OLEMAR

2008 ◽  
pp. 1-35 ◽  
Author(s):  
Riadh Ben Messaoud ◽  
Sabine Loudcher Rabaséda ◽  
Rokia Missaoui ◽  
Omar Boussaid
Keyword(s):  
Association Rules ◽  
Real Life ◽  
Data Cube ◽  
Multidimensional Space ◽  
Online Environment ◽  
Data Cubes ◽  
Mining Association Rules ◽  
The One ◽  
Definition Of ◽  
Analysis Platform

Data warehouses and OLAP (online analytical processing) provide tools to explore and navigate through data cubes in order to extract interesting information under different perspectives and levels of granularity. Nevertheless, OLAP techniques do not allow the identification of relationships, groupings, or exceptions that could hold in a data cube. To that end, we propose to enrich OLAP techniques with data mining facilities to benefit from the capabilities they offer. In this chapter, we propose an online environment for mining association rules in data cubes. Our environment called OLEMAR (online environment for mining association rules), is designed to extract associations from multidimensional data. It allows the extraction of inter-dimensional association rules from data cubes according to a sum-based aggregate measure, a more general indicator than aggregate values provided by the traditional COUNT measure. In our approach, OLAP users are able to drive a mining process guided by a meta-rule, which meets their analysis objectives. In addition, the environment is based on a formalization, which exploits aggregate measures to revisit the definition of the support and the confidence of discovered rules. This formalization also helps evaluate the interestingness of association rules according to two additional quality measures: lift and loevinger. Furthermore, in order to focus on the discovered associations and validate them, we provide a visual representation based on the graphic semiology principles. Such a representation consists in a graphic encoding of frequent patterns and association rules in the same multidimensional space as the one associated with the mined data cube. We have developed our approach as a component in a general online analysis platform called Miningcubes according to an Apriori-like algorithm, which helps extract inter-dimensional association rules directly from materialized multidimensional structures of data. In order to illustrate the effectiveness and the efficiency of our proposal, we analyze a real-life case study about breast cancer data and conduct performance experimentation of the mining process.

scholarly journals Framing the Real: Lefèbvre and Neo-Realist Cinematic Space as Practice

2014 ◽  
Author(s):  
David Brancaleone
Keyword(s):  
Film Theory ◽  
Real Life ◽  
Vital Role ◽  
Theory And Practice ◽  
Multidimensional Space ◽  
Spatial Practices ◽  
The Real ◽  
Cinematic Space ◽  
The Difference ◽  
The One

In 1945 Roberto Rossellini’s Neo-realist Rome, Open City set in motion an approach to cinema and its representation of real life – and by extension real spaces – that was to have international significance in film theory and practice. However, the re-use of the real spaces of the city, and elsewhere, as film sets in Neo-realist film offered (and offers) more than an influential aesthetic and set of cinematic theories. Through Neo-realism, it can be argued that we gain access to a cinematic relational and multidimensional space that is not made from built sets, but by filming the built environment. On the one hand, this space allows us to “notice” the contradictions around us in our cities and, by extension, the societies that have produced those cities, while on the other, allows us to see the spatial practices operative in the production and maintenance of those contradictions. In setting out a template for understanding the spatial practices of Neo-realism through the work of Henri Lefèbvre, this paper opens its films, and those produced today in its wake, to a spatio-political reading of contemporary relevance. We will suggest that the rupturing of divisions between real spaces and the spaces of film locations, as well the blurring of the difference between real life and performed actions for the camera that underlies much of the central importance of Neo-realism, echoes the arguments of Lefèbvre with regard the social production of space. In doing so, we will suggest that film potentially had, and still has, a vital role to play in a critique of contemporary capitalist spatial practices.

THE INCREMENTAL MINING OF CONSTRAINED CUBE GRADIENTS

2007 ◽  
Vol 06 (02) ◽  
pp. 253-278 ◽  
Author(s):  
YUBAO LIU ◽  
JIANLIN FENG ◽  
JIAN YIN
Keyword(s):  
Association Rules ◽  
Performance Studies ◽  
Data Cube ◽  
Incremental Mining ◽  
Comparison Process ◽  
Association Rules Mining ◽  
Data Cubes ◽  
Mining Algorithm

The mining of cube gradients is an extension of traditional association rules mining in data cube and has broad applications. In this paper, we consider the problem of mining constrained cube gradients for partially materialized data cubes. Its purpose is to extract interesting gradient-probe cell pairs from partially materialized cubes while adding or deleting cells. Instead of directly searching the new data cubes from scratch, an incremental mining algorithm IncA is presented, which sufficiently uses the mined cube gradients from old data cubes. In our algorithms, the condensed cube structure is used to reduce the sizes of materialized cubes. Moreover, some efficient methods are presented in IncA to optimize the comparison process of cell pairs. The performance studies show the incremental mining algorithm IncA is more efficient and scalable than the directed mining algorithm DA with different constraints and sizes of materialized data cubes.

