Have you ever heard of Big Data or are you familiar with Data Scientists and Data Engineers? They are probably new job titles, but the core job roles have been around for a while. Traditionally, anyone who analyzed data would be called a “data analyst” and anyone who created backend platforms to support data analysis would be a “Business intelligence (BI) Developer”.
Here’s an overview of the roles of the Data Analyst, BI Developer, Data Scientist and Data Engineer.
Data Analysts are experienced data professionals in their organization who can question and process data, provide reports, summarize and visualize data. They have a strong understanding of how to influence existing tools and methods to solve a problem.
Skills: Data Analysts need to have a baseline understanding of some core skills: statistics, data munging, data visualization, exploratory data analysis, Tools: Microsoft Excel, SPSS, SPSS Modeler, SAS, SAS Miner, SQL, Microsoft Access, Tableau, SSAS.
Additionally, they work with databases, both relational and multidimensional, and should have great SQL development skills to integrate data from different resources. They use all of these skills to meet the enterprise-wide self-service needs. BI Developers are typically not expected to perform data analyses.
Data Engineers are the data professionals who prepare the “big data” infrastructure to be analyzed by Data Scientists.
They might also run some ETL (Extract, Transform and Load) on top of big datasets and create big data warehouses that can be used for reporting or analysis by data scientists.
A.In this case, the curious Data Scientist is expected to explore the data, come up with the right questions, and provide interesting findings! |
B.Business intelligence Developers are data experts that interact more closely with internal stakeholders to understand the reporting needs. |
C.With the emergence of big data, new roles began popping up in corporations and research centers -- namely, Data Scientists and Data Engineers. |
D.This is why it is essential to know computer science fundamentals and programming, including experience with languages and database (big/small) technologies. |
E.And they also help people from across the company understand specific questions with ad-hocreports and charts. |
F.They are software engineers who design, build, integrate data from various resources, and manage big data. |
相似题推荐
【推荐1】Many people believe that working to the maximum is the secret to success, but research has found that moderation(适度) also gets results on the job.
In a study led by Ellen Langer of Harvard University, researchers asked people to translate sentences into a new made-up language. Subjects who practiced the language moderately beforehand made fewer errors than those who practiced extensively or not at all. High levels of knowledge can make people too attached to traditional ways of viewing problems across fields the arts, sciences, and politics. High conscientiousness is related to lower job performance, especially in simple jobs where it doesn’t pay to be a perfectionist.
How long we stay on the clock and how we spend that time are under careful examination in many workplaces. The young banker who eats lunch at his desk is probably seen as a go-getter, while his colleagues who chat over a relaxed conference-room meal get dirty looks from the corner office. “People from cultures that value relationships more than ours does are shocked by the thought of eating alone in front of a computer”, says Art Markman, a professor of psychology at the University of Texas, Austin. Social interaction has been shown to lift mood(情绪) and get people thinking in new directions and in ways that could help improve any post-lunch effort.
Markman also promotes off-task time. “Part of being a good thinker is experiencing things that are seemingly unrelated to what you are working on at the moment but give you fresh ideas about your work,” he says. “Also, there is a lot of research showing that a positive mood leads to higher levels of productivity and creativity. So, when people do things to increase their life satisfaction, they also make themselves more effective at work.”
1. What does Ellen Langer’s study show?A.It is worthwhile to be a perfectionist | B.Translation makes people knowledgeable. |
C.Simpler jobs require greater caution. | D.Moderate effort produces the best result. |
A.is good at handling pressure | B.works hard to become successful |
C.a has a natural talent for his job. | D.gets on well with his co-workers |
A.A good thinker is able to inspire other people. |
B.Experience unrelated to your job is useless. |
C.A cheerful mood helps make a creative mind. |
D.Focusing on what you do raises productivity. |
A.Middle-of-the-road work habits. | B.Balance between work and family. |
C.Long-standing cultural traditions. | D.Harmony in the work environment. |
【推荐2】Richard is a very a successful businessman. It is common for him to work hard with a non-stop. He wasn’t aware that he might wear himself out or die an early death until he overslept one morning, which was a sort of alarm. And then what happened? He had a week’s leave during which time he read novels, listened to music and walked with his wife on a beach, which has enabled Richard to return to work again.
