K3 Telecom one year celebration of strong internet and television servicesThe K3 Telecom-Liberia yesterday celebrated its first year of successful operation and triple-play services in Monrovia on their own wireless broadband network to the amazement of the several invited guests.K3 Telecom AG is a Swiss-based global telecommunications operator with unique wireless K3 Air Last mile solution technology; engaged in the business of co-investing, establishment of telecommunication networks and offering ISP provider services (Triple play services – Broadband Internet, Digital TV and Fixed.Mohammed Nasrallah, CEO of K3 Liberia, expressed how proud he is to see that the television has been serving the public successfully since it was established in the country a year ago, noting, “because of the satisfaction of our consumers remains our primary concern, it therefore allows us to introduce a support service that will apply to the needs of the consumers on a daily basis.”And because of the success story, Mr. Nasrallah says the K3 management plans to decentralize its programs to widely cover Montserrado, Margibi and other counties beyond, since the television is receiving reports of improved signal quality from the population.“So we want to also connect our customers because that is part of the human rights component,” he said.For the past year, K3 has no competitor on the market, because it is offering both satellite for television and also provides very strong internet services, the company says.“You cannot compare K3 Telecom to a TV provider in the country, because we give our customers on the spot TV coverage as well as internet facility,” Nasrallah said.He spoke of how the entity’s major achievement as a satellite television provider is now being discussed as a strong and valuable internet that the country can boast of since it is on par with some of the developed countries.“This is going to go stronger and higher than the way we started,” Nasrallah told the gathering.The good thing about K3, according to him, is that unlike other service providers, it has powerful services during the rainy season. Also, it is not limited to a special group of people, but affordable to everyone, he said.“It is really hard to believe that the K3 operation in Liberia began one year ago because of the tremendous improvement. A lot has happened and been achieved, and therefore we are, ourselves, a premium Liberian ISP provider with superior triple-play service; high speed broadband internet; digital TV and IP telephony,” Nasrallah told the already elated audience at a press conference yesterday.Uros Mlakar, CEO of K3 Telecom AG Switzerland, spoke of how K3-Liberia is excited to announce the start of their new internship program that will train selected people in new skills in technical, commercial and financial fields.Mlakar said the new program will last for two months, after which it will be renewed depending on successful implementation, because successful trainees will have a better chance of gaining employment with their newly developed skills.K3 Telecom-Liberia is a subsidiary company of K3 Telecom AG, Switzerland, and is committed to provide modern triple play services based on broadband to the Liberian public.The entity, according to Mlakar, has a dream to expand services throughout Africa so as to better the lives of the people.“Africa is changing fast, and therefore, very soon, things will never be the same as it has been until the advent of the K3 telecom, because internet is like water that everyone deserves to have access to its broadband,” Mlakar declared.Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)
MILWAUKEE (AP) — A Milwaukee officer involved in the stun gun arrest of Bucks’ player Sterling Brown has been fired because of social media posts mocking the incident, the city’s police chief said Thursday.Police Chief Alfonso Morales said the firing decision was not tied to anything Erik Andrade did when Brown was arrested, but explained that the social media posts compromised the officer’s ability to testify in other cases. Morales spoke about the case at a Marquette University event.FILE – In this April 1, 2018, file photo, Milwaukee Bucks guard Sterling Brown is seen during an NBA basketball game in Denver. A Milwaukee police officer involved in the stun gun arrest of Bucks’ player Sterling Brown has been fired because of social media posts. (AP Photo/David Zalubowski, File)Brown sued the police department in June and accused officers of using excessive force and targeting him because he’s black. A group of officers swarmed on him at a Walgreens parking lot because he didn’t immediately remove his hands from his pockets. Brown was standing with the officers waiting for a citation for parking in a disabled spot early on Jan. 26, but never appeared to threaten police before or during his arrest, according to police body camera videos.Andrade later mocked Brown on Facebook for his arrest.“Nice meeting Sterling Brown of the Milwaukee Bucks at work this morning! Lol#FearTheDeer,” one Facebook post read, referencing a slogan used to cheer on the Bucks at games. Andrade also posted a racist meme of Golden State Warriors star Kevin Durant.Morales said in a statement that Andrade’s posts violate the department’s social media policies.“They have a racist connotation and are derogatory, mocking an individual who was recently the subject of officers’ use of force,” Morales said. “Such comments also directly affect his credibility and ability to testify in future hearings as a member of this Department. I have not, and will not, tolerate such behavior.”Andrade was at the scene when Brown was arrested but was not among the officers who took him down, according to police. A total of 11 officers involved in the arrest were disciplined or retrained, but Andrade was not among those punished at the time.The president of the Milwaukee Police Association, Mike Crivello, did not immediately respond to an email seeking comment on behalf of Andrade. Andrade does not have a listed phone number.Morales apologized to Brown for his officers’ actions and the Bucks’ second-year guard was never charged with anything.
