Structural Features for Predicting the Linguistic Quality of Text

2010 ◽  
pp. 222-241 ◽  
Author(s):  
Ani Nenkova ◽  
Jieun Chae ◽  
Annie Louis ◽  
Emily Pitler
Keyword(s):  
Structural Features

scholarly journals Zoomqa: Residue-Level Single-Model QA Support Vector Machine Utilizing Sequential and 3D Structural Features

2021 ◽  
Author(s):  
Kyle Hippe ◽  
Cade Lilley ◽  
William Berkenpas ◽  
Kiyomi Kishaba ◽  
Renzhi Cao
Keyword(s):  
Protein Complex ◽  
Structure Prediction ◽  
Tertiary Structure ◽  
State Of The Art ◽  
Chemical Properties ◽  
Structural Features ◽  
Residue Level ◽  
Support Vector ◽  
Single Model

ABSTRACTMotivationThe Estimation of Model Accuracy problem is a cornerstone problem in the field of Bioinformatics. When predictions are made for proteins of which we do not know the native structure, we run into an issue to tell how good a tertiary structure prediction is, especially the protein binding regions, which are useful for drug discovery. Currently, most methods only evaluate the overall quality of a protein decoy, and few can work on residue level and protein complex. Here we introduce ZoomQA, a novel, single-model method for assessing the accuracy of a tertiary protein structure / complex prediction at residue level. ZoomQA differs from others by considering the change in chemical and physical features of a fragment structure (a portion of a protein within a radius r of the target amino acid) as the radius of contact increases. Fourteen physical and chemical properties of amino acids are used to build a comprehensive representation of every residue within a protein and grades their placement within the protein as a whole. Moreover, ZoomQA can evaluate the quality of protein complex, which is unique.ResultsWe benchmark ZoomQA on CASP14, it outperforms other state of the art local QA methods and rivals state of the art QA methods in global prediction metrics. Our experiment shows the efficacy of these new features, and shows our method is able to match the performance of other state-of-the-art methods without the use of homology searching against database or PSSM matrix.Availabilityhttp://[email protected]

scholarly journals Protein microcrystallography using synchrotron radiation

IUCrJ ◽  
2017 ◽  
Vol 4 (5) ◽  
pp. 529-539 ◽  
Author(s):  
Masaki Yamamoto ◽  
Kunio Hirata ◽  
Keitaro Yamashita ◽  
Kazuya Hasegawa ◽  
Go Ueno ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Data Collection ◽  
Diffraction Data ◽  
Structure Determination ◽  
Structural Features ◽  
X Ray ◽  
Data Collection Strategy ◽  
Technological Developments ◽  
Novel Method

The progress in X-ray microbeam applications using synchrotron radiation is beneficial to structure determination from macromolecular microcrystals such as smallin mesocrystals. However, the high intensity of microbeams causes severe radiation damage, which worsens both the statistical quality of diffraction data and their resolution, and in the worst cases results in the failure of structure determination. Even in the event of successful structure determination, site-specific damage can lead to the misinterpretation of structural features. In order to overcome this issue, technological developments in sample handling and delivery, data-collection strategy and data processing have been made. For a few crystals with dimensions of the order of 10 µm, an elegant two-step scanning strategy works well. For smaller samples, the development of a novel method to analyze multiple isomorphous microcrystals was motivated by the success of serial femtosecond crystallography with X-ray free-electron lasers. This method overcame the radiation-dose limit in diffraction data collection by using a sufficient number of crystals. Here, important technologies and the future prospects for microcrystallography are discussed.

scholarly journals Children's Television: The German Situation

1999 ◽  
Vol 93 (1) ◽  
pp. 77-89
Author(s):  
Ben Bachmair ◽  
Dirk Ulf Stötzel
Keyword(s):  
Structural Features ◽  
Children's Television ◽  
Federal Republic Of Germany ◽  
Public And Private ◽  
Media Regulation ◽  
Current State ◽  
The Social ◽  
Public Debates ◽  
Air Channels

This article provides an overview of the current state of and future prospects for children's television in the Federal Republic of Germany. It begins with a brief description of current television provision for children, and of children's viewing patterns, and it suggests that views of children's relations with the medium are heavily influenced by social class. The article goes on to describe the structural features of broadcasting and of media regulation in Germany, paying particular attention to the federal structure and the balance between public and private. The implications of this situation for children's programming are then analysed, with particular attention paid to the heavy regulation of advertising on free-to-air channels, and the need to protect children's slots in the context of a general move towards specialist channels. The article concludes by outlining the terms of recent public debates about the social purpose and quality of children's television.

scholarly journals The Retromolar Space and Wisdom Teeth in Humans: Reasons for Surgical Tooth Extraction