In our modern life, we have lost the rhythm between action and rest. Amazingly, within this world there is a universal but silly saying: “I am so busy.”
We say this to one another as if our tireless efforts were a talent by nature and an ability to successfully deal with stress. The busier we are, the more important we seem to ourselves and, we imagine, to others. To be unavailable to our friends and family, and to be unable to find time to relax — this has become the model of a successful life.
Because we do not rest, we lose our way. We miss the guide telling us where to go, the food providing us with strength, the quiet giving us wisdom.
How have we allowed this to happen? I believe it is this: we have forgotten the Sabbath, the day of the week — for followers of some religions — for rest and praying. It is a day when we are not supposed to work, a time when we devote ourselves to enjoying and celebrating what is beautiful. It is a good time to bless our children and loved ones, give thanks, share meals, walk and sleep. It is a time for us to take a rest, to put our work aside, trusting that there are larger forces at work taking care of the world.
Rest is s spiritual and biological need; however, in our strong ambition to be successful and care for our many responsibilities, we may feel terribly guilty when we take time to rest. The Sabbath gives us permission to stop work. In fact, “Remember the Sabbath” is more than simply permission to rest; it is a rule to obey and a principle to follow.
1. What’s the function of the paragraph 1?A.To tell us that Richard lives a healthy life. |
B.To bring up the topic of the passage. |
C.To give us a brief introduction of Richard |
D.To tell Richard is a successful businessman. |
A.a signal of stress | B.a warning of danger |
C.a sign of age | D.a spread of disease |
A.be able to work without stress | B.be more talented than other people |
C.be more important than anyone else | D.be busying working without time to rest |
A.Praying for our family. | B.Taking a good break. |
C.Only working for two hours. | D.Enjoying delicious meal. |
A.We should balance work with rest. |
B.The Sabbath gives us permission to rest. |
C.It is silly for anyone to say “I am busy.” |
D.We should be available to our family and friends. |
NEBOSH IGC
It is a known fact that gas and mining companies tend to encounter evident risks such as fire and chemical exposure. However, this does not mean that other industries are free of health and safety risks. Even those regarded as safe workplaces such as those in IT and education fields can threaten the health and safety of employees. For example, using a computer for more hours than normal can cause muscle problems, spinal cord(脊髓)issues, and tiredness. On the other hand, the employees in the business sector can face tremendous stress ——the modem main cause of several physical and psychological disorders. These facts prove that health and safety dangers exist in any industry. Therefore, it is vital to train the employees in occupational health and safety.
One such course that is designed for the workers of all industries is the NEBOSH IGC in Rawalpindi, Islamabad. Designed by the NEBOSH or National Examination Board in Occupational Safety and Health, the course has become the UK's criterion for health and safety measures. It is suitable for all professionals who need a fundamental understanding of safety and health concerns. A professional can choose to take this course either via an instructor-led classroom or via online e-Learning modules.
Classroom training is best for those who prefer face-to-face interaction for learning as well as for getting instant feedback from the instructors. These are the people who learn more effectively in the presence of a teacher.
However, most professionals are choosing the online e-Learning course for gaining the NEBOSH IGC in Islamabad, as it has proved more effective and convenient The biggest benefit of online learning is that it is the most flexible way to learn at any time and from anywhere, something that today's busy professionals can do despite their busy schedules.
Another benefit is that the online course is backed by 24/7 support. This helps you to get the desired assistance as well as feedback from online instructors even late at night or early in the morning. Further, because you can access the modules anytime through the Internet, the training happens at your own pace, which is required for effective learning. If you decide to take advantage of the training online, you can expect to invest around 75-80 hours in learning. There is truly no need to join a class or any institution for taking NEBOSH training courses in Rawalpindi, Islamabad. The online NEBOSH courses help you save time and energy while effectively learning the work-related health and safety basics.
