1,723,153 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Endgame optimisation
No full textWithin the defence industry, there is the need to provide an improvement in the efficiency (performance) of a missile system. The present generation of missile systems are sub-optimal in many currently considered scenarios. Scenarios include both anti-air and ground attack domains and these have to allow for an increased usage of stealth, more effective countermeasures, and better mission survivability by making use of redundancy in subsystems. There are many methods by which this improvement in efficiency can be achieved The traditional approach to improving the lethality of a missile has been to concentrate efforts in the guidance and control systems to improve accuracy and agility.This thesis considers how optimizing the endgame, the final few milliseconds before detonation, can yield improvements in overall lethality. This is achieved using traditional optimisation techniques and has investigated possible missile warhead fusing strategies which may be used in order to provide robust, high lethality engagement conditions for an air-to-air missile system. The development of various fusing strategies has been performed based on observations made during the undertaking of this research. This included development of fusing rules used for the missile warhead and the development of advanced fusing algorithms that look at past missile fly-out and lethality data to aid the decision process of when to fuse the missile
Transcanal infrapromontorial approach for internal auditory canal surgery and cochlear implantation.
No full textObjective: To demonstrate the feasibility of a transcanal infrapromontorial approach for vestibular schwannoma surgery through an anatomical dissection study and the description of a clinical case. Methods: A microscopic and endoscopic dissection of cadaveric heads was undertaken through a transcanal infrapromontorial approach to the internal auditory canal (IAC), preserving the cochlea and the cochlear nerve. Description of the anatomy and surgical steps is reported as well as presentation of a clinical case in which a transcanal infrapromontorial approach was performed. Results: In all of the cadaveric dissections, a transcanal infrapromontorial route with near total cochlea preservation was performed, removing only the most posterior portion of the basal turn of the cochlea. The IAC was opened through removal of "cochlear-vestibular bone". At the end of the dissection a cochlear implant array was placed. A transcanal infrapromontorial approach was also performed in a patient to allow a concurrent cochlear implant placement, with good postoperative results. Conclusion: The transcanal infrapromontorial approach permits the preservation of the cochlea and the cochlear nerve. This approach may be considered as an option in case of a small intracanalicular schwannoma removal (< 0.5 cm cerebellopontine angle spread), when concurrent cochlear implantation is indicated
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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