Potential Use of the Theory of Vulnerability in Information Systems

2012 ◽  
Vol 25 (2) ◽  
pp. 22-33
Author(s):  
Pedro Sá Silva ◽  
Jorge Pinto ◽  
João Varajão ◽  
António Trigo ◽  
Isabel Bentes ◽  
...  
Keyword(s):  
Information Systems ◽  
Structural Systems ◽  
Sensitive Information ◽  
Simulation Studies ◽  
Damage Scenarios ◽  
The Past ◽  
Interesting Approach ◽  
Systems Simulation ◽  
Type Of Failure ◽  
Potential Use

Information Systems in the past few years became a keystone of society. History shows that in some Information Systems one simple failure can lead to disproportioned economic and social damages. Initially used in structural systems, the theory of vulnerability searches for this type of failure. This theory identifies failures in which small damage can have disproportionate impact consequences in terms of the functionality of the whole system. To test and evaluate these failures injections and analyze the impacts of them in sensitive Information Systems, simulation provides an interesting approach. By mimicking systems and representing them through models, simulation studies an imitated system without disrupting the system itself. Simulation provides a safer approach to explore and test the system in damage scenarios without real consequences. This paper discusses the use of the theory of vulnerability in Information Systems simulation.

An atomic-resolution microscope study of Al contracts on GaAs

1986 ◽  
Vol 44 ◽  
pp. 726-727
Author(s):  
Z. Liliental-Weber ◽  
C. Nelson ◽  
R. Ludeke ◽  
R. Gronsky ◽  
J. Washburn
Keyword(s):  
High Speed ◽  
Schottky Contacts ◽  
Detailed Knowledge ◽  
The Past ◽  
Semiconductor Interfaces ◽  
Deposited Metal ◽  
Microwave Applications ◽  
Free Interfaces ◽  
Potential Use

The properties of metal/semiconductor interfaces have received considerable attention over the past few years, and the Al/GaAs system is of special interest because of its potential use in high-speed logic integrated optics, and microwave applications. For such materials a detailed knowledge of the geometric and electronic structure of the interface is fundamental to an understanding of the electrical properties of the contact. It is well known that the properties of Schottky contacts are established within a few atomic layers of the deposited metal. Therefore surface contamination can play a significant role. A method for fabricating contamination-free interfaces is absolutely necessary for reproducible properties, and molecularbeam epitaxy (MBE) offers such advantages for in-situ metal deposition under UHV conditions

Aminocoumarins: A Privileged Precursor for the Synthesis of Fused Heterocycles

2019 ◽  
Vol 23 (9) ◽  
pp. 1045-1075 ◽  
Author(s):  
Saigal ◽  
Sumbulunnisan Shareef ◽  
Habibur Rahman ◽  
Md. Musawwer Khan
Keyword(s):  
Chemical Reactivity ◽  
Structural Systems ◽  
Natural Occurrence ◽  
Amino Group ◽  
Active Compounds ◽  
The Past ◽  
Fused Heterocycles

Aminocoumarins are one of the important core structural systems, present in several biologically and medicinally active compounds. Owing to its natural occurrence, potential pharmacological applications and remarkable versatility as a privileged precursor, several proficient synthetic protocols have been reported in the literature over the past years. The presence of an amino group and enamine carbon enhances its chemical reactivity and thus such functionality is repeatedly used for the construction of various fused and simple heterocycles. This review highlights the preparation of different aminocoumarins and their applications for the construction of a variety of five, six and eight membered fused heterocycles.

scholarly journals Adhesion GPCRs in Glioblastoma

2021 ◽  
Author(s):  
Gabriele Stephan ◽  
Niklas Ravn-Boess ◽  
Dimitris G Placantonakis
Keyword(s):  
G Protein ◽  
G Protein Coupled Receptors ◽  
The Past ◽  
Novel Treatment ◽  
The Family ◽  
Health And Disease ◽  
Basic Biology ◽  
G Protein Coupled ◽  
Potential Use ◽  
Receptor Family

Abstract Members of the adhesion family of G protein-coupled receptors (GPCRs) have received attention for their roles in health and disease, including cancer. Over the past decade, several members of the family have been implicated in the pathogenesis of glioblastoma. Here, we discuss the basic biology of adhesion GPCRs and review in detail specific members of the receptor family with known functions in glioblastoma. Finally, we discuss the potential use of adhesion GPCRs as novel treatment targets in neuro-oncology.

A Progress Report on the Quest to Establish a Cybersickness Dose Value

2002 ◽  
Vol 46 (26) ◽  
pp. 2119-2123 ◽  
Author(s):  
Wei Chen ◽  
S.L. Yuen ◽  
R.H.Y. So
Keyword(s):  
Linear Relationship ◽  
Motion Sickness ◽  
Progress Report ◽  
Simulation Studies ◽  
Current Effort ◽  
British Standard ◽  
The Past ◽  
Frequency Weighting ◽  
Made In

This paper summarizes the progress made in the quest to establish a Cybersickness Dose Value (CSDV). The Motion Sickness Dose Value (MSDV), reported in the British Standard BS6841, has been used to predict the severity of seasickness since 1987. In 1999, the authors of this paper proposed a CSDV formulation with a structure similar to that of the MSDV (So, 1999). Since then, several experiments and simulation studies have been conducted to modify and develop the proposed CSDV formula. In particular, progress has been made in (i) the methods to measure CSDV, (ii) the determination of a frequency weighting curve to equalize the non-linear relationship between the navigation velocity and levels of cybersickness, and (iii) the detailed formulation of CSDV. This paper summarizes the past progress and reports on the current effort in developing a CSDV.

