scholarly journals Mininet-WiFi: Plataforma de Emulação para Redes sem Fio Definidas por Software

2019 ◽  
Author(s):  
Ramon Dos Reis Fontes ◽  
Christian Esteve Rothenberg
Keyword(s):  
Real World ◽  
Effective Means ◽  
Interference Management ◽  
Wireless Networking ◽  
Spectrum Management ◽  
Software Components ◽  
Multiple Perspectives ◽  
Control Functions ◽  
Data Plane ◽  
Network Emulator

Software-Defined Wireless Networking (SDWN) has gained attraction as an appealing approach to decouple radio control functions, such as spectrum management, mobility management, and interference management, from the radio data plane devices. Despite diverse ongoing efforts to realize the vision of SDWN, many questions remain open from multiple perspectives, one of them being effective means to experiment and rapid prototyping of software components applicable to real-world deployments. To this end, realistic emulation of SDWN environments has the potential to boost research and development efforts by reusing existing protocol and application stacks while mimicking the behavior of real wireless networks. This thesis is centered around the feasibility of such an approach through the design, implementation, and evaluation of the Mininet-WiFi wireless network emulator.

scholarly journals Multiple Noisy Label Distribution Propagation for Crowdsourcing

2019 ◽  
Author(s):  
Hao Zhang ◽  
Liangxiao Jiang ◽  
Wenqiang Xu
Keyword(s):  
Supervised Learning ◽  
Real World ◽  
Effective Means ◽  
Ground Truth ◽  
Cost Effective ◽  
Nearest Neighbors ◽  
True Label ◽  
Real World Datasets ◽  
The Individual ◽  
Label Distribution

Crowdsourcing services provide a fast, efficient, and cost-effective means of obtaining large labeled data for supervised learning. Ground truth inference, also called label integration, designs proper aggregation strategies to infer the unknown true label of each instance from the multiple noisy label set provided by ordinary crowd workers. However, to the best of our knowledge, nearly all existing label integration methods focus solely on the multiple noisy label set itself of the individual instance while totally ignoring the intercorrelation among multiple noisy label sets of different instances. To solve this problem, a multiple noisy label distribution propagation (MNLDP) method is proposed in this study. MNLDP first transforms the multiple noisy label set of each instance into its multiple noisy label distribution and then propagates its multiple noisy label distribution to its nearest neighbors. Consequently, each instance absorbs a fraction of the multiple noisy label distributions from its nearest neighbors and yet simultaneously maintains a fraction of its own original multiple noisy label distribution. Promising experimental results on simulated and real-world datasets validate the effectiveness of our proposed method.

Controlled Alignment of Nanowires for Transparent Conductive Films: Methods and Applications

2021 ◽  
Vol 17 ◽  
Author(s):  
Zheng Li ◽  
Ruo-Zhou Li ◽  
Jing Yan ◽  
Ying Yu ◽  
Yuming Fang
Keyword(s):  
Effective Means ◽  
Research Work ◽  
Organic Light Emitting Diodes ◽  
Multiple Perspectives ◽  
Light Emitting ◽  
Transparent Conductive Films ◽  
Precise Control ◽  
Conductive Films ◽  
Organic Light

Background: Nanowires (NWs) have received extensive attention as the candidate materials for transparent conductive films (TCFs) in recent years. To date, the aligned nanowire (NW)-based TCFs with the same arrangement direction have shown superior characteristics to their random counterparts in applications. Objective: To fully develop the potential of NW TCFs in devices and provide inspiration for the development of subsequent NW alignment processes, this review summarizes state-of-the-art alignment techniques and emphasizes their mechanisms in detail from multiple perspectives. Methods: According to the mechanism of NW alignment, this review divides these techniques into seven categories, i.e., the assisted assembly of fluid flow, meniscus, pressure, template, electromagnetic field, contact and strain, and analyzes the characteristics of these techniques. Moreover, by briefly enumerating the applications of aligned NW films in solar cells, organic light-emitting diodes, and touch screens, the superiority of aligned NW films over random NW films is also addressed. Results: Contact-assisted assembly exhibits the best arrangement effect, reaching a 98.6% alignment degree within ±1°. Under the same conditions, shorter NWs show better alignment in several cases. The combination of various assembly techniques is also an effective means to improve the alignment effect. Conclusion: There is still room for improvement in the precise control of NW position, density and orientation in a simple, efficient and compatible process. Therefore, follow-up research work is needed to conquer these problems. Moreover, a process that can realize NW alignment and film patterning simultaneously is also a desirable scheme for fabricating personalized devices.

scholarly journals Multiple Perspective of Cloud Computing Adoption Determinants in Higher Education a Systematic Review

