45 research outputs found
Automatic PVC Pipe Cutting Machine
No full textPipe cutting operation plays the important role in pipe extruding industries. In small scale industries the pipe cutting operation in pipe extruding company is done by manual operation. During manual cutting the chip formation is high also there may be a chance of cross cutting of the pipe. These cross cutting occurs due to the tight holding of the pipe. Such that to avoid these kinds of difficulties the pipe cutting operation is done by pneumatically controlled systems. The working of the system is to carry out three processes feeding, clamping and then cutting. The main concern is to regulate the pressure conferring to requirement. The chief work of this system is to slice out huge number of jobs in pipe form rendering to the batch production. The arrangement of the pneumatic valves deployed in this system is accordance to the circuit planned. Automation in the modern world is inevitable. Any automatic machine aimed at the economical use of man, machine, and material worth the most. The pipe feeding and cutting machine works with the help of pneumatic double acting cylinder. The piston is connected to the moving cutting tool the machine is portable in size, so easy transportable. P Manikandan | K Krishnakanth | Prof P Mathan Kumar "Automatic PVC Pipe Cutting Machine" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-3 , April 2018, URL: https://www.ijtsrd.com/papers/ijtsrd10869.pd
Automatic PVC Pipe Cutting Machine
No full textPipe cutting operation plays the important role in pipe extruding industries. In small scale industries the pipe cutting operation in pipe extruding company is done by manual operation. During manual cutting the chip formation is high also there may be a chance of cross cutting of the pipe. These cross cutting occurs due to the tight holding of the pipe. Such that to avoid these kinds of difficulties the pipe cutting operation is done by pneumatically controlled systems. The working of the system is to carry out three processes feeding, clamping and then cutting. The main concern is to regulate the pressure conferring to requirement. The chief work of this system is to slice out huge number of jobs in pipe form rendering to the batch production. The arrangement of the pneumatic valves deployed in this system is accordance to the circuit planned. Automation in the modern world is inevitable. Any automatic machine aimed at the economical use of man, machine, and material worth the most. The pipe feeding and cutting machine works with the help of pneumatic double acting cylinder. The piston is connected to the moving cutting tool the machine is portable in size, so easy transportable. P Manikandan | K Krishnakanth | Prof P Mathan Kumar "Automatic PVC Pipe Cutting Machine" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-3 , April 2018, URL: https://www.ijtsrd.com/papers/ijtsrd10869.pd
Concept design of an installation vessel to install fully assembled next generation offshore wind energy turbines
No full textThe shifting of the European energy market towards the wind energy means there will be more wind farms developed in deeper water and farther away from the shore. The existing infrastructure being used for installation is seldom purpose-built for this task, resulting in delays and consequently loss of money for the operators and contractors. Furthermore, the existing process is labor intensive, time consuming and not very safe, the vessels are limited by design to work in moderate sea conditions that for instance exist in the North Sea during the summer season. Seaway Heavy Lifting has been actively involved in solutions for the single lift installation of wind turbine generators (WTG’s). This thesis is to investigate whether there can be a new concept based on improved hull shapes to install WTG’s in a single lift operation more efficiently. The study involves the development of a concept which can provide safe and speedy transportation and installation of fully assembled next generation WTG’s. The selection of the hull shape is based on an extensive but subjective multi criteria analysis using the mission profile and functional requirements of the vessel and available research & operational data. Most important criteria used are: sufficient capacity to carry 8 completely assembled WTG’s of 7MW in vertical position on deck, sufficient speed potential for good North Sea logistics, good motion characteristics for high installation work-ability, sufficient stability to perform the lifting task. From the multi criteria analysis the SWATH (small water plane area twin hull) appears to be the most promising hull shape and is therefore selected for further analysis. Because Seaway Heavy Lifting has more than