Analysis on the junction point’s stress located at considering fluid-solid coupling effects for support arm under different wall thickness
Abstract— Fluid-structure interaction has a significant effect on stresses in the hinge point because of the impact of ocean currents to the pipeline. Aimed to support arms for deep-sea mining, numerical analysis method and the finite element software ADINA were adopted to analyze the pipeline structure – external fluid mutual coupling effect on stress at the hinge point. The results were shown that: (1) In the case of different wall thickness, the stress changes of the entire pipeline is relatively small, stress located mainly these places close to the junction in the pipelines, the maximum stress exists at the upper connection; (2) With wall thickness of the support pipe increasing, the maximum stress decreases, and when wall thicknesses changed from 9.5mm to 28.7mm interval 2.4mm ,the maximum stress value decreased 19.3%, 15.9%, 13.5%, 11.7%, 10.3%, 9.2%, 8.3%, 7.6% ;(3) With wall thickness increasing, the minimum stress value also reduced, and a minimum stress values decreased 19.9%, 14.0%, 5%, 14.6%, 28.7%, 15.9%, 8.6%, 2.7%,respectively.
Keywords— Support arm, Fluid–structure interaction, Different wall thickness, Stress.
Abstract— This paper presents a product time and cost estimation method taking account the market dynamics and manufacturing system competitiveness. The method is based on the behavioral modeling using on-line unsupervised learning. On one hand, it is modeled the interaction between task and manufacturing system, and on the other hand the interaction between task and market, finally resulting behavioral modeling of the market-manufacturing system relationship to substantiate the strategic component of the competitive management thus ensuring extension in time of the high performance.
Keywords— Behavioral modeling, Cost estimation, Manufacturing system, Product time.
Abstract— Today, information has become more important. Even data, information and knowledge are often used as if they have same meaning. This problem raises difficulties in engineering. It is necessary to exist a knowledge management system to avoid increased costs, waste of time and increased errors. Knowledge management is a comprehensive process of knowledge creation, knowledge validation, knowledge presentation, knowledge distribution and knowledge application. In this paper, knowledge management has been explained in general. Then as an example for this study, machining system has been considered, and an application of Knowledge Management in engineering has been attempted to explain. The paper proposes a knowledge management to achieve a competitive control of the machining systems. The model can be used by the manager for the choosing of competitive orders.
Keywords— Competitive control, Information technology, Knowledge management, Machining system, Marketing knowledge.
Abstract— In this paper, we propose a method to control of make-to-order (MTO) manufacturing system for the operation level. Control achieved with the proposed method is based on modeling the relationship between cost and time, two very important elements of manufacturing process performance evaluation. In order to better represent the specified goal of manufacturing process we propose (as a novelty) as a criteria the Earning Power (EP). It is both synthetic (because it reflects the essential motivation of manufacturing process) as compliant with the most important five performance aspects, namely: profitability, conformance to specifications, customer satisfaction, return on investment and materials/overhead cost, selected by researchers in order of importance.
Keywords— Control, Earning power, Manufacturing operation, Manufacturing system, Simulation.
Abstract— Scheduling patient referrals is one of the most important administrative responsibilities performed in the medical office. A referral scheduling algorithm can be a useful tool in the hands of a primary provider. Primary providers are lacking knowledge regarding the care and treatment of chronic diseases and are not familiar with the current status of available resources (consultant doctors) for patient referrals. During patient referral there is a need to know of the availability of the consultant doctor and his/her status in terms of the patient workload. Referring a patient to a doctor with many patients on the waiting queue might delay the treatment. This can results in “added healing time, pain, and even death. This paper investigates the scheduling models applicable in referral health systems and hence proposes a suitable scheduling optimization model.
Keywords— Dynamic, Static, Scheduling, Referral, Model.
