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Guide to Buy College Football in Digah House Company

Guide to Buy College Football in Digah House Company

2021-11-13
Digah Company
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On this page, you can find quality content focused on college football. You can also get the latest products and articles that are related to college football for free. If you have any questions or want to get more information on college football, please feel free to contact us.

college football sells very fast in the domestic and oversea market. Guangzhou House Empire Construction&Furnishing Co.,Ltd is proud of developing it. Our designers are extremely innovative and have a keen sense in this field, thus they make the product be the pioneer for its appearance. From design, manufacturing, to finished products, we perform each process in accordance with the international standard. The quality of the product is entirely guaranteed.Digah Company products enjoy high popularity in the market now. Noted for their high performance and favorable price, the products have received mountains of great feedback from customers. Most customers give their high praises, because they have gained greater benefits and established a better brand image in the market by purchasing our products. It also shows that our products enjoy a good market prospect.At Digah Company, we greatly improves customer experience relying on our long-term expertise and dedicated post-sales support. MOQ, warranty, shipment and packaging of college football are negotiable or subject to customers' requirements.
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Case #7 Poodle Dan Pug Yang Pup Berdarah Suspect Parvo (salah Diagnosa Lagi)
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Bikel & Loki instagram bikelloki . Kedua puppies ini mengalami pup berdarah, poodle telah dirawat dengan infus selama 6 hari karena divonis parvo. Tidak ada perubahan selama dirawat. Pemiliknya : Harly Valentina memutuskan untuk membawa pulang dan merawatnya sendiri menggunakan obat antiparasit dari saya.Kejadian salah diagnosa ini sering terjadi, test kit parvo ternyata memberikan hasil yang salah. Anjing cacingan selalu terdekteksi parvo oleh test kit tsb. Ciri ciri anjing cacingan memang sama persis seperti parvo seperti pup berdarah, demam dan muntah. Dari pengalaman selama menjadi breeder, parvo itu hanya bisa ditularkan melalui vaksin dan kontak dengan anjing lain yang terkena parvo. Tidak pernah ada kejadian anjing terkena parvo secara tiba tiba di kennel sy. Perbedaan tentang parvo dan cacingan bisa dilihat di link ini.Cerita tentang Bikel & Loki disharing oleh pemiliknya di history instagram yang sy rekam divideo di bawah iniUntuk mencegah agar anjing tidak mengalami pup berdarah mencret dan lainlain karena parasit dan cacing selalu gunakan obat athelmintics buatan Rio Farm. Obat cacing di pasaran tidak dapat membersihkan masalah parasit secara tuntas yang berakibat anjing bisa mengalami sakit pencernaan dan juga penyakit lainnya.Hub admin Rio Farm untuk info obat parasitLink whatsapp (klik)Telp : 082120141155Educate yourself be responsible ownerPembelian obat parasit lewat TOKOPEDIA klik disini
High Voltages Vs. Energy Loss
High Voltages Vs. Energy Loss
High voltages vs. Energy lossSummarised solution:Power loss in transmission of power over distance is mainly (but not wholly) by resistive losses.Resistive power loss = $I^2 cdot R$ (current squared x resistance).Power transferred in a circuit = Voltage x Current = V x ISo power lost as a proportion of power carried:$$ P_loss over P_carried = (I^2 cdot R_line) over (V cdot I) = I cdot R over V $$Note that this has units of Voltage/Voltage which cancel to give a dimensionless ratio (as you would hope). The "top line" Voltage is the I x R voltage drop in the line and the bottom line Voltage is the transmission voltage. So loss ratio is effectively resistive_voltage_drop / line_Voltage. So, for a given conductor of resistance R the percentage of power lost will increase as current increases and will decrease as voltage increases.But as Power carried = V x I, if we double V we halve I. If we multiply V x 10 we reduce I by 10. This is a win-win situation for high voltage. This can be put two ways.andA simple calculation shows that loss % decreases as the inverse SQUARE of Voltage . Increase voltage by 10 x and for the same line resistance losses will drop by a factor of 100. Murphy was asleep that day.The gains are so great that if this was the only factor then as high a voltage as possible would make sense.There are other factors such as losses due to corona and the need to provide substantially increased insulation and clearances and tower sizes as voltage foes up BUT economically, it all leads towards big tall ugly very high voltage towers.Simplistic example:1000 Watt power transfer. Rline = 1 ohm.(1) V= 100V, I = 10A. Power transmitted = 100 x 10 = 1000 W. Power loss = I^2 x R = 10^2 x 1 = 100 W. 100/1000 = 10%. 10% of power is lost.(2) V= 1000V, I = 1A. Power transmitted = 1000 x 1 = 1000 W. Power loss = I^2 x R = 1^2 x 1 = 1 W. 1/1000 = 0.1%. 0.1% of power is lost.