රෝහිත_රාජපක්ෂ_Song

[Jack_Sparrow]

මහින්ද වගේ උත්තමයෙකුගේ පුතෙක්ට මෙවැනි දස්කම් කරන්න පුලුවන් කියන එක අරුමයක්ද ?

Nissan GTR alpha 9 kit Drag racer, satellite project mentor, meteoroids prediction specialist, federal political lecturer and brilliant musician.

පට්ට all rounder කෙනෙක් මචං.

ගොන් ටොයියනේ බලා ගනිල්ලා, සන්නස්ගල පිරිභාකරන්ගේ සුක්‍රානු හොයද්දී සිංහළේ රජුගේ සුක්‍රාණුවේ වැඩ...

proud of you chichiiii

 

[RandomGuy]

Those people are attention whores.

 

[maxboysl]

aulak naha ban. සම්නයෙන් අහන්න පුලුවන්කමක් තියනවා. සාමාන්‍ය ලස්සනක් තියනවා සින්දුවේ

 

[hirashgeff]

හැකියාවක් තියෙන කොල්ලෙක්. (ඌම කිව්වනම් , නැතුව ලිප් සින්ක් දෙනවද දන්නේ නෑ)

 

[rajitha_ks]

හැකියාවක් තියෙන කොල්ලෙක්. (ඌම කිව්වනම් , නැතුව ලිප් සින්ක් දෙනවද දන්නේ නෑ)

he's a staff member and a ph.d student of the Mathematics department of Colombo university.

http://science.cmb.ac.lk/departments/mathematics/research-development-centre/staff/

according to the site, he's a member of mathematical modelling research group

 

[mldarshana]

This is software, not music

 

[hirashgeff]

he's a staff member and a ph.d student of the Mathematics department of Colombo university.

http://science.cmb.ac.lk/departments/mathematics/research-development-centre/staff/

according to the site, he's a member of mathematical modelling research group

ඕක හින්දම තමයි බන් මේ කියන සිංදුව මූ කියනවා කියලා සුවර් නැත්තේ. ඒ කාලේ මුන් කරේ ඔය වගේ වැඩනේ.
1 නාමල්ට විතරක් වෙනම කාමරයකින් නිති විභාගේ ලියන්න ඉඩ හමබවුනා සියේන් 99ක් ලකුනු ගත්තා
2 යොෂි සා/පේ නැතුවම ඇවිත් හොඳම කැඩේට් නිලධාරියා, දක්ෂම වෙඩිකික්කරුවා වුනා.
3 රොහිත එ/ල් මැත නොකරම ස්පේස් ඉන්ජිනියර් කෙනෙක් වෙලා රොකට් එකකුත් යැව්වා.

 

[dasss]

රොකට් ayya yawapu රොකට් eka wage da dan nha
artist, lyrics and melody thunama wena wunge nama muge

sng eka nam kujithai

pehedili eershiyaw

 

[rajitha_ks]

ඕක හින්දම තමයි බන් මේ කියන සිංදුව මූ කියනවා කියලා සුවර් නැත්තේ. ඒ කාලේ මුන් කරේ ඔය වගේ වැඩනේ.
1 නාමල්ට විතරක් වෙනම කාමරයකින් නිති විභාගේ ලියන්න ඉඩ හමබවුනා සියේන් 99ක් ලකුනු ගත්තා
2 යොෂි සා/පේ නැතුවම ඇවිත් හොඳම කැඩේට් නිලධාරියා, දක්ෂම වෙඩිකික්කරුවා වුනා.
3 රොහිත එ/ල් මැත නොකරම ස්පේස් ඉන්ජිනියර් කෙනෙක් වෙලා රොකට් එකකුත් යැව්වා.

says JVP

btw, according to news reports, he was recruited to cmb uni in 2015.. can't really say political influence under yahapalanaya government.

