우리 아들에게 설명 해 주려고 만든 인포그래픽입니다. 초보자님들 보시면 좋을듯 해서 공유합니다.
1. 송금을 하기 위해서는 보내는 사람 계좌 번호, 받는 사람 계좌 번호, 보내는 액수 등이 필요하고 이 자료를 모두 기록하고 보내는 사람 통장에서 돈을 빼고 받는 사람통장에 돈을 넣는 과정을 트랜젝션이라고 합니다. 한국말로 거래 기록이라고 이해하시면 됩니다.
2. 이런 트랜젝션 자료를 여러개를 모아서 상자 속에 넣어 보관을 합니다. 이 상자를 블럭이라고 부릅니다.
3. 01번 블럭이 가득 차면 해시를 만드는데 해시라는 것은 블럭의 상태를 특수한 번호로 변환하여 기록하는것 입니다. 이것은 마치 상자의 상태를 그대로 사진으로 찍어두는 것과 비슷합니다. 그렇게 해시를 만드는 이유는 해킹을 방지하기 위해서입니다. 누군가 내용을 조금만 바꾸어도 해시가 변경되기 때문에 02번 블럭의 해시 데이터 (사진)과 비교하면 위조 여부를 확인 할수 있기 때문에 매우 중요한 것입니다 .
그리고나서 02번 상자에 01번 상자 사진과 트랜젝션 데이터가 기록되고 나면 03번 상자에 02번 사진이 또 기록되게 됩니다. 이것은 결국 01번 상자를 변경(해킹)하면 02번과 그이후 모든 상자의 사진을 변경해야만 완벽하게 위조할수 있게 됩니다. 그런식으로 연결된 상자가 너무 많으면 위조가 너무너무 힘들어 진다는 말이죠.
4. 채굴 : 채굴이라는 것은 새로운 상자속에 트랜젝션 데이터를 기록하고 해시데이터를 기록하는 것입니다. 그리고 정말 중요한것은 상자에 모든 내용을 기록할 때마다 보상이 주어집니다. 트렌젝션, 해시등의 데이터를 기록하는 일을 하고 일을 한 대가를 받는 것인데 일하는건 쉬운데 돈을 정말 많이 준다면 그 일은 누구나 하고 싶어 하겠죠?
그래서 엄청 나게 많은 사람 들이 서로 상자(블럭)에 기록하는 일을 하려고 합니다. 그래서 상자속에 먼저 기록하기 대회를 열어서 1등한 사람만 상금을 주기로 했습니다. 모든 일하러 온 사람들 에게 새로운 상자를 나누어 주는데 그 상자는 자물쇠로 잠겨 있습니다. 그래서 누구든 그 자물쇠 비밀 번호를 먼저 찾아서 상자를 연 사람만 트랜젝션이랑 해시데이터를 넣을수 있고 그렇게 상금을 받을수 있습니다.
이 대회에서 자물쇠의 비밀 번호 찾는 과정을 작업 증명 이라고 부릅니다. (Proof of work) 줄여서 POW 라고 하죠.
그 대회는 매 10분 마다 열립니다. 참여하는 사람도 엄청나게 많습니다. 그래서 항상 열쇠 비밀번호를 열심히들 찾고 있지요. 그런데 너무 번호가 쉬워서 빨리 찾으면 그다음번에는 찾기 어려운 비밀 번호를 줍니다.
그렇게 해서 10분정도에 상자(블럭)를 열수 있도록 조절합니다. 그 대회상금이 얼마냐구요? 비트코인으로 2017년 11월 16일 현재 12.5 비트를 주는데 1 비트가 870만원이니 상자 열때마다 1억이 넘는 돈을 받습니다. 상자(블럭) 한개만 열어도 부자되겠네요!!
