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NASA Made the Hubble Telescope to Be Remade

 


Re: The Energy Department just made one plutonium pit. Making more is uncertain - Bulletin of the Atomic Scientists

 

¿ªÔÆÌåÓý

Klink nie na ¡®n lekker plek om te werk nie!

?

From: [email protected] <[email protected]> On Behalf Of bernhard via groups.io
Sent: Friday, 11 October 2024 18:05
To: [email protected]
Subject: Re: [ZA-energie] The Energy Department just made one plutonium pit. Making more is uncertain - Bulletin of the Atomic Scientists

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CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

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Die koste van die VSA se opdatering van sy stelsel is $1.7 triljoen?

Kenners reken dat Rusland se "pitte" nie opgedateer is nie, en dat as een gelanseer sou word, daar 'n goeie kans is dat dit nie sal ontplof nie.

On 2024/10/10 17:41, Pieter Van der Walt wrote:

?

The integrity and confidentiality of this email are governed by these terms.
Die integriteit en vertroulikheid van hierdie e-pos word deur die volgende bepalings bere?l.


Re: The Energy Department just made one plutonium pit. Making more is uncertain - Bulletin of the Atomic Scientists

 

¿ªÔÆÌåÓý

Die koste van die VSA se opdatering van sy stelsel is $1.7 triljoen?

Kenners reken dat Rusland se "pitte" nie opgedateer is nie, en dat as een gelanseer sou word, daar 'n goeie kans is dat dit nie sal ontplof nie.

On 2024/10/10 17:41, Pieter Van der Walt wrote:

?
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The Energy Department just made one plutonium pit. Making more is uncertain - Bulletin of the Atomic Scientists

 

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Re: Ruimtekrag

 

Hi Bernhard
Die probleem is nie aan die optiese kant nie. Om die opgewekte drywing met mikrogolf aarde toe te straal is waar die probleem l¨º.?
My syfers is vir golwe met 'n golflengte van 300 mm (1 GHz) en die vergelykings vir 'n antenne wat ook fase in ag neem. As die skottel nie daardie toleransies handhaaf nie sal die golwe nie koherent sommeer en 'n skerp bundel vorm nie.

Groete
PW

On Wed, Oct 9, 2024 at 8:32?PM bernhard via <bernhard=[email protected]> wrote:

Ek neem aan die artikel waarna verwys word is .? Vir sonlig is die spektrum gekonsentreer rondom 500 nm, meer as 'n miljoen keer soveel as 300 mm.? Dan is eenvoudige reflektore wat mooi plat is en korrek gerig word al wat nodig is in die ruimte (lae baan LEO).? Groter maar origens veel makliker as wat reeds met die James Webb teleskoop (JWT) bereik is -- vir die reflektore is die afstand maar so ~1500 km van die aarde, terwyl dit vir JWT 1.5 miljoen km is. Dit is sowat 1000 keer soveel.

En met die reflektor so na aan die aarde, en die golflengtes so kort, sal geometriese optika voldoende wees -- eerder as die orde 100 nm akkuraatheid wat nodig is by JWT.? 'n Tegnies relatief maklike doel, wat myns insiens reeds in of dalk selfs voor die 1930s kan werk.? Dis nou as Elon hom maar hierop wil toespits eerder as om hom met Twitter/X of politiek te wil bemoei!??

Hierdie opsie maak van PV plase op die grond gebruik, eerder as PV in die ruimte.? En vul daardie plase se opbrengs aan van bv 'n uur of twee voor sononder tot so 2 of 4 ure na sononder.? Dit is gedurende tye van piek-aanvraag.? En van bv 2 uur voor sonop tot 2 ure na sonop.? Ook tye wanneer gewone PV tekortskiet.??

As die sonplase bv in die NoordKaap of NoordWes Provinsie sou wees, sal daar nie te dikwels wolke wees wat die gereflekteerde son sal afkeer nie.? Eskom se kragnet-opvolger moet net die transmissielyne bou.? Transmissielyne wat met hierdie reflektor-stalliete vir baie meer (tipies dubbel soveel) ure per jaar sal kan PV krag lewer as sonder die reflektore.? As daar groot Li-ioon of Na-ioon batterye by die plase opgerig word, kan krag op meeste dae vir 24 uur / dag gelewer word

On 2024/10/09 08:27, Wolhuter, Riaan, Dr [wolhuter@...] via wrote:

Nee, gaan nie werk nie¡­

?

From: [email protected] <[email protected]> On Behalf Of Pieter Van der Walt via
Sent: Tuesday, 08 October 2024 23:14
To: [email protected]
Subject: Re: [ZA-energie] Ruimtekrag

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Ja, die ruimteverspreiding?oor daardie afstand is so groot dat jy 'n baie groot antenne nodig het om? 'n smal bundel te vorm en 'n antenne met 'n baie groot ontvangs oppervlakte op aarde nodig het om 'n goeie breuk van die uitgestraalde?drywing op te vang.?

Om 'n paar syfers te noem:

'n Kol van omtrent 10 km deursnit op aarde benodig?bo 'n antenne met 'n deursnit van? sowat 3600 golflengtes. Met 'n golflengte van 300 mm werk dit uit op 'n skottel met 'n deursnit van omtrent 'n kilometer. Die toelaatbare afwyking? van die?oppervlakteprofiel?vanaf 'n perfekte parabolo?ed?is 'n wortel-gemiddeld kwadraat fout van die orde van 1/12 golflengte, of 25 mm. Jy moet nou al die boumateriaal hiervoor van die aarde af lanseer in 'n geosinkrone wentelbaan.

Die 10 km deursnit antenne op aarde moet dieselfde akkuraatheid handhaaf om die golwe koherent te kan sommeer.

?

?

Dit word 'n baie baie vinnig 'n baie? duur speletjie!

?