© 2019 Science X Network Controlling neurons with light—but without wires or batteries , Science For this, the team coupled a microscale light-emitting diode (LED) with two millimeter-scale coils to create an inductive charging system, which delivered instantaneous power at biologically safe frequencies in an experimental rodent (rat) model. The wireless setup stimulated neurons in the visual cortex, while maintaining the temperature increase below 10C as a critical safety threshold for biomedical implants. The results are now published on Microsystems and Nanoengineering. Khan et al. introduced a single channel neurostimulator containing a reflector-coupled, microscale light-emitting diode (µLED) with an integrated millimeter sized wireless receiver (RX) coil. The experimental setup allowed for free-floating, battery-free, untethered optogenetics neuromodulation. They used a two-coil inductive link in the system to deliver instantaneous power at a low operating frequency (<100 MHz) for continuous optical stimulation. The process posed minimal invasiveness and tissue exposure to electromagnetic radiation. When they coupled a microscale reflector to the µLED, the optical-reflector displayed significantly enhanced light intensity compared to bare µLED. The scientists controlled the operational temperature of the setup for implant biocompatibility and conducted in vivo experiments in rats, followed by histological studies to verify the efficacy of wireless optical stimulation in the primary visual cortex of the animal model. They visualized the process using c-Fos biomarker, which appeared green on immunostaining, as a reporter of light-evoked neuronal activity. TOP: Simulation model for the inductive coupling at cross-section planes. Plane 3 refers to the bottom plane of the Tx coil (z axis displacement, z = 0), plane 1, 2, 4 refers to z = 2.5 mm, z = 1 mm, and z = −1 mm, respectively. (a) The simulation model in HFSS. Magnetic flux distributions for (b) plane 1, (c) plane 2, (d) plane 3, and (e) plane 4. Induced magnetic flux by the Rx coil at plane 2, while the Rx is positioned at f Tx center and g Tx periphery. Units of flux distributions provided in the color map legend. BOTTOM: Optical and thermal characteristics. (a) Light penetration through tissue sections with a coupled reflector (n = 5), (b) intensity improvement of reflector coupled stimulator compared with a bare μ-LED, and (c) change in temperature for devices stimulating through a 500 μm cortical tissue slice (n = 3). Credit: Microsystems & Nanoengineering, doi: 10.1038/s41378-019-0061-6 System validation using Immuno-histology. (a) In vivo stimulation using a wirelessly-powered neurostimulator on the V1 of an anaesthetized rat. (b) quantitative representation of c-Fos expressed cells using cell sorting. Fluorecent images of mCherry (c, e) as well as c-Fos (d, f) expressions of the control and stimulated cortices, respectively, obtained from the same cortical areas of the same transfected animal. (g, h) c-Fos expressions of the control and stimulated cortices, respectively, obtained from a non-transfected animal. Credit: Microsystems & Nanoengineering, doi: 10.1038/s41378-019-0061-6 Discoveries and inventions in neuroscience have recently progressed rapidly due to advances in semiconductor implants in neurobiological systems, for successful clinical translation. For example, scientists can use implantable "electroceuticals" in a new medical approach to target the central and peripheral nervous system during therapeutic intervention. As a result, optogenetics is finding new applications in neuroscience to deliver light to neural tissues of interest while collecting readouts from cells using targeted control tools. The ability to implant miniature optical sources, recording electrodes, sensors and other components in to designated areas of the brain has renewed the optimism for long-term diagnostics and therapeutics. Using such developments, scientists can study the transmission of primary sensory information to specific domains of the brain, including the olfactory, visual and auditory regions in depth. They can also use the technique to understand cells that drive or inhibit fundamental bioactivities such as hunger, thirst, energy balance and respiration via activity patterns. , Nature Methods Conceptual diagram of the wirelessly-powered opto neuro-stimulator and its placement over the cortex of the animal (rodent) brain. Credit: Microsystems & Nanoengineering, doi: 10.1038/s41378-019-0061-6 Explore further "" The scientists then conducted in vivo experiments in transfected rats (foreign DNA introduced into cells) to then implement the proposed surgical procedures. They followed the experiments with immunohistochemical assays to validate the efficacy of the cell transfection procedure and the subsequent optical stimulation procedure in the rats. During