical data were collected from recipients who underwent cochlear implantation manually and with RobOtol®...
March 26, 2024: Otolaryngology—Head and Neck Surgery
https://read.qxmd.com/read/38530648/morphology-and-selectivity-of-hydrated-alkali-metal-ions-as-depth-of-discharge-in-the-1t-mos-2-electrode-with-aqueous-electrolytes
#3
JOURNAL ARTICLE
Shenrui Liao, Wenhui Zhao, Xiao Gu
Aqueous ion batteries have great commercial potential in green power and energy storage due to their green nature, safety and high ionic conductivities. Different from organic electrolytes, alkali ions (Li+ , Na+ , and K+ ) inevitably bring water molecules into the electrodes during the charging/discharging process due to the hydration of ions with water molecules. The selectivity of alkali ions and the mechanism of how water molecules are involved in the ion extraction/insertion process in the electrodes have not been clarified...
March 26, 2024: Physical Chemistry Chemical Physics: PCCP
https://read.qxmd.com/read/38520800/multiscale-neuro-inspired-models-for-interpretation-of-eeg-signals-in-patients-with-epilepsy
#4
JOURNAL ARTICLE
Fabrice Wendling, Elif Koksal-Ersoz, Mariam Al-Harrach, Maxime Yochum, Isabelle Merlet, Giulio Ruffini, Fabrice Bartolomei, Pascal Benquet
OBJECTIVE: The aim is to gain insight into the pathophysiological mechanisms underlying interictal epileptiform discharges observed in electroencephalographic (EEG) and stereo-EEG (SEEG, depth electrodes) recordings performed during pre-surgical evaluation of patients with drug-resistant epilepsy. METHODS: We developed novel neuro-inspired computational models of the human cerebral cortex at three different levels of description: i) microscale (detailed neuron models), ii) mesoscale (neuronal mass models) and iii) macroscale (whole brain models)...
March 16, 2024: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://read.qxmd.com/read/38516541/effect-of-cochlear-implant-electrode-insertion-depth-on-speech-perception-outcomes-a-systematic-review
#5
JOURNAL ARTICLE
Tabita M Breitsprecher, Wolf-Dieter Baumgartner, Kevin Brown, Stefan Dazert, Una Doyle, Anandhan Dhanasingh, Wilma Großmann, Rudolf Hagen, Paul Van de Heyning, Robert Mlynski, Marcus Neudert, Gunesh Rajan, Kristen Rak, Vincent Van Rompaey, Joachim Schmutzhard, Stefan Volkenstein, Christiane Völter, Wilhelm Wimmer, Mario Zernotti, Nora M Weiss
OBJECTIVE: The suitable electrode array choice is broadly discussed in cochlear implantation surgery. Whether to use a shorter electrode length under the aim of structure preservation versus choosing a longer array to achieve a greater cochlear coverage is a matter of debate. The aim of this review is to identify the impact of the insertion depth of a cochlear implant (CI) electrode array on CI users' speech perception outcomes. DATABASES REVIEWED: PubMed was searched for English-language articles that were published in a peer-reviewed journal from 1997 to 2022...
December 2023: Otol Neurotol Open
https://read.qxmd.com/read/38516068/a-covalent-organic-framework-as-a-dual-active-center-cathode-for-a-high-performance-aqueous-zinc-ion-battery
#6
JOURNAL ARTICLE
Hongbao Li, Mengge Cao, Zhenli Fu, Quanwei Ma, Longhai Zhang, Rui Wang, Fei Liang, Tengfei Zhou, Chaofeng Zhang
Organic electrode materials have shown significant potential for aqueous Zn ion batteries (AZIBs) due to their flexible structure designability and cost advantage. However, sluggish ionic diffusion, high solubility, and low capacities limit their practical application. Here, we designed a covalent organic framework (TA-PTO-COF) generated by covalently bonding tris(4-formylbiphenyl)amine (TA) and 2,7-diaminopyrene-4,5,9,10-tetraone (PTO-NH2 ). The highly conjugated skeleton inside enhances its electron delocalization and intermolecular interaction, leading to high electronic conductivity and limited solubility...