NEBOSHIGC | |
Background | Almost all industries, gas and mining companies in subject to health and safety risks. Therefore, it is a(n) employees |
Typical examples | ★ ★Those in the business sector feel under great pressure, |
Characteristics of the NEBOSH IGC | The NEBOSH IGC has become a method of safety measures in the UK and suitable for all professionals in need of a basic understanding of safety and health concerns. |
★Classroom learning is a perfect choice for learners who like to interact face to face with their instructors and get immediate feedbacks. ★A(n) ★The online NEBOSH courses help them learn the work-related health and safely basics |
【推荐1】Your New Year’s plan to move more is one of the toughest to stick to, and a group of scientists working with obese(过度肥胖的) mice think they’re starting to understand why
Rather than our sedentary(久坐的) lives causing weight gain, says Alexxai Kraviz, the National Institutes of Health neuroscientist who led the study, changes in brain chemistry after we start gaining weight affect our capacity to move.
“Obses mice can move just fine,” says Kravitz, who published the work with his team in Cell Metabolism “They just don’t.”
What Kravitz’s team found is that the activity of a particular dopamine(多巴胺) receptor linked to movement goes down as mice gain weight on a high-fat diet. So the nice slow down and they move less. And when the researchers restored the activity of that dopamine receptor—DR2—the mice started moving more, even though they were still obese. The team also saw that lean mice missing the DR2 receptor acted like obese mice. This is the target, says Kravitz—restoring that dopamine receptor function. “Maybe 20 or 30 years down the road, we could do that in people,” he says.
And there is one more thing: The scientists fed normal mice and the mice lacking DR2 the same high-fat diet. Both sets of mice gained weight at the same rate.
Kravitz says this is important because mice lacking DR2 move less from the get-go, whereas a normal mouse takes a little time to start seeing that dopamine receptor-related loss of exercise. The ability to exercise seems to be disconnected from weight gain, he says.
“Exercise is a healthy thing to do, but its impact on weight loss has been exaggerated,” he says. “We have to be realistic about the size of the effect of exercise on weight, as opposed to health benefits.”
Still, before you abandon your New Year’s exercise plan, keep in mind that this study was done using a high-fat diet, and not the normal calorie restriction that people maintain when they diet.
That’s a big drawback to the work, says Vicki Vieira-Potter, a University of Missouri physiologist not involved in the study.
“They feed the mice with high-fat diet, it damages the receptor, and that decreases activity. Those who plan to lost weight should remember high-fat diet is a nice way to cause obesity in the lab, but it’s not the same as the normal situation of obesity,” she says.
Sine also says that a lot of the weight gain in the mice came after they stopped moving around, which indicates that the loss of movement did impact obesity.
1. Alexxai Kravitz is likely to agree that ________.A.high-fat food leads to the lack of DR2 |
B.less movement results from weight gain |
C.the lack of DR2 results in less movement |
D.weight gain leads to the inactivity of DR2. |
A.High-fat diet is bound to cause obesity. |
B.The research team aim to deal with human obesity. |
C.High-fat diet has little influence on the rate of weight gain. |
D.Obese mice’s ability to move is affected by the inactivity of DR2. |
A.underestimated | B.excluded | C.overlooked | D.overemphasized |
A.besides diet, other factors behind obesity shouldn’t be ignored in daily life |
B.the total loss of movement can do harm to the function of DR2 |
C.Alexxai Kravitz’s team misread the results of the research |
D.obesity is mainly caused by high-fat diet people take. |
【推荐2】Between adolescence and adulthood, you go through a host of changes-jobs, unpleasant haircuts and relationships that come and go. But what about who you really are? As you grow older,does your personality change?
Personality is the pattern of thoughts, feelings and behavior unique to a person. People tend to think of personality as fixed. But according to psychologists, that's not how it works. “Personality is a developmental phenomenon. It's not just something that you're stuck with and can't get over,” said Brent Roberts, a psychologist at the University of lllinois at Urbana-Champaign.
That's not to say that you're a different person each day you wake up. In the short term, change can be nearly imperceptible, Roberts told Live Science. Regular surveys on the personalities of participants over many years suggest that our personality is actually stable on shorter time scales.
We come into the world with unique temperaments (性情),and research suggests that our temperaments as children-for example, whether we're easy-going or unwilling to approach strangers-correspond to adult personalities.
