Low-Cost Small-Satellite Delivery System

2002 ◽  
Vol 39 (5) ◽  
pp. 818-820 ◽  
Author(s):  
Frederick W. Boltz
Author(s):  
Devina Cristine Marubin ◽  
◽  
Sim Sy Yi ◽  

Can-Sized satellite (canSAT) is a small satellite that is used for educational purpose. CanSAT offer student to build their satellites with their creativity which make the learning process more effective. In Malaysia, SiswaSAT is held by the Malaysia Space Agency for students in different categories to participate and build their satellites according to rules set and it should be a low-cost project. CanSAT can be divided into few parts which are communication system, onboard data acquisition, ground control station and power system. The power system is one of the important and heaviest subsystems, it needed to supply power, but weight and size are one of the main concerned as the canSAT should not exceed the required weight and selecting power supply that is matched with the overall power budget that has small size and lightweight is challenging. Therefore, the power supply selection should consider this detail. The power distribution design should be able to supply an appropriate amount of current and voltage to the components according to their specification. This study aims to develop and test the proposed prototype which is named ScoreSAT able to provide data and have enough power supply for the whole operation. Therefore, an initiative to develop the appropriate power distribution design for canSAT is taken to overcome the problem of the power system. Moreover, each subsystem needs to be tested by obtaining the results from the onboard data acquisition and transmit the data using the communication system before integrating into the power system. ScoreSAT prototype needs to carry the system that is mounted inside, thus the space inside the prototype needs to be fully utilized for the whole system to fit in. ScoreSAT completes the mission by obtaining data acquisition during the operation.


2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Shi Zeng ◽  
Fengbo Wu ◽  
Bo Li ◽  
Xiangrong Song ◽  
Yu Zheng ◽  
...  

An amphiphilic polymer RGD-PEG-Chol which can be produced in large scale at a very low cost has been synthesized successfully. The synthesized intermediates and final products were characterized and confirmed by1H nuclear magnetic resonance spectrum (1H NMR) and Fourier transform infrared spectrum (FT-IR). The paclitaxel- (PTX-) loaded liposomes based on RGD-PEG-Chol were then prepared by film formation method. The liposomes had a size within 100 nm and significantly enhanced the cytotoxicity of paclitaxel to B16F10 cell as demonstrated by MTT test (IC50= 0.079 μg/mL of RGD-modified PTX-loaded liposomes compared to 9.57 μg/mL of free PTX). Flow cytometry analysis revealed that the cellular uptake of coumarin encapsulated in the RGD-PEG-Chol modified liposome was increased for HUVEC cells. This work provides a reasonable, facile, and economic approach to prepare peptide-modified liposome materials with controllable performances and the obtained linear RGD-modified PTX-loaded liposomes might be attractive as a drug delivery system.


1978 ◽  
Vol 13 (1) ◽  
pp. 29-35 ◽  
Author(s):  
C. E. Climent ◽  
M. V. Arango ◽  
R. Plutchik ◽  
C. A. Le�n

2019 ◽  
Vol 311 ◽  
pp. 1-12 ◽  
Author(s):  
Antonietta Canna ◽  
Anna Prinster ◽  
Michele Fratello ◽  
Luca Puglia ◽  
Mario Magliulo ◽  
...  

2018 ◽  
Vol 202 ◽  
pp. 409-417 ◽  
Author(s):  
J.J. Perez ◽  
N.J. Francois ◽  
G.A. Maroniche ◽  
M.P. Borrajo ◽  
M.A. Pereyra ◽  
...  

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