(3) Increase line resistance to 10R = use 10% of original material. Still use 1000V. V= 1000V, I = 1A. Power transmitted = 1000 x 1 = 1000 W. Power loss = I^2 x R = 1^2 x 10 = 10 W. 10/1000 = 1%. 1% of power is lost. Even when the line uses 10% of the conductor material of the original circuit, an increase in voltage by 10x decreases power loss by a factor of 10 .The reduction in loss and/or material (copper and/or Aluminium conductor) is so vast that use of high voltage is obviously very desirable.There are other factors that make the gains less great in practice BUT the existence of large and larger power pylons demonstrates that reality is still well served by higher voltages.— — — — — —230 and 240 transformer leadsYou may have a transformer that was built for use during the time when Europe was standardizing the line voltage. Up until 1995, various countries in Europe used different line voltages for the outlets. For example, in Germany it was 220V, but in the UK it was 240V. In 1995 (Mains voltage wikipedia ), they all began switching to 230V ,and were supposed to have completed the switchover by 2008. So, you may have a transformer that was built to be installed into a device and used when the line voltage was 240V, but could then be switched (switch or jumper) to use the lower voltage after the changeover.Here in Germany in the early 1990's I used a big test rig for two way radios that had a switchable supply voltage - it was adjustable from like 210V up to 250V. I also own an oscilloscope that was built in 1967 that has a jumper on the back to switch between 110V and 220V - with various jumper positions for voltages from 220V up to 250V (or something like that I do not have it memorized.)— — — — — —having different voltages from 2 batteries in serie (3 voltages…)It's quite simple, you need 3 batteries - it's just a question of where ground is:simulate this circuit - Schematic created using CircuitLabBe warned though that CR2032 batteries can only supply very small currents
How Rare Is This Blu Ray Special Edition?
How Rare Is This Blu Ray Special Edition?
That relies upon. How considerable is photograph high quality to you? Blu-rays look and sound extra functional than DVDs, yet till you have a great hi-def abode theater set-up you will possibly no longer observe. you additionally can locate low fee Blu-ray discs on Amazon. (i've got lined a link at backside for Blu-rays that fee around $10. ).1. When is the twilight zone coming to blu ray?1. If the films are available, they can be scanned in HD. 2. Even if not, you can fit quite a few episodes of TV onto one BD-DVD.2. Will Blu ray Last or Fail In 5 years?idk...but then you can just get a ps3 and watch blu-rays AND play video gaems!3. Blu-ray Disc and high definition television?-A Blu-ray disc is ONLY for the playstation three. -HD Is the same channel but shows you way better view of things.[ex:More Close up more clearer .]And on Channel 2 it means thatThey just came out with a HD channel.Hope this helped :]4. Do you use blu ray or dvd?still using DVD. i really do not need it, i do not have any films in blu-ray and the players and recorders are still a bit expensive5. Is Blu-ray going to become the new DVD?Yes, in all liklihood it will. People with HDTVs will start buying them soon now that the HD-DVD vs. BlueRay war seems to be over. BlueRay won6. Online movie rentals offering blu-ray?Yes, both Netflix and Blockbuster rent Blu-Rays online7. Technically, how is Blu-Ray better than HD DVD?Although I agree with the two previous answers, my answer is going to be quite a bit different. It does not matter one bit which is technically better. The only thing that matters is which one will still be around when the format war is over. And right now, with what is happened recently, it seems like BluRay will win. But it ai not over till the fat lady sings, so I would still wait to buy into HD. Should not be too much longer now.8. Blu Ray and HD DVD?That's the question that a lot of people are asking. Why are the new technologies so expensive? Well a typical DVD disc can only hold 4.7 GB of information, which is why there are so many movies that offer special editions utilizing a second disc - there's not enough information to keep the resolution of the movie, and high fidelity sound at their highest output, so a second disc is required. But you can hook a DVD to practically any television. When it comes to Blu-Ray and HD DVD players they are similar in that they will both output a High Definition image from a disc, but differ in many other ways. Blu-Ray and HD DVD discs first off can hold up to 10 times more information that a typical DVD so now you can have tons of extras on a disc (commentaries, deleted scenes, games, behind the scenes, easter eggs, etc), while having up to 1080p lines of resolution and up to 8 channels of surround sound - a typical DVD can not do this. Between the two formats you will hear many people picking one over the other, I personally prefer Blu-Ray because more movie studios are backing it, and the disc has more capacity (Blu-Ray up to 50GB, HD DVD up to 25/30 GB). There will be more Blu-Ray movies, and more Blu-Ray compatible players, as well as the Playstation 3 that offers Blu-Ray as well. The price