Home Blog Page 2

The Japanese expert plans not to let the water wash away the results of the To Lich river

Japanese experts considered the method during the rainy season, when the West Lake water was discharged, it was not carried away to wash the experimental results of the To Lich river cleaning.

As expected, after 2 months, Nhat Viet Environment Improvement Joint Stock Company (JVE) will report to Prime Minister, People’s Committee of Hanoi City on a pilot project to clean a section of To Lich river and a corner of West Lake by technology. Nano – Japanese Bioreactor.

However, the discharge of more than 1 million cubic meters of water from the West Lake to the To Lich River affected the results, JVE had to apply for a pilot for another 2 months.

After postponing the announcement of results, yesterday, JVE had a press conference by the West Lake to inform about the upcoming pilot plan, the solutions so that the next water discharges and storms do not affect the To Lich river.

15 minutes notice and then flush
Mr. Nguyen Tuan Anh, JVE Chairman, confirmed that he did not receive notification of water discharge directly.

JVE technical staff has received a notification of water discharge at about 9:30 am on July 9, shortly after about 10-15 minutes, Hanoi Sewerage Company conducted the water discharge.

Discharging 1.5 million m3 of West Lake water into To Lich River, Japanese experts could not cope.

According to Mr. Tuan Anh, when receiving the discharge notification, both Japanese experts and JVE were passive, the pilot unit could not respond in 10-15 minutes.

1.5 million m3 / day as in the last flush, is 10 times the amount of water flowing from 280 discharges flowing along the To Lich river. This amount of water does not flow through 280 sluices but only flows into one sluice at the head of the river, exceeding the original estimate of Japanese experts.

Japanese experts have calculated from the beginning, despite the heavy rain, the upstream flow is not as large as the direct discharge of 1.5 million cubic meters of water recently.

Dr Takeba Akira, an advisor at the Japan-Japan Trade and Environment Promotion Organization, said: “With the West Lake water swept away beneficial microorganisms triggered by the Bioreactor plates, we are not responsible for any unit. both, this is an objective

Dr. Takeba Akira.

Regarding the ongoing Lich river cleaning projects, Japanese experts also said that the problem of cleaning the river is not simply the discharge of West Lake water or cleaning with Japanese technology.

According to him, the river must have water for input, which To Lich River now relies entirely on sewage flowing from 280 sluices. Therefore, it is advisable to clean the inside of the river first and then let the water in, increasing both the water flow and creating river flows. Then the beneficial organisms created by the nano machines will be distributed from the beginning to the end of the source.

“2 solutions of drainage company and Japanese expert, if combined, will revive the To Lich river properly”, Mr. Tuan Anh added.

To Lich River piloted another 2 months.

Build “apartment building”, do not allow water to wash away microorganisms
Japanese experts have developed plans so that the Bioreactor placed in the river bed will still activate the microorganisms and retain these creatures, no matter if discharging West Lake water or discharging more strongly, it will not be washed away. result.

“Experimental bodies in the To Lich river are like apartment buildings, microorganisms are the same as the people living in that apartment building. Soon, we will apply the biological measures to prevent the apartment building from being washed away by floodwaters. “

Biotech-applied pallets will help protect
The biofilter media will help protect, prevent water from swept away beneficial microorganisms when draining water.

Regarding operating costs, the Japanese expert confirmed that this project was 100% funded from Japan at the beginning, so even though it lasted for 2 months, Japan continued to sponsor, the Vietnamese side did not have to pay any cost. come on.

Japan is still sponsoring and piloting completely free the To Lich river cleaning project.

incident so we are trying to fix it. “

Magical mental health effects of enchanted youth drinks

A delicious green drink can be a golden key to helping treat anxiety, a fairly common and complex mental health problem.

Scientists from Kumamoto University (Japan) have proven that their country’s famous matcha tea powder not only makes delicious drinks but also good for health. Experiments in mice show that it directly affects two important neurochemicals and is a powerful anti-anxiety agent.

Matcha is the ingredient that has made many popular drinks over time – (artwork from the internet).

According to Dr. Yuki Kurauchi, MD, lead author of the study, in animal experiments, matcha has shown a direct effect on the two dopaminergic and serotonergic systems in the brain, helping them function. stronger. These are the two systems that help produce dopamine and serotonin, two important neurotransmitters.

