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      "body": "http://paimages.prothom-alo.com/contents/cache/images/640x359x1/uploads/media/2018/07/29/a95152f4cc475ff360bbdcb292973b28-5b5d9a6ada2b2.gif\n\nসুন্দরবনের বেঙ্গল টাইগার ক্রমশ দুর্বল হয়ে পড়ছে। প্রতিকূল পরিস্থিতির সঙ্গে খাপ খাওয়ানোর ক্ষমতা হারাচ্ছে প্রাণীটি। দেশের ও বিদেশের একদল বিজ্ঞানী গবেষণা করে দেখেছেন, ১০০ বছর ধরে বেঙ্গল টাইগার শুধু সুন্দরবনের মধ্যে টিকে আছে। বনের মধ্য দিয়ে প্রবাহিত পাঁচটি দীর্ঘ নদী তাদের নির্দিষ্ট কিছু স্থানে আবদ্ধ করে ফেলেছে। এতে এক এলাকার বাঘের সঙ্গে অন্য এলাকার বাঘের প্রজনন-সম্পর্ক তৈরি হচ্ছে না। এর সঙ্গে যোগ হয়েছে নিয়মিত নৌচলাচল ও মানুষের নানা তৎপরতা। ফলে সুন্দরবনের মধ্যে বাঘের এলাকাভিত্তিক বৈশিষ্ট্য তৈরি হচ্ছে, যা ওই প্রাণীটির ভবিষ্যতে টিকে থাকার ক্ষমতা নষ্ট করে দিচ্ছে।\n\n‘সুন্দরবনের বাঘের জিনগত কাঠামো কি নদীর মাধ্যমে প্রভাবিত হচ্ছে?’ শীর্ষক গবেষণা প্রবন্ধটি চলতি বছরের শুরুতে বিশ্বখ্যাত স্প্রিংগার প্রকাশনী থেকে প্রকাশিত হয়েছে। জাহাঙ্গীরনগর বিশ্ববিদ্যালয়ের প্রাণিবিদ্যা বিভাগের অধ্যাপক আবদুল আজিজের নেতৃত্বে পরিচালিত ওই গবেষণায় আরও যুক্ত ছিলেন ঢাকা বিশ্ববিদ্যালয়ের প্রাণিবিদ্যা বিভাগের অধ্যাপক আনোয়ারুল ইসলাম, ইউনিভার্সিটি কলেজ লন্ডনের শিক্ষক অ্যাডাম বার্লো ও যুক্তরাজ্যের তিনটি বিশ্ববিদ্যালয়ের তিনজন গবেষক।\n\nএ ব্যাপারে অধ্যাপক আবদুল আজিজ প্রথম আলোকে বলেন, চোরা শিকারিসহ নানা তৎপরতায় সুন্দরবনের বাঘের হুমকি বাড়ছে। আর প্রাকৃতিকভাবে সুন্দরবন পাঁচটি নদী দিয়ে বিভাজিত। ফলে এর প্রভাব তো বাঘের বৈশিষ্ট্যের মধ্যে থাকবেই। কিন্তু সাম্প্রতিক বছরগুলোতে সুন্দরবনের ভেতর দিয়ে নৌযান চলাচল বেড়ে গেছে। ফলে বাঘের জনসংখ্যা ও বসতি বিভাজিত হয়ে পড়েছে। সুন্দরবনের চারপাশে যেভাবে শিল্পকারখানা হচ্ছে, তাতে নৌযান আরও বাড়বে। এই নৌচলাচল নিয়ন্ত্রণে আনা না গেলে বাঘের চলাচল আরও নিয়ন্ত্রিত হবে ও প্রাণীটি জিনগতভাবে আরও দুর্বল হয়ে পড়বে।\n\nসরকারি হিসাবে বর্তমানে বাঘের সংখ্যা ১০৬ টি। ২০১৪ সালের ২০ নভেম্বর থেকে ২০১৫ সালের ২৬ ফেব্রুয়ারির মধ্যে পরিচালিত ওই গবেষণায় বাঘের মলের ৫১২টি নমুনা সংগ্রহ করা হয়েছিল। এই মল থেকে সংগৃহীত ডিএনএ বিশ্লেষণ করা হয়।\n\nগবেষণায় বাঘের জিনগত কাঠামোর ওপর সুন্দরবনের ভেতর দিয়ে বয়ে যাওয়া রায়মঙ্গল, হাড়িয়াভাঙ্গা, আড়পাঙ্গাসিয়া, শিবসা ও পশুর নদ-নদীর প্রভাব পাওয়া যায়। এই নদ-নদীগুলো সুন্দরবনের বাঘকে জিনগতভাবে আলাদা করে ফেলছে। নদ-নদীগুলো দেড় থেকে সাড়ে তিন কিলোমিটার পর্যন্ত প্রশস্ত হওয়ায় বাঘ সহজে পারাপার করতে পারে না। এতে প্রজননের মাধ্যমে জিনের আদান-প্রদান বাধাপ্রাপ্ত হচ্ছে। বনের একই এলাকার মধ্যে বাঘের প্রজনন-সম্পর্ক সীমাবদ্ধ হয়ে পড়ছে। এতে বাঘের জিনগত বৈশিষ্ট্য বৈচিত্র্য হারাচ্ছে।\n\nবন বিভাগের বন্য প্রাণী ও প্রকৃতি সংরক্ষণ বিভাগের বন সংরক্ষক জাহিদুল কবির বলেন, সুন্দরবনে বাঘ গত ১০০ বছরে ৮ থেকে ১০টি প্রজন্ম অতিক্রান্ত করেছে। বনটি বেশ বড় হলেও সেখানে বাঘের বসবাস সম্ভব ও খাদ্য আছে, এমন এলাকা খুবই কম।\n\nআজ রোববার বিশ্ব বাঘ দিবস। এবারের দিবসের মূল স্লোগান ‘বাঘ বাঁচাই, বাঁচাই বন, রক্ষা পাবে সুন্দরবন’।",
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      "title": "NVIDIA CEO: “Cryptocurrency Is Here to Stay”",
      "body": "Speaking with Mad Money host Jim Cramer, NVIDIA CEO Jensen Huang recently claimed that “cryptocurrency is here to stay,” and he “doesn’t see the craze ending anytime soon.”\n\nThough it first came to fruition in 2008, bitcoin gained a solid taste of mainstream popularity in 2017 when its price began rising faster than anyone had anticipated. The year started with a single bitcoin trading at nearly $1,000, though things ended on a higher note when the currency nearly grazed the $20,000 mark.\n\nSince January 2018, bitcoin and other virtual currencies have experienced serious drops in their prices, but Huang is convinced that cryptocurrency remains as popular as ever.\n\n“Cryptocurrency will be here,” he stated in the interview while discussing the future of finance. “The ability for the world to have a very low-friction, low-cost way of exchanging value is going to be here for a long time.”\n\nNVIDIA is a technology company based in Santa Clara, California. Some of the enterprises’ staple products are its graphics processing units or GPUs. These small processors, Huang explains, were some of the main reasons the company first decided to get involved in cryptocurrency last year.