Fit

How micro -redes fit into the energy puzzle

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In recent years, Spain has turned the sun In his best ally for photovoltaic generation. However, the April 28 blackout has evidenced the lack of effective integration in the electricity network. Short. Until now, the first image that always accompanies renewables are batteries, but there is another network coupling system: micro -redes or micrographs. According to He explained Borja Santos, CEO of Full & Fast, for Europa Press, micro -redes are autonomous energy systems composed of a power converter and a battery system. These systems receive all energy inputs and outputs from different sources, such as structure, solar panels or even conventional electricity. Deeper. The micro -redes They operate through storage systems that allow accumulating the energy generated at times of low demand or high production. This stored energy can then be released at critical moments, guaranteeing system stability. This model not only provides supply security, but also offers economic opportunities by managing stored energy and releasing it when the market price is more favorable. When the energy zero arrived. In case of a main supply drop, the MICRORRED can continue to function independently, maintaining the continuity of the energy service for its users. In other words, micro -redes act as a “network within the network”, allowing communities, industries or rural areas to continue operating without interruptions, even if the national electrical system collapses, such as has detailed Borja Santos. In addition, he added that the blackout revealed the lack of systems capable of generating its own voltage and frequency reference. The micro-redes, on the contrary, can do so, thus preventing the systems from entering in a state of “stand-by” as happened in Spain. In other words, what gives you the micorred is self -sufficiency and the ability to continue operating and working uninterruptedly, there is light or not. A country with solar overcapacity. Spain has invested massively in solar parks, but, like has pointed out The former Minister of Public Administration, Jordi Sevilla, the electrical system has not adapted to this new reality. Seville has warned that “the generation points connected to the transport network have been multiplied, as well as its geographical distribution,” which has increased the complexity of managing the electrical system. In addition, he explained that the normative proposals presented by Red Electrica to regulate photovoltaic investors have been in the Ministry’s drawers for years, while the network still does not adapt to the new realities of the energy mix. However, the problem does not lies in generation capacity, but in the inability to manage it effectively. In this sense, Borja Santos has pointed out That “in Spain there is overcapacity of solar generation, but those solar parks confront a problem: they generate maximum energy when you least pay the market”, which reduces profitability for investors. The implementation. Despite the potential of the micrordes, their mass implementation in Spain faces several challenges. On the one hand, the current regulation does not sufficiently encourage the development of these systems, and the normative proposals that would allow renewables to help control the tension and reactive current of the network still sleep “the dream of the righteous”, According to the former minister. On the other hand, the Spanish electrical system It has been designed To manage synchronous energies, such as gas or nuclear, which generate their own frequency reference. Renewables, on the other hand, depend on electronic systems that do not offer this reference naturally, which increases the complexity of integrating large volumes of solar or wind energy without compromising its stability. For that reason, UNEF has pointed out the implementation of the procedure Operation 7.4 would allow renewables to control the tension and reactive current of the network, contributing to mitigate future blackouts. Forecasts. The April 28 blackout evidenced a problem in the management and storage capacity of the national electrical system. The micro -redes are presented as a solution thanks to their ability to operate independently and maintain the supply at critical moments. Image | Pexels and Victor Romero v Xataka | There is a suspect number 1 to explain the total blackout of Spain: a poor stabilization of the electricity grid

This bridge built by China is so high that two Eiffel tower fit under it. And they have built it in just four years

