17 research outputs found

    Dynamic Active Thermal Control of a LEO Nanosatellite Based on its Mode of Operation

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    The paper explains the design of an active thermal control system which would work as per the needs of the current operational mode of the satellite. The modes of the satellite have been classified into two major groups: the normal modes and the emergency modes. The modes of interest to the thermal control system are three of the emergency modes and the image capture mode, which is one of the normal modes. The electrical loop of the system will be dynamically controlled by the TI MSP430 microcontroller of the Electrical Power System (EPS) as per the present mode of operation set by the On-Board Computer (OBC). The dynamic control loop ensures that the imager is heated to its optimal working range from its storage range during the image capture mode. A separate dynamic control loop is also used to maintain the optimal temperature for the satellite’s batteries as per the mode of operation. Redundancy has been established using a mechanical thermostat-based control loop in addition to the already planned dynamic control loop. This ensures the protection from thermal failure of the components during the emergency modes

    The Legal Dilemma for Environmental Democracy: Application of Blue Engineering

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    Compliance through deterrence is the major criteria for the implementation of environmental laws. The study conducted by Jerry and Amy, (2023), showed that this compliance through deterrence was implemented only to not allow the violator to have an economic advantage over the non-violator. The data obtained in the study, indicated that fundamental problems existed in the calculations of these deterrence methods which were by and large monetary penalties and in the worst-case scenario, incarceration. This study, challenges this system of litigating and decision making on environmental violations by the application of Blue Engineering through its tool the TINS-D Constellation. Monsanto’s recent environmental lawsuit was considered, which was ruled for a 700 million USD settlement penalty for the pollution of the Oregon’s waterways due to the discharge of polychlorinated biphenyls. With the current environmental laws structured to levy monetary penalties on the violator, this lawsuit was subjected to a group of Blue Engineering students, to see if a different ruling could be achieved. On successfully conducting the research, it was seen that a new ruling which attained which resulted in a cleanup by Monsanto under the supervision of a third party which had unanimously received a 75% acceptance. With this being in accordance with the hypothesis the research question was answered. It could be concluded that the application of Blue Engineering and its tool reduced the reliance of Environmental Laws on monetary penalties thereby increasing the potential of establishing environmental laws to solving the environmental problems democratically.Additional ThesisCivil Engineerin

    Trauma, Diasporic Consciousness, and Ethics in Nicole Krauss’s Forest Dark

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    Dislocation, expatriation, and the attendant loss of homeland are concerns at the heart of Jewish literature. The dialectical relationship between identity and the sense of homeland informing the Jewish diasporic consciousness, in particular, has often culminated in nostalgic depictions of Israel in post-war American Jewish literature. In focusing on such a literary representation, this essay unravels the multidimensionality of diasporic Jewish identity. Critically analyzing Nicole Krauss’s Forest Dark (2017), it evaluates the trauma of exile and the psychic dilemma of third-generation American Jewish writers. The novelist brings about a confluence of nostos and nostalgia in Forest Dark. In evoking the visceral sense of loss, dislocation, and a painful yearning for the lost homeland, the author succeeds in tracing the lives of two protagonists, Jules Epstein, a retired New York lawyer, and Nicole, a Jewish American novelist struggling with a deep marital crisis. The text foregrounds the theme of self-discovery exemplified in the homecoming of its two central characters. Following his parents’ death and haunted by the anguish and horror of the Shoah, Jules unmoors himself from his current life and flies to Tel Aviv on a whim. Nicole, who suffers from creative blockage on account of her failing marriage, undertakes the trip to Tel Aviv hoping to recover from her soul-sickness, as it were. If Jules and Nicole do not cross paths, it still remains that their Jewish identities stem from the originary tragedy of the Holocaust. Although removed from the horrific sights and scenes of the tragic event, intergenerational trauma resonates with certain aspects of the diasporic Jewish existence. Using theoretical interventions of memory studies and the Freudian concept of Unheimlich or the uncanny, this essay explores the ethical implications that undergird Nicole Krauss’s diasporic depiction of Israel

    Teacher professional learning communities: A collaborative OER adoption approach in Karnataka, India (Advance online publication)