The use of complex microbial soil communities in Mars simulation experiments

2008 ◽  
Vol 7 (2) ◽  
pp. 169-176
Author(s):  
Kai Finster ◽  
Aviaja A. Hansen ◽  
Lars Liengaard ◽  
Karina Mikkelsen ◽  
Tommy Kristoffersen ◽  
...  
Keyword(s):  
Bacillus Subtilis ◽  
Simulation Studies ◽  
Interesting Consequence ◽  
Deep Biosphere ◽  
Simulation Experiments ◽  
The Past ◽  
Number Of Microorganisms ◽  
Comprehensive Picture ◽  
Pure Cultures ◽  
Survival Potential

AbstractMars simulation studies have in the past mainly investigated the effect of the simulation conditions such as UV radiation, low pressure and temperature on pure cultures and much has been learnt about the survival potential of sporeformers such asBacillus subtilis. However, this approach has limitations as the studies only investigate the properties of a very limited number of microorganisms. In this paper we propose that Mars simulations should be carried out with complex microbial communities of Martian analogues such as permafrost or the deep biosphere. We also propose that samples from these environments should be studied by a number of complementary methods and claim that these methods in combination can provide a comprehensive picture of how imposed Martian conditions affect the microbial community and in particular the survival of its constituents – microbes as well as biological material in general. As an interesting consequence this approach can lead to the isolation of bacteria, which are more recalcitrant to the imposed Martian conditions than the pure cultures that have previously been studied.

scholarly journals Coated Metal Powders for Laser Powder Bed Fusion (L-PBF) Processing: A Review

Metals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1831
Author(s):  
Robert Bidulsky ◽  
Federico Simone Gobber ◽  
Jana Bidulska ◽  
Marta Ceroni ◽  
Tibor Kvackaj ◽  
...  
Keyword(s):  
Physical Properties ◽  
Powder Bed Fusion ◽  
Metal Powders ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
The Past ◽  
Coated Metal ◽  
Mechanical And Physical Properties ◽  
Interesting Approach ◽  
Coating Methods

In the last years, functionalized powders are becoming of increasing interest in additive manufacturing (particularly in laser powder bed fusion processing, L-PBF), due to their improved flowability and enhanced processability, particularly in terms of laser absorbance. Functionalized powders may also provide higher final mechanical or physical properties in the manufactured parts, like an increased hardness, a higher tensile strength, and density levels close to theoretical. Coatings represent a possible interesting approach for powders’ functionalizing. Different coating methods have been studied in the past years, either mechanical or non-mechanical. This work aims to present an overview of the currently obtained coated powders, analyzing in detail the processes adopted for their production, the processability of the coated systems, and the mechanical and physical properties of the final parts obtained by using L-PBF for the powders processing.

scholarly journals The Challenges of Effectively Anonymizing Network Data

2013 ◽  
pp. 15-22
Author(s):  
Ch. Himabindu
Keyword(s):  
Network Security ◽  
Information Security ◽  
Data Collection ◽  
Network Data ◽  
Sensitive Information ◽  
Security Testing ◽  
The Past ◽  
Technical Leadership ◽  
Security Research ◽  
Privacy Issues

The availability of realistic network data plays a significant role in fostering collaboration and ensuring U.S. technical leadership in network security research. Unfortunately, a host of technical, legal, policy, and privacy issues limit the ability of operators to produce datasets for information security testing. In an effort to help overcome these limitations, several data collection efforts (e.g., CRAWDAD[14], PREDICT [34]) have been established in the past few years. The key principle used in all of these efforts to assure low-risk, high-value data is that of trace anonymization—the process of sanitizing data before release so that potentially sensitive information cannot be extracted.

Enzyme inhibitors of microbial origin

1980 ◽  
Vol 290 (1040) ◽  
pp. 291-301 ◽  
Keyword(s):  
Enzyme Inhibitors ◽  
Future Research ◽  
Main Interest ◽  
Porcine Pancreas ◽  
The Past ◽  
Microbial Origin ◽  
Irreversible Inhibitors ◽  
Antibiotic Agents ◽  
Potential Use ◽  
New Metabolites

The screening for enzyme inhibitors of microbial origin in the past decades has been a prosperous area to find new metabolites that are of potential importance as therapeutic or antibiotic agents. This review attempts a survey of recent achievements in this type of screening. Special emphasis is given to enzyme inhibitors and screening systems in fields where industry has a main interest in development. This includes some notes on the improved methodology for the detection of reversible and irreversible inhibitors of β-lactamases and the presentation of a unique inhibitor of α-amylase from porcine pancreas isolated from a strain of Streptomyces tendae . This inhibitor (HOE 467) may be of potential use in the treatment of diabetic conditions, obesity and adipositas. The results show that the screening for enzyme inhibitors from microorganisms still provides one of the central challenges for future research.

scholarly journals ERAS OF WEB MAPPING DEVELOPMENTS: PAST, PRESENT AND FUTURE

2016 ◽  
Vol XLI-B4 ◽  
pp. 247-252 ◽  
Author(s):  
Bert Veenendaal
Keyword(s):  
Information Systems ◽  
Geographic Information Systems ◽  
Small Group ◽  
Geographic Information ◽  
Multiple Sources ◽  
Geospatial Information ◽  
Web Based ◽  
Web Mapping ◽  
Web Map ◽  
The Past

Developments in web mapping and web based geographic information systems (GIS) have evolved rapidly over the past two decades. What began as online map images available to a small group of geospatial experts and professionals has developed to a comprehensive and interactive web map based on integrated information from multiple sources and manipulated by masses of users globally. This paper introduces a framework that outlines the eras of web mapping and significant developments among those eras. From this framework, some of the influences and trends can be determined, particularly those in relation to the development of technologies and their relation to the growth in the number and diversity of users and applications that utilise web mapping and geospatial information online.

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