 

[asylum]

 

[hirashgeff]

pehedili eershiyaw

ඔය සින්දුවක් කිවට ඉරිසියා වෙන්නේ මොකටද බන් ? හැබැයි ඔය සෙට් එක සුවර් නෑ. අනුන්ගේ දේ හොරකන් කරලා තමන්ගේ වගේ දෙන්න දක්ෂයෝ. කාලයක් තිබ්බ නේ මෙයාලම තරඟ සංවිධාන කරලා ,මෙයාලම තරග කරලා , මෙයාලම තරඟ දිනලා ,මෙයාල මෙයාලටම තෑගි දුන්න .ඒ හින්දයි සුවර් නැත්තේ

 

[rajitha_ks]

This is software, not music

yeah.. much like what iraj do. although you hear so many instruments being played, it's only one keyboard and a computer. all sounds are synthesized. there's no band.

that's why i said this is not my kind of music. sadly, this is the new trend in sri lanka. pathetic.

 

[rajitha_ks]

ඔය සින්දුවක් කිවට ඉරිසියා වෙන්නේ මොකටද බන් ? හැබැයි ඔය සෙට් එක සුවර් නෑ. අනුන්ගේ දේ හොරකන් කරලා තමන්ගේ වගේ දෙන්න දක්ෂයෝ. කාලයක් තිබ්බ නේ මෙයාලම තරඟ සංවිධාන කරලා ,මෙයාලම තරග කරලා , මෙයාලම තරඟ දිනලා ,මෙයාල මෙයාලටම තෑගි දුන්න .ඒ හින්දයි සුවර් නැත්තේ

දැන් තියෙන්නෙ සිරිසේන රෙජීමයනෙ. ඒකෙත් එහෙම වෙනවද අප්පා?

 

[rajitha_ks]

Research Topic: Mathematical optimization of space debris mitigation and Strategy analysis

Group:Dr. JK Wijeratne, Mr. C.R Rajapaksa.


Introduction:
Space activities conducted by humans on Earth orbit began with the first launch of the artificial satellite Sputnik1 in 1957. Since then, orbital debris has increased with time and approximately 19,000 objects larger than 10cm and approximately 500,000 particles between 1 and 10 cm’s exist in space and probably tens of millions of particles smaller than 1cm roams in orbit today. U.S. Space Surveillance Network tracks larger orbital objects (> 10cm) and approximately 15,000 objects were in their catalogue as of 1st May 2010. Fifty percent of all orbital debris is vulnerable to collisions, which result in fragmentation of debris and that leads to a rise in the debris populations in the future even in the absence of future space launches.


Mechanisms for Removing or reducing space debris


1) Minimizing the break up potential during operational phases
2) Limiting the accidental collision in orbit
3) Avoiding intentional destructive and harmful operations (deliberate collisions) in orbit
4) Limiting debris released during normal operations
5) Limiting long-term presence of launch vehicle and the spacecraft in low earth orbit (LEO) region and geosynchronous (GEO) region after end of their missions
6) Taking active measures to deorbit or move debris to alternative orbits


From the above mechanisms, the active measures to deorbit the debris object have been chosen for the suggesting study. The international space community has focused on debris mitigation measures that lasted a decade, and they have introduced policies and guidelines to address these issues. In 2007, the United Nations adopted space debris mitigation guidelines. However, adopting these guidelines was not sufficient to stabilize the LEO debris environment, nevertheless active debris removal methods may help to control the situation. Moreover, active debris removal methods will enhance the reliability of future space systems. These methods need to address technological, financial and political constraints when being implemented. Furthermore, these systems should identify effective mitigation and removal strategies based on reliability, robust criteria and appropriate performance metrics. Previous studies used high-definition models of space debris environment to select these criteria and metrics on a relatively ad-hoc basis. Therefore, there is still a current requirement to identify a potentially optimal solution for space debris removal.


This field of research commenced more than twenty-five years ago and numerous methods were proposed to remove large debris.


