A semantic-based multi-domain role mapping mechanism

2014 ◽  
Author(s):  
Lijuan Diao ◽  
Wei She ◽  
I-Ling Yen ◽  
Junzhong Gu
Keyword(s):  
Role Mapping ◽  
Mapping Mechanism

An Attribute Mapping Technique for Secure Interoperation in Multi-Domain Environments

2014 ◽  
Vol 519-520 ◽  
pp. 181-184
Author(s):  
Jian Feng Lu ◽  
Xuan Yan ◽  
Yi Ding Liu
Keyword(s):  
Access Control ◽  
Mapping Technique ◽  
Cardinality Constraint ◽  
Constraint Violation ◽  
Basic Technique ◽  
Access Control Policies ◽  
Role Mapping ◽  
Simple Action ◽  
Definition Of ◽  
Secure Interoperation

Role mapping is a basic technique for facilitating interoperation in RBAC-based collaborating environments. However, role mapping lacks the flexibility to specify access control policies in the scenarios where the access control is not a simple action, but consists of a sequence of actions and events from subjects and system. In this paper, we propose an attribute mapping technique to establish secure context in multi-domain environments. We first classify attributes into eight types and show that only two types of attributes need to be translated. We second give the definition of attribute mapping technique, and analysis the properties of attribute mapping. Finally, we study how cardinality constraint violation arises and shows that it is efficient to resolve this security violation.

scholarly journals Is children's acquisition of the passive a staged process? Evidence from six- and nine-year-olds' production of passives

2011 ◽  
Vol 39 (5) ◽  
pp. 991-1016 ◽  
Author(s):  
KATHERINE MESSENGER ◽  
HOLLY P. BRANIGAN ◽  
JANET F. McLEAN
Keyword(s):  
Syntactic Structure ◽  
Strong Tendency ◽  
Syntactic Priming ◽  
Thematic Roles ◽  
Thematic Role ◽  
Constituent Structure ◽  
Role Mapping ◽  
Transitive Actions

ABSTRACTWe report a syntactic priming experiment that examined whether children's acquisition of the passive is a staged process, with acquisition of constituent structure preceding acquisition of thematic role mappings. Six-year-olds and nine-year-olds described transitive actions after hearing active and passive prime descriptions involving the same or different thematic roles. Both groups showed a strong tendency to reuse in their own description the syntactic structure they had just heard, including well-formed passives after passive primes, irrespective of whether thematic roles were repeated between prime and target. However, following passive primes, six-year-olds but not nine-year-olds also produced reversed passives, with well-formed constituent structure but incorrect thematic role mappings. These results suggest that by six, children have mastered the constituent structure of the passive; however, they have not yet mastered the non-canonical thematic role mapping. By nine, children have mastered both the syntactic and thematic dimensions of this structure.

scholarly journals Decoding the Functional Roles of Cationic Side Chains of the Major Antimicrobial Region of Human Cathelicidin LL-37

2011 ◽  
Vol 56 (2) ◽  
pp. 845-856 ◽  
Author(s):  
Guangshun Wang ◽  
Raquel F. Epand ◽  
Biswajit Mishra ◽  
Tamara Lushnikova ◽  
Vinai Chittezham Thomas ◽  
...  
Keyword(s):  
Immune Modulation ◽  
Membrane System ◽  
Side Chains ◽  
Cationic Antimicrobial Peptide ◽  
Content Type ◽  
Functional Roles ◽  
E Coli ◽  
Bacterial Aggregation ◽  
Role Mapping ◽  
Cationic Residues

ABSTRACTHuman cathelicidin LL-37 is a critical cationic antimicrobial peptide for host defense against infection, immune modulation, and wound healing. This article elucidates the functional roles of the cationic side chains of the major antimicrobial region of LL-37, corresponding to residues 17 to 32 (designated GF-17). Antimicrobial assays, killing kinetics studies, and vesicle leakage experiments all indicate that a conversion of lysines to arginines affected the ability of the peptide to kill the Gram-positiveStaphylococcus aureusstrain USA300. Alanine scanning experiments show thatS. aureusis less sensitive thanEscherichia colito a single cationic residue mutation of GF-17. Among the five cationic residues, R23 appears to be somewhat important in killingS. aureus. However, R23 and K25 of GF-17 are of prime importance in killing the Gram-negative organismE. coli. In particular, R23 is essential for (i) rapid recognition, (ii) permeation of theE. coliouter membrane, (iii) clustering of anionic lipids in a membrane system mimicking theE. coliinner membrane, and (iv) membrane disruption. Bacterial aggregation (i.e., rapid recognition via charge neutralization) is the first step of the peptide action. Structurally, R23 is located in the interface (i.e., the first action layer), a situation ideal for the interactions listed above. In contrast, residues K18, R19, and R29 are on the hydrophilic surface of the amphipathic helix and play only a secondary role. Mapping of the functional spectrum of cationic residues of GF-17 provides a solid basis for engineering bacterium-specific antimicrobials using this highly potent template.

scholarly journals From preventative to predictive maintenance: The organisational challenge

2017 ◽  
Vol 231 (10) ◽  
pp. 1174-1185 ◽  
Author(s):  
Luminita Ciocoiu ◽  
Carys E Siemieniuch ◽  
Ella-Mae Hubbard
Keyword(s):  
Technology Implementation ◽  
Process Model ◽  
New Technology ◽  
Predictive Maintenance ◽  
Prognostic Tool ◽  
Prognostic Assessment ◽  
Role Mapping ◽  
Effectiveness And Efficiency ◽  
Condition Monitoring System ◽  
Maintenance Process

Introduction of new technology (technology implementation) within an organisation can have wide reaching implications, beyond the effectiveness and efficiency savings that are typically the aim of such an endeavour. The ‘Health and Prognostic Assessment of Railway Assets for Predictive Maintenance’ project developed a prognostic tool, which aimed to support enhancement of the London underground’s remote condition monitoring system to support change from reactive and preventative to predictive maintenance, in order to increase effectiveness and efficiency and reduce lost customer hours. This paper investigates the organisational challenges associated with the introduction of such a tool. The paper describes the approach adopted to model the extant maintenance processes (focusing on role mapping) and associated organisational structures which revealed issues such as unclear processes, poor communication and data sharing links and problems with delineation of responsibility for decision making. It also describes the development of a new maintenance process model that incorporates the additional functionality of the new prognostic tool, taking in to account changes of roles, responsibilities, organisational processes and activities.

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