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https://www.readbyqxmd.com/read/29790513/dynamics-in-a-one-dimensional-ferrogel-model-relaxation-pairing-shock-wave-propagation
#1
Segun Goh, Andreas M Menzel, Hartmut Löwen
Ferrogels are smart soft materials, consisting of a polymeric network and embedded magnetic particles. Novel phenomena, such as the variation of the overall mechanical properties by external magnetic fields, emerge consequently. However, the dynamic behavior of ferrogels remains largely unveiled. In this paper, we consider a one-dimensional chain consisting of magnetic dipoles and elastic springs between them as a simple model for ferrogels. The model is evaluated by corresponding simulations. To probe the dynamics theoretically, we investigate a continuum limit of the energy governing the system and the corresponding equation of motion...
May 23, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29786914/conductive-hydrogels-as-smart-materials-for-flexible-electronic-devices
#2
Qinfeng Rong, Wenwei Lei, Mingjie Liu
Flexible conductive materials have gained considerable research interest in recent years because of their potential applications in flexible energy storage devices, sensors, touch panels, electronic-skins, etc. With excellent flexibility, outstanding electric properties and tunable mechanical properties, conductive hydrogels as conductive materials offer plentiful insights and opportunities for flexible electronic devices. Numerous synthetic strategies have been developed to obtain various conductive hydrogels, and high-performance devices based on these conductive hydrogels have been realized...
May 22, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29767987/a-full-visible-spectrum-invisibility-cloak-for-mesoscopic-metal-wires
#3
Sang-Woo Kim, Byeong Wan An, Eunjin Cho, Byung Gwan Hyun, Yoon-Jong Moon, Sun-Kyung Kim, Jang-Ung Park
Structured metals can sustain a very large scattering cross-section that is induced by localized surface plasmons, which often has an adverse effect on their use as transparent electrodes in displays, touch screens, and smart windows due to an issue of low clarity. Here, we report a broadband optical cloaking strategy for the network of mesoscopic metal wires with submicrometer to micrometer diameters, which is exploited for manufacturing and application of high-clarity metal-wires-based transparent electrodes...
May 16, 2018: Nano Letters
https://www.readbyqxmd.com/read/29760967/blood-vessel-detection-localization-and-estimation-using-a-smart-laparoscopic-grasper-a-monte-carlo-study
#4
Amal Chaturvedi, Shetha A Shukair, Paul Le Rolland, Mayank Vijayvergia, Jonathan W Gunn, Hariharan Subramanian
For centuries, surgeons have relied on their sense of touch to identify vital structures such as blood vessels in traditional open surgery. Over the past two decades, surgeons have shifted to minimally invasive surgical (MIS) approaches, including laparoscopic surgery, which include benefits such as less scarring, less risk for infection, and quicker recovery times. In fact, some surgeries such as cholecystectomies have seen more than an 80% adoption of this technique because of those benefits. However, due to the fundamental challenges associated with using laparoscopic surgery, there has been a lower adoption in more complex specialties, such as colorectal and thoracic surgery, where the field of surgery has bleeding, fat, scar tissue, and adhesions...
May 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29745552/-intelligent-watch-system-for-health-monitoring-based-on-bluetooth-low-energy-technology
#5
Ji Wang, Hailiang Guo, Xiaoli Ren
According to the development status of wearable technology and the demand of intelligent health monitoring, we studied the multi-function integrated smart watches solution and its key technology. First of all, the sensor technology with high integration density, Bluetooth low energy (BLE) and mobile communication technology were integrated and used in develop practice. Secondly, for the hardware design of the system in this paper, we chose the scheme with high integration density and cost-effective computer modules and chips...