2020 ◽  
Author(s):  
Abed El Kaseh ◽  
Maher Al Shayeb ◽  
Syed Kuduruthullah ◽  
Nadeem Gulrez
Keyword(s):  
Homo Sapiens ◽  
Third Molar ◽  
Structural Features ◽  
Morphometric Study ◽  
Third Molars ◽  
Facial Skeleton ◽  
Lower Jaw ◽  
Wisdom Teeth ◽  
Retromolar Region

Abstract Objective This article explores the problem of developing pathologies in the retromolar region. Findings can serve a framework for disease prevention and for the improvement of the quality of life of patients. The present study aims to justify the possibility of utilizing morphometric methods to foresee problems in the eruption of third molars. Materials and Methods A comprehensive morphometric study of the lower jaw and facial skeleton involves 100 skulls of Homo sapiens to identify the anatomical causes of problems with wisdom teeth eruption. All said skulls are divided in two groups: I: skulls with intact dentition; II: skulls with impacted third molars. Results This work allows detecting abnormalities in the eruption of the third molar with high probability of success. The abnormalities in point are considered not only those associated with the generally accepted parameters but also those that occur in the leptoprosopic face cases. Conclusions Face type and the structural features of the facial skeleton play a significant role in the abnormal eruption of the lower third molar.

scholarly journals Blind Quality Evaluation for Screen Content Images Based on Regionalized Structural Features

Algorithms ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 257
Author(s):  
Wu Dong ◽  
Hongxia Bie ◽  
Likun Lu ◽  
Yeli Li
Keyword(s):  
Quality Evaluation ◽  
Evaluation Method ◽  
Structural Information ◽  
Modern Society ◽  
Structural Features ◽  
Human Vision ◽  
Natural Images ◽  
Histograms Of Oriented Gradients ◽  
Screen Content

Currently, screen content images (SCIs) are widely used in our modern society. However, since SCIs have distinctly different properties compared to natural images, traditional quality assessment methods of natural images cannot precisely evaluate the quality of SCIs. Thus, we propose a blind quality evaluation method for SCIs based on regionalized structural features that are closely relevant to the intrinsic quality of SCIs. Firstly, the features of textual and pictorial regions of SCIs are extracted separately. For textual regions, since they contain noticeable structural information, we propose improved histograms of oriented gradients extracted from multi-order derivatives as structural features. For pictorial regions, since human vision is sensitive to texture information and luminance variation, we adopt texture as the structural feature; meanwhile, luminance is used as the auxiliary feature. The local derivative pattern and the shearlet local binary pattern are used to extract texture in the spatial and shearlet domains, respectively. Secondly, to derive the quality of textual and pictorial regions, two mapping functions are respectively trained from their features to subjective values. Finally, an activity weighting strategy is proposed to combine the quality of textual and pictorial regions. Experimental results show that the proposed method achieves better performance than the state-of-the-art methods.

scholarly journals QSAR modeling of antibacterial activity of some benzimidazole derivatives

2011 ◽  
Vol 17 (1) ◽  
pp. 33-38 ◽  
Author(s):  
Sanja Podunavac-Kuzmanovic ◽  
Dragoljub Cvetkovic
Keyword(s):  
Antibacterial Activity ◽  
Qsar Model ◽  
Quantitative Structure Activity Relationship ◽  
Structural Features ◽  
Benzimidazole Derivatives ◽  
Qsar Modeling ◽  
Qsar Study ◽  
Validation Procedure ◽  
Leave One Out

A quantitative structure-activity relationship (QSAR) study has been carried out for training set of 12 benzimidazole derivatives to correlate and predict the antibacterial activity of studied compounds against Gram-negative bacteria Pseudomonas aeruginosa. Multiple linear regression was used to select the descriptors and to generate the best prediction model that relates the structural features to inhibitory activity. The predictivity of the model was estimated by cross-validation with the leave-one-out method. Our results suggest a QSAR model based on the following descriptors: parameter of lipophilicity (logP) and hydration energy (HE). Good agreement between experimental and predicted inhibitory values, obtained in the validation procedure, indicated the good quality of the generated QSAR model.

scholarly journals The pandemic crisis: The mechanisms of development and solutions for economic policy

2021 ◽  
Vol 49 (1) ◽  
pp. 209-216
Author(s):  
A.A. Shirov ◽  
Keyword(s):  
Quality Of Life ◽  
Economic Policy ◽  
Economic Activity ◽  
Excess Mortality ◽  
Structural Features ◽  
Russian Economy ◽  
New Challenges ◽  
The Difference ◽  
Mechanisms Of Development