Dopamine, dubbed the “happy hormone”, increases dopamine to help us feel happy, satisfied, motivated in all life activities, boosting the brain … Meanwhile, abundant serotonin helps you increase ability to regulate mood and appetite, sleep better, increase awareness … Deficiency of these two hormones can lead to low mood, ease anxiety and even anxiety disorders, a fairly complex syndrome journal in psychiatry.

Matcha is a famous Japanese green tea powder, the leaves of green tea (tea) are finely ground. Green tea plants used to make matcha must be grown under 90% shade and cared for in a special way by indigenous people. Matcha is often used to make a variety of drinks and is also a material for coloring, flavoring for food.

Dr. Kurachi added that in order to make a more positive assertion, an epidemiological study on humans is needed. However, the evidence they have collected is sufficient to show that matcha brings certain benefits to human health.

The research has just been published in the scientific journal Journal of Functional Foods.

What is the North Star?

The North Sea is the brightest star in the Big Dipper. For observers in the Northern Hemisphere, it occupies a special place. Only half a degree off the Earth’s axis, so when the Earth spins day and night, the North Pole stands almost still on the North Pole.

In modern astronomy, this star is an array of seven stars, the seven brightest within the boundaries of the constellation Daxin in the northern hemisphere. There are many other stars in the Big Dipper star.

Westerners also have their own names for these stars. After being codified on an astronomical map, the stars all have an astronomical science name in the constellation Ursa Major.

“Bắc Đẩu” is a folk calling for a group of stars composed of many stars.

Position 7 The North Star cluster brightens in the sky.

Because the Earth is spherical, the location of the North Pole on the horizon depends on the position of the observer. Specifically, the angle between the northern horizon and the North Pole is equal to the latitude of the observer. For example, viewed from the equator (latitude 0), the North Sea lies at the northern horizon. When moving to Houston, Texas (latitude 30), the North Sea lies 30 degrees above the horizon. When moving to the North Pole, the North Sea lies 90 degrees above the horizon, which is right above the observer’s head.

In the past, northern sailors measured the angle between the horizon and the North Sea to determine their latitude. However, latitude alone is not enough to determine a location on the surface of the Earth. So while many cultures successfully make expeditions at sea based on observing stars, the weather, and currents, the “longitude problem” has been the horror of sailors for millennia. century.

There are no stars in the Southern Hemisphere corresponding to the North. Moreover, the North Pole is not a very accurate indication of the North Pole, because in addition to the 24-hour rotation cycle, the Earth’s axis also moves in a cone. Therefore the projection of the earth’s axis in the sky will be a cycle of 26,000 years. So the North Sea also changes over time. 5,000 years ago, the Earth’s axis headed for the constellation Draco and the Big Dipper was the star Thuban. Similarly, 12,000 years later, the Vega star in the constellation Lyra will be the Big Dipper.

This fruit knows how to eat enough sugar, if not know, die immediately

Jamaican Ackee berries, native to West Africa, look very colorful and delicious, but looks can fool you if you do not know how to eat you can die within 24 hours.

The ripe ackee has turned red yellow and opened on its own but if you are not wise enough to open an unripe fruit and taste it inside, you will quickly become a victim of Jamaican vomiting, technically known as hypoglycin poisoning. You can die within a day.

Ackee is a strange fruit.

But despite all this, Jamaicans love the ripe yellow flesh of the Ackee fruit, and it’s an ingredient in their national, national cuisine.

Ackee is a pear-shaped fruit found in warm climates. When the ackee ripens, it changes from green to magenta to orange and separates to reveal three large shiny black seeds, each surrounded by soft, white to yellow flesh.

This fruit was imported to Jamaica from East Africa before 1725. Today, ackee fruit is canned and is one of the main export items of Jamaica.

The national dish of Jamaica is made from ackee berries.

To make the dish, salted cod was fried with boiled ackee berries, onions, Scotch Bonnet peppers, tomatoes and spices. It is often served as breakfast or dinner with bread, hard dough bread, dumplings, fried bananas, or boiled green bananas. Ackee and cod can also be eaten with rice and peas or white rice. If you come to Jamaica without trying this national and quintessential dish, you like you have never been to Jamaica.

