On Controlling Elasticity of Cloud Applications in CELAR

2015 ◽  
pp. 222-252 ◽  
Author(s):  
Georgiana Copil ◽  
Daniel Moldovan ◽  
Hung Duc Le ◽  
Hong-Linh Truong ◽  
Schahram Dustdar ◽  
...  
Keyword(s):  
Control Mechanisms ◽  
Quality Performance ◽  
Control Approach ◽  
Multiple Components ◽  
Cloud Environments ◽  
Multi Level ◽  
The Cost ◽  
User Friendly ◽  
And Control ◽  
Cloud Applications

Today's complex cloud applications are composed of multiple components executed in multi-cloud environments. For such applications, the possibility to manage and control their cost, quality, and resource elasticity is of paramount importance. However, given that the cost of different services offered by cloud providers can vary a lot with their quality/performance, elasticity controllers must consider not only complex, multi-dimensional preferences and provisioning capabilities from stakeholders but also various runtime information regarding cloud applications and their execution environments. In this chapter, the authors present the elasticity control approach of the EU CELAR Project, which deals with multi-dimensional elasticity requirements and ensures multi-level elasticity control for fulfilling user requirements. They show the elasticity control mechanisms of the CELAR project, from application description to multi-level elasticity control. The authors highlight the usefulness of CELAR's mechanisms for users, who can use an intuitive, user-friendly interface to describe and then to follow their application elasticity behavior controlled by CELAR.

On Controlling Elasticity of Cloud Applications in CELAR

2016 ◽  
pp. 1937-1967
Author(s):  
Georgiana Copil ◽  
Daniel Moldovan ◽  
Hung Duc Le ◽  
Hong-Linh Truong ◽  
Schahram Dustdar ◽  
...  
Keyword(s):  
Control Mechanisms ◽  
Quality Performance ◽  
Control Approach ◽  
Multiple Components ◽  
Cloud Environments ◽  
Multi Level ◽  
The Cost ◽  
User Friendly ◽  
And Control ◽  
Cloud Applications

Today's complex cloud applications are composed of multiple components executed in multi-cloud environments. For such applications, the possibility to manage and control their cost, quality, and resource elasticity is of paramount importance. However, given that the cost of different services offered by cloud providers can vary a lot with their quality/performance, elasticity controllers must consider not only complex, multi-dimensional preferences and provisioning capabilities from stakeholders but also various runtime information regarding cloud applications and their execution environments. In this chapter, the authors present the elasticity control approach of the EU CELAR Project, which deals with multi-dimensional elasticity requirements and ensures multi-level elasticity control for fulfilling user requirements. They show the elasticity control mechanisms of the CELAR project, from application description to multi-level elasticity control. The authors highlight the usefulness of CELAR's mechanisms for users, who can use an intuitive, user-friendly interface to describe and then to follow their application elasticity behavior controlled by CELAR.

scholarly journals Modeling of interaction between shareholders and control bodies

2021 ◽  
Vol 12 (1) ◽  
pp. 132-143
Author(s):  
Alina K. Davletova ◽  
Elena P. Rostova
Keyword(s):  
Economic Effect ◽  
Numerical Data ◽  
Scientific Basis ◽  
External Control ◽  
Financial Control ◽  
Joint Stock Company ◽  
Control Mechanisms ◽  
Stock Company ◽  
The Cost ◽  
And Control

The article deals with the problem of organization of financial control procedures for the activities of a joint-stock company by the audit bodies. The development of effective verification mechanisms can significantly reduce the cost of conducting them and increase their effectiveness. One of the problems that arise in the study of such problems is the modeling of behavior of participants in the system of internal and external control. The solution of this problem is impossible without the use on a scientific basis of economic and mathematical models of financial control mechanisms, taking into account the economic relations of the subjects and the object of control, allowing to assess the costs of control and its effectiveness. The article examines the mechanism of interaction between shareholders and control bodies. Models describing this interaction have been developed, as well as the tasks of determining the vector of the planned task of inspections by control bodies have been formulated and solved. The parameters of the verification procedure are determined by the criterion of maximizing the economic effect of the center from conducting inspections by the control bodies. The model uses a multiplicative function of the economic effect of the center on the possession of information on each of the subjects of control. The members of the system are the audit commission, the board of directors and the audit organization. For each participant of the system, target functions are formulated, taking into account information about material remuneration and taking into account alternative income. The developed model is tested on numerical data on the cost of conducting inspections and on alternative income. The results of the calculations illustrate the behavior patterns of the system participants, in particular, the feasibility of paying the full cost of inspections by the center and the implementation of the inspection plan by the control bodies in the appropriate volume.

