Electromagnetic compatibility vehicle safety related with it

　　In the rapid development of automobile industry and car market under intense competition, contributed greatly to the various electrical, electronic and information equipment widely used in automotive, for today's auto industry, the degree of applied electronic technology has become one of the important symbol of improving car technology. With the increasing number and variety of Automotive electrical equipment, frequency of continuous improvement, the increasingly complex electromagnetic environment in the car, car electronic equipment and devices, especially semiconductor logic devices are sensitive to electromagnetic interference, mutual interference of electronic equipment often the car interior. When electromagnetic interference occurred, ranging from lead to downgrades in disturbed function of sensitive electronic equipment, leading to its failure, serious implications for the safe driving of the car.

　　The development of automotive electronics industry

　　For nearly 5 years, China's auto electronic industry to maintain a high growth rate, by 2010, the industry break through the 200 billion. All this thanks to the prosperity of China's auto industry as a whole. Consumer demand for automotive safety, comfort and entertainment to improve domestic advances in electronic information technology, many internationally renowned automotive manufacturers also put a lot of effort to develop the Chinese market. Future car electronic Hou market also will quickly development, national car electronic manufacturers to caught this a development opportunities, implementation brand strategy; intelligent of, and digital and bus of is products development direction; security, and energy-saving, and comfortable and entertainment is future car electronic application of theme; car electronic technology and aviation, and railway electronic technology will further interactive; levels Government will increased on car electronic industry chain of support efforts, promoted has new energy car development, car countryside policy will further implementation.

　

　　EMC problems of automotive electronics

　　With auto electronic products using the increase in the number, frequency, and power to make the car work environment filled with electromagnetic waves, electromagnetic interference problems will become increasingly prominent, ranging from affecting the normal operation of electronic products, heavy damage important components, resulting in vehicle accidents. Electromagnetic compatibility is seen not to feel, what it will cause vehicle impact?, for example.

　　Put the phone in front of a moving car dashboards, when the cell phone call, dual lamp suddenly lit up. This is because phone signal to electromagnetic waves form radiation interference headlights control system, caused double flash lamp switch exception; a sound mine ring, car of anti-theft system suddenly started, Haw ring, this is car anti-instant State interference capacity insufficient of performance; a car automatically driving of car, if by outside of interference, on May will runaway; owners since purchased a audio to modified has car within existing audio system Hou, whenever open double flash lamp Shi, modified Hou of speaker always issued has law of noise, this is because modified of audio system anti-interference capacity insufficient, Double Flash of electromagnetic radiation interference to refit in open sound; there are more serious disruption, a moving vehicle after the radio station, suddenly died, lost power; when in a moving vehicle passing by radar stations, air bags suddenly opened, these are the vehicle itself EMC problems caused by a lack of resistance to external electromagnetic radiation. Therefore, along with the automobile intelligent and networked in the future, electronic technology is used more and more in the vehicle, also faces more severe electromagnetic compatibility (EMC) the challenges and implications.

　　How to improve automotive electromagnetic compatibility technology

　　According to the life cycle of product development, complete automotive electromagnetic compatibility system can be summarized as → test → design → simulation reform 4 steps. Car good behavior from good system design of electromagnetic compatibility, electromagnetic compatibility problem for the earlier, more measures you can take to solve problems, and corresponding costs are also lower. Electromagnetic compatibility design of the car, first depending on vehicle safety, performance, functionality, target market and regulatory requirements proposed vehicle electromagnetic compatibility indicators, systems and components and, secondly, to develop electromagnetic compatibility control plan and test plan, and then also according to experience, systems and vehicle electrical architecture design level of claims.

　　OEMs choose EMC test verification of automotive electronics, balancing the electromagnetic compatibility of the vehicle and automotive electronics, function and improve vehicle safety; automotive electronics plant to fully understand the vehicle in advance the specific model of the electromagnetic compatibility requirements, and design and production of products with high compatibility. Vehicle and car electronics factory can be detected by third-party agencies, such as holding technical assistance testing automotive electromagnetic compatibility, reduce costs and risks. Facing the ailing Chinese stock market start ups

　　Shenzhen City game Sheng technology limited as domestic EMC technology of lead who, game Sheng technology service of industry involved communications, and computer/server, and medical, and military products, and car electronic, and appliances, and industrial control, and digital consumption, field, Professional provides products of EMC, and anti-mine, aspects of technology design, and problem rectification, and products certification, for Enterprise provides EMC technical advice, and internal training, and EMC test certification and enterprise development EMC design process construction, service.

