Dynamic Analysis of High Frequency Vibro-Impact Drilling

Vibro-impact drilling system modelling is a research and results of the selected models which is more complex model known as three mass model. As we know that this model is invented to prove the dynamic relationship between the drilled formation and drill bit. The static force, excitation frequency and the excitation amplitude is the main three main control parameters. The investigation ensures that rate of progression is varied by the three main parameters. Higher the static force and excitation amplitude, the best progression rate can be achieved. Thus, in this case, the static force is linear with excitation of amplitude. However, the lower value of excitation and increases in excitation of frequency with the decrease in static force, the result shows zero progression rate. Thus, this concludes the zero progression rate at higher excitation frequency for this models. As based on analysis, the model uses the resonance enhanced drilling (RED) technique for forming resonance state by using the adjustable high dynamic stress to improve the rate of progression. The simulation for the vibro-impact drilling motion is obtained by solving the equation of motion using MATLAB software

Study on Cost of Procuring Chilled Water from District Cooling System (DCS) Against Constructing an In-Building Chiller Plant for an Office Tower

A financial feasibility study on the cost of procuring Chilled Water from a District Cooling System (DCS) Plant versus the cost for Constructing, Owning, Maintaining and Operating a Conventional In-Building Electric Water-Cooled Chilled Water Plant was carried out. The Building is a 35 storey office building located in Kuala Lumpur. The Chilled Water Supply from the DCS Plant is envisaged for 24 hours daily for a period of 25 years. The Supply Temperature shall be 6.5 ± 0.5 ºC and the Differential Temperature ?T shall be 7 ºC. Using A simple payback period calculation, it was found that the provision of a In-Building Chilled Water System is more economically favorable than procuring Chilled Water from a DCS Plant

Effect of Statin Therapy on Serum Lipase and Blood Glucose Levels in Patients with Hyperlipidemia

Hyperlipidemia is an abnormality in the lipoprotein metabolism that leads to alterations in the various lipoproteins and the prevalence was 37.5% in age group of 15 - 64 years. Hypercholesterolemia was identified to be the risk factor for coronary artery disease and cerobrovascular disease. Statins are the hypolipidemic drugs which helps in lowering the blood cholesterol and lipoprotein levels that acts by inhibiting the 3-Hydroxy-3-methyl glutaryl coenzyme A [HMG-CoA] reductase enzyme. Apart from various adverse effects mentioned in textbooks, there were case reports mentioning that statins can be a cause for the development of acute pancreatitis [AP], where there was an elevation in the levels of serum lipase, serum amylase and blood glucose. Hence, it was hypothesized in this present study that, statin therapy in hyperlipidemic patients increases the levels of serum lipase and blood glucose Three months of treatment with atorvastatin or rosuvastatin significantly increases the levels of serum lipase and blood glucose when compared with the base line

A Method of Extended Jacobian and Firefly Algorithm for the Kinematic Analysis of Planar Robots

Planar robots are one of the optimal robot form impacted in typical Cartesian plane. It consists of fixed divisions and connectors positioned in series which offers like working of human arm. The one end of robot arm position is fixed and the other arm of the robot move through the Cartesian plane by modifying the framework of arm joints. The kinematic analysis on planar robot includes position, velocity and acceleration are validated not by considering the force which cause motion to robot. The manipulator with lack of design and fault tolerant operation is analytical for application in remote and threat environment where periodic maintenance and improvements are not available. The most advanced architecture and operational flexibility of robots offer new probability and advancement in a large scale of fabrication process. This paper proposes inverse kinematic analysis of PUMA 560 robotic arm to conclude long range of fault tolerance. The proposed work incorporates Jacobian and Firefly algorithm are generally useful for determining inverse kinematics for redundant robots

Dynamic Analysis of High Frequency Vibro-Impact Drilling

Vibro-impact drilling system modelling is a research and results of the selected models which is more complex model known as three mass model. As we know that this model is invented to prove the dynamic relationship between the drilled formation and drill bit. The static force, excitation frequency and the excitation amplitude is the main three main control parameters. The investigation ensures that rate of progression is varied by the three main parameters. Higher the static force and excitation amplitude, the best progression rate can be achieved. Thus, in this case, the static force is linear with excitation of amplitude. However, the lower value of excitation and increases in excitation of frequency with the decrease in static force, the result shows zero progression rate. Thus, this concludes the zero progression rate at higher excitation frequency for this models. As based on analysis, the model uses the resonance enhanced drilling (RED) technique for forming resonance state by using the adjustable high dynamic stress to improve the rate of progression. The simulation for the vibro-impact drilling motion is obtained by solving the equation of motion using MATLAB software

Pentapartitioned Single-Valued Neutrosophic Z-Numbers: Theory and Applications

This paper introduces a novel framework, Pentapartitioned Single-Valued Neutrosophic Z-Numbers (PSVNZNs), to model uncertainty in decision-making problems. By integrating the five-component uncertainty representation of Pentapartitioned Neutrosophic Sets (PNSs) with the reliability aspect of Z-numbers, PSVNZNs offer a comprehensive approach to tackle complex decision scenarios. A novel scoring function and various aggregation operators, including weighted arithmetic, geometric, and hybrid averages, are developed to facilitate decision-making processes. The proposed PSVNZN framework adheres to the properties of linear averaging operators. To demonstrate its practical application, a multi-criteria decision-making (MCDM) problem involving electric vehicle selection is considered. A graphical representation of the obtained scores further enhances the clarity and interpretability of the results

Endoscopic management of postoperative fistulas and leaks

Postoperative complications from gastrointestinal surgery can be associated with significant morbidity, and mortality especially if repeat surgery is needed to address these complications. There are wide array of endoscopic interventions and tools available for management of these complications using minimally invasive methods thus decreasing length of hospitalization, morbidity and leading to better patient outcomes. With the advent new tools like Overstitch device, Over the Scope Clip, fibrin glue, etc., these complications can be managed successfully with minimal morbidity. We provide an indepth discussion about available endoscopic options and their application in various scenarios in our article. Endoscopist should be familiar with these complications and endoscopic tools to promote use of these tools and techniques to achieve successful management of these complex conditions