scholarly journals Image Collection Summarization Method Based on Semantic Hierarchies

AI ◽  
2020 ◽  
Vol 1 (2) ◽  
pp. 209-228
Author(s):  
Zahra Riahi Samani ◽  
Mohsen Ebrahimi Moghaddam
Keyword(s):  
Large Volume ◽  
Domain Ontology ◽  
Degree Of Freedom ◽  
Initial Image ◽  
New Techniques ◽  
Summarization Method ◽  
Semantic Hierarchies ◽  
High Level ◽  
Image Collection ◽  
Hierarchical Classifier

The size of internet image collections is increasing drastically. As a result, new techniques are required to facilitate users in browsing, navigation, and summarization of these large volume collections. Image collection summarization methods present users with a set of exemplar images as the most representative ones from the initial image collection. In this study, an image collection summarization technique was introduced according to semantic hierarchies among them. In the proposed approach, images were mapped to the nodes of a pre-defined domain ontology. In this way, a semantic hierarchical classifier was used, which finally mapped images to different nodes of the ontology. We made a compromise between the degree of freedom of the classifier and the goodness of the summarization method. The summarization was done using a group of high-level features that provided a semantic measurement of information in images. Experimental outcomes indicated that the introduced image collection summarization method outperformed the recent techniques for the summarization of image collections.

scholarly journals Serial Electron Diffraction Data Processing With diffractem and CrystFEL

2021 ◽  
Vol 8 ◽  
Author(s):  
Robert Bücker ◽  
Pascal Hogan-Lamarre ◽  
R. J. Dwayne Miller
Keyword(s):  
Electron Diffraction ◽  
Data Processing ◽  
Three Dimensional ◽  
Electron Diffraction Data ◽  
New Techniques ◽  
X Ray ◽  
X Ray Crystallography ◽  
Level Of Automation ◽  
Rotation Method ◽  
High Level

Serial electron diffraction (SerialED) is an emerging technique, which applies the snapshot data-collection mode of serial X-ray crystallography to three-dimensional electron diffraction (3D Electron Diffraction), forgoing the conventional rotation method. Similarly to serial X-ray crystallography, this approach leads to almost complete absence of radiation damage effects even for the most sensitive samples, and allows for a high level of automation. However, SerialED also necessitates new techniques of data processing, which combine existing pipelines for rotation electron diffraction and serial X-ray crystallography with some more particular solutions for challenges arising in SerialED specifically. Here, we introduce our analysis pipeline for SerialED data, and its implementation using the CrystFEL and diffractem program packages. Detailed examples are provided in extensive supplementary code.

A New Family of Bricard-Derived Deployable Mechanisms

2016 ◽  
Vol 8 (3) ◽  
Author(s):  
Hailin Huang ◽  
Bing Li ◽  
Jianyang Zhu ◽  
Xiaozhi Qi
Keyword(s):  
Large Volume ◽  
Computer Aided Design ◽  
Degree Of Freedom ◽  
Single Degree Of Freedom ◽  
Single Degree ◽  
New Family ◽  
Revolute Joints ◽  
Computer Aided ◽  
Cad Models ◽  
Aided Design

This paper proposes a new family of single degree of freedom (DOF) deployable mechanisms derived from the threefold-symmetric deployable Bricard mechanism. The mobility and geometry of original threefold-symmetric deployable Bricard mechanism is first described, from the mobility characterstic of this mechanism, we show that three alternate revolute joints can be replaced by a class of single DOF deployable mechanisms without changing the single mobility characteristic of the resultant mechanisms, therefore leading to a new family of Bricard-derived deployable mechanisms. The computer-aided design (CAD) models are used to demonstrate these derived novel mechanisms. All these mechanisms can be used as the basic modules for constructing large volume deployable mechanisms.

New techniques for high pressure falling sphere viscosimetry in DIA-type large volume presses

2014 ◽  
Vol 34 (3) ◽  
pp. 345-354
Author(s):  
Hans J. Mueller ◽  
Felix Beckmann ◽  
David P. Dobson ◽  
Simon A. Hunt ◽  
Christian Lathe ◽  
...  
Keyword(s):  
High Pressure ◽  
Large Volume ◽  
New Techniques ◽  
Falling Sphere

Semantic text-based image retrieval with multi-modality ontology and DBpedia

2017 ◽  
Vol 35 (6) ◽  
pp. 1191-1214 ◽  
Author(s):  
Yanti Idaya Aspura M.K. ◽  
Shahrul Azman Mohd Noah
Keyword(s):  
Image Retrieval ◽  
Semantic Distance ◽  
Image Features ◽  
Superior Performance ◽  
Semantic Retrieval ◽  
Content Type ◽  
Modality Approach ◽  
High Level ◽  
Image Collection ◽  
Practical Implications