On Mon, Oct 7, 2024 at 12:12?PM Wolhuter, Riaan, Dr [wolhuter@...] via <wolhuter=[email protected]> wrote:

Die kwadratiese verswakking met beide afstand en frekwenie oor 36000 km is baie hoog

?

From: [email protected] <[email protected]> On Behalf Of bernhard via
Sent: Monday, 07 October 2024 11:59
To: [email protected]
Subject: Re: [ZA-energie] Ruimtekrag

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Ja.? Geostasionere baan is baie ver, wat logistiek duur maak, en mikrogolwe wyd laat sprei, sodat dit nie op klein- of medium skaal bedryf kan word nie.? Maar ek sou graag die artikel wou sien!

On 2024/10/07 10:36, Wolhuter, Riaan, Dr [wolhuter@...] via wrote:

Stem heeltemal saam met daardie siening.

?

From: [email protected] <[email protected]> On Behalf Of Pieter Van der Walt via
Sent: Monday, 07 October 2024 10:02
To: ZA_energie <[email protected]>
Subject: Re: [ZA-energie] Ruimtekrag

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Hi Bernhard

Dit wys by my 'n prentjie. Dit is 'n redakteursnota vir 'n artikel in IEEE Spectrum wat bevestig dat 'n ruimtekragstasie wat mikrogolfdrywing na die aarde straal glad nie haalbaar is itv koste, tegniese en logistieke uirdagings nie.

?

On Sun, 06 Oct 2024, 20:37 bernhard via , <bernhard=[email protected]> wrote:

Die skakel hieronder wil nie oopmaak nie!

On 2024/10/06 19:31, Pieter Van der Walt wrote:

Ek stem heelhartig saam.

The integrity and confidentiality of this email are governed by these terms.
Die integriteit en vertroulikheid van hierdie e-pos word deur die volgende bepalings bere?l.


Re: Ruimtekrag

 

¿ªÔÆÌåÓý

2030s

On 2024/10/09 20:32, bernhard wrote:

Ek neem aan die artikel waarna verwys word is .? Vir sonlig is die spektrum gekonsentreer rondom 500 nm, meer as 'n miljoen keer soveel as 300 mm.? Dan is eenvoudige reflektore wat mooi plat is en korrek gerig word al wat nodig is in die ruimte (lae baan LEO).? Groter maar origens veel makliker as wat reeds met die James Webb teleskoop (JWT) bereik is -- vir die reflektore is die afstand maar so ~1500 km van die aarde, terwyl dit vir JWT 1.5 miljoen km is. Dit is sowat 1000 keer soveel.

En met die reflektor so na aan die aarde, en die golflengtes so kort, sal geometriese optika voldoende wees -- eerder as die orde 100 nm akkuraatheid wat nodig is by JWT.? 'n Tegnies relatief maklike doel, wat myns insiens reeds in of dalk selfs voor die 2030s kan werk.? Dis nou as Elon hom maar hierop wil toespits eerder as om hom met Twitter/X of politiek te wil bemoei!??

Hierdie opsie maak van PV plase op die grond gebruik, eerder as PV in die ruimte.? En vul daardie plase se opbrengs aan van bv 'n uur of twee voor sononder tot so 2 of 4 ure na sononder.? Dit is gedurende tye van piek-aanvraag.? En van bv 2 uur voor sonop tot 2 ure na sonop.? Ook tye wanneer gewone PV tekortskiet.??

As die sonplase bv in die NoordKaap of NoordWes Provinsie sou wees, sal daar nie te dikwels wolke wees wat die gereflekteerde son sal afkeer nie.? Eskom se kragnet-opvolger moet net die transmissielyne bou.? Transmissielyne wat met hierdie reflektor-stalliete vir baie meer (tipies dubbel soveel) ure per jaar sal kan PV krag lewer as sonder die reflektore.? As daar groot Li-ioon of Na-ioon batterye by die plase opgerig word, kan krag op meeste dae vir 24 uur / dag gelewer word

On 2024/10/09 08:27, Wolhuter, Riaan, Dr [wolhuter@...] via groups.io wrote:

Nee, gaan nie werk nie¡­

?

From: [email protected] <[email protected]> On Behalf Of Pieter Van der Walt via groups.io
Sent: Tuesday, 08 October 2024 23:14
To: [email protected]
Subject: Re: [ZA-energie] Ruimtekrag

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Ja, die ruimteverspreiding?oor daardie afstand is so groot dat jy 'n baie groot antenne nodig het om? 'n smal bundel te vorm en 'n antenne met 'n baie groot ontvangs oppervlakte op aarde nodig het om 'n goeie breuk van die uitgestraalde?drywing op te vang.?

Om 'n paar syfers te noem:

'n Kol van omtrent 10 km deursnit op aarde benodig?bo 'n antenne met 'n deursnit van? sowat 3600 golflengtes. Met 'n golflengte van 300 mm werk dit uit op 'n skottel met 'n deursnit van omtrent 'n kilometer. Die toelaatbare afwyking? van die?oppervlakteprofiel?vanaf 'n perfekte parabolo?ed?is 'n wortel-gemiddeld kwadraat fout van die orde van 1/12 golflengte, of 25 mm. Jy moet nou al die boumateriaal hiervoor van die aarde af lanseer in 'n geosinkrone wentelbaan.

Die 10 km deursnit antenne op aarde moet dieselfde akkuraatheid handhaaf om die golwe koherent te kan sommeer.

?

?

Dit word 'n baie baie vinnig 'n baie? duur speletjie!

?

On Mon, Oct 7, 2024 at 12:12?PM Wolhuter, Riaan, Dr [wolhuter@...] via <wolhuter=[email protected]> wrote:

Die kwadratiese verswakking met beide afstand en frekwenie oor 36000 km is baie hoog

?

