cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.14291395.v1
title: Force Density Relation and Lightweight Modeling of Single Layer Tensegrity Structures

description: ABSTRACT: A mathematical model is established using the space coordinates of nodes and vector matrix of components to study the construction method and lightweight nature of single-layer tensegrity structures on the basis of their geometric parameters. Connection matrix and configuration of the single-layer tensegrity structures are built using MATLAB software. The force balance equations of nodes of a three-bar tensegrity structure are established by introducing the force-density method, and the force-density relationship amongst the components is analysed. Thus, the configuration principle of single-layer tensegrity structure is verified. The force-density relationship between the components in the single-layer tensegrity structure is obtained. The change rule of the force-density relationship in different single-layer tensegrity structures is also analysed. Notably, p-1 stable configurations are present in the p-bar tensegrity structure. The force-density relationships of these p-1 configurations are in symmetrical distribution, that is, the j-th and (p-j)th configurations have the same force-density relationship. The lightweight nature of the structure is studied using the force-density relationship between the components, and the optimal structural parameter relationship is obtained when the structure has the lightest mass.
DOI: 10.6084/m9.figshare.14291391.v1
title: Aviation Dentistry: is it an Unexplored Field of Dentistry? A Cross-Sectional Study

description: ABSTRACT: Background: There is an increase in the number of flight travellers and with it comes the risks of developing in-flight dental conditions that evokes pain at higher altitudes. The knowledge about such conditions are necessary among the dentists to prevent such phenomena. Aim: To assess the knowledge and familiarity about aviation dentistry among dentists. Methodology: A cross-sectional questionnaire-based study conducted among 170 postgraduates and dental professionals in a private dental institution. A pilot study was conducted among 30 individuals, and the questionnaire was validated. Data was analysed by SPSS package 20. Descriptive statistics and chi-square tests were used. Results: 61.8% of the individuals were not familiar with the term aviation dentistry. A statistically significant association was found between familiarity with aviation dentistry and the qualification of the dentists and also between familiarity with aviation dentistry and years of experience of the dentists with a p value &lt; 0.05. Conclusion: The study result shows the lack of knowledge about aviation dentistry among postgraduates and dental professionals.
DOI: 10.6084/m9.figshare.14291389.v1
title: Suitability Analysis of Implementing a Fuel Cell on a Multirotor Drone

description: ABSTRACT: Increased flight time of multirotor drones is a key enabler for further adoption and industrial use of drones. A model for analyzing the performance of a fuel cell hybrid system for a multirotor drone is presented and applied for a case with an X8 multirotor drone with a maximum take-off mass of 25 kg. Endurance is the main performance parameter, and the model can be used to quantify the relative performance between different power sources. The model aims to determine if a specific hybrid fuel cell system is a viable option for a given multirotor drone and if it will provide better endurance than when powered by batteries. The model can also be used in system optimization and sensitivity analysis. In a case study, a fuel cell hybrid system with a 7.2 L cylinder with hydrogen at 300 bar is found to increase the flight time by 43 minutes (+76%) from the currently used LiPo-batteries. A plot identifies the energy system mass threshold for when the fuel cell hybrid system gives better endurance than batteries to be 7.3 kg. Based on current technology status, the cost of a fuel cell hybrid system is about 12 times that of LiPo-batteries.
DOI: 10.6084/m9.figshare.14291387.v1
title: The Aircraft Choice Based on the Aircraft Take-Off Runway Length Requirement

description: ABSTRACT: The choice of fleet by a given airline must consider different elements associated with both the aircraft and the airports to be operated, making it necessary a method to assist the aircraft choice process. This study assesses the take-off runway distance requirement of different aircraft models and compares the requirement to the take-off runway distance available at a group of airports. Using the Herfindahl-Hirschman index (HHI), the methodology consider the analysis of take-off runway length available on 80 Brazilian airports and compared it to the take-off distance required for 108 combinations of aircraft model, engine model and flight range, considering the take-off performance of the aircraft models with maximum payload weight. In total, 536 routes of four Brazilian airlines has been adopted to simulate the most profitable operating scenario. The result presents the take-off performance of different aircraft models and allows a performance comparison between them. In addition, this research investigates which is the most common flight range in Brazil, and what influence it exerts in the aircraft take-off performance, and contributes to a better match between the aircraft used and the airport operated in fleet optimization.
DOI: 10.6084/m9.figshare.14291386.v1
title: Rheological Properties of Composite Polymer Liner Based on Hydroxyl‐Terminated Polybutadiene