transfection, they induced the expression of channelrhodopsin-2 in the animal models with a viral solution and then placed the coiled stimulator on the primary visual cortex (V1 lobe) of the animal for subsequent optical stimulation. The scientists coupled the coiled stimulator to a Tx coil and used the other V1 lobe of the same animal as a control sample. After completing the in vivo experiments, the scientists analyzed the expression of c-Fos (green dye) in the stimulated vs. non-stimulated lobe to identify neural activity. For this, Khan et al. used immunobiological assays in the work and observed elevated c-Fos expression (green) within the virus-transfected cortex (red) induced by LED stimulation of the experimental neurostimulator. In this way, Khan et al. designed, fabricated and characterized a reflector-coupled, wireless single-channel optical neurostimulator with a mm-sized receiver coil for optogenetic neuromodulation. The reflector-coupled stimulator allowed higher performance compared to bare µLED in the present work. The scientists studied the performance of the two-coil telemetry link using analytical circuit models, FEM stimulations and experimental approaches. They verified the proposed potential of the neurostimulator in a rat model with upregulated cellular activity observed via optical stimulation. Khan et al. will aim to conduct further investigations in the future to miniaturize the devices for neurobiological applications. The scientists tested the surface morphology of the prototype using scanning electron microscopy to observe the cavity array after isotropic silicon etching and surface aluminum coating. They then tested the surface roughness using atomic force microscopy to detect surfaces that created negligible light scattering for optimally enhanced light intensity and activated the neurostimulator on a benchtop setup via inductive powering. The scientists also incorporated Parylene-c to engineer the constructs due to inherent biocompatibility of the material, although they observed potential cracking as before as a result of high temperatures in the engineering process. Khan et al. simulated electromagnetic properties of the inductive link between the Rx and Tx coils using the finite element method (FEM) and high frequency structure stimulator (HFSS) software; to show similarities between the simulated Tx coil and those engineered in the work. The scientists investigated the optical properties and showed that the neurostimulator could reach deep brain cells less invasively compared to a waveguide or penetrating probes. While the data showed superior optical performance of the reflector-coupled stimulator, the intensity reduced heavily with thicker tissue sections. The intensity of the reflector-coupled stimulator was significantly higher in the present work compared with a bare stimulator for effective deep brain stimulation without deep-brain tissue invasion. Khan et al. similarly tested and optimized the thermal properties, electromagnetic properties and the power transfer efficacy of the neurostimulator prototype. To conduct translational studies in an animal model, the scientists proposed implanting the resonator coil between the skull and skin without wire connections to the Tx or Rx coil. Optogenetics must target the neural population without altering the natural behavior of animal models for accurate applications in medicine. Pioneering work by researchers in the field have led to the development of several optimized neuro-stimulators with mid-field radiofrequency (RF) and far-field power transfer. However, scientists are yet to report on a fully implantable and miniaturized high voltage (HV) stimulator that provides precise stimulation control of the parameters of interest. An ideal wireless optical implant must therefore:Be miniature in the millimeter scale (mm) to prevent invasive surgical infection, inflammation and post-surgical trauma.Allow highly efficient power transfer and long-distance communication to deep region target neurons with aims for human applications.A significant challenge with engineering such implants is the energy required to optically activate optogenetic opsins, which typically include a few mWs, although greater than the values for conventional electrical stimulation or data communication. To solve this challenge, Khan and co-workers proposed a fully implantable, mini wireless optical stimulator to deliver sufficient power for µLED operations—without surpassing the operational temperature. In the proposed system, they included a solenoid transmitter (TX) coil and receiver (RX) unit. In a proof-of-concept of the proposed prototype, Khan et al. used a blue µLED (465 nm wavelength) of 270 µm x 220 µm surface area to optically excite neurons expressing channelrhodopsin. To validate the functionality of the device in an animal model, the scientists placed