임정민

Titanium frame head tube

Crack 1

Crack 2

Crack 3

Proto type :

Exerting forces

Result : 

Notice : 

This is not yet tested.

I used plastic bridges to avoid rubbing each other.

Spoke tension meter calibration tool DIY

이 글의 목적은 자전거를 탈 때 안전의 본질적 요소와 헬멧의 한계에 대해 말씀드리는 것입니다.

라이딩시 헬멧을 꼭 쓰시기 바랍니다.

그런데 헬멧의 유효한 사용범위에 대해 잘못 평가 하시는 분들이 많습니다.

라이딩에서 사실상 최우선 조건은 안전일것입니다. 

만약 여기에 동의하지 않으신다면 어차피 헬멧은 그리 중요한 문제는 아닐 것입니다.

라이딩에서 안전이 가장 중요하다면

안전을 위해 가장 중요한 것은 사고를 당하지 않는 것입니다.  

그런데 헬멧에는 사고를 예방해 주는 기능은 없습니다.

자전거 주행시 가장 안전한 방법은 다음과 같습니다.

이런 방법에는 별다른 장비나 스킬이 필요하지 않습니다.

(1) 많은 경우에 속도를 낮추는 것은 안전 확보의 가장 효과적인 방법입니다.

    물론 경우에 따라서는 속도를 높여야 할 때도 있습니다.

(2) 위험한 곳은 가지 않는 것이 최선입니다.

(3) 위험이 예상되면 자전거를 안타는 것이 최선입니다.

이 세가지만 지켜도 웬만한 사고는 피할 수 있습니다.

역으로 사고가 났다면 대부분 위 세가지 중 하나에 해당할 것입니다.

특히 자전거 주행중 사고가 났다면 (3)번은 무조건 해당하는 것입니다.

헬멧은 중요합니다.

그러나 (만약) 머리에 충격이 없다면 (공기저항 등의 문제가 아닌 이상) 헬멧은 불필요합니다.

제가 헬멧의 한계에 대해 도싸에 글을 올렸다가 수많은 분들의 비이성적인 비난을 들었습니다.

저는 그 중 한분을 고소했는데, 그분은 벌금형을 받으셨습니다.

원래 세상은 비이성적이고 저도 마찬가지라서 딱히 놀랄 일은 아닙니다.

스텐레스 시계줄 샌딩으로 무광 효과.

before vs after

Titanium watch and titanium-like stainless steel band.

작업 의뢰 -> 작업장 (클릭)

Material :

Magazine paper of navitimer advertisement, and CD case.

Just tape and put them together.

You can see this is surprisingly accurate, considering it took just 20 minutes. (See below)

혼다 대리점에서 전조등을 교체하려면 부품값만 20만원이라고 한다.

사용되는 전구는 오스람 D2S 인데 인터넷 가격이 4만원정도이다.

전조등을 패키지까지 통채로 갈아서 그런지 어쩐지는 모르겠지만

여전히 대리점은 '안전성' 또는 '보증' 이라는 핑계로 너무 비싸게 받는것 같다.

HID 전조등 교체는 처음 해본거라 몇가지 애로사항이 있었는데

우선은 황당하게도 설명서가 완전히 틀리게 되어있었다는 것과

전조등 유닛 내부가 눈에 보이지 않는 부분이라 손으로 만지면서 장님처럼 작업을 해야했다는 점이다.

설명서가 틀린 이유는 한국에 판매된 CR-V의 전조등이 다르게 설계되었기 때문이라 한다.

이러한 이유로 어쨌든 경험이 없는 사람이 직접 전구를 교체하는 것은 상당히 까다로울 수도 있었다.

그러나 무슨일이든 그렇듯이 알고보면 간단한 과정이다.

약간의 머리를 써서 핸드폰 카메라를 들이밀어서 사진을 찍어 내부구조를 확인해보았다.

우선 전조등 유닛 커버를 분리해야 하는데

커버를 반시계 방향으로 돌리면 바로 분리되기 때문에 어렵지 않았다.

다음으로 발라스터(겉보기에 밤톨만한 금속 박스 덩어리)를 분리해야 하는데

설명서에는 그대로 앞으로 잡아당기라고 써있기 때문에

그대로 시도해보았지만 전혀 될것 같은 느낌이 들지 않았다.

알고보니 발라스터는 커버와 마찬가지로 가볍게 반시계방향으로 회전시키면 쉽게 빠지는 것이었다.