From: [email protected] <[email protected]> On Behalf Of bernhard via
Sent: Monday, 07 October 2024 11:59
To: [email protected]
Subject: Re: [ZA-energie] Ruimtekrag

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Ja.? Geostasionere baan is baie ver, wat logistiek duur maak, en mikrogolwe wyd laat sprei, sodat dit nie op klein- of medium skaal bedryf kan word nie.? Maar ek sou graag die artikel wou sien!

On 2024/10/07 10:36, Wolhuter, Riaan, Dr [wolhuter@...] via wrote:

Stem heeltemal saam met daardie siening.

?

From: [email protected] <[email protected]> On Behalf Of Pieter Van der Walt via
Sent: Monday, 07 October 2024 10:02
To: ZA_energie <[email protected]>
Subject: Re: [ZA-energie] Ruimtekrag

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Hi Bernhard

Dit wys by my 'n prentjie. Dit is 'n redakteursnota vir 'n artikel in IEEE Spectrum wat bevestig dat 'n ruimtekragstasie wat mikrogolfdrywing na die aarde straal glad nie haalbaar is itv koste, tegniese en logistieke uirdagings nie.

?

On Sun, 06 Oct 2024, 20:37 bernhard via , <bernhard=[email protected]> wrote:

Die skakel hieronder wil nie oopmaak nie!

On 2024/10/06 19:31, Pieter Van der Walt wrote:

Ek stem heelhartig saam.

The integrity and confidentiality of this email are governed by these terms.
Die integriteit en vertroulikheid van hierdie e-pos word deur die volgende bepalings bere?l.


Re: Ruimtekrag

 

¿ªÔÆÌåÓý

Ek neem aan die artikel waarna verwys word is .? Vir sonlig is die spektrum gekonsentreer rondom 500 nm, meer as 'n miljoen keer soveel as 300 mm.? Dan is eenvoudige reflektore wat mooi plat is en korrek gerig word al wat nodig is in die ruimte (lae baan LEO).? Groter maar origens veel makliker as wat reeds met die James Webb teleskoop (JWT) bereik is -- vir die reflektore is die afstand maar so ~1500 km van die aarde, terwyl dit vir JWT 1.5 miljoen km is. Dit is sowat 1000 keer soveel.

En met die reflektor so na aan die aarde, en die golflengtes so kort, sal geometriese optika voldoende wees -- eerder as die orde 100 nm akkuraatheid wat nodig is by JWT.? 'n Tegnies relatief maklike doel, wat myns insiens reeds in of dalk selfs voor die 1930s kan werk.? Dis nou as Elon hom maar hierop wil toespits eerder as om hom met Twitter/X of politiek te wil bemoei!??

Hierdie opsie maak van PV plase op die grond gebruik, eerder as PV in die ruimte.? En vul daardie plase se opbrengs aan van bv 'n uur of twee voor sononder tot so 2 of 4 ure na sononder.? Dit is gedurende tye van piek-aanvraag.? En van bv 2 uur voor sonop tot 2 ure na sonop.? Ook tye wanneer gewone PV tekortskiet.??

As die sonplase bv in die NoordKaap of NoordWes Provinsie sou wees, sal daar nie te dikwels wolke wees wat die gereflekteerde son sal afkeer nie.? Eskom se kragnet-opvolger moet net die transmissielyne bou.? Transmissielyne wat met hierdie reflektor-stalliete vir baie meer (tipies dubbel soveel) ure per jaar sal kan PV krag lewer as sonder die reflektore.? As daar groot Li-ioon of Na-ioon batterye by die plase opgerig word, kan krag op meeste dae vir 24 uur / dag gelewer word

On 2024/10/09 08:27, Wolhuter, Riaan, Dr [wolhuter@...] via groups.io wrote:

Nee, gaan nie werk nie¡­

?

From: [email protected] <[email protected]> On Behalf Of Pieter Van der Walt via groups.io
Sent: Tuesday, 08 October 2024 23:14
To: [email protected]
Subject: Re: [ZA-energie] Ruimtekrag

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Ja, die ruimteverspreiding?oor daardie afstand is so groot dat jy 'n baie groot antenne nodig het om? 'n smal bundel te vorm en 'n antenne met 'n baie groot ontvangs oppervlakte op aarde nodig het om 'n goeie breuk van die uitgestraalde?drywing op te vang.?

Om 'n paar syfers te noem:

'n Kol van omtrent 10 km deursnit op aarde benodig?bo 'n antenne met 'n deursnit van? sowat 3600 golflengtes. Met 'n golflengte van 300 mm werk dit uit op 'n skottel met 'n deursnit van omtrent 'n kilometer. Die toelaatbare afwyking? van die?oppervlakteprofiel?vanaf 'n perfekte parabolo?ed?is 'n wortel-gemiddeld kwadraat fout van die orde van 1/12 golflengte, of 25 mm. Jy moet nou al die boumateriaal hiervoor van die aarde af lanseer in 'n geosinkrone wentelbaan.

Die 10 km deursnit antenne op aarde moet dieselfde akkuraatheid handhaaf om die golwe koherent te kan sommeer.

?

?

Dit word 'n baie baie vinnig 'n baie? duur speletjie!

?

On Mon, Oct 7, 2024 at 12:12?PM Wolhuter, Riaan, Dr [wolhuter@...] via <wolhuter=[email protected]> wrote:

Die kwadratiese verswakking met beide afstand en frekwenie oor 36000 km is baie hoog

?

From: [email protected] <[email protected]> On Behalf Of bernhard via
Sent: Monday, 07 October 2024 11:59
To: [email protected]
Subject: Re: [ZA-energie] Ruimtekrag

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Ja.? Geostasionere baan is baie ver, wat logistiek duur maak, en mikrogolwe wyd laat sprei, sodat dit nie op klein- of medium skaal bedryf kan word nie.? Maar ek sou graag die artikel wou sien!

On 2024/10/07 10:36, Wolhuter, Riaan, Dr [wolhuter@...] via wrote:

Stem heeltemal saam met daardie siening.

?

