Quantitative aspects of speed-up and gap phenomena

2010 ◽  
Vol 20 (5) ◽  
pp. 707-722 ◽  
Author(s):  
KLAUS AMBOS-SPIES ◽  
THORSTEN KRÄLING
Keyword(s):  
Quantitative Analysis ◽  
Computable Function ◽  
Complexity Measure ◽  
The Other ◽  
Effective Measure ◽  
Fast Growing ◽  
Gap Theorem ◽  
Other Hand ◽  
Speed Up

We show that, for any abstract complexity measure in the sense of Blum and for any computable function f (or computable operator F), the class of problems that are f-speedable (or F-speedable) does not have effective measure 0. On the other hand, for sufficiently fast growing f (or F), the class of non-speedable computable problems does not have effective measure 0. These results answer some questions raised by Calude and Zimand. We also give a quantitative analysis of Borodin and Trakhtenbrot's Gap Theorem, which corrects a claim by Calude and Zimand.

scholarly journals VII. The aerodynamics of a spinning shell.—Part II

1922 ◽  
Vol 222 (594-604) ◽  
pp. 227-247 ◽  
Keyword(s):  
Quantitative Analysis ◽  
Qualitative Agreement ◽  
The Other ◽  
Suitable Method ◽  
Force System ◽  
Additional Information ◽  
Other Hand ◽  
The Subject ◽  
Angular Oscillations ◽  
Shell Part

In a previous paper the authors, with others, have described observations of the angular oscillations of the axis of a 3-inch shell over the first 600 feet from the muzzle of the gun, and from an analysis of the observations have obtained information about the forces due to the air. In the experiments, shells were fired from two guns giving different degrees of axial spin to the shell. While the shells fired from the gun giving the more rapid spin were all stable, most of the shells from the other gun were slightly unstable, this condition being shown by the much larger maximum yaw developed. These unstable rounds were not analysed in (A) as no suitable method of doing so had then been devised. The analysis of these rounds, about one-third of the number fired, forms the subject of the present paper; the results confirm those of (A) and provide some additional information. The information as to the force system obtained from the stable rounds was confined to yaws up to 7 degrees or perhaps 10 degrees; by analysis of the unstable rounds this information is extended, though in a fragmentary manner, over the region up to 35 degrees of yaw. On the other hand, no information has been derived from the observed damping of the unstable rounds. The observations are, in respect of the damping, clearly in qualitative agreement with the theory and results of (A), but no method has been devised of making a quantitative analysis of the damping.

scholarly journals Sustainable energy transition in Central Asia: status and challenges

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mirjana Radovanović ◽  
Sanja Filipović ◽  
Andrea Andrejević Panić
Keyword(s):  
Quantitative Analysis ◽  
Central Asia ◽  
Sustainable Energy ◽  
International Energy Agency ◽  
Energy Transition ◽  
Regulatory Framework ◽  
The Other ◽  
Special Importance ◽  
Other Hand ◽  
The Impact

Abstract Background The paper aims at gaining insight into the implementation of the process of sustainable energy transition in the countries of Central Asia: Kazakhstan, Kyrgyz Republic, Tajikistan, Turkmenistan, and Uzbekistan. Information and scientific studies on the situation in these countries is scarce. On the other hand, these are resource-rich countries, some are exporters, and all are energy transit countries. The main aim of the paper was realized by applying the energy policies and regulatory framework analysis, defining priorities and monitoring selected indicators prescribed by the International Energy Agency. Methods The following methods were used in the quantitative analysis: measurement of data intercorrelation; Pearson test of correlation; principal component analysis (with rotation method: Oblimin with Kaiser normalization); Kaiser–Meyer–Olkin measure of sampling adequacy, Bartlett’s test of sphericity and t-test. The period covered by the quantitative analysis: 1990–2018, provided that the available data for 2019 or 2020 were used in certain cases. Results Sustainable energy transition is, at the analysis of policies and data, at a low level. There is no adequate regulatory framework in these countries. The energy transition takes place exclusively within the framework of providing enough energy, without regard to sustainability, while even energy exporting countries are not making efforts to achieve a sustainable energy transition. Conclusions There are no indications that the energy transition in the countries of Central Asia will take place according to the standards of the European Union or global bodies. On the other hand, having in mind the natural resources of the mentioned countries and the specific geopolitical position, monitoring the changes is of special importance. The impact of changes on sustainability can be determined mainly ex post.

