Share! NYC principal says Trump presidency is 'more troubling' than 9/11

The principal at a progressive Manhattan private school told parents in an email last week that the Trump presidency was more troubling than Vietnam, the assassination of Martin Luther King Jr., the September 11 attacks and Watergate, The Post has learned.

Steve Nelson’s scorching missive managed to roil several parents at the $46,000 per year Calhoun School – no small feat considering the Upper West Side bastion’s blaring liberal bent.
“It was inappropriate, it was offensive, it was condescending,” said one parent. “This is a liberal school. So I guess that’s the approach. But this was too much. To compare this to 9-11 – I think that’s just too much.”
Nelson emailed a series of anguished ruminations on Donald Trump’s ascent to Calhoun parents, simultaneously calling for non-partisanship while skewering the billionaire’s policies.
In a message sent last week, Nelson, who also teaches journalism at the pre-K through 12 campus, noted his intimate familiarity with several recent catastrophes – including 9-11.
“I watched soot-covered New Yorkers grimly trudging north on West End Avenue on September 11, 2001,” Nelson wrote. “I am more troubled now.”
Elsewhere in the lengthy missive, Nelson acknowledged the theoretical need to avoid political bias in a school environment. “One in my position must be scrupulous in avoiding partisanship,” he said.
But he later asserted in the same message that “there are matters that transcend political diversity.”
“The ways in which equity and equality are now threatened are deeply troubling, including the constitutionally suspect and arguably discriminatory efforts to restrict or prohibit immigration based on religion and/or ethnicity,” he wrote.

the UAV can easily be used by the vast majority of enterprises

DJI has introduced technological innovations into the popular Phantom series of existing UAVs and has become the mainstream. Today, the latest UAV model not only improves the stability of the gyroscope, the flight time is three times before, but the cost is only 1,000 US dollars.

In short, regardless of its cost or hardware, make the UAV can easily be used by the vast majority of enterprises. The turning point, however, is that the Federal Aviation Administration (FAA) passed the Part 107 Act in June this year, and now anyone with a web-based license can operate a commercial unmanned aerial vehicle, previously only available to a driver's license, And high, operation and laborious.

The current mainstream business applications for UAVs increasingly widespread, but the layman is difficult to touch the doorway. Intel has just released a design for industrial design of unmanned aerial vehicles, such as can be used for construction sites or field survey; oil and gas companies to ensure drilling safety and maintenance of unmanned aerial vehicles; and Amazon also tried to unmanned aerial vehicles Delivery business.

Companies that sell seed to the agricultural market provide the farmer with unmanned aerial vehicles free of charge and train them to take care of the crops with unmanned aircraft. UPS recently used unmanned aerial vehicles to deliver drugs to an island near Boston. I have recently talked to a company that has drawn maps of the freeways in Mexico and identified the roads that need to be patched. Previously, the satellite image pixel is not clear enough, while the car image rendering and takes a long time, but the UAV can be completed within a few days of this project.

UAVs can also be widely used in other areas, whether insurance companies assess the loss of crops due to hail, or the city used to detect heavy rainfall during the groundwater level.

The emerging DJI enterprise market creates an ecosystem to support its own development. UAVs have emerged as consultants for companies that require unmanned aerial vehicles (UAVs) or unmanned aerial vehicles (UAVs) and can be seen as Uber in unmanned aerial vehicles (UAVs). For example, companies can contract with UAV operators to perform remote device tests without having to take the risk of overhauling or hiring full-time staff to do the job.

DJI is undoubtedly the most successful enterprise in China's technology industry in recent years

DJI is undoubtedly the most successful enterprise in China's technology industry in recent years, because it is a native Chinese brand, but in the years to grow into the world's first civilian UAV brand, and even defeated, including 3D Robotics US companies (3D Robotics has switched to do the software).

After all, almost all foreign companies have core technologies and resources (such as Android systems, processors, etc.) in many areas, such as smart phones, PCs, software, games, etc., China's DJI to do the world's first It is not easy. Such as the latest "Royal" Mavic Pro unmanned aerial vehicles, almost won the foreign media unanimously spoke highly of the continent itself represents the concept of continuous innovation.

Mavic Pro first innovation is that it can be folded. In fact, this feature changes the general UAV use patterns. Although you may be in the variety show often see UAV aerial photography, but for ordinary consumers, to spend more than 5,000 yuan to buy a portable "toy", in fact, still some difficulties. Obviously, the foldable Mavic Pro alleviates this problem to some extent.

Second, Mavic Pro to keep the portable folding design, but also the largest integrated high-end technology, such as 4K camera, object tracking, a wide range of connection distance, etc., the price is relatively reasonable.

Currently, the only direct competitor on the market with Mavic Pro is GoPro's Karma, which does not recall the Mavic Pro because of its failure.

Phantom 4 has not been killed, but also upgraded to Pro version

Phantom 4 Pro one of the biggest bright spot is the life time will be slightly elevated to about 30 minutes at the same time, greatly enhanced the perception.

In addition to the normal version of the front binocular obstacle avoidance camera, the Phantom 4 Pro behind the addition of another set of binocular obstacle avoidance camera. The right and left sides of the fuselage, Pro 4 Pro equipped with infrared sensors, in novice mode, tripod  mode, left and right sides of the perception of obstacles, the effective detection range of 7 meters, the sensing range of 70 ° horizontal, vertical 20 ° Of the cone shape.

In addition to obstacle avoidance, the front, rear and the fuselage at the bottom of a total of 6 cameras in the phantom 4 Pro composed of a six-head navigation system, even in the absence of GPS environment can accurately hover fixed height. The vision system can sense obstacles up to 30 meters, but only in the less than 50KM / H speed obstacle avoidance, and requires adequate lighting conditions.

Phantom 4 Pro has been equipped with the Mavic Pro  Flight Autonomy technology. 6 vision sensors, main camera, 2 infrared sensors, 1 ultrasonic sensor, GPS / GLONASS dual mode satellite positioning system, IMU and compass dual redundant sensors, can help the Phantom 4 Pro in flight to obtain real-time image, depth, And other information, to build a 3D map around the aircraft and to determine their own location.

Inspire 2 Powerful to overspeed flight performance

Although the Inspire 2 includes two batteries, the camera does not install the weight of up to 3.29 kg, larger and heavier than the Inspire 1, but this does not affect its output amazing power. Inspire 2 maximum level of flight speed of up to 108 KM / H, but this time binocular obstacle avoidance function does not work. Inspire 2 Zen X4S equipped with the maximum flying time of up to 27 minutes, while the Inspire 1's flying time is only about 15 minutes.

In short, the DJI in improving the Inspire 2 weight, but also further enhance its battery life.

Longer battery life and more powerful motor power means that a battery can not meet the Inspire 2 "appetite." The Inspire 2 requires two TB50 smart flying batteries with an energy of 97.58 Wh and a voltage of 22.8 V. Dahl has developed a dual battery redundancy system for the Inspire 2, and even if one of the batteries fails, another battery will be able to safely fly and return as long as the other battery is fully charged.

In addition to more powerful overall performance, the DJI also for some special environment flight development of the new features and accessories:

Smart battery low-temperature self-heating function, can ensure that the battery at minus 20 degrees Celsius can also maintain good condition, to know the low temperature environment caused by the voltage drop, but pit a lot of photographers;

Optional high altitude paddle to ensure that the aircraft in the highlands of up to 5000 meters can also be normal flight;