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Wednesday 8 December 2010
Problem of the moral theory - Partial answer
Surely, for the person, even for wrong decisions, knowing things is much preferred than not knowing though not knowing gives right logic to the wrong decision. May be given: should human flesh be provided, sold, and eaten, shall the customers know the truth or not? The truth must be revealed is the preferred answer in the theory.
Tuesday 7 December 2010
Problem of the moral theory
A friend of mine suggested the problem of conscientiousness: intended distortion of information and not.
Monday 15 November 2010
Korean Galaxy S upgraded into froyo
Today, galaxy s in Korea is upgraded into android froyo. You may know the conflicts between Samsung and SK Telecom. The final version is little bit worse than the last firmware. It means, the last firm was the very complete version of Samsung on the ecclair. The base memory use is about 160MB out of 340MB, while the last version uses 112MB out of 310 MB. You need to initialise the phone to make speedy after the installation. Still lags in some point. You cannot delete Google account in froyo, and cannot even change the password, and I think it is platform problem, so cannot be wished to be fixed until the next android.Also, you do not have to enter annoying T store as the market includes it.
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Thursday 11 November 2010
Problem: Disappearance of gravitation
Region: Newton Mechanics, Classical Gravitation.
Consider a static, uniform spherical mass (star) and an object, particle mass, which is approaching to the star by only the gravitation of the star during \(t=-\infty\) through \(t=0\), where no collision occurs. At \(t=0\), sudden explosion of the star occurs, and the mass of the star is spread uniformly over the infinite universe, thus which is equivalent to the star disappearing, within negligible time interval. (a) What does happen to the object? Does any physical quantity change between the before and the after of the explosion? Assume the mass of the star can penetrate anything so that any effect of contact (collision) is not but is only of the distant force field. (b) Obtain the total mechanical energy of the object before and after the explosion. Does it make sense? (c) Calculate the total energy of the system before and after the explosion. Does it make sense? (d) How much of energy should be supplied or subtracted for occurence of the explosion? (e) At the explosion, energy E is born with loss of mass \(\frac{E}{c^2}\) of the star. How much the mass is lost? (f) On what criteria does this kind of explosion never happen? Compare to the Schwarzschild radius \(r_s=\frac{2GM}{c^2}\).(C) Albertus Liberius
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Solution
(a) As no force field acts, the object will conserve the momentum (inertial motion)
(b) Just before the explosion, \(E = \frac{1}{2} mv^2 - \frac{GMm}{r}\). Just after the explosion, \(E = \frac{1}{2} mv^2\). It does not make sense.
(c) The gravitational bonding energy (internal energy) is \(-\int_0^{M(R)} \frac{GM(r) dM(r)}{r} = -\int_0^R \frac{G}{r} \rho \frac{4}{3} \pi r^3 \rho 4\pi r^2 dr = -\frac{16}{15}\pi^2 R^5 G \rho^2 = -\frac{3}{5}\frac{GM^2}{R}\). Thus, before: \(E = \frac{1}{2} mv^2 - \frac{GMm}{r} - \frac{3}{5}\frac{GM^2}{R}\); and after: \(E = \frac{1}{2} mv^2\). It does not make sense.
(d) \(\Delta E = \frac{GMm}{r} + \frac{3}{5}\frac{GM^2}{R} \) is required to be supplied for occurrence of the explosion.
(e) \(-\Delta M = \frac{GMm}{rc^2} + \frac{3}{5}\frac{GM^2}{Rc^2} \) should be lost to supply the energy.
(f) \( \frac{GMm}{rc^2} + \frac{3}{5}\frac{GM^2}{Rc^2} > M\) i.e. \(R \leq \frac{\frac{3}{5}\frac{GM}{c^2}}{1-\frac{Gm}{rc^2}} \approx\frac{3}{10}r_s\) as \(1 \gg \frac{Gm}{rc^2}\)
(b) Just before the explosion, \(E = \frac{1}{2} mv^2 - \frac{GMm}{r}\). Just after the explosion, \(E = \frac{1}{2} mv^2\). It does not make sense.
(c) The gravitational bonding energy (internal energy) is \(-\int_0^{M(R)} \frac{GM(r) dM(r)}{r} = -\int_0^R \frac{G}{r} \rho \frac{4}{3} \pi r^3 \rho 4\pi r^2 dr = -\frac{16}{15}\pi^2 R^5 G \rho^2 = -\frac{3}{5}\frac{GM^2}{R}\). Thus, before: \(E = \frac{1}{2} mv^2 - \frac{GMm}{r} - \frac{3}{5}\frac{GM^2}{R}\); and after: \(E = \frac{1}{2} mv^2\). It does not make sense.
