Tableau-Desktop-Specialist reality - Tableau Desktop Specialist Updated: 2024
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Exam Code: Tableau-Desktop-Specialist Tableau Desktop Specialist reality January 2024 by Killexams.com team
Tableau-Desktop-Specialist Tableau Desktop Specialist
- test Name: Tableau Desktop Specialist
- test Code: Tableau-Desktop-Specialist
- test Duration: 2 hours
- test Format: Multiple-choice and multiple-answer questions
1. Connecting to Data
- Connecting to various data sources
- Managing data connections
- Data preparation and cleansing
2. Exploring and Analyzing Data
- Creating visualizations using different chart types
- Applying filters, groups, and sets
- Performing calculations and aggregations
3. Creating and Customizing Dashboards
- Building interactive dashboards
- Adding interactivity through actions and filters
- Designing effective layouts and navigation
4. Sharing and Publishing Content
- Sharing workbooks and dashboards with others
- Publishing to Tableau Server or Tableau Public
- Managing user access and permissions
5. Data Blending and Advanced Analytics
- Blending data from multiple sources
- Performing advanced analytics using calculations and table calculations
- Utilizing advanced features such as parameters and level of detail expressions
1. Connect to data from various sources and perform data preparation tasks.
2. Create visualizations using different chart types and apply filters, groups, and sets.
3. Build interactive dashboards with interactivity and effective design.
4. Share workbooks and dashboards with others and manage user access.
5. Blend data from multiple sources and perform advanced analytics using calculations.
6. Utilize advanced features such as parameters and level of detail expressions.
The test syllabus covers the following Topics (but is not limited to):
- Connecting to Data
- Exploring and Analyzing Data
- Creating and Customizing Dashboards
- Sharing and Publishing Content
- Data Blending and Advanced Analytics
|Tableau Desktop Specialist
Tableau Specialist reality
Other Tableau examsTDS-C01 Tableau Desktop Specialist
SCA-C01 Tableau Server Certified Associate
Tableau-Desktop-Specialist Tableau Desktop Specialist
TDA-C01 Tableau Certified Data Analyst
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Tableau-Desktop-Specialist Real Questions
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Tableau Desktop Specialist
In Tree maps, the size begins with the largest rectangle on the ________________ and the smallest rectangle on the
A. top left bottom left
B. top right, bottom right
C. top left, bottom right
D. top right, bottom left
Tree maps size begins from maximum in top left to smallest in bottom right.
See below to learn how to create a TreeMap and add colours to it:
When using a Blend, what is the color of tick-mark on the primary and secondary data sources respectively?
A. Red, Blue
B. Orange, Blue
C. Blue, Red
D. Blue, Orange
When using a Blend, the primary data source appears with a BLUE tick-mark and the secondary data source appears
with a ORANGE tick-mark.
Dates in Tableau are typically treated as ______________
For relational data sources, dates and times are automatically placed in the Dimensions area of the Data pane and are
identified by the date or date-time icon. For example, the Order Date and Ship Date dimensions from an Excel data
source are shown below:
When you place a relational date on a shelf, the field name is automatically modified to reflect the default date level.
Tableau defines the default date level to be the level at which there are multiple instances. For example, if the date
field includes multiple years, the default level is year. However, if the date field contains data for just one year but
includes multiple months, then the default level is month.
True or False: It is possible to change the Geographic Role of a dimension
Explanation A geographic role associates each value in a field with a latitude and longitude value. Assigning a
geographic role based on the type of location (such as state versus postcode) helps ensure that your data is plotted
correctly on your map view. For example, you can assign the City geographic role to a field that contains a list of city
names. To assign a geographic role to a field: In the Data pane, click the data type icon next to the field, select
Geographic Role, and then select the geographic role you want to assign to the field.
When you assign a geographic role to a field, Tableau adds two fields to the Measures area of the Data pane: Latitude
(generated) and Longitude (generated). These fields contain latitude and longitude values and are assigned the Latitude
and Longitude geographic roles. If you double-click each of these fields, Tableau adds them to the Columns and Rows
shelves and creates a map view using the Tableau background map.
To use a quick table calculation, which of the following programming languages do you need to know?
D. None of these
You dont need to know ANY programming language to use quick table calculations!
Follow along with the steps below to learn how to apply a quick table calculation to a visualization:
1) Open Tableau Desktop and connect to the Sample-Superstore data source, which comes with Tableau.