scholarly journals THE PHILOSOPHY OF DESTRUCTION: “CATECHISM OF A REVOLUTIONARY” IS KILLER-TEXT

2018 ◽  
Keyword(s):  
Real Life ◽  
The Other ◽  
Philosophical Foundation ◽  
The Real ◽  
The Public ◽  
Total Destruction ◽  
Ethical Nihilism ◽  
Key Features ◽  
The One ◽  
Definition Of

The article presents a philosophical analysis of the “Catechism of a Revolutionary” in the light of its paradoxically and nihilistic boundedness which resulted in the system of practical actions of S. G. Nechaev, led to the murder of student Ivanov. In this connection the identification of the philosophical foundation of the Catechism of a Revolutionary becomes relevant, as well as the definition of its nature in the scale of textuality and effectiveness. The author proposes to consider the “Catechism of a Revolutionary” as a philosophical text on the basis of the presence of metaphysical and existential aspects in the article. At the same time, the author highlights such key features: a focus on practice (rejection of theorizing in favour of the action “here and now”), substitution of purpose by means (replacing the value of the public weal with total destruction and the paradox of the struggle for equality through formation of a rigid hierarchy), as well as extreme ethical nihilism and cynicism. All these premises allow the author to designate the ideological foundation of the “Catechism of a Revolutionary” as a holistic and consistent philosophy of destruction. In addition, this philosophy is considered in the context of its direct embodiment, implemented by S. G. Nechayev: lie, blackmail, compromising, and most importantly – murder. The author of the article concludes that it is impossible to explore the “Catechism of a Revolutionary” apart from the actual consequences of the implementation of his philosophy, and therefore one cannot speak only of his textual nature, detached from the real life. Instead, it should be considered as a fusion of textuality and effectiveness, which directly transforms being and affects people’s lives. Thus, the “Catechism of a Revolutionary” is presented by the author as a killer-text, consisting of a philosophy of destruction on the one hand and its embodiment into reality on the other. Such an approach allows not only to comprehensively explore the nature of the “Catechism of a Revolutionary”, but also to identify a number of dangers that the philosophy of destruction bears inside.

It’s 10 o’Clock: Do You Know Where Your Sensors Are?

2000 ◽  
Vol 1716 (1) ◽  
pp. 10-19 ◽  
Author(s):  
Richard N. Stubstad ◽  
Lynne H. Irwin ◽  
Erland O. Lukanen ◽  
M. Lawrence Clevenson
Keyword(s):  
Real Life ◽  
Information Management System ◽  
Percent Correct ◽  
Positioning Errors ◽  
Proper Definition ◽  
The One ◽  
Definition Of ◽  
Falling Weight ◽  
National Information ◽  
Sensor Positioning

More than 400 falling weight deflectometer (FWD) devices are presently in use throughout the world, and deflection reading accuracy is very important. Deflections are measured in microns, or hundredths of a mil, and even very small errors in the deflection readings can have a profound effect on the results of backcalculation. One question that has somehow escaped scrutiny is the one alluded to in the title to this paper—exactly where along the deflection basin are the FWD deflection sensors positioned? This is an extremely important issue for proper definition of the deflection basin as a function of distance from the center of the loading plate. A review of the FWD load-deflection data in the Long Term Pavement Performance (LTPP) study found that in at least 7 percent of some 4 million lines of FWD deflection data in the National Information Management System (NIMS) database, the sensors were not positioned as reported. This problem is not limited to LTPP and NIMS, and it occurs all too frequently on FWDs everywhere. How sensor positioning errors influence backcalculated moduli, even if all other facets of the FWD data are 100 percent correct, is described. Examples of the errors found in NIMS are also presented—real-life illustrations of what can go wrong and how much influence these errors can have on pavement analysis. A method of scanning for sensor positioning errors without carrying out backcalculation is presented. By use of the suggested transform, sensor positioning errors are clearly evident when suspect data are compared with correct data along the same, or other, pavement sections.

Understanding functional illiteracy from a policy, adult education, and cognition point of view: Towards a joint referent framework

2019 ◽  
Vol 30 (2) ◽  
pp. 109-122
Author(s):  
Aleksandar Bulajić ◽  
Miomir Despotović ◽  
Thomas Lachmann
Keyword(s):  
Adult Education ◽  
Operational Definition ◽  
Literacy Skills ◽  
Point Of View ◽  
Industrialized Countries ◽  
Functional Illiteracy ◽  
Scale Levels ◽  
Components Of Reading ◽  
The One ◽  
Definition Of

Abstract. The article discusses the emergence of a functional literacy construct and the rediscovery of illiteracy in industrialized countries during the second half of the 20th century. It offers a short explanation of how the construct evolved over time. In addition, it explores how functional (il)literacy is conceived differently by research discourses of cognitive and neural studies, on the one hand, and by prescriptive and normative international policy documents and adult education, on the other hand. Furthermore, it analyses how literacy skills surveys such as the Level One Study (leo.) or the PIAAC may help to bridge the gap between cognitive and more practical and educational approaches to literacy, the goal being to place the functional illiteracy (FI) construct within its existing scale levels. It also sheds more light on the way in which FI can be perceived in terms of different cognitive processes and underlying components of reading. By building on the previous work of other authors and previous definitions, the article brings together different views of FI and offers a perspective for a needed operational definition of the concept, which would be an appropriate reference point for future educational, political, and scientific utilization.

