Wednesday, August 23, 2017

35-year-old as a turning point for job affiliation

One-sixth of workers who are older than 35 feels unhappy to their job, according to a study recently conducted in the UK.

People start hating their jobs at 35, shows new research

Thousands of the UK workers were subjected in this survey. Meanwhile, less than ten percents of participants answered they were unhappy in the workers younger than 35.

It suggests 35-years-old is a turning point in which people begin to hate their job. Although I have not read the original paper of this survey, this result seems to be consistent with my impression.

There are some reasons why people tend to lose willingness to their work at 35. In middle age, many workers have to change their lifestyle. Some are promoted to an executive position. Some need to take leadership. And, some are forced to compromise their ideology for reward. Also, some face shortcomings of their job and workplace.

In addition, they have to reconsider the life-work balance. Nurturing children is a tough task more than most works. In some cases, parents and grandparents meet the mortality.

In younger age, workers only need to work, obeying the order of their boss. But in middle age, you have to examine the value of your work. Sometimes, you need to change the policy of working. Making a change always brings some kind of conflict.

These various factors make workers at 35 unhappy, even if they are enthusiastic about their job performance.

I am 42-year-old. Reminding my previous decade, I was wondering how to live in later life. Now, I have no regret about my decisions made in the past. Expect for life afterward.

Tuesday, August 22, 2017

Tunnels & Trolls Adventures released

Recently, Gen Con 50, one of the greatest analog game conferences in the US was conducted.

Gen Con 50

Several events were held there. Meanwhile, "Tunnels & Trolls Adventures," an application for playing T&T solo adventures was released for Apple iOS and Android. The provider is MetaArcade.


Tunnels & Trolls, or T&T, is a table-talk role playing game system with a history for more than quarter century. Recently, the 8th edition of T&T rulebook was translated into Japanese. T&T is famous also for many solo adventure booklets. And Tunnels & Trolls Adventures offers you to play several solo adventures on the tablet.

I am quite interested in the app, because the provider has promised to give a chance to create your original solo adventure scenarios on the app. In the near future, users will be enabled to publish their scenarios online. Even earning money for the creator of popular adventures will be realized, according to the provider.

Recently, I published s few solo adventure gamebooks on Amazon Kindle. It is a wonderful experience for me to let my original games played by many readers. I also want to make some scenarios for T&T on this app.

Unfortunately, T&T adventures is available only in the US now. I expect Japanese users will be permitted to release our new scenarios online soon.

Monday, August 21, 2017

IBM Waston's personality test

IBM has developed an AI program which can evaluate your personality through watching your tweets.

The solution named Personality Insights analyzes the words you frequently tweet, categorizing them according to some personality traits. The result is presented as a series of sentences expressing you and some quantitative data.

Personality Insights

This service has been localized into Japanese. I tried it. According to Watson, I am perspective and tend to stick to my own concepts. I am empathetic and philosophic. I accept new ideas. I am deliberate and seldom trust others. On the other hand, I am indifferent to joyfulness in daily life. I do not always respect traditional ideas.

Humm, not bad. In another personality examination, I was deemed to be deliberate, while not so conscious am I.

I predict such AI examinations will be realized shortly. The issue is whether these AI evaluation will overcome the judgment by the human. So far, there are no particular psychological examinations which are superior to the impression of familiar persons. When the AI decision-making replaces human's narrative judgment, we will approach the new era.

Sunday, August 20, 2017

Dying together with euthanasia, is it a benefit?

If you are married and love your partner, perhaps you do not want to live without your sweetheart. It is said to the best ending that dying together at the same day.

But, it is extremely difficult. In general, women have longer life expectancy than men. In the ending stage, one person often has to care the other for some years.

Also, left children will suffer from the management afterward. I know a person whose parents died on the same day, not due to an accident. She needed to deal with the heritage of her parents. It was a quite tough task, said she.

And now, there is an ultimate solution in Holland: the euthanasia. If you decide to take a euthanasia, you and your children can prepare for the death and the after care in advance.

The Washington Post: Elderly couple got ‘deepest wish’ — to die together — in rare euthanasia case

Nowadays, long living itself is a risk for you and your offsprings, unfortunately. While there is a broad discussion about the ethics around euthanasia, we will be closer to this way of death in the future.

On the other hand, to be honest, I am indifferent to my afterlife. As well, it is acceptable that anyone is not preparing for the death. I wish to be alive longer than my wife. And after her death, I will survive my crippled body for a while with her sweet memory.

Saturday, August 19, 2017

Today's issue of internet security in a Free Wifi spot

There are many free Wifi spots everywhere. They let not only travelers but also anyone makes use of the internet.

Interestingly, Wifi is more developed in some developing countries than developed countries. In Japan, some hotels do not offer free Wifi. There were few stations letting passengers use the free internet. But the situation is getting better, perhaps expecting increased foreign travelers. In the UK, Wifi is not available in some rooms in traditional buildings whose wall is too thick.

Free Wifi spot is considered to be risky. You expose a risk of being hacked, according to some media. But is it correct? The answer depends on your lifestyle.

There are many points to make use of free Wifi with safe. This article below describes them in detail. The author recommends you first to assess your security level and the magnitude of necessity for Wifi. If you have no important information on your PC and the purpose of internet browsing is to check the weather, the security risk would be ignorable. In contrast, you have to carry much sensitive information, you should hesitate to connect to the internet via free Wifi.

The Guardian: Ask Jack: How can I use airport and hotel wifi safely?

Virtual VPN is also a protection against hackers. The date transporting from your PC via VPN is encrypted. But using a VPN is often costly.

The ultimate solution against hacking is using a vanilla PC, according to the author. But I think it is not realistic, even right. Bringing your own pocket Wifi is better.

After all, convenience, security, and cost are mutually trade-off, as the author says. Also, the battle between hackers and security specialists will never end.

Friday, August 18, 2017

Barcelona terror attack

On Aug 17, 2017, a van charged into the field of Las Ramblas in Barcelona, killing at least 12 people and injured more than 80.

International Business Times: Barcelona terror attack live updates: 13 dead after van ploughs into pedestrians on Las Ramblas

This incident has identified as a terror attack because ISIS claimed responsibility. The police arrested a couple of the suspects, according to Catalonia's regional president.

Also, an explosion occurred earlier in this day in Las Ramblas. This case is relevant to the attack. Terrorists often make a small explosion to make people pay attention to the spot they are planning to commit the attack.

I visited Barcelona a couple of years ago. It was a joyful city.

