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https://www.readbyqxmd.com/read/29332230/a-cardioid-oscillator-with-asymmetric-time-ratio-for-establishing-cpg-models
#1
Q Fu, D H Wang, L Xu, G Yuan
Nonlinear oscillators are usually utilized by bionic scientists for establishing central pattern generator models for imitating rhythmic motions by bionic scientists. In the natural word, many rhythmic motions possess asymmetric time ratios, which means that the forward and the backward motions of an oscillating process sustain different times within one period. In order to model rhythmic motions with asymmetric time ratios, nonlinear oscillators with asymmetric forward and backward trajectories within one period should be studied...
January 13, 2018: Biological Cybernetics
https://www.readbyqxmd.com/read/29325874/perceptual-changes-with-monopolar-and-phantom-electrode-stimulation
#2
Silke Klawitter, David M Landsberger, Andreas Büchner, Waldo Nogueira
Phantom electrode (PE) stimulation is achieved by simultaneously stimulating out-of-phase from two adjacent intra-cochlear electrodes with different amplitudes. If the basal electrode stimulates with a smaller amplitude than the apical electrode of the pair, the resulting electrical field is pushed away from the basal electrode producing a lower pitch. There is great interest in using PE stimulation in a processing strategy as it can be used to provide stimulation to regions of the cochlea located more apically than the most apical contact on the electrode array...
December 28, 2017: Hearing Research
https://www.readbyqxmd.com/read/29324678/immobilization-of-enzymes-on-a-phospholipid-bionically-modified-polysulfone-gradient-pore-membrane-for-the-enhanced-performance-of-enzymatic-membrane-bioreactors
#3
Yizong Guo, Xueyan Zhu, Fei Fang, Xiao Hong, Huimin Wu, Dajing Chen, Xiaojun Huang
Enzymatic membrane bioreactors (EMBRs), with synergistic catalysis-separation performance, have increasingly been used for practical applications. Generally, the membrane properties, particularly the pore structures and interface interactions, have a significant impact on the catalytic efficiency of the EMBR. Therefore, a biomimetic interface based on a phospholipid assembled onto a polysulfone hollow-fiber membrane with perfect radial gradient pores (RGM-PSF) has been prepared in this work to construct a highly efficient and stable EMBR...
January 11, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29315837/an-artificial-flexible-visual-memory-system-based-on-an-uv-motivated-memristor
#4
Shuai Chen, Zheng Lou, Di Chen, Guozhen Shen
For the mimicry of human visual memory, a prominent challenge is how to detect and store the image information by electronic devices, which demands a multifunctional integration to sense light like eyes and to memorize image information like the brain by transforming optical signals to electrical signals that can be recognized by electronic devices. Although current image sensors can perceive simple images in real time, the image information fades away when the external image stimuli are removed. The deficiency between the state-of-the-art image sensors and visual memory system inspires the logical integration of image sensors and memory devices to realize the sensing and memory process toward light information for the bionic design of human visual memory...
January 8, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29298708/case-study-of-a-user-driven-prosthetic-arm-design-bionic-hand-versus-customized-body-powered-technology-in-a-highly-demanding-work-environment
#5
Wolf Schweitzer, Michael J Thali, David Egger
BACKGROUND: Prosthetic arm research predominantly focuses on "bionic" but not body-powered arms. However, any research orientation along user needs requires sufficiently precise workplace specifications and sufficiently hard testing. Forensic medicine is a demanding environment, also physically, also for non-disabled people, on several dimensions (e.g., distances, weights, size, temperature, time). METHODS: As unilateral below elbow amputee user, the first author is in a unique position to provide direct comparison of a "bionic" myoelectric iLimb Revolution (Touch Bionics) and a customized body-powered arm which contains a number of new developments initiated or developed by the user: (1) quick lock steel wrist unit; (2) cable mount modification; (3) cast shape modeled shoulder anchor; (4) suspension with a soft double layer liner (Ohio Willowwood) and tube gauze (Molnlycke) combination...
January 3, 2018: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29298304/the-vienna-psychosocial-assessment-procedure-for-bionic-reconstruction-in-patients-with-global-brachial-plexus-injuries
#6
Laura Antonia Hruby, Anna Pittermann, Agnes Sturma, Oskar Christian Aszmann
BACKGROUND: Global brachial plexopathies cause major sensory and motor deficits in the affected arm and hand. Many patients report of psychosocial consequences including chronic pain, decreased self-sufficiency, and poor body image. Bionic reconstruction, which includes the amputation and prosthetic replacement of the functionless limb, has been shown to restore hand function in patients where classic reconstructions have failed. Patient selection and psychological evaluation before such a life-changing procedure are crucial for optimal functional outcomes...