설명서대로 했다가는 고장내기 딱 알맞게 되어있다.

아래 사진 아래쪽에 보이는 금속 덩어리가 발라스터이고 발라스터를 분리한 모습이다.

이 부분은 속으로 들어가 있어서 눈으로 보이지 않는다.

가운데 동그란 것이 전구인데 이 전구는 클립에 의해 고정되어 있다.

그 다음으로 클립 고정장치를 해제해야 하는데

이게 눈에 보이는 부분이 아니라서 방향을 모르면 분리하기가 어렵다.

가뜩이나 설명서도 잘못되어있기 때문에..

저 사진의 좌우에 있는 클립에 힘을 가해 누르면서 양쪽으로 벌리면 클립이 풀리게 된다.

이제 전구를 그대로 빼내면 위 사진과 같고

전구를 교체하여 역순으로 조립하면 된다.

여기서 아직 해결되지 않은것이

전구의 요철부분 방향이 있는데 이게 사진에서 보다시피

방향이 특정되어지지 않는것 같다.

그냥 첫번째 사진처럼 적당히 요철부분을 상하방향으로 두고

발라스터의 홈을 잘 보면서 거기에 맞추어서 끼우고 회전시키면 되는데

회전시킬때 발라스터와 전구가 둘다 애매하게 마찰되면서 돌아가서

약간 이상한 느낌이 들었으나

결과적으로 조립은 잘 되었고 아무 이상 징후도 없었다.

어쨌든 이렇게 하여 20만원을 세이브하였다.

트럼프 국회 연설문.hwp

Assembly Speaker Chung, distinguished members of this Assembly, ladies and gentlemen: Thank you for the extraordinary privilege to speak in this great chamber and to address your people on behalf of the people of the United States of America.

In our short time in your country, Melania and I have been awed by its ancient and modern wonders, and we are deeply moved by the warmth of your welcome.

Last night, President and Mrs. Moon showed us incredible hospitality in a beautiful reception at the Blue House. We had productive discussions on increasing military cooperation and improving the trade relationship between our nations on the principle of fairness and reciprocity.  

Through this entire visit, it has been both our pleasure and our honor to create and celebrate a long friendship between the United States and the Republic of Korea.

This alliance between our nations was forged in the crucible of war, and strengthened by the trials of history. From the Inchon landings to Pork Chop Hill, American and South Korean soldiers have fought together, sacrificed together, and triumphed together.

Almost 67 years ago, in the spring of 1951, they recaptured what remained of this city where we are gathered so proudly today. It was the second time in a year that our combined forces took on steep casualties to retake this capital from the communists.

Over the next weeks and months, the men soldiered through steep mountains and bloody, bloody battles. Driven back at times, they willed their way north to form the line that today divides the oppressed and the free. And there, American and South Korean troops have remained together holding that line for nearly seven decades. (Applause.)

By the time the armistice was signed in 1953, more than 36,000 Americans had died in the Korean War, with more than 100,000 others very badly wounded. They are heroes, and we honor them. We also honor and remember the terrible price the people of your country paid for their freedom. You lost hundreds of thousands of brave soldiers and countless innocent civilians in that gruesome war.  

Much of this great city of Seoul was reduced to rubble. Large portions of the country were scarred -- severely, severely hurt -- by this horrible war. The economy of this nation was demolished.  

But as the entire world knows, over the next two generations something miraculous happened on the southern half of this peninsula.  

Family by family, city by city, the people of South Korea built this country into what is today one of the great nations of the world.  

And I congratulate you. (Applause.) In less than one lifetime, South Korea climbed from total devastation to among the wealthiest nations on Earth.  

Today, your economy is more than 350 times larger than what it was in 1960. Trade has increased 1,900 times. Life expectancy has risen from just 53 years to more than 82 years today.

Like Korea, and since my election exactly one year ago today, I celebrate with you. (Applause.) The United States is going through something of a miracle itself. Our stock market is at an all-time high. Unemployment is at a 17-year low. We are defeating ISIS.

We are strengthening our judiciary, including a brilliant Supreme Court justice, and on, and on, and on.  

Currently stationed in the vicinity of this peninsula are the three largest aircraft carriers in the world loaded to the maximum with magnificent F-35 and F-18 fighter jets. In addition, we have nuclear submarines appropriately positioned. The United States, under my administration, is completely rebuilding its military and is spending hundreds of billions of dollars to the newest and finest military equipment anywhere in the world being built, right now. I want peace through strength. (Applause.)  