　　EMC standards of China's independent brand car companies are not perfect, most refer to the standard car companies in Europe and America. The general trend is that as more and more electronic, automotive intelligence and networking, automotive EMC issues will be more and more, EMC requirements will become more comprehensive and more stringent.

Most online payment draft released free transfers or the end of an era

　　

    On July 31, the Central Bank official in the brush on the network screen, depth charges shook the Internet industry. The network paid for the non-banking institutions cover the operational management of the draft (hereinafter referred to as the draft Protocol) is a stone arouses thousand waves, because of its Internet payment security specifications are there exclamations as "history".

　　Many media reports have said that regulators "design" is proposed through the payment of quotas, scope of business, and a number of provisions, which aimed to steer the paying agent "to the Bank", to return to "micro-payments" and "passage" in nature. Media visited a number of Internet payment company, Notes user account validation, balances, limits, and many other controversial articles, and even practitioners called "play".

　　Online payments giants, PayPal and Tencent have responded. Alipay official said, represented by third party payment of Internet banking, is in the Central Bank and the supervision departments at all levels of attention and support in the development. A healthy development of the industry needs regulation, and constantly open and progressive and forward-looking supervision, promoting the healthy development of the industry. Tencent group Internet financial public relations Center said Tencent's business team and recently the Central Bank maintain close communication, formal management approach was built to make suggestions, to innovate, improve convenience, jointly promote the payments industry.

　　One-day limit as "Bull's eye"

　　"Too few can pay 5000 Yuan in a single day, can't even buy a high-end electronic products the online", "have a transaction limit, I no longer have to ' chop '" ... ... The network, on the payment referred to in the draft limit finger refers to the bull's eye.

　　It is reported that the draft of comprehensive classes, consumer payment account provides a total of 200,000 yuan and 100,000 yuan respectively limits, payment instructions for different levels of security authentication mode is set to one-day payment of not more than 5000, 1000 limit.

　　China paid liquidation Association related head public response Shi stressed, above restrictive provides only applies Yu consumers paid account within of funds buckle paragraph, on those using shortcut paid and gateway paid of consumers basic no effect, and said very small beyond above annual and one-day payment limit of customer, can select paid institutions provides of jump Bank gateway or shortcut paid way, with I of bank card (bank account) completed foreign payment.

　　However, the Internet industry has always provided the user experience, mobile payment has become a trend, and cumbersome payment process is still a target. According to ping an Bank data provided by the research team in 2014, third party online payment 8 trillion yuan, an increase of 50%, mobile pay 6 trillion, an increase of 390% increase considerably more than online payments. Home Airbnb s ambitions in China crisis and killer

　　"Although central banks discussed the gateway on the PC side payment processes instead of barely viable, but third-party mobile payment potential rival with the Internet and the so-called gateway + electronic certificates of payment, no limit, mobile application currently does not have any. "Such team said.

　　But for banks to limit policy, there are insiders believe makes sense. "The objective of the draft to help protect the safety of customers funds because of funds recorded in account balance represents the equivalent of ' advance ' is not protected by the deposit insurance regulations. "IResearch analyst Li Chao explained that" in recent years, third-party payment account settling incidents of theft, misappropriation of funds. The draft for the third-party payment limit, avoiding risks to a certain extent. "

　　Analysys think-tank, Ma Tao, senior analyst, in a media interview said: "last year, the Central Bank also introduced the draft, more strict than this year's, provides daily payment amount is 1000 Yuan last year. Now the third party payment institutions are in and Bank of communications, the future will relax the unknown. "YeePay CEO analysis on Tang bin told reporters, the Central Bank may be combined with the mass reflects, raise the limit.

Website false information overload tortured profession regulation

　　Classifieds site on the Web to people in housing, employment, online shopping convenience also brings a lot of trouble in recent years relied on classified information website of swindling cases one after another. Shenzhen Municipal Public Security Bureau's anti-fraud Center recently to Baidu, 58 city and go to report the fraud involved in telephone, list of accounts of fraud, chaos in the fraud and company information for interviews, asking the above site through technical means rigorous user auditing, actively deleting information related to fraud, shielded, reducing the occurrence of such cases. August 19 Baidu and 58 fraud with anti-to the Shenzhen City Public Security Bureau information centres undertaking commitment active deletion, masking in order to reduce the false or fraudulent information. False information flooding except outside the site itself, lack of supervision is an important factor.

