2 . Improve Cloud Security

Sensitive customer data has constantly been found exposed on cloud servers without password protection. To ease the problem, database software makers have been trying to make security easier for cloud database managers. At the Enigma Conference in San Francisco, Kenn White, a security manager at database software maker MongoDB, will describe a new technique, called field level encryption, to make data safer on the cloud.

Field level encryption works by scrambling data before it’s sent to a cloud database and rearranging it in order when the data is needed for use. The promise of the product is to protect the contents of a cloud database, even if bad guys access it.

MongoDB’s new feature comes as more and more companies move user data to cloud servers, rather than run their own costly data centers. It was predicted that cloud computing would be a $214 billion industry by the end of 2019. That would be up more than 17% from 2018, when it was $182 billion.

Companies have rushed to the cloud without understanding all of the possible security consequences. Many companies have left countless databases exposed, revealing personal data. A database containing details about who lives in 80 million US households was left unprotected in 2019, just like the data on Facebook users.

Database managers want to store their data in an unreadable form, but they also want to be able to find specific pieces of information in the database with a simple search term. For example, someone might want to look up health care patients by their Social Security numbers, even if those numbers are stored as random characters. To make this possible, field level encryption lets database managers encrypt a search term on their machine and send it to the database as a query. The database matches the encrypted version of the search term with the record it’s storing and then sends it back to you.

This approach only works with specific kinds of data. For example, field level encryption isn’t useful for long text entries, like notes in a patient’s medical chart, because you can’t search for individual words.

Still, for data like account numbers, passwords and government ID numbers, field level encryption protects data and maintains a usable database.

Most importantly, White said, it’s simple to set up. Database managers turn it on with a one-time configuration change when they set up the database. “That’s really powerful,” he said in an interview.

3 . Most solar panels acquire sunlight from only one side, meaning they can acquire more or less of it depending on where the sun is in the sky. In recent years, they’ve become far more effective typically turning around 22 percent of the light they acquire into energy. In a new study published in the journal Joule on Tuesday, scientists put forth a way to increase that percentage even higher: double-sided solar panels that can move to follow the sun.

Basically, these panels can acquire sun from not only their sun-facing side but also from the light reflected off the ground onto their dark undersides. At the same time, a GPS allows them to move on an axis from east to west in order to always be pointed at a best angle to acquire the sun’s rays. Though double-sided solar panels and sun-following solar panels are both in use currently, models that combine the two technologies aren’t widely available for commercial use, Solar experts predict explosive growth in the market soon, though.

The study authors determined that these two-sided sun-tracking panels produce an average of 35 percent more energy than immobile single-panel systems, and are 16 percent more cost-efficient. That holds true even when accounting for changes in weather conditions.

“This means that investing in double-sided and tracking systems should be a safe bet for the foreseeable future, Carlos Rodriguez-Gallegos,” the study’s lead author said.

The same warnings for solar panels and their effect on the local environment apply to the double-sided, moving systems as well, if not more so. Lead used in solar panels can be one source of local pollution, and Dustin Mulvaney, an associate professor of environmental studies, told Earther in an email double-sided panels could mean “twice as much lead” as traditional solar systems.

Since these new panels are more energy efficient, they could save not only money but also land. That would require restructuring how solar contracts currently work.

4 . Have you ever loved a destination but couldn’t figure out why — or even a way ——to express your feelings? That’s my dilemma with Morocco.

In August, I traveled in a country that had long been, on my wish list. I rode a camel, got lost in Medinas, and ate more couscous (粗麦粉) than was humanly possible.

I loved the trip. Our friendly guide introduced us to the helpful locals. I made friends with my tour mates and my roommate (which, on a tour, is a huge blessing). I loved being lost in the smell of different spices, and the chaos of millions of people and the dark red of the Sahara were all I wanted them to be.

