Categories: KUSI, Local San Diego News, Sports FacebookTwitter October 26, 2018 Updated: 1:18 PM Jonathan Halvorson, Jonathan Halvorson ENCINITAS (KUSI) – The 7th Annual Exposure Skateboard competition is being held Encinitas on November 3rd & 4th.The competition raises money for victims of domestic violence.More than 150 skaters from around the world will be competing for a $50,000 prize.“It’s an amazing event that helps boost women’s skateboarding,” said Jordyn Barratt, who has competed in Exposure since 2013. Barratt made her pro debut in 2016 and placed 1st in both Pro Bowl last year.The free event runs from 9 a.m. until 5 p.m. Saturday and Sunday.For more information visit www.exposureskate.org. Posted: October 26, 2018 Exposure Skateboard Competition in Encinitas
Police departments from the cities of El Mirage, Peoria and Surprise will be able to continue practicing emergency vehicle driving skills at Luke AFB, Ariz., in conjunction with the 56th Security Forces Squadron, under a memorandum of understanding that representatives signed Wednesday. Before training began at Luke, the three police departments struggled to find an adequate location for proper training procedures, reports 56th Fighter Wing Public Affairs. The local departments provide the vehicles and instructors, which benefits Luke.“This is a big agreement for West Valley agencies,” said Terry Young, Surprise Police Department police chief. “Every year in public safety, we see an increase for the needs of training, and it can be difficult to balance resources with requirements. Luke is a perfect example of the strength we have with our state and federal partners not just in the valley, but the state of Arizona.”Photo by U.S. Air Force Airman 1st Class Caleb Worpel Dan Cohen AUTHOR
WILMINGTON, MA — The Wilmington High School hosted its bi-annual Culture Festival on Thursday, March 17, 2019. Students displayed food, facts, costumes and other wonderful things from other countries they learned about. The evening also featured cultural dance and musical performances from students.Watch the highlights, courtesy of Wilmington Community Television, below:——Like Wilmington Apple on Facebook. Follow Wilmington Apple on Twitter. Follow Wilmington Apple on Instagram. Subscribe to Wilmington Apple’s daily email newsletter HERE. Got a comment, question, photo, press release, or news tip? Email email@example.com. Share this:TwitterFacebookLike this:Like Loading… RelatedVIDEO: Watch 2019 Wilmington Spring Band FestivalIn “Videos”News & Notes From WCTV: Wildcat TV After School Club Starting At Wilmington High SchoolIn “Community”VIDEO: Watch ‘The Back Track Band’ Perform A Concert On The CommonIn “Videos”
In what could be a decisive blow to Australia’s chances of regaining the Ashes, their prolific run-scorer Steve Smith has been ruled out of the third Test of the five-match Ashes series beginning on Thursday, August 22. The injury suffered by Smith was due to a bouncer bowled by England’s debutante Jofra Archer in the Lord’s Test.This bouncer, delivered on the third day of the Test when Smith was batting on 80, hit the right-handed batsman on the neck and led to him retiring hurt. The former Aussie captain was able to come back out later and resume his innings, eventually being dismissed by Chris Woakes on the personal score of 92.It was on the fourth day that the 30-year old suffered a delayed concussion and was declared unfit to take part in the rest of the match. In his absence, the new rule stipulating that teams can bring in a full substitute in case of a concussion suffered by one of their players, was put into effect for the first time and Marnus Labuschagne was brought into the XI.The reason why Smith’s absence could prove to be the turning point is because he has been in outrageously good form, having had scores of 142, 144 and 92 in the three innings he has played so far in the series. In his absence, the Australian batting line-up will look much weaker.
Gunfight IllustrationTwo men were killed in a reported gunfight with police in Moulvibazar of Teknaf upazila’s Hneela union in Cox’s Bazar early Sunday, reports news agency UNB.Deceased Mahamudur Rahman, 28, son of a certain Miah Hossain, resident of Ali Akbar Para, and Mohammad Ashraf, 25, son of a certain Nurul Islam, a resident of Noyapara of the upazila were drug traders, claimed the law enforcement.Six LGs, bullets and 10,000 yaba pills were also recovered from the spot, said Pradip Kumar Das, the officer-in-charge of Teknaf police station.He said that their team conducted a drive in the area after being tipped off about the presence of a drug traders’ gang.“They opened fire as soon as the police team reached the site, triggering a gunfight,” the OC said. “We recovered bodies of two drug traders after the gunfight.”Prothom Alo, however, could not verify police version of the incident independently as no version was available immediately either from any witness or from any member of the victim’s family.According to the human rights organisation, Ain o Salish Kendra (ASK), a total of 421 people were killed in alleged gunfights, crossfires or shootouts with the law enforcement agencies in 2018.In January and February of 2019, the number of such killing was 50, the rights body said on its website.