is high at the moment because it is new, as was DVD. I paid $600 for my first DVD player, and now I could walk in and get the current generation unit for $120, and other brands for $40 - $70. Blu-Ray and HD DVD will drop, technology always does. First thing you should do is get an HDTV, then decide which of the High Definition Disc formats is right for you. I hope this helped.9. Can someone tell me what a blu ray disc is?Blu-ray is a Hi definition format it can hold much more info than a regular DVD disc. It is made for HDTV10. When will Columbia release "Lawrence of Arabia" on Blu-ray?Grover Crisp of Sony on 3/10/11:n"Lawrence is not completed, yet, though we have begun work on it. It is a complicated project and will certainly take a year to complete. The 8K scans of the negative are done, so we are at least headed down that road. " snip. ly/yRVwtNovember 13th, 2012 is the release date:blu-ray.com/news/?id=9159#When will Columbia release "Lawrence of Arabia" on Blu-ray?
The National Key R & D Plan Launched the Key Project of "key Technologies and Demonstration of Inter
The National Key R & D Plan Launched the Key Project of "key Technologies and Demonstration of Inter
In order to implement the tasks proposed in the outline of the national medium and long term science and technology development plan (2006-2020), the national key R & D plan launched the implementation of the key special project of "key technologies and demonstration of Internet of things and smart city". According to the deployment of this key special implementation plan, the application guide for targeted projects in 2020 is hereby issued.The city's city city one belt, one road, the other is the key to the development of the strategy. The overall goal of this special project is to focus on the basic theory and key technologies of smart city "sense, unity, knowledge, use and integration", focusing on the strategy of network power and social economic transformation. We will carry out demonstration applications of integrated innovation and integrated services, support the graded and classified demonstration construction of national new smart cities with Chinese urban characteristics, improve urban governance capacity and public service level, and promote China to become a global leader in technological innovation and industrial application of smart cities. Promote the large-scale development of animal networking and smart city and the sharing of "three integration and five spans", form and improve the industrial ecological chain, and make China's Internet of things and smart city technology research, standards and industrial application reach the international leading level.In 2020, the application guide for targeted projects plans to start two research tasks and arrange a national allocation of 50 million yuan. Application demonstration projects require units with large-scale application demonstration capability to take the lead, and enterprises are encouraged to take the lead. Enterprises taking the lead must raise supporting funds by themselves, and the proportion between the total supporting funds and the total national allocated funds shall not be less than 3:1. Among them, the application demonstration content shall include approved construction projects closely related to the content of the guide, encourage the demonstration content of cities (clusters) to gather the key technologies and relevant innovative achievements supported by the state for integrated application demonstration, and encourage cities (clusters) to give priority to the use of innovative technologies and achievements of this special project.The project shall be uniformly declared according to the research direction of the secondary title of the guide (such as 1.1). The project implementation cycle shall not exceed 3 years. The research content of the application project must cover all the assessment indicators listed in the guidelines under the secondary title. Unless otherwise specified, the number of projects to be supported is 1 2. The number of topics under each project shall not exceed 5, and the total number of research units shall not exceed 10. One project leader is set for the project, and one subject leader is set for each subject in the project.In the guide, "the number of projects to be supported is 1 2" means that under the same research direction, when the first two evaluation results of the declared project review are similar and the technical route is obviously different, the first two projects can be considered to be supported. The two projects will be supported in two stages, and the implementation of the two projects will be evaluated after the completion of the first stage, Determine the follow-up support method according to the evaluation results.1. Major scenario application demonstration for different types of cities1.1 construction and demonstration of national urban agglomeration integrated new generation information infrastructure (application demonstration)Research content: facing the needs of the integrated development of national urban agglomeration information infrastructure, study the composition of urban elements for urban management and social governance, and form an