It is a serious crime against peace and the human right. It is fortunate that suspects were arrested alive. I expect the police to clarify the whole figure of this crime. Pray for the victims.

Thursday, August 17, 2017

Freelance as a work style

Nowadays, 35% of working Americans are considered to be freelance. In Europe, the rate is 16.1%. And freelance is gradually increasing.

The Conversation: Is freelancing the future of employment?

Some modern technologies let freelance work at ease according to their abilities. Especially, the internet has enabled many people to get jobs and offer various services to clients at distant. In addition, you can make a receipt and calculate the tax with an application working on a PC or a smartphone. Writers can publish a  series of e-books without an editors or a publisher.

Nonetheless, freelance and self-employed people have some disadvantages at work. The dominant issue is social security. In Japan, most companies offer a pension scheme to employees better than that provided by the government. When you are a member of a team in a company, you can take a vacation for a week without crippling the ongoing task. In contrast, if a self-employed person becomes too ill to continue working, his income will fall into zero immediately.

Recently, there are some insurance systems for self-employed workers. Nevertheless, freelance is still deemed to be vulnerable to troubles at work.

Afterall, the choice of freelance is risky for many people, especially in older age. Therefore, lifelong employment system was spread in Japan.

However, many companies are struggling to adapt the rapidly changing society in Japan. For some workers, continuous belonging to an organization is riskier than being independent of any companies.

Some workers and employers are aware of this situation. Therefore, innovative companies allow employees to be partially independent of the company. Some companies permit workers to develop his own business aside from his main work. BYOD and COPE are also good examples.

The diversity of working style will be the key word of the future. The question Whether freelance is superior to employees is a nonsense discussion. But it is certain that companies which are unwilling to accept various work styles will decline.

Wednesday, August 16, 2017

You need to show the passport to watch porn movie in Russia

Russia banned Pornhub and YouPorn, largest pornography websites. Afterward, Pornhub began to demand watchers to register their social media account in Russia before permitting to visit the adult website.

To acquire the account of the social media, named Vkontakte, you need to register a mobile phone number. And to get a SIM card in Russia, you need to share information from your passport. It means that you have to offer your passport number to the government before watching the adult movies at Pornhub.

International Business Times: Want to watch Pornhub? If you're in Russia, you now need a passport

It sounds absurd to offer your ID when enjoying porn movies. But, there are similar schemes in other nations. I was requested to input my passport number before entering some websites. It was not phishing, but due to the security policy of a telecommunication company.

It is another issue, however, when the counterpart is Russian government. The government can handle all individual's information. When identification is connected to the information of each person's affiliation, our lifestyle will face to the risk of censorship. It is the concern of many people who are afraid of their privacy invaded.

Tuesday, August 15, 2017

Overweight to overfat

Overfat is a relatively new idea to evaluate your health status. Previously overweight was considered to be a great risk factor for physical health. It is correct, but not perfect. Indeed, there are many people with an average body weight at a high risk of cardiovascular disease, according to new studies.

Visceral fat is deemed as the main indication of metabolic syndrome. But it is not easy to examine. Therefore, several methods have been developed to estimate the amount of your visceral fat.

One of the simple and effective ways is to measure your waist. If the value of your waist divided by your height is over 0.9 in men or 0.85 in women, you are at high risk.

The Conversation: Are you ‘overfat’? Here are the best ways to tell

However, this standard seems a little too strict. Many people are categorized in the risky zone with this measure. According to a new study, approximately 90% of men are overfat.

I am not certain about the best standard of your fat. Balanced food and proper exercise are essential to prevent you from metabolic syndrome. But where you should set your goal has not completely been clarified.

Monday, August 14, 2017

Animal identification with a smartphone

There is an application for nature-walk lovers, called "iNaturalist."

So far, this application has offered only a user community. Users can upload photos of animals, birds, and plants. and other users tell what they are. Identifying the name of what you see helps you understand the creature and become closer to it.

Recently, the developer added a new function to this app. When you take a photo of an animal, an AI will tell its name, according to the founder.

The Atlantic: Finally: An App That Can Identify the Animal You Saw on Your Hike

I tried this app. Unfortunately, automatic identification was not available on my smartphone. Perhaps this innovative function is still underdeveloping. Nonetheless, if realized, its value will be great.

There have been some similar attempts already equipped. Amazon's smartphone can identify its products on its camera. And the user can order the object to with one click.

In this region, one of the most expected genres is food, I think. Many people will be very pleased if they can know the calory of the meal in front of them when taking a photo. Recently, I introduced a gadget to calculate the calory of some foods.

My past entry: DietSensor change your diet style?

Wearable gadgets are very suitable to equip this kind of function. Light and simple glasses will be the best gadget in the near future.

Sunday, August 13, 2017

Password ruling should be reconsidered

Password used to protect your internet account is one of the most annoying systems in recent years. Perhaps you have to manage several different passwords in each online service, internet banking, and webmail. In some website, you are encouraged to change the password regularly. Also, you are requested to include some capital letters and non-alphabet symbols.

These rules are considered to be a standard for a safe password. But it was established by Bill Burr in 2003. And now, he regrets these statements.

The Wall Street Journal: The Man Who Wrote Those Password Rules Has a New Tip: N3v$r M1^d!

In real, the longer, the better, to protect your password. On the other hand, when you set a complex password which is requested to be amended frequently, you will hesitate to be serious to adhere to the regulation. Instead, you will make a simple rule for regular change of your password, such as Pa55word1 to Pa55w0rd2. Obviously, this sequence is very vulnerable to crackers.

Recent findings suggest that you should change password only when you feel unsafe. I completely agree with this idea. We often forget the password and demand the service to reset it. The more we request the reset, the more risk of cracking increased. Rather, making the password remembered by Google Chrome or other reliable service providers seems to be safer.

Even now, some service providers demand me to change the password very frequently. Annoying!

Saturday, August 12, 2017

Alcoholics broadened in the US

A recent survey revealed that about 29.5 million Americans are drinking at a risky level. This prevalence was increased in almost all demographics, especially among women, older population, and ethnic minorities.

The surveys were conducted in 2001 and 2012 with a large sample size. The result was published in JAMA Psychiatry, a world famous academic journal.

International Business Times: Alcoholism epidemic in the USA: More than 1 in 8 Americans are now alcoholics

In the US, abuse of marijuana and other addictive drugs are also serious problems. Compared to them, the harm of alcohol is likely to be underestimated. But in the clinician's point of view, alcoholism is a critical issue as well as illegal drugs. Since drinking alcohol is legal, patients hardly identify themselves as an abuser unless the problem becomes fatal. Alcohol does damage to your liver, brain, and other organs more seriously than marijuana, according to some studies.