This image shows the cochlea of a rabbit, which is very similar to that of most mammals, including humans. The three rows of outer hair cells could act like electrodes on a SAW resonator. Image Credit: Andrew Bell (originally from Counter, et al.). 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. Using squirting waves and the SAW configuration, the cochlea could theoretically provide sharp resonance frequencies typical of the human ear, in the range of 20 to 20,000 Hz.“The idea is that cells are not lonely, independent entities unaware of other cells,” said Bell. “Instead, cells appear in populations and cooperatively interact so as to perform signal processing. We have long known that nerve cells process information via a network of interactions (neural nets), but here we see a preneural example: outer hair cells act both to detect sound and pass it on to neighboring cells, which do the same. Shuttling of signals back and forth leads to positive feedback and frequency analysis, and this might prompt us to look for similar interactions among other sensing cells. Visual, olfactory, and balance cells, for example, could well work in similar ways.”Bell speculates that the main reason past artificial cochleas fell short is that their designers focused on the passive traveling wave picture. But building a cochlea based on the active processes residing in the resonator analogy may, Bell thinks, open up a much more effective way forward.“A SAW-like cochlea would form a rugged spectral analyzer—a reasoning behind existing artificial cochleas—but it could be much more sensitive then existing prototypes,” said Bell.Bell explained that more experiments and testing will determine if this idea is accurate. He also added that there may be some exciting characteristics of the ear to discover.“Future research needs to be directed to validating the SAW resonator model,” he said. “But then there are finer features which call for explanation, too. What is the purpose of the ‘V’ shape of the stereocilia, for example? There is reason to think it could relate to detecting musical ratios in sounds, and if so this would give a marvelous physical underpinning to our remarkable musical sense. The cochlea may be highly tuned—and musical.”Citation: Bell, Andrew. “Sensors, motors, and tuning in the cochlea: interacting cells could form a surface acoustic wave resonator.” Bioinspiration and Biomimetics 1 (2006) 96-101.By Lisa Zyga, Copyright 2006 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com. A SAW resonator (top) has two sets of electrodes that generate and detect electromechanical ripples. With a similar structure, the cochlea (bottom) could use outer hair cells to sense and create standing waves. Image Credit: Andrew Bell. In developing his new idea, Bell was inspired by a discovery in 1978 that most human ears continuously emit very pure, soft tones—sounds which can be picked up with a sensitive microphone. The current theory of a hydrodynamical traveling wave stimulating hair cell stereocilia does not easily accommodate such fine tuning, leading Bell to propose that the outer hair cells in the cochlea actively cooperate to amplify sound. “When you listen to a recording of the sound that the cochlea makes, you hear something like a carillon of wind chimes,” Bell told PhysOrg.com. “It’s easy to get the impression that something seems to be resonating.”He considered a design where the cochlea would function like a SAW resonator, a device in solid-state electronics commonly used in cell phones due to its small size. SAW resonators use rows of electrodes to process signals by creating electromechanical waves between them whose wavelengths correspond to the spacing of the electrodes. Bell noted a striking characteristic of the outer hair cells: they always lie in three well-defined rows, much like the electrodes on a SAW resonator. Bell thinks that the waves align with the rows of hair cells, with the first and third rows being in antiphase with the middle row. Such SAW-like behavior would also correspond well with results from past experiments in auditory science.Further, like a SAW resonator, the cochlear amplifier would operate in a feedback circuit mediated by the waves. Because the hair cells are linked to soft structures such as the gelatinous tectorial membrane, feedback in the cochlea would require a slow-moving wave, one with a very short wavelength. Recently, a prime candidate for such a wave has been identified: called “squirting waves,” these waves arise in fluids constrained in ways similar to those found in the cochlea. In attempting to construct an artificial cochlea—and faced with limited knowledge of how the living chamber works—scientists might need to look no further than a simple electronic device: a surface acoustic wave (SAW) resonator. Recently, scientist Andrew Bell suggested that the cochlea exhibits similar structure and electromechanical properties to this common piece of circuitry. Citation: Analogy of cochlea as resonator could lead to artificial copies (2007, January 9) retrieved 18 August 2019 from https://phys.org/news/2007-01-analogy-cochlea-resonator-artificial.html The cochlea—a spiral-shaped, hollow bone in the inner ear—plays a vital role in sensing, processing, and amplifying sounds. The common understanding of the workings of the cochlea centers on its passive behavior, in which tiny hair cells create electrical signals from vibrations in the surrounding fluid.