2) Navigate to a new worksheet.
3) From the Data pane, under Dimensions, drag Order Date to the Columns shelf.
4) From the Data pane, under Dimensions, drag State to the Rows shelf.
5) From the Data pane, under Measures, drag Sales to Text on the Marks Card.
6) From the Data pane, under Measures, drag Profit to Color on the Marks Card.
7) On the Marks card, click the Mark Type drop-down and select Square.
The visualization updates to look like this:
Apply the quick table calculation
1) On the Marks card, right-click SUM(Profit) and select Quick Table Calculation > Moving Average.
Note: You can only perform quick table calculations on measures in the view. A delta symbol appears on the field to
indicate that a quick table calculation is being applied to the field. The colors in the visualization update to show the
moving average of profit across the years.
How would you calculate GDP per capita in Tableau?
D. SUM([GDP]) / SUM([Population])
GDP / Population = GDP Per Capita
Here Sum is a function, / and + are operators. On the bottom there are comments.
Which of the following are the options to export the data used to build the view / visualisations?
A. CSV file
B. PDF File
C. JSON format
D. MS Access Database
You can export the data in a Tableau data source, including all or part of the records from
your original data. Alternatively, you can export only the portion of data used to generate the view. Since the question
mentions the data used to build the view, well focus on that :
*Export data in the view to Microsoft Access or .csv* Export the data that is used to generate the view as an Access
database (Windows only) or .csv file (Mac only).
1) In Tableau Desktop, select Worksheet > Export > Data.
2) Select a location and type a name for your Access database or .csv file.
3) Click Save.
4) If youre on Windows, the Export Data to Access dialog box displays to provide you the option to immediately use the
new Access database and continue working in Access without interrupting your work flow.
True or False:
The Highlighting action can be disabled for the entire workbook.
Yes, it is possible to disable highlighting for the entire workbook.
For more information: https://help.tableau.com/current/pro/desktop/engb/actions_highlight.htm
Using the cwurData table, create a cross-tab showing the number of Publications per Country broken down by
Institution, and filtered by Country to only show United Kingdown (UK).
For the University of Manchester, what percent of the total publications were contributed in 2014?
Phew! Tricky one for sure. This question tests multiple concepts and will help you revise them. Well be using filters,
as well as quick table calculations (percent of total) for this one.
1) Firstly, lets drag Country and Institution to the Rows shelf, and year (discrete) to the Columns shelf. Then,
drag Publications to the Text Icon in the Marks Shelf.
The following is our view:
Which of the following are benefits of using Data Extracts in Tableau?
A. Improved Performance
B. Ability to use the data offline
C. Working with freshest data at all times
D. Faster to work with
Explanation Extracts are advantageous for several reasons:
1) Supports large data sets: You can create extracts that contain billions of rows of data.
2) Fast to create: If youre working with large data sets, creating and working with extracts can be faster than working
with the original data.
3) Help Boost performance: When you interact with views that use extract data sources, you generally experience
better performance than when interacting with views based on connections to the original data.
4) Support additional functionality: Extracts allow you to take advantage of Tableau functionality thats not available
or supported by the original data, such as the ability to compute Count Distinct.
5) Provide offline access to your data: Extracts allow you to save and work with the data locally when the original data
is not available. For example, when you are traveling.
To work with the MOST up-do-date data, use a live connection instead!
True or False: A reference line cannot be added from the Analytics Pane
You can add a reference line to any continuous axis in the view. To add a reference line: Drag Reference Line from
the Analytics pane into the view. Tableau shows the possible destinations. The range of choices varies depending on
the type of item and the current view. In a simple case, the drop target area offers three options:
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Tableau is a popular business intelligence and data analytics tool renowned for transforming complex data into actionable insights. Used by a diverse range of industries, from healthcare to finance, Tableau empowers organizations to make data-driven decisions. Its intuitive interface and powerful visualization capabilities enable users to create compelling data stories, making it a preferred choice for professionals seeking to leverage data effectively.
Whether you are a seasoned data analyst or a business leader looking to harness the power of data, Tableau offers a suite of tools to meet a variety of analytical needs.
What is Tableau used for?
Tableau is widely used for reporting, data analysis and decision-making processes across departments in an organization. Its applications range from tracking key performance indicators to conducting in-depth market research and forecasting future trends.