Objectives of the research
It is suggested that when a single vehicle attempts to carry severaldeorbiting packages within different inclinations, even at same altitudes it requires a very high fuel mass and delta-v due to the plane changes that should be attended by the spacecraft. Equipped iron engines with satellites could also be used to direct debris back to the earth’s atmosphere. However, due to the high-energy requirements, this was also not worth being operational in the past. In addition, it requires a long-term power source and attitude control sub systems. This implies a practical approach to orbital debris removal process that needs to be developed more thoroughly to adopt a feasible system. This leads the main objective of the this research to find the best optimum solution to deorbit the debris to a position approximately below 100km of altitude to completely decay the debris object in the earth’s atmosphere. The optimum solution will be future analyzed to give out the best mission options in order to identify the most effective sequence of debris that needs to be de-orbited with priority. Technical communities have focused to obtain precise information about debris via the SGP4 model as it helps to predict these orbital debris objects more effectively. Consequently, the author of this study decides to use the SGP4(Simplified General Perturbation) model




මුගෙ research project එක
http://science.cmb.ac.lk/departments/mathematics/research/postgraduate-research-projects/

 

[hirashgeff]

says JVP

btw, according to news reports, he was recruited to cmb uni in 2015.. can't really say political influence under yahapalanaya government.

නෑ බන් 2014.

http://www.ft.lk/article/340056/Rohitha-Rajapaksa-takes-yet-another-step-towards-his-space-ambitions

 

[hirashgeff]

Research Topic: Mathematical optimization of space debris mitigation and Strategy analysis

Group:Dr. JK Wijeratne, Mr. C.R Rajapaksa.


Introduction:
Space activities conducted by humans on Earth orbit began with the first launch of the artificial satellite Sputnik1 in 1957. Since then, orbital debris has increased with time and approximately 19,000 objects larger than 10cm and approximately 500,000 particles between 1 and 10 cm’s exist in space and probably tens of millions of particles smaller than 1cm roams in orbit today. U.S. Space Surveillance Network tracks larger orbital objects (> 10cm) and approximately 15,000 objects were in their catalogue as of 1st May 2010. Fifty percent of all orbital debris is vulnerable to collisions, which result in fragmentation of debris and that leads to a rise in the debris populations in the future even in the absence of future space launches.


Mechanisms for Removing or reducing space debris


1) Minimizing the break up potential during operational phases
2) Limiting the accidental collision in orbit
3) Avoiding intentional destructive and harmful operations (deliberate collisions) in orbit
4) Limiting debris released during normal operations
5) Limiting long-term presence of launch vehicle and the spacecraft in low earth orbit (LEO) region and geosynchronous (GEO) region after end of their missions
6) Taking active measures to deorbit or move debris to alternative orbits


From the above mechanisms, the active measures to deorbit the debris object have been chosen for the suggesting study. The international space community has focused on debris mitigation measures that lasted a decade, and they have introduced policies and guidelines to address these issues. In 2007, the United Nations adopted space debris mitigation guidelines. However, adopting these guidelines was not sufficient to stabilize the LEO debris environment, nevertheless active debris removal methods may help to control the situation. Moreover, active debris removal methods will enhance the reliability of future space systems. These methods need to address technological, financial and political constraints when being implemented. Furthermore, these systems should identify effective mitigation and removal strategies based on reliability, robust criteria and appropriate performance metrics. Previous studies used high-definition models of space debris environment to select these criteria and metrics on a relatively ad-hoc basis. Therefore, there is still a current requirement to identify a potentially optimal solution for space debris removal.


This field of research commenced more than twenty-five years ago and numerous methods were proposed to remove large debris.


