lack

Before the lack of steel, the ships of World War II began to be built with an unusual material: concrete

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Close your eyes and think about the main material of a ship. Quite possibly Wood is the first Let it come to mind, and it is normal: we have millennia sailing in wooden ships, and we continue to do so. But it is also logical that the steel that dominated the XX and XX shipsand the Current marine monstersit is around ideas. And most likely you have not thought of another material: the concrete. But yes, for 150 years we were creating concrete ships, and far from crazy, it was the most logical idea. And even used in the first and Second World War. A Frenchman. A good day from the mid -nineteenth century, a French man named Joseph-Louis Lambot It occurred to him to build a boat. Not anyone: one of reinforced concrete. There was a problem: in 1848, they had no idea what reinforced concrete was. This material, basically, is the mixture between concrete and steel. Both combine to create something with much greater structural resistance and has been since their invention the basis of the most imposing, dams and almost any construction of the last century. Well, it was Joseph-Louis that came up with the two materials. At least, I know attribute The invention of reinforced concrete to this man. As always, there is controversy with the dates, with whom he patented the reinforced concrete, who built the first slab, etc. But well: Lambot wanted to prove his invention and built a small boat less than four meters with the aim of exhibiting it in the Universal Exhibition of Paris of 1855. Enough advantages. Basically, the interior was wire mesh covered by cement and Lambot’s idea was to completely replace the wood. The invention liked it, but it really did not attract the attention of ship manufacturers. Some barges were created for European channels, but little else. Everything changed when the Italian engineer Carlo Gabellini built the Liguria in 1896. It is the one we consider as the first reinforced concrete ship designed to navigate on the high seas. And, really, it made sense to create reinforced concrete ships. It is a material that has great corrosion resistance, so the marine environment does not damage the helmet, reducing maintenance (that also has it) and extending its useful life. It offered good thermal insulation, so perishable resources could be transported in better conditions and there were no fire problems. The Namsenfjord In the absence of bread … A few years later, the construction of these concrete ships expanded and other countries began to build, especially freighters. But of course, we are in 1914 and that means something happened: the World War I. And beyond the advantages of concrete against other materials, the world was forced to create concrete ships for a very simple reason: There was no steel. The militarization and industrialization of the belligerent forces caused a situation of Steel shortage. The ships were important, since the naval supremacy It has always been a determining factor in a conflict, but with the steel necessary for a destroyer you could create many other things. And the problem is that they had to continue building ships because there were resources to move worldwide. World War I. The revolution came with the Namsenfjorda Norwegian ship that, in 1917, showed that self -propelled concrete ships could be made. It was 26 meters in length and weighed a whopping 400 tons and most importantly: the United States saw that there was a potential in these ships beyond serving as charges propelled by an auxiliary ship. Thus, they created the Emergency Fleet Corporation program with the aim of producing 24 concrete ships. It was a failure: those who completed themselves, did it after the war, so it had to be allocated in other things. One was the SS FAithwhich was going to serve in the war, but in the end it remained to be used in transport work in the United States. It was thrown in 1919, it was in service until in 1921 it was sold to Cuba and had a length of 97.54 meters. A year after Faith, the SS Selmaa huge reinforced concrete mole of 129.54 meters in length that was launched just the day when Germany signed the Treaty of Versaillesending the First World War. It ended up using as a oil tanker in the Gulf of Mexico. With candles and a secondary support motor Demolish disadvantages. With the finished war, interest in the construction of concrete ships deflated. It still had advantages, because building them was much cheaper than making them in steel or iron, but if we mentioned a series of advantages, it is important to know the disadvantages (which exceed them, and by far). To match the resistance of a steel helmet, the concrete is thicker, which has several limitations. On the one hand, it weighs more, so it also has a major draft, the displacement of the ship is slower and more fuel is needed. That is thicker implies that there is less interior space for load, since the useful volume is reduced. That weight makes engines must be more powerful and that fuel tanks are also greater, so the investment in this part is greater. The dike to build it must also be monstrous because you cannot weld parts, such as steel, and then there is resistance to impacts. Second World War. The metal breaks, yes, but it has a greater elasticity than the concrete. This material, however, is much more fragile to impacts. A collision causes a crack in the helmet, and this on a ship that weighs so much is a conviction. That is why, after the great war, the concrete ship project was abandoned, leaving its construction practically limited to the loading barges, but then World War II arrived, and the steel needs of the previous one were repeated. However, the US program was not as ambitious as the one that began 20 years before and yes, concrete ships were … Read more