scholarly journals In the Jungle of the Unregulated: Towards Extra-Legal Regulatory Approaches in Addressing ‘Cybercrime’

2017 ◽  
Vol 17 (1) ◽  
pp. 83-107
Author(s):  
Artur Appazov
Keyword(s):  
Command And Control ◽  
Human Interaction ◽  
Regulatory Regime ◽  
Online Behavior ◽  
Effective Response ◽  
Control Approach ◽  
Legal Model ◽  
The Cost ◽  
Regulatory Powers ◽  
And Control

SummaryAs the incidence and the cost of cybercrime keeps growing, the traditional legal model based on the command-and-control approach to regulation experiences major difficulties in curbing further inflation of the phenomenon. The article argues that the traditional legal approach that grounds its authority in enforcement is a poor option for regulation of online human interaction. By considering alternative avenues in influencing online behavior – community-, competition-, and design-based regulation – the article suggests reconsideration of our public policies and regulatory approaches to cybercrime. In doing so, the article offers a thorough interdisciplinary reflection on the idiosyncrasies of human interaction in network environments and its psychological implications, concluding that other regulatory powers may present more effective response to the problem of cybercrime. The holistic regulatory regime that the article advocates incorporates and coordinates all regulatory powers that exist in our societies in order to address the underlying cause of cybercrime.

Sea Disposal of Sludge – The U.K. Experience

1983 ◽  
Vol 15 (1) ◽  
pp. 77-87 ◽  
Author(s):  
Hugh Fish
Keyword(s):  
Sewage Sludge ◽  
Environmental Damage ◽  
Control Mechanisms ◽  
And Control

A broad summary is made of the U.K. experience in sea-disposal of sewage sludge, embracing operations and effects, and control mechanisms, at disposal authority, national and international levels. The conclusion is reached that U.K. practice, while not perfect and in need of more research, is satisfactory and could be extended without causing environmental damage.

scholarly journals Passive flow control mechanisms with bioinspired flexible blades in cross-flow tidal turbines

2021 ◽  
Vol 62 (5) ◽  
Author(s):  
Stefan Hoerner ◽  
Shokoofeh Abbaszadeh ◽  
Olivier Cleynen ◽  
Cyrille Bonamy ◽  
Thierry Maître ◽  
...  
Keyword(s):  
Turbine Blades ◽  
Cross Flow ◽  
Tidal Energy ◽  
Control Mechanisms ◽  
Passive Flow Control ◽  
Turbine Efficiency ◽  
Tidal Turbines ◽  
Passive Flow ◽  
Axial Turbines ◽  
The Cost

Abstract State-of-the-art technologies for wind and tidal energy exploitation focus mostly on axial turbines. However, cross-flow hydrokinetic tidal turbines possess interesting features, such as higher area-based power density in array installations and shallow water, as well as a generally simpler design. Up to now, the highly unsteady flow conditions and cyclic blade stall have hindered deployment at large scales because of the resulting low single-turbine efficiency and fatigue failure challenges. Concepts exist which overcome these drawbacks by actively controlling the flow, at the cost of increased mechatronical complexity. Here, we propose a bioinspired approach with hyperflexible turbine blades. The rotor naturally adapts to the flow through deformation, reducing flow separation and stall in a passive manner. This results in higher efficiency and increased turbine lifetime through decreased structural loads, without compromising on the simplicity of the design. Graphic abstract

scholarly journals Selective caching: a persistent memory approach for multi-dimensional index structures

2021 ◽  
Author(s):  
Muhammad Attahir Jibril ◽  
Philipp Götze ◽  
David Broneske ◽  
Kai-Uwe Sattler
Keyword(s):  
Main Memory ◽  
Index Structure ◽  
Index Structures ◽  
Cloud Infrastructure ◽  
General Technique ◽  
Persistent Memory ◽  
The Cost ◽  
Cloud Applications ◽  
Memory Layout ◽  
Analytical Index

AbstractAfter the introduction of Persistent Memory in the form of Intel’s Optane DC Persistent Memory on the market in 2019, it has found its way into manifold applications and systems. As Google and other cloud infrastructure providers are starting to incorporate Persistent Memory into their portfolio, it is only logical that cloud applications have to exploit its inherent properties. Persistent Memory can serve as a DRAM substitute, but guarantees persistence at the cost of compromised read/write performance compared to standard DRAM. These properties particularly affect the performance of index structures, since they are subject to frequent updates and queries. However, adapting each and every index structure to exploit the properties of Persistent Memory is tedious. Hence, we require a general technique that hides this access gap, e.g., by using DRAM caching strategies. To exploit Persistent Memory properties for analytical index structures, we propose selective caching. It is based on a mixture of dynamic and static caching of tree nodes in DRAM to reach near-DRAM access speeds for index structures. In this paper, we evaluate selective caching on the OLAP-optimized main-memory index structure Elf, because its memory layout allows for an easy caching. Our experiments show that if configured well, selective caching with a suitable replacement strategy can keep pace with pure DRAM storage of Elf while guaranteeing persistence. These results are also reflected when selective caching is used for parallel workloads.