We are helping the Republic of Korea far beyond what any other country has ever done. And, in the end, we will work things out far better than anybody understands or can even appreciate. I know that the Republic of Korea, which has become a tremendously successful nation, will be a faithful ally of the United States very long into the future. (Applause.)

What you have built is truly an inspiration. Your economic transformation was linked to a political one. The proud, sovereign, and independent people of your nation demanded the right to govern themselves. You secured free parliamentary elections in 1988, the same year you hosted your first Olympics.  

Soon after, you elected your first civilian president in more than three decades. And when the Republic you won faced financial crisis, you lined up by the millions to give your most prized possessions -- your wedding rings, heirlooms, and gold “luck keys” -- to restore the promise of a better future for your children. (Applause.)  

Your wealth is measured in more than money -- it is measured in achievements of the mind and achievements of spirit. Over the last several decades, your scientists of engineers -- have engineered so many magnificent things. You‘ve pushed the boundaries of technology, pioneered miraculous medical treatments, and emerged as leaders in unlocking the mysteries of our universe.  

Korean authors penned roughly 40,000 books this year. Korean musicians fill concert halls all around the world. Young Korean students graduate from college at the highest rates of any country. And Korean golfers are some of the best on Earth. (Applause.)

In fact -- and you know what I’m going to say -- the Women‘s U.S. Open was held this year at Trump National Golf Club in Bedminster, New Jersey, and it just happened to be won by a great Korean golfer, Sung-hyun Park. An eighth of the top 10 players were from Korea. And the top four golfers -- one, two, three, four -- the top four were from Korea. Congratulations. (Applause.)  
Congratulations. And that’s something. That is really something.

Here in Seoul, architectural wonders like the Sixty-Three Building and the Lotte World Tower -- very beautiful -- grace the sky and house the workers of many growing industries.

Your citizens now help to feed the hungry, fight terrorism, and solve problems all over the world. And in a few months, you will host the world and you will do a magnificent job at the 23rd Olympic Winter Games. Good luck. (Applause.)  

The Korean miracle extends exactly as far as the armies of free nations advanced in 1953 -- 24 miles to the north. There, it stops; it all comes to an end. Dead stop. The flourishing ends, and the prison state of North Korea sadly begins.  

Workers in North Korea labor grueling hours in unbearable conditions for almost no pay. Recently, the entire working population was ordered to work for 70 days straight, or else pay for a day of rest.  

Families live in homes without plumbing, and fewer than half have electricity. Parents bribe teachers in hopes of saving their sons and daughters from forced labor. More than a million North Koreans died of famine in the 1990s, and more continue to die of hunger today.

Among children under the age of five, nearly 30 percent of afflicted -- and are afflicted by stunted growth due to malnutrition. And yet, in 2012 and 2013, the regime spent an estimated $200 million -- or almost half the money that it allocated to improve living standards for its people -- to instead build even more monuments, towers, and statues to glorify its dictators.

What remains of the meager harvest of the North Korean economy is distributed according to perceived loyalty to a twisted regime.  

Far from valuing its people as equal citizens, this cruel dictatorship measures them, scores them, and ranks them based on the most arbitrary indications of their allegiance to the state. Those who score the highest in loyalty may live in the capital city. Those who score the lowest starve. A small infraction by one citizen, such as accidently staining a picture of the tyrant printed in a discarded newspaper, can wreck the social credit rank of his entire family for many decades.  

An estimated 100,000 North Koreans suffer in gulags, toiling in forced labor, and enduring torture, starvation, rape, and murder on a constant basis.  

In one known instance, a 9-year-old boy was imprisoned for 10 years because his grandfather was accused of treason. In another, a student was beaten in school for forgetting a single detail about the life of Kim Jong-un.  

Soldiers have kidnapped foreigners and forced them to work as language tutors for North Korean spies.  

In the part of Korea that was a stronghold for Christianity before the war, Christians and other people of faith who are found praying or holding a religious book of any kind are now detained, tortured, and in many cases, even executed.  

North Korean women are forced to abort babies that are considered ethnically inferior. And if these babies are born, the newborns are murdered.  

One woman’s baby born to a Chinese father was taken away in a bucket. The guards said it did not “deserve to live because it was impure.”  

So why would China feel an obligation to help North Korea?

The horror of life in North Korea is so complete that citizens pay bribes to government officials to have themselves exported aboard as slaves. They would rather be slaves than live in North Korea.  