If you hadn’t noticed, gamers are taking to the streets, to businesses and even oceans to catch creatures called Pokémon in what’s become the first hit augmented reality game — Nintendo’s Pokémon Go.In this massive virtual scavenger hunt, users’ mobile devices vibrate when they come close to Pokémon dragons, rats and more. Players then throw a Pokéball at a virtual creature to ‘catch it.’ The goal is to catch all 150.Related: Pokemon Game Adds $7.5 Billion to Nintendo Market Value in Two DaysUsers can also “lure” Pokémon to PokéStops in towns nationwide, for 30 minutes — making the Pokémon available to all gamers in the area. Players will also look for “gyms,” which is where people take their Pokémon to battle.Pokémon Go has already made Nintendo $7.5 billion in just a few days after its release July 6, and more people are using the app than Instagram and Snapchat.Nintendo isn’t the only company making money off of the game though. For some local businesses, this game is attracting Pokémon-crazed customers — and their money. Want to capitalize on the excitement? Download the app and get ready to get creative. Meanwhile, here are some of the strategies small businesses have already put into place.Join the gameJoyride Nashville — a Tennessee service that takes people on tours through the city — created a special Pokémon Go Tour once it noticed more customers asking to be taken to specific landmarks to catch Pokémon along the way. The company says it booked seven tours in 24 hours, bringing in $45 a person.Welcome playersUtah clothing shop iconoCLAD discovered its location was actually a Pokéstop. It moved quickly, posting a sign outside the shop saying “Gotta catch ‘em all, in style,” and shared photos of the sign on social media. The simple whiteboard sign has already been featured on Forbes and Money.If you find your location is a Pokéstop, you can go one step further. Download the app and screenshot pictures of the Pokémon in your store, showing players which characters they can find there. Later, encourage players to post their own photos — and tag your store.Related: How Cemeteries, Police and the Holocaust Museum are Coping with PokeMon GoGive players a boost Huge, an ad agency owned by IPG in Atlanta, is using a coffee shop to experiment with the Pokémon Go craze as a marketing platform. The coffeehouse is located between two Pokéstops. As the game “lures” Pokémon to the stops — in turn, lures Pokémon Go players to the cafe. Since the game’s use of GPS drains batteries quickly, the shop is conveniently providing 25 phone charging stations and a free steamed bun appetizer for customers who catch a Pokémon inside its store.Related: 8 Weird Reasons Pokémon Go Isn’t the Game Craze We’re Used ToCast your own lureL’inizio, a pizza bar in New York. Spent a mere $10 on lure modules in the location, according to the New York Post. That following weekend, sales rose 75 percent.Want to do this yourself? Once you have downloaded the app, you can determine the nearest Pokéstops to your business. Once you know where they are, you can lure more players to the location by using the lure module, which makes Pokémon abundant in that area for 30 minutes. Each lure costs $1.Have you caught the fever yet? Share your own stories with us on social media. July 13, 2016 Register Now » Opinions expressed by Entrepreneur contributors are their own. Free Webinar | Sept 5: Tips and Tools for Making Progress Toward Important Goals Attend this free webinar and learn how you can maximize efficiency while getting the most critical things done right. 4 min read
A team of researchers, namely, Ismail Akrout, Amal Feriani, and Mohamed Akrout, published a paper, titled ‘Hacking Google reCAPTCHA v3 using Reinforcement Learning’, last month. In the paper, researchers present a Reinforcement Learning (RL) method that can easily bypass Google reCAPTCHA v3. Google’s reCAPTCHA system is used for detection of bots from humans and is the most used defense mechanism. It’s used to protect the sites from automated agents and bots, attacks and spams. Google’s reCAPTCHA v3 makes use of machine learning to return a risk assessment score between 0.0 and 1.0. This score is used to characterize the trustability of the user. If a score is close to 1.0 then that means the user is human, if not, then it’s a bot. Method Used The problem has been formulated as a grid world in which the agents can learn the movement of the mouse and click on the reCAPTCHA button to receive a high score. The performance of the agent is studied on varying the cell size of the world. The paper shows that the performance drops when the agent takes big steps toward the goal. Finally, a divide and conquer strategy is used to defeat the reCAPTCHA system for any grid resolution. Researchers have produced a plausible formalization of the problem as a Markov Decision Process (MDP) that can be solved using advanced RL algorithms. Then, a new environment is introduced that simulates the user experience with websites that have reCAPTCHA system enabled. Finally, it is analyzed how RL agents learn or fail to defeat Google reCAPTCHA. In order to pass the reCAPTCHA test, a human user is required to move the mouse starting from an initial position then perform a sequence of steps until the user reaches the reCAPTCHA check-box and clicks on it. Based on how the interaction goes, the reCAPTCHA system rewards the user with a score. As shown in the figure, the point where the mouse is the starting point and goal is the position of reCAPTCHA. A grid is constructed where all the pixels between these two points is a possible position for the mouse. It is assumed in the paper that a normal user will not necessarily move the mouse pixel by pixel, hence, cell size is defined that refers to the number of pixels between these two consecutive positions. Agent’s mouse movement After this, a browser page will be opened at each episode with the user mouse at a random position. The agent then takes in a sequence of actions until it reaches the reCAPTCHA or the time limit. Once the episode is complete, the user will receive a feedback of the reCAPTCHA algorithm as any normal human user would. Results Researchers trained a Reinforce agent on a grid world of a specific size. The results presented in the paper are success rates across different 1000 runs. For the experiment to be successful, the agent would have to defeat the reCAPTCHA and obtain a score of 0.9. As per the results of the experiment, the discount factor achieved was 0.99, thereby, successfully defeating the reCAPTCHA. “Our proposed method achieves a success rate of 97.4% on a 100 × 100 grid and 96.7% on a 1000 × 1000 screen resolution”, states the researchers. For more information, check out the official research paper. Read Next Google researchers propose building service robots with reinforcement learning to help people with mobility impairment Facebook researchers show random methods without any training can outperform modern sentence embeddings models for sentence classification Researchers release unCaptcha2, a tool that uses Google’s speech-to-text API to bypass the reCAPTCHA audio challenge