scholarly journals Vibration Performance Redistribution in Heterogeneous Networks

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Genling Huang ◽  
Jiqiang Wang
Keyword(s):  
Complex Networks ◽  
Heterogeneous Networks ◽  
Technological Development ◽  
Collective Behaviors ◽  
The Past ◽  
Performance Distribution ◽  
Recent Technological Development ◽  
Vibration Performance

Collective behaviors such as synchronization, consensus, and flocking have been extensively investigated over the past decades. Many important results have been disseminated concerning the properties of complex networks. Recent technological development requires performance distribution, and this motivates the resolution to the issue of performance distributability. Albeit in a simple setup, this paper presents an attempt to attacking this problem. Important results are obtained for performance redistribution under both unitary and specified specifications. Constraints are also considered revealing the tight bounds on both nodes dynamics and graph elements for fulfilling the performance distribution and redistribution requirements. Examples are presented for verification of the claims.

scholarly journals Life Cycle Assessment and Material Flow Analysis: Two Under-Utilized Tools for Informing E-Waste Management

2021 ◽  
Vol 13 (14) ◽  
pp. 7939
Author(s):  
Sohani Vihanga Withanage ◽  
Komal Habib
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Material Flow ◽  
Keyword Search ◽  
Technological Development ◽  
Flow Analysis ◽  
Material Flow Analysis ◽  
Civil Society Organizations ◽  
The Past ◽  
Depth Analysis

The unprecedented technological development and economic growth over the past two decades has resulted in streams of rapidly growing electronic waste (e-waste) around the world. As the potential source of secondary raw materials including precious and critical materials, e-waste has recently gained significant attention across the board, ranging from governments and industry, to academia and civil society organizations. This paper aims to provide a comprehensive review of the last decade of e-waste literature followed by an in-depth analysis of the application of material flow analysis (MFA) and life cycle assessment (LCA), i.e., two less commonly used strategic tools to guide the relevant stakeholders in efficient management of e-waste. Through a keyword search on two main online search databases, Scopus and Web of Science, 1835 peer-reviewed publications were selected and subjected to a bibliographic network analysis to identify and visualize major research themes across the selected literature. The selected 1835 studies were classified into ten different categories based on research area, such as environmental and human health impacts, recycling and recovery technologies, associated social aspects, etc. With this selected literature in mind, the review process revealed the two least explored research areas over the past decade: MFA and LCA with 33 and 31 studies, respectively. A further in-depth analysis was conducted for these two areas regarding their application to various systems with numerous scopes and different stages of e-waste life cycle. The study provides a detailed discussion regarding their applicability, and highlights challenges and opportunities for further research.

scholarly journals Data-driven control of complex networks

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Giacomo Baggio ◽  
Danielle S. Bassett ◽  
Fabio Pasqualetti
Keyword(s):  
Complex Networks ◽  
Network Dynamics ◽  
Noisy Data ◽  
Data Driven ◽  
Control Algorithms ◽  
Optimal Controls ◽  
Network Systems ◽  
The Past ◽  
Efficient Control ◽  
Finite Set

AbstractOur ability to manipulate the behavior of complex networks depends on the design of efficient control algorithms and, critically, on the availability of an accurate and tractable model of the network dynamics. While the design of control algorithms for network systems has seen notable advances in the past few years, knowledge of the network dynamics is a ubiquitous assumption that is difficult to satisfy in practice. In this paper we overcome this limitation, and develop a data-driven framework to control a complex network optimally and without any knowledge of the network dynamics. Our optimal controls are constructed using a finite set of data, where the unknown network is stimulated with arbitrary and possibly random inputs. Although our controls are provably correct for networks with linear dynamics, we also characterize their performance against noisy data and in the presence of nonlinear dynamics, as they arise in power grid and brain networks.

scholarly journals The Reversing Paging Process of Callee in Heterogeneous Networks