In the UK and Japan, the prevalence of drinkers is gradually decreasing. The market of alcoholic beverage is shrinking. What is the difference?

Considering that drinking is a leisure for poor people, alcohol consumption is increasing in the society where many unwealthy people live. As well, alcohol is a solution to kill time for people who have nothing to do. In Japan, soon after the earthquake and Tsunami disaster in 2011, alcoholism was spread in the damaged regions. Some people who lost their family, house, and job had no choice but drinking. Some of my colleagues went to the region for the enlightenment of harm of alcohol and social support for the victims.

The US is one of the nations in which inequality among people is most magnificent. Some people, especially in minorities, have no friends or supporters. They are at high risk of alcoholism.

Therefore, the solution should not be limited to the enhancement of medical care for alcoholism. Social setup and increased job opportunity are also crucial to prevent citizens from substance dependence.

Friday, August 11, 2017

E-sports will be played in the Olympic

The International Olympic Committee is considering that e-sports will be included in the subjects in 2024 at Paris.

The Washington Post: Paris mulling inclusion of eSports in 2024 Olympic program

This idea is yet to be realized. It is uncertain some e-sports will be played in 2024 or later. Actually, members of the committee are hesitating to deal e-sports as same as conventional physical sports.

There are several barriers before accepting e-sports. Now, there are no international organizations to authorize the regulation about e-sports. There are many kinds of computer games to be elected as a subject of each tournament.

I think it is preferable to include chess or other analog games for Olympic before e-sports. Chess has already been identified as a brain sport for many years. FDA could administer the convention as an international organization. However, considering the fact that Chess Olympic has been established, the merit of including chess as a subject of Olympic game is not high.

If e-sport is accepted, many young players will dream to be a candidate even if they are not physically talented. I would like to see young players playing games on the world stage.

Thursday, August 10, 2017

Loss of workers in the UK due to Brexit

The UK is preparing for Brexit. Its influence emerges in many aspects.

The most crucial change will be immigrants. Many residents in the UK from foreign countries are reluctant to stay to work there. It brings the unbalance between demand and supply of the job market.

Reports say that the unemployment rate marked the lowest level ever just recently. At the same time, employers feel it difficult to fill the post required to maintain the organization.

International Business Times: UK firms hire staff at fastest rate in 2 years

It means that UK citizens will be in a stronger position to find their job. It is certainly what separatists have wanted. At least in this meaning, Brexit will benefit them.

On the other hand, skilled workers will lack in many regions of work. It will take the time to train British rookies to improve their specialty. As a result, the quality of services will be sacrificed in many industries, perhaps for some years.

It is doubtful whether British society will be maintained without immigrants. Accepting this fact, the government will keep accepting a certain amount of new immigrants. Nonetheless, lack of workers will do damage the community, I am afraid.

Wednesday, August 9, 2017

Uncomfortable airports

On this month, travelers are suffering from uncomfortable wait at the airport.

Following Paris and Brussels terror attack, the EU amended the rule of border control for a stricter check of passengers' identity. According to the new rule, travelers outside the Schengen zone should be examined at both the entry and exit.

The Guardian: Air travellers in Europe delayed by security checks and strikes

Border control refers to the authority about the criminal history of each passenger. It takes at least a couple of minutes. Thus, several hours is added to the total waiting time. Workers at border control are insufficient at many airports.

Furthermore, there are several factors to hurt your feeling at the airport many of which occurred recently, according to the article below.

The Guardian: Destination misery: seven ways they turned airports into hell

Some of the factors suggested by the author, I do not care. I do not drink free water frequently. And I seldom bring large suitcases. The issue of VAT and the paradox of duty-free shop are certain. But you can choose instead of the shop at the airport.

In my opinion, whether you can pass the gate smoothly depends on the circumstance in each airport. Last year, I went to the UK for an academic visit. In that day, I was detained at the border in Heathrow Airport. The reason was never revealed, but I guess someone misidentified my travel history. The year before, a worker said I could not enter Greece with my passport. Obviously, it was not true. I had to explain my status to her, taking a quarter hour.

I believe strict border control is no longer effective for domestic security. Terrorists are born anywhere if there is a certain condition, unfortunately. Enrichment of the whole society is the only and ultimate solution.

Tuesday, August 8, 2017

Current issue around drug abuse in the UK

In the UK, illegal drug use has become a serious social problem. The amount of death related to drug abuse in England and Wales was 3,744, increased by 44% in these four years.

International Business Times: Cocaine deaths hit record high in UK

Among them, cocaine is focused because users are rapidly increasing. Opioids abusers also have become familiar. The cases by new psychoactive substances were slightly increased.

There are mainly two ways to solve this problem. The first is to extinguish the route of acquiring drugs. Strict investigation at the border and harsh punishment to dealers are included. Considering that the UK is surrounded by the sea, shattering the entrance will be effective as well as Japan.

The second is harm reduction. Most drug abusers are suffering from dependency. They feel difficult to withdraw from their current life with drugs. Offering proper treatment, instead of punishment, will protect them from a recurrence of drug misuse.

However, it is not easy to invest harm reduction. Some people do not accept the idea to help people violating the law with the official resource. In Japan, harm reduction has not been infiltrated into the society. I think the reason is that methamphetamine dealt by antisocial organizations was dominant in Japan. Most Japanese hesitate to support people once related to antisocial groups.

When I was in the UK, cannabis users were very common. And some practitioners seemed not to deem it as problematic. Indeed, cannabis does not so frequently cause harmful reactions to the users. Nonetheless, a few people bring fatal results with cannabis use. I do not agree with the opinion to legalize the individual use of cannabis, which is considered or has already been realized, in some countries.

Monday, August 7, 2017

Environmental cost for pets

In recent years, we frequently see people with dogs or cats in many developed countries. In a supermarket, a line of cupboards is occupied by pet foods. Pets are now indispensable companions for many people.

It means that pets should be involved in the environmental circle of our community. Thus, each of them is counted they as a member of the local population, despite the fact that they do not pay the tax.

There is large variation of pet foods. There are many veterinarians. Many professionals deal with the funeral of pets. Pet lovers often consider a set of insurance for pets.

And also, pet food is not free, different from in the past when we gave leftover to the pets. "Doggy bag" is now never used as it means.