the Tx coil outside the brain and inductively coupled it to the Rx coil, which was integrated to the µLED neurostimulator placed within a craniotomy cavity. The scientists used the free-floating method for epidural optical neuromodulation in the craniotomy cavity located on top of the dura mater. Citation: Biotechnology: Using wireless power to light up tiny neural stimulators (2019, June 10) retrieved 18 August 2019 from https://phys.org/news/2019-06-biotechnology-wireless-power-tiny-neural.html More information: Wasif Khan et al. Inductively coupled, mm-sized, single channel optical neuro-stimulator with intensity enhancer, Microsystems & Nanoengineering (2019). DOI: 10.1038/s41378-019-0061-6 Kristoffer Famm et al. A jump-start for electroceuticals, Nature (2013). DOI: 10.1038/496159a Karl Deisseroth. Optogenetics, Nature Methods (2010). DOI: 10.1038/nmeth.f.324T.-i. Kim et al. Injectable, Cellular-Scale Optoelectronics with Applications for Wireless Optogenetics, Science (2013). DOI: 10.1126/science.1232437 Conceptual diagram of the inductively coupled neuro stimulator system. (a) An overview of the inductive link system. (b) Conceptual diagram of the wirelessly-powered opto neuro-stimulator and its placement over the cortex of the animal brain. Credit: Microsystems & Nanoengineering, doi: 10.1038/s41378-019-0061-6 Characterization results and images of an operating prototype. (a, b) SEM images of the etched Si cavity. (c, d) Post and prior Al coating of the cavity, respectively. (e, f) AFM images for quantitative analysis of cavity surface roughness (x axis units in μm, y axis in nm). (g) Fabricated single-channel opto neurostimulator. h Rx-coil coupled single-channel opto neurostimulators. (i, j) An opto stimulator powered wirelessly by a Tx coil. Credit: Microsystems & Nanoengineering, doi: 10.1038/s41378-019-0061-6 Journal information: Nature This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Implantable optical devices that target neurons can be improved using miniature coils smaller than a grain of rice using optogenetic technology. Scientists can propagate pulses of light using the method to turn protein expression on or off in genetically modified neurons. Neuroscientists have used bulky cables and batteries to control and collect data from such experimental setups so far. In a recent study, Wasif Khan and a team of researchers in the interdisciplinary departments of Electrical and Computer Engineering and Physiology in the U.S. developed a completely wireless prototype to replace the bulky hardware.
Seven states have proposed to come up with their own model to roll out broadband network proposed under Rs 72,000 crore BharatNet
Free Webinar | Sept 5: Tips and Tools for Making Progress Toward Important Goals Sure, you can 3-D print key chains, belt buckles, smartphone cases and any number of other consumer goods. But why stop there? If you had a printer large enough, why not 3-D print something really awesome? Say, a house?Sound outrageous? To a group of architects in Amsterdam, it’s a vision of the future. And that future might become a reality sooner than you think.Hedwig Heinsman, an architect with the Dutch firm Dus, is heading up an experiment called Canal House. As you might imagine, the goal is to 3-D print an entire house.Heinsman and her team have created a massive 3-D printer called the Kamermaker, or “room-builder.” Essentially, it is a scaled-up version of the popular Ultimaker open-source 3-D printer, the team says. It takes the contraption about a week to print each honeycomb-like block — each weighing about 400 pounds.”We can recycle waste materials into printable materials, eliminate large transport costs and make unique and personalized architecture,” Heinsman says. “You can print buildings, and then just [tear them down], and then print them anew.” Once each block is printed, they are fitted together, sort of like Legos, then filled with a foam-like material that hardens and fastens the blocks together. Pretty neat.In a city known for its luxurious canal houses and charming gabled facades, a plastic, 3-D-printed house is sure to stand out. The construction site has already been transformed into an exhibit that’s open to the public.Could this be the future of housing construction? Turns out, the brilliant minds in Amsterdam aren’t the only ones dreaming up ways to 3-D print an entire house. A team at the University of Southern California has built a giant 3-D printer of its own — except this one comes equipped with a nozzle that spits out concrete. Its creators say it might be able to create a 2,500-square-foot home in about 24 hours.This process is called “contour crafting.” This video shows a bit more about how it works: Register Now » March 18, 2014 2 min read Attend this free webinar and learn how you can maximize efficiency while getting the most critical things done right.
