A Sociological Perspective about Marutham Regional People

When we closely approach the lifestyle of the people of the Sangam period, the people of that time have their own lifestyles and occupations according to the backgrounds of five landforms Kurinji, Mullai, Marutham, Neithal and Paalai. The lifestyle and culture of the people of these five lands have the common elements of the people of the Sangam period, but when we approach these subtly, it is possible to know that each land's people operate with their own unique lifestyle norms, social structure, and cultural elements. The people of Marutham land, who know the occupation of plowing, do not know occupations like robbery and murder that was followed by Paalai land people.  The people of the Nellai land who caught fish in the sea do not know the professions like rice paddy and weeding. Each land people have their own unique land identity, occupation, lifestyle, worship, ritual, customs, food, dress, clothing, etc. The hypothesis of this article is to examine the life style of Marutham land people as described in Ettuthogai anthology take the way of life of the people of Marudham lands and describes about the high cultural thoughts of Tamil people

Technologies for High Power Density Diesel Engines

The engines used in armoured fighting vehicles have to be compact, light in weight, efficient and reliable. In order to achieve a compact engine design, a complete understanding of all the factors affecting the engine performance is needed. However, it is important to note that the performance of the engine cannot be compromised in the pursuit of compactness. The aim of this paper is to classify systematically various broad areas affecting the engine’s power to weight and power to volume ratio and discuss respective current technologies available. This paper explores the possibility of size and weight reduction and efficiency enhancement of diesel engines by the use of various methods like engine friction reduction, better thermal management, high injection pressure, and turbocharging. Achieving high engine speeds and high BMEP will be the means of achieving high power density. The effects of engine configuration and technologies on compactness are also discussed. Finally, the configuration of a new engine and its design aspects, incorporating all the aforementioned concepts is discusse

Practices towards prevention of food borne diseases among females in rural area of Trichy, India

Background: Food borne diseases are of great importance since it leads to multiple health problems resulting in illness, malnutrition, mortality and economic loss. These diseases share a significant proportion in the occurrence of communicable diseases. Objectives was to study the knowledge about food borne diseases and food safety among women residing in rural area.Methods: This was a cross sectional study involving 150 adult females who were residing in rural field practice areas of a tertiary care teaching hospital. Practices of safe food handling were assessed using an interviewer administered questionnaire. Informed consent was obtained, and confidentiality was maintained. Appropriate descriptive statistical analysis was done.Results: Out of 150 females, 147 (98%) were aware of the importance of washing hands before cooking. Sixty four (42.7%) females had a habit of washing the vegetables with water twice before cooking. 102(68%) females consumed stored food after reheating, 48(32%)females consumed without heating. Though 70% were aware of food adulteration, none of the participants have lodged compliant against adulteration.Conclusions: Through our study we found that most of the females practiced proper hand washing before cooking and proper storage of the leftover food. The proportion of females who followed adequate cleaning of non-vegetarian food items and vegetables were found to be inadequate.

Performance Characteristics of Electrochemical Micromachining on Pure Titanium using coated tool electrode

Owing to its hardenable nature and corrosive resistant, Titanium is mainly utilized in fabricating turbine blade applications. Since it is very tough to creating the complex shape on this material by using traditional machining process. Generally micro holes are produced over the turbine blades to reduce the heat using EDM and LBM process. These processes can produce a heat affected zone over the machining surface and higher operating cost. The target of this present study was to make a micro hole on titanium by using electro chemical micro machining process and also attempt to identify the performance of nickel coated copper electrode for embellishing the ECM process. Since the process involves with no tool wear and less heat affect zone, it is possible to improve the machinability of the material. Titanium specimens have been machined using ECM process with uncoated copper electrode and nickel coated electrode under different process parameters combinations. From the experimental results, the better MRR and surface finish were observed from the nickel coated copper electrode

Effect of Process Variables on Electrochemical Micromachining of Titanium Alloy (Ti-3Al-2.5V)

Electro-chemical Machining (ECM) is mainly used for shaping, deburring, milling and finishing operations in various precision industries and its use in micron level machining is called Electro-Chemical Micro Machining (EMM). EMM and ECM are receiving considerable attention from high-tech industries. It is because it allows to manufacture structures of complex shapes, it has high precision and accuracy, it is simpler and eco-friendly manufacturing technique and it can be used for different conducting materials. Different industry working with water which is saline, needs heat exchanger for the process. Titanium Alloy (Ti-3Al-2.5V) due to its high corrosion resistance under saline conditions is preferred by these industries. This present work is mainly concentrated on identifying the Material Removal rate (MRR) of Titanium Alloy (Ti-3Al-2.5V) workpiece by varying the process parameters like voltage, electrolyte concentration and duty cycle on electro-chemical micro machining

Robust detection and classification of biomedical cell specimens from light microscope images

Ph.DDOCTOR OF PHILOSOPH

Direct correlation between the circadian sleep-wakefulness rhythm and time estimation in humans under social and temporal isolation

Several bodily functions in humans vary on a 24 h pattern and most of these variations persist with a circadian period of ca 25 h when subjects are studied under conditions of social and temporal isolation. We report in this paper that the estimates of short time intervals (TE) of 2 h are strongly coupled to the circadian rhythm in sleepwakefulness. There is a linear correlation between the number of hours humans stay awake (α) and their estimation of 2 h intervals. The coupling of TE to α appears to obtain only under conditions of physical well-being

Development of a Fuel Quantity based Engine Control Unit Software Architecture

   Conventionally diesel engines are controlled in open loop with maps based on engine speed and throttle position wherein fuel quantity is indirectly fixed using the rail pressure and injection duration maps with engine speed and throttle position as the independent variables which are measured by the respective sensors. In this work an engine control unit (ECU) software architecture where fuel quantity is directly specified in relation to the driver demand was implemented by modifying the control logic of a throttle position based framework. A desired fuel quantity for a given engine speed and throttle position was mapped from base line experiments on the reference engine. Injection durations and rail pressure required for this quantity was mapped on a fuel injector calibration test bench. The final calculation of injection duration in the new architecture is calculated using the fuel injector model. This enables determination of fuel quantity injected at any moment which directly indicates the torque produced by the engine at a given speed enabling smoke limited fuelling calculations and easing the implementation of control functions like all-speed governing

What Do Safety Data Sheets for Artificial Stone Products Tell Us About Composition? A Comparative Analysis with Physicochemical Data

Artifcial stone (AS) is a composite material that has seen widespread use in construction, particularly for kitchen benchtops. However, fabrication processes with AS have been associated with serious lung disease. Safety data sheets (SDSs) aim to provide important information pertaining to composition and health risks. In the case of a complex mixture, SDSs may be problematic in terms of specifc information on overall health risks. To assess this issue, we compared empirically determined mineral, metallic, and organic resin content of 25 individual AS products across six suppliers, with the corresponding SDS information. X-ray diffraction was used to quantitate the mineralogical components of AS samples, and X-ray fuorescence was used to estimate the metallic components. Organic material (resin content) was estimated using weight loss during calcination. Although the resin content for all AS samples was within the SDS-reported ranges, there was considerable variability in the crystalline silica content when comparing with supplier’s SDS. Potentially toxicologically relevant metallic and mineral constituents were not reported. Some supplier SDSs were found to provide more information than others. Only one of the six suppliers provided crystalline mineral content other than silica, and only two suppliers provided any information about metals. There remains a limited understanding of lung pathogenesis from AS, and this study highlights the need for more comprehensive and standardized SDS information for risk assessment and management.Chellan Kumarasamy, Dino Pisaniello, Sharyn Gaskin, and Tony Hal