In manufacturing process the analysis of rejection made by considering various factors such as quality of specification and functional features, productivity issues etc. In this paper an attempt is ...made to address the failed components and to identify for its causes. Unbalancing of armature is the serious concern for rejection in starter motor when compared to other possible rejection since the material cost and the quality cost incurred for the scarp is very high. In this project we have taken samples of different variants and analyzed by doing tryouts and measuring the unbalancing value each stage and identified the critical process by applying cause and effect diagram, this gives an effective methods to overcome the issues in the process of manufacturing. Various quality tools like Pareto diagram, Interrelationship diagrams have been drawn and various comparison charts were also been drawn and arrived into the final conclusion of what effective measure to be done to reduce the imbalance value which has got a tangible benefit of reducing the rejection in armature. Finally we have designed a core driving machine with proper orientation to the core pack and shaft which plays a major role in reducing the radial runout and facial runout values which directly contributes to the correction of Imbalancing and reducing the process time.
Biofilm formation by
Streptococcus pyogenes has been demonstrated as a potentially important mechanism contributing to antibiotic treatment failure.
S. pyogenes is the frequent cause of purulent ...infections in humans and also, it could play a significant role in recurrent and chronic infections.
S. pyogenes biofilm communities tend to exhibit significant tolerance to antimicrobial challenge during infections. The fluoroquinolone derivatives have been previously reported from our laboratory as effective agents against human bacterial pathogens. Therefore, in the present study, we observed the effect of these fluoroquinolones on biofilm formation. Quantitative analysis using 2,3-bis (2-methoxy-4-nitro-5-sulfo-phenyl)-2H-tetrazolium-5-carboxanilide (XTT) at the biofilm inhibitory concentrations (BIC), the compounds 6a, 6c, 7b and 7c reduced 61–71% biofilm and sub-BIC (0.5 and 0.25 BIC) significantly reduced biofilm formation by up to 30–38% and 16–18%, respectively. The Fourier Transform Infrared (FTIR) spectrum of the control and treated
S. pyogenes revealed the shift in the chemical entity corresponding to the exopolysaccharide (EPS). The GC/MS analysis showed that the EPS of
S. pyogenes has the most abundant neutral sugars
l-glucose and
d-mannose which is not detected in the fluoroquinolone treated EPS.
Hybrid encoding for test data compression Kalamani, C.; Mayilsamy, M.; Rukkumani, V. ...
Microprocessors and microsystems,
September 2020, 2020-09-00, 20200901, Letnik:
77
Journal Article
Recenzirano
Main disputes of digital integrated circuits testing are increasing test data volume and test power. The proposed encoding schemes are a combination of nine coded and selective pattern compression, ...Alternate Variable Run length code to reduce test data volume. The test cubes are divided into multiples of 8, 16, 32, and 64 blocks to upsurge the relationship among the successive test patterns which offers enriched test data reduction. The test data blocks are encoded with two methods in order to reduce test data volume. In the first method, the test sets are encoded using nine coded with selective pattern coding to expand the test data density. In the second method, the test sets are encoded using nine coded with Alternate variable run length laterally with selective pattern coding to improve the test data compression. Investigational results show that the proposed first and second approaches offer a maximum of 76% and 83% of compression ratio respectively for ISCAS’89 benchmark circuits.
This paper presents the power quality improvements for a BLDC driver using Vienna rectifier as front end converter. The major drawbacks in the BLDC motor drive and non linear load applications are ...the line pollution and depreciation of the power factor. The conventional power factor correction method is not economical and efficient. It requires bulky components as load changes and produce high THD and less Power factor. The front end converter of BLDC bridge inverter drive is proposed by the Vienna rectifier, which can contribute more significantly in improving the power factor and reduce the line pollution. The Vienna rectifier topology is controlled by the constant switching frequency control technique for wide range of load variation and it reduces the THD, improve the power factor and provide a steady DC link voltage to the bridge inverter to drive the BLDC motor. The design calculation and performance characteristics of BLDC motor and Vienna rectifier are verified by using Matlab simulation.