참! 그리고 트랜잭션 마다 수수료도 있습니다. 즉 상자(블럭)열때 보상에다가 트랜잭션 수수료 까지 정말 돈을 잘 벌겠죠?? 그렇지만 지금 비밀번호가 너무너무 어려워져서 정말 정말 비싼 컴퓨터로 비밀번호를 찾아도 몇달이 걸릴정도로 어렵답니다. 이렇게 비밀번호 찾기 어렵게 만드는 것을 난이도 상승이라고 합니다.
*** 실제 블럭체인 구성과 작동 방식은 위 그림과 완전히 일치하지는 않습니다. 이해를 돕기 위해 예시를 구성하며 개념 전달에 맞추어 재구성 하였습니다. 더 깊은 내용은 다른분의 글들을 분석하시면 충분히 차이를 이해 하실수 있을 것입니다. ***
By Julien Boudet, Brian Gregg, Jane Wong, and Gustavo Schuler
What customers want and what businesses think they want are often two different things. Here’s what customers are looking for.
Anyone who has gotten an unsolicited and irrelevant offer related to something they’ve done online knows that creepy feeling that someone is watching me. This kind of reaction is the third rail of today’s drive to personalize interactions with customers.
That’s a problem because, when done right, personalization can be a huge boon for retailers and consumers. Targeted communications that are relevant and useful can create lasting customer loyalty and drive revenue growth of 10 to 30 percent. The challenge is to personalize in a way that doesn’t cross lines and delivers genuine value and relevance. But how do you know?
To better understand what customers really value, we asked 60 shoppers to create mobile diaries of their personalized interactions with various brands over two weeks. With over 2,000 entries in total, we were able to see what kind of personalized communication works for customers and what doesn’t.
Here are the five things that customers said they value when it comes to personalized communications:
1. Give me relevant recommendations I wouldn’t have thought of myself.
One of the most popular personalization techniques is to remind shoppers of items they browsed but didn’t purchase. Using a common digital-marketing feature called retargeting, these reminders appear as ads on other websites the shopper visits or are delivered via email. Although an established technique, it is one with great potential for missteps and can easily come off as creepy or annoying if not executed thoughtfully. Shoppers don’t want to be constantly reminded of products they’ve already bought or searched for, especially if the ads appear either too soon, too frequently, or too late in the process.
One shopper found no value to an appreciation email she received after purchasing a puffy jacket. It recommended other similar jackets she might like. Regarding this product, you only need one. Why send an email for other similar coats? she asked.
To provide something a customer might be interested in, companies need to use more sophisticated recommendation algorithms to offer complementary products or services instead of just the things the shopper has already browsed or bought. This might entail, for instance, suggesting a cocktail dress for someone who has just bought or searched for stiletto heels. Customers who browse at Nordstrom.com often get product recommendations for similar items in different product categories the next time they visit Facebook. Another effective tactic is communicating in a way that people actually talk to each other. The e-commerce clothing retailer Revolve, for instance, nudges shoppers this way: If you can’t stop thinking about it, buy it <3.
Finally, with any retargeting message, it’s important to observe who responds and who doesn’t, adjust the frequency accordingly, and cap the number of impressions for everyone, especially those who never respond—continuing to retarget these shoppers will only be annoying.
2. Talk to me when I’m in shopping mode.
When to send a message is just as important as what it says. Figuring that out requires taking a close look at behaviors, patterns, and habits.
A clothing retailer found that shoppers who visited one of their physical stores or the online store were more likely to open and respond to messages that were delivered either later on that same day or exactly a week later. Sending messages at those particular times meant the company was reaching people when they were either still thinking about shopping, or at a time when shopping for clothes made the most sense for their particular schedule. Previous order data can provide useful cues about activities such as ordering a gift for someone’s birthday or anniversary.
Getting the timing wrong virtually eliminates the chance for a purchase while potentially annoying the customer. For example, an Internet service provider figured out that a consumer had moved. But the company waited too long to reach out. It’s now been a month since I moved, so obviously I already have my Internet service hooked up, the customer said.