The cost is not limited to the issue of money. Producing food consumes lots of resources. Needless to say, adequate food providing is a critical issue, especially in developing countries.

The Washington Post: The hidden environmental costs of dog and cat food

In addition, food processing does damage to the environment to some extent. A total of 64 millions tons of greenhouse gases is created annually for pet food production, according to researchers.

Pros One: Environmental impacts of food consumption by dogs and cats

I have never considered the impact of pet industry on the environment. We should be aware of the fact that our pretty companions bring us both happiness and burdens.

In some countries such as Germany, Swiss, and Australia, dog keepers have to pay the tax following the number of their pets. In Japan, there are very few regulations about pets. Before the WWII, however, pet tax had also been adopted in Japan. In the near future, an argument will be raised again.

Sunday, August 6, 2017

Alcohol consumption protect you from diabetes?

A recent study raised a question of safety of alcohol drinking again. The result suggests that a certain amount of consuming alcohol is related to the lowered risk of diabetes.

Independent: Drinking wine or beer up to four times a week can protect against diabetes, researchers say

This cohort study was conducted in Denmark with more than 70,000 participants for five years. The onset of diabetes was observed as an endpoint in approximately 1,700 people. The relative risk ratio was 0.70 (0.67-0.94 in 95% Confidence Interval) for men who consume beer 1-6 times in a week compared to teetotallers. In contrast, spirits drinking more than once a day raised the risk for 1.83 times (1,29-2.58) in women.

Deabetologia: Alcohol drinking patterns and risk of diabetes: a cohort study of 70,551 men and women from the general Danish population

This study is a large prospective cohort. And it was published in a leading academic journal. The author constructed a study design in which major confounding factors were adjusted in advance. Therefore, the suggested outcome is relatively reliable, I think.

However, the possibility of reverse causality cannot be denied. People prefer to drink wine or beer may be likely to be healthier to those who like spirits. I do not recommend you to take a binge drinking according to this study.

The pros and cons of alcohol consumption on your health have been debated repeatedly. Recent studies emphasize its disadvantage. At least, liver damage and dependence are serious risks regarding alcohol drinking. You should be aware of the latest discussion.

Saturday, August 5, 2017

South Korea prepare for nuclear war

Some South Korean's politicians and their supporters seem to consider to develop nuclear weapons, according to the latest poll.

Independent: South Korea 'considering developing nuclear programme' to counter threat from North

South Korea has been exposed of the threatening of North Korea. So far, the US took the initiative in its defense strategy. But Donald Trump, as he repeatedly said, has an idea that South Korea and Japan should protect themselves with their own equipment. He even recommended having nuclear weapons.

President Moon is against this idea. But the result of the newest poll suggests the majority of Korean citizens want to protect their land with nuclear weapons.

Nuclear weapons are cheaper than other types of armies. Its development is not so difficult, at least theoretically. Both South Korea and Japan can establish a strategic defense with nuclear weapons if they wish. The reason why North Korea is stitching to the development of nuclear bombs is that it is the cheapest way of grabbing power.

However, nuclear weapons inflict serious damage on not only humans but also land itself. The center of the explosion will be destroyed. And they remain fallout for many years. If winning the war in the Korean peninsula, it will be difficult to integrate the two nations. Instead, the land will become in chaos.

After all, the possibility that nuclear war is realized by each of the nations. Nuclear weapons will have the power of prevention from being attacked. It is the same situation of the cold war between the US and Russia.

Friday, August 4, 2017

The three things which are most desperate to you

The first is that the person who is most important for you never accepts you.

The second is that you destroy the person whom you love the most.

And the third is to think such silly things.

Thursday, August 3, 2017

Bitcoin Cash, a fruit of hard fork

On July 1st, 2017, Bitcoin encountered a hard fork, finally.

Bitcoin Cash emerged following supporters of an alternative solution for the issue of scalability.

Some trading post provided Bitcoin Cash to the users who were storing Bitcoin. Most posts offered the same amount of coins as they stock. Thus, the number of coins was approximately doubled.

Theoretically, the total value of Bitcoin and Bitcoin Cash should be the same of that of current Bitcoin. There is no additional value produced. However, while the price of Bitcoin Cash is fluctuating, the price of Bitcoin is not so decreasing. As a result, the total value of these coins is now 1.1 times of that in the past.

This issue is not so simple, of course. The price of Bitcoin was considerably damaged by the rumor of the hard fork. In this sense, Bitcoin Cash was cannibalizing Bitcoin for these some months.

Now, the price of Bitcoin Cash is over 600 USD. I think it is over evaluated. Bitcoin Cash is still an immature and vulnerable cryptocurrency. The bubble of Bitcoin Cash will burst soon, I prospect.

Wednesday, August 2, 2017

Own language accidentally developed by AI

The shocking news made the word "own language" a trend on Twitter in Japan.

Two AI programs invented by Facebook created their own language suddenly while an experiment was ongoing. The experiment was canceled by the programmer immediately.

Metro: Facebook robot is shut down after it ‘invented its own language’

According to the media, these two AI are communication bots. They were in training with talk to each other. They used English as a way of communication. However, they began to invent new words which had not been programmed for mutual communication.

I am not sure these bots equip deep learning technique. Use of some abbreviated terms is frequently seen in the communication among people in the close relationship. Thus, inventing some fragments of words is not surprising for an AI. The issue is what was the intention of the AIs, or should I say, "Did these bots think by themselves in introducing a new language?"

If so, it is a quite serious issue. Whether an AI can acquire a consciousness has been broadly discussed. We will able to ask the AI why did it invent an own language. If the answer is naturally reasonable, this AI may have a mind.

On the other hand, I hardly believe this AI can answer this question. AI with a will would not be developed at least for a decade.

Tuesday, August 1, 2017

Ketamine's power as antidepressant

There are many ways of treating depression. Psychotherapy, electroconvulsive therapy, as well as light therapy and other experimental solutions are attempted for drug-resistant depression. However, the importance of pharmacotherapy has still been dominant.

In recent years, some new drugs are under consideration as an option for treating depression. On the other hand, some conventional drugs are also re-evaluated as an antidepressant. Among them, ketamine has been expected for its rapid effect for elevating mood.

Ketamine was developed as an anesthetic drug originally. It was often observed that users of ketamine became looking happy. And in recent years, its effect for improving depressive symptoms is investigated in many clinical trials.