The lack of protein represents a risk to our health. These are the key symptoms to identify it

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We live perhaps in him historical context of greater food abundance. It is difficult to find an era in which we have had a greater variety of food at our disposal. This is especially true for meat and fish, two of the main sources of protein. In general, today We consume more proteins than we needbut the general does not always apply and The lack of protein It can also occur in some people, for example cases of certain diets or between people suffering from certain autoimmune diseases. That is why we can ask ourselves, how can we know if we are not consuming enough proteins? Proteins are one of the three macronutrients considered basic for the proper functioning of our body, the other two fats or lipids, and carbohydrates. We associate these nutrients to meatfish, milk products, but are present in one way or another (in their constituent blocks, for example) in a multitude of foods such as legumes or soy. Proteins, although we put them in the same group are not a homogeneous group of compounds: our body has thousands of protein types. Of course, all of them are composed of a series of amino acids chained 20 of these “blocks” are enough to form this myriad of proteins in our body. Our body is able to synthesize 11 of These amino acids But for the other nine, called essential amino acidswe must obtain them from food. For this we need proteins: our digestive system breaks them down in amino acids so that our body can rebuild them according to their need. We call “Complete proteins“To foods containing all essential amino acids. A list of food with complete proteins would include meats such as beef or chicken, fish, eggs, dairy, soy or quinoa. If our body does not consume enough proteins or other amino acid sources, we can fall into the lack of any of these nine essential amino acids, so that our body can lose the ability to generate its own proteins which results in problems such as the Hypooproteinemiathe lack of protein in the blood. Symptoms Before the lack of proteins becomes a problem, we can pay attention to some symptoms that alert us to lack. Health experts from the University of California in Los Angeles They prepared a time ago a list With six indications that can help us detect the lack of protein. In the article they explain that fragility in hair and nails is sometimes the first sign of a protein deficiency. Another sign is in the feeling of weakness and hunger. Hunger usually indicates the lack of food, sometimes it can also indicate a more concrete nutritional lack. A third indication is in our immune system. The lack of protein can limit our body’s ability to defend against external threats so we can find ourselves more sickly due to this lack. The lack of protein can also manifest in changes in humor or difficulties in thinking. This is due to fluctuations in blood sugar levels and the effect of proteins in brain neurotransmitters responsible for regulating our mood. The fifth indication indicated by these experts is muscle weakness. Proteins are indispensable to build and repair muscle mass, without it we can end up losing it. The last of these symptoms is in the Appearance of fractures by stress in the bones. The integrity of these also depends on this type of compounds. Proteins are fundamental to our body and the difficulty in creating new molecules can cause us problems of very diverse type. As usual in nutrition, excess can also be linked to some problems. Some estimates calculate that excessive protein consumption may appear if we take more than two grams daily per kg of body mass. A varied and healthy diet is key to avoiding problems both by excess as defaultin regards to proteins and with regard to any other nutrient. This is especially important for those who, by their own or for health, must eliminate some usual piece of their menu. No food is essential but there are nutrients that they are. In Xataka | Proteic fever has invaded supermarkets. The problem is how they suggest that we take proteins Image | Shayda Torabi

Lack of motivation is a problem for productivity. The trick to avoid it is simple according to science: start