2011 ◽  
Vol 1 ◽  
pp. 3-8
Author(s):  
Cong Zhao ◽  
Wei Guo
Keyword(s):  
Heterogeneous Networks ◽  
Mobility Management ◽  
Heterogeneous Network ◽  
Vertical Handoff ◽  
The Past ◽  
The Future ◽  
Wireless Signal ◽  
Set Up

To achieve the goal that anybody could communicate with anyone at anytime in anyplace and in anyway, many technologies, such as GSM、CDMA、WCDMA、CDMA2000、TD-SCDMA、802.11a/b/g and so on, come true in the past years. And now, many B3G or 4G technologies are being studied. It is well-known that the future network would be heterogeneous networks. It is studied in this paper the mobility management of wireless heterogeneous network and a reversing paging process of callee is proposed which integrates paging and handoff. In the process when the caller pages the callee choosing its best suited network on one end, the callee chooses its own best network to begin a reversing paging process to set up the communication. The simulation tells that the proposed process has better performances in the call delay, the call succeeding rate and the wireless signal cost than that of the existing process in which it sets up the call first and then does vertical handoff independently.

scholarly journals Counterfactuality as a Polyphonic Assemblage. Entangled Human and Nonhuman Stories of Early Modern Sciences in Neal Stephenson’s The Baroque Cycle

2018 ◽  
Vol 14 (1) ◽  
pp. 110-121
Author(s):  
Mateusz Chaberski
Keyword(s):  
Science Fiction ◽  
Technological Development ◽  
Vital Role ◽  
Multispecies Ethnography ◽  
The Past ◽  
Political Effects ◽  
Neal Stephenson ◽  
History Of ◽  
Ways Of Being ◽  
Point Of Departure

Summary In recent science-fiction literature, we can witness a proliferation of new counterfactual narratives which take the 17th century as their point of departure. Unlike steampunk narratives, however, their aim is not to criticise the socio-political effects caused by contemporary technological development. Such authors as Neal Stephenson or Ian Tregillis, among others, are interested in revisiting the model of development in Western societies, routing around the logic of progress. Moreover, they demonstrate that modernity is but an effect of manifold contingent and indeterminate encounters of humans and nonhumans and their distinct temporalities. Even the slightest modification of their ways of being could have changed Western societies and cultures. Thus, they necessitate a rather non-anthropocentric model of counterfactuality which is not tantamount to the traditional alternative histories which depart from official narratives of the past. By drawing on contemporary multispecies ethnography, I put forward a new understanding of counter-factuality which aims to reveal multiple entangled human and nonhuman stories already embedded in the seemingly unified history of the West. In this context, the concept of “polyphonic assemblage” (Lowenhaupt-Tsing) is employed to conceptualize the contingent and open-ended encounters of human and nonhuman historical actors which cut across different discourses and practices. I analyse Stephenson’s The Baroque Cycle to show the entangled stories of humans and nonhumans in 17th century sciences, hardly present in traditional historiographies. In particular, Stephenson’s depiction of quicksilver and coffeehouse as nonhuman historical actors is scrutinized to show their vital role in the production of knowledge at the dawn of modernity.

scholarly journals The phenomenon of signed music in Deaf culture

2021 ◽  
Vol 20 (4) ◽  
pp. 259-271
Author(s):  
Marina Radić-Šestić ◽  
Mia Šešum ◽  
Ljubica Isaković
Keyword(s):  
Technological Development ◽  
Deaf Culture ◽  
Past Century ◽  
Deaf Community ◽  
The Past ◽  
Art Form ◽  
Cultural Frameworks ◽  
Musical Perception ◽  
Musical Elements