description: ABSTRACT: An experimental study to determine the dependence of the viscosity and shear stress of hydroxyl-terminated polybutadiene (HTPB) and dimeryl diisocyanate (DII) liner on curing time is presented. Viscosity and shear-stress were measured by HAAKE RheoStress 600 rheometer with parallel disks configuration at a constant temperature of 65 °C. The viscosity and shear-stress change were monitored for 8 h. Analysis of data showed that the liner viscosity and shear-stress dependency on time matched to pseudoplastic fluid model. For low shear-rates, the viscosity build-up is highest, with the logarithm of the viscosity being practically linear with time and the viscosity increases by more than two orders of magnitude for these cases. When the shear rates increase, the viscosity build-up slows down considerably with time and the viscosity is increased only by one order of magnitude.
DOI: 10.6084/m9.figshare.14291385.v1
title: Investigation of Aerodynamic Characteristics of a Wing Model With RGV Winglet

description: ABSTRACT: This work describes the aerodynamic characteristics of an aircraft wing model with a Rüppell’s griffon vulture (RGV)-type winglet. A computational fluid dynamics (CFD) study using ANSYS 15.0 was conducted to study the effect of the RGV winglet on a rectangular wing. The NACA 65(3)-218 wing consists of 660 mm span and 121 mm chord length where the aspect ratio is 5.45. Eight different winglet configurations have been studied. Furthermore, the study is extended to study effect of cant angle and different angles of attack (AOA) to the winglet. A comparative study is done on aerodynamic features such as lift coefficient (CL), drag coefficient (CD), lift/drag ratio (CL/CD) and tip vortices to get the best RGV winglet design. The RGV winglet achieved highest CL compared to other types of winglets configuration. Based on contour plot analysis, the RGV winglet shows lower vortex formation compared to without winglet. The results show about 15 to 30% reduction in drag coefficient and 5 to 25% increase in lift coefficient by using an RGV winglet.
DOI: 10.6084/m9.figshare.14291383.v1
title: Development of an Autonomous Redundant Attitude Determination System for Cubesats

description: ABSTRACT: This work deals with the problem of the design of an autonomous redundant system for the attitude determination of nanosatellites. The system consists of a circuit board equipped with three microcontrollers, a magnetic field sensor in three axes, and complementary commercial-of-the-shelf (COTS) components and connectors to provide data signal exchange the vehicle on-board computer. The main goal of this system, named SDATF (of the acronym in Portuguese Sistema de Determinação de Atitude com Tolerância a Falhas), is to provide autonomously the vehicle attitude from the information collected from the onboard computer (OBC) and the magnetometer. The adopted attitude determination algorithm is based on the well-known QUEST method, and the goal of this system is to get accurate attitude computations to low-orbit CubeSat satellites using COTS electronic components, and to provide highly reliable data and high availability levels using fault tolerance tools to avoid the harmful consequences of spatial radiation and its faults known as single event upsets (SEU). The article presents the general design of the fault-tolerant systems and experimental tests using bit flip injection methodology.
DOI: 10.6084/m9.figshare.14291382.v1
title: Reliability Approach to Optimal Thruster Configuration Design for Spacecraft Attitude Control Subsystem

