1,720,966 research outputs found
Mapping tourism, sustainability, and development in Southeast Asia
No full textThis book is aimed at understanding the contested role that tourism plays in achieving development in Southeast Asia. In this context, Southeast Asia represents a diverse region with different historical, political, and socioeconomic developments and a broad range of natural and cultural tourist attractions. These assets, along with favourable tourism policies, have meant that over the last three decades, international tourist arrivals in the region skyrocketed from 21.2 million in 1990 to 129 million in 2018 (UNWTO, 2019).
While Southeast Asian countries feature diverse socioeconomic and political developments, all have – to different extents – embraced tourism as a vehicle for income generation and job creation (Trupp, 2018). Simultaneously, however, different forms of (mass) tourism development have led to unequal distribution of economic benefits, overexploitation of resources, and uncontrolled tourism development
Surface Acoustic Mode Aluminum Nitride Transducer for micro-size liquid sensing applications
No full textThe thesis focuses on the investigation of thin-film surface acoustic wave (SAW) devices for liquid sensing applications. The piezoelectric material is a thin film of Aluminum Nitride (AlN), a CMOS compatible material, deposited by pulse DC reactive sputtering technique. A CMOS compatible process is developed and employed to fabricate the AlN/Si surface acoustic wave (SAW) devices which operate in a liquid medium. The applicability of the SAW device in sensing liquid is proved by numerical analysis, simulations and experimental results.In the first chapter, the development of liquid sensors based on MEMS fabrication is introduced together with the wide range of applications for these devices. Also, the motivation to investigate the SAW device based on thin film AlN for liquid sensing is presented. In chapter 2, sensing mechanisms in general and applicable mechanisms of SAW sensors for liquid are presented. To determine the most suitable design of the SAW devices, three-dimension (3D) modeling based on the finite element method (FEM) is performed and analyzed.Chapter 3 reports on the effect of a micro-size droplet shape, specifically the liquid contact angle, radius (area) and wettability of the contact surface on the SAW response. The numerical analysis and experimental results explain the interaction mechanism between the attenuated SAW beam and micro-droplets. The beam, which is emitted into the droplet, is expressed by the fraction coefficient. The change in contact radius influences the fraction coefficient more than the change in contact angle, especially on hydrophilic and super-hydrophilic surfaces. In chapter 4, the first applicability of the SAW sensor is demonstrated by identifying the kind of liquid present on the propagation path. The sensing mechanism is based on physical properties (liquid density, sound speed in liquid and evaporation rate) and mass loading (concentration of stagnant liquid molecules). This also suggests a potential method to identify liquid samples of microliter volumes in microfluidic biosensors based on this SAW device.In chapter 5, a SAW device equipped with an embedded microhole is proposed for the control and monitoring of the contact area between the piezoelectric material and the liquid medium. The device is miniaturized to be integrated on a printed circuit board (PCB). The device response to changes in density and pressure as well as to the evaporation of the liquid inside the microhole is studied. These initial indirect experimental results show the applicability of the SAW device for the state of liquid flow inside the microhole. In chapter 6, some optimized structures of the SAW device are proposed. The simulation and experimental results showed that SAW devices with circular shape FIDTs have better performance, and provide a good method to detect micro-size droplets due to the better concentration of the energy traveling through the propagation path. Also in this chapter, a mixing IDT structure for SAW devices, which includes two layers of input IDTs, is proposed to reduce the longitudinal component in SAWs and generate novel mixing acoustic waves by mixing surface waves and plate waves on the piezoelectric material. Finally, in chapter 7 concluding remarks and recommendations for future work are given.Electronic Components, Technology and Material
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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