August 1, 2017: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
https://www.readbyqxmd.com/read/29738616/commentary-2018-stroke-guidelines
#6
Andrew D Perron
I read with interest (and some degree of disappointment) the new 2018 Stroke Guidelines published in January of this year that are labeled prominently "Endorsed by SAEM".1 To be clear, my disappointment has nothing to do with the use of tPA in acute ischemic stroke (I am happy to let others lead that charge). I am an admitted agnostic when it comes to the use of tPA (it helps some, it harms others, and we need to be really smart in its use to maximize the former and minimize the latter). Rather, it was notable to me that while the new guidelines touch a large number of specialties (Internal Medicine, Pharmacy, Nutrition, Rehabilitation, Radiology, Neurology, and Interventionalists to name a few), only one specialty merited a new Level 1A recommendation for targeted education This article is protected by copyright...
May 8, 2018: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
https://www.readbyqxmd.com/read/29685301/single-source-dna-profile-recovery-from-single-cells-isolated-from-skin-and-fabric-from-touch-dna-mixtures-in-mock-physical-assaults
#7
Katherine Farash, Erin K Hanson, Jack Ballantyne
The ability to obtain DNA profiles from trace biological evidence is routinely demonstrated with so-called 'touch DNA evidence', which is generally perceived to be the result of DNA obtained from shed skin cells transferred from a donor's hands to an object or person during direct physical contact. Current methods for the recovery of trace DNA employ swabs or adhesive tape to sample an area of interest. While of practical utility, such 'blind-swabbing' approaches will necessarily co-sample cellular material from the different individuals whose cells are present on the item, even though the individuals' cells are principally located in topographically dispersed, but distinct, locations on the item...
May 2018: Science & Justice: Journal of the Forensic Science Society
https://www.readbyqxmd.com/read/29628753/motorized-micro-forceps-with-active-motion-guidance-based-on-common-path-ssoct-for-epiretinal-membranectomy
#8
Gyeong Woo Cheon, Berk Gonenc, Russell H Taylor, Peter L Gehlbach, Jin U Kang
In this study, we built and tested a handheld motion-guided micro-forceps system using common-path swept source optical coherence tomography (CP-SSOCT) for highly accurate depth controlled epiretinal membranectomy. A touch sensor and two motors were used in the forceps design to minimize the inherent motion artifact while squeezing the tool handle to actuate the tool and grasp, and to independently control the depth of the tool-tip. A smart motion monitoring and a guiding algorithm were devised to provide precise and intuitive freehand control...
December 2017: IEEE/ASME Transactions on Mechatronics
https://www.readbyqxmd.com/read/29576803/materials-library-collections-as-tools-for-interdisciplinary-research
#9
S E Wilkes, M A Miodownik
This paper examines how materials libraries are used as tools for interdisciplinary collaboration in 3 research projects that inhabit a disciplinary triangle between materials research, design and user needs: PhysFeel , which explores how materials collections can be used in psychological therapies; Light.Touch.Matters , a design-led project to develop new smart materials; and Hands of X , which uses materials collections to develop a bespoke prosthetics service. The paper analyses and contrasts these case studies to better understand the affordances and limitations of materials collections when used as research, translational and design tools...
2018: Interdisciplinary Science Reviews: ISR
https://www.readbyqxmd.com/read/29534314/stretchable-triboelectric-photonic-smart-skin-for-tactile-and-gesture-sensing
#10
Tianzhao Bu, Tianxiao Xiao, Zhiwei Yang, Guoxu Liu, Xianpeng Fu, Jinhui Nie, Tong Guo, Yaokun Pang, Junqing Zhao, Fengben Xi, Chi Zhang, Zhong Lin Wang
Smart skin is expected to be stretchable and tactile for bionic robots as the medium with the ambient environment. Here, a stretchable triboelectric-photonic smart skin (STPS) is reported that enables multidimensional tactile and gesture sensing for a robotic hand. With a grating-structured metal film as the bioinspired skin stripe, the STPS exhibits a tunable aggregation-induced emission in a lateral tensile range of 0-160%. Moreover, the STPS can be used as a triboelectric nanogenerator for vertical pressure sensing with a maximum sensitivity of 34 mV Pa-1 ...
