45 research outputs found
A Neuro Fuzzy Algorithm to Compute Software Effort Estimation
Software Effort Estimation is highly important and considered to be a primary activity in software project management The accurate estimates are conducted in the development of business case in the earlier stages of project management This accurate prediction helps the investors and customers to identify the total investment and schedule of the project The project developers define process to estimate the effort more accurately with the available mythologies using the attributes of the project The algorithmic estimation models are very simple and reliable but not so accurate The categorical datasets cannot be estimated using the existing techniques Also the attributes of effort estimation are measured in linguistic values which may leads to confusion This paper looks in to the accuracy and reliability of a non-algorithmic approach based on adaptive neuro fuzzy logic in the problem of effort estimation The performance of the proposed method demonstrates that there is a accurate substantiation of the outcomes with the dataset collected from various projects The results were compared for its accuracy using MRE and MMRE as the metrics The research idea in the proposed model for effort estimation is based on project domain and attribute which incorporates the model with more competence in augmenting the crux of neural network to exhibit the advances in software estimatio
Achalasia and hyperthyroidism: A cooccurrence revealing autoimmune connections
Achalasia is a rare esophageal motility disorder characterized by an unknown etiology, myenteric inflammation, and autoimmune markers. We present a case of a 43-year-old female with progressive dysphagia, regurgitation, generalized
weakness, and hair loss. Despite normal cranial nerves and normal laboratory values, upper GI endoscopy revealed pangastritis, while manometry indicated type 2 achalasia cardia. The patient underwent laparoscopic Heller's myotomy for achalasia and received treatment for hyperthyroidism. The discussion explores the autoimmune aspects of achalasia and its rare association with hyperthyroidism. Early diagnosis and management are crucial for improving patient outcomes
Kinetics of addition of thiophenol to <i>para-</i>substituted Ī²-nitrostyrenes and Ī²-methyl-Ī²-nitrostyrenes
1943-1949The kinetic studies of the nucleophilic
addition of thiophenol (PhSH) to para-substituted derivatives of Ī²-nitrostyrene (Ī²NS) and Ī²-methyl-Ī²-nitrostyrene
(Ī²MĪ²NS) have
been investigated spectrophotometrically in 50%(v/v) acetonitrile-water at
four different temperatures. The reaction follows first order with respect to
each substrate and fractional order with respect to thiophenol in both
the cases. On the basis of kinetic results, a stepwise mechanism involving the
formation of zwitterionic addition complex in an equilibrium step followed
by its conversion into product via proton transfer catalytic route by
the thiophenol has been proposed for Ī²-nitrostyrene
and
non-catalytic proton transfer has been proposed for Ī²-methyl-Ī²-nitrostyrene. Based on the rate law
derived, a plot of [PhSH]/kobs against 1/[PhSH] is linear for
Ī²-nitrostyrene and a plot of 1/kobs
against 1/[PhSH] is linear for Ī²-methyl-Ī²-nitrostyrene.
The effect
of solvent composition on the reaction rate indicates
that the increase in the polarity of the
medium increases the reaction rate in both reaction series. The study of the
effect of substituents in the two reaction series shows that the
electron-withdrawing substituents accelerate the reaction rate and the
electron-releasing substituents retard it. Good Hammett correlations have been
observed for both the series
Nanocomposite TiāSiāN Coatings Deposited by Reactive dc Magnetron Sputtering for Biomedical Applications
Nanocomposite TiāSiāN coatings were prepared by reactive dc
magnetron sputtering in a mixture of Ar and N2 gases onto bio
implantable 316L stainless steel substrates. X-ray diffraction
analysis revealed that the TiāSiāN nanocomposite coatings are
mainly composed of amorphous Si3N4 and TiN crystals. The
presence of different phases like TiN, TiO2, and Si3N4 was
confirmed from X-ray photoelectron spectroscopy analysis.
Raman spectra of the as-deposited composite coatings exhibited
characteristic peaks at 207.5, 305.8, 442.5, and 571.8
cm
ļæ½1. HRTEM indicated columnar microstructure. A higher
hardness value of 35 GPa for the nanocomposite coatings was
observed. The potentiodynamic polarization and electrochemical
impedance spectroscopy measurements showed that the
TiāSiāN nanocomposite coatings exhibited superior corrosion
resistance compared with the Si3N4, TiN single layer, and the
bare substrate in simulated body fluid solutio
Titanium oxynitride coated graphite paper electrodes for light-weight supercapacitors
The rapid development of smart electronics devices has stimulated intensive research on flexible supercapacitors with high mechanical tolerance and energy density. Up to date, most of the asymmetric devices are fabricated using carbon-based materials as negative electrode materials. However, the lower capacitance of carbon-based materials limited its applicability widely. Also, the device unavoidably carries unnecessary mass and volume, leads to poor contact and performance to repeated bending of devices, and occupies more space in the electronics devices. Herein, we prepared flexible, light-weight, and thin graphite paper current collectors to fabricate flexible supercapacitors. Further, the titanium oxynitride (TiOxNy) coatings were deposited by DC magnetron sputtering over a flexible and light-weight graphite substrate as a potential negative electrode. The presence of nitrogen content in transition metal oxynitrides adds wettability to the material; hence more electrolyte ions get adsorps onto the surface of the electrode owing to their hydrophilic nature. The resultant TiOxNy/graphite electrode exhibited a high areal capacitance of 62 mF cmā2 and also showed 100% capacitance retention even after 1500 GCD cycles. The results of a series of tests indicated that the flexible electrode has better capacitive performance, suggesting that as-prepared film is a favorable candidate for light-weight and flexible supercapacitors.publishe