From: Lee Haojie

Subject: Handheld Scanners

    Ms. Hu, I received the parcel from Scan Technology 1 piece. The scanner model they sent is correct, and the quantity is right. However, I've discovered the cables and connectors are all wrong. They are not suitable for the model 8021101.

    Can you do me a small favor and go through the product information website and see if the cables and connectors are still compatible (兼容的）with the 8021101 scanners? I have no wish to unpack the cables and connectors and try connecting them to the scanners. I believe we will have problem asking for an exchange if the cables and connectors are not compatible. If the website suggests an incompatibility, please contact Dan Richman and request an exchange for the collect model. (Refer to the invoice for his e-mail address.)

    I will only use the scanners for our project once we have resolved the exchange issue. We should not proceed unless we get confirmation (证实）on their compatibility. I am looking to resolve this in the shortest possible time as it would be disastrous to wait for this exchange without making progress on the project.

Haojie

    Tom goes everywhere with Catherine Green, a 54-year-old secretary. He moves around her office at work and goes shopping with her. "Most people don't seem to mind Tom," says Catherine, who thinks he is wonderful. "He's my fourth child," she says. She may think of him and treat him that way as her son, buying his food, paying his health bills and his taxes, but in fact Tom is a dog.

    Catherine and Tom live in Sweden, a country where everyone is expected to lead an orderly life according to rules laid down by the government, which also provides a high level of care for its people. This level of care costs money.

    People in Sweden pay taxes on everything, so aren't surprised to find that owning a dog means yet more taxes. Some people are paying as much as 500 Swedish kronor in taxes a year for the right to keep their dog, money that is spent by the government on dog hospitals and sometimes medical treatment for a dog that falls ill. However, most such treatment is expensive, so owners often decide to offer health and even life premium for their dog.

    In Sweden dog owners must pay for any damage their dog does. A Swedish Kennel Club official explains what this means: if your dog runs out on the road and gets hit by a passing car you, as the owner, have to pay for any damage done to the car, even if your dog has been killed in the accident.

    Some of the best research on daily experience is rooted in rates of positive and negative interactions, which has proved that being blindly positive or negative can cause others to be frustrated or annoyed or to simply tune out.

    Over the last two decades, scientists have made remarkable predictions simply by watching people interact with one another and then scoring the conversations based on the rate of positive and negative interactions. Researchers have used the findings to predict everything from the likelihood that a couple will divorce to the chances of a work team with high customer satisfaction and productivity levels.

    More recent research helps explain why these brief exchanges matter so much. When you experience negative emotions as a result of criticism or rejection, for example, your body produces higher levels of the stress hormone, which shuts down much of your thinking and activates (激活) conflict and defense mechanisms (机制). You assume that situations are worse than they actually are.

    When you experience a positive interaction, it activates a very different response. Positive exchanges increase your body's production of oxytocin, a feel-good that increases your ability to communicate with, cooperate with and trust others. But the effects of a positive occurrence are less dramatic and lasting than they are for a negative one.

    We need at least three to five positive interactions to outweigh every one negative exchange. Bad moments simply outweigh good ones. Whether you're having a conversation, keep this simple short cut in mind: At least 80 percent of your conversations should be focused on what's going right.

    Workplaces, for example, often see this. During performance reviews, managers routinely spend 80 percent of their time on weaknesses and “areas for improvement”. They spend roughly 20 percent of the time on strengths and positive aspects. Any time you have discussions with a person or group, spend the vast majority of the time talking about what is working, and use the remaining time to address weaknesses.

Should You Become a Full Stack Web Developer?

    Should you become a full stack web developer? What courses should you take to prepare you for the job? Our courses bring you a step-by-step path that will help you become a qualified candidate and teach you everything you need to know to succeed. Read on to discover if it's the right path for you:

    What is a Full Stack Web Developer?

    A full stack web developer is well skilled in both front and back-end web developing. With knowledge of what it means to build applications from start to finish, a full stack developer can plan, manage, and build software with general know-how. A core difference between front and back-end developers is that front-end developers handle building the user interface aspect of a website, while back-end developers deal with internal tasks such as web servers, applications, and databases.