As a flexible data visualization and business intelligence tool, Tableau allows users to connect to a variety of data sources â from simple spreadsheets to complex databases â and transform this data into interactive, visual dashboards and reports. With these visualizations, users can identify trends, patterns and insights that might not be obvious in raw data.
How do you use Tableau?
Using Tableau begins with connecting to your data source. Tableau is compatible with numerous data formats and sources, including Excel, cloud-based data and SQL databases. Once connected, you can use its drag-and-drop interface to create visualizations. You can choose from a variety of chart types, apply filters and use drill-down features to explore data in-depth.
SEE: Hereâs how to concatenate strings and numbers in Tableau.
Tableau also allows users to create dashboards that combine multiple visualizations, which provides a comprehensive view of the data. Sharing insights is straightforward with Tableauâs options to publish dashboards on Tableau Server or Tableau Online, enabling collaborative decision-making.
Is it easy to learn Tableau?
The ease of learning Tableau largely depends on oneâs background and experience with data analysis tools. For users who are familiar with data concepts and visualization principles, itâs relatively straightforward to start creating basic visualizations. However, mastering its more advanced features, like complex calculations and data modeling, may require additional time and practice.
Tableau offers a wealth of learning resources, including online tutorials, forums and training sessions, which can significantly ease the learning process. The active Tableau community also provides a supportive environment for beginners to learn and share knowledge.
Do I need to learn Excel or SQL before Tableau?
While prior knowledge of Excel or SQL is not a prerequisite for using Tableau, being familiar with these tools can enhance a userâs Tableau experience. Excel skills help users understand data organization and basic analysis, which are fundamental in Tableau. As for SQL, its knowledge is advantageous when working with large databases or performing complex data queries within Tableau.
SEE: Discover how to create or use a Top N filter in Tableau.
Still, Tableau is designed to be accessible to non-technical users, including those without a background in these programs, by providing various ways to manipulate and analyze data without needing advanced skills in Excel or SQL.
Key features of Tableau
While Tableauâs most prominent feature is its data visualization capabilities, its intuitive design and data processing and analytics capabilities make it a top choice for teams with varying levels of data experience. Some of these features include:
What is Tableau good for?
Tableau excels in transforming raw data into meaningful visualizations, making it an excellent tool for data-driven decision-making. Itâs particularly effective for businesses that need to analyze and interpret large datasets to unearth trends and patterns.
In addition, Tableau is great for creating comprehensive reports and dashboards, which paint a holistic picture of business performance. And Tableauâs real-time data processing capabilities mean that itâs great for scenarios like monitoring live financial markets or tracking operational metrics in real time that need immediate data analysis.
What is Tableau not good for?
For all its capabilities, Tableau has certain limitations. For one, itâs not primarily designed for detailed statistical analysis or advanced predictive modeling, which requires specialized statistical software. Tableau might need to be supplemented with other tools to achieve deep data manipulation.
Additionally, while Tableau can handle large datasets, extremely high volumes of data might require additional data preparation tools to optimize performance. And while its pricing is more affordable compared to competitors, Tableau may not be the most cost-effective solution for very small businesses or individual users who have limited data analysis needs, as its full suite of features might be underutilized in such scenarios.
Top Tableau integrations
Tableauâs wide variety of integrations can be categorized according to cloud services, customer relationship management systems, big data tools, business applications, spreadsheet tools and dashboard application integrations. Focusing on the dashboard applications, some of the integrations you can expect to find on Tableau dashboards include:
Tableauâs place in the BI and analytics software market
Tableau has established itself as a significant player in the business intelligence and analytics software market. With a market share of 15.09% in the business intelligence category, Tableau ranks highly among hundreds of competitors in this sector.
The acquisition of Tableau by Salesforce in 2019 for $15.7 billion marked a pivotal moment, further solidifying Tableauâs position in the market. This merger into the Salesforce ecosystem has enhanced Tableauâs capabilities, making it an even more powerful tool in the BI and analytics landscape. Tableauâs reputation as a top BI and analytics tool is well-earned, evidenced by its consistent ranking as a leader in Gartnerâs Magic Quadrant industry analysis every year since 2012.
Tableauâs main competitors
Looker and Tableau are both robust business intelligence tools. But which should you choose for your organization? Each solution will import data from multiple sources, provide in-depth BI analysis and produce rich data visualizations. However, Looker can provide more and ease-of-use functionality, whereas Tableau digs a little deeper into large and complex data sets.
The two products are highly rated BI software, frequently praised for their security, technical support and agility. Letâs compare Looker and Tableau to determine which would be best for your organization.