Is Treat-to-target in Lupus Nephritis Realistic in Clinical Practice?

2018 ◽  
Vol 15 (1) ◽  
pp. 2-6 ◽  
Author(s):  
Chi Chiu Mok
Keyword(s):  
Lupus Nephritis ◽  
Disease Activity ◽  
Safety Concern ◽  
Real Life ◽  
Current Treatment ◽  
Treat To Target ◽  
Low Disease Activity ◽  
Activity State ◽  
Definition Of ◽  
Comparative Trials

The Treat-to-Target (T2T) principle has been advocated in a number of inflammatory and non-inflammatory medical illnesses. Tight control of disease activity has been shown to improve the outcome of rheumatoid arthritis and psoriatic arthritis as compared to the conventional approach. However, whether T2T can be applied to patients with lupus nephritis is still under emerging discussion. Treatment of lupus nephritis should target at inducing and maintaining remission of the kidney inflammation so as to preserve renal function and improve survival in the longterm. However, there is no universal agreement on the definition of remission or low disease activity state of nephritis, as well as the time points for switching of therapies. Moreover, despite the availability of objective parameters for monitoring such as proteinuria and urinary sediments, differentiation between ongoing activity and damage in some patients with persistent urinary abnormalities remains difficult without a renal biopsy. A large number of serum and urinary biomarkers have been tested in lupus nephritis but none of them have been validated for routine clinical use. In real life practice, therapeutic options for lupus nephritis are limited. As patients with lupus nephritis are more prone to infective complications, tight disease control with aggressive immunosuppressive therapies may have safety concern. Not until the feasibility, efficacy, safety and cost-effectiveness of T2T in lupus nephritis is confirmed by comparative trials, this approach should not be routinely recommended with the current treatment armamentarium and monitoring regimes.

Democracy and Political Culture

2019 ◽  
Author(s):  
Ross McKibbin
Keyword(s):  
Political Culture ◽  
Case Studies ◽  
Social System ◽  
Political System ◽  
Democratic Politics ◽  
Social Structures ◽  
The Political ◽  
The Subject ◽  
The One ◽  
Definition Of

This book is an examination of Britain as a democratic society; what it means to describe it as such; and how we can attempt such an examination. The book does this via a number of ‘case-studies’ which approach the subject in different ways: J.M. Keynes and his analysis of British social structures; the political career of Harold Nicolson and his understanding of democratic politics; the novels of A.J. Cronin, especially The Citadel, and what they tell us about the definition of democracy in the interwar years. The book also investigates the evolution of the British party political system until the present day and attempts to suggest why it has become so apparently unstable. There are also two chapters on sport as representative of the British social system as a whole as well as the ways in which the British influenced the sporting systems of other countries. The book has a marked comparative theme, including one chapter which compares British and Australian political cultures and which shows British democracy in a somewhat different light from the one usually shone on it. The concluding chapter brings together the overall argument.

An LQ Approach to Active Control of Vibrations in Helicopters

1996 ◽  
Vol 118 (3) ◽  
pp. 482-488 ◽  
Author(s):  
Sergio Bittanti ◽  
Fabrizio Lorito ◽  
Silvia Strada
Keyword(s):  
Optimal Control ◽  
Active Control ◽  
Linear Quadratic ◽  
Control Effort ◽  
Vibration Effect ◽  
Suitable Definition ◽  
Lq Optimal Control ◽  
The One ◽  
Definition Of ◽  
And Control

In this paper, Linear Quadratic (LQ) optimal control concepts are applied for the active control of vibrations in helicopters. The study is based on an identified dynamic model of the rotor. The vibration effect is captured by suitably augmenting the state vector of the rotor model. Then, Kalman filtering concepts can be used to obtain a real-time estimate of the vibration, which is then fed back to form a suitable compensation signal. This design rationale is derived here starting from a rigorous problem position in an optimal control context. Among other things, this calls for a suitable definition of the performance index, of nonstandard type. The application of these ideas to a test helicopter, by means of computer simulations, shows good performances both in terms of disturbance rejection effectiveness and control effort limitation. The performance of the obtained controller is compared with the one achievable by the so called Higher Harmonic Control (HHC) approach, well known within the helicopter community.

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