Justifying the need for electric propulsion in interplanetary missions (Presentation)

Herafter the slides of my very first paper about electric propulsion that I made for the 1st Congreso Argentino de Tecnologia Espacial (Buenos Aires, october 2000).

Justifying the need for electric propulsion in interplanetary missions

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Analytical Model for Performance Evaluation of Ablative Plasma Pulsed Thruster

This analytical model was created for a future version of micro-satellite µsat (also known as Victor) which was developed and built by the Centro de Investigaciones Aplicadas (IUA) in Argentina. Victor was launched on 29 August 1996 by Molniya-M from Plesetsk.

The model allows to make a quick evaluation of Ablative Pulsed Plasma Thrusters (APPT) performances for preliminary design purposes. It works very well for capacitors delivering low energies and for APPT coaxial geometries.

The paper hereafter presents the very first results. An improved version of this paper giving better predictions was published on Journal of Propulsion of Power (year 2004, vol. 20, n°6, pages 970 to 977) available on http://www.aiaa.org.

Analytical Model for Performance Evaluation of Ablative Plasma Pulsed Thruster

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Feuille Autocollants Lego Star Wars

Petite feuille d'autocollants collector. Celle-ci numérotée 16353 (sur 20000 exemplaires).

Au verso on retrouve les sets Lego Star Wars à venir cet été. Quelques sets sont désormais disponibles dans des Lego Web Shop non officiels :

8089 Hoth Wampa Cave

8095 General Grievous' Starfighter

8096 Emperor Palpatine's Shuttle

8097 Slave 1

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The National - "Bloodbuzz Ohio"

Maybe the band of the year...

The National - "Bloodbuzz Ohio" (official video)

Posted via web from El Filtro

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Free Comic Book Day : My selection

Hereafter the 6 comics that I picked yesterday :

- War of the Supermen
- Irredeemable / Incorruptible
- Overstreet, Guide to Collecting Comics
- Iron Man & Nova
- Iron Man & Thor
- Fearless Dawn

Click on images to enlarge.

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HTDA : How To Destroy Angels

First appearance of Trent Reznor since the end of Nine Inch Nails in the very new band "How To Destroy Angels". There's no much information about this band. Pitchfork indicates that "How To Destroy Angels" is Reznor's collaboration with his wife Mariqueen Maandig. The first single, "A Drowning" reminds us very well the typical sound and musical style of Nine Inch Nails (in fact, this song was mixed by Alan Moulder, who has worked with Nine Inch Nails in the past). The female voice of Mariqueen (formerly of West Indian Girl) gives a new freshness. This summer HTDA will release a 6-song debut EP... Wait and see...

Some videos about probably sequences and loops which we will found on the upcoming EP are available at http://howtodestroyangels.com

Download now or listen on posterous

htda-drowning.mp3 (17816 KB)

Posted via web from Sotreta's Box

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Star Wars : Promo chez Lego

Pendant deux jours, lundi 3 mai et mardi 4 mai, le site de Lego lance une offre spéciale Star Wars. Les modalités de cette offre :

- Frais de livraison gratuite à partir de 55 euros d'achat dans la gamme Star Wars.
- Une feuille d'autocollants Lego Star Wars offerte pour tout achat d'un ensemble Lego Star Wars effectué le 3 ou 4 mai (hors ensembles à prix réduit). Valeur estimée de la feuille = 0.40 euros... sans blague !! Elle a été tirée à 20000 exemplaires seulement !!

Cliquez sur l'image pour accéder à la boutique Lego Star Wars.

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