scholarly journals Quantum Mechatronics

Electronics ◽  
2021 ◽  
Vol 10 (20) ◽  
pp. 2483
Author(s):  
Lucas Lamata ◽  
Marco B. Quadrelli ◽  
Clarence W. de Silva ◽  
Prem Kumar ◽  
Gregory S. Kanter ◽  
...  
Keyword(s):  
Quantum Effects ◽  
Review Article ◽  
The Other ◽  
Highly Efficient ◽  
Other Hand ◽  
Educational Initiatives ◽  
Speed Up ◽  
Macroscopic Domain ◽  
Promising Avenue

Mechatronics systems, a macroscopic domain, aim at producing highly efficient engineering platforms, with applications in a variety of industries and situations. On the other hand, quantum technologies, a microscopic domain, are emerging as a promising avenue to speed up computations and perform more efficient sensing. Recently, these two fields have started to merge in a novel area: quantum mechatronics. In this review article, we describe some developments produced so far in this respect, including early steps into quantum robotics, macroscopic actuators via quantum effects, as well as educational initiatives in quantum mechatronics.

scholarly journals Traditional and new raw materials for spirit beverage production

2021 ◽  
Vol 17 ◽  
pp. 70-78
Author(s):  
Szymon Ługowoj ◽  
Maria Balcerek
Keyword(s):  
Ethanol Production ◽  
Raw Materials ◽  
The Other ◽  
Raw Material ◽  
Fast Growing ◽  
Growth Requirements ◽  
Other Hand ◽  
Materials Used ◽  
Production Industry

The ethanol production industry is a fast growing branch of the economy in many countries, and there is a rich tradition of spirit beverage production of many unique drinks such as Polish vodka and Starka or Irish and Scotch whisk(e)y, all of which have unique organoleptic features. This variety is possible thanks to different raw materials used for production such as rye, barley or corn and potatoes, as well as technological solutions developed over the generations of manufacturing. Rye deserves a closer look due to its low growth requirements and many different uses as well as its long tradition of cultivation, especially in Poland. On the other hand, manufacturers are currently interested in using new, original raw materials for the production of so-called craft alcohols. Buckwheat is an example of a raw material that can be successfully used in the production of original spirits.

scholarly journals New Generalized Projection Speeds Up Audio Declipping

2019 ◽  
Author(s):  
Pavel Rajmic ◽  
Pavel Záviška ◽  
Vítězslav Veselý ◽  
Ondřej Mokrý
Keyword(s):  
Signal Processing ◽  
Explicit Formula ◽  
Convex Sets ◽  
The Other ◽  
Generalized Projection ◽  
Other Hand ◽  
Linear Transforms ◽  
Speed Up ◽  
Linear Transform

In theory and applications, it is often inevitable to work with projectors onto convex sets, where a linear transform is involved. In this article, a novel projector is presented, which generalizes previous results in that it admits a broader family of linear transforms, but on the other hand it is limited to box-type convex sets in the transformed domain. The new projector has an explicit formula and it can be interpreted within the framework of proximal optimization. The benefit of the new projector is demonstrated on an example from signal processing, where it was possible to speed up the convergence of a signal declipping algorithm by a factor of more than two.

Role of Iron-Rich Phases and Porosity on the Ductility of Rheocast Al-Mg-Si-Alloys

2022 ◽  
Vol 327 ◽  
pp. 65-70
Author(s):  
Qing Zhang ◽  
Stefan Jonsson ◽  
Arne K. Dahle ◽  
Anders E.W. Jarfors
Keyword(s):  
Quantitative Analysis ◽  
Tensile Tests ◽  
Intermetallic Phases ◽  
The Other ◽  
Homogeneous Microstructure ◽  
Fracture Surfaces ◽  
Other Hand ◽  
Primary Particles ◽  
Semi Solid

Treatment of the slurry is important during RheoMetalTM casting. In this work, semi-solid slurries were prepared under different stirring intensities, using two types of stirrers: a naked rod (for regular stirring) and a rod with two blades (for intensified stir). Tensile tests were performed, investigating fracture surfaces, as well as metallographic samples. The results show that intensified stir produces castings with finer primary particles and a more homogeneous microstructure. On the other hand, more faceted Fe-rich phases are found along the α-Al grains boundary as well, due to the dissolution of Fe from the stirrers. Moreover, for intensified stir castings, the porosity found on the fracture surfaces are smaller, while more brittle eutectic phases and second (intermetallic) phases, especially Fe-rich phases, are observed. Consequently, the castings with intensified stir show worse ductility. Finally, a quantitative analysis was made regarding ductility, affected both by porosity and the presence of Fe-rich phases.