March 20, 2024: Chemical Science
https://read.qxmd.com/read/38514846/effect-of-pre-intercalation-on-li-ion-diffusion-mapped-by-topochemical-single-crystal-transformation-and-operando-investigation
#7
JOURNAL ARTICLE
Yuting Luo, Joseph V Handy, Tisita Das, John D Ponis, Ryan Albers, Yu-Hsiang Chiang, Matt Pharr, Brian J Schultz, Leonardo Gobbato, Dean C Brown, Sudip Chakraborty, Sarbajit Banerjee
Limitations in electrochemical performance as well as supply chain challenges have rendered positive electrode materials a critical bottleneck for Li-ion batteries. State-of-the-art Li-ion batteries fall short of accessing theoretical capacities. As such, there is intense interest in the design of strategies that enable the more effective utilization of active intercalation materials. Pre-intercalation with alkali-metal ions has attracted interest as a means of accessing higher reversible capacity and improved rate performance...
March 21, 2024: Nature Materials
https://read.qxmd.com/read/38513155/multiphase-reset-induced-reliable-dual-mode-resistance-switching-of-the-ta-hfo-2-ruo-2-memristor
#8
JOURNAL ARTICLE
Dong Hoon Shin, Hyungjun Park, Néstor Ghenzi, Yeong Rok Kim, Sunwoo Cheong, Sung Keun Shim, Seongpil Yim, Tae Won Park, Haewon Song, Jung Kyu Lee, Byeong Su Kim, Taegyun Park, Cheol Seong Hwang
Higher functionality should be achieved within the device-level switching characteristics to secure the operational possibility of mixed-signal data processing within a memristive crossbar array. This work investigated electroforming-free Ta/HfO2 /RuO2 resistive switching devices for digital- and analog-type applications through various structural and electrical analyses. The multiphase reset behavior, induced by the conducting filament modulation and oxygen vacancy generation (annihilation) in the HfO2 layer by interacting with the Ta (RuO2 ) electrode, was utilized for the switching mode change...
March 21, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38511543/anchoring-ultrafine-%C3%AE-mo-2-c-clusters-inside-porous-co-nc-using-mofs-for-electric-powered-coproduction-of-valuable-chemicals
#9
JOURNAL ARTICLE
Yu-Zhen Chen, Yi-Wen Fan, Yang Wang, Zhibo Li
Electroredox of organics provides a promising and green approach to producing value-added chemicals. However, it remains a grand challenge to achieve high selectivity of desired products simultaneously at two electrodes, especially for non-isoelectronic transfer reactions. Here a porous heterostructure of Mo2 C@Co-NC is successfully fabricated, where subnanometre β-Mo2 C clusters (<1 nm, ≈10 wt%) are confined inside porous Co, N-doped carbon using metalorganic frameworks. It is found that Co species not only promote the formation of β-Mo2 C but also can prevent it from oxidation by constructing the heterojunctions...
March 21, 2024: Small
https://read.qxmd.com/read/38509805/is-the-position-of-the-basal-most-electrode-depending-on-electrode-array-design-and-influencing-postoperative-speech-perception-a-retrospective-analysis-of-495-ears
#10
JOURNAL ARTICLE
Rainer Linus Beck, Antje Aschendorff, Susan Arndt, Tanja Hildenbrand, Manuel Christoph Ketterer
OBJECTIVE: The objective of this study is to examine the influence of electrode array design on the position of the basal-most electrode in cochlear implant (CI) surgery and therefore the stimulability of the basal cochlea. Specifically, we evaluated the angular insertion depth of the basal-most electrode in perimodiolar and straight electrode arrays in relation to postoperative speech perception. MATERIALS AND METHODS: We conducted a retrospective analysis of 495 patients between 2013 and 2018 using the Cochlear™ Contour Advance® (CA), Cochlear™ Slim Straight® (SSA), or Cochlear™ Slim Modiolar® (SMA) electrode arrays, as well as the MED-EL Flex24 (F24), MED-EL Flex28 (F28), and MED-EL FlexSoft (F31...
March 21, 2024: Otology & Neurotology
https://read.qxmd.com/read/38508293/temporal-interference-stimulation-targets-deep-primate-brain
#11
JOURNAL ARTICLE
Ruobing Liu, Guanyu Zhu, Zhengping Wu, Yifei Gan, Jianguo Zhang, Jiali Liu, Liang Wang
Temporal interference (TI) stimulation, a novel non-invasive stimulation strategy, has recently been shown to modulate neural activity in deep brain regions of living mice. Yet, it is uncertain if this method is applicable to larger brains and whether the electric field produced under traditional safety currents can penetrate deep regions as observed in mice. Despite recent model-based simulation studies offering positive evidence at both macro- and micro-scale levels, the absence of electrophysiological data from actual brains hinders comprehensive understanding and potential application of TI...