The new coronavirus pandemic has created new challenges for experts in economic analysis and substantiation of economic policy. The difference between a pandemic crisis and the mechanisms of a traditional business cycle crisis requires a description of the key mechanisms of its development. The relatively more favorable macroeconomic results of the Russian economy in 2020 were determined both by its structural features and by the parameters of economic policy. At the same time, the crisis led to significant social losses, which resulted in an increase in excess mortality and a decrease in real incomes of the population, and unemployment rising. The crisis has shown the impossibility of targeted support for all the affected segments of the population. In this regard, a rapid recovery of economic activity on the basis of state support can be the most effective way to restore the level and quality of life of the population.

scholarly journals INSTITUTIONALIZING OF PROPERTY RELATIONS IN THE SYSTEM OF NETWORK COORDINATION NEXUS

2019 ◽  
Vol 8 (6) ◽  
Author(s):  
Sergey D. Mokichev ◽  
Lilia F. Zulfakarova ◽  
Tina M. Vakhitova
Keyword(s):  
Institutional Environment ◽  
Structural Features ◽  
Economic Life ◽  
Financial Capital ◽  
Economic Science ◽  
Property Relations ◽  
Institutional Approach ◽  
Network Coordination ◽  
Modern Economic

There is an active development and use of the principles and research tools of the institutional approach in modern economic science. It allows establishing the relationships that exist between the economic, political and social elements of the system, expanding the boundaries of economic life. The institutional environment determines the goals, functions and dynamics of interaction in property relations. Thus, it appears the effectiveness of functioning of its various forms, which will depend on the institutional structure of management as a system of norms and rules that determine the configuration of property rights, together with coercive instruments. The article considers the approach from the theory of constructivism, which describes the structural features of property relations, taking as a basis the system of network coordination of relations. Formation of a network structure and a new, non-hierarchical way of coordinating ties reflects new economic realities associated with the strong interdependence of property subjects. Formation of a knowledge economy, development of globalization, integration of property subjects have led to the accelerated development of innovations, to a new quality of property relations. Innovations are supported by a huge agglomeration of social, innovative, intellectual and financial capital, which forms the emergence of “innovations in innovations” and determines the relevance of studying the system of network coordination of relations.

scholarly journals QUALITY ASSURANCE OF ADDITIVE MANUFACTURING THROUGH LAYER-BY-LAYER CONTROL SYSTEM

2018 ◽  
pp. 17-24
Author(s):  
A. V. Chabanenko ◽  
V. O. Smirnova ◽  
A. O. Smirnov ◽  
N. N. Rozhkov
Keyword(s):  
Quality Assurance ◽  
Control System ◽  
Structural Features ◽  
Additive Technologies ◽  
Industrial Robots ◽  
Layer By Layer ◽  
Digital Production ◽  
Automated Lines ◽  
Layer Control

Today additive technologies are one of the most dynamically developing types of «digital» production. They allow to achieve acceleration of the solution of problems of preparation and adjustment of production and are already actively applied and to production of finished goods. Additive technologies are a part of industrial robots (IR). On their basis there is a possibility of the organization of complexes with a possibility of fast adjustment and readjustment which, in the majority, are intended for building in the flexible automated lines of additive production. The greatest efficiency of automation of layer-by-layer synthesis at the expense of IR can be reached due to the comprehensive approach to a question of creation and introduction of quality assurance systems considering features of structure and mechanisms of work of the additive installation. To control the quality of layer-by-layer synthesis by means of the control system of the additive installation, it is necessary to take into account the structural features of the 3D-Lapper. An important role in the work of additive plants is played by the properties of the polymers used in bulk printing, which affect the quality of the final product.

Impulse response evaluation of drilled shafts with pile caps: modeling and experiment

2004 ◽  
Vol 31 (2) ◽  
pp. 169-177 ◽  
Author(s):  
S C Baxter ◽  
M O Islam ◽  
S L Gassman
Keyword(s):  
Impulse Response ◽  
Three Dimensional ◽  
Structural Features ◽  
Drilled Shafts ◽  
Deep Foundations ◽  
Surface Reflection ◽  
Straightforward Method ◽  
Pile Cap ◽  
Pile Caps

Impulse response, a nondestructive surface reflection technique, offers a way to assess the quality and integrity of deep foundations. While the impulse response test is a straightforward method to implement, interpretation of the data is often difficult. The response of a shaft will be affected by construction conditions, accessibility and quality of the concrete, as well as by gross defects in geometry. As a result, test responses seldom resemble the ideal theoretical response. The difficulty is increased when the accessibility of the shaft is limited by the presence of a pile cap or other structures. This study progressively develops and builds two-dimensional (2-D) and three-dimensional (3-D) finite element models of experimentally tested shafts to identify key structural features that can be modeled and captured experimentally. For shafts with pile caps, the model helped confirm previous interpretations of the experimental data presented in this paper, identifying the shaft base, a defect, and the base of the pile cap.Key words: nondestructive testing, quality assessment, quality assurance, impulse response.

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