Meanwhile, there is an inexhaustible source of energy, which is solar energy, which is being used in many constructions serving human life. The use of hot water by solar energy has also been implemented, but in unstable weather areas such as central provinces, especially Quang Binh, it is difficult to apply solar energy to generate electricity. Year-round hot water for daily living. Two children Dinh Thi Kim Oanh and Kaohsiung Cuong with the structural diagram of a solar water heater product. To solve this problem, Dinh Thi Kim Oanh, a student of class 12B and Kaohsiung Cuong, a student of class 12A, Trung Hoa Middle School and High School together with teacher Dinh Ngoc Trai researched and manufactured ordinary products. hot water by combining a solar water heater with an electric water heater. The principle of operation of this device is: the output of the solar water heater will be put through the inlet of the electric water heater, the output of the electric water heater will be brought down to the faucet. to use. The electricity supplied to the electric water heater is controlled by a controller with a temperature sensor. The temperature sensor head is located in the heart of the solar water heater. If the temperature in the solar water heater reaches 40 degrees Celsius or more (this temperature value can be adjusted), the controller will control the relay to disconnect the power to the electric water heater. At this time, hot water from the solar water heater flows through the electric water heater and flows down the faucet for use. If the temperature in the solar water heater is lower than 40 degrees Celsius, the controller will control the relay to power on the electric water heater. At this time, the water from the solar water heater flows through the electric water heater, here, the water will be heated to a certain temperature (depending on the user’s adjustment) and flows down the faucet for use. . The amount of electricity used to heat the water will be less because the water in the solar water heater itself is already heated more than normal water (during sunny days or hot temperatures). According to Kaohsiung, the outstanding advantage of this product is that it has come up with a solution to use solar water heaters in unstable rainy and sunny areas, namely the combination of using between the solar water heater and the electric water heater in a reasonable way. The power supply to the electric water heater is controlled to close and disconnect automatically on the basis of recognizing the water temperature in the solar water heater. This is the outstanding feature of the product, which helps to maximize the amount of electricity used to heat water. Without this automatic controller, according to habit, users will turn on the attomat to have hot water but forget that that day, it was sunny and there was hot water in the solar water heater. This habit will consume an unnecessary amount of power. But if there is this controller, the power supply for the electric water heater is fully automatic and scientific, depending on the water temperature in the solar water heater. Only when the temperature of the water in the solar water heater is too low (below 40 degrees Celsius), then the controller will output a signal to the relay to close the electric lock to supply power to the electric water heater. to boil water. Currently, the demand for hot water in daily life is very large. Therefore, in areas with erratic rainy and sunny weather that must use an electric water heater, the monthly electricity consumption is not small. But if installed in combination with another solar water heater, can significantly save monthly electricity consumption. According to the current quote, a 130l solar water heater (for a family of about 5 people) costs from 3.7 million VND, with a warranty of up to 5 years, a lifespan from 10 years to 15 years. The low initial cost but can be used for a long time and help consumers use hot water all year round without having to pay a lot of electricity bills is the obvious economic benefit of the project. Moreover, solar energy is a clean energy source that does not pollute the environment, therefore, if the product of the project is widely used, it will contribute to environmental protection. “We are very confident with this topic, because after completing the project, we were facilitated by our parents to install it right in our family to use. We are ready to support and guide the design and installation stages for families who need to use solar water heaters. Hopefully, our project will receive the investment of businesses to make products that are both technical and cheap to serve the needs of the people,” shared Dinh Thi Kim Oanh.