urban IOT perception system based on the full coverage of urban elements; Study the open network architecture and secure communication mechanism integrating the Internet, mobile communication network and edge network, form an open, safe and reliable heterogeneous network integration system, and build a new network infrastructure with low delay, high reliability, wide coverage and large bandwidth; Develop technologies and special equipment serving the unified management and dispatching of smart cities with open structure, flexible architecture and supporting flexible resource scheduling; Develop a set of Metro IOT platform deployed in national urban agglomeration; Relying on the metropolitan IOT platform, diversified heterogeneous networks and urban data, build a new generation of digital, universal and intensive information infrastructure in national urban agglomerations, form replicable unified protocol standards, unified authentication system and unified access specifications, promote the construction of integrated cross urban agglomerations linkage and unified standards, as well as horizontal and vertical diversified information exchange and mutual trust, Realize cross city, cross domain, cross bank and cross level data sharing, capacity sharing, mechanism mutual trust and service interoperability.Assessment indicators: put forward the overall technical framework of metropolitan IOT private network, build a set of metropolitan IOT platform that can be actually put into operation, which can gather IOT equipment in no less than 10 industries, no less than 100 types of access equipment in each industry, and no less than 100000 access equipment in each industry; Design a new integrated network integration architecture, develop an edge gateway production system that integrates the functions of low delay message forwarding, high reliable resource scheduling and multi connection collaborative algorithm to meet the needs of secondary development, and support lightweight batch deployment; Explore the construction mode of urban perception system based on Internet of things technology, and form at least 6 8 standard configuration, advanced configuration and incremental configuration of urban IOT perception system construction involving community level, street level, district and county level; Build a new generation of information infrastructure and form industry and cross industry demonstration applications in national urban agglomerations, such as smart government affairs, smart tourism, smart logistics, public safety, public management and public services; At least 7 national, industrial or core enterprise standards shall be formulated.Organization mode: select the best and take the lead by the enterprise.Relevant instructions: Beijing Municipal Commission of science and technology, Shanghai Municipal Commission of science and technology, Guangdong Provincial Department of science and technology and Chongqing Municipal Bureau of science and technology shall be the recommended units to organize the application.1.2 urban livable cognitive computing and integrated service platform and its application demonstration (application demonstration)Research content: study the mechanism and model of urban ecological livable integrated service, as well as the trend prediction, early warning and guidance technology of urban ecological livable integrated service with multi domain linkage, facing the scenarios of urban ecological livable, medical care and health, marine economy and free trade island construction; Carry out research on intelligent acquisition technology of urban multi-source environmental ecological livable information based on the Internet of things, establish a networked coverage system of urban environmental data, carry out research on real-time monitoring technology of urban ecological environment indicators with the goal of urban ecological environment collection and monitoring, and build an ecological environment multi-dimensional dynamic information map early warning system; Medical care and health services for urban residents for 5g communication, Internet of things, edge computing and telemedicine, carry out research on the health service system of citizen health data management, develop key technologies such as triage guidance, remote consultation, auxiliary diagnosis decision support and health risk assessment, and realize regional residents' health file resource sharing and service business collaboration, Improve the utilization rate, service efficiency and coordination efficiency of medical resources in the province; For marine economy, free trade island construction and other scenarios, carry out research on machine learning model and modeling technology of data-driven urban economic development, government service and ecological livability, and develop a dynamic cognitive computing system of urban ecological livability; Research and develop an integrated urban ecological and livable service platform, and carry out application demonstration in urban ecological environment, livelihood services, medical health and elderly care services.Assessment indicators: realize the perception coverage of multi-source environmental information in