Cystic swellings of scrotum: Management

The cystic swellings of scrotum are one among the commonest clinical entities faced by a surgeon in day to day practice and a cause of concern to the patient more with his fertility. Presenting with varied etiology they can represent a wide range of medical issues. Gold standard for the management of such cystic swellings of scrotum continues to be surgical extirpation of the lesion. Objective: To identify the cause, mode of presentation, various modalities of treatment and outcome of these with their complications. Method: A total of 170 cases of cystic swellings of scrotum fulfilling the methodology criteria were subjected to the preformatted study. Diagnosis was mostly by clinical examination and supported by ultrasonography. All cases were treated surgically with the appropriate surgical procedure. Results: Maximum patients were in the age group of 31-50 years and presented with scrotal swelling (59%) and more commonly affecting the right side. The commonest cause for cystic swelling of the scrotum was primary vaginal hydrocele (55%). Surgical procedure using Lords Plication was found to be simple, effective and associated with minimum post operative complications; the other conventional techniques like Partial/sub-total excision of sac, everson of sac were associated with more complications like haematoma, scrotal edema and infection. Majority of patients were discharged on 7th Post-operative day. Conclusion: The present study, primary vaginal hydrocele was the commonest cystic swelling of scrotum and treated surgically showed good results. Lord’s procedure was associated with the less post-operative complications, minimal tissue handling and good haemostatic control

Scope for light assisted fishing in Southeastern Arabian Sea

Scope for light assisted fishing in Southeastern Arabian Se

Effect of Anisotropy, Temperature, Strain Rate on Deep Drawing Using Conical Die

This paper covers the role of anisotropy, temperature, and strain rate on the flow behavior of the material when a conical die is used instead of conventional blank holder. The effect of anisotropy was investigated using Lankford’s coefficient (r) in three directions (0°, 45°, and 90°). The effect of working temperatures (Room temperature, 100°C - 300°C) on drawing stress and strain rate sensitivity on punch pressure were also investigated in detail. ANSYS APDL was used to investigate the effects of temperature, strain rate and anisotropy. The simulation results have confirmed that the strain variation in the direction of r0 and r45 are more than the variation of r90

KnowText: Auto-generated Knowledge Graphs for custom domain applications

While industrial Knowledge Graphs enable information extraction from massive data volumes creating the backbone of the Semantic Web, the specialised, custom designed knowledge graphs focused on enterprise specific information are an emerging trend. We present “KnowText”, an application that performs automatic generation of custom Knowledge Graphs from unstructured text and enables fast information extraction based on graph visualisation and free text query methods designed for non-specialist users. An OWL ontology automatically extracted from text is linked to the knowledge graph and used as a knowledge base. A basic ontological schema is provided including 16 Classes and Data type Properties. The extracted facts and the OWL ontology can be downloaded and further refined. KnowText is designed for applications in business (CRM, HR, banking). Custom KG can serve for locally managing existing data, often stored as “sensitive” information or proprietary accounts, which are not on open web access. KnowText deploys a custom KG from a collection of text documents and enable fast information extraction based on its graph based visualisation and text based query methods

Failure of evaporator tubes initiated by lamellar tearing during the commissioning of a waste heat recovery boiler

Successive failures of several new evaporator tubes during commissioning and trial run of a waste heat recovery boiler has been analyzed. The evaporator tubes are cold bent into U-shape and subsequently TIG welded to a 24-mm thick wear plate on either sides of the tube immediately adjacent to the bend. The failed samples showed stepped longitudinal cracks along the rolling direction and parallel to the weld fusion boundary at the fireside surface of the inner bend of the tube,prominently at the center of the bend. It was found that the failure of the evaporator tubes at the tube bends was initiated by lamellar tearing because of inherent defects in the material (segregation leading to banded structure), improper processing of material (inclusions with high aspect ratios along the rolling direction) and accelerated by high transverse shrinkage stresses over the entire bend portion of the tube introduced by the weld. The pre-existing fine cracks in the welded evaporator tube initiated by lamellar tearing have subsequently opened up during service when the total strain in the region increased because of steam pressure resulting in catastrophic failure of the tubes. Contrary to expectation, many of the elongated inclusions were found to be iron oxide scales and only few were manganese sulfide stringers enveloped by iron oxide scales. The iron oxide inclusions were resolved from the manganese sulfide by scanning electron microscopy and EDS spot analysis of the inclusions

