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Radio frequency controllers care for resource more valuable than gold



Radio frequency is a particularly important resource in any country. To control and ensure the harmonious use of frequencies, there must be staff who control the frequencies and handle frequency interference.

The special characteristic of radio frequency is that it is a finite resource, and the more it is used, the more valuable it becomes. It is considered a resource more valuable than gold.

Radio frequency controllers care for resource more valuable than gold

The routine work of Vu Son Tung is use of technical tools to monitor frequencies of radio communication networks

There are nearly 120 million mobile subscribers with 4G LTE in Vietnam and millions of wireless devices. The devices are used for different purposes, including aviation, maritime satellite information, and broadcasting.

The routine work of Vu Son Tung, one of the radio frequency controllers at the Authority of Radio Frequency Management, is use of technical tools to monitor frequencies of radio communication networks.

Tung and his colleagues use the control station system located throughout the country to inspect and supervise the observance of laws on the use of radio frequencies.

They have to identify interference risks and take timely measures to ensure the safety of radio information. This is a frequent occurrence because during operation, radio stations can interfere with each other, leading to loss of radio communication or to insecurity.

According to Tung, the most common incidents are interference of mobile communications, private networks and television broadcasting, and interference of frequencies for rescue, flood prevention, aviation operation, national radio stations, and security and defense networks.

Interferences often come from the improper use of radio frequencies and devices, equipment malfunctioning, or the use of smuggled equipment with unsuitable frequencies.

Tung and his colleagues sometimes have to control interference at big events such as the Party Congress, APEC Conference and the 2019 North Korea–United States Hanoi Summit.

At the events, signal congestion is very likely to happen in the context of the high density of wireless devices within a limited space. Their task at the event is ensuring the smooth operation of the radio system.

Asked about his most memorable days, Tung recalled the time when the US-North Korea Summit took place. The public wifi network at the press center of the conference had trouble, which made it impossible for reporters to transmit their reports home.

The cause of the problem was the high density of personal Wi-Fi transmitters. In addition, the network had been accidentally affected by some oppressive devices. After finding the reasons, Tung and his team successfully brought the network back to smooth operation.

The most outstanding success of Tung and his co-workers is the use of drones to control and handle interferences. This is the first time UAV has been used for this purpose in Vietnam. 

Hai Nam



Techfest Vietnam 2020 opens



The National Innovative Entrepreneurship Day (Techfest Vietnam 2020) and the Youth Startup Forum opened in Hanoi on November 27.

Techfest Vietnam 2020 opens hinh anh 1

At the event 

The opening ceremony saw the presence of Prime Minister Nguyen Xuan Phuc.

Techfest Vietnam 2020 is the largest annual virtual event organised by the Ministry of Science and Technology (MOST) to work with international partners to develop and promote science, technology, and innovation.

Taking place amid global disruption caused by the COVID-19 pandemic, the event is part of an emerging nation eager to display the dynamism of its startup ecosystem among investors/investment funds, enterprises, and experts worldwide via virtual events.

Themed ‘Respond – Transform – Breakthrough’, the event is structured into 12 technology villages: Medical Technology, Agricultural Technology, Educational Technology, Tourism and F&B Technology, Frontier Technology, Financial Technology, Smart Cities, Social Impact, Student Start-ups, Local Start-ups, Community and International village, with 250 potential startup booths, attracting nearly 200 investors, 150 corporations, enterprises and business accelerators virtually and physically.

Addressing the opening ceremony, Minister of Science and Technology Huynh Thanh Dat said the start-up ecosystem had entered a new and important period for development, requiring efforts and coordination from Government agencies, start-ups and businesses.

There is also a need to work together to innovate from working methods to mindset, developing human resources and creating a proper competitive environment, he said.

Startups should be proactive in renewing and changing the development model to create more value, he said./.VNA


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Trà Vinh steps up measures to cope with severe saltwater intrusion forecast in dry season




An agriculture official in Trà Vinh Province’s Trà Cú District instructs a farmer how to save her rice crop from saltwater and drought during the last dry season. – VNA/ Photo Thanh Hòa

TRÀ VINH – The Cửu Long (Mekong) Delta province of Trà Vinh has taken a number of measures to prevent saltwater intrusion up rivers and canals in the upcoming dry season to ensure there is no shortage of water for irrigation and household use.

Trà Vinh is one of the delta provinces hardest hit by saltwater intrusion between December and April, a phenomenon that has caused severe damage in recent years.

The delta is forecast to face a water shortage, and localities in Trà Vinh are speeding up construction of irrigation works, dredging of canals and repairs to degraded irrigation works to store freshwater.

In areas where irrigation systems are not extensive, local authorities are encouraging people to build embankments and temporary dams.

They have made plans for careful use of water.

The Trà Vinh People’s Committee has ordered the Department of Agriculture and Rural Development to closely monitor saltwater intrusion and inform the public so that people could proactively take preventive measures.

If there is severe drought and saltwater intrusion as forecast, water would be prioritised for household use, animal husbandry and high-value crops, it said.