two decades experience with mono hull heavy lift vessels, a dual draft mono hull vessel dedicated for WTG installation is also analysed for reference. The dimensions of both vessels are determined based on a parametric study in order to comply with the various design requirements. The required deck area and layout together with the strict stability requirements like drop load criteria and intact stability turned out to be important for overall dimensions of both the SWATH and dual draft mono hull. Furthermore a sensitivity analysis is done on these dimensions to check which ones affect the operability of the SWATH. The stability calculations are validated with the help of recognized stability software. Different speed scenarios are evaluated for a given location to check the dependence on vessel speed, resistance and power requirements which could limit the operability. Based on the derived dimensions both vessels are subjected to multi-body frequency domain motion analysis using a recognized hydrodynamics program. Subsequently the workability of both vessels is investigated using very detailed 2D wave spectral data available for an important North Sea wind farm development area. The results of this thesis are the first steps towards establishing the SWATH as a viable option for operating as a WTG installation vessel. The motion behavior of the SWATH is better than the mono hull in certain important operational conditions. There are some significant advantages which the SWATH exhibits over the Monohull and other hull forms which can be utilized for the purpose of WTG installation and helps in avoiding complex installation systems and techniques to get safe and fast operation.Floating StructuresOffshore & Dredging EngineeringMechanical, Maritime and Materials Engineerin
Insights into Toronto's Foodservice Market using Data Science Tools
No full textAbstract
This paper delivers valuable decision driven insights into Toronto’s foodservice
industry by employing modern-day data science tools. K means, an unsupervised
clustering algorithm is applied to segregate the city’s restaurant market into clusters
based on the types of restaurants established in the city.
Relationship between
foodservice market of a neighbourhood and its location relative to the city centre along
with relationships within various types of restaurants are analysed using inferential
statistics.
Keywords— Data science, k-means clustering, Pearson correlation, linear regres-
sion, p-value, statistical significance, web scraping, API, market insights
Websit
Analysing the microenvironment of 2-p-toluidinylnaphthalene-6-sulfonate (TNS) in solvents and in different conformational states of proteins in relation to its fluorescence properties: a computational study
No full textTNS in aggregated form might show less fluorescence whereas monomeric or lower order aggregates positioned in hydrophobic crevices of a protein might enhance its fluorescence.</p
Investigation on AxMn3O7 Class of Layered Oxides as Versatile Battery Cathodes: Structure and Electrochemistry
No full textRechargeable battery technologies have been the spotlight of global scientific research in the quest to address steadily growing energy demand. Currently, Li-ion batteries have unanimously occupied consumer electronic sector. Most of these batteries are majorly based on two transition elements, Cobalt (Co) and Nickel (Ni), in popular cathodes like LiCoO2 and LiNi1/3Mn1/3Co1/3O2 (NMC). The resource constraints of Co and Ni have paved away for alternate transition metal redox chemistry. In this scenario, manganese based layered materials offer promise owing to their low-cost, resource-friendly nature with high operational safety. The cathode (positive electrode) forms the central component accounting for over 35% of the net cost of battery. The current work revolves around the rational design of high energy density cathode materials synergizing “Synthesis-Structure-Electrochemistry-Mechanism” of economic A2Mn3O7 (A= Li, Na, K, and Zn) class of insertion materials. Triclinic Na2Mn3O7 (P-1, #2) consists of defective (vacant sites) infinite [Mn3O7]-2¥ layers with two distinct Na-sites. The flexibility of variable Mn oxidation states triggers polymorphism and rich crystal chemistry. The Mn+4 oxidation state specifies the ability of layered Na2Mn3O7 to accommodate foreign intercalating alkali-ions with active Mn+4/Mn+3/Mn+2 redox couples. Owing to the low bond valence site energy (BVSE) of the two Na-sites (0.27 eV) in Na2Mn3O7, they can be easily exchanged using simple soft-chemistry techniques. This work demonstrates Na2Mn3O7 as a versatile cathode for secondary Li-ion and post-Li-ion batterie
Can the contra-lateral limb be used as a control with respect to analyses of bone remodelling?