Abstract
Chitosan has become the most known and second abundantly available recyclable, non-hazardous and eco-friendly biopolymer after cellulose with several advantageous biomedical, agriculture, ...and wastewater treatment applications. As nanotechnology has progressed, researchers have begun incorporating chitosan-based carbon compounds into various compounds, elements, and carbonaceous materials to increase their efficiency and biocompatibility. Chitosan carbon compounds have also been used directly in many applications due to their inherent chelating and antibacterial features and the presence of customizable functional groups. This review widely discusses- the properties and synthesis of chitosan and chitosan composite. It also discusses the modification of chitosan with different compounds, metals, carbonaceous materials, and agriculture residues to allow their use on an industrial scale. Recent advances in the use of chitosan in biomedical, agro-waste management, agriculture, wastewater treatment, and a few other applications (such as food packaging, cosmetics, and the textile and paper sector) are briefly discussed. Furthermore, this analysis reveals that chitosan and its composite materials are potential, low-cost products for environmental clean-up that can be made with basic manufacturing procedures.
Some novel benzimidazol/benzoxazolylethoxypiperidone oximes were synthesized and their antibacterial activity against Staphylococcus aureus (NCIM-2492), Bacillus subtilis (NCIM-2439), Escherichia ...coli (NCIM-2345) and Pseudomonas aeruginosa (NCIM-2035) and antifungal activity against Candida albicans (NCIM-C27), Candida-6 (NCIM-C27), Candida-51 (NCIM-C27), Aspergillus niger (NCIM-590) and Aspergillus flavus (NCIM-539) have been evaluated. Compounds 26 and 27 exerted potent in vitro antibacterial activity against Bacillus subtilis, Escherichia coli and Staphylococcus aureus while compounds 26, 29 and 30 exhibited potent in vitro antifungal activity against Candida albicans, Candida-51, and Aspergillus niger.
Studying the outcomes in patients presenting with cardiogenic shock with ST-segment elevation myocardial infarction (CS-STEMI) and undergoing primary or rescue percutaneous coronary intervention ...(PCI) may give an insight to the unmet needs in STEMI-care in our region and may help in future recommendations in improving survival.
During the period from January 2001- June 2017, there were 114 patients included in the study. The demographic, clinical and angiographic characteristics were compared between the survivors and non-survivors. All these variables were also compared between two-time frames (Phase 1- January 2001 to June 2007; Phase 2- July 2007 to June 2017).
Among patients undergoing PCI for STEMI, 7.5% were in cardiogenic shock. In-hospital mortality for the patients included in the study was 53.5%. Total ischemic time (OR=0.99, 0.99–1; p=0.02), left ventricular ejection fraction (LVEF) (OR=0.90, 0.82–0.98; p=0.02), need for cardio-pulmonary resuscitation (OR=0.12, 0.24–0.66; p=0.01), and post PCI TIMI flows (OR=0.08, 0.02–0.29; p<0.001) were the significant determinants of in-hospital mortality in the regression analysis. There was no significant change in mortality between the two phases of the study, though there was a reduction in total ischemic and door-to-balloon times, transfer admissions, use of thrombolytics, glycoprotein IIb/IIIa inhibitors, intra-aortic balloon pump, and mechanical ventilation in phase 2.
Patients presenting in CS-STEMI and undergoing PCI continue to experience high mortality rates, despite improvements in total ischemic times. Further improvement in the systems-of-care are required to bring about reduction in mortality in this high-risk subset.
Volume change in expansive soils due to the intervention of water causes swell. A laboratory investigation using two different gbeosynthetic materials was designed to minimise the swell ...characteristics. The influence of three parameters, being geosynthetic material Secutex (ST) and Combigrid (CG), orientation (horizontal and vertical), and number of layers (1, 2, and 3) on the swell of an expansive soil was studied to better understand the potential for geosynthetics in swell control. The study on the immediate swell characteristics (limited to 24 hours) helps in gaining confidence in the use of geosynthetics in the swell control of expansive soils. From the investigation results, it was found that all three parameters, being type of material, orientation, and number of layers influenced the swell control of the soil. When two layers of ST and CG were placed both vertically and crossed, they reduced the swell of the virgin soil by almost 60% and 44%, respectively. It can, therefore, be concluded that geosynthetics can play an effective role in the swell control of expansive soils.
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