The results are very promising. Ketamine is effective in some patients who did not respond to other antidepressants. In addition, the improvement is observed rapidly. Thus, patients in an acute phase of depression with a risk of suicide can receive the benefit of ketamine.

However, ketamine's adverse effect has not been well examined. Especially, longitudinal effect such as raising blood pressure can be problematic since the patients will have to take medication for a long term for relapse prevention. Researchers published a systematic review regarding the safety of ketamine warned this issue.

International Business Times: Ketamine can help treat depression - but scientists are wary of long-term risks

While admitting the potential of ketamine therapy, I am afraid of its negative impact, as I mentioned below.

My past entry: Ketamine, an expecting antidepressant

Ketamine is also used as a recreational drug. It means that its character is similar to that of methylphenidate, perhaps. Methylphenidate had been used as an antidepressant in Japan. Since some abusive patients and doctors inappropriately taking this drug committed a crime, Japan government cancel the permission of methylphenidate for anti-depressive usage.

I reckon ketamine does not have a substantial effect on depression. If the taker's mood is elevated, he will need some other solution for a complete recovery from depression.

Monday, July 31, 2017

Sequels in July 2017

July 21, 2017
Renho under fire in the issue of dual citizenship

Soon after this event, Renho resigned the top of the Democratic Party of Japan. She could not extinguish the criticism against her. Also, she had to dismiss Yoshihiko Noda, an ex-Prime Minister, as the chief secretary responsible for the defeat in the latest election of Tokyo's metropolitan assembly.

As I mentioned, I am indifferent to Renho's origin. She was blamed too much for this issue, for my impression. On the other hand, I hardly support her policy. It is unsure who will succeed her.

July 19, 2017
Passengers, unreal event in real SciFi

I watched Passengers again via Amazon Video. I noticed several doubts in the storyline. I like this movie for its theme and the visual, but its integrity is poor, I think.

July 11, 2017
Bitcoin dream to the next stage

In this month, the issue of Hard Fork for Bitcoin was raised again and again. Now, the possibility of Hard Fork occurring on August 1st is low. The price of Bitcoin became relatively stable. But the argument will remain for a while.

Sunday, July 30, 2017

North Korea launched an ICBM

On July 28th, 2017, a missile launched from North Korea dropped in the waters of Japan(s exclusive economic zone.

North Korean official committed that it was an ICBM, meaning it could reach North America over the Pacific Ocean.

The US and South Korea immediately responded to the news. They said considering a military response. South Korea requested the US to equip additional anti-missile defense units.

Independent: US and South Korea discuss 'military options' in wake of latest North Korea ICBM test

It is unclear whether North Korea has completed the development of a nuclear weapon to be attached to the head of the missile. If so, it is evident that the US is endangered by the threat of North Korea.

Donald Trump says China should take an initiative to make North Korea disarmed so far. But the movement of China is sluggish because China has a close relationship with North Korea.

Anyway, this provocative act will make North Korea more solitary in the international relationship. North Korea may intend to become an equal position to the US. On the other hand, South Korean President, Moon Jae-in, who is relatively affirmative to North Korea, will have difficulty in developing a friendly relationship with North Korea.

Therefore, I hardly believe North Korea has a rational plan for the future. I am afraid Kim Jong-un is unaware of the current situation. The possibility of emerging a nuclear war has been increased.

Saturday, July 29, 2017

Good bye, Flash

Adobe Systems announced that it would terminate Flash in 2020.

Flash was a standard technology for playing a movie on the internet. But its share is declining because of the rise of alternatives such as HTML5.

CNN Tech: So long, Flash: Adobe will kill plug-in by 2020

Flash has been infamous while dominant on the internet. It is well known that Steve Jobs criticized Flash for its security risk and inferior usability. He never permitted Flash available on Safari, the standard web browser on Mac.

Adobe itself noticed the problems around flash. It frequently released a security patch. But its old architecture was still a burden for developers to make Flash functional.

It is welcomed for most programmers to be free from Flash. On the other hand, it is unsure what will be seated as the post Flash. Many legacy software will no more work without Flash. Alternation of generations is always challenging.

Friday, July 28, 2017

Preventing dementia

The aging society is one of the biggest problems in the modern world. We will have to maintain our body and mind by ourselves because caregivers of ours will also be old. Healthy life in elderly should be prioritized in most developed countries.

Among several issues in this area, keep your brain active is crucial. It is said that one-fourth of the people over 80 have dementia. Preventing dementia is a key of prolonged life expectancy and high quality of life.

However, how to keep your cognitive function intact is yet to be clarified in spite of several hypotheses. Recently, so-called "brain training" was proven not to be effective in the prevention of dementia.

The result of a recent study suggests that solving crossword puzzles is associated with better brain function. The researchers believe that such habits can keep your brain young.

Hindustan Times: Playing crossword puzzles keeps dementia away. Here’s how

In this article above, how this study was conducted is not described in detail. It is unclear even whether the study was published in an academic journal.

Therefore, I am skeptical about this outcome. It is possible that simply crossword lovers have a good cognitive function.

Rather, physical exercise may be a better habit than brain sports in keeping your mind young. There is richer evidence suggesting the association between exercise and cognitive function, while the causal relationship is hardly proven.

Perhaps, there are some confounders or mediators between them. Active people may have many friends, including pets. An emotional interaction with your mates can be a positive stimulus to the brain.

Independent: Owning a dog could be key to keeping older people healthy and active, study finds

On the other hand, oxidative stress is potentially harmful to your body. Excessive physical movement with deep breathing can damage you, theoretically. Complicated!

Thursday, July 27, 2017

Ravens as wise as a child of four years old

Human is the top of all creature. And what makes us supreme is intelligence. Most of other animals are driven by their instinct. Finding a new way to a solution is our unique ability.

However, some animals have also splendid intelligence, according to recent studies. Among them, ravens are considered to match infants in their thought, surprisingly.

The researchers examined the problem-solving skills of ravens with some tasks. Many examinees passed the challenge in using tools and abandoning the immediate reward for better one in the future.

Independent: Ravens can be better at planning ahead than four-year-old children, study finds

Ravens had been known for excellent skills for hoarding foods. But they were considered as genetically programmed skills. This study suggested that they were good at constructing a broad strategy regardless of the stimuli in front of them.

I was surprised to know that ravens are superior to other animals. In general, birds have limited intelligence because they have sacrificed the volume of the brain for better flying ability. Even if not always available, the volume of the brain is consistent with the level of intelligence. The more the brain is heavy, the more it has synapses. It is hypothesized that human rose because their brain became too heavy to be supported with crawling posture. It is interesting that ravens have the same level of intelligence as chimpanzees.

