39 research outputs found
Socio-cultural Sustainability through Study Material: English Language Teaching in India
No full textControl of Three Phase Grid Connected Photovoltaic System
No full textTo counter environmental pollution arising out of fossil fuel power generation,the world is gradually shifting towards renewable sources of energy, with solar energy leading at the front. In a grid-connected solar PV system, the energy generation system and utility grid are interfaced by using power electronics converters which are commonly based on a VSI (voltage source inverter) connected to the mains supply network, which is used to regulate power flow and ensuring operation with unity power factor. The grid requirements are improved power quality, Good transient response during fault conditions, grid synchronization and independent control of active & reactive power and etc.
To achieve this requirement of the grid, here we designed a 10kW PV system which is to be interfaced to a utility grid to be performed. This project represents athree-phase, single-stage grid integrated solar PV system. The proposed system serves for power factor correction,the maximum power point tracking (MPPT), the grid 5 currents balancing and harmonics mitigation of loads connected at the PCC (point5 of common coupling). The solar photovoltaic system uses a three- phase VSC (voltage source converter) to perform these functions. This system extracts the solar energy from the photovoltaic system and feeds to the grid.MPPT algorithm is put to use for extracting maximum power from Photovoltaic system. There are many types of MPPT algorithms are there, but especially which are widely used is perturb and observer and incremental conductance algorithm. Here, the proposed system used the incremental conductance which is more accurate and more efficient. The reference DC link voltage of voltage source converter is also decided by the MPPT algorithm.
In a simplified way, the control algorithm of a solar photovoltaic system consists of two parts, in the first part the MPPT decides the reference D.C. link voltage and secondly the VSC is controlled by the use of control functions. The PV system voltage is maintained at the reference which is controlled by a PI(proportional integral)controller using an MPPT algorithm. For controlling the VSC, an Improved linear sinusoidal tracer (ILST) and Damped-second order generalized integrator (Damped-SOGI) is proposed. The main characters of the Improved linear sinusoidal tracer control algorithm are fast convergence, control simplicity while the Damped-SOGI is having the higher converging state, good noise immunity response and improved steady-state performance. The fundamental component of the load current is extracted by using an ILST and a Damped-SOGI based control algorithm, zero crossing detectors and sample and hold log are used to extract the active power component of load currents. PI controller is used to estimate the loss component of VSC and reference grid currents are estimated by combining all these components. The sensed grid currents and the reference grid currents are compared and a current controller is used for producing the switching pulses for the grid VSC interfaced. The unity power factor (UPF),as well as the sinusoidal balancing of grid currents, are controlled by the VSC. The currents injected into the grid are synchronized using unit templates derived from PCC voltages. Only active power is exchanged through the grid because the grid currents are at UPF. The total active power in the system must be balanced among the grid, the loads and the SPV. There is a comparison between the Damped SOGI and ILST algorithm on the basis of THD and other waveforms. The simulation results are obtained by using MATLAB/Simulink for controlling the active current between the PV-grid systems
Problematyka zrównoważonego rozwoju społeczno-kulturowego w materiałach dydaktycznych: Nauczanie języka angielskiego w Indiach
No full textTeaching materials are the primary source of input in the language classroom. The potential of English language teaching (ELT) materials to preserves and transmit our culture, value, identity, and language make it significant for socio-cultural sustainability. The materials developed by the National Council of Education and Research Training (NCERT) are far and wide running study materials in primary and secondary schools in India. India exhibits a massive variety of cultures, customs, languages, and religious beliefs. The selection and development of apt materials is, therefore, a matter of serious deliberation. The centrally developed material, despite numerous benefits, often lacks in representing different groups of students, especially the backward and marginalized ones. The contents, in most cases, are representative of the mainstream. Therefore, the study suggests teachers