St. Mother Theresa Engineering College (SMTEC), Vagaikulam in Tuticorin, Tamil Nadu, India is a self-financing engineering college run by the SCAD(Social Change And Development) group of institutions. The institution is approved by AICTE and affiliated with Anna University, Chennai. The college was established in 2009 with innovative effort for providing technical education to rural people of Tuticorin district by Dr.S.Cletus Babu and Dr.J.X Amali Cletus Babu. SMTEC started its function with 157 students and 47 staffs offering five Engineering Degree courses B.E in Mechanical Engineering, B.E in Electronics and Communication Engineering, B.E in Electrical and Electronics Engineering and B.E in Civil Engineering. In the year of 2011 B.E in Computer Science and Engineering is also added to MTEC with a change of intake(120 students/Branch) to the department of Electronics and Communication Engineering, Mechanical Engineering and Civil Engineering. The intake for Aeronautical Engineering has been stopped from June 2016 onwards. The college is located at the center of Tirunelveli-Thoothukudi National Highway(NH 7A). The notable landmarks are the Tuticorin Airport and Capsi restaurant. SMTEC ranks first among its sister institutions Francis Xavier Engineering College, SCAD Engineering College and 105 rank among the 516 self-financing institutions under the Anna University in terms of university examination results November–December 2015.Also there are a notable number of Malayali students in every departments pursuing their degree at SMTEC.S..
In Very Large Scale Integrated Circuits, the Built in Self-Test (BIST) is intended to minimize power consumption while providing fault coverage. Weighted pseudorandom (W-Pr) BIST mechanism is employed to minimize the several vectors requirement for attaining entire fault coverage. The weights 0, 0.5 and 1 are included in the weight sets so far to create test patterns for reducing the duration of testing and amount of energy consumed. LP-LFSRs, or Low Power Linear Feedback Shift Registers, are used in this study for creating test patterns. A single input change (SIC) pattern is created when seeds from an LP-LFSR are Exclusive ORed with a Grey code (GC) generator and counter. The inclusion of accumulators, which are widely found in current VLSI chips, effectively lowers the amount of hardware needed for the production of BIST patterns when using this technique. Modelism 6.4c is used to validate the suggested technique and Verilog HDL is used to simulate it. The simulation results exhibit that the power consumed for testing utilizing the recommended architecture is significantly decreased.
The low freshwater productivity of conventional solar stills remains a major limitation for their large-scale application in sustainable desalination. The present study experimentally investigates the thermal intensification of a four-basin stepped solar still through three passive enhancement strategies: (i) passive cooling tower integration for improved condensation, (ii) wick-assisted evaporation enhancement, and (iii) a hybrid configuration combining both techniques. The cooling tower reduced the inner glass temperature by approximately 5–9 °C, while the wick material enhanced basin water heating through thin-film evaporation. Experimental investigations were conducted under identical climatic conditions, and thermal behaviour, productivity, and efficiency were systematically evaluated. The results demonstrated that the conventional system produced 20.305 L day−1 of freshwater, whereas the cooling tower and wick-assisted configurations achieved 23.82 and 22.95 L day−1, respectively. The hybrid configuration achieved the highest productivity of 26.40 L day−1, a 30
Experimental and theoretical investigations on the structural, supramolecular, and electronic characteristics of 3-benzoyl-7-methoxy-2H-chromen-2-one (BMC) were conducted. Single-crystal X-ray diffraction analyses demonstrated a nearly planar coumarin structure accompanied by a twisted benzoyl moiety. Feeble C-H & centerdot;& centerdot;& centerdot;O, C-H & centerdot;& centerdot;& centerdot;pi, and carbonyl interactions stabilize the crystalline arrangement. pi interactions facilitate the formation of one-dimensional supramolecular chains. The Hirshfeld surface and energy framework analyses indicated that H & centerdot;& centerdot;& centerdot;H, H & centerdot;& centerdot;& centerdot;C/C & centerdot;& centerdot;& centerdot;H, and H & centerdot;& centerdot;& centerdot;O/O & centerdot;& centerdot;& centerdot;H interactions are the primary contributors to the crystal structure, whereas dispersion interactions play a significant role in stabilization. DFT simulations aligned with the experimental shape, demonstrating modest chemical stability and potential biological significance.
Water scarcity has become a major global concern due to increasing population growth, industrialization, and depletion of freshwater resources. Solar desalination is considered an eco-friendly and sustainable solution, especially for rural and off-grid regions where conventional water treatment facilities are limited. However, conventional solar stills suffer from low productivity, which restricts their practical application. In this study, a fully integrated solar still system was designed and fabricated by incorporating a flat plate collector, front-wall reflector, and passive evaporative cooling arrangement. The system was experimentally tested under natural climatic conditions over seven consecutive days to evaluate temperature variation, distillate yield, and overall system performance. Key parameters such as basin temperature, glass temperature, water temperature, and hourly freshwater production were monitored and analyzed. The experimental results showed significant improvement in freshwater productivity compared to conventional solar stills. The fully integrated system achieved a maximum distillate yield of 6000 ml/m²/day, which is nearly two times higher than the conventional system. The enhanced performance is mainly attributed to improved solar absorption, efficient evaporation, and enhanced condensation mechanisms, demonstrating the effectiveness of the integrated solar still design.
In the era of scarcity in water, climate variability, and increasing demand for freshwater have intensified the need for sustainable desalination technologies. Solar desalination is attractive because it uses renewable solar energy, but the productivity of conventional solar stills remains limited. This study presents an IoT-integrated double-basin solar still incorporating a graphene-coated carbon aerogel-impregnated basalt fiber felt (G/CA-BFF) composite basin liner, external reflectors, and a flat-plate collector (FPC). Experiments were conducted outdoors from March to October 2025 under an average solar radiation of approximately 840 W/m². An IoT based system was used to monitor solar radiation, basin-water and glass-cover temperatures, ambient temperature, relative humidity, water level, and freshwater yield. The conventional double-basin solar still (DBSS) produced 4333 mL/day, while DBSS + FPC and DBSS + ER produced 4500 and 5650 mL/day, respectively. The combined DBSS + ER + FPC configuration produced 6249 mL/day, corresponding to a 44.22% increase over the conventional DBSS. The combined configuration also exhibited higher basin-water temperature and thermal efficiency under the investigated conditions. A preliminary techno-economic assessment estimated a simple payback period of 1.23 years based on an assumed freshwater value of ₹10/L and a 365-day operating period. The results demonstrate the potential of the integrated material–thermal–IoT architecture for solar desalination under outdoor conditions, while detailed component-level costing, uncertainty analysis, and long-term durability assessment remain necessary for scale-up.