　　Classified site into the hardest-hit areas

　　In the era of networks of consumption become new growth points, personal trading stolen information, commodity quality worrying become obstacles to the healthy development of the online shopping industry. Recently, anti-fraud Center of information frequently received calls around, said most victims were deceived by false information on the classifications Web site, which includes online rental, charge d ' affaires credit card, hire, buy tickets online, online purchase of second-hand housing, while 58, net of false information in the same city the hardest hit. It is understood that the 58 City Web site for businesses to provide paid promotional services, click on the site the upper right "I want to promote" link, you can enter the service page, merchants can sign up payment methods to purchase advertising services. Registrants can be issued through the purchase of VIP services such as free advertising, which some unscrupulous businessmen "confused" consumers to create conditions.

　　Many consumers in the first half of this year reflects, at 58 city to see it's "homemade assembled Apple 5S, 6, 6plus cod", "Apple's latest renovation at wholesale prices shipped five", "wholesale and retail of refurbished Apple 5S" information, such as purchase and found quality problems and ask for a refund return businesses could not be reached, suspected by fraud. On July 15, Xie "58 city" saw on one of the houses. According to the website's phone, she contacted "landlord" and add the other app, other then property photos, Xie did not want to believe in each other, and Convention-2000 RMB/month rent and "charges a three." On July 31, Xie asked hui to 500 Yuan, "down payment" on August 1 and remit the rent 3500. Subsequently, the "landlord" an excuse to travel, so "friends" continues to Miss Xie handled, and asked to transfer. Xie now see through scams and alerts.

　　Statistics show that the false fraud information is increasing. In Shenzhen, for example, first half of 2015, Shenzhen Consumer Council received 64 complaints about 58 city NET, compared with 46 in the same period last year, an increase of nearly 40%.

　　Police interviewed Baidu 58 city

　　August 19, Baidu, 58, two sites in the same city officials submitted written replies to the Shenzhen City Public Security Bureau, said deleted, blocked access to police information relating to false, fraudulent and launched their company for false or fraudulent information measures, while promising to reduce false, fraudulent information from the site itself. Virtual technology war and games blurring

　　Baidu public relations person in southern China DONG, Yi fees to promote user's information is true safety is also given a positive response and promised to cooperate with authorities clearing illegal information according to law, and purifying the network environment. Guarantee scheme was launched and the majority of users, user clicks login Baidu account protection scheme within the site, such as transaction fraud, suffered direct economic losses, according to Baidu's protection of Internet users ' rights protection services agreement. There is suspicion of fraud for promotion information, Baidu will audit and investigate further, once verified permanent closure account. The official also indicated that Baidu is not a law enforcement agency, but will cooperate with law enforcement authorities to deal with, may appear in the audit process audit of forged legal procedures or a later phenomenon, Baidu cannot be eliminated, only afterwards to accountability. And reminded the majority of Internet users in the Baidu search engine as far as possible from the official Web site for shopping.

　　Subsequently, 58 city public relations director Song Xiaoxi said that since receiving the Shenzhen Public Security Bureau Internet police detachment on strengthening integration of false fraud information clearing after informed of the letter will increase the intensity of the discovery of false information, processing. A case study of Shenzhen, July to remove false information of more than 320,000, has been significantly reduced user complaints.

　　Police warned that information posted should be carefully screened, especially with the market price differences more rapid remittance not freeloaders, try to verify in person, face-to-face transactions. Find false information can be reported to the site. According to the Supreme People's Court and the Supreme People's Procuratorate on handling criminal fraud explanations on several issues concerning the specific application of law seventh: knowing that others to commit fraud, to provide credit cards, phone cards, communication tools, communication channels and network technical support, costs, help, be punished as common crime. Anyone who has found this type of situation, you can call 110 or call the local municipal Public Security Bureau information about anti-fraud information hotline for counseling.

