Reliable design: a system perspective [Tutorial]

2005 ◽  
Author(s):  
G. De Micheli ◽  
R. Iyer
Keyword(s):  
System Perspective ◽  
Reliable Design

ON SOME PROBLEMS OF RELIABLE DESIGN OF ONBOARD REM

2017 ◽  
Author(s):  
S. I. Frolov ◽  
◽  
N. V. Goryachev ◽  
G. V. Tan’kov ◽  
I. I. Kochegarov ◽  
...  
Keyword(s):  
Reliable Design

Organizational Learning and Multiteam Systems

2019 ◽  
pp. 602-620
Author(s):  
Leslie A. DeChurch ◽  
Gina M. Bufton ◽  
Sophie A. Kay ◽  
Chelsea V. Velez ◽  
Noshir Contractor
Keyword(s):  
Organizational Learning ◽  
Knowledge Transfer ◽  
Knowledge Creation ◽  
Learning Processes ◽  
Organizational Systems ◽  
System Perspective ◽  
Multiteam Systems ◽  
Starting Point ◽  
Emergent States ◽  
Superordinate Goal

Multiteam systems consist of two or more teams, each of which pursues subordinate team goals, while working interdependently with at least one other team toward a superordinate goal. Many teams work in these larger organizational systems, where oft-cited challenges involve learning processes within and between teams. This chapter brings a learning perspective to multiteam systems and a multiteam system perspective to organizational learning. Several classic illustrations of organizational learning—for example, the Challenger and Columbia disasters—actually point to failures in organizational learning processes within and between teams. We offer the focus on intrateam knowledge creation and retention and interteam knowledge transfer as a useful starting point for thinking about how to conceptually and operationally define learning in multiteam systems. Furthermore, we think leadership structures and multiteam emergent states are particularly valuable drivers of learning.

scholarly journals Potential Well in Poincaré Recurrence

Entropy ◽  
2021 ◽  
Vol 23 (3) ◽  
pp. 379
Author(s):  
Miguel Abadi ◽  
Vitor Amorim ◽  
Sandro Gallo
Keyword(s):  
Dynamical System ◽  
Dynamical Systems ◽  
Stochastic Processes ◽  
Recurrence Time ◽  
Potential Well ◽  
Exponential Approximation ◽  
Mixing Processes ◽  
System Perspective ◽  
Return Times ◽  
Error Terms

From a physical/dynamical system perspective, the potential well represents the proportional mass of points that escape the neighbourhood of a given point. In the last 20 years, several works have shown the importance of this quantity to obtain precise approximations for several recurrence time distributions in mixing stochastic processes and dynamical systems. Besides providing a review of the different scaling factors used in the literature in recurrence times, the present work contributes two new results: (1) For ϕ-mixing and ψ-mixing processes, we give a new exponential approximation for hitting and return times using the potential well as the scaling parameter. The error terms are explicit and sharp. (2) We analyse the uniform positivity of the potential well. Our results apply to processes on countable alphabets and do not assume a complete grammar.

scholarly journals Scaling capacity of fiber-optic transmission systems via silicon photonics

Nanophotonics ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Wei Shi ◽  
Ye Tian ◽  
Antoine Gervais
Keyword(s):  
Silicon Photonics ◽  
Communication Systems ◽  
Large Scale ◽  
Recent Progress ◽  
Fiber Optic ◽  
Rapid Evolution ◽  
System Capacity ◽  
Disruptive Technology ◽  
System Perspective ◽  
Silicon Photonic

