A CASE STUDY ON IMPROVING THE PRODUCTIVITY USING IE TOOLS

Assembly line balancing has been a focus of interest in Industrial Engineering for the last few years. Assembly line balancing is the problem of assigning tasks to workstations by optimizing a performance measure while satisfying precedence relations between tasks and cycle time restrictions. Line balancing is an important feature in ensuring that a production line is efficient and producing at its optimum. The process of Line balancing attempts to equalize the work load on each workstation of the production line. Mixed model assembly lines are increasing in many industries to achieve the higher production rate. This study deals with mixed-model assembly line balancing and uses Yamazumi chart to break down the work element in to the value added & Non-value added part to reduce the waste & increase the productivity

SYNTHESIS OF COPPER OXIDE NANOPARTICLES BY CHEMICAL PRECIPITATION METHOD FOR THE DETERMINATION OF ANTIBACTERIAL EFFICACY AGAINST STREPTOCOCCUS SP. AND STAPHYLOCOCCUS SP.

Objective: To determine antimicrobial efficacy of copper oxide nanoparticles (CuO NPs) against Streptococcus sp. and Staphylococcus sp. Methods: CuO NPs were synthesized using chemical precipitation method. The reducing agent, 0.1 M NaOH, was used along with 100 mM CuSO4 precursor for the synthesis of CuO NPs. The characterization of CuO NPs was done by ultraviolet-visible spectroscopy and scanning electron microscopy (SEM) to study optical and morphological characteristics, correspondingly. The identification of bacterial cultures was done through microscopic and biochemical studies. Antibacterial efficacy of CuO NPs was determined against Streptococcus sp. and Staphylococcus sp. by qualitative and quantitative methods through anti-well diffusion assay and broth dilution method, respectively. Results: The absorption spectrum and band gap were found to be at 260 nm and 4.77 eV, respectively. The SEM image of CuO NPs shows cluster of nanostructures having width of individual clusters in the range of 100 nm–500 nm. CuO NPs showed inhibition at a concentration ranging from 60 μg/mL to 1000 μg/mL. Conclusion: Finally, CuO NPs can be used as effective antibacterial agent against Streptococcus sp. and Staphylococcus sp. and may have applications in medical microbiology

Tin Oxide Film Deposition and Characterization for a Chemoresistive Gas Sensor

The proposed work studies the synthesis, structural, and sensitivity of tin oxide films deposited by sputtering for a gas sensor. This includes an analysis of a tin oxide film doped with noble metal palladium. Gas sensitivity of the deposited layer is analysed as per the deposition parameters such as the thickness of the film, substrate temperature, argon-oxygen ratio of the sputtering environment, and duration and doping metal weight percentage into the tin oxide films and the results obtained are explained

Analysis and Review of Tin Oxide-Based Chemoresistive Gas Sensor

Different type of mechanisms of gas sensing, various factors that affect the mechanisms, ways to improve the gas sensitivity, state of the art of fabrication techniques and materials used are reviewed. The work also discusses a novel type of gas sensor derived based on the reviewed mechanisms and materials. The development of semiconductor-based gas sensors using tin oxide which is simple to implement, low cost and offering good stability and sensitivity is discussed

Analysis of Factors for Improving Functionality of Tin Oxide Gas Sensor

The proposed work discusses different parameters which are considered to improve the performance of a tin oxide-based thin film gas sensor. This includes analysing and deducing suitable catalytic additives to enhance the performance of the sensor in terms of selectivity and sensitivity. Chemical sensitization and electronic sensitization are performed to improve the rate of response of the sensor

Fabrication of Conductive Polyurethane by using Silica Nanoparticles

Plastic is a type of organic polymer material that can be shaped or molded as per the required applications. They are characterized by resistance to corrosion, electrical conductivity, malleability, colors, transparency, durability, and cost. One of the important parameter is electrical conductivity of plastic to weight ratio. By adding additives to plastics the electrical properties are manipulated as per application. This work reports the development of conducting polyurethane for electronic applications It includes synthesis of silica nanoparticles using sol-gel process and its characterization using microscopic, spectroscopic results and conductivity results

Determination of Antagonistic Effect of CuO NPs against Bacterial Cultures

Bacterial cultures are capable of causing infections to the humans. These bacteria can be killed or inhibited by special compounds called antibacterial agents. These compounds are generally not toxic to humans as most of the compounds are obtained from natural sources, such as, b-lactams (like penicillins), cephalosporins. Overuse of traditional antibacterial drugs, resistance may develop by bacterial cells, which ultimately leads to pose greatest health challenges by occurrence of infectious diseases. Therefore, development of non-resistance alternative antibacterial agents for better antibacterial efficacy is mandatory. This paper reports on the synthesis of copper oxide nanoparticles carried out by chemical precipitation method and explored its antibacterial efficacy against hospital borne bacterial infections. Copper oxide nanoparticles were synthesized by solvothermal route. The screening of antimicrobial activity of copper oxide nanoparticles was studied on the bacteria Staphylococcus aureus NCIM 2079 and Bacillus cereus NCIM 5293 by Anti Well Diffusion Assay (AWDA) on nutrient agar (NA) medium. It was evident that the Staphylococcus aureus was more sensitive for CuO NPs compared to Bacillus cereus. The synthesized CuO-NPs showed remarkable antibacterial activity against Bacillus cereus and Staphylococcus aureus. Minimum Inhibitory (MIC) and Minimum Bactericidal Concentration (MBC) of CuO-NPs were determined by calculating concentration dependent colony forming units per milliliter (CFU/mL) on agar plate. To synthesis of copper oxide nanoparticles carried out by chemical precipitation method and explored its antibacterial efficacy against hospital borne bacterial infections