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This paper provides some of the conceptual and methodological underpinnings being developed in the ongoing TAPESTRY project which is part of the Transformations to Sustainability (T2S) Programme. We debate how the notion of transformation may be conceptualized from ‘below’ in marginal environments that are especially marked by high levels of climate-related uncertainties. We propose the notion of transformation as praxis — where the focus is on bottom-up change, identities, wellbeing and the recovery of agency by marginalized people and explore how ‘patches’ and the ‘marginal’ offer critical conceptual templates to examine whether and how systemic transformative changes are being assembled and effected on the ground by hybrid and transformative alliances. The article concludes by discussing potential challenges of such engagements, alongside pursuing a normative and political approach to T2S.

This paper provides some of the conceptual and methodological underpinnings being developed in the ongoing TAPESTRY project which is part of the Transformations to Sustainability (T2S) Programme. We debate how the notion of transformation may be conceptualized from ‘below’ in marginal environments that are especially marked by high levels of climate-related uncertainties. We propose the notion of transformation as praxis — where the focus is on bottom-up change, identities, wellbeing and the recovery of agency by marginalized people and explore how ‘patches’ and the ‘marginal’ offer critical conceptual templates to examine whether and how systemic transformative changes are being assembled and effected on the ground by hybrid and transformative alliances. The article concludes by discussing potential challenges of such engagements, alongside pursuing a normative and political approach to T2S.

The generic problem considered is the propagation of vortical waves across junctions between one wave-bearing medium and another. It is assumed that the eigensolutions are known for the corresponding spatially homogeneous problems. The task is how to determine the amplitudes of the reflected and transmitted waves given the amplitude of the incident wave. In general, there may be more than one incident, reflected or transmitted wave. It is shown how this sort of problem may be solved in terms of the homogeneous eigensolutions by drawing an analogy between the junction and a wave-driver. The particular illustrative problem studied is that of a Tollmien-Schlichting wave, propagating along a rigid-walled channel flow, that is incident on a section of the channel where the walls consist of compliant panels. It is shown how the wave system over the compliant panels and the amplitude of the Tollmien-Schlichting wave leaving the compliant section may be determined in terms of the incident wave. The technique developed for this problem is considered to be generic.

The generic problem considered is the propagation of vortical waves across junctions between one wave-bearing medium and another. It is assumed that the eigensolutions are known for the corresponding spatially homogeneous problems. The task is how to determine the amplitudes of the reflected and transmitted waves given the amplitude of the incident wave. In general, there may be more than one incident, reflected or transmitted wave. It is shown how this sort of problem may be solved in terms of the homogeneous eigensolutions by drawing an analogy between the junction and a wave-driver. The particular illustrative problem studied is that of a Tollmien-Schlichting wave, propagating along a rigid-walled channel flow, that is incident on a section of the channel where the walls consist of compliant panels. It is shown how the wave system over the compliant panels and the amplitude of the Tollmien-Schlichting wave leaving the compliant section may be determined in terms of the incident wave. The technique developed for this problem is considered to be generic.

Abstract Simultaneous activation of CO 2 and H 2 O was carried out in a non thermal plasma dielectric barrier discharge reactor operated under ambient conditions. The plasma reactor packed with partially reduced NiO/Al 2 O 3 catalyst showed better CO 2 conversion than both the unreduced NiO/Al 2 O 3 and with plasma (no catalyst), whereas, highest syngas selectivity was observed with unreduced NiO/Al 2 O 3 . An interesting observation is the formation of carbon nanofibres (CNFs) along with syngas with a reduced NiO catalyst integrated to the plasma, whereas, pure NiO only led to the formation of methane. The reduction of CO 2 by in situ formation of hydrogen from water splitting may produce CH 4 and plasma-assisted chemical vapour decomposition of CH 4 may lead to the formation of CNFs.

Abstract Simultaneous activation of CO 2 and H 2 O was carried out in a non thermal plasma dielectric barrier discharge reactor operated under ambient conditions. The plasma reactor packed with partially reduced NiO/Al 2 O 3 catalyst showed better CO 2 conversion than both the unreduced NiO/Al 2 O 3 and with plasma (no catalyst), whereas, highest syngas selectivity was observed with unreduced NiO/Al 2 O 3 . An interesting observation is the formation of carbon nanofibres (CNFs) along with syngas with a reduced NiO catalyst integrated to the plasma, whereas, pure NiO only led to the formation of methane. The reduction of CO 2 by in situ formation of hydrogen from water splitting may produce CH 4 and plasma-assisted chemical vapour decomposition of CH 4 may lead to the formation of CNFs.

Power system software used for analysis and dynamic simulation and relay settings require accurate model parameters of different elements for precise results. For this, transmission line parameter verification is necessary at times, which changes due to atmospheric condition and aging. This paper presents a method for estimating the parameters of series compensated line online using synchronized time-domain data captured by the intelligent electronic devices at both ends of the line, which is free of the compensation model. The method uses traveling waves generated during disturbance to obtain the propagation constant of the line, which is used to estimate the resistance and the characteristic impedance of the line. Subsequently, the inductance and capacitance of the line are calculated. The proposed method is tested using PSCAD/EMTDC simulation data of an actual series compensated line in Indian power grid. Results demonstrate the accuracy of the proposed method.

Power system software used for analysis and dynamic simulation and relay settings require accurate model parameters of different elements for precise results. For this, transmission line parameter verification is necessary at times, which changes due to atmospheric condition and aging. This paper presents a method for estimating the parameters of series compensated line online using synchronized time-domain data captured by the intelligent electronic devices at both ends of the line, which is free of the compensation model. The method uses traveling waves generated during disturbance to obtain the propagation constant of the line, which is used to estimate the resistance and the characteristic impedance of the line. Subsequently, the inductance and capacitance of the line are calculated. The proposed method is tested using PSCAD/EMTDC simulation data of an actual series compensated line in Indian power grid. Results demonstrate the accuracy of the proposed method.