The Department of Agriculture and Rural Development should instruct farmers to suitably organise their crops, aquaculture and animal husbandry, it said.

Farmers should follow the farming schedules put out by local authorities, grow rice varieties that are resistant to drought and saltwater and use advanced farming techniques and efficient irrigation to save water, it added.

It has ordered the Department of Agriculture and Rural Development and the Department of Construction to speed up construction of 12 clean water supply stations, install 130 km of new water pipes and more than 9,000 meters in households in the districts of Càng Long, Châu Thành, Cầu Ngang, Cầu Kè, Trà Cú, and Duyên Hải.   

Phạm Minh Truyền, director of the province’s Department of Agriculture and Rural Development, said saltwater intrusion in 2020 – 21 was forecast to be greater than in 2015- 16.

Trà Vinh and other delta provinces had seen record levels of saltwater in 2015- 16.

In the last dry season the intrusion began early and was severe, causing losses of around VNĐ1 trillion (US$43 million) to the agriculture, according to the department.  

More than 25,800ha of rice, 270ha of fruit and dozens of hectares of vegetables were affected.

Thousands of households suffered from a severe shortage of water. –


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HCM City to improve solutions to climate change response




The Tân Thuận drainage system being built in District 7 is one of HCM City’s major flood-control projects. — VNA/ Photo Mạnh Linh

HCM CITY — HCM City will assess the relationship between the factors that cause climate change and its socio-economic plans to develop long-term responses.

Nguyễn Thị Thanh Mỹ, deputy director of the city Department of Natural Resources and Environment, elaborated on the task at a recent meeting held to review implementation of climate change response plans over the last four years and set out orientations and tasks for the next decade.

All sectors and government agencies at all levels would need to join hands to find an effective approach to respond to the challenges of climate change and implement the city’s green-growth strategy, she said.

According to Mai Tuấn Anh, head of the department’s meteorology, hydrology and climate change division, the city’s responses to the challenges posed by climate change have enjoyed positive results in the last four years.

Research into and assessment of the impacts of climate change on natural, human and socio-economic factors have been implemented effectively thanks to a new methodology for building local climate change scenarios by the Ministry of Natural Resources and Environment, he said.

“That helps the city … develop solutions to mitigate the impacts of climate change.”

The Department of Industry and Trade has built models for energy monitoring and management that ensure no energy is wasted in the industrial sector that uses over six million kilowatt-hours a year.

The department subsidises the training of personnel at key industrial facilities in energy management.

It also organises seminars and propagates the adoption of energy consumption norms for the steel, plastic and chemical industries to help them clearly understand the laws on efficient use of energy and the benefits of energy saving.

To mitigate the impacts of flooding caused by heavy rains and high river tides, the city has invested in a number of tidal flood-control works like building sluices and dykes and dredging canals.

There are now only 22 flood-prone points in the city, down from 127 three years ago. The flooding also lasts shorter — for only 15-40 minutes after the rains stop — and is only 0.1-0.3 metres in depth.

The city has made plans to draw water from Dầu Tiếng and Trị An reservoirs to ensure there is enough for people facing water shortages caused by climate change.

The People’s Committee has been implementing a plan on household solid waste classification at source since 2017, and people are gradually getting into the habit of separating their wastes before dumping them, making recycling and treatment easier.

The city has invested in infrastructure, replacing rudimentary vehicles with modern garbage trucks and using advanced technologies to treat waste.

It has also invested in sanitary landfills and solid waste treatment plants that convert waste into electricity and generate by-products that can be recycled for compost and help reuse plastic waste.

The Department of Transport is working to diversify fuels, develop infrastructure for clean and renewable energy and promote the use of vehicles that use clean and environment-friendly fuels such as CNG, LPG and electricity.

This has helped gradually replace traditional fuels such as petrol, save energy and reduce pollution and greenhouse gas emissions.

The department also regularly checks vehicles for emissions, especially those emitting black smoke.

But Anh admitted there remained challenges in formulating a response to climate change.

For instance, data from studies and investigations on the effects of climate change was insufficient in terms of both quality and quantity for developing a comprehensive and effective response, he said.

“Propaganda and dissemination of information to improve public awareness have not been successful in mobilising the business community to participate in climate-change responses,” he added.

An official from the Department of Agriculture and Rural Development said the city should seek the collection of used bottles and packages that contained plant protection substances for proper disposal.

They should not be burnt or discarded indiscriminately since they could release toxic gases, he said.

It was necessary to encourage farmers not to burn straw after harvesting rice to reduce greenhouse gas emissions, and instead use it to grow mushrooms and as animal feed.

People living in places affected by climate change should select plants that adapt to salinity and have a short growth period, he added.

The Department of Construction said it would promote the use of unburnt and other environment-friendly building materials for construction.

It would regularly check standards, procedures and technical regulations for the treatment and consumption of ash, slag and gypsum discharged from thermal power plants, chemical and fertiliser plants and gypsum factories. —


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