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We have been having bridges from prehistory. From that tree That someone would use to connect two sides to the majestic Roman bridges, humanity has evolved while doing the bridges he built. The more recent techniques They allow us to connect extremes that are separated by tens of kilometers, but Talk about bridges It is currently looking at China. They not only have The longest maritime bridgebut also the highest in the world. It is the Bridge of the Grand Canyon of Huajiang and the most surprising thing is not that under it two Eiffel Tower enter one over another, but that it has only taken four years to lift it. Necessary. The Gran Canyon of Huajiang is located in the province of Guizhou. It is an area that, traditionally, has been isolated from the rest of the area for a reason for weight: more than 90% of the territory is mountainous terrain that hinders communication. For centuries it did not have much importance for the rest of the empire, but China has been raising infrastructure (and also excavating) to demolish those geographical barriers. Puzzle. The objective of the government is to connect rural areas with urban centers and, in this case, you had to get the Liuzhi-Anlong highway to raffle the mountains to speed up transport times. The only way was through a bridge, and after an analysis period, in 2022 They started The construction of the great bridge. It was not going to be simple: it should not only be at a considerable height, but to have a length of almost three kilometers. And the problem was not so much to create the suspension bridge, but to raise the necessary materials. To do this, implemented Advanced technologies to raise steel beams by up to 215 tons of weight and, despite the difficulties in the field, the works have gone at a pone rhythm. To all fuse. That is what usually attracts the attention of these Chinese infrastructure that, weighing some exceptions such as half -building abandoned skyscraper For years, they are an example for the rest of the world. The works advance with speed and, if At the beginning of this year We already saw the two towers of 262 and 205 meters on both sides of the bridge, as well as the cables of 9,000 tons each, now we observe that they have already built the section that joins the ends. The length Total of the bridge is 2,890 meters and the main section, which is among the towers, has a length of 1,420 meters that positions it not only as the highest bridge in the world (it is 625 meters from the ground, reaching the end of the towers at 776 meters), but as the longest hanging section built in the mountainous area. The comparison with the height of the Eiffel Tower is interesting, but almost two Empire State Building would also enter. The technology used in construction is also interesting. For example, when the concrete pour, Guizhou Bridge Group builders devised a system of pipes that pump cold or hot water depending on the outer temperature to ensure that fresh concrete dried in the best possible conditions to avoid cracks. And, to guarantee maintenance, the cables have sensors that measure vibrations or wind intensity to offer reports on the state of the hanging section. Impact. In January of this year, it was reported that 75% of the project had been completed, but in recent months we have seen how they have advanced so much that it is practically only missing and installing the security elements. The idea is to open at some point in June this year and, once open, will allow Crossing the canyon in just a couple of minutes when before it was something for more than an hour. But beyond all this, the most impressive thing is that they have been able to build an infrastructure in a very complicated place and condense 439,000 m³ of concrete and 49,000 tons of steel in just four years. And the cost? In theory, 280 million dollars that are difficult to estimate whether they will recover by joining rural areas, but as infrastructure and demonstration of strength, the Huajiang Grand Canyon bridge is imposing. And will remove the record from the highest bridge Lege’s, also in China. Images | Xinhua (1, 2) In Xataka | With 526 meters in length, China has a new record of the longest glass bridge in the world

50 years ago we discovered people whose blood did not fit into conventional types. We have just discovered why

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We have been classifying blood types for more than a century as a function of two characteristics, the antigens of these and the RH factor. The four types of blood depending on the antigens (0, A, B, AB) and the two depending on the RH (positive or negative) allow us to classify people’s blood into one of eight categories. But as always, there are exceptions and one had intrigued scientists since the 1970s. Until now. A new blood group. A study led by researchers from the University of Bristol a new blood group has describedANWJ (positive or negative). According to the study, the key to this group is in the evil gear, a gene that encodes a homonymous protein that we can find on the surface of the red blood cells. A more complex system than it seems. The antigens surrounding the cell wall of the red blood cells are a pillar of blood transfusions. The presence of antibodies linked to this type of molecules makes some transfusions associated with complications. For example, a person from Group A receives a transfusion of a person from group B, antibodies associated with antigens to attack newly arrived cells. There are two key systems, AOB and RH Factorwhich are key since they are the ones that present the most diversity, and therefore greater is the possibility that a blood transplant can generate incompatibilities. However to date we have found more than a quarantine Of variants that, although they affect a small part of the population, must be considered. 50 years of mystery. The ANWJ antigen was discovered in 1972 but it has not been until now that we have discovered the genetic background behind the existence of Anwj-negative people, that is, people whose cells do not contain this antigen on its surface. This absence affects less than 0.1% of humanity and is generally due to hematological and oncoligic disorders. The evil gear. The team responsible for the discovery investigated the few known cases of ANWJ-negative people who were not as a result of any disorder. They found that this antigen was in the bad protein. They found that the hostj-negative people lacked full copies of the protein badly. “The work was difficult because genetic cases are very scarce. We would not have achieved this without the sequencing of exams, since the gene we identify was not an obvious candidate and it is little that we know of the bad protein in the red blood cells,” explained in a press release Louise Tilley, co -author of the study. The details of the study were published In an article In the magazine Blood. Less risks in transfusions. Knowing the different blood groups, including those that only include a very small portion of the planet’s inhabitants is important. The more we know about these groups, the greater our ability to Avoid complications associated with blood transfusions. “Now it is possible Nicole Thornton addedalso member of the work responsible for the work. In Xataka | The unequal distribution of blood groups in the world, illustrated in this detailed map Image | Swiftsciencewriting

