14,183 research outputs found
An Integrated Software-based Solution for Modular and Self-independent Networked Robot
An integrated software-based solution for a modular and self-independent
networked robot is introduced. The wirelessly operatable robot has been
developed mainly for autonomous monitoring works with full control over web.
The integrated software solution covers three components : a) the digital
signal processing unit for data retrieval and monitoring system; b) the
externally executable codes for control system; and c) the web programming for
interfacing the end-users with the robot. It is argued that this integrated
software-based approach is crucial to realize a flexible, modular and low
development cost mobile monitoring apparatus.Comment: 9 pages, Proceeding of the 10th International Conference on Control,
Automation, Robotics and Visio
Metal oxide semiconductor nanomembrane-based soft unnoticeable multifunctional electronics for wearable human-machine interfaces
Wearable human-machine interfaces (HMIs) are an important class of devices that enable human and machine interaction and teaming. Recent advances in electronics, materials, and mechanical designs have offered avenues toward wearable HMI devices. However, existing wearable HMI devices are uncomfortable to use and restrict the human body's motion, show slow response times, or are challenging to realize with multiple functions. Here, we report sol-gel-on-polymer-processed indium zinc oxide semiconductor nanomembrane-based ultrathin stretchable electronics with advantages of multifunctionality, simple manufacturing, imperceptible wearing, and robust interfacing. Multifunctional wearable HMI devices range from resistive random-access memory for data storage to field-effect transistors for interfacing and switching circuits, to various sensors for health and body motion sensing, and to microheaters for temperature delivery. The HMI devices can be not only seamlessly worn by humans but also implemented as prosthetic skin for robotics, which offer intelligent feedback, resulting in a closed-loop HMI system
Tactile sensing chips with POSFET array and integrated interface electronics
This work presents the advanced version of novel POSFET (Piezoelectric Oxide Semiconductor Field Effect Transistor) devices based tactile sensing chip. The new version of the tactile sensing chip presented here comprises of a 4 x 4 array of POSFET touch sensing devices and integrated interface electronics (i.e. multiplexers, high compliance current sinks and voltage output buffers). The chip also includes four temperature diodes for the measurement of contact temperature. Various components on the chip have been characterized systematically and the overall operation of the tactile sensing system has been evaluated. With new design the POSFET devices have improved performance (i.e. linear response in the dynamic contact forces range of 0.01–3N and sensitivity (without amplification) of 102.4 mV/N), which is more than twice the performance of their previous implementations. The integrated interface electronics result in reduced interconnections which otherwise would be needed to connect the POSFET array with off-chip interface electronic circuitry. This research paves the way for CMOS (Complementary Metal Oxide Semiconductor) implementation of full on-chip tactile sensing systems based on POSFETs
A cryptic RNA-binding domain mediates Syncrip recognition and exosomal partitioning of miRNA targets
Exosomal miRNA transfer is a mechanism for cell-cell communication that is important in the immune response, in the functioning of the nervous system and in cancer. Syncrip/hnRNPQ is a highly conserved RNA-binding protein that mediates the exosomal partition of a set of miRNAs. Here, we report that Syncrip's amino-terminal domain, which was previously thought to mediate protein-protein interactions, is a cryptic, conserved and sequence-specific RNA-binding domain, designated NURR (N-terminal unit for RNA recognition). The NURR domain mediates the specific recognition of a short hEXO sequence defining Syncrip exosomal miRNA targets, and is coupled by a non-canonical structural element to Syncrip's RRM domains to achieve high-affinity miRNA binding. As a consequence, Syncrip-mediated selection of the target miRNAs implies both recognition of the hEXO sequence by the NURR domain and binding of the RRM domains 5′ to this sequence. This structural arrangement enables Syncrip-mediated selection of miRNAs with different seed sequences. © 2018 The Author(s)
Service and device discovery of nodes in a wireless sensor network
Emerging wireless communication standards and more capable sensors and actuators have pushed further development of wireless sensor networks. Deploying a large number of sensor\ud