3. Remind me of things I want to know but might not be keeping track of.
A highly effective way to become relevant to shoppers is through tracking specific events and circumstances they are likely to want to know about. This might take the form of a reminder when someone may be running out of an item purchased earlier, when a desired item is back in stock or on sale, or when a new style is launched for a product or category the shopper has repeatedly bought.
Retailers, however, should be careful to provide shoppers with a trigger for the targeted message. One shopper told us she received an Instagram ad for cat-themed socks, which she had purchased from the same retailer a year earlier. The shopper knew the retailer was trying to get her to repurchase, but there was no attempt to connect with her beyond the appearance of the ad.
4. Know me no matter where I interact with you.
Consumers expect retailers to connect digital messages with their offline experiences. For many organizations, this is particularly challenging, because it requires collaboration between disparate areas of the organization, such as store operations, event managers, PR, digital marketing, and analytics. Yet if done effectively, communications that seamlessly straddle both online and offline experiences—and provide real value—can make a customer feel a retailer really knows them.
When cross-channel communication involves using information that customers have not actively provided, retailers should try to supply information that consumers will find truly valuable. Starbucks, which uses location information from customers’ mobile phones, asks people who are about to place an order at a store that’s an hour away from their current location if they really want to place their order now, since the order will be ready (and getting cold) well before they arrive at the store. Most customers do not object to such location tracking because it offers them information they are likely to find helpful.
5. Share the value in a way that’s meaningful to me.
Loyalty programs and direct-purchase information can tell retailers what types of products an individual customer buys, how often he or she buys them, when they buy, and what product categories they never purchase. Many companies, however, fail to take full advantage of this information to personalize their discounts and communications to their loyal customers. Customer offers are an important way to build customer loyalty and prevent churn. Personalizing them (and often gamifying the experience) is a highly effective way to not only inspire purchases but also encourage new buying behaviors.
Starbucks’ bonus star challenge is one such example. The company selects three particular items for loyalty customers to buy within a given week in order to qualify for bonus points that equal a free drink. These items are carefully chosen for each individual customer: two products they purchase frequently and one that leads them into a new, high-value category. If a customer, for instance, frequently purchases breakfast items, their discovery product might be a lunch item. If they tend toward healthier selections, the new item might be a salad.
What to do to ensure you’re not being creepy
Any successful personalization effort hinges on the creation of messages and experiences offering a high degree of value to the customer. But how do you determine what’s valuable? To help answer this, we use a simple formula:
This formula shouldn’t imply an exact science when it comes to personalization. But it does highlight the key issues that executives need to address.
Customers see value as a function of how relevant and timely a message is in relation to how much it costs, meaning how much personal information has to be shared and how much personal effort it takes to get it. Importantly, trust in the brand will boost overall value, though that can grow or recede over time, depending on the customer’s satisfaction with various interactions with the brand.
In navigating this value equation, we have found addressing the following questions helpful:
Are you infusing empathy into your customer analytics and communications design?
To truly build empathy for customers, companies must understand their diverse attitudes, shopping occasions, and need states and build them into an attitudinal segmentation. Such attitudinal segmentation then needs to be layered onto the customer database in order for companies to be able to act on it to deliver on relevant and personalized messaging. This is a step many marketers miss.
Additionally, companies should be crafting their customer analytics and communications based on the customer’s journey (the set of interactions a customer has with a brand to accomplish a task). We’ve found that focusing on the satisfaction customers have with their journeys overall drives far more growth than customer satisfaction with individual touchpoints.
Are you listening carefully for feedback on customer acceptance?
Leaders in personalization are constantly testing and learning to improve their communication and engagement with customers and to identify potential issues early. They do this by digging into both upstream (likes, opens, clicks) and downstream (conversions, unsubscribes, ROI) engagement metrics. They use this information to get a better understanding of the value of the customer, for instance, how much the customer will spend relative to the cost of moving them from less engaged to more engaged.
On the flip side, they can also evaluate the economic impact that negative activity, such as unsubscribes and app notification blocks, has on a customer’s lifetime value. This allows them to more accurately appraise campaigns. For example, if one particular communication brings in twice the revenue but also elicits twice the unsubscribe rate as another communication, they will be able to determine which one is more valuable.
