Perumpanatrupadai's Traditional Residence and Food Habits

The Perumpanatrupadai with the special name Panaru was sung by Kadiyalur Uruthirankannan to praise the Perumpanan who was about to receive the prize by Panan to appease the Thondaiman Ilanthirayan. Not only the news about the bravery and gift of Thondaiman Ilanthirayan, but also the lifestyle of the Panars, the lives and work of Einar, Kovalar, Uzhawar, Valaignar, Anthanar, etc., news about the construction of their residences, food preparation, hospitality, agriculture, barter, etc., have been recorded. This article is designed to analyse the news about housing and food

Acute right ventricular dysfunction in a critically ill patient with COVID-19

• Right ventricular dysfunction is common in critically ill patients with COVID-19. • Echocardiography is crucial for diagnosing hemodynamic complications of COVID-19. • Pulmonary embolism and acute cor pulmonale can complicate SARS-CoV-2 infection

LAND USE/LAND COVER CHANGES IN SEMI-ARID MOUNTAIN LANDSCAPE IN SOUTHERN INDIA: A GEOINFORMATICS BASED MARKOV CHAIN APPROACH

Nowadays land use/ land cover in mountain landscape is in critical condition; it leads to high risky and uncertain environments. These areas are facing multiple stresses including degradation of land resources; vagaries of climate and depletion of water resources continuously affect land use practices and livelihoods. To understand the Land use/Land cover (Lu/Lc) changes in a semi-arid mountain landscape, Kallar watershed of Bhavani basin, in southern India has been chosen. Most of the hilly part in the study area covers with forest, plantation, orchards and vegetables and which are highly affected by severe soil erosion, landslide, frequent rainfall failures and associated drought. The foothill regions are mainly utilized for agriculture practices; due to water scarcity and meagre income, the productive agriculture lands are converted into settlement plots and wasteland. Hence, land use/land cover change deduction; a stochastic processed based method is indispensable for future prediction. For identification of land use/land cover, and vegetation changes, Landsat TM, ETM (1995, 2005) and IRS P6- LISS IV (2015) images were used. Through CAMarkov chain analysis, Lu/Lc changes in past three decades (1995, 2005, and 2015) were identified and projected for (2020 and 2025); Normalized Difference Vegetation Index (NDVI) were used to find the vegetation changes. The result shows that, maximum changes occur in the plantation and slight changes found in forest cover in the hilly terrain. In foothill areas, agriculture lands were decreased while wastelands and settlement plots were increased. The outcome of the results helps to farmer and policy makers to draw optimal lands use planning and better management strategies for sustainable development of natural resources

Birefringence induced by antiferroelectric switching in transparent polycrystalline PbZr0.95Ti0.05O3PbZr_{0.95}Ti_{0.05}O_{3} film

The most characteristic functional property of antiferroelectric materials is the possibility to induce a phase transition from a non-polar to a polar phase by an electric field. Here, we investigate the effect of this field-induced phase transition on the birefringence change of $PbZr_{0.95}Ti_{0.05}O_{3}$. We use a transparent polycrystalline $PbZr_{0.95}Ti_{0.05}O_{3}$ film grown on $PbTiO_{3}/HfO_{2}/SiO_{2}$ with interdigitated electrodes to directly investigate changes in birefringence in a simple transmission geometry. In spite of the polycrystalline nature of the film and its moderate thickness, the field-induced transition produces a sizeable effect observable under a polarized microscope. The film in its polar phase is found to behave like a homogeneous birefringent medium. The time evolution of this field-induced birefringence provides information about irreversibilities in the antiferroelectric switching process and its slow dynamics. The change in birefringence has two main contributions, one that responds briskly (~ 0.5 s), and a slower one that rises and saturates over a period of as long as 30 minutes. Possible origins for this long saturation and relaxation times are discussed.Comment: 15 pages, 5 figure

Strain engineering of the electro-optic effect in polycrystalline BiFeO3 films [Invited]

peer reviewedElectro-optic thin film materials, which change their refractive index upon the application of an electric field, are crucial for the fabrication of optical modulators in integrated photonic circuits. Therefore, it is key to develop strategies to tune the linear electro-optic effect. Strain engineering has arisen as a powerful tool to optimize the electro-optic coefficients in ferroelectric thin films. In this report, the electro-optical properties of polycrystalline bismuth ferrite (BiFeO3) thin films are studied. The electro-optic coefficients (reff) of low-cost solution-processed BiFeO3 films under different substrate-induced thermal stress are characterized using a modified Teng-Man technique in transmission geometry. The influence of poling state and substrate stress on the electro-optical properties are discussed. The films show a notable piezo-electro-optic effect: the effective electro-optic coefficient increases both under compressive and tensile in-plane stress, with compressive stress having a much more profound impact. Electro-optic coefficients of 2.2 pm/V are obtained in films under a biaxial compressive stress of 0.54 GPa

An alternative pathway to plant cold tolerance in the absence of vacuolar invertase activity

To cope with cold stress, plants have developed antioxidation strategies combined with osmoprotection by sugars. In potato (Solanum tuberosum) tubers, which are swollen stems, exposure to cold stress induces starch degradation and sucrose synthesis. Vacuolar acid invertase (VInv) activity is a significant part of the cold-induced sweetening (CIS) response, by rapidly cleaving sucrose into hexoses and increasing osmoprotection. To discover alternative plant tissue pathways for coping with cold stress, we produced VInv-knockout lines in two cultivars. Genome editing of VInv in 'Desiree' and 'Brooke' was done using stable and transient expression of CRISPR/Cas9 components, respectively. After storage at 4 degrees C, sugar analysis indicated that the knockout lines showed low levels of CIS and maintained low acid invertase activity in storage. Surprisingly, the tuber parenchyma of vinv lines exhibited significantly reduced lipid peroxidation and reduced H2O2 levels. Furthermore, whole plants of vinv lines exposed to cold stress without irrigation showed normal vigor, in contrast to WT plants, which wilted. Transcriptome analysis of vinv lines revealed upregulation of an osmoprotectant pathway and ethylene-related genes during cold temperature exposure. Accordingly, higher expression of antioxidant-related genes was detected after exposure to short and long cold storage. Sugar measurements showed an elevation of an alternative pathway in the absence of VInv activity, raising the raffinose pathway with increasing levels of myo-inositol content as a cold tolerance response

