scholarly journals RECENT RESULTS ON CARDINALITY ESTIMATION AND INFORMATION THEORETIC INEQUALITIES

2021 ◽  
Vol 37 (3) ◽  
pp. 223-238
Author(s):  
Hung Q. Ngo
Keyword(s):  
Research Area ◽  
Theory And Practice ◽  
Geometric Inequalities ◽  
Information Theoretic ◽  
Cardinality Estimation ◽  
The Past ◽  
Open Questions ◽  
Database Theory ◽  
Query Optimizers ◽  
Information Theoretic Inequalities

I would like to dedicate this little exposition to Prof. Phan Dinh Dieu, one of the giants and pioneers of Mathematics in Computer Science in Vietnam. In the past 15 years or so, new and exciting connections between fundamental problems in database theory and information theory have emerged. There are several angles one can take to describe this connection. This paper takes one such angle, influenced by the author's own bias and research results. In particular, we will describe how the cardinality estimation problem -- a corner-stone problem for query optimizers -- is deeply connected to information theoretic inequalities. Furthermore, we explain how inequalities can also be used to derive a couple of classic geometric inequalities such as the Loomis-Whitney inequality. A purpose of the article is to introduce the reader to these new connections, where theory and practice meet in a wonderful way. Another objective is to point the reader to a research area with many new open questions.  

A Review on Fast Dissolving Tablet

2017 ◽  
Vol 8 (03) ◽  
Author(s):  
Sagar T. Malsane ◽  
Smita S. Aher ◽  
R. B. Saudagar
Keyword(s):  
Drug Delivery ◽  
Patient Compliance ◽  
Research Area ◽  
Oral Route ◽  
Dosage Forms ◽  
The Novel ◽  
The Past ◽  
Orally Disintegrating Tablets ◽  
Novel Drug ◽  
Experience Difficulty

Oral route is presently the gold standard in the pharmaceutical industry where it is regarded as the safest, most economical and most convenient method of drug delivery resulting in highest patient compliance. Over the past three decades, orally disintegrating tablets (FDTs) have gained considerable attention due to patient compliance. Usually, elderly people experience difficulty in swallowing the conventional dosage forms like tablets, capsules, solutions and suspensions because of tremors of extremities and dysphagia. In some cases such as motion sickness, sudden episodes of allergic attack or coughing, and an unavailability of water, swallowing conventional tablets may be difficult. One such problem can be solved in the novel drug delivery system by formulating “Fast dissolving tablets” (FDTs) which disintegrates or dissolves rapidly without water within few seconds in the mouth due to the action of superdisintegrant or maximizing pore structure in the formulation. The review describes the various formulation aspects, superdisintegrants employed and technologies developed for FDTs, along with various excipients, evaluation tests, marketed formulation and drugs used in this research area.

An exploration of target L2 morphemes in the oral production of young EFL learners in Croatia

2020 ◽  
Author(s):  
Jelena O'Reilly ◽  
Eva Jakupčević
Keyword(s):  
Foreign Language ◽  
Research Area ◽  
Simple Construction ◽  
L2 Acquisition ◽  
Efl Learners ◽  
Oral Production ◽  
The Past ◽  
Base Form ◽  
Production Study ◽  
Efl Students

Although the second language (L2) acquisition of morphology by late L2 learners has been a popular research area over the past decades, comparatively little is known about the acquisition and development of morphology in children who learn English as a foreign language (EFL). Therefore, the current study presents the findings from a longitudinal oral production study with 9/10-year-old L1 Croatian EFL students who were followed up at the age of 11/12. Our results are largely in line with the limited research so far in this area: young EFL learners have few issues using the be copula and, eventually, the irregular past simple forms, but had considerable problems with accurately supplying the 3rd person singular -s at both data collection points. We also observed a be + base form structure, especially at the earlier stage, which appears to be an emergent past simple construction.