What is Looker?
Looker is a popular, easy-to-use BI analytics dashboard. Employees can create and share views to dig deeper into the performance of their organization. Looker is owned by Google and is offered at a monthly flat rate per company.
What is Tableau?
Tableau is a data visualization suite primarily used for business intelligence and analytics. Through Tableau, organizations can customize and optimize how they interact with their data. Tableau is currently owned by Salesforce and is offered as a monthly per-user subscription.
Employees per Company Size
Micro (0-49), Small (50-249), Medium (250-999), Large (1,000-4,999), Enterprise (5,000+)
Small (50-249 Employees), Medium (250-999 Employees), Large (1,000-4,999 Employees), Enterprise (5,000+ Employees) Small, Medium, Large, Enterprise
Dashboard, Real Time Analysis
3 Wyn Enterprise
Employees per Company Size
Micro (0-49), Small (50-249), Medium (250-999), Large (1,000-4,999), Enterprise (5,000+)
Small (50-249 Employees), Medium (250-999 Employees), Large (1,000-4,999 Employees), Enterprise (5,000+ Employees) Small, Medium, Large, Enterprise
Ad Hoc Analysis, Benchmarking, Collaboration Tools, and more
Looker vs. Tableau: Comparison table
Looker and Tableau pricing
Starting at $5,000 per month, Looker can be substantially more costly for smaller companies. As such, Looker is ideal for larger companies that want to remain scalable. By comparison, Tableauâs Creator solution starts at $70 per user, making it ideal for smaller businesses.
Looker pricing is determined by two main factors: the platform pricing cost to run a Looker instance and the user pricing cost for licensing individual users to access the Looker platform.
Looker offers three platform editions:
User license pricing is consistent across each edition.
Tableauâs Creator edition enables users to govern their solution, interact with the software, collaborate through the system and author works based on their datasets. In addition, Tableau offers its Explorer and Virtual editions with limited capabilities.
Feature comparison: Looker vs. Tableau
Looker vs. Tableau: Main features
Tableau imports structured and unstructured data to build elegant, human-readable visualizations. Looker likewise provides creatable dashboards with rich visualizations for imported data, which users then customize to suit their needs.
Both are full-featured BI tools that include these features:
Tableau provides advanced data analysis and visualization, but Looker leaves its options exposed and accessible.
Looker vs. Tableau: Performance
Modern companies are crunching increasingly large data sets. How do Looker and Tableau perform when given big data? In most circumstances, they will work with relatively equal effectiveness. Tableau is more effective with extensive data sets, while Looker is more effective than Tableau in a cloud-native environment.
Looker vs. Tableau: Analytics
Looker provides prebuilt, configurable code blocks. LookML, a proprietary SQL-like language, can be used to further interact with and analyze data. Tableauâs analytics solutions donât have this additional abstraction layer, making it more complicated to use but ultimately more configurable.
Looker vs. Tableau: Support
Looker and Tableau both have reliable service and support solutions. Looker leans heavily on online help centers and in-app chats. Tableau provides support through traditional venues, such as a weekday phone line and 24/7 emergency phone support. Both Looker and Tableau have active and vibrant communities and documentation.
Looker pros and cons
Pros of Looker
Cons of Looker
Tableau pros and cons
Pros of Tableau
Cons of Tableau
This is a technical review using compiled literature researched from relevant databases. The information provided within this article is gathered from vendor websites or based on an aggregate of user feedback to ensure a high-quality review.
Should your organization use Looker or Tableau?
Neither solution is necessarily better, but Tableau is more complex than Looker. Looker provides extensive user-friendly features, such as Looker Blocks, which make it easier to manage analytics views. However, Tableau offers more opportunities for advanced data analytics and management.
A few critical factors will go into deciding whether you want to use Looker or Tableau as your organizationâs go-to BI software.
If your organization wants a fast, easy-to-use system with beautiful data visualizations, Looker is the best option. If your organization is looking for deep data analytics or a cost-effective plan for a small number of people, Tableau is the better BI software.
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Your mind is very powerful. Yet, if you're like most people, you probably spend very little time reflecting on the way you think. After all, who thinks about thinking?
But, the way you think about yourself turns into your reality.
The Link Between Thoughts, Feelings And Behavior
Your thoughts are aÂ catalyst for self-perpetuating cycles. What you think directly influences how you feel and how you behave. So if you think youâre a failure, youâll feel like a failure. Then, youâll act like a failure, which reinforces your belief that you must be a failure.