2018: PloS One
https://www.readbyqxmd.com/read/29226490/a-water-processable-and-bioactive-multivalent-graphene-nanoink-for-highly-flexible-bioelectronic-films-and-nanofibers
#7
Chong Cheng, Jianguang Zhang, Shuang Li, Yi Xia, Chuanxiong Nie, Zhenqiang Shi, Jose Luis Cuellar-Camacho, Nan Ma, Rainer Haag
The capabilities of conductive nanomaterials to be produced in liquid form with well-defined chemical, physical, and biological properties are highly important for the construction of next-generation flexible bioelectronic devices. Although functional graphene nanomaterials can serve as attractive liquid nanoink platforms for the fabrication of bioelectronics, scalable synthesis of graphene nanoink with an integration of high colloidal stability, water processability, electrochemical activity, and especially bioactivity remains a major challenge...
December 11, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29224718/bionic-manufacturing-towards-cyborg-cells-and-sentient-microbots
#8
Sarvesh Kumar Srivastava, Vikramaditya G Yadav
Bio-inspired engineering applies biological design principles towards developing engineering solutions but is not practical as a manufacturing paradigm. We advocate 'bionic manufacturing', a synergistic fusion of biotic and abiotic components, to transition away from bio-inspiration toward bio-augmentation to address current limitations in bio-inspired manufacturing.
December 7, 2017: Trends in Biotechnology
https://www.readbyqxmd.com/read/29219858/the-precision-of-ecap-thresholds-derived-from-amplitude-growth-functions
#9
Jan Dirk Biesheuvel, Jeroen J Briaire, Johan H M Frijns
OBJECTIVE: An amplitude growth function (AGF) shows the amplitude of an electrically evoked compound action potential (eCAP) as a function of the stimulation current. AGFs can be used to derive the eCAP threshold, which represents the minimum amount of current needed to elicit a measurable eCAP. eCAP thresholds have been widely used clinically to, for example, assist with sound processor programming. However, no eCAP precision has been included to date. The aim of this study was to investigate the precision of eCAP thresholds and determine whether they are precise enough for clinical use...
December 6, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/29218775/comparative-proteomic-analysis-of-silver-nanoparticle-effects-in-human-liver-and-intestinal-cells
#10
Albert Braeuning, Axel Oberemm, Josephine Görte, Linda Böhmert, Sabine Juling, Alfonso Lampen
Consumers are orally exposed to nanoparticulate or soluble species of the non-essential element silver due to its use in food contact materials or as a food additive. Potential toxicity of silver nanoparticles has gained special scientific attention. A fraction of ingested ionic or particulate silver is taken up in the intestine and transported to the liver, where it may induce oxidative stress and elicit subsequent adverse responses. Here, we present a comprehensive analysis of global proteomic changes induced in human Hep G2 hepatocarcinoma cells by different concentrations of AgPURE silver nanoparticles or by corresponding concentrations of ionic silver...
December 7, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/29214479/cities-of-the-future-bionic-systems-of-new-urban-environment
#11
Alicja Edyta Krzemińska, Anna Danuta Zaręba, Anna Dzikowska, Katarzyna Rozalia Jarosz
The concepts of the cities we know nowadays, and which we are accustomed to, change at a very rapid pace. The philosophy of their design is also changing. It will base on new standards, entering a completely different, futuristic dimension. This stage is related to changes in the perception of space, location and lack of belonging to definite, national or cultural structures. Cities of the future are cities primarily intelligent, zero-energetic, zero-waste, environmentally sustainable, self-sufficient in terms of both organic food production and symbiosis between the environment and industry...
December 7, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29211627/proprioceptive-flexible-fluidic-actuators-using-conductive-working-fluids
#12
Tim Helps, Jonathan Rossiter
Soft robotic systems generally require both soft actuators and soft sensors to perform complex functions. Separate actuators and sensors are often combined into one composite device when proprioception (self-sensing) is required. In this article, we introduce the concept of using a conductive liquid to perform both the sensing and actuation functions of a proprioceptive soft actuator. The working fluid drives actuator deformation while simultaneously acting as a strain-sensing component for detecting actuator deformation...
December 6, 2017: Soft Robotics
https://www.readbyqxmd.com/read/29200815/design-and-test-research-on-cutting-blade-of-corn-harvester-based-on-bionic-principle
#13
Kunpeng Tian, Xianwang Li, Bin Zhang, Qiaomin Chen, Cheng Shen, Jicheng Huang
Existing corn harvester cutting blades have problems associated with large cutting resistance, high energy consumption, and poor cut quality. Using bionics principles, a bionic blade was designed by extracting the cutting tooth profile curve of the B. horsfieldi palate. Using a double-blade cutting device testing system, a single stalk cutting performance contrast test for corn stalks obtained at harvest time was carried out. Results show that bionic blades have superior performance, demonstrated by strong cutting ability and good cut quality...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29190383/bionic-vision-social-work-and-community-development-a-research-participant-s-reflections
#14
Dianne Ashworth
This article discusses bionic vision through the author's experiences as Australia's first research participant in an early prototype bionic eye trial. During her two-year participation, she drew on various theoretical perspectives, including critical and community development approaches that not only influence her professional social work perspective, but extend to her personal worldview. In a rapidly emerging biotechnological age, this article contributes a holistic perspective, bringing into focus theory and practice; issues of human experience, human rights, and oppressive relationships; tensions between agency and structure (particularly relating to disability from a social model of disability and the medical model); and practical applications of artificial vision...