\n\nThe GPUs have a powerful ability to mine virtual currencies, and blockchain technology requires computers that can be distributed “all over the world” while remaining immutable and safe. Thus, Huang felt his company’s products could be greatly beneficial to cryptocurrency miners:\n\n“The reason why cryptocurrency became such a popular thing on top of our GPUs is our GPU system is the world’s largest installed base of distributed supercomputing. Our processor serves as the perfect processor to enable this supercomputing capability to be distributed, and that’s the reason why it’s used.”\n\nInterestingly, Huang noted that while the chips were no doubt powerful and crucial to the mining industry, he and his fellow executives are “not ready to move” on this just yet. For the time being, NVIDIA is primarily involved in the gaming business, data centers and self-driving cars, and cryptocurrency and mining operations account for only small portions of the company’s profits.\n\nIn fact, NVIDIA currently has no alleged involvement in Bitcoin, per Huang’s comments at a recent GPU technology conference. He said its processors are predominantly used to mine ether, which accounted for roughly 6 percent of the company’s GPU sales in 2017.\n\n“Ethereum ‘ether’ was designed as an algorithm to ensure no singular entity (or a few entities) has the power to control the ether,” he said. “It was designed so that the algorithm requires the type of computing capabilities — the type of processing capabilities — that are made possible by GPUs in a distributed system. The GPU is popular with Ethereum because the GPU is the single largest distributed supercomputer in the world. It is the only supercomputer that is literally in everyone’s hands, and no single entity can control the currency.”\n\nHe says that the influence of cryptocurrency isn’t likely to affect how they do business in the present, though he’s very confident this could change in the future:\n\n“Gaming is a much bigger business; data center is a much bigger business; our professional graphics is a much bigger business, and, of course, in the future, everything that moves will be autonomous, and we’ll have autonomous capabilities, and that’s going to be a Speaking with Mad Money host Jim Cramer, NVIDIA CEO Jensen Huang recently claimed that “cryptocurrency is here to stay,” and he “doesn’t see the craze ending anytime soon.”\n\nThough it first came to fruition in 2008, bitcoin gained a solid taste of mainstream popularity in 2017 when its price began rising faster than anyone had anticipated. The year started with a single bitcoin trading at nearly $1,000, though things ended on a higher note when the currency nearly grazed the $20,000 mark.\n\nSince January 2018, bitcoin and other virtual currencies have experienced serious drops in their prices, but Huang is convinced that cryptocurrency remains as popular as ever.\n\n“Cryptocurrency will be here,” he stated in the interview while discussing the future of finance. “The ability for the world to have a very low-friction, low-cost way of exchanging value is going to be here for a long time.”\n\nNVIDIA is a technology company based in Santa Clara, California. Some of the enterprises’ staple products are its graphics processing units or GPUs. These small processors, Huang explains, were some of the main reasons the company first decided to get involved in cryptocurrency last year.\n\nThe GPUs have a powerful ability to mine virtual currencies, and blockchain technology requires computers that can be distributed “all over the world” while remaining immutable and safe. Thus, Huang felt his company’s products could be greatly beneficial to cryptocurrency miners:\n\n“The reason why cryptocurrency became such a popular thing on top of our GPUs is our GPU system is the world’s largest installed base of distributed supercomputing. Our processor serves as the perfect processor to enable this supercomputing capability to be distributed, and that’s the reason why it’s used.”