From: [email protected] <[email protected]> On Behalf Of Pieter Van der Walt via
Sent: Monday, 07 October 2024 10:02
To: ZA_energie <[email protected]>
Subject: Re: [ZA-energie] Ruimtekrag

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Hi Bernhard

Dit wys by my 'n prentjie. Dit is 'n redakteursnota vir 'n artikel in IEEE Spectrum wat bevestig dat 'n ruimtekragstasie wat mikrogolfdrywing na die aarde straal glad nie haalbaar is itv koste, tegniese en logistieke uirdagings nie.

?

On Sun, 06 Oct 2024, 20:37 bernhard via , <bernhard=[email protected]> wrote:

Die skakel hieronder wil nie oopmaak nie!

On 2024/10/06 19:31, Pieter Van der Walt wrote:

Ek stem heelhartig saam.

The integrity and confidentiality of this email are governed by these terms.
Die integriteit en vertroulikheid van hierdie e-pos word deur die volgende bepalings bere?l.


Re: Ruimtekrag

 

¿ªÔÆÌåÓý

Nee, gaan nie werk nie¡­

?

From: [email protected] <[email protected]> On Behalf Of Pieter Van der Walt via groups.io
Sent: Tuesday, 08 October 2024 23:14
To: [email protected]
Subject: Re: [ZA-energie] Ruimtekrag

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Ja, die ruimteverspreiding?oor daardie afstand is so groot dat jy 'n baie groot antenne nodig het om? 'n smal bundel te vorm en 'n antenne met 'n baie groot ontvangs oppervlakte op aarde nodig het om 'n goeie breuk van die uitgestraalde?drywing op te vang.?

Om 'n paar syfers te noem:

'n Kol van omtrent 10 km deursnit op aarde benodig?bo 'n antenne met 'n deursnit van? sowat 3600 golflengtes. Met 'n golflengte van 300 mm werk dit uit op 'n skottel met 'n deursnit van omtrent 'n kilometer. Die toelaatbare afwyking? van die?oppervlakteprofiel?vanaf 'n perfekte parabolo?ed?is 'n wortel-gemiddeld kwadraat fout van die orde van 1/12 golflengte, of 25 mm. Jy moet nou al die boumateriaal hiervoor van die aarde af lanseer in 'n geosinkrone wentelbaan.

Die 10 km deursnit antenne op aarde moet dieselfde akkuraatheid handhaaf om die golwe koherent te kan sommeer.

?

?

Dit word 'n baie baie vinnig 'n baie? duur speletjie!

?

On Mon, Oct 7, 2024 at 12:12?PM Wolhuter, Riaan, Dr [wolhuter@...] via <wolhuter=[email protected]> wrote:

Die kwadratiese verswakking met beide afstand en frekwenie oor 36000 km is baie hoog

?

From: [email protected] <[email protected]> On Behalf Of bernhard via
Sent: Monday, 07 October 2024 11:59
To: [email protected]
Subject: Re: [ZA-energie] Ruimtekrag

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Ja.? Geostasionere baan is baie ver, wat logistiek duur maak, en mikrogolwe wyd laat sprei, sodat dit nie op klein- of medium skaal bedryf kan word nie.? Maar ek sou graag die artikel wou sien!

On 2024/10/07 10:36, Wolhuter, Riaan, Dr [wolhuter@...] via wrote:

Stem heeltemal saam met daardie siening.

?

From: [email protected] <[email protected]> On Behalf Of Pieter Van der Walt via
Sent: Monday, 07 October 2024 10:02
To: ZA_energie <[email protected]>
Subject: Re: [ZA-energie] Ruimtekrag

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Hi Bernhard

Dit wys by my 'n prentjie. Dit is 'n redakteursnota vir 'n artikel in IEEE Spectrum wat bevestig dat 'n ruimtekragstasie wat mikrogolfdrywing na die aarde straal glad nie haalbaar is itv koste, tegniese en logistieke uirdagings nie.

?

On Sun, 06 Oct 2024, 20:37 bernhard via , <bernhard=[email protected]> wrote:

Die skakel hieronder wil nie oopmaak nie!

On 2024/10/06 19:31, Pieter Van der Walt wrote:

Ek stem heelhartig saam.

The integrity and confidentiality of this email are governed by these terms.
Die integriteit en vertroulikheid van hierdie e-pos word deur die volgende bepalings bere?l.


Re: Ruimtekrag

 

Ja, die ruimteverspreiding?oor daardie afstand is so groot dat jy 'n baie groot antenne nodig het om? 'n smal bundel te vorm en 'n antenne met 'n baie groot ontvangs oppervlakte op aarde nodig het om 'n goeie breuk van die uitgestraalde?drywing op te vang.?
Om 'n paar syfers te noem:
'n Kol van omtrent 10 km deursnit op aarde benodig?bo 'n antenne met 'n deursnit van? sowat 3600 golflengtes. Met 'n golflengte van 300 mm werk dit uit op 'n skottel met 'n deursnit van omtrent 'n kilometer. Die toelaatbare afwyking? van die?oppervlakteprofiel?vanaf 'n perfekte parabolo?ed?is 'n wortel-gemiddeld kwadraat fout van die orde van 1/12 golflengte, of 25 mm. Jy moet nou al die boumateriaal hiervoor van die aarde af lanseer in 'n geosinkrone wentelbaan.
Die 10 km deursnit antenne op aarde moet dieselfde akkuraatheid handhaaf om die golwe koherent te kan sommeer.


Dit word 'n baie baie vinnig 'n baie? duur speletjie!

On Mon, Oct 7, 2024 at 12:12?PM Wolhuter, Riaan, Dr [wolhuter@...] via <wolhuter=[email protected]> wrote:

Die kwadratiese verswakking met beide afstand en frekwenie oor 36000 km is baie hoog

?