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    This chapter analyses collaborative Open Educational Resources (OER) adoption amongst Indian school teachers by examining the enabling and constraining techno-social, techno-pedagogical and sociocultural factors in an education context characterised by (1) low information and communication technologies (ICT) use in schools; (2) a “textbook culture” in which teachers often act as simply “content transmitters” of officially prescribed texts; and (3) diverse linguistic challenges, in which predominately English language OER may not always be relevant. The study addressed the following research question: Can a collaborative, “bottom-up” approach by teachers working together to create, adapt and share contextually appropriate resources provide a model of OER adoption? This study adopted a mixed-methods approach – primarily through action research – in which the research team collaborated with 67 teachers and teacher educators on an OER adoption process. The team worked with the teachers between June 2013 and December 2015, utilising a combination of face-to-face workshops (19 in total), questionnaires, focus group discussions and online interactions. The participants were selected from different districts of Karnataka state, representing diverse geographic areas of the state and three subject disciplines: mathematics (26), science (18) and social science (23). The impact this collaboration had on teacher practices was compared with a Comparable group made up of 124 teachers who did not participate in the research intervention. Data analysis suggests that teachers are able to use digital methods to adopt OER and to contextualise (revise) OER to suit their needs, if given appropriate training. Their techno-social skills were advanced through greater knowledge and experience with digitally mediated collaborative OER activity. Their techno-pedagogical efficacy improved through greater networking with other colleagues and a sense of openness to having their materials adapted and revised, though teachers acknowledged that linguistic and quality challenges remained. The collaborative OER adoption approach also raised teachers’ sociocultural knowledge concerning copyright and contextually relevant OER. In addition, the OER engagement processes have aided teacher professional development by building a collaborative environment with peers and introducing them to a multiplicity of educational resources. The authors recommend that state education authorities implement a professional learning community approach to teacher professional development within in-service teacher education, implement a collaborative model for OER adoption, suggest that copyright regulations should position open licensing as the default, and implement a Free Open Source Software-based ICT programme in school education.Citation: Kasinathan, G. & Ranganathan, S. (2017). Teacher professional learning communities: A collaborative OER adoption approach in Karnataka, India. In C. Hodgkinson-Williams & P. B. Arinto (Eds.), Adoption and impact of OER in the Global South. Chapter 14 advance publication. Retrieved from http://dx.doi.org/10.5281/zenodo.160680 Corresponding author

    Functional characterization of a reproductive tissue specific promoter from Eucalyptus camaldulensis

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    SWEET proteins are essential for the maintenance of nectar production, seed and pollen development in plants. Sequence similarity search in Eucalyptus genome resulted in 52 putative genes from SWEET gene family. Expression of two selected SWEET family genes namely EcSWEET2 and EcSWEET5 were analyzed in vegetative and reproductive tissues of Eucalyptus camaldulensis. Expression of EcSWEET5 was specific to male reproductive tissues and transcripts were detected only at certain stages of flower development. Tobacco Rattle Virus-mediated suppression of EcSWEET5 resulted in significant reduction in pollen germination percentage in Nicotiana benthamiana with no adverse effect on vegetative growth. Promoter sequence of one kb upstream to start codon of EcSWEET5 contained many elements suggestive of pollen specificity of the promoter. Pollen specificity of EcSWEET5 promoter was confirmed in transgenic tobacco lines harboring GUS gene with EcSWEET5 promoter. GUS expression was limited to pollen alone in transgenic tobacco as evidenced by histochemical staining. Expression of cytotoxic gene, barnase under EcSWEET5 promoter showed pollen ablation in transgenic tobacco with normal vegetative growth.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author

    Social impact assessment process for an efficient socio-economic transformation towards poverty alleviation and sustainable development