Introduction. Music in the Deaf community is a socio-cultural phenomenon that depicts a specific identity and way of experiencing the world, which is just as diverse, rich and meaningful as that of members of any other culture. Objective. The aim of this paper was to point out the historical and socio-cultural frameworks, complexity, richness, specific elements, types and forms of musical expression of members of the Deaf community. Methods. The applied methods included comparative analysis, evaluation, and deduction and induction system. Results. Due to limitations or a lack of auditive component, the members of Deaf culture use different communication tools, such as speech, pantomime, facial expressions and sign language. Signed music, as a phenomenon, is the artistic form which does not have long history. However, since the nineties of the past century and with technological development, it has been gaining greater interest and acknowledgement within the Deaf community and among the hearing audience. Signed music uses specific visuo-spatial-kinaesthetic and auditive elements in expression, such as rhythm, dynamism, rhyme, expressiveness, iconicity, intensity of the musical perception and the combination of the role of the performer. Conclusion. Signed music as a phenomenon is an art form that incorporates sign poetic characteristics (lyrical contents), visual musical elements and dance.

scholarly journals Antropologia Virtual: novas metodologias para a análise morfológica e funciona

2020 ◽  
pp. 311-323
Author(s):  
Ricardo Manuel Godinho ◽  
Célia Gonçalves
Keyword(s):  
Mechanical Performance ◽  
Technological Development ◽  
Linear Measurements ◽  
Skeletal Morphology ◽  
The Past ◽  
New Approaches ◽  
Morphological Differences ◽  
Virtual Anthropology

Bioanthropology examines skeletal morphology to infer diverse aspects of the funerary behaviour and palaeobiology of past populations. Conventional morphological metric (morphometrics) analysis has typically used linear measurements, ratios and angles. Yet, such quantifications do not allow visualization of the morphological differences nor prediction of the mechanical performance of bones (which may induce morphological differences between populations with diverse behaviours). Virtual Anthropology, which musters several techniques deriving from the exponential technological development of the past decades, provides new approaches to the analysis and understanding of the examined populations. Here, we summarize the techniques used in Virtual Anthropology and how this discipline may augment our understanding of the populations under study.

Musique Concrètization

2011 ◽  
pp. 125-139
Author(s):  
Jean Hébert
Keyword(s):  
Popular Music ◽  
Heterogeneous Networks ◽  
Social Reproduction ◽  
Music Technology ◽  
The Past ◽  
Critical Theories ◽  
The People ◽  
The Social ◽  
Music Distribution ◽  
And Control

For the past several years, a crisis over copyright and control of music distribution has been developing. The outcome of this crisis has tremendous implications not only for the fate of commercial and creative entities involved in music, but for the social reproduction of knowledge and culture more generally. Critical theories of technology are useful in addressing these implications. This chapter introduces the concept of “concretization” (Feenberg, 1999), and demonstrates how it can be mapped onto the field of current music technologies and the lives and work of the people using them. This reading of popular music technologies resonates strongly with themes arising out of current scholarship covering the crisis of copyright and music distribution. Reading music technology in this way can yield a lucid account of the diverse trajectories and goals inherent in heterogeneous networks of participants involved with music technologies. It can also give us not only a detailed description of the relations of various groups, individuals, and technologies involved in networks of music, but also a prescriptive program for the future maintenance and strengthening of a vibrant, perhaps less intensively commercialized, and radically democratized sphere of creative exchange.

Proposing a Regional Normative Framework for Limiting the Potential for Unintentional or Escalatory Engagements with Increasingly Autonomous Weapon Systems

2021 ◽  
pp. 259-272
Author(s):  
Austin Wyatt ◽  
Jai Galliott
Keyword(s):  
Technological Development ◽  
Autonomous Systems ◽  
Southeast Asian ◽  
Regional Security ◽  
Systems Modeling ◽  
Weapon Systems ◽  
The Past ◽  
Normative Framework ◽  
Conventional Weapons