April 2018: Advanced Materials
https://www.readbyqxmd.com/read/29527686/home-exercise-programs-supported-by-video-and-automated-reminders-for-patients-with-stroke-a-qualitative-analysis
#11
Kellie B Emmerson, Katherine E Harding, Kylee J Lockwood, Nicholas F Taylor
BACKGROUND: Allied health professionals working in rehabilitation often prescribe home exercise programs. Smart technology offers an alternative format for presentation of home exercise programs with potential advantages over traditional paper-based programs, but how do patients feel about this? DESIGN: This qualitative analysis was part of a convergent mixed methods design, using in depth, semi-structured interviews to explore the lived experience of patients utilising touch screen tablets to support an upper limb home exercise program post stroke...
March 11, 2018: Australian Occupational Therapy Journal
https://www.readbyqxmd.com/read/29503783/surface-microbiology-of-smartphone-screen-protectors-among-healthcare-professionals
#12
Ibrahim Raza, Awais Raza, Syed Ahmad Razaa, Ahmad Bani Sadar, Ahmad Uzair Qureshi, Usama Talib, Gerald Chi
BACKGROUND: The use of smartphones with touch screens has become a norm for healthcare professionals (HCP). The risk of smart screen contamination has been proven, and guidelines are available to deal with possible contamination. A large number of smartphone users apply plastic or glass screen protectors onto their mobile phone screens to prevent scratches. However, these materials are not scratch proof, and their antipathogenic properties have not been studied. METHODS: We have conducted a study to determine the frequency of smartphone screen protector contamination and compared the data with contamination on the bare area on the same mobile screens...
December 26, 2017: Curēus
https://www.readbyqxmd.com/read/29194414/marked-object-recognition-multitouch-screen-printed-touchpad-for-interactive-applications
#13
Jivago Serrado Nunes, Nelson Castro, Sergio Gonçalves, Nélson Pereira, Vitor Correia, Senentxu Lanceros-Mendez
The market for interactive platforms is rapidly growing, and touchscreens have been incorporated in an increasing number of devices. Thus, the area of smart objects and devices is strongly increasing by adding interactive touch and multimedia content, leading to new uses and capabilities. In this work, a flexible screen printed sensor matrix is fabricated based on silver ink in a polyethylene terephthalate (PET) substrate. Diamond shaped capacitive electrodes coupled with conventional capacitive reading electronics enables fabrication of a highly functional capacitive touchpad, and also allows for the identification of marked objects...
December 1, 2017: Sensors
https://www.readbyqxmd.com/read/29111642/a-stretchable-and-transparent-nanocomposite-nanogenerator-for-self-powered-physiological-monitoring
#14
Xiaoliang Chen, Kaushik Parida, Jiangxin Wang, Jiaqing Xiong, Meng-Fang Lin, Jinyou Shao, Pooi See Lee
Smart sensing electronic devices with good transparency, high stretchability, and self-powered sensing characteristics are essential in wearable health monitoring systems. This paper innovatively proposes a stretchable nanocomposite nanogenerator with good transparency that can be conformally attached to the human body to harvest biomechanical energy and monitor physiological signals. The work reports an innovative device that uses sprayed silver nanowires as transparent electrodes and sandwiches a nanocomposite of piezoelectric BaTiO3 and polydimethylsiloxane as the sensing layer, which exhibits good transparency and mechanical transformability with stretchable, foldable, and twistable properties...
December 6, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29084262/press-touch-code-a-finger-press-based-screen-size-independent-authentication-scheme-for-smart-devices
#15
M S A Noman Ranak, Saiful Azad, Nur Nadiah Hanim Binti Mohd Nor, Kamal Z Zamli
Due to recent advancements and appealing applications, the purchase rate of smart devices is increasing at a higher rate. Parallely, the security related threats and attacks are also increasing at a greater ratio on these devices. As a result, a considerable number of attacks have been noted in the recent past. To resist these attacks, many password-based authentication schemes are proposed. However, most of these schemes are not screen size independent; whereas, smart devices come in different sizes. Specifically, they are not suitable for miniature smart devices due to the small screen size and/or lack of full sized keyboards...
