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The demand for effective cooling and energy storage technologies is growing continuously. The climatic changes, miniaturization, and digitalization have redefined the technological development in the cooling and energy storage industries. The global focus is on the environmental-friendly, efficient, sustainable, and scalable cooling technologies. Owing to all these factors, green alternatives to the traditional air-conditioning and refrigeration are gaining momentum. One of such green alternatives is the electrocaloric effect (ECE). The electrocaloric effect is observed in dielectric materials as they undergo an adiabatic temperature change or an isothermal entropy change under an externally applied/removed electric field. Dielectric materials are capable to store the electrical energy as well. Therefore, they are particularly interesting for the new cooling and energy storage technologies. In this work, a ferroelectric relaxor polymer, namely, Poly(vinylidene fluoride – trifluoroethylene – chlorofluoroethylene) (P(VDF–TrFE–CFE) is investigated for the electrocaloric effect through the direct and the indirect methods. The electrical energy storage properties of different compositions of P(VDF–TrFE–CFE) and their nanocomposites with inorganic 0D nanofillers are studied. Initially, the relaxor properties in six different compositions of P(VDF–TrFE–CFE) are studied. Out of these six compositions, the three compositions, 51.3/48.7/6.2, 59.8/40.2/7.3, and 70/30/8.1, are analyzed for the first time. The field induced phase transition results in a double hysteresis loop in a few compositions. Through the direct electrocaloric measurements, it is observed that the electric field induced phase transition results in a higher electrocaloric temperature change. The indirect electrocaloric measurements are conducted with and without compensating the leakage current. It is shown that the indirect method can lead to erroneous results due to the leakage current. The results obtained through the indirect measurements conducted with the leakage current compensation are comparable to the direct measurements. The electrical energy storage properties of the neat terpolymers and their nanocomposites are compared. It is observed that the stored and discharged energy densities of the nanocomposites are superior to the neat terpolymers. Dissertation, Universität Duisburg-Essen, 2022

With the increase in energy of the Large Hadron Collider to a centre-of-mass energy of 13 TeV for Run 2, events with dense environments, such as in the cores of high-energy jets, became a focus for new physics searches as well as measurements of the Standard Model. These environments are characterized by charged-particle separations of the order of the tracking detectors sensor granularity. Basic track quantities are compared between 3.2 fb$^{-1}$ of data collected by the ATLAS experiment and simulation of proton-proton collisions producing high-transverse-momentum jets at a centre-of-mass energy of 13 TeV. The impact of charged-particle separations and multiplicities on the track reconstruction performance is discussed. The efficiency in the cores of jets with transverse momenta between 200 GeV and 1600 GeV is quantified using a novel, data-driven, method. The method uses the energy loss, dE/dx, to identify pixel clusters originating from two charged particles. Of the charged particles creating these clusters, the measured fraction that fail to be reconstructed is $0.061 \pm 0.006 \textrm{(stat.)} \pm 0.014 \textrm{(syst.)}$ and $0.093 \pm 0.017 \textrm{(stat.)}\pm 0.021 \textrm{(syst.)}$ for jet transverse momenta of 200-400 GeV and 1400-1600 GeV, respectively. The European physical journal / C 77(10), 673 (2017). doi:10.1140/epjc/s10052-017-5225-7 Published by Springer, Berlin

This paper is a teaching case study written for educational purposes. The case brings forward a real-life situation of an organization that is engaged in the exciting but also risky journey of implementing a green innovation at a large scale. The case is written in a way that allows students to reflect and think about the organizational and leadership challenges and opportunities involved. The teacher can activate these reflections in the context of various possible theoreyical and analytical frameworks, in a number of possible different courses. The case is about Exergi, the main utility company producing district heating in Stockholm. After successfully transitioning from coal to bio-energy sources, since 2020 Exergi has embarked on a new and far more ambitious venture: Bioenergy Carbon Capture and Storage (BECCS). This technology captures CO2 emissions from biomass combustion and stores them, potentially resulting in negative emissions. BECCS plays a central role in IPCC mitigation pathways and Exergi has recognized an opportunity, but venturing into this uncharted territory presents numerous challenges. BECCS is a new and untested technology at an industrial scale, requiring substantial investments, and a market for selling carbon removal certificates (CRC) that does not exist yet. Though promising for reaching net zero targets in time, the viability of BECCS for Exergi depends on a supportive regulatory framework, cross-border cooperation, and the creation of a CRC market. To navigate these challenges, Exergi relies on creating an innovative organizational culture as well as mobilizing external stakeholders. Hence, CEO Anders Egelrudhas hired individuals with entrepreneurial mindsets, and sought external expertise as well as creating strong networks and communication approach. Yet, some internal tensions have also come to the fore, due to the rapid internal dynamics. Overall, Exergi's transition from coal to BECCS reflects the commitment to sustainable practices by an incumbent, and its willingnessto size new opportunities. The company's success driving this transformation forward hinges on many events coming together, both external and internal to the firm.

The role of sustainability practices around the world in supply chain made it a very critical point to measure not only the entities’ performance but also the sustainability practices in supply chain overall. This study takes Logistics Service Providers (LSPs) as the field of study in Egypt. The main aim of this study is to propose a new Sustainable Logistics Service Quality (SLSQ) framework through reviewing Sustainable Service Quality (SSQ), Egyptian laws related to Sustainability and Logistics Service Quality (LSQ) for enhancing Customer Satisfaction (CS) and Relationship Quality (RQ) in Egypt. This research starts with the literature review to derive out the research questions. Four research questions were presented in order to state the research gap. This research integrates the concept of SSQ and LSQ as one process to be evaluated from the customer perspective as called SLSQ. After that, it measures the effect of SLSQ on LSP’s customer satisfaction and relationship quality. To collect the research data, a mixed method approach has been used in this research, starting from the semi-structured interviews in phase one (part one) to validate the SSQ elements. In phase one (part two), the SLSQ elements have been generated and validated through evaluation tools. Finally, in phase two, the questionnaire is designed and distributed to the target sample. The results show that SLSQ would have a significant positive effect on customer satisfaction. The findings show that customers satisfied with SLSQ will partially support the relationship between an LSP and its customers. Moreover, the findings show that CS fully mediates the relation between SLSQ and RQ. SLSQ elements focused mainly on sustainable transport, time, product condition, training programmes and collaboration. These aspects are the ones that Egyptian LSPs should consider when they present services, and the Egyptian government should consider these aspects as a power to make a sustainable development in LSP field. Dissertation, Universität Duisburg-Essen, 2021