Perseverance has found a very strange rock on Mars. Is covered with spheres and does not fit with its surroundings

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He Rover Perseverance He has discovered an intriguing rock on Mars. Composed of hundreds of small spheres, NASA scientists They are investigating how it formed. After climbing (Not without difficulties) The edge of the Jezero crater, Perseverance has been exploring a place called Broom Point, where he has seen rocks of different colors. There he took samples of clear stones and discovered a strange texture in a nearby dark rock. Appeared “St. Pauls Bay”, the rock is covered with Timinutas gray spheriessome crushed or games, other perforated, reminiscent of a lot of blueberries. The formation is very peculiar and darker than the environment. It is not the first time that NASA finds strange spheres in Mars. The Opportunity and Curiosity Roversity saw similar formations, nicknamed “Blueberries”, which originated when The planet was full of waterdue to the groundwater, circulating through the rocks. But the Water circulation It is not the only process that can lead to spherules. Also volcanic eruptions or meteorite impacts. The St. Paul’s Bay rock in its surroundings The geological origin of St. Pauls Bay is not clear. It is a floating rock, so it was not in its original position, which suggests that the spheris may not be concretions (particle accumulations). Perseverance team is checking if the Rock fits with The layers observed in the surroundingsa region called Witch Hazel Hill. Discovering the origin of these tiny spheres could help NASA to unravel the Geological history of the area. If it belongs, like other Jezero rocks, at the NOEICA age, it is an exceptional witness of the primary cortex of Mars more than 3.7 billion years ago. In addition to Find past life cluesPerseverance tries to understand how Mars became an inhospitable and cold planet of little atmosphere, something that could also happen with the earth in a few million years. Images | NASA, JPL-Caltech In Xataka | Perseverance is leaving rock signs along Mars. And something even more valuable: air samples

They are not going to fit the 60,000 satellites that plan Spacex and company

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More than 10,000 active satellites Orbit our planet. Two thirds are from the Starlink constellation Spacex, which has A team working 24/7 to prevent collisions against other satellites and large fragments of space garbage, of which there are at least 40,000. It is a known problem, but we did not expect it to get worse for climatic reasons. The effect of climate change on space garbage. Carbon dioxide emissions, responsible for global warming due to their greenhouse effect, cause the opposite effect on the upper atmosphere, cooling and shrinking the highest layers, which makes the atmosphere itself become less dense. This phenomenon favors the accumulation of space garbage. As? The upper atmosphere acts as a natural “cleaner” for space garbage. When the objects orbit near the earth, they touch the atmosphere, however light, slowly slowing down until they fall and burned. But, with a thinner atmosphere, this cleaning effect weakens significantly, which means that space garbage remains in orbit longer. The projections are scary. According to a study published in Nature SustainabilityIf we continue to generate greenhouse gas emissions without control, the atmosphere will become so thin that, by 2050, the ability to house satellites of the low terrestrial orbit orbit would be reduced by 27%. By the end of the century, the reduction would be between 50 and 66%. The study introduces the concept of “instant orbital capacity” to calculate how many satellites can operate simultaneously without generating uncontrolled growth of space garbage, emphasizing the cyclic variability of the sun: during the minimum solar, the atmosphere is further contract. The problem of constellations. The growing technological demand of the land orbit is dominated by Starlink, which will soon follow other Chinese, European and American constellations with their Plans to launch up to 60,000 satellites In the coming years. The low orbit (between 200 and 1,000 km of altitude) where most satellites operate could become unsustainable. In the worst stage, a single collision would cause A destructive waterfall Known as Kessler syndrome: a chain reaction in which each shock generates more fragments, exponentially multiplying the amount of space garbage and returning the practically useless earth orbit. What we are doing to avoid it. Beyond reducing emissions that aggravate this phenomenon with the energy transition, there are companies and space agencies Testing techniques to remove space trashlike the famous satellites capable of capturing old objects. But the most effective solution, which bets on the European space agency in its Strategy 2040is to stop adding trash through launching and design regulations of the strictest satellites. Jared Isaacman, nominated for NASA administrator, stressed in his X account the seriousness of the problem: “Even an aluminum fragment of millimeter size, traveling at orbital speed, can cause considerable damage,” wrote. For Isaacman, the solution is to immediately stop the creation of new space garbage and Avoid military conflicts in orbitthat could trigger the dreaded Kessler syndrome. Image | Max Alexander/Steve Kelly (ESA) In Xataka | Space garbage is such a real problem that Starlink satellites make thousands of evasion maneuvers every month

