Review of intelligent wheelchair technology control development in the last 12 years

Author(s):  
Cindy Wahyufitriyani ◽  
Susy Susmartini ◽  
Ilham Priadythama
2019 ◽  
Author(s):  
Ika Riswanti Putranti ◽  
Ajie Mahar Muhammad

Indonesia, sebagai negara yang sedang memulai pengembangan teknologi keantariksaan salah satunya roket, menghadapi beberapa kendala. Didasarkan pada beberapa kajian strategis terkait isu ini, kesulitan Indonesia adalah terkait dengan alih teknologi. Sebagai negara non-anggota Missile Technology Control Regime (MTCR), hambatan tersebut dapat diatasi melalui upaya kerja sama dengan negara-negara yang mempunyai posisi sama dengan Indonesia, yaitu non-anggota MTCR yang sudah mempunyai pengembangan teknologi keantariksaan khususnya roket. Dalam upaya menjalin kerja sama tersebut, Indonesia juga harus mempertimbangkan beberapa hal terkait calon negara mitra kerja sama. Hal tersebut penting karena kerja sama teknologi keantariksaan, terutama dalam teknologi roket yang mempunyai fungsi ganda, merupakan hal yang sangat sensitif bagi keamanan suatu negara. Beberapa hal yang dimaksud adalah orientasi kebijakan dan politik luar negeri calon negara mitra terkait dengan teknologi antariksa, rezim alih teknolgi yang dianut oleh calon negara mitra, pengembangan industri keantariksaan, posisi calon negara mitra terhadap rezim MTCR, hubungan calon negara mitra dengan negara-negara yang menguasai teknologi antariksa, dan bagaimana posisi calon negara mitra terhadap beberapa perjanjian yang terkait dengan penggunaan roket. Menimbang orientasi kebijakan dan politik luar negeri calon negara mitra merupakan hal yang penting guna menentukan arah kerja sama yang berkelanjutan dan berkesinambungan sehingga dapat menghasilkan kerja sama yang saling menguntungkan.


2021 ◽  
Vol 1797 (1) ◽  
pp. 012019
Author(s):  
Sudarshan Nath ◽  
Sourav Debnath ◽  
Nilay Mukherjee ◽  
Swagata Mukherjee ◽  
Amaresh Chakraborty ◽  
...  

2011 ◽  
Vol 64 (11) ◽  
pp. 1522 ◽  
Author(s):  
Manuela Oliverio ◽  
Antonio Procopio ◽  
Toma N. Glasnov ◽  
Walter Goessler ◽  
C. Oliver Kappe

Finding environmentally gentle methods to graft Lewis acid on the surface of mesoporous materials is a topic of current interest. Herein we describe the optimization of a preparation procedure of a mesoporous silica-supported ErIII catalyst using the microwave-assisted post-calcination functionalization of Mobil Composition of Matter-41 silica as the key step. The required time for functionalization was reduced from several hours to 10 min using sealed-vessel microwave technology. Control experiments using conventional heating at the same temperature demonstrated that the rate increase is owing to a simple thermal/kinetic effect as a result of the higher reaction temperature. The resulting ErIII catalyst was tested for the first time as a catalyst in the continuous flow deprotection of benzaldehyde dimethylacetal and a complete leaching study was performed.


2016 ◽  
Vol 25 (2) ◽  
pp. 107-121 ◽  
Author(s):  
Malek Njah ◽  
Mohamed Jallouli

AbstractThe electric wheelchair gives more autonomy and facilitates movement for handicapped persons in the home or in a hospital. Among the problems faced by these persons are collision with obstacles, the doorway, the navigation in a hallway, and reaching the desired place. These problems are due to the difficult manipulation of an electric wheelchair, especially for persons with severe disabilities. Hence, we tried to add more functionality to the standard wheelchair in order to increase movement range, security, environment access, and comfort. In this context, we have developed an automatic control method for indoor navigation. The proposed control system is mounted on the electric wheelchair for the handicapped, developed in the research laboratory CEMLab (Control and Energy Management Laboratory-Tunisia). The proposed method is based on two fuzzy controllers that ensure target achievement and obstacle avoidance. Furthermore, an extended Kalman filter was used to provide precise measurements and more effective data fusion localization. In this paper, we present the simulation and experimental results of the wheelchair navigation system.


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