പടന്നയിലെ കല്ലുമ്മക്കായ കൃഷിനാശം : കൃഷി വീണ്ടെടുക്കാൻ ചില നിർദേശങ്ങൾ 2016 - 17 ൽ CMFRI നടത്തിയ പഠനറിപ്പോർട്ടിന്റെ പ്രസക്തഭാഗങ്ങൾ

പടന്നയിലെ കല്ലുമ്മക്കായ കൃഷിനാശം : കൃഷി വീണ്ടെടുക്കാൻ ചില നിർദേശങ്ങൾ 2016 - 17 ൽ CMFRI നടത്തിയ പഠനറിപ്പോർട്ടിന്റെ പ്രസക്തഭാഗങ്ങ

An Interconnected Wind Driven SEIG System Using SVPWM Controlled TL Z-Source Inverter Strategy for Off-Shore WECS

This paper discuss about  the interconnection of wind driven SEIG for drive applications by using TL Z-source inverter strategy .TL Z-source consists of two coupled inductors having turns ratio γTL and four diodes are used . The wind energy system uses a two Self Excited Induction generator (SEIG) connected parallel in order to increase the reliability. The proposed system components like wind turbine SEIG, rectifier, SVM Controlled TL Z-source inverter, are modeled by matlab Simulink. The maximum power can be extracted and supplied to the load efficiently by using TL Z-source inverter with a proper value of modulation index. The simulation output is analysed experimentally using 500 W experimental setup

Comparative Evaluation of Generalized Multicell Impedance Source Inverter for Drives

Voltage-Source Inverter is limited by its only voltage step-down operation. In adding with extra boosting the flexibility is kept active for  the number of  semiconductors which is unchanged, voltage-type Z-source inverter was earlier proposed. These new classes of inverter is generally less sensitive to electromagnetic noises. However, their boosting capabilities are anyhow less with high component stresses and poorer spectral performances caused by low modulation index ratios. Their boosting gains are, therefore, restricted in practice. To overcome these we use the generalized switched-inductor Z-source inverter is proposed, By comparing with PWM technique and SPWM technique, whose extra boosting abilities and other advantages have been verified in simulation analysis and experiment.DOI: http://dx.doi.org/10.11591/ijpeds.v4i2.512

Where does the energy go in high energy milling?

An attempt is made to analyze as to how the energy is dissipated, stored and distributed in the material during the process of high energy milling. The manifestation of the enhanced potential energy in different forms (point, line and volume defects, surfaces and interfaces, strain and structural disorder) is determined through direct energy measurements, calorimetry, surface area and surface energy measurements. Xray line broadening analysis employing the Hall-Williamson method is used to estimate the non-uniform elastic strain and grain size and the extent of structural disorder is evaluated from integral peak areas of XRD. A close packing of crystallites approximating a tetrakai-decahedron configuration is used to calculate the grain boundary area. The strain energy is calculated using the theory of elasticity. The energy of amorphisation is calculated from the enthalpy of fusion and specific heats of solid and liquid. Mechanical activation of zircon is chosen for the study of the energetics of the process. For the milling of zircon, the energy transferred to the material is found to be 13% of the specific energy input in 6 h of milling in a planetary mill. It is observed that a large part of the energy transferred to the material is lost during the breaking of the bonds and only a small fraction goes towards enhancing the potential energy mainly as elastic strain energy and structural disorder. The energy stored in point and line defects, additional surfaces and grain boundaries are comparatively lesser

Cephalopod Growth in the Fisheries Context In: ICAR Sponsored Winter School on Recent Advances in Fishery Biology Techniques for Biodiversity Evaluation and Conservation, 1-21 December 2018, Kochi.

Cephalopods comprising of squids, cuttlefish and octopus, have emerged as commercially important marine resources of the world. Cephalopod abundance has increased over the last six decades, resulting in quadrupling in landings from 1 to 4.71 million tonnes (2015). Many countries have initiated stock monitoring programs of this resource because of the increasing trends in their annual catches. The age composition and growth rate of fishery stocks are among the most important parameters for studying population biology, stock structure, life span and eventually for monitoring and managing the stocks appropriately