While data and advanced analytics play a crucial role in understanding shopper behavior, qualitative listening tools are also critical. Regular engagement with an ongoing shopper panel, for example, and ethnographic research and observation can offer valuable, in-depth, attitudinal feedback on the impact of personalized communications. Close monitoring of social media helps with the quick identification and resolution of potential problem areas.
There’s no question that doing effective personalized marketing at scale is a sizable challenge. Companies that deliver customers timely, relevant, and truly personal messages, however, can build lasting bonds that drive growth.
Literally hundreds of thousands of people have shared what they thought were Steve Jobs’ Last Words. But guess what – they have all shared a FAKE STORY. When told the truth, many either refused to accept it, or say that the message is more important than the truth.
Well, the truth is when we share a fake story about a famous person, it teaches other people that it’s okay to lie about people, as long as it’s for a good reason. Do we really want to teach our children that? Do we really believe that it’s legal or even moral to tell lies about other people, even if it’s for a good reason?
We refuse to apologise for tearing off this veil of lies. We will tell you the truth about Steve Jobs, and demand that you tell the unvarnished truth. If the sentiments in this story is so “amazing”, do you really need to embellish it with fake references to famous people to “sell the message”?
Read this article, and SHARE IT, so that other people won’t be fooled by it. SHARE IT so that clickbait websites cannot make use of it to gain likes, shares and clicks. Don’t be part of a lie. Stop helping people benefit from such lies.
Originally posted @ 2015-11-11
Updated @ 2016-02-18 : Added two new sections on Steve Jobs being on artificial respiration, and his stay in the hospital.
Updated @ 2017-01-14 : Added a new preface, and updated several parts of the article.
The Steve Jobs’ Last Words Hoax
This is the infamous Steve Jobs’ Last Words that have been shared by hundreds of thousands of people on social media and email chain letters.
Steve Jobs’ Last Words
I reached the pinnacle of success in the business world. In others’ eyes, my life is an epitome of success.
However, aside from work, I have little joy. In the end, wealth is only a fact of life that I am accustomed to.
At this moment, lying on the sick bed and recalling my whole life, I realize that all the recognition and wealth that I took so much pride in, have paled and become meaningless in the face of impending death.
In the darkness, I look at the green lights from the life supporting machines and hear the humming mechanical sounds, I can feel the breath of god of death drawing closer…
Now I know, when we have accumulated sufficient wealth to last our lifetime, we should pursue other matters that are unrelated to wealth…
Should be something that is more important: Perhaps relationships, perhaps art, perhaps a dream from younger days
Non-stop pursuing of wealth will only turn a person into a twisted being, just like me.
God gave us the senses to let us feel the love in everyone’s heart, not the illusions brought about by wealth.
The wealth I have won in my life I cannot bring with me. What I can bring is only the memories precipitated by love.
On the 30th of October 2011, the New York Times printed an eulogy by his sister, Mona Simpson. In that eulogy, she described his last moment :
Steve’s final words, hours earlier, were monosyllables, repeated three times.
Before embarking, he’d looked at his sister Patty, then for a long time at his children, then at his life’s partner, Laurene, and then over their shoulders past them.
Steve’s final words were:
OH WOW. OH WOW. OH WOW.
Steve Jobs Was Not On Artificial Respiration
The fake speech claims that Steve Jobs was on artificial respiration. That’s not true. Although his family has been very private about his final days, we do know that he was not being kept alive by a mechanical ventilator.
The intubation required would have prevented him from saying anything. If he was being kept alive by a mechanical ventilator, he wouldn’t be able to say “Oh wow. Oh wow. Oh wow.” as his sister revealed were his true last words.
In fact, on August 11, 2011 – less than two months before he died, Steve Jobs asked Tim Cook to visit him. As recounted in Tim Cook’s book – Becoming Steve Jobs, Steve Jobs was more than capable of talking lucidly even then :
He told me he had decided that I should be CEO. I thought then that he thought he was going to live a lot longer when he said this, because we got into a whole level of discussion about what would it mean for me to be CEO with him as a chairman. I asked him, ‘What do you really not want to do that you’re doing?’