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Complete your goals and be more efficient with your time, both work and personal, may seem a complicated challenge, especially when procrastination is An incombustible threat that gets in your path. Use small tricks for Encourage your motivation which serves as gasoline for Maintain productivity You can make a big difference in how you face your daily tasks. These are four strategies that can help you maintain your motivation and prevent distractions from moving away from your goals. Completing tasks is already a motivation for your brain According to Manu KapurProfessor of Learning Sciences and Higher Education at the ETH of Zurich and author of ‘PRODUCTIVE FAILURE‘, “We like to close paths. We like to finish what we start. In fact, we have a strong affective impact by completing what we have worked in “, He countedProfessor a Fastcompany. This is corroborated by Zeigarnik Bluma Studies In 1927, which gave rise to the call Zeigarnik effect A condition of the brain that prioritizes the retention of that information you need to complete a certain task. On the other hand, Maria Ovsiankina complemented Zeigarnik’s investigations in 1928 demonstratingThe natural tendency of the brain to finish those tasks that you have already started, Even when it is not mandatory to do so. He does it for an unstoppable need to close a door that was kept open. Therefore, one of the Keys to maintain motivation To complete the tasks it is simply starting them. Take the first step. This is what Mel Robbins, speaker, creator of the podcast The Mel Robbins Podcast and author of the book ‘THE POWER OF THE 5 SECONDS: Be brave on a day to day and transform your life‘called in Your Ted talk“Activation energy”. According to Robbins, the greatest ally for procrastination is immobility. Once You dedicate two minutes to a taskthe brain itself finds tools to stay in it until you finish it. 1- Divide tasks One of the reasons why procrastine and the motivation to face tasks is lost is the overwhelming feeling that The task is too big. The solution could not be simpler: divide it into smaller and more manageable tasks. This approach uses what Psychology experts Teresa M. Amabile and Steve J. Kramer have called “effect of progress.” In their research they analyzed thousands of employee labor newspapers and found that progress, even incremental, in their tasks is the most important factor to maintain labor motivation. Every little achievement achieved release dopamine in the brainwhich activates a sense of reward, thus increasing the levels of motivation. Therefore, these completed tasks have a positive effect on emotional state and motivation, which increases productivity and commitment. Amabile and Kramer’s studies are the key that demonstrates the importance of dividing large goals into small steps to promote a constant sensation of progress. 2- Look back helps continue If the task is longer than expected and you see that your motivation begins to falter, Kapur recommends Change the work perspective That you have to do, on the path you have already traveled. “If you are very far from your goal of swimming 20 lengths, you can say: ‘I came to swim a long one. I have already made five more.’ This system is known as the gradient effect of the objective, and is a concept in psychology and motivation that describes how people tend to increase their effort and motivation as they come to achieve a goal. This phenomenon was initially studied by the Psychologist Clark L. Hull In 1932 and is widely applied to areas such as human behavior, marketing, productivity and personal goals. A 2006 study Made by Kivetz, Urmininsky, and Zheng for the field of neuromarketing, revealed how consumers accelerated their purchases to complete rewards programs. In addition, research in the workplace have shown that, when employees come to complete a project, Its approach and productivity tends to increase. Especially when you are at the beginning of the task, you can fall into the trap of looking towards an objective that obviously still remains far. That perspective acts as a brake for the first advice we gave you, so, to mitigate it, it is much more motivating to take a look at all the work you have already done and put it in value, in front of which it still remains to be done. 3- The fallacy of the sunk cost Have you ever continued seeing a mediocre series or reading a book just because you have already started? Is what is considered Sunk cost fallacywidely cognitive bias studied in psychology and behavioral economy. It refers to the human tendency to persist in a decision, activity or investment simply because we have already dedicated time, money or effort, even when your continuation It is not rational and leads to losses additional Now imagine that, after many years of study, dedication and efforts, you are in a job that is not what you expected and It bores you tremendously. The fallacy of the sunk cost can make you believe that, since you have dedicated so much effort and dedication, you will not change work area to something that, perhaps, motivates you much more. As his own name says, it is a fallacy. The “sunken cost” that represents the training or work done to reach your position is not something that is going to be lost, but adds points to your personal account as an experience, skills and knowledge that can be used in any other sector. “Each recognition is valued and the effort is celebrated. The student realizes that it does not start from scratch, he has relevant previous knowledge, but that they need to be activated, extracted and registered in his mental progress,” says Professor Kapur. 4- The final sprint Have you wondered how a marathon corridor, after having given everything for more than 42 km gets enough energy to tighten the rhythm in the last meters before the goal? It is the power of motivation that drives the brain to end … Read more

It has rained 143% more than normal and Spanish agriculture has suddenly entered into crisis mode. They do not lack reasons