November 28, 2017: Health & Social Work
https://www.readbyqxmd.com/read/29184478/visual-prosthesis-interfacing-stimulating-electrodes-with-retinal-neurons-to-restore-vision
#15
REVIEW
Alejandro Barriga-Rivera, Lilach Bareket, Josef Goding, Ulises A Aregueta-Robles, Gregg J Suaning
The bypassing of degenerated photoreceptors using retinal neurostimulators is helping the blind to recover functional vision. Researchers are investigating new ways to improve visual percepts elicited by these means as the vision produced by these early devices remain rudimentary. However, several factors are hampering the progression of bionic technologies: the charge injection limits of metallic electrodes, the mechanical mismatch between excitable tissue and the stimulating elements, neural and electric crosstalk, the physical size of the implanted devices, and the inability to selectively activate different types of retinal neurons...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29178190/a-perspective-on-bio-mediated-material-structuring
#16
REVIEW
Steffi Deuerling, Sabine Kugler, Moritz Klotz, Cordt Zollfrank, Daniel Van Opdenbosch
Bioinspiration, biomorphy, biomimicry, biomimetics, bionics, and biotemplating are terms used to describe the fabrication of materials or, more generally, systems to solve technological problems by abstracting, emulating, using, or transferring structures from biological paradigms. Herein, a brief overview of how the different terminologies are being typically applied is provided. It is proposed that there is a rich field of research that can be expanded by utilizing various novel approaches for the guidance of living organisms for "bio-mediated" material structuring purposes...
November 27, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29160691/bioinspired-tribotronic-resistive-switching-memory-for-self-powered-memorizing-mechanical-stimuli
#17
Yihui Sun, Xin Zheng, Xiaoqin Yan, Qingliang Liao, Shuo Liu, Guangjie Zhang, Yong Li, Yue Zhang
Haptic memory, from the interaction of skin and brain, can not only perceive external stimuli but also memorize it after removing the external stimuli. For the mimicry of human sensory memory, a self-powered artificial tactile memorizing system were developed by coupling bionic electronic skin and nonvolatile RRAM. The tribotronic nanogenerator is utilized as electronic skin to transform the touching signal into electric pulse, which will be programmed into the artificial brain: RRAM. Owing to the advanced structural designs and accurately parameter matching, including the output voltages and the resistances in different resistive states, the artificial brain can be operated at self-powered mode to memorize the touch stimuli with the responsivity up to 2000%...
November 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29159354/self-assembled-nano-leaf-vein-bionic-structure-of-tio2-mos2-composites-for-photoelectric-sensors
#18
Qianyu Wang, Peng Yu, Lu Bai, Ruiying Bao, Ning Wang, Chuanbing Cheng, Zhengying Liu, Mingbo Yang, Wei Yang, Zhanhu Guo
Inspired by the leaf/vein structure of leaves which effectively supports the photosynthesis of green plants, a nano-leaf/vein bionic structure of self-assembled TiO2/MoS2 composites is applied to induce the reversible photochromic reactions of methylene blue (MB) for the first time. This reversible photochromic phenomenon gives a novel performance for the TiO2/MoS2 composites and expands their applications. Similar to the case where the natural vein network in leaves ensures the efficient material transfer and energy exchange for photosynthesis, the bionic internal MoS2 vein network in the composites ensures the efficient separation and directional transfer of photo-generated carriers to restrain the photocatalytic degradation reactions and to enhance the reversible photochromic reactions...
November 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/29156794/salen-mn-compounds-induces-cell-apoptosis-in-human-prostate-cancer-cells-through-promoting-ampk-activity-and-cell-autophagy
#19
Xiaoshuang Tang, Jing Jia, Feng Li, Wei Liu, Chao Yang, Bin Jin, Qi Shi, Xinyang Wang, Dalin He, Peng Guo
Currently only docetaxel has been approved to be used in the chemotherapy of prostate cancer and new drugs are urgent need. Salen-Mn is a novel type of synthetic reagent bionic and exerts remarkable anticancer activities. However, the effect of Salen-Mn on human prostate cancer has not been elucidated yet. In this study, we found that treatment of PC-3 and DU145 human prostate cancer cells with Salen-Mn inhibited cell growth in dose and time dependent manner. Moreover, Salen-Mn induced cell apoptosis, and increased the expression of apoptotic proteins, such as cleaved caspase-3, cleaved PARP, and Bax, in PC-3 and DU145 prostate cancer cells...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29123373/the-structure-and-flexural-properties-of-typha-leaves
#20
Jingjing Liu, Zhihui Zhang, Zhenglei Yu, Yunhong Liang, Xiujuan Li, Luquan Ren
The Typha leaf has a structure of lightweight cantilever beam, exhibiting excellent mechanical properties with low density. Especially, the leaf blade evolved high strength and low density with high porosity. In this paper, the structure of Typha leaf was characterized by microcomputed tomography (Micro-CT) and scanning electron microscopy (SEM), and the relationship with flexural properties was analyzed. The three-point bending test was performed on leaves to examine flexural properties, which indicated that the flexural properties vary from the base to the apex in gradient...
2017: Applied Bionics and Biomechanics
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