Purpose The purpose of this study is to reduce the semantic distance by proposing a model for integrating indexes of textual and visual features via a multi-modality ontology and the use of DBpedia to improve the comprehensiveness of the ontology to enhance semantic retrieval. Design/methodology/approach A multi-modality ontology-based approach was developed to integrate high-level concepts and low-level features, as well as integrate the ontology base with DBpedia to enrich the knowledge resource. A complete ontology model was also developed to represent the domain of sport news, with image caption keywords and image features. Precision and recall were used as metrics to evaluate the effectiveness of the multi-modality approach, and the outputs were compared with those obtained using a single-modality approach (i.e. textual ontology and visual ontology). Findings The results based on ten queries show a superior performance of the multi-modality ontology-based IMR system integrated with DBpedia in retrieving correct images in accordance with user queries. The system achieved 100 per cent precision for six of the queries and greater than 80 per cent precision for the other four queries. The text-based system only achieved 100 per cent precision for one query; all other queries yielded precision rates less than 0.500. Research limitations/implications This study only focused on BBC Sport News collection in the year 2009. Practical implications The paper includes implications for the development of ontology-based retrieval on image collection. Originality value This study demonstrates the strength of using a multi-modality ontology integrated with DBpedia for image retrieval to overcome the deficiencies of text-based and ontology-based systems. The result validates semantic text-based with multi-modality ontology and DBpedia as a useful model to reduce the semantic distance.

scholarly journals Radiation-attenuated schistosome vaccination – a brief historical perspective

Parasitology ◽  
2009 ◽  
Vol 136 (12) ◽  
pp. 1621-1632 ◽  
Author(s):  
Q. D. BICKLE
Keyword(s):  
Vaccine Development ◽  
Lessons Learned ◽  
Great Promise ◽  
New Techniques ◽  
Vaccine Candidates ◽  
Protective Antigens ◽  
Definition Of ◽  
High Level ◽  
Secreted Antigens ◽  
Made In

SUMMARYThe high level of protection which can be induced by vaccination of a range of hosts, from rodents to primates, with live radiation-attenuated schistosome larvae offers great promise for development of a human schistosome vaccine. Studies of the irradiated vaccine models benefitted from significant funding during the 1970–90s and much was learned concerning the inducers, targets and mechanisms of immunity. Less progress was made in definition of the protective antigens involved. The application of new techniques for identifying membrane and secreted antigens has recently provided new vaccine candidates and a new impetus for schistosome vaccine development. This article is intended as an overview of some of the main lessons learned from the studies of the irradiated vaccines as a backdrop to renewed interest in schistosome vaccine development.

scholarly journals Biomimetic properties and estimated in vivo distribution of chloroquine and hydroxy-chloroquine enantiomers

ADMET & DMPK ◽  
2021 ◽  
Author(s):  
Klara Livia Valko ◽  
Tong Zhang
Keyword(s):  
Large Volume ◽  
Volume Of Distribution ◽  
Tissue Binding ◽  
Binding Medium ◽  
Acid Glycoprotein ◽  
Phospholipid Binding ◽  
Racemic Mixtures ◽  
High Level ◽  
Drug Efficiency

Chloroquine and hydroxy-chloroquine already established as anti-malarial and lupus drugs have recently gained renewed attention in the fight against the Covid-19 pandemic. Bio-mimetic HPLC methods have been used to measure the protein and phospholipid binding of the racemic mixtures of the drugs. The tissue binding and volume of distribution of the enantiomers have been estimated. The enantiomers can be separated using Chiralpak AGP HPLC columns. From the α-1-acid-glycoprotein (AGP) binding, the lung tissue binding can be estimated for the enantiomers. The drugs have a large volume of distribution, showed strong and stereoselective glycoprotein binding, medium-strong phospholipid-binding indicating only moderate phospholipidotic potential, hERG inhibition and promiscuous binding. The drug efficiency of the compounds was estimated to be greater than 2 % which indicates a high level of free biophase concentration relative to dose. The biomimetic properties of the compounds support the well-known tolerability of the drugs.

scholarly journals Exploring the star formation histories of galaxies in different environments from MaNGA spectra

2019 ◽  
Vol 15 (S341) ◽  
pp. 60-64
Author(s):  
Maria Argudo-Fernández ◽  
Médéric Boquien ◽  
Shiyin Shen ◽  
Fangting Yuan ◽  
Jun Yin ◽  
...  
Keyword(s):  
Star Formation ◽  
Spectral Energy Distribution ◽  
Star Formation History ◽  
Spectral Energy ◽  
New Techniques ◽  
Secular Evolution ◽  
Isolated Galaxies ◽  
Multi Wavelength ◽  
Field Unit ◽  
High Level