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After more than 20 days of continuous rainfall and four huge high impact stories, peninsula floors They are practically saturated. And it should not be a surprise: the amount of water that has fallen has been 143% above Normal. And, although it may seem good news, it doesn’t always rain to everyone’s taste. Isn’t it good news? At the agroganadero level, there are many farms to which this Borrascas festival has been very good: vineyards, olive groves, nuts, dryland cereals and, in general, the livestock that feeds on pastures. But the field is much bigger. Andalusia It’s a good example. Only in the province of Seville, sunflower, chickpea, pea, cabbage and grelo have been affected. But there are more: the red fruits of Huelva, the pepper, the cucumber, the watermelon and the melon Almeria or the lettuce, the broccoli and the Murcian cauliflower. This is going to add the Granada asparagus if the situation is maintained. But why? For a concatenation of factors, of course. Floods have drowned many sown (with “root, gangrene and fungal asphyxiation problems”); The low temperatures are slowing down the development (when not burning) numerous crops; and the lack of labor (or the impossibility of working on lands) prevents the necessary works – or even collection. In figures, According to news four“Farmers find only 15% production.” So much so that a few days ago the Andalusian farmers sighed for just 15 days of sun. And what will happen? If everything goes well (that is, if everything goes as expected) nothing should happen. It is true that the situation has been harmful, but if the time is normalized and without water restrictions, the campaign is in time to save. If the “anomalous” situation lengthens, we will have a problem. However, whatever it is, it is very possible that we notice the break in the supermarket. A couple of years ago, Europe He ran out of red pepper For a cold wave. What has happened is very similar. Right now, there are a dozen products that play with the breakage of the supply. In case climate change I would not assume enough problemsnow it is stubborn to mess up the stations. And that, of course, is a challenge for one of the key sectors of Spain. Image | Markus Winkler | CHANDLER CRUTTINGE In Xataka | “Not a crop is saved”: Spain is about to discover in its flesh the effects of water scarcity

The problem of Ukraine is not just the lack of weapons. USA has a “button” to deactivate the artillery already sent

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In just one week we have heard Up to two plans Very different from Europe to defend Ukraine. In between, the old continent has even reached Talk about rearma After years of “peace.” All this gives an idea of ​​to what extent there is a dependency of the American Arsenal and Intelligence. It is not just that Washington Medites pause the help. It could paralyze the already sent. The dependence problem. The abrupt retirement of military support from Ukraine has turned on the alarms Among its European allies, who begin to question their strong dependence on American weapons, software and maintenance. Even how far it goes. I counted in a extensive reporting the Financial Times That the situation remembers the fall of Afghanistan in 2021, when the American withdrawal left the Black Hawk helicopters of the Afghan army unusable, precipitating the fall of Kabul in a matter of months. Now, with Trump redefining foreign policy towards a more conciliatory position with Russia, European countries that have based their defense in US military technology face a structural vulnerability that could compromise their long -term safety. But there is more. The “off button.” For a long time, but now more than ever, there has been talk of those alleged “switches” capable of Turn off military technology that reigns in current conflicts. In fact and in European key, one of the greatest concerns is the possibility that the United States can deactivate remotely Advanced military systems through software, many of them already sent to Ukraine. An example: a team that needs remote update could become useless not to get the data. Although there are no conclusive evidence, told Financial Times Richard Abouulafia, an expert Analist at Aerodynamic Advisory, that “if something can be done with code, then there is.” However, the European agency goes beyond a possible “Kill Switch”, since, without spare parts, software updates and logistics support, that “button” is already in many weapons that would be inoperative in a matter of weeks. The level of dependence. The story takes us to the output grill. The European military agency in the United States has increased dramatically in recent years. Between 2019 and 2023, 55% of imports European defense came from Washington, in front of 35% In the previous five -year period, According to the International Stockholm Institute For Peace Research (Sipri). In fact, this respect, the former Secretary of Defense of the United Kingdom, Sir Ben Wallace, warned that, if he were still in office, his priority would be Evaluate military units from Europe and determine if a strategic change is necessary to reduce vulnerability to Washington decisions. The example of F-35. He F-35 hunting It happens to be the most advanced combat plane in the world, but also a clear symbol of European vulnerability. The reason? The plane depends completely on United States Logistics Supportincluding software updates, missions planning and threat databases through the Autonomic Logistics Information System (ALIS), which is being replaced by the Odin Network (Operational Data Integrated Network). That “button” we were talking about is there, and although Europe physically possesses the combat plane, it can become obsolete. Nations in problems. Countries like Denmark, which have considered deploying F-35s in Greenland, could find a critical problem: if the United States decides to withdraw their access to support infrastructure, These airplanes would be inoperative. Even before the Trump administration, the United Kingdom, one of the main buyers of the F-35, demanded “operational sovereignty” on their fighters, achieving Certain concessions in 2006. However, no ally has access to the system source code, which keeps Washington with Absolute control. For its part, Switzerland has tried to reassure its population by stating that its F-35 fleet can operate “autonomously”, but He also admitted that no western hunting can work completely without safe communication systems and satellite navigation of the United States. The British nuclear weapon: another example. We told yesterday. The United Kingdom’s nuclear deterrent system is also closely linked to the United States. As? Your strategic submarines use Trident Balistic Missileswhich are leased to Washington and require periodic maintenance at the King’s Bay Naval Base, Georgia. Although analysts consider unlikely that the United States cuts the maintenance of the TRIDS, Nick Cunningham, an analyst at Agency Partners, argues that The system remains “A critical point of vulnerability to the United Kingdom.” Some experts suggest that London should evaluate alternatives, such as French M51 missilessince France and the United Kingdom are the only nuclear powers in Europe. Intelligence and surveillance, also “mortgaged.” If we raise the framework the scope of American power is amplified. Much of the intelligence, surveillance and recognition capabilities (ISR) in Europe They depend on collaboration with the United States. Countries such as the United Kingdom, Norway and Germany use American spy airplanes and drones that require Washington authorization to be armed or deployed in offensive missions. For example, Italy and France faced a long approval process to equip Your reaper drones With missiles, demonstrating how the United States maintains control over the weapons of its allies. Plus: true fear in Europe is not only the possible loss of individual systems, but the possibility that the United States withdraw logistics support and intelligence Shared in the middle of a conflict, which would affect the operation of fighters, Chinook helicopters and Apacheas well as air defense systems such as The patriot. The beginning of a break in the western alliance. It is the last of the legs to be treated. The growing distrust in the reliability of the United States as a strategic partner could have devastating consequences for the American defense industry. For decades, Washington has used the promise of military protection and cooperation to ensure the sale of its weapons, but the recent decision of withdraw support to Ukraine He has sown doubts about the sustainability of this promise. There are data that already corroborates it. The actions of the main US defense companies They have fallenwhile European manufacturers have experienced A boom after Trump’s re -election. … Read more