What will happen if we destroy the Moon?

In this week’s question, Gizmodo carefully interviewed astronomers about the destruction of the Earth’s “satellite.” Although this idea has existed in science fiction for a long time, it is worth understanding that what would actually happen if this scenario came true.

Caitlin Ahrens: Astronomer, physicist, bachelor’s degree in Planetary and Space Science at the University of Arkansas.

Let’s suppose we want to explode the Moon, “just for fun”, what are our options?

The moon is a spherical rock with gravity. This means that the stones and dust particles are all joined together by a “binding energy” – the minimum amount of energy required to disintegrate a particle structure block into separate parts.

The moon is a spherical rock with gravity.

The moon is an object with a mass of 7.3×10 ^ 22 kg and a radius of 1.737 km.

Actually turning it to ashes is not entirely easy at all. Anything smaller than the binding energy will cause the stones to regroup themselves into a sphere. The Moon’s binding energy has a value of 1,2×10 ^ 29 Joule.

With these parameters, we have three options:

Nuclear: The binding energy is converted to the same TNT energy 2.86×10 ^ 13 Mega-tons TNT. With the most destructive bomb in the Cold War creating 50 mega-tons – it takes 572,000,000,000 bombs to destroy the Moon!
 Lazer: The energy from the Sun in 6 minutes is 3×10 ^ 13 Mega-tons – just enough to completely evaporate the Moon!
 Drilling: To occur, we need to create an earthquake on it with a magnitude of at least 16.45 on the Richter scale – while the largest earthquake recorded on Earth is 9.5 on the Richter scale.
Pamela Gay: Astronomer, writer, director of Technology and Citizen Science at Pacific Astronomical Association.

How will the destruction of the Moon affect the life of all life on Earth?

If the energy produced were enough for the moon to explode, the first thing that could happen is the casualties to humans. The moon is retained by gravity and in the micro direction is the chemical bond between the rocks, the stones or even the grains of sand. Therefore, fragments of the Moon will “fly” at great velocities – with large pieces, large holes can be created, while small pieces will burn in the atmosphere.

The moon explodes, the first thing that can happen is casualties to humans.
If the energy produced were enough for the moon to explode, the first thing that could happen is the casualties to humans.

In some special cases, the large pieces of meteorite that touch the Earth will create shock waves with the ability to create tsunamis, the disease is a large amount of debris flying into the atmosphere. At the point of impact, it may be so hot that evaporation of large water bodies can occur.

Even though its small debris falls may not cause immediate casualties, when the speed is reduced due to friction, the momentum gradually turns into heat. The more these small meteorites enter the air, the more they will heat up the atmosphere. At some point, convection makes the Earth itself a furnace, and it will cook anything that’s not under the ocean and lying on the ground.

What about the tide if there was no moon?

Nearly all the water on the surface of the Earth will be scattered.

As intended, any river or ocean created after this event will not be affected by the tide – because there will be no more tides created by the Moon. In addition, it is possible that the small rocks and fragments of the Moon may form a “satellite” and will impact the environment, there may be new tides based on the cycle cycle, the distance and diameter of this object from Earth.

Konstantin Batygin: Astronomer and assistant professor of Astronomy Science at Caltech.

And after this event, will the Earth’s shape change?

Without the Moon, the Earth would spin very chaotic.

The moon is really valuable – it balances the Earth’s axis of rotation. Otherwise, the Earth will spin chaos between 0 and 85 degrees. Although the time period for such changes is too long (tens to hundreds of millions of years), the chaotic changes of the Earth’s oblique can have an adverse effect on climate stability and the possibility of climate change. collective habitation of our planet.

Therefore, we may not even exist without the moon’s presence in the first place!

This new AI can predict human feelings through gait

Our emotions can affect everything, from appetite to the way we perceive the world – and even the way we walk.

So can we explain someone’s feelings just based on their gait? That’s exactly what scientists at the University of North Carolina at Chapel Hill and the University of Maryland at College Park have been teaching computers to do. Using deep learning, their software can analyze a video of someone walking, convert it into a 3D model and extract that person’s gait. A neural network will then determine the dominant motion and pair it with a specific type of emotion, based on the data it has been trained before. According to the researchers, this deep learning model can predict 4 different emotions – happy, sad, angry and normal – with an accuracy rate of up to 80%.