We had to observe 4,000 supernovae to realize that something does not fit the explosions of the white dwarfs

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Approximately a century ago we realized that the universe was not static but extended. Some theories even estimate that it does it at increasing speeds, but measuring this speed has become A major headacheas much as explaining the mechanisms that underlie this cosmic inflation. But maybe we are doing too many turns to the matter. Not so predictable. A study has observed That the supernovae associated with the white dwarf stars are not as predictable as we believed. The study presents us with a problem, and that is that the role of these explosions as markers of the cosmic distance is staggered now. Star milestones. Regular and predictable cosmic objects and events are of great help for astronomers when analyzing a vast and diverse cosmos. Know what intensity an object or a distant event shines opens the road to precisely calculating your distance based only on the intensity with which it shines in our sky. That is why these supernovas had been useful for calculating distances and with it the changes in the distance over time, that is to say the speed. The speed at which the objects of the cosmos move away from each other. Explosions of the most varied. The new study has revealed that supernovae associated with White dwarfs They are not in this group of regular cosmic events as we believed. Through its observations, the team found “multiple and exotic ways” in which white dwarfs could explode. These included collisions between two stars and star cannibalism in binary systems. “The diversity of ways in which white dwarfs can explode is much greater than it was previous And until years later ”´, pointed in a press release Kate Maguire, co -author of the study. 4,000 Supernovas. The finding was possible thanks to the use of tools capable of detecting very faint signals and the accumulation of a large amount of data for the sample. The team resorted to the data of the ZTF survey (Zwicky Transient Facity), From which they obtained information from a total of 4,000 supernovae, a sample, they explain, much greater than those previously compiled. “Thanks to the unique capacity of ZTF to scan the sky quickly and deeply, it has been possible Maguire added. The details of the study were recently published in a special number in the magazine Astronomy & Astrophysics. Dark energy. The finding is at the same time a problem and it is that if we lose one of the tools used to calculate the distances in the cosmos. In spite of this, it is great news since knowing that the outbreaks of white dwarf the one that moves away from us. In Xataka | What astronomers believed was going to be a boring supernova has revealed an enigma of the galactic dust Image | Trinity College Dublin

Hiba Abouk practices the training that tones the most and helps us age better

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Along with Vanesa Lorenzo or Ariadne Artiles, Hiba Abouk is another of our celebrities athletes who also inspire their followers to overcome laziness and perform in the gym. Exercise is part of her life and we have seen her for years leading by example through ideal boxing sessions to reduce stress and increase self-esteem or ‘full body’ routines that work the entire body at the same time. The actress is also a great fan of strength training, highly recommended by experts because not only is it one of those that tones the fastest, it also optimizes our endocrine system, helps us age better and even prevents us from feeling hungrier after eating. © hiba_abouk_ Hiba Abouk’s strength training Dumbbells, weights, resistance bands, kettlebellskettlebells… There are many different accessories to work on strength and, under proper supervision (Hiba relies on the one known in networks such as 23toptraining), all of them help strengthen muscles and general health. To begin with, the technical director of JG fitness, Fran del Águila, highlights his ability when it comes to increase leptin sensitivity: “It is a hormone produced by fat cells that sends signals to the brain to indicate that we are full. When leptin levels are adequate, we feel less hungry and have more energy.” The opposite also happens, “Factors such as obesity, genetics and a sedentary lifestyle can alter the body’s sensitivity to leptinmaking it difficult to lose weight and maintain a healthy weight. The reason why weight work plays a fundamental role in the performance of this hormone is that “By burning calories and building muscle, it helps reduce fat percentage body, which in turn improves leptin sensitivity. © hiba_abouk_ An ally at all ages Although this type of weight training is associated with young people with a well-developed physical background, Technogym, a leading brand in fitnesswell-being, sports and health, they consider it critical for the elderly demographic“since it is the most effective way to combat the natural and age-specific tendency to body weakness, linked to the loss of muscle mass.” Its experts assure that “adding moderate/mild strength training sessions prescribed by a doctor and guided by a trainer to the routines of older people essentially decreases the likelihood of injury and allows them to lead an active life for longer. © Silou London As for those worried about gaining too much volume with this type of routine, Sara Álvarez, co-founder and creator of the RETO48 method, denies it: “The most widespread myth is that if you lift weights you will have a bulky bodyand women tend to avoid the weight room because they believe that cardio is the only way to lose weight and tone up.” The expert assures that “this idea is a product of ignorance of the benefits of strength training, especially its ability to build a healthy and fit physique. Finally, Álvarez recommends it as an ally to lose weight: “Do strength training guarantees muscle development, weight loss and greater flexibility. The best option? Incorporate both options into your exercise routines to have a slim, toned and healthy body.”