(d) \(\Delta E = \frac{GMm}{r} + \frac{3}{5}\frac{GM^2}{R} \) is required to be supplied for occurrence of the explosion.
(e) \(-\Delta M = \frac{GMm}{rc^2} + \frac{3}{5}\frac{GM^2}{Rc^2} \) should be lost to supply the energy.
(f) \( \frac{GMm}{rc^2} + \frac{3}{5}\frac{GM^2}{Rc^2} > M\) i.e. \(R \leq \frac{\frac{3}{5}\frac{GM}{c^2}}{1-\frac{Gm}{rc^2}} \approx\frac{3}{10}r_s\) as \(1 \gg \frac{Gm}{rc^2}\)
Thursday 28 October 2010
Kimpo airport
First flight only for domestic
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Wednesday 27 October 2010
On ktx
Tuesday 19 October 2010
Thursday 7 October 2010
On some day
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Friday 1 October 2010
Philosophical consideration concerning information theory - principle
First, as assumption, anyone can only find a way to do right with its accessible information including indirect information, which is deriven from the direct information. Thus, information which is believed to be exist but can never be obtained or inferred by any means does never exist on the physical frame of one who is watching, or the conspect, which means a view of universe.
The second law of thermodynamics should be accepted as it is physically proven. The law says that information decreases in whole by time. Id est, lost information is always more than new information. Also, quantum mechanics says that information lost once is never recovered and that information cannot be duplicated.
Thus, destroying information supports the flow for the end and is irreversible. Preserving information is making lives of ours and our universe longer, and as any existence exists at least principally not for being destroyed, morally preserving information is more proposed behaviour; specifically life is defined as an existence which produce information, so life is much more proposed to be preserved.
The second law of thermodynamics should be accepted as it is physically proven. The law says that information decreases in whole by time. Id est, lost information is always more than new information. Also, quantum mechanics says that information lost once is never recovered and that information cannot be duplicated.
Thus, destroying information supports the flow for the end and is irreversible. Preserving information is making lives of ours and our universe longer, and as any existence exists at least principally not for being destroyed, morally preserving information is more proposed behaviour; specifically life is defined as an existence which produce information, so life is much more proposed to be preserved.
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Thursday 2 September 2010
Korean Portal Site Naver Releases Free Online Office Suite
http://muzbox.tistory.com/531
Naver released Naver word, whose designation and colour style is similar to ubuntu template so it looks like ubuntu, but different; it seems operates on even firefox; considering the Korean closed environment of Internet, it is very advanced and coherent with the Naver’s policy since a few years ago when the site is available on firefox.
Tuesday 18 May 2010
Principia
Status sunt. Status res Quomodo esse sunt. Status sunt axiomata ultima intelligere universitatem et logicam et humanitatem. Infusitas de statu in statum est physica. Possideas indeque liberes pondum sub divo, status possidens et status cadentes sunt, atque infusitas est de statu possidenti in statum cadentem, itaque conspectus movet de infusitatibus. Sint infusitas de statu primo in statum secundum et infusitas de statu secundo in statum tertium, est transitivum infusitatis de statu primo in statum tertium. Infusitas de statu possidente in statum cadentem et infusitas de statu cadente in statum cadentiorem sint, transitivum est infusitas de state possidente in statum cadentiorem.
Saturday 27 March 2010
Praefatio Libris: quod physica?
Physica varium vult; verbum ipsum a Graeca ‘φύσις’ oritur atque significatio extendit physica crescere. Ergo physica scientiam atque philosophiam naturalem et universum et naturam vult, itaque pro intellegere philosophiam sub scientiam potes studere philosophiam humanum, quae aliqua philosophia hodierna congruit non, atque quae magna momenta est intellegere rationem.
Tuesday 16 March 2010
Utilitarianism
Utilitarianism is the method of selecting right thing to maximise the total utility. Basically, every situation is probabilitical, so actually you must choose most probably maximising way. Id est, you must choose in the situation. Utilitarianism itself is consequensism, but it is the greedy-algorithmic version.
Then, here is the topic: actually you are very hard to measure the whole utility and make decision with your consumption of utility in real situation if you are utilitarian. And, this is right according to the above. However, if real situation is far different from what you assumed, which is right?
Then, here is the topic: actually you are very hard to measure the whole utility and make decision with your consumption of utility in real situation if you are utilitarian. And, this is right according to the above. However, if real situation is far different from what you assumed, which is right?
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