A review of the short story collection of Neelamalai

Review of the collection of short stories 'Neelamalai' written by Malayalam writer Urubu One of the notable writers in the world of Malayalam literature, PC Kuttikrishnan, also known as uhd Urubu, wrote a collection of short stories called 'Neelamalai' by. Kuttikrishna Menon is the whole point of Asha php. ‘Urubu’ is his nickname. Eva was born on June 8, 1915 in Ponnani, Kozhikode district. Evangel, Short Story, Drama, Poetry, as has given reassurance to all departments. MP Milk Award. Government of Kerala Award for Best Screenplay. Sahitya Akademi Award. The teacher sometimes lived in the Nilgiris and Wayanad hills, Short story Ava has said. There are a total of 6 short stories in this collection. The titles are set in relation to the central theme of the story. As the stories are centered on the Nilgiris and Wayanad, the technique of setting the beginning of the story with descriptions of places is used in all the stories. The characters in these stories are mostly hill people. Mountain races like Thotawa, Vaduga are shown. On a small scale vulgaris, gpw are shown as human beings. The hill tribesmen who come in male roles are hard workers. He has a hard working body and an owl mind that does not know the outside world. The women who come as female characters are innocent who do not know the outside world. So that he is deceived by others and, cannot break the rules. The characters, who are vulgar and, civilized, plunder the labor and life of the hill people. Pure Malayalam language is used in the stories. The vernacular is also used in the conversation of the hill tribes. vadugha language. Since the stories become the author's experience, it seems to be the best strategy to have the stories set by the teacher. The story is set in the Nilgiris, Wayanad hills, their biographical background, language, culture, customs, etc. The technique used in the stories is good. Having the meaning of the words in their own language helps the reader to understand the story

Astronomical News in kurunthogai

Science was born as the word knowledge. A society can think of distant air, planets, moon, Sun, etc., only after learning about the nature and kinetic elements of the objects around it. Among the most important of the Tamil literatures, the first of the Sangam literatures to be considered by the intellectual masses is the kurunthogai. Although the subject matter literature, the small amount, is based on the microstructures, the messages naturally referred to explain the subject matter are scientifically oriented. The purpose of this article is to take a closer look at the astronomical messages being studied in kurunthogai

FATIGUE AND BREAKDOWN STUDIES OF SOLUTION DEPOSITED OXIDE FERROELECTRIC THIN FILMS

Ferroelectric materials are ubiquitous in several applications and offer advantages for microelectromechanical systems (MEMS) in their thin film form. However, novel applications require ferroelectric films to be deposited on various substrates, which requires effective integration and know-how of the material response when selecting a substrate for film deposition. As substrate-induced stress can alter the ferroelectric properties of the films, the knowledge of how stress changes the ferroelectric response under different actuation conditions is essential. Furthermore, the stress-dependent behavior raises the question of understanding the reliability and degradation mechanisms under cyclic electric loading. Therefore, the ferroelectric thin film’s fatigue and breakdown characteristics become more relevant. Lead zirconate titanate (PZT) thin films are popular among other ferroelectric materials. However, there is a tremendous effort made in the direction of finding a lead-free alternative to PZT. Ferroelectric thin films can be deposited using different processing techniques. In this work, the chemical solution deposition route is adapted for depositing PZT thin films on transparent and non-transparent substrates. A correlation between the substrate-induced ferroelectric properties and processing conditions with different electrode configurations is established. Finite element modeling is used to understand the influence of the design parameters of the co-planar interdigitated electrodes for fabricating fully transparent PZT stacks. In-plane and out-of-plane ferroelectric properties of PZT thin films in metal-insulator-metal (MIM) and interdigitated electrode (IDE) geometries, respectively, on different substrates, are compared to establish the connection between the stress-induced effect and the actuation mode. It is shown that the out-of-plane polarization is high under in-plane compressive stress but reduced by nearly four times by in-plane tensile stress. In contrast, the in-plane polarization shows an unexpectedly weak stress dependence. The fatigue behavior of differently stressed PZT thin films with IDE structures is reported for the first time in this study. The results are compared to the fatigue behavior of the same films in MIM geometry. PZT films in MIM geometry, irrespective of the stress state, show a notable decrease in switchable polarization during fatigue cycling. In contrast, the films actuated with IDEs have much better fatigue resistance. The primary fatigue mechanism is identified as domain wall pinning by charged defects. The observed differences in fatigue behavior between MIM and IDE geometries are linked to the orientation of the electric field with respect to the columnar grain structure of the films. Hafnium oxide, an emerging and widely researched lead-free alternative to PZT for non-volatile ferroelectric memory application, is also explored in this work. The breakdown properties of chemical solution-deposited ferroelectric hafnium oxide thin films are also studied. The structure-property relationship for stabilizing the ferroelectric phase in solution-deposited hafnium oxide thin films is established. Furthermore, the effect of processing conditions on the ferroelectric switching behavior and breakdown characteristics are demonstrated and correlated with the possible mechanism