Kendall Jenner Flaunts Fit Figure In Skintight Athleisure: Photos

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PHOTOS Source: Sean Thomas/Courtesy of Adanola/Mega Kendall Jenner debuted her brunette bob in November 2024. Jan. 9 2025, Published 6:01 pm ET When it comes to campaigns, Kendall Jenner always kill it! The model looked stunning while starring in a photoshoot for Adonala’s new activewear collection. Article continues below advertisement Source: Sean Thomas/Courtesy of Adanola/Mega The model looked stunning as she posed for her partnership with Adanola. Article continues below advertisement In photos obtained by OK!the 29-year-old rocked her brunette bob — which she debuted in November 2024 — while posing in a variety of sporty selects at a Los Angeles studio. In one of the snaps, Jenner raised her arms to show off her toned tummyas her white sports bra peaked out beneath her sweater. Article continues below advertisement Jenner showed some skin in another image while peering over her shoulder in an open-back outfit with a blue sweatshirt tied around her slim waist. An additional photo saw The Kardashians star modeling a royal blue T-shirt and leggings workout set, which tightly hugged her legs and arms to accentuate her fit body. Article continues below advertisement Source: Sean Thomas/Courtesy of Adanola/Mega Kendall Jenner rocked an open-back athleisure style in a recent photoshoot. Article continues below advertisement The fashionable collection — which is priced from $38-$130 — featured touches of nostalgic styles from the ’80s and ’90s and could easily be transitioned from athleisure to streetwear in seconds. In a press release about the partnership, Adanola founder Hyrum Cook praised: “Kendall represents the modern Adanola woman—effortlessly stylish, adaptable, and always on the go.” Article continues below advertisement “We’re thrilled to have her bring our vision for this collection to life, as she perfectly embodies the blend of form and function we strive for in every piece,” the statement continued. Jenner shared a video of the campaign to her Instagram profile on Tuesday, January 7, alongside the caption: “hiii @adanola.” MORE ON: Kendall Jenner Want OK! every day? Sign up here! Article continues below advertisement Source: Sean Thomas/Courtesy of Adanola/Mega Kendall Jenner’s leggings perfectly hugged her fit physique. Article continues below advertisement Article continues below advertisement In her campaign with Calzedonia, Jenner wore nothing but a pair of tights as she hid her chest by holding her bosom with her hand or bending down so her legs covered her exposed intimate area. As the creative director of FWRD, the A-lister shockingly went braless in a see-through black dress for her shoot with the brand released earlier this month. Article continues below advertisement Source: Sean Thomas/Courtesy of Adanola/Mega Kendall Jenner showed off her flexibility while doing a backbend for her latest campaign. Article continues below advertisement Jenner’s nipple could be seen through the sheer fabric in one photo, while her cleavage was put on full display in another. In a different snap from the January 1 drop, the reality star donned a silk slip dress and seductively posed with a wet-hair look. When Jenner’s role with FWRD was announced in 2021, the 818 Tequila founder explained: “(This position) means an additional step in my journey with fashion, where I can work with the brands and creative teams I have admired in fresh, new ways. “ “I see this as a great opportunity to put what I’ve learned into practice, and most likely learn even more,” she added at the time.

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