AbstractThe tremendous growth of data traffic has spurred a rapid evolution of optical communications for a higher data transmission capacity. Next-generation fiber-optic communication systems will require dramatically increased complexity that cannot be obtained using discrete components. In this context, silicon photonics is quickly maturing. Capable of manipulating electrons and photons on the same platform, this disruptive technology promises to cram more complexity on a single chip, leading to orders-of-magnitude reduction of integrated photonic systems in size, energy, and cost. This paper provides a system perspective and reviews recent progress in silicon photonics probing all dimensions of light to scale the capacity of fiber-optic networks toward terabits-per-second per optical interface and petabits-per-second per transmission link. Firstly, we overview fundamentals and the evolving trends of silicon photonic fabrication process. Then, we focus on recent progress in silicon coherent optical transceivers. Further scaling the system capacity requires multiplexing techniques in all the dimensions of light: wavelength, polarization, and space, for which we have seen impressive demonstrations of on-chip functionalities such as polarization diversity circuits and wavelength- and space-division multiplexers. Despite these advances, large-scale silicon photonic integrated circuits incorporating a variety of active and passive functionalities still face considerable challenges, many of which will eventually be addressed as the technology continues evolving with the entire ecosystem at a fast pace.

scholarly journals Sustainability Evaluation on the Grain to Green Program in the Hexi Corridor of China: A Metacoupled System Perspective

2021 ◽  
Vol 13 (3) ◽  
pp. 1498
Author(s):  
Jian Zhang ◽  
Tao Tian ◽  
Jinying Cui ◽  
Gordon M. Hickey ◽  
Rui Zhou ◽  
...  
Keyword(s):  
Hexi Corridor ◽  
Gansu Province ◽  
Natural System ◽  
Ecological Benefits ◽  
System Perspective ◽  
The Social ◽  
Economic Transformations ◽  
Labor Transfer ◽  
Ancient Silk Road ◽  
First Time

Most previous studies aim to predict ecosystem sustainability from the perspective of a sole human or natural system and have frequently failed to achieve their desired outcome. Based on the coupled human and natural system (CHANS) and its interaction with other systems, we attempted to analyze the effectiveness of the Grain to Green Program and predict future trends in the Hexi Corridor, the hub of the ancient silk road of China. At different scales, we applied a metacoupling framework to investigate the flows, effects, and causes of the complex CHANS. Three typical inner river watersheds within the corridor at three different geographic scales (local, regional and national) were estimated and compared. The Telecoupling Geo App, additional models, and software tools were employed to evaluate the CHANS series of the focal system (Hexi Corridor, local), adjacent system (Gansu Province, regional), and distant system (China, national). The results showed that most flows can be screened and quantitatively analyzed across focal, adjacent and distant systems. The social and economic transformations in adjacent and distant systems could affect the possibility and whereabouts of labor transfer in the focal system. Moreover, the labor migration increased the implementation efficiency of the Grain to Green Program as a Payment for Ecosystem Services (PES) strategy, thereby improving its ecological benefits. For the first time, we established a metacoupled model to quantitatively evaluate aspects of ecosystem sustainability in China, providing insight to the theory and application of sustainability science.

PP329 An Australian Cost-Effectiveness Analysis Of The EluviaTM Drug-Eluting Stent For Treatment Of Symptomatic Lower-Limb Peripheral Artery Disease

2020 ◽  
Vol 36 (S1) ◽  
pp. 28-29
Author(s):  
William A. Gray ◽  
Thathya V. Ariyaratne ◽  
Robert I. Griffiths ◽  
Peter W.M. Elroy ◽  
Stacey L. Amorosi ◽  
...  
Keyword(s):  
Cost Effectiveness ◽  
Healthcare System ◽  
Lower Limb ◽  
Sensitivity Analyses ◽  
Public Healthcare ◽  
System Perspective ◽  
Healthcare System Perspective ◽  
Drug Eluting ◽  
Zilver Ptx ◽  
Cost Parameters