“It was an interesting conversation,” Cook says, with a wistful laugh. “He says, ‘You make all the decisions.’ I go, ‘Wait. Let me ask you a question.’ I tried to pick something that would incite him. So I said, ‘You mean that if I review an ad and I like it, it should just run without your okay?’ And he laughed and said, ‘Well, I hope you’d at least ask me!’
I asked him two or three times, ‘Are you sure you want to do this?’ because I saw him getting better at that point in time. I went over there often during the week, and sometimes on the weekends. Every time I saw him he seemed to be getting better. He felt that way as well. Unfortunately, it didn’t work out that way.”
Finally, if he was really kept alive by a mechanical ventilator, it would have kept him alive. He wouldn’t have died of respiratory arrest, which was the immediate cause of death. The fact that he did indeed die of respiratory arrest is evidence that he was not on artificial respiration
Steve Jobs Did Not Die In A Hospital
Alternate versions of this fake speech refers to him being in a hospital bed. Steve Jobs died at home, not in a hospital. The New York Times noted :
In his final months, Mr. Jobs’s home — a large and comfortable but relatively modest brick house in a residential neighborhood — was surrounded by security guards. His driveway’s gate was flanked by two black S.U.V.’s.
We don’t have an exact date for when he was confined to his home for his last days, but we do know that by August 11, 2011, he was permanently at home :
“He said, ‘I want to talk to you about something,’ ” remembers Cook. “This was when he was home all the time, and I asked when, and he said, ‘Now.’”
None of the books written about him refers to these fake Last Words
He had an official biography written by Walter Isaacson (Steve Jobs, ISBN 978-1501127625). Walter Isaacson was given unprecedented access to his personal life, including over 40 interviews with Steve Jobs himself.
If Steve Jobs wanted to pass along such a message, he would have done it in that book. There is no mention of such a message in that biography.
The fake quote refers to God twice, which Steve would never do because he did not believe in God. He was a Zen Buddhist, not the Lutheran Christian he was brought up to be. Buddhism is a religion but their adherents do not believe in God or gods.
Unbelievably bad grammar
The fake quote is replete with bad grammar. That is something Steve Jobs would never condone, being the perfectionist that he was. Needless to say, the writing style was not his either.
Steve Jobs was not afraid of death, he made use of it
The fake quote framed Steve Jobs as regretting that he spent his life in the pursuit of success at the expense of his family. This cannot be further from the truth. Steve Jobs not only embraced his impending demise, he used it to spur him to make the most of his time left.
During his famous commencement speech at Stanford University in 2005, he said that “Death is very likely the single best invention of life“. He then expounded on using that knowledge that our impending deaths to spur ourselves to greater heights, and to do what we really want to do in life :
Your time is limited, so don’t waste it living someone else’s life. Don’t be trapped by dogma — which is living with the results of other people’s thinking. Don’t let the noise of others’ opinions drown out your own inner voice. And most important, have the courage to follow your heart and intuition. They somehow already know what you truly want to become. Everything else is secondary.
Steve Jobs did not pursue wealth, only his vision for Apple
The fake Steve Jobs’ Last Words allude to a mindless pursuit of wealth. However, this cannot be further from the truth, because Steve Jobs earned a cool annual salary of $1 since he returned to a struggling Apple in 1997.
He was not the only corporate executive to do this, of course, as they can be compensated through alternate means like bonuses, stock options, etc. Steve Jobs was notable, though, for not taking any alternative form of compensation since 2003.
He took virtually nothing in compensation for his time and effort at Apple because he was not pursuing wealth, but his vision. His wealth, and his position at Apple, were the means to the end, not the goal itself.
Help Stop This Fake Attribution
If you see this fake quote being shared, please DO NOT share it. Share this article with them instead.
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