This deep learning model can predict 4 different emotions – happy, sad, angry and normal.

Although we’ve seen many AI trained to guess human emotions based on facial expressions or voices, this is the first time there’s an algorithm trained to correctly guess emotions just by looking at them. people walk.

Aniket Bera, a research supervisor and a professor of computer science at the University of Maryland, said their research was not about seeking ways to detect actual emotions, but rather predicting perceived emotions. – that is, one’s emotions in the eyes of the opposite person, just like we predict each person’s emotions when they meet each other every day. According to Bera, through research, it is possible to teach robots how to guess what the people around them are thinking, and change their behavior accordingly. Or vice versa: it can help engineers design robots that better communicate with their gait and body movement.

Bera added that this research will help pave the way for future surveillance applications, or even help make the mixed reality experience more compelling, as human 3D models are following suit. Specific ways can help design more realistic characters.

But the team concludes that the next step will be to focus on other actions, not just walking, such as running, and gestures, to understand even the smallest emotions we express. reached on the move.

Retinoblastoma: Causes, symptoms, diagnosis and treatment

Retinal cancer is a life-threatening disease, but if treated properly and promptly, the disease is rarely fatal.

What is retinoblastoma?
Retinoblastoma also known as retinal cancer is a malignant eye disease seen in young children. This is a serious disease that can not only damage the eye’s function but also be life threatening. The tumor may grow in one or both eyes. The disease may be inherited or sporadic. Genetic retinoblastoma can also cause other types of cancer in children.

Most patients are diagnosed before 2 years of age but can be detected at birth and in adults over 52 years of age.

If detected and treated early, it can be cured with a 5-year survival rate of up to 90-95% and retain high eyeballs.

Retinal cancer is a malignant eye disease seen in young children.

The cause of retinoblastoma is due to a genetic abnormality related to or inherited.

Retinoblastoma is related to family factors: accounting for 6%. The disease usually manifests as early as a few months old, often with both eyes. Your child may have another type of cancer.
Retinoblastoma unrelated to family factors: 94%. The reason is a genetic mutation in which 80% are not inherited and 20% may be inherited.
Symptoms of retinoblastoma
Symptoms of retinoblastoma depend on the size of the tumor, the stage of the disease, and complications of the tumor in the eye. A number of cases have been found to be opportunistic due to eye exams for premature infants or school children.

White pupils: More than 50% of the disease is detected from white pupils. Signs can be described by many different words such as “cat eye”, “animal eye” … When looking into the eyes of the child will see light, can see 1 or 2 white or yellow pupils when taking photos I use flash. This is particularly noticeable at night or in a dark room as the pupils will dilate.
Strabismus: More than 30% of children with retinoblastoma are detected from this sign.
Vision loss: 8% of cases detected by this sign.
Other signs: redness and eye pain due to glaucoma, uveitis, orbital cellulitis, vestibular hemorrhage …
In the late stages, the tumor may progress behind the eyeball as it invades the optic nerve, spreads into the eye sockets and spreads far. The tumor invades through the optic nerve or subarachnoid space into the intracranial. The tumor can spread into the skull, spinal cord and lymph nodes. From there the tumor along the bloodstream, lymphatic vessels metastasize far to the organs in the body.
Clinical forms of childhood retinoblastoma include:
One eye retinoblastoma: 75% of cases, children 2-4 years old.
Bilateral retinoblastoma: seen in 25% in children younger than 14-16 months of age, with genetics in 40%.
Trilateral retinoblastoma: is a retinoblastoma and additional pineal cell tumors, accounting for 3-9%. The disease has a very poor prognosis. Most children die within 35 months.
Stages of retinoblastoma:
Retinoblastoma is staged according to S. Jude Children’s Research into 4 stages:

Stage 1: U (one or more foci) is localized in the retina.
Stage 2: U (one or more foci) spreads outside the retina but is limited to the eyeball.
Stage 3: Tumor invasive outside the eyeball, metastatic intracranial.
Stage 4: There is a metastatic distance along the bloodstream (internal organs, bones, bone marrow …).
Risk subjects for retinoblastoma:
Children, especially under 2 years old
Children have abnormal eye symptoms such as squint, red eyes, hemorrhage, cat eye images, etc.
Children with sick family members
Prevention of retinoblastoma:
There is no specific preventive measure
The best way is to examine your baby’s eyes when there are any suspicious signs
Screening and screening for children with family factors