I see this happen all the time in my therapy office. Someone will come in saying, âIâm just not good enough to advance in my career.â That assumption leads her to feel discouraged and causes her to put in less effort. That lack of effort prevents her from getting a promotion.
Or, someone will say, âIâm really socially awkward.â So when that individual goes to a social gathering, he stays to in the corner by himself. When no one speaks to him, it reinforces his belief that he must be socially awkward.
Your Beliefs Get Reinforced
Once you draw a conclusion about yourself, youâre likely to do two things; look for evidence that reinforces your belief and discount anything that runs contrary to your belief.
Someone who develops the belief that heâs a failure, for example, will view each mistake as proof that heâs not good enough. When he does succeed at something, heâll chalk it up to luck.
Consider for a minute that it might not be your lack of talent or lack of skills that are holding you back. Instead, it might be your beliefs that keep you from performing at your peak.
Creating a more positive outlook can lead to better outcomes. Thatâs not to say positive thoughts have magical powers. But optimistic thoughts Â lead to productive behavior, which increases your chances of a successful outcome.
Challenge Your Conclusions
Take a look at the labels youâve placed on yourself. Maybe youâve declared yourself incompetent. Or perhaps youâve decided youâre a bad leader.
Remind yourself that you donât have to allow those beliefs to restrict your potential. Just because you think something, doesnât make it true.
The good news is, you can change how you think. You can alter your perception and change your life. Here are two ways to challenge your beliefs:
âą Look for evidence to the contrary. Take note of any times when your beliefs werenât reinforced. Acknowledging exceptions to the rule will remind you that your belief isnât always true.
âą Challenge your beliefs.Â Perform behavioral experiments that test how true your beliefs really are. If you think youâre not good enough, do something that helps you to feel worthy. If youâve labeled yourself too wimpy to step outside of your comfort zone, force yourself to do something that feels a little uncomfortable.
With practice, you can train your brain to think differently. When you provide up those self-limiting beliefs, youâll be better equipped to reach your greatest potential.
"When I put in the earpieces and goggles the first time it was crazy - it feels so believable," says Anna Taylor, 32, of her visit to a virtual reality (VR) arcade.
"The whole experience of being immersed in a compelling virtual world is incredible."
Anna has since visited the east London arcade many times, at first alone and then with others. But despite her enthusiasm for gaming, she won't be buying her own virtual reality headset.
"I wouldn't invest in buying virtual reality applications for home," she explains. "It's fine to play more of a basic game when you are playing with other people, [and] because it's brand new there are more layers of excitement. But when you're [playing] on your own, you want the quality you are used to."
As a hurry gamer, Anna should be part of the core audience for at-home VR entertainment.
But her lack of interest is pretty common, and it means that virtual reality headsets have yet to take off.
Many big name adopters have abandoned their VR projects. Google recently halted sales of Daydream, its VR headset, admitting that "there just hasn't been the broad consumer or developer adoption we had hoped".
Meanwhile, the BBC has announced it is ending the funding for its VR hub, less than two years after it was founded.
And there were few big VR announcements at CES, the annual trade show for consumer electronics, which got underway this week.
However, PlayStation did announce it has sold five million VR headsets since launch in 2016.
However, one space in which virtual reality is thriving is group entertainment.
By its nature VR offers a gateway to a shared world, and in a group setting everyone gets change from ÂŁ20 rather than shelling out hundreds for a headset.
East London VR arcade Otherworld launched last year. It already sees 1,000 visitors a week through its doors, 60% of whom are female and half aged 25-34.
"Millennials are spending their income more and more on shared experience over consumption," says co-founder Chris Adams.
"Otherworld's immersion rooms provide the space and technology for a hyper-real, undisturbed journey into virtual reality which cannot be achieved at home."
Simon Windsor, who runs immersive media firm Hammerhead VR, has also largely kept away from the personal entertainment market.
"A few years ago there was an awful lot of hype around VR and some of that has not been fulfilled in terms of consumer adoption of the technology," Simon admits. "But the way you can interact with this world now is much more natural and intuitive."
Hammerhead uses VR to create a spectacle for big audiences in the worlds of entertainment, sport and business, alongside company training.
Simon helped create Madonna's hologram performance at the 2019 Billboard Music Awards and captured Anthony Joshua's boxing moves for Sky viewers, alongside providing training for companies like Pearson.