Some researchers have created a pill that mimics the effects of the lack of oxygen. They have a good reason

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Height evil is one of the problems that professional mountaineers and occasional visitors who decide to ascend to certain altitudes must face. This disorder is related to the lack of oxygen, hypoxia, which occurs in these environments, but now a pharmaceutical company wants to turn it around. Turn that “evil” into a “good.” Hypoxystat. Transform the mountain air, or rather, the absence of air of the mountain, into a pill It is the proposal of the Gladstone Institute and Maze Therapeutics laboratories. The new drug has received the name Hypoxystat and its goal is to fight against metabolic disorders such as Leigh Syndrome. Mountain air. It might seem crazy idea, but reducing the amount of oxygen that enters our body can make sense in certain senses beyond high performance sport. Living in a mountainous area can benefit people with Leight syndrome, a mitochondrial disease that affects childhood. This disorder occurs when the mitochondria, the organelle in charge of feeding the rest of the cell is not able to consume all the oxygen it receives. This leads to a dangerous accumulation of oxygen that ends with cells and tissues and, ultimately, with the patient’s life. “It is not practical for each patient with this disease to move to the mountains,” Explain in a press release Isha Jain, who has led the recent study of the drug. “But this drug could be a controlled and safe way to apply the same benefits to patients.” 2016. Almost a decade ago, a team, in which Jain herself participated, discovered that mice with this syndrome responded well when they were exposed to air with a lower amount of oxygen, the equivalent of that which can be found at heights of 4,500 meters (a upper altitude in almost a kilometer to the Teide peak). The lack of oxygen caused it to stop accumulating in the cells. The new compound could achieve a similar effect in a different way: focusing on hemoglobin, the molecule that transports oxygen in our blood. The new compound causes oxygen to be linked more easily to hemoglobin which may sound contraintuitive, they explain. However, this fact also makes it difficult for the molecule to deliver oxygen to the cells of our body. Concept test. The new drug has been developed Maze Therapeutics to fight anemia. The Gladstone Institute team, from the University of California San Francisco, found the substance when looking for a compound capable of reinforcing the bond between hemoglobin and oxygen. As a treatment, Hypoxystat is still in early development, but has already begun to succeed in mice. The details of these tests have been published recently in an article in the magazine Cell. Promising results. Although for now the studies are limited to rodents, they invite cautious optimism. The team observed, for example, that the compound had therapeutic capacity both in cases where it was administered before the appearance of symptoms and in cases where mice were already in advanced stages of the disease. In Xataka | We did not know why some superbacteria were resistant to antibiotics. This AI has found it in two days Image | Gladstone Institutes