March 18, 2024: NeuroImage
https://read.qxmd.com/read/38491865/creation-of-a-prototype-cochlear-training-model
#12
JOURNAL ARTICLE
Ishwor Gautam, Avi Shaw, Dhiren Brickman, Ajay Mahajan, Anita Jeyakumar
OBJECTIVE: Creation of a novel 3D-printed physical cochlear model that demonstrated the feasibility of creating the model, and impact of a Graphical User Interface (GUI) system on training insertion metrics. STUDY DESIGN: Feasibility study with a pilot prospective data collection. SETTING: Tertiary academic center. METHODS: The study was IRB exempt. Five resident trainees (PGY1-PGY5) practiced electrode insertions in cadaveric temporal bones before using the simulator...
March 16, 2024: Annals of Otology, Rhinology, and Laryngology
https://read.qxmd.com/read/38479363/development-of-an-algorithm-for-correct-placement-of-the-basal-electrode-contact-in-the-context-of-anatomy-based-cochlear-implantation-a-proof-of-concept
#13
JOURNAL ARTICLE
Bjoern Spahn, Johannes Voelker, Franz-Tassilo Müller-Graff, Jonas Engert, Daniel Bauer, Anja Kurz, Rudolf Hagen, Tilmann Neun, Simon Zabler, Kristen Rak
BACKGROUND: Correct individual tonotopic frequency stimulation of the cochlea plays an important role in the further development of anatomy based cochlear implantation. In this context frequency specific fitting of the basal electrode contact with a normal insertion depth can be difficult since it is often placed in a frequency range higher than 10 kHz and current audio processors only stimulate for frequencies up to 8.5 kHz due to microphone characteristics. This results in a mismatch of the high frequencies...
March 13, 2024: Audiology & Neuro-otology
https://read.qxmd.com/read/38468608/impact-of-flexible-circuit-bonding-and-system-integration-on-energy-resolution-of-cross-strip-czt-detectors
#14
JOURNAL ARTICLE
Emily Enlow, Milad Diba, James Clayton, Brian Harris, Shiva Abbaszadeh
Cadmium zinc telluride (CZT) detectors enable high spatial resolution and high detection efficiency and are utilized for many gamma-ray and X-ray spectroscopy applications. In this article, we describe a stable bonding process and report on the characterization of cross-strip CZT detectors before and after bonding to flexible circuit. The bonding process utilizes gold stud bonding and polymer epoxy technique to bond the flexible circuits to two CZT crystals and form a detector module in an anode-cathode-cathode-anode (ACCA) configuration...
July 2023: IEEE Transactions on Radiation and Plasma Medical Sciences
https://read.qxmd.com/read/38467433/human-prosocial-preferences-are-related-to-slow-wave-activity-in-sleep
#15
JOURNAL ARTICLE
Mirjam Studler, Lorena R R Gianotti, Janek Lobmaier, Angelina Maric, Daria Knoch
Prosocial behavior is crucial for the smooth functioning of society. Yet, individuals differ vastly in the propensity to behave prosocially. Here we try to explain these individual differences under normal sleep conditions without any experimental modulation of sleep. Using a portable high-density EEG we measured sleep data in 54 healthy adults (28 females) during a normal night's sleep at participants' homes. To capture prosocial preferences, participants played an incentivised public goods game in which they faced real monetary consequences...
March 11, 2024: Journal of Neuroscience
https://read.qxmd.com/read/38466813/uncovering-structural-evolution-during-the-dealloying-process-in-pt-based-oxygen-reduction-catalyst
#16
JOURNAL ARTICLE
Huijuan Zhang, Minyuan Tan, Longfei Hu, Renjie Gui, Xiaokang Liu, Xue Zhang, Zhiguo Sun, Linlin Cao, Tao Yao
The comprehensive understanding toward the dealloying process is crucial for designing alloy catalysts employed in the oxygen reduction reaction (ORR). However, the specific leaching procedure and subsequent reconstruction of the dealloyed catalyst still remain unclear. Herein, we employ in situ X-ray absorption fine structure spectroscopy to monitor the dealloying process of a two-dimensional PtTe ordered alloy, known for its enhanced ORR activity. Our findings reveal the unsynchronous evolutions of Pt and Te sites, wherein the Pt component undergoes a structural transformation prior to the complete leaching of Te, leading to the formation of a defect-rich Pt catalyst...