Objectives of the research
It is suggested that when a single vehicle attempts to carry severaldeorbiting packages within different inclinations, even at same altitudes it requires a very high fuel mass and delta-v due to the plane changes that should be attended by the spacecraft. Equipped iron engines with satellites could also be used to direct debris back to the earth’s atmosphere. However, due to the high-energy requirements, this was also not worth being operational in the past. In addition, it requires a long-term power source and attitude control sub systems. This implies a practical approach to orbital debris removal process that needs to be developed more thoroughly to adopt a feasible system. This leads the main objective of the this research to find the best optimum solution to deorbit the debris to a position approximately below 100km of altitude to completely decay the debris object in the earth’s atmosphere. The optimum solution will be future analyzed to give out the best mission options in order to identify the most effective sequence of debris that needs to be de-orbited with priority. Technical communities have focused to obtain precise information about debris via the SGP4 model as it helps to predict these orbital debris objects more effectively. Consequently, the author of this study decides to use the SGP4(Simplified General Perturbation) model




මුගෙ research project එක
http://science.cmb.ac.lk/departments/mathematics/research/postgraduate-research-projects/

මුගේ රිසර්ච් ප්‍රොජෙක්ට් එක කොහෙන් හරි උස්ස්පු එකක්. මේ වගේ දෙවල් වලට හරි දස්සයි මුන්. 2014 වගේ තමයි කොලඹ යුනි එකට ඇවිත් ඉන්නේ

 

[rajitha_ks]

මුගේ රිසර්ච් ප්‍රොජෙක්ට් එක කොහෙන් හරි උස්ස්පු එකක්. මේ වගේ දෙවල් වලට හරි දස්සයි මුන්. 2014 වගේ තමයි කොලඹ යුනි එකට ඇවිත් ඉන්නේ

කොහෙන්ද ඉස්සුවෙ?
චතුර සේනාරත්නද උස්සනව ඇස් දෙකට දැකපු කෙනා?

හොර කරනවනම් mathematical modeling research එකක් තෝරගන්නවද බන් මිනිහෙක්?
ඔය ඕන තරම් ලේසි ඒව තියෙන්නෙ.

2005-2009 කාලෙ අපේ faculty එකේ හිටිය Dr. Darmadasa කියල sir කෙනෙක්. පොර තමයි fluid dynamics වලට ලංකාවෙ හිටිය ලොකුම පොර. මම ගිහින් අවුරුද්දක් විතර ගිහාම මුගෙ නම දාල තියෙනව Mr. Darmadasa කියල. කට්ටිය හොයල බැලුව Dr. එක පාරටම Mr. උනේ කොහොමද කියල.

මූ මුගෙ ph.d එකට කරපු thesis එක පාවිච්චි කරල වෙන එකෙක් (මතක විදිහට ඉන්දියන් කාරයෙක්) වෙන තියරියක් prove කරන්න ගිහින්. ඌට අහු වෙලා මුගෙ paper එකේ වැරැද්දක්. ඒක නිසා අවුරුදු ගානකට පස්සෙ මුගෙ phd එක withdraw කරල. පොර ඊට අවුරුද්දකට විතර පස්සෙ retire උනා mr. විදිහට.

science phd, විශේෂයෙන් ගණිතයට සම්බන්ධ ඒව ආවට ගියාට කරොත් බඩුම තමයි.

ඕන ගොනෙක් හොර කරන්න ඕනිනම් ගණිතය විශය තෝරගන්නෙ නෑ.

 

[rajitha_ks]

නෑ බන් 2014.

http://www.ft.lk/article/340056/Rohitha-Rajapaksa-takes-yet-another-step-towards-his-space-ambitions

+rep for correcting me.

 

[hancok]

ade maru meeka

 

[Hapuwa]

ඔය සින්දුවක් කිවට ඉරිසියා වෙන්නේ මොකටද බන් ? හැබැයි ඔය සෙට් එක සුවර් නෑ. අනුන්ගේ දේ හොරකන් කරලා තමන්ගේ වගේ දෙන්න දක්ෂයෝ. කාලයක් තිබ්බ නේ මෙයාලම තරඟ සංවිධාන කරලා ,මෙයාලම තරග කරලා , මෙයාලම තරඟ දිනලා ,මෙයාල මෙයාලටම තෑගි දුන්න .ඒ හින්දයි සුවර් නැත්තේ