The Nature of Degrowth: Theorising the Core of Nature for the Degrowth Movement

2020 ◽  
Author(s):  
Pasi Heikkurinen
Keyword(s):  
Human Nature ◽  
Culturally Sensitive ◽  
Theory And Practice ◽  
The Core ◽  
The Past ◽  
The Future ◽  
Radical Reduction ◽  
Nature Experience ◽  
Matter Energy

This article investigates human–nature relations in the light of the recent call for degrowth, a radical reduction of matter–energy throughput in over-producing and over-consuming cultures. It outlines a culturally sensitive response to a (conceived) paradox where humans embedded in nature experience alienation and estrangement from it. The article finds that if nature has a core, then the experienced distance makes sense. To describe the core of nature, three temporal lenses are employed: the core of nature as ‘the past’, ‘the future’, and ‘the present’. It is proposed that while the degrowth movement should be inclusive of temporal perspectives, the lens of the present should be emphasised to balance out the prevailing romanticism and futurism in the theory and practice of degrowth.

scholarly journals Device-independent quantum key distribution with random key basis

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
René Schwonnek ◽  
Koon Tong Goh ◽  
Ignatius W. Primaatmaja ◽  
Ernest Y.-Z. Tan ◽  
Ramona Wolf ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Bell Inequality ◽  
Key Distribution ◽  
Theory And Practice ◽  
Information Theoretic ◽  
Information Theoretic Security ◽  
Experimental Parameters ◽  
Secret Keys ◽  
Simple Variant ◽  
First Time

AbstractDevice-independent quantum key distribution (DIQKD) is the art of using untrusted devices to distribute secret keys in an insecure network. It thus represents the ultimate form of cryptography, offering not only information-theoretic security against channel attacks, but also against attacks exploiting implementation loopholes. In recent years, much progress has been made towards realising the first DIQKD experiments, but current proposals are just out of reach of today’s loophole-free Bell experiments. Here, we significantly narrow the gap between the theory and practice of DIQKD with a simple variant of the original protocol based on the celebrated Clauser-Horne-Shimony-Holt (CHSH) Bell inequality. By using two randomly chosen key generating bases instead of one, we show that our protocol significantly improves over the original DIQKD protocol, enabling positive keys in the high noise regime for the first time. We also compute the finite-key security of the protocol for general attacks, showing that approximately 108–1010 measurement rounds are needed to achieve positive rates using state-of-the-art experimental parameters. Our proposed DIQKD protocol thus represents a highly promising path towards the first realisation of DIQKD in practice.

Plant leaf recognition with shallow and deep learning: A comprehensive study

2020 ◽  
Vol 24 (6) ◽  
pp. 1311-1328
Author(s):  
Jozsef Suto
Keyword(s):  
Machine Learning ◽  
Plant Species ◽  
Research Area ◽  
Research Papers ◽  
Plant Leaf ◽  
Leaf Characteristics ◽  
The Past ◽  
The Earth ◽  
Test Sets ◽  
Comprehensive Study

Nowadays there are hundreds of thousands known plant species on the Earth and many are still unknown yet. The process of plant classification can be performed using different ways but the most popular approach is based on plant leaf characteristics. Most types of plants have unique leaf characteristics such as shape, color, and texture. Since machine learning and vision considerably developed in the past decade, automatic plant species (or leaf) recognition has become possible. Recently, the automated leaf classification is a standalone research area inside machine learning and several shallow and deep methods were proposed to recognize leaf types. From 2007 to present days several research papers have been published in this topic. In older studies the classifier was a shallow method while in current works many researchers applied deep networks for classification. During the overview of plant leaf classification literature, we found an interesting deficiency (lack of hyper-parameter search) and a key difference between studies (different test sets). This work gives an overall review about the efficiency of shallow and deep methods under different test conditions. It can be a basis to further research.

scholarly journals Recent progress understanding pathophysiology and genesis of brain AVM—a narrative review

2021 ◽  
Author(s):  
Hans-Jakob Steiger
Keyword(s):  
Large Degree ◽  
Advanced Imaging ◽  
Genetic Origin ◽  
The Past ◽  
Open Questions ◽  
Brain Avm ◽  
Pubmed Search ◽  
Substantial Progress ◽  
The Individual ◽  
Arterial Aneurysms

AbstractConsiderable progress has been made over the past years to better understand the genetic nature and pathophysiology of brain AVM. For the actual review, a PubMed search was carried out regarding the embryology, inflammation, advanced imaging, and fluid dynamical modeling of brain AVM. Whole-genome sequencing clarified the genetic origin of sporadic and familial AVM to a large degree, although some open questions remain. Advanced MRI and DSA techniques allow for better segmentation of feeding arteries, nidus, and draining veins, as well as the deduction of hemodynamic parameters such as flow and pressure in the individual AVM compartments. Nonetheless, complete modeling of the intranidal flow structure by computed fluid dynamics (CFD) is not possible so far. Substantial progress has been made towards understanding the embryology of brain AVM. In contrast to arterial aneurysms, complete modeling of the intranidal flow and a thorough understanding of the mechanical properties of the AVM nidus are still lacking at the present time.