Founder and CEO of Dat Bike – Nguyen Ba Canh Son. To realize his start-up plan, Son spent a year in the US learning about manufacturing, from mechanics, electronics, to circuit design, industrial design, supply chain… Also in the same period of time. During this time, Son gathered a team of like-minded young engineers, learning how to make an electric motorcycle in the US. This is an important stepping stone for Son’s project formation and development in Vietnam. Founder and CEO of Dat Bike – Nguyen Ba Canh Son, said: “This capital will be used to improve the quality of the bike, perfect the sales team and expand the market.” In particular, improving the quality of the battery and controller will be put on top by Dat Bike. It is known that Dat Bike was established in 2018 with the ambition to become the largest electric motorcycle company in Southeast Asia. In the Vietnamese market, Dat Bike is having an estimated growth rate of 30%. Dat Bike’s first motorcycle model was launched in Vietnam in 2019 from the factory located in Binh Duong, called Weaver. The advantage of this model, which is also the difference with electric cars currently on the market, lies in its long travel time and fast battery charging. The battery installed in the Weaver uses LG’s technology, similar to the battery system installed in Tesla electric cars. In particular, the battery life is up to 10 years in conditions of regular use and is easy to recycle, with no adverse impact on the environment. Compared to other competitors, Dat Bike has the advantage of using domestic materials, instead of importing from other markets. This helps the company reduce transportation costs, increase production efficiency and receive tax support. Currently, Dat Bike has a shop in Ho Chi Minh City. Ho Chi Minh. Currently, Dat Bike has a shop in Ho Chi Minh City. Ho Chi Minh City and a factory in Binh Duong with a capacity of about 1,000 vehicles/month. The company has only focused on developing online sales channels in the Vietnamese market. In addition, another advantage of Dat Bike is that the company’s vehicles are manufactured in the country, most of the component suppliers are local manufacturers. Therefore, the Company can be proactive in logistics and supply chain services. In just a short time, Son and his team of associates have increased the production capacity of Dat Bike from 1 motorcycle shipped per week in the early days to hundreds of units per month. At the end of 2020, Dat Bike opened its first store in Ho Chi Minh City and currently, Dat Bike’s growth rate is 35%/month. In particular, in 2020, the Ministry of Transport has recognized Dat Bike Weaver as the first electric motorcycle originating in Vietnam. This is also the only model on the market today that has the same performance as a traditional petrol motorbike. Jungle Ventures is a Singapore-based venture capital firm that focuses on investing in early-to-growth businesses and start-ups in Southeast Asia and India. With a focus on building sustainable businesses, Jungle Ventures has been working with the region’s most ambitious founders to build high-growth technology businesses, using capital-efficient, with the potential to scale into leading regional or global companies. The $2.6 million capital “poured” from Jungle Ventures and investment funds allows Son and his associates to continue to create and develop the most complete electric motorcycles for users in the Southeast region. Asia and the world through investment in expanding production of Electric Vehicle Factory in Binh Duong. CEO Dat Bike calculates, with more than 80% of households in Indonesia, Malaysia, Thailand and Vietnam owning two-wheeled motorbikes, a total of about 250 million gasoline motorbikes, the size of the motorcycle industry in Southeast Asia. up to $25 billion. These potential numbers are the motivation for Son and Dat Bike team to continue firmly on the chosen path, contributing to promoting wider use of sustainable transportation solutions. Soon, Dat Bike will release the next version of Weaver. This version is capable of running 200 km, fully charged in 2 hours. In the further future, Dat Bike will develop more new models to suit a wide range of customers.

The biggest change on the Vive Pro 2 is a new screen with a resolution of 5K (2448 × 2448 pixels), a refresh rate of up to 120Hz and a viewing angle of 120 degrees. This is a big upgrade compared to the original Vive Pro launched in 2018 with only 2880 x 1600 resolution, 90Hz refresh rate and 110-degree viewing angle. Vive Pro 2 also supports Display Stream Compression (DSC) technology, the first to be equipped on a virtual reality headset. DSC is a lossless standard that keeps image data transmitted to virtual reality glasses intact, often found on high-end monitors. HTC says the Vive Pro 2 brings “minimum motion blur”, a screen door effect, showing grid lines on many older VR headsets, which have been almost completely eliminated on the Vive Pro 2. Besides the screen, the Vive Pro 2 has handy features like an adjustable strap, a dial that adjusts to size quickly. The built-in headset is Hi-Res Audio Certified with 3D spatial sound and works with third-party headsets. The new Vive Pro 2 will also work with all Vive SteamVR accessories, including the new Vive tracker, the new Vive Facial Tracker, any SteamVR controller, and more. The look is sleeker and more sophisticated, along with a slightly more compact size than its predecessor. HTC Vive Pro 2 is currently priced at 799 USD. If you upgrade from Vive Pro version, there will be a promotional price of 749 USD. The full version with included accessories, including a controller and Base Station 2.0 motion tracker, is priced at $1,399. According to Theverge