Chebyshev model arithmetic for factorable functions

This article presents an arithmetic for the computation of Chebyshev models for factorable functions and an analysis of their convergence properties. Similar to Taylor models, Chebyshev models consist of a pair of a multivariate polynomial approximating the factorable function and an interval remainder term bounding the actual gap with this polynomial approximant. Propagation rules and local convergence bounds are established for the addition, multiplication and composition operations with Chebyshev models. The global convergence of this arithmetic as the polynomial expansion order increases is also discussed. A generic implementation of Chebyshev model arithmetic is available in the library MC++. It is shown through several numerical case studies that Chebyshev models provide tighter bounds than their Taylor model counterparts, but this comes at the price of extra computational burden

Antimicrobial Activity of Synthetic and Biological Organic Compounds

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માનવ અધિકારના સંદર્ભમાં વળતરના ખ્યાલનો એક વિશ્લેષણાત્મક અભ્યાસ

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IMPACT ANALYSIS OF DIGITAL MARKETING: AN INDIAN PERSPECTIVE

The increasing use of digital media by consumers, companies utilizes digital marketing to outreach their market segments. The purpose of this study is to determine marketing strategies commonly utilized in digital communication and identify the preferred by consumers which influences decision making. Consumers have been identified as a driving force for online shopping. While there have been numerous studies about digital advertising, there has been little academic research focused on type of digital marketing strategies are preferred and influences their consumer’s behavior. A survey of 225 consumes indicated a preference for side panel ads and email ads; they do not like pop – up advertising. If provided a personal benefit like discount or reward they will write an online product review

Bacteriological profile and antibiotic susceptibility pattern of neonatal septicaemia in patients of neonatal intensive care unit, by BACTEC in a tertiary care hospital, Vadodara

Background: Neonatal septicemia is the major cause of mortality and morbidity in developing countries like India. It is an ongoing major global public health challenge with major contribution from neonatal sepsis. Objective were to study the prevalent organisms and their antibiotic susceptibility pattern of neonatal septicemia in NICU by BACTEC and neonatal factors and maternal factors associated with neonatal sepsis. Methods: A cross-sectional study was carried out from December 2020 to September 2021. Blood samples were taken from the suspected cases admitted to NICU for culture and antimicrobial susceptibility test. A total of 103 blood culture-proven neonatal sepsis patients were enrolled in this study. Results: Out of 103 neonates having blood culture-proven sepsis, septicemia was most common in males (53.4%), preterm (73.4%), and low birth weight (61.2%), with vaginal mode of delivery (51.5%). Neonatal septicemia was predominantly caused by gram-positive methicillin resistant coagulase negative Staphylococci (CONS) (28.15%). Among the all-gram-positive organism, vancomycin was the most sensitive drug followed by linezolid. For the gram-negative organisms, piperacillin/ tazobactam was the most sensitive drug followed by meropenem. Turnaround time of an automated BACTEC system for reporting culture positivity along with antimicrobial susceptibility was most commonly within 3 days (55.34%). Conclusions: A high level of suspicion is needed on clinical grounds for the diagnosis of neonatal septicemia. Early onset septicemia is more common which can be curtailed by clean vaginal deliveries. Prematurity and low birth remain the major presentation for admission to NICU followed by respiratory distress syndrome. Maternal risk factors are associated with an increase in the incidence of neonatal septicemia. Septic screen markers are important in the presumptive diagnosis of sepsis in neonates along with the correlation of clinical presentation. The yield of reporting culture-proven sepsis neonates is more rapid with an automated BACTEC system as compared to conventional blood culture methods

On the experiments of Surfatron concept with use of capillary plasma.

In the middle of 1980th, the VpxB concept for accelerating electrons are found by Nishida et al, with the use of plasma wave excited by high power microwave in the interaction with weakly magnetized plasma. This acceleration concept was called “Surfatron effect” in the relativistic regime. However, there is no experimental evidence so far in the relativistic regime, although the acceleration efficiency is highest in all of the concepts based on the plasma wave acceleration scheme, and we are now under experiments. In order to make longer the acceleration distances, there are several ideas including 1)ducting of the electromagnetic waves (EM wave) in the preformed plasma, 2)selfchanneling of the EM waves, and others. In this paper, the experimental results are shown on the ducting phenomena by using strong microwave for simulating the laser ducting, and on the capillary plasma scheme

A case report on retrieval of retained guidewire- a rare complication after central venous catheterization

Central venous catheterization (CVC) is a routine technique which is widely used in fluid resuscitation, parenteral nutrition, haemodialysis and continuous invasive hemodynamic monitoring. CVC via the Seldinger technique is a minimally invasive procedure which is increasingly and widely performed. Popularity of the Seldinger technique of vascular cannulation has resulted in widespread use of spring guide wires. Though employed to make vascular cannulation easier and safer, guide wires are not without potential hazard. While the complication rate of inserting CVC catheters is approximately 11.8%, the intravascular loss of the guide wire during CVC placement is a rare but serious complication which is completely avoidable by appropriate care.

A comparative study of use of negative drain in lichenstein repair for large inguinal hernia repair

Background: Recently, with more attention to patient outcomes, post-operative seroma has noted as complication after open inguinal hernia repair. The main aim of the study was to compare and correlate the therapeutic effectiveness of negative suction drain versus no drain in large inguinal hernia repair.Methods: The present study is a randomized study of 400 cases of inguinal hernias admitted in PDU Government Medical College and Hospital, Rajkot, during the study period of April 2012 to March 2015. The cases for the purpose of the study were selected on the basis of the random sampling method and after taking valid informed consent.Results: The drains were used in 120 of 280 open mesh repairs of inguinal hernias. The patients who had drains were older, had cardiovascular disease, higher ASA class, and received anticoagulant regimens more often, had indirect type hernia more often, more commonly had emergency operations, had complicated presentations such as incarceration and strangulation, therefore had resections more often, had local complication such as hematoma, had longer duration of operation.Conclusion: Drain is more commonly used in patient who had more dissection and longer duration of operation. Drain used in selected patients seems to not increase infection risk but associated with longer hospital stay.

A prospective study of USG guided pigtail catheter drainage in management of liver abscess

Background: Treatment of the liver abscess of any etiology has evolved in the recent years. Percutaneous drainage of liver abscess has been an important advancement in the treatment of pyogenic liver abscesses. Aim: to evaluate and assess response, morbidity and complication rates of percutaneous pig tail catheter drainage in treatment of liver abscess.  Methods: During a period of 27 months, 25 patients with liquefied liver abscess ≥5x5 cm underwent percutaneous drainage under sonographic guidance.Results: 18 had solitary abscess, while 7 had multiple abscesses. Pigtail catheters of various sizes (10 F or 12 F) were introduced in these patients using the Seldinger technique. The volume of pus drained ranged from 150 to 400 ml, while the period of catheter drainage ranged from 6 to 17 days. Complications were minor and included catheter blockage in 2 patients and tract pain in 8 patients. There was no mortality associated with this procedure. This study shows a success rate of 96% (successful treatment in 24 out of 25 patients).Conclusion: Percutaneous catheter drainage of liver abscesses is successful with a low morbidity and mortality and should be the first line of management in liquefied moderate to large sized liver abscesses.