Results 121 to 130 of about 8,678 (302)

Mass comparisons of electric propulsion systems for NSSK of geosynchronous spacecraft [PDF]

A model was developed and exercised to allow wet mass comparisons of three axis stabilized communication satellites delivered to geosynchronous transfer orbit.
Majcher, Gregory A., Rawlin, Vincent K.
core   +1 more source

‘It's all very well having a diverse curriculum, but if there is no curriculum, it can be as diverse as you like’: Precarity and decolonising in the neoliberal UK higher education system

British Educational Research Journal, EarlyView.
Abstract Drawing upon interview research across two academic departments as part of the early stages of a ‘decolonise the curriculum’ initiative at a Southern UK university, this study highlights a growing gulf between policy and practice in efforts to address systemic racial inequalities in UK universities. A reliance upon precarious labour, a culture
Triona Fitton, Barbara Adewumi, Laura R. Bailey, Jacob W. Moore, Lauren‐Marie Aba Amoah   +4 more
wiley   +1 more source

Expanded Thruster Mass Model Incorporating Nested Hall Thrusters [PDF]

53rd AIAA/SAE/ASEE Joint Propulsion Conference, 2017
Scott J. Hall, Benjamin Jorns, Alec Gallimore, Richard R. Hofer   +3 more
openaire   +1 more source

Electrothermal oscillations and the quasilinear theory of electron enthalpy fluctuations in magnetohydrodynamic generators and magnetoplasmadynamic arc thrusters [PDF]

Flucturations in electron density and temperature coupled through OHM's Law are studied for MHD power generator and MPD arc thruster applications.
Smith, J. M.
core   +1 more source

Pulse-width predictive control for LTV systems with application to spacecraft rendezvous [PDF]

, 2017
This work presents a Model Predictive Controller (MPC) that is able to handle Linear Time-Varying (LTV) plants with Pulse-Width Modulated (PWM) control.
Camacho, Eduardo F., Gavilán Jiménez, Francisco, Vázquez Valenzuela, Rafael   +2 more
core  

The impact of the current student loans regime on Muslim student engagement and retention in English higher education

British Educational Research Journal, EarlyView.
Abstract There is much interest in the potential for an alternative funding system for higher education students in England to support the spiritual and worldly needs of British Muslim students. At the heart of this issue lies a tension over whether the student financing system in English HE is haram, or forbidden under Islamic (Shari'ah) law, because ...
Richard Hall, Yusraa Maryam, Sumeya Loonat   +2 more
wiley   +1 more source

Compromise kinetic-fluid model of electrons dynamics in electric propulsion devices with closed electrons drift as an alternative to the hybrid PIC-Fluid method

Авіаційно-космічна техніка та технологія
Electric propulsion devices with closed electron drift include Hall effect thrusters, plasma-ion thrusters with a radial magnetic field, and helicon thrusters, which are sources of plasma, ions, and electrons. Within the framework of the hybrid PIC-Fluid
Serhii Nesterenko, Huang Zhihao, Shahram Roshanpour   +2 more
doaj   +1 more source

Closed-drift thruster investigations [PDF]

Recent data obtained from a second generation closed-drift thruster design, employing Hall current acceleration is outlined. This type device is emphasized for electric propulsion for geocentric mission applications.
Patterson, Michael J., Robinson, Raymond S., Schemmel, Terry D.   +2 more
core   +1 more source

Halide perovskites in wide‐spectrum photodetection

Bulletin of the Korean Chemical Society, EarlyView.
Recent advances in perovskite‐based photodetectors (PPDs), phototransistors, and photoconductors are technically discussed in this review. Moreover, the mechanism behind different harvesting processes in perovskite following the energy of photons is explained, where the gamma or x‐rays are ionizing.
Somayeh Gholipour, Reza Rahighi, Mohammad Panahi, Muhammad Naufal Lintangpradipto, Reza Ghayoor, Michael Saliba   +5 more
wiley   +1 more source

Test Facility and Preliminary Performance of a 100 kW Class MPD Thruster [PDF]

A 260 kW magnetoplasmadynamic (MPD) thruster test facility was assembled and used to characterize thrusters at power levels up to 130 kW using argon and helium propellants.
Haag, Thomas W., Mantenieks, M. A., Parkes, J. E., Raitano, P., Sovey, J. S.   +4 more
core   +1 more source