the core areas of key cities to reach more than 75%, realize the real-time perception of environmental pollution data such as dust, noise, PM 1 / PM 2.5/pm 10, ozone / sulfur dioxide / nitrogen oxide / carbon dioxide, complete the grid real-time monitoring of urban trunk roads and key pollution areas, and realize the full networking of data between cities, The detection accuracy of environmental pollution data shall at least meet the national standards; The accuracy of real-time early warning of urban smart environment is greater than 90%, and the accuracy of environmental pollution source analysis is greater than 80%; Establish a health care service model centered on urban residents, and complete resource sharing and service coordination of at least 10 medical institutions; Establish a smart medical care and health service system for the whole region, and realize the family coverage rate of at least 80% of home-based elderly care in at least two typical cities and core urban areas; Build a data-driven dynamic cognitive computing system for urban ecological livability, and support the cognitive computing of time abnormal potential process of no less than 10 kinds of urban ecological livable data; Develop an integrated urban ecological livable service platform and carry out large-scale application demonstration.Organization mode: it is proposed to support one project, led by the enterprise.Relevant instructions: the Department of science and technology of Hainan Province shall organize the application as the recommendation unit.
Need a Video/audio 'time Base Corrector' with a Very Large Time Buffer
Need a Video/audio 'time Base Corrector' with a Very Large Time Buffer
You can do this with GStreamer and a plugin called rtpjitterbuffer. There is an example usage on the bottom of that page with the gst-launch tool to do a simple desktop playback of an rtp stream with network errors.You can customize this to your need and set specific timeouts and also make a new network stream instead of doing desktop playback. You can do pretty much anything with gstreamer, you just have to read a bit into it.Regarding hardware I do not know of any that does this but I would guess its pretty expensive like it usually is with very specialized hardware1. Laptop Video and Audio On My TV?Sorry, you will need a converter box of some sort. Your laptop charger is only a charger. USB is not practical for graphics output, S-video is only 4 pin. The 7 pin on your TV might be something proprietary.2. Video and audio recording software?First on-camera audio is usually crap. One good technique is to buy an external digital-audio recorder like the Tascam or Zoom H1 ($99-$130) and a budget lavilear microphone (Movo or Audio Technica). It is very easy in video editing software to strip off the in-camera audio and add in the higher quality audio from the recorder. The good part about the small recorders - you wire yourself up but carry the recorder so you are not 'leashed' to a laptop or camera. Pull your camera down by accident a few times and you realize what an advantage this is.3. Video and Audio button missingSharePoint 2013 might require activation of Video and Rich Media site collection feature for this button to appear.The feature adds the Site assets library app type to the site collection. Also, the Video and Audio button appears in rich text editors across the site collection (content editor webpart, pages, edit forms with rich multiline text).4. Is it possible to separate video and audio between motherboard and graphics card using two HDMI cables?Kinda... depends. You will need to connect both HDMI cables, then see if under "sounds" there's option to reroute the sound to the HDMI1 (or 2) instead of speakers or headphones.5. Best Home Theater Connection with my old Home Theater? Video and Audio!?May god have mercy on your souls for buying the worst value in home audio, ever. DO you know what BOSE stands for? Buy Other Sound Equipment. I suggest you do that6. Does a laptop's Video/Audio abilities matter if you're using external screens/speakers?Of course , if the graphics cards supports it too. I have an 1366x768 screen but I watch movies in best quality on my full hd tv:P if you have an old graphic card, it may not support playing 1080p videos. Sound will be ok with any sound card. The external screen is just for the images. like another monitor. the informations come from your laptops graphic card and processor.7. My laptop has Bluetooth, my new TV has Bluetooth, can I send the video/audio to my TV?No, bluetooth is not fast enough8. Does connecting several video or audio cables to create longer cables worsen the signal?An electrical signal carried over a wire always loses a bit of impedance as it travels through the conductor. That loss is dictated by the resistance of the wire. That resistance is governed by the conductors material and thickness. A thinner and longer wire will also pick up interference (RFI) more readily. There are methods of twisting wires (like in CAT5 network cable) to reduce that interference. The frequancy of the signal running through the wire can also have an effect on how much signal will be lost. Generally the higher the frequency the more