366 research outputs found
Efficacy and Safety of Uterine Artery Embolization for Symptomatic Uterine Leiomyomata in Pakistan: A Single Centre Experience
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Global sensitivity analysis of parameters in Puck's failure theory for laminated composites
No full textTitle from first page of PDF file (viewed January 10, 2011)Includes bibliographical references (p. 107-110)Composite materials offer numerous advantages over traditional monolithic materials such as higher specific strength, greater specific stiffness, greater corrosion resistance and good vibration damping characteristics. Improved use of composite materials is a key element to improving energy efficiency of future plane, trains and automobiles. One of the challenges to overcome for achieving higher efficiencies with composite materials is the development of more accurate models and material parameters for composite failure prediction. There are currently over twenty failure criteria to predict failure of fiber reinforced polymer matrix composite materials. Recent assessment of failure prediction models in a worldwide failure exercise showed that the model formulated by Puck (1994) to be the most accurate. However, the Tsai-Wu criterion that was developed in the 1960 and 70s continues to be the work horse in industrial applications. Existing models fail to predict composite material failure accurately under certain loading regimes. To overcome this deficiency engineers simply choose larger safety factors that leads to heavier designs. Using a more accurate model, can allow us to decrease these safety factors and thereby achieve lighter structural designs. The recently formulated Puck's failure model provides such accuracy. However, the model requires as many as eleven material parameters. Some of these parameters require multiplicity of tests/experiments to deduce them. Obtaining material parameters from tests and quantifying their variability is a costly and time consuming exercise. Inaccurately quantified material parameters require enforcing larger safety factors in the design to safeguard for the material property data uncertainty. Gains in improving model fidelity are negated by the inaccuracy of the material parameters available. This thesis presents the results of a global variance sensitivity of material parameters needed for composite failure prediction using Puck's failure theory. Global variance sensitivities quantify the relative contribution of variances in individual material parameters to the total variance of the laminate failure load. The use of total variance sensitivity to identify optimal laminates and loading conditions needed to characterize new material properties more accurately is demonstrated
Amn al-Kharji: An Analysis of External Operations Wing of the Islamic State
No full textThis article provides an analysis of the external operations wing of IS –the so-called Amn al-Kharji – focusing on its activities in the West. Apart from describing the organisation’s leadership, internal hierarchy, strategy and means of communication and attack coordination, the author asserts there is a link between recent deadly cells-based attacks and generally unsuccessful lone actor attacks; this connection between the two is not accidental but a result of a grand strategy, designed to hide the planning of larger plots by overloading security services with numerous smaller attacks
Amn al-Kharji: An Analysis of External Operations Wing of the Islamic State
No full textThis article provides an analysis of the external operations wing of IS -the so-called Amn al-Kharji - focusing on its activities in the West. Apart from describing the organisation's leadership, internal hierarchy, strategy and means of communication and attack coordination, the author asserts there is a link between recent deadly cells-based attacks and generally unsuccessful lone actor attacks; this connection between the two is not accidental but a result of a grand strategy, designed to hide the planning of larger plots by overloading security services with numerous smaller attacks.</jats:p
STPA FOR AUTONOMOUS VEHICLE SAFETY IN TRAFFIC SYSTEMS
No full textIt is speculated that vehicle companies such as Volvo, are actively developing autonomous
vehicles and planning to introduce fully Autonomous Vehicle (AV) test
fleets in the transport systems of Swedish cities. The gradual introduction of autonomous
vehicles is meant to make the traffic system more efficient, reliable, and
most importantly safer than a traditional human-driven vehicle (HDV) dominated
system. However, the introduction of AVs will lead to an increase in the complexity
of the traffic system. Especially the complex interactions between AVs with human
drivers and other traffic participants such as pedestrians. These interactions are
further complicated by operational domain constraints such as road infrastructure
and natural weather conditions. These complex interactions create conditions that
inevitably lead to unforeseen unsafe actions by a human or non-human participant,
resulting in a hazardous scenario and an eventual accident event. Traditional hazard
analysis methods as well as domain-specific ISO standards such as ISO 26262
mainly focus on AV component and functional failures, ignoring high-level safety
hazard casual factors originating from system interactions and organizational flaws.
New hazard analysis tools such as System Theoretical Process Analysis (STPA) provide
systematic and sequential steps for identifying hazardous interactions within a
system in the absence of extensive test trials and operational data. This thesis aimed
to provide a pilot application of STPA for evaluating the systematic safety of AV
in different traffic scenarios. The case study in this thesis is AV at an unsignalized
intersection with an unprotected left turn.
The framework of the methodology in this thesis is formulated by using the STPA
process. The first step defines the scope and objectives of the analysis. This involves
defining the traffic system, enumerating its hazardous states, and identifying losses
unacceptable to stakeholders. The second step establishes the traffic system control
structure consisting of controllers, actuators, sensors, and controlled components.
The third step identifies Unsafe Control Actions (UCA) that under the worst or
extreme environmental conditions will lead to one or more hazards. Lastly UCA
causal factors are identified through a brainstorming process. A hazardous Factor
Network (HFN) is developed for a structured causal factor identification process.
Further, principles of network analysis such as network traceability and betweenness
values are utilized for causal factor (CF) evaluation.
The results show that STPA can be applied to identify hazard causal factors in a
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traffic system with autonomous vehicles. The result also showed that hazard causal
factors in a traffic system are highly connected and related to each other. The
HFN provided a structured framework for casual factor traceability and evaluation.
For example, identified CF5 (inadequate road infrastructure maintenance and management
plan by road authority) had the highest betweenness value in the HFN.