developed supplementary materials to which learners from all the groups can relate. The researcher has taken the context of Jharkhand and illustrates self-developed supplementary materials prepared using contents from learners’ social and cultural backgrounds. The article offers various suggestions on how to develop such materials that could bring socio-cultural equity in the classroom, making a significant contribution to social sustainability.Materiały dydaktyczne są głównym źródłem informacji w klasie językowej. Potencjał materiałów do nauczania języka angielskiego (ELT) w ochronie i przekazywaniu naszej kultury, wartości, tożsamości i języka sprawia, że są one istotne z perspektywy zrównoważonego rozwoju społeczno-kulturowego. Materiały opracowane przez National Council of Education and Research Training (NCERT) są szeroko stosowanymi materiałami do nauki w szkołach podstawowych i średnich w Indiach. Indie wykazują ogromną różnorodność kultur, zwyczajów, języków i przekonań religijnych. Wybór i opracowanie odpowiednich materiałów jest zatem kwestią poważnej refleksji. W materiale opracowanym centralnie, mimo licznych korzyści, często brakuje reprezentacji różnych grup uczniów, zwłaszcza tych zacofanych i marginalizowanych. Treści w większości przypadków są reprezentatywne dla głównego nurtu. W związku warto zasugerować nauczycielom opracowanie materiałów uzupełniających, do których mogą odnieść się uczniowie ze wszystkich grup. W artykle przyjęto perspektywę Jharkhanda i przedstawiono własne materiały uzupełniające wykorzystujące treści pochodzące ze środowisk społecznych i kulturowych uczniów. Artykuł zawiera konretne sugestie dotyczące opracowywania takich materiałów, które mogłyby zapewnić równość społeczno-kulturową w klasie, wnosząc znaczący wkład w zrównoważony rozwój społeczny
Rola języka w zrównoważonym rozwoju: wielojęzyczność i umiejętność czytania i pisania w Indiach
No full textThe paper, out of the three major domains of sustainable development, brings its focus on socio-cultural sustainability. As human contacts and negotiation are essential to serve the purposes of sustainable development worldwide, language as a shared means of communication is worth paying attention to. The central objective of the paper is to deliberate on the significance of language and literacy in sustainable development. Firstly, it introduces the notion of sustainable development and conceptualizes language within its frame. Then, it explores the link between language, literacy and development; and elucidates the role this plays in attaining sustainable development goals. The paper further highlights the debate between English and mother tongue/local languages specific to the literacy programmes in India. Conflicts in language selection for the medium of instruction, deciding on the place of mother tongue and global language, etc are some obvious issues in the multilingual and multicultural education scenario. Therefore, the paper calls for the need of adopting a multilingual approach in order to address the linguistic diversity in the multilingual educational contexts. Both English and local languages have been equally emphasized for attaining social sustainability at the local and global plane. Some implications are also suggested to be utilized in language/educational programmes.Niniejszy artykuł, spośród trzech głównych filarów zrównoważonego rozwoju, koncentruje się na zrównoważeniu społeczno-kulturowym. Ponieważ kontakty międzyludzkie i negocjacje są niezbędne, by służyć zrównoważonemu rozwojowi na całym świecie, warto zwrócić uwagę na język jako wspólny środek komunikacji. Głównym celem artykułu jest rozważenie znaczenia języka i umiejętności czytania i pisania o zrównoważonym rozwoju. Po pierwsze, wprowadza pojęcie zrównoważonego rozwoju i konceptualizuje język w jego ramach. Następnie bada związek między językiem, umiejętnością czytania i rozwoju oraz wyjaśnia rolę, jaką odgrywa w osiąganiu celów zrównoważonego rozwoju. Artykuł dodatkowo omawia relację między językiem angielskim a językiem ojczystym / językami lokalnymi w kontekście programów alfabetyzacji w Indiach. Konflikty w wyborze języka jako środka nauczania, decydowania o miejscu języka ojczystego i języka globalnego itp. to pewne oczywiste problemy w scenariuszu edukacji wielojęzycznej i wielokulturowej. W związku z tym w artykule postuluje się przyjęcie podejścia wielojęzycznego w celu uwzględnienia różnorodności językowej wielojęzycznych klas. Podkreślono rolę zarówno języka angielskiego, jak i lokalnego, jako drogi do osiągnięcia równowagi społecznej na płaszczyźnie lokalnej i globalnej. Autorzy wskazują również, na niektóre rozwiązania, które można wykorzystać w programach językowych / edukacyjnych
Capturing Plant Genetic Potential of Upland Rice for Exploiting Arbuscular Mycorrhiza Responsiveness to Improve Rice Variety for Higher Phosphorus (P) Acquisition Under P Limiting Environments