While the Conference on Certain Conventional Weapons (CCW)-sponsored process has steadily slowed, and occasionally stalled, over the past five years, the pace of technological development in both the civilian and military spheres has accelerated. In response, this chapter suggests the development of a normative framework that would establish common procedures and de-escalation channels between states within a given regional security cooperative prior to the demonstration point of truly autonomous weapon systems. Modeling itself on the Guidelines for Air Military Encounters and Guidelines Maritime Interaction, which were recently adopted by the Association of Southeast Asian Nations, the goal of this approach is to limit the destabilizing and escalatory potential of autonomous systems, which are expected to lower barriers to conflict and encourage brinkmanship while being difficult to definitively attribute. Overall, this chapter focuses on evaluating potential alternatives avenues to the CCW-sponsored process by which ethical, moral, and legal concerns raised by the emergence of autonomous weapon systems could be addressed.

scholarly journals Understanding preservation and identification biases of ancient adhesives through experimentation

2020 ◽  
Vol 12 (9) ◽  
Author(s):  
Paul R. B. Kozowyk ◽  
Annelou L. van Gijn ◽  
Geeske H. J. Langejans
Keyword(s):  
Early Modern ◽  
Technological Development ◽  
Climatic Conditions ◽  
The Past ◽  
Elapsed Time ◽  
Research Bias ◽  
Before And After ◽  
Adhesive Materials ◽  
Different Soils ◽  
Taphonomic Processes

Abstract Adhesive production is one of the earliest forms of transformative technology, predating ceramics and metallurgy by over 150,000 years. The study of the adhesives used by Neandertals and early modern humans currently plays a significant role in debates about human technological and cognitive evolution. Depending on the type of adhesive used, different production sequences were required. These can vary in complexity and would have needed different knowledge, expertise, and resources to manufacture. However, our knowledge of this important technological development is severely hampered by poorly understood taphonomic processes, which affects the preservation and identification of adhesive materials and leads to a research bias. Here we present the results from a 3-year field preservation experiment. Flint flakes hafted and non-hafted with replica adhesives were left to weather naturally on and below the surface at two locations with different soils and climatic conditions. Differential preservation was recorded on a variety of natural adhesives by digitally measuring the surface area of each residue before and after the elapsed time. Residues were further assessed and photographed using metallographic optical microscopy. Results show that certain adhesives preserve to a significantly higher degree than others, while some materials may be more easily overlooked or visually misdiagnosed. We must therefore be aware of both taphonomic and identification biases when discussing ancient adhesive technology. This research provides a first look that will help us understand the disparities between which adhesives were used in the past and what we find in the archaeological record today.

scholarly journals A Decade with VAMDC: Results and Ambitions

Atoms ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 76 ◽  
Author(s):  
Damien Albert ◽  
Bobby K. Antony ◽  
Yaye Awa Ba ◽  
Yuri L. Babikov ◽  
Philippe Bollard ◽  
...  
Keyword(s):  
Data Management ◽  
International Cooperation ◽  
Technological Development ◽  
Molecular Data ◽  
Heterogeneous Data ◽  
Current Status ◽  
Data Centre ◽  
The Past ◽  
User Communities

This paper presents an overview of the current status of the Virtual Atomic and Molecular Data Centre (VAMDC) e-infrastructure, including the current status of the VAMDC-connected (or to be connected) databases, updates on the latest technological development within the infrastructure and a presentation of some application tools that make use of the VAMDC e-infrastructure. We analyse the past 10 years of VAMDC development and operation, and assess their impact both on the field of atomic and molecular (A&M) physics itself and on heterogeneous data management in international cooperation. The highly sophisticated VAMDC infrastructure and the related databases developed over this long term make them a perfect resource of sustainable data for future applications in many fields of research. However, we also discuss the current limitations that prevent VAMDC from becoming the main publishing platform and the main source of A&M data for user communities, and present possible solutions under investigation by the consortium. Several user application examples are presented, illustrating the benefits of VAMDC in current research applications, which often need the A&M data from more than one database. Finally, we present our vision for the future of VAMDC.

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