\n\nInterestingly, Huang noted that while the chips were no doubt powerful and crucial to the mining industry, he and his fellow executives are “not ready to move” on this just yet. For the time being, NVIDIA is primarily involved in the gaming business, data centers and self-driving cars, and cryptocurrency and mining operations account for only small portions of the company’s profits.\n\nIn fact, NVIDIA currently has no alleged involvement in Bitcoin, per Huang’s comments at a recent GPU technology conference. He said its processors are predominantly used to mine ether, which accounted for roughly 6 percent of the company’s GPU sales in 2017.\n\n“Ethereum ‘ether’ was designed as an algorithm to ensure no singular entity (or a few entities) has the power to control the ether,” he said. “It was designed so that the algorithm requires the type of computing capabilities — the type of processing capabilities — that are made possible by GPUs in a distributed system. The GPU is popular with Ethereum because the GPU is the single largest distributed supercomputer in the world. It is the only supercomputer that is literally in everyone’s hands, and no single entity can control the currency.”\n\nHe says that the influence of cryptocurrency isn’t likely to affect how they do business in the present, though he’s very confident this could change in the future:\n\n“Gaming is a much bigger business; data center is a much bigger business; our professional graphics is a much bigger business, and, of course, in the future, everything that moves will be autonomous, and we’ll have autonomous capabilities, and that’s going to be a Speaking with Mad Money host Jim Cramer, NVIDIA CEO Jensen Huang recently claimed that “cryptocurrency is here to stay,” and he “doesn’t see the craze ending anytime soon.”\n\nThough it first came to fruition in 2008, bitcoin gained a solid taste of mainstream popularity in 2017 when its price began rising faster than anyone had anticipated. The year started with a single bitcoin trading at nearly $1,000, though things ended on a higher note when the currency nearly grazed the $20,000 mark.\n\nSince January 2018, bitcoin and other virtual currencies have experienced serious drops in their prices, but Huang is convinced that cryptocurrency remains as popular as ever.\n\n“Cryptocurrency will be here,” he stated in the interview while discussing the future of finance. “The ability for the world to have a very low-friction, low-cost way of exchanging value is going to be here for a long time.”\n\nNVIDIA is a technology company based in Santa Clara, California. Some of the enterprises’ staple products are its graphics processing units or GPUs. These small processors, Huang explains, were some of the main reasons the company first decided to get involved in cryptocurrency last year.\n\nThe GPUs have a powerful ability to mine virtual currencies, and blockchain technology requires computers that can be distributed “all over the world” while remaining immutable and safe. Thus, Huang felt his company’s products could be greatly beneficial to cryptocurrency miners:\n\n“The reason why cryptocurrency became such a popular thing on top of our GPUs is our GPU system is the world’s largest installed base of distributed supercomputing. Our processor serves as the perfect processor to enable this supercomputing capability to be distributed, and that’s the reason why it’s used.”\n\nInterestingly, Huang noted that while the chips were no doubt powerful and crucial to the mining industry, he and his fellow executives are “not ready to move” on this just yet. 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It is the only supercomputer that is literally in everyone’s hands, and no single entity can control the currency.”\n\nHe says that the influence of cryptocurrency isn’t likely to affect how they do business in the present, though he’s very confident this could change in the future:\n\n\n“Gaming is a much bigger business; data center is a much bigger business; our professional graphics is a much bigger business, and, of course, in the future, everything that moves will be autonomous, and we’ll have autonomous capabilities, and that’s going to be a much bigger market, but cryptocurrency gave it that extra bit of juice that caused all of our GPUs to be in such great demand.”\n\nhttps://www.youtube.com/watch?time_continue=37&v=SgR4rZKtZEg",
