182,733 research outputs found
Asia with the islands adioyning described, the atire of the people & townes of importance, all of them newly augmented by I.S. Ano dom. 1626 [cartographic material] /
No full textMap of Asia from Saudi Arabia, Russia, India, China, Japan and Southeast Asia with relief shown pictorially.; "Are to be sold by Thos: Bassett in Fleet Street, and Richard Chiswell in St. Pauls Churchyard".; In the side borders are 10 figures displaying national Asian costumes and in the upper border are 7 town views of: Candy, Goa, Damascus, Jerusalem, Ormus, Bantam, Aden and Macao.; Text on verso: The description of Asia (p. 3-4).; From: The theatre of the empire of Great Britain / J. Speed. London : for T. Basset & T. Chiswel, 1676.; Phillips, 488.; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.map-rm175
Modelling and control of a variable-speed switched reluctance generator based wind turbine
No full textThis paper studies the system modelling and control aspects of switched reluctance generator (SRG) based variable speed wind turbines. A control system is implemented to provide proper operation of the SRG as well as power tracking capabilities for varying wind speeds. The control system for the grid side inverter that will allow the SRG to properly generate power to the system is also presented. Studies are presented of both the SRG and inverter control systems capabilities during a balanced three-phase fault. The paper will demonstrate that the SRG based wind turbine presents a feasible variable wind speed solution with good fault response capabilities
Simulating Speed in Language: Contributions from vision, audition and action
No full textEmbodied theories propose that understanding meaning in language requires the mental simulation of entities being referred to. These mental simulations would make use of the same modality-specific systems involved in perceiving and acting upon such entities in the world, grounding language in the real world. However, embodied theories are currently underspecified in terms of how much information from an event is contained in mental simulations, and what features of experience are included. The thesis addresses comprehension of language that describes speed of events. Investigating speed allows embodied theories to be extended to a more complex feature of events. Further, speed is a fine-grained feature and thus testing an embodied theory of speed will reveal whether or not mental simulations include the fine details of real-world experience. Within the thesis four main methods of investigation were used, assessing simulation of speed with different types of speed language under different conditions: behavioural testing combining speed in language with speed in perception and action, eye-tracking investigating whether eye-movements to a visual scene are affected by speed in sentences, a psychophysics paradigm assessing whether speed in language affects visual perception processes, and finally, as a crucial test of embodiment, whether or not Parkinson’s patients, who have difficulty moving speedily, also have problems with comprehension of speed language. The main findings of the thesis are that: (1) speed, a fine-grained and abstract dimension, is simulated during comprehension, (2) simulations are dynamic and context-dependent, and (3) simulations of speed are specific to biological motion and can encode specific effectors used in an action.
These results help to specify current embodied theories in terms of what the nature of simulations are and what factors they are sensitive to, in addition to broadly providing support for the sharing of cognitive/neural processes between language, action and perception
Mathematical modelling and experimental validation of electrostatic sensors for rotational speed measurement
No full textRecent research has demonstrated that electrostatic sensors can be applied to the measurement of rotational speed with excellent repeatability and accuracy under a range of conditions. However, the sensing mechanism and fundamental characteristics of the electrostatic sensors are still largely unknown and hence the design of the sensors is not optimised for rotational speed measurement. This paper presents the mathematical modelling of strip electrostatic sensors for rotational speed measurement and associated experimental studies for the validation of the modelling results. In the modelling, an ideal point charge on the surface of the rotating object is regarded as an impulse input to the sensing system. The fundamental characteristics of the sensor, including spatial sensitivity, spatial filtering length and signal bandwidth, are quantified from the developed model. The effects of the geometric dimensions of the electrode, the distance between the electrode and the rotor surface and the rotational speed being measured on the performance of the sensor are analyzed. A close agreement between the modelling results and experimental measurements has been observed under a range of conditions. Optimal design of the electrostatic sensor for a given rotor size is suggested and discussed in accordance with the modelling and experimental results
Understanding temporal rhythms and travel behaviour at destinations: Potential ways to achieve more sustainable travel
No full textThis paper analyses the roles played by time in destination-based travel behaviour. It contrasts clock time's linear view of time with fragmented time, instantaneous time, fluid time and flow, time out and the multiple temporalities of tourism experiences. It explores temporal issues in a destination travel context, using qualitative techniques. Data were captured using diary photography, diary-interview method with tourists at a rural destination; their spatial and temporal patterns were captured using a purpose built smartphone app. The analysis revealed three temporal themes influencing travel behaviour: time fluidity; daily and place-related rhythms; and control of time. Three key messages emerge for future sustainable tourist destination-based travel systems. Given the strong desire for temporal fluidity, transport systems should evolve beyond clock-time regimes. Second, temporal forces favour personal modes of transport (car, walk, cycle), especially in rural areas where public transport cannot offer flexibility. Third, the car is personalised and perceived to optimise travel fluidity and speed, but is currently unsustainable. Imaginative initiatives, using new mobile media technology can offer new positive and proactive car travel, utilising spare public and private vehicle capacity. Research is needed to implement mechanisms for individualised space-time scheduling and collective vehicle use strategies. © 2013 Copyright Taylor and Francis Group, LLC