From: [email protected] <[email protected]> On Behalf Of bernhard via
Sent: Monday, 07 October 2024 11:59
To: [email protected]
Subject: Re: [ZA-energie] Ruimtekrag

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Ja.? Geostasionere baan is baie ver, wat logistiek duur maak, en mikrogolwe wyd laat sprei, sodat dit nie op klein- of medium skaal bedryf kan word nie.? Maar ek sou graag die artikel wou sien!

On 2024/10/07 10:36, Wolhuter, Riaan, Dr [wolhuter@...] via wrote:

Stem heeltemal saam met daardie siening.

?

From: [email protected] <[email protected]> On Behalf Of Pieter Van der Walt via
Sent: Monday, 07 October 2024 10:02
To: ZA_energie <[email protected]>
Subject: Re: [ZA-energie] Ruimtekrag

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Hi Bernhard

Dit wys by my 'n prentjie. Dit is 'n redakteursnota vir 'n artikel in IEEE Spectrum wat bevestig dat 'n ruimtekragstasie wat mikrogolfdrywing na die aarde straal glad nie haalbaar is itv koste, tegniese en logistieke uirdagings nie.

?

On Sun, 06 Oct 2024, 20:37 bernhard via , <bernhard=[email protected]> wrote:

Die skakel hieronder wil nie oopmaak nie!

On 2024/10/06 19:31, Pieter Van der Walt wrote:

Ek stem heelhartig saam.

The integrity and confidentiality of this email are governed by these terms.
Die integriteit en vertroulikheid van hierdie e-pos word deur die volgende bepalings bere?l.


Re: Ruimtekrag

 

¿ªÔÆÌåÓý

Die kwadratiese verswakking met beide afstand en frekwenie oor 36000 km is baie hoog

?

From: [email protected] <[email protected]> On Behalf Of bernhard via groups.io
Sent: Monday, 07 October 2024 11:59
To: [email protected]
Subject: Re: [ZA-energie] Ruimtekrag

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Ja.? Geostasionere baan is baie ver, wat logistiek duur maak, en mikrogolwe wyd laat sprei, sodat dit nie op klein- of medium skaal bedryf kan word nie.? Maar ek sou graag die artikel wou sien!

On 2024/10/07 10:36, Wolhuter, Riaan, Dr [wolhuter@...] via groups.io wrote:

Stem heeltemal saam met daardie siening.

?

From: [email protected] <[email protected]> On Behalf Of Pieter Van der Walt via groups.io
Sent: Monday, 07 October 2024 10:02
To: ZA_energie <[email protected]>
Subject: Re: [ZA-energie] Ruimtekrag

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Hi Bernhard

Dit wys by my 'n prentjie. Dit is 'n redakteursnota vir 'n artikel in IEEE Spectrum wat bevestig dat 'n ruimtekragstasie wat mikrogolfdrywing na die aarde straal glad nie haalbaar is itv koste, tegniese en logistieke uirdagings nie.

?

On Sun, 06 Oct 2024, 20:37 bernhard via , <bernhard=[email protected]> wrote:

Die skakel hieronder wil nie oopmaak nie!

On 2024/10/06 19:31, Pieter Van der Walt wrote:

Ek stem heelhartig saam.

The integrity and confidentiality of this email are governed by these terms.
Die integriteit en vertroulikheid van hierdie e-pos word deur die volgende bepalings bere?l.


Re: Ruimtekrag

 

¿ªÔÆÌåÓý

Ja.? Geostasionere baan is baie ver, wat logistiek duur maak, en mikrogolwe wyd laat sprei, sodat dit nie op klein- of medium skaal bedryf kan word nie.? Maar ek sou graag die artikel wou sien!

On 2024/10/07 10:36, Wolhuter, Riaan, Dr [wolhuter@...] via groups.io wrote:

Stem heeltemal saam met daardie siening.

?

From: [email protected] <[email protected]> On Behalf Of Pieter Van der Walt via groups.io
Sent: Monday, 07 October 2024 10:02
To: ZA_energie <[email protected]>
Subject: Re: [ZA-energie] Ruimtekrag

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Hi Bernhard

Dit wys by my 'n prentjie. Dit is 'n redakteursnota vir 'n artikel in IEEE Spectrum wat bevestig dat 'n ruimtekragstasie wat mikrogolfdrywing na die aarde straal glad nie haalbaar is itv koste, tegniese en logistieke uirdagings nie.

?

On Sun, 06 Oct 2024, 20:37 bernhard via , <bernhard=[email protected]> wrote:

Die skakel hieronder wil nie oopmaak nie!

On 2024/10/06 19:31, Pieter Van der Walt wrote:

Ek stem heelhartig saam.

The integrity and confidentiality of this email are governed by these terms.
Die integriteit en vertroulikheid van hierdie e-pos word deur die volgende bepalings bere?l.


Re: Ruimtekrag

 

¿ªÔÆÌåÓý

Stem heeltemal saam met daardie siening.

?

From: [email protected] <[email protected]> On Behalf Of Pieter Van der Walt via groups.io
Sent: Monday, 07 October 2024 10:02
To: ZA_energie <[email protected]>
Subject: Re: [ZA-energie] Ruimtekrag

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Hi Bernhard

Dit wys by my 'n prentjie. Dit is 'n redakteursnota vir 'n artikel in IEEE Spectrum wat bevestig dat 'n ruimtekragstasie wat mikrogolfdrywing na die aarde straal glad nie haalbaar is itv koste, tegniese en logistieke uirdagings nie.

?

On Sun, 06 Oct 2024, 20:37 bernhard via , <bernhard=[email protected]> wrote:

Die skakel hieronder wil nie oopmaak nie!

On 2024/10/06 19:31, Pieter Van der Walt wrote:

Ek stem heelhartig saam.

The integrity and confidentiality of this email are governed by these terms.
Die integriteit en vertroulikheid van hierdie e-pos word deur die volgende bepalings bere?l.