　　It is reported that throughout the investigation after receiving complaints have been carried out by the Consumer Council, and has interviewed 58 officials of city NET, demanding 58 city to explain the numerous consumer complaints, and practical solutions. 58 city to explain light cottage has been organized in a second-hand goods operations team based on data and behavioral model for full-cycle risk control, follow-up will be fully self audit information, improve customer qualification and monitoring complaint feedback. Shenzhen Consumer Council said information platform has the responsibility or compensation. Under the new consumer protection law, Internet transaction management and other relevant laws and regulations, a platform for online shopping (or providing related services) dispute shall bear corresponding responsibility. Article 44th of the consumer protection act as third party network trading platform provider, one is unable to provide sellers or service providers of real names, address and valid contact cases, assume liability for damages. Second, knows or should know sellers or services use platform compromise consumer rights cases, has failed to take the necessary measures, joint and several liability. Provides that the online trading platform to make more commitment in favour of consumers, should honour their commitments to prevent commitments not honoured.

　　The network transaction management measures article 23rd, platform operators should apply to third-party transactions sold commodities or provide services of legal persons, other economic organization or individual business subject for review and registration did not have industrial and commercial registration should be sold based on criteria for registration, the application product or information about the true identity of natural persons to supply services for review and registration.

　　Lax auditing fraud vulnerability

　　In fact, the classifications Web site as an information-sharing platform, have the obligation to review the content on the site, but in the face of huge amounts of data, Web sites also seem to be some "powerless". Therefore, Classifieds site has also become a false information, wrongful trading behaviors, such as fertile soil.

　　In General, the user after posting, Classifieds site will be judged by their intelligence information if there is a problem, this anti-spam system on illegal or obscene, fraudulent information to identify and filter. And Classifieds site posts are manual check, manually identifying ways to further serious investigation into the authenticity of published information. Post line, information at the front desk of the audit team will also check the Web site timely docking and user complaints, reporting, general user complaint postings, Web site audits, processing rates. But in fact, Classifieds site verification limited to post true information, user complaints about false information Web service only "pass the buck".

　　Reporters call 58 official customer service center in the same city, said "because of daily amount is too big, can't verify, the system could not master the authenticity and accuracy of published information. "Asked 58 city deceived users by providing false information to respond, while the other side says it will record complaints and report, but cannot make a concrete response, recommended that gullible user alarm, is handled by the police. Reporter to deceived users and called the 58 city information hotline, staff records taken in fact, it is recommended that users purchase on a 58 city with the Web-o-pass logo products. "If we really cheated, may apply under the premise of evidence 58 city pay, but the pay range is less clear. We will be on site to verify the information, but now crooks means high, we will also be cheated. For the liar's punishment is not in our scope of work, cheated by other specialists. "58 illegal information hotline, said in the same city.

　　Reporters found that Classifieds site, publishing false information, "vinegar and selling dog meat," a lot of advertising, recruitment, ticketing features such as bar plate is false advertising. A Yoga Studio in Guangzhou in 58 city "ticket" column published "1 transferred a health card" message, but when reporters call asking the other side said it "made a mistake" and seize the opportunity to introduce a lot of the information, in fact, is advertising. Go to the "performing in the same city and exhibition" in addition to a large number of outdated information in the InfoBar, is named "show", it is for the ad content. Consumers go to buy used motorcycles, Mr LAU, but didn't get, being fooled off 1100 Yuan.

　　"The information published by users, Web sites can't verify, advised consumers to police to recover their losses, consumers suffered only" deep regret. " "Net said.

　　Authenticity to improve user experience

　　China's Cao Lei, Director of electronic commerce Research Center believes that Taobao Classifieds site is similar to information, individuals can free online job seekers, for rent, second-hand goods and other information. "These sites do give rise to a convenient, daily life such as getting a job, renting, buying and selling second hand service, can be solved, but the complex emotions also brought difficulties to the management of information, classifying information false and fraudulent site has been criticized by industry. "It is understood that at present, the Classifieds site is one of the main sources of profit businesses registered member certification account authentication account to publish false information makes it even more easily fooled.

　　Because of lax supervision on false fraud information, can lead to a poor user experience, and lose trust in the site, 58 city and go to the sharp decline in traffic is an illustration. Now go and 58 city ALEX traffic rank outside the domestic site 500, August 14 58 ALEX traffic rank 664 in the same city, go to the ALEX traffic rank 572, literally to "decline".