Wednesday, July 26, 2017

Driving deprives your intelligence?

A surprising result of a study regarding driving and intelligence was announced recently in the UK.

Kishan Bakrania, a medical epidemiologist at the University of Leicester, explained the date he obtained suggesting that people with driving habit more than two hours in a day are likely to drop their cognitive function. According to the media, this survey investigated 93,000 people aged from 37 to 73 for five years. Participants who regularly drive a car for two or three hours in a day had lower IQ than those without or with little hours of driving. Also, they declined the IQ score more rapidly.

Independent: Driving for more than two hours a day makes you less intelligent, study finds

The researchers claimed that driving is an inactive behavior for your brain for an explanation of this result. Furthermore, they said to have found that use of a computer and gaming have a protective effect on your intelligence.

Unfortunately, I could not find the protocol of this cohort study on the online registry of clinical trials in the UK. Therefore, I cannot judge the validity of this study itself.

In my impression, this result is quite doubtful. At least, I will never trust this outcome unless this study is published in an academic journal with a good peer-review system. The causal relationship is not so easy to be proven in a mega-cohort.

An alternative explanation for this result is reverse causality. People with lower intelligence, perhaps with a tendency to decline, are likely to get a job for low income, typically driving jobs. Thus, their decline is not because they drive a car frequently. The researcher should comment this possibility.

In addition, examination of cognitive function is not so simple. This study is a cohort with large sample size. It is likely that a few simple tasks were adopted to measure their intelligence. Some cognitive tasks require examinee's dexterity. Others demand knowledge. It is difficult to evaluate a person's intelligence exactly with limited time.

I am worrying that several media reported this result sensationally. If the quality of this study does not match today's standard, vehicle drivers will get angry.

Tuesday, July 25, 2017

T Rex may be slower than you

Do you like dinosaurs? They attract many people, especially boys, for their huge figure.

However, since dinosaurs had perished before humankind appeared, the real ecology of dinosaurs is still under argument. Why they were eradicated is yet to be completely clarified. Today's figure of dinosaurs in the media and films, including Jurassic Park, is considerably fictitious constructed by the imagination of the creators.

Surprisingly, latest studies suggest Tyrannosaurus could even not run. Their maximum speed is suspected as only 20km/h.

Independent: Tyrannosaurus rex would not have been able to outrun a speedy human, research suggests

We easily imagine that a gigantic dinosaur runs with high speed using their long legs up and down. But this way of running does serious damage to its legs. The magnitude of pressure on the leg depends on the height of them. Dinosaurs' big body itself is a burden to their life. Therefore, most gigantic animals, such as whales and elephant seals, live in the sea.

Having a big body is a unique characteristic. But the environment of the earth is not always friendly to giants.

Monday, July 24, 2017

Google's homepage will be no more simple

Google is going to amend the homepage design completely.

Google's homepage is famous for its simplified design. All contents are the logo of Google which is occasionally altered and the search box. Google's decision is for the first time since it was developed in 1996.

The Guardian: Google to radically change homepage for first time since 1996

Nowadays, many people can make an internet search without Google page. Google Chrome and other internet browsers equip a search window shared with the address bar. Indeed, I dare not to go to

Google is planning to show a compilation of personalized information on its homepage. Thus, it will be different from Yahoo and other popular portal website. Personalization according to search history is one of the greatest advantages for Google. It is rational for Google not to make its homepage common among persons.

On the other hand, increasing number of people is going to quit the use of a PC. In each Android Phone, Google has already provided personalized portal page as Google Now. Considering it, the amendment of Google's homepage will have little impact on your lifestyle, perhaps.

Sunday, July 23, 2017

Is the second referendum for Brexit real?

The decision of Brexit was one of the topics in the last year. The majority of the UK citizens supported the idea to withdraw from EU. The referendum made David Cameron, the concurrent Prime Minister, resign. And his successor, Theresa May, is preparing for the Brexit.

However, according to the figure after Brexit gradually clarified, not a few people began to regret the vote. There are a considerable amount of the UK citizens, including the voter for Brexit, who want to reset the decision of Brexit.

And latest poll shows that 41% of respondents wanted another vote on Brexit, according to the media.

International Business Times: Support grows for a second Brexit referendum in the UK as EU talks begin

In real, there is little possibility for the government to take another referendum for Brexit. It would damage the historic decision on Brexit. Even the majority of the citizens do not want Brexit, amending the policy determined by a democratic way should be avoided.

After all, opposing opinions to Brexit are a setback for May's administration. If citizens' opinion is split, she cannot take the initiative in the negotiation with the EU. May's conservative party was defeated in the latest general election. The administration is in peril now.

Saturday, July 22, 2017

CEO of security company hacked to bankrupcy

Online hacking is a rapidly growing type of crimes. And if happened it will do severe damage to you.

Nowadays, no one is secure from cyber crimes regardless of your position, lifestyle, or abilities. There is a person who had been a CEO of a security company forced to bankrupt because of a hacking.

Alf Göransson, chief of Swedish company Securitas, declared bankrupt. Subsequently, he was dismissed as the chairman. But, these events were results entirely from the online hacking of his identity. The culprit deliberately submitted the document to apply for the bankruptcy to the Stockholm District Court.

International Business Times: Security exec 'declared bankrupt' after his own identity stolen by hackers

The figure or purpose of the offender remains uncertain. It is was sorry for Göransson not to have notified for weeks since the hacking started.

Sweden is one of the leading nations which proceed digitization of the official application. While there are several benefits on IT utilization, the magnitude of the risk of cyber crimes is increased following digitization. In Japan, some people are opposed to the introduction of digitized management for this reason.

I think the global trend of digitization is unstoppable. Preventing unsafe use of digital tools is a serious issue. Education for users, fail-safe system, and eclecticism of analog and digital management are expected for a solution.

Friday, July 21, 2017

Renho under fire in the issue of dual citizenship

Renho, the leader of opposing Democratic Party of Japan (DPJ), disclosed her descent.

She has been suspected of having dual-citizenship. Renho was born in Taiwan, but she claimed that she had been nationalized. However, her explanation seemed not true. Recently, she disclosed some documents to prove her citizenship as a Taiwanese had expired.

However, her act ignited broader criticism. Some people do not trust her explanation. And others criticize her behavior will deteriorate the discrimination against foreign people living in Japan through exampling that they must disclose their census registration. On the other hand, some people believe VIPs such as lawmakers should disclose their origin as a duty.

