1,720,976 research outputs found
A Review on Multi-organ Cancer Detection Using Advanced Machine Learning Techniques
No full textAbnormal behaviors of tumors pose a risk to human survival. Thus, the detection of cancers at their initial stage is beneficial for patients and lowers the mortality rate. However, this can be difficult due to various factors related to imaging modalities, such as complex background, low contrast, brightness issues, poorly defined borders and the shape of the affected area. Recently, computer-aided diagnosis (CAD) models have been used to accurately diagnose tumors in different parts of the human body, especially breast, brain, lung, liver, skin and colon cancers. These cancers are diagnosed using various modalities, including computed tomography (CT), magnetic resonance imaging (MRI), colonoscopy, mammography, dermoscopy and histopathology. The aim of this review was to investigate existing approaches for the diagnosis of breast, brain, lung, liver, skin and colon tumors. The review focuses on decision-making systems, including handcrafted features and deep learning architectures for tumor detection
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
Optimizing Handovers in Wireless Neworks Utilizing Extended MIIS Facilities
No full textThe most prevailing feature that led to the massive success of current Wireless Mobile Tele-Communication systems, is mobility. Being able to communicate on the go, anywhere and anytime has revolutionized modern day communication. In recent times the focus has not been only on simply being reachable while on the move but at the same time to use a variety of rich media content services over a variety of available network technologies, termed as 4G networks. The telecommunication development from the very beginning took two different tracks. One was the Internet which provided a fixed means of communication delivering rich media content taking full advantage of its packet switched nature. The second track was that of the cellular systems taking advantage of their circuit switched nature providing mainly voice and short messaging services to wireless and mobile users. In time both these technologies made major advances following their own respective tracks and it became evident that the convergence of both these technologies would be of even greater value. The driving force for this convergence was that a great need was felt for the support of mobility in the Internet. But since the Internet was not designed keeping mobility in mind, it did not support mobility by design. On the other hand in cellular systems in addition to circuit switching, packet switching was needed for flexibility, to make better use of network resources, and to deliver rich media content to the user at cheaper prices.
For non-mobile user’s, packet switched networks performed really well in providing the required Quality of Service (QoS). However such networks faced considerable problems to achieve similar QoS for mobile users. With no support for mobility in the Internet from scratch, new components and functionalities were needed to be incorporated into the Internet for mobility support. Examples of such functionality include location tracking, network discovery, packet re-routing to the current point of attachment of the Mobile Node (MN), accounting, authorization and authentication. Special mobility management protocols to provide the required new functionalities were needed. For this purpose the Internet Engineering Task Force (IETF) proposed Mobile IP version 4 (MIPv4) and Mobile IP version 6 (MIPv6) to support mobility for a single IP host and Network Mobility (NEMO) protocol to support mobility for a whole network in motion. These protocols have the ability to maintain data connections for mobile IP enabled devices when they roam across different subnets or networks. When a mobile user moves across network boundaries, it has to perform handover to maintain its connections. When performing a handover a MN may not be able to send or receive data packets therefore the handover duration becomes a critical factor in guaranteeing real time applications (e.g. Voice over IP (VoIP)) their QoS.
The purpose of this research work is to deal with handover issues in packets switched networks. A stepwise approach was followed during this study. Starting at layer-2 of the TCP/IP protocol stack and after identifying major problems at this layer for 802.11 networks, solutions were devised for seamless handovers by utilizing the Media Independent Information Service (MIIS) of the Media Independent Handover (MIH).
After dealing with major handover issues at the MAC layer of 802.11 networks, the work moved one layer up in the TCP/IP protocol stack to layer three or the IP layer. The MIH framework which was originally proposed for vertical handovers is proposed to be utilized for improving the efficiency of horizontal handovers. Keeping the research work focused on horizontal handovers in 802.11 networks only, an Access Point (AP) selection scheme is proposed and an investigation was carried out regarding the implications of proposed solutions at the MAC layer, on MIPv6 handover delays.
In the next step, the study is extended to vertical or heterogeneous handovers. This part proposes to break up a heterogeneous handover algorithm in a Wi-Fi/WiMAX integrated environment, into two parts. The handover algorithm parts are proposed to be executed separately from each other distributed among multiple network components, resulting in intelligent resource utilization and good scalability, without sacrificing handover efficiency.
For proof of concept and the effectiveness of the proposed schemes simulations were performed in Network Simulator-2 (ns-2) for a scenario in which a MN moves linearly in the topology, performs handovers and makes use of MIH facilities for improved handovers.
An important portion of this research also deals with the analysis of a variety of NEMO route optimization schemes proposed in the literature and their implications on handovers in NEMO networks. The goal of this part is to overview the handover signaling complexity of the various proposed NEMO route optimization schemes
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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