Inundation mapping – a study based on December 2004 Tsunami Hazard along Chennai coast, Southeast India

Tsunami impact study has been undertaken along Chennai coast starting from Pulicat to Kovalam. The study area Chennai coast is mainly devoted to prepare large scale action plan maps on tsunami inundation incorporating land use details derived from satellite data along with cadastral data using a GIS tool. Under tsunami inundation mapping along Chennai coast an integrated approach was adopted to prepare thematic maps on land use/land cover and coastal geomorphology using multispectral remote sensing data. The RTK dGPS instruments are used to collect elevation contour data at 0.5 m intervals for the Chennai coast. The GIS tool has been used to incorporate the elevation data, tsunami inundation markings obtained immediately after tsunami and thematic maps derived from remote sensing data. The outcome of this study provides an important clue on variations in tsunami inundation along Chennai coast, which is mainly controlled by local geomorphologic set-up, coastal zone elevation including coastal erosion protection measures and near shore bathymetry. This study highlights the information regarding most vulnerable areas of tsunami and also provides indication to demarcate suitable sites for rehabilitation

EFFECT OF SALINITY GRADIENT SOLAR POND UPON ADDITION OF CaCO3

This study involves the experimental optimisation of the performance of with and without adding CaCO3 in solar pond. The experiment was carried out at Government College of Engineering, Salem, India. Readings were taken for a period of 10 days. The temperature distribution and the amount of heat energy stored were evaluated. For comparison of ambient temperature and three convective zones temperature, the solar pond of volume 0.176 m3 and height of 0.45 m was constructed. The shape of the solar pond is trapezoidal and the inclination angle of the pond is 56º. The temperatures of the solar pond with and without adding CaCO3 were obtained as 50.7º C and 46º C respectively. The solar pond at lower convective zone (LCZ) indicated an increase of 10.2% in temperature. The difference between the amounts of heat energy stored is 12.6 kJ. From the result it is concluded that by adding CaCO3 increases the temperature of lower convective zone (LCZ) and also increases the amount of heat energy stored in the solar pond

MPPT oscillations minimization in PV system by controlling non-linear dynamics in SEPIC DC-DC converter

Solar PV power generation has achieved rapid growth in developing countries which has many merits such as absence of noise, longer life, no pollution, less time for installation, and ease of grid interface. A maximum power point tracking circuit (MPPT) consists of DC-DC power electronics converters that are used to improve the energy attainment from solar PV array. This paper presents a detailed analysis to control of chaos, a non-linear dynamic in SEPIC DC-DC converter interfaced solar PV system, to minimize the oscillations near to MPP. In SEPIC DC-DC converter, the input inductor current is continuous and capable of sweeping the whole I-V curve of a PV module from open circuit voltage (Voc) to short circuit current (Isc) operating points. To trace the true maximum power point and to nullify the oscillations near to MPP, the yield output voltage needs to ensure period-1 operation

STUDY OF THERMAL STABILITY OF SOLAR POND INTEGRATED WITH SOLAR COLLECTOR

In this study, heat supply to LCZ of a salinity gradient solar pond was evaluated. The dimensions of the rectangular solar pond are 45 cm height, 90 cm length and volume of 0.18225 m3. The main aim is to evaluate the heat storage capacity of the solar pond and to increase its heat storage capacity by using flat plate collectors for a period of 10 days. An in-pond heat exchanger covering the bottom wall area of the pond was installed, and its performance was compared with the traditional in-pond without heat exchangers. Temperature at the LCZ was observed as 48ºC with the bottom heat exchanger and 42.5ºC without exchanger. This indicates an increase in the solar pond efficiency of 12.94 % .The difference between the amount of heat energy stored is 14.44 kJ. The results demonstrate that efficiency of solar pond increases with bottom heat exchanger, when compared to the efficiency of solar pond without bottom heat exchanger