loss. So the longer the wire, the thicker gauge it should be to prevent signal loss. If you are connecting together a bunch of shorter cables, they were probably properly gauged for a shorter distance. The end result of daisy chaining them together will be a poor signal most likely.9. What is the best way to wirelessly transmit video with audio?Try this software.10. Overlay image in video and pause the video and audio during the specific intervalIn order to pause audio and video, you can either loop the streams or offset the PTS.loop=loop=len_frames:size=1:start=pos_frames,setpts=N/FRAME_RATE/TBHere, len_frames is the length of the loop in frames, and pos_frames is the position of the pause in frames. You can calculate these numbers by obtaining the framerate of the video and multiplying it with the chosen length and timestamp in seconds. The same goes for the audio part, for which you have to use aloop and asetpts, respectively, and the sample rate in Hz. Furthermore, you have to mute the audio by setting the volume=0.The looped video and audio streams will be longer than the originals, and you can then show the overlay on them. As such commands are rather complex to put together, I wrote a Python program that inserts a "buffering" indicator while video and audio are paused. You can check how the loop commands are generated here.See Gyan's answer here, which essentially does:setpts='PTSgte(T,start_time)*(shift/TB)'combined with -vsync vfr, where start_time is the time at which the frames are offset and shift is the shift applied. As for playing the audio during a particular time interval, you can use the -itsoffset input option to offset its start.Or you offset the PTS of the audio stream with a fixed amount using the asetpts filter
Blockchain Technology Can Be Used to Protect Personal Information From Disclosure
Blockchain Technology Can Be Used to Protect Personal Information From Disclosure
"War epidemic" is a major event in China and even the world. The war between human and virus without gunsmoke may have started since the birth of mankind, but there are many tools in human Arsenal, including blockchain. The pulse of mutual chain explores the ability of blockchain war "epidemic" from multiple dimensions.During the period of COVID-19, the largest personal information collection in China is being launched. Where do you come from, where do you go, what is your temperature, where do you live... Such fine-grained information, coupled with a population base of 1.4 billion, may be the largest "population survey" ever conducted by mankind.The chaos of personal information collection also appears at the same time, and personal information leakage has become a new problem.On February 9, the office of the central network security and Information Technology Commission (hereinafter referred to as the "network information office") issued the notice on doing a good job in personal information protection and using big data to support joint prevention and control. The purpose of the notice is to "protect the personal information in the joint prevention and control of New Coronavirus infection," and "use big data including personal information to support joint prevention and control work".The notice of the Internet Information Office has played a deterrent role to individuals and institutions trying to disclose personal information, but it is difficult to eliminate information leakage. If blockchain technology is used in the process of information collection, the worry of the office will not be enough.Chaotic personal information collectionSince the "closure of Wuhan City", the author has been required to fill in various information collection forms, including community property management, community neighborhood committees, work units, children's schools, etc. the author has identified their entities, as well as unconfirmed entities such as "municipal government", "Public Security Bureau" and "Health Commission" spread in the community.There are various ways to fill in, including H5 format, wechat applet and word document. For example, hundreds of related small programs are running when wechat searches for keywords such as "epidemic situation", "anti epidemic", "epidemic prevention", "new crown" and "virus registration".There are many kinds of information collection tools, including individuals, outsourcing companies and large Internet companies, which means that the servers storing this information are different and the security is questionable.From the collection of personal information, it involves a lot of privacy issues, including the ID number, telephone number, family detailed residence and family member's detailed list.With these contents, you can do many illegal things: including being taken by other people's ID card and telephone number for various member registration and handling various membership cards; The ID number and mobile phone number can be copied to the same mobile phone number, resulting in loss of property in the bank card. Have very accurate identity information, sell it to advertisers and be harassed by advertising; Reselling information to fraud companies can make it easier for fraud companies to make up stories that people