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      "title": "Bitcoin Is Close to Cutting Fees with Better Coin Selection",
      "body": "One of the technical mechanisms that has helped earn bitcoin comparisons to cash is on the verge of a major update.\n\nCalled \"coin selection,\" the term refers to the algorithm that today decides which bits of data come together to create a user's transaction. Essentially, the coin selection code replicates the process of giving, say, a $10 bill to a cashier for a $7 item and the consumer receiving $3 in change.\n\nBut if that doesn't sound particularly complex, remember bitcoin is experimental software, and this function, while working, isn't altogether optimized. Making matters worse, the part that perhaps needs tweaking has a direct impact on user costs.\n\n\"Bitcoin Core's original coin selection algorithm actually needs a lot of reworking, especially with regards to transaction fees. It's inefficient and it ends up doing a weird loop to try to guess the amount of transaction fees that are needed,\" Bitcoin Core contributor Andrew Chow told CoinDesk.\n\n\n\n\nMark Erhardt an engineer at wallet provider BitGo agrees, going so far as to call the algorithm \"convoluted\" during a recent interview on the podcast Noded.\n\nAs such, developers have been working on a new algorithm, dubbed \"branch and bound\" or \"BnB,\" which forges together data in a more efficient way, resulting in a small scaling bump and lower transaction fees.\n\nErhardt first proposed some optimizations nearly two years ago, while Chow was the first developer to code up the changes.\n\nAnd recently the change was deemed ready to be added to bitcoin's most popular software implementation, Bitcoin Core, and so was merged into the codebase. Even better for users, the feature should be available for widespread use with the release of the 17th version of the software in the next year or so.\n\nSpeaking to the benefits of the changes, Chow said:\n\n\"This will let us tidy up the coin selection code a lot and actually make it possible for one person to understand exactly what the coin selection algorithm is doing.\"\n\nNo change needed\nStepping back, as mentioned, each bitcoin transaction a user sends is made up of different smaller amounts of bitcoin.\n\nThat's because, say you have one bitcoin in your wallet, this bitcoin is usually not just one piece of data. Rather, it's often made up of a number of chunks of data pieced together. You might have one, two or dozens of little transaction chunks - each called \"unspent transaction outputs\" (UTXOs).\n\nFor instance, tied to your bitcoin wallet address might be one piece of data worth 0.1 BTC, another worth 0.3 BTC, another of 0.1 BTC and a last one, worth 0.5 BTC, to make up a whole bitcoin.\n\nThese pieces are based on the transactions that came before them and how they were initially split up to send to your wallet.\n\nSo, if you need to send 0.2 BTC, the Bitcoin Core \"coin selection\" algorithm might decide to put the piece of data worth 0.3 BTC in what's called the \"input,\" creating the transaction. There will then be two outputs: 0.2 BTC, which will be sent to the recipient, and 0.1 BTC, which will be put back into your wallet as the \"change output.\"\n\nYet, according to the developers, the algorithm isn't all that good at deciding how to select coins for transactions.\n\nThe algorithm almost always automatically creates \"change outputs,\" which often aren't necessary and waste space on the blockchain, Erhardt explained. In the example above, the algorithm could avoid this by picking the two pieces of data worth 0.1 BTC and not have to send \"change\" back to the sender at all.\n\nHe continued, speaking to another unfortunate side effect:\n\n\"You don't want transactions to be ground up to dust.