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    &#x0D; &#x0D; &#x0D; Abstract&#x0D; Sustainable social entrepreneurship (SSE) is a kind of entrepreneurship that meets the needs of the present without compromising the ability, efficiency and values of future generations to meet their own needs. SSE leads to sustainable development. Social entrepreneurs were developed through well-conceived and well directed training programmes around thrust areas, thus advancing the frontiers of theories and practice SSE. The concept of SSE challenges that fosters long-term protection of the society, environment and its habitants as the technological or engineering developments are guided by efficiency, productivity, profitability, health and environmental impacts, resource and energy conservation, waste management, and social impacts such as public convenience, unemployment and crime. The specific objectives of this research were: (i) To formulate and appraise forty-three number of detailed project reports (DPRs) of Diploma in Entrepreneurship and Business Management (DEBM ) course extension learners in eleven batches attached with the DEBM Counsellor and Co- ordinator of Entrepreneurship Development Institute of India -Ahmedabad (EDI),India as well author of this research during the research year (RY) 2007-2014 , (ii) To conduct social impact assessment and environmental health impact assessment (EHIA) for projects , (iii) To design and develop a comprehensive and green economic system modelling and (iv) To promote sustainable socio- economic policies of SIA process for an efficient socio- economic transformation development based on social entrepreneurial research conducted in South India . The design of the study is cross sectional. SIA is defined as the systematic identification and evaluation of the potential social impacts of proposed projects, plans, programs, policies or legislative actions relative to the socio- economic components of the society and total environment. Social factor has been considered in project planning and decision-making process in order to arrive at action which should be socio-economically compatible. Environmental health impact assessment process has been conducted in order to mitigate the environmental health impacts. Socio-economic environment is a man-made environment related to a set of considerations such as demographical study including population trends and population distribution , population interaction and interrelation to the social problem and solution, economic indicators of human welfare services, educational systems, transportation systems, environmental protective infrastructural facilities such as water supply system, waste water treatment system, solid and hazardous waste management, resource conservation and recovery process, environmental public health services and medical facilities. Social impact assessment process should be enacted as social policy act in order to encourage the considerations of human society in project planning and decision making process . Extension learners were equipped with the knowledge, skills and motivation to set up their sustainable social enterprises and function dynamically and manage successfully. DPRs proposed by learners have been investigated as per guidelines provided by EDI. Entrepreneurial business planning assessment regimes (EBPARs) have been accomplished for their credibility and communicability. DEBM projects were screened for the seven fatal flaws viz., (i) Scientific feasibility, (ii) technical feasibility, (iii) economic feasibility, (iv) marketing feasibility, (v) environmental feasibility, (vi) social feasibility and (vii) fundamental legality. Social entrepreneur of an entrepreneurial team should need skills in ethics, accounting, law, finance, team creation and marketing aspects in order to avoid failures in the process. The result analysis of forty- three learners has been discussed. Based on comprehensive socio-economic analysis, a green socio-economic system model has been presented. A famous project case of a DPR-I has been presented on unsafe chromium pollution and contamination of about 18 000 to 30 000 mg/kg from Indian cotton roller ginneries and development of green design roller gin rollers for cotton gins duly investigated in a ginning factory. Such low-carbon and energy-efficient agricultural technologies of agricultural hi-tech industries have made important contributions to mitigating the impacts of economic growth on global warming. Hitherto state-of-the- art literatures, market effects have been considered. It is reported that non-market impacts such as social and environmental impact assessment should be considered for proposed projects, plans, programs, policies and legislative action. It is concluded that this action-based and extension learning field study on SSE shall promote sustainable socio-economic policies for sustainable development and poverty alleviation.&#x0D; &#x0D; &#x0D; &#x0D; Keywords: action, efficient, entrepreneurship, environmental impact assessment process, project, social impact assessment (SIA) process, transformation.&#x0D; &#x0D; &#x0D; &#x0D; &#x0D; &#x0D; </jats:p

    The impact of peening on residual stress in wire-arc additive manufactured Ti-6Al-4V using contour method and phased array ultrasonics

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    Additive Manufacturing (AM) is increasingly used to produce complex components, with Wire Arc Additive Manufacturing (WAAM) playing a crucial role in industries such as aerospace, particularly for titanium alloys like Ti-6Al-4V. However, WAAM introduces significant Residual Stress (RS) due to the high heat input, which can lead to component failure. Therefore, understanding how to evaluate RS in Ti-6Al-4V WAAM-manufactured components and minimizing its effects is essential. Peening can mitigate tensile RS by introducing compressive stress, making it important to assess its impact on WAAM samples. In this study, RS measurements were conducted using both the newly developed Phased Array Ultrasonics for Residual Stress Measurement (PAURS) and the well-established Contour Method. While various RS measurement techniques exist, there is a gap in understanding how PAURS can be effectively applied. To address this, The Contour Method was used to validate PAURS results on WAAM Ti-6Al-4V samples. RS was evaluated in both peened and unpeened samples, enabling a comparative analysis. Results showed that (I) PAURS and The Contour Method exhibited good qualitative agreement in as-built samples, and (II) peening effectively introduced up to 800 MPa compressive stress on the top surface of WAAM components
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