No full textEFFECT OF ARBUSCULAR MYCORRHIZAL (AM) INOCULATION ON UPLAND RICE ROOT SYSTEM
No full textABSTRACT
This paper provides a brief assessment of the effect of AM (arbuscular mycorrhizal) inoculation on certain root morphological characters (root length, root diameter, root surface area, root volume, root length density) and branching pattern (fractal dimension) of upland rice (Oryza sativa L.) an important food grain crop. The uplands in India being rainfed is drought prone and crop productivity is severely crippled due to major constraint of inefficient phosphorus (P) acquisition. The effects of AM fungi (AMF) on enhancing rice plant growth, P uptake and yield are well-acknowledged. The present investigation will aid in generating information on influence of AMF association on rice root growth which would provide further clues for possible exploitation of AMF activities in favor of rice crop. For this, three upland varieties, Sathi 34-36 (highly AM-responsive), Jonga (AM non-responsive) and Vandana (moderately AM-responsive) were selected. AM-responsiveness of these three varieties was measured as a change in total dry matter production as a result of AM-symbiosis (on inoculation with AM fungi). P uptake at 40 DAE (days of emergence) under un-inoculated low P conditions for the three rice varieties was also evaluated with Sathi 34-36 having the highest tissue P content. Root morphological attributes like root length density, total root length, root diameter, root volume and root surface area were increased on AMF inoculation in both responsive (Sathi 34-36) and non-responsive (Jonga) variety with higher magnitude only in non-responsive variety (Jonga). Thus, AM-responsive variety (Sathi 34-36) having higher P-demand (due to increased P-uptake) was more dependent on mycorrhizal pathway for P acquisition than non-responsive (Jonga) variety. Between responsive varieties, Sathi 34-36 along with its inherent better P demand compared to Vandana was altered significantly in root morphology suggesting that varieties with high P uptake ability under low P conditions would be more responsive to AM inoculation and thus would be more likely to undergo root morphological changes
Integration of crop rotation and arbuscular mycorrhiza (AM) inoculum application for enhancing AM activity to improve phosphorus nutrition and yield of upland rice (Oryza sativa L.)
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Effect of Different Level of NPK Fertilizers, FYM and Vermicompost on Yield Attributes of Okra (Abelmoschus esculentus L.) var. Devika
No full textThe field experiment was carried out at soil science research farm of Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj during kharif season 2022. The soil experimental area was sandy loam in texture. The design was laid out in randomized block design with three levels of NPK (0%,50%, & 100%), three levels of FYM and three levels of Vermicompost (0%, 50%, & 100%) respectively. The results obtained with treatment T9-[120:60:50 Kg NPK + 25 t FYM + 6 t Vermicompost] showed highest plant height, number of branches plant-1, number of leaves plants-1, number of fruits plant-1, total fruit yield. No significant was observed in yield and growth of okra under control. Application of Organic manures well as its mixture with full NPK considerably increase in growth and total yield attributes of okra. In contrast to all other treatments, use of 100% NPK, 100% FYM and 100% Vermicompost shows the most significant impact with effective on okra growth
Influence of Sagarika-Liquid with Inorganic Fertilizers for Enchaning the Soil Health and Yield of Green Gram (Vigna radiata L.)
No full textAn experiment was conducted on sagarika-liquid with inorganic fertilizers during Zaid season 2022 at the central research farm of Department of Soil science and Agricultural chemistry, to enhance the productivity. The design applied was 3x3 RBD having three levels of Sagarika-liquid @2ml, 3ml and 4ml L-1 and N P K @ 50, 75and 100%. The result obtained with treatment T9[N P K @100%+ 2 Spray of Sagarika 4ml l-1] that showed vermicompost in combination resulted in a slight change in soil pH at 0-15 cm and 15-30 cm were found 7.12 and 7.27and EC 0.35 and 0.32 dS m-1 respectively. The significant results were in pore space 47.90 and 45.52%, water holding capacity 46.10 and 43.60%, organic carbon 0.54%, 0.44%, and available nitrogen, phosphorus and potassium was found to be significant among other treatments in Green gram cultivation and soil quality improvement. The maximum yield regarding, gave the best results with respect to plant height 45.34 cm, number of pod plant-1 28.16, and number of seed pod-1 8.45. It gave highest yield 1.96 t ha-1. It was also revealed that the application with organic manures was excellent source for fertilization than fertilizers