Before the lack of crew, South Korea is developing ships with AI. And the US has already taken their eyes

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We have the whole day in the mouth. If a product does not have ia, it is not fashionable, and Despite loud recent failuresit seems that artificial intelligence It has come to stay and conquer it practically everything. A segment in which it has a lot of potential is in the improve autonomous capabilities of vehicles, especially in countries in which human workforce is increasingly scarce. This is the case of South Korea, which is promoting Autonomous ships up to ia To replace the lack of crew. But there are already those who look with sweet eyes thinking about applications in the military industry: United States. Samsung with Ia. Now in ships. South Korean national pride is Samsung, a company that recently presented its smartphones Galaxy S25 and that has been uploaded on the artificial intelligence ship. Samsung is a giant company that makes consumption technology much more. Both the main company and its subsidiaries have businesses in sectors such as construction or biotechnology, and one of them specializes in ships. Samsung Heavy Industries, or SHI, is one of the three large ship builders in the world, focusing on the construction of ships for special tasks such as ultragrandes ships, very specific transport ships, offshore platforms and navigation systems. One of the last projects in which it is involved is that of construction with ships equipped with autonomous navigation system thanks to AI. Ok, catamaran! Conducts. How can we read in Nikkei Asiain November last year, Shi tried a 12 -meter -long catamaran on Geoje island, south of South Korea. This ship could transport 12 people and its crew had a task: give voice orders to the ship. After scoring the route, he was dedicated to following the ‘line of points’ and details such as speed or obstacles were shown in real time on a screen. From the control center you can monitor your parameters thanks to the installed cameras, as well as make adjustments, but the AI ​​developed by sister Samsung Electronics is the captain of the ship. Government facilities. A wall against which there were companies like Samsung or Hyundai when trying autonomous vessels is the law. According to the Asian media, the regulations made it difficult for companies approved A law that precisely facilitates obtaining permits to perform tests in the real world. The reasons were not specified, but having South Korea one of the most alarming demographic situations on the planet And facing –Like Japan-, to the lack of workers in certain positions, an autonomous or semi -autonomous vehicle sounds like a good idea to alleviate the situation. Realizing Japan again, we have already seen even Robots with chainsaws to set the train tracks. Taxi! We mentioned Hyundai, since it is another of the great South Korean and, through Hyundai Heavy Industries, this year they will test an autonomous aquatic taxi in Busán. The idea is that the passenger introduces the destination, at which time the system will look for the ideal route and begin to travel it. Apart from the systems to recognize the environment thanks to 3D cameras, the idea is that you go accurately at the destination dock, ready to release a passenger and receive another. Returning to Samsung, the next steps of this project include tests to avoid collisions, as well as Improve satellite communication To be able to develop this pilot as something on a large scale. Satellite communication is another technologies that seem important to the company. The US looks carefully. Samsung has a key advantage: you can design and build these ships from scratch, integrating its own autonomous navigation technology. That is, with their naval experience, they can design a ship from scratch that includes the autonomous navigation systems that they provide from Samsung Electronics, being a more accurate solution than to place those navigation systems on a ship that is not specifically designed for it . And who is already looking closely at these advances is the United States, but not any aquatic taxi department, but the Department of Defense. In one call From Trump al, now dismissed, South Korean president Yoon Yeol, President Electro recognized the capacity of South Korea in the construction and maintenance of ships. Clue. South Korean ports are becoming a key to the US presence in the South China Sea and local media claim that contracts between South Korean and US companies have increased recently. It is a fundamental strategic enclave, especially in a scenario in which China is performing maneuvers that their adversaries watch closely. Beyond this, and seeing that Samsung is not the only one who is betting on autonomous ships, it is expected that we see a flourish of this implementation of AI in this type of vehicles in the coming months. Image | Shi In Xataka | This is the Zhu Hai Yun, the new ship of China: capable of navigating without crew and full of aerial and sailor drones

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