"Whether it's home game play, retail, virtual entertainment, a lot of the technology barriers have been removed," he says.
Because of its immersive nature, virtual reality is also increasingly used to encourage empathy or create unique experiences.
That could be anything from headsets for children to teach them about bullying, or enabling a care home resident to swim virtually with dolphins or explore their childhood home.
Some post-traumatic stress disorder sufferers saw an almost 40% improvement in their symptoms in a trial that involved walking on a treadmill in front of a screen projecting images of the type of trauma experienced.
Mainstream use of virtual reality in our homes and workplaces was probably one of the most popular technology predictions of the past half century.
Unlike flying cars or teleportation, virtual reality headsets have been in development since the late 1960s.
There was a wave of expectation around VR in 2016, seen by many tech watchers as the year virtual reality would go mainstream.
Despite these bursts of optimism, it has never quite broken through. Today, few own their own headsets or use virtual reality in their day-to-day work.
Consultancy CCS Insights estimates 10 million headsets will be in circulation worldwide by the end of 2019, 21% growth on the previous year.
But it acknowledges this "might seem disappointing considering the huge hype" around VR, with still just a handful of successful devices available.
A major issue is that the price of headsets has remained very expensive.
"I think VR remains a very niche technology," says James Gautrey, a portfolio manager at Schroders who specialises in analysing technology stocks.
"Mass adoption remains impeded by the hardware required to run it, in my opinion. Take videogames - you need a very powerful PC, a good amount of space, sensors set up around it, and of course the VR helmet itself.
"The cost runs to thousands and for most it is completely impractical not to mention too expensive.
"There are clearly benefits using it to train people where real life 'on the job' training is dangerous, such as pilots, surgeons, deep sea divers. But beyond that and specialist video gamers, I have not seen any compelling use cases that would make it more mainstream."
Tableau Training &Â Data VisualizationÂ in Philadelphia
Business analytics are increasingly the tool of choice for organizations seeking to leverage their data to provide insights and actionable knowledge for decision making. Tableau is the leading platform for business reporting and visualization that enables senior managers all the way along to service representatives to work productively with data. Our data visualization courses can help you learn Tableau, and master the basics and beyond to enhance your professional skillset and enhance your career.
One of the benefits to taking our Tableau training in Philadelphia is that learners receive one-on-one attention, right here on Drexel's campus or online. Our Tableau classes are designed and delivered by Drexel instructors who are actively working in the field.
Tableau Courses Current Offerings
Drexel Goodwin offers two Tableau training opportunities. Starting with our Tableau Essentials class we will navigate simple datasets and other foundational skills. Beyond the necessary fundamentals, weâll also be looking at how to use Tableau to solve complex business problems with our Advanced Tableau class. Regardless of your current level with Tableau and data visualization, these courses will provide you the skills necessary to enhance your career.Â
Tableau Essentials Class (DACE 5093)
Date: Friday, February 16 and Friday, February 23, 2024
Time: 9:00 a.m. - 4:00 p.m.
Â This 16-hour Tableau for beginners course provides a foundation in Tableau data visualization software. After the course, regardless of previous technical or analytical background, learners will be able to use Tableau to:
Advanced Tableau Training (DACE 5095)
Advanced Tableau is a data visualization course designedÂ for those who already have a solid working knowledge of Tableau. This course teaches learners to use Tableau for more complex data visualization, business reporting and analytics, extending abilities to build worksheets, dashboards and stories to more sophisticated capabilities, such as:
Why use Tableau to visualize your data?
Paying extra for exotic vitamins in skin creams that promise to erase fine lines and prevent wrinkles will get you little more than an empty wallet, according to dermatologists. Although many face creams contain vitamins known as antioxidants, very few are actually effective in preventing or reversing skin damage.
"Despite advertising claims, almost all available topical formulations contain very low concentrations of antioxidants that are not well absorbed by the skin," said Karen E. Burke, MD, in a presentation to the American Academy of Dermatology's annual meeting this week in New Orleans. "There are three antioxidants that have been proven to decrease the effect of the sun on the skin and actually prevent further damage: selenium, vitamin E, and vitamin C."
Antioxidants are known to prevent agents called free radicals from damaging cells in the body and the skin. Free radicals are a result of normal body processes, but they can also be created by exposure to various environmental factors such as smoking or ultraviolet (UV) radiation from the sun and can speed up the aging process.