Communication Theory and Training Approaches for Multiculturally Diverse Organizations: Have Academics and Practitioners Missed the Connection?

2001 ◽  
Vol 30 (4) ◽  
pp. 445-455 ◽  
Author(s):  
Marguerite Arai ◽  
Maryanne Wanca-Thibault ◽  
Pamela Shockley-Zalabak
Keyword(s):  
Communication Theory ◽  
Diversity Training ◽  
Multicultural Training ◽  
Theory And Practice ◽  
Important Research ◽  
Human Communication ◽  
The Past ◽  
The Common ◽  
Multiculturally Diverse ◽  
And Training

While a number of articles have looked at the importance of multicultural training in the workplace over the past 30 years, there is little concrete agreement that documents the common fundamental elements of a “successful” diversity initiative. A review of the training literature suggests the importance of human communication theory and practice without including important research, methodologies, and practice from the communication discipline. This article examines formal diversity approaches, provides examples from the literature of several successful diversity initiatives in larger organizations, identifies the limited use of communication-based approaches in diversity training, and discusses the importance of integrating communication theory and practice in future training efforts.

Feminist (Theatre) Historiography / Canadian (Feminist) Theatre: A Reading of some Practices and Theories

1992 ◽  
Vol 13 (1) ◽  
pp. 144-151
Author(s):  
Susan Bennett
Keyword(s):  
Position Paper ◽  
Theory And Practice ◽  
Feminist Theatre ◽  
The Past ◽  
Key Issues ◽  
Theatre Historiography ◽  
Theoretical Analyses ◽  
Extended Discussion

Through this position paper the author seeks to provide a focus for extended discussion of some of the key issues arising from feminist approaches to theatre research. She indicates some of the insights made possible by feminist theoretical analyses of theatre historiography as well as some of the implications of the various positions inscribed in articles on Canadian feminist theatre historiography over the past ten years. The author hopes to facilitate more discussion of the wide variety of feminist challenges to and transformation of the theory and practice of theatre research and theatre historiography.

The Concept of the ‘Living Constitution’ in Russian Constitutional Theory and Practice

2021 ◽  
Vol 46 (3-4) ◽  
pp. 416-445
Author(s):  
Caroline von Gall
Keyword(s):  
Direct Effect ◽  
Paradigm Shift ◽  
Social Conditions ◽  
Theory And Practice ◽  
Constitutional Reform ◽  
Constitutional Theory ◽  
Constitutional Change ◽  
The Past ◽  
Margin Of Appreciation

Abstract In discussing the concept of the ‘living constitution’ in Russian constitutional theory and practice, this paper shows that the Russian concept of the living constitution differs from U.S. or European approaches to evolutive interpretation. The Russian concept has its roots in Soviet and pre-revolutionary Russian constitutional thinking. It reduces the normative power of the Constitution but allows an interpretation according to changing social conditions and gives the legislator a broad margin of appreciation. Whereas the 1993 Russian constitutional reform had been regarded as a paradigm shift with the intention to break with the past by declaring that the Constitution shall have supreme judicial force and direct effect, the paper also gives answers to the complexity of constitutional change and legal transplants and the role of constitutional theory and practice for the functioning of the current authoritarian regime in Russia.

Cameralism as Sonderweg of German Mercantilism?

2021 ◽  
pp. 389-405
Author(s):  
Lars Magnusson
Keyword(s):  
Nineteenth Century ◽  
Political Economy ◽  
Theory And Practice ◽  
The Past ◽  
History Of

In recent years there has been a renewed interest in Cameralism, both as a discourse and as an administrative political economy, in both theory and practice. Attention has been drawn to how Cameralism—defined as thought and practice—should be understood. The aim of this article is to take a step back and focus on the historiography of Cameralism from the nineteenth century onwards. Even though many in recent times have challenged old and seemingly dated conceptualizations and interpretations, they are still very much alive. Most profoundly this has implied that Cameralism most often in the past has been acknowledged as an expression of—German. as it were—exceptionalism to the general history of economic doctrine and thinking.

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