scholarly journals The Next Normal for Marketing — The Dynamics of a Pandemic, Provisioning Systems, and the Changing Patterns of Daily Life

2021 ◽  
Vol 29 (1) ◽  
pp. 4-14
Author(s):  
Roger A. Layton ◽  
Christine Domegan
Keyword(s):  
Daily Life ◽  
Social Mechanisms ◽  
Individual Values ◽  
Public And Private ◽  
Supply Networks ◽  
Edge Of Chaos ◽  
Self Organized ◽  
Changing Patterns ◽  
Multi Level ◽  
And Control

Pandemics, climate warming, growing inequality, and much more bring crises that change the patterns of daily life in human communities, directly impacting the provisioning systems that form in a community to meet the needs and wants of individuals, groups, and entities for goods, services, experiences, ideas. Provisioning systems sometimes begin as leadership initiated top-down, authoritarian prescriptive supply networks, public and private. Sometimes, they originate as bottom-up, self-organized, innovative, open choice, often informal, exchange based networks, and mostly, over time, they emerge as untidy self-organized multi-level diverse assemblages of both. The diversity of provisioning systems in a community enables crisis resilience, but limits efficiency and control. The provisioning systems that form in these ways are complex, multi-level, non-linear evolutionary systems, often unpredictable, and lacking direction. Balancing a desire for stability and an appetite for diversity, innovation, and change in shaping a provisioning system is like walking a narrow corridor on the edge of chaos. Achieving balance, avoiding slipping into chaos, rests on the management of a set of complex social mechanisms. These embrace delivery mechanisms where value is produced and consumed through complex infrastructures; stakeholder action fields where trust, collaboration, cooperation, compromise, competition, or conflict are in play; technology evolution mechanisms where innovation and the recombination of existing technologies occur at all levels; and value exchange fields where community and individual values shift in response to crisis and change. Recovery from crisis is not an event, it is a complex, continuing process, often unpredictable, often unequal in outcomes, but walking a narrow corridor is episodic, uncertain and in the end possible. This is the next normal for marketing.

scholarly journals Probing the Interactions of Porphyrins with Macromolecules Using NMR Spectroscopy Techniques

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 1942
Author(s):  
Ilche Gjuroski ◽  
Julien Furrer ◽  
Martina Vermathen
Keyword(s):  
Nmr Spectroscopy ◽  
Photophysical Properties ◽  
Optical Methods ◽  
Spectroscopic Techniques ◽  
Control Mechanisms ◽  
Dynamic Information ◽  
Non Covalent Interactions ◽  
And Control ◽  
And Diffusion ◽  
Covalent Interactions

Porphyrinic compounds are widespread in nature and play key roles in biological processes such as oxygen transport in blood, enzymatic redox reactions or photosynthesis. In addition, both naturally derived as well as synthetic porphyrinic compounds are extensively explored for biomedical and technical applications such as photodynamic therapy (PDT) or photovoltaic systems, respectively. Their unique electronic structures and photophysical properties make this class of compounds so interesting for the multiple functions encountered. It is therefore not surprising that optical methods are typically the prevalent analytical tool applied in characterization and processes involving porphyrinic compounds. However, a wealth of complementary information can be obtained from NMR spectroscopic techniques. Based on the advantage of providing structural and dynamic information with atomic resolution simultaneously, NMR spectroscopy is a powerful method for studying molecular interactions between porphyrinic compounds and macromolecules. Such interactions are of special interest in medical applications of porphyrinic photosensitizers that are mostly combined with macromolecular carrier systems. The macromolecular surrounding typically stabilizes the encapsulated drug and may also modify its physical properties. Moreover, the interaction with macromolecular physiological components needs to be explored to understand and control mechanisms of action and therapeutic efficacy. This review focuses on such non-covalent interactions of porphyrinic drugs with synthetic polymers as well as with biomolecules such as phospholipids or proteins. A brief introduction into various NMR spectroscopic techniques is given including chemical shift perturbation methods, NOE enhancement spectroscopy, relaxation time measurements and diffusion-ordered spectroscopy. How these NMR tools are used to address porphyrin–macromolecule interactions with respect to their function in biomedical applications is the central point of the current review.

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