　　"The revenue model is the classification of information industry of war. "Cao Lei said. Domestic Classifieds site revenue sources are almost always focused on advertising revenue and member contributions, and facing the high cost of advertising and Web site promotion, these are "inadequate". Relying too much on Member registration revenue, will result in the website cannot take into account the user's experience, a huge amount of information and disinformation fill the entire site, which leads the traffic decline, eventually creating a vicious circle.

　　An information website is the core on which the user's attitude and reputation. Therefore, enterprises should be thinking about how to improve the quality of platforms, merchant quality, quality user, content quality, and increase their profit but not to improve the flow. Classifieds Web sites, how to flow in a rapid expansion into profits is no small challenge. But condoned any flood of false information, the fact that users were tricked into soft, will affect the user experience, it is a "treadmill".

Cheap 3D printing drones entered the Navy bad throws a

　　

 

　　Lei feng's network news, yesterday, United Kingdom Royal Navy HMS Mersey was tested on the South coast of England, the drone of a low cost 3D printing.

　　This Jet moulding UAV weighing about 3 kilograms, used a three-meter-long catapult launch, and then following the pre-programmed flight routes to five minutes after landing at a beach full of pebbles.

　　Worth noting is the main structural parts of the drone is made using 3D printing on shore, then completed the installation on board the ship. The aim of the experiment is to test, when necessary, a one-time cheap drones had great military value, and allows the crew to quickly perform a new task.

　　United Kingdom maritime warfare Centre drone Director Geoff Hayward, said in a military sense, using factory mass production of unmanned aerial vehicle flexibility is not high enough, and specialize in custom costs are too high. Cheap dedicated drones prepared using 3D printing technology to meet military needs.

　　Before the test, on wind resistance and stability of the drones are not known. From 3D printing company in cooperation with the military say they have begun looking for ways to bring relevant technology to civilian.

　　

 

　　Sulsa drone camera captured images

　　This drone (called Sulsa), a wingspan of 1.5 meters, propeller-driven, design was developed by the University of Southampton. Four main parts of the drone produced by a 3D printer, use laser powder fusion together when assembled. Worth noting is that this hinged control surfaces in the UAV components, such as rudder and ailerons, are made of is using 3D printing. Of course, the electronic parts are prepared in advance. After the completion of the drones can be attached with sensors and radar, and can even install a bomb. Its flight speed can reach 160-kilometer per hour.

　　In fact, the drones used in the Navy there are precedents, but the drones because prices are expensive and difficult to carry out large-scale application.

　　According to the researchers, the cost of manufacturing a Sulsa only thousands of dollars, and former private military unmanned aerial vehicle compared to the multibillion-dollar cost advantage is obvious. But enough in life to force--only range of 40 minutes, this time in terms of tracking pirates is not enough. But since it's so cheap, and lost again to send another would be nice. Do you think iPadPro enough to break Surface

　　Researchers envision military can carry some custom components, 3D printer, raw materials, and a variety of sensors on the sea missions in time of need, you only need to select appropriate combinations based on conditions. Print a complete Sulsa part needs a few hours of time, tasks that require rapid response, might not be so practical.

 

Being black so what Cheating website says that the number of users is still

　　Since the website Ashley Madison cheating (Ashley Madison) since the website was attacked by hackers, has in the past nearly two weeks of time. About two weeks ago, Ashley Madison website suffered a hacker attack, resulting in theft of account information for the site more than 30 million users, including private members ' names, e-mail addresses, and detailed the sexual orientation of specific information is available to the public. Google returned to China was Wolf or a Wolf

　　However, despite the Ashley Madison site suffered extensive media criticism of negative information, and Chief Executive of nuoyier·bideman (Noel Biderman) was forced to resign, but the Ashley Madison website still claims that user base is still buoyant.

　　According to the Ashley Madison website recently released a statement saying that "in the last week alone, there are still hundreds of thousands of new users register the Ashley Madison platform, including 87,596 female users. "

　　Media had previously reported that extramarital affairs website mainly male users. Gizmodo's editor in Chief annali·niuweici (Annalee Newitz) users of the Ashley Madison website gender analysis claimed that 30 million accounts were hacked in the account only about 5 million are women. Niuweici also found that the accounts of these women, among the most likely to have been tried, but also by the Ashley Madison website, staff set up fake accounts.