Tests in the diagnosis of retinoblastoma include:
Brain X-ray: 75% of cases have intraocular calcification and the tumor invasion can be identified.
Ultrasound: especially useful in cases of cloudy cataracts
Computerized tomography: advanced technology to help determine the calcification and pre-assess the treatment of disease activity in the optic nerve, in the eye socket and in the brain
Determination of LDH in vitreous fluid: Increased LDH is seen in more than 90% of retinal cancer patients
CEA and AFP levels rise in the blood and then gradually decrease to normal levels after removal of the eyeball.
Cerebrospinal fluid test assesses the invasion of the tumor into the CNS
Pathology: is not a mandatory test when diagnosing retinoblastoma because the diagnosis is mainly by non-invasive methods of eyeball. The postoperative valuable surgical procedure helps to assess the extent of tumor invasion.
Measures to treat retinoblastoma
Surgical, chemical and radiation treatments achieved satisfactory results with an overall survival rate after 5 years with 90% of intraocular tumors, and 10% of external invasive tumors. . The current treatment trend is towards living with preserving vision of patients.

Surgical removal of the eyeball
Point:

Large tumors (> 60% volume of eyeball)
The patient has no vision
The tumor invaded the optic nerve, invaded the anterior chamber
Failure of previous conservation treatments
After surgery, there may be auxiliary chemicals or radiotherapy in cases of invasive iris, creases, choroid …

After surgery, the eyeball can be fitted to a child.

Surgical complications: spreading cancer cells into the eye socket.

Rays of radiation
Indicated in the case of large tumors on both sides, having germinated into the lens, tumors near the optic nerve

Complications of radiation: damage to the retina, optic nerve, lacrimal gland and lens

The second cancer that comes after radiation is also a complication to note, especially in patients with hereditary retinoblastoma.

Optical laser east
Applicable for tumors of small size, width <4.5mm and thickness <2.5mm

Direct treatment within the tumor, clotting the blood vessels to supply the tumor

Chemistry
Chemicals are used in cases such as:

Multiple invasive polyps> 25% of retinal areas without radiation therapy
All large tumors are not removed
The tumor invades the cornea
The damage spreads outside the eyeball.
Bad prognosis factors include:
Delayed diagnosis of disease greater than 6 months.

History of intraocular surgery that has the ability to germinate into glass or spread malignant cells out of the eye.

Patients with cataracts.

Radiotherapy using external radiation can lead to secondary cancers, especially in patients with inherited retinoblastoma.

Tumors that invade the choroid, optic nerve or eye socket increase the risk of metastases.

Risk of spillover into the optic nerve: extracellular growth pattern (for example, from the outer layers of the retina towards the choroid), increased intraocular pressure and the thickness of the mass ≥ 15 mm.
Risk of spreading into the choroid: increased intraocular pressure; new blood vessel iris.
The prognosis also depends on the state, location and extent of the tumor recurrence.

Discovered tiny worms capable of emitting … the biggest sound in the ocean

Many people may think this is a strange thing, but the fact that the newly discovered sea worm has the ability to make the loudest sounds ever recorded in the ocean.

When you think of loud sounds, you can imagine screams … separating ears or explosions that make us cry. But what if in the ocean environment? The sea worm, which is only 29mm long, has set the record for researchers to surprise.

The newly discovered sea worm has the ability to make surprising sounds in the ocean.

The base was launched by marine biologist Ryutaro Goto from Kyoto University and colleagues measured the sounds emitted by these worms, which emitted a sound of up to … 157 dB.

In fact, we can hear sounds as low as 10 dB, but about 130 dB of sound can become painful and harm the ear.

“The sound of the newly discovered worm is comparable to the sound made compared to the way the shrimp attack the prey, which is one of the most intense biological sounds measured at sea,” researchers explain.

The shrimp mentioned can produce sound intensity of up to 189 dB so that they stun prey, which is enough to break the glass.

The researchers pointed out that mollusks were not known to make a loud sound, at least until the team brought the creatures back to the lab and witnessed small noises. emanating from their mouth.