believe.In fact, personal information leakage has occurred before the epidemic is over. Guangzhou Nanhai District has just investigated and dealt with a case. A passenger in Nanhai took a cruise ship, and there was an epidemic on the cruise ship. The passenger's Avatar, identity and other information were spread.This is why the online information office should send a document to protect personal information.According to the notice of the Internet Information Office, the personal information collected for epidemic prevention and control and disease prevention and control shall not be used for other purposes. No unit or individual may, without the consent of the collector, disclose personal information such as name, age, ID number, telephone number, home address, etc., except for the need for joint prevention and control and desensitization. The notice also points out that institutions that collect or master personal information should be responsible for the security protection of personal information and take strict management and technical protection measures to prevent theft and disclosure.From the perspective of the main body of information collection and technical service companies, it is not easy to meet the requirements of network information office. Luo Xiao, CEO of Yulian technology, said to the pulse of mutual chain: "there are indeed many links in the form of H5 on Web pages to obtain citizen information. Moreover, due to the limited technical ability of some technology companies, it is extremely easy to cause the disclosure of citizen privacy information regardless of experience."Blockchain technology is being used to collect personal information for epidemic prevention because it can protect users' privacy. For example, the "access" developed by Yulian technology is deployed on the Yulian cloud based on blockchain technology to encrypt and protect the collected citizen information, which can ensure the security of data. Luo Xiao said: "even Yulian technology can't see the user information, and after the epidemic, it will publicly destroy the deployment of this product."Blockchain and use of private dataIt is worth noting that in the notice of the Internet Information Office, it not only requires the protection of personal information, but also puts forward two requirements.First, the health department has the right to call. The notice stipulates that except for the institutions authorized by the health department of the State Council in accordance with the network security law of the people's Republic of China, the law of the people's Republic of China on the prevention and control of infectious diseases and the regulations on emergency response to public health emergencies, no other units or individuals shall collect and use personal information without the consent of the recipient on the grounds of epidemic prevention and control and disease prevention.Second, collect information differently. The notice stipulates that the collection of personal information necessary for joint prevention and control shall refer to the national standard personal information security code, adhere to the principle of minimum scope, and the collection object shall be limited to key groups such as diagnosed persons, suspected persons and close contacts. Generally, it does not target all groups in a specific area to prevent de facto discrimination against people in a specific area.However, the current personal information collection methods are difficult to meet the requirements of notification. For example, if the health department invokes data, its operators can certainly obtain this data; At present, we would rather collect all the information than miss one person.However, blockchain has given solutions on both points.For example, on July 30 last year, Lai Xin, chief engineer of Xunlei chain, released the new technology of Xunlei chain - traceable privacy protection technology at the 4th China Network and information security conference. This technology is to solve the pain point that it is difficult to achieve both data privacy protection and information traceability on the chain. It is reported that this technology encrypts and hides data through encryption algorithms such as ring signature and zero knowledge proof, so as to protect user privacy, meet the needs of organizations or institutions with information control authority through cryptography technology, and minimize risks. In this way, the problem that the health department invokes information but others are invisible is met.Previously, Xunlei chain's "chain data regulatory privacy scheme" has been applied in medical scenarios. This scheme can also be applied to the collection of epidemic prevention personal information. For example, relevant collected objects can upload data encryption to the chain through supervised privacy encryption technology to protect the privacy of the data uploaded to the chain. Regulators with data access authority, such as provincial and municipal CDCs, can view the ciphertext data on the chain through the regulatory key, so as to ensure the timely and effective data and achieve security and controllability.
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