Not all programs in YSFLIGHT.COM are open source. But, you can download some of the source code from the following URL.
When you try to run a program downloaded from this web site, you may see a warning like "This program is not digitally signed." Code signature was invented for improving the computer security. However, it added a new (and evil) purpose now, which is to decimate individual developers like myself. A code signature used to be unreasonably expensive. But, now it is not just expensive. No matter how much money you pay, a code signature is not issued to an individual programmer. It is obviously an infringement of freedom of publishing a software. But, I can do nothing about it. My main job as a programmer is secure even if one day I cannot publish a software, but what a boring world would it be?
And, I am deeply concerned. As far as I understand, this disease is not too much to be worried about AS LONG AS THE HOSPITAL SYSTEMS ARE NOT OVERWHELEMED. Doctors are learning more about this disease and get experienced to make it less fatal. But, when the doctors' hands are full, some patients will die untreated.
We did all this lock-down and stay-home not to overwhelm hospitals. And, now people are coming out wearing a mask, which is good, but I see too many people wearing a mask not covering the nose.
If you are living in Pittsburgh, and if you are willing to reduce risk of overwhelming UPMC, AHN, and other hospitals, please learn the right way to wear a mask and cover your mouth AND NOSE!
What a month! The world has changed. I still understand that this Coronavirus is as dangerous as a common cold or a flu to the most of the people, as long as the medical system is functioning. I initially was thinking that the solution would be strictly separating high-risk population and low-risk population, and driving the economy by the low-risk population. Similar to the initial idea of British Prime Minister Jonhson. But, if medical experts tells it is impossible, then it should be impossible. I'm not a medical doctor after all. At this point, what an individual can do is to do the best not to catch the virus, if not to delay catching it as long as possible.
One thing we have learned by now is that Coronavirus is different from a common cold in the virus's survivability. It stays infectious for pretty long time on the surface of plastic and metal. We were believing plastic-wrapped thing is hygienic, but it now may be working as a medium to spread the virus. We clean whatever we buy before taking into the room. I was worried about running out alcohol, but we were able to get some bleach over the weekend. It should last at least for another two to three months minimum.
Although we are hearing bad news a lot, several medicines are being tested. Since its fatality rate is so low, if the medicine is effective only 30% of the time or so, it would substantially reduce the burden of the medical system and make a massive difference. This virus won't go away soon, but I believe we have a good chance that we can keep it under control in reasonably near future.
Also still we do not know actual fatality rate, which potentially is lower than what we are hearing now. The fatality rate we are hearing now is the rate among those who were tested positive for the virus, not the rate among all infected population. Recently a new symptom, loss of smell and taste, has been added. Until then nobody suspected loss of taste or smell could be from the Coronavirus. Probably hundreds of thousands of patients already had Coronavirus and recovered without even knowing they had it. You can see it scary, but I see it as a hope. If thousands of people already have immunity, we might see mysterious decline in the newly infected patients.
Let's keep up the hope and do what we can do.
I think it is a significant development. I don't know why major US news media doesn't report it. I looked at other news but the effectiveness has been observed both in Japanese and Chinese clinical studies. In fact, if it shorten or reduce the severity/fatality rate, it would substantially increase the hope to get through this pandemic.
The above link is Japanese national boradcast station NHK.
Of course, it warns about side-effect of birth-defects, but not an issue for elderly people.
Let's hope more treatments will be found quickly!
Carnegie Mellon University also will transition to all lectures to online-lecture next week. I thought it was too much, but I changed my mind. Online lecture can be a very smart way of battling this Coronavirus. Online-lecture systems have been developed long time and ready to use off the self. At this point, we need to find a way to live close-to-normal life while assuming that the viruses are around us. The reason of the low fatality ratio in the developed country is thanks to the functioning medical system. If we overwhelm the system, it's going to be worse. Online-lecture can be a good way to live close-to-normal life while reducing the number of patients.
I was thinking it is impossible to stop spread of this virus in Japan anyway, but Japan is doing pretty good job at this point.
At this time the fatality rate in the U.S. is 3%, and in Italy scary 6%. Experts point that in Italy light-symptom patients and non-patients stampeded to the hospitals and overwhelmed the medical system. I hope the same thing won't happen in other regions in the world.
I am still optimistic. As long as we don't overwhelm the medical system, developed countries should be able to keep the fatality rate very low. 0.5% in South Korea, from the last number I saw. South Korea did a comprehensive tests (which might risk infections among the people come to the test center), so this number would be a good estimation. I was expecting lower number though. Maybe I was too optimistic. Also my expectation that the virus will fade as the weather gets warmer might be too optimistic considering infections were reported in Australia, which is warm right now and has good medical system. But, I at least expect the speed of spread in the northern hemisphere may slow down soon.... (Well then we need to be worried about southern hemisphere soon)
Already multiple vaccines are being tested. It would take a few more months, but once we find an effective vaccine, we can start with high-risk population first, and that would substantially reduce the fatality.
I have no idea what's the world is thinking about Corona Virus. I thought the number coming out of communists should be interpreted by multiplying by 10, but probably the fatality rate could be taken as is. From the beginning the it was indicating very low fatality rate. As the new data coming from other more trustworthy countries, the fatality rate among the patients are staying less than 2%. In developed countries, it seems to be even less than 1%.
Some news sources say majority of the patients even get no symptom. In an interview in a TV news, a person was saying it's scary because he could be contracted without even knowing. Seriously? Where is the logic? The data is just implying that this Corona Virus is spreading out-of-control, but it's harmless for the majority of the population.