To attempt to flee is a crime punishable by death. One person who escaped remarked, “When I think about it now, I was not a human being. I was more like an animal. Only after leaving North Korea did I realize what life was supposed to be.”  

And so, on this peninsula, we have watched the results of a tragic experiment in a laboratory of history. It is a tale of one people, but two Koreas. One Korea in which the people took control of their lives and their country, and chose a future of freedom and justice, of civilization, and incredible achievement. And another Korea in which leaders imprison their people under the banner of tyranny, fascism, and oppression. The result of this experiment are in, and they are totally conclusive.  

When the Korean War began in 1950, the two Koreas were approximately equal in GDP per capita. But by the 1990s, South Korea’s wealth had surpassed North Korea‘s by more than 10 times. And today, the South’s economy is over 40 times larger. You started the same a short while ago, and now you’re 40 times larger. You‘re doing something right.

Considering the misery wrought by the North Korean dictatorship, it is no surprise that it has been forced to take increasingly desperate measures to prevent its people from understanding this brutal contrast.  

Because the regime fears the truth above all else, it forbids virtually all contact with the outside world. Not just my speech today, but even the most commonplace facts of South Korean life are forbidden knowledge to the North Korean people. Western and South Korean music is banned. Possession of foreign media is a crime punishable by death. Citizens spy on fellow citizens, their homes are subject to search at any time, and their every action is subject to surveillance. In place of a vibrant society, the people of North Korea are bombarded by state propaganda practically every waking hour of the day.  

North Korea is a country ruled as a cult. At the center of this military cult is a deranged belief in the leader’s destiny to rule as parent protector over a conquered Korean Peninsula and an enslaved Korean people.  

The more successful South Korea becomes, the more decisively you discredit the dark fantasy at the heart of the Kim regime.  

In this way, the very existence of a thriving South Korean republic threatens the very survival of the North Korean dictatorship.  

This city and this assembly are living proof that a free and independent Korea not only can, but does stand strong, sovereign, and proud among the nations of the world. (Applause.)

Here, the strength of the nation does not come from the false glory of a tyrant. It comes from the true and powerful glory of a strong and great people -- the people of the Republic of Korea -- a Korean people who are free to live, to flourish, to worship, to love, to build, and to grow their own destiny.  

In this Republic, the people have done what no dictator ever could -- you took, with the help of the United States, responsibility for yourselves and ownership of your future. You had a dream -- a Korean dream -- and you built that dream into a great reality.

In so doing, you performed the miracle on the Hahn that we see all around us, from the stunning skyline of Seoul to the plains and peaks of this beautiful landscape. You have done it freely, you have done it happily, and you have done it in your own very beautiful way.

This reality -- this wonderful place -- your success is the greatest cause of anxiety, alarm, and even panic to the North Korean regime. That is why the Kim regime seeks conflict abroad -- to distract from total failure that they suffer at home.  

Since the so-called armistice, there have been hundreds of North Korean attacks on Americans and South Koreans. These attacks have included the capture and torture of the brave American soldiers of the USS Pueblo, repeated assaults on American helicopters, and the 1969 drowning [downing] of a U.S. surveillance plane that killed 31 American servicemen. The regime has made numerous lethal incursions in South Korea, attempted to assassinate senior leaders, attacked South Korean ships, and tortured Otto Warmbier, ultimately leading to that fine young man’s death.  

All the while, the regime has pursued nuclear weapons with the deluded hope that it could blackmail its way to the ultimate objective. And that objective we are not going to let it have. We are not going to let it have. All of Korea is under that spell, divided in half. South Korea will never allow what‘s going on in North Korea to continue to happen.

The North Korean regime has pursued its nuclear and ballistic missile programs in defiance of every assurance, agreement, and commitment it has made to the United States and its allies. It’s broken all of those commitments. After promising to freeze its plutonium program in 1994, it repeated [reaped] the benefits of the deal and then -- and then immediately continued its illicit nuclear activities.  

In 2005, after years of diplomacy, the dictatorship agreed to ultimately abandon its nuclear programs and return to the Treaty on Non-Proliferation. But it never did. And worse, it tested the very weapons it said it was going to give up. In 2009, the United States gave negotiations yet another chance, and offered North Korea the open hand of engagement. The regime responded by sinking a South Korean Navy ship, killing 46 Korean sailors. To this day, it continues to launch missiles over the sovereign territory of Japan and all other neighbors, test nuclear devices, and develop ICBMs to threaten the United States itself. The regime has interpreted America’s past restraint as weakness. This would be a fatal miscalculation. This is a very different administration than the United States has had in the past.