2017: PloS One
https://www.readbyqxmd.com/read/29065259/an-all-silk-derived-dual-mode-e-skin-for-simultaneous-temperature-pressure-detection
#16
Chunya Wang, Kailun Xia, Mingchao Zhang, Muqiang Jian, Yingying Zhang
Flexible skin-mimicking electronics are highly desired for development of smart human-machine interfaces and wearable human-health monitors. Human skins are able to simultaneously detect different information, such as touch, friction, temperature, and humidity. However, due to the mutual interferences of sensors with different functions, it is still a big challenge to fabricate multifunctional electronic skins (E-skins). Herein, a combo temperature-pressure E-skin is reported through assembling a temperature sensor and a strain sensor in both of which flexible and transparent silk-nanofiber-derived carbon fiber membranes (SilkCFM) are used as the active material...
November 3, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29037757/testing-smart-glasses-in-urology-clinical-and-surgical-potential-applications
#17
E García-Cruz, A Bretonnet, A Alcaraz
OBJECTIVES: We aimed to explore the potential benefits of using smart glasses - wearable computer optical devices with touch-less command features - in the surgery room and in outpatient care settings in urology. MATERIALS AND METHODS: Between April and November 2015, 80 urologists were invited to use Google Glass in their daily surgical and clinical practice, and to share them with other urologists. Participants rated the usefulness of smart glasses on a 10-point scale, and provided insights on their potential benefits in a telephone interview...
October 13, 2017: Actas Urologicas Españolas
https://www.readbyqxmd.com/read/28980082/accuracy-of-daily-fluid-intake-measurements-using-a-smart-water-bottle
#18
Michael S Borofsky, Casey A Dauw, Nadya York, Colin Terry, James E Lingeman
High fluid intake is an effective preventative strategy against recurrent kidney stones but is known to be challenging to achieve. Recently, a smart water bottle (Hidrate Spark™, Minneapolis, MN) was developed as a non-invasive fluid intake monitoring system. This device could help patients who form stones from low urine volume achieve sustainable improvements in hydration, but has yet to be validated in a clinical setting. Hidrate Spark™ uses capacitive touch sensing via an internal sensor. It calculates volume measurements by detecting changes in water level and sends data wirelessly to users' smartphones through an application...
October 4, 2017: Urolithiasis
https://www.readbyqxmd.com/read/28894245/an-extremely-simple-macroscale-electronic-skin-realized-by-deep-machine-learning
#19
Kee-Sun Sohn, Jiyong Chung, Min-Young Cho, Suman Timilsina, Woon Bae Park, Myungho Pyo, Namsoo Shin, Keemin Sohn, Ji Sik Kim
Complicated structures consisting of multi-layers with a multi-modal array of device components, i.e., so-called patterned multi-layers, and their corresponding circuit designs for signal readout and addressing are used to achieve a macroscale electronic skin (e-skin). In contrast to this common approach, we realized an extremely simple macroscale e-skin only by employing a single-layered piezoresistive MWCNT-PDMS composite film with neither nano-, micro-, nor macro-patterns. It is the deep machine learning that made it possible to let such a simple bulky material play the role of a smart sensory device...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28738675/transparent-and-flexible-triboelectric-sensing-array-for-touch-security-applications
#20
Zuqing Yuan, Tao Zhou, Yingying Yin, Ran Cao, Congju Li, Zhong Lin Wang
Tactile sensors with large-scale array and high sensitivity is essential for human-machine interaction, smart wearable devices, and mobile networks. Here, a transparent and flexible triboelectric sensing array (TSA) with fingertip-sized pixels is demonstrated by integrating ITO electrodes, FEP film, and signal transmission circuits on an undivided palm-sized polyethylene terephthalate substrate. The sensing pixels can be triggered by the corresponding external contact to induce the electrostatic potential in the transparent electrodes without power consumption, which is individually recognized by the sensor...
August 22, 2017: ACS Nano
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