Effect of Base Isolation in Multistoried RC Regular and Irregular Building using Time History Analysis
Abstract— Base isolation (BI) is a technique that has been used around the world to protect the building structures from the damaging effects of earthquake. The installation of isolator in building at base level considerably increases the time period of the structure, which means it reduces the possibility of resonance of the structure giving rise to better seismic performance of the building. The analysis is performed to compare the effectiveness of base isolation in regular and irregular multi-storied RC frame building. For this study, 15 storied R.C frame building has been considered and Time History analysis is carried out using ETABS software version 2013. The Lead Rubber Bearing (LRB) is designed by considering the maximum gravity load coming on the column at the base and the same has been used for analysis. The results obtained from the analysis are compared in terms of time period, base shear, story displacement and story acceleration. Time period for the base isolated structures are higher than that of the fixed base structure. Due to the presence of isolator, base shear and story acceleration are significantly reduced in each direction (X and Y direction) as compared to fixed base building. When compared to base isolated regular building the plan irregular (re-entrant corner) and vertical irregular (vertical geometric irregular) base isolated building gives better performance.
Keywords— Base Isolation, Time History Analysis, lead rubber Bearing, UBC 97 code, ETABS 2013, Base shear.
Abstract— Strong oxidising agents for bleaching and chemical treatments for regeneration of dry and damaged hair are most common factors that cause changes in protein structure and composition. Composition changes in fibrillar proteins – α keratins and globular proteins – KAP’s (keratin-associated proteins) were investigated by protein analysis of the hair fiber using SDS-PAGE. The most significant changes in obtained electrophoregrams from SDS-PAGE analysis of bleached hair were observed in matrix protein fractions (KAP’s), which contain a high concentration of cystine. Constructed electrophoregram from SDS-PAGE gel of hair treated with protein treatment indicates a new protein fraction with a molecular weight of about 2000 Da, probably due on hydrolyzed keratin as an ingredient of protein treatments.
Keywords— bleaching, hair protein treatments, SDS-PAGE.
Abstract— The effectiveness of microwave-assisted preparation of N-alkylisatin-b-thiocarbohydrazones, where alkyl group is methyl and ethyl, was evaluated. The corresponding N-alkylisatin-b-thiocarbohydrazones were predominantly obtained by TCH and N-alkyl substituted isatin in molar ratio 3:1. Reactions of carbonyl-amine condensation were performed in water acidified to pH 1.5 as a solvent system. Reaction mixtures were exposed to microwave irradiation under 300W and pressure 200 psi, for a specified incubation period of 5-15 min. The yield of products obtained by microwave assisted reaction was similar to that had been obtained using conventional reflux method (about 70% to 80%), with reduction of time. The structures of synthesized N-alkylisatins and corresponding N-alkylisatin-b-thiocarbohydrazones were established on the basis of recorded spectral data from IR, GC-MS, 1H NMR and 13C NMR.
Keywords— Microwave-assisted organic synthesis (MAOS), N-alkylisatin, N-alkylisatin-b-thiocarbohydrazone.
Dry solid feeding characteristics by computational particle-fluid dynamics simulation at high pressure
Abstract— The parameters affecting particle injection in a high pressure powder fuel injection system were verified by using computational particle fluid dynamics (CPFD). The particles were coal ( =175 μm, ρs = 1350 kg/m3), and the simulation was performed by changing the clearance between the roller and the hose and by changing the total pressure drop. Also, the wall erosion of the hose was confirmed by changing the clearance. As the clearance decreases from 10 mm to 1 mm when the total pressure difference is 10 bar, it is confirmed that the injection of the particles is increased two-fold, but the power of the motor should be increased to 1.45 times. When the clearance is 5mm, as the total pressure drop is increased from 10 bar to 30 bar, the particle injection rate decreases 0.33-fold, but the motor power must be increased 3-fold. Also, it was confirmed that the wall erosion of the hose was large when the clearance was 7 mm or more.
Keywords— Dry solid feeding, high pressure, simulation, Clearance, Backflow.