2019 ◽  
Vol 9 (3) ◽  
pp. 89-109 ◽  
Author(s):  
Mohammed Banu Ali
Keyword(s):  
Higher Education ◽  
Cloud Computing ◽  
Effective Means ◽  
Cost Effective ◽  
Teaching Staff ◽  
Multiple Perspectives ◽  
Adoption Studies ◽  
Cloud Adoption ◽  
Cloud Computing Adoption ◽  
Skilled Personnel

Cloud computing has become a major talking point in recent times. An innovation such as cloud computing for higher education institutions (HEI) can be a cost effective means to operate their IT systems effectively without having to spend vast amounts of money on developing their IT infrastructure. HEIs also face the burden of several challenges e.g. limited infrastructure resources and IT budget, as well as limited teaching staff, technical experts, and IT skilled personnel. With support from a systematic literature review approach, this article identifies the key determinants of cloud adoption from a technological, organisational, environmental and personal perspectives. A total of 17 cloud adoption studies in the HEI context and their respected models from the period of 2012 to 2017 are reviewed and discussed. The findings suggest a lack of cloud adoption studies in the HEI domain from multiple perspectives, particularly in relation to the wider socio-technical concerns related to cloud adoption and future studies related to this research gap are deliberated.

Research on the Frequency Spectrum Management Method of VLF Based on the Propagation Prediction Technology

2014 ◽  
Vol 543-547 ◽  
pp. 2180-2183 ◽  
Author(s):  
Jian Ping Zhou ◽  
Guang Ming Li
Keyword(s):  
Signal To Noise Ratio ◽  
Effective Means ◽  
Spectrum Management ◽  
Predicting Model ◽  
Atmospheric Noise ◽  
Communication Frequency ◽  
Propagation Prediction ◽  
Noise Statistics ◽  
Relationship Of ◽  
The Relationship

VLF communication is one of the most effective means to command underwater platform. The spectrum resource of vlf communication is limited, so it is very important for enhance the reliability of vlf communication to strengthen the vlf communication spectrum management. It makes use of the well prediction of the vlf frequency band, to establish the signal field predicting model and atmospheric noise statistics predicting model respectively, predicts the field of signal and noise level, and then calculated the signal-to-noise ratio (SNR). According to the SNR distribution we can determine the relationship of the optimal communication frequency, time and location of receiver. So the efficiency of spectrum management for vlf communication can be enhanced.

Why there have been so few spectrum trades in the UK: lessons for Europe

Info ◽  
2010 ◽  
Vol 12 (1) ◽  
pp. 10-17 ◽  
Author(s):  
Rajen Akalu
Keyword(s):  
Real World ◽  
Spectrum Management ◽  
Reform Process ◽  
Ceteris Paribus ◽  
Empirical Observation ◽  
Content Type ◽  
Management Reform ◽  
Regulatory Decision ◽  
Frequency Management ◽  
The Uk

PurposeThis paper seeks to define a coherent management preference function for determining the conditions when the market can be effectively used in the management of spectrum based on abduction and volitional pragmatism.Design/methodology/approachVolitional pragmatism based on the logic of abduction is used to provide an explanation for real world empirical observation of few spectrum trades in the UK. This is generalized for application with wider context of European frequency management.FindingsThere has been a considerable regulatory effort directed toward spectrum trading in the EU. The UK experience with trading is clearly not what was expected. It was suggested that this is a result of an analytical approach based on deductive validationism subject to ceteris paribus assumptions. This approach does have merit but its application is over extended. This is due in large part institutional under specification of what constitutes the market and the nature of the transaction taking place.Research limitations/implicationsThe emphasis is in this paper is on the explanation of real world facts rather than normative prescription based on deductive validationism. Such an approach though fallible (all facts cannot be taken into account) is no less valuable in the process of regulatory decision making than deductive validationism.Practical implicationsThis paper provides a more coherent explanation of spectrum development and the spectrum management reform process.Originality/valueA set of conditions are provided for determining when the market can be used in the management of spectrum. This makes explicit the intended operation of the market as well as its limitations.

Videos With Integrated AAC Visual Scene Displays to Enhance Participation in Community and Vocational Activities: Pilot Case Study With an Adolescent With Autism Spectrum Disorder

2017 ◽  
Vol 2 (12) ◽  
pp. 55-69 ◽  
Author(s):  
Tara O'Neill ◽  
Janice Light ◽  
David McNaughton
Keyword(s):  
Autism Spectrum Disorder ◽  
Real World ◽  
Effective Means ◽  
Autism Spectrum ◽  
Spectrum Disorder ◽  
Visual Scene ◽  
Task Completion ◽  
Complex Communication Needs ◽  
Communication Needs

In order to maximize the positive outcomes of augmentative and alternative communication interventions, it is critical that interventions support the participation of individuals with complex communication needs within real-world interactions in their natural environments. A pilot case study was used to evaluate the effects of videos with integrated visual scene displays (VSDs), displayed on a tablet-based application (app), on the percent of task steps completed independently within three community and vocational activities by an adolescent with autism spectrum disorder (ASD). The results indicated noticeable gains in independent task completion and communication across contexts while using the video VSD app after only a few intervention sessions. These results provide preliminary evidence that videos with integrated VSDs may serve as an effective means to maximize independent participation and communication for individuals with complex communication needs and ASD in real-world contexts. Ultimately, this assistive technology could reduce dependence on aides (e.g., job coaches, paraprofessionals) and create increased opportunities for employment and independent participation in meaningful community activities for individuals with complex communication needs.