Embedding Wheel-like Networks

One of the important features of an interconnection network is its ability to efficiently simulate programs or parallel algorithms written for other architectures. Such a simulation problem can be mathematically formulated as a graph embedding problem. In this paper we compute the lower bound for dilation and congestion of embedding onto wheel-like networks. Further, we compute the exact dilation of embedding wheellike networks into hypertrees, proving that the lower bound obtained is sharp. Again, we compute the exact congestion of embedding windmill graphs into circulant graphs, proving that the lower bound obtained is sharp. Further, we compute the exact wirelength of embedding wheels and fans into 1,2-fault hamiltonian graphs. Using this we estimate the exact wirelength of embedding wheels and fans into circulant graphs, generalized Petersen graphs, augmented cubes, crossed cubes, Möbius cubes, twisted cubes, twisted n-cubes, locally twisted cubes, generalized twisted cubes, odd-dimensional cube connected cycle, hierarchical cubic networks, alternating group graphs, arrangement graphs, 3-regular planer hamiltonian graphs, star graphs, generalised matching networks, fully connected cubic networks, tori and 1-fault traceable graphs

Biocompatibilidad del titanio en los tejidos orales: una revisión sistemática

Over the past decade, dental implants have gained widespread acceptance and adoption as a solution for replacing missing teeth and supporting various types of dental prostheses, including fixed and partially removable ones. Despite their generally high long-term success rates, with 96.1% survival after ten years and 83.8% after 25 years, implant failures remain a possibility. Major databases such as Medline were explored detailed literature search in resulting in a systematic review pertaining to titanium implants. Six scientific articles dated between 2020 – 2024 pertaining to titanium implants were highlighted. Discussion - Recent years have seen a significant increase in evidence suggesting that inflammation induced by bacterial biofilms around implants can lead to complications affecting both soft and hard tissues, ultimately resulting in implant failure. This inflammatory state is identified as peri-implant mucositis and peri-implantitis, highlighting the importance of vigilant periodontal and prosthetic maintenance in implant care.Este síndrome se asocia a mutaciones en el gen CDC73, que codifica la proteína supresora de tumores parafibromina. Los pacientes suelen presentar síntomas al final de la adolescencia o al principio de la edad adulta, incluyendo hinchazón mandibular, hipercalcemia y complicaciones renales. El diagnóstico precoz es crucial para un tratamiento y una vigilancia eficaces, ya que el síndrome conlleva un riesgo significativo de malignidad. Este síndrome es clínica y genéticamente diferente de otros síndromes de neoplasia endocrina y parece estar causado por mutaciones en un gen asociado con tumores endocrinos, conocido como "HRPT2". Este artículo destaca las características clínicas, la base genética, los criterios diagnósticos y las estrategias de tratamiento para el HPT-JT, y enfatiza la importancia del asesoramiento genético y el seguimiento regular de las personas afectadas y sus familias. Buscamos concienciar a los profesionales de la salud sobre este diagnóstico diferencial, poco frecuente pero significativo, mediante un informe de caso detallado y una revisión exhaustiva de la literatura. Received: 22 January 2025.Accepted: 20 March 2025

A high-throughput regeneration protocol for recalcitrant tropical Indian maize (Zea mays L) inbreds

Immature embryos from five select recalcitrant maize (Zea mays L) inbreds used as explants were evaluated for their ability to form callus, somatic embryos and subsequent regeneration into plants. The embryos were placed on N6 basal media with varying levels of 2,4-D (0.5, 1.0, 1.5, 2.0, and 2.5 mg l-1) and were regenerated on MS me¬dium supplemented with BAP (2 - 10 mg l-1), 2,4-D (0.25 mg l-1) and silver nitrate (0.85 mg l-1). Explants cultured on N6 medium supplemented with 2,4-D (2.0 mg l-1) were associated with the highest frequency of embryogenic calli and that of UMI 29 were highly embryogenic (78.67%). When synergism between dicamba and 2,4-D on Type II callus production in UMI 29 was sought to be investigated using 2,4-D (1 or 2 mg l-1) individually and in combina¬tion with dicamba (3.7 mg l-1) production of Type II callus with the greatest frequency of 83.33% was observed on N6 medium containing 3.7 mg l-1 dicamba + 1 mg l-1 2,4-D. The greatest percentage of shoot induction (82.67%) was observed on MS medium supplemented with BAP (10 mg l-1). Among the five genotypes tested, UMI 29 was associated with the highest percentage of callus initiation, shoot induction and mean number of developed shoots. The protocol described in this study can reliably be used to transform tropical maize inbreds as a routine