“A loud bang could be a byproduct of a fast oral attack,” the researchers commented.

In fact, this strange sea worm was only described recently in 2017, and it gouged holes in sponges along Japan’s Pacific coast, where it waits for its prey and aggressively protects the lawn from the opponents.

The researchers recommend that people should not return to some of the Marshall Islands because radiation is still above safe threshold.

The researchers recommend that people should not return to some of the Marshall Islands because radiation is still above safe threshold.

Some of the Marshall Islands in the Pacific Ocean, such as Bikini Atoll and Enewetak, are still more radioactive than Chernobyl and Fukushima, although more than 60 years have passed since the US tested nuclear weapons in the region. this. When testing plutonium-239 and 240 isotopes in soil samples, the researchers found that some islands are 10 to 1,000 times more radioactive than Fukushima and about 10 times the Chernobyl forbidden zone.

In 2016, a team at Columbia University in New York published a paper in the journal Proceedings of the National Academy of Sciences (PNAS) on background gamma radiation north of the Marshall Islands, including the islands of Enewetak, Bikini and Rongelap. . They found that the radioactivity on Bikini Island was higher than previously reported, so they decided to conduct further research on radioactivity on the islands.

On July 15, the research team published three new works in the PNAS journal about four Marshall Islands atolls: Bikini, Enewetak, Rongelap and Utirik. The amount of gamma radiation in Bikini Atoll, Enjebi Island on Enewetak Atoll and Naen Island on Rongelap Atoll is much higher than an island in the southern Marshall Islands that scientists refer to.

Mushroom cloud in Romeo nuclear bomb explosion on Bikini island. (Photo: News.com.au).

The amount of radioactivity on Bikini and Naen Islands was so high that it exceeded the maximum limit agreed by the United States and the Marshall Islands in the 1990s. The researchers also discovered Runit and Enjebi islands of Enewetak Atoll, as well as Bikini and Naen Island, have a high level of radioactivity in the soil.

In the second study, the scientists worked with professional divers to collect 130 acres of land from the Bravo Castle crater in Bikini Atoll. Some isotopes like plutonium-239 and -240, americium-241 and bismuth-207 are higher than others in the Marshall Islands.

In the third study, the authors examined more than 200 fruits, mainly coconuts and pineapples on 11 islands of 4 atolls north of the Marshall Islands. As a result, the amount of cesium-137 in many fruits on Bikini and Rongelap islands is well above the safe threshold.

The moment the ISS station flies past on the sun

NASA shared a stunning picture depicting the tiny shadow of the ISS station against the giant surface of the Sun.

The composite image capturing the moment the International Space Station (ISS) flies between the Earth and the Sun, by photographer Rainee Colacurcio, was voted by NASA to be a beautiful Astronomy Photo of the Day. Although the ISS is closer to Earth, the orbital lab looks still very small in front of the massive surface of the Sun in the background.

The composite photo was taken by photographer Rainee Colacurcio from the ground. (Photo: NASA).

“That’s not the sunspot. It’s the International Space Station (ISS) flying through the sun,” explains Colacurcio. “The Sunspot has a dark shadow in the center and a semi-dark area with brighter colors and no solar cells. On the contrary, the ISS is a complex, multi-roofed apparatus, one of the the largest and most complex human ever created, “Colacurcio said.

According to Colacurcio, passing in front of the Sun is not too rare for the ISS station to fly around the Earth every 90 minutes. But very few people can set the right time and prepare the right equipment to create a great photo.

In fact, the image shared by NASA is a combination of two photos, one of the ISS station passing in front of the Sun and the other taken at the same time detailing the sun’s surface. The composite image also shows that the Sun lacks dark spots. These are dark patches that temporarily appear on the Sun’s surface and indicate areas with relatively lower temperatures around them due to the magnetic field lines impacting the convection. The number of black spots at each time varies greatly over the Sun’s 11-year cycle.

“Black spots are rare on the Sun since the beginning of the minimum phase, in which the Sun is very little active. For reasons that researchers do not fully understand, the number of black spots appears at the extreme stage. Previous and present urination is abnormally low, “explains Colacurcio.

//deloplen.com/afu.php?zoneid=2884639