March 11, 2024: Journal of Physical Chemistry Letters
https://read.qxmd.com/read/38465967/an-nir-iib-emissive-transmembrane-voltage-nano-indicator-for-the-optical-monitoring-of-electrophysiological-activities-in-vivo
#17
JOURNAL ARTICLE
Zhenyu Xing, Qian Hu, Weikan Wang, Na Kong, Rong Gao, Xiaolei Shen, Sixin Xu, Lingkai Meng, Jian-Ren Liu, Xingjun Zhu
In vivo transmembrane-voltage detection reflected the electrophysiological activities of the biological system, which is crucial for the diagnosis of neuronal disease. Traditional implanted electrodes can only monitor limited regions and induce relatively large tissue damage. Despite emerging monitoring methods based on optical imaging have access to signal recording in a larger area, the recording wavelength of less than 1000 nm seriously weakens the detection depth and resolution in vivo . Herein, a Förster resonance energy transfer (FRET)-based nano-indicator, NaYbF4 :Er@NaYF4 @Cy7...
March 11, 2024: Materials Horizons
https://read.qxmd.com/read/38457804/comparative-effectiveness-of-stereotactic-subdural-or-hybrid-intracranial-eeg-monitoring-in-epilepsy-surgery
#18
JOURNAL ARTICLE
Rohan Jha, David D Liu, Jakob V E Gerstl, Sophia Renauld, John L Kilgallon, Sarah E Blitz, Lila Medeiros, Noah L A Nawabi, Hargunbir Singh, Melissa M J Chua, Steven Tobochnik, G Rees Cosgrove, John D Rolston
OBJECTIVE: Surgical intervention can be curative or palliative for drug-resistant focal epilepsy. However, if the seizure onset zone (SOZ) cannot be adequately localized via noninvasive tests, intracranial EEG (iEEG) recordings are often carried out to develop surgical plans in appropriate candidates. Stereotactic EEG (SEEG), subdural EEG (SDE), and SDE with depth electrodes (hybrid) are major tools used for investigation, but there is no class 1 or 2 evidence comparing the effectiveness of these modalities...
March 8, 2024: Journal of Neurosurgery
https://read.qxmd.com/read/38457045/identification-of-medium-and-mechanism-related-pitfalls-towards-improved-performance-and-applicability-of-electrochemical-mercury-ii-aptasensors
#19
JOURNAL ARTICLE
Anna Szymczyk, Martyna Popiołek, Jakub Krzemiński, Marcin Olszewski, Robert Ziółkowski, Elżbieta Malinowska
The importance of understanding the mercury (II) ion interactions with thymine-rich DNA sequences is the reason for multiple comparative investigations carried out with the use of optical detection techniques directly in the depth of solution. However, the results of such investigations have limited applicability in the interpretation of the Hg2+ binding phenomenon by DNA sequences in thin, interfacial (electrode/solution), self-organized monolayers immobilized on polarizable surfaces, often used for sensing purposes in electrochemical biosensors...
March 8, 2024: Mikrochimica Acta
https://read.qxmd.com/read/38456122/implantation-accuracy-of-novel-polyimide-stereotactic-electroencephalographic-depth-electrodes-a-human-cadaveric-study
#20
JOURNAL ARTICLE
Aura Kullmann, Farida Akberali, Jaime J Van Gompel, Robert A McGovern, W Richard Marsh, Debra Kridner, Camilo A Diaz-Botia, Michael C Park
INTRODUCTION: Stereoelectroencephalography (sEEG) is a minimally invasive procedure that uses depth electrodes stereotactically implanted into brain structures to map the origin and propagation of seizures in epileptic patients. Implantation accuracy of sEEG electrodes plays a critical role in the safety and efficacy of the procedure. This study used human cadaver heads, simulating clinical practice, to evaluate (1) neurosurgeon's ability to implant a new thin-film polyimide sEEG electrode according to the instructions for use (IFU), and (2) implantation accuracy...
2024: Frontiers in medical technology
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