Japan NEWS by the Yomiuri Shimbun): Renho dragged her feet in responding to the ‘dual nationality’ scandal

To be honest, I am completely indifferent to her nationality. If she had violated some Japanese laws, she should be punished according to each legislation. That is all.

At least in my sense, it is not problematic that a foreigner becomes a politician. In the general election, the winner is right. It is the rule of democracy.

Also, even if her nationality belongs to Taiwan, I accept her as far as she is working for Japan. In many private companies, foreign persons seat an important position including the president. The top should be elected according to her or his talent, not nationality. Besides, foolish Japanese should never be the top of Japan.

Of course, absolute loyalty to Japan is required to lawmakers. If the leader of Japan is a spy of a foreign nation, the situation will be critical. But, the degree of the loyalty to Japan does not depend on her or his nationality. Indeed, some Japanese politicians do not respect the Emperor. The definition of loyalty is another issue, however.

The core members of DPJ seems to consider that the issue of dual citizenship of Renho was attributable to the defeat in the latest election of Tokyo Metropolitan embassy. It is a ridiculous idea, I think. Actually, since I do not agree with Renho's policy, I do not support Renho. That is all.


Thursday, July 20, 2017

Vaginal plastic surgery in adolescents

In the UK, it is said that increasing girls want to take a plastic surgery on their external sex organ.

International Business Times: Porn and social media blamed as pre-teen girls seek 'vagina surgery' in UK

This article above suggests that this tendency is attributable to spreading information through porn and social media on the internet.

I am not sure if it is real or exaggerated. The internet is often blamed for amending traditional ideologies. I do not agree with this kind of opinion. There is no bad information, but bad people to utilize it.

However, there are specific points of discussion regarding sexual issues. We seldom have an opportunity to know others' private zone before the internet era. It had prevented us from feeling inferior to others ones. But recently, there are lots of people exposing their body. Patients with eating disorder increase where there are many slim models. In some countries, too slim models are banned following new legislation.

The adolescent is an unstable period of the life. We compare with each other. As well as desiring to be unique, we fear to be different from others.

Some physicians offering a plastic surgery maltreat clients with imprinting their figure is inferior to others. I believe such kind of tempting advertisement to adolescents should be legally prohibited to some extent.

Wednesday, July 19, 2017

Passengers, unreal event in real SciFi

I watched Passengers, a SciFi movie, in the airplane recently. It was fortunate for me to find it because I missed it on cinema.

IMDb: Passengers (2016)

In this story, the hero accidentally woke up in the starship where 5,000 passengers were in the hibernation. This starship was planned to reach a colony planet 90 years after. The hero could not fall into cold sleep again. It meant that he would be dead in the starship completely alone.

This kind of theme is relatively popular in the SciFi story. Space is substantially accompanied with solitude.

But, he made an unethical decision after a year of stay. He deliberately broke a hibernation capsule in which a woman whom he was fascinated was sleeping, to wake her up. He mimicked as if her awakening was accidental. She was astonished to know the desperate situation, but later she loved him.

One year after, the hero made a proposal to her. At the same time, she noticed that he woke her up. She refused his apology. However, soon after that, the starship encountered a critical failure. The two persons had to fix the trouble, not for themselves, but for all 5,000 passengers.

The graphic of this movie is extremely beautiful. I watched it only on the screen equipped on the airplane. I would like to see it in cinema.

In contrast, there are several errors in the plot. First of all, this starship has almost no fail-safe technologies. The accident occurred due to a crash with asteroids. Is it a common type of accident, isn't it? I hardly understand why this starship was easily crippled by this natural trouble.

As well, it is strange that the hero could not fall into hibernation again. If his machine is troubled, there must be several backups. In this movie, only one hibernation machine was spared in the starship. It is unrealistic.

Furthermore, no clues were awake in the starship for a couple of years. And AI supporters did not equip the program to fix the trouble at all. The designer of this starship seemed to completely trust the safety system of this ship. It is ridiculous.

These points lowered the quality of this movie.

On the other hand, the hero's behavior to wake her up is often discussed. I do not admire his act. And it is also strange that he hid the goods which he used to break the hibernation bot. It was a risky act. I could not understand how he would explain it if she saw the goods.

In addition to the beautiful description, the main actors' play was splendid. The music was also good.

Personal Rating: 3 (fair)


Tuesday, July 18, 2017

Mental health day is effective for keeping work?

Mental health in work place is one of the topics today. Also at the conference I attended recently at Prague, several speakers referred to this issue.

In this article below, it is recommended to take a "mental-health day." The author considers it problematic that employees hesitate to talk about their mental health issues at most workplaces.

I agree with this point of view. Despite its magnitude, mental health is hardly concerned by both employees and employers.

International Business Times: Can you take a mental health day at work?

However, the issue is not so simple. First, the benefit of one day for maintaining your mental health is limited. If you feel depressed or too anxious because of excessive work stress, resting for at least a couple of weeks is required to recover. Instead, one day is enough to prevent a breakdown when you keep your body and mind functional. However, in this case, you need not tell your boss about it in advance. Apply for a paid holiday, simply.

Second, mental health problem will be a reason for dismissing. It is not only an issue of discrimination for disabled people. Every employer wants to hire employees with high performance for low cost. Mental health problems hinder the performance, even if it is not deemed as a medical disease. Pleasant, tender, and energetic persons are likely to get a job. In contrast, persons who dislike people and cannot deal with others have difficult to be hired. Talking about your mental health at a workplace always has a risk for notifying your employer about your disadvantageous elements. This imbalance cannot be solved by legislation for banning discrimination.

In my experience, patients who have some people knowing his or her mental disorders are likely to maintain their job than those who have to conceal their medical status. But it seems not because the boss takes care of the employee. Rather, employees who feel safe to open their medical status tend to talk about it.

Treatment of mental health issues at workplace level should be much more focused. But there is even a need for developing a standard care.

Monday, July 17, 2017

Extremity created with 3D printing

The NHS has started a clinical trial of the usage of bionic hands produced with a 3D printer.

Independent: NHS launches world's first trial of 3D printed bionic hands for children

The bionic hand will be available for children who took an amputation. Currently, creating an artificial hand costs 60,000 GBP. But the new technique will make a lighter hand for only 5,000.

Interestingly, some companies such as Disney are collaborative with this project. Child patients will choose an artificial hand featuring Iron Man.

