1,720,993 research outputs found
Cabin Temperature Control of a Parked Car through Forced Ventilation
No full textM.E. (CAD/CAM Engineering)Temperature level in a car parked under direct sunlight rise up to 30˚C to 40˚C above the atmospheric temperature due to green house effect of solar radiation. Thermal Comfort of the passengers in a car is of major concern for car manufacturers as well as for passenger in peak summer season. Children and pets sometimes left unattended inside a parked car, even for short duration are vulnerable to heat stress and illness. Cooling loads also tend to increase with rapid rise in temperature once the car becomes hot. The material inside the car cabin is more prone to damages due to high temperature.
The main objective of present work is to control the temperature variation inside a parked car by rejecting the accumulating heat with the help of forced ventilation. This report includes the study of temperature variation inside the car cabin, while car is parked for long duration of 5 hours and for short duration of 15 minutes. Temperature variation was recorded with the help of thirteen different temperature sensors placed at different location inside the car cabin. The same was also verified with thermal imaging technique. Maximum temperature reduction is of 11-13 ˚C for cabin air, 24.4 ˚C for dashboard and 23.1 ˚C for the steering wheel. The experiments also found that air conditioner achieve the temperature of 32.7 ˚C in 15 minute from hot cabin at 50 ˚C with the proposed technique, whereas 39.9 ˚C was achieved in 15 minutes from 61 ˚C with the conventional system. The proposed system with auxiliary fans prevent the car cabin from high accumulating heat and facilitates the passenger to enter the cabin at much lower temperature
Dry Abrasion Wear of Windshield Glass and its Effect on Night Driving
No full textWindshield wipers are safety equipment for cars, especially for maintaining clear vision during inclement weather circumstances as rain, snow, or sleet. Windshield glass plays a crucial role in protecting driver visibility and safety, particularly during night-time conditions. Windshield wipers are employed on windshields to clear the windshield of water, snow, grime and other debris so that the driver can see clearly. However, when the glass surface is cleaned with wipers, continuous exposure to various external variables, such as dust, sand, etc., can result in the formation of dry abrasion wear. Motive of present research is to examine; how dry abrasion wear affects windshield glass and its effect on night-time driving. In the past, numerous studies demonstrating windshield wear have been conducted, but none in India, where the amount of dust and debris in the air is more than in other nations. Additionally, no studies have looked into windshield wear under actual environmental conditions.
The wearing of windshield glass and its effect on visibility at night have been examined through a number of tests. A proper setup with a functioning wiper mechanism was designed to abrade the windshield with the dust accumulated in natural environmental conditions. Different wear regions on the windshields were identified and high-resolution night photography was carried out to observe the impact of windshield wear during night-time driving. To assess windshield wear, the roughness of the windshield glass was also tested. Using the EDS method, the constituents of the dust that was deposited on the windshield glass were also assessed.
The findings from the experiments shows that dry abrasion wear has a substantial impact on the windshield glass surface and increases light scattering at night. It is also verified that as the number of wiper cycles on the windshield increases, the wear increases, i.e., the scattering of light is greater in the regions where the wiper cycles are higher. Another important finding reveals that new wiper blade damages the windshield glass more than the old wiper blade, as it has a better area of contact
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
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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Experimental and Analytical Modelling and Control of Precision Surgery Manipulator
No full textME-CAD/CAM-DissertationIn this fast growing world everyone is trying to be perfect and want to reach anywhere with as much as less time it takes. So, in the medical field also every patient want to get best treatment with high precision and accuracy. A robotic arm can provide both of them which can be controlled by computers and the inputs given by a specialise doctor sitting on another table or may be somewhere else in the world. The robotic surgery enables surgeons to perform even the most complex and delicate procedures through very small incisions. A robotic surgery provide patient less time to recover, less blood loss.
Designing of manipulator for the considerations of functions it performs, its limitations and motor housing.
Complete robotic manipulator's construction in Solid Works software with all the attachment of motors and how the motion transferred to different joints by the use of ropes or belts is designed.
Forward modelling and inverse modelling using Bond Graph of robotic manipulator systems are developed.
The forward kinematics and inverse kinematics of the robotic manipulator by using Denavit-Hartenberg (D-H) representation and Newton-Rapson method by using Mat lab tool of serial manipulator.
Comparison of the results comes from both methods i.e., Bond Graph approach and D-H approach.
Its back hand system which is to transfer motions to joints and by which motor is used in here with the all construction of it in Solid Works and by use of Rapid Prototyping Machine.This thesis work is a joint work carried out in collaboration with CSIO Chandigarh.
MED, TU, Patial
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