Cold-Brazing: A Low Energy - Consuming Metal Joining Technique
Metal-joining plays an important role in the industry and virtually all servicing and manufacturing concerns, directly and indirectly, benefit from it. However, not all kinds of joining processes are suitable for thin metals and light works due to the sensitivity of light metals to heavy heat, rapid corrosion of most metals at high temperatures and very high quantities of heat energy needed to fuse parts. It has been observed that the heat energy required to melt and establish continuity across parts is even higher with welding and brazing-which utilize fillers of high tensile strengths and melting points-such as iron (0.8% steel-800 MNM-e 1535oc), copper (210 MNM-z 10-83oc) and silver (125MNM-e 961oc). In this study, therefore the cold-brazing Joining technique which does not utilize heat in its operation, was studied using experimental designs. Light copper wires of about 0.01mm diameter, zinc electrode and concentrated zinc tetraoxosulphate (vi) solution (Zn2So4) were used and, results from the investigation and calculations show that thin metals and light parts can be easily joined using cold-Brazing joining technique with energy consumption for depositing a zinc filler of 1kg using high temperature process and the same amount of zinc filler using cold-Bracing, in the ratio of 71:269 KJ. Thus, it is certain that other electrolytically depositable metals with higher tensile strengths and melting points than silver-solders and brass, such as copper, can be used with this technique. And if fully made better, the present innovation will not only rival, but surpass most joining methods.
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Determining channel choice and usage intention in a B2C multi-channel environment: A study of Iranian small home appliances manufacturer, Parskhazar Company
Customer channel choice is a critical subject in a multichannel management context. It is important for managers to understand why customers choose a particular shopping channel and how they decide which channel to use. The main goal of this research is investigating the role of channel characteristics as determinant factors of customer channel selection and usage intention in Parskhazar Company. Findings indicate that channel value has the most effect on channel usage intention. Although results refused a direct effect of Perceived channel price on channel usage intention, complementary investigations proved the indirect effect of perceived channel price on customer channel choice and usage intention. In terms of managerial implications, since in our research a direct relationship between perceived channel price and channel usage intention was not proved, the price differentiation policy during their distribution channels can be used in this industry without any problem by charging extra cost in one special channel. Finally, results show that in developing online sales, which are one of the Parskhazar strategic goals, the online purchasing process should be facilitated for Parskhazar customers.
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Dr. M. Varatha Vijayan joined the team of Elixir Editorial Advisory Board from 27th August 2016
We are very happy to announce that from 27th August 2016,Dr. M. Varatha Vijayan has joined the team of Elixir Editorial Advisory Board. He/She will carry a special responsibility for dealing with manuscripts based on Mechanical Engineering. Dr. M. Varatha Vijayan working as a Professor in TKR college of Engg and Tech, Hyderabad ,Telungana ,India. The appointment of Dr. M. Varatha Vijayan as member Editorial Advisory Board strengthens the links and will make it easier for prospective authors to establish contact with the journal. Please send any expressions of interest to elixirpublishers@gmail.com.
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Dr.R.Sathishkumar joined the team of Elixir Editorial Advisory Board from 31st August 2013
We are very happy to announce that from 31st August 2013, Dr.R.Sathishkumar has joined the team of Elixir Editorial Advisory Board. He will carry a special responsibility for dealing with manuscripts based on Electronics and Communication Engineering. Dr.R.Sathishkumar is currently working as Associate professor in Electronics and Communication Engineering, Sri Venkateswara College of Engineering– 522502, India. The appointment of Dr.R.Sathishkumar as member Editorial Advisory Board strengthens the links and will make it easier for prospective authors to establish contact with the journal. Please send any expressions of interest to elixirpublishers@gmail.com.
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Effect of carbon and nitrogen sources on pectinase production by Paecilomyces variotii
Pectinase producing microorganisms were isolated from fruit waste disposable area soil samples of Pazhamuthir Nilayam, Coimbatore, TamilNadu and screened in modified Czapek- Dox media with citrus pectin as sole carbon source. Among the isolates, only four fungal strains showed hydrolyzing zone. The fungal strain showing maximum clearance zone of 36 mm (out of colony diameter of 57 mm) was selected and it was identified as Paecilomyces variotii. The effects of the various carbon sources like dextrose, maltose and cellulose and nitrogen sources like ammonium sulphate, potassium nitrate and urea on the pectinase activity by Paecilomyces variotii were carried out in surface culture fermentation. The results of the investigation revealed that the maximum pectinase production of 9.71 Umg-1protein and of 9.66 Umg-1protein were obtained at both intracellular and extracellular level in 3% dextrose and 3% maltose as carbon sources. Among the nitrogen sources, the maximum pectinase activity of 9.73 Umg-1proteinand 8.65 Umg-1protein was observed in 3% and 2% ammonium sulphate at both intracellular and extracellular level.