So far, it is said that a 3D printing technology will be adaptable to medical use. Human parts are various among persons. 3D printing can copy your body parts with ease. But there are several challenges before its realization.

If this clinical trial is successful, we will check the longitudinal safety. Since limbs can be removable, they are easier to control compared to inner organs such as bone.

I hope the patients will benefit from this innovation.

Sunday, July 16, 2017

Journey to Prague (2)

Czech Republic, or Czechia, is an EU member, but its official currency is not Euro. Although it is said many shops accept Euro, I seldom saw Euro price.

Price of goods at Prague is generally low. Big Mac is sold for 79 Koruna česká, almost the same as that in Japan.

This is the cake I ate at Cafe No.3. It cost only 130 Koruna česká including tip.

Interestingly, the price of coke in a PET bottle is quite various according to the place. I found it sold only for 20 Koruna česká at a vending machine. In contrast, it is sold for 55 Koruna česká at a Costa Coffee shop. A can of Pringles costs surprisingly 150 Koruna česká, tripled by its price in Japan.

The usage of credit card is well spread at Prague, in general. However, I had some troubles about it. Soon after arrival to the airport, I tried to buy the ticket of public transportation. But the ticket vending machine accepted only small coins. Credit cards were available, according to the guidance. But it did not work, perhaps my credit card did not equip a specific chip. Therefore, I had to exchange a bill into small coins.

In addition, a vending machine in the airport was not working. I saw a traveler claiming that the coins were not returned.

In Prague, Japanese cuisine is also common. In the hotel I stayed, I can eat roll sushi at the breakfast. Of course, it tasted not so good. You should not expect to eat delicious sushi except in a foreign country except at a few luxury restaurant.

Unfortunately, I seldom saw anything in Prague because I spent the most time at the conference hall. Maybe the next time I will enjoy sightseeing at Prague.

Saturday, July 15, 2017

Journey to Prague (1)

As I wrote yesterday, I had an international trip. The destination was Prague.

I attended an international conference on forensic mental health. My presentation was planned on the first day. Therefore, I attended almost all the schedule.

I had to visit Paris to reach Prague. I used AirFrance, a leading airline company in France. Croissant served in the airplane was very delicious. Also, a lavatory at the Charles-de-Gaulle airport was very cool.

Prague is located in Eastern Europe. The appearance of this town was similar to other European cities. It is said that Prague has several traditional buildings because they were not destroyed in the WWII. But, I did not look around the town other than visiting the conference place. So, I am not sure how they are beautiful.

There are lots of people smoking at Prague. Unfortunately, waste of cigar is frequently seen on the road.

Friday, July 14, 2017

Mac battery charge troubled

Yesterday, my Mac encountered a serious trouble. It could not be charged.

The Macbook uses a cable with USB Type-C connector. And I use a cable with the newest standard. It was unlikely that this cable was in failure.

But, it was far more unlikely that the Mac itself was troubled. Therefore, I bought a new cable for testing. To be honest, I was in abroad. Thus, I had no surplus cables.

However, this attempt failed. My Macbook's battery ran out.

I felt desperate. If this Mac cannot be charged, I will not be able to do most of my works until repaired. Since I was in abroad, it was difficult to consult a genius at a Mac Store.

On the other hand, there are some causes of troubled charge. I decided to try any potential solutions.

1. A reboot can be a solution.

I had already tried it. The next day, the situation was not changed.

2. Mac battery can be crippled in cold environment.

I stayed at a hotel. It was slightly cold. But it seemed not be a cause of the trouble.

3. SMC reset

Mac with Intel CPU adopts a system controller. It can interfere the charge. You can reset the setting by pushing Control+Shift+Option keys with pushing the power button for several seconds.

As a result, this operation worked completely. After this, my Mac began to charge the battery.

I felt really relieved. Now I can write this entry with my Macbook.

Thursday, July 13, 2017

Benefits of cycling as old technology

Do you like cycling? I do not.

Nowadays, cycling has several meanings; a way of exercise, commuting method, and a hobby. Its history is perhaps originated from the early 19th century. After the invention of the car, the bicycle has been considered as a cheap and powerless alternative of the car. But recently, its merits are reassessed.

In my opinion, there are two advantages of cycling. First, it is costless both for the rider and the earth. You need no parole to ride the bike. And it creates no emission, which is deemed quite harmful globally. And second, cycling can promote your health. It is not limited to maintaining your physical activity. Some studies suggest the effect of regular cycling on your mental health.

The Conversation: Ten reasons why we should all love cyclists

It is common that old technology is admired again in the latest era. Some people love home-made cookies even if they can get machine-made ones with low cost. In Japanese, there are a few traditional hunters who keep a hawk as a partner, so-called "Taka-sho [hawk master]." Some Japanese luxury restaurants use wild birds caught by a hawk for serving to guests. It is because a lead bullet damages the taste of the meat.

Unfortunately, the environment around me is not good for cycling. Therefore, I seldom use a bicycle.

Wednesday, July 12, 2017

The risk of cardiac disease: recent research

Cardiac dysfunction is one of the principal causes of death as well as malignant neoplasms. Reducing the risk of heart attack is crucial for preventing premature death.

So far, regular habits of exercise and a balanced diet are recommended to maintain your health. Avoiding smoking is also essential. In addition, busy and aggressive lifestyle is said to be associated with heart attack.

Furthermore, recent studies suggest other several factors influencing your heart function. Some of them are still under discussion. They include noise, oversleeping, and even your blood type.

Hindustan Times: Keep your heart healthy: These 10 new study results will surprise you

In the items referred in this article above, mental stress, olive oil, and genetic factors are widely admitted to modifying the risk of heart failure. As well, it is highly certain that the heart muscle tissue cannot regenerate itself. Some researchers are challenging the barrier, attempting to utilize iPS cells.

On the other hand, it is doubtful that a particular blood type can influence the risk of heart attack. There are only four categories in ABO blood type. If a study suggests a type is superior to others, it is difficult to distinguish the result from a random effect. According to the article below, the result showed that people with O blood group have 1.4 percent risk while people with non-O blood group have 1.5 of coronary diseases. This difference seems to be statistically significant because the sample size was as large as 7,71,113. However, I do not believe that this difference has a particular clinical meaning.

Hindustan Times: Can your blood group affect the risk of a heart attack? A study says it can

In Japan, some people are very fond of talking about blood type. There are many jinxes regarding blood type in Japan, such as people with A are serious. These ideas are no other than prejudice, I think. It is problematic if a person seriously trusts them.