A software-defined wireless networking enabled spectrum management architecture

2016 ◽  
Vol 54 (1) ◽  
pp. 33-39 ◽  
Author(s):  
Wei Wang ◽  
Yingjie Chen ◽  
Qian Zhang ◽  
Tao Jiang
Keyword(s):  
Wireless Networking ◽  
Spectrum Management ◽  
Management Architecture

scholarly journals Maps in video games – range of applications

2015 ◽  
Vol 47 (3) ◽  
pp. 137-145 ◽  
Author(s):  
Dominika Chądzyńska ◽  
Dariusz Gotlib
Keyword(s):  
Video Games ◽  
Real World ◽  
Effective Means ◽  
Data Reliability ◽  
The Moment ◽  
Means Of Transmission ◽  
Positive Effect ◽  
Implementation Activity ◽  
Advanced Visualization

Abstract The authors discuss the role of the map in various game genres, specifically video games. Presented examples illustrate widespread map usage in various ways and forms by the authors of games, both classic and video. The article takes a closer look at the classification and development of video games within the last few decades. Presently, video games use advanced geospatial models and data resources. Users are keen on a detailed representation of the real world. Game authors use advanced visualization technologies, which often are innovative and very attractive. Joint efforts of cartographers, geo-information specialists and game producers can bring interesting effects in the future. Although games are mainly made for entertainment, they are more frequently used for other purposes. There is a growing need for data reliability as well as for some effective means of transmission cartographic content. This opens up a new area of both scientific and implementation activity for cartographers. There is no universally accessible data on the role of cartographers in game production, but apparently it is quite limited at the moment. However, a wider application of cartographic methodology would have a positive effect on the development of games and, conversely, methods and technologies applied by game makers can influence the development of cartography.

3D-point-cloud registration and real-world dynamic modelling-based virtual environment building method for teleoperation

Robotica ◽  
2016 ◽  
Vol 35 (10) ◽  
pp. 1958-1974 ◽  
Author(s):  
Dejing Ni ◽  
Aiguo Song ◽  
Xiaonong Xu ◽  
Huijun Li ◽  
Chengcheng Zhu ◽  
...  
Keyword(s):  
Virtual Environment ◽  
Real World ◽  
Point Cloud ◽  
Effective Means ◽  
Dynamic Modelling ◽  
Least Square ◽  
Human Operator ◽  
3D Point Cloud ◽  
Point Cloud Registration ◽  
Registration Method

SUMMARYIt is a challenging task for a human operator to manipulate a robot from a remote distance, especially in an unknown environment. Excellent teleoperation provides the human operator with a sense of telepresence, mainly including real-world vision, haptic perception, etc. This paper presents a novel virtual environment building method using the red–green–blue (RGB) colour information, the surface normal feature-based 3D-point-cloud registration method and the weighted sliding-average least-square-method-based real-world dynamic modelling for teleoperation. The experiments prove the method to be an accurate and effective means of teleoperation.

Interprofessional and Interdisciplinary Learning

2010 ◽  
pp. 1-13 ◽  
Author(s):  
Steve Smith ◽  
Lynn Clouder
Keyword(s):  
Real World ◽  
Boundary Crossing ◽  
Multiple Perspectives ◽  
Interdisciplinary Learning ◽  
The Real ◽  
Optimal Outcomes ◽  
Collaborative Education

This chapter begins by considering the words used to discuss collaborative education. Although it can be argued that “practice” separates “a profession” from “a discipline”, the merit in separating theory from practice is highly questionable. The literature suggests that the challenges to interprofessional and interdisciplinary learning are very similar, for example, the “silo” mentality causes problems within both. In addition, it is evident that the reasons behind advocacy of interprofessional and interdisciplinary learning are also similar. The chapter demonstrates that successful interprofessional and interdisciplinary learning requires fundamental changes to both the curriculum and the organisation delivering it. The authors conclude that while subtle differences might exist between interprofessional and interdisciplinary learning their promotion is based on a similar rationale, which is to ensure that students are prepared for the real world in which collaboration, boundary crossing, adopting multiple perspectives and working with others to achieve optimal outcomes, is paramount.

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