Today, I hope I speak not only for our countries, but for all civilized nations, when I say to the North: Do not underestimate us, and do not try us. We will defend our common security, our shared prosperity, and our sacred liberty.  

We did not choose to draw here, on this peninsula -- (applause) -- this magnificent peninsula -- the thin line of civilization that runs around the world and down through time. But here it was drawn, and here it remains to this day. It is the line between peace and war, between decency and depravity, between law and tyranny, between hope and total despair. It is a line that has been drawn many times, in many places, throughout history. To hold that line is a choice free nations have always had to make. We have learned together the high cost of weakness and the high stakes of its defense.  

America’s men and women in uniform have given their lives in the fight against Nazism, imperialism, Communism and terrorism.  

America does not seek conflict or confrontation, but we will never run from it. History is filled with discarded regimes that have foolishly tested America’s resolve.

Anyone who doubts the strength or determination of the United States should look to our past, and you will doubt it no longer. We will not permit America or our allies to be blackmailed or attacked. We will not allow American cities to be threatened with destruction. We will not be intimidated. And we will not let the worst atrocities in history be repeated here, on this ground, we fought and died so hard to secure. (Applause.)  

That is why I have come here, to the heart of a free and flourishing Korea, with a message for the peace-loving nations of the world: The time for excuses is over. Now is the time for strength. If you want peace, you must stand strong at all times. (Applause.) The world cannot tolerate the menace of a rogue regime that threatens with nuclear devastation.

All responsible nations must join forces to isolate the brutal regime of North Korea -- to deny it and any form -- any form of it.  

You cannot support, you cannot supply, you cannot accept. We call on every nation, including China and Russia, to fully implement U.N. Security Council resolutions, downgrade diplomatic relations with the regime, and sever all ties of trade and technology.

It is our responsibility and our duty to confront this danger together -- because the longer we wait, the greater the danger grows, and the fewer the options become. (Applause.) And to those nations that choose to ignore this threat, or, worse still, to enable it, the weight of this crisis is on your conscience.  

I also have come here to this peninsula to deliver a message directly to the leader of the North Korean dictatorship: The weapons you are acquiring are not making you safer. They are putting your regime in grave danger. Every step you take down this dark path increases the peril you face.  

North Korea is not the paradise your grandfather envisioned. It is a hell that no person deserves. Yet, despite every crime you have committed against God and man, you are ready to offer, and we will do that -- we will offer a path to a much better future. It begins with an end to the aggression of your regime, a stop to your development of ballistic missiles, and complete, verifiable, and total denuclearization. (Applause.)  

A sky-top view of this peninsula shows a nation of dazzling light in the South and a mass of impenetrable darkness in the North. We seek a future of light, prosperity, and peace. But we are only prepared to discuss this brighter path for North Korea if its leaders cease their threats and dismantle their nuclear program.  

The sinister regime of North Korea is right about only one thing: The Korean people do have a glorious destiny, but they could not be more wrong about what that destiny looks like. The destiny of the Korean people is not to suffer in the bondage of oppression, but to thrive in the glory of freedom. (Applause.)  

What South Koreans have achieved on this peninsula is more than a victory for your nation. It is a victory for every nation that believes in the human spirit. And it is our hope that, someday soon, all of your brothers and sisters of the North will be able to enjoy the fullest of life intended by God.  

Your republic shows us all of what is possible. In just a few decades, with only the hard work, courage, and talents of your people, you turned this war-torn land into a nation blessed with wealth, rich in culture, and deep in spirit. You built a home where all families can flourish and where all children can shine and be happy.  

This Korea stands strong and tall among the great community of independent, confident, and peace-loving nations. We are nations that respect our citizens, cherish our liberty, treasure our sovereignty, and control our own destiny. We affirm the dignity of every person and embrace the full potential of every soul. And we are always prepared to defend the vital interests of our people against the cruel ambition of tyrants.  

Together, we dream of a Korea that is free, a peninsula that is safe, and families that are reunited once again. We dream of highways connecting North and South, of cousins embracing cousins, and this nuclear nightmare replaced with the beautiful promise of peace.

Until that day comes, we stand strong and alert. Our eyes are fixed to the North, and our hearts praying for the day when all Koreans can live in freedom. (Applause.)

Thank you. (Applause.) God Bless You. God Bless the Korean people. Thank you very much. Thank you. (Applause.)  

1223 chain pulley