Casting propellant in rocket engine

A method is described for casting a solid propellant in the casing of a rocket engine having a continuous wall with a single opening which is formed by leaves of a material which melt at a temperature of the propellant and with curved edges concentric to the curvature of the spherical casing. The leaves are inserted into the spherical casing through the opening forming a core having a greater width than the width of the single opening and with curved peripheral edges. The cast propellant forms a solid mass and then heated to melt the leaves and provide a central opening with radial projecting flutes

Manual therapy with and without vestibular rehabilitation for cervicogenic dizziness: a systematic review

<p>Abstract</p> <p>Background</p> <p>Manual therapy is an intervention commonly advocated in the management of dizziness of a suspected cervical origin. Vestibular rehabilitation exercises have been shown to be effective in the treatment of unilateral peripheral vestibular disorders, and have also been suggested in the literature as an adjunct in the treatment of cervicogenic dizziness. The purpose of this systematic review is to evaluate the evidence for manual therapy, in conjunction with or without vestibular rehabilitation, in the management of cervicogenic dizziness.</p> <p>Methods</p> <p>A comprehensive search was conducted in the databases Scopus, Mantis, CINHAL and the Cochrane Library for terms related to manual therapy, vestibular rehabilitation and cervicogenic dizziness. Included studies were assessed using the Maastricht-Amsterdam criteria.</p> <p>Results</p> <p>A total of fifteen articles reporting findings from thirteen unique investigations, including five randomised controlled trials and eight prospective, non-controlled cohort studies were included in this review. The methodological quality of the included studies was generally poor to moderate. All but one study reported improvement in dizziness following either unimodal or multimodal manual therapy interventions. Some studies reported improvements in postural stability, joint positioning, range of motion, muscle tenderness, neck pain and vertebrobasilar artery blood flow velocity.</p> <p>Discussion</p> <p>Although it has been argued that manual therapy combined with vestibular rehabilitation may be superior in the treatment of cervicogenic dizziness, there are currently no observational and experimental studies demonstrating such effects. A rationale for combining manual therapy and vestibular rehabilitation in the management of cervicogenic dizziness is presented.</p> <p>Conclusion</p> <p>There is moderate evidence to support the use of manual therapy, in particular spinal mobilisation and manipulation, for cervicogenic dizziness. The evidence for combining manual therapy and vestibular rehabilitation in the management of cervicogenic dizziness is lacking. Further research to elucidate potential synergistic effects of manual therapy and vestibular rehabilitation is strongly recommended.</p

Online Gender Activism in India and the participation of Indian Diaspora, 2012-2015

Adrija Dey examines the online gender activism and role of Indian immigrants who physically could not be at events and took to social media to voice their opinion and contribute to the process of change. When talking about the use of ICTs for gender activism in India, the vast digital divide that exists in India must be taken into consideration. Additionally, it is difficult to organise and strategise such a decentralised movement, and steps need to be taken to establish vital connections and collaborations in order to keep the new gender movement alive

Online Gender Activism in India and the Participation of the Indian Diaspora, 2012–2015

Adrija Dey examines the online gender activism and role of Indian immigrants who physically could not be at events and took to social media to voice their opinion and contribute to the process of change. When talking about the use of ICTs for gender activism in India, the vast digital divide that exists in India must be taken into consideration. Additionally, it is difficult to organise and strategise such a decentralised movement, and steps need to be taken to establish vital connections and collaborations in order to keep the new gender movement alive