April 2019

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Turbine is an important component of aero-engine. Once a fault occurs, especially when the load exceeds the yield strength, the turbocharger will be damaged in a very short time. Therefore, the structural reliability analysis of turbocharger becomes more and more important. A simplified turbine model is established by Catia. The static strength of the model is analyzed based on ANSYS Workbench finite element analysis software. The distribution of stress and deformation is obtained, and the relationship between rotational speed and maximum stress is studied. In addition, the modal analysis of the model can obtain the natural frequencies and modes, which can provide the basis for the optimization design and dynamic analysis.

A study was conducted among 315 randomly selected pigeon farmers across different locations in Gamawa L.G.A to investigate their traditional breeding methods, breeding objectives and traits preferences for selecting breeding stocks. The result obtained showed that majority (75.485%) of the farmers kept the local pigeon breeds over the cross breds (20.70%) and exotic breeds (3.82%). Most of the farmers (42.99%) sourced their breeding stocks from within their flocks over other sources. Most (35.67%) of the farmers kept pigeon for hobby and for meat (32.48%) followed by other reasons. Most of the farmers accorded a higher priority for qualitative trait (Body colour) in selecting breeding males (38.85%) and females (31.55%) over other traits. However, some degrees of emphasis (16.88% and16.24%) were given for productive traits (hatchability and quality of squabs respectively) in selecting breeding females. Majority (80.92%) of the farmers used cross breeding technique to genetically upgrade their birds, despite the fact that most of them (72.205%) had no knowledge of inbreeding. There was a very significant (p<0.001) difference between the study locations across all the variables. The farmer’s indigenous breeding strategies should be harnessed in designing a breeding programme in the study area for better result and sustainability.

Fine management in aeronautical English education is the model system that based on student-oriented teaching, combined with the curriculum organization and teaching management rules of talent training. It has safeguard mechanism and belongs to management strategy and method. Through fine management, the goal of Applied Talents Training pays more attention to the development of personality of talents and the improvement of enterprise literacy. Flexible and diversified training approaches and evaluation of training effect pay more attention to human nature, emotion and value. In the course system, fine management in aeronautical English education is mainly embodied in ability training and project-based teaching. The unified teaching evaluation method of summative evaluation and formative evaluation is adopted to establish a good talent training process.

Introduction: High opening injection pressure (> 15 psi) can detect needle - nerve contact. However, the reliability of injection pressure monitoring to detect needle – nerve or impingement may be affected by syringe size. We hypothesized that monitoring of opening injection pressure (the pressure at which injectate is detected by US) is affected by the size of the syringe used for injection. Methods: After Ethics Commitee approval, 22 gauge 50 mm needles were inserted under US to contact the C5, C6 and C7 nerve roots of fresh human cadavers. Hand-held injections were made using 3 different syringe sizes (5, 10, 20 mL) at a rate commensurate with typical clinical practice. Injections were made bilaterally at each of the above nerve roots. Opening injection pressure data were aquired with an in-line digital pressure recorder using a 60 mL syringe (10ml/min), and injection halted when spread was detected. Results: A total of 48 injection measurements were made. The peak (opening) pressures at which injection commenced in two cadavers were 30.50 psi and 34.07 psi with 5 mL syringe, 29.20 psi and 34.95 psi for 10 mL syringe, 26.03 psi and 29.42 psi for 20 mL syringe, all han-held injection. In automated pump injection 60 mL syringe was used, and maximum achieved pressures were 23.42 psi and 34.03 psi. Opening injection pressures were similar regarless of syringe size (p>0.05). Conclusion: The size of the syringe commonly used in clinical practice of peripheral nerve blockade did not significantly affect the monitoring of the open injection pressure. All injection with the needle – nerve contact resulted in injetion pressure > 20 psi, regardless of syringe size or method of injection. Our findings ate thus consistent with the fluid mechaminc described by Pascal's Law, where pressure exerted anywhere in a confined incompressible fluid system is transmited equally throughout until the opening pressure is reached and injection begins.

This paper verifies the effectiveness of system engineering by its impacts towards enterprise system generation. An industrial case studies is presented about IBM adopted a model-driven engineering method to determine intentional services that meet business goals. It aims to extend the understanding of a specific method of system engineering- Service Oriented Architecture (SOA), with its flexible integration of business process and effective simplification of generation framework. Besides, system engineering tool is also proved to benefit asset collection for enterprises in fashion industry, with Service Oriented Computing (SOC) applied, along with integration of wireless sensor networks framework. In the last, several specific methodologies are also implemented to demonstrate the examinations and assessment ways of the proposed approach, supporting how system engineering provides a practical approach to balance all needs, satisfying enterprise operators, and benefit the system operation throughout the life cycle, not a single tool used for demand analysis.

XML is everywhere: Data Integration, File configuration and Interface definition are areas where XML is intensively present. We may define rules, constraints and configuration settings, or specify graphical interfaces, export data and define rules. This markup language allows the extensibility of any data specification, graphical interface design, or settings storage in an easy and flexible way, which allowed a wide usage of XML in the industry community. Programmers write programs using a learned syntax that depends of a specific language. Languages may share the same paradigm but are different in their syntax and reserved words. Productivity depends of the chosen language, and the developer knowledge of it. Programmers switching from a language to another may build on the paradigm knowledge, however they must learn a new syntax since no flexible universal programming syntax is offered. The purpose of this paper is to offer to the development community a uniform programming platform based on XML, and running on top of different baseline languages and frameworks. By joining a simple language specification to a powerful framework, we reduce the set of required reserved words and syntax mechanisms to learn in a language. We propose a programming platform that increases the productivity while reducing the learning time and error rate. This results in an increase in maintenance quality and rapid development, and code readability.

This study examined the adequacy and effectiveness of disaster and emergency communication tools in crisis situation in Calabar South local government. Study method was the cross sectional survey involving the use of questionnaires. A total of 400 questionnaires were distributed to the sampled communities and key informants to elicit responses. The data collections were grouped according to research questions. The data were organized and presented in tables. Frequency counts of agree and disagree responded were obtained and mean scores were used for data analysis. Risk characterization using Risk Assessment Matrix was used to ascertain the level of probable risk residents may face in the event of emergencies or disaster incidents. Table 3 in the study shows the total sum for agree was (100), with a mean score of (20), while the total sum for Disagree was (300) and the mean score was (60).This result shows that the respondents admit strongly on the non-availability of the modern emergency communication tools, and also strongly disagrees on adequacy and the effectiveness of the available ones in the management of disasters in Calabar South local government Cross River State. Table 4 of the research also shows that residents are not aware of some of the modern emergency communication tools and how they are utilized during disaster situations in the local government. The study recommends that Emergency Management Agencies should improve on their communication level with the public to bridge the poor communication gap between the agencies and the people. This will improve on the level of helplessness and hopelessness of the residents to disseminate information during disasters. This assertion corroborates with the study by United States Centre for Disease Control which states that the most valuable way of information transformations and dissemination are based on a new key player in emergency management – ‘the public’.