description: ABSTRACT: An optimal thruster configuration for attitude control subsystem of a spacecraft is presented in this paper. The optimal configuration is designed according to minimum number of required thrusters for satisfying desired reliability with specific redundancy level. The genetic algorithm is employed for optimization process and feasibility of the results is evaluated using algebraic and geometry methods. The main feature of the proposed configuration among feasible configuration with minimum number of required thrusters, which has held to optimal configuration, is that this configuration has maximum reliability and minimum fuel consumption. In addition to feasibility, attitude control performance of some configurations is also examined through the simulation. The results of simulation confirm that the proposed configuration has desirable performance. It is noteworthy to mention that the configuration with maximum number of required thrusters, which is a conventional configuration such that each thruster belongs to only one control channel, has less fuel consumption than optimal configuration. However, the total mass of optimal configuration is less than that of conventional configuration due to a smaller number of thrusters.
DOI: 10.6084/m9.figshare.14291381.v1
title: Single European Sky: The progress so Far

description: ABSTRACT: This paper aims to assess the progress made towards the implementation of a Single European Sky (SES). It examines the program’s four main key performance indicators - environmental impact, safety, cost efficiency and capacity - and depicts in more detail the sequence of changes in each problematic area, thereby providing a better visualization of the main milestones and the issues hindering proposed reforms. The paper concludes that the overall process of reforming European airspace within SES has been slow and delayed, partly due to a lack of cooperation and commitment from air navigation service providers and states to deliver the information needed and apply desired amendments. The paper recommends several actions, which could improve the SES performance, including among others the implementation of incentives to meet the program’s objectives, as well as penalties for lack of cooperation, and the introduction of a common en-route charging rate at the European level.
DOI: 10.6084/m9.figshare.14291370.v1
title: Language, Translation, and the Irish Theatre Diaspora in Quebec

description: Abstract: This article argues for the inclusion of Québécois translations of Irish plays as part of the Irish theatrical diaspora. The presence of an Irish diaspora in North America was mainly the result of massive waves of immigration, in large part due to the Great Famine, peaking during the mid-nineteenth century before gradually abating. This diaspora was integrated into Quebec society, undoubtedly facilitated by similar political, religious, and even linguistic elements. Interest in Irish culture, especially in its theatrical output, remains high, with many theatre companies, for example Théâtre La Licorne in Montreal, in the province commissioning seasons based on Celtic Tiger-era dramas, translated by Québécois playwrights. In tracing the reason for this interest, despite diminished recent immigration, this article provides the basis for continued research into the performative force of proactive translations across varying diasporic traditions.
DOI: 10.6084/m9.figshare.14291369.v1
title: THE EXISTENTIAL PERFECT AND ITS MORPHOLOGICAL AND ADVERBIAL REALIZATIONS IN AMERICAN ENGLISH

description: Abstract The perfect aspect reveals an interval between two points in time. One of its types is the existential perfect (EP), that may be related to a past situation with effects in the present. The goal of this study is to investigate the morphological and adverbial realizations compatible with the EP, associated with the present, in American English (AE). The methodology consisted of analyses of corpora – interviews taken from the American TV and the Santa Barbara Corpus of Spoken American English – and of data obtained by a linguistic test. The hypothesis is that the realization of the EP associated with the present in AE only occurs through “have” + past participle, with or without the overt realization of the auxiliary verb. The hypothesis was refuted, since the simple past was also found while realizing this aspect. We discussed the contribution of the verbal forms, adverbs and the plurality of events in the expression of the EP.
DOI: 10.6084/m9.figshare.14291362.v1
title: REMARKS ON SOME MINIMALIST ACCOUNTS FOR BINDING

description: Abstract The present paper is a reassessment of the empirical and theoretical arguments presented by some minimalist accounts for binding. Some of them assume that the binding principles are conditions on LF representations, while others argue that they are derived by narrow syntax computations. I present some observations indicating that there is not yet a satisfactory account for binding. Despite that, the amounted evidence indicates that binding is derivational. Nevertheless, pragmatics seems also engaged in building coreferentiality.
DOI: 10.6084/m9.figshare.14291361.v1
title: THE DEVELOPMENT OF LANGUAGE AND ITS INTERACTION WITH OTHER ASPECTS OF COGNITION: THE CASE OF MEDIAL WH-QUESTIONS IN ENGLISH AND IN BRAZILIAN PORTUGUESE