Re: Ruimtekrag

 

Hi Bernhard
Dit wys by my 'n prentjie. Dit is 'n redakteursnota vir 'n artikel in IEEE Spectrum wat bevestig dat 'n ruimtekragstasie wat mikrogolfdrywing na die aarde straal glad nie haalbaar is itv koste, tegniese en logistieke uirdagings nie.

On Sun, 06 Oct 2024, 20:37 bernhard via , <bernhard=[email protected]> wrote:

Die skakel hieronder wil nie oopmaak nie!

On 2024/10/06 19:31, Pieter Van der Walt wrote:
Ek stem heelhartig saam.


Re: Ruimtekrag

 

¿ªÔÆÌåÓý

Die skakel hieronder wil nie oopmaak nie!

On 2024/10/06 19:31, Pieter Van der Walt wrote:

Ek stem heelhartig saam.
image.png


Ruimtekrag

 

Ek stem heelhartig saam.
image.png


BBC Onderhoud oor SA Kernwapenprogram

 

¿ªÔÆÌåÓý

Subject: BBC Witness History onderhoud
Date: Wed, 2 Oct 2024 21:04:08 +0200
From: Andre Buys <ajbuys@...>
To: Andre Buys <ajbuys@...>

Liewe familie en vriende,

Ek het onlangs 'n onderhoud gehad met die joernalis Gill Kearsley wat vir 'n BBC-radioprogram genaamd Witness History op die BBC se World Service werk. Soos die naam aandui, is Witness History 'n eerstepersoonsverslag uit 'n oomblik in die geskiedenis. Sy het 'n onderhoud met my gevoer oor my betrokkenheid by Suid-Afrika se kernwapenprogram. Die program wat sy opgeneem het, is beskikbaar by .

Groete en beste wense

?Andr¨¦ Buys


Virus-free.


Re: Editorial highlights: AI hype, pandemic history, and more

 

¿ªÔÆÌåÓý

Nogal insiggewend hoe dikwels epidemies deur oorlo? bevorder word.
Vriendelike groete
Dieter?
Tel ?012 371 3389
Sel 083 287 3220
Posbus 58?
Hartbeespoort
0216 Suid-Afrika








On 26 Sep 2024, at 22:27, Wolhuter, Riaan, Dr [wolhuter@...] via <wolhuter@...> wrote:

Nog net die artikel oor die epidemies gelees. Baie interessant, maar nie vrolike leesstof nie!
?
From:?[email protected]?<[email protected]>?On Behalf Of?Pieter Van der Walt via?
Sent:?Thursday, 26 September 2024 21:33
To:?ZA_energie <[email protected]>
Subject:?[ZA-energie] Editorial highlights: AI hype, pandemic history, and more
?
CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.
?
Die atoomwetenskaplikes se webwerf is 'n interessante en insiggewende kuierplek met baie inligting.
PW

?

---------- Forwarded message ---------
From:?Bulletin of the Atomic Scientists?<newsletter@...>
Date: Thu, 26 Sept 2024, 15:31
Subject: Editorial highlights: AI hype, pandemic history, and more
To: <pwvanderwalt@...>

?

Nuclear questions for US presidential candidates | More?

Read a shareable version of this newsletter?.
Was this email forwarded to you???to stay current.
?
?
?
? September 26, 2024
?
Illustration by Erik English under license from vectoratu / Denis Voronin?
?
Bulletin?editorial highlights

This week, the?Bulletin?is holding strategic planning meetings. While we reflect on the past and look forward to the future, we wanted to share some of our favorite articles. Stay tuned for more highlights in Monday's newsletter.

JOHN MECKLIN

For the?Bulletin's?July 2023 Magazine, editor-in-chief John Mecklin went to Hollywood and interviewed Christopher Nolan about his then-upcoming film,?Oppenheimer.?

ERIK ENGLISH

Human history?is riddled with grizzly stories of epidemics.?Bulletin?associate multimedia editor Erik English took a visual approach to the history of human epidemics in this illustrated timeline.?

FRAN?OIS DIAZ-MAURIN

The?Bulletin's nuclear affairs?editor, Fran?ois Diaz-Maurin, wrote a guide on what to expect during, and after, a nuclear war. The results aren't pretty.?

SARA GOUDARZI

Bulletin?disruptive technologies editor Sara Goudarzi wrote an article differentiating?chatbots from?AI as a whole,?showing that a better understanding of how they work (and the human labor and data involved)?can better help evaluate?concerns about them.?

?
?
?
?
?
On November 12th, theBulletin¡¯s annual gathering will be held in Chicago.??

Occurring one week after the US election, our keynote conversation will feature David Ignatius, award-winningWashington Post?columnist whose new book?Phantom Orbit?focuses on growing conflicts in space.

???
?
?
?
?

?

FRAN?OIS DIAZ-MAURIN, JOHN MECKLIN

The?Bulletin?asked nuclear policy experts to suggest questions that journalists and citizens should ask the 2024 presidential candidates. Read more of the submissions below, and stay tuned for further entries.

TOM Z. COLLINA

Tom Z. Collina, a national security expert and former director of policy at the Ploughshares Fund, proposes a single, central question about nuclear weapons that journalists and citizens should ask the 2024 presidential candidates.?

ELIANA JOHNS

Eliana Johns, senior research associate at the Federation of American Scientists and co-author of the?Bulletin¡¯s Nuclear Notebook, proposes four nuclear questions about the US arsenal, nuclear testing, use of nuclear weapons, and North Korea that journalists and citizens should ask the 2024 presidential candidates.?

QUOTE OF THE DAY
????
"The US showed at Vogtle that we¡¯re not very good at building [nuclear]?plants...¡±

¡ª Todd Allen, chair of nuclear engineering and radiological sciences at University of Michigan,??Wired
?
?
?
Your gift fuels our mission to educate and empower. Together we will work to ensure science serves humanity.
?
?
?
?
?
?
?? ? ?? ? ?? ? ?? ? ??
?
Copyright ? 2024?Bulletin of the Atomic Scientists
All Rights Reserved | Email:?newsletter@...