The Effectiveness of Administrative Detention of Migrants in Relation to Return Rates: A Compared Analysis along States of EU South Frontier: Italy, France, Greece and Spain as Cases Study

Global Jurist ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Luca Falsone
Keyword(s):  
The Other ◽  
Effective Measure ◽  
Migration Policies ◽  
Return Rates ◽  
Other Hand ◽  
Cases Study ◽  
The Law ◽  
Expected Benefits ◽  
Administrative Detention

AbstractAdministrative detention has gradually become a fundamental instrument in migration policies of European States. The law generally assigns to this measure a key role in supporting removal procedure. On the other hand, administrative detention has been recognised as a symptom of the crimmigration crisis. This article aims to challenge the expected benefits of administrative detention as an effective measure to guarantee the enforcement of removal procedures, analysing available data of imprisonments and removals relative to Italy, France, Spain and Greece in the period of time 2014–2019.

scholarly journals Implementation of Prototyping Method on Website Development of Land use Mapping

2019 ◽  
Author(s):  
Ginanjar Wiro Sasmito
Keyword(s):  
Land Use ◽  
Urban Areas ◽  
Limited Resource ◽  
The Other ◽  
Land Supply ◽  
Website Development ◽  
Other Hand ◽  
Speed Up ◽  
Urban Activity

Increasing diversity of urban activity attracts many people to try their fate in urban areas so as to heighten the flow of urbanization. This resulted in a large demand for land supply to accommodate the increasing number of city dwellers. On the other hand, land is a very limited resource and cannot be created or renewed, so the problem that often arises is the proliferation of slum and squatter areas in urban areas. The solution to the problem is to produce a land use website. By using the prototyping method of land use website is generated in order to speed up the development of website and to really fit with the wishes and needs of the client

scholarly journals The effect of sodium sulfate (Na2SO4) and sodium carbonate (Na2CO3) addition on the reduction-roasting process of titania iron sand

2018 ◽  
Vol 67 ◽  
pp. 03054 ◽  
Author(s):  
Agung Nugraha ◽  
Bambang Priyono ◽  
Ahmad Maksum ◽  
Haidir Juna ◽  
Johny Wahyuadi Soedarsono
Keyword(s):  
Quantitative Analysis ◽  
Sodium Carbonate ◽  
Sodium Sulfate ◽  
The Other ◽  
Reduction Roasting ◽  
West Java ◽  
Primary Parameter ◽  
Optimum Point ◽  
Other Hand ◽  
Roasting Process

This study aims to determine the effect of sodium sulfate (Na2SO4) addition on the reduction proses of tiania iron sand. The sample that used in this research are the iron sand that taken from Sukabumi, West Java, coal as reductor, sodium carbonate (Na2CO3), and sodium sulfate (Na2SO4) as additive and primary parameter. From the result of XRD characterization and semi-quantitative analysis the addition of sodium carbonate (Na2CO3) on roasting process remove the impurities like alumuniom oxide (Al2O3). In the other hand, the content of titano-magnetite (Fe2TiO4-Fe3O4) in the iron sand increase with addition of sodium sulfate (Na2SO4). Meanwhile, from semi-quantitative analysis result with the variation of sodium sulfate (Na2SO4) in 5%, 15%, and 25% have an optimum point on the addition of 15% sodium sulfate (Na2SO4) with 46,9% of titano-magnetite (Fe2TiO4-Fe3O4) content.

Dynamic Model of the Knife Rollers in the Spiral Cutting Machines

2012 ◽  
Vol 164 ◽  
pp. 473-477
Author(s):  
Ling Song Wang ◽  
Ji Li Cheng ◽  
Dong Ai Wang ◽  
Hui Na Ni ◽  
Yu Chen Han
Keyword(s):  
Quantitative Analysis ◽  
Dynamic Model ◽  
Dynamic Simulation ◽  
Theoretical Basis ◽  
The Other ◽  
Packaging Materials ◽  
Other Hand ◽  
Ground Point ◽  
Set Up ◽  
The One

Nowadays, the spiral cutting machines have been widely used in many areas, such as packaging materials. However, the theoretical researches of that are very rare in academia. On the one hand, the machines’ technological principles are the commercial secrets. On the other hand, developing manufacturing of the machines has no theoretical basis. So, in a word, it’s blank in academia about the spiral cutting machines. In this article, we did quantitative analysis on the part of spiral knife roller and blade, and also set up a modal by describing that in a mathematical way. In addition, we analyzed spiral knife dynamically establishing equations of blade, ground point, roller as well, and finally realized dynamic simulation of the spiral knife by matlab tool. What’s the most special feature of this simulation is that it can do simulations for different parameters. The simulation is convenient for deepening theoretical researches, optimizing parameter selections and being auxiliary tools of design.

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