Automating the determination of wave speed using the pu-loop method
No full textThe PU-loop (pressure-velocity loop) is a method for determining wave speed and relies on the linear relationship between the pressure and velocity in the absence of reflected waves. This linearity of the PU-loop during early systole, which is directly related to wave speed, has always been established by eye. This paper presents a new technique that establishes this linearity and thus determining wave speed online. Pressure and flow were measured in the ascending aorta of 11 anesthetised dogs. The slope of the PU-loop, indicating wave speed was determined by eye and by using the new technique. The difference between the slopes of the two methods is in the order of 3%. The new technique is convenient and allows for the online assessment of wave speed, which could be used as a bedside tool for the assessment of arterial compliance
Limiting travel speed in additive layer manufacturing
No full textWire and Arc Additive Manufacture (WAAM) is new approache to modern manufacturing. This technology has been gaining the interest of the research community due to its high deposition rate and efficiency. In Wire and Arc Additive Manufacture an increase in productivity can be achieved through the use of high weld travel speeds. However, this can be overshadowed by the so called humping effect. Humping is a defect in welding which expresses itself by the formation of humps and valleys that prevent further welding deposition operation. The generation of these defects is studied by critically examining the various weld travel speeds from different weld parameters. From the study the actual weld travel speed in which humping formation starts to appear is 0.6m/min. The effects of wire feed speed and travel speed on bead geometries are also been discussed
The kingdome of China [cartographic material] /
No full textMap of China including Japan as well as the Ile Corea [i.e. the "island" of Korea]. Eastern India is displayed on the left of the map. The map displays many decorative features mainly vignettes at the top showing land-yachts for travelling by land, execution by crucifixation, pictorial bird's-eye views of the cities of Macao and Quinzay [i.e. Hangchow], and on the sides eight costumes from men and women of Asian cultures. Relief is shown pictorially.; Title in cartouche.; Decorative border of painted scenes at top of map: Ye. Ma[n]ner of their Trauelling by la[n]d' -- 'Macao' -- [Blank shield without coat of arms] -- Quinzay -- the Manner of their Execution.; Decorative border of painted scenes at left of map: A Chinian woman -- A souldier of Iapan -- A Chinian -- A men of Pegu.; Decorative border of painted scenes at right of map: A Chinian men -- A Chinian men -- A Souldier of Iapon -- A women of Pegu.; Imprint on map: [London] : Are to be sold by Tho. Bassett in Fleet Street and Ric. Chiswell in St. Pauls Church Yard, 1626.; Text on verso entitled: The description of the Kingdom of China, p. 38-39 (includes signature: T).; Map 19 from: A prospect of the most famous parts of the world, viz, Asia, Africa, Europe, America with these empires and kingdoms ... / by John Speed. London : Printed for Thomas Bassett at the George in Fleet Street and Richard Chiswell at the Rose and Crown in St. Pauls Church Yard, 1676.; Shirley, R. Maps in the atlases of the British Library ; T-SPE-2f; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.map-rm272.Kingdom of ChinaVerso text title Description of the Kingdom of Chin
Speed Choice, Speed Preference and Risk Perception: Relevance for the Problem of Speed Variability in Traffic
No full textFifty percent of drives have been found to frequently violate speed limits (OECD/ECMT, 2006), and speed limit compliance appears to depend on the perceived credibility of a road’s speed limit (Goldenbeld & van Schagen, 2007). Credibility of speed limits, in turn, appears to be determined by the match between drivers’ speed preferences and the design of the road (Goldenbeld & van Schagen, 2007). Yet, a challenge has been that not all drivers’ prefer the same speeds, and individual differences with regards to speed preference lead to speed variability and speed conflicts in traffic (Elvik, 2010). The aim of this thesis was to explore whether the speed drivers like to drive when motivated by different driving goals (speed preference) correspond to the speeds that they actually drive on those same roads (speed choice). Additionally, this thesis sought to explore the relationship between speed preference and risk perception. Data was collected in two ways, from a speed gun and from a questionnaire. The speed gun collected on-road measures of driving speeds on seven different roads, while the questionnaire collected measures of drivers’ self-reported speed, speed preference and risk perception. For the speed preference measures, participants were asked what speed they would choose on a given road when: 1) motivated by safety, 2) considering fuel savings, or 3) motivated by fun, and additionally 4) what speed they usually drove on the road. In total 200 drivers were interviewed at five different parking lots, and they referred to the seven roads that were sampled with the speed gun. The results indicated that speed preference helped to explain actual driving speeds. More specifically, drivers’ different driving goals and their large individual differences with regards to speed preference corresponded to different speed choices. No relationship was found, however, between drivers’ speed preferences and their risk perceptions. The results are discussed with regards to implications for the problem of speed variability in traffic
t-test results for different speed perception patterns.
No full textt-test results for different speed perception patterns.</p
- …