There were many moments when I felt like a fish out of water and things didn’t go my way. But I take pleasure in those moments because it’s when you are pushed out of your comfort zone that you grow. Morocco lived up to all my expectations, but for some reason, my experience has been hard to express. Why?

One constant in my travels is that of a touchstone, one defining point where the trip all comes together and acts as a prism (三棱镜) for everything the journey represented . In Costa Rica，it was getting lost in a jungle. In Thailand, it was meeting those five people who changed my life.

I’m so inconsistent about Morocco because I lack that touchstone. There’s no “whoa” moment. But I have thousands of little ones - staring at a million stars in the blackness of the desert, discovering new foods with some amazing Australians on my tour, and befriending the fish sellers.

5 . An 85-year-old primary school constructed in 1935 in Shanghai has been lifted off the ground in its entirety and relocated using new technology called the “walking machine.” The project marks the first time this “walking machine” method has been used in Shanghai to relocate a historical building.

Urbanization（都市化）has continued to significantly threaten architectural heritage. In the capital Beijing, for instance, more than 1,000 acres of its historic hutongs and traditional courtyard homes were destroyed between 1990 and 2010.

In the early 2000s, cities including Nanjing and Bejjing-due to the critics’ protest about the loss of old neighborhoods-drew up long-term plans to preserve what was left of their historic sites, with protections introduced to safeguard buildings and restrict developers.

These conservation efforts have taken different forms. In Beijing, a near-ruined temple was transformed into a restaurant and gallery, while in Nanjing, a cinema from the 1930s was restored to its original form, with some additions providing it for modern use. In 2019, Shanghai welcomed Tank Shanghai, an arts center built in renovated（重修的）oil tanks.

“Relocation is not the first choice, but better than destroying,” said Lan, the Shanghai primary school’s project supervisor. “I’d rather not touch the historical buildings at all.” Building relocations he said however, are “a workable option.” “The central government is putting more emphasis on the protection of historical buildings. I’m happy to see that progress in recent years.”

Shanghai has arguably been China’s most progressive city when it comes to heritage preservation. The survival of a number of 1930s buildings and 19th-century “shikumen” （or “stone gate”） house have offered examples of how to give old buildings new life.

“We have to preserve the historical building no matter what, ” Lan said. “The relocation has challenges, but in general, it is cheaper than destroying and then rebuilding something in a new location.”

6 . Best Mexican Festivals to Attend

The country of Mexico has more to offer besides its beauty and the following festivities prove that well. Take a look at them and save your dates because you definitely can't afford to miss them.

Día de Muertos

Día de Muertos is a celebration of life! November l and 2 are important. While the l st is dedicated(专用的) to children and is called the”Day of the Innocents”, the second is dedicated to the people who have passed away. Graves are decorated with flowers, feasts are prepared, and families come together to remember their loved ones.

Date: 1st- 2nd November

Where: All over Latin America

Día de la Independencia

Día de la Independencia is the day when the entire country celebrates the start of Mexico's war of independence. Today, a couple of weeks are celebrated with artists putting up shows and exhibitions, Mexican music filling the streets, and even some costume parties!

Date: 16th September

Where: Mexico

Guelaguetza Festival

A spectacular vision of art, dance, and music, the annual celebrations of Guelaguetza are . a wonderful cultural experience， especially for tourists. Since the tickets to this festival's cultural program are sold in advance, you can plan a trip around this event.

Date: 22nd-27th July

Where: Oaxaca，Mexico

Día de la Virgen de Guadalupe

As the legend goes, Virgin Mary appeared in front of Juan Diego, one of the most loved patron(守护神) saints of Mexico. The apparition(神秘的现象) occurred in Mexico City and a church has been built at that spot. The religious festival of Día de la Virgen de Guadalupe pays respect to this event. The story goes forward and mentions a few relics too. This also makes it one of the most religiously significant monuments.

Date: 12th- 13th December

Where: Mexico City

10 . Online Book Shop

The books listed here are reasonably cheap and also after discount they are even cheaper.