Bulletin of the Atomic Scientists

Don't miss an email! Please add?newsletter@...?to your address book.
?

?
?

The integrity and confidentiality of this email are governed by these terms.?
Die integriteit en vertroulikheid van hierdie e-pos word deur die volgende bepalings bere?l.?


Re: Editorial highlights: AI hype, pandemic history, and more

 

'n Ander interessante webwerrf is , federation of American Scintists.


On Thu, 26 Sept 2024, 21:32 Pieter Van der Walt via , <pwvanderwalt=[email protected]> wrote:
Die atoomwetenskaplikes se webwerf is 'n interessante en insiggewende kuierplek met baie inligting.
PW
?

---------- Forwarded message ---------
From: Bulletin of the Atomic Scientists <newsletter@...>
Date: Thu, 26 Sept 2024, 15:31
Subject: Editorial highlights: AI hype, pandemic history, and more
To: <pwvanderwalt@...>


Nuclear questions for US presidential candidates | More

Read a shareable version of this newsletter?.
Was this email forwarded to you?? to stay current.

? September 26, 2024
?
Illustration by Erik English under license from vectoratu / Denis Voronin?

Bulletin editorial highlights

This week, the Bulletin is holding strategic planning meetings. While we reflect on the past and look forward to the future, we wanted to share some of our favorite articles. Stay tuned for more highlights in Monday's newsletter.

JOHN MECKLIN

For the Bulletin's?July 2023 Magazine, editor-in-chief John Mecklin went to Hollywood and interviewed Christopher Nolan about his then-upcoming film, Oppenheimer.?

ERIK ENGLISH

Human history?is riddled with grizzly stories of epidemics. Bulletin?associate multimedia editor Erik English took a visual approach to the history of human epidemics in this illustrated timeline.?

FRAN?OIS DIAZ-MAURIN

The Bulletin's nuclear affairs?editor, Fran?ois Diaz-Maurin, wrote a guide on what to expect during, and after, a nuclear war. The results aren't pretty.?

SARA GOUDARZI

Bulletin disruptive technologies editor Sara Goudarzi wrote an article differentiating?chatbots from?AI as a whole,?showing that a better understanding of how they work (and the human labor and data involved)?can better help evaluate?concerns about them.?

?
?

?

On November 12th, the Bulletin¡¯s annual gathering will be held in Chicago.??

Occurring one week after the US election, our keynote conversation will feature David Ignatius, award-winning Washington Post columnist whose new book Phantom Orbit focuses on growing conflicts in space.

???

?
?
?
?

FRAN?OIS DIAZ-MAURIN, JOHN MECKLIN

The Bulletin asked nuclear policy experts to suggest questions that journalists and citizens should ask the 2024 presidential candidates. Read more of the submissions below, and stay tuned for further entries.

TOM Z. COLLINA

Tom Z. Collina, a national security expert and former director of policy at the Ploughshares Fund, proposes a single, central question about nuclear weapons that journalists and citizens should ask the 2024 presidential candidates.?

ELIANA JOHNS

Eliana Johns, senior research associate at the Federation of American Scientists and co-author of the Bulletin¡¯s Nuclear Notebook, proposes four nuclear questions about the US arsenal, nuclear testing, use of nuclear weapons, and North Korea that journalists and citizens should ask the 2024 presidential candidates.?

QUOTE OF THE DAY
????
"The US showed at Vogtle that we¡¯re not very good at building [nuclear]?plants...¡±

¡ª Todd Allen, chair of nuclear engineering and radiological sciences at University of Michigan,??Wired

?
?

Your gift fuels our mission to educate and empower. Together we will work to ensure science serves humanity.
?

?
?
?

?? ? ?? ? ?? ? ?? ? ??
?

Copyright ? 2024?Bulletin of the Atomic Scientists

All Rights Reserved | Email: newsletter@...

Bulletin of the Atomic Scientists

Don't miss an email! Please add newsletter@... to your address book.
?

?


Re: Editorial highlights: AI hype, pandemic history, and more

 

¿ªÔÆÌåÓý

Nog net die artikel oor die epidemies gelees. Baie interessant, maar nie vrolike leesstof nie!

?

From: [email protected] <[email protected]> On Behalf Of Pieter Van der Walt via groups.io
Sent: Thursday, 26 September 2024 21:33
To: ZA_energie <[email protected]>
Subject: [ZA-energie] Editorial highlights: AI hype, pandemic history, and more

?

CAUTION: This email originated from outside the Stellenbosch University network. Do not click links or open attachments unless you recognize the sender and know the content is safe.

?

Die atoomwetenskaplikes se webwerf is 'n interessante en insiggewende kuierplek met baie inligting.

PW

?

---------- Forwarded message ---------
From: Bulletin of the Atomic Scientists <newsletter@...>
Date: Thu, 26 Sept 2024, 15:31
Subject: Editorial highlights: AI hype, pandemic history, and more
To: <pwvanderwalt@...>

?

Nuclear questions for US presidential candidates | More

Read a shareable version of this newsletter?.
Was this email forwarded to you?? to stay current.

?

?

?

? September 26, 2024
?

Illustration by Erik English under license from vectoratu / Denis Voronin?

?

Bulletin editorial highlights

This week, the Bulletin is holding strategic planning meetings. While we reflect on the past and look forward to the future, we wanted to share some of our favorite articles. Stay tuned for more highlights in Monday's newsletter.

JOHN MECKLIN

For the Bulletin's?July 2023 Magazine, editor-in-chief John Mecklin went to Hollywood and interviewed Christopher Nolan about his then-upcoming film, Oppenheimer.?

ERIK ENGLISH

Human history?is riddled with grizzly stories of epidemics. Bulletin?associate multimedia editor Erik English took a visual approach to the history of human epidemics in this illustrated timeline.?

