AstroStat—A VO tool for statistical analysis

AstroStat is an easy-to-use tool for performing statistical analysis on data. It has been designed to be compatible with Virtual Observatory (VO) standards thus enabling it to become an integral part of the currently available collection of VO tools. A user can load data in a variety of formats into AstroStat and perform various statistical tests using a menu driven interface. Behind the scenes, all analyses are done using the public domain statistical software—R and the output returned is presented in a neatly formatted form to the user. The analyses performable include exploratory tests, visualizations, distribution fitting, correlation & causation, hypothesis testing, multivariate analysis and clustering. The tool is available in two versions with identical interface and features—as a web service that can be run using any standard browser and as an offline application. AstroStat will provide an easy-to-use interface which can allow for both fetching data and performing power statistical analysis on them

A rare myoepithelioma of the sinonasal cavity: case report

Myoepithelioma is a rare benign neoplasm. Pure accounting for less than 1% of all salivary gland tumors. Only three cases of sinonasal myoepithelioma have been reported in the literature. Diagnosis of myoepithelioma through light microscopy is possible and immunohistochemistry is done to facilitate the diagnosis. The lesion is so rare that there are no specific indications/guidelines for its treatment. We report to you a rare case of sinonasal myoepithelioma in a 57 year old Asian female

A brief review of voice restoration following total laryngectomy

Despite advances in conservative laryngeal surgery and radiotherapy, total laryngectomy still remains the procedure of choice for advanced-stage (UICC T3 and T4) laryngeal carcinoma, around the world. The functional rehabilitation of the laryngectomized patients has been a concern of head and neck surgeons and speech therapists. Significant developments in speech rehabilitation over the past three decades have led to substantial improvements in the quality of life of these patients. The tracheoesophageal (TE) voice prosthesis has become the gold standard in various centers for voice rehabilitation since its introduction in 1980. Successful tracheoesophageal voice restoration in laryngectomy patients can be very rewarding and patients no longer have to live in silence while they await the results of their cancer treatments. They can face the challenges of life with the knowledge that a near normal quality of life is very much possible.In this article, we present a brief review of voice restoration following laryngectomy

A brief review of voice restoration following total laryngectomy

Despite advances in conservative laryngeal surgery and radiotherapy, total laryngectomy still remains the procedure of choice for advanced-stage (UICC T3 and T4) laryngeal carcinoma, around the world. The functional rehabilitation of the laryngectomized patients has been a concern of head and neck surgeons and speech therapists. Significant developments in speech rehabilitation over the past three decades have led to substantial improvements in the quality of life of these patients. The tracheoesophageal (TE) voice prosthesis has become the gold standard in various centers for voice rehabilitation since its introduction in 1980. Successful tracheoesophageal voice restoration in laryngectomy patients can be very rewarding and patients no longer have to live in silence while they await the results of their cancer treatments. They can face the challenges of life with the knowledge that a near normal quality of life is very much possible.In this article, we present a brief review of voice restoration following laryngectomy

Deep co-added sky from Catalina Sky Survey images

A number of synoptic sky surveys are underway or being planned. Typically, they are done with small telescopes and relatively short exposure times. A search for transient or variable sources involves comparison with deeper baseline images, ideally obtained through the same telescope and camera. With that in mind, we have stacked images from the 0.68 m Schmidt telescope on Mt. Bigelow taken over 10 yr as part of the Catalina Sky Survey. In order to generate deep reference images for the Catalina Real-time Transient Survey (CRTS), close to 0.8 million images over 8000 fields and covering over 27 000 sq. deg have gone into the deep stack that goes up to 3 mag deeper than individual images. CRTS system does not use a filter in imaging; hence, there is no standard passband in which the optical magnitude is measured. We estimate depth by comparing these wide-band unfiltered co-added images with images in the g band and find that the image depth ranges from 22.0 to 24.2 across the sky, with a 200-image stack attaining an equivalent AB magnitude sensitivity of 22.8. We compared various state-of-the-art software packages for co-adding astronomical images and have used swarp for the stacking. We describe here the details of the process adopted. This methodology may be useful in other panoramic imaging applications, and to other surveys as well. The stacked images are available through a server at Inter-University Centre for Astronomy and Astrophysics. © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.Immediate accessThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]