Burke says the problem with applying antioxidants to the skin to fight aging is that they aren't very well absorbed or only have short-term effects. But new research presented at the dermatology conference suggests more effective formulations to deliver two of these antioxidants directly to the skin that needs it may soon be available.
The mineral selenium helps protect the body from cancers, including skin cancer caused by sun exposure. It also preserves tissue elasticity and slows down the aging and hardening of tissues associated with oxidation. Dietary sources of the mineral include whole grain cereals, seafood, garlic, and eggs.
Recent animal studies have found that when selenium is taken orally or through the skin in the form of L-selenomethionine, it provided protection against both everyday and excessive UV damage. A study also showed selenium also delayed the development of skin cancer in the animals.
Burke says those results are promising, but studies are still needed in humans.
Experts consider vitamin E to be the most important antioxidant because it protects cell membranes and prevents damages to enzymes associated with them. Natural sources of vitamin E include vegetable oils such as sunflower oil, grains, oats, nuts, and dairy products.
New laboratory studies suggest vitamin E helps inactivate free radicals, making them less likely to cause damage. Several other studies have shown applying vitamin E to the skin can reduce damage caused by sun exposure and limit the production of cancer-causing cells.
"For additional sun protection, individuals may consider taking vitamin E supplements," said Burke, in a release. "Supplementation with vitamin E in 400 milligrams a day has been noted to reduce photodamage, wrinkles and Boost skin texture."
Vitamin C is the most common antioxidant found in the skin. It's also found in vegetables and citrus fruits. Like vitamin E, vitamin C is considered important in repairing free radicals and preventing them from becoming cancerous or accelerating the aging process.
Since vitamin C is most prevalent in the skin, the skin is the organ that suffers most from environmental stressors. Smoking, sun exposure, and pollution rob the nutrient from our bodies, says Burke.
"Even minimal UV exposure can decrease the vitamin C levels in the skin by 30 percent, while exposure from the ozone of city pollution can decrease the level by 55 percent," said Burke in a release.
Creating a skin cream that carries a useful dose of vitamin C is difficult because it reacts immediately when exposed to oxygen. Several clinical trials examining more stable, effective formulations are currently under way.
Michael BublĂ© is opening up about a difficult time in his life.
On the "Diary of a CEO" podcast, Michael was asked by host Steven Bartlett about a time when he felt that his priorities shifted. This prompted BublĂ©Â to speak out about his oldest child Noah's cancer diagnosis.
"My son's cancer diagnosis rocked my world," BublĂ© said. "It pulled the curtain from over my eyes."
The musician continued, "And that was a sledgehammer to my reality. And I will never be carefree, and that's okay. It is a privilege for me to exist and that pain, the fear, the suffering that comes with those sort of things is, I guess it's part of that beautiful, this life."
Michael's son, Noah, was diagnosed with liver cancer in 2016. He was three years old at the time.
BublĂ© shared that he was focused on himself and his career goals prior to his son's diagnosis.
"I don't think I had my priorities straight. I mean, my family was always my love, but I don't think I was a terrible guy, but dude, it was blinders. Career. Ambition. How do I become the baddest, biggest, best. You know, more ego, more power, more money," he clarified.
BublĂ©Â continued, "And on Halloween, however many years ago that was, dude, it's like life was lived with a curtain in front of me. Like a filter. And the moment that they said this is what's happening, that reality hit me."
"Filter gone. And I mean, in a moment. In one moment. Gone. And I went, 'Ok. This is it. This is life. This is it, this is what's important,'" Michael concluded.
This is not the first time the singer has opened up about his son's cancer.Â
In 2021, BublĂ© told People magazine that since his son's diagnosis, he lives "a much deeper life now."
"I don't wish that kind of pain upon any human being, but I do feel that when you've truly suffered, when you've truly felt fear and loss, it allows you to live a deeper life," BublĂ© told the outlet. "Once you've felt those things, you are able, in context, to truly feel joy, gratitude and happiness."
He continued, "My grandpa used to say, 'Today's curse is tomorrow's blessing.' Even though for some of us who have lost so much these last few years, whether it's our jobs or our loved ones, it doesn't all come with negative connotations. There's always a silver lining to that cloud."
In October 2022, Michael was on Australia's Today Show when he said the diagnosis was "the worst possible thing that you could hear as a parent, and as maybe a human being."
"I much rather would have it have been me. Many times I wish that it had been," he added at the time.
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