Experimentation on a Hydraulic Energy Storage System for Mid-Size Wind Turbines

Renewable energy resource investment is crucial to mitigating the effects of climate change. One underrecognized method is improving the performance of mid-sized wind turbines. A hydraulic Energy Storage System (ESS) can be added to a midsized wind turbine transmission to improve system reliability and produce more energy. This hybrid system also offers potential ancillary benefits, such as fault ride-through and strong wind pitch and yaw control. In this paper, results of recent improvements on our previously proposed hybrid system are presented. These improvements include a more realistic accumulator model to improve simulation fidelity and the addition of a hydraulic energy storage system to the power regenerative test platform at the University of Minnesota for experimental validation. Losses of the test platform are characterized and used to improve the quality of the simulation results. Wind samples are used to experimentally validate simulation results. The updated simulation is used to create a refined prediction of the benefits of the hybrid system for a 60 kW turbine.

Investigating the effect of participatory ergonomics implementation on job satisfaction in the staff of Shahid Rajaei Faridan Hospital

Introduction: Participatory ergonomics means the participation of all components of an organization in the development and implementation of ergonomic knowledge, to optimize the working environment with the full support of the senior manager of the organization. Use it to solve problems in your work environment. This study aimed to investigate the effect of participatory ergonomics implementation on job satisfaction in the staff of Shahid Rajaei Hospital in Frieden. Materials and Methods: The present study was performed as an intervention, before and after, and in Shahid Rajaei Frieden Hospital. The data collection method was through a job spectrum questionnaire. Data analysis was performed using SPSS25 software and paired t-test. Results: The results showed, the highest job satisfaction is related to rewards and the lowest is related to ancillary benefits. The average scores obtained from the completed questionnaire before and after the intervention were 123 and 135, respectively and a significant relationship between participatory ergonomics implementation and job satisfaction was seen (P <0.03). Conclusion: In this study, participatory ergonomics was used to improve the ergonomic aspects. The results of this study showed that participatory ergonomics can increase job satisfaction among employees So that there was a significant relationship between the implementation of participatory ergonomics and job satisfaction.

Efficient Management of Power Losses from Renewable Sources Using Removable E.V. Batteries

Electric vehicles (E.V.) are one of the feasible solutions to address the challenges of sustainable development that require particular attention, such as climate change, depletion of fossil fuel reserves, and greenhouse gas emissions. In addition to the environmental benefits of electric vehicles, they can also be used as a storage system to alleviate the challenges posed by the variability of renewable electricity sources and to provide the network with ancillary benefits, such as voltage regulation and frequency regulation. Furthermore, using removable batteries by electric vehicles to store renewable energy is an innovative and effective solution to combat the increase in GHG emissions. In this article, using the autoregressive integrated moving average forecast model, we estimate the necessary storage capacity to contribute to the adjustment of the energy system increasingly powered by renewable energy sources. Also, we estimate the number of electric vehicles needed to take over the excess energy produced by renewable sources when the conventional grid cannot take over this surplus. The forecasts have the year 2050 as a time horizon. The results show that removable E.V. batteries can be an efficient solution for managing and storing energy lost in the temporal incongruity of demand with supply in the energy market.

Recoupling Climate Change and Air Quality: Exploring Low-Emission Options in Urban Transportation Using the TIMES-City Model

Fossil fuels in transportation are a significant source of local emissions in and around cities; thus, decarbonising transportation can reduce both greenhouse gases (GHGs) and air pollutants (APs). However, the degree of these reductions depends on what replaces fossil fuels. Today, GHG and AP mitigation strategies are typically ‘decoupled’ as they have different motivations and responsibilities. This study investigates the ancillary benefits on (a) APs if the transport sector is decarbonised, and (b) GHGs if APs are drastically cut and (c) the possible co-benefits from targeting APs and GHGs in parallel, using an energy-system optimisation model with a detailed and consistent representation of technology and fuel choices. While biofuels are the most cost-efficient option for meeting ambitious climate-change-mitigation targets, they have a very limited effect on reducing APs. Single-handed deep cuts in APs require a shift to zero-emission battery electric and hydrogen fuel cell vehicles (BEVs, HFCVs), which can result in significant upstream GHG emissions from electricity and hydrogen production. BEVs powered by ‘green’ electricity are identified as the most cost-efficient option for substantially cutting both GHGs and APs. A firm understanding of these empirical relationships is needed to support comprehensive mitigation strategies that tackle the range of sustainability challenges facing cities.

Further Objections

Chapter 2 discusses objections to the definition of terrorism from Chapter 1 that criticize it for being either too narrow or too broad. The narrowness criticisms object that (a) there are terrorist acts that target combatants, (b) there are terrorist acts that do not involve a political motive, such as certain criminal or religious acts, and (c) some non-intentional violence afflicting non-combatants should be encompassed by the definition. The “too broad” category of objections argues that (a) the tactical definition should include an ingredient of intentionally provoking fear, (b) the definition’s encompassing terrorist acts by states is mistaken, (c) including non-combatant property in the definition is mistaken, and (d) this approach simply defines terrorist acts as murder and loses what is distinctive of such acts. These objections are criticized and rejected for the most part, though some elicit concessional comments about their possible ancillary benefits in relation to the preferred tactical definition.

An ecological assessment of invasive plant species in a constructed stormwater wetland in Markham, Ontario, Canada

It is generally assumed that increased plant biodiversity will enhance the efficiency and effectiveness of the pollutant removal processes in wetlands constructed for stormwater management and will provide ancillary benefits for wildlife and the general public. However, the development of a diverse plant community may be jeopardized by colonization by invasive species. This study reports on a detailed assessment of the changes in plant species composition in a wetland complex constructed for stormwater management in Markham, Ontario, Canada. The research presented focuses on the relationship between the presence of invasive species, the lack of development of native species diversity, and the environmental factors that may be associated with the presence and distribution of invasive plants. Today, vegetation diversity of the wetland remains extremely poor and there has been significant establishment of invasive species, especially Typha angustifolia. Despite the complexity of the site, there are few environmental determinants for plant growth.