　　Ashley Madison Web site in response to user statistics related to the number of problems, said niuweici some problems with the data. Ashley Madison says weekly on the site from female users to send messages more than 2 million.

　　Ashley-Madison also claimed that the media was biased by attack of the black event. Meanwhile, Ashley Madison website requires users of its service to keep an open mind.

　　Ashley Madison Web site parent company Avid Life Media said in a statement, "some of the media reporters and complete the Ashley Madison Web site was hacked as a focus, attacked us, rather than attacking the hackers. Ashley Madison cheating site for those seeking services live to provide the best service. We want everyone to visit our website or use our application, then forming their own opinions. "

Google new logo cleaner for mobile devices

　　By comparison, Google new logo color logo color to be much softer than in the past. New logo is more representative of the new parent company Google Alphabet logo. Alphabet word mark also has similar appearance without any decoration. Google's updated logo was designed by the two companies between the internal links have been further strengthened.

　　So, why Google decided to replace the new logo?, Google claims that new logo to reflect "this fact and display the charm of Google to work for users, even in the tiniest of screens. "Google new logo is more simple, the size will also become smaller, but the design has to be able to make the sign more unique, and make it easier for users to read. In addition, it can also let Google more easily shown in low bandwidth network connections. Google claims that the company has designed a version only "350 bytes" logo, and the existing logo is 14000 bytes. With Google's new Chief Executive, sangde·Picha (Sundar Pichai) one of the ambitious goals is "the Internet--of course – extended to Google and Google is still not covered in other areas of the world", so Google this updated logo is a little adjustment, but it will certainly be an important adjustment. 6 Internet community investment failure cases

　　

　　In addition, users can also see the new Google logo "g" began to appear in Google's services. Most notably Google+, currently using a non-color version of the new letter "g".

　　So, why is Google doing this kind of change? Google hope the new logo for the launch of a new Visual language, this user is not just about using Google, but also show how Google customer service.

　　This is not the first time Google replace the logo, of course, won't be the last, but Google believes that today's update is well reflected the company is through the search, maps, Gmail, and Chrome and other products to provide users with services in different ways.

Desktop with Baidu in hand of the embarrassing in Hong Kong play the Baidu World

This year in March, the famous actor, Director, Xu Zheng does with jeans dress, matching screen and the big screen incarnation PPT "Xu Busi", for the film after the embarrassing global document Conference in Hong Kong, recently rumored Xu Zheng does will once again embrace the Internet, or will debut on September 8, Baidu World Conference, Baidu, Baidu's product desktop publishing power.

"Figure 1" embarrassing press conference in Hong Kong on "weimixiu" 6 Internet community investment failure cases

Small learned that Baidu World Conference invited to Xu Zheng does in addition, Enlight Vice President Liu Tong will also appear on the scene, Baidu with the desktop to a "net" operations. What are the plans for future cooperation on both sides, there are no more messages.

Baidu said the desktop, desktop Baidu as a leading desktop portal software, which has teamed up with the embarrassing in Hong Kong, not only because the two sides recognized each other's status and influence within the circle, is on the basis of "Internet + movies" variant of the common understanding.

The embarrassing promotion of Hong Kong as an example, Xu Zheng does a series of play expressed his "Internet + movies" understanding, such as the March Global Conference, Xu Zheng does act young lady shows first episode spoilers, recent "embarrassing lingerie in Hong Kong" weimixiu, has passed something every homeowner can relate to Internet users and Internet to promote insight into play. In this regard, Baidu as a location to the desktop "desktop PC access" of a product, is designed to connect users and services. In the desktop search movie title, you can step through video playback interface or the booking interface, eliminating the need for traditional "open a browser, open the Baidu page, search and then select the relevant pages" the cumbersome steps, desktop product Baidu official told reporters, it is both sides of the "user-centric" cognition and philosophy, contributed to the partnership.

It is learnt that the Baidu World Conference will be "3600 indexes the real world connections" as its theme. From the products of its desktop Baidu and embarrassing film Hong Kong, the event of cross-border cooperation, this theme is also using the product personally. Small series found that Baidu desktop version 1.9 released some time ago, will provide direct access to news, stocks, Twitter, micro-credit, pastes and many other services, while the desktop Baidu "electric shock", what would be the fusion reaction, believes there will be more worthy of attention.