IntroductionDespite advances in endovascular interventions, including the introduction of drug-eluting stents (DES), high target lesion revascularization (TLR) rates still burden the treatment of symptomatic lower-limb peripheral arterial disease (PAD). EluviaTM, a novel, sustained-release, paclitaxel-eluting DES, was shown to further reduce TLRs when compared with the paclitaxel-coated Zilver® PTX® stent, in the IMPERIAL randomized controlled trial. This evaluation estimated the cost-effectiveness of Eluvia when compared with Zilver PTX in Australia, based on 12-month clinical outcomes from the IMPERIAL trial.MethodsA state-transition, decision-analytic model with a 12-month time horizon was developed from an Australian public healthcare system perspective. Cost parameters were obtained from the Australian National Hospital Cost Data Collection Cost Report (2016–17). All costs were captured in Australian dollars (AUD), where AUD 1 = USD 0.69 (June 2020). Complete sets of clinical parameters (primary patency loss, TLR, amputation, and death) and cost parameters from their respective distributions were bootstrapped in samples of 1,000 patients, for each intervention arm of the model. One-way and probabilistic sensitivity analyses were performed.ResultsAt 12 months, modeled TLR rates were 4.5 percent for Eluvia and 8.9 percent for Zilver PTX, and mean total direct costs were AUD 6,537 [USD 4,511] and AUD 6,908 [USD 4,767], respectively (Eluvia average per patient savings; overall cohort=AUD 371 [USD 256]; diabetic cohort=AUD 625 [USD 431]). In probabilistic sensitivity analyses, Eluvia was cost-effective relative to Zilver PTX in 92.0 percent of all simulations at a threshold of $10,000 per TLR avoided. Eluvia was more effective and less costly (dominant) than Zilver PTX in 76.0 percent of simulations.ConclusionsIn the first year after the intervention, Eluvia was more effective and less costly than Zilver PTX, making Eluvia the dominant treatment strategy for treatment of symptomatic lower-limb PAD, from an Australian public healthcare system perspective. These findings should be considered when formulating policy and practice guidelines in the context of priority setting and making evidence-based resource allocation decisions for treatment of PAD in Australia.

scholarly journals Informal carer in Portugal: moving towards political recognition in Portugal

2019 ◽  
Vol 29 (Supplement_4) ◽  
Author(s):  
I Fronteira ◽  
J Simoes ◽  
G Augusto
Keyword(s):  
Informal Care ◽  
Long Term Care ◽  
Well Being ◽  
Oecd Countries ◽  
Low Fertility ◽  
Informal Carer ◽  
Term Care ◽  
System Perspective ◽  
Informal Carers

Abstract Informal care represents around 80% of all long term care provided in EU countries. Nevertheless, the needs for this type of care are expected to increase in the coming years in all OECD countries. Portugal is among the OECD countries with the highest ageing index (21.5% of the population was older than 65 years in 2017) due to high life expectancy and low fertility rates. As this demographic trend establishes, Portugal is expected to have more than 40% of the population over 65 years in 2037, and the expected prevalence of dementia is 3%, in 2050. In 2015 there were 2.1% of people over 65 receiving long-term care, representing 52% of all long-term care users. Around 38% were receiving care at home. It is estimated that 287,000 people in Portugal depend on informal carers. The agenda towards the official recognition of informal cares has been push forward in the country. Since 2015, several recommendations have been issued by the Parliament as well as legislative initiatives and a proposal for a Status of the Informal Carer is currently under discussion. We analyse the process of formulation of this policy in terms of sectors and stakeholders involved, definition and scope of informal carer, rights and obligations, role of the person being cared for, formal protection (e.g., labor, social, financial, training) and implementation. Recognition of the informal carer is a sector wide approach. One of the main features is the economic, social and labor protection mainly through reconciliation between work life and caring activities and promotion of the carer’s well being. Notwithstanding, and from a health system perspective, community health teams are to be the focal point for informal carers, supporting and providing specific training whenever needed. Despite its relevance, informal care should not be professionalized and responsibility of care should not be shifted from health services to informal carers. Key messages Needs for informal care are expected to increase in the coming years in OECD countries. Recognition of the informal carer is a sector wide approach.

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