nodes requires a high-level framework enabling the devices to present themselves and the resources they hold. The device and the resources can be described as services, and in this paper, we review a number of well-known service discovery protocols. Bonjour stands out with its auto-configuration, distributed architecture, and sharing of resources. We also present a lightweight implementation in order to demonstrate that an emerging standards-based device and service discovery protocol can actually be deployed on small wireless sensor nodes
Kerangka rekabentuk Carta Selak Rangkaian Berintegrasi Teori Gagne Sembilan Peristiwa Pembelajaran
Kajian ini merupakan sebuah kajian terhadap Kerangka Rekabentuk Carta Selak
Rangkaian Berintegrasi Teori Gagne Sembilan Peristiwa Pembelajaran. Tujuan kajian
ini dilakukan adalah bagi mencadangkan sebuah Kerangka Rekabentuk Carta Selak
Rangkaian Berintegrasi Teori Gagne Sembilan Peristiwa Pembelajaran yang sesuai
diaplikasikan oleh bakal guru dan juga guru bagi sebuah sesi pengajaran dan
pembelajaran yang berkesan dan seterusnya meningkatkan kefahaman dan pengetahuan
pelajar dalam mata pelajaran yang diajar oleh guru. Metodologi yang digunakan adalah
berdasarkan Model ADDIE iaitu peringkat analisis, peringkat rekabentuk, peringkat
pembangunan, peringkat implimentasi dan peringkat penilaian. Hasil daripada dapatan
kajian yang menggunakan model TAM melihat persepsi dari kebergunaan (tahap tinggi
dan min 3.02), kesenangan mengguna (tahap tinggi dan min 3.03) dan sikap
penggunaan ( diterima dan min 2.65) terhadap Kerangka Rekabentuk Carta Selak
Rangkaian Berintegrasi Teori Gagne Sembilan Peristiwa Pembelajaran. Dapatan
tersebut menunjukkan bahawa ia digunakan dalam sesi pengajaran dan pembelajaran di
bilik darjah oleh responden pada masa hadapan. Cadangan kajian pada masa hadapan
adalah berkaitan spesifikasi dan teknikal kerangka rekabentuk supaya dapat
memudahkan pembinaan kerangka, menjimatkan kos dan masa
Charged dendrimers revisited: Effective charge and surface potential of dendritic polyglycerol sulfate
We investigate key electrostatic features of charged dendrimers at hand of
the biomedically important dendritic polyglycerol sulfate (dPGS) macromolecule
using multi-scale computer simulations and Zetasizer experiments. In our
simulation study, we first develop an effective mesoscale Hamiltonian specific
to dPGS based on input from all-atom, explicit-water simulations of dPGS of low
generation. Employing this in coarse-grained, implicit-solvent/explicit-salt
Langevin dynamics simulations, we then study dPGS structural and electrostatic
properties up to the sixth generation. By systematically mapping then the
calculated electrostatic potential onto the Debye-H\"uckel form -- that serves
as a basic defining equation for the effective charge -- we determine
well-defined effective net charges and corresponding radii, surface charge
densities, and surface potentials of dPGS. The latter are found to be up to one
order of magnitude smaller than the bare values and consistent with previously
derived theories on charge renormalization and weak saturation for high
dendrimer generations (charges). Finally, we find that the surface potential of
the dendrimers estimated from the simulations compare very well with our new
electrophoretic experiments
Single channel based interference-free and self-powered human-machine interactive interface using eigenfrequency-dominant mechanism
The recent development of wearable devices is revolutionizing the way of
human-machine interaction (HMI). Nowadays, an interactive interface that
carries more embedded information is desired to fulfil the increasing demand in
era of Internet of Things. However, present approach normally relies on sensor
arrays for memory expansion, which inevitably brings the concern of wiring
complexity, signal differentiation, power consumption, and miniaturization.
Herein, a one-channel based self-powered HMI interface, which uses the
eigenfrequency of magnetized micropillar (MMP) as identification mechanism, is
reported. When manually vibrated, the inherent recovery of the MMP caused a
damped oscillation that generates current signals because of Faraday's Law of
induction. The time-to-frequency conversion explores the MMP-related
eigenfrequency, which provides a specific solution to allocate diverse commands
in an interference-free behavior even with one electric channel. A cylindrical
cantilever model was built to regulate the MMP eigenfrequencies via precisely
designing the dimensional parameters and material properties. We show that
using one device and two electrodes, high-capacity HMI interface can be
realized when the MMPs with different eigenfrequencies have been integrated.
This study provides the reference value to design the future HMI system
especially for situations that require a more intuitive and intelligent
communication experience with high-memory demand.Comment: 35 pages, 6 figure
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