FRAN?OIS DIAZ-MAURIN

The Bulletin's nuclear affairs?editor, Fran?ois Diaz-Maurin, wrote a guide on what to expect during, and after, a nuclear war. The results aren't pretty.?

SARA GOUDARZI

Bulletin disruptive technologies editor Sara Goudarzi wrote an article differentiating?chatbots from?AI as a whole,?showing that a better understanding of how they work (and the human labor and data involved)?can better help evaluate?concerns about them.?

?

?

?

?

?

?

?

On November 12th, the Bulletin¡¯s annual gathering will be held in Chicago.??

Occurring one week after the US election, our keynote conversation will feature David Ignatius, award-winning Washington Post columnist whose new book Phantom Orbit focuses on growing conflicts in space.

???

?

?

?

?

?

?

?

?

FRAN?OIS DIAZ-MAURIN, JOHN MECKLIN

The Bulletin asked nuclear policy experts to suggest questions that journalists and citizens should ask the 2024 presidential candidates. Read more of the submissions below, and stay tuned for further entries.

TOM Z. COLLINA

Tom Z. Collina, a national security expert and former director of policy at the Ploughshares Fund, proposes a single, central question about nuclear weapons that journalists and citizens should ask the 2024 presidential candidates.?

ELIANA JOHNS

Eliana Johns, senior research associate at the Federation of American Scientists and co-author of the Bulletin¡¯s Nuclear Notebook, proposes four nuclear questions about the US arsenal, nuclear testing, use of nuclear weapons, and North Korea that journalists and citizens should ask the 2024 presidential candidates.?

QUOTE OF THE DAY
????
"The US showed at Vogtle that we¡¯re not very good at building [nuclear]?plants...¡±

¡ª Todd Allen, chair of nuclear engineering and radiological sciences at University of Michigan,??Wired

?

?

?

Your gift fuels our mission to educate and empower. Together we will work to ensure science serves humanity.
?

?

?

?

?

?

?? ? ?? ? ?? ? ?? ? ??
?

Copyright ? 2024?Bulletin of the Atomic Scientists

All Rights Reserved | Email: newsletter@...

Bulletin of the Atomic Scientists

Don't miss an email! Please add newsletter@... to your address book.
?

?

?

?

?

The integrity and confidentiality of this email are governed by these terms.
Die integriteit en vertroulikheid van hierdie e-pos word deur die volgende bepalings bere?l.


Editorial highlights: AI hype, pandemic history, and more

 

Die atoomwetenskaplikes se webwerf is 'n interessante en insiggewende kuierplek met baie inligting.
PW
?

---------- Forwarded message ---------
From: Bulletin of the Atomic Scientists <newsletter@...>
Date: Thu, 26 Sept 2024, 15:31
Subject: Editorial highlights: AI hype, pandemic history, and more
To: <pwvanderwalt@...>


Nuclear questions for US presidential candidates | More

Read a shareable version of this newsletter?.
Was this email forwarded to you?? to stay current.

? September 26, 2024
?
Illustration by Erik English under license from vectoratu / Denis Voronin?

Bulletin editorial highlights

This week, the Bulletin is holding strategic planning meetings. While we reflect on the past and look forward to the future, we wanted to share some of our favorite articles. Stay tuned for more highlights in Monday's newsletter.

JOHN MECKLIN

For the Bulletin's?July 2023 Magazine, editor-in-chief John Mecklin went to Hollywood and interviewed Christopher Nolan about his then-upcoming film, Oppenheimer.?

ERIK ENGLISH

Human history?is riddled with grizzly stories of epidemics. Bulletin?associate multimedia editor Erik English took a visual approach to the history of human epidemics in this illustrated timeline.?

FRAN?OIS DIAZ-MAURIN

The Bulletin's nuclear affairs?editor, Fran?ois Diaz-Maurin, wrote a guide on what to expect during, and after, a nuclear war. The results aren't pretty.?

SARA GOUDARZI

Bulletin disruptive technologies editor Sara Goudarzi wrote an article differentiating?chatbots from?AI as a whole,?showing that a better understanding of how they work (and the human labor and data involved)?can better help evaluate?concerns about them.?

?
?

?

On November 12th, the Bulletin¡¯s annual gathering will be held in Chicago.??

Occurring one week after the US election, our keynote conversation will feature David Ignatius, award-winning Washington Post columnist whose new book Phantom Orbit focuses on growing conflicts in space.

???

?
?
?
?

FRAN?OIS DIAZ-MAURIN, JOHN MECKLIN

The Bulletin asked nuclear policy experts to suggest questions that journalists and citizens should ask the 2024 presidential candidates. Read more of the submissions below, and stay tuned for further entries.

TOM Z. COLLINA

Tom Z. Collina, a national security expert and former director of policy at the Ploughshares Fund, proposes a single, central question about nuclear weapons that journalists and citizens should ask the 2024 presidential candidates.?

ELIANA JOHNS

Eliana Johns, senior research associate at the Federation of American Scientists and co-author of the Bulletin¡¯s Nuclear Notebook, proposes four nuclear questions about the US arsenal, nuclear testing, use of nuclear weapons, and North Korea that journalists and citizens should ask the 2024 presidential candidates.?

QUOTE OF THE DAY
????
"The US showed at Vogtle that we¡¯re not very good at building [nuclear]?plants...¡±

¡ª Todd Allen, chair of nuclear engineering and radiological sciences at University of Michigan,??Wired

?
?

Your gift fuels our mission to educate and empower. Together we will work to ensure science serves humanity.
?

?
?
?

?? ? ?? ? ?? ? ?? ? ??
?

Copyright ? 2024?Bulletin of the Atomic Scientists

All Rights Reserved | Email: newsletter@...

Bulletin of the Atomic Scientists

Don't miss an email! Please add newsletter@... to your address book.
?

?