Meaning that CF5 is highly connected to other causal factors and UCAs, hence is
very vital to the safety of AVs in the current traffic system. In conclusion, the thesis
shows that in the absence of high statistical data, STPA can be applied as a framework
for analyzing traffic system safety with the introduction of fully autonomous
vehicles in the current system. This thesis finally recommends further research and
development of the STPA process to include a “probabilistic link” between the Unsafe
Control Actions (UCA) and established causal factors
Effect of an Intervention Educational Program on Improving Nursing Care Given for Pediatric Patients with Orthopedic Problems
No full textAbstract: Pediatric orthopedics is a subspecialty of medicine that deals with the prevention and treatment of musculoskeletal disorders and correcting deformities and congenital anomalies in children by different methods. Aim: The study aimed to assess nurses' knowledge and practices regarding care of pediatric patients with orthopedic problems, design, implement & evaluate the effect of the intervention educational program on nurses' knowledge and practices regarding care of pediatrics patients with orthopedic problems. Design: A quasi -experimental study was utilized. Settings: the study was conducted in Orthopedic Departments at Ain-Shams University Hospital, Benha University Hospital, and Benha Educational Hospital affiliated to the Ministry of Health. Subjects: A convenient sample of nurses (number = 45) who work in the previous mentioned settings. Tools of the study: Interview questionnaire sheet was used to assess nurses' knowledge regarding orthopedic problems in pediatric and observational checklist to assess nurses' practices regarding care of pediatric patients with orthopedic problems. Results: The present study indicated that, the majority of nurses had unsatisfactory knowledge and incompetent practices pre-program intervention. While the majority of them had satisfactory knowledge and competent practices post program intervention respectively also, there was positive correlation between total level of knowledge and total level of practices, in pre/ post a program intervention and at follow up, Conclusion: It was concluded that, there were statistical significant improvements of nurses' knowledge and practices post a program intervention concerning with the effect of educational intervention program regarding care of pediatric with orthopedic problems. Recommendation: It was recommended that, continues educational program for nurses to update their knowledge and practices regarding care of pediatric patients with orthopedic problems.
Keywords: Orthopaedic problems, pediatric, orthopaedic nurses.
Title: Effect of an Intervention Educational Program on Improving Nursing Care Given for Pediatric Patients with Orthopedic Problems
Author: Ghalia Goda Mohamed, Prof. Dr. Safy Salah Eldin Al-Rafay, Prof. Dr. Randa Mohamed Adly
International Journal of Novel Research in Healthcare and Nursing
ISSN 2394-7330
Vol. 9, Issue 2, May 2022 - August 2022
Page No: 226-239
Novelty Journals
Website: www.noveltyjournals.com
Published Date: 22-August-2022
DOI: https://doi.org/10.5281/zenodo.7015147
Paper Download Link (Source)
https://www.noveltyjournals.com/upload/paper/Effect%20of%20an%20Intervention%20Educational-22082022-7.pdfInternational Journal of Novel Research in Healthcare and Nursing, ISSN 2394-7330, Novelty Journals, Website: www.noveltyjournals.co
Land-locked: An Examination of Some of the Inefficiencies Affecting Transactions Involving Immovable Property
No full textIn the study of law and economics, the Coase Theorem posits
that an efficient allocation of resources will result when transactions
costs are zero.1 These “transaction costs” may be viewed as impediments
to an efficient allocation of resources and can take many forms. For
example, long distances between a prospective vendor and purchaser of
property and a lack of communication facilities between them would
impede even the best of intentions to enter into a bargain. Similarly,
the cost of mobilising labour and materials might impede a property
developer from pursuing a tender for civil works. In some cases, a high
rate of Stamp Duty on transactions can result in the parties
reconsidering their decision to enter into such bargains. To the extent
this author can claim knowledge of economics, the Coase Theorem also
suggests that transaction costs and inefficiencies hamper the natural
flow of bargains, result in inefficient allocation of resources and thus
impact the economy. Some transaction costs are small enough to ignore
whereas some, imposed, for example, by the law, are unavoidable. In such
cases, a mutual understanding between the parties may see the burden of
these transaction costs shared or, in others, avoided altogether. For
example, the statutory requirements that all leases purporting to grant
a term in excess of one year or which reserve an annual rent must be
registered and stamped2 often results, in owners of residential property
granting indefinitely renewable leases of 11 months and thus avoiding
such requirements
Is auditor independence influenced by non-audit services? A stakeholders viewpoint
No full textThe auditor may provide numerous services to their clients covering audit and non-audit services (NAS). These services have been considered asa combination of services offering varying results for client firms. The mixed results reported by past studiesin measuring the relation between NAS and auditor independencehad generated the need of further investigation. Moreover, the dearth of literary evidence from a developing country like Pakistan also created a need for such a study. Considering the gaps left unaddressed in past studies, the current study aims at investigating the possible relationship between NAS and auditor independence. Data of the study was collected from three stakeholders of audit (i.e. accountants, finance managers, and internal auditors). Data collected through the questionnaire proved that various respondent groups have different opinions about the said relationship. It was observed that NAS were believed to have positive, negative and no effects on auditor independence. Moreover, occupational level, experience and educational level of the respondents was also observed to have significant bearing on the opinion aboutNAS and auditor independence relationship. The changing dynamics of the audit profession with abridged trust in itsservices, caused by NAS, have created the need for investigation focusing on views of various stakeholders ofsuch services. This study attempts to provide empirical evidence on the varied perspectives
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