I am not in a medical school, but from what I am hearing I can say at least:
Corona Virus is dangerous to elderly people and persons with background health condition. It can be fatal to younger generation whose vital is weakened for some reason. Unless otherwise, you have less than 2% risk of being killed by the virus.
Common Cold is dangerous to elderly people and persons with background health condition. It can be fatal to younger generation whose vital is weakened for some reason. Unless otherwise, you have very small risk of being killed by common cold.
In regions without sophisticated medical-care facilities, Corona Virus patients may have less chance of survival, and therefore may show higher fatality rate.
In regions without sophisticated medical-care facilities, Common Cold patients may have less chance of survival, and therefore may show higher fatality rate.
If you caught a sign of Corona-Virus symptoms, see a doctor if the symptom is severe. If not, hydrate yourself, take nutrition, take good rest until you fully recover. Forcing to do work would increase the severity, even may lead to death.
If you caught a sign of Common-Cold symptoms, see a doctor if the symptom is severe. If not, hydrate yourself, take nutrition, take good rest until you fully recover. Forcing to do work would increase the severity, even may lead to death. (Don't underestimate the danger of common cold!)
When Corona Virus is spreading, you should wash your hand often, avoid directly touching door knobs, elevator buttons, or anything that other people could touch. Avoid crowd, cover your mouth when you cough or sneeze. Those will substantially reduce the probability of catching or transmitting Corona Virus.
When Common Cold is spreading, you should wash your hand often, avoid directly touching door knobs, elevator buttons, or anything that other people could touch. Avoid crowd, cover your mouth when you cough or sneeze. Those will substantially reduce the probability of catching or transmitting Common Cold.
To avoid getting severe symptoms from Corona Virus, you should take good sleep, hydrate yourself, take nutrition, and good exercise.
To avoid getting severe symptoms from Common Cold, you should take good sleep, hydrate yourself, take nutrition, and good exercise.
At this time, I have seen absolutely no evidence, ABSOLUTELY ZERO, that indicates any greater risk of Corona Virus than common cold. I don't understand why the world is so overly reacting to this particular virus. Is there anything that the news media are not reporting? It is true that we should be very worried if the virus mutates and becomes highly fatal. But, that hasn't happened yet, and therefore we don't have to be worried about it yet. We need a vaccine before it happens, and the doctors over the world are trying to come up with a vaccine. The virus seems to be incredibly infectious. It is impossible to prevent spread. If you try to do something impossible, you need infinite energy. Therefore you shouldn't. Rather, the weakness of this virus is its extremely mild symptom and low fatality rate. Then, rather than trying to prevent its spread, it seems to me more reasonable to prevent death of those who got infected and grow population with anti-body. Also it would be impossible to quarantine all those got infected. The infected population will grow exponentially. It would be easier to protect high-risk population, who are elderly people and patients with background health condition.
My guess on what's going to happen next is the disease disappear by itself by spring. First when the environment gets warmer, our immune system will kill viruses more effectively. Also by then certain rate of people will acquire anti-body, and the virus won't be able to spread as easily as it can right now. Some doctors are telling many of those who got infected do not show any symptom. What it means is the population with anti-body might be growing rapidly, but we just don't know about it. If you are healthy at this time I don't think you have no reason to be worried about this extremely weak virus which is pretty much harmless except it is highly infectious.
It was reasonable to attempt to prevent the spread when we didn't have those data about the virus, but now we know that its fatality rate can be less than 1% if treated, and majority of the healthy population won't get a severe symptom from it. The reaction should be according to what we learned.
One thing remarkable this time is that communists are broadcasting their over-reaction to the world. Communists typically hide and conceal whatever bad news from the rest of the world. One thing that is their business as usual is they are spreading a wrong information. They want the world to view this mostly-harmless virus as an extreme danger. What's their purpose?
For you, what to do? Just take same precaution as common cold. Wash your hand, avoid crowd, hydrate yourself, take nutrition, good sleep, and exercise. By the way, I bowled 3-game total of 693 yesterday.
Happy New Year!
I have spent majority of my time during the winter break for Fujitsu FM TOWNS preservation project. It started because the FM TOWNS II MX (originally released in 1993, 28 years old computer!) unit that I bought from Yahoo! Auction came with a bad internal CD-ROM drive. Then I found that many of the working FM TOWNS unit suffers from broken internal CD-ROM drive. I was looking for a way to substitute an external SCSI CD-ROM drive to a broken internal CD-ROM drive, and developed a single driver that does it in November. This is the computer model that I grew up with. I don't let it die without resisting. Then I made some major improvements. And wrote patches to some programs that did not work with my driver. I am thinking to add more patches when I find a game title that does not run with my driver. I think I made a good contribution to the preservation of historic Japanese computer models.
What about YS FLIGHT SIMULATOR development? Sorry, for the past two years, I was spending majority of my free time (aside from bowling and flying) for an effort to preserve Fujitsu 8-bit computer FM-7 series and then 32-bit computer FM TOWNS series. I'll spend time for YSFLIGHT again when this project winds down. Actually I need to upload a macOS version that supports high-resolution mode in OS Catalina. I hope Apple doesn't drop OpenGL support, but if Apple really do that, I'll need to drop YSFLIGHT macOS support until I find an alternative and good graphics library. Vulkan is a crap. I want to ask Vulkan people, if you want that much performance, why don't you write in assembly? Probably less than 1% of the programmers who can use OpenGL will be able to use Vulkan. Absolutely not for education. Vulkan is a crap.
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