description: Abstract Preschool children acquiring English and Brazilian Portuguese display a peculiar behavior when prompted to produce multi-clause wh-questions. In elicited production tasks, structures with an extra wh-element in medial position are sometimes produced. Such medial questions are impossible in the adult languages being acquired. Following a hypothesis put forth by Grolla & Lidz (2018), we propose that children’s productions are not generated by children’s grammar, but reflect difficulties of their developing cognitive system. More specifically, we propose that children’s more limited inhibition control capacity leads them to pronounce elements with high activation levels in wrong places of the structure. Experimental data on both languages are provided which corroborate this claim. These data show that children with more limited inhibition control capacity are more likely to produce medial wh-questions.
DOI: 10.6084/m9.figshare.14291359.v1
title: NO ESCAPE FROM CATEGORIZATION: AN INSIDER’S VIEW OF COMPOUNDS

description: Abstract There has been a surge of syntactic research on compounding, joining a large literature on the nature of roots and phase theory. In an attempt to probe into the syntactic domain for idiosyncratic interpretation and to account for categorial exocentricity, disappearance of subcategorization, and lexical integrity effects, some recent studies on compounding have argued that root compounds are made up of two free acategorial roots directly merged in syntax, without undergoing categorization. The main goal of such an approach is to extend the phase domain in order to maintain two uncategorized roots awaiting further Merge operations. When a category head is merged on the top of this structure, it will trigger its Spell-Out, and as a result, both roots will (i) receive a single category status, (ii) be identified as a single syntactic object for the purposes of extraction and binding, and (iii) be assigned a non-compositional interpretation. In this article, we argue that root categorization should not be analyzed as an optional derivational step. By exploring compounding in Brazilian Portuguese, we identify a handful of phenomena that challenge the assumption that root compounds are made up of two bare roots. We propose that categorial exocentricity, subcategorization, and lexical integrity effects can be straightforwardly accounted if we assume that the unifying characteristic of compounds is the presence of a category head merged on the top of two categorized roots. We claim that non-compositional domains are not determined by categorization. Following Harley (2014), we admit that non-compositionality is assigned at LF through a set of LF instructions associated with roots in a particular syntactic environment.
DOI: 10.6084/m9.figshare.14291358.v1
title: DOES ELLIPSIS REPAIR HEAD MOVEMENT CONSTRAINT VIOLATIONS?

description: Abstract Using English data, I show that Head Movement Constraint violations cannot be repaired by deletion and compare this result with cases of both salvation and non-salvation by ellipsis from previous literature. I then consider two possible sources for this lack of repair. The first is to take the Head Movement Constraint as a derivational constraint, and the second is to assimilate it into the Empty Category Principle (Chomsky, 1986).
DOI: 10.6084/m9.figshare.14291357.v1
title: ONLINE PSYCHOLINGUISTIC METHODS: THE MAZE TASK

description: Abstract Many researches in the field of psycholinguistics and other sub-areas of linguistics involve analysis of reaction time (RT) of human beings when reading certain linguistic structures. These RTs are used as indicative of the difficulty of processing different linguistic units. To collect this type of information, two methods are widely used: eye tracking (Rayner) and self-paced reading (Mitchel (a)). However, the data obtained by these methods may contain noise that makes the analysis of the results more complex. In this paper, we will present another option of an experimental reading method that seems to mitigate these noises: the maze task (Forster; et al.). Proponents of this experimental technique argue that the data it generates is less noisy because it inhibits spill-over effects, reduces the possibilities of reading strategies and requires a high level of attention from the participants. Thus, the data is found in the expected region and comprehension questions are not necessary. We describe in this article some of the first studies that used this technique. The results of these studies corroborate its methodological potential, since they demonstrate that the task generated localized data that converged with processing effects previously observed in the literature.
DOI: 10.6084/m9.figshare.14291355.v1
title: LANGUAGES IN CONFLICT: MODELS FOR LEXICAL ACCESS BASED ON ORTOGRAPHIC INPUT IN BILINGUALS OR MULTILINGUALS AND THE EFFECT OF MULTILINGUALISM IN THE EXECUTIVE FUNCTIONS