Throughout the years, our personality is still changing, but slowly, Roberts said. “It's subtle. You don't notice it on that five-to-ten-year time scale, but in the long term, it becomes apparent, ” he added. Psychologists also pointed out that personality tends to get “better” over time. They call it “the maturity (成熟) principle. ” People become more outgoing, emotionally stable and agreeable as they grow older. Over the long run, these changes are often apparent.
Some individuals might change less than others, but in general, the maturity principle applies to everyone. That makes personality change even harder to recognize in ourselves-how your personality compares with that of your peers doesn't change as much as our overall change in personality, because everyone else is changing right along with you. “There's good evidence that the average self-control of a 30- year-old is higher than a 20-year-old, "Donnellan said. ” At the same time, people who are relatively self- controlled at 18 also tend to be relatively self-controlled at age 30. "
1. Which of the following can be learnt from the passage?A.People's personality usually remains unchanged in the long run. |
B.People tend to be better balanced emotionally when they get older. |
C.People experience apparent changes in personality every five to ten years. |
D.People's temperaments as children have little to do with adult personalities. |
A.Unnoticeable. |
B.Unchangeable. |
C.Impossible. |
D.Incredible. |
A.Kids and Teens |
B.Fitness and Health |
C.World Culture |
D.Scientific American |
注意:请将答案写在答题卡上相应题号的横线上。每个空格只填一个单词。
Orchids’ Secret
Orchids (兰花) are some of the most rare and delicate species in all of nature. For hundreds of years orchids have been prized discoveries of collectors and adventurers hoping to find new and diverse kinds of the flower. “Orchid hunters” went looking for the mysterious orchids and brought back new types to sell. However, many of them met with tragedy instead. Dozens of hunters were killed by accidents or diseases or murder. Others became food for horrible creatures.
While the plants have long been valued for their beauty, they may be even more important to science and our understanding of co-evolution. Unlike plants that can self-pollinate (自我授粉), orchids need very specific insects or birds to spread their pollen. The process by which insects, the wind, or birds spread the pollen of different flowers is called pollination. Pollen is a powder produced by plants that contains their genetic material. In order for the plants to reproduce, the pollen must be physically moved to the flower’s stigma (花的柱头), which contains an egg. Now the fertilized egg can become a seed. Birds and insects can pollinate plants by touching many different flowers and spreading the pollen around.
Orchids evolved to attract insects and birds. Because there are many different species of orchid, there are also many different ways the orchids attract their pollinators. Orlean explains that “many species look so much like their favorite insects that an insect mistakes them for its relatives, and when it lands on the flower to visit, pollen sticks to its body. Another orchid imitates the shape of something that a pollinating insect likes to kill... Other species look like the mate of their pollinator, so the bug tries to mate with one orchid and then another… and spreads pollen from flower to flower each hopeless time.”
Other orchids don’t use their shape at all, but rather produce specialized smells to attract specific insects, such as bees, beetles or flies. Some orchids smell like cake, some like chocolate, and some like rotting meat. All these smells may seem weird, but they exist to attract creatures to their pollen and help the orchids survive.
Orchids provide new angles for the research into plant and animal evolution on the earth. The strategies to attract insects and spread their flowers’ pollen go on and on. Each family of orchids has a unique kind of insect or bird that visits their flowers, as well as its own way of attracting them. It has worked, too. Orchid species number more than 25,000 worldwide, which is more kinds of species than any other flower on the planet, and new ones are still being found.
Orchids and the insects that pollinate them are one of the most amazing examples of evolution. By tricking the insects that collect its pollen, the orchid has survived since the time of the dinosaurs.
Main points | Supporting details |
Orchids are rare and delicate. | ● Orchid hunters consider their discovery of great ● Many orchid hunters |
Different types of orchids have different ways to spread pollen. | Pollination is a process where the pollen, containing the genetic material of the plant, is carried to the stigma of the flower, so that the plant can ● Some species attract insects to land on their flowers with ● Some species ● Some species ● |
The importance of the | Orchids and the insects that pollinate them are one of the most amazing examples. ● Orchids have the ● Nature has witnessed the |