No full textBone loss may result from remodelling initiated by implant stress protection. Quantifying remodelling requires bone density distributions which can be obtained from computed tomography scans. Pre-operative scans of large animals however are rarely possible. This study aimed to determine if the contra-lateral bone is a suitable control for the purpose of quantifying bone remodelling. CT scans of 8 pairs of ovine tibia were used to determine the likeness of left and right bones. The deviation between the outer surfaces of the bone pairs was used to quantify geometric similarity. The density differences were determined by dividing the bones into discrete volumes along the shaft of the tibia. Density differences were also determined for fractured and contra-lateral bone pairs to determine the magnitude of implant related remodelling. Left and right ovine tibiae were found to have a high degree of similarity with differences of less than 1.0 mm in the outer surface deviation and density difference of less than 5% in over 90% of the shaft region. The density differences (10–40%) as a result of implant related bone remodelling were greater than left-right differences. Therefore, for the purpose of quantifying bone remodelling in sheep, the contra-lateral tibia may be considered an alternative to a pre-operative control
Layered Na<sub>2</sub>Mn<sub>3</sub>O<sub>7</sub> as a 3.1 V Insertion Material for Li-Ion Batteries
No full textExploring
Mn-based battery insertion materials, layered Na2Mn3O7 was synthesized via single pot solid-state method.
Rietveld analysis confirmed the formation of triclinic structured
Na2Mn3O7 with P-1
symmetry. With no further optimization, the as-synthesized Na2Mn3O7 was found to be an efficient host
for Li+ (de)intercalation. Na2Mn3O7 delivered a discharge capacity of ∼160 mA h
g–1 by altering the redox couple Mn(IV)/Mn(III)
with a nominal voltage of 3.12 V (vs Li/Li+). Interestingly,
the first discharge of pristine Na2Mn3O7 led to the formation of LixNa2Mn3O7 (2 x <
3) having completely different phase similar to the LiCoO2 structure. Lithiation triggered phase transformation from triclinic
(P-1) to trigonal (R-3m) structure. This electrochemically reformed structure imparts stability
to [Mn3O7]−2∞ building layers, preventing irreversible capacity loss. Underlying
a single-phase (solid-solution) redox mechanism, Na2Mn3O7 acts as a robust cathode material for Li-ion
batteries
Effect of Sesbania grandiflora Linn leaf extracts on diuresis in wistar rats
No full textBackground: This study was designed to evaluate the effect of sesbania grandiflora linn leaf extracts on diuretic activity in wistar rats.Methods: Healthy male wistar albino rats divided into 9 groups and weighing 150-200gm.diuretic activity was expressed by Natriuretic activity, saluretic activity, carbonic anhydrase inhibition, Diuretic index or Diuretic action, saluretic index, Natriuretic index. Animalgroups are divided into: group1 treated as control, 2and 3 treated as standards, group 4, 5 and 6 treated with aqueous leaf extract of Sesbania grandiflora Linn. in different doses of 150,300,450mg/kg. Group 7,8and 9 treated with methanolic leaf extract of Sesbania grandiflora Linn. Doses of 150,300,450mg/kg.Results: No change in body weight group treated with AE-150 (p>0.05) with AE-150 (0.1%), increase in urine volume with increasing doses both with aqueous and methanolic extracts, sodium excretion with methanolic extract was high compared with the aqueous extract, significant increase in potassium excretion in both aqueous and methanolic extract treated groups.All the statistical tests were done by using SPSS version 6. The level of significance was 5% (p≤0.05).Conclusions: All the electrolytes concentration was increased in the urine, hence excluding osmotic diuretic action. Diuretic index, saluretic activity, saluretic index and natriuretic index of ME-450 were more than the value of hydrochlorothiazide hence excludes thiazide diuretic action. But these values were less than furosemide.</jats:p