    Combined, they are responsible for building the technology and coding that makes a website function properly. Both skillsets are crucial for being a well-rounded web developer and will give you a leg up when applying for jobs. If you like to learn new concepts and technologies frequently this is an excellent career path for you.

    Demand for Full Stack Web Developers is Growing

    Because of the broad range of skills required to be a full stack web developer, there are fewer candidates applying for positions, leaving more opportunity for qualified candidates. The job outlook for web developers is estimated to grow 13% by 2026, which is faster than the average rate for all occupations. With an impressive resume, full stack web developers can make $87,661 on average.

    Get Started Today

    With the help of the course, you will learn everything you need to know to succeed as a full stack web developer. You can start from any level with little to no previous experience required and track your progress as you go.

    Here's What You'll Learn in the Courses

    Build web applications and develop on both the front-end and back-end stacks

Learn Ruby on Rails, HTML, CSS, and JavaScript

    Develop web applications in Javascript using front-end framework, Angular, and hybrid mobile applications with Apache Cordova

    Design RESTful Ruby on Rails web applications with MongoDB database integration.

    On a recent spring morning. Susan Alexander, a retired government intelligence analyst, left her Maryland home, climbed into her Volkswagen Passat and drove about three miles to pick up two strangers. She battled rush-hour traffic on the Capital Beltway and George Washington Memorial Parkway before dropping them off at Reagan National Airport. She didn't earn a cent for her trouble, and that was the point.

    Alexander is a member of the Silver Spring Time Bank-one of more than 100 such exchanges around the world trying to build community by exchanging time credits for services instead of dollars and cents. "I have time," she said. "I like giving the gift of time to other people."

    In Alexander's case, passengers Mary and Al Liepold were grateful for the ride, but it wasn't charity. Mary, a retired writer and editor for nonprofit organizations, used time credits she banked for editing work and baking. Senior citizens who don't drive, the Liepolds cashed in their credits to catch a flight to Montreal for a five-day vacation.

    Without money changing hands or shifting between virtual accounts, the airport drop-off was more like a coffee party than a taxi ride. Driver and passengers chatted about projects they've completed for the time bank, and no one raised an eyebrow when Mary said she likes "to avoid the conventional economy."

    "The beauty of this is that you make friends," Mary Liepold said. "You don't just get services."

    The Silver Spring Time Bank formed in 2015 and has about 300 members, said co-founder Mary Murphy. Last year, she said, l,000 hours were exchanged for basic home repairs, dog walking, cooking and tailoring, among other services, without the exchange of money. "You get to save that money that you would have spent," she said. "You get to meet somebody else in your community and get to know that person. That's a bonus that's part of an exchange."

    A deal performed partly to make friends would seem to go against classical economics and one of Benjamin Franklin's most memorable sayings: "Time is money." To those at the forefront of modem time-banking, that is the appeal.

Father's Day is celebrated today in 75 countries around the world. In my personal world, it's a day I like to think of my father's father.

I learned a lot in my later life from my dad. But I learned something else, as a kid not even yet in school, from my grandfather. I learned to be curious. Little things fathers and grandfathers do can change the life of a child forever. In my case, this change came from necessity：My mom needed someone to look after little Allen, barely 4 years old, during the school day. My grandmother volunteered, and my grandfather came up with a way I could be watched while he worked in his clockmaker's shop.

He seated me on a chair every day while I was there, right in front of his big workbench.  He told me stories. He had a great sense of humor and a funny way of making a "buh﹣buh﹣buh" sound when he sensed my attention was weakening, and he encouraged me to ask questions about anything he was doing.

Naturally, I was usually asking questions about clocks﹣what made the hands move, what the pendulum (钟摆) did, why you had to stop winding just before the weight hit the stop.  Sometimes I just asked about which shiny parts went where.

Most of all, he showed me how clocks worked. He treated me as if I were a sort of small grown﹣up. He never talked down to me, never told me I was "too young to understand".

And so my grandfather granted me two things: A love of clocks, and an everlasting curiosity.

As a journalist, I turned that fascination into explanations of why computers and software do what they do﹣﹣and, perhaps even more importantly, why they fail at that task. I haven't been afraid of opening up the innards and looking for what is wrong with the computer.