The team at Gradle has now released Gradle 5.0 after Gradle 4.9 was released in July this year. Gradle 5.0 is faster, safer and more capable than the previous ones. Gradle is a build tool which accelerates developer productivity as it helps teams build, automate and deliver software faster. This tool focuses on build automation and support for multi-language development. Improvements in Gradle 5.0 Gradle 5.0 comes incremental compilation and annotation processing to enhance caching and up-to-date checking. Gradle 5.0 also brings features such as Kotlin DSL, dependency version alignment, version locking, task timeouts, Java 11 support, and more. The Kotlin DSL helps the IDE users in code completion and refactoring. Faster builds with build cache Users can experience faster builds the moment they upgrade to Gradle 5.0. Gradle 5.0 allows developers and business executives to build only what is needed by using the build cache and incremental processing features. The build cache reuses the results of previous executions and makes the process faster. It also reduces the build time by approximately 90%. Incremental Java compilation and annotation processing Gradle 5.0 features an incremental compiler. Now, there is no need for CompileJava tasks to recompile all the source files except for the the first time This compiler is default in this version and is highly optimized. It also supports incremental annotation processing which increases the effectiveness of incremental compilation in the presence of annotation processors. Users have to upgrade to the latest version (5.0) of the processors to experience the annotation processing. The new annotationProcessor configuration is used to manage the annotation processors and for putting them on the annotation processor path. Fine-grained transitive dependency management Gradle 5.0 comes with new features for customizing dependencies and features for improved POM and BOM support. Gradle 5.0 supports dependency constraints that are used to define versions or version ranges to restrict direct and transitive dependency versions. In this version, the platform definitions or Maven BOM dependencies are natively supported which allows the use of Spring Boot platform definition without using an external plugin. The dependency alignment aligns the modules in a logical group. With this release, the dynamic dependency versions can now be locked for better build reproducibility. This version can import bill of materials (BOM) files. Writing Gradle build logic Users can now write Gradle build scripts in Kotlin. The functionality of Static-typing in Kotlin allows tools to provide better IDE assistance to the users. More memory efficient Gradle execution The lower memory requirements and cache cleanup reduces Gradle’s overhead on the system. In Gradle 5.0, many caching mechanisms have been optimized for reducing the default memory for Gradle processes. New Gradle invocation options This version supports JUnit 5: JUnit Platform, JUnit Jupiter, and JUnit Vintage which helps in enabling test grouping and filtering. The tasks for non-interactive environments like continuous integration execution group the log messages. It’s now easy to identify if a test has failed with arich command-line console as it shows a colored build status. One can now work on interdependent projects with the help of composite builds in Gradle 5.0. This release of Gradle supports custom arguments which help in running Java applications faster and easier. New Gradle task and plugin APIs This version of Gradle features a new Worker API for safe parallel and asynchronous execution. Gradle 5.0’s new Configuration Avoidance APIs allow users to configure projects together. The task timeout API helps to specify a timeout duration for a task, after which it will be interrupted. Custom CLI args in Gradle 5.0 helps the users to configure their custom tasks. To know more about Gradle 5.0. check out Gradle’s official blog. Read Next Gradle 4.9 released! Android Studio 3.2 Beta 5 out, with updated Protobuf Gradle plugin Setting Gradle properties to build a project [Tutorial]