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Effect of different methods of Transplanting / Seeding on yield and Economics of medium Land Rainfed rice (Oryza Sativa l.) in Jharkhand
The present study was carried out at farmers fields in Simdega district of Jharkhand during Kharif 2013 and 2014 to evaluate the effects of different methods of transplanting/seeding on yield and economics of medium land rainfed rice. The experiment was conducted with four methods of transplanting/seeding {T1: Farmers practice (Transplanting of 25-30 day old seedlings, more than 5 seedlings/hill at uneven distance and two manual weedings.), T2 : Cultivation under modified SRI (10-12 days old seedling, 25x25 cm2 spacing, single seedling/hill, two weeding by cono weeder and regular ponding of rain water in field.), T3 : Sowing of sprouted seeds by drum seeder and weeding two by cono weeder., T4 :Conventional practice (Transplanting of 20-25 days old seeding, 2-3 seedling/hill at 20x20 cm2 and two mannual weedings.) in 10 replications at farmers filed under RBD. All growth, yield attributing characters, yield and net return was found significantly highest in modified SRI (T2) followed by conventional method. Conventional method and sowing by cono weeder were found at par. The lowest performance was found under farmers practice.
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Entrepreneurial Role in the Development of Human Civilization
Human civilization formed from several communities and each community is growing and developing all the communities. We are observing the evolution of human civilization. Why do some countries get richer every day? And some of the highest incomes in rich countries pay for improving their innovation and development costs and the future of the country but low-income and poor countries does not do anything. Several communities are always people who are hard-working creative and entrepreneurial addition to their problems; help others to solve community problems. Joseph Schumpeter the father of enterprise believed that the scientific and economic development growth and job creation that is possible when a system the people in the community take risks and to new innovative methods of alternative solutions and approaches to per inefficient and archaic .This means anyone with a new idea of entrepreneurship and business process mobilization marketed through the new product or service. The human society development process since the beginning can see with help of a time machine from the beginning until now and we see that in each period and creative entrepreneurs have pioneered new developments. From the Renaissance to the present number of experts on entrepreneurship has researched and everyone has tried to encourage every person in own age. Entrepreneurs are individuals with special characteristics such as courage, innovation, hard work, creativity, with the goal of success, etc. These special conditions during childhood and adolescence and therefore pursue the implementation of their projects. However, the development of national and international entrepreneurs is not possible without new ideas, way of life and their composition, creativity, design, fight hard, take risks and succeed with hope and confidence is high. These three personal skills, technical and management required.The main advantages of entrepreneurship for job creation, completion of civilization and industry increased productivity, preventing brain drain then increase national wealth and etc. Because governments use this key and scroll and progress must appropriate and use this important legislation and provided with the necessary facilities to encourage youth entrepreneurship and to transform society and in the international competition and to succeed in their community.
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Exploring ‘employee satisfaction’ as a productivity and quality enhancement tool in a small scale it sectors
Employee satisfaction has been defined as a function of perceived performance and expectations. It is a persons’ feeling of pleasure or disappointment resulting from comparing a products’ outcome to his/her expectations. If the performance falls short of expectations, the employee is dissatisfied and if it matches the expectations, the employee is satisfied. This research mainly deals with the satisfaction level of an employee in a organization. The research results indicate positive relationships between general employee satisfaction and growth of the company Neglecting employee satisfaction can be harmful to corporate entrepreneurship, which have been previously developed in the right direction, contributing to performance, competitive advantage, and growth. This research deals with general employee satisfaction within small scale organization. In the following sections, the theory, hypotheses, research methodologies, recommendations and results of an empirical study on a sample of firms from small scale software organization are presented.
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Formulation and evaluation of lamotrigine extended release tablets
The present study was to develop once-daily extended release tablet of Lamotrigine, an Anticonvulsant. It is a phenyl triazines derivative showing effective anti-convulsant properties mainly used in effective in preventing seizure spread in the maximum electroshock (MES). The tablets were prepared by the wet granulation method.. The aim of the current study was to develop and optimize a simple matrix system of the model drug (BCS Class-II) using minimum possible excipients, to release the drug in a controlled fashion.Core tablets of model drug (F1 – F12) were successfully prepared by direct compression method, Mannitol SD200 & different grades of HPMC, Xanthan gum, Surelease and Magnesium stearate as excipients by direct compression method. The F11 formulation is the best formulation out of 12 formulations, the F11 contains HPMC k4m and metalose polymers, they maximum drug release and it follows Higuchi model
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Isolation and characterization of Extracellular Lipase Producing Strain of Enterococcus durans from Camel milk
Present study deals with the isolation of lipolytic lactic acid bacteria from camel milk. Bacterial lipase is secreted extracellular and hydrolyses acyl glycerides into free fatty acid. Thus, the intake of bacterial lipase directly in food sample or as probiotic formulation can be helpful for those people suffering from health implications related to high serum triglyceride level. For this purpose, a lipolytic bacterial strain Enterococcus durans purified from camel milk employing enrichment and selective culture technique. Identification was done by sequencing of 16S rDNA/D1/D2 domain of LSU rDNA or ITS region and BLAST analysis. Strain showed significant lipase activity of 3988 U/ml. Physicochemical characterization showed that optimum lipase activity was observed between 7.2-7.5 pH, 30o C – 40 o C temperature, 3.5 %- 4.5 % salinity and 4 % (v/v) inoculum’s size whereas presence of peptone, calcium and tributyrin in media enhanced the lipase production. Optimization of lipase production was done using RSM model. Further purification via DEAE anion exchange leads 1.9 fold purification of lipase with retention of 81 % lipase activity. Quality assurance of this bacterial strain as a probiotic and subsequent formulation development can be useful achievement in the field of medical microbiology.
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