Linear dynamic modeling of spacecraft with various flexible appendages and on-board angular momentums

We present here a method and some tools developed to build linear models of multi-body systems for space applications (typically satellites). The multi-body system is composed of a main body (hub) fitted with rigid and flexible appendages (solar panels, antennas, propellant tanks,...) and on-board angular momentums (flywheels, control moment gyros). Each appendage can be connected to the hub by a cantilever joint or a pivot joint. More generally, our method can be applied to any open mechanical chain. In our approach, the rigid six degrees of freedom (d.o.f) (three translational and three rotational) are treated all together. That is very convenient to build linear models of complex multi-body systems. Then, the dynamics model used to design AOCS, i.e. the model between forces and torques (applied on the hub) and angular and linear position and velocity of the hub, can be derived very easily. This model can be interpreted using block diagram representation

Analisis Pengaruh Kualitas Produk Dan Citra Merek Terhadap Minat Beli Produk Jok Mobil MB Tech Camaro Pada Toko Jaya Abadi

This study analyzes the quality of the products and brand image of the interest in buying the product MB Tech Camaro car seat in Stores Jaya Abadi. The aim of this research was to examine the effect of analyzing the quality of the products and brand image to the buying interest. The population in this study are all consumers who have or have ever bought and used the product MB Tech Camaro car seat. The population is spread out to all consumers in the store Jaya Abadi. The sampling technique used in this study is a non probability sampling. Hypothesis testing using multiple regression analysis with SPSS ver. 18.0. The test results indicate that the first hypothesis (H1) which states that the quality of the product (X1) influence on buying interest (Y), has been proven true. The second hypothesis (H2) which states that the image of the brand (X2) has no effect on buying interest (Y)

The Variances of Consumers’ Materialistic Personality Traits and Reduced Consumption Behavior Among Demographics in Egypt

Throughout the consumer behavior’s field, comprehending materialism across different countries has been of critical importance to transformative consumer research authors, marketers and policy makers. Materialism was discussed with its pros and cons in previous studies. However, present conflicting results exist across various contexts about its effects on socially responsible behavior. Nevertheless, the past studies included vast research on materialistic values, they embraced a limited research scope regarding the materialistic personality traits (MPT) and their influence on consumers’ sustainable behavior. This study tests the validity and reliability of Belk’s materialistic personality traits scale in Egypt, as one of the influential and mass consumer societies in the Arab region. It contributes towards understanding the influence of materialism as a personality trait on reduced consumption behavior and whether these dimensions vary among age, gender and place of residence. Large scale survey instrument was distributed across Egypt using quota non-random sampling which yielded 540 respondents. Plausible findings revealed significant effects of the materialistic personality traits on the reduced consumption behavior and indicated variances across the denoted demographics. This will help marketers and policy makers better describe and target the consumers’ materialistic personalities through designing effective communication that develops a pro-sustainable consumption behavior to bring about a change for a sustainable future. Keywords:Materialism; Belk materialism Scale; materialistic personality traits; pro-sustainable behavior; possessiveness; envy; non-generosity; reduced consumption behavior; demographics DOI: 10.7176/JMCR/88-02 Publication date: January 31st 202