\"\n\n\"Dust\" are pieces of bitcoin that are so small they're almost not worth spending, since the fees could be more than the transaction itself. They're perhaps analogous to pennies, in that a penny actually costs more to make than it's actually worth in purchasing goods.\n\nHow to choose?\nThe new algorithm, BnB, avoids these issuers by trying to eliminate as many change output scenarios as possible. In short, it looks at all the inputs to see if there's a way to reach exactly the number of bitcoins a user wants to send in a transaction.\n\n\"This helps shrink the UTXO set a little more,\" Chow said. \"Additionally, transactions, where an exact match was found, will generally be smaller than ones where there is change, so this will also save on transaction fees for the user and free up a few more bytes of block space to fit in other transactions.\"\n\nAnd there's evidence this works. In a simulation, Erkhardt found that, in approximately 40 percent of transactions that would normally have change outputs, the new algorithm was able to get rid of the unnecessary data.\n\nIn addition to these user benefits, the code change also helps developers, since the new algorithm is much easier to understand for a technical standpoint.\n\nStill, developers aren't done tweaking the coin selection process. Chow and others plan to take the algorithm further, by adding a so-called \"simple random draw.\"\n\nWhen the BnB algorithm goes through all a bitcoin user's UTXOs and simply can't avoid creating a change output, it then falls back on the original coin selection process. But with simple random draw, the algorithm will choose random UTXOs until it reaches the amount of money required.\n\nInterestingly, developers find randomly choosing coins is a better method than the more deliberate algorithm Bitcoin Core uses today.\n\nIt's the culmination of years of work, but according to Erhardt, the process couldn't have been much quicker. Coin selection is a \"sensitive part\" of the code and changing it has \"global consequences,\" he said.\n\nAs such, \"no one wanted to fiddle with it for too long,\" Erhardt explained, adding:\n\n\"Now we've put in a lot of the plumbing for further changes.\"\n\nBinary code image via Shutterstock\n\nThe leader in blockchain news, CoinDesk is a media outlet that strives for the highest journalistic standards and abides by a strict set of editorial policies. CoinDesk is an independent operating subsidiary of Digital Currency Group, which invests in cryptocurrencies and blockchain startups.\n\nhttp://www.foundationsa.com/wp-content/uploads/2017/10/bitcoin-1.jpg",
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      "title": "Best Airdrop free",
      "body": "Now I will go through an example airdrop from a project that I believe is of decent quality. This one is particularly easy one to complete (you do not have to follow any account or join a Telegram group), and gives a large amount of coins for free. The project is Synapse AI, which aims to create a decentralized machine learning marketplace in which “agents” can be paid to provide real-world data, and models can then be trained off of that data and used as micro-services. They are currently doing their ICO, which ends soon, so if this sounds really interesting to you, definitely consider buying some tokens.\n\nhttps://cdn-images-1.medium.com/max/800/1*p8Vp0P6hFeC6kNgYYwZNCA.png\n\n\nFree Ico Airdrop \n\n Antairdropbot 1000 ATL Coin free\n\nhttp://telegram.me/atlantairdropbot?start=527562\n\n\nGift.ONE, the global biggest airdrop\n\nGift.ONE, the global biggest airdrop organization of cryptocurrency, is airdropping million Tokens!\n1GIFT = US$0.2,get 100GIFT by registration,\nGain more 100000GIFT from any activities,\nClick link to get GIFT:\nhttps://gift.one/i/64797500225\nWin lottery for iPhoneX、BTC、ETH、GIFT everyday!\n\neobot Free \n\nhttps://www.eobot.com/user/1000604\n\n\nhttps://sphere.social/wp-content/uploads/2017/09/mainlogo2-1.png\n\n\nhttps://sphere.social/?ref_code=pj55b0fqzp11",
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