AbstractThe star formation history (SFH) of galaxies allow us to investigate when galaxies formed their stars and assembled their mass. We can constrain the SFH with high level of precision from galaxies with resolved stellar populations, since we are able to discriminate between stars of different ages from the spectrum they emit. However, the relative importance of secular evolution (nature) over nurture is not yet clear, and separating the effects of interaction-driven evolution in the observed galaxy properties is not trivial. The aim of this study is to use MaNGA (Mapping Nearby Galaxies at APO) Integral Field Unit (IFU) data, in combination with multi-wavelength data, to constrain the SFH of nearby isolated galaxies. We present here the new techniques we are developing to constrain the SFH with high level of precision from Spectral Energy Distribution (SED) fitting. This study is part of a China-Chile collaboration program where we are applying these new techniques to investigate how galaxies formed and evolve in different environments.

Analysis, Logic, Considerations, Mitigations, Risk Assessments and Procedure to Drill Horizontal Gas Well With Separation Factor Up to 0.6 between the Ellipses Avoiding Collision in Exploratory Field. Bio-UC Project at Abu Dhabi, United Arab Emirates

2021 ◽  
Author(s):  
Fernando Ruiz ◽  
Ygnacio Nunez ◽  
Mahra Al Hammadi ◽  
Ibrahim Hamdy ◽  
Eisa Al Shamisi ◽  
...  
Keyword(s):  
United Arab Emirates ◽  
Separation Factor ◽  
Risk Assessments ◽  
Abu Dhabi ◽  
New Techniques ◽  
Reservoir Volume ◽  
Asset Value ◽  
Close Proximity ◽  
High Level ◽  
Oil Company

Abstract In a current oil & gas challenging drilling environment where the fields are becoming very congested, PAD drilling and field grid designs with close proximity wells operation is booming. Drilling challenging wells with high collision risks is common as a result of the requirement to maximize the Asset value of the oil fields. For this reason, the urge for ensuring accurate well placement is becoming critical and as a result high technology methods are required to be in place. Developing new areas where the poor and/or inaccurate drilled wells information (most of them are vertical) affect planning and placement of new wells due to the uncertainty in existing wells trajectories, causing collision issues among the new planning and the "trajectory" of the existing wells, leaving huge quantities of reservoir volume not possible to drain. For this study case, where the reservoir has some complexity due to faults and water, such limitation is critical. The analysis and fusion of new techniques and procedure to manage the risk for the collision were implemented. Directional tools with high level of accuracy measurements were deployed and stringent procedures are put in place. The Analysis, Logic, Considerations, Mitigations, Risk Assessments and a New Procedure implemented to avoid collision issues while drilling horizontal wells with Separation Factor (SF) less than 2 (standard worldwide is equal or above 2 and for this case, it was 0.6). This was developed by the Biogenic / Unconventional team, Drilling Department of Abu Dhabi National Oil Company (ADNOC) Onshore with the support of drilling service company and the approval of the ADNOC Head Quarter, to take advantage of around 0.9 km2 of hydrocarbon area for future drain. The well was drilled successfully and safely, no collision or magnetic interference issue in any trajectory survey were reported during drilling and passing close by the existing well.

Floor Vibration Control Using Three-Degree-of-Freedom Tuned Mass Dampers

2004 ◽  
Author(s):  
Khalid I. Al-Hulwah ◽  
Reza Kashani
Keyword(s):  
Building Materials ◽  
Low Cost ◽  
Heavy Traffic ◽  
High Strength ◽  
Degree Of Freedom ◽  
Tuned Mass Dampers ◽  
Floor Vibration ◽  
Normal Human ◽  
High Level ◽  
Three Degree Of Freedom

The use of high-strength material in buildings has resulted in the use of less building materials and, consequently, a high level of flexibility in buildings, making them vibration prone. For example, high-strength concrete has lowered the thickness of concrete slabs used in the floors of steel/concrete buildings, such as office buildings and shopping centers, resulting in excessive floor vibration stemming from heavy traffic and normal human activity. Although not dangerous, such vibration is highly annoying to the occupants of the building. The authors have been working on the use of three-degree-of-freedom (3-DOF) tuned mass dampers (TMD) to abate floor vibration. Such TMDs can provide improved effectiveness over a traditional one-degree-of-freedom TMD and yet possess all of the attractive features of a traditional TMD; namely, simplicity and low cost. As in a 1-DOF TMD, this device will be installed on a concrete floor slab, at an optimally designed/chosen location.

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