description: Abstract The phenomenon of bilingualism is the essential premise for translation. This paper presents contemporary cognitive models for written word recognition, based on previous experimental work with interlingual homographs. We will discuss studies on language conflict between two or more languages, and how these findings provide support for the language non-selective hypothesis for lexical access, which elucidates the impact of bilingualism in the processes of reading and translation. As a secondary goal and with a neuroscientific perspective, we will also describe the changes in the brain and mental processes that underlie the experience of bilingualism and multilingualism. Studies discussed here demonstrate an advantage in executive function (updating, inhibition and mental flexibility) as well as structural and functional changes in circuits, especially involving the prefrontal cortices bilaterally. These changes have been indicated as important protective factors in different situations of neural loss.
DOI: 10.6084/m9.figshare.14291349.v1
title: FORM AND CONTENT ANOMALIES IN BRAZILIAN PORTUGUESE: A PRELIMINARY EYE-TRACKING STUDY OF READING AND ACCEPTABILITY EVALUATION

description: Abstract The present study uses the eye tracking methodology to investigate to what extent the reading of sentences in Brazilian Portuguese may differ in relation to grammatical and semantic anomalies and how these sentences are evaluated for their good formation, taking as control syntactically and semantically well-formed sentences. The analyses of the on-line data, allowed us to identify that sentences that present anomalous number agreement features in the object noun phrase are more costly in terms of fixation and refixation patterns than the semantic anomalous sentences, even though they may be better accepted by educated speakers in the off-line measure than sentences with semantic anomalies. It is argued that the results provide evidence in favor of structural models of sentence processing.
DOI: 10.6084/m9.figshare.14291343.v1
title: NOTIONS ON READING VIEWED BY COGNITION

description: Abstract The objective of this article is to introduce to translators, professors as well as graduate and undergraduate students how the brain works to enable us to extract meaning from a string of letters being focused by the fovea under the attentional beam: to read. In order to initiate novice readers to the topic, the introduction explains the relevance of the matter by providing factual numbers of the functional illiteracy in Brazil. Secondly, a broad overview of the eye-tracker is provided as a tool to measure latencies and show the fixations of the eyes while reading. Thirdly, parts of the eyes related to the reading skill are presented. At last, an account of the Visual Word Recognition is accorded describing the processes that support the mapping of spelling-to-sound spelling-to-meaning, emphasizing that words are coded and analyzed at multiple levels. The functional relationships between orthographic, phonological, and semantic variables are explored. There is an attempt to focus on both the interactive processing between different layers as well as the architecture and processing dynamics of the visual word recognition system.
DOI: 10.6084/m9.figshare.14291342.v1
title: THE EFFECT OF COGNATE WORDS ON LEXICAL ACCESS OF ENGLISH AS A THIRD LANGUAGE

description: Abstract In this paper, the results of an experimental study carried out in order to investigate the effect of triple cognates in the lexical access of speakers of English (L3), German (L2), and Brazilian Portuguese (L1) is presented. Participants performed a reading task, containing 60 experimental sentences with the following critical words: triple cognates, double cognates between Brazilian Portuguese and English, and double cognates between German and English. Participants’ eye movements were recorded while they performed the task. The measures of first fixation and first reading pass times were analyzed. The results suggested that triple cognates were processed faster than their respective controls in first fixation (M: 264/311ms (cognate/control); p=0,03) and first pass (M: 407/448ms (cognate/control); p=0,05), which was interpreted as evidence of a nonselective lexical access and an integrated lexicon for the multilinguals’ languages. In addition, these results contribute to the literature of lexical access of multilinguals, favoring the view that all the languages of a multilingual are active even when the speaker intends to use only one language.